JP4601333B2 - Agricultural wheels - Google Patents

Description

  The present invention relates to agricultural wheels.

As an agricultural wheel to be mounted on an agricultural machine such as a rice transplanter, a wheel part for mounting on a body axle, and an elastic ring provided in an annular shape (ring shape) surrounding the outer side in the radial direction of the wheel part What it has is known (for example, refer patent document 1 etc.).
The elastic ring body is formed by providing a tire portion made of an elastic material along the outer peripheral portion based on a ring core portion formed in accordance with an annular shape of the elastic ring body. An inner peripheral flange portion projecting toward is provided. On the other hand, there are various types of foil parts, such as a disk type and a spoke type, which have a circular shape or a triangular shape, etc., all of which have an outer peripheral flange that overlaps with the inner peripheral flange portion of the elastic ring. Is provided.

  Accordingly, the inner peripheral flange portion of the elastic ring body and the outer peripheral flange portion of the foil portion are overlapped, a bolt is pierced into the overlapping portion, and a nut is screwed into the protruding end of the bolt, whereby the foil portion and the elastic ring body are Are combined. Since the inner and outer flanges are usually flat and parallel to the plane perpendicular to the axial direction of the fuselage axle (the surface along the radial direction), go to the overlapping part of both flanges. The pierced bolt is parallel to the axial direction of the body axle.

Therefore, the ground load generated when the agricultural wheel is mounted on the body axle acts as a shearing force perpendicular to the bolt in the axial direction (same as the axial direction of the body axle). Therefore, when there is a specification change that increases the total vehicle weight on the airframe side and the ground load increases, it is necessary to change the bolt to a thicker one.
JP 2001-30701 A

  If a thick bolt is used to pierce the overlapping portion of the inner peripheral flange portion of the elastic ring body and the outer peripheral flange portion of the foil portion (a bolt used for coupling the foil portion and the elastic ring body), The nuts screwed to the bolts also have larger outer diameters and heights (thicknesses), so that the projecting amounts of the bolt heads and nuts with respect to the inner peripheral flange part and outer peripheral flange part also increase.

For this reason, mud soil easily adheres to the bolt heads and nuts, and mud falls during wheel rotation easily occur. Inside, it caused various problems such as road pollution.
In addition, the screw interface between the bolt and the nut and the bolt end (male thread portion) protruding from the nut are rusted and the screw and the nut cannot be loosened easily.

  The present invention has been made in view of the above circumstances, and prevents an increase in mud adhesion due to the fastening means (bolts, nuts, etc.) used for coupling the foil portion and the elastic ring body. An object of the present invention is to provide an agricultural wheel that can suppress various problems caused by mud adhesion.

In order to achieve the above object, the present invention has taken the following measures.
That is, the agricultural wheel according to the present invention has a wheel portion attached and fixed to the body axle , and an elastic ring body that is provided in an annular shape so as to surround the outer side in the radial direction of the wheel portion, foil portion is by press-forming a plate material, the outer peripheral portion of the wheel portion and the outer peripheral flange portion is provided, the resilient ring member is a ring body core portion formed accordingly of the ring-shaped A tire portion made of an elastic material is provided along the outer peripheral portion of the base, and an inner peripheral flange portion is provided on the inner peripheral side of the ring body core portion .

By overlapping each other on the outer peripheral flange portion and the inner peripheral flange portion, the axial joint interface along the axial direction of the airframe axle and the axial direction of the axial joint interface from one end or the other end in the radial direction. Folded portions formed by bending the outer peripheral flange portion and the inner peripheral flange portion are provided so as to come into contact with the radially bonded interface extending in the direction along the direction, and overlapped at the radial bonded interface of these bent portions you are fastened by fastening means the portion to be.

With such a configuration, since a part of the ground load is shared by the axial joining interface of the bent portion , the ground load borne by the fastening means is reduced accordingly.
Therefore, even when there is a specification change that increases the total vehicle weight on the airframe side and the ground load increases, it is not necessary to take measures such as changing the bolt to a thicker one at a time. From this, it is possible to prevent an increase in mud adhesion due to the fastening means, and thus it is possible to suppress various problems caused by the mud adhesion.

The bent portion of the outer peripheral flange portion and the bent portion of the inner peripheral flange portion are formed by bending the outer peripheral flange portion and the inner peripheral flange portion into a bowl shape, and are faced at the axial direction joining interface and the radial direction joining interface. contact and, it is preferable radial junction interface that is formed so as to be located radially inward than the axial junction interface.
At least one of the inner peripheral flange portion of the outer peripheral flange portion or the elastic ring member of the wheel unit, positional deviation in the axial direction of the fuselage axle radial bonded interface of the bent portion with respect to the width direction center of the elastic ring member If the waist folding part to be provided is provided, a part of the ground load can be expected even in this waist folding part, which is a suitable measure.

The bent part of the outer peripheral flange part and the bent part of the inner peripheral flange part are in contact with each other even at the radial joint interface extending in the radial direction from one end or the other end of the vehicle body axle in the axial direction. It is good to be bent.
A wheel portion that is fixedly mounted on the body axle, and an elastic ring body that is provided in an annular shape so as to surround a radially outer side of the wheel portion;
The foil part is formed by press-molding a plate material, and an outer peripheral flange part is provided on the outer peripheral part of the foil part,
The elastic ring body is formed by providing a tire part made of an elastic material along the outer peripheral part based on a ring body core part formed in accordance with an annular shape of the elastic ring body, on the inner peripheral side of the ring core part. An inner flange is provided,
The outer peripheral flange portion and the inner peripheral flange portion are provided with bent portions that are overlapped with each other,
The bent portion of the outer peripheral flange portion and the bent portion of the inner peripheral flange portion are a first bent portion that is first bent so as to contact at an axial joining interface along the axial direction of the body axle , And a second bent portion that is further bent radially inward or radially outward after the first bent portion, and the second bent portions of the bent portions are connected by fastening means. It can also be concluded .

The angle formed by the axial joint interface with respect to the axial direction of the vehicle axle is preferably 0 ° to 60 °. If it exceeds 60 °, it will not be possible to fully expect the sharing of the ground load.
It is preferable that the bent portion is formed in the vicinity of the tire portion (in short, a position as close as possible to the outer side in the radial direction as an agricultural wheel).
The fastening means may have a bolt and a nut screwed to the bolt, and in this case, the nut is preferably a cap nut. By doing so, the screw interface between the bolt and nut and the bolt end (male thread part) protruding from the nut can be prevented from rusting, and the problem that the screw and bolt cannot be loosened can be prevented. it can.

  The agricultural wheel according to the present invention can prevent an increase in mud adhesion due to fastening means (bolts, nuts, etc.) used for coupling the foil part and the elastic ring body. The problem can be suppressed.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 and 2 show a first embodiment of an agricultural wheel 1 according to the present invention. The agricultural wheel 1 according to the first embodiment has a foil portion 2 and an elastic ring body 3 provided around the wheel portion 2.
The wheel part 2 is a part for mounting the agricultural wheel 1 to the machine axle 4 of an agricultural machine such as a rice transplanter, and a connecting bolt 5 for connection to the machine axle 4 can be inserted into the central part thereof. The part which was made is provided. In the first embodiment, the foil portion 2 is a disk-shaped disc, and is formed by press-molding a plate material. Accordingly, the outer peripheral portion of the wheel portion 2 has a concentric circular shape centering on the axis of the body axle 4, and the outer peripheral flange portion 7 is formed at the outer peripheral portion.

  The elastic ring body 3 surrounds the outer flange portion 7 of the foil portion 2 and is formed in an annular shape (ring shape). This elastic ring body 3 is based on a metal ring body core portion 10 formed in accordance with its annular shape, and a tire portion 11 is provided along the outer periphery of the ring body core portion 10. is there. The tire portion 11 is formed of an elastic material such as rubber, and is attached to the annular core portion 10 in a solid state by baking, for example.

  The ring body core portion 10 has an embedded portion 10a hidden in the tire portion 11 and an exposed portion 10b projecting inward in the radial direction of the tire portion 11, and an area closer to the inner periphery in the exposed portion 10b. The inner flange portion 13 is formed by overlapping the outer flange portion 7 of the foil portion 2 to form the overlapping portion 12. The embedded portion 10a in the figure is formed by bending the forming material of the ring body core portion 10 into a cross-section “T” shape. For example, the embedded portion 10a corresponds to the tire portion 11 using a round pipe or a square pipe. It may be formed into a ring shape and welded to the exposed portion 10b.

The overlapping portion 12 formed by overlapping the outer peripheral flange portion 7 of the foil portion 2 and the inner peripheral flange portion 13 of the elastic ring body 3 allows the fastening means 15 to pass through when the elastic ring body 3 and the foil portion 2 are coupled. It is a part for fastening.
The outer peripheral flange portion 7 of the wheel portion 2 is provided with a bent portion 16 that is bent in a bowl shape in a region where the overlapping portion 12 is formed with the inner peripheral flange portion 13 of the elastic ring body 3. On the other hand, the inner peripheral flange portion 13 of the elastic ring body 3 also has a bent portion 17 bent in a bowl shape in a region where the overlapping portion 12 is formed with the outer peripheral flange portion 7 of the foil portion 2. Is provided.

The bent portion 16 provided on the outer peripheral flange portion 7 and the bent portion 17 provided on the inner peripheral flange portion 13 are positioned to correspond to each other, and bend in opposite directions in the axial direction of the body axle 4. It has become a relationship.
Therefore, when the overlapping portion 12 is formed by superimposing the outer peripheral flange portion 7 and the inner peripheral flange portion 13, the meshing portion 18 by the bent portions 16 and 17 is formed in the overlapping portion 12. The meshing portion 18 includes an axial joining interface along the axial direction of the airframe axle 4 and a radial joining interface along the radial direction of the airframe axle 4.

In the first embodiment, when the axial joining interface is used as a boundary, the radial joining interface is positioned on the radially inner side, and the through portion of the fastening means 15 is located with respect to the radial joining interface. Is provided. That is, the fastening means 15 is positioned on the radially inner side of the axial joining interface and in the vicinity thereof.
The fastening means 15 is exemplified by a bolt fastening with a bolt 23 and a nut 24. Therefore, among the outer peripheral flange part 7 of the foil part 2 and the inner peripheral flange part 13 of the elastic ring body 3, the positioning positions where the insertion holes for the bolts 23 are aligned with each other at a plurality of positions in the circumferential direction within the region where the overlapping part 12 is formed. Provided.

  In the first embodiment, a waist folded part 20 is further provided with respect to the outer peripheral flange part 7 of the foil part 2 so that the inner peripheral flange part 13 of the elastic ring body 3 is accommodated inside the waist folded part 20. It has become. Therefore, in the overlapping portion 12 formed by superposing the outer peripheral flange portion 7 and the inner peripheral flange portion 13, the radial joint interface (R position in FIG. 2) included therein is the elastic ring body 3. The position shifts in the axial direction of the fuselage axle 4 with respect to the center in the width direction (P position in FIG. 2).

  The nut 24 of the fastening means 15 may be fixed to either the elastic ring body 3 side or the foil part 2 side by welding, or either the elastic ring body 3 side or the foil part 2 side. However, it may be omitted by providing a female screw hole directly. The fastening means 15 may be riveted by rivets, or may be welded in some cases.

In the illustrated example, an appropriate lug pattern is provided on the outer peripheral surface of the tire portion 11, and the inner peripheral surface side has a shape protruding in a mountain shape in cross section with the central portion in the width direction as the top portion. The detailed structure and shape of the tire portion 11 can be changed as appropriate.
In the agricultural wheel 1 of the present invention having such a configuration, the outer peripheral flange portion 7 of the foil portion 2 and the inner peripheral flange portion 13 of the elastic ring body 3 are overlapped to form a superposed portion 12. A meshing portion 18 including an axial joining interface and a radial joining interface is formed therein, and a portion corresponding to the radial joining interface of the meshing portion 18 is firmly secured by the fastening means 15. Fasten and assemble.

  When this agricultural wheel 1 is mounted on the body axle 4 of an agricultural machine, the ground load acting on this agricultural wheel 1 is a bolt of the fastening means 15 along the radial joint interface in the meshing portion 18 in the overlapping portion 12. 23, the shearing force is orthogonal to the axial direction of the shaft 23. However, since a part of the grounding load is shared at the axial joint interface included in the meshing portion 18, all the shearing force is concentrated on the bolt 23. That disappears. Therefore, breakage, breakage, and the like hardly occur in the fastening means 15.

  Moreover, since the waist folded portion 20 is provided on the outer peripheral flange portion 7 of the wheel portion 2, a part of the ground load is shared by the waist folded portion 20 and the shearing force itself acting on the bolt 23 is alleviated. It has become. When the foil portion 2 is formed of a plate material, the ground load can be absorbed as a slight deflection of the plate material. For this reason, stress distribution of the ground load (shearing force distribution on the bolt 23) can be expected.

  For these reasons, even if there is a specification change that changes the total vehicle weight on the machine body side of the agricultural machine, it is not necessary to take measures to replace the bolt 23 of the fastening means 15 with a thicker one. Therefore, in the bolt heads and nuts 24 of the bolts 23, it is possible to avoid the outer diameter and height (thickness) of the bolts 23 from becoming particularly large and to limit the amount of protrusion thereof. It is possible to prevent an increase in mud adhesion to the nut 24.

As a result, mud fall during wheel rotation can be suppressed, mud fogging, folding and falling of planted seedlings can be prevented while traveling on the field, and road contamination can be prevented while traveling on paved roads. Various problems caused by mud adhesion can be suppressed.
3 and 4 show a second embodiment of the agricultural wheel 1 according to the present invention. The most different point of the agricultural wheel 1 of the second embodiment from the first embodiment described above is that the overlapping portion 12 is formed in accordance with the fact that the foil portion 2 is formed into a three-dimensionally curved cross-sectional shape for increasing the strength. In the meshing portion 18 formed inside, the axially bonded interface is secured wide. As a result, there is an advantage that the contact area of the interface in the axial direction is expanded, and the share of the ground load is increased accordingly.

In addition, the bending part 16 provided in the outer peripheral flange part 7 of the foil part 2 and the bending part 17 provided in the inner peripheral flange part 13 of the elastic ring body 3 are respectively bending directions as in the case of the first embodiment. Is reversed.
Further, the engaging portion 18 is used to prevent the bolt head of the bolt 23 in the fastening means 15 from rotating. Other configurations and operational effects are substantially the same as those in the first embodiment.

  FIG. 5 shows a third embodiment of the agricultural wheel 1 according to the present invention. The most different point of the agricultural wheel 1 of the third embodiment from the first embodiment described above is that the meshing portion 18 in the overlapping portion 12 has a diameter radially outward when the axial joining interface is a boundary. The point is that the directional bonding interface is positioned. A penetrating portion of the fastening means 15 is provided for the radial joining interface. That is, the fastening means 15 is positioned on the outer side in the radial direction with respect to the axial joining interface and in the vicinity thereof.

In the fastening means 15, a cap nut is used as the nut 24. Therefore, it is possible to prevent the problem that the screwing interface between the bolt 23 and the nut 24 and the bolt end (male screw portion) protruding from the nut 24 rust and the screwing between the bolt and the nut cannot be loosened. Yes. Other configurations and operational effects are substantially the same as those in the first embodiment.
FIG. 6 shows a fourth embodiment of the agricultural wheel 1 according to the present invention. In the agricultural wheel 1 according to the fourth embodiment, a penetrating portion of the fastening means 15 is provided at the meshing portion 18 in the overlapping portion 12 with respect to the axial joining interface. In addition, if this axial direction joining interface is made into a boundary, the radial direction joining interface is located in the radial direction outer side.

  FIG. 7 shows a fifth embodiment of the agricultural wheel 1 according to the present invention. The agricultural wheel 1 of the fifth embodiment is a modification of the above-described second embodiment (FIG. 4), and in the meshing portion 18 in the overlapping portion 12, the axial joint interface is the body axle. 7 with respect to the axial direction of 4 in a predetermined angle range indicated by θ in FIG. The inclination angle θ is preferably 0 to 60 °.

In addition, reinforcing ribs 25 are provided at the axial joining interface. Because of the reinforcing ribs 25, the axial joining interface is not a surface contact but a line contact or a point contact. However, since the rib protrusion amount of the reinforcing rib 25 is small, there is no problem with this point. .
FIG. 8 shows a sixth embodiment of the agricultural wheel 1 according to the present invention. In the agricultural wheel 1 of the sixth embodiment, only the axial joining interface along the axial direction of the airframe axle 4 is provided in the overlapping portion 12 and does not include the radial joining interface. As a result, the abutting portion 30 is formed.

Fastening means 15 is provided so as to penetrate such an overlapped portion 12 in the direction along the radial direction of the body axle 4 at the axial joining interface.
FIG. 9 shows a seventh embodiment of the agricultural wheel 1 according to the present invention. The agricultural wheel 1 of the seventh embodiment is a modified example of the above-described sixth embodiment (FIG. 8), and the butted portion 30 in the overlapping portion 12 has the first bent portion 32 and the second folded portion. It has a curved portion 33.

The first bent portion 32 is positioned to be bent first from the outer peripheral flange portion 7 of the foil portion 2 and the inner peripheral flange portion 13 of the elastic ring body 3, and the second bent portion 33 is the first bent portion 33. It is positioned so as to be further bent radially inward or radially outward (radially inward in the illustrated example) following the bent portion 32. The fastening means 15 is provided so as to penetrate the second bent portion 33.
By the way, this invention is not limited to each above-mentioned embodiment, It can change suitably according to embodiment.

  For example, the wheel portion 2 may be a disc type such as a triangle or a quadrangle other than a circular disc type, or may be a spoke type. Moreover, in the elastic ring body 3, it is also possible to make the tire part 11 into a hollow structure and to make it a pneumatic tire.

It is the sectional side view which showed 1st Embodiment of the agricultural wheel which concerns on this invention. It is a principal part enlarged view of FIG. It is the sectional side view which showed 2nd Embodiment of the agricultural wheel which concerns on this invention. It is a principal part enlarged view of FIG. It is a principal part enlarged view (figure drawn with the same viewing angle as FIG. 3) which showed 3rd Embodiment of the agricultural wheel which concerns on this invention. It is a principal part enlarged view (figure drawn with the same viewing angle as FIG. 3) which showed 4th Embodiment of the agricultural wheel which concerns on this invention. It is a principal part enlarged view (figure drawn with the same viewing angle as FIG. 3) which showed 5th Embodiment of the agricultural wheel which concerns on this invention. It is a principal part enlarged view (figure drawn with the same viewing angle as FIG. 3) which showed 6th Embodiment of the agricultural wheel which concerns on this invention. It is a principal part enlarged view (figure drawn with the same viewing angle as FIG. 3) which showed 7th Embodiment of the agricultural wheel which concerns on this invention.

DESCRIPTION OF SYMBOLS 1 Agricultural wheel 2 Wheel part 3 Elastic ring body 4 Airframe axle 7 Outer peripheral flange part 10 Ring body core part 11 Tire part 12 Superposition part 13 Inner peripheral flange part 15 Fastening means 20 Waist folding part 30 Butt part 32 1st bending part 33 1st 2 folded parts

Claims (9)

A wheel part (2) attached and fixed to the body axle (4) , and an elastic ring body (3) provided in an annular shape surrounding the outer side in the radial direction of the wheel part (2);
Wheel unit (2) comprises by press-forming a plate material, the outer peripheral portion of the foil portion (2) has an outer peripheral flange portion (7) is provided,
The elastic ring body (3) includes a tire body part (11) made of an elastic material along the outer peripheral part based on a ring body core part (10) formed in accordance with the annular shape of the elastic ring body , An inner peripheral flange portion (13) is provided on the inner peripheral side of the ring body core portion (10) ,
The outer peripheral flange portion (7) and the inner peripheral flange portion (13) are overlapped with each other, so that an axial joint interface along the axial direction of the fuselage axle (4) and a fuselage axle of the axial joint interface ( 4) A fold formed by bending the outer peripheral flange portion (7) and the inner peripheral flange portion (13) so as to come into contact with the radial joining interface extending in the radial direction from one end or the other end in the axial direction. Agricultural wheels characterized in that bent portions (16, 17) are provided, and the overlapping portions of the bent portions (16, 17) at the radial joint interface are fastened by fastening means (15) . The bent portion (16) of the outer peripheral flange portion (7) and the bent portion (17) of the inner peripheral flange portion (13) are formed into a bowl shape with the outer peripheral flange portion (7) and the inner peripheral flange portion (13). It is formed by bending, and is in surface contact at the axial direction bonding interface and the radial direction bonding interface, and is formed so that the radial direction bonding interface is positioned radially inward from the axial direction bonding interface. The agricultural wheel according to claim 1, characterized in that: At least one of the outer peripheral flange portion (7) of the foil portion (2) or the inner peripheral flange portion (13) of the elastic ring body (3) is elastically elastic in the radial joint interface of the bent portions (16, 17). Agricultural wheel according to claim 1 or 2, characterized in that a waist fold (20) is provided that is displaced in the axial direction of the machine axle (4) with respect to the center in the width direction of the ring (3). . A wheel part (2) attached and fixed to the body axle (4) , and an elastic ring body (3) provided in an annular shape surrounding the outer side in the radial direction of the wheel part (2);
Wheel unit (2) comprises by press-forming a plate material, the outer peripheral portion of the foil portion (2) has an outer peripheral flange portion (7) is provided,
The elastic ring body (3) includes a tire body part (11) made of an elastic material along the outer peripheral part based on a ring body core part (10) formed in accordance with the annular shape of the elastic ring body , An inner peripheral flange portion (13) is provided on the inner peripheral side of the ring body core portion (10) ,
The outer peripheral flange portion (7) and the inner peripheral flange portion (13) are overlapped with each other , so that the outer peripheral flange portion is brought into surface contact at the axial joint interface along the axial direction of the body axle (4). (7) and the bent portions (16, 17) formed by bending the inner peripheral flange portion (13) are provided, and the portions overlapped at the axial joining interface of these bent portions (16, 17) are provided. Agricultural wheels characterized by being fastened by fastening means (15) . The bent portion (16) of the outer peripheral flange portion (7) and the bent portion (17) of the inner peripheral flange portion (13) are in the radial direction from one axial end or the other end of the airframe axle (4) at the axial joining interface. 5. The agricultural wheel according to claim 4, wherein the agricultural wheel is bent so as to be in contact with a radial joining interface extending in a direction along the axis . A wheel part (2) attached and fixed to the body axle (4), and an elastic ring body (3) provided in an annular shape surrounding the outer side in the radial direction of the wheel part (2);
The foil part (2) is formed by press-molding a plate material, and an outer peripheral flange part (7) is provided on the outer peripheral part of the foil part (2).
The elastic ring body (3) includes a tire body part (11) made of an elastic material along the outer peripheral part based on a ring body core part (10) formed in accordance with the annular shape of the elastic ring body, An inner peripheral flange portion (13) is provided on the inner peripheral side of the ring body core portion (10),
The outer peripheral flange portion (7) and the inner peripheral flange portion (13) are provided with bent portions (16, 17) that are overlapped with each other,
The bent portion (16) of the outer peripheral flange portion (7) and the bent portion (17) of the inner peripheral flange portion (13) are in contact with each other at the axial joint interface along the axial direction of the body axle (4). first the first bent portion which is bent (32), a second bent portion which is bent further radially inward or radially outward Following this first bent portion (32) to ( 33) has a, agricultural wheels you characterized in that it is fastened by the second bent portion of bent portion (16, 17) (33) fastening comrades means (15). Agricultural wheel according to claim 1, 4, 5 or 6 prior SL-axis joint interface and wherein the angle (theta) is forming with respect to the axial direction of the machine body axle (4) is 0 ° to 60 ° . The agricultural wheel according to any one of claims 1 to 7, wherein the bent portions (16, 17) are formed in the vicinity of the tire portion (11).   The fastening means (15) has a bolt (23) and a nut (24) screwed into the bolt (23), and the nut (24) is a cap nut. The agricultural wheel according to any one of claims 1 to 8.

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