Spring Actuator Torsion Spring Integration
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Solution Overview
Problem
Conventional spring-operated actuators for electrical switching apparatuses require complex and reliable connections for torsion springs, which complicate assembly and increase the risk of malfunction, especially due to the need for strong connection means to handle sudden high actuation forces.
Innovation Solution
The use of torsion springs arranged to store energy in the unwinding direction and discharge it in the winding direction simplifies the connection to support and drive shafts, eliminating the need for additional connection means and reducing the number of components required, allowing for a more compact and reliable design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional torsion springs are used with secure connections to support and drive shaft, then the actuator can withstand high actuation forces, but the assembly becomes complex and requires additional connection means
Solution Approach 1:
The patent merges the spring end and the drive shaft into a single integrated component. The torsion spring's end is formed as an extension of the drive shaft itself, eliminating the need for separate connection means such as pins, bolts, or welds. This integration maintains the strength required to withstand high actuation forces while significantly reducing assembly complexity and the number of components.
Solution Approach 2:
The drive shaft serves a dual function: it acts as both the driving component and the connection element for the torsion spring. The shaft's own structure provides the mounting surface and connection interface, making the system self-sufficient without requiring external connection components. This self-service approach simplifies the overall assembly while maintaining structural integrity.
2Reliability
If secure connection means are used for torsion spring ends, then reliability of force transmission is improved, but the number of components and assembly steps increases
Solution Approach 1:
The connection interface is created by merging the spring end formation with the drive shaft structure. The shaft includes an integrated formation that directly engages with the torsion spring end, ensuring reliable force transmission through a unified structural element rather than through separate connected components. This eliminates potential failure points at connection interfaces while reducing the total component count.
3Force
If conventional spring mounting is used, then the actuator can handle sudden high forces, but the assembly and maintenance become more difficult
Solution Approach 1:
The drive shaft's integrated formation automatically provides the mounting function without requiring separate mounting operations. The torsion spring is directly formed onto the shaft, creating an inherent mounting structure that simplifies both assembly (no separate mounting steps) and maintenance (easier access and replacement). The design handles sudden high forces through the robust integrated structure while improving operational ease.
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
This arrangement simplifies the assembly and maintenance of the actuator, reduces the risk of malfunction, and results in a more cost-effective and reliable spring-operated actuator with a compact construction suitable for high-voltage applications.
Implementation Method 1
a torsion spring defining a winding direction and an unwinding direction thereof and being arranged to be charged with, to store and to discharge mechanical energy
Data Source
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AI summary
The invention relates to a spring operated actuator for an electrical switching apparatus. It has an opening spring means and a closing spring means, at least one of them including a torsion spring (3, 4). According to the invention the torsion spring (3, 4) is charged in the unwinding direction and discharged in the winding direction.