Outrigger Stiffness via Reinforcement Flange and Bracket
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Solution Overview
Problem
Conventional body-on-frame vehicles experience excess interior cabin noise due to gear noise from the differential, which generates resonant frequencies that travel through the vehicle frame and into the cabin, necessitating a solution to reduce vibration at the outrigger to decrease noise levels.
Innovation Solution
An outrigger is designed with a reinforcement flange extending along its side walls and a reinforcement bracket coupled to the interior edges of these walls, increasing stiffness and rigidity to absorb higher vibrations from the rear differential, thereby reducing noise transmission into the cabin.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the outrigger uses conventional design, then the device complexity is low, but the vibration absorption capability is insufficient leading to high interior cabin noise
Solution Approach 1:
The outrigger is divided into multiple functional segments: base wall, side walls, reinforcement flange, and reinforcement bracket. Each segment performs a specific function in the vibration absorption system, allowing the complex vibration reduction task to be distributed across multiple simpler components.
Solution Approach 2:
The outrigger employs a composite structural design combining the base wall, side walls, reinforcement flange, and reinforcement bracket to create a multi-component system that collectively provides superior vibration absorption compared to conventional single-structure designs.
2Strength
If reinforcement elements are added to the outrigger, then the vibration absorption capability increases, but the manufacturing complexity increases
Solution Approach 1:
The reinforcement flange and reinforcement bracket are integrated with the base wall and side walls to form a unified outrigger assembly. This merging of components creates enhanced vibration absorption capability while maintaining manufacturing efficiency through integrated design.
3Stability of the object's composition
If the outrigger stiffness is increased, then the resonance vibration absorption improves, but the device complexity increases
Solution Approach 1:
Reinforcement is applied locally at critical positions where vibrations are most severe. The reinforcement flange and reinforcement bracket are strategically positioned to provide targeted stiffness enhancement at the base wall and side walls connection points, rather than uniformly increasing complexity throughout the entire structure.
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 enhanced outrigger effectively absorbs resonance vibrations from the differential, significantly reducing audible noise within the vehicle cabin, improving operator and passenger comfort.
Implementation Method 1
absorb higher vibrations from the rear differential
Implementation Method 2
gear noise generates resonant frequencies which travel through a frame of the vehicle
Data Source
AI summary
An outrigger coupled to a cab frame. The outrigger including a base wall, a first side wall, an opposite second side wall, a reinforcement flange, and a reinforcement bracket. The first side wall and the opposite second side wall extend from the base wall. Each of the first side wall and the second side wall include an interior edge, an opposite exterior edge, and an inner surface. The reinforcement flange extends along the exterior edge of the first side wall, the second edge, and the exterior edge of the second side wall. The reinforcement bracket is coupled to the interior edge of the first side wall and the interior edge of the second side wall.