Torsion Spring Assembly for Low-Complexity Switch Operation
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Solution Overview
Problem
Existing switching apparatuses, such as disconnectors and earthing switches, rely on complex compression spring and dead weight assemblies that are bulky, require high skill for assembly, and are not suitable for lower voltage ratings, leading to increased costs and assembly challenges.
Innovation Solution
A torsion spring assembly is introduced, comprising at least one torsion spring arranged around a pivot shaft to pivot a movable arm between closed and open positions, with the torsion spring connected to the pivot shaft and a base structure, allowing for easy assembly and reduced energy requirements, and featuring a stopper plate to maintain the spring's position, facilitating the assembly and operation of switching apparatuses at various voltage ratings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a compression spring assembly is used to provide torque for operating the disconnector, then the torque requirement is met, but the assembly becomes bulky and requires high-skill assembly
Solution Approach 1:
The compression spring assembly is divided into multiple compression springs arranged in parallel around the pivot shaft. Each spring independently contributes to the torque, allowing the system to meet torque requirements while using simpler, smaller individual components that are easier to assemble
Solution Approach 2:
The multiple compression springs serve dual functions: collectively providing the required torque for operating the disconnector and individually supporting portions of the movable arm's dead weight. This multi-functionality reduces the need for separate dead weight assemblies
2Weight of moving object
If a dead weight assembly is used to support the movable arm, then the dead weight is supported, but the assembly becomes very heavy and bulky
Solution Approach 1:
The compression springs are designed to perform multiple functions simultaneously: providing operational torque for the disconnector and supporting portions of the movable arm's dead weight. This eliminates or reduces the need for a separate dead weight assembly, significantly reducing overall assembly weight
Solution Approach 2:
The spring constants and dimensions of the compression springs are optimized to provide both sufficient torque and adequate dead weight support. By adjusting spring parameters, the system achieves dual functionality without requiring additional heavy components
3Force
If a compression spring assembly designed for higher voltage rating is used, then the torque requirement for higher voltage is met, but it is not suitable for lower voltage rating with less torque requirement
Solution Approach 1:
The use of multiple independent compression springs allows for flexible configuration. For higher voltage applications, more springs or stronger springs are used to provide greater torque. For lower voltage applications, fewer springs or weaker springs are used, providing the appropriate torque level. This modular approach enables the same basic assembly design to adapt to different voltage ratings
Solution Approach 2:
The system allows dynamic adjustment of torque characteristics by varying the number, size, or spring constant of the compression springs based on the specific voltage rating and torque requirements. This makes the assembly versatile across different application scenarios
4Force
If multiple components are used in the spring assembly, then the torque and support functions are achieved, but the assembly cost increases
Solution Approach 1:
The functions of torque provision and dead weight support are merged into a single component system - the compression springs. This eliminates the need for separate dead weight assemblies and reduces the total number of components, thereby reducing assembly complexity and cost while achieving both functional requirements
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
The torsion spring assembly simplifies the assembly process, reduces costs, and is suitable for both higher and lower voltage ratings, providing a cost-effective and efficient solution for switching apparatuses by supporting and balancing the dead weight of the movable arm, thereby reducing energy requirements.
Implementation Method 1
a torsion spring assembly for a switching apparatus. The torsion spring assembly comprises at least one torsion spring configured to be arranged around a pivot shaft for pivoting at least one movable arm between a closed position in which a current path is closed and an open position in which the current path is open
Data Source
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AI summary
The invention relates to a torsion spring assembly for a switching apparatus (90, 80). The torsion spring assembly comprises at least one torsion spring (12a, 12b, 12c) configured to be arranged around a pivot shaft (18, 20) for pivoting at least one movable arm (60, 50) between a closed position in which a current path is closed, and an open position in which the current path is open. The at least one torsion spring (12a, 12b, 12c) is configured to be connected to the pivot shaft (18, 20) at a first end, and to a base structure (22, 24) supporting the pivot shaft (18, 20) at a second end.