TNR115 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 widely used in industrial automation equipment for precise speed control and position positioning. It is designed to reduce the speed and increase the torque of a motor and used in conjunction with a servo motor or stepper motor. The gearbox is known for its high precision and low backlash, which make it an ideal choice for demanding applications.
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.
The planet gears revolve 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 ring gear and shares and distributes the load when power is input.
The planet carrier is a structure with multiple planet gear shaft holes. It carries 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.
The ring gear/annulus is a large diameter ring-shaped gear fixed inside the housing and meshing with the planet gears. In some applications, the ring gear/annulus can also be used as an input or output end.
The bearings in the high-precision planetary gearbox are used to support the input and output shafts as well as the planet carrier, ensuring stable rotation and smooth operation of the components. The shaft system is also critical to the performance of the gearbox.
The housing is the external frame of the entire gearbox, which protects the internal components from external influences and provides installation interfaces. Seals ensure that internal lubricants do not leak and prevent dust and water from entering the gearbox.
When power is input to the sun gear, the planet gears revolve around the sun gear. Since the planet gears mesh with both the sun gear and the ring gear/annulus, they not only rotate around their own axis but also revolve around the center of the sun gear through the planet carrier. In this way, the torque input to the sun gear is amplified by the planet gears and evenly distributed to the planet carrier at the output end.
By adjusting the gear ratio between different components, it is possible to realize speed conversion between the input and output ends and torque amplification. 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 also decrease.
In high-precision applications, in order to ensure accurate position control and minimum mechanical clearance, high-precision planetary gearboxes adopt preload technology to reduce or eliminate gear clearance, which is known as "zero/low backlash" design.
One important advantage of the planetary gear mechanism is that it can distribute the load evenly among multiple planet gears, thereby improving the bearing capacity and stability of the entire system and optimizing dynamic response performance.
| Factors to Consider | Explanation |
|---|---|
| Application Requirements | For example, torque, speed, precision, and life expectancy. |
| Environmental Conditions | For example, temperature, humidity, and corrosive substances. |
| Mounting and Connection | For example, input and output shafts, flanges, and couplings. |
| Motor Type and Size | For example, servo motor or stepper motor and their power and torque. |
| Cost and Availability | For example, initial cost, maintenance cost, and lead time. |
The High Precision Planetary Gearbox is used in the following industries:
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