Chainsaw Motor Cooling Air Filter Placement
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Solution Overview
Problem
Conventional electric chainsaws face issues with dust accumulation in the cooling route due to intake design, which reduces motor cooling efficiency and maintenance challenges.
Innovation Solution
An electric working tool with a body case featuring an air filter housed between the intake and cooling route, and a filter insertion/extraction hole allowing easy filter attachment and detachment, positioned separately from the intake, preventing dust from entering the cooling route.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the intake is opened on the body case to enable air flow for motor cooling, then motor cooling efficiency is improved, but dust enters the cooling route and accumulates, reducing cooling efficiency and increasing maintenance difficulty
Solution Approach 1:
An air filter is introduced as an intermediary component between the intake and the cooling route. The air filter allows air to pass through while blocking dust particles, thus maintaining motor cooling efficiency while preventing dust accumulation in the cooling route.
2Object-affected harmful factors
If the air filter is housed between the intake and cooling route to prevent dust entry, then dust accumulation is reduced, but the filter requires attachment and detachment operations that complicate the device structure
Solution Approach 1:
The air filter is designed with multi-functionality: it serves as both a dust-blocking filter and a maintenance access point. The filter's housing structure allows it to be easily attached and detached, combining dust prevention functionality with simplified maintenance access, reducing the need for separate complex access mechanisms.
3Device complexity
If the filter insertion/extraction hole is positioned at the same location as the intake, then the device structure is simplified, but the position and size of the intake cannot be optimized for cooling efficiency
Solution Approach 1:
The functions of air intake and filter access are segmented into separate locations. The intake is positioned to optimize air flow and cooling efficiency, while the filter insertion/extraction hole is positioned separately to facilitate maintenance. This spatial segmentation allows both cooling optimization and maintenance accessibility without compromising either function.
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 air filter effectively prevents dust from entering the cooling route, enhancing motor cooling efficiency and simplifying maintenance by allowing easy filter access and cleaning, while allowing for optimized intake positioning based on cooling efficiency considerations.
Implementation Method 1
an air filter housed between the intake and the cooling route
Implementation Method 2
air is taken through the intake into a cooling route in the body case to cool a motor mounted in the cooling route
Data Source
AI summary
A chainsaw (electric working tool) includes a body case; a cutting part (working implement); and a motor, wherein the motor is mounted in a cooling route in the body case; an intake communicating with the cooling route is opened on the body case; an air filter is housed between the intake and the cooling route; the body case has a filter insertion/extraction hole through which the air filter can be inserted and removed; the intake is opened on the outer surface of the body case; and the filter insertion/extraction hole is arranged at a portion other than that of the intake so that the motor can be efficiently cooled, dust hardly enters the cooling route, and maintenance can be easily performed.