| 摘要 |
A final reduction gear device 11 including an orthogonal axis gear 12 and a speed reduction mechanism portion 13 employing a planetary gear 133 is provided. A radial bearing 20, more specifically a cylindrical roller bearing, having a large radial load capacity is disposed between a bevel ring gear 122 of the orthogonal axis gear 12 and a differential case 141. A thrust bearing 21, more specifically a thrust ball bearing or a thrust roller bearing, having a large axial load capacity is disposed between an axial end portion of a sun gear 131, and an inner race side of the radial bearing and the side of a fitting portion 141a of the differential case, to which the inner race is fitted. A thrust bearing 23, more specifically a thrust ball bearing or a thrust roller bearing, having a large axial load capacity is disposed between the bevel ring gear 122 and a planetary carrier 134 of the speed reduction mechanism portion 13. |
