Gears are very important accessories for the entire gearbox. During equipment operation, gears and gears are actually in an interlocked state. Therefore, in order to effectively use the equipment, it is necessary to design each accessory reasonably. Especially the gears. However, the following principles should also be followed during design:

1. Closed transmission: The soft tooth surface should be designed and calculated based on the contact fatigue strength of the tooth surface to determine the parameters and dimensions of the gear, and then check whether the bending fatigue strength of the tooth root meets the requirements.

2. The hard tooth surface of the reducer should be designed and calculated based on the bending fatigue bending strength to determine the parameters and dimensions of the gear, and then the contact fatigue strength of the tooth surface should be checked. In open transmission, only the bending fatigue strength of the tooth root is calculated, and the modulus is appropriately increased while retaining the wear amount to meet the contact fatigue strength of the tooth surface.

Usually, the gear reducer should first calculate the pitch circle diameter and main geometric parameters of the gear based on the contact fatigue strength conditions of the tooth surface, and then check the bending fatigue strength of its gear teeth. When using hard tooth surfaces, the gear module and its main geometric parameters should usually be determined based on the bending fatigue strength conditions of the gear, and then the contact fatigue strength of the tooth surface should be checked.

It can be imagined the importance of gears to reducers. It can be seen that the above principles should also be followed when designing gears. The accuracy, size, diameter, and other data of gears are all part of the design process that must be carefully planned to improve equipment efficiency.