Work Machine Pin-Wheel Engagement Detection for Driver Alignment
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Solution Overview
Problem
The existing driver mechanism is prone to misalignment between the pin and rack due to jammed nails or rebound from hard materials, leading to potential damage and reduced convenience.
Innovation Solution
A working machine with a motor, striking portion, biasing portion, rotating portion, and control unit that ensures precise engagement and disengagement between the striking portion and rotating portion, using engagement portions along specific directions and a control unit to determine and correct misalignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the pin wheel rotates to push up the driver blade after driving, then the driver blade is lifted to the initial position, but misalignment between the pin and rack occurs when the nail is jammed or rebound is large
Solution Approach 1:
The control unit determines the engagement state between the pin and rack before the driver blade is pushed up. By detecting whether the engagement is normal or misaligned in advance, the system can prevent damaged engagement from occurring during the lifting operation.
Solution Approach 2:
The control unit continuously monitors the engagement state between the pin and rack through feedback from the motor current and rotation speed. Based on this feedback, the control unit determines whether misalignment has occurred and adjusts the lifting operation accordingly.
2Duration of action of moving object
If the driver blade is pushed up by the pin wheel, then the striking portion returns to the initial position, but the pin may become damaged due to misalignment
Solution Approach 1:
The control unit performs preliminary determination of the engagement state before initiating the pin wheel rotation to push up the driver blade. By checking whether the pin and rack are properly engaged in advance, the system prevents pin damage during the lifting operation.
Solution Approach 2:
The control unit uses feedback from motor current and rotation speed to monitor the engagement state in real-time. When misalignment is detected through feedback analysis, the control unit prevents the lifting operation or adjusts the rotation to avoid pin damage.
3Productivity
If the striking portion moves to strike the fastener, then the fastener is driven into the mating material, but misalignment causes the driver blade to collide with the last pin during driving
Solution Approach 1:
The control unit determines the engagement state between the pin and rack before the striking operation begins. By verifying proper engagement in advance, the system ensures that the driver blade will not collide with the pin during the fastener driving process.
Solution Approach 2:
The control unit monitors motor current and rotation speed to detect the engagement state during the striking operation. Through feedback analysis, the control unit identifies misalignment conditions and prevents or corrects them to avoid driver blade-pin collision.
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
Enhances the convenience of the working machine by preventing misalignment and damage to components, ensuring reliable operation.
Implementation Method 1
a biasing portion that biases the striking portion to the one side in the first direction
Implementation Method 2
a rotating portion that rotates by a driving force of the motor
Data Source
Figure 1
Figure 2
Figure 3
AI summary
To improve convenience of a working machine. A driver 10 includes a striking portion 12, a pin wheel 50 that rotates by a driving force of an electric motor, and a control unit that controls the electric motor. The pin wheel 50 has a plurality of rotating portion-side engagement portions, and the striking portion 12 has a plurality of striking portion-side engagement portions. The striking portion 12 moves upward when the pin wheel 50 rotates in an engaged state where the rotating portion-side engagement portion and the striking portion-side engagement portion is engaged with each other. The control unit determines whether or not the plurality of striking portion-side engagement portions and the plurality of rotating portion-side engagement portions have a predetermined engagement relationship in a striking operation.