Working Tool Feeder Timing Control for Power Management
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Solution Overview
Problem
The existing electric driving tools face issues with power shortages during feeder operation, leading to potential misfires due to inappropriate timing of feeder feeding, and inefficiencies in power usage varying with temperature and power supply conditions.
Innovation Solution
A working tool with a magazine unit, ejection unit, striking unit, first and second drive units, and a control unit that allows the second drive unit to operate when the load of the first drive unit meets a specific condition, ensuring timely and efficient feeder operation by managing electric power effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the feeder operates during drive unit operation to maintain continuous fastener supply, then productivity is improved, but power shortage occurs leading to misfire
Solution Approach 1:
The control unit continuously monitors the operating state of the drive unit and uses this feedback information to determine the appropriate timing for feeder operation. By detecting whether the drive unit is currently operating, the control unit dynamically adjusts the feeder timing to avoid power conflicts, ensuring both continuous fastener supply and reliable operation without misfire.
2Reliability
If the feeder timing is set in advance to avoid power shortage, then misfire is suppressed, but response time is unnecessarily delayed when power is available
Solution Approach 1:
The feeder timing is made dynamic rather than fixed. The control unit adjusts the feeder operation timing in real-time based on the actual operating state of the drive unit. When the drive unit is not operating, the feeder can operate immediately without delay. When the drive unit is operating, the control unit delays the feeder operation until power becomes available. This dynamic adjustment optimizes both reliability and response time.
3Speed
If the feeder operates immediately when fastener is needed, then response time is improved, but power shortage occurs during drive unit operation
Solution Approach 1:
The system uses feedback from the drive unit's operating state to intelligently control feeder operation timing. The control unit receives real-time information about drive unit operation and uses this feedback to determine the optimal moment to operate the feeder, ensuring immediate operation when power is available while avoiding operation during power shortage periods.
Data Source
AI summary
A working tool includes a magazine unit in which a plurality of connected fasteners are stored in a rolled shape, an ejection unit to which the fastener is fed, a driver blade configured to strike the fastener held in the ejection unit to one side in a first direction, an electric motor configured to drive the driver blade by receiving an electric power, a feeder unit capable of moving in a second direction crossing the first direction and configured to feed the fastener stored in the magazine unit to the ejection unit by moving to one side in the second direction, a solenoid configured to drive the feeder unit by receiving an electric power, and a control unit configured to allow the solenoid to drive when a load of the electric motor satisfies a first condition.