Disc brake device

Patent metadata

Field	Value
Publication number	US-9822832-B2
Application number	US-201414786393-A
Country	US
Kind code	B2
Filing date	Apr 24, 2014
Priority date	Apr 25, 2013
Publication date	Nov 21, 2017
Grant date	Nov 21, 2017

Abstract

A disc brake device includes flat springs assembled in a support body and holding the brake pad back plates. The flat springs have a C-shaped part provided with: a connection surface part comprising a pad-receiving surface part; an outer circumferential surface part extending along the rotor circumferential direction from the end region of the connection surface part in the rotor radially outward direction; and an inner circumferential surface part extending along the rotor circumferential direction from the end region of the connection surface part in the rotor radially inward direction. Each flat spring also has a tongue-shaped part that: extends towards the connection surface part from the tip region of the inner circumferential surface part in the rotor circumferential direction; elastically engages an inner circumferential wall of a recess at a tip region of the tongue-shaped part; and biases the pad-receiving surface part towards a base wall of the recess.

First claim

The invention claimed is:

1. A disc brake device comprising:
a disc rotor configured to rotate integrally with wheels;
a support member assembled to a vehicle body;
a pair of brake pads disposed to sandwich part of the disc rotor and assembled to the support member so as to be moveable rotor-axially and rotor-circumferentially; and a push member configured to push a backing plate of each of the brake pads toward the disc rotor, wherein
the backing plate of each of the brake pads being provided, at a rotor circumferential end, with a protrusion projecting in the circumferential direction of the rotor, the support member being provided with a recess accommodating the protrusion at the backing plate so as to be movable rotor-axially and rotor-circumferentially, the protrusion and the recess being provided therebetween with a leaf spring, said leaf spring being accommodated in the recess and assembled to the support member and retaining the backing plate, and
the protrusion having a rotor circumferential tip end set to engage so as to transmit torque, with a base wall of the recess via a pad-receiving surface part of the leaf spring, wherein
the leaf spring includes a C-shaped part having a connection surface part provided with the pad-receiving surface part, an outer circumferential surface part extending rotor-circumferentially from a rotor radially outward end region of the connection surface part, and an inner circumferential surface part extending rotor-circumferentially from a rotor radially inward end region of the connection surface part, a radially innermost portion of the connection surface part being in contact with the support member and forming an acute angle with the inner circumferential surface part, and
the leaf spring further includes a tongue-shaped part that extends from a rotor circumferential tip region of the inner circumferential surface part toward the connection surface part, and the tongue-shaped part has a tip region elastically engaging with a side wall of the recess, and biases the pad-receiving surface part toward the base wall of the recess,
wherein the tongue-shaped part comprises a bent tongue that is provided as a cut part at part of the inner circumferential surface part, and
the rotor circumferential tip region of the inner circumferential surface part and the cut part extend to the rotor radially inward direction from the side wall of the recess in the state where the protrusion is assembled in the recess.

2. The disc brake device according to claim 1 , wherein
the tongue-shaped part is formed as an extension, by a predetermined amount, of the part of the inner circumferential surface part.

3. The disc brake device according to claim 1 , wherein
the tip region of the tongue-shaped part is bent to curve an engagement surface of the tongue-shaped part with the side wall of the recess.

4. The disc brake device according to claim 1 , wherein
the connection surface part of the leaf spring is provided with support retentive parts elastically sandwiching along a rotor axis, the recess at the support member, so as to be rotor radially spaced apart from the pad-receiving surface part.

5. The disc brake device of claim 1 , wherein the recess further includes a second side wall facing the side wall and connected to the side wall by the base wall.

6. The disc brake device of claim 1 , wherein an intersection of the base wall with the side wall is abutted by the C-shaped part.

Assignees

• Takeo Yuichi
• Ishimaru Yoshitaka
• Kamiya Yosuke
• KOMIZO Yohei
• Advics Co Ltd

Inventors

• Takeo Yuichi
• Ishimaru Yoshitaka
• Kamiya Yosuke
• KOMIZO Yohei

Classifications

• F16D55/226

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

• F16D55/2265

  the axial movement being guided by one or more pins {engaging bores in the brake support or the brake housing} · CPC title

• F16D65/0972 Primary

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