Rotary Valve Seal Module Assembly With Split Passage Member
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Solution Overview
Problem
Conventional rotary valve devices face challenges in molding the passage member with a mold and assembling the seal module with high accuracy due to poor visibility and potential misalignment of components.
Innovation Solution
The rotary valve device incorporates a cylindrical holding member and a connector member that are molded products using the same material, facilitating easy assembly and ensuring high accuracy of the seal module by preventing misalignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the joint member is formed with a confluence passage portion that receives a part of the thermostat and communicates with the fail opening, then the assembly visibility is improved, but undercut occurs when molding with a mold and it is difficult to establish the mold
Solution Approach 1:
The passage member is divided into two separate components: a cylindrical holding member that fits into the fitting hole and holds the seal member and urging member, and a connector member that defines the main passage and is joined to the joining surface. This segmentation eliminates the undercut problem in molding while maintaining assembly visibility, as each component can be independently molded without complex mold requirements.
Solution Approach 2:
The cylindrical holding member is fitted into the fitting hole of the housing, and the connector member is joined to the joining surface. The holding member contains the seal member and urging member within its cylindrical structure. This nested arrangement allows for clear assembly visibility and accurate positioning without requiring complex integrated passages that would cause molding difficulties.
2Device complexity
If the seal mechanism is inserted in a state of poor visibility, then the device structure is simplified, but the already inserted members may be misaligned and the assembling work is complicated
Solution Approach 1:
The cylindrical holding member is designed to hold the seal member and urging member in a pre-assembled state before insertion into the housing. The holding member acts as a preliminary assembly fixture that maintains proper alignment and positioning of the seal components, ensuring high assembly accuracy while simplifying the overall assembly process by reducing the number of separate insertion steps.
3Productivity
If the joint member is assembled to receive the seal module, then the passage communication is established, but the assembling work is complicated due to misalignment of components
Solution Approach 1:
The cylindrical holding member serves as an intermediary component between the seal module and the housing. It provides a standardized interface that fits into the fitting hole, allowing the seal member and urging member to be assembled as a integrated unit without requiring complex alignment procedures. This intermediary structure simplifies the assembly process while ensuring proper connection and passage communication.
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
This configuration allows for easy molding of the passage member and simplifies the assembly process, enabling high-accuracy assembly of the seal module and ensuring reliable operation.
Implementation Method 1
an urging spring that urges the cylindrical seal member toward the outer peripheral wall
Data Source
AI summary
The rotary valve device includes a valve 30, a housing H having a joining surface 14b1 located at ends of a fitting hole 14a and a through hole 16, a thermostat 110 partially accommodated in the through hole 16, a cylindrical seal member 80, an urging spring 90, and a passage member 60. The passage member 60 includes a cylindrical holding member 61 that is fitted into the fitting hole 14a and holds the cylindrical seal member 80 and the urging spring 90, and a connector member 62. The connector member 62 includes an annular fitting recess 62a3 into which a part of the cylindrical holding member 61 is fitted, and a detour passage 62a4 that is divided from the fitting recess by a wall portion to partially accommodate the thermostat and bypasses the cylindrical seal member to communicate with the through hole.