Anti-failure ball ejector rod capable of being adjusted manually

The utility model discloses an anti-failure ball ejector rod capable of being adjusted manually. The anti-failure ball ejector rod capable of being adjusted manually comprises an adjustment ring, a sleeve and an output shaft, wherein one end of the output shaft is of a ball structure, a threaded groove is formed in the side wall of the other end of the output shaft, the output shaft is screwed in the sleeve through the threaded groove, two annular grooves are further formed in the side walls of the output shaft, the two annular grooves are communicated with the two ends of the threaded groove respectively, the threaded groove is deeper than the two annular grooves, and the position where one end of the threaded groove is connected with each annular groove is an oblique plane. According to the anti-failure ball ejector rod capable of being adjusted manually, due to the fact that the annular grooves are formed in the side wall of the output shaft, a thread disengagement sound is made when threads rotates to the limiting position, installation personnel can judge that the threads reach the limiting position according to the sound and adjustment can not be continued again, in this way, the situations of locking and device breakages is avoided, and manual adjustment failure is effectively prevented.