Electrically operated disc brake with back-off protector

Details Electrically operated disc brake with back-off protector Electrically operated disc brake with back-off protector

F - Mech Eng,Light,Heat,Weapons

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F16D 65/16 (2006.01) B60T 13/74 (2006.01) F16D 55/224 (2006.01) F16D 63/00 (2006.01) F16D 65/14 (2006.01) F16D 65/18 (2006.01) F16D 65/21 (2006.01) F16D 55/00 (2006.01) F16D 66/00 (2006.01)

Patent

CA 1319894

ELECTRICALLY OPERATED DISC BRAKE WITH BACK-OFF PROTECTOR ABSTRACT OF THE DISCLOSURE 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 rota- table 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 ser- vice 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.

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