Interposing Element Tension Distribution for Loading Platform Fastening
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Solution Overview
Problem
Traditional fastening systems for motor vehicles on loading platforms suffer from permanent distortions and reduced pre-load due to high tension concentrations at contact areas between universal hooks and oval holes, leading to decreased safety.
Innovation Solution
A fastening system with three interposing elements, each equipped with cooperating means to distribute tension concentrations, including a ratchet, a reinforcing plate, and a central pin with a locking/unlocking device, to minimize pressure and prevent accidental disengagement, ensuring optimal force application and distribution across the platform.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If universal hooks are used to fasten belts to oval holes, then the fastening system is simple and easy to operate, but high tension concentrations occur at the contact area causing permanent distortions and reduced safety
Solution Approach 1:
The patent introduces an intermediary element (the fastening device with distributing elements) between the belt and the oval hole. This intermediary distributes the contact area from a point contact to a line or surface contact, reducing tension concentration while maintaining ease of operation. The distributing elements act as mediators that transfer forces more evenly across the hole perimeter.
Solution Approach 2:
The invention transitions from point contact (zero-dimensional) to line contact (one-dimensional) or surface contact (two-dimensional) by introducing distributing elements that extend along the perimeter of the oval hole. This dimensional change increases the contact area and reduces stress concentration while preserving operational simplicity.
2Device complexity
If simple hooks are used for fastening, then the device complexity is low, but permanent distortions occur in the loading platform sheets
Solution Approach 1:
The fastening device serves as an intermediary that prevents direct point contact between the hook and the oval hole. The distributing elements intervene to spread the contact forces, eliminating the harmful stress concentration that causes permanent distortions while adding minimal complexity to the overall system.
Solution Approach 2:
The distributing elements are pre-configured in the fastening device to automatically engage with the oval hole perimeter when installed. This preliminary arrangement ensures that force distribution is established before loading occurs, preventing distortions from the outset without requiring complex active control mechanisms.
3Device complexity
If hooks create point contact with oval holes, then the fastening system is simple, but high tensions and pressures permanently distort the contact area
Solution Approach 1:
The invention applies dimensionality change by extending the contact from a point (zero-dimensional) to a line or surface (one or two-dimensional) through the distributing elements that follow the oval hole perimeter. This increases the contact area and reduces stress concentration while maintaining relatively simple device structure.
Solution Approach 2:
The fastening device segments the force transmission path by introducing multiple distributing elements along the oval hole perimeter. Instead of a single point contact, the force is segmented into multiple contact points distributed around the hole, reducing the stress at each individual point while maintaining overall structural simplicity.
Data Source
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AI summary
A fastening system for holding belts is described, aimed in particular to be used for transporting motor vehicles on loading platforms, comprising at least one interposing element (1A; 1B; 1C) arranged between a belt (3) and a platform (5), the interposing element (1A; 1B; 1C) being equipped with cooperating means with the platform (5) adapted to minimize tension concentrations induced by a force exerted by the belt (3) on the platform (5) .