Cloth dragging wheel mechanism for sewing machine

The utility model discloses a cloth dragging wheel mechanism for a sewing machine, which comprises a mounting frame, a driving unit and a cloth dragging wheel, the driving unit is fixed on the mounting frame, the mounting frame further comprises a cloth dragging wheel lifting device, a cloth dragging wheel lifting rod penetrates through the cloth dragging wheel lifting device, the cloth dragging wheel lifting rod is connected with a lifting support with a screw, and the lifting support is connected with the cloth dragging wheel. A main shaft of the driving unit is connected with a lifting rotating rod and a transmission rod, the lifting rotating rod is hinged to a lifting connecting rod, the lifting connecting rod is provided with a long kidney-shaped hole, a sliding screw is located in the long kidney-shaped hole and slides in a reciprocating mode, the transmission rod is connected with a two-way joint bearing, the other end of the transmission rod is provided with a transmission sub-rod, and the transmissio