Power Transmission Mechanism: Spring and Gear System

Table of Contents
Introduction................................................................................................................................2
Spring.........................................................................................................................................2
Gear............................................................................................................................................3
Top view.....................................................................................................................................4
Front view..................................................................................................................................4
2D view......................................................................................................................................5
Motion of the power transmission assembly..............................................................................5
Literature review........................................................................................................................6
Deflection analysis.....................................................................................................................7
Manufacturing of the parts.........................................................................................................8
Finite element analysis...............................................................................................................8
Materials.....................................................................................................................................9
Results......................................................................................................................................10
References................................................................................................................................10
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Introduction
Present design deals with the power transmission from one place to another. There are
different mechanisms by which one can transmit the power, liker gear system, crank chain
mechanism, spring etc.
Spring
A spring is an elastic body, whose expand in size when load applied and regain its original
shape when removed. It absorbs automobile vibrations, shocks and loads by springing action
and to some extend by damping functions. It absorbs energy in the form of potential energy.
Springs capacity to absorb and store more strain energy makes the suspension system more
comfortable. Leaf spring is the simplest form of spring used in the suspension system of
vehicle. These springs are also known as flat, laminated or carriage spring. Most widely used
leaf spring type is semi-elliptic in heavy and light automobile vehicles. The multi leaf spring
comprises of various steps called blades while mono leaf spring is of only one step. Number
of steps increases the spring absorbing capability. For heavy vehicles multi leaf spring are
used while light vehicle mono leaf spring can be used.
Springs initially given a camber so they will have a tendency to bend under loading
condition. The leaf spring works under two hypothesis uniform strength and uniform width.
The master leaf spring is the longest and has eyes at its end while remaining steps of spring
are called graduated leaves.
Gear
A gear transmits power from one shaft to another. It is a rotating machine which has teeth on
its periphery. Teeth on meshing gears should have the same shaper for proper transmission of
motion or power. At least two gears are required for transfer of motion from one shaft to
another, more than two gears produces a gear train which has wide amount of applications in
the automobile industry. If one gear is smaller it will rotate faster compared to the larger gear.
One gear is termed as driver gear while second gear is termed as driven gear.
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Figure below shows the power transmission mechanism.
Above figure illustrates the type of motion transmission. In this mechanism two axial has
been used to hold the power transmission plate in their respective positions. While two
connecting plates has been utilized to connect them with the connecting angle with the help
of connecting shaft.
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Top view
Above figure shows the top view of the power mechanism generated in the present work.
Front view
Above figure shows the front view of the power transmission mechanism produced in the
present work. From the front view one can easily visualise all the parts of the power
transmission mechanism.
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