What is reciprocating lead screw?

往復絲杠是能夠在不改變主軸轉動方向前提下，使滑塊實現往復運動的一種絲杠。往復絲桿是立體凸輪賦的一種形式，其表現是兩條螺距相同、旋向相反的螺紋槽。兩端用過渡曲線連接。通過絲桿的旋轉，是螺旋槽側面推動置于螺旋槽內的滑塊作軸向往復運動。

Reciprocating lead screw is a kind of lead screw that can make the slider realize reciprocating motion without changing the rotation direction of the main shaft. Double screw rod is a form of stereo cam, which is represented by two thread grooves with the same pitch and opposite direction. Both ends are connected by transition curve. Through the rotation of the screw rod, the sliding block placed in the spiral groove is pushed by the side of the spiral groove to make axial reciprocating motion.

絲杠或者叫做“絲桿”傳動，是一種螺旋傳動方式，滾珠絲杠（已基本取代梯形絲桿，俗稱絲桿）是用來將旋轉運動轉化為直線運動；或將直線運動轉化為旋轉運動的執行元件，并具有傳動效率高，定位準確等特點；當(滾珠)絲杠作為主動體時，螺母就會隨絲桿的轉動角度按照對應規格的導程轉化成直線運動，被動工件可以通過螺母座和螺母連接，從而實現對應的直線運動。

The lead screw, or "screw" transmission, is a spiral transmission mode. The ball screw (which has basically replaced the trapezoidal lead screw, commonly known as the lead screw) is used to convert the rotary motion into linear motion; Or the actuator that converts linear motion into rotary motion, and has the characteristics of high transmission efficiency and accurate positioning; When the (ball) lead screw is used as the driving body, the nut will be transformed into linear motion according to the lead of the corresponding specification with the rotation angle of the lead screw. The passive workpiece can be connected with the nut through the nut seat, so as to realize the corresponding linear motion.

液壓傳動是利用液壓泵將原動機的機械能轉換為液體的壓力能，通過液體壓力能的變化來傳遞能量，經過各種控制閥和管路的傳遞，借助于液壓執行元件(液壓缸或馬達)把液體壓力能轉換為機械能，從而驅動工作機構，實現直線往復運動和回轉運動。

Hydraulic transmission is to use the hydraulic pump to convert the mechanical energy of the prime mover into liquid pressure energy, transfer energy through the change of liquid pressure energy, transfer through various control valves and pipelines, and convert the liquid pressure energy into mechanical energy with the help of hydraulic actuator (hydraulic cylinder or motor), so as to drive the working mechanism and realize linear reciprocating motion and rotary motion.

雙向絲杠是在一根絲杠上制出兩段旋向不同的螺紋，即一段右旋螺紋，一段左旋螺紋。旋在其上的右、左旋螺母，分別連接著運動機件。當絲杠旋轉時，該兩個運動機件隨著螺母快速趨近或分離，從而產生要求的機械功能。雙向絲杠排線均勻，能完全按設定的間距排線，往復換向可靠，當工字輪窄時短時間換向尤為突出，不存在誤動作換向問題。排線推力大，不產生壓絲，不會造成放不出絲現象。結構簡單，制造方便。

Two way lead screw is to make two sections of threads with different rotation directions on one lead screw, that is, one section of right-hand thread and one section of left-hand thread. The right and left nuts screwed on them are respectively connected with the moving parts. When the lead screw rotates, the two moving parts quickly approach or separate with the nut, resulting in the required mechanical function. The two-way lead screw is evenly arranged, and can completely arrange the line according to the set spacing. The reciprocating reversing is reliable. When the I-wheel is narrow, the short-time reversing is particularly prominent, and there is no misoperation reversing problem. The wire arrangement thrust is large, which does not produce wire pressing and will not cause the phenomenon that the wire cannot be put out. The utility model has the advantages of simple structure and convenient manufacture.

絲杠車削加工成形，成本低，使用周期長，絲杠能連續使用多年不更換，只要換舟狀導塊，維修簡便。恒排線距收卷或采用伺服電機傳動可改變排線距，從始繞到滿盤變排距收卷。交叉絲杠就是往復絲杠，就是以它的形狀來定義的，就像叉號一樣吧，也有人叫它為花軸，因為像花一樣吧，還有人叫雙向絲杠，因為它是左右的旋轉的，提醒大家但是要和左右旋向兩頭旋轉的區分開來，這個雙向是左右的移動，而不是像兩端左右的移動的。

The lead screw is formed by turning, with low cost and long service cycle. The lead screw can be used continuously for many years without replacement. As long as the boat guide block is replaced, the maintenance is simple. Constant winding distance or servo motor drive can change the winding distance and change the winding distance from the beginning to the full reel. The cross lead screw is a reciprocating lead screw, which is defined by its shape. It is like a cross. Some people call it a flower shaft, because it is like a flower. Others call it a two-way lead screw, because it rotates left and right. Remind everyone, but it should be distinguished from the one rotating left and right to both ends. This two-way movement is left and right, not left and right at both ends.

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