Small Things Make a Huge Difference
When you’re an established company like AM Equipment in a mature industry like windshield wipers, you do a lot of things because of what you’ve learned. One of the things we’ve learned a lot about is what happens when wiper arms and blades need to be very long, as they do in most commercial applications. And the sudden change of direction at the top and bottom of the wipe action generates so much force on those long arms and blades that they tend to flex, especially at high wiper speeds.
What looked like a nice wipe pattern in the design stage ends up with as much as 4 to 6 inches of pattern growth.
Pattern growth sometimes allows wiper blades to go down over the window moldings at the bottom of the pattern and whip off the edge of the windshield at the top. When that happens, it adds stresses to the system that cause premature wear on wiper arms and linkages and can even induce system failure, usually at the most inopportune time.
We Designed the 2P Plug & Play Wiper System to Control Pattern Growth
Over the years, we’ve learned that little things make a huge difference. So when we decided to make a new commercial wiper system, the 2P series, we asked ourselves, “Can we go back to our old systems to find everywhere we had a little bit of movement, a little bit of torqueing, and take that out?”
Well, when it came to the 2P series platform it turns out that, yes, we could.
Larger Diameter Pivot Shafts Eliminate Torsional Flex
We made larger diameter pivot shafts, 17mm, which is about 5/8 of an inch. Those replaced the ½ inch shafts we used before. With a larger diameter pivot shaft there was less torsional flex through the shaft.
Patented Motor Drive Arm Design
Another thing, and we patented this, was our drive arm design. We actually improved what was an industry standard for years. We eliminated one of the ball linkages making the overall pin length shorter and taking away much of the overhung load. Now in the long life of one of these systems, the pin doesn’t tip outward. We created a much longer life system without oversweep.
Diecast & Investment Cast Components
When you look at our motor bracket, it’s diecast aluminum instead of stamped steel. We’ve done that to take out all of the flex during system operation. The drive arm and pivot levers are investment cast steel which prevents flex during operation as well.
Improved Ball Socket
We put all the wear on a sleeve bearing pin and use the ball socket just for alignment. So the 2P isn’t turning in the ball socket, it’s just aligning on it. This allows us to get to some really high cycles and still not have any wear on the ball socket. That means no slop in the ball joints.