Torque shock absorbing device in an electrical motor- speed...

Details Torque shock absorbing device in an electrical motor- speed... Torque shock absorbing device in an electrical motor- speed...

F - Mech Eng,Light,Heat,Weapons

16

F

74/202

F16F 15/12 (2006.01) E05F 15/16 (2006.01) F16D 3/12 (2006.01)

Patent

CA 1269870

A TORQUE SHOCK ABSORBING DEVICE IN AN ELECTRICAL MOTOR-SPEED REDUCER UNIT FOR DRIVING ACCESSORIES IN MOTOR VEHICLES A B S T R A C T The device comprises a worm wheel driven in rota- tion by a worm coupled to the output shaft of a motor-speed reducer, a gear pinion associated with the worm wheel for driving the accessory, and means interposed between the gear pinion and the worm wheel for absorbing the driving torque of the worm wheel when the accessory reaches the end of its travel and stops the rotation of the pinion. The shock absorbing means com- prise a cam fixed to the pinion and having two op- posed surfaces, a pair of shoes in bear- ing relation to the surfaces of the cam and biased thereagainst by a metal spring coaxial with the pinion and the worm wheel and surrounding the shoes, and elements drivenly connected to the worm wheel and transmitting to the shoes and to the cam and gear pinion the driving torque of the worm wheel. This arrangement ren- ders the shock absorbing device insensitive to variations in temperature and avoids any play after a certain period of use.

518993

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