JPH0416961Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Purpose of the Invention] (Field of Industrial Application) The present invention relates to a rotary tiller that continuously plows a surface using a plurality of desks.

(Prior art) Conventionally, desk cultivating bodies in which a plurality of desks are arranged side by side are arranged on the left and right, and when cultivating with these left and right desk cultivating bodies, there is a residual tillage between the inner ends of the left and right desk cultivating bodies. There is a problem in that the remaining plowed areas are troublesome to dispose of.

(Problem to be solved by the invention) Therefore, in order to prevent the above-mentioned residual tillage from occurring, a rotating desk for processing the residue is provided, and this rotating desk removes the soil between the inner ends of the left and right desk tillage bodies. A structure in which plowing is reversed outward in the left-right direction has been proposed. However, according to this structure, the desk for residue processing is
Since the structure is such that it cuts and plows while rotating due to earth pressure when being towed, there are problems such as high traction resistance and poor soil cutting and turning performance as well as poor performance in cutting foreign matter such as straw. .

Therefore, for example, as described in the specification of JP-A-60-2101, it has been considered to drive a pair of left and right desks, but nothing is disclosed about its specific structure. Since this pair of desks is driven in a substantially eight-shaped inclined state when viewed from above, the structure for driving this pair of desks poses a problem.

The present invention has been developed in view of the above points, and when the residual tillage between the inner ends of the left and right desk tillers is subjected to tillage reversal processing by a pair of rotatably driven drive disks, the pair of drive disks is rotated. The purpose of this system is to reliably rotate the drive desk in a substantially eight-figure shape in plan view, greatly improving soil cutting performance, soil reversal performance, and foreign material cutting performance, and improving work efficiency. .

[Structure of the idea]

(Means for Solving the Problems) The rotary tillage device of the present invention has a machine frame, and rotatably disposed on the left and right sides of the machine frame, and the soil is arranged at intervals to continuously till and turn the soil. a case body with a built-in transmission for transmitting power to the left and right desk cultivating bodies provided on the machine frame; and inner ends of the left and right desk cultivating bodies. an extension case body located between and protruding forward of the case body; and a left and right universal joint rotatably provided at the tip of the extension case body, the extension case body being interlocked and connected to the transmission. a rotary drive body, a cylindrical support frame that protrudes from the left and right ends of the extension case body and rotatably supports the left and right universal joints; The present invention is equipped with a pair of driving desks arranged opposite each other in a substantially eight-shape shape when viewed from above, for tilling and inverting the soil located between the inner ends of the desk tilling body in advance in a direction outward in the left and right direction.

(Function) In the rotary tilling device of the present invention, for example, when a machine frame is connected to a tractor and the transmission is driven by power from the tractor, the left and right desks are tilled by the power output from the transmission. Each disk of the body is rotationally driven, and a rotary drive body connected in conjunction with the transmission is rotated, and a pair of drive disks connected to left and right universal joints of this rotary drive body are rotationally driven. Then, when the machine is towed by a tractor, the cultivated soil between the inner ends of the left and right desk tillers is cut and tilled by the pair of driving desks, and turned outward in the left-right direction. Further, the tilled soil on the left and right sides of the pair of driving desks is cut and tilled over a predetermined width by each desk of the left and right desk tillers, and is turned over in the left-right direction. Therefore, the pair of driving desks at the front and the pair of desk cultivating bodies at the left and right rear portions perform surface cultivation without leaving any remaining tillage, and the pair of driving desks cut off foreign matter.

(Embodiment) Hereinafter, the structure of an embodiment of the present invention will be described based on the accompanying drawings.

In the figure, reference numeral 1 denotes a machine frame, and the front part of this machine frame 1 is provided with connecting portions 2 that connect to each of the three-point links of the tractor.

Driving desk cultivating bodies 3 as left and right desk cultivating bodies are disposed at the left and right lower portions of the machine frame 1. The left and right driving desk cultivating bodies 3 are connected to a main frame 5 by means of a support shaft 4 at the lower left and right portions at the rear of the machine frame 1, respectively.
The inner ends of the left and right main frames 5 are supported so as to be rotatable in the horizontal direction, and a drive shaft 8 is rotatably supported at the lower part of the left and right main frames 5 via a transmission case 6 at the outer end and a bearing 7 at the inner end, respectively. A plurality of circular bowl-shaped desks 9 are attached to the left and right drive shafts 8 in the axial direction at predetermined intervals, that is, at intervals for continuously tilling and reversing the cultivated soil. Further, the outer ends of the angle adjusting arms 11 are rotatably mounted on the rear portions of the left and right main frames 5 through support shafts 10, and the inner ends of the left and right angle adjusting arms 11 are
A selected one of the plurality of mounting holes 12 drilled at appropriate intervals is connected by a bolt extending through the bolt and a nut 13 screwed into the bolt,
Further, the bolt nut 13 is detachably attached to a support frame 14 projecting from the intermediate rear part of the machine frame 1. Then, by selecting the mounting holes 12 of the left and right angle adjustment arms 11 and attaching and fixing them with bolts and nuts 13, the left and right angle adjustment arms 11 can be adjusted to expand and contract, and the main frame 5 can be moved around the support shaft 4 relative to the machine frame 1. It rotates as a fulcrum, and the inclination angle of the left and right drive desk cultivating bodies 3 is adjusted.

In addition, a transmission 15 is installed in the middle upper part of the machine frame 1.
is provided. This transmission 15 has a case body 16 attached to the machine frame 1, and a power input shaft 17 connected to a power take-off section of a tractor is rotatably attached to the front part of the case body 16 via a bearing 18. The case body 16 is provided in a protruding manner.
A power output shaft 19 is rotatably mounted horizontally through a bearing (not shown), and this power output shaft 19
is interlocked with the power input shaft 17 via a bevel gear mechanism 20, and this power output shaft 1
A sprocket 39 is fixed to 9. Both ends of this power output shaft 19 are connected to the case body 1.
A transmission shaft 23 is connected between the connecting portions 21 at both ends of the transmission case 6 and an input shaft 22 projected from the upper end of the left and right transmission cases 6 via universal joints at both ends. There is. The power from the tractor is then transferred to the power input shaft 17 of the transmission 15, the bevel gear mechanism 20, and the power output shaft 1.
9, the power is transmitted to the drive shaft 8 via the transmission shaft 23, the input shaft 22 of the transmission case 6, and a sprocket and chain inside the transmission case 6 (not shown), so that the left and right desks 9 are rotationally driven.

Next, a pair of drive desks 24 for pre-processing are disposed at the lower intermediate portion of the machine frame 1 at the front portion between the inner ends of the left and right drive desk cultivating bodies 3. The pair of driving desks 24 are rotatably attached to the tip of an extension case body 25 that integrally projects forward and downward from the front part of the case body 16 of the mission 15 in a substantially eight-shape in plan view. It is provided. That is, a sprocket 27 as a rotary drive body is rotatably attached to the tip of the extension case body 25 via a bearing 26.
A pair of yokes 28 are integrally protruded from the left and right sides of the sprocket 27, respectively, and the inner ends of a universal joint 29 are rotatably connected to the left and right upper and lower yokes 28. A boss 3 is provided at the center of the pair of drive desks 24 through a key 31 on each of the support shafts 30 at the outer ends of the drive desks 29.
The two cylindrical bodies 33 are fitted and locked. In addition, right and left cylindrical support frames 34 at the tip of the extension case body 25 are integrally provided in a forwardly inclined state, and the left and right adjustable joints 29 are supported within these left and right support frames 34, respectively. A cylindrical body 33 fitted and supported by the shaft portion 30 is rotatably supported via a bearing 35. Further, bolts 38 are inserted and screwed into the support shafts 30 of the left and right universal joints 29 from the locking plate 36 of the boss 32 via washers 37, and these bolts 38 are used to connect the left and right drive desks. 24 are removably connected to the left and right parts of the sprocket 27 in the extension case body 25 via universal joints 29, respectively, and rotate about the left and right support frames 34 in a substantially eight-shape shape when viewed from above. freely connected. Further, an endless chain 40 provided in the extension case body 25 is rotatably suspended between the sprocket 39 of the power output shaft 19 of the case body 16 and the sprocket 27, and the extension Case body 25
A tension 14 provided at is in abutment. In the figure, reference numeral 42 indicates a scraper provided for the pair of drive desks 24, and reference numeral 43 indicates a soil guide body that guides the tilled and reversed soil from the pair of drive desks 24 to the outer side in the left-right direction.

Next, the operation of the structure of the above embodiment will be explained.

The three-point link of the tractor is connected to the connection part 2 of the machine frame 1, and the power input shaft 1 of the transmission 15 is connected to the three-point link of the tractor.
Connect the power take-off part of the tractor to 7.

When the machine is towed by the tractor and the transmission 15 is driven by the power output from the tractor, the pair of drive desks 2
4 is rotationally driven, and the respective desks 9 in the left and right driving desk cultivating bodies 3 are rotationally driven, and the pair of driving desks 24 and the left and right driving desk cultivating bodies 3 cultivate soil over a predetermined width. It is cultivated continuously.

That is, the pair of driving desks 24 are located in front between the inner ends of the left and right driving desk cultivating bodies 3, and are connected to each other via the sprocket 39 of the mission 15, the endless chain 40, the sprocket 27, and the left and right adjustable joints 29. It is rotatably driven around the left and right supporting frames 34, and the cultivated soil located between the inner ends of the left and right drive desk cultivating bodies 3 is cut and tilled by the pair of drive disks 24, and is turned left and right. In addition, the soil is turned over by the pair of driving desks 24.
As the soil moves forward, the soil is guided and dispersed by the left and right soil guiding bodies 43 to the front sides of the respective desks 9 of the left and right drive desk cultivating bodies 3 . Therefore, as a whole, surface plowing is carried out in an orderly manner without particularly high raised middle and high areas, and there is no residual area between the inner ends of the left and right driving desk cultivating bodies 3. Further, foreign matter is reliably cut by the left and right desks 9 and the pair of driving desks 24 which are rotatably driven.

Next, in practice, the pair of driving desks 24 are not limited to the case where they are formed in a circular bowl shape as in the above embodiment, but as shown in FIG. It may be formed into a shape having the following. The pair of driving desks 24 makes it easier for the foreign objects to be drawn in and provides a driving force.

[Effect of idea]

According to the present invention, a pair of driving desks are rotatably disposed in the front part between the inner ends of the left and right desk cultivating bodies, and the left and right desk cultivating bodies are rotated by the rotary drive of the pair of driving desks. Since the tilling and turning of the tilled soil between the inner ends of the desk is reduced compared to the case where a pair of desks rotate on their own axis, the traction resistance is reduced, and the cutting and turning performance of the tilled soil is greatly improved. The soil is reliably cut into objects, and the turned soil that has been tilled is smoothly moved laterally to the left and right by the rotational force, thereby reducing the phenomenon of middle and high ground as much as possible. In addition, an extension case body is provided protruding from the front of the transmission case body, and the rotary drive body rotatably provided at the tip of the extension case body has a left and right universal joint, and a pair of left and right universal joints. Since the drive disks are connected, the pair of drive disks can be rotated smoothly and reliably in a state where the drive disks are set in a substantially eight-shape in plan view. Further, since the pair of driving desks and the left and right desk cultivating bodies are rotationally driven using the transmission as a common driving source, the structure is simple and easy to manufacture. Therefore, workability can be significantly improved.

[Brief explanation of the drawing]

The figures show an embodiment of the present invention; Fig. 1 is a plan view of a rotary tiller; Fig. 2 is a partially cutaway perspective view showing the drive desk and its drive mechanism;
FIG. 3 is a partially cutaway plan view of the mounting mechanism of the drive desk, and FIG. 4 is a perspective view of the drive desk showing another embodiment. 1...Machine frame, 3...Desk cultivating body, 9...Desk, 16...Case body, 24...Pair of drive desks, 25...Extension case body, 27...Rotation drive body, 29...Freely Joint.

Claims (1)

[Scope of utility model registration request] A machine frame, a left and right desk cultivating body consisting of a plurality of desks arranged in parallel at intervals for continuously tilling and inverting the soil rotatably disposed on the left and right sides of the machine frame, and the machine frame. a case body with a built-in mechanism installed in the frame and transmitting power to the left and right desk cultivating bodies;
an extension case body located between the inner ends of the left and right desk cultivating bodies and protruding from the front of the case body;
A rotary drive body is rotatably provided at the tip of the extension case body, has left and right universal joints, and is interlocked with the transmission; The soil located between the inner ends of the left and right desk cultivating bodies connected to the cylindrical supporting frame rotatably supported and the universal joints in the left and right supporting frames is directed outward in the left-right direction in advance. A rotary tillage device characterized by comprising: a pair of drive desks arranged opposite each other in a substantially eight-shape in plan view for reversing tillage.