Multi-dimensional noise reduction composite sheet for tire and coiled material

Abstract

The utility model discloses a multi-dimensional noise reduction composite sheet for a tire and a coiled material. The multi-dimensional noise reduction composite sheet for the tire comprises a sound absorption layer, a bonding layer and a release film which are sequentially stacked, the sound absorption layer is provided with a first main body part and two first side parts connected to the two opposite sides of the first main body part, at least two receding grooves are formed in the side, away from the bonding layer, of the sound absorption layer, and the receding grooves are located between the first main body part and one of the first side parts. The receding grooves are recessed in the thickness direction of the sound absorption layer. The noise reduction structure has a good noise reduction effect.

Description

Technical Field

[0001] The utility model relates to the technical field of multi-dimensional noise reduction composite sheets, in particular to a multi-dimensional noise reduction composite sheet for tires and a coil material. Background Art

[0002] In order to reduce vehicle driving noise, silent sponge tires have emerged on the market. The silent sponge tires are that the silent sponge adheres to the inside of the tire, and its porous characteristics have the function of absorbing the resonance between the tire and the road surface. The silent tires can significantly reduce the resonance noise generated when the vehicle is running, reduce the tire noise, and can significantly improve the riding comfort, especially which is of great significance for the noise reduction of new energy vehicles.

[0003] The patent document with the patent publication number of 202320992256.X discloses a low cavity noise tire, which uses a polyurethane material foaming element to make a silent element, and the silent element is a composite sheet, suitable for vacuum tires.

[0004] However, the noise reduction function of the current composite sheet still needs to be improved. Summary of the Utility Model

[0005] In order to overcome the deficiencies of the prior art, one of the purposes of the utility model is to provide a multi-dimensional noise reduction composite sheet for tires, which has a better noise reduction effect.

[0006] Another purpose of the utility model is to provide a coil material for tires, which can not only be used as a multi-dimensional noise reduction composite sheet for new tires, but also be used as a multi-dimensional noise reduction composite sheet for repairing tires.

[0007] One of the purposes of the utility model is realized by adopting the following technical scheme:

[0008] A multi-dimensional noise reduction composite sheet for tires, comprising: a sound absorption layer, an adhesive layer, and a release film which are sequentially stacked; the sound absorption layer has a first main body part and two first side parts connected to opposite sides of the first main body part, at least two avoidance grooves are formed on a side of the sound absorption layer away from the adhesive layer, the avoidance grooves are located between the first main body part and one of the first side parts, and the avoidance grooves are recessed along the thickness direction of the sound absorption layer.

[0009] Further, a side of the first side part close to the adhesive layer is an arc surface structure.

[0010] Further, the thickness of the first side part gradually becomes smaller in the direction away from the first main body part.

[0011] Further, the adhesive layer is a hot melt adhesive layer.

[0012] Further, the hot melt adhesive layer includes a plurality of adhesive strips, which are spaced apart from each other. Some of the adhesive strips are connected to the first main body portion, and some of the adhesive strips are connected to the side of the first side portion away from the first main body portion.

[0013] Further, the sound absorption layer is a polyurethane layer.

[0014] Further, an elastic member is embedded in the sound absorption layer. The body of the elastic member is embedded in the first main body portion, and the opposite sides of the elastic member are respectively placed on one of the first side portions. The elastic member is used to flatten the sound absorption layer.

[0015] Further, the elastic member includes a plurality of elastic strips, which are spaced apart along the length direction of the sound absorption layer.

[0016] Further, the elastic strip is a metal sheet.

[0017] The second object of the present utility model is achieved by adopting the following technical solution:

[0018] A coil material includes the above-mentioned multi-dimensional noise reduction composite sheet for a tire, and the multi-dimensional noise reduction composite sheet is wound along its own length direction to form a coil structure.

[0019] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0020] 1. By designing the multi-dimensional noise reduction composite sheet as a structure in which the sound absorption layer, the adhesive layer, and the release film are sequentially laminated, in a workshop or a repair shop, only the release film needs to be torn off, and then the multi-dimensional noise reduction composite sheet can be adhered to the inner wall of the tire, thereby improving the operation efficiency.

[0021] 2. In addition, by providing an avoidance groove between the first main body portion and the first side portion of the sound absorption layer, the first side portion can be bent relative to the first main body portion, so that the sound absorption layer can be more naturally adhered to the inner wall of the tire, and thus no large internal stress will be generated to affect the adhesion degree of the adhesive layer.

[0022] 3. In addition, based on the avoidance groove providing a compensation space, the adhesion stability between the adhesive layer and the inner wall of the tire can be better ensured.

[0023] 4. On the premise of noise reduction of the first main body portion of the sound absorption layer, the noise reduction of the first side portion for the tire is further increased, thereby further improving the noise reduction effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic structural view of a multi-dimensional noise reduction composite sheet for a tire according to the first embodiment of the present utility model;

[0025] Figure 2Structural schematic diagram of a multi-dimensional noise reduction composite sheet for a tire according to the second embodiment of the present utility model;

[0026] Figure 3 is Figure 2 Effect diagram after the first side part of a multi-dimensional noise reduction composite sheet for a tire shown in the figure is bent relative to the first main body part;

[0027] Figure 4 Cross-sectional effect diagram of an existing tire.

[0028] In the figure: 1, sound-absorbing layer; 11, first main body part; 12, first side part; 13, avoidance groove; 2, adhesive layer; 3, release film; 4, elastic member; 5, tire; 51, second main body part; 52, second side part. Specific implementation manners

[0029] Next, in combination with the drawings and specific implementation manners, the present utility model will be further described. It should be noted that, on the premise of not conflicting, any combination of the following-described embodiments or technical features can form a new embodiment.

[0030] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element. The "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only implementation manner.

[0031] Unless otherwise defined, all technical terms and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present utility model belongs. The terms used in the specification of the present utility model are only for the purpose of describing specific embodiments and are not intended to limit the present utility model. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0032] See Figure 4 , the tire 5 is an existing tubeless tire, having only an outer tire and no inner tire is required to be provided. Its existing noise reduction method is to bond a sound-absorbing layer 1 on the inner wall of the second main body part 51 of the tire 5, while the sound-absorbing layer 1 is not bonded on the second side part 52 of the tire 5.

[0033] First embodiment:

[0034] See Figure 1, a multi - dimensional noise - reducing composite sheet for a tire in the first embodiment of the present utility model includes: a sound - absorbing layer 1, an adhesive layer 2, and a release film 3 which are sequentially stacked. The sound - absorbing layer 1 has a first main body portion 11 and two first side portions 12 connected to opposite sides of the first main body portion 11. At least two avoidance grooves 13 are formed on the side of the sound - absorbing layer 1 away from the adhesive layer 2. The avoidance grooves 13 are located between the first main body portion 11 and one of the first side portions 12. Specifically, the two avoidance grooves 13 are relatively arranged on opposite sides of the first main body portion 11, and the avoidance grooves 13 are recessed along the thickness direction of the sound - absorbing layer 1, that is, the groove depth direction of the avoidance grooves 13 is the direction from the sound - absorbing layer 1 towards the adhesive layer 2.

[0035] During use, the release film 3 is torn off from the adhesive layer 2. Then, the adhesive layer 2 is attached to the inner wall of the tire 5 so that the first main body portion 11 is disposed opposite to and attached to the second main body portion 51, and the first side portion 12 is disposed opposite to and attached to the second side portion 52. Since the avoidance grooves 13 provide a bending compensation and avoidance space between the first main body portion 11 and the first side portion 12, the first side portion 12 can be bent more naturally relative to the first main body, and thus can be placed inside the tire 5 and be in profile - matching cooperation with the second side portion 52 of the tire 5, so as to better ensure the bonding stability between the adhesive layer 2 and the inner wall of the tire 5. In this way, both the second main body portion 51 and the second side portion 52 of the tire 5 achieve noise reduction, that is, the tire 5 realizes the multi - dimensional noise - reducing function.

[0036] Obviously, by designing the multi - dimensional noise - reducing composite sheet as a sequential stack of the sound - absorbing layer 1, the adhesive layer 2, and the release film 3, workshops or repair shops only need to tear off the release film 3 and then can attach the multi - dimensional noise - reducing composite sheet to the inner wall of the tire 5, thereby improving the operation efficiency. In addition, by providing the avoidance grooves 13 between the first main body portion 11 and the first side portion 12 of the sound - absorbing layer 1, the first side portion 12 can be bent relative to the first main body portion 11, so that the sound - absorbing layer 1 can be more naturally attached to the inner wall of the tire 5, and thus no large internal stress will be generated to affect the adhesion of the adhesive layer 2. In addition, based on the compensation space provided by the avoidance grooves 13, the bonding stability between the adhesive layer 2 and the inner wall of the tire 5 can be better ensured. In this way, on the premise of noise reduction of the first main body portion 11 of the sound - absorbing layer 1, the first side portion 12 further increases the noise reduction for the tire, thereby further improving the noise - reducing effect.

[0037] In this embodiment, in order to improve the contact tightness between the first side portion 12 and the inner wall of the tire 5 to further improve the noise - reducing effect, preferably, the side of the first side portion 12 close to the adhesive layer 2 has an arc - surface structure. It can be understood that there is generally an arc - surface transition between the inner wall of the second main body portion 51 and the inner wall of the second side wall of the tire 5. By contacting the inner wall of the tire 5 with the arc - surface structure, the profile - matching effect is better.

[0038] In this embodiment, preferably, the thickness of the first side portion 12 gradually decreases in the direction away from the first main body portion 11. Such a setting is mainly considered that the first side portion 12 is attached to the second side portion 52 of the tire 5, and the second side portion 52 of the tire 5 is easily squeezed by the curb. By making the thickness of the first side portion 12 gradually decrease in the direction away from the first main body portion 11, the connection stability between the first side portion 12 and the second side portion 52 of the tire 5 is improved, and the stability against deformation is also better, thereby preventing the first side portion 12 of the sound absorption layer 1 from detaching from the second side portion 52 of the tire 5.

[0039] In this embodiment, the adhesive layer 2 can be acrylic glue or double-sided tape. In this embodiment, it is preferably a hot melt adhesive layer, and the bonding stability of the hot melt adhesive layer is better.

[0040] In other embodiments, preferably, the hot melt adhesive layer includes multiple adhesive strips, and the multiple adhesive strips are distributed at intervals. Some adhesive strips are connected to the first main body portion 11, and some adhesive strips are connected to the side of the first side portion 12 away from the first main body portion 11. With such a setting, the middle part of the first side portion 12 and the second side portion 52 of the tire 5 do not need to be bonded together, thus forming a deformation compensation space between them. When the second side portion 52 of the tire 5 is squeezed by the curb and pressed inward, since the middle part of the first side portion 12 is not adhered to the second side portion 52, but the two sides of the first side portion 12 are adhered to the second side portion 52, the first side portion 12 will not be pulled, thereby improving the bonding stability between the first side portion 12 and the inner wall of the tire 5. In this embodiment, the hot melt adhesive layer is a layered structure and is an integral structure covering the back surface of the sound absorption layer 1.

[0041] In this embodiment, the sound absorption layer 1 is preferably a polyurethane layer.

[0042] The present utility model also discloses a coil material, including the multi-dimensional noise reduction composite sheet for a tire as described above, and the multi-dimensional noise reduction composite sheet is wound along its own length direction to form a coil structure. When the workshop consumes the coil material, the coil material with the same length can be intercepted according to the inner wall circumference of the tire 5. When the repair shop locally repairs the sound absorption layer 1, after taking out the damaged section of the sound absorption layer 1, a coil material section with an equal length can be cut and patched in according to the length of the section.

[0043] Second embodiment:

[0044] See Figure 2 and Figure 3, the present utility model also discloses a second embodiment, which is different from the first embodiment in that: an elastic member 4 is embedded in the sound-absorbing layer 1, the body of the elastic member 4 is embedded in the first main part 11, and the opposite sides of the elastic member 4 are respectively placed on one of the first side parts 12. The elastic member 4 is used to drive the sound-absorbing layer 1 to flatten. With this setting, the elastic member 4 has the function of forcing the sound-absorbing layer 1 to closely adhere to the inner wall of the tire 5, thereby improving the connection stability between the sound-absorbing layer 1 and the inner wall of the tire 5. In particular, when the tire 5 comes into contact with the curb, the extrusion force is absorbed by the elastic member 4, thereby reducing the pulling force on the adhesive layer 2 and increasing the service life of the adhesive layer 2.

[0045] Preferably, the elastic member 4 includes a plurality of elastic strips, and the plurality of elastic strips are spaced apart along the length direction of the sound-absorbing layer 1. With this setting, each elastic strip acts independently, thereby avoiding local deformation of the entire elastic member 4 and reducing the service life of the elastic member 4. That is to say, in other embodiments, the elastic member 4 can be a sheet-like structure.

[0046] In this embodiment, preferably, the elastic strip is a metal sheet. The advantage of this setting is that the elastic strip has the long-term effect of automatically returning to its original shape. It can be understood that in other embodiments, the elastic strip can be made of a rubber strip.

[0047] The above embodiments are only the preferred embodiments of the present utility model, and the scope of protection of the present utility model cannot be limited thereby. Any non-substantial changes and substitutions made by those skilled in the art based on the present utility model fall within the scope of protection required by the present utility model.

Claims

1. A multi-dimensional noise reduction composite sheet for a tire, characterized in that, Comprising: A sound-absorbing layer, an adhesive layer, and a release film stacked in sequence; The sound-absorbing layer has a first main body portion and two first side portions connected to opposite sides of the first main body portion. At least two avoidance grooves are formed on a side of the sound-absorbing layer away from the adhesive layer. The avoidance grooves are located between the first main body portion and one of the first side portions, and the avoidance grooves are recessed along the thickness direction of the sound-absorbing layer.

2. The multi-dimensional noise reduction composite sheet for a tire according to claim 1, wherein A side of the first side portion close to the adhesive layer has an arc-shaped structure.

3. The multi-dimensional noise reduction composite sheet for a tire according to claim 1, wherein, The thickness of the first side portion gradually decreases in a direction away from the first main body portion.

4. The multi-dimensional noise reduction composite sheet for a tire according to claim 1, wherein, The adhesive layer is a hot-melt adhesive layer.

5. The multi-dimensional noise reduction composite sheet for a tire according to claim 4, characterized in that, The hot-melt adhesive layer includes multiple adhesive strips, and the multiple adhesive strips are distributed at intervals. Some of the adhesive strips are connected to the first main body portion, and some of the adhesive strips are connected to a side of the first side portion away from the first main body portion.

6. The multi-dimensional noise reduction composite sheet for a tire according to claim 1, wherein, The sound-absorbing layer is a polyurethane layer.

7. The multi-dimensional noise reduction composite sheet for a tire according to claim 1, wherein An elastic member is embedded in the sound-absorbing layer. The body of the elastic member is embedded in the first main body portion, and opposite sides of the elastic member are respectively placed on one of the first side portions. The elastic member is used to drive the sound-absorbing layer to flatten.

8. The multi-dimensional noise reduction composite sheet for a tire according to claim 7, wherein The elastic member includes multiple elastic strips, and the multiple elastic strips are distributed at intervals along the length direction of the sound-absorbing layer.

9. The multi-dimensional noise reduction composite sheet for a tire according to claim 8, wherein, The elastic strip is a metal sheet.

10. A coil material, characterized in that, A multi-dimensional noise reduction composite sheet for a tire according to any one of claims 1-9, wherein the multi-dimensional noise reduction composite sheet is wound along its own length direction to form a coil structure.

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