Overview of TFK120 Series High Precision Planetary Gearbox Helical Gear Reducer

TFK120 Series High Precision Planetary Gearbox Helical Gear Reducer, also known as servo motor planetary gearbox and low backlash planetary gearbox, is a high-precision gearbox designed to provide high torque, high accuracy, and low noise. It is commonly used in various industrial applications that require high precision and high reliability, such as robotics, automation, machine tools, medical equipment, and aerospace.

Basic Construction of High Precision Planetary Gearbox

The high precision planetary gearbox consists of the following components:

1. Sun Gear: The sun gear is located at the center of the planetary gearbox and is usually connected to the input shaft or fixed to the housing as a stationary component.
2. Planet Gears: The planet gears rotate around the sun gear and are supported and maintained in their relative positions by the planet carrier. Each planet gear meshes with both the sun gear and the internal ring gear, and they jointly bear and distribute the load when power is input.
3. Planet Carrier: The planet carrier is 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 serve as an output element or be connected to another shaft to transmit or receive torque.
4. Ring Gear/Annulus: The internal ring gear is a large-diameter annular gear fixed inside the housing, with teeth on both its 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 terminal.
5. Bearings and Shaft System: The bearings in the high precision planetary gearbox support the input shaft, output shaft, and planet carrier, ensuring stable rotation and smooth operation among all components.
6. Housing and Seals: The housing is the external frame of the entire gearbox that protects the internal components from external environmental influences and provides mounting interfaces. Seals ensure that the internal lubricant does not leak while preventing dust and moisture from entering the gearbox.

Explanation of Basic Construction of High Precision Planetary Gearbox

1. The sun gear is the central gear of the gearbox.
2. Planet gears are supported by the planet carrier.
3. The planet carrier allows the planet gears to rotate relative to the sun gear.
4. The ring gear meshes with the planet gears.
5. Bearings support the gearbox components.
6. The housing protects the internal components and provides mounting interfaces.
7. Seals prevent leakage and the ingress of dust and moisture.

Working Principle of High Precision Planetary Gearbox

The high precision planetary gearbox works based on the following principles:

1. Torque Transmission: When power is input to the sun gear, the planet gears around the sun gear rotate. Because the planet gears mesh with both the sun gear and the internal ring gear, they rotate around their own axis while revolving around the center of the sun gear with the planet carrier. In this way, the torque input to the sun gear is amplified and evenly distributed to the planet carrier on the output end through the planet gears.
2. Speed Conversion and Torque Amplification: By adjusting the gear ratio of different components, speed conversion and torque amplification can be achieved between input and output. Generally, when the number of planet gears or the gear ratio increases, the effect of torque amplification becomes more significant, but the output speed will decrease at the same time.
3. Low Backlash Design: In high precision applications, to ensure accurate position control and minimal mechanical clearance, high precision planetary gearboxes use preloading technology to reduce or eliminate gear clearance, which is known as "zero/low-backlash" design.
4. Load Distribution and Dynamic Response: An important advantage of the planetary gear mechanism is that it can evenly distribute the load among multiple planet gears, which enhances the load-bearing capacity and stability of the entire system and optimizes dynamic responsiveness.

Explanation of Working Principle of High Precision Planetary Gearbox

1. Torque transmission amplifies and distributes the input torque to the planet carrier.
2. Speed conversion and torque amplification can be achieved through adjusting gear ratio.
3. Low backlash design reduces mechanical clearance through preloading technology.
4. Load distribution among multiple planet gears enhances load-bearing capacity and stability of the system.

Considerations for High Precision Planetary Gearbox Design and Selection

Applications of High Precision Planetary Gearbox

The high precision planetary gearbox has a wide range of applications in various industries, including:

1. Servo Motor Systems: Used in conjunction with servo motors for precise speed control and position positioning in industrial automation equipment, such as robotic joint drives, precision machine tool feed mechanisms, and semiconductor manufacturing equipment.
2. Medical Devices: Used in high-end medical equipment such as CT scanners, MRI machines, and surgical robots to achieve precise motion control and torque amplification.
3. Aerospace: Used in landing gear retraction systems, actuating mechanisms for flight control systems, and attitude adjustment devices for satellites that require high reliability and precision.
4. Precision Instruments: Used in scientific experimental equipment, precision measurement instruments, and optical tracking systems that require high transmission accuracy.
5. Automotive Manufacturing: Used in power steering systems for new energy vehicles, drive units for electric vehicles, and transmission systems for high-performance racing cars.
6. Robotics: Used in joint transmission parts of industrial robots, service robots, and special work robots.
7. Logistics Automation: Used in automatic storage systems such as lifts, conveyor belt drives, and AGVs (automated guided vehicles).

Explanation of Applications of High Precision Planetary Gearbox

1. Servo motor systems require precise speed control and positioning, such as in robotic joint drives and precision machine tool feed mechanisms.
2. Medical devices require precise motion control and torque amplification, such as in CT scanners and surgical robots.
3. Aerospace applications require high reliability and precision, such as in landing gear retraction systems and satellite attitude adjustment devices.
4. Precision instruments require high transmission accuracy, such as in scientific experimental equipment and optical tracking systems.
5. Automotive manufacturing requires high-performance transmission systems, such as in power steering systems for new energy vehicles and drive units for electric vehicles.
6. Robotics require precision joint transmission parts for industrial robots, service robots, and special work robots.
7. Logistics automation requires automatic storage systems, such as lifts, conveyor belt drives, and AGVs (automated guided vehicles).

About Us

We are a professional manufacturer of transmission equipment, located in Hangzhou, Zhejiang Province, China. We specialize in research, development, production, and sales of various precision planetary gearboxes and other transmission equipment. Our products have passed CCC certification and CE certification, and we operate strictly in accordance with the international quality management system standard ISO9001:2015.

Our Advantages

• We have many years of experience in transmission equipment manufacturing, and we have a strong R&D team and production capacity.
• Our products are of high quality and reliability, and we provide comprehensive pre-sales and after-sales services.
• We have a complete range of products, including standard and customized models, to meet different application requirements.
• We have a wide range of customers, including domestic and foreign companies, and we have established long-term cooperative relationships with many of them.

Author: Miya