JP2007326405A - Agricultural wheel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To endure long-term use, minimizing exposure of metallic portions of agricultural wheels. <P>SOLUTION: This agricultural wheel 1 includes a ring-shaped rim 2, a rubber wheel portion 3 covering the rim 2 and formed with a rug 6 on an outer-periphery surface thereof, a boss portion 4 mounted on an axle and a plurality of metallic spoke 5 having the rim 2 connected with the boss portion 4, and the spoke 5 is covered with a vulcanizingly bonded rubber layer 7a. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an agricultural wheel used in an agricultural machine such as a rice transplanter.

Conventional agricultural wheels include, for example, a central boss portion, a plurality of spokes provided radially on the boss portion, a rim welded to the tip of the spoke, and an elastic material such as rubber covering the rim. (Spoke type) having a ring body (see, for example, Patent Document 1). Conventional agricultural wheels are provided with reinforcing plates for reinforcing these spokes.
As other agricultural wheels, those having a disk part (wheel part) attached to the end of an axle of an aircraft body such as a rice transplanter with a fastening member such as a bolt, and a rubber part attached to the outer peripheral part of this disk part ( Disk type) (see, for example, Patent Document 2).
Japanese Patent No. 3183593 (paragraph 0013, FIG. 2 etc.) JP 2000-238504 A (paragraph 0024, FIG. 1, etc.)

In conventional agricultural wheels, spokes, reinforcing plates and disk portions are made of metal, and these are often exposed.
For this reason, in the manufacturing process, it is necessary to paint the spokes, reinforcing plate and disk part, which has an adverse effect on cost and productivity, and quality control of the surface such as gloss, scratches and film thickness. Is also needed.
Further, even when the spokes and the disc part are coated, the paint may be damaged by long-term use, and the spokes and the disk part may be exposed to cause rust. Moreover, there is a possibility that rust from the interface portion between the spoke and the ring body may progress to the rim due to long-term use.

  This invention is made | formed in view of such a situation, and it aims at providing the agricultural wheel which can endure long-term use while reducing the exposure of a metal part as much as possible.

In order to solve the above problems, the present invention has taken the following technical means.
That is, the agricultural wheel according to the present invention includes a ring-shaped rim, a rubber wheel that covers the rim and has a lug formed on its outer peripheral surface, a boss that is attached to the axle, a rim and a boss. Agricultural wheels having a plurality of metal spokes that connect to each other, wherein the spokes are covered with a vulcanized rubber layer.
According to this, since the rim is covered with the rubber ring and the spoke is covered with the rubber layer, the agricultural wheel has almost no metal part exposed, thereby preventing the occurrence of rust and the like. At the same time, it can withstand long-term use.

The agricultural wheel according to the present invention includes a metal reinforcing plate that reinforces the plurality of spokes, and the reinforcing plate is covered with a rubber layer that is vulcanized and bonded.
According to this, in addition to the coating of the spoke rubber layer, the spoke reinforcing plate is also covered with the rubber layer, so that the agricultural wheel has almost no metal part exposed, thereby preventing the occurrence of rust and the like. At the same time, it can withstand long-term use.
The agricultural wheel according to the present invention is characterized in that a space between the plurality of spokes is covered with a vulcanized rubber layer.

According to this, by covering the spokes with the rubber layer, almost the entire side part of the agricultural wheel is covered with the rubber layer, thereby preventing the occurrence of rust and the like and the agricultural wheel for a long time. Can withstand use. Furthermore, agricultural wheels can reduce the lifting of mud during travel.
Further, the agricultural wheel according to the present invention is an agricultural wheel provided with a metal disc-shaped wheel portion and a rubber wheel portion provided around the wheel portion. It is characterized by being covered with a rubber layer.

  According to this, since the wheel portion is covered with the rubber layer, the agricultural wheel has almost no exposure of the metal portion, thereby preventing the occurrence of rust and the like and capable of withstanding long-term use. .

  According to the present invention, it is possible to minimize the exposure of the metal portion as much as possible and withstand long-term use.

The best mode for carrying out the present invention will be described below with reference to the drawings.
In the first embodiment shown in FIGS. 1 and 2, the agricultural wheel 1 according to the present invention is attached to the axle of an agricultural machine such as a rice transplanter.
The agricultural wheel 1 is of a so-called spoke type, and connects the rim 2, a rubber wheel portion 3 covering the rim 2, a boss portion 4 attached to an axle, and the rim 2 and the boss portion 4. And a plurality of (three in the illustrated example) metal spokes 5.
The rim 2 is formed by forming a round pipe made of metal such as iron into a ring shape (annular shape). One end of the spoke 5 is fixed to the rim 2 by welding. The rim 2 is almost entirely covered with the rubber ring portion 3.

  The rubber wheel portion 3 is formed by vulcanizing and bonding rubber in an annular shape so as to cover the outer peripheral surface of the rim 2. The rubber wheel portion 3 has a plurality of lugs 6 on the outer peripheral surface thereof. The plurality of lugs 6 include a center lug 6a and a side lug 6b. The center lug 6a is a central portion in the width direction of the rubber wheel 3, and is formed along the circumferential direction. Each center lug 6a is formed at a certain interval in the circumferential direction of the rubber ring portion 3. The side lugs 6b are provided so as to extend from the side portion of the center lug 6a toward the outer side in the width direction of the rubber ring portion 3. The side lugs 6b are arranged in a zigzag pattern on the left and right in the width direction of the rubber ring portion 3 with the center lug 6a as a boundary.

The spoke 5 is composed of a straight tubular round pipe made of metal such as iron. The spoke 5 is entirely covered with a rubber layer 7.
The rubber layer 7 a is formed in a cylindrical shape so as to cover the outer peripheral surface of the spoke 5. This rubber layer is bonded and fixed to the spoke 5 by vulcanization. One end portion in the longitudinal direction of the rubber layer 7 a is formed integrally with the rubber ring portion 3. The rubber layer 7a preferably has a thickness of 2 mm or more.
As shown in FIG. 1, a cavity 8 is formed between the spokes 5 of the agricultural wheel 1 in a side view.

The spoke 5 is made of metal and reinforced by a disk-shaped reinforcing plate 9. The reinforcing plate 9 is provided concentrically with the boss portion 4. One end of the reinforcing plate 9 is fixed to the spoke 5 and the other end is fixed to the boss 4 by welding or the like. A circular hole 10 is formed at the center of the reinforcing plate 9. The hole 10 is formed slightly larger than the boss portion 4. When the agricultural wheel 1 is attached to an agricultural machine, the side on which the reinforcing plate 9 is provided faces the outside.
The front and back surfaces of the reinforcing plate 9 are covered with a rubber layer 7b. The rubber layer 7 b also covers the periphery of the hole 10 formed in the reinforcing plate 9. The rubber layer 7 b is formed integrally with the rubber layer 7 a that covers the spoke 5. The rubber layer 7b is formed by adhering rubber to the reinforcing plate 9 by vulcanization. The thickness of the rubber layer 7b is desirably 2 mm or more.

With the rubber layer 7a covering the spoke 5 and the rubber layer 7b covering the reinforcing plate 9, the agricultural wheel 1 is covered with rubber on all metal parts except the boss part 4. The covering with the rubber layers 7 a and 7 b can be performed at the same time when the rubber ring portion 3 is vulcanized and bonded to the rim 2. As a result, the process of coating the spokes 5 and the reinforcing plate 9 as in the prior art can be omitted, and the agricultural wheel 1 stable in terms of quality can be manufactured while reducing productivity and cost.
Thus, by covering each spoke 5 and the reinforcing plate 9 with the rubber layer 7 (7a, 7b), it is possible to prevent the occurrence of rust and the like on these metal parts. It will be able to withstand work. Further, by setting the thickness of the rubber layer 7a to 2 mm or more, deterioration due to over-vulcanization of the rubber can be prevented, and when the rubber layer 7 (7a, 7b) is damaged, the damage is spread. Can be prevented.

  3 and 4, the shapes of the spokes 5 and lugs 6 and the shape of the reinforcing plate 9 are different from those of the first embodiment. In the second embodiment, the spoke 5 is formed by bending a straight pipe made of metal. The spoke 5 includes a straight pipe portion 5 a that is connected and fixed to the boss portion 4, and a protruding portion 5 b that is formed in a protruding shape from the straight pipe portion 5 a to one side in the axial direction of the boss portion 4. The tip of the overhanging portion 5b is fixed to the rim 2 by welding. The rubber ring portion 3 formed so as to cover the rim 2 from this configuration is provided so as to protrude from the boss portion 4 to one side in the axial direction.

The spoke 5 is almost entirely covered with a rubber layer 7a. The rubber layer 7 a has a bent cylindrical shape corresponding to the shape of the spoke 5.
As shown in FIG. 3, the reinforcing plate 9 has a polygonal plate shape in side view. Ribs 9 a are formed on the periphery of the reinforcing plate 9. A circular hole 10 is formed at the center of the reinforcing plate 9. The reinforcing plate 9 has a rubber layer 7 covering the front and back surfaces, ribs 9a, and the periphery of the hole 10.
The plurality of lugs 6 formed on the outer peripheral surface of the rubber wheel portion 3 are composed of a center lug 6a and a blade lug 6c. As shown in FIG. 4, the blade lugs 6 c are formed so as to protrude in the width direction from both side portions of the rubber ring portion 3.

Other configurations of the second embodiment are the same as those of the first embodiment, and common portions are denoted by common reference numerals (hereinafter the same in other embodiments). The agricultural wheel 1 of 2nd Embodiment has the same effect as 1st Embodiment.
In the third embodiment shown in FIGS. 5 and 6, the shape of the rubber layer 7 (7c) covering the spoke 5 and the reinforcing plate 9 is different from that of the first embodiment. The rubber layer 7c shown in FIGS. 5 and 6 entirely covers the spokes 5 and the reinforcing plate 9, and also covers the region between the plurality of spokes 5 (the portion that has been defined as the cavity 8 in the first embodiment). is doing. Therefore, the agricultural wheel 1 according to the third embodiment is almost entirely covered with the rubber layer 7c on the side thereof. Other configurations of the third embodiment are the same as those of the first embodiment.

The agricultural wheel 1 of the third embodiment is such that the spokes 5 and the reinforcing plate 9 are covered with the rubber layer 7c, so that the metal portion is hardly exposed, thereby preventing the occurrence of rust and the like, and being used for a long time. Can withstand.
Furthermore, since the rubber layer 7c covers between the plurality of spokes 5, the agricultural wheel 1 is prevented from lifting mud during traveling. In the case of the first embodiment, the spoke 5 lifts the mud during traveling, and this mud may get on the crops or the like. In the third embodiment, the spoke 5 is covered with the rubber layer 7c. By doing so, since the cavity 8 between the spokes 5 as shown in the first embodiment is eliminated, the muddy soil is not lifted by the spoke 5, and the agricultural wheel 1 can suppress the muddy soil lift.

Moreover, in order to prevent the mud of the spoke 5 in the first embodiment from being lifted, it is conceivable to cover the spoke 5 with a metal plate or the like. In this case, however, the cost of the metal plate and the manufacturing process increase, which The total cost of the wheel 1 will become high.
In this respect, since the manufacturing process can be omitted by molding the rubber layer 7c together with the rubber wheel portion 3 as in the third embodiment, the total cost of the agricultural wheel 1 can be reduced.
In the fourth embodiment shown in FIGS. 7 and 8, as in the third embodiment, both sides of the agricultural wheel 1 are entirely covered with the rubber layer 7c. As shown in FIG. 8, the rubber layer 7c entirely covers the spokes 5 and the reinforcing plate 9, and also covers the region between the plurality of spokes 5 (the portion that has been defined as the cavity 8 in the second embodiment). is doing.

As in the second embodiment, the spoke 5 has a straight tube portion 5a that is bent in the middle thereof and connected to the boss portion 4, and projects from the straight tube portion 5a to one of the boss portions 4 in the axial direction. And an overhang portion 5b.
As shown in FIG. 8, the rubber layer 7 c is vulcanized and bonded along the bent shape of the spoke 5, and the central portion thereof is a portion on the outer peripheral side (near the rubber wheel portion 3). It is formed to be recessed in the axial direction of the agricultural wheel 1 than the portion).
Other configurations of the fourth embodiment are the same as those of the first embodiment. The agricultural wheel 1 according to the fourth embodiment has the same functions and effects as those of the third embodiment.

In the fifth embodiment shown in FIG. 9, the agricultural wheel 1 is almost entirely covered with a rubber layer 7c on the side thereof as in the fourth embodiment. A decorative portion 11 is provided on the surface of the rubber layer 7c.
As shown in FIG. 9, the decorative portion 11 is formed in a region between the spokes 5. The decorative portion 11 is formed by partially applying a pattern or design to the rubber layer 7c. In addition, you may form this decoration part 11 by making the rubber layer 7c partially thick, and attaching a stamp.

Thus, by forming the decorative portion 11 on the rubber layer 7c that covers the entire side of the agricultural wheel 1, the appearance and design of the agricultural wheel 1 are improved, thereby increasing the commercial value of the agricultural wheel 1. Can be higher. Other configurations of the fifth embodiment are the same as those of the fourth embodiment. The agricultural wheel 1 according to the fourth embodiment has the same operational effects as the fourth embodiment.
In the sixth embodiment of FIG. 10, the agricultural wheel 1 is of a so-called disk type, and is made of a metal disk-shaped wheel portion 13 (disk portion) and a rubber provided around the wheel portion 13. Annulus 3 is provided.

As shown in FIG. 10, the end portion (outer peripheral portion) in the radial direction of the wheel portion 13 and the center portion thereof are bent in the plate thickness direction by press molding. A rubber ring portion 3 is integrally provided at a bent portion of the end portion of the wheel portion 13 in the radial direction. The central portion of the wheel portion 13 serves as an axle mounting portion 14.
The rubber wheel portion 3 is formed in an annular shape so as to cover the outer peripheral portion of the wheel portion 13. The rubber wheel part 3 is bonded and fixed to the wheel part 13 by vulcanization.
The wheel portion 13 has a front surface and a back surface covered with a rubber layer 7d. The rubber layer 7d is formed by vulcanizing and bonding rubber to the wheel portion 13. As shown in FIG. 10, the rubber layer 7 d is formed integrally with the rubber wheel portion 3. The thickness of the rubber layer 7d is desirably 2 mm or more.

In the sixth embodiment, the wheel part 13 is almost entirely covered with the rubber wheel part 3 and the rubber layer 7d. Therefore, the agricultural wheel 1 has almost no metal part exposed, prevents the occurrence of rust and the like, and can withstand long-term use.
The seventh embodiment of FIG. 11 shows a disc-type agricultural wheel 1 as in the sixth embodiment. The seventh embodiment is different from the sixth embodiment in that the rubber wheel portion 3 is detachably attached to the disc-shaped wheel portion 13 of the agricultural wheel 1.
The agricultural wheel 1 has a rim 2 having a ring shape similar to that of the first embodiment, and the rubber wheel portion 3 is formed in an annular shape so as to cover the entire surface of the rim 2. The rubber wheel portion 3 is bonded to the rim 2 by vulcanization.

A plurality of lugs 6 are formed on the outer peripheral surface of the rubber wheel portion 3. An attachment portion 16 that is attached to the wheel portion 13 is provided on the inner peripheral side of the rubber wheel portion 3.
The attachment portion 16 is formed by welding and fixing a metal ring-shaped circular plate to the rim 2. The mounting portion 16 is entirely covered with the rubber layer 7e. The rubber layer 7e is formed by adhering rubber to the mounting portion 16 by vulcanization. The rubber layer 7e covering the mounting portion 16 and the rubber wheel portion 3 are integrally formed by vulcanization.
As in the sixth embodiment, the wheel portion 13 is made of metal and is formed in a disk shape, and the front and back surfaces thereof are covered with a rubber layer 7f. The rubber layer 7 f is formed by vulcanizing and bonding rubber to the wheel portion 13. The rubber layers 7e and 7f are preferably 2 mm or more in thickness.

  Holes for attaching fasteners such as bolts and nuts are formed in the attachment part 16 of the rubber wheel part 3 and the wheel part 13, and the hole of the attachment part 16 and the hole of the wheel part 13 are made to coincide with each other. The rubber wheel part 3 is attached to the wheel part 13 by fastening and fixing both of them with this fastener. Note that holes 17 larger than the holes formed in the attachment portion 16 and the wheel portion 13 are formed in the rubber layers 7e and 7f so that the bolts and nuts are fastened securely. As a result, the bolts and nuts can be brought into direct contact with and fastened to the mounting portion 16 and the outer surface of the wheel 13, and the rubber wheel portion 3 is securely and firmly fixed to the wheel portion 13. .

  In 7th Embodiment, the wheel part 13 and the attachment part 16 of the rubber wheel part 3 are coat | covered with the rubber layer 7 (7e, 7f), and the agricultural wheel 1 has almost no metal part exposed, This prevents the occurrence of rust and the like and can withstand long-term use.

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

It is a side view of the agricultural wheel which concerns on 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 concerns on 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 concerns on 3rd Embodiment of this invention. It is CC arrow directional cross-sectional view of FIG. It is a side view of the agricultural wheel which concerns on 4th Embodiment of this invention. It is DD sectional view taken on the line of FIG. It is a side view of the agricultural wheel which concerns on 5th Embodiment of this invention. It is sectional drawing of the agricultural wheel which concerns on 6th Embodiment of this invention. It is sectional drawing of the agricultural wheel which concerns on 7th Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Agricultural wheel 2 Rim 3 Rubber ring part 4 Boss part 5 Spoke 6 Lug 7a Rubber layer 7b Rubber layer 7c Rubber layer 7d Rubber layer 7e Rubber layer 7f Rubber layer 8 Reinforcement board 13 Wheel part

Claims (4)

  A ring-shaped rim, a rubber ring that covers the rim and has a lug formed on its outer peripheral surface, a boss that is attached to the axle, and a plurality of metal spokes that connect the rim and the boss. Agricultural wheel, characterized in that the spoke is covered with a rubber layer bonded by vulcanization.   The agricultural wheel according to claim 1, further comprising a metal reinforcing plate that reinforces the plurality of spokes, and the reinforcing plate is covered with a vulcanized rubber layer.   The agricultural wheel according to claim 1 or 2, wherein a space between the plurality of spokes is covered with a rubber layer bonded by vulcanization. In an agricultural wheel comprising a metal disc-shaped wheel portion and a rubber wheel portion provided around the wheel portion, the wheel portion is covered with a rubber layer bonded by vulcanization. Agricultural wheels characterized by.

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