Electric Actuator Rotation Detection Wiring Simplification
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Solution Overview
Problem
Existing electric actuators face challenges in accurately detecting the rotational position of the output shaft of a speed reducer due to complications in wiring and increased labor and manufacturing costs, especially when a separate detector is used to detect the rotational position of the output shaft.
Innovation Solution
An electric actuator design that incorporates a rotation detection device within the speed reduction mechanism case, with a connector system allowing for indirect electrical connection to the motor case, reducing the need for complex wiring and simplifying assembly by overlapping the cases' connecting portions for electrical connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a separate detector is provided to detect the rotational position of the output shaft, then the detection accuracy is improved, but the wiring becomes complicated and assembly labor increases
Solution Approach 1:
The rotation detection device is integrated into the speed reduction mechanism case, merging the detection function with the existing structural component. This eliminates the need for separate wiring routes and reduces assembly complexity while maintaining detection accuracy
Solution Approach 2:
The speed reduction mechanism case serves as an intermediary structure that houses the rotation detection device and provides electrical connection pathways. This mediator role simplifies the overall wiring architecture by using the existing case structure as both mechanical support and electrical conduit
2Measurement precision
If a separate detector is provided to detect the rotational position of the output shaft, then the detection accuracy is improved, but assembly labor and manufacturing cost increase
Solution Approach 1:
The rotation detection device is combined with the speed reduction mechanism case, allowing simultaneous assembly of the case and detection device. This integration reduces the number of separate assembly operations and lowers manufacturing costs while achieving accurate rotational position detection
3Adaptability or versatility
If the detector is disposed away from the electric motor to detect the output shaft rotation, then the detection function is improved, but the wiring member routing becomes complicated
Solution Approach 1:
The speed reduction mechanism case acts as an intermediary that provides built-in wiring pathways from the output shaft detection point to the electrical wiring outside the case. This eliminates the need for complex external routing while enabling the detector to be positioned optimally for detection function
Data Source
AI summary
An electric actuator includes a motor, a speed reduction mechanism, a case, an output portion, a first board, a rotation detection device that detects rotation of the output portion, a connector portion, a first wiring member electrically connected to electrical wiring via the connector portion, and a second wiring member electrically connected to the rotation detection device. The case includes a first case and a second case. The first board is accommodated in the first case. The rotation detection device is accommodated in the second case. The first wiring member includes a first connecting portion held in the first case. The second wiring member includes a second connecting portion held in the second case. The first connecting portion is exposed on one side in the axial direction of the first case. The second connecting portion is exposed on the other side in the axial direction of the second case.