Drawbar Socket Microswitch for Shunting Drive Detection
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Solution Overview
Problem
Existing shunting drives for trailers struggle to reliably detect the separation of the drawbar plug from the tractor due to issues with contact difficulties or circuit interruptions, leading to incorrect activation or deactivation of the maneuvering drive.
Innovation Solution
A mechanical microswitch sensor is integrated into the drawbar socket to directly and reliably detect the presence of the towbar plug, independent of contact issues or circuit interruptions, ensuring accurate detection of the plug's position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If indirect detection via lighting circuit contacts is used to detect drawbar plug presence, then the system can detect plug insertion, but the detection reliability deteriorates due to contact difficulties or circuit interruptions
Solution Approach 1:
The patent extracts the detection function from the lighting circuit contacts and implements it through a dedicated mechanical sensor (microswitch) integrated into the drawbar socket. This separates the detection mechanism from the lighting circuit, eliminating contact reliability issues while maintaining system simplicity.
Solution Approach 2:
The patent introduces a mechanical intermediary (microswitch sensor) that directly detects the physical presence of the drawbar plug through mechanical contact. This intermediary provides reliable detection independent of the lighting circuit's electrical contacts, solving the reliability problem without adding complex electronic systems.
2Reliability
If a mechanical microswitch sensor is integrated into the drawbar socket to directly detect plug presence, then detection reliability improves, but device complexity increases
Solution Approach 1:
The patent merges the detection sensor directly into the drawbar socket structure, combining two previously separate components (socket and sensor) into a single integrated unit. This reduces overall device complexity while achieving reliable detection, as the sensor becomes an inherent part of the socket assembly rather than a separate addition.
Data Source
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AI summary
The pole socket (40) has a sensor (48) for detecting that whether a shaft connector (42) is plugged into the pole socket. The sensor is run as a mechanical switch. The switch is a micro switch. An independent claim is included for a shunting drive with a central unit.