Patent ID: 8207643
Filing Date: 2012-06-26
Classification: H02K

Abstract:
1. A motor, comprising: a housing including a shaft tube receiving a bearing, wherein the shaft tube has a free end; a rotor including a shaft rotatably extending through the bearing and having an annular groove in a neck shape formed on an outer periphery thereof; and a stator including an assembling hole receiving the outer periphery of the shaft tube, with the stator including an upper bobbin, a lower bobbin, a plurality of silicon steel plates sandwiched between the upper and lower bobbins, and a winding wound around the plurality of silicon steel plates, wherein the upper bobbin includes an abutting member in the form of a plurality of pressing plates, wherein said pressing plates are annularly formed on an inner periphery of the upper bobbin with intervals, with each pressing plate having a first abutting portion and a second abutting portion, with the first abutting portion having a first end connecting to the inner periphery of the upper bobbin and a second end abutting against a top surface of the bearing, with the first abutting portion extending in a straightforward manner from the first end to the second end, with the free end of the shaft tube being lower than the first end but higher than the second end of the first abutting portion in an axial direction, with the first abutting portion being spaced from the shaft tube and abutting only on the bearing, with the second abutting portion extending from the first abutting portion into the annular groove of the shaft to avoid the bearing and the rotor from disengaging from the shaft tube.