JPH08332802A - Wheel for paddy field - Google Patents

Abstract

PURPOSE: To provide a wheel for a paddy field improving the floating action and towing action by vane lugs and improving a turning property. CONSTITUTION: This wheel for a paddy field is provided with an elastic wheel body 5 having a circular rim 4 fixed at the tips of spokes 3 as a core and vane lugs 6, and mud release recesses 11 for reducing the resistance at the time of a turn are formed at the inner periphery section 9 of the elastic wheel body 5 except for the fixing portions 10 of the spokes 3 and the rim 4 between the vane lugs 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rubber-baked wheel for paddy fields, and is used as a traveling device for paddy field working machines such as riding rice transplanters and flooded direct seeders.

[0002]

2. Description of the Related Art An annular rim is fixed to the tips of spokes arranged in a radial pattern, and an elastic ring body is provided with the rim as a core and the whole is covered with an elastic material. Paddy field wheels integrally provided with vane lugs in a radial arrangement are known and are used in riding rice transplanters and the like.

In order to secure large buoyancy and traction in this paddy wheel, it is advantageous to widen the area of the blade lug. However, when the inner diameter portion of the blade lug is projected radially inward from the inner peripheral portion of the elastic ring body, the protruding portion is clogged with mud, and when it is dropped by being carried around, the planting mark (work mark) is disturbed, The seedling may fall.

Therefore, as disclosed in Japanese Laid-Open Patent Publication No. 3-14701, a ridge is provided on the inner peripheral portion of the elastic ring body so that the blade lug (propulsion lug) does not protrude from the ridge. Some have improved propulsion and straight ahead performance.

[0005]

Although the working machine wheel (paddy wheel) disclosed in the above publication has some usefulness, it has a raised portion on the inner peripheral portion of the elastic ring body. When the machine changes direction (when it goes around), it pushes mud on the side of the ridge, which pushes down the planted seedlings and causes a large turning resistance (turning resistance), resulting in a waste of horsepower.

Although FIG. 4 of the above publication discloses a technique in which the inner end shape of the raised portion is formed in a corrugated shape, the corrugated concave portion is also formed in the fixed portion between the rim and the spoke. Therefore, the amount of entangled mud adhered during straight running was large, and this was easily carried around, and the amount of dropped mud was rather large, and the work marks were significantly disturbed. In particular, in recent years when the wheel diameter is increasing with the deluxeization of working machines, it is essential to solve the above problems.

Therefore, an object of the present invention is to provide a wheel for paddy fields which surely exhibits the traction force and the float action by the blade lugs, but also eliminates the resistance during traveling, and can reduce the carry around of mud. Is.

[0008]

SUMMARY OF THE INVENTION According to the present invention, a ring-shaped rim 4 is fixed to the tips of spokes 3 which are radially arranged, and the whole ring is covered with an elastic material with the rim 4 as a core. 5, and the blade lug 6 is provided on the outer peripheral portion of the elastic ring body 5.
In order to achieve the above-mentioned object, the following technical measures are taken.

That is, according to the present invention, between the vane lugs 6 and the inner peripheral portion 9 of the elastic ring body 5 excluding the fixing portion 10 between the spokes 3 and the rim 4 for reducing the resistance during traveling. When the paddy field wheel 1 according to the present invention adopting such a configuration is mounted on, for example, a passenger rice transplanter and travels in a field G, the mud escape recess 11 is formed. The float action and the traction action by the blade lugs 6 are ensured during the traveling, and the mud adhesion is reduced and the mud carry around is reduced.

At the time of turning (turning around) in a headland of a field, the mud relief recess 11 reduces the pushing of mud,
The turning resistance is reduced to ensure easy and smooth turning. In the present invention, the mud relief recess 11 can be formed in an arc shape or a trapezoidal shape, and it is desirable that the recess depth of the recess 11 is the same and the circumferential length is different. Further, the inner peripheral portion 9 of the elastic ring body 5 is constituted by a mud branch portion 8 which is tapered in the radial inward direction, and the mud escape concave portion 11 has a recess depth which does not form the mud branch portion 8. Due to
The mud branching portion 8 is formed in the portion of the blade lug 6, and the float action and the pulling action by the blade lug 6 are sufficiently secured, and there is no mud branching portion 8 between the blade lugs 6 and the mud escape recess 1
By 1, the mud pushing during traveling is eliminated and the turning resistance is reduced.

Further, since the blade lug 6 is not projected radially inward from the inner peripheral portion 9 of the elastic ring body 5,
The blade lug 6 is prevented from being bent, and the adhesion of mud is reduced to reduce the carry around. Further, the fixing portion 10 between the spoke 3 and the rim 4 is provided with a reinforcing body 12 having a wrap portion 12A in the outer peripheral half of the spoke 3 and an extending wing portion 12B extending from the wrap portion 12A in the rim longitudinal direction. Since the embracing portion 12A of the reinforcing body 12 is welded to the spokes 3 and the extending wing portions 12B are welded to the rim 4, it is possible to deal with deluxing work machines,
Further, the elastic ring body 5 has maximum width portions 14 on both left and right sides of the rim 4, and a ground contact portion 16 that is narrower than the maximum portion 14 via a step portion 15 on the radial outer side. As a result, slips and the like can be reduced regardless of the shallow field.

[0012]

DETAILED DESCRIPTION OF THE INVENTION Several examples of embodiments of the present invention will be described below with reference to the drawings. Referring to FIG. 1 showing a first example of the present invention, a paddy field wheel 1 according to the present invention is provided with an axle mounting boss 2 at the center of rotation, and spokes 3 are radially projected from the boss 2 and the spokes 3 An annular rim 4 is fixed to the tip.

Further, there is provided an elastic ring body 5 having the annular rim 4 as a core and the entire rim 4 being covered with an elastic material such as rubber. The plate-shaped vane lugs 6 respectively projecting at the respective positions are integrally provided with a circumferential interval, and the trapezoidal lug 7 is integrally provided at the outer peripheral portion of the elastic ring body 5 between the vane lugs 6. As shown in FIGS. 4 and 5, the inner peripheral portion 9 of the elastic ring member 5 has the left and right inclined surfaces 8
A mud branch portion 8 which is tapered in the radial direction via A and 8B is provided, and the blade lug 6 is not projected from the inner diameter of the mud branch portion 8, and the mud branch portion 8 impeller blades. Prevents bending of the lug 6 and the blade lug 6
The area is increased to improve the float action and traction action.

Inner peripheral portion 9 of the elastic ring member 5 between the blade lugs 6
In addition, a mud escape concave portion 11 is formed in a portion other than the fixed portion 10 between the spoke 3 and the rim 4 for reducing resistance during traveling (reduction of mud pushing). In the first example of FIG. 1, the recess 11 has a semicircular shape, and the recess 11 has the same depth but different circumferential lengths.

Thus, the small / medium recessed portion 11 is positioned near the fixed portion 10 and the large recessed portion 11 is located away from the fixed portion 10, so that the mud running around the fixed portion 10 is reduced. It ensures sufficient reduction of resistance when traveling. Further, as shown in FIG. 6, the recess 11 may be trapezoidal, and the trapezoidal recess 11 may be large / medium / small.

Spokes 3 and rims 4 as shown in FIGS.
In the fixing portion 10 to which is attached, a reinforcing body 12 having a wrapping portion 12A in the outer peripheral half of the spoke 3 and an extending wing portion 12B extending in the rim longitudinal direction from the wrapping portion 12A is provided. By welding T on the rim 4 and welding T1 on the inner circumference of the rim 4, sufficient durability of the wheel 1 associated with the deluxing of the working machine is ensured.

Further, as shown in FIGS. 1 and 6, a reinforcing plate 13 having a cross shape is welded to the spokes 3 to further secure sufficient durability of the wheel 1. At this time, the reinforcing plate 13 is formed into a cross shape, and the curved concave portion 13A is curved in the radial direction to reduce the resistance at the time of traveling, and to perform partial welding as shown by reference numeral T3 in FIG. As a result, the rusting portion of this kind of wheel 1 used in the paddy field (mud) is minimized.

Further, as shown in FIGS. 7 (A) and 7 (B), a maximum width portion 14 of the elastic ring body 5 is provided on both left and right sides of the rim 4, and a step is radially outward from the maximum width portion 14. Part 1
5, a grounding portion 16 having a narrow width is provided.
The trapezoidal lug 7 is projected in the. Further, the step portion 15 has a plurality of steps (two steps in the embodiment) in the radial direction, and a rib 17 extending in the circumferential direction is formed between the step portions 15 inside and outside the radial direction.

The width A of the maximum width portion 14 is 3 in the conventional case.
What was 0 to 40 mm was changed to 50 to 80 mm in this embodiment.
The lateral width B of the narrow contact portion 16 is 50 to 90% with respect to A. Here, the ratio of B / A is set to 50 to 90% because when it is 50% or less, the trapezoidal lug 7 has a low rigidity and is easily deformed, which deteriorates the straight traveling property.
This is because the significance of narrowing the width of the ground contact portion 16 becomes less at 90% or more, and is preferably 60 to 85%.

That is, in Fukada, the vehicle is settled down to the maximum width portion 14, and the vehicle runs under low ground contact pressure. On the other hand, in Asada, since the cultivator is hard, it does not sink up to the maximum width portion 14 and runs under high ground contact pressure. Therefore, regardless of whether it is Fukada or Asada, the slip ratio does not change and good performance is exhibited.

FIGS. 8 to 11 show another embodiment of the present invention, in which portions common to the above-mentioned embodiment are indicated by common reference numerals, and different points will be described below. Figure 8
The mud relief recess 11 is formed in a semi-circular shape and a trapezoidal shape, and the trapezoidal recess 11A is formed to have a recess depth that does not form the mud branching portion 8 and is shown in FIG. The one shown in FIG. 10 has a trapezoidal shape with all the recesses 11A having a recess depth that does not form the mud branch portion 8. The one shown in FIG. (11A) is formed in a recess depth where the mud branch portion 8 is not formed. Therefore, the cross section DD of FIGS. 8 to 10 is as shown in FIG. 11, and the elastic ring body 5 is substantially formed. Has a circular cross section.

In the above-mentioned embodiment, the rim 4 is exemplified by a pipe material, but it can be constituted by a solid rod material, a plate material or the like, and the blade lugs 6 are projected on both sides in the axial direction. It may be a blade, or one blade may alternately project in the circumferential direction.

[0023]

As described above in detail, according to the present invention, although the area of the blade lug is expanded and the float action and the traction action are improved, the circulatory property is not impaired and the mud is pushed. Not only can it be made smaller to prevent seedling collapse, but the amount of rubber used can also be reduced by the recess.

[Brief description of drawings]

FIG. 1 is an overall front view showing a first embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a fixed portion between a spoke and a rim in the first embodiment.

FIG. 3 is a sectional view taken along line AA of FIG. 2;

FIG. 4 is a sectional view taken along line BB of FIG.

5 is a sectional view taken along line CC of FIG.

FIG. 6 is an overall front view showing a second embodiment.

FIG. 7 is an elastic ring body showing a third embodiment, (A) is a cross-sectional view taken along the line CC of FIG. 1, and (B) is a perspective view.

FIG. 8 is an overall front view showing a fourth embodiment.

FIG. 9 is an overall front view showing a fifth embodiment.

FIG. 10 is an overall front view showing a sixth embodiment.

11 is a cross-sectional view taken along the line D-D of FIGS. 8, 9, and 10. FIG.

[Explanation of symbols]

 1 Wheel for paddy field 3 Spoke 4 Rim 5 Elastic ring body 6 Blade lug 11 Recess

Claims (7)

[Claims] 1. Spokes (3) arranged radially.
A ring-shaped rim (5) having an annular rim (4) fixed to the tip of the core and having the rim (4) as a core and covering the whole with an elastic material.
A paddy field wheel (1) integrally provided with vane lugs (6) in a radial arrangement on the outer peripheral portion of the elastic ring body (5), the vane lugs (6) being between the vane lugs (6) and the spokes. A mud escape recess (11) is formed on the inner peripheral portion (9) of the elastic ring body (5) excluding the fixed portion (10) between the rim (4) and the rim (4) to reduce resistance during traveling. Wheels for paddy fields that are characterized by 2. The paddy field wheel according to claim 1, wherein the mud relief recess (11) is formed in an arc shape or a trapezoid shape. 3. The paddy wheel according to claim 1, wherein the mud relief recesses (11) have the same recess depth but different perimeters. 4. The inner peripheral portion (9) of the elastic ring body (5) is
A mud branching portion (8) tapering in the radial direction, wherein the mud escape recess (11) has a recess depth that does not form the mud branching portion (8).
The paddy wheel according to any one of 3 above. 5. The vane lug (6) is an elastic ring body (5).
The paddy wheel according to any one of claims 1 to 4, wherein the wheel does not project radially inward from an inner peripheral portion (9) of the pad. 6. The holding portion (10) between the spoke (3) and the rim (4) has a holding portion (12A) at the outer peripheral half of the spoke (3) and a rim from the holding portion (12A). Reinforcement body (1) having elongated blade portions (12B) extending in the longitudinal direction
2), wherein the embracing part (12A) of the reinforcing body (12) is welded to the spokes (3) and the extending wing part (12B) is welded to the rim (4). Item 1
The paddy field wheel according to any one of to 5. 7. The elastic ring body (5) comprises the rim (4).
And a maximum width portion (14) on both right and left sides, and a narrow grounding portion (16) on the outer side of the maximum portion (14) via a step (15). The paddy field wheel according to any one of claims 1 to 6.