Angled Battery Mounting for Portable Woodworking Routers
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Solution Overview
Problem
Large capacity batteries in portable cutting machines for woodworking tend to protrude and interfere with the grip handles, and their mounting changes the center of gravity, impairing handling during operation.
Innovation Solution
The portable cutting machine features left and right support members with a main body that is vertically movable and biased upward by a compression spring. A battery mounting part holds the battery at an angle of 70 to 90 degrees relative to an imaginary plane containing the support members, keeping the battery compact and preventing interference with the grip handles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If large capacity batteries are mounted on the router, then the power supply capacity is improved, but the battery protrudes in the left-right direction and interferes with the grip parts
Solution Approach 1:
The patent changes the battery orientation from parallel to the imaginary plane (0 degrees) to an angled orientation (70-90 degrees) relative to the imaginary plane. This dimensional change in orientation allows the battery to be mounted at an angle, projecting more in the up-down direction while occupying less space in the left-right direction, thereby eliminating interference with the grip parts while maintaining full battery capacity.
2Duration of action of moving object
If large capacity batteries are mounted on the router, then the power supply capacity is improved, but the center of gravity position changes and handling is impaired
Solution Approach 1:
By mounting the battery at an angle of 70-90 degrees relative to the imaginary plane, the patent redistributes the battery's mass distribution in three-dimensional space. This angular orientation positions the battery's center of gravity more centrally in the left-right direction while extending it in the up-down direction, thereby maintaining a stable center of gravity position that does not significantly shift when different battery sizes are interchangeably mounted, ensuring consistent handling characteristics.
3Volume of moving object
If the battery is held at an angle of 70 to 90 degrees, then the machine compactness and handling are improved, but the battery mounting structure becomes more complex
Solution Approach 1:
The patent specifies a precise angular parameter range of 70-90 degrees for battery mounting orientation. This parameter change optimizes the balance between compactness and structural simplicity. Within this angular range, the battery effectively projects in the up-down direction while minimizing left-right projection, achieving compactness without requiring overly complex mounting mechanisms.
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 configuration ensures good handling and stability regardless of the battery size, maintaining a constant center of gravity position and preventing the machine from falling over during use.
Implementation Method 1
The main body is biased upward by the biasing force of a compression spring disposed inside at least one of the support members
Data Source
AI summary
A battery mounting part (21) of a portable cutting machine (1), such as a router, holds a battery (3) oriented so that the longitudinal direction (L3) of the battery is at an angle of 70 to 90 degrees with respect to an imaginary plane (K) that contains left and right support members (11, 12) of the portable cutting machine. Consequently, even if batteries having different capacities are mounted on a battery mounting part (21) of the portable cutting machine, the position of the center of gravity of a main body (20) thereof will not differ greatly (or at all) in the left-right direction, and thus the weight balance is preserved and good handling is maintained, regardless of the size and/or weight of the battery that is mounted on the battery mounting part.