Screw Pickup and Tightening Nozzle for Stepped Hole Access
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Solution Overview
Problem
Existing devices for picking and tightening screws often damage the workpiece due to direct contact between the suction nozzle and the workpiece, and are limited to screw holes on flat planes, lacking versatility in handling screws with holes at other orientations.
Innovation Solution
A device comprising a transporting unit, a suction nozzle unit, and an electric screwdriver unit, driven by a motor, which uses a vacuum generator to pick screws and an adjustable mechanism to avoid direct contact with the workpiece during tightening, allowing for screws in various orientations and minimizing damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the suction nozzle directly contacts the workpiece during screw tightening, then the device can effectively pick and tighten screws, but the workpiece may be damaged
Solution Approach 1:
A buffer mechanism is introduced as an intermediary between the suction nozzle and the workpiece. This buffer absorbs excess force and prevents direct transmission of harmful forces to the workpiece, thereby protecting the workpiece from damage while maintaining effective screw tightening capability
Solution Approach 2:
The suction nozzle is equipped with a buffer mechanism that provides beforehand cushioning against potential workpiece damage. The buffer is pre-configured to absorb and mitigate forces that could otherwise cause damage during the screw tightening process
2Device complexity
If the suction nozzle is fixed for flat plane operations, then the device structure is simple, but it cannot handle screws with holes at other orientations
Solution Approach 1:
The suction nozzle is transformed from a fixed structure to a movable one, capable of adjusting its position and angle. This dynamic configuration allows the nozzle to adapt to screw holes at various orientations while maintaining a relatively simple overall device structure
Solution Approach 2:
The suction nozzle is designed with multi-functionality, serving both as a pickup device and as a positioning device for different screw hole orientations. This universal design enables the same component to handle various orientations without requiring completely separate devices for each orientation
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
The device effectively picks and tightens screws without damaging the workpiece, enabling screw tightening in screw holes with steps or non-flat orientations, ensuring precision and protection through adjustable spring mechanisms and double guidance systems.
Implementation Method 1
a suction nozzle unit (20), configured to pick the screw (200) through suction
Data Source
AI summary
A device for lifting and tightening screws includes a transporting unit to move the device to a screw suction position or a screw locking position, a suction nozzle unit, a vacuum generator, and an electronic screwdriver unit. When the device is moved to a position to attract and apply suction to a screw, the suction nozzle unit captures a screw. When the device is moved to the screw locking position, the electronic screwdriver unit tightens the screw. The device prevents the suction nozzle from contacting the workpiece, guides a suction position of the screw, and can function in relation to screw holes surrounded by steps and barriers.