KR101993303B1 - Pneumatic tire having noise reduction member - Google Patents

Abstract

The present invention relates to a pneumatic tire having a noise reduction member, and more particularly, to a pneumatic tire having a pneumatic tire, a body fly constituting a skeleton of the tire along with the inner liner on the lower side of the tread contacting the road surface, A rim mounted on the tire through a bead portion which is turned up and wrapped by the body fly and a noise reducing member provided on the tire to reduce resonance noise generated in the cavity between the tire and the rim In the tire, the noise reduction member is formed in a plurality of layers between the body ply and the inner liner with reference to the center line, and is formed inside the left and right positions of the shoulder portion. The noise reduction member includes a noise reduction member By applying it from the tire forming step to the finished tire product As there is an effect such that increase in the cavity noise-reducing ability due to the resonance with the number less effort as well as the noise-reducing member installed accurately from the tire manufacturing steps to install the noise-reducing member.

Description

Technical Field [0001] The present invention relates to a pneumatic tire having a noise reduction member,

The present invention relates to a pneumatic tire having a noise reduction member, and more particularly, to a noise reduction member composed of noise preventing tapes by applying the tire building process, The present invention also relates to a pneumatic tire provided with a noise reducing member for increasing the noise reducing ability of the cavity by resonance as the noise reducing member is precisely installed from the tire manufacturing stage.

Recently, as the power performance of automobiles has been improved, researches on improving the performance of tires have been actively conducted. Tires are the only parts of the vehicle that are in contact with the ground, and are an important part of the vehicle's power transmission, redirection, fuel economy and braking performance.

These tires, in addition to the basic power performance, are closely related to the noise and vibration performance that occur during driving. Especially, the main reason of the load noise occurring in the low frequency range of 200 to 250 Hz is the resonance sound generated by the driving of the tire. An effective method for reducing such resonance sound is to remove the resonance sound directly from the tire It is most effective. Since the tire is mounted on the vehicle with the rim engaged, the tire and the rim form a closed type structure and are filled with air at a high pressure of 30 to 40 psi. The sealed tire of such a high pressure state is rotated by the engine output, and a resonance sound is generated by the high rotational torque.

As described above, the pneumatic tire for reducing the resonance noise of the cavity of the tire has already been widely disclosed, and a detailed explanation thereof is omitted. The pneumatic tire disclosed in Japanese Patent No. 10-1767077 entitled " Pneumatic tire ", Japanese Patent No. 10-1535029 Quot; pneumatic tires ", registered patent No. 10-1147627, "low noise pneumatic tires ", and the like.

As a method for reducing the noise caused by the cavity resonance phenomenon, it has been proposed to absorb the resonance sound by adding a sound absorbing material to the inside of the finished tire. However, since the characteristics of the sound absorbing material are not sufficiently examined, Can not be achieved.

In order to improve the resonance sound, a tire having a structure in which a foamed urethane foam is attached by using a double-sided tape and a toluene-based primer to a tire is produced. That is, a sound absorbing material processed by foaming a polyurethane (PU) And is used.

However, there is a problem that the polyurethane re-absorption material is damaged due to hydrolysis under the condition of moisture and high temperature, and the NVH function is deteriorated. Further, when the tire is running on the road, the adhesiveness of the adhesive may deteriorate, thereby deteriorating the physical properties and life of the tire. Therefore, there is a need for research to improve tire performance while minimizing noise generation.

On the other hand, in the above-mentioned Japanese Patent No. 10-1767077, a sound absorbing member is provided on an inner liner using an adhesive member. However, since the sound absorbing effect is not effective and the tire must be attached after manufacturing, have.

In addition, in the above-mentioned Japanese Patent No. 10-1535029, a sound absorbing material including polypropylene meltblown fibers is formed on a sealant layer formed on an inner liner layer of a tire, but since a sound absorbing material is attached through an additional process, There is a problem that the manufacturing cost is raised and the expectation is not reached.

In addition, in the above-mentioned Japanese Patent No. 10-1184826, the noise reducing member using the sound absorbing material is provided on the inner side of the inner liner of the tire. However, In fact, there is a problem that it is difficult to reduce the resonance sound inside the tire. Further, it is difficult to provide a noise reducing member on the outer circumferential surface of the rim, and there is a problem that improvement in fuel consumption and vibration of the vehicle is required due to an increase in overall weight.

Further, by changing the shape and structure of the tread of the tire, resonance tones inside the tire are partially improved. However, the tread shape has to be limitedly changed depending on the type of the tire, and the manufacturing cost of the mold for changing the shape of the tread is increased .

In addition, in the above-mentioned Japanese Patent No. 10-1147627, since a band-shaped sound-absorbing member is attached to the inner surface of a tire by an elastic fixing band, there is a fear that another noise may be generated by the elastic band with good noise reduction Since the tire is separately provided on the inner surface of the tire after the tire is manufactured, the inner structure of the tire is complicated and the work flow increases.

Accordingly, a separate process is added to increase the sound absorption performance after manufacturing the tire and the wheel, thereby increasing the manufacturing cost of the tire. Also, there is a problem that it is inconvenient to store the manufactured tire and the wheel so that the sound absorption performance is improved through a separate process.

In addition, since the standard of the tire is in a low level of peace, the inner space is narrow and it is difficult to apply the existing sound absorbing material to the inner space.

[Patent Literature 0001] Registered Patent No. 10-1767077 "Pneumatic Tire" (Announcement 2017.08.11.) [Patent Literature 0002] Registered Patent No. 10-1535029 "Low Noise Tire" (Bulletin 2015.07.07.) [Patent Literature] Registered Patent No. 10-1184826 "Pneumatic Tire" (Announcement 2012.20.20.) [Patent Literature] Registered Patent No. 10-1147627 "Low Noise Pneumatic Tire" (Announcement: 2012.09.20.)

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a noise reduction member capable of effectively reducing noise caused by resonance of a tire cavity.

Another object of the present invention is to provide a tire having a noise reduction structure that can be easily installed even on a flat tire with low flatness and can reduce noise in the car easily at low cost without deteriorating the workability of the tire and the rim .

It is still another object of the present invention to provide a noise reducing member which is produced by laminating a noise reducing member between a body fly and an inner liner at the time of manufacturing a tire by resonating vibration of air generated inside the tire, So that the noise reduction effect can be maintained.

It is a further object of the present invention to increase the noise reducing effect of the cavity of a tire when the noise reducing member is further attached along the outer surface of the inner liner in addition to the body fly and the inner liner at the time of manufacturing the tire.

It is another object of the present invention to provide a noise reducing member which is separately installed on one side of a cavity of a tire by using a noise reducing member formed by stacking a plurality of noise preventing tapes, So that one operation can be omitted.

It is still another object of the present invention to provide a noise reduction member that is formed by laminating a noise-preventing fiber tape produced by applying a fiber-absorbing synthetic resin during tire manufacturing among other noise preventing tapes, The resonance noise due to the cavity of the tire can be more effectively reduced by applying the noise reduction member formed by combining the tire with the tire.

According to another aspect of the present invention, there is provided a pneumatic tire including a pneumatic tire, a body ply forming a skeleton of a tire along with an inner liner on a lower side of a tread contacting the road surface of the tire, And a noise reducing member provided on the tire for reducing resonance noise generated in the cavity between the tire and the rim, wherein the noise reduction member comprises: a rim mounted on a tire through a wrapped bead; The member is formed in a plurality of layers between the body ply and the inner liner with respect to the center line, and is formed inside the left and right positions of the shoulder portion.

The noise reduction member is formed by laminating a plurality of layers between the inner liner and the inner body liner corresponding to the left and right positions of the shoulder portion with respect to the center line.

The noise reduction member may be disposed in an annular shape along the circumferential direction or in an annular shape along the circumferential direction, and may be arranged in a divided form at regular intervals.

In addition, the noise reduction members are disposed on both left and right sides of the tire with an interval in the width direction.

The noise reduction member may be formed by overlapping at least one of the noise prevention tape, the noise prevention rubber plate, and the noise prevention fiber tape, or by stacking a plurality of the noise reduction members.

At least one of the noise reduction member, the noise prevention tape, the noise prevention rubber plate, and the noise prevention fiber tape may be formed of a general type of noise prevention tape having no noise reduction hole or a perforated noise prevention hole having a noise reduction hole And is formed of a tape.

The noise reduction member may be formed by arranging the perforated tape in the upper and lower positions or by superposing the perforated tape only, or by arranging the general-purpose tape in the upper and lower positions with the noise- And at least one of them is formed.

According to the pneumatic tire having the noise reduction member of the present invention, it is possible to reduce the resonance noise of the tire cavity by manufacturing a plurality of layers of the noise reduction member laminated between the body ply and the inner liner.

In addition, since the noise reducing member is laminated on the inner liner in the tire building process and the body ply is laminated on the inner liner, it is possible to omit the noise prevention operation separately, thereby reducing the number of operations.

In addition, since the noise reducing member formed by overlapping the noise preventing tape is provided on the tire, the present invention can be easily applied to a low flat tire.

In addition, the noise reduction member can be attached to a local portion of the tire, which is expected to have a high noise level, to reduce the noise, and thus the noise reduction efficiency is effective.

Further, since the noise reducing member can be further attached to the surface of the inner liner, there is an advantage that the noise reducing effect can be increased.

In addition, since the noise reduction member mitigates vibrations and impact transmitted from the road surface, it is possible to effectively prevent noise from being transmitted to the cavity and the vehicle interior.

1 is a perspective view schematically showing a pneumatic tire having a noise reducing member according to the present invention.
Fig. 2 is an enlarged view of a laminated portion of the noise reduction member shown in Fig. 1; Fig.
Fig. 3 is a view schematically showing the lamination of the noise reduction member shown in Fig. 2; Fig.
Fig. 4 is a view showing another embodiment of the noise reducing member shown in Fig. 1; Fig.
Fig. 5 is a view showing still another embodiment of the noise reducing member shown in Fig. 1; Fig.

For a better understanding of the present invention, a preferred embodiment of the present invention will be described with reference to the accompanying drawings. The embodiments of the present invention may be modified into various forms, and the scope of the present invention should not be construed as being limited to the embodiments described in detail below. The present embodiments are provided to enable those skilled in the art to more fully understand the present invention. Therefore, the shapes and the like of the elements in the drawings can be exaggeratedly expressed to emphasize a clearer description. It should be noted that in the drawings, the same members are denoted by the same reference numerals. Further, detailed descriptions of well-known functions and configurations that may be unnecessarily obscured by the gist of the present invention are omitted.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a pneumatic tire having a noise reduction member of the present invention will be described in detail with reference to the preferred embodiments of the present invention with reference to the accompanying drawings.

As shown in Fig. 1, the pneumatic tire 2 provided with the noise reducing member according to the present invention comprises an air inlet tire 2, a lower portion of a tread 4 contacting the road surface of the tire 2, A body ply 6 constituting a skeleton of the tire 2 side by side with the inner liner 8 on one side and a body ply 6 mounted on the tire 2 through a bead portion 10 turned up and wrapped by the body ply 6 And a noise reduction member 30 installed on the tire 2 to reduce resonance noise generated in the cavity 12 between the tire 2 and the rim 20 .

The tread 4 is located on the outermost side of the tire and is formed of a thick rubber layer to transmit the driving force and the braking force of the vehicle to the ground. On the surface of the tread 4, blocks partitioned by tread patterns and tread patterns for steering stability, traction and braking performance are formed. The tread patterns include grooves for drainage on running on wet roads and sipes for improving traction and braking forces. The groove is composed of a circumferential groove coinciding with the running direction of the vehicle and a transverse groove between the circumferential grooves. The sipes are formed in the block and are grooves smaller in size than the grooves. In addition, the siphon absorbs moisture at the time of traveling on a wet road surface and breaks the water film, thereby increasing the driving force and the braking force of the pneumatic tire 2.

The sidewall 18 extending from the tread 4 and forming the side surface of the tire 2 is disposed extending downward from the end of the tread 4. Sidewall 18 protects the body ply 6 layer, provides lateral stability of the pneumatic tire 2, and enhances ride comfort by bending motion. The sidewall 18 also serves to transmit the torque of the engine received through the drive shaft to the tread 4.

The inner liner 8 is a layer for preventing air leakage of the pneumatic tire 2 in place of the tube, and is made of a rubber layer having excellent airtightness. For example, the inner liner 8 may be made of butyl rubber or the like having a high density and maintains the air pressure in the pneumatic tire 2.

1, the noise reducing member 30 provided on the pneumatic tire 2 is disposed between the body ply 6 and the inner liner 8 with respect to the center line CL, (L) right (R) position of the shoulder portion 16, as shown in Fig. Further, the noise reducing member 30 may be formed on the center line CL.

The noise reducing member 30 is disposed between the body ply 6 and the inner liner 6 corresponding to the left (L) right (R) position of the shoulder portion 16 with respect to the center line CL. 8, which are stacked in layers. As shown in FIG. 4, the noise reduction member 30 may be disposed in an annular shape along the circumferential direction, or in an annular shape along the circumferential direction, but may be disposed in a divided shape at regular intervals.

1, the noise reducing member 30 is disposed on both sides of the left (L) right R with a gap in the width direction of the tire 2. [ As shown in FIGS. 2 and 3, the noise reduction member 30 may be formed by stacking at least any one of the noise prevention tape, the noise prevention rubber plate, and the noise prevention fiber tape in a superimposed manner, It is also possible to do. That is, the noise reduction effect and the performance of the pneumatic tire 2 are improved by the noise reduction member 30 formed by overlapping the tapes on both sides of the shoulder portion 16 side. Accordingly, as the thickness of the position corresponding to the inside of the shoulder portion 16 is increased, not only the sound absorption but also the vibration is reduced.

5, at least one of the noise preventing tape, the noise preventing rubber plate, and the noise preventing fiber tape may be a general type of noise preventing tape without the noise reducing hole (h) (T1), or a perforated noise preventing tape (T2) having a noise reducing hole (h).

5, the noise reducing member 30 may be formed by arranging the general type tape T1 on the upper and lower sides with the perforated tape T2 as the center, or by overlapping only the perforated type tape T2 as shown in Fig. Alternatively, it may be formed by arranging the general type tape T1 on the upper and lower sides with the noise preventing fiber tape T3 as a center.

Hereinafter, the operation of the noise reducing member 30 provided in the tire according to the present invention will be described in detail.

First, the tire 2 performs rolling motion due to the running of the vehicle, friction occurs between the road surface and the road surface during turning and turning, and at this time, the vibration of the tire 2 causes the cavity 2, which is formed between the tire 2 and the rim 20, (12). That is, the tread 4 is widely contacted with the road surface on the basis of the center line CL of the tire 2, so that the noise is induced and calmed almost simultaneously, but the vibration transmitted to the shoulder portion 16 is transmitted to the sidewill 18 To resonate the cavity 12.

The noise generated during traveling of the tire 2 is diffused and interferes with the concentration of the driver, and when the vehicle is turning, a load is applied to the widthwise edge of the tire 2 There is a problem that it generates bad unpleasant noise by rubbing against the road surface.

The noise reduction member 30 according to the present invention can solve the above problem. That is, the noise reduction member 30 according to the present invention is installed inside the shoulder portions 16 on both sides in the width direction of the tire 2, The noise that may occur in the cloud of the airflow is reduced. As the noise reducing member 30 is formed to have a predetermined thickness, the noise diffused through the tread 4 is absorbed by the noise reducing member 30 and is reduced. At the same time, the noise reduction member (30) can cancel the vibrations as well, thereby enabling quiet running.

In other words, since the noise reduction member 30 is formed on the tire in combination with any one or a combination of the noise preventing tape, the noise preventing rubber plate, and the noise preventing fiber tape, resonance tones that can be generated in the cavity 12, The noise generated during the running of the vehicle 2 is effectively reduced.

The noise reducing member 30 is laminated between the body ply 6 and the inner liner 8 and is constructed as shown in Figs. 4 and 5, and when applied to the tire 2, It is also possible to maximize the maximum.

The embodiments of the pneumatic tire having the noise reduction member of the present invention described above are merely illustrative and those skilled in the art will appreciate that various modifications and equivalent embodiments can be made without departing from the scope of the present invention. You can see that it is possible. Therefore, it is to be understood that the present invention is not limited to the above-described embodiments. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims. It is also to be understood that the invention includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims.

2: Tire 4: Tread
6: Body fly 8: Inner liner
10: bead portion 12: cavity portion
16: Shoulder 20: Rim
h: Noise Reduction Hole T1: General Noise Reduction Tape
T2: Perforated noise-preventing tape T3: Noise-resistant fiber tape

Claims (7)

delete delete delete delete A pneumatic tire (2); A body ply 6 forming a skeleton of the tire 2 in parallel with the inner liner 8 on the lower side of the tread 4 contacting the road surface of the tire 2; A rim 20 mounted on the tire 2 through a bead portion 10 which is turned up and wrapped by the body ply 6; In order to reduce the resonance noise generated in the cavity 12 between the tire 2 and the rim 20 , a left (L) rightward (R) rightward in the width direction with respect to the center line CL of the tire 2 A noise reduction member 30 which is stacked inside the space between the body ply 6 and the inner liner 8 located on both sides of the shoulder 16 and is disposed at an interval in the circumferential direction ; And a pneumatic tire,
The noise reduction member (30)
Wherein at least one of the noise preventing tape, the noise preventing rubber plate, and the noise preventing fiber tape is formed by overlapping one another, or a plurality of these are piled up after being combined. 6. The method of claim 5,
The noise reduction member (30)
At least one of the noise preventing tape, the noise preventing rubber plate and the noise preventing fiber tape is formed of a general type of noise preventing tape T1 having no noise reducing hole h or a perforated noise having a noise reducing hole h And an anti-vibration tape (T2). The method according to claim 6,
The noise reduction member (30)
It is possible to form the general type tape T1 by placing the perforated tape T2 at the top and bottom or by superimposing only the perforated type tape T2 or placing the general type tape T1 at the top and bottom Wherein the noise reduction member is formed of at least one of a plurality of the noise reduction members.

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