Electric motor clutch/brake assembly

摘要

A clutch/brake assembly is provided which includes a coil plate non-rotatably captured between the upper housing and the lower housing and having affixed thereon a ring shaped coil, a clutch rotor rotatably secured to the shaft and having a groove configured to accommodate therein the ring shaped coil, and a clutch output assembly having a clutch/brake disc and a clutch output shaft. The clutch/brake disc and the clutch output shaft are attached to one another by a plurality of springs. The clutch/brake assembly may be mounted on a deck of a lawnmower to drive a blade.

主权项

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; anda 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.