TF120 Series High Precision Planetary Gearbox Helical Gear Reducer

Overview

TF120 Series High Precision Planetary Gearbox Helical Gear Reducer is a type of gearbox that is used for industrial automation equipment, specifically for precise speed control and position positioning. It is also known as a servo motor planetary gearbox and low backlash planetary gearbox. The gearbox is shown in the image below:

Basic Construction

The high precision planetary gearbox includes the following 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: The planet gears rotate around the sun gear and are supported and held in place relative to each other by the planet carrier. Each planet gear engages with both the sun gear and the ring gear/annulus, and they collectively bear and distribute the load when power is inputted.
• 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 act as an output element or be connected to another shaft to transmit or receive torque.
• Ring Gear/Annulus: The ring gear/annulus is a large diameter circular gear fixed inside the housing, with teeth on both its inner and outer surfaces that engage with the planet gears. In some applications, the ring gear/annulus can also act as an input or output terminal.
• Bearings and Shaft System: Bearings in the high precision planetary gearbox support the input shaft, output shaft, and the planet carrier to ensure stable rotation and smooth operation between components.
• Housing and Seals: The housing is the external frame of the entire gearbox, which protects internal components from external environmental influences and provides installation interfaces. Seals ensure that internal lubricating grease does not leak and prevent dust and water from entering the gearbox.

The basic construction of the high precision planetary gearbox is shown in the image below:

Explanation of components:

1. The sun gear is the central component of the planetary gearbox that generates torque.
2. The planet gears rotate around the sun gear and bear the load.
3. The planet carrier supports and maintains the relative position of the planet gears.
4. The ring gear/annulus is fixed inside the housing and engages with the planet gears.
5. Bearings and shafts ensure smooth operation and stable rotation of components.
6. The housing and seals protect internal components and prevent dust and water from entering the gearbox.

Working Principle

The working principle of the high precision planetary gearbox can be explained as follows:

• Torque Transmission: When power is inputted to the sun gear, it drives the planet gears around it. Since the planet gears engage with both the sun gear and the ring gear/annulus, they rotate around their own axis while also revolving around the center of the sun gear as part of the planet carrier. This amplifies the torque inputted to the sun gear and distributes it evenly to the planet carrier at the output terminal.
• Speed Conversion and Torque Amplification: By adjusting the gear ratio of various components, speed conversion between input and output and torque amplification can be achieved. Generally, increasing the number of planet gears or gear ratio will more significantly increase torque, but at the same time, output speed will decrease.
• Low Backlash Design: In high precision applications, in order to ensure accurate position control and minimum mechanical clearance, high precision planetary gearboxes use preload technology to reduce or eliminate gear clearance, also known as "zero/low backlash" design.
• Load Distribution and Dynamic Response: An important advantage of planetary gear mechanisms is that they can evenly distribute the load among multiple planet gears, thereby improving the bearing capacity and stability of the entire system, and optimizing dynamic response performance.

The working principle of the high precision planetary gearbox is shown in the image below:

Explanation of components:

1. Torque is inputted to the sun gear and amplified by the planet gears.
2. The gear ratio of different components can be adjusted to achieve speed conversion and torque amplification.
3. Low backlash design reduces or eliminates gear clearance for accurate position control.
4. Load is evenly distributed among multiple planet gears for improved bearing capacity and stability of the system.

Factors to Consider for Design and Selection

The following factors should be considered when designing and selecting a high precision planetary gearbox:

Factors to Consider	Explanation
Load Characteristics	The type, magnitude, and direction of the load applied to the gearbox should be considered to determine the appropriate load capacity and bearing capacity of the gearbox.
Input Speed and Torque	The input speed and torque of the gearbox should be considered to ensure that the gearbox can handle the required power.
Output Speed and Torque	The desired output speed and torque of the gearbox should be considered to ensure that the gearbox can meet the requirements of the application.
Installation Space	The available installation space for the gearbox should be considered to ensure that the gearbox can be properly installed and operated in the required environment.
Environmental Conditions	The environmental conditions (temperature, humidity, dirt, etc.) in which the gearbox will be used should be considered to ensure that the gearbox can operate reliably under these conditions.

Applications

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

• Servo Motor System: Used in conjunction with servo motors for precise speed control and position positioning in industrial automation equipment, such as robot joint drives, feed mechanisms for precision machine tools, and semiconductor manufacturing equipment.
• Medical Equipment: Used for precise motion control and torque amplification in high-end medical equipment such as CT scanners, MRI machines, and surgical robots.
• Aerospace: Used in aircraft landing gear systems, actuating mechanisms in flight control systems, and satellite attitude adjustment devices that require high reliability and precision.
• Precision Instruments: Used in scientific experimental equipment, precision measuring instruments, and optical tracking systems that have extremely high requirements for 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 the joint drive part of industrial robots, service robots, and special operation robots.
• Logistics Automation: Used in automatic storage systems, such as elevators, conveyor drives, and AGVs (automatic guided vehicles).

Explanation of applications:

1. Used in industrial automation equipment to achieve precise speed control and position positioning in various industries.
2. Used for precise motion control and torque amplification in high-end medical equipment.
3. Used in the aerospace industry for high reliability and precision in various applications.
4. Used in scientific experimental equipment, precision measuring instruments, and optical tracking systems for extremely high requirements for transmission accuracy.
5. Used in the power steering systems, drive units, and transmission systems of various vehicles.
6. Used in various industrial robot systems to achieve precise joint control.
7. Used in automatic storage systems such as elevators, conveyor drives, and AGVs (automatic guided vehicles).

About Us

We are a professional manufacturer of power transmission equipment located in Ningbo, Zhejiang. Our company strictly operates according to the international quality management system standard ISO9001??2015. Our products have passed the mandatory CCC certification in China and the CE certification of the European Community. Our products are produced according to international IC standards and have reached the advanced level of similar products internationally.

Our Advantages:

1. Production according to international IC standards with advanced technology.
2. Strict quality management system to ensure product quality.
3. Professional team to provide technical support and after-sales service.
4. Wide range of products to meet different customer needs.
5. Competitive prices to provide customers with cost-effective solutions.

Author: Miya