US 10,240,650 B2Granted

Parking brake device in caliper brake device for railway vehicle

AssigneeNippon Steel & Sumitomo Metal Corporation

InventorsRyouichi Kimura, Kazuaki Fujita

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Abstract

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.

Claims5

Dependent claims

A parking brake device in a caliper brake device for a railway vehicle disposed on a rod protruding side of a rod of a piston provided to move freely within a brake cylinder, for decelerating or stopping a railway vehicle while traveling,

the parking brake device comprising a structure for holding the rod protruded from the bake cylinder and for preventing the rod from retracting, the structure being achieved by switching a one-way clutch from OFF to ON by turning a switch, which is installed on an inner peripheral side portion of a side wall of the brake cylinder, from OFF to ON by a spring force of a parking operation auxiliary spring disposed in a second cylinder coupled in series and coaxially with the brake cylinder, the OFF position of the one-way clutch not constraining a protruding/retracting movement of the rod and the ON position of the one-way clutch allowing protruding movement of the rod but preventing retracting movement.

Dependencies are inferred from the claim text.

Facts

Application: 14/898,494Filed 19 Jun 2014
Priority: JP 2013-12869619 Jun 2013
Published: US 2016/0131214 A112 May 2016
Granted: 26 Mar 2019
Term ends: Not estimatedThe source records don’t support an estimate.

Classification13 codes

F16D 65/18
Arranged in or on the brake: adapted for drawing members together , e.g. for disc brakes
B60T 17/228
Devices for monitoring or checking brake systems; Signal devices: for railway vehicles
B61H 5/00
Applications or arrangements of brakes with substantially radial braking surfaces pressed together
F16D 55/2245
With a common actuating member for the braking members: in which the common actuating member acts on two levers carrying the braking members, e.g.…