JPH0438643Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a disc plow-type tilling device that is attached to a tractor and used.

<Prior Art> A disc plow type tilling device is used by being attached to the rear of a tractor. In this tillage device, disc plows each having a disc provided on a disc shaft are arranged on the left and right in a figure-eight shape when viewed from above, and between the left and right disc plows,
A pair of open-mouthed discs on the left and right are arranged close to each other in a figure-eight shape in plan view, and the left and right disc plows are forcibly driven by power from the tractor's PTO shaft. .

<Problems to be Solved by the Invention> However, since the open-mouth disc is rotatable around its axis and rotates on its own axis as a result of traction, various problems have arisen. In other words, because conventional open-mouth discs are self-rotating, they have a large traction resistance against tractors, and even though disc plows are driven, the wheels of small tractors may slip, making them unusable. . In addition, if there is waste straw in the field, if the open disc has a small diameter, it will not be able to be forced into the soil and will accumulate on the front side of the open disc. If the diameter of the open-mouth disc is made larger to improve the performance, problems such as interference with the tractor will occur, and the entire disc will have to be moved far back from the tractor, resulting in poor weight balance when lifted. A problem arises.

<Means for solving the problems> In view of these conventional problems, the present invention reduces the traction resistance to the tractor and improves the holding of waste straw etc. into the field using an open-mouth disc. The purpose of this is to reduce the size of the plow, and its characteristics are that the disc plow, which has a disc on the disc shaft, is arranged on the left and right in a figure-eight shape when viewed from above, and the A tillage device in which a pair of left and right open-mouth discs are provided in a figure-eight shape in plan view so as to be close to each other on the front side between disc plows, and the disc plow is forcibly driven by power from a tractor, A transmission case is provided vertically in the center of the device, and an input shaft is provided on the front surface of the upper part of the transmission case and extends forward.
A PTO shaft extends forward, and the input shaft and PTO
The shafts are interlocked with each other by a transmission means, a gear case is fixed to the transmission case in a forward-protruding manner, an input shaft and a pair of left and right rotation shafts are provided on the gear case, and the rotation shaft is provided with the opening. An open disk is provided, the input shaft and the PTO shaft are interlocked, and the input shaft and the rotary shaft are interlocked and connected within the gear case via a bevel gear.

<Effects of the invention> As described above, the present invention is provided with a drive means that uses the power from the tractor to forcibly drive the open disc, so the open disc can be forcibly driven. The traction resistance is reduced compared to the conventional type, making it possible to use it with small tractors, etc. Furthermore, by forcibly driving the open-mouth disc, it is possible to plow and turn the field while effectively suppressing waste straw and the like, thereby preventing accumulation on the front side of the open-mouth disc. In addition, since it is held down well, the open disc can be made smaller, which allows the entire tilling device to be brought closer to the tractor, and the weight balance when lifting can be improved.

Furthermore, according to the present invention, a structure is adopted in which the left and right rotating shafts and the input shaft are connected via bevel gears in the gear case protruding from the transmission case, so the gear case can be used as much as possible. The distance between the open-mouth discs attached to the left and right rotating shafts can be reduced. It is also possible to increase the angle of the open disc.

Therefore, it is possible to eliminate the remaining tillage area in the center.

<Example> Hereinafter, the present invention will be described in detail with reference to the illustrated example. In FIGS. 1 and 2, 1 is a tractor;
2 is the rear wheel, and 3 is the PTO shaft. Reference numeral 4 denotes a hydraulic system, which has a pair of left and right lift arms 5. Reference numeral 6 denotes a tilling device, which is attached to the rear of the tractor 1 to be pulled up and down via a three-point linkage mechanism 9 consisting of a top link 7 and a pair of left and right lower links 8. The tilling device 6 includes a machine frame 10, a pair of left and right disc plows 11, and an open disc 12.
The machine frame 10 includes a transmission case 13 in the center and support tubes 14 provided on both sides of the upper part of the transmission case 13.
An overhanging cylinder 1 is provided downward from each outer end of the support cylinder 14 so as to have a figure-eight shape in plan view.
5 and a side plate 16 extending downward from the outer end of each projecting cylinder 15, and each projecting cylinder 15 has a link 1
It is reinforced with 7. Each disc plow 11 consists of a disc shaft 18 rotatably supported across the lower part of a transmission case 13 and a side plate 16, and discs 19 fixed to this at equal intervals. are arranged in a figure eight shape when viewed from above. As shown in FIG. 3, the transmission case 13 includes an upper bevel gear mechanism 21 that receives power from an input shaft 20, and a lower bevel gear mechanism 2 that transmits power from a vertical shaft 22 to a horizontal drive shaft 23.
4 and a PTO forward from the vertical axis 22.
Intermediate bevel gear mechanism 2 that takes out power to shaft 25
6 in the middle. A disk shaft 18 is connected to both ends of the drive shaft 23 via a universal joint 27. The input shaft 20 is connected to the PTO shaft 3 of the tractor 1 via a universal joint shaft 28.

There are a pair of open-mouth discs 12 on the left and right, each of which is fixed to the outer end of the rotating shaft 29. The rotating shaft 29 is connected to a gear case 30 as shown in FIG.
The opening disk 12 at the outer end of the rotary shaft 29 is held in such a way that it has a wide front shape in plan view and is tilted so that the outer side is slightly lowered. It has a figure eight shape in plan view.
The gear case 30 is fixed by a support arm 31 extending forward and downward from the transmission case 13, and inside the gear case 30 there are bevel gears 32 fixed to each rotation shaft 29 and interlocking with each other, and a bevel gear 32 fixed to one rotation shaft 29. Fixed bevel gear 33
The bevel gear 33 engages with the input shaft 3.
4 and a bevel gear 35 fixed to the input shaft 34, and the input shaft 34 projects diagonally upward at the rear and is connected to the PTO shaft 25 via a universal joint 35. A driving means 36 for forcibly driving the open disc 12 by these PTO shaft 25, bevel gears 32, 33, 35, input shaft 34, etc.
is configured. Note that the gear case 30 is divided into a plurality of parts so that it can be assembled.

In the above configuration, when cultivating the field,
By the power of the PTO shaft 3 of the tractor 1, the disc 19 of the disc plow 11 is forcibly driven around the disc shaft 18 in the direction of the arrow a, and the open disc 12 is forcibly driven around the rotating shaft 29 in the direction of the arrow b. While doing so, the tilling device 6 is towed.

That is, when the open-mouth disc 12 is forcibly rotated, it actively cuts into the field, so that the gravel 3
7 can be quickly reversed and released to both sides as shown in FIG. 5, and the traction resistance to the tractor 1 can be greatly reduced. In addition, since the open disc 12 is forcibly rotated, it is possible to till the waste straw on the surface of the field while capturing it with the outer periphery and holding it down. etc. will not accumulate in front of the open disc 12,
It is possible to send it to the rear side together with the tilled gravel 37 and bury it under the gravel 37. In addition,
If the open disc 12 has a small diameter, the open disc 12 will not interfere with the tractor 1 even if the entire tillage device 6 is mounted close to the tractor 1. Furthermore, the fact that the entire tilling device 6 approaches the tractor 1 means that when the tilling device 6 is lifted up, the tractor 1
The front and rear weight balance can also be improved.

After opening with the opening disc 12, the field is tilled with each disc 19 of the left and right disc plows 11, and the gravel 38 is turned over from the left and right inward and released. Therefore, the tillage mark of this tillage device 6 is
As shown in the figure, on the opening mark of the opening disc 12,
The soil 38 is piled up by the disks 19 from the left and right, allowing complete tillage without leaving any residue.

The bevel gear mechanism within the gear case 13 may be constructed as shown in FIG. That is, in this case, bevel gears 39 and 40 are provided on the input shaft 34, and bevel gears 41 and 42 that mesh with the respective gears 39 and 40 are provided on the rotating shafts 29 and 29.

The transmission mechanism inside the transmission case 13 includes a spur gear,
Alternatively, a chain or the like can also be used.

The disc shaft 18 of the disc plow 11 can be driven from the outer end side, or can be adjusted in angle back and forth.

[Brief explanation of the drawing]

Figure 1 is a plan view showing one embodiment of the present invention;
The figure is a cross-sectional side view of the same, Figure 3 is a configuration diagram of the same transmission system,
FIG. 4 is a cross-sectional plan view of the same essential parts, FIGS. 5 and 6 are action explanatory views, and FIG. 7 is a configuration diagram showing another embodiment. DESCRIPTION OF SYMBOLS 1... Tractor, 6... Tilling device, 10... Machine frame, 11... Disc plow, 12... Mouth opening disc, 18... Disc shaft, 19... Disc,
36...Driving means.

Claims (1)

[Scope of Claim for Utility Model Registration] A disc plow consisting of a disc provided on a disc shaft is arranged on the left and right in a figure-eight shape when viewed from above, and a pair of open discs on the left and right are installed between the left and right disc plows. A tilling device is provided in a figure-eight shape in a plan view so as to approach each other at the front side, and the disc plow is forcibly driven by power from a tractor, wherein a transmission case is installed in the center of the device in a vertical direction. an input shaft extending forward from the front surface of the upper part of the transmission case, a PTO shaft extending forward from the front surface of the transmission case, and the input shaft and the PTO shaft being interlocked and connected to each other by a transmission means. A gear case is fixed to the transmission case so as to protrude forward, the gear case is provided with an input shaft and a pair of left and right rotation shafts, the rotation shaft is provided with the open disc, and the input shaft and the pair of rotation shafts are provided. A tilling device characterized in that a PTO shaft is interlocked and connected, and the input shaft and the rotary shaft are interlocked and connected within the gear case via a bevel gear.