Flameproof Actuator Handle with Transformation Gear
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Solution Overview
Problem
Existing solutions for actuating on/off levers in potentially explosive areas within flameproof housings require direct mechanical linkage, which can compromise the integrity of the explosion-proof design, and lack adaptability to different lever dimensions and shapes.
Innovation Solution
A rotatably mounted handle outside the housing connected to a shaft with a transformation gear that converts rotational motion into linear motion for the on/off lever, using a gear wheel and gear rod portion with a sliding member and exchangeable lever insert, ensuring mechanical actuation without electrical connections and accommodating various lever dimensions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a direct mechanical linkage is used to actuate the on/off lever from outside the housing, then the actuation function is achieved, but the integrity of the explosion-proof design is compromised
Solution Approach 1:
The actuating device is segmented into an external rotary handle portion and an internal linear actuator portion, connected through a transformation gear mechanism. This segmentation allows the external rotary motion to be converted into internal linear motion without direct penetration, maintaining the flameproof housing integrity while achieving actuation functionality.
Solution Approach 2:
The transformation gear mechanism acts as an intermediary between the external handle and the internal on/off lever. It converts rotational motion to linear motion through gear wheel and gear rod engagement, enabling actuation without direct mechanical linkage through the housing wall, thus preserving explosion-proof integrity.
2Reliability
If a fixed mechanical linkage is used, then the actuation is reliable, but adaptability to different lever dimensions and shapes is lost
Solution Approach 1:
The actuating device incorporates a sliding member with a slot that can accommodate levers of different dimensions and shapes. The sliding member moves linearly within guided slots, dynamically adjusting its position to engage with various lever configurations while maintaining reliable actuation through the transformation gear mechanism.
Solution Approach 2:
The transformation gear mechanism with sliding member is designed to be universal, capable of actuating different types of on/off levers through standardized engagement interfaces. The gear rod portion can engage with various lever shapes via the sliding member's slot, providing multi-functionality without sacrificing actuation reliability.
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 mechanical actuation of on/off levers in flameproof housings without compromising explosion protection, allowing for easy adaptation to different lever designs and preventing inadvertent actuation through a locking mechanism, while maintaining the integrity of the flameproof housing.
Implementation Method 1
A simple example of such a transformation gear comprises at least one gear wheel rotationally connected to the shaft and a gear rod portion being in engagement with its gearing and being connected movably to the on / off lever. When rotating the shaft, the gear wheel rotates along and the rotation is transformed into linear motion of the gear rod portion by means of the engagement with the gear rod portion
Data Source
AI summary
An actuating device is proposed for an electric / electronic device within an in particular flame-proof housing, said electrical / electronic device comprising an essentially linearly movable on / off lever. In order to provide such an actuating device being accessible on the exterior of the respective flameproof housing and allowing mechanical actuation of the respective on / off lever without adversely affecting the flameproof housing, the actuating device comprises at least a rotatably mounted handle disposed on the outside of the housing and a shaft connected with it in a rotatably fixed manner, said shaft being guided into the housing interior and there being connected movably to the on / off lever by means of a transformation gear for transforming rotational motion into linear motion.