JPS6135703A - Disc type rotary plow apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to a disc-type rotary tiller that performs tilling and leveling work by forcibly rotating a disc rotor including a plurality of tilling discs using a rotational driving force from the tractor side as a tractor working machine. BACKGROUND ART Conventionally, as the above-mentioned disc-type rotary cultivating device, those described in British Patent No. 857,923 or Japanese Utility Model Application Publication No. 57-54201 are known. This type of disc-type rotary tiller is equipped with a pair of left and right disc rotors each having a rotating shaft that is configured to transmit power using a center drive system to a mission device placed in the center of the width direction. By arranging the curved concave surfaces of the tilling discs of each disc rotor to face inward or outward from each other, the soil can be plowed into a high ridge shape or a broken ridge shape. By the way, with such a tilling device, each tilling disc is installed so that the curved concave surface faces inward, and the soil is tilled in a high ridge shape9.
When reversing, it is necessary to leave a required gap between the tilling discs on the inner end sides of the left and right disc rotors, so residual tillage occurs in the center of the tilling surface, and the disc rotor removes the soil there. There was an inconvenience in that it was pushed together and became locally high. Therefore, the present applicant installed a center tilling device at the front position between the inner ends of the left and right disc rotors, and carried out split tilling in which the tilled soil is dug in advance in the center of the tilling work surface where residual tillage occurs. We are proposing a method that eliminates the uncultivated area and creates a level finish in the center.

[Problems that the invention attempts to solve]

By the way, in the above-mentioned center tillage device, a pair of left and right rotating shafts are provided with a series of tilling claws or tilling discs each having the same rotation radius, and because the soil is divided and tilled at once by this series of tilling claws, etc., it is possible to change the field condition or The amount of load fluctuation due to changes in tillage depth is large, and therefore the amount of soil that is discharged to the side becomes unstable, resulting in an imbalance in the amount of soil processed by each tilling disc in the disc rotor placed at the rear. There was a problem in leveling the plowing surface.

[Means to solve the problem]

Therefore, the present invention aims to improve the finished state of the tilling work surface with the disc rotor by stabilizing the amount of lateral movement of tilled soil by the center tilling device as described above. The gist is that a plurality of tilling members such as tilling claws or tilling discs provided on a pair of left and right rotating shafts are arranged, each having a different rotation radius, and the one with the smaller rotation radius is located at the front.

[For use]

With such means, in the center tilling device, after the tilling member with a small rotation radius performs partial tillage of a predetermined amount, the rear tilling member with a large rotation radius is used to divide the remaining soil. Since the tillers share the intermediate tilling processing amount, the amount of variation in the load applied to each tilling member is also reduced, and the amount of discharged soil moved laterally by the center tilling device is stabilized. Therefore, in the disc rotor located behind the center tilling device, the amount of soil to be processed by each tilling disc is stabilized.

【Example】

Hereinafter, one embodiment of the present invention will be described with reference to the drawings. In FIGS. 3 and 4, the symbol A indicates a tractor, and the symbol B indicates a disc-type rotary tiller towed by the tractor A. This disc-type rotary tiller B has a mission of the mission device 1 in the center portion in the width direction. A case 11 is provided, and this mission case 11 is connected to a three-point link hitch mechanism C of a tractor A via a connecting member such as a mast 12 attached thereto, so that it can be towed by the tractor A and can be raised and lowered as appropriate. It has become. In addition, an input shaft 13 is provided to protrude forward from the mission case 11, and this is connected to the PTO on the tractor A side via the drive shaft 14.
By being connected to the shaft, it receives rotational driving force from the tractor A. The mission device 1 is configured to transmit power to a disc rotor, which will be described later, via a side drive type transmission system 2, and a pair of output shafts 15 and 15 are protruded from both left and right sides of the mission case 11. Hinge support brackets 16.16 that cover the top and bottom of these are protruded from side to side. On the other hand, there is a universal joint 2 on the output shaft 15.15.
A pair of left and right power transmission frame pipes 23.23 rotatably support a power transmission shaft 22.22 connected via 1.21.
will be provided. This transmission frame pipe 23 has hinge support brackets 24, 24 fixedly attached to each inner end.
are connected and supported by the hinge support brackets 16.16 via vertical pins 25.25, and protrude approximately horizontally from the left and right rear sides of the mission case 11, and the vertical shaft pins 25. ', 25 is the universal joint 21.21
By being aligned with the center of the It can swing back and forth in a substantially horizontal plane together with the transmission shaft 22. The upper end of a chain case 26.26 containing a chain transmission mechanism interlocked with the transmission shaft 22.22 is fixed to the outer ends of the left and right power transmission frame pipes 23.23, so that approximately A gate-shaped transmission system is constructed. Here, a pair of left and right disc rotors 3.3 are arranged below the left and right transmission frame pipes 23.23. In this disc rotor 3, a rotary shaft 32 passes through the center of a plurality of (in this embodiment, two) tilling discs 31, 31 each having a shallow bowl-shaped disc shape, and the tilling discs 31, 31 are inserted into a predetermined position. These disc rotors 3.3 are fixed with the hitches spaced apart and their curved concave surfaces aligned in the same direction, and such disc rotors 3.3 align the curved concave surfaces of each tilling disc 31 toward the center of the device below the mission case 11. It is placed towards the target. These disc rotors 3, 3 support the outer ends of the rotating shafts 32.32 on the lower ends of the chain case 26.26, respectively, and connect the internal chain transmission.
A support arm is configured to transmit power to the transmission shafts 22.22 through drive grooves, and the inner end of the rotary shaft 32.32 is fixed to the inner end of the transmission frame pipe 23.23 and extends downward therefrom. By being rotatably supported by gear cases 41 and 41 fixedly installed at the lower end of the transmission device 27 and 27, the transmission device 1 is forcibly driven to rotate in the forward direction. Reference numeral 5 in the figure represents a pair of left and right gauge wheel devices that are attached to the chain case 26, 26 and supported at a predetermined height on the field. It is designed to do this. In addition, reference numeral 6 indicates that the disc rotor 3
, 3 to a predetermined value. Here, a pair of center tilling devices 4, 4 on the right side are provided at a front position between the inner ends of the disc rotors 3, 3. As shown in FIG. 1, this center tilling device 4.4 has a rotating shaft 43.43 that is rotatably supported by a bearing nozzle 42.42 on the mission case 11 side and projects forward.
, and these are unit-surgery joints 44.44
The output shaft 45.45 of the gear case 41゜41 through
This output shaft 45.45 is connected to the gear case 41.
The disc rotor 3,
The rotation shaft 4 is configured to transmit power to the rotation shaft 32.
3.43 is designed to be rotated in the direction of the arrow. Cultivating members 46 and 47 each having tilling claws attached radially to these rotating shafts 43 and 43 are arranged such that the tilling member 46 with a small rotation radius is arranged in the front, and the tilling member 47 with a larger rotation radius is arranged in the rear. They are installed in two rows, front and rear. The rear left and right tilling members 47.47 are rotated so that their respective tilling claws are fixed to the rotating shafts 43.43 with their phases shifted from each other, so that their rotation trajectories partially overlap. . In the above configuration, the left and right disc rotors 3.3 are rotated at a predetermined speed in the forward direction with respect to the traveling direction of the tractor A by driving the PTOIIID on the tractor A side, and the rotation shafts 32 of the disc rotors 3, 3 are The rotary shafts 43.43 of the left and right center cultivating devices 4.4 are driven to rotate in the direction of the arrow in FIG. As the tractor A moves forward, the disc-type rotary tiller B pulled by the tractor A uses the tiller member 46, 46 of the center tiller 4.4, which has a small rotation radius, to plow the soil approximately in the center in the left-right direction of the tilling surface. A predetermined amount of soil is dug up (part A in Figure 2) and discharged to the left and right sides, and the tilling member 47.47 with a large rotation radius at the rear digs up the remaining soil (opening part in Figure 2). This is discharged to the left and right sides, and as a result, intermediate tilling is performed in advance between the inner ends of the left and right disc rotors 3, 3. Then, the left and right pair of disc rotors 3, 3 at the rear of the field, which has been tilled in the middle, turns over the plowing 9 and tills the soil, and the left and right disc rotors 3.3 move the soil to the center. The soil is backfilled in the middle tilled area and finished level without causing local elevation. Here, the soil discharged to the left and right by intermediate tilling is reversed by each rear tilling disc 31, so if there is a variation in the amount of discharged soil held by each tilling disc 31, it will not be possible to maintain a level tilling surface. can't get it. However, in the center tillage systems H4 and 4, the two front and rear tillage members 46.47 share the intermediate tillage throughput, so each tillage member 46.47 also handles the amount of load fluctuation due to changes in field conditions or tillage depth. The cultivation members 46 are now divided into
．． In No. 47, the amount of load fluctuation is reduced compared to the conventional single-connection type. Therefore, the movement amount (throwing distance) of the soil discharged laterally by each tilling member 46, 47 is also stabilized, and thereby the amount of soil to be processed by each rear tilling disc 31 is also stabilized, so that the soil is evenly distributed. A flat plowing surface can be obtained. In addition, the ratio of the intermediate tillage processing amount shared by the tillage members 46 and 47 before and after the center tillage device 4 is in the range of 3 to 4:6, and the ratio of the amount of soil moved to each side is also similar to this. Practically speaking, it is preferable that the plowing members 4G fall within the same range. A turning radius of 47 is set. FIG. 5 is a skeleton diagram showing another embodiment of the present invention. In this example, the left and right center tilling devices 7. Rotationally driven by a separate chain transmission mechanism. That is, the transmission case 11 is provided with a transmission chain case 71 extending downward, and at the lower end of the transmission chain case 11, a pair of left and right rotating shafts 72 and 72 rotatably supported by the transmission chain case 11 extend diagonally forward. This protrudes and is configured to be transmitted to the mission device 1 via an appropriate transmission system within the transmission chain case 71 so as to be rotationally driven in the direction of the arrow. Further, tilling members 73 and 74 consisting of two sets of front and rear tilling claws similar to those in the above-mentioned embodiment are respectively attached to such rotating shafts 72 and 72, and the front tilling member γ3 having a small rotation radius performs a predetermined amount of intermediate tilling. Afterwards, the rear tilling member 74 processes the remainder. This embodiment also has front and rear tilling members 13. γ4 is the sixth
As shown in the figure, since the amount of tillage is shared, the amount of soil that is discharged to the side is stabilized as described above.
The tilling work surface by the left and right disc rotors 3, 3 is finished evenly. Although the tilling members 73 and 74 shown in FIG. 5 are composed of tilling claws attached radially to the rotating shaft 72, they may be composed of tilling discs instead, and a skeleton of this embodiment is shown in FIG. Illustrated in the diagram. Of course, in this case as well, in the left and right center tilling devices 8.8, the tilling disc 81 with a small radius is arranged at the front, and the tilling disc 82 with a large radius is arranged at the rear, and each of them is attached to the rotating shaft 83. 81 and 82 have curved concave surfaces facing outward in the left and right direction, and the soil that has been tilled in the middle by the front and rear tilling discs 81 and 82 is discharged to the left and right sides as shown in Fig. As in the embodiment, the rear left and right disc rotors 3 are used to provide a flat plowing surface. In addition, in the above embodiment, the tilling members provided in the center tilling device are arranged in two sets, front and rear, with different rotation radii.
It is not limited to two sets, but three or four sets may be arranged so that the turning radius increases from the front to the rear.

【Effect of the invention】

As explained above, according to the present invention, the central part of the tilling work surface between the inner ends of the left and right disc rotors is dividedly tilled in advance by the center tilling device. Not only does this eliminate the inconvenience of locally high soil, but it also stabilizes the amount of soil discharged by the center tilling device that is moved laterally, which reduces the amount of soil that must be processed by each tilling disk. Stabilization and therefore a level finish on the tilling surface.

[Brief explanation of drawings]

1 to 4 show an embodiment of the present invention; FIG. 1 is a skeleton diagram thereof, FIG. 2 is an explanatory diagram of its operation, FIG. 3 is a rear perspective view, and FIG. 4 is a plan view. 5 and 6 are skeleton diagrams and action explanatory diagrams showing other embodiments of the present invention, and FIGS. 7 and 8 are skeleton diagrams and action explanatory diagrams showing roughly other embodiments of the present invention. It is. A...Tractor, B...Disk type rotary tilling device, C...Three-point link hitch mechanism. D...PTO axis, 1...Mission device, 11...Mission case, 12...Mast, 13
...Input shaft, 14...Drive shaft, 15...
・Output shaft, 16... Hinge support bracket, 2... Transmission system, 21... Universal joint, 22... Transmission shaft, 23/969 Large 69 Ui7d Uto 8αD

Claims (1)

[Claims] It is equipped with a hitch mechanism attached to the tractor and a mission device that receives rotational power from the tractor side, and a pair of disc rotors with a plurality of tilling discs fixed to a rotating shaft that is transmitted to the mission device is rotated at a predetermined gang angle. In a disc-type rotary tilling device, the tilling discs are arranged symmetrically so that the curved concave surfaces of the tilling discs face inward; A pair of left and right center tillers are provided, and the tillers fixed to each rotating shaft of the center tiller are composed of a plurality of sets of tillers with different rotation radii, arranged so that the one with the smaller rotation radius is located at the front. A disc-type rotary tiller characterized by having a continuous structure.