WO2024019236A1

WO2024019236A1 - Automatically expanding agricultural implement

Info

Publication number: WO2024019236A1
Application number: PCT/KR2022/019048
Authority: WO
Inventors: 김중호
Original assignee: 김중호
Priority date: 2022-07-20
Filing date: 2022-11-29
Publication date: 2024-01-25
Also published as: KR102634561B1; KR20240011967A

Abstract

The present invention relates to an automatically expanding agricultural implement, which is an automatically expanding agricultural implement connected to and mounted on a farm tractor so as to enable transmission of power, comprising: a main shaft, formed in the central portion thereof, rotated by receiving the power of the farm tractor; a blade shaft that is coupled to both sides of the main shaft so as to move in the axial direction and is drawn out from the main shaft to be expanded or drawn in to be contracted while rotating along with the main shaft to perform plowing work; a hydraulic means that moves the blade shaft from the main shaft; and a back plate that covers the main shaft and the blade shaft while being moved along with the blade shaft by means of the hydraulic means so as to be expanded or contracted.

Description

Automatically expandable agricultural implements

The present invention relates to an automatically expandable agricultural work machine, and more specifically, to an automatically expandable agricultural work machine that is connected to and towed by an agricultural tractor and automatically expands the work area according to the performance of the agricultural tractor. .

In general, a Rotavator, one of agricultural work machines, is an agricultural machine used to till the land for sowing or transplanting crops.

In other words, the rotavator is mounted on a farm tractor, an agricultural work vehicle, and rotates a plurality of tillage blades provided on the blade shaft that receive power from the tractor's engine, tilling farmland to an appropriate depth for sowing or transplanting crops. will be.

This rotavator has been proposed in Korea Registered Utility Model No. 20-0492282 (hereinafter referred to as 'prior art document').

The conventional rotavator disclosed in the prior art literature includes a power transmission unit through which the power of the tractor is transmitted in the upper central area, a main body with both ends finished with respective side plates, and two sides installed between the power transmission unit and both side plates. A gear coupling shaft that is rotatably provided with one end connected to the support frame and the power transmission unit and the other end penetrating the left side plate through one support frame, that is, the left support frame, is coupled and fixed to the left end of the gear coupling shaft. A gearbox is composed of a first sprocket wheel that rotates in a fixed state and a second sprocket wheel that is connected to a chain and rotates in a fixed state coupled to a knife shaft.

At this time, a plurality of tillage blades are installed in a coupled and fixed state on the knife axis, and are rotated by the knife axis to till the farmland to an appropriate depth.

In other words, when the power of the tractor is transmitted to the power transmission unit, the power is transmitted to the gear coupling shaft connected to the power transmission unit, causing the gear coupling shaft to rotate within the support frame, and the first sprocket wheel coupled and fixed to the gear coupling shaft As it rotates with the gear coupling shaft, the second sprocket wheel connected to the chain rotates, and as the knife shaft rotates due to the rotation of the second sprocket wheel, a plurality of tillage blades till the farmland.

However, since the conventional rotavator is manufactured with a knife axis of a certain length according to specifications, the rotatorvator towed by an agricultural tractor always plows only a certain width of farmland regardless of the performance of the tractor, so the working width is limited. There is a disadvantage that workability is inefficient compared to the performance of the tractor.

(patent literature)

Republic of Korea Registered Utility Model No. 20-0492282

Therefore, the present invention was devised to solve the problems of the prior art as described above, and is configured to automatically expand and contract the length of the agricultural implement according to the performance of the agricultural tractor, thereby adjusting the work area of the agricultural implement to the performance of the agricultural tractor. The purpose is to provide an automatically expandable agricultural implement that can be expanded or reduced depending on the size.

The automatically extendable agricultural work machine according to the present invention for achieving the above-described purpose is an automatically expandable agricultural work machine that is connected and mounted to enable power transmission to an agricultural tractor. The agricultural work machine has a main shaft that is rotated by receiving power from the tractor at its center. It is provided on both sides of the main shaft with a knife axis that is coupled to move in the axial direction and is pulled out and expanded from the main axis or retracted and contracted, and rotates with the main axis to perform a tilling operation. Hydraulic means for moving the knife axis from the main axis are provided. It is characterized in that it is provided with a back plate that covers the main axis and the knife axis while being moved together with the knife axis by hydraulic means for moving the knife axis and expanding or contracting.

In addition, the back panel includes a central back panel that is provided on the upper part of the main axis and covers the main axis, and side back boards that are movably coupled to each side of the central back board and are provided to expand or contract from the central back board, and the side back boards are operated by hydraulic means. It may be provided to move along with the knife axis.

In addition, the side light panel may be further provided with a connecting plate that connects the side light panel to the knife axis so that the side light panel and the knife axis are moved simultaneously by hydraulic means.

In addition, the connecting plate is fixed to the side back plate, and the knife axis is rotatable on the connecting plate. The knife axis is provided with an end block that finishes the inside of the knife axis, and the connecting plate has a seal on the end block protruding from the knife axis. A bearing housing is provided that is coupled to the bearing, and a bearing is provided between the bearing housing and the end block to allow the end block to rotate with the knife axis. The bearing housing has a bearing housing that blocks exposure of the bearing and the end block while supplying lubricant to the bearing. A cap nut having a work tool may be provided in combination.

In addition, the hydraulic means includes a slide tube fixed to the center back plate; A plurality of slide pipes are each fixed to both side lights and are provided to enter and exit the slide pipe, and a port through which hydraulic pressure enters and exits is formed on one side; It is fixed in a state that penetrates the slide pipe, and both ends are inserted into and moveable in both slide pipes. It includes a connecting rod that has ports through which hydraulic pressure enters and exits on both sides, and hydraulic pressure is supplied to the port of the slide pipe on one side. Accordingly, the connecting rod and both slide tubes may be provided to extend and expand.

In addition, the knife axis includes a fixed knife axis fixed to the main axis, and a movable knife axis movable from the main axis, and between the fixed knife axis and the movable knife axis, the length of the knife axis is extended or shortened as the movable knife axis moves to prevent foreign matter from wrapping. A bar may be provided.

In addition, the fixed knife shaft between the two foreign material prevention bars may be provided with a lug bar that rotates with the shaft to remove foreign materials and prevent foreign materials from becoming entangled in the shaft.

Additionally, the knife axis moving from the main axis may be maintained in a state where it overlaps the main axis by more than 40%.

Additionally, a shock absorber may be provided between the agricultural implement and the tractor to cushion the implement being rolled by the tractor, and a connecting link may be provided between the agricultural implement and the tractor to prevent the agricultural implement from moving back and forth when it is rolled.

According to the automatically expandable agricultural working machine of the present invention, the working area of the agricultural operating machine connected to and towed by the agricultural tractor is provided to automatically expand and contract according to the performance of the agricultural tractor, thereby expanding the working area of the agricultural working machine according to the performance of the agricultural tractor. Alternatively, it can be reduced to allow quick and efficient work to be done.

Figure 1 is a diagram showing a rotavator as an example of an agricultural work tool according to the present invention.

Figure 2 is a front cross-sectional diagram showing the expansion and contraction structure of the rotavator according to the present invention.

FIG. 3A is an enlarged view of part A of FIG. 2, and FIG. 3b is an enlarged view of part B of FIG. 3a.

Figure 4 is an enlarged view of part C of Figure 2.

Figure 5 is an exploded view of the rotavator according to the present invention.

Figure 6 is a cross-sectional configuration diagram of the cylinder means configured on the back plate of the rotavator according to the present invention.

Figures 7 and 8 are views showing the rotavator according to the present invention in an expanded state and a collapsed state, respectively.

Figure 9 is a side configuration diagram showing a central drive type driving unit for driving the rotavator according to the present invention.

Figure 10 is a diagram showing the shock absorber and connecting link configured between the rotavator and the mounting box according to the present invention.

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

The terms used in the present invention are terms defined in consideration of the functions in the present invention, and may vary depending on the intention or custom of the user or operator, so the definitions of these terms are defined in accordance with the technical details of the present invention. It should be interpreted as a concept.

In addition, the embodiments of the present invention do not limit the scope of the present invention, but are merely illustrative of the components presented in the claims of the present invention, and are included in the technical idea throughout the specification of the present invention and are included in the claims. This is an embodiment that includes components that can be replaced as equivalents in the components.

Additionally, optional terms in the examples below are used to distinguish one component from another component, and the components are not limited by the terms.

Accordingly, when describing the present invention, detailed descriptions of related known technologies that may unnecessarily obscure the gist of the present invention are omitted.

1 to 10 are diagrams showing a centrally driven rotavator and the variable structure of the rotavator as an example of an automatically extendable agricultural work machine according to the present invention.

As shown in the drawing, the automatically extendable agricultural implement according to the present invention is connected and mounted to the rear of the agricultural tractor to enable power transmission.

Here, agricultural work machines include harvesters, rotavators, plows, seeders, mowing machines, mulching machines, trailers, balers, and compost spreaders. However, in this embodiment, the rotavator 100 is exemplified as an example of agricultural work machines as shown in the drawing. Let me explain.

In addition, the agricultural work vehicle on which the rotavator 100 is mounted will be described by taking an agricultural tractor as an example.

Meanwhile, the rotavator 100 as described above is provided by being connected to a detachable part 200 mounted on the rear of a tractor (not shown), as shown in FIG.

As shown in FIGS. 2 to 5, the rotator 100 is equipped with a gearbox 110 in the center that is driven by receiving power from the tractor, and the rotator 100 is driven based on the gearbox 110. ) is provided so that the left and right sides are balanced.

In particular, a hollow main shaft 111 penetrates the lower part of the gearbox 110 and is provided to protrude on both sides of the gearbox 110, and a hollow knife shaft 150 is provided on both sides of the main shaft 111 ( 150a), as shown in FIG. 4, is formed in a square shape or other polygonal shape and is joined by shape fitting so that relative rotation is not possible.

In addition, the upper part of the gearbox 110 is provided with a back panel whose length is adjusted according to the length of the knife axis 150 (150a), which is expanded or contracted by moving from the main axis 111, and the back panel includes a central back panel 160 and a side back panel. It is provided including (170).

First, the knife axis 150 (150a) provided on the main axis 111 includes a movable knife axis 150 that slides in the axial direction of the main axis 111 and a fixed knife axis 150a that is coupled and fixed to the main body 111. In addition, both

knife axes

150 and 150a are coupled to the main shaft 111 in a polygonal shape.

These

knife shafts

150 and 150a are provided with a plurality of tillage blades 151 installed at regular intervals for tillage work.

In particular, the movable knife axis 150 is provided to slide and protrude while being shape-fittedly coupled to the main axis 111, and the main axis 111 is provided with hydraulic means for sliding and moving the movable knife axis 150 on the main axis 111. It is provided.

This hydraulic means slides and moves the movable knife axis 150 on the main axis 111, while simultaneously sliding and moving the side back panel 170 along with the movable knife axis 150 on the central back plate 160, which will be described later. This will be explained in detail in the description of the back plate that will be described later.

On the other hand, as shown in FIG. 2, the fixed knife shaft (150a) among the above knife axes has a bracket (hereinafter collectively referred to as "fixed knife shaft") for mounting the tilling blade 151 on the fixed knife shaft (150a) at the center side. That is, a lug bar 152 is provided that protrudes toward the gearbox 110 and rotates with the fixed knife shaft 150a to remove weeds from the soil being tilled and prevent the weeds from being wrapped around the shaft.

This lug bar (152) is provided to protrude in the axial direction between the shaft and the tilling blade (151) and can prevent weeds from being wrapped around the shaft by removing weeds dug up from the soil by the tilling blade (151). There will be.

And, as described above, both lug bars 152 located on both sides of the gearbox 110 with the gearbox 110 in between may be provided symmetrically at 180 degrees. That is, if both lug bars 152 are provided symmetrically by 180 degrees with respect to the gearbox 110, balance can be maintained when the main shaft 111 rotates, and if the balance of the main shaft 111 is maintained, vibration and operating noise are reduced. It is possible to reduce the occurrence of.

In addition, both lug bars 152 have front ends protruding toward the gearbox 110 from both sides of the gearbox 110 inclined in the outer direction of the fixed knife shaft 150a, which is formed by the lug bar 152. The removed weeds are wound around the lug bar 152. At this time, the removed weeds are moved to the outer end (fixed end) of the lug bar 152, which is far away from the gearbox 110.

As a result, even if the weeds removed by the lug bar 152 are wrapped around the lug bar 152, it is possible to prevent the weeds from being wrapped around and entangled in the gearbox 110 and its output stage, thereby preventing malfunction. do.

In addition, a foreign matter wrapping prevention bar 153 is further provided between the fixed knife axis 150a and the movable knife axis 150, the length of which increases or decreases as the movable knife axis 150 moves.

As shown in FIGS. 7 and 8, the foreign matter wrapping prevention bar 153 is provided by combining multi-stage bars with different diameters in a telescopic structure, so that foreign matter such as weeds can be moved by rotating and stretching together with the knife axis 150 (150a). It is possible to prevent winding around the knife axis 150 and the main axis 111 in advance.

Like the lug bar 152, the foreign matter prevention bar 153 can also be provided symmetrically at 180 degrees on both sides of the gearbox 110, and the effect of this is that the lug bar 152 and Since it has the same effect, it is replaced with the explanation of the lug bar 152.

In addition, as described above, the movable knife axis 150 that protrudes and extends from the main axis 111 is preferably provided in a state that overlaps the main axis 111 by more than 40%, and in this area, covering or using the extended knife axis 150 Since clearance that may occur between the movable knife shaft 150 and the main shaft 111 can be eliminated during rotary work such as tilling, work can be performed stably.

Meanwhile, as shown in FIGS. 3A and 3B, the main shaft 111 connected to both sides of the gearbox 110 is provided with a sealing portion to block leakage of oil for lubrication.

This sealing part is provided in the gearbox cover 130 formed of a hollow cylinder that is respectively coupled and fixed to both sides of the gearbox 110, and the gearbox cover 130 and the main shaft 111 are located at the outer end of the gearbox cover 130. ) A support plate 131 is provided to cover the sealing portion provided between the two.

This support plate 131 covers the gap between the outer end of the gear box cover 130 and the main shaft 111, and is bolted to and fixed to the bearing fixing member 133 of the sealing portion, which will be described later.

As a result, a space is provided between the gearbox cover 130 and the main shaft 111 by the gearbox cover 130 and the support plate 131, and sealing parts are installed at both ends of this space.

As shown in Figure 3b, the sealing part is provided on the bearing 132 provided inside the space spaced apart from the gearbox cover 130 and the main shaft 111, and on the outside of the space spaced apart from the bearing 132. A bearing fixing member 133 that supports and fixes the bearing 132 with one end in contact with the bearing 132, a group seal 134 provided between the bearing fixing member 133 and the bearing 132 to maintain airtightness, and , It includes a group seal support member 135 that is provided between the group seal 134 and the bearing 132 and supports the group seal 134.

The bearing 132 is a typical ball bearing with a plurality of balls rolling between the inner ring and the outer ring. The inner ring of the bearing 132, which is coupled and fixed on the outer circumference of the main shaft 111, supports the outer peripheral surface of the main shaft 111. It is provided to rotate with the main shaft 111, and the outer ring of the bearing 132 is supported in contact with the inner surface of the gearbox cover 130.

The bearing fixing member 133 is a ring-shaped sealing member provided with an O-ring 136 interposed on the inner peripheral surface in contact with the main shaft 111 and the outer peripheral surface in contact with the inner surface of the gearbox cover 130, and a support plate ( Bolts for fastening the support plate 131 are fastened to the outer surface opposite to 131).

The group seal 134 is a ring-shaped sealing material whose cross-section is formed in the shape of an "ㅗ" shape, and the partition wall protruding vertically from its center is located between the bearing fixing member 133 and the group seal support member 135 for sealing. It is provided. This group seal 134 is also provided with an O-ring 136 interposed on one surface in contact with the bearing fixing member 133 and the group seal support member 135 to be sealed.

Therefore, the bearing 132 provided between the gearbox cover 130 and the main shaft 111 is not only firmly kept airtight by the group seal 134 and the group seal support member 135, but also the bearing fixing member 133. ) and the support plate 131, so that the position can be maintained in the correct position.

Meanwhile, along with the

knife shafts

150 and 150a that are expanded as described above, the back panel and the door panel are also provided to be expanded (extended) as shown in FIGS. 1 and 5.

For this purpose, a central light plate 160 is fixedly provided on the upper part of the gear box 110, and a central door panel 180 is hingedly provided at the rear end of the central light plate 160, and is provided on both sides of the central light plate 160. Each part is provided with a side light panel 170 that is slidably coupled to expand or contract from the central light panel 160, and a side door panel 190 is hinged to the rear end of the side light panel 170 to form a side light panel 170. It is provided to move as follows, and hydraulic means is provided to expand or contract the side back panel 170 by sliding it on the central back panel 160.

The central light plate 160 protrudes from the upper part of the gearbox 110 to both sides and is provided in a covered state to cover the gearbox 110, and the side light plates 170 are located on both sides of the central light plate 160 in the axial direction ( It is provided to be able to slide in the longitudinal direction. These side lights 170 are provided to move simultaneously on both sides of the central light plate 160 by hydraulic means, and when the side light plates 170 are reduced, the side lights 170 are inserted into the lower part of the central light plate 160 and overlap. It is provided in ready-made condition.

In addition, the hydraulic means for moving the side lights 170 from the central light plate 160 are respectively fixed to the slide pipe 161 fixed to the central light plate 160 and both side lights 170, while the slide pipes ( A plurality of slide main pipes 171 are provided to enter and exit 161 and are formed with a port 171a through which hydraulic pressure enters and exits on one side, and are fixed in a state penetrating the slide main pipe 161, while both ends are connected to both slide main pipes ( 171), and includes a connecting rod 173 that is provided to be moved and has

ports

173a and 173b through which hydraulic pressure enters and exits, respectively, on both sides, and hydraulic pressure is supplied to the port 171a of the slide pipe 171 on one side. As it is supplied, the connecting rod 173 and both slide tubes 171 are provided to be extended and expanded.

The slide main tube 161 is a hollow tube and is installed on the upper surface of the central back panel 160 in the longitudinal direction of the central back panel 160, that is, in the left and right directions, and the corresponding slide main tube 171 is also a hollow tube and the side back panel 170 ) is installed on the upper surface of the side light panel 170 in the left and right directions. This slide main tube 171 is provided with an outer diameter that can be inserted into and out of the slide main tube 161.

In addition, one port (171a) through which hydraulic pressure enters and exits is formed in the slide pipe (171) on one side of the two slide pipes, as shown in FIG. 6, and inside the slide pipe (171) on one side where the port (171a) is located, A stopper 172 is formed to protrude in contact with the connecting rod 173 to stop movement between the slide tube 171 and the connecting rod 173.

At this time, the port 171a of the slide main tube 171 is provided at a position corresponding to the distal end of the stopper 172, so that when the slide main tube 171 and the connecting rod 173 are reduced and moved, the connecting rod 173 is connected to the stopper 172. Because it comes into contact with, the connecting rod 173 does not pass through the port 171a of the slide pipe 171.

Meanwhile, the connecting rod 173 is also provided as a hollow tube with an empty interior, and pistons 174 closing the openings of the connecting rod 173 are fixed to each other at both ends, and both pistons 174 have both slides. It is provided to be moved while being inserted into each main pipe 171.

In addition, first and

second ports

173a and 173b through which hydraulic pressure enters and exits are formed on the connecting rod 173 in front of the piston 174, respectively. Accordingly, when hydraulic pressure is supplied to the first port 173a (the left port with respect to FIG. 6), both slide tubes 171 on both sides of the connecting rod 173 are moved toward the center and reduced, and the second port 173b ) (right port in Figure 6) when hydraulic pressure is supplied, both slide tubes 171 are drawn outward from both sides of the connecting rod 173 and expanded.

The hydraulic means operated in this way is provided so that the slide pipes 171 on both sides move simultaneously on one connecting rod 173 provided through the slide pipe 161, thereby simplifying the structure of the hydraulic means and providing a central back plate ( In 160), both side lights 170 are moved simultaneously, making it possible to precisely control the expansion or contraction operation.

In addition, the

back panels

160 and 170 as described above are provided with doors that cover and cover the rear of the rotator 100, and at the rear end of the central back panel 160, the central door panel 180 is positioned at right angles downward. It is hinged so that it can be rotated, and the side door panel 190 is provided at the rear end of the side light panel 170 by being hinged so that it can be rotated in a downward orthogonal state.

As such, the central door panel 180 and the side door panel 190 are moved together with the

back panel

160 and 170 to expand or contract, respectively, and both side door panels 190 are inserted into the central door panel 180 to allow entry and exit. It is provided. Accordingly, the

door panels

180 and 190, like the upper central back panel 160 and the side back panel 170, are provided to be expanded or contracted by adjusting their length.

Meanwhile, the side back panel 170, which is moved from the central back panel 160 by hydraulic means, is provided to move simultaneously with the movable knife axis 150.

For this purpose, the side light plate 170 is provided with a connecting plate 175 that connects the side light plate 170 to the outer end of the movable knife shaft 150, and the side light plate 170 and the movable knife shaft 150 are connected by this connecting plate 175. The knife axis 150 is integrated and moves simultaneously to expand or contract.

This connection plate 175 is fixed to the side light plate 170, and the movable knife axis 150 is rotatably coupled to the connection plate 175.

In this way, if the coupling structure between the movable knife shaft 150 and the connecting plate 175 is described in detail, as shown in Figures 2 and 4, the outer end of the movable knife shaft 150 has an inner part of the movable knife shaft 150. A finishing end block 154 is provided, and the connection plate 175 is provided with a bearing housing 176 that is sealed and coupled to the end block 154 protruding from the movable knife shaft 150. The bearing housing 176 and A bearing 177 is provided between the end blocks 154 to allow the end block 154 to rotate with the movable knife axis 150, and the bearing 177 and the end block 154 are exposed in the bearing housing 176. A cap nut 179 is provided coupled with a work tool 179a that can supply lubricant to the bearing 177 while blocking it.

The end block 154 is inserted into the outer end of the movable knife shaft 150 and has a finishing portion 154a that closes the opening of the movable knife shaft 150, and is formed to protrude from the finishing portion 154a to form an outer end of the movable knife shaft 150. It includes a protrusion 154b provided to protrude.

The finishing portion 154a of the end block 154 is fixed by welding while inserted into the movable knife shaft 150, and the protrusion 154b is provided to protrude to the outside of the movable knife shaft 150. The protrusion 154b A sealing groove 155 for sealing is formed between the and the finishing portion 154a and is recessed toward the finishing portion 154a.

This sealing groove 155 is provided with a group seal 156. One end of the group seal 156 is inserted into the sealing groove 155, and the other end is connected to the bearing housing 176 and the end block 154. It is provided by being inserted between the protrusions 154b.

This group seal 156 is a ring-shaped sealing material whose cross-section is formed in a "ㅗ" shape, and the partition wall protruding vertically from the center is between the finishing portion 154a of the end block 154 and the bearing housing 176. It is located and sealed.

In addition, O-rings 157 are provided on both sides of the center of the group seal 156 to contact and seal the finish portion 154a of the end block 154 and the bearing housing 176, respectively.

In addition, the bearing housing 176 is formed of a hollow tube with its interior penetrated, and the inside of the bearing housing 176 is stepped so that one end coupled to the finishing portion 154a of the end block 154 has a narrowing inner diameter. It is formed, and a bearing 177 is provided in contact with its stepped portion 176a.

At this time, the bearing 177 is a normal ball bearing with a plurality of balls rolling between the inner ring and the outer ring. The inner ring of the bearing 177 is fixed to the outer peripheral surface of the protrusion 154b of the end block 154, and the bearing ( The outer ring of 177) is inserted and fixed to the inner peripheral surface of the bearing housing 176, so that the end block 154 is rotatable within the bearing housing 176 by the bearing 177.

This bearing 177 is provided to be fixed in position by a lock nut 178 composed of a plurality of nuts each fastened to the protrusion 154b of the end block 154.

The cap nut 179 is coupled to the outer end of the bearing housing 176 to block exposure of the bearing 177 and the lock nut 178 within the bearing housing 176.

At this time, a plurality of work tools 179a are formed through the surface of the cap nut 179, that is, the outer surface, and the work tools 179a formed in this way can be combined with tools for mounting and detaching the cap nut 179. On the other hand, lubricant may be injected and supplied to the bearing 177 through the work tool 179a.

Meanwhile, the gearbox 110 is equipped with a power transmission unit 120 that is connected to the power transmission unit of the detachable unit 200 and inputs the power of the tractor. The power transmission unit 120 is connected to the power transmission unit of the detachable unit 200. It can be provided to be combined with the power transmission unit and a dog clutch structure to transmit power.

In addition, as shown in FIG. 9, the power transmission unit 120 is provided with an input shaft 121 that protrudes toward the detachable part 200 of the tractor, and a dog clutch on one side is installed at the front end of the protruding input shaft 121. It is provided to be fixed, and a first sprocket wheel 124 is connected to the rear end of the input shaft 121 to enable power transmission.

This first sprocket wheel 124 is connected to the second sprocket wheel 112 of the main shaft 111, which will be described later, via a chain 125 to enable power transmission.

In addition, a main shaft 111 is provided at the lower part of the gearbox 110 to protrude on both sides of the gearbox 110, and a second sprocket wheel 112 is fixedly provided at the outer center of the main shaft 111. 2 The sprocket wheel 112 and the main shaft 111 are provided to rotate simultaneously.

As a result, the power of the tractor is input to the input shaft 121 through the power transmission unit 120, and the input power is transmitted to the main shaft ( 111) and output.

Meanwhile, as the gearbox 110 is provided in the center of the rotavator 100 as described above, uncultivated land exists in the farmland below the gearbox 110 as much as the width of the gearbox 110.

Accordingly, the lower end of the gearbox 110 is provided with a plow protrusion 110a protruding downward as shown in FIG. 9, and the plow protrusion 110a excavates uncultivated land corresponding to the width of the gearbox 110. .

In particular, during the tilling operation of the rotavator 100, the tilling operation of the tilling blade 151 rotated on both sides of the gearbox 110 moves to the lower center of the rotavator 100, that is, the lower part of the gearbox 110. Soil from excavated farmland may accumulate, and the plow protrusions (110a) disperse the accumulated soil to both sides and simultaneously remove weeds from uncultivated land.

As shown in FIGS. 1 and 5, a mounting box 126 is provided in a hinged manner on the upper part of the gear box 110.

This mounting box 126 has a cover part 126a that covers the upper surface of the gearbox 110, that is, the power transmission part 120, and one end of the cover part 126a close to the detachable part 200 of the tractor. It includes an extended “∧” shaped extension portion 126b.

Mounting pins (not shown) on which the hooks of the upper and lower links of the detachable part 200 are respectively engaged are fixed to the cover part 126a and the extension part 126b, and among the mounting pins, the upper mounting pin is It is formed to be fixed to the upper surface of the cover part 126a and is coupled to the upper hook of the detachable part 200, and the lower mounting pin is formed to be fixed to the lower end of both extension parts 126b and is attached to the lower hook of the detachable part 200. is provided to be combined.

Meanwhile, between the above-mentioned mounting box 126 and the rotavator 100, a plurality of shock absorbers 140 are provided on both sides to cushion the rolling of the rotavator 100.

As shown in FIG. 10, the shock absorber 140 includes a cylinder body 140a on which hydraulic pressure acts, and a rod 140b that is provided to be inserted and exited from one end of the cylinder body 140a.

The lower end of the cylinder body 140a is hinged to the lower end of the extension part 126b of the mounting box 126, and the tip (upper end) of the rod 140b that enters and exits the upper end of the cylinder body 140a is a gearbox. It is hinged to the slide pipe 161 of (110).

Therefore, when both ends of the rotator 100 are rolled up and down in the mounting box 126, the rods 140b on both sides, which roll up and down like the rotator 100, enter and exit each cylinder body 140a, providing cushioning. It works.

Meanwhile, in this embodiment, in constructing the shock absorber 140, the cylinder body 140a is positioned at the bottom and coupled to the bottom of the extension portion 126b of the mounting box 126, and the rod 140b is positioned at the top. A structure coupled to the slide tube 161 of the gearbox 110 is illustrated, which is to prevent damage to the rod 140b by foreign substances flying upward during farmland tillage work, and the rod 140b is installed in the cylinder body ( It is located at the upper part of 140a), and damage to the rod 140b is prevented, thereby preventing malfunction of the shock absorber 140.

In addition, the rear side of the extension part 126b of the mounting box 126 (the side facing the rotavator 100) blocks foreign substances splashing toward the shock absorber 140 during the tilling operation by the rotavator 100, thereby protecting the rear surface from foreign substances. A guard 141 is provided to protect the shock absorber 140.

At this time, the guard 141 is not only formed as a plate having an area that sufficiently covers the rear of the shock absorber 140, but may also be provided at an angle corresponding to the inclination of the shock absorber 140. In this way, if the guard 141 is provided at an angle corresponding to the shock absorber 140, the area that can cover the shock absorber 140 is secured to the maximum compared to the same area, so the shock absorber 140 can be protected more safely. There will be.

Additionally, a connecting link 142 is provided between the extension portion 126b of the mounting box 126 and the central back plate 160 to prevent the rotator 100 from rocking back and forth when it is rolled.

As shown in FIG. 10, one end of the connecting link 142 is hinged to the extension portion 126b of the mounting box 126, and the other end is hinged to the upper surface of the central back plate 160. In addition, a bent portion 142a is formed on one side of the connecting link 142 to avoid interference with the slide pipe 161 provided on the upper surface of the central light plate 160.

As a result, when both sides of the rotavator 100 are rolled up and down in the detachable part 200 by the connecting link 142, the rotation (swing) of the rotavator 100 in the forward and backward directions is blocked, allowing the rotator 100 to be used for tilling farmland. Since the rotavator 100 rolls in place only in the up and down directions according to the smoothness of the farmland, all farmland can be tilled without exception.

The rotavator 100 according to the present invention as described above receives the power of the tractor through the power transmission unit 120 coupled to the power transmission unit of the tractor.

As shown in FIG. 9, the power transmitted in this way is input to the input shaft 121 of the power transmission unit 120 formed on the upper part of the gearbox 110, and the input power is connected to the input shaft 121 and the first sprocket wheel ( 124), and the power transmitted to the second sprocket wheel 112 is output through the main shaft 111 provided on both sides of the second sprocket wheel 112.

In this way, the power output to the main axis 111 rotates the main axis 111, and the rotation of the main axis 111 causes the knife axis 150 (150a), which is coupled to the shape of the main axis 111, to rotate simultaneously, and the knife axis 150 As (150a) rotates, the tillage blades (151) fixed thereto are rotated as one unit to excavate and till the farmland.

In particular, the length, or width, of the tillage blade 151 for tilling farmland can be expanded or reduced depending on the performance of the tractor.

That is, when the performance of the tractor to which the rotavator 100 is connected is high output, the movable knife axis 150 is pulled out and expanded from the main axis 111 as shown in FIG. 7, and at the same time, the side light plate 170 connected to the movable knife axis 150 ) is also drawn out and expanded from the central back plate 160.

This expansion of the movable knife shaft 150 and the side light plate 170 is achieved by hydraulic means. As shown in the lower drawing of FIG. 6, the port 171a of the slide main pipe 171 provided on one side light plate 170 When hydraulic pressure is supplied, one side of the slide main pipe 171 is pulled out from the connecting rod 173 and expanded, and in this process, the piston 174 of the connecting rod 173 and the tip of the slide main pipe 171 are supplied. Hydraulic pressure flows into the second port (173b) of the connecting rod 173, and the hydraulic pressure flowing into the second port (173b) is discharged to the first port (173a) of the connecting rod 173 on the opposite side and slides on the other side. It flows into the main pipe 171 and pushes and withdraws the other slide main pipe 171 outward from the connecting rod 173, so that the side back plate 170 and the movable knife shaft 150 are formed on the central back plate 160 and the main shaft 111, respectively. It is drawn out and expanded as shown in Figure 7.

Conversely, as shown in the upper drawing of FIG. 6, when hydraulic pressure is discharged through the port 171a of one side slide main pipe 171, one side slide main pipe 171 is moved toward the connecting rod 173 by vacuum pressure, and this In the process, the hydraulic pressure in the connecting rod 173 is discharged into the space between the piston 174 of the connecting rod 173 and the tip of the slide pipe 171 through the second port 173b, and at the same time, the connecting rod 173 As the hydraulic pressure in the other slide pipe 171 flows into the first port (173a) due to the vacuum pressure acting inside, the other slide pipe 171 also moves to the connecting rod 173 side, and the drawn out side light plate 170 and the movable type The knife axis 150 is retracted into the central back plate 160 and the main axis 111, respectively, and is reduced as shown in FIG. 8.

In this way, as the length of the knife shaft 150 (150a) is extended or reduced, the work area of the rotavator 100 can be expanded or reduced according to the performance of the agricultural tractor to enable quick and efficient tillage work, and the knife shaft 150 As the length of (150a) is adjusted, the lengths of the

back plates

160 and 170 are simultaneously adjusted.

In addition, as the

back panels

160 and 170 expand or contract, the

door panels

180 and 190 hinged to each

back panel

160 and 170 are also moved and expanded or contracted at the same time.

As a result, the length between the central spine 160 and the side spine 170 is adjusted according to the length of the knife shaft 150 (150a) that is extended or contracted from the main shaft 111, thereby preventing soil from splashing upward or backward during tillage. You can do it.

Although the present invention has been described in detail through specific examples, this is for detailed explanation of the present invention, and the present invention is not limited thereto, and can be understood by those skilled in the art within the technical spirit of the present invention. It is clear that modifications and improvements are possible.

All simple modifications or changes of the present invention fall within the scope of the present invention, and the specific scope of protection of the present invention will be made clear by the appended claims.

(Explanation of symbols)

100: Rotator 110: Gearbox

110a: Plow protrusion 111: Main shaft

112: second sprocket wheel 120: power transmission unit

121: input shaft 122: bearing

123: Hinge bushing 124: First sprocket wheel

125: Chain 126: Mounting box

126a: cover part 126b: extension part

130: Gearbox cover 131: Support plate

132: Bearing 133: Bearing fixing member

134: Group seal 135: Group seal support member

136: O-ring 140: Shock absorber

140a: Cylinder body 140b: Piston rod

141: Guard 142: Connecting link

142a: bending part 150,150a: knife axis

151: tillage blade 152: lug bar

153: Foreign substance wrapping prevention bar 154: End block

154a: Finishing portion 154b: Protrusion

155: Sealing groove 156: Group seal

157: O-ring 160: Center back plate

161: Slide tube 170: Side back panel

171: Slide pipe 171a: Port

172: stopper 173: connecting rod

173a, 173b: Port 174: Piston

175: Connection plate 176: Bearing housing

176a: Step portion 176b: O-ring

177: Bearing 178: Locknut

179: cap nut 179a: work tool

180: central door 190: side door

200: Detachable part

Claims

It is an automatically expandable agricultural work machine that is connected and mounted to enable power transmission to an agricultural tractor,

The agricultural implement is equipped with a main shaft that is rotated by receiving power from the tractor at its center,

On both sides of the main shaft, there is a knife shaft that is coupled to move in the axial direction and is pulled out from the main shaft to expand or retracted and contracted, while rotating along with the main shaft to perform a tilling operation,

Hydraulic means are provided to move the knife axis from the main axis,

An automatically expanding agricultural work machine that is moved along with the knife axis by hydraulic means to move the knife axis, expanding or contracting, and is provided with a back plate that covers the main axis and the knife axis.
In claim 1,

The back panel includes a central back panel that is provided on the upper part of the main axis and covers the main axis, and a side back board that is movably coupled to each side of the central back board and is provided to expand or contract from the central back board,

The side light panel is an automatically extendable agricultural work machine equipped to be moved along with the knife axis by hydraulic means.
In claim 1 or claim 2,

An automatically extendable agricultural work machine further provided with a connecting plate on the side light panel that connects the side light panel to the knife axis so that the side light panel and the knife axis can be moved simultaneously by hydraulic means.
In claim 3,

The connecting plate is fixed to the side back plate, while the knife axis is rotatable on the connecting plate,

The knife shaft is provided with an end block that finishes the inside of the knife shaft,

The connection plate is equipped with a bearing housing that is sealed and coupled to the end block protruding from the knife axis.

A bearing is provided between the bearing housing and the end block to allow the end block to rotate with the knife axis,

An automatically expanding agricultural implement equipped with a bearing housing equipped with a cap nut that blocks exposure of the bearing and end block and has a tool that can supply lubricant to the bearing.
In claim 2,

The hydraulic means includes a slide tube fixed to the center back plate;

A plurality of slide pipes are each fixed to both side lights and are provided to enter and exit the slide pipe, and a port through which hydraulic pressure enters and exits is formed on one side;

It includes a connecting rod that is fixed in a state of penetrating the slide pipe, and has both ends inserted into and moved in both slide pipes, and has ports through which hydraulic pressure enters and exits, respectively, on both sides,

An automatically expanding agricultural work machine in which the connecting rod and both slide pipes are extended and expanded as hydraulic pressure is supplied to the port of the slide pipe on one side.
In claim 1 or claim 2,

The knife axis includes a fixed knife axis fixed to the main axis, and a movable knife axis movable on the main axis,

An automatically expanding agricultural work tool provided between the fixed knife axis and the movable knife axis with a foreign material wrapping prevention bar whose length expands or contracts as the movable knife axis moves.
In claim 6,

An automatically expandable agricultural work tool equipped with a lug bar on the fixed knife shaft between the foreign material entanglement prevention bars on both sides that rotates along with the axis to remove foreign materials and prevent foreign materials from becoming entangled in the shaft.
In claim 1,

An automatically extendable agricultural implement equipped with a shock absorber between the agricultural implement and the tractor to cushion the implement rolling on the tractor.