Disk brake pad and disc brake assembly

Patent metadata

Field	Value
Publication number	US-9945435-B2
Application number	US-201414513353-A
Country	US
Kind code	B2
Filing date	Oct 14, 2014
Priority date	Oct 15, 2013
Publication date	Apr 17, 2018
Grant date	Apr 17, 2018

Abstract

A disc brake pad includes a lining and a back plate supporting the lining and having a projecting lug portion and a torque transfer surface. The projecting lug portion projects towards a rotor exit side. The torque transfer surface is disposed at a side edge portion which is situated further radially inwards than the lug portion. The projecting lug portion includes a first projecting arc-shaped surface portion which is disposed at a radially innermost portion of a radially inner surface of the lug portion. A portion of the torque transfer surface which lies near to a radially outer end of the torque transfer surface and which is situated further radially inwards than both of the radially inner surface and an action line of a brake tangential force exerted on braking is most projected toward the rotor exit side on the torque transfer surface.

First claim

What is claimed is:

1. A disc brake pad, configured to be supported to a pad supporting member so as to move in an axial direction of a rotor attached to a wheel of a vehicle, the disc brake pad comprising:
a lining; and
a back plate, supporting a rear surface of the lining, having a projecting lug portion and a torque transfer surface at a side edge portion of the back plate which is situated at an exit side of the rotor when the vehicle is moving in a forward direction such that a rotational direction of the rotor is counterclockwise, wherein
the projecting lug portion projects towards the exit side of the rotor,
the torque transfer surface is disposed at a portion of the side edge portion which is situated further inwards than the lug portion in a radial direction of the rotor,
the projecting lug portion includes a first projecting arc-shaped surface portion which is disposed radially inward of a radially inner surface of the lug portion,
a portion of the torque transfer surface which lies near to a radially outer end of the torque transfer surface and which is situated further radially inwards than both of the radially inner surface and an action line of a brake tangential force exerted on braking includes a second projecting arc-shaped surface portion at a radially outer end portion of the torque transfer surface, an apex of the second projecting arc-shaped surface portion being projected toward the exit side of the rotor more than any other portion of the torque transfer surface, and
the torque transfer surface includes an inclined surface portion which is inclined towards an entrance side of the rotor from the second projecting arc-shaped surface portion as the inclined surface portion extends further radially inwards such that a radially outer side end of the inclined surface portion, which is connected to the second projecting arc-shaped surface portion, is projected more than a radially inner side end of the inclined surface portion in a circumferential direction of the rotor.

2. The disc brake pad according to claim 1 , wherein
the side edge portion of the back plate includes a recess portion which is concaved towards an entrance side of the rotor between the lug portion and the torque transfer portion.

3. A disc brake assembly comprising:
a pad supporting member; and
a pair of pads, each of which is the disc brake pad according to claim 1 , and which are supported on the pad supporting member so as to move in an axial direction in relation thereto, and a piston which presses both the pads individually against both side surfaces of a rotor, wherein
the pad supporting member includes a guiding, recessed groove configured to be brought into loose engagement with the lug portion, at a rotor exit side thereof, and
the pad supporting member includes a torque bearing surface configured to be brought into abutment with the torque transfer surface, at a portion thereof which is situated further radially inwards than the guiding recessed groove.

4. The disc brake assembly according to claim 3 , wherein
the second projecting arc-shaped surface portion is brought into abutment with the torque bearing surface in line contact.

5. The disc brake assembly according to claim 3 , wherein
the inclined surface portion of the torque transfer surface is inclined with respect to an extending direction of the torque bearing surface.

Assignees

• Akebono Brake Ind

Inventors

• Ueda Masayuki
• Ishiguro Isao

Classifications

• F16D65/092 Primary

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

• F16D55/228 Primary

  with a separate actuating member for each side · CPC title

• F16D65/095

  Pivots or supporting members therefor · CPC title

• F16D55/226

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

• F16D65/0972

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