JPH07135801A - Farm working machine and tractor pulling the same - Google Patents

Abstract

PURPOSE:To provide a farm working machine consisting of a specific construction and capable of controlling an attitude of the working machine without time-lag corresponding to a state of a field surface and carrying out a tilting work, etc., always at a constant depth. CONSTITUTION:At first a sensitive wheel 27 capable of contacting on a uncultivated surface of a working ground is attached in the center of a cross shaft 26 in the forefront of a reversible plow 20, which is a farm working machine used by mounting on a tractor 10 by 3 points link mechanism, and the front part of the reversible plow 20 is moved up and down by moving up and down the sensitive wheel 27 corresponding to irregularities of a field surface. Further, e.g., an upper link 11 is attached to a mast 23 through a long clearance by constructing a pin inserted to the upper link 11 made on the mast 23 and freely movable within a long insert hole in the direction of travel. By this construction, a holding position of the upper link 11 moves depending upon a varying attitude of the reversible plow 20 during a working and a bottom 22 can be held at a constant depth H.

Description

Detailed Description of the Invention

[0001]

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

[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, Generally, the ends do not move up and down so much, and there is a problem that the intended purpose is often not 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.

In view of the above, according to the present invention, when the environment of the field surface is sensed, the posture control information of the working machine is obtained at the same time, desired control is performed without a time lag, and a hydraulic control mechanism such as a draft mechanism is mounted. The purpose of the present invention is to make it possible to control the attitude of the work machine even by a tractor that is not installed.

[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 substantially 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 a component of the foremost part of the working machine, a part of the frame 21 of the working machine may be used, and the meaning of this foremost part is strict physical and mechanical. It means that the most front member is preferable, and it has a property that is appropriately determined depending on the type of working machine.For example, it is closer to the front end of the frame that constitutes the working machine. It can also be attached via a support arm.

In addition, the end portion 11A of the upper link 11 may be attached to the long mounting hole 24A as a play in the attachment portion 13 of the upper link 11 and the main body of the tractor 10 (FIG. 12), or the upper link itself may be a cylinder and piston type. It is also possible to implement by expanding and contracting the upper link 11 and by making the upper link 11 a telescopic type in an appropriate range.

When the upper link 11 is of a cylinder or piston type, it is necessary to set the piston stroke as a play to a required length.

[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 tractor 11 upper link 12 lower link 13 upper link mounting seat 20 reversible plow 21 frame 22 bottom 23 mast 24 long mounting hole 25 pin 26 cross shaft 27 sensing wheel

Claims (5)

[Claims] 1. In an agricultural work machine using a tractor that is mounted on a tractor via a three-point link mechanism to perform work, at least a mast to which the upper link is attached has a long play along a work advancing direction through the upper link. The agricultural working machine is characterized by being equipped with a sensing wheel capable of coming into contact with the surface of the uncultivated land of the working ground, in a constituent member near the front of the constituent members of the agricultural working machine. . 2. An agricultural work machine using a tractor, which is mounted on a tractor via a three-point link mechanism to perform work, the mast of the work machine includes a fixed mast and a movable mast, and the movable mast is An agricultural working machine characterized in that a lower end portion thereof is movably supported by a pivot pin along a plane including a work advancing direction. 3. A farm work machine using a tractor according to claim 1 or 2, wherein the frontmost constituent member of the farm work machine is a cross shaft. 4. A tractor in which an upper link included in the tractor is attached with play in a work advancing direction at a connecting portion with the tractor. 5. A tractor in which an upper link of the tractor is configured to be capable of expanding and contracting along its length direction.