JP4532772B2 - Agricultural machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an agricultural machine that can be easily connected to a traveling vehicle.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, there is widely known a stand device dedicated to a two-point connection type farm work machine that enables height adjustment of a connection part of a traveling vehicle such as a tractor and a connected part of a farm work machine such as a scraping harrow.
[0003]
As described in, for example, Japanese Patent Application Laid-Open No. 2001-8502, this stand device has a base having casters, a support column rotatably attached to the base via a support shaft, and supports the support column. It consists of a coil spring or the like.
[0004]
[Problems to be solved by the invention]
In addition, the stand device having such a configuration has a large number of parts and is complicated in configuration and high in cost. In addition, since the stand device is a dedicated product for a two-point connected farming machine, it can be used for a three-point connected farmer. Can not.
[0005]
For this reason, in order to facilitate the connection work to the traveling vehicle, both a stand device dedicated to the two-point connection type farm work machine and a stand device dedicated to the three-point connection type farm work machine must be prepared respectively. It was.
[0006]
Therefore, in recent years, it has not been necessary to prepare both a stand device dedicated to a two-point connected farming machine and a stand device dedicated to a three-point connected farmer, and the conventional configuration is simple and inexpensive. It is important to develop a farming machine that can be supported by using a stand device dedicated to the machine, and the height of the connecting part and the connected part of the traveling vehicle can be adjusted so that it can be easily connected to the traveling vehicle. It was a difficult task.
[0007]
The present invention has been made in view of such points, and it is not necessary to prepare both a stand device dedicated to a two-point connected farm work machine and a stand device dedicated to a three-point connected farm work machine. It can be supported by using a stand device dedicated to a three-point connection type farming machine that is simple and inexpensive, and the height of the connecting part and connected part of the traveling vehicle can be adjusted, making it easy to travel to the traveling vehicle. An object is to provide an agricultural machine capable of connecting the two.
[0008]
[Means for Solving the Problems]
請 Motomeko 1 agricultural machine according includes a working machine frame having the connection portion that is connected to the holder attachment part and vehicle, the holder mounting portion of the working machine frame, wherein the connecting portion of the vehicle to be A stand holder that is pivotably mounted about a central axis of rotation in a horizontal direction so that the height of the connecting portion can be adjusted, and the work frame provided between the stand holder and the holder mounting portion. Biasing means for biasing the holder mounting portion in a direction to prevent rotation of the holder mounting portion with respect to the stand holder based on its own weight .
[0009]
The agricultural machine according to claim 2 is the agricultural machine according to claim 1, wherein the biasing means is a torsion spring, one end of the torsion spring is always in contact with the stand holder, and the other end of the torsion spring is It is inserted into the spring hole of the holder mounting portion.
[0010]
According to a third aspect of the present invention, the agricultural machine according to the first or second aspect further comprises stopper means that contacts the stand holder so that the stand holder does not rotate more than a predetermined amount.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the configuration of an embodiment of an agricultural machine according to the present invention will be described with reference to the drawings.
[0012]
In FIG. 1, reference numeral 1 denotes a tractor that is a towing vehicle as a traveling vehicle. The tractor 1 includes a pair of left and right front wheels (not shown) and a pair of left and right rear wheels 2 that are rotationally driven by power from an engine (not shown). A connecting portion 4 is provided between the pair of left and right rear wheels 2 as a working machine mounting portion for detachably mounting the towing type agricultural working machine 3.
[0013]
The connecting portion 4 is, for example, a two-point hitch type and has a pair of connecting holes 5 that are spaced apart from each other on the left and right. Further, although not shown, the connecting portion 4 has a PTO shaft and the like for outputting power to the agricultural machine 3.
[0014]
On the other hand, the farm work machine 3 is a plow work machine such as a two-point connection type plow harrow, and includes a work machine frame 7, and the work machine frame 7 can be detached from the connection part 4 of the tractor 1 at the front end. A connected portion 8 to be connected to is provided.
[0015]
The connected portion 8 is a two-point type corresponding to the connecting portion 4 of the tractor 1, and has horizontal connecting pins 9 that are spaced apart from each other on the left and right, and the connecting pins 9 are fitted into and removed from the connecting holes 5. The shape fits freely.
[0016]
Further, between the pair of left and right side plates 11 (for example, the left transmission case and the right bracket) of the work machine frame 7, a tilling means 12 such as a rotary for performing a tilling and crushing work that is a predetermined earth work is provided. The leveling means 13 is located behind the tillage means 12.
[0017]
A holder mounting body 15 as a holder mounting portion is fixed to a center portion in the vertical direction of each front edge portion of the pair of left and right side plates 11 so as to protrude forward from the front edge portion of the side plate 11. Yes.
[0018]
Each of the pair of left and right holder mounting bodies 15 has the same structure integrally formed of a metal material or the like, and each holder mounting body 15 is vertically fixed to the front surface of the side plate 11 as shown in FIG. A rectangular fixing plate 16 having a longitudinal direction is provided.
[0019]
A pair of projecting plates 17 projecting forward are formed at both ends of the fixing plate 16 in the width direction, and each projecting plate 17 has a rectangular shape with the projecting direction as the width direction.
[0020]
A plurality of, for example, two fixing holes, ie, a first fixing hole 18 and a second fixing hole 19 are formed in the vicinity of the two corners at the front end portions of the pair of protruding plates 17.
[0021]
Between the pair of protruding plates 17, a first stopper plate 21 and a second stopper plate 22, which are a pair of stopper plates that are spaced apart from each other, are installed, and the first stopper plate 21 and the second stopper plate 22 are These are formed in the same rectangular shape, and both end portions in the longitudinal direction are fixed to predetermined portions on the inner surface of the protruding plate 17. That is, the first stopper plate 21 is fixed to the upper side which is one end side in the longitudinal direction of the protruding plate 17 along an inclined direction slightly inclined in one direction with respect to the longitudinal direction, and the second stopper plate 22 is fixed to the protruding plate. 17 is fixed to the lower side which is the other end side in the longitudinal direction along an inclined direction slightly inclined in the other direction with respect to the longitudinal direction. The first stopper plate 21 and the second stopper plate 22 are provided with stopper means 23.
[0022]
Further, a spring hole 25 is formed in the vicinity of the center in the longitudinal direction at the rear end of one of the pair of projecting plates 17.
[0023]
Further, as shown in FIG. 3, a shaft insertion hole 26 is formed in a portion slightly forward of the center portion of one projecting plate 17, and the axial direction is horizontal in the shaft insertion hole 26. A support shaft 27 which is a coincident rotation shaft is rotatably inserted. The support shaft 27 includes a large-diameter portion 28 projecting outward from the outer surface of the projecting plate 17 and a small-diameter portion 29 having a smaller diameter than the large-diameter portion 28.
[0024]
Then, substantially the entire small diameter portion 29 of the support shaft 27 protrudes inward from the inner surface of the protruding plate 17, and a stand holder 30 is fixed to the tip of the small diameter portion 29. Further, it is rotatably attached to the holder attachment body 15 of the work machine frame 7 via the support shaft 27. That is, the pair of left and right stand holders 30 are arranged so that the support shaft 27 coincides with the fulcrum, that is, the center axis of the support shaft 27 so that the height of the connecting portion 4 of the tractor 1 and the connected portion 8 of the agricultural machine 3 can be adjusted. The rotation can be adjusted within a predetermined range about the rotation center axis X of the direction.
[0025]
The stand holder 30 is integrally formed of a metal material or the like into a cylindrical shape, and each of the upper end surface and the lower end surface is open. A stand connecting hole 31 is formed in the center of the stand holder 30 in the vertical direction.
[0026]
Further, as shown in FIG. 4, a spring contact portion 32 is formed on the upper front side of the stand holder 30, and an attempt is made to lower the ground height of the connection pin 9 of the connected portion 8 to the spring contact portion 32. The one end 34 of the torsion spring 33 as an urging means for reducing the load at the time is always in contact. The other end 35 of the torsion spring 33 is inserted into the spring hole 25 of the protruding plate 17 of the holder mounting body 15. The coiled portion 36 excluding the end portions 34 and 35 of the torsion spring 33 is disposed along the outer peripheral surface of the cylindrical member 37 fitted on the outer periphery of the small diameter portion 29 of the support shaft 27.
[0027]
Thus, as shown in FIG. 4, the torsion spring 33 is provided between the holder mounting body 15 and the stand holder 30 so as to be elastically deformable, and the stand holder 30 is oriented in a direction in which the upper end side of the stand holder 30 faces rearward. The upper rear side of the stand holder 30 is in contact with the first stopper plate 21 (in the clockwise direction in FIG. 4).
[0028]
In the state shown in FIG. 4, a fixing pin 39 as fixing means as setting means is removably inserted through the first fixing hole 18 of the holder mounting body 15, and the stand holder 30 is moved by the fixing pin 39. It is fixed with respect to the holder mounting body 15 and cannot rotate. When the fixing pin 39 is removed and the stand holder 30 is rotated counterclockwise in FIG. 4 until the lower rear side comes into contact with the second stopper plate 22 against the biasing force of the torsion spring 33, The fixing pin 39 can be removably inserted into the second fixing hole 19, and the stand holder 30 can be fixed in a non-rotatable state.
[0029]
On the other hand, as shown in FIG. 1, the farm work machine 3 is supported in a state where it is lifted on the ground by a stand device 41 dedicated to a three-point connection type farm work machine having a simple and inexpensive structure. The stand device 41 is composed of, for example, a pair of left and right stands 42 having the same structure. Note that the three-point connection type farm work machine has a three-point type connection portion corresponding to a three-point hitch type (three-point link hitch) connection portion of a tractor (not shown).
[0030]
Each stand 42 has a base portion 43 having a longitudinal direction in the front-rear direction, and casters 44 are attached to the lower surfaces of the front and rear end portions of the base portion 43.
[0031]
In addition, a slender cylindrical column portion 45 projects obliquely upward and forward from a position in front of the central portion in the longitudinal direction of the base portion 43, and a work machine connection hole ( (Not shown) is formed.
[0032]
In the state shown in FIG. 1, the connecting pin 46 as a connecting means is removably inserted into the working machine connecting hole of the support column 45 and the stand connecting hole 31 of the stand holder 30 so as to be detachable. The machine 3 is detachably attached to the support column 45 of the stand device 41, and the farm work machine 3 is held in a state of being lifted to the ground by the stand device 41.
[0033]
In the state shown in FIG. 1, the holder mounting body 15 rotates against the urging force of the torsion spring 33 with respect to the stand holder 30 based on its own weight on the work machine frame 7 side. And the second stopper plate 22 are in contact with each other, and the fixing pin 39 is inserted into the second fixing hole 19 so that the stand holder 30 is fixed to the holder mounting body 15.
[0034]
Next, the operation and the like of the one embodiment will be described.
[0035]
For example, as shown in FIGS. 1 to 3, when the connecting portion 4 of the tractor 1 is connected to the connected portion 8 of the agricultural machine 3, the height of the connecting hole 5 of the connecting portion 4 of the tractor 1 and the agricultural machine 3. When the height of the connecting pin 9 of the connected portion 8 is not equal to that of the connecting pin 9 and is shifted by H, the operator pulls out the fixing pin 39 from the second fixing hole 19 and then moves the front side of the farm work machine 3 downward. By pushing down, the work machine frame 7 is rotated downward and steplessly with the support shaft 27 as a fulcrum, so that the height of the connecting hole 5 and the height of the connecting pin 9 are matched.
[0036]
In other words, the stand holder 30 connected and fixed to the stand device 41 by the connecting pin 46 is rotated and adjusted relative to the holder mounting body 15 of the work machine frame 7 around the rotation center axis X, whereby the connecting pin The height of 9 is made low so that the height of the connection hole 5 and the height of the connection pin 9 are matched, and the connection work to the tractor 1 of the agricultural work machine 3 is performed.
[0037]
Since the load when trying to reduce the height of the connecting pin 9 of the connected portion 8 of the agricultural machine 3, that is, the force required to push down the front side of the agricultural machine 3 is reduced by the bias of the torsion spring 33, The operator can easily rotate and adjust the work machine frame 7 around the rotation center axis X. That is, the torsion spring 33 functions as an auxiliary means for assisting the pressing operation of the connected portion 8. Since the upper part of the stand holder 30 and the first stopper plate 21 come into contact with each other when the work machine frame 7 is rotated by a predetermined amount, the front side is pushed down too much until the farm work machine 3 is in an unstable posture. There is nothing.
[0038]
For example, when the connection pin 9 of the farm work machine 3 becomes lower than the connection hole 5 of the tractor 1, the worker lifts the front side of the farm work machine 3 upward and rotates the work machine frame 7 upward. Then, the height of the connecting hole 5 and the height of the connecting pin 9 are matched.
[0039]
On the other hand, for example, when the farm work machine 3 supported as being lifted to the ground by the stand device 41 is moved to a predetermined place using the casters 44 after the completion of the tilling work, the worker moves the fixing pin 39 to the fixed pin 39. By fixing the stand holder 30 and the holder mounting body 15 in a state where the farm equipment 3 is fixedly supported by the stand device 41, the farm equipment 3 is pushed later to be in a predetermined place such as a warehouse. Carry on.
[0040]
And according to the said one embodiment, the stand holder 30 is mounted in the horizontal direction so that the connecting hole 5 of the connecting portion 4 of the tractor 1 and the connecting pin 9 of the connected portion 8 of the agricultural machine 3 can be adjusted in height. Since rotation is possible about the rotation center axis X, the height of the connection hole 5 and the connection pin 9 of the tractor 1 can be increased without incurring troubles such as an increase in the number of parts of the stand device 41 and an increase in weight. As a result, the connecting operation to the tractor 1 can be easily performed. In addition, it is not necessary to prepare both the stand device 41 dedicated to the three-point connected farming machine and the stand device dedicated to the two-point connected farmer. For example, the manufacturer has advantages in terms of material management and inventory costs. There is.
[0041]
Further, by inserting the fixing pin 39 into the first fixing hole 18 or the second fixing hole 19, unintentional rotation of the holder mounting body 15 with respect to the stand holder 30, that is, unintentional movement of the work machine frame 7. The rotation can be prevented, and the support by the stand device 41 can be stabilized. Therefore, when the farm work machine 3 is transported using the stand device 41, the farm work machine 3 is not inadvertently shaken, and the farm work machine 3 is easily and stably moved to a predetermined place while using the stand device 41. Therefore, the moving work of the agricultural machine 3 can be performed efficiently and stably.
[0042]
Further, since the load when attempting to reduce the height of the connecting pin 9 of the connected portion 8 due to the biasing of the torsion spring 33 is reduced, the connection to the tractor 1 compared to the configuration in which the torsion spring 33 is not biased. Work can be performed even more easily.
[0043]
Further, the stopper means 23 constituted by the first stopper plate 21 and the second stopper plate 22 can appropriately prevent the stand holder 30 from rotating by a predetermined amount or more, and the farm work machine 3 is in an unstable posture. Can be prevented.
[0044]
Although the agricultural working machine 3 of the above embodiment has been described as including the fixing pin 39 for setting the stand holder 30 in a non-rotatable state, for example, although not illustrated, the agricultural working machine 3 includes the fixing pin 39. but it may also with no configuration.
[0045]
Further, although not shown, the stand holder 30 may have a configuration in which a plurality of the stand coupling holes 31 are arranged in parallel in the vertical direction at a predetermined interval.
[0046]
【The invention's effect】
According to the present invention, since the stand holder is rotatably attached to the holder mounting portion of the work machine frame, both the stand device dedicated to the two-point connected farm work machine and the stand device dedicated to the three-point connected farm work machine are provided. It is not necessary to prepare each, and it can be supported by using a conventional stand device dedicated to a three-point connected agricultural machine with a simple and inexpensive structure, and the height of the connecting part and the connected part of the traveling vehicle is high. It can be adjusted and can be easily connected to the traveling vehicle. In addition, the biasing means biases the holder mounting portion in a direction in which rotation of the holder mounting portion based on the weight of the work machine frame with respect to the stand holder is hindered. Thus, the connection work to the traveling vehicle can be performed more easily.
[Brief description of the drawings]
FIG. 1 is a side view showing an embodiment of an agricultural machine according to the present invention.
FIG. 2 is a side view of a connecting portion with the stand device of the agricultural working machine.
FIG. 3 is a front view of a connecting portion with the stand device of the agricultural working machine.
FIG. 4 is a side view showing a holder mounting body and a stand holder of the agricultural working machine.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Tractor as traveling vehicle 3 Agricultural work machine 4 Connection part 7 Work machine frame 8 Connected part
15 Holder mounting body as holder mounting part
23 Stopper means
25 Spring hole
30 Stand holder
Bas twisting as 33 biasing means Ne
X rotation center axis

Claims (3)

A work implement frame having a holder attachment portion and a connected portion connected to the traveling vehicle;
A stand holder attached to the holder attachment portion of the work machine frame so as to be rotatable about a horizontal rotation center axis so that the height of the connecting portion of the traveling vehicle and the connected portion can be adjusted; ,
The holder mounting portion is provided between the stand holder and the holder mounting portion, and biases the holder mounting portion in a direction to prevent rotation of the holder mounting portion with respect to the stand holder based on the weight of the work machine frame. An agricultural working machine comprising an urging means for The biasing means is a torsion spring,
One end of the torsion spring is always in contact with the stand holder, and the other end of the torsion spring is inserted into the spring hole of the holder mounting portion.
The agricultural machine according to claim 1. Stopper means that contacts the stand holder is provided so that the stand holder does not rotate more than a predetermined amount.
The agricultural machine according to claim 1 or 2, characterized in that.

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