A new patented technology is used to provide a tricycle seat backrest structure, which solves the problem that the traditional tricycle seat is inconvenient for engine disassembly or maintenance.
a seat bracket and a chair bracket, two ends of the seat bracket are respectively provided with downward extending mounting feet, and the lower end of the seat and the lower end of the mounting feet are provided with fixing plates. The chair support comprises a fixed frame, the lower end of the fixed frame is connected with a transition frame with a rectangular frame structure, the transition frame is superposed on the upper end face of the seat support, and the front edge of the transition frame is rotatably connected with the front edge of the seat support, thus forming a structure that the fixed frame and the transition frame rotate along the front edge direction of the seat support.