JP7220933B2 - Foldable soil crusher - Google Patents

Description

TECHNICAL FIELD The present invention relates to a soil crushing device that is mounted on a traveling vehicle such as a tractor and used for puddling, soil crushing, and the like. More specifically, work such as soil crushing can be performed by a central working body connected to the traveling vehicle at the center and left and right side working bodies that are extended portions on the left and right sides of the central working body. The present invention relates to a collapsible earth crusher that can be folded toward the central working body and traveled. More specifically, in these collapsible earth crushing devices, in the side working body that can be made compact by being folded with respect to the central working body, the ground leveling plate that is attached to the side working body and performs ground leveling work during tillage work, It relates to a mechanism for preventing rotation or sagging in a folded state in which it has been rotated up and down.

A soil crushing device mounted on a traveling vehicle such as a tractor for performing puddling, soil crushing, etc., comprising a central working body and side working bodies positioned on the left and right sides of the central working body. As a foldable earth crusher, Patent Document 1 discloses a foldable earth crusher. This collapsible earth crushing device is characterized by the following: "When the side working body is folded, the contact with the central working body is released, and the regulating locking portion provided in the side second link consisting of a through hole into which the locking rod can be inserted and removed. When the side working body is deployed, the sliding rod is slid in contact with the central working body abutting portion and locked together with the sliding rod. The rod slides out of the regulating locking hole and releases the regulating of the side second link.”

JP 2013-236589 A

In the folding type earth crushing device described in Patent Document 1, when a situation occurs in which the locking rod cannot be inserted into the regulation locking hole of the regulation locking portion due to foreign matter such as mud entering the regulation locking hole. , the second side link cannot be restricted. As a result, there is a problem that the leveling plate connected to the side working body often rotates or hangs down in the folded state.

Therefore, the present invention has been made in view of the above-mentioned problems, and is a folding type machine that can avoid the rotation or drooping state of the ground leveling plate connected to the side working body in the folded state due to the adhesion of foreign matter or the like. It is an object of the present invention to provide an earth crushing device.

In order to achieve the above object, one aspect of the present invention is to provide a first leveling plate that is positioned at the rear portion of a work body that performs earth-breaking work and that is rotatable in the vertical direction; a second ground leveling plate provided rotatably in the direction of the work body; and a guide part having one end rotatably connected to the working body and having an opening in the lower part for guiding the second swing link continuously from the opening. and a second side link having one end rotatably connected to the other end of the side first link and the other end rotatably connected to the second leveling plate. , the guide part is a collapsible soil crusher including a regulation range for regulating rotation of the first side link and a regulation releasing range for allowing rotation of the first side link. .

According to the present invention, it is possible to provide a folding earth crushing apparatus that can avoid the rotation or drooping state of the ground leveling plate connected to the side working body in the folded state due to adhesion of foreign matter or the like.

FIG. 2 is a rear view of a state in which the side working body of the collapsible soil crushing device according to the embodiment of the present invention is deployed in a working state; FIG. 2 is a rear view of the foldable soil crushing apparatus according to the embodiment of the present invention in which the side working body is in a folded state; FIG. 2 is a side view of a state in which the side working body of the embodiment is deployed in a working state; FIG. 2 is a side view of a state in which the side working body of the embodiment is unfolded in a folded state; 1, which is a side view of a main part showing a cross section of the central working body of the embodiment; FIG. 1 is a cross-sectional explanatory view taken along the line BB of FIG. Drive transmission diagram of the embodiment Enlarged rear view explanatory view of the vicinity of the folding part and the side leveling plate link mechanism in the unfolded state of the embodiment Enlarged plan view explanatory view of the vicinity of the folding part and the side leveling plate link mechanism in the unfolded state of the embodiment FIG. 3 is an explanatory view of the side first leveling plate fixing mechanism in the unfolded state of the embodiment, as viewed from arrow C in FIG. An explanatory view of the embodiment viewed from arrow C in FIG. 3 in an intermediate state between the unfolded state and the folded state. FIG. 3 is an explanatory view of the side first leveling plate fixing mechanism in the folded state of the embodiment, as viewed from arrow C in FIG. FIG. 1 is an enlarged side explanatory view of the central leveling plate link mechanism of the embodiment taken along line AA of FIG. 1; FIG. 1 is an enlarged side explanatory view of the side leveling plate link mechanism of the embodiment taken along line DD in FIG. 1; FIG. 1 is an enlarged side explanatory view of the side leveling plate link mechanism of the embodiment, taken along the line BB in FIG. 1; 1, which is a main part side view showing a cross section of the central working body of the embodiment in an earthing state; 1, which is a side view of a main part showing a cross section of the side working body of the embodiment in a shoveling state; FIG. 2 is an explanatory cross-sectional view taken along the line EE of FIG. 2, showing a main part side view of the embodiment with the side working bodies in the folded state and the central working body in the shoveling state, with the plate material 62a removed; FIG. 2 is an explanatory cross-sectional view taken along the line EE of FIG. 2, showing a main part side view of the embodiment with the side working bodies in the folded state and the central working body in the soil crushing state, with the plate member 62a removed.

An embodiment of the present invention will now be described with reference to the drawings. In the following description of the drawings, the same or similar parts may be given the same or similar reference numerals. However, the drawings are schematic, and the relationship with the dimensions of each part may differ from the actual one. In the description, the left side shown in FIG. 1 is the left side in the direction of travel, the right side is the right side in the direction of travel, the left side shown in FIG. 3 is the front side in the direction of travel, and the right side is the rear side in the direction of travel.
Also, the technical idea of the present invention can be modified in various ways within the technical scope defined by the claims.

As shown in FIG. 1, the collapsible soil crusher is composed of three parts: a central working body 1 and left and right side working bodies 2L and 2R extending the working width of the central working body 1 to the left and right. The left and right side working bodies 2L and 2R are rotatably connected at the ends of the central working body 1, and are folded upward of the central working body 1 by rotating upward.
A folding portion 3 is formed by folding the central working body 1 and the side working bodies 2L and 2R positioned on the left and right sides thereof. It is

As shown in FIG. 7, the central working body 1 has a central earth crushing rotary 10 and a pipe-shaped center frame 11 provided in the left-right direction. The central soil crushing rotary 10 has a central rotating shaft 10a and a plurality of soil crushing claws 10b extending radially from the central rotating shaft 10a. The center frame 11 has an input case 12 having an input shaft 12a facing forward at the center. The input shaft 12 a can receive power from a tractor or the like positioned in front of the central working body 1 . Furthermore, a mounting frame 19 is provided around the input case 12 . The mounting frame 19 has a top mast 19 a above the input case 12 and lower pins 19 b provided on both sides of the input case 12 . The top mast 19a and the lower pin 19b are connected to a three-point link mechanism (not shown) of the tractor so as to be movable up and down. be. The input shaft 12a is connected to an output shaft 11a provided in the center frame 11 through a bevel gear 12b inside the input case 12 so as to be able to transmit received power.

As shown in FIG. 7, a transmission chain case 13 is provided on one side of the center frame 11 . Inside the transmission chain case 13, there are provided a sprocket 13a provided at the end of the output shaft 11a, a sprocket 13b provided at the end of the central rotary shaft 10a, and a roller chain 13c that spans the sprockets 13a and 13b and performs power transmission. As a result, the power received from the input shaft 12a can be transmitted as rotational power to the central rotary shaft 10a of the central earth crushing rotary 10 via the sprocket 13a, the roller chain 13c, and the sprocket 13b. The central working body 1 crushes the soil with a large number of soil crushing claws 10b provided on the central rotating shaft 10a along the circumference width direction.

As shown in FIGS. 4 and 7, central clutch pawls 14 are provided at both left and right ends of the central rotating shaft 10a. Taking the left side as an example, the center side clutch pawl 14 is connected to the side clutch pawl 20b provided at the end of the side rotating shaft 20a of the left side working body 2L when the left side working body 2L is in the unfolded state. The power of the central rotating shaft 10a is transmitted to the left working body 2L. Similarly, the central side clutch pawl 14 provided at the right end of the central rotating shaft 10a transmits power to the right side working body 2R. 4 shows the state in which the side working body 2 is folded upward, so the central side clutch pawl 14 is visible, but is not visible from the side when the side working body 2 is unfolded as shown in FIG. The details of the side working body 2, the side rotating shaft 20a, and the side clutch pawl 20b will be described later.

Above the central crushed soil rotary 10, as shown in FIGS. 4 and 5, a central rotary upper surface cover 15 is provided. At the rear end side of the central rotary top cover 15, there is provided a central first leveling plate 16 which can be vertically rotated about a first leveling plate rotating shaft 16a which is also arranged at the rear end side of the central rotary top cover 15. is provided. A second center leveling plate 17 is attached to the rear end side (or the lower end side) of the first center leveling plate 16 so as to be vertically rotatable via a second second leveling plate rotating shaft 17a. A rake 16 c is provided on the central side rotary 10 side from the first central leveling plate 16 . In this embodiment, the rakes 16c are arranged in a row at regular intervals in the horizontal direction. One end of the second central link 18b is rotatably connected to the upper surface of the second central leveling plate 17, and the other end of the second central link 18b is connected to one end of the first central link 18a. Further, the other end of the central first link 18a is connected to the central working body 1 main body. A central ground leveling plate link mechanism 180 is composed of the first center leveling plate 16, the second center leveling plate 17, the second center link 18b, and the first center link 18a.

A protruding portion protruding downward in a triangular shape is provided in the vicinity of the central portion in the front-rear direction of the central first link 18a. A notch portion which is open downward is formed upward and rearward on the forward side of the projecting portion in the traveling direction. This cutout portion functions as a central guide portion 181 and regulates and releases the rotation of the central leveling plate by linking with a central link regulating means 180 which will be described later. The center guide portion 181 is an L-shaped notch groove that is bent like a crank, and the groove formed upward from the bottom of the first center link 18a is formed so as to be bent rearward in the middle. . The center guide portion 181 is provided with a restriction release range 18c that allows the first center link 18a to rotate, and a restriction range 18d that prevents the first center link 18a from rotating.

The restriction range 18d is provided in the rearward depth of the L-shaped cutout groove shown in FIG. Rotation of the central first link 18a is blocked by the edge 18e, and rotation is restricted. When the rotation of the central first link 18a is restricted, the rotation of the first central leveling plate 16 and the second central leveling plate 17 is restricted, and they cannot rotate.
The restriction releasing range 18c is provided near the opening of the L-shaped cutout groove shown in FIG. Since the end edge 18e that restricts movement is not in a position that restricts rotation, rotation of the central first link 18a is not restricted. When the regulation of rotation of the central first link 18a is released, vertical movement becomes possible. A central link restricting means 182 is positioned in the vicinity of the first central link 18a to restrict and release the rotation of the first central link 18a.

As shown in FIGS. 1, 5, and 13, the central link restricting means 182 has vertically long plate members arranged so as to sandwich the first central link 18a between the plate surfaces, and the plate members are arranged so as to bridge the respective plate members. It is attached by connecting with a stick. A bar positioned at the lower end in the longitudinal direction of the plate is rotatably connected to the main body of the central working body 1, and the upper side of the other end is rotatably provided so as to be positioned at the central guide portion 181. As shown in FIG. By positioning the upper side of the other end in the regulation release range 18c or the regulation range 18d of the central guide portion 181, the rotation of the central first link 18a can be regulated and released.

Furthermore, an actuator 183 is provided to enable the central link restricting means 182 to be driven. The actuator 183 is a member that can expand and contract in the longitudinal direction, and can rotate the first central link 18a by expanding and contracting. One end of the actuator 183 is rotatably connected to the upper surface cover of the central rotary, and the other end is connected to a bar on the upper end side of the central link restricting means 182 . In this embodiment to be described, a hydraulic cylinder is used, and is piped (not shown) receiving hydraulic pressure from a traveling body (not shown) that is positioned in front of the folding type earth crushing device of the present invention and travels. It is possible to expand and contract.

The extension of the actuator 183 pushes the central link restricting means 182 rearward and rotates the central link restricting means 182 rearward. The central link restricting means 182 rotated rearward moves the central guide portion 181 to bring the first central link 18a into the rotation restricting state. In this state, the first center leveling plate 16 and the second center leveling plate 17 are fixed and cannot be rotated.
On the contrary, by shortening the actuator 183, the bar 62d rotates the central link restricting means 182 forward. Since the upper bar member of the center link restricting means 182 that has rotated forward moves to the opening of the center guide portion 181, the first center link 18a is ready to rotate. In this state, the first central leveling plate 16 and the second central leveling plate 17 are rotatable, and the leveling work of leveling the mud crushed by the central soil crushing rotary 10 is possible.

Now, as shown in FIG. 7, the left and right side working bodies 2L and 2R are provided on the left and right sides of the central working body 1, respectively. is rotatably provided, and a side crushing rotary 20 corresponding to the central crushing rotary 10 of the central working body 1 is provided on the side rotating shaft 20a. The side earth-breaking rotary 20 has a plurality of earth-breaking claws 10b arranged radially on a side rotating shaft 20a, and rotates to crush soil. A side rotary upper surface cover 21 corresponding to the central rotary front cover 15 of the central working body 1 is provided above the side crushing rotary 20 . A side clutch pawl 20b is provided at the end of the side rotating shaft 20a on the side of the central working body 1, and by meshing with the central side clutch pawl 14, the side crushing rotary 20 is moved to the center of the central working body 1. Rotational driving is possible by obtaining power from the rotary shaft 10a. Therefore, the left and right side working bodies 2L and 2R serve as working bodies that extend the central working body 1 and exert a soil crushing function.

In FIGS. 3 and 6, the rear end side of the side rotary upper surface cover 21 is provided with the side first leveling plate 22 which is vertically rotatable via the first side leveling plate rotating shaft 22a. . A second side leveling plate 23 is positioned on the rear edge (or the bottom side) of the first side leveling plate 22 and is connected to the first side leveling plate 22 so as to be vertically rotatable. A rake 22 b is provided on the side first leveling plate 22 on the side of the side soil crushing rotary 20 , like the first central leveling plate 16 . In this embodiment, the rakes 22b are provided in only one row at regular intervals in the horizontal direction. The second side ground leveling plate 23 is connected to the main body of the side working bodies 2L and 2R via the second side link 51 and the first side link 50 on its upper surface. The side second ground plate 23 , the side second link 51 and the side first link 50 constitute the side ground plate link mechanism 5 . One end of the second side link 51 is provided on the upper surface of the second side leveling plate 23 so as to be rotatable in the front-rear direction. is rotatably mounted. The first side leveling plate 22 and the second side leveling plate 23 are rotated in conjunction with each other by the side leveling plate link mechanism 5, and can be positioned appropriately during tillage work. Details of the side leveling plate link mechanism 5 will be described later.

As shown in FIGS. 1, 8 and 9, a folding part 3 is positioned at the folded portion of the central working body 1 and the side working bodies 2L and 2R. In the folding part 3, there is a folding mechanism that rotatably connects a side working body rotating frame 31 provided on the side working bodies 2L and 2R and a central working body rotating frame 32 provided on the central working body 1. A pivot shaft 30 is provided. Each of the side working bodies 2L and 2R is folded 180 degrees above the central working body 1 around the folding rotary shaft 30. As shown in FIG.
When the central working body 1 and the side working bodies 2L and 2R are rotated, the central working body 1 and the side working bodies 2L and 2R are rotated by the central working body 1 and the side working bodies 2L and 2R. It consists of a rigid body that does not distort. In this embodiment, the side working body rotating frame 31 is composed of two parallel plate-like bodies facing each other, and the central working body rotating frame 32 is composed of a rectangular tube having a U-shaped cross section with an open bottom surface. .

As shown in FIGS. 10 to 12, a side first leveling plate fixing mechanism 4 is provided in the vicinity of the folding section 3. As shown in FIGS. 1 and 8, the first side leveling plate fixing mechanism 4 has a stopper arm rotating shaft 40 attached to each side working body rotating frame 31 of each of the side working bodies 2L and 2R. set up. Further, a stopper arm 41 is provided on the stopper arm rotating shaft 40 so as to be biased to rotate toward each side working body by an arm torsion spring 44 . The stopper arm 41 is formed of a deformed L-shaped plate-like body, an intermediate portion of which is rotatably attached to the stopper arm rotating shaft 40, and an end portion of which is on the side of the side working body 2 that is L-shaped and perpendicular to the rear. to form a side end portion 41a, and the other end forms a center side end portion 41b.
An arm torsion spring 44 is provided so that both ends are supported by the stopper arm 41 and the stopper arm rotating shaft 40 . The arm torsion spring 44 urges the stopper arm 41 rotatable about the stopper arm rotating shaft 40 in the direction of arrow R shown in FIGS. 10 to 12 .
The side first leveling plate fixing mechanism 4 has a first leveling plate locking projection 42 projecting from the upper surface of each side first leveling plate 22 , and is attached to the central working body rotating frame 32 of the central working body 1 . It has a stopper arm rotation check projection 43 provided.

When the side working bodies 2L and 2R begin to shift from the unfolded state to the folded state, the first leveling plate locking projection 42 is in a state where the center side end portion 41b of the stopper arm 41 abuts against the pivot restraint projection 43. The first leveling plate locking projection 42 approaches the end portion 41a on the continuous side portion side. The stopper arm 41 is rotated by the biasing force of the arm torsion spring 44 .
As the rotating movement of the side working body 2 progresses, the position of the side end 41a of the stopper arm 41 is also moved along with the rotation, and eventually the side end bent rearward into an L shape at right angles. The portion 41a and the contact locking surface 42a are positioned to face each other. As a result, the first side leveling plate 22 is restricted from rotating upward in FIGS. In this state, even if the side working bodies 2L and 2R are further shifted to the folded state and rotated, the upward rotation of the side first leveling plate 22 is restricted.

As shown in FIGS. 10 to 12, the central side end portion 41b of the stopper arm 41 extends from the unfolded state to the folded state of the side working body 2L (or from the middle of the unfolded state to the unfolded state). ) are brought into contact with a stopper arm rotation restraining protrusion 43 provided on the central working body rotating frame 32 by the biasing force of the arm torsion spring 44 and are locked.
Therefore, when the stopper arm 41 is deployed, the stopper arm 41 is locked and prevented from rotating in the direction of the arrow R. It is stopped in an irrelevant state.

When the side working bodies 2L and 2R are deployed in this way, as shown in FIG. Rotation in the R direction is in a restrained state. In this state, the first side leveling plate 22 is in a state in which the locking between the stopper arm 41 and the first leveling plate locking projection 42 is released. It is in a rotatable state in the vertical direction with respect to the upper surface cover 21 . In this state, crushing work is carried out.

Next, as shown in FIGS. 11 and 12, when the side working bodies 2L and 2R begin to rotate around the folding rotation shaft 30 and shift from the unfolded state to the folded state, the stopper arm rotates. The positions of the shaft 40, the stopper arm 41, and the first leveling plate locking projection 42 are moved, and the side end 41a of the stopper arm 41 comes to a position where it abuts the first leveling plate locking projection 42, and the stopper The locking position between the center side end portion 41b of the arm 41 and the stopper arm rotation check projection 43 changes.
From the state shown in FIG. 11 to the state shown in FIG. 12 in which the side working bodies 2L and 2R are in the folded state, the side end 41a of the stopper arm 41 moves as the first leveling plate locking projection 42 rotates. The urging force of the arm torsion spring 44 rotates until it abuts on the side of the first side leveling plate 22 . Upon contact, the center side end 41b begins to move away from the stopper arm pivot restraining projection 43. As shown in FIG.

When the side working bodies 2L and 2R are folded by 180 degrees as shown in FIG. 12, the center side end 41b of the stopper arm 41 is released from the engagement with the stopper arm rotation check projection 43. state.
In this state, the side end 41a of the stopper arm 41 comes into contact with the first leveling plate locking projection 42 of the first side leveling plate 22 due to the rotational bias of the arm torsion spring 44 in the direction of arrow R. Since it stops at the position, it is reliably locked by the first leveling plate locking projection 42 . As a result, the first side leveling plates 22 are restrained from rotating downward with respect to the side rotary upper surface cover 21 .

The details of the side leveling plate link mechanism 5 will be described. As shown in FIGS. 3 and 6 , the side leveling plate link mechanism 5 is configured by the side first leveling plate 22 , the side second leveling plate 23 , the side second link 51 , and the side first link 50 . It is configured. The side first leveling plate 22 and the side first link 50 connected to the body of the side working body 2 are rotatably connected by the side leveling plate link mechanism 5 with their respective front sides as the center of rotation. ing.
The first side link 50 is arranged such that the front end 50a is sandwiched between mounting plates 52a and 52b, which are vertically aligned on the main body of the side working body 2. They are rotatably connected. The second side link 51 is positioned at the rear end 50b of the first side link 50, and is rotatably connected to the upper end 51a of the second side link 51 via a pivot pin 510. It is A lower end portion 51b of the second side link 51 is rotatably connected to the upper surface of the second side leveling plate 23 . During tillage work, the first side leveling board 22 and the second side leveling board 23 can move up and down in conjunction with each other via the first side link 50 and the second side link 51 . The angle of the second side leveling plate 23 is controlled so as to be as horizontal as possible with respect to the tillage work surface.

Near the central portion of the first side link 50 in the front-rear direction, there is provided a projecting portion projecting downward in a triangular shape. A notch portion which is open downward is formed upward and rearward on the forward side of the projecting portion in the traveling direction. This cutout portion functions as a guide portion 50c and regulates and releases the rotation of the leveling plate by linking with the side link regulation means 6, which will be described later. The guide portion 50c has a U-shaped groove that is bent like a crank, and the U-shaped groove formed from the lower side of the first side link 50 is formed in an L-shape so as to be bent rearward in the middle. The guide portion 50c has a restriction release range 50d that allows rotation and a restriction range 50e that disables rotation of the first side link 50, depending on the location of the side link restriction means 6, which will be described later. is provided. When the rotation of the first side link 50 is restricted, the first side leveling plate 22 and the second side leveling board 23 are fixed and cannot move up and down. Further, when the regulation of rotation of the side first link 50 is released, vertical movement becomes possible. A side link restricting means 6 is positioned in the vicinity of the first side link 50 to restrict and release the rotation of the first side link 50 . Further, since one end of the guide portion 50c is open downward, even if a foreign object enters, it can be easily dropped, and the operation of the side link regulating means 6, which will be described later, is not hindered.

As shown in FIGS. 1, 3, 8 and 9, the side link restricting means 6 is positioned on the side of the side first link 50 and the side first swing link 61 is positioned on the side. A second swing link 62 , an actuator 63 and an elastic body 64 are provided.
The first side swing link 61 is erected side by side with the mounting plate 52b on the main body of the side working body 2 connecting the front end 50a and the mounting plate 52b on the opposite side of the mounting plate 52a. They are arranged so as to sandwich the mounting plate 52c, and are connected so as to be rotatable in the front-rear direction. To the first side swing link 61, two bars 61c and 61d provided in parallel in the left-right direction are fixed so as to bridge the front and rear ends of two plate members 61a and 61b that are long in the front-rear direction. It is The bar 61c arranged on the rear side of the plate members 61a and 61b is inserted into the side first swing link fulcrum hole 52d provided in the central portion of the mounting plate 52b and the front side of the mounting plate 52c. It functions as a fulcrum shaft for rotating the first side swing link 61 in the front-rear direction. The rod member 61d arranged on the front side of the plate members 61a and 61b contacts with the recessed receiving portion 52e provided on the upper end portion on the front side of the mounting plates 52b and 52c, thereby causing the first side swing link to move. The downward rotation of 61 is blocked.

The second side rocking link 62 is arranged on the rear side of the first side rocking link 61, and is connected so as to be rotatable in the front-rear direction. The second side swing link 62 includes a mounting plate 52b and plate members 62a and 62b that are long in the vertical direction so as to sandwich the mounting plate 52a. A bar 62c serving as a pivot shaft and a bar 62d are fixed to the upper ends of the plate members 62a and 62b in parallel in the horizontal direction so as to bridge the plate members 62a and 62b.

The bars 62c and 62d of the second side swing link 62 are positioned below the first side link 50, and the bar 62d is positioned in the guide portion 50c provided on the first side link 50. By doing so, it is possible to regulate and release the rotation of the side first link 50 . More specifically, when the bar 62d is positioned in the regulation release range 50d set near the opening of the guide portion 50c, the lower portion of the opening is released, so that the bar 62d moves the guide portion. The first side link 50 can be rotated upward without locking with 50c. Conversely, when the bar 62d is positioned in the regulation range 50e set in the inner part of the guide part 50c, the locking part 50f formed below the regulation range 50e is locked by the bar 62d, and the lateral The rotation of the first link 50 is restricted.

14 to 19, in the vicinity of the boundary between the regulation release range 50d and the regulation range 50e of the notch edge of the guide part 50c shown in Figs. 53 are provided. The distance between the apex 53a of the projecting portion 53 and the upper edge 50g of the L-shaped crank groove provided in the guide portion 50c has a gap through which the rod 62d can pass. Since the first side link 50 in the unfolded state hangs down due to its own weight, the second side swing link 62 does not get caught on the protrusion 53 and can be moved between the restriction release range 50d and the restriction range 50e. It is possible to move.
If the second side swing link 62 is moved from the restriction range 50e to the restriction release range 50d, the first side swing link 62 is moved so that the protrusion 53 interferes with the bar 62d of the second side swing link 62. When the link 50 is lifted, the rotation of the side second swing link 62 is blocked. The action and effect of the projecting portion 53 are exhibited when the side working body 2, which will be described later, is in a folded state.

An actuator 63 is provided so as to connect the bar 61d of the first side swing link 61 and the bar 62d of the second side swing link 62, and is rotatable. The actuator 63 is a member that can expand and contract in the longitudinal direction, and can rotate the first side swing link 61 and the second side swing link 62 by expanding and contracting. In this embodiment to be described, hydraulic cylinders are used, and hydraulic pressure is distributed and piped (not shown) from a traveling body (not shown) that is positioned in front of the folding soil crusher of the present invention and travels. It is possible to expand and contract. The rod member 62d connected to the actuator 63 is provided longer than the length of the connecting portion with the actuator 63, and the side adjacent to the actuator 63 is not provided with any member or the like. The first side link 50 is positioned in a portion where this member or the like is not provided, and the first side link 50 is restricted or released from rotation by contact between the bar member 62d and the guide portion 50c.

The actuator 63 extends with the bar 61d as a fulcrum shaft to push the bar 62d rearward and rotate the side second swing link 62 rearward. In the second side swing link 62 that has been rotated rearward, the first side link 50 is rotated as the bar 62d moves along the guide portion 50c so that the bar 62d is positioned within the restriction range 50e. put it into motion control. In this state, the first side leveling plate 22 and the second side leveling board 23 are fixed and cannot be rotated.
On the contrary, by shortening the actuator 63 with the bar 61d as a fulcrum shaft, the bar 62d is pulled forward and the side second swing link 62 is rotated forward. As the bar 62d of the second side swing link 62 pivoted forward moves along the guide portion 50c, the bar 62d is positioned within the restriction release range 50d, and the first side link 50 is moved. Make it rotatable. In this state, the first side leveling plate 22 and the second side leveling plate 23 are rotatable, and the leveling work of leveling the mud crushed by the side crushing rotary 20 is possible.

An elastic body 64 is provided on the plate member 61 a positioned on the first side link 50 side of the first side swing link 61 . Although a tension spring is used as the elastic body 64 in this embodiment, the form of the elastic body does not matter as long as it can be urged in the contracting direction. One end of the elastic body 64 is hooked on a hooking member 61e provided on the plate member 61a, and the other end is hooked on a hooking member 52f provided on the mounting plate 52b on the side rotary top cover 21. FIG. An imaginary line 64a connected by hooking the elastic body 64 on the hooking members 52f, 61e in the working state of the side leveling plates 22, 23 shown in FIGS. It is positioned below the bar 61c that is the shaft. As a result, the first swing link 61 is always biased downward, and the first swing link 61 is prevented from rotating unexpectedly. Since the elastic body 64 allows the first side rocking link 61 to stably hold a fixed position, the side leveling plates 22 and 23 can be stably rotated, and stable leveling work is possible. do.

Next, the operation of the side leveling plate link mechanism 5 and the side link restricting means 6 of the folding soil crusher of the present invention will be described. The process from the unfolded state to the folded state for the right side working body 2R in the forward direction of the tractor is the same as the process for the left side working body 2L, although the left and right sides are different. The left side working body 2L is taken as an example.

FIG. 10 shows a state in which the left side working body 2L is deployed. In the unfolded state, the central end 41b of the stopper arm 41 of the first side leveling plate fixing mechanism 4 is engaged with the stopper arm rotation restraining protrusion 43, so that the rotation in the direction of the arrow R is restrained. The first side leveling plate 22 is in a state in which the stopper arm 41 and the first leveling plate locking projection 42 are released. Therefore, each side first leveling plate 22 is vertically rotatable with respect to the side rotary upper surface cover 21 .
Furthermore, the central first leveling plate 16, the central second leveling board 17, the side first leveling board 22, and the side side second leveling board 23 are configured such that the center link restricting means 182 is within the rotation restriction releasing range of the first center link 18a. , and the second side swing link 62 is positioned in the rotation restriction release range 50d of the first side link 50, the rotatable state is established. In this state, soil crushing work is performed, and the mud is leveled by moving each leveling board up and down so as to follow the surface of the paper.

The first center leveling board 16, the second center leveling board 17, the first side leveling board 22, and the second side leveling board 23 are set in a rotation-restricted state, and each leveling board is set in a fixed state. becomes possible. The earth gathering work is a work of forcibly gathering mud on the portions of each fixed leveling plate facing the central earth crushing rotary 10 side and the side earth crushing rotary 20 side. The shift from soil crushing work to earth gathering work in the deployed state is performed by extending the actuator 183 on the central working body 1 and the actuator 63 on the side working body 2 . In this embodiment, the central and side actuators 183, 63 are hydraulically controlled by a control valve 184 and simultaneously extend and retract. Rather than operating the actuators 183 and 63 individually, the actuators 183 and 63 are collectively operated by one operation unit (not shown), thereby improving operability for the operator. is possible.

A description will be given of the transition operation from the crushing work state to the earth gathering work state in the deployed state.
The central link restricting means 182 of the central working body 1 moves along the central guide portion 181 due to the extension of the actuator 183, and begins to reach the restricting range 18d shown in FIG. Then, the central link restricting means 182 moves the central guide portion 181, thereby gradually rotating the second central leveling plate 17 downward. When the central link restricting means 182 completely reaches the restricting range 18d of the central guide portion 181, the second central leveling plate 17 stops rotating downward. Then, the state shown in FIG. 16 is obtained, and the rotation of the first central leveling plate 16 and the second central leveling plate 17 is restricted via the second center link 18b. In addition, the second central leveling plate 17 in the earthing work state as viewed from the side is set at a position such that the first central leveling plate 16 is extended downward.

Likewise, the second side swing link 62 of the side working body 2 moves along the guide portion 50c due to the extension of the actuator 63, and begins to reach the restriction range 50e from the restriction release range 50d. At this time, the guide portion 50c has an opening directed downward to allow foreign matter to drop downward, and the inside of the guide portion 50c is kept clean. Then, the second side rocking link 62 moves in the guide portion 50c, and the second side leveling plate 23 gradually rotates downward. When the second side swing link 62 completely reaches the regulation range 50e of the guide portion 50c, the downward rotation of the second side leveling plate 23 stops. Then, the state shown in FIG. 17 is obtained, and the rotation of the first side leveling plate 22 and the second side leveling board 23 is restricted via the second side link 51 . Further, the side second leveling board 23 in the earthing work state as viewed from the side is set at a position where the side part first leveling board 22 is extended downward.

The transition operation from the shoveling work state to the shoveling work state in the unfolded state is performed by performing the reverse procedure of the transition operation from the shoveling work state to the shoveling work state.

A transition operation from the unfolded state to the folded state will be described.
When the side working body 2 is rotated to be folded upwardly of the central working body 1, each leveling board is moved to the shoveling work state.

As shown in FIGS. 10 and 11, when the side first leveling plate fixing mechanism 4 starts to shift the side working body 2L (left side) from the unfolded state to the folded state, the side working body 2L is rotated. The operation body rotating frame 31 starts rotating around the folding rotating shaft 30, and the positions of the stopper arm rotating shaft 40, the stopper arm 41, and the first leveling plate locking protrusion 42 start to move.
Although this rotation does not change the relative position between the stopper arm rotation shaft 40 and the first leveling plate locking projection 42, the stopper arm 41 does not rotate at its central end 41b. The position and posture change due to engagement with 43 .
12 by rotating the side working body 2L about the folding rotation shaft 30, the side end 41a of the stopper arm 41 comes into contact with the first leveling plate locking projection 42. Along with the change, the locking position between the center side end portion 41b of the stopper arm 41 and the stopper arm rotation check protrusion 43 also changes.

10 to 12 showing the positional relationship between the side working body 2 and the central working body 1 at this time.
When the side working body 2 is to be folded upward from the unfolded state shown in FIG. 10 to the central working body 1 shown in FIG. 12, the folding rotary shaft 30 is rotated as shown in FIG. Since it rotates about the center, the central working body 1 and the side working body 2 are gradually separated from each other.
In the first side leveling plate fixing mechanism 4, when the side working body 2 is folded as it is and turned 180 degrees as shown in FIG. The arm rotation restraining projection 43 is completely disengaged and the side end 41a is turned to the side by the arm torsion spring 44 biased in the direction of the arrow R. It is locked with the first leveling plate locking projection 42 of the first leveling plate 22 . Due to this locking, the first side leveling plates 22 are restricted from rotating downward with respect to the side rotary upper surface cover 21 .

Furthermore, since the first side leveling plate 22 and the second side leveling board 23 are still in the state where the rotation of the first side link is restricted (earth dumping work state), the side working body 2 is folded. The relative posture and position with respect to the side rotary top cover 21 remains maintained during the transition and after the folding operation is completed. Since the side working body 2 is constructed in this manner, the first side leveling board 22 and the second side leveling board 23 in the folded state do not rotate unexpectedly or hang down. Since the first side leveling board 22 and the second side leveling board 23 of the collapsible soil crushing device are not moved by the running body, the machine can run with improved safety.
The first side leveling plate fixing mechanism 4 and the side leveling plate link mechanism 5 hold the first side leveling plate 22 and the second side leveling plate 23 during the folding operation with respect to the side rotary upper surface cover 21 . It does not move because it maintains its relative position and posture. That is, since only the parts related to the folding operation move, the folding operation can be performed more safely.

Next, the case where the side working body 2 is in a folded state and the central working body 1 alone is used to perform earth breaking work and earth gathering work will be described. By folding the folding type earth crushing device of the present invention, it is possible to perform earth crushing work and earth gathering work only with the central working body 1 even in a place where the horizontal width in the traveling direction is narrow.
The central second leveling board 17 and the side second leveling board 23 immediately after the completion of the transition from the unfolded state to the folded state are in the earthing work state. That is, the first center leveling plate 16 and the second center leveling plate 17, and the first side leveling board 22 and the second side leveling board 23 are in a state in which rotation is restricted. In this state, the central working body 1 cannot perform soil crushing work, so it is necessary to release the restriction on the rotation of the first central leveling plate 16 and the second central leveling plate 17 .

The regulation of the rotation of the first central leveling plate 16 and the second central leveling plate 17 is released by operating the operating portion (not shown) to retract the actuator 183 via the control valve 184 as described above, thereby bringing the earth gathering work state into effect. to the crushing work state. At this time, the actuator 63 of the side working body 2 is also retracted at the same time. In this state, the second side leveling plate 23 will be in a rotatable state. The protrusion 53 is used to prevent this.

FIG. 18 shows the side link mechanism 5 and the side link restricting means 6 immediately after completing the transition to the folded state. In this state, the bar 62d of the second side rocking link is positioned within the regulation range 50e of the guide portion 50c, and the central working body 1 and the side working body 2 are in the shoveling work state. In the folded state, the side working body 2 is upside down compared to the earth crushing state, so the first side leveling board 22, the second side leveling board 23, and the second side link 51 are arranged. 18, the rear end portion 50b of the first side link 50 is subjected to a load in the direction away from the first side leveling plate 22, that is, in the forward rotation direction in FIG. At this time, the second swing link 51 is in the regulation range 50e, and the actuator 63 is applying a load in a tensioning direction. Furthermore, the bar 62 d is hooked on the projecting portion 53 .

In this state, when the central working body 1 is placed in the soil crushing state, the actuator 183 starts shortening and the actuator 63 also starts shortening at the same time. Then, since the bar 62d connected to the actuator 63 is hooked on the protrusion 53, the second side rocking link 62 tries to maintain its posture. Then, as shown in FIG. 19, the actuator 63 continues to shorten, so that the first side swing link 61 rotates around the bar 61c, which is the fulcrum shaft, in the illustrated rotation direction S, i.e., as shown in FIG. , in a direction away from the side rotary top cover 21 . The first side rocking link 61 comes into contact with the front end 50a of the first side link 50 and stops rotating, and maintains that posture.

The rotational torque of the first side swing link 61 generated by the compression of the actuator 63 is larger than the biasing force of the elastic body 64 pressing the side rotary top cover 21 side. Rotation is possible.
When the compression of the actuator 63 is completed, the rotation of the side first swing link 61 also stops. At this time, an imaginary line 64a formed by the hooking members 52f and 62e of the elastic body 64 is in a state where it has crossed over the rotation fulcrum axis of the bar 61c. Therefore, the biasing force of the elastic body 64 works in a direction to separate the first side swing link 61 from the side rotary upper surface cover 21 . Since this urging force presses the actuator 63 against the rear end 50b of the first side link 50, the second side swing link 62 is further held within the restriction range 50e. As a result, even when the central working body 1 is folded from the mulching state to the soil crushing state, the side first leveling plate 22 and the side second leveling plate 23 of the side working body 2 maintain their rotation regulation. can. In the folded state, the direction in which the elastic body is urged by the first side swing link is different between the shoveling state and the soil crushing state.

A description will be given of a case where the central working body 1 is changed from the crushing work state to the earth gathering work state in the folded state. When the actuator 183 is extended in the extension direction, the center leveling plate link mechanism 180 moves the first center link 18a from the restriction release range 18c to the restriction range 18d, and the rotation of the first center link 18a is restricted.
At the same time, the actuator 63 of the side working body 2 also extends. At this time, the actuator 63 shown in FIG. 19 presses the rear side end portion 50b of the first side link 50 via the second side swing link 62 . Then, the actuator 63 extends while maintaining the posture of the side first link 50, so that the side first swing link 61 is rotated in the direction opposite to the illustrated rotation direction S. As shown in FIG. The first side swing link 61 stops rotating when the bar 61d comes into contact with the receiving portion 52e of the mounting plate 52c. At this time, the actuator 63 extends while maintaining the position of the second side swing link 62 within the regulation range 50e of the first side link 50. Therefore, the first side link 50 is rotated remain regulated. That is, the first side ground leveling plate 22 and the second side leveling board 23 remain restricted in their rotation.

In addition, since the virtual line 64a of the elastic body 64 is in a state in which the bar member 61c, which is the fulcrum shaft of the first side swing link 61, is crossed in a side view, the first side swing link 61 is attached to the elastic body 64. The urging direction works in the direction of bringing the side first swing link 61 closer to the side rotary upper surface cover 21 . As a result, the first side swing link 61 is prevented from rotating unexpectedly, and the rotation of the first side leveling plate 22 and the second side leveling plate 23 is stably restricted.

When the side working body 2 is to be unfolded from the state folded above the central working body 1, it is carried out after the earthing work state is set. When the actuators 183 and 63 are extended, that is, when they are placed in the shoring state, the side leveling plate link mechanism 5 and the side link restricting means change from the state shown in FIG. 19 to the state shown in FIG. Changing to the state of FIG. 18 allows transition to the expanded state. When the side working body 2 is unfolded from the folded state, the central end 41b of the stopper arm 41 of the first side leveling plate fixing mechanism 4 is engaged with the stopper arm rotation check projection 43 in the middle of the transition to the unfolded state. Then, it rotates in the opposite direction against the biasing force of the arm torsion spring 44 in the direction of arrow R and stops. 10, the side end 41a of the stopper arm 41 is disengaged from the first leveling plate locking projection 42, and the first side leveling plate is released. The base plate 22 is vertically rotatable with respect to the side rotary top cover 21 .

As described above, when the side working body 2 is in the folded state, even if the individual actuators are collectively operated. Regardless of the position of the ground leveling plate of the central working body 1 during the shoveling work or soil crushing work, the first side leveling board 22 and the second side leveling board 23 of the side working body 2 can maintain the regulation of rotation.
Also, when the side working body 2 is in the unfolded state, at the same time as the central working body 1, the ground leveling plate of the side working body 2 can be selected for earth gathering work or soil crushing work.

INDUSTRIAL APPLICABILITY This invention has a collapsible side work body that is an extension work body, and is used as a folding type soil crushing device such as a puddling device or a soil crushing rotary device having a leveling board capable of performing puddling work and soil crushing work in a field. It is possible.

1 Central working body 2 Side working body 2L Left working body 2R Right working body 5 Side leveling plate link mechanism 50 Side first link 50d Regulation release range 50e Regulation range 51 Side second link 53 Projection 6 side Part link restricting means 61 Side first swing link 62 Side second swing link 63 Actuator 64 Elastic body

Claims (3)

A first leveling plate positioned at the rear portion of a work body for crushing work and vertically rotatable, and a second leveling board provided vertically rotatably on the first leveling board. prepared,
a side first rocking link which is installed on the working body and is rotatable about the left-right direction as a fulcrum axis;
a side second swing link rotatably provided on the working body;
a side first link having one end rotatably connected to the working body, having an opening in a lower portion thereof and a guide portion continuously from the opening for guiding the second rocking link;
a side second link having one end rotatably connected to the other end of the side first link and the other end rotatably connected to the second leveling plate;
The guide portion has a regulation range for regulating rotation of the side first link;
a deregulation range that enables rotation of the side first link;
A collapsible soil breaking device comprising: a protrusion that prevents the second swing link from moving to the restriction release range;
The collapsible soil breaking device of claim 1, further comprising: The first side swing link further includes an elastic body capable of biasing the first side swing link in a rotating direction,
A biasing direction differs between a state in which rotation of the first side link is restricted and a state in which the restriction on rotation of the first side link is released.
3. The folding type earth crushing device according to claim 1 or 2, characterized in that:

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