CORROSION PREVENTION DEVICE FOR VEHICLE BRAKE UNIT

WIPO Patent Application WO/2012/140717

A1

In the present invention, a vehicle brake unit (10) is provided with a brake drum (11) as a metal rotating member, a brake shoe (12) as a friction engagement means, and a parking brake mechanism (20) that causes the shoe (12) to engage by friction with a friction sliding surface (11a) of the drum (11) in response to operation of a parking brake by a driver. This brake unit (10) is also provided with a corrosion prevention device (30) that comprises a permanent magnet (31) and a coil (32) that constitute a power generation means, a battery (33) as a power storage means, and an electrode (34) as a means for allowing electrical conduction. The corrosion prevention device (30) uses power that is generated through flux variation by the permanent magnet (31) and the coil (32) and that is stored in the battery (33) to apply prescribed electrical power to the drum (11) via the electrode (34) that becomes electrically connected as a result of friction engagement, caused by the parking brake mechanism (20), of the shoe (12) with the friction sliding surface (11a), thereby electrically preventing corrosion of the metal members of the brake unit (10).

NISHIDA NAOTAKA (JP)
TURUBUCHI SATORU (JP)
KARASHIMA YUTA (JP)
HIRAMATSU SACHIO (JP)
ITO TAKAHIRO (JP)

PCT/JP2011/059013

October 18, 2012

April 11, 2011

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TOYOTA MOTOR CO LTD (JP)
NISHIDA NAOTAKA (JP)
TURUBUCHI SATORU (JP)
KARASHIMA YUTA (JP)
HIRAMATSU SACHIO (JP)
ITO TAKAHIRO (JP)

F16D51/00; B60T1/10; C23F13/00; F16D55/00; F16D63/00

JPH1129886A	1999-02-02
JPH0622110U	1994-03-22
JP2002250377A	2002-09-06
JP2006347513A	2006-12-28
JP2011057124A	2011-03-24

PROSPEC PATENT FIRM (JP)
Patent business corporation Pros Peck patent firm (JP)

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