CORD PACKAGING DEVICE, ELASTIC JOINT DISK AND METHOD FOR PRODUCING AN ELASTIC JOINT DISK

Abstract

A cord package supporting device for supporting a cord package wound with a cord, such as for an elastic joint disk for connecting two shaft portions, is disclosed. The cord package includes two opposite arcuate cord regions and two tangential cord regions that connect the arcuate cord regions to each other and extend parallel to each other. In embodiments, the cord package supporting device includes a first redirecting portion and a second redirecting portion, about which in each case one arcuate cord region of the cord package is guided. In embodiments, the two redirecting portions are integrally connected to each other via a web. An elastic joint disc and a method for producing an elastic joint disc are also disclosed.

Claims

1. A cord package supporting device for supporting a cord package wound with a cord for an elastic joint disk for connecting two shaft portions, wherein the cord package has two opposite arcuate cord regions and two tangential cord regions that connect the arcuate cord regions to each other and extend parallel to each other, wherein the cord package supporting device has a first redirecting portion and a second redirecting portion, about which in each case one arcuate cord region of the cord package is guided, and wherein the two redirecting portions are integrally connected to each other via a web.

2. The cord package supporting device according to claim 1, wherein the web can be detached from the redirecting portions.

3. The cord package supporting device according to claim 2, wherein each of the redirecting portions has at least one depositing region for depositing the cord package supporting device for detaching the web.

4. The cord package supporting device according to claim 1, wherein each of the redirecting portions has two opposite collar portions that accommodate the cord package between them and axially support the cord package.

5. The cord package supporting device according to claim 4, wherein a distance between the opposite collar portions in the region of a tangential cord guidance increases steadily.

6. The cord package supporting device according to claim 1, wherein each redirecting portion has an arcuate cord guiding region around which an arcuate cord region is guided, and two tangential cord guiding regions, wherein each of the tangential cord guiding regions guides a portion of a tangential cord region.

7. The cord package supporting device according to claim 1, wherein each of the redirecting portions has a through-hole for pressing in a bushing and a ridge portion for fastening the web.

8. The cord package supporting device according to claim 1, wherein an elastomer body which partially encases the cord package supporting device.

9. The cord package supporting device according to claim 1, wherein the redirecting portions and the web are produced integrally by injection molding.

10. The cord package supporting device according claim 1, wherein the two redirecting portions and the web are produced from a plastic, in particular from a fiber reinforced plastic.

11. An elastic joint disk for connecting two shaft portions, comprising a plurality of cord package supporting devices according to claim 1, a plurality of cord packages and a plurality of bushings, wherein one cord package in each case is wrapped around a cord package supporting device, wherein each cord package supporting device wrapped with a cord package is at least partially encased by an elastomer body, and wherein one bushing in each case connects two cord package supporting devices to each other.

12. A method for producing an elastic joint disk for connecting two shaft portions, the method comprising: providing a plurality of cord package supporting devices, wherein each cord package supporting device comprises two redirecting portions and a web integrally connecting the two redirecting portions to each other, and wherein each redirecting portion has a through-hole for pressing in a bushing; winding a cord around each of the cord package supporting devices to produce a cord package on each of the cord package supporting devices; partially encasing each of the cord package supporting devices with an elastomer body; and connecting the cord package supporting devices, which are partially encased with an elastomer body, to each other by means of a plurality of bushings to form a joint disk, by one bushing in each case being pressed into the through-holes of two cord package supporting devices.

13. A method for producing an elastic joint disk for connecting two shaft portions, the method comprising: providing a plurality of cord package supporting devices, wherein each cord package supporting device comprises two redirecting portions and a web integrally connecting the two redirecting portions to each other, and wherein each redirecting portion has a through-hole for pressing in a bushing; winding a cord around each of the cord package supporting devices to produce a cord package on each of the cord package supporting devices; connecting the cord package supporting devices to each other by means of a plurality of bushings to form a joint disk basic body, by one bushing in each case being pressed into the through-holes of two cord package supporting devices; and partially encasing each of the cord package supporting devices with an elastomer body.

14. The method according to claim 12, wherein the web is detached from the redirecting portions after each of the cord package supporting devices has been partially encased with an elastomer body.

15. The method according to claim 12, wherein the cord package supporting devices are coated.

16. The cord package supporting device according claim 15, wherein the cord package supporting devices are coated prior to winding the cord.

17. The cord package supporting device according claim 10, wherein the plastic comprises fiber reinforced plastic.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The cord package supporting device, the joint disk, the methods for producing a joint disk and further features and advantages are explained in more detail with reference to an exemplary embodiment, which is schematically shown in the Figures. In the Figures:

[0027] FIG. 1 shows a perspective view of an elastic joint disk;

[0028] FIG. 2 shows a perspective view of a cord package supporting device;

[0029] FIG. 3 shows a top view of the cord package supporting device shown in FIG. 2;

[0030] FIG. 4 shows a side view of the cord package supporting device shown in FIG. 2;

[0031] FIG. 5 shows a perspective illustration of the cord package supporting device shown in FIG. 2, with a cord package;

[0032] FIG. 6 shows a perspective view of the cord package supporting device shown in FIG. 5, with an elastomer body; and

[0033] FIG. 7 shows a perspective view of the cord package supporting device shown in FIG. 6, with a detached web.

DETAILED DESCRIPTION

[0034] An elastic joint disk 10, which serves for connecting two shaft portions of a joint shaft of a motor vehicle that are not shown, is shown in FIG. 1.

[0035] The joint disk 10 includes a plurality of cord package supporting devices 12 partially encased by an elastomer body 14 and a plurality of bushings 16 which in each case connect two cord package supporting devices 12 to each other.

[0036] As is apparent from the FIGS. 2 to 4, the cord package supporting device 12 has a first redirecting portion 18 and a second redirecting portion 20 integrally connected to each other via a web 22. The cord package supporting device 12 is integrally produced from a plastic, particularly a fiber reinforced plastic, by means of the injection-molding method.

[0037] Each of the redirecting portions 18, 20 includes an arcuate cord guiding region 19, two tangential cord guiding regions 21, a through-hole 24 for pressing in a portion of a bushing 16, and a ridge portion 26 to which the web 22 is fastened. Furthermore, each of the redirecting portions 18, 20 has two opposing collar portions 28a, 28b that protrude radially outward from the redirecting portions 18, 20 and define a guiding region 30 between them.

[0038] According to FIG. 5, a cord 32 is wound around the cord package supporting device 12 in order to produce a cord package 34, wherein the cord package 34 is guided within the guiding region 30 defined by the collar portions 28a, 28b. The two collar portions 28a, 28b thus prevent the cord package 34 from slipping off the cord package supporting device 12.

[0039] The cord package 34 has two opposite arcuate cord regions 36 and two tangential cord regions 38 that connect the arcuate cord regions 36 to each other and extend parallel to each other. In this case, the arcuate cord region 36 is guided around the arcuate cord guiding region 19, and one portion of one of the tangential cord regions 38 in each case abuts against one of the tangential cord guiding regions 21.

[0040] As is apparent particularly from the FIGS. 4 and 5, a distance a between the opposite collar portions 28a, 28b in the tangential cord guiding regions 21 increases steadily. In particular, the two collar portions 28a, 28b form a funnel-shaped opening angle for the tangential cord region 38.

[0041] In the arcuate cord guiding regions 19, the distance a between the collar portions 28a, 28b is constant. As a result, the free cord length in the arcuate cord region 36 is increased.

[0042] Compared to the two ridge portions 26, the web 22 has a smaller axial extent and can be detached, in particular punched, from the two ridge portions 26. The detachment or punching of the web 22 takes place when the cord package supporting device 12 is partially encased by the elastomer body 14. A cord package supporting device 12 with a detached web 22 is shown in FIG. 7.

[0043] For detaching the web 22, the ridge portions 26 have a depositing region 40 for depositing the cord package supporting device 12. For this purpose, the cord package supporting device 12 is inserted into a punching device, which is not shown, in such a manner that the cord package supporting device 12 is supported on its depositing region 40.

[0044] By detaching the web 22, the two redirecting portions 18, 20 can be moved relative to one another. Due to the funnel-shaped opening angles, large articulation angles can be realized, particularly in the area of the tangential cord regions 38. Furthermore, if the web 22 is detached, the ridge portions 26 act as stops 42 in the case of large deflections. The deflection can be adjusted by the shaping of the ridge portions 26.

[0045] A possible method for producing the joint disk 10 is explained below. First, six cord package supporting devices 12 are provided and pre-treated, in particular coated, for this purpose. Then, each cord package supporting device 12 is separately inserted into a winding machine, which is not shown. Subsequently, a cord 32 is wound around each cord package supporting device 12 in the winding machine in order to produce a cord package 34 as it is shown in FIG. 5. Then, the cord package supporting devices 12, together with the cord package 34, are inserted into a vulcanization mold and partially overmolded with an elastomer material, and then vulcanized in order to produce the elastomer body 14, as this is shown in FIG. 6. Then, the cord package supporting devices 12 partially encased with the elastomer body 14 are cooled off. Subsequently, the web 22 is detached, in particular punched away. For this purpose, the cord package supporting device 12 is inserted into a punching device, which is not shown, in such a manner that the cord package supporting devices 12 are supported on their depositing regions 40. Then, the cord package supporting devices are positioned in such a way as is shown in FIG. 1, so that the through-holes 24 of two cord package supporting devices 12 lying one on top of the other are aligned. Finally, the bushings 16 are pressed into the through-holes 24 in order to connect the cord package supporting devices 12 to each other to form a joint disk 10.

[0046] Moreover, the above-described method for producing the rubber joint disc may also be modified in such a way that the cord package supporting devices 12, around which a cord package 34 is wound, are first connected to each other by means of the bushings 16 to form a joint disk basic body, and then, the joint disk basic body is inserted into a vulcanization mold in order to partially encase the individual cord package supporting devices 12 with the elastomer body 14. Lastly, the webs 22 are then detached, in particular punched away.