Refrigerator Door Hinge Pin Geometry for Axial Stability
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Solution Overview
Problem
Existing refrigerating appliance door hinges face challenges in providing axial stability and correct axis alignment while allowing radial rotation, which affects the durability and aesthetics of the appliance.
Innovation Solution
A door hinge mechanism featuring a deformed pin with a larger diameter in the axial middle region, integrated with a hinge bracket, allowing for axial positioning and axis alignment, and assembled through mechanical interference or welding for stability, with optional screw connection and axial gap for flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a simple cylindrical pin is used in the door hinge, then the manufacturing is simple, but the axial stability and axis alignment are insufficient
Solution Approach 1:
The pin features a deformed middle section with enlarged diameter specifically at the axial center, while the end sections remain cylindrical with smaller diameter. This local variation in geometry provides precise axial positioning and alignment functionality without requiring the entire pin to be complex, thus resolving the contradiction between positioning precision and structural simplicity.
2Stability of the object's composition
If the pin diameter is uniformly large throughout, then axial stability is improved, but the ease of assembly and manufacturing complexity increase
Solution Approach 1:
The pin design applies local quality by having a larger diameter only in the middle section where axial stability is needed, while the end sections have smaller diameter for easier assembly and insertion into the hinge bracket. This localized approach to diameter variation achieves axial stability without compromising manufacturing ease.
3Manufacturing precision
If a deformed pin with larger middle diameter is used, then axial positioning and alignment are improved, but the manufacturing complexity increases
Solution Approach 1:
The deformed pin geometry with enlarged middle section provides precise axis alignment functionality only where needed, rather than requiring complex features throughout the entire pin structure. The simple cylindrical end sections maintain ease of manufacturing while the localized deformation achieves the alignment precision requirement.
Data Source
AI summary
Household appliance (2), especially refrigerating appliance, comprising a casing (4) with a door hinge (100), whereby said door hinge (100) comprises a hinge bracket (142) and a pin (148) which is inserted into a corresponding hinge seat (162) provided on said hinge bracket (142), whereby said pin (148) comprises an essentially cylindrical part (154) with two ends (170, 172) and a deformed part (158) arranged in between said two ends (170, 172) with a diameter larger than the diameter of said cylindrical main part (154).