Temperature-Dependent Switch Assembly for Vibration-Robust Contacts
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Solution Overview
Problem
Temperature-dependent switches with series-connected spring and switching elements face challenges in mechanical stability and manufacturing complexity due to fragile components, leading to low robustness against vibrations and difficulties in automated assembly.
Innovation Solution
Incorporating a dimensionally stable connecting component between the spring element and the temperature-dependent switching element, which is attached to both and provides additional mechanical stability and simplifies manufacturing by allowing automated assembly on a conveyor belt.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a series-connected switching mechanism with spring element and temperature-dependent switching element is used, then the switching function is achieved, but the mechanical stability deteriorates due to fragile components
Solution Approach 1:
The switching mechanism is divided into separate components (spring element, connecting element, temperature-dependent switching element) that are attached to each other, allowing each component to be optimized for its specific function while reducing overall fragility
Solution Approach 2:
A connecting element is introduced as an intermediary component between the spring element and the temperature-dependent switching element. This connecting element strengthens the mechanical connection and reduces fragility while maintaining the series electrical connection and thermal coupling
2Ease of operation
If fragile components are directly connected in series, then the switching mechanism functions, but the robustness against vibrations deteriorates
Solution Approach 1:
The connecting element is designed to compensate for thermal expansion and mechanical stress before they can cause damage to the fragile components, providing protection against vibrations and thermal shocks that occur during operation
3Reliability
If fragile components are used for the switching mechanism, then the switching function is achieved, but the manufacturing complexity increases due to difficulties in automated assembly
Solution Approach 1:
The connecting element is prepared in advance with attachment surfaces and geometry that facilitate automated assembly processes, allowing the spring element and temperature-dependent switching element to be reliably connected in series using automated manufacturing techniques
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 solution enhances the mechanical stability and manufacturing ease of the switching mechanism, enabling a more reliable and cost-effective temperature-dependent switch with improved robustness and reduced risk of arcing during operation.
Implementation Method 1
a temperature-dependent switching element (28) which is configured to change its geometric shape as a function of its temperature
Implementation Method 2
this temperature-dependent switching element is a bimetallic or trimetallic element that is designed as a multi-layer, active, sheet metal component that consists of two, three or more interconnected components with different thermal expansion coefficients
Data Source
AI summary
A temperature-dependent switch having a first external terminal, a second external terminal and a temperature-dependent switching mechanism. The temperature-dependent switching mechanism comprises a temperature-dependent switching element which is configured to change its geometric shape as a function of its temperature in order to switch the switching mechanism between a closed position, in which the switching mechanism establishes an electrically conductive connection between the first external terminal and the second external terminal, and an open position, in which the switching mechanism disconnects the electrically conductive connection. The temperature-dependent switching mechanism comprises a spring element which is permanently electrically and mechanically connected in series to the temperature-dependent switching element. The temperature-dependent switching mechanism also comprises a connecting component, which is arranged between the spring element and the temperature-dependent switching element and is attached to the spring element and the temperature-dependent switching element.