Work Vehicle Bracket Weight Member Vibration Reduction
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Solution Overview
Problem
Conventional work vehicles face issues with increased vibration and noise in the cabin due to inadvertent alignment of the natural frequency of the bracket with the space resonance frequency of the cabin or engine vibrational frequency, leading to insufficient reduction of vibration transmission on the lower frequency side.
Innovation Solution
A work vehicle design where the weight member is attached to a position on the outer vehicle body side of the bracket, extending its distance from the vehicle body frame, thereby reducing the natural frequency of the bracket and minimizing vibration transmission to the cabin, while optimizing the attaching portion and contacting area for reduced labor and cost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If the weight member is attached closer to the vehicle body frame, then the natural frequency of the bracket increases, but vibration transmission on the lower frequency side cannot be reduced sufficiently
Solution Approach 1:
The patent extends the bracket in the lateral direction (vehicle body outer side) to increase the distance from the vehicle body frame to the weight member. This dimensional change allows the natural frequency to be reduced without increasing weight, as the longer lever arm provides greater rotational inertia. The bracket extends laterally beyond the anti-vibration member attachment position, creating a longer moment arm for vibration reduction.
2Device complexity
If the natural frequency of the bracket is aligned with cabin resonance frequency or engine vibrational frequency, then the structure is simpler, but vibration and noise in the cabin increase
Solution Approach 1:
The patent changes the natural frequency parameter of the bracket by modifying its structure - specifically by extending it laterally and positioning the weight member at the extended end. This parameter change ensures the natural frequency does not coincide with cabin resonance frequency or engine vibrational frequency, thereby avoiding resonance amplification while maintaining structural simplicity.
3Stability of the object's composition
If the weight member is attached with large contacting area, then the attachment is more stable, but manufacturing precision and labor costs increase
Solution Approach 1:
The patent applies local quality by providing a localized protruding portion on the weight member that contacts the attaching face, rather than requiring the entire attaching face to be precisely machined. The protruding portion is positioned at a specific location (vehicle body outer side of the center) and has a limited contacting area, which reduces manufacturing precision requirements while maintaining attachment stability through localized force concentration.
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 solution effectively reduces vibration and noise in the cabin by lowering the natural frequency of the bracket below the cabin or engine resonance frequencies, enhancing vibration suppression across a broader frequency range without increasing weight or labor costs.
Implementation Method 1
the natural frequency of the bracket is adjusted by the weight member, thus reducing vibration to be transmitted to the cabin
Implementation Method 2
vibration to be transmitted to the cabin via the bracket can be reduced
Implementation Method 3
a cabin is supported via an anti-vibration member to a bracket
Data Source
AI summary
A work vehicle has a cabin supported via an anti-vibration member to a bracket that extends to a vehicle body outer side from a vehicle body frame. The bracket mounts a weight member. The weight member is attached to a position in the bracket, said position being located outward of the anti-vibration member, with the weight member protruding to the vehicle body outer side from the bracket.