JP3586439B2 - Manure spreader - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a fertilizer spreader provided with fertilizer stirring means for stirring fertilizer in a tank.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, a self-propelled fertilizer spreader that sprinkles fertilizer by centrifugal force while self-propelled includes, for example, a drive wheel 1a (1b) as a pair of left and right front wheels and a tail wheel 1c as a control wheel as shown in FIG. A vehicle body frame 1, a small engine 2 mounted on a rear portion of the vehicle body frame 1, a steering forked handle 3 a (3 b) extending rearward from a vertical frame 3 standing on the vehicle body frame 1, and a vehicle body frame 1. And a transmission unit 5 (see FIG. 7) between the drive wheels 1a (1b) via a V-belt (not shown) through a V-belt (not shown). From the transmission section 5 to the traveling drive axle 6 on the horizontal axis and the dispersion drive shaft 7 on the vertical axis. The operation of the accelerator lever 7c changes the engine speed, so that the running speed of the fertilizer spreader can be varied.
[0003]
As shown in FIG. 7, the fertilizer spray device 4 is fixed to the spray drive shaft 7 via a boss 7a, and has a rotary spray plate 9 having a plurality of spray blades 9a and a tank mounting base plate above the rotary spray plate 9. A fertilizer tank (fertilizer hopper) 15 fixed on the top 10 and a rod-shaped stirring arm 12 which is fixed to a tip end of the spraying shaft 7 penetrating the bottom plate 15a of the fertilizer tank 15 with a fastening bolt (not shown) and rotates horizontally. And one or more fertilizer pits 15b formed in the bottom plate 15a of the fertilizer tank 15, and a fertilizer pit 11a aligned with these fertilizer pits 15b. And a disk-shaped shutter plate 11 that is rotatable around the bearing 7b. The bottom plate 15a and the shutter plate 11 constitute a fertilizer drop adjusting plate mechanism.
[0004]
Since the agitating arm 12 in the fertilizer tank 15 also turns so as to crawl on the bottom plate 15a with the rotation of the spray drive shaft 7, the stored fertilizer (not shown) accumulated in the fertilizer tank 15 is continuously distributed without unevenness in the bottom plate 15a. Is supplied to the fertilizer drop hole 15b and is scraped off, and continues to fall on the rotating spray plate 9 through the fertilizer drop hole 11a of the shutter plate 11, so that the centrifugal force of the spray plate 9 causes a fan-shaped predetermined fan in the forward direction. Fertilizer is continuously scattered over the area to be scattered (within the scatter angle). When the shutter operation lever 7d is operated, the shutter 11 rotates and the opening degree (degree of hole overlap) between the fertilizer drop hole 11a and the fertilizer drop hole 15b of the bottom plate 15a can be squeezed and adjusted. Since the flow rate of fertilizer falling from onto the rotary spray plate 9 can be adjusted, thick and thin fertilizer can be spread.
[0005]
It should be noted that a second shutter plate having a fertilizer dropping hole below the shutter plate 11 is overlapped like the fertilizer drop adjusting plate mechanism of the fertilizer spraying device described in Japanese Patent Application Laid-Open No. 7-2988741, which has already been disclosed by the present applicant. The fertilizer application direction may be changed by adjusting the rotation position of the second shutter plate. This fertilizer drop adjusting plate mechanism is capable of adjusting the range and direction of fertilizer application by changing the flow rate and the drop position of the fertilizer using two shutter plates.
[0006]
However, when a relatively dry fertilizer such as a chemical fertilizer or a granular or granular fertilizer is sprayed, the spray plate 9 is swept by the stirring arm 12 swiveling on the bottom side in the funnel-shaped fertilizer tank 15. Since fertilizer that has relatively slipperiness or fluidity (mobility) collapses and continues to be replenished successively between empty fertilizers that have been dropped into the fertilizer, continuous application of fertilizer must be continued without interruption. Fertilizers that can be maintained, but are relatively wet, such as organic fertilizers (compost), remain sticky, and it is difficult for the stirring arm 12 to scrape the fertilizer into the remaining empty space autonomously. Of the stored fertilizers, only the swirling area of the stirring arm 12 is hollowed out, and the so-called bridge phenomenon that the fertilizer solidifies and remains in a cross-linking state easily occurs. It can become.
[0007]
In order to remedy such inconvenience, a method may be considered in which a stirring arm extended to the upper part of the tank 15 is attached to the spray drive shaft 7 to stir even the upper part of the stored fertilizer as a whole. 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 must be made robust. This leads to an increase in the weight and cost of the spreader. In addition, since the fertilizer stored in the tank is more strongly kneaded due to the vigorous stirring action, the fertilizer is more likely to be agglomerated and coagulated (connected), and it is rather difficult for the granular fertilizer to drop from the fertilizer drop hole.
[0008]
On the other hand, when adopting a configuration in which the stirring arm 12 is rotated at a low speed, it is necessary to attach the stirring arm 12 to the drive shaft of a different system from the spray drive shaft 7 for rotating the spray plate 9 via a speed reducer. Therefore, not only a new drive transmission system for the stirring arm 12 but also a gear box or the like must be fixed in the tank, which causes a substantial reduction in the storage volume and an increase in cost.
[0009]
In order to solve such a problem, the present applicant can suppress so-called bridging phenomenon even with a relatively wet fertilizer so that continuous spraying can be sustained, and the storage volume in the tank does not significantly decrease. A self-propelled fertilizer spreader capable of realizing a low cost is disclosed in Japanese Patent Application No. 11-363295.
[0010]
As shown in FIG. 8, the self-propelled fertilizer spreader has a body frame 1 having a pair of left and right front wheels, ie, a drive wheel 1a (1b) and a control wheel, a tail wheel 1c, and a rear portion of the body frame 1. A small engine 2 mounted on the vehicle body, a steering bifurcation handle 3a (3b) extending rearward from the vertical frame 3 standing on the vehicle body frame 1, and a fertilizer spraying device 24 mounted on the front part of the vehicle body frame 1. The motive power from the small engine 2 is transmitted to the transmission unit 5 between the driving wheels 1a (1b) via the V-belt 2a, branched from the transmission unit 5 and traveled on the horizontal axis and the axle 6 on the vertical axis. The power is transmitted to the spray drive shaft 7. By operating an accelerator lever (not shown), the engine speed changes, and the running speed of the fertilizer spreader can be varied. The fertilizer application device 24 is fixed to the application drive shaft 7 via a boss 7a, and is fixed on a rotary application plate 9 having a plurality of application blades 9a and a tank mounting base plate (not shown) above this. The fertilizer tank (fertilizer hopper) 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 fastening bolt 31 and the bottom plate 25a of the fertilizer tank 25 It has one or more fertilizer pits 25b and fertilizer pits 11a aligned with these fertilizer pits 25b, and is a disc-shaped rotatable superimposed on the back surface of the bottom plate 25a of the fertilizer tank 25. And a shutter plate 11. 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 stored fertilizer (not shown) accumulated in the fertilizer tank 25 is continuously removed without unevenness in the fertilizer drop hole of the bottom plate 25a. 25b, and is continuously dropped on the rotating spraying plate 9 through the fertilizer dropping hole 11a of the shutter plate 11, so that the centrifugal force of the spraying plate 9 causes a fan-shaped predetermined spraying range (spraying). Fertilizer is continuously scattered around the corner.
[0011]
As shown in FIGS. 9 and 10, the fertilizer stirring device 30 includes an iron eccentric shaft 33 that rotates eccentrically with respect to the scatter shaft 7 in the tank 25 by an eccentric amount d, and an axis of the eccentric shaft 33 as a rotation center. The iron planetary wheel 34, which easily rotates and supports the stirring arm 32 with bolts 32a, and the power of the eccentric shaft 33 while allowing the planet wheel 34 to escape relative to the eccentric shaft 33 while resisting rotation. It has a magnetic coupling 35 for transmitting to the planetary wheel 34 and a ball bearing 36 interposed between the planetary wheel 34 and the eccentric shaft 33. The eccentric shaft 33 is substantially cylindrical and has a shaft hole 33a for inserting the spraying shaft 7 at a position offset by an eccentric amount d from the center, and a shaft hole 33a on the circumferential side surface for screwing the tightening bolt 31. And a reduced diameter projection 33c at the upper center. The planetary wheel 34 has an inverted, substantially bottomed cylindrical shape, and a ball bearing 36 is interposed between the eccentric shaft 33 inserted into the cylinder and the cylindrical wall 34a. The ball bearing 36 includes an outer ring 36a fitted on the cylindrical wall 34a, an inner ring 36b fitted on the eccentric shaft 33, and a plurality of steel balls 36c sandwiched between the two wheels. The ball bearing 36 is retained by a retaining ring 37. The eccentric shaft 33 is also prevented from falling off by a retaining ring 38. The magnetic coupling 35 has a reduced-diameter projection 33c of the eccentric shaft 33, a driving-side magnet plate 35a fixed to the step portion by welding or the like, and a bottom surface of the planetary wheel 34 of the driven node which is fitted with an infinitesimal clearance. 35b. The magnet plate 35a has an iron annular bottom plate 35aa having a fitting hole that fits into the reduced diameter projection 33c, and a fitting hole that fits with a gap in the reduced diameter projection 33c. A magnetic plate 35ab with a hole in which a small disc-shaped magnet M is embedded in the hole is fixed by welding or the like.
[0012]
When the dispersion shaft 7 rotates, the eccentric shaft 33 rotates eccentrically (revolves) with the amount of eccentricity d. Although the eccentric shaft 33 and the planetary wheel 34 are coupled via the magnetic coupling 35, since the coupling is the magnetic coupling 35, the slip motion (step-out) causes relative escape between the two due to slipping (out-of-rotation). Is possible. In principle, when there is no frictional force between the two, the own weight of the planetary wheel 34 and the stirring arm 32, and no load resistance received by the stirring arm 32, the planetary wheel 34 is relatively movable even if the magnetic attraction force of the magnetic coupling 35 is weak. Since the eccentric shaft 33 performs eccentric rotation (one revolution and one rotation) integrally and synchronously with the eccentric shaft 33 without causing escape rotation, the stirring arm 32 has a solid line locus at a point A of the stirring arm 32 in FIG. Performs a swiveling motion about the spraying shaft 7 as a substantially swiveling center. However, in reality, the frictional force and the weight of the planetary wheel 34 and the stirring arm 32 exist, and the stirring arm 32 receives load resistance and air resistance from the stored fertilizer. When the load resistance exceeds the attraction force of the magnetic coupling 35, the planetary wheel 34 revolves along with the revolving with the eccentric shaft 33, but the planetary wheel 34 gradually retreats and rotates. For this reason, the trajectory length of the circular vibration (oscillation radius is the eccentricity d) is added to the stirring arm 32 by the amount corresponding to the amount of escaping, because the turning speed of the stirring arm 32 is slowed down. As shown by, the stirring arm 32 rotates eccentrically with respect to the spraying shaft 7 in the tank 25 by an eccentric amount d. In the case of an overload state, a complete slip motion without drag occurs in the magnetic coupling 35, so that the swirling motion of the stirring arm 32 is stopped, and the frequency of the circular vibration is maximized. This maximum frequency is the revolution frequency of the planetary wheel 34.
[0013]
Therefore, even if a gap occurs in the stored fertilizer that is relatively wet due to the stirring by the swirling motion of the stirring arm 32, the stored fertilizer is vibrated by the small circular vibration of the stirring arm 32, and the fertilizer around the gap is removed. Collapse can be induced and the fertilizer can be stirred continuously. The fertilizer stirring device 30 does not receive and excite the power of a separate system from the spraying shaft 7, is not a self-excited vibration means such as a vibration motor, etc., and rotates the stirring arm 32 based on the driven rotation of the spraying shaft 7. Since the motion is converted into a vibrating swirling motion, which is a synthetic motion of the motion component and the circulating trajectory motion component of the stirring arm 32 itself, it can be provided between the spraying shaft 7 and the stirring arm 32, and additional members are arranged. Since there is no need to perform the above, the configuration of the stirring device 30 can be simplified and downsized.
[0014]
[Problems to be solved by the invention]
However, the fertilizer spraying apparatus using the magnetic coupling has the following problems. That is, when the load resistance gradually increases, the agitating arm 32 does not gradually increase the circular vibration while accompanying the circular vibration with the turning motion, but once the slip occurs in the magnetic coupling due to the generation of the threshold load resistance, Only the circular vibration continues and the stirring action does not work. If a slip occurs in the magnetic coupling, the planetary wheel has inertia contrary to the decrease in frictional force due to kinetic friction force, so it keeps slipping out of the magnetic attraction force, causing slippage (step-out). Is narrow. For this reason, although circular vibrations are generated, they do not involve a swirling motion, so that the scraping action temporarily decreases, making it difficult to perform smooth continuous spraying.
[0015]
When the magnetic force of the magnetic coupling is increased, it is possible to quickly return from circular vibration to turning motion when the load resistance decreases, but it is still difficult to obtain turning motion accompanied by circular vibration, and the threshold load resistance , The generation of the circular vibration is delayed. For this reason, smooth continuous spraying also becomes difficult.
[0016]
Therefore, the present invention realizes a magnetic coupling that converts a stirring arm into a swirling motion accompanied by a circular vibration, so that the so-called bridge phenomenon can be suppressed even with a relatively wet fertilizer, and continuous spraying can be continued. Another object of the present invention is to provide a fertilizer spreader that does not cause a large decrease in the storage volume in a tank and can realize low cost.
[0017]
[Means for Solving the Problems]
In order to solve the above problems, the present invention provides a fertilizer tank for storing a fertilizer, having a fertilizer dropping hole at the bottom, and a longitudinally driven tank in a tank for transmitting a rotational driving force from outside the fertilizer tank into the tank. A fertilizer stirring means having a stirring arm for rotating the fertilizer tank in the fertilizer tank and stirring the stored fertilizer, wherein the fertilizer stirring means rotates eccentrically with a predetermined eccentric amount with respect to the vertical driven shaft in the tank. An eccentric body, a planetary body which is easy to rotate around the axis of the eccentric body and supports the stirring arm, and a planetary body interposed between the eccentric body and the opposing surface of the planetary body, and A fertilizer dispersing device having a magnetic coupling for transmitting the power of the eccentric body to the planetary body while allowing the resistive rotation, and wherein the magnetic coupling comprises: a first magnet plate fixed to the eccentric body side; A planetary body that overlaps the 1 magnet plate A magnetic plate with holes having a plurality of holes drilled discretely around the center of rotation, and a magnet embedded in the holes. It is characterized by comprising.
[0018]
In such a configuration, when the load resistance applied to the stirring arm is within the magnetic force threshold of the magnetic joint, the second magnet plate is integrally fixed to the first magnet plate. Performs a swirling motion about the axis of rotation, agitates and scrapes the fertilizer, but when the load resistance exceeds the magnetic force threshold of the magnetic joint, the second magnet plate slips with respect to the first magnet plate, As the turning motion of the stirring arm about the turning center of the vertical driven shaft in the tank is weakened, the stirring arm generates circular vibration about the axis of the eccentric body as the center of rotation. Here, for example, in the case where the magnetic coupling has a configuration in which the magnets of the first magnet plate and the magnets of the second magnet plate face each other with the same magnetic pole, in the no-slip state, the first magnet plate is magnetized by magnetic repulsion. The magnet and the magnet of the second magnet plate are magnetically coupled at a magnetic force stable point where the magnet is at a staggered position, but the magnet of the second magnet plate slips relative to the magnet of the first magnet plate. Then, since the same poles gradually come close to each other and oppose each other, the repulsive magnetic force in the direction of pulling back the slip rotation is strengthened, and the slip rotation is difficult. When the load resistance is strong against the repulsive magnetic force, the second magnetic plate performs slip rotation, and when it exceeds the maximum retraction point, the second magnetic plate is stabilized at the next staggered position. For this reason, the slip resistance has a wave-like characteristic in which the magnetic force stable point at the position where the magnet is staggered and the maximum repulsion point at the position closest to the magnet are alternately repeated, so that the circular vibration itself is stepped or stepped within one cycle. Will occur. In particular, the rotation of the first magnetic plate is strongly prevented by the repulsion of the repulsive magnetic force. Therefore, if the load resistance is reduced even after the first slip, the circular vibration stops and the circular vibration does not continue as it is. For this reason, although the rotation speed of the stirring arm is reduced, it is not interrupted immediately, and therefore, continuous spraying can be maintained. In addition, during the period in which the rotation speed of the stirring arm is slow, not only a simple constant-speed circular vibration but also an articulated or step-by-step acceleration / deceleration circular vibration occurs. Since the movement occurs, the crushing action on the fertilizer is enhanced, which is effective in suppressing the so-called bridge phenomenon.
[0019]
When the magnets of the first magnet plate and the magnets of the second magnet plate face each other with different magnetic poles, the magnets overlap each other in the non-slip state, which corresponds to the maximum magnetic attraction point, and the pull-back force of the detent. Is a magnetic attraction force that gradually decreases in accordance with the slip rotation amount, so that the anti-rotation effect is lower than in a configuration in which the magnetic poles are opposed to each other. However, since the circular vibration is generated in a stepwise or stepwise manner within one cycle, continuous spraying can be maintained.
[0020]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, an embodiment of a fertilizer application device according to the present invention will be described with reference to the accompanying drawings. 1 (a) is a plan view showing a fertilizer stirring device used in the fertilizer spraying device according to the present invention, FIG. 1 (b) is a longitudinal sectional front view thereof, and FIG. 2 is an exploded longitudinal sectional view showing the fertilizer stirring device. . In FIG. 1, the same portions as those shown in FIG. 9 are denoted by the same reference numerals, and description thereof will be omitted.
[0021]
The self-propelled fertilizer spreader of this example also has the same configuration as the self-propelled fertilizer spreader of Japanese Patent Application No. 11-363295 described above, but differs in the configuration of the magnetic coupling 60 of the fertilizer stirring device 50. I have to.
[0022]
The magnetic coupling 60 has a back yoke disk 61 fitted and fixed to the reduced diameter projection 33c of the eccentric shaft 33, and a circular first yoke fixed to the back yoke disk 61 fitted to the reduced diameter projection 33c of the eccentric shaft 33. And a circular second magnet plate 63 which is overlapped with the first magnet plate 62, loosely fits on the reduced diameter projection 33c, and is fixed to the planetary wheel 34. Each of the first and second magnet plates 62 and 63 has six circular holes which are annularly and discretely formed at regular intervals around the center of rotation, and magnet disks M1 and M2 are embedded and fixed in these circular holes. ing. In this example, as shown in FIG. 2, the magnet disk M1 of the first magnet plate 62 and the magnet disk M2 of the second magnet plate 63 are arranged to face each other such that the magnetic poles are the same. Reference numeral 51 denotes a dust cover.
[0023]
In the magnetic coupling 60, since the magnet disk M1 of the first magnet plate 62 and the magnet disk M2 of the second magnet plate 63 face each other with the same magnetic pole, in the non-slip state, as shown in FIG. As shown in (a-2), the magnet disk M1 of the first magnet plate 62 and the magnet disk M2 of the second magnet plate 63 are magnetically coupled at a magnetic force stable point which is a staggered position in a plan view due to magnetic repulsion. Since the second magnet plate 63 rotates in the same direction as the first magnet plate 6 at the same speed, the stirring arm 32 performs only a turning motion.
[0024]
As shown in FIGS. 3 (b-1) and 3 (b-2), when the second magnet plate 63 slips relative to the first magnet plate 62, the same poles gradually approach each other. Therefore, the repulsive magnetic force in the direction of pulling back the slip rotation is strengthened, and the slip rotation is difficult. For this reason, the second magnet plate 63 rotates in the same direction as the first magnet plate 6, but its rotation speed is slightly slower.
[0025]
Next, as shown in FIGS. 3 (c-1) and 3 (c-2), when the load resistance is strong against the repulsive magnetic force, the second magnetic plate 63 slip-rotates and exceeds the maximum pull-back point. Stabilizes at the next staggered position. In this transition process, since the staggered position is shifted by one pitch, the tuning rotational speed of the second magnetic plate 63 is reduced to the maximum. For this reason, the slip resistance has a wave-like characteristic in which the magnetic force stable point at the position where the magnet is staggered and the maximum repulsion point at the position closest to the magnet are alternately repeated, so that the circular vibration itself is stepped or stepped within one cycle. Will occur. In particular, since the rotation of the first magnetic plate 62 is strongly stopped by the repulsion of the repulsive magnetic force, the circular vibration stops and the circular vibration does not continue as it is if the load resistance becomes light even after the first slip. For this reason, although the rotation speed of the stirring arm 32 is reduced, it is not immediately interrupted, and therefore, continuous spraying can be continued. In addition, during a period in which the turning speed of the stirring arm 32 is slow, not only a simple constant-speed circular vibration but also an articulated or step-by-step acceleration / deceleration circular vibration is generated, so that the shock cycle shorter than the cycle of the circular vibration is generated. Since the actuation occurs, the crushing action on the fertilizer is enhanced, which is effective in suppressing the so-called bridge phenomenon.
[0026]
FIG. 4 is an exploded longitudinal front view showing another fertilizer stirring device used in the fertilizer spraying device according to the present invention. The magnetic joint in the fertilizer agitator of this example is, similarly to the above, a back yoke disc 61 fitted and fixed to the reduced diameter projection 33c of the eccentric shaft 33, and a back yoke fitted to the reduced diameter projection 33c of the eccentric shaft 33. A circular first magnet plate 62 fixed to a circular plate 61, and a circular second magnet plate fixed to the planetary wheel 34 by overlapping with the first magnetic plate 62 and loosely fitting to the reduced diameter projection 33 c; 63, and the first and second magnet plates 62, 63 have six circular holes formed annularly and discretely at equal intervals around the center of rotation, and these circular holes have magnet disks M1, Although M2 is embedded and fixed, the magnet disk M1 of the first magnet plate 62 and the magnet disk M2 of the second magnet plate 63 are arranged to face each other such that the magnetic poles are different magnetic poles.
[0027]
Therefore, as shown in FIGS. 5A-1 and 5A-2, the magnet disk M1 of the first magnet plate 62 and the magnet disk M2 of the second magnet plate 63 are in an overlapping state in a non-slip state. Yes, corresponding to the maximum magnetic attraction point. When the load resistance is increased, the pull-back force of the detent is a magnetic attraction force that gradually decreases in accordance with the slip rotation amount. Therefore, the detent effect is lower than that of the configuration in which the magnetic poles are opposed to each other, and FIG. ) And (b-2), the state is changed to the state shown in FIGS. 5 (c-1) and (c-2). Even with such a magnetic coupling, the circular vibration is generated in a stepwise or stepwise manner within one cycle, so that continuous dispersion can be maintained.
[0028]
【The invention's effect】
As described above, the fertilizer spreader according to the present invention is characterized by using a magnetic coupling having improved resistance to escape using a repulsive magnetic force of an opposed magnet or a detent effect by an attractive magnetic force. Even if the load resistance becomes strong, the stirring arm generates circular vibration in a step or step manner, so that the swirling motion is not interrupted, and the so-called bridging phenomenon can be suppressed even with relatively wet fertilizer, and continuous spraying is performed. Is sustainable. Further, since circular vibration can be obtained by using the magnetic coupling, the storage volume in the tank does not significantly decrease, and the cost can be reduced. In particular, in the case of a magnetic joint having a configuration in which the first magnet and the second magnet are opposed to each other with the same polarity, the escape resistance is significantly improved, and shocking excitation is generated within one circular vibration cycle. And the crushing action on wet fertilizer is increased.
[Brief description of the drawings]
FIG. 1A is a plan view showing a fertilizer stirring device used in a fertilizer spraying device according to the present invention, and FIG. 1B is a longitudinal sectional front view thereof.
FIG. 2 is an exploded longitudinal sectional view of the fertilizer stirring device.
FIG. 3 is a view for explaining relative movement of first and second magnet plates of a magnetic coupling in the fertilizer stirring device, (a-1) is a plan view of the magnet plate, and (a-2) is ( a-1) is a cross-sectional view showing a state cut along the line AA in (a-1), (b-1) is a plan view of the magnet plate, and (b-2) is along the line BB in (b-1). FIG. 3C is a cross-sectional view showing a state cut along a line, (c-1) is a plan view of a magnet plate, and (c-2) is a cross-sectional view showing a state cut along a line CC in (c-1).
FIG. 4 is an exploded longitudinal front view showing another fertilizer stirring device used in the fertilizer spraying device according to the present invention.
FIG. 5 is a view for explaining the relative movement of the first and second magnet plates of the magnetic coupling in the fertilizer stirring device, (a-1) is a plan view of the magnet plate, and (a-2) is ( a-1) is a cross-sectional view showing a state cut along the line AA in (a-1), (b-1) is a plan view of the magnet plate, and (b-2) is along the line BB in (b-1). FIG. 3C is a cross-sectional view showing a state cut along a line, (c-1) is a plan view of a magnet plate, and (c-2) is a cross-sectional view showing a state cut along a line CC in (c-1).
FIG. 6 is a left side view showing the overall appearance of a conventional self-propelled manure spreader.
FIG. 7 is a longitudinal sectional view showing a fertilizer application device in a conventional self-propelled fertilizer application device.
FIG. 8 is a left side view showing the overall appearance of the self-propelled fertilizer spreader before the improvement of the present invention.
FIG. 9 is a longitudinal sectional view showing a fertilizer stirring device in the self-propelled fertilizer spreader.
FIG. 10 is a sectional view taken along the line AA in FIG. 9;
FIG. 11 is a plan view for explaining a movement form of a stirring arm in the fertilizer stirring device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Body frame 1a, 1b ... Driving wheel 1c ... Tail wheel 2 ... Small engine 2a ... V belt 3 ... Vertical frame 3a, 3b ... Steering bifurcated handle 5 ... Transmission part 6 ... Travel driving axle 7 ... Vertical axis Spray drive shaft 7a Boss 9a Spray blade 9 Rotary spray plate 11 Disc-shaped shutter plate 11a, 25b Fertilizer drop hole 24 Fertilizer spraying device 25 Fertilizer tank (fertilizer hopper)
25a bottom plate 30, 50 fertilizer stirring device 31 fastening bolt 32 stirring arm 32a bolt 33 eccentric shaft 33a shaft hole 33b lateral screw hole 33c reduced diameter projection 34 planetary wheel 34a cylindrical wall 35 Reference numeral 60: magnetic coupling 35a: magnetic plate 35aa: annular bottom plate 35ab: magnetic plate 35b with holes: bottom surface 36: ball bearing 36a: outer ring 36b: inner ring 36c: steel balls 37, 38 ... retaining ring 51: dustproof cover 61: back yoke Disk 62: First magnet plate 63: Second magnet plate M1, M2: Magnetic disk d: Eccentric amount

Claims (3)

With a fertilizer drop hole at the bottom, a fertilizer tank for storing fertilizer, and turning inside the fertilizer tank by a vertical driven shaft in the tank for transmitting rotational driving force from outside the fertilizer tank to the inside of the tank A fertilizer stirring means having a stirring arm for stirring the stored fertilizer, the fertilizer stirring means comprising: an eccentric body that rotates eccentrically with a predetermined eccentric amount with respect to the vertical driven shaft in the tank; A planetary body which is easy to rotate about the axis of rotation and which supports the stirring arm, and which is interposed between the eccentric body and the opposing surface of the planetary body, and has a relative escape resistance of the planetary body to the eccentric body. A fertilizer spraying device having a magnetic coupling that transmits power of the eccentric body to the planetary body while allowing rotation.
The magnetic coupling has a first magnet plate fixed to the eccentric body side, and a second magnet plate overlapping the first magnet plate and fixed to the planetary body side, and both magnet plates have the rotation center of the rotation center. A fertilizer spreader, comprising: a magnetic plate with holes having a plurality of holes formed in a circle around the hole; and a magnet embedded in the holes. The fertilizer spreader according to claim 1, wherein the magnet of the first magnet plate and the magnet of the second magnet plate face each other with the same magnetic pole. The fertilizer spreader according to claim 1, wherein the magnets of the first magnet plate and the magnets of the second magnet plate face each other with different magnetic poles.

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