| 摘要 |
<p>An engine starter consisting of an electric motor having a tubular armature rotary shaft (2), an output rotary shaft (16) disposed at one axial end portion of the motor so as to extend coaxially with the armature rotary shaft (2) and be supported slidably in the axial direction, a clutch means (21) adapted to transmit the rotational force of the armature rotary shaft (2) to the output rotary shaft (16), and an electromagnetic switch which has movable body (27, 30, 47) provided at the other axial end portion of the motor and adapted to press and slidingly move the output rotary shaft in the axial direction by means of the electromagnetic force, and which is adapted to engage a movable contact (28) with a fixed contact (32) by means of the electromagnetic force and supply an electric current to the motor, the rear portion of the output rotary shaft (16) and the front portion of the movable body (27, 30, 47) being inserted from the opposite directions into the tubular body of the armature rotary shaft (2) so as to arrange the movable body (27, 30, 47) of the electromagnetic switch, armature rotary shaft (2) and output rotary shaft (16) coaxially. Since the overall length of the starter is reduced so as to arrange these parts coaxially, the starter is formed such that the entry of the dust into a contact chamber in the electromagnetic switch can be prevented. In order to form the starter compactly, limitation is placed on the position in which a spring as a means for returning the output rotary shaft to its original position after the engine has been started is disposed.</p> |
