Narrow lengthened high-walking parallelism beads and columns mixed linear guide rail

Abstract

The invention discloses a narrow lengthened high-walking parallelism beads and columns mixed linear guide rail. The liner guide rail comprises a guide rail(1) and a sliding block(2) matched with the guide rail(2), wherein the top surface of the guide rail(1) is a main moving surface for bearing positive pressure of a moving heavy-load object, a row of large rolling columns(3) is positioned on thetop surface of the guide rail(1), the two sides of the guide rail(1) are guide surfaces of bearing capacity, and two rows of rolling beads(4) are respectively positioned at the two sides of the guidesurfaces to restrain the deviation tendency of left, right and radial rotation of the moving object; the walking parallelism of the sliding block(2) and the guide rail(1) is 0.001-0.02mm, the length size of the sliding block(2) is 65-480mm, the width size of the sliding block(2) is 30-245mm, and two returning devices(5) are arranged at the left end and the right end of the sliding block(2). According to the linear guide rail, the interval between the sliding block and the guide rail is small through the controlling of the walking parallelism of the sliding block and the guide rail reference surface, so that the vibration of the linear guide rail is weakened, the frictional damping between the guide rail and the sliding block is reduced, and the motion precision of the linear guide rail isimproved.

Description

technical field [0001] The invention relates to the technical field of linear guide devices, in particular to a narrow-width, elongated, high-travel parallelism bead-column mixed linear guideway. Background technique [0002] The linear guideway is to place rolling elements between the slider and the guide rail, so that the sliding friction between the slider and the guide rail becomes rolling friction, which greatly reduces the motion friction resistance between the two. Linear guide rail is mainly composed of guide rail, slider, rolling body, return device and so on. When the guide rail and the slider move relative to each other, the rolling body rolls along the raceway on the guide rail, and at the end of the slider, the rolling body enters the raceway again through the return device, and the linear guide rail rolls repeatedly in this way. [0003] As a transmission functional component, linear guides have gradually replaced the dominant position of sliding guides due to...

AI Technical Summary

Problems solved by technology

[0004] With the wide application of linear guides in high-precision equipment, the existing single ball-type and roller-type linear guides fix the guide rail on the plane of the base seat of high-precision equipment. When the slider bears high load and moves linearly along the guide rail , the running parallelism error between the slider and the reference plane of the guide rail is large, the gap between the slider and the guide rail gradually increases, and the contact area between the slider and the guide rail gradually decreases, resulting in the gradual increase of the gap between the rolling body, the guide rail and the slider , so that the linear guide is prone to vibration, increasing the frictional damping between the guide and the slider, and reducing the motion accuracy of the linear guide

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