JP4387006B2 - Agricultural machines such as plow machines - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a farm work machine such as a plow work machine, and more particularly to a plow work machine, a subsoiler work machine, and further a farm work machine such as a stubble cult work machine that targets the inside of a field surface or less.
[0002]
[Prior art]
It is well known that farm work machines such as plow work machines are usually attached to a tractor by a so-called direct mounting type using a three-point link hitch, or a traction type mounting type.
Since farming with a tractor usually involves linear movement, the tractor and work implement can be integrated with this direct-mounting system, so that the work implement can move as the tractor moves. Convenient.
In addition, in the case where a work machine is mounted by a towing type, a large work machine having a large work capacity within the range of the tractor's towing ability can be used, and a curved movement is also possible. Depending on the purpose of work, it is convenient.
[0003]
[Problems to be solved by the invention]
When the tractor and work implement are mounted in the direct mounting format, there is no problem because most of the farm work is carried out by linear movement, but the peripheral edge of the field is not necessarily straight but also has serrated edges. Therefore, even if the tractor moves linearly along the edge, if the radius of curvature decreases, turning resistance is added to work movement, and turning movement as farm work is impossible.
If the shape of the field periphery is a straight line like a paddy field, there will be no problem, but if the periphery is uneven like a field, run the tractor along the field periphery and plow it. As described above, it is difficult to do efficiently.
Therefore, according to the present invention, depending on the state of the work, the work implement can be moved in a curved line even when moving along the curved movement of the tractor, such as towing, and the tiller is inverted to the peripheral shape of the field. An object of the present invention is to provide a work machine that can move along an arbitrary curve without being affected by the work.
It is another object of the present invention to provide a work machine that allows the work machine to be integrated with the tractor as if it is mounted on the road depending on the lift state or its posture.
[0004]
[Means for Solving the Problems]
To achieve the above object, the present invention comprises a mast frame having an upper link hitch hole at the upper end and a lower link hitch on both sides of the lower end, and is attached to the tractor via a three-point link. In agricultural machines such as plow work machines that perform work, the lower link hitch part has a long hitch hole along the direction of work progress, and the hitch position of the lower link can move along the hitch hole, and its movement is restricted. This makes it possible to rotate the work implement with respect to the tractor within a certain range, such as wearing a traction type during work. It is possible to move along, and the tilling inversion work can be performed to every corner of the field.
In addition, it is characterized by having a lock mechanism that pushes the cross shaft in the vertical direction, so it is fitted with a tow type during work, and it is fitted with a direct mount type depending on the locked state of the cross shaft by the lock mechanism. It is safe when moving and even during reversing work.
Furthermore, since the lower link is attached by the mounting pins of the both end support type, the integration of the cross shaft and the lower link is ensured.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to FIGS. In these drawings, a symbol T is a tractor, and a symbol P is a plow working machine representatively representing a farm working machine. The plow working machine P as a farm working machine has a mast frame 10 at the head position in the work traveling direction. A work machine frame 20 extends obliquely behind the mast frame 10, and five bottoms 21, 22, 23, 24, 25 are provided on the upper and lower sides of the work machine frame 20 in contrast to the reverse directions. A reversible plow working machine is constructed. The work machine frame 20 constitutes a reversible plow work machine that is rotatable with respect to the mast frame 10 and can be reversed by expansion and contraction of the reverse cylinder 26.
[0006]
The tractor T has an upper link U and a lower link L constituting a three-point link hitch. The upper link U is a hitch pin P1 in a hitch hole near the upper end of the mast frame 10, and the lower link L is a mast frame. 10 is attached to a hitch portion at a lower end portion extending on both sides by a mounting pin 45 described later.
[0007]
The tractor T is equipped with a plow working machine P, which is a working machine, by the above-described three-point link hitch, and the plow working machine P is attached with five bottoms from the first bottom 21 to the fifth bottom 25. The work device is configured.
[0008]
In FIG. 2 and the following, there are shown an enlarged view of the mast frame 10 as viewed from the tractor side, a plan view, and a side view. The details of these drawings will be described.
First, in FIG. 2, a mast 11 constituting a mast frame 10 is formed by two plate-like members arranged at intervals, and a bearing portion 12 for forming a reversible mechanism at the lower end thereof. There is a lower frame 13 that supports the bearing portion 12 at the center. The lower frame 13 has hitch frame 14, 14 standing vertically at both left and right ends, and a lower link hitch 15 is located at the lower end of each hitch frame 14. Is formed.
The lower link hitch portion 15 is formed with a notch 15A for guiding the cross shaft 40 from below.
[0009]
A lock cylinder 31 constituting a lock mechanism 30 that catches and fixes the cross shaft 40 is attached to the outer side surface of the hitch frame 14, and the lock cylinder 31 extends and contracts in the vertical direction. The upper end position of the lock cylinder 31 is supported at one point by the pin 32 with respect to the hitch frame 14.
A lock plate 33 is attached to the rod 31A of the lock cylinder 31. The lock plate 33 is allowed to move only in the vertical direction by a guide 34 attached along the hitch frame 14. Yes.
The lock plate 33 can be fixed so that it cannot move in the hitch hole by pressing a cross shaft 40, which will be described later, from above with its lower end.
[0010]
Further, flanges 41 are attached to both left and right end portions of the cross shaft 40, and an accommodation bracket 42 of a lower link L having a "U" shape in front view is attached to face the flange 41. The front and rear in the traveling direction are opened to form an accommodation space V for the lower link L so that the end of the lower link L of the tractor can be inserted and accommodated.
A pin hole 43 is formed in the end surface of the cross shaft 40, and a window hole 44 having a center common to the pin hole 43 is formed in the receiving bracket 41, and the pin hole 43 on the end surface of the end portion of the cross shaft 40 is formed. On the other hand, the mounting pin 45 can be integrated through the window hole 44 of the housing bracket 42 through the window hole 44 of the housing bracket 42, the window hole L1 of the lower link 40, and the pin hole 43. Yes.
At this time, the mounting pins 45 penetrating the lower link L serve as both end support pins and support the lower link L.
[0011]
And the notch 15A for accommodating the said cross shaft 40 is formed in the lower end part of the right and left hitch frame 14, and the cross shaft 40 is accommodated in succession to this notch 15A, and it follows a work advancing direction. A long hitch hole 16 is formed. The cross shaft 40 can move along the working direction by the length of the hitch hole 16 and has a so-called “back”.
The notch 15A is for introducing the cross shaft 40 in the auto hitch type into the rolink hitch portion 15 formed in the mast frame 10 of the plow working machine P, so that the cross shaft 40 does not fall off after being mounted. It is locked by a hook or the like. This locking mechanism only needs to be able to close the notch 15A as necessary. As an example, as shown in FIG. 7, the substantially L-shaped hook 16A has a proximal end pivotally attached to the hitch frame 14 by a pin 14A, and the hook 16A is rotated by 90 degrees by the hook portion 16B. The notch 15A can be closed. A through bolt 16Y for keeping the notch 15A in an open state or a closed state is inserted into the hook 16A through a window hole 16X at the base of the hook portion 16B. The window hole 16X is a hitch portion frame 14. It can be overlapped with the window hole 14X drilled in, and both can be fixed by passing the through bolt 16Y through both the window holes 16X, 14X, and the hook nut 16A is released by releasing the coupling of the bolt nut. The nut 16Z of the through-bolt 16Y hits the edge of the hitch frame 14 and cannot be rotated downward by inserting the bolt nut through the window hole 16X.
Thus, by closing the notch 15A, the cross shaft 40 accommodated in the hitch hole does not fall off.
To remove the cross shaft 40, the cross shaft 40 can be taken out from the hitch hole 16 by opening the notch 15A, and the hitch frame 14 and the cross shaft 40 can be separated.
At this time, if the through bolt 16Y is passed through the window hole 16X of the hook 16A and the nut 16Z is screwed in, this will hit the edge of the hitch frame 14, preventing the hook 16A from rotating downward, and the notch 15A The blockage is suppressed.
[0012]
As described above, since both ends of the cross shaft 40 can move along the working direction within the range of the long hitch hole 16, in other words, the left and right ends can freely move in the front-rear direction. The posture of the cross shaft is not limited to the state along the work width, but the cross shaft 40 can take a posture in an oblique state instead of an orthogonal state with respect to the work traveling direction.
[0013]
In this state, as shown in FIG. 6, the plow work machine P is bent in a plan view by about 15 degrees with respect to the tractor T, as shown in FIG. Is a state in which the tractor T can turn left, and (B) shows a state in which the tractor T can turn right.
[0014]
In these states, the movement of the cross shaft 40 caused by the turning of the tractor T is possible within the range of the length of the long hitch hole 16, so that the right end of the cross shaft 40 along the long hitch hole 16 in the left turning state of the tractor T. When the tractor T turns left, the left end of the cross shaft 40 moves forward along the long hitch hole 16 so that the tractor T and the plow work machine P It is possible to take a bent state in between.
In particular, since the lower link L originally has some play in the left-right direction, coupled with the aforementioned movement of the cross shaft 40 in the front-rear direction, it is possible to move with considerable flexibility and increase the followability to the tractor. .
[0015]
As a result, the plow work along the peripheral shape can be performed even in the peripheral part of the farm field that is not necessarily in a straight state, and the continuous work of the entire farm field is possible.
In this operation, the position of the cross shaft 40 is changed due to the resistance applied to the plow work machine by the steering operation of the tractor T, and the cross shaft moves in the long hitch hole 16 to change the follower posture with respect to the tractor T. Can be taken.
[0016]
In addition, when the tractor T and the plow working machine P are moved in a straight line or in other words, when the tractor T takes a lift-up position, the left and right lock mechanisms are used. By extending 30 cylinder rods 31A and bringing the lock plate 33 into strong contact with the cross shaft 40, the free movement of the cross shaft 40 is fixed, and the plow working machine P changes with respect to the tractor T depending on the posture. Do not do that.
When the tractor T needs to move in a curved line such as around the field, the locking mechanism 30 is released, in other words, the lock cylinder 31 is contracted to release the locked state, and the cross shaft 40 has a long hitch hole. It can be moved in the range of 16.
[0017]
In the above description, the plow work machine has been described as a representative of the farm work machine.
[0018]
【The invention's effect】
As is clear from the above description, according to the agricultural working machine such as the plow working machine according to the present invention, unlike the direct mounting type, the cross shaft is provided at the left and right end portions corresponding to the hitch holes between the tractor and the working machine. Therefore, the work implement can move following the movement of the tractor's curve. Similarly, agricultural work can be continuously performed. In other words, it can perform the same function as the traction-type mounting during work, and can perform the direct-mounting type function during lifts.
[0019]
In addition, the posture of the work machine can be reliably fixed in the traveling state of the work machine and the lift-up state associated therewith, and the plow work machine can safely perform the reverse operation after the lift.
[Brief description of the drawings]
FIG. 1 is a side view of a plow working machine according to the present invention.
FIG. 2 is a view similarly showing the area around the mast frame as viewed from the tractor side.
FIG. 3 is a side view around the mast frame.
FIG. 4 is a plan view around the mast frame.
FIG. 5 is an exploded perspective view of a lock mechanism portion.
FIG. 6 is a plan view showing a turning state of the work machine.
FIG. 7 is an exploded perspective view of a cross shaft locking mechanism.
[Explanation of symbols]
T tractor P plow working machine 10 mast frame 11 mast 12 bearing part 13 lower frame 14 hitch part frame 14A pin 15 lower link hitch part 16 long hitch hole 16A hook 16B hook part 16X window hole 16Y through bolt 16Z through Bolt nut 20 Work machine frame 21-25 Bottom 26 Reverse cylinder 30 Lock mechanism 31 Lock cylinder 31A Rod 32 Pin 33 Lock plate 34 Guide 40 Cross shaft 41 Flange 42 Receiving bracket 43 Pin hole 44 Window hole 45 Mounting pin

Claims (3)

In agricultural working machines such as plow working machines equipped with a mast frame with upper link hitch holes on the upper end and lower link hitch parts on both sides of the lower end and mounted on the tractor via a three-point link,
The lower link hitch part is a long hitch hole along the work progress direction, and the cross shaft with the lower link ends attached to both ends is inserted through the hitch hole so that it can move along the work progress direction. The lower link hitch position can move along the hitch hole,
Lock cylinders are provided on both sides of the lower part of the mast frame, and a lock plate is provided at the lower end of the lock cylinder. By moving the cylinder rod with the lock cylinder and pressing the lock plate against the cross shaft, the cross shaft A farm working machine such as a plow working machine, comprising a lock mechanism that can be locked so that it cannot move in a work traveling direction . The lock cylinder is attached to the hitch frame on both lower sides of the mast frame. When the cylinder rod is extended by the lock cylinder and the lock plate is pressed downward against the cross shaft, the lock cylinder is locked. 2. A farm working machine such as a plow working machine according to claim 1 , wherein the locked state is released when the machine is contracted . The hitch hole is formed with a notch for introducing the cross shaft from the lower side, and a hook is pivotally attached to the hitch part frame,
The cross shaft is introduced into the hitch hole through the notch, and the notch is closed with the hook, and the hook is fixed to the hitch part frame, whereby the closed state can be maintained. An agricultural working machine such as a plow working machine according to claim 1.

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