The motor shaft is a cylindrical component that extends from the motor and its housing. The purpose of the shaft is to transfer the motor's energy. When no load is applied to the shaft, it will run at high speed under rated voltage, with the torque approaching zero. When sufficient load is applied to the shaft to bring it to a complete stop and reduce its speed to zero, torque is generated under rated voltage. What should be considered during the design process of the motor shaft?

The design of the shaft joint for electric motors should facilitate machining, measurement, assembly, and maintenance. Therefore, several key issues should be considered during the design of the shaft joint:

Consider the necessary elements for the finishing process. Reasonably determine the matching properties between the shaft and parts, the machining accuracy, and the surface roughness, ensuring the shaft diameter is as close as possible to the existing series values. When determining the length of each shaft section, aim to minimize the assembly size while ensuring requirements such as clearance. Each part on the shaft must fit without interference. To guide and prevent damage to the mating surfaces, chamfers or rounded guides should be present on the shaft alignment and台阶 areas. To reduce the variety of machining tools and improve production efficiency, the chamfers, radii, slots, etc., on the shaft should be of the same dimensions.

The above highlights key considerations for the design of motor shafts in electric tools. The motor shaft plays a crucial role in electric tools, serving as the source of power. Thus, it requires careful attention during manufacturing. A well-made motor shaft ensures the normal operation of electric tools, and consumers should also be meticulous in their selection when purchasing.