Linear Guideway Linking Portion Fatigue Prevention
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional linear guideways experience unsmooth circulation of rolling element chains due to interference between the linking portion and guiding grooves, leading to bending deformation and potential fatigue fracture, especially when the slide block moves vertically.
Innovation Solution
The design incorporates a closed guiding groove system with constant width, where the third guiding grooves are positioned to align with the center line of the linking portion's path, avoiding interference and ensuring smooth circulation by determining the guiding groove dimensions based on trigonometric relations and similar triangle principles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the width of the inner side of the guiding groove is enlarged to provide deviation space for the linking portion, then the circulation smoothness is improved, but the linking portion is likely to bend badly and accelerate fatigue fracture
Solution Approach 1:
The patent applies parameter changes by precisely controlling the width of the guiding groove to match the width of the linking portion, rather than enlarging it. This optimal parameter setting allows the linking portion to follow the groove centerline during circulation, preventing both interference and excessive bending, thus resolving the contradiction between circulation smoothness and fatigue resistance
Solution Approach 2:
The patent implements preliminary action by pre-designing the guiding groove width based on the linking portion dimensions before assembly. The groove width is calculated and set in advance to be equal to the linking portion width, ensuring proper alignment and preventing deviation during operation, which avoids both interference and excessive bending
2Ease of operation
If the guiding groove is too large to accommodate the linking portion deviation, then the linking portion can circulate freely, but more freedom is provided causing the linking portion to bend badly during vertical movement
Solution Approach 1:
The patent changes the parameter of guiding groove width from being larger than the linking portion to being equal to the linking portion width. This precise parameter matching constrains the linking portion to follow the groove centerline, providing necessary guidance without excessive freedom that would cause bending during vertical movement
Solution Approach 2:
The patent segments the circulation path into controlled sections defined by the guiding groove, which divides the movement space into precise boundaries. This segmentation ensures the linking portion follows a predetermined safe path rather than having uncontrolled freedom of movement
Data Source
AI summary
A circulating structure for a linear guideway is arranged in a circulating assembly the linear guideway. The linear guideway includes two circulating assemblies, and each circulating assembly is provided with a circulating channel. Each circulating channel is provided with a third guiding groove. A rolling element system is arranged in the circulating channel and consists of plural rolling elements and a rolling element chain. The rolling element chain includes plural spacers and a linking portion located at both sides of the plural spacers to link them with one another. The linking portion circulates along the center line of the third guiding groove, and the third guiding grooves have a constant width.