Aluminium-alloy window wheel carriage

The utility model relates to a window wheel bracket made of aluminium alloy, comprising an outer supporting plate, an inner movable plate, an idler wheel, a shaft, etc. The utility model is characterized in that the left lower corner and the upper part of the outer supporting plate are respectively provided with an inclined cutting edge and a supporting hanging block. A gap slot which can be moved or moved out along the supporting hanging block on the outer supporting plate is arranged on the inner movable plate. When the window wheel bracket is replaced, so long as the gap slot of the inner movable plate is taken out of the supporting hanging block on the outer supporting plate, the outer supporting plate, the inner movable plate, the idler wheel and a wheel shaft can be separated with each other, and the idler wheel and the wheel shaft are arranged in the outer supporting plate and the inner movable plate. Therefore, the utility model has the advantages of convenient and fast replacement and convenient and fast disassembly.