Planetary gear transmission systems or components – Electric or magnetic drive or control – Differential drive or control
Patent
1991-06-05
1992-10-20
Bonck, Rodney H.
Planetary gear transmission systems or components
Electric or magnetic drive or control
Differential drive or control
475249, 475252, 475 84, F16H 144
Patent
active
051565781
ABSTRACT:
A differential gear device for a vehicle is disclosed. The differential gear device is provided with a planetary gearing for producing differential motion having a ring gear with an tooth portion, and a electro-magnetic multiple clutch for limiting the differential motion. The electromagnetic clutch is provided with a plurality of outer friction plates and a plurality of inner friction plates alternately positioned with the outer friction plates. An outer rotary member made of a nonmagnetic substance and integrally joined to the ring gear is provided for the electro-magnetic multiple clutch. The outer rotary member is provided with a tooth portion for engaging the outer friction plates. The tooth portion of the outer rotary member is formed to receive the outer friction plates from the tooth portion side of the ring gear and has an aperture at least larger than the thickness of one outer friction plate at the tooth portion of the ring gear. The electromagnetic clutch is provided with an inner rotary member with tooth portion for engaging the inner friction plates and a electromagnet for causing frictional engagement of the outer and inner friction plates.
REFERENCES:
patent: 4733577 (1988-03-01), Griesser et al.
patent: 4781078 (1988-11-01), Blessing et al.
patent: 4860612 (1989-08-01), Dick et al.
patent: 4895236 (1990-01-01), Sakakibara et al.
patent: 4989686 (1991-02-01), Miller et al.
patent: 5006098 (1991-04-01), Yoshinaka et al.
patent: 5019021 (1991-05-01), Janson
patent: 5030181 (1991-07-01), Keller
Japanese laid Open Publication No. 63-195449 (corresponding to U.S. Pat. No. 4,781,078).
Bonck Rodney H.
Tochigifujisangyo Kabushiki Kaisha
Wittels Daniel
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