Motorcycle Plug Cover With O-Ring and Spring Retention
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Solution Overview
Problem
Existing plastic covers for motorcycle swingarm bolt heads are not securely retained and are prone to leakage, loosening, or loss during riding, failing to effectively protect against dirt, grime, and moisture.
Innovation Solution
A cup-shaped stainless steel plug cover with O-ring gaskets and stainless steel spring ball plungers is used to securely engage the recessed opening, providing a durable and decorative solution that resists dirt and moisture ingress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If plastic covers are used to cover the bolt head, then the material can be resiliently retained within the recessed opening, but the cover is not securely retained and is prone to leakage, loosening, or loss during riding
Solution Approach 1:
The invention uses a composite retention system combining metal springs (providing structural strength and elasticity) with rubber O-ring gaskets (providing sealing and friction). This composite approach overcomes the limitations of single-material plastic covers by integrating the advantages of different materials: metal provides secure mechanical retention while rubber provides sealing and enhanced friction grip on the swingarm surface.
Solution Approach 2:
The retention function is segmented into multiple independent components: metal springs provide the retaining force, O-ring gaskets provide sealing and additional friction, and the cup-shaped body provides structural support. This segmentation allows each component to specialize in its function, with the springs handling retention and O-rings handling sealing, thereby improving overall reliability.
2Ease of manufacture
If plastic covers are used to cover the bolt head, then the cover can be press fit engaged or use flexible legs, but the cover comes loose, falls off and becomes lost while riding
Solution Approach 1:
The invention replaces single-material plastic construction with a composite system of metal springs and rubber O-rings. The metal springs provide strong mechanical retention that resists loosening during riding, while the rubber O-rings provide sealing and enhanced friction. This composite approach maintains ease of manufacture through modular components while dramatically improving resistance to loosening and loss.
Solution Approach 2:
The cup-shaped body with curved exterior surface provides aerodynamic smoothness and prevents the cover from catching on surrounding components during riding. The curved geometry also allows for better distribution of retention forces across the O-ring gasket contact surface, enhancing the overall retention mechanism's reliability.
3Object-affected harmful factors
If plastic covers are used to cover the bolt head, then the cover can provide protection, but the cover leaks and does not effectively protect against dirt, grime, and moisture
Solution Approach 1:
The invention uses flexible rubber O-ring gaskets that conform to the recessed opening's geometry and the swingarm surface. These flexible sealing elements adapt to surface irregularities and provide reliable sealing against dirt, grime, and moisture. The rubber material's elasticity allows the O-ring to maintain sealing pressure even under vibration and thermal expansion/contraction conditions.
Solution Approach 2:
The combination of rigid metal cup body with flexible rubber O-ring gaskets creates a composite sealing system. The rigid body provides structural integrity and positioning, while the flexible rubber gaskets provide adaptive sealing. This composite approach overcomes the limitations of plastic covers by using materials specifically selected for their sealing properties.
Data Source
AI summary
A motorcycle plug cover having a cup-shaped body with a cylindrical wall and a continuous annular groove for receiving engagement with an O-ring gasket. The body has a curved external cap surface with an edge extending beyond the cylindrical wall and beyond an external surface of the rubber O-ring gasket when engaged within the continuous annular groove in the cylindrical wall. Spring openings are formed through the cylindrical wall arranged in pairs and on opposite sides of the cylindrical wall, each for receiving and engaging a spring ball plunger that is secured within a one of the spring openings. The cup-shaped body has a curved external cap surface supporting a decorative design.