JPH0441761Y2 - - Google Patents

Description

[Detailed description of the invention] [Purpose of the invention] (Industrial field of application) The present invention relates to a rotary tilling device that continuously plows a surface using a plurality of desks, and mainly uses a rotary tiller that plows the surface of the tiller in the middle of the desk tiller. This invention relates to a desk for pre-treatment of plowing to prevent plowing.

(Prior art) Conventionally, as this type of rotary tillage device, for example, Utility Model Application No. 1983-41102 (Utility Model Application No. 58-134490)
No.) As stated in the publication, a rotatable desk cultivating body in which a plurality of desks are arranged in parallel in the axial direction of the tilling shaft is provided on the left and right sides of the machine frame, and the inner parts of the desk cultivating bodies on the left and right sides are A pair of rotating desks for processing residual tillage are rotatably provided in the machine frame at the front part between the ends and arranged in a substantially eight-shape in plan view between the left and right desk tilling bodies. A structure has been proposed in which a pair of rotating desks plows and inverts the soil in the front part between the inner ends of the left and right desk tillers in the left-right direction.

(Problem to be solved by the invention) In the structure of the above-mentioned prior art, the pair of desks for processing residual tillage cut and till the soil while rotating under the earth pressure by being towed. Because there is
There are problems in that the traction resistance is large and the cutting performance and turning performance of soil and the cutting performance of foreign substances such as straw are poor.

Therefore, it is conceivable to drive a pair of desks for processing residual tillage, but in this case, the pair of desks must be driven while being arranged in an approximately eight-shape shape when viewed from above. There are many difficulties associated with the rotation drive means, for example, when a pair of desks are rotatably supported using a universal joint such as a cross, there is a problem that the pair of desks rotate at an inconstant speed.

The present invention was developed in view of the above points, and it is possible to rotate a pair of desks at a constant speed, which are arranged so that no residual tillage occurs between the inner ends of the left and right desk tillers. In addition to reducing the traction resistance caused by the desk, it also greatly improves the cutting performance and reversal performance for soil, as well as the performance for cutting foreign matter.
It is an object of the present invention to provide a rotary tiller that can greatly improve workability.

[Structure of the idea]

(Means for Solving the Problems) The rotary tilling device of the present invention has a machine frame 1 connected to a tractor, and a built-in transmission 5 having an input shaft 4 fixed to the machine frame 1 and inputting power from the tractor. A plurality of desks 42 are rotatably provided on the left and right rear sides of the milling case 3 and are spaced apart to continuously till and turn the soil in the axial direction of the respective tilling shafts 35.
A pair of left and right desk tillers 53 arranged in parallel, and a pair rotatably provided at the front of the transmission case 3 for tilling and reversing the soil in front of the inner ends of the left and right desk tillers 53 in the left and right direction. a driving desk 29;
The transmission case 3 is rotatably provided with a first power transmission shaft 7 for transmitting power to each of the left and right desk cultivating bodies 53 on the rear side, and a drive shaft 19 on the front part. A second power transmission shaft 8 is rotatably provided to transmit power to the pair of drive desks 29 via the transmission medium 13. The pair of drive desks 29 are connected to a pair of interlocking shafts 25 which are rotatably arranged in the front left and right parts of the mission case 3 in a substantially figure eight shape when viewed from above. The inner end portions of the pair of interlocking shafts 19 are fixed together in a shape.
Bevel gears 27 and 28 that mesh with each other are fixed, and the bevel gear 27 of one of the interlocking shafts 25 is fixed.
A bevel gear 23 fixed to the front end of the drive shaft 19 is engaged with the drive shaft 19.

(Function) The rotary tiller of the present invention not only tows the machine with a tractor, but also operates the input shaft 4 from the tractor.
The first and second power transmission shafts 7 and 8 are rotated via the transmission 5 by the input power. The first power transmission shaft 7 rotates each desk 42 in the left and right desk cultivating bodies 53, and the second power transmission shaft 8 rotates the drive shaft 19 and bevel gears 23, 27, 28. Through this, the drive disks 29 of each pair of interlocking shafts 25 are rotated in a substantially eight-shape state when viewed from above. Then, by rotating the pair of drive desks 29,
The soil located in front between the inner ends of the left and right desk tillers 53 is cut and tilled, and the tilling is reversed in the left-right direction. Further, the soil turned over by the pair of driving desks 29 is dispersed together with the tilling and turning action of the respective desks 42 of the left and right desk tillers 53. Therefore, as a whole, surface tillage is carried out in an orderly manner without particularly high raised middle and high areas, and there is no residual tillage between the inner ends of the left and right desk tillers 53. Furthermore, foreign matter is reliably cut by a pair of rotationally driven drive desks 29 and left and right desk cultivators 53.

(Example) Hereinafter, an example of the present invention will be described with reference to the accompanying drawings.

In the figure, reference numeral 1 denotes a machine frame, and a connecting part 2 for a three-point link of a tractor is provided at the front of the machine frame 1.

In addition, a transmission case 3 is placed in the middle of the machine frame 1.
is fixed, and a protruding transmission 5 with an input shaft 4 facing forward is built into the upper part of the transmission case 3, and a first power transmission shaft 7 is located below the output shaft 6 of this transmission 5. A second power transmission shaft 8 is rotatably suspended horizontally on the mission case 3, and is located in front of the first power transmission shaft 7, and is connected to the mission case 3 via a bearing 9. It is suspended horizontally so that it can rotate freely. In addition, sprockets 10,
11 and 12 are fixed, and each sprocket 1
An endless chain 13 as an interlocking medium is rotatably suspended between 0, 11, and 12, and a tension roller 14 is engaged with an intermediate portion of the endless chain 13. It is supported by an adjustment rod 46 that is provided on the case 3 so as to be able to move forward and backward. Further, a bevel gear 17 is integrally fixed to one side of the second power transmission shaft 8.

Next, a shell 18 is removably attached to the front end of the transmission case 3, and a drive shaft 19 is provided on the shell 18 so as to be rotatable in the front-rear direction via a bearing 20. A bevel gear 2 meshed with the bevel gear 17 at the rear end of 19.
1 are integrally attached. In addition, the drive shaft 1
A bevel gear 23 for outputting the gear interlocking mechanism 22 is integrally fixed to the front end of the gear mechanism 9 .

A bearing body 24 is integrally fixed to the tip of the shell 18, and a pair of interlocking shafts 25 are disposed on both sides of the bearing body 24 so as to be close to both sides of the tip of the drive shaft 19 from the cross direction. are rotatably arranged through bearings 26 in a substantially inverted eight shape in plan view, and the input of the gear interlocking mechanism 22 is provided at the inner ends of the pair of interlocking shafts 25 that are close to each other so as to intersect with each other. Bevel gear 27 for and this bevel gear 27
A bevel gear 28 for interlocking of the gear interlocking mechanism 22 meshed with is integrally fixed, and this bevel gear 27 for input is meshed with the bevel gear 23 for output. Further, bosses 30 of a pair of bowl-shaped driving desks 29 are integrally fitted to the outer sides of the pair of interlocking shafts 25, and nuts 31 are fixed to the outer ends of the pair of interlocking shafts 25. This nut 31 is intended to prevent each drive disk 29 from coming off. The pair of left and right driving desks 29 are attached to the respective interlocking shafts 25 in a substantially eight-shape shape when viewed from above.

Next, a universal joint 33 is rotatably connected to both ends of the first power transmission shaft 7 via a connecting body 32, and the inner end of a tilling shaft 35 is connected to the shaft portion 34 of the left and right universal joints 33. The outer ends of the left and right tilling shafts 35 are connected to the bearings 3 at the lower ends of the brackets 36.
The outer end of a connecting arm 38 is fixed to the upper end of the left and right brackets 36, and the inner end of the connecting arm 38 is connected to the vertical axis 3.
9, it is pivotally connected to the supporting frame 40 of the mission case 3 so as to be rotatable in the horizontal direction.

In addition, a plurality of circular bowl-shaped desks 42 are integrally attached to the left and right tilling shafts 35 at predetermined intervals through spacers 41 in the axial direction, that is, at intervals for continuously tilling and reversing the soil. The outer end of a telescopic bellows-shaped covering 43 that covers the outer periphery of the universal joint 33 is rotatably attached to the inner end of the spacer 41 of the innermost desk 42. The inner end of this covering 43 is fixed to the mission case 3 at the outer periphery of the connecting body 32.

Further, one end of a support arm 44 is rotatably attached to the intermediate portion of the left and right connecting arms 38 via a support shaft 45, and the other end of this left and right support arm 44 is attached to the left and right portions of the machine frame 1. Advancement/retraction adjustment mechanism 46 provided in
It is attached via a support shaft 47 to be adjustable in forward and backward movement. Furthermore, an extension arm 48 is provided at the rear end portions of the left and right support arms 44 in a parallel manner protruding rearward facing each other, and a gauge wheel 49 is connected to the rear portion of the left and right extension arms 48 in a height-adjustable manner. It is set up.
Further, a safety cover 50 for each of the desks 42 is integrally fixed to the left and right connecting arms 38.

Further, a tilling blade 51 is removably attached and integrally hung approximately in the middle of the horizontal part of the transmission case 3, and the tilling blade 51 allows the tilled area to be removed between the pair of pre-processing drive desks 29. The system is designed so that there are no remaining tillage areas. In the figure, reference numeral 52 denotes an operating handle, and by adjusting the operating handle 52 forward and backward, the ground height of the driving desk cultivating bodies 53 on both sides, which are made up of the respective desks 42 on both sides, can be freely adjusted and set. .

In this structure, the three-point link of the tractor is connected to the connecting part 2 of the machine frame 1, and the power take-off part of the tractor is connected to the input shaft 4 of the transmission 5. Then, as the machine is towed by the tractor, the output shaft 6 of the transmission 5 is rotated by the power input from the PTO shaft of the tractor to the input shaft 4, and the endless chain 13 is rotated by the power from the output shaft 6. Each of the first and second power transmission shafts 7 and 8 is rotated through the shaft.

Each desk 42 in the left and right driving desk cultivating bodies 53 is rotationally driven by the first power transmission shaft 7, and the tilled soil is tilled in a predetermined width by each desk 42 of the left and right driving desk cultivating bodies 53. be done. In addition, the second power transmission shaft 8 also connects bevel gears 17, 20, drive shaft 19, bevel gear 23,
Each pair of driving desks 29 is driven to rotate in a substantially eight-figure shape in a plan view through the pair of interlocking shafts 27, 28 and the pair of interlocking shafts 25, and the cultivated soil is plowed and reversed in the left-right direction by the pair of driving desks 29. That is,
The pair of driving desks 29 are located in the front part between the inner ends of the left and right driving desk cultivating bodies 53, and are forcibly rotated in advance at a position slightly ahead of the left and right driving desk cultivating bodies 53. The tilled soil is cut and tilled and turned over in the left and right direction, and the left and right drive desk tillers 53 are used for each test 4.
2, the tilled soil is cut and plowed together with the soil that is turned over by the pair of driving desks 29 and turned over. Further, the tilled soil between the pair of driving desks 29 is treated as residual tillage by the tilling blade 51. Therefore, as a whole, surface plowing is carried out in an orderly manner without particularly high raised middle and high portions, and there is no residual plowing portion between the inner ends of the left and right drive desk cultivating bodies 53. Further, foreign matter is reliably cut by a pair of rotationally driven driving desks 29 and left and right driving desk cultivating bodies 53.

[Effect of idea]

According to the present invention, a first power transmission shaft for transmitting power to the left and right desk cultivating bodies is rotatably provided at the rear side of the mission case, and a pair of power transmission shafts are connected to the front part of the mission case via a drive shaft. A second power transmission shaft for transmitting power to the driving desk is rotatably provided, and the pair of driving desks are each engaged with the inner ends of a pair of interlocking shafts that are fixed together in a substantially eight-shape shape when viewed from above. Since the bevel gear of the drive shaft is engaged with one of the bevel gears, the pair of drive desks are forcibly and reliably moved by the power transmitted from the transmission via the interlocking medium and the gear mechanism. It is rotatably driven and can greatly reduce traction resistance compared to a desk that is mounted on an axis so that it rotates on its own axis. It can also reliably cut the soil and turn the plowing process, and it can also remove scattered foreign objects. It is possible to reliably cut it and prevent it from becoming entangled with the pair of drive desks. In addition, the power from the transmission is transmitted through a gear mechanism consisting of bevel gears to a pair of interlocking shafts provided in an approximately inverted eight shape when viewed from above, which have a pair of driving desks fixed in an approximately eight shape when viewed from above. Therefore, the power transmission to the pair of interlocking shafts is reliable, and the pair of drive desks can always be rotated at a constant speed. The structure is simple, as the pair of drive desks do not rotate at inconstant speeds. Therefore, the pair of drive desks allows tillage to be carried out at a predetermined plowing depth without causing any residual tillage between the inner ends of the left and right desk tillers, and without being adversely affected by foreign matter across the width of the left and right desk tillers. It is possible to improve workability.

[Brief explanation of the drawing]

The figures show an embodiment of the present invention. Figure 1 is a side view of the rotary tiller, Figure 2 is a partially cutaway plan view of the same, and Figure 3 is a partially cutaway diagram of the power transmission mechanism. The side view and FIG. 4 are cross-sectional views of the drive mechanism of the drive desk. 1... Machine frame, 3... Mission case, 4...
Input shaft, 5...Mission, 7...First power transmission shaft, 8...Second power transmission shaft, 13...Interlocking medium, 19...Drive shaft, 22...Gear interlocking mechanism, 2
3, 27, 28...bevel gear, 25...interlocking shaft, 29...a pair of drive desks.

Claims (1)

[Scope of Claim for Utility Model Registration] A machine frame connected to a tractor, a transmission case with a built-in transmission having an input shaft fixed to the machine frame and inputting power from the tractor, and rear left and right parts of the transmission case. The left and right desk tillers are rotatably installed in the respective tillers, and have a plurality of desks arranged side by side at intervals for continuously tilling and reversing the soil in the axial direction of the respective tilling shafts, and the front part of the above-mentioned cultivation case. a pair of drive desks that are rotatably provided and that plow and invert the soil in the left and right direction between the inner ends of the left and right desk tilling bodies; The first one transmits power to each of the desk cultivating bodies.
A power transmission shaft is rotatably provided, and a second power transmission shaft is rotatably provided in the front portion for transmitting power to the pair of drive desks via the drive shaft, and the first and second power transmission shafts are rotatably provided. Each of the shafts is interlocked and connected to the transmission via an interlocking medium, and the pair of drive desks are rotatably arranged in an approximately inverted eight shape in plan view on the left and right front sides of the transmission case. The pair of interlocking shafts are integrally fixed in a substantially eight-shape shape when viewed from above, and bevel gears meshing with each other are fixed to the inner ends of the pair of interlocking shafts, and the front end of the drive shaft is attached to the bevel gear of one of the interlocking shafts. A rotary tiller characterized by meshing bevel gears fixed to the parts.