JP3135809B2 - Folding 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 a work machine which is attached to the rear of a tractor so as to be able to move up and down via a three-point link mechanism and has a long length in the left-right direction. Field of the Invention The present invention relates to a foldable agricultural work machine such as a scraper harrow, which can be folded into a fold.

[0002]

2. Description of the Related Art Conventionally, an agricultural machine has been mounted on a rear part of a tractor via a three-point link mechanism so as to be able to move up and down.
Agricultural implements, such as scratching harrows, which transmit power from the TO shaft to an input shaft of the agricultural implement and have a long length in the left-right direction (the total length is about 3 meters) are known. This agricultural machine with a long length in the left-right direction not only requires a large space when moving after being mounted on a tractor, transporting it with a truck, or storing it in a warehouse, but also mounting it on the tractor When being moved,
There is a problem that it becomes a hindrance to traffic because it is greatly extended in the left-right direction.

[0003] Therefore, an agricultural work machine having a leveling plate at the rear end of the working rotor portion is provided with a left and right working rotor portion and a leveling plate portion substantially at the center in the longitudinal direction. May be substantially coaxially foldable from both sides of a central portion.

[0004]

In the prior art described above, the left and right working rotor portions and the flat plate portion are substantially coaxially folded from both sides of the central portion with respect to the central portion. There is a problem that the flattened flat portion is lowered below the working rotor portion, and the lifting height is lowered, which may hinder the movement. The present invention has been made to solve the above problems.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides an agricultural work machine which is mounted on a rear portion of a tractor via a three-point link mechanism so as to be able to move up and down, and has a long length in the left-right direction. The above-mentioned agricultural work machine is provided with a leveling plate at the rear end of the working rotor portion, and the left and right working rotor portions and the leveling plate portion are separated from each other at substantially the center in the left and right longitudinal direction. When the work rotor portion and the flat plate portion are in a deployed state, they are pivotally attached to be vertically foldable via a pivot shaft.
The axis of the pivot shaft of the flat plate portion is set so as to be inclined at a certain angle behind the axis of the pivot shaft of the work rotor portion.

[0006]

With the above construction, the foldable agricultural working machine according to the present invention pivotally attaches the left and right working rotor portions and the leveling plate portion to the central portion so as to be vertically foldable through separate pivot shafts. When the work rotor portion and the leveling plate portion are in the deployed state, the axis of the pivot shaft of the leveling plate portion is set to be inclined backward by a certain angle with respect to the axis of the pivot shaft of the work rotor portion. By doing so, the lifting height of the flat plate portion when the work rotor portion and the flat plate portion are folded is increased, and the tractor can easily move and transport. In addition, since the left and right sides are folded and unfolded in a connected state with respect to the center with respect to the central part, each operation is simplified.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be specifically described below with reference to the accompanying drawings. In FIG. 1 to FIG. 3, reference numeral 1 denotes a scraping harrow (agricultural work machine) which has a long length in the left-right direction of about 3 meters, has a crushing and scraping function, and is configured symmetrically from the center. A front mast 3 connected to a three-point link mechanism (not shown) of the tractor 2 shown in FIG. 5 and a lower link connection part (not shown) that is automatically connected are provided at the front of the substitute harrow 1. Tractor 2
It is attached to the rear part so that it can go up and down. Also, at the same time when the substitute harrow 1 is mounted on the tractor 2, the main body frame is located at the center in the length direction of the substitute harrow 1 from a not-shown PTO shaft of the tractor 2 via a universal joint, a transmission shaft and the like. A transmission mechanism for transmitting power to an input shaft 6 protruding forward from a gear box 5 provided on the front side of the central portion 4 is automatically connected.

In the central portion 4, the power transmitted to the input shaft 6 is shifted by the gear box 5 and transmitted to the rotating shaft projecting horizontally from the lower end of the transmission case 7 through the transmission case 7 on both the left and right sides. The work rotor 8 provided on the rotating shaft is rotated to perform a crushing and scraping operation, that is, a so-called center drive crushing and scraping device is constituted. The upper portion of the work rotor 8 is covered with a shield cover 9, and a rear end of the shield cover 9 is provided with a rotating shaft 11 at a rear end position.
The upper end of the apron 10 to which the leveling plate 11 is pivotally attached via a is rotatably attached via a rotating shaft 10a.

Further, on both left and right sides of the input shaft 6 of the central portion 4, support frames 12a, 12a,
The parts b, 12b and the leveling plate 11 are pivotally connected in a vertically foldable manner via a working unit pivot 13 and a leveling pivot 14, respectively. When the left and right side portions 12 are folded and unfolded, the central portion 4 and the opposing edges of the shield cover 9 and the apron 10 of the left and right side portions 12 are separated from and separated from each other. The shaft is brought into and out of contact by a dog clutch.
Then, as shown in FIGS. 4 and 5, the angle A formed by the axis 13 a of the working unit pivot 13 with respect to a line 6 b orthogonal to the axis 6 a of the input shaft 6 rises by 15 to 35 degrees. It is set to be. By setting the angle A in this way, even if the substitute harrow 1 is lifted most greatly by the three-point link, the folded left and right side portions 12
Does not interfere (contact) with the rear part of the cabin 2a of the tractor 2.

The central portion 4 and the left and right side portions 12, 12
And toggle springs 15 and 15 are interposed therebetween so that the left and right portions 12 and 12 can be held at the developed position and the folded position with respect to the center portion 4, respectively. A rod-shaped fixture 16 for fixing the unfolded state 12 is provided. This fixture 1
A fixed shaft 17 is pivotally connected at one end to a bracket 12b of the left and right side portions 12 via a shaft 16a, and provided with a hook 16b in line with the pivoted position. In contrast, the fixture 16 is disengaged by rotating about the shaft 16a. A fixing portion 16c is provided at the other end of the fixing tool 16, and when the left and right side portions 12 are unfolded, the hook 16b is fixed to the fixed shaft 1.
7 and fixed to the fixed pins 18 protruding from the support frame 12a to fix the left and right side portions 12 in an expanded state. When the left and right side portions 12 are folded, the hook 16b is detached from the fixed shaft 17. In this state, the left and right side portions 12 are fixed to the fixed shaft 17 in a folded state.

As shown in FIGS. 6 and 7, both left and right portions 12, 12 (work rotor portions) with respect to the central portion 4 are shown.
13a of the working unit pivot 13 for folding and unfolding
And the axis 14a of the leveling portion pivot shaft 14, which folds and expands the leveling plate 11 portion, is inclined backward by an angle B (constant angle) when the working rotor portion and the leveling plate portion are in the expanded state. Is set to When the working rotor portion and the leveling plate portion are folded, the axis 14a of the leveling portion pivot shaft 14 is aligned with the working portion pivot shaft 1 as shown by the imaginary line in FIG.
The axis is the same as the axis 13a of No. 3, and the flat plate 11 is folded up by an angle B in a state of being pulled up.

As shown in FIG. 8 and FIG.
The left and right equalizing plates 11 and 11 are unfolded through the equalizing portion pivots 14 and 14 in such a manner that both ends of the equalizing plate 11b at the center portion and side ends of the left and right equalizing plates 11 are folded. When the working state is established, the centering flat plate 11b in the central portion can be operated together with the left and right equalizing plates 11 and 11 into the leveling working state and the soil closing state. An equalizing plate operation mechanism 19 is provided. As shown in FIG. 3, the leveling plate operation mechanism 19 has an operation rod 19a extending to a position where the operator who rides on the tractor 2 on the top of the top mast 3 faces backward and can operate the operation rod. The flattening plate 11b at the center portion is
A state in which the leveling plate 11 is locked in the sloping state, and the leveling operation state is such that the leveling plate 11b and the leveling plate 11 in the central portion can freely rotate up and down around the leveling portion pivot shaft 14. And the switching operation can be performed.

The shield cover 9, the apron 10 and the leveling plate 11 can be folded and unfolded from the central one as described above, and the left and right aprons 10, 10 can be folded. Compression rods 21 and 21 are provided between the shield covers 9 and 9. However, a flat plate is not pivotally attached to the rear end of the apron 10b at the center, but is pivotally attached to the rear end of the shield cover 9a at the center by the rotating shaft 10c. Further, as shown in FIG. 10, a torsion spring 22 for constantly pressing the apron 10b at the center downward is provided. Therefore, the central apron 10b
Is constantly pressed downward at a predetermined pressure during operation.

Brackets 23 are erected on both left and right ends of the left and right equalizing plates 11, and brackets 26 erected on the side equalizing plates 25 by pins 24 are pivotally mounted on the brackets 23. The toggle spring 27 is stretched between the side equalizing plates 25, and the side equalizing plate 25 is
1 and a work position extending horizontally in the horizontal direction.
It can be turned upside down to the storage position where it is turned to the side and stored. An operation wire 28 is connected to the side equalizing plate 25, is inserted into a wire guide 29, extends forward of the fuselage, and enables a worker operating a tractor to raise and lower the equalizing plate 11 between a working position and a storage position. ing.

At the side end portions of the left and right side portions 12, 12, a movable support base 30 to which casters 31 (one of which is not shown) is attached at the front and rear sides is detachably provided by detachable pins 32. The movable support table 30 includes left and right side portions 1.
The scraper harrow 1 which has been deployed and is in the working state is supported so that the working rotor 8 does not touch the ground, and can be moved by the casters 31.

In the substitute harrow 1 having such a structure,
It is attached to the tractor via a three-point link mechanism, and when moving to the field, the left and right portions 12, 12 are folded. When it is introduced into paddy fields to perform crushing and scraping work,
The left and right side portions 12, 12 are developed to a working state and work is performed. The substitute harrow 1 receives power from the tractor 2,
The speed is changed by the gear box 5 and transmitted to the transmission case, and the work rotor 8 is driven to perform the crushing and scraping work. Work row
The soil that has been crushed and scraped by the
The work is guided by the apron 10 and is released to the rear of the work rotor 8, and is leveled by the apron 10 and the leveling plate 11. And when performing the crushing work, the side flat plate 25
When the work is performed in the storage position and the scraping work is performed, the work is performed while the side equalizing plate 25 is switched to the work position or the storage position by the operation wire 28.

When the left and right portions 12, 12 are folded, the angle A between the line 6b orthogonal to the axis 6a of the input shaft 6 and the axis 13a of the working unit pivot 13 is 15 to 3 °.
Since it is set so as to rise backward by 5 degrees, even if the scraper harrow 1 is lifted most by the three-point link, the front part of the folded right and left side portions 12 is the tractor 2.
Does not interfere (contact) with the rear part of the cabin 2a (see FIG. 5). In addition, a toggle spring 15 is interposed between the center portion 4 and the left and right side portions 12 so that the left and right side portions 12 can be held at the developed position and the folded position with respect to the center portion 4. By providing fixing members 16 for fixing the left and right side portions 12 in the expanded state and the folded state respectively, the operation of expanding the left and right side portions 12 in the working state with respect to the central portion 4 or manually folding the center portion 4 upward can be performed. Can be done lightly. In addition, the left and right side portions 12 are stably fixed to the expanded working state and the folded state so that the unfolded left and right side portions 12 are not inadvertently folded when working in a field. It is. Furthermore, it can move stably in the folded state.

The axis 13a of the working part pivot shaft 13 for folding and unfolding the left and right side parts 12 with respect to the central part 4 and the axis 14a of the flat part pivot shaft 14 for folding and unfolding the leveling plate 11 part. When the left and right side portions 12 and the leveling plate 11 are in the unfolded state, they are set to be inclined backward by the angle B. Therefore, when the left and right side portions 12 and the leveling plate 11 are folded, the imaginary line of FIG. As described above, the leveling plate 11 is raised by the angle B so that the axis 14a of the leveling portion pivot shaft 14 is the same as the axis 13a of the working portion pivot shaft 13, so that movement and transportation can be easily performed. Further, since the central flattening plate 11b and the left and right flattening plates 11 are connected by the flattening portion pivot shaft 14, the folding and unfolding operations can be performed easily and easily.

The leveling plate 11 is formed by connecting the both ends of the leveling plate 11b at the center and the side ends of the left and right leveling plates 11 via the leveling portion pivot shaft 14. Pivotally supported between a folded state and an expanded working state,
When in the working state, with respect to the flat plate 11b in the center,
A leveling plate operating mechanism 19 that can be operated in the leveling operation state and the burrowing state is provided together with the left and right leveling plates 11, and the leveling plate operating mechanism 19 is operated to slide the leveling plate 11b and the leveling plate 11 in the central portion. Can be easily switched between the burying state and the leveling work state.

The central apron 10b is pivotally attached to the rear end of the central shield cover 9a by a rotating shaft 10c.
Since the torsion spring 22 that constantly presses the central apron 10b downward is interposed on the rotating shaft 10c, the central apron 10b is constantly pressed downward at a predetermined pressure during work. , There is no need to provide a compression rod, reducing the number of parts,
Weight can be reduced.

At the left and right ends of the left and right equalizing plates 11, there are a work position where the side equalizing plates 25 are extended horizontally outside the equalizing plate 11, and a storage position where the side equalizing plates 25 are turned toward the equalizing plate 11 and stored. It is provided so that it can be turned upside down,
1 enables the operation of raising and lowering the work position and the storage position,
The desired crushing and scraping work can be performed.

[0022]

As described above, according to the foldable agricultural working machine of the present invention, the agricultural working machine is provided with a flat plate at the rear end of the working rotor portion, and at the substantially central portion in the left and right length direction, When the left and right working rotor portions and the equalizing plate portion are pivotally connected to the central portion via separate pivot shafts so as to be vertically foldable, and the working rotor portion and the equalizing plate portion are in an expanded state. Since the axis of the pivot shaft of the flat plate portion is set to be inclined backward by a certain angle with respect to the axis of the pivot shaft of the work rotor portion, the agricultural tractor is mounted on the tractor, and the work rotor is mounted. When the portion and the leveling plate are folded, the leveling height of the leveling plate is increased, so that the tractor can easily move and transport. Further, since the flat plate portion is folded and unfolded with the left and right side portions being connected to the center portion in a connected state, each operation can be easily performed in a short time.

[Brief description of the drawings]

FIG. 1 is a partially omitted plan view of a substitute harrow to which the present invention is applied.

FIG. 2 is a rear view of the same.

FIG. 3 is a side view of the same.

FIG. 4 is a schematic side view in a state where a substitute harrow is folded.

FIG. 5 is a schematic side view in which a substitute harrow in a folded state is mounted on a tractor.

FIG. 6 is a schematic side view showing an angle between an axis of an input shaft of a working rotor portion and an axis of a pivot shaft of a flat plate portion.

FIG. 7 is a schematic side view showing an angle state between the axis of the pivot shaft of the working rotor portion and the axis of the pivot shaft of the leveling plate portion in a state where the substitute harrow is folded.

FIG. 8 is a schematic side view showing a state in which a leveling plate in a central portion is operated between a leveling operation state and a soil closing state.

FIG. 9 is a partial plan view showing a connection state between a leveling plate in a central portion and left and right leveling plates.

FIG. 10 is a schematic side view for explaining the operation of the central apron.

[Explanation of symbols]

1 Scraper harrow (agricultural work machine) 2 Tractor 1a Cabin 3 Top mast 4 Central part 5 Gear box 6 Input shaft 6a Axis 6b Orthogonal line 7 Transmission case 8 Work rotor 9 Shield cover 9a Shield cover at central part 10 Apron 10a, Reference Signs 10c Rotating shaft 10b Apron at center 11 Flat plate 11a Rotating shaft 11b Flat plate at center 12 Left and right sides 12a Support frame 12b
Bracket 13 Working part pivot 13a Axis 14 Leveling part pivot 14a Axis 15, 27 Toggle spring 16 Fixture 16a Axis 16b Hook 16c
Fixing part 17 Fixed shaft 18 Fixed pin 19 Equalizing plate operation mechanism 19a Operation rod 20 Operation rod locking tool 21 Compression rod 22 Torsion spring 23, 26 Bracket 24 Pin 25 Side equalizing plate 28 Operation wire 29 Wire guide 30 Moving support stand 31 Casters 32 Detachable pins A, B Angle

Claims (1)

(57) [Claims] An agricultural work machine which is mounted on a rear portion of a tractor via a three-point link mechanism so as to be able to move up and down and has a long length in the left-right direction. A left and right working rotor portion and a flat plate portion are pivotally attached to the central portion so as to be vertically foldable via separate pivot shafts, respectively, in a substantially central portion in the longitudinal direction of the left and right. Work row
When the rotor portion and the leveling plate portion are in the unfolded state, the axis of the pivoting shaft of the leveling plate portion is set to be inclined backward by a certain angle with respect to the axis of the pivot shaft of the working rotor portion. Foldable agricultural work machine.