| 摘要 |
An electric motor and brake comprises a stator, a rotor, a rotatable brake member and a fixed brake member, the rotor carrying a magnetic actuator at one of its ends. A coupling mechanism couples the rotatable brake member to the motor to rotate with the rotor but to be axially displaceable with respect thereto, and the rotatable brake member is made at least in part of magnetic material, so that it is attracted axially toward the magnetic actuator and away from the fixed brake member by the magnetic field produced by current flowing through the rotor. A spring is provided for urging the rotatable brake member away from the actuator and into engagement with the fixed brake member. The magnetic actuator is U-shaped and opened at one side, and the stator is in line at both its ends with the rotor.
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