Pad clip, assembly of pad clip and return spring, and floating type disc brake

Patent metadata

Field	Value
Publication number	US-11015668-B2
Application number	US-201816224849-A
Country	US
Kind code	B2
Filing date	Dec 19, 2018
Priority date	Dec 28, 2017
Publication date	May 25, 2021
Grant date	May 25, 2021

Abstract

A pad clip for a disc brake includes: a radial pressing portion which is disposed at inward than a clamping portion in a radial direction and presses outward in the radial direction an ear portion; a circumferential pressing portion which extends outward in the radial direction from a radially outer side portion of the clamping portion, an intermediate portion thereof being folded back inward in radial and circumferential directions of the rotor, and a tip end portion thereof pressing the pad inward in the circumferential direction; and a spring holding portion which protrudes outward in the circumferential direction from the radially outer side portion of the clamping portion than a base portion of the circumferential pressing portion, and holds a return spring which is made of wire material and presses the pad away from the rotor in an axial direction of the rotor.

First claim

The invention claimed is:

1. A pad clip for a disc brake, comprising:
a clamping portion which has a substantially U-shaped cross section and is configured to elastically clamp a projection portion provided on a circumferentially inner side surface of a pad guide portion of a support from both sides thereof in a radial direction of a rotor;
a radial pressing portion which is disposed inward from the clamping portion in the radial direction, and the radial pressing portion is configured to press outward in the radial direction on an ear portion provided on a circumferentially outer side portion of the pad;
a circumferential pressing portion which extends outward in the radial direction from a radially outer side portion of the clamping portion, an intermediate portion thereof being folded back inward in a circumferential direction of the rotor and being folded back inward in the radial direction, and a tip end portion thereof being configured to press the pad inward in the circumferential direction at a vicinity of the clamping portion in the radial direction; and
a spring holding portion including a placing plate portion and a locking piece, the spring holding portion protrudes outward in the circumferential direction from the radially outer side portion of the clamping portion from a base portion of the circumferential pressing portion, and is configured to hold a return spring which presses the pad away from the rotor in the axial direction of the rotor, the placing plate portion extends outward in the circumferential direction from the radially outer side plate portion, and the locking piece is bent outward in the radial direction from an circumferentially outer side portion of the placing plate portion,
wherein the clamping portion includes a pawl piece which is bent outward in the circumferential direction on an axial end portion of the clamping portion so as to elastically press the projection portion from an axial side thereof.

2. The pad clip according to claim 1 , wherein an engaging portion configured to engage an end portion of the return spring is provided in the base portion of the circumferential pressing portion.

3. The pad clip according to claim 2 , wherein the engaging portion is a through hole or a cutout.

4. The pad clip according to claim 2 , wherein the engaging portion is a triangular through hole.

5. The pad clip according to claim 1 , wherein a restraining portion which is configured to support an elastic force of the return spring in a state before the pad is assembled and to restrain the return spring with respect to the pad clip, is provided outward in the radial direction from the clamping portion and on an axial side of the base portion of the circumferential pressing portion.

6. The pad clip according to claim 1 , wherein the circumferential pressing portion includes a pair of pressing arms and a pad abutting portion,
the pressing arms extend from a base end portion of the circumferential pressing portion to the intermediate portion of the circumferential pressing portion,
each of the pressing arms has an inverted U-shape,
the pressing arms are spaced apart from each other in the axial direction of the rotor, and
the pad abutting portion is provided at the tip end portion of the circumferential pressing portion and connects the pair of pressing arms to each other in the axial direction.

7. The pad clip according to claim 6 , wherein width dimensions of the pair of pressing arms in the axial direction are the same.

8. The pad clip according to claim 1 , further comprising:
a plate-shaped guide plate portion which extends inward in the radial direction from a radially inner side portion of the clamping portion and is configured to be arranged between a tip end surface of the ear portion and the circumferentially inner side surface of the pad guide portion,
wherein the guide plate portion is positioned outward in the circumferential direction from the base portion of the circumferential pressing portion.

9. The pad clip according to claim 1 , wherein the radial pressing portion includes a transverse V shape that extends in an axial direction of the rotor.

10. An assembly of a pad clip and a return spring, comprising:
the pad clip according to claim 1 ; and
a return spring made of wire material,
wherein a part of the return spring is held by the spring holding portion, and the return spring is held on the pad clip in a state of being arranged outward in the circumferential direction from the base portion of the circumferential pressing portion.

11. The assembly of the pad clip and the return spring according to claim 10 , wherein
the return spring includes a coil portion, and
the coil portion is held on the spring holding portion in a state where a central axis of the coil portion is oriented in the circumferential direction.

12. The assembly of the pad clip and the return spring according to claim 10 , wherein
the return spring includes a spring arm which is arranged between the clamping portion and the radial pressing portion in the radial direction and extends toward the rotor in the axial direction, and
a tip end portion of the spring arm is bent inward in the circumferential direction.

13. The assembly of the pad clip and the return spring according to claim 10 , wherein
an engaging portion which is a triangular through hole is provided in the base portion of the circumferential pressing portion, and
an end portion of the return spring is pressed to an opening edge of the engaging portion based on an elastic restoring force of the return spring.

14. A floating disc brake, comprising:
a support which is fixed to a vehicle body so as to be adjacent to a rotor rotating together with a vehicle wheel;
a pair of pads which is supported to be movable in an axial direction of the rotor with respect to the support in a state of being arranged on both axial sides of the rotor;
a caliper which is supported to be movable in the axial direction with respect to the support;
pad clips which are respectively provided between a circumferentially inner side surface of a pad guide portion of a circumferentially outer side portion of the support and a circumferentially outer side portion of each pad, the pad guide portion being arranged on an axial side of the rotor; and
return springs which are respectively held on each of the pad clips and configured to press each pad away from the rotor in an axial direction of the rotor,
wherein at least one pair of the pad clip and the return spring is the assembly of the pad clip and the return spring according to claim 10 .

Assignees

• Akebono Brake Ind

Inventors

• Sekiguchi Akihiko
• Minoshima Yuta
• Kobayashi Daisuke

Classifications

• F16D65/0976

  acting on one pad only · CPC title

• F16D65/0972

  transmitting brake reaction force, e.g. elements interposed between torque support plate and pad · CPC title

• F16D55/226

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

• F16D65/0975 Primary

  Springs made from wire · CPC title

• F16D65/097

  Resilient means interposed between pads and supporting members {or other brake parts} · CPC title