JP2010006135A - Vehicular wheel and tire wheel assembly - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicular wheel and a tire wheel assembly capable of further effectively restraining a temperature rise in a pneumatic tire caused when the pneumatic tire rolls on a road surface. <P>SOLUTION: This vehicular wheel 10A includes a projection part 20A projecting in the predetermined direction from a body part 12A of the vehicular wheel 10A. The projection part 20A is arranged on at least a partial surface of the body part 12A while installing the pneumatic tire 2 in the vehicular wheel 10A. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a vehicle wheel and a tire / wheel assembly to which a pneumatic tire is assembled, and more particularly to a vehicle wheel and a tire / wheel assembly that can effectively suppress a temperature increase of the pneumatic tire.

  The temperature rise of a pneumatic tire caused by the rolling of a pneumatic tire mounted on a vehicle such as an automobile changes the performance of the pneumatic tire due to deterioration of the rubber material forming the pneumatic tire. Or cause a decrease in service life. For this reason, generally the temperature rise of a pneumatic tire is not preferable except for special pneumatic tires such as a pneumatic tire for competition.

  In particular, in a run-flat tire that can travel even in a punctured state, that is, when the internal pressure is 0 kPa, the reinforcing rubber portion having a crescent-shaped cross section provided on the side portion of the pneumatic tire repeatedly undergoes large deformation and becomes high temperature. Therefore, a pneumatic tire is known in which a plurality of fin-like protrusions are provided on the surface of the side portion of the pneumatic tire (for example, Patent Document 1).

According to such a pneumatic tire, the side portion of the pneumatic tire is cooled by the turbulent flow caused by the fin-like protrusions rotated by the traveling of the vehicle equipped with the pneumatic tire.
WO 2007/032405 (page 9, FIG. 8)

  However, the conventional pneumatic tire described above has the following problems. That is, the plurality of fin-like protrusions provided on the surface of the side portion of the pneumatic tire cannot sufficiently cool the heated pneumatic tire, and there is room for improvement in suppressing the temperature rise of the pneumatic tire. was there.

  Therefore, the present invention has been made in view of such a situation, and a vehicle wheel and a tire that can more effectively suppress the temperature increase of the pneumatic tire caused by the pneumatic tire rolling on the road surface. -It aims at providing a wheel assembly.

  In order to solve the above-described problems, the present invention has the following features. First, a first feature of the present invention is a vehicle wheel (for example, a vehicle wheel 10A) to which a pneumatic tire (pneumatic tire 2) is assembled, and the vehicle wheel main body (for example, main body 12A). ) Projecting in a predetermined direction (for example, a projecting portion 20A), and the projecting portion is provided on at least a part of the surface of the main body when the pneumatic tire is assembled to the vehicle wheel. This is the gist.

  According to such a vehicle wheel, the projecting portion blocks the airflow flowing on the surface of the main body portion. The airflow flows over the protrusion, and flows into the surface of the main body as a downward flow behind the protrusion with respect to the rotation direction of the vehicle wheel.

  Therefore, when the air flow flows into the warm air layer on the surface of the main body portion, turbulent flow is generated on the surface of the main body portion, and the temperature rise on the surface of the main body portion is suppressed. That is, the air flow can suppress the temperature rise of the surface of the main body portion, so that the temperature rise of the pneumatic tire caused by the pneumatic tire rolling on the road surface can be more effectively suppressed.

  The second feature of the present invention relates to the first feature of the present invention, and is characterized in that the protruding portion is provided on the surface of the main body portion in contact with outside air.

  A third feature of the present invention relates to the first feature of the present invention, wherein the main body portion includes a rim flange portion (for example, a rim flange portion 14B) for locking the bead portion (bead portion 4) of the pneumatic tire. Inclusion is included.

  A fourth feature of the present invention relates to any one of the first to third features of the present invention, wherein the protrusion is along a direction substantially orthogonal to the rotational direction of the vehicle wheel mounted on the vehicle. The main point is that the fins extend.

  A fifth feature of the present invention relates to any one of the first to fourth features of the present invention, and is summarized in that a plurality of protrusions are provided along the circumferential direction of the vehicle wheel.

  A sixth feature of the present invention relates to the fifth feature of the present invention, and is characterized in that the protrusions are provided at predetermined intervals.

  A seventh feature of the present invention relates to the sixth feature of the present invention, wherein the interval between the protrusions is a distance p, and the distance from the surface of the main body to the tip of the protrusion is a height h. The gist of p and height h is that the relationship of 1.0 ≦ p / h ≦ 50.0 is satisfied. Preferably, the distance p and the height h satisfy a relationship of 2.0 ≦ p / h ≦ 24.0.

  The eighth feature of the present invention relates to the sixth or seventh feature of the present invention, wherein the interval between the projecting portions is the interval p, and the width of the projecting portion along the circumferential direction of the vehicle wheel is the width w. The distance p and the width w satisfy the relationship of 1.0 ≦ (p−w) /w≦100.0.

  A ninth feature of the present invention relates to any one of the fourth to eighth features of the present invention, wherein the protrusion has a front wall portion (for example, the front wall portion 20a) substantially orthogonal to the rotation direction. The gist of the angle formed by the main body portion and the front wall portion (extension direction angle (θ)) is 70 degrees to 110 degrees.

  A tenth feature of the present invention relates to the ninth feature of the present invention, and the angle of the vehicle wheel, which is a surface orthogonal to the extending direction of the axle on which the vehicle wheel is mounted, is 70 degrees to It is 110 degrees.

  An eleventh feature of the present invention relates to the ninth feature of the present invention, wherein the angle of the vehicle wheel along the direction of extension of the axle to which the vehicle wheel is attached is 70 to 110 degrees. It is characterized by being.

  A twelfth feature of the present invention relates to any one of the first to eleventh features of the present invention, wherein the main body portion is a disc-shaped disc portion (for example, a disc portion 16A) including an axle attached portion to which an axle is attached. And the protrusion is provided on the disk portion.

  A thirteenth feature of the present invention relates to any one of the third to eleventh features of the present invention, wherein the protruding portion is provided on a rim flange portion located on the opposite side to the side where the bead portion is locked. The gist.

  A fourteenth feature of the present invention relates to any one of the first to eleventh features of the present invention, wherein the main body includes a disk-shaped disc portion including an axle attached portion to which an axle is attached, and air from the disc portion. It has an annular rim portion (for example, rim portion 18C) extending along the tread width direction of the tire, and the protruding portion protrudes radially inward of the rim portion.

  A fifteenth feature of the present invention is a tire / wheel assembly (for example, tire / wheel assembly) including a pneumatic tire (pneumatic tire 2) and a vehicle wheel (for example, the vehicle wheel 10A) to which the pneumatic tire is assembled. 1A), the vehicle wheel includes a protruding portion (for example, a protruding portion 20A) that protrudes in a predetermined direction from a main body portion (for example, the main body portion 12A) of the vehicle wheel. The gist of the invention is that it is provided on at least a part of the surface of the main body in a state where the pneumatic tire is assembled to the vehicle wheel.

  A sixteenth feature of the present invention relates to any one of the second to tenth features of the present invention, wherein the tire / wheel assembly (for example, the tire / wheel assembly 1A) includes any vehicle wheel (for example, The vehicle wheel 10A) is provided.

  According to the features of the present invention, it is possible to provide a vehicle wheel and a tire / wheel assembly that can more effectively suppress the temperature rise of the pneumatic tire caused by the pneumatic tire rolling on the road surface.

  Next, an embodiment according to the present invention will be described. Specifically, in the first to fifth embodiments, embodiments in which the arrangement and shape of the protrusions are different will be described.

  In the following description of the drawings, the same or similar parts are denoted by the same or similar reference numerals. However, it should be noted that the drawings are schematic and ratios of dimensions and the like are different from actual ones.

  Accordingly, specific dimensions and the like should be determined in consideration of the following description. Moreover, it is a matter of course that portions having different dimensional relationships and ratios are included between the drawings.

[First embodiment]
In the following first embodiment, (1) the structure of the tire / wheel assembly, (2) the structure of the protrusion, (3) the flow of air, and (4) the action / effect will be described.

(1) Configuration of Tire / Wheel Assembly First, the configuration of the tire / wheel assembly according to the first embodiment will be described with reference to the drawings. FIG. 1 is a partially sectional perspective view showing the tire / wheel assembly according to the first embodiment. FIG. 2 is a cross-sectional view (A-A cross-sectional view of FIG. 1) showing the tire / wheel assembly according to the first embodiment.

  As shown in FIG. 1, the tire / wheel assembly 1A includes a pneumatic tire 2 and a vehicle wheel 10A. The vehicle wheel 10 </ b> A is assembled to the pneumatic tire 2.

  As shown in FIG. 2, the main body 12A includes a disc-shaped disc portion 16A including an axle attached portion to which an axle is attached, a rim flange portion 14 that engages the bead portion 4 of the pneumatic tire 2, and a disc portion 16A. And an annular rim portion 18 extending along the tread width direction of the pneumatic tire 2.

  The vehicle wheel 10A includes a protruding portion 20A that protrudes in a predetermined direction from the main body portion 12A of the vehicle wheel 10A. Specifically, the vehicle wheel 10A includes a protruding portion 20A that protrudes from the disc portion 16A of the main body portion 12A toward the vehicle outer side.

  The protruding portion 20A is provided on at least a part of the surface of the main body 12, specifically on the outer surface of the disk portion 16A that comes into contact with the outside air when the pneumatic tire 2 is assembled to the vehicle wheel 10A. It is done. The projecting portion 20A is a fin-like shape extending linearly along a direction substantially orthogonal to the rotation direction of the vehicle wheel 10A mounted on the vehicle, specifically, along the radial direction of the vehicle wheel 10A. Has a shape. Further, a plurality of protrusions 20A are provided at predetermined intervals along the circumferential direction of the vehicle wheel 10A.

(2) Configuration of Protrusion Next, the configuration of the above-described protrusion 20A will be described with reference to the drawings. 3 is a perspective view showing a part of the protruding portion 20A according to the first embodiment, and FIG. 4 is a cross-sectional view showing the protruding portion 20A according to the first embodiment (cross-sectional view taken along line BB in FIG. 3). It is.

  As shown in FIG. 3, when the interval between the protrusions 20A is the interval p, and the distance from the surface of the main body 12A to the tip of the protrusion 20A is the height h, the interval p and the height h are 1 The relationship of 0 ≦ p / h ≦ 50.0 is satisfied. When the width of the protruding portion 20A along the circumferential direction of the vehicle wheel 10A is defined as the width w, the interval p and the width w have a relationship of 1.0 ≦ (p−w) /w≦100.0. Satisfied. In addition, the space | interval p shows the distance from the center of one protrusion part 20A to the center of the adjacent protrusion part 20A in the surface of the main-body part 12A.

  In particular, the distance p and the height h preferably satisfy the relationship of 2.0 ≦ p / h ≦ 24.0, and may be set to the relationship of 10.0 ≦ p / h ≦ 20.0. It is more preferable that the relationship is set to 4.0 ≦ (p−w) /w≦39.0.

 The protruding portion 20A has a front wall portion 20a that is substantially orthogonal to the rotational direction of the vehicle wheel 10A. The extending direction angle (θ) formed by the main body 12A and the front wall portion 20a is 70 degrees to 110 degrees. Specifically, in the cross section of the vehicle wheel 10A along the extending direction of the axle to which the vehicle wheel 10A is attached, the extending direction angle (θ) formed by the main body portion 12A and the front wall portion 20a is 70. Degrees to 110 degrees.

(3) Air Flow Next, the air flow over the protrusion 20A according to the first embodiment will be described with reference to the drawings. FIG. 4 is a view for explaining the flow of air over the protrusion 20A according to the first embodiment.

  As shown in FIG. 4, the airflow flowing on the surface of the main body portion 12A gets over the plurality of protrusions 20A. Specifically, the air flow S1 generated along with the rotation of the vehicle wheel 10A is blocked by the protrusion 20A. The air flow S1 gets over the edge portion E on the front side with respect to the rotation direction of the vehicle wheel 10A of the protrusion 20A. The air flow S1 overcoming the protruding portion 20A flows into the surface of the main body portion 12A as a downward flow on the rear side of the protruding portion 20A with respect to the rotation direction of the vehicle wheel 10A, and travels toward the adjacent protruding portion 20A.

  At this time, the fluid S2 staying on the rear side of the protruding portion 20A with respect to the rotation direction of the vehicle wheel 10A takes the heat staying on the rear side and joins the air flow S1. On the other hand, with respect to the rotation direction of the vehicle wheel 10A of the adjacent protruding portion 20A, the fluid S3 staying on the front side of the protruding portion 20A takes the heat staying on the front side and rejoins the air flow S1.

  Thus, the air flow S1 flows into the surface of the main body 12A as a downward flow on the rear side of the protrusion 20A with respect to the rotation direction of the vehicle wheel 10A of the protrusion 20A. Further, the air flow S1 merges with the fluids S2 and S3 that have deprived the surface of the main body 12A.

(4) Action / Effect As described above, according to the first embodiment, the protrusion 20A provided on the surface of the main body 12A blocks the air flow S1 flowing through the main body 12A. The air flow S1 flows so as to get over the protrusion 20A, and flows into the surface of the main body 12A as a downward flow behind the protrusion 20A with respect to the rotation direction of the vehicle wheel 10A.

  Therefore, when the air flow S1 flows into the warm air layer on the surface of the main body portion 12A, a turbulent flow is generated on the surface of the main body portion 12A, and the temperature rise on the surface of the main body portion 12A can be suppressed. That is, the air flow S1 can suppress the temperature rise of the surface of the main-body part 12A, and can suppress effectively the temperature rise of the pneumatic tire 2 resulting from the pneumatic tire 2 rolling on a road surface.

  Further, for example, in a run flat tire, a reinforcing rubber portion having a crescent-shaped cross section provided in a side portion of the pneumatic tire repeatedly undergoes a large deformation and becomes a high temperature. Can be applied. That is, also in the run-flat tire, the air flow S1 can effectively suppress the temperature increase of the pneumatic tire by suppressing the temperature increase of the surface of the main body.

  In the first embodiment, since the protrusion 20A is provided on the main body 12A that comes into contact with the outside air, new outside air easily flows into the surface of the main body 12A as the air flow S1 as the vehicle wheel 10A rotates. . Therefore, the temperature rise of the surface of the main body 12A can be further suppressed.

  In the first embodiment, the protrusion 20A has a fin-like shape extending along the radial direction of the vehicle wheel 10A, which is a direction substantially orthogonal to the rotation direction of the vehicle wheel 10A. For this reason, the protrusion 20A further blocks the air flow S1 flowing through the main body 12A. Further, the air flow S1 is more likely to rise in the vertical direction from the surface of the main body 12A by the protrusion 20A.

  In the first embodiment, a plurality of protrusions 20A are provided along the circumferential direction of the vehicle wheel 10A. For this reason, a turbulent flow is generated on the surface of the main body 12A on the rear side of each protrusion 20A with respect to the rotation direction of the vehicle wheel 10A. That is, since generation | occurrence | production of the air flow S1 which flows into the surface of the main-body part 12A is accelerated | stimulated, the temperature rise of the surface of the main-body part 12A can further be suppressed.

  In the first embodiment, the protrusions 20A are provided at predetermined intervals. For this reason, the air flow S1 flowing into the surface of the main body portion 12A is generated at predetermined intervals without being concentrated on the local portion, and the temperature rise on the surface of the main body portion 12A can be reduced over a wide range.

  In 1st Embodiment, the height h of 20 A of protrusion parts is 0.5 mm or more and 20 mm or less, and the width w of 20 A of protrusion parts is 0.5 mm or more and 10 mm or less. For this reason, the protrusion 20A further blocks the air flow S1 flowing through the main body 12A. The air flow S1 is more likely to rise in the vertical direction with respect to the surface of the main body 12A by the protrusion 20A. As a result, the air flow S1 further flows into the surface of the main body 12A as a downward flow on the rear side of the main body 12A with respect to the rotation direction of the vehicle wheel 10A. That is, the air flow S1 further flows into the warm air layer on the surface of the main body portion 12A, thereby further suppressing the temperature rise on the surface of the main body portion 12A.

  In the first embodiment, the ratio of the height h to the interval p (p / h) is greater than 1.0. For this reason, the air (so-called downward flow) that passes over the protrusion 20A and flows in a direction substantially perpendicular to the surface of the main body 12A is more likely to flow into the surface of the main body 12A between the protrusions 20A. The temperature rise can be further suppressed.

  On the other hand, the value (p / h) of the ratio of the height h to the interval p is smaller than 50.0. For this reason, generation | occurrence | production of the air (what is called a downward flow) which passes over the protrusion part 20A and flows in a substantially right angle direction with respect to the main-body part 12A increases with respect to a thermal radiation area, and further suppresses the temperature rise of the main-body part 12A. it can.

  In the first embodiment, the value of the ratio of the width w to the interval p and the width w ((p−w) / w) is greater than 1.0. For this reason, the temperature rise of 12 A of main-body parts is suppressed, without the surface area of protrusion part 20A with respect to a thermal radiation area becoming equal.

  On the other hand, the value of the ratio of the width w to the interval p and the width w ((p−w) / w) is smaller than 100.0. For this reason, generation | occurrence | production of the air (what is called a downward flow) which passes over protrusion part 20A and flows in a substantially right angle direction with respect to the surface of main-body part 12A increases with respect to a thermal radiation area, and further suppresses the temperature rise of main-body part 12A. be able to.

  In the first embodiment, the extending direction angle (θa) is set in a range of 70 ° ≦ θa ≦ 110 °. For this reason, the air flow S1 is more likely to rise along the vertical direction from the surface of the main body 12A by the protrusion 20A. As a result, the air flow S1 further flows into the surface of the main body 12A as a downward flow on the rear side of the protrusion 20A with respect to the rotation direction of the vehicle wheel 10A. Can be suppressed.

  In the first embodiment, the protrusion 20A is set to have a relationship of 1.0 ≦ p / h ≦ 50.0 and 1.0 ≦ (p−w) /w≦100.0. For this reason, the air flow S1 is further likely to rise in the vertical direction from the surface of the main body 12A by the protrusion 20A. Further, the air flow S1 flowing into the surface of the main body portion 12A is generated at predetermined intervals without being concentrated on the local portion, and the temperature rise on the surface of the main body portion 12A can be reduced over a wide range.

  In the first embodiment, the protruding portion 20A is provided on the disk portion 16A of the main body portion 12A. For this reason, the disk portion 16A has a disk shape and is easily provided with the protruding portion 20A, and since the ratio of the surface area of the main body portion 12A in contact with the outside air is high, the temperature rise on the surface of the main body portion 12A can be reduced in a wide range.

[Second Embodiment]
In the first embodiment described above, the tire / wheel assembly including the protrusion provided on the disk portion has been described. However, in the following second embodiment, the tire / wheel assembly including the protrusion provided on the rim flange portion. Will be described. However, in the second embodiment, points different from the first embodiment will be described, and redundant description will be omitted. In the drawings of the second embodiment below, the same parts as those in the tire / wheel assembly according to the first embodiment described above are denoted by the same reference numerals.

  In the following second embodiment, (1) the configuration of the tire / wheel assembly, and (2) the action / effect will be described.

(1) Configuration of Tire / Wheel Assembly FIG. 5 is a partial cross-sectional perspective view of the tire / wheel assembly according to the second embodiment. FIG. 6 is a cross-sectional view (CC cross-sectional view of FIG. 5) showing the tire / wheel assembly according to the second embodiment.

  As shown in FIGS. 5 and 6, the tire / wheel assembly 1B includes a pneumatic tire 2 and a vehicle wheel 10B. The vehicle wheel 10B includes a protruding portion 20B that protrudes from the rim flange portion 14B of the main body portion 12B toward the extending direction of the axle.

  The protruding portion 20B is provided on the surface of the main body portion 12B that comes into contact with the outside air, that is, on the rim flange portion 14B located on the opposite side to the side that holds the bead portion 4. The protruding portion 20B has a fin-like shape extending linearly along the radial direction of the vehicle wheel 10B, which is a direction substantially orthogonal to the rotation direction of the vehicle wheel 10B mounted on the vehicle. Further, a plurality of protrusions 20B are provided at predetermined intervals along the circumferential direction of the vehicle wheel 10B.

(2) Action / Effect In the second embodiment, the protruding portion 20B is provided on the rim flange portion 14B located on the side opposite to the side where the bead portion 4 is locked. For this reason, the protruding portion 20B is provided in the main body portion 12B on the surface of the pneumatic tire 2 in contact with the road surface, that is, a portion close to the source of the temperature rise. Therefore, the air flow flowing into the surface of the rim flange portion 14B by the protrusion 20B is a portion close to the source of the temperature increase of the pneumatic tire 2, and the temperature increase can be suppressed.

  Further, for example, even in a run-flat tire, the present embodiment can be applied and the protrusion 20B can be provided on the rim flange portion 14B in the main body 12B. Since the protruding portion 20B is provided near the side portion of the run-flat tire, that is, near the generation source of the temperature increase, the air flow flowing into the surface of the rim flange portion 14B effectively increases the temperature of the pneumatic tire. Can be suppressed.

[Third embodiment]
In the first embodiment described above, the tire / wheel assembly including the protrusion provided on the disk portion has been described. However, in the following third embodiment, the tire / wheel assembly including the protrusion provided on the rim portion. explain. However, in 3rd Embodiment, a different point from 1st Embodiment is demonstrated and the overlapping description is abbreviate | omitted. Further, in the drawings of the third embodiment below, the same parts as those of the tire / wheel assembly according to the first embodiment described above are denoted by the same reference numerals.

In the following third embodiment, (1) the configuration of the tire / wheel assembly, and (2) the action / effect will be described.
(1) Configuration of Tire / Wheel Assembly FIG. 7 is a partial cross-sectional perspective view of the tire / wheel assembly according to the third embodiment. Moreover, FIG. 8 is sectional drawing (DD sectional drawing of FIG. 7) which shows the tire and wheel assembly which concerns on 3rd Embodiment. FIG. 9 is a cross-sectional view (cross-sectional view taken along the line E-E in FIG. 7) showing the tire / wheel assembly according to the third embodiment.

  As shown in FIGS. 7 and 8, the tire / wheel assembly 1C includes a pneumatic tire 2 and a vehicle wheel 10C. The vehicle wheel 10C includes a protruding portion 20C that protrudes from the rim portion 18C of the main body portion 12C toward the radially inner side of the rim portion 18C.

  The protruding portion 20C is provided on the surface of the main body portion 12C in contact with the outside air, that is, on the rim portion 18C. The protrusion 20C has a fin-like shape extending linearly along the tread width direction of the pneumatic tire 2 that is a direction substantially orthogonal to the rotation direction of the vehicle wheel 10C mounted on the vehicle. Further, a plurality of protruding portions 20C are provided at predetermined intervals along the circumferential direction of the vehicle wheel 10C.

 As shown in FIG. 9, the protruding portion 20C has a front wall portion 20c that is substantially orthogonal to the rotational direction of the vehicle wheel 10C. The extending direction angle (θc) formed by the main body portion 12C and the front wall portion 20c is 70 degrees to 110 degrees. Specifically, in the front view of the vehicle wheel 10C, which is a surface orthogonal to the extending direction of the axle to which the vehicle wheel 10C is attached, the extending direction angle formed by the main body portion 12C and the front wall portion 20c ( θc) is between 70 degrees and 110 degrees.

(2) Action / Effect In the third embodiment, the protruding portion 20C is provided on the rim portion 18C and protrudes inward in the radial direction of the rim portion 18C. For this reason, in the front view of the vehicle wheel 10C, which is a surface orthogonal to the extending direction of the axle, the rim portion 18C and the protruding portion 20C are located behind the disk portion 16, so the protruding portion 20C enters the field of view. Hateful. Therefore, the protrusion 20C can further suppress the temperature increase of the pneumatic tire without impairing the appearance of the vehicle wheel 10C.

  In the third embodiment, the extending direction angle (θc) is set in a range of 70 ° ≦ θc ≦ 110 °. For this reason, the airflow flowing on the surface of the rim portion 18C is more likely to rise in the normal direction from the surface of the rim portion 18C to the tire surface of the vehicle wheel 10C by the protruding portion 20C. As a result, the air flow further flows into the surface of the rim portion 18C as a downward flow on the rear side of the protruding portion 20C with respect to the rotation direction of the vehicle wheel 10C, thereby further suppressing the temperature rise of the surface of the rim portion 18C. it can. Thereby, since the temperature rise of the air between the rim | limb part 18C and the pneumatic tire 2 can be suppressed, the temperature rise of the pneumatic tire 2 can be suppressed more effectively.

[Fourth embodiment]
In the first embodiment described above, the tire / wheel assembly including the fin-like protrusions has been described. In the following fourth embodiment, the tire / wheel assembly including the columnar protrusions will be described. However, in 4th Embodiment, a different point from 1st Embodiment is demonstrated and the overlapping description is abbreviate | omitted. Moreover, in the drawings of the following fourth embodiment, the same parts as those of the tire / wheel assembly according to the above-described first embodiment will be described with the same reference numerals.

 In the following fourth embodiment, (1) the configuration of the tire / wheel assembly, and (2) the action / effect will be described.

(1) Configuration of Tire / Wheel Assembly FIG. 10 is a partial cross-sectional perspective view of the tire / wheel assembly according to the fourth embodiment.

  As shown in FIG. 10, the tire / wheel assembly 1D includes a pneumatic tire 2 and a vehicle wheel 10D. The vehicle wheel 10D includes a protruding portion 20D that protrudes from the disc portion 16D of the main body portion 12D toward the vehicle outer side direction and the vehicle inner side direction. The protrusion 20D is provided on the surface of the main body 12D that comes into contact with the outside air, that is, the outer surface of the disk portion 16D and the inner surface of the vehicle.

    The protrusion 20D has a columnar shape extending in the tread width direction of the pneumatic tire 2 that is a direction substantially orthogonal to the rotation direction of the vehicle wheel 10D mounted on the vehicle. Further, a plurality of protrusions 20D are provided at predetermined intervals along the circumferential direction of the vehicle wheel 10D, specifically, in a staggered arrangement.

(2) Action / Effect In the fourth embodiment, the protrusion 20D is provided on the outer surface of the disk portion 16D and the inner surface of the vehicle. For this reason, a turbulent flow is generated on the vehicle outer surface and the vehicle inner surface of the disk portion 16D, and the temperature rise can be suppressed from both surfaces of the disk portion 16D (the vehicle outer surface and the vehicle inner surface).

[Fifth Embodiment]
In the above-described fourth embodiment, the tire / wheel assembly including the columnar protrusion provided in the disk portion has been described. However, in the following fifth embodiment, the columnar shape provided in the rim portion and the rim flange portion. A tire / wheel assembly having a protrusion will be described. However, in 5th Embodiment, a different point from 4th Embodiment is demonstrated and the overlapping description is abbreviate | omitted. Further, in the drawings of the following fifth embodiment, the same parts as those of the tire / wheel assembly according to the above-described fourth embodiment will be described with the same reference numerals.

 In the following fifth embodiment, (1) the structure of a tire / wheel assembly will be described.

(1) Configuration of Tire / Wheel Assembly FIG. 11 is a partial cross-sectional perspective view of the tire / wheel assembly according to the fifth embodiment.

  As shown in FIG. 11, the tire / wheel assembly 1E includes a pneumatic tire 2 and a vehicle wheel 10E. The vehicle wheel 10E includes a protruding portion 20E that protrudes from the rim flange portion 14E of the main body portion 12E along the extension direction of the axle. The protruding portion 20E is provided on the surface of the main body portion 12E that comes into contact with the outside air, that is, the surface on the vehicle outer side and the surface on the vehicle inner side of the rim flange portion 14E located on the side opposite to the side that holds the bead portion 4.

  The rim portion 18E of the main body portion 12E includes a protruding portion 20F that protrudes from the rim portion 18E toward the inside in the radial direction of the rim portion 18E. The protruding portion 20F is provided on the surface of the main body portion 12E that comes into contact with the outside air, that is, the radially inner surface of the rim portion 18E.

  The protrusion 20E has a columnar shape extending in the tread width direction of the pneumatic tire 2 that is a direction substantially orthogonal to the rotation direction of the vehicle wheel 10E mounted on the vehicle.

  The projecting portion 20F has a columnar shape extending inward in the radial direction of the rim portion 18E, which is a direction substantially orthogonal to the rotational direction of the vehicle wheel 10E mounted on the vehicle.

  A plurality of the protrusions 20E and the protrusions 20F are provided at predetermined intervals so as to form a staggered arrangement along the circumferential direction of the vehicle wheel 10E.

[Other embodiments]
As described above, the content of the present invention has been disclosed through one embodiment of the present invention. However, it should not be understood that the description and drawings constituting a part of this disclosure limit the present invention. From this disclosure, various alternative embodiments, examples and operational techniques will be apparent to those skilled in the art.

  For example, in the above-described embodiment, the protruding portion 20A has been described as being provided on the outer surface of the vehicle of the disk portion 16A as the main body portion 12A that comes into contact with outside air. However, the present invention is not limited to this, and FIG. As shown, the main body portion 12G may include a rim flange portion 14G that locks the bead portion 4 of the pneumatic tire 2. The protruding portion 20G is provided on the surface of the rim flange portion 14G on the side where the bead portion 4 is locked. According to this, by providing the projecting portion 20G, the surface area of the rim flange portion 14G on the side where the bead portion 4 is locked can be increased, and the air between the rim flange portion 14G and the pneumatic tire 2 can be increased. Therefore, the temperature rise of the pneumatic tire 2 can be further suppressed.

  Further, for example, in the above-described embodiment, the protruding portion 20A has been described as being provided on the outer surface of the disk portion 16A as the main body portion 12A that comes into contact with the outside air. However, the present invention is not limited to this. The portion 16A may be provided on the inner surface of the vehicle. In other words, the protrusions may be provided on the main body 12A that comes into contact with the outside air, and may be provided on both the inside and outside of the vehicle of the disk portion 16A. Of course, the protruding portion 20B, the protruding portion 20D, and the protruding portion 20E may be provided on the main body portion that comes into contact with the outside air similarly to the protruding portion 20A.

  In the above-described embodiment, the protruding portion 20A (the protruding portion 20B and the protruding portion 20C) has a fin shape, and the protruding portion 20D (the protruding portion 20E and the protruding portion 20F) has a columnar shape. However, the shape of the protruding portion is not limited to this. For example, the protrusion may be a rectangular parallelepiped, a columnar shape, a conical shape, or the like.

  As described above, the present invention naturally includes various embodiments that are not described herein. Therefore, the technical scope of the present invention is defined only by the invention specifying matters according to the scope of claims reasonable from the above description.

  Next, in order to further clarify the effects of the present invention, the results of tests performed using pneumatic tires according to the following comparative examples and examples will be described. In addition, this invention is not limited at all by these examples. In addition, the data regarding each pneumatic tire were measured on the conditions shown below.

・ Tire size: 155 / 65R13
・ Internal pressure condition: 210kPa
・ Load condition: 5.0kN
The configuration and test results (durability) of each pneumatic tire will be described with reference to Table 1.

    As shown in Table 1, the pneumatic tire according to Comparative Example 1 has no protrusion on the tire surface. The pneumatic tire according to Example 1 includes the protruding portion 20C described in the third embodiment. The pneumatic tire according to Example 2 includes the protruding portion 20A described in the first embodiment and the protruding portion on the vehicle inner surface of the disk portion 16A. The pneumatic tire according to Examples 3 to 7 includes the protruding portion 20B described in the second embodiment and the protruding portion 20C described in the third embodiment. Example 8 includes the protruding portion 20D described in the fourth embodiment. Example 9 includes the protruding portion 20E and the protruding portion 20F described in the fifth embodiment.

<Durability>
Each pneumatic tire was mounted on a test drum, and the endurance distance until the pneumatic tire failed was indexed. In addition, durability of the pneumatic tire which concerns on a comparative example was set to 100, and durability of the other pneumatic tire was evaluated. The larger the value, the better the durability.

  As a result, since the pneumatic tire according to Examples 1 to 9 has a higher heat radiation effect on the temperature of the main body of the vehicle wheel than the pneumatic tire according to the comparative example, the durability of the pneumatic tire itself is improved. I found out that

  Next, FIG. 13 shows the result of the durability test using a turbulent flow generation projection having a different p / h. The vertical axis of the graph in FIG. 13 is a heat transfer coefficient obtained by applying a constant voltage to the heater to generate a certain amount of heat and measuring the temperature of the tire surface when it is sent by a blower. That is, the greater the heat transfer coefficient, the higher the heat dissipation effect of the tire side portion and the better the durability. Here, the heat transfer coefficient of a pneumatic tire (Comparative Example 1 described above) in which no protrusion is provided is set to “100”. This heat transfer coefficient measurement test was performed under the following conditions.

・ Tire size: 155 / 65R13
・ Internal pressure condition: 210kPa
・ Load condition: 5.0kN
As shown in FIG. 13, the relationship between the value (p / h) of the ratio between the pitch p of the radial projections and the radial projection height h (p / h) and the durability performance is that p / h is 1.0 or more and 50 The heat transfer coefficient is increased below 0.0. By setting p / h in the range of 2.0 to 24.0, the heat transfer rate is better and the durability is higher. For this reason, in the radial projection, it is preferable to set a range of 1.0 ≦ p / h ≦ 50.0, and it is particularly preferable to set a range of 2.0 ≦ p / h ≦ 24.0. I understand.

1 is a partial cross-sectional perspective view showing a tire / wheel assembly according to a first embodiment of the present invention. 1 is a cross-sectional view showing a tire / wheel assembly according to a first embodiment of the present invention. It is a perspective view which shows a part of protrusion part which concerns on 1st Embodiment of this invention. It is sectional drawing which shows the protrusion part which concerns on 1st Embodiment of this invention. It is a partial cross section perspective view showing the tire and wheel assembly concerning a 2nd embodiment of the present invention. It is sectional drawing which shows the tire and wheel assembly which concerns on 2nd Embodiment of this invention. It is a partial cross section perspective view which shows the tire and wheel assembly which concerns on 3rd Embodiment of this invention. It is sectional drawing which shows the tire and wheel assembly which concerns on 3rd Embodiment of this invention. It is sectional drawing which shows a part of protrusion part which concerns on 3rd Embodiment of this invention. It is a partial cross section perspective view which shows the tire and wheel assembly which concerns on 4th Embodiment of this invention. It is a partial cross section perspective view showing the tire and wheel assembly concerning a 5th embodiment of the present invention. It is sectional drawing which shows the tire and wheel assembly which concerns on other embodiment of this invention. It is a graph which shows the heat transfer rate of the pneumatic tire in the Example of this invention.

Explanation of symbols

E ... Edge part, S1 ... Air flow, S2, S3 ... Fluid,
1A, 1B, 1C, 1D, 1E, 1G ... tire / wheel assembly, 2 ... tire, 4 ... bead portion 10A, 10B, 10C, 10D, 10E, 10G ... vehicle wheel,
12A, 12B, 12C, 12D, 12E, 12G ... main body 14, 14B, 14E, 14G ... rim flange part 16, 16A, 16D ... disc part,
18, 18 C, 18 E: rim part, 20 A, 20 B, 20 C, 20 D, 20 E, 20 F, 20 G ... projecting part,
20a, 20c ... front wall part

Claims (17)

A vehicle wheel on which a pneumatic tire is assembled,
A protrusion that protrudes in a predetermined direction from the main body of the vehicle wheel;
The protrusion is a vehicle wheel provided on at least a part of the surface of the main body in a state where a pneumatic tire is assembled to the vehicle wheel.   The vehicle wheel according to claim 1, wherein the protrusion is provided on a surface of the main body that comes into contact with outside air.   The vehicle wheel according to claim 1, wherein the main body portion includes a rim flange portion that locks a bead portion of the pneumatic tire.   4. The vehicle wheel according to claim 1, wherein the protrusion has a fin shape extending along a direction substantially orthogonal to a rotation direction of the vehicle wheel mounted on the vehicle. 5. .   The vehicle wheel according to claim 1, wherein a plurality of the projecting portions are provided along a circumferential direction of the vehicle wheel.   The vehicle wheel according to claim 5, wherein the protrusion is provided at predetermined intervals.   When the distance between the protrusions is a distance p and the distance from the surface of the main body part to the tip of the protrusion is a height h, the distance p and the height h are 1.0 ≦ p / The vehicle wheel according to claim 6, wherein a relationship of h ≦ 50.0 is satisfied. The vehicle wheel according to claim 7, wherein the distance p and the height h satisfy a relationship of 2.0 ≦ p / h ≦ 24.0.   When the interval between the protrusions is the interval p, and the width of the protrusion along the circumferential direction of the vehicle wheel is the width w, the interval p and the width w are 1.0 ≦ (p−w). ) /W≦100.0 The vehicle wheel according to any one of claims 6 to 8, which satisfies the relationship. The protrusion has a front wall portion substantially orthogonal to the rotation direction,
The vehicle wheel according to any one of claims 4 to 9, wherein an angle formed by the main body portion and the front wall portion is 70 to 110 degrees.   The vehicle wheel according to claim 10, wherein the angle is 70 degrees to 110 degrees in a front view of the vehicle wheel, which is a surface orthogonal to an extending direction of an axle to which the vehicle wheel is attached.   The vehicle wheel according to claim 10, wherein the angle is 70 degrees to 110 degrees in a cross section of the vehicle wheel along an extension direction of an axle to which the vehicle wheel is attached. The main body has a disc-shaped disk portion including an axle mounting portion to which an axle is mounted;
The vehicle wheel according to any one of claims 1 to 12, wherein the protrusion is provided on the disk portion.   The vehicle wheel according to any one of claims 3 to 12, wherein the protruding portion is provided on the rim flange portion located on a side opposite to a side on which the bead portion is locked. The main body portion is a disc-shaped disc portion including an axle attached portion to which an axle is attached;
An annular rim extending from the disk portion along the tread width direction of the pneumatic tire;
The vehicle wheel according to any one of claims 1 to 12, wherein the protruding portion protrudes radially inward of the rim portion. Pneumatic tires,
A tire / wheel assembly including a vehicle wheel to which the pneumatic tire is assembled,
The vehicle wheel includes a protruding portion that protrudes in a predetermined direction from a main body portion of the vehicle wheel,
The protrusion is a tire / wheel assembly provided on at least a part of a surface of the main body in a state where a pneumatic tire is assembled to the vehicle wheel.   A tire / wheel assembly comprising the vehicle wheel according to claim 2.

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