JPH0155841B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a disc-type rotary tiller that performs tilling work by driving a disc-equipped rotary shaft.

[Conventional technology]

Conventionally, this type of disc-type rotary tiller has been of the center drive type, and a chain transmission system has been arranged in the middle section.

[Problem to be solved by the invention]

For this reason, uncultivated land remains below the chain transmission system, and a complicated mechanism is required to dispose of the remaining tillage.
Furthermore, when the soil is turned over by driving the left and right rotary shafts with discs, the soil clods are placed on top of the uncultivated area, resulting in the formation of medium-high ridges.

The present invention was made based on the above-mentioned circumstances, and an object of the present invention is to provide a disc-type rotary tiller that can easily treat the central uncultivated land portion and form plowed fields evenly.

[Means to solve the problem]

To achieve this objective, the present invention
A transmission connected to the PTO shaft and receiving power transmission is provided on the main frame, and a rotary shaft with a disk is disposed on the left and right sides of the main frame, facing diagonally rearward, and the rotary shaft with a disk is powered from the transmission. It is configured to be driven via a transmission system, and is characterized in that a pair of left and right rotating center disks are disposed back to back on the inner end side of the rotary shaft with a disk in front thereof.

[Effect]

With the above configuration, when performing tillage work, first the left and right center disks open the middle soil section to the left and right, and then the rotary shaft disc backfills the open sections, thereby performing tillage work without leaving tillage.

〔Example〕

Hereinafter, one embodiment of the present invention will be specifically described with reference to the drawings.

In the figure, reference numeral 1 is attached to the rear of the tractor.
This transmission is equipped with an input shaft 1a connected to a PTO shaft via a universal joint, etc., and is mounted in the center of the main frame 2. The transmission 1 includes an output shaft 1b that protrudes left and right,
1b, which has universal joint 3
One end of the is pivotally connected.

The universal joint 3 has a rod portion that is extendable and retractable, and the other end portion is pivotally connected to the input shaft 4a of the chain transmission system 4. The chain case 4b of the chain transmission system 4 is fixed to the rear end of the swing frame 5, and the tip of the swing frame 5 is connected to the main frame 2 by the pivot shaft 6 in front of the transmission 1. It is pivotally supported. The chain case 4b extends downward and is provided with an output shaft 4c of the chain transmission system 4 at its lower part, to which a rotary shaft 8 having disks 7 mounted at a predetermined pitch is directly connected. The rotary shaft 8 has its inner end pivotally supported by a support arm 9 extending below the swing frame 5.

Further, a hydraulic cylinder 10 is suspended between the rear part of the main frame 2 and the chain transmission case 4b, so that the space between them can be expanded and contracted. That is, the hydraulic cylinder 10 is connected to a cylinder main body 10a whose one end is pivotally connected to a bracket 11 provided on the chain case 4b, and a piston that is slidably fitted into the cylinder main body 10a. The piston rod 10b is pivotally connected to the frame 2.

In addition, a pair of left and right disks 1 are located in front of the transmission case and are placed back to back.
2 and 12 are provided and supported by support shafts 13 and 13, and a chisel 14 is also installed behind them.

In such a configuration, power is transmitted from the PTO shaft to the transmission 1, from the transmission 1 to the chain transmission system 4 via the universal joint 3, and from the chain transmission system 4 to each rotary shaft 8. Since the inner ends of each rotary shaft are arranged as close together as possible, the uncultivated area in the center becomes small. Moreover, as the machine moves, the disk 12 supported by the support shafts 13, 13 rolls, tills the soil in the center and turns outward, and the rotation of the rotary shaft 8 with the disk removes the soil on the left and right sides. Since it is plowed and turned inward, there is no possibility of soil clods being placed on top of the uncultivated area in the center from the left and right sides, forming medium-high ridges, and the chisel 1
4 also works, so the uncultivated area in the center is completely treated and no residual tillage treatment is required later.

Therefore, it is advantageous compared to the conventional center drive system. Further, by applying hydraulic pressure to the hydraulic cylinder 10 depending on the soil quality and controlling the piston rod 10b to advance and retreat with respect to the cylinder body 10, the gearing angle α can be appropriately selected and adjusted. In this case, the transmission angle of the universal joint 3 is the difference between the angle α formed with the output shaft 1b of the transmission 1 and the gearing angle β, and the output can be transmitted to the chain transmission system at substantially constant speed.

Incidentally, in the above embodiment, the left and right rotary shafts 8 to which the disks 7, 7, . . . are attached can be adjusted in the gearing angle, but it is of course possible to have a configuration in which the gearing angle is fixed at a predetermined angle.

Further, it is preferable that the mutual contact level of the disks 12 can be adjusted, and it is also preferable that the angle γ formed by the outer edges in FIG. 1 and the distance l to the frontmost edge of the disk 7 can be adjusted.

〔Effect of the invention〕

As described in detail above, the present invention is configured such that the rotary shaft with a disk is driven from a transmission via a power transmission system, and a pair of automatic left and right By arranging the center disks back to back, it is possible to turn over the soil in the lower part of the mill in the center of the machine in an open-mouth shape at the same time as turning over the tillage using the disks on the left and right rotary shafts. Due to the structure, there is no uncultivated land area, and the tillage marks can be formed at a uniform height without being medium-high, allowing for excellent tillage work.

[Brief explanation of drawings]

FIG. 1 is a plan view showing one embodiment of the present invention, and FIG.
The figure is a rear view of the same, and FIG. 3 is a side view of the same. 1...Mission, 1a...Input shaft, 2...Main frame, 3...Universal joint, 4...
...Chain transmission system, 4a...Input shaft, 4b...Chain case, 4c...Output shaft, 5...Swing arm,
6... Pivot shaft, 7... Disk, 8... Rotary shaft, 9... Support arm, 10... Hydraulic cylinder,
10a...Cylinder, 10b...Piston rod, 11...Bracket, 12...Disc, 1
3...Spindle, 14...Chisel.

Claims (1)

[Scope of Claims] 1. A main frame is provided with a transmission connected to the PTO shaft of the tractor to receive power transmission, and a rotary shaft with a disk is disposed on the left and right sides of the main frame so as to face diagonally rearward, and the above-mentioned disk The rotary shaft with a disc is configured to be driven from the transmission via a power transmission system, and on the inner end side of the rotary shaft with a disc,
This disc-type rotary tiller is characterized by a pair of left and right rotating center discs arranged back-to-back in front of it.