Sand adding transmission mechanism for motor train unit

The utility model relates to the technical field of motor train unit sand adding, and discloses a motor train unit sand adding transmission mechanism which comprises a sand storage box, the top of the sand storage box is fixedly connected with a hopper, the top of the hopper is fixedly connected with a top cover, the interior of the hopper is fixedly connected with a support, one side of the support is fixedly connected with a first motor, and the other side of the support is fixedly connected with a second motor. The output end of the first motor is fixedly connected with a crank, the outer wall of the crank is rotationally connected with a connecting rod, a first limiting groove is formed in the hopper, a first frame is arranged in the hopper, a gauze element is fixedly connected in the first frame, and a limiting assembly is arranged on the outer wall of the first frame. According to the sand adding transmission mechanism for the motor train unit, the output end of the first motor drives the crank to rotat