Winch drive mechanism

Details Winch drive mechanism Winch drive mechanism

1974-11-04

1976-10-12

Scott, Samuel

Machine element or mechanism

Rotary member or shaft indexing, e.g., tool or work turret

Preselected indexed position

F16H 552

Patent

active

039850471

ABSTRACT:
An electric drive motor drives a chain and sprocket speed reducer which, in turn, drives a gyratory speed reducer connected by an overrunning clutch to the winch drum. A pawl of the overrunning clutch is automatically controlled by rotation of the gyratory speed reducer in the drum winding direction to engage the pawl for effecting positive drive of the clutch. Another pawl is spring pressed to effect positive drive of the clutch when the drive means are rotated in the opposite direction to turn the winch drum in the unwinding direction. When the drum is turned in the unwinding direction by pulling out line from the drum, the clutch overruns but provides a drag to prevent freewheeling of the drum. A brake for restraining unwinding rotation of the winch drum under load can be slipped by reversing the rotation of the drive motor to control unwinding rotation of the drum.

REFERENCES:
patent: 1634453 (1927-07-01), Carroll
patent: 1770468 (1930-07-01), Ford
patent: 2083954 (1937-06-01), Kessler
patent: 3184018 (1965-05-01), Christison
patent: 3391907 (1968-07-01), Vogelsang
patent: 3494595 (1970-02-01), Bohan
patent: 3710635 (1973-01-01), Whitehorn
patent: 3771766 (1973-11-01), Pillsbury, Jr.

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