Metal working – Method of mechanical manufacture – Electrical device making
Patent
1980-08-28
1981-10-20
Hall, Carl E.
Metal working
Method of mechanical manufacture
Electrical device making
310 42, 310 90, H02K 1502
Patent
active
042952689
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: 3302048 (1967-01-01), Gray
patent: 3319098 (1967-05-01), Hartman
patent: 4170057 (1979-10-01), Roddy et al.
Peachee C. Theodore
Punshon William D.
Emerson Electric Co.
Hall Carl E.
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