design and fabrication of electric wheelchair and modification of suitable two wheeler for...

DESIGN AND FABRICATION OF ELECTRIC WHEELCHAIR AND MODIFICATION OF SUITABLE

TWO WHEELER FOR PARAPLEGICS

PRASANT PPOST GRADUATE IN PRODUCT DESIGNE & ENGINEER

BANGALOREINDIA

GOAL - TO “REDUCE” DEPENDENCY OF PARAPLEGIC!!

Paraplegics faces difficulties in his/her day to day activities

Paraplegics?

A person who cannot move theirlower part of their body

Improving the quality of life of Paraplegic

CAUSES

Stats of Fully Developed and Developing country

Developed Country Ex., USA, Centers for Disease Control andPrevention (CDC), 2004

Prevalence

• Approximately 1.9% of the U.S. population, or some 5,596,000 people, reported some form of paralysis based on the functional definition used in the survey.

• Approximately 0.4% of the U.S. population or some 1,275,000 people reported being paralyzed due to a spinal cord injury

Causes of Paralysis and Spinal Cord Injury

• The leading cause of paralysis was stroke (29%), followed by spinal cord injury (23%) and multiple sclerosis (17%).

• Various types of accidents accounted for the great majority of spinal cord injuries.

Courtesy: www.cdc.gov

Paralysis and Spinal Cord Injury in the United

States

Courtesy:

• Disabled persons constitute about 2 per cent of the total population in our country.

Developing Country Ex., India, National Sample Survey Organisation (NSSO), 2002

Villages UrbanNumber of 4637 3354

Atleast one disable person 45571 24731

Number of disabled persons 49300 26679

% age of population 8.40% 6.10%

• The number of disabled persons in the country was estimated to be 18.49 million during July to December, 2002. They formed about 1.8 per cent of the total population.

• About 10.63 per cent of the disabled persons suffered from more than one type of disabilities.

• For every 100000 people in India, there were 1755 who were either mentally or physically disabled. Among the rural residents, the prevalence of disability was 1.85% and that among the urban, it was 1.50%. The rate for males was 2.12% and 1.67% while that for females was 1.56 and 1.31 per cent in rural and urban India, respectively.

Mental Disability Visual Disability

Hearing Disability

Speech Disability

Only

Locomotor Disability

OnlyMultiple Disability

Any DisabilityMental

Retardation only

Mental Illness only

Blindness only

Low Vision Only

Rural 2455 3643 4684 1756 5040 2757 23557 5408 49300

Urban 1387 1563 1958 787 2445 1279 14099 3161 26679

All India 3842 5206 6642 2543 7485 4036 37656 8569 75979

Difficulties faced by Paraplegics in their day to day activities

• Commuting with the home/working place• Bathroom issues• Moving ON and OFF the bed• Automobile accessibility• Shopping, Parking and Dressing

Difficulties faced by Paraplegics in their day to day activities

• Commuting with the home/working place• Bathroom issues• Moving ON and OFF the bed• Automobile accessibility• Shopping, Parking and Dressing

PROBLEM!!

WHEELCHAIR 2 WHEELER

ORIGIN OF PROBLEM!!

EXISTING MEANS

SUPER SPLENDOR

http://www.wheelchairindia.com

TVS XL MODEL- SIDE ATTACHMENT SUZUKI ACCESS 125

DISCOVER FIX ATTACHMENT

TRICYCLE

MOPED FIXATTACHMENT

OBJECTIVE OF THIS PROJECT

• This project aims at developing a low cost electric wheelchair which is capable of withstanding the rigors of the road of India and modifying a two wheeler available in the market so that electric wheelchair will be an integral part of the two wheeler enabling the paraplegic person to ride on the road.

• The Project involves making an electric wheelchair which combines an integral part of a two wheeler so that he can just attach his wheelchair to the road going vehicle without getting off of his wheelchair. Thus making him completely independent of any external help.

• The project will be focused on lowering cost for fabrication part so that if it is manufactured on a large scale, the overall price of the entire unit will be low enabling those physically handicapped people who are cash strapped to purchase the unit .

Concept 1 Concept 2

Concept 3 Concept 4

Concept 4a

Concept 4b

Concept 4c

Concept 4d

(FINAL SHORTLISTED

CONCEPT)

~3’

~2’

# PART NAME WEIGHT IN KG. QUANTITY COST IN RS.

1 Side Tube 3.398 2 142

2 Collar pivot 0.684 2 28

3 Bushing for collar 0.088 4 8

4 Cross member -1 2.928 2 123

5 U-Tube 2.308 1 97

6 U-Tube extension 0.486 2 21

7 Upper pivot for rear shock absorber 1.096 4 46

8 Seat frame angle piece 0.478 2 20

9 Controller frame flat piece 0.14 4 6

10 Arm rest flat piece 1.492 2 63

11 Tubing from front wheel fork 0.486 2 20

12 Seat pivot for back rest 0.016 2 1

13 Stop for back rest 0.069 1 3

14 Back rest lower plate 0.482 1 20

15 Rectangular tube for guide 2.521 1 106

16 Bushing for lock 0.708 4 30

17 Lateral square tube for guide 0.323 1 14

18 Rear lock 0.5 1 40

19 Battery frame 3.352 2 140

20 Battery farm support rod 0.2 2 10

21 Upper plate of back rest 3.2 1 135

22 Back rest lower plate 1.5 1 63

23 Swing arm 4.292 2 900

24 Swing arm pivot bolt rod 0.196 2 8

25 Swing arm pivot nut 0.016 2 4

26 Front fork 3.55 2 450

27 Shock absorber for front wheel 2.24 4 1210

28 Front smaller wheel 5.2 2 250

29 Shock absorber for rear wheel 3.52 4 1060

30 Rear electric powered wheel 20 2 1100031 Controller frame flat piece 0.54 2 1100

32 Three way changeover switch 2.2 2 540

33 Dry cell batteries 30 6 660034 Accelerator with brake lever system 0.5 1 500

35 8 mts. Of wiring 1 1 1000

36 Brake drum 1 2 500

37 Sliding bracket(back) 1 2 50

38 Sliding fixed plate-1 3 2 250

39 Sliding fixed plate-2 8 4 336

40 Sliding inner plate 1.2 2 50

41 Screw rod for sliding 1.3 2 300

42 Handle for sliding mechanism 0.5 2 75

43 Top bracket for sliding mechanism 0.3 2 28

44 Sliding bracket(front) 1 2 50

TOTAL 27397

SCOPE FOR FUTURE WORK

• Better interface with the controller as the existing system was just an adaptation from an electric cycle kit. Use of joystick with micro-controller controlled movement of the wheelchair will greatly enhance the driving pleasures.

• Use of alloy rims instead of spoke rims there by reducing the chances of wheel bends.

• Sliding mechanism for front wheels can be made hydraulic for ease of use

• The wheelchair can be made suitable for adaptation to all two wheelers in the market.

EXISTING PROBLEMS

• Footrest portion

• Time to assemble with 2 wheeler

• Universal Design!!!!!!!

• Expand the adaptability to 4 wheeler