design and fabrication of multi-purpose wheelchair for differently-abled person

57 Pages·2012·2.37 MB·English

Visvesvaraya Technological University, Belagavi

A Project Report
on

“DESIGN AND FABRICATION OF

MULTI-PURPOSE WHEELCHAIR FOR
DIFFERENTLY-ABLED PERSON”
(KSCST Sponsored Project)
(Reference Number: 4OS_BE_0327)

submitted in partial fulfillment of the requirements for the award of degree of
BACHELOR OF ENGINEERING
in

MECHANICAL ENGINEERING

by

RAKSHITH R 4VV13ME082 S U R A J G D 4VV13ME111
RITESH N JOSHI 4VV13ME085 THRISHOOL R 4VV13ME114

Under the Guidance of
Dr. G V NAVEEN PRAKASH

B.E., M.Tech., Ph.D
Professor & PG Coordinator

Department of Mechanical Engineering
Vidyavardhaka College of Engineering
Gokulam 3rd Stage, Mysuru 570002,
Karnataka, India
2016-2017
VIDYAVARDHAKA COLLEGE OF ENGINEERING
Gokulam 3rd Stage, Mysuru - 570002, Karnataka

DEPARTMENT OF MECHANICAL ENGINEERING

CERTIFICATE

Certified that the project work entitled “DESIGN AND FABRICATION OF MULTI-

PURPOSE WHEELCHAIR FOR DIFFERENTLY-ABLED PERSON” is carried out by

RAKSHITH R 4VV13ME082 SURAJ G D 4VV13ME111
RITESH N JOSHI 4VV13ME085 THRISHOOL R 4VV13ME114

bonafide students of Vidyavardhaka College of Engineering in partial fulfillment for the
award of “Bachelor of Engineering” in Mechanical Engineering of the Visvesvaraya
Technological University, Belagavi during the year 2016-2017. It is certified that all
corrections/suggestions indicated for Internal Assessment have been incorporated in the
report deposited in the department library. The project report has been approved as it satisfies
the academic requirements in respect of Project work prescribed for the said Degree.

Dr. G V NAVEEN PRAKASH Dr. L J SUDEV D r . B S A DASHIVE GOWDA
B.E., M.Tech., Ph.D BE., M.Tech., Ph.D M.E., Ph.D
Professor & PG Coordinator Head of the Department Principal
Project Guide

EXTERNAL VIVA

Name of the Student :

University Seat No :

Name of the Examiners Signature with Date

1.

2.
ACKNOWLEDGEMENT

It is our privilege to express gratitude to all those who inspired and guided us to
complete the project work. This work would have remained incomplete without direct
and indirect help of many people who have guided us in the success of this project work.
We are grateful to them.
We are grateful to our Guide Dr. G V Naveen Prakash, Professor & PG
Coordinator, Department of Mechanical Engineering for his guidance, constant support
and encouragement in completing the project work.
We thank our project coordinators Prof. Thamme Gowda C S, Assistant
professor and Prof. Vismay K G, Assistant Professor, Department of Mechanical
Engineering for his coordination and encouragement in completing the project work.

We are grateful to Dr. L J Sudev, Professor & Head of the Department,
Mechanical Engineering and Dr. G B Krishnappa, R&D Dean, for their constant
support and encouragement in completing the project.

We take great pride in thanking Dr. B Sadashive Gowda, Principal for providing
congenial atmosphere and support for completion of our work.
We also thank our sponsor Karnataka State Council for Science and
Technology for their appreciation and support for completion of our project.

We thank all the faculties of the department, our parents and friends who helped
us directly and indirectly for the completion of our project work.

RAKSHITH R
RITESH N JOSHI
SURAJ G D
THRISHOOL R
DECLARATION

We, the students pursuing Bachelor of Engineering in Mechanical Engineering at
Vidyavardhaka College of Engineering, Mysuru, bearing the University Seat Numbers
4VV13ME082, 4VV13ME085, 4VV13ME111, 4VV13ME114, hereby declare that the
project work entitled “DESIGN AND FABRICATION OF MULTI-PURPOSE
WHEELCHAIR FOR DIFFERENTLY-ABLED PERSON” embodies report of the project
carried out by us at Vidyavardhaka College of Engineering, Mysuru, during the 8th semester
Bachelor of Engineering under the guidance of Dr. G V NAVEEN PRAKASH, Professor &
PG Coordinator, Department of Mechanical Engineering. No part of this project is submitted
for the award of degree or diploma in any university or institution previously.

Place: Mysuru
Date:
RAKSHITH R
(4VV13ME082)

RITESH N JOSHI
(4VV13ME085)

SURAJ G D
(4VV13ME111)

THRISHOOL R
(4VV13ME114)
ABSTRACT

One of the basic problems of user on manual wheelchair is overcoming architectural
barriers (kerbs, stairs etc.) on its way. Even though many research studies have been reported
in different fields to increase the independence of wheelchair users, the question of overcoming
obstacles by a wheelchair always remains as topic of discussion for many researchers. In our
project a motor operated stair climbing wheelchair concept which can overcome the
architectural barriers to a considerable extent has been developed. This project involves the
design of an ergonomically designed battery powered wheel chair for multipurpose use. Stair
climbing functionality is embedded in the design through its structure and mechanism. All the
design parameters of wheelchair were based on the standard design of the stairs in India. Major
part of the project focuses on the proposed design concept and concludes by discussing upon
the physical working model developed for the proposed design solution.

Keywords: Architectural barriers, motor operated, stair climbing
CONTENTS

Chapter Page
Title
No. No.
1 INTRODUCTION 1-8
1.1 Wheelchair 1
1.1.1 History 1
1.1.2 Types of wheelchairs 1
1.1.3 Limitations 5
1.2 Stairs 6
1.2.1 Standard stair size 8
2 LITERATURE SURVEY 9-18
2.1 Manual wheelchairs with stair-climbing capabilities 9
2.2 Power wheelchairs with stair-climbing capabilities 13
2.2.1 Wheelchairs that use wheels or wheel clusters to climb 13
2.2.2 Wheelchairs and wheelchair carriers that use legs to climb 15
2.2.3 Wheelchairs and wheelchair carriers that use a rubber track to climb 16
2.3 Summary 18
2.4 Objective 18
3 METHODOLOGY 19-32
3.1 Description 19
3.2 Principle Parts 19
3.2.1 Frame 22
3.2.2 Lobe wheels 24
3.2.3 Chair 28
3.2.4 Gear motor 28
3.2.5 Transmission system 30
3.2.6 Assembly 30
4 WORKING MECHANISM 33-36
4.1 Calculations 35
5 RESULTS & DISCUSSION 37-39
5.1 Advantages & Disadvantages 38
5.2 Applications 38
5.3 Engineering practices 39
5.3.1 Human Safety 39
5.3.2 Environmental impact 39
5.3.3 Ethical practices 39
5.3.4 Cost Consideration 39
6 BILL OF MATERIALS 40
7 CONCLUSIONS 41
8 FUTURE SCOPE 42
REFERENCES 43-44
ANNEXURE – I 45-46
ANNEXURE – II 47
LIST OF FIGURES

Figure Page
Description
No. No.
1.1 Manual self-propelled wheelchair 2
1.2 Manual attendant-propelled wheelchair 2
1.3 Powered wheelchair 3
1.4 Mobility scooter 3
1.5 Single arm drive wheelchair 4
1.6 Reclining wheelchair 4
1.7 Sports wheelchair 5
1.8 All-terrain wheelchair 5
1.9 Stair terminologies 7
1.10 Standard stair size 8
2.1 Ernesto Blanco's Wheelchair Climbing a Staircase 9
2.2 Manuscale Wheelchair 10
2.3 Vardaan Manual Stair-Climbing Wheelchair 1 1
2.4 Stairbike Climbing a Staircase 1 2
2.5 Zenith 3D Model 12
2.6 TGR Scoiattolo 2000 Wheelchair 13
2.7 Independence iBOT 4000 Mobility System 14
2.8 OB-EW-001 Observer Maximus 15
2.9 Zero Carrier Wheelchair 15
2.10 C-MAX U1 Climbing a Staircase 16
2.11 TopChair Wheelchair Descending a Staircase 16
2.12 TGR Explorer Powered Wheelchair 17
2.13 Stairmax Wheelchair Carrier 17
3.1 Frame design 20
3.2 Frame dimensions 21
3.3 Total deformation of the frame 21
3.4 FOS of the frame 22
3.5 Fatigue FOS of the frame 22
3.6 Maximum principal stress of the frame 23
3.7 Maximum principal strain of the frame 23
3.8 Human gait cycle 24
3.9 Wheel design 25
3.10 Wheel dimensions 25
3.11 Total deformation of the wheel 26
3.12 Maximum principal stress of the wheel 27
3.13 Maximum principal strain of the wheel 27
3.14 Seat tilting mechanism 2 8
3.15 Motor connection 2 9
3.16 Assembled wheelchair: Isometric view 3 0
3.17 Assembled wheelchair: Front view 3 1
3.18 Assembled wheelchair: Top view 3 1
3.19 Assembled wheelchair: Side view 3 2
4.1 Working mechanism 33
4.2 Mechanism top view 3 4
LIST OF TABLES

Table Page
Description
No. No.
3.1 Properties of mild steel 20
3.2 Analysis parameters 23
3.3 Results of analysis 24
3.4 Properties of plywood 26
3.5 Specification of motor 29
3.6 Battery specifications 29
4.1 Chain, sprocket and center distance calculation 36
5.1 Results 37
6.1 Bill of materials 40