Clamping device composed of cab door frame roof side rail and upper sealing plate

The utility model discloses a cab door frame roof side rail and upper sealing plate combined clamping device which comprises a crank arm, a rib plate and a lead screw, the crank arm and the rib plate are both of an L-shaped structure, one end of the crank arm is detachably connected with one end of the rib plate to enable the whole to form a U-shaped clamping cavity, the other end of the crank arm is provided with a screw hole, and the screw hole is connected with the screw rod. One end of the lead screw assembly extends into the clamping cavity through the screw hole and is connected with the ejector head, and nylon protection cushion blocks are arranged on the ejector head and the inner side of the other end of the rib plate. The supporting and clamping device is formed through cooperation of the crank arm, the rib plate and the lead screw assembly, the defect that in the background technology, after the cab door frame roof side rail and the upper sealing plate assembly are installed and welded, the lower p