Planetary Gearbox

Top Gear Transmissions offers three types of planetary gearbox, wheel drive, shaft power, and spindle power. Here is what they are and how they work. WHEEL DRIVE In a wheel drive planetary gearbox, the sun gear drives a peripheral planetary gear fixed to the carrier. When the sun gear is driven, the planetary gear rotates the outer ring gear. The wheel can be mounted over the housing of the gearbox. The assembly size can be minimized by mounting the wheel directly to the gearbox. Wheel drive planetary gears can provide up to 332,000 Nm of torque. SHAFT OUTPUT In the shaft drive gearbox, the sun gear drives the surrounding planetary gears contained in a rotating carrier. The ring gear is fixed as a rotating carrier transfers the drive to the shaft. The housing of the gearbox is fixed directly to the machine whose output is the axis of rotation. Our range of shaft output gears can provide up to 113,000 Nm of torque. What are planetary gears used for? Planetary gear sets can be used for a

                      PLANETARY GEAR SETS  The planetary gear set mostly consists of Four main parts as shown in Figure Below. Sun gear Planet gear Ring gea r Carrier Each of these components can be the input, the output, or can be held stationary. Depending upon input, output, and stationery element the following gear ratios can be calculated. S.No. Input Output Stationary Ratio A Sun ( S ) Planet Carrier ( C ) Ring ( R ) 1 + R/S B Planet Carrier ( C ) Ring ( R ) Sun ( S ) 1 / (1 + S/R) C Sun ( S ) Ring ( R ) Planet Carrier ( C ) -R/S Holding any two components together will deliver 1:1 gear reduction. The first gear ratio listed above is a  reduction  where the output speed is slower than the input speed. The second is an  overdrive , where the output speed is faster than the input speed. The last is also reduction but with opposite output direction (hence represented by negative sign). As most of the industrial applications demand speed reduction, our concern is with only the first

  We Top Gear Transmissions based in SATARA (Maharashtra), the Manchester city of PLANETARY Products in India. Our quality range includes planetary gearboxes, planetary geared motors, planetary drives, helical planetary gearboxes, bevel planetary gearboxes, electric motors, and other transmission drives. They are widely used in the chemical industry, sugar industry, material handling equipment, printing and packaging industry, textile industry, stone processing machinery, mining industry, steel mill. Advantages of planetary systems over helical gearboxes: They are compact, take up less space, and are light. Noise and vibration are reduced as the load is shared. This also increases efficiency. The shaft is inline and concentric, so there is no bending moment. The manufacture of such parts is relatively inexpensive due to their smaller size compared to parallel shaft gearboxes. Disadvantages : Gear systems require complex and precise manufacturing. The tooth proportions are specific and