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发明公开
CN101043162A 电动机 有权

电动机
摘要：
一种电动机，包括：具有固定有永久磁铁(7)的旋转轴(3)的转子(4)；形成有插入转子(4)用的转子插入孔(8)的定子(2)；设在定子(2)的一端、形成有与转子插入孔(8)同轴的轴承孔(11)的轴承架(12)；设在轴承孔(11)内并可旋转地支承旋转轴(3)一端的轴承(23)；设在轴承架(12)上并与轴承(23)的旋转轴支承面(23a)相反的加压面(23b)抵接而向旋转轴(3)侧对轴承(23)施力的施力构件(24)，在加压面(23b)的中央形成有当对轴承(23)进行树脂成形时使用的成形材料浇口痕迹(23c)。采用本发明，可确保轴承的成形容易性并可确保圆度的精密性，而且，可确保对于轴承的施力宽度较大，实现稳定的轴承支承。
摘要（英）：

A motor may include a bearing made of resin for rotatably supporting one end part of the rotor shaft, and an urging member attached to a bearing holder and abutted with a pressurization face of the bearing to urge the bearing toward a side of the rotor shaft. A molding material injection gate trace (projection) which has been used when the bearing is resin-molded is positioned at a center portion of the pressurization face. The molding material injection gate trace may be positioned in a recessed part which is formed at a roughly center portion of the pressurization face of the bearing. Further, the urging member may include an urging piece which is formed by cutting a center portion of a metal plate in a ring shape and an opening part is formed in the urging piece.

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