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    • 5. 发明授权
    • Method for constructing a liquid-impervious electric motor assembly
    • 用于构造液体不可渗透电动机组件的方法
    • US5853643A
    • 1998-12-29
    • US690233
    • 1996-07-19
    • Scott V. Bauer
    • Scott V. Bauer
    • B29C45/14B29C70/72F04B23/02F04D13/08H02K5/132H02K15/12B29C45/36
    • H02K5/132B29C45/14639B29C70/72F04B23/021F04D13/086H02K15/12B29L2031/3061
    • A method for encapsulating an electric motor in resinous material by an injection molding process comprises providing a motor assembly having an armature and associated drive shaft supported at one end by a bearing bracket. The motor is inserted into a cavity of a multi-piece mold in which one part of the mold has a bore for slidingly receiving the motor shaft with the bearing bracket in close abutment with the mold. The motor is thus supported centrally of the mold cavity. Liquid resinous material is injected into the mold preferably from a side of the motor opposite the motor shaft such that the liquid material forces the motor bearing bracket against the apertured part of the mold. The resinous material is thereby prevented from entering into the bearing bracket into contact with the motor shaft. In order to positively locate the motor in a predetermined orientation within the mold cavity, the bearing bracket may be provided with a small recess into which a cooperating projection of the mold is received.
    • 通过注射成型工艺将电动马达封装在树脂材料中的方法包括提供具有电枢和相关联的驱动轴的马达组件,所述马达组件的一端由轴承托架支撑。 电动机被插入到多片模具的空腔中,其中一部分模具具有用于滑动地接收电动机轴的孔,轴承支架与模具紧密邻接。 因此,电动机被支撑在模腔的中心。 优选地,液体树脂材料从电动机的与电动机轴相对的侧面注入到模具中,使得液体材料迫使电动机轴承支架抵靠模具的有孔部分。 由此防止了树脂材料进入轴承座与电动机轴接触。 为了在模具腔内以预定方向正确定位电机,轴承托架可以设置有小凹部,模具的配合突起被容纳在该凹槽中。