Elevator car specification detection device

The elevator car specification detection device comprises a U-shaped plate, the inner side of the U-shaped plate is rotatably connected with a screw rod, the outer wall of the screw rod is in threaded connection with a movable block, a connecting block is welded to the surface, corresponding to the inner side wall of the U-shaped plate, of the movable block, a through hole is formed in the joint of the connecting block and the U-shaped plate, rolling wheels are arranged above and below the connecting block, and the rolling wheels are in threaded connection with the screw rod. The end, close to the servo motor, of the screw rod penetrates through the U-shaped plate, the power output end of the servo motor is connected with the penetrating end of the screw rod through a coupler, and the displayer is installed on the outer side wall of the U-shaped plate. According to the utility model, after the laser emitted by the optical ranging radar irradiates the end part of the inner side of the U-shaped plate, part of t