PROBLEM TO BE SOLVED: To secure necessary and sufficient durability and rigidity even if a spline length between an end part of an output shaft 28 and an annular plate 33a of a pin holder 33 cannot be secured sufficiently when separating the output shaft 28 of a reduction gear 20 and the annular plate 33 of the pin holder 33, and connecting the end part of the output shaft 28 and the annular plate 33a of the pin holder 33 by spline fitment.SOLUTION: An output shaft 28 arranged at an annular plate 33a at an outer side of a pin holder 33 is separated from the annular plate 33a, and formed as a different body, a spline which is spline-fit to an internal peripheral face of a hub ring 51 is formed at the hub ring 51 side of the output shaft 28, a spline which is spline-fit to the annular plate 33a of the pin holder 33 is formed at an end part of the output shaft 28 at a reduction gear side, and the spline at the reduction gear 20 side of the output shaft 28 is made larger in diameter than the spline at the hub ring 51 side of the output shaft 28. The surface pressure of a spline fitting portion is thereby lowered by increasing the number of teeth of the splines, and necessary and sufficient durability and rigidity can be secured.SELECTED DRAWING: Figure 4
【課題】 減速機20の出力軸28をピンホルダ33の環状板33aと切り離し、出力軸28の端部とピンホルダ33の環状板33aとをスプライン嵌合によって接続する場合に、出力軸28の端部とピンホルダ33の環状板33aとの間のスプライン長さを十分に確保できなくても、必要十分な耐久性および強度を確保する。【解決手段】 ピンホルダ33のアウタ側の環状板33aに設けた出力軸28を、環状板33aと切り離して別体に形成し、この出力軸28のハブ輪51側にハブ輪51の内周面にスプライン嵌合するスプラインを形成し、出力軸28の減速機側の端部に、ピンホルダ33の環状板33aにスプライン嵌合するスプラインを形成し、出力軸28のハブ輪51側のスプラインよりも、出力軸28の減速機20側のスプラインを大径にすることによって、スプラインの歯数を多くしてスプライン嵌合部分の面圧を下げて、必要十分な耐久性と強度の確保を可能にした。【選択図】 図4
WHEEL DRIVE UNIT
車輪駆動装置
2016-02-01
Patent
Elektronische Ressource
Japanisch