Tire noise reduction cotton
By installing sound-absorbing cotton inside the tire cavity, the sound wave energy is absorbed and converted into heat energy, solving the problem of tire noise in electric vehicles and providing a noise reduction solution that is simple in structure, easy to install, and low in cost.
Patent Information
- Application Number
- CN202520410440.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-28
- Publication Date
- 2026-01-13
- Estimated Expiration
- 2035-02-28
AI Technical Summary
The problem of tire noise in electric vehicles has become prominent. Existing noise reduction methods are not very effective in electric vehicles, and there is a need for an effective noise reduction solution that is simple in structure, easy to install, and low in cost.
Sound-absorbing cotton is installed inside the tire cavity to absorb sound wave energy and convert it into heat energy to reduce noise. The sound-absorbing cotton can be pasted on the surface of the tire or rim and fixed with adhesive layers and release layers, and further secured with straps.
It effectively reduces tire noise, has a simple structure, is easy to install, and is low in cost, making it suitable for the noise reduction needs of electric vehicles.
Smart Images
Figure CN223791265U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a tire noise-absorbing cotton, characterized in that the noise-absorbing cotton is assembled on the inner surface of the tire crown or on the outer surface of the wheel rim. The noise-absorbing cotton is located in the cavity formed by the tire and the wheel rim. During vehicle operation, the interaction between the tire and the ground, as well as the deformation of the tire, generate noise. The sound waves resonate in the cavity inside the tire, and the noise energy is superimposed, making the noise amplified. The noise-absorbing cotton absorbs the sound wave energy in the inner cavity of the tire and converts the sound wave energy into heat energy, thereby achieving the effect of noise reduction. The tire noise-absorbing cotton of this utility model has a simple structure, is easy to install, has low cost, and has a good noise reduction effect. Background Technology
[0002] Tire noise is a common problem during vehicle operation. The causes and mechanisms of tire noise are quite complex. Although there are many factors that generate noise excitation sources, all tire noise originates from the contact between the tire and the road, tire deformation, and the interaction between the tire and the air. Using soft materials and quiet tread patterns in tire design can effectively reduce tire noise. With the gradual popularization of new energy electric vehicles, a new phenomenon has emerged. Since the vehicle is driven by an electric motor, the background noise is much lower than that of a gasoline engine, making the tire noise problem of electric vehicles more prominent. A good way to solve the tire noise problem of electric vehicles is to use sound-absorbing cotton inside the tires to reduce noise.
[0003] Purpose and advantages of the utility model
[0004] This utility model relates to a tire noise-absorbing cotton, characterized in that the noise-absorbing cotton is assembled on the inner surface of the tire crown or on the outer surface of the wheel rim. The noise-absorbing cotton is located in the cavity formed by the tire and the wheel rim. During vehicle operation, the interaction between the tire and the ground, as well as the deformation of the tire, generate noise. The sound waves resonate in the cavity inside the tire, and the noise energy is superimposed, making the noise amplified. The noise-absorbing cotton absorbs the sound wave energy in the inner cavity of the tire and converts the sound wave energy into heat energy, thereby achieving the effect of noise reduction. The tire noise-absorbing cotton of this utility model has a simple structure, is easy to install, has low cost, and has a good noise reduction effect. Utility Model Content
[0005] This utility model relates to tire sound-absorbing cotton (see...) Figure 1 The sound-absorbing cotton (3) is long and narrow. One side of the sound-absorbing cotton (3) has an adhesive layer (8) and a release layer (9). The release layer (9) is peeled off, and the adhesive layer (8) is pasted on the inner surface of the tire crown to fix the sound-absorbing cotton (3) to the inner surface of the tire crown, or the adhesive layer (8) is pasted on the outer surface of the wheel hub (1) to fix the sound-absorbing cotton (3) to the outer surface of the wheel hub (1) (see Figure 2) The glue layer (8) and the release layer (9) have the same surface shape and size as the sound-absorbing cotton (3). The length of the sound-absorbing cotton (3) is equal to the circumference of the inner surface of the tire crown or the circumference of the outer surface of the wheel hub (1). The sound-absorbing cotton (3) is located in the cavity (5) formed by the tire (2) and the wheel hub (1) to absorb sound wave energy and convert the sound wave energy into heat energy, thereby achieving the purpose of noise reduction.
[0006] The second assembly method of the sound-absorbing cotton (3) is (see Figure 3 、 Figure 4 ). A plurality of narrow adhesive sheets (13) are evenly distributed on the inner surface (10) of the sound-absorbing cotton (3) (see Figure 6 ). The length of the narrow adhesive sheet (13) is the same as the width of the sound-absorbing cotton (3), and the width of the narrow adhesive sheet (13) is less than the length of the sound-absorbing cotton (3). The rest of the inner surface (10) of the sound-absorbing cotton (3) is blank without glue. The narrow adhesive sheet (13) is composed of a glue layer (8) and a release layer (9). After tearing off the release layer (9), the sound-absorbing cotton (3) is wrapped around the outer surface of the wheel hub (1), and the glue layer (8) is pasted on the outer surface of the wheel hub (1) to fix the sound-absorbing cotton (3). A binding band (4) is wrapped outside the sound-absorbing cotton (3) to secondarily fix the sound-absorbing cotton (3). The binding band (4) is a sheet structure with a certain width (see Figure 7 ) and can be bent. Its width is less than or equal to the width of the sound-absorbing cotton (3). There is a wide adhesive sheet (14) on the surface of the end of the binding band (4). The length of the wide adhesive sheet (14) is equal to the width of the sound-absorbing cotton (3), and the width of the wide adhesive sheet (14) is equal to the width of the overlapping area (7). A plurality of narrow adhesive sheets (13) are evenly distributed on the rest of the binding band (4). The narrow adhesive sheet (13) and the wide adhesive sheet (14) are composed of a glue layer (8) and a release layer (9). After tearing off the release layer (9), the binding band (4) is pasted on the outer surface (11) of the sound-absorbing cotton (3). The binding band (4) is tightened, and the wide adhesive sheet (14) and the overlapping area (7) are butted and firmly pasted through the glue layer (8). The binding band (4) firmly fixes the sound-absorbing cotton (3) on the outer surface of the wheel hub (1).
[0007] The first structure of the sound-absorbing cotton (3) is a honeycomb structure (see Figure 8 、 Figure 9 ). The sound-absorbing cotton (3) is a long strip shape with a certain thickness and is composed of a body (15) and a plurality of hemispherical pits (16). A plurality of hemispherical pits (16) are arranged in a "pin" shape on one side surface of the body (15), and the depth of the hemispherical pits (16) is less than the thickness of the body (15).
[0008] The second structure of the sound-absorbing cotton (3) is a positive sine curve corrugated structure (see Figure 10The sound-absorbing cotton (3) is a long strip with a certain thickness. It consists of a body (15) and a corrugated groove (17). Multiple corrugated grooves (17) are evenly arranged on one side surface of the body (15). The cross section of the corrugated groove (17) is a sinusoidal curve shape. The depth of the corrugated groove (17) is less than the thickness of the body (15).
[0009] The third structure of sound-absorbing cotton (3) is a rectangular groove structure (see Figure 11 The sound-absorbing cotton (3) is a long strip with a certain thickness. It consists of a body (15) and a rectangular groove (18). Multiple rectangular grooves (18) are evenly arranged on one side surface of the body (15). The cross-section of the rectangular groove (18) is rectangular, and the depth of the rectangular groove (18) is less than the thickness of the body (15).
[0010] The fourth structure of sound-absorbing cotton (3) is a triangular groove structure (see Figure 12 The sound-absorbing cotton (3) is a long strip with a certain thickness, consisting of a body (15) and a triangular groove (19). Multiple triangular grooves (19) are evenly arranged on one side surface of the body (15). The cross-section of the triangular groove (19) is triangular, and the depth of the triangular groove (19) is less than the thickness of the body (15).
[0011] The fifth structure of sound-absorbing cotton (3) is a trapezoidal groove structure (see Figure 13 The sound-absorbing cotton (3) is a long strip with a certain thickness. It consists of a body (15) and a trapezoidal groove (20). Multiple trapezoidal grooves (20) are evenly arranged on one side surface of the body (15). The cross-section of the trapezoidal groove (20) is trapezoidal, and the depth of the trapezoidal groove (20) is less than the thickness of the body (15).
[0012] The sixth structure of sound-absorbing cotton (3) is a rectangular structure (see Figure 14 The sound-absorbing cotton (3) is a long strip with a certain thickness. The upper surface is a plane (21), and the pit or groove structure is eliminated. The plane (21) is parallel to the lower surface of the body (15). Attached Figure Description
[0013] Figure 1 This is a 3D diagram of the tire noise reduction cotton assembly, showing the installation position of the noise reduction cotton (3) in the wheel hub (1) and tire (2). The tire noise reduction cotton assembly consists of the wheel hub (1), tire (2) and noise reduction cotton (3). The noise reduction cotton (3) is pasted on the inner surface of the tire (2) or on the outer surface of the wheel hub (1).
[0014] Figure 2 This is the first structure in which sound-absorbing cotton (3) is assembled on the wheel hub (1). The surface of one side of the sound-absorbing cotton (3) has an adhesive layer (8) and a peeling layer (9). The peeling layer (9) is torn off, and the adhesive layer (8) is pasted on the outer surface of the wheel hub (1).
[0015] Figure 3 This is the second structure for assembling the sound-absorbing cotton (3) on the hub (1). One side surface of the sound-absorbing cotton (3) has a narrow adhesive sheet (13). The sound-absorbing cotton (3) is pasted on the outer surface of the hub (1), and the outer side of the sound-absorbing cotton (3) is covered with a binding strap (4). The ends of the binding strap (4) are overlapped and pasted together to hoop the sound-absorbing cotton (3).
[0016] Figure 4 This is the second structure for assembling the sound-absorbing cotton (3) on the hub (1), showing the structural details of the sound-absorbing cotton (3) and the binding strap (4). The inner surface of the sound-absorbing cotton (3) has a narrow adhesive sheet (13), and the narrow adhesive sheet (13) is pasted on the outer surface of the hub (1) to prevent the sound-absorbing cotton (3) from moving.
[0017] Figure 5 This is the assembly structure diagram of the sound-absorbing cotton (3), which is the first structure of the sound-absorbing cotton (3) assembly. One side surface of the sound-absorbing cotton (3) has an adhesive layer (8) and a release layer (9). The adhesive layer (8) is coated on the sound-absorbing cotton (3), and the release layer (9) is pasted outside the adhesive layer (8). After tearing off the release layer (9), the adhesive layer (8) is exposed, and the sound-absorbing cotton (3) can be pasted on the hub (1) or on the tire (2).
[0018] Figure 6 This is the assembly structure diagram of the sound-absorbing cotton (3), which is the second structure of the sound-absorbing cotton (3) assembly. One side surface of the sound-absorbing cotton (3) has multiple narrow adhesive sheets (13). A-A is the cross-sectional view of the narrow adhesive sheet (13), and the narrow adhesive sheet (13) is composed of an adhesive layer (8) and a release layer (9).
[0019] Figure 7 This is the structure diagram of the binding strap (4). One side surface of the binding strap (4) has multiple narrow adhesive sheets (13). One side of the binding strap (4) has a wide adhesive sheet (14). The other end of the binding strap (4) is a lap joint area (7). B-B is the cross-sectional view of the narrow adhesive sheet (13), and the narrow adhesive sheet (13) is composed of an adhesive layer (8) and a release layer (9).
[0020] Figure 8 This is the 3D view of the first structure of the sound-absorbing cotton (3), which is a honeycomb structure, composed of a body (15) and hemispherical pits (16). Multiple hemispherical pits (16) are arranged in a "pin" shape on one side surface of the body (15), and the depth of the hemispherical pits (16) is less than the thickness of the body (15).
[0021] Figure 9 This is the top view of the first structure of the sound-absorbing cotton (3), showing the layout of the hemispherical pits (16). Multiple hemispherical pits (16) are arranged in a "pin" shape on one side surface of the body (15).
[0022] Figure 10 The second structure of the sound-absorbing cotton (3) is a sine curve corrugated structure. The sound-absorbing cotton (3) consists of a body (15) and a corrugated groove (17). The cross section of the corrugated groove (17) is a sine curve shape.
[0023] Figure 11 The third structure of the sound-absorbing cotton (3) is a rectangular groove structure. The sound-absorbing cotton (3) consists of a body (15) and a rectangular groove (18). The cross-section of the rectangular groove (18) is rectangular.
[0024] Figure 12 It is the fourth type of sound-absorbing cotton (3), which is a triangular groove structure. The sound-absorbing cotton (3) consists of a body (15) and a triangular groove (19). The cross section of the triangular groove (19) is triangular.
[0025] Figure 13 It is the fifth structure of the sound-absorbing cotton (3), which is a trapezoidal groove structure. The sound-absorbing cotton (3) consists of a body (15) and a trapezoidal groove (20). The cross section of the trapezoidal groove (20) is trapezoidal.
[0026] Figure 14 It is the sixth structure of the sound-absorbing cotton (3), which is a planar structure. The upper surface of the sound-absorbing cotton (3) is a plane (21), eliminating the pit or groove structure. The plane (21) is parallel to the lower surface of the body (15). Detailed Implementation
[0027] Method 1 for installing sound-absorbing cotton: The sound-absorbing cotton is pasted onto the inner surface of the tire crown. This is the first installation position for the sound-absorbing cotton. First, select sound-absorbing cotton that matches the tire. The length of the sound-absorbing cotton should be equal to or slightly smaller than the circumference of the inner surface of the tire crown. Clean the inner surface of the tire crown first, then tear off a corner of the peeling layer at one end of the sound-absorbing cotton to expose a small section of the adhesive layer. Paste the adhesive layer onto the inner surface of the tire crown, aligning the center line of the sound-absorbing cotton with the center line of the tire crown. Press a small section of the adhesive layer to make it adhere firmly to the tire crown. Then, along the direction of the inner wall of the tire crown, continue to tear off and remove the peeling layer sandwiched between the tire crown and the adhesive layer. After the peeling layer is removed bit by bit, continue to press the sound-absorbing cotton to paste it onto the tire crown section by section until all the peeling layer is removed. The entire strip of sound-absorbing cotton is now pasted onto the inner wall of the tire crown. During the pasting process, avoid creating defects such as wrinkles, air bubbles, and loose connections.
[0028] Method 2 for installing sound-absorbing cotton: The sound-absorbing cotton is pasted onto the outer surface of the wheel hub. This is the second installation position for the sound-absorbing cotton, which is basically the same as the first method. First, draw the boundary line on the wheel hub, measure the width of the wheel hub and the sound-absorbing cotton, place the sound-absorbing cotton in the center of the wheel hub, and mark the position of the two sides of the sound-absorbing cotton with a paint pen. Then, according to the marked position, draw one or two marked circles on the wheel hub. When pasting the sound-absorbing cotton, make sure that the sound-absorbing cotton is completely within the marked circles.
[0029] Method 3 for installing sound-absorbing cotton: The sound-absorbing cotton is tied to the outer surface of the wheel hub. This is the second installation position for the sound-absorbing cotton. First, draw a marked circle as described in the method. Then, peel off the peeling layer on the multiple narrow adhesive strips. Within the marked circle, stick the sound-absorbing cotton to the outer surface of the wheel hub. Then, peel off the peeling layer on the narrow adhesive strip on the strap and wrap the strap around the outside of the sound-absorbing cotton, aligning the center line of the strap with the center line of the sound-absorbing cotton. Then, peel off the peeling layer on the wide adhesive strip and tighten the strap to make the wide adhesive strip overlap the overlapping area and stick firmly. The strap will hold the sound-absorbing cotton to the outer surface of the wheel hub.
Claims
1. A tire silencing cotton characterized by The sound-absorbing cotton (3) is in a long strip shape. There is an adhesive layer (8) and a release layer (9) on one surface of the sound-absorbing cotton (3). The sound-absorbing cotton (3) is fixed on the inner surface of the tire crown of the tire (2), or the sound-absorbing cotton (3) is fixed on the outer surface of the wheel hub (1). The adhesive layer (8) and the release layer (9) have the same surface shape and size as the sound-absorbing cotton (3). The length of the sound-absorbing cotton (3) is equal to the circumference of the inner surface of the tire crown, or equal to the circumference of the outer surface of the wheel hub (1).
2. A tire silencing cotton according to claim 1, characterized in that The second assembly method of the sound-absorbing cotton (3): A plurality of narrow adhesive sheets (13) are evenly distributed on the inner surface (10) of the sound-absorbing cotton (3). The length of the narrow adhesive sheet (13) is the same as the width of the sound-absorbing cotton (3), and the width of the narrow adhesive sheet (13) is less than the length of the sound-absorbing cotton (3). The rest of the inner surface (10) of the sound-absorbing cotton (3) is blank. The narrow adhesive sheet (13) is composed of an adhesive layer (8) and a release layer (9). The sound-absorbing cotton (3) is wrapped around the outer surface of the wheel hub (1). The adhesive layer (8) is pasted on the outer surface of the wheel hub (1). A binding band (4) is wrapped around the outside of the sound-absorbing cotton (3). The binding band (4) is a sheet structure with a certain width, and the width is less than or equal to the width of the sound-absorbing cotton (3). There is a wide adhesive sheet (14) on the surface of the end of the binding band (4). The length of the wide adhesive sheet (14) is equal to the width of the sound-absorbing cotton (3), and the width of the wide adhesive sheet (14) is equal to the width of the overlapping area (7). A plurality of narrow adhesive sheets (13) are evenly distributed on the rest of the binding band (4). The narrow adhesive sheet (13) and the wide adhesive sheet (14) are composed of an adhesive layer (8) and a release layer (9). The binding band (4) is pasted on the outer surface (11) of the sound-absorbing cotton (3). The wide adhesive sheet (14) and the overlapping area (7) are butted and firmly pasted through the adhesive layer (8). The binding band (4) fixes the sound-absorbing cotton (3) on the outer surface of the wheel hub (1).
3. A tire silencing cotton according to claim 1, characterized in that The first structure of the sound-absorbing cotton (3) is a honeycomb structure. The sound-absorbing cotton (3) is in a long strip shape with a certain thickness, and is composed of a body (15) and a plurality of hemispherical pits (16). A plurality of hemispherical pits (16) are arranged in a "pin" shape on one surface of the body (15). The depth of the hemispherical pits (16) is less than the thickness of the body (15).
4. A tire silencing cotton according to claim 1, characterized in that The second structure of the sound-absorbing cotton (3) is a positive sine curve corrugated structure. The sound-absorbing cotton (3) is in a long strip shape with a certain thickness, and is composed of a body (15) and corrugated grooves (17). A plurality of corrugated grooves (17) are evenly arranged on one surface of the body (15). The cross-section of the corrugated grooves (17) is in the shape of a sine curve, and the depth of the corrugated grooves (17) is less than the thickness of the body (15).
5. A tire silencing cotton according to claim 1, characterized in that The third structure of the sound-absorbing cotton (3) is a rectangular groove structure. The sound-absorbing cotton (3) is in a long strip shape with a certain thickness, and is composed of a body (15) and rectangular grooves (18). A plurality of rectangular grooves (18) are evenly arranged on one surface of the body (15). The cross-section of the rectangular grooves (18) is rectangular, and the depth of the rectangular grooves (18) is less than the thickness of the body (15).
6. A tire silencing cotton according to claim 1, characterized in that The fourth structure of the sound-absorbing cotton (3) is a triangular groove type structure. The sound-absorbing cotton (3) is a long strip with a certain thickness, which is composed of a body (15) and triangular grooves (19). A plurality of triangular grooves (19) are uniformly arranged on one side surface of the body (15). The cross section of the triangular groove (19) is triangular, and the depth of the triangular groove (19) is less than the thickness of the body (15).
7. A tire silencing cotton according to claim 1, characterized in that The fifth structure of the sound-absorbing cotton (3) is a trapezoidal groove type structure. The sound-absorbing cotton (3) is a long strip with a certain thickness, which is composed of a body (15) and trapezoidal grooves (20). A plurality of trapezoidal grooves (20) are uniformly arranged on one side surface of the body (15). The cross section of the trapezoidal groove (20) is trapezoidal, and the depth of the trapezoidal groove (20) is less than the thickness of the body (15).
8. A tire silencing cotton according to claim 1, characterized in that The sixth structure of the sound-absorbing cotton (3) is a rectangular type structure. The sound-absorbing cotton (3) is a long strip with a certain thickness, and the upper surface is a plane (21) parallel to the lower surface of the body (15).