JP2005041380A - Solid tire wheel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a solid tire having small rotation resistance and cushioning property. <P>SOLUTION: In a solid tire wheel having the solid tire 1 and a tire supporting element 2 for supporting the solid tire 1, a slit 8 is provided such that the slit 8 elongates from the middle portion of the inner peripheral surface 9 of the solid tire 1 in the direction of the tire axis to the middle portion of the solid tire 1 in the radially outward direction of the solid tire 1. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a wheel of a solid tire.

Tires can be broadly classified into pneumatic tires, solid (solid) tires, and hollow parts (hollow tires). ,
As a wheel provided with a hollow tire, there is a wheel as shown in FIG. 6, and this wheel has a hollow tire 51 having a hollow portion 50 and a tire support 52 for supporting the hollow tire 51, and a tire support is provided. The hollow tire is supported by a rim 53 provided on the body 52. (For example, patent document 1).
FIG. 7 shows a wheel provided with a solid tire. The wheel includes a solid tire 54 made of, for example, a pure rubber lump, and a tire support 52 that supports the solid tire 54. The solid tire 54 is supported by a rim 53 provided on the tire support 52.
JP 2003-54227 A

In the case of a wheel equipped with a hollow tire, when the hollow tire rides on a curb or the like and an excessive load is applied to the hollow tire, the rigidity of the side and tread portions is insufficient, so the deflection deformation of the hollow tire is larger than that of the latter solid tire. Although the cushioning property is good, there is a problem that the rotational resistance of the tire against the ground is larger than that of the solid tire.
In the case of a wheel equipped with a solid tire, when the solid tire rides on a curb or the like and an excessive load is applied to the solid tire, the rotation resistance of the tire against the ground can be reduced compared to the former hollow tire, but the cushion is compared with the hollow tire. There is a problem of getting worse.

  In view of the above problems, an object of the present invention is to provide a solid tire having cushioning properties while suppressing an increase in the rotational resistance of the tire.

The technical means of the present invention for solving this technical problem includes a solid tire and a solid tire wheel provided with a tire support that supports the solid tire, in the tire axial direction of the inner peripheral surface of the solid tire. A slit extending from the midway portion toward the radially outward direction to the midway portion in the radial direction of the solid tire is provided.
According to the present invention, when an excessive load is applied to the solid tire, the slit opens. For example, when the solid tire gets over the curb and the solid tire is overloaded, the slit opens. Therefore, absorption and relaxation can be achieved.

At this time, the solid tire has higher tire rigidity than the hollow tire, and the deformation (deflection) amount of the solid tire is smaller than that of the hollow tire, so that an increase in rotational resistance of the tire can be suppressed as compared with the hollow tire.
Another technical means of the present invention for solving this technical problem is a solid tire provided with a solid tire and a tire support that supports the solid tire, and a tire on an inner peripheral surface of the solid tire. A slit extending from the midway portion in the axial direction to the midway portion in the radial direction of the solid tire in the radially outward direction is provided to divide the solid tire into a crotch shape in the tire axial direction.

According to the present invention, when an excessive load is applied to the solid tire, the divided portions of the solid tire divided into two forks are deformed in the tire axial direction so that the slits are opened. In the same manner as described above, the impact when the solid tire gets over the curb and an excessive load is applied to the solid tire can be absorbed and reduced by opening the slit. At this time, since the deformation (deflection) amount of the solid tire is smaller than that of the hollow tire, an increase in the rotational resistance of the tire can be suppressed as compared with the hollow tire.
Another technical means of the present invention for solving this technical problem is a solid tire provided with a solid tire and a tire support that supports the solid tire, and a tire on an inner peripheral surface of the solid tire. A slit extending from the midway portion in the axial direction to the midway portion in the radial direction of the solid tire is provided to divide the solid tire into a crotch shape in the tire axial direction, and is divided into a crotch shape in the tire axial direction by the slit. Further, the opposite sides of the solid tire in the axial direction are in contact with each other.

Another technical means of the present invention for solving this technical problem is a solid tire provided with a solid tire and a tire support that supports the solid tire, and a tire on an inner peripheral surface of the solid tire. A slit extending from the midway portion in the axial direction to the midway portion in the radial direction of the solid tire is provided to divide the solid tire into a crotch shape in the tire axial direction, and is divided into a crotch shape in the tire axial direction by the slit. In other words, the tire axially facing portions of the solid tire are separated from each other.
Another technical means of the present invention for solving this technical problem is a solid tire provided with a solid tire and a tire support that supports the solid tire, and a tire on an inner peripheral surface of the solid tire. A slit extending from the midway portion in the axial direction to the midway portion in the radial direction of the solid tire is provided to divide the solid tire into a crotch shape in the tire axial direction, and is divided into a crotch shape in the tire axial direction by the slit. In addition, the opposite sides of the solid tire in the axial direction of the tire are in contact with each other, and there is a slight cavity at a branch portion that divides the solid tire into a crotch shape in the axial direction of the tire.

  Another technical means of the present invention to solve this technical problem is that 0.2 ≦ L, where D is the radial tire width of the solid tire and L is the radial length of the slit. /D≦0.8.

  By providing a slit that extends from the mid-axis direction of the tire on the inner peripheral surface of the solid tire to the mid-diameter direction of the solid tire in the radially outward direction, it is possible to suppress an increase in the rotational resistance of the tire and to apply to the solid tire. Impact can be reduced.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1-3 have shown the wheel of the solid tire of 1st Embodiment.
As shown in FIG. 1, this wheel includes a solid tire 1 and a tire support 2 that supports the solid tire 1, and includes a silver car wheel (welfare vehicle), a forklift wheel, and a golf cart wheel. Etc. are used.
1 to 3 and 5, the left and right direction in the drawing (arrow a direction in the drawing) is the tire axial direction, and the direction orthogonal to the tire axial direction (arrow b direction in the drawing) is the radial direction.

The solid tire 1 is a tire that is formed of a rubber-based material and does not apply air pressure to the inside thereof. The solid tire 1 includes a mounting portion 4 that is mounted on the tire support 2 and a tread portion 6 that has a tread surface 5 that contacts the ground. Have. The mounting portion 4 is formed so that the width in the tire axial direction of the mounting portion 4 is smaller than the width in the tire axial direction of the tread portion 6, and is formed so as to be mountable on the rim portion 10 of the tire support 2. ing.
When the width in the tire axial direction of the mounting portion 4 is B and the width in the tire axial direction of the tread portion 6 is A, the tire of the mounting portion 4 satisfies 0.5 ≦ B / A ≦ 1.0. The width B in the axial direction is preferably set. That is, the width of the mounting portion 4 is preferably set to 50% or more and 100% or less of the tire width A in the tire axial direction.

The mounting portion 4 is integrated with the tread portion 6, and the inner side in the radial inner direction of the integrated solid tire 1 is configured to be bifurcated in the tire axial direction from the center of the solid tire 1. ing.
In other words, the solid tire 1 extends from the midway portion in the tire axial direction of the inner peripheral surface 9 of the solid tire 1 to the midway portion in the radial direction of the solid tire 1 in the radially outward direction. A slit-like slit 8 is provided to divide it into shapes.
As shown in FIGS. 1 and 2, the slit 8 extends from the center in the tire axial direction of the inner peripheral surface 9 of the solid tire 1 to the radially middle portion of the solid tire 1 in the radially outward direction, and extends in the circumferential direction. It is provided in an annular shape over the circumference, and the cross section of the slit 8 is linear. When the length of the slit 8 from the inner peripheral surface 9 of the solid tire 1 to the midway portion in the radial direction of the tire (the bifurcated branch point P of the solid tire 1) is L and the tire width in the radial direction is D, 0.2 The length L of the slit 8 is set so that ≦ L / D ≦ 0.8. That is, the length L of the slit 8 is set to 20% or more and 80% or less of the tire width D in the radial direction.

The tire support 2 is provided with a two-part rim portion 10 on which the solid tire 1 is mounted. The wheel 11 is formed in a wheel shape, and one wheel rim 10a is formed on the outer peripheral portion, and the wheel 11 And the other divided rim 10b which is detachably attached via the fastener 12.
The divided rims 10a and 10b are each provided with a seat portion 14 extending in the tire axial direction along the mounting portion 4, a rising portion 15 rising radially outward from the seat portion 14, and an inward direction in the tire axial direction from the rising portion 15. An extending folded portion 16 is formed, and an attachment groove 17 for attaching the mounting portion 4 of the solid tire 1 is formed by these.

  Accordingly, the mounting portion 4 of the outer portion 19 divided from the approximate center of the tire to the outer side in the tire axial direction is fitted into the mounting groove 17 of the split rim 10a on the wheel 11 side, and divided from the approximate center of the tire to the inner side in the tire axial direction. The mounting portion 4 of the inner portion 20 is fitted with the mounting groove 17 of the split rim 10b on the side to be mounted on the wheel 11, and the split rim 10b is mounted on the wheel 11 so that the outer portion 19 of the solid tire 1 is mounted. And the inner portion 20 of the solid tire 1 are attracted to each other and sandwiched between the rim portions 10 so that the solid tire 1 is supported by the tire support 2 so as not to come off in the tire axial direction and radially outward direction. .

As described above, when the solid tire 1 is mounted on the tire support 2, the facing portion 22 (facing surface) of the outer portion 19 of the solid tire 1 that faces the inner portion 20 of the solid tire 1 and the outer side of the solid tire 1. The facing portion 23 (facing surface) of the inner portion 20 of the solid tire 1 facing the portion 19 is in contact with each other without any gap over the entire surface.
As shown in FIG. 3, when the tread portion 6 of the solid tire 1 is grounded to the ground G or the like and a load (excessive load) of a predetermined level or more is applied to the solid tire 1, the solid tire is associated with the magnitude of the excessive load. The opposing portion 22 of the outer portion 19 of the solid tire 1 is deformed in a curved shape from the substantially central portion in the radial direction of the opposing portion 22 of the outer portion 19 to the outer side in the tire axial direction, and is opposed to the inner portion 20 of the solid tire 1. The facing portion 23 of the inner portion 20 of the solid tire 1 is curved inward in the tire axial direction from the substantially central portion in the radial direction of the portion 23, and the slit 8 in the portion where an excessive load is applied opens in the tire axial direction. Thus, a slit opening 24 is formed in the solid tire 1. That is, the slit 8 of the solid tire 1 is configured to form a slit opening 24 corresponding to an excessive load in the solid tire 1 when a predetermined load or more is applied. The slit opening 24 opens large when an excessive load is large and opens small when the excessive load is small.

Therefore, when an excessive load is applied to the solid tire 1, the slit 8 opening is formed, whereby the cushioning property of the solid tire 1 can be improved and the impact force applied to the solid tire 1 can be reduced. .
Further, when the tread portion 6 of the solid tire 1 is grounded to the ground G or the like and an excessive load is applied to the solid tire 1, a slit opening 24 is formed inside the solid tire 1, but the deformation of the solid tire 1 due to the excessive load is caused. The amount of contact is small and the contact area of the tread portion 6 with respect to the ground G is almost the same as in the state where the slit opening 24 is not formed (the state shown in FIG. 1), so the rotational resistance of the solid tire 1 does not increase.

FIG. 4 shows the wheels of the solid tire 1 according to the second embodiment.
The solid tire 1 of this wheel extends from the midway portion in the tire axial direction of the inner peripheral surface of the solid tire 1 to the radially midway portion of the solid tire 1 in the radially outward direction. When the solid tire 1 is mounted on the tire support 2, the facing portion 22 of the outer portion 19 of the solid tire 1 and the facing portion 23 of the inner portion 20 of the solid tire 1 are provided. A gap S is formed between the tire axial directions. That is, the slit 8 extending from the midway portion in the tire axial direction of the inner peripheral surface 9 of the solid tire 1 to the midway portion in the radial direction of the solid tire 1 has a gap. The gap between the slits 8 is set to about 1 mm to 5 mm. Other points are the same as those of the first embodiment.

Therefore, since the gap S is formed between the facing portion 22 of the outer portion 19 of the solid tire 1 and the facing portion 23 of the inner portion 20 of the solid tire 1, as shown in Table 1 described later, the gap Compared to the wheels of the solid tire 1 of Example 1 without S, it is possible to reduce the impact force when an excessive load is applied to the solid tire 1 by an amount corresponding to the clearance S.
FIG. 5 shows the wheels of the solid tire 1 according to the third embodiment.
The solid tire 1 of the wheel extends from the midway portion in the tire axial direction of the inner peripheral surface 9 of the solid tire 1 to the midway portion in the radial direction of the solid tire 1 in the radially outward direction. When the solid tire 1 is mounted on the tire support 2, the facing portion 22 of the outer portion 19 of the solid tire 1 and the facing portion 23 of the inner portion 20 of the solid tire 1 are provided. Most of these are in contact with each other, and a small cavity 26 (for example, about 1 mm to 5 mm) is formed in a branch portion that divides the solid tire 1 into a crotch shape in the tire axial direction.

The hollow portion 26 is located in the center portion in the tire axial direction and is provided in an annular shape over the entire circumference in the circumferential direction. The outer diameter in the tire axial direction is slightly smaller than the inner diameter in the tire axial direction. The cross-sectional view becomes a substantially elliptical shape. That is, the cavity 26 has a cavity width that increases from the branch portion (branch point P) in the radial direction, and narrows from the midway portion to the radial direction. Other points are the same as those of the first embodiment.
Therefore, when an excessive load is applied to the solid tire 1, the stress applied to the branch portion can be relaxed, and the durability of the solid tire 1 can be improved.

  Table 1 shows the first embodiment (Example 1), the second embodiment (Example 2), the conventional hollow tire (the tire as shown in FIG. 6 having a hollow portion), the conventional Test tires of solid tires (solid tires made of pure rubber lump without slits as shown in Fig. 7), and comparing impact force and rotational resistance when overcoming protrusions such as curbs It is. The impact force of each tire in Table 1 is obtained by indexing the impact force of other tires with the impact force of the solid tire of Conventional Example 2 as 100 (reference). In FIG. 4, the rotational resistance of the hollow tire of Conventional Example 1 is taken as 100 (reference), and the rotational resistance of other tires is indexed. Table 1 also shows that the smaller the index, the smaller the impact force and rotational resistance compared to the reference tire.

  As shown in Table 1, in the hollow tire of the conventional example 1, the impact force decreases but the rotational resistance tends to increase. In the solid tire of the conventional example 2, the impact force increases but the rotational resistance tends to decrease. is there. On the other hand, in the solid tire 1 provided with the slits 8 of Example 1 of the present invention, the impact force is smaller than that of the solid tire of Conventional Example 2, and the rotational resistance can be made smaller than that of the hollow tire of Conventional Example 1. it can. Further, if a gap is provided in the slit 8 as in Example 2 of the present invention, the impact force can be reduced, and no gap is provided in the slit 8 as in Example 1 of the present invention (facing in the tire axial direction). When the part sides are brought into contact with each other, the rotational resistance can be reduced.

According to these configurations, during normal driving (when no excessive load is applied), the slit 8 is not opened and the rotational resistance is small, so that there is little energy loss and the fuel efficiency of a vehicle with wheels attached can be improved. In addition, when the vehicle rides on a curb or the like and receives an impact, the slit 8 opens flexibly and absorbs and reduces the impact force, so that the impact on the driver who operates the vehicle is suppressed and the ride comfort is improved. The durability of the vehicle can be improved.
Further, since the length L of the slit 8 is set to 20% or more and 80% or less of the tire width D in the radial direction, the slit opening 24 is easily formed when an excessive load is applied.

  The present invention is not limited to the above-described embodiment, and can be appropriately modified. For example, in the first embodiment, the cross section of the slit 8 is linear, but it may be curved when viewed in cross section.

It is sectional drawing which shows 1st Embodiment of the wheel of the solid tire which concerns on this invention. It is a side view showing a 1st embodiment of a wheel of a solid tire concerning the invention in this application. It is sectional drawing when an excessive load is applied to the solid tire. It is sectional drawing which shows 2nd Embodiment of the wheel of the solid tire which concerns on this invention. It is sectional drawing which shows 3rd Embodiment of the wheel of the solid tire which concerns on this invention. It is sectional drawing of the wheel provided with the conventional hollow tire. It is sectional drawing of the wheel provided with the conventional solid.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Solid tire 2 Tire support body 4 Mounting part 5 Tread surface 6 Tread part 8 Slit 9 Inner peripheral surface of solid tire 10 Rim S Clearance D Radial width of solid tire L Radial length of slit

Claims (7)

In a solid tire and a solid tire wheel provided with a tire support that supports the solid tire,
A wheel of a solid tire, wherein a slit is provided extending from a midway portion in the tire axial direction of the inner peripheral surface of the solid tire to a radially midway portion of the solid tire in a radially outward direction. In the solid tire and the wheel of the solid tire provided with the tire support that supports the solid tire,
A slit extending in the radial direction of the solid tire from the midway portion in the tire axial direction on the inner circumferential surface of the solid tire to the radially midway portion of the solid tire is provided to divide the solid tire into a crotch shape in the tire axial direction. Features a solid tire wheel. In the solid tire and the wheel of the solid tire provided with the tire support that supports the solid tire,
A slit extending in the radial direction of the solid tire from the midway portion in the tire axial direction of the inner peripheral surface of the solid tire to the radially intermediate portion is provided to divide the solid tire into a crotch shape in the tire axial direction. A wheel of a solid tire characterized in that the tire axial direction facing portions of the solid tire divided into crotches in the tire axial direction are in contact with each other. In the solid tire and the wheel of the solid tire provided with the tire support that supports the solid tire,
A slit extending in the radial direction of the solid tire from the midway portion in the tire axial direction of the inner peripheral surface of the solid tire to the radially intermediate portion is provided to divide the solid tire into a crotch shape in the tire axial direction. A solid tire wheel characterized in that the tire axial direction facing portions of the solid tire divided into crotch shapes in the tire axial direction are separated from each other. In the solid tire and the wheel of the solid tire provided with the tire support that supports the solid tire,
A slit extending in the radial direction of the solid tire from the midway portion in the tire axial direction of the inner peripheral surface of the solid tire to the radially intermediate portion is provided to divide the solid tire into a crotch shape in the tire axial direction. The solid tires divided into crotch shapes in the tire axial direction are in contact with each other in the tire axial direction opposite side, and the solid tire has a slight cavity at the branching portion divided into the crotch shape in the tire axial direction. Features a solid tire wheel.   The radial width of the solid tire is D, and the length of the slit in the radial direction is L, 0.2 ≦ L / D ≦ 0.8. The wheel of the solid tire in any one of -5. The solid tire has a mounting portion to be mounted on a tire support, and a tread portion having a tread surface,
The tire width in the tire axial direction of the tread portion is A, and the width in the tire axial direction of the mounting portion is B, 0.5 ≦ B / A ≦ 1.0. Item 7. A solid tire wheel according to any one of Items 1 to 6.

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