JP2004033018A - Foldable agricultural implement - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To smoothly carry out connection and eliminate an impulsive sound in a connected state in connecting a rotating shaft on the implement body side of a foldable agricultural implement to each extended rotating shaft of an extended implement body. <P>SOLUTION: The foldable agricultural implement is provided with each connecting part 11 in which protruding pieces 11A protruding in the vertical direction relatively to the shaft are arranged at an interval kept therebetween in axial symmetry at the end of a rotary shaft 10A on the implement body side. A part 12 for connection in which fitting grooves 12A for extending in the shaft direction and closely fitting with the protruding pieces 11A are formed in the axial symmetry and tilted opening parts 12B for guiding the protruding pieces 11A to the fitting grooves 12A formed between the fitting grooves 12A are provided at the ends of the extended rotary shaft 13A on the extended implement body side. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a foldable agricultural work machine in which an extension work machine is provided for a work machine main body which is connected to a rear part of a tractor so as to be able to move up and down, and the extension work machine is provided so as to be foldable with respect to the work machine body.
[0002]
[Prior art]
As this type of folding agricultural working machine, a rotary working machine that performs tilling, leveling, or scraping work is known. In this rotary working machine, the working machine main body at the center of the working width is connected to the rear of the tractor via a vertically movable connecting device, and an extended working body for extending the working width is folded on both left and right sides of the working machine main body. Deployed as possible. Here, the rotary shaft (rotary shaft) supported by the working machine body is driven to rotate by the power from the tractor, and the extended rotary shaft (extended rotating shaft) supported by the extended working machine body is an end of the rotary shaft. The part is connected to the end of the extended rotary shaft and is driven to rotate via the rotary shaft. Therefore, with this folding rotary working machine, it is possible to perform narrow work using the working machine body alone in a state where the left and right extended working bodies are folded with respect to the center of the working machine body. Alternatively, one or both of the left and right extension working bodies may be installed in an extended state, and the extended rotary shaft may be connected to the rotary shaft of the working machine body to perform the operation with the working width extended.
[0003]
Regarding the end connection between the rotary shaft and the extended rotary shaft in such a rotary working machine, it is required to shorten the connection space so that a non-working area is not formed between the working machine main body and the extended working machine body. . In addition, since the extended rotary shaft side is freely supported in a non-connected state, there is a possibility that the engagement position between the connection portions may be shifted at the time of connection, and a connection structure capable of connecting even if a slight displacement occurs is required. ing.
[0004]
Various proposals have conventionally been made for this. JP-A-8-191609 discloses a clutch device in which one claw clutch is protruded at the end of a rotary shaft, and a clutch device in which the other claw clutch engaged with this is protruded at an end of an extended rotary shaft. Are disclosed. Japanese Patent Application Laid-Open No. 2000-342001 discloses a method in which an engagement body having an engagement surface formed on the end of a rotary shaft on the rotation direction side of the shaft is provided, and an engagement surface of the engagement body is provided on an end of an extended rotary shaft. An apparatus provided with an engaged body having an engaged surface to be engaged is disclosed.
[0005]
[Problems to be solved by the invention]
According to such a conventional technique, when connecting the rotary shaft and the extended rotary shaft, even if the contact surfaces for connection are shifted from each other, the mutual contact surfaces are rotated by rotating the rotary shaft. The power can be transmitted from the rotary shaft to the extended rotary shaft in contact therewith. However, the structure described in Japanese Patent Application Laid-Open No. 8-191609 not only has a problem that claws clutches collide with each other at the time of connection and is liable to be damaged. There is a problem that contaminants such as soil, grass, and straw adhere to the engagement surfaces of the clutch device, and normal engagement cannot be obtained.
[0006]
Further, in the structure described in Japanese Patent Application Laid-Open No. 2000-342001, when the rotary shaft and the extended rotary shaft are connected, the contact surfaces (the engaging surface and the engaged surface) for connection have play. When these are lifted up with the extended work unit extended with respect to the work unit body, vibrations from the tractor and uneven rotation of the rotary shaft will cause There is a problem that an impulsive sound is generated at which the contact surfaces come into contact. On the other hand, it is also disclosed that a buffer member is provided on the contact surface, but according to this, the buffer member deteriorates due to repeated collisions, so that a new maintenance problem arises, and a fundamental problem can be solved. The reality is that it must not.
[0007]
An object of the present invention is to address such a problem. Specifically, the present invention relates to a rotating shaft that is supported by a working machine body and an extended rotating shaft that is supported by an extended working body. Provided is a folding farm work machine that can shorten a connection space at the time of connection and can surely connect even when the connection is displaced or soil adheres, and further, does not generate an impact sound in a connected state. The purpose is.
[0008]
[Means for Solving the Problems]
In order to achieve such an object, the invention according to each claim of the present invention has the following features.
[0009]
According to the first aspect of the present invention, there is provided a working machine main body which is connected to a rear portion of a tractor so as to be able to move up and down, and which is rotatably supported by a rotary shaft driven by power from the tractor; And an extended working body supported by an extended rotating shaft that is rotated by receiving power from the rotating shaft, and the rotating shaft end and the extended rotating shaft end are connected to each other. State, a state in which the rotating shaft and the extended rotating shaft are detached from each other and the extended working machine body is folded with respect to the working machine body. At one end, a protruding piece projecting in a direction perpendicular to the axis is provided with a connecting portion arranged at an interval and axially symmetric, and the other end of the rotating shaft or the extended rotating shaft is provided at the other end. Extending in the axial direction, the protruding pieces are tightly fitted. Groove is formed in axial symmetry, and wherein said to-be-connected portion inclined opening portion is formed to the projection piece is guided in the fitting groove is provided between the fitting grooves.
[0010]
The invention according to claim 2 is based on the premise of the folding farm work machine according to claim 1, wherein the projecting piece is formed such that a side surface on a connected portion side is formed in a convex shape.
[0011]
The invention according to claim 3 is characterized in that the number of the fitting grooves is a multiple of the number of the projecting pieces on the premise of the folding agricultural working machine of claim 1.
[0012]
According to the inventions according to the respective claims, the following operations are performed.
[0013]
In other words, the folding farm work machine is connected to the rear of the tractor so as to be able to move up and down, and a work machine main body on which a rotating shaft driven by power from the tractor is supported, and extends the working width with respect to the work machine main body. And an extended working body supported by an extended rotating shaft that is rotated by receiving power from the rotating shaft, wherein the rotating shaft end and the extended rotating shaft end are connected, and The state where the extension work body is folded off with respect to the work machine body by detaching the shaft and the extended rotation shaft is selectable, so the left and right extension work bodies are folded with respect to the work machine body in the center part It is possible to use the work machine body alone to perform narrow work, and also install one or both of the left and right extension work bodies in the extended state, and rotate the extended rotation axis to rotate the work machine body. Connect to the shaft to extend the working width It is possible to work in the state.
[0014]
The connecting portion and the connected portion between the rotating shaft and the extended rotating shaft are composed of a protruding piece projecting in a direction perpendicular to the shaft, a fitting groove extending in the axial direction, and an inclined opening portion. Only the width of the fitting groove and the inclined opening portion becomes the width in the axial direction, and the space in the axial direction of the connecting portion and the connected portion can be minimized.
[0015]
Further, the protruding pieces of the connecting portion are arranged axially symmetrically with a space therebetween, and this is guided by the inclined opening portion and fits into the fitting groove of the connected portion formed axially symmetrically, Even if the protruding piece of the connecting portion is displaced from the fitting groove on the side of the extended rotary shaft, a smooth connection is possible. Further, since the projecting pieces of the connecting portion are arranged at intervals, the structure is such that soil and the like are hardly adhered.In addition, the projecting piece is fitted into the fitting groove instead of a form in which the connecting surfaces are brought into contact with each other. Since the connection is made by the connection, the influence of the attached matter can be reduced, and the rotating shaft and the extended rotating shaft can be reliably connected.
[0016]
Further, in a state where the rotating shaft and the extended rotating shaft are connected, the protruding piece of the connecting portion and the fitting groove of the connected portion are closely fitted, so that a connection state without play is realized. Noise due to the impact noise can be eliminated.
[0017]
In addition to such a feature, by making the side surface of the projecting piece on the side of the connected portion convex or by making the number of fitting grooves a multiple of the number of projecting pieces, a smoother rotation shaft and extended rotation can be achieved. A connection with the shaft can be obtained.
[0018]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0019]
1 and 2 are external views of a rotary working machine that is a folding farm working machine. The rotary working machine 1 is a rotary harrow having a long working width in the left-right direction and capable of performing wide crushing or scraping work in one stroke. In the center of the front part of the rotary working machine 1, there is provided a connecting part 2 which is connected to a three-point link hitch mechanism composed of a top link and a lower link of a tractor (not shown). Are connected so as to be able to move up and down by a connecting portion 2. Also, power is transmitted from the PTO shaft of the tractor to the gearbox 3 via a transmission means such as a universal joint.
[0020]
This rotary working machine 1 includes a working machine main body 4 in a central portion having a working width slightly larger than a tractor tire interval, and an extended working body 5L, which is provided on the left and right sides of the working machine main body 4 to extend the working width. 5R, and is divided into three parts by the working machine body 4 and the extended working bodies 5L and 5R. The extension working machines 5L and 5R are connected to each other by rotation supporting portions 6 and 6 provided on the fixed cover member 15 of the working machine main body 4 so as to be able to rotate substantially 180 °. As shown in FIG. The folded state can be maintained by overlapping the back surface of the working machine body 4 and the back surfaces of the extended working machine bodies 5L and 5R provided on the left and right. Further, when the working width is extended, one or both of the extended working bodies 5L and 5R can be held in a horizontally expanded state with respect to the working machine body 4, and the above-mentioned folded state and expanded state can be maintained. And can be selected.
[0021]
Here, the work implement body 4 has a work width wider than the tractor tire interval as described above, so that wheel marks attached to the field by the tractor tires can be erased. In addition, the length of each of the extension working machines 5L and 5R is set to a half or less of the length of the working machine main body 4 so that both the left and right sides can be folded.
[0022]
The above-mentioned fixed cover members 15, 15a are respectively provided on the upper portions of the working machine main body 4 and the extended working machine bodies 5L, 5R, and the upper ends of the ground leveling members 16, 16a are respectively provided at the lower ends thereof. It is pivotally connected via a pivot 16b. The base ends of the leveling plates 17, 17a are pivotally supported by pivot shafts 17b at the rear ends of the leveling members 16, 16a. Here, the leveling plate 17 in the working machine main body 4 is supported at the center in the width direction via a leveling plate control body 18, and the leveling operation state in which the leveling plate 17 can be freely rotated by the pivot shaft 17b. And a fixed state in which the rotation of the leveling plate 17 is restricted on the lower side to perform scraping of the scraping soil, etc., and this selection is made so that the tractor operator can operate in the driving state. I have.
[0023]
Also, on both sides of the leveling member 16 in the working machine body 4 and the leveling members 16a, 16a in the extension working bodies 5L, 5R, there are provided leveling member coupling devices 19, which extend from the leveling plate 17 in the working machine body 4 to extend. On both sides of the leveling plates 17a, 17a in the working machine bodies 5L, 5R, leveling plate coupling devices 20 are provided. Reference numerals 19A and 20A in FIG. 2 indicate position regulating members in the leveling member connecting device 19 and the leveling plate connecting device 20, respectively.
[0024]
On both left and right sides of the gear box 3, a main body frame 7 that supports the work machine main body 4 is extended. A transmission case 8 is suspended from one end of a main body frame 7 of the working machine body 4, and a support frame 9 is suspended from the other end, and a rotary working unit is provided between the transmission case 8 and the support frame 9. 10 is mounted on the shaft. In the extension working bodies 5L and 5R, an extended rotary working portion 13 (13A indicates an extended rotary shaft, and 13B indicates a rotary claw) is axially mounted between the shaft supports 14 and 14. Reference numeral 11 denotes a connecting portion exposed on the side surface of the transmission case 8 (the protruding piece 11A, the cylindrical body 21), and reference numeral 12 denotes a connected portion exposed on the outside of the shaft support portion 14.
[0025]
FIG. 3 is an explanatory diagram illustrating a driving unit of the rotary working machine described above. The same parts as those described above are denoted by the same reference numerals. An input shaft 3A through which power from the PTO shaft of the tractor is input via a transmission means such as a universal joint protrudes from the gearbox 3, and the power input to the input shaft 3A is transmitted to the gear transmission mechanisms 3B and 3C. Is transmitted to the rotary shaft 10A via the transmission shaft 7A, the sprocket 8A in the transmission case 8, and the chain 8B.
[0026]
The rotary shaft 10A has a plurality of rotary claws 10B protruding from a peripheral surface thereof, and both ends thereof are rotatably supported by the shaft supporting portions 4A, 4A of the working machine main body 4 to form the rotary working portion 10. The extended rotary shaft 13A has a plurality of rotary claws 10B protruding from a peripheral surface thereof, and both ends thereof are supported by the shaft supporting portions 14 of the extended working bodies 5L and 5R to form the extended rotary working portion 13. I have.
[0027]
At both ends of the rotary shaft 10A, connection portions 11 are provided to be exposed to the outside from the side surfaces of the work machine main body 4. Further, a connected portion 12 connected to the connecting portion 11 (the protruding piece 11A, the tubular body 21) is exposed from a side surface of the extension working machine body 5L, 5R, and is provided at one end of the extension rotary shaft 13A. I have. Therefore, when the extended working machine bodies 5L and 5R are deployed horizontally with respect to the working machine body 4, the connecting portion 11 at the end of the rotary shaft 10A and the connected portion 12 at the end of the extended rotary shaft 13A are in a connected state. 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 from each other and the extended work bodies 5L and 5R are folded with respect to the work machine main body 4, the rotary shaft 10A is driven alone.
[0028]
FIG. 4 and FIG. 5 are explanatory views showing the form of the connecting part on the working machine main body side and the connected part on the extension working machine body side. In FIG. 4, the connecting portion 11 is provided at an end of the rotary shaft 10A, and a plurality of protruding pieces 11A protruding in a direction perpendicular to the shaft are arranged axially symmetrically at intervals. On the other hand, the connected portion 12 is provided at an end of the extended rotary shaft 13A, and has a plurality of fitting grooves 12A which are opened so as to be fitted with the protruding pieces 11A, extend in the axial direction, and are formed axially symmetric. The fitting groove 12A has a groove width at the bottom that closely fits with the protruding piece 11A. Near the opening, the inclined opening that guides the protruding piece 11A into the fitting groove 12A between the fitting grooves. A portion 12B is formed. The number of the fitting grooves 12A is set to a multiple (two or three times) of the number of the protruding pieces 11A.
[0029]
FIG. 5 is an explanatory diagram illustrating functions of the connection unit and the connected unit according to the embodiment. In the connected portion 12, the portion between the fitting grooves 12A, 12A is formed in a mountain shape, and the protruding piece 11A at the time of connection is guided by the inclined open portions 12B formed on the left and right of the top of the mountain. It will fit in the groove. Therefore, a smooth connection can be performed even when the protruding piece 11A and the fitting groove 12A are displaced. In addition, once the protruding piece 11A is fitted into the fitting groove 12A, the fitting becomes tight, so that a connection without play is realized.
[0030]
FIG. 6 and FIG. 7 are explanatory views showing more specific examples of the above-mentioned connecting portion and connected portion. 6A and 6B show an example of the connection portion 11, wherein FIG. 6A is a front view as viewed from the axial direction, FIG. 6B is a partial side sectional view, and FIG. 6C is an AA in FIG. It is sectional drawing. The four protruding pieces 11A of the connection part 11 are formed axially symmetrically, and each protruding piece 11A is formed with a slope 11A1 so that the side face on the connected part side becomes convex. This enables a smoother connection to the connected part. Further, a concave portion 11B is formed on a surface facing the connected portion, and a cushioning material 11C such as rubber is provided on a central contact surface. 11D is a mounting hole in which the end of the rotary shaft 10A is mounted.
[0031]
7A and 7B show an example of the connected portion 12, in which FIG. 7A is a front view as viewed from the axial direction, FIG. 7B is a side view, and FIG. The connected portion 12 has the above-described fitting groove 12A and the inclined opening portion 12B formed on a cylindrical side surface. A convex portion 12C is formed inside the cylindrical side surface so as to fit into the concave portion 11B of the connection portion 11, and a cushioning material 12D such as rubber is provided on a contact surface at the center thereof. Reference numeral 12E denotes a mounting hole in which the end of the extended rotary shaft 13A is mounted, and 12F denotes a mounting flange to the side surface of the extended working body 5L, 5R.
[0032]
According to the rotary working machine 1 of such an embodiment, as shown in FIG. 1, the working form in which the left and right extended working bodies 5L, 5R are horizontally developed with respect to the working machine body 4 to work with a wide working width, As shown in FIG. 2, the working form in which the left and right extension working bodies 5 </ b> L and 5 </ b> R are folded with respect to the working machine main body 4 to work only with the working machine body 4, and the left and right extending working bodies with respect to the working machine body 4. It is possible to select each usage mode of the usage mode in which the working width of only one of the left and right sides is increased while one of 5L and 5R is folded. Also, when traveling on the road or storing in a warehouse, the working machine body 4 is lifted up to the non-working position, and the left and right extension working machines 5L, 5R are folded with respect to the working machine body 4 in this state. You can also
[0033]
The connection between the end of the rotary shaft 10A and the end of the extended rotary shaft 13A when one or both of the extension working bodies 5L and 5R are deployed horizontally with respect to the working machine body 4 has the following features. Have.
[0034]
That is, the connecting portion 11 on the rotary shaft 10A side and the connected portion 12 on the extended rotary shaft 13A side are formed by a projecting piece 11A protruding in a direction perpendicular to the shaft, a fitting groove 12A extending in the axial direction, and an inclined opening portion 12B. Therefore, in the connected state, only the width of the fitting groove 12A and the inclined opening portion 12B is substantially the axial width, and the axial space of the connecting portion 11 and the connected portion 12 can be minimized. This makes it possible to make the working area of the working machine body 4 and the working areas of the extended working bodies 5L and 5R adjacent to each other without any gap, and to prevent formation of a non-working area near these boundaries. .
[0035]
Further, the protruding pieces 11A of the connecting portion 11 are arranged axially symmetrically with an interval therebetween, and are guided by the inclined opening portion 12B to fit into the fitting groove 12A of the connected portion 12 formed symmetrically with respect to the axis. Therefore, even if the protruding piece 11A on the rotary shaft 10A side and the fitting groove 12A on the extended rotary shaft side are displaced, a smooth connection is possible.
[0036]
Further, since the projecting pieces 11A on the side of the working machine main body 4 are arranged at intervals, the structure is such that soil or the like does not easily adhere, and the connection surface is brought into contact with the connection surface as in the prior art. Instead, the projecting piece 11A is fitted into the fitting groove 12A and connected, so that the influence of the adhering matter around the projecting piece 11A is reduced, and the rotary shaft 10A and the extended rotary shaft 13A are securely connected. It becomes possible to do.
[0037]
Further, in a state where the rotary shaft 10A and the extended rotary shaft 13A are connected, the projecting piece 11A on the rotary shaft 10A side and the fitting groove 12A on the extended rotary shaft 13A are closely fitted. It is possible to realize a connection state without any problem. Thus, when the work implement body 4 is lifted up in a state where both shafts are connected, noise due to the impact noise can be completely eliminated.
[0038]
In addition to such features, by making the side surface of the protruding piece 11A on the side of the connected portion convex as in the embodiment shown in FIG. 6, a smoother connection between the connected portion 11 and the connected portion 12 can be achieved. Connection can be obtained. In addition, by setting the number of the fitting grooves 12A in the connected portion 12 to be a multiple of the number of the protruding pieces 11A, the possibility of positional displacement between the protruding pieces 11A and the fitting grooves 12A is reduced, and the smoothness is thereby achieved. You can get a connection.
[0039]
Further, as in the embodiment shown in FIGS. 6 and 7, by providing the cushioning materials 11C and 12D on the contact surfaces of the connecting portion 11 and the connected portion 12, it is possible to absorb the shock at the time of connection. It is.
[0040]
In the above description, the rotary shaft side is a connecting portion having a protruding piece, and the extended rotary shaft side is a connected portion having a fitting groove. Conversely, the rotary shaft side is a connected portion, an extended rotary shaft side. May be used as the connection part.
[0041]
【The invention's effect】
Since the present invention is configured as described above, when connecting the rotating shaft pivotally supported by the working machine main body and the extended rotating shaft pivotally supported by the extended working machine body, the connection space is shortened, and positional displacement between the connections is reduced. It is possible to provide a folded agricultural working machine that can reliably connect to the attachment of soil and the like and further does not generate an impact sound in the connected state.
[Brief description of the drawings]
FIG. 1 is an external view (when unfolded) of a rotary working machine which is a folding agricultural working machine of the present invention.
FIG. 2 is an external view (at the time of folding) 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 of the present invention.
FIG. 4 is an explanatory view showing a form of a connecting portion on the working machine body side and a connected portion on the extension working machine body side according to the present invention.
FIG. 5 is an explanatory view showing a form of a connecting portion on the working machine body side and a connected portion on the extension working machine body side according to the present invention.
FIG. 6 is an explanatory diagram showing a more specific embodiment of a connection unit.
FIG. 7 is an explanatory view showing a more specific example of a connected portion.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Rotary work machine 2 Connecting part 3 Gear box 4 Work machine main body 4A Shaft support part 5L, 5R Extension work body 6 Rotation support part 7 Body frame 8 Transmission case 9 Support frame 10 Rotary work part 10A Rotary shaft (rotary shaft)
11 Connecting portion 11A Projecting piece 12 Connected portion 12A Fitting groove 12B Inclined opening portion 13 Extended rotary working portion 13A Extended rotary shaft (extended rotary shaft)
14 Axle support

Claims (3)

A work implement main body that is movably connected to a rear portion of the tractor and that supports a rotating shaft that is driven by power from the tractor, and is provided so as to extend a working width with respect to the work implement main body; An extended working body supported by an extended rotating shaft that is rotated by receiving power from a shaft, and a state in which the rotating shaft end and the extended rotating shaft end are connected to each other; In a folding agricultural work machine capable of selecting a state in which the extension work machine body is separated from the work machine body by detaching the extension rotation shaft,
At one end of the rotating shaft or the extended rotating shaft, there is provided a connecting portion in which projecting pieces projecting in a direction perpendicular to the axis are arranged at an interval and are axially symmetric, and the rotating shaft or the extended At the other end of the rotating shaft, a fitting groove extending in the axial direction and tightly fitting the protruding piece is formed axially symmetrically, and the protruding piece is inserted into the fitting groove between the fitting grooves. A foldable agricultural working machine, wherein a connected portion having an inclined open portion for guiding is provided. The folding agricultural machine according to claim 1, wherein the projecting piece has a side surface on the connected portion side formed in a convex shape. The folding agricultural machine according to claim 1, wherein the number of the fitting grooves is a multiple of the number of the projecting pieces.

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