Opposed piston type disc brake

Patent metadata

Field	Value
Publication number	US-10914351-B2
Application number	US-201716346554-A
Country	US
Kind code	B2
Filing date	Nov 16, 2017
Priority date	Nov 18, 2016
Publication date	Feb 9, 2021
Grant date	Feb 9, 2021

Abstract

In this disc brake, a pair of brake pads has recesses in the outer peripheral surfaces thereof. A pad spring has a first pressing section extending axially and provided to a base, the first pressing section pressing, toward the trailing side, a first section to be pressed which is provided on the trailing-side side surface of side surfaces which form the recess of a brake pad—and which are raised outward in the radial direction of a rotor. Also, the pad spring has a second pressing section extending axially and provided to the base, the second pressing section—pressing radially inward on the bottom surface of the recess of each of the pair of brake pads, the bottom surface being a second section to be pressed which is provided on an outer peripheral section.

First claim

The invention claimed is:

1. An opposed piston type disc brake comprising:
a disk-shaped disc rotor;
a caliper that is provided so as to cross one portion of an outer peripheral section of the disc rotor and that accommodates pistons arranged on both sides in an axial direction of the disc rotor;
a pair of brake pads pressed by the piston in an interior of the caliper to press the disc rotor from both sides in the axial direction;
a pair of pad pins provided on a leading side and a trailing side in a circumferential direction of the disc rotor to support the pair of the brake pads to be movable in the axial direction with respect to the caliper; and
a pad spring including a base extending in the axial direction, and a first locking portion extending from the base toward the leading side and a second locking portion extending from the base toward the trailing side in the circumferential direction and respectively locked with one of the pair of the pad pins, the pad spring pressing the pair of the brake pads; wherein
the pair of the brake pads includes:
a first section to be pressed provided on the trailing side of the outer peripheral section and raised outward in a radial direction of the disc rotor, and a second section to be pressed provided on the outer peripheral section; and
the pad spring includes
a first pressing section that extends in the axial direction and is provided on the base and that presses the first section to be pressed of the pair of the brake pads toward the trailing side, and
a second pressing section that extends in the axial direction and is provided on the base and that presses the second section to be pressed of the pair of the brake pads inward in the radial direction,
the second section to be pressed is provided on an end face of a projection projecting outward in the radial direction of the disc rotor from the outer peripheral section,
the first pressing section acts a first pressing force to press the pair of the brake pads toward the trailing side at a first pressing point of the first section to be pressed,
the second pressing section acts a second pressing force to press the pair of the brake pads inward in the radial direction at a second pressing point of the second section to be pressed,
the end face of the projection is provided so that the first pressing point and the second pressing point exist on a first virtual plane orthogonal to the acting direction of the second pressing force,
the first section to be pressed and the second section to be pressed are orthogonal to each other,
the first pressing section perpendicularly presses the first section to be pressed toward the trailing side,
the second pressing section perpendicularly presses the second section to be pressed inward in the radial direction of the rotor,
the magnitude of the first pressing force is set larger than the magnitude of the second pressing force, and
the first pressing section is configured to, during braking, cause rotation behavior of the pair of brake pads about the first pressing point.

2. The opposed piston type disc brake according to claim 1 , wherein the second pressing section is provided on the leading side of the first pressing section in the circumferential direction.

3. The opposed piston type disc brake according to claim 1 , wherein the first pressing section and the second pressing section are arranged to project out from the base in a direction orthogonal to the axial direction toward the pair of the brake pads and to be parallel with each other in the axial direction on the base.

4. The opposed piston type disc brake according to claim 2 , wherein the first pressing section and the second pressing section are arranged to project out from the base in a direction orthogonal to the axial direction toward the pair of the brake pads and to be parallel with each other in the axial direction on the base.

5. The opposed piston type disc brake according to claim 1 , wherein the acting direction of the first pressing force and the acting direction of the second pressing force are orthogonal to each other on a second virtual plane which is orthogonal to the axial direction and on which the first pressing point and the second pressing point exist.

Assignees

• Advics Co Ltd

Inventors

• Furukawa Kazuma

Classifications

• F16D55/228 Primary

  with a separate actuating member for each side · CPC title

• F16D63/004 Primary

  comprising a rotor engaged both axially and radially by braking members, e.g. combined drum and disc brakes · CPC title

• F16D65/0974

  acting on or in the vicinity of the pad rim in a direction substantially transverse to the brake disc axis · CPC title

• F16D65/092

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

• F16D2065/026

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