Disc brake

Patent metadata

Field	Value
Publication number	US-9791004-B2
Application number	US-201414198781-A
Country	US
Kind code	B2
Filing date	Mar 6, 2014
Priority date	Mar 6, 2013
Publication date	Oct 17, 2017
Grant date	Oct 17, 2017

Abstract

A disc brake includes a pair of end-side connector parts that connect a pair of cylinder parts across over a disc rotor, and an intermediate connector part that is installed between the end-side connector parts and that connects the pair of cylinder parts across over the disc rotor and brake pads. The brake pads are provided with protrusion segments that are formed at positions that are outer end sides in a rotor radial direction and that protrude in directions separated from middle portions of the brake pads in a rotor rotational direction, and the end-side connector parts are provided with pad engaging faces on which inner regions in the rotor radial direction of the protrusion segments are oppositely disposed and which are formed of the same member as a caliper main body.

First claim

What is claimed is:

1. A disc brake comprising:
at least one pair of brake pads disposed to be opposite to a disc rotor; and
a caliper main body configured to support the brake pads so as to be capable of being pressed to the disc rotor,
wherein the caliper main body includes:
a pair of cylinder parts in which pistons adapted to press the brake pads are housed;
a pair of end-side connector parts configured to extend over the disc rotor at ends in a rotor rotational direction of the pair of cylinder parts and to connect the pair of cylinder parts; and
an intermediate connector part installed between the pair of end-side connector parts and to connect the pair of cylinder parts across over the disc rotor and the pair of brake pads, wherein

a pad spring is installed between the intermediate connector part and the pair of brake pads so as to bias the pair of brake pads;
at least one of the pair of brake pads includes a pair of protrusion segments formed at positions that are outer end sides in a rotor radial direction and to protrude in directions separated from middle portions of the brake pads in the rotor rotational direction, and
the pair of end-side connector parts respectively includes:
disc path parts which the disc rotor passes through, and pad guides which are formed at both sides in a rotor axial direction of the disc path part and which movably support the pair of brake pads in the rotor axial direction, and
pad engaging faces on which inner regions in the rotor radial direction of the protrusion segments are oppositely disposed and which support the brake pads in the rotor radial direction are formed of the same member as the caliper main body,

wherein the inner regions in the rotor radial direction of the protrusion segments and the pad engaging faces face each other and are parallel with each other,
wherein the pad spring is arranged so that a biasing force of the pad spring is transferred to the pad engaging faces via the inner regions in the rotor radial direction of the protrusion segments, and
wherein at least one of the pad engaging faces of the pair of end-side connector parts is located at an outer side in the rotor radial direction relative to the disc rotor, crosses the disc rotor to continue to both sides in the rotor axial direction and forms an end face of the pad guide located at the outer side in the rotor radial direction.

2. The disc brake according to claim 1 , wherein:
pad-side cutouts located at inner sides in the rotor radial direction relative to the protrusion segments and to be recessed toward middle sides of the brake pads in the rotor rotational direction are formed at both sides in the rotation direction of the brake pad, respectively.

3. The disc brake according to claim 2 , wherein caliper-side cutouts located at positions matching the disc path parts in the rotor axial direction and to be partly recessed toward an outside of the caliper main body in the rotor rotational direction are formed on at least one of the pad engaging faces.

4. The disc brake according to claim 3 , wherein:
the caliper-side cutouts are formed at both of the pad engaging faces, and
a distance between a face of one pad-side cutout in the rotor rotational direction and a face of the protrusion segment in the rotor rotational direction which is disposed at a side opposite to the one pad-side cutout in the rotor rotational direction is shorter than a distance between one caliper-side cutout and the other caliper-side cutout which faces the one caliper-side cutout.

5. The disc brake according to claim 1 , wherein:
at least one of the pad engaging faces includes caliper-side cutouts formed at positions matching the disc path parts in the rotor axial direction and to be partly recessed toward an outside of the caliper main body in the rotor rotational direction.

6. The disc brake according to claim 1 , wherein:
the caliper main body is formed of the same member as the end-side connector part and the intermediate connector part and is formed in one body with the end-side connector part and the intermediate connector part.

7. The disc brake according to claim 1 , wherein:
at least one of the pair of the end-side connector parts includes one intermediate extension which is disposed at a position matching the disc path part, and
an end face at an outer side of the one intermediate extension in the rotor radial direction and an end face at an outer side of the pad guides in the rotor radial direction have a substantially same plane with the pad engaging face.

8. The disc brake according to claim 7 , wherein:
the other one of the pair of the end-side connector parts includes the other intermediate extension which is disposed at a position matching the disc path part, and
an end face at an outer side of the other intermediate extension and an end face at an outer side of the pad guides in the rotor radial direction have a same plane with the pad engaging face.

9. The disc brake according to claim 1 , wherein:
the pad engaging faces are covered with pad retainers, and
the protrusion segments come into contact with portions of the pad retainers that cover the pad engaging faces.

10. A disc brake comprising:
at least one pair of brake pads disposed to be opposite to a disc rotor; and
a caliper main body configured to support the brake pads so as to be capable of being pressed to the disc rotor,
wherein the caliper main body comprises:
a pair of cylinder parts in which pistons adapted to press the pair of brake pads are housed,
a pair of end-side connector parts configured to extend over the disc rotor at ends in a rotor rotational direction of the pair of cylinder parts and to connect the pair of cylinder parts, and
an intermediate connector part installed between the pair of end-side connector parts and to connect the pair of cylinder parts across over the disc rotor and the pair of brake pads,

wherein the pair of cylinder parts, the pair of end-side connector parts, and the intermediate connector part are formed of the same member,
wherein a pad spring is installed between the intermediate connector part and the pair of brake pads so as to bias the pair of brake pads,
wherein the pair of brake pads include a pair of protrusion segments formed at positions that are outer end sides in a rotor radial direction and to protrude in directions separated from middle portions of the brake pads in the rotor rotational direction, and
wherein the pair of end-side connector parts respectively includes:
disc path parts which the disc rotor passes through, and pad guides which are formed at both sides in a rotor axial direction of the disc path part and which movably support the pair of brake pads in the rotor axial direction, and
pad engaging faces to which inner regions in the rotor radial direction of the pair of protrusion segments are supported are located at an outer side in the rotor radial direction relative to the disc rotor, crosses the disc rotor to continue to both sides in the rotor axial direction and forms an end face of the pad guide located at the outer side in the rotor radial direction,

wherein the inner regions in the rotor radial direction of the protrusion segments and the pad engaging faces face each other and are parallel with each other, and
wherein the pad spring is arranged so that a biasing force of the pad spring is transferred to the pad engaging faces via the inner regions in the rotor radial direction of the protrusion segments.

11. The disc brake according to claim 10 , wherein:
pad-side cutouts located at inner sides in the rotor radial direction relative to the protrusion segments and to be recessed toward middle sides of

Assignees

• Hitachi Automotive Systems Ltd

Inventors

• Nanri Keisuke

Classifications

• F16D2121/02

  Fluid pressure · CPC title

• F16D2055/0016

  Brake calipers · CPC title

• F16D55/228

  with a separate actuating member for each side · CPC title

• F16D2055/0091

  Plural actuators arranged side by side on the same side of the rotor · CPC title

• F16D65/0068 Primary

  Brake calipers · CPC title