Caliper brake apparatus

Patent metadata

Field	Value
Publication number	US-9382956-B2
Application number	US-201214362143-A
Country	US
Kind code	B2
Filing date	Nov 29, 2012
Priority date	Feb 6, 2012
Publication date	Jul 5, 2016
Grant date	Jul 5, 2016

Abstract

A caliper brake apparatus includes a caliper main body that is supported on a vehicle body, a brake lining that advances/retreats relative to the caliper main body and can apply a frictional force by slidingly contacting a disc, a guide plate that supports the brake lining, an anchor pin that supports the guide plate on the caliper main body such that it can freely advance/retreat, a piston that advances/retreats relative to the caliper main body and can press against the brake lining via the guide plate, a diaphragm that abuts a rear surface of the piston and defines a pressure chamber within the caliper main body and elastically deforms due to pressure of compressed air within the pressure chamber so as to move the piston, and a piston plate that supports the piston on the anchor pin such that the piston can freely slide.

First claim

The embodiments of this invention in which an exclusive property or privilege is claimed are defined as follows:

1. A caliper brake apparatus that is configured to sandwich and to apply a frictional force to a disc which is rotatable together with a wheel, the caliper brake apparatus comprising:
a caliper main body that is supported on a vehicle body;
a brake lining that is configured to advance/retreat relative to the caliper main body and to apply the frictional force by slidingly contacting the disc;
a guide plate that supports the brake lining;
an anchor pin that supports the guide plate on the caliper main body such that the guide plate freely advances/retreats;
a piston that is configured to advance/retreat relative to the caliper main body and to press against the brake lining via the guide plate;
an elastic film that abuts a rear surface of the piston, defines a pressure chamber within the caliper main body and elastically deforms due to pressure of a working fluid within the pressure chamber so as to move the piston; and
a piston plate that supports the piston on the anchor pin such that the piston freely slides,
wherein
the piston plate has a sliding hole into which the anchor pin is inserted, and
the piston plate is configured to slide in an axial direction of the anchor pin to move parallel relative to the guide plate.

2. The caliper brake apparatus according to claim 1 , wherein
the piston plate is integrated with the piston.

3. The caliper brake apparatus according to claim 1 , further comprising:
a thermal insulation plate that is provided between the piston and the guide plate to suppress heat transfer from the brake lining to the piston.

4. The caliper brake apparatus according to claim 1 , wherein
a gap is formed between the guide plate and the piston plate in a braking state in which the piston presses against the brake lining.

5. The caliper brake apparatus according to claim 4 , further comprising:
a biasing member in the gap, wherein the biasing member biases the piston plate in a direction away from the guide plate when braking is released.

6. A caliper brake apparatus that is configured to sandwich and to apply a frictional force to a disc which is rotatable together with a wheel, the caliper brake apparatus comprising:
a caliper main body that is supported on a vehicle body;
a brake lining that is configured to advance/retreat relative to the caliper main body and to apply the frictional force by slidingly contacting the disc;
a guide plate that supports the brake lining;
an anchor pin that supports the guide plate on the caliper main body such that the guide plate freely advances/retreats;
a piston that is configured to advance/retreat relative to the caliper main body and to press against the brake lining via the guide plate;
an elastic film that abuts a rear surface of the piston, defines a pressure chamber within the caliper main body and elastically deforms due to pressure of a working fluid within the pressure chamber so as to move the piston;
a piston plate that supports the piston on the anchor pin such that the piston freely slides, wherein a gap is formed between the guide plate and the piston plate in a braking state in which the piston presses against the brake lining; and
a biasing member in the gap, wherein the biasing member biases the piston plate in a direction away from the guide plate when braking is released.

Assignees

• Kayaba Industry Co Ltd
• Kyb Corp

Inventors

• Suzuki Tsutomu
• Ookawara Yoshiyuki

Classifications

• B61H5/00 Primary

  Applications or arrangements of brakes with substantially radial braking surfaces pressed together in axial direction, e.g. disc brakes · CPC title

• F16D55/227

  by two {or more} pins · CPC title

• F16D2121/08

  acting on a membrane-type actuator, e.g. for gas pressure · CPC title

• F16D65/0068 Primary

  Brake calipers · CPC title

• F16D65/78

  Features relating to cooling · CPC title