CN118024789A - Sound insulation pad attached to inner wall of tire, mute tire and assembly method - Google Patents
Sound insulation pad attached to inner wall of tire, mute tire and assembly method Download PDFInfo
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- CN118024789A CN118024789A CN202410445615.9A CN202410445615A CN118024789A CN 118024789 A CN118024789 A CN 118024789A CN 202410445615 A CN202410445615 A CN 202410445615A CN 118024789 A CN118024789 A CN 118024789A
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- pad
- sound insulation
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- 238000009413 insulation Methods 0.000 title claims abstract description 69
- 238000000034 method Methods 0.000 title claims abstract description 17
- 230000009467 reduction Effects 0.000 claims abstract description 66
- 229920000742 Cotton Polymers 0.000 claims abstract description 50
- 238000010521 absorption reaction Methods 0.000 claims abstract description 44
- 230000002829 reductive effect Effects 0.000 claims abstract description 24
- 239000003365 glass fiber Substances 0.000 claims abstract description 12
- 239000010410 layer Substances 0.000 claims description 41
- 230000030279 gene silencing Effects 0.000 claims description 37
- 229920001971 elastomer Polymers 0.000 claims description 29
- 239000000565 sealant Substances 0.000 claims description 14
- 229920001821 foam rubber Polymers 0.000 claims description 10
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 239000012945 sealing adhesive Substances 0.000 claims description 7
- 239000011324 bead Substances 0.000 claims description 4
- 238000001035 drying Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 17
- 239000006260 foam Substances 0.000 description 16
- 230000008569 process Effects 0.000 description 6
- 230000008859 change Effects 0.000 description 5
- 230000006835 compression Effects 0.000 description 5
- 238000007906 compression Methods 0.000 description 5
- 238000005096 rolling process Methods 0.000 description 5
- 239000003292 glue Substances 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 230000001743 silencing effect Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 230000002776 aggregation Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 230000036961 partial effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C19/00—Tyre parts or constructions not otherwise provided for
- B60C19/002—Noise damping elements provided in the tyre structure or attached thereto, e.g. in the tyre interior
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D30/00—Producing pneumatic or solid tyres or parts thereof
- B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
- B29D30/0681—Parts of pneumatic tyres; accessories, auxiliary operations
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Tires In General (AREA)
Abstract
The invention relates to the technical field of silent tires, and discloses a sound insulation pad, a silent tire and an assembly method, wherein the sound insulation pad is adhered to the inner wall of the tire, a first sound absorption cotton pad integrally formed with a glass fiber layer is arranged on one side, far away from an opening, of a sound insulation cavity, the silent tire comprises a sound insulation pad and a tire body, vibration noise can be gradually absorbed after being reflected in the sound insulation cavity through the correspondence of the first sound absorption cotton pad, the second sound absorption cotton pad and the sound insulation cavity, the noise reduction effect is greatly improved, the first sound-absorbing cotton pad and the second sound-absorbing cotton pad can reduce the noise of the tire in a wider frequency range when vibrating, meanwhile, the noise of the air flow inside the tire is reduced by the buffer area in a wave crest state and the valley-peak cooperation of the wave trough, the vibration noise and the air flow noise when the tire rolls are reduced and absorbed through the combination of the internal and external noise reduction modes of the sound-insulating pad body, and the conductivity of the noise is greatly reduced.
Description
Technical Field
The invention relates to the technical field of silent tires, in particular to a sound insulation pad attached to the inner wall of a tire, a silent tire and an assembly method.
Background
In order to reduce the tire noise, a layer of mute sponge is stuck to the inner side wall of the tire, and in general, one side of the mute sponge strip facing the inner wall of the tire is flatly stuck to the inner side wall of the tire through glue solution, and the tire stuck with the mute sponge is also commonly called a mute tire.
In the mute tire with the application number of CN202321553776.7, a plurality of protruding parts are correspondingly arranged with a plurality of grooves, the protruding parts are in butt joint with the end parts of a plurality of self-repairing filling parts, a cavity is formed between two adjacent protruding parts and an inner liner layer, the mute tire adheres to a mute piece by utilizing a self-repairing layer, and the self-repairing layer still has a good self-repairing effect in the using process of the tire.
However, when in actual use, noise is reduced through the sound insulation pad with the porous design, a certain effect can be achieved, however, the inner hole aperture of the porous sound absorption material is single, the noise reduction frequency band is narrow, the noise reduction effect is weak, compared with the existing cuboid noise reduction piece which is integrally attached, the specific surface area of the noise reduction piece is only increased, the contact surface between the noise reduction piece and the inner cavity of the tire is increased, and accordingly the cavity vibration energy is absorbed in a simple coverage area increasing mode, the mode is single, the noise reduction treatment of the tire under different rotation states cannot be adapted, high-frequency noise under high-speed rotation of the tire still cannot be effectively treated, and then the noise reduction effect of the tire in actual use is poor.
Therefore, it is necessary to solve the above problems by a sound insulation pad attached to the inner wall of a tire, a silent tire, and an assembling method.
Disclosure of Invention
The invention aims to provide a sound insulation pad attached to the inner wall of a tire, a mute tire and an assembly method thereof, so as to solve the problems in the prior art.
In order to achieve the above purpose, the present invention provides the following technical solutions: the utility model provides a paste and locate sound insulation pad of tire inner wall, includes the sound insulation pad body, the sound insulation pad body includes the glass fiber layer, the lateral wall on glass fiber layer evenly is provided with the amortization cavity along the circumferencial direction, the one side that keeps away from the opening in the amortization cavity is provided with the first cotton pad that inhales that sets up with glass fiber layer integrated into one piece, first cotton pad that inhales and the cotton pad that inhales of second are crisscross to be set up and integrated into one piece, the amortization cavity is the cavity that encloses between the cotton pad that inhales and the tire inner wall through two sets of adjacent second and the first cotton pad that inhales in centre, the arc wall has been seted up on the lateral wall that inhales the cotton pad to the second;
The sound attenuation cavity comprises a first sound collection area matched with a first sound absorption cotton pad, the first sound collection area is communicated with a second sound collection area matched with a second sound absorption cotton pad, the second sound collection area is an open slot, the size of the first sound collection area is smaller than that of the second sound collection area, the section of the first sound collection area is arched, sound attenuation grooves are uniformly formed in the inner side wall of the first sound collection area, the sound attenuation grooves are conical grooves, and the diameter of the sound attenuation grooves is gradually reduced from outside to inside;
The top of the first sound-absorbing cotton pad is provided with a buffer area, the buffer area is arc-shaped and presents as a wave crest, the first sound-absorbing cotton pad comprises a first sponge pad, and the first sponge pad is bent to form a first sound collecting area;
The second sound-absorbing cotton pad comprises a second sponge pad, a second sound-collecting area is formed in the space between two adjacent groups of the second sponge pads, boundary lines on opposite sides of the first sound-collecting area and the second sound-collecting area coincide, TPU elastic rubber rods which are opposite to the arc-shaped grooves are embedded in the second sponge pad, the arc-shaped grooves penetrate through the second sponge pad, the TPU elastic rubber rods are elliptical, the length of the TPU elastic rubber rods is identical to the width of the sound-insulating pad body, and the TPU elastic rubber rods correspond to the second sound-collecting area.
Preferably, the second foam-rubber cushion is stretched and deformed outwards when the TPU elastic rubber rod is deformed, so that the second sound collecting area space is compressed and becomes smaller, the arc-shaped groove is deformed downwards to form a trough, and simultaneously the first foam-rubber cushion is synchronously pulled to deform when the TPU elastic rubber rod is deformed, so that the first sound collecting area space is compressed and becomes smaller.
Preferably, the inner side wall of the second sound collecting area is provided with a reflecting surface, the reflecting surface is arc-shaped, the radian of the reflecting surface changes in real time along with the deformation of the second foam-rubber cushion, and the reflecting surface corresponds to the silencing groove.
The silent tire comprises a sound insulation pad, wherein the sound insulation pad is a sound insulation pad attached to the inner wall of the tire;
The tire comprises a tire body, wherein the outer side of the tire body is provided with a tread, the left side wall and the right side wall of the tire body are provided with tire walls, and the inner side of each tire wall is integrally formed with a tire bead;
the sound insulation pad is characterized in that a sealant layer is attached to the inner side wall of the tire body, one surface of the sound insulation pad body with a sound insulation cavity is attached to the inner wall of the tire body through the sealant layer, and a sound insulation groove corresponding to the sound insulation cavity is formed in the outer side wall of the sealant layer;
The sound reduction grooves are formed in the width direction of the sealing adhesive layer, the cross sections of the sound reduction grooves are arc-shaped, the width of the sound reduction grooves is the same as the size of the sound reduction cavity in the initial state, the length of the sound reduction grooves is the same as the length of the sound reduction cavity, and the sound reduction grooves and the sound reduction cavities are oppositely arranged and are the same in number;
the silencing cavity is arched in the initial state, the width of the silencing cavity is larger than the height of the silencing cavity, and the height of the silencing cavity is kept unchanged;
The width of the silencing cavity changes in the use state, the silencing cavity is arched and is higher than the width, and the height of the silencing cavity is kept unchanged.
The assembling method of the silent tire comprises the following specific steps:
S1: manufacturing a tire body based on a tire manufacturing process, and simultaneously preparing a sound insulation pad body matched with the tire body in size;
S2: then, a sealant layer is bonded and assembled on the inner side wall of the tire body;
s3: forming the sound reduction groove on the sealant layer by using a forming die of the sound reduction groove;
S4: the sound insulation pad body is packaged on the tire body, the sound reduction groove corresponds to the sound reduction cavity, then the sound insulation pad body is bonded and assembled on the sealing adhesive layer, and dynamic balance treatment is carried out on the mute tire after drying.
The invention has the technical effects and advantages that:
1. The sound insulation pad body is arranged in the invention, so that the noise generated in the tire driving process is effectively counteracted and absorbed, the effect of silence is achieved, vibration noise can be gradually absorbed after being reflected in the silencing cavity through the first sound absorption cotton pad, the second sound absorption cotton pad and the silencing cavity, the silencing effect is greatly improved, the first sound absorption cotton pad and the second sound absorption cotton pad can be matched to reduce the noise when the tire vibrates in a wider frequency range, the good noise reduction effect is achieved, meanwhile, the noise of air flowing in the tire is reduced through the matching of the buffer area in the wave crest state and the valley peak of the valley, the vibration noise and the air flowing noise during the rolling of the tire are reduced and absorbed through the combination of the inner and outer noise reduction modes of the sound insulation pad body, and the conductivity of the noise is greatly reduced.
2. According to the invention, when the mute tire slowly rolls, the energy conversion of noise is realized through the sound absorption cavity formed by the sound reduction groove and the sound absorption cavity, the transmission area of the noise can be increased through the sound absorption cavity in a flat state, the low-frequency noise generated when the tire slowly rotates can be well covered, the noise reduction treatment can be realized on the low-frequency noise, when the tire rapidly rotates, the TPU elastic rubber rod is deformed from a vertical elliptical shape to a transverse elliptical state, the deformed TPU elastic rubber rod can squeeze the second foam cushion, the space of the second sound collection area is reduced, the TPU elastic rubber rod which is deformed downwards can drive the first foam cushion to deform and move downwards, the first sound collection area is reduced, the width of the sound absorption cavity is gradually reduced in a use state, the height of the sound absorption cavity is arched and is larger than the width, the height of the sound absorption cavity is kept unchanged, the high-frequency noise generated when the tire rotates at a high speed is treated through the deformed sound absorption cavity, namely the sound reduction groove realizes the aggregation of the noise, the change of the cavity and the high-frequency noise are partially extruded by the second foam cushion, and the noise is simultaneously introduced into the first foam cushion to the first sound collection area to absorb the noise, and the noise is absorbed by the high-frequency noise absorption area after the reflection treatment is completed.
3. The air medium in the mute tire is compressed and expanded alternately, the volume of a compression area is reduced, the temperature is increased, and the periodical compression change can convert sound energy into heat energy, so that the purpose of reducing noise is achieved, the noise reduction operation can be carried out synchronously in the vertical direction and the circumferential direction, the noise generated in the tire rolling process can be greatly reduced, and the noise reduction effect is good.
Drawings
FIG. 1 is a schematic view showing the normal state structure of a sound insulation pad body according to the present invention;
FIG. 2 is a schematic view showing the structure of the sound insulation pad body according to the present invention in the working state;
FIG. 3 is a schematic view of a sectional partial structure of the sound insulation pad body of the present invention in an operating state;
FIG. 4 is a schematic view of the normal state structure of the silent tire of the present invention;
FIG. 5 is a schematic view of the structure of the silent tire of the present invention in a first operating state;
FIG. 6 is a schematic view of the second operating state of the silent tire of the present invention;
FIG. 7 is a schematic view of a partially sectioned structure of a silent tire of the present invention in its normal condition;
FIG. 8 is a schematic view of a partially cut-away structure of a silent tire according to the present invention in a first operating condition;
FIG. 9 is a schematic view of a partially cut-away structure of a second operating condition of the silent tire of the present invention;
FIG. 10 is a schematic cross-sectional view of a tire with a silent tire according to the present invention in a normal state;
FIG. 11 is an enlarged view of the structure of the portion A of the present invention;
FIG. 12 is a schematic cross-sectional view of a silent tire according to the present invention in a first operational state;
FIG. 13 is an enlarged view of the structure of the portion B of the present invention;
FIG. 14 is a schematic cross-sectional view of a second operating condition of the silent tire of the present invention;
fig. 15 is an enlarged view of the C part of the present invention.
In the figure: 10. a sound insulation pad body; 11. a glass fiber layer; 12. a first sound absorbing cotton pad; 121. a buffer area; 122. a first foam pad; 123. a sound deadening groove; 13. a second sound absorbing cotton pad; 131. a second sponge pad; 132. a TPU elastic rubber rod; 133. a trough; 134. a reflecting surface; 14. a sound deadening cavity; 141. a first sound collecting region; 142. a second sound collecting region; 15. an arc-shaped groove;
20. A tire body; 21. a tread; 22. a tire wall; 23. a bead; 24. a sound reduction groove; 25. and (5) a sealant layer.
Detailed Description
The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, but not all embodiments, and all other embodiments obtained by those skilled in the art without making any inventive effort based on the embodiments of the present invention are within the scope of protection of the present invention.
The invention provides a sound insulation pad attached to the inner wall of a tire as shown in fig. 1 to 3, which comprises a sound insulation pad body 10, wherein the sound insulation pad body 10 comprises a glass fiber layer 11, a sound insulation cavity 14 is uniformly arranged on the outer side wall of the glass fiber layer 11 along the circumferential direction, a first sound absorption cotton pad 12 which is integrally formed with the glass fiber layer 11 is arranged on one side, far away from an opening, of the sound insulation cavity 14, the first sound absorption cotton pads 12 and the second sound absorption cotton pads 13 are arranged in a staggered manner and are integrally formed, the sound insulation cavity 14 is a cavity formed by encircling two adjacent groups of second sound absorption cotton pads 13, the first sound absorption cotton pads 12 in the middle and the inner wall of the tire, an arc-shaped groove 15 is formed on the outer side wall of the second sound absorption cotton pad 13, and one side, far away from the inner wall of the tire, of the sound insulation pad body 10 is arranged on the side, where the arc-shaped groove 15 is located.
The glass fiber layer 11 can guarantee the support strength of the sound insulation pad body 10, improves the installation stability, and the sound insulation pad body 10 is made of light materials, and the weight is very little compared with a tire, so that the dynamic balance test after the tire manufacturing is finished is not influenced, the sound insulation pad body 10 aims at effectively counteracting and absorbing the noise generated in the tire driving process, and has the effect of silence, and vibration noise can be gradually absorbed after being reflected in the silencing cavity 14 through the correspondence of the first sound absorption cotton pad 12, the second sound absorption cotton pad 13 and the silencing cavity 14, so that the silencing effect is greatly improved.
Referring to fig. 3, the sound attenuation cavity 14 includes a first sound collection area 141 matched with the first sound absorption cotton pad 12, the first sound collection area 141 is communicated with a second sound collection area 142 matched with the second sound absorption cotton pad 13, the second sound collection area 142 is an open slot, the size of the first sound collection area 141 is smaller than that of the second sound collection area 142, the cross section of the first sound collection area 141 is arched, during actual use, noise transmitted from a tire will first enter the second sound collection area 142, and after the noise intensity is reduced by reflection of the second sound collection area 142, the noise enters the first sound collection area 141, and secondary noise reduction is completed through the first sound collection area 141.
Referring to fig. 3, the second sound-absorbing cotton pad 13 includes a second foam pad 131, the space between two adjacent second foam pads 131 forms a second sound-collecting area 142, and the boundary lines of the opposite sides of the first sound-collecting area 141 and the second sound-collecting area 142 are coincident, when sound is transmitted to the first sound-collecting area 141, since the size of the first sound-collecting area 141 is smaller than that of the second sound-collecting area 142, the noise gradually increases the reflection times along with the decrease of the space, so as to increase the energy vanishing speed of the noise and enhance the noise-reducing effect.
Referring to fig. 3, the second foam-rubber cushion 131 is provided with TPU elastic rubber rods 132 opposite to the arc-shaped grooves 15 in an embedded manner, the arc-shaped grooves 15 penetrate through the TPU elastic rubber rods 132 in an oval shape, the length of the TPU elastic rubber rods 132 is the same as the width of the sound insulation cushion body 10, the TPU elastic rubber rods 132 correspond to the second sound collecting areas 142, when noise is transmitted to the inside of the second sound collecting areas 142, the second foam-rubber cushion 131 can achieve preliminary noise reduction, and meanwhile, the TPU elastic rubber rods 132 can enhance the supporting strength of the second foam-rubber cushion 131.
Referring to fig. 3, the top of the first sound-absorbing cotton pad 12 is provided with a buffer area 121, the buffer area 121 is arc-shaped and presents as a peak, the first sound-absorbing cotton pad 12 includes a first foam pad 122, the first foam pad 122 is bent to form a first sound-collecting area 141, the TPU elastic rubber rod 132 deforms to perform outward stretching deformation on the second foam pad 131, so that the space of the second sound-collecting area 142 is compressed and becomes smaller, at the moment, the arc-shaped groove 15 deforms downwards to present as a trough 133, and meanwhile, the TPU elastic rubber rod 132 deforms to synchronously pull the first foam pad 122 to deform, so that the space of the first sound-collecting area 141 is compressed and becomes smaller.
It should be noted that, when the sound insulation pad body 10 is in the reset state, the depth of the arc-shaped groove 15 is smaller, and the centrifugal force received by the sound insulation pad body 10 gradually increases along with the rotation of the tire, so that the depth of the arc-shaped groove 15 increases along with the deformation of the second sound absorption cotton pad 13, and the storage amount of noise increases along with the increase of the depth of the arc-shaped groove 15, thereby realizing active noise reduction treatment and meeting the noise reduction requirement after the rotation speed of the tire increases.
The inner side wall of the second sound collecting area 142 is provided with a reflecting surface 134, the reflecting surface 134 is arc-shaped, the radian of the reflecting surface 134 changes in real time along with the deformation of the second foam pad 131, and the reflecting surface 134 corresponds to the silencing groove 123.
The noise reduction groove 123 is uniformly formed in the inner side wall of the first sound collection area 141, the noise reduction groove 123 is a conical groove, the diameter of the noise reduction groove 123 is gradually reduced from outside to inside, the reflection frequency of noise in the peak groove can be increased by the reflecting surface 134 of the arc surface, the noise is reduced after being reflected for multiple times by the reflecting surface 134, the energy of the noise is reduced, the noise is led into the noise reduction groove 123, the noise is rubbed when passing through the noise reduction groove 123 in a small hole state, vortex is generated after passing through the noise reduction groove 123 in a small hole state, and the noise reduction and absorption effect is improved.
The cooperation of first sound cotton pad 12 of inhaling and the cotton pad 13 of second of inhaling can reduce the noise when the tire vibrates in wider frequency range, reaches fine noise reduction effect, falls the noise of the inside air flow of tire by the valley peak cooperation of buffer 121 and trough 133 of crest state simultaneously and falls, accomplishes the vibration noise and the air flow noise when rolling the tire through the combination of the inside and outside mode of making an uproar of giving sound insulation pad body 10 and slows down the absorption, greatly reduced the conductivity of noise.
The noise generated by the air pumping effect of the tire pattern is referred to as the air pumping noise of the tire, and when the tire rolls on the ground, the air filled in the tire flows in the circumferential direction and flows in the vertical direction, the air flowing in the circumferential direction forms wave-shaped air flow in the tire, and after the tire is extruded, the tire cavity resonance sound generated by the vibration of the air in the tire is indirectly transmitted into the vehicle to form noise.
Based on this, the invention also provides a mute tire as shown in fig. 4-15, which comprises a sound insulation pad, a tire body 20, a tread 21 arranged on the outer side of the tire body 20, tire walls 22 arranged on the left and right side walls of the tire body 20, a tire bead 23 integrally formed on the inner side of the tire wall 22, a sealant layer 25 attached to the inner side wall of the tire body 20, wherein one surface of the sound insulation pad body 10 with the mute cavity 14 is attached to the inner wall of the tire body 20 through the sealant layer 25, a sound reduction groove 24 corresponding to the mute cavity 14 is formed on the outer side wall of the sealant layer 25, and the relationship between the surface of the sound insulation pad and the inner wall of the tire can be clearly known by referring to fig. 10-15 of the specification.
Referring to fig. 10-11, the sound-reducing grooves 24 are formed along the width direction of the sealant layer 25, the cross section of the sound-reducing grooves 24 is arc-shaped, the width of the sound-reducing grooves 24 is the same as the size of the sound-reducing cavity 14 in the initial state, the length of the sound-reducing grooves 24 is the same as the length of the sound-reducing cavity 14, and the sound-reducing grooves 24 and the sound-reducing cavity 14 are arranged opposite to each other and are the same in number.
The sealing glue layer 25 that does not punch can play the cushioning effect to rolling tire, can realize the separation to vibration noise simultaneously, further reduce the noise, and when the tire rolls to the sound attenuation groove 24, the cross-sectional area of the sound absorption cavity that sound attenuation groove 24 and amortization cavity 14 constitute along the radial cross section of tire body 20 can change this moment, like this at the vehicle in-process of marcing, the air medium in this sound absorption cavity will produce alternate compression and inflation, can convert acoustic energy into heat energy, thereby come the noise energy of reduction by a wide margin through energy conversion's mode, and the sealing glue layer 25 that does not punch can cause the separation layer by layer to extruded air, further reduce noise.
It should be noted that, referring to fig. 4, 7, 10 and 11, in the initial state of the silencing cavity 14, the width is greater than the height, the height of the silencing cavity 14 is kept unchanged, the width of the silencing cavity 14 is changed in the use state, the silencing cavity 14 is arched and the height is greater than the width, the height of the silencing cavity 14 is kept unchanged, in this state, the tire is in a static state or a slowly moving state, so that the deformation of the silencing cavity 14 is small, the noise reduction mode is to realize the energy conversion of noise through the sound absorption cavity formed by the noise reduction groove 24 and the silencing cavity 14, and the sound absorption cavity in the flat state can increase the transmission area of the noise, can well cover the low-frequency noise when the tire slowly rotates, and thus can realize the noise reduction treatment on the low-frequency noise.
When the tire is used normally and the speed per hour is not more than 80Km/h, the sound insulation pad body 10 rotates synchronously with the rotation of the tire, the centrifugal force applied to the sound insulation pad body 10 is relatively large, as shown in fig. 5, 8, 12 and 13, the TPU elastic rubber rod 132 deforms under the action of the centrifugal force, i.e. deforms from a vertical oval shape to a transverse oval shape, the deformed TPU elastic rubber rod 132 extrudes the second foam pad 131, so that the space of the second sound collecting area 142 is reduced, the downwards deformed TPU elastic rubber rod 132 drives the first foam pad 122 to deform downwards to reduce the first sound collecting area 141, the width of the silencing cavity 14 is gradually reduced in the use state, the silencing cavity 14 is arched and is higher than the width, the height of the silencing cavity 14 is kept unchanged, high-frequency noise generated by high-speed rotation of a tire is handled through the deformed silencing cavity 14, namely, the noise is gathered through the noise reduction groove 24, and then the noise is conducted into the second noise collecting area 142, the change of the cavity can be partially offset with the high-frequency noise, meanwhile, the noise is reflected on the reflecting surface 134 and then is conducted into the first noise collecting area 141, the noise is absorbed through the silencing groove 123, the high-frequency noise is distributed and is conducted into the silencing groove 123 to be absorbed, and the noise reduction absorption treatment can be performed on the high-frequency noise.
It is worth noting that, in the process of downward deformation of the TPU elastic rubber rod 132, the depth of the trough 133 is increased, and the amplitude of the buffer area 121 in the peak state is increased, and turbulence is implemented on the air flow in the circumferential direction inside the tire through the cooperation of the trough peak with the increased amplitude, so that the air flow noise is relieved and absorbed, the conductivity of the noise is greatly reduced, and the silencing effect in the use process of the tire is further improved.
It should be noted that, referring to fig. 6, 9, 14 and 15, when the tire rotates at a high speed at a speed of greater than 80Km/h, the TPU elastic rubber rod 132 deforms again under the action of centrifugal force to be in a flat state, so that the deformation amounts of the second foam pad 131 and the first foam pad 122 are larger, and the silencing cavity 14 is in a longitudinally arranged state, which can absorb high-frequency noise well, increase the reflection times and paths of the noise in the silencing cavity 14, greatly reduce the conduction energy of the noise, and complete the sound-reducing operation better.
In the tire advancing process, air media in the cavity are compressed and expanded alternately, the volume of a compression area is reduced, the temperature is increased, and the periodical compression change can convert sound energy into heat energy, so that the purpose of reducing noise is achieved, noise reduction operation can be carried out synchronously in the vertical direction and the circumferential direction, noise generated in the tire rolling process can be greatly reduced, and the noise reduction effect is good.
It should be noted that, the TPU elastic rubber rod 132 is limited in this way, but not limited to this way, as long as the structure that can realize self-deformation by centrifugal force and compress and deform the second sound absorbing cotton pad 13 is within the protection scope of this application, and the thickness dimension of the sound absorbing pad body 10 is 1/2-2/3 of the thickness of the tire body 20, so that the weight ratio is almost negligible while the noise reduction effect is satisfied, and the dynamic balance of the tire is not affected.
The invention also discloses an assembling method of the mute tire, which comprises the following specific steps:
s1: manufacturing the tire body 20 based on the tire manufacturing process, and simultaneously preparing the sound insulation pad body 10 which is matched with the size of the tire body 20;
S2: then, the inner side wall of the tyre body 20 is bonded and assembled with a sealant layer 25;
s3: the molding of the sound reduction groove 24 is completed on the sealing glue layer 25 by using a molding die of the sound reduction groove 24;
S4: the soundproof pad body 10 is packaged on the tire body 20 such that the sound-reducing grooves 24 correspond to the sound-deadening cavities 14, then the soundproof pad body 10 is adhesively assembled on the sealant layer 25, and after drying, dynamic balancing treatment is performed on the silent tire.
Finally, it should be noted that: the foregoing description of the preferred embodiments of the present invention is not intended to be limiting, but rather, although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements or changes may be made without departing from the spirit and principles of the present invention.
Claims (5)
1. The utility model provides a paste and locate sound insulation pad of tire inner wall which characterized in that: the sound insulation pad comprises a sound insulation pad body (10), wherein the sound insulation pad body (10) comprises a glass fiber layer (11), a sound attenuation cavity (14) is uniformly formed in the outer side wall of the glass fiber layer (11) along the circumferential direction, a first sound absorption cotton pad (12) integrally formed with the glass fiber layer (11) is arranged on one side, far away from an opening, of the sound attenuation cavity (14), the first sound absorption cotton pad (12) and the second sound absorption cotton pad (13) are arranged in a staggered mode and are integrally formed, the sound attenuation cavity (14) is a cavity formed by encircling between two adjacent groups of second sound absorption cotton pads (13) and the first sound absorption cotton pad (12) in the middle and the inner wall of a tire, and an arc-shaped groove (15) is formed in the outer side wall of the second sound absorption cotton pad (13);
The sound attenuation cavity (14) comprises a first sound collection area (141) matched with the first sound absorption cotton pad (12), a second sound collection area (142) matched with the second sound absorption cotton pad (13) is communicated with the outer side of the first sound collection area (141), the second sound collection area (142) is an open slot, the size of the first sound collection area (141) is smaller than that of the second sound collection area (142), the section of the first sound collection area (141) is arched, sound attenuation grooves (123) are uniformly formed in the inner side wall of the first sound collection area (141), the sound attenuation grooves (123) are conical grooves, and the diameter of the sound attenuation grooves is gradually reduced from outside to inside;
The top of the first sound-absorbing cotton pad (12) is provided with a buffer area (121), the buffer area (121) is arc-shaped and presents wave peaks, the first sound-absorbing cotton pad (12) comprises a first sponge pad (122), and the first sponge pad (122) is bent to form a first sound collecting area (141);
The second sound cotton pad (13) of inhaling includes second foam-rubber cushion (131), and two sets of adjacent space between second foam-rubber cushion (131) forms second sound collection district (142), boundary line coincidence of opposite one side in first sound collection district (141) and second sound collection district (142), second foam-rubber cushion (131) embedded cover is equipped with TPU elastic rubber stick (132) just right with arc wall (15), run through around arc wall (15), TPU elastic rubber stick (132) are oval, the length of TPU elastic rubber stick (132) is the same with the width of sound insulation pad body (10), just TPU elastic rubber stick (132) corresponds with second sound collection district (142).
2. The sound insulation mat of claim 1 attached to the inner wall of a tire, wherein: the TPU elastic rubber rod (132) deforms, and then the second sponge cushion (131) is stretched outwards to deform, so that the space of the second sound collecting area (142) is compressed and becomes smaller, the arc-shaped groove (15) deforms downwards to form a trough (133), and meanwhile the TPU elastic rubber rod (132) deforms, and simultaneously pulls the first sponge cushion (122) to deform, so that the space of the first sound collecting area (141) is compressed and becomes smaller.
3. The sound insulation mat of claim 2 attached to the inner wall of a tire, wherein: the inner side wall of the second sound collecting region (142) is provided with a reflecting surface (134), the reflecting surface (134) is arc-shaped, the radian of the reflecting surface (134) changes in real time along with the deformation of the second foam-rubber cushion (131), and the reflecting surface (134) and the silencing groove (123) are corresponding.
4. A silent tire comprising a sound insulation mat, characterized in that: the sound insulation pad is the sound insulation pad attached to the inner wall of the tire according to any one of claims 1 to 3;
The tire comprises a tire body (20), wherein a tread (21) is arranged on the outer side of the tire body (20), tire walls (22) are arranged on the left side wall and the right side wall of the tire body (20), and tire beads (23) are integrally formed on the inner side of the tire walls (22);
The sound insulation pad is characterized in that a sealing adhesive layer (25) is attached to the inner side wall of the tire body (20), one surface of the sound insulation pad body (10) with the sound insulation cavity (14) is attached to the inner wall of the tire body (20) through the sealing adhesive layer (25), and a sound reduction groove (24) corresponding to the sound insulation cavity (14) is formed in the outer side wall of the sealing adhesive layer (25);
The sound reduction grooves (24) are formed along the width direction of the sealant layer (25), the cross sections of the sound reduction grooves (24) are arc-shaped, the width of the sound reduction grooves (24) is the same as the size of the sound reduction cavity (14) in the initial state, the length of the sound reduction grooves (24) is the same as the length of the sound reduction cavity (14), and the sound reduction grooves (24) and the sound reduction cavity (14) are arranged oppositely and are the same in number;
The silencing cavity (14) is arched in the initial state, the width of the silencing cavity is larger than the height of the silencing cavity, and the height of the silencing cavity (14) is kept unchanged;
The width of the silencing cavity (14) is changed in the use state, the silencing cavity (14) is arched, the height of the silencing cavity is larger than the width, and the height of the silencing cavity (14) is kept unchanged.
5. A method of assembling a silent tire according to claim 4, wherein: the assembling method comprises the following specific steps:
S1: manufacturing the tire body (20) based on a tire manufacturing process, and simultaneously preparing the sound insulation pad body (10) matched with the tire body (20) in size;
s2: then, a sealant layer (25) is bonded and assembled on the inner side wall of the tire body (20);
s3: forming the noise reduction groove (24) on the sealing adhesive layer (25) by using a forming die of the noise reduction groove (24);
S4: the sound insulation pad body (10) is packaged on the tire body (20), the sound reduction groove (24) corresponds to the sound reduction cavity (14), then the sound insulation pad body (10) is assembled on the sealing adhesive layer (25) in a bonding mode, and dynamic balance treatment is conducted on the mute tire after drying.
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Cited By (1)
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| CN118182023A (en) * | 2024-05-16 | 2024-06-14 | 东营市方兴橡胶有限责任公司 | Mute tire and preparation method thereof |
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| CN118024789B (en) | 2024-06-11 |
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