Linear Roller Guide Unit with Six Rows for Compressive Load
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Solution Overview
Problem
Existing linear roller guide units face issues with structural strength, precision, and service life under compressive loads due to uneven distribution of load on rollers, leading to material fatigue and deformation.
Innovation Solution
A linear roller guide unit design featuring six rows of rollers with specific contact angles and a circulation path, including retaining members, turning members, and hollow circulation pipes, distributed across an I-shaped rail and U-shaped slide block, to evenly distribute compressive loads and enhance structural integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If four-row type linear roller guide unit is used, then the structure is simple, but the compressive load capacity is poor and trumpet deformation occurs
Solution Approach 1:
The linear roller guide unit is segmented into six independent roller rows arranged in three pairs, with each pair positioned at different heights. This segmentation allows the compressive load to be distributed across multiple roller rows rather than concentrated on a single row, thereby increasing the overall compressive load capacity while maintaining structural organization through systematic arrangement.
2Ease of operation
If balls are used instead of rollers, then the guide unit can operate, but the contact stress is large and service life is reduced
Solution Approach 1:
The invention uses rollers with curved surfaces instead of spherical balls. The roller configuration provides line contact or extended surface contact with the rail, as opposed to the point contact of balls. This curvature design maintains the operational smoothness and ease of movement while significantly reducing contact stress concentration, thereby extending the service life of the linear roller guide unit under compressive loads.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design significantly increases the service life, structural strength, and load capacity while improving impact resistance and precision of the linear roller guide unit, allowing for mass production through plastic injection molding.
Implementation Method 1
a rail, a slide block, six rows of rollers, a plurality of retaining members for holding the rollers
Implementation Method 2
The turning members are set at both ends of the slide block and serve to turn the moving direction of the rollers
Data Source
AI summary
A linear roller guide unit comprises an elongated rail and a carrier straddling the rail. A plurality of rollers is installed between the carrier and the rail so that the carrier can slide along the elongated rail. By installing six rows of rollers within the existing standard cross section, the invention can achieve long life, high load capacity and high rigidity.