Crank arm is the one of the important components of air compressor and bears the drastic dynamic load during its working prcess.And then the dynamic load is transfered to the bolts and the nuts connecting the crank arm body and the top.

• 连杆是空压机重要构件之一，其在工作过程中承受着急剧变化的动载荷，这一动载荷又传递到连杆体和连杆盖的两个连接螺栓及螺母上。