Integrated Fastening Bolt for Pump Assembly Noise and Rust Reduction
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Solution Overview
Problem
The existing pump apparatus suffers from noise emission due to resonating fastening bolts, increased complexity and number of fastening points leading to reduced productivity and work efficiency, and potential rust from inadequate painting coverage.
Innovation Solution
The pump apparatus is designed with a fastening mechanism that inserts through the valve unit, reducing the number of exposed fastening elements and eliminating noise, while positioning means ensure proper alignment and ease of assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate fastening bolts are used to fasten pump units to the valve unit, then the connection reliability is improved, but the number of fastening bolts increases to eight, leading to increased device complexity and reduced productivity
Solution Approach 1:
The patent combines the fastening function for both pump units into a single integrated fastening bolt structure. The fastening bolt passes through both pump units and the valve unit simultaneously, allowing one bolt to perform the fastening function that previously required eight separate bolts, thereby reducing device complexity while maintaining connection reliability
Solution Approach 2:
The single fastening bolt serves multiple functions: it fastens both pump units to the valve unit simultaneously, provides alignment positioning, and ensures secure mechanical connection. This multi-functional design replaces the need for multiple dedicated fastening elements, reducing overall system complexity
2Strength
If multiple fastening bolts are used to fasten pump units to the valve unit, then the connection strength is improved, but the number of processed portions such as screw holes increases, deteriorating the productivity of components
Solution Approach 1:
The patent merges multiple fastening operations into a single integrated fastening bolt structure that passes through both pump units and the valve unit. This consolidation reduces the number of processed portions (screw holes) from what would be required for eight separate bolts to a minimal set of holes, significantly improving component productivity while maintaining adequate connection strength
Solution Approach 2:
The fastening bolt is designed with segmented engagement portions that interact with different components (first pump unit, valve unit, second pump unit) at different locations. This segmentation allows a single bolt to provide distributed fastening points across multiple components, maintaining connection strength while reducing the total number of processed portions required
3Ease of operation
If the intermediate portion of the fastening bolt is exposed outside the pump casing, then the assembly simplicity is improved, but noise is emitted when the fastening bolt resonates and oscillates
Solution Approach 1:
The patent extracts the exposed intermediate portion of the fastening bolt from the external environment by routing it through the valve unit housing. This removes the resonating portion from exposure to external air, eliminating the noise source while maintaining the simple assembly structure, as the bolt still passes through components in a straightforward manner
4Strength
If the pump casing is externally partially covered by the fastening bolt, then the structural integrity is improved, but the covered portion may be painted insufficiently and therefore rust
Solution Approach 1:
The patent extracts the fastening bolt's intermediate portion from external exposure by routing it through the valve unit housing. This eliminates the problem of inadequate painting coverage on exposed bolt surfaces, preventing rust while maintaining the structural integrity provided by the fastening bolt, as the bolt remains securely positioned within the housing
Data Source
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AI summary
A pump apparatus which is expected to realize satisfactory work efficiency of an assembly operation, reduction of noise and suppression of rust comprises: two pump units (22 and 23); a valve unit (24) provided between the pump units (22 and 23); and a fastening means (36) for fastening the pump units (22 and 23) to each other such that the valve unit (24) is able to be held by the pump units (22 and 23) therebetween.