Chain Lock Tensile Force Distribution via Segmented Housing
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Solution Overview
Problem
Chain locks face challenges in withstanding high tensile stresses during break-open attempts due to complex and expensive component structures required for their combination locking mechanisms.
Innovation Solution
A chain lock design featuring a lock body with rotatable code setting rings, a housing sleeve, and fastening pins that distribute tensile forces, allowing for a simple and inexpensive manufacture while providing high resistance to break-open attempts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If complex components are used for the combination locking mechanism to ensure stability against tensile stresses, then the resistance to break-open attempts is improved, but the manufacturing cost and complexity increase
Solution Approach 1:
The lock body is divided into multiple closure parts (first closure part and second closure part) that are connected through the housing sleeve. This segmentation allows the tensile forces to be distributed across multiple components rather than concentrated in a single complex structure, reducing the complexity of individual parts while maintaining overall stability.
Solution Approach 2:
The housing sleeve combines multiple functions: it connects the first and second closure parts, provides structural support for the combination locking mechanism, and serves as a pathway for force transmission. This merging of functions into a single component reduces the total number of parts needed while maintaining reliability.
2Reliability
If complex components are used for the combination locking mechanism to ensure stability against tensile stresses, then the resistance to break-open attempts is improved, but the manufacturing cost increases
Solution Approach 1:
By segmenting the lock body into multiple simpler closure parts connected through the housing sleeve, each component can be manufactured more easily and at lower cost using standard manufacturing processes, while the assembled structure provides the required resistance to break-open attempts.
Solution Approach 2:
The housing sleeve serves multiple functions (structural connection, force transmission, mechanism support), which reduces the need for additional specialized components. This multi-functionality simplifies the overall manufacturing process and reduces costs while maintaining the required reliability.
3Adaptability or versatility
If the chain connection part and bolt are aligned coaxially, then the adaptability to different securing situations is improved, but the structural complexity increases
Solution Approach 1:
The chain connection part is designed to be rotatable relative to the lock body around the lock axis, allowing the chain to adapt to different securing situations and orientations. This dynamic capability provides versatility without requiring complex adjustable mechanisms, as the rotation is achieved through simple bearing support.
Data Source
AI summary
A chain lock includes a lock body having a first closure part, a second closure part, and a combination locking mechanism that is aligned along a lock axis. The chain lock having a bolt selectively locked to the lock body by the combination locking mechanism. The lock body has a chain connection part permanently connected to the bolt via a chain. The combination locking mechanism having a plurality of rotatable code setting rings arranged between the first and second closure parts. At a first end the lock body has at least one first fastening pin that engages through the housing sleeve into an annular groove of the chain connection part. At a second end the lock body has at least one second fastening pin that engages through the housing sleeve into the second closure part of the lock body and that fixes the second closure part to the housing sleeve.