mechanical design of autonomous all terrain robot
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MECHANICAL DESIGN OF AN AUTONOMOUS ALL TERRAIN ROBOT
GUIDED BY:Mr.T.MATHAVARAJ RAVIKUMAR
BY,R.NIRANJAN KUMAR
T.PRABHAKARAN
A.VIGNESH NAGAPPANM.VENGATNATHAN
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INTRODUCTION Autonomous Robots perform desired taskswithout human intervention
All Terrain Autonomous Robot designed to take
part in military assignmentsThe robot should navigate through
y G ravelsy Sand and Mudy
Corrugationsy Slopey Hazardous Area
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MECHANICAL STRUCTURE
It consists of:y Chassis
y Main frame
y Base frame
y Transmission unit
y Wheel block
y Track belt
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CHASSIS
Structure consists of L-shaped frame
Slightly tapered to hold leading wheel
Main wheels connected to base frame
Main frame is used to carry payload
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WHEEL BLOCK
It consists main wheel, leading wheel, rollerwheel
Vulcanized rubber material is used for track belt
Wheels are made up of Nylon material
This belt avoids slippage
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EN G INE
TYPE : 2-stroke
DISPLACEMENT : 35 cu.cm
COMPRESSION RATIO : 8.0:1
MAX OUTPUT : 1 hp
MAX TORQUE : 1.0 N-m
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TRANSMISSION CALCULATION
Distance covered by main wheel per revolution:2*3.14*0.1 = 0.628 m
Distance covered by robot in one min at engine speed
of 3000rpm is 0.628*100 = 62.8m/min
Speed of robot at engine speed 3000rpm: 3.768 km/hr.
Hence the payload greater than 75kg can be easilycarried.
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CENTRIFUGAL CLUTCH
It engages when engine speed reaches 1000 rpm
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REDUCIN G G EAR
It reduces the speed in the ratio 10:1It transmits the power to the Differential unit
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BRAKIN G UNIT
Drum Brake is usedFitted to the main driving wheel
Actuated by solenoid
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WORKIN GEngine power is transmitted to the clutch by using V-belt
Then from clutch, it is transmitted to gear reductionbox, speed reduction is about 10:1
Now transmitted to the differential unit, speedreduction is about 3:1
Therefore, from engine to driving wheels speedreduction is about 30:1 and hence more torque isproduced
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RESULTS
Tested in all sorts of terrain and achieved easytraction
It withstands for payload about 80 kg
Slight vibration is produced by the Engine
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CONCLUSION
A Robot that can navigate in all terrain andcontaminated environment is developed
This robot enables easy navigation and goodsurveillance system
Remote monitoring can be done by mounting
vision cameras in the robot
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THANK YOU