The TNE155 Series High Precision Planetary Gearbox Helical Gear Reducer is a type of gearbox that is used for high-precision applications. It is also known as a servo motor planetary gearbox or a low backlash planetary gearbox. The TNE155 Series gearbox is designed to provide high precision and low backlash, making it ideal for use in applications where accuracy is critical. With a compact and durable design, this gearbox is suitable for a wide range of applications.
The high precision planetary gearbox consists of the following main components:
The sun gear is located at the center of the planetary gearbox and is typically connected to the input shaft or fixed to the housing as a stationary member.
The planet gears 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, and when power is applied, they collectively bear and distribute loads.
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.
The ring gear or annulus is a large-diameter ring gear fixed inside the housing with teeth on both its inner and outer surfaces that mesh with the planet gears. In some applications, the ring gear can also serve as an input or output end.
The bearings in the high precision planetary gearbox support the input and output shafts as well as the planet carrier, ensuring stable rotation and smooth operation between components.
The housing is the external frame of the entire gearbox, protecting internal components from external environmental influences and providing installation interfaces. Seals ensure that internal lubricants do not leak while preventing dust and water from entering the gearbox.
The working principle of a high precision planetary gearbox includes the following:
When power is inputted to the sun gear, the planet gears rotate around the sun gear. Since the planet gears mesh with both the sun gear and the ring gear, they rotate about their own axis while revolving around the center of the sun gear with the planet carrier. In this way, the torque inputted to the sun gear is amplified through the planet gears and evenly distributed to the output end on the planet carrier.
Speed conversion and torque amplification between the input and output ends can be achieved by adjusting the gear ratio of different components. Generally, the effect of torque amplification is more significant when the number of planet gears increases or when the gear ratio increases, but the output speed decreases at the same time.
In high-precision applications, in order to ensure precise position control and minimal mechanical clearance, high precision planetary gearboxes adopt preloading technology to reduce or eliminate the gap between gears, that is, "zero/low backlash" design.
One important advantage of the planetary gear mechanism is that it can evenly distribute loads among multiple planet gears, thereby improving the bearing capacity and stability of the entire system, and optimizing dynamic response performance.
The following table lists the design and selection considerations for high precision planetary gearbox:
| Design and Selection Considerations | Explanation |
|---|---|
| Accuracy Requirements | The accuracy requirements for the application will affect the selection of the gearbox. |
| Operating Speed Range | The operating speed range for the application will affect the selection of the gearbox. |
| Load Requirements | The load requirements for the application will affect the selection of the gearbox. |
| Environmental Conditions | The environmental conditions under which the gearbox will operate will affect the selection of the gearbox. |
| Service Life Requirements | The service life requirements for the application will affect the selection of the gearbox. |
| Installation and Maintenance | The ease of installation and maintenance of the gearbox should be considered when selecting the gearbox. |
High precision planetary gearbox has a wide range of application fields, including:
Used in industrial automation equipment for precise speed control and position positioning, such as robot joint drive, feed mechanism of precision machine tools, semiconductor manufacturing equipment, etc.
Used in high-end medical equipment such as CT scanners, MRI machines, surgical robots, etc. for accurate motion control and torque amplification.
Used in aircraft landing gear retractable systems, actuating mechanisms in flight control systems, satellite attitude adjustment devices, etc. that require high reliability and accuracy.
Used in scientific experimental equipment, precision measuring instruments, optical tracking systems, etc. that have extremely high requirements for transmission accuracy.
Used in power steering systems of new energy vehicles, drive units of electric vehicles, transmission systems of high-performance racing cars, etc.
Used in joint drive parts of industrial robots, service robots, and special operations robots.
Used in automatic storage systems such as lifting platforms, conveyor drive units, AGV (automatic guided vehicle), etc.
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