发明授权
US3756564A Power control winch 失效
电源控制

Power control winch
摘要:
A winch having an integral control system wherein the clutch and brake mechanism are hydraulically actuated and the hydraulic actuating system is positioned in the winch housing. The system includes the oil supply, the control valve, the hydraulic pump and an accumulator. The pump is self-compensating and is mounted to be continually actuated by a shaft in the drive train to the winch drum. To reduce the volume of hydraulic fluid normally required in a hydraulic system and to improve the reliability, the valve is a unique no-leak type with the inlet through a bore in the valve spool and an outlet located along only one side of the spool and the valve is used in conjunction with an accumulator which allows release of the brake after shut down of the drive train. The brake mechanism comprises multi-wrap brake bands which are spring-actuated and hydraulically released, the multi-wrap enables relatively high braking force produced by a minimal spring actuating force.
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