Motor gear box

The utility model relates to the technical field of door locks, and discloses a motor gear box. The linkage piece of the motor gear box is attracted to the gear shaft through magnetic attraction forcewhen the first gear does not rotate, after the power device drives the first gear to rotate, the abutting piece on the first gear abuts against the linkage piece, the linkage piece is embedded into the first limiting groove, and therefore synchronous rotation of the first gear and the second gear is achieved. And moreover, after the first gear stops rotating, the linkage piece is separated from the first limiting groove and adsorbed to the gear shaft again, so that the first gear is separated from the second gear. By means of the mode, the smoothness of the gear clutch process can be improved, and the risk that the motor gear box is blocked and jammed is reduced. 本实用新型涉及门锁技术领域，公开了一种马达齿轮箱。该马达齿轮箱的联动件在第一齿轮未自转时通过磁性吸附力吸附于齿轮轴，在动力装置带动第一齿轮自转后，第一齿轮上的抵推件抵接联动件，并使得联动件嵌入第一限位槽，从而实现第一齿轮和第二齿轮同步自转。并且，在第一齿轮停止自转后联动件脱离第一限位槽并重新吸附于齿轮轴