Aluminium alloy window wheel frame

The utility model relates to a window wheel bracket made of aluminium alloy, which comprises an outer supporting plate, an inner movable plate, an idler wheel, a shaft, etc. The utility model is characterized in that crossed gap slots are respectively arranged on the front and the back planes of the outer supporting plate and the inner movable plate at corresponding positions. Both ends of a detachable wheel shaft are respectively supported in the two crossed gap slots, and the wheel shaft can be moved up and down relatively along the two slots. When the window wheel is replaced, the wheel shafts arranged on the inner movable plate and the idler wheel are respectively taken out along the two gap slots, and then the detachable wheel shaft is disassembled from both sides of the idler wheel to complete the replacement of the window wheel. The whole disassembling process is very convenient and fast, and the utility model eliminates the complicated operation that a window frame and the glass of a whole window need disassembling totally in the replacement of the window wheel at present.