Cable Duct Support Foot with Radial Engagement Mechanism
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Solution Overview
Problem
Existing cable ducts for electrical cables face difficulties in adjusting height, especially for long ducts, as multiple support feet need to be adjusted individually, making it cumbersome and time-consuming, especially when requiring adjustments over a large height range.
Innovation Solution
A cable duct design featuring a radially displaceable engagement part with an internal thread on the holding element, allowing quick height adjustments by shifting the engaging part along the threaded rod, and fine adjustments through rotational movement, with optional tool engagement for precise control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional threaded rods with slots are used for height adjustment, then the cable duct can be adjusted in height, but the adjustment process becomes time-consuming and cumbersome for long ducts with multiple support feet
Solution Approach 1:
The adjustment mechanism is segmented into two independent functions: a radially displaceable engagement part for quick coarse adjustment and a threaded rod for fine adjustment. This segmentation allows different adjustment speeds for different precision requirements, resolving the contradiction between adjustment ease and adjustment time.
Solution Approach 2:
The engagement part is designed to be radially displaceable relative to the threaded rod, allowing the adjustment mechanism to dynamically switch between two modes: quick radial displacement for coarse adjustment and rotational threading for fine adjustment. This dynamic capability enables efficient adjustment across the full height range.
2Manufacturing precision
If multiple support feet are adjusted individually using traditional methods, then each support foot can be positioned, but the process requires multiple adjustment passes and cannot be done simultaneously
Solution Approach 1:
The radially displaceable engagement part enables all support feet to be adjusted simultaneously in the radial direction for coarse positioning, dramatically increasing productivity. The threaded rod then allows individual fine-tuning of each support foot if needed, maintaining precision without requiring multiple adjustment passes.
3Reliability
If the engagement part is firmly connected to the threaded rod, then the connection is secure, but the engagement part cannot be radially displaced for quick adjustment
Solution Approach 1:
The engagement part is designed with a dynamic connection to the threaded rod: it can be radially displaced when force is applied for adjustment, but automatically locks in position when radial force is removed. This dynamic behavior provides both ease of adjustment and connection security without compromise.
Solution Approach 2:
The engagement part features self-locking capability through its radial displacement mechanism. When radially displaced for adjustment, it can be easily positioned; when released, it automatically engages with the threaded rod to secure the position, requiring no additional locking operations and maintaining reliability while enabling ease of operation.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables easy and quick height adjustments of long cable ducts with multiple support feet, allowing rough alignment and fine tuning without tools, ensuring secure locking at desired heights, even under load, facilitating installation on construction sites.
Implementation Method 1
a spring element, in particular a spiral spring, for prestressing the engaging part in the direction of the threaded rod
Implementation Method 2
a rotatably mounted threaded rod
Data Source
Figure 1~2
Figure 3~4
Figure 5~7
AI summary
The duct has a duct unit, and a support leg (10) for attaching on a building floor. The support leg has a rotatably supported threaded rod (14), a base plate (12) and a retaining element (16) connected with the duct unit. An engaging unit (18) moving axially to the threaded rod is provided at the retaining element. The engaging unit is provided with an inner thread at an end of the engaging unit, where the end faces the thread rod. The threaded rod is rotatably supported at the base plate, and is provided with a longitudinal guide (46) for engaging a tool.