Yoke arrangement for an electric motor having an improved mechan

Details Yoke arrangement for an electric motor having an improved mechan Yoke arrangement for an electric motor having an improved mechan

1997-07-02

1999-01-26

Dougherty, Thomas M.

Electrical generator or motor structure

Dynamoelectric

Rotary

310 43, 310 91, 180140, 180148, H02K 500, H02K 524, B62D 504

Patent

active

058641890

ABSTRACT:
In a yoke arrangement for electric motors which are particularly suitable for use in electric power steering devices, the yoke comprises a first tubular portion, a second tubular portion which has a smaller diameter than the first tubular portion, and a tapered section connecting the two tubular portions. The length of the tapered sections is desired to be minimized so that the overall length of the electric motor may be minimized. Reducing the length of the tapered section and thereby increasing the taper angle of the tapered section leads to the reduction in the mechanical strength of the yoke against an axial force. To compensate for this reduction in mechanical strength, the wall thickness of the tapered section is made larger than that of the first portion. Thus, the overall mechanical strength of the yoke can be ensured with a minimum increase in the material cost and manufacturing cost. The yoke may be formed by plastic deformation such as swaging and expansion.

REFERENCES:
patent: 4666010 (1987-05-01), Morishita et al.
patent: 4724917 (1988-02-01), Naito et al.
patent: 4828062 (1989-05-01), Shimizu
patent: 5355968 (1994-10-01), Smith

Affiliated with

Also associated with

Rating

Yoke arrangement for an electric motor having an improved mechan does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Yoke arrangement for an electric motor having an improved mechan, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Yoke arrangement for an electric motor having an improved mechan will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1452610