Brush Vacuum Cleaner Torque Shutdown With Mechanical Switch Reset
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Solution Overview
Problem
Existing brush vacuum cleaners with a single motor for both fan and brush drive face complexity and high costs in ensuring stability and safety during overload conditions, requiring additional switches and extensive electronic controls.
Innovation Solution
A spring-loaded control element actuates an internal electrical switch, engaging or disengaging based on torque detection, allowing external mechanical control for overload shutdown, simplifying the system with a mechanical switching facility and reducing electronic complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If electronic shutdown devices with microcontrollers and torque measurement are used, then reliability of overload protection is improved, but device complexity and cost increase
Solution Approach 1:
The patent replaces complex electronic control systems with a mechanical overload protection mechanism. A spring-loaded control element with a releasing element mechanically detects torque overload and directly actuates the electrical switch without requiring microcontrollers, torque sensors, or complex electronic evaluation circuits. This mechanical substitution maintains reliability while dramatically reducing device complexity and cost.
Solution Approach 2:
The mechanical overload protection system is self-actuating through the spring-loaded control element that automatically releases when torque exceeds the spring's holding force. The system serves itself by using the overload torque directly to trigger the release mechanism, eliminating the need for external electronic monitoring and control systems.
2Reliability
If additional switches and electronic controls are added for overload protection, then safety during overload is improved, but ease of manufacture deteriorates
Solution Approach 1:
The patent merges the overload protection function with the existing electrical switch mechanism. The spring-loaded control element is integrated into the switch assembly, combining the switching function and overload protection function into a single compact unit. This eliminates the need for separate additional switches and electronic control components, simplifying manufacturing while maintaining safety.
Solution Approach 2:
The electrical switch serves multiple functions: normal operation switching and overload protection. The spring-loaded control element enables the switch to automatically respond to overload conditions, making the switch a multi-functional component that eliminates the need for dedicated overload protection devices.
3Ease of operation
If a mechanical switching facility is implemented, then ease of operation is improved, but device complexity increases
Solution Approach 1:
The spring-loaded control element acts as an intermediary between the overload torque and the electrical switch. It translates the mechanical torque overload into a controlled release action that actuates the switch. This intermediary mechanism provides external control capability while maintaining simplicity through its straightforward spring-based design.
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 solution enables a cost-effective and reliable mechanical switching mechanism for overload protection in brush vacuum cleaners, allowing independent external control of the electrical switch and reducing the need for complex electronic controls.
Implementation Method 1
a movable spring-loaded control element actuates an electrical switch
Data Source
AI summary
A brush vacuum cleaner having a safety shutdown of the drive via an overload brush roller torque detection. A mechanical triggering element via transmission elements actuates an electrical switch for the main switch to shut down the drive above a torque threshold. The switch is additionally connected in parallel by an external actuating element to an on and off position by a spring-loaded control element and a coupling element. Due to the control element, switching the switch into an off position due to overload is transmitted to the actuating element that can be adjusted into an off position. The control element is spring held in the on position in an arrangement for the engagement of the control element, where an unlocking can be set as off position by adjustment of the control element via the actuating element against the spring pressure.