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在机械零件中,皮带轮与电机主轴一般采用平键或半圆键联接来传递扭矩。这种结构的缺点在于皮带轮内孔和电机主轴的配合往往不够精密,而不适应要求传动平稳的高速传动,又为了防止皮带动轮在正作过程中沿轴向移动,皮带轮与电机主轴通过键结合都带有一定紧度,或者用螺钉在径向方向固定,这样皮带轮在装卸时往往需要敲打,给维修带来不便,
In mechanical parts, the pulley and motor shaft generally use flat key or semi-circular key to connect the torque transmission. The disadvantage of this structure is that the inner bore of the pulley and the motor spindle are often not precise enough to meet the requirement of stable high-speed transmission. In addition, in order to prevent the belt pulley from moving in the axial direction during normal operation, the pulley and the motor spindle are keyed With a certain tightness, or fixed with screws in the radial direction, so that when loading and unloading the pulley often need to beat, bring inconvenience to the maintenance,