CN202124021U - Dry-scraping preventing system of car windshield wiper - Google Patents

Abstract

In the vehicle wiper anti-dry scraping system described in the utility model, a one-way valve is added in the wiper liquid supply pipeline, that is, between two cleaning operations, the one-way valve overcomes the gravity of the washing liquid to prevent it from flowing back into the water tank, thereby Washing liquid flows out at the beginning of the wiper action, avoiding the damage to the windshield caused by the dry scraping action of the wiper, and correspondingly improving the service life of the wiper blade and the windshield. The vehicle wiper anti-dry scraping system includes a wiper device for cleaning the surface of the window, a water tank for storing washing liquid, and a liquid supply pipeline and a water pump for supplying the washing liquid from the water tank to the surface of the window. A one-way valve that restricts the reverse flow of washing liquid back into the water tank is arranged on the liquid supply pipeline.

Description

Vehicle wiper anti-dry scraping system

technical field

The utility model relates to a wiper anti-dry scraping system applied to rail vehicle window cleaning, which belongs to the field of mechanical manufacturing.

Background technique

Rail vehicles currently used in China, such as EMUs, subways and urban light rails, are usually provided with a wiper device at the front of the cab. During the operation of the vehicle, impurities such as dust, rain and snow will accumulate on the window, and the pipeline of the wiper device will send washing liquid or water flow to the surface of the windshield, and use the scraper to repeatedly scrape the surface of the glass for cleaning, thereby improving the performance of the vehicle. Driver visibility and clarity.

Due to the long liquid supply pipeline of the existing wiper device, the wiper blade always moves first every time the wiper device is started, and then the washing liquid or water flow can flow out of the liquid supply pipeline, and the dry scraping action of the wiper blade is easy to scratch the windshield The coating on the glass surface affects the service life of the wiper blade and windshield.

In view of this, this patent application is proposed.

Utility model content

The vehicle wiper anti-dry scraping system described in the utility model is designed to solve the above problems and deficiencies by adding a one-way valve in the wiper liquid supply pipeline, so that the cleaning fluid can be overcome by the one-way valve between two cleaning operations. Gravity prevents it from flowing back to the water tank, so that the washing liquid flows out at the beginning of the wiper blade action, avoiding the damage to the windshield glass caused by the dry scraping action of the wiper blade, and correspondingly improving the service life of the wiper blade and windshield glass.

In order to achieve the above design purpose, the vehicle wiper anti-dry scraping system mainly includes:

wiper units for cleaning the surface of the window,

tanks for washing liquid,

And the liquid supply line and water pump that supply the washer liquid from the water tank to the window surface.

The difference from the prior art is that a one-way valve is set on the liquid supply pipeline to limit the reverse flow of the washing liquid back into the water tank.

Based on the above basic scheme, after the wiper blade of the wiper device completes a washing cycle on the windshield surface of the car window, the one-way valve will prevent the washing liquid from flowing back into the water tank by virtue of its gravity, that is, it will always remain in the liquid supply pipeline. There is washing liquid.

When the wiper blade of the wiper device is started again, the washer liquid can flow out from the liquid supply pipeline immediately, thereby lubricating between the wiper blade and the windshield of the vehicle window, and preventing dry scraping on the surface of the windshield .

In order to further improve the control effect of overcoming the gravity of the washing liquid, the one-way valve can be arranged between the wiper device and the water pump, that is, to ensure the pressure control of the part of the liquid supply pipeline near the scraper, that is, at least the part near the scraper. Washing fluid is always retained in the liquid supply line section.

As mentioned above, the utility model vehicle wiper anti-dry scraping system has the advantages of:

1. It effectively solves the problem of dry scraping of the wiper blade. It can ensure that there is always a supply of washing liquid at the beginning of the wiper blade action, which can completely avoid scratching the windshield glass due to dry scraping, and improve the use of wiper blades and windshield glass. life.

2. The added one-way valve has little improvement on the existing vehicle wiper control system, does not affect the manufacturing cost of the overall device, has a simple structure and high cleaning efficiency.

Description of drawings

Now in conjunction with following accompanying drawing, the utility model is described further

Fig. 1 is the schematic diagram of described wiper anti-dry scraping system;

As shown in FIG. 1 , a wiper device 1 , a liquid supply pipeline 2 , a one-way valve 3 , a water pump 4 , a water tank 5 , and a washing liquid 6 .

Arrows in FIG. 1 indicate the flow direction of the washing liquid 6 .

Detailed ways

Embodiment 1, as shown in Figure 1, the vehicle wiper anti-dry scraping system mainly includes:

A wiper device 1 for cleaning the surface of a vehicle window,

Store the water tank 5 of washing liquid,

The liquid supply line 2 and the water pump 4 that supply the washing liquid from the water tank 5 to the window surface,

On the liquid supply pipeline 2 , between the wiper device 1 and the water pump 4 , a one-way valve 3 is arranged to limit the reverse flow of the washing liquid back into the water tank 5 .

After the wiper blade (not shown in the figure) of the wiper device 1 completes a cleaning process on the surface of the windshield, the one-way valve 3 prevents the washing liquid 6 from flowing back into the water tank 5 by its gravity, that is, in the liquid supply pipeline 2 Washing fluid 6 remains at all times.

When the wiper blade of the wiper device 1 is started again, the washer liquid 6 can flow out from the liquid supply pipeline 2 immediately, so as to prevent dry scraping on the surface of the windshield.

Describe again below about overcoming the gravitational problem that washing liquid 6 flows back to water tank 5.

In order to achieve the above-mentioned cleaning liquid 6 always remaining in the liquid supply pipeline 2, that is, to use the cut-off function of the one-way valve 3, it is necessary to consider that the cleaning liquid 6 remains in the pipeline between the water tank 5 and the liquid inlet of the one-way valve 3. Liquid 6.

At this moment, the atmospheric pressure force should be greater than the gravity of the washing liquid 6, so as to ensure that the washing liquid 6 will not flow back to the water tank 5 by its own gravity, then Q>W must be satisfied, where Q is the atmospheric force, and W is the gravity of the washing liquid.

Derived in turn, that is, P×S>M×G, where P is the atmospheric pressure, and P is about 101325Pa; S is the cross-sectional area of the liquid supply pipeline 2; M is the pipe between the water tank 5 and the water inlet of the one-way valve 3 The quality of washing liquid 6 in the road; G is the acceleration of gravity, and G is 9.8m/s ² ;

Furthermore, P×S>ρ×S×H×G, where ρ is the density of the washing liquid, about 0.9×10 ³ Kg/m ³ ; H is the vertical height between the water tank 5 and the water inlet of the one-way valve 3 .

Thus P>ρ×H×G,

H<P/(ρ×G),

The final H<11.488m.

Since the overall height of the current rail vehicle does not exceed 4.5 meters, when the vehicle wiper anti-dry scraping system of the utility model is adopted, the cleaning liquid 6 remains in the entire liquid supply pipeline 2 all the time.

Claims (2)

1. A vehicle wiper anti-dry scraping system, comprising a wiper device (1) for cleaning the window surface, a water tank (5) for storing washing liquid (6), and providing washing liquid from the water tank (5) to the window surface (6) The liquid supply pipeline (2) and the water pump (4) are characterized in that: on the liquid supply pipeline (2), a one-way valve that restricts the reverse flow of the washing liquid (6) back to the water tank (5) is set. valve (3). 2. The vehicle wiper anti-dry wiper system according to claim 1, characterized in that: the one-way valve (3) is arranged between the wiper device (1) and the water pump (4).

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