Integrated Reed Valve Retainer for Tool-Less Cage Assembly
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Solution Overview
Problem
The existing reed valve assemblies for 2-stroke and 4-stroke motors require multiple parts and complex assembly processes, leading to increased manufacturing costs and potential errors due to the use of separate inserts to secure reed petals and cages, which complicates the assembly and increases labor time.
Innovation Solution
A reed valve assembly design that integrates a center retainer within the retainer to secure reed cages and petals without additional inserts, allowing for tool-less assembly by inserting the reed cages and petals through the bottom of the retainer, reducing the number of components and simplifying the assembly process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate inserts are used to secure reed petals and cages, then the reed valve assembly achieves reliable securing, but the assembly process becomes complex and labor-intensive
Solution Approach 1:
The patent combines the securing function previously performed by separate inserts into the retainer structure itself. The retainer now includes integrated securing features (such as recesses, slots, or engagement structures) that directly secure the reed petals and cages without requiring additional insert components, thereby reducing assembly complexity while maintaining securing reliability.
Solution Approach 2:
The patent removes the separate inserts from the assembly, extracting this component entirely. The securing function that was previously performed by inserts is now incorporated directly into the retainer design, eliminating the need for additional parts and simplifying the overall assembly process.
2Reliability
If multiple separate components (inserts, reed petals, cages) are used, then the reed valve assembly achieves proper function, but the number of assembly steps increases
Solution Approach 1:
The patent merges multiple assembly operations into a single integrated process. The retainer is designed to secure both reed petals and cages simultaneously through its integrated structures, allowing these components to be assembled together in one operation rather than requiring separate securing steps for each component.
Solution Approach 2:
The retainer is pre-designed with integrated securing features (recesses, slots, engagement structures) that are prepared in advance to receive and secure the reed petals and cages. This preliminary configuration of the retainer enables faster assembly by eliminating the need for additional securing operations during the assembly process.
3Strength
If separate inserts are used to secure reed components, then the reed petals remain firmly attached, but manufacturing costs increase
Solution Approach 1:
The patent combines the securing function into the retainer structure, eliminating the need for separate insert components. This reduction in part count directly lowers manufacturing costs by reducing material requirements, assembly operations, and quality control steps while maintaining attachment strength through the integrated securing features.
Solution Approach 2:
By removing the separate inserts from the design, the patent reduces the total number of components that need to be manufactured, inventoried, and assembled. This extraction of unnecessary components directly reduces manufacturing complexity and cost while the integrated retainer design maintains the necessary attachment strength.
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
This design reduces the number of assembly steps, decreases manufacturing costs, and minimizes errors by eliminating the need for separate inserts, facilitating a more efficient and cost-effective production process.
Implementation Method 1
Operation of the engine (e.g., movement of the piston within the cylinder) causes a change in the intake pressures. For example, as the piston moves a first direction, a pressure differential is created across the reed valve that causes the reed valve to open and allow the fuel-air mixture to flow into the cylinder.
Implementation Method 2
As the piston moves in the opposite direction, the resulting pressure change causes the reed valve to close and generally prevent the flow of air/fuel into the cylinder.
Implementation Method 3
The insert 7 applies a compressive force that sandwiches the inner reed petals 16a against the reed cage 14, thereby ensuring that the tabs 13 remain within the holes 15 of the inner reed valves 16b and preventing the inner reed petals 16a from becoming loose.
Data Source
AI summary
A reed valve assembly includes a retainer, one or more reed cages, and a plurality of reed petals. The retainer includes a flange, first and second openings, and a center retainer separating the first and second openings. The reed cages are configured to be advanced from the bottom of the retainer and partially through the first and second openings of the retainer and have at least two inner openings generally facing each other and at least two outer openings generally facing away from each other. The inner and outer openings are configured to be fluidly coupled to the first and second openings of the retainer. The reed petals are configured to extend over the inner openings and the outer openings. The center retainer and reed cages include one or more reed cage grooves and reed cage flanges configured secure the reed cages to the retainer.