JP5356262B2 - Rotary tiller grooving device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a furrow opener that vertically moves a furrow-opening roller in a constant position, enables a tilling operation from a ridge side by a rotary power tiller and surely forms a proper continuous long furrow. <P>SOLUTION: The furrow opener of the rotary power tiller is equipped with a support frame 14 in a backward projecting state at the rear of a rotary machine frame 4. The front of a parallel link implement 50 having a pair of top and bottom parallel links 55 and 56 is connected to the support frame 14. A caster support 51 is arranged at the rear of the parallel link implement 50. The caster support 51 is equipped with the furrow-opening roller 7 that is rolled on a tilling track and forms a continuous long furrow L. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a grooving device for a rotary tiller that forms a groove in a tilling mark.

  In order to form a drainage ditch in the tillage track when sowing at the same time as the tilling work with the rotary tiller, a ditching mechanism is provided at the rear of the rotary tiller, and this ditching mechanism is installed on the rotary machine frame. A support rod is provided on the support frame so as to be adjustable in the vertical direction, and a sorban ball-shaped grooved ring is supported on the support rod via a hawk (see, for example, Patent Document 1).

Japanese Patent No. 2548034

In the prior art, since the support rod is fixed at the adjusted position, the grooved ring becomes an obstacle, making it difficult to bring the rotary tillage part close to the wrinkle. Therefore, it is difficult to form a proper drainage groove.
The present invention has been made in view of the above circumstances, and the grooving roller can be moved up and down in a fixed posture so that the cultivating work can be performed from the wrinkle by the rotary cultivator. An object of the present invention is to provide a grooving device for a rotary cultivator that makes it possible to follow the tilling trace in the rolling direction and to surely form an appropriate continuous long groove.

In order to achieve the above object, the present invention has taken the following measures.
That is, the grooving device 2 of the rotary cultivator 1 according to the present invention is provided with the support frame 14 protruding rearward at the rear part of the rotary machine frame 4, and has a pair of upper and lower parallel links 55, 56 on the support frame 14. A grooving roller that connects the front part of the parallel link tool 50, and that is provided with a caster support 51 at the rear part of the parallel link tool 50, and that forms a continuous long groove L by rolling a tilling track on the caster support 51. 7 is provided.

According to this, the grooving roller 7 can be independently moved up and down by the vertical swaying of the parallel link member 50, and the grooving position where the grooving roller 7 is placed on the ridge and the rotary cultivator 1 is close to the wrinkle. Thus, the tilling work and the formation of the long groove L can be performed.
Further, the grooving roller 7 can be moved up and down in a fixed posture by the parallel link device 50 and supported by the caster support 51 so that the rolling direction of the grooving roller can follow the direction of the tillage track. An appropriate long groove can be formed reliably.

The upper and lower links 55 and 56 of the parallel link member 50 are capable of restricting the descent of the grooving roller 7 by contacting each other when the grooving roller 7 is lifted by the ascent of the rotary machine frame 4. preferable.
According to this, when the grooving roller 7 is lowered by its own weight when the rotary tiller 1 is raised, when the upper and lower links 55 and 56 of the parallel link tool 50 come into contact with each other, the parallel link tool 50 swings downward. Is stopped, and the descent of the grooving roller 7 is also limited within a predetermined range. Therefore, the grooving roller 7 does not cause contact interference with the rear cover 29 and the like of the rotary tiller 1.

It is preferable to provide a rolling pressure applying tool 53 that applies a rolling pressure to the grooving roller 7 in the parallel link tool 50 and / or between the parallel link tool 50 and the support frame 14.
According to this, the grooving roller 7 can be surely pressed against the tilling trace, and as the formed long groove L, the groove depth can be sufficiently deepened or the groove bottom can be solidified. It is. Further, the upper edges of both groove wall surfaces of the long groove L can be firmly pressed so that no landslide occurs. When these are formed as long grooves L for drainage, a reliable drainage effect can be obtained.

The left and right side surfaces of the grooving roller 7 are chamfered with a tapered side surface 7b that transitions from the large diameter side to the small diameter side in the off-axis direction, and the groove wall upper edge of the long groove L on the small diameter side of the tapered side surface 7b. It is preferable to have a chamfered surface 7c.
According to this, when it forms as the long groove | channel L for drainage, since the both edge parts of the long groove L can be more reliably pressed down by the chamfering surface 7c, the prevention effect of a landslide is also heightened so much.

  According to the present invention, the grooving roller can be moved up and down in a fixed posture so that the rotary cultivator can cultivate from the wrinkle, and the grooving roller can follow the tilling track. Thus, an appropriate continuous long groove can be formed reliably.

It is a whole side view of the rowing tillage start state which shows the embodiment of the present invention. It is a whole side view of a raising work state. It is a whole side view of the state where a rotary tiller was raised. It is a top view of a rotary machine frame and a grooving device. It is a front view of a grooving device. (A) is a front view of a grooving roller, (b) is a front sectional view of a drainage groove formed by this grooving roller. The modification of a grooving roller is shown, Comprising: (a) is a front view of a grooving roller, (b) is front sectional drawing of the drain groove formed with this grooving roller. It is the whole side view which showed the modification of the rolling pressure provision tool.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 thru | or FIG. 6 has shown one Embodiment about the grooving apparatus 2 of the rotary tiller 1 which concerns on this invention. A rotary cultivator 1 includes a rotary machine frame (hereinafter simply referred to as “machine frame”) 4 that is mounted on a rear part of a work vehicle such as a tractor via a three-point link mechanism and the like. A rotary tiller 5 provided at the lower part and a rotary cover 6 covering the rotary tiller 5 are provided.

The grooving device 2 is provided so as to protrude rearward from the machine frame 4 with respect to such a rotary cultivator 1, and when the rotary cultivator 1 is held at a height at which the cultivating work is performed. In addition, it has a grooving roller 7 that can be grounded and pressed against the tilling track at the same time.
By rolling the grooving roller 7 while being pressed against the tilling trace, the upper surface of the tilled soil cultivated by the rotary tilling unit 5 is recessed to form a continuous long groove L. The grooving device 2 is disposed behind the rotary cover 6 at a position shifted in the left-right (plowing width) direction center or left and right from the center.

  In FIG. 1 to FIG. 3, the machine frame 4 of the rotary tiller 1 has a support arm 11 projecting left and right from a gear case 10 at the center in the left-right direction, and the upper end side of the transmission case 12 is placed on the end of the left support arm 11 The upper side of the side frame is connected to the end portion of the right support arm 11 to form a rear portal structure. The machine frame 4 is provided with a support frame 14 protruding rearward.

  A top mast 15 formed in a bifurcated shape is fixed to the upper part of the gear case 10, and a top link pin 16 connected to the top link of the three-point link mechanism is provided on the upper side of the front part of the top mast 15. Is provided. Further, a connecting bracket 17 is fixed between the gear case 10 and the left and right support arms 11, and a lower link pin 18 connected to the left and right lower links of the three-point link mechanism is provided at the front of the connecting bracket 17. Is provided.

The rotary tiller 5 includes a claw shaft 20 that is rotatably supported between the lower portion of the transmission case 12 and the side frame so that the shaft center is rotatable in the left-right direction, and is spaced axially and circumferentially with respect to the claw shaft 20. And a number of tilling claws 21 attached at the same time.
The power from the PTO shaft of the tractor is transmitted to the claw shaft 20 through the PIC shaft 22, the power transmission mechanism in the gear case 10, the transmission shaft in the left support arm 11, and the power transmission mechanism in the transmission case 12.

The rotary cover 6 covers the upper side of the rotary tiller 5 and has an upper cover 27 fixed via a side plate 26 between the transmission case 12 and the side frame, and a support shaft on the rear end side of the upper cover 27. 28, a rear cover 29 that covers the rear of the rotary cultivating unit 5 and a side cover 30 that covers both the left and right sides of the rear of the rotary cultivating unit 5.
The support frame 14 has a pair of left and right support arms 36 whose longitudinal direction is directed in the front-rear direction, and a tool bar 37 that is connected to the rear ends of the left and right support arms 36 and whose longitudinal direction is directed in the left-right direction. The front part of the support arm 36 is pivotally supported by the left and right support arms 11, and the rear part protruding rearward is adjustable in height.

The left and right support arms 36 are slidably fitted to an outer cylinder 39 and an inner cylinder 40 so that the length can be adjusted. The front end of the outer cylinder 39 is vertically connected to the connecting bracket 17 via a pivot 38. An elevating operation means 42 for adjusting the height of the rear portion of the support frame 14 is provided between the center portion of the connecting rod 41 that is swingably connected and connects the outer cylinders 39 and the top mast 15. .
This elevating operation means 42 connects a telescopic rod 43 which is built in a feed screw mechanism and can be expanded and contracted between the top mast 15 and a bracket piece 45 provided on the connecting rod 41, and rotates the operation handle 44. The height of the tool bar 37 with respect to the machine frame 4 is adjusted by extending and retracting the telescopic rod 43. The toolbar 37 is formed of a square pipe or the like.

Next, a specific structure of the grooving device 2 will be described in detail.
As shown in FIGS. 1 to 3, the grooving device 2 includes a parallel link member 50 having a front portion connected to the tool bar 37, and a caster support 51 provided at a rear portion of the parallel link member 50. And a grooving roller 7 rotatably held at the lower end portion of the caster support 51, and a rolling pressure applicator 53 provided on the parallel link device 50.

The parallel link device 50 includes a pair of upper and lower links 55 and 56 formed in the same length, and a front link body 57 that holds and holds the front ends of the links 55 and 56 with a predetermined interval in the vertical direction. And a rear connection body 58 for connecting and holding the rear end portions of the links 55 and 56 with a predetermined interval in the vertical direction.
The front coupling body 57 is formed by welding a pair of left and right side-view U-shaped plate members to the outer surface of a U-shaped grooved steel, and the front end portions of the upper and lower links 55 and 56 are U-shaped in side view. The upper and lower links 55 and 56 are swingable up and down.

  The front connecting body 57 is formed with a jaw portion 65 whose U-shaped cross-section steel bar can be fitted and attached to the tool bar 37 from behind, and a connecting pin 66 is vertically skewed between the jaw portion 65 and the tool bar 37. The retaining pin 67 is inserted into the connecting pin 66 and stopped. The through hole for the connecting pin 66 may be provided only in the center in the left-right direction of the tool bar 37, but in addition to that, it is provided in a plurality of places in the left-right direction so that the mounting position of the grooving device 2 can be changed. It is preferable to keep it.

The rear connection body 58 is formed by welding a pair of left and right plate members to a swivel base portion 70 that holds the caster support body 51, and the rear end portions of the upper and lower links 55 and 56 are connected to the plate members via a pivot 61. It is pivotally connected.
The vertical interval of the pivot 60 in the front connector 57 and the vertical interval of the pivot 61 in the rear connector 58 are substantially the same, whereby the upper and lower links 55 and 56 and the front and rear connectors 57 and 58 are respectively They are substantially parallel to each other.

As a result, the parallel link tool 50 swings up and down with the upper and lower links 55 and 56 held in parallel with each other with respect to the front connecting body 57, and moves the rear connecting body 58 up and down in a fixed posture. Can do. That is, the rear coupling body 58 is configured to maintain a constant posture (angle) in the left-right direction and the up-down direction even when it moves up and down.
As shown in FIG. 3, the upper and lower links 55, 56 are arranged such that when the front connection body 57 is raised as the rotary tiller 1 (machine frame 4) is raised, the rear connection body 58 side (groove The upper and lower links 55, 56 swing downward due to the weight of the cutting roller 7). However, when the ascending position of the front coupling body 57 reaches a height that causes the grooving roller 7 to float, the upper and lower links 55 and 56 come into contact with each other, and the descent of the grooving roller 7 is restricted. Yes.

  Specifically, the height that restricts the descent of the grooving roller 7 due to the rise of the front coupling body 57 is specifically the vertical distance between the pivots 60 and 61 and the thickness of the upper and lower links 55 and 56. Determined by. However, for example, a bolt is screwed at a middle position in the longitudinal direction of the upper link 55 so as to protrude toward the lower link 56, and the bolt end contacts the lower link 56 by adjusting the protruding amount of the bolt. By adopting a structure that can adjust the stopping position, the lowering limit height of the grooving roller 7 may be variable.

The rear coupling body 58 has a swivel base 70 that holds the caster support 51 in a state in which the caster support 51 can be swiveled horizontally. The swivel base 70 moves up and down with its axis centered in the vertical direction (substantially vertical). A penetrating bearing hole 71 is formed.
The caster support 51 is in a state of straddling the slewing shaft 72 inserted into the bearing hole 71 formed in the rear coupling body 58 of the parallel link member 50 and the groove cutting roller 7 on the lower side of the slewing shaft 72. The roller bracket 74 is provided, and the roller bracket 74 supports the rotating shaft 76 of the grooving roller 7 at both ends.

As shown in FIGS. 5 and 6, the grooving roller 7 has an abacus bead shape, and has an outer peripheral surface 7a and left and right side surfaces 7b. The left and right side surfaces 7b are off-axis from the large diameter side to the small diameter side. It has a tapered side surface that transitions to
The caster support 51 is positioned so that the rotation shaft 76 is displaced from the axial center extension position of the pivot shaft 72 and can swing around the pivot center of the pivot shaft 72, so that the grooving roller 7 can be cast. I support it. Therefore, when the rotary cultivator 1 moves left and right by steering the tractor and the tilling traces meander, the rolling direction of the grooving roller 7 follows the meandering and is orthogonal to the tilling width direction.

In order to cause the grooving roller 7 to perform a caster operation more accurately and quickly, it is preferable that the caster support 51 has the pivot shaft 72 close to the vertical. The grooving roller 7 is configured to cut the long groove L for drainage. Hereinafter, the long groove L for drainage is referred to as a drainage groove.
The grooving roller 7 rolls in contact with the tillage track to form a substantially V-shaped drainage groove L having a flat groove bottom. The drainage groove L has a cross-sectional shape suitable for drainage. For example, the groove bottom width b is 50 mm, the opening width w is 100 mm, and the groove depth d is 50 mm. The grooving roller 7 has left and right tapered side surfaces 7b, so that both edges (bank portions) of the drainage groove can be firmly pressed to prevent landslide.

Further, since the rolling direction of the grooving roller 7 is always orthogonal to the tilling width direction, the grooving roller 7 does not widen the opening width w, and the drainage groove L has a proper shape over the entire length. Formed.
The grooving roller 7 and the caster support 51 are formed of relatively heavy objects, and the drainage groove L can be formed by their own weight, but in order to form a deeper drainage groove L, A rolling pressure applicator 53 is provided.

As shown in FIGS. 1 to 4, the rolling pressure applicator 53 of the present embodiment is for applying a rolling pressure in a state where the grooving roller 7 is grounded on the ridge, and is a parallel link tool. The structure which energizes 50 downward is adopted.
In other words, the parallel link member 50 is provided with an upper engaging portion 82 that protrudes in the left-right direction from the upper surface of the middle portion in the longitudinal direction of the upper link 55, and a stay provided on the jaw portion 65 of the front connector 57 so as to protrude downward. A lower engaging portion 84 projecting from the portion 83 in the left-right direction is provided, and a pair of left and right tensions are provided between corresponding ends of the left and right ends of the upper engaging portion 82 and the left and right ends of the lower engaging portion 84. A biasing tool 85 such as a coil spring is bridged.

Therefore, the spring force that the left and right urging tools 85 try to contract receives an acting force that causes the upper and lower links 55 and 56 to move downward with the pivot 60 of the front connector 57 as a fulcrum. Thus, the grooving roller 7 receives a downward pressing force via the rear coupling body 58 and the caster support body 51.
Next, the usage method in the grooving apparatus 2 of the rotary tiller 1 which concerns on this invention is demonstrated.

The rotary cultivator 1 is attached to the rear part of the work vehicle such as a tractor, and the rotary cultivator 1 is made to enter the field from the work vehicle side while being raised as shown in FIG.
When the rotary tiller 1 is raised, the grooving roller 7 of the grooving device 2 is lowered by its own weight, but the descent of the grooving roller 7 is restricted by the mutual contact of the upper and lower links 55 and 56. Therefore, the grooving roller 7 does not cause contact interference with the rear cover 29 and the like of the rotary tiller 1.

When the work vehicle enters the field from the ridge M and the rotary tiller 5 reaches the ridge M in the field, the rotary cultivator 1 is lowered. The grooving device 2 is also lowered together with the rotary cultivator 1, but the grooving roller 7 of the grooving device 2 is in contact with the heel M by the upward swing of the upper and lower links 55 and 56 as shown in FIG. become.
That is, when the grooving roller 7 can be placed on the ridge M, the rotary cultivating section 5 can cultivate as close as possible to the ridges, and then the cultivating operation is started to bring the work vehicle into the field. The grooving roller 7 on the ridge M descends from the ridge M to the field side by its own weight and rolling pressure application tool 53 and rolls the cultivated trace (the ridge) by the rotary cultivating unit 5. However, the drainage groove L is formed.

When the rotary cultivator 1 moves to the left and right during tilling work and the tilling traces meander, the caster support 51 turns around the turning shaft 72 and the rolling direction of the grooving roller 7 is orthogonal to the tilling width direction. Follow that meander as you do.
The present invention is not limited to the above-described embodiment, and various modifications can be made.
For example, FIG. 7 shows a modification of the grooving roller 7. The grooving roller 7 is formed with not only the tapered side surface 7b on both side surfaces in the axial direction but also a shaped ring portion 90 that bulges in a stepped state on the small diameter side of the tapered side surface 7b. A rounded chamfered surface 7c is formed at the corner between 90 and the tapered side surface 7b.

If such a chamfered surface 7c is formed, the upper edge of the groove wall surface of the drainage groove L is chamfered. Therefore, the upper edge of both the groove wall surfaces of the drainage groove L can be more reliably pressed, and the landslide is prevented. The prevention effect is increased accordingly.
FIG. 8 shows a modification of the rolling pressure applicator 53. The rolling pressure applicator 53 is provided with a weight 91 at the upper portion of the rear link body 58 of the parallel link tool 50. The weight 91 may be provided together with the rolling pressure applying device 53 of the above embodiment having the urging device 85.

The grooving roller 7 itself is made of solid iron, or has a hollow structure and is filled with lead so that the grooving roller 7 itself also serves as a weight. The dynamic pressure applicator 53 may be configured.
Furthermore, the groove cutting device 2 may be provided in a pair at the left and right end portions of the tool bar 37, and the drainage grooves L may be formed at two places spaced apart in the left-right direction of the raised tillage trace.

  Furthermore, the grooving roller 7 of the grooving device 2 may be formed into a V-shaped groove having no groove bottom width b or a rectangular groove in which the left and right side surfaces 7b are parallel, and such various shapes are adopted. Thus, the long groove L is used not only for drainage but also for other uses, for example, transplanting for transplanting transplanted seedlings such as sugarcane after tillage, or for sowing seeds by seeding and spot seeding from a seeder mounted on the tool bar 37. be able to.

1 Rotary tiller 2 Grooving device 4 Rotary machine frame (machine frame)
7 Grooving roller 7b Tapered side surface 7c Chamfered surface 14 Support frame 50 Parallel link tool 51 Caster support 53 Rolling pressure applicator 55 Upper link 56 Lower link L Long groove (drainage groove)
M 畦

Claims (4)

  A support frame (14) is provided at the rear part of the rotary machine frame (4) so as to protrude rearward, and the front part of the parallel link device (50) having a pair of upper and lower parallel links (55, 56) on the support frame (14). , And a caster support (51) is provided at the rear part of the parallel link tool (50), and a cultivating mark is rolled on the caster support (51) to form a continuous long groove (L). A grooving device for a rotary tiller, characterized in that a roller (7) is provided.   The upper and lower links (55, 56) of the parallel link tool (50) come into contact with each other when the grooving roller (7) is lifted by the ascent of the rotary machine frame (4) and the grooving roller (7). 2. The grooving device for a rotary tiller according to claim 1, wherein the descent can be restricted.   A rolling pressure applicator (53) for applying a rolling pressure to the grooving roller (7) and / or between the parallel link tool (50) and / or between the parallel link tool (50) and the support frame (14). The grooving device for a rotary tiller according to claim 1 or 2, characterized in that it is provided.   The left and right side surfaces of the grooving roller (7) are a tapered side surface (7b) that transitions from the large diameter side to the small diameter side in the off-axis direction, and a continuous long groove on the small diameter side of the tapered side surface (7b). The grooving device for a rotary tiller according to any one of claims 1 to 3, further comprising a chamfered surface (7c) for chamfering the upper edge of the groove wall surface of (L).

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