Thermoplastic Resin Tank Joint Sealing With Press-Fit Metal Insert
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing fuel tank designs for vehicles made of thermoplastic resin lack a robust and reliable connection mechanism that ensures secure attachment of metal components, leading to potential leaks and structural integrity issues.
Innovation Solution
A tank design incorporating a thermoplastic resin tank body with a metal female screw member, a metal joint with a male screw portion and boss portion, and a seal member that contacts the boss portion and hole side surface when the male screw portion is screwed into the female screw hole, providing a secure and leak-resistant connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a metal female screw member is press-fitted into a thermoplastic resin connection port, then the connection strength is improved, but the resin may deform or the screw member may become loose after cooling
Solution Approach 1:
The patent performs the press-fitting of the metal female screw member into the thermoplastic resin connection port while the resin is still in a hot, pliable state before cooling. This preliminary action allows the resin to conform to the screw member and create a secure mechanical interlock that maintains stability after cooling, preventing both deformation and loosening.
2Reliability
If a seal member is added to ensure leak-proof connection, then the sealing reliability is improved, but the device complexity increases
Solution Approach 1:
The patent integrates the seal member into the connection structure by positioning it between the metal joint and the connection port, where it simultaneously provides sealing functionality while being structurally incorporated into the assembly. This merging approach ensures leak-proof connection without significantly increasing overall device complexity.
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
The proposed tank design achieves a secure and leak-resistant connection between the thermoplastic resin tank body and metal components, enhancing the structural integrity and durability of the fuel tank while preventing oil leakage.
Implementation Method 1
press-fitting the female screw member into the connection port so that the first outer side surface comes into contact with the hole side surface defining the through hole before the first member is cooled
Data Source
AI summary
A tank includes a tank body made of a thermoplastic resin, a female screw member and a joint that are made of metal, and a seal member. The tank body has a tubular connection port with a through hole, and an inner space communicating with the connection port. The joint has a male screw portion to be screwed into a female screw hole of the female screw member, a boss portion connected to the male screw portion, and a joint through hole passing through the male screw portion and the boss portion. The seal member is provided so as to contact the boss portion and the hole side surface when the male screw portion is screwed into the female screw hole. The boss portion is contactable with a first bearing surface of the female screw member.