Rear supporting wheel device of sewing machine

The invention provides a rear supporting wheel device of a sewing machine, and belongs to the technical field of sewing machines. The problem that an existing rear supporting wheel device is complex in installation and poor in universality is solved. The rear supporting wheel device of the sewing machine comprises a pull rod assembly, a driving wheel assembly and a supporting wheel shaft, and is characterized by further comprising an installation frame and a driven wheel assembly, wherein the installation frame is connected with a sewing machine shell through the supporting wheel shaft, and the driving wheel assembly and the driven wheel assembly are installed on the installation frame and connected through a synchronous belt; and the pull rod assembly can drive a driving wheel in the driving wheel assembly to rotate in one direction. The rear supporting wheel device has the advantages of being convenient to disassemble and assemble and high in universality. 本发明提供了一种缝纫机的后拖轮装置，属于缝纫机技术领域。它解决了现有的后拖轮装置其安装繁琐且通用性差的