Drive Systems of Servo Motors for Coding Robots

June 28, 2021

Drive Systems of Servo Motors for Coding Robots

Coding robots put forward higher requirements for the service life of the micro gearbox and are more sensitive to noise. Due to the limitation of tooth width, helical gears show little improvement in the noise. Therefore, it is important to emphasize the optimization of gear parameters and add the clutch mechanism in the micro gearbox. When the machine falls and the micro gearbox is hit by an external impact, the gears can be protected. ZHAOWEI drive systems of servo motors for coding robots can realize a large transmission ratio in small space to complete the conversion of the transmission shaft with six degrees of freedom (6DoF), and reasonably arrange the space of gearbox.


Common Motor-Drive Mechanisms in Coding Robots
The driving mechanism of coding robots is divided into rotary drive mode and linear drive mode. Due to the advantages of a strong axis of rotation, low friction and good reliability, the rotary drive mode should be adopted as much as possible in the structural design. However, in the joint of the walking mechanism, the joint expansion completely relies on the rotary drive mode, which has the following disadvantages:


1.Although the rotational motion can be converted into linear motion, the acceleration of the joint expansion cannot be ignored in the high-speed motion, which may produce loud noise;
2.In order to improve the flexibility of site selection, the linear drive system must be added, which is bulky and complex.

ZHAOWEI Steering Gear Drive Mechanism for Coding Robots
The output gear of the gear set inside the coding robot steering gear is connected with a potentiometer to form a position sensor, so the rotation angle of the steering gear will be affected by the rotation angle of the potentiometer. By binding the potentiometer to the output gear coupling, the gear ratio can be controlled to realize the rotation of the steering gear with a larger range, reducing the error that increases along with the rotation angle. Small gears lack axial force, so the meshing pinion is not sensitive to the axial error. Considering that planetary gear can achieve a large transmission ratio in small space, ZHAOWEI adopts 38mm planetary gearhead to control the rotation drive of the coding robot and adopts 28mm plastic gearhead to control its linear motion. Both of them construct the steering gear drive system for joints of coding robots, which can meet the needs of intelligent transmission for joints expansion and movement, and improve the diversity and stability of the movement of the steering gear.

How to Enable the Educational Function of Coding Robots by ZHAOWEI Servo Motor Drive System?

In the early stage of cooperation with the customers, the customers proposed that the coding robot has a high requirement for the size of the internal gearbox and operational performance. Besides, in view of market sales, the high performance-price ratio should be achieved. All of these pose a huge challenge to ZHAOWEI in design and manufacturing.


After repeated authentication tests, ZHAOWEI gear motor has finally achieved the micro steering gear transmission structure with high torque, whose modules of planetary gears can be developed to M=0.05, with the tooth space smaller than a hair. ZHAOWEI power steering gearbox goes through a variety of debugging tests for performance: It can withstand the vibration, impact and high & low temperature; Low electromagnetic interference and low noise tests contribute to the product characteristics of low noise, low energy consumption and long service life. With the angle sensor encoder of robots in micro transmission system, ZHAOWEI helps the coding robot servo motor gearbox to realize the six degrees of freedom control for actions. This can be applied to the angle sensor and gear drive device of the coding robot, which improves its joint control for flexible rotation and movement.


Test-to-Fail: Servo Motor Gearbox for Coding Robots
The reliability and stability of the product is the comprehensive index to evaluate the technical level of the product. In order to analyze, evaluate, verify and improve product reliability, it is vital to obtain reliable data of assembly and components based on the failed test cases. We have established the transmission module laboratory, which has multi-functional experimental equipment such as a vibrator, constant temperature & humidity incubator, thermal shock chamber, box rain test chamber, salt spray test machine, noise room, and so on.


Future Trends
In recent years, a variety of schools and businesses have increased investment in the research of artificial intelligence (AI). The robot steering gearboxes are applied more and more extensively. Thus, higher requirements of structure and space design should be achieved. In addition to enhancing the reliability, it is important to reduce the total cost and pay attention to the characteristics of great torsional rigidity, small vibration, strong impact resistance, high bearing capacity and compact size, better meeting the six degrees of freedom needed by the transmission of robots. Both standard types and customizable types are available in ZHAOWEI. For customization services, please contact the online sales, engineers or technicians.


In order to satisfy the ever-changing needs of the market, ZHAOWEI can provide a variety of intelligent transmission gearbox customized according to customer needs, from research & development, design, manufacturing to experimental testing. ZHAOWEI firmly strives to help realize the intelligent and high-tech purpose by micro drive system for intelligent robots.