Pop-up windscreen wiper device capable of reducing wind noise and working method of pop-up windscreen wiper device

Abstract

The invention discloses a pop-up windscreen wiper device capable of reducing wind noise and a working method thereof.The pop-up windscreen wiper device comprises a windscreen wiper driving motor fixed to a front wall gutter channel metal plate, the driving end of the windscreen wiper driving motor is connected with a windscreen wiper, the pop-up windscreen wiper device further comprises a cover plate box fixed to the lower portion of a hood cover, and the rear portion of the cover plate box is located above the windscreen wiper driving motor; a sealing piece used for filling a gap between the front wall gutter channel metal plate and the bottom of the cover plate box and preventing rainwater from entering the front cabin is fixed between the front portion of the front wall gutter channel metal plate and the bottom of the cover plate box, and a cover plate capable of extending out of the cover plate box, filling a gap between the bottom of the front windshield and the hood cover or retracting into the cover plate box is arranged in the cover plate box. The windscreen wiper can be recycled into a space defined by the front wall gutter channel metal plate, the cover plate box, the cover plate and the front windshield. When the windscreen wiper works, the cover plate retracts into the cover plate box, and an unobstructed moving space is provided for the windscreen wiper. When the windscreen wiper does not work, the cover plate extends out to fill a gap between the bottom of the front windshield glass and the hood cover, and wind noise is remarkably reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle body parts, and in particular to a pop-up wiper device for reducing wind noise and a working method thereof. Background Art

[0002] Safety is always the top priority when driving a car. As a water removal device for the front windshield, the wiper can promptly and effectively remove water droplets from the glass surface, allowing the driver to maintain a clear field of vision even on rainy days. However, as a protruding part of the car, the wiper will generate high-frequency wind noise like the rearview mirror, which will reduce the clarity of the language in the car and affect the driving comfort.

[0003] At present, high-end vehicles on the market will use two methods to reduce the impact of wipers. One is to use boneless wipers, and the other is to hide the wipers under the hood. Boneless wipers: As the name suggests, there is no metal wiper frame, only wiper rubber strips. This type of wiper is light and easy to disassemble and wash, and it also reduces the volume of the car's external protrusions to a certain extent. Hidden wipers: Option 1 is to tilt the rear edge of the hood up to block the wipers from a horizontal perspective, so that the wipers will not affect the flow field when the car is driving, thereby reducing wind noise; Option 2 is to add a movable cover to the traditional wiper installation point, that is, on the front sheet metal of the car, and through the movement of the cover, the function of shielding the wiper body can be achieved.

[0004] However, boneless wipers are still exposed wipers after all, which can reduce wind noise to a certain extent, but cannot fundamentally solve the wind noise problem of wipers. In the first solution of hidden wipers, the rear edge of the hood cover is tilted up, which will block the driver's front view and affect the man-machine. In the second solution, only a cover plate for shielding the wiper is added to the wiper mounting plate. The cover plate rotates around the axis to realize the opening and closing functions. When the cover plate is open, the wiper can work normally, and when the cover plate is closed, the wind noise can be reduced. Because the cover plate does not smooth the gap between the bottom of the front windshield and the hood cover. Only a cover plate covering the wiper is added at the position where the wiper is installed. When the wiper is used, the cover plate is opened, and when the wiper is not used, the cover plate is closed. The gap between the bottom of the front windshield and the hood cover still exists. Under high-speed conditions, there will still be turbulence here, resulting in reduced wind noise performance. Summary of the invention

[0005] The purpose of the present invention is to solve the deficiencies of the above-mentioned background technology and to provide a pop-up wiper device and a working method thereof which can reduce wind noise in rainless weather, wipe water in rainy weather, and prevent fallen leaves from falling into the cabin when the vehicle is parked.

[0006] To achieve this object, the pop-up wiper device for reducing wind noise designed in the present invention includes a wiper drive motor fixed on a front gutter sheet metal, a drive end of the wiper drive motor being connected to a wiper, and also includes a cover box fixed under a hood cover, the rear portion of the cover box being located above the wiper drive motor, a seal for filling a gap between the front gutter sheet metal and the bottom of the cover box and preventing rainwater from entering the interior of the front cabin is fixed between the front portion of the front gutter sheet metal and the bottom of the cover box, a cover plate is provided in the cover box, which can extend out of the cover box, fill the gap between the bottom of the front windshield and the hood cover, or retract into the cover box, and when the cover plate is extended, the wiper can be recovered into the space enclosed by the front gutter sheet metal, the cover box, the cover plate and the front windshield.

[0007] The wiper uses the wiper drive motor fixed on the front wall water channel sheet metal as the power source, and the motor drive end is connected to the wiper, which is the basic structure to realize the normal swing of the wiper to clean the windshield. The cover box under the hood is an important part of the device. Its rear part is located above the wiper drive motor and cooperates with the front wall water channel sheet metal. The gap between the two is filled by the seal to effectively prevent rainwater from entering the front cabin. This plays a good protective role for the parts in the cabin and avoids rust, short circuit and other problems caused by rain erosion. The cover plate set in the cover box can be extended or retracted. When extended, it can fill the gap between the bottom of the front windshield and the hood cover; when the cover plate is extended and the wiper is retracted, the wiper can be located in the space surrounded by the front wall water channel sheet metal, the cover box, the cover plate and the front windshield. Under normal working conditions, the wiper swings under the drive of the wiper drive motor to clean the windshield. When the wipers are not needed or in special circumstances (such as parking), the cover extends and the wipers can be retracted into a specific space. At the same time, the cover fills the gap, changing the situation where the traditional wipers are exposed. When the vehicle is driving, the gap between the bottom of the front windshield and the hood will disturb the airflow, generate turbulence and cause wind noise. After filling this gap, the extendable cover allows the airflow to flow more smoothly through the front of the vehicle, reducing the noise caused by the turbulent airflow. According to aerodynamic research, a smooth airflow surface can significantly reduce the generation of wind noise. This design is equivalent to creating a smoother transition area for the airflow in front of the vehicle. Traditional wipers are still exposed to the airflow when not in use. Their own structure and position will interfere with the airflow and become one of the sources of wind noise. The cover of the pop-up wiper device covers the top when the wipers are retracted, effectively avoiding the interference of the wipers on the airflow, further reducing the wind noise level, improving the quietness of the car, and providing a more comfortable riding environment for drivers and passengers, especially when driving at high speeds. The wind noise reduction effect is more obvious. When the wipers are retracted into the enclosed space, the cover can prevent dust, bird droppings, leaves and other debris from falling directly on the wipers. If these debris are attached to the wipers for a long time, the wiper rubber strips will be worn when the wipers are used next time, reducing the cleaning effect and service life of the wipers. At the same time, when parking in bad weather (such as heavy rain, heavy snow, etc.), the cover can also protect the wipers from the accumulation of ice and snow, and prevent the wipers from being frozen or deformed due to the weight of ice and snow. During the driving process of the vehicle, various chemicals on the road (such as snow melting agents, oil stains, etc.) may splash onto the wipers with rain. With the protection of the cover, the chances of these chemicals contacting the wipers are greatly reduced, thereby reducing the possibility of corrosion of the wiper rubber strips, ensuring that the wipers are in good working condition for a long time, reducing the frequency of wiper replacement, and saving the owner's use costs. When the cover is extended, the pop-up wiper device makes the front of the vehicle look neater and smoother.Compared with the traditional abrupt wiper design, this hidden design is more integrated with the overall appearance of the vehicle, especially for some vehicles with fashionable appearance design concepts, the device can enhance the grade of the vehicle and give people a more refined visual feeling, which is in line with the pursuit of vehicle aesthetics by modern consumers. The cover fills the gap between the front windshield and the hood cover, eliminating this detail defect that may affect the overall appearance of the vehicle, making the front lines of the vehicle more coherent and enhancing the overall visual effect of the vehicle.

[0008] Furthermore, the cover box is fixed within the bottom surface coverage of the hood cover.

[0009] The cover box does not exceed the coverage area of ​​the hood cover, and the air flow can flow through this area more smoothly during the driving process of the vehicle. Because there is no sudden change in air flow caused by protrusions or depressions, the generation of air turbulence can be reduced, which helps to reduce wind resistance. Lower wind resistance can not only improve the vehicle's fuel economy (for fuel vehicles) or endurance (for new energy vehicles), but also reduce the noise caused by wind resistance, that is, further reduce wind noise and make the interior environment quieter.

[0010] Furthermore, the seal is fixed to the front dash gutter sheet metal along the width direction of the vehicle body, and the bottom of the cover box is provided with a protruding structure arranged along the width direction of the vehicle body and in close contact with the seal.

[0011] The raised structure is in close contact with the seal, which can greatly reduce the tiny gap that may exist between the two compared to ordinary flat fitting. During the driving process of the vehicle, even if it is affected by external factors such as vibration and airflow impact, this close contact relationship can better maintain the sealing state, effectively preventing rainwater, dust, etc. from entering from the gap between the bottom of the cover box and the front dash panel sheet metal, further improving the waterproof and dustproof sealing performance. The seals and raised structures are arranged along the width of the vehicle body, realizing all-round sealing cooperation in the lateral dimension of the vehicle body. This coordinated arrangement ensures that no matter which position within the entire width of the vehicle body, good sealing protection can be obtained, avoiding the occurrence of leakage such as rainwater due to poor local sealing, and comprehensively improving the protection of the interior of the front cabin. While the raised structure is in close contact with the seal, it also plays a supporting role for the bottom of the cover box to a certain extent. When the cover box is installed under the hood, this support helps to maintain the position stability of the cover box in the width direction of the vehicle body and prevents it from being laterally offset due to external forces (such as bumps during vehicle driving, airflow forces, etc.), thereby ensuring the normal operation of the entire cover box and related components (such as internal covers, etc.). Since the raised structure and the seal are tightly matched along the width direction of the vehicle body, the connection between the two is more stable. During long-term use, even if the seal may undergo some changes due to aging, wear and tear, the raised structure can still maintain the original sealing and matching state as much as possible through close contact, extending the service life of the entire sealing structure and reducing problems such as increased maintenance costs due to failure of the sealing structure. The seal can be a rubber sealing strip, a silicone sealing pad, a foam sealing material, a PVC sealing strip, etc.

[0012] Furthermore, a rear portion of the cover plate is provided with an inclined surface that fits with the front windshield, and a buffer is provided on the inclined surface.

[0013] The purpose of the inclined surface that fits the front windshield and is provided at the rear of the cover plate is to better match the shape of the bottom of the front windshield. Since the bottom of the front windshield is usually not a completely vertical plane, but has a certain inclination, the inclined surface can make the cover plate fit tightly and smoothly to the bottom of the windshield when it is extended, reducing the gap between the two, so as to play a more effective role in waterproofing, wind noise prevention, etc. A buffer is provided on the inclined surface, which can play a buffering role when the cover plate fits the front windshield. It can be made of various elastic materials, such as rubber, sponge, etc. The existence of the buffer can prevent the cover plate from scratching, collision and other damages caused by rigid contact between the cover plate and the windshield during the contact with the front windshield, whether in the case of vibration during the driving of the vehicle or when the cover plate is extended or retracted, thereby protecting the surface integrity of the front windshield and the cover plate itself. The design of the inclined surface enables the cover plate to fit more closely with the front windshield, reducing the channels where rainwater may leak. When rain flows down the front windshield, it is difficult for rain to enter the internal area through the gap between the cover and the glass because the cover and the glass fit closely together at the bottom through the inclined surface, which effectively improves the waterproof performance and prevents rain from entering the space where the wipers and other components are located, thereby protecting these components from rain erosion. The buffer also helps waterproofing to a certain extent. Because it fills the tiny gap that may exist between the inclined surface and the glass, it can maintain this relatively tight fit even in the case of vehicle vibration, further reducing the possibility of rain leakage and enhancing the overall waterproof effect. The inclined surface makes the cover fit closely with the front windshield. During the driving process of the vehicle, the airflow can flow smoothly when passing through this place, reducing the airflow disturbance caused by the existence of the gap. When the airflow passes smoothly, the wind noise caused by the irregular flow of the airflow can be reduced, making the interior environment quieter. The buffer can ensure that the cover and the front windshield are still in a stable fit under various vibration conditions during the driving of the vehicle. Without buffers, vibrations may cause momentary gaps or looseness between the cover and the glass, causing irregular disturbances in the airflow and generating wind noise.

[0014] Furthermore, a cover plate guiding mechanism and a cover plate driving mechanism are provided in the cover plate box; the cover plate can be moved toward the front windshield along the guiding direction or retracted into the cover plate box away from the front windshield by the action of the cover plate guiding mechanism; the cover plate driving mechanism can drive the cover plate to move along the guiding direction.

[0015] The cover plate guide mechanism is arranged in the cover plate box, and its main function is to provide accurate guidance for the movement of the cover plate. It limits the movement path of the cover plate, so that the cover plate can only move along a specific guide direction, ensuring that the cover plate moves accurately and stably when extending toward the front windshield or retracting into the cover plate box, and will not deviate from the expected path, thereby ensuring the normal operation of the entire pop-up wiper device. The cover plate drive mechanism is also located in the cover plate box and is a key component that gives the cover plate movement power. It can drive the cover plate to move along the guide direction determined by the cover plate guide mechanism. Whether it is pushing the cover plate out to move it toward the front windshield to fill the gap and perform related functions, or pulling the cover plate back to move it away from the front windshield and retract it into the cover plate box, it depends on the power support provided by the cover plate drive mechanism. The cover plate guide mechanism ensures the accuracy of the cover plate movement. In a complex and frequently vibrating environment such as a vehicle, an accurate movement path is crucial for the function of the cover plate. For example, when the cover plate needs to be extended to accurately fill the gap between the front windshield and the hood cover, the guide mechanism can ensure that the cover plate reaches the specified position accurately, achieves a good gap filling effect, and effectively reduces wind noise, waterproof and other functions to be better played. Without precise guidance, the cover plate may not be able to accurately reach the gap position, resulting in functional failure. The cover plate drive mechanism and the guide mechanism cooperate with each other to achieve the continuity of the cover plate movement. The power provided by the drive mechanism can enable the cover plate to move continuously and smoothly in the direction determined by the guide mechanism. For example, in the process of extending and retracting the cover plate, the drive mechanism continuously applies appropriate power, combined with the guiding effect of the guide mechanism, so that the movement of the cover plate is smooth, and there will be no jamming or sudden stop, which is very important for improving the reliability of the device and user experience. Through the synergy of the cover plate guide mechanism and the drive mechanism, the cover plate can be extended and retracted accurately and timely. When the cover plate is extended, it can fill the gap between the front windshield and the hood cover, effectively preventing rainwater from entering the internal area from the gap, and at the same time reduce the disturbance of the airflow at the gap, thereby reducing wind noise. When the cover needs to be retracted, the drive mechanism can quickly pull it back into the cover box so that the wiper can perform normal swing cleaning and other operations, ensuring the versatility of the entire wiper device. Accurate and stable movement helps to extend the service life of the device. Since the movement of the cover is carried out under the accurate guidance of the guide mechanism and the reasonable drive of the drive mechanism, the damage to the cover itself and other parts (such as the front windshield, cover box, etc.) caused by improper movement of the cover (such as collision, excessive friction, etc.) is reduced. For example, if the movement of the cover is not properly guided, it may frequently collide with other parts, causing wear and deformation of the cover or other parts. Now, through reasonable mechanism settings, these problems can be avoided, thereby extending the service life of the entire pop-up wiper device.

[0016] Furthermore, the cover plate guiding mechanism and the cover plate driving mechanism are both fixed to the top of the cover plate box.

[0017] This layout makes the two key mechanisms in a relatively high position in the cover box. When the cover moves under its action, it obtains guidance and power support from the top area of ​​the cover box, thereby realizing movement in a specific direction, such as extending toward the front windshield or retracting into the cover box. Fixing these two mechanisms at the top can effectively utilize the space at the top of the cover box and avoid spatial conflicts with other components that may be located at the bottom or middle of the cover box (such as some possible line connections, other auxiliary structures, etc.). In this way, the space inside the cover box can be more reasonably planned and utilized, so that each component can better play its own function in a relatively independent and mutually cooperative space environment. During the installation process, the operator can more conveniently install the two mechanisms from the top of the cover box without going too deep into the complex space inside the cover box. Moreover, during subsequent maintenance, it is also easier to approach the two mechanisms from the top to inspect, repair or replace parts, reducing the difficulty and workload of maintenance. The two mechanisms are fixed on the top of the cover box, which is relatively far from possible water inlets (such as the path where rainwater may flow in from the windshield, etc.) and dust inlets. When the vehicle is driving, rainwater and dust are usually more likely to invade the device from the bottom or side, while the top position is relatively safe. This can reduce the risk of rainwater and dust entering these two key mechanisms, reduce the possibility of mechanism failure due to water and dust ingress, and thus improve the reliability of the two mechanisms and the stability of the entire device.

[0018] Furthermore, the cover plate guiding mechanism comprises a guide rail fixed on the inner wall of the cover plate box and a slider arranged on the guide rail, and the cover plate is fixed on the slider.

[0019] Furthermore, the cover plate driving mechanism includes a cover plate driving motor, and a driving end of the cover plate driving motor is connected to the slider via a transmission mechanism so that the slider moves linearly along the guide rail.

[0020] Furthermore, the transmission mechanism includes a gear rack mechanism, a screw nut mechanism and a worm gear mechanism.

[0021] The guide rail provides a precise guide path for the cover plate, and its stable position fixed on the inner wall of the cover plate box ensures the accuracy of the movement path of the slider and the cover plate. The low-friction sliding of the slider on the guide rail is strictly carried out according to the shape and direction of the guide rail, so that the cover plate fixed on the slider can accurately reach the specified position such as the gap between the front windshield and the hood cover, effectively realizing the functions of reducing wind noise and waterproofing. Only when the cover plate accurately fills the gap can these functions be maximized. The cover plate drive motor transmits power to the slider through the transmission mechanism, so that the slider can continuously and smoothly move in a straight line along the guide rail. The characteristics of different transmission mechanisms help to achieve this goal. For example, the efficient transmission of the gear rack mechanism can ensure the timeliness and accuracy of power transmission; the self-locking function of the screw nut mechanism can ensure the accurate stop and start of the cover plate at a specific position; the large transmission ratio and self-locking ability of the worm gear mechanism can also make the cover plate movement more controllable, thereby realizing the continuity of the cover plate movement and ensuring the normal operation of the entire device. The low-friction sliding of the slider on the guide rail and the reasonable matching of the various components in the transmission mechanism can help reduce the friction between the components. For example, the good meshing of the gear and the rack in the gear rack mechanism, the relative movement of the screw and the nut in the screw nut mechanism, and the cooperation of the worm wheel and the worm in the worm gear mechanism can all reduce the friction coefficient, thereby extending the service life of the guide rail, the slider, the cover plate, the various components of the transmission mechanism, and the cover plate drive motor. Since the movement of the cover plate is achieved by the orderly movement of the slider on the guide rail and the reasonable drive of the drive mechanism, this avoids the direct collision of the cover plate with the inner wall or other components of the cover plate box during movement. During the installation process, the guide rail is fixed on the inner wall of the cover plate box, and its position is clear, which is convenient for the installer to place the slider on the guide rail and fix the cover plate on the slider, thereby improving the installation efficiency. At the same time, the connection methods of different transmission mechanisms are also relatively clear. For example, the installation of the gear and the rack in the gear rack mechanism, the installation of the screw and the nut in the screw nut mechanism, and the installation of the worm wheel and the worm in the worm gear mechanism all have relatively standard installation processes, which are convenient for the installer to operate. In the subsequent maintenance process, if problems are found in the guide rails, sliders, cover plates, transmission mechanism components or cover plate drive motors, this structure facilitates maintenance. For example, if the slider is not sliding smoothly, it can be relatively easy to remove the slider from the guide rail for inspection and maintenance; if a component in the transmission mechanism fails, it can be repaired according to the specific transmission mechanism type without large-scale disassembly of the entire device, reducing the difficulty and workload of maintenance.

[0022] Furthermore, the working method of the pop-up wiper device for reducing wind noise includes: when the wiper is needed to work, the cover is retracted into the cover box, and the wiper drive motor drives the wiper to scrape off the droplets on the front windshield; when the wiper is not needed to work, the wiper drive motor drives the wiper to move, the wiper returns to a horizontal state, and the cover extends out of the cover box to fill the gap between the bottom of the front windshield and the hood cover.

[0023] When the wiper is working, the cover is first retracted into the cover box, providing an unobstructed space for the wiper to move. The wiper can swing freely on the entire surface of the front windshield, ensuring the effect and efficiency of scraping off liquid droplets. When the wiper is not working, the cover extends to fill the gap between the bottom of the front windshield and the hood cover, which can significantly reduce wind noise. When it rains but the wiper is not working, rainwater may flow down the front windshield. If the gap is not filled, rainwater is likely to enter the area where the wiper and other components are located through the gap, which may damage these components. Filling the gap with the cover can effectively prevent rainwater from entering from this path, and can also prevent dust and other impurities from entering the relevant area, protecting the wiper and other related components and extending their service life. When the wiper is not working, the wiper is restored to a horizontal state and the cover extends to fill the gap, which is not only conducive to the storage of the wiper, so that it is in a relatively regular and easy-to-protect position, but also prevents the wiper from being affected by external factors (such as wind and sand, collision, etc.) due to improper storage during vehicle driving. At the same time, this method can also reduce the aging, deformation and other problems of the wipers caused by long-term exposure to the outside, further extending the service life of the wipers.

[0024] The beneficial effects of the present invention are as follows: the wiper uses the wiper drive motor fixed on the front wall water trough sheet metal as the power source, and the motor drive end is connected to the wiper, which is the basic structure for realizing the normal swing of the wiper to clean the windshield. The cover box under the hood cover is an important part of the device. Its rear part is located above the wiper drive motor and cooperates with the front wall water trough sheet metal. The gap between the two is filled by the seal to effectively prevent rainwater from entering the front cabin. This plays a good protective role for the parts in the cabin and avoids rust, short circuit and other problems caused by rainwater erosion. The cover plate set in the cover box can be extended or retracted. When extended, it can fill the gap between the bottom of the front windshield and the hood cover; when the cover plate is extended and the wiper is retracted, the wiper can be located in the space surrounded by the front wall water trough sheet metal, the cover box, the cover plate and the front windshield. Under normal working conditions, the wiper swings under the drive of the wiper drive motor to clean the windshield. When the wipers are not needed or in special circumstances (such as parking), the cover extends and the wipers can be retracted into a specific space. At the same time, the cover fills the gap, changing the situation where the traditional wipers are exposed. When the vehicle is driving, the gap between the bottom of the front windshield and the hood will disturb the airflow, generate turbulence and cause wind noise. After filling this gap, the extendable cover allows the airflow to flow more smoothly through the front of the vehicle, reducing the noise caused by the turbulent airflow. According to aerodynamic research, a smooth airflow surface can significantly reduce the generation of wind noise. This design is equivalent to creating a smoother transition area for the airflow in front of the vehicle. Traditional wipers are still exposed to the airflow when not in use. Their own structure and position will interfere with the airflow and become one of the sources of wind noise. The cover of the pop-up wiper device covers the top when the wipers are retracted, effectively avoiding the interference of the wipers on the airflow, further reducing the wind noise level, improving the quietness of the car, and providing a more comfortable riding environment for drivers and passengers, especially when driving at high speeds. The wind noise reduction effect is more obvious. When the wipers are retracted into the enclosed space, the cover can prevent dust, bird droppings, leaves and other debris from falling directly on the wipers. If these debris are attached to the wipers for a long time, the wiper rubber strips will be worn when the wipers are used next time, reducing the cleaning effect and service life of the wipers. At the same time, when parking in bad weather (such as heavy rain, heavy snow, etc.), the cover can also protect the wipers from the accumulation of ice and snow, and prevent the wipers from being frozen or deformed due to the weight of ice and snow. During the driving process of the vehicle, various chemicals on the road (such as snow melting agents, oil stains, etc.) may splash onto the wipers with rain. With the protection of the cover, the chances of these chemicals contacting the wipers are greatly reduced, thereby reducing the possibility of corrosion of the wiper rubber strips, ensuring that the wipers are in good working condition for a long time, reducing the frequency of wiper replacement, and saving the owner's use costs. When the cover is extended, the pop-up wiper device makes the front of the vehicle look neater and smoother.Compared with the traditional abrupt wiper design, this hidden design is more integrated with the overall appearance of the vehicle, especially for some vehicles with fashionable appearance design concepts, the device can enhance the grade of the vehicle and give people a more refined visual feeling, which is in line with the pursuit of vehicle aesthetics by modern consumers. The cover fills the gap between the front windshield and the hood cover, eliminating this detail defect that may affect the overall appearance of the vehicle, making the front lines of the vehicle more coherent and enhancing the overall visual effect of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A vertical cross-sectional view of a pop-up wiper device according to the present invention;

[0026] Figure 2 A bottom view of the hood cover of the present invention;

[0027] Among them, 1 is the hood cover, 2 is the cover box, 3 is the cover drive motor, 4 is the guide rail, 5 is the raised structure, 6 is the cover, 7 is the ball hinge, 8 is the wiper, 9 is the front windshield, 10 is the front wall sheet metal, 11 is the wiper drive motor, 12 is the front wall water channel sheet metal, 13 is the seal, 14 is the transmission mechanism, and 15 is the slider. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. In the description of the present invention, it should be understood that the orientations or positional relationships indicated by the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0029] The present invention describes the positions of the components based on the front and rear directions of the vehicle body, that is, the position of the front of the vehicle is the front, and the position of the rear of the vehicle is the rear.

[0030] like Figure 1As shown in FIG. 2 , in some embodiments, a pop-up wiper device for reducing wind noise includes a wiper drive motor 11 fixed on a front dash panel sheet metal 12 (the front dash panel sheet metal 12 is fixedly connected to the front dash panel sheet metal 10) and a cover box 2 fixed under the hood cover 1, the drive end of the wiper drive motor 11 is connected to a wiper 8, the rear portion of the cover box 2 is located above the wiper drive motor 11, a seal 13 is fixed between the front portion of the front dash panel sheet metal 12 and the bottom of the cover box 2 for filling the gap therebetween and preventing rainwater from entering the interior of the front cabin, a cover plate 6 is provided in the cover box 2, which can extend out of the cover box 2, fill the gap between the bottom of the front windshield 9 and the hood cover 1, or retract into the cover box 2, when the cover plate 6 is extended, the wiper 8 can be recovered into the space surrounded by the front dash panel sheet metal 12, the cover box 2, the cover 6 and the front windshield 9.

[0031] Embodiment 1:

[0032] like Figure 2 As shown, on the basis of the pop-up wiper device for reducing wind noise in some of the above embodiments, the layout position of the cover box is further designed: the rear surface of the cover box 2 is flush with the rear surface of the hood cover 1, and the left and right sides and the front of the cover box 2 are all located within the coverage of the hood cover 1. The cover box 2 does not exceed the coverage area of ​​the hood cover 1, and the air flow can flow through this area relatively smoothly during the driving of the vehicle. Because there is no sudden change in airflow caused by protrusions or depressions, the generation of air turbulence can be reduced, which helps to reduce wind resistance. Lower wind resistance can not only improve the fuel economy of the vehicle (for fuel vehicles) or endurance (for new energy vehicles), but also reduce the noise caused by wind resistance, that is, further reduce wind noise and make the interior environment quieter.

[0033] Embodiment 2:

[0034] like Figure 1 As shown, on the basis of the pop-up wiper device for reducing wind noise in some of the above embodiments or embodiment 1, the seal 13 is further designed: the seal 13 is fixed on the front water flow channel sheet metal 12 along the width direction of the vehicle body, and the bottom of the cover box 2 is provided with a raised structure 5 arranged along the width direction of the vehicle body and in close contact with the seal 13. The raised structure 5 is in close contact with the seal 13, which can greatly reduce the small gap that may exist between the two compared with the ordinary plane fit. During the driving process of the vehicle, even if it is affected by external factors such as vibration and air flow impact, this close contact relationship can better maintain the sealing state, effectively prevent rainwater, dust, etc. from entering from the gap between the bottom of the cover box 2 and the front water flow channel sheet metal 12, and further improve the waterproof, dustproof and other sealing properties. The seal 13 can be a rubber sealing strip, a silicone sealing pad, a foam sealing material, a PVC sealing strip, etc.

[0035] Embodiment three:

[0036] like Figure 1 As shown, on the basis of the pop-up wiper device for reducing wind noise in some of the above embodiments or embodiment 1 or embodiment 2, the cover plate 6 is further designed: the rear surface of the cover plate 6 is an inclined surface that fits the front windshield 9, and a buffer is arranged on the inclined surface. The rear part of the cover plate 6 is an inclined surface that fits the front windshield 9, and its purpose is to better match the shape of the bottom of the front windshield 9. Since the bottom of the front windshield 9 is usually not a completely vertical plane, but has a certain inclination, the inclined surface can make the cover plate 6 fit tightly and smoothly on the bottom of the windshield 9 when extended, reducing the gap between the two, so as to play a more effective role in waterproofing, wind noise prevention, etc. A buffer is arranged on the inclined surface, which can play a buffering role when the cover plate fits the front windshield. It can be made of various elastic materials, such as rubber, sponge, etc. The presence of the buffer member prevents scratches, collisions and other damages between the cover plate 6 and the glass due to rigid contact when the cover plate 6 is in contact with the front windshield 9, regardless of the vibration during driving of the vehicle or when the cover plate 6 is extended or retracted, thereby protecting the surface integrity of the front windshield 9 and the cover plate 6 itself.

[0037] Embodiment 4:

[0038] like Figure 1As shown in FIG. 2, on the basis of the pop-up wiper device for reducing wind noise in some of the above embodiments or embodiment 1 or embodiment 2 or embodiment 3, the driving structure of the cover plate 6 is further designed: a cover plate guide mechanism and a cover plate drive mechanism are arranged in the cover plate box 2; the cover plate 6 can be moved toward the front windshield 9 along the guide direction or retracted away from the front windshield 9 into the cover plate box 2 by the action of the cover plate guide mechanism; the cover plate drive mechanism can drive the cover plate 6 to move along the guide direction. The cover plate guide mechanism and the cover plate drive mechanism are both fixed to the top of the cover plate box 2. The cover plate guide mechanism includes a guide rail 4 fixed on the inner wall of the cover plate box 2 and a slider 15 arranged on the guide rail 4, and the cover plate 6 is fixed on the slider 15. The cover plate drive mechanism includes a cover plate drive motor 3, and the driving end of the cover plate drive motor 3 is connected to the slider 15 through a transmission mechanism 14, so that the slider 15 moves linearly along the guide rail 4. The transmission mechanism 14 includes a gear rack mechanism, a screw nut mechanism and a worm gear mechanism. The guide rail 4 provides a precise guide path for the cover 6, and its stable position fixed on the inner wall of the cover box 2 ensures the accuracy of the movement path of the slider 15 and the cover 6. The low-friction sliding of the slider 15 on the guide rail 4 is strictly carried out in accordance with the shape and direction of the guide rail 4, so that the cover 6 fixed on the slider 15 can accurately reach the specified position such as the gap between the front windshield 9 and the hood cover 1, effectively realizing the functions of reducing wind noise and waterproofing. Only when the cover 6 accurately fills the gap can these functions be maximized. The cover drive motor 3 transmits power to the slider 15 through the transmission mechanism 14, so that the slider 15 can continuously and smoothly move in a straight line along the guide rail 4. The respective characteristics of different transmission mechanisms 14 help to achieve this goal. For example, the efficient transmission of the gear rack mechanism can ensure the timeliness and accuracy of power transmission; the self-locking function of the screw nut mechanism can ensure the accurate stop and start of the cover plate 6 at a specific position; the large transmission ratio and self-locking ability of the worm gear mechanism can also make the movement of the cover plate 6 more controllable, thereby achieving the continuity of the movement of the cover plate 6 and ensuring the normal operation of the entire device. The low-friction sliding of the slider 15 on the guide rail 4 and the reasonable matching mode of the various components in the transmission mechanism 14 are all helpful to reduce the friction between the components. For example, the good meshing of the gear and the rack in the gear rack mechanism, the relative movement of the screw and the nut in the screw nut mechanism, and the matching of the worm wheel and the worm in the worm gear mechanism can all reduce the friction coefficient, thereby extending the service life of the guide rail 4, the slider 15, the cover plate 6, the various components of the transmission mechanism 14, and the cover plate drive motor 3. Since the movement of the cover plate 6 is achieved by the orderly movement of the slider 15 on the guide rail 4 and the reasonable drive of the drive mechanism, this avoids the direct collision of the cover plate 6 with the inner wall or other components of the cover plate box 2 during the movement. The cover plate 6 needs to be made of lightweight plastic parts so that it can be conveniently hung upside down on the guide rail 4 and moved forward and backward.The cover box 2 needs to be made of plastic with greater rigidity, and even reinforcing ribs can be designed thereon to reduce fatigue damage caused by impact when the wiper is recovered, thereby increasing the service life of the cover box 2. The working environment of the seal 13 is humid and is responsible for blocking rainwater. Corrosion resistance should be considered, and rubber that is not easily corroded can be preferably used for production.

[0039] The following takes Example 4 as an example to illustrate the working method of the pop-up wiper device for reducing wind noise: when the wiper 8 is needed to work, the cover driving motor 3 is activated, and the cover 6 fixed on the slider 15 is driven to retract into the cover box 2 through the transmission mechanism 14. The wiper 8 is fixed on the spherical hinge 7, and the driving end of the wiper driving motor 11 is connected to the spherical hinge 7, thereby driving the wiper 8 to work and scrape off the droplets on the front windshield 9. When the wiper 8 is not needed to work, the wiper driving motor 11 drives the wiper 8 to work, and the wiper 8 returns to a horizontal state, and the cover driving motor 3 is activated, and the cover 6 fixed on the slider 15 is driven through the transmission mechanism 14 to extend out of the cover box 2 and fill the gap between the bottom of the front windshield 9 and the hood cover 1. At this time, the inclined surface at the rear of the cover 6 cooperates with the bottom of the front windshield 9, and the buffer is pressed between the bottom of the front windshield 9 and the rear surface of the cover 6.

[0040] In summary, the wiper 8 uses the wiper drive motor 11 fixed on the front water trough sheet metal 12 as the power source, and the motor drive end is connected to the wiper 8, which is the basic structure for realizing the normal swing of the wiper to clean the windshield. The cover box 2 under the hood cover 1 is an important part of the device. Its rear part is located above the wiper drive motor 11, and cooperates with the front water trough sheet metal 12. The gap between the two is filled by the seal 13, which effectively prevents rainwater from entering the front cabin. This plays a good protective role for the components in the cabin and avoids rust, short circuit and other problems caused by rainwater erosion. The cover plate 6 set in the cover box 2 can be extended or retracted. When extended, it can fill the gap between the bottom of the front windshield 9 and the hood cover 1; when the cover plate 6 is extended and the wiper 8 is retracted, the wiper 8 can be located in the space surrounded by the front water trough sheet metal 12, the cover box 2, the cover plate 6 and the front windshield 9. Under normal working conditions, the wiper 8 swings under the drive of the wiper drive motor 11 to clean the windshield. When the wiper 8 is not needed or in special circumstances (such as parking), the cover plate 6 is extended, and the wiper 8 can be retracted into a specific space. At the same time, the cover plate 6 fills the gap, changing the situation where the traditional wiper is exposed to the outside. When the vehicle is driving, the gap between the bottom of the front windshield 9 and the hood cover 1 will disturb the airflow, generate turbulence and cause wind noise. After filling this gap, the extendable cover plate 6 allows the airflow to flow more smoothly through the front of the vehicle, reducing the noise caused by the turbulent airflow. According to aerodynamic research, a smooth airflow surface can significantly reduce the generation of wind noise. This design is equivalent to creating a smoother transition area for the airflow in the front of the vehicle. Traditional wipers are still exposed to the airflow when not in use, and their own structure and position will interfere with the airflow and become one of the sources of wind noise. The cover plate 6 of the pop-up wiper device covers the top when the wiper is retracted, effectively avoiding the interference of the wiper on the airflow, further reducing the wind noise level, improving the quietness of the car, and providing a more comfortable riding environment for the driver and passengers, especially when driving at high speeds. The wind noise reduction effect is more obvious. When the wiper 8 is retracted into the enclosed space, the cover plate 6 can prevent dust, bird droppings, leaves and other debris from falling directly on the wiper 8. If these debris are attached to the wiper 8 for a long time, the wiper rubber strip will be worn when the wiper 8 is used next time, reducing the cleaning effect and service life of the wiper. At the same time, when parking in bad weather (such as heavy rain, heavy snow, etc.), the cover plate 6 can also protect the wiper 8 from the accumulation of ice and snow, and prevent the wiper 8 from being frozen or deformed due to the weight of ice and snow. During the driving process of the vehicle, various chemicals on the road (such as snow melting agents, oil stains, etc.) may splash onto the wiper 8 with rain. With the protection of the cover plate 6, the chances of these chemicals contacting the wiper 8 are greatly reduced, thereby reducing the possibility of corrosion of the wiper rubber strip, ensuring that the wiper 8 is in good working condition for a long time, reducing the replacement frequency of the wiper 8, and saving the owner's use cost. When the cover plate 6 is extended, the pop-up wiper device makes the front of the vehicle look neater and smoother.Compared with the traditional abrupt wiper design, this hidden design is more integrated with the overall appearance of the vehicle, especially for some vehicles with fashionable appearance design concepts, the device can enhance the grade of the vehicle, visually giving people a more refined feeling, which meets the pursuit of vehicle aesthetics by modern consumers. The cover plate 6 fills the gap between the front windshield 9 and the hood cover 1, eliminating this detail defect that may affect the overall appearance of the vehicle, making the front lines of the vehicle more coherent and enhancing the overall visual effect of the vehicle.

[0041] It should be noted that the description of the above technical solutions is exemplary, and this specification can be embodied in different forms and should not be construed as being limited to the technical solutions set forth herein. On the contrary, providing these descriptions will make the disclosure of the present invention thorough and complete, and will fully convey the scope disclosed in this specification to those skilled in the art. In addition, the technical solution of the present invention is limited only by the scope of the claims. In the case of using "including", "having" and "comprising" described in this specification, there may also be another part or other parts, and the terms used may generally be singular but may also represent plural forms. Finally, it should be pointed out that the above embodiments are only more representative examples of the present invention. Obviously, the present invention is not limited to the above embodiments, and there may be many variations. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention shall be deemed to belong to the protection scope of the present invention.

Claims

1. A pop-up wiper device for reducing wind noise, comprising a wiper drive motor (11) fixed to a front dash trough sheet metal (12), wherein a drive end of the wiper drive motor (11) is connected to a wiper (8), and characterized in that: It also includes a cover box (2) fixed below the hood cover (1), the rear portion of the cover box (2) being located above the wiper drive motor (11), a seal (13) being fixed between the front portion of the front water trough sheet metal (12) and the bottom of the cover box (2) for filling the gap between the two and preventing rainwater from entering the interior of the front cabin, a cover plate (6) being arranged in the cover box (2) and being able to extend out of the cover box (2) and fill the gap between the bottom of the front windshield (9) and the hood cover (1) or be retracted into the cover box (2), and when the cover plate (6) is extended, the wiper (8) can be recovered into the space enclosed by the front water trough sheet metal (12), the cover box (2), the cover plate (6) and the front windshield (9).

2. The pop-up wiper device for reducing wind noise according to claim 1, characterized in that: The cover box (2) is fixed within the bottom surface coverage area of ​​the hood cover (1).

3. The pop-up wiper device for reducing wind noise according to claim 1, characterized in that: The sealing member (13) is fixed to the front dash panel (12) along the width direction of the vehicle body, and the bottom of the cover box (2) is provided with a protruding structure (5) arranged along the width direction of the vehicle body and in close contact with the sealing member (13).

4. The pop-up wiper device for reducing wind noise according to claim 1, characterized in that: The rear part of the cover plate (6) is provided with an inclined surface which fits the front windshield glass (9), and a buffer is provided on the inclined surface.

5. The pop-up wiper device for reducing wind noise according to claim 1, characterized in that: The cover plate box (2) is provided with a cover plate guiding mechanism and a cover plate driving mechanism; the cover plate (6) can be moved toward the front windshield (9) along a guiding direction or retracted away from the front windshield (9) into the cover plate box (2) by the action of the cover plate guiding mechanism; the cover plate driving mechanism can drive the cover plate (6) to move along the guiding direction.

6. The pop-up wiper device for reducing wind noise according to claim 5, characterized in that: The cover plate guiding mechanism and the cover plate driving mechanism are both fixed to the top of the cover plate box (2).

7. The pop-up wiper device for reducing wind noise according to claim 6, characterized in that: The cover plate guiding mechanism comprises a guide rail (4) fixed on the inner wall of the cover plate box (2) and a slider (15) arranged on the guide rail (4), and the cover plate (6) is fixed on the slider (15).

8. The pop-up wiper device for reducing wind noise according to claim 7, characterized in that: The cover plate driving mechanism comprises a cover plate driving motor (3), wherein the driving end of the cover plate driving motor (3) is connected to the slider (15) via a transmission mechanism (14), so that the slider (15) moves linearly along the guide rail (4).

9. The pop-up wiper device for reducing wind noise according to claim 8, characterized in that: The transmission mechanism (14) comprises a gear rack mechanism, a screw nut mechanism and a worm gear mechanism.

10. A method for operating a pop-up wiper device with reduced wind noise according to any one of claims 1 to 9, characterized in that: When the wiper (8) needs to work, the cover plate (6) is retracted into the cover plate box (2), and the wiper drive motor (11) drives the wiper (8) to move to scrape off the liquid droplets on the front windshield (9); when the wiper (8) does not need to work, the wiper drive motor (11) drives the wiper (8) to move, the wiper (8) returns to a horizontal state, and the cover plate (6) extends out of the cover plate box (2) to fill the gap between the bottom of the front windshield (9) and the hood cover (1).

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