Disc brake having a synchronization unit

Patent metadata

Field	Value
Publication number	US-10626940-B2
Application number	US-201815907041-A
Country	US
Kind code	B2
Filing date	Feb 27, 2018
Priority date	Aug 31, 2015
Publication date	Apr 21, 2020
Grant date	Apr 21, 2020

Abstract

A disc brake, preferably actuated by compressed air, for a motor vehicle, has a brake caliper which has a brake application section with a brake application device with a rotary brake lever, at least one wear adjusting device for adjusting wear of brake pads, and a brake disc with a synchronization unit which includes an adjusting device, a drive device and a synchronizer. The adjusting device and the drive unit are inserted in each case into a threaded plunger of a spindle unit and are attached by way of a mounting arrangement on a bearing wall of the brake application section of the brake caliper. The synchronization unit is installed with the adjusting device and the drive device as a preassembled group into the brake application section of the brake caliper, wherein the synchronizer is arranged in the region of the mounting arrangements on the bearing wall within the brake application section. A method for installing a synchronization unit is provided.

First claim

What is claimed is:

1. A disc brake for use with a brake disc in a motor vehicle, comprising:
a brake caliper which has an application section with an application apparatus;
at least one wear-compensating readjustment apparatus for compensating wear of brake pads; and
a synchronization unit which comprises a readjustment device, a driver device and a synchronizer, wherein
the readjustment device and the driver device are each inserted into a threaded plunger of a spindle unit and mounted by way of bearing arrangements on a bearing wall of the application section of the brake caliper,
the synchronization unit is installed, as a preassembled group together with the readjustment device and the driver device, into the application section of the brake caliper, and
the synchronizer is arranged within the application section of the brake caliper in a region of the bearing arrangements on the bearing wall,
wherein
the bearing arrangement of the readjustment device comprises:
a bore in the bearing wall of the application section of the brake caliper and a collar on the bearing wall within the application section of the brake caliper;
a support disc on the readjustment device; and
a bearing block with a holding section,

the bearing arrangement of the driver device comprises:
a bore in the bearing wall of the application section of the brake caliper and a collar on the bearing wall of the application section of the brake caliper;
a support disc on the driver device; and
the bearing block with a further holding section,

each support disc has, in alternating fashion around its edge, two diametrically oppositely situated circular section edges and two diametrically oppositely situated flattened portions,
the flattened portions of a respective support disc run in each case parallel to one another,
each of the bores is surrounded, on an inner side of the bearing wall, by in each case one collar over an angle of approximately 240°,
each collar is equipped with a respective collar edge and a respective collar opening,
the collar openings are situated opposite one another,
each collar edge of each collar has an internal radius which is smaller than an internal radius of the respectively associated bore,
each collar is equipped with diametrically arranged holding regions in relation to a respective bore central point,
in an installed state of the synchronization unit, the flattened portions of the support discs of the readjustment device and of the driver device are all arranged parallel to one another,
said flattened portions run at right angles to an imaginary connecting line of bore central points of the bores,
in the installed state of the synchronization unit, the bearing block is arranged between the readjuster device and the driver device,
the bearing block bears with a longitudinal side against the inner side of the bearing wall, and
in each case one lateral holding section on a narrow side of the bearing block is in positively locking contact with in each case one flattened portion of each support disc and forms a rotation prevention facility for the support discs.

2. The disc brake as claimed in claim 1 , wherein
the bearing block, with its longitudinal sides, forms guide sections for the synchronizer.

3. The disc brake as claimed in claim 1 , wherein
the bearing block forms a counterbearing for a brake rotary lever.

4. The disc brake as claimed in claim 1 , wherein
the bearing arrangement of the readjustment device and/or the bearing arrangement of the driver device have in each case one fastening element between the respective support disc and the application section of the brake caliper.

5. A method for installing a synchronization unit having a readjustment device and a driver device into a brake caliper of a disc brake, the method comprising the steps of:
(S1) assembling the synchronization unit having the readjustment device and the driver device, wherein a synchronizer with synchronizing wheels is arranged on upper ends of the readjustment device and of the driver device;
(S2) inserting the assembled synchronization unit into an interior space of an application section of the brake caliper through a brake-disc-side bottom plate flange; and
(S3) mounting the readjustment device and the driver device of the inserted synchronization unit in a bearing wall of the application section of the brake caliper,
wherein
in method step (S1) of assembling, support discs are rotated about a respective axis such that flattened portions of the support discs run parallel to an imaginary connecting line of bore central points, and
the readjuster device and the driver device are initially arranged adjacent to one another such that a spacing of a readjuster axis and a driver axis is smaller than a spacing of the bore central points.

6. The method as claimed in claim 5 , wherein
in method step (S2) of inserting, circular section edges, which point toward a respective bore, of the support discs are arranged laterally in front of a respective collar opening of collars of the bores.

7. The method as claimed in claim 6 , wherein
in method step (S3) of mounting, in a first partial step, the readjuster device and the driver device are slid apart in a direction of an imaginary connecting line of the bore central points to such an extent that the support discs are slid, with the circular section edges, which point toward the respective bore, first, over the respective bore between the respective collar and the bearing wall until said circular section edges come to bear against a respective wall arrangement between collar and the bearing wall, wherein the synchronizer is tensioned.

8. The method as claimed in claim 7 , wherein
in method step (S3) of mounting, in a second partial step, the support discs are each rotated through 90° about the readjuster axis and about the driver axis such that each circular section edge of the support discs is arranged between a respective holding region of the associated collar and the bearing wall of the application section of the brake caliper.

9. The method as claimed in claim 8 , wherein
in method step (S3) of mounting, in a third partial step, a bearing block is inserted through the bottom plate flange between the readjuster device and the driver device such that the bearing block bears with a longitudinal side against the bearing wall, tensions the synchronizer further and, with in each case one holding section, makes positively locking contact with a flattened portion of the support discs so as to form a rotation prevention facility for the support discs.

Assignees

• Knorr Bremse Systeme Fuer Nutzfahrzeuge Gmbh

Inventors

• Peschel Michael
• Asen Alexander
• Stoeger Christian
• Brandl Christian
• Klingner Matthias
• Rguichi Abdelaziz

Classifications

• F16D65/568 Primary

  for synchronous adjustment of actuators arranged in parallel · CPC title

• F16D2121/02

  Fluid pressure · CPC title

• F16D2250/0084

  Assembly or disassembly · CPC title

• F16D2055/0016

  Brake calipers · CPC title