MY PROFILE

Name : Abdullah Al Mahfuj.Department : Textile. Program : B Sc in Textile Engineering ID : 142014007Green University of Bangladesh .

Name of My Presentation

GEAR AND GEAR TRAINS

LETS START WITH MYJOURNEY....

INTRODUCTION TO GEARS AND GEAR

TRAINS

•Definition of gear•Task of gear

Types of Gear Trains

•TYPES OF GEARS•Definition of gears

Gearing up down mechanism

•Driver and driven•Speed ratio and train value

WHAT ARE GEARS???

• A toothed well that engage with another toothed while or with a rack .

In order to change the speed or direction of trans motion motion

Task of gear

Gear can transfer rotation to different axisGear can reverse the direction or rotationIt can change Speed

And Gear Trains???

Sometimes, two or more gears are made to mesh with each other to transmit power from one shaft to another. Such a combination is called gear train or train of toothed wheels.

Types of Gear Trains

I. Simple gear train.II. Compound gear train III. Reverted gear trainIV. Epicycle gear train

Types of Gear

1. Spurs gear2. Helical gear3. Bevel gear 4. Worm gear

Gearing up and down mechanisms

Gearing up mechanism:N1/N2=T1/T2Gearing down mechanism:N2/N1=T2/T1N1= speed of driverN2=speed of drivenT1= teeth no of driverT2= teeth no of driven

Speed ratio and Train value

Speed ratio = N1/N2=T1/T2Train value = N2/N1=T2/T1Let , N1= speed of driverN2=speed of drivenT1= teeth no of driverT2= teeth no of driven