The motion is stable, the ability to resist shock and vibration is strong because several planetary wheels with the same structure are used and distributed evenly around the central wheel, which can balance the forces of the planetary wheel and the rotating arm.
At the same time, the coaxial reducer also increases the number of teeth involved in meshing, so the motion of planetary gear transmission is stable, the ability to resist shock and vibration is stronger, and the work is more reliable.
As long as the type of planetary gear transmission and the gear matching scheme are properly selected, a large transmission ratio can be obtained with a few gears. The transmission ratio of planetary gear reducer, which is only used as transmission motion, can reach several thousand. It should be pointed out that planetary gear transmission can still maintain many advantages such as compact structure, small mass and small volume when its transmission ratio is large. Moreover, it can realize the synthesis and decomposition of motion and the complex motion of various variable speeds.
The planetary gear reducer is in small volume, small mass, compact structure and large bearing capacity. Because the planetary gear transmission has power shunt and each center wheel forms coaxial line type transmission and reasonably applies the inner coupling gear pair, it can make its structure very compact. Again, because several planetary wheels are uniformly distributed around the central wheel to share the load, each gear bears less load and allows these gears to adopt smaller modulus.
In addition, the coaxial reducer makes full use of the large bearing capacity of the inner meshing and the capacitive volume of the inner gear ring itself in the structure, which is beneficial to reduce the outer profile size, make it small in size, small in mass, very compact in structure and large in bearing capacity. Generally, the outer dimensions and mass of planetary gear transmission are about 1/2~1/5 of that of ordinary gear transmission (i.e. under the same load conditions).
The transmission efficiency of planetary gear reducer is high because of the symmetry of the transmission structure of planetary gear, that is, it has several symmetrical distribution of planetary wheels, so that the reaction force acting on the center wheel and the rotating arm bearing can balance each other, to achieve the function of improving transmission efficiency. If the transmission type is chosen properly and the structure arrangement is reasonable, the efficiency value can reach to 0.97~0.99.