Handle rod limiting mechanism

The invention provides a handle rod limiting mechanism, which is characterized by comprising a handle rod, a positioning frame and step screws, wherein the handle rod is hollow, a handle rod fixing hole is formed in the bottom of the handle rod, the positioning frame body is of a straight structure with a fixing hole, a stroke groove is formed in the top of the positioning frame body, positioningholes are formed in the outer side walls of the two ends of the middle of the positioning frame body, connecting holes are formed in the bottom of the positioning frame body, and rotating teeth are integrally connected to the two sides.Gear transmission is stable, and vibration is small; the output rotating speed is constant without fluctuation; certain installation errors are allowed to exist inthe gear center distance, fluctuation of the output rotating speed cannot be caused, and assembling is convenient. The safety performance of the mechanism is greatly improved, the handle rod can be effectively prevented from b