Wheel Nut Arc Surface Design Prevents Deformation
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Solution Overview
Problem
Existing wheel nuts deform and become loose due to repeated disassembly and assembly, leading to potential safety risks and reduced service life.
Innovation Solution
A wheel nut design featuring an outward protruding arc surface with a radius larger than the nut body's circumscribed radius, a hexagonal cross-section, and chamfered connections, which increases the contact area with the sleeve, preventing deformation and looseness, and includes a nut cap for enhanced protection and cleanliness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the wheel nut uses a traditional flat surface design, then the structure is simple and easy to manufacture, but the contact area with the sleeve is small leading to deformation and looseness after repeated use
Solution Approach 1:
The patent applies curvature by replacing the traditional flat surface with an arc surface on the wheel nut's outer surface. This arc surface has a larger radius than the circumscribed radius of the nut body, creating a curved contact interface with the sleeve. The curved surface distributes contact stresses more evenly and increases the contact area, preventing deformation and loosening that occurs with flat surfaces during repeated assembly and disassembly operations.
2Adaptability or versatility
If the wheel nut is subjected to repeated disassembly and assembly, then the wheel can be replaced for maintenance, but the steel wheel nut cap deforms and becomes loose reducing service life
Solution Approach 1:
The arc surface design with radius larger than the circumscribed radius creates a curved contact interface that distributes mechanical stresses more uniformly during tightening and loosening operations. This curvature prevents stress concentration at flat surface edges, reducing cumulative deformation damage from repeated maintenance cycles and extending the wheel nut's service life while maintaining full reusability.
3Strength
If the wheel nut contact area with the sleeve is small, then the structure is compact, but the loading area is insufficient causing deformation under load
Solution Approach 1:
The arc surface geometry increases the effective contact area between the wheel nut and sleeve without significantly increasing the overall nut volume. The curved surface distributes the loading area more effectively, preventing localized deformation under load while maintaining a compact nut size suitable for standard wheel applications.
Data Source
AI summary
The utility model discloses a wheel nut, including a nut body which the outside surface comprises of multiple identical arc surfaces. The arc surface is protruding outward, and the radius of the arc surface is larger than the circumscribed radius of the outside surface of the nut body. The utility model designs the existing square surface of the outer hexagon feature of the wheel nut as an arc surface, which the contact area between the wheel nut and the sleeve and the loading area of the wheel nut can be increased, and then the deformation and looseness of the wheel nut can be avoided effectively, and therefore the service life of the wheel nut can be improved.