JP4129150B2 - Folding farm work machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a folding farm work machine in which an extension work machine body is provided for a work machine body connected to a rear portion of a tractor so as to be movable up and down, and the extension work machine body is foldable with respect to the work machine body.
[0002]
[Prior art]
As this type of folding work machine, there is known a rotary work machine that performs tilling, leveling, or plowing work. In this rotary work machine, the work machine body at the center of the work width is connected to the rear part of the tractor via a connecting device that can be raised and lowered, and the extension work machine body that extends the work width is folded on both the left and right sides of the work machine body. It is deployed as possible. Here, the rotary shaft (rotary shaft) pivotally supported by the work implement body is rotationally driven by the power from the tractor, and the extended rotary shaft (extended rotary shaft) pivotally supported by the extension work implement body is the end of the rotary shaft. By connecting the part to the end of this extended rotary shaft, it is rotationally driven via the rotary shaft. Therefore, this folding rotary work machine can perform a narrow work by using the work machine body alone with the extended work machine body on the left and right sides folded with respect to the work machine body at the center. It is also possible to install one or both of the left and right extension work machines in an extended state and connect the extension rotary shaft to the rotary shaft of the work machine body so that the work width is extended.
[0003]
Various proposals have heretofore been made for connecting end portions of a rotary shaft and an extended rotary shaft in such a rotary working machine. Japanese Patent Application Laid-Open No. 8-191609 provides a clutch device in which one claw clutch projects at the end of a rotary shaft, and a clutch device in which the other claw clutch that engages with the end of the extended rotary shaft projects. Have been disclosed. In JP 2000-34001 A, an engagement body having an engagement surface formed on the rotational direction side of the shaft is provided at the end of the rotary shaft, and the engagement surface of the engagement body is provided at the end of the extended rotary shaft. The thing provided with the to-be-engaged body which formed the to-be-engaged surface to engage is disclosed.
[0004]
[Problems to be solved by the invention]
According to such a prior art, the connection part of a rotary shaft and an extension rotary shaft is arranged in the state exposed mutually from the side surface of the work machine main body or the extension work machine body. Since the work implement body may be used alone with the extension work device folded, contaminants such as grass and straw are tangled, especially at the connection exposed on the side of the work implement body. As a result, there has been a problem that the rotational drive resistance and the entangled impurities become an obstacle and the connection with the extension rotary shaft of the extension work machine is not smoothly performed.
[0005]
Also, when lifting the farm work machine with the extension work machine folded, and running the tractor on the road, etc., it will rotate with the projections of the engagement pieces etc. in the connection part exposed, so safety There was also a problem in terms of.
[0006]
An object of the present invention is to cope with such a problem. Specifically, the present invention includes a rotating shaft that is pivotally supported by a work machine body and an extended rotating shaft that is pivotally supported by an extension work machine body. An object of the present invention is to provide a folding farm machine with high safety while preventing entanglement of grass, straw, and the like in the exposed connection part.
[0007]
[Means for Solving the Problems]
In order to achieve such an object, the claimed invention according to the present invention has the following features.
[0008]
The invention according to claim 1 is connected to the rear portion of the tractor so as to be able to move up and down, and has a working machine body on which a rotary shaft driven by power from the tractor is pivotally supported, and the working width of the working machine body is extended. And an extension work machine body that is supported by an extended rotary shaft that is rotated by receiving power from the rotary shaft, and the rotary shaft end portion and the extended rotary shaft end portion are connected to each other. a state of being connected via the disengaged rotary shaft and said extension rotary shaft to be selected and a state of folding the extension working machine body relative to the working machine main body, the side face of the machine body, exposed The barrier portion surrounding the connecting portion is fixed in a fixed state, and a gap communicating with the inside is formed on the side surface or bottom surface of the barrier portion .
[0009]
The invention according to claim 2 is characterized in that, based on the invention according to claim 1, the barrier portion is formed of a cylindrical body surrounding the connection portion.
[ 0010 ]
According to the invention according to each claim, the following operations are performed.
[ 0011 ]
That is, the folding farm work machine is connected to the rear part of the tractor so as to be movable up and down, and the work machine main body on which the rotary shaft driven by the power from the tractor is pivotally supported, and the work width is extended with respect to the work machine main body. deployed as consists an extension work aircraft extending rotary shaft is rotatably supported to be rotated by the power from the rotary shaft, and a state where the rotary shaft end and extending rotary shaft ends are connected, rotary The extension work machine body can be selected to be detached from the extension rotary shaft and folded to the work machine body, so that the left and right extension work machine bodies are folded with respect to the work machine body at the center. , it is possible to perform the work of narrow using machine body alone, one or both of the left and right extended working body is placed in the extension state, the rotor of the machine body extension rotary shaft By connecting the axis, it is possible to work in a state of being extended working width.
[ 0012 ]
Further, a barrier portion surrounding the exposed connection portion is fixed on the side surface of the work machine main body in a state of being fixed . The barrier portion has a wall disabled for grass, straw etc. approaching connection. This barrier portion can prevent entanglement of connection portions such as grass and straw. Moreover, since the barrier portion surrounds the periphery of the connection portion, safety can be improved.
[ 0013 ]
Further, by forming a gap communicating with the interior side surface or bottom surface of the barrier section, Ru can also be easily discharged when the internal soil and rocks and the like of the barrier unit is accumulated.
[ 0014 ]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[ 0015 ]
FIG.1 and FIG.2 is an external view of the rotary working machine which is a folding agricultural working machine. The rotary work machine 1 is a rotary halo that has a long work width in the left-right direction and can perform wide crushed soil or scraping work in one stroke. A connecting portion 2 connected to a three-point link hitch mechanism comprising a top link and a lower link of a tractor (not shown) is provided at a front central portion of the rotary work machine 1. It is connected by the connection part 2 so that raising / lowering is possible. In addition, power is transmitted from the PTO shaft of the tractor to the gear box 3 through transmission means such as a universal joint.
[ 0016 ]
The rotary work machine 1 includes a work machine body 4 at a central portion having a work width slightly wider than a tractor tire interval, and an extended work machine body 5L provided to extend the work width to the left and right of the work machine body 4. 5R, and has a structure that is divided into three by the work machine body 4 and the extension work machines 5L and 5R. And the extension work machine bodies 5L and 5R are connected so as to be able to rotate about 180 ° by the rotation support parts 6 and 6 provided on the fixed cover member 15 of the work machine body 4, and as shown in FIG. The folded state can be maintained by superimposing the back surface of the work machine body 4 and the back surfaces of the extension work machine bodies 5L and 5R arranged on the left and right sides. In addition, when extending the working width, one or both of the extension work machines 5L and 5R can be held horizontally with respect to the work machine body 4 so that the above-described folded state and unfolded state can be maintained. And can be selected.
[ 0017 ]
Here, the work implement body 4 has a work width wider than the tire interval of the tractor as described above, so that the wheel marks attached to the field by the tire of the tractor can be erased. In addition, the extension work machine bodies 5L and 5R are set to be less than or equal to half the length of the work machine body 4 so that both the left and right sides can be folded.
[0018]
And the fixed cover members 15 and 15a mentioned above are provided in the upper part in each of the work machine main body 4 and the extension work machine bodies 5L and 5R, respectively, and the upper end parts of the leveling members 16 and 16a are respectively provided in the lower end parts thereafter. It is pivotally mounted via a pivot shaft 16b. Further, the base ends of the leveling plates 17 and 17a are pivotally supported by the pivot shaft 17b at the rear ends of the leveling members 16 and 16a. Here, the flat plate 17 in the work machine body 4 is supported at the center in the width direction via the flat plate control body 18, and the flat plate 17 can be freely rotated by the pivot shaft 17b. And the fixed state in which the rotation of the flat plate 17 is regulated on the lower side and the soiling of the scraped soil is carried out, and this selection is made so that the tractor operator can operate in the driving state. Yes.
[ 0019 ]
Further, leveling member coupling devices 19 are provided on both sides of the leveling member 16 in the work machine main body 4 and the leveling members 16a and 16a in the extension work machines 5L and 5R. Leveling plate coupling devices 20 are provided on both sides of the leveling plates 17a and 17a in the work machine bodies 5L and 5R. Reference numerals 19A and 20A in FIG. 2 indicate position regulating members in the leveling member coupling device 19 and the leveling plate coupling device 20, respectively.
[ 0020 ]
On the left and right sides of the gear box 3, a main body frame 7 for supporting the work machine main body 4 is extended. In this working machine body 4, a transmission case 8 is suspended from one end side of the main body frame 7, and a support frame 9 is suspended from the other end side. A rotary working unit is provided between the transmission case 8 and the support frame 9. 10 is mounted on the shaft. Further, in the extension work machine bodies 5L and 5R, an extension rotary work part 13 (13A indicates an extension rotary shaft and 13B indicates a rotary claw) is provided between the shaft support parts 14 and 14. Reference numeral 11 denotes a connection part exposed on the side surface of the transmission case 8 (projection piece 11A, cylindrical body 21), and 12 denotes a connection part exposed to the outside of the shaft support part.
[ 0021 ]
FIG. 3 is an explanatory diagram for explaining the drive unit of the rotary working machine described above. The same parts as those described above are denoted by the same reference numerals. The gear box 3 protrudes from an input shaft 3A to which power from the PTO shaft of the tractor is input via a transmission means such as a universal joint. The power input to the input shaft 3A is transmitted to the gear transmission mechanisms 3B and 3C. The transmission shaft 7A, the sprocket 8A in the transmission case 8 and the chain 8B are transmitted to the rotary shaft 10A.
[ 0022 ]
The rotary shaft 10 </ b> A has a plurality of rotary claws 10 </ b> B projecting from its peripheral surface, and both ends thereof are pivotally supported by the shaft support portions 4 </ b> A and 4 </ b> A of the work machine body 4 to form the rotary work portion 10. The extended rotary shaft 13A has a plurality of rotary claws 10B projecting from its peripheral surface, and both ends thereof are pivotally supported by the shaft support portions 14 of the extension work machine bodies 5L and 5R to form the extended rotary work portion 13. Yes.
[ 0023 ]
Then, the both ends of the rotary shaft 10A, that has connecting portions 11 exposed to the outside is provided, et al is from the side of the machine body 4. Further, the connected portion 12 connected to the connecting portion 11 (projecting piece 11A, cylindrical body 21) is exposed from the side surface of the extension work machine body 5L, 5R, and is provided at one end portion of the extension rotary shaft 13A. Yes. Accordingly, when the extension work machine bodies 5L and 5R are expanded horizontally with respect to the work machine body 4, the connection part 11 at the end of the rotary shaft 10A and the connected part 12 at the end of the extension rotary shaft 13A are connected, Power is transmitted to the extended rotary shaft 13A via the rotary shaft 10A. Further, in a state where the rotary shaft 10A and the extended rotary shaft 13A are detached and the extension work machine bodies 5L and 5R are folded with respect to the work machine body 4, the rotary shaft 10A is driven alone.
[ 0024 ]
FIG. 4 is an explanatory view showing the form of the connection part on the work machine main body side and the connected part on the extension work machine side. The connecting portion 11 is provided at the end of the rotary shaft 10A, and a plurality of protruding pieces 11A protruding in a direction perpendicular to the shaft are arranged symmetrically with an interval. On the other hand, the connected portion 12 is provided at the end of the extended rotary shaft 13A, and a plurality of fitting grooves 12A opened so as to be fitted to the projecting pieces 11A extend in the axial direction and are formed symmetrically. The fitting groove 12A has a groove width that fits closely with the protruding piece 11A at the bottom, and in the vicinity of the opening, the inclined opening that guides the protruding piece 11A to the fitting groove 12A between the fitting grooves. Part 12B is formed. The number of fitting grooves 12A is set to be a multiple (2 or 3 times) of the number of protruding pieces 11A.
[ 0025 ]
FIG. 5 is a partial cross-sectional view showing the vicinity of the end of the rotary shaft 10A on the work machine body 4 side. On the side surface of the fixed cover member 15 in the work machine main body 4, that is, on the side surface of the work machine main body 4, a cylindrical body 21 protrudes perpendicularly to the side surface. The cylindrical body 21 is provided so as to surround the periphery of the connection portion 11 exposed on the side surface of the work machine body 4, thereby preventing the grass and straw from contacting the connection portion 11 that is rotationally driven. Is forming.
[ 0026 ]
FIG. 6 is a front view of the connecting portion 11 surrounded by the cylindrical body 21. The cylindrical body 21 is provided so as to surround the protruding pieces 11A at a predetermined interval from the tip of the protruding pieces 11A provided perpendicular to the axis. Therefore, a certain amount of gap 21a is formed between the periphery of the connecting portion 11 and the inside of the cylindrical body 21, and thereby, when soil, water, stone, or the like enters the cylindrical body 21 Can be easily discharged.
[ 0027 ]
FIG. 7 is a view corresponding to FIG. 5 and shows another embodiment of the cylindrical body 21. According to this example, the cylindrical body 21 is formed with a gap 21b communicating with the inside at the side and bottom. By forming such a gap 21b, the above-described discharge of soil, water, stone, or the like can be improved.
[ 0028 ]
According to the rotary working machine 1 of such an embodiment, as shown in FIG. 1, the usage mode in which the left and right extension working machines 5L and 5R are horizontally deployed with respect to the working machine body 4 to work with a wide working width, As shown in FIG. 2, the left and right extension work machines 5 </ b> L and 5 </ b> R are folded with respect to the work machine body 4, and the working mode is such that only the work machine body 4 works. It is possible to select each usage pattern of the usage pattern in which the work width of only one of the left and right sides is widened while one of 5L and 5R is folded. Further, when traveling on the road or being stored in the warehouse, the working machine body 4 is lifted up to the non-working position, and the left and right extension work machines 5L and 5R are folded with respect to the working machine body 4 in this state. It can also be.
[ 0029 ]
And since the cylindrical body 21 surrounding the periphery of the exposed connection part 11 is projected on the side surface of the work machine body 4, there is a barrier against grass, straw and the like that the cylindrical body 21 approaches the connection part 11. Thus, the entanglement with the connecting portion 11 can be prevented. Moreover, since the cylindrical body 21 surrounds the periphery of the connecting portion, safety can be improved.
[ 0030 ]
Further, since the cylindrical body 21 is provided so as to surround the protruding piece 11A with a gap from the tip of the protruding piece 11A of the connecting portion 11, when the soil or stones are accumulated inside the cylindrical body 21. Can also be discharged easily. When the gap 21b communicating with the inside is formed on the side surface or the bottom surface of the cylindrical body 21 as in the embodiment shown in FIG. 7, the above-described discharge effect can be further enhanced.
[ 0031 ]
【The invention's effect】
Since the present invention is configured as described above, in the connection portion between the rotary shaft that is pivotally supported by the work implement body and the extended rotary shaft that is pivotally supported by the extension work implement body, grass, straw, A foldable agricultural working machine with high safety can be provided while preventing entanglement.
[Brief description of the drawings]
FIG. 1 is an external view (when unfolded) of a rotary working machine that is a folding agricultural working machine of the present invention.
FIG. 2 is an external view (when folded) of a rotary working machine which is a folding agricultural working machine of the present invention.
FIG. 3 is an explanatory diagram illustrating a drive unit of a rotary working machine that is a folding agricultural working machine according to the present invention.
FIG. 4 is an explanatory view showing a form of a connection part on the work machine body side and a connected part on the extension work machine side according to the present invention.
FIG. 5 is a partial cross-sectional view showing the periphery of the rotary shaft end portion on the work machine main body side according to the present invention.
FIG. 6 is a front view of a connecting portion surrounded by a cylindrical body according to the present invention.
FIG. 7 is a view corresponding to FIG. 5 and an explanatory view showing another embodiment of a cylindrical body.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Rotary work machine 2 Connection part 3 Gear box 4 Work machine main body 4A Shaft support part 5L, 5R Extension work machine body 6 Rotation support part 7 Main body frame 8 Transmission case 9 Support frame 10 Rotary work part 10A Rotary shaft 11 Connection part 11A Projection piece 12 connected part 12A fitting groove 12B inclined opening 13 extending rotary working unit 13A extending rotary shaft 14 between the shaft support 21 the cylindrical body 21 a gap <br/> 21b gap

Claims (2)

Be vertically coupled to the rear of the tractor, the machine body which rotary shaft is rotatably supported to be driven by power from the tractor, are deployed so as to extend the working width with respect to the machine body, the rotary An extension work machine body that is supported by an extended rotary shaft that is rotated by receiving power from the shaft, and the rotary shaft end portion and the extended rotary shaft end portion are connected via a connection portion; enabling selection between a state in which folding the extended working body to said working machine body disengaged and said extended rotary shaft and the rotary shaft, the sides of the machine body, surrounding the connection portions exposed barrier A folding agricultural work machine characterized in that the part is fixed in a state of being fixed and a gap communicating with the inside is formed on the side or bottom of the barrier part . The folding agricultural work machine according to claim 1, wherein the barrier portion is formed of a cylindrical body surrounding the connection portion.

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