Servo Output Shaft Abnormal Rotation Prevention
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Solution Overview
Problem
Existing servos in robots suffer from excessive play in the transmission mechanism, leading to unnecessary motion and shaking of robot limbs due to gaps between engaged gear teeth, which affects the accuracy and stability of robotic movements.
Innovation Solution
Incorporating an annular member, such as an annular washer or speed reducing ring, between the servo output shaft and the housing to limit abnormal rotation through frictional force, thereby reducing or eliminating shaking caused by excessive play in the gear transmission mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a gear transmission mechanism is used in the servo, then power transmission is achieved, but excessive play and shaking occur due to gaps between engaged gear teeth
Solution Approach 1:
A damping member is introduced as an intermediary component between the output shaft and the housing. This damping member absorbs the excessive play and vibrations generated by the gear transmission mechanism, preventing them from being transmitted to the output shaft. The damping member acts as a mediator that isolates the output shaft from the harmful effects of gear meshing gaps, thereby maintaining stable output position while preserving power transmission capability.
2Device complexity
If the servo structure is simplified without additional components, then device complexity is reduced, but abnormal rotation of the output shaft cannot be prevented
Solution Approach 1:
The damping member is designed to perform multiple functions simultaneously: it provides damping to reduce excessive play, prevents abnormal rotation of the output shaft, and can also serve as a structural support element. By integrating these multiple functions into a single component, the design avoids adding excessive complexity while achieving reliable prevention of abnormal rotation and stabilization of the output shaft position.
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
The frictional force-based mechanism effectively reduces or avoids shaking of robot limbs by stabilizing the servo output shaft, enhancing the accuracy and stability of robotic movements by minimizing abnormal position changes.
Implementation Method 1
The annular member is used to limit an abnormal rotation of the servo output shaft through frictional force
Data Source
AI summary
A servo assembly includes a housing, a motor, a control circuit board and a gear transmission mechanism that are arranged in the housing. The motor is electrically connected with the control circuit board. The gear transmission mechanism is rotatably connected with a motor output shaft of the motor and the servo output shaft. A servo output shaft has one end that is received in the housing and located above the control circuit board and an opposite end that extends out of the housing. A servo plate is connected to the end of the servo output shaft which is away from the control circuit board. The servo plate includes a connecting portion connected with the servo output shaft. An annular member is disposed between an end surface of the connecting portion and the housing, and the annular member is used to limit an abnormal rotation of the servo output shaft.