JPH0449962B2 - - Google Patents

Description

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

The present invention relates to a disc-type rotary tiller that performs tilling work by driving left and right rotary shafts with discs.

[Conventional technology]

Conventionally, this type of disc-type rotary tiller is
For example, British Patent No. 857923, U.S. Pat.
As shown in Publication No. 54201, etc., the rotary shaft with a disk is of a center drive type.

[Problems to be Solved by the Invention] Therefore, uncultivated land remains in the center of the left and right rotary shafts with discs due to the arrangement of the mills, and a complicated mechanism is required to process the remaining tillage. Furthermore, when the soil is inverted by driving the left and right rotary shafts with discs, the inverted clod is placed on top of the uncultivated area, resulting in the formation of medium-high ridges. 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 provides a main frame with a transmission connected to the PTO shaft of the tractor to receive power transmission, a rotary shaft with a disc located on the left and right sides of the main frame, and a rotary shaft with a disc attached to the main frame. The rotary shaft is configured to be driven from the transmission via a power transmission system, and on the inner end side of the rotary shaft with the disc,
It is characterized by a pair of left and right center disks, which are driven from the transmission via a power transmission system, arranged back to back in front of the disk.

[Effect]

With the above configuration, the present invention can easily process the uncultivated area in the center using the pair of left and right center disks, and the plowed area can be formed evenly.

【Example】

Hereinafter, one embodiment of the present invention will be specifically described with reference to the drawings. In the figure, reference numeral 1 denotes a transmission equipped with an input shaft 1a connected to a PTO shaft provided at the rear of a tractor (not shown) via a universal joint, etc., and is mounted at the center of a main frame 2. The transmission 1 has output shafts 1b, 1b projecting left and right, to which one end of a universal joint 3 is pivotally attached. 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 inner end of the swing frame 5 is attached to the main frame 2 on the pivot shaft 6 in front of the transmission 1. It is supported as a pivot. 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 downward at the tip of 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 has a cylinder main body 10a whose one end is pivotally connected to a bracket 11 provided on the chain case 4b, a piston that is slidably inserted into the cylinder main body 10a, and is connected to the main frame. The inner end is pivotally connected to 2,
It is composed of a piston rod 10b. In addition, a pair of left and right disks 12, 12, located at the lower front of the transmission case 1, are mounted on support shafts 13, 13 protruding from the transmission case 1, with their backs facing each other, for processing residual tillage in the central area. It is installed and provided. In addition, the left and right disk 1
A chisel 32 is installed at the rear of the central part of 2 and 12. Since the present invention is configured as described above, the power to the rotary tiller is transmitted from the PTO shaft to the transmission 1, and from the transmission 1 to the chain transmission system 4 via the universal joint 3. Since the transmission is transmitted from the transmission system 4 to each rotary shaft 8 from its outer side, the inner ends of each rotary shaft 8 are arranged as close together as possible, so that the uncultivated area in the center has a narrow width. Become something. The disks 12, 12 attached to the support shafts 13, 13 come into contact with the soil as the aircraft travels,
While rolling due to the ground resistance, the soil in the uncultivated area in the center is tilled strongly and turned outward toward the front, and the remaining tillage is well done to form a split-shaped opening in the center. Since the soil clods that are plowed and turned over toward the opening are backfilled by driving the rotary shaft 8 with the left and right disks 7, there is no possibility that the soil clods will rest on uncultivated land and form medium-high ridges. The finish is improved. Moreover, the traction resistance is reduced and the chisel 32 provides a more complete treatment of the center. 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 β of the rotary shaft 8 with the disc 7 can be appropriately selected and adjusted. In this case, the transmission angle of the universal joint 3 is the angle α formed with the output shaft 1b of the mission 1.
This is the difference between the gearing angle β and the gearing angle β, and the output can be transmitted to the chain transmission system at substantially constant velocity. In the above embodiment, the disks 12, 12 for processing residual tillage in the central area were explained as automatic rotary disks, but they can also be used as drive disks that are forcibly rotated by receiving power from the transmission 1 to the support shafts 13, 13. Of course it's a good thing. Further, it is preferable that the contact level between the disks 12, 12 can be adjusted, and 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. good. Further, the rotary shaft 8 to which the disks 7, 7... are attached may be fixed at a predetermined angle, and the universal joint 3 that transmits power from the transmission 1 to the chain transmission system 4 may be fixed at a predetermined angle. It may be changed to a power transmission means.

【Effect of the invention】

As explained above, the disc-type rotary tiller of the present invention transmits power from the transmission via the power transmission system to the left and right rotary shafts with discs to drive them, and the inner end of the rotary shaft with discs. In this machine, a pair of left and right center disks driven by the transmission system from the transmission system are arranged back to back in front of the machine, so that the soil in the center of the machine is treated with open left tillage by the center disk, and the left and right disks The attached rotary shaft disc tills the soil on both the left and right sides inward, turns it over, and at the same time, tills the soil strongly and efficiently towards the front on the left and right sides.
Since it is inverted, it is possible to treat the remaining tillage in the center more effectively than with the above-mentioned center disc that uses a rotating type, and therefore, the center disk can be processed more beautifully in the center than with the rotating type. Moreover, since the traction resistance is reduced, the tillage work can be carried out satisfactorily even in fields with soft soil where it would be impossible to do the work with a rotating type.

[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... Disc, 8... Rotary shaft, 9... Support arm, 10... Hydraulic cylinder,
10a...Cylinder, 10b...Piston rod, 11...Bracket, 12...Disc, 1
3...Spindle.

Claims (1)

[Claims] 1. A main frame is provided with a transmission connected to a PTO shaft of a tractor to receive power transmission, a rotary shaft with a disk is provided on the left and right sides of the main frame, and the rotary shaft with a disk is connected to the transmission. The rotary shaft is configured to be driven from the rotary shaft via a power transmission system, and on the inner end side of the rotary shaft with the disc,
This disc-type rotary tiller is characterized by having a pair of left and right center discs, which are driven by a transmission system via a power transmission system, arranged back-to-back in front of the power tiller.