Cable Tray Connecting Device With Integrated Teeth
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Solution Overview
Problem
Existing cable tray connecting devices require tools or additional elements for assembly and do not provide a strong, reliable connection, especially when cable trays need to be shortened or disassembled, leading to increased production complexity and reduced load-carrying capacity.
Innovation Solution
A metal band with perforations acting as weakening lines allows manual bending to fit around cable trays, featuring integrally molded teeth for secure engagement and electrical continuity, reducing manufacturing costs and complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If cable trays are connected using traditional screw connections or additional joining elements, then the connection strength is sufficient, but the assembly process requires tools and additional elements, increasing complexity and time consumption
Solution Approach 1:
The connecting device merges multiple functions into a single integrated component: the connection element itself serves as both the joining mechanism and the fastening mechanism, eliminating the need for separate screws, nuts, or clips. The tabs with integrated teeth provide both structural connection and self-fastening capabilities in one element.
Solution Approach 2:
The connecting device enables self-service assembly through its self-fastening mechanism. The teeth on the tabs automatically engage with the cable tray structure and lock into place through manual pressing, allowing installers to complete connections without requiring tools or specialized skills.
2Productivity
If cable trays are connected without overlapping using simple connection elements, then the assembly is easier and quicker, but the connection strength is insufficient to meet load-carrying requirements
Solution Approach 1:
The connecting device applies local quality enhancement by concentrating structural reinforcement at critical connection points. The teeth on the tabs provide localized engagement points that distribute loads effectively, while the overall simple geometry maintains ease of assembly. The connection element is simple in global form but features localized complexity where strength is needed.
3Adaptability or versatility
If cable trays are shortened to adjust length, then the fit to the array is improved, but the shortened end lacks standard attachments, requiring additional joining elements and tools
Solution Approach 1:
The connecting device achieves universality by being applicable to both full-length and shortened cable trays. The same simple connection element works regardless of tray length, eliminating the need for different joining methods. The design accommodates various tray configurations without requiring specialized components for shortened sections.
4Reliability
If traditional connecting devices with multiple cut-outs and bent tabs are used, then the connection can be secured, but the production complexity and manufacturing costs increase significantly
Solution Approach 1:
The connecting device uses segmentation strategically with minimal tabs featuring teeth, rather than multiple complex cut-outs and bent tabs. This segmented approach with focused reinforcement points achieves reliable connection while maintaining manufacturing simplicity. The segmentation is applied only where structurally necessary.
Solution Approach 2:
The invention simplifies manufacturing by changing the geometric parameters of the connection element from complex multi-dimensional bends and cut-outs to a simpler form with minimal features. The tabs with teeth represent a parameter change from complex shaped elements to simpler geometries that are easier to manufacture while maintaining connection reliability.
Data Source
Figure 1~2
AI summary
A metal cable tray connecting device that is formed as a U-formed groove with a flat central portion and lateral sides extending substantially perpendicularly to the central portion, wherein each respective lateral side is connected in a form-locking manner with the central portion through a first weakening line in the form of perforations; each lateral side comprises an outer lateral portion and an inner lateral portion in the form of a flap extending into the interior of the groove in parallel to the outer lateral portion and is connected to the outer lateral portion through a second weakening line in the form of perforations; the free end of the inner lateral portion has an edge formed as a set of teeth that engage the bottom of a cable tray when the device is arranged onto the cable tray.