Kyb Corporation

Kayaba Industry Company, Ltd.

Railway Technical Research Institute

Yoshiyuki Ookawara

Tsutomu Suzuki

Hiroaki Wakabayashi

Yasushi Karino

Masanobu Nankyo

A caliper brake apparatus includes: a guide plate that supports a brake shoe; an anchor pin that supports the guide plate and is provided in a caliper main body to be free to advance and retreat; a piston provided in the caliper main body to be free to advance and retreat; a piston plate that is fixed to the piston and supported by the anchor pin; an elastic membrane that is provided so as to define a pressure chamber in the caliper main body, and that moves the brake shoe via the piston, the piston plate, and the guide plate; and an intermediate member disposed between the piston plate and the guide plate. The intermediate member is interposed between the piston plate and the guide plate such that a gap is formed between the piston plate and the guide plate.

Caliper brake apparatus

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.

A caliper brake apparatus includes a piston configured to advance and retreat in accordance with a pressure in a pressure chamber of a caliper main body, a guide plate attached to the piston so as to support a brake shoe, and a fastening member configured to fasten the piston to the guide plate. The fastening member includes a tapered seating surface, and at least one of the piston and the guide plate includes a tapered contact portion on which the seating surface of the fastening member is seated.

A caliper brake apparatus includes a brake lining that advances/retreats relative to a caliper main body supported on a vehicle body and can apply a frictional force by slidingly contacting a disc, an anchor pin that supports a guide plate supporting the brake lining 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 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. The piston includes a plurality of thermal insulation members whose distal ends protrude toward the guide plate.

A caliper brake device includes a brake shoe for exerting a friction force by sliding in contact with a disk, a caliper main body fixed to a vehicle and an actuator for pressing the brake shoe against the disk. The actuator includes an elastic film fixed to the caliper main body, a drive pressure chamber defined by the elastic film and supplied with a fluid, a valve introducing the fluid to the drive pressure chamber, and a piston interposed between the elastic film and the brake shoe. The fluid is supplied to the drive pressure chamber and the elastic film swells toward the brake shoe, whereby the piston brings the brake shoe into sliding contact with the disk. The valve introduces the fluid to the drive pressure chamber when the brake is applied while limiting the discharge of the fluid from the drive pressure chamber when the brake is released.

Caliper brake device for a vehicle

A caliper brake apparatus according to this invention includes: a caliper main body supported on a vehicle body; a brake block that is capable of advancing and retreating relative to the caliper main body and sliding against the disc so as to apply a frictional force to the disc; a pressing mechanism that presses the brake block against the disc using a pressure of a working fluid; and an adjuster that supports the brake block on the caliper main body. The adjuster includes: an anchor pin that is provided to be capable of advancing and retreating relative to the caliper main body and supports the brake block on the caliper main body; a return spring that biases the brake block in a direction heading away from the disc; and a back pressure chamber defined on a back surface of the anchor pin, into which the working fluid is led.

A brake caliper () includes a first caliper arm () that opposes a first frictional surface () of a vehicle wheel () and a second caliper arm () that opposes a second frictional surface () of the same. A movable brake pad () is supported by the first caliper arm () and applies a braking force to the first frictional surface (). A plurality of pistons () which drive the movable brake pad () in accordance with expansion of a diaphragm () provided in the brake caliper (), and a guide member () that guides displacement of the plurality of pistons () in a right-angle direction relative to the first frictional surface () are provided, and therefore the movable brake pad () applies an even braking force to the vehicle wheel () in cooperation with a fixed brake pad () fixed to the second caliper arm ().

Caliper brake device for vehicle

In a vehicle caliper brake device, a brake pad supported by a holder applies a frictional force to a braking surface as a diaphragm actuator is driven. The holder is supported by a caliper main body to be capable of displacing in a displacement direction of the brake pad. The diaphragm actuator includes a piston that is driven by a diaphragm to push the holder. The piston is fixed to the holder using a plurality of screws, and therefore the piston applies a pressing force to the brake pad uniformly without the need for guidance by a guide.

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Sagamihara, Japan

Yoshiyuki Ookawara