| 摘要 |
PROBLEM TO BE SOLVED: To provide an internal combustion engine transmission capable of eliminating a support wall around a reduction gear and reducing a length of a main shaft while receiving a thrust load.SOLUTION: A primary bearing 5 fixedly attached to an inside of a primary driven gear 8 and disposed between the primary driven gear 8 and a main shaft 10 of a transmission 1 of an internal combustion engine and a collar member 4 disposed between the primary bearing 5 and a main bearing 3 are provided around the main shaft 10. A stepped portion 2 in contact with the main bearing 3 is formed in the main shaft 10 on an opposite side to the collar member 4 across the main bearing 3. A cylindrical portion 22C, an inner race 5i of the primary bearing 5, the collar member 4, and an inner race 3i of the main bearing 3 are fastened to the stepped portion 2 by a fastening member 7. |
