What is a planetary gearbox?
A planetary gearbox is a sophisticated gear system where both the input and output shafts are perfectly aligned to deliver maximum efficiency. This innovative design is renowned for its ability to transfer the highest torque in the smallest possible form factor, often referred to as torque density, making it an essential component in modern engineering applications.
The bicycle's acceleration hub is a prime example of the ingenious planet-wheel mechanism. Ever marveled at the immense power and capabilities packed in such a small hub? In a three-speed hub, a single-stage planetary gear system is utilized, while a five-speed hub employs a two-stage system. Each planetary gear system offers a reduction state, a direct coupling, and an acceleration mode, providing versatile performance tailored to your cycling needs.
In mathematical precision, the smallest reduction ratio achievable is 3:1, while the largest is 10:1. Ratios below 3 cause the sun gear to become disproportionately large compared to the planet gears, while ratios above 10 result in a sun wheel that is too small, diminishing torque. Typically, these ratios are absolute, represented as integer values, ensuring consistent performance and engineering integrity.
The inventive genius behind the planetary gearbox remains a mystery, yet its functional brilliance was first described by Leonardo da Vinci in 1490. Since then, this remarkable design has been employed for centuries, showcasing its timeless utility and enduring legacy in mechanical engineering.
| Model |
2105 |
2205 |
2207 |
2209 |
2210 |
2211 |
2255D |
311R |
| Power |
18.5 |
30 |
18.5/22 |
30 |
37 |
55 |
55 |
55 |
| (KW) |
| Input Speed |
615 |
818 |
635/635 |
635 |
756 |
756 |
652 |
652 |
| (rpm) |
| Speed Ratio |
21.95 |
29.2 |
23.54/23.54 |
23.54 |
27 |
27 |
23.3 |
27 |
| Output Torque |
6310 |
10232 |
6550/7780 |
10600 |
12620 |
18760 |
18760 |
18760 |
| (N.M) |
| Max. Torque |
11400 |
18500 |
11000/13000 |
18000 |
22700 |
33800 |
33800 |
40000 |
| (N.M) |
| Weight |
141 |
180 |
138 |
132 |
205 |
220 |
303 |
352 |
| (KG) |
| Application |
1~1.25mm |
1.5mm |
1mm |
1.5mm |
2~2.5mm |
3mm |
3~3.5mm |
3~4.5mm |
- The gearbox's housing is expertly designed to support parallel shaft modes and horizontal mounting, featuring a flexible component array that expands the reducer's configurations. This adaptability ensures unparalleled convenience and customization.
- Crafted with a sound-absorbable structure, an expansive surface area, and a large fan, this design excels in temperature and noise management. Precision grinding of cylindrical and bevel gears guarantees stable, efficient power transmission, delivering optimal performance.
- Input Mode: Tailor your setup with options such as motor-connected flange or shaft input, expertly designed to meet diverse operational requirements.
- Output Mode: Select from options like a solid shaft with flat key, hollow shaft with flat key, hollow shaft with shrink disk, hollow or solid shaft with involute splines, or solid shaft with flange, each offering distinct advantages for various applications.
Mounting Mode: With options including foot-mounted, flange-mounted, swing base-mounted, and torque-arm-mounted styles, these mounting solutions offer unmatched versatility and adaptability to suit any application.
- The planetary gearbox series offers unparalleled flexibility, with sizes ranging from 3 to 26, stages from 1 to 4, and ratios from 1.25 to 450. When paired with the WR, S, and K series, the ratio can be significantly increased, delivering superior performance and adaptability in diverse settings.
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| Packaging |
| Size |
800(L) * 800(W) * 800 (H) |
Packed Wear Parts to Delivery |
Transport of Large Trucks to The Seaport |
| Packaging Details |
The normal package is wooden box(Size: L*W*H). If container is too tight,we will use PE film for packing or pack it according to customers special request. |
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