Introduction: Feel Safe Wheelchair
This instructables guides you through how to design and prototyping an innovative wheelchair - Feel Safe Wheel Chair. The design of the Feel Safe Wheel Chair is derived from the concept of an airport trolley. The brake is automatically engaged when the wheelchair is unattended. Movement of the handbrakes disengages each brake via a brake linkage, allowing individual wheel to rotate.
The feel Safe Wheelchair adopts an “AND” function operation system for added safety feature purpose. It requires both handbrakes to be depressed in order to move.
With little time and some basic knowledge of Autodesk Fusion 360, anyone can take concept design into CAD – where you can use them for modelling and aids in prototyping your very own innovations.
Using Autodesk Fusion 360, you'll be taken step by step through the process of how to design the “Feel Safe Wheel Chair”. Finally, you'll will be shown the actual prototype based on the CAD modelling created using Fusion 360.
•Bicycle hand brake with cables v
•Galvanised steel pipes
•Adjustable wheelchair leg rest
•Bolts and nuts
•Customised braking system – Straight Knurled aluminium bushings, spring, aluminium brackets
Step 1: Creating the Base Frame
Step 2: Creating the Top Structure
Step 3: Creating the Chair Frame
Step 4: Assembling the Right Wheel
Step 5: Assembling the Left Wheel
Step 6: Assembling the Right Castor Wheel
Step 7: Assembling the Left Castor Wheel
Step 8: Asembling the Left Bracket
Step 9: Assembling the Left Knurled Bush
Step 10: Assembling the Left Spring
Step 11: Assembling the Right Brake Set
Step 12: Assembling the Right Brake Handle and Cable
Step 13: Assembling the Left Brake Handle and Cable
Step 14: Assembling the Right Adjustable Leg Rest
Step 15: Assembling the Left Adjustable Leg Rest
Step 16: Assembling the Chair Seat
Step 17: Add Rendering to the Model
Step 18: Set Up a Motion Study
To ensure that our design is going to work the way we want, we set up a motion study to analyze the rotation of the different parts in our assembly.
As can be seen from this animation, we want to test 3 things moving or stopping at the same time, namely, the brake handles, knurled bushings and wheels. We want to test the interactions between these 3 parts.
The brake should automatically be engaged when the brake handle is released and vice versa.
6 Different joints are used to drive the motion study. These joints are driven through time by either an angle.
One major advantage of our INVENTION is that it simple and can be retrofitted into any existing wheel chairs.