JPH0313121Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field]

This invention rotates a disc rotor, which is connected to the rear of the tractor via a three-point support link mechanism so that it can be raised and lowered, and is arranged so that the gearing angle can be adjusted, by the power transmitted from the PTO shaft of the tractor. The present invention relates to a driven disc-type rotary tiller.

[Prior art]

Conventionally, this type of tillage device has been described, for example, in British Patent No. 857923 and Japanese Utility Model Application Publication No. 57-54201. According to these, the disk of the disk rotor has a concave curve. Since they are disc-shaped with their surfaces facing inward, during tillage, the outermost discs of these rotors produce a large arc-shaped residual tillage as shown in Fig. There is a problem that the finish is not clear.

[Problem that the invention attempts to solve]

The present invention has been developed based on the above-mentioned circumstances, and is designed to ensure that the above-mentioned residual tillage generated by the outermost disk of the rotor can always be reliably disposed of in conjunction with the adjustment of the gearing angle of the disk rotor. The object of the present invention is to provide a disc-type rotary tilling device.

[Means to solve the problem]

In order to solve the above problems, the present invention provides a disc type rotary tiller equipped with a disc rotor that is connected to the PTO shaft of a tractor to receive power transmission and can adjust the gearing angle. A parallel ring mechanism is provided that interlocks with angle adjustment, and a support arm attached to the mechanism is provided with a residual tillage processing device located behind the outermost disk of the disc rotor to process residual tillage caused by the disk. It is characterized by:

【Example】

An embodiment of the present invention will be described below with reference to the drawings. In the figure, reference numeral 1 denotes the main frame of the main body of the tilling device, which has two rows of vertical bars 11, 12 and horizontal bars 13, 1 long in the front and back direction at the center of the width direction of the device.
The framework is based on 4. A transmission (mission case 2) is fixed to this main frame 1 at the middle part in the front and back direction, spanning between the left and right vertical bars 11 and 12.
An input shaft 21 is protruded from the front surface of the input shaft 21, which is transmission-coupled to a PTO shaft 23 installed at the rear of the tractor via a drive shaft 22, as seen in well-known tractor-type agricultural machines, so that the input shaft 21 is connected to the PTO shaft 23 installed at the rear of the tractor. It is designed to receive power transmission. Furthermore, the main frame 1 has a strut 15 erected at its front end, and includes an unillustrated top link connected to the top of the strut 15, and two left and right lower links 16 connected to both sides of the lower part. The main frame 1 is connected to the rear part of the tractor so as to be vertically movable via a three-point support link mechanism. The disk rotor 3, which is arranged on both the left and right sides of the main frame 1, has a plurality of disks 32 (three in the illustrated embodiment) mounted at a predetermined pitch on each horizontally supported rotor shaft 31. The disks 32 in the left and right rotors are installed symmetrically so that their curved concave surfaces face inward, and the left and right disk rotors 3 are each The rotor shaft 3 is installed at the lower part between the members vertically installed on the left and right sides of the rotor frame 33 so that the rotor frame 33 has a gate shape and is independently framed by the rotor frame 33.
1 is pivoted at both ends. The left and right rotor frames 33 have vertical pins 34 at their respective inner ends.
The rotor frames 33 are pivotally connected to the vertical bars 11 and 12 of the main frame 1 by means of vertical pins 34, and each rotor frame 33 is supported so as to be able to swing back and forth in a horizontal plane using the vertical pins 34 as fulcrums. The gearing angle of the disc rotors 3, 3 can be adjusted. In order to adjust the gearing angle, the left and right rotor frames 33 are each connected to a sliding body 4 supported at the rear of the main frame 1 so as to be slidable back and forth through interlocking rods 35, respectively. The base end of a hydraulic cylinder 5 housing a piston rod 51 whose base end is pivotally connected to the horizontal crosspiece 14 between the left and right vertical crosspieces 11 and 12 of the main frame 1 is connected to the sliding body 4, and the hydraulic cylinder 5 expands and contracts. The sliding body 4 is made to slide back and forth along the vertical bars 11, 12 of the main frame 1 by the operation, and a hydraulic motor 6 that operates this hydraulic cylinder 5 moves along the left and right vertical bars 11, 1 of the main frame 1.
It is mounted in a blind space formed between the transmission case 2 and below the transmission case 2, and is driven from the input shaft 21 of the transmission case 2 via a belt transmission system 23. The transmission case 2 has output shafts (not shown) that protrude in the left-right direction, and a power transmission shaft 25 connected to each output shaft via a universal joint 24 extends sideways along the rotor frame 33. The other end is transmission connected to a side transmission system in a transmission case 36 attached to the outer end side of the rotor frame 33, and rotational power is transmitted to the rotor shaft 31 of each disc rotor 3 through this side transmission system. is communicated. Note that the power transmission shaft 25 has a structure in which the shaft portion can be expanded and contracted.
Further, the disk rotor 3 is driven to rotate at a high speed (approximately 3.5 times or more faster) than the working speed of the tractor (rotation speed of the disk). In front of the rotor frame 33, there are vertical bars 11 and 12.
A rod 72 whose inner end is pivotally connected by a vertical pin 71 is provided on a mounting seat fixed to the rotor frame 33, and the rod 72 is pivotally connected to the rotor frame 33 and the outer part of the rod 72 by vertical pins 73, A support arm 74 is provided which extends bent towards the rotor frame 33, rod 72, support arm 74, etc. to form a parallel linkage A in the area of the vertical pin. A support tube 75 provided at the rear end of the support arm 74
, a pillar 77 is provided with a single tiller 7 located at the rear of the outermost disk 32 of the left and right disk rotors 3, 3 at the bottom end and a plurality of adjustment holes 76 at the top, and is slidable in the vertical direction. By inserting the pin 78 into one of the adjustment holes 76 through the hole provided in the support tube 75,
Appropriate plowing depth can now be obtained. Then, the single-layer soil pot 7 adjusted in this way
The outermost disk 32 of the disk rotor 3
The arc-shaped remaining cultivated soil produced by this process is plowed and turned inward as shown in FIG. 4, and is reliably disposed of, and at the same time, stable straightness of the tillage device can be expected. In addition, in front of the inner end sides of the left and right disc rotors 3, 3, a central tillage processing mechanism 8 is arranged to cultivate a pair of left and right discs 81, 81 with their curved concave surfaces facing outward and their peripheral edges touching at the front. In this way, it is pivotally supported in a V-shape when viewed from above. With this configuration, when moving the tractor forward to perform plowing work, the tractor's
The left and right disc rotors 3, 3 are rotated by the power transmitted from the PTO shaft 23 via the drive shaft 22 at a higher speed than the working speed of the tractor (disc rotation speed), and this rotation is driven. The soil is turned inward and plowed by the disks 32 of each rotor 3, 3, but before this turning and plowing by the left and right disk rotors 3, 3, the central tilling processing mechanism 8 is activated. The pair of left and right disks 81, 81 that constitute the disk rotors 3, 3 cut into the uncultivated land in front of the middle part of both the disk rotors 3, 3, and till the soil in the middle part in the center left and right. Soil inversion and plowing according to step 3 will be performed accurately. At that time, the left and right disk rotors 3, 3
The outermost disk 32 produces an arcuate residual plow as described above, but this is plowed inward and turned over by the single tiller 7 located behind the disk, as shown in FIG. Moreover, even if the gearing angle of the left and right disc rotors 3, 3 is adjusted, the tiller 7 can be processed reliably by the parallel ring mechanism A consisting of the rotary frame 33, rods 72, etc. Since the plowing is always facing in the direction of travel, the plowing is done perfectly, resulting in a clean finish with no residual plowing, especially at the edges of the furrows. Further, the tilling depth of the single tiller 7 is adjusted by inserting the pin 78 into an appropriate one of the adjusting holes 76, which also serves to adjust the tilling depth by the disc rotor 3. It is also expected that the straightness of the tillage device will be improved. Although the above description has been made regarding a so-called two-way disc rotor in which disc rotors are provided on the left and right sides of the main frame, the present invention is naturally applicable to a one-way disc rotor.

[Effect of the idea]

In view of the above, in the present invention, a parallel link mechanism is provided that is linked to the adjustment of the gearing angle of the disc rotor, and the support arm attached to the mechanism is
Since the residual tillage treatment device is located behind the outermost disk of the disk rotor and processes the residual tillage from the disk, regardless of the adjustment of the gearing angle of the disk rotor, the residual tillage treatment device The resulting residual tillage is always disposed of reliably,
As a result, it is expected that a beautiful finish, especially at the edge of the furrow, will be achieved, and various useful effects such as improved straightness of the tillage device can be expected.

[Brief explanation of drawings]

The attached drawings show one embodiment of the present invention.
FIG. 2 is a plan view, FIG. 2 is a side view, and FIGS. 3 and 4 are explanatory views of the finished state of tillage by a conventional disc-type rotary tiller and the tiller of the present invention, respectively. 1... Main frame, 11, 12... Vertical frame, 1
3, 14...Horizontal beam, 15...Strut, 16...
...Lower link, 2...Mission case, 21
...Input shaft, 22...Drive shaft, 23...
... Belt transmission system (hydraulic drive), 24 ... Universal joint, 25 ... Power transmission shaft, 3 ... Disc rotor, 3 ... Rotor shaft, 32 ... Disc, 33 ... Rotor frame, 34 ... Vertical Pin, 35... Interlocking rod, 36... Transmission case, 4...
...Sliding body, 5...Hydraulic cylinder, 51...Piston rod, 6...Hydraulic motor, 7...Single tiller,
71... Vertical pin, 72... Rod, 73... Vertical pin, 74... Support arm, 75... Support cylinder, 76
...adjustment hole, 77...post, 78...pin, 8...
...Central tillage processing mechanism, 81...Disk, A...
Parallel link mechanism.

Claims (1)

[Scope of utility model registration request] In a disc-type rotary tiller equipped with a disc rotor that is connected to a PTO shaft of a tractor to receive power transmission and can adjust the gearing angle, a parallel ring mechanism is provided that interlocks with the gearing angle adjustment of the disc rotor, A disc-type rotary tillage device characterized in that a support arm attached to the mechanism is provided with a residual tillage processing device located behind the outermost disc of the disc rotor to dispose of residual tillage left by the disc.