High-speed and low-noise precise ball screw pair

Abstract

The invention discloses a high-speed and low-noise precise ball screw pair which consists of a ball screw, a ball nut, balls, an elastic buffer, an elastic reverse damper, a nut shell and a seal ring, wherein the ball screw is sheathed with the ball nut, roller paths are arranged on an outer circle of the ball screw and an inner circle of the ball nut, and the roller paths are internally providedwith the balls; and two ends of the ball nut are provided with reverse grooves, and each reverse groove is provided with the elastic buffer, the elastic reverse damper and a through ball return channel respectively. Under a high-speed motion condition, the high-speed precise ball screw pair structure can effectively overcome shock and vibration generated in the returning process of the ball in the rolling and autorotation directions and absorb a large quantity of frictional heat generated in the motion of the ball rolls, thus being capable of solving the problems of noise, vibration and heating of the precise ball screw pair under the high-speed motion condition.

Description

Technical field: [0001] The present invention relates to a ball screw pair structure of the present invention, in particular to a precision ball screw pair under high-speed operation conditions. The invention can solve the noise, vibration and heating problems of the precision ball screw pair under the high-speed operation condition. Background technique: [0002] With the development of mechanical products in the direction of high speed, high efficiency and automation, the feed drive speed of industrial robots, CNC machining centers and mechatronics machinery is constantly increasing. Rapid positioning, high-speed cutting, and high-speed driving have put forward new requirements for rolling functional components. [0003] In the existing ball screw pair nut ball return structure, although the circular arc tangential or elliptical transition method is adopted to solve the motion problem of the ball screw pair at low and medium speeds, but at high speeds, this The angle at ...

AI Technical Summary

Problems solved by technology

[0003] In the existing ball screw pair nut ball return structure, although the circular arc tangential or elliptical transition method is adopted to solve the motion problem of the ball screw pair at low and medium speeds, but at high speeds, this The angle at the corner of the helical groove of the ball with this structure is large, and the transition is not smooth, which leads to the continuity of the first and second derivatives of the ball in the rolling direction, and the discontinuity of the third derivative; at the same time, the continuous first derivative and the second derivative in the direction of rotation. The first derivative and the third derivative are discontinuous, thus causing the ball movement to be unstable, resulting in shock and vibration, as well as a large amount of frictional heat, which greatly restricts the increase of lead and rotational speed, and also limits the high speed of the ball screw pair. Carrying capacity

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