Air Dryer Cartridge Thread Offset for Faster Vehicle Assembly
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Solution Overview
Problem
The existing air treatment cartridges for vehicles, especially utility vehicles, face challenges in efficient assembly processes, user-friendliness, and adaptability to different applications due to the use of single-start screw threads, which can lead to incorrect cartridge selection and increased assembly time.
Innovation Solution
An air treatment cartridge with a multi-start screw thread is introduced, featuring a cartridge body with a connecting portion that includes a leading end, a trailing end, and a multi-start screw thread. Each start of the thread is offset, allowing for easier positioning and thread alignment during assembly, and ensuring compatibility with a correspondingly formed multi-start screw thread on the air treatment device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single-start screw thread is used for connecting the air treatment cartridge to the air treatment device, then compatibility and simple combination of different types of connection elements are secured, but the assembly process becomes time-consuming and difficult due to positioning and thread alignment issues
Solution Approach 1:
The screw thread is segmented into multiple starts (e.g., two-start, three-start), creating multiple parallel thread paths. This segmentation allows the cartridge to be positioned more easily during assembly, as any of the multiple thread starts can engage with the corresponding threads on the air treatment device, reducing the time needed for precise alignment while maintaining compatibility.
Solution Approach 2:
The invention transitions from a single-start thread (one-dimensional engagement) to a multi-start thread (multiple parallel engagement paths). This dimensional change in the thread structure provides multiple alignment options simultaneously, allowing the cartridge to be connected more quickly without sacrificing the compatibility advantage of standardized thread forms.
2Ease of manufacture
If a single-start screw thread is used, then standardized connection is achieved, but the process of finding the start of thread and positioning the cartridge during assembly becomes difficult
Solution Approach 1:
By dividing the screw thread into multiple starts, the invention creates multiple entry points for thread engagement. This segmentation makes it easier for operators to find and align the thread starts during assembly, as there are multiple opportunities for successful engagement rather than a single critical alignment point, while still maintaining standardized connection characteristics.
Solution Approach 2:
The multi-start screw thread structure enables self-alignment during the assembly process. As the cartridge is approached toward the air treatment device, the multiple thread starts provide inherent guidance and multiple potential engagement points, allowing the components to self-position more easily without requiring precise pre-alignment by the operator.
3Adaptability or versatility
If different types of cartridges are provided for different applications, then adaptability to various pressure levels and uses is improved, but it is not secured that the right type of cartridge is assembled for the right application
Solution Approach 1:
The invention employs asymmetric thread profiles (such as buttress threads with different flank angles on each side) that are optimized for specific pressure directions and applications. This asymmetry creates mechanical compatibility only for the correct cartridge type with the corresponding air treatment device, preventing incorrect assemblies while maintaining adaptability across different applications through standardized multi-start thread forms.
Data Source
AI summary
An air treatment cartridge, especially an air dryer cartridge, for an air treatment device for a vehicle, especially a utility vehicle, includes: a cartridge body having a connecting portion for connecting the air treatment cartridge to the air treatment device, the connecting portion being formed on the cartridge body and having a leading end, a trailing end opposite to the leading end, and a multi-start screw thread formed between the leading end and the trailing end. Each start of thread of the multi-start screw thread is offset to one another on the leading end and/or the trailing end.