JPH0310801Y2 - - Google Patents

Description

[Detailed explanation of the idea] [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.

[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, there is an inconvenience that residual plowing occurs in the center of the plowing surface, and the soil is gathered there by the disc rotor, resulting in 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 created a method for performing split tillage in which 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.

[Problem that the invention attempts to solve]

By the way, in those equipped with a center tillage device, the disc rotor placed at the rear inverts the soil and brings it to the center, backfilling the middle part, so the soil dug up by the center tillage device is If the tilling disk in the rotor is not placed in a position where it can be accurately reversed, the soil sloughing action by the disk rotor will be inaccurate, creating a problem in obtaining a level tilling surface. This problem arises when the center tilling device is a center disk device that mainly consists of a tilling disk, and the tilling disk only reverses and discharges the half-tiled soil in the left and right direction. This is particularly likely to occur due to the inability to throw the ball in one direction.

[Means to solve the problem]

Therefore, the purpose of this invention is to improve the finish of the tilling work surface by ensuring that the soil dug up by the center disk device is accurately turned over by the tilling disks of the disk rotors. A space is formed between the inner ends of the left and right disk rotors by transmission to the transmission device on the outer end side, and the inner end of the rotating shaft is projected into this space. The gist of this invention is to configure a rotary feeding means that promotes the discharge of soil dug up by a center disk device.

[Effect]

With such a means, the soil dug up by the center disk device and reaching between the inner ends of the left and right disk rotors is urged to be discharged to the left and right sides by the rotary feeding means, and is moved to the curved concave side of the tilling disk of the disk rotor. You will be guided smoothly.

【Example】

An embodiment of the present invention will be described below with reference to the drawings. In Figures 2 and 3, 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 provided to project 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 as to receive rotational driving force from the tractor A. 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 protruded from both left and right sides of the mission case 11. Further, hinge support brackets 16, 16 that cover the top and bottom of these are provided to protrude left and right. 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 pipes 23, 23 have hinge support brackets 24, 24 fixedly attached to their respective inner ends with vertical shaft pins 25, 2.
5 through the hinge support brackets 16, 16.
The vertical shaft pins 25, 25 are connected and supported by the transmission case 11 and protrude substantially horizontally from the transmission case 11 to the left and right rear sides.
By being arranged in alignment with the center of the transmission shaft 22
It is designed to be able to swing back and forth in a substantially horizontal plane. The transmission shaft 22,
By fixing the upper ends of the chain cases 26, 26 containing a chain transmission mechanism interlocked with the chain transmission mechanism 22, a substantially 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 33 passes through the center of a plurality of (two in this embodiment) tilling discs 31, 32 that are shaped like shallow bowl-shaped discs, and the tilling discs 31, 32 are inserted into the center of the tilling discs 31, 32 in a predetermined position. These disc rotors 3, 3 are fixed at pitch intervals and with their curved concave surfaces aligned in the same direction.
The concave curved surface thereof is placed toward the center of the device below the mission case 11. The left and right disc rotors 3, 3 arranged in this manner have their rotating shafts 33, 33 supported at their outer ends on the lower ends of the chain cases 26, 26, respectively, and are connected to the transmission shafts via an internal chain transmission mechanism. 2
2 and 22, respectively, and the rotating shaft 3
3, 33, that is, the part between the two tilling disks 31, 32, the inner tilling disk 31
The portions close to the curved outer surfaces of are rotatably supported by bearing housings 28, 28 fixed to the lower ends of arms 27, 27 fixed to the transmission frame pipes 23, 23 and extending downward therefrom, respectively. It is forcibly rotated in the forward direction by the mission device 1 (see FIG. 1). Note that the reference numeral 5 in the figure indicates the chain case 26, 2.
This is a pair of left and right gauge wheel devices that are attached to the rotors 6 and supported on the field at a predetermined height, and the plowing depth of the disc rotors 3 is adjusted by adjusting the height. Reference numeral 6 designates an adjustment link device that simultaneously adjusts the forward and backward swinging positions of the left and right transmission frame pipes 23, 23 in a symmetrical manner to set the gearing angle of the disc rotors 3, 3 to a predetermined value. In addition, a pair of left and right center disk devices 4, 4 are provided at the front position between the inner ends of the disk rotors 3, 3.
will be provided. This center disk device 4, 4
As shown in FIGS. 1 and 4, the transmission is configured via another transmission chain case 41 extending downward from the transmission case 11, and the lower end of this transmission chain case 41 has a , a pair of left and right rotating shafts 42, 4 rotatably supported thereon.
2 protrude diagonally forward, and are configured to be transmitted to the mission device 1 via an appropriate transmission system within a transmission chain case 41, so that they are rotated in the direction of the arrow in the figure. Cultivation disks 43, 43 are attached to these rotary shafts 42, 42, respectively, and these are arranged symmetrically in a figure-eight shape, with their curved concave surfaces facing outward in the left-right direction, and with their front portions close to each other in plan view. It is designed to be rotated in the forward direction. Here, as mentioned above, the rotating shaft 33 of the disc rotor 3 is supported at two points, the outer end and the middle part.
In addition, since the transmission is configured on the outer end side, a predetermined space is formed between the inner ends of the left and right disc rotors 3, 3. Therefore, according to the present invention, the rotation shafts 33, 33 of the left and right disc rotors 3, 3 protrude from the curved concave surface of the inner tilling disc 31 within this space, and the outer circumferential surfaces of the protrusions 34, 34 have a hexagonal shape, for example. It is made into a polygonal shape such as , and constitutes a means for rotating the soil. In the above configuration, the left and right disk rotors 3, 3 are driven to rotate 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 left and right center disk devices 4, 4
The rotating shafts 42, 42 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,
tilling disk 43 of the center disk device 4, 4;
43, the soil at approximately the center in the left-right direction of the tilling work surface is dug up and discharged to the left and right sides, and as a result, intermediate tillage is applied in advance between the inner ends of the left and right disc rotors 3, 3. be done. Then, a pair of left and right disc rotors 3, 3 at the rear plow the field, which has been tilled in the middle, and turn the field over to till the soil.
The soil collected in the center in step 3 is backfilled into the intermediate plowing area and finished without causing local elevation. Here, when looking at the flow direction of the discharged soil by the tilling disks 43, 43 of the center disk devices 4, 4, as shown in FIG. However, since the amount of movement of the discharged soil from side to side is relatively small, a part of the discharged soil is located at the front in the space between the inner ends of the left and right disc rotors 3, 3. However, according to this embodiment, the inner ends of the rotating shafts 33, 33 of the disk rotors 3, 3 are made to protrude into this space, and the outer circumferential surfaces of these protrusions 34, 34 are made polygonal to form the rotary feeding means. Therefore, the soil discharged to the front position in this space will eventually come into contact with the outer circumferential surfaces of the protrusions 34, 34, and will be accelerated to be discharged in the left-right direction by the feeding action caused by the rotation in the forward direction. . Therefore, as shown in FIG. 5, the soil dug up by the center disk device 4 is discharged toward the curved concave side of the inner tilling disk 31 of the disk rotor 3, and the soil is removed from the tilling disk 31.
It becomes possible to receive the reversal effect accurately. For this reason, the earth-moving action of the disc rotors 3, 3 is performed well, together with the fact that a space is formed between them and the soil is well drained, and the center disc devices 4, 4 are able to move the soil to the middle part. The backfilling action of the soil is reliably performed and a level plowing surface can be obtained. Note that the rotation shafts 33, 3 of the disc rotors 3, 3
The rotary feeding means configured on the inner end protrusion 34 of No. 3 is as follows:
The arrangement is not limited to this embodiment, but may be as shown in FIG. That is, an impeller 35 is provided, in which blades 37 made of curved plates having a predetermined elasticity are equally distributed in the circumferential direction, and the boss portion 36 of the impeller 35 is connected to the inner end protrusion 34 of the rotating shaft 33 with a pin or the like. They may be removably fitted by appropriate means. In this case, the impeller 35 is installed so that the curved outer surface of each blade 37 faces forward in the rotational direction, so that as the impeller 35 rotates, each blade 37 elastically suppresses soil rising. while providing accurate feeding action to the soil.

[Effect of the idea]

As explained above, according to the present invention, the soil excavated by the center disk device and discharged between the inner ends of the left and right disk rotors is also urged to be discharged to the left and right sides by the rotary feeding means, and the soil is discharged between the inner ends of the left and right disk rotors. Since the tilling disc is smoothly guided to the curved concave side, it is accurately reversed by the left and right disc rotors, and its soil sloughing action is good.
The action of backfilling the soil into the middle part is ensured, and a level finish on the plowing surface can be obtained.

[Brief explanation of the drawing]

Figures 1 to 4 show an embodiment of the present invention, with Figure 1 being a schematic rear view of the main parts thereof, Figure 2 being a rear perspective view, Figure 3 being a plan view, and Figure 4 being a skeleton view. FIG. 5 is an explanatory diagram of the operation, and FIG. 6 is a perspective view showing the main parts of another embodiment of the present invention. 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...Arm, 28...
Bearing housing, 3... Disc rotor, 31,
32... Tilling disk, 33... Rotating shaft, 34...
...Protruding part, 35... Impeller, 36... Boss part, 3
7...Blade, 4...Center disk device, 41...
...Transmission chain case, 42...Rotating shaft, 43...
...Tillage disk, 5...Gauge wheel device, 6
...adjustment link device.

Claims (1)

[Scope of utility model registration request] It is equipped with a hitch mechanism attached to the tractor and a transmission device that receives rotational power from the tractor side, and a pair of disc rotors in which a plurality of tilling discs are fixed to a rotating shaft with their curved concave surfaces facing the same direction. A disk-type rotary tiller is provided with the curved concave surfaces facing inward and arranged symmetrically so as to form a predetermined gearing angle, and a center disk device is provided at a forward position between the inner ends of the pair of left and right disk rotors, and The rotating shafts of the disc rotors are configured to transmit power to the upper transmission device at their outer ends, and a space is formed between the inner ends of the left and right disc rotors, and the inner ends of the rotating shafts are respectively projected into this space. A disc-type rotary tiller, characterized in that the outer periphery of the protrusion is provided with a rotary feeding means for promoting the discharge of soil dug up by the center disc device.