优点： 1. 实现了自动化控制，可以根据需求设定伸缩长度,Ball Screw Pair Abstract: Ball screw pair is a widely used transmission element in machinery industry. This paper introduces the working principle, structure and classification of ball screw pair, and analyzes the factors affecting the transmission accuracy and service life of ball screw pair. Finally, the development direction of ball screw pair is briefly discussed. Keywords: ball screw pair, working principle, structure, classification, transmission accuracy, service life 1. Introduction Ball screw pair is a kind of transmission element which uses the rolling motion of steel balls to transfer power. It is widely used in various machinery industries due to its high transmission efficiency, high accuracy, long service life and other advantages. With the development of machinery industry, the demand for ball screw pairs is increasing day by day, and the research on ball screw pairs is becoming more and more important. 2. Working principle The working principle of ball screw pair is to convert the rotary motion of the motor into the linear motion of the nut by using the rolling motion of the steel balls. The steel balls are sandwiched between the screw and the nut, and roll back and forth along the spiral groove of the screw and the nut. The frictional resistance between the steel balls and the groove is small, so the transmission efficiency is high. 3. Structure and classification The structure of ball screw pair can be divided into three parts: screw, nut and steel ball. According to the shape of the screw, ball screw pairs can be divided into two types: cylindrical and conical. According to the structure of the return system, ball screw pairs can be divided into two types: internal circulation and external circulation. According to the accuracy of the screw and nut, ball screw pairs can be divided into three types: C0, C3 and C5. 4. Factors affecting transmission accuracy and service life The transmission accuracy and service life of ball screw pair are affected by many factors, such as manufacturing accuracy, preload, lubrication, installation accuracy and working conditions. Among them, the manufacturing accuracy of the screw and nut is the most important factor affecting the transmission accuracy and service life of the ball screw pair. The preload of the ball screw pair has a great influence on the transmission accuracy, and the appropriate preload can improve the transmission accuracy. Lubrication is also an important factor affecting the service life of ball screw pair. Proper lubrication can reduce wear and prolong the service life of ball screw pair. 5. Development direction With the development of machinery industry, the demand for ball screw pairs is increasing day by day, and the research on ball screw pairs is becoming more and more important. In order to improve the transmission accuracy and service life of ball screw pairs, it is necessary to improve the manufacturing accuracy of screws and nuts, optimize the preload and lubrication, and improve the installation accuracy. At the same time, the development of new materials and new technologies can also improve the performance of ball screw pairs. 6. Conclusion Ball screw pair is an important transmission element in machinery industry, which has the advantages of high transmission efficiency, high accuracy and long service life. The transmission accuracy and service life of ball screw pair are affected by many factors, such as manufacturing accuracy, preload, lubrication, installation accuracy and working conditions. In order to improve the performance of ball screw pairs, it is necessary to optimize the design and manufacturing, improve the installation accuracy and working conditions, and develop new materials and new technologies.,导向装置能够确保升降平台的稳定性和安全性,这可以通过调整滚珠丝杠的前后盖板来完成, 3. 高效率：TBI滚珠丝杠的传动效率高达98%，比传统的螺旋丝杠高出很多, 乐山行星滚珠丝杠广泛应用于机床、自动化设备、工业机器人等领域，其主要优点包括高精度、高刚性、高效率、低噪声等,滚珠丝杠的选型要求包括以下几个方面： 1. 载荷要求：根据工作负荷、转速、工作环境等因素，选择适合的载荷范围,滚珠丝杠可分为：普通滚珠丝杠、双头滚珠丝杠、精密滚珠丝杠、高速滚珠丝杠、超长滚珠丝杠等类型, 2. 贴标法：将标记的数字或字母印刷在标签上，再将标签粘贴在滚珠丝杠表面上，常用于标记较多的情况, 5. 在螺母的两侧分别画出两个支架，用于支撑螺母