12-07-2014, 04:23 PM
DESIGN AND FABRICATION OF MOTORIZED
SCREW JACK FOR A FOUR WHEELER
DESIGN AND FABRICATION.pdf (Size: 766.37 KB / Downloads: 131)
INTRODUCTION
• Power screws are used to convert rotary motion
translatory motion.
• A screw jack is an example of a power screw in which a small
force applied in a horizontal plane is used to raise or lower a
large load.
• The principle on which it works is similar to that of an inclined
MOTORIZED SCREW JACK
• The motorized screw jack has been developed to cater to the
needs of small and medium automobile garages.
• In most of the garages the vehicles are lifted by using screw
jack. This needs high man power and skilled labor.
• The motorized jack has been designed in such a way that it
can be used to lift the vehicle very smoothly without any
impact force, thereby increasing the mechanical advantage
BATTERIES
• In isolated systems away from the grid, batteries are used
for storage of excess solar energy which can be converted
into electrical energy.
• To be economically attractive the storage of solar electricity
requires a battery with a particular combination of properties:
1. Low cost
2. Long life
3. High reliability
4. High overall efficiency
5. Low discharge
6. Minimum maintenance
SPUR GEAR
• The spur gears, p g , which are designed to transmit motion and
power between parallel shafts, are the most economical
gears in the power transmission industry.
Design considerations for a gear drive
• In the design of a gear drive, the following data is usually
given:
1. The power to be transmitted,
2. The speed of the driving gear,
3. The speed of the driven gear or the velocity ratio, and
4. The centre distance.
CONCLUSION
• Screw Jacks are the ideal product to push, pull, lift, lower and
position loads of anything p y g from a couple of kilograms to
hundreds of tonnes.
• The need has long existed for an improved portable jack for
automotive vehicles.
• The main requirement of a motorized screw jack is stability. It
should be easily controllable by a switch so that jacking can
be done from a position of safety. It should also be easily
movable either to a position underneath the axle of the
vehicle or some other reinforced support surface designed to
be engaged by a jack.
• Thus, the product has been developed considering all the
above requirements.