Hand-Guided Power Tool Control Device Lateral Mounting
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Solution Overview
Problem
Hand-guided power tools, such as motor chainsaws, face challenges in optimizing the placement of electronic control devices relative to fuel tanks, leading to suboptimal weight distribution, accessibility, and protection against mechanical damage, while also requiring efficient routing of connecting lines and minimizing vibration loading.
Innovation Solution
The electronic control device is positioned laterally adjacent to the fuel tank, within a receptacle of the power tool housing that is open at least on one side, allowing for secure fixation and protection, with connecting lines routed through the tank housing to reduce complexity and vulnerability, and vibration-decoupling from the internal combustion engine.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the control device is arranged above the fuel tank and intake passage, then the available installation space can be utilized, but the center of gravity positioning becomes suboptimal and accessibility is reduced
Solution Approach 1:
The control device is relocated from a vertical arrangement (above the fuel tank) to a lateral arrangement (adjacent to the fuel tank). This dimensional change in positioning allows the control device to be integrated into the side area of the power tool housing, optimizing the center of gravity position and improving accessibility while still utilizing available installation space effectively.
2Ease of operation
If the control device is arranged laterally adjacent to the fuel tank, then the center of gravity positioning is optimized and accessibility is improved, but the connection complexity increases
Solution Approach 1:
The connecting lines between the control device and other components are routed through the tank housing, merging the routing path with an existing structural element. This integration approach simplifies the overall connection system by utilizing the tank housing as a conduit, reducing the need for separate routing channels and minimizing vulnerability of the connecting lines.
3Ease of operation
If the control device is exposed on the power tool housing, then accessibility is maximized, but the risk of mechanical damage increases
Solution Approach 1:
The control device is nested within a receptacle that is integrated into the power tool housing. This receptacle provides protective enclosure for the control device while maintaining accessibility through the open design. The nesting approach allows the control device to be shielded from mechanical damage during operation and transport, while still being accessible when needed for maintenance or replacement.
Data Source
AI summary
A hand-guided power tool has an internal combustion engine that is arranged in a power tool housing and drives a tool member of the power tool. A fuel tank and at least one electric component are provided. A control device that is an electronic control unit is connected to the at least one electric component and controls the at least one electric component. The power tool has a top face which, when parking the power tool in a usual parking position on a flat horizontal support surface, is facing upwardly. The electronic control unit has a plug contact and a connecting plug is plugged into the plug contact. The connecting plug is connected by a connecting line to the at least one electric component. The connecting plug is arranged on a top side of the control device which is facing upwardly in the usual parking position of the power tool.