Self-Centering Fastening Screw for Poly-V Roller Assembly
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Solution Overview
Problem
Existing roller conveyors face challenges in efficiently and easily fastening rollers to a support frame, particularly when using poly-V belts, which require precise tensioning during assembly.
Innovation Solution
A fastening screw with a truncated circular cone section is used to create a positive rotationally fixed connection with a polygonal bore, allowing for easy assembly and increased tension on the poly-V belt by centering the screw within the bore, reducing component complexity and supporting a modular principle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a conventional fastening screw is used to secure rollers to a support frame, then the assembly process requires precise tensioning of poly-V belts, but this increases the tensioning effort and reduces assembly efficiency
Solution Approach 1:
The fastening screw automatically centers itself within the polygonal bore through the geometric interaction between the truncated circular cone section and the polygonal bore walls, eliminating the need for external centering tools or complex alignment procedures during assembly
Solution Approach 2:
The truncated circular cone section geometry transforms the fastening process by creating a self-centering mechanism that changes the positional parameters of the screw automatically during insertion, ensuring proper alignment without manual intervention
Data Source
AI summary
A fastening screw (2) comprisinga threaded shank (21) having an external thread,a screw head (23),characterized inthat a truncated circular cone section (22) is provided axially between the screw head (23)and the threaded shank (21).