Overview

TM220 Series High Precision Planetary Gearbox Helical Gear Reducer, also known as servo motor planetary gearbox and low backlash planetary gearbox, is a type of gearbox that uses planetary gears to achieve high precision in motion control. It has a compact design and is widely used in various industrial automation applications.

High Precision Planetary Gearbox Construction

A high precision planetary gearbox has the following components:

• Sun Gear: located at the center of the planetary gearbox and usually connected to the input shaft or fixed to the housing as a stationary component.
• Planet Gears: orbit around the sun gear and are supported and held in relative position to each other by the carrier. They mesh with both the sun gear and internal ring gear, and distribute the load evenly.
• Planet Carrier: a structure with multiple planet gear shaft holes that supports the planet gears and allows them to rotate relative to the sun gear. The planet carrier can act as an output element or be connected to another shaft to transmit or receive torque.
• Ring Gear/Annulus: a large-diameter ring gear fixed inside the housing with teeth on both the inner and outer surfaces that mesh with the planet gears. In some applications, the internal ring gear can also serve as an input or output.
• Bearings and Shaft System: bearings in a high precision planetary gearbox support the input and output shafts as well as the planet carrier, ensuring stable rotation and smooth operation of the components.
• Housing: a sturdy structure that encapsulates all internal components to provide stable support for the gears, protect the internals from external impurities, and may contain cooling or lubrication systems.
• Shafts and Keys: the input and output shafts connect to the sun gear or planet carrier with keys to transmit power and ensure precise torque transmission and axial positioning.
• Seals: seals are used to prevent lubricating oil leakage and contamination from entering the gearbox, ensuring a clean and well-lubricated state.

Working Principle

A high precision planetary gearbox works by transferring and amplifying torque, controlling speed and gear ratio, and reducing backlash. Its key working principles include:

1. When power is transmitted from the input shaft to the sun gear, the planet gears start to revolve and rotate due to their meshing with both the sun gear and internal ring gear. The load is distributed and shared among multiple sets of planet gears, significantly increasing the output torque and achieving torque amplification.
2. Speed and gear ratio can be precisely controlled by adjusting the number of teeth on the sun gear, planet gears, and internal ring gear. For example, if there are more planet gears or the difference in teeth between the sun gear and internal ring gear is larger, the gear ratio increases, the output speed decreases, and the torque correspondingly increases.
3. High precision planetary gearboxes focus on reducing or eliminating gear clearance, which is also known as "zero/low backlash". This is achieved through precision machining, preloading technology, and component selection, ensuring high motion accuracy and smoothness under any load.
4. Due to the even load distribution and multiple contact points, high precision planetary gearboxes offer excellent dynamic performance, including fast response, stable operation, and durability under heavy loads.

Design and Selection Considerations

When designing and selecting a high precision planetary gearbox, the following factors should be taken into account:

Applications

High precision planetary gearboxes are widely used in various industries and applications that require precise motion control and high reliability. Some common applications include:

• Servo motor systems: used in industrial automation equipment for precise speed control and position positioning, such as robot joint drives, feed mechanisms for precision machine tools, semiconductor manufacturing equipment, etc.
• Medical equipment: used in high-end medical equipment such as CT scanners, MRI machines, surgical robots, etc. for precise motion control and torque amplification.
• Aerospace: used in landing gear retraction systems, actuating mechanisms for flight control systems, attitude adjustment devices for satellites, and other applications that require high reliability and precision.
• Precision instruments: used in scientific experimental equipment, precision measuring instruments, optical tracking systems, etc. that demand high transmission accuracy.
• Automotive manufacturing: used in power steering systems for new energy vehicles, drive units for electric vehicles, and transmission systems for high-performance racing cars.
• Robotics: used in joint drive parts of industrial robots, service robots, and special operation robots.
• Logistics automation: used in elevator, conveyor drive, AGV (automatic guided vehicle), and other automatic warehousing systems.

About Our Company

We are a professional manufacturer of power transmission equipment located in Hangzhou, Zhejiang. Our company strictly operates according to the lSO90012021 international quality management system standard, and our products have passed the mandatory CCC certification in China and the CE certification of the European Union. Our products are manufactured according to international IC standards and have reached the advanced level of similar products worldwide.

Our Advantages

• Advanced production equipment and technology
• Strict quality control system and testing procedures
• Experienced R&D team and customized solutions
• Efficient after-sales service and technical support
• Competitive pricing and timely delivery
• Flexible cooperation and partnership

Author: Miya