What is epicyclic gear train used for?
What is epicyclic gear train used for?
This is the lowest gear ratio attainable with an epicyclic gear train. This type of gearing is sometimes used in tractors and construction equipment to provide high torque to the drive wheels. In bicycle hub gears, the sun is usually stationary, being keyed to the axle or even machined directly onto it.
Is epicyclic gear train used in differential?
A spur gear differential is constructed from two identical coaxial epicyclic gear trains assembled with a single carrier such that their planet gears are engaged.
Why epicyclic gears are used in overdrive units?
An overdrive consists of an electrically or hydraulically operated epicyclic gear train bolted behind the transmission unit. It can either couple the input driveshaft directly to the output shaft (or propeller shaft) (1:1), or increase the output speed so that it turns faster than the input shaft (1:1 + n).
In which configuration is the epicyclic gearbox?
7. In which of the configuration of epicyclic gearbox output will be forward and fast output speed? Explanation: When the Sun gear is stationary, the planet carrier is driving and the ring gear is driven then output is forward and fast speed. When any two of the three are stationary then we get the direct drive.
What are the various types of the torque in an epicyclic gear train?
Gear train is in equilibrium under influence three torques namely driving / input torque, output /driven torque, holding /fixing/braking torque.
Which gear train is used in automobile?
Planetary gear train (PGT) has been widely used in the transmissions of helicopters, automobiles, wind turbine, aircraft engines, etc. The main advantages of this transmission are its high efficiency, its compactness, its large transmission ratio and its large power-to-weight ratio, etc.
What is the train value of gear train?
The train value of a gear train is the ratio of the driven or follower’s speed to the driver’s speed. While the speed ratio is the ratio of the driver’s speed to that of the driven or follower speed. In other words, the train value of a gear train is the inverse of the gear train’s speed ratio.
What is holding torque in epicyclic gear train?
It is a motorized unit consisting of SUN gear mounted on input shaft. Two plane gears mesh with the annular gear. These planet gears are mounted on a common arm to which output shaft is fitted.
How many degrees of freedom are in an epicyclic gear train?
Hence, (3) is the correct answer.