Resilient Coupling Pin Structure for Stable Pipe Press-Fit Connection
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Solution Overview
Problem
The existing pipe press-fit connecting apparatus experiences instability in pressing power delivery due to increased clearance between guide blocks, leading to mechanical stress and potential damage, which complicates the coupling and decoupling of the pressing power providing unit and the connected unit.
Innovation Solution
A connecting device with a fastener and coupling pin system that allows for one-touch manipulation to securely couple and decouple the connected unit from the pressing power providing unit, using a resilient fastening pin and coupling pin mechanism to maintain alignment and stability, thereby reducing mechanical stress on the guide blocks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the connected unit is connected to the first and second guide blocks with a pin coupling, then the structure is simple and easy to manufacture, but the mechanical stress increases clearance between the guide blocks causing instability in pressing power delivery
Solution Approach 1:
The pin is designed to be movable rather than fixed, allowing it to dynamically adjust its position within the pin coupling hole as clearance increases. This dynamic adjustment maintains stable connection between the connected unit and guide blocks despite wear and clearance accumulation during repeated pipe connecting operations.
Solution Approach 2:
The movable pin acts as an intermediary element between the connected unit and the guide blocks. It absorbs the effect of increasing clearance through its own movement, preventing the clearance from directly affecting the stability of pressing power delivery to the pipe fitting.
2Duration of action of stationary object
If the clearance between guide blocks increases due to repeated pipe connecting processes, then the structure can accommodate wear, but the cylinder rod cannot stably provide pressing power to the connected unit
Solution Approach 1:
The movable pin compensates for clearance increases by adjusting its position dynamically. As the guide blocks wear and clearance increases over time, the pin moves to maintain proper alignment and connection, ensuring stable pressing power delivery throughout the service life of the guide blocks.
3Reliability
If the connected unit is firmly connected to the guide blocks, then the pressing power delivery is stable, but the coupling and decoupling process becomes complicated
Solution Approach 1:
The connection mechanism is segmented into two independent functions: the pin coupling for stable connection and the locking mechanism for secure locking. This segmentation allows the pin to provide stable pressing power delivery while the locking mechanism provides easy one-touch coupling and decoupling operations.
Solution Approach 2:
The pin is preliminarily positioned to align with the pin coupling hole before the locking operation. This preliminary positioning ensures that when the locking mechanism is activated, the connection is already established and stable, requiring only a simple locking action to complete the coupling process.
Data Source
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AI summary
The present disclosure provides a connecting device and a pipe press-fit connecting apparatus employing the 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.