TFR090 Series High Precision Planetary Gearbox Helical Gear Reducer

Overview

TFR090 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 designed to provide high precision, low backlash, and high torque transmission. It is widely used in industrial automation equipment, medical equipment, aerospace, precision instruments, and robotics, among others.

Basic Structure of High Precision Planetary Gearbox

The basic structure of the high precision planetary gearbox includes several key components:

• Sun Gear: Located at the center of the planetary gearbox, the sun gear is usually connected to the input shaft or fixed to the housing as a stationary component.
• Planet Gears: These gears orbit and rotate around the sun gear and are supported and held in relative position to each other by the planet carrier. Each planet gear meshes with both the sun gear and the ring gear/annulus, and they jointly bear and distribute the load when power is input.
• Planet Carrier: The planet carrier is a structure with multiple planet gear shaft holes, which carries the planet gears and allows them to rotate relative to the sun gear. The planet carrier can serve as an output component or be connected to another shaft to transmit or receive torque.
• Ring Gear/Annulus: The ring gear/annulus is 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 ring gear/annulus can also serve as an input or output end.
• 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 between components.
• Housing: The housing is a sturdy structure that encloses all internal components, providing stable support for the gears and protecting the internal components from external impurities. It may also contain cooling or lubrication systems.
• Shafts and Keys: The input and output shafts are connected to the sun gear or the planet carrier via keys to transmit power, ensuring precise torque transmission and axial positioning.
• Seals: Seals are used to prevent lubricating oil leakage and contamination from entering the gearbox, ensuring internal cleanliness and good lubrication condition.

Working Principle of High Precision Planetary Gearbox

The high precision planetary gearbox works through the following principles:

• Torque Transmission and Amplification: When the power is transmitted from the input shaft to the sun gear, the sun gear starts to rotate. Since the planet gears mesh with the sun gear and the ring gear/annulus at the same time, they start to revolve and rotate. Due to the joint action of multiple sets of planet gears, the load of the whole system is evenly distributed, which can significantly increase the output torque and achieve torque amplification.
• Control of Speed and Transmission Ratio: By adjusting the tooth number ratio of the sun gear, planet gears, and ring gear/annulus, the speed relationship and transmission ratio between input and output can be precisely controlled. For example, if there are more planet gears or the difference between the tooth numbers of the sun gear and the ring gear/annulus is larger, the transmission ratio increases, the output speed decreases, and the torque correspondingly increases.
• Low Backlash Characteristics: High-precision planetary gearbox specifically focuses on reducing or eliminating the backlash between gears, known as "zero/low backlash." This is usually achieved through precision machining, preloading techniques, and component selection to ensure high motion accuracy and smoothness under any load.
• Dynamic Response and Stability: Due to the even load distribution and multiple contact points, the high precision planetary gearbox can provide good dynamic performance, including fast response, stable operation, and durability under heavy loads.

Design and Selection Considerations for High Precision Planetary Gearbox

The design and selection of high precision planetary gearbox should take into account several factors, including:

Applications of High Precision Planetary Gearbox

The high precision planetary gearbox is widely used in various industries and applications, including:

• Servo motor systems: Used in industrial automation equipment for precise speed control and position positioning, such as robotic joint drives, precision machine tool feed mechanisms, and semiconductor manufacturing equipment.
• Medical equipment: Used in high-end medical equipment such as CT scanners, MRI machines, and surgical robots for precise motion control and torque amplification.
• Aerospace: Used in aircraft landing gear retracting systems, flight control system actuators, satellite attitude adjustment devices and other applications that require high reliability and precision.
• Precision instruments: Used in scientific experimental equipment, precision measuring instruments, optical tracking systems, and other scenarios that require 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 automatic storage systems such as lifters, conveyor drives, AGVs (automated guided vehicles), etc.

About Our Company

We are a professional manufacturer of high-quality power transmission equipment, located in Hangzhou, Zhejiang. We operate strictly in accordance with the international quality management system standard ISO9001:2008, and our products have passed the mandatory CCC certification in China and the CE certification of the European Union. Our products are produced according to international IC standards and have reached the advanced level of similar products in the world.

Our Advantages

• Advanced production equipment and testing technology.
• Strict quality control system and comprehensive after-sales service.
• Professional technical team and customized design capability.
• Optimized product structure and cost-effective price.
• Flexible production lead time and timely delivery.
• Continuous innovative research and development and sustainable development strategy.

Author: Miya