Brush Cutter Handle Anti-Vibration Structure
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Solution Overview
Problem
Conventional portable brush cutters transmit engine vibrations directly to the user's hand, causing discomfort during prolonged use due to complex and inefficient anti-vibration structures.
Innovation Solution
An anti-vibration structure for the handle device featuring an attachment stay unit with recesses and protrusions that sandwich anti-vibration materials between the handle and the pole, allowing the materials to deform and absorb vibrations, reducing the transmission of engine vibrations to the handle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If anti-vibration materials are disposed between the pole and the handle, then vibration transmission to the user is reduced, but the structure becomes complicated and the handle stability deteriorates
Solution Approach 1:
The anti-vibration material is nested within the groove of the attachment stay unit, with the operation handle's protrusion fitting into the material. This nested configuration allows the anti-vibration material to be integrated into the attachment structure without adding external components, thereby reducing vibration transmission while maintaining structural simplicity and handle stability.
2Stability of the object's composition
If the operation handle is firmly fixed to the pole, then handle stability is improved, but the structure becomes complicated
Solution Approach 1:
The anti-vibration material acts as a flexible element between the rigid attachment stay unit and the operation handle. This flexible material provides sufficient friction and mechanical interlocking through the groove and protrusion design to maintain handle stability, while eliminating the need for complex fastening devices, bolts, or additional fixing mechanisms.
3Stability of the object's composition
If conventional fastening methods are used to secure the handle, then handle stability is improved, but ease of operation deteriorates due to complex assembly
Solution Approach 1:
The attachment structure is segmented into three distinct components: the attachment stay unit with a groove, the anti-vibration material, and the operation handle with a protrusion. This segmentation allows each component to be manufactured independently and assembled in a simple sequence by inserting the protrusion into the groove, providing both handle stability and ease of assembly without complex fastening procedures.
4Object-affected harmful factors
If anti-vibration materials are firmly fixed in position, then vibration absorption is improved, but ease of manufacture deteriorates
Solution Approach 1:
The anti-vibration material is designed to be self-positioning within the groove of the attachment stay unit, with the operation handle's protrusion serving as both a connector and a positioning element. When assembled, the protrusion automatically centers the anti-vibration material in the groove, eliminating the need for additional fixing mechanisms or complex alignment procedures, thereby maintaining effective vibration absorption while simplifying the manufacturing and assembly process.
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
This design effectively reduces handle vibration, enhances operability, and simplifies the structure for easy assembly and adjustment, while maintaining effective vibration absorption and user comfort.
Implementation Method 1
the vibration of the engine is directly transmitted to the user's hand... dampening the vibration from the engine so as not to be transmitted to the handle or to the lever device
Implementation Method 2
anti-vibration materials, such as anti-vibration rubber or a metal spring, between the pole and the handle or between the pole and the lever device, thereby dampening the vibration
Data Source
Figure 1A~1B
Figure 2
Figure 3
AI summary
According to one embodiment, there is provided an anti-vibration structure for a handle of a portable brush cutter, the structure including: a pole (2); an operation unit (3) provided at a front portion of the pole (2); an engine (1) provided and a lever device (4) provided at a base portion of the pole (2); an attachment stay unit (10) fixed to a middle portion of the pole (2), the attachment stay unit (10) having an accommodation recess (20) at each end thereof; an operation handle (5) having a protrusion (27) protruding from each end thereof; and anti-vibration materials (18) sandwiched between the attachment stay unit (10) and a handle main body (22) in a left-right direction of the pole (2), so that one side of the anti-vibration material (18) is accommodated in the accommodation recess (20) while the protrusion (27) is inserted in an open-groove (32) formed on the other side of the anti-vibration material (18).