Inner circulation ball screw pair with Archimedes screw transition curved surface

Abstract

The invention discloses an inner circulation ball screw pair with an Archimedes screw transition curved surface. The inner circulation ball screw pair comprises a screw rod, a nut, a ball and a reverser. The outer side of the screw rod and the inner side of the nut are both provided with spiral ball grooves, and the ball grooves are matched with each other to form a spiral rolling path. The ball is mounted in the spiral rolling path. A reverser mounting groove is formed in the nut of the ball screw pair. The reverser is put in the reverser mounting groove to form a complete ball circulation channel. The Archimedes screw transition curved surface is arranged between the reverser circulation channel and the spiral rolling path so that the ball can move smoothly between the spiral rolling path and the reverser. According to the inner circulation ball screw pair with the Archimedes screw transition curved surface, a reasonable reverser ball returning curve is designed, and the curved surface structural design of the transition position of the spiral rolling path and the reverser of the ball screw pair is improved; and the Archimedes screw transition curved surface is additionally arranged, the ball can move in the circulation channel more stably and smoothly, the performance of the ball screw pair is improved and the service life of the ball screw pair is prolonged.

Description

technical field [0001] The invention relates to the technical field of ball screws, in particular to an inner circulation ball screw pair with an Archimedes spiral transition surface. Background technique [0002] The ball screw pair is a transmission mechanism that converts rotary motion into linear motion or torque into axial reciprocating force. It has the characteristics of high precision, high efficiency, and high reliability. It is widely used in machinery, aerospace, aviation, Nuclear industry and other fields. [0003] The internal circulation ball screw pair makes the balls circulate and return through the return device installed on the nut, which is the most commonly used ball screw pair structure. The reverse device is a key part of the internal circulation ball screw pair, and its structure directly affects the smoothness of the ball screw pair, noise, temperature rise and other performance. The bead return curve of the retrograde device is formed by the inters...

AI Technical Summary

Problems solved by technology

According to the processing accuracy of the retrograde mounting groove on the retroverter and the nut at present, the diameter of the retroverter circulation channel is generally 0.3mm to 0.7mm larger than the diameter of the ball, so there will be a gap between the retroverter circulation channel and the ball raceway. Steps, the balls must cross the steps when they enter and leave the channel of the reverser, which will cause the ball screw to produce pinch and noise

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