Push rod

The invention discloses a push rod. The push rod comprises a first screw rod assembly, a second screw rod assembly, a first gear and a second gear. The first screw rod assembly comprises a first screwrod and a first screw rod sleeve. The second screw rod assembly comprises a second screw rod and a second screw rod sleeve, and thread pitches of threads of the surface of the second screw rod and threads of the surface of the first screw rod are same and the direction of turning is opposite. The first gear meshes with the second gear. The first screw rod sleeve and the second screw rod sleeve move synchronously forwards or backwards, and therefore the push rod changes rotation to straight-line movement. The whole intensity of the screw rod sleeves is improved, and therefore the intensity ofthe push rod is higher. 本发明公开了种推杆，包括第丝杆组件、第二丝杆组件、第齿轮、第二齿轮；第丝杆组件包括第丝杆和第丝杆套，第二丝杆组件包括第二丝杆和第二丝杆套，所述第二丝杆表面的螺纹与所述第丝杆表面的螺纹螺距相同且旋向相反；所述第齿轮与所述第二齿轮啮合。第丝杆套、第二丝杆套同步地向前或向后运动，所以该推杆将转动变成了直线运动。丝杆套的整体强度提高，所以该推杆强度较高。