Disk brake comprising a quick contact device

Patent metadata

Field	Value
Publication number	US-10801564-B2
Application number	US-201816112005-A
Country	US
Kind code	B2
Filing date	Aug 24, 2018
Priority date	Feb 24, 2016
Publication date	Oct 13, 2020
Grant date	Oct 13, 2020

Abstract

A disk brake actuated preferably by compressed air, for a motor vehicle, includes an application mechanism. The application mechanism has a brake rotary lever which acts on a traverse in which there is arranged at least one readjusting spindle which acts on an application-side brake pad, having a readjusting device, and having a quick contact apparatus. The quick contact apparatus effects an advancing movement which is superposed on an actuation of the disk brake during the phase of overcoming an air gap. The quick contact apparatus has an intermediate element which is variable in terms of its position and which has at least a wedge-shaped design.

First claim

What is claimed is:

1. A disk brake, actuated by compressed air, for a motor vehicle, the disk brake comprising:
an application mechanism with a brake rotary lever which acts on a traverse in which there is arranged at least one readjusting spindle which acts on an application-side brake pad, having a readjusting device, and having a quick contact apparatus, wherein
the quick contact apparatus effects an advancing movement which is superposed on an actuation of the disk brake during the phase of overcoming an air gap,
the quick contact apparatus has an intermediate element which is variable in terms of its position and which has at least a wedge-shaped design,
wherein the intermediate element is formed as a threaded bushing which is in engagement with the brake rotary lever in a rotary drive connection and which is in engagement with the at least one readjusting spindle in a drive-output connection, and
the threaded bushing is arranged rotatably in the traverse, and the at least one readjusting spindle is screwed into the threaded bushing.

2. The disk brake as claimed in claim 1 , wherein the rotary drive connection of the threaded bushing and the brake rotary lever is formed by a toothing on the threaded bushing and a toothing of a crown gear segment of the brake rotary lever.

3. The disk brake as claimed in claim 2 , wherein the threaded bushing has a protruding collar which, on its side facing toward the traverse, has a wedge-shaped design with a number of ramps on an encircling ramp section, and the ramps interact with a number of ramps, corresponding thereto, on the traverse.

4. A disk brake, actuated by compressed air, for a motor vehicle, the disk brake comprising:
an application mechanism with a brake rotary lever which acts on a traverse in which there is arranged at least one readjusting spindle which acts on an application-side brake pad, having a readjusting device, and having a quick contact apparatus, wherein
the quick contact apparatus effects an advancing movement which is superposed on an actuation of the disk brake during the phase of overcoming an air gap,
the quick contact apparatus has an intermediate element which is variable in terms of its position and which has at least a wedge-shaped design,
the intermediate element is formed as a rotary wedge which is arranged in a bearing arrangement of the brake rotary lever on a brake caliper,
the rotary wedge has a cross section which forms a ring segment, in the case of which the central point of an inner radius (Rw) is arranged eccentrically with respect to the central point of an outer radius (Rk),
the rotary wedge has a large lateral cross-sectional surface and a small lateral cross-sectional surface, and the large lateral cross-sectional surface is acted on by a permanently acting force of a pressure spring, and the small lateral cross-sectional surface is operatively connected to an adjusting lever which has a resetting action counter to the direction of action of the pressure spring, and
the adjusting lever is, at its end region averted from the rotary wedge, mounted pivotably on the brake caliper, and the adjusting lever makes contact with an actuating cam of the brake rotary lever.

5. The disk brake as claimed in claim 4 , wherein the rotary wedge is mounted with its outer radius (Rk) pivotably in a cylindrical, hollow receptacle in the brake caliper, and a bearing drum of the bearing arrangement of the brake rotary lever is received in the inner radius (Rw) of the rotary wedge.

6. The disk brake as claimed in claim 5 , wherein the pressure spring is arranged between the large lateral cross-sectional surface of the rotary wedge and a fastening to the brake caliper.

7. The disk brake as claimed in claim 5 , wherein the pressure spring is arranged between the large lateral cross-sectional surface of the rotary wedge and one end of a body with a semicircular cross section of the brake rotary lever.

8. The disk brake as claimed in claim 7 , wherein the adjusting lever is of C-shaped form, and the actuating cam of the brake rotary lever is arranged on another end of the body with the semicircular cross section of the brake rotary lever.

9. The disk brake as claimed in claim 4 , wherein the rotary wedge is mounted with its outer radius (Rk) pivotably in a cylindrical, hollow-like receptacle in a body of the brake rotary lever, and a bearing drum of the bearing arrangement of the brake rotary lever is received in the inner radius (Rw) of the rotary wedge.

10. The disk brake as claimed in claim 9 , wherein the adjusting lever is acted on with a spring force of the pressure spring which is supported on the brake caliper.

11. The disk brake as claimed in claim 10 , wherein the brake rotary lever has a further cam which corresponds to a stop on the brake caliper and which limits a pivoting movement of the brake rotary lever in an initial position of the brake rotary lever.

12. The disk brake as claimed in claim 11 , wherein the rotary wedge has a stop which limits a pivoting movement of the rotary wedge.

13. The disk brake as claimed in claim 12 , wherein the brake rotary lever is connected to a brake cylinder piston or plunger such that pushing and pulling forces can be transmitted.

14. A disk brake, actuated by compressed air, for a motor vehicle, the disk brake comprising:
an application mechanism with a brake rotary lever which acts on a traverse in which there is arranged at least one readjusting spindle which acts on an application-side brake pad, having a readjusting device, and having a quick contact apparatus, wherein
the quick contact apparatus effects an advancing movement which is superposed on an actuation of the disk brake during the phase of overcoming an air gap, and
the quick contact apparatus has an intermediate element which is variable in terms of its position and which has at least a wedge-shaped design,
the intermediate element is formed as a flat wedge which is arranged in the bearing arrangement of the brake rotary lever on a brake caliper,
the flat wedge is arranged between an inner wall of a brake caliper and a bearing drum of the brake rotary lever,
the flat wedge is arranged so as to be guided with a straight base surface displaceably on the inner wall of the brake caliper, wherein an oblique plane of the flat wedge is in contact with the bearing drum of the brake rotary lever, and
the flat wedge has a large lateral cross-sectional surface and a small lateral cross-sectional surface, the large lateral cross-sectional surface is acted on with a permanently acting force of a pressure spring, the small lateral cross-sectional surface is operatively connected to a thrust arm, which has a resetting action counter to the direction of action of the pressure spring, of an adjusting lever with an angled lever, and the angled lever is attached in a pivotably mounted manner to the brake caliper and is in contact with an actuating cam of the brake rotary lever.

15. The disk brake as claimed in claim 14 , wherein the bearing drum, in the region of the contact with the oblique plane of the flat wedge, has a circular-segment-shaped cross section with a chord.

Assignees

• Knorr Bremse Systeme Fuer Nutzfahrzeuge Gmbh

Inventors

• Baumgartner Johann

Classifications

• F16D55/2255 Primary

  in which the common actuating member is pivoted · CPC title

• F16D65/60

  for angular adjustment of two concentric parts of the brake control systems · CPC title

• F16D2121/14

  Mechanical · CPC title

• F16D65/567

  for mounting on a disc brake · CPC title

• F16D65/183

  with force-transmitting members arranged side by side acting on a spot type force-applying member · CPC title