JP2003189701A - Rotary tilling device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rotary tilling device improving the effect of gathering soil thrown away in rear direction by plowing claws to its central position by devising a supporting structure of a plowing shaft against a frame. <P>SOLUTION: This rotary tilling device having a constitution of driving and rotating the plowing shaft by the power of a power vehicle such as a tractor and plowing by multiple plowing claws attached to the plowing shaft is constituted by mounting a left and right pair of power transmission cases (shaft- supporting bodies) 9 at the frame F and pivoting each of plowing shafts S<SB>1</SB>, S<SB>2</SB>independently as slightly inclining against a horizontal line L crossing at right angle to a left and right center line C<SB>1</SB>so as to become a moderate reversed V shape or V shape by a horizontal view corresponding to their rotating direction and as a center driving method, at each of the power transmission cases 9. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary tiller which drives and rotates a tiller shaft by the power of a power vehicle such as a tractor, and a plurality of tiller claws attached to the tiller so that the soil is softened. . In the following description, the drive system of the rotary tiller having two independent tillage shafts relates to each tiller shaft.

[0002]

2. Description of the Related Art As one of working modes using a rotary tiller, there is a work of coating a ridge surface immediately after molding with a mulch film. In this case, a ridge forming plate is attached to the rear of the rotary cultivator, and the soil that has been softened by the rotary cultivator is raised while being moved to the center to form a ridge having a desired shape. In the above-mentioned ridge molding, as a matter of course, it is softened by the rotary tiller,
It is important to bring the soil before molding from the ridge molding plate as close to the center as possible.

The rotary cultivator used for the above purpose includes a side drive system and a biaxial center drive system having two cultivating shafts S ₁ and S ₂ (see FIG. 6).
The former side-drive type rotary tiller has a power transmission case attached to one end of the frame in the lateral direction in a suspended state, and a support bracket attached to the other end so that both ends of one tiller shaft are supported. It is a structure to support. In the latter two-axis center drive system (each of the two cultivating shafts is a center drive system), the two cultivating shafts S ₁ and S ₂ are arranged concentrically on the left and right respectively. Then, the center portion of each of the tilling shafts S ₁ and S _{2 in} the longitudinal direction is supported by the output shaft portion at the lower end portion of the power transmission case 9.

In any type of rotary tiller, its tilling axis is orthogonal to the left and right center lines C _{1 of} the rotary tiller or the traveling direction P of the machine equipped with the rotary tiller. Therefore, the soil that is softened by the rotation of the tiller N is discharged toward the rear Q ₁ (a direction different from the traveling direction P of the rotary tiller 180 °) of the tiller (or tiller shaft). Will be done.

Therefore, depending on the mounting position along the axial direction of the tilling shaft, the tilling claws having different shapes are attached, or in the case of the same tilling claw, depending on the mounting position along the axial direction of the tilling shaft. Then, by changing the mounting direction, etc., the soil that is made to soften by the tilling claw is not immediately afterwards as much as possible,
Although it was devised to be thrown diagonally rearward facing the left and right centerlines, the effect of centering the soil thrown backward only by devising the shape of the plowing claw or the mounting state of the plowing claw on the plowing shaft. Regarding, it was not enough.

[0006]

SUMMARY OF THE INVENTION It is an object of the present invention to improve the centering effect of soil thrown backward by a tilling claw in a rotary tiller by devising a structure for supporting a tilling shaft with respect to a frame.

[0007]

In order to solve the above-mentioned problems, the invention according to claim 1 is such that a shaft support is attached to a lower surface of a frame in a suspended state, and is horizontally supported by the support. A plurality of plowing pawls are attached to the plowing shaft, and the plowing shaft is driven and rotated by the power of a power vehicle such as a tractor, and a rotary plowing device having a structure of plowing with each plowing pawl, wherein a pair of left and right sides are provided on the frame. A shaft support is attached, and two independent cultivating shafts are formed on each of the shaft supports so as to have a gentle hump shape or a reverse hump shape in plan view corresponding to the rotation direction thereof. In addition, it is characterized in that it is slightly inclined with respect to the horizontal line orthogonal to the left and right center lines, and that it is pivotally supported by the center drive system.

According to the first aspect of the present invention, when the two tillage shafts rotate in the down-cut direction, the two tillage shafts rotate in the up-cut direction so as to have a gentle V shape in a plan view. In this case, since the soil is arranged so as to have a gentle inverted C shape in a plan view, in any case, the soil that has been softened by a large number of plowing claws attached to each plowing shaft,
They are thrown diagonally rearward toward the left and right centerlines of the rotary tiller. In this way, the soil that has been softened by a large number of tillers is thrown from the left and right sides of the rotary tiller to the oblique rear toward the center line side, and the center side of the ridge formed immediately after that. Are gathered together. Therefore, the ridge of the target shape is easily formed by the ridge forming plate.

According to a second aspect of the present invention, in the first aspect of the present invention, the power input from the motor vehicle to the gear box installed on the frame is passed through a pair of left and right inclined biaxial power transmission means. It is characterized in that the two tillage shafts are driven and rotated by being transmitted to the input shafts of the left and right power transmission cases constituting the shaft support.

According to the second aspect of the present invention, since the pair of left and right tillage shafts are arranged in a gentle C shape in a plan view, the left and right output shafts and the left and right power transmissions of the gear box are transmitted. The input shaft of the case is offset from the horizontal line orthogonal to the left and right center lines of the motor vehicle by an angle at which each tilling shaft intersects, and is not located on the same line. Therefore, by using the inclined biaxial power transmission means, the power of the power vehicle can be transmitted from the left and right output shafts of the gearbox to the input shafts of the left and right power transmission cases.

Further, the invention of claim 3 is characterized in that, in the invention of claim 2, the tilted biaxial power transmission means is a universal joint, and the use of the universal joint connects the slightly tilted biaxials. Then, the power can be reliably transmitted from one of them to the other.

According to a fourth aspect of the present invention, a shaft support is attached to the lower surface of the frame in a suspended state, a plurality of tillage claws are attached to a tiller shaft horizontally supported by the support, and a tractor or the like is provided. A rotary tiller having a structure in which the tiller shaft is driven to rotate by the power of the power vehicle and is tilled by each tiller claw, and there are three shaft support members at the central portion and both end portions in the left-right direction of the frame. The two independent left and right tillage shafts attached are horizontal lines that are orthogonal to the left and right centerlines so that they have a gentle C-shape or an inverted C-shape in plan view corresponding to the rotation direction. Is disposed at a slight inclination with respect to each other, and its inner end portion is connected to both end portions of the output shaft of the power transmission case that constitutes the central shaft support body via the inclined biaxial power transmission means. At the same time, the outer end of each shaft support is Is rotatably supported, it is characterized in that has a side drive system.

According to the invention of claim 4, the drive system of the two tillage shafts is different from that of claim 1,
If the two cultivating shafts are arranged in a gentle C-shape or an inverted C-shape in a plan view corresponding to the rotation direction, a large number of cultivating shafts attached to each of the two cultivating shafts The soil softened by the claws is thrown to the obliquely rearward facing the right and left centerlines of the rotary tiller, thereby enhancing the centering effect of the soil during the rotary tillage work.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in more detail with reference to embodiments. 1 is a plan view showing a state in which a rotary tiller R _{1 according} to the invention of claim 1 is mounted behind a tractor T, FIG. 2 is a side view of the same, and FIG. 3 is an enlarged rear view of the same. Yes, FIG. 4 is an enlarged view of a part of the rotary tiller R ₁ of FIG. 1, and FIG. 5 is a rear view of the rotary tiller R ₁ mainly showing the power transmission mechanism. 1 to 4, at the front end portion of the rotary tiller R ₁ , _one upper first connecting tool 1 arranged on the left and right center lines C 1 and the left and right with respect to the center line C ₁ A pair of lower second connecting tools 2 arranged at symmetrical positions is provided, and one top link mounted on the rear part of the tractor T is provided on each of the first and second connecting tools 1 and 2. 3 and a pair of lower links 4 are connected to each other, and the rotary tiller R ₁ is attached to the rear portion of the tractor T via the three links 3 and 4.

Also, the PTO shaft of the tractor T (not shown)
And the input shaft 6 of the gear box 5 mounted in the central portion in the left-right direction of the rotary tiller R ₁ are connected via a first universal joint J _1, and the power of the tractor T is supplied to the rotary tiller R _{1 by} a rotary shaft. It is configured to be transmitted to the left and right tillage shafts S ₁ and S ₂ . Further, the frame F of the rotary tiller R ₁ includes a pair of frame rods 7 arranged at predetermined intervals along the traveling direction P of the tractor T.
And a pair of connecting plates 8 connecting both ends of each frame rod 7, and a pair of power transmission cases 9 integrally provided at both ends of the pair of frame rods 7.

As shown in FIGS. 4 and 7, the pair of left and right tillage shafts S ₁ and S ₂ which constitute the rotary tiller R ₁ of the present invention are arranged in a gentle C shape in plan view. Therefore, its axis is inclined at a slight inclination angle (θ) with respect to the horizontal line L orthogonal to the traveling direction P of the rotary tiller R ₁ (or tractor T). For this reason, as shown in FIG. 4, a pair of left and right power transmission cases 9 supporting the cultivating shafts S ₁ and S ₂ at the output shaft 11 at the lower end.
Is inclined with respect to the center line C ₁ of the rotary tiller R ₁ so that its extension line is V-shaped in a plan view. The pair of connecting plates 8 are arranged in the width direction of the power transmission case 9 (“oblique front-back direction” when viewed from the entire rotary tiller R ₁ ). The pair of front and rear frame rods 7 connected to each other is orthogonal to the center line C ₁ of the rotary tiller R ₁ .

The pair of left and right tillage shafts S ₁ and S ₂ are connected to each other by fitting the outer shafts 12 into both ends of the output shaft 11 (see FIG. 3) of the power transmission case 9. The nail attachment A is attached to the. The claw attachment A has a structure in which a plurality of plowing claws N are attached to a rectangular tube body 13 fitted on the outer side of the outer shaft 12. Therefore, each of the cultivating shafts S ₁ and S ₂ is supported only at the lower end of the power transmission case 9 at the center thereof.
The left and right parts are supported in a cantilever shape.

Further, as shown in FIG. 5, the gearbox 5 outputs the power transmitted to the input shaft 6 via the bevel gear 14a and another bevel gear 14b meshed with the bevel gear 14a. 15 can be output. Further, the respective input shafts 16 at the upper ends of the pair of power transmission cases 9 arranged at the left and right symmetrical positions of the frame F and the output shaft 15 of the gearbox 5 have their axes centered at the inclination angle (θ). ) Intersect and do not exist on the same straight line, they are connected to each other via the second universal joint J ₂ . That is, both ends of the output shaft 15 are connected to the input shaft 16 of each power transmission case 9 via the second universal joint J ₂ . Further, each of the pair of left and right power transmission cases 9 has the input shaft 16 inside.
And the output shaft 11 are attached with chain gears 17 and 18, respectively, and the chain 19 is attached to the chain gears 17 and 18, respectively, and the second universal joint J is connected from the output shaft 15 of the gear box 5 to the input shaft 16. _The power transmitted via ₂ is transmitted to each of the tilling shafts S ₁ and S ₂ .

As described above, by using the second universal joint J ₂ , the respective input shafts 16 of the pair of power transmission cases 9 and the respective output shafts 15 of the gearbox 5 intersect at the inclination angle (θ). Even if it does, power can be transmitted. As a result, the power taken out from the PTO shaft of the tractor T is transmitted to the first universal joint J ₁ , the gear mechanism in the gear box 5, the pair of second universal joints J ₂ and the chain gear mechanism in the pair of power transmission cases 9. A large number of tillage claws N, which are transmitted to the left and right tillage shafts S ₁ and S ₂ via the shafts and are attached to the respective tillage shafts S ₁ and S ₂ , are driven to rotate in the down-cut direction, and before the ridge formation. Loosen the soil. In FIG. 1, C ₂ indicates the left and right center lines of the tractor T, and when the rotary tiller R ₁ is mounted on the rear portion of the tractor T, the center lines C ₁ and C ₂ match each other. .

At the rear part of the rotary tiller R ₁ , a ridge molding plate D is arranged along a lateral direction (horizontal direction) U which is orthogonal to the traveling direction P of the tractor T, and a pair of mounting tools 21 are interposed therebetween. The frame F of the rotary tiller R ₁
Are linked to. The ridge molding plate D is divided into two parts in the longitudinal direction (the lateral direction U orthogonal to the advancing direction P of the tractor T in the molding state), and the ridge width to be molded is adjustable. Further, a cover 22 is attached to the frame F of the rotary tiller R _{1 so} that all the tillers N attached to the pair of left and right tiller shafts S ₁ and S ₂ are covered from above.

The power of the PTO shaft of the tractor T is transmitted to the pair of left and right tillage shafts S ₁ and S ₂ via the above-described transmission mechanism, and the tiller shafts S ₁ and S ₂ rotate in the downcut direction. As a result, the soil in the ridge forming planned portion B ′ immediately before the ridge forming is softened. Here, in the present invention, the left and right centerlines C of the rotary tiller R ₁ are arranged so that each of the pair of left and right tillage shafts S ₁ and S ₂ has a gentle C shape in a plan view.
_Since they are inclined in opposite directions with respect to the horizontal line L orthogonal to ₁ by a slight inclination angle (θ), they are attached to the left and right tillage shafts S ₁ and S ₂ as shown in FIG. The soil that has been softened by a large number of tillers N is released toward the oblique rearward Q ₂ slightly facing the center line C ₁ . Therefore, as shown in FIG. 7, each of the left and right tillage axes S ₁ , S
_{Since the} soils softened by the large number of plowing nails N attached to ₂ are gathered together on the side of the center line C ₁ , as shown in FIG. The soil in the ridge forming portion B'is slightly high in height.

As described above, since the ridge forming portion B'immediately before the ridge formation which has been softened is slightly raised in height, the ridge forming plate D produces the target shape [example shown in FIG. 10 (b)]. Then, the ridge B having a slightly middle height] is easily formed. In addition, the width W of the ridge B to be formed changes the width of the ridge forming plate D having a two-divided structure, and correspondingly, the claws mounted on the outer sides of the left and right tillage shafts S ₁ and S ₂ respectively. This can be easily handled by changing the length of the attachment A.

Subsequently, the invention of claim 4 will be described.
To do. FIG. 8 is a schematic view of the power transmission mechanism of FIG.
Rotary tiller R related to Ming₂9 is a rear view of FIG.
Is a rotary tiller R₂A pair of left and right tillage
Axis S₁₁, S₁₂3 is a plan view showing the arrangement of FIG. From claim 4
Rotary tiller R related to Ming₂Is two tillage axes
S ₁₁, S₁₂Is supported at both ends, and is it one end (inner end)?
It is a side drive system that is supplied with power from
Only said rotary tiller according to the invention of claim 1.
R₁Unlike two tillage axes S₁₁, S₁₂Has a plan view
And the configuration is arranged in a gentle C shape.
It Therefore, the rotary tiller according to the invention of claim 4
R₂Regarding the explanation of the above, the above-mentioned rotary tiller R₁
The same symbols are attached to the same parts as
Explain only.

That is, as shown in FIG.
The power transmission case 31 is attached to the central portion in the horizontal direction in a hanging state, and the shaft support bodies 32 are attached to both end portions in the horizontal direction in the same state. Also,
An output shaft 33 composed of a third universal joint J ₃ is supported at the lower end of the power transmission case 31,
A chain gear 34 attached to the output shaft 33 and an output shaft 15 'supporting the bevel gear 14b in the gear box 5'.
A chain 36 is hung between the chain gear 35 supported by. Further, the third universal joint J ₃ constituting the output shaft 33 has joint portions J ₃ a at both ends thereof, and each joint portion J ₃ a is arranged in a gentle V shape in a plan view. The inner ends of the two tillage shafts S ₁₁ and S ₁₂ are connected in the power transmission case 31. The outer ends of the two tillage shafts S ₁₁ and S ₁₂ are pivotally supported by the shaft support 32 which is attached to both lateral ends of the frame F in a suspended state. As a result, the two tillage axes S ₁₁ ,
Both ends of S ₁₂ are supported at both ends by the shaft support 32 and the power transmission case 31, and power is supplied from the inner end of the S ₁₂ [however, the output shaft (third universal It can be said that it is a center drive system when the two tillage shafts S ₁₁ and S ₁₂ connected via the joint J ₃ ) are regarded as one tiller shaft.

Therefore, the power of the PTO shaft of the tractor T is transmitted through the first universal joint J ₁ , the gear mechanism in the gearbox 5 ', the chain gear mechanism in the power transmission case 31, and the third universal joint J _3. It is transmitted to the two tillage shafts S ₁₁ and S ₁₂ . The tillage axes S ₁₁ and S ₁₂ rotate in the downcut direction, and the soil softened by a large number of tillage claws N attached to each tillage axis S ₁₁ and S ₁₂ is the center line of the rotary tiller R ₂ . The effect of being released toward the obliquely rearward Q ₂ slightly facing the side of C ₁ and causing the ridge forming planned portion B ′ to have a slightly middle height is as described above.

In each of the above-mentioned embodiments, the tilling shafts rotate in the down-cut direction, and in this case, the two tilling shafts are arranged in a gentle V shape in a plan view. However, when the tillage axis rotates in the up-cut direction, most of the soil that has been softened is thrown forward, so the two tillage axes are inverted in a plan view. When placed, the plowed soil is slightly centered.

The tilted biaxial power transmission means for connecting the tilted and intersecting two shafts to transmit power is not limited to the above universal joint.

[0028]

According to the rotary tiller according to the present invention, the soil which has been softened by the large number of tillers attached to each tiller is directed toward the left and right centerlines of the rotary tiller. It is thrown diagonally behind. in this way,
The soil that has been loosened by a large number of tillers is thrown from the left and right sides of the rotary tiller to the oblique rear toward the center line side, and is gathered to the center side of the ridge formed immediately after that. Therefore, the ridge of the target shape is easily formed by the ridge forming plate.

[Brief description of drawings]

FIG. 1 is a rotary tiller R _{1 according} to the invention of claim _1.
FIG. 7 is a plan view showing a state in which is attached to the rear of the tractor T.

FIG. 2 is a side view of the same.

FIG. 3 is an enlarged rear view of the same.

FIG. 4 is an enlarged view of a portion of the rotary tiller R ₁ of FIG.

FIG. 5 is a rear view of the rotary tiller R ₁ mainly showing the power transmission mechanism.

FIG. 6 is a plan view showing an arrangement of a pair of left and right tillage shafts S ₁ and S ₂ that constitute a conventional rotary tiller R ′.

FIG. 7 is a rotary tiller R according to the invention of claim 1.₁
Left and right pair of tilling shafts S ₁, S₂Plane showing the placement of
It is a figure.

FIG. 8 is a rear view of the rotary tiller R _{2 according} to the invention of claim 4 mainly showing the power transmission mechanism.

FIG. 9 is a rotary tiller R according to the invention of claim 4;₂
Left and right pair of tilling shafts S ₁₁, S₁₂Flat showing the placement of
It is a side view.

10 (a) and 10 (b) are transverse cross-sectional views of a ridge forming portion B'and a formed ridge B immediately before ridge forming, which are softened by the tilling claw N, respectively.

[Explanation of symbols]

C ₁ : Left and right centerlines of the rotary tiller F: Frame of the rotary tiller J ₂ : Second universal joint (tilted biaxial power transmission means) J ₃ : Third universal joint (tilted biaxial power transmission means) L: Horizontal line orthogonal to the left and right center lines of the rotary tiller N: tilling claws R ₁ , R ₂ : rotary tillers S ₁ , S ₂ , S ₁₁ , S ₁₂ : tiller shaft T: tractor (motor vehicle) θ: tiller shaft Inclination angle 5: Gearboxes 9, 31: Power transmission case (shaft support) 32: Shaft support

Claims (4)

[Claims] 1. A shaft support is attached to a lower surface of a frame in a suspended state, and a large number of tillage claws are attached to a tiller shaft horizontally supported by the support, and the power is supplied from a power vehicle such as a tractor. A rotary cultivating device configured to drive and rotate a cultivating shaft and cultivate by each cultivating claw, wherein a pair of left and right shaft supports are attached to the frame, and each shaft support has two independent shaft supports. The cultivating shaft is slightly inclined with respect to the horizontal line orthogonal to the left and right center lines so that it has a gentle hump shape or an inverted hump shape in plan view corresponding to the rotation direction, and the center drive A rotary tiller, which is characterized by being supported as a system. 2. The power input to the gear box installed on the frame from the power train is transmitted to the left and right power transmission cases forming the shaft support through a pair of left and right inclined biaxial power transmission means. The rotary tiller according to claim 1, wherein the two tillage shafts are driven to rotate by being transmitted to the input shaft of the rotary tiller. 3. The rotary tiller according to claim 2, wherein the inclined biaxial power transmission means is a universal joint. 4. A shaft support is attached to a lower surface of a frame in a suspended state, and a large number of tillage pawls are attached to a tiller shaft horizontally supported by the support, and the shaft is supported by the power of a power vehicle such as a tractor. A rotary cultivating device configured to drive and rotate a cultivating shaft and cultivate with each cultivating claw, wherein a shaft support is attached to a total of three positions of a central portion and both end portions in the left-right direction of the frame, and left and right independent The two cultivated shafts are slightly inclined with respect to the horizontal line orthogonal to the left and right center lines so that the two cultivated shafts have a gentle hump shape or an inverted hump shape in plan view corresponding to the rotation direction. And the inner ends thereof are respectively connected to both ends of the output shaft of the power transmission case constituting the shaft support of the central portion through the inclined biaxial power transmission means, and the outer ends thereof are , Are supported by the shaft supports at both ends, and Rotary tiller, characterized in that has a drive system.