Modular Linear Roller Bearing with Elastomeric Seals
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Solution Overview
Problem
Existing linear roller bearings face challenges in modularity, ease of assembly, and cost-effectiveness, as well as effective sealing and lubrication, particularly in accommodating misalignments and ensuring long-lasting lubrication.
Innovation Solution
A modular linear roller bearing system with snap-fit assembly, integrated lubricant reservoirs, and elastomeric seals that accommodate misalignments, ensuring reliable sealing and extended lubricant life, while being economical to produce and assemble.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If traditional linear roller bearings are designed as integrated units, then structural strength and stability are improved, but manufacturing cost and assembly complexity increase
Solution Approach 1:
The linear roller bearing is divided into separate modular components: a base element with guide rails, deflection elements at each end, and movable rollers. These segments can be manufactured independently using cost-effective processes and then assembled through snap-fit connections, reducing overall manufacturing complexity and cost while maintaining structural integrity through precise geometric interlocking.
2Ease of manufacture
If modular components are used for linear roller bearings, then ease of assembly and manufacturing economy are improved, but sealing reliability and precision may deteriorate
Solution Approach 1:
The deflection element serves multiple functions simultaneously: it guides the rollers through curved paths, provides snap-fit assembly connections to the base element, and integrates sealing surfaces for elastomeric seals. This merging of functions into a single modular component maintains sealing reliability while preserving ease of assembly and manufacturing economy.
3Ease of operation
If snap-fit assembly is used for modular components, then ease of assembly is improved, but manufacturing precision requirements increase
Solution Approach 1:
The snap-fit connection utilizes curved guide surfaces and rounded transition zones that naturally guide components into proper alignment during assembly. The curved geometry provides self-centering action that compensates for minor dimensional variations, reducing the stringency of manufacturing precision requirements while maintaining ease of assembly.
4Reliability
If elastomeric seals are integrated into modular components, then sealing capability is improved, but device complexity increases
Solution Approach 1:
The elastomeric seal is integrated directly into the deflection element, which already serves as a structural and guiding component. This merging eliminates the need for separate seal housings or additional sealing components, maintaining sealing capability while actually reducing overall device complexity compared to traditional multi-component sealing arrangements.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution provides a cost-effective, modular, and easily assembled linear roller bearing with enhanced sealing and lubrication capabilities, ensuring reliable operation even with misalignments and extending the service life of the lubricant.
Implementation Method 1
elastomeric seals that accommodate misalignments
Implementation Method 2
integrated lubricant reservoirs, and elastomeric seals that accommodate misalignments, ensuring reliable sealing and extended lubricant life
Data Source
Figure 1
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AI summary
The bearing has a hollow cylindrical base element (10) comprising linear guides (14) for loaded and unloaded rolling bodies. A ring-shaped deflection element (20) is made of plastic, and has a deflection guide between the linear guides. A ring-shaped cover (30) is made of plastic, and is formed at an axial end of the base element in a region of an outer sheath with an axial projection (11) such that the deflection element and the cover are successively arranged in a cavity of the projection. A sealing made of elastomer is arranged between the cover and deflection element.