| 摘要 |
PURPOSE:To perform the early disengagement of a pinion and to prevent the over rotation of a motor, by providing an attraction holding board and an electromagnet on a unilateral clutch of an inertia starter then connecting in parallel with a DC motor and releasing the attracting force when the motor will be under noload after the starting. CONSTITUTION:Upon closing of a start switch 52, a unilateral clutch 25 will move axially together with a pinion 29 to contact against a stopper ring 40. During this period an engine will start to move the holding board 31 which is attracted to a magnetic circuit 43 and the unilateral clutch 25 is held together with the pinion 29 at the position geared with a ring gear 30. Upon starting of the engine, the load on a DC motor 21 will decrease abruptly thus to reduce the current. Consequently the current flowing through a coil 44 will also decrease to decrease the attracting force of an electromagnet 32. Since the holding board 31 is disengaged from the magnetic circuit 43 by the spring force of a pinion returning spring 34, the clutch 25 is returned to the original position to disengage the pinion 29 from the ring gear 30 and the motor 21 will continue the rotation under the noload state and will be stopped by the turning-off of the switch 52. |
