JP2880100B2 - Tree crusher - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

2. Description of the Related Art Examples of this kind of grinder for trees and the like include those shown in FIGS. This tree crusher,
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 a 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 is provided.

The feed roller mechanism 2 includes a centrifugal clutch 21 provided at the other end of the main shaft 11 and a rotational force transmitting means 22.
, A feed roller 23, and a spring 24. The centrifugal clutch 21 has a shoe 21b inside the drum 21a.
1b is in close contact with the drum 21a, and transmits the rotational force of the main shaft 11 to the rotational force transmitting means 22. The rotational force transmitting means 22 reduces the rotation of the main shaft 11 by a sprocket and a chain, or a belt and a pulley, and
3 The feed roller 23 feeds a material W such as a tree or a straw, which is 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 crusher for trees or the like configured as described above, when the main shaft 1 is rotated at a high speed by the engine, the hammer 14 also turns at a high speed, and the material W is crushed by the hammer 14 and immediately formed into chips. Will be done.
Also, since the main shaft 11 rotates at a high speed, the centrifugal clutch 2
1 are connected, and the rotation of the main shaft 11 is transmitted to the feed roller 23 via the rotational force transmitting means 22. For this reason, for example, the material W put into the hopper is fed into the shredder hammer mechanism 1 by a fixed amount by the feed roller 23.

[0005] However, when the material W is supplied in a large amount, the material W may be sent into the shredder hammer mechanism 1 more than the pulverizing ability of the hammer 14. In this case, the rotational speed of the main shaft 11 decreases with an increase in the load of the hammer 14, so that the centrifugal clutch 21 is disengaged, and the material W can be further fed into the shredder hammer mechanism 1. Disappears. Thereby, the hammer 14
Since the overload state is eliminated, the main shaft 11 rotates at the high speed as before. Then, the centrifugal clutch 21 is connected and the feed roller 23 is connected.
Starts rotating, and feeds the material W into the shredder hammer mechanism 1. Therefore, always a certain amount of material W
Can be stably formed into chips.

[0006]

However, in the above-mentioned grinders for trees and the like, a large amount of the material W or a material exceeding the input size is charged.
The feed roller 23 itself becomes overloaded, and the rotation of the feed roller 23 may decrease or stop.
In this case, the rotational force of the main shaft 11 is directly transmitted to the feed roller 2 via the centrifugal clutch 21 and the rotational force transmitting means 22.
3, the centrifugal clutch 21 and the chain or the belt are overloaded, and the centrifugal clutch 21 may slip or the chain or the belt may be cut off. That is, there is a disadvantage that the shoe 21b of the centrifugal clutch is worn, and there is a possibility that the chain and the belt may be cut.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problem, and has as its object to provide a tree or the like in which a centrifugal clutch is not worn by slippage even when the load on a feed roller increases. A crusher is provided.

[0008]

In order to achieve the above object, the present invention provides 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. A shredder hammer mechanism having a main shaft that is driven to rotate, a hammer that rotates together with the main shaft, and crushes the material into chips, the feed roller mechanism includes: 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 to the hydraulic pump when the rotational speed of the main shaft is equal to or higher than a predetermined rotational speed. The valve regulator has a relief pressure set so that the hydraulic pump rotates so that the centrifugal clutch does not slip and the power transmission means for driving the feed roller such as a chain or belt does not become overloaded. And

A crusher for trees is provided with 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 mechanisms.
The chipper knife mechanism includes a cutter holding unit that is rotationally driven by a main shaft, and a cutter provided on the cutter holding unit and crushes the material into chips. The feed roller mechanism includes a chipper knife mechanism. Feed roller, and a hydraulic motor that drives the feed roller,
A hydraulic pump for supplying a hydraulic pressure to the hydraulic motor, a pressure adjusting valve for setting a discharge pressure of the hydraulic pump to a predetermined relief pressure, and, when the rotation speed of the main shaft is equal to or higher than a predetermined rotation speed, A centrifugal clutch that transmits the rotational force of the hydraulic pump to the hydraulic pump side, and the pressure regulating valve is configured so that the hydraulic pump rotates without the centrifugal clutch slipping.
It is characterized in that a relief pressure is set.

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

In the present invention, when the main shaft rotates at a high speed, the hammer rotates at a high speed, and the material is crushed by the hammer and immediately formed into chips. Further, since the main shaft rotates at a 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.

[0012] Here, it is assumed that the material is fed into the shredder hammer mechanism more than the crushing ability of the hammer due to the large amount of material input. In this case, as the load on the hammer increases, the number of revolutions of the main shaft decreases, so that the centrifugal clutch is disconnected, the hydraulic pump stops, and the material is further fed into the shredder hammer mechanism. Disappears. As a result, the overload state of the hammer is eliminated, so that the spindle rotates again at the high speed as before. Then, the centrifugal clutch is connected, the hydraulic pump rotates, and hydraulic pressure is supplied from the hydraulic pump to the hydraulic motor. For this reason, the feed roller starts rotating and feeds the material into the shredder hammer mechanism. Therefore, always
A certain amount of material can be stably formed into chips.

Further, it is assumed that the feed roller itself is overloaded due to a large amount of material being charged or a material (stroke or more) exceeding the size that can be charged. In this case, the discharge pressure of the hydraulic pump may increase 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 regulating valve in this way, all the oil discharged from the hydraulic pump escapes from the pressure regulating valve to, for example, a 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 relief pressure is reached,
A force for continuously rotating 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 the centrifugal clutch slipping, the centrifugal clutch does not slip. Therefore, even if the load of 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 a high speed, the cutter holding means rotates at a high speed, and the material is cut by the cutter and immediately formed into chips. become. Further, since the main shaft rotates at a 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 more than the pulverizing ability of the cutter due to a large amount of material being supplied. In this case, the rotational speed of the spindle decreases with an increase in the load on the cutter, so that the centrifugal clutch is disengaged, the hydraulic pump is stopped, and the material is further fed into the chipper knife mechanism. Disappears. As a result, the overload state of the cutter is eliminated, so that the main shaft rotates again at the high speed as before. Then, the centrifugal clutch is connected, the hydraulic pump rotates, and hydraulic pressure is supplied from the hydraulic pump to the hydraulic motor. For this reason, the feed roller starts rotating and feeds the material into the chipper knife mechanism. Therefore, a fixed amount of material can always be stably formed into chips.

Further, when a large amount of material is supplied or a material exceeding a supplyable size is supplied, the feed roller itself may be overloaded. In this case, the same operation as that of the feed roller mechanism provided in the above-described shredder hammer mechanism is performed, and thus the description is omitted.

Further, a switching valve capable of rotating the hydraulic motor forward and backward and a lever for operating the switching valve are provided. When the feed roller stops, the lever is rotated in the reverse direction. By switching to the direction,
The material can be returned to the other side. Therefore, even when the material is jammed in the feed roller, this clogging can be immediately eliminated.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. However, the same elements as those of the conventional example shown in FIGS. 7 and 8 are denoted by the same reference numerals, and description thereof will be simplified. The main difference between this embodiment and the conventional example is that the rotational force of the centrifugal clutch 21 is
The point is that the transmission is performed to the feed roller 23 via the hydraulic pump 25 and the hydraulic motor 26.

That is, as shown in FIG. 4, the crusher for trees and the like according to this embodiment is movable by wheels T, and is mounted on a body frame F by an engine E and driven by the engine E. A crushing device 4 is provided. As shown in FIG. 5, the pulverizing 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 by a cover 9.

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

The chipper knife mechanism 6 is suitable for pulverizing a material W such as a relatively large tree, for example, a tree trunk. The chipper knife mechanism 6 includes a disk body (cutter holding means) 61 connected to the main shaft 11 and And a cutter 62 provided on the disk 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. The blower fan 10 crushes chips crushed by the shredder hammer mechanism 1 and the chipper knife mechanism 6,
The air is discharged from the duct 5 (see FIG. 3).

Further, a centrifugal clutch 21 is provided at the other end of the main shaft 11 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. The output pulley 221 is connected to the idle pulley 2 via a first belt 222 as shown in FIGS.
23. The floating pulley 223 is connected to an input pulley 225 provided on an input shaft of the hydraulic pump 25 via a second belt 224. Then, the output pulley 221, the first belt 222,
The idler pulley 223, the second belt 224, and the input pulley 225 form a rotational force transmitting unit 22.

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

As shown in FIGS. 1 to 3, the hydraulic pump 25 is fixed on a vehicle body frame F with bolts, and the rotational force of the main shaft 11 is input from an input pulley 225. The discharge port of the hydraulic pump 25 includes:
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 includes an upwardly extending lever 27a.
By operating the lever 27a, the hydraulic motor 26 can be rotated forward or backward. That is, as shown in FIG. 3, when the lever 27a is tilted from the neutral position to one side, the oil to be rotated in the normal direction flows to the hydraulic motor 26, and when the lever 27a is tilted to the other side, the oil to be rotated in the reverse direction is changed. The fluid flows to the hydraulic motor 26. When the lever 27a is in the neutral position, the oil discharged from the hydraulic pump 25 returns to the hydraulic tank 30 through the switching valve 27 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 rotation force smaller than the transmission torque of the centrifugal clutch 21 and with a rotation force smaller than the transmission force of the chain 233. ing. That is, the relief pressure of the pressure regulating valve is set such that the hydraulic pump 25 rotates without the centrifugal clutch 21 slipping and the chain 233 being cut. Further, each component of the rotational force transmitting means 22 and an input sprocket 2 described later are used.
32, output sprocket 262, chain 233, etc.
Even if the centrifugal clutch 21 is applied with a rotational force such that the centrifugal clutch 21 slips, the centrifugal clutch 21 is not damaged and has a sufficiently large strength.

The hydraulic motor 26 is provided on a bracket 28 that can move up and down. The bracket 28
A side surface 111 of an input port 110 of the 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 ends of these side plates 281 and 282. The hydraulic motor 26 is fixed to the side plate 281 such that the output shaft 261 protrudes outward from the one side plate 281. A feed roller 23 is provided above the bracket 28. The feed roller 23
It is rotatably held by two side plates 281 and 282, and its input shaft 231 is provided so as to protrude outward from one side plate 281.

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

As shown in FIG. 2, the urging means 29 urges the cylinder 291, a rod 292 that enters and exits from one end of the cylinder 291, and a direction in which the rod 292 enters the cylinder 291. And a spring 293. The cylinder 291 is
One end of the rod 292 is fixed to the vehicle body frame F with a bolt facing upward, and the rod 292 has a distal end fixed to the substrate 283 with a bolt.

Further, the side surfaces 111, 1
12, a feed roller 23 is provided together with a bracket 28,
A long 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
1, rotational force transmitting 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, urging means 29, hydraulic tank 30, input port 110, It has a configuration provided with a pressure regulating valve (not shown).

In the crusher such as a tree constructed as described above, when the main shaft 11 rotates at a high speed by the driving force of the engine E, the hammer 14 moves at a high speed and the material W
Is crushed by the hammer 14 and immediately turned into chips. Further, since the main shaft 11 rotates at a high speed, the centrifugal clutch 21 is connected, and the rotational force transmitting means 22
, The rotational force of the main shaft 11 is transmitted to the hydraulic pump 25. 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 charged into the hopper 7 is
Is fed into the shredder hammer mechanism 1 by the feed roller 23. At this time, the input material W
The feed roller 23 moves up and down together with the bracket 28 according to the size of. However, since the bracket 28 is constantly urged downward by the urging means 29, the feed roller 23 can feed the material W into 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 pulverizing ability of the hammer 14 due to the large amount of the material W being supplied. In this case, the rotational speed of the main shaft 11 decreases with an increase in the load of the hammer 14, so that the centrifugal clutch 21 is disengaged, the hydraulic pump 25 is stopped, and the material W is further reduced by the shredder hammer mechanism 1. Will not be sent inside. However, this eliminates the overload state of the hammer 14, so that the main shaft 11 rotates again at a high speed as before. Then, the centrifugal clutch 21 is connected, the hydraulic pump 25 starts rotating, and hydraulic pressure is supplied from the hydraulic pump 25 to the hydraulic motor 26. Therefore, the feed roller 23 starts rotating, and the material W is fed into the shredder hammer mechanism 1. Therefore, a constant amount of the material W can always be stably formed into chips.

Further, it is assumed that the feed roller 23 itself is overloaded due to a large amount of material W being supplied or a material W having a size larger than the stroke (material W exceeding the allowable size). I 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 control valve in this manner, all the oil discharged from the hydraulic pump 25 escapes from the pressure control valve to, for example, the hydraulic tank 30, and does not flow to the hydraulic motor 26. . Therefore, the hydraulic motor 26
Stops, and the feed roller 23 stops. However, even when the feed roller 23 is stopped, the driving force of the hydraulic pump 25 is not
Will continue to work. However, since the force for driving the hydraulic pump 25 is smaller than the force transmitted by the centrifugal clutch 21 by setting 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 transmitting means 22 and the chain 233 are not damaged at all.

When the feed roller 23 stops, the material W can be returned to the opposite side by immediately switching the lever 27a in the reverse direction. Therefore, even when the material W is jammed in the feed roller 23, 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 the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

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

The chipper knife mechanism 6 is provided with a feed roller 23 at a portion of the inlet 110 for the chipper knife mechanism 6. Three feed rollers 23 are provided, and two upper rollers move up and down according to the size of the material W put into the chipper hopper 8. Although not shown in its entirety, the feed roller mechanism 2 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 in that a hydraulic motor (not shown) and each feed roller 23 are connected so that the feed rollers 3 can move up and down independently of each other.
Is different.

In the crusher for trees or the like configured as described above, when the main shaft 11 rotates at a high speed, the disk (cutter holding means) 61 rotates at a high speed, and the material W is cut by the cutter 62. Will be made into chips. The material W thus primarily pulverized 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 pulverized. The material W thus secondarily pulverized is discharged from the duct 5 to the outside by the blower fan 10.

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 a hydraulic pump (not shown). Then, hydraulic pressure is supplied from a hydraulic pump to a hydraulic motor (not shown), and the feed roller 23 is rotated by the hydraulic motor, so that 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 pulverizing ability of the chipper knife mechanism 6 and the shredder hammer mechanism 1 by being supplied in a large amount. In this case, the rotational speed of the main shaft 11 decreases with an increase in the load on the cutter 62 and an increase in the load on the hammer 14, so that 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 overload state of the cutter 62 and the hammer 14 is eliminated, so that the main shaft 11 rotates at a high speed as before. Then, the centrifugal clutch 21 is connected, the hydraulic pump rotates, and hydraulic pressure is supplied from the hydraulic pump to the hydraulic motor. Therefore, the feed roller 23 starts rotating, and the material W
Is sent to the chipper knife mechanism 6. Therefore, a constant amount of the material W can always be stably formed into chips.

Further, when the material W is supplied in a large amount or the material W exceeding the available size is supplied, the feed roller 23 itself may be overloaded. 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 also be provided in the chipper knife mechanism 6. Further, 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 hopper 7 is also provided in the shredder hammer mechanism 1.
And a feed roller mechanism 2 may be provided.

[0045]

According to the present invention, when the material is fed into the shredder hammer mechanism more than the pulverizing ability of the hammer by inputting a large amount of the material, the load of the hammer is increased. The centrifugal clutch is disengaged, the hydraulic pump stops,
No more material is fed into the shredder hammer mechanism. However, this eliminates the overload condition of the hammer, so that the main shaft rotates again at the high speed as before. Then, the centrifugal clutch is engaged, the hydraulic pump starts rotating, and hydraulic pressure is supplied from the hydraulic pump to the hydraulic motor. For this reason, the feed roller starts rotating and feeds the material into the shredder hammer mechanism. Therefore, a fixed amount of material can always be stably formed into chips.

When the feed roller itself is overloaded due to a large amount of material being supplied or a material exceeding the supplied size, the discharge pressure of the hydraulic pump increases. Eventually, the relief pressure of the pressure regulating valve may be reached. When the discharge pressure of the hydraulic pump reaches the relief pressure of the pressure regulating valve in this way, all the oil discharged from the hydraulic pump escapes from the pressure regulating valve to, for example, a 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 driving force of 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 increases and the feed roller stops, the centrifugal clutch does not slip and wear, and the chain and sprocket are not damaged.

Further, even in the case where the feed roller mechanism is provided in the chipper knife mechanism, the same effect as in the case where the feed roller mechanism is provided in the above-described shredder hammer mechanism can be obtained.

Further, in the case where a switching valve capable of rotating the hydraulic motor forward and backward and a lever for operating the switching valve are provided, the lever is rotated in reverse when the feed roller stops. Switching between directions allows the material to return to the opposite side. Therefore, even when the material is jammed in the feed roller, this clogging can be immediately eliminated.

[Brief description of the drawings]

FIG. 1 is a sectional view of a grinder for trees and the like shown as a first embodiment of the present invention, taken along line II of FIG. 2;

FIG. 2 is a view showing a crusher for trees and the like, and FIG.
Sectional drawing along 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 a crusher for trees and the like.

FIG. 5 is a side view showing a crusher of the crusher for trees and the like.

FIG. 6 is a side sectional view of a grinder 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 grinder for trees and the like shown as a conventional example.

FIG. 8 is a side view of a main part of the crusher for trees and the like.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Shredder hammer mechanism 2 Feed roller mechanism 6 Chipper knife mechanism 11 Main shaft 14 Hammer 21 Centrifugal clutch 23 Feed roller 25 Hydraulic pump 26 Hydraulic motor 27 Switching valve 27a Lever 61 Cutter holding means (disc body) 62 Cutter W Material

Claims (3)

(57) [Claims] A shredder hammer mechanism for crushing a material such as a tree or a straw, and a crusher for a tree or the like including a feed roller mechanism for feeding the material to the shredder hammer mechanism, wherein the shredder hammer mechanism comprises: A spindle driven to rotate,
A hammer that rotates together with the main shaft and crushes the material into chips; the feed roller mechanism includes: a feed roller that feeds the material to a shredder hammer mechanism; a hydraulic motor that drives the feed roller; A hydraulic pump for supplying hydraulic pressure to the motor,
A pressure regulating valve for setting 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 to the hydraulic pump when the rotational speed of the main shaft becomes equal to or higher than a predetermined rotational speed. The pressure regulating valve, without the centrifugal clutch slipping,
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 crusher for trees and the like, comprising: 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, wherein the chipper knife mechanism is rotated by a main shaft. A driven cutter holding means, and a cutter provided on the cutter holding means, for crushing the material into chips, the feed roller mechanism sending a material to a chipper knife mechanism, A hydraulic motor that drives the rollers, a hydraulic pump that supplies hydraulic pressure to the hydraulic motor, a pressure regulating valve that sets the discharge pressure of the hydraulic pump to a predetermined relief pressure, and the number of revolutions of the spindle is equal to or greater than a number of revolutions And a centrifugal clutch that transmits the rotational force of the main shaft side to the hydraulic pump side when the pressure is adjusted. A crusher for trees and the like, wherein a relief pressure is set so that a hydraulic pump rotates. 3. A crushing method for trees and the like according to claim 1, wherein a switching valve capable of rotating the hydraulic motor forward and backward is provided, and a lever for operating the switching valve is provided. Machine.