Undercut Opening Stop Point With Fixed Protrusion Load Retention
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Solution Overview
Problem
Existing stop points for undercut openings lack sufficient axial load-bearing capacity, leading to deformation under tensile loads and unintended release from the opening.
Innovation Solution
The stop point features an immovably connected holding protrusion to the shaft, which is monolithically formed with the shaft and stop region, providing enhanced stability and axial load-bearing capacity. This design includes support elements and a locking mechanism to secure the stop point within the opening, preventing tilting and rotation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If deflectable elements are used for interlocking with the undercut opening, then the stop point can be easily inserted and quickly removed, but the axial load-bearing capacity is insufficient leading to deformation and unintended release
Solution Approach 1:
The patent applies dynamics by using deflectable elements (balls or cylinders) that can change their state during operation: during insertion they are deflected transversely to allow passage through the opening, then in the installed position they are axially loadable to provide secure retention. This dynamic behavior allows the same elements to serve both insertion ease and load-bearing functions at different stages.
2Device complexity
If deflectable elements are arranged in the shaft interior, then the stop point structure can be compact, but the elements deform under tensile load causing release from the opening
Solution Approach 1:
The patent segments the stop point into distinct functional components: a shaft for insertion, deflectable elements (balls or cylinders) for interlocking with the undercut, and a stop region for securing the load. This segmentation allows each component to be optimized for its specific function while maintaining overall compactness.
3Adaptability or versatility
If the holding protrusion is movable or deflectable, then the stop point can adapt to the opening geometry, but the axial load-bearing capacity is reduced
Solution Approach 1:
The patent applies local quality by making different parts of the stop point have different properties: the deflectable elements (balls or cylinders) are made movable to adapt to the opening geometry and facilitate insertion, while the holding protrusion is made immovable and axially loadable to provide secure retention under load. This local differentiation of properties resolves the contradiction between adaptability and strength.
Data Source
AI summary
The invention relates to a stop point for inserting into an undercut opening. The stop point has a stop region for stopping a lashing, lifting, or stopping article, a shaft which extends along a shaft longitudinal axis away from the stop region for inserting into the opening, and a holding protrusion on the shaft end facing away from the stop region, the protrusion protruding transversely to the shaft longitudinal axis (L). In order to improve the reliability of stop points and in particular the axial load-bearing capacity, the holding protrusion is immovably connected to the shaft according to the invention.