TNF090 Series High Precision Planetary Gearbox Helical Gear Reducer

TNF090 Series High Precision Planetary Gearbox Helical Gear Reducer

Overview

The TNF090 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 is commonly used in industrial automation systems. It is designed to provide high precision, low backlash, and high torsional stiffness. The gearbox features a compact design, high power density, and excellent efficiency.

Basic Structure

The high precision planetary gearbox consists of five main components: the sun gear, planet gears, planet carrier, ring gear/annulus, bearings and shaft system, and housing and seals.

• 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.
• Planet Gears: The planet gears rotate around the sun gear and are supported and held in position relative to each other by the planet carrier. Each planet gear meshes with both the sun gear and the ring gear/annulus and shares and distributes the load when power is input.
• Planet Carrier: The planet carrier is a structure with multiple planet gear shaft holes. It supports the planet gears and allows them to rotate relative to the sun gear. The planet carrier can be used as an output element or connected to another shaft to transmit or receive torque.
• Ring Gear/Annulus: The ring gear/annulus is a large diameter ring-shaped gear that is fixed inside the housing. It has teeth on both the inner and outer surfaces and meshes with the planet gears. In some applications, the ring gear/annulus can also be used as an input or output end.
• Bearings and Shaft System: Bearings in the high precision planetary gearbox support the input shaft, output shaft, and planet carrier to ensure stable rotation and smooth operation between the components.
• Housing and Seals: The housing is the outer frame of the gearbox that protects the internal components from external environmental factors and provides mounting interfaces. Seals ensure that internal lubricants do not leak and prevent dust and water from entering the gearbox.

Working Principle

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

• Torque Transmission: When power is input to the sun gear, the planet gears around it rotate. Since the planet gears mesh with both the sun gear and the ring gear/annulus, they rotate on their own axis while revolving around the center of the sun gear along with the planet carrier. In this way, the torque input to the sun gear is amplified and evenly distributed to the planet carrier at the output end.
• Speed Conversion and Torque Amplification: By adjusting the gear ratio of different components, speed conversion and torque amplification between input and output can be achieved. Generally, when the number of planet gears increases or the gear ratio increases, the effect of torque amplification becomes more significant, but the output speed will decrease at the same time.
• Low Backlash Design: In high precision applications, zero/low backlash design is adopted to reduce or eliminate the gap between gears by using preload technology, which ensures accurate positioning and minimal mechanical clearance.
• Load Distribution and Dynamic Response: One of the important advantages of the planetary gear mechanism is that it can distribute the load evenly among multiple planet gears, thereby improving the load-bearing capacity and stability of the entire system, and optimizing dynamic response performance.

Design and Selection Considerations

The design and selection of high precision planetary gearboxes depend on various factors, including:

Applications

The high precision planetary gearbox is widely used in various fields, including:

• Servo Motor Systems: Used for precise speed control and position positioning in industrial automation equipment, such as robot joint drives, feed mechanisms of precision machine tools, semiconductor manufacturing equipment, etc.
• Medical Equipment: Used for precise motion control and torque amplification in high-end medical equipment such as CT scanners, MRI machines, surgical robots, etc.
• Aerospace: Used in aircraft landing gear actuation systems, flight control system actuators, satellite attitude adjustment devices, etc. that require high reliability and precision.
• Precision Instruments: Used in scientific experimental equipment, precision measuring instruments, optical tracking systems, etc. that require extremely high transmission accuracy.
• Automotive Manufacturing: Used in power steering systems of new energy vehicles, drive units of electric vehicles, transmission systems of high-performance racing cars, etc.
• Robotics: Used in joint drive parts of industrial robots, service robots, and special operation robots.
• Logistics Automation: Used in lifting platforms, conveyor drive units, AGVs, etc. in automatic warehousing systems.

About Us

We are a professional manufacturer of transmission equipment in Ningbo, Zhejiang. Our company operates in strict accordance with the international quality management system standard ISO9001:2015. Our products have passed the compulsory CCC certification in China and the European Union CE certification. Our products are produced according to international standards and reach the advanced level of similar products in the world.

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• Advanced production equipment and testing instruments.
• Strict quality control system and professional technical team.
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