Working principle of planetary gear reducer:
1) The ring gear is fixed, the sun gear is active, and the planetary carrier is passive.
It can be seen that this combination is a reduced speed transmission, usually with a transmission ratio of 2.5 to 5 and the same steering.
2) The ring gear is fixed, the planetary carrier is active, and the sun gear is passive.
From the demonstration, it can be seen that this combination is an acceleration transmission, with a transmission ratio generally ranging from 0.2 to 0.4,
Turn towards the same direction.
3) The sun gear is fixed, the ring gear is active, and the planetary carrier is passive.
From the demonstration, it can be seen that this combination is a reduced speed transmission, with a transmission ratio generally ranging from 1.25 to 1.67,
Turn towards the same direction.
4) The sun gear is fixed, the planetary carrier is active, and the ring gear is passive.
From the demonstration, it can be seen that this combination is an acceleration transmission, with a transmission ratio generally ranging from 0.6 to 0.8,
Turn towards the same direction.
5) The planetary carrier is fixed, the sun gear is active, and the ring gear is passive.
From the demonstration, it can be seen that this combination is a reduced speed transmission, with a transmission ratio generally ranging from 1.5 to 4,
Turn in the opposite direction.
6) The planetary carrier is fixed, the ring gear is active, and the sun gear is passive.
From the demonstration of the planetary gearbox, it can be seen that this combination is an acceleration transmission, with a transmission ratio generally ranging from 0.25 to 0.67,
Turn in the opposite direction.
7) The situation where any two of the three components are combined into one:
When the planetary carrier and ring gear are combined as an active component, and the sun gear is a passive component, or
The motion of integrating the sun gear and planetary carrier as the active component and the ring gear as the passive component
The situation. From the demonstration, we can see that there is no relative motion between the planetary gears, as a whole
Body operation, transmission ratio of 1, same steering. This combination is commonly used in cars to form a direct
The file.
8) Any one of the three components is active, while the other two components are free:
From the analysis, it can be seen that the other two components have no definite speed output. The sixth combination method,
Due to the high acceleration and opposite steering of the active and passive components, this combination is usually not used in cars.
The other seven combinations of planetary gearboxes are commonly used.