The inner circulation adopts the inverter to realize the ball circulation. There are two types of inverters. Cylindrical convex key reverser, its cylindrical part is embedded in the nut, and the end is provided with a reverse groove. The reverse groove is positioned on the cylindrical outer surface and the round key 1 at the upper end to ensure alignment with the thread raceway direction. Oblate insert reverser, the reverser is a general round head flat key insert, the insert is embedded in the slot of the nut, and the end is opened with a reverse groove, which is positioned by the outer contour of the insert. Comparing the two inverters, the latter has a smaller size, which reduces the radial size of the nut and shortens the axial size. However, the outer contour of this reverser and the dimensional accuracy of the groove on the nut are required to be high.
Ball screw nuts can be divided into elbow type, circulator type and end cap type according to the circulation mode of the steel ball. The advantages of these three circulation methods. These models are the most typical nuts, which allow steel balls to circulate through the use of elbows. The steel ball is picked from the groove of the screw shaft and enters the elbow, and then returns to the groove for infinite loop motion.
