Liquid Pump PCB Alignment for Press-In Contact Assembly
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Solution Overview
Problem
The complexity and cost associated with aligning press-in contacts in liquid pumps, particularly due to tolerance chains, complicate the assembly process and increase manufacturing costs.
Innovation Solution
An alignment mechanism with guide openings and a guide element is introduced to directly align press-in contacts with press-in openings on the printed circuit board, simplifying the assembly process and reducing component positioning requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If press-in contacts are aligned indirectly via different components (carrier, housing, printed circuit board), then the assembly can be constructed with standard components, but the alignment precision deteriorates due to tolerance chains
Solution Approach 1:
The patent merges the alignment function directly into the printed circuit board by integrating a guide element (such as a guide pin or guide opening) into the board structure. This eliminates the need for separate alignment components and directly aligns the press-in contacts with their corresponding openings, thereby improving alignment precision without proportionally increasing assembly complexity.
2Manufacturing precision
If stringent position requirements are imposed on components in the housing to ensure alignment, then alignment precision improves, but the ease of manufacture deteriorates
Solution Approach 1:
The patent introduces a guide element as an intermediary component that mediates the alignment between the press-in contacts and the printed circuit board. This guide element absorbs the alignment requirements, allowing the main components to be manufactured with standard tolerances while still achieving precise alignment during assembly.
3Adaptability or versatility
If multiple components (carrier, stamped contacts, temperature sensor) are used to achieve the alignment function, then the design flexibility improves, but the device complexity increases
Solution Approach 1:
The patent combines multiple alignment-related functions into a single integrated guide element that is part of the printed circuit board structure. This reduces the total number of components while maintaining design flexibility, as the guide element can be designed in various configurations (guide pins, guide openings, recesses) to suit different assembly requirements.
Data Source
AI summary
A liquid pump having a housing, an electric motor formed by a stator assembly arranged in the housing and a rotor, a liquid duct, a printed circuit board and a temperature sensor assembly which is received in the housing and has a temperature sensor associated with the liquid duct, the stator assembly and/or the temperature sensor assembly having at least one press-in contact which engages into a press-in opening in the printed circuit board, an alignment mechanism is provided, by way of which the press-in contact may be directly aligned relative to the printed circuit board.