| 发明名称 | Wheel drive unit | ||
| 摘要 | A wheel drive unit includes: a planetary gear mechanism including a planetary gear and an internally-toothed gear; a casing integrated with the internally-toothed gear, a wheel being attached to the casing, and the casing transmitting rotation of the internally-toothed gear to the wheel; a bearing nut configured to prevent axial movement of the casing; and an oil seal provided more toward an interior of a vehicle than the planetary gear mechanism and axially fixed with respect the casing. An inner diameter of the detachment prevention member is smaller than an outer diameter of the externally-toothed gear. | ||
| 申请公布号 | US8961361(B2) | 申请公布日期 | 2015.02.24 |
| 申请号 | US201314078136 | 申请日期 | 2013.11.12 |
| 申请人 | Sumitomo Heavy Industries, Ltd. | 发明人 | Ishizuka Masayuki |
| 分类号 | F16H57/08;B60K17/04 | 主分类号 | F16H57/08 |
| 代理机构 | Buchanan Ingersoll & Rooney PC | 代理人 | Buchanan Ingersoll & Rooney PC |
| 主权项 | 1. A wheel drive unit for a vehicle, the wheel drive unit comprising: a planetary gear mechanism including a planetary gear and an internally-toothed gear; a casing integrated with the internally-toothed gear, a wheel being attached to the casing, and the casing transmitting rotation of the internally-toothed gear to the wheel; a movement restriction member configured to restrict axial movement of the casing; and a detachment prevention member provided more toward an interior of the vehicle than the planetary gear mechanism and fitted to an inner circumference of the casing to be axially fixed with respect the casing, wherein an inner diameter of the detachment prevention member is smaller than an outer diameter of the planetary gear, and an inner diameter of the casing is larger than the outer diameter of the planetary gear in a region of the casing that is more toward the interior of the vehicle than the planetary gear. | ||
| 地址 | Shinagawa-Ku, Tokyo JP | ||