Brakes – Wheel – Axially movable brake element or housing therefor
Patent
1988-04-19
1989-02-14
Kashnikow, Andres
Brakes
Wheel
Axially movable brake element or housing therefor
74805, 188 728, F16D 5516
Patent
active
048040738
ABSTRACT:
The electrically operated disc brake (10, 110, 310, 410) may be operated by either hydraulic pressure and an electric motor or operated solely by means of an electric motor. The electric motor (40, 340, 440) drives a sun gear (52, 352, 452) of a planetary gear assembly (50, 150, 350, 450). The planetary gear assembly (50, 150, 350, 450) includes a fixed ring gear (70, 370, 470) and a rotatable ring gear (80, 180, 380, 480), the rotatable ring gear (80, 180, 380, 480) having fewer teeth than the fixed ring gear (70, 370, 470) so that rotation of the planetary gears (54, 56, 58) effects a slower rate of rotation of the rotatable ring gear (80, 180, 380, 480). The rotatable ring gear (80, 180, 380, 480) engages a screw (88, 188, 388, 488) which is connected with the piston (30, 130, 330, 430). The piston (30, 330, 430) may be displaced by hydraulic fluid for a service application and the electric motor (40, 340, 440) utilized for a parking application. Alternatively, the piston (130) may be displaced by the electric motor (40) for both service and parking brake applications.
REFERENCES:
patent: 3842949 (1974-10-01), Newstead
patent: 4022300 (1977-05-01), Afanador et al.
patent: 4503719 (1985-03-01), Hamano
patent: 4603594 (1986-08-01), Grimm
patent: 4658939 (1987-04-01), Kircher et al.
DeHays Richard N.
Jackson Robert W.
Taig Alistair G.
Allied-Signal Inc.
Decker Ken C.
Kashnikow Andres
Le Mark T.
Palguta Larry J.
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