| 摘要 |
PURPOSE: To sharply reduce eccentric abrasion and seizure on a helical gear. CONSTITUTION: This device consists of a diff case 21 which is rotating-driven by an engine, output side helical side gears 37, 39, a helical pinion gear 67 whose gear part 71 is engaged with the gear 39, and a helical pinion gear 69 whose gear part 77 is engaged with the gear 37, and it is provided with a pinion gear group whose gear parts 73, 79 of the gears 67, 69 are engaged with each other, and housing holes 63, 65 for slidably and rotatably housing the gears 67, 69. In the case where the twist angle of tooth trace which is brought in contact with the housing hole 65 at the time of running of a vehicle in the pinion gear 69 is reduced by reaction applied in respective gear parts 77, 79, the tooth length of the center part of the pinion gear 69 is formed smaller than that of both end parts. |
