1. The first scheme has low contact strength and high bending strength. (Compared with Scheme II)

2. Option 2 is better. Can meet the bending strength, high contact strength and high gear coincidence coefficient. (Compared with Scheme I)

The gear coincidence coefficient of the first scheme is 1.67, and the pinion slip rate is 4.47; The gear coincidence coefficient of the second scheme is 1.79, and the pinion slip rate is 0.9.