INTERNATIONAL JOURNAL FOR RESEARCH & DEVELOPMENT IN
TECHNOLOGY
Volume-7,Issue-2 (Feb-17)
ISSN (O) :- 2349-3585
Design Analysis and Fabrication of Three Link Screw Jack
__________________________________________________________________________________________
Ashwini Patil1, Shreyash Padile2, Khalid Mulla3, Saurav Ranjan4, Asst. prof. Vivek Diware5
1,2,3,4,5
Mechanical, D. Y. Patil College of Engineering, Akurdi, Pune 44
Abstract:- A screw jack is an example of a power screw in
minimum skilled labor. In most of the garages the vehicles are
which a small force applied I a horizontal plane is used to
lifted by using screw jack. This needs high man power and
raise or lower a large load. Jacks are simple mechanisms
skilled labor. In order to avoid all such disadvantages, the
used to drive large loads short distances and to lift the heavy
automated motorized object lifting jack has been designed in
loads. It also have the advanced feature of rotating the parts
such a way that it can be used to lift the vehicle very smoothly
about their axis where there is not enough space to move the
without any impact force. The operation is made simple so
load. The power screw design of a common Toggle jack
that even unskilled labor can use it with ease. A screw jack is
reduces the amount of force required by the user to drive the
a portable device consisting of a screw mechanism used to
mechanism. Most of the Toggle jacks are similar in design,
raise or lower the load. there are two types of screw jack
consisting of eight main members out of whom four are
namely hydraulic and mechanical screw jack. a hydraulic jack
driven by a power screw and rest of four by loading
consists of a cylinder and piston mechanism. Mechanical jack
condition. In this report, a unique design of a Toggle jack is
can be either hand operated or power driven. Screw jacks are
used to lift the heavy loads at the stable state with the unique
made of different type of material having different thread
condition. In toggle jack screw and nut are main
profiles like square, trapezoidal, acme, buttress, etc. jacks are
components. A screw is moving part and nut is a stationary
frequently used in raising cars, industrial machinery and even
part. Both the parts always work in meshing condition.
airplanes.
Therefore there are stresses like shear and tensile stresses
induced in materials which are responsible for failure of
screw. Different materials of screw and nut can induce
different magnitude of stresses so it is necessary to select a
pair of material combination in such a way that a pair gives
induced stress within safe limit.
INTRODUCTION
Our research survey in this regard revealed that in several
automobile garages, revealed the facts that mostly some
Screw jack
difficult methods were adopted in lifting the vehicles for
it is broadly defined as replacement of manual effort by
reconditioning, repair and maintenance. This fabricated model
mechanical power in all degrees of automation. The operation
has mainly concentrated on this difficulty, and hence a
remains to be an essential part of the system although with
suitable device has been designed, such that the vehicle and
changing demands on physical input, the degree of
heavy objects can be lifted from floor land without the
mechanization is increased. Since traditional jack that
application of impact force. The fabrication part of it has been
available in market involve plenty of variety like screw jack.
considered with almost case for its simplicity and economy,
We had selected the traditional scissor jack for L.M.V. and
such that this can be accommodated as one of its essential
focuses our intention to remove perm ant welds as that is the
tools on automobile garages. The object lifting jack has been
area where chances of failure is more. We replaced weld joints
developed to cater to the needs of small and medium
by rivets as well reduced materials by redesigning special
automobile garages, which are normally man powered with
brackets and employing special manufacturing processes for
129
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Paper Title:- Design Analysis and Fabrication of Three Link Screw Jack
traditional. The principle on which the screw jack works is
helicopter and tank, for almost four centuries[2](a). It is not
similar to that of an inclined plane. There are mainly two types
until the late 1800s that we have evidence of the product being
of jacks-hydraulic and mechanical. A hydraulic jack consists
developed further rewet the industrial revolution of the late
of a cylinder and piston mechanism. The movement of the
18th and 19th centuries came the first use of screws in
piston rod is used to raise or lower the load. Mechanical jacks
machine tools, via English inventors such as John Wilkinson
can be either hand operated or power driven. A screw jack is
and Henry Maudsley The most notable inventor in mechanical
commonly used with cars but is also used in many other ways,
engineering from the early 1800s was undoubtedly the
including industrial machinery and even aero planes. They can
mechanical genius Joseph Whitworth, who recognized the
be short, tall, fat, or thin depending on the amount of pressure
need for precision had become as important in industry as the
they will be under and the space that they need to fit into. The
provision of power .While he would eventually have over 50
jack is made out of various types of metal, but the screw itself
British patents with titles ranging from knitting machines to
is generally made out of lead. While screw jacks are designed
rifles, it was Whitworth’s work on screw cutting machines,
purposely for raising and lowering loads, they are not ideal for
accurate measuring instruments and standards covering the
side loads, although some can withstand side loads depending
angle and pitch of screw threads that would most influence our
on the diameter and size of the lifting screw. Shock loads
industry
should also be avoided or minimized.
internationally famous for their precision and quality and
today[2](b).Whitworth’s
tools
had
become
LITERATURE SURVEY
dominated the market from the 1850s. Inspired young
Screw type mechanical jacks were very common for jeeps and
engineers began to put Whitworth’smachine tools to new uses.
trucks of World War II vintage .For example, the World War
During the early 1880s in Coati cook, a small town near
II jeeps (Willys MB and Ford GPW) were issued the "Jack,
Quebec, a 24-year-old inventor named Frank Henry Sleeper
Automobile, Screw type, Capacity 1 1/2 ton", Ordnance part
designed a lifting jack. Like da Vinci’s jack, it was a
number 41-J-66. This jacks, and similar jacks for trucks, were
technological innovation because it was based on the principle
activated by using the lug wrench as a handle for the jack's
of the ball bearing for supporting a load and transferred rotary
ratchet action to of the jack. The 41-J-66 jack was carried in
motion, through gearing and a screw, into linear motion for
the jeep's tool compartment. Screw type jack's continued in
moving the load. The device was efficient, reliable and easy to
use for small capacity requirements due to low cost of
operate. It was used in the construction of bridges, but mostly
production raise or lower it. A control tab is marked up/down
by the railroad industry, where it was able to lift locomotives
and its position determines the direction of movement and
and railway cars. Local Coati cook industrialist, Arthur
almost no maintenance. The virtues of using a screw as a
Osmoses Norton, spotted the potential for Sleeper’s design
machine, essentially an inclined plane wound round a
and in 1886 hired the young man and purchased the patent.
cylinder, was first demonstrated by Archimedes in 200BC
The Norton‟ jack was born. Over the coming years the famous
with his device used for pumping water[2] There is evidence
“Norton” jacks were manufactured at plants in Boston, Coati
of the use of screws in the Ancient Roman world but it was the
cook and Moline, Illinois.[1]
great Leonardo Vinci, in the late 1400s, who first
demonstrated
the
use
of
a
screw
jack
for
lifting
ACKNOWLEDGEMENT
We are extremely thankful to our HOD Dr. D.R. Panchagade,
loads .Leonardo’s design used a threaded worm gear,
D. Y. Patil College of Engineering,
supported on bearings, that rotated by the turning of a worm
Akurdi for their support.
shaft to drive a lifting screw to move the load - instantly
We are thankful to Asst.prof. Vivek
recognizable as the principle we use today .We can’t be sure
College of engineering,Akurdi, for their support and guidance.
of the intended application of his invention, but it seems to
We are extremely thankful to Design head Mr.Shalil Akre,
have been relegated to the history books, along with the
Autoline Industry,Bhosari
Diware, D.Y.PATIL
130
ISSN:-2349-3585 |www.ijrdt.org
Paper Title:- Design Analysis and Fabrication of Three Link Screw Jack
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a)
http://www.powerjacks.com/PowerJacks-History-
The-Screw-Jack-Story.php
b) http://www.radicon.com/screw-jacks.php
[3].
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text
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[4].
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Consideration of Material Alternatives in Enhancement
to get Unique Solution in Design of Screw Jack
.Nitinchandra R. Patel1, Dipen B. Rokad2, Ankit V.
Vekariya3, Pratik J. Chauhan4 Assistant Professor,
Mechanical Engineering department, G.H. Patel college
of Engineering
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DESIGN AND ANALYSIS OF SCISSOR JACK
(Manoj R Patil and S D Kachave)
131
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