方型的外套式花键轴，它是花键轴的一种特殊形式，由花键轴和方形的外套组成。以下是其相关介绍：
• 结构特点：花键轴部分通常有纵向的键齿，可分为矩形花键轴、渐开线花键轴等。外套呈方形，套在花键轴外部，与花键轴的键齿相互配合，可在传递扭矩的同时，实现一些特定的功能，如导向、支撑等。
• 工作原理：当动力传递到花键轴时，键齿与外套的内表面相互作用，将扭矩传递给外套，进而带动与外套相连的其他部件一起转动或移动，实现机械动力的传递和转换。
• 应用场景：常用于需要传递较大扭矩，且对方位有一定要求的机械传动装置中，如某些数控机床的工作台进给机构、自动化生产线的传动部件等。
"square jacket-type spline shaft", which is a special form of spline shaft, consisting of a spline shaft and a square jacket. The following is a related introduction:
• Structural features: The spline shaft part usually has longitudinal key teeth, which can be divided into rectangular spline shaft, involute spline shaft, etc. The jacket is square and is sleeved on the outside of the spline shaft. It cooperates with the key teeth of the spline shaft, which can realize some specific functions such as guiding and supporting while transmitting torque.
• Working principle: When power is transmitted to the spline shaft, the key teeth interact with the inner surface of the jacket, transmitting torque to the jacket, and then driving other parts connected to the jacket to rotate or move together, realizing the transmission and conversion of mechanical power.
• Application scenario: It is often used in mechanical transmission devices that need to transmit large torque and have certain requirements for orientation, such as the worktable feed mechanism of some CNC machine tools, the transmission parts of automated production lines, etc.
Here following is the spline photo,about the sleeve of spline, we will not attach it here.
