Nippon Steel Sumitomo Metal Corporation

Ryouichi Kimura

Kazuaki Fujita

A parking brake reduced in size and simplified is installed on a rod-protruding side of a cylinder of a caliper braking device. A second piston is provided within the second cylinder that is coaxially coupled with the cylinder and movable coaxially relative to the rod. A one-way clutch is provided to switch ON/OFF due to a releasing/pressing by the second piston with respect to a switch disposed facing a cylinder side surface of the second piston. A parking operation auxiliary spring is provided on the side of the cylinder within a second cylinder, and a manual release piston is provided in a space of the second cylinder. A parking release lever pushes a manual release rod at the tip end of the manual release piston, pushing the second piston in the direction of retraction of the rod, at the same time as the manual release rod pushes into the rod.

Parking brake device in caliper brake device for railway vehicle

A tip of a pneumatic brake cylinder device is attached rotatably at a base side of a caliper body, and a base end of a first brake lever is attached rotatably to an end part of a cylinder at a side opposite to where the rod protrudes. A center part of the first brake lever is rotatably attached to the body. A front part end of a second brake lever is rotatably attached to a tip of the body, and the base ends thereof come into contact with a tip of the first brake lever. A brake lining and a brake head are attached on an inner surface at a tip of a pressing-force transmission member disposed at a center part front part of the second brake lever. A torque-receiving pin tip is immobilized at the brake head, and a shaft is held on the body via a spherical washer.

Growing community of inventors

Tokyo, Japan

Ryouichi Kimura