JP3891729B2 - Fertilizer applicator - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a fertilizer applicator capable of discharging and injecting a paste-like fertilizer, a soil conditioner, a disinfectant, or the like into the ground of a root portion of vegetables or the like.
[0002]
[Prior art]
Conventionally, a fertilizer applicator as described above has been proposed, for example, as disclosed in Japanese Patent Application Laid-Open No. 61-5714.
[0003]
[Problems to be solved by the invention]
The fertilizer applicator configured as shown in the above prior art is configured with a fertilizer tank by placing a fertilizer tank that contains fertilizer and a fertilizer section that has a fertilizer nozzle that fills and discharges the fertilizer into the ground before and after the machine base. The fertilizer application device is attached to the rear portion of the tractor via a three-point link mechanism.
[0004]
For this reason, when the fertilizer nozzle of the fertilizer section installed at the rear part of the machine base of the fertilizer device is moved up and down and driven into the ground, a large driving reaction force moment is exerted on the three-point link mechanism side by the driving reaction force of the fertilizer nozzle. As a result, the vibration of the machine base is increased and the support of the three-point link mechanism is unstable, and there is a problem that the support structure for solving this problem becomes complicated.
[0005]
In addition, the fertilizing device in which the fertilizer section is arranged at the rear of the fertilizer tank as described above has a problem in that, when the body is increased in size rearwardly, the turning radius of the headland and the like is increased and workability is deteriorated. .
[0006]
[Means for Solving the Problems]
The underground fertilizer application machine of the present invention for achieving the above object is configured as follows.
[0007]
First, the lower part of the frame-shaped machine base 3 mounted on the rear part of the traveling machine body 1 via the three-point link mechanism 1a is supported by two tail wheels 3a arranged on the left and right, and the upper part of the machine base 3 The fertilizer is provided with a fertilizer tank 20 containing fertilizer and the like, a fertilizer section 4 for fertilizing in the ground by a fertilizer nozzle 21 that moves up and down, and a fertilizer pump 2P for feeding fertilizer from the fertilizer tank 20 to the fertilizer section 4 In the apparatus 2, a fertilizer pump 2 </ b> P is arranged at a substantially central part of the front part of the machine base 3, a fertilizer tank 20 is arranged at the rear part, and a tool bar 30 for attaching the fertilizer part 4 is arranged on both sides of the front part of the machine base 3. Two sheets are supported horizontally by a vertical frame 31 standing upright, and the left and right lower links 10 of the three-point link mechanism 1a are connected to the vertical frame 31 and the top links 11 are arranged on the left and right of the center of the tool bar 30. Top link bracket It is characterized by being configured to be coupled to 2. Secondly, the two top link brackets 32 connected to the top link 1 of the three-point link mechanism 1a are provided in the central portion of the toolbar 30, and the fertilizer frame 40 constituting the fertilizer section 4 and the toolbar 30 are provided. The mounting bracket 47 is connected to the two top link brackets 32 so as to be installed between the two top link brackets 32.
(About device operation)
If it demonstrates with reference to embodiment mentioned later, the fertilizer applicator A which concerns on this invention is set as the structure which supported the base 3 on the two-wheeled tail wheel 3a by the three-point link mechanism 1a in the rear part of the traveling body 1. FIG. Therefore, this machine base 3 has excellent followability to the traveling machine body 1. However, the fertilizer 4 is configured to enter and fertilize by moving up and down the fertilizer nozzle 21, and the balance of the machine base 3 supported by the two tail wheels 3a is poor and stable fertilization. The operation is impossible.
Therefore, in the present invention, the first configuration is an arrangement configuration that takes into account the balance of the device while improving the followability to the traveling machine body 1, and efficiently performing fertilization operation to the target location. Can do it.
In the embodiment described in detail, the second configuration is provided with two sets of fertilizers 4, but in reality, not only two fertilizers but also three fertilizers may be used. is there. Therefore, the structure is such that a space can be secured behind the two top link brackets 32 connecting the three-point link mechanism 1a so that another fertilizer 4 can be added.
Since it is configured as described above, the fertilizer nozzle 21 for applying fertilization into the ground by lifting and lowering while keeping the balance of the machine base 3 while keeping the balance of the machine base 3 while following the movement of the traveling machine body 1 accurately by the three-point link mechanism 1a. It can be easily operated and efficiently fertilized into the ground.
[0008]
Secondly, the tool bar 30 to which the fertilizer unit 4 is attached is supported horizontally by the vertical side frames 31 erected on both sides of the front part of the machine base 3, and the left and right lower links 10 of the three-point link mechanism 1a are supported by the vertical side frame 31. The top link 11 is connected to and supported by a top link bracket 32 provided at the center of the tool bar 30.
Thirdly, two top link brackets 32 are provided on the left and right sides, and the distance between both is formed wider than the attachment interval of the fertilizer 4.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
A is a fertilizer applicator in which a fertilizer application device 2 is detachably attached to the rear portion of the tractor (traveling machine body) 1 by a three-point link mechanism 1a.
[0010]
The three-point link mechanism 1a of the tractor 1 is composed of left and right lower links 10 and 10 similar to the conventional apparatus, a top link 11 installed at the upper center of the tractor 1, a lift rod 12, and the like. An input shaft 15 is provided between 10 and 10, thereby driving the fertilizer.
[0011]
And as for the said fertilizer application 2, as shown in FIGS. 1-3, the fertilizer tank 20 which accommodated the fertilizer etc. for underground filling on the machine stand (fertilization frame) 3 which has the tail wheel 3a, 3a in the rear part, In the fertilizer application device 2 comprising a fertilizer application unit 4 that applies fertilizer into the ground by a fertilization nozzle 21 that moves up and down, and a fertilizer pump 2P (FIG. 3) that feeds fertilizer from the fertilizer tank 20 to the fertilizer application unit 4. The fertilizer pump 2P and the fertilizer tank 20 are arrange | positioned in the position before and behind, and also the fertilizer part 4 is installed between both.
[0012]
And the said machine base 3 supports the tool bar 30 which attaches the fertilizer part 4 horizontally between the vertical side frames 31 standingly arranged in the front both sides of the machine base 3, and the left and right lower links 10 of the three-point link mechanism 1a, 10 is connected to the two vertical frames 31 and 31, and the top link 11 is supported by a top link bracket 32 provided at the center of the tool bar 30, so that the fertilizer application device 2 is supported by the tractor 1 so as to be movable up and down. The fertilization work can be performed at a predetermined depth while towing while the tail wheels 3a and 3a are grounded. Reference numerals 31 a and 31 a are support pins for connecting the lower links 10 and 10 provided in the vertical frames 31 and 31, and 32 a is an attachment hole for connecting the top link 11 provided in the top link bracket 32.
[0013]
In addition, the illustrated machine base 3 is provided with two front and rear frames 33 with a space at which another fertilizer 4 can be installed between the fertilizer nozzles 21 of the fertilizer 4 arranged on the left and right sides, and the front side of the machine base 3 is arranged in the vertical direction. The side frames 31 are connected to the lower surface of a plate-like base table 35 erected on both sides, and the rear side is composed of two horizontal frames 36 and 36 that can stably place the fertilizer tank 20 and the hydraulic oil tank 5 on the left and right. Connected to form an integral rigid frame.
[0014]
Then, on both sides of the front lateral frames 36, 36, the tail wheel 3a, 3a is supported by the longitudinal axis 37 of the wheel so as to be vertically adjustable as shown in FIG. 3, thereby positioning the vehicle height by the tail wheel 3ap 3a. The fertilization depth of the fertilization nozzle 21 can be set easily and accurately.
[0015]
Further, an input shaft 15 that is input from the PTO shaft 13 (FIG. 1) via the joint shaft 13a is input into a square space formed by the base 35, the left and right vertical frames 31, and the upper toolbar 30. As shown in FIG. 3, the fertilizer pump 2 </ b> P and the hydraulic pump 50 installed on the upper side and the right side of the input shaft 15 are provided so as to be able to transmit a belt separately from each other. Thus, this transmission part is put together in a compact manner and the guard is provided by each frame.
[0016]
The hydraulic operation valve 52 (FIG. 2) connected via the hydraulic pump 50, the hydraulic tank 5 and the filter 51 is connected via a nozzle raising / lowering mechanism 6 (FIG. 5) and an oil pipe 53 (FIG. 3) of the fertilizer section 4 described later. The fertilization nozzle 21 can be reciprocated up and down by reciprocating the lifting cylinder 60 with a predetermined timing operation. In addition, the filter 51 is provided in a space that is recessed in the front lower portion of the hydraulic oil tank 5.
[0017]
The fertilizer application apparatus 2 which comprises the machine base 3 as described above and has the respective devices and the fertilizer section 4 is configured so that the top link 11 is pivoted by pins inserted into the mounting holes 32a of the top link brackets 32 provided on the left and right. I try to support it.
[0018]
Further, by providing the gap between the left and right top link brackets 32 to be slightly wider than the width of the mounting bracket 47 of the fertilizer frame 40 shown in FIGS. 3 and 4, an additional fertilizer 4 between the left and right top link brackets 32 is provided. Can be easily attached by means similar to those described above.
[0019]
Next, the structure of the fertilizer application part 4, its attachment structure, etc. are demonstrated.
In this fertilizer application device 2, a nozzle lifting mechanism 6 that moves the fertilizer nozzle 21 up and down and a discharge pump 22 that feeds fertilizer when the fertilizer nozzle 21 is lowered are integrally formed on a fertilizer frame 40 attached to the left and right sides of the tool bar 30. In the fertilizer device 2 having the fertilizer section 4 configured as described above, the nozzle elevating mechanism 6 is provided with guide rods 41a and 41b for raising and lowering the fertilizer nozzle 21 and a conversion link 42 between the guide rod 41a and the discharge pump 22. As shown in FIG. 5 (A, B, C), a swinging motion is given to the conversion link 42 by the downward motion of the guide rod 41a to switch the discharge pump 22 to the fertilizer discharge posture. The conversion link 42 is provided with a discharge switching valve 7 for switching so that the fertilizer delivered by the discharge pump 22 is discharged from the fertilizer nozzle 21. There.
[0020]
Accordingly, the fertilizer fed from the fertilizer tank 20 via the fertilizer pump 2P (FIG. 3) is operated toward the fertilizer nozzle 21 side by operating the discharge pump 22 at the descending stalk operation end (lowermost position) of the fertilizer nozzle 21. Thus, the fertilizer can be discharged from the nozzle hole 21a of the fertilizer nozzle 21 into the ground vigorously and accurately by switching the opening of the discharge switching valve 7 with an opening amount set in accordance with this timing. ing.
[0021]
Further, as shown in FIG. 4, the fertilizer section 4 pivots a fertilizer frame 40 on the tool bar 30 via a horizontal axis 45 so that the fertilizer section 4 can be rotated in the front-rear direction as shown in FIG. I support it. Then, the fertilizer application frame 40 is pivotally supported with respect to the tool bar 30 via the vertical axis 48 (the longitudinal direction with respect to the machine base 3), so that the fertilizer 4 can be rotated in the left-right direction as shown in FIG. I support it.
[0022]
Therefore, even when the machine body travels forward and the machine base 3 swings left and right due to unevenness of the ground, an unreasonable load is applied to the fertilizing nozzle 21 inserted into the ground, causing it to break. It is possible to prevent that.
[0023]
That is, as shown in FIG. 4, the fertilizer 4 has a long plate-shaped fertilizer frame 40 and a support plate 46 having a horizontal shaft 45 pivotally supported on the back surface slightly above the middle. The tool bar 30 is fastened and fixed by a mounting bracket 47 having a bifurcated mounting part 47a fitted to the tool bar 30 from one side and a cover plate 47b.
[0024]
Further, the fertilizer frame 40 is horizontally inserted by inserting the longitudinal axis 48 of the mounting bracket 47 integrally into a support hole 46a projecting from the mounting bracket 47 side and drilled in the central portion of the support plate 46. It is supported so that it can rotate.
[0025]
Further, the hole 47c of the mounting bracket 47 is formed larger than the hole of the pin 49, the pin 49 is inserted into the screw hole N, and the support plate 46 and the pin 49 are integrally formed by screwing. Therefore, the fertilizer frame 40 can be swung left and right by the angle [α].
[0026]
As shown in FIG. 4, screw holes N formed on a radius centering on the vertical axis 48 having a vertical axis 48 as a fulcrum and having a driving angle (inclined driving angle) [β] below and on both sides thereof. L and R are provided, and the restriction pin 49 is alternatively screwed into and fixed to the screw holes N, L, and R, so that the insertion angle of the fertilizer application nozzle 21 is set to the vertical posture and the angle in the left and right direction [β Can be selected alternatively, such as adapting to the shape of the ridge or the inclination of the field so that the fertilizer nozzle 21 can be properly driven into the ground from a suitable direction for the crop and fertilized. I have to.
[0027]
In the fertilizer nozzle 21, the fertilizer frame 40 pivots back and forth by an angle [α] with the horizontal shaft 45 as a pivot, and the center of gravity of the fertilizer section 4 is positioned below the horizontal shaft 45. After the fertilizer nozzle 21 comes out of the ground, it returns to its original posture by contacting the stopper 47d by its own weight.
[0028]
Further, since the stopper 47d is dimensioned so that the fertilizer 40 is inclined forward, the fertilizer nozzle 21 starts to be driven into the ground in the forward inclined posture and becomes substantially vertical near the bottom dead center. It can be done effectively.
[0029]
Therefore, as shown in FIG. 2, when the fertilizer nozzle 21 starts to be driven in the standby position (X) and is inserted into the ground, the maneuvering nozzle 21 is moved from the insertion of the fertilizer nozzle 21 to the pulling-out, along with the progress of the airframe. The posture of the fertilizer application nozzle 21 can be rotated from (X) to (Y), (Z) about the horizontal axis 45. Accordingly, the driving reaction force of the fertilizing nozzle 21 can be concentrated on the horizontal axis 45 and received.
[0030]
Next, the detailed structure of the fertilizer application part 4 is demonstrated with reference to FIGS.
As shown in the figure, in the rear view, the fertilization frame 40 is provided with the nozzle lifting mechanism 6 at the lower right side thereof, the discharge pump 22 at the upper left side, and a character-shaped conversion link 42 between the two. And the fertilization nozzle 21 is arrange | positioned up and down.
[0031]
The nozzle elevating mechanism 6 is fixed to the fertilizer frame 40 in parallel with the elevating cylinder 60 in the vertical direction, and the elevating cylinder 60 provided with a holder 62 for fixing the fertilizer nozzle 21 to the lower end of a piston rod 61 that expands and contracts downward. And a guide rod 41 that is slidably supported in the support tube 63 and that has a lower end fixed to the holder 62 and an operation portion 65 for operating the conversion link 42 at the upper end. .
[0032]
As shown in FIG. 7, the operating portion 65 is a roller 65 a that is rotatably supported from the guide rod 41 toward the conversion link 42, and is positioned above the contact surface 42 a of the conversion link 42. Yes. The fertilizer nozzle 21 has a flexible fertilizer pipe 21b with a check valve connected to the discharge side of a discharge switching valve 7 described later connected to the upper end of the cylinder shaft.
[0033]
On the other hand, the conversion link 42 is formed by two link plates formed in a square shape as shown in FIGS. 6 and 7, a roller 42b is rotatably provided at the left end thereof, and the fertilizer frame 40 is provided in the middle of both link plates. The guide rod 41a is pivotally supported by a support shaft 66, and a guide rod 41a is sandwiched between the right contact surfaces 42a. A roller 42c that comes into contact with a valve 70 of a discharge switching valve 7 (to be described later) in the middle of the contact surface 42a is rotatably provided on the right side of the two link plates 42 formed in a U-shape. Further, the roller 42b is held in a posture pressed against the head of the discharge pump rod 22a tensioned by a spring.
[0034]
Then, the operating portion 65 is moved downward by the extension of the nozzle raising / lowering mechanism 6, and the roller 65 a comes into contact with the contact surface 42 a of the conversion link 42, and the process proceeds from FIG. 5A to FIG. To do.
[0035]
In the meantime, the roller 42b provided at the left end of the conversion link 42 pushes the discharge pump rod 22a in the fertilizer pumping direction, and the fertilizer fed from the fertilizer pipe 21c side on the fertilizer pump 2P side through the check valve structure. Is fed from the fertilizer pipe 21d (FIG. 5) side to the fertilization nozzle 21 side through the discharge switching valve 7.
[0036]
At this time, the discharge switching valve 7 communicating with the fertilizer pipe 21c communicates the fertilizer pipe 21d side with the fertilizer pipe 21b of the fertilizer nozzle 21, so that the valve 70 is as shown in FIG. When the operation pin 42c of the conversion link 42 is brought into contact and press-fitted, the fertilizer is discharged from the nozzle hole 21a in a timely and accurate manner at the position where the fertilizer nozzle 21 is lowered, so that the fertilizer is deeply and well fertilized. It is something that can be done.
[0037]
When the fertilizer nozzle 21 enters the ascending process (CBA in FIG. 5), the operating portion 65 releases the pressure of the conversion link 42 (the conversion link 42 rotates counterclockwise), and the valve 70 quickly springs. , And the discharge pump rod 22a is also returned by the force of the spring to stop the feed of the fertilizer, so that unnecessary discharge of the fertilizer when the fertilizer nozzle 21 is raised can be reliably prevented.
[0038]
Accordingly, the fertilizer section 4 configured as described above is provided by the conversion link 42 that swings and pivots around the support shaft 66 by the operation section 65 that moves up and down integrally with the fertilizer nozzle 21 by the operation of the nozzle lifting mechanism 6. The discharge pump 22 and the discharge switching valve 7 can be operated simultaneously with a predetermined link ratio, and a compact discharge mechanism is integrated on the fertilizer frame 40 as a simple and inexpensive structure, while the nozzle hole 21a associated with the pressure feeding of the fertilizer. There is a feature that it is possible to accurately fertilize the discharge from the top at a lowered position with good timing.
[0039]
As shown in FIG. 7, the discharge switching valve 7 includes a fertilization amount adjusting mechanism 9 that can easily adjust the operation stroke of the valve 70 by advancing and retreating with respect to the conversion link 42. The discharge amount of the fertilizer in the lowered position portion can be easily adjusted with a simple configuration.
[0040]
That is, the fertilizer application amount adjusting mechanism 9 has an adjustment plate 93 having a plurality of adjustment holes 92 through which the left and right adjustment screws 90 and 91 can be inserted on substantially the entire lower side, and a length that allows the left adjustment screw 90 to be inserted. A hole 95 and a screw hole 97 through which the right adjustment screw 91 is inserted are configured to overlap each other, and the discharge switching valve 7 is fixed above the adjustment plate 93.
[0041]
With this configuration, when the adjustment plate 93 is moved and fixed to the fertilization frame 40 with the adjustment screws 90 and 91, the stroke of the valve 70 associated with the operation of the conversion link 42 is maximized and the fertilizer is discharged at the maximum amount. Can be. Further, if the adjustment plate 93 is shifted and attached to the left, the stroke of the valve 70 can be reduced to reduce the amount of fertilizer discharged.
[0042]
With this configuration, while the operation of the discharge pump rod 22a is constant, the amount of fertilizer discharged by the fertilizer application nozzle 21 can be easily adjusted by a simple configuration that only adjusts the stroke of the discharge switching valve 7. There are advantages.
[0043]
Further, the fertilizer application device 2 configured as described above performs an air bleeding operation of the fertilizer circuit by an operation changeover switch 80, an empty operation without discharging fertilizer, and fertilization work by operating the control box 8 as shown in FIG. Automatic operation can be performed alternatively.
[0044]
Further, the nozzle number changeover switch 81 alternately applies fertilizer one by one from the left and right fertilizers 4, or alternatively applies fertilizer from one fertilizer 4 and newly attaches the fertilizer 4 to the top link bracket 32. In this case, it is possible to perform fertilization from the left and right and the center and the three fertilization nozzles 21.
[0045]
The underground fertilizer application machine according to the present invention configured as described above first sets the fertilizer application adjusting mechanism 9 to a desired fertilizer discharge amount, and then adjusts the height of the tail wheel 3a to set the fertilizer application depth by the fertilizer nozzle 21. Thereafter, when the machine body is driven forward, the fertilizer section 4 moves the fertilizer nozzle 21 up and down at a predetermined stroke and timing through the lift cylinder 60 by the operation of the hydraulic pump 50 and the fertilizer pump 2P.
[0046]
Then, since the fertilizer nozzle 21 discharges the fertilizer into the soil at the lowered position via the discharge pump 22 and the discharge switching valve 7 on the fertilizer frame 40, a predetermined amount of spot fertilization can be performed satisfactorily at a predetermined depth. Is.
[0047]
In such fertilization work, the fertilizer unit 4 pivotally supports the fertilizer frame 40 on the tool bar 30 via the horizontal axis 45, so that the machine body is removed while the fertilizer nozzle 21 starts to be driven into the soil. 2, as shown in FIG. 2, the fertilization nozzle 21 freely swings back and forth (X), (Y), and (Z), so that the fertilization nozzle 21 moves up and down smoothly. In addition, the fertilizer application nozzle 21 is not overloaded.
[0048]
Further, even if the fertilizer application apparatus 2 rolls while the fertilizer nozzle 21 is driven into the ground, the fertilizer section 4 in which the fertilizer frame 40 is pivotally supported on the tool bar 30 via the vertical axis 48 is shown in FIG. Since the left and right heads are swiveled around the vertical axis 48, the fertilization nozzle 21 can be smoothly moved up and down in the same manner as described above, and the fertilization work can be performed well, and damage to the fertilizer nozzle 21 and the like can be prevented. Can do.
[0049]
Further, a fertilizer tank 20 containing fertilizers for filling the ground, a fertilizer unit 4 for applying fertilizer into the ground by a fertilizer nozzle 21 that moves up and down, and fertilizer for feeding fertilizer from the fertilizer tank 20 to the fertilizer unit 4 In the fertilizer application device 2 provided with the pump 2P, the fertilizer pump 2P and the fertilizer tank 20 are arranged before and after the machine base 3, the fertilizer section 4 is installed between them, and the tool bar 30 for attaching the fertilizer section 4 is provided. A vertical frame 31 erected from both sides of the front part of the machine base 3 is supported horizontally, and the left and right lower links 10 and 10 of the three-point link mechanism 1a are connected to and supported by the vertical frames 31 and 31. Is connected to and supported by a top link bracket 32 provided at the center of the tool bar 30, so that a transmission system such as a fertilizer pump 2 </ b> P is compacted on the side close to the tractor 1. Structure can be combined with good balance while adopting a, it is possible to provide an inexpensive fertilizer device 2.
[0050]
In the fertilization work, the fertilizer section 4 is supported on the tool bar 30 provided in the horizontal direction by the vertical frame 31 on the front side of the machine base 3, so that the reaction force at the time of driving accompanying the lowering of the fertilizer nozzle 21 is applied to the tool bar 30. And distributed to the top link bracket 32 and the vertical frame 31 arranged vertically, and can be supported on the top link 11 and the lower links 10 and 10 of the three-point link mechanism 1a in a state where the reaction force moment is reduced. Therefore, the fertilization work can be performed satisfactorily by suppressing the reaction force vibration of the airframe while stably supporting the fertilizer 4.
[0051]
【The invention's effect】
As is apparent from the above description, according to the fertilizer applicator of the present invention, the fertilizer pump 2P and the fertilizer tank 20 are arranged before and after the machine base 3, and the fertilizer section 4 is provided between the two to link the traveling machine body 1 with three points. By supporting and transmitting via the mechanism 1a, the transmission structure from the tractor 1 can be simplified. And the reaction force moment at the time of driving-in of the fertilizer nozzle 21 of the fertilizer part 4 can be suppressed, and fertilization work can be performed favorably.
[0052]
Further, the fertilizer 4 can be stably supported on the middle portion between the top link bracket 32 and the vertical frame 31 connected to the three-point link mechanism 1a up and down, and the reaction force when driving the fertilizer nozzle 21 is improved. Can receive.
[0053]
Further, by using the top link bracket 32 connected to the three-point link mechanism 1a as the attachment portion of the additional fertilizer section 4, the driving reaction force of the fertilizer nozzle 21a of the fertilizer section 4 is not biased left and right.
[Brief description of the drawings]
FIG. 1 is a side view showing a state in which a fertilizer applicator according to the present invention is mounted on a tractor.
FIG. 2 is a side view of the fertilizer application apparatus.
FIG. 3 is a rear view of FIG. 2;
4A is a side view showing a fertilizer mounting structure, and FIG. 4B is a front view thereof.
FIG. 5 shows the structure and operation of the fertilizer application section, (A) is a rear view showing the standby posture of the fertilizer nozzle, (B) shows the initial posture of the fertilizer nozzle, and (C) shows the fertilizer nozzle 21 The mode of the lowest position is shown.
FIG. 6 is a plan view of a fertilizer application part.
FIG. 7 is a rear view showing a configuration of a conversion link and a discharge switching valve of a fertilizer application unit.
8A is a plan view of a control box, and FIG. 8B is a rear view of FIG. 8A.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Tractor 1a Three-point link mechanism 2 Fertilizer 3 Machine stand 4 Fertilizer part 5 Hydraulic oil tank 6 Nozzle raising / lowering mechanism 7 Discharge switching valve 10, 10 Lower link 11 Top link 20 Fertilizer tank 21 Fertilizer nozzle 22 Discharge pump 30 Tool bar 41a, 41a Guide杆 42 Conversion link 45 Horizontal axis 48 Vertical axis 50 Hydraulic pump 51 Discharge switching valve 52 Operation valve 60 Lifting cylinder 65 Actuator 70 Valve

Claims (3)

The lower part of the frame-shaped machine base 3 mounted on the rear part of the traveling machine body 1 via the three-point link mechanism 1a is supported by two tail wheels 3a arranged on the left and right sides, and fertilizers are placed on the upper part of the machine base 3 In the fertilizer application apparatus 2 comprising the accommodated fertilizer tank 20, the fertilizer unit 4 that fertilizes the ground with the fertilizer nozzle 21 that moves up and down, and the fertilizer pump 2 </ b> P that feeds fertilizer from the fertilizer tank 20 to the fertilizer unit 4. A vertical fertilizer pump 2P and a fertilizer tank 20 are arranged at a substantially central portion of the front portion of the machine base 3 and a tool bar 30 for attaching the fertilizer portion 4 is erected on both sides of the front portion of the machine base 3. Two top link brackets 32 that are supported laterally by the side frame 31 and connect the left and right lower links 10 of the three-point link mechanism 1 a to the vertical side frame 31 and the top links 11 are arranged at the left and right of the center of the tool bar 30. Ream Fertilization machine, characterized by being configured to. The two top link brackets 32 connected to the top link 1 of the three-point link mechanism 1a are provided in the center of the tool bar 30, and a mounting bracket 47 for connecting the fertilizer frame 40 constituting the fertilizer 4 and the tool bar 30 is provided. The fertilizer applicator according to claim 1, wherein the fertilizer is configured to have a width that can be installed between the two top link brackets 32 .   The fertilizer applicator according to claim 1 or 2, wherein two top link brackets (32) are provided on the left and right sides, and the distance between the top link brackets (32) is wider than the mounting interval of the fertilizer section (4).

Images