Cab-Mounted Exhaust Pipe De-coupler With Ball Joints
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Solution Overview
Problem
Existing mounting systems for vertical exhaust pipes on large vehicles, such as heavy trucks, do not adequately accommodate the relative movement between the exhaust pipe and the cab body, limiting flexibility and potentially causing stress and vibration.
Innovation Solution
A de-coupler mechanism with ball joints allows limited vertical and horizontal movement of the exhaust pipe relative to the cab body, using cylindrical housings, stems, and connecting bars to provide flexibility while maintaining structural integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a rigid mounting system is used to securely attach the exhaust pipe to the cab body, then structural stability is improved, but the system cannot accommodate relative movement between the exhaust pipe and cab body, leading to increased stress and vibration
Solution Approach 1:
The mounting system transitions from a rigid static structure to a dynamic system with ball joints that enable controlled movement. The de-coupler mechanism with ball joints allows the exhaust pipe to move relative to the cab body while maintaining connection, accommodating thermal expansion and vibration-induced displacement.
Solution Approach 2:
The system changes the degree of freedom parameter by introducing ball joints that permit limited movement in specific directions. This allows the mounting system to adapt to varying operational conditions while maintaining structural integrity through controlled parameter variation.
2Strength
If a rigid mounting system is used to securely attach the exhaust pipe, then structural integrity is improved, but stress and vibration on the exhaust pipe and cab body increase
Solution Approach 1:
The de-coupler mechanism with ball joints acts as an intermediary element between the exhaust pipe and cab body. It mediates the connection by allowing controlled movement that reduces stress transmission and vibration generation while maintaining structural integrity of both components.
Solution Approach 2:
The dynamic ball joint mechanism absorbs and dissipates vibrational energy through controlled movement, reducing the transmission of harmful vibrations to the cab body while maintaining the structural strength of the mounting system.
3Adaptability or versatility
If limited movement capability is provided in the mounting system, then flexibility and vibration reduction are improved, but device complexity increases
Solution Approach 1:
The mounting system is segmented into discrete components including the de-coupler mechanism and ball joints. This segmentation allows for modular assembly and maintenance while providing the necessary movement capability through standardized mechanical elements.
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 de-coupler mechanism effectively absorbs movement and reduces stress on the exhaust pipe and cab body, enhancing durability and reducing vibration, thereby improving the overall mounting system's performance.
Implementation Method 1
A de-coupler has a first attachment point to the first member, a second attachment point to the second member, and a de-coupler mechanism comprising at least one ball joint which allows limited vertical and limited horizontal movement of the exhaust pipe relative to the cab body.
Data Source
AI summary
A motor vehicle in which a de-coupler has a first attachment point to a cab body, a second attachment point to a vertical engine exhaust pipe, and a de-coupler mechanism having at least one ball joint which allows limited vertical and limited horizontal movement of the engine exhaust pipe relative to the cab body.