DESIGN AND FABRICATION OF LIFTING MACHINE FOR AUTOMOBILE

B.SENTHIL KUMART.THENARASUB.JOTHIRAMALINGAMV.KARBACHAVE

PROJECT GUIDE

J.SRINIVAS M.E..

ASSEMBLED VIEW

ABSTRACT The Project deals with the innovative solution for the automobile garages.

In the currently available Jacks, there is a chance of injury and discomfort when the person works under the chassis. When there is fault in the vehicle, the vehicle should be taken to the hydraulic jack in the service station and the repair work should be done. If any vehicle is already placed over the hydraulic jack, the vehicle should be taken from it and the newly incoming vehicle should be placed. Hence the main purpose of this project is to position the car in a titled position through some angle safely and work can be performed readily under carriage while the car is in the tilted position.

This lifting machine can be taken to any place and it is compact so that it can be kept in the rear side panel of the vehicle. This lifting machine doesn’t need any electric power or hydraulic power to operate, but it requires only mechanical energy thus it can be operated at any location. The lifting principle has been used in this project. So that one end is hinged to the base and other end is set free to incline with respect to the hinged end. This lifting can incline to an angle less than 80 degrees and it can lift weights up to 9810 Newton (1 ton). A chain block is used to reduce the human effort given to lift the vehicle. Hence by giving a small effort the lifting machine can be driven effortlessly.

INTRODUCTION

The Lifting Machine is an innovative solution for the automotive garages. It is a comfortable, mobile, independent of electrical source, and cost effective. In the titled position, the parts under the chassis can be easily worked out. This Lift reduces the risk of damage to the worker working under the chase of the vehicle. Normally, the vehicle should be taken to the nearby work station and have to be serviced by using the hydraulic jack. Hence the vehicle should be taken to the work station. But if the vehicle gets into trouble at some remote areas, then there is a difficulty to service it without using the hydraulic jack. But by using the Lifting Machine, the vehicle can be serviced at that place itself.

HINGED SETUP

STOPPERS

The stoppers are used to withhold the vehicle from falling or rolling, when the vehicle is held on the platform or lifted or tilted. Two types are stoppers are provided. Namely anti rolling stopper and slide resisting stopper.

Slide Resisting Stopper Anti Rolling Stopper

SLIDE RESISTING STOPPER

ANTI ROLLING STOPPER

W = 9810 N P = ? Rf = ? Using the formulae, Bending moment (M) = L * W = 9810 * ( 0.85 * 10³ )

= 8338500 N-mm Bending Moment (M) = P * L 8338500 = P * ( 1.6 * 10³ ) Human Effort (P) = 5211.562 N

Reaction Force (Rf) = W – P = 9810 – 5211.5628 = 4598.4 N Here the pin is subjected to the Double shear stress,

hence the load distributed at 2 cross sections. Hence, load acting over the area (A) = 2 * dp² *

π 4

Shear stress (σs) = . Rf . 2 * . π . * dp² 4 (σs) = 42 N/mm² 42 * 10³ = ( 4598.4 ) 2 * π * dp² 4 dp = 10.46 mm Taking the available std diameter, (dp) = 15 mm

Bending on the Inclining channel M = 8338.496 N-mm Bending stress (σb) = . M . Z Z = bh³ – b1h1³ 6h Z = [(h/2) * h³] – [(h/8) *

(h³/1.25)] 6h (σs) = 60 N/mm²

60 = 8338.496 Z

Z = 138974.93 mm^4

[(h/2) * h³] – [(h/8) * (h³/1.25)] = 138974.93 6h

MERITS

Traction, Steering, Brake and Anti-Shock system repair can be performed without causing back ache.

Extension of gear box is possible without assistance. Rotary shaft seal exchange is possible without emptying oil. Exhaust pipe wielding, Body work repair and rust removal can

be done without over head spark. Under carriage production painting without accidentally

sprinkling sensitive carriage equipment. Service, Lubrication and control check possible at short

notice. Spectator’s eyes can be easily caught at show rooms, fair and

various events. The gap between the two platform can be adjusted to the

required distance (i.e., to the width of the vehicle).

CONCLUSION

Easy job made for the consultancies. Provides comfort for the person working. It is compact and hence it can be shifted

easily and it is portable. It is manually operated, hence no

requirement of any electric power. It is cost effective compared to the Hydraulic

jack. Reduces the risk of getting injured.

Cross section of C – Channel = h = 125 mm b = 62 mm b1 = 15.55

mm h1 = 99.58

mm Taking the std available C – Channel dimensions, Breadth of the Channel (B) = 76.2 mm Width of the Channel (W) = 38.1 mm

Buckling load Buckling load (Bl) = π² E I le² Taking E = 200 * 10³ N/mm² Moment of inertia (I) = bh³ – b1h1³ 12 (I) = (h/2)*h³ – (h/8)(h/1.25)³ 12 le = 1.219 m

I = 8819265.873 mm^4

Hence by substituting the values we get,

Buckling load, Bl = 11711493.14 N