WO2021197007A1

WO2021197007A1 - Pneumatic rotary automotive windscreen wiper

Info

Publication number: WO2021197007A1
Application number: PCT/CN2021/079998
Authority: WO
Inventors: 屈政
Original assignee: 屈政
Priority date: 2020-04-01
Filing date: 2021-03-10
Publication date: 2021-10-07
Also published as: CN111391788B; CN111391788A

Abstract

The present invention relates to the technical field of automotive accessories, and provides a pneumatic rotary automotive windshield wiper, comprising: a pneumatic rotary arm that is easy to replace, firm in connection and good in air tightness, a main control arm containing a hollow guide path, a positioning motor, an air pump, a water pump, a location sensor, and an electromagnet deceleration system. The pneumatic rotary automotive windscreen wiper is mainly characterized in that an existing single-arm or double-arm swinging mode of scraping off rain and snow foreign matters using a rubber wiper blade is changed to a working mode that the main control arm is used for positioning and the rotary arm rotatably uses high-pressure airflow to uninterruptedly remove the rain and snow foreign matters. The pneumatic rotary automotive windshield wiper is also characterized in that the pneumatic rotary automotive windshield wiper is integrated with an automotive water spraying device.

Description

Pneumatic rotating automobile windshield wiper

Technical field

The invention belongs to the technical field of auto parts, and in particular relates to a pneumatic rotary windshield wiper for automobiles.

Background technique

Most of the existing car windshield wiper designs are swing designs, that is, 1-2 wipers work together to remove rain and snow foreign matter for the windshield, so that the driver can obtain a clear line of sight. However, in real life, when the rainfall is heavy, such a mechanism has no effect on removing rain, no matter how fast the oscillation frequency and speed are. The driver can only slow down and even stop, waiting for the rain to decrease. This brings many hidden dangers to safety. Brings a lot of trouble to traffic. In addition, most of the design of automobile windshield wipers uses a rubber wiper to contact the windshield to remove rain. Easy to wear, often replaced, easy to damage the windshield. This is not only environmentally friendly, but also increases maintenance costs.

Most of the design of the car windshield wiper is separate from the water spray device, and each is a separate system. The position of the nozzle of the water spray device is fixed, so the direction and drop point of the water spray are also fixed, and the wetting range is small and limited, and the operation of the wiper can only be used to expand the wetting range. Drivers often need to spray water multiple times to achieve the cleaning purpose. This will blur the line of sight, distract the driver, and waste water resources.

Summary of the invention

In order to solve the above technical problems, the present invention provides a pneumatic rotary windshield wiper for automobiles, which is particularly suitable for various transportation vehicles where windshields need to be cleared of rain and snow.

The technical scheme adopted by the present invention is: a pneumatic rotary automobile windshield wiper, including a rotary arm, a main control arm, a water supply system and an air supply system. The rotary arm and the main control arm are connected by a bearing structure, and the inner hollow The arm and the main control arm are connected to each other, and the other end of the main control arm is connected with the water supply system and the air supply system.

Preferably, the side wall of the rotating arm is provided with a connecting protrusion protruding outward, the side wall of the main control arm is provided with a connecting groove protruding, and the connecting protrusion and the connecting groove are connected by a rolling bearing;

Preferably, the connecting protrusion is arranged in the middle of the rotating arm;

Preferably, the connecting groove is provided at one end of the main control arm.

Preferably, an air outlet is provided on the rotating arm, and the air outlet includes one, two or more strip-shaped holes, or a plurality of point-shaped holes.

Preferably, the angle formed by the plane formed by the air outlet to the axis of the rotating arm and the axis of the connecting protrusion itself is set to ∠α, ∠α is 0-90°, including 0° and not including 90°.

Preferably, both ends of the rotating arm are inclined surfaces, and the inclined surface is provided with an inclined surface air outlet, and the inclined surface air outlet includes one or more strip holes or one or more point holes.

Preferably, lateral air outlets are provided on the side walls at both ends of the rotating arm, and the two lateral air outlets are respectively arranged on both sides of the axis of the rotating arm.

Preferably, the main control arm is hollow to form a transmission pipeline or is provided with a tubular transmission pipeline, and the water supply system and the gas supply system are connected to the transmission pipeline through a Y-shaped three-way connector.

Preferably, the air supply system includes an air pump and a heater, and the air duct connects the air pump, the heater and the Y-shaped three-way connector in series in sequence;

The water supply system includes a water storage tank and a water pump. The water pipe connects the water storage tank, the water pump, the one-way valve and the Y-type three-way connector in sequence.

Preferably, it also includes an electromagnet deceleration system, including an electromagnet arranged on the side wall of the main control arm and a magnetically permeable material arranged on the rotating arm. The magnetic material matches the position of the electromagnet, and the electromagnet is connected with a power supply controller.

Preferably, a position sensor and a positioning motor are also provided on the main control arm.

The advantages and positive effects of the present invention are:

1 The main control arm is used for positioning, the swivel arm is rotated to replace the traditional single or double arm swing, and the high-pressure airflow is used to continuously remove rain and snow foreign matter, with high removal efficiency, even in the case of heavy rainfall, it will be driving The staff provides a very clear vision. This greatly eliminates the hidden dangers of driving safety, and greatly reduces the possibility of traffic jams;

2 Use high-pressure air to remove rain and snow foreign objects on the windshield, so the rotating arm does not touch the windshield, so it will not damage the windshield, and there is no need to replace the rubber blade frequently, which reduces maintenance costs and is environmentally friendly clean;

3. Combining the pneumatic rotary car windshield wiper and the car water spray device into one, the water and air are mixed to form an air knife containing many small water droplets, so as to achieve the purpose of wetting and removing foreign objects on the windshield at the same time. This greatly improves the working efficiency and effective wetting range of the water spray device, does not distract the driver, and saves water and environmental protection at the same time;

4 The installation position of the pneumatic rotary car windshield wiper can be placed in any reasonable position at will. This is more conducive to the obstacles in the design caused by the car wiper in the car design process, and thus more conducive to the overall design of the car, especially the fluid design and appearance design of the windshield and the hood.

Description of the drawings

Figure 1 is a schematic structural diagram of an embodiment of the present invention;

Figure 2 is a schematic diagram of the structure used in an embodiment of the present invention;

Figure 3 is a schematic diagram of the structure used in an embodiment of the present invention;

4 is a schematic diagram of a radial cross-sectional structure of a rotating arm according to an embodiment of the present invention;

5 is a schematic diagram of a radial cross-sectional structure of a rotating arm according to an embodiment of the present invention;

Fig. 6 is a schematic view of an axial cross-sectional structure of a rotating arm according to an embodiment of the present invention;

FIG. 7 is a schematic view of an axial cross-sectional structure of a rotating arm according to an embodiment of the present invention;

FIG. 8 is a schematic diagram of the structure of a rotating arm according to an embodiment of the present invention;

Figure 9 is a schematic view of the structure of a rotating arm according to an embodiment of the present invention;

Figure 10 is a schematic view of the structure of a rotating arm according to an embodiment of the present invention;

Figure 11 is a schematic view of the structure of the rotating arm of an embodiment of the present invention.

In the picture:

1. Rotating arm 2. Rolling bearing 3. Main control arm

4. Transmission pipeline 5. Positioning motor 6. Air duct

7. Air pump 8. Water pump 9. Check valve

10. Water pipe 11. Water storage tank 12. Air outlet

13. Electromagnet 14. Magnetically conductive material 15. Power supply controller

16. Position sensor 17. Horizontal air outlet 18. Y-type three-way connector

19. Connection groove 20. Heater 21. Connection protrusion

22. Inclined air outlet 23. Windshield 24. Working position

25. Non-working position

Detailed ways

The embodiments of the present invention will be described below in conjunction with the drawings.

As shown in Figure 1, the present invention relates to a pneumatic rotary automobile windshield wiper. Its main function is to remove rain and snow foreign matter while rotating. It includes a rotating arm 1, a main control arm 3, a water supply system and an air supply system. The arm 1 and the main control arm 3 are connected by a bearing structure. The bearing structure can be a rolling bearing 2 so that the rotating arm 1 can rotate in a circle. The rotating arm 1 and the main control arm 3 arranged in the hollow pass through each other. They are all tubes, which can be designed in any shape to meet the design requirements of aerodynamics, and can be used for ventilation or water flow. The other end of the main control arm 3 is connected to the water supply system and the air supply system. The main control arm 3 is hollow to form a transmission pipeline 4 or is provided with a tubular transmission pipeline 4. The water supply system and the gas supply system are connected to the transmission pipeline 4 through a Y-shaped three-way connector 18.

The side wall of the rotating arm 1 is provided with a connecting protrusion 21 protruding outward, the side wall of the main control arm 3 is provided with a connecting groove 19 protruding, the connecting protrusion 21 and the connecting groove 19 are connected by a rolling bearing 2, and the side wall of the main control arm 3 is provided with protruding The connecting groove 19 is used to connect the rolling bearing 2 of the rotating arm 1 and the main control arm 3 into it, and the connecting protrusion 21 is embedded in the central hole of the rolling bearing 2 to form a communication path, so that the plane where the rotating arm 1 rotates and the main control arm 3 planes are parallel to each other, such a structure is easy to replace, the connection is firm and the air tightness is good; in order to maintain balance and increase aesthetics, the connecting protrusion 21 is arranged in the middle of the rotating arm 1, so that the rotating arm 1 can rotate around the connecting protrusion 21. The connecting groove 19 is provided at one end of the main control arm 3, so that the rotating arm 1 can be rotated at one end of the main control arm 3, and the other end of the main control arm 3 can be fixed on the window frame. Two pneumatic rotary automobile windshield wipers are symmetrically arranged on the frames on both sides of the window, or pneumatic rotary automobile windshield wipers are arranged on the top or lower frame of the window, as shown in Figs. 2 and 3. When in use, the main control arm 3 rotates to drive the rotating arm 1 to move from the non-working position 25 to the working position 24, and the rotating arm 1 rotates to remove rain and snow in the corresponding range. The main control arm 3 can also be used to drive the rotating rotating arm 1 Move to remove rain and snow in the corresponding range.

As shown in Figures 8-11, the rotating arm 1 is provided with an air outlet 12, water, air or a mixture of water and air can be sprayed from the air outlet 12 position, the setting of the air outlet 12 can include one, two or more The strip-shaped hole is, for example, a strip-shaped slit that penetrates the entire side of the rotating arm 1, or two strip-shaped slits from the center to the two ends, or an air outlet 12 composed of a plurality of strip-shaped holes arranged linearly Specifically, it can be one row or multiple rows, and the shape can be straight or curved. Different shapes of air outlets 12 can be selected according to the type of vehicle used; when the air outlets 12 are composed of multiple strip holes, The strip-shaped holes can also be point-shaped holes to make the water jet more uniform. Set the angle formed by the air outlet to the axis of the rotating arm (axis Z) and the axis (axis Y) where the connecting protrusion itself is located as ∠α, ∠α is 0-90° including 0° and not including 90 °, as shown in Figure 4 and Figure 5. After installation, the air outlet angle can be perpendicular to the car window or at a certain angle to the car window. As shown in Fig. 6 and Fig. 7, when the high-pressure gas is ejected from the air outlet 12, a wind knife is formed, and due to the included angle ∠α, the horizontal component of the high-pressure gas causes the rotating arm 1 to rotate at a high speed, thereby removing the windshield 23. Rain and snow foreign bodies on the ground.

In order to increase the scraping range of the wiper, the two ends of the rotating arm 1 are arranged in an inclined plane shape, and the inclined plane is provided with an inclined air outlet 22, corresponding to the direction of the car window, corresponding to the annular range on the outer sides of the two ends of the rotating arm 1, thereby increasing the effective use of the wiper. In scope, the inclined surface air outlet 22 may have the same shape as the air outlet 12, including one or more strip-shaped holes or dot-shaped holes.

The lateral air outlets 17 are provided on the side walls at both ends of the rotating arm 1, and the two lateral air outlets 17 are respectively arranged on both sides of the axis of the rotating arm 1. The lateral air outlets 17 can provide lateral thrust for the rotating arm 1 to make it rotate at a high speed. At this time, the air outlet direction of the horizontal air outlet 17 is not parallel to the axis direction of the rolling bearing 2. When ∠α is 0, it is necessary to set the lateral air outlet 17 to provide thrust during rotation of the rotating arm 1. When ∠α is not 0, according to ∠ For α size, it is also possible to consider not setting the horizontal air outlet 17 and only the thrust formed by the air outlet 12 to push the rotating arm 1 to rotate. Correspondingly, the horizontal air outlet 17 can also be provided to assist the rotating arm 1 to rotate at the same time.

The air supply system includes an air pump 7 and a heater 20. The air duct 6 connects the air pump 7, the heater 20, and the Y-type three-way connector 18 in sequence. The heater 20 is controlled by an external circuit and a switch for realizing Whether the air is heated or not; the water supply system includes a water storage tank 11 and a water pump 8. The water pipe 10 connects the water storage tank 11, the water pump 8 and the Y-type three-way connector 18 in sequence, and the water pump 8 and the Y-type three-way connector There is also a one-way valve 9 between 18.

It also includes an electromagnet 13 deceleration system, including an electromagnet 13 arranged on the side wall of the main control arm 3 and a magnetically permeable material 14 arranged on the rotating arm 1. The electromagnet 13 and the magnetically permeable material 14 correspond to each other and their positions are matched. , Can interact. Two magnetically permeable materials 14 are symmetrically arranged on the rotating arm 1 with respect to the connecting protrusion 21. The magnetically permeable material 14 is arranged as close to the outer end as possible, so that when the rotating arm 1 rotates, the two The magnetic material 14 can alternately correspond to the electromagnet 13. The electromagnet 13 is connected to the power supply controller 15. When the rotating arm 1 needs to be stopped, the switch can be turned off. At this time, the power supply controller 15 is activated to supply power to the electromagnet 13 to work, alternately Acting on the two magnetically permeable materials 14, so that the rotating arm 1 decelerates until it stops. The main control arm 3 is also provided with a position sensor 16 and a positioning motor 5. The position sensor 16 is used to sense the position of the rotating arm 1, and can be set at any reasonable position according to actual needs. The positioning motor 5 is used to control the main control arm 3. It is switched between the working position 24 and the non-working position 25. When the driver wants to stop the wiper, the switch can be turned off. At this time, the power supply controller 15 is activated to supply power to the electromagnet 13 and the position sensor 16 to make it work, and it is connected to the magnetically permeable position installed on the two ends of the rotating arm 1. The material 14 interacts to slow down the rotation speed of the rotating arm 1 and quickly stop it on a line parallel to the line where the main control arm 3 is located. At this time, the position sensor 16 on the main control arm 3 detects the position of the rotating arm 1 and sends an electrical signal to notify the positioning motor to work and return to the non-working position 25 of the wiper blade, as shown in Figure 2-3, stop working. At the same time, the power supply of the electromagnet 13 and the position sensor 16 is stopped. In the present invention, the air pump 7, the water pump 8, the air heater 20, the positioning motor 5, the electromagnet 13 and the position sensor 16 are all electrically connected to an external power supply through a control switch, which can ensure that the power supply is supported during work. The connection is an existing technology, so I won't repeat it.

The biggest feature of some embodiments of the present invention is to change the existing single arm or double arm swing, use a rubber scraper to remove rain and snow foreign objects, and become the main control arm 3 positioning, and the rotating arm 1 uses high-pressure airflow to remove rain and snow in a rotating manner. How foreign objects work. The high-pressure air is provided by the air pump 7, and reaches the rotating arm 1 through the transmission pipeline 4 of the main control arm 3, and then is sprayed out through the air outlet 12 on the rotating arm 1 to form an air knife. At the same time, the rotating arm 1 is driven to rotate to clear the rain. The purpose of snow foreign matter. Because the swivel arm 1 is driven by the high-pressure gas to rotate at a high speed without interruption to remove rain and snow foreign matter without interruption, the removal efficiency is high, so even in the case of heavy rainfall, it will provide the driver with a clear view, so This greatly eliminates the hidden dangers of driving safety, and greatly reduces the possibility of traffic jams. And because high-pressure air is used to remove rain and snow foreign objects on the windshield 23, the rotating arm 1 does not contact the windshield 23, so the windshield 23 will not be damaged, and there is no need to frequently replace the rubber blade, which reduces It saves maintenance costs and is environmentally friendly and clean.

Another feature of some embodiments of the present invention is that the pneumatic rotary car windshield wiper and the car water spray device are combined into one. The water is sucked from the water storage tank 11 by the water pump 8 through the water pipe 10, and the water pump 8 It is pumped out, passes through the one-way valve 9 through the water pipe 10, and then reaches the transmission pipeline 4 through the Y-shaped three-way connector 18. The water forms tiny water droplets under the impact of the high-speed flowing high-pressure gas in the transmission pipe 4, and is simultaneously ejected from the air outlet 12 of the rotating arm 1 with the high-pressure gas to form an air knife containing many small water droplets. The purpose of wetting and removing foreign matter on the windshield 23 greatly improves the working efficiency and effective wetting range of the water spray device, does not distract the driver, and saves water and environmental protection.

Pneumatic rotary car windshield wiper wipers use high-pressure air to remove rain and snow foreign matter on windshield 23, and at the same time provide rotating power for rotating arm 1, so pneumatic rotary car windshield wiper has no effect on the surface shape of windshield 23. For special requirements, foreign objects on the windshield 23 can be removed within the reach of the wind knife. Therefore, the installation position of the pneumatic rotary car windshield wiper can be placed in any reasonable position at will. This is more conducive to the obstacles in the design caused by the car wiper during the car design process, and thus more conducive to the overall design of the car, especially the fluid design and appearance design of the windshield 23 and the hood.

Example 1:

A pneumatic rotary windshield wiper for automobiles includes a rotating arm 1, a main control arm 3, a water supply system and an air supply system. The rotating arm 1 and the main control arm 3 are connected through a rolling bearing 2, and the rotating arm 1 and the main The control arms 3 pass through each other, and the other end of the main control arm 3 is connected to the water supply system and the gas supply system; the main control arm 3 is hollow to form a transmission pipe 4 or is provided with a tubular transmission pipe 4, and the water supply system and the gas supply system pass through the Y type The three-way connector 18 is connected to the transmission pipeline 4; the air supply system includes an air pump 7 and a heater 20, and the air duct 6 sequentially connects the air pump 7, the heater 20 and the Y-shaped three-way connector 18 in series; the water supply system The water storage tank 11 and the water pump 8 are included. The water pipe 10 connects the water storage tank 11, the water pump 8, the one-way valve 9 and the Y-shaped three-way connector 18 in series in sequence.

The side wall of the rotating arm 1 is provided with a connecting protrusion 21 protruding outward, and the side wall of the main control arm 3 is provided with a connecting groove 19 protruding. , The connecting groove 19 is arranged at one end of the main control arm 3, so that the rotating arm 1 can move circularly around the outer end of the main control arm 3 with the center as the center of the circle.

As shown in Figure 10, the rotating arm 1 is provided with an air outlet 12, the air outlet 12 is a strip hole with a width of 0.5 to 0.8 mm, specifically one that penetrates the entire side wall of the rotating arm 1, and the air outlet 12 is provided in the connection The opposite side of the protrusion 21, when in use, the direction of the wind is perpendicular to the glass surface, and the angle formed by the plane formed by the air outlet 12 to the axis of the rotating arm 1 and the axis of the connecting protrusion 21 itself is 0°. Angle; both ends of the rotating arm 1 are inclined, and each inclined surface is provided with a strip-shaped inclined air outlet 22, and the inclined air outlet 22 is connected to the air outlet 12; The angles formed by the air outlet 17 to the axis and the axis where the connecting protrusion 21 is located are respectively 90° and 270°, and two lateral air outlets 17 are respectively arranged on both sides of the axis of the rotating arm 1.

It also includes an electromagnet 13 deceleration system, including an electromagnet 13 arranged on the side wall of the main control arm 3 and a magnetically permeable material 14 arranged on the rotating arm 1. The magnetically permeable material 14 is arranged symmetrically with respect to the connecting protrusion 21. One, the position of the magnetically permeable material 14 and the electromagnet 13 are matched, and the electromagnet 13 is connected with a power supply controller 15; the main control arm 3 is also provided with a position sensor 16 and a positioning motor 5.

Example 2:

As shown in Figure 11, the rotating arm 1 is provided with an air outlet 12, the air outlet 12 is composed of a plurality of strip-shaped holes or dot-shaped holes arranged, according to the aperture size can be linearly arranged in one or more rows. The opening width or diameter is 0.5～0.8mm. The air outlet 12 is arranged on the opposite side of the connecting protrusion 21. When in use, the air outlet direction is perpendicular to the glass surface. The plane formed by the air outlet 12 to the axis of the rotating arm 1 and the connecting protrusion 21 The included angle formed by the axis where it is located, namely ∠α, is an included angle of 0°; both ends of the rotating arm 1 are inclined, and each inclined surface is provided with a strip-shaped inclined air outlet 22, and the inclined air outlet 22 is connected to the air outlet 12; The side walls at both ends of the arm 1 are provided with transverse air outlets 17, the angles between the transverse air outlet 17 and the axis of the connecting protrusion 21 are 90° and 270° respectively, and the two transverse air outlets 17 are respectively arranged at Rotating arm 1 on both sides of the axis.

Example 3:

The side wall of the rotating arm 1 is provided with a connecting protrusion 21 protruding outward, and the side wall of the main control arm 3 is provided with a connecting groove 19 protruding. In the middle, a connecting groove 19 is provided at one end of the main control arm 3.

Two strip-shaped air outlets 12 are provided on the rotating arm 1, which are respectively arranged on the side walls of the rotating arm 1 on both sides of the connecting protrusion 21. As shown in FIG. 8, the plane formed by the air outlet 12 to the axis of the rotating arm 1 is connected to The acute angle formed by the axis of the protrusion 21 is ∠α, which is 0°<∠α<90°; the two ends of the rotating arm 1 are inclined planes, and the inclined plane air outlet 22 is provided on the inclined plane. The strip hole is connected with the air outlet 12. The two air outlets 12 are arranged obliquely and have lateral thrust, which can provide thrust to promote the rotation of the rotating arm 1 during the air outlet process.

Example 4

The rotating arm 1 is provided with two groups of strip-shaped air outlets 12, and each group of air outlets 12 is composed of a plurality of strip-shaped holes or dot-shaped holes arranged in one or more rows according to the size of the aperture, which are respectively arranged in On the side walls of the rotating arm 1 on both sides of the connecting protrusion 21, as shown in Figure 9, the acute angle formed by the plane formed by the air outlet 12 to the axis of the rotating arm 1 and the axis of the connecting protrusion 21 itself is ∠α, which is 0°<∠α<90° included angle; both ends of the rotating arm 1 are inclined, and the inclined surface is provided with an inclined air outlet 22. The inclined air outlet 22 is composed of multiple dotted holes; in order to assist the rotation of the rotating arm 1, there are also Two horizontal air outlets 17, the angles between the horizontal air outlet 17 and the axis where the connecting protrusion 21 is located are 90° and 270° respectively, and the two horizontal air outlets 17 are respectively arranged on both sides of the axis of the rotating arm 1 .

The embodiments of the present invention have been described in detail above, but the content is only a preferred embodiment of the present invention and cannot be considered as limiting the scope of implementation of the present invention. All equal changes and improvements made in accordance with the scope of the application of the present invention should still fall within the scope of the patent of the present invention.

Claims

A pneumatic rotary windshield wiper for automobiles, which is characterized in that it comprises a rotating arm, a main control arm, a water supply system and an air supply system. The rotating arm and the main control arm are connected to each other, and the other end of the main control arm is connected to the water supply system and the air supply system.
The pneumatic rotary automobile windshield wiper according to claim 1, wherein the side wall of the rotating arm is provided with a connecting protrusion protruding outward, and the side wall of the main control arm is provided with a connecting groove. The connecting protrusion and the connecting groove are connected by a rolling bearing.
The pneumatic rotary automobile windshield wiper according to claim 2, wherein the rotating arm is provided with an air outlet, and the air outlet includes one, two or more strip holes, or more Punctate holes.
The pneumatic rotary automobile windshield wiper of claim 3, wherein the angle formed by the plane formed by the air outlet to the axis of the rotating arm and the axis of the connecting protrusion itself is set Is ∠α, ∠α is 0-90°, including 0° and not including 90°.
The pneumatic rotary automobile windshield wiper according to claim 4, characterized in that: both ends of the rotating arm are inclined, the inclined surface is provided with an inclined air outlet, and the inclined air outlet includes one or more strips. Shaped holes or one or more dotted holes.
The pneumatic rotary automobile windshield wiper according to claim 4, characterized in that: lateral air outlets are provided on the side walls at both ends of the rotating arm, and the two lateral air outlets are respectively arranged on the axis of the rotating arm On both sides.
The pneumatic rotary automobile windshield wiper according to any one of claims 1-6, wherein the main control arm is hollow to form a transmission pipeline or is provided with a tubular transmission pipeline, and the water supply The system and the gas supply system are connected to the transmission pipeline through a Y-shaped three-way connector.
The pneumatic rotary automobile windshield wiper according to claim 7, wherein the air supply system includes an air pump and a heater, and the air duct connects the air pump, the heater and the Y Type three-way connector serial connection;

The water supply system includes a water storage tank and a water pump, and a water pipe connects the water storage tank, the water pump, the one-way valve and the Y-shaped three-way connector in sequence.
The pneumatic rotary automobile windshield wiper according to claim 7, characterized in that it further comprises an electromagnet deceleration system, comprising an electromagnet arranged on the side wall of the main control arm and an electromagnet arranged on the rotating arm There are two magnetically permeable materials, the two magnetically permeable materials are symmetrically arranged with respect to the connecting protrusions, the positions of the magnetically permeable materials are matched with the electromagnet, and the electromagnet is connected with a power supply controller.
The pneumatic rotary automobile windshield wiper according to claim 7, wherein the main control arm is further provided with a position sensor and a positioning motor.