Electronic Clutch Control for Multi-Speed Power Tools
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Solution Overview
Problem
Existing power tools lack advanced torque control mechanisms, particularly in brushless DC motors, leading to inefficiencies and limited user customization.
Innovation Solution
A power tool with a clutch collar and a wireless transceiver that allows for multiple torque settings, controlled by a processor to detect and indicate when torque levels are exceeded, and can be customized through a remote device for enhanced user control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional mechanical clutch mechanisms are used in power tools, then torque control is achieved through physical feedback, but the device complexity increases and user customization is limited
Solution Approach 1:
The patent replaces the traditional mechanical clutch mechanism with an electronic control system. The processor monitors motor current to detect torque levels and controls the motor accordingly, eliminating the need for physical clutch mechanisms while achieving the same torque control function. This substitution reduces device complexity while maintaining ease of operation.
Solution Approach 2:
The patent introduces a wireless transceiver as an intermediary between the user and the power tool's control system. Users can remotely configure torque settings and receive feedback without physically interacting with the tool, simplifying the user interface while enabling customized torque control through wireless communication.
2Adaptability or versatility
If multiple torque settings are implemented with mechanical clutches, then user customization is improved, but the device complexity and manufacturing difficulty increase
Solution Approach 1:
The patent replaces multiple mechanical clutch settings with software-based torque control. The processor can dynamically adjust torque levels through code, eliminating the need for multiple physical clutch mechanisms. This approach improves adaptability while significantly easing manufacturing, as software updates can add or modify torque settings without hardware changes.
Solution Approach 2:
The patent implements dynamic torque control where the processor can adjust torque settings in real-time based on operational conditions and user preferences. This dynamic approach allows for unlimited torque configurations without the static limitations of mechanical clutch positions, enhancing versatility while maintaining simple manufacturing.
3Adaptability or versatility
If electronic control systems are added to provide torque monitoring and customization, then adaptability and user control are improved, but device complexity increases
Solution Approach 1:
The patent integrates the wireless transceiver and processor into the existing power tool architecture, allowing these components to serve multiple functions: torque monitoring, settings customization, feedback provision, and communication. This multi-functionality approach improves adaptability while minimizing the increase in device complexity by consolidating control functions.
Solution Approach 2:
The processor automatically monitors motor current and detects torque levels without requiring additional sensors or complex electronic circuits. The system uses existing electrical parameters to infer torque information, enabling adaptive torque control while keeping the electronic control system simple and self-sufficient.
Data Source
AI summary
A power tool and a method of operating a power tool including a motor, a clutch collar including a plurality of settings, a wireless transceiver operable to form a wireless connection with a remote device, and a processor coupled to the clutch collar and the wireless transceiver. The processor receives, via the wireless transceiver, a mapping including a plurality of torque levels corresponding to the plurality of settings. The processor detects that the clutch collar is set to a setting of the plurality of settings. The processor determines the torque level for the setting from the mapping and detects, during the operation of the power tool, that a torque of the power tool exceeds the torque level. The processor is also configured to generate an indication that the torque exceeds the torque level. The indication may include flashing a light, ratcheting the motor, and stopping the motor.