What is a simple gear train?
A simple gear train has only one gear fixed to each shaft. A gear train consists of a combination of two or more gears, mounted on rotating shafts, to transmit torque or power. A compound gear train will have more than one gear fixed to some of the shafts.
What is meant by idler gear?
Definition of idler gear 1 : a gear placed between a driving and a driven gear to transfer motion without change of direction or gear ratio. 2 : a gear for support or guidance instead of power transmission.
What is the gear ratio of a simple gear with idler?
Idler Gears have NO EFFECT on Gear Ratio or Gear Reduction, regardless of the number of teeth they have. Example Gear Trains: In all three of these example Gear Trains, the Driving Gear is 12-teeth and the Driven Gear is 36-teeth, thus the Gear Ratio for all three examples is the exact same – 12:36 .
What is the use of idler gear in gearbox?
The purpose of an idler gear can be two-fold. Firstly, the idler gear will change the direction of rotation of the output shaft. Secondly, an idler gear can assist to reduce the size of the input/output gears whilst maintaining the spacing of the shafts.
Where are simple gear trains used?
Gear trains are used in almost all machines which are dealing with the mechanical power. Some of the places where gear trains are used are engines, lathes, clocks, gear box and Differential of automobiles etc.
What is the difference between simple and compound gear train?
In a simple gear train, a single gear is mounted on each shaft. The compound gear train has two or more gears mounted on the same shaft.
Are idler gears used in trains?
The purpose of an idler gear used in gear trains is to have the required direction of rotation at the output shaft. It may be noted that when the number of intermediate gears (idler gear) is odd, the motion of both the gears (i.e. driver and driven or follower) is like.
What are simple gears?
When there is only one gear on each shaft, as shown in Fig., it is known as simple gear train. The gears are represented by their pitch circles. When the distance between the two shafts is small, the two gears 1 and 2 are made to mesh with each other to transmit motion from one shaft to the other, as shown in Fig.
What are types of gear trains?
Types of Gear trains
- Simple Gear train.
- Compound gear train.
- Reverted gear train.
- Planetary or epicyclic gear train.
What is the difference between a simple gear train and a compound gear train?
The main difference between compound gear trains and simple gear trains is related to the shaft. The compound gear trains have its own individual shafts for working of gear while for simple gear trains there are more than one gear or a series of gears.
What is compound gear train?
When there is more than one gear on a shaft, as shown in Fig. 1, it is called a compound train of gear. We have seen in previous section that the idle gears, in a simple train of gears do not affect the speed ratio of the system. But these gears are useful in bridging over the space between the driver and the driven.
Where is a simple gear train used?
Which is the simplest type of gear?
There are many types of gears. However, the simplest and most commonly used gears are the ones used to transmit specific speed ratio between two parallel shafts at a defined distance. In particular, gears with their teeth parallel to the shafts as shown in Figure 1.1 called spur gears are the most popular.
What is the difference between simple gear train and compound gear train?
In a simple gear train, a single gear is mounted on each shaft. The compound gear train has two or more gears mounted on the same shaft. The gear ratio only depends on input gear and output gear. The gear ratio depends on input gear, output gear, and intermediate compound gear.