The structural design of the shaft is an important step in determining the shaft's reasonable shape and overall structural dimensions for the shaft design. It consists of the type, size and position of the parts installed on the shaft, the way of fixing the parts, the nature, direction, size and distribution of the load, the type and size of the bearing, the roughness of the shaft, the manufacturing and assembly process, installation and transportation, and the alignment of the shaft. Factors such as deformation. The designer can design according to the specific requirements of the shaft. If necessary, several schemes can be compared to select the design scheme. The following are the general shaft structure design principles:
1. Save materials and reduce weight, try to adopt the cross-sectional shape with equal strength or large cross-sectional coefficient;
2. It is easy to accurately position, stabilize, assemble, disassemble and adjust the parts on the shaft;
3. Adopt various structural measures to reduce stress concentration and increase strength;
4. It is convenient for manufacturing and ensuring accuracy.