Fuel Pump Reservoir Cup Latching for Vibration-Isolated Mounting
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Solution Overview
Problem
Conventional methods for mounting fuel pumps in vehicles fail to balance mountability and vibration attenuation, leading to inferior installation and vibration transfer.
Innovation Solution
A fixation apparatus featuring latching protrusions and fixing members that restrict movement in specific axes, combined with guide members and a stopper to securely attach the fuel pump to the fuel tank, enhancing assembly convenience and vibration attenuation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the fuel pump is mounted using conventional elastic mounts and fastening means from the top, then the fuel pump can be installed, but both mountability and vibration transfer attenuation are inferior
Solution Approach 1:
The fixation apparatus is divided into multiple functional components: a base fixed to the fuel tank, a reservoir cup for the fuel pump, latching protrusions for vertical restriction, and fixing members for transverse restriction. This segmentation allows each component to address specific requirements - the base provides structural support and vibration attenuation, while the latching and fixing mechanisms provide precise positional control and easy assembly.
Solution Approach 2:
The base acts as an intermediary element between the fuel tank and the reservoir cup. It provides a stable mounting surface, attenuates vibrations before they reach the fuel pump, and incorporates guide members and latching structures that facilitate easy assembly. This intermediary structure resolves the contradiction by decoupling the vibration attenuation function from the mounting function.
2Reliability
If the fuel pump is firmly mounted to ensure stability, then vibration attenuation improves, but assembly complexity increases
Solution Approach 1:
The latching protrusions are designed to automatically engage with the base when the reservoir cup is positioned correctly. The guide members on the base automatically align the reservoir cup during assembly, and the fixing members can be simply inserted to engage with ribs on the reservoir cup. This self-aligning and self-latching mechanism achieves firm mounting without complex assembly procedures.
Solution Approach 2:
Different parts of the fixation apparatus have specialized local features: the base has guide members for alignment, latching grooves for vertical restriction, and fixing grooves for transverse restriction. The reservoir cup has corresponding latching protrusions and ribs. These localized features work together to provide firm mounting through simple, intuitive assembly actions rather than complex procedures.
3Manufacturing precision
If multiple restriction mechanisms are added to improve positioning accuracy, then mounting precision improves, but device complexity increases
Solution Approach 1:
The fixation apparatus merges multiple positioning functions into an integrated structure. The base combines guide members for vertical guidance, latching grooves for vertical restriction, and fixing grooves for transverse restriction into a single component. The reservoir cup similarly integrates latching protrusions and ribs. This merging achieves high positioning accuracy through coordinated action of unified structures rather than multiple separate complex mechanisms.
Data Source
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AI summary
A fixation apparatus of fuel pump according to an embodiment of the present invention may include a base coupled to a fuel tank and having a first latching groove formed at one side thereof; a reservoir cup having a first latching protrusion on one side, that is moved in an vertical direction to be seated on the base, and is moved in a transverse direction to be inserted in the first latching groove; and a fixing member installed in the reservoir cup so as to be movable in the vertical direction, wherein while the first latching protrusion is inserted in the first latching groove, the fixing member is moved in the vertical direction to fix the base and the reservoir cup.