JP3961490B2 - Agricultural wheels - Google Patents

Description

  The present invention relates to agricultural wheels.

  As an agricultural wheel to be mounted on an agricultural machine such as a rice transplanter, it has a wheel part for mounting on a body axle, and an elastic ring body that is provided in an annular shape so as to surround the outer side in the radial direction of the wheel part. Are disc-shaped discs (see, for example, Patent Document 1 to Patent Document 3). The elastic ring body is formed by providing a tire portion made of an elastic material along the outer peripheral portion based on a ring body core portion formed in accordance with an annular shape of the elastic ring body. Part) and the outer peripheral part of the foil part are overlapped in the axial direction of the fuselage axle, and a bolt is inserted so as to penetrate these overlapping parts, and this bolt protrudes The foil part and the elastic ring body were joined by screwing the nut into the part.

That is, the ground load generated when this agricultural wheel is mounted on the body axle is a shear perpendicular to the axial direction (that is, the axial direction of the body axle) with respect to the bolt used for coupling the wheel portion and the elastic wheel. It acts as a force.
JP 2001-30701 A JP 2002-316503 A JP 2003-170701 A

As described above, in the conventional agricultural wheel, the grounding load acts as a shearing force perpendicular to the axial direction with respect to the bolt used for coupling the wheel portion and the elastic ring body. When the grounding load increases due to improvements such as increasing the weight, for example, by increasing the number of bolts used or changing the bolts to thicker ones, the foil part and the elastic ring body can be connected. Strength must also be increased.

Therefore, along with this, part of the agricultural wheels also needed to be improved, leading to high costs. In addition, there is a problem that the appearance of the agricultural wheels when viewed from the side is deteriorated along with an increase in the number of bolts used and an increase in size.
The present invention has been made in view of the above circumstances, and it is possible to increase the bonding strength between the wheel portion and the elastic ring body, and in some cases, can cope with an increase in the grounding load. An object of the present invention is to provide an agricultural wheel that can prevent the formation of an agricultural machinery.

  Another object of the present invention is to provide an agricultural wheel that can prevent deterioration in appearance even when the coupling strength between the foil portion and the elastic ring is increased.

In order to achieve the above object, the present invention has taken the following measures.
That is, the agricultural wheel 1 according to the present invention has a disk-shaped foil part 2 for mounting on a body axle, and an elastic ring body 3 surrounding the outer side in the radial direction of the wheel part 2 and provided in an annular shape. ,
The elastic ring body 3 is provided with a tire part 11 made of an elastic material along the outer peripheral part based on a ring body core part 10 formed in accordance with its annular shape.
The wheel body core portion 10 has an embedded portion 12 embedded in the tire portion 11, and extends from the embedded portion 12 inward in the radial direction of the wheel and overlaps with the outer peripheral side of the wheel portion 2 in the axial direction of the body axle. An annular ring that includes a flange portion 13 and protrudes from the inner peripheral side end portion of the inner flange portion 13 in parallel to the axial direction of the body axle and opposite to the wheel portion 2 arrangement side. A shaped coupling piece 16 is provided,
A wheel radial direction of the coupling piece 16 on the side of the wheel body core 10 that projects from the wheel section 2 in parallel to the axial direction of the body axle and in the same direction as the coupling piece 16 of the wheel body core 10. An annular coupling piece 6 that is in surface contact with the entire inner surface is provided,
A coupling shaft provided along the radial direction of the body axle in a state where the inner surface in the wheel radial direction of the coupling piece 16 in the wheel body core portion 10 and the outer surface in the wheel radial direction of the coupling piece 6 in the wheel portion 2 are in surface contact with each other. 18, both coupling pieces 6 and 16 can be coupled.

Or, it has a wheel part 2 for mounting on the body axle, and an elastic ring body 3 that surrounds the outer side in the radial direction of the wheel part 2 and is provided in an annular shape,
The elastic ring body 3 is provided with a tire part 11 made of an elastic material along the outer peripheral part based on a ring body core part 10 formed in accordance with its annular shape.
The wheel body core portion 10 has an embedded portion 12 embedded in the tire portion 11, and extends from the embedded portion 12 inward in the radial direction of the wheel and overlaps with the outer peripheral side of the wheel portion 2 in the axial direction of the body axle. An annular ring that includes a flange portion 13 and protrudes from the inner peripheral side end portion of the inner flange portion 13 in parallel to the axial direction of the body axle and opposite to the wheel portion 2 arrangement side. A shaped coupling piece 16 is provided,
A wheel radial direction of the coupling piece 16 on the side of the wheel body core 10 that projects from the wheel section 2 in parallel to the axial direction of the body axle and in the same direction as the coupling piece 16 of the wheel body core 10. There are provided coupling pieces 6 distributed in a plurality of locations on the inner side and in the circumferential direction around the body axle,
A coupling shaft 18 provided along the radial direction of the body axle in a state where the inner surface in the wheel radial direction of the coupling piece 16 in the ring body core portion 10 and the outer surface in the wheel radial direction of the coupling piece 6 in the wheel portion 2 are in surface contact with each other. Thus, both the coupling pieces 6 and 16 can be coupled.

As described above, the connecting portions of the wheel portion 2 and the elastic ring body 3 (the ring core portion 10) are in surface contact with each other with the connecting pieces 6 and 16 provided in a state parallel to the axial direction of the body axle. In the agricultural wheel 1 according to the present invention, most of the ground load is supported by the surface contact portion between the coupling pieces 6 and 16. That is, the coupling shaft 18 used for coupling the coupling pieces 6 and 16 is directly loaded by a ground load (corresponding to “shearing force perpendicular to the axial direction” that has been applied to the bolt in the past). ) Has little effect.

For this reason, the coupling strength between the wheel portion 2 and the elastic ring body 3 is strong and stable, and the ground load is increased by making improvements such as increasing the vehicle weight in agricultural machinery. Even in some cases, it may be unnecessary to increase the number of coupling shafts 18 to be used or increase the size. Therefore, cost increases can be prevented.
Moreover, in the wheel part 2 and the elastic ring body 3, if these connection pieces 6 and 16 are made to protrude to the back side of the wheel (the side facing the agricultural machine), both the connection pieces together with these connection pieces 6 and 16 will be described. The connecting shaft 18 that connects the pieces 6 and 16 becomes invisible even when the agricultural wheel 1 is viewed from the side. Therefore, it does not look bad.

In addition, when both the connecting piece 16 of the ring body core portion 10 and the connecting piece 6 of the foil portion 2 are formed in an annular shape, the connecting pieces 6 and 16 are in a fitting relationship due to the mutual annular shapes. It becomes. Therefore, the bond strength between the two is further enhanced and no backlash occurs.
The outer peripheral edge portion of the E-yl portion 2 is preferably formed reaches the inner periphery or the vicinity thereof of the elastic ring member 3.

  The ring body core portion 10 of the elastic ring body 3 has a structure having an embedded portion 12 formed of a pipe material in the tire portion 11, or an embedded portion 12 in which an outer peripheral portion of a donut-shaped plate material is bent into a rib shape. It can be set as the structure which has.

  In the agricultural wheel according to the present invention, it is possible to increase the bonding strength between the foil portion and the elastic ring body, and in some cases, it is possible to cope with an increase in grounding load, thereby preventing an increase in cost. . Further, the appearance can be improved, and the appearance can be prevented from deteriorating even when the bonding strength between the foil portion and the elastic ring body is increased.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to 4 show a first embodiment of an agricultural wheel 1 according to the present invention. The agricultural wheel 1 according to the first embodiment has a foil portion 2 and an elastic ring body 3 provided around the wheel portion 2.
The wheel portion 2 is a portion for mounting the agricultural wheel 1 to a body axle (not shown) of an agricultural machine such as a rice transplanter, and a bolt for connecting to the body axle is inserted into the center portion thereof. A mounting hole 5 is provided. In the first embodiment, the foil part 2 is a disk-shaped disk. The outer peripheral edge portion of the foil portion 2 is formed to reach the vicinity of the inner peripheral edge portion of the elastic ring body 3.

  The foil portion 2 is provided with a coupling piece 6 (hereinafter referred to as “foil-side coupling piece 6”). The foil-side coupling piece 6 protrudes in the direction parallel to the axial direction of the airframe axle at the outer peripheral portion of the foil portion 2. If there is a distinction between the front and back of the foil part 2, the foil side coupling piece 6 is projected so as to be directed to the back side (the side facing the agricultural machine) of the foil part 2. In other words, the protruding side of the foil side coupling piece 6 is the back side for the foil part 2.

The foil side coupling piece 6 is formed in an annular shape concentrically with the foil part 2 along the outer periphery of the disk of the foil part 2. Further, the foil side coupling piece 6 is positioned so as to enter a predetermined dimension (H dimension shown in FIG. 3) inward in the radial direction from the outer peripheral edge of the foil part 2. In the first embodiment, the foil side coupling piece 6 is formed by attaching a ring member formed of a material different from the foil part 2 to the foil part 2 by welding.

  The elastic ring body 3 is formed in an annular shape so as to surround the outer side in the radial direction of the foil portion 2. The elastic ring body 3 is provided with a tire part 11 along the outer peripheral part of the ring body core part 10 based on a ring body core part 10 formed in accordance with the annular shape. The tire portion 11 is formed of an elastic material such as rubber, and is attached to the annular core portion 10 in a solid state by baking, for example.

  The ring body core portion 10 extends inward in the radial direction as the elastic ring body 3 through the embedded portion 12 provided in the center of the tire portion 11 and the inner peripheral side of the tire portion 11 from the embedded portion 12. And an inner flange portion 13 to be taken out. In the first embodiment, the embedded portion 12 is formed from a pipe material (round pipe), and the embedded portion 12 and the inner flange portion 13 are joined together by welding.

The ring body core portion 10 is provided with a coupling piece 16 (hereinafter referred to as a “ring body side coupling piece 16”). The ring-body-side coupling piece 16 protrudes in a direction parallel to the axial direction of the airframe axle at the inner peripheral portion of the inner flange portion 13. In the first embodiment, the ring-body-side coupling piece 16 is formed integrally with the inner flange portion 13 by bending the inner peripheral portion of the inner flange portion 13.
Similarly to the case of the foil-side coupling piece 6 in the foil part 2, if there is a distinction between the front and back as the elastic ring body 3, the ring-body side coupling piece 16 is connected to the back side of the elastic ring body 3 (to agricultural machinery). It protrudes toward the facing side). In other words, the projecting side of the ring-body-side coupling piece 16 is the back surface side for the elastic ring body 3.

The ring-body-side coupling piece 16 is provided so as to be in surface contact with the wheel-side coupling piece 6 provided on the foil portion 2 on the outer peripheral surface side. In accordance with the fact that the wheel side coupling piece 6 is formed in an annular shape, the ring body side coupling piece 16 is also formed in an annular shape. In other words, the relationship between the inner diameter D of the ring-body-side coupling piece 16 and the outer diameter d of the wheel-side coupling piece 6 is D ≧ d within a range that is approximately the same, and the wheel-side coupling piece 16 is included in the wheel-body-side coupling piece 16. The piece 6 can be fitted, and by this fitting, the inner circumferential surface of the ring-body-side coupling piece 16 and the outer circumferential surface of the foil-side coupling piece 6 are brought into surface contact with the entire circumference.

  The wheel side coupling piece 6 of the wheel portion 2 and the ring body side coupling piece 16 of the elastic ring body 3 are provided with through holes at equal positions (four locations in the illustrated example) along the circumferential direction thereof. These through holes can be matched with each other. Then, the coupling shaft 18 is inserted into the matched through hole so that both are coupled. The coupling shaft 18 is, for example, a bolt. In this case, a nut 19 is screwed onto the bolt end side that has penetrated the through hole. Note that either one of the through hole provided in the wheel side coupling piece 6 or the through hole provided in the ring body side coupling piece 16 may be a female screw hole, and the coupling shaft 18 may be directly screwed thereto.

It goes without saying that the coupling shaft 18 provided in this way is in a state where its axis is aligned with the radial direction of the vehicle axle.
A lug pattern is appropriately provided on the outer peripheral surface of the tire portion 11. In the first embodiment, trapezoidal lugs 20 are provided at predetermined intervals along the circumferential direction of the tire portion 11, and every other trapezoidal lugs 20 are arranged in the width direction of the elastic ring body 3. A triangular lug 22 that is extended to both sides and formed with a triangular recess 21 on the side surface is shown.

Further, the inner peripheral surface side of the tire portion 11 protrudes into a cross-sectional mountain shape, and the center portion in the width direction has a shape that becomes the most top portion 11a of the protrusion, and the sludge 11b on both sides of the top portion 11a peels off the attached mud. It is designed to enhance sex. The slope 11b may be a concave curve, a convex curve, or a straight curve.
In the wheel part 2 described above, the outer peripheral edge part is extended from the position of the foil-side coupling piece 6 to a position reaching the top part 11 a on the inner peripheral side of the tire part 11. This extension amount corresponds to the H dimension described above.

  The agricultural wheel 1 according to the present invention having such a configuration brings the inner surface of the foil side coupling piece 6 in the foil portion 2 and the outer surface of the annular body side coupling piece 16 in the elastic ring body 3 into surface contact with each other, In a state where the two coupling pieces 6 and 16 are coupled to each other by the coupling shaft 18, the two coupling pieces 6 and 16 and the coupling shaft 18 face the rear side of the wheel (the side facing the agricultural machine). It mounts and it fixes to the body axle of an agricultural machine with the mounting hole 5 of the foil part 2. FIG. In this mounted and fixed state, the wheel side coupling piece 6, the wheel body side coupling piece 16 and the coupling shaft 18 are not visible even when the agricultural wheel 1 is viewed from the side. Therefore, the agricultural wheel 1 does not look bad.

  Moreover, since most of the ground load acting on the agricultural wheel 1 is supported by the portion where the wheel-side coupling piece 6 and the wheel-body-side coupling piece 16 are in surface contact (overlapping) with each other, it is elastic with the foil portion 2. The coupling strength with the ring body 3 is strong and stable. Therefore, for example, even when the ground load is increased due to an improvement that increases the vehicle weight in an agricultural machine, depending on the case, the number of used connecting shafts 18 may be increased. It is possible to eliminate the need for an increase in size and prevent an increase in cost.

FIG. 5 shows a second embodiment of the agricultural wheel 1 according to the present invention. In the agricultural wheel 1 according to the second embodiment, the most different point from the first embodiment described above is that a concentric bent portion 25 is provided in the wheel portion 2 on the radially inner side of the wheel side coupling piece 6. It is in. Such a bent portion 25 serves to reinforce the foil portion 2 and also contributes to an improvement in appearance.
FIG. 6 shows a third embodiment of the agricultural wheel 1 according to the present invention. In the agricultural wheel 1 according to the third embodiment, a concentric bent portion 26 is provided on the outer side in the radial direction of the foil side coupling piece 6 in the wheel portion 2, and the elastic ring body 3 (the ring body core portion) is arranged accordingly. The inner flange portion 13 of 10) is also provided with a bent portion 27 that can be overlapped with the bent portion 26 and can be polymerized.

  FIG. 7 shows a fourth embodiment of the agricultural wheel 1 according to the present invention. The agricultural wheel 1 according to the fourth embodiment is substantially the same as the agricultural wheel 1 according to the third embodiment described above (see FIG. 6), but only in the inner ring portion 10 of the elastic body 3. 13 is different in that the embedded portion 12 is formed by bending the outer peripheral portion of the donut-shaped plate material forming the shape 13 into a rib shape (that is, not the pipe material).

FIG. 8 shows the agricultural wheel 1 according to the disclosed example . In the agricultural wheel 1 shown in FIG. 8 , the wheel-side coupling piece 6 is provided by bending the outer peripheral edge of the foil part 2. Therefore, the outer peripheral edge portion of the wheel portion 2 and the inner peripheral edge portion of the elastic ring body 3 (the inner flange portion 13 of the ring body core portion 10) are in abutment shape. In the ring body core portion 10 of the elastic ring body 3, the embedded portion 12 is formed of a pipe material.

FIG. 9 shows an agricultural wheel 1 according to the disclosed example . The agricultural wheel 1 shown in FIG. 9 is substantially the same as the agricultural wheel 1 shown in FIG. 8 described above, but the only donut in which the inner flange portion 13 is formed in the ring body core portion 10 of the elastic ring body 3. It is different in that the embedded portion 12 is formed by bending the outer peripheral portion of the plate material into a rib shape (that is, not a pipe material).
FIG. 10 shows a fifth embodiment of the agricultural wheel 1 according to the present invention. In the agricultural wheel 1 of the fifth embodiment, the foil side coupling pieces 6 in the wheel portion 2 are dispersedly arranged at a plurality of locations (four locations in the illustrated example) in the circumferential direction around the body axle. Thereby, weight reduction as the agricultural wheel 1 is achieved.

In addition, the ring body side coupling pieces 16 of the elastic ring body 3 may be distributed in the same number and in the same arrangement so as to match the wheel side coupling pieces 6 of the wheel portion 2.
By the way, this invention is not limited to each above-mentioned embodiment, It can change suitably according to embodiment.
For example, the foil part 2 may be a spoke type or the like in addition to the disk type shown in the figure. Moreover, in the elastic ring body 3, it is also possible to make the tire part 11 into a hollow structure and to make it a pneumatic tire.

It is the side view which showed 1st Embodiment of the agricultural wheel which concerns on this invention. It is the sectional view on the AA line of FIG. FIG. 3 is an exploded view of FIG. 2. It is the B section enlarged view of FIG. It is a sectional side view (figure drawn with the same viewing angle as FIG. 2) which showed 2nd Embodiment of the agricultural wheel which concerns on this invention. It is the sectional side view (figure drawn with the same viewing angle as FIG. 4) which showed 3rd Embodiment of the agricultural wheel which concerns on this invention. It is the sectional side view (figure drawn with the same viewing angle as FIG. 4) which showed 4th Embodiment of the agricultural wheel which concerns on this invention. It is the sectional side view (figure drawn with the same viewing angle as FIG. 4) which showed the example of disclosure of the agricultural wheel which concerns on this invention. It is the sectional side view (figure drawn with the same viewing angle as FIG. 4) which showed the example of disclosure of the agricultural wheel which concerns on this invention. It is the side view which showed 5th Embodiment of the agricultural wheel which concerns on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Agricultural wheel 2 Foil part 3 Elastic ring body 6 Coupling piece (foil side coupling piece)
DESCRIPTION OF SYMBOLS 10 Ring body core part 11 Tire part 12 Buried part 16 Coupling piece (ring body side coupling piece)
18 connecting shaft

Claims (5)

A disc-shaped foil portion (2) for mounting on the body axle, and an elastic ring body (3) provided in an annular shape so as to surround a radially outer side of the foil portion (2);
The elastic ring body (3) is provided with a tire part (11) made of an elastic material along the outer peripheral part based on a ring body core part (10) formed in accordance with the annular shape of the elastic ring body (3). ,
The ring body core portion (10) has an embedded portion (12) embedded in the tire portion (11), and extends from the embedded portion (12) to the inner side in the wheel radial direction and on the outer peripheral side of the wheel portion (2). And an inner flange portion (13) that overlaps in the axial direction of the fuselage axle. The annular core portion (10) is parallel to the axial direction of the fuselage axle from the inner peripheral end of the inner flange portion (13). And an annular coupling piece (16) projecting to the side opposite to the wheel portion (2) arrangement side is provided,
The wheel part (2) projects from the wheel part (2) in parallel with the axial direction of the body axle and in the same direction as the connecting piece (16) of the wheel body core part (10). ) Side coupling piece (16) is provided with a ring-shaped coupling piece (6) that is in surface contact with the entire circumference in the wheel radial direction,
The diameter of the body axle in a state where the inner surface in the wheel radial direction of the coupling piece (16) in the ring body core portion (10) and the outer surface in the wheel radial direction of the coupling piece (6) in the wheel portion (2) are in surface contact with each other. Agricultural wheel characterized in that both coupling pieces (6, 16) can be coupled by a coupling shaft (18) provided along the direction. A wheel part (2) for mounting on the body axle, and an elastic ring body (3) provided in an annular shape surrounding the outside of the wheel part (2) in the radial direction;
The elastic ring body (3) is provided with a tire part (11) made of an elastic material along the outer peripheral part based on a ring body core part (10) formed in accordance with the annular shape of the elastic ring body (3). ,
The ring body core portion (10) has an embedded portion (12) embedded in the tire portion (11), and extends from the embedded portion (12) to the inner side in the wheel radial direction and on the outer peripheral side of the wheel portion (2). And an inner flange portion (13) that overlaps in the axial direction of the fuselage axle. The annular core portion (10) is parallel to the axial direction of the fuselage axle from the inner peripheral end of the inner flange portion (13). And an annular coupling piece (16) projecting to the side opposite to the wheel portion (2) arrangement side is provided,
The wheel part (2) projects from the wheel part (2) in parallel with the axial direction of the body axle and in the same direction as the connecting piece (16) of the wheel body core part (10). ) Side coupling pieces (16) on the inner side in the radial direction of the wheel and the coupling pieces (6) dispersedly arranged at a plurality of locations in the circumferential direction around the body axle.
Is provided,
The radial direction of the body axle in a state where the inner surface in the wheel radial direction of the coupling piece (16) in the wheel body core portion (10) and the outer surface in the wheel radial direction of the coupling piece (6) in the wheel portion (2) are in surface contact with each other. Agricultural wheels characterized in that both coupling pieces (6, 16) can be coupled by a coupling shaft (18) provided along the axis . The wheel portion the outer peripheral edge portion according to claim 1 or 2, the inner periphery or said Tei Rukoto formed reaches the vicinity of the tire part of the elastic wheel body (3) (11) (2) Agricultural wheels. The ring body core portion (10) of the elastic ring body (3) has an embedded portion (12) formed of a pipe material in the tire portion (11). agricultural wheels according to any one of claims 3. The ring body core portion (10) of the elastic ring body (3) has an embedded portion (12) in which the outer peripheral portion of the donut-shaped plate material is bent into a rib shape with respect to the tire portion (11). agricultural wheels according to any one of claims 1 to 3, characterized in that there.

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