JP2007008345A - Wheel with rubber - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wheel with rubber capable of maintaining high appearance and durability by preventing the occurrence of rust for a long period even when traveling in the farm field. <P>SOLUTION: In a wheel 10 with rubber, an annular rubber part 22 integrally molded by vulcanization is mounted to a rubber mounting part 24 of a disc shape disc part 20 equipped with the rubber mounting part 24 at the outside diameter side, and the machine body assembly part 34 to the machine body 12 at the inside diameter side. The rubber thin film part 40 extended from the boundary part 26 between the rubber part 22 and the disc part 20 toward the inside of the disc in the radial direction to the machine body assembly part 34 is vulcanized and adhered to the opposite machine body side of the disc part 20. The thickness t of the rubber thin film part 40 is set to be 0.6 mm≤t≤5.0 mm. Since the rubber thin film part 40 prevents friction by separating the disc part 20 from mud even when the rubber part 22 and the disc part 20 sink during traveling in the farm field, the occurrence of rust is prevented for a long period and high-appearance and durability can be maintained. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a rubber wheel for an agricultural machine, and is particularly suitable for a wheel for a rice transplanter and a wheel for a regular management machine.

  Conventionally, as a wheel with rubber to be mounted on an agricultural machine, as shown in FIG. 5, rubber of a spoke type rim composed of a rubber portion 112, a spoke 114, a boss 116, a pipe-shaped metal core 118, and a reinforcing plate 120. 4, and a rubber-equipped wheel 130 of a disc-shaped rim constituted by a rubber part 132, a disk-shaped disk part 134, a rubber assembly part 136, and an airframe assembly part 138 as shown in FIG. 4. Here, the material of the spoke-type rim and the disc-shaped rim of a general rubber wheel is steel, and is coated in accordance with the application so that rust does not occur.

However, in any rubber wheel, when running in a muddy area or paddy field, if the wheel is a rubber wheel with a spoke-type rim, the mud is lifted and dropped between the spokes. There was a problem that mud was lifted and dropped at the boundary with the rubber part. As a countermeasure, in Japanese Patent Laid-Open No. 2003-118303, as shown in FIG. 1 of Japanese Patent Laid-Open No. 2003-118303, the jumping width of the rubber portion 22 on the airframe side and the non-aircraft side on the disk portion 20 at the boundary portion 24. , Making it difficult to lift mud on both the aircraft side and the non-aircraft side. Further, by providing the inclined surface 26 on the disk portion 20, it is possible to prevent the mud accumulated near the boundary portion 24 from growing greatly inward in the radial direction, and as a result, it is possible to prevent a large mud lump from falling. A rubberized wheel is disclosed.
JP 2003-118303 A

  Now, when the rubber-equipped wheels listed above are used to travel in the field, the rubber part, the spoke part or the disk part sinks in the mud and the disk part or the spoke part is in any rubber-equipped wheel. There is a risk of rubbing due to rubbing with mud and peeling off the paint on that part. If rust occurs, the appearance of the rubber-equipped wheel is impaired, and the durability of the spoke part or the disk part may be reduced.

  Here, even in the field, even if you drive in the field, it prevents paint peeling due to friction between the spokes or discs and mud, prevents rusting, does not impair the appearance, and maintains high durability. Rubber wheels that can be used are expected.

  The present invention has been made in consideration of the above facts, and an object thereof is to provide a rubber-equipped wheel that can prevent the generation of rust over a long period of time and maintain high appearance and durability even when traveling on a farm field.

  According to a first aspect of the present invention, there is provided a rubber-equipped wheel including a disk-shaped disk portion having a rubber mounting portion on the outer diameter side and a body assembly portion for mounting on the inner diameter side body, and the rubber mounting portion by vulcanization. A rubber-equipped wheel having an integrally formed annular rubber part, at least on the reaction machine side of the machine body side and the reaction machine side of the disk part, from a boundary part between the rubber part and the disk part A rubber thin film portion extending inward in the radial direction of the disk is provided by vulcanization and bonding, and when the thickness of the rubber thin film portion is t, 0.6 mm ≦ t ≦ 5.0 mm is satisfied.

  According to the said structure, the rubber | gum part and disc part of the wheel with rubber | gum during field driving | running | working are sinking in mud with the weight of the body, and mud is approaching along the disc part. Here, when the disk part rotates, friction is generated between the mud and the disk part, but the rubber thin film part separates the disk part and the mud and prevents friction between the disk part and the mud. Thereby, rust does not generate | occur | produce in a disc part, an external appearance is not impaired, and high durability can also be maintained.

  Further, if the thickness t of the rubber thin film portion is t <0.6 mm, the rubber thin film portion is worn out before the life of the rubber portion. Therefore, after the rubber thin film portion is worn away, friction between the disk portion and the mud occurs. , Rust occurs, the appearance of the disk part is impaired, and the durability may be reduced. If t> 5.0 mm, the rubber thin film portion will not wear out before the life of the rubber, and rust generation can be sufficiently prevented, but the amount of rubber used increases, resulting in an increase in cost. . Accordingly, the thickness t of the rubber thin film portion is preferably 0.6 mm ≦ t ≦ 5.0 mm. As a result, it is possible to prevent the generation of rust over a long period of time and maintain high appearance and durability even when traveling in the field.

  The rubber-equipped wheel according to claim 2 of the present invention is the rubber-equipped wheel according to claim 1, wherein the rubber thin film portion extends between the boundary portion and the airframe assembly portion. And

  According to the said structure, in addition to the effect | action of Claim 1, the following effects are show | played. As the rubber thin film part extends inward in the disk radial direction, even if the rubber part and the disk part sink into the mud during field running, it is difficult for the mud to damage the disk part beyond the rubber thin film part, Paint peeling is prevented. Thereby, generation | occurrence | production of the rust of a disc part is further prevented. In addition, since mud does not easily cross the boundary between the disk portion and the inner peripheral side end of the rubber thin film portion in the radial direction of the disk, the inner thin end portion of the rubber thin film portion receives when mud flows from the side surface of the disk portion. The load is suppressed and peeling of the rubber thin film portion from the inner peripheral end is prevented.

  In addition, when the rubber thin film part is extended from the airframe assembly part to the inside in the disk radial direction, the rubber thin film part may enter between the airframe and the airframe assembly part and the assembly of the disk may become unstable. . Therefore, it is preferable that the rubber thin film portion extends between the boundary portion and the airframe assembly portion.

  The rubber-equipped wheel according to claim 3 of the present invention is the rubber-equipped wheel according to claim 1 or 2, wherein the rubber portion is a boundary when the rubber portion is viewed in a cross section along the disk rotation axis direction. It is characterized in that it is wider from the portion toward the outer side in the disk radial direction.

  According to the said structure, in addition to the effect | action of Claim 1 or 2, the following effect | actions are show | played. When the disk part protected by the rubber part and the rubber thin film part sinks while traveling on the field, mud that is drawn along the disk part comes on this rubber part, but the rubber part is a cross-sectional shape along the disk rotation axis direction However, since the side of the rubber part is inclined with respect to the disk rotation axis direction, the mud flows down from the inclined side of the rubber part and accumulates. It becomes difficult. Moreover, since mud does not accumulate in the rubber part, friction between the rubber thin film part and mud is also suppressed, and the life of the rubber thin film part is extended.

  The rubber wheel according to a fourth aspect of the present invention is the rubber wheel according to any one of the first to third aspects, wherein the airframe assembly portion is formed in a planar shape perpendicular to the disk rotation axis, It is characterized in that it is located closer to the machine body than the outermost part in the disk rotation axis direction of the disk part on the side opposite to the machine body.

  According to the said structure, in addition to the effect | action of Claims 1 thru | or 3, the following effect | actions are show | played. By forming the airframe assembly portion in a planar shape perpendicular to the disc rotation axis, the airframe assembly portion can be attached in close contact with the wheel mounting surface of the airframe. If the fuselage assembly part is positioned on the fuselage side with respect to the disk axis direction outermost part on the opposite side of the disk part, the gap between the fuselage assembly part and the disk part on the opposite side of the disk side in the disk axis direction In addition, at least one refracting portion is provided, and the strength can be improved. Since the airframe assembly portion is the portion where the torque is most applied, the stress is dispersed and the deformation of the disk portion can be suppressed by being recessed through the refracting portion.

  The rubber-equipped wheel of the present invention can maintain high appearance and durability by preventing the generation of rust over a long period even when traveling on a farm field.

  [First Embodiment] A first embodiment according to the pneumatic tire of the present invention will be described with reference to FIGS. As shown in FIG. 1, the rubber-equipped wheel 10 of the present embodiment is a disc-shaped disk portion that is attached to an end portion 14 </ b> A of an axle 14 of a machine body 12 such as a rice transplanter by a fastening member such as a bolt 16 and a nut 18. 20 and an annular rubber portion 22 attached to the outer peripheral portion of the disk portion 20.

  The disk portion 20 is made of press sheet metal, and a rubber mounting portion 24 is formed on the outer peripheral side. The rubber part 22 is integrally formed with the rubber mounting part 24 by vulcanization. The rubber mounting portion 24 is in the vicinity of a boundary portion 26 between the annular flat surface portion 24A extending in the radial direction along the equator plane CL of the rubber portion 22 and the inner circumferential side end portion of the disk portion 20 and the rubber portion 22 in the disk radial direction. The first refracting portion 24B refracting toward the airframe side (arrow IN direction) and an extending portion 24C extending from the outer end in the disk radial direction of the first refracting portion 24B toward the airframe side (arrow IN direction). .

  The disk part 20 is arranged on the side opposite to the rubber part 22 (in the direction of the arrow OUT). Further, when viewed in a cross section along the rotating shaft 14C, the disk portion 20 is refracted toward the machine body (in the direction of the arrow IN) in the vicinity of the boundary portion 26 of the rubber portion 22 inside the disk radial direction. A portion 28 is formed, and an inclined surface 30 is formed on the inner side in the disc radial direction of the second refracting portion 28 so as to incline with respect to the disc radial direction so that the rotation center side is on the counter-machine side (arrow OUT direction). Has been. Further, the inclined surface 30 is not in a straight section, but is formed in an arc shape having a large curvature radius and having a center of curvature on the machine body side (in the direction of the arrow IN). A third refracting portion 32 that refracts toward the machine body (in the direction of the arrow IN) is formed on the inner side in the disk radial direction of the inclined surface 30. On the inner side in the disk radial direction of the third refracting portion 32, an annular body assembly portion 34 is formed which is perpendicular to the rotating shaft 14C and formed in a planar shape. Four holes 36 through which the bolts 16 are passed are formed at equal intervals in the machine assembly part 34.

  As shown in FIG. 1, the rubber part 22 has an inclined surface 38 having an angle with respect to the rotating shaft 14C so that the rubber part 22 becomes wider from the boundary part 26 toward the outer side in the disk radial direction. (IN direction).

  An annular rubber thin film portion 40 is integrally formed on the surface of the disk portion 20 on the side opposite to the machine body (in the direction of the arrow OUT) from the inner end of the rubber portion 22 in the disk radial direction. It is extended to. The rubber thin film portion 40 is vulcanized and bonded to the disk portion 20, and the inner peripheral side end of the rubber thin film portion 40 in the radial direction of the disk extends to the vicinity of the approximate center of the third refracting portion 32. In the present embodiment, the boundary between the inner peripheral side end of the rubber thin film portion 40 in the disk radial direction and the disk portion 20 is referred to as a boundary portion 26A. In addition, the portion of the disk portion 20 of the present embodiment where the metal surface is exposed is painted for the purpose of preventing rust.

  Moreover, it is preferable to satisfy 0.6 mm ≦ t ≦ 5.0 mm, where t is the thickness of the rubber thin film portion 40.

  As shown in FIG. 3, a large number of protrusions 46 are formed on the tread surface portion 44 (outer peripheral surface portion) of the rubber portion 22.

  A plurality of protrusions 46 are arranged discontinuously along the equatorial plane CL. Protruding lugs 48 extending outward from the equator surface CL portion of the tread surface 44 to the vicinity of the maximum width are alternately arranged on the tread surface portion 44 at substantially equal intervals in the circumferential direction, and the equatorial surface CL side of the protrusion 46 is respectively It is connected to. For this reason, the protrusions 46 exist corresponding to the number of protrusion-like lugs 48 extending outward from the equatorial plane CL.

  Further, the lug 48 is thick in the vicinity of the equator plane CL, and is formed so as to gradually narrow from the equator plane CL side toward the outside. Further, the center line V of the lug 48 is symmetrical with respect to the center line V, and the left and right ridge lines 48A forming the lug 48 are formed symmetrically with respect to the center line V. Are inclined with respect to the center line V.

  Here, the equatorial plane CL means a line extending in an annular shape along the center of the tread surface portion 44, and the rubber mounting portion 24 has a length exceeding the equatorial plane CL left and right in FIG. The rubber part 22 can be evenly supported by the rubber mounting part 24.

  (Operation) Next, the operation of the rubber wheel 10 of this embodiment will be described. The rubber part 22 and the disk part 20 of the rubber wheel 10 that is running on the field are submerged in the mud due to the weight of the machine body 12, and the mud approaches the disk part 20. Here, when the disk part 20 rotates, friction is generated between the mud and the disk part 20, but the rubber thin film part 40 separates the disk part 20 and the mud, and the friction between the disk part 20 and the mud is reduced. To prevent. Thereby, rust does not generate | occur | produce in the disc part 20, an external appearance is not impaired, and high durability can also be maintained.

  Further, if the thickness t of the rubber thin film portion 40 is set to t <0.6 mm, the rubber thin film portion 40 is worn out before the life of the rubber portion 22, so that friction occurs between the disk portion 20 and the mud and rust. Occurs, the appearance of the disk portion 20 is impaired, and the durability may be reduced. Here, if t> 5.0 mm, the rubber thin film portion 40 will not wear out before the life of the rubber, and rust can be sufficiently prevented, but the cost is increased because the amount of rubber used increases. Problem arises. Therefore, the thickness t of the rubber thin film portion 40 is preferably 0.6 mm ≦ t ≦ 5.0 mm.

  As the rubber thin film portion 40 extends inward in the radial direction of the disk, even if the rubber portion 22 and the disk portion 20 sink into the mud during traveling in the field, the mud exceeds the rubber thin film portion 40 and damages the disk portion 20. It is difficult to apply and prevents paint peeling. Thereby, generation | occurrence | production of the rust of the disc part 20 is further prevented. Further, since mud is difficult to cross the boundary portion 26A between the disk portion 20 and the rubber thin film portion 40, the load applied to the inner peripheral side end in the disk radial direction of the rubber thin film portion 40 when mud flows down from the side surface of the disk portion is suppressed. This prevents the rubber thin film portion 40 from being peeled off.

  Further, when the rubber thin film portion 40 is extended from the airframe assembly portion 34 to the inner side in the disk radial direction, the rubber thin film portion 40 enters between the airframe 12 and the airframe assembly portion 34 and the assembly of the disk portion 20 is unstable. There is a risk of being in a bad state. Therefore, it is preferable that the inner peripheral side end of the rubber thin film portion 40 in the disk radial direction extends between the boundary portion 26 and the body assembly portion 34.

  Since the rubber mounting portion 24 includes the annular flat portion 24A extending in the disk radial direction along the equator plane CL of the rubber portion 22, the rubber portion 22 can be supported uniformly.

  Since the rubber part 22 is formed with the inclined surface 38, the mud flows down from the inclined surface 38 and does not easily accumulate on the boundary part 26 even when the rubber part 22 sinks and travels in the field.

  The disk portion 20 has a disk shape and can be swirled by pressing mud, so that mud does not rise.

  Further, since the third refracting portion 32 is formed in the disc portion 20, the strength of the disc portion 20 can be increased, and the thickness of the material can be reduced, so that the weight can be reduced and the cost is economical.

  Note that the second refracting portion 28 provided on the outer peripheral side in the disc radial direction is effective in improving the overall strength of the disc portion 20.

  On the other hand, in the present embodiment, as shown in FIG. 3, protruding lugs 48 extending outward from the equatorial plane CL portion of the tread portion 44 to near the maximum width are alternately left and right at substantially equal intervals in the circumferential direction. Is arranged. Accordingly, since the protruding lugs 48 reliably capture the road surface even in the field, the rubber-equipped wheel 10 of the present embodiment enables more reliable traveling in the muddy ground.

  In the present embodiment, the center line V of the lug 48 is perpendicular to the equator plane CL, and the cross section shown in any lug 48 cut parallel to the equator plane CL is relative to the center line V. The left and right ridge lines 48A of the lug 48 are formed symmetrically. For this reason, the direction of the rubber-equipped wheel 10 is lost, and as a result of attaching the rubber-equipped wheel 10 to either the left or right side of the aircraft, the same shape can be obtained. It became possible to reduce parts.

  Further, the equatorial plane CL of the lug 48 is connected to the protrusion 46 extending along the circumferential direction of the tread surface 44, and the ridge 48 </ b> A forming the lug 48 is inclined with respect to the center line V of the lug 48. A lug 48 is formed so as to gradually narrow toward the outside from the CL portion. Therefore, the presence of the protrusions 46 not only prevents the lateral flow at the time of turning of the airframe and improves the straightness of the rubber wheel 10, but also the distance between the lugs 48 on the center side of the tread surface 44 during traveling. The mud that has entered can easily flow out of the center of the equatorial plane CL due to the inclination of the lug 48, and mud clogging can be reduced to improve running performance.

  [Test example] In order to confirm the effect of the present invention, first, scraping was performed, and then two 6-planting rice transplanters were prepared, and the front wheel of one rice transplanter was equipped with the rubber of Example 1 and Conventional Example 1. The rice paddies were planted in the opposite direction of the paddy field with the combination of mounting the wheels and mounting the rubber wheels of Example 2 and Conventional Example 2 on the front wheel of another rice transplanter. At this time, the visual check of the worn state of the rim coating and the area where rust was generated were measured, and the results are shown in Table 1. The worn state of the rim coating was visually checked for the state of the rim coating peeling, and was indicated by the evaluation that there was abrasion when the coating was peeled off, and no abrasion when the coating was not peeled off. The area of the rim where rust was generated was the total area of rust generated on the rim. It is assumed that the rubber wheels for the test examples running on the paddy field are evenly loaded. The rubber wheel used in this test is described below.

Example: Rubberized wheel according to Embodiment 1 of the present invention (see FIG. 1)
Conventional example 1: Disc type rim rubber wheel described in the prior art (see FIG. 4)
Conventional example 2: Spoke type rim rubber wheel described in the prior art (see FIG. 5)

  In the number of parts, the rubber part is counted as one point, and the number of parts in the conventional examples 1 and 2 includes an oil seal ring and a flat washer.

  From the results shown in Table 1, the rubber-equipped wheels of the examples are less likely to wear the rim (disk) part than the conventional rubber-equipped wheels of Examples 1 and 2, and rust is less likely to occur. Therefore, it can be seen that the rubber-equipped wheel of the present invention is superior to the conventional rubber-equipped wheels of Examples 1 and 2 both in terms of paint abrasion and prevention of rusting.

(A) is a front view of the rubber wheel according to the first embodiment of the present invention. (B) is a BB line sectional view of Drawing 1 (A). (A) is a front view of the disk applied to the rubber wheel according to the first embodiment of the present invention. (B) is a BB line sectional view of Drawing 2 (A). It is a top view which shows the tread pattern of the wheel with rubber | gum which concerns on the 1st Embodiment of this invention. (A) is a front view showing a wheel with rubber of a conventional disk type rim. (B) is a BB line sectional view of Drawing 4 (A). (A) is a front view of a rubber-equipped wheel of a conventional spoke-type rim. (B) is a BB line sectional view of Drawing 5 (A).

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Wheel with rubber 20 Disk part 22 Rubber part 24 Rubber mounting part 26 Boundary part 34 Machine assembly part 38 Inclined surface (rubber part)
40 Rubber thin film part CL Equatorial plane

Claims (4)

A disk-shaped disk portion having a rubber mounting portion on the outer diameter side and a body assembly portion on the inner diameter side body;
An annular rubber part integrally formed by vulcanization on the rubber mounting part, and a rubber wheel,
At least the machine body side of the machine body side and the machine body side of the disk part, a rubber thin film part extending inward in the disk radial direction from a boundary part between the rubber part and the disk part is provided by vulcanization bonding,
A rubber-equipped wheel satisfying 0.6 mm ≦ t ≦ 5.0 mm, where t is the thickness of the rubber thin film portion.   The rubber-equipped wheel according to claim 1, wherein the rubber thin film portion extends between the boundary portion and the airframe assembly portion.   3. The rubber part according to claim 1, wherein when the rubber part is viewed in a cross section along the disk rotation axis direction, the rubber part is wider from the boundary part toward the outer side in the disk radial direction. The rubber wheel described.   The machine assembly part is formed in a planar shape perpendicular to the disk rotation axis, and is located on the machine side with respect to the disk rotation axis direction outermost part of the disk part on the counter-machine side. The rubber wheel according to any one of claims 1 to 3.

Images