Efficient and energy-saving double-rod-cavity injection oil cylinder structure

The invention relates to the field of injection oil cylinders, and discloses an efficient energy-saving double-rod-cavity injection oil cylinder structure which comprises a main cylinder body. The injection oil cylinder structure further comprises an auxiliary cylinder body installed on the main cylinder body in a penetrating mode, a piston rod assembled in the main cylinder body and the auxiliary cylinder body in a sliding mode, a main oil port formed in the main cylinder body, an auxiliary oil port formed in the auxiliary cylinder body and a dust cover fixedly assembled on the piston rod and arranged on the main cylinder body in a sliding and sleeving mode. A cooling assembly for reducing the temperature of the outer wall of the piston rod and the inner wall of the main cylinder body is installed on the main cylinder body, and a transmission assembly for controlling the opening state of the cooling assembly is installed between the main cylinder body and the dustproof cover. The cooling assembly is arranged