JP2002223608A - Rotary tillage device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve problems that the so-called dashing phenomenon in which a sudden load is applied to driven tillage tines and an inexpensive type mobile agricultural machine is pushed with rotary rotation and starts running when the lowering speed of the rotary is kept at a high value because the inexpensive type agricultural working machine is not equipped with a deceleration control mechanism. SOLUTION: This rotary tillage device is obtained by installing gauge wheels 3 protruding to the lower part of a rotary tillage tool 2 freely liftably and lowerably attached to the rear of the machine body of the mobile vehicle and bringing the gauge wheels 3 into contact with the ground surface beforehand when the rotary tillage tool 2 is lowered and making the gauge wheels 3 vertically movable relatively to the ground through dampers 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary tilling device, and more particularly, to a rotary tilling device for excavating a field surface with a tilling claw for rotary excavation and crushing soil. This is intended to prevent a sudden increase in load when descending to the ground side, or to easily clean around a rotary tilling tool after digging.

[0002]

2. Description of the Related Art A conventionally known technique for preventing a sudden increase in load when a rotary till is lowered to the ground side is generally called deceleration control (desceleration control). The height of the rotary tilling claw attached to the rear of the moving vehicle is measured with a sensor in high-end machines, and the rotary tilling device that descends at a predetermined speed while driving and rotating is just before the ground touches the ground. Slow down speed to lower the load acting on the tilling by contacting the ground with the ground, or lowering while reducing the drive speed when touching the ground, and set the drive speed to the set state when reaching the predetermined depth. There are automatic control types such as those that return the tiller to reduce the load acting on the tillage claw.

In order to easily clean the area around the rotary tilling after digging, the rear cover that covers the rear part of the tilling claw is lifted by hand, and is locked so as not to fall after lifting. The grass, straw and mud were removed.

[0004]

An automatic control system having a conventional decelera control mechanism requires various sensors and hydraulic control circuits on the main body of the moving vehicle, and is inexpensive. Cannot be the vehicle body.

[0005] Inexpensive mobile farming machines do not have a deceleration control mechanism. Therefore, if the rotary descending speed is kept high, a sudden load acts on the driven tilling claw, and the mobile farming machine becomes rotary. The so-called dashing phenomenon, which causes the so-called dashing phenomenon to start running due to the rotation, prevents the tillage work. The work was very laborious.

In order to solve this problem, in a low-cost mobile agricultural machine, the descending speed of the rotary tilling tool at the headland at the start of tilling is extremely slowed down, and the change in the amount of soil acting on the tilling nail is reduced. It prevents the scattering of soil and prevents a sudden load from acting on the tilling nails, thereby making it difficult to cause a dashing phenomenon. However, if the descending speed is too slow, the traveling distance of the moving vehicle will be longer and the range of the headland that will not be plowed will increase, or in order to prevent it, lower the rotary tiller with the moving vehicle stopped. Tilling shallowly first, and then running, it takes a lot of time to start tillage excavation work.

[0007] Further, in the case of cleaning around the rotary tilling tool after digging, if the excavated mud adheres to the rear cover and the rear cover becomes heavy, it is difficult for a woman or an elderly person to lift the rear cover by hand. Therefore, labor saving was desired.

[0008]

SUMMARY OF THE INVENTION The present invention is to solve such a problem of the conventional device, and has taken the following technical means. That is, the invention according to claim 1 is provided with a protruding gauge wheel 3 at a lower portion of a rotary tilling tool 2 which is attached to the body 1 of a moving vehicle so as to be able to move up and down. The rotary tilling device is characterized in that the gauge wheel 3 can be moved up and down with respect to the ground via a damper 4 while being brought into contact with the rotary tilling device.

According to a second aspect of the present invention, the damper 4 comprises an outer supporting cylinder 5 and an inner sliding shaft 6 which expands and contracts.
The rotary tilling apparatus according to claim 1, wherein the expansion and contraction speed of the sliding shaft (6) can be adjusted from outside. In the invention according to claim 3, the rotary tilling tool 2 includes a plurality of tilling claws 7, 7,. . And the upper and rear sides of the rotary tilling tool 2 are covered with a main cover 8 and a rear cover 9, and the rear cover 9 can be forcibly flipped up around a front fulcrum shaft 10. The device.

According to a fourth aspect of the present invention, a flip-up structure is provided.
The rotary tilling device according to claim 3, wherein the winding tool (12) is configured to wind the other end of the linear member (11) having one end attached to the rear cover (9).

[0011]

1 shows a rotary tilling device mounted on a rear portion of a moving vehicle, which is an agricultural tractor 13, so as to be able to move up and down. Front and rear wheels 14 and 15 are provided around the body 1 of the agricultural tractor 13, and an engine 16 is mounted above the body 1 between the left and right front wheels 14 and 14. And a front grill 18 and a side cover 19. A steering handle 20 is provided behind the hood 17, and the seat 2 is disposed above the right and left rear wheels 15.
The agricultural tractor 13 is driven and driven by the driver sitting on the vehicle 1. The driving force of the engine 16 is transmitted to the rear wheels 15, 15 and the front wheels 14, 14 via a main clutch (not shown) and transmission gears of each part.
Travels forward or backward.

One end of a three-point link device comprising a top link 22 and left and right lower links 23, 23 is attached to a rear portion of a transmission case 24 also serving as a machine frame located at a rear portion of the machine body 1. At the other end of the link device, the end of the mast 25 of the rotary tiller 2 and the left and right support frames 26,
26 parts are pivotally mounted by mounting pins.

Reference numeral 27 denotes a lift arm, which is mounted to be rotatable up and down around a shaft 29 at the rear of a hydraulic cylinder case 28 mounted on the upper part of the transmission case 24.
The actuator is converted into an up-and-down rotation amount by an expansion / contraction operation of an actuator (not shown) inside the case, and is operated. The protruding tip end of the lift arm 27 and the middle part in the front-rear direction of the lower link 23 are connected by a lift rod 30.
Goes up and down.

The illustrated rotary tilling tool 2 is a side-drive type rotary cultivator. The rotary tilling tool 2 receives the driving force of the engine 16 input to a central transmission case 31 provided at the upper center in the left-right direction.
It is transmitted to a side transmission case 32 at one end via a bevel gear, a transmission shaft, and the like (not shown). A left connect pipe 33 connects the left outer portion of the central transmission case 31 and the inner upper portion of the side transmission case 32, and a right connect pipe 34 connects the right outer portion of the central transmission case 31 and the inner upper portion of the side plate 35. It is connected. By the left and right connect pipes 33 and 34, the upper part of the rotary tilling tool 2 is rigidly connected on the left and right sides, and the left and right ends of the lower tilling pipe 36 are freely rotatably supported by the drive shaft.
2 and the side plate 35 to form a strength member for the upper, lower, left and right sides of the rotary.

The support frames 26, 26 described above are integrally attached to the inner sides of the left and right connect pipes 33, 34 by welding or the like, as shown in the figure. A plurality of tilling claws 7, 7,... Are provided on an outer periphery of a tilling pipe 36 attached to a lower portion between the side transmission case 32 and the side plate 35. . . Are spirally attached at a predetermined pitch over the entire width, and the driving rotation of the tilling pipe 36 excavates and crushes the soil surface.

Tilling claws 7,7. . . The upper portion of the rotation trajectory is covered with a main cover 8, and a rear cover 9 is attached to the rear end of the main cover 8 so as to be vertically swingable about a fulcrum shaft 10. The rear cover 9 is a leveling plate that hangs down by its own weight to level the surface of the excavated mud, but the pressing force can be increased or decreased by using a configuration described below.

Reference numeral 37 denotes a push-pull rod whose lower end is pivotally mounted on the rear cover 9 and whose middle in the vertical direction is slidably attached to a stay 38 projecting from the main cover 8 side. The vertical position or the pressing force of the rear cover 9 is changed by adjusting the positions of the upper and lower pressing springs 39 and 40 located above and below the stay 38. That is, when the push-pull rod 37 is adjusted to be pulled up with respect to the stay 38 by using the upper pressing spring 39, the pressing force of the rear cover 9 is reduced, and the lower pressing spring 40 is moved upward to be fixed and fixed to the push-pull rod 37. When a downward load is applied, the pressing force can be increased. Reference numeral 60 denotes a locking member, which is an upper and lower pressing spring 3.
9 and 40 are for adjusting the axial holding position. As described above, the rear cover 9 can be adjusted only when its own weight is required, when the pressing force is reduced, and when the pressing force is increased.

As shown in FIG. 2, the rear end of the support frame 26 protrudes rearward from the connect pipes 33, 34 in side view, and the front ends of the rear hitch bars 41, 41 are moved to the protruding ends. They are attached with pins 42, 42, respectively.
The rear hitch bar 41 is provided between the mast 25 and the screw cylinder 44.
The handle 43 at the upper end is rotated and the pin 42
Adjust the vertical position with the axis as the axis. A left and right toolbar 45 is attached to the rear end of the rear hitch bar 41 which can be extended and retracted in the front and rear directions.
The upper portions of the mounting shafts 46 of the gauge wheels 3 and 3 are mounted to the upper and lower portions 7 and 47 so that the upper and lower stages can be adjusted by changing a pin shaft or the like.

The mounting shaft 46 is a hollow round pipe,
The gauge wheel 3 attached to the lower end is attached via a damper 4 so as to be vertically movable. In the illustrated example, the gauge wheel 3 is configured such that the arm 49 swings up and down about the shaft 48, but may be a gauge wheel mounted as a damper 4 that expands and contracts directly in the axial direction of the mounting shaft 46.

The height of the gauge wheel 3 is adjusted so as to protrude below the tilling claw 7 of the rotary tilling tool 2, as shown in FIG. The agricultural tractor 13 travels forward. When the descent speed is lowered at a predetermined high speed, the gauge wheel 3 first strongly contacts the soil surface. The weight of the rotary tiller 2 is applied to the gauge wheel 3 and the arm 49 of the gauge wheel 3 is
Move around the center. At this time, the arm 49 and the mounting shaft 4
The damper 4 disposed between the six works and the gauge wheel 3 shrinks slowly, and the tilling claw 7 of the rotary tilling tool slowly descends from the soil surface to a deep position to balance the support load of the damper 4. The rotary tiller 2 descends to this point.

As described above, even if the rotary tilling tool 2 is rapidly lowered, after the gauge wheel 3 touches the ground, the tilling excavation is performed with the lowering speed gently limited by the damper 4.
Driving tine 7,7. . . The agricultural tractor 13 does not have a sudden load on the tilling claws 7, 7,. .
The so-called "dashing phenomenon" in which the vehicle is pushed by the rotational resistance during excavation and runs is less likely to occur.

Then, the tilling claws 7, 7,. . As a result, the amount of change in soil excavation depth is small, so that the soil mass at the start of excavation does not become large, so that the scattering of the soil to a distant place can be prevented, unevenness hardly occurs on the headland portion, and leveling work is easy. Also, even if the rotary tiller 2 descends quickly, if the gage wheel 3 is projected downward, the damper 4 shrinks after the gage wheel 3 comes into contact with the ground, so that the descent speed of the rotary tiller 2 is automatically reduced slowly. Because
The operation can be roughly performed without much concern for the descending speed of the rotary tiller 2, and the operation itself becomes easy.

FIG. 4 shows a damper 4 capable of adjusting the expansion / contraction speed, which is an invention relating to claim 2 and will be described below. The damper 4 is composed of a support cylinder 5 and a sliding shaft 6, and mounting holes 5a and 6a are provided at both protruding ends. The inner end side of the sliding shaft 6 is inserted into the supporting cylinder 5, and the sliding shaft 5, whose inner end side is pressed by the high-pressure gas sealed in the supporting cylinder 5, moves between the mounting holes 5 a and 6 a when there is no load. Extend so as to make the interval of the longest. When a load acts on both ends of the damper 4, the tip of the sliding shaft 6 pressed by the high-pressure gas sealed in the support cylinder 5 is reduced in length to a balanced position and stabilized.

The configuration shown in the figure is for adjusting the speed of the expansion / contraction speed, and does not change the final distance between the mounting holes 5a and 6a. That is, a brake device 50 is provided on the other end side of the support cylinder 5 provided with the mounting hole 5a at one end, and the expansion / contraction speed of the sliding shaft 6 is changed by adjusting the brake from outside. The specific configuration is such that the two-parted truncated cone-shaped brake shoes 50a, 50a are screwed on the other end side of the support cylinder 5 through a corresponding nut 50b having a tapered surface on the inner periphery.
The nut 50b is moved in the axial direction along the axis to adjust the braking force of the brake shoe 50a. When the brake is strengthened, the sliding shaft 6 changes its entire length slowly due to the load change and stops at the equilibrium position. When the brake is weakened, the sliding shaft 6 changes its entire length rapidly due to the load change and stops at the balancing position. . The expansion and contraction speed can be changed slowly according to the operator's feeling, and a satisfactory operation speed can be taken out from a novice practitioner to an expert to improve workability.

This damper 4 can be folded into the device for vertically moving the gauge wheel 3 of the rotary tilling tool 2 of the first aspect, or can be used for any purpose such as simply folding it into a damper part such as an opening / closing door. Good thing. Next, FIG. 5 will be described. This shows the invention related to claim 3, and the tilling claws 7, 7,. . The rear end of the rear cover 9 that covers the rear of the vehicle is easily pulled up toward the mast 25 around the front fulcrum shaft 10.

For this purpose, the winding device 12 composed of an electric winch or a manual winch is attached to the rear wall of the central transmission case 31. The winding device 12 is provided with a linear member 11 which is a linear rope such as cotton or wire and a drum 5 for winding.
The hook 54 attached to the distal end of the linear member 11 is engaged with an annular portion 53 provided on the rear portion of the rear cover 9 so that the operator can pull up the rear cover 9 with a light force. That is, if it is an electric or mechanically driven winch, the operation of the linear member 11 can be extended and retracted by operating a switch or lever (not shown). It can be lifted and held as shown by the solid line in FIG.

With this configuration, when cleaning around the rotary tilling tool 2 after digging is performed, the rear cover 9
Even if the excavation mud adheres to the rear cover 9 is heavy,
Since the rear cover 9 can be lifted by hand and fixed by a woman or an old man, the tillage claws 7, 7,. . It is easy to wash or clean the area from behind.

FIG. 6 shows an inexpensive rear cover 9.
The lifting device 51 will be described below. A front locking portion 55 is provided below the transmission case 24 at the rear of the body 1, a rear support arm 56 is provided above and behind the central transmission case 31, and a roll 57 is rotatably mounted on a protruding tip of the rear support arm 56. I have. Then, as the rotary tilling implement 2 lowered to the ground side, the front end of the linear member 11a, which is a linear rope such as cotton or wire, is attached to the front locking portion 55 of the transmission case 24 of the agricultural tractor 13. The intermediate part of the member 11 is wrapped around a roll 57 at the front end of the rear support arm 56 and the hook 54 at the rear end is connected to the annular part 5 of the rear cover 9.
Lock to 3. When this rotary tilling tool 2 is lifted via a three-point link device, the hook 54 of the linear member 11a, which is a linear rope such as cotton or wire, moves forward as shown in the figure, and the rear end of the rear cover 9 is moved. It can be raised around the fulcrum shaft 10 and easily pulled up to the mast 25 side.

FIG. 7 shows still another rear cover 9 lifting device, which is different from the above-described embodiment. A hook arm 58 projects upward from the rear end of the rear cover 9, and the rear hitch bar 41 is attached to the hook arm 58.
Attach the lower end of the screw cylinder 44 to operate. And
By operating the upper handle 43, the rear end of the rear cover 9 can be raised around the fulcrum shaft 10 and easily pulled up to the mast 25 side as indicated by a virtual line.

[0030]

According to the present invention, a gauge wheel 3 is provided at the lower part of a rotary tilling tool 2 which is attached to the rear of the body 1 of a moving vehicle so as to be able to move up and down, and the rotary tilling tool 2 is lowered. Sometimes, the gage wheel 3 is brought into contact with the ground first, and the gage wheel 3 can be moved up and down with respect to the ground via the damper 4. Even if it is suddenly lowered, the tilling load does not suddenly act on the tilling claw due to the expansion and contraction action of the damper 4, so that no dashing occurs and the driving operation is easy. In addition, since the tilling nails slowly descend into the soil, the excavated soil does not become large and there are few irregularities, so that the leveling work on the headland can be easily performed.

According to a second aspect of the present invention, the damper 4 comprises an outer supporting cylinder 5 and an inner sliding shaft 6 which expands and contracts.
Since the rotary tilling device is characterized in that the expansion and contraction speed of the sliding shaft 6 can be adjusted from the outside, the tilling work can be performed at a descent speed suitable for the work ability of the driver, and the user can concentrate on the work without any discomfort.

According to the third aspect of the present invention, there is provided a rotary tiller
A plurality of tilling claws 7,7. . And the upper and rear sides of the rotary tilling tool 2 are covered with a main cover 8 and a rear cover 9, and the rear cover 9 can be forcibly flipped up around a front fulcrum shaft 10. Since the apparatus is used, cleaning around the rotary tiller 2 can be easily performed.

According to a fourth aspect of the present invention, the flip-up structure includes
The rotary tilling device is characterized in that it is a winding tool 12 that winds the other end of the linear member 11 having one end attached to the rear cover 9 so that the rear cover 9 can be rotated around the front fulcrum shaft 10 with a light force. This made it easy for even elderly women to work.

[Brief description of the drawings]

FIG. 1 is a side view of a rotary tillage device.

FIG. 2 is a perspective view of a rotary tillage device.

FIG. 3 is an overall side view in which a rotary tilling device is attached to a moving vehicle.

FIG. 4 is a sectional view of a main part damper device.

FIG. 5 is a side view of another example of the rotary tillage device.

FIG. 6 is a side view of another example of the rotary tillage device.

FIG. 7 is a side view of a rotary tillage device of another example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Body 2 Rotary tillage tool 3 Gauge wheel 4 Damper 5 Support cylinder 6 Sliding shaft 7 Tilling claw 8 Main cover 9 Rear cover 10 Support shaft 11 Linear member 12 Winding tool

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2B033 AA05 AB01 AB11 AC05 DB39 ED01 ED15 2B041 AA11 AB05 AC03 CA03 CA16 CG07 DA04 DB02 DC04 DC20 HA25

Claims (4)

[Claims] 1. A protruding gauge wheel 3 is provided at a lower portion of a rotary tilling tool 2 attached to the rear of a body 1 of a moving vehicle so as to be able to move up and down. A rotary tilling device, wherein the gauge wheel 3 is vertically movable with respect to the ground via a damper 4. 2. The damper 4 comprises an outer support cylinder 5 and an inner sliding shaft 6 which can be extended and contracted, and the speed of extension and contraction of the sliding shaft 6 can be adjusted from outside. Rotary tilling equipment. 3. A rotary tilling tool 2 comprising a plurality of tilling claws 7,
7. . The main cover 8 and the rear cover 9 cover the upper part and the rear part of the rotary till 2 with the rear cover 9.
A rotary tilling device characterized in that it can be forcibly lifted up around a fulcrum shaft 10 at the front part. 4. The rotary tilling apparatus according to claim 3, wherein the flip-up structure is a winding tool 12 that winds the other end of the linear member 11 having one end attached to the rear cover 9.