Armature shaft support structure for use in an electric motor

Details Armature shaft support structure for use in an electric motor Armature shaft support structure for use in an electric motor

1997-08-01

1999-11-02

Ramirez, Nestor

Electrical generator or motor structure

Dynamoelectric

Rotary

310 42, 29596, H02K 1500

Patent

active

059776730

ABSTRACT:
An electric motor is constructed by tightening set bolts to secure a yoke opened at one end to a bracket mounted on the yoke open end. The outer ring of bearings is press-fitted into the yoke, the inner ring of the bearings is press-fitted around an armature shaft, and the bearings are free from an undue excessive axial load during the tightening the set bolts, without the need for fixing the outer ring to the yoke. A gap between the inner ring of the bearings and a step portion of the armature shaft for restricting the displacement of the inner ring toward the yoke open end, or a gap between the outer ring of the bearings and the closed end of a bearing housing for restricting the displacement of the outer ring in the direction opposite the direction toward the yoke open end, or the sum of both gaps, prior to tightening the set bolts, is set to be greater than the axial deformation of the yoke resulting from the tightening of the set bolts.

REFERENCES:
patent: 4899432 (1990-02-01), Adam et al.
patent: 5223756 (1993-06-01), Bello
patent: 5272803 (1993-12-01), Harrison et al.

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