Patent ID: 6093126
Filing Date: 2000-07-25
Classification: F16H,Y10T

Abstract:
A transmission device having a worm/worm clutch unit comprising:an enveloping type of worm gear with number of gear teeth less than 24;an enveloping worm having at least one screw thread engaged by a worm gear;wherein said enveloping angle of said worm is greater than 15 degrees for one revolution of said thread of said enveloping worm so that said thread extends from top of the said worm gear to periphery of said worm gear.wherein said worm and worm gear are self-locking against driving from said worm gear;means for rotating said worm about its axis of rotation relative to said worm gear to provide unlocking motion;said worm gear being connected to one member of a differential gear set;wherein two other members of said differential gear set provide an input and an output.