Ejecting Pin Disassembly for Interference-Fit Fasteners
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Solution Overview
Problem
Existing disassembling tools often cause damage to fastening components when attempting to remove them from devices, due to the interference fit or adhesive used, making the disassembly process inefficient and costly.
Innovation Solution
A disassembling device comprising a supporting base, clamping assembly, and pushing assembly that includes an ejecting pin with a flexible block to prevent rigid contact, allowing for controlled and safe removal of components from positioning holes without damaging the workpiece or the fastening components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional disassembling tools are used to remove fastening components, then the disassembly process can be performed, but the fastening components are damaged during removal
Solution Approach 1:
The patent introduces a pushing component with a pushing head that contacts the fastening component through a through hole, acting as an intermediary tool. This pushing head applies controlled force to the fastening component from within the workpiece, enabling removal without direct external contact that would cause damage. The pushing component serves as a mediator between the external actuation force and the fastening component, protecting it from damage during disassembly.
Solution Approach 2:
The method involves preliminarily forming a through hole in the workpiece before the actual disassembly operation. This preliminary action creates a controlled pathway through which the pushing component can access and remove the fastening component without causing damage. By preparing the through hole in advance, the system establishes a safe route for component removal that prevents harmful direct contact.
2Ease of operation
If force is applied to remove fastening components with interference fit or adhesive, then the components can be removed, but the workpiece may be damaged
Solution Approach 1:
The pushing component acts as an intermediary that transmits removal force through the through hole to the fastening component. This indirect approach allows force application without direct contact between external tools and the workpiece surface, preventing damage to the workpiece while still enabling effective removal of the fastening component.
Solution Approach 2:
The disassembly process is segmented into distinct stages: (1) forming a through hole in the workpiece, (2) inserting the pushing component through the hole, (3) applying force to the fastening component, and (4) removing the fastening component. This segmentation allows controlled force application at the precise location of the fastening component without transmitting damaging forces to the workpiece structure.
3Productivity
If conventional disassembly methods are used, then components can be removed, but the process causes waste and increases cost
Solution Approach 1:
The patent enables recovery of fastening components by removing them intact from the workpiece through the pushing mechanism. Instead of destroying or damaging the fastening components during disassembly, the system allows them to be retrieved and reused. This transforms the process from one of discarding components to one of recovering and reusing them, reducing waste and associated costs.
Solution Approach 2:
The through hole, which could be considered a modification or alteration of the workpiece, is converted into a beneficial feature that enables component recovery. By creating this pathway, the system transforms what might be seen as a negative (modifying the workpiece) into a positive outcome (enabling intact removal and reuse of fastening components).
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 safe and efficient disassembly of components, reducing the risk of damage and waste, while allowing for reuse and cost savings by using a controlled mechanism to push out components through a through hole without causing harm.
Implementation Method 1
The ejecting pin is provided with a flexible block to prevent rigid contact between the ejecting pin and the component
Data Source
AI summary
A disassembling device for removing fastening components embedded in a workpiece includes a supporting base, a clamping assembly, and a pushing assembly. The pushing assembly includes a sliding assembly, an adjusting rod, and an ejecting pin. The workpiece defines a first through hole which communicates with a positioning hole. The workpiece is clamped by the clamping assembly, the sliding assembly is connected to the supporting base and can slide along a first direction and a second direction perpendicular to the first direction. The adjusting rod passes through the sliding assembly to connect with the ejecting pin, the ejecting pin is driven to extend into the first through hole and to move in a direction perpendicular to the first and second directions, so as to push the fastening component out of the positioning hole.