Disc brake

Patent metadata

Field	Value
Publication number	US-2018195568-A1
Application number	US-201615740579-A
Country	US
Kind code	A1
Filing date	Jun 21, 2016
Priority date	Jun 30, 2015
Publication date	Jul 12, 2018
Grant date	—

Abstract

A disk brake includes a caliper, an inner pad and an outer pad that press a disk, a piston pressing the inner pad, and a claw portion pressing the outer pad. The inner pad includes a first surface that contacts the disk when the inner pad presses the disk and a second surface opposite to the first surface. The second surface has a first hole. The outer pad includes a third surface that contacts the disk when the outer pad presses the disk and a fourth surface opposite to the third surface. The fourth surface has a second hole. The first hole and the second hole are disposed so that, when the inner pad is projected onto the outer pad in the axial direction of the disk, the gravity center of the first hole and the gravity center of the second hole are offset relative to each other.

First claim

1 . A disk brake comprising:
a caliper formed to extend over an outer periphery side of a disk rotating together with a wheel; an inner pad and an outer pad which are configured to press the disk; a piston configured to press the inner pad; and a claw portion configured to press the outer pad; wherein the inner pad includes a first surface that contacts the disk when the inner pad presses the disk, and a second surface opposite to the first surface, the second surface has at least one first hole, the outer pad includes a third surface that contacts the disk when the outer pad presses the disk, and a fourth surface opposite to the third surface, the fourth surface has at least one second hole, and the at least one first hole and the at least one second bole are disposed so that, when the inner pad is projected onto the outer pad in an axial direction of the disk, a center of gravity of the at least one first hole and a center of gravity of the at least one second hole are offset relative to each other.

2 . The disk brake of claim 1 , wherein the inner pad includes:
a first lining forming the first surface; and a first plate forming the second surface, the outer pad includes: a second lining forming the third surface; and a second plate forming the fourth surface; and the at least the first hole and the at least one second hole are gas vent holes for venting gas from the first lining and the second lining hen the first lining and the first plate are fixed to each other and when the second lining and the second plate are fixed to each other.

3 . The disk brake of claim 2 , wherein, when a direction that connects lug portions provided at opposite sides, respectively, of the inner pad to receive rotational torque and a direction that connects lug portions provided at opposite sides, respectively, of the outer pad to receive rotational torque are each defined as an X axis, and a direction perpendicular to the X axis in the second and fourth surfaces of the first and second plates is defined as a Y axis, the center of gravity of the at least one first hole is offset in the Y-axis direction relative to the center of gravity of the at least one second hole.

4 . The disk brake of claim 3 , wherein the center of gravity of the at least one second hole is located closer to a bridge side of the caliper than the center of gravity of the at least one first hole in the Y-axis direction.

5 . The disk brake of claim 3 , wherein the at least one first hole and the at least one second hole are disposed so that, when the inner pad is projected onto the outer pad in the axial direction of the disk, a line passing through a center of gravity of an abutting surface of the first plate abutting against the piston and parallel to the X axis, a line passing through a center of gravity of an abutting surface of the second plate abutting against the claw portion and parallel to the X axis, and lines passing through respective centers of gravity of the first and third surfaces and parallel to the X axis are coincident with each other.

Assignees

• Hitachi Automotive Systems Ltd

Inventors

• Osada Takahito
• Nakamura Yoshihiro

Classifications

• F16D69/0408

  specially adapted for plane linings · CPC title

• F16D69/00

  Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces (clutching elements F16D13/60; braking members F16D65/02) · CPC title

• F16D65/092 Primary

  for axially-engaging brakes, e.g. disc brakes · CPC title

• F16D2055/0016

  Brake calipers · CPC title

• F16D55/226

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