Bridge bottom inspection vehicle

The utility model discloses a bridge bottom inspection vehicle which comprises a fixed vehicle frame, a fixed seat is fixedly installed at one end of the top of the fixed vehicle frame, two guide rods are installed at the top of the fixed seat, the outer sides of rod columns of the two guide rods are sequentially connected with three clamping frames in a penetrating mode from top to bottom, and moving mechanisms are installed on the inner sides of the three clamping frames. The moving mechanism comprises two sets of mounting seats mounted on the inner sides of the three clamping frames, and the two sides of the two sets of mounting seats are connected with movable plates through movable pins. The rotating wheels are conveniently driven through rotation of a plurality of small motors on the moving mechanism, so that the crawler belt rotates to make contact with the bottom of a bridge and a bridge column for climbing, and the climbing efficiency is improved. The three clamping frames are driven to ascend and de