Constant velocity joint

Patent metadata

Field	Value
Publication number	US-12498000-B2
Application number	US-202318123469-A
Country	US
Kind code	B2
Filing date	Mar 20, 2023
Priority date	Apr 7, 2022
Publication date	Dec 16, 2025
Grant date	Dec 16, 2025

Abstract

A constant velocity joint includes an outer part having an opening and a plurality of axially extending race grooves in the opening, an inner part at least partially located in the opening and having an outer surface with a plurality of axially extending race grooves, and a plurality of balls located between in inner and outer parts in the grooves. A first subset of the race grooves in the outer part and/or a first subset the race grooves in the inner part includes a section that follows a curved path in the axial direction.

First claim

What is claimed is:

1 . A constant velocity joint, comprising:
a joint outer part having a connecting side configured to connect to a first shaft and an opening side having an opening and a plurality of axially extending race grooves in the opening; a joint inner part at least partially located in the opening, the joint inner part including an outer surface having a plurality of axially extending race grooves; and a plurality of balls between the joint inner part and the joint outer part, each of the plurality of balls being located partly in one of the plurality of race grooves of the joint outer part and partly in one of the plurality of race grooves of the joint inner part, wherein a first subset of the plurality of race grooves of the joint outer part and a first subset the plurality of race grooves of the joint inner part includes a first section that follows a first curved path in the axial direction, wherein the first subset of the plurality of race grooves of the joint outer part and the first subset of the plurality of raceways of the joint inner part include a second section that follows a second curved path in the axial direction, wherein the first curved path has a first curvature and the second curved path has a second curvature opposite the first curvature, and wherein the first subset of the plurality of race grooves of the joint outer part and the first subset of the plurality of race grooves of the joint inner part include a linear third section.

2 . The constant velocity joint according to claim 1 ,
wherein the third section is located between the first section and the second section.

3 . The constant velocity joint according to claim 1 ,
wherein a curvature change from the first section to the second section is +/−5° about a working angle of 0°.

4 . The constant velocity joint according to claim 1 ,
wherein a greatest difference between a tangent of the first curved path and a tangent of the second curved path is less than or equal to 10°.

5 . The constant velocity joint according to claim 4 , wherein a greatest difference between the tangent of the first curved path and an edge of the linear third section is +/−5°.

6 . The constant velocity joint according to claim 1 ,
wherein the first path is mirror inverted relative to the second path.

7 . The constant velocity joint according to claim 1 ,
wherein the first curvature is complementary to the second curvature.

Assignees

• Skf Ab

Inventors

• Schmitz Tom

Classifications

• F16D3/2233 Primary

  where the track is made up of two curves with a point of inflexion in between, i.e. S-track joints · CPC title

• F16D3/223 Primary

  the rolling members being guided in grooves in both coupling parts · CPC title

• Y10S464/906

  Torque transmitted via radially spaced balls · CPC title

• F16D2003/22309

  Details of grooves · CPC title

• F16D2003/22313

  Details of the inner part of the core or means for attachment of the core on the shaft · CPC title