Integrated Vacuum Sensing in Tightening Tools for Screw Pickup
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Solution Overview
Problem
Existing power screw drivers with vacuum adapters require external vacuum sensors, increasing system complexity and requiring additional integration steps, which complicates their use in production environments.
Innovation Solution
A power screw driver design with an integrated vacuum sensor within the housing to sense sub-atmospheric pressure in the vacuum adapter, eliminating the need for external sensors and enabling self-determination of screw pickup status for automated processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Difficulty of detecting and measuring
If an external vacuum sensor is added to detect vacuum pressure in the vacuum adapter, then the screw pickup status can be detected, but the device complexity increases
Solution Approach 1:
The vacuum sensor is integrated directly into the vacuum adapter, merging the detection function with the existing vacuum component. This eliminates the need for separate external sensors and reduces system complexity while maintaining detection capability
Solution Approach 2:
The vacuum adapter serves as an intermediary component that both creates vacuum and houses the vacuum sensor. This mediator approach allows the sensor to be positioned optimally for detection while being part of the existing vacuum generation system
2Adaptability or versatility
If external vacuum sensors and auxiliary adapters are used, then vacuum functionality is achieved, but the integration steps and configuration requirements increase
Solution Approach 1:
The vacuum sensor is combined with the vacuum adapter into a single integrated unit, reducing the number of separate components that need to be manufactured and integrated. This merging simplifies the overall manufacturing process while maintaining full vacuum functionality
3Loss of information
If the power screw driver controller receives signals from external vacuum sensors, then screw pickup status can be determined, but the signal transmission and control complexity increase
Solution Approach 1:
The integrated vacuum sensor acts as an intermediary that directly interfaces with the power screw driver controller through the existing communication bus. This eliminates the need for additional signal transmission hardware and simplifies the control architecture while ensuring accurate information transfer
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
Simplifies integration and operation by allowing the power screw driver to determine screw pickup status internally, reducing complexity and facilitating seamless transitions between screw pickup and tightening positions without external sensor configurations.
Implementation Method 1
an in the housing integrated vacuum sensor arranged to sense the sub-atmospheric pressure in the vacuum adapter
Data Source
Figure 1
Figure 2
AI summary
The present disclosure relates to a power screw driver (10) comprising a housing (11). The housing (11) encloses a motor (12) and a bit drive spindle (15) at a front end for driving a bit (17). The power screw driver is at the front end connectable to a vacuum adapter (16) having screw pick-up functionality by which a screw to be mounted is brought into engagement with the bit (17). The power screw driver (10) further comprises an in the housing integrated vacuum sensor (18) arranged to sense the sub-atmospheric pressure in the vacuum adapter (16).