Linear Motion Guide Lubricating Structure for Uniform Ball Bearing Distribution
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Solution Overview
Problem
Conventional linear motion guide devices face issues with uniform lubrication, as lubricant often leaks through gaps and fails to reach all necessary areas, leading to inadequate lubrication of the ball bearing device.
Innovation Solution
The design incorporates a guide rail with longitudinal recesses and a slider with aligned depressions and grooves, along with end caps that form endless ball guiding raceways, allowing for uniform lubrication through strategically placed passageways and channels, ensuring the lubricant effectively reaches and retains within the ball bearing device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If lubricant is supplied into the endless ball guiding raceway with higher pressure, then the lubrication effect is improved, but the lubricant leaks through the gaps between parts
Solution Approach 1:
The lubricating structure is segmented into multiple independent channels: a first channel supplies lubricant to the ball guiding raceway, while a second channel supplies lubricant to the slider. This segmentation allows controlled lubrication distribution without cross-leakage, resolving the contradiction between achieving adequate lubrication and preventing lubricant loss through gaps.
Solution Approach 2:
The patent introduces an intermediary lubricating structure with separate channels that acts as a mediator between the lubricant source and the moving parts. This intermediary structure controls lubricant flow through dedicated passages, ensuring lubrication reaches both the ball guiding raceway and slider without leaking through gaps between components.
2Reliability
If lubricant is supplied with higher pressure to ensure adequate lubrication, then the lubrication coverage is improved, but the lubricant cannot be uniformly distributed to various portions
Solution Approach 1:
The lubrication system is divided into multiple segmented channels that independently deliver lubricant to different locations. The first channel targets the ball guiding raceway while the second channel targets the slider, ensuring uniform distribution to various portions without requiring excessive pressure that would cause non-uniform flow patterns.
Solution Approach 2:
Each channel is designed with specific local characteristics tailored to its target component. The channels have optimized geometries and flow paths that match the lubrication requirements of specific portions, enabling uniform lubrication distribution across different locations with different operational demands.
3Device complexity
If a simple lubricating structure is used, then the device complexity is reduced, but the lubricant cannot reach all necessary areas
Solution Approach 1:
The lubricating structure is designed as a multi-functional integrated component that simultaneously serves multiple lubrication needs. The single lubricating structure with its multiple channels performs the function of lubricating both the ball guiding raceway and the slider, achieving comprehensive lubrication coverage without requiring multiple separate lubrication systems.
Data Source
AI summary
A linear motion guide device includes a slider slidably attached onto a guide rail, the guide rail includes a number of recesses and the slider includes a number of depressions aligned with the recesses of the guide rail for forming a number of ball rolling passages, the slider includes a number of grooves offset from the depressions, two end caps attached onto the slider and each include a number of passageways communicating with the grooves of the slider and the ball rolling passages for forming a number of endless ball guiding raceways between the slider and the guide rail and the end caps and for slidably receiving and engaging with the ball bearing device.