| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a differential gear device for a vehicle capable of enhancing the lubricity of sliding surface of a pinion shaft and a differential pinion gear even in lubricating oil of which viscosity is made low. <P>SOLUTION: The differential pinion gear device includes a plurality of infinitesimal holes 42a wherein the closer they approach a differential pinion gear 20, the more they decline to a pinion shaft 18. The device is also configured so that oil supply is continued as much as possible even in the lubricating oil of which viscosity is made low to enhance the lubricity because the oil supply is maintained until the lubricating oil stored in the infinitesimal holes 42a is run out even if an amount of oil supply in a differential case 14 becomes shortage by providing the axis C1 side of the differential gear 20 with a circular annulus porous member 38 which introduces the lubricating oil stored in the infinitesimal holes 42a along the infinitesimal holes 42a by a centrifugal force and supplies it to the sliding surface. In addition, the lubricity is further enhanced effectively for efficient supply to the sliding surface because the lubricating oil stored in the infinitesimal holes 42a is introduced along the infinitesimal holes 42a. <P>COPYRIGHT: (C)2010,JPO&INPIT |
