CN113508655A

CN113508655A - Ploughing device with harrow

Info

Publication number: CN113508655A
Application number: CN202110308413.6A
Authority: CN
Inventors: 朴基赫
Original assignee: Pu Jihe
Current assignee: Pu Jihe
Priority date: 2020-03-24
Filing date: 2021-03-23
Publication date: 2021-10-19
Anticipated expiration: 2041-03-23
Also published as: JP7142381B2; KR102196065B1; JP2021151227A; CN113508655B

Abstract

The invention relates to a plough device with climbing plough, in particular to a plough device which is arranged in a plough device for ploughing by the traction force of a tractor and is used for crushing the ploughed land and leveling the ploughed land uniformly. To achieve the above object, a harrow-carrying plough device according to the present invention comprises: a frame having a tractor attachment portion at a front portion thereof to be towed by a tractor; a front plow section provided with a plurality of plowers in a width direction at a front portion of the frame; a rear plow section provided with a plurality of plowers in a width direction at a rear portion of the frame; a front rake fixed to the frame between the front and rear plowing sections and rotating to break soil plowed by the plowing sections; a rear rake fixed to the frame at a rear of the tilling portion and rotating to break soil plowed by the tilling portion.

Description

Ploughing device with harrow

Technical Field

The present invention relates to a plough with a creeping plow, and more particularly to a plough with a creeping plow which is mounted in a plough device for ploughing by a tractor and which crushes and flattens the ploughed soil uniformly.

Background

In the present invention, the conventional technique and the technique of the present invention are described by taking a plow, which is generally used in a cultivator, as an example, but not limited to a plow.

In general, a plow is used to make a ridge for planting crops by plowing and turning using livestock such as cattle and horses or machinery.

As an example of the conventional tractor-ploughing device, as shown in korean utility model No. 20-0200074 (an improved ploughing plow for a tractor) registered by the present applicant, the structure is such that a support body is composed of a front frame on which a plurality of front ploughing portions are provided and a rear frame on which a plurality of rear ploughing portions are provided.

Plowing is performed by the plowing device of such a structure, and a harrow is used to break clods generated during plowing.

In korean registered patent No. 10-1053758 (harrow hiller with ploughshare), a plurality of rotatable ripping blades fastened to a driving part of a tractor through gears to receive power to rotate in a horizontal direction to finely break clods are vertically formed at a lower side of a main body at certain intervals.

However, the conventional harrow has a gear fastening structure for transmitting power to a plurality of ripping blades, so the structure is very complicated, and manufacturing costs are increased due to its complexity.

In addition, such a rake can finely crush clods of soil, but cannot level the crushed soil, and byproducts such as straw and roots, etc., which are turned over when plowing, are exposed on the ground and need to be separately removed, so that the work efficiency is greatly reduced.

Documents of the prior art

(patent document 1) korean registered utility model No. 20-0200074

(improved plow for tractor)

(patent document 2) Korean registered invention patent No. 10-1053758

(Rake banking machine with plowshare)

Disclosure of Invention

Technical problem to be solved by the invention

In order to solve such conventional problems, an object of the present invention is to provide a harrow-type plough device capable of crushing clods of soil plowed by a cultivator and pressing turned-out by-products onto the ground while leveling the crushed soil.

Means for solving the problems

In order to achieve the above object, a harrow-carrying plough device according to a first embodiment of the present invention comprises:

a frame having a tractor attachment portion at a front portion thereof to be towed by a tractor;

a front plow section provided with a plurality of plowers in a width direction at a front portion of the frame;

a rear plow section provided with a plurality of plowers in a width direction at a rear portion of the frame;

a front rake fixed to the frame between the front and rear plows and rotating to break soil plowed by the plows.

The harrow mounted plow apparatus further comprises:

a pair of front support arms, one side of which is rotatably installed at both sides of the frame, and the other side of which is installed at the outer side of the front rake through a rotating shaft;

and a plow depth adjusting part fixed to the frame and fixing a vertical rotation angle of the front support arm to adjust a plow depth of the plow.

And, the front rake includes:

a pair of rotation plates installed to rotate at the other side of the pair of front support arms, respectively;

a plurality of connecting rods having a rod shape, both ends of each of which are fixed along the outer peripheries of the pair of rotating plates at a predetermined distance, respectively, so as to connect the pair of rotating plates;

a front support part which is ring-shaped or disc-shaped, is inserted into the inside or outside of the plurality of tie rods, and supports the tie rods fixed to the outside or inside periphery thereof so as not to be bent, the support part being provided in plurality at certain intervals.

Further, the plow depth adjusting unit includes:

a support piece provided in an axial direction of the frame and having a plurality of pin holes formed in an up-down direction,

a fixing pin inserted into the pin hole of the support piece to fix the upward and downward movement of the support arm.

And, further comprising crushing blades installed at regular intervals along the periphery of the support portion and provided to protrude in an outside direction of the support portion, the crushing blades being detachable from the support portion, fixing holes being formed in the support portion, the crushing blades being fastened to the fixing holes by bolts.

Further, a harrow-equipped plow apparatus according to a second embodiment of the present invention is characterized by comprising:

a plow section provided with a plurality of plowers in a width direction at a front portion of the frame;

a rear rake fixed to the frame rearward of the tilling portion and rotating to break soil plowed by the tilling portion.

And, the rear rake includes:

a support frame elongated in a width direction of the frame;

a rear support arm connecting the frame and the support frame;

a pair of rotation plates installed to rotate in a drawing direction of the frame at both ends of the support frame, respectively;

a support part having a ring shape or a disk shape, inserted into the inner or outer side of the plurality of tie bars, and supporting the tie bars fixed to the outer or inner periphery thereof so as not to be bent, the support part being provided in plurality at certain intervals.

Further, a harrow-equipped plow apparatus according to a third embodiment of the present invention is characterized by comprising:

a front rake fixed to the frame between the front and rear plowing sections and rotating to break soil plowed by the plowing sections;

And, sprockets or pulleys are provided on the rotation shafts of the front rake and the rear rake, respectively, and a chain or a belt is connected between the sprockets or the pulleys to transmit a rotational force.

And, a hydraulic motor is installed on the rotation shaft of the front rake and the rear rake to apply a rotation force.

ADVANTAGEOUS EFFECTS OF INVENTION

According to the present invention configured as described above, the front rake is mounted between the front plow section and the rear plow section mounted on the frame, and the soil plowed from the front plow section is crushed for the first time, thereby solving the problem that the soil plowed by the front plow section is accumulated between the rear plow sections.

In addition, the plowing depth of the front plowing part can be adjusted by adjusting the height of the front harrow, thereby improving the plowing efficiency.

Further, by the plurality of rotating link rods and crushing blades fixed at both ends to the pair of rotating plates, the ground is leveled by the rotation of the link rods while finely crushing the plowed clods, and the by-products such as straw or roots are buried in the ground, so that it is not necessary to provide a separate working machine for leveling the ground.

Therefore, since plowing, crushing and leveling work can be simultaneously performed, not only workability is excellent, but also a structure is very simple and a separate working machine is not required, so that cost reduction effects can be simultaneously obtained.

Drawings

Fig. 1 is a structural view showing a harrow-carrying plow apparatus according to the present invention.

Fig. 2 is a structural view showing a rake applied to the present invention.

Fig. 3 is a structural view showing that the crushing blade is attached to the support portion.

Fig. 4 is an operation diagram for explaining the adjustment of the tilling depth of the front tilling section by the tilling depth adjusting section.

Fig. 5 is an operation diagram for explaining the demarcation of the tilling edge of the tilling land by the front rake.

Fig. 6 is a structural view showing that the front rake and the rear rake are connected by a chain or a belt to transmit a rotational force.

Fig. 7 is a structural view showing that hydraulic motors are installed in the front rake and the rear rake to apply a rotational force.

Fig. 8 and 9 are structural views showing another form of applying a rotational force to the rake.

Fig. 10-13 are photographs of the invention applying power to the rake.

Detailed Description

The above objects, features and advantages will be described in detail later with reference to the accompanying drawings, whereby the technical idea of the present invention can be easily implemented by those skilled in the art to which the present invention pertains.

In describing the present invention, if it is considered that detailed description of known technology related to the present invention may unnecessarily obscure the subject matter of the present invention, the detailed description will be omitted.

Terms used in the present invention are selected from general terms that may be widely used at present in consideration of functions of the present invention, but may be varied according to intentions or cases of those skilled in the art, the emergence of new technology, and the like.

In addition, there are also terms that the applicant has arbitrarily selected in a specific case, and in this case, the meanings of these terms will be described in detail in the description of the corresponding invention.

Therefore, the terms used in the present invention should be defined based on the meanings of the terms and the overall contents of the present invention, not by the names of the simple terms.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

However, the embodiments of the present invention illustrated below may be modified in various forms, and the scope of the present invention is not limited to the embodiments described below.

Embodiments of the present invention are provided to more fully describe the present invention to those of ordinary skill in the art.

The first embodiment of the present invention is mainly composed of a frame 100, a front plow 130, a rear plow 140 and a rear rake 200.

Here, the front and

rear plow sections

130 and 140 are shown by way of example as a plow, which is one type of plow, and may have a form in which only the rear plow section 140 is provided in the frame 100.

The frame 100 is connected to the rear of the tractor and towed, three-point

tractor connection portions

110 and 120 are provided in the up-down direction in front of the frame 100, a front plow portion 130 is mounted on the front of the frame 100, the front plow portion 130 is spaced apart by a plurality of plows and fixed in the width direction of the frame 100, and a rear plow portion 140 is similarly mounted on the rear of the frame 100, the rear plow portion 140 is spaced apart by a plurality of plows and fixed in the width direction of the frame 100.

Of these front and

rear plows

130 and 140, only one plowing (130 or 140) may be mounted on the frame 100, or both plowing 130 and 140 may be mounted in front and rear of the frame 100, respectively.

A rear rake 200 is provided at the rear of the rear plow part 140, one side of the rear rake 200 being rotatably mounted on the frame 100 by a hinge 171, and the other side being configured to be rotated in the up-down direction by a cylinder 170 so as to be able to be raised from or lowered to the ground, the cylinder 170 being rotatably mounted on a support frame 210 by a hinge part 220.

In addition, a pair of

rear support arms

150 and 160 are provided at both sides of the cylinder 170 so that the rear rake 200 is stably supported by the frame 100 and can be rotated in the up-down direction by the cylinder 170, one side of the

rear support arms

150 and 160 is mounted on the frame 100 to be rotatable in the up-down direction, and the other side is fixed to the rear rake 200.

As shown in fig. 2, the rear rake 200 is constructed like a barrel rotated and rolled in a towing direction of the tractor by a pair of

rear support arms

150 and 160, an elongated support frame 210 is provided in a width direction of the frame 100, the other side of the air cylinder 170 is installed at the center of the support frame 210, and the other sides of the

rear support arms

150 and 160 are fixed to both sides thereof.

Both ends of the support frame 210 extend downward, and at the extended portions, disk-shaped

rotation plates

230 and 240 are installed by

rotation shafts

231 and 241, respectively, to rotate in a traction direction of a tractor, and a plurality of connection rods 250 are located between the pair of

rotation plates

230 and 240 to connect the

rotation plates

230 and 240 to each other.

That is, both ends of a plurality of rod-shaped connecting rods 250 are fixed along the outer circumferences of the

rotating plates

230 and 240 at intervals to connect the connecting

rotating plates

230 and 240 spaced apart from each other at both ends of the support frame 210 to each other, so that rolling motion can be performed by the traction of a tractor.

At this time, it is preferable that both ends of the plurality of connecting rods 250 are not horizontally fixed at the same position of the

rotating plates

230 and 240, but are connected to be slightly inclined downward when directed from one side to the other side.

This is to efficiently break the clods of soil plowed by the front plowing part 130 and the rear plowing part 140 and to efficiently bury by-products such as straws and roots into the ground.

That is, one connecting rod 250 is continuously contacted with the ground from side to side with a time interval, thereby enabling the crushing operation while minimizing resistance of soil blocks or byproducts.

In addition, since the connection rods 250 have a long rod shape, they may be bent due to resistance such as soil or roots, and a plurality of support parts 260 are provided at regular intervals in order to prevent bending while stably maintaining the intervals of the plurality of connection rods 250.

The support portion 260 is ring-shaped, and may be inserted into the inside of the plurality of connection rods 250 such that the connection rods 250 are fixed to the outside of the support portion 260, or the connection rods 250 may be inserted into the inside of the support portion 260 such that the connection rods 250 are fixed to the inside of the support portion 260.

In the drawings, although a structure in which the ring-shaped support part 260 is inserted inside the connection rod 250 so that the plurality of connection rods 250 are fixed to the outside of the support part 260 is illustrated, the support part 260 may have a circular disk shape, and when inserted outside the connection rod 250, the support part 260 has a ring shape.

As shown in fig. 3, the support portion 260 has a circular ring shape, and connection rod fitting grooves 261 are formed at regular intervals on the outer side of the support portion 260, the connection rod fitting grooves 261 are used for inserting and fixing the connection rods 250 so that the connection rods 250 are in contact with and fixed to the outer side of the support portion 260, and the connection rods 250 are inserted into the connection rod fitting grooves 261 and then fixed by welding or the like.

Of course, the supporting portion 260 may have a disk shape as described above.

In addition, crushing blades 270 are fixed to the supporting part 260 at certain intervals, and the crushing blades 270 are detachably fixed and installed between the connecting rod fitting grooves 261 and installed to protrude in an outer direction of the supporting part 260.

Thus, the crushing blade 270 is fixedly installed at a position where it is not interfered with by the connecting rods 250, i.e., protrudes outward through the interval between the connecting rods 250, and thus can crush the soil mass plowed by the plowing

parts

130 and 140.

That is, although the soil blocks may be crushed by the rotation of the connection rod 250, the soil blocks are more finely crushed by the crushing blades 270, so that the leveling work may be more effectively performed.

Fixing holes 262 for mounting and dismounting the crushing blade 270 are formed between each connecting rod fitting groove 261, and bolt holes 271 are formed at the lower portion of the crushing blade 270, so that it is possible to have a structure in which bolts 272 are inserted through the bolt holes 271 and the fixing holes 262 and fastened by nuts 273.

Of course, the detachable structure of the crushing blade 270 may be implemented in various ways, and the structure of the crushing blade 270 may also have various shapes for crushing the soil block.

The operation state according to the first embodiment of the present invention will be described.

During travel, the cylinder 170 is compressed so that the rear rake 200 can travel in a raised condition, and at the plow job site, the cylinder 170 is extended to lower the rear rake 200 into contact with the ground.

At this time, when the cylinder 170 is further extended in a state where the rear rake 200 is in contact with the ground, the rear rake 200 is supported on the ground and the rear portion of the frame 100 is lifted, and therefore, the front plow part 130 and the rear plow part 140 are also lifted, and the plowing depth, that is, the plow depth becomes shallow.

In contrast, when the cylinder 170 is extended in a state where the rear rake 200 is close to the ground, the frame 100, the front plow part 130, and the rear plow part 140 dig deeper into the ground by their own weights in a state where the rear rake 200 is not supported on the ground, and the plow depth becomes deeper.

Of course, when the front and

rear plow portions

130 and 140 dig into the ground and the frame 100 is lowered, the rear rake 200 naturally contacts the ground and is supported without extending the cylinder 170, by which the plow depth is fixed in position.

As a result, the height of the rear rake 200 is adjusted according to the extension length of the cylinder 170, and the tilling depths of the front tilling part 130 and the rear tilling part 140 can be adjusted.

Thereafter, when the tractor advances and pulls the frame 100, the front and

rear plowing parts

130 and 140 excavate the ground according to the set plowing depth to plow the ground, and the rear harrow 200 rolls in the pulling direction by the pulling force, and the connecting rod 250 and the crushing blade 270 finely crush the clods plowed by the plowing

parts

130 and 140 to perform the leveling work.

In addition, by-products such as straw and roots are buried in the ground by the rotation of the connecting rods 250.

Therefore, the land leveling work is very easily performed by the rotation of the connection rod 250.

In the second embodiment of the present invention, a front rake 300 is provided between the front plow part 130 and the rear plow part 140, and the structure of the front rake 300 is the same as that of the rear rake 200 of the first embodiment of the present invention.

However, with a different support structure, the front rake 300 is supported by the frame 100 by the tilling depth adjusting parts 310 and 310', and the height of the front rake 300 is adjusted by the tilling depth adjusting parts 310 and 310', so that the tilling depths of the front and rear tilling

parts

130 and 140 can be adjusted.

That is, the rear portion of the frame 100 is rotated in the vertical direction about the three-point

tractor connection portions

110 and 120 connected to the tractor as an axis to adjust the depths of the front and

rear plow portions

130 and 140, but when the plow depth of the rear plow portion 140 is adjusted, the plow depth of the front plow portion 130 is set to be shallower than the plow depth of the rear plow portion 140, and therefore the plow depth of the front plow portion 130 cannot be adjusted to a desired plow depth.

Thus, by adjusting the height of the front rake 300, the height of the front portion of the frame 100 is adjusted to adjust the tilling depth of the front tilling portion 130.

For this, the front rake 300 is fixed to the front of the frame 100 by the plow depth adjusting parts 310 and 310', and the extension frames 101 and 101' are further extended outward from both sides of the front of the frame 100. These extension frames 101 and 101' are provided to protrude further outward than the front cultivating portion 130.

Each of the extension frames 101 and 101' is provided with the tilling depth adjusting parts 310 and 310', and since both sides of the tilling depth adjusting parts 310 and 310' have the same shape, the structure thereof will be described centering on one tilling depth adjusting part 310.

In the tilling depth adjusting part 310, a pair of

support pieces

311 and 312 are fixed to the rear of the extension frame 101 at a distance from each other, and a plurality of pin holes 313 and 314 are formed at the same positions of the

support pieces

311 and 312.

These pin holes 313 and 314 are formed in the up-down direction, and preferably, are formed to follow the rotation path of the front support arm 320.

The rear portion of the front support arm 320 is bent obliquely downward such that the rear portion of the support arm 320 faces the front rake 300, and the front portion of the support arm 320 is installed to be rotated in the up-down direction between the pair of

support pieces

311 and 312 by the shaft portion 315.

In addition, fixing

pins

316 and 317 are inserted into the pin holes 313 and 314 to fix the rotation of the front support arm 320 in the upper and lower side directions, and two fixing

pins

316 and 317 are respectively inserted into the pin holes 313 and 314 at the upper and lower sides of the front support arm 320, so that the front support arm 320 is caught by the fixing

pins

316 and 317 and fixed not to rotate.

That is, the fixing pins 316 and 317 serve as stoppers for preventing the rotation of the front support arm 320.

A plurality of these pin holes 313 and 314 are formed within the range of the maximum rotation angle of the front support arm 320, and when the front support arm 320 is rotated maximally upward, the height of the lower end portions of the uppermost pin holes 313 and 314 is the same as the height of the upper end portion of the front support arm 320, and similarly, when the front support arm 320 is rotated maximally downward, the height of the upper end portions of the lowermost pin holes 313 and 314 should be the same as the height of the lower end portion of the front support arm 320.

In addition, the spacing between the respective pin holes 313 and 314 corresponds to the thickness of the front support arm 320.

Both sides of the front rake 300 are rotatably mounted to the front support arm 320 by a rotation shaft 321.

Therefore, as shown in fig. 4, when the front support arm 320 is fixed by adjusting the inclination angle by the pin holes 313 and 314 and the fixing pins 316 and 317, the front rake 300 is grounded to the ground G to be supported, and the elevation degree of the frame 100 is adjusted by the ground supporting force, thereby finally adjusting the depth of the front plow part 130 dug into the ground, i.e., the plow depth.

That is, if the tilling depth is to be made shallow, the distance between the frame 100 and the ground surface G is increased by raising the angle of inclination of the front support arm 320 to push the front rake 300 up against the frame 100, and the tilling depth of the front tilling portion 130 is adjusted to be shallow, whereas if the tilling depth is to be made deep, the angle of the front support arm 320 is made gentle to decrease the distance between the frame 100 and the ground surface G, and the front tilling portion 130 is adjusted to dig deep into the ground.

As another form of such a plow depth adjusting part 310, there may be a structure in which pin holes are formed on the front support arm 320, and a fixing pin passes through the pin holes 313 and 314 and the pin holes formed in the front support arm 320 and is fixed to fix the rotation of the front support arm 320.

Further, the front rake 300 is positioned between the front plough part 130 and the rear plough part 140 to crush and transmit the soil plowed by the front plough part 130 to the rear, and in the case of a plough machine having only the front plough part 130 and the rear plough part 140 without the front rake 300, the soil mass plowed by the front plough part 130 is caught by the rear plough part 140 and is not smoothly discharged to the rear, and a phenomenon of soil mass accumulation occurs.

In particular, in a field such as clay, a lot of stacking phenomenon occurs between the front plow section 130 and the rear plow section 140 due to such soil blocks, resulting in difficulty in performing work.

Therefore, the front rake 300 of the present invention can finely divide the soil mass plowed by the front plowing part 130, and easily discharge the soil mass backward through the rear plowing part 140, thereby reducing the phenomenon of soil mass accumulation.

On the other hand, in the case of plowing a clay-type cultivated land, when the rear plowing part 140 plows, soil outside a portion to be plowed is also plowed in a lump, and thus the edge portion of the cultivated land is not plowed neatly.

Thus, when the front rake 300 is towed, the swivel plate 322 digs into the field and cuts the ground straight, so that the following rear plow portion 140 plows only within the cutting range, and the edge of the field can be cleaned.

For this, as shown in fig. 5, the distance between the outer circumferential surface of the rotating plate 322 of the front rake 300 and the connecting rod 350 has a distance D corresponding to the cutting depth of the arable land, so that the arable land is cut while the rotating plate 322 is rotated.

As a third embodiment of the present invention, a structure may be adopted in which a front rake 300 is provided between the front plow part 130 and the rear plow part 140, and a rear rake 200 is provided at the rear of the rear plow part 140.

The front rake 300 and the rear rake 200 have the same structure as described above.

Therefore, the front rake 300 firstly breaks the clods plowed by the front plowing part 130 to eliminate the piling phenomenon, and secondly finely breaks the clods by the rear rake 200, so that the leveling work is also performed together.

Meanwhile, as shown in fig. 6, there may be a structure in which the front rake 300 and the rear rake 200 may be connected to each other by a chain 400 or a belt to transmit rotational force to each other, a sprocket 370 or a pulley is coupled to the rotational shaft 321 of the front rake 300 and the rotational shaft 231 of the rear rake 200, respectively, and the sprocket 370 or the pulley is connected to the chain 400 or the belt to transmit rotational force, i.e., driving force, to each other.

That is, when the rotational force of one of the rakes is reduced due to the obstacle, the other rake transmits and supplements the rotational force, thereby enabling smooth crushing and traction.

In addition, the gear ratios of the

sprockets

370 and 280 or pulleys may be different, and in order to finely pulverize the soil by the rapid rotation of the front rake 300 and to perform the crushing and leveling work on the rear rake 200, it is preferable that the rotation of the rear rake 200 is slower than the rotation of the front rake 300, and thus the gear ratios can be set by the different diameters of the

sprockets

370 and 280 or pulleys.

As shown in fig. 7, a first hydraulic motor 371 is fixed to the front support arm 320 of the front rake 300 to be axially combined with the rotation shaft 321, and a second hydraulic motor 281 is fixed to the support frame 210 of the rear rake 200 to be axially combined with the rotation shaft 231, and a rotation force is applied to the front rake 300 and the rear rake 200 by a hydraulic pressure applied from a tractor.

At this time, there is a structure in which the first hydraulic motor 371 receives hydraulic pressure supplied from the tractor through the first hydraulic line 410 to rotate the rotation shaft 321, discharged hydraulic pressure is again supplied to the second hydraulic motor 281 through the second hydraulic line 420 to rotate the rotation shaft 231, and discharged hydraulic pressure is returned to the tractor through the third hydraulic line 430.

Fig. 8 and 9 are structural views showing a structure for applying rotary power generated by a tractor to the front rake 300, and a power coupling 500 is installed at the front of the frame 100, the power coupling 500 being installed at a power shaft of the tractor, i.e., a position directly connected to a rotary joint.

That is, since the power shaft for transmitting the rotational force generated from the tractor to the outside is generally located at the rear central portion of the tractor, it is preferable that the power coupling portion 500 is also located at the front central portion of the frame 100 corresponding thereto.

Therefore, the connecting shaft 530 provided in the power coupling 500 is directly connected to the power shaft of the tractor.

In the power coupling part 500, a bracket-shaped housing 510 is fixed to a lower side of a front center part of the frame 100, a fixed bearing 520 is attached to an inner side of the housing 510, and the connection shaft 530 is attached to the housing through the fixed bearing 520 in a front-rear direction such that a front-rear part of the connection shaft 530 protrudes in a front-rear direction of the housing 510.

Therefore, the connection shaft 530 protruding to the rear of the housing 510 is connected to the front of the power transmission shaft 600 through a universal joint, the power transmission shaft 600 being installed toward the rear, and the rear of the power transmission shaft 600 and the power connection shaft 720 of the gear case 700 are also connected through a universal joint.

The front rake 300 is separated into a left rake 301 and a right rake 302, which are externally mounted on the frame 100, respectively, the left rake 301 and the right rake 302 are mounted on the rotation shafts 321 and 321' by the support arms 320 connected to the frame 100, and internally coupled to the

power shafts

730 and 731 disposed at both sides of the gear box 700, respectively.

The front of the gear box 700 is provided with a power connection shaft 720, and the power connection shaft 720 is connected to the power transmission shaft 600 through a universal joint and converts power received through the power connection shaft 720 into an axial direction, thereby supplying rotational force to the

power shafts

730 and 731.

Thus, the left and

right rakes

301 and 302 are mounted on the

power shafts

730 and 731 to rotate.

The gear box 700 may be fixed to the frame 100 or a fixed structure connected to the frame 100 by a fixing part 710 in the form of a support arm, and is preferably installed to be inclined upward toward the front so as to be aligned with the power transmission shaft 600 in order to improve power transmission efficiency with the power transmission shaft 600.

That is, since the gear box 700 is located at a position lower than the power shaft of the tractor, the power connection shaft 720 of the gear box 700 is disposed to face the connection shaft 530 of the power coupling portion 500, and power transmission efficiency can be greatly improved by one angle change from the power shaft of the tractor to the power connection shaft 720 of the gear box 700.

The gear box 700 is located at a central portion of the rake 300 for one angle change, and from the central portion, in the left-right direction, the left rake 301 and the right rake 302 are separately installed.

Of course, if the position of the gear box 700 is at the same height and position as the power shaft of the tractor, the power shaft is directly connected with the power connection shaft 720 of the gear box 700, so that the power from the tractor can be transmitted to the gear box 700.

In addition, it is also possible to have a structure in which the power coupling part 500 is removed and the power transmission shaft 600 is directly connected between the power shaft 720 of the tractor and the gear box 700 to transmit power.

On the other hand, as shown in the photographs of fig. 10 to 13, the left rake 301 and the right rake 302 may have a structure in which cylindrical bodies thereof are installed between the support arm 320 and the gear box 700, and the crushing blades 270 are installed along the periphery at equal intervals in the length direction.

As described above, specific parts of the present invention are described in detail, and it is apparent to those skilled in the art that the detailed description is only of the preferred embodiments, and the scope of the present invention is not limited thereto.

Therefore, it is intended that the scope of the invention be defined by the claims appended hereto and their equivalents.

Description of the reference numerals

100: frames 110, 120: tractor connecting part

130: front plow 140: rear plough part

150,160: rear support arm 170: cylinder

200: the rear rake 210: supporting frame

220: hinge portions 230, 240: rotary plate

231,241: rotation shaft 250: connecting rod

260: support portion 261: connecting rod assembly groove

262: fixing hole 270: crushing blade

271: bolt hole 272: bolt

273: nut 280: chain wheel

281: the hydraulic motor 300: front rake

310: plow depth adjusting portions 311, 312: support sheet

313,314: pin hole 315: shaft part

316,317: fixing pin 320: front support arm

321: rotation axis 350: connecting rod

370: sprocket 371: hydraulic motor

400: chain 500: power coupling part

510: the housing 520: fixed bearing

530: connecting shaft 600: power transmission shaft

700: gearbox 710: fixing part

720: power connecting shafts 730, 731: a power shaft.

Claims

1. A harrow plough device, comprising:

a rake fixed to the frame between the front and rear plows and rotating to break soil plowed by the plows.

2. A harrow plough device, comprising:

a rake fixed to the frame at a rear of the tilling portion and rotating to break soil plowed by the tilling portion.

3. A harrow plough device, comprising:

a rear rake fixed to the frame at a rear of the tilling portion and rotating to break soil plowed by the tilling portion.

4. The harrow plow apparatus of any one of claims 1 to 3, comprising:

a pair of front support arms, one side of which is rotatably installed at both sides of the frame, and the other side of which is installed at the outer side of the rake or the front rake through a rotating shaft;

5. The harrow plough device of any one of claims 1 to 3, wherein the harrow or front harrow comprises:

6. The harrow plow apparatus of claim 3 wherein the rear harrow comprises:

a support frame elongated in a width direction of the frame;

a rear support arm connecting the frame and the support frame;

7. The harrow plow device of claim 4, wherein the plow depth adjusting part comprises:

a support piece provided in an axial direction of the frame and having a plurality of pin holes formed in an up-down direction;

8. The harrow plow device of any one of claims 5 or 6, further comprising crushing blades mounted at regular intervals along the periphery of the support portion and arranged to protrude in the outside direction of the support portion.

9. The harrow plow apparatus of claim 8 wherein the crushing blade is detachable from the support portion.

10. The harrow plow apparatus of any one of claims 5 or 6, wherein the support part is formed with a fixing hole into which the crushing blade is fastened by a bolt.

11. The harrow plow apparatus of claim 6 wherein the rear support arm is mounted to be rotatable from a frame, rotatably connected to the frame by one side of a hydraulically telescopic cylinder, and rotatably connected to the support frame by the other side of the cylinder.

12. The harrow-equipped plough apparatus of claim 3, wherein sprockets or pulleys are provided on the rotary shafts of the front and rear harrow, respectively, and a chain or belt is connected between the sprockets or pulleys to transmit the rotary force.

13. The harrow mounted tilling plough apparatus of claim 3, wherein hydraulic motors are mounted on the rotary shafts of the front and rear harrow for applying a rotary force.

14. A harrow plough device, comprising:

a plow section provided with a plurality of plowers in a width direction of the frame;

a rake located at the rear of the tilling portion to break soil plowed by the tilling portion;

a gearbox connected to a shaft of the rake;

and the power transmission shaft is connected with the power shaft of the tractor and the power connecting shaft of the gear box so as to transmit power.

15. The harrow-carrying tilling plough device of claim 14, wherein the harrow is separated into a left harrow and a right harrow, a gear box is arranged between the separated left harrow and the right harrow, and a power shaft of the gear box is connected to a rotating shaft of the left harrow and the right harrow.

16. The harrow-mounted plough apparatus of claim 13, wherein the frame is provided with a power coupling part directly connected with a power shaft of a tractor, and the power coupling part is connected with a power connecting shaft of the gear box through a power transmission shaft.

17. The harrow plow apparatus of claim 16 wherein the power transmission shafts are connected by universal joints.