JP2005022442A - Wheel for agricultural use - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wheel for agricultural use improved in the overall strength of the wheel at a low cost without an increase in weight. <P>SOLUTION: The wheel is composed of a disc-like wheel member 11, and an annular elastic wheel 12 formed of an elastic material. It is provided with radial ribs 14 disposed in a radial pattern from the center of the wheel member 11 and extending in the peripheral direction of the wheel member 11, an axle mounting part 13 positioned in the center of the wheel member 11 and mounted in the axle of a machine body, and a rising wall 16 extending from the axle mounting part 13 in a direction opposite to a machine body. In end edges of the radial ribs 14, radial rib bending parts 17 bent along the rising wall 16 are formed. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an agricultural wheel used in an agricultural machine such as a rice transplanter or a tractor, and more particularly to a wheel structure using an elastic material such as rubber.
[0002]
[Prior art]
Conventionally, as a wheel of an agricultural machine such as a rice transplanter or a tractor, a disk-type agricultural wheel having a disk-shaped wheel portion is used.
[0003]
FIG. 10 is a plan view of a conventional agricultural wheel and a cross-sectional view taken along line XX.
[0004]
As shown in FIG. 10, a conventional agricultural wheel 100 is configured by integrally molding a disc-shaped wheel member 101 and an elastic ring portion 102 that covers an outer peripheral portion of the wheel member 101 with an elastic material such as rubber. Is done.
[0005]
The wheel member 101 includes an axle attachment portion 103 for attaching the agricultural wheel 100 to an axle of a body such as a rice transplanter at the center of the disc, and an elastic wheel attachment for bending an outer periphery of the disc and attaching an elastic wheel. Forming part.
[0006]
As shown in the cross-sectional view of FIG. 10, the wheel member 101 includes a first corner 105 that curves from the outer peripheral end of the axle mounting portion 103 to the opposite side of the fuselage, and a rising wall portion 104 that extends to the opposite side of the fuselage. Further, the second wall 106 that curves from the outer peripheral end of the rising wall portion 104 toward the elastic wheel mounting portion extends from the axle mounting portion 103 to the vicinity of the elastic wheel mounting portion on the opposite side of the airframe.
[0007]
The elastic ring portion 102 is formed by vulcanizing and bonding an elastic material such as rubber so as to cover the elastic ring mounting portion formed on the outer periphery of the wheel member 101.
[0008]
Here, the cross section in the vicinity of the axle mounting portion 103 is enlarged and shown in FIG.
FIG. 11 is an enlarged cross-sectional perspective view showing the vicinity of the axle mounting portion 103 of the conventional agricultural wheel 100.
[0009]
As shown in FIG. 11, the axle mounting portion 103 includes a boss 108 into which the axle of the fuselage is fitted, and a flat portion 107 on the outer periphery of the boss 108. The flat portion 107 is provided with a bolt hole 109 through which a bolt for fixing the agricultural wheel 100 to the hub of the machine body is passed.
[0010]
Then, from the outer peripheral end portion of the flat portion 107 of the axle mounting portion 103, the first corner 105 is bent in the direction opposite to the airframe, and through the rising wall portion 104, the second corner 106 is bent in the direction of the elastic wheel mounting portion. By doing so, the wheel member 101 protrudes to the opposite side of the machine body.
[0011]
Thus, by setting the wheel member 101 of the agricultural wheel 100 to project to the opposite side of the machine body, it is possible to improve the strength of the disk or prevent mud from adhering during traveling.
[0012]
An agricultural wheel having a configuration in which such a wheel member 101 projects to the opposite side of the machine body is disclosed in Patent Document 1, for example.
[0013]
[Patent Document 1]
Japanese Patent Laying-Open No. 2001-30701 (FIG. 6)
[0014]
[Problems to be solved by the invention]
However, the configuration of the conventional agricultural wheel 100 leaves a problem on the strength surface in the vicinity of the axle mounting portion 103.
[0015]
That is, when a load in the horizontal direction (arrow G shown in FIG. 10) is applied to the conventional agricultural wheel 100 from the opposite side of the machine body, stress is concentrated most at the first corner 105 and the second corner 106 of the wheel member 101. The curvature of the first corner 105 or the second corner 106 may change, and the agricultural wheel 100 may be deformed.
[0016]
Further, in order to increase the strength of the entire agricultural wheel 100, if reinforcing ribs are arranged on the projecting portion of the wheel member 101 on the opposite side of the machine body, the portion is concentrated on the first corner 105 and the second corner 106. Since the stress becomes great, the first corner 105 and the second corner 106 are obstacles to improving the overall strength of the agricultural wheel 100.
[0017]
On the other hand, by increasing the plate thickness of the wheel member 101 or changing the material of the wheel member 101 to one having high rigidity, it is possible to improve the strength of the entire agricultural wheel 100, The manufacturing cost and the overall weight of the agricultural wheel 100 increase, and it is not possible to realize a reduction in cost and weight.
[0018]
Then, this invention is made | formed in view of this problem, and it aims at providing the agricultural wheel which improved the intensity | strength of the whole wheel at low cost and without increasing a weight.
[0019]
[Means for Solving the Problems]
In order to achieve the above object, an agricultural wheel according to the present invention is an agricultural wheel composed of a wheel portion made of a disk member and an annular elastic ring body formed of an elastic material, and the wheel portion is A radial rib arranged radially from the center of the wheel portion and extending in the outer circumferential direction of the wheel portion; an axle mounting portion located at the center of the wheel portion and attached to the axle of the fuselage; and from the axle mounting portion to the fuselage. A rising portion extending in the opposite direction, and the radial rib is bent along the rising portion. This reinforces the curved portion (that is, the second corner) toward the elastic wheel mounting portion side of the axle mounting portion where the stress of the horizontal load is concentrated, so that it is effective without causing an increase in cost and weight. The strength of the entire agricultural wheel can be improved.
[0020]
Here, the wheel portion further includes a second rib arranged between the adjacent radial ribs in the rising portion, and the second rib may be bent along the rising portion. Good. This further increases the strength of the curved portion of the axle mounting portion toward the elastic wheel mounting portion, so that an agricultural wheel having excellent strength can be realized.
[0021]
Further, the axle mounting portion includes a plane portion that intersects perpendicularly with an axial direction of the axle of the airframe, the radial rib has an end located at the plane portion, and the second rib has an end at the plane. It is preferable to be located in the part. This also reinforces the curved portion (that is, the first corner) to the rising portion of the axle mounting portion where the stress of the horizontal load is concentrated, so that the entire wheel can be manufactured at low cost and without increasing the weight. The strength can be improved, and an agricultural wheel excellent in strength can be realized.
[0022]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, agricultural wheels according to embodiments of the present invention will be described with reference to the drawings.
(Embodiment 1)
First, the agricultural wheel which concerns on Embodiment 1 of this invention is demonstrated.
[0023]
FIG. 1 is a plan view of an agricultural wheel according to the first embodiment and a cross-sectional view taken along line AA.
[0024]
The agricultural wheel 10 is a wheel that is attached to an axle of an agricultural machine such as a rice transplanter or a tractor, and is in contact with a farming paddy of a rice field or a field. And an elastic ring portion 12.
[0025]
The wheel member 11 is a disk made of metal such as iron that constitutes the wheel of the agricultural wheel 10, and the axle mounting portion 13 for attaching the agricultural wheel 10 to the axle of the agricultural machine in the center, and the radial from the axle mounting portion 13. 1, an annular annular rib 15 straddling the radial rib 14, and an elastic wheel mounting portion formed by bending the outer periphery. As shown in the sectional view of FIG. 1, the axle mounting portion By curving from the outer peripheral end of 13 to the opposite side of the fuselage and from the outer peripheral end of the rising wall portion 16 extending in the direction opposite to the fuselage toward the elastic wheel attaching portion, from the axle attaching portion 13 to the vicinity of the elastic wheel attaching portion. It is configured to project to the opposite side of the aircraft.
[0026]
The axle mounting portion 13 is a central portion of the wheel member 11 that includes a boss that is fitted to the axle of an agricultural machine body and includes a flat portion 18 on the outer periphery of the boss.
[0027]
The flat portion 18 intersects perpendicularly with the axial direction of the axle of the aircraft, that is, a plane parallel to the hub of the aircraft, and is provided with a bolt hole through which a bolt for fixing the agricultural wheel 10 to the hub of the aircraft is passed. . And the wheel member 11 is curving from the outer peripheral end of this flat part 18 to the other side of the body.
[0028]
The rising wall portion 16 is a rising portion of the wheel member 11 extending from the outer peripheral end of the flat portion 18 in the direction opposite to the airframe. The wheel member 11 is curved again from the outer peripheral end of the rising wall portion 16 toward the elastic wheel mounting portion. In this way, the wheel member 11 is configured to project in the direction opposite to the airframe.
[0029]
The radial ribs 14 are ribs for reinforcing the projecting portion of the wheel member 11 to the opposite side of the machine body. The radial ribs 14 are arranged radially from the axle mounting portion 13 toward the outer periphery of the agricultural wheel 10 and are recessed toward the machine body side. It is formed by bending 11.
[0030]
The annular rib 15 is a rib for further strengthening the reinforcement by the radial rib 14, is formed in an annular shape straddling the radial rib 14, and the wheel member 11 is recessed so as to be recessed toward the airframe side like the radial rib 14. It is formed by bending.
[0031]
The radial ribs 14 and the annular ribs 15 give predetermined rigidity and strength to the wheel member 11 of the agricultural wheel 10.
[0032]
In the agricultural wheel 10 according to the first embodiment, the radial rib bending portion 17 is formed at the terminal portion of the radial rib 14 on the axle mounting portion 13 side, thereby further improving the rigidity and strength of the entire agricultural wheel 10. It has been.
[0033]
Here, in order to explain the radial rib bent portion 17 formed at the end portion of the radial rib 14 on the axle mounting portion 13 side, a sectional view in the vicinity of the axle mounting portion 13 is enlarged and shown in FIG.
[0034]
FIG. 2 is an enlarged cross-sectional perspective view showing the vicinity of the axle attachment portion 13 of the agricultural wheel 10 according to the first embodiment.
[0035]
As shown in FIG. 2, a radial rib bending portion 17 that bends on the rising wall portion 16 is formed at a terminal portion of the radial rib 14 on the axle mounting portion 13 side.
[0036]
The radial rib bent portion 17 is a portion that is bent along the rising wall portion 16 and constitutes a terminal end of the radial rib 14 on the axle mounting portion 13 side, and is formed by bending the rising wall portion 16 of the wheel member 11. The rising wall portion 16 is reinforced.
[0037]
The radial rib bent portion 17 is configured to gradually end the dent on the rising wall portion 16 toward the flat portion 18 of the axle mounting portion 13.
[0038]
Thus, by improving the strength of the entire agricultural wheel 10 by forming the radial ribs 14 and the annular ribs 15, by extending the radial ribs 14 to the rising wall portion 16 and forming the radial rib bent portions 17, Since the rising wall portion 16 where the stress of the horizontal load is concentrated and the curved portion of the outer peripheral end of the rising wall portion 16 are reinforced, the agricultural wheel 10 according to the first embodiment changes the plate thickness and material of the wheel member 11. Thus, the strength of the entire wheel is effectively improved.
[0039]
(Embodiment 2)
Next, an agricultural wheel according to Embodiment 2 of the present invention will be described.
The agricultural wheel according to the second embodiment has substantially the same configuration as the agricultural wheel 10 according to the first embodiment, but is different from the agricultural wheel 10 in the structure near the axle mounting portion of the agricultural wheel. Hereinafter, this difference will be mainly described with reference to the drawings.
[0040]
FIG. 3 is a plan view and a cross-sectional view taken along line BB of the agricultural wheel according to the second embodiment.
[0041]
As with the agricultural wheel 10 according to the first embodiment, the agricultural wheel 20 includes a wheel member 21 including an axle mounting portion 23, a radial rib 24, an annular rib 25, and an elastic wheel mounting portion, and rubber. It is comprised from the elastic ring part 22 which consists of elastic materials, such as.
[0042]
And as shown in FIG. 3, the radial rib bending part 27 formed in the terminal part by the side of the axle attachment part 23 of the radial rib 24 differs from the radial rib bending part 17 of the agricultural wheel 10 which concerns on the said Embodiment 1. As shown in FIG. The axle mounting portion 23 extends to the flat portion 28.
[0043]
FIG. 4 is an enlarged cross-sectional view of the vicinity of the axle attachment portion 23 in order to explain the radial rib bent portion 27 formed at the terminal end portion of the radial rib 24 on the axle attachment portion 23 side.
[0044]
FIG. 4 is an enlarged cross-sectional perspective view showing the vicinity of the axle attachment portion 23 of the agricultural wheel 20 according to the second embodiment.
[0045]
As shown in FIG. 4, a radial rib bent portion 27 is formed at the end portion of the radial rib 24 on the axle mounting portion 23 side.
[0046]
The radial rib bent portion 27 extends beyond the rising wall portion 26 to the flat portion 28 of the axle mounting portion 23 and gradually ends the dent toward the boss at the center of the axle mounting portion 23. .
[0047]
In this manner, the radial rib bent portion 27 at the end portion on the axle mounting portion 23 side of the radial rib 24 is formed so as to extend beyond the rising wall portion 26 to the flat portion 28 of the axle mounting portion 23, thereby generating a horizontal load. In addition to the rising wall portion 26 where the stress is concentrated and the curved portion at the outer peripheral end of the rising wall portion 26, the curved portion at the outer peripheral end of the flat portion 28 is reinforced, so the agricultural wheel 20 according to the second embodiment is Effective strength improvement over the entire wheel will be performed.
[0048]
(Embodiment 3)
Then, the agricultural wheel which concerns on Embodiment 3 of this invention is demonstrated.
The agricultural wheel according to the third embodiment has substantially the same configuration as the agricultural wheel 10 and the like according to the first and second embodiments, but is different from the agricultural wheel 10 and the like in the structure near the axle mounting portion of the agricultural wheel. . Hereinafter, this difference will be mainly described with reference to the drawings.
[0049]
FIG. 5 is a plan view of the agricultural wheel according to the third embodiment and a cross-sectional view taken along the line CC.
[0050]
The agricultural wheel 30 is a wheel member 31 including an axle mounting portion 33, a radial rib 34, an annular rib 35, and an elastic wheel mounting portion, like the agricultural wheel 10 according to the first and second embodiments. And an elastic ring portion 32 made of an elastic material such as rubber.
As shown in FIG. 5, radial rib bent portions 37 are formed at the end portions of the radial ribs 34 on the axle mounting portion 33 side, and the bent ribs 39 are formed between the adjacent radial rib bent portions 37. Is formed.
[0051]
Here, in order to explain the bent rib 39, an enlarged sectional view of the vicinity of the axle mounting portion 33 is shown in FIG.
[0052]
FIG. 6 is an enlarged cross-sectional perspective view showing the vicinity of the axle mounting portion 33 of the agricultural wheel 30 according to the third embodiment.
As shown in FIG. 6, a radial rib bent portion 37 is formed at the end portion of the radial rib 34 on the axle mounting portion 33 side, and between the adjacent radial rib bent portions 37 on the rising wall portion 36. A bending rib 39 that bends is formed.
[0053]
The bent rib 39 is a rib formed by bending the rising wall portion 36 at the midpoint between the adjacent radial rib bending portions 37 among the rising wall portions 36 of the wheel member 31, and reinforces the rising wall portion 36.
[0054]
The end of the bent rib 39 on the axle mounting portion 33 side is configured so that the dent is gradually terminated toward the flat portion 38 of the axle mounting portion 33 on the rising wall portion 36, similarly to the radial rib bent portion 37. It has become. On the other hand, the end of the bent rib 39 on the elastic wheel mounting portion side is configured to gradually end the dent toward the elastic wheel mounting portion at a portion that curves from the outer peripheral end of the rising wall portion 36 toward the elastic wheel mounting portion. Yes.
[0055]
Thus, by forming the bent rib 39 between the adjacent radial rib bent portions 37, the rising wall portion 36 where the stress of the horizontal load is concentrated and the curved portion of the outer peripheral end of the rising wall portion 36 are reinforced. Thus, the overall strength of the agricultural wheel 30 according to the third embodiment is excellent.
[0056]
(Embodiment 4)
Furthermore, the agricultural wheel which concerns on Embodiment 4 of this invention is demonstrated.
The agricultural wheel according to the fourth embodiment has substantially the same configuration as the agricultural wheel 10 according to the first, second, and third embodiments, but the agricultural wheel 10 or the like in the structure near the axle mounting portion of the agricultural wheel. And different. Hereinafter, this difference will be mainly described with reference to the drawings.
[0057]
FIG. 7 is a plan view of the agricultural wheel according to the fourth embodiment and a cross-sectional view taken along the line DD.
[0058]
This agricultural wheel 40 is a wheel provided with an axle mounting portion 43, a radial rib 44, an annular rib 45, and an elastic wheel mounting portion, like the agricultural wheel 10 according to the first, second and third embodiments. It is comprised from the member 41 and the elastic ring part 42 which consists of elastic materials, such as rubber | gum.
[0059]
As shown in FIG. 7, the radial rib 44 formed at the end portion of the radial rib 44 on the axle mounting portion 43 side and the bent rib 49 formed between the adjacent radial rib bent portions 47 are: Unlike the third embodiment, it extends to the flat portion 48 of the axle mounting portion 43.
[0060]
Here, in order to explain the radial ribs 44 and the bent ribs 49, an enlarged sectional view of the vicinity of the axle mounting portion 43 is shown in FIG. 8.
FIG. 8 is an enlarged cross-sectional perspective view showing the vicinity of the axle mounting portion 43 of the agricultural wheel 40 according to the fourth embodiment.
[0061]
As shown in FIG. 8, the radial rib bent portion 47 and the bent rib 49 are extended to the flat portion 48 of the axle mounting portion 43 beyond the rising wall portion 46 and gradually recessed toward the boss at the center of the axle mounting portion 43. It is configured to end.
[0062]
In this way, by forming the radial rib bent portion 47 and the bent rib 49 so as to extend beyond the rising wall portion 46 to the flat portion 48 of the axle mounting portion 43, the rising wall portion where the stress of the horizontal load is concentrated. 46 and the curved portion at the outer peripheral end of the rising wall portion 46 are reinforced up to the curved portion at the outer peripheral end of the flat portion 48, so that the overall strength of the agricultural wheel 40 according to the fourth embodiment is even better. It becomes.
[0063]
(Embodiment 5)
Next, an agricultural wheel according to Embodiment 5 of the present invention will be described.
The agricultural wheel according to the fifth embodiment has substantially the same configuration as the agricultural wheel 10 according to the first to fourth embodiments, but is different from the agricultural wheel 10 or the like in the shape of the wheel member. Hereinafter, this difference will be mainly described with reference to the drawings.
[0064]
FIG. 9 is a cross-sectional view in which the agricultural wheel according to the fifth embodiment is cut into circles.
The agricultural wheel 50 includes an axle mounting portion 53, a radial rib 54, an annular rib 55, a wheel member 51 including an elastic wheel mounting portion, and an elastic wheel portion 52 made of an elastic material such as rubber. The Further, an arrow E in FIG. 9 indicates a direction opposite to the aircraft (reverse aircraft side), and an arrow F indicates the aircraft side direction.
[0065]
Here, the wheel member 51 is disposed on the side of the elastic ring portion 52 on the side opposite to the machine body in the boundary portion 59 with the elastic ring portion 52.
[0066]
The wheel member 51 bends from the vicinity of the boundary portion 59 toward the anti-airframe side, extends vertically without being inclined toward the wheel center portion, that is, the axle mounting portion 53, and bends again toward the airframe side. In addition, the axle mounting portion 53 is formed so as to substantially follow the center line in the width direction of the elastic wheel portion 52 (the one-dot chain line shown in FIG. 9).
[0067]
Similarly to the wheel member 51, the radial rib 54 extends vertically without being inclined toward the wheel center portion, and the end of the radial rib 54 on the axle mounting portion 53 side extends to the rising wall portion 56. Radial rib bent portions 57 are formed.
[0068]
Also in the agricultural wheel provided with the wheel member 51 having such a configuration, the radial rib 54 is extended to the rising wall portion 56 to form the radial rib bent portion 57, whereby the rising wall portion 56 where the stress of the horizontal load is concentrated. Further, since the curved portion at the outer peripheral end of the rising wall portion 56 is reinforced, the strength of the entire wheel can be effectively improved without changing the plate thickness or material of the wheel member 51.
[0069]
In addition, the strength of the entire wheel can be further improved by forming a bent rib between the adjacent radial rib bent portions 57 in the wheel member 51 having such a configuration.
[0070]
As mentioned above, although the agricultural wheel which concerns on this invention was demonstrated based on each embodiment, this invention is not limited to these embodiment.
[0071]
For example, in each said embodiment, although demonstrated using the agricultural wheel which integrally formed the wheel member and the elastic ring | wheel part, the division | segmentation which connects a wheel member and an elastic ring | wheel part with a volt | bolt and a nut separately. It can also be applied to types of agricultural wheels.
[0072]
In addition, in the figures used for the description in the above embodiments, five radial ribs are shown, but the number of radial ribs is not limited to this, and may be smaller than this number. Needless to say, the number may be larger.
[0073]
【The invention's effect】
As is clear from the above description, according to the agricultural wheel according to the present invention, the curved portion in the vicinity of the axle mounting portion where the stress of the horizontal load is concentrated is reinforced, so the thickness and material of the wheel member can be changed. Therefore, the strength of the entire wheel can be effectively improved.
[Brief description of the drawings]
FIG. 1 is a plan view of an agricultural wheel according to a first embodiment and a cross-sectional view taken along line AA.
FIG. 2 is a perspective view of the vicinity of an axle mounting portion of an agricultural wheel according to the first embodiment.
FIG. 3 is a plan view of an agricultural wheel according to a second embodiment and a cross-sectional view taken along the line BB.
FIG. 4 is a perspective view of the vicinity of an axle mounting portion of an agricultural wheel according to a second embodiment.
FIGS. 5A and 5B are a plan view and a cross-sectional view taken along the line CC of the agricultural wheel according to the third embodiment. FIGS.
FIG. 6 is a perspective view of the vicinity of an axle mounting portion of an agricultural wheel according to a third embodiment.
7 is a plan view of an agricultural wheel according to a fourth embodiment and a sectional view taken along line DD. FIG.
FIG. 8 is a perspective view of the vicinity of an axle mounting portion of an agricultural wheel according to a fourth embodiment.
FIG. 9 is a cross-sectional view of an agricultural wheel according to a fifth embodiment.
FIG. 10 is a plan view of a conventional agricultural wheel and a cross-sectional view taken along line XX.
FIG. 11 is a perspective view of the vicinity of an axle mounting portion of a conventional agricultural wheel.
[Explanation of symbols]
10, 20, 30, 40, 50, 100 Agricultural wheels 11, 21, 31, 41, 51, 101 Wheel members 12, 22, 32, 42, 52, 102 Elastic wheel portions 13, 23, 33, 43, 53, 103 Axle mounting part 14, 24, 34, 44, 54 Radial rib 15, 25, 35, 45 Annular rib 16, 26, 36, 46, 56, 104 Rising wall part 17, 27, 37, 47, 57 Radial rib bending Portions 18, 28, 38, 48, 107 Flat portions 39, 49 Bending rib 59 Boundary portion 105 First corner 106 Second corner 108 Boss 109 Bolt hole

Claims (4)

An agricultural wheel composed of a wheel part made of a disk member and an annular elastic ring formed of an elastic material,
The wheel part is
Radial ribs arranged radially from the center of the wheel portion and extending in the outer circumferential direction of the wheel portion;
An axle mounting portion located at the center of the wheel portion and attached to the axle of the fuselage;
A rising portion extending in a direction opposite to the airframe from the axle mounting portion,
The agricultural wheel, wherein the radial rib is bent along the rising portion. The wheel portion further includes
The rising portion includes a second rib arranged between the adjacent radial ribs,
The agricultural wheel according to claim 1, wherein the second rib is bent along the rising portion. The axle mounting portion includes a plane portion that intersects perpendicularly with the axial direction of the axle of the fuselage,
The agricultural wheel according to claim 1 or 2, wherein the end of the radial rib is located in the plane portion. The agricultural wheel according to claim 3, wherein a terminal end of the second rib is located in the flat portion.

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