JPH1071810A - Tire mounting siructure for truck or bus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tire mounting structure for a bus or truck which uses the same tires in the entire vehicle and is additionally capable of rotation. SOLUTION: The tire mounting structure for a truck or bus is designed so that, in the tire mounting positions of the entire vehicle, one tire is diisposed at certain positions respectively and two tires are juxstaposed at other positions respectively. As all tires, the same tire which is higher in rigidity on one side in the width direction in its peripheral surface than on the other side, the respective one tire is disposed in such a way as the side 12 with higher rigidity is situated outside the vehicle, and the respective two tires are disposed in such a way as the sides 12 with higher rigidity adjoin each other.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a truck or bus tire mounting structure.

[0002]

2. Description of the Related Art Automobiles,
In particular, in the case of trucks and buses, it is necessary to mount tires that match the functions of the front wheels and the rear wheels, respectively, in order to sufficiently exhibit the functions of the vehicle.

That is, the front wheels have a role of adjusting the traveling direction of the vehicle. Therefore, in the tire for the front wheel, it is necessary to increase the rigidity of the outer portion of the vehicle, which is subjected to a large load when the vehicle turns. Thereby, it is possible to cope with uneven wear, in which the outer portion of the vehicle is worn early by the load. Therefore, conventionally, in a tire used exclusively for front wheels, a rib pattern is arranged at least on a portion outside the vehicle.

On the other hand, the rear wheels have a role of transmitting driving force and braking force to the road surface. Therefore, it is necessary to mount tires having excellent performance. In addition, wear is easily promoted to transmit the driving force and the braking force, and it is necessary to cope with such wear. Therefore,
In a tire used exclusively for the rear wheels, a block pattern is provided.

As described above, conventionally, dedicated tires suitable for the respective functions have been mounted on the front wheels and the rear wheels. However, when dedicated tires are used in this way, it is not possible to exchange front and rear tires (replacement of tires, rotation). That is, even if a tire having excellent uneven wear resistance is used for the front wheel, a certain degree of uneven wear occurs, so it is considered that the tire is replaced with a rear wheel tire to correct uneven wear and improve tire life. However, when dedicated tires are used, the front and rear tires cannot be replaced.

In order to make it possible to change the tire position, the same tire should be arranged at all the mounting positions. In this case, a tire suitable for the specific function of the front wheel and the rear wheel is used. Cannot be arranged, and as a result, the function of the vehicle cannot be fully exhibited.

An object of the present invention is to mount the same tire having characteristics suitable for both functions of a front wheel and a rear wheel at all mounting positions in order to overcome such a tall event.

[0008]

The present inventor has studied which part of the tire determines the performance when the tire is mounted on a vehicle, and has obtained the following knowledge. That is, in the front wheel tire, a portion having high rigidity is located outside the vehicle by a tire pattern, a rubber composition, or the like, thereby contributing to the improvement of uneven wear resistance and cornering performance. On the other hand, in the rear tire, by arranging a portion having excellent driving force on the outside of the vehicle, it contributes to improvement in turning performance, driving performance, braking performance of the tire, and
When a double wheel, which is a rear wheel mounting method, is considered as a single tire, having a highly rigid portion at the center in the width direction of the tire contributes to an improvement in wear resistance.

Based on the above findings, the inventor of the present invention arranged a portion having excellent uneven wear resistance on one side in the width direction of the tire peripheral surface, and provided a portion having excellent braking performance and driving performance on the other side. The same tires are mounted at all mounting positions of the vehicle, and particularly when mounted on the front wheels, the portion excellent in uneven wear resistance is located outside the vehicle, and When mounting on the rear wheel, the two tires are arranged as a double wheel, and the part with excellent uneven wear resistance is located on the adjacent side of both tires, and on the outer part of the vehicle of the double wheel Has conceived of mounting such that the above-described portion having excellent braking performance and driving performance is located.

That is, in the tire mounting structure according to the first aspect, one tire is disposed at a part of the tire mounting position of the entire vehicle, and two tires are arranged side by side at the remaining part. In the tire mounting structure of a truck or a bus, one tire in the width direction on the circumferential surface of the tire has the same rigidity as that of the other tire, and the tire having the greater rigidity is the vehicle on the one tire side. , And the two tires are arranged such that the sides having higher rigidity are adjacent to each other.

A tire mounting structure according to a second aspect is the tire mounting structure according to the first aspect, wherein the side having the higher rigidity is formed of a rib pattern, and the other side is formed of a block pattern.

According to a third aspect of the present invention, there is provided a tire mounting structure according to the first aspect, wherein the difference in rigidity on the tire peripheral surface is caused by a difference in rubber composition as a material of the tire. It is.

With such a tire mounting structure, a tire mounting position where one tire is mounted, particularly the front wheel, is excellent in directional adjustment performance, uneven wear resistance and turning performance, and a mounting position of a double wheel, particularly a rear wheel. In the above, the driving performance and the braking performance are excellent. Further, when mounted as a compound wheel, a portion having excellent wear resistance is located at the center portion of the compound wheel, that is, a portion adjacent to both tires, so that the wear resistance of the entire compound wheel is improved. Thus, despite the use of the same tire, the functions of the front wheel and the rear wheel can be sufficiently exhibited.

Since the same tire is used throughout the vehicle, the tire can be exchanged between a tire mounting position for mounting one tire and a tire mounting position for mounting as a double wheel. Therefore, for example, even in the case of a tire in which uneven wear has occurred by using the front wheel, uneven wear can be corrected by replacing the tire with the rear wheel. Further, at the time of such replacement, the tire can be turned upside down to reverse the rotational direction, thereby correcting the step wear generated at the time of mounting the front wheel.

Further, when the above-described mounting method is adopted, the tire position can be replaced by moving the wheel position without reassembling the tire and the wheel.

As described above, in the first to third aspects of the present invention, one side in the width direction of the tire circumferential surface has a greater rigidity than the other side. The stiffness may gradually decrease, or the stiffness may change in two stages, three stages, or the like. Even when the stiffness changes in two steps, the width of the region with high stiffness and the width of the region with low stiffness do not have to be the same, for example,
The width of the region having high rigidity may be narrow and the width of the other side may be wide. For example, a wide block pattern may be arranged adjacent to a narrow rib pattern, or another region may be interposed between the rib pattern and the block pattern.

In the mounting structure according to the second aspect, the rib patterns are adjacent to each other at the center of the double wheel. Since there is no deep lateral groove in the rib pattern, rainwater and the like do not concentrate on the intermediate portion of the double wheel, so that the so-called hydroplaning resistance is also improved. That is, when the block patterns are arranged adjacent to each other at the center of the double wheel,
Although the water on the road surface displaced by the tire being grounded on the road surface is concentrated between the two tires through the lateral groove of the block pattern, such a disadvantage can be solved by disposing as described above. Can be.

As is apparent from the above description, the tire used in the present invention has an asymmetrical peripheral surface which is not symmetrical in the width direction and has a large rigidity on one side in the width direction. Therefore, when assembling such a tire to a wheel, it is necessary to make the relative positional relationship with the wheel constant. Therefore, claim 4
As described in the above, a mark made of letters, symbols, figures, coloring, etc. is attached to the side of the tire on which the rigidity is large, and the tire is attached to the wheel such that this side is located on the side of the disk surface of the wheel. Mounting is preferred.
In this case, the tire can be mounted on the wheel using the mark as a clue so that the side surface of the tire with the mark is on the disk surface side of the wheel. The rotation operator should make sure that the disc surface of the wheel is located outside the vehicle at the mounting position where one tire is mounted, and that the disk surfaces of the two wheels with tires are paired at the mounting position of the double wheel. What is necessary is just to mount so that it may be installed.

The same object can be achieved by claim 5. That is, in the fifth aspect, a mark made of characters, symbols, figures, coloring, or the like is provided on a side surface of the tire opposite to the side having higher rigidity so that the side surface is located on the opposite side to the disk surface of the wheel. The tire is attached to a wheel. In this case, the tire can be mounted on the wheel using the mark as a clue so that the side surface of the tire with the mark is on the side opposite to the disk surface of the wheel. The rotation operator should make sure that the disc surface of the wheel is located outside the vehicle at the mounting position where one tire is mounted, and that the disk surfaces of the two wheels with tires are paired at the mounting position of the double wheel. What is necessary is just to mount so that it may be installed.

[0020]

FIG. 1 shows a tire 10 used in the present invention. The tire 10 has a rib pattern 12 extending in the circumferential direction on one side (right side in the drawing) of the circumferential surface of the tire 10. A block pattern 14 is arranged on the opposite side of the tire circumferential surface. And the tire 10
The rib pattern 12 is mounted on the wheel such that the side of the rib pattern 12 is located on the side of the disk surface 16 of the wheel (not shown).

Here, the "rib pattern" refers to a pattern formed of rib-like land portions extending continuously in the circumferential direction and defined by the main groove 13 in the circumferential direction of the tire from other areas. A shallow sipe 15 may extend laterally on this land. Further, the “block pattern” refers to a pattern composed of block-shaped land portions 25 defined by the main grooves 13, 17, 19, 21 and the lateral grooves 23.

In the tire mounting structure of the present invention, the same tire 10 shown in FIG. 1 is used throughout the vehicle.

FIG. 2 shows an example of the arrangement of the tires. One tire 10a, 10a
b, and each one tire 10c, 10d is similarly disposed at both ends of the middle wheel shaft 22. And the rear wheel axle 24
At each end are two tires or two wheels 10
e, 10f; 10g, 10h are attached.

Tires 10a, 10b arranged on front wheel axle 20
Are mounted such that their rib patterns 12, 12 are located outside the vehicle. The same applies to the tires 10c and 10d attached to the middle wheel shaft 22. On the other hand, the two tires 1 attached to one end of the rear wheel axle 24
0e and 10f are arranged so that the rib patterns 12 and 12 are adjacent to each other. That is, these tires 10
The discs 16, 16 of the wheels e, 10f are butted. The block pattern 1 is located on the left side of the tire 10e and on the right side of the tire 10f.
4,14 are located. As a result, the double wheels 10e, 10e
When f is viewed as one tire, the block pattern 14 is located at a position outside the vehicle of the tire, and the rib patterns 12, 12 are located at the center.

The same applies to the two tires 10g and 10h provided on the other end of the rear wheel shaft 24.

Since the tires are mounted as described above, in the four tires 10a, 10b, 10c and 10d mounted on the front wheel axle 20 and the middle wheel axle 22, the rib pattern 12 having excellent rigidity is provided on the outer side of the vehicle. , It is excellent in direction adjustment performance and has high uneven wear resistance.

On the other hand, in two sets of tires 10e, 10f; 10g, 10h arranged on the rear wheel axle 24,
Since the block pattern 14 is arranged outside the vehicle, the driving performance and the braking performance are excellent. Also, when each set of tires is viewed as one tire, the rib patterns 12, 12 are arranged in the center portion of the tire, so that excellent wear resistance is also provided.

When the tire position is to be changed, that is, the rotation is performed, the positions of the tires 10a and 10e are reversed by reversing the positions of the tires 10a and 10e. By doing so, in particular, the tires 10a and 10b of the front wheels are mounted on the rear wheels by reversing their rotation directions,
These tires 10a and 10b are rotated in the reverse direction, and the unevenly worn portions of the front wheels are corrected.

Similarly, the tire 10c and the tire 10g
Is exchanged, and the tire 10d and the tire 10h are exchanged.

3 to 5 show other tire arrangement states. That is, in the case of FIG. 3, only the front wheel and the rear wheel are included, and one tire 10 is provided at each of the tire mounting positions at both ends of the front wheel axle 20,
A pair of tires 10, 10; 10, 10 are arranged at tire mounting positions at both ends of the rear wheel axle 22, respectively, to form a double wheel. In the case of FIG. 4, the front wheel axle 20 and the middle wheel axle 2
2. It has a rear wheel axle 24, and one tire 10 is disposed at each end of the front wheel axle 20, and a double wheel is disposed at each end of the middle wheel axle 22 and the rear wheel axle 24, respectively. Further, in the case of FIG. 5, one tire is disposed as each of a front wheel and a rear wheel, and double wheels are disposed only at both ends of the middle wheel shaft 22. FIG.
Also in the case of ~ 5, when only one tire is mounted at the tire mounting position, the rib pattern area is arranged so as to be located outside the vehicle, and when arranged as a double wheel, the rib pattern area is The two tires are arranged to face each other.

In the above embodiment, the difference in rigidity between one side and the other side on the tire peripheral surface is determined by the rib pattern and the block pattern. Alternatively, a difference in rigidity may be obtained by making the rubber composition, which is a material of the tire, different between one side and the other side of the tire circumferential surface. In this case, according to a conventional method, when molding the tread portion, the high rigidity portion and the low rigidity portion are respectively extruded by separate extruders, and these portions are bonded together in an unvulcanized state in a molding machine. Thereby, a tread portion can be obtained. Further, instead of such a method, the belt on the tire tread portion may be shifted to one side to increase the rigidity on that side.

As described above, since the tire according to the present invention has an asymmetrical peripheral surface, care must be taken when assembling the tire to the wheel. for that reason,
As shown in FIG. 6, for example, "WHEEL DISK SID"
It is appropriate to display characters 17 such as "E" or a figure of a wheel. When the tire 10 is mounted on the wheel 15, the disc surface 16 of the wheel 15 is positioned on the side surface 13 of the tire on which the display 17 is provided. By doing so, in the tire 10 assembled to the wheel 15, the disk surface side of the wheel is the side with high rigidity. Therefore, even the worker who rotates the tire can know the rigid side of the tire by using the position of the disk surface 16 as a clue. That is, at the mounting position where only one tire is mounted, the mounting may be performed so that the disk surface 16 is located outside the vehicle, and at the location of the double wheel, the disk surfaces 16 may be opposed to each other. Such a display 17 may be a symbol or color in addition to the above-mentioned characters and figures, may be formed simultaneously with the tire molding, may be printed on the side surface of the tire, and may be displayed with paint or the like. You may.

Although not shown, the above-described mark is attached to the side surface of the tire opposite to the side having higher rigidity, and when attaching the tire to the wheel, the marked side surface is attached to the wheel. May be mounted on the opposite side of the disk surface. In this case as well, the rotation operator makes sure that the disc surface of the wheel is positioned outside the vehicle at the mounting position where one tire is mounted, and that the two wheels with tires are mounted at the mounting position of the double wheel. What is necessary is just to mount so that disk surfaces may be opposed.

[0034]

Since the same tire is used for the entire vehicle, the tire can be rotated more than the conventional one. As a result, the life of the tire can be improved as a whole.

In addition, the performance required for each of the front and rear tires can be achieved at a higher level than conventional tires.

Since the same tire is used, the management of the spare tire is easy.

Further, since a region having high rigidity is arranged at the center of the compound wheel when the compound wheel is mounted, it is advantageous in abrasion resistance.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing a tire peripheral surface used in a tire mounting structure of the present invention.

FIG. 2 is a schematic diagram showing an example of a tire arrangement state of the present invention.

FIG. 3 is a schematic view showing another arrangement state.

FIG. 4 is a schematic view showing still another arrangement state.

FIG. 5 is a schematic diagram showing still another arrangement state.

FIG. 6 is a perspective view showing a positional relationship between a tire and a wheel.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Tire 12 Rigid part in tire peripheral surface 14 Other parts

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code Agency reference number FI Technical display location B60C 11/04 G

Claims (5)

[Claims] 1. A truck or bus tire mounting structure in which one tire is disposed at a part of a tire mounting position of the entire vehicle, and two tires are disposed in parallel at the remaining part. As the tire, one side in the width direction of the peripheral surface is the same tire having greater rigidity than the other side, and each one of the tires is disposed such that the side having the greater rigidity is located outside the vehicle, The tire mounting structure for a truck or a bus, wherein the two tires are arranged such that sides having higher rigidity are adjacent to each other. 2. The truck or bus tire mounting structure according to claim 1, wherein the side having the higher rigidity is formed of a rib pattern, and the other side is formed of a block pattern. 3. The truck or bus tire mounting structure according to claim 1, wherein the difference in rigidity on the tire peripheral surface is caused by a difference in rubber composition as a material of the tire. 4. A mark made of characters, symbols, figures, coloring, and the like is attached to a side surface of the tire on the side with higher rigidity,
The truck or bus tire mounting structure according to any one of claims 1 to 3, wherein the tire is mounted on the wheel such that the side surface is located on the disk surface side of the wheel. 5. A mark made of characters, symbols, figures, coloring, or the like is provided on a side surface of the tire opposite to the side having higher rigidity so that the side surface is located on a side opposite to a disk surface of the wheel. The tire mounting structure for a truck or a bus according to any one of claims 1 to 3, wherein the tire is mounted on a wheel.