| 摘要 |
PROBLEM TO BE SOLVED: To provide a planetary gear mechanism capable of enhancing the driving force transmitting efficiency and the durability by making uniform the load bearing amounts of different pinions without causing a drop of the driving force which the mechanism is able to transmit.SOLUTION: The planetary gear mechanism P has a pinion shaft 15 supported by a pinion shaft supporting hole 20a of a carrier 14, and a deformable slit 20c is formed in at least one part of the surrounding area of the hole 20a, whereby the meshing reaction forces applied to pinion gear 16 from the sun gear 12 and ring gear 13 can be made uniform to result in enhancement of the power transmitting efficiency by deforming the slit 20c and changing the position of the pinion shaft 15 when the resultant of the meshing reaction forces applied to the pinion gear 16 from the sun gear 12 and ring gear 13 acts on the carrier 14 through the pinion shaft 15, and also eccentric application of the load on part of the pinion gear 16 can be suppressed, which should lead to enhancement of the durability. Further the rigidity of the carrier 14 as a whole is kept high, and this is free of such a risk that the driving force which the mechanism P is able to transmit decreases. |
