JPH06343301A - Rotary tiller - Google Patents

Abstract

PURPOSE:To satisfactorily till using a rotary tiller of a partially reversible system while accurately suppressing dash of a machine body in a state reduced in required power even in the case of hard field. CONSTITUTION:A shaft cylinder 2 having short claws is rotatably supported and placed in the lateral side part of a tilling transmission case 1 and a shaft cylinder 4 having long claws is fitted and fixed in the extended part of a tilling driving shaft 3 supported through the central part of the short claw shaft cylinder 2 to the tilling transmission case 1 and the tilling driving shaft 3 and the shaft cylinder 4 having long claws are driven by up cut rotation using a main transmission system A and the shaft cylinder 2 having short claws is driven by a branched transmission system B interlocking with the main transmission system A to constitute the rotary tiller. Further, a normal or reverse rotation changeover mechanism C is assembled into a main transmission A and as necessary, the tilling driving shaft 3 and the shaft cylinder 4 having long claws are driven by up cut rotation and the shaft cylinder 2 having short claws is driven by down cut rotation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a short claw shaft cylinder disposed on the lateral side of a tillage transmission case and a long claw shaft cylinder disposed adjacent to the short claw shaft cylinder. Partial reversal method, which is configured to rotate while driving in the direction, and to cultivate while suppressing the dash phenomenon of the aircraft by the anti-rotation of the tilling claw attached to the short claw shaft cylinder and the tilling claw fixed to the long claw shaft cylinder The present invention relates to a rotary cultivator.

[0002]

2. Description of the Related Art The above-mentioned partial reversal type rotary tiller is already known, for example, from Japanese Patent Publication No. 46-39041.
The tillage claw attached to the long claw shaft cylinder rotates down cut,
The tilling claws attached to the short claw shaft cylinder were up-cut rotating.

[0003]

In the conventional partially reversing type rotary tiller, the most part of the total tillage width is tilled by the tiller claws rotating in the same direction as the traveling wheels, that is, the downcut rotation, and the tiller is tilled. Since only the part near the transmission case was cultivated with the tilling claws that rotate upcut,
In fields with a certain degree of hardness, it is possible to prevent the dash phenomenon of the machine body, but when plowing hard soil such as clayey dry soil, it is possible to suppress the dash phenomenon accurately. There was a problem that I could not hope. The present invention is
It was made in view of such problems, and the purpose is to achieve a partial reversal method that can properly suppress the dash phenomenon of the airframe even in a field of hard soil with a small required power. To provide a rotary cultivator.

[0004]

In order to achieve the above object, a rotary tiller according to the present invention comprises a tiller transmission cable.
A short pawl shaft cylinder 2 is rotatably supported on the lateral side of the stool 1, and the cultivating drive shaft 3 supported on the cultivating transmission case 1 is extended through the center of the short pawl shaft cylinder 2. Long nail shaft cylinder 4
Is fitted and fixed, the plowing drive shaft 3 and the long pawl shaft cylinder 4 are driven by the main transmission system A in up-cut rotation, and the short pawl shaft cylinder 2
Is configured to be driven for down-cut rotation by a branch transmission system B that is interlocked with the main transmission system A. Then, a forward / reverse switching mechanism C is incorporated in the main transmission system A for driving the tillage drive shaft 3 and the long claw shaft cylinder 4, and the long claw shaft cylinder 4 is downcut-rotated by switching the mechanism, thereby making the short claw shaft cylinder. 2 can be configured to rotate upcut.

[0005]

In the rotary cultivating apparatus constructed as described above, only the portion close to the cultivating transmission case 1 is cultivated by the cultivating claw of the short claw shaft cylinder 2 which rotates downcut, and the other cultivating width. Most part of the long claw shaft cylinder 4 that is up-cut rotated
Since it is cultivated by the cultivating claw, even when cultivating a hard field, good cultivating can be performed while properly suppressing the dash phenomenon of the airframe in a state where the required power is small. When the forward / reverse switching mechanism C is incorporated in the main transmission system A for driving the tillage drive shaft 3 and the long claw shaft cylinder 4,
By switching the forward / reverse switching mechanism C in accordance with the hard / soft condition of the field, the plowing pawl of the long pawl shaft cylinder 4 is downcut-rotated, and the plowing pawl of the short pawl shaft cylinder 2 is upcut-rotated to perform plowing. You can also

[0006]

Embodiments of the present invention will now be described with reference to the drawings. The drawings are configured as a center-drive type rotary cultivator for a cultivator having a claw shaft cylinder for residual tillage treatment. An example is shown.

In FIG. 1, the cultivator is a missile cage.
The engine 6 is mounted on the frame extending from the space 5, and the power of the engine 6 is transmitted to the axle supported on the lower part of the mission case via the transmission mechanism in the mission case 5 and fitted to the axle. It is configured to drive the left and right wheels 7, 7 to travel. A rotary tiller is detachably attached to a rear portion of the mission case and below the steering handle 8 so that the steering handle 8 extending from the mission case 5 is configured to be operated. Is equipped with.

The rotary cultivator comprises a mission case 5
And a plowing depth setting device 10 installed at the rear end of the tiller frame 9, and the lower end of the tilling transmission case 1. A plowing drive shaft 3 orthogonal to the traveling direction is horizontally supported horizontally, and the plowing drive shaft 3 is connected to the PTO of the mission case 5.
It is adapted to be driven by a main transmission system A which is interlockingly connected to the shaft 11.

In FIG. 2, the main transmission system A passes through a forward / reverse switching mechanism C and a forward / reverse switching mechanism C housed in a case 12 attached to the upper lateral side of the tillage transmission case 1. In order to transmit power to the cultivating drive shaft 3, it is composed of a chain transmission mechanism 13 housed in the cultivating transmission case 1.

[0010] To further explain, the mission case
The PTO shaft 11 projecting laterally from the case 5 penetrates the upper part of the tillage transmission case 1 and extends into the case 12,
A forward rotation transmission system 15 and a reverse rotation transmission system 16, 17, 18 and 15 are formed between the PTO shaft 11 and an idle shaft 14 provided in parallel with the space between the transmission systems. Switching body 19 slidably provided on the PTO shaft 11
Is selectively coupled to both transmission systems so that the rotation direction of the chain transmission mechanism 13 can be changed. Further, the chain transmission mechanism 13 has a PT
A chain 22 is hung between an upper sprocket 20 which is rotatably supported by the O shaft 11 and is provided so as to be interlockingly connectable to both transmission systems, and a passive sprocket 21 which is wedged on the side of the cultivating drive shaft 3. It is configured.

The tilling drive shaft 3 is provided so as to project from the tilling transmission case 1 to the left and right, and the projecting portions thereof are support cylindrical portions mounted on the left and right lateral side portions of the tilling transmission case 1. 23,
It is further projected outward through the central portion of 23, the long claw shaft cylinders 4, 4 are detachably fitted to the respective protrusions, and the inclined outer diameter portions of the support cylindrical portions 23, 23 are Short claw shaft cylinders 2, 2 are rotatably equipped. Further, a group of forward / reverse cultivating claws 24 is attached to the outer circumferences of the left and right long claw shaft cylinders 4 and 4 in a predetermined arrangement. , 25 are attached in a predetermined arrangement.

The short claw shaft cylinders 2, 2 are adapted to be driven in the opposite direction to the tilling drive shaft 3 by a branch transmission system B which is constructed in conjunction with the main transmission system A, and the branch thereof. The transmission system B is configured as described below. A sprocket 27 is wedged on a rotary shaft 26 parallel to the cultivating drive shaft 3, and the sprocket 27 is located inside the winding of the chain 22 of the main transmission system A and is engaged with the loose side of the chain 22. It is designed to rotate clockwise (b) as shown in.

At both right and left sides of the sprocket 27,
Gears 28, 28 are fitted and fixed to the rotary shaft 26, and the respective gears 28, 28 are rotatably externally fitted to the cultivating drive shaft 3 and rotatably internally fitted to the inner diameter portions of the support tubular portions 23, 23. Gears 30 and 30 which are always meshed with the driven gears 29 and 29 provided at the outer ends of the bosses of the driven gears 29 and 29, respectively. The refracting power transmission portion is configured by meshing with the passive gears 31, 31 formed in the above. In addition, 32 is a chain tension mechanism.

The forward / reverse switching mechanism may not be attached to the tillage transmission case 1 but may be configured to switch the rotation direction of the PTO shaft 11 itself on the mission case 5 side. In addition, the main transmission system A and the branch transmission system B
The specific structure of the above is not limited to that shown in the figure, and in short, any other modified configuration can be used as long as the long claw shaft cylinder 4 and the short claw shaft cylinder 2 can be rotationally driven in the opposite direction. You can do it. Further, in the embodiment of FIGS. 1 to 3, the short claw shaft cylinder 2 is provided as an inclined claw shaft cylinder for residual tillage treatment.
The short claw shaft cylinder 2 may be provided in a horizontal state in which the axial center of the short claw shaft cylinder 2 coincides with that of the long claw shaft cylinder 4.

In the rotary cultivator constructed as in the embodiment, when the cultivating work is performed under the condition that the forward rotation transmission system 15 of the forward / reverse rotation switching mechanism C is connected, the chain transmission mechanism is used. 13 rotates in the direction (a) of FIG. 3, and the cultivating drive shaft 3 and the long claw shaft cylinders 4 and 4 fitted and fixed thereto are shown in FIG.
By rotating in the clockwise direction (B) shown in (4), the tilling claw group 24 attached to the long claw shaft cylinders 4 and 4 is driven into the soil by the upcut rotation. While the long claw shaft cylinders 4 and 4 are rotated as described above, the left and right short claw shafts are driven by the power transmitted from the rotary shaft 26 through the gear 28 and the driven gear 29 and the gear 30 and the passive gear 31. The cylinders 2 and 2 are rotated in the counterclockwise direction (C) shown in FIG.
The tillage claw 25 attached to 2 is driven into the soil in the downcut rotation.

However, if necessary, the forward / reverse rotation switching mechanism C is switched so that the reverse rotation transmission systems 16, 17, 18 and 15 are in a transmission state, and the chain transmission mechanism 13 is operated.
Is rotated in the opposite direction to the above, that is, in the direction opposite to the (a) direction, the plowing claw group 24 attached to the long claw shaft cylinders 4, 4 is downcut-rotated, and It is possible to perform the tilling work in which the tilling claws 25 attached to the short claw shaft cylinders 2 and 2 are upcut-rotated and driven into the soil.

FIG. 4 shows a cultivator to which another embodiment of the present invention is applied. In this embodiment, FIGS.
Compared with the embodiment of FIG. 3, the forward / reverse switching mechanism provided in the main transmission system is omitted, but the long claw shaft cylinders 4 and 4 and the short claw shaft cylinders 2 and 2 are shown in FIGS. 2 and 3. It is driven by a transmission structure similar to that of the embodiment, and the tilling claws of the long claw shaft cylinders 4 and 4 always rotate upcut (U), and the short claw shaft cylinders 2 and 2 are cultivated. Since the claws are designed to rotate downcut (D), and the long claw shaft cylinder 4 and the short claw shaft cylinder 2 rotate in one direction, the cultivating claws attached to them are both forward and reverse cultivating plates. General plowing nails are used instead of nails. Therefore, since the forward / reverse switching mechanism is omitted and a general tilling claw may be used, the structure shown in FIG.
~ The structure is simple and inexpensive compared to the embodiment of Fig. 3.

Further, FIG. 5 shows a side drive type roller.
1 shows an example in which the present invention is applied to a tarry tiller.
That is, at the left and right ends of the long pawl shaft cylinder 4 which is rotationally driven in the upcut direction by the main transmission system housed in the cultivating transmission case 1, the branch transmission system interlocked with the main transmission system is turned in the opposite direction. It is assumed that the rotatably driven short claw shaft cylinders 2 are supported in a horizontal state concentric with the long claw shaft cylinder 4.

Also in the embodiment of FIG. 5, the main transmission system may be provided with a forward / reverse switching mechanism as in the embodiments of FIGS. 1 to 3, and the forward / reverse switching may be performed as in the embodiment of FIG. The mechanism may be omitted, and the short claw shaft cylinders 2, 2 are provided in a tilted manner as in the embodiment shown in FIGS. 1 to 3, and are provided outside the respective short claw shaft cylinders 2. It is also possible to additionally perform the residual tillage treatment under the tilling power transmission case or the supporting frame located. And, the practice of the present invention is not limited to the cultivator, but to the rotary cultivating device of a relatively small passenger tractor, or an axle type working machine that shares the axle as a cultivating drive shaft, such as a management machine. Can also be applied.

[0020]

According to the rotary cultivator according to the first aspect of the present invention, the short pawl shaft cylinder 2 is rotatably supported on the lateral side of the cultivating power transmission case 1 and the short pawl shaft cylinder 2 is rotatably supported. A long pawl shaft cylinder 4 is fitted and fixed to an extending portion of a cultivating drive shaft 3 which is supported by the cultivating power transmission case 1 through a central portion, and the cultivating drive shaft 3 and the long pawl shaft cylinder 4 are main transmission systems. In the case of plowing a hard field, by driving A for upcut rotation and A for driving the short claw shaft cylinder 2 for downcut rotation by the branch transmission system B interlocking with the main transmission system A. However, it is possible to perform good plowing while accurately suppressing the dash phenomenon of the airframe because the required power is small.

In the rotary cultivator according to the second aspect of the present invention, the short pawl shaft cylinder 2 is rotatably supported on the lateral side of the cultivating power transmission case 1 and the central portion of the short pawl shaft cylinder 2 is provided. The long pawl shaft cylinder 4 is fitted and fixed to the extending portion of the cultivating drive shaft 3 supported by the cultivating power transmission case 1 through the cultivating power transmission case 1.
Is driven by the main transmission system A, and the short claw shaft cylinder 2 is driven by the branch transmission system B interlocking with the main transmission system A. Since the reverse rotation switching mechanism C is incorporated, it is of course possible to cultivate a hard field satisfactorily while properly suppressing the dash phenomenon of the machine under a condition that the required power is small, and in some cases, the long claw shaft may be cultivated. Rotate the cylinder 4 down-cut,
Since the short claw shaft tube 2 can be upcut-rotated to cultivate, the adaptability to different field conditions is expanded, and the cultivating work can be preferably performed.

[Brief description of drawings]

FIG. 1 is a side view of a tiller equipped with a rotary tiller to which the present invention is applied.

FIG. 2 is a partial sectional view showing an essential part of the rotary cultivating apparatus according to the present invention.

FIG. 3 is a side sectional view showing a part of a transmission portion of the rotary cultivating device according to the present invention.

FIG. 4 is a side view of a tiller equipped with a rotary tiller according to a modified embodiment of the present invention.

FIG. 5 is a schematic view showing another modification of the present invention.

[Explanation of symbols]

 1 Tillage transmission case 2 Short pawl shaft cylinder 3 Tillage drive shaft 4 Long pawl shaft cylinder A Main transmission system B Branch transmission system C Forward / reverse switching mechanism

Claims (2)

[Claims] 1. A short claw shaft cylinder (2) is rotatably supported by a lateral side part of a cultivating transmission case (1) and passes through the center of the short claw shaft cylinder (2). The long pawl shaft cylinder (4) is fitted and fixed to the extension portion of the tillage drive shaft (3) supported on the transmission case (1), and the tiller drive shaft (3) and the long pawl shaft cylinder (4) are attached. The main transmission system (A)
It is characterized in that the short claw shaft cylinder (2) is driven by the branch transmission system (B) interlocking with the main transmission system (A) for the down cut rotation. Rotary tillage equipment. 2. A short pawl shaft cylinder (2) is rotatably supported by a lateral side part of a cultivating transmission case (1) and passes through the center of the short pawl shaft cylinder (2). The long pawl shaft cylinder (4) is fitted and fixed to the extension portion of the tillage drive shaft (3) supported on the transmission case (1), and the tiller drive shaft (3) and the long pawl shaft cylinder (4) are attached. The main transmission system (A)
And the short claw shaft cylinder (2) is driven by a branch transmission system (B) interlocking with the main transmission system (A).
The rotary cultivator according to claim 1, wherein the main transmission system (A) includes a forward / reverse switching mechanism (C).