JPS6011947Y2 - Grooving device - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a trenching device for removing plowed soil left and right by a rotary or the like to open a trench used for drainage, for example.

For example, when cultivating rice fields, in order to improve the air permeability and water permeability of the tiller, a subsoiler is formed with a bullet-shaped trenching body 2 attached to the bottom of the blade 1 using a chevron 7 or the like. In this case, the tiller plows the soil near the opening of the vertical groove 4 formed by the passage of the blade 1 for the underdrain 3, as shown in the cross-sectional view in Fig. 1. is pushed up, creating an embankment 5, and because of this embankment 5, rainwater flows to a place away from the opening, and the vertical grooves 4 and culverts 3 that have been carefully formed create a sufficient drainage effect. I can't expect that.

Therefore, a rotary wheel is placed behind the blade 1, and while plowing with this rotary wheel, the soil is moved to the left and right by the earth removal plate installed behind it to form a water collection guide groove, and the nearby water is collected from the vertical groove 4. This is done so that they gather at the opening.

In this case, the mounting position of the earth removal plate must be adjusted up or down as necessary, but conventional earth removal plates are fixed to the rotary side frame with bolts, etc., and the installation position can be adjusted up or down. In order to do so, it must be reattached to another upper or lower mounting hole, which is troublesome and reduces work efficiency.

Therefore, this idea was developed by attaching the soil removal plate to the machine frame using parallel links that slope upward at the rear so that the soil removal plate is always pressed downward when moving forward, without having to adjust its mounting position up or down. This system is designed to ensure that all rotary soil is removed without fail.

An embodiment of this invention will be described below with reference to the attached drawings. As shown in FIG.
A mast 9 is supported by the mast 9, and the front part of a subsoiler frame 10 made of two plates is attached to the lower part of the mast 9, and a digging body 11 with a rear upward scooping surface is attached to the lower end of the blade body 1. Then, the bullet-shaped groove forming body 2 was attached to the blade body 1 at the rear of the trenching body 11 with a checker 712, and the middle part was pivotally connected to the subsoiler frame 10 with a horizontal fulcrum pin 13. The upper part of the blade 1 is attached to the rear part of the swing arm 14.

In addition, an input shaft 15 is pivotally supported on the subsoiler frame 10 by a bearing 16, and an eccentric portion 1 that is eccentric with respect to the axial center of the input shaft 15 is provided.
A spherical bushing 17 is fitted to 5a via a bearing, a spherical bushing 18 fitted to the front end of the swinging arm 14, and a swinging plate 19 fitted onto the spherical bushing 17 rotate the input shaft 15. The swinging arm 14 is formed to swing and vibrate up and down around the fulcrum pin 13 while moving up and down together with the spherical bushing 18 and sliding on the fitting surfaces of the spherical bushings 17 and 18, respectively.

On the other hand, a drive shaft 21 is pivotally supported by a gear box 20 attached to the subsoiler frame 10, and a drive pulley 22 attached to the drive shaft 21 is provided so as to be rotated by the input shaft 15 via a bevel gear mechanism inside the gear box 20. , drive shaft 2
The bearing body 25 of the grooving rotary 24 is attached to the rear part of the arm 23 which can move up and down around the bearing body 2.
Side frames 28.28 are attached to both ends of the stay 26 extending left and right from 5, and this side frame 28.28
The cultivating body 29 is pivotally supported by the plowing body 29, and a chino case 27 is provided on one side frame, and the rotary shaft 30, which pivotally supports the bearing body 25, is attached to the driven pulley 31.
A belt 3 is installed between the driven pulley 31 and the driving pulley 22.
2, the input shaft 15 is configured to rotate the tiller 29.

Then, the lower end of the adjusting screw 34 screwed into the pin 33 pivotally connected to the arm 23 is rotatably engaged with the rear end of the subsoiler frame 10, and when the adjusting screw 34 is rotated, the grooving rotary 24 along with the arm 23 The vertical movement position can be freely adjusted.

On the other hand, as shown in FIG. 4, for example, a soil removal plate 35 is formed which consists of a front plate 35a having a scooping surface at the bottom and side plates 35b, 35b on both sides thereof, and the side plates 35b, 35b and the side frame 28. 28, two equal length and parallel rods 35c on the left and right sides are connected to form a link mechanism such as parallel links 36 and 36, and a link mechanism such as the parallel link 36. A stopper 37.37 for restraining the downward rotation of the rod 35c is attached to the side frame 28.28, and the parallel link 36.
The groove-making device is formed in such a way that it can rotate only within a range where the groove is inclined backwardly upward.

Note that in the downward movement position where the parallel link 36.36 is in contact with the stopper 37.37, the soil removal plate 35 is moved so that the lower end of the scooping surface of the soil removal plate 35 is located below the lower surface of the tiller 29 of the rotary 24. form.

Since the trenching device of this invention is constructed as described above, when the input shaft 15 connected to the PTO shaft of the power agricultural machine via the universal joint shaft rotates, the eccentric portion 15a moves along with the swing plate 19. Since the swinging arm 14 is moved up and down, the blade body 1 swings and vibrates back and forth around the fulcrum pin 13, and at the same time, the input shaft 15 is moved through the belt 32 and the chino of the chino case 27 to drill a groove. The tiller 29 of the rotary 24 will be rotated.

Then, the blade body 1 and the digging body 1 vibrate slightly in the front and back direction.
1 and the trenching body 2 sufficiently crush the hardened plowing disk with little resistance to shape the vertical groove 4 and the underdrain 3, and the tilling body 29
The tiller is crushed, and the soil removal plate 35 opens the water collection guide groove 38 while removing the crushed soil left and right.

In this case, since the tilled soil plate 35 is connected to the side frames 28.28 by the parallel link 36 extending upward from the rear, as shown in the diagram for explaining the action of force shown in FIG. When receiving a reaction force F from , the tilled soil plate 35 receives a force Fb in the axial direction of the rods 35c at the upper connection point P of the parallel link 36, and also receives a force Fb at the lower connection point Q. Although the force Fa is also applied in the opposite direction, it is clear from the balance of the moments that it is Fa)Fb, and therefore, the vertical forces a1 and fb of these earth removal plates 35 are
The direction of l is reversed and is f, >fbl.

Therefore, the earth removal plate 35 moves in the direction of f,1, that is, downward f1□-
A force called fb is received, and a reaction force N equal to this force is received from the tiller to balance it.

In this way, the earth removal plate 35 is always subjected to a downward force when opening a trench, and therefore the tilling body 29 of the rotary 24 moves forward while contacting the bottom surface of the crushed tilled soil.

Therefore, for example, if the depth of tillage is changed by changing the angle of the side frame 28. However, according to this invention, the soil removal plate 35 always removes the cultivated soil crushed by the rotary 24 to the bottom surface to form a groove, so there is no need to change the mounting position of the soil removal plate 35. .

Note that since the soil removal plate 35 has a scooping surface, it normally receives a downward force from the tilled soil when moving forward, but the downward force in this case may be insufficient to press the soil removal plate against the bottom surface of the cultivated soil layer. , Also, a downward force does not always act.

However, since the above-mentioned horizontal force is always applied, it is possible to reliably press the soil removal plate 35 downward and remove the cultivated soil to the bottom of the cultivated soil layer.

Furthermore, with conventional soil removal plates that are fixed to the side frames with bolts, when the angle of the side frames is changed to change the tillage depth and the longitudinal angle of the tiller body is changed, the angle formed by the front surface of the soil removal plate also changes. However, in this invention, since the soil removal plate 35 is connected by a parallel link 36,
The position of the scoop remains constant and does not change, so it is possible to always remove cultivated soil with an appropriate scooping surface angle.

Note that this earth removal plate 35 is not necessarily connected to the side frame 28.
It is not necessary to attach the front plate 36 to the front plate 28, and it is possible to connect it to other machine frame parts as long as the parallel link 36 operates as described above.
The shape of 5a may also be such that the center tip is formed at an acute angle to facilitate removal of soil, and it goes without saying that it can be used by being attached to other agricultural machines other than rotary machines.

As explained above, according to the groove-cutting device of this invention, the soil removal plate is always subjected to downward force when moving forward from the rear of the rotary to remove tilled soil and open a trench. It advances almost in contact with the bottom of the tilled soil layer and can remove all the crushed tilled soil left and right by the rotary, so even when the inclination angle of the rotary in the front and back direction is changed, etc.
There is no need to perform operations such as adjusting the mounting position up or down, which prevents a decrease in work efficiency.Furthermore, since the soil removal plate always remains in the same position, its soil removal action can be performed appropriately. Moreover, it has various practical effects such as stable operation.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal cross-sectional view of a plowing ground crushed by a subsoiler, Fig. 2 is a partially cutaway side view of a power agricultural machine equipped with the furrowing device of this invention, and Fig. 3 is an outline of the A-A line in Fig. 2. FIG. 4 is an enlarged perspective view of the main part of the groove-making device, and FIG. 5 is an explanatory diagram of the action of the force applied to the earth removal plate. Description of symbols: 1...blade body, 2...grooving body, 3...culvert, 4...vertical groove, 5...
...Mountain part, 6...Power agricultural machinery, 7...
・Lower link, 9...Mast, 10...
... Subsoiler frame, 11 ... Hori Shin body, 1
2... Cheno, 13... Fulcrum pin, 1
4... Swing arm, 15... Input shaft,
15a...Eccentric part, 16...Bearing, 1
7.18... Spherical bush, 19...
Swing plate, 20...Gear box, 21.
... Drive shaft, 22 ... Drive pulley, 23
...Arm, 24...Rotary, 25
... Bearing body, 26 ... Stay, 27.
... Cheno case, 28 ... Side frame, 29 ... Cultivating body, 30 ... Rotary shaft, 31 ... Driven pulley, 32 ... ...
・Belt, 33...pin, 34...adjustment screw, 35...earth removal plate, 35a...
Front plate, 35b... Side plate, 35c... Rod, 36... Parallel link, 37... Stopper, 38... Water collection guide groove.

Claims (1)

[Scope of utility model registration request] A trench cutting device characterized in that a soil removal plate is pivotally connected to a machine frame via a link mechanism so as to be movable up and down, and the link mechanism is configured to be rotatable within a range inclined in an upward direction.