Electric Actuator Rotation Sensor Outer Case Integration
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Solution Overview
Problem
The existing rotary actuators face challenges in securing sufficient space and efficiently connecting rotation sensors to wiring members, leading to increased time and effort, which hampers productivity.
Innovation Solution
An electric actuator design that includes a motor with a speed reduction mechanism, a case with a first concave part on its outer surface, and a rotation detector with a wiring member connected to the rotation sensor, allowing the wiring member to protrude and connect with the sensor outside the case, simplifying the connection process and improving productivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the rotation sensor is disposed inside the case, then the rotation detection function is integrated, but sufficient space for connecting the terminal to the wiring member cannot be secured and the connection operation becomes difficult
Solution Approach 1:
The case is divided into an inner case and an outer case, creating a segmented structure. The rotation sensor is disposed in the inner case while the wiring member connection is facilitated through the outer case, separating the sensor integration function from the wiring connection operation.
Solution Approach 2:
The inner case is nested within the outer case, forming a nested structure. The rotation sensor is disposed inside the inner case, while the outer case provides access space for wiring member connection, allowing both functions to coexist without interference.
2Volume of moving object
If the rotation sensor is disposed inside the case, then the structure is compact, but it takes a large amount of time and effort to dispose the rotation sensor
Solution Approach 1:
The case is segmented into inner and outer cases, allowing the rotation sensor to be disposed in the inner case independently. This segmentation enables more efficient assembly operations despite the compact structure, reducing the time and effort required to dispose the rotation sensor.
3Reliability
If the wiring member is connected inside the case, then the electrical connection is established, but sufficient space for the connection operation is difficult to secure
Solution Approach 1:
The case is segmented into inner and outer cases, with the wiring member connection performed in the outer case rather than inside the inner case. This segmentation provides sufficient space for the connection operation while maintaining reliable electrical connection between the rotation sensor and external wiring.
Solution Approach 2:
The outer case acts as an intermediary space that facilitates the connection between the wiring member and the rotation sensor. It provides the necessary working space for connection operations while maintaining the compact inner case structure for sensor disposal.
Data Source
AI summary
One aspect of an electric actuator of the disclosure includes: a motor having a motor shaft rotating about a central axis; a speed reduction mechanism connected to a portion on one side in an axial direction of the motor shaft; a case accommodating the motor and the speed reduction mechanism; an output part to which rotation of the motor shaft is transmitted via the speed reduction mechanism; a rotation detector having a rotation sensor detecting rotation of the output part; and a wiring member electrically connected with the rotation sensor. The case has a first concave part located on an outer surface of the case. One end part of the wiring member penetrates the case from inside the case and protrudes inside the first concave part. The rotation sensor is located inside the first concave part and connected with one end part of the wiring member.