Corrosion prevention device for vehicle brake unit

Abstract

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).

Description

technical field [0001] The present invention relates to an anticorrosion device for a brake unit for a vehicle such as an automobile, and more particularly to an anticorrosion device for a brake unit for a vehicle that prevents the occurrence and aggravation of corrosion of metal parts configured to generate braking force based on frictional sliding Metal parts of brake units for vehicles. Background technique [0002] Conventionally, antirust treatment methods for preventing rust as corrosion occurring in metal parts constituting brake units for vehicles such as automobiles have been widely practiced. As such an anti-rust treatment method, for example, a rotary brake member of a vehicle brake device and a anti-rust treatment method thereof disclosed in Patent Document 1 below are known. The rotating braking member of the conventional vehicle braking device and its antirust treatment method are as follows. Rust is easily generated on the sliding surface of the brake drum o...

AI Technical Summary

Problems solved by technology

As a more specific usage situation, for example, when the vehicle is parked in the garage at home, the rain falls on the disc brake rotors, brake drums, hub bearings, hubs, etc. due to rain, and corrosion is likely to occur ( rust)

In addition, when the vehicle is parked for a long period of time in the state where corrosion (rust) has occurred in this way, there is a possibility that the corrosion (rust) that has occurred will intensify to a wider area.

[0005] In this way, under normal vehicle usage conditions, when corrosion (rust) occurs on the metal parts constituting the vehicle brake unit, specifically the disc brake rotor, brake drum, hub bearing, hub, etc. Deteriorates and destroys the good braking feel when braking force is produced

In particular, when corrosion (rust) occurs on the disc brake rotor that can be seen from the outside through the opening formed on the wheel (more specifically, the wheel) of the vehicle, the appearance of the vehicle tends to deteriorate. When corrosion (rust) occurs on the friction sliding surface of the disc brake rotor or brake drum, useless vibration occurs when the braking force is generated (so-called strong chattering phenomenon), and the driver is likely to feel uncomfortable and unable to get a good braking feel

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