JP3520230B2 - Manure spreader - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fertilizer spreader equipped with fertilizer stirring means for stirring fertilizer in a tank.

[0002]

2. Description of the Related Art Conventionally, a self-propelled fertilizer sprayer for spraying fertilizer by centrifugal force while self-propelled has, as shown in FIG. 5, a drive wheel 1a (1b), which is a pair of left and right front wheels, and a control wheel. A vehicle body frame 1 having a tail wheel 1c, a small engine 2 mounted on the rear portion of the vehicle body frame 1, and a steering fork handle 3a (3b) extending rearward from a vertical frame 3 standing upright on the vehicle body frame 1. And a fertilizer spraying device 4 mounted on the front part of the vehicle body frame 1, and the driving force from the small engine 2 is via a V-belt (not shown) between the drive wheels 1a (1b). (See Figure 6)
And is branched from the transmission portion 5 to be transmitted to the horizontal drive drive axle 6 and the vertical drive drive axle 7. The engine speed is changed by operating the accelerator lever 7c, and the traveling speed of the fertilizer sprayer can be changed.

Further, as shown in FIG. 6, the fertilizer spraying device 4 is fixed to a spraying drive shaft 7 via a boss portion 7a and has a rotary spraying plate 9 having a plurality of spraying blades 9a, and a tank above this. A fertilizer tank (fertilizer hopper) 15 fixed on the mounting base plate 10, and a rod-like shape that is fixed by a tightening bolt (not shown) to the tip of the spray shaft 7 that penetrates the bottom plate 15a of the fertilizer tank 15 and horizontally rotates. The stirring arm 12, the one or more fertilizer dropping holes 15b formed in the bottom plate 15a of the fertilizer tank 15, and the fertilizer dropping holes 11a aligned with these fertilizer dropping holes 15b are provided. It is provided with a disk-shaped shutter plate 11 which is superposed on the back surface and is rotatable around the bearing 7b. The bottom plate 15a and the shutter plate 11 constitute a fertilizer drop adjusting plate mechanism.

The fertilizer tank 15 is rotated along with the rotation of the spray drive shaft 7.
Since the stirring arm 12 in the inside also swivels so as to crawl on the bottom plate 15a, the stored fertilizer (not shown) accumulated in the fertilizer tank 15 is continuously supplied to the fertilizer drop hole 15b of the bottom plate 15a without unevenness and is scratched. Since the fertilizer is dropped and continues to fall on the rotating spraying plate 9 through the fertilizer dropping hole 11a of the shutter plate 11, the centrifugal force of the spraying plate 9 causes the fertilizer to be spread in a predetermined fan-shaped spraying range (within the spraying angle) in the forward direction of travel. It is sprinkled continuously. When the shutter operating lever 7d is operated, the shutter 11 is rotated to move the fertilizer drop hole 11a and the bottom plate 15a.
Since the opening degree (hole overlapping degree) with the fertilizer dropping hole 15b can be adjusted, the dropping flow rate of the fertilizer falling from the fertilizer tank 15 onto the rotary spraying plate 9 can be adjusted, so that the fertilizer can be spread thickly.・ Thinning is possible. Further, the rotation speed of the spray drive shaft 7 can be varied by operating the accelerator lever 7c provided on the one handle 3a (3b), the centrifugal force of the rotary spray plate 9 can be increased or decreased, and the fertilizer flying distance can be increased. The length can be adjusted.

Incidentally, Japanese Patent Laid-Open No. 7-
As in the fertilizer drop adjusting plate mechanism of the fertilizer spraying device described in Japanese Patent No. 298741, a second shutter plate having a fertilizer dropping hole is provided below the shutter plate 11 so that the second shutter plate has a rotational position. It may be configured such that the spraying direction of fertilizer can be changed by adjusting. This fertilizer drop adjusting plate mechanism is capable of adjusting the spraying range and spraying direction of fertilizer by changing the dropping flow rate and the dropping position of fertilizer with two shutter plates.

[0006]

However, the above-mentioned fertilizer spreader has the following problems. That is, when a relatively dry fertilizer such as a chemical fertilizer is sprayed, the fertilizer remaining after being dropped on the spray plate 9 by the scraping of the stirring arm 12 that swirls on the bottom side in the funnel-shaped fertilizer tank 15. The stored fertilizer, which is relatively slippery or fluid (mobility), falls between the empty spaces and is replenished, so continuous spraying can be maintained, but organic fertilizer (compost) and other relatively moist Since the fertilizer, which has strong properties, remains sticky, it is difficult for the fertilizer to spontaneously collapse into the remaining space due to the scratching of the stirring arm 12, and only the swirl area of the stirring arm 12 in the stored fertilizer is hollow. The so-called bridging phenomenon in which the fertilizer is hardened and remains in a cross-linking state is apt to occur, and the continuous spraying is almost impossible due to the idle rotation of the stirring arm 12.

In such a case, it is conceivable to attach a stirring arm extending to the upper part of the tank 15 to the spraying drive shaft 7 to stir the upper part of the stored fertilizer as a whole, but the self-propelled fertilizer sprayer described above is used. Then, since the rotation speed of the spraying shaft 7 is relatively high in synchronization with the self-propelled speed, the load resistance (torque) received by the stirring arm becomes excessive, and the stirring arm is inevitably stiff, and the self-propelled fertilizer sprayer is applied. This will increase the weight and cost of the machine. In addition, since the fertilizer stored in the tank is more strongly kneaded by the aggressive stirring action, it becomes more agglomerated (coupling) together with the viscosity, and rather the fertilizer in the form of particles is less likely to fall from the fertilizer drop hole.

On the other hand, when adopting a structure in which the stirring arm 12 is rotated at a low speed, it is necessary to mount the stirring arm 12 via a reduction gear on a drive shaft of a system different from the spray drive shaft 7 for rotating the spray plate 9. Therefore, not only a new drive transmission system for the stirring arm 12 but also a gear box has to be fixed in the tank, resulting in cost increase.

In view of the above problems, the object of the present invention is to prevent the so-called bridging phenomenon even with relatively moist fertilizers, to maintain continuous spraying, and to significantly reduce the storage volume in the tank. The purpose of the present invention is to provide a fertilizer sprayer that does not need to be invited and that can realize cost reduction.

[0010]

In order to solve the above-mentioned problems, the present invention not only causes the stirring arm to swivel, but also superimposes a circular locus motion such as circular vibration of the stirring arm itself on this swirling motion. It is in the place where a means for vibrating and turning as a synthetic motion is taken.

That is, according to the present invention, a fertilizer tank for storing fertilizer having a fertilizer drop hole at the bottom and a power transmission system tank for transmitting a rotational driving force from the outside of the fertilizer tank into the tank. In a fertilizer spreader equipped with a fertilizer stirring means having a stirring arm for swirling the stored fertilizer in the fertilizer tank by an inner driven vertical axis, the fertilizer stirring means is a vertical driven shaft in the tank. Excitation-type power transmission means for transmitting to the stirring arm the power for converting the rotation into the swirling motion of the stirring arm with the vertical axis in the tank substantially as the swivel center and the circulation locus motion of the stirring arm itself. Is characterized by. Here, the circulation locus motion is a locus closed during one period motion (a linear locus, an elliptical locus, a circular locus, a rectangle, and the point belonging to the stirring arm that is a driven body starts from a certain point and returns to the starting point again. A locus or the like) and corresponds to a translational one-dimensional or three-dimensional vibration of each point belonging to the stirring arm.

In this structure, when the vertical driven shaft in the tank is driven to rotate, the stirring arm swirls due to the motion converting action of the excitation type power transmission means and simultaneously performs the circulating locus motion. Even if there is a vacancy in the stored fertilizer with static wetness, the stored fertilizer is oscillated by the small circular movement of the stirring arm, which can induce the collapse of the fertilizer around the vacancy and continuously stir the fertilizer. be able to. This excitation type power transmission means,
It does not excite by receiving power from a system different from the vertical driven shaft in the tank, nor is it a self-excited vibration means such as a vibration motor.
The vertical driven shaft in the tank and the agitating arm are converted based on the driven rotation of the vertical driven shaft in the tank into a vibrating swivel motion that is a combined motion of the swirling motion component of the stirring arm and the circulation locus motion component of the stirring arm itself. Since it can be provided between the above and the other members, and it is not necessary to dispose additional members, it is possible to realize simplification and compactness of the structure of the stirring means. Therefore, it is possible to provide a fertilizer sprayer that does not cause a significant reduction in the storage volume in the tank and can be manufactured at low cost.

The circulation locus motion may be linear vibration or elliptical vibration having a large stroke (amplitude range), but two-dimensional circular vibration or the like is required to cause the stored fertilizer to break down isotropically or multilaterally and to increase the falling frequency. It is desirable that the circulation locus has a wide vibration range. Of course, it is preferable that the circulation locus motion is a circular vibration having an amplitude shorter than the arm length of the stirring arm (distance between the center of rotation and the farthest point). The load resistance due to the vibration can be made lower than the load resistance due to the turning motion, and the vibration is hard to stop even in the overload state. In the case of circular vibration, it is also advantageous in simplifying the mechanism of the excitation type power transmission means itself.

This excitation type power transmission means does not always assign the uniform swinging motion component and vibration component of the power ratio to the stirring arm, but swirls according to the degree of load resistance received by the stirring arm by the stored fertilizer. It is suitable to use an automatic reverse transformation means that reduces the transmitted power to the motion and relatively increases the transmitted power to the circulation locus motion. The swirling motion of the stirring arm receives the load resistance of the stored fertilizer more strongly than the vibration of the stirring arm itself, but when the load torque is excessive, the swirling motion of the stirring arm itself stops and follows this. Vibration of the stirring arm is also restrained,
The stirring action itself disappears, and it becomes difficult to eliminate the overload condition. However, in the case where the excitation type power transmission means is a complementary automatic reverse transformation means of the swivel motion and the circulation locus motion as described above, when the load resistance that reduces the stroke of the swirl motion of the stirring arm by the stored fertilizer acts, On the contrary, since the vibrating force of the stirring arm becomes vigorous, even if the turning motion of the stirring arm is stopped, the vibration with less load resistance can continue, so that the vibration of the fertilizer can be induced. Due to the decline of the load state, a slight swing of the stirring arm is caused in turn, which induces further collapse, and the swing state of the stirring arm is restored sooner than the overloaded state. As described above, in the overload state, the vibration action is activated even if the swirling motion is reduced, and when the overload state is eliminated, the swirling motion is increased even though the vibration action is decreased. In addition, the fertilizer can be continuously stirred while changing slowly, and even fertilizer having a relatively wettability can be agitated and the fertilizer dropping can be continued without causing a bridge phenomenon.

As the automatic reverse changing means, an eccentric body which is eccentrically rotated with a predetermined eccentricity with respect to the longitudinal slave shaft in the tank,
Transmitting the power of the eccentric body to the planet body while allowing the planet body that easily rotates about the shaft center of the eccentric body to support the stirring arm and the relative escape resistance rotation of the planet body with respect to the eccentric body. And a joint having a joint. As a joint, a magnetic joint is suitable from the viewpoint of durability. When the vertical driven shaft in the tank rotates, the eccentric body rotates (revolves) with a predetermined amount of eccentricity. Although the eccentric body and the planetary body are coupled via a magnetic coupling, a slipping movement (step-out) with a relief resistance allows relative escape rotation (idling) between the two.

In principle, if there is no frictional force between the two, the weight of the planetary body and the stirring arm, and the load resistance received by the stirring arm, the planetary body will relatively escape and rotate even with a weak magnetic attraction force. Since the eccentric rotation (revolution) is synchronized with the eccentric body in synchronization with the eccentric body, the stirring arm performs a swivel motion with the driven shaft in the tank as the swivel center. The stirrer arm is subject to load resistance and air resistance from the stored fertilizer, and the planetary body is eccentric when the total load resistance on the planetary body exceeds the adsorption force of the magnetic coupling. Although it revolves with the revolution of the body, the planetary body gradually escapes and rotates,
Since the turning speed of the stirring arm becomes slower according to the escape amount, a locus length of circular vibration (vibration radius is an eccentric amount) commensurate with the escape amount is added to the stirring arm. Performs a vibrating swirl which is a synthetic motion in which a slow swirling motion and circular vibration are superimposed. Therefore, in the circular vibration of the stirring arm, the frequency of the circular vibration automatically increases / decreases according to the increase / decrease of the load resistance, and the circular vibration force increases / decreases.As the load resistance increases, the circular vibration becomes smaller and intermittent. The fertilizer can be pushed down smoothly without any. In the case of an overloaded state, a complete slip motion without dragging occurs in the magnetic coupling, so that the swirling motion of the stirring arm stops and the frequency of circular vibration becomes maximum. This maximum frequency is the orbital frequency of the planet.

Here, in order to support the excessive weight applied to the planetary body and reduce the unnecessary frictional force, it is preferable to interpose a bearing between the planetary body and the eccentric body. Ball bearings are good. The planet body may be arranged inside the bearing and the eccentric body may be arranged outside the bearing, and vice versa. Further, the sun gear axially attached to the vertical driven shaft in the tank and the planetary gear axially attached to the eccentric shaft may be meshed with each other to incorporate a speed change mechanism, but in order to realize the simplification and compactness of the configuration. Is preferably formed by integrally connecting the vertical driven shaft in the tank and the eccentric shaft with a fastening bolt or the like. In such a case, the eccentric body makes one revolution and one rotation.

The magnetic coupling may be provided on the inner and outer peripheral surfaces of the eccentric body and the planetary body, but in view of ease of manufacturing such as magnetization treatment,
It is preferably provided between the abutting surfaces of the eccentric body and the planetary body in the axial normal line. Of course, when it is provided on the peripheral surface, it is possible to make both the diameters smaller and to secure the magnetized area.

The magnetic coupling is formed by forming either one of the eccentric body and the planet body with a magnetic material, and is fixed on the other butting surface, and at the same time, a magnet plate is formed so as to be mated with one butting surface. Have. Since the eccentric body or the planetary body is used as the follower joint or follower joint of the magnetic coupling, it contributes to the reduction of the number of parts and the cost can be reduced.

As the magnet plate of the magnetic coupling, a magnet plate having a holed magnetic plate having a plurality of annularly drilled holes around its rotation center and a magnet embedded in the holes is adopted. In the case of a large-sized solid magnetic plate, the manufacturing cost of itself is high and the magnetic path protruding from the magnetic plate on the other side becomes long,
The adsorption power is weak. However, when a magnetic material with a hole that functions as a yoke plate is used, a protruding magnetic path is formed very close to the magnetic material between adjacent holes, so the length of the magnetic path is minimized and the attractive force is increased. The threshold torque can be increased. Also,
When the magnets embedded in the holes are positioned and set so that they slightly project from the surface of the magnetic plate with holes, and the test operation is performed, the surface of the projecting magnet inevitably wears out and becomes infinite. It is convenient because it forms a small gap.

The fertilizer sprayer described above may be a self-propelled fertilizer sprayer. In such a case, the vertical driven shaft in the tank is
Since the spreading shaft for rotating the spreading blades can be extended upward to the shaft end side that penetrates the bottom of the fertilizer tank, there is no need to install a separate shaft or drive transmission system, Cost can be reduced.

[0022]

BEST MODE FOR CARRYING OUT THE INVENTION Next, an embodiment of the present invention will be described with reference to the accompanying drawings. 1 is a left side view showing the overall appearance of a self-propelled manure spreader according to an embodiment of the present invention, FIG.
Is a vertical cross-sectional view showing a fertilizer stirring device in the self-propelled fertilizer sprayer, FIG. 3 is a sectional view taken along the line AA in FIG. 2, and FIG. It is a top view for explaining the motion form of a stirring arm.

The self-propelled fertilizer sprayer of this example also has a pair of left and right front wheels, which are drive wheels 1a (1b) and a control wheel, which is a tail wheel 1c.
1, a small engine 2 mounted on the rear portion of the body frame 1, a steering two-pronged handle 3a (3b) extending rearward from a vertical frame 3 standing on the body frame 1, and a body frame. 1 has a fertilizer spraying device 24 mounted on the front part thereof, and the driving force from the small engine 2 is transmitted to the transmission unit 5 between the drive wheels 1a (1b) via the V-belt 2a, and the transmission unit 5 It is adapted to be branched from and to be transmitted to a horizontal drive drive axle 6 and a vertical drive drive axle 7.
The engine speed is changed by operating an accelerator lever (not shown), so that the traveling speed of the fertilizer spreader can be changed.

Further, the fertilizer spraying device 24 includes the spray drive shaft 7
A rotary type spray plate 9 having a plurality of spray blades 9a fixed thereto via a boss portion 7a, and a fertilizer tank (fertilizer hopper) fixed on a tank mounting base plate (not shown) above the rotary spread plate 9.
25 and the fertilizer agitator 30 fixed to the tip of the spraying shaft 7 penetrating the bottom plate 25a of the fertilizer tank 25 with a tightening bolt 31, and one or more of the one or more formed on the bottom plate 25a of the fertilizer tank 25. The fertilizer dropping holes 25b and the fertilizer dropping holes 11a aligned with the fertilizer dropping holes 25b are provided, and the disc-shaped shutter plate 11 is superposed on the back surface of the bottom plate 25a of the fertilizer tank 25 and rotatable. Become.
The bottom plate 25a and the shutter plate 11 constitute a fertilizer drop adjusting plate mechanism.

Since the stirring arm 32 in the fertilizer tank 25 also rotates in synchronization with the rotation of the spray drive shaft 7, the fertilizer tank 2
The accumulated fertilizer (not shown) accumulated in 5 is continuously supplied to the fertilizer drop hole 25b of the bottom plate 25a without any deviation and is scraped off, and is rotated through the fertilizer drop hole 11a of the shutter plate 11. Since it continues to drop upwards, the fertilizer is sprinkled continuously in the predetermined fan-shaped spreading range (within the spreading angle) in the forward direction by the centrifugal force of the spreading plate 9.

The fertilizer agitator 30 of this example is an iron eccentric shaft 33 that eccentrically rotates with respect to the spray shaft 7 in the tank 25 by an eccentric amount d, and the eccentric shaft 33 is easily rotated about its axis. In addition, the power of the eccentric shaft 33 is supplied to the planetary wheel 34, which is made of iron and supports the stirring arm 32 with bolts 32a, and the relative escape resistance rotation of the planetary wheel 34 with respect to the eccentric shaft 33. A magnetic coupling 35 for transmission to
It has a ball bearing 36 interposed between the planet wheel 34 and the eccentric shaft 33.

The eccentric shaft 33 has a substantially cylindrical shape and has a shaft hole 33a for inserting the dispersion shaft 7 at a position offset from the center by an eccentric amount d and a shaft hole 33a on the peripheral side surface for screwing the tightening bolt 31. It has a horizontal screw hole 33b for insertion and a reduced diameter projection 33c at the center of the upper part.

The planet wheel 34 has an inverted, generally bottomed cylindrical shape, and a ball bearing 36 is interposed between the eccentric shaft 33 inserted in the cylinder and the cylindrical wall 34a. This ball bearing 36
Consists of an outer ring 36a fitted to the cylindrical wall 34a, an inner ring 36b fitted to the eccentric shaft 33, and a plurality of steel balls 36c sandwiched between the two rings. The ball bearing 36 is retained by a retaining ring 37. The eccentric shaft 33 is also prevented from coming off by a retaining ring 38.

The magnetic coupling 35 includes a reduced-diameter projection 33c of the eccentric shaft 33, a magnet plate 35a on the driving side fixed to the stepped portion by welding or the like, and a planetary wheel of a driven node which is joined to the magnet plate 35a by an infinitesimal clearance. And a bottom surface 35b of 34. Magnet plate 35a
Has an iron annular bottom plate 35aa having fitting holes that fit into the reduced-diameter projections 33c and a fitting hole that fits into the reduced-diameter projections 33c with a gap. A magnetic plate 35ab with a hole in which the disk-shaped magnet M is embedded is fixed by welding or the like.

When the dispersion shaft 7 rotates, the eccentric shaft 33 rotates eccentrically (revolves) with an eccentric amount d. Although the eccentric shaft 33 and the planet wheel 34 are coupled via the magnetic coupling 35, they are the magnetic coupling 35, and therefore slip motion (step out)
By this, relative escape resistance rotation (idling) is possible between the two.

In principle, the frictional force between the two and the planet wheel 34
If the weight of the stirring arm 32 and the load resistance received by the stirring arm 32 are zero, the planetary wheel 34 is synchronized with the eccentric shaft 33 integrally without causing a relative escape rotation even with a weak attracting force of the magnetic coupling 35. Since the eccentric rotation (1 revolution 1 rotation) is performed, the stirring arm 32 performs a revolving motion with the sprinkling shaft 7 as a substantially revolving center so that the solid line locus of the point A of the stirring arm 32 in FIG. It is a thing. But in reality,
Since the frictional force and the own weight of the planet wheels 34 and the stirring arm 32 exist, the stirring arms 32 receive load resistance and air resistance from the stored fertilizer. Therefore, the total load resistance applied to the planet wheels 34 is the magnetic coupling 35. When the planetary wheel 34 revolves along with the revolution with the eccentric shaft 33, the planetary wheel 34 gradually escapes and rotates, so that the stirring arm 32 moves according to the escape amount. min the turning speed is reduced, only the circular vibrations of commensurate around amount relief (vibration radius eccentricity d) will be locus length of is added to the stirring arm 32, as indicated by a broken line path in FIG. 4, stirred arm
32 eccentrically rotates with respect to the distribution shaft 7 in the tank 25 by an eccentric amount d.

In the overloaded state, the magnetic coupling 35 undergoes a complete slip motion without dragging, so that the swirling motion of the stirring arm 32 is stopped and the frequency of circular vibration is maximized. This maximum frequency is the revolution frequency of the planet wheels 34.

The fertilizer stirring device 30 does not excite by receiving power from a system different from that of the spraying shaft 7, nor is it a self-excited vibrating means such as a vibration motor, and the stirring arm is based on the driven rotation of the spraying shaft 7. Since the swirling motion component of 32 and the circulation locus motion component of the stirring arm 32 itself are converted into a vibrating swirling motion, which can be provided between the spraying shaft 7 and the stirring arm 32, and in addition to that, Since it is not necessary to arrange members, the structure of the stirring device 30 can be simplified and made compact. Therefore, it is possible to provide a fertilizer sprayer that does not cause a significant decrease in the storage volume in the tank 25 and can be manufactured at low cost.

Since the magnetic coupling 35 uses the planetary wheel 34 itself made of a magnetic material as a driven node, it contributes to the reduction of the number of parts and the cost can be reduced. Further, in the magnetic coupling 35, since the magnet M is embedded in the hole of the magnetic plate with holes 35ab, the magnetic path between the adjacent holes is formed to be close to the magnetic material. Can be shortened, the suction force can be enhanced, and the threshold torque can be increased. Further, when the magnet M embedded in the hole is positioned and set so as to slightly project from the surface of the magnetic plate with holes 35ab and the test operation is performed, the surface of the projecting magnet M is inevitably abraded and flattened. This is convenient because it forms an infinitesimal gap with the bottom surface 35b of the planet wheel 34.

[0035]

As described above, in the fertilizer sprayer according to the present invention, not only the stirring arm is swung, but also the swirling motion is combined with the circular locus motion such as circular vibration of the stirring arm itself. Excitation-type power transmission means for performing vibrating and swinging motion is provided .
Eccentric rotation with a predetermined eccentricity with respect to the vertical driven shaft in the link
Eccentric body and its rotation centering on the axis of this eccentric body
The planetary body that supports the stirring arm and the eccentric body
Relative escape resistance of rotating planets
And a magnetic coupling for transmitting the power of the core to the planet
Since it is characterized by being formed, it has the following effects.

The circular vibration of the stirring arm is due to the increase / decrease in load resistance.
The vibration frequency automatically increases or decreases according to
Therefore, the fertilizer can be pushed down smoothly without interruption.
It In the case of overload, there is no drag on the magnetic coupling.
The swirling motion of the stirring arm is caused by the complete slip motion.
Stops, and the frequency of circular vibration becomes maximum. Also magnetic coupling
Therefore, it is appropriate in terms of durability .

[0037]

[0038]

[0039]

[0040]

[0041]

[Brief description of drawings]

FIG. 1 is a left side view showing an overall appearance of a self-propelled manure spreader according to an embodiment of the present invention.

FIG. 2 is a vertical sectional view showing a fertilizer stirring device in the self-propelled fertilizer sprayer.

FIG. 3 is a sectional view taken along line AA in FIG.

FIG. 4 is a plan view for explaining a motion form of a stirring arm in the fertilizer stirring device.

FIG. 5 is a left side view showing the overall appearance of a conventional self-propelled manure spreader.

FIG. 6 is a vertical sectional view showing a fertilizer spraying device in a conventional self-propelled fertilizer sprayer.

[Explanation of symbols]

1 ... Body frame 1a, 1b ... Drive wheels 1c ... tail wheel 2 ... Small engine 2a ... V belt 3 ... Vertical frame 3a, 3b ... Bifurcated handle for control 5 ... Transmission department 6 ... Truck drive axle 7 ... Vertical drive shaft 7a ... Boss part 9a ... Scattering blade 9 ... Rotary spreading plate 11 ... Disc-shaped shutter plate 11a, 25b ... Fertilizer drop hole 24 ... Fertilizer spraying device 25 ... Fertilizer tank (fertilizer hopper) 25a ... bottom plate 30 ... Fertilizer stirring device 31 ... Tightening bolt 32 ... Stirring arm 32a ... bolt 33 ... Eccentric shaft 33a ... Shaft hole 33b ... Horizontal screw hole 33c ... Reducing projection 34 ... Planetary wheel 34a ... Cylinder wall 35 ... Magnetic coupling 35a ... Magnet plate 35aa ... annular bottom plate 35ab ... Magnetic plate with holes 35b ... bottom surface 36 ... Ball bearing 36a ... outer ring 36b ... Inner ring 36c ... steel ball 37, 38 ... Retaining ring d ... Eccentricity

Claims (6)

(57) [Claims] 1. A fertilizer tank for storing fertilizer having a fertilizer drop hole at the bottom, and a vertical driven shaft in the tank of a power transmission system for transmitting a rotational driving force from the outside of the fertilizer tank into the tank. In the fertilizer spreader equipped with a fertilizer stirring means having a stirring arm for swirling in the fertilizer tank to stir the stored fertilizer, the fertilizer stirring means rotates the vertical driven shaft in the tank,
Possess the excitation power transmission means for transmitting power to each convert vertical driven shaft within the tank pivotal movement of the agitating arm substantially turning center and the circulation path movement of the stirring arm itself to the stirring arm, the The excitation type power transmission means is
Eccentric rotation with a predetermined eccentricity with respect to the vertical driven shaft in the link
Eccentric body and its rotation centering on the axis of this eccentric body
And a planetary body that supports the stirring arm and is easily
Allows relative escape resistance rotation of the planetary body to the core
While transmitting the power of the eccentric body to the planet body
A fertilizer spreader comprising a force joint . 2. The fertilizer sprayer according to claim 1 , further comprising a bearing interposed between the planet body and the eccentric body. 3. The claim 1 or claim 2, manure spreaders, characterized in that formed by integrally connecting the said eccentric body and the tank longitudinal driven shaft. 4. A any one of claims 1 to 3, wherein the magnetic joint, characterized in that provided between the abutting surfaces of axial normal of said eccentric member and said planet And fertilizer spreader. 5. The magnetic coupling according to claim 4 , wherein any one of the eccentric body and the planet body is formed of a magnetic material, and the magnetic coupling is fixed on the other butting surface and A fertilizer sprayer having a magnet plate formed in combination with the abutting surface. 6. The magnetic plate according to claim 5 , wherein the magnet plate has a magnetic plate with holes having a plurality of holes that are annularly and discretely formed around the rotation center, and a magnet embedded in the holes. A fertilizer spreader characterized by being made.