CN211195725U

CN211195725U - Pneumatic tire capable of reducing rolling resistance

Info

Publication number: CN211195725U
Application number: CN201921809372.3U
Authority: CN
Inventors: 许俊; 陈华健
Original assignee: Anhui Giti Radial Tire Co Ltd
Current assignee: Anhui Giti Radial Tire Co Ltd
Priority date: 2019-10-25
Filing date: 2019-10-25
Publication date: 2020-08-07
Anticipated expiration: 2029-10-25

Abstract

The utility model discloses a can reduce rolling resistance's pneumatic tire, including inner liner, casing ply, first belted layer, shoulder portion and bead portion, the thickness of inner liner is 0.8mm ~ 1.2mm, the symmetry is provided with two shoulder reinforcement films between the inner liner of pneumatic tire both sides shoulder portion and the casing ply, has following relation between the width a of the shoulder reinforcement film of pneumatic tire one side and the width W1B after the flattening of first belted layer: a/W1B is more than or equal to 0.2 and less than or equal to 0.5; the weight of the tire is reduced by thinning the inner liner layer, so that the rolling resistance of the tire is reduced; the shoulder of tire is tensile volume the biggest when the shaping, can be because tensile volume too greatly loses the air-trapping ability when the inner liner is thinner, the utility model discloses set up shoulder reinforcement film between the inner liner of tire shoulder and casing ply, and optimize its position, guaranteed the normal air-trapping function of tire.

Description

Pneumatic tire capable of reducing rolling resistance

Technical Field

The utility model relates to a tire technical field, concretely relates to can reduce rolling resistance's pneumatic 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 carcass ply, an inner liner and a steel wire ring, the reduction of the rolling resistance of the tire can be realized by improving the tire tread formula, reducing the weight of the tire, optimizing the structural design of the tire and the like, in the prior art, the tire tread formula of the tire needs to be improved in order to reduce the rolling resistance of the tire, and the cost is higher; or, the inner liner thickness is reduced, and the air retention performance of the tire is reduced after the inner liner thickness is reduced.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides a can reduce rolling resistance's pneumatic tire reduces tire weight through the attenuate inner liner, and then reduces the rolling resistance of tire to set up shoulder reinforcement film between the inner liner of tire shoulder portion and casing ply, and optimize its position, guaranteed the air-trapping performance of tire.

In order to solve the technical problem, the utility model adopts the following technical scheme:

a pneumatic tire capable of reducing rolling resistance, comprising an inner liner, a carcass ply, a first belt layer, a shoulder portion and a bead portion, characterized in that: the thickness of inner liner is 0.8mm ~ 1.2mm, the symmetry is provided with two shoulder reinforcement films between the inner liner of pneumatic tire both sides shoulder and the ply, has following relation between the width a of the shoulder reinforcement film of pneumatic tire one side and the width W1B of first band layer:

0.2≤a/W1B≤0.5。

further, on any radial section of the pneumatic tire, the end point on one side of the first belt layer is a point A; the end point on the side close to the tire equatorial plane of the shoulder reinforcing rubber sheet close to the point A is a point B, the end point on the side close to the shoulder part is a point C, and the point on the upper surface of the shoulder reinforcing rubber sheet close to the point A is a point D, so that the points B, C and D have the following relations:

wherein

The arc length of the upper surface of the film was reinforced for the shoulder between points B and D,

the arc length of the upper surface of the film is reinforced at the shoulder between points C and D.

Further, the width W1B of the first belt layer is 150mm to 260 mm.

Further, the pneumatic tire further comprises a bead filler abrasion-resistant rubber and a triangular rubber which are arranged on the bead portion, the height HBF of the triangular rubber is SDH (0.5-0.6), the E point of the upper end point of the triangular rubber is higher than the F point of the upper end point of the bead filler abrasion-resistant rubber, and the radial height difference H of the two points is 5-10 mm.

Further, the ply turns up around the bead portion from the inner side in the tire axial direction toward the outer side in the tire axial direction to form a turn-up portion whose upper end point G radial height H1P is SDH ± 5mm, where SDH is the radial height from the widest point of the tire to the heel.

Furthermore, the bead part is provided with a steel wire ring, and the thickness of the overlapping part of the bead opening wear-resistant rubber and the steel wire ring in the radial direction is 1.2-1.8 mm.

Compared with the prior art, the utility model has the advantages that:

1. the weight of the tire is reduced by thinning the inner liner layer, so that the rolling resistance of the tire is reduced; the shoulder of tire is tensile volume the biggest when the shaping, can be because tensile volume too greatly loses the air-trapping ability when the inner liner is thinner, the utility model discloses set up shoulder reinforcement film between the inner liner of tire shoulder and casing ply, and optimize its position, guaranteed the normal air-trapping function of tire.

2. The height of the seam allowance abrasion-resistant rubber is reduced, the radial height of the upper end point of the seam allowance abrasion-resistant rubber is lower than that of the upper end point of the triangular rubber, the rubber amount of the tire side part participating in deformation is reduced, and the rolling resistance of the tire is reduced.

Drawings

FIG. 1 is a schematic structural view of a shoulder portion of the present invention;

fig. 2 is a schematic structural view of the bead unit 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.

As shown in fig. 1, a pneumatic tire capable of reducing rolling resistance includes an inner liner 1, a ply 2, a first belt layer 3, a shoulder portion 4 and a bead portion, the thickness of the inner liner is 0.8mm to 1.2mm, two shoulder reinforcing rubber sheets 5 are symmetrically arranged between the inner liner and the ply of the shoulder portions on both sides of the pneumatic tire, and the width a of the shoulder reinforcing rubber sheet on one side of the pneumatic tire and the width W1B of the first belt layer have the following relationship:

0.2≤a/W1B≤0.5。

the weight of the tire is reduced by thinning the inner liner layer, so that the rolling resistance of the tire is reduced; the tensile volume of child shoulder portion is the biggest when the shaping, can be because the excessive air-trapping ability that loses of tensile volume when the inner liner is thinner, the utility model discloses set up shoulder reinforcement film between the inner liner of tire shoulder portion and casing ply, can carry out the reinforcement to the thinner inner liner of child shoulder portion, prevent that gas from this position from leaking, guaranteed the normal air-trapping function of tire.

As shown in fig. 1, in any one radial section of the pneumatic tire, the first belt layer 3 side end point is a point a; the end point on the side close to the tire equatorial plane of the shoulder reinforcing rubber sheet close to the point A is a point B, the end point on the side close to the shoulder part is a point C, and the point on the upper surface of the shoulder reinforcing rubber sheet close to the point A is a point D, so that the points B, C and D have the following relations:

wherein

The existing manufacturing process of the tire causes the stretching amount of the shoulder part of the tire to be larger, the air retention performance of the shoulder part of the inner liner layer with a thinned inner liner layer is reduced after the shoulder part is stretched, and the air leakage of the tire is too fast.

On any radial section of the tire, the positions of two end points of the first belt ply correspond to the points of the tire shoulder which are stretched more severely, the shoulder reinforcing rubber sheet is arranged between the lining layer and the cord fabric, the two side end points of the first belt ply are used as the center to extend and attach to the outline directions of the two sides, the shoulder reinforcing rubber sheet can be arranged at the position where the stretching amount of the lining layer is maximum, the reinforcing effect of the shoulder reinforcing rubber sheet is improved, and the air storage performance of the tire is ensured.

The type of the rubber material of the shoulder reinforcing rubber sheet is the same as that of the cord fabric layer, and the binding force between the shoulder reinforcing rubber sheet and the cord fabric layer is large.

The width W1B of the first belt layer 3 is 150mm to 260 mm.

As shown in fig. 2, the pneumatic tire further comprises a bead filler 7 and a bead apex 6, wherein the bead filler is arranged on the bead portion, the height HBF of the bead apex is SDH (0.5 to 0.6), the upper end point E of the bead apex is higher than the end point F of the bead filler, and the radial height difference H between the two points is 5mm to 10 mm.

By reducing the height of the seam allowance abrasion-resistant rubber, the radial height of the upper end point of the seam allowance abrasion-resistant rubber is lower than that of the upper end point of the triangular rubber, the rubber amount of the tire side part participating in deformation is reduced, and the rolling resistance of the tire is reduced.

As shown in fig. 2, the ply 2 is turned up around the bead portion from the inner side in the tire axial direction toward the outer side in the tire axial direction to form a turn-up portion 21 having an upper end point G radial height H1P of SDH ± 5mm, where SDH is the radial height difference between the tire widest point and the bead heel.

As shown in fig. 2, the bead portion is provided with a bead ring 8, the thickness of the overlapping portion of the bead rim wear-resistant glue 7 and the bead ring in the radial direction is 1.2mm to 1.8mm, the bead rim wear-resistant glue is in direct contact with a rim to play a role in protecting the bead, and the safety performance of the tire is ensured by the thickness of the bead rim wear-resistant glue.

Comparative example 1: the thickness of the inner liner layer is 1.2mm, no shoulder reinforcing rubber sheet exists, and the height of the sidewall wear-resistant rubber is 55 mm.

Comparative example 2: the thickness of the inner liner layer is 1.2mm, no shoulder reinforcing rubber sheet exists, and the height of the sidewall wear-resistant rubber is 45 mm.

Comparative example 3: the thickness of the inner liner layer is 1.2mm, no shoulder reinforcing rubber sheet exists, and the height of the sidewall wear-resistant rubber is 35 mm.

Example 1: the thickness of the inner liner is 1.0mm, the width of the shoulder reinforcing rubber sheet is 40mm, and the height of the sidewall wear-resistant rubber is 55 mm.

Example 2: the thickness of the inner liner is 1.0mm, the width of the shoulder reinforcing rubber sheet is 40mm, and the height of the sidewall wear-resistant rubber is 45 mm.

Example 3: the thickness of the inner liner is 1.0mm, the width of the shoulder reinforcing rubber sheet is 40mm, and the height of the sidewall wear-resistant rubber is 35 mm.

In order to more intuitively illustrate the technical effect of the invention, the rolling resistance test was carried out by using the three groups of comparative examples and the three groups of examples, and the tire specification is 205/55R16 according to the standard ISO 28580; speed: 80 km/h; air pressure: 210 kpa; loading: single tire maximum load 80%; temperature: at 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, and then the air pressure is placed into equipment for rolling resistance testing.

And (3) test results:

the experimental result shows that under the condition of different heights of the sidewall abrasion-resistant rubber, the shoulder part is provided with the shoulder reinforcing rubber sheet, the thickness of the inner lining layer is reduced, and the rolling resistance of the tire is obviously reduced; in addition, the rolling resistance can also be reduced by reducing the height of the wear-resistant rubber of the sidewall; through the combination of the technical scheme of reducing the height of the wear-resistant rubber on the sidewall, thinning the thickness of the inner liner and fitting the shoulder reinforcing rubber sheet, the rolling resistance of the tire can be reduced by about 8 percent.

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

1. A pneumatic tire capable of reducing rolling resistance, comprising an inner liner (1), a carcass ply (2), a first belt layer (3), a shoulder portion (4) and a bead portion, characterized in that: the thickness of inner liner is 0.8mm ~ 1.2mm, the symmetry is provided with two shoulder reinforcement film (5) between the inner liner of pneumatic tire both sides shoulder and the ply, has following relation between the width a of the shoulder reinforcement film of pneumatic tire one side and the width W1B of first band layer:

0.2≤a/W1B≤0.5。

2. a pneumatic tire capable of reducing rolling resistance according to claim 1, wherein: on any radial section of the pneumatic tire, the end point on one side of the first belt layer (3) is a point A; the end point on the side close to the tire equatorial plane of the shoulder reinforcing rubber sheet close to the point A is a point B, the end point on the side close to the shoulder part is a point C, and the point on the upper surface of the shoulder reinforcing rubber sheet close to the point A is a point D, so that the points B, C and D have the following relations:

wherein

3. A pneumatic tire capable of reducing rolling resistance according to claim 1, wherein: the width W1B of the first belt layer (3) is 150mm to 260 mm.

4. A pneumatic tire capable of reducing rolling resistance according to claim 1, wherein: the pneumatic tire further comprises bead opening abrasion-resistant rubber (7) and triangular rubber (6), wherein the bead opening abrasion-resistant rubber (7) and the triangular rubber are arranged on the bead portion, the height HBF of the triangular rubber is SDH (0.5-0.6), the E point of the upper end point of the triangular rubber is higher than the F point of the upper end point of the bead opening abrasion-resistant rubber, and the radial height difference H of the two points is 5-10 mm.

5. A pneumatic tire capable of reducing rolling resistance according to claim 1, wherein: the cord fabric layer (2) is reversely wrapped around the bead portion from the inner side in the axial direction of the tire to the outer side in the axial direction of the tire to form a turn-up portion (21), the radial height H1P of the upper endpoint G of the turn-up portion is SDH +/-5 mm, wherein SDH is the radial height from the widest part of the tire to the heel of the tire.

6. A pneumatic tire capable of reducing rolling resistance according to claim 4, wherein: the bead part is provided with a bead ring (8), and the thickness of the overlapping part of the bead rim wear-resistant rubber (7) and the bead ring in the radial direction is 1.2-1.8 mm.