Lifting device for steel structure detection

The utility model discloses a lifting device for steel structure detection, which comprises a box body, a telescopic frame and a base, the box body is connected with the base through the telescopic frame, a motor is embedded in the central position in the bottom end of the box body, two output ends of the motor are fixedly connected with central holes of gears, and two sides of the two gears are rotatably connected with the inner wall of a first chute. The two first sliding grooves are formed in the two sides of the bottom of the box body, the two gears are engaged with the racks, the top ends of the two racks are fixedly connected with the outer wall of the bottom end of the telescopic box, and the telescopic box is slidably connected with the box body. The lifting mechanism is provided with the rack and the gear, the rack moves under the action of the gear to form a walking device, meanwhile, the sliding block and the sliding groove are arranged to ensure that the lifting mechanism cannot deviate from a tra