Disc Brake for a Utility Vehicle

Abstract

A disc brake for a utility vehicle is provided. The brake caliper of the disk brake is configured to be mounted in an axially-displaceable manner on a stationary brake carrier by two fastening elements. The two fastening elements are plain bearings arranged in respective bores of the brake caliper, one as a locating bearing and the other as a floating bearing. The floating bearing includes a sliding bush made from a plastic, in particular an elastomer, and a guide rod configured to be connected to the brake carrier is mounted. The sliding bush is held on the guide rod secured against axial displacement between the guide rod and the inner wall of the respective brake caliper bore. The sliding bush is configured to carry a lubricant on its circumferentially outer surface and has sealing lips projects radially outward that bear against the inner wall of the respective bore.

Claims

1-10. (canceled)

11. A disk brake for a utility vehicle, comprising: a brake caliper configured to straddle a brake disk and to be axially displaceable parallel to a rotation axis of the brake disk when in an installed position on a stationary brake carrier; two fastening elements of the brake caliper configured to support the brake caliper on the stationary brake carrier, each fastening element being a plain bearing configured to be arranged in a respective bore of the brake caliper, wherein a first one of the two fastening elements is configured as a locating bearing and a second one of the two fastening elements is configured as a floating bearing, the floating bearing includes a sliding bush configured to be received in the respective brake caliper bore and a guide rod configured to be connected to the stationary brake carrier, the sliding bush is held against axial displacement on the guide rod between an outer circumference of the guide rod and an inner wall of the respective brake caliper bore.

12. The disk brake as claimed in claim 11, wherein the guide rod includes a circumferential groove configured to receive the sliding bush.

13. The disk brake as claimed in claim 12, wherein an axial end of the sliding bush bears on an axial end side of the groove.

14. The disk brake as claimed in claim 13, wherein the sliding bush is formed of at least one of a plastic and an elastomeric material, and at least a portion of guide rod is encapsulated by the sliding bush material.

15. The disk brake as claimed in claim 14, wherein an outer side of the sliding bush which faces the inner wall of the respective bore includes grooves configured to receive grease.

16. The disk brake as claimed in claim 15, wherein the grease grooves are arranged obliquely relative to the a longitudinal axis of the sliding bush.

17. The disk brake as claimed in claim 16, wherein the grease grooves are arranged at an identical spacing from one another.

18. The disk brake as claimed in claim 15, wherein the grease grooves are closed on an axial end side.

19. The disk brake as claimed in claim 15, wherein the sliding bush includes at least two circumferential sealing lips configured to bear against the inner wall of the respective bore, and two of the at least the two circumferential sealing lips are each formed integrally at respective axial end regions of the sliding bush.

20. The disk brake as claimed in claim 19, wherein the at least two circumferential sealing lips includes a plurality of sealing lips arranged adjacent to one another on the sliding bush.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0025] FIG. 1 shows a disk brake in accordance with the present invention in a diagrammatic plan view.

[0026] FIG. 2 shows a part of the FIG. 1 disk brake in an exploded illustration.

[0027] FIG. 3 shows a detail of the FIG. 1 disk brake in a sectioned side view.

[0028] FIG. 4 shows an enlarged detail, in accordance with the marking “B” in FIG. 3.

[0029] FIGS. 5A-5C show a part of the FIG. 1 disk brake guide rod in different views.

DETAILED DESCRIPTION OF THE DRAWINGS

[0030] FIG. 1 shows a disk brake for a utility vehicle, which disk brake has a brake caliper 2 in its basic construction, which brake caliper 2 encloses in the space denoted by reference number 3 a brake disk (not shown). The brake caliper 2 is fastened to an axle (not shown) of the utility vehicle such that it is secured against rotation.

[0031] The brake caliper 2 is arranged on a stationary brake carrier 1 of the utility vehicle such that it can be displaced axially, in relation to the brake disk.

[0032] Two fastening elements are provided which have in each case one guide rod 6 which is connected to the brake carrier 1 and is fastened to the brake carrier 1 by a bolt (not shown). Here, one fastening element is configured as a locating bearing 4 and the other is configured as a floating bearing 5.

[0033] In order to mount the guide rod 6, that is to say for axial guidance of the brake caliper 2, the floating bearing 5 has a sliding bush 7 made from a plastic, preferably an elastomer, which is held on the guide rod 6 such that it is secured against displacement according to the invention, as can be seen particularly clearly in FIG. 2. Said figure shows the guide rod 6 with the sliding bush 7 immediately before assembly.

[0034] FIGS. 3 and 4 show a part detail of the brake caliper 2 with an assembled guide rod 6. It can be seen in said figures that the sliding bush 7 projects radially with respect to the guide rod 6 and bears against the wall of the brake caliper-side bore 9.

[0035] A circumferential groove 12, on the walls of which the sliding bush 7 is supported, is made in the shell of the guide rod 6 in order to secure the sliding bush 7 against axial displacement on the guide rod 6 which otherwise has a stepped bore 11 for receiving said bolt for connection to the brake carrier 1.

[0036] FIG. 5B shows the guide rod 6 and FIG. 5C shows the sliding bush 7, in each case as a detail, whereas FIG. 5A illustrates the guide rod 6 with an attached sliding bush 7.

[0037] It can be seen clearly therein and in FIG. 4 that the sliding bush 7 has a multiplicity of grease grooves 10 on its outer side which faces the wall of the bore 9, which grease grooves 10 run obliquely in relation to a center axis of the sliding bush 7. Here, said grease grooves 10 are distributed uniformly over the circumference.

[0038] The grease grooves 10 are closed on the end side by way of circumferential sealing lips 8, of which a plurality are integrally formed on each side such that they lie next to one another.

[0039] Said sealing lips 8 serve both to prevent a discharge of grease from the grease grooves 10 and to seal the latter in order to avoid penetration of dirt.

[0040] As has already been mentioned, the sliding bush 7 is expediently produced by way of encapsulation of the guide rod 6 in the region of the groove 12.

[0041] The foregoing disclosure has been set forth merely to illustrate the invention and is not intended to be limiting. Since modifications of the disclosed embodiments incorporating the spirit and substance of the invention may occur to persons skilled in the art, the invention should be construed to include everything within the scope of the appended claims and equivalents thereof.