目前,我国农机化仍然处在发展阶段,收割机的可靠性还有待于进一步提高。以桂林联合收割机为例,其在作业过程中常常会因为各种原因使割刀堵塞,导致驱动连杆过载而变形断裂,因此必须安装一个安全离合器,进行防堵过载保护。1安全离合器的选用考虑到收割机的工作环境比较复杂,经比较,笔者认为钢球 At present, China’s agricultural mechanization is still in the development stage, the reliability of the harvester needs to be further improved. Take Guilin Combine Harvester as an example. During the operation, it often causes blockage of knives for various reasons, which leads to deformation and breakage of the drive connecting rod caused by overloading. Therefore, a safety clutch must be installed for anti-blocking and overload protection. 1 Selection of safety clutch Taking into account the harvester working environment is more complicated, the comparison, I think the ball