JP4971407B2 - Plow device for tractor - Google Patents

Description

The present invention is capable of efficiently cultivating a large area of cultivated land with a plurality of skeleton parts arranged in a well-balanced manner, and can perform continuous work because soil is not offset during cultivating work, and It is possible to relieve the impact when rock overload occurs on any of the multiple body parts, to prevent damage to the equipment and to improve work efficiency, and to easily change the body part according to the user's choice. The present invention relates to a plow device for a tractor that can adjust a working depth and can perform continuous work, and as a result, work efficiency can be improved.

In general, a plow is used to dig up the field soil using livestock such as cattle and horses or machines for the purpose of cultivating crops, and to reverse it to perform upsetting work.

In particular, in a plow device mounted on a machine such as a tractor, when a main body having a predetermined shape is provided with a housing portion made of a shearing and earthen plate so as to be rotatable up and down, the tractor advances in the soil. Then, the main frame and the skeleton body connected to the main frame and the skeleton body are pulled, and the field soil can be dug up to perform the tilling work.

As described above, the conventional plow device for a tractor may be composed of a multiple plow device having a plurality of housing parts according to the size and horsepower of the tractor. Usually, a plow device for a tractor is provided with a plurality of three or more chassis parts, and each chassis part may be arranged in a left-right row or a zigzag pattern with respect to the main frame.

Such a conventional plow device for a tractor is such that a plurality of chassis parts are dug into the soil during a tilling operation and then pulled by the tractor to perform the tilling work. When the parts are arranged in a single line on the left and right, the side force generated when each chassis part digs up the field soil increases, so it is arranged in a staggered manner to distribute the side force generated in the chassis part. Can be made. However, in the case of a large-area field, even if a plurality of skeleton parts are arranged in a staggered manner, the skeleton part is formed only in the rear and the center of gravity is biased rearward, and the traction in the forward linear direction However, there is a disadvantage that it is never easy.

In addition, an unexpected situation may occur in which the body part collides with the rock embedded in the soil. At this time, if the body part is simply fixed to the main frame, the impact force of the rock Is transmitted as it is, and the housing part is damaged or deformed to break the shape of the bag or cause a failure of the entire apparatus.

Furthermore, when lowering the lower link during cultivating work and the body part is dug into the soil, the working depth of the body part, that is, the body part is in the soil according to the soil condition and the form of the zone. It is necessary to vary the depth of digging. At this time, when the plow device is simply attached to the tractor, the user has to adjust the connection height of the tractor and the plow device to connect them. That is, according to the working depth of the housing part, the user has to repeat the manual release and rejoining in order to adjust the height of the main frame provided with the housing part. . That is, it is inconvenient that the work efficiency is lowered by repetitive release and reconnection for adjusting the height of the main frame, the user's fatigue is increased, and the failure of the apparatus becomes severe.

The present invention has been made in view of the above circumstances, and the purpose of the present invention is to efficiently cultivate a large-area field by arranging a plurality of skeleton parts in a well-balanced manner. The object of the present invention is to provide a plow device for a tractor that can perform continuous work because it is not offset.

Another object of the present invention is to relieve the impact at the time of occurrence of an overload caused by rocks on any of the plurality of housing parts, to achieve both prevention of damage to the apparatus and improvement of work efficiency. It is an object of the present invention to provide a plow device for a tractor capable of buffering the entire body of each tractor.

Still another object of the present invention is to enable easy adjustment of the working depth of the housing according to the user's selection and to perform continuous work. As a result, work efficiency can be improved. A plow device for a tractor is provided.

Other objects, specific advantages and novel features of the present invention will become more apparent from the following detailed description and preferred embodiments taken in conjunction with the accompanying drawings.

In order to achieve the above-mentioned object, a plow device for a tractor according to the present invention includes a main frame having a tractor connecting portion that is connected to a tractor and pulled to the front, and is disposed on the main frame and has a share. A plow device for a tractor comprising a plurality of frame parts having a base plate, wherein each of the plurality of frame parts is arranged obliquely on a side surface along the longitudinal direction of the main frame, A foremost housing portion of the housing portion protrudes from a front end of the main frame, a shear plate is formed in a direction of viewing the main frame, and the foremost housing of the plurality of housing portions is formed. The rest of the chassis part excluding the body part is characterized in that a shearing and shearing board is formed in a direction opposite to the foremost chassis part.

In order to achieve another object of the present invention, a tractor plow apparatus according to the present invention includes a main frame having a tractor connecting portion that is connected to the tractor and pulled forward, and is rotatably disposed on the main frame. A plurality of housing portions provided, a plurality of drive cylinders for rotating each of the housing portions up and down, and a pair of hydraulic lines for providing hydraulic pressure so that each of the drive cylinders reciprocates linearly. Prepare.

In the plow device for a tractor according to the present invention, a pair of the buffer springs may be provided and arranged in parallel to the left and right of the buffer cylinder.

In this case, a connecting rod that connects the tip of the piston rod of the buffer cylinder and the other end of the buffer spring, and a guide rail that is disposed on the main frame and that slidably guides both ends of the connecting rod, You may have.

In order to achieve another object of the present invention, a plow device for a tractor according to the present invention includes a main frame having a tractor connecting portion that is connected to the tractor to be pulled forward and disposed on the main frame. In a tractor plow apparatus comprising a housing part, a first support link rotatably disposed on one side of the main frame, and a lower end of the first support link are rotatably disposed. And a first cylinder having one end hinged to the main frame and the other end hinged to the upper end of the first support link to rotate the first support link. It becomes.

The plow device for a tractor according to the present invention includes a second support link that is rotatably disposed on the other side of the main frame, and a second support link that is rotatably disposed at a lower end of the second support link. And a second cylinder having one end pin-coupled to the main frame and the other end pin-coupled to an upper end of the second support link to rotate the second support link. It is characterized by.

Furthermore, the tractor plow apparatus according to the present invention includes a second support link rotatably disposed on the other side of the main frame, and a second support link rotatably disposed at a lower end of the second support link. The vehicle further includes two wheels, and a connection link having one end pin-coupled to the upper end of the first support link and the other end pin-coupled to the upper end of the second support link.

In the plow device for a tractor according to the present invention, a plurality of housing parts are disposed obliquely on the main frame, and the foremost housing part among the plurality of housing parts protrudes from the front end of the main frame, A large-area field can be efficiently cultivated, and side force distribution and towing operations are facilitated by a plurality of skeleton bodies arranged in a well-balanced manner.

In addition, the foremost body part of the plurality of body parts and the share of the remaining body parts are formed so that the earth plates face each other, so that the soil in the field does not shift when plowing work, so continuous work And the work efficiency can be improved, and the foremost and remaining shear sections can be arranged in one direction. Since the field soil moves to the next work position after plowing work, it is possible to prevent generation of valleys and ridges.

And by arranging a buffer cylinder and a buffer spring, it is possible to alleviate the impact when rock overload occurs to any of the plurality of housing parts, and to prevent damage to the device and increase the work efficiency, simple configuration The whole of the plurality of housing parts can be buffered through each.

Furthermore, the working link of the chassis can be easily adjusted according to the user's choice by adjusting the height of the main frame by rotating the support link coupled with the wheel by driving the cylinder. Continuous work can be performed, resulting in increased work efficiency.

The perspective view which shows suitable 1st Embodiment of the plow apparatus for tractors by this invention. The top view which shows the operation | movement process of FIG. The perspective view which shows the plow apparatus for tractors by 2nd Embodiment of this invention. The block diagram which shows the state by which the hydraulic line was connected with each drive cylinder and buffer cylinder of FIG. The block diagram which shows the action | operation process of 2nd Embodiment. The block diagram which shows the action | operation process of 2nd Embodiment. The block diagram which shows the action | operation process of 2nd Embodiment. The figure which shows the other form of a buffer cylinder. The perspective view of the plow apparatus for tractors by 3rd Embodiment of this invention. The side view which shows the operation | movement process of 3rd Embodiment. The side view which shows the operation | movement process of 3rd Embodiment. The perspective view which shows the modification of 3rd Embodiment of this invention. The perspective view which shows another modification by 3rd Embodiment of this invention. The side view which shows the operation | movement process of FIG. The side view which shows the operation | movement process of FIG.

Hereinafter, preferred embodiments of a plow device for a tractor according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a perspective view showing a first preferred embodiment of a plow device for a tractor according to the present invention, and FIG. 2 is a plan view showing an operation process of FIG.

As shown in FIG. 1, the plow device for a tractor according to the present invention includes a main frame 100 and a housing part 200, and a plurality of the housing parts 200 are provided, each of which includes a share 210 and a sandboard 220. Is done.

The main frame 100 is a framework that is coupled to and supported by various components, has a predetermined shape, and includes a tractor coupling portion 150 that is coupled to a tractor (not shown) and pulled forward. The main frame 100 is generally made of steel and is integrally welded with the tractor connecting portion 150. Although not shown, the tractor connecting portion 150 is connected to the rear of the tractor and serves as a connecting rod for moving the main frame 100 along with the forward movement of the tractor. The shapes of the tractor connecting part 150 and the main frame 100 differ depending on various components and the coupling relationship with the tractor.

The skeleton part 200 substantially plays the role of tilling work, that is, digging up and reversing the field soil, and as shown in FIG. 220 and disposed on the main frame 100. As shown in the figure, the housing part 200 may be composed of eight eight-plow devices. The share 210 is manufactured in a shovel shape so as to dig up the field soil, and the chopping board 220 is a blade shape added diagonally on the share 210, and the field soil that has been excavated and transferred by the share 210 is transferred. And deposit on one side. That is, the frame unit 200 accumulates the field soil that has been dug up and transferred in the direction of the shear plate 220 and the shear plate 220.

In the plow device for a tractor according to the first embodiment of the present invention, the frame part 200 is disposed in a balanced manner on the main frame 100 in order to efficiently cultivate a large-area field, and is continuous and efficient. The directionality of each of the shares 210 and the clay plates 220 of the plurality of frame parts 200 is determined so that the field soil that has been digged up and transferred so as to perform work does not accumulate only in one side direction.

That is, as shown in FIG. 1, each of the plurality of chassis parts 200 is disposed obliquely on the side surface along the longitudinal direction of the main frame 100 so that the chassis part 200 digs up the field soil. The side force generated when the transition is performed can be uniformly distributed along the longitudinal direction.

In addition, the foremost housing portion of the plurality of housing portions 200 protrudes from the front end of the main frame 100, and a shear plate 220 and a shear plate 220 are formed in a direction in which the main frame 100 is viewed. As shown in FIG. 2, the rest of the chassis parts excluding the foremost chassis part are formed with a shearing and shearing board in a direction opposite to the foremost chassis part. Thus, continuous work can be easily performed while reciprocating back and forth between the fields.

FIGS. 3 to 7 are views showing a second embodiment of the plow device for a tractor according to the present invention. FIG. 3 shows a preferred embodiment of the plow device for a tractor according to the second embodiment of the present invention. 4 is a configuration diagram showing a state in which a hydraulic line is connected to the drive cylinder and the buffer cylinder of FIG. 3, and FIGS. 5 to 7 are configuration diagrams showing an operation process. And FIG. 8 is a figure which shows the other form of a buffer cylinder.

As shown in FIGS. 3 to 7, the second embodiment of the tractor plow device according to the present invention includes hydraulic lines 400 and 410, shock absorbers in the main frame 100, the casing 200, and the drive cylinder 300 of the first embodiment. A cylinder 500 and a buffer spring 520 may be provided, and a connecting rod 530 and a guide rail 540 may be further provided.

A plurality of the housing parts 200 may be provided, and in particular, the housing part 200 may be constituted by an eight-row plow device. Depending on the number of the casings 200, when the influence of the side force is small, the casings 200 may be arranged on the main frame 100 in a left and right line, or may be arranged in a staggered manner. It may be arranged in a direction. Each housing part 200 is disposed on the main frame 100 so as to be rotatable up and down, and is constituted by a shear and a slab.

A plurality of drive cylinders 300 are provided to vertically rotate each of the housing parts 200. That is, when the plow device according to the second embodiment of the present invention is moved by the tractor, the drive cylinder 300 is operated to rotate and lift the housing part 200 upward, and during the plowing operation, the housing part 200 is rotated downward. To lower. Such a drive cylinder 300 is a hydraulic cylinder using hydraulic pressure, and is a reciprocating cylinder that reciprocates linearly for the vertical rotation of the housing part 200. The drive cylinder 300 is actuated by entering and exiting hydraulic pressure, and a pair of hydraulic lines 400 and 410 are disposed for entering and exiting hydraulic pressure.

The pair of hydraulic lines 400 and 410 provide hydraulic pressure for causing the drive cylinder 300 to reciprocate linearly as shown in FIGS. Although not shown in the drawings, a hydraulic motor, a drain, a switching valve, and the like may be provided in order to provide and discharge the hydraulic pressure through the hydraulic lines 400 and 410. The plurality of drive cylinders 300 are connected to front and rear ends of a pair of hydraulic lines 400 and 410 for rotating the housing part 200 upward and downward, respectively. As a result, the hydraulic pressure is provided from the hydraulic lines 400 and 410 to the drive cylinder 300, and as a result of the drive cylinder 300 reciprocating linearly, the housing part 200 can be rotated up and down.

As shown in FIGS. 5 to 8, the plow device for a tractor according to the second embodiment of the present invention reduces the impact when an overload occurs due to rock on any of the plurality of housing parts 200 and breaks the device. It is characterized in that both prevention and improvement of work efficiency are achieved, and this can be realized by a buffer cylinder 500 and a buffer spring 520 described later.

The buffer cylinder 500 is fixed to the main frame 100 at one end, and is slidably mounted at the other end so that the piston rod 510 can be inserted into and removed from the inside and outside. The hydraulic line 400 at the pair of front and rear ends. , 410 are shared by the front end and the rear end, respectively, and reciprocate linearly. The buffer cylinder 500 is a hydraulic cylinder as well as the drive cylinder 300 as well as the drive cylinder 300, and the hydraulic pressure is provided from the hydraulic lines 400 and 410 sharing the plurality of drive cylinders 300 and the front and rear end hydraulic lines 400 and 410. Then, it reciprocates linearly with the drive cylinder 300.

The buffer spring 520 has one end fixed to the main frame 100 and the other end connected to the tip of the piston rod 510 and expands and contracts according to the sliding operation of the piston rod. That is, the buffer spring 520 is configured to absorb or diverge the pressure transmitted to the buffer cylinder 500 by expanding and contracting during the linear reciprocation of the buffer cylinder 500.

The operation of the buffer cylinder 500 and the buffer spring 520 will be described in detail with reference to FIGS. First, as shown in FIG. 5, when hydraulic pressure is transmitted to the drive cylinder 300 via the front end hydraulic line 400 during a tilling operation, the casing portion 200 rotates downward. That is, the frame part 200 performs the tilling work in a state of being rotated downward, and the frame part 200 digs up the field soil and performs the tilling work while the plow device is pulled by the tractor. However, there is a case where rocks that cannot be found by the operator are placed in the field soil during the tilling work, and the housing part 200 performs the tilling work while being rotated downward. A rock is caught at the tip. If the skeleton part 200 is caught by a rock and cannot be lifted upward, the shear and the earthen board constituting the skeleton part 200 may be damaged. At this time, similarly to the drive cylinder 300, the buffer cylinder 500 is also supplied with hydraulic pressure from the front end hydraulic line 400 and the piston rod 510 of the buffer cylinder 500 is inserted therein, but the pressure set by the elastic force of the buffer spring 520 is set. Piston rod 510 slides in as much as it meets.

As shown in FIG. 6, the frame part 200 caught on the rock is rotated upward by the rock, and the drive cylinder 300 of the frame part 200 rotated upward is returned to the initial position while the front end hydraulic line 400. As a result, the hydraulic pressure flows back through the front end, and the front end hydraulic line 400 is overloaded. At this time, the hydraulic pressure that has flowed back is transmitted to the buffer cylinder 520 and the piston rod 510 of the buffer cylinder 500 is inserted therein, and the buffer spring 520 is compressed by the sliding operation of the piston rod 510 and absorbs excessive pressure caused by rocks.

Further, hydraulic pressure flows out to the rear end hydraulic line 410 connected to the rear end of the buffer spring 520 by the sliding operation of the piston rod 510 and flows into the rear end of the drive cylinder 300.

As shown in FIG. 7, when the frame part 200 rotated upward by the rock climbs over the rock, the excessive pressure absorbed by the buffer spring 520 is released, and thus the buffer spring 520 is being pulled. The piston rod 510 of the buffer cylinder 500 is protruded to the outside. As the piston rod 510 of the buffer cylinder 500 protrudes, the hydraulic pressure transmitted to the buffer cylinder 500 is transmitted to the drive cylinder 300 that rotates the housing part 200 that is further rotated upward via the front end hydraulic line 400. The frame part 200 rotated upward can be rotated downward to continue the tilling work.

At this time, the hydraulic pressure at the rear end of the working cylinder 300 is further transmitted to the rear end of the buffer cylinder 500 via the rear end hydraulic line 410.

The shock-absorbing cylinder 500 and the shock-absorbing spring 520 that operate as described above need only share the hydraulic lines 400 and 410 that are disposed on the main frame 100 and are simply connected to the plurality of drive cylinders 300. is there. It can apply simultaneously with respect to the whole several housing part 200. FIG. The number of the buffer springs 520 may be one or more, and the buffer springs 520 may be disposed so as to face the buffer cylinder 500. For this reason, it is necessary to arrange | position appropriately considering the installation space with the buffering force, size, and length of the buffer spring 520. For example, as shown in FIGS. 4 to 7, a pair of buffer springs 520 are provided and can be arranged parallel to the left and right of the buffer cylinder 500. In this case, a connecting rod 530 that connects the tip of the piston rod 510 of the buffer cylinder 500 and the other end of the buffer spring 520, and the main frame 100 are provided, and both ends of the connecting rod 530 are slidably guided. And a guide rail 540 to be provided. The connecting rod 530 connects the buffer spring 520 and the piston rod 510 of the buffer cylinder 500, and the guide rail 540 guides the piston rod 510 so that the piston rod 510 and the buffer spring 520 of the buffer cylinder 500 are in the longitudinal direction. It is intended for sliding and deforming only.

Such a buffer cylinder 500 is configured as shown in FIG. 8, and the external buffer spring 520 can be omitted, but by inserting a spring 550 behind the piston rod 510 inside the buffer cylinder 500. The role of the buffer spring 520 provided outside can be changed.

On the other hand, the second embodiment can be changed to various forms, but the hydraulic lines 400 and 410 and the buffer piston 500 are omitted, and the second embodiment can be operated purely by the working cylinder 300.

That is, as long as the casing 200 has a hydraulic pressure that returns to the original position after the casing 200 is rotated upward by the rock, the hydraulic pressure is not supplied from the outside by the hydraulic lines 400 and 410. In addition, the second embodiment of the present invention can be realized.

Further, when the buffer cylinder 500 is provided, the rear end hydraulic line 410 and the buffer spring 520 are omitted, and the hydraulic pressure that flows back from the working cylinder 300 via the front end hydraulic line 400 is stored in the buffer cylinder 500. Further, the hydraulic cylinder 300 can be operated by re-supplying the hydraulic pressure via the hydraulic line 400 at the front end.

At this time, the spring 550 may be incorporated in the buffer cylinder 500, but the present invention is not limited to this.

9 to 15 are views showing a third embodiment of the tractor plow device according to the present invention, and FIG. 9 is a perspective view showing the third embodiment of the tractor plow device according to the present invention. 10 and 11 are side views showing an operation process, and FIG. 12 is a perspective view showing a 3-1 embodiment of the tractor plow apparatus according to the third embodiment of the present invention. These are perspective views which show 3rd-2 embodiment of the plow apparatus for tractors by 3rd Embodiment of this invention, FIG.14 and FIG.15 is a side view which shows the operation | movement process of FIG.

As shown in FIGS. 9 to 11, the plow device for a tractor according to the present invention includes a first support link 610, a first wheel 620, A cylinder 630 may be provided, and as shown in FIGS. 12 to 15, a second support link 710, a second wheel 720, a second cylinder 730, and a connection link 800 may be further provided.

The main frame 100 and the frame unit 200 are connected to a tractor and perform tilling work by moving the tractor forward. At this time, the frame unit 200 is dug into the soil by adjusting the height of the main frame 100. The working height can be adjusted. In order to easily adjust the working height of the housing part 200, a first support link 610, a first wheel 620, and a first cylinder 630, which will be described later, are provided.

As shown in FIGS. 9 to 11, the first support link 610 is rotatably disposed on one side of the main frame 100, and the first wheel 620 is rotatable to the lower end of the first support link 610. The first cylinder 630 has one end pin-coupled to the main frame 100 and the other end pin-coupled to the upper end of the first support link 610 to rotate the first support link 610. That is, the main frame 100 is supported while being separated from the field by the first wheels 620 that are rotatably coupled to the lower end of the first support link 610, and the working depth of the frame unit 200 is determined according to the separation height of the main frame 100. Is determined. For this reason, the separation height of the main frame 100 can be adjusted by raising and lowering the first wheel 620, and as a result, the working depth of the housing part 200 is also adjusted. At this time, the first support link 610 is rotatably coupled to the main frame 100, and the first support link 310 is rotated by driving the first cylinder 630 pin-coupled to the upper end of the first support link 610. Can be made. When the first support link 610 is rotated by driving the first cylinder 630, the first wheel 620 that is rotatably coupled to the lower end of the first support link 610 is raised and lowered with respect to the main frame 100.

As shown in FIG. 12, the tractor plow apparatus according to the present invention may further include a second support link 710, a second wheel 720, and a second cylinder 730. That is, the height of the main frame 100 can be adjusted separately on one side and the other side, and the working depth of the frame unit 200 is made different according to the inclination of the field and the state of the soil. Can do. At this time, the first support link 710 is rotatably disposed on the other side of the main frame 100, the second wheel 720 is rotatably provided at the lower end of the second support link 710, and the second cylinder 730. One end is pin-coupled to the main frame 100 and the other end is pin-coupled to the upper end of the second support link 710 to rotate the second support link 710. The configuration and operation of the second support link 710, the second wheel 720, and the second cylinder 730 are the same as the first support link 610, the first wheel 620, the first cylinder 630, and one side and the other side of the main frame 100. Since it is the same except for having been arrange | positioned, the detailed description is abbreviate | omitted.

On the other hand, as shown in FIGS. 13 to 15, the second cylinder 730 is omitted, and only the first cylinder 630 is driven via the connection link 800 that connects the first support link 610 and the upper end of the second support link 610. The first support link 610 and the second support link 710 may be rotated to move the first wheel 620 and the second wheel 720 together. That is, the first support link 610 is rotated by driving the first cylinder 630, and the rotational force is transmitted to the connection link 800 connected to the first support link 610, and the second support link 710 is also rotated. At this time, the first wheel 620 disposed at the lower end of the first support link 610 and the second wheel 720 disposed at the lower end of the second support link 710 are lifted and lowered so that the overall height of the main frame 100 is the same. Is adjustable. That is, one end of the connection link 800 is pin-coupled to the upper end of the first support link 610, and the other end is pin-coupled to the upper end of the second support link 710. Two support links 710 can be connected and rotated together.

The plow device for a tractor of the present invention according to the third embodiment is particularly suitable for plowing work on a flat field with a large area.

DESCRIPTION OF SYMBOLS 100: Main frame 150: Tractor connection part 200: Housing part 210: Shear 220: Pile plate 300: Drive cylinder 400: Hydraulic line 500: Buffer cylinder 510: Piston rod 520: Buffer spring 530: Connection rod 540: Guide Rail 610: first support link 620: first wheel 630: first cylinder 710: second support link 720: second wheel 730: second cylinder 800: connection link

Claims (11)

A plow apparatus for a tractor comprising: a main frame having a tractor connecting portion that is connected to the tractor to be pulled forward; and a plurality of housing portions that are disposed on the main frame and have shear plates. In
The main frame extends in the advancing direction of the tractor and includes a first main frame in which the connecting portion is disposed, a second main frame disposed at a right angle to an end of the first main frame, and the first main frame. In order to connect the end portion of the frame and the end portion of the second main frame, it has a planar shape of a right triangle made of a third main frame disposed obliquely with respect to the traveling direction, and A fourth main frame arranged in parallel with one main frame and connecting the second main frame and the third main frame;
Each of the plurality of housing parts is disposed along the third main frame and is arranged obliquely with respect to the traveling direction, and the foremost housing part among the plurality of housing parts is the first body part . 3 is protruded from the main frame and a shear board is formed in the direction of viewing the main frame ,
A plow device for a tractor , comprising: a plurality of drive cylinders, wherein the housing portion is rotatably disposed on the main frame, and each of the housing portions is rotated up and down .   Of the plurality of chassis parts, the remaining chassis part excluding the foremost chassis part is formed with a shear and earth plate in a direction opposite to the foremost chassis part. The plow device for a tractor according to claim 1. One end is fixed to the main frame, and the other end is slidably mounted so that the piston rod can be inserted and removed, and the drive cylinder and the buffer cylinder are connected to move the hydraulic pressure. plow device for tractor according to claim 1 or 2, characterized in that it comprises a hydraulic line, a. 4. The shock absorber according to claim 3 , further comprising a buffer spring having one end fixed to the main frame and the other end connected to a tip of the piston rod and extending and contracting in accordance with a slide operation of the piston rod. Plow device for tractors. 5. The plow device for a tractor according to claim 4 , wherein a pair of the buffer springs are provided and are arranged in parallel to the left and right of the buffer cylinder. The plow device for a tractor according to claim 5 , further comprising a connecting rod that connects a tip end of a piston rod of the buffer cylinder and the other end of the buffer spring. The plow device for a tractor according to claim 6 , further comprising a guide rail disposed on the main frame and slidably guiding both ends of the connecting rod. The tractor plow device according to claim 4 , wherein a spring is provided inside the buffer cylinder. A plow apparatus for a tractor comprising: a main frame having a tractor connecting portion that is connected to the tractor to be pulled forward; and a plurality of housing portions that are disposed on the main frame and have shear plates. In
The main frame extends in the advancing direction of the tractor and includes a first main frame in which the connecting portion is disposed, a second main frame disposed at a right angle to an end of the first main frame, and the first main frame. In order to connect the end portion of the frame and the end portion of the second main frame, it has a planar shape of a right triangle made of a third main frame disposed obliquely with respect to the traveling direction, and A fourth main frame arranged in parallel with one main frame and connecting the second main frame and the third main frame;
Each of the plurality of housing parts is disposed along the third main frame and is arranged obliquely with respect to the traveling direction, and the foremost housing part among the plurality of housing parts is the first body part . 3 is protruded from the main frame and a shear board is formed in the direction of viewing the main frame ,
A first support link rotatably disposed on the first main frame of the main frame, a first wheel rotatably disposed on a lower end of the first support link, and one end of the first support link And a first cylinder that is hinged to the first main frame of the frame and whose other end is hinged to the upper end of the first support link to rotate the first support link. Plow device for tractors. A second support link rotatably disposed on the fourth main frame; a second wheel rotatably disposed on a lower end of the second support link; and one end of the second main link on the fourth main frame. The tractor according to claim 9 , further comprising: a second cylinder that is pin-coupled and whose other end is pin-coupled to an upper end of the second support link to rotate the second support link. Plow equipment. A second support link rotatably disposed on the fourth main frame; a second wheel rotatably disposed on a lower end of the second support link; and one end of the first support link. The plow device for a tractor according to claim 9 , further comprising a connection link that is pin-coupled to an upper end and has a second end that is pin-coupled to an upper end of the second support link.