JP2008037193A - Agricultural wheel and agricultural machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an agricultural wheel having excellent durability which is capable of preventing exposure of spokes caused by abrasion of a cylindrical part by suppressing the abrasion through the abutting of a protective part on a mud-scraping body, and preventing any corrosion of the spokes. <P>SOLUTION: The agricultural wheel 6 is attached to an agricultural machine 2 having a mud scraping device 8 provided with a mud-discharging member having a mud-scraping body 46 for scraping mud deposited on the wheel 6 and a supporting member for supporting the mud-discharging member. The wheel 6 comprises a steel wheel having a hub and spokes 20 extending from the hub outwardly in the radial direction, an elastic ring body 14 for covering an outer side in the radial direction of the steel wheel, and a protective part 16. The elastic ring body 14 comprises a body, and a cylindrical part which is located on the inner side in the radial direction of the body and wound around the spokes 20. The protective part 16 covers the cylindrical part. Preferably, in this wheel 6, the cylindrical part is connected to the body. The protective part 16 is located on the body side in this cylindrical part. Preferably, in this wheel 6, the cylindrical part has a recess, and the protective part 16 is fitted in this recess. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an agricultural wheel and an agricultural machine.

  In the rice transplanter, a wheel having an elastic ring body is used in order to ensure stable propulsion in a soft ground such as a paddy field. This elastic ring body is formed by coating an elastic material such as a rubber material on an annular rim attached to the end of a spoke extending radially outward from the hub.

  When the rice transplanter runs on the paddy field, mud adheres to the wheels. Since the wheel is rotating, mud is lifted upward while adhering to the wheel. And due to its own weight, mud falls from the wheel. When the rice transplanter is traveling on a paddy field, the mud that has fallen causes the seedlings that have just been planted to be covered with mud, broken, and fallen. When the rice transplanter is traveling on a paved road, the road is soiled. There are similar problems in agricultural machinery other than rice transplanters.

Japanese Laid-Open Patent Publication No. 2001-80473 discloses a mud removing device that scrapes off mud adhering to a wheel by utilizing the rotation of the wheel. This device includes a large frame that can surround the front, rear, left and right of the wheel. The front part and the rear part of the frame body scrape off mud adhering to the tread surface of the wheel. A blade made of an elastic material is fixed to the inside of the side surface of the frame, and the blade scrapes off mud adhering to the side surface of the wheel.
JP 2001-80473 A

  In an agricultural machine provided with a mud removing device, in order to scrape off mud adhering to the inner surface of a wheel, a mud body extending in the axial direction may be arranged along the inner surface. The wheel of this agricultural machine is provided with a cylindrical portion that is connected to the inside of the elastic ring body in the radial direction and is wound around the spoke. When the wheel rotates and the cylinder part comes into contact with the mud, the cylinder part is urged to be worn out. As wear progresses, the spokes are exposed. This exposure may cause corrosion of the spokes. The progress of this corrosion promotes peeling of the elastic ring body. Such a wheel is inferior in durability.

  An object of the present invention is to provide an agricultural wheel having excellent durability.

  The agricultural wheel which concerns on this invention is a wheel of the agricultural machine provided with the mud dropping device which has the mud removing member which has the mud which scrapes off the mud adhering to the wheel, and the support member which supports this mud removing member. The wheel includes a steel wheel including a hub and spokes extending outward in the radial direction from the hub, an elastic ring body that covers a radially outer side of the steel wheel, and a protection unit. The elastic ring body includes a main body and a cylindrical portion that is positioned on the inner side in the radial direction of the main body and is wound around the spoke. This protection part covers this cylinder part.

  Preferably, in this wheel, the cylindrical portion is connected to the main body. The protective part is located on the main body side in the cylindrical part.

  Preferably, in this wheel, the cylinder part is provided with a recess. The said protection part is engage | inserted in this hollow.

  Preferably, in this wheel, the protective device includes fastening means. With this fastening means, the protection part is fixed to the cylinder part.

  Preferably, in this wheel, the elastic ring body is made of a crosslinked rubber composition. A mold is used for this crosslinking. The rubber composition is filled and crosslinked after the steel wheel and the protective part are put into the mold, so that the protective part is fixed to the cylindrical part while the cylindrical part is formed.

  An agricultural machine according to the present invention includes an airframe, a wheel attached to the airframe, a mud drain member having a mud body that scrapes off mud adhering to the wheel, and a support member that supports the mud drain member. With a mud dropping device. The mud body is configured to bend when a force is applied along the rotation direction of the wheel, and to recover its shape when the force is removed. This mud removing device is configured such that mud adhering to the mud body is removed by vibration. The wheel includes a steel wheel including a hub and spokes extending outward in the radial direction from the hub, an elastic ring body that covers a radially outer side of the steel wheel, and a protection unit. The elastic ring body includes a main body and a cylindrical portion that is positioned on the inner side in the radial direction of the main body and is wound around the spoke. The tube portion is connected to the main body. The protection portion is located on the main body side in the cylindrical portion. This protection part covers this cylinder part.

  In the agricultural wheel attached to this agricultural machine, the protection part comes into contact with the mud body, so that the wear of the cylinder part is suppressed. This prevents exposure of the spokes due to this wear. With this wheel, the spoke does not corrode. This wheel is excellent in durability. In an agricultural machine equipped with this wheel, the frequency of replacing a used wheel with a new wheel can be reduced. This wheel can reduce the maintenance cost of this agricultural machine.

  Hereinafter, the present invention will be described in detail based on preferred embodiments with appropriate reference to the drawings.

  FIG. 1 is a side view showing an agricultural machine 2 according to an embodiment of the present invention. The agricultural machine 2 includes an airframe 4, wheels 6, a first mud removing device 8, and a second mud removing device 10. The machine 4 is equipped with equipment for functioning as a rice transplanter. The wheel 6 is attached to the body 4. This agricultural machine 2 is a four-wheel type rice transplanter. In this agricultural machine 2, the first mud removing device 8 and the second mud removing device 10 are attached to a wheel 6 (rear wheel) located behind the agricultural machine 2. In FIG. 1, the vertical direction of the paper surface represents the axial direction of the wheel 6. In FIG. 1, M is the mud adhering to the wheel 6.

  FIG. 2 is a partially cutaway side view showing the wheel 6 located behind the agricultural machine 2 in FIG. 1. FIG. 3 is an enlarged side view showing a part of the wheel 6 of FIG. In FIG. 3, the vertical direction is the radial direction of the wheel 6. 4 is a cross-sectional view taken along the radial direction of FIG. FIG. 5 is a cross-sectional view taken along line VV in FIG.

  The wheel 6 includes an iron wheel 12, an elastic ring body 14, and a protection unit 16. In this agricultural machine 2, the iron wheel 12 is composed of a hub 18, a spoke 20, and a rim 22. The hub 18 is located at the center of the wheel 6. The hub 18 is fitted with an axle.

  The spokes 20 extend radially outward from the hub 18 in the radial direction. The wheel 6 includes three spokes 20. From the viewpoint of reducing the weight of the wheel 6, the spoke 20 is made of a metal pipe. Examples of the material of the spoke 20 include steel and stainless steel. Stainless steel is preferred from the viewpoint of corrosion resistance. The spoke 20 is fixed to the hub 18 by welding. The spoke 20 may be fixed to the hub 18 by riveting or bolting. The wheel 6 may include four or more spokes 20.

  The rim 22 is attached to the end of the spoke 20. In the wheel 6, the rim 22 is fixed to the spoke 20 by welding. The rim 22 is annular. From the viewpoint of reducing the weight of the wheel 6, the rim 22 is made of a metal pipe. Examples of the material of the rim 22 include steel and stainless steel. Stainless steel is preferred from the viewpoint of corrosion resistance.

  The elastic ring body 14 is made of a crosslinked rubber composition. The elastic ring body 14 covers the rim 22 and a part of the spoke 20. In other words, the elastic ring body 14 covers the radially outer side of the iron wheel 12. The elastic ring body 14 includes a main body 24 and a cylindrical portion 26. The main body 24 includes a lug 28. The lug 28 includes a straight guide part 30 and a blade part 32. The straight guide portions 30 and the blade portions 32 are alternately arranged in the rotation direction of the wheel 6. The form of the lug 28 is appropriately determined in consideration of the specifications of the agricultural machine 2 and the like.

  The cylindrical portion 26 is located on the radially inner side of the main body 24. The cylindrical portion 26 is connected to the main body 24. The tube portion 26 is wound around the spoke 20. The tube portion 26 includes a recess 34.

  The protection part 16 covers the cylinder part 26. In the agricultural machine 2, the protective portion 16 is wound around the cylindrical portion 26. The protection part 16 is fitted in the recess 34. The recess 34 prevents a positional shift of the protection portion 16 with respect to the cylindrical portion 26. The protection portion 16 is located on the main body 24 side in the cylindrical portion 26. The protection unit 16 includes a bolt 36 and a nut 38 as fastening means. The protective portion 16 is fixed to the cylindrical portion 26 with the bolt 36 and the nut 38. In addition, this protection part 16 may be comprised so that only the range which can assume the contact with the mud body mentioned later of the cylinder part 26 may be covered.

  In this agricultural machine 2, the protection part 16 is formed by bending a metal plate material. Examples of the material of the protective portion 16 include steel and stainless steel. Stainless steel is preferred from the viewpoint of corrosion resistance. In addition, this protection part 16 may be comprised from a synthetic polymer material. In this case, the protection part 16 having a shape as shown in FIG. 3 is formed by a molding method such as injection molding or compression molding. Examples of the synthetic polymer material include polyethylene, polypropylene, polyvinyl chloride, polystyrene, and nylon.

  FIG. 6 is a partially enlarged plan view showing a part of the first mud dropping device 8 mounted on the agricultural machine 2 of FIG. In FIG. 6, the left-right direction on the paper surface represents the axial direction of the wheel 6. The mud drop device 8 includes a support member 40 and a mud discharge member 42. In FIG. 6, an alternate long and short dash line CL represents the equator plane of the wheel 6. In the agricultural machine 2, the second mud removing device 10 is configured such that mud adhering to the blade portion 32 provided on the lug 28 is scraped off.

  The support member 40 is attached to the body 4 and supports the mud discharge member 42. In the agricultural machine 2, the support member 40 extends rearward from the machine body 4. The support member 40 includes an arm 44 that extends along the side surface of the wheel 6. The configuration and attachment location of the support member 40 are determined in consideration of the form of the agricultural machine 2, the size of the wheels 6, and the like.

  The drainage member 42 includes a mud body 46 and a grasping body 48. The mud 46 extends in the axial direction from the support member 40 side, that is, the arm 44 side, toward the equator plane. This grasping body 48 is provided with a ring 50 at its outer end. The grasping body 48 is located between the arm 44 and the mud body 46, fixes the mud body 46, and holds the arm 44 with the ring 50. The ring 50 is configured to slide the arm 44 and be fixed at a predetermined position of the arm 44. In the agricultural machine 2, the position of the mud 46 can be adjusted according to the state of the field, the diameter of the wheel 6, the width of the wheel 6, the state of mud adhesion, and the like.

  In this agricultural machine 2, the arm 44 is made of a round bar. The arm 44 may be a square member having a rectangular cross section. The material of the arm 44 is preferably a metal material from the viewpoint of strength. Examples of the metal material include steel, aluminum alloy, and stainless steel. Stainless steel is preferred from the viewpoint of corrosion resistance.

  The mud body 46 is disposed so as to be located immediately above the protection part 16 in the cylinder part 26. The mud 46 is provided in a range overlapping with the protection unit 16 in the axial direction. The mud body 46 scrapes off mud adhering to the wheel 6. The mud 46 is configured to bend when a force is applied along the rotation direction of the wheel 6 and to recover its shape when the force is removed. The mud 46 repeats bending and shape restoration as the wheel 6 rotates. In this agricultural machine 2, the mud body 46 is a coil spring. Examples of the material of the mud body 46 include a metal material and a synthetic polymer material. From the viewpoint of strength, the material of the mud body 46 is preferably a metal material. Examples of the metal material include steel, aluminum alloy, and stainless steel. Stainless steel is preferred from the viewpoint of corrosion resistance. In addition, this mud body 46 may be comprised with the bar material which consists of rubber materials. In this case, examples of the rubber material include natural rubber, styrene-butadiene rubber, butadiene rubber, and isoprene rubber. From the viewpoint of versatility, natural rubber is preferable.

  7 is a cross-sectional view taken along line VII-VII in FIG. FIG. 7 shows a mud body 46, a part of the grasping body 48, and a part of the wheel 6 of this apparatus. With the rotation of the wheel 6, the spoke 20 approaches the mud body 46, and the protection unit 16 comes into contact with the mud body 46. In FIG. 7, an arrow line A represents the rotation direction of the wheel 6.

  FIG. 8 is a cross-sectional view illustrating a state in which the protection unit 16 is in contact with the mud body 46. When the protection unit 16 comes into contact with the mud body 46, force is applied to the mud body 46. Due to this force, the mud 46 is bent. The spoke 20 passes through the tip 52 of the mud 46 while bending the mud 46. When the spoke 20 passes through the tip 52, the force applied to the mud 46 is removed. Since the mud body 46 has a shape restoring property, when the force applied to the mud body 46 is removed, the mud body 46 returns to the state shown in FIG. In the agricultural machine 2, the slack body 46 is repeatedly bent and reconstructed. In FIG. 7 as well, the arrow line A represents the rotation direction of the wheel 6.

  In the wheel 6 attached to the agricultural machine 2, the protection part 16 comes into contact with the mud body 46, so that wear of the cylinder part 26 is suppressed. This prevents the spoke 20 from being exposed due to this abrasion. In the wheel 6, the spoke 20 does not corrode. This wheel 6 is excellent in durability. In the agricultural machine 2 to which the wheels 6 are attached, the replacement frequency from the used wheels 6 to the new wheels 6 can be reduced. The wheel 6 can reduce the maintenance cost of the agricultural machine 2.

  As described above, the mud body 46 is disposed so as to be located immediately above the protection part 16 in the cylinder part 26. In the agricultural machine 2, the wheel 6 rotates so that the mud 46 is along the inner surface of the wheel 6. Therefore, in this agricultural machine 2, the mud 46 reliably scrapes off the mud adhering to the inner surface of the wheel 6. Mud does not accumulate on the inner surface of the wheel 6.

  In this agricultural machine 2, each time the spoke 20 passes the tip 52 of the mud body 46, the mud body 46 repeats bending and shape restoration. Thereby, vibration is generated in the mud body 46. In the agricultural machine 2, the mud adhering to the mud body 46 is surely wiped off by this vibration. Therefore, in this agricultural machine 2, mud does not accumulate on this mud body 46. Because the scraped mud does not adhere and accumulate, no mud mass is formed.

  In this agricultural machine 2, since the protection part 16 is being fixed to the cylinder part 26 with fastening means like the nut 38 and the volt | bolt 36, replacement | exchange of the protection part 16 is easy.

  The manufacturing method of the wheel 6 mounted on the agricultural machine 2 is as follows. First, the hub 18, the spoke 20, and the rim 22 are integrated by welding to manufacture the iron wheel 12. Next, the steel wheel 12 is shot blasted to remove oil, dirt, and the like adhering to the steel wheel 12. Then, after an adhesive is applied to the rim 22 or the like covered with the elastic ring body 14, a baking process is performed. On the other hand, the rubber composition in which the elastic ring body 14 is formed is manufactured by a kneader such as a Banbury mixer. Next, the iron wheel 12 is put into a mold in which a rubber composition for forming the elastic ring body 14 is baked. By using a rubber injection machine, the rubber composition is injected and injected into the cavity of this mold. Thereby, the rubber composition is filled in the mold in which the iron wheel 12 is put. Thereafter, the rubber composition is pressurized and heated. By this pressurization and heating, the rubber composition is completely cross-linked, the elastic ring body 14 is molded, and the elastic ring body 14 is baked on the iron wheel 12. Next, the protection part 16 is fitted in the recess 34 provided in the cylinder part 26. Finally, the protection part 16 is fixed to the cylinder part 26 with a bolt 36 and a nut 38. In this way, the wheel 6 shown in FIG. 1 is obtained.

  FIG. 9 is a partially cutaway side view showing a wheel 54 provided in an agricultural machine according to another embodiment of the present invention. This agricultural machine includes an airframe, wheels 54, and a mud removing device. Although not shown, this agricultural machine is a four-wheel type rice transplanter. The structure of the airframe and the mud dropping device provided in this agricultural machine is the same as that of the agricultural machine 2 in FIG. The wheel 54 includes an iron wheel 56, an elastic ring body 58, and a protection unit 60. The elastic ring body 58 is made of a crosslinked rubber composition. The elastic ring body 58 includes a main body 64 including a lug 62 and a cylindrical portion 66 located on the inner side in the radial direction of the main body 64. This agricultural machine is the same as the agricultural machine 2 in FIG. 1 except for the configuration of the protection part 60 of the wheel 54. In FIG. 9, the vertical direction of the paper surface represents the axial direction of the wheel 54.

  FIG. 10 is an enlarged cross-sectional view showing a part of the wheel 54 of FIG. 11 is a cross-sectional view taken along line XI-XI in FIG. 10 and 11 show the protection part 60 and the cylinder part 66. FIG. The cylindrical portion 66 is wound around the spoke 68. The tube portion 66 includes a recess 70.

  The protection part 60 is cylindrical. The protection part 60 covers the cylinder part 66. The protection unit 60 is fitted in the recess 70. The recess 70 prevents a positional shift of the protection part 60 with respect to the cylinder part 66. The protection portion 60 is located on the main body 64 side in the cylindrical portion 66. In this agricultural machine, the protection unit 60 is made of stainless steel.

  The method for fixing the protection part 60 to the cylinder part 66 in the method for manufacturing the wheel 54 is as follows. First, the hub 72, the spoke 68, and the rim 74 are integrated by welding, and the iron wheel 56 is manufactured. At this time, the protection part 60 processed into the cylindrical shape is fitted to the spoke 68. After the adhesive is applied to the iron wheel 56, a baking process is performed and the mold is put into a mold. When the iron wheel 56 having the protective portion 60 fitted to the spoke 68 is put into the mold, the protective portion 60 is disposed at a position where the cylindrical portion 66 of the mold is formed. By using a rubber injection machine, the rubber composition is injected and injected into the cavity of this mold. Thereby, the rubber composition flows into between the protection part 60 and the spoke 68 while the rubber composition is filled in the mold in which the iron wheel 56 is put, and the cylinder part 66 is formed. Thereafter, the rubber composition is pressurized and heated. By this pressurization and heating, the rubber composition is completely cross-linked, the elastic ring body 58 is molded, and the elastic ring body 58 is baked on the iron wheel 56. In this way, the wheel 54 shown in FIG. 8 is obtained.

  In the wheel 54, the rubber composition is filled after the iron wheel 56 and the protective part 60 are put into the mold, whereby the cylindrical part 66 is formed and the protective part 60 is fixed to the cylindrical part 66. Therefore, in order to fix the protection part 60 to the cylinder part 66, the fastening means like a volt | bolt and a nut are not required like the agricultural machine 2 of FIG. In the manufacturing method of the wheel 54, the attachment process to the cylinder part 66 of the protection part 60 is reduced. The wheel 54 can contribute to productivity.

  In the agricultural machine to which the wheels 54 are attached, since the protective part 60 comes into contact with the mud body, abrasion of the cylindrical part 66 is suppressed. This prevents exposure of the spokes 68 due to this wear. In the wheel 54, the spoke 68 does not corrode. This wheel 54 is excellent in durability. In the agricultural machine to which the wheels 54 are attached, the frequency of replacement from the used wheels 54 to the new wheels 54 can be reduced. The wheel 54 can reduce the maintenance cost of the agricultural machine.

  In this agricultural machine, the wheel 54 rotates so that the mud body follows the inner surface of the wheel 54. Therefore, in this agricultural machine, the mud body reliably scrapes off the mud adhering to the inner surface of the wheel 54. Mud does not accumulate on the inner surface of the wheel 54.

  In this agricultural machine, every time the spoke 68 passes through the tip of the mud body, the mud body repeats bending and shape restoration. As a result, vibration is generated in the mud body. In this agricultural machine, the mud adhering to the mud body is surely wiped off by this vibration. Therefore, in this agricultural machine, mud does not accumulate on this mud body. Because the scraped mud does not adhere and accumulate, no mud mass is formed.

  The wheel mounted on the agricultural machine according to the present invention can be mounted on various working machines including a mud removing device.

FIG. 1 is a side view illustrating an agricultural machine according to an embodiment of the present invention. FIG. 2 is a partially cutaway side view showing a wheel mounted on the rear side of the agricultural machine of FIG. 1. FIG. 3 is an enlarged side view showing a part of the wheel of FIG. 4 is a cross-sectional view taken along the radial direction of FIG. FIG. 5 is a cross-sectional view taken along line VV in FIG. FIG. 6 is a partially enlarged plan view showing a part of the first mud dropping device mounted on the agricultural machine of FIG. 1 together with the wheels. 7 is a cross-sectional view taken along line VII-VII in FIG. FIG. 8 is a cross-sectional view illustrating a state in which the protection unit is in contact with the mud body. FIG. 9 is a partially cutaway side view showing a wheel provided in an agricultural machine according to another embodiment of the present invention. FIG. 10 is an enlarged cross-sectional view showing a part of the wheel of FIG. 11 is a cross-sectional view taken along line XI-XI in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 2 ... Agricultural machine 4 ... Airframe 6, 54 ... Wheel 8 ... 1st mud removal device 10 ... 2nd mud removal device 12, 56 ... Railway car 14, 58 .... Elastic ring body 16, 60 ... Protection part 18, 72 ... Hub 20, 68 ... Spoke 22, 74 ... Rim 24, 64 ... Main body 26, 66 ... Tube part 28 62 ... Lug 30 ... Straight guide part 32 ... Blade part 34, 70 ... Dimple 36 ... Bolt 38 ... Nut 40 ... Support member 42 ... Drainage member 44 ... Arm 46 ... Mud body 48 ... Grab body 50 ... Ring 52 ... Tip

Claims (6)

A wheel of an agricultural machine provided with a mud dropping device having a mud removing member having a mud that scrapes off mud adhering to the wheel and a supporting member for supporting the mud removing member,
A steel wheel including a hub and spokes extending radially outward from the hub, an elastic ring body that covers the radially outer side of the steel wheel, and a protection unit;
This elastic ring body is composed of a main body and a cylindrical portion that is positioned radially inside the main body and is wound around the spoke.
Agricultural wheels in which this protection part covers this cylinder part. The cylindrical portion is connected to the main body;
The wheel according to claim 1, wherein the protection part is located on the main body side in the cylindrical part. The cylinder part has a recess,
The wheel according to claim 1 or 2, wherein the protection part is fitted in the recess. The protection part includes a fastening means;
The wheel according to any one of claims 1 to 3, wherein the protection portion is fixed to the cylindrical portion by the fastening means. The elastic ring body is composed of a crosslinked rubber composition,
A mold is used for this crosslinking,
The rubber part is filled and crosslinked after the steel wheel and the protective part are put into the mold, and the protective part is fixed to the cylindrical part while forming the cylindrical part. The wheel according to any one of 1 to 3. A body, a wheel mounted on the body, a mud removing member having a mud body that scrapes off mud adhering to the wheel, and a support member that supports the mud member. And
This mud body is configured to bend when force is applied along the rotational direction of the wheel, and to recover its shape when the force is removed,
This mud dropping device is configured so that mud adhering to this mud body is wiped off by vibration,
The wheel includes a steel wheel including a hub and a spoke extending radially outward from the hub, an elastic ring body that covers a radially outer side of the wheel, and a protection unit.
This elastic ring body is composed of a main body and a cylindrical portion that is positioned radially inside the main body and is wound around the spoke.
This tube part is connected to this body,
This protective part is located on the main body side in this cylindrical part,
An agricultural machine in which this protective part covers this cylindrical part.

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