Application number/patent number: 200720 1740 15.
The utility model discloses a fixture for detecting the air tightness of an automobile expansion water tank, which belongs to tooling; It aims to provide an airtight detection fixture with reliable positioning and clamping, good sealing effect and high labor productivity. It comprises a positioning clamping device; The positioning device consists of a base (5), an X-direction positioning plate (3), a front auxiliary bracket (4), a rear auxiliary bracket (2), a Y-direction positioning plate (6) and a Z-direction positioning plate (7); The clamping device consists of a vertical plate (8) fixed on the base (5), cylinders (1) fixed on the rear auxiliary bracket (2) and the vertical plate (8) respectively, pressing blocks (9) fixed on the piston rods of each cylinder, and rubber pads embedded in pressing block grooves (10). The utility model has simple structure and convenient operation, and is an ideal tool for detecting the air tightness of the automobile water storage tank and the expansion tank.