BRAKE CYLINDER DEVICE AND DISC BRAKE DEVICE

WIPO Patent Application WO/2012/005149

A1

Disclosed is a compact brake cylinder device which, while avoiding increases in the size of the device, is capable of increasing the braking force outputted from a brake output unit which moves together with a rod. A rod (22) is provided inside of a cylinder body (20) so as to freely move in the advancing and retracting directions of the cylinder shaft direction. A piston (24) partitions a pressure chamber (44) inside of the cylinder body (20), surrounding the circumference of the rod (22), and moves in a linear direction parallel to the movement direction of the rod (22). By supplying a pressure fluid to the pressure chamber (44), the piston (24) resists the biasing force of a biasing spring (23) and moves in the retracting direction relative to the cylinder body (20). At that time, a force-multiplication mechanism (25) converts the linear direction drive force generated by the piston (24) to a rotational direction, moves the rod (22) in the advancing direction, and multiplies the drive force from the piston (24) to act on the rod (22). A brake output unit (21) moves together with the rod (22) in the advancing direction and outputs a braking force.

JPS5968829	[Title of the device] Caliper structure of a disk brake
JPH0814288	FITTING BODY WITH BOOT

OHNO TOMOYA (JP)
NAKAMURA JYOICHI (JP)

PCT/JP2011/064883

January 12, 2012

June 29, 2011

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NABTESCO CORP (JP)
OHNO TOMOYA (JP)
NAKAMURA JYOICHI (JP)

F16D55/224; F16D65/14; F16D65/18; F16D65/74

JP2009138826A	2009-06-25
JP2008261439A	2008-10-30
JP2007131203A	2007-05-31
JP2006315422A	2006-11-24

ONEDEE IP PARTNERS (JP)
Patent business corporation Wang Dee IP partners (JP)

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