Stereo garage and transmission pinion clearance adjusting mechanism thereof

The utility model provides a transmission pinion clearance adjusting mechanism. The transmission pinion clearance adjusting mechanism comprises a first adjusting mechanism and a second adjusting mechanism. Wherein the first adjusting mechanism is used for adjusting a gear clearance of helical teeth of the worm relative to the worm gear; and the second adjusting mechanism is used for adjusting a gear clearance between a motor gear of the speed reducing motor and a worm gear of the worm. Firstly, helical teeth of the worm are adjusted to a proper gear clearance value relative to the worm gear so as to ensure that the worm is accurately meshed with the worm gear, and then a motor gear of the gear motor is adjusted to a proper gear clearance value relative to a worm gear of the worm so as to ensure that the motor gear is accurately meshed with the worm gear. By the adoption of the transmission pinion clearance adjusting mechanism, the gear clearance in the whole stand column can be adjusted, and accurate transmis