Electric Switch Modular Design with Gearless Shaft Linkage
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Solution Overview
Problem
Existing electric current switching apparatuses face challenges in achieving a less complex structure, ease of assembly, secure operation, fast contact switching, and efficient arc quenching during opening, with existing designs often requiring complex mechanisms and external gear devices.
Innovation Solution
The design incorporates a modular structure comprising a mechanism module and a contact module with a plastic housing, allowing for easy assembly and operation without external gear devices, using a mechanism with a front pipeshaft, inner pipeshaft, and lever to control the switch, and featuring a roll with moving and fixed contacts for efficient switching and arc quenching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If external gear devices are used to control the switch, then the switching mechanism can be controlled, but the device complexity increases
Solution Approach 1:
The patent removes external gear devices from the switching mechanism, extracting the unnecessary complex components while retaining the essential switching function through a simplified direct mechanical linkage system
Solution Approach 2:
Instead of using complex external gear devices to transmit and control switching motions, the patent inverts the approach by using a simplified direct mechanical linkage where the operating element directly controls the contacts without intermediate gear mechanisms
2Ease of manufacture
If a modular structure with plastic housing is used, then ease of assembly is improved, but manufacturing precision requirements increase
Solution Approach 1:
The patent divides the switch into separate modular components (mechanism module and contact module) with plastic housings that can be assembled together, allowing each module to be manufactured and tested independently before final assembly
Solution Approach 2:
The plastic housing modules are designed with universal features that allow them to accommodate different switching configurations and contact arrangements, reducing the need for precision-critical custom fittings for each variant
3Device complexity
If the switch structure is simplified, then device complexity is reduced, but arc quenching efficiency may worsen
Solution Approach 1:
The patent converts the potentially harmful arc into a beneficial effect by using the arc's own plasma channel to ionize and prepare the medium for more efficient current interruption, while the simplified structure maintains adequate quenching capability through optimized contact geometry and spacing
Data Source
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AI summary
An electric switch (1) comprising a mechanism module (2) and a contact module (3), the contact module comprising a base element (46), a cover element (47), fixed contacts (41) and a rotary roll (39) for receiving moving contacts (40), the mechanism module comprising a base element (5), a cover element (6), a front pipeshaft (9) for controlling the switch from front, an inner pipeshaft (12) for controlling the switch from side end, the pipeshafts (9, 12) being engaged to each other by teeth (19, 22) to form a gear for transferring a moment from the front pipeshaft to the inner pipeshaft, a lever (13) for transferring a moment to the roll, the lever arranged to receive the inner pipeshaft, the inner pipeshaft and the lever being rotatable engaged with each other, and main springs (14) for giving a rotational moment for the lever and being connected of first ends (49) to the base element and the main springs being connected to the lever of their second ends (50).