Electric Chainsaw Handle Isolation for Motor And Chain Vibration
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Solution Overview
Problem
Chainsaws using electric motors experience vibrations that are transmitted to the handles, causing worker fatigue due to the motor's operation and the endless movement of the saw chain.
Innovation Solution
Incorporating anti-vibration members between the body casing and the handle section, along with a detachable battery pack to reduce vibration transmission, and strategically positioning the signal line connection within the anti-vibration region to prevent breakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If an electric motor is used as the driving source, then vibration can be reduced compared to internal combustion engines, but slight vibration from the motor and chain movement is still transmitted to the handles causing worker fatigue
Solution Approach 1:
An anti-vibration member is introduced as an intermediary element between the body casing and the handle section. This mediator absorbs and dampens vibrations generated by the electric motor and saw chain movement, preventing them from being transmitted to the handles and reducing worker fatigue.
Solution Approach 2:
The anti-vibration member converts the harmful vibration energy into beneficial damping effects. By strategically placing the anti-vibration member, the vibration that would otherwise cause fatigue is transformed into controlled energy dissipation, protecting the worker while maintaining operational functionality.
2Object-affected harmful factors
If anti-vibration members are added between the body casing and handle section, then vibration transmission is reduced, but device complexity increases
Solution Approach 1:
Instead of implementing anti-vibration measures throughout the entire chainsaw structure, the anti-vibration member is strategically placed only at the critical interface between the body casing and handle section. This localized approach effectively reduces vibration transmission while minimizing the increase in device complexity.
3Object-affected harmful factors
If the battery pack is attached to the body casing, then vibration is suppressed due to the heavy load, but weight of the chainsaw increases
Solution Approach 1:
The heavy battery pack, which would normally be considered a disadvantage due to increased weight, is strategically utilized as a vibration suppression mechanism. The mass of the battery pack acts as a counterweight that dampens vibrations, converting a potential harm (excessive weight) into a beneficial effect (vibration suppression).
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
Significantly reduces worker fatigue by minimizing vibration transmission and maintaining handle stability, while preventing signal line breakage due to vibrations.
Implementation Method 1
an anti-vibration member interposed between the body casing and the handle section... the anti-vibration member makes it less likely that vibration occurring due to driving of the electric motor and vibration occurring when the saw chain is endlessly moved
Implementation Method 2
at least one of the plurality of anti-vibration members is comprised using a coil spring or a tubular-shaped, flexible, elastic member
Data Source
AI summary
Disclosed is a chainsaw capable of making it less likely that vibrations due to driving of an electric motor and a endless movement of a saw chain are transmitted to a worker, thereby enabling the worker to become less likely to be fatigued even in work using the chainsaw. The chainsaw includes an electric motor provided inside a body casing; a guide bar provided in a front portion of the body casing in such a manner as to protrude forwardly; a saw chain provided around an outer periphery of the guide bar in an endlessly movable manner, and configured to be endlessly moved along the outer periphery of the guide bar under driving of the electric motor; a handle section provided with respect to the body casing, and configured to be gripped by a worker; and an anti-vibration member interposed between the body casing and the handle section.