Center distance is a basic paramete

Center distance is a basic parameter. Its size not only affects the overall size, volume and quality of the transmission, but also affects the contact strength of the gear teeth. The smaller the center distance, the greater the contact stress, and the shorter the life of the gear. Therefore, the minimum allowable center distance should be determined by ensuring the necessary contact strength of the teeth.. The drive shaft is mounted on the housing by bearings.. Considering the possibility and convenience of arranging transmission, the distance between the two bearing holes on the same vertical plane is too small, and the shell strength, the center distance is required to be large. In addition, because the number of teeth of the first gear cannot be too small, the center distance is required to be large. In addition, if the distance between the transmission centers is too small, the transmission length will increase, so the stiffness of the shaft will be weakened and the meshing state of the gears will deteriorate.