JP2552083Y2 - Fertilizer nozzle support device for self-propelled fertilizer - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a self-propelled fertilizer of the type in which a fertilizer nozzle is inserted into soil while running and fertilizer is injected, and more particularly to a support device for the fertilizer nozzle.

[0002]

2. Description of the Related Art As described above, there is already known a self-propelled fertilizer which feeds liquid or paste-like fertilizer by sticking a traveling fertilizer nozzle into the soil. The fertilizer nozzle is supported by the upper and lower crankshafts to give a deformed circular motion to the fertilizer nozzle. It has been proposed to match the sending speed as much as possible.

Further, in such a case, in order to prevent the fertilizing nozzle from being bent by a speed difference between the running speed of the fertilizer and the peripheral speed of the crankshaft, when a bending force in the front-rear direction acts on the fertilizing nozzle, It is tilted forward and backward with respect to the crankshaft.

[0004]

However, in such a case, when the fertilizer application nozzle is rotated in the front-rear direction due to the above-mentioned speed difference, a spring for returning the nozzle to the neutral position after being pulled up from the soil is used. However, the structure was complicated and it was not easy to adjust the tension of the spring, that is, the return force of the fertilizing nozzle.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems and to provide a fertilizer nozzle support device having a simple structure and easily adjusting a return force. The upper and lower two crankshafts 6a and 6b are supported, and the crankshaft and a rod-shaped fertilizing nozzle 5a are connected by a crank arm 6d so as to be capable of vertically deforming and circular motion. The crank pin 6e provided on 6d is engaged with the long hole 8a of the bracket 8b provided on the fertilizing nozzle 5a side, and one end of two leaf springs 8c extending in the axial direction on both sides of the fertilizing nozzle 5a is fixed. This is a fertilizer nozzle support device for a self-propelled fertilizer that is provided with the other ends of two leaf springs 8c, 8c facing both sides of the crank pin 6e.

[0006]

[Operation] When the crankshafts 6a and 6b provided above and below the chain case 7h rotate in conjunction with each other, the crankpin 6e of the lower crankshaft 6b is connected to the fertilizing nozzle 5a by the 2
One of the leaf springs 8c is pressed to cause the fertilizing nozzle 5a to perform a circular motion. Fertilizer nozzle 5a in this circular motion
Is advanced into the soil, the traveling speed of the aircraft and the fertilizer nozzle 5a
A speed difference from the peripheral speed of the
The bending of c causes the fertilizing nozzle 5a to tilt. When the fertilizing nozzle 5a starts to ascend and retreats upward from the soil, the fertilizing nozzle 5a returns to the posture before tilting due to the elasticity of the leaf spring 8c.

[0007]

[Embodiment] The present invention will be described below with reference to the illustrated embodiment. In the figure, reference numeral 1 denotes a self-propelled fertilizer, and the fertilizer 1 is supported by a gauge wheel 2 in front of a fertilizer frame 1a and a driving wheel 3 in rear. That is, the fertilizer applicator frame 1a includes a front and rear frame 1c that supports the gauge wheel 2 via the telescopic cylinder 1b, a transmission case 3a that supports the drive wheel 3, and an engine support frame 4 that supports the engine 4.
a. Although not shown, the telescopic cylinder 1b is provided with a screw grip, which is operated to raise and lower the gauge wheel 2 to adjust the relative distance from the fertilizer nozzle 5a to adjust the fertilizer depth. Is configured to be set.

The front and rear frame 1c comprises a horizontal portion extending in the front and rear direction and a vertical portion extending upward at right angles from the front end thereof. A fertilizer pump 5 comprising four individual pumps is supported at the center of the horizontal portion. A distributor 5 for distributing the fertilizer sent from the fertilizer pump 5 to the left and right fertilizing nozzles 5a.
b and two vertically arranged crankshafts 6a and 6b are supported. Sub-frames 1d and 1e extending rearward are provided in a vertical portion of the fertilizer applicator frame 1a.
The sub-frames 1d and 1e support a pulley for power drive described later.

A steering handle 3b is supported at the upper end of a transmission case 3a extending obliquely upward in the direction of the fertilizer applicator frame 1a, and two engines having an L-shaped cross section provided at the front side thereof. The engine 4 is mounted on the support frame 4a. Reference numeral 4b denotes a fertilizer tank provided above the engine, and a fuel tank 4c is provided in a through hole provided in the center thereof. Next, a method of feeding fertilizer by the fertilizer pump 5, the distributor 5b, and the like and transmitting power for raising and lowering the fertilizer application nozzle 5a will be described.

That is, the rotation of the engine 4 is controlled by the V belt 7
The lower fertilizer pump 5 and the upper second intermediate shaft 7d are transmitted from the first intermediate shaft 7b to the rear transmission case 3a and the first intermediate shaft 7b via the chain 7c. . The rotation of the second intermediate shaft 7d is transmitted to the third intermediate shaft 7f via the chain 7e, from which the distributor 5b and the lower crankshaft 6b are driven. The upper crankshaft 6a is driven by the lower crankshaft 6b via a chain case 7h.

Next, a feeding means for feeding the fertilizer stored in the fertilizer tank 4b to the fertilizing nozzle 5a will be described.
The fertilizer tank 4b is connected to the suction side of the fertilizer pump 5 by a thick pipe 5c connected to the lower surface. As shown in FIG. 2, on the discharge side of the fertilizer pump 5, a feed pipe 5e toward the distributor 5b and a return pipe 5f returning to the fertilizer tank 4b via a switching valve 5d for each individual pump are connected. . The fertilizer sent to the distributor 5b is configured to be fed to the fertilizing nozzle 5a by two left and right feed pipes 5h.

The lifting mechanism 8 of the fertilizing nozzle 5a according to the present invention will now be described. As shown in FIGS. 3 and 4, the lifting mechanism 8 includes two upper and lower crankshafts 6a and 6b supported by the fertilizer applicator frame 1a.
Each of a and 6b has a shaft portion, a crank arm 6d, and a crank pin 6e. And the upper and lower crankshafts 6a,
The fertilizer application nozzle 5a is connected to the fertilizer application nozzle 5a in a circular motion via the crank pin 6e. In particular, the crank pin 6e provided on the lower crank arm 6d and the fertilizer application nozzle 5a are provided with a long hole 8a. Bracket 8 provided on the side
b. As a result, as shown in the right half shown by a virtual line in FIG.
a can be tilted back and forth around the upper crank pin 6a.

Two returning leaf springs 8c, 8c are provided before and after along the fertilizing nozzle 5a.
This is to return to the neutral position after a has advanced into the soil and tilted, or when it has escaped from the soil. That is, the return leaf springs 8c, 8c are supported with the fertilizer application nozzle 5a interposed therebetween, and are bolted at the upper end, and the lower end is set to face the side surface of the crankpin 6e.

In this example, as shown in FIG. 4, the leaf spring 8c forms an inverted triangle in which the width of the plate is gradually reduced from the upper part to the lower part, and is configured as an equal stress beam as a whole. Care has been taken to minimize the length of the leaf spring relative to its size. 5d is a leaf spring 8c.
Is a stopper for preventing the lower end of the lens from being biased. In this embodiment, as shown by a solid line in FIG. 3, a slight gap is interposed between the lower end of the leaf spring 8c and the crank pin 6e. However, this form is not necessarily required.
The contact may be made with a preload. In this embodiment, the leaf spring 8c is supported by the fertilizing nozzle 5a on the upper side of the bracket 8b. However, the leaf spring 8c is supported upside down and supported on the lower side of the bracket 8b, and there is no problem even if it is extended upward. Of course it is.

Since the device according to the present invention is configured as described above, when the fertilizer nozzle 5a advances into the soil during the operation of the fertilizer applicator 1 and rotates about the upper crank pin 6e as an axis, the lower fertilizer nozzle 5a rotates. The crank pin 6e moves from the neutral position to one end in the elongated hole 8a, and as a result, one of the leaf springs 8c is bent like the right half shown by the phantom line in FIG. Then, the fertilizer applicator 1 continues to advance and the fertilizer nozzle 5
When a comes out of the soil, the fertilizing nozzle 5a is moved to the leaf spring 8c.
With the elasticity of, it returns to the original posture shown in the left half.

As shown in FIG. 4, the gauge wheel 2 is composed of a pair of left and right parts, the upper parts of which are inclined in a direction approaching each other, and are formed in a toe-out with a so-called reverse camber angle α. I have. By attaching the gauge wheel 3 to the member supported by the telescopic cylinder 1b of the fertilizer applicator frame 1a in this way, the reaction force when the fertilizing nozzle 5a pierces the soil is supported by the opposite gauge wheel 2, and the reaction force This prevents the body from swinging. When the gauge wheel 2 and the fertilizer application nozzle 5a are arranged inside and outside the machine body as in this embodiment, both can be arranged close to each other, and the fertilization depth can be stabilized.

As shown in FIGS. 1 and 2, one switching valve 5d is provided for a plurality of fertilizer pumps 5 so that the fertilizer can be turned on and off while the pump 5 is running.
F becomes possible, and the rate of return of fertilizer is reliable, and it is possible to cope with changes in the amount of fertilizer in multiple stages. Further, unnecessary fertilizer can be returned to the fertilizer tank 4b before being supplied to the distributor 5b, and the flow of the fertilizer can be made smooth.

[0018]

The fertilizer application nozzle support device of the self-propelled fertilizer according to the present invention supports the upper and lower two-axis crankshafts 6a and 6b on the fertilizer applicator frame 1a, and forms a rod-shaped fertilizer nozzle 5a with the crankshaft. Are connected to each other by a crank arm 6d so as to be capable of vertically deforming circular movement, and the lower crank shaft 6
b, the crank pin 6e provided on the crank arm 6d is engaged with the long hole 8a of the bracket 8b provided on the side of the fertilizing nozzle 5a, and extends axially on both sides of the fertilizing nozzle 5a.
One end of the two leaf springs 8c is fixed, and the two leaf springs 8c are fixed.
The other ends of c and 8c are provided to face both sides of the crank pin 6e.

Therefore, the stopper of the leaf spring 8c for returning the fertilizing nozzle 5a to a predetermined position is not required, and the configuration is extremely simple. The restoring force of the fertilizing nozzle 5a can be adjusted by changing the thickness and the number of the leaf springs 8c. Further, when the fertilizer application nozzle 5a enters the soil and inclines, the bracket 8b can be inclined in the range of the long hole 8a, so that a large load is not applied to the fertilizer application nozzle 5a.

[Brief description of the drawings]

FIG. 1 is a side view of a self-propelled fertilizer applicator.

FIG. 2 is a diagram of a fertilizer feeding system.

FIG. 3 is an enlarged side view of a support structure of the fertilizing nozzle.

FIG. 4 is a front view of the self-propelled fertilizer applicator.

FIG. 5 is an enlarged perspective view showing a return spring portion of the fertilizing nozzle.

[Explanation of symbols]

5a Fertilizer application nozzle 6a Upper crankshaft 6b
Lower crankshaft 6d Crank arm 6e Crank pin.

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-2-182105 (JP, A) JP-A-2-156814 (JP, A) JP-A-2-90922 (JP, U) JP-A-2-182105 14916 (JP, U)

Claims (1)

(57) [Scope of request for utility model registration] An upper and lower two-axis crankshaft 6a, 6b is supported on a fertilizer applicator frame 1a, and the crankshaft and a rod-shaped fertilizing nozzle 5a are connected by a crank arm 6d so as to be capable of vertically deforming circular motion. Lower crankshaft 6
b, the crank pin 6e provided on the crank arm 6d is engaged with the long hole 8a of the bracket 8b provided on the side of the fertilizing nozzle 5a, and extends axially on both sides of the fertilizing nozzle 5a.
One end of the two leaf springs 8c is fixed, and the two leaf springs 8c are fixed.
A fertilizer nozzle support device for a self-propelled fertilizer, wherein the other ends of c and 8c are provided opposite to both sides of the crank pin 6e.