JP7142381B2 - Tillage equipment with harrow - Google Patents

Description

TECHNICAL FIELD The present invention relates to a cultivating device having a harrow, and more particularly, to a cultivating device for cultivating cultivated land by the traction force of a tractor, and having a harrow that crushes the cultivated land and evenly rakes it. It relates to cultivating equipment.

In the present invention, the conventional technology and the technology of the present invention will be described by taking a hoe, which is typically used among cultivators, as an example, but the present invention is not limited to the hoe.

In general, plows are used for the purpose of cultivating crops by digging up the soil using livestock such as cattle and horses, machinery, etc., turning it over, and making furrows.

A typical tractor plow is a support body composed of a front frame and a rear frame, as disclosed in Korean Utility Model No. 20-0200074 (improved plow for tractors) registered by the applicant. The front frame is provided with a plurality of front joints, and the rear frame is provided with a plurality of rear frames.

Cultivated land is dug up by a plow of such construction, and a harrow is used to break up the soil clods produced during the digging process.

In the Korean Patent No. 10-1053758 (Harrow Cultivator with a Spear), a plurality of plowing blades vertically rotatably formed at regular intervals on the lower side of the main body are the driving part of the tractor. It rotates in the horizontal direction by being gear-engaged with and applying power to crush the soil finely.

However, since the conventional harrow has a gear engagement structure for transmitting power to a plurality of tillage blades, the structure is very complicated, and the complexity increases the manufacturing cost. There is an inconvenience.

In addition, although such a harrow can crush a lump of soil finely, it is not possible to agitate the crushed soil. etc. are exposed on the ground and must be removed separately, resulting in very poor workability.

Republic of Korea Utility Model No. 20-0200074 (Improved plow for tractors) Korean Registered Patent No. 10-1053758 (Harrow Cultivator with Spear)

In order to solve such conventional problems, the present invention crushes the lumps of soil dug up by the cultivator, rakes the crushed soil, and presses the dug-up by-products to the ground at the same time. The purpose is to provide a cultivating device with a harrow that is capable of doing so.

In order to achieve the above objects, the cultivation apparatus with harrows according to the first embodiment of the present invention comprises a frame having a tractor connection in front so as to be pulled by a tractor, and a front portion of the frame. a front farming section in which a plurality of cultivators are arranged in the width direction; a rear farming section in which a plurality of cultivators are arranged in the width direction in the rear portion of the frame; and between the front farming section and the rear farming section. a front harrow that is fixed to the frame in and rotates to crush the soil dug up by the farming unit.

Also, the cultivating apparatus having said harrow comprises a pair of front supports, one side of which is rotatably pivoted on opposite sides of said frame and the other side of which is pivoted by a pivot outside said front harrow. and an arm and a plowing depth adjusting unit fixed to the frame for adjusting the plowing depth of the cultivator by fixing the vertical rotation angle of the front support arm.

Further, the front harrow includes a pair of rotating plates that are pivoted to rotate on the other side of the pair of front support arms, respectively, and a plurality of bar-shaped rotating plates, each of which has a pair of rotating plates at both ends thereof. A connecting bar that is fixed along the circumference of the plates while maintaining a constant interval to connect the pair of rotating plates, and a ring-shaped or disk-shaped connecting bar that fits inside or outside of the plurality of connecting bars. and a plurality of front support parts are provided at regular intervals to support the connecting bar so as not to bend by fixing the connecting bar around the outer side or the inner side.

Further, the plowing depth adjusting unit includes a support piece provided in the lateral direction of the frame and having a large number of pin holes formed in the vertical direction, and a support arm that is inserted into the pin holes of the support piece to move the support arm upward. and a fixing pin for fixing the lower movement.

Furthermore, the cultivating device having the harrow further comprises crushing blades provided at regular intervals along the periphery of the support and arranged to protrude outward from the support, The crushing blade is attachable to and detachable from the support portion, the support portion is formed with a fixing hole, and the crushing blade is configured to be fastened to the fixing hole with a bolt.

In addition, a cultivating apparatus having a harrow according to a second embodiment of the present invention includes a frame having a tractor connecting portion in front so as to be towed by a tractor, and a plurality of cultivators in the front portion of the frame in the width direction. and a rear harrow that is fixed to the frame behind the farming unit and rotates to crush the soil dug up by the farming unit.

The rear harrow includes a support frame extending in the width direction of the frame, a rear support arm connecting the frame and the support frame, and rotating at both ends of the support frame in the pulling direction of the frame. and a plurality of rod-shaped rotating plates, both ends of which are fixed along the circumference of the pair of rotating plates while maintaining a constant interval. A connecting bar for connecting each other, having a ring shape or a disk shape, is inserted inside or outside of the plurality of connecting bars, and the connecting bar is fixed around the outside or inside so that the connecting bar is bent. and a plurality of supporting parts arranged at regular intervals.

Further, a cultivator with a harrow according to a third embodiment of the present invention includes a frame having a tractor coupling at the front for being towed by a tractor, and a plurality of cultivators in the width direction at the front portion of the frame. a rear farming section in which a plurality of cultivators are arranged in the width direction at the rear portion of the frame; and fixed to the frame and rotating between the front farming section and the rear farming section a front harrow for crushing the soil dug up by the farming section by doing so, and a rear harrow for crushing the soil dug up by the farming section by being fixed to the frame behind the rear farming section and rotating, characterized by comprising

In addition, sprockets or pulleys are provided on the rotating shafts of the front harrow and the rear harrow, respectively, and the sprockets or the pulleys are connected to each other by chains or belts to transmit rotational force.

Further, the rotating shafts of the front harrow and the rear harrow are provided with hydraulic motors to apply rotational force.

According to the present invention having such a configuration, the front harrow is provided between the front farming section and the rear farming section provided on the frame, so that the soil dug up from the front farming section is primarily finely ground. The crushing has the advantage of eliminating the problem that the soil dug up from the front tillage accumulates between the rear tillages.

Further, by adjusting the height of the front harrow, it is possible to adjust the tilling depth of the front tilling section, so there is an advantage that the efficiency of the tilling work can be enhanced.

In addition, a plurality of rotating connecting bars, both ends of which are fixed to a pair of rotating plates, and crushing blades crush the excavated soil lumps into small pieces, and the rotation of the connecting bars scrapes the ground. Alternatively, since by-products such as plant roots are also buried in the ground, there is no need to deploy a separate working machine for raking.

As a result, the work of plowing, crushing, and raking can be performed at the same time, so that not only is the workability very good, but also the structure is very simple, and a separate work machine is not required. Since it is not necessary, there is an effect that a cost saving effect can also be achieved.

1 shows the structure of a tillage device with a harrow according to the invention; FIG. FIG. 4 is a diagram showing the structure of a harrow applied in the present invention; It is a figure which shows the structure by which a crushing blade is attached to a support part. FIG. 5 is a diagram for explaining the operation of adjusting the tillage depth of the front tillage unit by the tillage depth adjustment unit; FIG. 4 is a diagram for explaining the operation of edging a cultivated portion of cultivated land with a front harrow; It is a figure which shows the structure which a front harrow and a rear harrow are connected with a chain or a belt, and transmit a rotational force. It is a figure which shows the structure which provides a front harrow and a rear harrow with a hydraulic motor and applies a rotational force. FIG. 11 shows another form of structure for applying a rotational force to the harrow. FIG. 11 shows another form of structure for applying a rotational force to the harrow. 1 is a photograph of the present invention applying power to a harrow. 1 is a photograph of the present invention applying power to a harrow. 1 is a photograph of the present invention applying power to a harrow. 1 is a photograph of the present invention applying power to a harrow.

The above objects, features and advantages will be described in detail below with reference to the accompanying drawings, so that those skilled in the art in the technical field to which the present invention belongs can easily implement the technical idea of the present invention. is.

In describing the present invention, detailed descriptions of well-known techniques related to the present invention will be omitted if it is recognized that they may unnecessarily obscure the gist of the present invention.

As the terms used in the present invention, general terms that are currently widely used were selected as much as possible while considering the functions in the present invention. It varies depending on judicial precedents and the emergence of new technologies.

In certain cases, there are terms arbitrarily selected by the applicant, and in such cases, their meanings are described in detail in the column of the description of the invention concerned.

Therefore, the terms used in the present invention should be defined based on the meanings of the terms and the content of the present invention as a whole, rather than just the names of the terms.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail based on the accompanying drawings.

The embodiments of the invention illustrated below, however, are capable of many other modifications, and the scope of the invention is not limited to the embodiments detailed below.

Rather, the embodiments of the present invention are provided so that this invention will be fully understood by those of ordinary skill in the art.

The cultivating device having a harrow according to the first embodiment of the present invention is largely composed of a frame 100, a front cultivating section 130, a rear cultivating section 140, and a rear harrow 200.

Here, the front farming unit 130 and the rear farming unit 140 are illustrated by taking a plow, which is a type of farmer, as an example, and the frame 100 may have a form in which only the rear farming unit 140 is provided. .

The frame 100 is connected to the rear of a tractor to be towed. Three-point tractor connecting parts 110 and 120 are arranged in the front of the frame 100 in the vertical direction. A front cultivating section 130 is provided in which a plurality of cultivators are fixed in the width direction of the frame 100 with a space therebetween. A rear tillage section 140 fixed in the width direction is provided.

Only one of the front farming section 130 and the rear farming section 140 may be provided on the frame 100, or the two farming sections 130 and 140 may both be mounted on the frame 100. They may be provided in the front and rear, respectively.

A rear harrow 200 is provided behind the rear tillage section 140. One side of the rear harrow 200 is rotatably mounted on the frame 100 by a hinge 171, and the other side is pivoted to the frame 100. The support frame 210 is configured to rotate up and down by a cylinder 170 rotatably mounted on the support frame 210 by a hinge part 220 to be lifted from the ground or lowered to the ground.

In addition, a pair of rear support arms 150 and 160 are positioned on both sides of the cylinder 170 so that the rear harrow 200 can be stably supported by the frame 100 and rotated vertically by the cylinder 170 to support them. One side of the arms 150 and 160 is pivoted on the frame 100 so as to be vertically rotatable, and the other side is fixed to the rear harrow 200 .

As shown in FIG. 2, the rear harrow 200 is shaped like a cylinder that rotates and rolls in the pulling direction of the tractor by means of a pair of rear support arms 150 and 160, and is long in the width direction of the frame 100. A support frame 210 is provided with the other side of the cylinder 170 pivoted in the center, and the other sides of the rear support arms 150, 160 are fixed on both sides thereof.

Both ends of the support frame 210 extend downward, and disk-shaped rotating plates 230 and 240 are respectively mounted on the extended portions by rotating shafts 231 and 241 so as to rotate in the pulling direction of the tractor. A plurality of connecting bars 250 are positioned between a pair of rotating plates 230 and 240 to connect the rotating plates 230 and 240 to each other.

That is, both ends of a plurality of rod-shaped connection bars 250 are fixed along the circumference of the rotating plates 230 and 240 at regular intervals, so that the rotating plates 230 and 240 are spaced apart from each other at both ends of the support frame 210 . They are connected to each other and allow a rolling motion with the traction of the tractor.

At this time, both ends of the plurality of connecting bars 250 are not horizontally fixed at the same positions of the rotating plates 230 and 240, and are connected so that they are inclined slightly downward as they move from one direction to the other direction. preferably.

This is for the purpose of efficiently crushing the lumps of soil cultivated by the front and rear cultivation units 130 and 140 and effectively burying by-products such as straw and plant roots in the ground.

That is, a single connecting bar 250 touches the ground from one side to the other in a timed sequence, allowing the crushing operation to occur while minimizing the drag on the soil clumps or by-products. .

In addition, since the connecting bar 250 has a long bar shape, there is a risk that the connecting bar 250 may bend due to the resistance of a lump of soil or a root of a plant. Moreover, in order to prevent bending, a plurality of support portions 260 are arranged at regular intervals.

The support part 260 has a circular ring shape and may be inserted inside the plurality of connection bars 250 and the connection bar 250 may be fixed to the outside thereof. The connecting bar 250 may be inserted into the inside of and fixed to the inside of the connecting bar 250 .

The drawing shows a structure in which the ring-shaped support part 260 is fitted inside the plurality of connection bars 250 and the plurality of connection bars 250 are fixed to the outside thereof. , and when fitted to the outside of the connecting bar 250, it assumes the shape of a ring.

As shown in FIG. 3, the support part 260 has a circular ring shape, and has a connecting bar fitting portion for fitting and fixing the connecting bar 250 to a portion where the connecting bar 250 contacts and is fixed on the outside. Grooves 261 are formed at regular intervals, and the connecting bar 250 is fixed by welding or the like after being inserted into the connecting bar fitting groove 261 .

Of course, such a support 260 may present the shape of a disk, as mentioned above.

Further, the crushing blades 270 are fixed to the support portion 260 at regular intervals. 260 so as to protrude outward.

It is fixed at a position where it does not interfere with the connecting bars 250, that is, protruding outward through the gap between the connecting bars 250, and crushes the lumps of soil dug up by the cultivating units 130 and 140 into small pieces.

That is, although the lumps of soil can be crushed by the rotation of the connecting bar 250, the crushing blades 270 further crush the lumps of soil into smaller pieces so that the raking work can be carried out more efficiently.

For attachment and detachment of the crushing blade 270, a fixing hole 262 is formed between each connecting bar fitting groove 261, and a bolt hole 271 is formed in the lower part of the crushing blade 270. The bolt hole 271 and the fixing hole It may have a structure in which a bolt 272 is inserted through 262 and fastened with a nut 273 .

Needless to say, various attachment/detachment structures of the crushing blade 270 can be realized, and the structure of the crushing blade 270 may also have various shapes for crushing lumps of soil.

An operating state according to the first embodiment of the present invention will be described.

During travel, the cylinder 170 is retracted so that the rear harrow 200 can be moved in a raised state, and in the field for tillage operations the cylinder 170 is extended and lowered so that the rear harrow 200 touches the ground.

At this time, if the cylinder 170 is further extended while the rear harrow 200 is in contact with the ground, the rear harrow 200 is supported on the ground and the rear of the frame 100 is lifted. is also lifted and the plowing depth, that is, the plowing depth becomes shallow.

Conversely, when the cylinder 170 is extended so that the rear harrow 200 approaches the ground, the rear harrow 200 is not supported on the ground, and the frame 100 and the front tillage section 130 and the rear tillage section 140 are separated. It digs deeper into the soil due to its own weight, increasing the plowing depth.

Needless to say, when the front farming section 130 and the rear farming section 140 dig into the ground and the frame 100 descends, the rear harrow 200 is naturally supported by contacting the ground without the cylinder 170 extending. The bearing force fixes the plowing depth at that position.

In short, by adjusting the height of the rear harrow 200 according to the extension length of the cylinder 170, the plowing depths of the front plowing section 130 and the rear plowing section 140 can be adjusted.

Next, when the tractor moves forward and pulls the frame 100, the front farming section 130 and the rear farming section 140 dig into the ground based on the set plowing depth, and the rear harrow 200 moves in the pulling direction due to the pulling force. The connecting bar 250 and the crushing blade 270 break up the lumps of soil dug up by the cultivating units 130 and 140 while making rolling motions to break them down into small pieces, thereby performing the raking work.

Also, by rotating the connecting bar 250, by-products such as straw and plant roots are buried in the ground.

Therefore, the rotation of the connecting bar 250 facilitates the leveling work.

A tillage device having a harrow according to the second embodiment of the present invention comprises a front harrow 300 between a front tillage section 130 and a rear cultivation section 140, and the structure of the front harrow 300 is as follows: It is similar to the structure of the rear harrow 200 of the first embodiment of the present invention.

However, although there is a difference in the structure in which the front harrow 300 is supported by the frame 100 through the plowing depth adjusting units 310 and 310', the height of the front harrow 300 is adjusted by the plowing depth adjusting units 310 and 310'. By adjusting, the plowing depth of the front plowing section 130 and the rear plowing section 140 can be adjusted.

That is, the rear portion of the frame 100 rotates vertically around the three-point tractor connecting portions 110 and 120 connected to the tractor, thereby adjusting the plowing depth of the front tilling portion 130 and the rear tilling portion 140. When adjusting the plowing depth of the rear tilling unit 140, the plowing depth of the front plowing unit 130 is set shallower than the plowing depth of the rear plowing unit 140. Therefore, the plowing depth of the front plowing unit 130 must be adjusted to a desired plowing depth. can't

Therefore, by adjusting the height of the front harrow 300, the height of the front of the frame 100 is adjusted to adjust the plowing depth of the front plowing unit 130. FIG.

For this purpose, the front harrow 300 is fixed to the front part of the frame 100 through the plowing depth adjusting parts 310, 310', and the extension frame further extends outward from both sides of the front part of the frame 100. 101 , 101 ′ are deployed, and these extension frames 101 , 101 ′ are formed to protrude further outward than the front cultivated portion 130 .

The extension frames 101 and 101' are provided with plowing depth adjusting parts 310 and 310', respectively. The structure will be mainly described.

The plowing depth adjusting part 310 has a pair of support pieces 311 and 312 which are fixed on the extension frame 101 so as to be arranged rearwardly with a space therebetween. 313 and 314 are formed.

These pin holes 313 and 314 are formed in the vertical direction, preferably along the rotational path of the front support arm 320 .

The front support arm 320 is bent downward so that the rear thereof faces the front harrow 300, and the front of the front support arm 320 rotates vertically between the pair of support pieces 311 and 312 by means of a shaft 315. The shaft is set as follows.

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 directions. The front support arm 320 is hooked on the fixing pins 316 and 317 and fixed so as not to rotate.

That is, the fixing pins 316 and 317 serve as stoppers that prevent the front support arm 320 from rotating.

A plurality of these pin holes 313 and 314 are formed in the range of the maximum rotation angle of the front support arm 320, and the lower end portion of the pin holes 313 and 314 formed on the uppermost side is positioned so that the front support arm 320 can be rotated to the maximum upper side. When the front support arm 320 is rotated downward, it becomes the same height as the upper end portion of the front support arm 320, and the upper end portions of the pin holes 313 and 314 formed on the lowermost side are also similarly rotated downward to the maximum extent of the front support arm 320. It should be at the same height as the lower end of the front support arm 320.

Further, the spacing between each pin hole 313, 314 is commensurate with the thickness of the front support arm 320. As shown in FIG.

Both sides of the front harrow 300 are rotatably connected to the front support arm 320 by rotating shafts 321 .

Therefore, as shown in FIG. 4, when the front support arm 320 is fixed with pin holes 313, 314 and fixing pins 316, 317 by adjusting the inclination angle, the front harrow 300 is grounded on the ground G and stretched, The force applied to the ground adjusts the degree to which the frame 100 is lifted, thereby adjusting the depth to which the front tiller 130 digs into the land, ie, the plowing depth.

That is, if it is desired to reduce the plowing depth, the angle of inclination of the front support arm 320 is increased so that the front harrow 300 pushes and lifts the frame 100, thereby increasing the distance between the frame 100 and the ground G, thereby increasing the distance between the front tiller. If the plowing depth of 130 is adjusted to be thin, and conversely, if the plowing depth is to be increased, the angle of the front support arm 320 is moderated to reduce the distance between the frame 100 and the ground G. Adjust so that it penetrates deeply into the

As another form of the plowing depth adjusting part 310, a pin hole is formed through the front support arm 320, and one fixed pin is formed through the pin holes 313 and 314 and the pin hole formed in the front support arm 320. It may be structured to lock the forward support arm 320 from rotation by being engaged therethrough.

In addition, since the front harrow 300 is positioned between the front farming section 130 and the rear farming section 140, the soil dug up by the front farming section 130 is crushed and delivered to the rear. In the case of a cultivator in which only the front cultivating part 130 and the rear cultivating part 140 are deployed without being deployed, a lump of soil dug up from the front cultivating part 130 is caught in the rear cultivating part 140 and cannot be smoothly discharged backward. As a result, a phenomenon occurs in which lumps of soil accumulate.

In particular, in cultivated land such as muddy soil, such clumps of soil frequently accumulate between the front cultivated portion 130 and the rear cultivated portion 140, making it difficult to work.

Therefore, the front harrow 300 of the present invention crushes the lumps of soil dug up from the front tillage section 130 into small pieces so that the lumps of soil can be easily discharged rearward through the rear cultivation section 140. The accumulation phenomenon is eliminated.

On the other hand, in the case of cultivating a mud-type cultivated land, when the rear cultivating unit 140 digs up the land, the soil outside the side portion of the portion to be cultivated is dug up in a lump shape. The face is dug up very messily.

Therefore, when the front harrow 300 is towed, the rotating plate 322 bites into the cultivated land and cuts open the land in a straight line, so that the following rear cultivated section 140 digs up the land only within the cut open range. The perimeter of cultivated land can be cleaned.

For this reason, as shown in FIG. 5, by setting the distance between the outer peripheral surface of the rotating plate 322 of the front harrow 300 and the connecting bar 350 to a distance D corresponding to the cutting depth of the cultivated land, the rotating plate 322 can be It cuts open the cultivated land while rotating.

The third embodiment of the present invention has a structure in which a front harrow 300 is provided between the front tillage section 130 and the rear cultivation section 140, and a rear harrow 200 is provided behind the rear cultivation section 140. may

The construction of such forward harrow 300 and rear harrow 200 is similar to the construction described above.

Therefore, the front harrow 300 primarily crushes the lumps of soil dug up by the front farming unit 130 to eliminate the pile-up phenomenon, and the rear harrow 200 secondarily crushes the soil finely and scrapes it. Do up to work.

On the other hand, as shown in FIG. 6, the front harrow 300 and the rear harrow 200 may be connected by a chain 400 or a belt to transmit the rotational force to each other. A sprocket 370 or a pulley is coupled to the rotating shaft 321 of the rear harrow 200 and the rotating shaft 231 of the rear harrow 200, respectively. do.

That is, if the rotational force of one of the harrows is reduced by an obstacle, the remaining harrow transmits the rotational force to compensate for it, thereby enabling smooth crushing work and traction.

In addition, the gear ratio of the sprockets 370, 280 or the pulleys may be different, but in the case of the front harrow 300, the soil is finely crushed with high rotation, and in the case of the rear harrow 200, the work of crushing and breaking. Because it is preferable to rotate slower than the forward harrow 300 for the sprockets 370, 280 or pulleys of different diameters, it is possible to set the gear ratio.

FIG. 7 shows that a first hydraulic motor 371 is fixed to the front support arm 320 of the front harrow 300 and axially coupled to the rotary shaft 321, and a second hydraulic motor 371 is mounted to the support frame 210 of the rear harrow 200. is fixed and axially connected to the rotating shaft 231, so that the hydraulic pressure applied from the tractor applies rotational force to the front harrow 300 and the rear harrow 200.

At this time, the first hydraulic motor 371 is applied with the hydraulic pressure supplied from the tractor through the first hydraulic line 410 to rotate the rotating shaft 321, and the discharged hydraulic pressure flows through the second hydraulic line 420 again. Hydraulic pressure is applied to the second hydraulic motor 281 through the third hydraulic line 430 to rotate the rotary shaft 231, and the discharged hydraulic pressure is returned to the tractor through the third hydraulic line 430.

8 and 9 show a structure for applying rotational power generated from a tractor to the harrow 300. A power coupling unit 500 is installed at the front part of the frame 100. Such power coupling is shown in FIGS. The part 500 is provided at a position directly connected to the power shaft of the tractor, that is, the rotary joint.

That is, since the power shaft for transmitting the rotational force generated from the tractor to the outside is generally positioned at the rear central portion of the tractor, the power coupling part 500 is also positioned at the corresponding position of the frame 100. It is preferably located in the front middle region of the .

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

The power coupling part 500 has a bracket-shaped housing 510 fixed to the lower side of the front center portion of the frame 100, a fixed bearing 520 is provided inside the housing 510, and the connecting shaft 530 is connected to the fixed bearing. A front portion and a rear portion of the connecting shaft 530 protrude in the front-rear direction of the housing 510 by penetrating the housing 520 in the front-rear direction.

For this reason, the connecting shaft 530 projecting rearward from the housing 510 is connected to the front portion of the power transmission shaft 600 provided toward the rear portion by a universal joint. A power connecting shaft 720 is connected by a universal joint.

The harrow 300 is divided into a left harrow 301 and a right harrow 302, the outer portions of which are pivoted on the frame 100, and the support arms 320 connected to the frame 100 rotate shafts 321, 321'. and the inner parts are connected to power shafts 730 and 731 arranged on both sides of the gear box 700, respectively.

The gearbox 700 has a power connection shaft 720 at its front portion and is connected to the power transmission shaft 600 by a universal joint. , 731 with rotational force.

Therefore, the left harrow 301 and the right harrow 302 are provided on these 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 support arm-like fixing part 710, and may be attached to the power transmission shaft 600 to improve power transmission efficiency. It is preferably provided so as to be inclined upward toward the front so as to be positioned on a straight line with 600 .

That is, since the gear box 700 is located at a position lower than the power shaft of the tractor, the power connecting shaft 720 of the gear box 700 is arranged so as to look at the connecting shaft 530 of the power coupling portion 500. The power transmission efficiency is greatly increased by a single angle change to the power connecting shaft 720 of the gear box 700 .

For one angle change, the gear box 700 is positioned at the central portion of the harrow 300, and the left harrow 301 and the right harrow 302 are separated from the central portion in the left and right direction and are axially mounted. be done.

Needless to say, if the position of the gear box 700 is at the same height as the power shaft of the tractor, the power shaft and the power connecting shaft 720 of the gear box 700 are directly connected so that the power from the tractor can be obtained. can be transmitted to the gear box 700 .

Also, the power coupling part 500 may be removed and the power transmission shaft 600 may be directly connected between the power shaft of the tractor and the power connection shaft 720 of the gearbox 700 to transmit power.

On the other hand, the left harrow 301 and the right harrow 302 are laterally placed cylindrical bodies pivoted between the support arm 320 and the gearbox 700, as shown in the photographs of FIGS. It may have a structure in which the crushing blades 270 are provided along the outer circumference at equal intervals in the longitudinal direction.

Although specific portions of the subject matter of the present invention have been described in detail above, such specific descriptions are merely preferred embodiments, to those of ordinary skill in the art, and thus the scope of the present invention is not disclosed. is not constrained.

Accordingly, the substantial scope of the invention will be defined by the claims appended hereto and their equivalents.

REFERENCE SIGNS LIST 100 frame 110, 120 tractor coupling 130 front tillage 140 rear tillage 150, 160 rear support arm 170 cylinder 200 rear harrow 210 support frame 220 hinge 230, 240 rotary plate 231, 241 rotary shaft 250 coupling bar 260 support 261 Connecting bar fitting groove 262 Fixed hole 270 Crushing blade 271 Bolt hole 272 Bolt 273 Nut 280 Sprocket 281 Hydraulic motor 300 Front harrow 310 Plowing depth adjusting part 311, 312 Support piece 313, 314 Pin hole 315 Axle 316, 317 Fixing pin 320 Front support arm 321 Rotating shaft 350 Connecting bar 370 Sprocket 371 Hydraulic motor 400 Chain 500 Power coupling part 510 Housing 520 Fixed bearing 530 Connecting shaft 600 Power transmission shaft 700 Gear box 710 Fixed part 720 Power connecting shaft 730, 731 Power shaft

Claims (2)

a frame having a tractor hitch forward for being towed by a tractor;
a front cultivating section in which a plurality of cultivators are arranged in the width direction at the front portion of the frame;
a rear cultivating section in which a plurality of cultivators are arranged in the width direction at the rear portion of the frame;
a front harrow that is fixed to the frame between the front farming section and the rear farming section and rotates to crush the soil dug up by the farming section;
a rear harrow that is fixed to the frame behind the rear cultivation unit and rotates to crush the soil dug up by the cultivation unit;
Sprockets or pulleys are arranged on the rotating shafts of the front harrow and the rear harrow, respectively, and a chain or belt connects the sprockets or the pulleys to each other to transmit rotational force. Device. a frame having a tractor coupling in front so as to be towed by the tractor and provided with a power coupling directly connected to the power shaft of the tractor;
a cultivating section in which a plurality of cultivators are arranged in the width direction of the frame;
a harrow located behind the farming unit for crushing the soil dug up by the farming unit;
a gearbox disposed at the bottom of the frame and connected to the shaft of the harrow to transmit power;
It is composed of a universal joint, and is composed of a power transmission shaft that connects the power coupling part of the frame and the power connection shaft of the gear box to transmit power,
The power coupling portion has a bracket-shaped housing fixed to the lower side of the front center portion of the frame, a fixed bearing provided inside the housing, and a connecting shaft passing through the fixed bearing in the front-rear direction. By being provided, it is attached so that the front part and the rear part of the connecting shaft protrude in the front-rear direction of the housing,
The gear box is provided so that the power connection shaft is inclined upward in the direction of viewing the power coupling portion, the gear box is positioned in a straight line with the power transmission shaft, and the harrow has a cylindrical shape. It consists of a fuselage separated into left and right harrows, said left and right harrows being laterally aligned in a straight line with their outer portions respectively pivoted on said frame, said separated left and right harrows The gearbox is positioned between the harrows, and is configured such that the power shaft of the gearbox and the rotary shafts of the left and right harrows are connected, and equidistantly spaced outward in the longitudinal direction of the fuselage. A cultivating device having a harrow characterized in that it is provided with crushing blades along its circumference.

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