Plastic Metering Housing with Threadless Connections
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Solution Overview
Problem
Conventional devices for metered dispensing of media, such as lubrication systems, face challenges in reducing manufacturing costs and weight while maintaining precision, often requiring complex processing steps and resulting in high weight, which is undesirable for mobile applications seeking CO2 reductions.
Innovation Solution
A housing and metering device made from plastic with a non-threaded, metal-free design that simplifies manufacturing and reduces weight, featuring a plastic-oriented construction with a metering principle that eliminates the need for threads and post-processing, allowing for easier assembly and connection via clamp or plug connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional die-casting materials or extruded profiles are used for metering devices, then manufacturing precision and reliability are maintained, but manufacturing complexity and cost increase significantly
Solution Approach 1:
The patent changes the material parameter from metal (die-casting or extruded profiles) to plastic, which fundamentally alters the manufacturing process. Plastic components can be produced via injection molding, eliminating the need for precision machining and thread cutting, thus reducing manufacturing complexity while maintaining the required metering precision through integrated design features.
Solution Approach 2:
The patent replaces mechanical fastening systems (threads, screws, and bolts) with a snap-fit or insertion-based mounting system. The metering device is designed to be inserted directly into the housing without requiring threaded connections, thereby eliminating complex machining operations and reducing the number of manufacturing steps.
2Strength
If conventional metal materials are used for metering devices, then structural strength is ensured, but device weight increases
Solution Approach 1:
The patent employs plastic as a composite or alternative material to traditional metals. Modern engineering plastics provide sufficient structural strength for metering applications while being significantly lighter than metal materials, thus reducing the overall weight of the housing and metering device assembly.
Solution Approach 2:
The patent changes the material parameter from metal to plastic, which inherently reduces density and weight. The design compensates for any potential strength deficits through optimized geometric features and integrated reinforcement structures within the plastic components.
3Manufacturing precision
If precision machining and thread cutting are performed on metal components, then manufacturing precision is achieved, but manufacturing cost and processing time increase
Solution Approach 1:
The patent incorporates mounting features and connection elements directly into the plastic components during the injection molding process itself. This preliminary integration of features that would otherwise require separate machining operations eliminates subsequent processing steps, thereby improving manufacturing efficiency while maintaining precision through the molding process capabilities.
Solution Approach 2:
The patent replaces mechanical machining operations (thread cutting, drilling, tapping) with a molding-based manufacturing approach. Plastic components are formed with integrated threads, mounting holes, and connection features directly during injection molding, eliminating the need for downstream CNC machining and significantly improving productivity.
4Reliability
If metal components with threads are used, then connection reliability is ensured, but assembly complexity and cleaning requirements increase
Solution Approach 1:
The patent replaces threaded mechanical connections with a simplified insertion or snap-fit mounting system. The metering device is designed to be directly inserted into the housing with integrated positioning and sealing features, eliminating the need for separate fasteners and reducing assembly complexity while maintaining connection reliability through precise geometric fit.
Solution Approach 2:
The patent merges multiple functions (mounting, sealing, positioning) into a single integrated plastic component design. The housing and metering device are designed as complementary parts that combine to form a sealed assembly without requiring separate gaskets or fasteners, thereby simplifying assembly while ensuring reliable connections.
Data Source
AI summary
A housing for a device for metered dispensing of a medium, the housing including at least one inlet, preferably threadless, configured to allow the medium to enter the housing from a reservoir, a plurality of receptacles, preferably threadless, a metering device in each of the plurality of receptacles, an inlet line connected to the at least one inlet, and a plurality of distribution lines connected to the inlet line and to each of the plurality of receptacles, wherein the housing includes a plastic material.