Elastic Body Extraction Device for Fragile Objects
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Solution Overview
Problem
Existing extraction methods for objects like discharge tubes and pegs are inefficient and can damage the objects due to uneven force application and the need for continuous pressing, especially when extracting objects with fragile materials like glass.
Innovation Solution
An extraction device comprising an elastic body, a first pressing unit, a second pressing unit, and a pulling unit, where the elastic body expands radially to create friction with the object, allowing for efficient extraction by pulling the object while maintaining contact and distributing force uniformly, reducing the need for continuous pressing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional extraction methods (hand, lever, or pushing from opposite side) are used, then the extraction process is simple in terms of device complexity, but the extraction efficiency is low and there is high risk of damage to fragile objects due to uneven force application
Solution Approach 1:
The patent employs an elastic body (flexible shell) that radially expands to contact the outer peripheral surface of the object to be extracted. This elastic body deforms elastically under axial compression from pressing units, generating radial expansion force that creates uniform friction contact around the entire circumference of the object, enabling efficient extraction without damaging fragile surfaces.
Solution Approach 2:
The extraction device utilizes dynamic force application through movable pressing units that can be positioned and adjusted along the elastic body. The pressing units apply variable axial forces at different positions, allowing the elastic body to dynamically expand and contract, creating controlled friction engagement and disengagement during the extraction process.
2Force
If continuous pressing is applied to maintain contact during extraction, then the friction force is sufficient for extraction, but large localized forces are applied that can damage fragile objects
Solution Approach 1:
The pressing force is segmented into multiple discrete pressing units distributed along the elastic body rather than applying a single concentrated force. Each pressing unit applies force at a specific location, and the elastic body distributes this force radially around the entire circumference of the object, converting localized axial compression into distributed radial friction contact.
Solution Approach 2:
The device transforms the force application from a single-point axial force into a distributed radial force system. The elastic body converts axial compression (one-dimensional) into radial expansion (two-dimensional contact), distributing the extraction force uniformly around the entire circumference of the object, thereby eliminating localized stress concentrations.
3Object-affected harmful factors
If uniform force distribution is achieved through elastic body expansion, then damage to fragile objects is prevented, but the device complexity increases due to multiple pressing units and elastic body mechanism
Solution Approach 1:
The elastic body automatically distributes the extraction force uniformly around the object's circumference through its inherent elastic properties. When pressed axially by the pressing units, the elastic body self-expands radially to contact the object, and its elastic recovery force naturally distributes the friction contact uniformly, eliminating the need for complex force distribution mechanisms.
Solution Approach 2:
The device changes the physical state and parameters of the elastic body through axial compression, transforming it from a relaxed state to an expanded contact state. The elastic body's material properties (elastic modulus, Poisson's ratio) enable it to convert axial stress into radial stress, automatically adjusting the contact pressure to match the object's geometry and maintain uniform force distribution.
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 enables easy and efficient extraction of objects with minimal risk of damage by generating sufficient friction for removal without continuous pressure, ensuring uniform force distribution and preventing large, localized forces from being applied.
Implementation Method 1
the elastic body configured to expanding in the second direction
Implementation Method 2
The pulling unit is configured to pull the object to be extracted with friction between the object to be extracted and the contact face
Data Source
AI summary
According to an embodiment, an extraction device includes an elastic body, first and second pressing units, and a pulling unit. The elastic body includes a first end facing a first direction, a second end, and a contact face facing a second direction intersecting with the first direction. The elastic body can expand in the second direction. The first and second pressing units press the first and second end. The pulling unit pulls the second pressing unit toward the first direction. The contact face comes into contact with an object when the elastic body compressed by pressing forces of the first pressing unit and the second pressing unit expands in the second direction. The pulling unit pulls the object with friction between the object and the contact face when the pulling unit is pulled in the first direction while the contact face of the elastic body is in contact with the object.