JP4364346B2 - Wheel - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to wheels used for rice transplanters, lotus root harvesters, flooded direct sowing machines, management machines, and the like.
[0002]
[Prior art]
Conventionally, as shown in FIGS. 4 to 7, as an agricultural wheel 1 used for a rice transplanter, a lotus root harvester, or the like, for example, there is one in which a solid type tire 3 is fixed to a rim 2.
The wheel 1 includes a cylindrical boss 4 positioned at the radial center of the wheel 1, spokes 5 including a plurality of round pipes or the like protruding outward from the boss 4 in the radial direction of the wheel, and the spokes. An annular rim 2 made of a round pipe material fixed to the outer end portion in the wheel radial direction 5 and a rubber-like elastic body fixed to the rim 2 so as to cover the entire circumference of the rim 2 This is a rubber-baked type wheel mainly composed of the formed tire 3.
[0003]
The boss 4 has an axis in a direction perpendicular to the surface in the wheel radial direction (wheel axis direction E), and is fitted and fixed to an axle of a rice transplanter or the like, and the wheel 1 rotates together with the axle. A rice transplanter etc. will run.
The tire 3 includes an annular tire body 6 that is fixed to the rim 2 so as to cover the rim 2 over the entire circumference. The large ribs 7 and the small ribs 8 for securing the traction and the lugs 9 for securing the traction are formed so as to protrude integrally from the tire body 6 at intervals in the wheel circumferential direction G.
[0004]
The large ribs 7 and the small ribs 8 are provided in the center portion of the tire body 6 in the wheel axial direction E, and are provided alternately in the wheel circumferential direction G.
The lug 9 is located on the side of each large rib 7 so as to protrude integrally from the large rib 7 and the tire body 6, and is located on the right side of the large rib 7 (one side in the wheel axis direction E). The lugs 9 and the lugs 9 located on the left side of the large rib 9 (the wheel axial direction E other side) are provided so as to be alternately arranged in the wheel circumferential direction G (in a staggered manner).
Further, the lug 9 has a substantially triangular shape in a side view, and the wheel axial direction end surface 9a is flush with the wheel axial direction E end of the tire body 6, and the end surface 9a is lightened. And the recessed part 10 aiming at the improvement of cushion performance is formed.
[0005]
[Problems to be solved by the invention]
The conventional wheel 1 is provided on the end surface 9a of the lug 9 below the soil surface when the wheel 1 is mounted on a rice transplanter or the like and is operated in a paddy field or the like (when traveling on a field). Since the mud enters the recessed portion 10, the mud is lifted by the recessed portion 10 when the lug 9 comes out of the soil surface, and the horsepower loss is increased. There is a problem that labor is required to take out the clogged mud (especially, it is difficult to take out when the mud clogged in the recess 10 is dried).
[0006]
Further, in the conventional wheel 1, when traveling on the field, the mud clogged up between the adjacent lugs 9 in the wheel circumferential direction G is lifted, so that, similarly to the above, the horsepower loss is increased and the operation is completed. When washing the wheel 1 later, there is also a problem that it takes labor to take out the mud clogged between the lugs 9.
Further, in the conventional wheel 1, the surface on the anti-grounding side (inner peripheral side) of the tire body 6 is an inclined surface F that shifts outward in the wheel radial direction D from the center in the wheel axial direction E toward the outside. The angle α formed by the slope F and the wheel axis direction E (this is referred to as an inclination angle) is 40 ° or less.
[0007]
When the inclination angle α is 40 ° or less, there is also a problem that horsepower loss becomes large because mud is lifted by the slope F during traveling on the field.
Accordingly, an object of the present invention is to reduce mud lifted by a tire and reduce mud adhesion and mud clogging on the tire.
[0008]
[Means for Solving the Problems]
Technical means taken for the present invention to achieve the object, provided with a tire formed from a rubber-like elastic body, the tire and the tire body which is secured to an annular rim, the outer peripheral side of the tire body The tire body includes an inner peripheral side portion in which a rim is embedded, and an outer peripheral side portion located on the outer side in the wheel radial direction than the rim. In wheels equipped with
The outer peripheral part of the tire body is overhanging outward in the wheel axis direction from the inner peripheral part,
In order to separate the mud clogged between adjacent lugs in the circumferential direction of the wheel due to elastic deformation of the side portion of the outer peripheral side portion of the tire body from the outer side of the rim of the rim in the radial direction of the wheel. Of the inner peripheral side portion of the tire body from the inner peripheral side surface of the outer peripheral side portion of the tire main body so that a space is formed on the inner side from the inner peripheral side surface of the outer peripheral side portion of the tire main body. A recess is formed on the side surface, which is recessed toward the inside of the tire body.
[0009]
Moreover, a recessed part may be formed in the wheel axial direction end surface of a lug, and the wheel radial direction inner side of this recessed part may be formed in the open shape toward the wheel radial direction inner side .
In addition to the above configuration, it is preferable that the end surface of the lug in the wheel axis direction protrudes outward in the wheel axis direction from the end portion of the tire body in the wheel axis direction.
Further, in addition to the previous SL configuration, the tire body side, between the outer portion and the inner peripheral side portion, it is preferable formed in a curved shape that is recessed toward the tire body inner side.
Furthermore, when the wheel axial direction width of the outer peripheral side portion of the tire body is B and the wheel axial direction width of the inner peripheral side portion of the tire main body is C, C / B ≦ 0.7 is formed. It is good to have.
[0010]
Also, the surface of the tire body on the anti-grounding side is a slope that moves outward in the wheel radial direction as it goes outward from the center in the wheel axis direction, and the angle formed by this slope and the wheel axis direction Is preferably 45 ° or more.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below.
FIG. 1 shows a cross section of a rim 2 and a tire 3 of a wheel 1 in which a solid type tire 3 is fixed to a rim 2.
The wheel 1 in the present embodiment is also located at the center in the radial direction of the wheel 1 and attached to the axle of a rice transplanter or the like, and the wheel 1 protrudes outward in the wheel radial direction D, similarly to the conventional wheel. A plurality of spokes, an annular rim 2 fixed to the outer ends of the spokes in the radial direction of the wheel, rubber fixed to the rim 2 so as to cover the rim 2 over the entire circumference, etc. This is a rubber-baked wheel mainly composed of a tire 3 formed of an elastic body.
[0012]
Further, the tire 3 includes an annular tire body 6 fixed to the rim 2 so as to cover the rim 2 over the entire circumference, and on the outer peripheral side (grounding surface side) of the tire body 6, Large ribs 7 and small ribs 8 that ensure straightness, and lugs 9 that secure traction are formed so as to protrude integrally from the tire body 6 at intervals in the wheel circumferential direction G. The arrangement of the large ribs 7, the small ribs 8 and the lugs 9 is substantially the same as the conventional one.
The tire body 6 is broadly divided into an inner circumferential side portion 6A located on the wheel radial direction inner side H side and an outer circumferential side portion 6B located on the wheel radial direction outer side D side. Is embedded, and the outer peripheral side portion 6B is located on the outer side D in the wheel radial direction from the rim 2.
[0013]
The outer peripheral side portion 6B of the tire main body 6 has a protruding shape outward in the wheel axis direction E from the inner peripheral side portion 6A.
Further, an inner H side portion in the wheel radial direction (between the outer peripheral side portion 6B and the inner peripheral side portion 6A) of the side surface of the tire main body 6 (the wheel axial direction E end surface) is a surface on the inner peripheral side of the outer peripheral side portion 6B. 13 over the side surface 14 of the inner peripheral portion 6A from (Earl shape having a external to the center of the tire body 6) curved in the recessed toward the inner side of the tire body 6 is formed.
Therefore, compared with the tire main body of the conventional wheel, the rigidity of the overhanging portion (J portion in FIG. 2) of the outer peripheral side portion 6B of the tire main body 6 in this embodiment on the end side in the wheel axial direction E is reduced. The elastic deformation of the portion in the direction indicated by the arrow K in FIG. 2 is facilitated, and the mud 11 clogged between the adjacent lugs 9 in the wheel circumferential direction G is removed from the lug 9 by the movement in the direction indicated by the arrow K when the overhanging portion travels. It can be effectively peeled (separated), and impact and vibration acting on the tire body 6 from the road surface or the like during traveling are absorbed and mitigated by the projecting portion of the outer peripheral side portion 6B, thereby improving riding comfort. Can do.
[0014]
In other words, in other words, it can be said that a recess 17 that is recessed in a curved shape toward the inner side of the tire body 6 is formed on the inner side of the tire body 6 in the wheel radial direction on the side surface. It can be said that there is an effect that the amount of rubber can be reduced and the weight can be reduced.
The tire body 6 has C / B ≦ 0.7 when the wheel axial direction width of the outer peripheral side portion 6B is B and the wheel axial direction width of the inner peripheral side portion 6A is C. Preferably it is formed.
[0015]
In addition, in the thing of FIG.1 and FIG.2, although the hollow 17 of the tire main body 6 side surface is made into the curved shape over the side surface 14 of the inner peripheral part 6A from the inner peripheral side surface 13 of the outer peripheral side part 6B, As shown in FIG. 3, a straight portion 16 may be provided on the inner peripheral surface 13 of the outer peripheral portion 6B and the side surface 14 of the inner peripheral portion 6A.
Further, the wheel axis direction E end surface 9a of the lug 9 protrudes outward in the wheel axis direction E from the wheel axis direction E end part of the tire body 6 (the outer peripheral side portion 6B). The inner radial H side portion of the end surface 9a of the lug 9 in the wheel axial direction E is only the dimension A outside the axial direction E end of the outer peripheral side portion 6B of the tire body 6 in the outer direction E of the wheel axis. Projecting (in other words, the wheel axial direction E end portion of the outer peripheral side portion 6B of the tire body 6 is a wheel having a dimension A more than the wheel radial direction inner side portion of the wheel axial direction E end surface of the lug 9. It is located in the axial direction E).
[0016]
And the wheel radial direction inner side H side of the recessed part 10 formed in the wheel axial direction E end surface of the lug 9 is made open toward the wheel axial direction inner side H, and at the time of work in a paddy field etc. The mud or the like that enters the recess 10 and is lifted is discharged from the open portion 12 of the recess 10.
In addition, the wheel axial direction E end part of the outer peripheral side part 6B of the tire main body 6 and the wheel radial direction inner side H side part of the wheel axial direction E end surface of the lug 9 are made substantially flush. Then, by forming a groove in the wheel radial direction in a portion corresponding to the concave portion 10 on the side surface of the outer peripheral side portion 6B of the tire body 6, the wheel radial direction inner side H of the concave portion 10 is set inward in the wheel axis direction. It can be opened toward H.
[0017]
The surface on the anti-grounding side (inner peripheral side) of the tire body 6 is a slope F that shifts outward in the wheel radial direction as it goes outward from the center in the wheel axial direction E. The slope F and the wheel The inclination angle α formed with the axial direction E is 45 ° or more.
By setting the inclination angle α to 45 ° or more, mud lifted by the inner peripheral surface of the tire body 6 can be reduced.
The present invention is not limited to the wheel 1 having the solid type tire 3 as in the above-described embodiment, and the present invention is configured by detachably attaching a pneumatic tire to the rim. May be used for other wheels.
[0018]
In addition, various configurations of the configuration of the wheel 1 that is not related to the present invention can be changed.
[0019]
【The invention's effect】
According to the present invention, the tire includes a tire formed of a rubber-like elastic body, and the tire is fixed to an annular rim, and provided on the outer peripheral side of the tire main body at an interval in the wheel circumferential direction. The tire body is configured to include a lug, and the tire body includes an inner peripheral side portion in which a rim is embedded, and an outer peripheral side portion positioned on the outer side in the wheel radial direction than the rim.
The outer peripheral part of the tire body is overhanging outward in the wheel axis direction from the inner peripheral part,
In order to separate the mud clogged between adjacent lugs in the circumferential direction of the wheel due to elastic deformation of the side portion of the outer peripheral side portion of the tire body from the outer side of the rim of the rim in the radial direction of the wheel. Of the inner peripheral side portion of the tire body from the inner peripheral side surface of the outer peripheral side portion of the tire main body so that a space is formed on the inner side from the inner peripheral side surface of the outer peripheral side portion of the tire main body. By forming a recess that is recessed toward the inside of the tire body toward the side surface, elastic deformation of the side portion of the outer peripheral side portion of the tire main body becomes relatively easy, and traveling of the side portion of the outer peripheral side portion of the tire main body is facilitated. Due to the movement at the time, mud clogged between adjacent lugs in the circumferential direction of the wheel can be peeled off from the lugs, it is possible to reduce horsepower loss, and it is possible to reduce labor during washing, While driving, tap from the road surface. Impact acting on ya, effectively absorb vibration, it can be relaxed, thereby improving the ride comfort.
[0020]
The recess is formed in the wheel axial direction end surface of the lag, of the recess, by the wheel radially inner side is formed in an open shape toward the wheel radially inward, lifting of mud by the recess In addition, it is possible to reduce soiling and clogging in the recesses, to reduce horsepower loss, and to reduce labor during cleaning.
In addition, by projecting the wheel axial center end face of the lug outwardly of the wheel axial direction from the wheel axial direction end of the tire body, the inner side of the wheel radial direction is open toward the inner side of the wheel radial direction. The recessed portion thus formed can be easily formed.
[0021]
Further, the tire main body side, between the outer peripheral portion and inner peripheral portion, by forming a curved shape that is recessed toward the tire body inner side, the rigidity of the side portion of the outer peripheral portion of the tire body moderate The above-described effect due to the elastic deformation of the side portion can be exhibited.
Further, when the wheel axial direction width of the outer peripheral side portion of the tire main body is B and the wheel axial direction width of the inner peripheral side portion of the tire main body is C, C / B ≦ 0.7 is formed. Thus, the above-described effect due to the elastic deformation of the side portion can be exhibited while appropriately maintaining the rigidity of the side portion of the outer peripheral side portion of the tire body.
[0022]
Also, the surface of the tire body on the anti-grounding side is a slope that moves outward in the wheel radial direction as it goes outward from the center in the wheel axis direction, and the angle formed by this slope and the wheel axis direction By setting the angle to 45 ° or more, it is possible to reduce lifting of mud by the slope, and it is possible to reduce horsepower loss and labor during cleaning.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a wheel tire according to the present invention cut along a radial surface.
FIG. 2 is a cross-sectional view of a wheel tire according to the present invention cut along a radial surface.
FIG. 3 is a cross-sectional view of a wheel tire according to another embodiment of the present invention cut along a radial surface.
FIG. 4 is a side view of a conventional wheel.
FIG. 5 is a developed plan view of the outer peripheral side of a conventional wheel tire.
6 is a cross-sectional view taken along line LL in FIG.
7 is a cross-sectional view taken along line MM in FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Wheel 2 Rim 3 Tire 6 Tire main body 6A Inner peripheral side part 6B Outer peripheral side part 10 Lug B Wheel axial direction width of outer peripheral side part of tire main body C Wheel axial direction width of inner peripheral side part of tire main body E Wheel axis Center direction D Wheel diameter direction outward G Circumferential direction H Wheel axis direction inward F Slope

Claims (6)

A tire (3) formed of a rubber-like elastic body is provided. The tire (3) is fixed to an annular rim (2). A tire body (6) is arranged on the outer peripheral side of the tire body (6). The tire body (6) includes an inner peripheral side portion (6A) in which a rim (2) is embedded, and a rim ( In the wheel provided with the outer peripheral side part (6B) located in the wheel radial direction outward (D) rather than 2),
The outer peripheral side portion (6B) of the tire body (6) is projected outward from the inner peripheral side portion (6A) in the wheel axial direction (E),
In order to separate the mud clogged between the lugs (9) adjacent to each other in the wheel circumferential direction (G) by elastic deformation of the side portion of the outer peripheral side portion (6B) of the tire body (6) from the lugs (9) From the surface (13) on the outer peripheral side (D) side of the wheel radial direction and the inner peripheral side surface (6B) of the tire body (6) from the end on the outer side (D) side of the wheel radial direction of 2). The side surface (6A) of the tire body (6) from the inner circumferential surface (13) of the outer circumferential side portion (6B) of the tire body (6) so that a space is formed on the inner circumferential side ( 14. A wheel characterized in that a depression (17) that is recessed toward the inner side of the tire body (6) is formed over 14) . A recess (10) is formed in the end surface of the lug (9) in the wheel axis direction (E), and the inner side (H) of the recess (10) toward the inner side (H) in the wheel radial direction. The wheel according to claim 1, wherein the wheel is formed in an open shape . Claims wheel axial direction (E) the end face of the lug (9) is characterized in that protrudes wheel axial direction (E) outward from the wheel axis direction (E) the ends of the tire body (6) Item 3. The wheel according to item 1 or 2 . The tire body (6) side, between the outer peripheral side portion and (6B) and an inner peripheral side portion (6A), characterized in that it is formed in a curved shape that is recessed toward the tire body (6) inner side The wheel according to any one of claims 1 to 3. A wheel axis direction (E) the width of the outer peripheral portion of the tire body (6) (6B) and B, and the wheel axis direction (E) the width of the inner circumferential portion of the tire body (6) (6A) and C when wheel according to any one of claims 1 to 4, characterized in that it is formed such that the C / B ≦ 0.7. The surface on the anti-ground side of the tire body (6) is an inclined surface (F) that shifts outward (D) in the radial direction of the wheel as it goes outward from the center of the wheel axis direction (E). and (F), a wheel according to claim 1 in which the angle between the wheel axis direction (E), characterized in that there is a 45 ° or more.

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