CN113246664A - Tyre for vehicle wheels - Google Patents
Tyre for vehicle wheels Download PDFInfo
- Publication number
- CN113246664A CN113246664A CN202110036665.8A CN202110036665A CN113246664A CN 113246664 A CN113246664 A CN 113246664A CN 202110036665 A CN202110036665 A CN 202110036665A CN 113246664 A CN113246664 A CN 113246664A
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- linear
- tire
- recess
- tire according
- linear protrusions
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C13/00—Tyre sidewalls; Protecting, decorating, marking, or the like, thereof
- B60C13/02—Arrangement of grooves or ribs
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Tires In General (AREA)
Abstract
The invention provides a tire, which is provided with a side wall part extending along the radial direction of the tire, wherein the side wall part is provided with a concave part on the outer surface, and the depth of the bottom of the concave part is gradually reduced towards the 1 st direction.
Description
Technical Field
The present invention relates to a tire.
Background
Conventionally, for example, a tire includes a sidewall portion extending in a tire radial direction, and the sidewall portion includes a convex portion on an outer surface (for example, patent document 1). Further, the design of the sidewall portion can be improved by contrast (contrast) generated at the edge of the convex portion.
However, the convex portion of the sidewall portion is formed by the concave portion of the inner surface of the mold. Further, air is likely to remain in the concave portion of the inner surface of the mold with respect to the flat portion and the convex portion of the inner surface of the mold, and therefore, the edge of the convex portion of the sidewall portion may not be accurately formed. In this case, the design of the sidewall portion may be degraded.
Prior art documents
Patent document
Japanese patent laid-open No. 2019-104384 publication No.
The object of the invention is therefore: provided is a tire capable of suppressing a reduction in the design of a side wall portion.
Disclosure of Invention
The tire includes a sidewall portion extending in a tire radial direction, the sidewall portion including a recessed portion on an outer surface, a bottom portion of the recessed portion being gradually shallower in a 1 st direction.
Drawings
Fig. 1 is a cross-sectional view of a main portion of a tire in a meridian plane of the tire according to an embodiment.
Fig. 2 is a side view of the tire according to the above embodiment.
Fig. 3 is an enlarged view of the region III of fig. 2.
Fig. 4 is an enlarged sectional view of a key portion along the line IV-IV in fig. 3.
Fig. 5 is an enlarged sectional view of a main portion along the line V-V in fig. 3.
Fig. 6 is an enlarged cross-sectional view of a main portion of a tire according to another embodiment.
Fig. 7 is an enlarged cross-sectional view of a main portion of a tire according to still another embodiment.
Description of the reference numerals
11 … tires, 1a … bead core, 1b … bead portion, 1c … tread portion, 1D … tire rotation axis, 1e … carcass portion, 1f … inner liner, 2 … sidewall portion, 2a … sidewall rubber, 2b … outer surface, 2c … decorative portion, 3 … recess, 3a … first end edge, 3b … second end edge, 3c … first end edge, 3D … second end edge, 3e … bottom, 3f … side portion, 3g … deepest position, 4 … linear protrusion, 4a … top, 4b … first side surface, 4c … second side surface, D1 … tire width direction, D2 … tire radial direction, D3 … tire circumferential direction, direction in which D4 … extends (tire 1 direction), S1 … equatorial plane, S2 … reference plane.
Detailed Description
Next, an embodiment of the tire will be described with reference to fig. 1 to 5. In the drawings (including fig. 6 and 7), the dimensional ratio does not necessarily match the actual dimensional ratio, and the dimensional ratios in the drawings do not necessarily match.
As shown in fig. 1, a 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 toward the outside in the tire radial direction D2. Further, the tire 1 includes: and a tread portion 1c connected to outer ends of the pair of side portions 2, 2 in the tire radial direction D2.
Further, although not particularly limited, in the present embodiment, the tire 1 is mounted on a rim (not shown). In the present embodiment, although not particularly limited, air is pressurized inside the tire 1. That is, in the present embodiment, the tire 1 is a pneumatic tire.
In each figure, the tire width direction D1 is: the tire radial direction D2, which is a direction parallel to the tire rotation axis 1D as the rotation center of the tire 1, is: the radial direction of the tire 1, the tire circumferential direction D3, is: around the direction of the tire rotation axis 1 d. The tire equatorial plane S1 is: a plane orthogonal to the tire rotation axis 1D and located at the center of the tire 1 in the tire width direction D1, and the tire meridian plane is: the plane including the tire rotation axis 1d is a plane orthogonal to the tire equatorial plane S1.
In the tire width direction D1, the inner side means: the side close to the tire equatorial plane S1, the outer side means: the side away from the tire equatorial plane S1. In the tire radial direction D2, the inner side means: the side close to the tire rotation axis 1d, the outer side means: the side away from the tire rotation axis 1 d.
The tire 1 includes: a carcass portion 1e bridged between the pair of bead cores 1a, 1 a; and an inner liner 1f disposed inside the carcass portion 1e and having an excellent function of blocking gas permeation in order to maintain air pressure. The carcass portion 1e and the liner 1f are disposed along the inner periphery of the tire so as to extend over the bead portion 1b, the sidewall portion 2, and the tread portion 1 c.
The sidewall portion 2 includes: and a side rubber 2a disposed on the outer side of the carcass portion 1e in the tire width direction D1. As shown in fig. 2, the side rubber 2a includes: and a decorative portion 2c disposed in a partial region of the outer surface 2 b. The region in which the decorative portion 2c is disposed is not particularly limited.
The decorative portion 2c includes a plurality of recesses 3 recessed in the tire width direction D1. In the present embodiment, the concave portions 3 are arranged so as to be aligned along the tire radial direction D2 and the tire circumferential direction D3, respectively, but the arrangement of the concave portions 3 is not particularly limited. For example, only 1 recess 3 may be provided.
As shown in fig. 3 to 5, in the present embodiment, the recess 3 is formed in a quadrilateral shape (parallelogram shape). Accordingly, the recess 3 includes: a 1 st edge 3a and a 2 nd edge 3b extending along the tire circumferential direction D3, and a 3 rd edge 3c and a 4 th edge 3D connecting end portions of the 1 st edge 3a and the 2 nd edge 3b to each other. The shape of the concave portion 3 is not particularly limited, and for example, the concave portion 3 may be circular, polygonal, or patterned (for example, flame shape, lightning shape, or the like).
The decorative portion 2c includes: a plurality of linear protrusions 4 protruding from the bottom 3e of the recess 3 and arranged side by side. In fig. 4 and 5 (including fig. 6 and 7), the broken line indicates the reference plane S2 of the outer surface 2b, and the two-dot chain line indicates the position of the bottom portion 3 e. The reference surface S2 of the outer surface 2b is: an imaginary plane (plane, curved plane) including all the edges 3a to 3d of the recess 3.
The linear protrusions 4 extend in a predetermined direction D4. The predetermined direction D4 is also referred to as "extending direction" and "1 st direction". In addition, the extending direction D4 is different for each recess 3.
For example, in the upper right and lower left recesses 3 in fig. 3, the extending direction D4 is the tire circumferential direction D3, and in the lower right and upper left recesses 3 in fig. 3, the extending direction D4 is the tire radial direction D2. The extending direction D4 may be, for example, a direction intersecting the tire circumferential direction D3, or may be, for example, a direction intersecting the tire radial direction D2.
As shown in fig. 4, the recess 3 includes a side portion 3f connecting the end edge 3a and the bottom portion 3 e. The side portion 3f of the recess 3 extends from the end edge 3a to a deepest position (hereinafter also referred to as "deepest position") 3g of the bottom portion 3e of the recess 3. That is, the boundary between the bottom 3e and the side 3f of the recess 3 is the deepest position 3 g. The side portion 3f of the recess 3 is formed to be curved.
The depth W1 of the bottom 3e of the recess 3 (the amount of recess from the reference surface S2 of the outer surface 2 b) becomes gradually shallower in the extending direction D4. The shallowest position of the bottom 3e of the recess 3 is an end edge 3b of the recess 3. That is, the bottom 3e of the recess 3 extends to the end edge 3b of the recess 3.
The amount W2 of projection of the linear projection 4 from the bottom 3e of the recess 3 gradually decreases in the extending direction D4. Accordingly, the depth (the amount of recess from the reference surface S2 of the outer surface 2 b) W3 of the top 4a of the linear protrusion 4 is the same over the entire length (not only completely the same, but also substantially the same in terms of design error, manufacturing error, and the like).
Thus, the position of the top 4a of the linear protrusion 4 is, over the entire length: a position recessed from the reference surface S2 of the outer surface 2 b. That is, the linear protrusions 4 are all disposed inside the recesses 3. The linear protrusions 4 are separated from the end edges 3a to 3d of the concave portion 3. In addition, although not particularly limited, in the present embodiment, the maximum value of the projection amount W2 of the linear convex portion 4 is larger than: the maximum value of the amount W3 of recess of the top 4a of the linear projection 4.
Further, although not particularly limited, the maximum value of the depression amount W1 of the concave portion 3 may be 0.2mm to 8.0 mm. The maximum value of the amount W2 of protrusion of the linear protrusion 4 may be 0.1mm to 7.9mm, although not particularly limited. The maximum value of the depression amount W3 at the top 4a of the linear projection 4 may be 0.1mm to 7.9mm, although not particularly limited.
As shown in fig. 5, the linear projection 4 is formed by the 1 st side surface 4b and the 2 nd side surface 4 c. The top 4a of the linear projection 4 is: and a corner portion formed by joining the 1 st side surface 4b and the 2 nd side surface 4 c.
Although not particularly limited, in the present embodiment, the amount W2 of projection of the linear protrusions 4 is smaller than the distance W4 between the top portions 4a and 4 a. The distance W4 between the top portions 4a, 4a of the linear protrusions 4 may be 0.2mm to 5.0mm, although not particularly limited.
As described above, the structure of the tire 1 according to the present embodiment will be described below with reference to the operation of the tire 1 according to the present embodiment.
First, the concave portion 3 of the sidewall 2 is formed by a convex portion of the inner surface of the mold. Further, since air is less likely to remain in the convex portion of the mold, the end edges 3a to 3d of the concave portion 3 can be easily and accurately molded. Further, since the linear convex portion 4 is separated from the end edges 3a to 3d of the concave portion 3, the end edges 3a to 3d of the concave portion 3 are not intermittent but continuously extended.
Therefore, light (e.g., sunlight or illumination light) is reflected by the sidewall portion 2, and thereby the contrast by the end edges 3a to 3d of the recessed portion 3 can be reliably generated. Thus, the contrast generated by the end edges 3a to 3d of the recessed portion 3 can improve the design of the sidewall portion 2.
Since the side portion 3f of the recess 3 is formed to be curved, the deepest position 3g, which is the boundary between the bottom portion 3e and the side portion 3f of the recess 3, is smoothly formed. Accordingly, it becomes difficult to produce contrast at an unnecessary position such as the deepest position 3 g.
The depth W1 of the concave portion 3 becomes gradually shallower in the extending direction D4, and the amount W2 of projection of the linear convex portion 4 becomes gradually smaller in the extending direction D4. Accordingly, the light is reflected by the sidewall portion 2, and thereby a gradation (gradation) can be generated by the bottom portion 3e of the concave portion 3 and the linear convex portion 4.
The direction of the gradual change by the bottom 3e of the concave portion 3 and the linear convex portion 4 is the same direction. Thus, the gradual change caused by the bottom portion 3e of the recessed portion 3 and the linear convex portion 4 can improve the design of the sidewall portion 2.
However, since the linear protrusion 4 is disposed entirely inside the recess 3, and the depth W3 of the top 4a of the linear protrusion 4 is the same over the entire length of the linear protrusion 4, it is difficult to distinguish at a glance: the amount W2 of projection of the linear protrusion 4 and the depth W1 of the bottom 3e of the recess 3 vary in the extending direction D4. On the other hand, since the gradual change due to the linear protrusions 4 and the bottom portions 3e of the concave portions 3 occurs, the design of the sidewall portion 2 can be effectively improved.
As described above, the tire 1 according to the present embodiment includes the sidewall 2 extending in the tire radial direction D2, the sidewall 2 includes the concave portion 3 on the outer surface 2b, and the depth W1 of the bottom portion 3e of the concave portion 3 becomes gradually shallower in the 1 st direction D4.
According to the above configuration, the sidewall 2 includes, on the outer surface 2 b: the concave portions 3 of the leading edges 3a to 3d are easily and accurately formed. Accordingly, since the contrasts due to the end edges 3a to 3d of the recessed portion 3 are easily and accurately generated, the reduction in the design of the sidewall portion 2 can be suppressed. The depth W1 of the bottom 3e of the recess 3 becomes gradually shallower in the 1 st direction D4. Accordingly, the bottom 3e of the recess 3 can be made gradual.
Further, in the tire 1 according to the present embodiment, the following configuration is adopted: the sidewall 2 further includes a plurality of linear protrusions 4 arranged in parallel and protruding from the bottom 3e of the recessed portion 3, and each of the plurality of linear protrusions 4 extends in the 1 st direction D4.
According to the above configuration, since the plurality of linear protrusions 4 are arranged side by side, the design of the sidewall portion 2 can be improved. Further, since the linear convex portion 4 extends in the 1 st direction D4, the linear convex portion 4 extends in a direction gradually changed by the bottom portion 3e of the concave portion 3.
Further, in the tire 1 according to the present embodiment, the following configuration is adopted: the linear protrusions 4 are separated from the end edges 3a to 3d of the recessed portion 3.
According to the above configuration, since the plurality of linear protrusions 4 are separated from the end edges 3a to 3d of the recessed portion 3, the end edges 3a to 3d of the recessed portion 3 extend continuously. Accordingly, the contrast can be reliably generated by the end edges 3a to 3d of the concave portion 3.
Further, in the tire 1 according to the present embodiment, the following configuration is adopted: the amount W2 of projection of the linear protrusions 4 from the bottom 3e is gradually reduced toward the 1 st direction D4.
According to the above configuration, since the amount W2 of projection of the linear protrusion 4 from the bottom 3e of the recess 3 is gradually reduced, the linear protrusion 4 can be gradually changed. Since the projected amount W2 decreases in the 1 st direction D4, the direction of the gradual change by the linear protrusions 4 is the same as the direction of the gradual change by the bottom 3e of the recess 3.
Further, in the tire 1 according to the present embodiment, the following configuration is adopted: the linear protrusion 4 is disposed entirely inside the recess 3, and the depth W3 of the top 4a of the linear protrusion 4 is the same over the entire length.
According to the above configuration, since the depth W3 of the top 4a of the linear protrusion 4 is the same, it is difficult to distinguish at a glance: the amount W2 of projection of the linear projection 4 and the depth W1 of the bottom 3e of the recess 3 vary in the 1 st direction D4. On the other hand, the gradual change due to the linear protrusions 4 and the bottom portions 3e of the recesses 3 can be generated.
Further, in the tire 1 according to the present embodiment, the following configuration is adopted: the recess 3 includes a side portion 3f extending from an end edge 3a to a deepest position 3g of the bottom portion 3e, and the side portion 3f is formed to be curved.
According to the above configuration, since the side portion 3f of the recess 3 is formed in a curved manner, the boundary between the side portion 3f and the bottom portion 3e of the recess 3 can be smoothly formed. Accordingly, it is difficult to generate: the contrast due to the deepest position 3g of the recess 3.
The tire 1 is not limited to the configuration of the above embodiment, and is not limited to the above operation and effect. It is needless to say that various modifications may be made to the tire 1 without departing from the scope of the invention. For example, 1 or more of the configurations, methods, and the like according to various modifications described below can be arbitrarily selected, and it is needless to say that the configurations, methods, and the like according to the above-described embodiments can be applied.
(1) In the tire 1 according to the above embodiment, the side portion 3f is configured to: is formed curved. However, the tire 1 is not limited to the above configuration, although the above configuration is preferable. For example, as shown in fig. 6, the side portion 3f may be configured as follows: is formed flat.
(2) In the tire 1 according to the above embodiment, the configuration is such that: the shallowest position of the bottom 3e of the recess 3 is an end edge 3b of the recess 3. However, the tire 1 is not limited to the above configuration. The following may be configured: for example, the shallowest position of the bottom portion 3e is a position recessed from the reference surface S2 of the outer surface 2b, and the recessed portion 3 includes a side portion extending from the end edge 3b to the shallowest position of the bottom portion 3 e.
(3) Further, in the tire 1 according to the above embodiment, the configuration is such that: the linear protrusions 4 extend in the extending direction (1 st direction) D4. However, the tire 1 is not limited to the above configuration, although the above configuration is preferable. The following may be configured: for example, each of the linear protrusions 4 extends in a direction intersecting the extending direction (1 st direction) D4.
(4) Further, in the tire 1 according to the above embodiment, the configuration is such that: the linear protrusions 4 are provided in parallel with 1 recess 3. However, the tire 1 is not limited to the above configuration, although the above configuration is preferable. The following may be configured: for example, 1 linear protrusion 4 is provided for 1 recess 3. Further, the present invention may be configured as follows: for example, the linear protrusions 4 are not provided for at least 1 concave portion 3.
(5) Further, in the tire 1 according to the above embodiment, the configuration is such that: the linear convex portion 4 is disposed entirely inside the concave portion 3. However, the tire 1 is not limited to the above configuration, although the above configuration is preferable. The following may be configured: for example, at least a part of the top portions 4a of the plurality of linear protrusions 4 protrudes from the recessed portion 3 (reference surface S2 of the outer surface 2 b). Further, the present invention may be configured as follows: for example, the positions of the top portions 4a of the plurality of linear protrusions 4 are at the same positions as the reference surface S2 of the outer surface 2b over the entire length.
(6) In the tire 1 according to the above embodiment, the plurality of linear protrusions 4 are configured such that: are spaced apart from the end edges 3a to 3d of the recess 3. However, the tire 1 is not limited to the above configuration, although the above configuration is preferable. For example, the end of the linear protrusion 4 may be configured as follows: connected to the end edges 3a to 3d of the recess 3.
(7) Further, in the tire 1 according to the above embodiment, the configuration is such that: the amount W2 of projection of the linear protrusions 4 from the bottom 3e gradually decreases in the 1 st direction D4. However, the tire 1 is not limited to the above configuration, although the above configuration is preferable. The following may be configured: for example, the amount of projection W2 of the plurality of linear protrusions 4 is the same over the entire length. Further, the present invention may be configured as follows: for example, the amount W2 of projection of the linear protrusions 4 gradually increases toward the 1 st direction D4.
(8) Further, in the tire 1 according to the above embodiment, the configuration is such that: the depth W3 of the top 4a of the linear protrusion 4 is the same over the entire length. However, the tire 1 is not limited to the above configuration, although the above configuration is preferable. For example, the following may be configured: the depth W3 of the top 4a of the linear protrusion 4 is different in the extending direction D4.
(9) In the tire 1 according to the above embodiment, the top portion 4a of the linear convex portion 4 is configured to: is a corner formed by joining the 1 st side surface 4b and the 2 nd side surface 4 c. However, the tire 1 is not limited to the above configuration. For example, the following may be configured: as shown in fig. 7, the top 4a of the linear projection 4 is a flat surface joined to the 1 st side surface 4b and the 2 nd side surface 4c, respectively.
Claims (10)
1. A tire having a sidewall portion extending in a tire radial direction, the sidewall portion having a concave portion on an outer surface,
the depth of the bottom of the recess becomes gradually shallower in the 1 st direction.
2. The tire according to claim 1,
the side wall portion includes: a plurality of linear protrusions protruding from the bottom of the recess and arranged side by side,
the linear protrusions extend in the 1 st direction.
3. The tire according to claim 2,
the linear protrusions are separated from the end edges of the recesses.
4. Tire according to claim 2 or 3,
the amount of projection of the linear projections from the bottom portion gradually decreases in the 1 st direction.
5. Tire according to claim 4,
the linear convex portion is disposed entirely inside the concave portion,
the depth of the top of the linear protrusion is the same over the entire length.
6. Tire according to any one of claims 1 to 3,
the recess is provided with: a side portion extending from the end edge to a deepest position of the bottom portion,
the side portion is formed curved.
7. Tire according to claim 2 or 3,
the maximum value of the amount of the linear protrusion protruding from the bottom of the recess is greater than: the maximum value of the depth of the top of the linear projection.
8. Tire according to claim 2 or 3,
the linear protrusion protrudes from the bottom of the recess by an amount less than: the distance between the tops of the adjacent linear protrusions.
9. Tire according to claim 2 or 3,
the linear convex portion includes: a 1 st side and a 2 nd side connected to the 1 st side,
the top of the linear convex part is as follows: and a corner portion formed by joining the 1 st side surface and the 2 nd side surface.
10. The tire according to claim 1,
the side wall portion includes, on an outer surface: a 1 st recess and a 2 nd recess connected to the 1 st recess,
the concave part is a 1 st concave part,
the depth of the bottom of the 2 nd recess becomes gradually shallower toward the 2 nd direction,
the sidewall portion further includes: a plurality of 1 st linear protrusions protruding from the bottom of the 1 st recessed portion and arranged side by side, and a plurality of 2 nd linear protrusions protruding from the bottom of the 2 nd recessed portion and arranged side by side,
the 1 st linear protrusions extend in the 1 st direction,
the plurality of 2 nd linear protrusions extend in the 2 nd direction,
the 1 st direction is different from the 2 nd direction.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2020020420A JP7445450B2 (en) | 2020-02-10 | 2020-02-10 | tire |
| JP2020-020420 | 2020-02-10 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113246664A true CN113246664A (en) | 2021-08-13 |
| CN113246664B CN113246664B (en) | 2023-02-24 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110036665.8A Active CN113246664B (en) | 2020-02-10 | 2021-01-12 | Tyre for vehicle wheels |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP7445450B2 (en) |
| CN (1) | CN113246664B (en) |
| DE (1) | DE102021101606A1 (en) |
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- 2020-02-10 JP JP2020020420A patent/JP7445450B2/en active Active
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- 2021-01-12 CN CN202110036665.8A patent/CN113246664B/en active Active
- 2021-01-26 DE DE102021101606.1A patent/DE102021101606A1/en active Pending
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| CN109397996A (en) * | 2017-08-17 | 2019-03-01 | 东洋橡胶工业株式会社 | Pneumatic tire |
| CN109466255A (en) * | 2017-09-08 | 2019-03-15 | 东洋橡胶工业株式会社 | Pneumatic tire |
| JP2019104384A (en) * | 2017-12-12 | 2019-06-27 | 株式会社ブリヂストン | Decorative body |
Also Published As
| Publication number | Publication date |
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| CN113246664B (en) | 2023-02-24 |
| JP7445450B2 (en) | 2024-03-07 |
| DE102021101606A1 (en) | 2021-08-12 |
| JP2021123310A (en) | 2021-08-30 |
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