Rolling Element Chain System for Linear Guideway
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Solution Overview
Problem
Conventional rolling element chains for linear guideways suffer from interference, uneven load distribution, and the risk of rolling elements falling off due to clearance issues and lack of radial freedom, leading to unsmooth operation and potential damage.
Innovation Solution
A rolling element chain system with a guiding groove and spacers that satisfy the relation C<t+B/π, where C is the groove width, t is the linking portion thickness, and B is the retaining capacity, ensuring even load distribution and preventing rolling elements from falling off while allowing radial freedom.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the chain ends are connected to eliminate clearance, then the chain stability is improved, but the chain loses radial freedom and causes interference with the return path
Solution Approach 1:
The chain is segmented into multiple link portions connected by articulation points, allowing each segment to move independently. This segmentation provides radial freedom at the articulation points while maintaining overall chain stability, preventing both clearance-induced sway and interference with the return path.
Solution Approach 2:
The chain employs dynamic articulation points that allow controlled radial movement. The articulation points enable the chain to adapt its configuration dynamically, providing radial freedom when needed while maintaining stability during operation, thus eliminating both clearance problems and interference issues.
2Stability of the object's composition
If the chain is made rigid to prevent sway, then the chain stability is improved, but the rolling elements cannot share load evenly
Solution Approach 1:
The chain is divided into multiple rigid link portions connected by articulation points. Each link portion maintains rigidity for stability, while the articulation points between them provide flexibility for load distribution. This segmentation allows the chain to remain stable while enabling smooth operation through even load sharing.
Solution Approach 2:
The chain structure changes the rigidity parameter spatially - rigid link portions provide stability while flexible articulation points provide adaptability. This parameter change allows the chain to maintain stability overall while enabling smooth operation through localized flexibility at connection points.
3Adaptability or versatility
If clearance is left between chain ends and rolling elements, then radial freedom is maintained, but rolling elements may fall off
Solution Approach 1:
The chain is segmented into link portions with articulation points that create controlled clearance zones. These segmented structures maintain radial freedom through articulation while the through holes in spacer portions provide positive retention for rolling elements, preventing fall-off while preserving adaptability.
Solution Approach 2:
Through holes in the spacer portions act as intermediary retention features. These holes allow the chain to maintain radial freedom through articulation while providing a mechanical barrier that prevents rolling elements from falling off, thus mediating between the conflicting requirements of freedom and retention.
4Ease of manufacture
If the chain structure is simplified to reduce complexity, then ease of manufacture is improved, but the ability to prevent interference and ensure even load distribution is reduced
Solution Approach 1:
The chain uses segmented link portions and spacers that can be manufactured separately using standard fabrication processes, maintaining ease of manufacture. The segmented design inherently provides the complexity needed for interference prevention and even load distribution through its modular articulation structure.
Solution Approach 2:
The link portions and spacers are designed as universal components that perform multiple functions: structural support, load distribution, and interference prevention. This multi-functionality allows the chain to achieve reliable operation without requiring overly complex specialized components, maintaining ease of manufacture.
Data Source
AI summary
A rolling element chain system for a linear guideway comprises a slide rail, a slide block, a plurality of rolling elements and a rolling element chain. The circulating path of the slide block is interiorly provided with a guiding groove with a width C, and the rolling elements roll within the circulating path and are confined by the rolling element chain. The rolling element chain has a plurality of spacers for separating the rolling elements from one another and linking portions with a thickness t for linking the rolling elements with one another. The spacer at each end of the rolling element chain has a retaining capacity B for holding the corresponding rolling element. The above structure satisfies the relation: C<t+B/π.