JP3366711B2 - Farm work machine - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an agricultural working machine, and more particularly, to an agricultural working machine capable of accurately performing plowing work while always maintaining a constant plowing depth.

[0002]

2. Description of the Related Art It is important to maintain a constant working depth of a field in a farm work machine using a conventionally known tractor, particularly in a farm work machine for a soil such as a plow which is relatively long along the working direction. However, its control is difficult, and in order to make this work relatively easy, for example, by controlling the posture of the bottom by the condition of the work surface,
Since the depth from the ground surface, in other words, the working depth is required to be constant, a type in which a working mechanism is moved up and down by operating a lift mechanism while measuring the ground height during work has been proposed.

Specifically, a gauge wheel that moves while contacting the ground surface is installed near the rear end of the work machine, and the gage wheel moves up and down, in other words, the gauge wheel. There is one that moves the working machine up and down by detecting the angle between the wheel arm that supports the rail and the frame of the working machine. For example, Japanese Utility Model Publication 5-1221 can be cited as a typical example.

[0004]

In such a working machine, a hydraulic circuit of a hydraulic control mechanism such as a draft mechanism provided in a tractor is provided by using some kind of transmission means for transmitting information obtained by the means for detecting unevenness on the field surface. The signal obtained by the hydraulic control circuit advances the work while moving the working machine up and down. Therefore,
The time lag from detection to control becomes a problem depending on the unevenness of the field surface, and there is a problem that the work accuracy is insufficient depending on the work progress speed.

Further, depending on the working environment, there is a case where the working machine actually lifts up, and vice versa, although it is necessary to immerse the working machine deeply. Is a problem in work.

This is because the gauge wheel is located near the rear end of the working machine, so that in the case of a depression, the gauge wheel is
Is used as a fulcrum, and the entire working machine is moved forward, and in addition, the upper link and the working machine (mast)
This is caused by the fact that a pin connection is provided between and, and a structure similar to a rigid joint is formed in the front-rear and vertical directions.

In particular, in a working machine such as a multi-row plow which is relatively long along the working direction, even if the lifting mechanism acts to move the working machine up and down, only the front part of the tractor moves greatly, It is common that the ends do not move up and down so much, and there was a problem that the intended purpose could not be achieved.

Furthermore, in the working machine mentioned as a conventional example, a tractor equipped with a hydraulic control mechanism such as a draft mechanism must be used, and most of the tractors currently popular in Japan can be put to practical use. There are also some problems.
Therefore, the present invention obtains information on the posture control of the working machine at the same time as sensing the environment on the surface of the field to perform desired control without a time lag, and further, a tractor not equipped with a hydraulic control mechanism such as a draft mechanism. The purpose is to enable the attitude control of the working machine.

[0009]

In order to achieve the above-mentioned object, the present invention comprises at least a mast for mounting an upper link of a tractor and a sensing wheel mounted on a component of a working machine. The mast has a mounting hole for an upper link that is long in the work advancing direction, the upper link is mounted through a pin passing through the mounting hole, and the sensing wheel is a component near the front of the agricultural work machine. Is mounted so as to roll in the work advancing direction, and the sensing wheel is configured so as to be able to contact the uncultivated land surface of the working ground. Further, at least, a mast for mounting the upper link of the tractor, and a sensing wheel mounted on a component of the working machine, the mast is composed of a fixed mast and a movable mast, the lower end of the movable mast is The fixed mast is pivotally attached to the lower end by a pivot pin, the upper link is attached to the movable mast, and the movable mast is movably supported within a certain range within a plane including the work advancing direction, The sensing wheel is attached to a component near the front of the agricultural working machine so as to roll in the work advancing direction, and is configured to be able to contact the surface of the uncultivated land on the working ground. Furthermore, the constituent member near the front of the agricultural working machine is a cross shaft.

[0009]

In order to achieve the above-mentioned object, the present invention provides an agricultural work machine using a tractor which is mounted on a tractor via a three-point link mechanism to perform work. The upper link is attached to the mast to which the link is attached with a long play along the work progressing direction, and it is possible to detect that the component near the front of the component of the agricultural work machine can come into contact with the uncultivated land surface of the work ground. It is characterized in that it is equipped with a wheel, and further, it is characterized in that a cross shaft is selected and configured as the frontmost constituent member of the agricultural working machine.

[0010]

[Function] In the case of a flat field surface, the attachment position of the upper link to the mast is at the center of the long mounting hole as play, and in the case of the field surface in which the working machine is raised, the attachment position is It is a field in which the bottom and the like are located at a certain position from the surface as the posture of the working machine by moving to the rear direction of the working machine. On the other hand, when the working machine is on the surface of the field where it falls downward, the mounting position of the upper link with respect to the mast moves in the forward direction of the working machine, and the posture of the working machine is at a certain position from the surface. The bottom is located.

[0011]

Embodiments of the present invention will be described below with reference to FIGS. 1 to 11. In these drawings, reference numeral 10 indicates a tractor, and this tractor 10 is provided with a three-point link mechanism composed of an upper link 11, lower links 12, 12.

The reversible plow 20 shown as a working machine is provided with a bottom 22 above and below a frame 21 to enable reciprocal reversal work, and a pair of two sheets is provided at the front of the frame 21. A mast 23 made of a plate material is erected.

Further, the mast 23 is provided with a long mounting hole 24 as a play along the working direction, and the pin 25 is inserted through the mounting hole 11a of the upper link 11 located in the internal space of the mast 23. Then, the upper link 11 is attached to the mast 23.

In other words, the pin 25 can be freely moved in the mounting hole 24, and the position of the pin 25 can be moved by the posture of the reversible plow 10 which changes during the work. Therefore, the length of the upper link 11 does not change, but the position with respect to the mast can change.

The reversible plow 20 is attached to the tractor 10 by the lower links 12 and 12 together with the upper link 11, and the lower links 12 and 1 are attached.
The second end is attached to the end of the crossbar 26 which is long along the working width direction.

At the center of the cross shaft 26, a sensing wheel 27 is rotatably mounted at a height such that it can come into contact with the surface of the field during the work, and the sensing wheel 27 detects unevenness of the field. By feeling and moving up and down, the front part of the reversible plow 20 is moved up and down.

Next, the actual work will be described. First, if the environment of the field, in other words, the condition of the ground on which the plow work is performed is almost flat, the relationship between the tractor 10 and the reversible plow 20 is that the pin 25 of the upper link 11 is attached as shown in FIG. It is located approximately in the center of the hole 24.

In this state, when the field shown in FIG. 7, that is, when the V-shaped land is reached, in the conventional reversible plow 30, the bottom floats to a position shallower than a predetermined working depth H, The depth from the field surface becomes shallow. This state is because the reversible plow 40, which is a working machine, moves forward with the gauge wheel 47 as the fulcrum.

On the other hand, according to the present invention, as shown in FIG. 5, the gauge wheel 47 serves as a fulcrum like the conventional plow (FIG. 7) (from the rear end of the working machine). Is not present, the bottom 22 is located at a predetermined depth H,
The depth from the surface is the same as in the flat field shown in FIG. 6, and the so-called tillage depth is a predetermined depth H.

On the contrary, when the field of the inverted V shape is reached, as shown in FIG. 9 in the conventional plow, the bottom dives to a position deeper than the predetermined plowing depth H, and the bottom from the surface. The depth becomes deep. However, according to the reversible plow of the present invention, as shown in FIG. 6, the working machine is in the forward ascending state with the sensing wheel 27 as a fulcrum, and the bottom 22 can be positioned at a predetermined working depth H. ..

According to the present invention, the movement of the pin 25 as described above is performed by the long mounting hole 24 of the mast 23 of the upper link 11.
Since the pin 25 moves along the surface, the unevenness in the field can be absorbed. Therefore, in the V-shaped terrain, the upper link 11 moves to the rear of the mounting hole 24, and in the inverted V-shaped terrain field. The position near the front of the mounting hole 24 is taken.

In the above description, the long mounting hole 2 is used as play.
4 is formed on the mast 23, the mast 23
It can also be implemented by changing the configuration of the mast 2 as shown in FIGS.
3 is fixed to the frame 21 fixed mast 231
And a movable mast 233 attached to the fixed mast 231 by a pivot pin 232.

The movable range of the movable mast 233 is set such that it can be moved according to the working environment between the rear surface 231a of the fixed mast 231 and the stopper 234 provided on the open portion 231b of the entire traveling direction. There is.

Therefore, the stopper 234 corresponds to the length of the long mounting hole 24 in the first embodiment.
And the rear portion 231a of the fixed mast 231.

Therefore, in the explanatory views of the working state shown in FIGS. 4 to 6, in the normal state, the movable mast 233 also serves as the stopper 234, and the rear portion 2 of the fixed mast 231.
In a V-shaped terrain environment where the movable mast 233 is not in contact with 31a, the movable mast 233 is located on the rear surface 23 of the fixed mast 231.
In the range up to hitting 1a, the rotary pin 232 partially rotates in accordance with the environment.

In the inverted V-shaped terrain, the movable mast 233 makes a partial rotational movement around the pivot pin 232 within the range of hitting the stopper 234 in accordance with its environment.

In this embodiment, the shape of the mounting hole of the upper link 11 of the movable mast 233 may be circular so that the mounting pin 25 can penetrate therethrough.

Although the cross shaft 26 is shown as the frontmost member of the working machine, a part of the frame 21 of the working machine may be used, and the meaning of the foremost part is strict physical and mechanical. It means that the most front member is preferable, and it is of a property that is appropriately determined depending on the type of the working machine, for example, near the front end of the frame that constitutes the working machine. It can also be attached via a support arm.

Alternatively, the end portion 11A of the upper link 11 can be mounted in the long mounting hole 24A as a play in the mounting portion 13 of the upper link 11 and the main body of the tractor 10.

[0030]

[0031]

As is apparent from the above description, according to the agricultural working machine and the tractor using the tractor of the present invention, the topographical changes of the working environment are moved up and down by contacting the uncultivated land and moving the sensing wheel. It is detected as movement in the direction, and a movable area is provided between the upper link of the tractor and the working machine based on this detected information, so it is possible to work while maintaining a constant working depth, and with that special It has an excellent effect that it is not necessary to mount expensive detecting means.

[Brief description of drawings]

FIG. 1 is a side view of a reversible plow according to the present invention.

FIG. 2 is a front view of the same.

FIG. 3 is an enlarged side view of a mast portion.

FIG. 4 is a river to which the present invention is applied in a V-shaped terrain field.
It is a work explanatory view of a sible plow.

[Fig. 5] A river applied with the present invention in a flat terrain
It is a work explanatory view of a sible plow.

FIG. 6 is a work explanatory view of a reversible plow according to the present invention in a field having an inverted V shape.

FIG. 7 is a work explanatory diagram of a conventional reversible plow in a V-shaped terrain field.

FIG. 8 is a work explanatory diagram of a conventional reversible plow on a flat terrain.

FIG. 9 is a work explanatory diagram of a conventional reversible plow in a field having an inverted V shape.

FIG. 10 is a partially cutaway perspective view of a mast according to another embodiment.

FIG. 11 is a side view of the movable mast.

FIG. 12 is an explanatory diagram showing a relationship between a tractor and an end portion of an upper link.

[Explanation of symbols]

10 tractors 11 Upper link 12 Lower Link 13 Upper link mounting seat 20 reversible plows 21 frames 22 Bottom 23 Mast 24 long mounting holes 25 pin 26 cross shaft 27 sensing wheels

─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-5-284801 (JP, A) JP-A-62-158403 (JP, A) Actual opening 2-70609 (JP, U) Actual opening Sho-62- 193802 (JP, U) Actual development Sho 62-36609 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) A01B 3/40 A01B 59/043

Claims (3)

(57) [Claims] 1. An agricultural working machine mounted on a tractor via a three-point link mechanism, comprising at least a mast for mounting an upper link of the tractor, and a sensing wheel mounted on a component of the working machine. , The mast has a mounting hole for an upper link that is long in the work advancing direction, and the upper link is mounted through a pin passing through this mounting hole, and the sensing wheel is a component near the front of the agricultural work machine. An agricultural working machine characterized in that it is mounted so as to roll in the work advancing direction, and that this sensing wheel is configured so as to be able to contact the surface of uncultivated land on the working ground. 2. An agricultural working machine mounted on a tractor through a three-point link mechanism, comprising at least a mast for mounting an upper link of the tractor, and a sensing wheel mounted on a component of the working machine. The mast includes a fixed mast and a movable mast, a lower end of the movable mast is pivotally attached to a lower end of the fixed mast by a pivot pin, and an upper link is attached to the movable mast. Is movably supported within a certain range within a plane including the work advancing direction, the sensing wheel is attached to a component near the front of the agricultural working machine so as to roll in the work advancing direction, and An agricultural machine characterized by being configured so as to be able to contact the surface of uncultivated land. 3. The cross shaft is used as a component member of the agricultural working machine near the forefront.
The agricultural work machine according to claim 2.