Multi-row Rolling Element Housing Band for Motion Guide Precision
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Solution Overview
Problem
The precision of motion guides using rolling elements is limited by the diameter of the rolling elements, and increasing the number of elements between a guide rail and a carriage can enhance precision but is constrained by manufacturing limitations.
Innovation Solution
A multi-row rolling element housing band with at least three rolling element rows, where each second and third rolling element is displaced in the length direction from the first, integrated into the circulation path of a motion guide apparatus, allowing for increased precision by reducing carriage waving.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the diameter of rolling elements is reduced and the number of rolling elements is increased, then guide precision is improved, but manufacturing difficulty increases
Solution Approach 1:
The invention transitions from a single row of rolling elements to multiple rows (two or more) arranged in the width direction. This dimensional change allows the system to achieve equivalent precision improvement without reducing individual rolling element diameter, thereby avoiding manufacturing difficulties while still increasing the effective number of rolling elements contributing to load support and precision
2Manufacturing precision
If rolling elements are arranged in multiple rows, then guide precision is improved, but device complexity increases
Solution Approach 1:
Multiple rows of rolling elements are merged into a single integrated housing band structure. The housing band simultaneously houses and connects all rolling element rows, eliminating the need for separate housing components for each row and reducing overall structural complexity despite the increased number of rolling elements
Solution Approach 2:
The housing band is segmented into multiple sections, each accommodating a row of rolling elements. This segmentation allows for modular assembly and maintenance while maintaining the precision benefits of multiple rolling element rows
Data Source
AI summary
A multi-row rolling element housing band is provided which can promote an increase in the degree of precision of a guide. At least three rolling element rows (17) to (19) are arranged in a band (15). Each second rolling element (18a) of the second rolling element row (18) is displaced by P/n in a length direction of the band (15) from each first rolling element (17a) of the first rolling element row (17). Each third rolling element (19a) of the third rolling element row (19) is displaced by P/n in the length direction of the band (15) from each second rolling element (18a) of the second rolling element row (18). P is the pitch between the first rolling elements (17a), and n is the number of rows.