Battery Pack Rear Mounting for Angle Power Tool Maneuverability
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Solution Overview
Problem
Existing electric power tools, such as angle polishers, face challenges in preventing scratches on sensitive surfaces like automobile bodies during use, and users experience limited maneuverability due to battery pack interference, leading to restricted movement and potential scratches.
Innovation Solution
The electric power tool design features a battery pack attachment at the upper surface of the tool main body, with its shortest dimension aligned vertically, and incorporates elastic members on the battery attachment portion to prevent contact with the working surface, ensuring the battery pack does not interfere with the user's hand or cause scratches.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the battery pack is attached to the lower portion of the tool main body, then the center of gravity is lowered improving stability, but the battery pack interferes with the user's hand causing limited maneuverability
Solution Approach 1:
The battery pack attachment position is moved from the lower portion to the rear portion of the tool main body, changing the spatial dimension of attachment. This dimensional shift relocates the battery pack away from the user's hand area while maintaining tool stability, resolving the contradiction between stability and maneuverability.
2Reliability
If the battery pack is attached to the lower portion of the tool main body, then power supply is secure, but the battery pack may contact the working surface causing scratches
Solution Approach 1:
The battery pack is extracted from the lower portion area that could contact the working surface and relocated to the rear portion of the tool main body. This extraction removes the harmful factor (battery pack contact) while preserving the power supply function through the maintained attachment capability.
3Ease of operation
If the battery pack is attached at the rear portion with shortest dimension vertically, then maneuverability is improved, but the attachment structure becomes more complex
Solution Approach 1:
The attachment portion is designed with differentiated local qualities: the battery attachment portion has a specific shape matching the battery pack's shortest dimension orientation, while other portions of the tool main body maintain their original structures. This localized design improvement achieves better maneuverability without unnecessarily complicating the entire device.
Data Source
AI summary
In an angle electric power tool 1 in which an output axis P intersects and is orthogonal to a motor axis J, a battery attachment portion 40 is provided to the rear of a grip 30 so as to extend in the rearward direction and a battery pack 50 is configured to be attached to an upper surface of said battery attachment portion 40. Because of this configuration, the battery pack 50 does not directly come into contact with a working surface W, thereby preventing flaws and scratches on the working surface W.