CN210733720U - Sidewall structure for low rolling resistance tire - Google Patents
Sidewall structure for low rolling resistance tire Download PDFInfo
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- CN210733720U CN210733720U CN201921562353.5U CN201921562353U CN210733720U CN 210733720 U CN210733720 U CN 210733720U CN 201921562353 U CN201921562353 U CN 201921562353U CN 210733720 U CN210733720 U CN 210733720U
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Abstract
The utility model discloses a side wall structure for low rolling resistance tire, including setting up the rim of a mouth wear-resistant glue and the apex of setting at the tire bead position in the tire both sides, rim of a mouth wear-resistant glue from the top down extension along the side wall profile, forms the handstand triangle-shaped structure that the upper end is wider, the lower extreme is narrower, the radial height of the upper extreme point A of rim of a mouth wear-resistant glue is less than the radial height of the upper extreme point D of apex, and the radial difference in height H of A point and D point is 20mm ~ 30mm, crosses the contained angle theta that two limits of the upper extreme point of rim of a mouth wear-resistant glue become is 15 ~ 30, through setting the rim of a mouth wear-resistant glue to the inverted triangle-shape, and optimize its radial height and cross the angle of two limits of the upper extreme point of rim wear-resistant glue, makes the radial height of the upper extreme point of rim of a mouth wear-resistant glue be less than the upper extreme, the rolling resistance of the tire is reduced.
Description
Technical Field
The utility model relates to a tire technical field, concretely relates to side wall structure for low rolling resistance tire.
Background
Since tires are viscoelastic bodies composed of rubber, steel wires and cords, deformation is necessarily accompanied in movement, and finally energy loss is generated in the form of heat due to deformation, and the energy loss per unit driving distance is called tire rolling resistance.
The tire mainly comprises a tire tread, a tire side, apex, a cap ply, a belt ply, a tire body, an inner lining and a steel wire ring, the parts of the tire rolling resistance are generally crown parts, tire side and bead openings, the reduction of the tire rolling resistance can be realized by improving the tire tread formula, reducing the tire weight, optimizing the tire structural design and other methods, in the prior art, the performance requirements of noise, abrasion, economy, controllability, tire wetland and the like of the tire are considered at the same time, and the reduction of the tire rolling resistance has a bottleneck under the condition of not changing the tire structure.
The upper end point of the bead wear-resistant rubber of the common tire in the prior art is higher than the upper end point of the bead apex, and the upper part of the bead apex is just in a tire flexing area, so that the common tire has more heat generation and larger energy consumption, and is extremely unfavorable for tire rolling resistance.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides a side wall structure for low rolling resistance tire sets up to triangle-shaped through gluing the rim of a river wear-resisting, and optimizes its radial height and cross the angle on two limits of the extreme point on the rim of a river wear-resisting, shifts out the tire flexure region with the rim of a river wear-resisting glue, reduces the rubber volume that the side wall position participated in the deformation, has reduced the rolling resistance of tire.
In order to solve the technical problem, the utility model adopts the following technical scheme:
the tire side structure for the low rolling resistance tire comprises bead wear-resistant glue arranged on two sides of the tire and apex arranged at a tire bead position, wherein the bead wear-resistant glue extends from top to bottom along the profile of the tire side to form an inverted triangle structure with a wider upper end and a narrower lower end, the radial height of an end point A on the bead wear-resistant glue is lower than that of an end point D on the apex, the radial height difference H between the point A and the point D is 20-30 mm, and an included angle theta formed by two edges passing through the end points on the bead wear-resistant glue is 15-30 degrees.
Further, the side wall structure still includes the child side glue, side wall glue and the wear-resisting glue of rim of a mouth set gradually from the top down along the side wall profile, the wear-resisting glue upper end of rim of a mouth bonds with the lower extreme of the side wall glue, the area S of the radial cross section of the wear-resisting glue of rim of a mouthrcArea S of radial cross section with sidewall rubberwThe ratio of the ratio is 9 to 14 percent.
Compared with the prior art, the utility model has the advantages that:
1. the bead wear-resistant glue is arranged to be in an inverted triangle shape, the radial height of the bead wear-resistant glue and the angles of two sides of the upper end point of the bead wear-resistant glue are optimized, the radial height of the upper end point of the bead wear-resistant glue is lower than the height of the upper end point of the triangle glue, the bead wear-resistant glue is moved out of a tire bending area, the rubber amount of the tire side part participating in deformation is reduced, and the rolling resistance of the tire is reduced.
2. The hysteresis loss of the wear-resisting gluey sizing material of rim of a mouth is big, and it is great to the rolling resistance contribution of tire, the utility model discloses the area of the wear-resisting gluey radial cross section of rim of a mouth of well tire is little, and the ratio of the wear-resisting gluey of rim of a mouth in the side wall reduces thereupon, and rolling resistance also can reduce thereupon.
Drawings
Fig. 1 is a schematic overall structure diagram of the present invention;
fig. 2 is the structural schematic diagram of the sidewall rubber and the bead wear-resistant rubber of the present invention.
Detailed Description
A preferred embodiment of the present invention will be described in detail below with reference to the accompanying drawings.
The tire mainly comprises a tire tread, a tire side, apex, a cap ply, a belt ply, a tire body, an inner lining and a steel wire ring, the parts of the tire rolling resistance are generally crown parts, tire side and bead openings, the reduction of the tire rolling resistance can be realized by improving the tire tread formula, reducing the tire weight, optimizing the tire structural design and other methods, in the prior art, the performance requirements of noise, abrasion, economy, controllability, tire wetland and the like of the tire are considered at the same time, and the reduction of the tire rolling resistance has a bottleneck under the condition of not changing the tire structure.
The upper end point of the bead wear-resistant rubber of the common tire is higher than that of the bead apex, and the upper part of the bead apex is just positioned in a tire flexing area, so that the common tire has more heat generation and higher energy consumption, and is extremely unfavorable for tire rolling resistance.
As shown in fig. 1-2, the utility model provides a side wall structure for low rolling resistance tire, including setting up the rim of a mouth abrasive rubber 10 in tire both sides and setting up the apex 30 at the tire bead position, the rim of a mouth abrasive rubber is along side wall profile from the top down extension, forms the handstand triangle-shaped structure of upper end broad, the lower extreme is narrower, the radial height that the radial height of rim of a mouth abrasive rubber 10 upper end point A is less than the radial height of apex D on the apex, and the radial difference in height H of A point and D point is 20mm ~ 30mm, crosses two limits AB, the contained angle theta that AC made of the wear-resisting extreme point on the rim of a mouth adhesive is 15 ~ 30.
Reducing the height of the upper end point of the seam allowance wear-resistant glue 10 to enable the upper end point A of the seam allowance wear-resistant glue to be lower than the upper end point D of the triangular glue; be the side wall region of warping above the extreme point on the triangle glue, the themogenesis is many, and the energy consumption is big, the utility model provides a parameter setting can shift out the region of warping with the wear-resisting glue of bead, reduces the side wall themogenesis.
Two edges passing through the end point of the bead wear-resistant glue are AB and AC, an included angle theta formed by the AB and the AC is 15-30 degrees, when theta is smaller than 15 degrees, the thickness value of the bead wear-resistant glue is too small, the purpose of protecting the bead cannot be achieved when the tire is in contact with a rim, when theta is too large, the size of a bonding part of the bead wear-resistant glue and the sidewall glue is too small, the bonding strength is not enough, the transition of the bead wear-resistant glue and the sidewall glue is not uniform during force transmission, and when theta is too large, the radial cross-sectional area of the bead wear-resistant glue is increased, so that the reduction of the rolling resistance of the tire is not facilitated; when the value of the included angle theta formed by two edges passing through the end points of the bead wear-resistant glue is set to be 15-30 degrees, the bead wear-resistant glue can protect the bead, the area of the radial section of the bead wear-resistant glue can be reduced, and the rolling resistance of the tire is reduced.
As shown in FIG. 1, the sidewall structure further includes sidewallsThe tire sidewall rubber and the bead wear-resistant rubber are sequentially arranged along the profile of the tire sidewall from top to bottom, the upper end of the bead wear-resistant rubber is bonded with the lower end of the tire sidewall rubber, and the radial cross-sectional area S of the bead wear-resistant rubberrcRadial cross-sectional area S of sidewall rubberwThe ratio of the ratio is 9 to 14 percent.
Since the tire is a viscoelastic body consisting of rubber, steel wires and cords, the movement is necessarily accompanied by deformation which ultimately generates energy losses in the form of heat which generate the rolling resistance F of the tireRDefining: energy loss (or energy consumption) per unit mileage, expressed as:
FR=Eloss/C=f(σ,ε,V,tanδ)/C
wherein ElossFor the energy loss of the tire, σ is the stress, ε is the strain, V is the tire volume, tan δ is the compound loss angle, and C is the rolling circumference.
The tire side is composed of sidewall rubber and bead wear-resistant rubber, the sidewall mainly bears the action of bending deformation and protects the tire side cord from being damaged, and the rubber material is characterized by low hardness, bending resistance and aging resistance; the hardness of the bead wear-resistant rubber is smaller than that of the bead apex and larger than that of the tire side, so that the transition of the bead apex and the tire side force is more stable, and the rubber material is characterized by high hardness and wear resistance. Because two kinds of sizing materials are different, its tan delta material loss angle is also different, because tan delta of the wear-resisting glue of rim of a mouth is big, when guaranteeing that the wear-resisting glue of rim of a mouth plays the transition effect, need reduce the quantity that the wear-resisting glue of rim of a mouth reduces and rolls and hinder, the utility model discloses the use amount of well wear-resisting glue of rim of a mouth is less, can reduce rolling of tire and hinder.
Comparative example 1:
the radial height difference H between the endpoint A of the seam allowance abrasion-resistant glue and the endpoint D of the triangular glue is 25mm, the included angle theta formed by two edges AB and AC of the endpoint of the seam allowance abrasion-resistant glue is 10 degrees, and the radial area of the seam allowance abrasion-resistant glue in the tire side accounts for 9.4 percent;
comparative example 2:
the radial height difference H between the endpoint A of the seam allowance abrasion-resistant glue and the endpoint D of the triangular glue is 25mm, the included angle theta formed by two edges AB and AC of the endpoint of the seam allowance abrasion-resistant glue is 35 degrees, and the radial area of the seam allowance abrasion-resistant glue in the tire side accounts for 13.2 percent;
comparative example 3:
the radial height difference H between the endpoint A of the seam allowance abrasion-resistant glue and the endpoint D of the triangular glue is 25mm, the included angle theta formed by two edges AB and AC of the endpoint of the seam allowance abrasion-resistant glue is 40 degrees, and the radial area of the seam allowance abrasion-resistant glue in the tire side accounts for 14.6 percent;
example 1:
the radial height difference H between the endpoint A of the seam allowance abrasion-resistant glue and the endpoint D of the triangular glue is 25mm, the included angle theta formed by two edges AB and AC of the endpoint of the seam allowance abrasion-resistant glue is 15 degrees, and the radial area of the seam allowance abrasion-resistant glue in the sidewall accounts for 10.5 percent;
example 2:
the radial height difference H between the endpoint A of the seam allowance abrasion-resistant glue and the endpoint D of the triangular glue is 25mm, the included angle theta formed by two edges AB and AC of the endpoint of the seam allowance abrasion-resistant glue is 23 degrees, and the radial area of the seam allowance abrasion-resistant glue in the sidewall accounts for 11.8 percent;
example 3:
the radial height difference H between the endpoint A of the seam allowance abrasion-resistant glue and the endpoint D of the triangular glue is 25mm, the included angle theta formed by two edges AB and AC of the endpoint of the seam allowance abrasion-resistant glue is 30 degrees, and the radial area of the seam allowance abrasion-resistant glue in the sidewall accounts for 12.5 percent;
in order to illustrate the technical effects of the present invention more intuitively, the tire rolling resistance test using the above three groups of comparative examples and three groups of examples, with reference to the standard ISO28580, has established a test for measuring the rolling resistance of a tire with the tire specification of 205/55R16, test speed: 80 km/h; air pressure: 210 kpa; loading: single tire maximum load 80%; the temperature is 25 ℃;
the testing process comprises the following steps: after the tire is inflated, the tire is parked in an environment temperature of 25 ℃ for at least 3 hours for heat balance; after heat balance, the air pressure is adjusted to the pressure testing air pressure, the air pressure is confirmed again after being adjusted for 10min, then the air pressure is loaded into equipment for rolling resistance testing, and the test results are as follows:
| comparative example 1 | Comparative example 2 | Comparative example 3 | Example 1 | Example 2 | Example 3 | |
| Radial height difference H between point A and point D | 25mm | 25mm | 25mm | 25mm | 25mm | 25mm |
| Included angle theta corresponding to end point of seam allowance abrasion- |
10° | 35° | 40° | 15° | 23° | 30° |
| Ratio of radial cross-sectional area of seam allowance wear-resistant glue | 9.4% | 13.2% | 14.6% | 10.5% | 11.8% | 12.5% |
| Tire rolling resistance FR | 39.96N | 42.75N | 43.34N | 40.37N | 41.23N | 42.12N |
According to the experimental result, the tire rolling resistance is reduced by changing the included angle of the two edges of the upper end point of the bead wearing rubber when the heights of the upper end points of the bead wearing rubber are the same.
When the included angle theta formed by the two edges AB and AC is smaller than 15 degrees, the thickness of the RC is too small, the purpose of protecting the bead opening cannot be achieved when the tire is in contact with the rim, and the result is that the endurance test is unqualified through the tire endurance test verification of the comparative example 1, and the specific test is as follows:
reference standard GB/T4502-: 120km/h, air pressure: 180kpa at 38 ℃;
the testing process comprises the following steps: the method comprises the steps of running for 4 hours under the condition that the single tire load is 85%, running mileage is 480km, running for 6 hours under the condition that the single tire load is 90%, running mileage is 1200km, running for 24 hours under the condition that the single tire load is 100%, running mileage is 4080km, stopping to check appearance, and finding out severe abrasion and cracking of the tire bead part and unqualified tire durability test.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, and any reference signs in the claims are not intended to be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (2)
1. The utility model provides a side wall structure for low rolling resistance tire, includes setting up rim of a river wear-resisting glue (10) and set up apex (30) at the tire bead position in tire both sides, its characterized in that: the seam allowance abrasion-resistant glue extends from top to bottom along the outline of the side wall to form an inverted triangle structure with a wider upper end and a narrower lower end, the radial height of an upper end point A of the seam allowance abrasion-resistant glue (10) is lower than that of an upper end point D of the triangle glue, the radial height difference H between the point A and the point D is 20-30 mm, and an included angle theta formed by two edges (AB, AC) passing through the upper end point of the seam allowance abrasion-resistant glue is 15-30 degrees.
2. The sidewall structure for a low rolling resistance tire according to claim 1, wherein: the side wall structure still includes child side glue (20), side wall glue and the wear-resisting glue of rim of a mouth set gradually along side wall profile from the top down, the wear-resisting glue upper end of rim of a mouth bonds with child side glue lower extreme, the radial cross-section' S of the wear-resisting glue of rim of a mouth area SrcArea S of radial cross section with sidewall rubberwThe ratio of the ratio is 9 to 14 percent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921562353.5U CN210733720U (en) | 2019-09-19 | 2019-09-19 | Sidewall structure for low rolling resistance tire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921562353.5U CN210733720U (en) | 2019-09-19 | 2019-09-19 | Sidewall structure for low rolling resistance tire |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210733720U true CN210733720U (en) | 2020-06-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921562353.5U Active CN210733720U (en) | 2019-09-19 | 2019-09-19 | Sidewall structure for low rolling resistance tire |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210733720U (en) |
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2019
- 2019-09-19 CN CN201921562353.5U patent/CN210733720U/en active Active
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