# US 2014/0151168 A1 · Brake pad structure of hydraulic brake

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 2014/0151168 A1
- Document ID: US20140151168A1
- Status: Published application
- Kind: A1
- Application number: 13/705,044
- Filed: 2012-12-04
- Published: 2014-06-05
- Earliest claimed: 2012-12-04
- Inventors: Yuan-Hung WEN
- Web page: https://patentgrep.com/patent/US20140151168A1

## CPC

- F16D 65/092: for axially-engaging brakes, e.g. disc brakes
- F16D 65/847: with open cooling system, e.g. cooled by air
- F16D 2065/789: {External cooling ribs}
- F16D: COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES

## Abstract

A brake pad structure of a hydraulic brake includes a back plate, a friction member and a heat dissipation device. The back plate has a first heat transfer coefficient. The heat dissipation device includes a connecting portion and a heat dissipation portion. The connecting portion is disposed between the back plate and the friction member. The heat dissipation portion is protrusive outside the back plate and the friction member. The heat dissipation device has a second heat transfer coefficient greater than the first heat transfer coefficient. Whereby, heat of the friction member can be transferred to the air via the heat dissipation device, and thus the friction member will not be superheated and less heat can be transferred to the hydraulic fluid inside an oil pressure cylinder, such that failure of brake can be prevented.

## Claims

### Claim 1

A brake pad structure of a hydraulic brake, including:
a back plate, having a first heat transfer coefficient, the back plate including a first surface and a second surface, the second surface to be urged by an oil pressure cylinder;
a friction member, for braking a brake disc; and
a heat dissipation device, including a connecting portion and a heat dissipation portion, the connecting portion disposed between the back plate and the friction member, the heat dissipation portion being protrusive outside the back plate and the friction member, the heat dissipation device having a second heat transfer coefficient greater than the first heat transfer coefficient.

### Claim 2 (depends on 1)

The brake pad structure of hydraulic brake of claim 1, wherein the heat dissipation portion include a heat dissipation plate connected to the connecting portion and outside the back plate and the friction member.

### Claim 3 (depends on 2)

The brake pad structure of a hydraulic brake of claim 2, wherein the heat dissipation plate and the connecting portion are made of Cu or Cu-containing alloy.

### Claim 4 (depends on 2)

The brake pad structure of a hydraulic brake of claim 2, wherein the heat dissipation portion includes a heat sink attached to the heat dissipation plate.

### Claim 5 (depends on 2)

The brake pad structure of a hydraulic brake of claim 2, wherein the heat dissipation plate is sheet-shaped and bendable, and the heat dissipation plate is able to be bent to form at least one bending portion.

### Claim 6 (depends on 1)

The brake pad structure of a hydraulic brake of claim 1, wherein the first surface of the back plate is formed with a protrusive fixation portion, and the connecting portion is fixed to the fixation portion.

### Claim 7 (depends on 6)

The brake pad structure of a hydraulic brake of claim 6, wherein the fixation portion is formed with a recess, the connecting portion is formed with a hole and a wedge portion, the hole is formed around the wedge portion, the hole and the fixation portion have corresponding shapes, and the wedge portion and the recess have corresponding shapes.

### Claim 8 (depends on 1)

The brake pad structure of a hydraulic brake of claim 1, further including a heat isolation layer disposed between the first surface of the back plate and the connecting portion, and the heat isolation layer has a third heat transfer coefficient smaller than the first heat transfer coefficient and the second heat transfer coefficient.

### Claim 9 (depends on 1)

The brake pad structure of a hydraulic brake of claim 1, wherein the second surface of the back plate is formed with at least one heat dissipation groove.

### Claim 10 (depends on 1)

The brake pad structure of a hydraulic brake of claim 1, further including a heat isolation bush and a pin, the heat isolation bush is disposed through the back plate and the heat dissipation device, the pin is inserted in the heat isolation bush, and the heat isolation bush has a fourth heat transfer coefficient smaller than the first heat transfer coefficient and the second heat transfer coefficient.