CN109823308B - Automobile windshield wiper driving system, automobile windshield wiper and automobile - Google Patents
Automobile windshield wiper driving system, automobile windshield wiper and automobile Download PDFInfo
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- CN109823308B CN109823308B CN201811646370.7A CN201811646370A CN109823308B CN 109823308 B CN109823308 B CN 109823308B CN 201811646370 A CN201811646370 A CN 201811646370A CN 109823308 B CN109823308 B CN 109823308B
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- wiper
- air
- piston
- pressure
- windshield wiper
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
- B60S1/00—Cleaning of vehicles
- B60S1/02—Cleaning windscreens, windows or optical devices
- B60S1/04—Wipers or the like, e.g. scrapers
- B60S1/06—Wipers or the like, e.g. scrapers characterised by the drive
- B60S1/10—Wipers or the like, e.g. scrapers characterised by the drive pneumatically driven
Abstract
The invention provides an automobile windshield wiper driving system, which comprises: the air compressor device comprises an air compressor and an air storage tank for the windshield wiper, the air storage tank for the windshield wiper can store unloading gas generated by the air compressor and provide pressure air for the driving device, and the pressure air pushes the driving device to move so as to drive the windshield wiper mechanism to move. The invention also provides an automobile applying the automobile windshield wiper driving system. According to the invention, the air compressor is adopted to replace the motor to drive the wiper mechanism, so that the power consumption and oil consumption of the whole vehicle are effectively reduced, the recycling of the waste gas of the air compressor is realized, and the energy-saving and emission-reducing advantages are achieved; the driving device designed by the invention can more conveniently control the movement of the wiper mechanism, effectively reduce the failure rate of the wiper mechanism when the wiper mechanism is used under the severe working conditions, and improve the working reliability of the wiper mechanism.
Description
Technical Field
The invention belongs to the field of automobile wipers, and particularly relates to an automobile wiper driving system, an automobile wiper and an automobile.
Background
This section provides background information related to the present disclosure only and is not necessarily prior art.
A wiper is a tool provided on a front glass of a motor vehicle for cleaning the front glass from rain and other contaminants so as to prevent the line of sight of passengers in the vehicle from being affected. At present, the automobile windshield wiper adopts motors such as a direct-current permanent magnet motor and the like as power sources, the power of the motors is derived from a power source generated by a generator, and the generator is driven by a fuel engine to generate power, so that the windshield wiper is driven by the motors, the power consumption of the whole automobile is inevitably increased, the oil consumption of the whole automobile is increased, on one hand, the loss of a storage battery is serious due to the increase of the power consumption of the whole automobile, the economic cost is directly increased due to the damage and frequent replacement of the storage battery, on the other hand, the oil consumption of the whole automobile is; in addition, because the wiper system in the prior art adopts the motor and the accessories thereof, when the vehicle is used under severe working conditions (such as severe weather conditions of wading, rain, snow, hail and the like), various faults are easy to generate, the service reliability of the wiper mechanism is poor, and even the driving safety can be endangered.
In addition, the air compressor in the vehicle brake system repeats the "load-unload-load" cycle all the time, and has no automatic control capability, and when the air compressor is inflated to a predetermined working pressure, the air compressor enters an unloading state, and the proportion of the working cycle mode of the "load-unload-load" to the whole working time generally reaches more than 50%, so that the air compressor is in a low-load state for half of the time, and the air compressor is also in a low-load state to continuously consume the energy of the internal combustion engine to operate, but the compressed air provided by the air compressor is not stored in the air storage cylinder, but is exhausted from the safety valve, thereby causing huge waste of resources and energy.
Disclosure of Invention
The invention provides an automobile windshield wiper driving system, an automobile windshield wiper and an automobile, aiming at least solving one of the problems in the prior art, and the aim is realized by the following technical scheme:
an automotive wiper drive system, comprising: the driving device is used for driving a windshield wiper mechanism of the automobile to move; the air compressor device comprises an air compressor and an air storage tank for a windshield wiper, wherein the air storage tank for the windshield wiper is used for storing unloading gas generated by the air compressor and providing pressure air serving as a power source for the driving device, and the pressure air can push the driving device to move so as to drive the windshield wiper mechanism to move.
Further, the driving device comprises a piston mechanism, the piston mechanism comprises a pressure cavity, a piston arranged in the pressure cavity and a piston push rod connected with the piston, the air storage tank for the wiper conveys the pressure air into the pressure cavity, the pressure air pushes the piston and the piston push rod to move, and the piston push rod can reciprocate between a first limit position and a second limit position.
Further, the drive device further includes a control mechanism including a controller, a control valve located between the wiper air tank and the pressure chamber, and a first position sensor provided at the first limit position, wherein the control valve is capable of controlling delivery of the pressure air from the wiper air tank to the pressure chamber, and when the first position sensor detects that the piston rod is moved to the first limit position, the controller controls opening of the control valve, the wiper air tank delivering the pressure air into the pressure chamber through the opened control valve.
Furthermore, a return spring capable of pushing the piston push rod to return is arranged in the driving device; the control mechanism further comprises a pressure release valve arranged between the air storage tank for the wiper and the pressure cavity, and a second position sensor arranged at the second limit position, wherein the pressure release valve is used for releasing gas in the pressure cavity, when the second position sensor detects that the piston push rod moves to the second limit position, the control unit controls the pressure release valve to be opened to release the gas in the pressure cavity, and meanwhile, the piston push rod returns towards the direction of the first limit position under the action of the return spring.
Further, the driving device comprises a rocker unit, one end of the rocker unit is rotatably connected with the piston push rod, and the other end of the rocker unit is connected with the wiper mechanism.
Furthermore, a rack structure is arranged on the piston push rod; the driving device further comprises a cam unit, the cam unit comprises a cam, a gear fixedly connected with the cam and a needle rod installed on the cam, the cam unit is in toothed connection with a rack structure of the piston push rod through the gear, the piston push rod drives the gear through the rack structure, the rotation of the gear drives the rotation of the cam, and the cam further drives the movement of the wiper mechanism through the needle rod.
Furthermore, the return spring is arranged in the piston mechanism, one end of the return spring is fixedly connected with the piston of the piston mechanism, and the other end of the return spring is in contact with the cavity of the pressure cavity.
Furthermore, the return spring is arranged in an independent cavity at the second limit position, and the other end of the piston push rod relative to the piston connecting end can move in the independent cavity and reach the second limit position
Further, the control mechanism further comprises a one-way valve arranged between the air storage tank for the windshield wiper and the air storage tank for the whole vehicle, and when the pressure in the air storage tank for the windshield wiper is lower than a preset value, the air storage tank for the whole vehicle inputs air into the air storage tank for the windshield wiper.
In addition, the invention also provides an automobile which is provided with the automobile windshield wiper and the automobile windshield wiper driving system.
Compared with the prior art, the technical scheme of the invention has the advantages that:
1. the air compressor replaces the motor to drive the automobile windshield wiper mechanism to move, so that the windshield wiper can continuously work, the electricity consumption and oil consumption of the whole automobile are effectively reduced, the service life of the storage battery is prolonged, resource saving and recycling are realized by recycling waste gas of the air compressor, and the air compressor has the remarkable effects of energy conservation and emission reduction.
2. According to the invention, the simple and efficient driving device of the rocker unit or the cam unit is adopted to replace a complex motor and components thereof in the prior art, so that the control on the movement of the wiper mechanism can be realized more conveniently and more reliably;
3. the invention also adopts a supplement mode that the gas storage tank for the whole vehicle supplies gas to the gas storage tank for the windshield wiper, the gas discharged by the air discharge unloading of the air compressor is stored in the gas storage tank for the windshield wiper, the windshield wiper mechanism is in the working condition of continuous operation for a long time, when the pressure of the gas storage tank for the windshield wiper is lower than the limit value, the gas storage tank for the whole vehicle supplies gas to the gas storage tank for the windshield wiper through the one-way valve to ensure the gas pressure in the gas storage tank for the windshield wiper, maintain the normal operation of the windshield wiper mechanism, and avoid the phenomenon that the windshield wiper; in addition, the wiper mechanism does not contain a motor and complex components thereof, so that the failure rate of the wiper mechanism is greatly reduced when the wiper mechanism is used under severe working conditions (such as severe weather conditions of wading, rain, snow, hail and the like), and the working reliability of the wiper mechanism is effectively improved.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
fig. 1 is a schematic view of an overall structure of a wiper driving apparatus for a vehicle according to the present invention;
fig. 2 is a schematic view of a driving and controlling structure of a wiper of an automobile according to an embodiment of the present invention.
Fig. 3 is a schematic view of a driving and controlling structure of a wiper of an automobile according to another embodiment of the present invention.
Detailed Description
In order to make the technical solutions of the present invention better understood by those skilled in the art, the present application will be described in detail with reference to the accompanying drawings and specific embodiments. It is to be noted, however, that the appended drawings illustrate only exemplary embodiments of this disclosure and are therefore to be understood that the disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
As shown in fig. 1, a wiper driving system for a vehicle includes: the driving device is used for driving a windshield wiper mechanism of the automobile to move; the air compressor device comprises an air compressor and an air storage tank for a windshield wiper, wherein the air storage tank for the windshield wiper is used for storing unloading gas generated by the air compressor and providing pressure air or compressed gas serving as a power source for the driving device, and the pressure air or the compressed gas can push the driving device to move so as to drive the windshield wiper mechanism to move, as shown by the white arrow direction in fig. 1. According to an embodiment of the present invention, as shown in fig. 2 and 3, the driving device includes a piston mechanism 10, the piston mechanism includes a pressure chamber 11, a piston 12 disposed in the pressure chamber 11, and a piston rod 13 connected to the piston, the wiper air tank supplies the pressure air into the pressure chamber 11, the pressure air pushes the piston 12 and the piston rod 13 to generate movement, and the piston rod 13 can reciprocate between a first limit position and a second limit position.
Further, as shown in fig. 2 and 3, according to an embodiment of the present invention, the driving apparatus includes a control mechanism 20, the control mechanism 20 includes a controller, a control valve between the wiper air tank and the pressure chamber 11, and a first position sensor 21 provided at the first limit position, the controller passing through the position sensor
Wherein the control valve is capable of controlling the delivery of the pressurized air from the wiper air reservoir through which the pressurized air is delivered into the pressure chamber 11 to the pressure chamber, and the controller controls the opening of the control valve when the first position sensor 21 detects that the piston push rod 13 is moved to the first extreme position.
In addition, according to an embodiment of the present invention, as shown in fig. 2 and 3, the driving device includes a return spring 30 capable of pushing the piston rod to return, the return spring 30 accumulates energy in the first half, and pushes the piston rod 13 to return by using the energy accumulated in the first half, so as to continuously push the wiper mechanism to reciprocate in the second half, the return spring 30 is present, so that the gas provided by the gas tank is not consumed in the second half, and only the energy stored in the return spring is consumed, and the two processes are alternately cycled, so as to realize the continuous oscillation of the wiper mechanism.
Furthermore, according to an embodiment of the present invention, as shown in fig. 2 and 3, the control mechanism 20 further includes a relief valve disposed between the air tank for wiper and the pressure chamber, and a second position sensor 22 disposed at the second limit position, wherein the relief valve is configured to release the pressure air in the pressure chamber 11, and when the second position sensor 22 detects that the piston rod 13 moves to the second limit position, the control unit controls the opening of the relief valve to release the pressure air in the pressure chamber 11, and at the same time, the piston rod 13 performs a return movement toward the first limit position under the action of the return spring 30.
According to one embodiment of the invention, the pressure gas provided by the air compressor drives the wiper mechanism through the rocker mechanism, the rocker mechanism swings to drive the wiper mechanism to move, and the unique quick return characteristic of the rocker mechanism and the pushing action of the return spring after the decompression valve is opened drive the wiper mechanism to continuously swing in a reciprocating manner. Specifically, as shown in fig. 2, the driving device includes a rocker unit 40, one end of the rocker unit 40 is rotatably connected to the piston rod 13, and the other end is connected to the wiper mechanism, wherein the rotation connection mode may be a rotation mode commonly used in the prior art, such as a rotation shaft connection mode.
According to an embodiment of the present invention, as shown in fig. 2, a return spring 30 is disposed in the pressure chamber 11, one end of the return spring 30 is fixedly connected to the piston 11, and the other end is in contact with the pressure chamber 11; when the piston push rod moves to the limit position, the controller receives a signal of the position sensor, the pressure release valve is opened, the gas pressure in the pressure cavity 11 is reduced, and the rocker unit 40 performs return movement under the action of the return spring to drive the wiper mechanism to reversely swing.
According to an embodiment of the present invention, as shown in fig. 3, the return spring 30 is disposed in a separate cavity at the second limit position, and the other end of the piston rod 13 relative to the piston connecting end can reciprocate in the separate cavity and reach the second limit position. The existence of return spring of second extreme position department for there is half time not to consume extra energy in whole process, moves as piston push rod 13 during the second extreme position, also compresses return spring 30 to the maximum compression volume simultaneously, and simultaneously, the valve that loses heart opens, makes return spring slowly release elasticity and the energy of gathering, promotes piston push rod 13 and moves towards opposite direction, also drives the gear rotation equally, and then drives coaxial camshaft rotation, makes the windshield wiper ability horizontal hunting. Therefore, in the latter half process, gas provided by the gas storage tank is not consumed, and only the elastic force and the energy stored by the spring are consumed, so that the circulation is alternated, the continuous swing of the wiper mechanism is realized, and the design improves the utilization efficiency of the energy.
As shown in fig. 2, the air supplied by the air compressor controls the movement of the wiper mechanism through the rocker unit 40, the left-right swing of the rocker unit 40 drives the movement of the wiper mechanism, and the wiper mechanism can continuously swing and return under the combined action of the quick return action of the rocker unit 40 and the return spring 30 after the relief valve is opened. Specifically, the specific working process in this driving mode is as follows: as shown in fig. 1 and 2, when the wiper switch is pressed, a signal is transmitted to the controller, the controller sends a signal to the control valve, the control valve is opened, as shown by the black arrows in fig. 2, pressure air is supplied into the pressure chamber 11, the piston rod 13 is pushed by the pressure air in the pressure chamber 11 to move towards the first limit position, the rocker unit 40 drives the wiper mechanism to swing to one side, when the first position sensor 21 detects that the piston push rod 13 reaches the first limit position, the first position sensor 21 sends a signal to the controller, the controller controls the opening of the pressure release valve after receiving the signal, the gas pressure in the pressure chamber 11 is reduced along with the opening of the pressure release valve, under the action of the return spring 30 and the action of the rocker unit 40, the piston rod 13 moves towards the second limit position to drive the rocker unit 40 and the wiper mechanism to swing towards the other side. When the second position sensor 22 detects that the piston push rod 13 reaches the set second limit position, the second position sensor 22 sends a signal to the controller, and the controller controls the control valve to open after receiving the signal, and supplies pressure gas to the pressure chamber 11, so that repeated circulation is performed, and the reciprocating swing of the wiper mechanism is realized. As shown in fig. 1 and 3 (dotted line portions), the controller and the control valve, the controller and the relief valve, and the wiper switch are connected by corresponding signal lines, the controller and the first position sensor 21 are connected by a position sensor signal line 1, and the controller and the second position sensor 22 are connected by a position sensor signal line 2.
According to an embodiment of the present invention, as shown in fig. 3, the piston rod 13 is provided with a rack structure 131, the driving device comprises a cam unit 50, the cam unit 50 comprises a cam 51, a gear 52 fixedly connected with the cam and a needle bar 53 arranged on the cam, the cam unit 50 is in gear joint with a rack structure 131 through the gear 52, wherein, the plunger rod 13 drives the gear 52 through the rack structure 131, the gear 52 rotates and drives the cam 51 to rotate, the rotation of the cam 51 drives the movement of the needle bar 53, the needle bar 53 further drives the movement of the wiper mechanism, thereby driving the wiper mechanism to move, and when the push rod reaches the second limit position, the control mechanism 20 controls the opening of the pressure relief valve, the piston push rod 13 is pushed to return towards the first limit position under the action of the return spring 30, and the reciprocating swing of the wiper mechanism is guaranteed. Specifically, as shown in fig. 3, the specific principle in this driving mode is: when the wiper switch is pressed down, a signal is transmitted to the controller, the controller sends a signal to the control valve, as shown in the direction of a white arrow in fig. 3, the control valve is opened and supplies pressure air to the pressure cavity 11, the pressure air pushes the piston push rod 13 to move towards the second limit position, the gear and gear wheel rotate to drive the cam to rotate, a needle rod on the cam is driven to move, and the movement of the needle rod drives the wiper mechanism to swing. When the piston push rod 13 reaches the first limit position, the first position sensor 21 sends a signal to the controller, the controller sends a signal to the pressure release valve to release air, at the moment, the gas pressure in the pressure cavity 11 is reduced, the piston push rod 13 is pushed to move towards the first limit position under the action of the return spring 30, the rack structure 131 drives the gear 51 to rotate, the cam 51 also rotates to drive the needle rod 53 to move, and the needle rod 53 further drives the wiper mechanism to move. When the first position sensor 21 detects that the piston push rod 13 reaches the first limit position, the first position sensor 21 sends a signal to the controller, the controller sends an instruction after receiving the signal to control the opening of the control valve, the gas is filled into the pressure cavity 11, and the piston push rod 13 is continuously pushed to move towards the second limit position, so that the repeated circulation is realized, and the continuous swing of the wiper mechanism is realized.
According to an embodiment of the present invention, as shown in fig. 1-2, the control mechanism further includes a check valve 23 disposed between the air tank for wiper and the air tank for vehicle, when the pressure in the air tank for wiper is lower than a predetermined value, the control mechanism 20 controls the opening of the check valve 23, and the air tank for vehicle inputs air into the air tank for wiper to meet the air demand of the wiper mechanism.
In addition, according to one embodiment of the invention, the invention further provides an automobile which is provided with the automobile windshield wiper and the automobile windshield wiper driving system.
The technical scheme of the invention has the following remarkable technical effects: the air compressor is adopted to replace the motor to drive the automobile windshield wiper mechanism to move, so that the windshield wiper can continuously work, the electricity consumption and oil consumption of the whole automobile can be effectively reduced, the waste gas of the air compressor can be recycled under the conventional working condition, the aims of saving resources and recycling are fulfilled, and the effects of energy conservation and emission reduction are achieved; according to the invention, the rocker unit or the cam unit is adopted to replace a complex motor-crank-connecting rod mechanism in the prior art, so that the swing and angle control of the windshield wiper can be realized more conveniently; according to the invention, the unloading gas of the air compressor is stored in the gas storage tank for the windshield wiper by adopting a supplementing mode that the gas storage tank for the whole vehicle supplies gas to the gas storage tank for the windshield wiper, and when the pressure of the gas storage tank for the windshield wiper is lower than the limit value under the working condition that the windshield wiper mechanism continuously works for a long time, the gas storage tank for the whole vehicle supplies gas to the gas storage tank for the windshield wiper through the one-way valve to ensure the gas pressure in the gas storage tank for the windshield wiper, so that the normal work of the windshield wiper mechanism is maintained, and the phenomenon that the windshield wiper cannot; in addition, the wiper mechanism does not adopt a motor and complex components thereof, and the failure rate of the vehicle in use under severe working conditions (such as weather conditions of wading, rain, snow, hail and the like) is greatly reduced, so that the working reliability of the wiper mechanism and the whole vehicle is effectively improved.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any modifications, equivalents and improvements that can be easily conceived by those skilled in the art within the technical scope of the present invention are intended to be included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (7)
1. An automotive wiper drive system, comprising:
the driving device is used for driving a windshield wiper mechanism of the automobile to move;
the air compressor device comprises an air compressor and an air storage tank for a windshield wiper, wherein the air storage tank for the windshield wiper is used for storing unloading gas generated by the air compressor and providing pressure air serving as a power source for the driving device, and the pressure air can push the driving device to move so as to drive the windshield wiper mechanism to move;
the driving device comprises a piston mechanism, the piston mechanism comprises a pressure cavity, a piston arranged in the pressure cavity and a piston push rod connected with the piston, the air storage tank for the wiper conveys the pressure air into the pressure cavity, the pressure air pushes the piston and the piston push rod to move, and the piston push rod can reciprocate between a first limit position and a second limit position;
the drive device further comprises a control mechanism comprising a controller, a control valve between the wiper air reservoir and the pressure chamber, and a first position sensor provided at the first limit position, wherein the control valve is capable of controlling the delivery of the pressurized air from the wiper air reservoir to the pressure chamber, and when the first position sensor detects that the piston push rod is moved to the first limit position, the controller controls the control valve to open, the wiper air reservoir delivers the pressurized air into the pressure chamber through the open control valve;
a return spring capable of pushing the piston push rod to return is arranged in the driving device;
the control mechanism further comprises a pressure release valve and a second position sensor, the pressure release valve is arranged between the air storage tank for the wiper and the pressure cavity, the second position sensor is arranged at the second limit position, the pressure release valve is used for releasing gas in the pressure cavity, when the second position sensor detects that the piston push rod moves to the second limit position, the controller controls the pressure release valve to be opened, the gas in the pressure cavity is released, and meanwhile, the piston push rod returns towards the direction of the first limit position under the action of the return spring.
2. The vehicle wiper drive system as defined in claim 1 wherein said drive means includes a rocker unit, one end of said rocker unit being rotatably connected to said piston pusher and the other end being connected to said wiper mechanism.
3. The automotive wiper drive system according to claim 1, wherein the plunger rod is provided with a rack structure;
the driving device further comprises a cam unit, the cam unit comprises a cam, a gear fixedly connected with the cam and a needle rod installed on the cam, the cam unit is in toothed connection with a rack structure of the piston push rod through the gear, the piston push rod drives the gear through the rack structure, the rotation of the gear drives the rotation of the cam, and the cam further drives the movement of the wiper mechanism through the needle rod.
4. The vehicle wiper drive system according to claim 2, wherein the return spring is disposed in the piston mechanism, and one end of the return spring is fixedly connected to a piston of the piston mechanism, and the other end thereof is in contact with an inner wall surface of the pressure chamber.
5. The vehicle wiper drive system according to claim 3, wherein the return spring is disposed in a separate chamber located at the second limit position, the other end of the plunger rod relative to the plunger connecting end being movable in the separate chamber and reaching the second limit position.
6. The wiper drive system according to claim 4, wherein the control mechanism further includes a check valve for controlling on/off of a line between the wiper air tank and the vehicle air tank, the check valve being opened when a pressure in the wiper air tank is lower than a predetermined value, the vehicle air tank feeding air to the wiper air tank.
7. A motor vehicle, characterized by a motor vehicle wiper and a motor vehicle wiper drive system according to any one of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811646370.7A CN109823308B (en) | 2018-12-29 | 2018-12-29 | Automobile windshield wiper driving system, automobile windshield wiper and automobile |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811646370.7A CN109823308B (en) | 2018-12-29 | 2018-12-29 | Automobile windshield wiper driving system, automobile windshield wiper and automobile |
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| Publication Number | Publication Date |
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| CN109823308A CN109823308A (en) | 2019-05-31 |
| CN109823308B true CN109823308B (en) | 2021-01-19 |
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| CN201811646370.7A Active CN109823308B (en) | 2018-12-29 | 2018-12-29 | Automobile windshield wiper driving system, automobile windshield wiper and automobile |
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| CN111409594A (en) * | 2020-03-31 | 2020-07-14 | 潍柴动力股份有限公司 | Washing system, control method thereof, storage medium, processor and mobile carrier |
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| GB664575A (en) * | 1948-11-04 | 1952-01-09 | Trico Products Corp | Improvements in or relating to windscreen wipers |
| CN201580361U (en) * | 2009-09-28 | 2010-09-15 | 三一重型装备有限公司 | Device for controlling swinging of vehicle windshield wiper |
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| CN109823308A (en) | 2019-05-31 |
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