抄録
The present paper describes characteristics of asymmetric gears. A large pressure angle gear enables a load-capability to increase without changing its size and the material. However, the larger pressure angle is, the narrower top land is. Therefore, the asymmetric tooth profile gears were noticed. Contact stress, transverse contact ratio, sliding ratio and bearing load were calculated with changing pressure angle. As a result, contact stress and sliding ratio of asymmetric gears were decreased with increasing pressure angle, and these were less than symmetric gears. However, contact ratio was also decreased and bearing load was increased compared with symmetric gears. Moreover, bending stress, contact stress, friction coefficient, flash temperature, oil film thickness, damage probability and efficiency were calculated. It was found that asymmetric gears have advantages compared with symmetric gear.
