Plain Bearing Assembly Having a Rail and a Slide

Abstract

A plain bearing assembly (1) includes a rail and a carriage (20). The rail has a rail body (10) elongate in a longitudinal direction, and on one transverse side of there is a cylindrical guide portion (11). The carriage (20) includes a carriage body with a cylindrical passage (22) corresponding to the guide portion (11) to receive the guide portion (11). The inner side of the passage (22), with which, in an operating state of the plain bearing assembly, the carriage (20) rests slidingly in the longitudinal direction against the guide portion (11), is formed by a sliding element made from a sliding material. The sliding element is produced jointly with the carriage body as a one-piece carriage part made of plastics material.

Claims

1. A plain bearing assembly (1) comprising a rail and a carriage (20), wherein the rail has a rail body (10) elongate in a longitudinal direction, at one transverse side of which is provided a cylindrical guide portion (11) which is connected to the rail body (10) via a neck portion of the rail, and wherein the carriage (20) has a carriage body in which a cylindrical passage (22) corresponding to the guide portion (11) is provided for receiving the guide portion (11), wherein the carriage body has a longitudinal slot (26) for receiving the neck portion (13), which slot (26) is connected to the passage (22) and corresponds to the neck portion (13), wherein the inner side of the passage (22), with which, in an operating state of the plain bearing assembly, the carriage (20) rests slidingly in the longitudinal direction against the guide portion (11), is formed by a sliding element made from a sliding material, wherein the entire carriage (20) comprising the carriage body and the sliding element is produced as a one-piece carriage part of plastics material, wherein at least the inner side of the passage (22) is formed by a tribopolymer.

2. The plain bearing assembly (1) according to claim 1, wherein the entire carriage is produced in one piece from a tribopolymer.

3. The plain bearing assembly (1) according to claim 1, wherein the carriage body (24) has a higher fiber content than the sliding element (25).

4. The plain bearing assembly (1) according to claim 1, wherein the cylindrical guide portion and a second cylindrical guide portion (11) are provided on two transverse sides of the rail body (10), wherein the assembly comprises two carriages (20) each with one passage (22) or comprises one carriage (20) with two passages (22), wherein the guide portions (11) are received in the passages (22).

5. The plain bearing assembly (1) according to claim 1, wherein the inner side of the passage (22) includes longitudinal grooves.

6. The plain bearing assembly (1) according to claim 1, wherein the cylindrical passage (22) encloses the guide portion (11) over at least three quarter of the circumference thereof.

7. The plain bearing assembly (1) according to claim 1, wherein the guide portion (11) is produced from a metal, er a metal alloy, aluminum or the alloys thereof, titanium or the alloys thereof, magnesium or the alloys thereof, or stainless steel.

8. A carriage (20) for a plain bearing assembly (1) having a rail with a cylindrical guide portion, a neck portion, and a rail body connected to the cylindrical guide portion via the neck portion, the carriage (20) is produced as a one-piece carriage part of plastics material which carriage part has integrated therein a carriage body and a sliding element produced from a sliding material, wherein a cylindrical passage (22) corresponding to the cylindrical guide portion (11) is provided in the carriage body for receiving the guide portion (11), wherein the carriage body has a longitudinal slot (26) for receiving the neck portion (13), which slot (26) is connected to the passage (22) and corresponds to the neck portion (13), and an inner side of the passage (22), with which, in an operating state of the plain bearing assembly (1), the carriage (20) rests slidingly in the longitudinal direction against the guide portion (11), is formed by the sliding element.

9. The carriage (20) according to claim 8, wherein the carriage (20) has a width of 20 mm to 40 mm, a length of 20 mm to 50 mm and a height of 10 mm to 25 mm and weighs less than 20 g, and in at least one load direction has a static load-carrying capacity of at least 20 N.

10. A method for producing a carriage (20) for the plain bearing assembly (1) according to claim 1, the method for producing the carriage having the carriage body and the sliding element as one-piece carriage part, the method comprising: mixing a base plastics material, solid lubricant and/or lubricant as components, injecting the components into an injection mold and cooling, and after cooling, removing the carriage as a finished molded part.

11. A method for producing a carriage (20) comprising the carriage body and the sliding element as one-piece carriage part for the plain bearing assembly (1) according to claim 1, that the method comprising processing components in a multicomponent injection molding method in such a manner that the solid lubricant or the lubricant or the solid lubricant and the lubricant are concentrated on the inner side of the passage (22) and the fibers in the carriage body are concentrated away from the inner side of the passage (22).

12. A method for producing a carriage (20) for the plain bearing assembly (1) according to claim 1, the method for producing the carriage having the carriage body and the sliding element as one-piece carriage part, the method comprising: mixing a base plastics material, solid lubricant and/or lubricant, and fibers as components, injecting the components into an injection mold and cooling, and after cooling, removing the carriage as a finished molded part.

13. The plain bearing assembly (1) according to claim 1, wherein the guide portion (11) is produced from a metal or a metal alloy.

14. The plain bearing assembly (1) according to claim 1, wherein at least 80 volume percent of the carriage part includes a fiber reinforcement.

15. A carriage (20) for a plain bearing assembly (1) having a rail with a cylindrical guide portion, a neck portion, and a rail body connected to the cylindrical guide portion via the neck portion, the carriage comprising a one-piece carriage part of plastics material, and the carriage part has integrated therein a carriage body and a sliding element produced from a sliding material, wherein the carriage body includes a cylindrical passage (22) configured to receive the cylindrical guide portion (11), the cylindrical passage (22) includes an inner side formed by the sliding element, and a longitudinal slot (26) configured to receive the neck portion (13), the longitudinal slot (26) is connected to the passage (22), and wherein the carriage (20) is configured during use through the sliding element to rest slidingly in the longitudinal direction against the guide portion (11).

16. The carriage (20) according to claim 15, wherein the carriage (20) has a width of 20 mm to 40 mm, a length of 20 mm to 50 mm and a height of 10 mm to 25 mm; weighs less than 20 g; and in at least one load direction has a static load-carrying capacity of at least 20 N.

17. The carriage (20) according to claim 15, wherein the carriage (20) has a width of 20 mm to 40 mm, a length of 20 mm to 50 mm and a height of 10 mm to 25 mm; weighs less than 15 g; and in at least one load direction has a static load-carrying capacity of at least 20 N.

Description

[0029] The invention will now be explained in greater detail with reference to an exemplary embodiment on the basis of drawings, in which:

[0030] FIG. 1: is a schematic diagram of one embodiment of a carriage according to the invention;

[0031] FIG. 2: is a schematic diagram of an oblique view of one embodiment of a plain bearing assembly according to the invention;

[0032] FIG. 3: is a schematic diagram of a side view of the embodiment according to FIG. 2.

[0033] FIG. 1 shows an oblique view of one embodiment of a carriage 20 according to the invention. It is apparent from FIG. 1 that the carriage 20 has a cuboidal carriage body through which a passage 22 extends. The passage 22 is configured in the manner of a cylinder, the cylinder axis of which extends in the longitudinal direction. The carriage body furthermore has a longitudinal slot 26 which is connected to the passage 22. FIG. 3 in particular shows that, in the intended state of a sliding assembly 1 according to the invention, the neck portion 13 of a rail passes through the longitudinal slot 26, which neck portion is connected on the one hand to the guide portion 11 arranged in the passage 22 and on the other hand to the rail body 10 configured for mounting on a component. The cylinder axis of the passage 22 extends parallel to four of the six rectangular faces of the cuboid which substantially constitutes the carriage body. The carriage 20 has a mounting side, which in FIG. 1 faces upward, through which two fastening channels 27 extend, such that a working device can be fastened to the mounting side of the carriage by fastening means, for example screws, which are passed through the fastening channels 27. FIG. 1 furthermore shows that the carriage as a whole takes the form of a one-piece carriage part which integrally forms a sliding element on the inner side of the passage. Longitudinal grooves 23 are provided on the inner side of the passage. The groove depth, which extends radially relative to the cylinder axis of the passage 22, defines the sliding element region, i.e., the region in which, during intended use of the carriage 20, even in the case of wear, frictional contact is provided between the carriage and the guide portion of the rails arranged in the passage 22.

[0034] FIG. 2 shows an oblique plan view of the plain bearing assembly 1 according to the invention. The rail body 10 of the rail with the guide portion 11 mounted thereon can be seen. The carriage 20 is slipped slidably onto the guide portion, wherein the cylindrical passage 22 receives the guide portion 11 of the rail. Longitudinal grooves 23 are let into the inner surface of the passage 22 in order to reduce the contact area and friction.

[0035] FIG. 3 shows a side view of the slide rail assembly. The dimension lines relate to the exemplary embodiment described below. The rail with the rail body 10 and the guide portion 11, which are connected together by the neck portion 13, can again be seen. The neck portion 13 extends through the longitudinal slot 26 in the cylindrical passage 22 and occupies less than one quarter of the entire circumference of the passage. The sliding element region 25 is here shown as part of the carriage 20 and occupies about 0.5-5 mm of the volume of the carriage surrounding the passage 22. The remainder of the carriage forms the carriage body region 24.

LIST OF REFERENCE SIGNS

[0036] 1 Plain bearing assembly [0037] 10 Rail body [0038] 11 Guide portion [0039] 12 Screw hole [0040] 13 Neck portion [0041] 20 Carriage [0042] 22 Cylindrical passage [0043] 23 Longitudinal grooves [0044] 24 Carriage body region [0045] 25 Sliding element region [0046] 26 Longitudinal slot