Brake mechanism and powered actuator

Details Brake mechanism and powered actuator Brake mechanism and powered actuator

H - Electricity

02

K

H02K 7/106 (2006.01) F16K 31/04 (2006.01) G05D 7/06 (2006.01) H02P 3/04 (2006.01)

Patent

CA 2221902

A brake mechanism includes a reduction gear train, a motor structure, and a braking means. The reduction gear train transmits at least a rotation force in a first rotational direction supplied from a drive source. The reduction gear train is imparted with a returning tendency in a second rotational direction opposite to the first rotational direction. The motor structure has an output shaft rotatably connected to the reduction gear train. The braking means has field magnets, an armature coil, a braking circuit, and either one of a fixed resistor, a variable resistor, a rectifying diode, a Zener diode, a varister, a constant-current diode, a light-emitting diode, and a lamp bulb. The braking means generates a torque in the first rotational direction to the output shaft which, upon being disconnected from the drive source, rotates to return in the second rotational direction through the reduction gear train in accordance with the returning tendency, thereby suppressing a returning rotation speed of the reduction gear train. A powered actuator is also disclosed.

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