JP5036237B2 - Agricultural wheels - Google Patents

Description

  The present invention relates to an agricultural wheel mounted on an axle of an agricultural machine.

Conventional agricultural wheels include, for example, an annular rim, an elastic wheel formed by covering the rim with an elastic material such as rubber, an axle attachment portion attached to an axle of an agricultural machine, and the rim. Some have metal spokes that connect axle mounting portions (hereinafter referred to as spoke types) (see, for example, Patent Document 1).
JP 2002-264602 A

In recent years, it has been demanded to improve the quality of products by improving the appearance of agricultural wheels. For this reason, it is required to apply a coating such as melamine baking to metal parts such as spokes of agricultural wheels.
However, since conventional spoke type agricultural wheels have a metal part such as a spoke and a rubber elastic ring formed integrally, the elastic ring must be precisely masked in order to paint the metal part. did not become. Also, it is difficult to make the coating interface uniform due to the coating color, and the cost is high.

  This invention is made | formed in view of such a situation, and it aims at providing the agricultural wheel which enabled the painting operation | work easily.

In order to solve the above problems, the present invention has taken the following technical means.
In other words, agricultural wheel according to the present invention includes a wheel main body having a resilient ring portion formed to cover the annular rim of an elastic material, and a disk attached to the axle, the front cut arm is a pipe is fixed to the ring member annular in via a plurality of spokes extending formed radially, the disc is via the front fastening means to cover the spokes when viewed from the rotation axis direction SL It is fixed to the ring body.

  According to this, the disk is separated from the wheel body, and only this disk is painted and fixed to the wheel body by the fastening means, thereby eliminating the need for masking the elastic wheel portion and simplifying the painting work. become able to. In addition, covering the spokes with a disc can save the labor of painting the spokes, and the agricultural wheels have a better appearance and increase their commercial value.

Preferably, the ring body is substantially the same as the rib in a cross section including a cylindrical rib extending in the direction of the rotation axis at a radially outer end and a rotation axis continuous with one end of the rib in the rotation axis direction. An annular attachment portion that forms a right angle and extends radially inward, and the spoke is fixed to the outer peripheral surface of the rib.
The agricultural wheel according to the present invention is characterized in that the fastening means comprises a bolt and a nut.

According to this, the disk can be detachably attached to the wheel body, and the disk can be easily replaced.
The agricultural wheel according to the present invention is characterized in that the fastening means comprises a rivet.
According to this, the disc can be securely and firmly fixed to the wheel body.
The agricultural wheel according to the present invention is characterized in that a boss portion attached to an axle is provided at the center of the disc, and a reinforcing plate is provided between the boss portion and the disc.

According to this, the strength of the boss portion and the disk can be increased.
In the agricultural wheel according to the present invention, mounting holes for attaching fastening means are formed in the ring body at a predetermined pitch in the circumferential direction of the ring body. When the inner diameter of the ring portion is a, b ≧ 0.6a.
According to this, the attachment hole is positioned as far as possible from the center of the disk and close to the elastic wheel portion, thereby increasing the strength of the agricultural wheel and reducing the weight of the ring body as much as possible.

Further, the rim and spoke are formed of a pipe.
According to this, the weight of the whole agricultural wheel can be reduced by reducing the weight of the rim and the spoke.

  According to the present invention, it is possible to simplify the painting operation of agricultural wheels.

The best mode for carrying out the present invention will be described below with reference to the drawings.
In the first embodiment of FIGS. 1 and 2, the agricultural wheel 1 has a wheel body 3 having an annular elastic wheel portion 2 and a disk 4 attached to the axle of an agricultural machine.
The elastic ring portion 2 has an annular rim 5. The rim 5 is made of a metal such as iron and is formed of a cylindrical pipe. The entire surface of the rim 5 is covered with an elastic material 6. The elastic material 6 is made of, for example, rubber and is vulcanized and bonded to the rim 5.

A plurality of lugs 7 are formed on the elastic ring portion 2. These lugs 7 include a center lug 7a and a side lug 7b. The center lug 7a is a central portion in the width direction of the elastic ring portion 2, and is formed along the circumferential direction. Each center lug 7a is formed at regular intervals in the circumferential direction of the elastic ring portion 2.
The side lugs 7b are provided so as to extend from the side portions of the center lugs 7a toward the outside in the width direction of the elastic ring portion 2. The side lugs 7b are arranged in a zigzag pattern on the left and right in the width direction of the elastic ring portion 2 with the center lug 7a as a boundary.

  A circular ring body 8 is fixed to the rim 5 via a plurality of spokes 9. As shown in FIGS. 1 and 2, a circular hole 8 a is formed in the ring body 8. The ring body 8 is formed by bending a metal circular ring with a bend type. Thereby, the middle part of the ring body 8 is bent in the plate thickness direction, and the ring body 8 is formed in an L shape in cross-section.

Thereby, the ring body 8 is formed with a rib 8b and an attachment portion 8c to which the disk 4 is attached. The rib 8 b of the ring body 8 is formed over the entire circumference of the ring body 8. The attachment portion 8c of the ring body 8 is formed substantially perpendicular to the rib 8b.
A plurality of spokes 9 are fixed to the outer peripheral surface of the rib 8 b of the ring body 8. The spoke 9 is made of a metal and a cylindrical pipe. In this embodiment, the number of spokes 9 is three. One end of the spoke 9 is fixed to the outer peripheral surface of the rib 8 b of the ring body 8 by welding or the like, and the other end is fixed to the rim 5.

The spoke 9 is covered with an elastic material 6 from one end portion to a midway portion thereof. Hereinafter, the portion of the elastic material 6 that covers the spoke 9 is referred to as a covering portion 11. The covering portion 11 is formed so as to protrude inward in the radial direction from the inner peripheral portion of the elastic ring portion 2. The coating | coated part 11 is comprised by the cylinder shape. The covering portion 11 is formed with a predetermined thickness.
The disk 4 is made of metal and has a circular shape. The disk 4 is formed by pressing a metal disk. Thereby, the disc 4 is formed with an annular convex portion 4a in a side view.

  The disk 4 is fixed to the ring body 8 through fastening means 12. The fastening means 12 includes a bolt and a nut. The disk 4 is fixed to the ring body 8 and the central part thereof is attached to the axle of the agricultural machine. An axle attaching portion 13 that is attached to the axle of the agricultural machine is formed at the center of the disk 4. The axle mounting portion 13 includes a hole formed through the central portion of the disk 4 and a plurality of small holes formed around the hole.

  A mounting hole 14 for mounting the fastening means 12 is formed in the mounting portion 8 c of the ring body 8. Similarly, a mounting hole 15 for mounting the fastening means 12 is formed in the disk 4. The mounting holes 14 and 15 are formed so as to penetrate through the mounting portion 8 c of the ring body 8 and the thickness direction of the disk 4. A plurality of mounting holes 14 and 15 are formed in the mounting portion 8c of the ring body 8 and the disk 4, respectively. The number of mounting holes 14 and 15 in this embodiment is 6 respectively.

  The attachment holes 14 and 15 are formed at a predetermined pitch in the circumferential direction of the ring body 8 and the disk 4. For example, when the mounting holes 14 and 15 are formed in the mounting portion 8c of the ring body 8 and the disk 4, it is desirable that the pitch circle diameter of the mounting holes 14 and 15 is as large as possible. By doing so, the attachment hole 14 of the ring body 8 is formed away from the center of the wheel body 1 in the radial direction and close to the elastic ring portion 2. The mounting hole 15 of the disk 4 is formed away from the center (axle mounting portion 13). Thereby, the strength of the agricultural wheel 1 when the disk 4 is fixed to the wheel body 3 can be maintained high. Further, the attachment hole 14 of the ring body 8 is as close as possible to the elastic ring portion 2, so that the circular hole 8 a of the ring body 8 can be formed larger. Thereby, the ring body 8 can be reduced in weight, and the material cost of the ring body 8 can be reduced.

It is desirable that b ≧ 0.6a, where b is the pitch circle diameter of the mounting holes 14 and 15 and a is the inner diameter of the elastic ring portion 2. Thereby, when the disk 4 is attached to the wheel main body 3, the strength of the agricultural wheel 1 can be maintained high.
As shown in FIG. 2, the outer diameter c of the disk 4 is set larger than the inner diameter a of the elastic ring portion 2. Thereby, when the disc 4 is attached to the wheel body 3, there is no gap between the side view disc 4 and the elastic wheel portion 2, and the agricultural wheel 1 has a good appearance.

The disc 4 is painted before being attached to the wheel body 3. The disk 4 is coated by various coating means such as melamine baking coating, cationic electrodeposition coating, and powder coating.
The disk 4 is fixed to the wheel body 3 by aligning its mounting hole 15 with the mounting hole 14 of the ring body 8, inserting bolts of the fastening means 12 into these, and tightening with nuts.
When the disk 4 is fixed to the wheel body 3, the spoke 9 is covered with the disk 4. At this time, the disk 4 and the covering portion 11 are in close contact with each other. As a result, the disk 4 and the spoke 9 do not come into contact with each other, and wear and damage due to the contact between the spoke 9 and the disk 4 are prevented.

When the agricultural wheel 1 is mounted on the axle of an agricultural machine, the disk 4 faces outward in the axle direction. Therefore, the ring body 8, the spokes 9, etc. are hidden behind the disk 4 and cannot be seen.
According to the agricultural wheel 1 described above, the wheel main body 3 and the disk 4 are separated, and the disk 4 is configured to be fixed to the ring body 8 of the wheel main body 3 via the fastening means 12. By painting the disk 4 in advance, it is not necessary to mask the elastic ring portion 2 of the wheel body 3, and the painting operation can be easily performed.

Moreover, since the agricultural wheel 1 is configured such that when the disk 4 is fixed to the wheel body 3, the spoke 9 is covered with the disk 4, it is not necessary to paint the spoke 9, and the workability is further improved. It is a good thing.
Moreover, since the rim 5 and the spoke 9 are formed of pipes, the agricultural wheel 1 can be reduced in weight and the manufacturing cost can be reduced.

In the agricultural wheel 1 according to the present invention, since the wheel body 3 and the disk 4 are separated, even if the shape of the axle of the agricultural machine is different, the disk 4 can be replaced accordingly. It becomes a high quality thing. And since the production lot of the wheel main body 3 increases and the number of possession sizes can also be reduced, the production process of the agricultural wheel 1 is rationalized.
When discarding the agricultural wheel 1, it is necessary to separate the metal part and the rubber part. From this point, since the wheel body 3 and the disk 4 are separated, there is an advantage in terms of disposal and recycling. In addition, since the rubber mold for forming the elastic ring portion 2 can be used as it is for the conventional spoke type, the agricultural wheel 1 can be manufactured without manufacturing a new mold, and the manufacturing cost is suppressed. it can.

In the second embodiment of FIGS. 3 and 4, the shapes of the disk 4, the ring body 8, the spoke 9, and the disk 4 are different from those of the first embodiment.
The disc 4 does not have the annular convex portion 4a as in the first embodiment. The disk 4 is formed by pressing so that the center part protrudes to one side in the plate thickness direction of the disk 4.

The ring body 8 is made of an annular disk member. The ring body 8 is not formed with the rib 8b as in the first embodiment. Similar to the first embodiment, the ring body 8 is formed with a circular hole 8a.
A cylindrical pipe is used for the spoke 9. One end of the pipe is crushed flat by pressing. As a result, a flat fixing portion 9 a fixed to the ring body 8 is formed at one end of the spoke 9. One surface of the fixing portion 9a of the spoke 9 is fixed to the attachment portion 8c of the ring body 8 by welding or the like.

As shown in FIG. 4, an attachment hole 16 for attaching the fastening means 12 is formed in the fixing portion 9 a so as to coincide with the attachment hole 14 formed in the ring body 8. The other end of the spoke 9 is fixed to the rim 5 by welding or the like.
Other configurations of the agricultural wheel 1 according to the second embodiment are the same as those of the agricultural wheel 1 according to the first embodiment. Parts common to the agricultural wheel 1 according to the second embodiment are common to the agricultural wheel 1 according to the first embodiment. In the second embodiment, as in the first embodiment, the wheel body 3 and the disk 4 are separated from each other, and the disk 4 is fixed to the ring body 8 of the wheel body 3 via the fastening means 12. Therefore, by painting the disk 4 in advance, it is not necessary to mask the elastic ring portion 2 of the wheel body 3, and the painting operation can be easily performed.

Furthermore, since the fixing portion 9a of the spoke 9 is formed by being flattened, foreign matter such as water, mud, and adhesive during vulcanization molding of the elastic ring portion 2 is prevented from entering the spoke 9. Has been.
Further, since the fixing portion 9a of the spoke 9 is formed in a flat shape and fixed to the ring body 8, the ring body 8 does not need to have the rib 8b as in the first embodiment, and this ring body. Thus, the manufacturing cost of the agricultural wheel 1 can be reduced by omitting the labor of processing No. 8.

5 and 6, the configuration of the disk 4 is different from that of the first embodiment. A boss portion 17 attached to the axle of the agricultural machine is provided at the center of the disk 4. The boss portion 17 is fixed to the disk 4 by welding or the like.
A plurality of reinforcing plates 18 are provided between the boss portion 17 and the disk 4. In the third embodiment, the number of reinforcing plates 18 is three. As shown in FIG. 5, the plurality of reinforcing plates 18 are provided radially in the radial direction of the disk 4 with the boss portion 17 as the center.

The reinforcing plate 18 is fixed to the disk 4 and the boss portion 17 by welding or the like. As shown in FIG. 6, the reinforcing plate 18 is provided between the boss portion 17 and the annular convex portion 4 a of the disk 4. As shown in FIG. 6, the width of the reinforcing plate 18 gradually increases from the annular convex portion 4 a toward the boss portion 17.
Other configurations of the agricultural wheel 1 according to the third embodiment are substantially the same as those of the first embodiment. The parts common to the agricultural wheel 1 according to the third embodiment are the same as those of the agricultural wheel 1 according to the first embodiment.

  As with the agricultural wheel 1 according to the first embodiment, the agricultural wheel 1 according to the third embodiment has a wheel main body 3 and a disk 4 separated from each other. The disk 4 is connected to the wheel main body 3 via a fastening means 12. Since it is configured to be fixed to the ring body 8, it is not necessary to mask the elastic ring portion 2 of the wheel body 3 by painting the disk 4 in advance, and the painting work can be easily performed. .

Further, by reinforcing the boss portion 17 and the disk 4 with the reinforcing plate 18, the overall strength of the agricultural wheel 1 can be increased.
The present invention is not limited to the above-described embodiment, and various changes and modifications can be made.
For example, the fastening means 12 is not limited to bolts and nuts, and a prepainted disc 4 may be attached to the ring body 8 of the wheel body 3 using rivets or the like. By using rivets as the fastening means 12, the disc 4 is securely and firmly attached to the wheel body 3.

  The number of mounting holes 14 and 15 formed in the ring body 8 and the disk 4 may be a plurality of seven or more. The number of the spokes 9 may be four or more. The number of the reinforcing plates 18 may be four or more. The boss portion 17 and the reinforcing plate 18 exemplified in the third embodiment may be provided on the disk 4 shown in the second embodiment.

  The present invention can be used for a wheel of an agricultural machine.

It is a side view of the agricultural wheel which shows 1st Embodiment of this invention. It is an AA arrow line sectional view of FIG. It is a side view of the agricultural wheel which shows 2nd Embodiment of this invention. It is a BB arrow line sectional view of Drawing 3. It is a side view of the agricultural wheel which shows 3rd Embodiment of this invention. It is CC arrow directional cross-sectional view of FIG.

DESCRIPTION OF SYMBOLS 1 Agricultural wheel 2 Elastic ring part 3 Wheel body 4 Disc 5 Rim 6 Elastic material 8 Ring body
8b rib
8c Mounting portion 9 Spoke 12 Fastening means 14 Mounting hole 15 Mounting hole 17 Boss portion 18 Reinforcing plate

Claims (7)

A wheel body having an elastic ring portion formed by covering an annular rim with an elastic material;
Comprising a disk mounted on the axle, and
Before cut arm is, is fixed to the ring of the annular via a plurality of spokes extending radially it is formed in the pipe,
Agricultural wheel the disc, characterized in that it is fixed to the front Symbol ring body through a fastening means so as to cover the spokes when viewed from the rotation axis direction. The ring body is
A cylindrical rib extending in the direction of the rotation axis at the radially outer end;
An annular attachment portion that is continuous with one end of the rib in the direction of the rotation axis and that forms a substantially right angle with the rib in a cross section including the rotation axis and extends radially inward,
The agricultural wheel according to claim 1, wherein the spoke is fixed to an outer peripheral surface of the rib . The agricultural wheel according to claim 1 or 2 , wherein the fastening means includes a bolt and a nut . The agricultural wheel according to claim 1 or 2 , wherein the fastening means comprises a rivet . At the center of the disc, a boss portion attached to the axle is provided,
The agricultural wheel according to any one of claims 1 to 4 , wherein a reinforcing plate is provided between the boss portion and the disk . In the disk and ring body, mounting holes for attaching fastening means are formed at a predetermined pitch in the circumferential direction of the ring body and the circumferential direction of the disk,
The pitch circle diameter of the mounting hole and is b, the inside diameter of the elastic ring portion when an a, claim 1, characterized in that there is a b ≧ 0.6a to any one of claims 5 Agricultural wheels as described. The agricultural wheel according to any one of claims 1 to 6 , wherein the rim is formed of a pipe .

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