Wiper structure capable of reducing wind resistance lifting force

Abstract

The invention relates to a wiper structure capable of reducing wind resistance lifting force, and belongs to the technical field of wipers, the wiper structure comprises a wiper and a wiper arm, the wiper arm comprises a wiper rod and a connecting piece on one side of the wiper rod, and the connecting piece is provided with a second windward side and a third windward side. According to analysis and verification, the pressure coefficient of an original windscreen wiper is designed to be 17n / m, after the wind lifting force is reduced through a new structure, the downward pressure of the windscreen wiper can be designed to be about 12N / m, the pressure of the windscreen wiper is greatly reduced, and therefore the purposes of reducing the sound generated when the windscreen wiper is used for brushing glass and reducing the noise generated when the windscreen wiper is used for brushing the glass are achieved. And meanwhile, the downward pressure of the wiper arm is small, the load of the wiper motor is reduced, so that the noise of the wiper motor is reduced, the size and the power of the motor can be reduced by reducing the load of the motor, the power consumption of the wiper can also be reduced, and the effects of energy conservation and emission reduction are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of windshield wipers, and specifically refers to a wiper structure for reducing wind resistance lift force. Background Art

[0002] With the development of new energy vehicles, the number of new energy vehicles is increasing rapidly. Currently, the sales volume has exceeded that of fuel vehicles. The requirements for windshield wipers in new energy vehicles are getting higher and higher. During the operation of the windshield wiper, there will be motor working noise and the sound of the wiper blade scraping the glass. Since new energy vehicles do not have the sound of the vehicle engine, the sound of the windshield wiper and the wiper motor is more likely to reach the human ear, making the driver and passengers feel the noise. Therefore, the noise requirements for windshield wipers in new energy vehicles are much higher than those in fuel vehicles. Currently, the matching structures of the wiper arms in the market are mostly hook-shaped and connecting-piece-shaped structures, and these structures have problems with poor anti-floating performance at high speeds. To solve the problem of the windshield wiper scraping cleanly at high speeds, it is necessary to increase the downward pressure of the wiper arm a lot, which will lead to an increase in the load of the windshield wiper and the wiper motor, resulting in high noise and a poor user experience, and cannot meet the requirements of new energy vehicles for windshield wipers. Therefore, the market needs a windshield wiper structure with a small wind lift force for the windshield wiper under high-speed requirements, so as to reduce the downward pressure of the wiper arm, and at the same time, reduce the sound of the wiper blade scraping the glass, especially the sound during the wiper commutation. At the same time, with a small downward pressure of the wiper arm, the load of the wiper motor is reduced, so the noise of the wiper motor is reduced. Reducing the motor load can reduce the size and power of the motor, and at the same time, reduce the power consumption of the windshield wiper, thus playing a role in energy conservation and emission reduction. Summary of the Invention

[0003] The present invention aims to solve the above technical problems and provides a wiper structure for reducing wind resistance lift force.

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

[0005] A wiper structure for reducing wind resistance lift force, comprising a windshield wiper and a wiper arm. The windshield wiper is connected to the wiper arm, and after the windshield wiper is assembled with the wiper arm, it can rotate along the axis of the wiping direction through a rotating shaft hole structure;

[0006] The wiper arm includes a connecting piece connected to the windshield wiper, and the connecting piece is provided with a bearing surface; the bearing surface includes a total windward surface provided on the connecting piece that can reduce the air flow velocity and reduce the lift force generated by the wind resistance of the windshield wiper on the windshield wiper in the high-speed driving posture of the vehicle;

[0007] The windshield wiper includes a deflector, a spring piece clamped in the deflector, a bracket on the spring piece, and an accessory on the bracket. The accessory is rotatably connected to the bracket. The lower end of the deflector is clamped with a wiper blade, and buckles are installed on both sides of the deflector;

[0008] The attachment is provided with a first windward surface for blowing air forward to relieve force and counteract the wind lift force, the deflector is provided with a fourth windward surface, and the buckle is provided with a fifth windward surface;

[0009] The total windward surface is arranged above the elastic piece of the deflector and is also provided with an upper deflector wing. The deflector is provided with a deflector wing below the elastic piece for reducing the wind lift force, and the extending direction of the deflector wing is towards the wiper blade.

[0010] Preferably, a protruding ridge is provided on one side of the attachment.

[0011] Preferably, a notch for exhausting air is formed on one side of the attachment;

[0012] Preferably, the upper end of the notch is a V-shaped or U-shaped structure extending inwards.

[0013] Preferably, the total windward surface includes a second windward surface or a third windward surface or a combination of the second windward surface and the third windward surface.

[0014] Preferably, the inclination angles of the first windward surface, the second windward surface and the third windward surface with the rotation axis are 20-70°;

[0015] Preferably, the lower deflector wing and the deflector form an included angle a, and the range of the included angle a is 100-170°.

[0016] Preferably, the wiper arm can be an integral type or a multi-segment separated connection structure.

[0017] After adopting the above structure, the present invention has the following advantages:

[0018] The present invention can reduce the pressure of the wiper arm through multiple windward surfaces and optimized design, thereby reducing the wiping noise and motor noise of the wiper. At the same time, it can meet the requirement of high-speed anti-floating of the wiper. Through analysis and verification, the pressure coefficient of the original wiper is designed to be 17 n / m. After reducing the wind lift force through the new structure, the downward pressure of the wiper can be designed to be about 14 N / m, greatly reducing the pressure of the wiper, thereby achieving the reduction of the sound of the wiper scraping the glass, especially the sound when the wiper changes direction. At the same time, the downward pressure of the wiper arm is small, the load of the wiper motor is reduced, so the noise of the wiper motor is reduced, and the reduction of the motor load can reduce the size and power of the motor, and at the same time, it can also reduce the power consumption of the wiper, thereby playing a role in energy conservation and emission reduction.

[0019] The above summary is only for the purpose of the specification and is not intended to be limiting in any way. In addition to the above-described illustrative aspects, embodiments and features, further aspects, embodiments and features of the present invention will be readily apparent by reference to the drawings and the following detailed description. Brief Description of the Drawings

[0020] To more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0021] Figure 1 It is a schematic structural diagram of the present invention.

[0022] Figure 2 It is a schematic structural diagram of an accessory of the present invention.

[0023] Figure 3 It is a schematic structural diagram of a notch of the present invention.

[0024] Figure 4 It is a schematic structural diagram of a deflector of the present invention.

[0025] Figure 5 It is a schematic diagram of the wind force received by an accessory of the present invention.

[0026] Figure 6 It is a schematic structural diagram of a support shaft of the present invention.

[0027] Figure 7 It is a schematic diagram of the wind force received by a notch of the present invention.

[0028] Figure 8 It is a schematic diagram of the wind force received by a deflector of the present invention.

[0029] Figure 9 It is a schematic diagram for analyzing the wind force received by the upper deflector wing and the lower deflector wing of the present invention.

[0030] Figure 10 It is a schematic diagram for analyzing the wind force received by a deflector of the present invention;

[0031] Figure 11 It is a wind force streamline diagram of the present invention;

[0032] Figure 12 It is a schematic diagram of the pressure distribution of the present invention;

[0033] Figure 13 It is a pressure histogram of the dynamic and static states of the present invention;

[0034] Figure 14 It is a schematic structural diagram of an integrated wiper arm of the present invention;

[0035] Figure 15 It is a schematic structural diagram of a wiper arm with a multi-segment separated connection structure of the present invention;

[0036] Figure 16 It is a wind pressure distribution diagram of the present invention.

[0037] As shown in the figure: 1. Wiper arm; 2. Connector; 3. Second windward surface; 4. Third windward surface; 5. Deflector; 6. Bracket; 7. Accessories; 8. Wiper blade; 9. Snap; 10. First windward surface; 11. Fourth windward surface; 12. Fifth windward surface; 13. Ridge; 14. Spring piece; 15. Notch; 16. Upper deflector wing; 17. Lower deflector wing; 18. Rod head; 19. Arm rod; 20. Total windward surface. Specific embodiments

[0038] The embodiments of the present application will be described in detail below. The examples of the embodiments are shown in the drawings, where 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 drawings are exemplary and are only used to explain the present application and should not be construed as a limitation of the present application.

[0039] In the description of the present application, it should be noted that unless otherwise clearly defined and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0040] The present invention will be further described in detail below in conjunction with the full text.

[0041] Combined with the attached Figures 1 - 15 , a windshield wiper structure for reducing wind resistance and lift force, a windshield wiper structure for reducing wind resistance and lift force, including a windshield wiper and a wiper arm. The windshield wiper is connected to the wiper arm 1. After the windshield wiper is assembled with the wiper arm 1, it can rotate along the axis of the wiping direction through a rotating shaft hole structure;

[0042] The wiper arm 1 includes a connecting member 2 connected to the wiper, and the connecting member is provided with a pressure-bearing surface; the pressure-bearing surface includes a total windward surface provided on the connecting member 2 that can reduce the air flow velocity and reduce the lifting force generated by the wind resistance on the wiper when the vehicle is driving at high speed; the connecting member 2 is provided with a second windward surface 3 and a third windward surface 4. The wiper includes a deflector 5, a spring piece 14 clamped in the deflector 5, a bracket 6 on the spring piece 14, and an accessory 7 on the bracket 6. The accessory 7 is rotatably connected to the bracket 6. The lower end of the deflector 5 is clamped with a wiper blade 8, and buckles 9 are installed on both sides of the deflector 5; the accessory 7 is provided with a first windward surface 10 for blowing air to relieve force and counteract the wind lifting force, the deflector 5 is provided with a fourth windward surface 11, and the buckle 9 is provided with a fifth windward surface 12; through the optimal aerodynamic analysis of the first windward surface 10, the fourth windward surface 11, the fifth windward surface 12, the second windward surface 3 and the third windward surface 4 of the wiper arm and the wiper, the windward surface structure with the minimum wind lifting force can effectively reduce the lifting force generated by the wind resistance on the wiper when the vehicle is at high speed, so that the wiper can better wipe the glass.

[0043] In the specific implementation of the present invention, such as Figure 2 , Figure 3 , Figure 5 , Figure 6 and Figure 7 shown. A protruding ridge 13 is provided on one side of the accessory 7. Specifically different from a conventional wiper, the accessory 7 is provided with a first windward surface 10 and a protruding ridge 13. The first windward surface 10 can divide a part of the force when blowing air from the front and act in the opposite direction on the downward pressure of the wiper, so as to counteract the wind lifting force and achieve the effect of reducing the lifting force of the wiper. A pressable spring tongue 18 is provided on the accessory 7, and a convex platform 19 is provided on the spring tongue 18. A groove for cooperating with the spring tongue 18 is opened on the connecting member 2. The upper end of the notch 15 is a V-shaped or U-shaped structure extending inward, as Figure 3 and Figure 7 shown. The 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 play a guiding role in the oncoming wind, so as to counteract the wind lifting force and achieve the effect of reducing the lifting force of the wiper.

[0044] In the specific implementation of the present invention, such as Figure 6 shown, the total windward surface includes the second windward surface 3 or the third windward surface 4 or the combination of the second windward surface 3 and the third windward surface 4. The inclination angles of the first windward surface 10, the second windward surface 3 and the third windward surface 4 with the rotation axis are between 20-70°, and the optimal selection is between 30-60°.

[0045] In the specific implementation of the present invention, such as Figure 7As shown in the figure, a notch 15 for exhausting air is provided on one side of the accessory 7. The notch 15 functions to exhaust air. When the wind blows upward from below the accessory 7 to the accessory, generating wind lift force, the exhaust notch 15 provided on the accessory 7 can effectively conduct the wind out of the accessory, thereby reducing the wind lift force and playing a role in preventing floating at high speeds.

[0046] In the specific implementation of the present invention, as Figure 9 and Figure 10 shown, an upper deflector wing 16 is installed at the upper end of the deflector vane 5, and a lower deflector wing 17 is installed at the lower front side of the deflector vane 5. The total windward surface is arranged above the deflector vane 5 on the elastic piece 14 and an upper deflector wing 16 is also provided. Below the elastic piece 14 of the deflector vane 5, a deflector wing 17 is provided to reduce the wind lift force. The extending direction of the deflector wing 17 is towards the direction of the wiper blade 8. An included angle a is formed between the lower deflector wing 17 and the deflector vane 5, and the range of the included angle a is 100 - 170°. The deflector vane is provided with two deflector wings, the upper deflector wing 16 converts the wind force into the downward pressure of the wiper through aerodynamic analysis, and the lower deflector wing 17 divides the wind lift force along the deflector wing to reduce the wind lift force. By combining these two methods, the wind lift force of the wiper is greatly reduced.

[0047] The inclination angles of the second windward surface 3 and the third windward surface 4 are between 20 - 70°, preferably between 30 - 60°. The second windward surface 3 and the third windward surface 4 can reduce the wiper lift force.

[0048] Through the optimal aerodynamic analysis of the first windward surface 10, the fourth windward surface 11, the fifth windward surface 12, the second windward surface 3 and the third windward surface 4 of the present invention, and also through the exhaust notch 15, the notch 15 functions to exhaust air. When the wind blows upward from below the accessory 7 to the accessory, the upper deflector wing 16 converts the wind force into the downward pressure of the wiper through aerodynamic analysis, and the lower deflector wing 17 divides the wind lift force along the deflector wing to reduce the wind lift force. By combining these two methods, the wind lift force of the wiper is greatly reduced, and it can effectively reduce the lift force generated by the wind resistance on the wiper in the high - speed attitude of the vehicle, so that the wiper can better wipe the glass.

[0049] Through the interaction between multiple windward surfaces, the lower deflector wing 17, the upper deflector wing 16, the ridge 13 and the notch 15, the structure with the minimum wind lift force is obtained, which can effectively reduce the lift force generated by the wind resistance on the wiper in the high - speed attitude of the vehicle, so that the wiper can better wipe the glass.

[0050] The wiper arm 1 can be an integral type or a multi - segment separated connection structure. Specifically, as Figure 14 shown, the integral connecting piece 2 is directly connected to the wiper arm rod head 18 to form an integral structure;

[0051] As Figure 15As shown, the multi-segment separation connection structure is a structure in which the connecting member 2 is connected to the arm 19; it can also be a structure in which the connecting member 2 is connected to the wiper bar, the wiper bar is connected to the arm 19, and the arm 19 is connected to the rod head 18.

[0052] As Figure 16 shown, according to the CFD hydrodynamic analysis, the wind pressure distribution at several characteristic positions, such as Figure 16 shown, where a is the wind pressure distribution at the front end of the deflector 5, b is the wind pressure distribution diagram of the connecting member 2, and c is the wind pressure distribution diagram at the rear end of the deflector 5. It can be seen that wind pressure is formed at the upper part of the product, thereby increasing the downward pressure of the product, offsetting the lifting force of the product, and thus ensuring that the wiper has sufficient downward pressure.

[0053] Experimental test:

[0054] Place the wiper of the present invention on a vehicle for simulation testing, using wipers with lengths of 625 mm and 450 mm, and conduct the test at a vehicle speed of 160 km / h.

[0055] As Figure 11 and Figure 12 shown, a vortex is formed between the ventilation hood panel and the engine hood. Affected by the head of the secondary wiper arm, the vortex deflects towards the glass direction, forming an axial vortex, passing above the wiper blade, and reaching the outlet. To a certain extent, the lifting force is increased. The wind passing through the wiper arm will form a vortex at the rear side of the wiper arm brushing.

[0056] The structure after testing is shown in Table 1,

[0057] Table 1

[0058]

[0059] As shown in Table 1 and Figure 13 shown, the overall lifting force of the main wiper arm is 0.261 N, and the pressure distributed to the wiper is 0.42 N / m. The downward pressure of the main wiper arm of the project is designed according to 14 N / m. Therefore, the minimum value of the main wiper arc pressure distribution is 13.58 N / m, which can meet the design requirements.

[0060] The overall lifting force of the secondary wiper arm is 0.07 N, and the pressure distributed to the wiper is 0.16 N / m. The downward pressure of the secondary wiper arm is designed according to 14 N / m. Therefore, the minimum value of the secondary wiper arc pressure distribution is 13.84 N / m, which can meet the design requirements. The specific result shall be subject to the actual vehicle matching.

[0061] The above describes the present invention and its implementation manners. Such description is not restrictive. What is shown throughout the text is only one of the implementation manners of the present invention, and the actual structure is not limited thereto. In summary, if those of ordinary skill in the art are inspired by it and, without departing from the gist of the present invention, design without creativity structural manners and embodiments similar to the technical solution, they shall fall within the protection scope of the present invention.

Claims

1. A windshield wiper structure for reducing wind resistance and lift force, characterized in that It includes a wiper and a wiper arm (1), the wiper is connected to the wiper arm (1), and after the wiper is assembled with the wiper arm (1), it can rotate along the axis of the wiping direction through a rotating shaft hole structure; The wiper arm (1) includes a connecting piece (2) connected to the wiper, and the connecting piece is provided with a pressure-bearing surface; The pressure-bearing surface includes a total windward surface (20) provided on the connecting piece (2) that can reduce the air flow velocity and reduce the lifting force generated by the wind resistance of the wiper on the wiper in the high-speed driving posture of the vehicle; The wiper includes a deflector (5), a spring piece (14) clamped in the deflector (5), a bracket (6) on the spring piece (14), and an accessory (7) on the bracket (6). The accessory (7) is rotatably connected to the bracket (6). The lower end of the deflector (5) is clamped with a wiper blade (8), and buckles (9) are installed on both sides of the deflector (5); The accessory (7) is provided with a first windward surface (10) for blowing air forward to relieve force and offset the wind lifting force. The deflector (5) is provided with a fourth windward surface (11), and the buckle (9) is provided with a fifth windward surface (12); The total windward surface is arranged above the deflector (5) on the spring piece (14) and is also provided with an upper deflector wing (16). The deflector (5) is provided with a lower deflector wing (17) below the spring piece (14) to reduce the wind lifting force, and the extending direction of the lower deflector wing (17) is towards the wiper blade (8).

2. The windshield wiper structure for reducing wind resistance and lift force according to claim 1, characterized in that: One side of the accessory (7) is provided with a protruding ridge (13).

3. The windshield wiper structure for reducing wind resistance and lift force according to claim 1, characterized in that: A notch (15) for exhausting air is formed on one side of the accessory (7).

4. The windshield wiper structure for reducing wind resistance and lift according to claim 3, characterized in that: The upper end of the notch (15) is a V-shaped or U-shaped structure extending inwards.

5. The windshield wiper structure for reducing wind resistance and lift force according to claim 1, characterized in that: The total windward surface (20) includes a second windward surface (3) or a third windward surface (4) or a combination of the second windward surface (3) and the third windward surface (4).

6. The windshield wiper structure for reducing wind resistance and lift force according to claim 5, characterized in that: The inclination angles of the first windward surface (10), the second windward surface (3), and the third windward surface (4) with the rotating shaft are between 20° and 70°.

7. The windshield wiper structure for reducing wind resistance and lift force according to claim 1, characterized in that: The lower deflector wing (17) and the deflector (5) form an included angle a, and the range of the included angle a is 100° to 170°.

8. The windshield wiper structure for reducing wind resistance and lift force according to claim 1, characterized in that: The wiper arm (1) can be an integral type or a multi-segment separated connection structure.

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