Electric motor clutch/brake assembly
First Claim
Patent Images
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.
1 Assignment
0 Petitions
Accused Products
Abstract
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.
-
Citations
16 Claims
-
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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
-
10. An enclosed motor and clutch device comprising:
-
a housing; an electric motor disposed in the housing; a motor shaft disposed in the housing, rotatably driven by the electric motor, and having a first axis; a ring-shaped electromagnetically energizable coil; a clutch rotor disposed in the housing and mounted on and rotatably driven by the motor shaft; and a clutch output shaft assembly comprising; an output shaft rotatably mounted in the housing on the first axis; an annular clutch/brake disc disposed in the housing; 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 corresponding to a braking mode and a second position corresponding to a driving mode, 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 and the plurality of springs is flexed when the coil is energized. - View Dependent Claims (11, 12, 13, 14, 15, 16)
-
Specification