Disc Brake, Brake Actuation Mechanism For Such A Disc Brake And Method For Brake Adjustment

Patent metadata

Field	Value
Publication number	US-2016017946-A1
Application number	US-201314775407-A
Country	US
Kind code	A1
Filing date	Mar 11, 2013
Priority date	Mar 11, 2013
Publication date	Jan 21, 2016
Grant date	—

Abstract

A disc brake including a brake actuation mechanism and an adjustment mechanism, which is configured to provide, in addition to a reduction of the clearance between a brake pad and a brake disc during brake application, a further increase of the clearance during brake release motion with a value, which may be smaller, equal or larger than the previous clearance reduction. The brake actuation mechanism for that purpose could provide a different regulator unit. Moreover, the invention suggests a method for adjusting the clearance between a brake pad and a brake disc providing a clearance increase during brake release motion, accordingly.

First claim

1 . A disc brake comprising a brake caliper, which straddles at least one brake disc, and a brake actuation mechanism comprising:
an amplification mechanism for introducing a clamping force, a thrust element for transmitting the clamping force via a brake pad onto the brake disc, in which, at the release state of the disc brake, a clearance is set between said brake pad and the brake disc, an adjustment mechanism for compensation of wear of said brake pad and/or said brake disc during brake actuation, the adjustment mechanism being configured to act on said thrust element and comprising a first regulator unit being configured to reduce said clearance between the brake disc and the brake pad during brake actuation motion, characterized by a second regulator unit being configured to, during brake release motion, increase said clearance with a value, which may be smaller, equal or larger than the clearance reduction.

2 . The disc brake according to claim 1 , in which the first regulator unit and the second regulator unit are mechanically activated.

3 . The disc brake according to claim 1 , in which the second regulator unit is cooperating with components of the adjustment mechanism and/or components of the first regulator unit of it.

4 . The disc brake according to claim 3 , in which the second regulator unit is at least partly incorporated in the adjustment mechanism and/or in the first regulator unit of it.

5 . The disc brake according to claim 1 , in which the second regulator unit is incorporated in a return mechanism for the brake actuation mechanism.

6 . The disc brake according to claim 1 , in which the first regulator unit and/or the second regulator unit are formed as a torque limiting clutch, respectively.

7 . The disc brake according to claim 1 , in which the second regulator unit is configured to increase said clearance to a predetermined value during brake release motion.

8 . The disc brake according to claim 1 , in which the second regulator unit is configured to increase said clearance with a predetermined value during brake release motion.

9 . The disc brake according to claim 7 , in which the second regulator unit comprises at least two components which are arranged relative to each other so as to comprise an angular slack between them, which angular slack is taken up during brake release motion thereby providing the predetermined value for clearance increase.

10 . A disc brake comprising a brake caliper, which straddles at least one brake disc, and a brake actuation mechanism comprising:
an amplification mechanism for introducing a clamping force, a thrust element for transmitting the clamping force via a brake pad onto the brake disc, in which at the release state of the disc brake a clearance is set between said brake pad and the brake disc, an adjustment mechanism for compensation of wear of said brake pad and/or said brake disc during brake actuation, the adjustment mechanism being configured to act on said thrust element and being configured to reduce said clearance between the brake disc and the brake pad during brake actuation motion, characterized in that said adjustment mechanism is further configured to, during brake release motion, increase said clearance with a value, which may be smaller, equal or larger than the clearance reduction, and in that said adjustment mechanism for both clearance reduction and clearance increase is mechanically activated.

11 . The disc brake according to claim 10 , in which the adjustment mechanism comprises a first regulator unit being configured to reduce said clearance between the brake disc and the brake pad and a second regulator unit being configured to, during brake release motion, increase said clearance with a value, which may be smaller, equal or larger than the clearance reduction.

12 . The disc brake according to claim 11 , in which the first regulator unit and/or the second regulator unit are formed as a torque limiting clutch, respectively.

13 . The disc brake according to claim 10 , in which the adjustment mechanism is configured to increase said clearance to a predetermined value during brake release motion.

14 . The disc brake according to claim 10 , in which the adjustment mechanism is configured to increase said clearance with a predetermined value during brake release motion.

15 . The disc brake according to claim 13 , in which the adjustment mechanism comprises at least two components which are arranged relative to each other so as to comprise an angular slack between them, which angular slack is taken up during brake release motion thereby providing the predetermined value for clearance increase.

16 . A brake actuation mechanism for a disc brake comprising:
an amplification mechanism for introducing a clamping force onto a thrust element, which transmits the clamping force via a brake pad onto a brake disc of the disc brake, an adjustment mechanism for compensation of wear of said brake pad and/or said brake disc during brake actuation, the adjustment mechanism being configured to act on said thrust element and comprising a first regulator unit being configured to reduce said clearance between the brake disc and the brake pad during brake actuation motion, characterized by a second regulator unit being configured to, during brake release motion, increase said clearance with a value, which may be smaller, equal or larger than the clearance reduction.

17 . The brake actuation mechanism according to claim 16 , in which the first regulator unit and the second regulator unit are mechanically activated.

18 . The brake actuation mechanism according to claim 16 , in which the second regulator unit is cooperating with components of the adjustment mechanism and/or components of the first regulator unit of it.

19 . The brake actuation mechanism according to claim 18 , in which the second regulator unit is at least partly incorporated in the adjustment mechanism and/or in the first regulator unit of it.

20 . The brake actuation mechanism according to claim 16 , in which the second regulator unit is incorporated in a return mechanism for the brake actuation mechanism.

21 . The brake actuation mechanism according to claim 16 , in which the first regulator unit and/or the second regulator unit are formed as a torque limiting clutch, respectively.

22 . The brake actuation mechanism according to claim 16 , in which the second regulator unit is configured to increase said clearance to a predetermined value during brake release motion.

23 . The brake actuation mechanism according to claim 16 , in which the second regulator unit is configured to increase said clearance with a predetermined value during brake release motion.

24 . The brake actuation mechanism according to claim 22 , in which the second regulator unit comprises at least two components which are arranged relative to each other so as to comprise an angular slack between them, which angular slack is taken up during brake release motion thereby providing the predetermined value for clearance increase.

25 . A method of adjusting a clearance between a brake pad and a brake disc of a disc brake to a predefined value comprising the steps of:
compensating an excessive clearance between the brake pad and the brake disc, which excessive clearance results from the actual wear of the brake pad and/or of the brake disc, during brake actuation motion before the brake pad comes

Assignees

• Haldex Brake Prod Ab

Inventors

• Sandberg Stefan

Classifications

• F16D65/567

  for mounting on a disc brake · CPC title

• F16D65/0068

  Brake calipers · CPC title

• F16D55/2265

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

• F16D2125/28

  Cams; Levers with cams · CPC title

• F16D2055/0016

  Brake calipers · CPC title