Cordless Power Cutter Layout for Weight Balance and Easy Handling
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Solution Overview
Problem
Current power cutters, such as cutoff saws, are heavy, unwieldy, and require inconvenient and problematic power sources, including cords, gasoline, and external compressors, limiting their functionality in various work environments.
Innovation Solution
A cordless power cutter design featuring a housing with a removable battery-powered motor, a belt-free drive system, and a balanced ergonomic layout that includes a lifting handle, allowing for efficient cutting and grinding without the need for external power sources, with a center of gravity that ensures stability and ease of use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a corded power cutter is used, then continuous power supply is ensured, but portability and ease of operation deteriorate due to power cord requirements
Solution Approach 1:
The invention extracts the power source (battery) from external infrastructure and integrates it directly into the tool housing, eliminating the need for external power cords or outlets. This allows the tool to operate independently of external power sources while maintaining continuous operation capability.
Solution Approach 2:
The power supply system transitions from a static corded connection to a dynamic battery-powered system that can adapt to different work environments. The battery provides flexible, mobile power supply that moves with the tool, enhancing portability while ensuring continuous operation.
2Power
If a gasoline-powered cutter is used, then high power output is achieved, but weight and operator burden increase
Solution Approach 1:
The invention replaces the gasoline engine (mechanical/chemical system) with an electric motor powered by a battery. This substitution eliminates the need for fuel tanks, exhaust systems, and complex engine components, significantly reducing tool weight while maintaining adequate power output for cutting applications.
Solution Approach 2:
The power delivery characteristics are changed from the high-RPM, low-torque profile of gasoline engines to the high-torque, controlled-speed profile of electric motors. This allows for efficient power delivery in cutting applications with reduced weight, as electric motors provide sufficient torque at lower speeds without requiring heavy engine components.
3Power
If pneumatic or hydraulic power sources are used, then high cutting power is achieved, but device complexity and portability deteriorate
Solution Approach 1:
The invention extracts the power generation system from external equipment (air compressors or hydraulic pumps) and integrates a self-contained battery-powered motor directly into the tool. This eliminates the need for separate, complex external power systems and their associated hoses, connectors, and fluid management components.
Solution Approach 2:
The power source (battery) and power conversion device (motor) are merged into a single integrated unit within the tool housing. This combination creates a self-contained system that provides high cutting power without the complexity of external pneumatic or hydraulic systems, improving both portability and ease of operation.
4Productivity
If traditional power cutter designs are used, then cutting function is provided, but operator fatigue increases due to poor balance
Solution Approach 1:
The invention employs asymmetric placement of the battery pack and motor components within the housing to achieve optimal center of gravity positioning. The battery is positioned to counterbalance the weight of the cutting head and blade, creating a balanced tool that is easier to control and reduces operator fatigue during extended use.
Solution Approach 2:
The battery pack serves as a counterweight to balance the tool. By strategically positioning the battery mass opposite to the cutting head, the tool achieves neutral balance, reducing the effort required by the operator to control and maneuver the tool during cutting operations.
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
The cordless power cutter provides balanced, lightweight operation with high performance, enabling efficient cutting and grinding of various materials without the need for external power sources, reducing operator fatigue and increasing usability in diverse environments.
Implementation Method 1
a motor mounted to a longitudinally opposite end of the housing, the motor having a motor shaft rotatable about a motor axis, the motor being powered by the power source
Data Source
AI summary
The cordless power cutter that is lightweight and weight-balanced between a power section housing a battery pack as a power source and a cutting section including a motor in a belt-free drive system and rotatable disk blade. The weight balancing of the cordless power cutter allows the tool to remain parallel to a horizontal surface, such as the ground, without tilting, when the operator lifts and holds the tool by only a gripping or transverse portion of the lifting handle. The motor has a motor axis that is not perpendicular to the disk axis and that is rearward of the disk axis to provide a depth of cut. The weight-balance and motor positioning allows the cordless power cutter to achieve ease of handling and operation.