Handheld Screwdriver Torque Clutch Monitoring Feedback Control
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Solution Overview
Problem
Handheld screwing apparatuses with torque clutches struggle to precisely control and monitor the maximum torque transmitted to tools, leading to potential tool damage and inefficiencies in screwing operations.
Innovation Solution
Incorporating a monitoring unit to measure and output the characteristic rotational offset quantity, allowing for adjustable maximum torque transmission and control of the drive unit based on this data, which includes a mechanical torque clutch that disengages when maximum torque is exceeded, and a control unit that adjusts engine speed to prevent wear and optimize tool operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a torque clutch is used to restrict maximum torque transmission, then tool damage is prevented, but precise control and monitoring of the maximum torque is difficult
Solution Approach 1:
A monitoring unit detects the rotational offset of the torque clutch and provides feedback signals to a control unit. This feedback mechanism enables precise monitoring of the torque transmission state, allowing the system to accurately control and respond to torque conditions while maintaining reliable tool protection.
Solution Approach 2:
The patent replaces purely mechanical torque control with a hybrid system that uses electrical sensors and electronic control. The monitoring unit converts mechanical rotational offset into electrical signals, enabling precise digital monitoring and control of torque parameters that cannot be achieved with mechanical mechanisms alone.
2Reliability
If the torque clutch disengages when maximum torque is exceeded, then torque transmission is protected, but wear on the torque clutch increases
Solution Approach 1:
The monitoring unit continuously monitors the rotational offset and provides real-time feedback to the control unit. This enables the control unit to detect approaching torque limits and take preventive action before the torque clutch disengages, reducing the frequency and intensity of disengagement events that cause wear.
Solution Approach 2:
The control unit uses feedback from the monitoring unit to take preliminary actions when torque approaches maximum limits, such as reducing engine speed or applying service brakes. This preventive approach avoids repeated torque clutch disengagements, thereby extending its service life while maintaining protection functionality.
3Productivity
If engine speed is controlled to optimize tool operation, then screwing efficiency is improved, but device complexity increases
Solution Approach 1:
The control unit performs multiple functions: it monitors torque clutch status, controls engine speed, and operates service brakes. By consolidating these functions into a single control unit that receives feedback from the monitoring unit, the system achieves optimized screwing efficiency without proportionally increasing complexity, as the same hardware serves multiple purposes.
Data Source
AI summary
A handheld screwing apparatus having a torque clutch provided to restrict a torque that is maximally able to be transmitted to an inserted tool. The handheld screwing apparatus includes at least one monitoring unit, which is set up to ascertain a characteristic rotational offset quantity that describes a rotational offset of the torque clutch.