Statically optimized hybrid roller bearing

Patent metadata

Field	Value
Publication number	US-12529396-B2
Application number	US-202218286118-A
Country	US
Kind code	B2
Filing date	Apr 8, 2022
Priority date	Apr 12, 2021
Publication date	Jan 20, 2026
Grant date	Jan 20, 2026

Abstract

A bearing ( 1 ) for mounting on a cylindrical guide section ( 61 ), extending in a longitudinal direction, of a rail ( 6 ), is guided displaceably in a longitudinal direction rollers and sliding elements. The bearing ( 1 ) includes a housing which has a passageway that runs through the housing and in which a receiving channel for receiving the guide section ( 61 ) of the rail ( 6 ) is formed. The bearing ( 1 ) includes two rollers ( 8 ) which are spaced apart from each other in the longitudinal direction, are in each case mounted rotatably in the housing and, with their running surfaces, in each case delimit the receiving channel in a transverse direction. Between the rollers ( 8 ), the housing has an installation channel, which runs through the housing along an installation axis (Y) perpendicularly to the longitudinal direction, for receiving an installation bolt in a manner rotatable about the installation axis (Y). A plurality of sliding elements ( 7 ) are arranged in the passageway and in each case, by means of one of their sides, delimit the receiving channel perpendicularly to the longitudinal direction.

First claim

The invention claimed is:

1 . A bearing for longitudinal movement along a cylindrical guide portion of a rail extending with a cylinder axis in a longitudinal direction, the bearing comprising:
a housing having a passageway running through the housing along a longitudinal axis running in the longitudinal direction, the passageway forming a receiving channel for receiving the guide portion of the rail; and two rollers spaced apart in the longitudinal direction, each roller being rotatable in the housing about a roller axle running perpendicular to the longitudinal direction and each roller bounding the receiving channel with a running surface in a transverse direction extending perpendicular to the roller axle, and wherein the housing has, in the longitudinal direction between the rollers, a mounting channel running through the housing perpendicular to the longitudinal direction along a mounting axis for receiving a mounting peg which is rotatable about the mounting axis, and wherein a plurality of sliding elements is arranged in the passageway spaced apart from each other in the longitudinal direction, the sliding elements being longitudinally spaced apart relative to the rollers, said sliding elements each bounding the receiving channel perpendicular to the longitudinal direction.

2 . The bearing according to claim 1 , wherein a mounting bushing is rotatably mounted in the mounting channel and projects along the mounting axis beyond the housing on at least one side.

3 . The bearing according to claim 2 , further comprising
a hollow cylindrical first sliding member in the mounting channel between the housing and the mounting bushing; and a second sliding member in the mounting channel offset from the first sliding member along the mounting axis.

4 . The bearing according claim 1 , wherein the housing has first and second housing parts arranged next to one another along the mounting axis and fixed detachably to one another.

5 . The bearing according to claim 2 , wherein the mounting bushing has on an outer side a radial projection, which is arranged in a radial extension of the mounting channel, which is bounded along the mounting axis on both sides inside the housing, to fix a position of the mounting bushing relative to the housing along the mounting axis, wherein the extension of the mounting channel is formed between ends of the two housing parts facing one another along the mounting axis.

6 . The bearing according to claim 5 , further comprising:
a hollow cylindrical first sliding member provided in the mounting channel between the housing and the mounting bushing, wherein the first sliding member has a first sliding member projection with which it is arranged in a first portion of the extension of the mounting channel to fix a position of the first sliding member relative to the housing along the mounting axis; and a second sliding member provided in the mounting channel offset from the first sliding member along the mounting axis, the second sliding member having a second sliding member projection with which it is arranged in a second portion of the extension of the mounting channel to fix a position of the second sliding member relative to the housing along the mounting axis.

7 . The bearing according to claim 6 , wherein the first sliding member is arranged in the first portion of the mounting channel formed by the first housing part and the second sliding member is arranged in the second portion of the mounting channel formed by the second housing part.

8 . The bearing according to claim 1 , wherein the mounting channel is spaced equidistantly in the longitudinal direction from the two rollers, wherein the mounting channel is arranged on the same side of the receiving channel as the roller axles.

9 . The bearing according to claim 1 , wherein at least one of the sliding elements is arranged in each longitudinal end portion of the passageway.

10 . The bearing according to claim 1 , wherein the running surfaces of the rollers each have a concave contour facing the receiving channel, the concave contour has a cross-section perpendicular to the longitudinal direction that forms a segment of a sphere.

11 . The bearing according to claim 1 , wherein the sliding elements enclose the longitudinal axis of the passageway with an enclosure angle of at least 220°.

12 . The bearing according to claim 1 , wherein the passageway completely encloses the longitudinal axis perpendicular to the longitudinal direction over an angular range of at least 220° and has a longitudinally continuous opening on a side facing perpendicular to the longitudinal direction.

13 . The bearing according to claim 1 , wherein the sliding elements have grooves running in the longitudinal direction.

14 . The bearing according to claim 1 , wherein the roller axles run parallel to the mounting axis.

15 . The bearing according to claim 1 , wherein the sliding elements are made from a tribological polymer and/or the housing is made from a metal or a metal alloy.

16 . The bearing according to claim 1 , wherein at least one of the sliding elements is arranged in each longitudinal end portion of the passageway and is arranged closer to an absolute longitudinal end of the housing associated therewith than the roller lying closest thereto in the longitudinal direction.

17 . A bearing assembly comprising the bearing according to claim 1 and a rail with a guide portion configured in the manner of a cylinder, wherein the guide portion is arranged so as to be displaceable in the passageway of the bearing in the longitudinal direction, and bears against both rollers perpendicular to the longitudinal direction and is spaced from the sliding elements perpendicular to the longitudinal direction by less than 0.5 mm.

18 . The bearing assembly according to claim 17 , further comprising a further bearing according to claim 1 , wherein the bearings are arranged next to one another in the longitudinal direction and the guide portion is arranged in the passageways of the bearings and the bearings are each fastened to a structural member by way of a mounting peg arranged in a respective mounting channel and/or a mounting bushing arranged in the respective mounting channel.

Assignees

• Igus Gmbh

Inventors

• Moshammer Horst

Classifications

• F16C29/004

  Fixing of a carriage or rail, e.g. rigid mounting to a support structure or a movable part · CPC title

• F16C29/007 Primary

  Hybrid linear bearings, i.e. including more than one bearing type, e.g. sliding contact bearings as well as rolling contact bearings · CPC title