Disk brake, in particular for utility vehicles, and brake pad of a disk brake of said type

Patent metadata

Field	Value
Publication number	US-2016169305-A1
Application number	US-201414907386-A
Country	US
Kind code	A1
Filing date	May 23, 2014
Priority date	Jul 29, 2013
Publication date	Jun 16, 2016
Grant date	—

Abstract

A disk brake includes a brake disk, a brake caliper, which fits over the brake disk, a brake support, a brake pad and an application device, which presses the brake pad against the brake disk when braking, wherein the brake pad rests in a U-shaped well and the two legs of the “U” serve to support the brake pad in the circumferential direction of the brake disk and the “base” of the “U” serves to support the brake pad radially toward the inside. The distance between the two legs of the “U” is shorter at the radially outer ends thereof than the distance at the radially inner ends thereof.

First claim

1 . A method for compressed air preparation in motor vehicles, comprising the following steps:
drawing in ambient air; compressing the ambient air by a compressor ( 2 ) driven by a drive motor of a motor vehicle; dried drying the compressed air in a downstream air dryer ( 4 , 4 ); delivering the dried air to compressed air consumers ( 14 , 16 ); regenerating the air dryer ( 4 , 4 ′) with system air stored in a regeneration reservoir ( 30 , 30 ′), passed via the air dryer ( 4 , 4 ′) and vented via an associated vent valve ( 22 ); in predetermined operating states, switching between a delivery phase and a regeneration phase via an electrically controlled governor ( 36 , 36 ′), wherein a driving mode with a high speed of the drive motor is used for the delivery phase of the compressor ( 2 ), at least in phases of high compressed air consumption, and wherein a stationary mode at an idling speed of the drive motor is used for the regeneration phase.

2 . The method as claimed in claim 1 , wherein one or more regeneration phases with intermediate partial or complete refilling of the regeneration reservoir follow after phases with high compressed air consumption, irrespective of a current system pressure.

3 . The method as claimed in claim 1 , wherein one or more regeneration phases take place, irrespective of a current system pressure, given a maximum permissible water input in the air dryer ( 4 , 4 ′).

4 . The method as claimed in claim 1 , wherein an interval between a cut-in pressure and a cut-out pressure of the compressor ( 2 ) is reduced and hence a regeneration frequency is increased when the air dryer is under a high dryer load.

5 . The method as claimed in claim 1 , further comprising the step of passing system air delivered by the compressor ( 2 ) into the air dryer ( 4 , 4 ′) in the regeneration phase, in addition to regeneration air from the regeneration reservoir ( 30 , 30 ′).

6 . The method as claimed in claim 5 , wherein the additionally passed system air is diverted from an air dryer control line ( 42 ) leading from the governor ( 36 , 36 ′) to the vent valve ( 22 ).

7 . A device for compressed air preparation in motor vehicles, comprising
a compressor ( 2 ) configured to be driven by a drive motor of a motor vehicle, an air dryer ( 4 , 4 ′) arranged downstream of the compressor and having a regeneration reservoir ( 30 , 30 ′) connected to the dryer by a regeneration air line ( 26 ) and by a regeneration air inlet ( 60 ), a vent valve ( 22 ) for venting the regeneration air, two compressed air consumers ( 14 , 16 ) arranged downstream of the air dryer ( 4 , 4 ′), and a governor ( 36 , 36 ′), which switches the compressor ( 2 ) pneumatically between a delivery mode and a standby mode and, depending on the air dryer ( 4 , 4 ′), between a dryer mode and a regeneration mode, wherein the governor ( 36 , 36 ′) has an electrically controlled compressor control valve ( 40 ) connected to the compressor ( 2 ) by a pneumatic compressor control line ( 38 ), and an electrically controlled air dryer control valve ( 44 ) connected to the vent valve ( 22 ) of the air dryer ( 4 , 4 ′) by a pneumatic air dryer control line ( 42 ).

8 . The device as claimed in claim 7 , wherein a branch line ( 54 ) connected to the regeneration air inlet ( 60 ) of the air dryer ( 4 ) branches off from the air dryer control line ( 42 ).

9 . The device as claimed in claim 8 , wherein a fourth check valve ( 56 ) opening in the direction of the air dryer ( 4 ) and a first small orifice ( 58 ), which ensures a predetermined control pressure in the air dryer control line ( 42 ) upstream of the air dryer, are arranged in the branch line ( 54 ).

10 . The device as claimed in claim 7 , wherein the regeneration reservoir ( 30 ′) is arranged in series between the air dryer ( 4 ′) and the two compressed air consumers ( 14 ′, 16 ′), wherein the air dryer ( 4 ′) and the regeneration reservoir ( 30 ′) are connected to one another by a filling line ( 62 ), in which a fifth check valve ( 64 ) opening toward the regeneration reservoir ( 30 ′) is arranged, wherein the regeneration reservoir ( 30 ′) is connected to the air dryer ( 4 ′) by an emptying line ( 66 ), and wherein a second small orifice ( 68 ) is arranged in the emptying line ( 66 ).

11 . The device as claimed in claim 7 , wherein the compressor control valve ( 40 ) and the air dryer control valve ( 44 ) are each designed as 3/2-way valves, which, in a first switching position, connect a system pressure line ( 34 ) to the compressor control line ( 38 ) associated with the compressor control valve ( 40 ) and air dryer control line ( 42 ) associcated with the air dryer control valve ( 44 ), and, in a second switching position, separate the associated compressor control line ( 38 ) and air dryer control line ( 42 ) from the system pressure line ( 34 ) and connect them to a vent port ( 48 , 50 ).

12 . The disk brake as claimed in claim 7 , further comprising a hold-down device ( 22 , 24 , 26 ) for holding the brake pad in the well.

13 . The disk brake as claimed in claim 7 , further comprising an adjusting device for adjustment in the case of wear.

14 . A brake pad of a disk brake, comprising:
two supporting surfaces, forming legs of a “U”, for support in the circumferential direction and a supporting surface, forming a base of the “U”, for support radially toward the inside, wherein the distance between the two legs of the “U” is shorter at radially outer ends thereof than the distance at the radially inner ends thereof.

15 . The brake pad as claimed in claim 14 , wherin the supporting surface forming the base of the “U” is arc-shaped in at least some section.

16 . The brake pad as claimed in claim 14 , wherin the base of the “U” is rectilinear in at least some section or sections.

17 . The brake pad as claimed in claim 14 , wherin a section of the supporting surface forming the base of the “U” extends in a straight line and encloses an angle (β, γ) of at least 2° with a plane (E) perpendicular to a center plane (M) of the brake pad.

18 . The brake pad as claimed in claim 14 , wherein
a first section of the supporting surface forming the base of the “U” extends in a straight line and encloses a first angle (β) with a plane (E) perpendicular to a center plane (M) of the brake pad, which passes through the brake axis (A), a second section of the supporting surface forming the base of the “U” extends in a straight line and encloses a second angle (γ) with the plane perpendicular to the center plane (M) of the brake pad, which passes through the brake axis (A), and the first and second angles are equal.

19 . The brake pad as claimed in claim 14 , wherein
a first section of the supporting surface forming the base of the “U” extends in a straight line and encloses a first angle (β) with a plane (E) perpendicular to a center plane (M) of the brake pad, a second section of the supporting surface forming the base of the “U” extends in a straight line and encloses a second angle (γ) with the plane (E) perpendicular to the center plane (M) of the brake pad, wherein the first and second angles are different.

20 . The brake pad as claimed in claim 14 , wherein a section of the supporting surface forming the base of the “U” extends in a straight line and encloses an angle (α) in a range of from 75° to 105° with a leg of the “U”.

21 . (canceled)

Assignees

• Wabco Europe Bvba

Inventors

• Halfmann Joachim

Classifications

• F16D2065/026

  characterised by a particular outline shape of the braking member, e.g. footprint of friction lining · CPC title

• F16D55/226 Primary

  in which the common actuating member is moved axially {, e.g. floating caliper disc brakes} · CPC title

• F16D65/095

  Pivots or supporting members therefor · CPC title

• F16D2055/0008

  Brake supports · CPC title

• F16D65/0068

  Brake calipers · CPC title