| 摘要 |
The invention relates to a one-axis starter apparatus which can eliminate the use of a one-way rotation clutch and simplify the machining of the motor shaft, wherein while the first male helical spline is provided at the tip end of the motor shaft, the inner member is externally provided at the tip end portion of the corresponding motor shaft via the first female helical spline. The second male helical spline is provided in the screwing direction opposite to the first male and female helical splines, respectively, on the outer circumferential surface of the inner member, whereas the outer member, having a pinion gear formed thereon via the second female helical spline, is externally fitted to the corresponding inner member, and a pressing mechanism which presses the outer member toward the tip end o the starter apparatus intervenes between the corresponding outer member and the inner member.
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