The main transmission structure of the servo planetary reducer is: bearings, planetary gears, sun gear, and internal gear ring.

The axes of the sun gear, planet carrier, and ring gear of the PMDC planetary gear motor wholesale are coaxial, with the sun gear located at the center of the mechanism. The inner side of the planetary gear meshes with the sun gear, and the outer side of the planetary gear meshes with the ring gear. The planetary gear is installed on the planetary axle through needle roller bearings, and the planetary axle is symmetrically fixed on the planetary carrier. In addition to rotating around the planetary axle, the planetary gear is also carried by the planetary carrier to orbit around the sun gear. Usually, there are 3-6 planetary gears evenly arranged around the sun gear. The sun gear, ring gear, and planetary carrier are all rotatable. If there is only one input among these three, there is no output; There must be two inputs (or two speeds that are determined) between these three in order for the third one to have an output.

A mechanism that uses a gear speed converter to reduce the number of rotations of a motor to the desired number of rotations and obtain a larger torque. In the gear reducer mechanism used for transmitting power and motion, planetary gearboxes are precision gearboxes with a reduction ratio that can be accurate to 0.1 to 0.5 revolutions per minute. Due to structural reasons, the single stage reduction ratio of the PMDC planetary gear motor is generally less than 3 and greater than 10. The common reduction ratios are 3/4/5/6/8/10, and the number of planetary gear reducer stages generally does not exceed 3. However, some customized reducers with large reduction ratios have 4 stages of reduction.

What are the characteristics of a PMDC planetary gear motor wholesale?

1、 High speed ratio and high efficiency. Advanced transmission, with an efficiency of over 90%. If multi-stage transmission is used, the reduction ratio is even greater.

2、 Compact structure and small volume. Due to the use of planetary transmission principle, the input shaft is on the same axis as the input shaft, resulting in a compact structure and small volume.

3、 Smooth operation with low noise. The large number of meshing teeth, high overlap coefficient, and smooth mechanism of the machine limit vibration and noise to a small extent.

4、 Reliable use and long lifespan. Due to the use of bearing steel as the main component, which has undergone quenching treatment (HRC58-62) to obtain high strength, and the use of rolling friction in some transmission contacts, it is durable and has a long service life.

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