Brush Cutter Handle Mount With Vibration Absorbing Floating Box
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Solution Overview
Problem
Existing brush cutters fail to effectively suppress vibration transmission from the drive unit or working unit to the handle, leading to discomfort and reduced user experience.
Innovation Solution
Incorporation of a vibration absorbing member within the brush cutter design, which fits between the tubular portion and the floating box, featuring an inner and outer peripheral surface with ribs and stopper portions to absorb and dissipate vibrations, thereby reducing the transmission of vibrations to the handle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a resin bush is integrally attached to the shaft to suppress vibration, then shaft vibration is reduced, but vibration transmitted from the drive unit to the tubular portion is not suppressed
Solution Approach 1:
A vibration absorbing member is introduced as an intermediary component between the tubular portion and the floating box. This member includes a damping material layer that absorbs vibrations transmitted from the drive unit, preventing them from reaching the handle. The vibration absorbing member acts as a mediator that decouples the vibration transmission path while maintaining structural connectivity.
Solution Approach 2:
The vibration absorbing member is constructed using composite materials, specifically combining a resilient base material with a damping material layer. This composite structure leverages the elastic properties of the base material and the vibration-damping characteristics of the damping layer to effectively suppress vibrations across different frequency ranges, addressing the limitation of using a single material type.
2Stability of the object's composition
If the floating box is rigidly connected to the tubular portion, then structural stability is improved, but vibration is transmitted to the handle
Solution Approach 1:
The vibration absorbing member serves as an intermediary connection between the tubular portion and the floating box. It maintains the structural connection necessary for stability while simultaneously absorbing vibrations, thus decoupling the stability function from the vibration transmission path.
Solution Approach 2:
The connection stiffness parameter is changed by introducing the vibration absorbing member with specific damping properties. This modifies the dynamic characteristics of the connection, allowing it to be stiff enough for structural stability at static and low-frequency conditions while being compliant enough to absorb high-frequency vibrations.
3Object-affected harmful factors
If vibration absorption components are added, then vibration suppression is improved, but device complexity increases
Solution Approach 1:
The vibration absorbing member integrates multiple functions into a single component: it provides structural connection between the tubular portion and floating box, incorporates vibration damping through the damping material layer, and maintains alignment through its geometric features. This merging approach avoids the need for separate connection and damping components.
Solution Approach 2:
The vibration absorbing member utilizes a damping material layer that functions as a flexible vibration-absorbing element. This thin-layer approach provides effective vibration suppression without adding significant bulk or complexity to the overall structure, maintaining a compact design.
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 vibration absorbing member effectively suppresses the transmission of vibrations from the drive unit or working unit to the handle, enhancing user comfort and reducing stress concentration, while improving the overall handling and portability of the brush cutter.
Implementation Method 1
a vibration absorbing member which fits in a tubular portion side fitting portion provided in the tubular portion and fits in a box side fitting portion provided in the floating box
Data Source
AI summary
This brush cutter includes: a drive unit; a working unit which is driven by power of the drive unit; a shaft which transmits the power of the drive unit to the working unit; a tubular portion which is disposed between the drive unit and the working unit, and in which the shaft is inserted; a floating box which has a handle support portion; and a handle which is supported by the handle support portion. The brush cutter is provided with a vibration absorbing member which fits in a tubular portion side fitting portion provided in the tubular portion and fits in a box side fitting portion provided in the floating box.