CN218505589U

CN218505589U - Pneumatic tire

Info

Publication number: CN218505589U
Application number: CN202222707199.4U
Authority: CN
Inventors: 小川耕平
Original assignee: Toyo Tire Corp
Current assignee: Toyo Tire Corp
Priority date: 2021-11-16
Filing date: 2022-10-14
Publication date: 2023-02-21
Anticipated expiration: 2032-10-14
Also published as: JP2023073636A; DE102022128824A1; DE102022128824B4

Abstract

The utility model provides a pneumatic tire, this pneumatic tire possess along the radial side wall portion that extends of tire, and the sidewall portion possesses the banding decorative area who extends along tire circumference at its surface, and decorative area possesses a plurality of first regions that the broken line that constitutes by many line segments of connecting with 80 ~ 110 angle and decorative area's outer fringe surrounds, and first region possesses respectively and extends and separate a plurality of first ridges of interval and range each other along the first direction.

Description

Pneumatic tire

Technical Field

The utility model relates to a pneumatic tire.

Background

Various belt-shaped tire components are wound around the outer circumferential surface of a building drum, and then expanded in a ring shape to form a green tire, and the green tire is vulcanized and molded to form a pneumatic tire. In the outer surface of the sidewall portion of the tire after vulcanization molding, irregularities are likely to occur locally at the joint portion between the winding start end and the winding end of the band-shaped tire component, and these irregularities cause a reduction in the appearance quality of the tire.

Conventionally, in order to make such local unevenness less noticeable, it is known to provide a decorative region on the outer surface of the sidewall portion. For example, patent document 1 below discloses a pneumatic tire in which a decorative region is formed by overlapping a first ridge group consisting of a plurality of ridges each extending in a radial direction, a second ridge group consisting of ridges of the same specification as the first ridge group, a third ridge group consisting of a plurality of ridges arranged concentrically with each other, and a fourth ridge group consisting of ridges of the same specification as the third ridge group. However, as the decorative region formed on the outer surface of the sidewall portion, many proposals have been made in addition to patent document 1, but further improvement is still desired.

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open publication No. 2011-37387

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a can be so that the unsmooth of the surface production of side wall portion is difficult to become apparent pneumatic tire when the tire shaping.

The utility model discloses a pneumatic tire possesses along the tire side portion of radial extension of tire, the sidewall portion possesses the banding decorative area who extends along tire circumference at its surface, decorative area possess by the broken line that constitutes with many line segments of 80 ~ 110 angle connection with a plurality of first regions that decorative area's outer fringe surrounds, first region possesses respectively and extends and separate a plurality of first ridges of interval and range each other along the first direction.

Drawings

Fig. 1 is a main part sectional view of a tire meridian plane of a pneumatic tire according to the present embodiment.

Fig. 2 is a front view of the pneumatic tire according to the present embodiment.

Fig. 3 is an enlarged view of the region III of fig. 2.

Fig. 4 is an enlarged view of the region III of fig. 2.

Fig. 5 is an enlarged view of the V region of fig. 3.

Fig. 6 is a cross-sectional view of the decorative region around the first ridge.

Fig. 7 is an enlarged view of a main portion of a pneumatic tire according to another embodiment.

Description of the reference numerals

1 \ 8230and pneumatic tires; 2 \ 8230and a sidewall part; 2 a\8230andside wall glue; 2b 8230a peripheral surface; 2c 8230a tire maximum width position; 3 8230where the decorative area is formed; 3a 8230while the inner periphery; 3b 8230and outer periphery; 3c 8230a first side end edge; 3 d\8230anda second side end edge; 4 \ 8230and a concave part; 31 a-31 f 8230and a first region; 32 \ 8230and a second area; 41 \ 8230a first ridge; 42 \ 8230and a second ridge; 310, 8230a fold line; 311, 8230and line segments; 311a, 311b, 8230a line segment; d1\8230andthe axial direction of the tire; d2, 8230and the radial direction of the tire; d3, 8230and the circumferential direction of the tire; d41\8230ina first direction; d42 8230in a second direction; d43 8230in the third direction; d44 \8230inthe fourth direction; s2 \ 8230and a reference surface of the outer surface.

Detailed Description

Hereinafter, an embodiment of the pneumatic tire will be described with reference to fig. 1 to 6. In each drawing (the same applies to fig. 7), the dimensional ratio in the drawing does not necessarily coincide with the actual dimensional ratio, and the dimensional ratios in the drawings do not necessarily coincide with each other.

As shown in fig. 1, a pneumatic tire 1 according to the present embodiment includes: a pair of

bead portions

1b, 1b having a bead core 1a; and a pair of

sidewall portions

2, 2 extending from each bead portion 1b outward in the tire radial direction D2. The pneumatic tire 1 further includes a tread portion 1c connected to outer ends of the pair of

side portions

2, 2 in the tire radial direction D2. Although not shown, various grooves such as circumferential grooves and lug grooves constituting a tread pattern are provided on the outer circumferential surface of the tread portion 1c.

In each figure, the tire axial direction D1 is a direction parallel to a tire rotation axis 1D (see fig. 2) which is a rotation center of the pneumatic tire 1, the tire radial direction D2 is a radial direction of the pneumatic tire 1, and the tire circumferential direction D3 is a direction around the tire rotation axis 1D. The tire equatorial plane S1 is a plane perpendicular to the tire rotation axis 1D and located at the center of the pneumatic tire 1 in the tire axial direction D1, and the tire meridian plane is a plane including the tire rotation axis 1D and perpendicular to the tire equatorial plane S1.

Further, in the tire axial direction D1, the inner side means a side close to the tire equatorial plane S1, and the outer side means a side far from the tire equatorial plane S1. In the tire radial direction D2, the inner side is a side close to the tire rotation axis 1D, and the outer side is a side far from the tire rotation axis 1D.

The pneumatic tire 1 includes: a carcass portion 1e which is bridged between the pair of

bead cores

1a, 1a; and an inner liner 1f disposed inside the carcass portion 1e and having an excellent function of preventing gas permeation for maintaining the gas pressure. The carcass portion 1e and the liner 1f are arranged along the inner periphery of the tire over the bead portion 1b, the sidewall portion 2, and the tread portion 1c.

The sidewall portion 2 includes a sidewall rubber 2a, and the sidewall rubber 2a is disposed outside the carcass portion 1e in the tire axial direction D1. As shown in fig. 2, the side rubber 2a includes a decorative region 3, and the decorative region 3 is disposed in a partial region of the outer surface 2 b. The decorative region 3 is formed in a constant region of the outer surface 2b of the sidewall 2 in the tire radial direction D2 including the tire maximum width position 2 c.

In the present embodiment, the decorative region 3 is formed in an arc shape extending in the tire circumferential direction D3. The decorative region 3 includes: an inner peripheral edge 3a and an outer peripheral edge 3b extending in the tire circumferential direction D3; and a first side end edge 3c and a second side end edge 3d that connect end portions of the inner peripheral edge 3a and the outer peripheral edge 3b to each other. In the present embodiment, the first side end edge 3c and the second side end edge 3d are formed in a zigzag shape, but the shapes of the first side end edge 3c and the second side end edge 3d are not particularly limited, and may be linear, for example.

The decorative region 3 may be formed only in a part of the sidewall portion 2 in the tire circumferential direction D3 as shown in fig. 2, or may be formed over the entire circumference of the sidewall portion 2 in the tire circumferential direction D3. In addition, the decorative region 3 may be formed in plural in the tire circumferential direction D3 of the sidewall portion 2. When a plurality of decorative regions 3 are formed, the decorative regions 3 are preferably arranged at equal intervals in the tire circumferential direction D3.

As shown in fig. 3 and 4, the decorative region 3 includes a plurality of first regions 31a to 31f and a plurality of second regions 32 other than the first regions 31a to 31 f. In fig. 4, the first ridge 41 and the second ridge 42, which will be described later, are not shown.

As shown in fig. 4, the first regions 31a to 31f are regions surrounded by a fold line 310 formed by a plurality of line segments 311 connected at an angle θ of 80 to 110 ° and the outer edge of the decorative region 3. The first regions 31a to 31f are regions on the side bent at the angle θ via the fold line 310. Here, the outer edges of the decorative region 3 refer to the inner edge 3a, the outer edge 3b, the first side edge 3c, and the second side edge 3d. The broken line 310 shown in fig. 4 is a virtual line for dividing the first regions 31a to 31f, and does not exist in an actual tire.

The first region 31a is a region surrounded by a fold line 310 formed by two line segments 311 and the inner peripheral edge 3 a. The first region 31b is a region surrounded by the inner peripheral edge 3a and a folding line 310 formed by three line segments 311. The first region 31c is a region surrounded by the outer peripheral edge 3b and a fold line 310 formed by two line segments 311. The first region 31d is a region surrounded by the outer peripheral edge 3b and a folding line 310 formed by three line segments 311. The first area 31e is an area surrounded by a folding line 310 formed by two line segments 311, the inner peripheral edge 3a, and the outer peripheral edge 3 b. The first region 31f is a region surrounded by a folding line 310 formed by two line segments 311, the outer peripheral edge 3b, and the first side edge 3c or the second side edge 3d.

As shown in fig. 5, the first regions 31a to 31f each include a plurality of first ridges 41 extending in the first direction D41 and arranged at intervals. The second region 32 includes a plurality of second ridges 42 extending in a second direction D42 different from the first direction D41 and arranged at intervals. The second direction D42 is inclined at 60 to 80 ° with respect to the first direction D41.

Fig. 6 is a sectional view taken from the decorative region 3 around the first ridge 41 by a plane perpendicular to the first direction D41. In fig. 6, a broken line indicates a reference surface S2 (also referred to as a reference contour) of the outer surface 2 b. In the present embodiment, the reference surface S2 of the outer surface 2b is located at the same position as the outer surface 2b of the sidewall 2 where the decorative region 3 is not formed in the tire axial direction D1.

The decorative region 3 includes a recess 4 recessed from the reference surface S2 of the outer surface 2 b. The recess 4 is formed over the entire decorative region 3. The depth of the recess 4 with respect to the reference surface S2 is, for example, 0.3 to 1.5mm.

The first ridge 41 is formed to protrude from the bottom of the recess 4. The position of the projecting end 41a of the first ridge 41 may be the same as the reference surface S2 of the outer surface 2b or may be a different position. Fig. 6 shows an example in which the position of the projecting end 41a of the first ridge 41 is a position recessed from the reference surface S2 of the outer surface 2 b.

The first ridge 41 is approximately triangular in cross section. Wherein the first ridge 41 may be a cross-sectional shape in which the vertex of the triangle is rounded. The protruding height H1 of the first ridge 41 from the bottom of the recess 4 is, for example, 0.2mm or more. The width W1 of the first ridge 41 is, for example, 0.1mm or more. The interval P1 between the first ridges 41 arranged in parallel is, for example, 0.6 to 1.0mm.

The second ridge 42 has the same sectional shape as the first ridge 41. Therefore, a detailed description of the second ridge 42 is omitted.

As shown in fig. 4, the plurality of line segments 311 are preferably configured by only a line segment 311a parallel to the third direction D43 and a line segment 311b parallel to the fourth direction D44 different from the third direction D43. With this structure, the design of the decorative region 3 becomes easy.

As described above, the pneumatic tire 1 according to the present embodiment includes the sidewall 2 extending in the tire radial direction D2, the sidewall 2 includes the belt-shaped decorative region 3 extending in the tire circumferential direction D3 on the outer surface 2b thereof, the decorative region 3 includes the plurality of first regions 31a to 31f surrounded by the outer edges 3a to 3D of the decorative region 3 and the fold line 310 formed by the plurality of line segments 311 connected at the angle θ of 80 to 110 °, and the first regions 31a to 31f include the plurality of first ridges 41 extending in the first direction D41 and arranged at intervals.

According to the pneumatic tire 1, the unevenness generated on the outer surface 2b of the sidewall 2 during tire molding is less conspicuous.

In addition, the pneumatic tire 1 according to the present embodiment is configured as follows: the decorative region 3 includes a second region 32 other than the first regions 31a to 31f, and the second region 32 includes a plurality of second ridges 42 extending in a second direction D42 different from the first direction D41 and arranged at intervals from each other.

With this structure, the unevenness generated on the outer surface 2b of the sidewall 2 during tire molding is less noticeable, and the appearance is improved.

In addition, the pneumatic tire 1 according to the present embodiment is configured as follows: the second direction D42 is inclined at 60 to 80 ° with respect to the first direction D41.

With this structure, the unevenness generated on the outer surface 2b of the sidewall 2 during tire molding is less noticeable.

In the pneumatic tire 1 according to the present embodiment, the plurality of line segments 311 are configured only by the line segment 311a parallel to the third direction D43 and the line segment 311b parallel to the fourth direction D44 different from the third direction D43.

With this configuration, the unevenness generated on the outer surface 2b of the sidewall 2 during tire molding is less noticeable, and the decorative region 3 can be easily designed.

The dimensional values, positional relationships, dimensional relationships, and the like described above are measured in a normal state in which the pneumatic tire 1 is mounted on a normal rim and filled with a normal internal pressure and no load. For example, the tire maximum width position 2c is: a position in the tire radial direction D2 at which the dimension in the tire axial direction D1 is the largest after removing structures such as patterns and characters protruding from the outer surface 2b of the sidewall 2 in a no-load state in which the pneumatic tire 1 is mounted on a regular rim and filled with regular internal pressure. The regular rim is: in a specification system including the specification to which the pneumatic tire 1 is subjected, the rim specified for each pneumatic tire 1 in accordance with the specification is, for example, a standard rim in the JATMA specification, or a "measurement rim" in the TRA and ETRTO specifications.

Further, the normal internal pressure is: in the specification system including the specification to which the pneumatic tire 1 conforms, the air pressure determined for each pneumatic tire 1 in accordance with each specification is the highest air pressure in the JATMA specification, the maximum value described in "tire load limit under various cold inflation pressures" in the TRA specification, and the "inflation pressure" in the ETRTO specification in the case of the truck bus tire and the light truck tire. The pressure of the tire for a passenger vehicle is usually 180kPa, but the pressure of the tire for an Extra Load or a reinfored tire is 220kPa.

The pneumatic tire 1 is not limited to the structure of the above embodiment, and is not limited to the above operation and effects. It is needless to say that various modifications may be made to the pneumatic tire 1 without departing from the scope of the present invention. For example, the respective configurations, the respective methods, and the like of the above-described embodiments may be arbitrarily adopted and combined, and it is needless to say that one or more of the configurations, the methods, and the like according to the following various modifications may be arbitrarily selected and used for the configurations, the methods, and the like of the above-described embodiments.

(1) The pneumatic tire 1 according to the above embodiment has the following configuration: the decorative region 3 includes a second region 32 other than the first regions 31a to 31f, and the second region 32 includes a plurality of second ridges 42 extending in a second direction D42 different from the first direction D41 and arranged at intervals from one another. However, the pneumatic tire 1 is not limited to such a structure. Even if the plurality of second ridges 42 are not provided in the second region 32, the effect of making the irregularities of the outer surface 2b of the sidewall portion 2 less noticeable can be obtained to some extent by the plurality of first ridges 41 provided in the first regions 31a to 31 f.

(2) The pneumatic tire 1 according to the above embodiment has the following configuration: the second direction D42 is inclined at 60 to 80 ° with respect to the first direction D41. However, the pneumatic tire 1 is not limited to such a structure. For example, as shown in fig. 7, the second direction D42 may be inclined at 90 ° with respect to the first direction D41. In the example shown in fig. 7, the fourth direction D44 is inclined at 90 ° to the third direction D43. The first direction D41 is inclined at 45 ° with respect to the third direction D43 and the fourth direction D44, respectively.

(3) In the pneumatic tire 1 according to the above-described embodiment, the plurality of line segments 311 are constituted only by the line segment 311a parallel to the third direction D43 and the line segment 311b parallel to the fourth direction D44 different from the third direction D43. However, the pneumatic tire 1 is not limited to such a structure. The plurality of line segments 311 may include line segments other than the line segment 311a and the line segment 311 b.

(4) In addition, as shown in fig. 7, the pneumatic tire 1 according to the present embodiment may be configured as follows: connecting the first ridge 41 and the second ridge 42 to each other at the ends. According to this configuration, when the first ridge 41 and the second ridge 42 are formed on the outer surface 2b of the sidewall portion 2 by cutting by laser processing or the like, the first ridge 41 and the second ridge 42 can be formed continuously, and therefore, the work efficiency is improved.

Claims

1. A pneumatic tire having a side wall portion extending in a tire radial direction,

the sidewall portion is provided on an outer surface thereof with a belt-like decorative region extending in the tire circumferential direction,

the decorative region includes a plurality of first regions surrounded by a fold line composed of a plurality of line segments connected at an angle of 80 to 110 DEG and an outer edge of the decorative region,

the first region includes a plurality of first ridges extending in a first direction and arranged at intervals from each other.

2. A pneumatic tire according to claim 1,

the decorative region is provided with a second region other than the first region,

the second region includes a plurality of second ridges extending in a second direction different from the first direction and arranged at intervals from each other.

3. A pneumatic tire according to claim 2,

the second direction is inclined at 60 to 80 ° with respect to the first direction.

4. A pneumatic tire according to claim 2,

the first and second ridges are connected to each other at ends.

5. A pneumatic tire according to claim 1,

the plurality of line segments are constituted only by line segments parallel to a third direction and line segments parallel to a fourth direction different from the third direction.

6. A pneumatic tire according to claim 2,

the second direction is inclined at 90 ° with respect to the first direction.

7. A pneumatic tire according to claim 6,

the plurality of line segments are constituted only by line segments parallel to a third direction and line segments parallel to a fourth direction different from the third direction,

the fourth direction is inclined at 90 ° with respect to the third direction.

8. A pneumatic tire according to claim 7,

the first direction is inclined at 45 ° with respect to the third direction and the fourth direction, respectively.