Wheel self -locking mechanism

The utility model discloses a wheel self -locking mechanism, including the tire and automobile body fixed connection's frame, fixed connection has the micro motor who is used for providing power in the frame, the last worm gear mechanism that forms by worm wheel and worm that is connected with of micro motor, the worm in the worm gear mechanism is connected with micro motor, the central fixed connection of worm wheel have with worm wheel vertically worm wheel pole, the screw department of worm wheel pole is connected with the brake pads, on the worm wheel pole the centre of worm wheel and brake pads still be equipped with discoid lead to slide coil the screw end -to -end connection tire of worm wheel pole, it is equipped with the sliding pair to lead between smooth dish and the brake pads, the tire center is equipped with the recess, and shape, the size of this recess are the same with shape, the size of brake pads. Wheel self -locking mechanism simple structure, utilize this mechanism conveniently to manage the shopping cart, prevent that client from releasing the restricted area periphery with the shopping cart.