Axial-radial slide bearing having polymer slide elements and corresponding slide element

Patent metadata

Field	Value
Publication number	US-9599157-B2
Application number	US-201414780877-A
Country	US
Kind code	B2
Filing date	Mar 27, 2014
Priority date	Mar 28, 2013
Publication date	Mar 21, 2017
Grant date	Mar 21, 2017

Abstract

An axial-radial sliding bearing with polymer sliding elements includes a first bearing race and a second bearing race, which are rotatable oppositely to each other about a bearing shaft, wherein the second bearing race defines a substantially U-shaped cross section for receiving the first bearing race at least in certain regions. The sliding elements are made from tribopolymer and are arranged between the first and the second bearing races. The sliding elements each have a substantially L-shaped cross section comprising an axial region having axial sliding surfaces and a radial region having radial sliding surfaces. The radial region of the sliding elements includes at least one hinge connection, which connects two segments of the radial region in a flexible manner and so as to be movable oppositely to each other. A sliding element may include at least one such hinge connection in the radial region of the sliding element.

First claim

The invention claimed is:

1. Axial-radial sliding bearing with polymer sliding elements, comprising:
a first bearing race and a second bearing race which are rotatable oppositely to each other about a bearing shaft, wherein the second bearing race defines a substantially U-shaped cross section for receiving the first bearing race;
sliding elements made from a polymer, which are arranged between the first and the second bearing races for uncoupling the bearing races axially and radially, wherein the sliding elements each have a substantially L-shaped cross section comprising an axial region having axial sliding surfaces and a radial region having radial sliding surfaces; and
wherein the radial region of the sliding elements includes at least one hinge connection, which connects two segments of the radial region in a flexible manner and so as to be movable relative to each other so that the sliding elements are adapted to a diameter of the axial-radial sliding bearing.

2. Axial-radial sliding bearing according to claim 1 , wherein the hinge connection is produced similar to a living hinge by a diminished wall thickness between the segments in the radial region.

3. Axial-radial sliding bearing according to claim 1 , wherein the radial region of the sliding elements includes several hinge connections that subdivide the radial region into several flexibly connected segments.

4. Axial-radial sliding bearing according to claim 1 , wherein only one segment of the radial region is connected to the axial region in a flexible manner via a further hinge connection.

5. Axial-radial sliding bearing according to claim 1 , wherein the axial regions of the sliding elements present connectors arranged on outer corners, for fixing the axial regions to each other.

6. Axial-radial sliding bearing according to claim 1 , wherein, for increasing the bendability of the axial region, one or several diminishments of the cross section proceed in the transverse direction to a pivot axis of the at least one hinge connection of the radial region.

7. Axial-radial sliding bearing according to claim 1 , wherein at least the axial regions of the sliding elements have a trapezoidal layout with two equal sides that include an angle (2α) of ≦20°.

8. Axial-radial sliding bearing according to claim 1 , wherein, between the bearing races, two opposing sliding rings composed of a plurality of sliding elements are arranged, and that the bearing races are axially and radially supported one against the other.

9. Axial-radial sliding bearing according to claim 1 , wherein an inner diameter of the axial-radial sliding bearing amounts to 250 mm at minimum, to 500 mm at minimum.

10. A polymer sliding element for an axial-radial sliding bearing, the polymer sliding element comprising: a substantially L-shaped cross section comprising an axial region having axial sliding surfaces and a radial region having radial sliding surfaces; and
wherein the radial region includes at least one hinge connection, which connects two segments of the radial region in a flexible manner and so as to be movable relative to each other so that the sliding element can be adapted to a diameter of the axial-radial sliding bearing.

11. Polymer sliding element according to claim 10 , wherein the hinge connection is produced in the manner of a living hinge by a diminished wall thickness between the segments in the radial region.

12. Polymer sliding element according to claim 10 , wherein the radial region of the sliding elements includes several hinge connections that subdivide the radial region into several flexibly connected segments.

13. Polymer sliding element according to claim 10 , wherein one segment of the radial region is flexibly connected to the axial region via a further hinge connection.

14. Polymer sliding element according to claim 10 , wherein the axial regions of the sliding elements present connectors, arranged on outer corners, for fixing the axial regions to each other.

15. Polymer sliding element according to claim 10 , wherein, for increasing the bendability of the axial region, one or several diminishments of the cross section proceed in the transverse direction to a pivot axis of the at least one hinge connection of the radial region.

16. Polymer sliding element according to claim 10 , wherein at least the axial regions of the sliding elements have a trapezoidal layout with two equal sides that include an angle (2α) of ≦20°.

17. Polymer sliding element for a sliding bearing, wherein the sliding element has a substantially L-shaped cross section comprising an axial region having axial sliding surfaces and a radial region having radial sliding surfaces; and
wherein the radial region exhibits a flexibility which is higher than in the axial region and has segments that are movable relative to each other so that the sliding element can be adapted to a diameter of an axial-radial sliding bearing.

18. Polymer sliding element according to claim 17 , wherein the radial region is integrally made of a tribopolymer and has a diminished strength of material compared to the axial region.

19. Polymer sliding element according to claim 17 , wherein the radial region of the sliding elements includes several hinge connections that subdivide the radial region into several flexibly connected segments.

20. Polymer sliding element according to claim 19 , wherein one segment of the radial region is flexibly connected to the axial region via a further hinge connection.

21. Polymer sliding element according to claim 17 , wherein only one segment of the radial region is connected to the axial region.

22. Polymer sliding element according to claim 10 , wherein the polymer sliding element is made from a tribopolymer.

23. Polymer sliding element according to claim 17 , wherein the polymer sliding element is made from a tribopolymer.

Assignees

• Igus Gmbh

Inventors

• Selzer Ralf

Classifications

• F16C33/201

  Composition of the plastic · CPC title

• F16C33/20 Primary

  Sliding surface consisting mainly of plastics (F16C33/22 - F16C33/28 take precedence) · CPC title

• F16C17/10

  for both radial and axial load · CPC title

• F16C17/107

  with at least one surface for radial load and at least one surface for axial load · CPC title

• F16C2208/32

  Polytetrafluorethylene [PTFE] (F16C2208/58 takes precedence) · CPC title