CN118219710A - Run-flat tire capable of preventing abnormal sound - Google Patents

Abstract

The invention discloses a run-flat tire capable of preventing abnormal noise, which relates to the technical field of run-flat tires, and aims to improve the tire performance by optimizing the tire profile parameter ratio and innovations of different structures from the tire mold profile design, taking steel wire reinforcement as zero air pressure support, optimizing the difference parameter design of each part, and solving the defect that the conventional run-flat tire generates discontinuous abnormal noise due to the problem of sinking under winter or low air pressure starting.

Description

Run-flat tire capable of preventing abnormal sound

Technical Field

The invention relates to the technical field of run-flat tires, in particular to a run-flat tire capable of preventing abnormal sound.

Background

The tire is an indispensable component of an automobile and is also a consumption component of the automobile, but because various reasons such as road conditions, people encounter a lot of conditions such as puncture and leakage of the tire in the using process of the automobile, the tire is forced to be replaced on a road due to tire failure, the travel time of people is delayed, and when extra trailer cost is serious, the conditions such as danger caused by tire burst can even occur, so that the run-flat tire can be generated, and the tire can continue to travel for a certain distance under the condition that the tire is completely free of air.

The present application provides a solution to the problem that the conventional run-flat tire is required to have a sidewall thickened to reduce the comfort of the tire and to increase the rigidity of the tire in winter or in a low air pressure condition, so that the tire can still provide sufficient support in case of damage or loss of air pressure, and the friction between the tire and the rim is intermittent and abnormal when the vehicle starts.

Disclosure of Invention

The invention aims to provide an abnormal sound prevention run-flat tire, which is used for solving the defect that the friction between the tire and a rim is intermittent due to the sinking problem of the traditional run-flat tire under the condition of winter or low-pressure starting, and simultaneously, the comfort of the run-flat tire can be greatly improved without reducing the zero-pressure capacity of the tire.

The aim of the invention can be achieved by the following technical scheme: the run-flat tire comprises heat-resistant and wear-resistant tread rubber, a tire skeleton carcass layer, a tire bead and a tire side, wherein high-adhesion base rubber, a binding layer, a buffer layer and a sealing layer are arranged between the heat-resistant and wear-resistant tread rubber and the tire skeleton carcass layer, a cavity is arranged in the inner position of one side of the sealing layer and the tire skeleton carcass layer corresponding to the tire side, a rubber core with super-strong supporting performance is filled in the cavity, and a triangular rubber core is arranged in the inner position corresponding to the tire bead;

The tire comprises a tire carcass layer, a tire core, a tire reinforcement steel wire layer, an anti-abrasion rubber layer, an upper endpoint, a lower joint surface endpoint and an inner endpoint, wherein the middle position of the tire carcass layer is provided with the reinforced steel wire layer, the anti-abrasion rubber layer is arranged at the lower position of the tire side, and the position of the heat-resistant and anti-abrasion tread rubber corresponding to the rubber core with the ultra-strong supporting performance is provided with the upper endpoint, the lower joint surface endpoint and the inner endpoint respectively.

Further provided is that: the thickness of the high-adhesion-performance base rubber is 1.2-2.5 mm, the high-adhesion-performance base rubber is respectively provided with 2a, 2b and 2c along the outline direction of the tire, the thickness of the high-adhesion-performance base rubber 2a, 2b and 2c gradually decreases, and the thickness of the high-adhesion-performance base rubber at the 2c position is 0.6-1 times the thickness of the high-adhesion-performance base rubber at the 2a position.

Further provided is that: the binding layer is spirally wound with 8-12 nylon wires at a screw pitch of 8-10 mm to form flat layers 3a and 3B, the buffer layers are respectively arranged to be 4a and 4B along the direction from the heat-resistant and wear-resistant tread rubber to the tire skeleton carcass layer, the distance between the flat layers 3a and 3B is uniform, and the width of the flat layers 3a and 3B is 2-6 mm larger than the width of the flat layers 4B.

Further provided is that: the hardness of the super-strong supporting performance rubber core of the sealing layer and the tire skeleton carcass layer at the side wall position is selected to be 70-80A, the thickness RF1 of the super-strong supporting performance rubber core 14 at the outer end point position of 4B is 2.5-4.5 mm, the transverse distance RFS from the upper end point of the super-strong supporting performance rubber core to the outer end point of 4B is preferably set to be 10-22 mm, and the radial vertical distance RFH from the lower end point position of the super-strong supporting performance rubber core to S is set to be 8-15 mm.

Further provided is that: the height SA of the triangular rubber core is equal to 0.5-0.65 times SDH, the width of the middle bottom of the triangular rubber core is 6.2-10.9 mm, the width of the top of the triangular rubber core is 0.5-1.0 mm, and the reinforcing steel wire layer is arranged on the inner side of the triangular rubber core.

Further provided is that: the height C of the reinforced steel wire layer is 0.8-1.1 times SA, the radial distance from the lower edge to S is BH, the height is 4-8 mm, and the thickness is set to be 1.1-1.45 mm.

Further provided is that: the tire skeleton carcass layer is reversely wrapped to the tire side along the reinforcing steel wire layer, the tire bead and the triangular rubber core, the radial height from the end point of the reverse wrapping to the S position is PLH, the height is set to be 0.8-1.2 times SDH, the sealing layer is reversely wrapped to the outer side of the tire bead along the tire bead, and the radial distance LH from the end point to the S position is set to be 5-10 mm.

Further provided is that: the radial height RCH2 from the upper end point of the tire side to S, the radial height RCH1 from the lower joint surface end point to S position, the height of RCH1 is set to 21-28 mm, the radial height RCH2 is 10-20 mm greater than the height RCH1, the radial height of the anti-abrasion adhesive layer from the inner end point to S position along the bead package is 10-15 mm.

The invention has the following beneficial effects:

1. The whole structure is optimized and improved based on a conventional run-flat tire, and is specifically embodied in structures such as high-adhesion base rubber, a binding layer, a rubber core with ultra-strong supporting performance, a triangular rubber core, a strong steel wire layer and the like, wherein the high-adhesion base rubber is firstly provided with 2 a-2 b-2 c which are obtained through equidistant arrangement, and the thicknesses in three positions are further limited, so that the high-speed running heat dissipation capability of the tire is ensured. And promote tire performance, the thickness/hardness of superstrong supporting performance rubber core, triangle-shaped rubber core's thickness, reinforcement steel wire layer are further restricted to the same, its aim at: the tire is ensured to continue running under the condition of damaging or losing air pressure, and in the state of continuing running, the structural appearance of the triangular rubber core is used for bearing all the load born by the tire;

2. In connection with the above, it should be noted that: when the reinforced steel wire layer is used for supporting the whole tire, the thickness of the reinforced sealing layer and the turn-up mode are used, so that the tire is mainly prevented from being deflated, in addition, under the condition that the tire loses air pressure, the parameters of the reinforced steel wire layer are limited again, the supporting capacity of the tire under the condition that the air pressure is lost can be improved, the deformation of the tire bead position is reduced, and the intermittent abnormal sound generated by friction between a tire bead and a rim is eliminated.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a cross-sectional view of a run-flat tire with anti-rattle features in accordance with the present invention;

FIG. 2 is a schematic diagram of a protection table G in a run-flat tire for preventing abnormal noise according to the present invention;

FIG. 3 is a set of performance test data for an anti-rattle run-flat tire according to the present invention;

FIG. 4 is a graph showing two sets of performance test data for an anti-abnormal noise run-flat tire according to the present invention;

fig. 5 shows three sets of performance test data for a run-flat tire with anti-rattle performance according to the present invention.

In the figure: 1. a heat and wear resistant tread rubber; 2. a high adhesion performance base rubber; 3. a tie layer; 4. a buffer layer; 5. a carcass layer of a tire carcass; 6. a sealing layer; 7. an upper endpoint; 8. a cavity; 9. a sidewall; 10. an anti-abrasion adhesive layer; 11. a bead; 12. a triangular rubber core; 13. a reinforcing steel wire layer; 14. and the rubber core has super strong supporting performance.

Detailed Description

The technical solutions of the present invention will be clearly and completely described in connection with the embodiments, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Example 1

For the run-flat tire, the run-flat tire is essentially a part of a supporting automobile, and the conventional run-flat tire has the defect of discontinuous abnormal sound caused by the friction between the tire and a rim due to the problem of sinking under the condition of winter or low-pressure starting, and meanwhile, the comfort of the run-flat tire can be greatly improved while the zero-pressure capacity of the tire is not reduced, so that the following technical scheme is provided:

Referring to fig. 1 to 2, an abnormal sound prevention run-flat tire in the present embodiment includes a heat and wear resistant tread rubber 1, a tire carcass layer 5, beads 11 and sidewalls 9, including the heat and wear resistant tread rubber 1, the tire carcass layer 5, the beads 11 and the sidewalls 9, a high adhesion performance base rubber 2, a tie layer 3, a buffer layer 4 and a sealing layer 6 are provided between the heat and wear resistant tread rubber 1 and the tire carcass layer 5, a cavity 8 is provided in one side inner position of the sealing layer 6 and the tire carcass layer 5 corresponding to the sidewalls 9, a super strong supporting performance rubber core 14 is filled in the cavity 8, and a triangular rubber core 12 is provided in an inner position corresponding to the beads 11;

a reinforcing steel wire layer 13 is arranged in the middle of the triangular rubber core 12 and the tire skeleton carcass layer 5, an anti-abrasion rubber layer 10 is arranged below the tire side 9, and an upper endpoint 7, a lower joint surface endpoint and an inner endpoint are respectively arranged at the positions of the heat-resistant and abrasion-resistant tread rubber 1 corresponding to the rubber core 14 with super strong supporting performance;

The tire profile is provided with a horizontal shaft E, the radial height from the lower part of the horizontal shaft E to the position of the contact diameter datum line is SDH, the height is set to be 0.45-0.55 times H, H is the total height of the section of the tire, a reference datum exhaust line S is set from the contact diameter datum line of the tire to the radial height SH, the SH height is set to be 0-3 mm, a protection table G is arranged below the horizontal shaft, the vertical height RIMH of the protection table G to S is set to be 23-30 mm, the total width K of the protection table G is preferably 3-6 mm, the protection table G and the circular arc of the sidewall are respectively connected by using R3-R4 circles, wherein R3 is preferably 10-15 mm, R4 is preferably 15-20 mm, a circumferential exhaust line R is set at the radial distance from the radial distance RH height of the S, the RH height is set to be 21mm, the radial distance R1H of the sub-opening position is provided with circular arcs R1 and R2 tangential, the radial height R1H is preferably 6-10 mm, the radius R1 is preferably 6-10 mm, the total width of the protection table G is preferably 6-6 mm, the radial distance R1 is preferably 6-10 mm, the radial distance BW is preferably 2 BW is preferably 3-5 mm, the radial distance from the radial distance R1 is 5-5 mm and the rim is 5-5 mm, and the effective friction can be reduced when the rim is designed to be reduced by the opposite to the rim, the rim is preferably 5-5 mm, and the rim is reduced by the corresponding to the rim with the rim, when the rim is preferably 5 and the rim is set to the corresponding to the rim with the rim;

The tire crown part is provided with heat-resistant and wear-resistant tread rubber 1, the thickness of the heat-resistant and wear-resistant tread rubber is the same as the thickness of the tire crown, the tire crown is provided with two circumferential main grooves G1 and G2 and a plurality of transverse side grooves G3, wherein the depths of the G1 and the G2 are the same, the depth of the G3 is 0.5-2.5 mm smaller than that of the G1, the tread N represents the width position of a tire driving surface, the distance between the upper end point 7 of the tire sidewall 9 and the N point is preferably 2-8 mm, the high-adhesiveness base rubber 2 is arranged below the wear-resistant tread rubber 1, the thickness of the high-adhesiveness base rubber is 1.2-2.5 mm, the thickness of the high-adhesiveness base rubber is gradually decreased at the positions of 2 a-2B and 2c is 0.6-1 times 2a, the thickness of the end point of the tread rubber is 8-12, and the distance between the end point TS of the tread rubber and the outer end point 4B is preferably 8-12, and the number and the maximum speed of the tire which can be driven by the measures can be improved;

The lower part of the high-adhesion base rubber 2 is provided with a spiral winding binding layer 3a and 3B, 8-12 nylon wires are used for winding the base rubber with the screw pitch of 8-10 mm to form 2 layers of flat-laid layers, the pitch of the nylon wires is 3a and 3B respectively, the widths of the 3a and 3B with uniform spacing are 2-6 mm larger than the width of the 4B, the tire under the binding layer is provided with two layers of X-shaped high-strength delamination-preventing carcass buffer layers 4a and 4B which are crossed, the difference set of the 4a and 4B is 8-16 mm, and the included angle formed by the two buffer layers is preferably 42-60 degrees;

The tire bearing composite body is formed by taking a tire bead 11 as a support at the lower part of a bead on the left side and the right side of the tire, taking a triangular rubber core 12 as a buffer main body to form a shape, taking a reinforcing steel wire layer 13 as a zero-air-pressure bearing part to form the tire bearing composite body, and is used for bearing all loads of an automobile in the running process, wherein the triangular rubber core 12 has the height SA of 0.5-0.65 times SDH, the Shore hardness of 80-90, the width of the triangular bottom of 6.2-10.9 mm, the width of the triangular top of 0.5-1.0 mm, the height C of the reinforcing steel wire layer 13 is 0.8-1.1 times SA, the radial distance from the lower edge to S is BH, the height is preferably 4-8 mm, the density is preferably 38-43E/50 mm, the thickness is set to be 1.1-1.45 mm, the radial height from the lower end point is set at the S, the preferred BH value is 5-8 mm,

A tire skeleton carcass layer 5 is arranged below the high-strength delamination-resistant carcass buffer layer 4B, the tire skeleton carcass layer 5 is reversely wrapped to a sidewall position along one tire bearing composite body consisting of a tire bead 11, a triangular rubber core 12 and a reinforcing steel wire layer 13, the axial height from the end point of the reversely wrapped tire to S is PLH, and the height is set to be 0.8-1.2 times SDH;

The lower part of the framework carcass layer 5 is provided with a sealing layer 6, a cavity 8 is formed at the tire sidewall position with the carcass layer 5, wherein the ultra-strong supporting performance rubber core 14 is used for filling, the hardness of the ultra-strong supporting performance rubber core 14 is selected to be 70-80A, the thickness RF1 of the ultra-strong supporting performance rubber core 14 at the outer end point position of 4B is positioned between 2.5-4.5 mm, the transverse distance RFS of the outer end point of 7-4B is preferably set to be 10-22 mm, the radial vertical distance RFH from the lower end point of the ultra-strong supporting performance rubber core 14 to S is preferably set to be 8-15 mm, the thickness of the maximum thickness position RF3 is set to be 5.0-9.5 mm, RF2 and RF4 are respectively set at the same position above and below the RF3 position, preferably RF 2=RF 3-1, and preferably RF 4=RF 3-1.5.

Example two

In connection with the description of the first embodiment, after the run-flat tire is manufactured according to the relevant parameters set in the first embodiment, the zero air pressure performance test is performed according to the GB/T30196-2013 standard, the tire noise test passes the real vehicle test, and specific test results are described below with reference to fig. 3 to 5, and with reference to cases 2, 6, 9, 11 and 12, and as illustrated in fig. 3: wherein PLH is 1, except that one or more parameter values of RIMH (mm), R1H (mm), RCH1 (mm), RCH3 (mm), RFH (mm), RFS (mm), RF1 (mm), RF3 (mm), SA (mm), C (times), zero air pressure result (min) are adjusted, whereas in fig. 4 and 5, PLH is adjusted first, and one or more of the above parameters are adjusted again, so that a corresponding noise value can be obtained;

the main explanation for this is: the relevant parameters in the corresponding structural positions in the first embodiment are substituted into the fig. 3,4 and 5 again, so that corresponding result parameters can be obtained, and the fact that the run-flat tire provided by the invention still can ensure sufficient supporting performance after the relevant parameters are changed, the tire is supported to continue to run for a certain distance, and intermittent abnormal sound caused by friction between the tire and a rim when the vehicle starts is reduced is proved.

To sum up: the tire profile design is started by optimizing the ratio of tire profile parameters and innovations of different structures, steel wire reinforcement is used as zero-pressure support, the difference parameter design of each part is optimized, the defect that the conventional run-flat tire is broken due to the problem of sinking under the condition of starting in winter or low-pressure can be overcome, and the tire profile design is particularly characterized in that the height proportion of the part below the zero radius of the tire profile, particularly the rim protection, is optimized, the structural shape of high-adhesion performance base rubber is limited, the tire performance is improved, the heat radiation capability in the tire driving process is ensured, the supporting capability of the tire under the condition of losing air pressure can be improved through the reinforcing steel wire layer when the whole tire is supported, the stress distribution of the tire bead position is changed by deformation of the tire bead position, and the broken abnormal noise generated by the friction between a tire bead opening and the rim is further eliminated.

The foregoing is merely illustrative and explanatory of the invention, as it is well within the scope of the invention as claimed, as it relates to various modifications, additions and substitutions for those skilled in the art, without departing from the inventive concept and without departing from the scope of the invention as defined in the accompanying claims.

In the description of the present specification, the descriptions of the terms "one embodiment," "example," "specific example," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The preferred embodiments of the invention disclosed above are intended only to assist in the explanation of the invention. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise form disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best understand and utilize the invention. The invention is limited only by the claims and the full scope and equivalents thereof.

Claims (8)

1. The run-flat tire capable of preventing abnormal sounds comprises a heat-resistant and wear-resistant tread rubber (1), a tire skeleton carcass layer (5), a tire bead (11) and a tire side wall (9), and is characterized in that high-adhesion base rubber (2), a binding layer (3), a buffer layer (4) and a sealing layer (6) are arranged between the heat-resistant and wear-resistant tread rubber (1) and the tire skeleton carcass layer (5), a cavity (8) is arranged in one inner position of the sealing layer (6) and the tire skeleton carcass layer (5) corresponding to the tire side wall (9), a super-strong supporting performance rubber core (14) is filled in the cavity (8), and a triangular rubber core (12) is arranged in the inner position corresponding to the tire bead (11);

the tire is characterized in that a reinforcing steel wire layer (13) is arranged at the middle position of the triangular rubber core (12) and the tire skeleton carcass layer (5), an anti-abrasion rubber layer (10) is arranged at the lower position of the tire side (9), and an upper endpoint (7), a lower joint surface endpoint and an inner endpoint are respectively arranged at the positions of the heat-resistant and abrasion-resistant tread rubber (1) corresponding to the rubber core (14) with super strong supporting performance.

2. The abnormal sound prevention run-flat tire according to claim 1, wherein the thickness of the high adhesion performance base rubber (2) is 1.2-2.5 mm, the high adhesion performance base rubber (2) is respectively provided with 2a,2b and 2c along the tire contour direction, the thickness 2a,2b and 2c of the high adhesion performance base rubber (2) is gradually decreased, and the thickness of the high adhesion performance base rubber (2) at the 2c position is 0.6-1 times the thickness of the high adhesion performance base rubber (2) at the 2a position.

3. The abnormal sound prevention run-flat tire according to claim 1, wherein the tie layer (3) is spirally wound with 8-12 nylon wires at a pitch of 8-10 mm to form flat layers 3a and 3B, the buffer layer (4) is respectively provided with 4a and 4B along the direction from the heat-resistant and wear-resistant tread rubber (1) to the tire carcass layer (5), the pitches of the flat layers 3a and 3B are uniform, and the widths of the flat layers 3a and 3B are 2-6 mm larger than the width of the 4B.

4. The abnormal sound prevention run-flat tire according to claim 1, wherein the hardness of the sealing layer (6) and the super strong supporting rubber core (14) of the tire carcass layer (5) at the side wall (9) is selected to be 70-80A, the thickness RF1 of the super strong supporting rubber core (14) at the outer end point of 4B is 2.5-4.5 mm, the transverse distance RFs from the upper end point (7) of the super strong supporting rubber core (14) to the outer end point of 4B is preferably set to be 10-22 mm, and the radial vertical distance RFH from the lower end point (7) of the super strong supporting rubber core (14) to S is set to be 8-15 mm.

5. The abnormal sound prevention run-flat tire according to claim 1, wherein the height SA of the triangular rubber core (12) is equal to 0.5 to 0.65 times SDH, the width of the bottom part of the triangular rubber core (12) is 6.2 to 10.9mm, the width of the top part of the triangular rubber core is 0.5 to 1.0mm, and the reinforcing steel wire layer (13) is arranged at the inner side of the triangular rubber core (12).

6. The abnormal sound prevention run-flat tire according to claim 5, wherein the reinforcing steel wire layer (13) has a height C of 0.8 to 1.1 times SA, a radial distance from the lower edge to S of BH, a height of 4 to 8mm, and a thickness of 1.1 to 1.45mm.

7. A run-flat tire against abnormal sounds according to claim 1, wherein said carcass ply (5) is turned up to the sidewall (9) along the reinforcing steel wire layer (13), the bead (11), the triangular core (12), the radial height from the turn-up end point to the S is PLH, the height is set to 0.8 to 1.2 times SDH, said sealing layer (6) is turned up to the outside of the bead (11) along the bead (11), and the radial distance LH from the end point to the S is set to 5 to 10mm.

8. A run-flat tyre against abnormal sounds according to claim 1, characterized in that said anti-wear layer (10) is wrapped up along the bead (11) to the inside of the profile, the radial height RCH2 from the upper end point (7) of the sidewall (9) to S, the radial height RCH1 from the lower joint end point to S position, RCH1 height being set to 21-28 mm, the radial height RCH2 being 10-20 mm greater than RCH1, the radial height from the inner end point to S being RCH3 and the height being 10-15 mm.