Power plants – Pressure fluid source and motor – Having a mechanical clutch or brake device in the power train
Patent
1995-08-15
1996-07-02
Nguyen, Hoang
Power plants
Pressure fluid source and motor
Having a mechanical clutch or brake device in the power train
60493, 60494, 91447, 91 45, F16D 3102, F15B 1526
Patent
active
055310710
ABSTRACT:
A hydraulic system comprises a mechanical brake assembly having a brake piston engageable with an output rotation shaft of a hydraulic motor, a cylindrical casing having the brake piston slidably received therein and a brake spring resiliently urging the brake piston to engage with the output rotation shaft of the hydraulic motor. The brake piston and the cylindrical casing collectively define a main hydraulic chamber held in fluid communication with a release fluid passageway which is communicable with a hydraulic pump and a reservoir tank through a shuttle valve and a directional control valve. The brake piston and the cylindrical casing further collectively define a secondary hydraulic chamber held in fluid communication with the release fluid passageway through a fluid feed/return passageway on which a brake resistance restrictor provided for restricting flow of the working fluid in the fluid feed/return passageway. The pressure of the working fluid in the secondary hydraulic chamber is exerted on the brake piston so as to resist the resilient force of the brake spring of the mechanical brake assembly. If the hydraulic system thus constructed is applied, for instance, to a driving apparatus of a crawler vehicle, the hydraulic system is capable of effectively preventing the crawler vehicle from incurring a mighty shock at the time when the crawler vehicle is decelerated and stopped.
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Nguyen Hoang
Teijin Seiki Co. Ltd.
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