Portable Power Tool Battery Mounting for Compact Design
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Solution Overview
Problem
Existing portable power tools face challenges in compact design and uniform force distribution during operations like sanding and polishing due to battery placement, leading to user burden and tool size issues.
Innovation Solution
A battery mounting part is designed to be slid in at an angle of 30 degrees or less from the horizontal direction, allowing even distribution of the battery's weight and reducing tool size by positioning it above the motor shaft, thus enabling a more compact and stable power tool with reduced user effort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the battery is mounted on the side wall of the sander, then the tool can be operated, but the user must apply significant downward pressure and the tool size increases
Solution Approach 1:
The battery mounting surface is positioned on the bottom surface of the sander body rather than the side wall, changing the mounting dimension from vertical side attachment to horizontal bottom attachment. This dimensional change allows the battery weight to act downward through the motor shaft, eliminating the need for additional downward pressure while maintaining compact tool dimensions
2Ease of manufacture
If the battery mounting surface is positioned to allow easy battery attachment, then battery installation is simplified, but the tool becomes less compact
Solution Approach 1:
The battery mounting surface is specifically positioned on the bottom surface of the sander body at a location that optimizes both accessibility and compactness. This localized positioning allows the battery to be attached easily from below while the battery's weight is distributed through the motor shaft, achieving both ease of installation and compact tool design simultaneously
Data Source
AI summary
A portable power tool includes a first handle extending in an elongated manner and configured to be held by a user, an electric motor, a tool accessory that undergoes orbital and/or rotational motion in response to generation of a rotational driving force by the electric motor, and a battery mounting part configured to detachably attach a battery that serves as a power source for the electric motor. The battery mounting part includes an upward mounting surface on which the battery is mountable, and at least one terminal configured to be electrically connected to the battery when a surface of the battery that includes a connection interface is placed on the mounting surface. The mounting surface is located at a position different from the first handle in the front-rear direction, and is located below an upper side of the first handle in the up-down direction.