JPH09123126A - Tree and the like comminutor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the damage attrition of a centrifugal clutch due to slip even if the load of a feed roller is increased by so setting a relief pressure as to rotate a hydraulic pump in such a manner that power transmission means is not overloaded without slipping the clutch by a pressure regulating valve. SOLUTION: When a feed roller 23 itself becomes an overload state due to the introduction of a large quantity of material or material of a size larger than a stroke, the pressure of a hydraulic pump 25 is raised to reach the relief pressure of a pressure regulating valve, the oil discharged from the pump 25 is all released from the valve, a hydraulic motor 26 is stopped, and the roller 23 is stopped. However, the force for driving the pump 25 is sequentially operated through rotary force transmitting means 22. But, since the relief pressure of the valve of the pump 25 is so set that the force for driving the pump 25 becomes smaller than the force transmitted via a centrifugal clutch 21, no slip occurs at the clutch 21.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tree crusher for crushing materials such as trees and straw to reduce the capacity.

[0002]

2. Description of the Related Art As a crusher for trees of this type, there is, for example, one shown in FIGS. This tree crusher has
A shredder hammer mechanism 1 and a feed roller mechanism 2 are provided. The shredder hammer mechanism 1 includes a main shaft 11 that is rotationally driven from one end by an engine (not shown).
A plurality of connecting members 12 extending in the radial direction from the main shaft 11, a hammer holding shaft 13 rotatably connected to the connecting members 12, and a plurality of hammers rotatably provided on the hammer holding shaft 13. 14 and.

The feed roller mechanism 2 has a centrifugal clutch 21 provided at the other end of the main shaft 11 and a rotational force transmitting means 22.
And a feed roller 23 and a spring 24. The centrifugal clutch 21 has a shoe 21b inside the drum 21a, and as the rotational speed increases, the shoe 2
1b is in close contact with the drum 21a and transmits the rotational force of the main shaft 11 to the rotational force transmission means 22. The rotational force transmission means 22 decelerates the rotation of the main shaft 11 by a sprocket and a chain, or a belt and a pulley, and the feed roller 2
3 The feed roller 23 feeds a material W such as a tree and straw put into a hopper (not shown) into the shredder hammer mechanism 1. The spring 24 presses the feed roller 23 against the material W with a predetermined force.

In the tree crusher constructed as described above, when the main shaft 1 is rotated at a high speed by the engine, the hammer 14 is also swung at a high speed, the material W is crushed by the hammer 14 and immediately made into chips. Will be done.
Further, since the main shaft 11 rotates at high speed, the centrifugal clutch 2
1 is connected, and the rotation of the main shaft 11 is transmitted to the feed roller 23 via the rotational force transmission means 22. Therefore, for example, the material W put into the hopper is fed into the shredder hammer mechanism 1 by the feed roller 23 in a constant amount.

However, when the material W is charged in a large amount, the material W may be fed into the shredder hammer mechanism 1 beyond the crushing capacity of the hammer 14. In this case, as the load on the hammer 14 increases, the rotation speed of the main shaft 11 decreases, so that the centrifugal clutch 21 is disengaged, and the material W may be fed into the shredder hammer mechanism 1 further. Disappear. This allows the hammer 14
Since the overload condition of 1 will be eliminated, the spindle 11 will rotate again at high speed. Then, the centrifugal clutch 21 is engaged and the feed roller 23
Starts to rotate and feeds the material W into the shredder hammer mechanism 1. Therefore, always a certain amount of material W
Can be stably chipped.

[0006]

However, in the above-mentioned crusher for trees and the like, the material W is charged in a large amount, or a material exceeding the charging size is charged,
The feed roller 23 itself may be overloaded and the rotation of the feed roller 23 may be reduced or stopped.
In this case, the rotational force of the main shaft 11 is directly transmitted via the centrifugal clutch 21 and the rotational force transmission means 22 to the feed roller 2
Therefore, the centrifugal clutch 21 and the chain or the belt may be overloaded, and the centrifugal clutch 21 may slip or the chain or the belt may be broken. That is, there is a drawback that the shoe 21b of the centrifugal clutch may be worn and that the chain and the belt may be broken.

The present invention has been made to solve the above-mentioned problems, and an object thereof is to prevent a centrifugal clutch from being worn by a slip even if the load of a feed roller is increased. To provide a crusher.

[0008]

To achieve the above object, the present invention comprises a shredder hammer mechanism for crushing materials such as trees and straw, and a feed roller mechanism for feeding the material to the shredder hammer mechanism. A shredder hammer mechanism provided with, wherein the shredder hammer mechanism has a main shaft that is driven to rotate, and a hammer that rotates together with the main shaft to crush the material into chips, and the feed roller mechanism, A feed roller that feeds the material to the shredder hammer mechanism, a hydraulic motor that drives the feed roller, a hydraulic pump that supplies hydraulic pressure to the hydraulic motor, and a pressure adjustment valve that sets the discharge pressure of the hydraulic pump to a predetermined relief pressure. And a centrifugal clutch for transmitting the rotational force of the main shaft side to the hydraulic pump side when the rotational speed of the main shaft exceeds a predetermined rotational speed. The pressure regulating valve is characterized in that the relief pressure is set so that the centrifugal clutch does not slip and the hydraulic pump rotates so as not to overload the power transmission means that drives the feed rollers such as the chain and the belt. I am trying.

Further, there is provided a crusher for trees and the like, which comprises a chipper knife mechanism for crushing materials such as trees and straw, and a feed roller mechanism for feeding the materials to the chipper knife mechanism,
The chipper knife mechanism has a cutter holding means that is driven to rotate by a main shaft, and a cutter that is provided on the cutter holding means and crushes the material into chips, and the feed roller mechanism has a chipper knife mechanism. And a hydraulic motor for driving the feed roller,
A hydraulic pump that supplies hydraulic pressure to the hydraulic motor, a pressure adjusting valve that sets the discharge pressure of the hydraulic pump to a predetermined relief pressure, and the main spindle when the rotational speed of the main spindle exceeds a predetermined rotational speed. A centrifugal clutch for transmitting the rotational force of the hydraulic pump to the hydraulic pump side, and the pressure adjusting valve is configured so that the hydraulic pump rotates without the centrifugal clutch slipping.
It is characterized by the relief pressure being set.

Further, it is preferable to provide a switching valve capable of rotating the hydraulic motor in the forward and reverse directions and a lever for operating the switching valve.

Further, in the present invention, when the main shaft rotates at a high speed, the hammer rotates at a high speed, the material is crushed by the hammer, and chips are immediately formed. Further, since the main shaft rotates at high speed, the centrifugal clutch is engaged, and the rotational force of the main shaft is transmitted to the hydraulic pump. Then, hydraulic pressure is supplied from the hydraulic pump to the hydraulic motor, and the feed roller is rotated by the hydraulic motor.

Here, it is assumed that the material is fed into the shredder hammer mechanism in excess of the crushing capacity of the hammer by a large amount of the material being charged. In this case, as the load on the hammer increases, the rotational speed of the main shaft will decrease, so the centrifugal clutch will disengage, the hydraulic pump will stop, and more material will be sent into the shredder hammer mechanism. Disappears. As a result, the overloaded state of the hammer will be eliminated, and the spindle will rotate again at high speed. Then, the centrifugal clutch is engaged, the hydraulic pump rotates, and the hydraulic pressure is supplied from the hydraulic pump to the hydraulic motor. Therefore, the feed roller starts to rotate and feeds the material into the shredder hammer mechanism. Therefore, always
A certain amount of material can be stably chipped.

It is also assumed that the feed roller itself is overloaded due to a large amount of material being charged, or a material exceeding the allowable size (stroke or more) being charged. In this case, the discharge pressure of the hydraulic pump may rise and eventually reach the relief pressure of the pressure regulating valve. When the discharge pressure of the hydraulic pump reaches the relief pressure of the pressure adjusting valve in this way, all the oil discharged from the hydraulic pump escapes from the pressure adjusting valve to, for example, the hydraulic tank and does not flow to the hydraulic motor. Therefore, the rotation of the hydraulic motor stops and the feed roller stops. However, even if such a relief pressure is reached,
The force that continues to rotate the hydraulic pump acts from the centrifugal clutch side. However, since the relief pressure of the pressure regulating valve is set so that the hydraulic pump rotates without slipping the centrifugal clutch, the centrifugal clutch does not slip. Therefore, even if the load on the feed roller increases and the feed roller stops, the centrifugal clutch does not slip and wear.

On the other hand, in the case where the feed roller mechanism is provided in the chipper knife mechanism, when the main shaft rotates at high speed, the cutter holding means rotates at high speed and the material is cut by the cutter and immediately cut into chips. become. Further, since the main shaft rotates at high speed, the centrifugal clutch is engaged, and the rotational force of the main shaft is transmitted to the hydraulic pump. Then, hydraulic pressure is supplied from the hydraulic pump to the hydraulic motor, and the feed roller is rotated by the hydraulic motor.

Here, it is assumed that the material is fed into the chipper knife mechanism in excess of the crushing capacity of the cutter by a large amount of the material being charged. In this case, as the load on the cutter increases, the rotational speed of the main shaft will decrease, so the centrifugal clutch will disengage, the hydraulic pump will stop, and more material will be fed into the chipper knife mechanism. Disappear. As a result, the overload condition on the cutter is eliminated, so that the spindle rotates again at high speed. Then, the centrifugal clutch is engaged, the hydraulic pump rotates, and the hydraulic pressure is supplied from the hydraulic pump to the hydraulic motor. Therefore, the feed roller starts rotating and feeds the material into the chipper knife mechanism. Therefore, a certain amount of material can always be stably chipped.

Further, the feed roller itself may be overloaded due to a large amount of material being charged or a material having a size exceeding the allowable size being charged. In this case, the same operation as that of the feed roller mechanism provided in the shredder hammer mechanism described above is performed, and thus the description thereof is omitted.

Further, in the case where a switching valve capable of rotating the hydraulic motor in the forward and reverse directions is provided and a lever for operating the switching valve is provided, the lever is reversed when the feed roller is stopped. By switching to the direction,
The material can be returned to the other side. Therefore, even if the feed roller is clogged with material, this clogging can be immediately eliminated.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION A first embodiment of the present invention will be described below with reference to FIGS. However, elements common to the constituent elements of the conventional example shown in FIGS. 7 to 8 are given the same reference numerals to simplify the description. This embodiment is different from the conventional example in that the rotational force of the centrifugal clutch 21 is
It is configured so that it is transmitted to the feed roller 23 via the hydraulic pump 25 and the hydraulic motor 26.

That is, the crusher for trees and the like of this embodiment is movable by wheels T as shown in FIG. 4, and is driven by the engine E and the engine E on the body frame F. A crushing device 4 is provided. As shown in FIG. 5, the crushing device 4 includes a shredder hammer mechanism 1 and a chipper knife mechanism 6, and the shredder hammer mechanism 1 is provided with a shredder hopper 7,
The chipper knife mechanism 6 is provided with a chipper hopper 8. The shredder hammer mechanism 1 and the chipper knife mechanism 6 are covered with a cover 9.

The shredder hammer mechanism 1 is suitable for crushing a large amount of material W such as relatively small trees such as tree branches. The shredder hammer mechanism 1 is driven by an engine E from a main shaft 11 and is rotated. , A plurality of connecting members 12 extending in the radial direction from the main shaft 11, and these connecting members 1
A hammer holding shaft 13 rotatably connected to the shaft 2 and a hammer 14 rotatably provided on the hammer holding shaft 13.

The chipper knife mechanism 6 is suitable for crushing a material W such as a relatively large tree or the like, for example, a tree trunk or the like, and a disc body (cutter holding means) 61 connected to the main shaft 11 and And a cutter 62 provided on the disc body 61.

A blower fan 10 is provided on the main shaft 11 between the shredder hammer mechanism 1 and the chipper knife mechanism 6. This blower fan 10 uses chips shredded by the shredder hammer mechanism 1 and the chipper knife mechanism 6,
It is designed to be discharged from the duct 5 (see FIG. 3).

Further, the main shaft 11 is provided with a centrifugal clutch 21 at the other end opposite to the engine E.
The centrifugal clutch 21 is provided with an output pulley 221 for extracting a rotational force from the centrifugal clutch 21. As shown in FIGS. 1, 3 and 4, this output pulley 221 is provided with a floating pulley 2 via a first belt 222.
It is connected to 23. The floating pulley 223 is connected to the input pulley 225 provided on the input shaft of the hydraulic pump 25 via the second belt 224. Then, these output pulley 221, the first belt 222,
The idle pulley 223, the second belt 224, and the input pulley 225 make up the rotational force transmitting means 22.

The centrifugal clutch 21 has a drum 21a and a shoe 21b (see FIG. 6) like the conventional one, and the shoe 21b is attached to the drum 21a as the rotation speed of the main shaft 11 increases. Close contact with the same spindle 11
Is transmitted to the output pulley 221.

As shown in FIGS. 1 to 3, the hydraulic pump 25 is fixed to the vehicle body frame F with bolts, and the rotational force of the main shaft 11 is input from the input pulley 225. At the discharge port of the hydraulic pump 25,
A switching valve 27 is provided, and the A port and the B port of the switching valve 27 are connected to the hydraulic motor 26 via hoses 271 and 272.

The switching valve 27 has a lever 27a extending upward.
By operating this lever 27a, the hydraulic motor 26 can be rotated in the normal direction or the reverse direction. That is, as shown in FIG. 3, when the lever 27a is tilted from the neutral position to one side, oil for rotating in the forward rotation direction flows to the hydraulic motor 26, and when tilted to the other side, oil for rotating in the reverse rotation direction is released. It flows to the hydraulic motor 26. Further, when the lever 27a is set to the neutral position, the oil discharged from the hydraulic pump 25 passes through the switching valve 27 and returns to the hydraulic tank 30 as it is.
That is, when the lever 27a is in the neutral position, the hydraulic motor 26 does not rotate.

A pressure control valve (not shown) for setting the discharge pressure of the hydraulic pump 25 to a predetermined relief pressure is provided between the hydraulic pump 25 and the switching valve 27.
The relief pressure of this pressure control valve is set so that the hydraulic pump 25 can be driven with a rotational force smaller than the rotational force transmitted by the centrifugal clutch 21 and a rotational force smaller than the transmitted force of the chain 233. ing. That is, the relief pressure of the pressure regulating valve is set so that the hydraulic pump 25 rotates without slipping the centrifugal clutch 21 and without breaking the chain 233. Further, each component of the rotational force transmitting means 22 and the input sprocket 2 described later.
32, the output sprocket 262, the chain 233, etc.
Even if the centrifugal clutch 21 is subjected to a rotational force such as slipping, the centrifugal clutch 21 is not damaged and is made of a material having a sufficiently large strength.

The hydraulic motor 26 is provided on a bracket 28 that can move up and down. The bracket 28 is
Side surface 111 of input port 110 of shredder hammer mechanism 1,
Two side plates 281 and 2 movable up and down along 112
82, and a substrate 283 provided so as to connect the lower end portions of these side plates 281 and 282. The hydraulic motor 26 is fixed to the side plate 281 so that the output shaft 261 of the hydraulic motor 26 projects from one side plate 281 to the outside. A feed roller 23 is provided on the bracket 28. The feed roller 23 is 2
It is rotatably held by two side plates 281 and 282, and its input shaft 231 is provided so as to protrude from one side plate 281 to the outside.

As shown in FIG. 1, the output shaft 261 of the hydraulic motor 26 is provided with an output sprocket 262, and the input shaft 231 of the feed roller 23 is provided with an input sprocket 232. Further, the output sprocket 262 and the input sprocket 232 are connected by a chain 233. Further, the substrate 283 is connected to a biasing means 29 that acts so as to pull down the center portion in the width direction thereof.

As shown in FIG. 2, the urging means 29 urges a tubular body 291, a rod 292 that moves in and out from one end of the tubular body 291, and a direction in which the rod 292 enters the tubular body 291. And a spring 293. The cylinder 291 is
The one end of the rod 292 is fixed to the vehicle body frame F with bolts, and the tip of the rod 292 is fixed to the substrate 283 with bolts.

The side faces 111, 1 of the charging port 110 are also described.
12, the feed roller 23 together with the bracket 28,
An elongated hole 110a for moving in the vertical direction is provided. The feed roller mechanism 2 is provided only for the shredder hammer mechanism 1, and the centrifugal clutch 2 is provided.
1, rotational force transmission means 22, feed roller 23, input shaft 23
1, input sprocket 232, chain 233, hydraulic pump 25, hydraulic motor 26, output shaft 261, output sprocket 262, switching valve 27, hoses 271, 272, bracket 28, biasing means 29, hydraulic tank 30, input port 110, It is configured to include a pressure control valve (not shown).

In the tree crusher constructed as described above, when the main shaft 11 is rotated at high speed by the driving force of the engine E, the hammer 14 is swung at high speed and the material W
Will be crushed by the hammer 14 and immediately chipped. Further, since the main shaft 11 rotates at a high speed, the centrifugal clutch 21 is connected and the rotational force transmitting means 22 is connected.
The rotational force of the main shaft 11 is transmitted to the hydraulic pump 25 via. Then, hydraulic pressure is supplied from the hydraulic pump 25 to the hydraulic motor 26, and the feed roller 23 is rotated by the hydraulic motor 26.

Then, the material W put into the hopper 7
Will be fed into the shredder hammer mechanism 1 by the feed roller 23. At this time, the material W to be charged
The feed roller 23 moves up and down together with the bracket 28 according to the size of the bracket. However, since the bracket 28 is always urged downward by the urging means 29, the feeding roller 23 can feed the material W to the shredder hammer mechanism 1 while securely holding the material W.

Here, it is assumed that the material W is fed into the shredder hammer mechanism 1 more than the crushing capacity of the hammer 14 by the large amount of the material W being charged. In this case, as the load on the hammer 14 increases, the rotation speed of the main shaft 11 decreases, so that the centrifugal clutch 21 is disengaged, the hydraulic pump 25 is stopped, and the material W is further shredded. It will not be sent inside. However, as a result, the overloaded state of the hammer 14 is eliminated, so that the spindle 11 rotates again at a high speed. Then, the centrifugal clutch 21 is connected, the hydraulic pump 25 starts rotating, and the hydraulic pressure is supplied from the hydraulic pump 25 to the hydraulic motor 26. Therefore, the feed roller 23 starts rotating and feeds the material W into the shredder hammer mechanism 1. Therefore, a constant amount of the material W can be stably formed into chips.

Further, the feed roller 23 itself is overloaded due to a large amount of the material W being introduced or a material W having a size larger than the stroke (the material W exceeding the size that can be introduced) being introduced. To do. In this case,
The discharge pressure of the hydraulic pump 25 may increase and eventually reach the relief pressure of the pressure regulating valve. When the discharge pressure of the hydraulic pump 25 reaches the relief pressure of the pressure adjusting valve in this way, all the oil discharged from the hydraulic pump 25 escapes from the pressure adjusting valve to the hydraulic tank 30, for example, and does not flow to the hydraulic motor 26. . Therefore, the hydraulic motor 26
Will stop rotating and the feed roller 23 will stop. However, even if the feed roller 23 is stopped in this way, the force for driving the hydraulic pump 25 is still applied to the rotational force transmitting means 22.
Will continue to work through. However, since the force for driving the hydraulic pump 25 is smaller than the force transmitted by the centrifugal clutch 21 due to the setting of the relief pressure of the pressure control valve, the centrifugal clutch 21 does not slip. Therefore, even if the load on the feed roller 23 increases and the feed roller 23 stops, the centrifugal clutch 21 does not slip and wear. Of course, the torque transmission means 22 and the chain 233 are not damaged at all.

When the feed roller 23 is stopped, the material W can be immediately returned to the opposite side by switching the lever 27a in the reverse direction. Therefore, even when the feed roller 23 is clogged with the material W, this clogging can be immediately eliminated.

Next, a second embodiment of the present invention will be described with reference to FIG. However, elements common to those of the first embodiment are designated by the same reference numerals, and the description thereof will be omitted.

The tree crusher shown in FIG. 6 is constructed so that the material W crushed by the chipper knife mechanism 6 is crushed by the shredder hammer mechanism 1 more finely and uniformly.

The tipper knife mechanism 6 is provided with a feed roller 23 at the portion of the insertion port 110 into the tipper knife mechanism 6. Three of the feed rollers 23 are provided, and the upper two of the feed rollers 23 move up and down according to the size of the material W put into the chipper hopper 8. Further, the feed roller mechanism 2 is not shown in its entirety, but has substantially the same configuration as that shown in the first embodiment. However, the upper two feed rollers 2
The feed roller mechanism 2 shown in the first embodiment is that a hydraulic motor (not shown) and each feed roller 23 are connected so that each of them can move up and down independently.
Is different.

In the crusher for trees etc. configured as described above, when the main shaft 11 rotates at high speed, the disc body (cutter holding means) 61 rotates at high speed, the material W is cut by the cutter 62, and immediately. Will be chipped. The material W that has been primarily crushed in this way is further sent to the shredder hammer mechanism 1 by the suction force of the blower fan 10, where it is further finely and uniformly crushed. The material W thus secondarily pulverized is discharged from the duct 5 to the outside by the blower fan 10.

Further, since the main shaft 11 rotates at a high speed, the centrifugal clutch 21 is connected, and the rotational force of the main shaft 11 is transmitted to the hydraulic pump (not shown). Then, hydraulic pressure is supplied from the hydraulic pump to a hydraulic motor (not shown), and the feed roller 23 is rotated by the hydraulic motor, and the material W is fed into the chipper knife mechanism 6.

Here, it is assumed that the material W is fed into the chipper knife mechanism 1 more than the crushing ability of the chipper knife mechanism 6 and the shredder hammer mechanism 1 by the large amount of the material W being charged. In this case, the rotational speed of the main shaft 11 decreases as the load applied to the cutter 62 increases and the load applied to the hammer 14 increases. Therefore, the centrifugal clutch 21 is disengaged and the hydraulic pump is stopped. The hydraulic motor and the feed roller 23 stop, and the material W is no longer fed into the chipper knife mechanism 1. As a result, the overloaded state of the cutter 62 and the hammer 14 is eliminated, so that the spindle 11 rotates again at high speed. Then, the centrifugal clutch 21 is engaged, the hydraulic pump rotates, and the hydraulic pressure is supplied from this hydraulic pump to the hydraulic motor. Therefore, the feed roller 23 starts to rotate and the material W
Will be sent to the chipper knife mechanism 6. Therefore, a constant amount of the material W can be stably formed into chips.

Further, the feed roller 23 itself may be overloaded due to a large amount of the material W being charged or a material W having a size larger than the allowable size being charged. In this case, since the feed roller mechanism 2 operates in the same manner as the feed roller 2 of the first embodiment described above, it is possible to prevent the centrifugal clutch 21 from slipping and being worn.

In the first embodiment,
Although the feed roller mechanism 2 is provided only in the shredder hammer mechanism 1, the feed roller mechanism 2 may be provided in the chipper knife mechanism 6 as well. In addition, in the second embodiment, the chipper hopper 8 and the feed roller mechanism 2 are provided only in the chipper knife mechanism 6, but the shredder hammer mechanism 1 and the shredder hopper 7 are also provided.
Alternatively, the feed roller mechanism 2 may be provided.

[0045]

According to the present invention, when the material is fed into the shredder hammer mechanism in excess of the crushing capacity of the hammer due to the large amount of the material being charged, the load on the hammer is increased. , The rotation speed of the main shaft will decrease, the centrifugal clutch will disengage, the hydraulic pump will stop,
No more material is forced into the shredder hammer mechanism. However, as a result, the overloaded state of the hammer will be eliminated, and the spindle will rotate again at high speed. Then, the centrifugal clutch is engaged, the hydraulic pump starts rotating, and the hydraulic pressure is supplied from the hydraulic pump to the hydraulic motor. Therefore, the feed roller starts to rotate and feeds the material into the shredder hammer mechanism. Therefore, a certain amount of material can always be stably formed into chips.

Further, when the feed roller itself is overloaded due to a large amount of material being charged or a material having a size exceeding the charging size being supplied, the discharge pressure of the hydraulic pump rises. Finally, the relief pressure of the pressure control valve may be reached. When the discharge pressure of the hydraulic pump reaches the relief pressure of the pressure adjusting valve in this way, all the oil discharged from the hydraulic pump escapes from the pressure adjusting valve to, for example, the hydraulic tank and does not flow to the hydraulic motor.
Therefore, the rotation of the hydraulic motor stops and the feed roller stops. However, even when such a relief pressure is reached, the force for driving the hydraulic pump continues to act from the centrifugal clutch side. However, by setting the relief pressure of the pressure control valve, the centrifugal clutch does not slip and the hydraulic pump rotates, so that the centrifugal clutch does not slip. Therefore, even if the load of the feed roller is increased and the feed roller is stopped, the centrifugal clutch is not slipped and worn, and the chain and the sprocket are not damaged.

Even if the feed roller mechanism is provided in the chipper knife mechanism, the same effect as that in which the feed roller mechanism is provided in the shredder hammer mechanism described above can be obtained.

Further, in the case where a switching valve capable of rotating the hydraulic motor in the forward and reverse directions is provided and a lever for operating this switching valve is provided, when the feed roller is stopped, the lever is reversed. By switching the direction, the material can be returned to the opposite side. Therefore, even if the feed roller is clogged with material, this clogging can be immediately eliminated.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a crusher for trees and the like shown as a first embodiment of the present invention, taken along line I-I of FIG.

FIG. 2 is a view showing the crusher for trees and the like, which is taken along line II- of FIG.
Sectional drawing which follows the II line.

FIG. 3 is a rear end view showing the crusher for trees and the like.

FIG. 4 is a side view showing the crusher for trees and the like.

FIG. 5 is a side view showing a crusher of the same tree crusher.

FIG. 6 is a side sectional view of a crusher for trees and the like shown as a second embodiment of the present invention.

FIG. 7 is a plan view of a main part of a crusher for trees and the like shown as a conventional example.

FIG. 8 is a side view of a main part of the tree crusher.

[Explanation of symbols]

 1 Shredder Hammer Mechanism 2 Feed Roller Mechanism 6 Chipper Knife Mechanism 11 Spindle 14 Hammer 21 Centrifugal Clutch 23 Feed Roller 25 Hydraulic Pump 26 Hydraulic Motor 27 Switching Valve 27a Lever 61 Cutter Holding Means (Disc) 62 Cutter W Material

Claims (3)

[Claims] 1. A tree crusher comprising a shredder hammer mechanism for crushing materials such as trees and straws, and a feed roller mechanism for feeding the material to the shredder hammer mechanism, wherein the shredder hammer mechanism comprises: A spindle driven to rotate,
It has a hammer that rotates together with the main shaft and crushes the material into chips, and the feed roller mechanism feeds the material to a shredder hammer mechanism, a hydraulic motor that drives the feed roller, and the hydraulic pressure. A hydraulic pump that supplies hydraulic pressure to the motor,
A pressure regulating valve that sets the discharge pressure of this hydraulic pump to a predetermined relief pressure, and a centrifugal clutch that transmits the rotational force of the main spindle side to the hydraulic pump side when the number of rotations of the main spindle exceeds a predetermined number of revolutions. The pressure regulating valve has a centrifugal clutch without slipping, and
A crusher for trees and the like, wherein a relief pressure is set so that a hydraulic pump rotates so that a power transmission means for driving a feed roller such as a chain or a belt is not overloaded. 2. A tree crusher comprising a chipper knife mechanism for crushing materials such as trees and straws, and a feed roller mechanism for feeding the material to the chipper knife mechanism, wherein the chipper knife mechanism is rotated by a main shaft. The cutter holding means is driven, and the cutter holding means is provided in the cutter holding means and crushes the material into chips, and the feed roller mechanism feeds the material to a chipper knife mechanism and the feed roller. A hydraulic motor that drives the rollers, a hydraulic pump that supplies hydraulic pressure to the hydraulic motor, a pressure control valve that sets the discharge pressure of the hydraulic pump to a predetermined relief pressure, and the number of revolutions of the main shaft is equal to or greater than a certain number of revolutions. Has a centrifugal clutch that transmits the rotational force of the main shaft side to the hydraulic pump side, and the pressure adjustment valve prevents the centrifugal clutch from slipping. , A crusher for trees and the like, wherein relief pressure is set so that a hydraulic pump rotates. 3. A crushing tree or the like according to claim 1 or 2, characterized in that a switching valve capable of rotating the hydraulic motor in the forward and reverse directions is provided, and a lever for operating the switching valve is provided. Machine.