gearless transmission ppt free download
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Abstract—this paper presents the real time study
of mechanism. The system is to be analysed in
SolidWorks package software to watch the
response of the elbow rods and the also the hub
(coupled with shaft). The real time study is
carried out by applying a motor to one of the
shafts supported on bearings. Motion analysis is
performed by running the mechanism at 15
revolutions per minute, reaction forces and
reaction moment are plotted against clock run of
5 seconds by using post processor. Similar
motion analysis is carried out at different higher
revolutions per minute and peak values of forces
and moments are taken from the plot and
compared with allowable stress. Theoretical
calculations are made to obtain allowable stress
by making use of design data values. As a result,
response of elbow rod and hub is investigated to
find the permissible speed of mechanism.
Further simulation is performed to verify the
motion analysis results.
Keywords—SolidWorks; hub; elbow rods;
motion; workbench; gearless transmission
mechanism
I. INTRODUCTION
An essential requirement of the present world is
to achieve the objectives with maximum efficiency
at minimum cost. This requires least manufacturing
cost of replacement when any instrument fails. And
also that it performs the intended function at a
higher efficiency.
For transmitting motion and power from one shaft
to another which are non-parallel or intersecting and
coplanar, bevel gearing are generally employed. But
there are some inherent disadvantages associated
with bevel and worm gearing stated as complexity
in manufacturing, High cost of replacement.
To overcome all these difficulties we have a
mechanism which transmits motion between the two
non – parallel (intersecting) and coplanar shafts. As
it replaces gears and transmits motion without the
ISSN: 2348 9510
International Journal Of Core Engineering & Management (IJCEM)
Volume 1, Issue 6, September 2014
137
aid of gears it is also called as ―Gearless Power
Transmission Mechanism‖. As a reference we have
designed the mechanism for transmitting motion at
right angle. However it can also be employed for
transmitting motion at any angle to the driven shaft
by using the pin bent to conform to the angle
between the shaft (acute, obtuse or right angle).
The motion study and simulation of various
mechanisms has been frequently studied for several
years. Elaheh Hassanzadeh Toreh, Mehdi
Shahmohammadi and Nasim Khamseh performed
Kinematic and Kinetic Study of Rescue Robot
.
Gadhia Utsav D. given the Quarter model of
Wagon-R car’s rear suspension by making analysis
on ADAMS software
. Assad Anis carried out
analysis of Slider Crank Mechanism on ADAMS
Software package
. A. A. Yazdani performed
Multibody Dynamics Simulation of an Integrated
Landing Gear System using MSC.ADAMS
.
Mohammad Ranjbarkohan made use of ADAMS
software package and Newton’s laws for analyzing
the behavior of slider crank mechanism and
investigated the effect of engine rpm on connecting
rod and crankshaft . However, there hasn’t been
performed any study to sort out problems on
gearless transmission mechanism. Hence, this
analysis is performed.
II. SYSTEM UNDER STUDY
Fig.1: Trimetric view of gearless transmission
mechanism
Figure 1 shows the trimetric view of system under
study. As the figure suggest that this mechanism is
formed with 9 links and one board by assembling
them together.
Contact friction between bearings and shaft as
well as between elbow rods and hubs are
considered. Whole mechanism is developed for
analysis with taking gravity into account. System is
designed with factor of safety taken .
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