Rotary tiller

Abstract

To provide a rotary tiller which can reliably level uneven ground in a tillage work.SOLUTION: A rotary tiller includes a first tiller unit and a second tiller unit which perform tillage work and are arranged in a right-left direction and connected at a connection part at an upper ends of a front power case and a rear power case. The connection part includes a mission case which decelerates and distributes power. An output of an engine is transmitted from the front power case to a rotary via the mission case, and transmitted from the rear power case to a drive unit. A depth adjustment front wheel, which defines a depth, and the rotary are arranged at a lower end part of the front power case. The drive unit is arranged at a lower end of the rear power case. The drive unit is a crawler including front and rear idler wheels and an intermediate upper drive wheel. The tiller employs means such that during a tillage work, relative positions of the right and left rotary and right and left drive parts remain constant.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a rotary tiller, and more particularly to a technology of a double rotary tiller that can flexibly adapt to the unevenness of farmland.

Background Art

[0002] Conventionally, in a rotary tiller for creating a tillage furrow in agricultural work, when there are unevenness on the ground, the rotary tiller may move up and down along the unevenness, and the ground cannot be made sufficiently flat. Therefore, there has been a demand for a rotary tiller that can stably flatten the ground.

[0003] For such fields, various technologies have been proposed conventionally. For example, a ridging machine (see Patent Document 1) has been proposed and is a known technology. More specifically, it includes a rotor 3 that tills the groove between ridges and flings the cultivated soil onto the side surface of the ridge, and a forming plate 5 that presses the side surface of the ridge including the flung cultivated soil. The forming plate 5 has a length extending from the middle part to the upper side of the side surface of the ridge, and the lower part is supported by the machine body 1 with a hinge 9 so as to undulate with respect to the ridge. The pressing force transmission mechanism 12 that is connected to the power take-off shaft 11 of the prime mover 7 and applies a pressing force to the forming plate 5 is disposed above the power take-off shaft 11 and is connected to the upper part of the forming plate 5. However, during the management work, the operation for coping with the unevenness of the ground is not described, and the above problems have not been solved.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] In view of the above problems, an object of the present invention is to provide a rotary management machine that can surely make the ground flat even if the ground has unevenness.

Means for Solving the Problems

[0006] To solve the above problems, the present invention is a walking-type two-stage rotary management machine, which has a first management unit and a second management unit for performing management work, and a connecting unit for connecting the first management unit and the second management unit. The first management unit and the second management unit each have a front wheel for depth adjustment, a rotary for scraping out soil, a drive unit for advancing the management machine, a front-side power case for transmitting power to the rotary, and a rear-side power case for transmitting power to the drive unit. The first management unit and the second management unit are arranged in parallel in the left-right direction, and are connected to the connecting unit at the upper ends of the front-side power case and the rear-side power case. An engine for generating power is arranged at the upper part of the first management unit, and a handle for operating the rotary management machine is arranged at the second management unit. The connecting unit has a transmission case for reducing speed and distributing power. The output of the engine is transmitted from the front-side power case to the rotary and from the rear-side power case to the drive unit via the transmission case. The front wheel for depth adjustment and the rotary for adjusting the scraping depth of the rotary are arranged at the lower end of the front-side power case, and the drive unit is arranged at the lower end of the rear-side power case. The drive unit is a crawler, which has front and rear idler wheels and a driving wheel at the upper part between the front and rear idler wheels, and means are adopted to keep the relative positions of the left and right rotaries and the left and right drive units constant during the management work.

[0007] Further, the present invention adopts means that the left and right front-side power cases and the rear-side power case are fixed to the connecting unit, and the left and right front-side power cases and the rear-side power case are fixed by side frames.

[0008] Furthermore, the present invention adopts means that the distance from the axis of the driving wheel to the axis of the rear idler wheel is longer than the distance from the axis of the driving wheel to the axis of the front idler wheel.

[0009] Furthermore, the present invention adopts means such that the height of the axis of the drive wheel of the crawler is higher than the height of the rotation range of the rotary, and the value of the ratio of the horizontal distance from the axis of the drive wheel to the front idler wheel to the vertical distance from the axis of the drive wheel to the idler wheel is within the range of 0.4 to 0.5, and the value of the ratio of the horizontal distance from the axis of the drive wheel to the rear idler wheel to the vertical distance from the axis of the drive wheel to the idler wheel is within the range of 0.9 to 1.1.

[0010] Furthermore, the present invention adopts means such that the front wheels for depth adjustment can be adjusted in height independently on the left and right, and a height difference of 5 cm or more can be provided between one and the other, and the height adjustment of the front wheels for depth adjustment can be adjusted by rotating an adjustment lever via a flexible wire, and the adjustment lever is in an adjustable position while the operator is operating the handle.

[0011] Furthermore, the present invention adopts means such that one or both of the front wheels for depth adjustment can be bounced up.

[0012] Furthermore, the present invention adopts means such that moving wheels are arranged at the rear end of the side frame.

[0013] Furthermore, the present invention adopts means such that the muffler of the engine is arranged on the side of the engine, the exhaust from the muffler is discharged in the side direction, and the second control unit including the handle is on the side where the exhaust from the muffler does not reach as viewed from the first control unit.

[0014] And furthermore, the present invention adopts means such that both the front power case and the rear power case are fixed to the connecting portion in a shape where the upper part is inclined backward and the lower part protrudes forward.

[0015] Furthermore, the present invention has a rotary cover above the rotary, a side portion at the edge of the rotary cover, the side portion is rotatable about the edge, has a wire for rotating the side portion, and the end of the wire is connected to a lever near the handle, and adopts means that the side portion can be rotated by operating the lever.

Effect of the Invention

[0016] According to the rotary management machine of the present invention, in management work, even if there are irregularities on the ground, it can be surely flattened, and the efficiency of agricultural work can be realized.

Brief Explanation of the Drawings

[0017]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Mode for Carrying Out the Invention

[0018] The rotary management machine according to the present invention is characterized in that, in management work, even if there are irregularities on the ground, it can be surely flattened. Hereinafter, an embodiment of the rotary management machine according to the present invention will be described with reference to the drawings. Note that the overall configuration of the rotary management machine and the configuration of each part shown below are not limited to the embodiments described below, and can be appropriately changed within the scope of the technical idea of the present invention, that is, within the scope of shapes, dimensions, structures, etc. that can exhibit the same operational effects. Also, unless otherwise specified, the right side and the left side are the right side and the left side when facing the forward direction of the management machine.

[0019] The present invention will be described with reference to FIGS. 1 to 7. FIG. 1 is an overall perspective view showing an embodiment of the rotary management machine according to the present invention. FIG. 2 is a perspective view showing the flow of power transmission in an embodiment of the rotary management machine according to the present invention. FIG. 3 is a schematic diagram for explaining the response to unevenness of the ground in an embodiment of the rotary management machine according to the present invention, (a) shows the operation in the case of an isosceles triangle crawler, (b) shows the operation in this embodiment, and (c) shows the arrangement of forces at the left and right management parts. FIG. 4 is a schematic diagram for explaining the relationship between the center of gravity and the crawler in an embodiment of the rotary management machine according to the present invention, (a) shows the center of gravity during work, (b) shows the center of gravity during movement, and (c) shows the center of gravity when moving while tilting. FIG. 5 is a schematic diagram for explaining the positional relationship between the handle and the adjustment lever in an embodiment of the rotary management machine according to the present invention, and the relationship between the side part of the rotary cover and the adjustment lever. The rotary cover is in a state of being rotated upward by about 45 degrees. FIG. 6 is a schematic diagram for explaining the positional relationship between the engine muffler and the handle in an embodiment of the rotary management machine according to the present invention. FIG. 7 is a schematic diagram for explaining the bounce of the front wheel in an embodiment of the rotary management machine according to the present invention, (a) shows the use of the front wheel, and (b) shows the state where the front wheel is bounced up.

[0020] The rotary management machine 1 according to the present invention is a walking type double rotary management machine, which simultaneously performs management work on two rows of grooves (between ridges) on the left and right across the ridge. The rotary management machine 1 is mainly composed of a first management unit 10, a second management unit 11, and a coupling unit 30. The first management unit 10 and the second management unit 11 are parts that perform the operation of scraping up soil of a certain depth in order to form ridges or the like. Since they are in a pair, they can work simultaneously at two locations. As shown in FIG. 1, the first management unit 10 and the second management unit 11 are arranged in parallel side by side and are connected to the coupling unit 30 at the upper ends of the front power case 40 and the rear power case 50. The distance between the first management unit 10 and the second management unit 11 is approximately the same as the distance between ridges. The first management unit 10 and the second management unit 11 perform operations straddling the ridges. The first management unit 10 and the second management unit 11 include a front wheel 70 for depth adjustment, a rotary for scraping out soil, a driving unit for advancing the management machine, a front power case 40 for transmitting power to the rotary, and a rear power case 50 for transmitting power to the driving unit. A transmission case 33 or the like is arranged in the coupling unit 30, an engine 31 or the like is arranged on the upper part of the first management unit 10, and a handle 80 or the like is arranged in the middle section of the second management unit 11. The relationship between the first management unit 10 and the second management unit 11 can be either on the left or right. In this embodiment, with respect to the traveling direction of the management machine, the right side is the first management unit, and the left side is the second management unit 11.

[0021] The coupling unit 30 connects the upper parts of the first management unit 10 and the second management unit 11 arranged in parallel. Also, the coupling unit 30 has a transmission case. The transmission case 33 appropriately performs driving, stopping, decelerating, separating, etc. on the driving output generated by the engine 31 through the transmission inside the transmission case. The driving output generated by the transmission case is appropriately distributed to the first management unit 10 and the second management unit 11.

[0022] The management unit consists of a part for advancing the management machine, a part for scraping up soil, and a part for adjusting the scraping depth. Further, an engine 31, a handle 80, etc. are appropriately arranged at the upper part or the middle part of the management unit. First, the common parts of the first management unit 10 and the second management unit 11 will be described. The common parts mainly include a front power case 40 and a subsequent rotary part 42, a rear power case 50 and a subsequent crawler 60, and a side frame 20 for fixing the front power case 40 and the rear power case 50.

[0023] The front power case 40 is a part for transmitting the power to the rotary part 42 via the front leg part 41. As a whole, it is rod-shaped, with the upper part connected to the connecting part 30 and the lower part connected to the front leg part 41. The lower part of the front power case 40 is arranged in front of the upper part. The front leg part 41 is connected to the lower part of the front power case 40 and protrudes obliquely forward. The rotary part 42 is arranged at the lower end of the front leg part 41. Inside the front power case 40, chains with rotating shafts at both ends are arranged corresponding to the rotating shafts. The rotary power generated in the transmission case 33 passes through the inside of the connecting part 30 and is transmitted to the rotating shaft at the upper part of the front power case 40. The power is transmitted from the rotating shaft at the lower part of the front power case 40 to the front leg part 41. Inside the front leg part 41, chains with rotating shafts at both ends are arranged corresponding to the rotating shafts. The power transmitted from the front power case 40 to the front leg part 41 is transmitted from the rotating shaft at the lower end of the front leg part 41 to the rotary part 42 to rotate the rotary part 42. A rotary cover 44 and a depth-adjusting front wheel 70 are arranged on the front leg part 41. In this embodiment, the front power case 40, the connecting part 30, and the front leg part 41 are fixed and integrated.

[0024] The front wheel 70 for depth adjustment is a wheel for adjusting the depth of scraping by the rotary part 42. When the front wheel 70 is raised with respect to the rotary part 42, the depth of scraping by the rotary part 42 becomes deeper. Conversely, when the front wheel 70 is lowered with respect to the rotary part 42, the depth of scraping by the rotary part 42 becomes shallower. The front wheel 70 for depth adjustment is fixed to the front leg part 41 by the front wheel support frame 75. It has a depth adjustment part 71, and changes the height of the front wheel by means of a screw neck or the like. The front wheels 70 for depth adjustment are respectively arranged on the left and right management machines. Due to the difference in height between the left and right ridges, the height can be changed independently for each of the left and right. The difference in height between the left and right front wheels 70 for depth adjustment can be widened up to a maximum of 5 cm. The depth adjustment part 71 is connected to the height adjustment lever 74 near the handle 80 via a flexible wire 73. By rotating the adjustment lever 74, the rotational movement is transmitted to the depth adjustment part 71 via the flexible wire 73, and the height of the front wheel can be adjusted. A flexible wire is a device for transmitting rotational motion between two objects that are not fixed to each other. This is composed of a rotating wire or the like, has flexibility, and has a certain torsional rigidity. In this embodiment, the adjustment lever 74 of the front wheel 70 for depth adjustment of the first management part 10 is arranged near the lower left of the engine 31. The adjustment lever 74 of the front wheel 70 for depth adjustment of the second management part 11 is arranged near the handle 80. The height of the front wheel may need to be adjusted frequently depending on the condition of the farmland. Therefore, by arranging the adjustment lever 74 in such a position, the two adjustment levers 74 are in an operable position while the operator S is operating the handle, and the adjustment work can be performed smoothly (Fig. 5).

[0025] After the work in a series of ridges is completed and moving on to work in another ridge, it may be easier to move if the front wheels are bounced up. Therefore, an embodiment having a mechanism for bouncing up the front wheels is also suitable. As shown in Fig. 7, it has a mechanism capable of locking the front wheels at a plurality of angles, and by pulling the front wheels with a wire or the like, the front wheels can be bounced up or the angle of the front wheels can be adjusted. Bouncing up is possible for one or both of them. Fig. 7(a) shows the state where the front wheels are lowered. From this state, by pulling the wire, the locking position of the bouncing-up part 72 can be changed, and the front wheels can be bounced forward (Fig. 7(b)). By making the wire operable near the handle 80, the operator can bounce up the front wheels while operating the handle, and the work efficiency can be improved.

[0026] The rotary part 42 is a part that scrapes up the cultivated soil by a plurality of rotating scraping claws 43. The rotary part 42 is in a state where a part of the scraping claws 43 is below the ground with respect to the ground contact surfaces of the front wheels and the crawlers. Therefore, the scraping claws 43 below the ground can scrape up the ground. The soil scraped up is prevented from scattering by the rotary cover 44, so it is piled up near the area where the scraping operation is performed.

[0027] The rotary cover 44 is a part that receives the soil scraped up by the rotary part 42, drops it at a predetermined position, and piles up the soil for the ridge. The rotary cover 44 is rotatably fixed to the front leg part 41. Adjust the angle of the rotary cover 44 according to the method of making the ridge. Also, a side part 45 is rotatably installed at the edge of the rotary cover 44. The side part 45 is a part that adjusts the range of piling up the soil. By spreading the side part 45, it can be adjusted to scatter the soil to a wide position, and by closing the side part 45, it can be adjusted to scatter the soil to a narrow position.

[0028] In some cases, it may be desired to adjust the range of the soil heaping while moving the control machine. Therefore, a side part adjustment lever 79 is provided to remotely move the side part 45 from near the handle 80 (Fig. 5). The side part 45 is connected to the side part adjustment lever 79 via a side part wire 78. The side part wire 78 is a push-pullable wire. By operating the side part adjustment lever 79, the side part 45 can be rotated, the angle with respect to the rotary cover 44 can be changed, and the ridge range can be adjusted. In Fig. 5, the side part adjustment lever 79 is arranged for each of the left and right control parts. The side part adjustment lever 79 for adjusting the side part 45 of the right control part is arranged on the right side of the handle 80, and the side part adjustment lever 79 for adjusting the side part 45 of the left control part is arranged on the left side of the handle 80. Therefore, the operator can adjust the angle of the side part 45 for each of the left and right control machines.

[0029] Also, by having the side part adjustment lever 79 for each side part 45, the angles of the four side parts 45 can be adjusted respectively, so fine settings can be made, which is convenient. Also, by adjusting the four side parts 45 with a single side part adjustment lever 79, the angles can be adjusted all at once, which is convenient. In Fig. 5, the state of rotation of the side part 45 is shown by a dotted line. In this way, by remotely moving the side part 45, the operator can adjust the angle of the side part 45 while moving the control machine, so the state of the ridge can be adjusted at any time, which is convenient.

[0030] The rear power case 50 is a part that transmits power to the crawler 60. As a whole, it is rod-shaped, the upper part is connected to the connecting part 30, and the lower part is connected to the crawler 60. The lower part of the rear power case 50 is arranged in front of the upper part. Also, the lower part of the front power case 40 is arranged in front of the upper part. In other words, the entire front power case 40 and rear power case 50 are in a state of being slightly tilted backward. Therefore, the center of gravity of the management machine is behind the axis of the driving wheel 61. Inside the rear power case 50, there are rotating shafts at both ends, and chains corresponding to the rotating shafts are arranged. The power for the crawler, which is generated in the transmission case 33, passes through the inside of the connecting part 30 and is transmitted to the rotating shaft at the upper part of the rear power case 50. The power is transmitted from the rotating shaft at the lower part of the rear power case 50 to the driving wheel 61 of the crawler 60 to drive the crawler 60.

[0031] The crawler 60 is a driving part of the management machine. It has a driving wheel 61, a front idler wheel 62, a rear idler wheel 63, an idler wheel support frame 64, a crawler belt 65, and a rotating part 66. As shown in FIG. 1 and the like, the crawler 60 is triangular as a whole. It has a driving wheel 61 at the upper part, a front idler wheel 62 and a rear idler wheel 63 at the lower part, and the idler wheels are held by the idler wheel support frame 64. The periphery is surrounded by the crawler belt 65. The power from the rear power case 50 is transmitted to the driving wheel 61, the driving wheel 61 rotates, the crawler belt 65 moves, and it moves forward. Since the crawler belt 65 has a larger ground contact area than a normal wheel, it does not harden the passage as much as possible, especially in the cultivation of crops such as leeks, and traction can also be expected. Due to the triangular shape of the crawler 60, on the side of the front idler wheel 62, the height of the crawler belt 65 increases, so that the crawler 60 can move forward without being buried in the soil scraped up by the rotary part 42. On the side of the rear idler wheel 63, since the height of the crawler belt 65 increases, the inclination angle of the belt becomes steep, so that the soil attached to the crawler belt 65 can be naturally dropped off. The rotating part 66 is a part that rotatably connects the rear power case 50 and the crawler 60. It is almost fixed during the management work, but for movement etc., when lifting the front part of the management machine as shown in FIG. 4(b), it is rotated by the rotating part 66 with the driving wheel 61 as the axis. The rotating part 66 may be provided with a stopper that limits the rotation angle in order to prevent unnecessary rotation.

[0032] The crawler 60 is generally triangular in side view, but is not an equilateral triangle, and is a scalene triangle with the rear idler 63 extending rearward. That is, the distance from the axis of the drive wheel 61 to the axis of the rear idler 63 is longer than the distance from the axis of the drive wheel 61 to the axis of the front idler 62. Also, the height of the axis of the drive wheel 61 is higher than the height of the rotation range of the rotary part 42. If it is lower than the height of the rotation range of the rotary part 42, the crawler 60 may be buried in the soil scraped up by the rotary part 42. As the ratio of the triangle of the crawler 60, the value of the ratio of the horizontal distance from the axis of the drive wheel 61 to the front idler 62 to the vertical distance from the axis of the drive wheel 61 to each idler is within the range of 0.4 to 0.5, and the value of the ratio of the horizontal distance from the axis of the drive wheel 61 to the rear idler 63 to the vertical distance from the axis of the drive wheel 61 to each idler is within the range of 0.9 to 1.1. By setting such a ratio, the rear idler 63 extends rearward, and as a management mechanism, the possibility of tipping backward can be reduced. For example, when raising the inclination in order to mount the management machine on a truck or the like, as shown in Fig. 4(c), the management machine can be moved without tipping even on a steeper inclination.

[0033] The front power case 40, the rear power case 50, the connecting part 30, and the front legs 41 are fixed and integrated. However, if the front power case 40 and the rear power case 50 are fixed only at one location of the connecting part 30 at the end, it is unstable in terms of strength, and if a load is applied to the front power case 40 or the rear power case 50 during the management work, the fixed part with the connecting part 30 may be damaged. Therefore, the middle section of the front power case 40 and the rear power case 50 is fixed using the side frame 20. By using the side frame 20, the front power case 40 and the rear power case 50 are firmly fixed while maintaining a certain angle with respect to the connecting portion 30. At the rear end of the side frame 20, a rear support wheel 21 for movement is arranged. When the front part of the management machine is lifted, as shown in FIG. 4(b), the rear support wheel 21 descends and touches the ground, and the management machine is supported and moved by the crawler 60 and the rear support wheel 21. Due to the presence of the rear support wheel 21, the management machine can move stably even when the front part is lifted.

[0034] An engine 31 is arranged on the upper part of the first management unit 10. The engine 31 is the power source of the management machine. It generates power using fuel such as gasoline. The power of the engine 31 enters the transmission case 33 through the inside of the connecting portion 30 and is appropriately decelerated, distributed, etc. The engine 31 has a muffler 32 for discharging exhaust. The muffler 32 is arranged on the right side when viewed from the traveling direction of the management machine. Therefore, the exhaust from the engine 31 is discharged in the right side direction of the engine 31. The exhaust gas contains carbon monoxide, hydrocarbons, nitrogen oxides, etc., and is harmful if directly inhaled by the operator S. Therefore, the second management unit 11 including the handle 80 is arranged on the side where the exhaust from the muffler 32 does not reach when viewed from the first management unit 10. In other words, the first management unit 10 where the engine 31 is arranged is arranged on the right side, and the second management unit 11 where the handle 80 is arranged is arranged on the left side (FIG. 6). With such an arrangement, the exhaust gas from the muffler 32 is discharged in the direction opposite to the operator S, so that the operator S is not exposed to the exhaust gas, and the working environment can be improved. Also, since the handle position, that is, the position where the operator is located, is separated from the engine, the heat of the engine can be avoided, which is particularly essential during summer work.

[0035] A handle 80 is disposed in the middle stage of the second management unit 11. The handle 80 has grip portions at two rod-shaped ends, similar to a general management machine. The operator S holds the grips with both hands, determines the direction of the management machine, and advances the management machine. A clutch lever for turning the power on and off, a shift lever for setting the deceleration, an accelerator lever, etc. are disposed on the handle portion. Also, as shown in FIG. 5, a safety bar 81 is provided attached to the handle 80. The safety bar 81 is horizontally long and is rod-shaped extending to the vicinity of the left and right grips. During operation, by pressing the safety bar 81, the management machine can be emergently stopped. Since the safety bar 81 is large in the horizontal direction, in an emergency, by pressing somewhere on the bar, the management machine can be immediately stopped, and the safety aspect of the management machine can be strengthened. Also, left and right height adjustment levers 74 are disposed near the handle 80. Also, since the lever for operating the engine 31 is on the operator side, the operator S can easily perform operations related to the engine 31 from the state of operating the handle.

[0036] The flow of power transmission in the management machine will be described with reference to FIG. 2. Power is generated by the engine 31 (A). The power from the engine 31 passes through the inside of the coupling portion 30 and is transmitted to the transmission case 33. In the transmission case 33, the rotational speed, the rotational direction, and the presence or absence of drive are controlled, and power for the crawlers and power for the rotary are generated. The power for the crawlers is transmitted (B) by the drive shaft in the coupling portion 30 to the left and right rear power cases 50, passes through the inside of the rear power cases 50 (D), and is transmitted to the respective drive wheels 61 to drive the left and right crawlers 60. The rotary driving power is transmitted (C) by the drive shaft in the coupling portion to the left and right front power cases 40, passes through the inside of the front power cases 40 (E), passes through the inside of the front legs 41 (F), and is transmitted to the left and right rotary portions 42 to rotate the rotary portions 42. In this way, by transmitting power from one engine to the left and right control units, it is possible to simultaneously perform management operations on two ridges or the like.

[0037] For movement and the like, the management machine can rotate the entire part other than the crawler 60 by the rotating part 66 around the crawler 60. Mainly, when moving the management machine, by lifting the rotary part 42 from the ground, the movement is facilitated. When rotating so as to lift the front side, the operator S rotates by pushing down the handle 80. When the center of gravity of the management machine in the front-rear direction is at the position of the dotted line in Fig. 4(a), it is at the position passing through the axis of the rotating part 66, so it is stable in a balanced state. However, a lot of force is required when lifting the front. On the other hand, by tilting the rear power case 50 slightly backward, as shown by the arrow in Fig. 4(a), the center of gravity is behind the rotating part, and it is always in a state of having a slightly backward rotating force. Therefore, when lifting the front, the force of pushing down the handle 80 can be reduced, so the work efficiency can be improved.

[0038] When making ridges or the like with the management machine, if the unevenness of the ground of the farmland is large, the management machine will also move up and down accordingly, and the ridges or the like may not be made well. However, by using this management machine, the unevenness of the ground can be made flat. The operation will be described with reference to Fig. 3. This management machine is a management machine that simultaneously performs operations on two rows of ridge spaces straddling the ridge. While scraping up the ground with the rotary part 42, it moves forward. As an example, the case where there is a convex part in front of one rotary part 42 will be described. The rotary part 42 scrapes up the convex part, but since the ground is raised at the convex part, the scraping load of the rotary part 42 increases rapidly. Therefore, an upward force (U) is generated on the rotary part 42. Then, the upward force (U) becomes a force that lifts the front upward as the entire management machine. At this time, the control machine has the front power case 40, the rear power case 50, the connecting part 30, and the front leg part 41 fixed integrally. During the control operation, the crawlers 60 are also almost integrated. Therefore, the upward force (U) on the rotary part 42 becomes a downward force (D) that presses down near the rear idler wheel 63 of the crawler 60 with the point P on the extension line of the center of gravity of the control machine as the fulcrum (Fig. 3(a)). Since the crawler has a large ground contact area, the force U spreads over the entire ground contact surface of the crawler, so it does not sink into the ground and corresponds to the force U. Therefore, the upward force on the rotary part 42 can be suppressed, and the rotary part 42 can scrape up all the convex parts and flatten the convex parts. In addition, since the position of the rear idler wheel 63 is shifted to the rear part, the force D that further suppresses the upward force U on the rotary part 42 is increased, which is preferable (Fig. 3(b)). Furthermore, in this control machine, since the control parts are in a double series, the force D that suppresses the upward force U on the rotary part 42 can be generated in a coordinated manner by the left and right control parts (Fig. 3(c)). Therefore, with the forces D1 and D2, the upward force on the rotary part 42 is limited with respect to the force U, so the ground can be flattened more stably.

[0039] In this way, at least during the control operation, due to the relative positions of the left and right rotaries and the left and right drive parts being constant, it becomes possible to generate a force opposing the force generated at the front side of the control machine at the rear side, and prevent the rotary part 42 from floating. If the relative positions are not constant, the front power case 40 and the rear power case 50 will move independently, and the rotary will only scrape up the upper part of the convex part, and the ground cannot be flattened.

[0040] In this way, according to the rotary control machine according to the present invention, due to the relative positions of the left and right rotaries and the left and right drive parts being constant, even if there are irregularities on the ground during the control operation, it can be flattened, and the efficiency of agricultural work can be improved.

[0041] Also, by fixing the front power case 40 and the rear power case 50 with the side frame 20, the fixing between the front power case 40 and the rear power case 50 can be strengthened.

[0042] Furthermore, since the distance from the starting wheel 61 to the rear idler wheel 63 is longer than the distance to the front idler wheel 62, it is possible to prevent tipping backward and prevent the front part of the management machine from rising during operation.

[0043] Moreover, the height of the front wheels 70 for depth adjustment can be adjusted independently on the left and right, and the difference between the left and right can be made 5 cm or more, so it is possible to cope with the unevenness of the farmland.

[0044] Furthermore, since the height adjustment of the front wheels 70 for depth adjustment can be performed around the handle 80, there is no need to move forward for each adjustment, which is convenient.

[0045] Moreover, since the front wheels 70 for depth adjustment can be flipped up, when it is necessary to raise the front wheels during movement or the like, the position of the front wheels can be changed more quickly and easily than by height adjustment, which is convenient.

[0046] Furthermore, by arranging the moving wheels at the rear end of the side frame 20, the amount of lifting the front side during movement becomes constant, and the posture during movement is stabilized, which is convenient.

[0047] Moreover, since the position of the handle 80 is on the side opposite to the exhaust direction of the muffler 32 of the engine 31, the operator S is free from the risk of inhaling the exhaust gas, and the working environment can be improved.

[0048] And also, by tilting the front power case 40 and the rear power case 50 backward and moving the center of gravity of the management machine behind the axis of the starting wheel 61, the force of pushing down the handle 80 to raise the front part during movement can be reduced, and the working efficiency can be improved.

Industrial Applicability

[0049] The rotary management machine according to the present invention contributes to the improvement of agricultural work efficiency. Specifically, it is useful for highly efficient generation and management work of ridges and the like in agricultural land, and is considered to have great industrial applicability.

Explanation of Signs

[0050] 1 Rotary management machine 10 First management unit 11 Second management unit 20 Side frame 21 Rear support wheel 30 Coupling part 31 Engine 32 Muffler 33 Transmission case 40 Front power case 41 Front leg 42 Rotary part 43 Scraper claw 44 Rotary cover 45 Side part 50 Rear power case 60 Crawler 61 Starting wheel 62 Front idler wheel 63 Rear idler wheel 64 Idler wheel support frame 65 Crawler belt 66 Rotating part 70 Front wheel for depth adjustment 71 Depth adjustment part 72 Hopping part 73 Flexible wire 74 Height adjustment lever 75 Front wheel support frame 76 Front wheel 77 Wire 78 Wire for side part 79 Side part adjustment lever 80 Handle 81 Safety bar S Operator

Claims

1. A walking-type two-unit rotary management machine, having a first management unit and a second management unit for performing management work, and a connecting part for connecting the first management unit and the second management unit, The first management unit and the second management unit each have a front wheel for depth adjustment, a rotary for scraping out soil, a drive unit for advancing the management machine, a front power case for transmitting power to the rotary, and a rear power case for transmitting power to the drive unit, The first management unit and the second management unit are arranged in parallel in the left-right direction and are connected to the connecting part at the upper ends of the front power case and the rear power case, An engine for generating power is arranged on the upper part of the first management unit, A handle for operating the rotary management machine is arranged on the second management unit, The connecting part has a transmission case for reducing speed and distributing power, The output of the engine is transmitted to the rotary from the front power case and to the drive unit from the rear power case via the transmission case, The front wheel for depth adjustment and the rotary for adjusting the scraping depth of the rotary are arranged at the lower end of the front power case, The drive unit is arranged at the lower end of the rear power case, The drive unit is a crawler, having front and rear idler wheels and a drive wheel at the upper part between the front and rear idler wheels, A rotary management machine, characterized in that during management work, the relative positions of the left and right rotaries and the left and right drive units are constant.

2. The left and right front power cases and the rear power case are fixed to the connecting part, and the front power case and the rear power case are fixed by side frames. The rotary management machine according to claim 1, characterized in that.

3. The distance from the axis of the drive wheel to the axis of the rear idler wheel is longer than the distance from the axis of the drive wheel to the axis of the front idler wheel. The rotary management machine according to claim 1, characterized in that.

4. The height of the axis of the drive wheel of the crawler is higher than the height of the rotation range of the rotary, The value of the ratio of the horizontal distance from the axis of the drive wheel to the front idler wheel to the vertical distance from the axis of the drive wheel to the idler wheel is within the range of 0.4 to 0.5, The value of the ratio of the horizontal distance from the axis of the drive wheel to the rear idler wheel to the vertical distance from the axis of the drive wheel to the idler wheel is within the range of 0.9 to 1.

1. The rotary management machine according to claim 3, characterized in that.

5. The front wheels for depth adjustment can be adjusted independently in height on the left and right, and a height difference of 5 cm or more can be set between one and the other. The height adjustment of the front wheels for depth adjustment can be adjusted by rotating an adjustment lever via a flexible wire. The rotary management machine according to claim 1, wherein the adjustment lever is in an adjustable position while the operator is performing the handle operation.

6. The rotary management machine according to claim 1, wherein one or both of the front wheels for depth adjustment can be bounced up.

7. The rotary management machine according to claim 1, wherein moving wheels are arranged at the rear end of the side frame.

8. The muffler of the engine is arranged on the side of the engine, and the exhaust from the muffler is discharged in the side direction. The rotary management machine according to claim 1, wherein the second management unit including the handle is on the side where the exhaust from the muffler does not reach as viewed from the first management unit.

9. Both the front power case and the rear power case are fixed to the connecting portion in a shape where the upper part is inclined backward and the lower part protrudes forward. The rotary management machine according to claim 1, characterized in that.

10. Above the rotary, there is a rotary cover, and there is a side part at the edge of the rotary cover. The side part can rotate around the edge, has a wire for rotating the side part, and the end of the wire is connected to a lever near the handle. The rotary management machine according to claim 1, characterized in that the side part can be rotated by operating the lever.

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