# US 12,110,932 B2 · Disc brake and laminated shim

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- Number: US 12,110,932 B2
- Document ID: US12110932B2
- Status: Granted
- Kind: B2
- Application number: 17/439,525
- Filed: 2019-11-22
- Published: 2022-05-19
- Granted: 2024-10-08
- Earliest claimed: 2019-04-17
- Assignees: Hitachi Astemo, Ltd.
- Applicants: Hitachi Astemo, Ltd.
- Inventors: Takayuki Kinoshita
- Web page: https://patentgrep.com/patent/US12110932B2

## CPC

- F16D 65/095: Pivots or supporting members therefor
- F16D 65/0971: {transmitting brake actuation force, e.g. elements interposed between brake piston and pad}
- F16D 2065/1392: {Connection elements}
- F16D 2065/785: {Heat insulation or reflection}
- F16D: COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES

## Abstract

This disc brake includes a first shim that has a first flat plate portion and claw portions curved from an outer edge side of the first flat plate portion and attached to an outer circumferential surface of a rear plate; and a second shim that has a second flat plate portion disposed in a manner of being sandwiched between the first flat plate portion and the rear plate, and a bent portion curved from an outer edge side of the second flat plate portion to the first flat plate portion side. Relative movement of the second shim with respect to the first shim on a plane parallel to the second flat plate portion is restricted. A leading end portion of the bent portion of the second shim is disposed within a projection plane of a largest flat surface portion of the rear plate in a disc axial direction.

## Claims

### Claim 1

A disc brake comprising:
an attachment member;
a caliper that is provided in the attachment member in a displaceable manner in an axial direction of a disc;
a friction pad that has a rear plate and a lining provided in a manner of being in contact with one surface of the rear plate and is pressed to the disc by the caliper;
a first shim that has a first flat plate portion and claw portions curved from an outer edge side of the first flat plate portion and attached to an outer circumferential surface of the rear plate; and
a second shim that has a second flat plate portion disposed in a manner of being sandwiched between the first flat plate portion of the first shim and the rear plate, and a bent portion curved from an outer edge side of the second flat plate portion to the first flat plate portion side,
wherein relative movement of the second shim with respect to the first shim on a plane parallel to the second flat plate portion is restricted,
wherein a leading end portion of the bent portion of the second shim is disposed within a projection plane of a largest flat surface portion of the rear plate in the disc axial direction, and
wherein a length of the bent portion of the second shim in a direction perpendicular to the second flat plate portion is longer than lengths of the claw portions of the first shim in a direction perpendicular to the first flat plate portion.

### Claim 2 (depends on 1)

The disc brake according to claim 1,
wherein the claw portions of the first shim are formed on a side opposite to a center of the friction pad in a disc rotation direction from the bent portion of the second shim.

### Claim 3 (depends on 1)

The disc brake according to claim 1,
wherein the bent portion of the second shim is formed at an outer edge portion of the second flat plate portion on a side inward in a disc radial direction.

### Claim 4

A laminated shim for a friction pad having a rear plate and a lining, the laminated shim comprising:
a first shim that has a first flat plate portion and claw portions curved from an outer edge side of the first flat plate portion and configured to be attached to an outer circumferential surface of the rear plate; and
a second shim that has a second flat plate portion disposed in a manner of being sandwiched between the first flat plate portion of the first shim and the rear plate, and a bent portion curved from an outer edge side of the second flat plate portion to the first flat plate portion side,
wherein relative movement of the second shim with respect to the first shim on a plane parallel to the second flat plate portion is restricted,
wherein a leading end portion of the bent portion of the second shim is disposed within a projection plane of a largest flat surface portion of the rear plate in the disc axial direction, and
wherein a length of the bent portion of the second shim in a direction perpendicular to the second flat plate portion is longer than lengths of the claw portions of the first shim in a direction perpendicular to the first flat plate portion.