- 公益社団法人 日本設計工学会
- 設計工学 (ISSN:09192948)
- pp.2015.2674, (Released:2016-03-25)
Roller chains are applied in two wheels, constructing machine and agricultural machine as the power-transmitting means. Compared with a belt as a winding transmission device, chain transmission is of advantage in transmission efficiency and capability. However, there is a problem of elongation caused by wear between pin and bush, which make flexion movement. Generally to decrease the wear, although a certain additive agent such as wear inhibitor is mixed with lubricant, the advantageous effect does not exist for very long time. Because the side surfaces of pin and bush are opened up to the air. Our past result presents that the contact between pin and bush occurs only at the both ends of the pin. On the basis of this resultant, the authors dealt with the possibility of decrease of wear by reducing contact surface pressure with enlarging the contact area between pin and bush. Then, crowning process to reduce edge load in cylindrical roller bearing was experimented. Furthermore, an optimized design, to enlarge the contact area by means of FEM analysis with considering the deformation of bush due to the press fitting, was also studied. Consequently, in this research, the decrease of wear depth by enlarging the contact area was verified by some experiments.