Electric motor bearing assembly

Details Electric motor bearing assembly Electric motor bearing assembly

1979-04-06

1981-01-20

Stearns, Richard R.

Cutlery

308 72, 308161, 310 90, F16C 1710, H02K 516

Patent

active

042458706

ABSTRACT:
An electric motor having a stator assembly, a shaft, a rotor mounted on the shaft, and a pair of end shields secured to the stator assembly and journalling the shaft for rotation of the rotor within the stator assembly. The motor includes a pair of self-aligning bearings for transmitting both radial and thrust (i.e., axial) loads from the shaft to the end shields. Each of the end shields has an outwardly facing race. A first ball member is axially fixed with respect to the shaft and is journalled in the race of one of the end shields. A second ball member is axially movable along the shaft and is journalled in the race of its respective end shield. A pushnut or the like is provided to axially secure the second ball member to the shaft when the first and second ball members are journalled in their respective races thereby to substantially prevent axial movement (i.e., end play) of the rotor with respect to the stator assembly and to permit the transfer of axial loads in either direction from the shaft to the end shields. A method of assemblying a motor, such as above described, is also disclosed.

REFERENCES:
patent: 2603674 (1952-07-01), Koch
patent: 2985493 (1961-05-01), Dinsmore
patent: 2998999 (1961-09-01), Morser et al.
patent: 3002794 (1961-10-01), Bluemink
patent: 3013167 (1961-12-01), Bobula
patent: 3319098 (1967-05-01), Hartman
patent: 3391290 (1968-07-01), Hahndorf et al.
patent: 4170057 (1979-10-01), Roddy et al.

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