Universal joint for a steering shaft of a motor vehicle

Patent metadata

Field	Value
Publication number	US-2022010843-A1
Application number	US-201917294440-A
Country	US
Kind code	A1
Filing date	Nov 21, 2019
Priority date	Nov 23, 2018
Publication date	Jan 13, 2022
Grant date	—

Abstract

A universal joint may include a joint cross having two pairs of journals arranged at right angles to one another and two joint yokes that each have opposing arms. Each journal may be rotatably mounted in the opposing arms about a journal axis in a journal bearing that has a pot-shaped outer bushing that is fixed in the respective arms and that has an outer pot base disposed opposite an end side of the journal. A convexly projecting contact region may contact the outer pot base. Further, an inner bushing may be fixed on the journal, and rolling bodies may be disposed between the inner bushing and the pot-shaped outer bushing. The convexly projecting contact region may project axially on the end side relative to a surface of the inner bushing that acts as a raceway for the rollable rolling bodies.

First claim

1 - 11 . (canceled)

12 . A universal joint for a steering shaft of a motor vehicle, the universal joint comprising:
a joint cross having two pairs of journals that are arranged at right angles to one another; and two joint yokes that are connectable to the steering shaft, each joint yoke having two mutually opposite arms, wherein in each of the arms one of the journals is rotatably mounted about a journal axis in a journal bearing, wherein each journal bearing includes a pot-shaped outer bushing that is fixed in the respective arm and has an outer pot base disposed opposite an end side of the respective journal, wherein each outer pot base is contacted by a convexly projecting contact region, wherein an inner bushing is fixed on each journal, wherein in each case rollable rolling bodies are disposed between the inner bushing and the pot-shaped outer bushing, wherein the convexly projecting contact region projects axially relative to a portion of the inner bushing that acts as a raceway for the rolling bodies.

13 . The universal joint of claim 12 wherein the inner bushing is pot shaped with an inner pot having an end-side inner pot base that includes the convexly projecting contact region.

14 . The universal joint of claim 13 wherein the convexly projecting contact region disposed on the inner pot is axially resilient.

15 . The universal joint of claim 13 wherein the convexly projecting contact region is configured as a spherical cap disposed on the end-side inner pot base.

16 . The universal joint of claim 15 wherein the end-side inner pot base is at least 50% planar outside of the convexly projecting contact region.

17 . The universal joint of claim 15 wherein the end-side inner pot base is axially spaced apart from the end side of the journal.

18 . The universal joint of claim 12 wherein the outer pot base is flat.

19 . The universal joint of claim 12 wherein the inner bushing includes an outwardly projecting flange portion.

20 . The universal joint of claim 12 wherein the pot-shaped outer bushing includes a radially projecting holding portion.

21 . The universal joint of claim 12 comprising a sealing element disposed between the pot-shaped outer bushing and the inner bushing.

22 . The universal joint of claim 12 wherein the inner bushing is connected to the journal by or in at least one of
a force-fitting manner,
a form-fitting manner, or
substance-to-substance bonding.

23 . The universal joint of claim 12 wherein the pot-shaped outer bushing is connected to the arm by or in at least one of
a force-fitting manner,
a form-fitting manner, or
substance-to-substance bonding.

24 . A universal joint comprising:
a joint cross having two pairs of journals that are arranged at right angles to one another; and two joint yokes, each joint yoke having opposing arms, wherein in each arm one of the journals is rotatably mounted about a journal axis in a journal bearing, wherein each journal bearing includes a pot-shaped outer bushing that is fixed in the respective arm and has an outer pot base disposed opposite an axial end side of the respective journal, wherein each outer pot base is contacted by a convexly projecting contact region of an inner bushing that is fixed on each journal, wherein in each case a rollable rolling body is disposed between the inner bushing and the pot-shaped outer bushing, wherein the convexly projecting contact region protrudes axially relative to the rolling body.

25 . The universal joint of claim 24 wherein the convexly projecting contact region protrudes axially relative to a portion of the inner bushing that acts as a raceway for the rolling body.

26 . The universal joint of claim 24 wherein the inner bushing is pot shaped with an inner pot having an end-side inner pot base that includes the convexly projecting contact region.

27 . The universal joint of claim 26 wherein the convexly projecting contact region disposed on the inner pot is axially resilient.

28 . The universal joint of claim 26 wherein the convexly projecting contact region is configured as a spherical cap disposed on the end-side inner pot base.

29 . The universal joint of claim 24 wherein a surface area of the end-side inner pot base outside of the convexly projecting contact region is at least 50% planar.

30 . The universal joint of claim 24 wherein the end-side inner pot base is axially spaced apart from the axial end side of the journal at a center of the end-side inner pot base.

31 . The universal joint of claim 24 comprising a sealing element disposed between the pot-shaped outer bushing and the inner bushing.

Assignees

• Thyssenkrupp Presta Ag
• Thyssenkrupp Ag

Inventors

• Eiswirth Maximilian
• Frick Stefan

Classifications

• F16C21/005

  the external zone of a bearing with rolling members, e.g. needles, being cup-shaped, with or without a separate thrust-bearing disc or ring, e.g. for universal joints (seals F16C33/72, F16D3/38) · CPC title

• F16C19/46

  with one row or needles · CPC title

• F16C17/04

  for axial load only · CPC title

• F16D3/385 Primary

  Bearing cup; Bearing construction; Bearing seal; Mounting of bearing on the intermediate member · CPC title

• B62D1/16

  Steering columns · CPC title