Linear Guide Circulation Sleeve Positioning Mechanism
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Solution Overview
Problem
Existing linear guides face challenges in ensuring smooth roller circulation and operability due to inaccurate positioning of circulation sleeves and end caps, leading to increased complexity and cost in integration, as well as potential misalignment and stepped differences in molding, which hinder smooth roller movement and enhance the risk of burr formation.
Innovation Solution
The linear guide incorporates a slider main body with a circulation sleeve and an end cap featuring a curved direction changing passage, along with an inner peripheral track member, and includes positioning locking portions on the circulation sleeve and locked portions on the end cap and inner peripheral track member, allowing for accurate and firm positioning, even when the circulation sleeve is shifted by 180°, thus ensuring smooth roller circulation and improved operability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the circulation sleeve and end cap are positioned using traditional fitting methods (projected portions and chipped wall portions), then the integration can be completed, but the positioning accuracy is insufficient leading to potential misalignment and stepped differences
Solution Approach 1:
The positioning locking portions are divided into multiple segments (first and second positioning locking portions) that engage with corresponding locked portions at different locations. This segmentation allows for distributed positioning control, improving overall positioning accuracy while maintaining ease of integration through modular engagement.
Solution Approach 2:
The positioning locking portions are pre-formed on the circulation sleeve before integration with the end cap. This preliminary positioning feature ensures that when the circulation sleeve is inserted, the locked portions automatically engage at the correct positions, eliminating the need for complex alignment operations and preventing misalignment.
2Ease of manufacture
If the circulation sleeve is inserted into the slider main body without accurate positioning features, then the integration process is simple, but the phase matching between the circulation sleeve and end cap becomes difficult leading to increased integration time and cost
Solution Approach 1:
The positioning locking portions are pre-formed on the circulation sleeve before integration with the end cap. This preliminary positioning feature ensures that when the circulation sleeve is inserted, the locked portions automatically engage with the corresponding locked portions on the end cap, eliminating the need for complex alignment operations and reducing integration time.
Solution Approach 2:
The positioning locking portions and locked portions are designed to automatically engage with each other when the circulation sleeve is inserted into the slider main body. This self-positioning mechanism eliminates the need for external alignment tools or complex positioning procedures, allowing workers to simply insert the circulation sleeve and let the positioning features do the work automatically.
3Object-affected harmful factors
If traditional positioning methods are used, then the structure can be maintained, but stepped differences occur at the connection between the circulation sleeve and end cap causing burr formation and hindering smooth roller movement
Solution Approach 1:
The positioning locking portions are divided into multiple segments (first and second positioning locking portions) that engage with corresponding locked portions at different locations. This segmentation distributes the positioning function across multiple contact points, ensuring uniform support and eliminating stepped differences that would cause burr formation, while keeping each individual positioning feature simple in structure.
Data Source
AI summary
A slider has a slider main body which has a circulation sleeve whose inner portion forms a rolling element passage by being inserted into a hole penetrating in an axial direction, an end cap which has an outer peripheral track face of a direction changing passage in a curved shape for communicating a load track between two rolling element rolling grooves and the rolling element passage, and is fixed to an axial end portion of the slider main body, and an inner peripheral track member which has an inner peripheral track face of the direction changing passage, and is fitted to the end cap. An end portion of the circulation sleeve is provided with a plurality of positioning projected portions, and the end cap and the inner peripheral track member are provided with recess portions fitted with the positioning projected portions.