JP2774692B2 - Agricultural wheels - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial application field) The present invention relates to an agricultural wheel, and more specifically,
The present invention relates to a device used as a wheel for a management machine for weeding, ditching, digging a hole, cultivating soil, burying soil, covering soil, making a floor in a house, and the like in a field.

(Prior Art) As an agricultural wheel for a control machine, an iron disk is provided with iron traction blades on the outer peripheral side surface thereof (see Japanese Utility Model Laid-Open No. 61-108603, Japanese Patent No. 744965, and Japanese Patent No. 744924). ), With an iron traction lug attached to the outer peripheral surface of an iron rib (see Japanese Utility Model Laid-Open No. 61-108602 and Japanese Utility Model Laid-Open No. 62-66804). There are known lugs integrally formed.

(Problems to be Solved by the Invention) With a conventional iron disk having iron traction blades attached to the outer surface, during normal road running, the iron disk having a small coefficient of friction comes into contact with the ground, so that the slip is large, and However, when the aircraft is tilted, the towing blades touch the ground and vibrate violently, and the aircraft slips on the track to the truck bed, making it difficult to load and unload the aircraft on the bed. Further, in soft fields such as sandy soil, the work is difficult due to slippage, and in wetlands, soil adheres to the blades.

With a conventional iron rib with a work surface with an iron traction lug attached to it, the iron blades touch the ground during normal road running, causing large vibrations.In addition, the lug may fit into the track plate on the truck bed. It is difficult to load and unload to the carrier. Further, in soft fields such as sandy soil, the work is difficult due to slippage, and in wetlands, soil adheres to the blades.

With a conventional pneumatic rubber tire with a rubber traction lug integrally formed on the outer circumference, normal running on the road and running on the ayumi board are not a problem, but the amount of biting into the soil is small, so for work requiring traction force Is not suitable, and traction is not exerted even in soft fields such as sandy or hard fields such as clay, and the applicable range is narrow. In wetlands, soil adheres between the lugs. Therefore, when the lug interval is increased, the vibration becomes severe.

An object of the present invention is to solve the above-mentioned problems of the conventional agricultural wheels.

(Means for Solving the Problems) According to the present invention, a trapezoidal lug is formed so as to protrude with a circumferential interval on the outer peripheral surface of the ring-shaped elastic ring 7 at the circumferential direction, and a flat plate is formed on the side surface of the trapezoidal lug in the axle direction. Protruding blades 8 are formed in the axle direction,
The flat blade 8 is an agricultural wheel that can be bent and deformed in the circumferential direction and that can be elastically restored after the deformation. In order to achieve the above-described object, the following technical measures are taken. .

That is, the agricultural wheel according to the present invention includes the elastic wheel 7
A radially outwardly tapering elastic protrusion 12 for connecting the trapezoidal lugs that are adjacent in the circumferential direction to each other is integrally formed on the outer peripheral surface of the ground, and the flat blade 8 is provided with an axle from the elastic wheel 7. The large wing 9 and the small wing 10 whose projecting amount is large and small are formed to protrude left and right from both axial side surfaces of the trapezoidal lug, and furthermore, the large wing 9 and the small wing 10 are circumferentially connected to each other. It is characterized by being arranged alternately on the left and right.

In the present invention, when the amount of protrusion of the large blade 9 in the axle direction is A and the amount of protrusion of the small blade 10 in the axle direction is B, the large and small blades 9,
The protrusion ratio B / A × 100 of 10 is desirably set to 20 to 50%, and the axial wing of the large blade 9 is
A flat plate portion 9A located on the centripetal line OO and a radially inner portion 9B connected to the flat plate portion 9A at a receding angle θ with respect to the rotation direction of the wheel, as viewed from the axle direction. And the lateral wings of the small blades 10 are provided with centripetal lines O-
Advantageously, it is composed of a flat plate located on O.

(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 the control device using the wheels as a traveling device travels on a general road, since the elastically deformable plate-like blades 8 are integrally formed on the elastic wheel 7, large vibration is caused by the presence of each blade 8. There is no.

In addition, the elastic wheel body 7 having the flat blades 8 integrally has a larger friction coefficient than conventional iron wheels, so that slip is reduced, and the traction force is reliably transmitted while suppressing vibration during traveling on a general road, and the truck carrier is provided. It is also possible to run on a walking board without any trouble.

When the management machine is run for management work in a soft field or a hard field such as a sandy field, the elastic protrusions 12 tapered outward in the radial direction provided on the outer circumference of the elastic ring 7 on the ground side are easy to bite into the soil. It has a greater bite depth than conventional pneumatic rubber tires, and generates a large traction force in combination with the flat blades 8, which is suitable for work requiring traction force while preventing slippage.

Further, in the case of traveling in wetlands, even if soil adheres to the flat blades 8, the blades 8 prevent the soil from being adhered because the bending deformation and the subsequent elastic restoration are repeated.

In addition, the flat blade 8 has a large blade portion 9 and a small blade portion 10 whose axial protrusion amount from the elastic ring body 7 is large and small, and is arranged alternately on the left and right. Is also advantageous in overall performance.

In other words, when the flat blades are formed of large blades having a large protrusion amount on both the left and right sides, mud adhesion increases if the blade pitch remains unchanged, while if the blade pitch is increased (increased) to prevent mud adhesion, Conversely, the occurrence of vibration increases.

In addition, when the flat blades are formed only with small blades having a small protrusion amount and are alternately arranged on the left and right sides, mud adhesion can be prevented as compared with those formed with large blades on both the left and right sides.
There is still a problem in terms of vibration.

These problems could be solved by arranging the large and small blades 9 and 10 alternately on the left and right. By setting the projecting ratio of the large and small blades 9 and 10 to 20 to 50%, the traction force was mainly In addition to supporting the traction force at the small blade portion 10 while preventing the mud from being carried at 9, the overall performance is advantageous in combination with assisting the traction force.

(Example) Hereinafter, an example of the present invention is described with reference to drawings.

FIGS. 1 to 5 show a first embodiment of the present invention.
Is an agricultural wheel, and has a boss 4 having an insertion hole 2 for an axle such as a management machine in the center and a mounting hole 3 for pins, bolts, etc.
In this embodiment, three spokes 5 are radially welded, a hollow metal rim 6 serving as an annular core material is welded to the tips of the three spokes 5, and the rim 6 is coated with an elastic material such as rubber. Thus, an elastic ring 7 is formed.

The elastic ring 7 is integrally formed with flat blades 8 which can be bent and deformed in the circumferential direction at substantially equal intervals in the circumferential direction and can be elastically restored after the deformation.

The flat blade 8 protrudes radially outward from the elastic wheel body 7 and protrudes in one of the axle directions by a protrusion amount A, and protrudes by the other amount in the axle direction by a protrusion amount B. The large and small blades 9 and 10 are formed to protrude from both sides in the axial direction of the trapezoidal lug, and the protruding ratio (B / A
× 100) is 20 to 50%.

Assuming that the agricultural wheel 1 rotates (forwards) in the direction indicated by arrow C in FIG. 1, the axial wing of the large wing 9 has a flat plate portion 9A on the centripetal line OO on the ground cutting side. A radially inner portion 9B that is continuous with the portion 9A intersects the centripetal line OO at a retreat angle θ in the rotation direction C, so that the side view (as viewed from the axle direction).
The small wing portion 10 has a substantially 部 shape, while the side wing portion of the small blade portion 10 is a flat plate portion on the centripetal line OO.

The flat blade 8 has a substantially trapezoidal cross section, and the top of the ground is located on the same circumferential line.
The reverse side (anti-kick side) is thicker than
A substantially trapezoidal lug is formed substantially at the center in the left-right direction of the elastic wheel body 7 to improve straightness and suppress vibration, suppress excessive elastic deformation during forward movement, and secure a large traction force.

However, in the first embodiment, since the rotation direction of the agricultural wheel 1 is determined as shown by the arrow C, the flat portion 9A is provided with the step portion 11 on the side opposite to the kick surface as shown in FIG. It is more advantageous to secure the bending due to the elastic deformation and to improve the detachability of the attached mud by the elastic restoration.

The flat blade 8 composed of the large and small blades 9 and 10
9 and 10 are arranged alternately in the left and right direction in the circumferential direction. The large wings 9 ensure sufficient traction force, suppress the soil clogging between the large wings 9, improve the soil separation, and improve the large wings 9.
By arranging the small blades 10 between them, vibration is suppressed and traction force is assisted.

A substantially trapezoidal lug portion of the flat blade 8 is opposed to an elastic projection 12 having a tapered shape in a radially outward direction, in this embodiment, a nipple shape in a cross section, on an outer periphery of the elastic ring member 7 on the grounding surface side. Are integrally formed so as to be connected to each other, and the inner periphery of the elastic ring 7 on the side opposite to the ground contact surface is tapered in a radially inward direction. The formed inner peripheral projections 13 are integrally formed so as to connect the large blade portions 9 of the flat blade 8 facing each other in the circumferential direction.

The elastic projection 12 has its outer peripheral top surface on the circumference slightly inward of the top surface of the substantially trapezoidal lug of the flat blade 8, and has a radial dimension of D and an axial direction as shown in FIG. When the dimension is E, D / E is 1.5 to 2.5.

This is because if it is smaller than 1.5, the amount of biting into the soil is small, the vibration suppression force is low, and the wheel 1 is likely to be laterally displaced in the axial direction. This is because it is too small and the amount of rubber increases, which is disadvantageous in terms of cost.

The inner peripheral projection 13 has a substantially triangular shape in cross section, so that when it comes out of the soil, soil or the like attached to the projection 13 is prevented from being distributed to the left and right and lifted.

7 and 8 show a second embodiment of the present invention.

The second embodiment is basically the same as the first embodiment described above with reference to FIGS. 1 to 5, so that common parts are denoted by common reference numerals, and differences will be described below.

As shown in FIG. 7, the large blade portion 9 of the flat blade 8
Is a flat plate portion 9A on the centripetal line OO.
Therefore, in the second embodiment, the wheel can be mounted without any restriction on the rotational direction of the wheel.

However, by comprising the flat plate portion 9A and the radially inner portion 9B as in the first embodiment, biting into the field is ensured by the flat plate portion 9A, and excessive settlement is suppressed by the radially inner portion 9B. Regardless of the traction, the tractor can travel without slipping by preventing excessive turbulence of the soil while securing sufficient traction force. In addition, when the blade 8 comes out of the field, the separation and fall of the soil attached to the blade 8 is ensured. This is advantageous in that adhesion growth can be prevented.

In both the first embodiment and the second embodiment described above, the ratio of protrusion, which is B / A × 100, is set to 20% to 50%, as shown in FIG. To 100) and to suppress the mud adhesion index (index by visual judgment) (however, Fig. 6 shows the test results of running the farmland with this agricultural wheel mounted on a one-wheel control machine. Is shown.

In other words, if it is less than 20%, it is advantageous in terms of the mud adhesion index, but disadvantageous in terms of traction index,
At 50% or more, there is no problem in terms of traction index, but it is disadvantageous in terms of mud adhesion index (Fig. 6,
Graph line T indicates the soil adhesion index, and graph line F indicates the traction index).

In the first and second embodiments described above, the following design changes are free.

Use discs instead of spokes.

Rims should be solid, not pipe.

In particular, when the rim is a flat steel ring and the thin portion of the flat plate is on the ground contact side, biting in a hard field is improved.

When the pitch of the flat blades is increased, trapezoidal lugs are provided between the blades to ensure straightness and suppress vibration.

(Effects of the Invention) The present invention is as described above, and the flat blade 8 protrudes radially outward from the elastic ring body 7 and protrudes in one direction in the axle direction and A in the other direction. Small protrusion B
The large and small blades 9 and 10 are projected alternately.The large and small blades 9 and 10 are arranged alternately on the left and right, so vibration and slip are small, and comprehensive performance that prevents soil adhesion growth while securing traction force Excellent in

Further, an elastic protrusion 12 tapering outward in the radial direction is integrally formed on the outer periphery of the elastic ring 7 on the ground side to connect the flat blades 8 facing each other in the circumferential direction to each other. Intrusion into the tire can be better than pneumatic tires.

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]

The drawings show an embodiment of the present invention, and FIGS.
1 is an overall side view with a part cut away, FIG. 2 is an enlarged sectional view taken along line XX of FIG. 1, and FIG.
FIG. 4 is a plan view of a main part, and FIG.
FIG. 6 is a sectional view taken along the line Z-Z, FIG. 6 is a graph showing the protruding ratio of the blades, a traction force index and a mud adhesion index, FIG. 7 is a side view of a main part of the second embodiment, and FIG. is there. 1 ... agricultural wheel, 6 ... rib, 7 ... elastic ring, 8 ...
Flat blades, 9 large blades, 10 small blades, 12
Elastic projection.

Claims (3)

(57) [Claims] 1. A trapezoidal lug is formed on an outer peripheral surface of a ring-shaped elastic ring (7) with a circumferential interval so as to protrude, and a flat blade (8) is formed on an axle side surface of the trapezoidal lug. An agricultural wheel protruding in the axle direction, wherein the flat blades (8) can be bent and deformed in the circumferential direction and can be elastically restored after a change, and the elastic wheel (7) is grounded; The outer peripheral surface is integrally formed with a radially outwardly tapering elastic protrusion (12) for connecting the trapezoidal lugs adjacent to each other in the circumferential direction, and the flat blade (8) is provided with an elastic ring (7). ), A large wing portion (9) and a small wing portion (10) having a large and small amount of protrusion in the axle direction are formed so as to protrude left and right from both axial side surfaces of the trapezoidal lug, and further, the large wing portion (9). And a small wing portion (10) arranged alternately left and right in the circumferential direction. 2. When the amount of protrusion of the large blade portion (9) in the axle direction is A and the amount of protrusion of the small blade portion (10) in the axle direction is B, the protrusion ratio B / The agricultural wheel according to claim 1, wherein A x 100 is 20 to 50%. 3. An axial wing portion of the large wing portion (9) includes a flat plate portion (9A) located on a centripetal line OO of the elastic ring (7) and a rotation of a wheel by the flat plate portion (9A). When viewed from the axle direction, it is formed in a substantially V-shape with the radially inner portion (9B) connected with a receding angle (θ) to the direction, and the side wing portion of the small blade portion (10) is The agricultural wheel according to claim (1) or (2), comprising a flat plate portion located on a centripetal line OO of the elastic ring (7).