Trapezoid flange three-claw clamping structure for vehicle purifier

The invention discloses a trapezoid flange three-claw clamping structure for a vehicle purifier, and relates to the technical field of automobile tail gas purifier welding. The trapezoid flange three-claw clamping structure comprises a cylinder, a support, a connecting plate, a supporting rod, connecting rods, fixing claws, a positioning plate and a positioning block. The cylinder is fixed to the support and connected with the connecting plate. The connecting plate slides on the supporting rod. One ends of the connecting rods are fixed to the connecting plate, and the other ends of the connecting rods are connected with the fixing claws. The positioning plate is fixed to the supporting rod. The fixing block is fixed to a fixing plate. According to the trapezoid flange three-claw clamping structure, the cylinder is adopted for driving the connecting plate, the connecting plate drives the connecting rods and the fixing claws to simply and rapidly clamp a trapezoid flange, powerful support is formed for the flan