JPH09107709A - Tilling machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a tilling machine having an easily exchangeable connection frame, enabling easy exchange of the operation mechanism for a leveling member, keeping the safety in the exchanging operation of the leveling member operation mechanism with the connection frame, preventing the increase in the whole size of a working machine by the leveling member operation mechanism and having a desirable appearance. SOLUTION: A working machine main body 1 is provided with a freely rotatable rotary working member and a leveling member 29 to level mud soil crushed by the rotary working member 6. A leveling member operation mechanism 31 having an operation handle 52 to change the leveling work posture of the leveling member 29 is placed at the top of the working machine main body 1. A connection frame 84 having a part 87 connecting with the top link of a tractor is detachably connected to the top end of the working machine main body 1 in a state of covering the leveling member operation mechanism 31. The leveling member operation mechanism 31 is provided with a tiltable arm 39 attached to the attaching frame 32, a link mechanism 53, a cam member 44 and an operation handle.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tillage implement,
For example, the present invention relates to a method in which a paddy field is cultivated and crushed, and the surface of the crushed soil is leveled for leveling, and a paddy field is cultivated for crushed soil, and the crushed soil is ground for leveling.

[0002]

2. Description of the Related Art Conventionally, as a plowing work machine of this type, for example, as disclosed in Japanese Patent Laid-Open No. 6-169604, the upper end portion of a working machine body provided with a rotary work body rotatably is provided. A connecting frame which is connected to the top link of the tractor is detachably fixed by a plurality of screws, and a supporting projection and a bracket projecting from the upper end of the connecting frame are provided at the rear part of the rotary working body. A ground leveling body operation mechanism for converting the ground leveling body into a scraping work position and a soil pulling work position via a link mechanism is movably mounted, and is connected to the left and right parts of the working machine body to connect to the left and right lower links of the tractor. A configuration in which an arm is detachably fixed is known.

[0003]

In the structure described in the above publication, the connecting frame at the upper end of the working machine body and the left and right connecting arms of the working machine body are such that the working machine body has top links for various tractors of different types and It is detachably fixed to the working machine body so that it can be connected to the left and right lower links.

However, since the ground leveling body operating mechanism for converting the ground leveling work posture of the ground leveling body is attached to the connection frame of the main body of the working machine, when the connection frame is detached and replaced according to the model of the tractor. , It is necessary to remove the leveling body operation mechanism from the connection frame and reattach this leveling body operation mechanism to a new connection frame.
The operation of changing the connecting frame is not easy, and the ground leveling body operating mechanism is projected and exposed above the connecting frame, and this ground leveling body operating mechanism causes an increase in the size of the entire working machine. There is a problem in that it is necessary to be careful not to pinch a hand or the like with the lock mechanism that locks the ground leveling body at the setting position during the switching operation of the ground leveling body operation mechanism, and this is not preferable in terms of appearance.

The present invention has been made in view of the above points, and it is easy to change the connecting frame and to easily switch the ground leveling body operating mechanism. An object of the present invention is to provide a plowing work machine that can be covered to ensure safety during switching operation of the ground leveling body operation mechanism, prevent the work leveling machine from increasing in size due to the ground leveling body operation mechanism, and have a pleasing appearance. It is a thing.

[0006]

A plowing work machine according to claim 1 is provided with a work machine body having a rotary work body rotatably provided, and a rear part of the rotary work body of the work machine body. A leveling body for leveling mud crushed by this rotary working body, and a leveling body operation mechanism having an operation handle provided at the upper end of the work machine body for converting the leveling work posture of the leveling body, and this leveling A connecting frame which is detachably attached to the upper end of the working machine main body in a state of covering the body operating mechanism and has a connecting part at the tip end which connects to the top link of the tractor for pulling the working machine main body. Is.

When the working machine main body is connected to the tractor, the connecting frame of the working machine main body is detached and replaced according to the model of the tractor, if necessary. At this time, since the ground leveling body operation mechanism having the operation handle for converting the ground leveling work posture of the ground leveling body is not attached to the connection frame, the connection frame can be easily attached and detached and replaced. The connecting frame is detachably attached to the upper end of the work machine main body in a state of covering the ground leveling body operating mechanism on the upper end of the work machine main body.

Further, the working machine main body is connected to the tractor by connecting the top link of the tractor to the connecting portion at the tip of the connecting frame attached to the working machine main body. By switching the operation handle of the ground leveling body operation mechanism, the ground leveling body is switched and set to a predetermined leveling work posture for leveling the mud soil crushed by the rotary working body.

A tillage implement according to a second aspect of the present invention is the first aspect of the present invention.
In the cultivating work machine described in (1), the ground leveling body operating mechanism is a pivoting arm that is rotatably supported in a front-rear direction by a mounting frame provided at an upper end portion of the working machine body and interlocks the ground leveling body via a link mechanism. A cam body that is pivotally supported in the front-rear direction by the mounting frame and that rotates the rotating arm in the front-rear direction to convert the ground leveling body into a scraping work position and a soil pulling work position; And an operation handle which is fixed and rotates the cam body.

When the cam body is pivotally operated by the operation handle, the pivot arm is pivoted in the front-rear direction by the cam body around the support shaft of the mounting frame, and the pivot arm links. The ground leveling body is converted to the scraping work posture or the soil pulling work posture through the mechanism.

A tilling machine according to a third aspect of the present invention is the second aspect of the present invention.
In the cultivating work machine described in (1), the cam body has a first stopper releasably engaged with a first stopper provided on the rotating arm.
Has a second engaging concave portion slidably engaged with a second stopper provided on the mounting frame, and is urged to rotate forward by a spring. .

Then, the cam body is rotated by the operation lever, and the first engaging concave portion of the cam body is engaged with the first stopper of the rotating arm, whereby the ground leveling body moves to the earth pulling work posture. Converted to. In this case, the second of the cam body
One end of the engaging recess of is urgingly engaged with the second stopper of the mounting frame. Further, the other end of the second engaging concave portion of the cam body is biased and engaged with the second stopper of the mounting frame, so that the ground leveling body is converted and set to the scraping work posture. In this case, the first engagement recess of the cam body is disengaged from the first stopper of the rotating arm.

The tiller according to claim 4 is the tiller according to claim 1.
In the cultivating work machine described in (1), the connecting frame having the connecting portion at the tip end is detachably attached to the attachment frame provided at the upper end of the work implement main body with the base end portion covering the ground leveling body operating mechanism. It is what has been. Then, the base end portion of the connection frame is connected to the attachment frame, so that the ground leveling body operation mechanism provided on the attachment frame is covered with the base end portion of the connection frame.

[0014]

An embodiment of the present invention will be described below with reference to the accompanying drawings.

1 is a working machine main body, and this working machine main body 1 is
It has a hollow pipe-shaped main frame 2 in the left-right direction, a mission case 3 containing a mission (not shown) is fixed to an intermediate portion of the main frame 2, and the mission case 3 has the mission on the front side thereof. The input shaft 4 is rotatably projected forward.

Further, a vertical transmission case 5 and a bracket (not shown), which are disposed opposite to each other, are integrally fixed to both ends of the main frame 2, and the lower ends of the transmission case 5 and the bracket are fixed. A rotary work body 6 for crushing cultivated soil is rotatably mounted between the parts.

The rotary work body 6 has a horizontal rotary shaft 7 rotatably mounted between the lower ends of the transmission case 5 and the bracket. The rotary shaft 7 has a large number of axial shafts. Substitute scraping claws 8 are radially provided. And
The rotary work body 6 is rotationally driven by an output from an output shaft (not shown) of the mission via an interlocking medium provided in the transmission case 5.

A cover body 9 covering the upper part of the rotary working body 6 is integrally fixed between the upper portions of the transmission case 5 and the bracket. This cover body 9
Has left and right side plates 10 fixed to the inner side of the transmission case 5 and the bracket. Between the upper ends of the left and right side plates 10, an arcuate shape is formed in an upward direction following the rotation trajectory of the rotary working body 6. A top plate 11 that is curvedly formed in the shape is integrally fixed. In addition, a reinforcing frame body 12 in the left-right direction is integrally fixed to the upper rear side of the top plate 11, and the reinforcing frame body 12 has a horizontal portion.
It has 13 and a vertical portion 14.

Further, a mud suppressor 15 in the left-right direction is integrally provided on the lower part of the front end of the top plate 11 in front of and above the rotation locus of the rotary working body 6 so as to extend downward. The mud suppressor 15 is formed to have a vertical portion 16 in the left-right direction and a horizontal portion 17 that horizontally projects from the lower end of the vertical portion 16 toward the front. The upper end of the vertical portion 16 is fixed near the front end of the top plate 11, and the front end of the horizontal portion 17 is fixed to the front end edge of the top plate 11.

Further, substantially triangular arm mounting plates 19 are integrally fixed to the vicinity of both ends of the main frame 2, and the front edge portions of the left and right arm mounting plates 19 are vertically spaced by a predetermined distance. A plurality of mounting holes 20 are provided respectively. Further, a support piece 22 is detachably connected to each of the mounting holes 20 formed in the projecting projecting end portions of the left and right arm mounting plates 19 by bolts and nuts 21. The top plate 11 of the cover body 9 is supported by the left and right support pieces 22.
The front side portions of are supported, and the left and right support pieces 22 are fixed to the cover body 9 with bolts and nuts 18.

Further, front and rear connecting arms 23 are detachably connected to the left and right arm mounting plates 19, respectively. The left and right connecting arms 23 have a plurality of communication holes 24, which communicate with the plurality of mounting holes 20 of the left and right arm mounting plates 19, at the base end thereof and are provided at predetermined intervals in the vertical direction. Left and right lower pins 25 are detachably provided at the tip end portion, respectively. The left and right arm mounting plates 19 are attached and detached by bolts and nuts (not shown) inserted into the plurality of mounting holes 20 and the plurality of communicating holes 24 in which the left and right connecting arms 23 communicate with each other. It is freely connected.

The left and right arm mounting plates 19 are
Using the required number of mounting holes 20 among the plurality of mounting holes 20,
Various left and right connecting arms 23 capable of connecting the left and right lower links of various types of tractors are connected by a plurality of communication holes 24 and bolts and nuts (not shown) formed in the connecting arm 23. It has become.

Next, an elastic plate 26 made of rubber or the like in the left-right direction is integrally fixed to the rear end portion of the top plate 11 of the cover body 9, and the lower end portion of the elastic plate 26 is fixed to the rotary work body 6. A leveling plate 27 as a ground leveling body disposed in the rear is fixed, and a rake 29 as a leveling level is pivotally supported by a support shaft 28 in the left-right direction at the lower end of the leveling plate 27 so as to be vertically rotatable. Has been done.
Then, the flat plate 27 and the rake fixed to the elastic plate 26.
At 29, a leveling mechanism 30 for leveling the mud crushed by the rotary work body 6 is configured.

Next, in the upper end portion of the working machine body 1, that is, in the mission case 3, there is a ground leveling body operating mechanism 31 for converting the ground leveling work position of the ground leveling mechanism 30 into a scraping work position and a soil pulling work position. It is provided. The ground leveling body operation mechanism 31 has a vertical mounting frame 32 integrally fixed along the rear side from the upper end of the mission case 3, and the mounting frame 32 has a predetermined interval in the horizontal direction. It is formed by a pair of left and right mounting plates 33 arranged in the up-down direction.

Further, first mounting holes 34 are formed opposite to each other at the upper ends of the left and right mounting plates 33, and the left and right mounting plates 33 are located at the rear of the first mounting holes 34. Second mounting holes 35 are formed opposite to each other in the upper part of the second mounting holes 35, and the left and right mounting plates 33 are positioned below the second mounting holes 35.
A third mounting hole 36 is formed in the lower part of the third mounting hole 36 so as to face each other, and a fourth mounting hole is located below the third mounting hole 36 and faces the lower ends of the left and right mounting plates 33. 37 are formed respectively.

Next, the lower end of the vertically rotating arm 39 is secured between the first mounting holes 34 by bolts and nuts 38 which are inserted into and removed from the first mounting holes 34. It is rotatably supported in the front-back direction. The rotating arm 39 is formed in a substantially U-shaped cross section, and a communication hole 40 communicating with the first mounting hole 34 is formed in the lower end portion thereof.
A support shaft 41 is pivotally attached to the upper end portion thereof, and a first stopper 42 in the left-right direction is fixed to a substantially middle portion thereof. The pivot arm 39 is pivotally supported in the front-rear direction about the bolts of the bolts and nuts 38 inserted into the first mounting holes 34 and the communication holes 40.

Next, a mounting shaft is provided between the second mounting holes 35.
43 is rotatably inserted, and a cam body 44 is integrally fixed to the mounting shaft 43 between the left and right mounting plates 33. The cam body 44 has a mounting hole 45 formed at the center thereof and fixed by inserting the mounting shaft 43, and a cam surface 46 is formed at the peripheral portion centering on the mounting hole 45. 46
A first engaging recess 47 is formed on one side portion of the first stopper 42 so as to engage with and disengage from the first stopper 42.

The first side is provided on the other side of the cam surface 46.
A second engaging recess 48 is formed on the opposite side of the engaging recess 47, and the second engaging recess 48 has the mounting hole at one end.
One engaging step portion 48a recessed toward 45 is provided, and the other engaging step portion 48b recessed toward the attachment hole 45 is provided at the other end. The second engaging recess 48 is positioned below the second mounting hole 35 and is fixed between the left and right mounting plates 33 in the left-right direction.
Is slidably engaged with.

Further, one end of the coil spring 50 is attached to the cam body 44, and the other end of the coil spring 50 is attached from the one mounting plate 33 to the other mounting plate.
It is attached to a locking projection 51 that projects toward 33.
The cam body 44 is urged to rotate forward by the coil spring 50.

A connecting projection is provided on one end of the mounting shaft 43.
43a is bent at a substantially right angle, and the connecting protrusion 43a
An operation handle 52 for rotating the cam body 44 is integrally fixed to the.

Next, a link mechanism for vertically rotating the rake 29 as the ground leveling body around the support shaft 28 on the support shaft 41 axially attached to the upper end of the rotating arm 39. 53 are connected. The link mechanism 53 has a front-rear interlocking rod 54, one end of which is rotatably attached to a support shaft 41 of the rotating arm 39, and the other end of the interlocking rod 54 has a front-rear direction. An intermediate portion of the rotating frame 55 is rotatably mounted on a support shaft 56.

The rotating frame 55 has left and right side plates 55a and is formed in a substantially U-shaped cross section with an open lower surface. The top plate 55b integrally formed between the upper ends of the left and right side plates 55a has a front-back direction. A shaft support 57 having a substantially U-shaped cross-section and having the support shaft 56 attached thereto is integrally fixed to an intermediate portion of the. Also, the left and right side plates
Insertion hole 55c formed at one end of 55a and this insertion hole 55
A left and right supporting shaft 59 is rotatably mounted in a mounting hole 58 formed in the vicinity of the lower ends of the left and right mounting plates 33 communicating with c, and the rotating frame 55 is centered around the supporting shaft 59. Is rotatably mounted in the vertical direction.

Further, the upper end portions of the vertical lifting rods 61 are rotatably attached to the attachment holes 55d formed at the other ends of the left and right side plates 55a by the attachment shafts 60 in the left and right directions. This hanging rod
At the lower end of 61, a mounting piece 62 integrally provided on the upper portion of the rake 29 is rotatably mounted on a horizontal support shaft 63. Further, the left and right side plates 55a of the rotating frame 55
Is the protruding portion 64 that protrudes toward the lower rear side.
The left and right protrusions 64 are respectively provided with circular mounting holes 65 facing each other.

Next, a substantially U-shaped connecting frame 66 is integrally fixed to the horizontal portion 13 of the reinforcing frame 12 located below the mounting frame 32, and the left and right frames of the connecting frame 66 are joined together. A communicating hole 68 is formed at the upper end of the front side of the plate 67 so as to communicate with the fourth mounting hole 37 at the lower end of the mounting frame 32. The lower end of the mounting frame 32 is connected to the connecting frame 66 by a communicating hole 68 and a bolt / nut 69 inserted into the fourth mounting hole 37. Further, mounting holes 70 are formed at the rear upper ends of the left and right frame plates 67 of the connecting frame 66 so as to face each other.

Next, the connecting frame 66 and the rotating frame
An urging mechanism for urging the rotating frame 55 upward with respect to 55 to suppress downward rotation of the rake 29 about the support shaft 28 via the suspension rod 61. 71 are provided.

The urging mechanism 71 has a forward / backward moving rod 73 rotatably supported in the vertical direction by a mounting shaft 72 inserted in the mounting holes 70 facing each other in the connecting frame 66, This retreat
A spring receiver 75 having a flange 74 is fitted and integrally fixed to a portion (front side) near one end of 73.

Further, the rotating frame 55 has a rotating body 76 in the left-right direction which is rotatably inserted into the mounting holes 65 facing each other, and the advance / retreat rod 73 can be moved back and forth in an intermediate portion of the rotating body 76. A guide hole 77 in the front-rear direction that is inserted through is formed so as to penetrate therethrough, and annular grooves 78 are formed at both ends thereof, and the annular grooves 78 at both ends are engaged with the outside of the left and right side plates 55a. Retaining rings 79 that prevent the rotating body 76 from coming off are fitted in the respective rings.

Further, a spring receiving body 81 having a flange 80 located on the front side of the rotating body 76 is slidably fitted in the advancing / retreating rod 73 in the axial direction. It is formed with an engaging projection 82 that engages with 76. A coil spring 83 is wound around the advancing / retreating rod 73, one end of the coil spring 83 is engaged with the flange 74 of the front spring receiver 75, and the other end of the coil spring 83 is engaged. Is engaged with the flange 80 of the rear spring receiver 81.

Then, the rotating body 76 is constantly urged upward and rearward by the coil spring 83 via the spring receiving body 81 on the rear side, and the link that rotatably supports the rotating body 76. The rotating frame 55 of the mechanism 53 is elastically supported upward, and the downward rotation of the rake 29 about the support shaft 28 is suppressed via the suspension rod 61. There is.

Next, a top mast in the front-rear direction, that is, a connecting frame 84 is detachably connected to the opposing mounting plates 33 of the mounting frame 32 in a state of covering the ground leveling body operating mechanism 31. The connecting frame 84 includes a connecting side plate 85 and a connecting side plate 85 facing each other in the front-rear direction, the lower end portions of which are engaged with the outer sides of the mounting plates 33 facing each other.
Each of them has a top plate 86 that is continuously provided between the upper ends of the 85, and is formed in a substantially U-shaped cross section.

Further, connecting portions 87 are respectively formed at the tips of the opposing connecting side plates 85 so as to face each other, and the bolts and nuts 38 are provided at the opposing connecting side plates 85 located at substantially intermediate portions in the front-rear direction. Through-holes 88 through which the bolts of FIG. 3 are removably inserted are formed opposite to each other, and the connecting side plates 85 located below the rear end thereof communicate with the corresponding third mounting holes 36. Moreover, insertion holes 90 through which the bolts of the bolts and nuts 89 are freely inserted and removed are formed opposite to each other.

Then, the connecting frame 84 is detachably connected to the mounting frame 32 by the bolts and nuts 38 on the front side and the bolts and nuts 89 on the rear end so as to cover the ground leveling body operating mechanism 31. ing. Then, the working machine body 1 is detachably connected to the three-point connecting mechanism of the tractor, that is, the top link and the left and right lower links by the connecting frame 84 and the left and right connecting arms 23. Therefore, the connecting frame 84 and the left and right connecting arms 23 can easily be a plurality of types corresponding to the top links and the left and right lower links of various tractors, and can be selected corresponding to the top links and the left and right lower links of the various tractors. It is designed to be able to detachably connect the items.

Next, a support frame 91 is fixed to the left and right portions of the reinforcing frame 12, and a rear end portion of the support frame 91 is rotated by a support shaft 92 in the left and right direction in a front-rear rotating frame 93. Is rotatably pivoted in the vertical direction, and is attached to the lower end of a vertical hanging rod 95 rotatably pivoted to the rear end of the pivot frame 93 by a horizontal support shaft 94. The flat plate 27 is rotatably attached to a horizontal support shaft 96.

Between the support frame 91 and the rotating frame 93, the rotating frame 93 is urged and supported upward, and the flat plate 27 is supported by the suspension rod 95. Suppression mechanism that suppresses downward rotation in a state where it is set to a predetermined position
97 is provided. In the figure, 98 is the operation handle of the suppression mechanism 97, 99 is the first stopper of the operation handle 98, 100
Is a second stopper of the operation handle 98, and 101 is a rotating shaft portion of the operation handle 98.

Next, the operation of the above embodiment will be described.

When connecting the working machine body 1 to the tractor,
If necessary, the connecting frame 84 of the working machine body 1 is attached / detached according to the model of the tractor. That is, the bolts and nuts 38 before and after the left and right mounting plates 33 of the mounting frame 32,
While removing 89 respectively, engage a predetermined connecting frame 84 selected according to the model of the tractor with the left and right mounting plates 33 of the mounting frame 32, and attach the left and right mounting plates 33 to the front and rear bolts and nuts 38, 89. To connect the connection frames 84.

At this time, since the ground leveling body operation mechanism 31 having the operation handle 52 for converting the ground leveling work posture of the rake 29 is not attached to the connection frame 84, the connection frame 84 can be easily attached / detached and replaced. it can. The connecting frame 84 is detachably connected to the upper end portion of the work machine body 1 in a state of covering the ground leveling body operating mechanism 31 at the upper end portion of the work machine body 1.

If necessary, the left and right connecting arms 23 of the working machine body 1 are attached and detached according to the model of the tractor. That is, the left and right arm mounting plates 19 of the working machine body 1
Remove each bolt and nut 21 of the above, and engage the predetermined connecting arm 23 selected according to the model of the tractor with the left and right arm mounting plates 19, and attach the left and right arm mounting plates 19 to the respective bolts and nuts 21. To connect the left and right connecting arms 23.

The tip of the top frame of the tractor is rotatably connected to the tip of the connecting frame 84 connected to the working machine body 1 by a connecting pin (not shown) inserted in the connecting portion 87. , The working machine body 1 is connected to the tractor by rotatably connecting the lower pins 25 at the ends of the left and right connecting arms 23 connected to the working machine body 1 to the ends of the left and right lower links of the tractor. It Also,
Working machine body 1 through the power transmission shaft to the PTO shaft of the tractor
The input shaft 4 of the mission is connected.

Further, the operation handle of the leveling body operation mechanism 31.
By switching 52, the rake 29 moves to a predetermined leveling work position for leveling the mud crushed by the rotary work body 6 through the link mechanism 53, that is, the rake 29 is set to the work position of the scraping work or the soil pulling work. Switching is set.

That is, when the operation handle 52 is rotated forward during the scraping work, the cam body 44 is rotated forward by the mounting shaft 43 integrated with the operation handle 52, and the cam body 44 is rotated forward. The second engagement recess 48 of the body 44 is slid along the second stopper 49, and the other engagement step 48b of the second engagement recess 48 is biasedly engaged with the second stopper 49. To be done. Therefore, the rotation of the cam body 44 is locked by the second stopper 49.

Further, when the rotation of the cam body 44 is locked, the rotation arm 39 which receives the load of the rake 29 and the link mechanism 53 is rotated downward about the bolts of the bolts and nuts 38. First stopper 42 of moving arm 39
Is engaged with the cam surface 46 of the cam body 44. When the cam surface 46 of the cam body 44 is rotated downward so that the first stopper 42 of the rotary arm 39 is engaged, the rotary mechanism 39 slightly rotates the link mechanism 53 downward. At the same time, the rake 29 is slightly rotated downward about the support shaft 28.
Is switched to the rear scraping work posture in a state of being tilted downward at a predetermined tilt angle.

During the scraping operation, the coil spring 83 of the urging mechanism 71 provided between the connecting frame 66 and the rotating frame 55 uses the coil spring 83 of the advancing / retreating rod 73 through the spring receiving body 81 on the rear side of the rotating body 76.
Is always urged upward and rearward, so that the rotating frame of the link mechanism 53 that rotatably supports the rotating body 76.
55 is biased upward, and the lifting rod 61
Since the downward rotation of the rake 29 about the support shaft 28 is suppressed via the rake 29, the rake 29 is held in a substantially horizontal substitute scraping work posture, and the rake 29 is prevented from further downward rotation. It is suppressed.

By rotating and operating the operating handles 98 of the left and right restraint mechanisms 97 of the working machine main body 1, the left and right restraint mechanisms 97 are operated and the left and right restraint mechanisms 97 are operated. Thus, the leveling plate 27 of the leveling mechanism 30 is adjusted and set to a substitute scraping work posture inclining downward and rearward at a predetermined inclination angle in accordance with the substitute scraping work posture of the rake 29.

Next, the work machine main body 1 is pulled by the tractor, and the input shaft 4 is rotated by the output from the PTO shaft of the tractor, so that the output of the input shaft 4 from the output shaft of the mission is obtained. Thus, the rotary work body 6 is rotationally driven via the interlocking medium in the transmission case 5. Then, the cultivated soil is successively scraped and crushed by the respective scraping claws 8 of the rotary working body 6 while the crushed soil is successively scraped and crushed, and the surface of the crushed mud is sequentially leveled by the rake 29.

At this time, the rake 29 is held by the urging mechanism 71 in a substantially horizontal substitute scraping work posture, and the rake 29 is restrained from further rotating downward. Is not pushed back toward the front, the rake 29 does not rotate downward more than necessary and a step is not formed at the joint with the adjacent part in the previous stroke, and furthermore, muddy water is swept out too much. Incomplete embedding of foreign matters is prevented.

Next, at the time of earthmoving work, the operation handle
When 52 is rotated backwards, this operation handle
The cam body 44 is rotated rearward by the mounting shaft 43 integrated with 52, and the second engagement recess 48 of the cam body 44 is slid along the second stopper 49. One engagement step portion 48a of the second engagement recess 48 is biased and engaged with the second stopper 49.

When the cam body 44 is rotated rearward, the cam surface 46 of the cam body 44 is disengaged from the first stopper 42 of the rotating arm 39, and the rake 29 and the link mechanism 53 are loaded. Rotating arm 39 that receives bolts and nuts 38
It is rotated downward around the bolt of
The first stopper 42 is engaged with the first engagement recess 47 of the cam body 44. Then, the first engaging recess 47 of the cam body 44
Then, the rotating arm 39 is forcibly lowered and rotated about the bolt of the bolt / nut 38 via the first stopper 42.

Therefore, the cam body is attached to the second stopper 49.
One of the engaging stepped portions 48a of the second engaging concave portion 48 of 44 is engaged, and the first engaging concave portion 47 of the cam body 44 is engaged with the first stopper 42 of the rotating arm 39. By being
This rotating arm 39 is locked in a lowered and rotated state,
The downward rotation of the rotating arm 39 toward the rear and the upward rotation of the rotating arm 39 toward the front are locked.

When the first stopper 42 of the rotating arm 39 is rotated downward so that the first engaging recess 47 of the cam body 44 is engaged, the rotating arm 39 causes the link mechanism 53 to rotate. The rotating frame 55 is rotated downward by the interlocking rod 54 around the support shaft 59, and the mounting shaft at the tip of the rotating frame 55 is attached.
The suspension rod 61 is lowered via 60, and the rake 29 is rotated downward about the support shaft 28 by the suspension rod 61. Then, the rake 29 is switched and set from the state of the scraping work posture in which the rake 29 is inclined rearward and downward at a predetermined inclination angle to the state of the earth pulling work which is projected downwardly of the flat plate 27 in a substantially vertical state. .

At this time, when the turning frame 55 is turned down around the support shaft 59, the turning frame 55 turns the turning member.
While rotating the 76, the reciprocating rod 73 moves the mounting shaft 72 with the rotating body 76.
While being rotated downward about the center, the engaging projection 82 of the spring receiving body 81 on the rear side is pushed forward by the rotating body 76 along the advancing and retracting rod 73 toward the front in the axial direction. The coil spring 83 is pushed and compressed by the flange 80 of the spring receiver 81.

In the state where the rake 29 is switched to the earth-pulling work posture, the advancing / retreating rod 73 is displaced in a substantially horizontal shape, and is compressed and is compressed by the coil spring 83 via the spring receiving body 81 on the rear side. The rotating frame 55 is urged rearward.

Therefore, the cam body 44 of the ground leveling body operating mechanism 31.
The state in which the rotation of the rotating arm 39 is locked by the switch mechanism and the rake 29 is switched to the earth pulling work posture via the link mechanism 53 is further held by the restraining action of the urging mechanism 71.

Next, the work machine main body 1 is pulled by the tractor, and the input shaft 4 is rotated by the output from the PTO shaft of the tractor, so that the output from the output shaft of the mission of the input shaft 4 is output. Thus, the rotary work body 6 is rotationally driven via the interlocking medium in the transmission case 5.

The cultivated soil is progressively scraped and crushed by the scraping claws 8 of the rotary work body 6 while the crushed mud is sequentially ground by the rake 29 to remove the surface of the mud. The ground is gradually leveled. That is, the mud at a high position in the field is ground by the rake 29 to a low position and leveled, and the field is leveled as a whole.

[0066]

According to the first aspect of the present invention, the ground leveling body operation is provided at the upper end portion of the working machine body, which has an operation handle for converting the ground leveling work posture of the ground leveling body for leveling mud crushed by the rotary working body. Since a mechanism is provided and a connecting frame having a connecting portion for connecting to the top link of the tractor is detachably attached to the tip end of the work machine main body in a state of covering the ground leveling body operating mechanism, this connecting frame is Since there is no ground leveling body operating mechanism that has an operating handle, the connecting frame can be easily replaced as needed according to the model of the tractor, and the replacement operation is easy, and switching operation of the ground leveling body operating mechanism is easy. By covering the ground leveling body operation mechanism with this connecting frame, it is possible to ensure safety during the switching operation of the ground leveling body operation mechanism. The ground leveling body does not vibrate during transportation to cause the components of the ground leveling body operation mechanism to project forward and damage the tractor cabin, and the ground leveling body operation mechanism can prevent the work machine from increasing in size. A preferable tiller can be provided.

According to the second aspect of the present invention, the ground leveling body operating mechanism is rotatably supported in the front-rear direction by a mounting frame provided at the upper end of the working machine main body and interlocks the ground leveling body via a link mechanism. A rotating arm, and a cam body that is rotatably supported by the mounting frame in the front-rear direction and that rotates the rotating arm in the front-rear direction to convert the ground leveling body into a scraping work posture and a soil pulling work posture. Since the operation handle is fixed to the cam body to rotate the cam body, the operation body rotates the cam body with the operation handle to scrape the ground leveling body through the link mechanism. The pulling work posture can be easily and reliably converted and set, and the structure of the ground leveling body operation mechanism is also simple.

According to the third aspect of the present invention, the cam body is provided with a first engaging concave portion which is releasably engaged with a first stopper provided on the rotating arm and a second engaging groove provided on the mounting frame.
Has a second engaging recess that slidably engages with the stopper and is urged to rotate forward by a spring, so that the first stopper and the second stopper prevent the cam body from moving. The ground leveling body can be reliably held in the state of being set to the scraping work posture and the soil pulling work posture.

According to the fourth aspect of the present invention, the connecting frame having the connecting portion at the distal end is attached to the mounting frame provided at the upper end of the work machine main body with the base end covering the ground leveling body operating mechanism. Since it is detachably attached, the connection frame can be easily and detachably attached to the attachment frame, and the ground body operation mechanism can be covered by the base end portion of the attachment frame.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a ground leveling body operating mechanism of a tilling work machine showing an embodiment of the present invention.

FIG. 2 is a side view of the same tillage implement.

FIG. 3 is a rear view of the same ground leveling body operating mechanism with a part cut away.

FIG. 4 is an enlarged side view showing a state in which the ground leveling body operating mechanism is switched to a scraping operation.

FIG. 5 is an enlarged side view showing a state in which the ground leveling body operation mechanism is switched to earth-pulling work.

FIG. 6 is an explanatory view showing a mounting state of the above connecting frame.

FIG. 7 is an explanatory view showing a mounting state of the same connecting arm.

FIG. 8 is an exploded perspective view of a part of the above control mechanism.

FIG. 9 is a perspective view of the same support frame body.

FIG. 10 is a side view showing a state in which the above ground leveling body is set to a scraping work state.

FIG. 11 is a side view showing a state in which the above ground leveling body is set to the earth-pulling work state.

[Explanation of symbols]

 1 Working machine body 6 Rotary work body 29 Ground leveling body 31 Ground leveling body operating mechanism 32 Mounting frame 39 Rotating arm 42 First stopper 44 Cam body 47 First engaging concave portion 48 Second engaging concave portion 49 Second stopper 50 Spring 52 Operation handle 53 Link mechanism 84 Coupling frame 87 Coupling section

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hirofumi Hoshihara 5155 Shiokawa, Maruko-cho, Ogata-gun, Nagano Matsuyama Co., Ltd.

Claims (4)

[Claims] 1. A work machine main body having a rotary work body rotatably provided, and a ground body for arranging mud crushed by the rotary work body, which is arranged at a rear portion of the rotary work body of the work machine body. And a ground leveling body operation mechanism having an operation handle provided on the upper end of the work leveling machine body for converting and operating the leveling work posture of the ground leveling body, and the upper end portion of the work leveling machine body in a state of covering the ground leveling body operation mechanism. And a connecting frame having a connecting portion connected to a top link of a tractor for pulling the working machine main body at a tip end thereof, the tilling working machine. 2. The ground leveling body operation mechanism includes a rotating arm pivotally supported in a mounting frame provided at an upper end portion of a work machine main body so as to be rotatable in the front-rear direction and interlocking the ground leveling body via a link mechanism, A cam body that is pivotally supported in the front-rear direction by a mounting frame and that rotates the rotating arm in the front-rear direction to convert the ground leveling body into a scraping work posture and a soil pulling work posture;
2. The tiller according to claim 1, further comprising an operation handle fixed to the cam body for rotating the cam body. 3. The cam body is a first arm provided on the rotating arm.
Has a first engaging concave portion that is disengageably engaged with the stopper and a second engaging concave portion that slidably engages with a second stopper provided on the mounting frame, and is forwardly moved by a spring. The tillage implement according to claim 2, wherein the tiller is urged to rotate toward. 4. A connecting frame having a connecting portion at a tip end thereof is detachably attached to an attachment frame provided at an upper end portion of the working machine main body in a state where the base end portion covers the ground leveling body operating mechanism. The tillage implement according to claim 1, which is characterized in that.