Loop Handle Power Tool Battery Weight Balance
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Solution Overview
Problem
Conventional rechargeable electric power tools, such as angle drills, are heavy and difficult to operate due to the weight distribution of components like the chuck, spindle, deceleration mechanism, and battery packs, which affects their operability.
Innovation Solution
The design includes a loop-shaped handle housing with a battery mounting portion that holds two battery packs in a lateral posture, balancing the weight of the gear housing and motor, and a controller housing that allows airflow for cooling, with the controller positioned to optimize grip stability and balance, using a brushless motor and deceleration mechanism for efficient power transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If two battery packs are mounted on the battery base to provide sufficient power, then the power output is improved, but the weight increases and operability deteriorates
Solution Approach 1:
The patent repositions the battery mounting portion from a horizontal arrangement to a vertical arrangement, utilizing the vertical dimension to mount battery packs one above the other. This dimensional change allows the heavy battery packs to be positioned closer to the rear of the tool, balancing the weight distribution and improving operability while maintaining the required power output from two battery packs
2Ease of operation
If the battery mounting portion is disposed at the rear end of the housing to balance weight distribution, then the operability is improved, but the controller substrate placement becomes constrained
Solution Approach 1:
The controller substrate is positioned in the vertical dimension above the battery mounting portion, while the battery packs are mounted vertically below it. This vertical stacking arrangement in another dimension allows both the controller substrate and battery packs to coexist without interfering with each other, resolving the spatial constraint issue while maintaining improved operability through balanced weight distribution
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 improves the operability of the tool by balancing the weight and providing a stable grip, even when the tool is heavy, allowing for efficient and balanced operation with enhanced cooling of the controller and motor.
Implementation Method 1
airflow generated by rotation of a fan disposed at the rotation shaft passes through the controller housing portion to cool the controller
Data Source
AI summary
A rechargeable electric power tool includes a motor that includes a rotation shaft, a motor housing that houses the motor, a gear housing disposed ahead of the motor, a final output shaft that is held onto the gear housing and perpendicular to the rotation shaft, and a loop-shaped handle housing disposed at a rear of the motor housing, and a battery mounting portion configured to hold two battery packs is disposed at a rear portion of the handle housing.