Bolt guiding device for a floating caliper disc brake and corresponding floating caliper disc brake

Patent metadata

Field	Value
Publication number	US-9291219-B2
Application number	US-201214111818-A
Country	US
Kind code	B2
Filing date	Apr 5, 2012
Priority date	Apr 15, 2011
Publication date	Mar 22, 2016
Grant date	Mar 22, 2016

Abstract

A bolt guiding device for a floating caliper disc brake, having at least one guide bolt that is supported in a brake carrier and mounted on a brake caliper, wherein the brake caliper is movably guided over the guide bolt in the axial direction thereof. The bolt guiding device comprises a slide bush, wherein one surface of the inner circumferential surface and outer circumferential surface acts as a retaining surface on which the slide bush is retained, and wherein the other surface of the inner circumferential surface and outer circumferential surface acts as a sliding surface on which the slide bush slides. For this purpose, the slide bush has, facing the sliding surface, at least one guiding surface on each side of the center of the slide bush and at least one intermediate surface extending in the circumferential direction on each side of the center of the slide bush, wherein the diameter of the at least one guiding surface is dimensioned in such a way that said guiding surface is in close contact with the sliding surface, and wherein the diameter of the intermediate surface is dimensioned in such a way that said intermediate surface is provided in direct contact with or with a slight radial spacing from the sliding surface.

First claim

The invention claimed is:

1. A bolt guiding device for a floating caliper disc brake, the floating caliper disc brake having at least one guide bolt that is configured to be supported in a brake carrier and mounted on a brake caliper, wherein the brake caliper is configured to be movably guided relative to the guide bolt in an axial direction of the guide bolt, wherein the bolt guiding device is configured to be disposed between an inner circumferential surface of a location hole of the brake carrier and an outer circumferential surface of the guide bolt accommodated therein, wherein the bolt guiding device comprises a slide bush, wherein one surface of the inner circumferential surface and outer circumferential surface is configured to act as a retaining surface on which the slide bush is retained, and wherein the other surface of the inner circumferential surface and outer circumferential surface is configured to act as a sliding surface on which the slide bush slides;
wherein the slide bush is configured to have, facing the sliding surface:
at least one guiding surface on each side of a center of the slide bush, wherein the center of the slide bush extends transversely to a longitudinal axis of the slide bush; and
at least one intermediate surface extending in a circumferential direction of the slide bush on each side of the center of the slide bush;

wherein respective diameters of the guiding surfaces are dimensioned in such a way that the guiding surfaces are configured to contact the sliding surface;
wherein respective diameters of the intermediate surfaces are dimensioned in such a way that the intermediate surfaces are configured to contact or are configured to have a slight radial spacing from the sliding surface,
wherein the respective diameters of the intermediate surfaces are:
(1) less than the respective diameters of the guiding surfaces when the guiding surfaces and the intermediate surfaces are configured to face the inner circumferential surface, such that the intermediate surfaces only come into supportive action with the sliding surface in the event of a deformation of the guiding surfaces; or
(2) greater than the respective diameters of the guiding surfaces when the intermediate surfaces and guiding surfaces are configured to face the outer circumferential surface, such that the intermediate surfaces only come into supportive action with the sliding surface in the event of a deformation of the guiding surfaces;

wherein provided in at least one of the intermediate surfaces is at least one recess or indentation for receiving lubricant, and wherein the at least one recess or indentation is fully surrounded by a respective one of the intermediate surfaces.

2. The bolt guiding device according to claim 1 , wherein the guiding surfaces are configured to form an interference fit with the sliding surface.

3. The bolt guiding device according to claim 1 , wherein the intermediate surfaces directly adjoin the guiding surface.

4. The bolt guiding device according to claim 1 , wherein provided in the guiding surfaces is at least one recess or indentation for receiving lubricant.

5. The bolt guiding device according to claim 1 , wherein the slide bush further has at least one radial groove configured to face the sliding surface.

6. The bolt guiding device according to claim 5 , wherein the at least one radial groove is disposed between the guiding surfaces and the intermediate surfaces.

7. The bolt guiding device according to claim 5 , wherein a transition between the at least one radial groove and at least one of the intermediate surfaces or/and a transition between at least one of the intermediate surfaces and at least one of the guiding surfaces is of a conical or rounded configuration.

8. The bolt guiding device according to claim 1 , wherein axial end portions of the slide bush are of a conical or rounded configuration.

9. The bolt guiding device according to claim 5 , wherein the slide bush has at least one axial groove extending in longitudinal direction and configured to face the sliding surface.

10. The bolt guiding device according to claim 9 , wherein the at least one axial groove extends over an entire length of the slide bush.

11. The bolt guiding device according to claim 9 , wherein the at least one axial groove is configured to delimit, together with the sliding surface, a clearance that is greater in a radial direction than the at least one radial groove.

12. The bolt guiding device according to claim 1 , wherein the slide bush is configured for fastening to the guide bolt.

13. The bolt guiding device according to claim 1 , wherein the slide bush is configured for fastening to the brake carrier.

14. The bolt guiding device according to claim 13 , wherein the slide bush is formed integrally with a protective gaiter.

15. A floating caliper disc brake having at least one guide bolt that is mounted on a brake caliper and movably guided relative to a brake carrier in an axial direction of the guide bolt, wherein the floating caliper disc brake is configured with a bolt guiding device, wherein the bolt guiding device is disposed between an inner circumferential surface of a location hole of the brake carrier and an outer circumferential surface of the guide bolt accommodated therein, wherein the bolt guiding device comprises a slide bush, wherein one surface of the inner circumferential surface and outer circumferential surface acts as a retaining surface on which the slide bush is retained, and wherein the other surface of the inner circumferential surface and outer circumferential surface acts as a sliding surface on which the slide bush slides,
wherein the slide bush has, facing the sliding surface:
at least one guiding surface on each side of a center of the slide bush, wherein the center of the slide bush extends transversely to a longitudinal axis of the slide bush; and
at least one intermediate surface extending in a circumferential direction of the slide bush on each side of the center of the slide bush;

wherein respective diameters of the guiding surfaces are dimensioned in such a way that the guiding surfaces contact the sliding surface;
wherein respective diameters of the intermediate surfaces are dimensioned in such a way that the intermediate surfaces contact or have a slight radial spacing from the sliding surface; and
wherein the respective diameters of the intermediate surfaces are:
(1) less than the respective diameters of the guiding surfaces in an non-compressed state when the inner circumferential surface is the sliding surface, such that the intermediate surfaces only come into supportive action with the sliding surface in the event of a deformation of the guiding surfaces; or
(2) greater than the respective diameters of the guiding surfaces in a non-compressed state when the outer circumferential surface is the sliding surface, such that the intermediate surfaces only come into supportive action with the sliding surface in the event of a deformation of the guiding surfaces;

wherein provided in at least one of the intermediate surfaces is at least one recess or indentation for receiving lubricant, and wherein the at least one recess or indentation is fully surrounded by a respective one of the intermediate surfaces.

Assignees

• Becker Marco
• Zenzen Guido
• Dang Nong
• Hees Dirk
• Brand Georg
• Debus Dirk
• Lucas Automotive Gmbh

Inventors

• Becker Marco
• Zenzen Guido
• Dang Nong
• Hees Dirk
• Brand Georg
• Debus Dirk

Classifications

• F16D55/227

  by two {or more} pins · CPC title

• F16D55/22655

  Constructional details of guide pins · CPC title

• F16D55/2265 Primary

  the axial movement being guided by one or more pins {engaging bores in the brake support or the brake housing} · CPC title