Ball screw structure and principle

Ball screws are ideal for converting rotary motion into linear motion or converting linear motion into rotary motion.

Ball screw structure:

       The structure of the ball screw pair is traditionally divided into an inner circulation structure (represented by a circular reverser and an elliptical reverser) and an outer circulation structure (represented by a cannula). These two structures are also the most commonly used structures. There is no essential difference between the two structural properties, except that the inner loop structure has a small installation and connection size; the outer loop structure has a large installation and connection size. At present, there are more than 

10 types of ball screw pairs, but the more commonly used ones are: inner circulation structure; outer circulation structure; end cover structure; cover structure.

Ball screw principle:

     1, in accordance with the national standard GB/T17587.3-1998 and application examples, the ball screw (currently has basically replaced the trapezoidal screw, commonly known as the screw) is used to convert the rotary motion into a linear motion; or convert the linear motion into a rotation Motion actuators with high transmission efficiency, accurate positioning, etc.

    2. When the ball screw is used as the active body, the nut will be converted into a linear motion according to the lead angle of the screw according to the rotation angle of the corresponding screw. The passive workpiece can be connected through the nut seat and the nut to realize the corresponding linear motion.

Ball screw features:

1. The driving torque is 1/3 compared with the sliding screw pair

There are a lot of balls between the screw shaft and the nut of the ball screw for rolling motion, so that high movement efficiency can be obtained. Compared with the past sliding screw pair, the driving torque is less than 1/3, that is, the power required to achieve the same motion result is 1/3 of the use of the rolling screw pair. It is very helpful in saving electricity.

2, high precision guarantee

The ball screw is continuously produced in the world's highest level of machinery and equipment made in Japan. In particular, in the factory environment for grinding, assembling and inspecting various processes, the temperature and humidity are strictly controlled, due to the perfect quality management system. The accuracy is fully guaranteed.

3, micro feed may be

Since the ball screw is moved by the ball, the starting torque is extremely small, and there is no creep phenomenon such as sliding motion, and accurate micro feed can be ensured.

4, no backlash, high rigidity

The ball screw can be pressurized, and the axial clearance can reach a negative value due to the pre-pressure, thereby obtaining higher rigidity (the ball is pressurized by the ball screw, when actually used for mechanical devices, etc., due to the ball Repulsive force can increase the rigidity of the silk mother).

5, high-speed feed may

Since the ball screw has high movement efficiency and low heat generation, high-speed feed (motion) can be realized.