| 摘要 |
A starter motor including an electric motor driving a shaft. The shaft carries a pinion assembly, the pinion assembly being rotatable with the shaft and being movable axially along the shaft between a rest position and an operative position. An electromagnetic arrangment is provided for moving the pinion assembly from its rest position to its operative position and in the drive connection between the electromagnet arrangement and the pinion assembly there is a member which bears against one end of the pinion assembly, and which in the rest position of the pinion assembly is trapped between the pinion assembly and a collar carried by the shaft. The electromagnet of the electromagnet arrangement, when energised, moves the armature in such a manner that the pinion assembly is urged by way of said member towards its operative position. The shaft and the pinion assembly rotate relative to the armature and said member when the electric motor is energised, but the armature and said member act as a brake to rotation of the pinion assembly and the shaft when the pinion assembly returns to its rest position where the member is trapped between the pinion assembly and the collar carried by the shaft. |
