VELAMMAL COLLEGE OF ENGINEERING AND TECHNOLOGY

DEPT. OF MECHANICAL ENGG.

DESIGN AND FABRICATION OF OVERLOAD

DETECTION IN AUTOMOBILE REVIEW-1

SUPERVISOR:MR.N.DINESH KUMAR TEAM MEMBERS:

ASST.PROFF M.MOHAMEDH BYSAL

MECHANICAL DEPT. R.RAJ BHARATH

U.MADHANKUMAR

AIM

TO DETECT THE MAXIMUM LOAD THAT A AUTOMOBILE CAN WITHSTAND AND TO LOCK THE STEERING IF IT EXCEEDS MAXIMUM LOAD

AUTOMOBILE MAXIMUM LOAD

SHARE AUTOS[3WHEELERS] 350kg

BUSES[4WHEELERS] 10[tonnes]

COMMERCIAL TRUCKS[4WHEELERS]

22.5[tonnes]

GYPSY[4WHEELERS] 400kg

WHY THIS PROJECT

MANY ROAD ACCIDENTS HAPPEN DUE TO LOADING PASSENGERS MORE THAN A LIMIT GIVEN TO THE PARTICULAR VECHICLE

THUS BY LOADING MORE PASSENGERS WHILE TAKING A SHARP CURVE THE LOAD ACTS ON THE SINGLE SIDE AND THE AUTOMOBILE TUMBLES DOWN

LITERATURE REVIEW

REFERENCE WEB:WWW.AUTO360.COM

WWW.MEKANIZMALAR.COM

REFERENCE BOOK:DYNAMICS OF MACHINERY,KINEMATICS OF MACHINERY[DR.JEYAKUMAR]

 

MAIN DIAGRAM

WORKING

MECHANICAL ARRANGEMENT: HERE THE ENTIRE LOAD

ACTING ON A AUTOMOBILE IS DETECTED USING MECHANICAL SENSOR

THE MECHANICAL SENSOR IS CONSTRUCTED USING GEARS,SPRINGS,RACK AND PINION ARRANGEMENT etc

WE CONVERT THE “RECIPROCATING MOTION INTO ROTARY MOTION” USING GEAR AND RACKPINION ARRANGEMENT

WORKING

ELECTRICAL ARRANGEMENT AN “AUTOMATIC IGNITION OFF”

IS USED TO ARREST THE MOMENT OF THE STEERING WHEN THE LIMIT IS REACHED

A 6V BATTERY FROM WHICH TWO TERMINALS ARE TAKEN ONE(+) IS CONNECTED TO THE IRON PIECE AND OTHER TO THE SENSOR

WHEN THE LOAD REACHES MAXIMUM CURRENT ALSO FLOWS THROUGH THE (-) TERMINAL THUS MAKING THE IRON PIECE A MAGNET AND ARRESTING THE STEERIN MOTION

MAIN PARTS

CONNECTING RODSPUR GEAR

MAIN PARTS

RACKINION PINION

MAIN PARTS

HOLDERCONNECTOR

DIMENSIONSGEAR TEETH CALCULATIONS: GEAR RATIO : 1 NUMBER OF TEETH : 20 DIAMETERAL PITCH : 5 PITCH DIAMETER : 4 OUTSIDE DIAMETER : 4.4 ADDENDUM : 0.2 DEDENDUM : 0.231 TOOTH THICKNES : 0.314 WORKING DE : 0.4 WHOLE DEH : 0.43 BASE DIAMETER : 4.5 PRESSURE ANGLE : -2.30   [ALL DIMENSION ARE IN MM]

FORMULA USED: TO FIND INVOLUTE:X(T)=RCOS(T)+Y*TSIN(T) Y(T)=RSIN(T)-Y*TCOS(T) WHERE T, IS TOOTH THICKNESS. PITCH DIAMETER(Pc)=3.14D/T

WHERE D.IS THE OUTSIDE DIAMETEER

MODULIUS(M)=D/T

COMPONENTS

RATCHET PINION RACK SPUR GEAR CONNECTING ROD COUPLER SPRING SYNTHETIC RUBBER

YET TO BE………………….

THE PROCESS OF CONTROLING THE MOTION OF THE AUTOMOBILE IS TO BE DESIGNED ,BECAUSE THE LOAD VARIES ON THE CHASIS EVEN IF THERE IS A UPS AND DOWNS IN THE ROADS .SO ACCURATE DETECTION AND IGNITION OFF MUST BE DESIGNED

COST ESTIMATION

EQUIPMENT

PARTS COST[RS]

SPUR GEARS[3] 3X150=450

SYNTHETC RUBBER 1SQFEET=300

ELECTRICAL ARRANGEMENT

500

MAINTANANCE 1000

OTHERS 500

TOTAL COST 2750[APPROX]

THANK YOU