Nut rotary ball screw is a common mechanical transmission element, as an important transmission device, the use of ball screw can not only improve the operating efficiency of the equipment, but also effectively reduce the operating cost of the equipment. So, what are the unique advantages and characteristics of nut rotary ball screws?
1. What is a nut rotating ball screw?
Nut rotary ball screw is a nut rotary ball screw device that integrates a single nut ball screw with a support bearing. The nut is a steel ball circulation structure using the circulator method, and the steel ball moves along the circulator groove installed inside the nut to the adjacent rolling surface, and then circulates in the load area to carry out an infinite rolling motion.
Due to external factors, when the motor is operating in the low-speed range, torque and speed are prone to unevenness. The motor can be connected independently to the nut of the lead screw shaft and ball screw, thus keeping the fretting feed within the stable rotation range of the motor.
Second, the characteristics of the nut rotating ball screw
1. Achieve zero axial clearance——The rotation direction of the ball spline has no invalid stroke, and the angular contact structure ensures high-precision positioning.
2. Lightweight and compact design——This feature enables the ball screw to have a smaller volume while ensuring high precision.
3. The nut is light and has low inertia- The lightweight nut and its small inertia force bring the advantage of high responsiveness, which is conducive to fast response.
4. Silent and smooth movement——The use of the end cap circulation method ensures the low noise and smoothness of the ball screw's operation.
5. High rigidity of support bearings——The support bearings on both sides of the ball screw adopt high rigid contact angles of 60° and 30° respectively to ensure the stability of the support.
6. Easy to install- The ball spline nut is designed so that the nut can be easily removed from the shaft without the ball falling off, simplifying the assembly process. The ball screw is simply bolted to the support seat and can be installed quickly (H7 is recommended for the inner diameter tolerance of the support seat).
3. Why choose nut rotary ball screw
The nut rotary ball screw is adopted, and the servo motor acts directly on the nut to realize the linear motion of the workpiece. This design reduces heat generation, moment of inertia and noise, especially in terms of increasing feed rates.
In the process of engineering design, engineers are often faced with the need for a large working stroke of more than 7 meters, while the conventional ball screw is limited in use due to its large dead weight and increased moment of inertia. In this case, it is often necessary to switch to a rack and pinion drive system.
The nut rotating ball screw system can effectively solve the problem of sagging caused by the weight of the lead screw. With the right support, nut-rotating ball screws can theoretically be designed to be infinitely long, providing an ideal drive solution for large equipment that exceeds conventional limits.
Fourth, how to use the nut rotary ball screw
Special support bearings are inserted directly into the outer circle of the nut of the ball screw and ball spline. By rotating or stopping the nut and spline nut, it is possible to perform three types of movement (rotary, linear, and spiral) with just one shaft.