Desktop Robotic Arm Servo Drive Structure for Industrial Load Handling
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Solution Overview
Problem
Existing desktop robotic arms are unsuitable for industrial applications due to their inability to handle heavy loads and lack of control accuracy, as they typically use stepping motors that are not powerful enough for tasks such as visual sorting and assembly line handling.
Innovation Solution
The drive structure of the desktop robotic arm employs servo motors with absolute value encoders for the turntable, upper arm, and forearm, along with a staggered arrangement of components to reduce height and improve stability, and incorporates deceleration assemblies and electromagnetic contracting brakes for enhanced control and power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If stepping motors are used for the turntable, upper arm, and forearm drive, then the robotic arm has small size and low cost, but it cannot handle heavy loads and lacks control accuracy for industrial applications
Solution Approach 1:
The patent changes the motor type parameter from stepping motors to servo motors, which fundamentally alters the driving capability and control precision. This parameter change enables the robotic arm to handle heavy loads (up to 2kg) and achieve industrial-grade control accuracy while maintaining a compact desktop form factor.
2Measurement precision
If servo motors with absolute value encoders are used, then control accuracy and driving power are enhanced, but device complexity increases
Solution Approach 1:
The patent employs identical servo motors with absolute value encoders for all three drive systems (turntable, upper arm, and forearm). This universal approach simplifies the overall system architecture by using standardized components across different functions, reducing the complexity that would arise from mixing different motor types while still achieving high control accuracy and driving power.
3Length of stationary object
If components are arranged to reduce height, then the robotic arm becomes more compact, but stability may be compromised
Solution Approach 1:
The patent adopts a staggered arrangement where the turntable, upper arm, and forearm are positioned at different vertical levels rather than stacking them vertically. This dimensional redistribution reduces the overall height while maintaining structural stability by distributing the center of gravity and load paths across multiple levels, preventing the instability that would result from compact vertical stacking.
Data Source
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AI summary
The present invention discloses a drive structure of a desktop robotic arm, including a base and a turntable. The base is internally provided with a turntable drive motor and a turntable drive shaft, the turntable drive motor is drive-connected to the turntable drive shaft, and the turntable drive shaft is drive-connected to the turntable. The turntable is provided with an upper arm drive motor and a forearm drive motor. The turntable drive motor, the upper arm drive motor and the forearm drive motor are all servo motors with absolute value encoders. According to the drive structure of the desktop robotic arm, by using servo motors as the drive motors for controlling the turntable, an upper arm and a forearm, for which the absolute value encoders are correspondingly configured, control accuracy and driving power can be improved; and the adopted absolute value encoders do not need a memory function or to re-find the zero or a reference position, and have strong anti-interference performance and high data reliability, which enables the desktop robotic arm to be suitable for industrial applications. Further, the present invention also discloses a desktop robotic arm and a robot.