Fuel Nozzle Thread Alignment via Angular Positioning Elements
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Solution Overview
Problem
Existing dispensing valves require the use of a torque wrench to ensure a strong thread connection between the attachment and the component receiving member, which complicates the assembly process and can lead to incorrect axial pressing force adjustments due to component tolerances.
Innovation Solution
The integration of angular positioning elements on the component receiving member and the attachment allows for precise axial alignment of the threads before connection, enabling a defined thread engagement through controlled rotation, thus eliminating the need for a torque wrench and simplifying the assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a torque wrench is used to produce the thread connection, then the thread connection strength is ensured, but the assembly process becomes more complex and time-consuming
Solution Approach 1:
The angular positioning elements are pre-configured on the attachment and component receiving member to automatically align the threads before engagement. This preliminary positioning action eliminates the need for torque wrenches and complex alignment procedures, allowing the thread connection to be made simply by axial approach followed by rotation.
2Force
If a torque wrench is used to adjust the axial pressing force, then the pressing force can be controlled, but the assembly process becomes more complex
Solution Approach 1:
The angular positioning elements enable the attachment to self-align and self-position during assembly. The system automatically determines the correct angular position through the geometric interaction of the positioning elements, eliminating the need for external torque wrenches or complex force adjustment mechanisms.
3Ease of manufacture
If the outer thread is rotated relative to the inner thread to produce thread engagement, then the thread connection is formed, but the axial position adjustment becomes difficult to control
Solution Approach 1:
The angular positioning elements perform the preliminary action of aligning the threads at the correct angular position before the rotation begins. This ensures that when the outer thread is rotated relative to the inner thread, the axial position adjustment follows a precise and controlled path, eliminating positioning difficulties.
4Ease of operation
If angular positioning elements are added to enable controlled axial approach, then the thread connection process is simplified, but the device structure becomes more complex
Solution Approach 1:
The angular positioning function is segmented into separate elements (protrusions on the attachment, recesses on the component receiving member) that can be independently manufactured and assembled. This segmentation allows the positioning function to be added without requiring a complete redesign of the entire thread connection system.
Data Source
AI summary
The present invention relates to a dispensing valve for dispensing a fluid, having a housing (13), a main channel (14) which extends therein for the fluid, a main valve which is arranged in the main channel (14) for controlling a fluid throughflow through the dispensing valve, a control device (15) for activating the main valve (20), a component receiving member (16, 16′) which is connected to the housing (13) and which is provided with an inner thread and having an attachment (17, 17′) which is provided with an outer thread, wherein between the inner thread and the outer thread, a thread connection is produced and wherein an axial position of the attachment (17, 17′) can be adjusted by the inner thread being rotated relative to the outer thread. According to the invention the component receiving member (16, 16′) and the attachment (17, 17′) have angular positioning elements (21, 22) which cooperate and which are configured prior to the thread connection being produced to enable an axial approach of a beginning of the thread of the outer thread to a thread entrance of the inner thread in at least one predetermined relative angular position between the inner thread and the outer thread and to prevent this in those angular positions which are different from the at least one relative angular position. As a result of the angular positioning elements, the screwing-in operation can be significantly simplified and an axial adjustment path can be adjusted in a significantly more precise manner.