| 摘要 |
PROBLEM TO BE SOLVED: To keep a coaxial gear tooth with high precision and transmit a rotational motion at a smooth constant speed. SOLUTION: A helical gear is used for a drive shaft, a driven shaft coupled to an object to be driven, and a transmission mechanism to transmit a drive force to the driven shaft, and an elastic supporting means is provided to elastically support the position in a thrust direction of the driven gear tooth to a drive gear tooth. In constitution so that supporting is effected in a way that a protrusion part 802 is formed as the elastic supporting means on a boss 801 of the driven gear 800, even when rotational vibration at the gear tooth part occurs due to an error in a gear shape, thrust rigidity is provided by elastic deformation of the protrusion part 802, and even when rotational vibration of the gear tooth part occurs due to an error in a gear shape, the vibration is not transmitted as a rotation direction to the driven shaft. In this case, vibration in a translatory vibration is absorbed by elastic deformation of the protrusion part 802, and constant speed rotation is carried out. COPYRIGHT: (C)2004,JPO
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