Reciprocating screw is a kind of screw that can make the slider realize reciprocating motion without changing the direction of spindle rotation. Reciprocating screw is a form of three-dimensional cam pair, which is manifested by two threaded grooves of the same pitch and opposite rotation. The two ends are connected with excessive curves. Through the rotation of the screw, is the side of the spiral groove to promote the slider placed in the spiral groove for axial reciprocating motion.
Screw or called "screw" drive, is a spiral transmission, ball screw (has basically replaced the trapezoidal screw, commonly known as screw) is used to convert rotary motion into linear motion; or linear motion into rotary motion of the actuating element, and has a high transmission efficiency, positioning accuracy, etc.; when (ball) screw as the active body, or the linear motion into the rotary motion of the executive element, and has high transmission efficiency, positioning accuracy, etc.; when (ball) screw as the active body, or the linear motion into the rotary motion of the executive element. ) screw as the active body, the nut will be converted into linear motion with the rotation angle of the screw in accordance with the corresponding specifications of the guide, the passive workpiece can be connected through the nut seat and the nut, so as to realize the corresponding linear motion.
Hydraulic transmission is the use of hydraulic pumps to convert the mechanical energy of the prime mover into liquid pressure energy, through the change of liquid pressure energy to transfer energy, through a variety of control valves and piping, with the help of hydraulic actuating elements (hydraulic cylinders or motors) to the conversion of liquid pressure energy into mechanical energy, so as to drive the working mechanism, to realize the linear reciprocating and rotary motion.