This video is part of the content developed by nptel, a joint initiative of all iits and iisc. Whenever a change in the speed or torque of a rotating device is needed, a gear train or one of its cousins, the belt or chain drive mechanism, will usually be used. Study and analyze the gear profiles and gear trains. The number of teeth for spur gears is given by where k 1f fll1 for fulld tht th08f tbt th d ldepth teeth, 0.
Unit 7 gear trains, kinematics of machines of vtu syllabus prepared by hareesha n gowda, asst. Theory of machines is an applied science of the relationships between geometry and relative motion of the parts of the machine, and concerns to the forces which. Gear trains image from simon fraser university image from jtekt torsen na, inc. Enable power transmission at varied angles and varied lengths. Image from blog of haja sherief image from hpi racing image from proquest image from sandia national labs image from piaget image from fortune, apr. N is the gears teeth number, the sign depends on the type of gear and, in sequence is for external gears. Understand gear trains and how to calculate ratios.
Theory of machine study notes hand written tom free study suff. In some epicyclic gear trains, we may find two or more planetary gears. Design of machinery an introduction to the synthesis and. Introduction to gear trainsintroduction to gear trains. Compound planetary gear train planetary gear train with more than one arm r14 t1t3. The user enters the revolutions per minute and driection of the first driver gear along with information about. Recognize different gearing systems and relative advantages and disadvantages between.
Gear trains simple, compound and epicyclic gear trains. Complex numbers, belt drive, gears, gear trains and mass balancing. A gear whose axis itself is revolving is called a planetary gear. Depending upon the type and accuracy of motion desired. It is a mathematical equation that tells how many values can vary and can help in the first three types of gear trains, the axes of the shafts over which the gears are mounted are ger relative to. Nptel syllabus kinematics of machines video course s note on the model curriculum prepared by aicte five of the seven topics listed under the heading kinematics of machine belongs to dynamics. Enable speed reduction between engine and the drive wheels in. This chapter will explore the theory of gear tooth action and the design.
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