CONNECTION TOOLS INCLUDE RING COMPRESSION MOLDS, CLAMPING MECHANISMS, AND CLAMPING PIPE CONNECTION TOOLS

Abstract

The present application particularly relates to connection tools include ring compression molds, clamping mechanisms, and clamping pipe connection tools. The ring compression mold is used to fit with calipers of the connection tool, including: a fixed mold and a movable mold group, which contains movable molds arranged on both sides of the fixed mold. A crimping hole for a crimping target to pass through is formed in the enclosure between the fixed mold and the movable mold group, a spherical groove for the ring mold to fit with the calipers is provided on the end of the movable mold away from the fixed mold, and the edge of the ring mold spherical groove is provided with a ring mold clearance groove and ring mold convex portions located on both sides of the ring mold clearance groove.

Claims

1. A ring compression mold for connection tool to cooperate with calipers of the connection tool, comprising: a fixed mold, a movable mold group, which contains movable molds arranged on both sides of the fixed mold, a crimping hole for a crimping target to pass through is formed in the enclosure between the fixed mold and the movable mold group, and a spherical groove for the ring mold to fit with the calipers is provided on the end of the movable mold away from the fixed mold, the edge of the ring mold spherical groove is provided with a ring mold clearance groove and ring mold convex portions located on both sides of the ring mold clearance groove.

2. The ring compression mold for connection tool of claim 1, wherein the bottom of the ring mold clearance groove has an inclined arc surface, and the edge of the ring mold spherical groove is also provided with a ring mold avoidance groove, which is located on the opposite side of the ring mold clearance groove.

3. The ring compression mold for connection tool of claim 1, wherein the fixed mold is integrated, with a fixed mold groove formed on the side facing the crimping hole, the fixed mold groove has a pair of fixed mold convex edges and a fixed mold acting surface which is located between the pair of fixed mold convex edges and recessed; and the movable mold is integrated, with a movable mold groove formed on the side facing the crimping hole, the movable mold groove has a pair of movable mold convex edges and a movable mold acting surface which is located between the pair of fixed mold convex edges and recessed.

4. The ring compression mold for connection tool of claim 2, wherein the fixed mold is integrated, with a fixed mold groove formed on the side facing the crimping hole, the fixed mold groove has a pair of fixed mold convex edges and a fixed mold acting surface which is located between the pair of fixed mold convex edges and recessed; and the movable mold is integrated, with a movable mold groove formed on the side facing the crimping hole, the movable mold groove has a pair of movable mold convex edges and a movable mold acting surface which is located between the pair of fixed mold convex edges and recessed.

5. The ring compression mold for connection tool of claim 1, wherein the movable mold comprises: a movable mold pressing seat, one end of which is rotatably connected to the fixed mold, the other end of which is provided with a ring mold spherical groove, and the side of which facing the crimping hole is provided with an arc-shaped guide chute; a movable mold pressing segment, which is movably arranged on the movable mold pressing seat and formed with an arc-shaped guide slider that matches the arc-shaped guide chute, and the arc-shaped guide slider is also provided with a limiting notch along the arc direction; a blocking member, which is inserted at the end of the movable mold pressing seat away from the fixed mold, and it axially penetrates through the arc-shaped guide chute to block one end of the arc-shaped guide slider; a limiting member, which is inserted on the movable mold pressing seat, and axially penetrates through the limiting notch; an elastic member, which is installed in the limiting notch; and a steel ball, one end of which is abutted against the elastic member, and the other end of which is abutted against the limiting member; the arc length of the arc-shaped guide slider is smaller than that of the arc-shaped guide chute.

6. The ring compression mold for connection tool of claim 2, wherein the movable mold comprises: a movable mold pressing seat, one end of which is rotatably connected to the fixed mold, the other end of which is provided with a ring mold spherical groove, and the side of which facing the crimping hole is provided with an arc-shaped guide chute; a movable mold pressing segment, which is movably arranged on the movable mold pressing seat and formed with an arc-shaped guide slider that matches the arc-shaped guide chute, and the arc-shaped guide slider is also provided with a limiting notch along the arc direction; a blocking member, which is inserted at the end of the movable mold pressing seat away from the fixed mold, and it axially penetrates through the arc-shaped guide chute to block one end of the arc-shaped guide slider; a limiting member, which is inserted on the movable mold pressing seat, and axially penetrates through the limiting notch; an elastic member, which is installed in the limiting notch; and a steel ball, one end of which is abutted against the elastic member, and the other end of which is abutted against the limiting member; the arc length of the arc-shaped guide slider is smaller than that of the arc-shaped guide chute.

7. The ring compression mold for connection tool of claim 5, wherein the movable mold pressing seat and the movable mold pressing segment are provided with corresponding inspection markings; and the bottom of the arc-shaped guide chute protrudes to one side to form a limiting groove, and the outer end portion of the arc-shaped guide slider protrudes to one side to form a limiting convex edge embedded in the limiting groove.

8. The ring compression mold for connection tool of claim 6, wherein the movable mold pressing seat and the movable mold pressing segment are provided with corresponding inspection markings; and the bottom of the arc-shaped guide chute protrudes to one side to form a limiting groove, and the outer end portion of the arc-shaped guide slider protrudes to one side to form a limiting convex edge embedded in the limiting groove.

9. The ring compression mold for connection tool of claim 5, wherein a pair of plugboards are respectively formed at both ends of the fixed mold pressing seat, the sides of the movable mold pressing seats which are located at both ends of the fixed mold pressing seat and face to one side of the fixed mold pressing seat are respectively provided with a pair of slots for inserting the plugboards, and the rotating ends of the movable mold pressing seat and the fixed mold pressing seat are also provided with a limiting assembly; the limiting assembly comprises: cylindrical locating pins, which are inserted into the plugboards at both ends of the fixed mold pressing seat; and a limiting plugboard, which is formed between a pair of slots in the movable mold pressing seat, and limit protrusions are provided at the outer end of the limiting plugboard to fit with the cylindrical locating pins.

10. The ring compression mold for connection tool of claim 6, wherein a pair of plugboards are respectively formed at both ends of the fixed mold pressing seat, the sides of the movable mold pressing seats which are located at both ends of the fixed mold pressing seat and face to one side of the fixed mold pressing seat are respectively provided with a pair of slots for inserting the plugboards, and the rotating ends of the movable mold pressing seat and the fixed mold pressing seat are also provided with a limiting assembly; the limiting assembly comprises: cylindrical locating pins, which are inserted into the plugboards at both ends of the fixed mold pressing seat; and a limiting plugboard, which is formed between a pair of slots in the movable mold pressing seat, and limit protrusions are provided at the outer end of the limiting plugboard to fit with the cylindrical locating pins.

11. The ring compression mold for connection tool of claim 3, wherein a first notch is provided at one end of the fixed mold close to the movable mold, a second notch is provided at one end of the movable mold close to the fixed mold, and a first dust storage groove is formed between the first notch and the second notch.

12. A clamping mechanism for connection tool, wherein it is clamped on a crimping target to crimp the crimping target, comprising: calipers, having a pair of tong arms, a ring compression mold, which is detachably installed on the calipers, the ring compression mold is that for connection tool of claim 1, the pair of tong arms are provided with a spherical mating portion which fits with the ring mold spherical groove, and one side of the spherical mating portion is provided with a caliper clearance groove for avoiding the convex portion.

13. A clamping pipe connection tool, comprising: a driving portion, a clamping mechanism, which is the clamping mechanism for connection tool of claim 12, the calipers are installed on the driving part to operate driven by the driving portion.

14. The clamping pipe connection tool of claim 13, comprising a pressing ring, which is provided with a pair of symmetrically arranged pressing ring arms, and the pair of pressing ring arms enclose to form a ring pressing hole for the crimping target to pass through; the ends of the pair of pressing ring arms are hinged to each other, the other ends of them are separately arranged, and the separated ends are provided with a pressing ring spherical groove that fits with the spherical mating portion; the edge of the pressing ring spherical groove is provided with a pressing ring clearance groove and pressing ring convex portions located on both sides of the pressing ring clearance groove; and one of the ring compression mold and the pressing ring is selected to be rotatably installed on the calipers for operation.

15. The clamping pipe connection tool of claim 14, wherein the pressing ring is also provided with: a hinge pin, which is used to rotatably connect the ends for a pair of pressing ring arms together, and a torsion spring, which is sleeved on the hinge pin to act on the pair of pressing ring arms respectively, the pressing ring arm is provided with a hinged end, on which rotating plates are provided to plug the pair of pressing ring arms together, a limiting convex edge protrudes outward on the rotating plate to limit the rotation angle, third notches are correspondingly provided in the middle part of the pair of pressing ring arms on the side of the first crimping hole, and a second dust storage groove trough is formed between the two third notches.

16. The clamping pipe connection tool of claim 13, wherein the calipers comprise: a pair of tong arms, having operating ends, on which a spherical mating portion is provided; a pair of connecting plates, which are used for connecting the middle parts of the pair of tong arms together, and the tong arms rotate relative to the connecting plates; and a pair of connecting pins, which are used for connecting the tong arms to the connecting plates.

17. The clamping pipe connection tool of claim 16, wherein driving ends are formed at the ends of the tong arms away from the operating ends, and the two driving ends have a separated state and a closed state, the driving portion comprises: a main body, a pair of rollers, which are movably arranged on the main body to act on the driving ends for the pair of tong arms, causing the two driving ends to separate from each other; and a mounting seat, which is used for mounting the calipers, when the driving ends are in the closed state, the outer sides of the driving ends protrude from the outer periphery of the mounting seat.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0022] FIG. 1 is a schematic diagram I of the state when a ring compression mold is used to crimp a second crimping target in Embodiment 1 of the present disclosure.

[0023] FIG. 2 is a schematic diagram of the state when the pressing ring is used to crimp a first crimping target in the present disclosure.

[0024] FIG. 3 is a schematic diagram II of the state when the ring compression mold is used to crimp the second crimping target in Embodiment 1 of the present disclosure.

[0025] FIG. 4 is a schematic diagram of the structure of the calipers in the present disclosure.

[0026] FIG. 5 is a schematic diagram of the structure after the calipers hides the front connecting plate in the present disclosure.

[0027] FIG. 6 is an exploded view of a part of the structure of the calipers in the present disclosure.

[0028] FIG. 7 is a side view of the calipers when they are installed on the mounting seat of the driving portion in the present disclosure.

[0029] FIG. 8 is a front view of the calipers when they are installed on the mounting seat of the driving portion in the present disclosure.

[0030] FIG. 9 is a schematic diagram of the structure of the pressing ring in the present disclosure.

[0031] FIG. 10 is a top view of the pressing ring in the present disclosure.

[0032] FIG. 11 is an exploded view of the structure of the pressing ring in the present disclosure.

[0033] FIG. 12 is a schematic diagram of the state when the ring compression mold fits with the calipers in Embodiment 1 of the present disclosure.

[0034] FIG. 13 is a schematic diagram of the structure of the ring compression mold in Embodiment 1 of the present disclosure.

[0035] FIG. 14 is a side view of the ring compression mold in Embodiment 1 of the present disclosure.

[0036] FIG. 15 is a sectional view in the direction A-A of FIG. 14.

[0037] FIG. 16 is a sectional view in the direction B-B of FIG. 14.

[0038] FIG. 17 is a sectional view in the direction C-C of FIG. 16.

[0039] FIG. 18 is an exploded view of the connection structure between the fixed mold and the movable mold of the ring compression mold in Embodiment 1 of the present disclosure.

[0040] FIG. 19 is a schematic diagram for the state when the ring compression mold is used to crimp a crimping target in Embodiment 2 of the present disclosure.

[0041] FIG. 20 is a stereogram for an open ring compression mold in Embodiment 2 of the present disclosure.

[0042] FIG. 21 is a front elevational view of an open ring compression mold in Embodiment 2 of the present disclosure.

[0043] FIG. 22 is a sectional view of the ring compression mold in Embodiment 2 of the present disclosure.

[0044] FIG. 23 is an exploded view of the structure of the ring compression mold in Embodiment 2 of the present disclosure.

[0045] FIG. 24 is a perspective view of a closed compression mold in Embodiment 2 of the present disclosure.

[0046] FIG. 25 is a front elevational view of a closed ring compression mold in Embodiment 2 of the present disclosure.

[0047] FIG. 26 is a schematic diagram for the cross section in Embodiment 3 of the present disclosure.

REFERENCE NUMERALS

[0048] first crimping target 11; second crimping target 12; pipe assembly 13; pipe 131; connecting body 132; insertion end 1321; insertion body portion 1321a; toothed ring portion 1321b; toothed ring 133; tooth 1331; sealing ring 134; retaining ring 135; [0049] driving portion 2; main body 21; roller 22; mounting seat 23; I-shaped mounting groove 231; connecting rod 24; [0050] calipers 3; left tong arm 31; left force-applying portion 311; right tong arm 32; right force applying portion 321; spherical mounting groove 322; inclined mounting groove 323; front connecting plate 33; front mounting hole 331; rear connecting plate 34; rear mounting hole 341; left connecting pin 35; right connecting pin 36; spherical mating portion 37; convex edge portion 371; calipers clearance groove 372; second steel ball 38; spring 39; [0051] pressing ring 4; left pressing ring arm 41; left rotating plate 411; left limiting convex edge 412; left socket 413; right pressing ring arm 42; right rotating plate 421; right limiting convex edge 422; right socket 423; ring pressing hole 43; hinge pin 44; torsion spring 45; second notch 46; second dust storage groove 47; pressing ring spherical groove 48; pressing ring clearance groove 481; pressing ring convex portion 482; pressing ring avoidance groove 483; [0052] ring compression mold 5; fixed mold 51; fixed mold pressing seat 511; fixed mold pressing segment 512; plugboard 513; movable mold 52; movable mold pressing seat 521; arc-shaped guide chute 5211; limiting groove 5212; mounting hole 5213; movable mold pressing segment 522; arc-shaped guide slider 5221; limiting notch 5222; limiting convex edge 5223; first notch 5224; blocking member 523; limiting member 524; elastic member 525; first steel ball 526; slot 527; crimping hole 53; ring mold spherical groove 54; ring mold clearance groove 541; ring mold convex portion 542; ring mold avoidance groove 543; inspection marking 55; first dust storage groove 56; ejector rod spring 571; ejector rod 572; cylindrical locating pin 591; limiting protrusion 592; [0053] ring compression mold 6; integrated fixed mold 61; fixed mold acting surface 611; fixed mold groove 612; fixed mold convex edge 613; slot 614; mounting hole 615; third notch 616; integrated movable mold 62; movable mold acting surface 621; movable mold groove 622; movable mold convex edge 623; plugboard 624; fourth notch 626; crimping hole 63; ring mold spherical groove 64; ring mold clearance groove 641; ring mold convex portions 642; ring mold avoidance groove 643; auxiliary mold closing structure 65; ejector rod spring 651; ejector rod 652; cylindrical pin 66; circlip 67; third dust storage groove 68;

DETAILED DESCRIPTION OF THE EMBODIMENTS

[0054] In order to make the technical means, creative features, objectives and effects achieved by the present disclosure easy to understand, the ring compression, toothed ring pipe fitting crimping device and connecting tool of the present disclosure are specifically described below in combination with embodiments and drawings.

Embodiment 1

[0055] As shown in FIGS. 1 to 3, this embodiment proposes a connection tool, in particular, a clamping pipe connection tool, which is used to crimp targets with different sizes. Taking the first crimping target 11 and the second crimping target 12 as examples, the first crimping target 11 and the second crimping target 12 are circular pipes, wherein the first crimping target is a small-diameter pipe, and its outer diameter is usually less than 30 mm; and the second crimping target is a large-diameter pipe, and its outer diameter is usually more than 30 mm. The clamping pipe connection tool comprises a driving portion 2, calipers 3, a pressure ring 4 and a ring mold 5. The calipers 3 are installed on the driving portion 2 and open and close driven by the driving portion 2. The pressure ring 4 and the ring mold 5 are respectively connected to the calipers 3 in a detachable manner, and one of the pressure ring 4 and the ring mold 5 is selected for use. As shown in FIG. 2, the pressure ring 4 is used to act on the first crimping target 11 to perform crimping on the first crimping target 11; and as shown in FIG. 1, the ring compression mold 5 is used to act on the second crimping target 12 to perform crimping on the second crimping target 12. That is, when a certain pipe is crimped, one of the pressing ring 4 and the ring compression mold 5 is selected for use. For example, when the crimping target is a small-diameter pipe, the pressing ring 4 is selected, and when the crimping target is a large-diameter pipe, the ring compression mold 5 is selected, so that the user can use the tool in scenarios where the crimping targets have different sizes.

[0056] When the pressing ring 4 or the ring compression mold 5 is connected to the calipers 3, a spherical connection structure is adopted. That is, a spherical groove (the spherical groove includes a hemispherical groove) is provided on the pressure ring 4 or the ring compression mold 5, and the spherical groove comprises a pressing ring spherical groove 48 provided on the pressing ring 4 and a ring mold spherical groove 54 provided on the ring compression mold 5. The calipers 3 are provided with a spherical mating portion that fits with the spherical groove, so that the calipers 3 and the pressing ring 4/ring compression mold 5 can rotate. As shown in FIG. 3, the relative position between the calipers 3 and the ring compression mold 5 can be rotated from the parallel position in FIG. 1 to the almost vertical position in FIG. 3, so that the driving portion 2 can be almost parallel to the second crimping target, facilitating the users to work in a narrow environment.

[0057] In order to make the spherical mating portion and the spherical groove better fit, the edge of the spherical groove is provided with a clearance groove, convex portions located on both sides of the clearance groove, and an avoidance groove located opposite to the clearance groove, and a calipers clearance groove for avoiding the convex portion is provided on one side of the spherical mating portion. Among them, the clearance groove comprises a pressing ring clearance groove 481 provided on the pressing ring 4 and a ring mold clearance groove 541 provided on the ring compression mold 5; the convex portion comprises a pressing ring convex portion 482 provided on the pressing ring 4 and a ring mold convex part 542 provided on the ring compression mold 5; and the avoidance groove comprises a pressing ring avoidance groove 483 provided on the pressing ring 4 and a ring mold avoidance groove 543 provided on the ring compression mold 5.

[0058] As shown in FIGS. 4 to 6, the calipers 3 comprise a pair of tong arms (left tong arm 31 and right tong arm 32), a pair of connecting plates (front connecting plate 33 and rear connecting plate 34) and a pair of connecting pins (left connecting pin 35 and right connecting pin 36). The left tong arm 31 and the right tong arm 32 are symmetrically arranged, and both are provided with operating ends and driving ends. The operating end is provided with the spherical mating portion 37 (in this embodiment, the spherical mating portion 37 is a hemispherical protrusion integrally formed on the operating end) at a relative position, which is used to fit with the pressing ring 4 or the ring compression mold 5. The front connecting plate 33 and the rear connecting plate 34 are respectively placed on the front and rear sides of the pair of tong arms, and are used to connect the middle parts of the pair of tong arms together. A through hole is opened in the middle of the left tong arm 31 and the right tong arm 32, and a pair of through holes are also opened at corresponding positions of the front connecting plate 33 and the rear connecting plate 34 respectively. The left connecting pin 35 and the right connecting pin 36 penetrate through the through holes on the front connecting plate 33, the left tong arm 31 (the right tong arm 32) and the rear connecting plate 34 in sequence to connect the front connecting plate 33, the rear connecting plate 34, the left tong arm 31 and the right tong arm 32 together. At the same time, the front and rear sides of the left connecting pin 35 and the right connecting pin 36 are provided with circlips to prevent their axial movement.

[0059] The left tong arm 31 and the right tong arm 32 can also rotate relative to the front connecting plate 33 and the rear connecting plate 34 through the left connecting pin 35 and the right connecting pin 36 respectively. As shown in FIGS. 1, 3 and 7, the driving portion 2 comprises a main body 21, a pair of rollers 22 acting on the left tong arm 31 and the right tong arm 32 respectively, and a mounting seat 23. The mounting seat 23 is installed at the front end of the main body 21, and an I-shaped mounting groove 231 is provided in the middle. The pair of rollers 22 are movably arranged in the mounting seat 23, and can move driven by the driving mechanism in the main body 21. A front mounting hole 331 and a rear mounting hole 341 are respectively provided on the front connecting plate 33 and the rear connecting plate 34 of the calipers 3. The calipers 3 are detachably mounted in the I-shaped mounting groove 231 through the connecting rod 24 passing through the front mounting hole 331 and the rear mounting hole 341. The pair of rollers 22 act on the inner sides of the driving ends for the left tong arm 31 and the right tong arm 32 respectively. When the rollers 22 move upwards, the two driving ends can be separated from each other to close the operating ends.

[0060] As shown in FIG. 6, a spherical mounting groove 322 and an inclined mounting groove 323 are respectively provided on the opposite sides of the middle for the left tong arm 31 and the right tong arm 32, a steel ball 38 is provided between the two oppositely arranged spherical mounting grooves 322, and a spring 39 is provided between the two oppositely arranged inclined mounting grooves. The provision of the steel ball 38 can ensure that the left tong arm 31 and the right tong arm 32 are kept synchronous during opening and closing, and the force is more uniform. The spring 39 can assist the left tong arm 31 and the right tong arm 32 to open and close.

[0061] The movement state of the calipers 3 is as follows: when the user squeezes from the outside of the force-applying end in the tail part of the left tong arm 31 and the right tong arm 32 with his hand, the driving ends of the left tong arm 31 and the right tong arm 32 approach each other to form a closed state, and the operating ends of the two gradually separate. At this time, the calipers 3 can be buckled into the spherical groove of the pressing ring 4 or the ring compression mold 5; and when the driving portion 2 is pushed outwards from the inside of the driving ends in the tail part of the left tong arm 31 and the right tong arm 32 to form a separated state, the operating ends of the two gradually approach, thereby acting on the pressing ring 4 or the ring compression mold 5 to gradually tighten and close the pressing ring 4 or the ring compression mold 5, so that crimping of the crimping target is achieved.

[0062] As shown in FIGS. 4 to 6, the outer sides for the driving ends of the left tong arm 31 and the right tong arm 32 protrude outwards to form a left force-applying portion 311 and a right force-applying portion 321 respectively. When the driving ends are in the closed state, as shown in FIG. 8, the left force-applying portion 311 and the right force-applying portion 321 protrude from the outer periphery of the mounting seat 23. During the use, the user generally holds the left force-applying portion 311 and the right force-applying portion 321 directly with fingers to press the driving ends inwards to form the closed state. The left force-applying portion 311 and the right force-applying portion 321 are arranged to protrude from the mounting seat 23, which can prevent the user's fingers from extending into the I-shaped mounting groove 231 following the driving ends, thereby protecting the user's hands and preventing the hands from being stuck or injured due to mis-starting.

[0063] As shown in FIGS. 9 to 11, the pressing ring 4 is of a two-segment type, having a pair of pressing ring arms (left pressing ring arm 41 and right pressing ring arm 42) which are symmetrically arranged, the ends of the left pressing ring arm 41 and the right pressing ring arm 42 are connected to each other, the other ends are separated, and the pair of pressing ring arms enclose to form a ring pressing hole 43 for the first crimping target 11 to pass through. The pressing ring 4 is also provided with a hinge pin 44 and a torsion spring 45, wherein the hinge pin 44 is used to rotatably connect the ends of the left pressing ring arm 41 and the right pressing ring arm 42 together, the torsion spring 45 is sleeved on the hinge pin 44, and the two ends are respectively hooked on the connecting ends of the left pressing ring arm 41 and the right pressing ring arm 42.

[0064] Specifically, the upper end connections of the left pressing ring arm 41 and the right pressing ring arm 42 respectively form a left hinged end and a right hinged end, and the left hinged end and the right hinged end are respectively provided with a left rotating plate 411 and a right rotating plate 421 for plugging the left pressing ring arm 41 and the right pressing ring arm 42 together, and the left rotating plate 411 and the right rotating plate 421 each have two pieces arranged in the front and rear, and a left socket 413 is formed between the two left rotating plates 411 for inserting one of the right rotating plates 421, and a right socket 423 is formed between the two right rotating plates 421 for inserting one of the left rotating plates 411. The hinge pin 44 penetrates through the four rotating plates in sequence, and the end is limited to move radially by the circlip, so that the left hinged end and the right hinged end are rotatably connected together. The torsion spring 45 is sleeved on the hinge pin 44 and is located between the left rotating plate 411 and the right rotating plate 421. The two ends of the torsion spring 45 are respectively hooked on the left hinged end and the right hinged end to assist the separation and closing between the left pressing ring arm 41 and the right pressing ring arm 42.

[0065] In order to limit the rotation angle between the left pressing ring arm 41 and the right pressing ring arm 42, among the two left rotating plates 411, the left rotating plate 411 inserted into the right socket 423 between the two right rotating plates 421 has a left limit convex edge 412 protruding outwards for limiting the rotation angle; and among the two right rotating plates 421, the right rotating plate 421 inserted into the left socket 413 between the two left rotating plates 411 has a right limit convex edge 422 protruding outwards for limiting the rotation angle. During the rotation process, the left limit convex edge 412 and the right limit convex edge 422 can be respectively abutted against the inner walls of the two sockets, thereby limiting the rotation angle of the left pressing ring arm 41 and the right pressing ring arm 42.

[0066] As shown in FIG. 9, the outer sides of the separated ends for the left pressing ring arm 41 and the right pressing ring arm 42 are respectively provided with a pressing ring spherical groove 48. The pressing ring spherical groove 48 fits with the spherical mating portion 37 of the calipers 3, and the edge of the pressure ring spherical groove 48 is provided with a pressing ring clearance groove 481 and pressing ring convex portions 482 located on both sides of the pressing ring clearance groove 481. As shown in FIGS. 5 to 8, the side of the spherical mating portion 37 is provided with a convex edge portion 371 which slightly protrudes from the spherical mating portion 37, and corresponds to the pressing ring convex portion 482, the inner side (the side facing to the main body of the calipers 3) of the spherical mating portion 37 is provided with a calipers clearance groove 372 for avoiding the pressing ring convex portion 482. Specifically, as shown in FIG. 9, the bottom of the pressing ring clearance groove 481 is arranged in an inclined manner, and gradually lowered from the direction of the pressing ring spherical groove 48 toward the edge side, which can increase the contact area with the edge side of the spherical mating portion 37. The pressing ring convex portion 482 is higher than the bottom of the pressing ring clearance groove 481, which can ensure the rotation stability of the spherical mating portion 37 in the pressing ring spherical groove 48, avoiding falling out of the pressing ring spherical groove 48 during the rotation. The pressing ring spherical groove 48 is also recessed on the side which is close to the main part of the left pressing ring arm 41 and the right pressing ring arm 42 to form a pressing ring avoidance groove 481, and the pressing ring avoidance groove 483 is arranged opposite to the pressing ring clearance groove 481 to avoid the convex edge portion 371 outside the spherical mating portion 37. When the spherical mating portion 37 fits with the pressing ring spherical groove 48, the spherical mating portion 37 can rotate smoothly.

[0067] In addition, as shown in FIGS. 9 and 11, the middle parts of the left pressing ring arm 41 and the right pressing arm 42 are on opposite sides of the two and are located on one side of the ring pressing hole 43 (the position between the ring pressing hole 43 and the hinged end), respectively provided with a second notch 46 in a corresponding manner, and a second dust storage groove 47 is formed between the two second notches 46 during the closing process. Since the working scene of pipe crimping is usually at the construction site, the pipe is easily contaminated with dust and impurities. During the crimping process, the dust and impurities on the pipe may enter the second dust storage groove 47 along the edge of the ring pressing hole 43, and then fall off during the opening process of the left pressing ring arm 41 and the right pressing arm 42 after the subsequent crimping is completed, thereby avoiding the accumulation of dust and impurities in the ring pressing hole 43 to affect the pipe crimping effect.

[0068] In this embodiment, the ring compression mold 5 is a multi-mold-segment type ring mold, having a fixed mold 51 and at least one movable mold group, and each movable mold group comprises two movable molds 52 symmetrically arranged on both sides of the fixed mold 51. In this embodiment, one movable mold group is mainly taken as an example for a detailed description. As shown in FIGS. 12 to 18, the two movable molds 52 are respectively provided on the left and right sides of the fixed mold 51, and a crimping hole 53 for the second crimping target 12 to pass through is formed between the two movable molds 52 and the fixed mold 51. The ends of the two movable molds 52 away from the fixed mold 51 are provided with a ring mold spherical groove 54 for fitting with the spherical mating part 37 on the calipers 3. Since the pressing ring 4 corresponds to a small-sized crimping target and the ring compression mold 5 corresponds to a large-sized crimping target, the diameter of the ring pressing hole 43 is less than or equal to that of the crimping hole 53. In actual situations, two or more movable mold groups can also be provided, and each movable mold group is connected end to end. The movable mold group in the initial position is connected to the fixed mold 51, and the movable mold group in the end position is provided with the ring mold spherical groove 54.

[0069] The size of the ring mold spherical groove 54 and the structure on the periphery are the same as the size and structure of the above pressing ring 4. That is, the ring mold spherical groove 54 fits with the spherical mating portion 37 of the calipers 3, and the edge of the ring mold spherical groove 54 is provided with a ring mold clearance groove 541 and ring mold convex portions 542 located on both sides of the ring mold clearance groove 541. As shown in FIGS. 5 to 8, the side of the spherical mating portion 37 is provided with a convex edge portion 371 which slightly protrudes from the spherical mating portion 37, and meanwhile, corresponding to the ring mold convex portion 542, the inner side (the side facing to the main body of the calipers 3) of the spherical mating portion 37 is provided with a calipers clearance groove 372 for avoiding the ring mold convex portion 542. Specifically, as shown in FIG. 13, the bottom of the ring mold clearance groove 541 is arranged in an inclined manner, and gradually lowered from the direction of the ring mold spherical groove 54 toward the edge side, which can increase the contact area with the edge side of the ring mold spherical mating portion 37. The ring mold convex portion 542 is higher than the bottom of the ring mold clearance groove 541, which can ensure the rotation stability of the spherical mating portion 37 in the ring mold spherical groove 54, avoiding falling out of the ring mold spherical groove 54 during the rotation. The ring mold spherical groove 54 is also recessed on the side which is close to the main part of the movable mold 52 to form a ring mold avoidance groove 543, and the ring mold avoidance groove 543 is arranged opposite to the ring mold clearance groove 541 to avoid the convex edge portion 371 outside the spherical mating portion 37. When the spherical mating portion 37 fits with the ring mold spherical groove 54, the spherical mating portion 37 can rotate smoothly.

[0070] In this embodiment, the movable mold 52 comprises a movable mold pressing seat 521, a movable mold pressing segment 522, a blocking member 523, a limiting member 524, an elastic member 525 and a first steel ball 526. The movable mold pressing segment 522 is movably arranged on the side of the movable mold pressing seat 521 facing the crimping hole 53. Specifically, the movable mold pressing seat 521 is arc-shaped as a whole, one end of which is rotatably connected to the fixed mold 51, and the other end is provided with a ring mold spherical groove 54. As shown in FIG. 17, an arc-shaped guide chute 5211 is provided on the inner side (the side facing the crimping hole 53) of the movable mold pressing seat 521, and an arc-shaped guide slider 5221 fitting with the arc-shaped guide chute 5211 is protruded on the side of the movable mold pressing segment 522 facing the movable mold pressing seat 521. The arc-shaped guide slider 5221 is inserted in the arc-shaped guide chute 5211 and can slide along the arc-shaped guide chute 5211.

[0071] The arc length of the arc-shaped guide slider 5221 is smaller than that of the arc-shaped guide chute 5211, so that a vacant position is formed between the lower part of the arc-shaped guide chute 5211 and the lower end of the arc-shaped guide slider 5221, the blocking member 523 is inserted at the end of the movable mold pressing seat 521 away from the fixed mold 51, and the blocking member 523 is axially arranged to penetrate through the arc-shaped guide chute 5211. That is, the blocking member 523 is located in the vacant position to block one end of the arc-shaped guide slider 5221, preventing the arc-shaped guide slider 5221 from falling out during the sliding process.

[0072] As shown in FIGS. 15 and 18, the arc-shaped guide slider 5221 is also provided with a limiting notch 5222 along the arc direction. The elastic member 525 is a spring, and the spring and the first steel ball 526 are arranged in the limiting notch 5222; the limiting member 523 is inserted into the movable mold pressing seat 521 and penetrates through the limiting notch 5222 along the axial direction. One end of the first steel ball 526 is abutted against the elastic member 525, and the other end is abutted against the limiting member 524 under the elastic action of the elastic member 525. Among them, the limiting member 524 and the blocking member 523 are cylindrical bolts, and the setting of the two can limit the upper and lower ends of the movable mold pressing segment 522 during sliding. On the other hand, it is only necessary to remove the limiting member 524 and the blocking member 523 in turn to disassemble the movable mold pressing segment 522 and the movable mold pressing seat 521, which is very convenient and fast. In addition, the limiting member 524 and the blocking member 523 can also fine-tune the position of the movable mold pressing segment 522 to achieve an optimal crimping state.

[0073] As shown in FIGS. 12 and 13, the movable mold pressing seat 521 and the movable mold pressing segment 522 are also provided with corresponding inspection markings 55. When the inspection markings 55 on the movable mold pressing seat 521 and the movable mold pressing segment 522 are aligned with each other, it is the initial position. If the inspection markings 55 on the movable mold pressing seat 521 and the movable mold pressing segment 522 deviate during long-term use (for example, dust and impurities accumulate between the movable mold pressing segment 522 and the movable mold pressing seat 521, causing the positions of the two to deviate), the user can be prompted that there is a deviation in the position, which will affect the crimping effect. At this time, the limiting member 524 and the blocking member 523 can be disassembled, and then the movable mold pressing segment 522 can be disassembled for cleaning and then reassembled until the inspection markings 55 on the movable mold pressing seat 521 and the movable mold pressing segment 522 are adjusted to the aligned position. The inspection markings 55 are convenient for users to judge whether the movable mold can be used normally.

[0074] As shown in FIG. 17, the bottom of the arc-shaped guide chute 5211 protrudes to one side to form a limiting groove 5212, and the outer end of the arc-shaped guide slider 5221 protrudes to one side to form a limiting convex edge 5223 embedded in the limiting groove 5212, so that the connection between the arc-shaped guide chute 5211 and the arc-shaped guide slider 5221 forms a mutually buckling form, thereby enhancing the connection stability. In addition, this mutually buckling form can also make the arc-shaped guide chute 5211 a shallow groove, without having to be opened too deep, thereby making the structure lightweight while reducing the processing difficulty.

[0075] As shown in FIG. 15, the fixed mold 51 comprises a fixed mold pressing seat 511 and a fixed mold pressing segment 512 which are integrally provided. The two ends of the fixed mold pressing seat 511 are rotatably connected to a movable mold pressing seat 521, and the movable mold pressing seat 521 is provided with a mounting hole 5213 on one side facing the fixed mold pressing seat 511. An auxiliary mold closing structure is provided in the mounting hole 5213, and the auxiliary mold closing structure is provided with an ejector rod spring 571 and an ejector rod 572. One end of the ejector rod spring 571 extends into the mounting hole 5213, and the other end is sleeved on the ejector rod 572. The ejector rod 572 is nested in the other end of the ejector rod spring 571 and provided with an ejection head protruding from the ejector rod spring 571 in the radial direction, and the ejection head is abutted against the fixed mold pressing seat. The shape of the inner side for the fixed mold pressing segment 512 and the movable mold pressing segment 522 that contacts the crimping target can be set according to the standard of the pipe fittings to be crimped.

[0076] As shown in FIGS. 13 to 18, a pair of plugboards 513 are formed at both ends of the fixed mold pressing seat 511, the sides of the movable mold pressing seats 521 which are located in both ends of the fixed mold pressing seat 511 and face to one side of the fixed mold pressing seat 511 are respectively provided with a pair of slots 527 for inserting the plugboards 513, the auxiliary mold closing structure is installed in one of the plugboards 513, and the auxiliary mold closing structures located at both ends of the fixed mold pressing seat 511 are staggered. Specifically, as shown in FIG. 18, a pair of plugboards 513 are arranged up and down with a clearance in the middle. Correspondingly, three plugboards are formed on the side of the movable mold pressing seat 521 facing the fixed mold pressing seat 511, and two slots 527 are formed between the three plugboards. The middle plugboard on the movable mold pressing seat 521 is inserted into the clearance between the pair of plugboards 513 of the fixed mold pressing seat 511. The pair of plugboards 513 are respectively inserted into the two slots 527, and then the fixed mold pressing seat 511 is connected to the movable mold pressing seat 521 by passing through the five plugboards in sequence by means of the cylindrical hinge pin 58. Both ends of the cylindrical hinge pin 58 are respectively provided with circlips for limiting its radial movement.

[0077] The movable mold pressing seat 521 can rotate relative to the fixed mold pressing seat 511 with the cylindrical hinge pin 58 as the axis. A limiting assembly for limiting the rotation angle of the mold pressing seat 521 is also arranged between the fixed mold pressing seat 511 and the movable mold pressing seat 521. As shown in FIG. 16, the limiting assembly comprises a cylindrical locating pin 591 inserted in the plugboards 513 at both ends of the fixed mold pressing seat 511, and a limiting protrusion 592 formed on the outer end of a plugboard located in the middle of the movable mold pressing seat 521. On the side facing the cylindrical locating pin 591, the limiting protrusion 592 forms an arc edge that can be in contact with the circumferential surface of the cylindrical locating pin 591.

[0078] The fixed mold pressing segment 512 and the movable mold pressing segment 522 on both sides thereof are combined to form a mold segment which is in contact with the second crimping target 12 for crimping. In the initial state, as shown in the figure, there is a clearance between the fixed mold pressing segment 512 and the movable mold pressing segment 522 on both sides thereof. After the ring compression mold 5 is subjected to the force of the calipers 3, the lower ends of the two movable mold pressing segments 522 are closed to gradually move towards the side where the fixed mold pressing segment 512 is located, thereby gradually closing the clearance. When the fixed mold pressing segment 512 is abutted against the movable mold pressing segments 522 on both sides thereof and the bottoms of the two movable mold pressing segments 522 are also abutted against each other, the crimping process can be completed.

[0079] The ends of the two movable mold pressing segments 522 which are close to the end of the fixed mold pressing segment 512 are provided with a first notch 5224. A first dust storage groove 56 is formed between the first notch 5224 and the end portion of the fixed mold pressing segment 512, so that the first dust storage groove 56 still exists even reaching the position where the movable mold pressing segments 522 are abutted against the fixed mold pressing segment 512. Since the working scene of pipe crimping is usually at the construction site, the pipe is easily contaminated with dust and impurities. During the crimping process, the dust and impurities on the pipe may enter the first dust storage groove 56 along the edge of the second crimping hole 53, and then fall off during the opening process of the movable mold 52 after the subsequent crimping is completed, thereby avoiding the accumulation of dust and impurities in the second crimping hole 53 to affect the pipe crimping effect.

[0080] Operating principles of the pressing ring and the ring compression mold in this embodiment:

[0081] When crimping a target with a small diameter, select a pressing ring 4, open the pressing ring 4, and clamp it on the outer periphery of the crimping target. Install the calipers 3 on the mounting seat 23 at the front end of the main body 21, and then fit the spherical mating portion 37 on the calipers 3 with the pressing ring spherical groove 48 on the two pressing ring arms of the pressing ring 4. Start the driving portion 2, and the roller 22 acts on the two tong arms of the calipers 3, causing the front ends of the two tong arms to gradually move closer together. Under the action of the tong arms, the two pressing ring arms also gradually move closer together until the lower ends of the two pressing ring arms are closed, completing the crimping of the crimping target.

[0082] When crimping a target with a large diameter, select a ring compression mold 5, open the ring compression mold 5, and clamp it on the outer periphery of the crimping target. Install the calipers 3 on the mounting seat 23 at the front end of the main body 21, and then fit the spherical mating portion 37 on the calipers 3 with the ring mold spherical groove 54 on the two movable molds of the ring compression mold 5. Start the driving portion 2, and the roller 22 acts on the two tong arms of the calipers 3, causing the front ends of the two tong arms to gradually move closer together. Under the action of the tong arms, the two movable molds also gradually move closer together, and the movable mold pressing segment 522 gradually moves towards the fixed mold pressing segment 512 until the lower ends of the two movable mold pressing segments 522 are closed and the upper ends are respectively closed with the fixed mold pressing segment 512, completing the crimping of the crimping target.

[0083] In this embodiment, the ring compression mold 5 adopts a ring mold structure with 3 mold segments or more, and the movable mold adopts a guide slide design, with a spring reset device arranged in the middle, ensuring that the mold segments shrink evenly during the crimping process and the pipe fittings are well centered after being crimped; and a pin hinged design is adopted between the fixed mold 51 and the movable mold 52 of the ring compression mold 5, and a limiting assembly is also arranged at the connection between the two, which can limit the rotation angle of the two movable mold pressing segments 522 to be too large, preventing the two movable mold pressing segments 522 from producing unilateral squeezing due to uneven wall thickness of the pipe fittings thereby causing a poor crimping effect.

[0084] Furthermore, the ring compression mold 5 adopts a lightweight multi-segment ring mold structure design. With the lightweight design of the shallow arc guide chute on the movable mold pressing seat 521, it is convenient for processing. In addition, by adopting a shallow guide slide to guide the two ends, the structure is more compact.

[0085] Furthermore, the pressure ring 4 and the ring compression mold 5 are structurally designed to limit the opening (rotation) angle. That is, a smaller pressure ring 4 cannot be buckled on a larger pipe fitting (the second crimping target), thereby protecting the pressure ring 4, so that the fool-proof (error-proof) measures are implemented to avoid incorrect use of the pressure ring 4 and the ring compression mold 5.

[0086] Furthermore, the ring compression mold 5 has inspection markings in a non-crimping state, which facilitates the user to check whether the mold segments of the ring mold are flexible in the initial state before construction.

[0087] Furthermore, the pressing ring 4 and the ring compression mold 5 have a buckling and anti-slip design to prevent them from falling off the pipe fittings and causing injuries. For example, the ring compression mold 5 is designed with an auxiliary mold closing structure formed by a combination of the ejector rod spring and the ejector rod, and combined with the above-mentioned limiting assembly. When the second crimping mold 5 is buckled on the crimping target or when the crimping is completed, the ring mold can be prevented from falling from the pipe fitting under the action of the auxiliary mold closing structure, avoiding causing harm to the user; and the torsion spring 45 on the pressing ring 4 can also play a similar role.

Embodiment 2

[0088] As shown in FIG. 19, this embodiment proposes a connection tool for crimping a crimping target (such as a pipe assembly 13). The connection tool comprises a driving portion (it can be a hydraulic driving mechanism, not shown in the figure), calipers 3 and a ring compression mold 6, wherein the driving portion and the calipers 3 may adopt the same structure as the above-mentioned embodiment 1, the ring compression mold 6 and the above-mentioned pressing ring 4 and ring compression 5 (select one of them to use) may be used together with the calipers 3, or the ring compression mold 6 and the ring compression mold 5 may be used in an alternative manner. The calipers 3 are universal joint calipers for buckling with the ring mold and are installed on the driving portion to open and close driven by the driving portion, and the ring compression mold 6 and the calipers 3 are detachably installed. The ring compression mold 6 has an open state and a closed state. Driven by the driving portion, the calipers 3 act on the ring compression mold 6 and can change the ring compression mold 6 from the open state to the closed state.

[0089] When the ring compression mold 6 is connected to the calipers 3, the spherical connection structure is also adopted. That is, a spherical groove 64 is provided on the ring compression mold 6. The calipers 3 are provided with a spherical mating portion 37 that fits with the spherical groove 64, so that the calipers 3 and the ring compression mold 6 can rotate. The relative position between the calipers 3 and the ring compression mold 5 can also be rotated from the parallel position to the almost vertical position, so that the calipers 3 (driving portion) can be almost parallel to the pipe assembly 13, facilitating the users to work in a narrow environment (such as the pipe shaft).

[0090] As shown in FIG. 20, the ring compression mold 6 is a multi-segment ring mold, having an integrated fixed mold 61 and at least one movable mold group. Each movable mold group comprises two integrated movable molds 62 symmetrically arranged on both sides of the integrated fixed mold 61, and a crimping hole 63 for the pipe assembly 13 to pass through is formed between the integrated fixed mold 61 and the movable mold group. In this embodiment, one movable mold group is mainly taken as an example for a detailed description. As shown in FIGS. 20 to 23, the two integrated movable molds 62 are symmetrically and rotatably disposed on the left and right sides of the integrated fixed mold 61, respectively. The integrated fixed mold 61 has an arc-shaped fixed mold acting surface 611 acting on the pipe assembly 13, and the integrated movable mold 62 has an arc-shaped movable mold acting surface 621 acting on the pipe assembly 13. After the two integrated movable molds 62 are assembled with the integrated fixed mold 61, the fixed mold acting surface 611 enclose with the left and right movable mold acting surfaces 621 to form a crimping hole 63. A spherical groove 64 is provided on one end of the two integrated movable molds 62 away from the integrated fixed mold 61 for fitting with the spherical mating portion 37 on the calipers 3 (as shown in FIG. 2).

[0091] In the present embodiment, the ring compression mold 6 is of three-segment type, i.e., one integral fixed mold and two integral movable molds. While in actual situations, the integral movable mold group may also be provided with two or more, such as a five-segment type, i.e., one integral fixed mold 61 and four integral movable molds 62. The integral movable molds 62 are arranged in pairs to form a movable mold group. Each movable mold group is connected end to end, the integral movable mold group in the initial position is connected to the integral fixed mold 61, and the integral movable mold group in the end position is provided with the spherical groove 64.

[0092] The spherical groove 64 fits with the spherical mating portion 37 of the calipers 3, and the edge of the spherical groove 64 is provided with a ring mold clearance groove 641 and ring mold convex portions 642 located on both sides of the ring mold clearance groove 641. Specifically, as shown in FIG. 20, the bottom of the ring mold clearance groove 641 is arranged in an inclined manner, and gradually lowered from the direction of the ring mold spherical groove 64 toward the edge side, which can increase the contact area with the edge side of the spherical mating portion 37. The ring mold convex portion 642 is higher than the bottom of the ring mold clearance groove 641, which can ensure the rotation stability of the spherical mating portion 37 in the spherical groove 64, avoiding falling out of the ring mold spherical groove 64 during the rotation. The ring mold spherical groove 54 is also recessed on the side which is close to the main part of the integrated movable mold 62 to form a ring mold avoidance groove 643, and the ring mold avoidance groove 643 is arranged opposite to the ring mold clearance groove 641 to avoid the spherical mating portion 37. When the spherical mating portion 37 fits with the ring mold spherical groove 64, the spherical mating portion 37 can rotate smoothly.

[0093] The ring mold clearance groove 641 has the main function of ensuring the spherical mating portion 37 on the calipers 3 to be smoothly clamped into the ring mold spherical groove 64 on the ring compression mold 6. For example, in some relatively harsh construction environments (such as a pipe installed in the wall, with a smaller space for extending the tools), the spherical mating portion 37 on the calipers 3 can be clamped into the ring mold spherical groove 64 at multiple angles along the ring mold clearance groove 641. The provision of the ring mold clearance groove 641 can also make the distance between the bottoms of two integrated movable molds 62 for the ring compression mold 6 obviously reduced. As shown in FIG. 4, the distance d matches the distance between two spherical mating portions 37 after the calipers 3 are opened on the top. Meanwhile, the bottom of the ring mold clearance groove 641 is arranged in an inclined manner, making the spherical mating portion 37 more smoothly clamped into the ring mold spherical groove 64. More specifically, when the calipers 3 fit with the ring compression mold 6, the bottom of the calipers 3 shall be held to make the top open. With the design of the ring mold clearance groove 641, the ring compression mold 6 has a lower requirement for the opening distance on top of the calipers 3, that is, the clamping can be realized easily and smoothly without opening the top of the calipers 3 very wide. In other words, when the ring compression mold 6 of the same size is used, the opening size of the calipers 3 corresponding to the ring compression mold 6 designed with the ring mold clearance groove 641 is much smaller than that of the calipers 3 corresponding to the ring compression mold without the clearance groove. With the small opening size of the calipers 3, more labor can be saved when the calipers 3 are held to open, and the size of the calipers 3 can also be reduced, so that miniaturization, lightness and portability of the entire tool are further achieved.

[0094] In addition, after the calipers 3 are clamped into the ring compression mold 6, due to the arrangement of the ring mold clearance groove 641 and the ring mold convex portion 642, the spherical mating portion 37 on the calipers 3 can be more stably clamped in the ring mold spherical groove 64. Even if the driving portion is released, the calipers 3 can still be buckled in the ring compression mold 6 without falling off, thereby effectively avoiding the occurrence of safety accidents such as injuries caused by falling during construction.

[0095] In this embodiment, since both the fixed mold and the movable mold adopt the integrated structure, the entire ring compression mold 6 is compact and small in structure, which is conducive to the development of lightweight and miniaturized products. At the same time, since the integrated structure has fewer components, the possibility of component failure is greatly reduced, making the structure more stable and durable. Specifically, the integrated fixed mold 61 is solid as a whole, and a fixed mold groove 612 is formed on the side facing the crimping hole 63. The fixed mold groove 612 has a pair of fixed mold convex edges 613 and a recessed first arc-shaped concave surface located between the pair of fixed mold convex edges 613, and the first arc-shaped concave surface is the fixed mold acting surface 611. Similarly, the integrated movable mold 62 is solid as a whole, and a movable mold groove 622 is formed on the side facing the crimping hole 63. The movable mold groove has a pair of movable mold convex edges 623 and a recessed second arc-shaped concave surface located between the pair of movable mold convex edges 623, and the second arc-shaped concave surface is the movable mold acting surface 621. The fixed mold acting surface 611 and the movable mold acting surface 621 are in contact with the pipe assembly to be crimped, and the integrated structure is more concise and compact. At the same time, the arrangement of the fixed mold convex edge 613 and the movable mold convex edge 623 can also form a positioning effect on the pipe assembly 13, ensuring that the crimping part of the pipe assembly 13 is just in the fixed mold groove 612 and the movable mold groove 622, so that the fixed mold acting surface 611 and the movable mold acting surface 621 can act on the crimping part of the pipe assembly.

[0096] The ring compression mold 6 has an open state and a closed state. As shown in FIG. 19, when the pipe assembly 13 to be crimped is clamped into the ring compression mold 6, the ring compression mold 6 is stretched open by the pipe assembly 1 to be in an open state. As shown in FIG. 21, in the open state, the integral fixed die 61 and the two integral movable molds 62 are not completely closed. At this time, the area of the crimping hole 63 enclosed by the three is actually an open circular shape (there is a clearance between the integral fixed mold 61 and the integral movable molds 62, and the bottom ends of the two one-piece movable molds 62 have openings). When crimping is required, after the pipe assembly to be crimped is inserted into the crimping hole 63, the calipers 3 is clamped at the ring mold spherical groove 64 on the opening end of the ring compression mold 6, and the driving portion is started to gradually close the two integral movable molds 62; and meanwhile, the clearance between the integral movable molds 62 and the integral fixed mold 61 is gradually reduced, finally reaching the closed state where the integral fixed mold 61 and the integral movable molds 62 are connected end to end as shown in FIGS. 24 and 25. At this time, the fixed mold groove 612 and the movable mold groove 622 on both sides can enclose to form a complete circular contour.

[0097] As shown in FIGS. 22 to 23, the two ends of the integral fixed mold 61 are respectively rotatably connected to an integral movable mold 62. The specific rotation structure is as follows: a pair of plugboards 624 are provided at one end of the integral movable mold 62 close to the integral fixed mold 61, and a pair of slots 614 for inserting the pair of plugboards 624 are respectively formed at the two ends of the integral fixed mold 61. After the plugboards 624 are inserted into the slots 614, they are fixed by cylindrical pins 66 and circlip 67. In addition, at least one slot 614 in the pair of slots 614 is provided with a mounting hole 615, and the mounting hole 615 is internally provided with an auxiliary mold closing structure 65. The auxiliary mold closing structure 65 comprises an ejector rod spring 651 and an ejector rod 652. One end of the ejector rod spring 651 extends into the mounting hole 615, and the other end is sleeved on the ejector rod 652. The rod body of the ejector rod 652 is nested in the ejector rod spring 651. The ejector rod 652 has an ejection head protruding radially from the ejector rod spring 651. The ejection head is abutted against the inner edge of the plugboard 624 for the integral movable mold 62, so that the ring compression mold 6 is in a closed posture in its natural state when not operating.

[0098] A third notch 616 is provided on the inner side of the fixed mold groove 612 on both ends of the integral fixed mold 61 close to the integral movable mold. A fourth notch 626 is provided on the inner side of the movable mold groove 622 on the end close to the integral fixed mold 61. A third dust storage groove 68 is formed between the third notch 616 and the fourth notch 626, so that the dust storage groove 68 still exists even reaching the position where the integral movable mold 62 is abutted against the integral fixed mold 61. Since the working scene of pipe crimping is usually at the construction site, the pipe is easily contaminated with dust and impurities. During the crimping process, the dust and impurities on the pipe may enter the dust storage groove 68 along the edge of the crimping hole 63, and then fall off during the opening process of the integral movable mold 62 after the subsequent crimping is completed, thereby avoiding the accumulation of dust and impurities in the crimping hole 63 to affect the pipe crimping effect.

[0099] Since the ring compression mold, toothed ring pipe fitting crimping device and connection tool used in this embodiment adopt the integral fixed mold and the integral movable mold, the entire structure is small and compact, with fewer parts, which greatly reduces the weight of the ring mold, making the ring mold miniaturized and lightweight as well as more convenient for users to carry and use.

Embodiment 3

[0100] This embodiment proposes a toothed ring pipe fitting crimping device based on the above embodiment 3. The device comprises: a pipe assembly 13 and a ring compression mold 6, wherein the ring compression mold 6 is the ring compression mold 6 described in the above embodiment 3. When working, the ring compression mold 6 embraces the outside of the pipe assembly 13 to crimp the pipe assembly 13. Specifically, as shown in FIG. 26, the pipe assembly 13 comprises a pipe 131 and a connector, and the connector is used to connect with the pipe 131. The connector comprises a connecting body 132, a toothed ring 133, a sealing ring 134 and a retaining ring 135. The connecting body 132 comprises an insertion end 1321 for inserting one end of the pipe 131. The insertion end 1321 comprises an insertion body portion 1321a and a toothed ring portion 1321b. The toothed ring 133 is arranged on the inner wall of the toothed ring portion 1321b for the insertion end 1321, and the toothed ring portion 1321b is sleeved on the outer periphery of the pipe 131. The inner wall of the toothed ring 133 is provided with a plurality of teeth 1331 for engaging on the outer wall of the pipe 131. Meanwhile, the retaining ring 135 and the sealing ring 134 are also sequentially built into the toothed ring portion 1321b, and the sealing ring 134 and the retaining ring 135 are located on the side of the toothed ring 133 close to the insertion body portion 1321a, and the retaining ring 135 is located between the sealing ring 134 and the toothed ring 133. When the ring compression mold 6 embraces the outside of the pipe assembly 13 for crimping, the outer periphery of the toothed ring portion 1321b corresponds to (is aligned with) the fixed mold acting surface 611 and the movable mold acting surface 621.

[0101] As shown in FIG. 26, the inner diameter of the insertion body portion 1321a is equivalent to the outer diameter of the pipe 131 and slightly larger than the outer diameter of the pipe 131, so that one end of the pipe 131 can be inserted into the insertion body portion 1321a. Since the toothed ring portion 1321b is to be installed with the toothed ring 133, the inner diameter of the toothed ring portion 1321b is enlarged to be larger than the inner diameter of the insertion body portion 1321a, and the position of the toothed ring portion 1321b is the position for interacting with the ring compression mold 6. In addition, a retaining edge 1322 is formed at the outer end of the toothed ring portion 1321b to be abutted against the outer end surface of the toothed ring 133. The inner end surface of the retaining edge 1322 can be blocked on the outer side of the toothed ring 133 to prevent the toothed ring 133 from falling out. The outer end surface of the retaining edge 1322 can be positioned with the fixed mold convex edge 613 and the movable mold convex edge 614 on the ring compression mold 6 (that is, the outer end surface of the retaining edge 1322 can be abutted against the inner side of the fixed mold convex edge 613 and the movable mold convex edge 614), ensuring that the toothed ring portion 1321b can be located in the fixed mold groove 612 and the movable mold groove 613, so that the ring compression mold 6 can crimp the toothed ring portion 1321b.

[0102] During operation, the ring compression mold 6 is clamped on the outside of the toothed ring portion 1321b. The ring compression mold 6 can squeeze and deform the toothed ring portion 1321b during the closing process. At the same time, the teeth 1331 on the toothed ring 133 are also deformed due to squeezing, and seized on the surface of the pipe 131 to achieve the connection between the connector and the pipe 131. The connector can withstand the outward thrust of the pipe 131 under pressure, as well as the tensile force of the pipe 131 and the connector under the action of external force. The connector shown in FIG. 26 of this embodiment is a two-way tubular connector. That is, both ends of the connector are provided with an equal-diameter insertion end 1321, and the toothed ring portion 1321b of each insertion end 1321 is provided with a pair of toothed rings 133, a sealing ring 134 and a retaining ring 135, which can be connected to a pipe 131 respectively to achieve the connection between two pipes 131. In actual situations, it can also be made into the forms of three-way, four-way, etc. so as to achieve the connection of multiple pipes 131. In addition, each insertion end 1321 on the connector can be configured to have different inner diameters, thereby achieving the connection of pipes 131 with different diameters.

Functions and Effect of the Embodiments

[0103] In the above embodiments, the spherical groove is provided on the ring compression mold and the pressure ring, and the spherical mating portion 37 fitting with the spherical groove is provided on the calipers 3, so that the calipers 3 and the ring compression mold or the pressing ring 4 adopt spherical contact fitting when they are connected, making the calipers 3 and the ring compression mold or the pressing ring 4 rotate during the operation. Therefore more angles are formed to achieve universal crimping to adapt to different operating environments, especially some relatively narrow construction environments such as pipe shafts and wall holes. Further, the edge of the spherical groove is provided with the clearance groove and the convex portion located on both sides of the clearance groove, and the calipers clearance groove for avoiding the convex portion is provided on one side of the spherical mating portion, so that the calipers will not hinder each other during the connection with the ring compression mold or the pressing ring, solving the interference problem when crimping at any angle, making the connection and rotation smoother, ensuring the strength of the buckled ball socket, preventing the calipers from being separated from the ring compression mold or the pressing ring, and achieving the purpose of lightweight structure.

[0104] In the above embodiments, the ring compression mold and the pressing ring are provided with dust storage grooves, which can reduce the risk of failure to close the molds due to mud, sand, and the squeezing of the heat shrink film for the leak-proof clip at the construction site.

[0105] Since the clamping pipe connection tool proposed in the above embodiments is provided with the pressing ring 4, ring compression mold 5 and/or ring compression mold 6, one of the pressing ring 4, the compression mold 5 and/or ring compression mold 6 is selectively installed on the calipers 3 for use during operation, and the ring pressing hole 43 and the crimping hole 53 in the pressing ring 4 and the ring compression mold 5 have different diameters, the user can select an appropriate crimping mold for crimping according to the type or size of the target object to be crimped during use, and only the crimping mold needs to be replaced during the replacement, which is very convenient and quick.

[0106] Furthermore, the same calipers 3 can meet the requirements of crimping connection for pipes of various materials and specifications. For crimping targets of small-diameter pipes (e.g. pipes with a nominal diameter of 30 mm or less), a two-segment pressing ring is used for crimping, so that the tool structure design is simplified; for crimping targets of large-diameter pipes (e.g. pipes with a nominal diameter of more than 30 mm), a structure of ring compression mold 5 with 3 or more segments is used, and the ring compression mold 5 adopts a guide slide design and is provided with a spring reset device in the middle to ensure uniform contraction of the mold segments during the crimping process and good centering of the pipe fittings after crimping. Furthermore, with the design of the convex edge portion 371 warping outwards at the tail of the calipers 3, the calipers are convenient for opening by hand-held pressing, avoiding the user's fingers getting stuck in the mounting seat 23 of the driving portion 2 and causing harm.

[0107] The above embodiments are only used to illustrate the specific implementation modes of the present disclosure, and the present disclosure is not limited to the description scope of the above embodiments.