CN111409396A

CN111409396A - Noise reduction tire

Info

Publication number: CN111409396A
Application number: CN202010304591.7A
Authority: CN
Inventors: 王志宏; 党保卫; 刘东鹏
Original assignee: Cheng Shin Tire and Rubber China Co Ltd
Current assignee: Cheng Shin Tire and Rubber China Co Ltd
Priority date: 2020-04-17
Filing date: 2020-04-17
Publication date: 2020-07-14

Abstract

The invention relates to a noise-reducing tire which comprises a plurality of rubber material layers which are stacked, wherein the stacked rubber material layers can form a tread portion, a tire shoulder and a tire side portion which are sequentially arranged from the middle to two sides along the axial direction of the tire through a vulcanization process; still include the bulge, the bulge is for inhaling the shake material and being located between the two-layer sizing material layer of the innermost side, and the bulge is trapezium structure, and trapezium structure's short base edge is located the child lateral part and sets up outwards, and trapezium structure's long base edge is located the child lateral part and extends to tread portion. The vibration and noise generated when the tire runs can be effectively reduced, the technological performance of the tire can be ensured, and the cost can be reduced.

Description

Noise reduction tire

Technical Field

The invention relates to the technical field of tires, in particular to a noise reduction tire.

Background

When the automobile is running, the tire is influenced by the road surface condition, so that the conditions such as vibration and jumping occur, the tire can be temporarily deformed under the conditions, when the tire grabs the ground, the tire pattern can deform due to movement to enable the tire to vibrate, the gas filled in the tire cavity can resonate under the conditions, the tire can generate noise, and the comfort of a driver and passengers is influenced.

In order to solve the problem of tire noise, the scheme adopted in the prior art focuses on destroying the resonance between the air in the tire cavity and the tire, namely installing (pasting) the sound-absorbing sponge or having a protruding structure on the inner rubber to inhibit the noise, but the processing technology of the method is complicated, and the sound-absorbing sponge needs to know the material quality, the service life and the performance of the pasting rubber. The extra adhesive material increases the manufacturing cost of the tire, and the protrusion structure has higher requirements on the tire vulcanization technology and poor economical efficiency.

Therefore, how to effectively reduce the vibration and noise generated when the tire travels, and to ensure the processing performance of the tire and reduce the cost is a technical problem to be solved by those skilled in the art.

Disclosure of Invention

The invention aims to provide a noise-reducing tire which can effectively reduce vibration and noise generated when the tire travels, ensure the technological performance of the tire and reduce the cost.

In order to solve the technical problem, the invention provides a noise-reducing tire which comprises a plurality of rubber material layers which are stacked, wherein the stacked rubber material layers can form a tread portion, a tire shoulder and a tire side portion which are sequentially arranged from the middle to two sides along the axial direction of the tire through a vulcanization process; still include the bulge, the bulge is for inhaling the shake material and being located between the two-layer sizing material layer of the most inboard, the bulge is trapezium structure, trapezium structure's short base limit is located child lateral part sets up outwards, trapezium structure's long base limit is located child lateral part extends to tread portion.

The short base edge is located at the sidewall portion, that is, the thickest portion of the trapezoidal structure is located at the sidewall portion, and the long base edge is located at the sidewall portion and extends to the tread portion, which corresponds to a local increase in the protrusion. The tire is at the in-process of walking, receives influence such as load and inflation volume to make tread portion towards the one end of sidewall portion and the deflection of sidewall portion great, has increased at the great position of deflection and has inhaled the bulge of inhaling the shake material, can make the tire when the walking, reduces the vibrations of the sidewall portion of tire and the tread portion towards the one end of sidewall portion, and then realizes the effect of making an uproar, promotes user experience.

Increase the bulge of inhaling the shake material at the great position of deflection, compare in the comprehensive bulge that increases to inhale the shake material (being equivalent to set up the bulge into the rectangle and lie in tread portion and side wall portion), set up the bulge into the volume that trapezoidal structure can reduce this bulge, it is less to the structure influence of original tire, and, owing to inhale the shake material cost higher, therefore, the bulge of inhaling the shake material can be when guaranteeing the antidetonation noise reduction effect of this tire in the local increase, and therefore, the cost is reduced, and the economic efficiency is improved.

In addition, the short base edge of trapezium structure sets up outwards, and the long base edge is towards the most inboard precoat, and this trapezium structure is to the outside protrusion of tire promptly, so sets up for when carrying out vulcanization technology to each layer precoat in order to make the tire profile, can avoid through the gasbag outwards promote each layer precoat and with tire mould extruded in-process, destroy the structure of bulge, can reduce the technological requirement when guaranteeing the structural stability of this bulge.

Optionally, the length that the long bottom edge extends to the tread portion is 1/4 of the length of the shoulder to the center of the tread portion.

Optionally, a rising angle of the long bottom side of the trapezoid structure towards one end of the tread portion is 30 ° to 40 °.

Optionally, a descending angle of the short bottom side of the trapezoid structure away from one end of the tread portion is 45-55 °.

Optionally, the shock-absorbing material is butyl rubber.

Optionally, the protruding portion and the innermost glue layer are of an integral structure.

Optionally, the innermost layer of sizing is formed by pressing to form the projections.

Drawings

FIG. 1 is a schematic, partial structural view in axial cross-section of a noise-reducing tire provided in accordance with an embodiment of the present invention;

FIG. 2 is a schematic view of the boss of FIG. 1 at segment BC;

FIG. 3 is a schematic view of the projection of FIG. 1 at section DE;

FIG. 4 is a schematic structural view of the innermost cement layer;

FIG. 5 is a test chart of noise in a vehicle when a general road is running at a high speed;

fig. 6 is an in-vehicle noise test chart when traveling at low speed on a rough road.

In the accompanying fig. 1-6, the reference numerals are illustrated as follows:

1-innermost sizing agent layer; 2-a projection.

Detailed Description

In order to make the technical solutions of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.

Referring to fig. 1-4, fig. 1 is a schematic partial structural view of an axial cross section of a noise reduction tire according to an embodiment of the present invention; FIG. 2 is a schematic view of the boss of FIG. 1 at segment BC; FIG. 3 is a schematic view of the projection of FIG. 1 at section DE; fig. 4 is a schematic structural view of the innermost cement layer.

The embodiment of the invention provides a noise-reducing tire, which comprises a plurality of rubber material layers which are stacked, wherein the stacked rubber material layers can form a tread portion, a tire shoulder and a tire side portion which are sequentially arranged from the middle to two sides in the axial direction of the tire after a vulcanization process, as shown in fig. 1, an AC section is the tread portion, a C section is the tire shoulder, and a CE section is the tire side portion, wherein the AC section of the tread portion can be grounded in the use process of the tire.

The noise-reducing tire further comprises a convex part 2, wherein the convex part 2 is positioned between the two innermost rubber layers, in the embodiment, the inner side refers to the side facing the inner cavity of the tire, correspondingly, the outer side refers to the side facing the outer side of the tire, as shown in fig. 4, the convex part 2 is in a trapezoidal structure, the trapezoidal structure comprises a short bottom edge and a long bottom edge which are arranged in parallel, the short bottom edge is positioned at the tire side part and arranged towards the outer side, and the long bottom edge of the trapezoidal structure is positioned at the tire side part and extends to the tire surface part.

The short base edge is located at the sidewall portion, that is, the thickest portion of the trapezoidal structure is located at the sidewall portion, and the long base edge is located at the sidewall portion and extends to the tread portion, which corresponds to a local increase of the convex portion 2. The tire is at the in-process of walking, receives influence such as load and inflation volume to make tread portion towards the one end of sidewall portion and the deflection of sidewall portion great, has increased at the great position of deflection and has inhaled the bulge 2 of inhaling the shake material, can make the tire when the walking, reduces the vibrations of the sidewall portion of tire and the tread portion towards the one end of sidewall portion, and then realizes the effect of making an uproar, promotes user experience.

Increase at the great position of deflection and inhale the bulge 2 of shake material, compare in the comprehensive increase inhale the bulge 2 of shake material (be equivalent to set up bulge 2 into the rectangle and lie in tread portion and side wall portion), set up bulge 2 into the volume that this bulge 2 can be reduced to the trapezium structure, it is less to the structural influence of original tire, and, because it is higher to inhale the shake material cost, consequently, the bulge 2 of shake material is inhaled in the local increase can be when guaranteeing the antidetonation noise reduction effect of this tire, and therefore, the cost is reduced, and the economic efficiency is improved.

In addition, in this embodiment, the short bottom edge of the trapezoid structure is arranged outwards, and the long bottom edge is arranged towards the innermost rubber layer 1, that is, the trapezoid structure protrudes towards the outer side of the tire, so that when the vulcanization process is performed on each rubber layer to manufacture the tire profile, the structure of the protruding portion 2 can be prevented from being damaged in the process of pushing each rubber layer outwards and extruding the tire mold through the air bag, and the structural stability of the protruding portion 2 can be ensured, and meanwhile, the process requirements are reduced.

In the above embodiment, the long bottom edge extends to 1/4 where the length of the tread portion is from the shoulder to the length at the center of the tread portion, point a is at the center of the mesa, point C is the shoulder position, the long bottom edge of the trapezoidal structure extends to point B of the tread portion, and the distance of segment BC is equal to 1/4 of the distance of segment AC. As shown in fig. 2, after the thickness of the bulge 2 gradually increases to the position of the shoulder C at the BC section, the thickness of the bulge 2 is more uniform in the CD section until the thickness of the bulge 2 is reduced at the DE section at the bead (as shown in fig. 3). So set up, can guarantee that this bulge 2 can increase the thickness of inhaling the shake material in the great position of each deflection, when guaranteeing antidetonation noise reduction effect, reduce this bulge 2's volume, reduce cost.

In the above embodiment, as shown in fig. 4, the rising angle θ of the long bottom side of the trapezoidal structure toward one end of the tread portion₁Is 30-40 degrees, and the short bottom edge of the trapezoid structure is far away from the tireLowering angle theta of one end of the face₂Is 45 DEG to 55 DEG, of course, in the present embodiment, for theta₁And theta₂Is not limited in size. Proved by a plurality of experiments, theta₁Within the range of 30-40 DEG, theta₂Within the range of 45-55 degrees, the volume of the bulge part 2 is reduced and the cost is reduced while the tire has better shock-resistant and noise-reducing effects.

In the above embodiment, the shock-absorbing material is butyl rubber, and the innermost rubber layer 1 is generally butyl rubber, which has better air-retention performance, so that the shock-absorbing material is selected from butyl rubber, so as to avoid the situation of immiscible between the protrusion 2 and the rubber layer, and ensure that the overall performance of the tire is not affected.

Further, in this embodiment, the protruding portion 2 and the innermost rubber layer 1 are of an integral structure, or the protruding portion 2 can be arranged as an integral structure adjacent to the innermost rubber layer 1 (i.e. an inner-to-outer second rubber layer), and the innermost rubber layer 1 and the protruding portion 2 are both butyl rubber, so that the integral structure and the manufacturing process can be simplified when the two are arranged into the integral structure.

Furthermore, the innermost mastic layer 1 is formed by pressing the projections 2, i.e. the projections 2 are formed by pressing the innermost mastic layer 1, which simplifies the forming process of the projections 2.

Specifically, the manufacturing process of the tire comprises the steps of extruding the innermost rubber material layer 1 to form the protruding part 2, stacking the innermost rubber material layer 1 and other rubber material layers in sequence layer by layer, clamping the protruding part 2 between the two rubber material layers, and extruding the stacked rubber material layers through an air bag and a tire mold to form the tire outline through a vulcanization process.

Referring to fig. 5 and 6, fig. 5 is a noise test chart in a vehicle when the vehicle is running on a general road at a high speed; fig. 6 is an in-vehicle noise test chart when traveling at low speed on a rough road.

The noise reduction performance of the noise reduction tire provided in the present embodiment was verified by the following tests:

an in-vehicle noise test was performed using a general passenger car as an example, using a tire having a specification of 205/55R16, under test conditions selected for high-speed running on a general road and low-speed running on a rough road, and results of the in-vehicle noise test using the tire of the related art and the tire provided in this example (the tire was vulcanized at 180 ℃ for 10 minutes, and the vibration-resistant and noise-reducing material was bonded to the tire) are shown in fig. 5 and 6, in which fig. 5 is a result of the test performed on the high-speed running on the general road, and fig. 6 is a result of the test performed on the low-speed running on the rough road.

As is apparent from the graphs of the in-vehicle noise graphs of fig. 5 and 6, the noise value of the tire provided by the present embodiment is lower than that of the tire in the prior art, and thus the noise reduction effect is significantly achieved, and the comfort of the passenger can be improved, regardless of whether the vehicle is driven at a high speed on a general road or at a low speed on a bad road.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that it is obvious to those skilled in the art that various modifications and improvements can be made without departing from the principle of the present invention, and these modifications and improvements should also be considered as the protection scope of the present invention.

Claims

1. The noise-reduction tire is characterized by comprising a plurality of rubber material layers which are stacked, wherein the stacked rubber material layers can form a tread portion, a tire shoulder and a tire side portion which are sequentially arranged from the middle to two sides in the axial direction of the tire through a vulcanization process;

still include bulge (2), bulge (2) are for inhaling the shake material and lie in between the two-layer sizing material layer of the innermost side, bulge (2) are the trapezium structure, the short base limit of trapezium structure is located sidewall portion sets up outwards, the long base limit of trapezium structure is located sidewall portion extends to tread portion.

2. The noise reducing tire of claim 1 wherein the length of the long bottom edge extending to the tread portion is 1/4 of the length of the shoulder to the center of the tread portion.

3. The noise-reducing tire according to claim 1, wherein a rising angle of a long bottom side of the trapezoidal structure toward one end of the tread portion is 30 ° to 40 °.

4. The noise-reducing tire according to claim 1, wherein a descending angle of the short bottom side of the trapezoidal structure from the end of the tread portion is 45 ° to 55 °.

5. A noise reducing tyre according to any of claims 1 to 3, wherein said shock absorbing material is butyl rubber.

6. A noise reducing tyre according to claim 5, wherein the lugs (2) are of one-piece construction with the innermost layer of mastic (1).

7. A noise reducing tyre according to claim 6, characterized in that the innermost layer of mastic (1) is formed by forming the lugs (2) by pressing.