Fine adjustment mechanism for connecting point switch with external locking device

The utility model belongs to the technical field of point switch auxiliary devices, and particularly relates to a fine adjustment mechanism used for connecting a point switch and an outer locking device. The movable joint comprises a movable joint assembly, the movable joint assembly is used for connecting the inner side end of a locking joint rod and the inner side end of an action joint rod together, and the axial distance between the locking joint rod and the action joint rod can be adjusted through the movable joint assembly; the movable joint assembly comprises an adjusting sleeve, one end of the adjusting sleeve is connected with the action joint rod through threads, and the other end of the adjusting sleeve is detachably and fixedly connected with the locking joint rod; according tothe utility model, the problems that the length of the action connecting rod cannot be finely adjusted and the operation steps are complicated in the prior art can be solved. 本实用新型属于转辙机辅助装置技术领域，尤其是涉及一种用于转辙机和外锁闭装置连接的微调机构；包括一个