Noise reduction windscreen wiper rubber strip

Abstract

The utility model provides a noise reduction windscreen wiper rubber strip which comprises a windscreen wiper rubber strip body and noise reduction arrays arranged on the two sides of the windscreen wiper rubber strip body, and a noise reduction groove comprises a first noise reduction groove outer edge, a second noise reduction groove outer edge, a first noise reduction groove face and a second noise reduction groove face. The outer edge of the first noise reduction groove and the outer edge of the second noise reduction groove are curves protruding forwards and connected end to end to form a closed edge, the included angle between the first noise reduction groove face and the second noise reduction groove face is an acute angle, the first noise reduction groove face and the second noise reduction groove face incline forwards, and the noise reduction array is arranged in a parallel or staggered or reciprocating mode. Due to the fact that the noise reduction array grooves of the special micron-sized structure are formed in the side face of the windscreen wiper rubber strip, the windscreen wiper rubber strip has good water transporting and storing capacity, a uniform water film can be formed on a windscreen in the process of rubbing the windscreen, and the problem of high-frequency noise is effectively solved.

Description

Technical Field

[0001] The utility model relates to the general technical field of vehicles, and in particular to a noise-reducing wiper rubber strip. Background Art

[0002] A windshield wiper is a device placed on the windshield of a motor vehicle during driving, which prevents rain and other dirt from affecting the driver's vision by rubbing back and forth. It is generally composed of a wiper arm, wiper rubber strip, motor, drive rod, etc. The function of the wiper rubber strip is to repeatedly rub against the windshield to remove rain and other dirt.

[0003] At present, wiper rubber strips are prone to high-frequency noise during friction, which is mainly divided into howling and reversing noise. Howling mainly occurs when rainwater is scraped away by wiper rubber strips during friction, and the water film on the friction interface is uneven, and then the rubber material bounces on the windshield. Reversing noise is generated when the wiper rubber strip changes direction during movement. This noise will cause psychological discomfort to the driver, and long-term operation under this noise will affect driving safety.

[0004] Therefore, a windshield wiper strip that can reduce noise is needed. Summary of the invention

[0005] The utility model aims to solve the problem of wiper blade noise and provides a noise-reducing wiper strip. By arranging a noise-reducing array groove with a special micron-level structure on the side of the wiper strip, the wiper strip has a good water transport and storage capacity. During the friction process of the windshield, a uniform water film can be formed on the windshield, effectively solving the problem of high-frequency noise.

[0006] The utility model provides a noise reduction wiper rubber strip, comprising a wiper rubber strip body and noise reduction arrays arranged on both sides of the wiper rubber strip body;

[0007] The wiper rubber strip body comprises a bottom surface, side surfaces connected to both ends of the bottom surface and extending obliquely upward, an upper surface connected to the top of the side surface, and a filling body filled between the bottom surface, the side surface, and the upper surface. The number of the side surfaces is two, and both the bottom surface and the side surface slide on the windshield. The upper surface is detachably fixed in the wiper rubber strip fixing frame.

[0008] The noise reduction array includes at least two noise reduction grooves connected to the side surface and the filling body, the noise reduction grooves extend toward the filling body, and the noise reduction grooves include a first noise reduction groove outer edge connected to the side surface, a second noise reduction groove outer edge, a first noise reduction groove surface connected to the first noise reduction groove outer edge and extending to the filling body, and a second noise reduction groove surface connected to the second noise reduction groove outer edge and extending to the filling body;

[0009] The outer edge of the first noise reduction groove and the outer edge of the second noise reduction groove are both curves protruding forward. The outer edge of the first noise reduction groove and the outer edge of the second noise reduction groove are connected end to end to form a closed edge. The first noise reduction groove surface and the second noise reduction groove surface are both inclined forward, and the angle between the first noise reduction groove surface and the second noise reduction groove surface is an acute angle.

[0010] The noise reduction wiper rubber strip described in the utility model, as a preferred embodiment, has a bottom surface that is an arc surface;

[0011] The length of the outer edge of the first noise reduction groove is greater than the outer edge of the second noise reduction groove, and the slope of the first noise reduction groove surface is less than the slope of the second noise reduction groove surface.

[0012] The noise reduction wiper rubber strip described in the utility model is, as a preferred embodiment, the depth of the noise reduction groove is 1-10 mm, the distance between the middle of the outer edge of the first noise reduction groove and the middle of the outer edge of the second noise reduction groove is 0.5-5 mm, and the width between the outer edge of the first noise reduction groove and the outer edge of the second noise reduction groove is 0.5-5 mm.

[0013] The noise reduction wiper rubber strip described in the utility model is preferably arranged in n rows and m columns on the side surface, and the positions of each row and each column are the same.

[0014] The utility model discloses a noise reduction wiper rubber strip, as a preferred embodiment, the noise reduction grooves are arranged in n rows and m columns on the side surface, and two adjacent rows are staggered or the opening directions of the noise reduction grooves of two adjacent rows are opposite.

[0015] The noise reduction wiper rubber strip described in the utility model is preferably configured such that the material of the wiper rubber strip body is elastic material.

[0016] The noise reduction wiper rubber strip described in the utility model is preferably made of elastic materials including rubber, styrene-based thermoplastic elastomers, polyurethane-based thermoplastic elastomers and polyolefin-based thermoplastic elastomers, and the rubber includes natural rubber, EPDM rubber and nitrile rubber.

[0017] The noise reduction wiper rubber strip described in the utility model is preferably such that the surface contact angle of the noise reduction groove is less than 65°.

[0018] The noise reduction wiper rubber strip described in the utility model is preferably configured such that the wiper rubber strip body and the noise reduction array are hydrophilically modified.

[0019] The noise reduction wiper rubber strip described in the utility model is preferably configured such that the wiper rubber strip body and the noise reduction array are plasma hydrophilized so that the bottom surface and the noise reduction groove are hydrophilized structures.

[0020] The noise reduction grooves extend perpendicularly to the side surface toward the filling body, and the noise reduction arrays are arranged in a parallel, staggered or reciprocating manner.

[0021] When the wiper rubber strip is in use, the bottom surface area is very small and it tilts during movement, causing the side surface to slide on the windshield as well.

[0022] The utility model can reduce the friction noise of the wiper during the movement of the wiper rubber strip. When the car wiper is in motion, water will enter the noise reduction groove from the surface of the noise reduction groove. The liquid can only enter but not exit and moves along the direction of the groove, thus producing the effect of water storage and directional water guidance, which is conducive to forming a uniform water film on the windshield and reducing noise.

[0023] In addition, the main component of the existing wiper strips on the market is hydrophobic material, which can easily cause uneven water film on the windshield during movement. After the hydrophilic modification of the utility model, it is more conducive to forming a uniform water film on the windshield, which is conducive to solving the problem of high-frequency noise.

[0024] The utility model has the following advantages:

[0025] The noise reduction wiper rubber strip prepared by the utility model has noise reduction performance compared with the flat elastic material. During the friction process, it can be observed that the water film is fully spread, and it can remain stable during the friction process without the phenomenon of scraper blade bouncing. It has the functions of noise reduction and long-term stable use. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A three-dimensional schematic diagram of a noise-reducing wiper rubber strip;

[0027] Figure 2 A left view of a noise reduction wiper rubber strip;

[0028] Figure 3 It is a schematic diagram of the partial structure of the side view of embodiments 1 and 2 of a noise reduction wiper rubber strip;

[0029] Figure 4 A schematic diagram of the AA cross-sectional structure of a noise reduction wiper rubber strip;

[0030] Figure 5a It is an existing structural noise amplitude diagram of a noise-reducing wiper rubber strip;

[0031] Figure 5b This is a noise amplitude diagram of a noise reduction wiper rubber strip embodiment 1;

[0032] Figure 5c It is a noise amplitude diagram of a noise reduction wiper rubber strip after hydrophilic modification of the existing structure;

[0033] Figure 5dThis is a noise amplitude diagram of a noise reduction wiper rubber strip embodiment 2;

[0034] Figure 6 A comparison of the base angles of a noise-reducing wiper rubber strip before and after hydrophilic modification;

[0035] Figure 7 It is a schematic diagram of the partial structure of a side view of a noise reduction wiper rubber strip embodiment 3;

[0036] Figure 8 It is a schematic diagram of the partial structure of a side view of a noise reduction wiper rubber strip embodiment 4;

[0037] Fig. 9 It is a schematic diagram of the partial structure of a side view of embodiment 5 of a noise reduction wiper strip.

[0038] Reference numerals:

[0039] 1. Wiper rubber strip body; 11. Bottom surface; 12. Side surface; 13. Upper surface; 14. Filling body; 2. Noise reduction array; 21. Noise reduction groove; 211. Outer edge of the first noise reduction groove; 212. Outer edge of the second noise reduction groove; 213. First noise reduction groove surface; 214. Second noise reduction groove surface. DETAILED DESCRIPTION

[0040] 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 part of the embodiments of the present invention, rather than all of the embodiments.

[0041] Example 1

[0042] like Figure 1 As shown, a noise reduction wiper rubber strip comprises a wiper rubber strip body 1 and a noise reduction array 2 arranged on both sides of the wiper rubber strip body 1;

[0043] like Figure 2 As shown, the wiper rubber strip body 1 comprises a bottom surface 11, side surfaces 12 connected to both ends of the bottom surface 11 and extending obliquely upward, an upper surface 13 connected to the top of the side surface 12, and a filling body 14 filled between the bottom surface 11, the side surface 12, and the upper surface 13. There are two side surfaces 12, and both the bottom surface 11 and the side surface 12 slide on the windshield (that is, the bottom surface 11 and the side surface 12 are both working surfaces of the wiper rubber strip. Since the area of ​​the bottom surface 11 is very small, it tilts during the movement, so that the side surface 12 also slides on the windshield), and the upper surface 13 is detachably fixed in the wiper rubber strip fixing frame;

[0044] like Figures 3-4As shown, the noise reduction array 2 includes at least two noise reduction grooves 21 connected to the side surface 12 and the filling body 14, the noise reduction groove 21 extends toward the filling body 14, and the noise reduction groove 21 includes a first noise reduction groove outer edge 211 connected to the side surface 12, a second noise reduction groove outer edge 212, a first noise reduction groove surface 213 connected to the first noise reduction groove outer edge 211 and extending to the filling body 14, and a second noise reduction groove surface 214 connected to the second noise reduction groove outer edge 212 and extending to the filling body 14;

[0045] The first noise reduction groove outer edge 211 and the second noise reduction groove outer edge 212 are both curves convex forward, the first noise reduction groove outer edge 211 and the second noise reduction groove outer edge 212 are connected end to end to form a closed edge, the first noise reduction groove surface 213 and the second noise reduction groove surface 214 are both inclined forward, and the angle between the first noise reduction groove surface 213 and the second noise reduction groove surface 214 is an acute angle;

[0046] The length of the first noise reduction groove outer edge 211 is greater than the second noise reduction groove outer edge 212, and the slope of the first noise reduction groove surface 213 is less than the slope of the second noise reduction groove surface 214;

[0047] The noise reduction grooves 21 are arranged in n rows and m columns on the side surface 12 and each row and each column has the same position;

[0048] The material of the rubber strip body 1 is an elastic material, and the elastic material includes rubber, styrene-based thermoplastic elastomer, polyurethane-based thermoplastic elastomer and polyolefin-based thermoplastic elastomer, and the rubber includes natural rubber, EPDM rubber and nitrile rubber, etc.;

[0049] The depth of the noise reduction groove 21 is 1-10 mm, the distance between the middle of the first noise reduction groove outer edge 211 and the middle of the second noise reduction groove outer edge 212 is 0.5-5 mm, and the width between the first noise reduction groove outer edge 211 and the second noise reduction groove outer edge 212 is 0.5-5 mm.

[0050] This embodiment uses natural rubber as the material of the wiper rubber strip body 1, and conducts a friction noise test in a water environment. Adobe audition is used to collect noise sound. The experimental results are as follows: Figure 5a The noise amplitude of the wiper strip is the same as that of the present embodiment, without the noise reduction array 2, and the rest of the structure is the same as that of the present embodiment. Figure 5b is the noise amplitude of this embodiment, and the noise reduction effect of this embodiment is obvious.

[0051] Example 2

[0052] A noise reduction wiper rubber strip, the structure of which is the same as that of Example 1. On the basis of Example 1, the wiper rubber strip body 1 and the noise reduction array 2 are hydrophilized, the surface contact angle of the noise reduction groove 21 is less than 65°, and the hydrophilization modification is plasma hydrophilization modification so that the bottom surface 11 and the noise reduction groove 21 are hydrophilized structures;

[0053] The depth of the noise reduction groove 21 is 1-10 mm, the distance between the middle of the first noise reduction groove outer edge 211 and the middle of the second noise reduction groove outer edge 212 is 0.5-5 mm, and the width between the first noise reduction groove outer edge 211 and the second noise reduction groove outer edge 212 is 0.5-5 mm.

[0054] The experimental results are as follows: Figure 5a is the noise amplitude of the wiper blade without the noise reduction array 2 but with the same structure as the present embodiment, Figure 5c The noise amplitude of the wiper blade is not provided with the noise reduction array 2 but the other structures are the same as those of the present embodiment and the wiper blade is hydrophilically modified (the surface contact angle is less than 10°). Figure 5d The noise amplitude of this embodiment (hydrophilic modification was performed, and the surface contact angle is less than 10°) shows that the noise reduction effect of this embodiment is obvious.

[0055] The surface contact angles before and after hydrophilic modification are shown in FIG5 .

[0056] Example 3

[0057] A noise reduction wiper rubber strip, the structure of which is the same as that of embodiment 1, except that the arrangement of the noise reduction grooves 21 is different. Figure 7 As shown, the noise reduction grooves 21 are arranged in n rows and m columns on the side surface 12 and two adjacent rows are staggered.

[0058] Example 4

[0059] A noise reduction wiper rubber strip, the structure of which is the same as that of embodiment 1, except that the arrangement of the noise reduction grooves 21 is different. Figure 8 As shown, the noise reduction grooves 21 are arranged in n rows and m columns on the side surface 12 and the opening directions of the noise reduction grooves 21 in two adjacent rows are opposite.

[0060] Example 5

[0061] A noise reduction wiper rubber strip, the structure of which is the same as that of embodiment 1, except that the arrangement of the noise reduction grooves 21 is different. Fig. 9 As shown, the noise reduction grooves 21 are arranged in n rows and m columns on the side surface 12 , and the opening directions of the noise reduction grooves 21 in two adjacent rows are opposite and the two adjacent rows are staggered.

[0062] The preparation method of Examples 1 to 5 is as follows: first, a reverse template is designed in a drawing software, and a reverse template array is printed using a 3D printer with epoxy resin as a substrate, which takes about 1 to 2 hours. After printing, the reverse template is taken out, and excess impurities are washed off with anhydrous ethanol, and then the impurities are further removed by soaking in anhydrous ethanol and ultrasonic treatment for 5 to 10 minutes, and finally cured by ultraviolet light treatment for 5 to 10 minutes;

[0063] The cured template is subjected to surface activity treatment, and the surface of the template is modified with perfluorodecyltrimethoxysilane, which can effectively maintain the stability of the template and facilitate the demoulding of the rubber material. The specific operation is to take the epoxy resin counter-template and 1-10 ml perfluorodecyltrimethoxysilane and put them in a vacuum drying oven of Shanghai Yiheng Scientific Instrument Co., Ltd. to evacuate, set the temperature to 60°C, and continue for 24 hours;

[0064] The surface modified template is molded, and liquid elastic material is poured. Natural rubber and other materials are heated to 80° C. in a vacuum drying oven of Shanghai Yiheng Scientific Instrument Co., Ltd. for 1 hour. After solidification, the microstructure elastic material can be peeled off to obtain the microstructure elastic material (prepared in Example 1);

[0065] Example 2 also needs to be hydrophilic modified. The specific operation is to use vacuum oxygen plasma treatment, place the bionic microstructure elastic material in a DT-03 low-temperature plasma treatment instrument, set the power to 100-1000w, the time to 0-1000s, turn on the instrument, and reduce the surface contact angle. The contact angle is a parameter that characterizes the hydrophilicity of the interface of an object. The smaller the contact angle, the greater the hydrophilicity. The material is hydrophobic above 65° and hydrophilic below 65°.

[0066] The elastic material may also be polydimethylsiloxane and nitrile rubber.

[0067] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A noise reduction wiper rubber strip, characterized in that: It comprises a wiper rubber strip body (1) and a noise reduction array (2) arranged on both sides of the wiper rubber strip body (1); The wiper rubber strip body (1) comprises a bottom surface (11), side surfaces (12) connected to both ends of the bottom surface (11) and extending obliquely upward, an upper surface (13) connected to the top of the side surface (12), and a filling body (14) filled between the bottom surface (11), the side surface (12), and the upper surface (13), the number of the side surfaces (12) is two, the bottom surface (11) and the side surface (12) both slide on the windshield, and the upper surface (13) is detachably fixed in a wiper rubber strip fixing frame; The noise reduction array (2) comprises at least two noise reduction grooves (21) connected to the side surface (12) and the filling body (14), the noise reduction grooves (21) extending toward the filling body (14), the noise reduction grooves (21) comprising a first noise reduction groove outer edge (211) connected to the side surface (12), a second noise reduction groove outer edge (212), a first noise reduction groove surface (213) connected to the first noise reduction groove outer edge (211) and extending toward the filling body (14), and a second noise reduction groove surface (214) connected to the second noise reduction groove outer edge (212) and extending toward the filling body (14); The outer edge (211) of the first noise reduction groove and the outer edge (212) of the second noise reduction groove are both curves protruding forward, the outer edge (211) of the first noise reduction groove and the outer edge (212) of the second noise reduction groove are connected end to end to form a closed edge, the first noise reduction groove surface (213) and the second noise reduction groove surface (214) are both inclined forward, and the angle between the first noise reduction groove surface (213) and the second noise reduction groove surface (214) is an acute angle.

2. The noise reduction wiper rubber strip according to claim 1, characterized in that: The bottom surface (11) is an arc surface; The length of the first noise reduction groove outer edge (211) is greater than that of the second noise reduction groove outer edge (212), and the slope of the first noise reduction groove surface (213) is less than that of the second noise reduction groove surface (214).

3. The noise reduction wiper rubber strip according to claim 1, characterized in that: The depth of the noise reduction groove (21) is 1 to 10 mm, the distance between the middle of the outer edge (211) of the first noise reduction groove and the middle of the outer edge (212) of the second noise reduction groove is 0.5 to 5 mm, and the width between the outer edge (211) of the first noise reduction groove and the outer edge (212) of the second noise reduction groove is 0.5 to 5 mm.

4. The noise reduction wiper rubber strip according to claim 1, characterized in that: The noise reduction grooves (21) are arranged in n rows and m columns on the side surface (12), and the positions of each row and each column are the same.

5. The noise reduction wiper rubber strip according to claim 1, characterized in that: The noise reduction grooves (21) are arranged in n rows and m columns on the side surface (12), and two adjacent rows are arranged in a staggered manner or the opening directions of the noise reduction grooves (21) in two adjacent rows are opposite.

6. The noise reduction wiper rubber strip according to claim 1, characterized in that: The material of the wiper rubber strip body (1) is elastic material.

7. The noise reduction wiper rubber strip according to claim 6, characterized in that: The elastic material includes rubber, styrene-based thermoplastic elastomer, polyurethane-based thermoplastic elastomer and polyolefin-based thermoplastic elastomer, and the rubber includes natural rubber, EPDM rubber and nitrile butadiene rubber.

8. The noise reduction wiper rubber strip according to claim 1, characterized in that: The surface contact angle of the noise reduction groove (21) is less than 65°.

9. The noise reduction wiper rubber strip according to claim 1, characterized in that: The wiper rubber strip body (1) and the noise reduction array (2) are hydrophilically modified.

10. The noise reduction wiper rubber strip according to claim 9, characterized in that: The wiper rubber strip body (1) and the noise reduction array (2) are subjected to plasma hydrophilization modification so that the bottom surface (11) and the noise reduction groove (21) have a hydrophilic structure.

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