Patent ID: 7656063
Filing Date: 2010-02-02
Classification: B60T,H02K

Abstract:
1. A motor for use with a pump, wherein the motor includes an output shaft, and the pump includes a pump plunger reciprocated in a radial direction of the output shaft by rotation of the output shaft, the motor comprising: a core fixed to the output shaft so as to be integrally rotatable with the output shaft, the core including an annular portion and a plurality of teeth extending radially outward from the annular portion; a plurality of windings wound around the plurality of teeth; a commutator fixed to the output shaft so as to be integrally rotatable with the output shaft, the commutator being formed to be generally cylindrical, and the commutator having a circumferential surface having an electrical contact point; a first bearing and a second bearing for rotatably supporting the output shaft, the core and the commutator being arranged between the first bearing and the second bearing in an axial direction of the output shaft, the second bearing overlapping the windings in the axial direction of the output shaft; a magnetic field body having six magnetic poles; and a case for accommodating the output shaft, the case including a through hole for insertion of the first bearing, the through hole having a dimension that is smaller than that of the first bearing in the axial direction of the output shaft, and part of the first bearing being exposed to the outside of the case.