蜗轮蜗杆传动升降台自锁失效分析

Self-locking Failure Analysis of Lifting Platform of Worm and Gear Drive

分析了蜗轮蜗杆升降台的基本结构,从蜗轮蜗杆外部受力、蜗轮蜗杆自身受力分析出发,详细分析了蜗轮蜗杆安装位置偏移对受力的影响fx。通过以上分析,可以看出当蜗轮蜗杆的中间平面安装位置存在偏差时,即传动中间平面极限偏差超出极限时,就会影响机构的自锁,当磨损导致γ角大于当量摩擦角时,就会失去自锁。

The basic structure of the lifting platform were analyzed, as well as the external force to worm and gear, and its force analysis about worm and gear. And the installation position offset influence on stress was analyzed in detail. Through the above analysis, we can see that there is a deviation in the middle of the plane installation position of worm to gear, that is to say when the deviation is beyond the limit, which will affect the self-locking of institution. And the institution will lose the lock when angle is greater than the equivalent friction Anzle.