Brush Cutter Battery Pack Arrangement for Balance
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Solution Overview
Problem
Existing brush cutters rely on large, expensive high-voltage battery packs that are not interchangeable with other electric power tools, limiting their utility and efficiency.
Innovation Solution
A brush cutter design utilizing rechargeable battery packs commonly used in electric power tools, arranged to maintain balance and prevent lateral inclination, with attachments for easy mounting and removal, and connected in series or parallel to provide high output power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a large size high voltage battery pack is used to activate the electric motor of high power, then the motor can operate with sufficient power, but the battery pack becomes expensive and cannot be used as a source of power supply for other electric power tools
Solution Approach 1:
The brush cutter is designed to accept standard battery packs that are universally compatible with other electric power tools. The power tool can function as multiple devices: a brush cutter when equipped with a cutting blade, and potentially other functions when different attachments are used. This allows the use of common battery packs rather than specialized high-voltage batteries.
Solution Approach 2:
The invention combines the brush cutter functionality with a standard power tool platform that accepts common battery packs. By integrating the cutting mechanism into a multi-functional power tool body, the system merges the brush cutter function with the versatility of standard battery-powered tools, allowing one battery pack to serve multiple purposes across different tools.
2Adaptability or versatility
If standard battery packs are used instead of large size high voltage battery packs, then the battery packs become interchangeable with other electric power tools and less expensive, but the output power may be insufficient
Solution Approach 1:
The power tool is designed with dynamic capabilities including variable speed control and adjustable power delivery. The motor can operate at different power levels depending on the task requirements, allowing standard battery packs to provide sufficient power for brush cutting applications without requiring high-voltage batteries. The system adapts power delivery to match actual operational needs.
Solution Approach 2:
The invention utilizes parameter changes in the motor control system to optimize power delivery from standard battery packs. By adjusting electrical parameters such as current draw, voltage regulation, and duty cycle, the system maximizes the effective power output from standard battery packs, making them sufficient for brush cutting applications despite their lower nominal voltage compared to specialized high-voltage batteries.
3Device complexity
If the center of gravity is positioned centrally on the frame rod, then the brush cutter structure is simple, but the tool may experience lateral inclination during operation
Solution Approach 1:
The battery packs are positioned asymmetrically within the power tool housing rather than symmetrically around the centerline. This asymmetric arrangement shifts the center of gravity laterally to compensate for operational forces, preventing lateral inclination during brush cutting. The asymmetric positioning creates a stabilizing effect that maintains tool orientation during use.
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
Enables efficient operation without the need for specialized battery packs, improves balance and operability, and reduces the risk of damage by spacing batteries from the ground, while allowing for easy battery management and extended tool usage.
Implementation Method 1
an electric motor mounted within the front housing for rotating the cutting blade
Implementation Method 2
the source of power supply is in the form of a plurality of rechargeable battery packs adapted to use in electric power tools
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
A brush cutter 10 comprised of a frame rod 11, a front end housing 21 fixedly mounted to a front end of the frame rod 11, a cutting blade 25 mounted on a support shaft 24 within the front end housing 21, a rear end housing 31 fixedly mounted to a rear end of the frame rod 11, an electric motor 22 mounted within the rear end housing 31 for rotation of the cutting blade 25, and a source of power supply 40 for supplying electric power to the motor. In the brush cutter, a plurality of rechargeable battery packs 41 adapted to use in electric power tools are used as the source of power supply 40 for the motor.