Constant torque friction clutch

Details Constant torque friction clutch Constant torque friction clutch

F - Mech Eng,Light,Heat,Weapons

16

D

192/6

F16D 27/10 (2006.01) F16D 7/00 (2006.01) F16D 27/112 (2006.01)

Patent

CA 1102721

CONSTANT TORQUE FRICTION CLUTCH ABSTRACT OF THE DISCLOSURE A constant torque electromagnetically operated friction clutch including an axially moveable ferromagnetic armature drawn into frictional engagement with an inner body driving the output shaft upon energization of an electromagnetic coil. The torque level transmitted is limited by an arrangement including an intermediate member which is rotatably connected to the armature by pins received at openings in the armature while allowing a predetermined extent of relative axial movement before heads on the pins abut the openings. The intermediate member is drivingly connected to the input member by camming balls which react to torque being transmitted, forcing the intermediate member to move axially, which movement is resisted by a spring force, When the intermediate member reaches the null extent of relative axial travel allowed by the pins, any increase in transmitted torque decreases the engage- ment pressure of the armature with the inner body set the maximum torque at that level.

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