Table of Contents
What do you meant by epicyclic gear train?
Definition. An epicyclic gear train is a coaxial speed reducer or increaser stage comprised of a sun gear, planet gear(s), and a ring gear (Townsend 1992; Coy et al. 1985). The ratio attained from the gear train depends on the component that has its rotational motion constrained or controlled.
What is the name of the epicycle gear train?
planetary gear train
Epicyclic gear trains also known as a planetary gear train are gear trains with relative motions of axes. A carrier connects the centers of the two gears and rotates to carry one gear, called the planet gear, around the other called the sun gear.
What gears are in trains?
2.4 Simple gears A simple gear train uses two gears, which may be of different sizes. If one of these gears is attached to a motor or a crank then it is called the driver gear. The gear that is turned by the driver gear is called the driven gear.
What are the main advantages of epicyclic gearbox?
Advantages of Epicyclic Gearbox :
- High reduction ratios.
- Compact and lightweight with high torque transmission.
- High radial loads on the output shaft.
- It is quieter in operation.
- Uniform distribution of load over all gears having greater tooth contact.
What is annular gear?
The annulus gear is a one-piece or monolithic gear having a set of gear teeth formed on an inner surface thereof for operably coupling with a set of planetary gears.
What is sun and planet gear train?
The sun and planet gear is a method of converting reciprocating motion to rotary motion and was used in the first rotative beam engines.
Where do we use epicyclic gear train?
The epicyclic gear trains are used in the back gear of lathe, differential gears of the automobiles, hoists, pulley blocks, wrist watches, etc. The epicyclic gear trains are useful for transmitting high-velocity ratios with gears of moderate size in a comparatively lesser space.
What is the last gear in a gear train called?
Gear trains with two gears The “input gear” (also known as drive gear) transmits power to the “output gear” (also known as driven gear).
What are the advantages of epicyclic gearing?
What are the main advantages of epicyclic gear box?
The advantages of planetary gearboxes: Coaxial arrangement of input shaft and output shaft. Load distribution to several planetary gears. High efficiency due to low rolling power. Almost unlimited transmission ratio options due to combination of several planet stages.
What is compound gear train?
A compound gear is a number of gears fixed together. Consequently, they rotate at the same speed. An example can be seen below. The gears that make up a compound gear usually differ in size and have a different number of teeth. This is useful if there is a need to speed up or slow down the final output.
What are epicyclic gear trains?
Epicyclic gear trains include a sun gear, a planet carrier, and one or more planetary gears. The planetary gears may also mesh with an internal ring gear. Epicyclic gear trains have two degrees of freedom and, in order to determine their motion, two inputs must be defined such as the speed of both the sun and the ring gear.
What is the working principle of an epicyclic gearbox?
The working principle of the epicyclic gearbox is based on the fact the fixing any of the gears i.e. sun gear, planetary gears, and annular gear is done to obtain the required torque or speed output. As fixing any of the above causes the variation in gear ratios from high torque to high speed.
Is epicyclic gearing for design engineers?
For design engineers who are just beginning their careers—and even old pros who could use a refresher course—the following article takes a basic approach to discussing epicyclic gearing. Recent articles in Gear Solutions have discussed epicyclic gearing, but often in the context of experienced engineers.
Where can I find media related to epicyclic gears?
Wikimedia Commons has media related to Epicyclic gears. Kinematic Models for Design Digital Library (KMODDL), movies and photos of hundreds of working mechanical-systems models at Cornell.