# US 11,078,976 B2 · Disc brake

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- Number: US 11,078,976 B2
- Document ID: US11078976B2
- Status: Granted
- Kind: B2
- Application number: 16/434,798
- Filed: 2019-06-07
- Published: 2020-01-09
- Granted: 2021-08-03
- Earliest claimed: 2018-07-06
- Assignees: Toyota Jidosha Kabushiki Kaisha
- Applicants: Toyota Jidosha Kabushiki Kaisha
- Inventors: Tomohiro Yokoyama
- Web page: https://patentgrep.com/patent/US11078976B2

## CPC

- F16D 55/2262: {the axial movement being guided by open sliding surfaces, e.g. grooves}
- B60T 1/065: {employing disc (B60T1/062 takes precedence)}
- F16D 65/183: {with force-transmitting members arranged side by side acting on a spot type force-applying member}
- F16D 2065/1396: {Ancillary resilient elements, e.g. anti-rattle or retraction springs}
- F16D 2121/04: acting on a piston-type actuator, e.g. for liquid pressure
- F16D 2125/06: Pistons
- F16D 2127/02: Release mechanisms
- F16D: COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- B60T: VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL (electrodynamic brake systems for vehicle, in general B60L; brakes per se, i.e. devices where braking effect occurs, including ultimate brake actuators, F16D); ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES

## Abstract

A disc brake of a floating type includes: an inner pad and an outer pad respectively located on opposite sides of a rotor rotatable with a wheel; a pressing device configured to press the inner pad and the outer pad against the rotor; and a housing mounted on a non-rotating member and holding the pressing device. The pressing device includes: a first pressing member movable toward the rotor; a second pressing member movable away from the rotor; and a frame having a substantially frame shape and including (i) a first side portion opposed to the second pressing member and (ii) a second side portion engaged with the outer pad and movable together with the outer pad in a direction parallel with a rotation axis of the rotor. The disc brake includes a return spring provided between the frame and one of the housing and the inner pad.

## Claims

### Claim 1

A disc brake of a floating type, comprising:
an inner pad and an outer pad respectively located on opposite sides of a rotor rotatable with a wheel;
a pressing device configured to press the inner pad and the outer pad against the rotor, and
a housing mounted on a non-rotating member and holding the pressing device,
wherein the pressing device comprises:
a first pressing member movable toward the rotor;
a second pressing member movable away from the rotor; and
a frame comprising (i) a first side portion opposed to the second pressing member and (ii) a second side portion engaged with the outer pad and movable together with the outer pad in a direction parallel with a rotation axis of the rotor, and
wherein the disc brake comprises a return spring provided between the frame and the inner pad,
wherein one end portion and another end portion of the return spring extend respectively in directions substantially perpendicular to each other in front view,
wherein the frame comprises a frame-side hole extending substantially in a radial direction of the rotor,
wherein the inner pad comprises:
a friction engageable member comprising a friction engageable surface frictionally engageable with the rotor; and
a back board holding the friction engageable member,
wherein the back board comprises a pad-side hole extending substantially in a direction orthogonal to the radial direction of the rotor,
wherein the one end portion of the return spring is inserted in the frame-side hole and held by the frame, and
wherein said another end portion of the return spring is inserted in the pad-side hole and held by the inner pad.

### Claim 2 (depends on 1)

The disc brake according to claim 1,
wherein the frame is held by the housing via an engageable portion so as to be movable relative to the housing in the direction parallel with the rotation axis of the rotor,
wherein the engageable portion comprises: an engageable recessed portion formed in the housing; and an engageable protrusion formed on the frame, and
wherein the one end portion of the return spring is mounted on the engageable protrusion formed on the frame.

### Claim 3 (depends on 1)

The disc brake according to claim 1,
wherein the housing comprises a stopper configured to define an initial position of at least one of the frame and the inner pad.

### Claim 4 (depends on 1)

The disc brake according to claim 1,
further comprising
a second return spring that is a return spring different from the first return spring and provided between the housing and the frame.