Pipe Press-Fit Coupling Pin Structure for Stable Pressing Force
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Solution Overview
Problem
The existing pipe press-fit connecting apparatus experiences instability in providing pressing power due to increased clearance between guide blocks, leading to mechanical stress and potential damage, and the screw-nut engagement method is time-consuming and prone to nut loss.
Innovation Solution
A connecting device with a fastener and coupling pin system that allows for one-touch coupling and decoupling of the connected unit to the pressing power providing unit, using a resilient fastening pin and elastic member to maintain alignment and secure the connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a pin coupling is used to connect the connected unit to the guide blocks, then the connection is simple and quick, but the clearance between guide blocks increases due to mechanical stress, causing instability in pressing power delivery
Solution Approach 1:
The connection system is divided into multiple components: guide blocks, connected unit, coupling piece, and connecting device with fastening pin and elastic member. This segmentation allows each component to perform its specific function while maintaining overall system reliability and ease of operation.
Solution Approach 2:
The elastic member (spring) is introduced to create a dynamic connection that can adapt to mechanical stress. The spring allows controlled movement and maintains constant contact force between the coupling piece and guide blocks, preventing clearance increase while enabling quick coupling and decoupling operations.
2Adaptability or versatility
If the first and second guide blocks are spaced apart to accommodate the connected unit, then the connected unit can be coupled, but the mechanical stress from repeated operations increases clearance and may damage the guide blocks
Solution Approach 1:
The elastic member acts as a cushioning element that absorbs and distributes mechanical stress before it can damage the guide blocks. By placing the spring between the coupling piece and guide blocks, the system prepares for repeated stress cycles in advance, preventing clearance increase and guide block damage through controlled elastic deformation.
3Reliability
If a screw-nut engagement is used to fasten the connected unit, then the connection can be secured, but the process becomes time-consuming and the nut is prone to be lost
Solution Approach 1:
The complex screw-nut engagement mechanism is extracted and replaced with a simpler pin-based connecting device. The essential function of secure connection is maintained through the fastening pin and elastic member system, while eliminating the time-consuming screw threading process and the risk of nut loss.
4Reliability
If the tightening force is applied to narrow the clearance between guide blocks, then the connection is secured, but the movement of the cylinder rod is prevented and pressing power delivery becomes unstable
Solution Approach 1:
The elastic member changes the mechanical parameter of the connection from rigid to flexible. By introducing spring elasticity, the system maintains secure connection through continuous contact force while allowing the necessary movement of the cylinder rod, thus preventing pressing power delivery instability.
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 solution stabilizes the pressing power delivery, reduces the risk of guide block damage, and simplifies the coupling process, ensuring reliable and efficient pipe connections.
Implementation Method 1
a fastening pin resiliently supported by an elastic member, spaced apart from each other
Data Source
AI summary
A pipe press-fit connecting apparatus includes a connecting device. The connecting device may be used to connect a connected unit to a pressing power providing unit. The connecting device includes a fastener and a coupling pin. The fastener is installed at one end of the installation hole on an exterior surface of a cylinder block and has a fastening pin configured to be resiliently arranged and at least partially be exposed to the installation hole. The coupling pin is inserted through the installation hole and the insertion hole through another end of the installation hole on the exterior surface of the cylinder block to be resiliently coupled to the fastening pin to couple the connected unit to the pressing power providing unit.