Muffler Heat Shield Mounting to Prevent Vibration Loosening
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Solution Overview
Problem
Existing work vehicles face issues with premature loosening of heat insulating covers due to vibration, which compromises their ability to securely cover exhaust mufflers over extended periods.
Innovation Solution
Incorporating an anti-vibration member to support the heat insulating cover adjacent to the vehicle body frame, reducing vibration transmission and ensuring the cover remains securely attached without looseness, even with potential frame deformations or manufacturing errors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the heat insulating cover is attached to the exhaust muffler, then the muffler is covered and heat insulation is achieved, but the cover loosens prematurely due to vibration
Solution Approach 1:
The patent introduces a bracket as an intermediary component between the heat insulating cover and the exhaust muffler. This bracket is bolted to the vehicle body frame rather than directly to the vibrating muffler, serving as a stable mounting platform that isolates the cover from vibration-induced loosening while maintaining effective heat insulation coverage.
2Shape
If the heat insulating cover is supported by the exhaust muffler, then the cover is positioned correctly, but vibration from the muffler causes premature loosening
Solution Approach 1:
The bracket acts as a mediator that decouples the heat insulating cover from the vibrating exhaust muffler. By mounting the bracket to the vehicle body frame instead of the muffler, the system maintains proper cover positioning while eliminating the harmful vibration transmission that causes loosening.
Solution Approach 2:
The patent extracts the mounting function from the exhaust muffler itself and relocates it to the vehicle body frame via the bracket. This separation allows the cover to maintain its positioning function while removing it from the source of vibration, thereby preventing premature loosening.
3Reliability
If the cover is designed to fully enclose the exhaust muffler, then complete coverage is achieved, but the cover shape becomes complex and costly
Solution Approach 1:
Instead of designing a complex cover that fully encloses the exhaust muffler, the patent applies heat insulation locally where it is most needed. The cover is designed to extend only to the vehicle body frame, providing adequate heat protection in critical areas while avoiding unnecessary structural complexity and cost.
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 anti-vibration member effectively supports the heat insulating cover, preventing looseness and ensuring long-term secure attachment, while allowing for a simple and cost-effective design with reduced stress on the cover.
Implementation Method 1
an anti-vibration member provided in a region of the muffler heat insulating cover adjacent the vehicle body frame, the muffler heat insulating cover being supported by the vehicle body frame via the anti-vibration member
Data Source
AI summary
Disclosed is a work vehicle having a load carrier deck provided at a rear portion of a vehicle body to be vertically pivotable between an elevated discharging posture and a lowered load carrying posture. An engine section is provided under the load carrier deck. The engine section includes an engine, an exhaust muffler for the engine, and a muffler heat insulating cover for covering an outer circumference of the exhaust muffler. The muffler heat insulating cover is supported by a vehicle body frame via an anti-vibration member.