Tire for leaning vehicle

Abstract

To improve wear resistance of a shoulder part on a vehicle mounting inner side.SOLUTION: A carcass including one or a plurality of carcass plies extending over one bead core embedded in one bead portion and the other bead core embedded in the other bead portion, a tread provided on an outer side of the carcass in a tire radial direction, a belt disposed between the carcass and the tread, L being a length of a contour of a tread surface in a tire axial cross section, and a reinforcing layer disposed, between the carcass and the tread, at least on the vehicle-fitted inner side of the tire equatorial plane so as to include a 1 / 8 point on the vehicle-fitted inner side, where the 1 / 8 point is a position of L / 8 from the tire equatorial plane along the contour, wherein an end of the reinforcing layer on the vehicle-fitted outer side is located between the 1 / 8 point on the vehicle-fitted outer side and the 1 / 8 point on the vehicle-fitted inner side.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] FIELD OF THE DISCLOSURE The present disclosure relates to tires for leaning vehicles. [Background technology]

[0002] A vehicle having three or more wheels and capable of turning while leaning like a two-wheeled vehicle has been disclosed (see Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2023-51041 Summary of the Invention [Problem to be solved by the invention]

[0004] One such vehicle is the Lean Multi Wheel (LMW)® vehicle. Unlike motorcycles, LMW vehicles are not restricted in the maximum lean angle during turning, and the lean angle is maintained by balancing the center of gravity and centrifugal force, so the wheels on the outside and inside of the turn are approximately equal.

[0005] On the other hand, in the case of tilting mobility vehicles (hereinafter referred to as "tilting vehicles") that have been proposed recently, the maximum tilt angle when turning is limited to prevent tipping over when stationary, and when turning at high speed, an imbalance occurs between the ground contact conditions of the wheels on the inside and outside of the turn.

[0006] Specifically, a greater load acts on the inside shoulder of the wheel on the outside of a turn than on the outside shoulder of the wheel on the inside of a turn. As a result, the inside shoulder wears out faster than the outside shoulder. In other words, a difference in the amount of wear occurs between the inside shoulder and the outside shoulder. Moreover, because the shoulders only come into contact with the ground during turns, the difference in wear cannot be reduced during straight-line driving, and the difference in wear continues to widen as driving progresses.

[0007] The present disclosure aims to improve the wear resistance of the shoulder portion on the inside of the vehicle mounting surface. [Means for solving the problem]

[0008] A tilting vehicle tire according to a first aspect includes: a carcass including one or more carcass plies spanning one bead core embedded in one bead portion and the other bead core embedded in the other bead portion; a tread provided on the radially outer side of the carcass; a belt disposed between the carcass and the tread; and a reinforcing layer disposed at least on the vehicle mounting inner side of the tire equatorial plane between the carcass and the tread so as to include the 1 / 8 point on the vehicle mounting inner side, when the length of the contour of the tread surface in the tire axial cross section is L and the position of L / 8 along the contour from the tire equatorial plane is the 1 / 8 point, and when the length of the contour of the tread surface in the tire axial cross section is L and the position of L / 8 along the contour from the tire equatorial plane is the 1 / 8 point, an end portion of the reinforcing layer on the vehicle mounting outer side is located between the 1 / 8 point on the vehicle mounting outer side and the 1 / 8 point on the vehicle mounting inner side.

[0009] In the tilting vehicle tire according to the first aspect, a reinforcing layer is disposed at least on the vehicle mounting inner side of the tire equatorial plane between the carcass and the tread so as to include the vehicle mounting inner 1 / 8 point, and the vehicle mounting outer end of the reinforcing layer is located between the vehicle mounting outer 1 / 8 point and the vehicle mounting inner 1 / 8 point. In other words, since the reinforcing layer is provided at the vehicle mounting inner shoulder between the carcass and the tread, the bending rigidity of the vehicle mounting inner shoulder is higher than the bending rigidity of the vehicle mounting outer shoulder.

[0010] Therefore, the shoulder portion on the vehicle mounting inner side is less susceptible to bending deformation than the shoulder portion on the vehicle mounting outer side, and the contact length when the shoulder portion on the vehicle mounting inner side comes into contact with the ground can be shortened.

[0011] During high-speed cornering, a greater load acts on the inside vehicle-mounted shoulder portion of the tilting vehicle tire on the outside of the corner than on the outside vehicle-mounted shoulder portion of the tilting vehicle tire on the inside of the corner; however, because the contact length of the inside vehicle-mounted shoulder portion of the tilting vehicle tire on the outside of the corner can be shortened, slippage of the inside vehicle-mounted shoulder portion against the road surface can be suppressed, and the wear resistance of the inside vehicle-mounted shoulder portion can be improved.

[0012] In a tilting vehicle tire according to a second aspect, in the vehicle tire according to the first aspect, the end of the reinforcing layer on the vehicle mounting outer side terminates at the 1 / 8 point on the vehicle mounting inner side.

[0013] In the tilting vehicle tire according to the second aspect, the end of the reinforcing layer on the vehicle-mounted outer side terminates at the 1 / 8 point on the vehicle-mounted inner side. That is, since the reinforcing layer is not disposed in the center region of the tread between the 1 / 8 point on the vehicle-mounted outer side and the 1 / 8 point on the vehicle-mounted inner side, the bending rigidity of the center region of the tread can be made lower than that of the shoulder region where the reinforcing layer on the vehicle-mounted inner side is disposed, and for example, when the vehicle weight is light or when traveling at low speeds, the ride comfort can be made softer.

[0014] A tilting vehicle tire according to a third aspect has a carcass including a plurality of carcass plies arranged between one bead core embedded in one bead portion and the other bead core embedded in the other bead portion, a tread provided on the tire radial outside of the carcass, and a belt arranged between the carcass and the tread, wherein the number of carcass plies is greater in an inner carcass portion on a vehicle mounting inside extending from the one bead portion than in an outer carcass portion on a vehicle mounting outside extending from the other bead portion.

[0015] In the tilting vehicle tire according to the third aspect, the inner carcass portion on the vehicle mounting inner side extending from one bead portion has a larger number of carcass plies than the outer carcass portion on the vehicle mounting outer side extending from the other bead portion, so that the bending rigidity of the shoulder portion on the vehicle mounting inner side is higher than the bending rigidity of the shoulder portion on the vehicle mounting outer side. Therefore, the shoulder portion on the inside of the vehicle mounting side is less susceptible to bending deformation than the shoulder portion on the outside of the vehicle mounting side, and the contact length of the shoulder portion on the inside of the vehicle mounting side when it comes into contact with the ground can be shortened, thereby suppressing the shoulder portion on the inside of the vehicle mounting side from slipping on the road surface and improving the wear resistance of the shoulder portion on the inside of the vehicle mounting side.

[0016] A leaning vehicle tire according to a fourth aspect is the leaning vehicle tire according to the third aspect, further comprising: a carcass configured to include a plurality of carcass plies arranged between one bead core embedded in one bead portion and the other bead core embedded in the other bead portion; a tread provided on the tire radially outer side of the carcass; and a belt arranged between the carcass and the tread, wherein when the length of the contour of the tread surface in the tire axial cross section is L and the position of L / 8 from the tire equatorial plane along the contour is defined as the 1 / 8 point, one of the carcass plies has an end on a vehicle mounting inner side engaged with the bead core on the vehicle mounting inner side and an end on a vehicle mounting outer side engaged with the bead core on the vehicle mounting outer side, and the other of the carcass plies has an end on a vehicle mounting inner side engaged with the bead core on the vehicle mounting inner side and an end on a vehicle mounting outer side positioned between the 1 / 8 point on the vehicle mounting outer side and the 1 / 8 point on the vehicle mounting inner side.

[0017] In the tilting vehicle tire according to the fourth aspect, one carcass ply has an end on the vehicle mounting inner side that is anchored to a bead core on the vehicle mounting inner side and an end on the vehicle mounting outer side that is anchored to a bead core on the vehicle mounting outer side, and the other carcass ply has an end on the vehicle mounting inner side that is anchored to a bead core on the vehicle mounting inner side and an end on the vehicle mounting outer side that is located between the 1 / 8 point on the vehicle mounting outer side and the 1 / 8 point on the vehicle mounting inner side, so that the bending rigidity of the shoulder portion on the vehicle mounting inner side is higher than the bending rigidity of the shoulder portion on the vehicle mounting outer side.

[0018] Therefore, the shoulder portion on the vehicle mounting inner side is less susceptible to bending deformation than the shoulder portion on the vehicle mounting outer side, and the contact length (the circumferential length of the contact shape) when the shoulder portion on the vehicle mounting inner side comes into contact with the ground can be shortened.

[0019] During high-speed cornering, a greater load acts on the inside vehicle-mounted shoulder portion of the tilting vehicle tire on the outside of the corner than on the outside vehicle-mounted shoulder portion of the tilting vehicle tire on the inside of the corner; however, because the contact length of the inside vehicle-mounted shoulder portion of the tilting vehicle tire on the outside of the corner can be shortened, slippage of the inside vehicle-mounted shoulder portion against the road surface can be suppressed, and the wear resistance of the inside vehicle-mounted shoulder portion can be improved.

[0020] A tilting vehicle tire according to a fifth aspect is a tilting vehicle tire according to the fifth aspect, wherein the other carcass ply has an end portion on the vehicle mounting outer side that terminates at the 1 / 8 point on the vehicle mounting inner side.

[0021] In the tilting vehicle tire according to the fifth aspect, the other carcass ply has an end on the vehicle mounting outer side that terminates at the 1 / 8 point on the vehicle mounting inner side. That is, since the other carcass ply is not disposed in the center region of the tread between the 1 / 8 point on the vehicle mounting outer side and the 1 / 8 point on the vehicle mounting inner side, the bending rigidity of the tread center region can be made lower than that of the shoulder region where the other carcass ply is disposed on the vehicle mounting inner side than the 1 / 8 point on the vehicle mounting inner side, and for example, the ride comfort can be made softer when the vehicle weight is light or when traveling at low speeds. [Effects of the Invention]

[0022] According to the present disclosure, it is possible to improve the wear resistance of the shoulder portion on the inside of the vehicle mounting surface. [Brief explanation of the drawings]

[0023] [Figure 1] FIG. 2 is a front view schematically showing the state of the tilting vehicle when turning. [Figure 2]1 is a cross-sectional view along a rotation axis (cross-sectional view in the tire axial direction) showing a tire for a tilting vehicle according to a first embodiment. [Figure 3] FIG. 10 is a cross-sectional view along the rotation axis (cross-sectional view in the tire axial direction) showing a tire for a tilting vehicle according to a second embodiment. [Figure 4] FIG. 10 is a cross-sectional view along the rotation axis (cross-sectional view in the tire axial direction) showing a tire for a tilting vehicle according to a third embodiment. [Figure 5] FIG. 10 is a cross-sectional view along the rotation axis (cross-sectional view in the tire axial direction) showing a tire for a tilting vehicle according to a fourth embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0024] [First embodiment] Hereinafter, embodiments for carrying out the present disclosure will be described with reference to the drawings. Components indicated by the same reference numerals in each drawing are the same or similar components. Note that duplicated explanations and reference numerals may be omitted in the embodiments described below. Furthermore, all drawings used in the following description are schematic, and the dimensional relationships, ratios, etc. of each element shown in the drawings do not necessarily match those in reality. Furthermore, the dimensional relationships, ratios, etc. of each element between multiple drawings do not necessarily match.

[0025] In the drawings, the direction of arrow R indicates the tire radial direction, and the direction of arrow W indicates the tire width direction. The tire radial direction means the direction perpendicular to the tire rotation axis (not shown). The tire width direction means the direction parallel to the tire rotation axis. The tire width direction can also be referred to as the tire axial direction. Furthermore, "IN" indicates the inside direction when mounted on a vehicle, and "OUT" indicates the outside direction when mounted on a vehicle.

[0026] 1, the tilting vehicle 100 tilts when turning, but the maximum tilt angle when turning is limited to prevent tipping over when stationary, and has the characteristic that when turning at high speed, an imbalance occurs between the ground contact state of the wheel 12 on the inside of the turn (left side in FIG. 1) and the ground contact state of the wheel 14 on the outside of the turn (right side in FIG. 1). For this reason, the load F14 acting on the shoulder portion on the inside of the vehicle mounting of the wheel 14 on the outside of the turn is greater than the load F12 acting on the shoulder portion on the outside of the vehicle mounting of the wheel 12 on the inside of the turn. The shoulder portion will be described in detail later.

[0027] In FIG. 2, the tire 10 for a tilting vehicle according to this embodiment is a so-called radial tire, and includes a bead core 18 embedded in one bead portion 16 and a carcass 20 spanning the bead core 18 embedded in the other bead portion 16.

[0028] The carcass 20 of this embodiment is configured to include a first carcass ply 20A as an example of one carcass ply arranged on the inner side of the tire, and a second carcass ply 20B as an example of another carcass ply arranged on the outer side of the first carcass ply 20A.

[0029] The tire width direction end portion of the first carcass ply 20A and the end portion of the second carcass ply 20B are each anchored to the bead core 18. More specifically, the tire width direction end portion of the first carcass ply 20A and the end portion of the second carcass ply 20B are each wound up around the bead core 18 from the inner side to the outer side in the tire width direction.

[0030] A spiral belt 22, which is an example of a belt and is formed by spirally winding one or more parallel rubber-coated cords, is provided on the radially outer portion of the carcass 20, in other words, on the crown portion. In the tire 10 for a tilting vehicle of this embodiment shown in Fig. 2, the spiral belt 22 is one layer, but it may be two or more layers.

[0031] A tread 24 containing rubber is provided on the outer side of the spiral belt 22 in the tire radial direction, and a side rubber 26 is provided on the outer side of the carcass in the tire width direction.

[0032] 2, the length of the contour of the tread surface in the tire axial cross section is defined as L, and the position along the contour that is L / 8 from the tire equatorial plane CL, which is an example of the tire's maximum diameter portion, is defined as 1 / 8 point T. In this embodiment, in the tread 24, the region axially outward from the 1 / 8 point T is called a shoulder region 24S, and the region between one 1 / 8 point T and the other 1 / 8 point T is called a center region 24C.

[0033] (reinforcement layer) A reinforcing layer 23 is provided between the carcass 20 and the spiral belt 22 to reinforce the crown portion. The reinforcing layer 23 is, for example, a plurality of cords arranged and coated with rubber. The cords are, for example, organic fiber cords, steel cords, etc., but may also be cords made of other materials. Although not shown in the drawings, the reinforcing layer 23 may be disposed on the outer side of the spiral belt 22 in the tire radial direction.

[0034] The reinforcing layer 23 is preferably provided at least on the vehicle-mounted inner side of the tire equatorial plane CL. As an example, the reinforcing layer 23 of the present embodiment is provided between a belt end 22E of the spiral belt 22 on the vehicle-mounted inner side and a 1 / 8 point T on the vehicle-mounted inner side. That is, the tire case (carcass 20, spiral belt 22, reinforcing layer 23) corresponding to the tread 24 has a three-layer structure from the 1 / 8 point T on the inside of the vehicle mounting to the outside of the vehicle mounting, and a four-layer structure from the 1 / 8 point T on the inside of the vehicle mounting to the inside of the vehicle mounting.

[0035] Although the tread 24 of this embodiment does not have any drainage grooves formed therein, drainage grooves may be formed therein as in a normal tire.

[0036] (Action, effect) The tire 10 for a tilting vehicle of this embodiment is configured as described above, and its operation and effects will be described below.

[0037] As shown in FIG. 2, in the tire 10 for a leaning vehicle of this embodiment, a reinforcing layer 23 is provided on the tire radial direction outer side of the carcass 20, and the reinforcing layer 23 is provided between the belt end 22E on the vehicle mounting inner side of the spiral belt 22 and the 1 / 8 point T on the vehicle mounting inner side, that is, the shoulder portion 24S on the vehicle mounting inner side. IN It is provided in response to.

[0038] As a result, the shoulder portion 24S on the inside of the vehicle IN The bending rigidity of the shoulder part on the outside of the vehicle is 24S. OUT The bending stiffness is higher than that of Therefore, the shoulder portion 24S on the inside of the vehicle IN is attached to the outside shoulder of the vehicle 24S OUT The shoulder part 24S on the inside of the vehicle is more resistant to bending deformation than the IN The contact length when the ball touches the ground can be shortened.

[0039] During high-speed turning, as shown in FIG. 1, the shoulder portion 24S on the outer side of the wheel 12 mounted on the vehicle OUT The shoulder portion 24S on the inside of the wheel 14 on the outside of the turning IN In the tire 10 for a leaning vehicle of this embodiment, a large load acts on the shoulder portion 24S on the inside of the wheel 14 on the outside of the turning. IN Since the contact length of the shoulder portion 24S on the inside of the vehicle can be shortened, IN It can suppress slippage on the road surface, and the shoulder part 24S on the inside of the vehicle IN The wear resistance of the material can be improved. In addition, when the end portion of the reinforcing layer 23 on the vehicle mounting outer side is positioned on the vehicle mounting inner side of the 1 / 8 point T on the vehicle mounting inner side, the shoulder portion 24S on the vehicle mounting inner side IN It becomes difficult to increase the bending rigidity of the shoulder portion 24S. IN It becomes difficult to improve the wear resistance of the material.

[0040] In addition, in this tilting vehicle tire 10, the end of the reinforcing layer 23 on the vehicle mounting outer side is terminated at 1 / 8 point T on the vehicle mounting inner side, and the reinforcing layer 23 is not arranged in the center region 24C of the tread 24 between the 1 / 8 point T on the vehicle mounting outer side and the 1 / 8 point T on the vehicle mounting inner side. Therefore, the center region 24C of the tread 24 is arranged in the shoulder portion 24S where the reinforcing layer 23 on the vehicle mounting inner side is arranged further than the 1 / 8 point T on the vehicle mounting inner side. IN Therefore, for example, when the vehicle weight is light or when traveling at low speeds, the ride comfort can be made softer.

[0041] In addition, the shoulder part 24S on the outside of the vehicle OUT In the case of the vehicle, since the reinforcing layer 23 is not provided, the shoulder portion 24S on the inside of the vehicle is IN The shoulder portion 24S of the wheel 12 on the inside of the turn is on the vehicle outer side and has a lower bending rigidity than the wheel 12 on the inside of the turn. OUT In the case of a tire with a tire that has a low load, the cornering force when the tire is running on a dry road can be improved by increasing the contact area, thereby improving cornering performance. In addition, when the reinforcing layer 23 is disposed on the vehicle mounting outer side of the 1 / 8 point T on the vehicle mounting outer side, the shoulder portion 24S on the vehicle mounting outer side OUT This makes it difficult to reduce the flexural rigidity of the tire, making it difficult to increase the contact area with the road surface, which makes it difficult to improve cornering force when driving on dry roads, which decreases at low loads.

[0042] In this embodiment, the carcass 20 is composed of two carcass plies (a first carcass ply 20A and a second carcass ply 20B) as an example, but the number of carcass plies is not limited to two, and may be one, or three or more.

[0043] In this embodiment, the reinforcing layer 23 is provided between the belt end 22E on the inside of the vehicle mounting side and the 1 / 8 point T on the outside of the vehicle mounting side, but the reinforcing layer 23 may extend from the belt end 22E on the inside of the vehicle mounting side to the outside of the vehicle mounting side, and the end on the outside of the vehicle mounting side may be located between the 1 / 8 point T on the outside of the vehicle mounting side and the 1 / 8 point T on the inside of the vehicle mounting side.

[0044] [Second embodiment] Next, a tire 10 for a tilting vehicle according to a second embodiment of the present disclosure will be described with reference to Fig. 3. The second embodiment is a modified example of the first embodiment, and the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof will be omitted. The reinforcing layer 23 of the tire 10 for a tilting vehicle of this embodiment is provided between a belt end 22E on the vehicle mounting inner side of the spiral belt 22 and a 1 / 8 point T on the vehicle mounting outer side. That is, the tire case (carcass 20, spiral belt 22, reinforcing layer 23) corresponding to the tread 24 has a three-layer structure from the 1 / 8 point T on the vehicle mounting outer side to the vehicle mounting outer side, and a four-layer structure from the 1 / 8 point T on the vehicle mounting outer side to the vehicle mounting inner side.

[0045] (Action, effect) The leaning vehicle tire 10 stands upright when the vehicle travels straight. Therefore, when the vehicle travels straight, the leaning vehicle tire 10 mainly comes into contact with the ground between the inner 1 / 8 point mounted on the vehicle and the outer 1 / 8 point mounted on the vehicle, in other words, the center region 24C of the tread 24.

[0046] In the tire 10 for a tilting vehicle of this embodiment, the reinforcing layer 23 is between the belt end 22E on the vehicle mounting inner side of the spiral belt 22 and the 1 / 8 point T on the vehicle mounting outer side, that is, the shoulder portion 24S on the vehicle mounting inner side IN and the center region 24C.

[0047] That is, since the reinforcing layer 23 is disposed in the center region 24C of the tread 24, durability can be improved, for example, during straight high-speed driving or when a heavy vehicle weight causes a high load or stress to act.

[0048] [Third embodiment] Next, a tire 10 for a tilting vehicle according to a third embodiment of the present disclosure will be described with reference to Fig. 4. Note that the same components as those in the first embodiment are given the same reference numerals, and the description thereof will be omitted.

[0049] As shown in Fig. 4, in the leaning vehicle tire 10 of the third embodiment, the second carcass ply 20B extends from the bead core 18 on the vehicle mounting inner side toward the vehicle mounting outer side and terminates at the 1 / 8 point T on the vehicle mounting inner side. In other words, the second carcass ply 20B extends from the shoulder portion 24S on the vehicle mounting inner side IN The tire case corresponding to the tread 24 has a two-layer structure from the 1 / 8 point T on the inside of the vehicle mounting to the outside of the vehicle mounting, and a three-layer structure from the 1 / 8 point T on the inside of the vehicle mounting to the inside of the vehicle mounting.

[0050] As a result, in the tilting vehicle tire 10 of the third embodiment, the shoulder portion 24S on the vehicle mounting inner side IN The bending rigidity of the shoulder part 24S on the outside of the vehicle OUT The bending rigidity of the shoulder part 24S on the inside of the vehicle can be increased. IN The contact length is shortened when the vehicle is fitted to the inside shoulder 24S. IN The wear resistance of the material can be improved.

[0051] In this tilting vehicle tire 10, the second carcass ply 20B has an end on the vehicle mounting outer side that terminates at 1 / 8 point T on the vehicle mounting inner side, and the second carcass ply 20B is not disposed in the center region 24C of the tread 24 between the 1 / 8 point T on the vehicle mounting outer side and the 1 / 8 point T on the vehicle mounting inner side. Therefore, the center region 24C of the tread 24 is separated into a shoulder portion 24S where the second carcass ply 20B is disposed on the vehicle mounting inner side of the 1 / 8 point T on the vehicle mounting inner side. IN Therefore, for example, when the vehicle weight is light or when traveling at low speeds, the ride comfort can be made softer.

[0052] In this embodiment, the end of the second carcass ply 20B on the vehicle mounting inner side is engaged with the bead core 18 on the vehicle mounting inner side, but the end of the second carcass ply 20B on the vehicle mounting inner side does not have to be engaged with the bead core 18 on the vehicle mounting inner side. Further, in the tire 10 for a tilting vehicle of the present embodiment, the reinforcing layer 23 is not provided, but the reinforcing layer 23 may be provided.

[0053] [Fourth embodiment] Next, a tilting vehicle tire 10 according to a fourth embodiment of the present disclosure will be described with reference to Fig. 5. The fourth embodiment is a modified example of the third embodiment, and the same components as those in the third embodiment are denoted by the same reference numerals, and the description thereof will be omitted.

[0054] In this embodiment, the second carcass ply 20B is provided from the bead core 18 on the vehicle mounting inner side to the 1 / 8 point T on the vehicle mounting outer side.

[0055] In the tilting vehicle tire 10 of this embodiment, the second carcass ply 20B extends beyond the maximum diameter portion of the tire to the outer side of the vehicle mounting, and the outer end of the second carcass ply 20B to the outer side of the vehicle mounting terminates at 1 / 8 point T on the outer side of the vehicle mounting. That is, since the second carcass ply 20B is arranged in the center region 24C of the tread 24, durability can be improved, for example, during straight high-speed driving or when a heavy vehicle weight causes a high load or stress to act.

[0056] [Other embodiments] The above describes one example of an embodiment of the present disclosure, but the embodiment of the present disclosure is not limited to the above, and it goes without saying that various modifications can be made without departing from the spirit of the present disclosure.

[0057] In the tire 10 for a leaning vehicle of the above embodiment, a known cross belt layer may be provided instead of the spiral belt 22. Furthermore, although the tire 10 for a leaning vehicle of the above embodiment is a radial tire, it may also be a bias tire.

[0058] In the tire 10 for a tilting vehicle of the first embodiment, one reinforcing layer 23 is provided, but two or more reinforcing layers 23 may be provided. For example, the first reinforcing layer 23 is arranged from one belt end 22E of the spiral belt 22 to the other belt end 22E, and the second reinforcing layer 23 is arranged on the vehicle mounting inner side of the 1 / 8 point T on the vehicle mounting outer side, and the difference in the number of reinforcing layers 23 allows the shoulder portion 24S on the vehicle mounting inner side to be IN The reinforcing layer 23 may be a belt, a breaker, a carcass ply, or the like.

[0059] [Contribution to the United Nations-led Sustainable Development Goals (SDGs)] The SDGs have been proposed to realize a sustainable society. One embodiment of the present disclosure is believed to be a technology that can contribute to "No. 12 - Responsible Consumption and Production" and "No. 13 - Take concrete measures against climate change." [Explanation of symbols]

[0060] 10...tilt type vehicle, 16...bead portion, 18...bead core, 20...carcass, 20A...first carcass ply (first carcass ply), 20B...second carcass ply (other carcass ply), 22...spiral belt (belt), 23...reinforcing layer, 24...tread, CL...tire equatorial plane, T...1 / 8 point

Claims

1. a carcass including one or more carcass plies spanning one bead core embedded in one bead portion and another bead core embedded in the other bead portion; a tread provided on the outer side of the carcass in the tire radial direction; a belt disposed between the carcass and the tread; a reinforcing layer disposed at least on a vehicle-mounted inner side of the tire equatorial plane between the carcass and the tread, where L is the length of a contour of the tread surface in a tire axial cross section and a position of L / 8 along the contour from the tire equatorial plane is defined as a ⅛ point, and the reinforcing layer includes the ⅛ point on the vehicle-mounted inner side; and an end portion of the reinforcing layer on the vehicle mounting outer side is located between the 1 / 8 point on the vehicle mounting outer side and the 1 / 8 point on the vehicle mounting inner side; Tilting vehicle tires.

2. The reinforcing layer has an outer end terminated at the 1 / 8 point on the inner side of the vehicle.

2. The tire for a tilting vehicle according to claim 1.

3. a carcass including a plurality of carcass plies disposed between one bead core embedded in one bead portion and another bead core embedded in the other bead portion; a tread provided on the outer side of the carcass in the tire radial direction; a belt disposed between the carcass and the tread; and an inner carcass portion extending from one bead portion on an inner side fitted to a vehicle has a larger number of carcass plies than an outer carcass portion extending from the other bead portion on an outer side fitted to a vehicle; Tilting vehicle tires.

4. When the length of the contour of the tread surface in the tire axial cross section is L and the position of L / 8 along the contour from the tire equatorial plane is defined as the 1 / 8 point, One of the carcass plies has an inner end portion thereof fastened to the inner bead core of the vehicle mounting side and an outer end portion thereof fastened to the outer bead core of the vehicle mounting side, the other carcass ply has an end portion on a vehicle-mounted inner side anchored to the bead core on a vehicle-mounted inner side, and an end portion on a vehicle-mounted outer side positioned between the 1 / 8 point on a vehicle-mounted outer side of the tire maximum diameter portion and the 1 / 8 point on a vehicle-mounted inner side of the tire maximum diameter portion, 4. The tire for a tilting vehicle according to claim 3.

5. The other carcass ply has an end portion on a vehicle outer side that terminates at the 1 / 8 point on a vehicle inner side.

5. A tire for a tilting vehicle according to claim 4.

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