| 摘要 |
PURPOSE:To aim at enhancing the life of an epicyclic gear transmission device by arranging a bearing for a sun pinion shaft having one end secured to a transmission disc and the other end provided with a sun pinion, at the center axis of an inner gear so as to correct dynamic unbalance of a rotary mechanism section. CONSTITUTION:In a multi-stage epicyclic reduction gear, when a sun pinion E is rotated, a planetary pinion B internally meshed with an inner gear A secured to a housing 8 performs planetary revolution. In this phase, a transmission disc P clamping the rear end of a sun pinion shaft D which pierces through a bearing S fitted on the center axis of the inner gear A and a planetary shaft C journalling the planetary pinion B revolves, and the sun pinion E is meshed with the planetary pinion B with a predetermined center axis space distance being maintained therebetween while the planetary pinion B is meshed with the inner gear A with a predetermined center axis space being maintained therebetween so that dynamic unbalance of a rotary mechanism may be corrected to prevent the center axis from oscillating. Thus, it is possible to prevent vibration and noise and to prolong the life of the epicyclic transmission.
|
