| 摘要 |
PROBLEM TO BE SOLVED: To satisfy strength for suppressing shaft core deviation due to deformation of an annular bearing support boss for rotatably supporting a shaft member, while responding to a request for weight reduction of a case.SOLUTION: In a transmission case TC constituted by flange connection of a main transmission case 1, a converter housing 2, and a side cover 3 mutually which are split, the side cover 3 has a composite structure with a metal frame 5 and a resin cover 6. The metal frame 5 has, as reinforcement ribs, a first rib 54, a second rib 55, a third rib 57, and a fourth rib 56. The first rib 54 connects a first mount boss 54a, and a first bearing support boss 52. The second rib 55 connects a second mount boss 55a and a second bearing support boss 53, and is coupled to an outer circumference flange 51. The third rib 57 connects a first bearing support boss 52 and the outer circumference flange 51. The fourth rib 56 connects the third rib 57 and the second rib 55 which do no intersect each other at set positions of the both bearing support bosses 52, 53. |
