JP2774622B2 - Agricultural wheels - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial application field) The present invention relates to an agricultural wheel, and in particular, to management work in a field (cultivation, weeding, grooving, burrowing, burrowing, burying soil, burying, in a house It is used as a wheel for a management machine that performs floor making.

(Prior Art) As an agricultural wheel for a control machine, an iron disk with an iron traction blade attached to the outer peripheral side surface thereof (see Japanese Utility Model Application Laid-Open No. 61-108603, hereinafter referred to as a conventional example 1), (See Japanese Utility Model Application Laid-Open No. 61-108602 and Japanese Utility Model Application Laid-Open No. 62-66804, hereinafter referred to as Conventional Example 2), and a rubber pneumatic tire mounted on the outer periphery of a pneumatic rubber tire. One in which a towing lug is integrally formed (hereinafter, referred to as Conventional Example 3) is known.

(Problem to be Solved by the Invention) In the conventional example 1, when traveling on a normal road, an iron disk having a small coefficient of friction is in contact with the ground, so that the slip is large. It becomes intense.

In addition, because the aircraft slips on the step board to the truck bed, it is difficult to load and unload the aircraft on the bed, and it is difficult to work by slipping in soft fields such as sandy soil, and soil on the blades in wetlands. There was a problem of adhesion growth.

In the second conventional example, when traveling on a road, the iron blades are in contact with the ground, so that vibration is large. Further, since the iron blade is used, there is a problem similar to the first conventional example.

In the conventional example 3, although traveling on the road or traveling on the step board is not a problem, the amount of biting into the soil is small, so it is not suitable for work requiring traction force, and it is not suitable for works such as soft fields such as sandy materials and clayey materials. Even in a hard field, the traction force is not sufficient, and in wetlands, there is a problem that soil adheres and grows between rugs, and the range of application is limited.

An object of the present invention is to provide an agricultural wheel that can be applied to soft land, hard ground, wetland, and the like, has less vibration when traveling on a road, and can be loaded and unloaded on a cargo bed.

(Means for Solving the Problems) According to the present invention, a flat blade 7 that can be bent in the circumferential direction at intervals in the circumferential direction and that can be elastically restored after the deformation is provided on the annular elastic ring 4. Is an agricultural wheel integrally formed, and the following technical measures are taken to achieve the above object.

That is, in the agricultural wheel according to the present invention, in the agricultural wheel, the flat blade 7 protrudes radially outward from the elastic wheel 4 and protrudes in the axle direction and is located on the centripetal line XX of the elastic wheel 4. A flat plate portion 7A and a radially inner portion 7B connected to the flat plate portion 7A through a bent portion 7C having a receding angle θ with respect to the rotation direction Y of the wheel are formed in a substantially rectangular shape as viewed from the axle direction. The bent portion 7C has a radial dimension of the elastic ring 4 set to B.
Is characterized by being substantially located at the portion of B / 2.

Further, the axially outer portion 7b of the plate-like blade 7 can be provided alternately in the circumferential direction on one side and the other in the axial direction. Further, the axially outer portion 7b of the plate-like blade 7 Both can be protruded.

(Operation) The agricultural wheel 1 according to the present invention is used by being mounted on an axle such as a field management machine.

When traveling on a general road, the management machine using the wheel 1 as a traveling device, the blades 7 are elastically deformed even if the flat blades 7 are integrally formed on the annular elastic ring 4 at circumferential intervals. Therefore, no large vibration is caused by the presence of each blade 7.

In addition, the elastic wheel 4 having the flat blades 7 integrally has a larger coefficient of friction than conventional iron wheels, so that it has less slip, and the truck can be easily moved on the walking board to the loading board. Loading and unloading becomes easy.

When the management machine is run for management work in a soft field or a hard field such as a sandy field, the flat blade 7 protrudes radially outward from the elastic ring 6 and protrudes in the axle direction, and A flat plate portion 7A located on the centripetal line XX of the body 6 and a receding angle θ with respect to the rotation direction of the wheel.
Since it is formed in a substantially U-shape when viewed from the axle direction with the radially inner portion 7B connected via the bent portion 7C having a flat portion 7A, penetration of the flat plate portion 7A into the soil and removal from the soil are prevented. It becomes light and secures the traction force, on the other hand, excessive intrusion into the soil is prevented by the radial inner part 7B, and even if soil is loaded on the radial inner part 7B, the radial inner part 7B Since it is connected via the bent portion 7C having the receding angle θ with respect to the rotation direction of the wheel, it is less likely to carry dirt or the like.

Further, in the case of traveling in wetlands, even if soil tends to adhere to the flat blades 7, the blades 7 prevent the soil from adhering to repeat bending deformation and subsequent elastic restoration. Since the radially inner portion 7B has the receding angle θ, it is less likely that the mud or the like will slide down and be carried around from the radially inner portion 7B.

(Example) Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

1 to 6, reference numeral 1 denotes an agricultural wheel that can be used as a management machine or the like, and is constituted by a boss 2, a spoke 3, and an annular elastic ring 4.

The boss 2 is made of steel pipe material, is connected to the axle of the control device, has a bolt mounting hole 2A, and spokes 3 made of steel pipe material are radially arranged from the boss 2.

The elastic ring 4 is formed of an annular core 5 made of a steel pipe material and a rubber coating 6 covering the core 5, and the outer end of the spoke 3 is welded to the core 5. , This spoke 3
A rubber cylindrical portion 6A is integrally protruded from the covering 6 to cover the root portion of the core 5 and the base.

The elastic ring 4 is provided with a plurality of rubber blades 7 at equal intervals in the circumferential direction.
Are integrally formed, and each blade 7 has a flat plate shape formed by a radial outer portion 7a protruding radially outward from the elastic ring body 4 and an axial outer portion 7b protruding outward in the axle direction. It is bendable in the circumferential direction and is elastically recoverable after the deformation.

Further, each of the blades 7 has a centripetal line X of the wheel on the side of the ground.
-X and a radially inner portion 7B connected to the flat plate portion 7A via a bent portion 7C having a receding angle θ with respect to the rotation direction Y of the wheel from the axle direction. The receding angle θ is approximately 20 ° to 40 °.

As shown in FIG. 1, the bent portion 7C has a length substantially equal to E / 2 with respect to the radial overall length E of the blade 7, that is, when the radial dimension of the elastic ring body 4 is B. positioned.

As a result, when the flat plate portion 7A of the blade 7 bites into the soft ground D as shown in FIG. 7, the flat plate portion of the radially inner portion 7B becomes a resistance (pulling) for suppressing biting (subsidence), As shown in FIG. 8, the soil on (adhering to) the radially inner portion 7B with the rotation of the wheel 1 is made to easily slide down by the flat plate portion of the radially inner portion 7B as the blade 7 comes out of the field. Here, the growth of the attached soil is prevented.

On the other hand, in the hard field D1 as shown in FIG. 9, the flat plate portion 7A located on the centripetal line XX surely bites into the field D1 to secure a large traction force and prevent slip.

That is, for a soft field D like a sandy field, FIG.
In the comparative example shown in FIG. 12, first, as shown in FIG. 11, when the entire blade 7 'is inclined (crossed) at an advancing angle in the rotation direction Y with respect to the centripetal line X'-X', Due to the reaction force of the blade 7 ', the sinking of the wheel becomes too small to secure the traction force, there is a possibility that the soil is mixed, and the soil adhered to the blade 7' when falling out of the field D is difficult to fall, and it is carried around. In addition, when the entire blade 7 "is on the centripetal line X" -X "as shown in FIG. 12, the sinking of the wheel becomes extremely large, so that it is impossible to even rotate.

The flat blade 7 in the agricultural wheel 1 according to the present invention has a substantially V-shape in side view with a flat plate portion 7A located on a centripetal line XX and a radial inner portion 7B connected with a receding angle θ. This has important significance in eliminating the above-mentioned points.

In the embodiment of the present invention, the flat blades 7 have the axially outer portions 7b alternately arranged in the axial direction on one side and the other in the circumferential direction. This is because the periodic fluctuation of the traction force can be reduced as compared with a blade (both blades) having an axially outer portion projecting in both axial directions from the elastic ring 4. However, the outside of the axis of the flat blade 7 may be protruded in both axial directions.

Further, by positioning the flat plate portion 7A on the outer side of the diameter of the flat blade 7 on the centripetal line XX, the traction force is increased while traveling in a hard field, and the traction force is increased in both forward and reverse travels. To be consistent.

Further, ribs 7c and 7d are integrally formed from the front and rear surfaces in the circumferential direction of each blade 7 to the elastic ring 4, and the ribs 7c on the forward surface side are formed integrally.
The rib 7d on the reversing surface side is made thicker than c, and the rib 7d suppresses the extreme deformation due to the forward traction reaction force of the blade 7 here.

Further, from the ground contact side of the outer peripheral surface of the elastic ring body between the respective blades 7, a rubber-made projection 8 continuous in the circumferential direction is integrally formed so as to protrude. The provision of the projections 8 facilitates biting into the soil. For this reason, this wheel 1 is not used because it is too much bite in a mud such as a rice transplanter. In this embodiment, the radius of curvature R at the tip of the projection is R ≦ 1 // 3A when the cross-sectional shape of the elastic ring 4 is an arc-shaped surface having a diameter A on the axial side surface.

The inner peripheral surface side of the elastic ring 4 between the respective blades 7 is
The tip portion 9 has a tapered portion 9 whose width in the axial direction becomes thinner toward the inside of the diameter, so that when the wheel 1 sinks in the soil, the tapered portion 9 does not rise with the soil.

As shown in FIG. 6, when the radial dimension of the cross section of the elastic ring 4 is B and the axial dimension is A, 1.5 ≦ B / A ≦ 2.0
It is preferred that This is because if it is less than 1.5, the amount of biting into the soil is small, and the wheel 1 is likely to shift laterally in the axial direction. If it exceeds 2.0, the strength of the projection 8 becomes small, and the amount of rubber increases. This increases the cost.

Also, a disk may be used instead of the spoke 3,
The core body 5 may be formed of a square solid material, a plate material or the like instead of the pipe material.

In particular, when the core body 5 is made of a flat steel ring as shown in FIG. 10, the axial dimension A of the rib 4 can be made very small, and the bite can be improved in a hard field.
Becomes effective.

(Effect of the Invention) According to the agricultural wheel according to the present invention, when traveling on a normal road, since the flat blades 7 are made of an elastic material, no vibration occurs due to the presence of the flat blades 7. Also,
Since the elastic wheel 4 and the flat blade 7 are made of rubber (elastic material), they have a larger friction coefficient and less slip than conventional iron wheels. Therefore, normal road running can be performed without generating vibration or slip, running on the track board of the truck can be done without any trouble, loading and unloading to the body of the truck can be easily performed, sandy etc. Work can be performed without slipping even in soft fields.

Furthermore, according to the agricultural wheel according to the present invention, when traveling in wetlands, even if soil adheres to the flat blade 7, the flat blade 7 repeats bending deformation and elastic restoration after the deformation. Soil adhesion is prevented.

The flat blade 7 is connected to a flat plate portion 7A located on the centripetal line XX and a bent portion 7C having a receding angle θ with respect to the rotation direction Y of the wheel. Part 7B
When viewed from the axial direction, the shape is substantially く -shaped, so that biting into the field is ensured by the flat plate portion 7A, and excessive settlement can be suppressed by the inner diameter portion 7B, which is sufficient regardless of the hardness It can run without slipping while preventing excessive turbulence of the soil while securing sufficient traction force, and when the flat blade 7 comes off the field, its radial inner portion 7B has a receding angle θ, so that the soil adhered to this The detachment and fall can be ensured to prevent soil adhesion growth.

Therefore, the agricultural wheel of the present invention can be used irrespective of sandy land, clay land, wetland, and the like, and has a large profit.

[Brief description of the drawings]

FIG. 1 is a side view of an agricultural wheel according to an embodiment of the present invention, and FIG.
FIG. 3 is a sectional view taken along line II-II of FIG. 1, FIG. 3 is a view taken along the arrow III in FIG. 1, FIG. 4 is a view taken along the arrow IV in FIG. 1, and FIG.
6 is a sectional view taken along the line VI-VI in FIG. 1; FIG.
FIG. 9 to FIG. 9 are explanatory diagrams of the operation, FIG. 10 is a side view of a main part of another embodiment, and FIGS. 11 and 12 are operation diagrams of a comparative example. 1 ... agricultural wheel, 4 ... elastic wheel, 5 ... core, 7 ...
Flat blade, 7A ... flat plate, 7B ... radial inner part, 7C ... bent part

Claims (3)

(57) [Claims] A flat blade (7) integrally formed on an annular elastic ring (4) is capable of being bent and deformed in the circumferential direction at intervals in the circumferential direction, and is elastically restored after the deformation. An agricultural wheel, wherein the flat blade (7) protrudes radially outward from the elastic wheel (4) and in the axle direction, and the centripetal line X− of the elastic wheel (4). A radially inner portion which is connected to the flat plate portion (7A) located on X via a bent portion (7C) having a receding angle (θ) with respect to the rotation direction (Y) of the wheel. And (7B), the bent portion (7C) is substantially (B) / (B) when the radial dimension of the elastic ring (4) is (B). An agricultural wheel, wherein the agricultural wheel is located in part 2. 2. The method according to claim 1, wherein the outer wheel portion (7b) of the plate-like blade (7) is alternately provided in the axial direction on one side and the other in the circumferential direction. Agricultural wheels as described. 3. The agricultural wheel according to claim 1, wherein an outer portion (7b) of the flat blade (7) protrudes in both axial directions.