Synchronizing joint

Patent metadata

Field	Value
Publication number	US-11879443-B2
Application number	US-201916658528-A
Country	US
Kind code	B2
Filing date	Oct 21, 2019
Priority date	Oct 22, 2018
Publication date	Jan 23, 2024
Grant date	Jan 23, 2024

Abstract

A joint for the angularly adjustable drive-connection of a cylinder block and a driveshaft of a hydrostatic bent axis piston unit. The joint has a shank which is rotatable about its longitudinal axis defining a joint axis, on both ends of the shank roller carriers project radially and basically perpendicular to the joint axis. On each roller carrier a roller is provided rotatable around a roller axis. The rollers are secured in axial direction against slipping-off of the roller carriers by means of an embossed area located axially outside of the roller on the respective distal end portion of the roller carrier.

First claim

What is claimed is:

1. A synchronizing joint for an angularly adjustable drive-connection of a cylinder block and a driveshaft of a hydrostatic bent axis piston unit,
wherein the synchronizing joint has a shank which is rotatable about its longitudinal axis defining a joint axis,
wherein on both ends of the shank roller carriers project radially and basically perpendicular to the joint axis,
wherein on each roller carrier a roller is provided rotatable around a roller axis, and
wherein the rollers are secured in axial direction against slipping-off of the roller carriers by means of an embossed area located axially outside of the roller on the respective distal end portion of the roller carrier,
wherein the embossed area includes material added to the distal end portion of the roller carrier,
wherein bores in the roller carriers extend transversely from the longitudinal bore in the shank, and
wherein radial bores extend from the transversely extending bores in the roller carriers such that lubrication fluid from the longitudinal bore in the shank is capable to be guided to the rollers.

2. The synchronizing joint according to claim 1 , wherein the embossed area is a welding point, a welding dash or a welding line along the circumferential direction of the roller carrier or a burr.

3. The synchronizing joint according to claim 1 , wherein the embossed area is brought up by means of soldering, welding, sputtering, gluing or any other technology increasing locally the diameter of the roller carrier.

4. The synchronizing joint according to claim 1 , wherein the synchronizing joint is embodied at least on one end as a tripod joint.

5. The synchronizing joint according to claim 1 , wherein at each axial end of the shank concave seats for receiving connecting pins are formed.

6. The synchronizing joint according to claim 1 , wherein the rollers are made of plastic material.

7. The synchronizing joint according to claim 1 , wherein the external circumferential surface of the rollers shows a convex shape.

8. The synchronizing joint according to claim 1 , wherein the roller carriers are integrally formed with the shank.

9. The synchronizing joint according to claim 1 , wherein the shank comprises a longitudinal bore capable to guide lubrication fluid along the joint axis.

10. A hydrostatic bent axis piston unit having a cylinder block and a driveshaft connected by synchronizing joint according to claim 1 , usable as hydrostatic bent axis piston pump or hydrostatic bent axis piston motor.

11. The hydrostatic bent axis piston unit according to claim 10 ,
wherein each end of the shank comprises a concave seat for receiving connection pins, and
wherein each end of the connection pins shows a convex or spherical head for being capable to support the synchronizing joint in an angular position with respect to the cylinder block axis and/or in angular position with respect to the driveshaft axis.

12. The hydrostatic bent axis piston unit according to claim 10 , wherein the connecting pins comprise through holes capable to guide lubrication fluid from the cylinder block to the longitudinal bore in the shank and from the shank to the driveshaft and vice versa.

13. The hydrostatic bent axis piston unit according to claim 12 , wherein radial bores in the driveshaft are capable to guide lubrication fluid from the connecting pins to shaft bearings rotatable supporting driveshaft in a housing of the hydrostatic bent axis piston unit.

14. The hydrostatic bent axis piston unit according to claim 10 , wherein the hydrostatic bent axis piston unit is of the variable adjustable displacement type of construction.

15. The hydrostatic bent axis piston unit according to claim 14 , wherein the cylinder block of the hydrostatic bent axis piston unit can be swivelled to positive and negative displacement angels by means of an adjustment unit.

16. A universal joint for an angularly adjustable drive-connection of two driveshafts,
having a shank which is rotatable about its longitudinal axis defining a joint axis,
wherein on at least one end of the shank a roller carrier projects radially and basically perpendicular to the joint axis,
wherein on the at least one roller carrier a roller is provided rotatable around a roller axis, and
wherein the roller is secured in axial direction of the roller axis against slipping-off of the roller carrier by means of an embossed area located axially outside of the roller on the distal end portion of the roller carrier,
wherein the roller carriers are integrally formed with the shank,
wherein bores in the roller carriers extend transversely from the longitudinal bore in the shank, and
wherein radial bores extend from the transversely extending bores in the roller carriers such that lubrication fluid from the longitudinal bore in the shank is capable to be guided to the rollers.

17. The universal joint according to claim 16 , wherein the embossed area is a welding point, a welding dash, a welding line or a burr along the circumferential direction of the roller carrier.

18. The universal joint according to claim 16 , wherein the embossed area is brought up by means of laser application, soldering, welding, sputtering, gluing or any other technology increasing locally the diameter of the roller carrier.

19. The universal joint according to claim 16 , wherein the universal joint is embodied at least on one end as a tripod joint.

20. The universal joint according to claim 16 , wherein at each axial end of the shank concave seats for receiving connecting pins are formed.

21. The universal joint according to claim 16 , wherein the rollers are made of plastic material.

22. The universal joint according to claim 16 , wherein the external circumferential surface of the rollers shows a convex shape.

23. The universal joint according to claim 16 , wherein the shank comprises a longitudinal bore capable to guide lubrication fluid along the joint axis.

Assignees

• Danfoss Power Solutions Gmbh & Co Ohg

Inventors

• Widderich Jan
• Marsch Hauke
• Dörntge Björn

Classifications

• F04B1/2085 Primary

  Bearings for swash plates or driving axles · CPC title

• F04B1/328

  by changing the inclination of the axis of the cylinder barrel relative to the swash plate · CPC title

• F16D3/205

  the pins extending radially outwardly from the coupling part · CPC title

• F16D3/2055 Primary

  having three pins, i.e. true tripod joints · CPC title

• F16D3/24

  comprising balls, rollers, or the like between overlapping driving faces, e.g. cogs, on both coupling parts · CPC title