Electric motor
First Claim
Patent Images
1. A miniature electric motor having:
- a stator;
a rotor having a shaft;
a sleeve bearing supporting the rotor and having an axial face facing the rotor; and
an abutment on the shaft having a thrust face opposing the end face of the bearing;
wherein the thrust face is profiled with an axial separation between a radially inner location adjacent the shaft and a radially outer location adjacent the periphery of the abutment with the inner location projecting towards the bearing.
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Accused Products
Abstract
In an electric motor, a shaft 12 is supported by a sleeve bearing 10 and axial movement of the shaft 12 through the bearing 10 is restricted by an abutment 20 supported by or as a part of spacer 14. The abutment 20 has a thrust face 22 which bears against an end face 16 of the bearing 10 creating a thrust/bearing interface. The thrust face 22 has a part spherical profile to accommodate variations in the alignment between the bearing 10 and the shaft 12 due to manufacturing tolerances, etc.
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Citations
11 Claims
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1. A miniature electric motor having:
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a stator;
a rotor having a shaft;
a sleeve bearing supporting the rotor and having an axial face facing the rotor; and
an abutment on the shaft having a thrust face opposing the end face of the bearing;
wherein the thrust face is profiled with an axial separation between a radially inner location adjacent the shaft and a radially outer location adjacent the periphery of the abutment with the inner location projecting towards the bearing. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification