| 摘要 |
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). |
