192 clutches and power-stop control – Clutches – Operators
Patent
1996-11-05
1999-01-26
Bonck, Rodney H.
192 clutches and power-stop control
Clutches
Operators
1921135, F16D 27112
Patent
active
058629025
ABSTRACT:
An electromagnetic friction clutch assembly includes an input gear which is supported directly on an output shaft for rotation relative thereto. The input gear is formed from a self-lubricating molded thermoplastic material, or a self-lubricating metallic material. An armature is rotatably supported on a tubular extension formed on the input gear. The armature is connected to the input gear for rotation therewith and for relative axial movement. A rotor plate is secured to the output shaft for rotation therewith. The armature is axially movable between an engaged position, wherein it frictionally engages the rotor disc, so as to cause the output shaft to be rotatably driven by the input gear, and a disengaged position, wherein it does not frictionally engage the rotor disc. A non-rotatable electromagnet is supported on the output shaft for selectively attracting the armature toward the rotor disc so as to engage the electromagnetic friction clutch assembly. The electromagnet includes an annular shell including an inner pole piece, which is hollow and cylindrical in shape, and an outer pole piece, which has a generally L-shaped cross section. The inner pole piece is disposed about the central portion of the output shaft, and the outer pole piece is press fit or otherwise secured to the inner pole piece. The inner pole piece is preferably formed from a self-lubricating magnetically permeable material. The inner pole piece can be formed from powdered metal which is sintered to form a relatively porous body. The porous body of the inner pole piece can then be impregnated with a suitable lubricant, such as an oil or a self-lubricating plastic.
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Dana Drawing No. A-904-007 dated Mar. 27, 1985.
Bonck Rodney H.
Dana Corporation
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