JPH0459843B2 - - Google Patents

Description

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

The present invention relates to a disc-type rotary tilling device that performs tilling and leveling work by forcibly rotating a disc rotor including a plurality of tilling discs using rotational driving force from the tractor side as a tractor working machine.

[Conventional technology]

Conventionally, as the above-mentioned disc-type rotary tiller, those described in British Patent No. 857923 or Japanese Utility Model 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 rotary shaft that is configured to transmit power using a center drive system to a transmission device located at the center in the width direction. The concave curved surfaces of the tilling discs in each disc rotor are arranged inwardly or outwardly to plow and turn the soil into a high ridge shape or a broken ridge shape. By the way, when using such a tilling device and installing each tilling disk so that the curved concave surface faces inward to till and turn over the soil in a high ridge shape, there is a gap between the tilling disks at the inner ends of the left and right disk rotors. Since it is necessary to leave a required gap, the tilling occurs in the center of the tilling work surface, and the disc rotor collects the soil there, resulting in a local height. 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 intermediate tillage in which tilled soil is excavated in advance in the center of the tilling work surface where residual tillage occurs. We are proposing a method that eliminates the remaining plowed area and creates a level finish in the center.

[Problem to be solved by the invention]

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 this series of tilling claws etc. are used to till the soil at once, so it is possible to change the soil depending on the field conditions and tillage. The amount of load fluctuation due to changes in depth is large, resulting in the amount of soil movement and instability that is discharged to the side.
The amount of soil processed by each tilling disk in the rearwardly disposed disk rotor was unbalanced, which caused problems in leveling the tilling surface. The present invention has been made to solve the above problems.

[Means to solve the problem]

In order to achieve the above object, the present invention includes a hitch mechanism attached to a tractor and a transmission device that receives rotational power from the tractor side, and a plurality of tilling disks are fixed to a rotating shaft configured to transmit power to the transmission device. A pair of left and right disc rotors are arranged symmetrically so that they form a predetermined gearing angle and the curved concave surfaces of each tilling disc face inward. A pair of left and right center tilling devices are provided at a forward position between the inner ends of the pair of left and right disk rotors, and are fixed to each rotating shaft of the center tilling devices. This tilling member is characterized by having a plurality of sets of cultivating members with different rotation radii arranged in a multi-unit type in which the one with the smaller rotation radius is located at the front.

[Effect]

With the center tilling device of the present invention, by such means, the center tilling device can be easily provided at the front position between the inner ends of the left and right disc rotors,
After the tilling member with a small rotation radius of the center tilling device splits the soil by a predetermined amount, the rear tilling member with a large rotation radius splits the remaining soil.
Since multiple tilling members share the intermediate tilling throughput, 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 disk rotor disposed behind the center tilling device, the amount of soil to be processed by each tilling disk 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;
Reference numeral B indicates a disc-type rotary tiller towed by a tractor A, and this disc-type rotary tiller B has a milling device 1 at the center in the width direction.
A transmission case 11 is provided, and this transmission 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 to the transmission case 11, so that it can be towed by the tractor A, and can be pulled as appropriate. It is designed to be raised and lowered. Further, an input shaft 13 is drilled forward from the transmission case 11, and is connected to a PTO shaft D on the tractor A side via a drive shaft 14, so that rotational driving force from the tractor A can be received. The above-mentioned transmission device 1 is configured to transmit power to a disk rotor, which will be described later, via a side drive type transmission system 2, and a pair of output shafts 15, 15 are bored in the left and right sides of the mission case 11. Further, hinge support brackets 16, 16 covering the top and bottom of these are bored on the left and right sides. On the other hand, a universal joint 21 is attached to the output shafts 15, 15,
A pair of left and right transmission frame pipes 2 that rotatably support transmission shafts 22, 22 connected via 21.
3 and 23 are provided. The transmission frame pipe 23 is connected and supported to the hinge support brackets 16, 16 through vertical pins 25, 25 through hinge support brackets 24, 24 fixedly installed at the inner ends of each of the transmission frame pipes 23, so that the transmission frame pipe 23 can be connected to the left and right sides from the mission case 11. It protrudes approximately horizontally rearward and laterally, and is connected to the vertical axis pin 25,
25 is arranged in alignment with the center of the universal joints 21, 21, so that it can swing back and forth in a substantially horizontal plane together with the transmission shaft 22. The transmission shafts 22, 22 are attached to the outer ends of the left and right transmission frame pipes 23, 23.
By fixing the upper ends of the chain cases 26, 26, which have a built-in chain transmission mechanism linked to the
A roughly 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 (two in this embodiment) tilling discs 31, 31 that are shaped like shallow bowl-shaped discs, and the tilling discs 31, 31 are inserted into the center of the tilling discs 31, 31 in a predetermined position. These disc rotors 3, 3 are fixed with pitch intervals and curved concave surfaces aligned in the same direction, and these disc rotors 3, 3 align the curved concave surfaces of the respective tilling discs 31 toward the center of the device below the mission case 11. It is placed towards. These disc rotors 3, 3 support the outer ends of the rotary shafts 32, 32 on the lower ends of the chain cases 26, 26, respectively, and transmit power to the transmission shafts 22, 22, respectively, via an internal chain transmission mechanism. A gear case 41, in which the inner ends of the rotating shafts 32, 32 are fixed to the lower ends of support arms 27, 27, which are fixed to the inner ends of the transmission frame pipes 23, 23 and extend downward therefrom; 41, so that they are forcibly driven in the forward direction by the mission device 1. Note that the reference numeral 5 in the figure indicates the chain case 26,
This is a pair of left and right gauge wheel devices that are attached to the wheel 26 and supported on the field at a predetermined height, and the plowing depth of the disc rotors 3, 3 is adjusted by adjusting the height. Further, reference numeral 6 indicates that the disk rotors 3, 3 can be rotated by simultaneously adjusting the front and rear swing positions of the left and right transmission frame pipes 23, 23 in a symmetrical manner.
This is an adjustment link device that determines the gearing angle to a desired value. Here, a pair of left and right center tilling devices 4, 4 are provided at a front position between the inner ends of the disc rotors 3, 3. These center tilling devices 4, 4 are the first
As shown in the figure, rotating shafts 43, 43 are rotatably supported by bearing housings 42, 42 on the transmission case 11 side and protrude forward, and these are connected to the gear case 41 through universal joints 44, 44. , 41, and these output shafts 45, 45 are connected to the gear cases 41, 41.
The rotating shafts 43, 43 are driven to rotate in the direction of the arrow by being transmitted to the rotating shafts 32, 32 of the disk rotors 3, 3 through a reversing gear mechanism in 41. And these rotating shafts 4
Tilling members 46 and 47 each having tilling claws attached radially to 3 and 43 are arranged in two rows, with the tilling member 46 having a smaller rotation radius placed in the front and the tilling member 47 having a larger rotation radius placed in the rear. established in And rear left and right tilling members 47, 47
In this case, each tilling claw is rotated out of phase with the rotating shaft 4.
3 and 43, the rotational loci are partially overlapped and driven to rotate. 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 PTO shaft D on the tractor A side, and the rotation axis of the disc rotors 3, 3 is 3
2, the rotary shafts 43, 43 of the left and right center cultivating devices 4, 4 are rotationally driven in the direction of the arrow in FIG. As the tractor A moves forward, the disc-type rotary tiller B, which is towed by the tractor A,
The tilling members 46, 46 of the center tilling devices 4, 4 having a small rotation radius dig up a predetermined amount of soil (part A in Fig. 2) approximately at the center in the left-right direction of the tilling work surface and discharge it to the left and right sides. Following this, the rear tilling members 47, 47 with a large rotation radius dig up the remaining soil (see Fig. 2) and discharge it to the left and right sides. , 3 is pre-intermediately tilled in front between the inner ends. Then, the left and right pair of disc rotors 3, 3 at the rear plow and turn over the field that has been tilled in such a manner that the soil is tilled, and the soil is gathered to the center by the left and right disc rotors 3, 3. The area is backfilled in the middle tilled area and finished almost level without local elevation. Here, the soil discharged from side to side by intermediate tilling is reversed by each rear tilling disk 31, so that even if there is a variation in the amount of discharged soil handled by each tilling disk 31, a level tilling surface can be obtained. I can't. However, in the center tillage devices 4, 4,
Since the two front and rear tilling members 46, 47 share the intermediate tillage throughput, each tilling member 46, 47 also shares the amount of load fluctuation due to changes in field conditions or plowing depth. 46 and 47, the amount of load fluctuation is reduced compared to the conventional single series. Therefore, the amount of movement (throwing distance) of the soil discharged to the side by each tilling member 46, 47 is also stabilized, and as a result, each rear tilling disc 31
This also stabilizes the amount of soil to be treated, resulting in a level plowing surface. Note that the tilling members 46 before and after the center tilling device 4,
In terms of implementation, it is preferable that the ratio of the amount of intermediate tillage handled by each of the 47 to be divided is in the range of 3:7 to 4:6, and the ratio of the amount of soil movement to each side is also within the same range. , the rotation radius of each tilling member 46, 47 is set to match this. FIG. 5 is a skeleton diagram showing another embodiment of the present invention, and in this example, left and right center tilling devices 7, 7
is rotationally driven by a separate chain transmission mechanism from the mission device 1 without passing through the rotating shafts 32, 32 of the disk rotors 3, 3. That is, the transmission case 11 is provided with a transmission chain case 71 extending downward, and a pair of left and right rotation shafts 72, 72 rotatably supported at the lower end of the transmission chain case 71 extend diagonally forward. This is the transmission chain case 71.
It is configured to be transmitted to the transmission device 1 through an appropriate transmission system within the system, so that it can be rotated 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 attached to such rotating shafts 72 and 72, respectively, and the front tilling member 73 having a small rotation radius performs intermediate tilling by a predetermined amount. After that, the rear tilling member 74 processes the remaining part. This example also has front and rear tilling members 73, 74.
However, as shown in Fig. 6, the intermediate tillage processing amount is shared, so the amount of soil that is discharged to the side is stabilized as described above, so the left and right disc rotors 3,
3. The tilling work surface 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,
Alternatively, a tilling disc may be used, and an embodiment thereof is shown in a skeleton diagram in FIG. Of course, in this case as well, in the left and right center tilling devices 8, 8, the tilling disk 81 with a small radius is placed at the front, and the tilling disk 82 with a large radius is placed at the rear, and each of them is attached to the rotation shaft 83. 81 and 82 have curved concave surfaces facing outward in the left and right direction, and the front and rear tilling disks 81 and 8
The soil that has been divided and tilled in step 2 is discharged to the left and right sides as shown in FIG. A plowing working surface is obtained. In the embodiments described above, the tilling members provided in the center tilling device are arranged in front and back in two rows with different turning radii. may be arranged so that it becomes large.

【Effect of the invention】

As explained above, according to the present invention, the transmission from the transmission device to the disc rotor is transmitted to the outer end of the disc rotor through the upper part of the disc rotor, so that the power is transmitted between the inner ends of the left and right disc rotors. A center tilling device can be easily installed at the front position of the tiller. In addition, the tilling members fixed to each rotating shaft of the center tilling device are of a multi-unit type in which multiple sets with different rotation radii are arranged so that the one with the smaller rotation radius is located at the front, so the left and right disc rotors Since the central part of the tilling work surface, which is between the inner edges of the plowing surface, is divided in advance by the center tilling device, it goes without saying that the inconvenience that the central part becomes locally high due to the tilling process with the disc rotor is solved. In particular, since the amount of lateral movement of discharged soil by the center tilling device is stabilized, the amount of soil to be processed by each tilling disc of the disc rotor is also stabilized, and therefore the tilling work interface can be finished almost evenly. I can do it.

[Brief explanation of the drawing]

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 still other embodiments of the present invention. be. A... Tractor, B... Disc type rotary tilling device, C... Three-point link hitch mechanism, D...
PTO shaft, 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... Transmission frame pipe, 24...
Hinge support bracket, 25... Vertical axis pin, 26
...Chain case, 27...Support arm, 3...
...Disc rotor, 31...Plowing disc, 32
... Rotating shaft, 4 ... Center tilling device, 41 ... Gear case, 42 ... Bearing housing, 44 ... Universal joint, 45 ... Output shaft, 46,
47... Cultivating member, 5... Gauge wheel device,
6... Adjustment link device, 7... Center tilling device,
71...Transmission chain case, 72...Rotating shaft,
73, 74... Tilling member, 8... Center tilling device, 81, 82... Tilling disk, 83... Rotating shaft.

Claims (1)

[Scope of Claims] 1 A pair of left and right tillage discs comprising a hitch mechanism attached to a tractor and a mission device that receives rotational power from the tractor side, and a plurality of tilling discs fixed to a rotating shaft configured to transmit power to the mission device. The disc rotors are arranged symmetrically so that they form a predetermined gearing angle and the curved concave surfaces of each tilling disc face inward, and power is transmitted from the milling device to the disc rotor by passing above the disc rotor. A pair of left and right center tillers are provided at a forward position between the inner ends of the pair of left and right disc rotors, and a tiller member is fixed to each rotating shaft of the center tiller. A disc-type rotary tiller characterized in that a plurality of sets of rotary tillers having different rotation radii are arranged in a multi-unit type in which the rotary tiller having a smaller rotation radius is located at the front.