MEE30003 Machine Design

Harrison Bennett Joseph Thekkekkara Joshua LazaroJordan Boyle

Creative Journey: Windshield Wiper System

Introduction ▪ EVX's ultimate vision is to make self powering cars the future of transportation.

▪ Windscreen Wiper System has not yet been created that is aerodynamic enough to contribute to an overall coefficient of drag < 0.21.

2

Project Overview and Objectives

Create a windshield wiper system:

▪ Mounted onto the EVX Immortus vehicle and ready for use.

▪ Meets Australian Design Requirements

▪ Aerodynamically efficient (contribute to a cd < 0.21)

▪ Taking into consideration the actuator (weight, complexity, power consumption)

3

Approach

▪ Research:

1. The history of the windscreen wiper. Why is a windscreen wiper needed?.

2. Aerodynamics basics.

3. Different kinds of Windscreen wiper, how people have approached clearing a windscreen.

4

5

Why are Windscreen Wipers Needed?

Concepts

7

Thinking Outside the BoxUltrasonic Transducers High Pressure AirHydrophobic Coating

8

Aerodynamics Background

9

Hiding the Blades

10

Beam VS Conventional (Superstructure)

11

Blade Designs/ Ideas

13

Windscreen

14

Wiping Mechanism

15

Design Method

1. Determine dimensions of Blade.

2. Use calculations to calculate torque required to move blade.

3. Define constraints of linkage size – space .

4. Select motor – Linkage specs define motor requirements

16

▪ Refreneces:

▪ https://en.wikipedia.org/wiki/Drag_coefficient

▪ http://georgemdavison.com/inventor-you-should-know-mary-anderson/

▪ http://historyofscience2013.blogspot.com.au/2013/04/mary-anderson-1866-1953-windshield.html

http://www.tricoproducts.com/Drivers/UnderstandingWipers/Wipers101

http://www.amosunglasses.com/latest/blog/item/173-do-hydrophobic-coatings-for-sport-sunglasses-really-work

https://www.google.com.au/patents/US4928580