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What is the principle of a screw rod

Trapezoidal screw is a commonly used transmission component in various types of precision machinery. Its main function is to convert rotational motion into linear motion or torque into axial reciprocating force, while also possessing the characteristics of reversibility. Widely used in industries such as semiconductors, precision machine tools, woodworking machinery, electric tools, sports equipment, machinery, food machinery, optical instruments, automation equipment, printing machinery, automotive manufacturing equipment, laser engraving, artificial board machinery, electronics industry, papermaking machinery, positioning and load-bearing devices, conveying (manufacturing and transportation) devices, packaging machinery, etc.

Arc spiral grooves are machined on the screw and nut, and when they are assembled together, a spiral raceway is formed, which is filled with balls. And the ball rolls along the raceway and undergoes a cyclic motion through the return tube. The two ends of the return ball tube also serve as ball guards to prevent the ball from falling out along the raceway. 【 Precautions for using ball screw 】 (1) Please do not disassemble each part. Otherwise, it may lead to the entry of garbage or loss of functionality. (2) The screw shaft and nut may fall off due to their own weight after tilting, please be careful. (3) Please be careful not to let the ball screw fall or hit. Otherwise, it may cause scratches and damage. In addition, when subjected to impact, even if there is no visible damage on the appearance, it may lead to loss of function.

During the rolling process, the ball screw disengages from the screw and is called an external loop, while the one that always maintains contact with the screw is called an internal loop. During operation, each closed loop is called a column, and the number of leads contained in the closed loop is called the number of turns. Whether it is an external loop or an internal loop, it can be operated by our machine. The structure of the external loop is simple and widely used, but the disadvantage is that it is difficult to achieve smoothness at the joint of the raceway. Although internal circulation is used less frequently, its efficiency is relatively high, so when purchasing, everyone must objectively choose according to their own requirements.