Mechanical Coupling Decouples Drive Shaft for Manual Levering
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing levering-in systems for circuit breakers require significant manual force during manual operation and risk damage to motors or automatic drivetrains when attempting to manually lever-in devices, as they are not designed for decoupling from motorized systems.
Innovation Solution
A mechanical coupling assembly that decouples the drive shaft from the motor and gear train during manual operation, allowing for reduced manual force requirements and preventing damage by coupling and decoupling the drive shaft from the flange using a resilient member and sliding mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the motor and gear train remain attached to the drive shaft during manual levering-in operation, then the motorized system can continuously provide automated operation, but the manual operation requires excessive force and risks damage to the motor or drivetrain
Solution Approach 1:
The coupling device is divided into separate components: a coupling member attached to the drive shaft and a decoupling mechanism that can separate the motor/gear train from the drive shaft. This segmentation allows the manual operation interface to be isolated from the motorized components, enabling manual levering-in without transmitting excessive forces to the motor or drivetrain.
Solution Approach 2:
The coupling device acts as an intermediary between the motorized system and the manual operation interface. It includes a coupling member on the drive shaft and a decoupling mechanism that can engage or disengage the connection. This intermediary allows selective transmission of torque, protecting the motorized components during manual operation while maintaining continuous connection during automated operation.
2Ease of operation
If a mechanical coupling device is introduced to allow decoupling, then manual operation becomes easier and safer, but the device complexity increases
Solution Approach 1:
The decoupling function is extracted as a separate, dedicated mechanism rather than being integrated into the motor or gear train. The coupling device includes specific components (coupling member, decoupling mechanism) that can be independently operated to engage or disengage the connection between the motorized system and drive shaft, simplifying the overall design while enabling manual operation.
Solution Approach 2:
The coupling device is designed to be self-actuating through a manual decoupling mechanism that uses the existing manual operation forces to disengage the coupling. The mechanism automatically engages when the manual tool is removed, eliminating the need for separate actuators or complex control systems while still providing the necessary decoupling functionality.
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
Enables efficient manual levering-in operations with reduced force and protects motorized systems by disconnecting them from the drive shaft, allowing for safe and easy manual insertion of circuit breakers without damaging the motor or automatic drivetrain.
Implementation Method 1
A mechanical coupling assembly that decouples the drive shaft from the motor and gear train during manual operation, allowing for reduced manual force requirements and preventing damage by coupling and decoupling the drive shaft from the flange using a resilient member and sliding mechanism.
Data Source
Figure 1
Figure 2A~3C
Figure 4A~4B
AI summary
Levering-in systems (10), particularly suitable for electrical apparatus such as switchgears, have a motor (20) that can drive a drive shaft (25) during a powered operation and include a mechanical coupling assembly (60) that can physically disconnect or decouple the drive shaft (25) from a drivetrain coupled to the motor (20) to allow manual levering-in with a reduced user crank force and/or to inhibit damage to components of the motorized drive system.