Talking about the Design of the Wiper System for Buses

The auto wiper system is an important accessory to the body. Its function is to automatically wipe off the rain, dust and other dirt attached to the windshield to ensure the clear field in front of the driver and the safety of driving. .
Design of water wiper system for bus
1. Determination of scraping area
The wiper system is set on the bus to allow the driver to have a good vision while driving in rainy and snowy weather, so that the driver can see the front scenery and rearview mirror clearly through the glass wiped by the water wiper, so there must be a large enough water wiper area
2. Determination of scraping degree
Wipe clarity is an important indicator for evaluating the wiper system.
There are several factors that affect the scraping degree.
The pressure of the water wiper on the glass When the wiper is wiped, a thin water film is formed on the surface of the glass, so that the wiper does not directly contact the glass. The water film is thin and the thickness is uniform, and the glass can be wiped clearly. It depends on how much pressure the blade has on the glass. When the pressure is small, the water film is thick, and the corrugated glass is easy to be blurred; when the pressure is large, the frictional force increases, which will destroy the water film and affect the vision.
The water wiper frequency. The scraping frequency is too high or too low. When the frequency is too high, the bending of the rubber strip increases, and the water film is thickened from "wiping" to "sweeping", which makes people dazzled. If the frequency is too low, waves will be formed because the water stays on the glass for a long time. Practice has proved that the frequency of scraping is generally 4560 times/min.
Wiper bracket. The windshield glass of the bus is mostly hyperboloid glass with a large curvature change, and the curvature changes continuously during the swinging process of the water wiper on it. Therefore, the water wiper bracket is generally designed as a multi-pivot structure to ensure that the pressure of the wiper blade acts on the glass evenly. In addition, due to the difference in the amount of water attached to the windshield (wet state, dry state and semi-dry state), the friction coefficient between the brush rubber and the glass is also different, so the wiper bracket must have the ability to withstand large loads.
3. The angle between the wiper shaft and the wind
The position of the wiper shaft on the side view should be perpendicular to the glass surface, and if the glass is hyperboloid, it should be perpendicular to the chord. It should be consistent with the glass normal in the top view so that the scraper can be pressed substantially vertically on the glass.
4. Selection of wiper motor
Wiper motors mostly use two-speed DC ferrite permanent magnet motors.
The wiper motor should be selected within the motor load.
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