Linear non-rotary piston injection cylinder structure of injection molding machine

The invention discloses a linear non-rotary piston injection cylinder structure of an injection molding machine, which comprises a hydraulic oil motor, an injection oil cylinder, a transmission sleeve connected with the hydraulic oil motor, a transmission shaft, a screw rod and a material barrel, wherein one end of the transmission shaft is connected with the transmission sleeve; the screw rod is fixedly connected with the other end of the transmission shaft; the material barrel is arranged outside the screw rod in a sleeving manner; the injection oil cylinder comprises a hollow piston rod and a piston connected with the hollow piston rod; the transmission sleeve is arranged in the hollow piston rod in a sleeving manner; one end of the transmission shaft is arranged in the transmission sleeve in a sleeving manner; the piston is in a hollow structure; and the transmission shaft is arranged in the piston in a sleeving manner and connected with the piston. The linear non-rotary piston injection cylinder structure of the injection molding machine has the characteristics that the linear non-rotary piston injection cylinder structure is simple in structure, and has low moving component mass, good controllability and long service life, the piston does not rotate, and the structure is suitable for high-speed and high-precision injection molding product production.