Coupling Pin Extractor Radial Cylinder Design
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Solution Overview
Problem
Existing coupling pin extracting apparatuses face issues where components of the jig come into contact with the pin hole, leading to damage, and require a longer axial length, which can hinder operation and transportation of working machines.
Innovation Solution
A coupling pin extracting apparatus with a frame, cylinders, and a connection member that extends and guides the coupling pin orthogonally to the axial direction, preventing contact with the pin hole and reducing the overall length of the apparatus.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If components of the jig are arranged inside the pin hole to push out the coupling pin, then the coupling pin can be extracted from the pin hole, but the components of the jig may come into contact with the pin hole and get damaged
Solution Approach 1:
The patent changes the arrangement dimension from axial (inside the pin hole) to radial (outside the pin hole). The cylinder is arranged radially outward from the pin hole, with its axis perpendicular to the pin hole axis. The connection member extends radially inward to connect the cylinder movable portion to the coupling pin, enabling force transmission without axial intrusion into the pin hole.
2Productivity
If the jig is designed to remove a coupling pin from a pin hole, then the coupling pin can be extracted, but the length of the jig in the axial direction increases
Solution Approach 1:
The patent transitions from axial arrangement to radial arrangement. The cylinder is positioned radially outward with its axis perpendicular to the pin hole axis, and the connection member transmits force radially inward to the coupling pin. This dimensional change dramatically reduces the axial length requirement while maintaining extraction capability.
3Force
If the cylinder and coupling pin are arranged coaxially to push out the coupling pin, then the extraction force can be applied directly, but the jig components occupy space inside the pin hole and may contact the pin hole surface
Solution Approach 1:
The connection member acts as an intermediary that transmits extraction force from the cylinder movable portion to the coupling pin without direct contact between the cylinder components and the pin hole. The connection member extends radially inward from the cylinder to connect to the coupling pin, mediating the force transmission while keeping cylinder components outside the pin hole.
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 apparatus effectively extracts the coupling pin without damaging the jig components and minimizes the axial length, reducing protrusion and hindrance during machine operation and transportation.
Implementation Method 1
at least one cylinder, and a connection member. The frame is attached to the first coupling body... At least one cylinder is arranged to be opposed to the space portion in a direction orthogonal to the axial direction. The cylinder has a cylinder fixed portion which is fixed to the frame, and a cylinder movable portion which is fit on the cylinder fixed portion and is movable relative to the cylinder fixed portion.
Implementation Method 2
The connection member connects the coupling pin and the cylinder movable portion with each other such that the coupling pin is extracted from the pin hole in the axial direction and is also guided to the space portion in association with extension operation of the cylinder caused by relative movement of the cylinder movable portion.
Data Source
AI summary
Components of a jig are suppressed from coming into contact with a pin hole when a coupling pin is removed from the pin hole, and a length of the jig in a coupling pin axial direction is held down. A coupling pin attaching/detaching apparatus (a coupling pin extracting apparatus) includes a cylinder and a connection member. The cylinder is arranged outside a coupling pin in a radial direction of the coupling pin and is extensible. The connection member is connected to the coupling pin and the cylinder. Extension of the cylinder causes the coupling pin to be extracted from a pin hole via the connection member.