JP2007168542A - Tire wheel assembly and pneumatic tire - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a tire wheel assembly and a pneumatic tire capable of reducing tire rim slippage. <P>SOLUTION: This tire wheel assembly 1 and 10 is constituted of a wheel 10 having a rim flange part 11 of ≥30 mm by making a rim diameter R as a reference on at least one side and the pneumatic tire 1 mounted on the wheel 10. The pneumatic tire 1 has a fitting part 61 on a wall surface at the tire width direction outside of a side wall part. The fitting part 61 is fitted to a projection part 12 formed in the rim flange part 11. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a tire wheel assembly and a pneumatic tire, and more particularly to a tire wheel assembly and a pneumatic tire that can reduce tire rim slip.

  In recent years, large PCs (Passenger Cars), SUVs (Sports Utility Vehicles), and the like have attracted attention not only to improve tire performance but also to improve tire design and increase the size of wheels from the viewpoint of emphasizing fashion. For example, there is a great interest in the assembly of tires with small flatness and large wheels.

  Here, a large PC or SUV has a heavy vehicle weight and a large engine output. For this reason, when the rim fitting force of the tire is weak, there is a possibility that slip (rim slip) may occur between the tire and the rim during driving or braking. Such a rim slip causes the wheel balance of the tire to be out of order, so that the riding comfort performance of the tire is deteriorated. For this reason, a pneumatic tire is required to reduce tire rim slip.

  In this problem, the technique described in Patent Document 1 is known for conventional pneumatic tires. The conventional pneumatic tire is a pneumatic tire having a radial radial groove of 0.2 to 0.5 mm in the bead heel portion, and the groove includes the rim cushion portion center S1 and the bead heel portion inner end R2. An inner groove extending from between the bead toe part Q2 or an outer groove extending between the bead base part center S2 and the bead heel part outer end part R1 and beyond the rim cushion part outer end part Q1.

JP 2004-189045 A

  It is an object of the present invention to provide a tire wheel assembly and a pneumatic tire that can reduce tire rim slip.

  In order to achieve the above object, a tire wheel assembly according to the present invention is mounted on a wheel having a rim flange portion having a height of 30 [mm] or more on the basis of a rim diameter R at least on one side, and the wheel. The pneumatic tire has a fitting portion on the outer wall surface of the sidewall portion in the tire width direction, and the fitting portion is formed on the rim flange portion. It is characterized by being fitted to the protruding portion.

  In this tire / wheel assembly, since the fitting portion of the pneumatic tire and the projection portion of the wheel are fitted together in the tire rim assembly state, the engagement between the fitting portion and the projection portion causes driving and braking. There is an advantage that the rim slip at the time is suppressed. Note that only one set of the fitting portion and the protruding portion may be formed, or a plurality of sets may be formed along the tire circumferential direction. Moreover, the shape of a fitting part and a projection part is not specifically limited.

  In the tire wheel assembly according to the present invention, a plurality of sets of the fitting portion and the protrusion are formed, and a width T in the tire circumferential direction of the protrusion is 1 [mm] ≦ T ≦ 15 [mm. ] And the protrusion amount G of the protrusion satisfies 0.5 [mm] ≦ G ≦ 3.0 [mm].

  In the tire / wheel assembly, the above-described configuration has an advantage that the effect of suppressing the rim slip is improved and the durability of the tire is maintained.

  In the tire wheel assembly according to the present invention, the protrusion has a shape elongated in the wheel radial direction, and the length W of the protrusion in the wheel radial direction and the height H of the rim flange portion are It has a relationship of 0.20 ≦ W / H ≦ 0.85.

  In this pneumatic tire, the protrusion has a long shape in the wheel radial direction and the length W is optimized, so that the rigidity of the rim flange portion in the wheel radial direction is increased. Thereby, there exists an advantage by which the deformation | transformation or damage of a rim flange part is reduced.

  In the tire wheel assembly according to the present invention, the plurality of protrusions are arranged in the wheel radial direction, and the sum W of the plurality of protrusions and the height H of the rim flange part are 0. 20 ≦ W / H ≦ 0.85.

  In this tire / wheel assembly, since the ratio W / H between the sum W of the lengths of the plurality of protrusions and the height H of the rim flange portion is optimized, it is applied in the wheel radial direction in the same manner as the above configuration. The rigidity of the rim flange is increased. Thereby, there exists an advantage by which the deformation | transformation or damage of a rim flange part is reduced.

  In the tire wheel assembly according to the present invention, the protrusion has a polygonal shape.

  In this tire wheel assembly, the engagement between the corner of the protrusion and the fitting portion is improved, so that there is an advantage that the effect of suppressing rim slip is improved.

  Further, in the tire wheel assembly according to the present invention, the end portion on the inner side in the wheel radial direction of the protrusion is located at a distance A of A ≦ 15 [mm] with respect to the rim diameter R of the wheel.

  In this tire-wheel assembly, the end of the protrusion is positioned closer to the inner diameter of the rib flange portion, so that the fitting pressure between the protrusion and the fitting portion is suitably ensured. Thereby, there exists an advantage which the air-seal property between a projection part and a fitting part improves.

  The pneumatic tire according to the present invention is a pneumatic tire that is attached to a wheel having a rim flange portion on at least one side, the height H of which is H ≧ 30 [mm] with respect to the rim diameter R. In addition, a fitting portion is formed on a wall surface of the sidewall portion on the outer side in the tire width direction, and the fitting portion is fitted to a protrusion formed on the rim flange portion.

  In this pneumatic tire, the fitting portion is formed on the wall surface on the outer side in the tire width direction of the sidewall portion, and the fitting portion is fitted to the protrusion formed on the rim flange portion. There is an advantage that rim slip during driving and braking is suppressed by engagement with the protrusion.

  In the tire wheel assembly according to the present invention, since the fitting portion of the pneumatic tire and the protrusion portion of the wheel are fitted in the tire rim assembly state, the driving is performed by the engagement between the fitting portion and the protrusion portion. There is an advantage that rim slip is suppressed during braking and braking.

  Further, in the pneumatic tire according to the present invention, the fitting portion is formed on the wall surface of the sidewall portion on the outer side in the tire width direction, and the fitting portion is fitted to the protrusion formed on the rim flange portion. There is an advantage that the rim slip during driving and braking is suppressed by the engagement between the fitting portion and the protruding portion.

  Hereinafter, the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited to the embodiments. The constituent elements of this embodiment include those that can be easily replaced by those skilled in the art or those that are substantially the same. In addition, a plurality of modifications described in this embodiment can be arbitrarily combined within a range obvious to those skilled in the art.

  1 to 3 are a sectional view (FIG. 1), a side view (FIG. 2) and an enlarged view (FIG. 3) in a tire meridian direction showing a tire wheel assembly according to an embodiment of the present invention. 4 and 5 are explanatory views showing the protrusions of the wheel of the tire wheel assembly shown in FIG. 6-8 is explanatory drawing which shows the modification of the projection part of the wheel described in FIG. FIG. 9 is a chart showing the results of a performance test of a pneumatic tire.

[Tire wheel assembly]
In recent tire wheel assemblies 1, 10, from the viewpoint of improving fashionability, the wheel 10 has a large rim flange portion 11 on the side located on the vehicle outer side in a tire mounted state. On the other hand, a pneumatic tire 1 is mounted (see FIGS. 1 and 2). Specifically, the wheel 10 has a rim flange portion 11 having a height H with respect to the rim diameter R of H ≧ 30 [mm] at least on one side (side located on the vehicle outer side in a tire mounted state). Have. The wheel 10 may have such large rim flange portions 11 on both sides.

  The pneumatic tire 1 includes bead cores 2 and 2, a carcass layer 3, a belt layer 4, a tread rubber 5, and a sidewall rubber 6 (see FIG. 1). The bead cores 2 and 2 are configured as a pair of left and right. The carcass layer 3 is bridged between the left and right bead cores 2 and 2 in a toroidal shape. The belt layer 4 is disposed on the outer periphery of the carcass layer 3 in the tire radial direction. The tread rubber 5 is disposed on the outer circumference in the tire radial direction of the carcass layer 3 and the belt layer 4 to constitute a tread portion of the tire. The sidewall rubber 6 is disposed on the outer side in the tire width direction of the carcass layer 3 and constitutes a sidewall portion of the tire.

  Here, the fitting part 61 is formed in the sidewall part of a tire on the outer wall surface in the tire width direction (see FIGS. 1 to 3). The fitting portion 61 is, for example, a groove-shaped recess, and the groove length direction is directed to the tire radial direction. Further, the plurality of fitting portions 61 are formed in a substantially radial shape with a predetermined interval along the tire circumferential direction.

  On the other hand, the rim flange portion 11 of the wheel 10 has a protrusion 12 formed on the inner wall surface in the width direction (see FIGS. 1 to 3). The protrusion 12 has, for example, a rib shape or a key shape, and has a predetermined convex amount, a length dimension W, and a width dimension that fit into the fitting portion 12 of the sidewall portion. In addition, a plurality of protrusions 12 are formed corresponding to each fitting portion 61.

  In addition, the shape, arrangement | sequence, installation number, etc. of the fitting part 61 and the projection part 12 are not specifically limited, For example, a design change is arbitrarily possible according to the design of the wheel 10, etc. Further, the shape of the protrusion 12 is not particularly limited. Further, the fitting dimension between the fitting portion 61 and the protruding portion 12 is configured so that rim displacement (rim sliding) in the circumferential direction of the tire does not occur in the tire rim assembled state.

  In the tire wheel assemblies 1, 10, the fitting portion 61 of the pneumatic tire 1 and the protruding portion 12 of the wheel 10 are fitted together in the tire rim assembled state. There is an advantage that rim slip during driving and braking is suppressed by the engagement.

[Modification 1]
Moreover, in this tire wheel assembly 1, 10, it is preferable that a plurality of sets of fitting portions 61 and protrusions 12 are formed (see FIG. 2). That is, a plurality of fitting portions 61 are formed on the sidewall portions, and a plurality of protrusions 12 are formed on the rim flange 11 corresponding to these fitting portions 61. In such a configuration, the pneumatic tire 1 and the wheel 10 are fitted at a plurality of points in the tire rim assembly state. Thereby, compared with the structure which consists only of one set of the fitting part 61 and the projection part 12, there exists an advantage by which the rim | limb slip at the time of a drive and a brake is suppressed more effectively.

  Moreover, it is preferable that the width T in the tire circumferential direction of the protrusion 12 satisfies 1 [mm] ≦ T ≦ 15 [mm] (see FIG. 5). Thereby, there is an advantage that the effect of suppressing the rim slip and the durability of the tire are maintained. For example, if the width T of the protruding portion 12 is too small (T <1 [mm]), the fitting force between the fitting portion 61 and the protruding portion 12 is reduced, and rim slip is not effectively suppressed. The fitting portion 61 side is damaged due to the failure, and the durability of the tire is lowered. On the other hand, if the width T of the protrusion 12 is too large (15 [mm] <T), the weight of the wheel 10 increases.

  Moreover, it is preferable that the protrusion amount G of the protrusion 12 satisfies 0.5 [mm] ≦ G ≦ 3.0 [mm] (see FIGS. 4 and 5). Thereby, there is an advantage that the effect of suppressing the rim slip and the durability of the tire are maintained. For example, if the protruding amount G of the protruding portion 12 is too small (G <0.5 [mm]), the fitting force between the fitting portion 61 and the protruding portion 12 becomes small and rim slip is not effectively suppressed. On the other hand, if the protruding amount G of the protruding portion 12 is too large (3.0 [mm] <G), the depth of the fitting portion 61 increases, and the durability of the tire decreases.

  Further, as described above, a plurality of sets of fitting portions 61 and protrusions 12 are formed, and the width T in the tire circumferential direction of the protrusions 12 satisfies 1 [mm] ≦ T ≦ 15 [mm] When the protrusion amount G of the protrusion 12 satisfies 0.5 [mm] ≦ G ≦ 3.0 [mm], these synergistic effects improve the effect of suppressing rim slip and maintain the durability of the tire. There are advantages.

[Modification 2]
In the pneumatic tire 1, the protrusion 12 has a shape that is long (has a long side) in the wheel radial direction, and the length W of the protrusion 12 in the wheel radial direction and the height of the rim flange 11. H preferably has a relationship of 0.20 ≦ W / H ≦ 0.85 (see FIGS. 2, 4 and 5). In such a configuration, the rigidity of the rim flange portion 11 in the wheel radial direction is increased by optimizing the long shape of the protrusion 12 and its length W. Thereby, there exists an advantage by which the deformation | transformation or damage of the rim flange part 11 is reduced. For example, when the ratio W / H between the length W of the protrusion 12 and the height H of the rim flange 11 is W / H <0.20, the rigidity of the rim flange 11 is not sufficiently ensured.

  In this configuration, since the protrusion 12 is formed on the inner wall surface of the rim flange portion 11 as described above, both ends of the protrusion 12 extend from the rim diameter R of the wheel 10 to the height H of the rim flange portion 11 ( It is within the range up to the outer peripheral edge.

  In the above configuration, the plurality of protrusions 12 may be arranged in the wheel radial direction (see FIG. 6). In other words, the configuration is not limited to a single and long protrusion 12 (see FIG. 5), and a plurality of protrusions 12 may be arranged in a row or continuously in the wheel radial direction. In such a configuration, it is preferable that the sum W of the lengths W1 and W2 of the plurality of projecting portions 12 and 12 and the height H of the rim flange portion 11 have a relationship of 0.20 ≦ W / H ≦ 0.85. As a result, the rigidity of the rim flange portion 11 in the wheel radial direction is increased in the same manner as in the above configuration, so that there is an advantage that deformation or breakage of the rim flange portion 11 is reduced.

  Further, the present invention is not limited to the above, and a plurality of protrusions 12 may be arranged on the inner wall surface of the rim flange 11 (see FIG. 8). Such a configuration also has the advantage that the effect of suppressing rim slip is improved.

  Moreover, in said structure, it is preferable that the projection part 12 has polygonal shape (refer FIG. 5). In such a configuration, the engagement between the corners of the protrusion 12 and the fitting portion 61 is improved, so that there is an advantage that the effect of suppressing rim slip is improved. However, the present invention is not limited to this, and the protrusion 12 may have an elliptic cylinder shape, a cylindrical shape, a semi-elliptical sphere shape, a hemispherical shape, or the like (see FIGS. 7 and 8).

  Moreover, in said structure, it is preferable that the edge part of the wheel radial direction inner side of the projection part 12 is located in the distance A of A> = 15 [mm] on the basis of the rim diameter R of the wheel 10 (refer FIG. 3). In such a configuration, the end portion of the protrusion 12 is positioned closer to the inner diameter of the rib flange portion 11, so that the fitting pressure between the protrusion 12 and the fitting portion 61 is suitably ensured. Thereby, there exists an advantage which the air-seal property between the projection part 12 and the fitting part 61 improves.

[Pneumatic tire]
Further, in the pneumatic tire 1 applied to the tire wheel assemblies 1 and 10 described above, the fitting portion 61 is formed on the wall surface of the sidewall portion 6 on the outer side in the tire width direction as described above. Since the portion 61 is fitted into the protrusion 12 formed on the rim flange portion 11, there is an advantage that the rim slip during driving and braking is suppressed by the engagement of the fitting portion 61 and the protrusion 12.

[performance test]
In this example, a performance test for rim slip resistance was performed on a plurality of types of tire wheel assemblies having different conditions (see FIG. 4). In this performance test, a pneumatic tire having a tire size of 305 / 50R20 is mounted on a regular rim (wheel) specified by JATMA, and a normal internal pressure and a normal load are applied to the pneumatic tire.

  The performance test for anti-rim sliding performance is performed after a test vehicle equipped with a tire wheel assembly suddenly accelerates from a vehicle speed of 0 [km / h] to 50 [km / h] and starts (rapid drive). Sudden braking is performed from 50 [km / h] to 0 [km / h]. Then, the running test by such sudden driving and sudden braking is performed 20 times. In addition, the wheel and the tire are preliminarily provided with positioning marks divided into four in the circumferential direction, and this mark causes the tire rim slip amount (deviation in the tire circumferential direction) during sudden driving and braking. Quantity) is measured. The rim slip amount is measured for each of two tires mounted on the front and rear wheels of the test vehicle. Then, the average value of each measurement value is recorded as the rim slip amount. The smaller the amount of rim slip, the better.

  The conventional tire wheel assembly does not have a tire fitting portion and a wheel protrusion. On the other hand, the tire wheel assembly of the invention example has the fitting portion 61 in the sidewall portion and the projection portion 12 in the rim flange 11, and these are fitted to each other in the tire rim assembled state (see FIGS. 62 and 12). 1 to FIG. 3). In the example of the invention, the protrusion amount G of the protrusion 12 is set to G = 1.5 [mm].

  As shown in the test results, it can be seen that the rim slip amount is significantly reduced in the pneumatic tire of the inventive example as compared with the conventional example.

  As described above, the tire wheel assembly and the pneumatic tire according to the present invention are useful in that the rim slip of the tire can be reduced.

It is sectional drawing of the tire meridian direction which shows the tire wheel assembly concerning the Example of this invention. 1 is a side view of a tire meridian direction showing a tire wheel assembly according to an embodiment of the present invention. 1 is an enlarged view of a tire meridian direction showing a tire wheel assembly according to an embodiment of the present invention. It is explanatory drawing which shows the protrusion part of the wheel of the tire wheel assembly described in FIG. It is explanatory drawing which shows the protrusion part of the wheel of the tire wheel assembly described in FIG. It is explanatory drawing which shows the modification of the protrusion part of the wheel described in FIG. It is explanatory drawing which shows the modification of the protrusion part of the wheel described in FIG. It is explanatory drawing which shows the modification of the protrusion part of the wheel described in FIG. It is a graph which shows the result of the performance test of a pneumatic tire.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Tire wheel assembly 2 Bead core 3 Carcass layer 4 Belt layer 5 Tread rubber 6 Side wall rubber 61 Fitting part 10 Wheel 11 Rim flange part 12 Protrusion part

Claims (7)

A tire wheel assembly comprising a wheel having a rim flange portion having a height of 30 [mm] or more on the basis of a rim diameter R on at least one side, and a pneumatic tire attached to the wheel,
The tire wheel assembly, wherein the pneumatic tire has a fitting portion on a wall surface on the outer side in a tire width direction of a sidewall portion, and the fitting portion is fitted to a protrusion formed on the rim flange portion. Solid.   A plurality of sets of the fitting part and the protrusion part are formed, and a width T in the tire circumferential direction of the protrusion part satisfies 1 [mm] ≦ T ≦ 15 [mm], and the protrusion amount G of the protrusion part The tire / wheel assembly according to claim 1, satisfying 0.5 [mm] ≦ G ≦ 3.0 [mm].   The protrusion has an elongated shape in the wheel radial direction, and a length W of the protrusion in the wheel radial direction and a height H of the rim flange portion satisfy 0.20 ≦ W / H ≦ 0.85. The tire wheel assembly according to claim 1 or 2 which has a relation.   The plurality of protrusions are arranged in the wheel radial direction, and the sum W of the plurality of protrusions and the height H of the rim flange part satisfy a relationship of 0.20 ≦ W / H ≦ 0.85 The tire wheel assembly according to claim 1, comprising:   The tire wheel assembly according to any one of claims 1 to 4, wherein the protrusion has a polygonal shape.   The tire wheel assembly according to any one of claims 1 to 5, wherein an end portion of the protrusion in the wheel radial direction is located at a distance A of A? 15 [mm] with respect to a rim diameter R of the wheel. . A pneumatic tire mounted on a wheel having a rim flange portion at least on one side with a height H of H ≧ 30 [mm] based on the rim diameter R,
The pneumatic tire is characterized in that a fitting portion is formed on a wall surface of the sidewall portion on the outer side in the tire width direction, and the fitting portion is fitted to a protrusion formed on the rim flange portion.

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