FIXING RING, AND ASSEMBLY OF A HOSE AND FIXING RING

Abstract

A fixing ring can be pushed onto a hose in such a way that its outside is freely accessible and an inside is in contact with the hose. The inside comprises a cylindrically shaped internal thread and the fixing ring comprises a holder with an inner diameter, which is smaller than the inner diameter of the internal thread.

This makes it possible, by means of a reliable process, to fasten a hose on a nozzle of a connector by means of a fixing ring producible in a simple manner.

Claims

1. A fixing ring (1), which can be screwed onto a hose (2) in such a way that its outside (3) is freely accessible and an inside (4) is in contact with the hose (2), wherein the inside (4) comprises a cylindrically shaped internal thread (5) and the fixing ring (1) comprises a holder (6) with an inner diameter (7) smaller than the inner diameter (8) of the internal thread (5).

2. The fixing ring according to claim 1, wherein it is in one piece.

3. The fixing ring according to claim 1, wherein the internal thread (5) is shaped in a partially conical manner.

4. The fixing ring according to claim 1, wherein it comprises a drive profile (15) on its outside (3).

5. The fixing ring according to claim 4, wherein the drive profile (15) comprises two parallel stop surfaces (16, 17) for an open-ended spanner.

6. The fixing ring according to claim 4, wherein the drive profile (32) comprises wings (33, 34) for screwing-on by hand.

7. The fixing ring according to claim 1, wherein it is manufactured from a plastic.

8. The fixing ring according to claim 1, wherein it comprises a conically tapering end (40), which serves as a holder (6).

9. The fixing ring according to claim 8, wherein a circumferential elevation (41) is arranged in the conically tapering end (40).

10. The fixing ring according to claim 9, wherein the elevation (41) comprises a ramp (43) on one side in extension direction (42) of the hose (2).

11. The fixing ring according to claim 10, wherein the ramp (43) falls away radially outwards in direction of the thread (5).

12. The fixing ring according to claim 10, wherein the ramp (63) rises radially inwards in direction of the thread (5).

13. The fixing ring according to claim 1, wherein it comprises at least one elastic hook (92 to 95).

14. The fixing ring according to claim 1, wherein it comprises a scale (110).

15. An arrangement comprising a hose (2) and the fixing ring (1) according to claim 1, wherein the outside (12) of the hose (2) is produced from a softer material (14) than the internal thread (5) of the fixing ring (1), wherein the hose (2) comprises a threadless surface (13) and wherein the fixing ring (1) is screwed onto the hose (2).

16. The arrangement according to claim 15, wherein the hose (2) is a PVC hose.

17. The arrangement according to claim 15, wherein the thread is cut at least partially into the hose.

18. The arrangement according to claim 15, wherein the thread, at least in sections, is not cut into the hose, but only pressed against the hose.

19. The arrangement according to claim 15, wherein a connector (10) is arranged in the hose (2).

20. The arrangement according to claim 19, wherein the connector (10) comprises at least one circumferential ramp (46).

21. The arrangement according to claim 19, wherein the connector (10) and the fixing ring (91) cooperate in a snap-in manner.

22. The arrangement according to claim 19, wherein a pointer (117) and a scale (110) are arranged on it in such a manner that when the fixing ring (111) is pushed onto the connector (113) the pointer (117) is moved relative to the scale (110).

23. A use of a screw with an at least partially conical internal thread as a fixing ring for fastening a hose (2) on a connector (10).

24. The use according to claim 23, wherein the internal thread is cut into the hose during the fastening.

Description

[0030] Advantageous variants are shown in the drawing and will now be explained in detail. In the drawing

[0031] FIG. 1 shows a three-dimensional view of a connector,

[0032] FIG. 2 shows a cut through the connector shown in FIG. 1

[0033] FIG. 3 shows an enlarged cut-out from FIG. 2,

[0034] FIG. 4 shows the cooperation between the fixing ring and a hose,

[0035] FIG. 5 shows, how the hose with the fixing ring is pressed against the nozzle of a connector,

[0036] FIG. 6 shows the back of the fixing ring shown in FIG. 1,

[0037] FIG. 7 shows a top view onto the fixing ring shown in FIG. 1,

[0038] FIG. 8 shows the front of the fixing ring shown in FIG. 1,

[0039] FIG. 9 shows a side view of the fixing ring shown in FIG. 1,

[0040] FIG. 10 shows cut-out B from FIG. 3,

[0041] FIG. 11 shows cut-out C from FIG. 3,

[0042] FIG. 12 shows an alternative embodiment with a hexagonal thread on the outside of the fixing ring,

[0043] FIG. 13 shows a fixing ring with wings as drive profile,

[0044] FIG. 14 shows an alternative variant of a fixing ring with two opposing ramps,

[0045] FIG. 15 schematically shows the arrangement of the ramps,

[0046] FIG. 16 shows a cut through the fixing ring shown in FIG. 1 on a hose in the region of a connector,

[0047] FIG. 17 shows a cut through an alternative embodiment of a fixing ring with double ramp,

[0048] FIG. 18 schematically shows the arrangement of the ramps,

[0049] FIG. 19 shows a cut through the fixing ring shown in FIG. 17 on a hose in the region of the connector,

[0050] FIG. 20 shows a cut through an alternative embodiment of a fixing ring with single ramp,

[0051] FIG. 21 schematically shows the construction of the ramp,

[0052] FIG. 22 shows a cut through the fixing ring shown in FIG. 20 on a hose in the region of the connector,

[0053] FIG. 23 shows a perspective view of a fixing ring with elastic hooks,

[0054] FIG. 24 shows a cut through the fixing ring shown in FIG. 23,

[0055] FIG. 25 shows a perspective view of a fixing ring with a scale and

[0056] FIG. 26 shows a cut through the fixing ring shown in FIG. 25.

[0057] The fixing ring shown in FIG. 1 can be pushed onto a hose 2 shown in FIGS. 4 and 5. Its outside 3 is freely accessible, whilst an inside 4 of the fixing ring 1 is in contact with the hose 2. This inside 4 has a cylindrically shaped internal thread 5. Moreover the fixing ring has a holder 6 with an inner diameter 7, which is smaller than the inner diameter 8 of the internal thread 5.

[0058] This fixing ring is constructed in one piece and can initially, as shown in FIG. 4, be pushed onto a hose 2 and then, as shown in FIG. 5, after the hose has been pushed onto a nozzle 9 of a connector 10, be screwed by rotation onto the hose at the hose end 11. During this process the thread 5 presses itself into the outside 12 of the hose 2, which comprises a threadless surface 13 and is made of a softer material 14 than the internal thread 5 of the fixing ring 1.

[0059] In the exemplary embodiment the internal thread 5 is shown as being cylindrical. It may however, at least partially, be conically shaped.

[0060] In the embodiment shown in FIGS. 1 to 11 the drive profile 15 for an open-ended spanner (not shown) is in the form of two stop surfaces 16, 17. In the embodiment shown in FIG. 12 two further stop surfaces 18, 19 are additionally provided, so that this fixing ring 20 has a hexagonal profile on its outside.

[0061] The fixing ring 30 shown in FIG. 13 comprises a drive profile 32 on its outside 31 with two wings 33 and 34 for screwing on by hand.

[0062] The holder 6 of the fixing ring 1 consists of a conically tapering end 40 with a circumferential elevation 41. This elevation 41, in the extension direction 42 of hose 2, comprises a ramp 43 on one side, which rises radially outwards in direction 44 of the thread 5.

[0063] The conically tapering end 40 thus presses the circumferential edge 45 into the hose 2 at the radially inner end of the ramp 43, in order to press the hose against the conical end 46 of the nozzle 9 of the connector 10. In the embodiment the conical end 36 of the nozzle has a circumferential oblique surface 47, which is arranged at an angle obliquely to the extension 42 of the hose 2. The ramp 43 of elevation 41 is arranged at an angle obliquely to the extension 42 of the hose 2. Since the angle is smaller than the angle , the ramp 43 presses the hose 2 against the circumferential conical surface 47 of the nozzle, thereby slightly penetrating into the outside 12 of the hose 2 in order to retain the hose.

[0064] FIG. 11 shows an enlarged view of the shape of the thread 5. The thread turns 50 are spaced apart. They have two parallel flanks 51, 52 and a trapeze-shaped inner surface 53. This special thread 2 retains the hose 2 and presses it against the nozzle 9 of the connector 10, without putting unnecessary stress on the hose.

[0065] An alternative embodiment of a holder 60 on the fixing ring 61 is shown in FIG. 14. This holder 60 has a first ramp 62, which, as the ramp 43, falls radially outwards away in direction of thread 5, and a second ramp 63, which rises radially inwards in direction of thread 5. With this arrangement the second ramp 63 in particular prevents withdrawal of the hose from the fixing ring 61.

[0066] A holder 70 on a fixing ring 71 shows a ramp 72 and a ramp 73 spaced apart from one another, the ramp 72 falling away radially outwards in direction of the thread 74 and the ramp 73 spaced further apart and rising radially inwards in direction of the thread 74.

[0067] Finally FIGS. 20 to 22 show a holder 80 on a fixing ring 81 with a ramp 82 which rises radially inwards in direction of the thread 84.

[0068] FIGS. 23 and 24 show a snap-in device 90 on a fixing ring 91, which comprises four snap-in hooks 92, 93, 94 and 95. These snap-in hooks are provided at the end 97 of the fixing ring 91 opposite the holder 96 and they cooperate in a snap-in manner as part of the fixing ring 91 with the connector 81. To this end the hooks 92 to 95 comprise an inclined plane 99, 100 (marked only by way of example), which during screwing-on of the fixing ring 91 onto the hose 101 presses the hooks 92 to 95 radially apart from one another. As soon as the hooks 92 to 95 enter the region of the stop surface 102 of the connector 98, they jump radially inwards in order to retain the fixing ring 91 on the connector 98.

[0069] FIGS. 25 and 26 show a scale 110 on a connector 113. To this end the fixing ring 111, in a partial region 112, was lengthened in direction of the connector 113, in order to be able, via markings 114, to read the relative position of the fixing ring 111 relative to the connector 113. The markings 114 may also be realised as grooves. The stop 102 or the circumferentially protruding ring 116 serves as pointer 117 on the scale 110.