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Planetary Gearbox, also known as a planetary reduction gearbox, features multiple planetary gears rotating around a sun gear. This precise structure reduces the transmission speed ratio while increasing the motor's torque. A planetary gearbox is a transmission device consisting of planetary gears, a sun gear, and inner and outer ring gears. The planetary gears are fixed to a planetary carrier, while the sun gear is fixed to a central axis. The inner and outer ring gears surround the central axis of the reducer assembly between the planetary gears and the sun gear. Rotation of the planetary gears drives the outer ring gear, thereby transmitting power to the reducer.
1. High Precision: Because the planetary gears are constantly connected to the planetary carrier, planetary gear transmissions have minimal backlash and offer high precision.
2. High Efficiency: Planetary gear transmissions utilize roller-type contact, ensuring high transmission accuracy and efficiency while also reducing transmission noise and vibration.
3. Compact Structure: Compared to other transmission devices, planetary gears offer a compact structure, enabling larger reduction ratios within a smaller space. 4. Smooth Transmission: Planetary gears utilize multiple tooth points, with each tooth point operating simultaneously during transmission, ensuring smooth transmission while ensuring accurate transmission.
5. Safe and Reliable: Planetary gear transmissions employ multiple teeth between the planetary gears and the planetary carrier, resulting in more stable transmission and a longer service life.
The advantages of planetary gearboxes include high load capacity, compact size, pure torque transmission, smooth operation, and the ability to coordinate multiple planetary gears, commonly known as multi-speed ratio gearboxes. Disadvantages of planetary gearboxes include their complex mechanical structure and relatively high manufacturing requirements. Another disadvantage is that their efficiency decreases significantly with increasing transmission ratios, but this characteristic is particularly useful for gear reduction.
Planetary gearboxes have a wide range of applications. Initially used in conjunction with electric motors, in addition to micro reduction motors, they are also used in the sunshade industry, office automation, smart home, production automation, medical equipment, financial machinery, and game consoles. Applications include automatic curtains, smart toilets, lift systems, banknote counters, advertising light boxes, and many other industries. Raydafon has a variety of specifications and models of Planetary Gearboxes, welcome to purchase.
Below is a table of common planetary gearbox specifications for your reference.
Classification Criteria | Type | Key Characteristics | Best Suited For |
Configuration | Simple Planetary | - 1 Sun gear, 1 Ring gear, 1 Planet Carrier with multiple planets- Most common and compact design | Robotics, EVs, industrial machinery |
Compound Planetary | - Multiple interconnected planetary stages- Higher reduction ratios in a single housing | Heavy machinery, wind turbines, aerospace | |
Differential Planetary | - Combines two inputs/outputs- Allows speed/torque splitting | Automotive differentials, hybrid vehicles | |
Gearing Arrangement | Spur Gear | - Straight-cut teeth- Simpler, louder, cost-effective | Conveyors, pumps, basic automation |
Helical Gear | - Angled teeth- Quieter, smoother, higher load capacity | Precision tools, elevators, compressors | |
Mounting Style | Inline | - Input/output shafts aligned coaxially- Minimal radial space | Servo motors, CNC machines |
Right-Angle | - Input/output shafts at 90°- Uses bevel gears or worm drives | Conveyor systems, packaging equipment | |
Performance Focus | High Torque | - Reinforced planets/carriers- Large gear contact areas | Cranes, excavators, industrial mixers |
High Speed | - Precision-balanced gears- Low backlash, optimized lubrication | Turbines, medical devices, centrifuges | |
High Precision | - Ultra-low backlash (<1 arc-min)- Stiff housing | Robotics arms, aerospace actuators | |
Unique Mechanisms | Planetary Variators | - Adjustable ring/sun gear ratios- Continuous speed control | Test benches, variable-speed drives |
Planetary Rollers | - Rollers instead of gears- Zero backlash, high rigidity | Semiconductor manufacturing, optics |
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