Brake pad assembly and caliper

Patent metadata

Field	Value
Publication number	US-10955018-B2
Application number	US-201716470829-A
Country	US
Kind code	B2
Filing date	Dec 21, 2017
Priority date	Dec 22, 2016
Publication date	Mar 23, 2021
Grant date	Mar 23, 2021

Abstract

This brake pad assembly is, for example, equipped with: a brake pad that includes a lining and a back plate; a detection unit attached to the plate and detects abrasion of the lining; and a retainer for attaching the unit to the plate in a detachable manner. The retainer has: a base part that contacts a surface of the plate; a first holding part that holds the retainer in a prescribed position on the plate; a second holding part provided so as to be movable between a restricting position in which the unit is restricted from separating from the plate, and a release position in which the unit can be detached from the plate; a biasing part that elastically biases the second holding part toward the restricting position; and an operation part that moves the second holding part to the release position by means of an applied external force.

First claim

The invention claimed is:

1. A brake pad assembly, comprising:
a brake pad comprising a lining configured to come in contact with a slide surface of a disk rotor and a back plate having a first surface and a second surface opposite to the first surface, wherein the lining is fixed on the first surface;
a detection unit attached to the back plate and configured to detect wear of the lining; and
a retainer configured to detachably attach the detection unit to the back plate,
the retainer comprising:
a base portion in contact with the second surface;
a first holding portion for holding the retainer at a predetermined position on the back plate;
a second holding portion provided to be movable between a restricting position, at which the detection unit is restricted from being separated from the back plate, and a release position, at which the detection unit can be attached to or detached from the back plate;
an urging portion for elastically urging the second holding portion from the release position toward the restricting position; and
an operating portion configured to be moved by an external force applied thereon and thus to move the second holding portion from the restricting position to the release position,
wherein the retainer has an elastically deformable movable arm that protrudes from one end portion of the base portion, has the second holding portion and the operating portion, and is configured to function as the urging portion,
wherein the movable arm has an extension portion positioned spaced from the second surface and extending toward the other end portion of the base portion along the base portion,
wherein the movable arm has a bridge portion configured to cross the other end portion of the base portion in a thickness direction of the back plate and spaced from the other end portion,
wherein the base portion has a stopper for restricting movement of the movable arm by abutting against the bridge portion moving in accordance with movement of the movable arm.

2. The brake pad assembly according to claim 1 , wherein a part of an edge of a first opening portion provided in the bridge portion is an abutting portion configured to abut against the stopper.

3. A brake pad assembly, comprising:
a brake pad comprising a lining configured to come in contact with a slide surface of a disk rotor and a back plate having a first surface and a second surface opposite to the first surface, wherein the lining is fixed on the first surface;
a detection unit attached to the back plate and configured to detect wear of the lining; and
a retainer configured to detachably attach the detection unit to the back plate,
the retainer comprising:
a base portion in contact with the second surface;
a first holding portion for holding the retainer at a predetermined position on the back plate;
a second holding portion provided to be movable between a restricting position, at which the detection unit is restricted from being separated from the back plate, and a release position, at which the detection unit can be attached to or detached from the back plate;
an urging portion for elastically urging the second holding portion from the release position toward the restricting position; and
an operating portion configured to be moved by an external force applied thereon and thus to move the second holding portion from the restricting position to the release position,
wherein the retainer has an elastically deformable movable arm that protrudes from one end portion of the base portion, has the second holding portion and the operating portion, and is configured to function as the urging portion,
wherein the movable arm has an extension portion positioned spaced from the second surface and extending toward the other end portion of the base portion along the base portion,
wherein the movable arm has a bridge portion configured to cross the other end portion of the base portion in a thickness direction of the back plate and spaced from the other end portion,
wherein the bridge portion has a pressure receiving portion configured to come in contact with the detection unit moving toward a mounting position thereof on the back plate while the second holding portion is positioned at the restricting position and thereby to move the movable arm so that the second holding portion is moved from the restricting position to the release position,
wherein the base portion has a stopper for restricting movement of the movable arm by abutting against the bridge portion moving in accordance with movement of the movable arm.

4. The brake pad assembly according to claim 3 , wherein a part of an edge of a first opening portion provided in the bridge portion is an abutting portion configured to abut against the stopper.

5. A caliper, comprising:
a brake pad assembly, comprising:
a brake pad comprising a lining configured to come in contact with a slide surface of a disk rotor and a back plate having a first surface and a second surface opposite to the first surface, wherein the lining is fixed on the first surface;
a detection unit attached to the back plate and configured to detect wear of the lining; and
a retainer configured to detachably attach the detection unit to the back plate,
the retainer comprising:
a base portion in contact with the second surface;
a first holding portion for holding the retainer at a predetermined position on the back plate;
a second holding portion provided to be movable between a restricting position, at which the detection unit is restricted from being separated from the back plate, and a release position, at which the detection unit can be attached to or detached from the back plate;
an urging portion for elastically urging the second holding portion from the release position toward the restricting position; and
an operating portion configured to be moved by an external force applied thereon and thus to move the second holding portion from the restricting position to the release position;
the caliper further comprising a support member provided with a second opening portion and configured to movably support the brake pad,
wherein the operating portion is provided to be operated via the second opening portion, and the detection unit is provided to be attached or detached via the second opening portion,
wherein the retainer has an elastically deformable movable arm that protrudes from one end portion of the base portion, has the second holding portion and the operating portion, and is configured to function as the urging portion,
wherein the movable arm has an extension portion positioned spaced from the second surface and extending toward the other end portion of the base portion along the base portion,
wherein the movable arm has a bridge portion configured to cross the other end portion of the base portion in a thickness direction of the back plate and spaced from the other end portion,
wherein the base portion has a stopper for restricting movement of the movable arm by abutting against the bridge portion moving in accordance with movement of the movable arm.

6. The caliper according to claim 5 , wherein a part of an edge of a first opening portion provided in the bridge portion is an abutting portion configured to abut against the stopper.

Assignees

• Advics Co Ltd

Inventors

• Isshiki Tadashi

Classifications

• F16D65/0973 Primary

  not subjected to brake forces · CPC title

• F16D65/02

  Braking members; Mounting thereof (friction linings or attachment thereof F16D69/00) · CPC title

• F16D66/02

  Apparatus for indicating wear · CPC title

• F16D66/027

  Sensors therefor · CPC title

• F16D65/183

  with force-transmitting members arranged side by side acting on a spot type force-applying member · CPC title