cam presentation
TRANSCRIPT
1
Automobile windshield wiper mechanism: Single wiper of new Mercedes
By Gopi Krishna Mandadi
Shravani Kasaragadda
Goutham Chinni
2
About
• windshield wiper is a device used to remove rain and debris from a windscreen or windshield
• Almost every motor vehicle is equipped with wipers and also it’s a legal requirement.
3
• It cleans out unnecessary elements that pose as distractions to the focused driving vision of a Mercedes owner.
• The blade is swung back and forth over the glass, pushing water and other elements from its surface.
• The assembly consists of: the arm pivoting at one end, the motor that powers the assembly the blade that attaches to the arm.
4
• Most automobiles use two synchronized radial type arms, while many commercial vehicles use one or more pantograph arms.
• To note, Mercedes-Benz pioneered a system called the "Monoblade" where in a single wiper extends outward to get closer to the top corners, and pulls in at the ends and middle of the stroke, sweeping out a somewhat 'W'-shaped path.
Single wiper of new Mercedes
5
Design
In fact, it is very difficult to get a 4 bar mechanism to rotate an output link by 160 deg. It will quickly jam with a little wear.
6
How about a 6 bar mechanism?
7
• So, the motion needs to extend and retract as it rotates across the windshield.
8
How about a crank slider
• The wiper is the slider• The crank rotates 4X faster than the wiper to give
the desired wiper motion
9
Trial’s
10
Trial 2
11
Wiper Video
12
Trial 3
13
14
Windshield wiper Mercedes
15
16
Thank You….