| 摘要 |
A brush holder assembly for use in an electric actuating device includes a cylindrical sleeve mounted in a housing of the device. The sleeve incorporates a tube that has an end extending inwardly toward a commutator. The tube may also have a length longer than the cylindrical sleeve, such that the end extends beyond the opening. A U-shaped shunt, having a uniform thickness, is slidably positioned within the tube. The U-shaped shunt has flanges extending outwardly from legs that extend towards the commutator. A brush is positioned between the legs of the shunt with a constant force spring being positioned between the brush and the inner surface of the U-shaped shunt. The spring has a pair of coiled ends that are positioned against the flanges. The spring also includes a middle portion that engages one end of the brush to resiliently push the brush against the commutator with a constant applied force. The U-shaped shunt is connected to the brush by a pig tail wire. In addition, the tube has two pairs of longitudinally diametric extending slots, one pair for receiving and positioning the shunt and the other pair for receiving and positioning the brush. Lastly, a removable cap is positioned in the sleeve for retaining the shunt, spring and brush within the sleeve during operation. In addition, a longitudinal slot is positioned between the tube and the sleeve for receiving a terminal connector, onto which a lead wire is crimped, which is connected to an external electrical source.
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