MISALIGNED LOCKING AND RELEASING RATCHET MECHANISM AND RATCHET CLAMP

Abstract

The present invention discloses a ratchet clamp comprising a first clamping arm and a second clamping arm which are pivotally connected with each other via a connecting shaft so as to be opened and closed relative to each other, a ratchet assembly, a swing assembly and a control assembly provided between the first clamping arm and the second clamping arm; the ratchet toothed assembly has a plurality of first ratchet teeth and a plurality of second ratchet teeth which are juxtaposed and are misaligned with each other; the swing assembly and the ratchet toothed assembly are moved away from or towards each other with the connecting shaft as the axial center of rotation; a latch member of the control assembly has at least a first pawl and at least a second pawl, a wrench member of the control assembly is used for toggling the latch member to be moved, the first pawls and the second pawls are respectively engaged with the corresponding first ratchet teeth and second ratchet teeth when the latch member is moved to an engaged position, and the first pawls and the second pawls are respectively moved away from the corresponding first ratchet teeth and the second ratchet teeth when the latch member is moved to a released position. With the misaligned ratchet tooth design, the tooth profile may not be reduced, thereby increasing the structural strength, so that the overall clamping force is greatly enhanced.

Claims

1. A misaligned locking and releasing ratchet mechanism comprising: a ratchet toothed assembly comprising one or more racks each having a plurality of ratchet teeth, the ratchet teeth on the different racks are juxtaposed and misaligned with each other; and a control member having a latch portion and a trigger portion, the latch portion has one or more pawls each having one or more ratchet teeth, the ratchet teeth on the different pawls are juxtaposed and misaligned with each other; the trigger portion is used for toggling the control member, so that the pawls of the latch portion and the racks of the ratchet toothed assembly are moved between an engaged position and a released position; one or more of the ratchet teeth on only one of the racks are engaged with the corresponding one or more ratchet teeth and the other racks are not engaged with the corresponding ratchet teeth of the pawls when the latch portion is moved to the engaged position, and all the racks and the pawls are simultaneously released when the latch portion is moved to the released position.

2. The misaligned locking and releasing ratchet mechanism according to claim 1, wherein the control member is an assembly, comprising a latch member and a wrench member, the wrench member has a protrusion, the latch member has an indentation, the protrusion is used for being embedded into the indentation, the protrusion toggles the latch member within the indentation to be rotationally displaced when the wrench member is rotationally displaced.

3. A ratchet clamp comprising a first clamping arm, a second clamping arm and a ratchet mechanism, the first clamping arm and the second clamping arm are pivotally connected to each other via a connecting shaft so as to be opened and closed relative to each other, the ratchet mechanism is provided between the first clamping arm and the second clamping arm, wherein: the ratchet mechanism comprises: a ratchet toothed assembly provided on the first clamping arm, the ratchet toothed assembly comprising one or more racks each having a plurality of ratchet teeth, the ratchet teeth on the different racks are juxtaposed and misaligned with each other; a swing assembly provided on the second clamping arm, the first clamping arm and the second clamping arm respectively drive the swing assembly and the ratchet toothed assembly to move away from or towards each other with the connecting shaft as the axial center of rotation; and a control member having a latch portion and a trigger portion, the latch portion has one or more pawls each having one or more ratchet teeth, the ratchet teeth on the different pawls are juxtaposed and misaligned with each other; the trigger portion is used for toggling the control member, so that the pawls of the latch portion and the racks of the ratchet toothed assembly are moved between an engaged position and a released position; one or more of the ratchet teeth on only one of the racks are engaged with the corresponding one or more ratchet teeth and the other racks are not engaged with the corresponding ratchet teeth of the pawls when the latch portion is moved to the engaged position, and all of the racks and the pawls are simultaneously released when the latch portion is moved to the released position; and an elastic component provided between the trigger portion and the second clamping arm so that the first ratchet tooth and the second ratchet tooth are held in engagement.

4. The ratchet clamp according to claim 3, wherein the control member is a control assembly comprising a latch member and a wrench member, the wrench member has a protrusion and the latch member has an indentation, the protrusion is used for being embedded into the indentation, the protrusion toggles the latch member within the indentation to be rotationally displaced when the wrench member is rotationally displaced.

5. The ratchet clamp according to claim 3, wherein the connecting shaft is sleeved with a torsion spring, the two ends of the torsion spring abut against the first clamping arm and the second clamping arm, respectively, the first clamping arm and the second clamping arm are normally held in an open position by means of elastic force of the torsion spring, the swing assembly is pivotally connected to the second clamping arm via a first shaft through which the swing assembly is braked to be moved along with the second clamping arm, the ratchet toothed assembly is pivotally connected to the first clamping arm via a second shaft and a third shaft through which the ratchet toothed assembly is braked to be moved along with the first clamping arm.

6. The ratchet clamp according to claim 3, wherein the swing assembly comprises: a guide groove formed on one side of the swing assembly for the ratchet toothed assembly to slide therein, the ratchet toothed assembly is arcuate strip-shaped, the shape of the guide groove matches the shape of the ratchet toothed assembly, so that the ratchet toothed assembly slides in the guide groove in an arcuate path; a receiving groove formed on the other side of the swing assembly for the control assembly to be pivotally provided therein; and an opening provided between the guide groove and the receiving groove for the guide groove and the receiving groove to communicate with each other, the plurality of ratchet teeth extend through the opening into the receiving groove when the ratchet toothed assembly is placed into the guide groove, so that the plurality of ratchet teeth correspond to the pawls.

7. The ratchet clamp according to claim 4, wherein the control assembly comprises a latch member and a wrench member, the latch member comprises first pawls and second pawls, and only one pair of the racks and pawls is engaged and the other pair is not engaged when the latch member is moved to the engaged position, and the two pairs of racks and pawls are simultaneously released when the latch member is moved to the released position.

8. The ratchet clamp according to claim 7, wherein a plurality of first ratchet teeth and a plurality of second ratchet teeth extend through the opening into the receiving groove when the ratchet toothed assembly is placed into the guide groove, so that the plurality of first ratchet teeth correspond to the first pawls and the plurality of second ratchet teeth correspond to the second pawls.

9. The ratchet clamp according to claim 8, wherein the ratchet toothed assembly comprises: a first rack on which the plurality of first ratchet teeth are provided; and a second rack in parallel with the first rack on which the plurality of second ratchet teeth are provided, the first rack and the second rack are both arcuate strip-shaped, the arc centers of the first rack and the second rack coincide with the circle center of the connecting shaft.

10. The ratchet clamp according to claim 8, wherein the plurality of first ratchet teeth each have a first ratchet tooth tip end and a first ratchet tooth groove end, and the plurality of second ratchet teeth each have a second ratchet tooth tip end and a second ratchet tooth groove end, each of the first ratchet tooth tip ends and each of the second ratchet tooth groove ends are in parallel with each other, and each of the first ratchet tooth groove ends and each of the second ratchet tooth tip ends are in parallel with each other.

11. The ratchet clamp according to claim 4, wherein the control assembly comprises: a first wrench member; a second wrench member, the first wrench member and the second wrench member are respectively pivotally connected to the swing assembly via a fourth shaft, and the first wrench member and the second wrench member are respectively driven to be rotationally displaced with the fourth shaft as the center of rotation; a first latch member on which the first pawls are provided; and a second latch member on which the second pawls are provided, the first latch member and the second latch member are respectively pivotally connected to the swing assembly via a fifth shaft, and the first latch member and the second latch member are respectively driven to be rotationally displaced with the fifth shaft as the center of rotation.

12. The ratchet clamp according to claim 11, wherein the first wrench member has a first protrusion for being embedded into a first indentation of the first latch member, the second wrench member has a second protrusion for being embedded into a second indentation of the second latch member, the first protrusion toggles the first latch member within the first indentation to be rotationally displaced and the second protrusion toggles the second latch member within the second indentation to be rotationally displaced when the first wrench member and the second wrench member are rotationally displaced.

13. The ratchet clamp according to claim 11, wherein the first latch member further comprises the plurality of first pawls, the second latch member further comprises the plurality of second pawls, the first latch member and the second latch member are provided in parallel with each other, so that the plurality of first pawls and the plurality of second pawls are misaligned with each other, the plurality of first pawls each have a first pawl tip end and a first pawl groove end, the plurality of second pawls each have a second pawl tip end and a second pawl groove end, each of the first pawl tip ends and each of the second pawl groove ends are in parallel with each other, and each of the first pawl groove ends and each of the second pawl tip ends are in parallel with each other.

14. The ratchet clamp according to claim 4, wherein the ratchet toothed assembly has a first rack, the plurality of first ratchet teeth and the plurality of second ratchet teeth are juxtaposed on the first rack, respectively, the first rack is arcuate strip-shaped, and the arc center of the first rack coincides with the circle center of the connecting shaft.

15. The ratchet clamp according to claim 14, wherein the plurality of first ratchet teeth each have a first ratchet tooth tip end and a first ratchet tooth groove end, and the plurality of second ratchet tooth each have a second ratchet tooth tip end and a second ratchet tooth groove end, each of the first ratchet tooth tip ends and each of the second ratchet tooth groove ends are in parallel with each other, and each of the first ratchet tooth groove ends and each of the second ratchet tooth tip ends are in parallel with each other.

16. The ratchet clamp according to claim 4, wherein the control assembly comprises: a first wrench member which is pivotally connected to the swing assembly via a fourth shaft, the first wrench member and the second wrench member are respectively driven to be rotationally displaced with the fourth shaft as the center of rotation; and a first latch member on which the first pawls and the second pawls are provided, respectively, the first latch member is pivotally connected to the swing assembly via a fifth shaft, and the first latch member is respectively driven to be rotationally displaced with the fifth shaft as the center of rotation, the first wrench member has a first protrusion for being embedded into a first indentation of the first latch member, and the first protrusion toggles the first latch member within the first indentation to be rotationally displaced when the first wrench member is rotationally displaced.

17. The ratchet clamp according to claim 16, wherein the first latch member further comprises the plurality of first pawls and the plurality of second pawls, the plurality of first pawls and the plurality of second pawls are misaligned with each other, the plurality of first pawls each have a first pawl tip end and a first pawl groove end, and the plurality of second pawls each have a second pawl tip end and a second pawl groove end, each of the first pawl tip ends and each of the second pawl groove ends are in parallel with each other, and each of the first pawl groove ends and each of the second pawl tip ends are in parallel with each other.

18. The ratchet clamp according to claim 4, wherein the control assembly comprises: a first wrench member; a trigger member which is juxtaposed at the side of the first wrench member and is smaller than the first wrench member, the first wrench member and the trigger member are respectively pivotally connected to the swing assembly via a fourth shaft, and the first wrench member and the trigger member are respectively driven to be rotationally displaced with the fourth shaft as the center of rotation; a first latch member on which the first pawls are provided; and a second latch member on which the second pawls are provided, the first latch member and the second latch member are respectively pivotally connected to the swing assembly via a fifth shaft, and the first latch member and the second latch member are respectively driven to be rotationally displaced with the fifth shaft as the center of rotation.

19. The ratchet clamp according to claim 18, wherein the first wrench member has a first protrusion for being embedded into a first indentation of the first latch member, the trigger has a trigger protrusion for being embedded into a second indentation of the second latch member, the first protrusion toggles the first latch member within the first indentation to be rotationally displaced and the trigger protrusion toggles the second latch member within the second indentation to be rotationally displaced when the first wrench member and the trigger member are rotationally displaced.

20. The ratchet clamp according to claim 18, wherein the first latch member further comprises the plurality of first pawls, the second latch member further comprises the plurality of second pawls, the first latch member and the second latch member are provided in parallel with each other, so that the plurality of first pawls and the plurality of second pawls are misaligned with each other, the plurality of first pawls each have a first pawl tip end and a first pawl groove end, the plurality of second pawls each have a second pawl tip end and a second pawl groove end, each of the first pawl tip ends and each of the second pawl groove ends are in parallel with each other, and each of the first pawl groove ends and each of the second pawl tip ends are in parallel with each other.

21. The ratchet clamp according to claim 4, wherein the control assembly comprises: a first wrench member; a first trigger member which is juxtaposed at the side of the first wrench member and is smaller than the first wrench member, the first wrench member and the trigger member are respectively pivotally connected to the swing assembly via a fourth shaft, and the first wrench member and the trigger member are respectively driven to be rotationally displaced with the fourth shaft as the center of rotation; a second trigger member which is juxtaposed at the side of the first wrench member and is smaller than the first wrench member, the first wrench member and the second trigger member are pivotally connected to the swing assembly via a fourth shaft, respectively, the first wrench member and the second trigger member are respectively driven to be rotationally displaced with the fourth shaft as the center of rotation; a first latch member on which the first pawls are provided; a second latch member on which the second pawls are provided; and a third latch member on which the third pawls are provided, the first latch member, the second latch member and the third latch member are respectively pivotally connected to the swing assembly via a fifth shaft, and the first latch member, the second latch member and the third latch member are respectively driven to be rotationally displaced with the fifth shaft as the center of rotation.

22. The ratchet clamp according to claim 21, wherein the first trigger member has a first protrusion for being embedded into a first indentation of the first latch member, the second trigger member has a second protrusion for being embedded into a second indentation of the second latch member, the first wrench member has a trigger protrusion for being embedded into a third indentation of the third latch member, the first protrusion toggles the first latch member within the first indentation to be rotationally displaced, the second protrusion toggles the second latch member within the second indentation to be rotationally displaced, and the trigger protrusion toggles the third latch member within the third indentation to be rotationally displaced, when the first wrench member as well as the first trigger member and the second trigger member are rotationally displaced.

23. The ratchet clamp according to claim 21, wherein the first latch member further comprises the plurality of first pawls, the second latch member further comprises the plurality of second pawls, the third latch member further comprises the plurality of third pawls; the plurality of first pawls, the plurality of second pawls and the plurality of third pawls are misaligned with each other when the first latch member, the second latch member and the third latch member are provided in parallel with each other, the plurality of first pawls each have a first pawl tip end and a first pawl groove end, the plurality of second pawls each have a second pawl tip end and a second pawl groove end, and the plurality of third pawls each have a third pawl tip end and a third pawl groove end, each of the first pawl tip ends and each of the second pawl groove ends are in parallel with each other, and each of the first pawl groove ends and each of the second pawl tip ends are in parallel with each other.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0028] FIG. 1 is a front view of a ratchet clamp in accordance with the first embodiment of the present invention;

[0029] FIG. 2 is a cross-sectional view of a ratchet clamp in accordance with the first embodiment of the present invention;

[0030] FIG. 3 is an exploded view of a ratchet clamp in accordance with the first embodiment of the present invention;

[0031] FIG. 4 is an exploded view of a ratchet toothed assembly and a control assembly in accordance with the first embodiment of the present invention;

[0032] FIG. 5 is an engagement schematic view of a ratchet toothed assembly and a control assembly in accordance with the first embodiment of the present invention;

[0033] FIGS. 6 and 7 are action schematic views of a ratchet clamp in accordance with the first embodiment of the present invention;

[0034] FIG. 8 is an exploded view of a ratchet toothed assembly and a control assembly in accordance with the second embodiment of the present invention;

[0035] FIG. 9 is an engagement schematic view of a ratchet toothed assembly and a control assembly in accordance with the second embodiment of the present invention;

[0036] FIG. 10 is an exploded view of a ratchet toothed assembly and a control assembly in accordance with the third embodiment of the present invention;

[0037] FIG. 11 is an engagement schematic view of a ratchet toothed assembly and a control assembly in accordance with the third embodiment of the present invention;

[0038] FIG. 12 is an exploded view of a ratchet toothed assembly and a control assembly in accordance with the fourth embodiment of the present invention;

[0039] FIG. 13 is an engagement schematic view of a ratchet toothed assembly and a control assembly in accordance with the fourth embodiment of the present invention;

[0040] FIG. 14 is a schematic view of the engaged side of a misaligned locking mechanism of the present invention; and

[0041] FIG. 15 is a schematic view of the released side of a misaligned locking mechanism of the present invention;

[0042] wherein: [0043] 10 clamping mechanism [0044] 11 first clamping arm [0045] 12 second clamping arm [0046] 13 connecting shaft [0047] 131 torsion spring [0048] 14 jaw [0049] 15 first shaft [0050] 16 second shaft [0051] 17 third shaft [0052] 18 fourth shaft [0053] 19 fifth shaft [0054] 20 swing assembly [0055] 21 guide groove [0056] 22 receiving groove [0057] 23 opening [0058] 30 ratchet toothed assembly [0059] 31 first rack [0060] 311 first ratchet tooth [0061] 311a first ratchet tooth tip end [0062] 311b first ratchet tooth groove end [0063] 312 second ratchet tooth [0064] 312a second ratchet tooth tip end [0065] 312b second ratchet tooth groove end [0066] 32 second rack [0067] 321 second ratchet tooth [0068] 321a second ratchet tooth tip end [0069] 321b second ratchet tooth groove end [0070] 33 third rack [0071] 331 third ratchet tooth [0072] 40 control assembly [0073] 41 first wrench member [0074] 411 first protrusion [0075] 412 trigger end of the first wrench member [0076] 42 second wrench member [0077] 421 second protrusion [0078] 43 first latch member [0079] 431 first indentation [0080] 432 first pawl [0081] 432a first pawl tip end [0082] 432b first pawl groove end [0083] 433 second pawl [0084] 433a second pawl tip end [0085] 433b second pawl groove end [0086] 44 second latch member [0087] 441 second indentation [0088] 442 second pawl [0089] 442a second pawl tip end [0090] 442b second pawl groove end [0091] 45 trigger member [0092] 451 trigger protrusion [0093] 46 third latch member [0094] 47 second trigger member [0095] 50 elastic component

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0096] FIGS. 1 and 2 show that configuration of the first embodiment of the ratchet clamp according to the present invention includes a clamping mechanism and a ratchet mechanism. The clamping mechanism 10 is formed of a first clamping arm 11 and a second clamping arm 12 connected to each other via a connecting shaft 13, and the connecting shaft is sleeved with a torsion spring 131, the two ends of the torsion spring 131 abut against the first clamping arm 11 and the second clamping arm 12, respectively, and the first clamping arm 11 and the second clamping arm 12 control opening or closing of a jaw 14 with the connecting shaft 13 as the center of rotation. Specifically, when the first clamping arm 11 and the second clamping arm 12 are operated to be moved towards each other, the jaw 14 can be gradually reduced and the torsion spring 131 is subjected to a force to be elastically deformed and the position of the jaw 14 is then fixed by the ratchet mechanism, so that the first clamping arm 11 and the second clamping arm 12 produce a desired clamping force, thereby clamping an article such as a workpiece. When the first clamping arm 11 and the second clamping arm 12 are operated to be moved away from each other, the ratchet mechanism needs to be firstly disengaged, and the jaw 14 is gradually enlarged by means of elastic reset force of the torsion spring 131, in this way the clamped workpiece is released.

[0097] As shown in FIG. 3, the ratchet mechanism includes a swing assembly 20, a ratchet toothed assembly 30, and a control assembly 40. The swing assembly 20 is pivotally connected to the second clamping arm 12 via a first shaft 15, and the swing assembly 20 can be braked through the first shaft 15 to be displaced along with the second clamping arm 12 when the second clamping arm 12 reciprocally moves relative to the first clamping arm 11.

[0098] The swing assembly 20 has a guide groove 21, a receiving groove 22, and an opening 23. The guide groove 21 is formed on one side of the swing assembly 20 for the ratchet toothed assembly 30 to slide therein. The receiving groove 22 is formed on the other side of the swing assembly 20 for the control assembly 40 to be pivotally provided therein. In addition, the opening 23 is provided between the guide groove 21 and the receiving groove 22 for the guide groove 21 and the receiving groove 22 to communicate with each other.

[0099] As shown in FIGS. 4 and 5, the ratchet toothed assembly 30 has a first rack 31 and a second rack 32 which are in parallel with each other, and the first rack 31 and the second rack 32 are both arcuate strip-shaped, the arc center points of the two racks 31, 32 coincide with the circle center of the connecting shaft 13, and the guide groove 21 of the swing assembly 20 also matches the shape of the two arcuate strip-shaped racks 31, 32, so that the guide groove 21 is also arc-shaped. In this way, both the first rack 31 and the second rack 32 can both slide therein along the guide groove 21.

[0100] The outer arc surface of the first rack 31 has a plurality of first ratchet teeth 311 and the second rack 32 also has a plurality of second ratchet teeth 321 on the outer arc surface thereof. Each of the first ratchet teeth 311 and each of the second ratchet teeth 321 are misaligned with each other when the first rack 31 and the second rack 32 are in parallel with each other. Specifically, the plurality of first ratchet teeth 311 each have a first ratchet tooth tip end 311a and a first ratchet tooth groove end 311b, and the plurality of second ratchet teeth 321 also each have a second ratchet tooth tip end 321a and a second ratchet tooth groove end 321b, and the first ratchet tooth tip ends 311a are juxtaposed with the second ratchet tooth groove ends 321b and the first ratchet tooth groove ends 311b are juxtaposed with the second ratchet tooth tip ends 321a, with the staggered structure design, the ratchet teeth 311, 321 of the juxtaposed two racks 31, 32 can be misaligned with each other.

[0101] The ratchet tooth 311, 321 of the two racks 31, 32 are exposed in the receiving groove 22 through the opening 23 when the first rack 31 and the second rack 32 of the ratchet toothed assembly 30 are placed into the guide groove 21 together. When the first rack 31 and the second rack 32 are pivotally connected to the first clamping arm 11 via a second shaft 16 and a third shaft 17, respectively, the ratchet toothed assembly 30 can be braked through the second shaft 16 and the third shaft 17 to be displaced along with the first clamping arm 11 and reciprocally slide in the guide groove 21 of the swing assembly 20, so that the ratchet tooth 311, 321 of the two racks 31, 32 can be reciprocally moved together in the receiving groove 22, respectively.

[0102] The control assembly 40 has a first wrench member 41, a second wrench member 42, a first latch member 43, and a second latch member 44. The first wrench member 41 and the second wrench member 42 are respectively located in the receiving groove 22 of the swing assembly 20, and the first wrench member 41 and the second wrench member 42 are pivotally connected to the swing assembly 20 via a fourth shaft 18, respectively, and the first wrench member 41 and the second wrench member 42 are respectively driven to be wrenchingly displaced with the fourth shaft 18 as the center of rotation. In addition, a first protrusion 411 is provided at the front end of the first wrench member 41, and a second protrusion 421 is also provided at the front end of the second wrench member 42.

[0103] The first latch member 43 and the second latch member 44 are respectively located in the receiving groove 22 of the swing assembly 20, and the first latch member 43 and the second latch member 44 are pivotally connected to the swing assembly 20 via a fifth shaft 19, respectively, and the first latch member 43 and the second latch member 44 are respectively driven to rotate with the fifth shaft 19 as the center of rotation. The first latch member 43 has a first indentation 431 and a plurality of first pawls 432, the first indentation 431 is used for the first protrusion 411 of the first wrench member 41 to be embedded therein, and each of the first pawls 432 can be correspondingly engaged into each of the first ratchet teeth 311 of the first rack 31, respectively.

[0104] The second latch member 44 also has a second indentation 441 and a plurality of second pawls 442, and the second indentation 441 is used for the second protrusion 421 of the second wrench member 42 to be embedded therein, and each of the second pawls 442 can be correspondingly engaged into each of the second ratchet teeth 321 of the second rack 32, respectively.

[0105] It is to be noted that, each of the first pawls 432 and each of the second pawls 442 are misaligned with each other when the first latch member 43 and the second latch member 44 are in parallel with each other. Specifically, the plurality of first pawls 432 each have a first pawl tip end 432a and a first pawl groove end 432b, and the plurality of second pawls 442 also each have a second pawl tip end 442a and a second pawl groove end 442b, and the first pawl tip ends 432a are juxtaposed with the second pawl groove ends 442b, and the first pawl groove ends 432b are juxtaposed with the second pawl tip ends 442a, with the staggered structure design, the plurality of pawls 432, 442 of the two juxtaposed latch members 43, 44 can be misaligned with each other.

[0106] As shown in FIGS. 6 and 7, when a user operates the first clamping arm 11 and the second clamping arm 12 to move towards each other and clamps the clamped article, the torsion spring 131 is subjected to press by the two clamping arms 11, 12 to be elastically deformed, and the first pawls 432 of the first latch member 43 can be gradually skipped and be tightly engaged onto the corresponding first ratchet teeth 311 of the first rack 31, similarly, the second pawls 442 of the second latch member 44 are also gradually skipped and are tightly engaged onto the corresponding second ratchet teeth 321 of the second rack 32. Meanwhile, by means of elastic force provided by the elastic component 50, the first protrusion 411 of the first wrench member 41 is in the first indentation 431, the first latch member 43 is toggled to be normally held in the engaged position. And the second protrusion 421 of the second wrench member 42 is also in the second indentation 441, the second latch member 44 is toggled to be normally held in the engaged position. The clamping force of the two clamping arms 11, 12 can be maintained by the tight engagement between the two racks 31, 32 of the two latch members 43, 44.

[0107] In order to make the ratchet mechanism more stable and reliable, the first ratchet teeth 311 and the second ratchet teeth 321 are designed to be misaligned with each other, and complementing with the engagement of misaligned first pawls 432 and second pawls 442. As shown in FIGS. 14 and 15, only one pair of ratchet tooth and pawl is engaged when engaged, and the other pair is not engaged. Under the premise of the same jaw process, with the misaligned ratchet tooth design, the tooth profile may not be reduced to increase the structural strength. And with the design of the double rows of misaligned ratchet tooth, the number of teeth can be additionally increased in order to reduce the skipping angle, thereby reducing the tooth spaces and increasing the structural strength, so that the overall clamping force is greatly enhanced.

[0108] In addition, with the misaligned ratchet tooth design, the pawls 432, 442 of the two latch members 43, 44 can be reliably engaged onto the ratchet teeth 311, 321 of the two racks 31, 32, respectively, to ensure that the ratchet teeth 311, 321 and the pawls 432, 442 are able to skip normally when they reach the default value of the clamping force so as to control the degree of clamping force applied by the accurate clamping mechanism 10 to avoid the problems such as failing to skip smoothly, deviating easily, or breaking tooth due to abrasion when the clamping force reaches the default value.

[0109] When a user operates the first clamping arm 11 and the second clamping arm 12 to move away from each other and release the clamped article, the first wrench member 41 can be first operated to be rotationally displaced so that the first protrusion 411 of the first wrench member 41 is in the first indentation 431, the first latch member 43 is toggled from the engaged position to the released position so that each of the first pawls 432 of the first latch member 43 is moved away from the corresponding first ratchet tooth 311. Similarly, the second wrench member 42 is then operated to be rotationally displaced so that the second protrusion 421 of the second wrench member 42 is in the second indentation 441, the second latch member 44 is toggled from the engaged position to the released position so that each of the second pawls 442 of the second latch member 44 is moved away from the corresponding second ratchet tooth 321, but not limited to the above-described operation sequence, the user can also first operate the second wrench member 42 and then operate the first wrench member 41 to disengage so as to gradually release the clamping force, and can also synchronously operate the first wrench member 41 and the second wrench member 42 to disengage to release the clamping force all at once, and the above-mentioned operation sequences are not intended to limit the scope of the claims. After the two latch members 41, 42 are respectively moved to the released position, the two clamping arms 11, 12 are returned to the open position by means of elastic reset force of the torsion spring 131, and then performs the next clamping operation.

[0110] As shown in FIGS. 8 and 9, which are an exploded view and an engagement schematic view of the ratchet toothed assembly and the control assembly according to the second embodiment of the present invention, the specific implementations of which are generally the same as those of the first embodiment described above, only the differences will be explained below, and the same points will not be described again.

[0111] In this embodiment, the ratchet toothed assembly 30 has a first rack 31, and the first rack 31 is also arcuate strip-shaped, and the arc center point of the first rack 31 coincides with the circle center of the connecting shaft 13, and the guide groove 21 of the swing assembly 20 also matches the shape of the arcuate strip-shaped first rack 31, so that the guide groove 21 is also arcuate strip-shaped. In this way, the first rack 31 can slide therein along the guide groove 21.

[0112] The outer arc surface of the first rack 31 has a plurality of first ratchet teeth 311 and a plurality of second ratchet teeth 312 which are in parallel with each other, and each of the first ratchet teeth 311 and each of the second ratchet teeth 312 are misaligned with each other. Specifically, the plurality of first ratchet teeth 311 each have a first ratchet tooth tip end 311a and a first ratchet tooth groove end 311a, and the plurality of second ratchet teeth 312 also each have a second ratchet tip end 312a and a second ratchet tooth groove end 312b, and the first ratchet tooth tip ends 311a are juxtaposed with the second ratchet tooth groove ends 312b and the first ratchet tooth groove ends 311a are juxtaposed with the second ratchet tip ends 312a, with the staggered structure design, the juxtaposed two ratchet teeth 311, 312 can be misaligned with each other.

[0113] The control assembly 40 has a first wrench member 41 and a first latch member 43. The first wrench member 41 is located in the receiving groove 22 of the swing assembly 20, and the first wrench member 41 is pivotally connected to the swing assembly 20 via the fourth shaft 18, the first wrench member 41 is driven to be wrenchingly displaced with the fourth shaft 18 as the center of rotation. In addition, a first protrusion 411 is provided at the front end of the first wrench member 41.

[0114] The first latch member 43 is located in the receiving groove 22 of the swing assembly 20, and the first latch member 43 is pivotally connected to the swing assembly 20 via the fifth shaft 19, and the first latch member 43 is respectively driven to rotate with the fifth shaft 19 as the center of rotation. The first latch member 43 has a first indentation 431, a plurality of first pawls 432 and a plurality of second pawls 433, and the first indentation 431 is used for a first protrusion 411 of the first wrench member 41 to be embedded therein. Each of the first pawls 432 can be correspondingly engaged into each of the first ratchet teeth 311 on the first rack 31, respectively, and each of the second pawls 433 is engaged into each of the second ratchet teeth 321 on the second rack 32.

[0115] It is to be noted that each of the first pawls 432 and each of the second pawls 433 of the first latch member 43 are misaligned with each other. Specifically, the plurality of first pawls 432 each have a first pawl tip end 432a and a first pawl groove end 432b, and the plurality of second pawls 433 also each have a second pawl tip end 433a and a second pawl groove end 433b, and the first pawl tip ends 432a are juxtaposed with the second pawl groove ends 433b, and the first pawl groove ends 432b are juxtaposed with the second pawl tip ends 433a, with the staggered structure design, the two rows of the plurality of pawls 432, 433 of the first latch members 43 can be misaligned with each other.

[0116] When a user operates the first clamping arm 11 and the second clamping arm 12 to move towards each other and clamp the clamped article, the torsion spring 131 is subjected to press by the two clamping arms 11, 12 to be elastically deformed, the first pawls 432 of the first latch member 43 can be gradually skipped and be tightly engaged onto the corresponding first ratchet teeth 311 of the first rack 31, similarly, the second pawls 433 of the first latch member 43 are also gradually skipped and are tightly engaged onto the corresponding second ratchet teeth 321 of the second rack 32. Meanwhile, by means of elastic reset force of the elastic component 50, the first protrusion 411 of the first wrench member 41 is in the first indentation 431, the first latch member 43 is toggled to be normally held in the engaged position, so that the clamping force of the two clamping arms 11, 12 can be maintained.

[0117] When a user operates the first clamping arm 11 and the second clamping arm 12 to move away from each other and release the clamped article, the first wrench member 41 can be first operated to be rotationally displaced so that the first protrusion 411 of the first wrench member 41 is in the first indentation 431, the first latch member 43 is toggled from the engaged position to the released position so that each of the first pawls 432 of the first latch member 43 is moved away from the corresponding first ratchet teeth 311, and each of the second pawls 433 of the first latch member 43 is synchronously moved away from the corresponding second ratchet teeth 312. After the first latch member 43 is moved to the released position, the two clamping arms 11, 12 are returned to the open position by means of elastic reset force of the torsion spring 131, and then performs the next clamping operation.

[0118] As shown in FIGS. 10 and 11, which are an exploded view and an engagement schematic view of the ratchet toothed assembly and the control assembly according to the third embodiment of the present invention, the implementations of which are generally the same as those of the first embodiment described above, only the differences will be explained below, and the same points will not be described again. In this embodiment, the control assembly 40 has a first wrench member 41 and a trigger member 45, and the trigger member 45 is juxtaposed at the side of the first wrench member 41. When assembled, the first wrench member 41 and the trigger member 45 are mounted in the receiving groove 22 of the swing assembly 20, respectively, and the first wrench member 41 and the trigger member 45 are pivotally connected to the swing assembly 20 via the fourth shaft 18, respectively, and the first wrench member 41 and the trigger member 45 are respectively driven to be wrenchingly displaced with the fourth shaft 18 as the center of rotation. In addition, a first protrusion 411 is provided at the front end of the first wrench member 41, and a trigger protrusion 451 is also provided at the front end of the trigger member 45.

[0119] With the structure design of the trigger member 45, when a user wants to operate the ratchet mechanism to disengage, the user can first wrench the first wrench member 41 to be rotationally displaced so that the first protrusion 411 of the first wrench member 41 is the first indentation 431, the first latch member 43 is toggled from the engaged position to the released position so that each of the first pawls 432 of the first latch member 43 is moved away from the corresponding first ratchet teeth 311. Thereafter, in the actions similar to pulling the trigger, the trigger member 45 is pressed by the index finger so that the trigger protrusion 451 of the trigger member 45 is in the second indentation 441, the second latch member 44 is toggled from the engaged position to the released position so that each of the second pawls 442 of the second latch member 44 is moved away from the corresponding second ratchet teeth 321, thereby gradually releasing the clamping force of the clamping mechanism 10.

[0120] As shown in FIGS. 12 and 13, which are an exploded view and an engagement schematic view of the ratchet toothed assembly and the control assembly according to the fourth embodiment of the present invention, the specific implementations of which are generally the same as those of the third embodiment described above; only the differences will be explained below, and the same points will not be described again. In this embodiment, the control assembly 40 has a first wrench member 41 and a trigger member 45 and a second trigger member 47, and the trigger member 45 and the second trigger member 47 are juxtaposed at the side of the first wrench member 41. When assembled, the first wrench member 41 and the trigger member 45 and the second trigger member 47 are mounted in the receiving groove 22 of the swing assembly 20, respectively, and the first wrench member 41 and the trigger member 45 and the second trigger member 47 are pivotally connected to the swing assembly 20 via the fourth shaft 18, respectively, and the first wrench member 41 and the trigger member 45 and second trigger member 47 are respectively driven to be wrenchingly displaced with the fourth shaft 18 as the center of rotation. In addition, a first protrusion 411 and a first wrench member trigger end 412 having the same shape as the trigger member 45 and the second trigger member 47 are provided at the front end of the first wrench member 41, and a trigger protrusion 451 is also provided at the front end of the trigger member 45.

[0121] With the structure design of the trigger member 45, when a user wants to operate the ratchet mechanism to disengage, the user can first wrench the first wrench member to be rotationally displaced so that the first protrusion 411 of the first wrench member 41 is in the indentation 431, the first latch member 43 is toggled from the engaged position to the released position so that each of the first pawls 432 of the first latch member 43 is moved away from the corresponding first ratchet teeth 311. Thereafter, in the actions similar to pulling the trigger, the trigger member 45 is pressed by the index finger so that the trigger protrusion 451 of the trigger member 45 is in the second indentation 441, the second latch member 44 is toggled from the engaged position to the released position so that each of the second pawls 442 of the second latch member 44 is moved away from the corresponding second ratchet teeth 321, thereby gradually releasing the clamping force of the clamping mechanism 10.

[0122] In view of the above, the ratchet clamps disclosed in accordance with all of the embodiments of the present invention described above, with the design of two rows of ratchet teeth which are juxtaposed and are misaligned with each other, allows the double rows of misaligned ratchet teeth to maintain the original structural strength without reducing the tooth profile, and increases the number of the ratchet teeth with the design of double rows of misaligned ratchet teeth, thereby reducing the tooth spaces when engaged, to increase the overall engagement area, for dispersing the force applied on the ratchet tooth. It is ensured that the ratchet tooth and the pawls are able to skip normally when they reach the default value of the clamping force so as to control the degree of clamping force applied by the accurate clamp mechanism to avoid the problems such as failing to skip smoothly, deviating easily, or breaking tooth due to abrasion when the clamping force reaches the default value.

[0123] The specific embodiments of the invention have been described in detail in the above implementations. It is to be understood that numerous modifications and variations can be made by those skilled in the art to which the present invention pertains in accordance with the technical concepts of the present invention once the above-mentioned technical concepts, specific embodiments and effects of the present invention are appreciated. Hence, the technical solutions that can be derived by those skilled in the art according to the technical concepts of the present invention on the basis of the prior art through logical analysis, reasoning and limited experiments should be within the scope of protection defined by the claims.