Detachable Chain Link Structure With Constant Cross-Section Strength
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Solution Overview
Problem
Existing chain link connections using threaded screws are expensive to manufacture and weaken the tensile strength due to a reduced screw diameter, compromising the reliability of the connection between chain links.
Innovation Solution
A connecting chain link design featuring a main element and a connecting element that engage to form a closed shape with a constant nominal cross-section, eliminating the need for threaded screws and enhancing tensile strength by matching the cross-sectional area of the connecting element with the main element, thereby simplifying production and improving connection reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If threaded screws are used to close the open region of the connecting link, then the connection is secured, but the manufacturing cost increases and the tensile strength decreases
Solution Approach 1:
The connecting link is divided into a main element and a connecting element that can be separately manufactured and then assembled. The main element forms the C-shape structure while the connecting element closes the open region, allowing each part to be optimized independently for strength and manufacturing efficiency.
Solution Approach 2:
The main element and connecting element are merged through engagement features (such as protrusions and recesses or welding) to form a unified closed loop structure. This merging creates a continuous load path that maintains constant nominal cross-section throughout, eliminating the weak point at the screw connection.
2Reliability
If threaded screws are used to close the open region of the connecting link, then the connection is secured, but the manufacturing complexity and cost increase
Solution Approach 1:
The connecting link is divided into a main element and a connecting element that can be separately manufactured using simpler processes such as bending and forming, avoiding the need for threaded holes and screw fastening operations.
Solution Approach 2:
The main element and connecting element are merged through simple engagement features or welding processes that are easier and more cost-effective than threading operations, reducing manufacturing complexity while maintaining connection security.
3Ease of operation
If the diameter of the threaded screw is reduced to enable screwing into the connecting link, then the screw can be installed, but the tensile strength of the connection is compromised
Solution Approach 1:
The connecting link is segmented into elements that can be joined without requiring reduced-diameter fasteners, allowing the full nominal cross-section to be maintained throughout the structure for optimal tensile strength.
Solution Approach 2:
The main element and connecting element are merged in a way that creates a continuous structure with constant nominal cross-section, eliminating the need for reduced-diameter screws and maintaining uniform strength throughout the connecting link.
Data Source
AI summary
Connecting chain link (1) for purposes of connecting at least two chain links of a chain, wherein the connecting chain link (1) is configured and equipped so as to establish an articulated and detachable connection between two chain links, wherein the connecting chain link (1) has a main element (2) and a connecting element (3), wherein the main element (2) has a first nominal cross-section (D1) at least in some sections, whereinthe connecting element (3) can be inserted into an open section of the main element (2) along a direction of insertion (E), wherein a contact section (3a) of the connecting element (3) engages with a mating contact section (3a) of the main element (3), which is designed to correspond to the contact section (3a), wherein a connecting section (4) of the connecting chain link (1) has a second nominal cross-section (D2), which is essentially the same size as the first nominal cross-section (D1).