Actuator cylinder for increasing spring mounting space

The utility model discloses an actuator cylinder capable of increasing spring installation space. The damper comprises an outer cylinder, a spring, a piston, an end cover and a piston rod, the outer cylinder is of a cylinder structure with one closed end. A boss is arranged at the bottom of the outer cylinder; boss for positioning spring, the spring and the piston are arranged in an inner cavity of the outer cylinder, the end cover is arranged at the open end of the outer cylinder, one end of the spring is fixed to the boss, the other end of the spring is connected with the piston, one end ofthe piston rod is fixedly connected with the piston through the end cover, the other end of the piston rod is located on the outer side of the end cover, and the piston can move in the inner cavity ofthe outer cylinder. According to the utility model, the actuator cylinder is adopted; the installation space of the spring can be increased in the same space, the large installation space can be obtained under the condition o