Metal base plate with positioning installation structure

The utility model discloses a metal backing plate with a positioning mounting structure, which comprises a metal backing plate body, movable sleeve plates, a driven gear and a driving gear, the movable sleeve plates are symmetrically arranged at two ends in the metal backing plate body, one end of each movable sleeve plate is connected with an L-shaped mounting plate, mounting holes are distributed in the bottom of the L-shaped mounting plate at equal intervals, and the driving gear is connected with the L-shaped mounting plate. The interiors of the two movable sleeve plates are connected with screw rods, the ends of the two screw rods are connected with driven gears, and the side portions of the two driven gears are connected with the driving gear in a meshed mode. According to the utility model, the driven gear, the driving gear, the screw rod, the controlled rocking handle and the movable sleeve plate are matched for use, so that the range of the movable sleeve plate and the connected L-shaped mounting pla