Filling Device Inner Part Radial Demolding
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Solution Overview
Problem
Existing filling devices for operating fluid tanks, particularly 'capless' designs, are complex and costly to produce due to the large number of components requiring assembly and ensuring fluidtightness.
Innovation Solution
A filling device with a tubular outer part and an inner part designed as a one-piece casting or plastic injection molding, featuring shell openings that allow demolding in a radial direction, reducing the number of components and enabling cost-effective production, along with spring-loaded closure flaps for fluid containment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a filling device is designed with multiple separate components to ensure fluidtightness and proper function, then the device can reliably contain and transfer operating fluid, but the production complexity and cost increase due to the large number of components requiring assembly
Solution Approach 1:
The patent merges multiple separate components (outer part, inner part, closure flap, spring elements) into an integrated assembly where the inner part is received within the outer part and the closure flap is mounted on the inner part. This consolidation reduces the number of discrete components that require separate production and assembly while maintaining fluidtightness through coordinated sealing surfaces and interfaces between the integrated parts.
Solution Approach 2:
The filling device employs a nested structure where the inner part is received inside the outer part, and the closure flap is mounted on the inner part. This nesting arrangement allows multiple functional elements to be housed within each other, reducing overall complexity and assembly requirements while ensuring proper spatial relationships for fluid containment and transfer operations.
2Ease of operation
If a filling device uses multiple separate components that must be assembled, then the device can achieve proper function, but the assembly process becomes complex and time-consuming
Solution Approach 1:
The filling device is segmented into distinct functional modules (outer part, inner part, closure flap assembly) that can be produced separately and then assembled. This segmentation allows for specialized production techniques for each component while maintaining overall assembly simplicity, as each module is designed to interface with others in a straightforward manner, reducing assembly complexity and improving production efficiency.
3Ease of manufacture
If the shell opening width corresponds substantially to the maximum inner width of the shell, then the inner part can be produced as a one-piece casting or injection molding, but the closure flap must be precisely positioned to maintain fluidtightness
Solution Approach 1:
The closure flap assembly incorporates localized sealing features at specific positions on the inner part, concentrating the fluidtightness function at critical interfaces rather than requiring uniform precision throughout the entire assembly. This allows the shell opening to be produced with standard tolerances for one-piece manufacturing while maintaining reliable sealing through specially designed local sealing surfaces and closure flap positioning features.
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
Simplifies production and reduces costs by minimizing components and assembly complexity while maintaining fluidtightness and operational reliability through a single-piece inner part and efficient sealing mechanisms.
Implementation Method 1
at least one closure flap which is urged, in particular under spring loading, into a closure position closing an opening
Data Source
Figure 1
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Figure 6~7
AI summary
A filling device for an operating fluid tank, comprising a tubular outer part 1 and an inner part 2 which is received in the outer part 1 and which is designed to receive an operating fluid nozzle, wherein the inner part 2 comprises a first end wall 8 having an opening and a second end wall 9 having an opening, the end walls (8,9) being connected to one another via a shell 7 and the shell 7 being provided over the entire length between the end walls with a shell opening (19,20) whose width corresponds substantially to the corresponding maximum inner width of the shell 7.