Single actuator Wiper design to wipe a surface area

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SUMMARY

The discussion focuses on designing a single actuator wiper mechanism to effectively cover a surface area of 1,600,000 mm². The user initially attempted to use the Mercedes Mono Wiper mechanism, achieving only 41% coverage. They are exploring the use of crank-rocker 4-bar linkages and the Whitworth quick return mechanism to facilitate both horizontal and vertical movement of the wiper. The goal is to create a linkage system that allows the wiper to cover the entire area efficiently, akin to a bouncing ball covering all spots in a defined space.

PREREQUISITES
  • Understanding of crank-rocker 4-bar linkages
  • Familiarity with the Whitworth quick return mechanism
  • Basic principles of mechanical motion and actuation
  • Knowledge of linkage mechanisms and their applications
NEXT STEPS
  • Research advanced designs of crank-rocker 4-bar linkages for improved coverage
  • Explore the mechanics of the Whitworth quick return mechanism in detail
  • Investigate alternative actuation methods for linkage systems
  • Study the dynamics of motion in mechanical systems to optimize wiper movement
USEFUL FOR

Mechanical engineers, product designers, and anyone involved in the design of automated wiping systems or similar mechanical linkages.

Brlala
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I'm given this problem to solve with the assumption as stated above. The answers need not be logical as long as the linkage mechanism can be simulated. I've attempted the question using Mercedes Mono Wiper mechanism but only manage to cover 41% given the width of the wiper. May I ask if there are any ideas or reference for me to look into to cover as much of the area as possible while satisfying all the criteria?

Area of parallelogram surface area=1,600,000 mm2
Area of covered area assume swiping half circle=663,747 mm2

Reference used:
 
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jack action said:
Study linkages, especially crank-rocker 4-bar linkages.
Thank you for pointing towards the direction. I'm currently looking into the linkage mechanism in the link given and will post back once I figure the connection out. :smile:
 
jack action said:
Study linkages, especially crank-rocker 4-bar linkages.

I broke down the question into 2 parts which is moving the wiper platform left and right+moving the wiper platform up and down. So like a bouncing DVD logo we see on TV, eventually it will travel through all possible locations on the screen.
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To move the wiper left and right

1. The actuator will produce a rotation motion along x axis.
2. The rotating Traverse Roll will move the platform left and right.
Reference:

Now we need to move the wiper up and down.

3. Using the Whitworth quick return mechanism to produce a left to right movement.
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4. The left right movement produced will operate and move the wiper attached to the scissors table up and down.
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I've made a crude sketch of what I have came up with. However I have a problem linking the rotating circle to the actuator.
Things I considered are
1) belt (not possible because the platform is moving from left to right constantly)
2) rack and pinion (the movements of the wiper is constant this way and will not be able to cover the whole wiper surface.)
My concept of this would be to operate like a bouncing ball in a box. Eventually the ball will cover all the possible spots on the screen.

Need help connecting from the actuator to making the circle on a left right moving platform rotate. Thank you