MODIFIED WHEELCHAIR

Designed By: Lungile Ntshulana & Kwezi Mayikana

Lecturer: P. SnayerSubject: KOT2M2X Date: 19 August 2014

REPORT

DESIGN

DESIGN PURPOSETHE MAIN PURPOSE OF THIS DESIGN IS TO ASSIST DISABLED PEOPLE TO ALLOW THEM TO MOVE FROM POINT (A) TO POINT (B) WITHOUT ASSISTANCE ON INCLINED AND UNEVEN AREAS.

THESE AREAS INCLUDE :

STAIRCASES

STANDARD ESCALATORS

ELEVATORS

UNEVEN TERRAIN

ROUGH TERRAIN

CONCEPT FORMATION

FINAL CONCEPT DESIGN: MODIFIED

WHEELCHAIR

CONCEPT ONE

CONCEPT TWO

FINAL CONCEPT

OPERATION OF DESIGN

SPECIFICATIONSOVERALL WIDTH: 900MM

OVERALL LENGTH: 700MM

STEERING SYSTEM: RACK & PINION

BATTERY: 12V

BRAKES: ELECTRO-MECHANICAL

SEAT TYPE:RECLINING LEATHER

MOTOR: 3KW @ 1000RPM

DRIVETRAIN: GEAR-TRAIN

SUSPENSION:LINKAGE RODS

GRADE CLIMBABLE: 60 DEGREES

ACTUATING SYSTEM: LINEAR

MAX WEIGHT: 120KG

PART SELECTION

MATERIAL SELECTION

LATHE TURNING

CNC CUTTING

ASSEMBLING

MANUFACTURING PROCESS

DRIVE TRAIN STEERING SYSTEM

RACK AND PINION SYSTEM

BATTERY AND MOTOR

CHAIR AND ACTUATORS

SUPPLIES POWER TO THE MOTOR POWER SOURCE FOR ACTUATORS CONTROL SOURCE FOR CONTROL UNIT

THE BATTERYS DUTIES

COST ANALYSIS

CALCULATIONS

 

BY PRINCIPLE OF EQUILIBRIUM:

 

 ANOTHER METHOD THAT CAN BE USED FOR ESTABLISHING BALANCE IN EQUILIBRIUM IS BY TAKING MOMENTS ABOUT THE TOPPLING POINT WHICH IS THE REAR BOTTOM CORNER OF THE WHEELCHAIR. THE ANTI-CLOCKWISE AND CLOCKWISE MOMENTS ABOUT THE TOPPLING POINT WILL BALANCE.

 

BY D’ALEMBERTS PRINCIPLE:

 

 THE FOLLOWING DESIGN WILL REQUIRE A 3KW MOTOR @ 1000RPM WITH A TORQUE OUTPUT OF 28.64N.M AND A DRIVING FORCE OF 1.379KN IN ORDER TO OVERCOME ALL RESISTING OPPOSING FORCES.

FINAL ANALYSIS

FINAL ANALYSIS

A PROTOTYPE CAN BE BUILT AND

FURTHER RESEARCH ON THE

DESIGN CAN BE DONE

POTENTIAL TO BE A FEASIBLE AND GOOD DESIGN

MEETS THE STANDARD DESIGN

CRITERIA

MANUFACTURING IS THE KEY TO

THE DESIGNS SUCCESS

THE DESIGN WILL MAKE

LIVES EASIER FOR DISABLED

PEOPLE

QUESTIONS MAY NOW BE ASKED.

ASK QUESTIONS NOW

ASK QUESTIONS NOW