07-07-2014, 03:52 PM
Auto Car Jack Using Internal Car Power
Auto Car Jack Using Internal Car Power.pdf (Size: 310.66 KB / Downloads: 119)
Abstract
Car jacks usually use mechanical advantage to allow a human to lift a vehicle by
manual force. More powerful jacks are using hydraulic power to provide more lift over greater
distances. This paper presents the development of the car jack for emergency use with using
internal cigarette lighter power (12volts). The automatic easy car-jack utilizes this power source
to save individuals having to exert any energy. To increase the lifting power in order to ensure
the power is adequate, gear ratio was used. The car jacker was developed utilizing the
Solidworks® and its analyses to check the safety factor and force acting. The fabrication work
has been done with milling and grinding machine. The car jacker will be tested and it predicted
to have enough power to lift and holding the car as normal car jacker.
INTRODUCTION
An automotive jack is a device used to raise
all or part of a vehicle into the air in order to
facilitate vehicle maintenances or breakdown
repairs. Most people are familiar with the
basic car jack (manually operated) and it’s
included as standard equipment for most of the
new cars. Vehicle owners who would like to
rotate their tires themselves either front to
back and so forth or who may install snow
tires before the winter and remove them in the
spring need to use a jack to perform the job
[1]. Changing a flat tire is not a very pleasant
experience. Nowadays, a variety of car jacks
have been developed for lifting an automobile
from a ground surface. Available car jacks,
however, are typically manually operated and
therefore require substantial laborious physical
effort on the part of the user. Such jacks
present difficulties for the elderly and
handicapped and are especially
disadvantageous under bad weather conditions
[2].
In light of such inherent disadvantages,
commercial automobile repair and service
stations are commonly equipped with large
and hi-tech car lift, wherein such lifts are
raised and lowered via electrically-powered
systems [3]. However, due to their size and
high costs of purchasing and maintaining
electrically-powered car lifts, such lifts are not
available to the average car owner. Such
electrical-powered portable jacks not only
remove the arduous task of lifting an
automobile via manually-operated jacks, but
further decrease the time needed to repair the
automobile. Such a feature can be especially
advantageous when it is necessary to repair an
automobile on the side of a roadway or under
other hazardous conditions [4].
There also reports on car jacks which lead to a
serious number of accidents. A specified jack
purposed to hold up to 1000 kilograms, but
tests undertaken by Consumer Affairs has
revealed that is fails to work after lifting 250
kilograms and may physically break when it
has a weight close to its 1000 kilograms
capacity [3]. Tests have proven that the jack
THE DEVELOPMENT
Figure 1 shows the design of automatic car
jacker where:
1. Original Scissor jack
2. Screw shaft
3. Power window motor
4. Pinion
5. Gear
6. Frame holder
7. Stabilizer base
Furthermore, Figure 2 is the actual prototype
of the automatic car jack. The entire
requirement from the drawing is then
transform onto the real prototype. It also
included a switch buttons system to raise and
lowering the jack (Head load). Figure 1, shows
the used scissor jack which has been collected
from the junk yard and it still can be used. The
scissor jack is the best jacks available in the
market. According to Farhad, the pneumatic
and hydraulic jack is not safe because usually
need maintenance and sometime leaked [6].
The development will be base on this scissor
jack. The screw shaft which can be rotated and
raise the head load up and down. The screw
shaft is very important because in this design
will need a system which can withstand the
load and lock the raised level of the jack. The
screw will be the mechanism to adjust and
hold the height level.
MECHANICAL PARTS
The mechanism lifting system was applied on
the scissor jack. The scissor jack specific
description is it can withstand the maximum
load of 850kg which is the best because the
test car for this project is a PERODUA
Kancil® (682kg) [10].The test will be detailed
CONSLUSIONS
Considering all available car jacks in the
market, this prototype can be improved by a
few modifications on the features and design.
The objectives are to design a car jack that is
safe, reliable and able to raise and lower the
level, to develop a car jack that is powered by
internal car power and automated with buttons
system. Although this car jack was design
only on PERODUA Kancil, by using higher
torque it is able to lift more loads such as
Proton Wira® and Proton Iswara® car.