| 摘要 |
PROBLEM TO BE SOLVED: To reduce the rattling noise without reducing the amount of backlash in an engagement part. SOLUTION: The speed reduction gear mechanism comprises mutually meshing smaller gear 2 and larger gear 4 with their shafts 1 and 2 arranged parallel to each other, a first rotor 7 which rotates together with the smaller gear 2, and a second rotor 8 which rotates together with the larger gear 4 to generate sliding friction between the first rotor 7 and itself in the reverse rotation direction of one of the smaller gear 2 and the larger gear 4. When a relative speed is generated between the smaller gear 2 and the larger gear 4 by rotation of one of the smaller gear 2 and the larger gear 4, resistance is applied to the reverse rotation of the one of the gears and the relative speed is reduced to reduce the rattling noise which is made when the surfaces of their teeth come into contact with each other. COPYRIGHT: (C)2008,JPO&INPIT |
