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Electric motor clutch/brake assembly

  • US 9,097,288 B1
  • Filed: 12/30/2013
  • Issued: 08/04/2015
  • Est. Priority Date: 06/21/2010
  • Status: Active Grant
First Claim
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1. A motor and clutch assembly, comprising:

  • an electric motor;

    a motor shaft rotatably driven by the electric motor and having a first axis;

    a motor housing disposed about the electric motor;

    a clutch housing mounted to the motor housing to form an enclosure;

    a coil mounting member disposed in the enclosure;

    a ring-shaped electromagnetically energizable coil non-rotatably disposed on the coil mounting member;

    a clutch rotor disposed in the enclosure and mounted on and rotatably driven by the motor shaft;

    a clutch output shaft assembly comprising;

    an output shaft rotatably mounted in the clutch housing on the first axis;

    an annular clutch/brake disc; and

    a plurality of springs extending radially outward from the output shaft to the clutch/brake disc and connected to the output shaft and the clutch/brake disc;

    wherein the clutch/brake disc moves axially relative to the output shaft between a first position and a second position, wherein in the first position the clutch/brake disc is retained against a brake surface by a bias in the plurality of springs when the coil is not energized, and in the second position, the clutch/brake disc is retained against the clutch rotor when the coil is energized.

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