Disc brake for vehicle

Patent metadata

Field	Value
Publication number	US-12535109-B2
Application number	US-202118027570-A
Country	US
Kind code	B2
Filing date	Sep 21, 2021
Priority date	Sep 23, 2020
Publication date	Jan 27, 2026
Grant date	Jan 27, 2026

Abstract

A disc brake for a vehicle capable of suppressing uneven abrasion of a lining of a friction pad depending on the rigidity of a caliper body and the material of the lining of the friction pad and capable of easily changing an operation feeling. In this disc brake for a vehicle, an inlet-side torque transmitting member 7 for receiving a braking torque of a friction pad 4 and an outlet-side torque transmitting member 8 are each mounted to a friction pad storage portion 3 g of a caliper body 3 . A first torque transmitting portion 7 a of the inlet-side torque transmitting member 7 and a second torque transmitting portion 8 a of the outlet-side torque transmitting member 8 are formed so that a thickness (T 1 ) of the first torque transmitting portion 7 a in the disc circumferential direction and a thickness (T 2 ) of the second torque transmitting portion 8 a in the disc circumferential direction differ from each other. The friction pad 4 is arranged so that the center of the friction pad 4 is offset from the center of the caliper body 3 in the disc circumferential direction.

First claim

The invention claimed is:

1 . A disc brake for a vehicle in which a caliper body is formed by connecting, by a bridge portion extending over an outer circumference of a disc rotor, a pair of action portions each having a cylinder hole for storing a piston, and in which friction pad storage portions are formed in the action portions to store a pair of friction pads provided on both side portions of the disc rotor, wherein
each friction pad storage portion includes a disc inlet-side torque receiving surface that faces a disc inlet-side end surface of the friction pad when the vehicle moves forward, and a disc outlet-side torque receiving surface that faces a disc outlet-side end surface of the friction pad when the vehicle moves forward, an inlet-side torque transmitting member configured to receive a braking torque by abutting against the disc inlet-side end surface of the friction pad is mounted on the disc inlet-side torque receiving surface, an outlet-side torque transmitting member configured to receive a braking torque by abutting against the disc outlet-side end surface of the friction pad is mounted on the disc outlet-side torque receiving surface, and a thickness of the inlet-side torque transmitting member in a disc circumferential direction differs from a thickness of the outlet-side torque transmitting member in the disc circumferential direction, and a center of the friction pad is offset from a center of the caliper body in the disc circumferential direction, wherein the friction pad has a side surface which defines a bottom surface of the friction pad which is located at an inner end of the friction pad with respect to a radial direction of the disc rotor, each of the outlet-side torque transmitting member and the inlet-side torque transmitting member includes a pad supporting portion protruding from an end portion of the outlet-side torque transmitting member and the inlet-side torque transmitting member, respectively, the end portion being located at an inner end of the outlet-side torque transmitting member and the inlet-side torque transmitting member with respect to the radial direction of the disc rotor, the pad supporting portion protruding toward an inner side of the caliper body in the disc circumferential direction along the side surface of the friction pad to support the side surface of the friction pad.

2 . The disc brake for a vehicle according to claim 1 , wherein
the thickness of the inlet-side torque transmitting member in the disc circumferential direction is larger than the thickness of the outlet-side torque transmitting member in the disc circumferential direction, and the center of the friction pad is offset from the center of the caliper body to a disc outlet side.

3 . The disc brake for a vehicle according to claim 1 , wherein
the thickness of the outlet-side torque transmitting member in the disc circumferential direction is larger than the thickness of the inlet-side torque transmitting member in the disc circumferential direction, and the center of the friction pad is offset from the center of the caliper body to a disc inlet side.

4 . The disc brake for a vehicle according to claim 1 , wherein
the caliper body is formed with a plurality of cylinder holes facing the pair of action portions.

5 . The disc brake for a vehicle according to claim 4 , wherein
the cylinder hole on the disc outlet side has a diameter larger than that of the other cylinder hole.

6 . A disc brake for a vehicle in which a caliper body is formed by connecting, by a bridge portion extending over an outer circumference of a disc rotor, a pair of action portions each having a cylinder hole for storing a piston, and in which friction pad storage portions are formed in the action portions to store a pair of friction pads provided on both side portions of the disc rotor, wherein
each friction pad storage portion includes a disc inlet-side torque receiving surface that faces a disc inlet-side end surface of the friction pad when the vehicle moves forward, and a disc outlet-side torque receiving surface that faces a disc outlet-side end surface of the friction pad when the vehicle moves forward, an inlet-side torque transmitting member configured to receive a braking torque by abutting against the disc inlet-side end surface of the friction pad is mounted on the disc inlet-side torque receiving surface, an outlet-side torque transmitting member configured to receive a braking torque by abutting against the disc outlet-side end surface of the friction pad is mounted on the disc outlet-side torque receiving surface, and a thickness of the inlet-side torque transmitting member in a disc circumferential direction differs from a thickness of the outlet-side torque transmitting member in the disc circumferential direction, and a center of the friction pad is offset from a center of the caliper body in the disc circumferential direction, wherein each of the outlet-side torque transmitting member and the inlet-side torque transmitting member includes a pad supporting portion protruding from an end portion on an inner side in a disc radial direction toward an inner side of the caliper body and configured to support a disc radial direction inner side surface of the friction pad, the inlet-side torque transmitting member includes a first torque transmitting portion mounted on the disc inlet-side torque receiving surface, the outlet-side torque transmitting member includes a second torque transmitting portion mounted on the disc outlet-side torque receiving surface, the first torque transmitting portion and the second torque transmitting portion are formed with attachment holes which bolts are attached, each of the attachment holes is formed with female screw portion, the inlet-side torque transmitting member and the outlet-side torque transmitting member are mounted by inserting bolts into the attachment holes from outside towards inside of the caliper body.

Assignees

• Hitachi Astemo Ltd

Inventors

• Doi Tomohiro
• Uehara Shota

Classifications

• F16D65/095

  Pivots or supporting members therefor · CPC title

• F16D55/228 Primary

  with a separate actuating member for each side · CPC title