Indexing Hinge With Toothed Element For Position Locking
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Solution Overview
Problem
Traditional hinges for small doors in electronic equipment cabinets and ventilation ducts allow free rotation, posing safety hazards and making it difficult to maintain desired positions, as they do not securely fix the door or panel without additional torque.
Innovation Solution
The indexing hinge system, comprising a two-arm hinge half and an axle hinge half with a projecting indexing element and a toothed indexing element, prevents free rotation by requiring additional torque to change positions, allowing selective positioning and resistance to airflow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a traditional hinge is used, then the door can rotate freely for easy opening and closing, but the door cannot be fixed at desired positions and poses safety hazards
Solution Approach 1:
The hinge transitions from a static free-rotation mechanism to a dynamic indexing mechanism that allows free rotation during operation but automatically locks at predetermined positions. The indexing element engages with the toothed element to provide discrete positioning while maintaining operational flexibility between positions.
Solution Approach 2:
An indexing element is introduced as an intermediary component between the moving door and the fixed support structure. This indexing element, with its projecting tip engaging the toothed indexing element, mediates the rotation to prevent free movement while allowing controlled positioning at specific angles.
2Reliability
If a hinge with indexing mechanism is used, then the door can be fixed at predetermined positions, but the structure becomes more complex
Solution Approach 1:
The indexing mechanism is segmented into two independent halves: a two-arm hinge half with a projecting indexing element and an axle hinge half with a toothed indexing element. This segmentation allows each component to be simple in itself while creating a functional indexing system when assembled, reducing the complexity of individual parts.
Solution Approach 2:
The indexing functionality is merged directly into the hinge arms themselves rather than being a separate mechanism. The projecting indexing element is integrated into the two-arm hinge half, and the toothed indexing element is integrated into the axle hinge half, combining the hinge function and indexing function into a unified structure.
3Ease of operation
If free rotation is allowed, then the door is easy to operate, but airflow cannot be controlled and safety hazards occur
Solution Approach 1:
The indexing mechanism applies preliminary anti-action by preventing rotation beyond predetermined positions. The projecting indexing element engages with the toothed indexing element to create mechanical stops that counteract any force attempting to rotate the door beyond the indexed positions, thereby controlling airflow and preventing safety hazards before they can occur.
Data Source
AI summary
An indexing hinge comprises a two arm hinge half and an axle hinge half. The two arm hinge half includes two hinge arms, a projecting indexing element disposed therebetween and a first mounting element. The axle hinge half includes two axles, each extending from a toothed indexing element, and a second mounting element. When the axle hinge half is connected to the two arm hinge half by interconnecting each axle with a respective hinge arm, the projecting indexing element abuts the toothed indexing element in such a way as to prevent rotation unless an additional rotational torque is applied. An electronic equipment enclosure installation comprises an electronic equipment enclosure and an indexing hinge.