Foundation Pile Coupling Sleeve With Pin-Slot Locking
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Solution Overview
Problem
Existing attachment systems for coupling tube ends to form foundation piles are often complex, expensive, and prone to wear due to the use of screw threads, making them difficult to uncouple and unsuitable for concrete pouring.
Innovation Solution
A simple and durable attachment system that couples female and male tube ends using cylindrical sleeve holes and a coupling element with a blocking pin and slot, allowing for rotational coupling without screw threads or elastic seals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If screw threads are used to lock coupling elements, then the coupling can be securely fastened, but the coupling becomes very susceptible to wear and difficult to uncouple
Solution Approach 1:
The patent removes screw threads entirely from the coupling system. Instead of using threaded fasteners, the invention employs a simple insertion mechanism where coupling elements are placed into sleeve holes and secured by blocking pins that prevent removal, eliminating the wear-prone screw thread component while maintaining secure fastening.
Solution Approach 2:
The patent replaces the mechanical screw thread system with a blocking pin mechanism. The blocking pin inserts into a blocking slot to prevent the coupling element from being removed, substituting the threaded fastening system with a simpler insertion-and-block system that is more resistant to wear from ground and concrete forces.
2Reliability
If complex attachment systems with multiple components are used, then the coupling can be secure and durable, but the system becomes expensive and difficult to manufacture
Solution Approach 1:
The patent divides the coupling system into simple, discrete components: tube ends with sleeve holes, separate coupling elements, and blocking pins. This segmentation allows each component to be manufactured independently using simple processes, reducing overall system complexity while maintaining durability through modular assembly.
Solution Approach 2:
The coupling elements serve multiple functions: they connect tube ends, transmit forces and torques, and can be easily replaced if needed. The blocking pin simultaneously secures the coupling element and prevents its removal, providing multi-functionality with minimal components, thereby reducing system complexity.
3Strength
If screw threads are used for coupling, then the components can be securely fastened, but the coupling system becomes expensive to construct
Solution Approach 1:
The patent employs simple, inexpensive coupling elements that can be manufactured at low cost without complex threading. These elements are designed to be replaceable if needed, using basic materials and simple geometries that reduce manufacturing expenses while maintaining adequate fastening strength for foundation pile applications.
Solution Approach 2:
By removing screw threads from the design, the patent eliminates the need for expensive threading machinery and complex manufacturing processes. The simplified insertion-based coupling system reduces construction costs while achieving secure fastening through the blocking pin mechanism.
Data Source
AI summary
Disclosed is an attachment system for detachably coupling a female tube end and a male tube end to each other to form foundation piles. The system includescorresponding cylindrical sleeve holes in tube sleeves of the tube ends;a coupling element which is fittable in the sleeve holes and rotatable through an angle therein;a blocking pin on the coupling element or on one of the sleeve holes; anda blocking slot in one of the sleeve holes or in the base body, so that the blocking pin engages in the blocking slot upon rotation of the coupling element in the sleeve holes.Additionally, one of the sleeve holes and the base body can be provided with corresponding sleeve slots in order to form a fitting hole together to fit a blocking element therein, in order to prevent rotation of the coupling element in the sleeve holes.