Wiper structure for reducing aerodynamic lift force

Abstract

A wiper structure for reducing aerodynamic lift force, relating to the technical field of wipers. The wiper structure comprises a wiper and a wiper arm (1). After the wiper is assembled with the wiper arm (1), the wiper is rotatable about an axis along a wiping direction by means of a rotating shaft hole structure; the wiper arm (1) comprises a connecting member (2) connected to the wiper, the connecting member (2) is provided with a pressure-bearing surface, and the pressure-bearing surface comprises a main windward surface (20) arranged on the connecting member (2) and capable of reducing an airflow speed and reducing the lift force induced by wind resistance on the wiper when a vehicle is traveling at a high speed; the wiper comprises an air deflector (5), an elastic strip (14) snap-fitted into the air deflector (5), a support (6) on the elastic strip (14), and an accessory (7) on the support (6), wherein the accessory (7) is rotatably connected to the support (6), a wiper blade element (8) is snap-fitted at the lower end of the air deflector (5), and fastening clips (9) are mounted on two sides of the air deflector (5); the accessory (7) is provided with a first windward surface (10) for relieving frontal wind pressure and counteracting aerodynamic lift force, the air deflector (5) is provided with a fourth windward surface (11), and each fastening clip (9) is provided with a fifth windward surface (12); and the main windward surface (20) is arranged above the air deflector (5), the air deflector (5) is provided with an upper flow guide wing (16) above the elastic strip (14), and the air deflector (5) is provided with a lower flow guide wing (17) below the elastic strip (14) for reducing wind lift force, wherein the lower flow guide wing (17) extends in a direction towards the wiper blade (8). By means of the multiple windward surfaces and optimized design, required pressure from the wiper arm (1) is reduced, thereby decreasing wiping noise of the wiper and moto

Description

A wiper structure that reduces wind resistance and lift. Technical Field

[0001] This invention relates to the field of windshield wiper technology, specifically to a wiper structure that reduces wind resistance and lift. Background Technology

[0002] With the development of new energy vehicles, their sales are rapidly increasing, currently surpassing those of gasoline vehicles. New energy vehicles place increasingly higher demands on windshield wipers. During operation, wipers generate noise from the motor and the blades wiping the glass. Since new energy vehicles lack engine noise, the noise from the wipers and their motors is more easily perceived by the driver and passengers. Therefore, the noise requirements for windshield wipers in new energy vehicles are much higher than those in gasoline vehicles. Currently, most wiper arm structures on the market are hook-type or connector-type structures. These structures suffer from poor high-speed anti-drift performance. To address the issue of clean wiping at high speeds... This would require significantly increasing the downforce of the wiper arm, which would increase the load on the wiper and its motor, leading to increased noise and a poor user experience. This would not meet the requirements of new energy vehicles for wipers. Therefore, the market needs a wiper structure that can reduce the wind lift force under high-speed conditions, thereby reducing the downforce of the wiper arm and the noise of the wipers wiping the glass, especially when the wipers are changing direction. At the same time, the lower downforce of the wiper arm reduces the load on the wiper motor, thus reducing the noise of the wiper motor. The reduced motor load allows for a smaller motor size and power, and also reduces the power consumption of the wiper, thereby contributing to energy conservation and emission reduction. Summary of the Invention

[0003] The present invention aims to solve the above-mentioned technical problems by providing a wiper structure that reduces wind resistance and lift.

[0004] To solve the above-mentioned technical problems, the technical solution provided by the present invention is as follows:

[0005] A wiper structure for reducing wind resistance and lift includes a wiper and a wiper arm. The wiper is connected to the wiper arm, and after the wiper arm is assembled, the wiper can be rotated along the wiping direction axis through a rotating shaft hole structure.

[0006] The wiper arm includes a connector connected to the wiper, the connector being provided with a pressure-bearing surface; the pressure-bearing surface includes a total windward surface provided on the connector to reduce airflow speed and reduce the lifting force of the wiper caused by wind resistance when the vehicle is traveling at high speed.

[0007] The wiper includes a deflector, a spring clip snapped into the deflector, a bracket on the spring clip, and an accessory on the bracket. The accessory and the bracket are rotatably connected. A wiper blade is snapped into the lower end of the deflector, and buckles are installed on both sides of the deflector.

[0008] The accessory is provided with a windward surface one for frontal airflow relief and wind lift force counteracting, the guide vane is provided with a windward surface four, and the buckle is provided with a windward surface five;

[0009] The overall windward surface is arranged above the air deflector and also has an upper air deflector wing. The air deflector is arranged below the air deflector wing to reduce wind lift force, wherein the air deflector wing extends in the direction of the wiper blade.

[0010] Preferably, the accessory has a protruding ridge on one side.

[0011] Preferably, the accessory has a notch for ventilation on one side, and the upper end of the notch is a V-shaped or U-shaped structure extending inward.

[0012] Preferably, the total windward surface includes windward surface two, windward surface three, or a combination of windward surface two and windward surface three, and the inclination angles of windward surface one, windward surface two, and windward surface three with the rotation axis are 20-70°.

[0013] Preferably, the lower guide vane and the guide plate form an angle α, the angle α being in the range of 100-170°.

[0014] Preferably, the scraper arm can be a one-piece or a multi-segment separately connected structure.

[0015] With the above structure, the present invention has the following advantages:

[0016] This invention reduces wiper arm pressure through multiple windward surfaces and optimized design, thereby reducing wiper noise and motor noise. It also meets the requirements for high-speed wiper anti-drift. Analysis and verification show that the original wiper pressure coefficient was designed to be 17 N / m. After the new structure reduces wind lift, the wiper's downward pressure can be designed to be around 14 N / m, significantly reducing wiper pressure and thus reducing the noise of the wipers swishing the glass, especially when the wipers are changing direction. Simultaneously, the lower wiper arm downward pressure reduces the load on the wiper motor, resulting in less motor noise. The reduced motor load allows for a smaller motor size and power, further reducing wiper power consumption and contributing to energy conservation and emission reduction.

[0017] The above overview is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of the invention will become readily apparent from the accompanying drawings and the following detailed description. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 is a schematic diagram of the structure of the present invention.

[0020] Figure 2 is a structural schematic diagram of the appendix of this invention.

[0021] Figure 3 is a schematic diagram of the notch structure of the present invention.

[0022] Figure 4 is a schematic diagram of the structure of the guide plate of the present invention.

[0023] Figure 5 is a schematic diagram of the wind force on the appendix of this invention.

[0024] Figure 6 is a schematic diagram of the structure of the support shaft of the present invention.

[0025] Figure 7 is a schematic diagram of the wind force on the notch of the present invention.

[0026] Figure 8 is a schematic diagram of the wind force acting on the guide vane of the present invention.

[0027] Figure 9 is a schematic diagram of the wind force analysis of the upper and lower guide vanes of the present invention.

[0028] Figure 10 is a schematic diagram of the wind force analysis of the guide vane of the present invention;

[0029] Figure 11 is a wind streamline diagram of the present invention;

[0030] Figure 12 is a schematic diagram of the pressure distribution of the present invention;

[0031] Figure 13 is a dynamic and static pressure bar chart of the present invention;

[0032] Figure 14 is a schematic diagram of the integrated scraper arm structure of the present invention;

[0033] Figure 15 is a schematic diagram of the scraper arm structure of the multi-segment separated connection structure of the present invention;

[0034] Figure 16 is a wind pressure distribution diagram of the present invention.

[0035] As shown in the figure: 1. Wiper arm; 2. Connector; 3. Windward side two; 4. Windward side three; 5. Deflector; 6. Bracket; 7. Accessory; 8. Wiper blade; 9. Clip; 10. Windward side one; 11. Windward side four; 12. Windward side five; 13. Ridge; 14. Spring; 15. Notch; 16. Upper deflector; 17. Lower deflector; 18. Pole head; 19. Arm; 20. Overall windward side. Detailed Implementation

[0036] The embodiments of this application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0037] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0038] The present invention will now be described in further detail with reference to the full text.

[0039] Referring to Figures 1-15, a wiper structure for reducing wind resistance and lift force is provided. The wiper structure includes a wiper and a wiper arm. The wiper is connected to the wiper arm 1. After the wiper arm 1 is assembled, it can be rotated along the wiping direction axis through a rotating shaft hole structure.

[0040] The wiper arm 1 includes a connector 2 connected to the wiper blade, which has a pressure-bearing surface. The pressure-bearing surface includes a total windward surface on the connector 2 that reduces airflow speed and the lift force generated by wind resistance on the wiper blade during high-speed driving. The connector 2 has a second windward surface 3 and a third windward surface 4. The wiper blade includes a guide vane 5, a spring clip 14 snapped into the guide vane 5, a bracket 6 on the spring clip 14, and an accessory 7 on the bracket 6. The accessory 7 and the bracket 6 are rotatably connected. A wiper blade 8 is snapped into the lower end of the guide vane 5. The blade 5 has clips 9 installed on both sides; the accessory 7 has a windward surface 10 for frontal airflow relief and wind-lift force cancellation, the guide plate 5 has a windward surface 4 11, and the clips 9 have a windward surface 5 12; the wiper arm and wiper are designed with the windward surface structure of minimum wind-lift force obtained through optimal aerodynamic analysis of windward surface 10, windward surface 4 11, windward surface 5 12, windward surface 2 3 and windward surface 3 4, which can effectively reduce the wind resistance of the wiper on the wiper at high speed, so that the wiper can better wipe the glass.

[0041] In specific implementation, this invention is illustrated in Figures 2, 3, 5, 6, and 7. Attachment 7 has a protruding ridge 13 on one side. Unlike conventional wipers, Attachment 7 features a windward surface 10 and the protruding ridge 13. The windward surface 10 can deflect some of the force when the wind blows directly, acting in the opposite direction to the downward pressure of the wiper, thereby counteracting the wind-lift force and reducing the wiper's lifting force. Attachment 7 also has a pressable spring 18 with a boss 19. The connecting piece 2 has a groove for cooperating with the spring 18. The upper end of the notch 15 has an inwardly extending V-shaped or U-shaped structure, as shown in Figures 3 and 7. Oncoming wind can be discharged from the notch 15, and the V-shaped or U-shaped structure at the upper end of the notch 15 can guide the oncoming wind, thereby counteracting the wind-lift force and reducing the wiper's lifting force.

[0042] In a specific implementation of the present invention, as shown in Figure 6, the total windward surface includes windward surface 2 3 or windward surface 3 4 or a combination of windward surface 2 3 and windward surface 3 4. The inclination angle between windward surface 1 10, windward surface 2 3 and windward surface 3 4 and the rotation axis is between 20-70°, with the optimal angle being between 30-60°.

[0043] In a specific implementation of the present invention, as shown in Figure 7, a notch 15 for ventilation is provided on one side of the attachment 7. The notch 15 serves to ventilate the attachment. When wind blows upward from below the attachment 7 and generates a lifting force, the ventilation notch 15 provided on the attachment 7 can effectively vent the wind out of the attachment, thereby reducing the lifting force and playing a role in preventing drifting at high speed.

[0044] In a specific implementation of this invention, as shown in Figures 9 and 10, an upper guide vane 16 is installed at the upper end of the guide vane 5, and a lower guide vane 17 is installed on the lower front side of the guide vane 5. The total windward surface is located above the spring piece 14 of the guide vane 5, and the guide vane 5 is also provided with the upper guide vane 16 and the guide vane 5 is provided with the guide vane 17 below the spring piece 14, which are used to reduce the wind lift force. The guide vane 17 extends towards the wiper blade 8, and the lower guide vane 17 and the guide vane 5 form an angle α, which is in the range of 100-170°. The guide vane is provided with two guide vanes, upper and lower. The upper guide vane 16, through aerodynamic analysis, converts wind force into downforce for the wiper. The lower guide vane 17 reduces the wind lift force by distributing it along the guide vane. This dual approach greatly reduces the wind lift force of the wiper.

[0045] The tilt angles of windward surfaces 2 (3) and 3 (4) are between 20-70°, preferably between 30-60°. Windward surfaces 2 (3) and 3 (4) can reduce the lift force of the windshield wipers.

[0046] This invention utilizes optimal aerodynamic analysis of the windward surfaces 10, 11, 12, 3, and 4, and also incorporates an exhaust vent 15. The vent 15 serves to exhaust air, allowing wind to blow upwards from below the accessory 7. The upper deflector 16, through aerodynamic analysis, converts wind force into downward pressure on the wiper blades. The lower guide vane 17 distributes the lift force along the guide vane, thus reducing the lift force. This dual approach significantly reduces the lift force on the wiper blades, effectively minimizing the lift force caused by wind resistance at high speeds, allowing the wipers to clean the glass more effectively.

[0047] The structure with the minimum wind lift force is obtained through the interaction between multiple windward surfaces, lower guide vane 17, upper backflow vane 16, ridge 13 and notch 15. This structure can effectively reduce the lift force of the windshield wipers caused by wind resistance at high speeds, thus enabling the wipers to better clean the glass.

[0048] The scraper arm 1 can be a one-piece or multi-segment separate connection structure. Specifically, as shown in Figure 14, the one-piece connector 2 is directly connected to the scraper arm head 18 to form a one-piece structure.

[0049] As shown in Figure 15, the multi-segment separation connection structure is a structure in which the connector 2 is connected to the arm 19; it can also be a structure in which the connector 2 is connected to the scraper, the scraper is connected to the arm 19, and the arm 19 is connected to the rod head 18.

[0050] As shown in Figure 16, based on CFD fluid dynamics analysis, the wind pressure distribution at several characteristic locations is shown in Figure 16. In Figure 16, a is the wind pressure distribution at the front end of the guide vane 5, b is the wind pressure distribution at the connector 2, and c is the wind pressure distribution at the rear end of the guide vane 5. It can be seen that wind pressure is formed at the top of the product, thereby increasing the downforce of the product and offsetting the lifting force of the product, thus ensuring that the wiper has sufficient downforce.

[0051] Experimental test:

[0052] The wiper of the present invention was placed in a car for simulation testing, using wipers with lengths of 625mm and 450mm, and the test was conducted at a speed of 160km / h.

[0053] As shown in Figures 11 and 12, a vortex is formed between the ventilation hood and the engine cover. Influenced by the secondary wiper arm head, the vortex flows towards the glass, forming an axial vortex that passes over the wiper blades and extends to the outlet. This increases lift to some extent. The airflow passing through the wiper arm brushes creates a vortex behind the wiper arm brushes.

[0054] The structures after testing are shown in Table 1.

[0055] Table 1

[0056] As shown in Table 1 and Figure 13, the overall lifting force of the main scraper arm is 0.261N, and the pressure distributed on the scraper brush is 0.42N / m. The downward pressure of the main scraper arm is designed to be 14N / m. Therefore, the minimum arc-shaped pressure distribution of the main scraper is 13.58N / m, which meets the design requirements.

[0057] The overall lifting force of the secondary scraper arm is 0.07N, and the pressure distributed on the scraper brush is 0.16N / m. The downward pressure of the secondary scraper arm is designed to be 14N / m. Therefore, the minimum arc-shaped pressure distribution of the secondary scraper arm is 13.84N / m, which meets the design requirements. The specific results will be subject to the actual vehicle matching.

[0058] The present invention and its embodiments have been described above. This description is not restrictive, and the embodiments shown throughout are only one of the embodiments of the present invention. The actual structure is not limited to this. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the present invention, they should all fall within the protection scope of the present invention.

Claims

1. A wiper structure for reducing wind resistance and lift force, characterized in that, It includes a wiper and a wiper arm (1), wherein the wiper is connected to the wiper arm (1), and the wiper can be rotated along the wiping direction axis by rotating the shaft hole structure after the wiper arm (1) is assembled. The wiper arm (1) includes a connector (2) connected to the wiper, the connector being provided with a pressure-bearing surface; the pressure-bearing surface includes a total windward surface (20) provided on the connector (2) that can reduce airflow speed and reduce the lifting force of the wiper on the wiper caused by wind resistance when the car is traveling at high speed; The wiper includes a deflector (5), a spring clip (14) snapped into the deflector (5), a bracket (6) on the spring clip (14) and an accessory (7) on the bracket (6). The accessory (7) and the bracket (6) are rotatably connected. A wiper blade (8) is snapped into the lower end of the deflector (5). Buckles (9) are installed on both sides of the deflector (5). The accessory (7) is provided with a windward surface one (10) for frontal airflow relief and wind lifting force offset, the guide plate (5) is provided with a windward surface four (11), and the buckle (9) is provided with a windward surface five (12). The total windward surface is set above the spring plate (14) of the guide plate (5) and is also provided with an upper guide wing (16). The guide plate (5) is provided with a lower guide wing (17) below the spring plate (14) to reduce wind lifting force. The lower guide wing (17) extends in the direction of the wiper blade (8).

2. The wiper structure for reducing wind resistance and lift force according to claim 1, characterized in that: The accessory (7) has a protruding ridge (13) on one side.

3. The wiper structure for reducing wind resistance and lift force according to claim 1, characterized in that: The accessory (7) has a notch (15) for ventilation on one side, and the upper end of the notch (15) is a V-shaped or U-shaped structure extending inward.

4. The wiper structure for reducing wind resistance and lift force according to claim 1, characterized in that: The total windward surface (20) includes windward surface two (3) or windward surface three (4) or a combination of windward surface two (3) and windward surface three (4), and the angle between windward surface one (10), windward surface two (3) and windward surface three (4) and the rotation axis is 20-70°.

5. The wiper structure for reducing wind resistance and lift force according to claim 1, characterized in that: The lower guide vane (17) and the guide plate (5) form an angle α, which ranges from 100° to 170°.

6. The wiper structure for reducing wind resistance and lift force according to claim 1, characterized in that: The scraper arm (1) can be a one-piece or a multi-segment separate connection structure.

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