Constant torque friction clutch

Details Constant torque friction clutch Constant torque friction clutch

1977-12-08

1980-02-19

Herrmann, Allan D.

192 clutches and power-stop control

Clutches

Operators

64 30R, F16D 702, F16D 2710

Patent

active

041890426

ABSTRACT:
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 engagement pressure of the armature with the inner body set by the maximum torque at that level.

REFERENCES:
patent: 1632539 (1927-06-01), Chilton
patent: 1739947 (1929-12-01), Chilton
patent: 2587712 (1952-03-01), Dodge
patent: 3122903 (1964-03-01), Ramsden
patent: 3511349 (1970-05-01), Herscovici
patent: 3902334 (1975-09-01), Ryan

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