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1. FABRICATION OF HAND POWER TRICYCLE FOR HANDICAPPED PERSON
USING HAND LEVER AND CRANK SYSTEM
Aim of the project
To design and fabricate the three wheel base chair for the handicap people to be
propelled by the link mechanism converting into cranking, using the advantage of leverage
ABSTRACT:
In this experimental study on a prototype lever-propelled wheelchair, the effect of a
range of mechanical advantages (MA) on physical strain, oxygen uptake, energy cost,
mechanical efficiency, stroke frequency and perceived exertion was examined. Wheelchair
propulsion has been reported to be responsible for musculoskeletal pain in the upper extremities.
Epidemiological studies have shown a high prevalence of shoulder complaints in paraplegic and
quadriplegic spinal cord injured (SCI) people.
It has been argued that the high incidence of shoulder complaints in SCI was the result of
the weight‐bearing or propulsion function of the upper extremity in those subjects. This work
aimed at proposing an alternative wheelchair propulsion technique based on the levers’ system.
The interface prototype‐users, the wheelchair skills evaluation, the oxygen uptake and the
cardiac frequency are investigated by an objective and subjective studies.
Our prototype is designed to be an attempt in the field of disabled athletes having some
advantages of a non‐ conventional manual wheelchair propulsion technique, avoiding
complications induced by the conventional one.
Moment Control: By moving steering liner motion forward and backward direction.
Break: By stopping steering moment slowly
Directioncontrol: Steering rotation like car

2. Using Components:
 M.S 1x1 inch square pipes
 Bar link
 Crank making
 Tires
 Tire forks
 Steering
 Screws and nuts
 Woooden plank
INTRODUCTION:
Lever drives for wheelchairs have been in common use in Europe for many years. The
typical design, which is similar to that used on a steam locomotive, uses connecting rods from
the lever to the drive wheel. Steering is accomplished by turning a handle on the lever, the
handle being connected to a front caster. Bennedik, Engel, and Hildebrandt established that this
is a more efficient method for propelling a wheelchair compared to hand rims. However, there
are some associated disadvantages. Top speed is limited by the maximum stroking rate, and it is
not possible to rest between strokes since the lever is always connected to the drive wheels. Also,
maneuvering is much more difficult in close spaces since cantering action is not possible and a

3. lever might have to be started at a position of dead center. This last feature contributes to the
difficulty in mounting a ramp from a standing start.
One of the reasons for increased efficiency probably stems from the fact that power is
applied while pushing and pulling. However, Brubaker established that by using only the push
stroke, levers could be more efficient than hand rims, particularly if the appropriate mechanical
advantage was used. To exploit this possible increase in efficiency, Bruning designed a lever
system that used a roller clutch to drive a sprocket on the drive wheel like a bicycle. This
allowed pausing between strokes as well as choosing the length of stroke. Reverse was achieved
by designing a reversing roller clutch which was controlled by pressure of the palm of the hand
for forward motion and by finger pressure for reverse. Neutral or freewheeling occurred when no
pressure was applied.
WORKING PRINCIPLE:
This type of wheel chair usage all handicapped person which is contain hand lever
propulsion and in direct back wheel connecting and single hand drive system. This type of wheel
chair drive to easy and economical purpose based design in this wheel chair. The hand lever
connecting on direct back wheel in crank shaft mechanism, when your drive to the hand lever
rotating in back wheel acting on forward motion then which is contain single hand bar drive
system. Why it is connecting one, turning cycle using single hand power method and another
hand drive to hand lever in front and back motion acting propulsion motion acting on crank shaft
system.
Declaration of Project Interest to Project Guide:
 Respected Sir/Madam,
 We are happy to work this project under your guidance, and we are interested to
develop this idea, kindly accept to allow us to this project
 THANK YOU!

4. Project Video Reference Links:
(Video proves the working of project only, size depends on cost effective)
https://www.youtube.com/watch?v=afU74a2BF-E