Fabrication of Stair Climbing Mechanism

Under Guidance Of:

Lect. Mr. Mr. D. Raghuveer Mechanical Dept. Presented By: • • • • •

 Introduction  Types of stair climber  Previously Designed Mechanism  Optimized Design  Purpose of optimization  Different parts  Steps In fabrication  Application Areas  Cost analysis  Result  Scope for Further Study  conclusion

 A stair climbing mechanism is a semi-automated vehicle,

which has the capability to climb the stairs easily. Stair climbing is one of the most attractive performances of mobile robot.  Stair climbing mechanism is utilized mainly for two purposes,

one is for making stair climbing wheel chair and other is for the shifting of heavy objects. It is more helpful for the physical handicapped persons and the persons who are unable to climb the stairs. So the freedom of mobility for a handicapped person increases. And heavy objects can be shifted from ground floor to top floor through the stairs.

Types of stair climbers  Two-legged  Four-legged  Six-legged  Leg-wheel Hybrid  Stair climbing mechanism with high grip crawler  Four wheeled stair climbing mechanism

 Low cost  Easy design and Fabrication  Easy mounting of motors  Higher strength  Better sitting arrangement  Better Dynamic balance

 Chain and sprocket drive  Steel Pipes, bars and rods  Bearings  Dc Geared Side shaft Motors  Transformer  Gripper (cycle tube)  Control switch

 Collecting The Required raw materials  Cut the Pipes And Rods To Required Size  Fabricate The Cut Pipes As Per The Design  Fix The Bearings At The Desired Position  Chain And Sprocket Arrangement  Put The Approaching Wheel  Alignment Of Motors  Connect The Drive With Motors  Fit the cycle tube on the chain

Steps In Fabrication  Place The Transformer  Connect The Motors With The Transformer Through A Switch  Connect Transformer To Power Source  Power Supply On  Testing  Make a base of plywood to put on the mechanism  Fix the base(Chair) on mechanism with nut and bolt  Then go for Final testing

 For perfect and smooth approaching with the stair  To increase gripness

 Motor Speed : 40 rpm  Torque

:120 kg-cm

 Copper Coiled Armature  Brushless Motor  Externally Geared For Transmission  Voltage 16 v  Currents : 4 amps

Testing

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Used as stair climbing wheelchair

Used for shifting luggage

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Cost analysis

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Result •

By considering several design aspect we fabricate a mechanism. The resulting mechanism can climb the stairs by carrying 20 kg weight when the stair inclination angle is 20o.

 Different parameters are obtained by considering the total

weight of 70 kg. and the motors of 120 kg.cm torque power are used in the mechanism. This stair climbing mechanism is utilized if the angle of the stair is 20 degree or below 20 degree. For the increment in the weight and the stair inclination angle, high power motors can be used, which will give better result.

Conclusion •

 An attempt has been made to fabricate a stair climbing mechanism with the available indigenous material and is proved that the fabrication of stair climbing mechanism can be achieved.