Valve Core Separable Fitting Sections Eliminate Caulking
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Solution Overview
Problem
Conventional valve cores require labor-intensive caulking processes to prevent separation, increasing manufacturing costs.
Innovation Solution
A valve core design featuring a first core cylinder body with a male screw, a second core cylinder body with an outer peripheral seal and a movable member, and separable fitting sections that eliminate the need for caulking, using a compression coil spring to maintain contact and prevent separation, allowing for detachable fitting without interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a caulking engagement portion is formed by caulking a part of the fitting section to prevent separation between the first core cylinder body and the second core cylinder body, then the reliability of preventing separation is improved, but the manufacturing cost increases due to labor required for the caulking work
Solution Approach 1:
The invention extracts and eliminates the caulking engagement portion from the fitting section, removing the need for labor-intensive caulking work. Instead, a separate engagement portion is provided on the second core cylinder body that engages with the first core cylinder body without requiring deformation or caulking of the fitting section, thereby reducing manufacturing cost while maintaining separation prevention reliability
Solution Approach 2:
The invention segments the engagement function from the fitting section by providing a dedicated engagement portion on the second core cylinder body. This separation allows the fitting section to serve purely its fitting purpose while the engagement portion handles the separation prevention function, eliminating the need for caulking on the fitting section and reducing manufacturing complexity
2Ease of manufacture
If the fitting sections are made separable without interfering with each other, then the ease of manufacture and assembly is improved, but the reliability of preventing separation may be worsened
Solution Approach 1:
The invention introduces an engagement portion as an intermediary mechanism between the first core cylinder body and the second core cylinder body. This engagement portion acts as a mediator that provides reliable separation prevention through dedicated engagement structures (such as grooves and protrusions) while allowing the fitting sections themselves to remain simple and separable for ease of assembly
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
Reduces manufacturing costs by eliminating the need for caulking and simplifying assembly, while maintaining effective sealing and operational functionality.
Implementation Method 1
an elastic member coming in contact with the movable member and the first core cylinder body and biasing so that the second core cylinder body is sandwiched between the first core cylinder body and the valve body
Data Source
AI summary
A valve core capable of suppressing manufacturing costs, including: a first core cylinder body, a second core cylinder body having a valve opening on an opposite side to the first, a movable member having a valve body which opens and closes the valve opening at the front end of a shaft section linearly movably extending through the insides of the core cylinder bodies, an elastic member in contact with the movable member and the first body and biasing to sandwich the second body between the first and valve body, and a pair of fitting sections including a first and a second fitting section on the core cylinder bodies and which are rotatably fitted and are separable from each other without interfering. The fitting sections have cylindrical shapes that are detachably fitted to each other, and the first section has a stepped surface with which the second section is in contact.