| 摘要 |
PROBLEM TO BE SOLVED: To provide a driving force transmission device in which the assembly of a rotary shaft and a rotary member is easy and the rotational centers of the rotary shaft and the rotary member after assembled can be easily obtained, and also by which driving force can be transmitted to the other driving force transmission means without rotational irregularity. SOLUTION: A fit-on projected part 54 of the end part of a rotary shaft 50 is inserted or pressure-fitted in the fitting-around recess part 64 of a rotary member 60. The rotary shaft 50 holds the rotary member 60 by both fitting margin 51 and column part 53 which are formed at both ends of the D cut surface 52 of the fitting-in projected part 54, hereby the rotary shaft 50 and the rotary member 60 can obtain the always same rotational center. Also, the D cut surface 52 and a D cut wall surface 62 forms a loose engagement having clearance fit tolerance. Hereby, the assembly of the rotary shaft 50 and the rotary member 60 can be facilitated. |
