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What is planetary gear ratio?
For example, if the sun gear has 20 teeth and the ring gear has 60, the planetary gear has 80 teeth. Calculate gear ratio by dividing the number of teeth on the driven gear by the number of teeth on the driving gear.
What is a planetary gear used for?
How are Planetary Gears used? Generally, planetary gears are used as speed reducers. They are used to slow down motors and increase the torque. Torque is the working power of the machine.
What is a planetary gear in a transmission?
Planetary Gearboxes are a type of gearbox where the input and output both have the same centre of rotation. This means that the centre of the input gear revolves around the centre of the output gear and the input and output shafts are aligned.
What is sun gear in transmission?
In shaft drive gearboxes, the sun gear drives the surrounding planetary gears which are housed in a rotating carrier. The ring gear is held stationary with the rotating carrier delivering drive to the shaft. The housing of the gearbox is fixed directly to the machine with the output being a rotating shaft.
What are the components of a planetary gear set?
What Is A Planetary Gear Set? A simple planetary gear set is made up of three main components: 1. The sun gear that sits in the centre (central gear). 2. Multiple planet gears. 3. The ring gear (outer gear). The three components make up a stage within a planetary gearbox. For higher ratios we can offer double or triple stages.
How are different transmission ratios achieved with planetary gear?
With a planetary gear, different transmission ratios can be achieved, depending on the shaft at which the input or the output takes place and the gearwheel that is locked firm. The different transmission ratios will be explained using the example of the planetary gear shown below.
How does a wheel drive planetary gearbox work?
Here’s what they are and how they work. In a wheel drive planetary gearbox, the sun gear drives the surrounding planetary gears which are fixed to a carrier. When the sun gear is driven, the planet gears rotate the outer ring gear. The wheels can be mounted over the housing of the gearbox.
Which is the second motion in planetary gears?
The second motion is to lock the carrier, and rotate the gears. As noted above, this forms a more typical gear set, and gear ratios can be derived as functions of the various gear diameters.