RU2449907C2 - Automotive windshield wiper - Google Patents

Abstract

FIELD: transport.

SUBSTANCE: invention relates to automotive industry. Proposed wiper comprises movable valve to drive axle with its one end supporting windshield brush rigidly secured thereon, slide valve mechanism, switch, throw-over mechanism to vary direction of movable valve travel and check valve. Wipe case consists of left and right chambers communicated with vacuum line and atmosphere. Wipe is communicated via vacuum line, check valve and vacuum receiver with set of ejectors. Check valve is intended for automatic disconnection of vacuum drive from set of ejectors with engine shutdown. Duration of wiper operation with shutdown engine depends upon inner volume of receiver.

EFFECT: higher efficiency.

5 dwg

Description

The invention relates to mechanical engineering and, in particular, to the automotive industry.

Known devices (Shestopolov K.S. and others. The device and the operation of the car. M: DOSAAF. 1974, p.230), consisting of brushes, drive rods, vacuum drive, spool mechanism.

The disadvantage is that the device operates from a vacuum generated in the suction pipe of a working internal combustion engine.

The closest analogue is the device (Anokhin V.I. Domestic cars. M .: Mechanical engineering. 1964, p. 612, Fig. 412), consisting of a housing, a cover, a movable valve, a spool mechanism, a switch.

The disadvantage is the wear of parts of the cylinder-piston group of the engine. reduces the efficiency of cleaning the windshield.

The technical solution is achieved due to the fact that the windshield wiper device of the car is equipped with a block of ejectors with a replaceable number of ejector sections; an ejector block is located between the exhaust pipe of the vehicle’s internal combustion engine and a check valve; the volume of the vacuum receiver regulates the duration of the wiper when the internal combustion engine is not working.

The technical result is achieved due to:

- ejectors block connected in series to the exhaust pipe of the exhaust gases of the internal combustion engine;

- elimination of the influence of wear of parts of the cylinder-piston group of the engine;

- exclusion of the impact of the work of the internal combustion engine in idle mode.

The invention is illustrated by drawings, where in Fig. 1 is a diagram of a device of a block of ejectors, Fig. 2 is a diagram of a connection of a device to an exhaust pipe of an internal combustion engine, and Fig. 3 is a diagram of a vacuum wiper drive.

The device consists of a block of ejectors 1 to create a vacuum from a moving stream of exhaust gases of a traction engine. 16 vehicles, ejector sections 2, 3, 4, 5 to increase (or decrease) the created vacuum, ejectors 6, 7, 8, 9; the gaps 10, 11, 12 between the ejectors; casement valves 13, 14, 15 for automatic regulation of the amount (set by the vehicle manufacturer) of the vacuum in the ejectors block, a check valve 17 for automatically disconnecting the wiper 18 vacuum drive from the ejectors block 1 with the engine not working 16; the housing 19, the cover 20, the movable valve 21 for actuating the axis 22, the spool mechanism 23, the switch 24, the exhaust pipe 25, the receiver 26 for vacuum, a silencer 27, a pointer 28, the left cavity 29, the right cavity 30, the vacuum pipe 31, buttons 32 for driving the constituent elements in the spool mechanism 23, the toggle mechanism 33 for changing the direction of movement of the movable valve 21, the pointer 34 vacuum, pointer 35 air from the atmosphere.

The operation of the device. Traction d.v.s. 16 works as follows. Check valve 17 is open. The exhaust gases from the exhaust pipe 25 enter the ejector unit 1 through the pipeline, namely to the ejector section 2, where the ejector 6 with the smallest nozzle diameter is located. According to the law, the exhaust gases were driven, moving under excessive pressure and passing through the ejector 6 with a higher speed, at the moment of overcoming the gap 10, air was sucked from section 3, creating a vacuum coming from the pipeline 43 through the open shutter valve 13. Having passed the ejector 6 and received additional acceleration , the exhaust gas stream passes through the ejector 7, at the outlet, overcoming the gap 11, sucks in air from section 4. Having received additional acceleration, the exhaust gases pass through the ejector 8, overcome the gap 12, suck in the air yx from section 5, more exhaust gases under excess pressure and increased speed comes in muffler 27, and then the pointer 28 in the environment.

Therefore, a vacuum is created in the ejector unit 1, which enters through the non-return valve 17, the vacuum receiver 26 to the wiper 18. The resulting vacuum in the ejector unit 1 is not always used by the wiper 18. For this reason, the shutter valves 13, 14, and 15 will automatically start to close alternately moreover, starting from section 5, where the ejector 9 is located, having the largest nozzle diameter, in which the pressure is lower in comparison with the pressure in the ejectors 8, 7, 6.

Thus, the vacuum does not exceed the value previously provided by the vehicle manufacturer.

When the wiper 18 is turned off the left cavity 29 through the channels and the spool mechanism 23 communicates with the atmosphere, and the right cavity 30 with a vacuum pipe 31, which is connected to the block of ejectors 1. A vacuum is maintained in the right cavity 30, as a result of which the movable valve 21 is kept in the original position.

When pulling the button 32 of the switch 24, the left cavity 29 is connected to the vacuum pipe 25, and the right cavity 30 to the atmosphere. Moreover, in the left cavity 29 there will be a vacuum, and in the right cavity 30 there is air from the environment. Under the action of the difference of forces acting on the movable valve 21, the latter moves in the housing 19, turning the axis 22, at one end of which a brush (not shown) is rigidly fixed to clean the windshield.

When the movable valve 21 will be in the extreme position of the left cavity 29, the toggle mechanism 33 will move the spool mechanism 23.

From this moment, the right cavity 30 is connected to the vacuum pipe 25, synchronously the left cavity 29 is connected to the environment. The movable valve 21 begins to move, and the axis 22 rotates with it. The brush cleans the surface of the windshield of the car. When you move the button 32 to its original position (i.e., the original), the operation of the wiper 18 will stop.

When idle 16 and the presence of vacuum in the receiver 26, the wiper 18, if necessary, can work. The duration of work depends on the internal volume of the receiver 26.

Claims (1)

A vehicle windshield wiper device comprising a movable valve for driving an axis, at one end of which a windshield cleaning brush is fixed, a spool mechanism, a switch, a flip mechanism for changing the direction of movement of the movable valve, the housing consists of a left and right cavity, which connected to a vacuum pipe and atmosphere, characterized in that the check valve is designed to automatically disconnect the wiper vacuum drive from the block of ejectors and the engine is running, the wiper connected to the vacuum conduit through a check valve and a vacuum receiver unit with ejectors, the duration of the wiper operation when the engine is not running and the presence of dilution depends on the internal volume of the receiver.

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