BRAKE CYLINDER DEVICE AND DISK BRAKE DEVICE

Title:

BRAKE CYLINDER DEVICE AND DISK BRAKE DEVICE

Document Type and Number:

WIPO Patent Application WO/2013/077273

Kind Code:

A1

Abstract:

Provided is a compact brake cylinder device capable of increasing the brake force output from a brake output unit that moves along with a rod, without requiring the device to be made larger. A piston (24) sections off a pressure chamber (43) within a main cylinder (20a), surrounds the axial periphery of a rod (22), and moves in a direct line parallel with the direction of motion of the rod (22). With the supply of a pressure fluid to the pressure chamber (43) the piston (24) moves outward relative to the main cylinder (20a) in opposition to the biasing force of a rod-biasing spring (23). An oscillating member (46) of a force-multiplying mechanism (25) is biased by the piston (24) moving in the outward direction, oscillates, and biases the rod (22), causing the rod (22) to move in the forward direction. In this way, the force-multiplying mechanism (25) multiplies the drive force from the piston (24) so as to act on the rod (22). The brake output unit (21) moves in the forward direction along with the rod (22) and outputs brake force.

Inventors:

YANO MASATAKA (JP)
OHNO TOMOYA (JP)

Application Number:

PCT/JP2012/079827

Publication Date:

May 30, 2013

Filing Date:

November 16, 2012

Export Citation:

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Assignee:

NABTESCO CORP (JP)

International Classes:

F16D55/2255; F16D65/14; F16D65/18; F16D65/56; B61H5/00; B61H15/00

Foreign References:

JP2009545712A	2009-12-24
JPS61175330A	1986-08-07
JP2007131203A	2007-05-31
JP2011505534A	2011-02-24

Other References: