Actuator Switch Layout for Rod Tilt Error Tolerance
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Solution Overview
Problem
Existing actuators for electric vehicle chargers face challenges in maintaining stability and reliability due to erroneous switch operations caused by changes in the rod's posture resulting from external forces, leading to charging errors and safety risks.
Innovation Solution
The actuator design includes a safety switch driving section where the contact protrusion can move relative to the switch while maintaining the electric circuit connection, minimizing erroneous operations and ensuring accurate detection of the rod's operating position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the rod is allowed to move freely in response to external forces, then the actuator can adapt to external interference, but the switch erroneously operates due to rod posture changes
Solution Approach 1:
The switch driving section is divided into a normal section and a safety section. The safety section is specifically designed to accommodate rod posture changes without causing switch errors, while the normal section maintains precise switch operation for accurate position detection.
Solution Approach 2:
The safety section acts as an intermediary zone between the rod and the switch. It absorbs the impact of rod tilting and posture changes, preventing these movements from directly affecting the switch's electrical contact and causing erroneous operations.
2Measurement precision
If the switch is highly sensitive to rod position, then accurate operating position detection is achieved, but erroneous operations occur due to rod tilting
Solution Approach 1:
The switch driving section is segmented into a normal section for precise position detection and a safety section for error prevention. This segmentation allows the system to maintain high measurement precision while avoiding erroneous operations caused by rod tilting.
Solution Approach 2:
Different sections of the switch driving path are given different functional qualities. The normal section has precise geometric tolerance for accurate detection, while the safety section has increased tolerance to accommodate posture changes without causing errors.
3Adaptability or versatility
If the rod movement range is increased to accommodate external forces, then adaptability improves, but switch detection accuracy decreases
Solution Approach 1:
The rod's movement range is segmented into a normal operating range for precise detection and an extended safety range for accommodating external forces. The safety section of the switch driving section corresponds to this extended range and is designed to prevent errors even when the rod is in this less precise zone.
4Adaptability or versatility
If the switch driving section is extended to allow rod movement, then adaptability to external force improves, but the risk of erroneous operation increases
Solution Approach 1:
The switch driving section is segmented into a normal section where precise switch operation is maintained and an extended safety section that accommodates rod movement due to external forces. The safety section is specifically designed with features that prevent erroneous operations even when the rod is in this extended position.
Solution Approach 2:
The safety section serves as an intermediary zone that allows the rod to move in response to external forces without directly affecting the switch's electrical contact. This intermediary zone absorbs the disturbance and prevents it from causing erroneous operations.
Data Source
AI summary
An actuator includes a housing, a gear part rotatably provided on the housing, a rod having a contact protrusion and configured to be movable upward or downward relative to the housing depending on a rotation of the gear part, and a switch provided in the housing and configured to define an electric circuit electrically connected to a switch resistor, the switch being configured to connect or disconnect (ON/OFF) the electric circuit depending on contact of the contact protrusion, the switch including a safety switch driving section in which a state in which a movement of the contact protrusion relative to the switch is allowed and the electric circuit is connected (ON) is maintained, and the switch and the contact protrusion positioned adjacent to each other so that the movement of the contact protrusion relative to the switch is performed in the safety switch driving section, thereby improving stability and reliability.