Linear Motion Bearings

Abstract

The invention discloses a linear motion bearing. The linear motion bearing comprises an outer ring adopting a cylindrical structure, check rings respectively located at two ends of the outer ring, a retainer located in the outer ring and movably connected with the outer ring and balls arranged in the retainer, wherein the outer ring comprises annular grooves respectively formed in two ends of the inner side; the check rings are respectively clamped in the annular grooves; the retainer adopts an annular band structure and comprises a plurality of pocket groups parallelly formed in the axial direction of the outer ring at intervals; each pocket group comprises a plurality of pockets formed at intervals and encircled to form a lap; the balls are arranged in the pockets; and the pockets of every two adjacent pocket groups are staggered. Compared with the prior art, the linear motion bearing has the advantages of little wear, long service life, high motion accuracy, high bearing capacity and excellent stability.

Description

technical field [0001] The invention relates to the technical field of bearings, in particular to a linear motion bearing. Background technique [0002] Bearings are an important part of contemporary mechanical equipment. Its main function is to support the mechanical rotating body, reduce the friction coefficient during its movement, and ensure its rotation accuracy. Linear motion bearings are a type of bearings that can achieve linear motion, and are mainly used for linear strokes in conjunction with cylindrical shafts. Due to the point contact between the ball and the outer shell of the bearing, the ball rolls with the minimum frictional resistance, which has low friction and high stability, does not change with the bearing speed, and can obtain smooth linear motion with high sensitivity and high precision. Therefore, it is widely used in sliding parts of industrial machinery such as precision machine tools, textile machinery, food packaging machinery, and printing mach...

AI Technical Summary

Problems solved by technology

However, due to the tight arrangement of the balls in the rolling grooves of this kind of linear motion bearing, there is an interaction force between the balls, which makes the frictional force on the balls during motion large, easy to wear and has high motion noise, resulting in shortened service life of the linear motion bearing. Low motion precision and poor load-carrying capacity; when one of the balls stops moving, other balls in the same rectangular rolling groove will not be able to roll, thus making the linear motion bearing unable to work and affecting the stability of the linear motion bearing

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