JP2003170701A - Wheel having rubber - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an inexpensive wheel having rubber that prevents raising and carrying of mud and has light weight and high strength. <P>SOLUTION: A disk part 20 of the wheel 10 having the rubber comprises a first disk part 23 mounted to a machine body and a second disk part 21 disposed radially outside the first disk part 23 and fastened to the first disk part 23 via a bolt and a nut. The first disk part 23 mounted to the machine body and applied with a strong force is made thicker than the second disk part 21 radially outside thereof, so that deformation due to stress or the like can be prevented. The second disk part 21 is disposed radially outside the first disk part 23 and the applied force is weaker than that to the first disk part 23, so that the thickness of the second disk part 21 can be thinner than that of the first disk part 23 while preventing the deformation. The thickness of the disk part 20 of the wheel 10 having the rubber is partially changed, so that the weight can be reduced while securing the strength. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rubber wheel, and more particularly to a rubber wheel used for traveling on a mud or a paddy field.

[0002]

2. Description of the Related Art Conventionally, rubber-equipped wheels used for running on mud and paddy fields are disclosed in JP-A-8-2202 and JP-A-8-2203 for the purpose of connecting a wheel body and an axle. A configuration using a cylindrical boss along the axle direction is disclosed.

In such a wheel with rubber, the number of parts is large, the manufacturing unit price is high, and several parts are combined to be manufactured. Therefore, variations in assembling accuracy occur when assembling each part, and welding occurs. There is a problem that the accuracy of the assembled product varies due to the heat generated.

Further, the spoke type rubber wheel as disclosed in JP-A-8-2202 has a problem that mud is lifted and dropped between the spokes.

[0005]

As a wheel with rubber that solves the above problems, for example, Japanese Patent Laid-Open No. 2000-2385.
JP-A-04-04 discloses a wheel with rubber in which the disk portion is made of a single disk-shaped pressed sheet metal.

However, since the disk portion is formed into a disk shape, the strength due to the side force is reduced, and the plate thickness must be increased as a whole. Therefore, the weight is increased and the cost cannot be reduced. There was a problem.

Further, Japanese Unexamined Patent Publication No. 2001-30701 discloses a wheel with rubber in which a disk portion is divided into two pieces, that is, an inner side and an outer side in the radial direction. there were.

In consideration of the above facts, an object of the present invention is to obtain an inexpensive rubber wheel having a high strength, which prevents lifting and carrying of mud.

[0009]

According to a first aspect of the present invention, there is provided a first disk portion which is mounted on a machine body and which is radially inside, and the first disk portion which is provided radially outside the first disk portion. An annular second disk portion that overlaps with a part of the outer peripheral side in the radial direction in the radial direction, and an annular rubber portion integrally formed on the outer peripheral side of the second disk portion, A rubber-equipped wheel comprising a connecting means for connecting the disc portion and the second disc portion at an overlapping portion, wherein the first disc portion comprises:
It is characterized in that it is formed thicker than the second disk portion.

Next, the operation of the rubber wheel according to claim 1 will be described.

The disk-shaped disk portion extending from the assembly portion to the machine body on the inner diameter side to the rubber portion on the outer diameter side mainly holds mud at the time of turning so that the mud does not come up and the conventional spokes are used. It is possible to solve the problem that the mud lumps are placed on the spokes, which was a problem with the type, and carried and dropped.

Since the moment due to the lateral force during traveling is received by the disk cross section, the stress level becomes very large with respect to the torque applied to the entire disk in the circumferential direction by the axle. Further, the disc portion has a greater shearing force on the inner side in the radial direction than on the outer side in the radial direction.

In the rubber wheel according to the first aspect of the present invention, the first disk portion on the radially inner side, which is mounted on the machine body and exerts a large force, is made thicker than the second disk portion on the radially outer side. It is possible to prevent deformation due to.

Since the second disc portion is radially outward of the first disc portion and the acting force is smaller than that of the first disc portion, the plate thickness of the first disc portion is prevented while preventing deformation.
It can be thinner than the disc part.

As described above, in the rubber wheel according to the first aspect, the thickness of the disk portion is partially changed,
It is possible to reduce weight while ensuring strength.

According to a second aspect of the present invention, in the wheel with rubber according to the first aspect, the outer diameter of the second disk portion is set within a range of 80 to 95% of the wheel outer diameter. And the radial dimension of the overlapping part is 2
It is characterized by being set within the range of 0 to 70 mm.

Next, the operation of the rubber wheel according to the second aspect will be described.

By setting the outer diameter of the second disk portion within the range of 80 to 95% of the wheel outer diameter, the strength of the second disk portion can be secured and the amount of the member used can be suppressed. .

Further, the dimension of the overlapping portion of the first disc portion and the second disc portion in the wheel radial direction is 20 to 7
By setting it within the range of 0 mm, the strength of the connecting portion can be secured.

The size of the overlapped portion is 2
If it is less than 0 mm, the size of the overlapping portion is too small, and the strength of the connecting portion cannot be secured.

On the other hand, the dimension of the overlapped portion is 7
If it exceeds 0 mm, the inner diameter of the second disk portion becomes unnecessarily small, and the amount of members used in the second disk portion increases, leading to an increase in weight.

According to a third aspect of the present invention, in the rubber-equipped wheel according to the first or second aspect, the first disk portion has a radial outer side than a mounting portion to the machine body.
It is characterized in that at least one refraction portion having a refracted shape when viewed in a cross section along the rotation axis is formed.

Next, the operation of the rubber wheel according to claim 3 will be described.

By refracting part of the first disk portion in this way, the strength of the first disk portion can be improved. Therefore, it is possible to reduce the thickness by reducing the thickness while ensuring the required strength.

According to a fourth aspect of the invention, in the wheel with rubber according to any one of the first to third aspects, the second disk portion is radially inward of the rubber portion, It is characterized in that at least one refraction portion having a refracted shape when viewed in a cross section along the rotation axis is formed.

Next, the operation of the rubber wheel according to the fourth aspect will be described.

By refracting part of the second disk portion in this manner, the strength of the second disk portion can be improved. Therefore, it is possible to reduce the thickness by reducing the thickness while ensuring the required strength.

According to a fifth aspect of the present invention, in the wheel with rubber according to the fourth aspect, the bent portion is formed in the second disk portion in the vicinity of the connecting means. There is.

Next, the operation of the wheel with rubber according to the fifth aspect will be described.

Among the second disk portions, the most force is applied in the vicinity of the connecting means, so it is preferable to provide a bent portion to improve the strength.

[0031]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS [First Embodiment] A first embodiment of a wheel with an elastic body of the present invention will be described with reference to FIGS.

As shown in FIGS. 1 and 2, an elastic body-equipped wheel 10 of this embodiment has bolts 16 attached to an end portion 14A of a hub 14 provided on an axle 13 of a body 12 such as a rice transplanter.
And a disk portion 20 attached by a fastening member such as a nut 18, and a rubber portion 22 (outer diameter D ₀ ) connected to the disk portion 20.

The disc portion 20 is composed of a first disc portion 23 on the inner diameter side and a second disc portion 21 on the outer diameter side which is separate from the first disc portion 23.

The outer diameter D ₁ of the first disk portion 23 is second
The inner diameter D ₂ of the disc portion 21 is set small, and the vicinity of the outer periphery of the first disc portion 23 and the vicinity of the inner periphery of the second disc portion 21 overlap by a certain width. (Structure of the first disk portion) The first disk portion 23 is a portion to be attached to the hub 14 to which the rotational driving force (torque) is transmitted, and therefore strength is required.

The first disc portion 23 of this embodiment is formed by press-forming a steel plate having a thickness of 9 mm in an annular shape, and has an outer diameter D ₁ of 350 mm. The first disc portion 23
May be synthetic resin instead of metal, and any material may be used as long as it is suitable in terms of strength.

The first disk portion 23 has an annular mounting surface 23A which is perpendicular to the axial center of the hub 14 when mounted on the end portion 14A of the hub 14, and on the fuselage side of the mounting surface 23A and on the outer periphery. Annular flange portion 2 arranged on the side
3B, and a bending portion 23C that connects the mounting surface 23A and the flange portion 23B.

The mounting surface 23A has an end portion 14A of the hub 14.
A circular inlay hole 25 into which the circular boss 14B provided in is fitted is formed, and a plurality of bolt insertion holes 30 through which the bolts 16 are inserted are formed around the circular inlay hole 25 at equal intervals.

A plurality of bolt insertion holes (not shown in FIG. 2 because they overlap bolt insertion holes 29 described later) are formed in the flange portion 23B at equal intervals on a pitch circle of diameter D _3. There is. (Structure of Second Disk Section) The second disk section 21 is formed in an annular shape.

The second disc portion 21 and the first disc portion 23 are also included.
Similarly to the above, the steel plate is press-formed into an annular shape, but is thinner than the first disk portion 23.

The second disk portion 21 of this embodiment has a thickness of 3.2 mm, an outer diameter D ₄ of 820 mm and an inner diameter D ₂ of 2.
It is 90 mm. The second disk portion 21 may be made of synthetic resin instead of metal, and may be made of any material as long as it has a suitable strength.

The second disc portion 21 has an annular first portion which is provided in parallel with the flange portion 23B of the first disc portion 23.
A portion 21A, an annular second portion 21B arranged on the body side of the first portion 21A and on the outer peripheral side, and a first portion 21A.
And a second refraction part 21C for connecting the second part 21B.

The first portion 21A of the second disc portion 21 is
A part of the inner side of the radius is the flange portion 2 of the first disk portion 23.
Superposed with 3B.

In the first portion 21A of the second disk portion 21, as in the case of the first disk portion 23, a plurality of bolt insertion holes 29 are formed at equal intervals on a pitch circle of diameter D ₃ .

Second disc portion 21 and first disc portion 23
Means a bolt (M12 in the present embodiment) 26 into which the bolt insertion hole of the first disc portion 23 and the bolt insertion hole of the second disc portion 21 are inserted, and a nut (M12 in the present embodiment).
They are connected by screwing and tightening 28.

A flat washer 40 is interposed between the head of the bolt 26 and the first disk portion 23, and a spring washer 41 is interposed between the nut 28 and the second disk portion 21.

The second portion 21B has an annular flat portion 21Ba extending in the radial direction and an extending portion 21B extending from the radially outer end of the flat portion 21Ba toward the fuselage side across the equatorial plane CL.
b.

A part of the flat surface portion 21Ba on the outer peripheral side and the extended portion 21Bb form a rubber mounting portion 27, and the rubber portion 22 is vulcanized and molded. (Structure of Rubber Part) The rubber part 22 has a cross-sectional shape that widens from the boundary part 24 with the flat part 21Ba toward the outer side in the radial direction.

At the boundary portion 24 with the rubber portion 22, the plane portion 21Ba is arranged on the side of the machine body opposite to the equatorial plane CL and on the side of the machine body relative to the outermost portion of the rubber portion 22 on the side of the machine body in the width direction. .

When measured in the axial direction, the distance L from the outermost portion in the width direction of the rubber portion 22 on the side opposite the machine body to the flat portion 21Ba is 5
It is preferable to set it within the range of 30 mm.

FIG. 3 is a development view of the tread portion and the side portion of the rubber portion 22. In FIG. 3, the tread surface of the tread portion is between the two-dot chain line and the side portion is outside the two-dot chain line.

As shown in FIGS. 2 and 3, the rubber portion 22
A large number of lugs 34 are formed on the tread portion of.

These lugs 34 extend from the equatorial plane CL to the outer side in the tire axial direction of the tread perpendicularly to the equatorial plane CL, and are arranged left-right staggered in the circumferential direction at substantially equal intervals.

The equator side of the lug 34 is connected to a rib 36 of a predetermined length extending in the tire circumferential direction on the equator plane CL.

The adjacent lug 34 on the same side with respect to the equatorial plane CL and the portion surrounded by the lug 34 form a groove 38.

As shown in FIG. 4, the lug 34 has an equatorial plane C.
The cross-sectional shape cut along a plane parallel to L is substantially symmetrical with respect to the center line 34C of the lug 34 in any cross section in the wheel axial direction.

The tire circumferential width L ₁ of the tread surface portion 34B of the lug 34 is gradually reduced outward in the axial direction. (Operation) Next, the operation of the rubber wheel 10 of the present embodiment will be described.

First, since the moment due to the lateral force is received by the disk cross section, the stress level becomes very large with respect to the torque applied from the axle 13 in the circumferential direction on the entire disk. Further, the disc portion 20 has a larger shearing force on the inner side in the radial direction than on the outer side in the radial direction.

In the rubber-equipped wheel 10 of the present embodiment, the first disk portion 23 on the inner side in the radial direction also has a thick second disk portion 21 of 9 mm, so that the deformation due to the stress or the like can be prevented.

On the other hand, the second disk portion 21 is located radially outward of the first disk portion 23, and the shearing force acting on the second disk portion 21 is smaller than that of the first disk portion 23. 3.2mm thinner than 1 disk part 23
Can be

By setting the outer diameter of the second disk portion 21 within the range of 80 to 95% of the outer diameter of the wheel, it is possible to secure the strength and to suppress the amount of thick steel plate used.

First disc portion 23 and second disc portion 21
The dimension OL in the wheel radial direction of the overlap portion with is 2
Bolt 2 by setting within the range of 0-70mm
6 and the nut 28 can secure the strength of the connecting portion.

The dimension OL of the above-mentioned overlapped portion
Is less than 20 mm, the size of the overlapping portion is too small, and the strength of the connecting portion cannot be secured.

On the other hand, the size OL of the overlapped portion
When the value exceeds 70 mm, the inner diameter of the second disc portion 21 becomes too small, and the amount of steel plate used in the second disc portion 21 increases, leading to an increase in weight.

In this way, the rubber-equipped wheel 1 of this embodiment is used.
In 0, since the plate thickness was changed as needed, the weight can be reduced while securing the strength.

The first disk portion 23 has a refracting portion 23.
Since C is provided, the strength of the first disk portion 21 is improved.

Similarly, the refracting portion 21 is formed on the second disc portion 21.
Since C is provided, the strength of the second disk portion 21 is improved.

Usually, the adhesion of mud begins to adhere to the rubber portion and the step portion between the rubber portion and the disk portion, especially on the side of the machine body, and grows inward in the radial direction. At that time, not only does it go inward, but it also grows toward the outside of the fuselage, which accumulates and falls off due to its weight. The lumps of mud that have fallen off can cause crops to fall and weeds to grow. In addition, the surface shape of the mud that falls off is approximately constant depending on the field conditions.

In the wheel 10 with rubber of the present embodiment, the disk portion 20 is provided with the bending portion 23C and the bending portion 21C,
Since the disk portion 20 is gradually projected toward the anti-aircraft side as it goes inward in the radial direction, growth of the adhered mud in the thickness direction on the anti-aircraft side is hindered, and as a result, the mud adhesion amount decreases.

Further, in the rubber-equipped wheel 10 of this embodiment, the flat surface portion 21B is formed at the boundary portion 24 with the rubber portion 22.
a is arranged closer to the machine side than the outermost side in the width direction of the rubber part 22 on the side opposite the machine body, and the distance L from the outermost side in the width direction on the side of the opposite side of the rubber part 22 to the plane part 21Ba is in the range of 5 to 30 mm. It is set within. Therefore, the flat portion 21
Ba does not always come into contact with the soil, and the flat portion 21B
It is possible to prevent abrasion of the surface of a, suppress the amount of mud accumulated in the gap formed between the outermost part of the rubber portion 22 in the width direction on the side of the anti-body side and the flat portion 21Ba, and reduce damage caused by mud dropping. be able to.

That is, when the distance L is less than 5 mm, the anti-machine side of the flat portion 21Ba is always in contact with the soil during traveling in a field or the like. Wear on the machine side progresses, and as a result, painting is lost early and oxidation progresses, impairing durability.

When the distance L exceeds 30 mm, the outermost portion of the rubber portion 22 in the width direction on the non-machine side and the flat portion 21 are formed.
Since the gap portion formed with Ba becomes large, mud easily adheres, and the amount of mud accumulated becomes large.

The disk portion 20 has a disk shape,
Since the mud can be pressed and turned, it is difficult for the mud to rise.

In addition, inclined surfaces 22A are provided on both sides of the rubber portion 22.
Therefore, even when the rubber part 22 sinks and runs in the field, the mud flows down from the inclined surface 22A and is hard to collect in the boundary part 24.

In the wheel 10 with an elastic body of the present embodiment, since the first disk portion 23 and the second disk portion 21 of the disk portion 20 are each a press-formed product of a steel plate, they can be mass-produced inexpensively and accurately. is there.

In general, the shape of the hub 14 differs depending on the manufacturer of the agricultural machine, and the number and position of the bolt holes when mounting the hub 14 and the diameter of the bolt also differ.

Since the wheel 10 with the elastic body of this embodiment is constructed such that the first disk portion 23 attached to the hub 14 and the second disk portion 21 to which the rubber portion 22 is attached are assembled, the hub of the machine body 12 to be attached. It suffices to prepare a plurality of types of only the first disk portion 23 matching the shape of 14.
It is not necessary to prepare a plurality of types of wheels with elastic bodies according to the type of the hub 14.

The second disk portion 21 and the rubber portion 22 can be produced by the same production method (vulcanization molding) as the conventional one, and can be produced with the same specifications regardless of the shape of the hub 14. Therefore, only one type of vulcanization mold is required.

In this embodiment, the bolt 26 and the nut 28 are
Since the second disk portion 21 and the first disk portion 23 are assembled in the axial direction by using, it is easy to assemble and disassemble.

In the wheel 10 with an elastic body of this embodiment, the lug pattern of the tread surface of the rubber portion 22 is point-symmetric with respect to the center point P (see FIG. 3) of the distance between the left and right lugs on the equatorial plane CL. Also, the cross-sectional shape of the lug 34 in the tire circumferential direction is symmetrical in the rotational direction with respect to the center line 34C, as shown in FIG.

For this reason, since the left and right wheels can be shared by turning them over, there is no need to separately prepare the left and right wheels, which reduces the capital investment and the storage space for the wheels, and also reduces the running of paddy fields. It eliminates the risk of installing the wrong side for a car.

In the wheel 10 with the elastic body of the present embodiment, since the equatorial side end portion 34A of the lug 34 is connected to the rib 36 extending in the tire circumferential direction, side slip resistance during steering and wobble due to undulation of the road surface are prevented. This can be prevented, and particularly good straightness can be obtained at the front wheels. [Second Embodiment] Next, a second embodiment of the wheel with an elastic body of the present invention will be described with reference to FIG. The same components as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted.

As shown in FIG. 5, the second disc portion 21 of the wheel 10 with elastic body of the present embodiment is different in shape from the second disc portion 21 of the first embodiment.

In the present embodiment, the second disc portion 21 is
The step amount of the refraction portion 21D is smaller than that in the first embodiment.

The inner side in the radial direction of the refracting portion 21C is an inclined surface 21 which inclines toward the opposite body as it goes inward in the radial direction.
D is provided.

On the inner side of the inclined surface 21D in the radial direction, the plane portion 2 is located closer to the machine body than the outermost portion of the inclined surface 21D in the machine body width direction.
1E is formed. The flat portion 21E and the inclined surface 2
1D is connected via a bent portion 21F, and a bent portion 21G is further formed inside the plane portion 21E in the radial direction.

The second disc portion 21 of this embodiment is the first
Since the number of bent portions is larger than that of the second disc portion 21 of the first embodiment, the strength of the second disc portion 21 of the present embodiment is higher than that of the second disc portion 21 of the first embodiment. .

The other operations and effects are similar to those of the first embodiment. [Third Embodiment] Next, a third embodiment of the wheel with an elastic body of the present invention will be described with reference to FIG. The same components as those of the above-described embodiment are designated by the same reference numerals and the description thereof will be omitted.

As shown in FIG. 6, the second disk portion 21 of the wheel 10 with the elastic body of the present embodiment is the second disk portion 21 of the second embodiment further including a bent portion 21H. Is.

Further, the first disc portion 23 of the wheel 10 with an elastic body of the present embodiment is entirely formed of a steel plate having a thickness of 4.5 mm, and has a thickness of 4. 5
A reinforcing plate 42 formed by annularly press-molding a steel plate of mm is welded.

In the present embodiment, the entire first disk portion 23 is formed of a steel plate having a thickness of 4.5 mm, but the required torque is applied at a required thickness of 9 mm, so that the strength is increased. Weight reduction is achieved with almost no reduction. [Test Example] In order to confirm the effect of the present invention, one kind of a wheel with a rubber as a conventional example having one disk 100 made of steel plate as shown in FIG. 7 and an example to which the present invention is applied Three types of wheels with rubber were prepared, and the durability of the rim, the deformation of the disc during turning, and the adhesion of mud under rubber were compared.

The durability of the rim was as follows: each tire was pressed against a drum having a diameter of 1.7 m with a load of 700 kg, and the speed was 15 km /
Rolled at h, run 1000 km and judged with or without failure. No failure is OK. 700kg is equivalent to 1.5 times the load of the actual vehicle, and the traveling distance is 1000km.
Is equivalent to the mileage of the actual vehicle for 10 years.

Adhesion of mud under rubber is 50 months 2 months after rice planting.
The test was carried out by mounting a test tire on a soil field having a size of 30 m and a width of 30 m and a little clay content as an actual vehicle field, and using a passenger management machine loaded with 300 liters of solvent as a test vehicle.

Regarding the adhesion of mud, the adhesion status of the mud from the tire side portion to the inner diameter portion was visually observed during running, and small was regarded as good and large.
Shown in medium and small.

Regarding the deformation of the disk during turning, the degree of bending of the side surface of the disk when the direction was changed at the end in the field was observed, and what was invisible to the naked eye was considered OK.

[0095]

[Table 1] As shown in Table 1, it is understood that the rubber-equipped wheel of the example to which the present invention is applied is lighter and has higher strength than the rubber-equipped wheel of the conventional example.

[0096]

Since the rubber wheel according to claim 1 has the above-mentioned structure, it has an excellent effect of preventing lifting and carrying of mud, being lightweight, having high strength, and being provided at low cost. Have.

Since the rubber wheel according to the second aspect has the above-mentioned structure, it has an excellent effect that the strength of the second disk portion can be secured and the amount of the member used can be suppressed.

Since the wheel with rubber according to the third aspect has the above-mentioned structure, it has an excellent effect that the strength of the first disk portion can be improved.

Since the rubber wheel according to the fourth aspect has the above-mentioned structure, it has an excellent effect that the strength of the second disk portion can be improved.

Further, since the rubber wheel according to the fifth aspect has the above structure, it has an excellent effect that the strength in the vicinity of the connecting means can be improved.

[Brief description of drawings]

FIG. 1 is a cross-sectional view taken along a rotation axis of a rubber wheel according to a first embodiment of the present invention.

FIG. 2 is a side view of the wheel with rubber according to the first embodiment of the present invention.

FIG. 3 is a development view of a rubber portion showing a tread pattern of a wheel with rubber according to the first embodiment of the present invention.

FIG. 4 is a sectional view taken along an equatorial plane of a lug portion.

FIG. 5 is a cross-sectional view of a wheel with rubber according to a second embodiment of the present invention taken along a rotation axis.

FIG. 6 is a cross-sectional view taken along a rotation axis of a wheel with rubber according to a third embodiment of the present invention.

FIG. 7 is a cross-sectional view taken along a rotation axis of a wheel with rubber according to a conventional example.

[Explanation of symbols]

10 rubber wheels 21 Disk part 21C Refraction part 21F Refraction part 21G Refraction part 21H Refraction part 22 Rubber part 23 First Disk Section 23C Refraction part 26 bolts (connecting means) 28 Nut (connecting means)

Claims (5)

[Claims] 1. A first disc portion on the inner side in the radial direction that is mounted on a body, and a first disc portion provided on the outer side in the radial direction of the first disc portion.
An annular second disk portion that overlaps in the axial direction with a part of the outer peripheral side of the disk portion overlapping in the radial direction; an annular rubber portion integrally molded on the outer peripheral side of the second disk portion; A rubber-equipped wheel, comprising: a connecting means for connecting the first disc portion and the second disc portion at an overlapping portion, wherein the first disc portion is thicker than the second disc portion. Wheels with rubber characterized by being. 2. The outer diameter of the second disk portion is set within a range of 80 to 95% of the wheel outer diameter, and the dimension of the overlapping portion in the wheel radial direction is 20 to 70.
The wheel with rubber according to claim 1, wherein the wheel is set within a range of mm. 3. The first disk portion is provided with one or more refraction portions that are bent outward in the radial direction with respect to the mounting portion to the machine body and whose shape when viewed in a cross section along the rotation axis is refracted. The wheel with rubber according to claim 1 or 2, characterized in that. 4. The second disk portion is formed with one or more bending portions radially inside the rubber portion, the bending portion having a bent shape when viewed in a cross section taken along a rotation axis. The rubber-equipped wheel according to any one of claims 1 to 3, wherein: 5. The wheel with rubber according to claim 4, wherein the bent portion is formed in the second disk portion in the vicinity of the connecting means.