JP2002309614A - Gravel removing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a gravel removing machine which has a means for enabling a removed gravel conveying device to be operated at a proper speed according to soil. SOLUTION: The removed gravel conveying device 5, whose end has an excavation part, is mounted to a front of a self-propelled vehicle. Many gravel removing rods 15 rotated in an interlocking manner are arranged in a frame 14 of the device 5 in a longitudinal direction. Rotational speed detectors 69 and 70 for the rods 15 are provided. An operator cab of the gravel removing machine is equipped with an indicating means for indicating a rotational speed of the rod 15, which is detected by the detectors 69 and 70.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gravel removing machine for removing gravel mixed in soil such as agricultural land.

[0002]

2. Description of the Related Art In farmland that contains gravel in the ground and that freezes in winter or that has a severe outflow of earth and sand, it is necessary to remove surface gravel every few years. Various devices for removing such gravel have been proposed. For example, JP-A-2000-
Japanese Patent Publication No. 184802 proposes that a self-propelled vehicle is provided with a debris transfer device that can be adjusted vertically in front of a self-propelled vehicle, and that a conveyor is installed behind the debris transfer device.

[0003]

In the case of performing degraving on the agricultural land, changing the rotation speed in accordance with the soil quality (viscosity, particle size, or the amount of gravel) of the soil to be degraded is effective in performing effective degraving. Is preferred. For example, in the case of a sandy ground, if the debris rod is rotated at a high speed, the sand scatters, so it is necessary to rotate at a low speed. However, in the debris machine described in the above-mentioned publication, at present, operation is performed so as to obtain a suitable speed depending on the intuition of the operator. For this reason, there has been a problem that it is not always possible to operate at a suitable speed when the operator changes.

[0004] In view of the above problems, an object of the present invention is to provide a debris machine having means capable of operating a debris transfer device at a suitable speed according to the soil quality. In addition, the present invention provides a suitable torque according to the rubble stage of the rubble transport device,
It is an object of the present invention to provide a gravel machine capable of operating a gravel rod at a speed.

[0005]

According to a first aspect of the present invention, there is provided a debris excavator having a debris transfer device having an excavation portion at a front end of a self-propelled vehicle. The interlocking rotation of the gravel rod is arranged in the front-rear direction, and includes a rotational speed detector for the gravel rod. A display means for displaying the rotation speed is provided.

As described above, if the rotation speed detector and the rotation speed display means are provided so that the rotation speed of the debris rod can be recognized in the operator's cab, the speed specific to the target soil is stored, and this speed is stored. The operator controls the rotation speed of the hydraulic motor of the debris transfer device so that is maintained, so that the debris work can be performed efficiently. Further, even if the operator changes, by operating while maintaining the pre-recorded rotation speed of the debris rod, efficient debris work can be performed without requiring skill.

[0007] In the first aspect of the present invention,
The rubble rods are divided into a front rubble rod set and a rear rubble rod set, and drive the respective sets of rubble rods corresponding to the front and rear rubble rod sets. A front hydraulic motor and a rear hydraulic motor, and the rotational speed detector is provided for each of the front and rear sets of debris rods.

As described above, the group of rubble rods can be divided into a front group and a rear group, and the rubble rods of each group can be rotated at a suitable speed.

[0009] A third aspect of the present invention is the degraver according to the first or second aspect, wherein a hydraulic motor having a larger capacity than a rear hydraulic motor is used for the front hydraulic motor.

In a fourth aspect of the present invention, the relief pressure of the front hydraulic motor is higher than the relief pressure of the rear hydraulic motor.

According to a fifth aspect of the present invention, there is provided the degraving machine according to any one of the first to fourth aspects, wherein the number of the debris rods driven by the front hydraulic motor is reduced by the number of the debris rods driven by the rear hydraulic motor. The number of rods is reduced.

According to the third aspect of the present invention, each set of debris rods is driven at a suitable torque and rotational speed.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a side view showing an embodiment of a degraving machine according to the present invention, FIG. 2 is a plan view thereof, and FIG. 3 is a front view showing a main body. 1 is a crawler type traveling body,
The traveling body 1 has a crawler 1b attached to the left and right sides of a track frame 1a. In some cases, a wheeled traveling body is used as the traveling body 1.

As shown in FIG. 3, a main body frame 4 is mounted on the track frame 1a so as to be swingable left and right by two rolling hydraulic cylinders 3 on the left and right with the front and rear pins 2 at the center. The body frame 4
In front of the gravels, a debris transfer device 5 is mounted
Is mounted so as to be able to swing up and down by a hydraulic cylinder 7 around the center.

As described above, the main body frame 4 is made swingable right and left because the crawler 1b always keeps the debris conveying device 5 horizontal even when one crawler 1b runs on the raised ground after debris. The excavation portion 5a at the tip is always horizontal, the ground excavation can be performed at the same depth over the entire width, and the operator's cab 8 mounted on one or both front sides of the main body frame 4 is also kept horizontal, This is to make it easier for the operator to drive.

At the center of the main body frame 4, a first conveyor 9 (9a is a hydraulic motor for driving the first conveyor) which is inclined so as to carry the gravel carried from the debris conveying device 5 backward is mounted. Is done.

Further, a second conveyor 11 is mounted on the rear of the main body frame 4 via a turning device 10. The second conveyor 11 (11c is a hydraulic motor for driving the conveyor) includes a horizontal portion 11a for receiving gravel falling from a rear end of the first conveyor 9 and an inclined portion 11b connected thereto.
Consists of

As described above, the reason why the second conveyor 11 is made rotatable is that, as shown by a two-dot chain line in FIG. This is for projecting the upper end of the second conveyor 11 onto the bed of a truck (not shown) to be transported to the right or left side of the second conveyor 11.

As shown in FIG. 1, the inclined portion 11b is provided with a folding hydraulic cylinder 12 to reduce the height during transportation.
Is configured to be foldable forward.

On the main body frame 4, a debris transfer device 5, a first conveyor 9, and a second conveyor 11 are installed at the center.
Hydraulic power units 13a, 13
b. Each hydraulic power unit 13a, 13b
Consists of an engine, four hydraulic pumps (two main pumps, one pilot pump, and one spare pump) driven by each engine, an oil tank, and control valves.

As described above, the debris transfer device 5, the first conveyor 9, and the second conveyor 11 are arranged at the center, and the hydraulic power units 13a, 13b are divided and arranged on the left and right on the main body frame 4. The left and right weight balance is good and the whole output is large.

As can be seen from FIG. 2, the width W1 of the excavated portion 5a of the debris transfer device 5 is made smaller than the vehicle width W2 (preferably (1/3) W2≤W1≤ (2/3) W2 It is configured so that a large excavating force can be obtained.

Next, details of the debris transfer device 5 will be described. 4 is a side view of the debris transfer device 5, FIG. 5 is a plan view thereof, and FIG. 6 is a sectional view. The debris transport device 5 has a large number of interlocking rotating debris rods 15 arranged in the front-rear direction on a frame 14 having a lower surface opening, and a front excavation part 5a is formed in a tapered hoe shape.

As shown in FIG. 6, a debris rod 15 of the present embodiment has a shaft (a round shaft in this example) 16
A hole is formed in the outer surface of the device, and a number of pins 17 are implanted in the hole. A gear 18 is fixed to the end of each shaft 16, and as shown in FIG. 7, a relay gear 19 is interposed between the adjacent gears 18, 18 so as to mesh with both.

As shown in FIGS. 4 and 5, two hydraulic motors 20, 21 are mounted on the side of the frame 14.
The hydraulic motor 20 drives the region shown in FIG. 5A, that is, the front hydraulic motor that drives the front set of debris rods 15, and the hydraulic motor 21 drives the rear set of debris rods 15 shown in B and C. . That is, the gravel rod of the previous group A (10 in this example)
In the present invention, the relay gear 19 is connected to the gear 18 at the shaft end,
18 during the degraving operation (running in the direction of arrow Xa) by the front hydraulic motor 20,
The earth and sand and gravel are moved rearward by rotating at a same speed in a direction in which the upper surface moves rearward (indicated by arrow Xb). Further, the debris rods 15 of the rear sets B and C are also successively rotated at the same speed by the rear hydraulic motor 21.

In the debris rod 15 of the front set A, pins 17 are helically arranged so that the earth and sand are shifted from the outside to the inside (center side), whereby the side plate 2 provided on the frame 14 is provided.
2 to reduce the friction required for debris.

In the rear group B, in the front area B (in this example, composed of eleven debris rods 15), the pins 17 are spirally moved so that the earth and sand move from the inside (center side) to the outside. It is arranged so that the area for performing the rubble action is evenly distributed over the entire area and the rubble removal efficiency is increased.

The pin 17 in the rear area C (in this example, composed of twelve debris rods 15) of the rear group has a helical pin 17 so that the earth and sand can move from the outside to the inside (center side). , So that the earth and sand on the debris rod 15 can be put on the first conveyor 9 without spilling.

FIG. 8 is a hydraulic circuit diagram of the hydraulic motors 20 and 21. 23 and 24 are the hydraulic power unit 13
The main hydraulic pumps 25 and 26 installed in the hydraulic power units 13a and 13b are pilot hydraulic pumps installed in the hydraulic power units 13a and 13b, respectively. 27 and 28 are control valves of the hydraulic motors 20 and 21, respectively.
Reference numerals 9, 30 and 31, 32 denote proportional solenoid valves provided as pilot valves for the control valves 27, 28, respectively, and control by changing the pilot oil pressure to the control valves 27, 28 according to the magnitude of the current supplied to the solenoid. The flow rates of the valves 27 and 28 are changed, and the speeds of the hydraulic motors 20 and 21 are changed. 33,
Reference numeral 34 denotes a relief valve for setting the relief pressure of the pressure oil supplied to the hydraulic motors 20 and 21, respectively.

Reference numerals 35 and 36 denote control valves 27 and 2
8 is a dial provided as an operating means for generating a signal proportional to the angle at which the dials 35, 36 are rotated right or left from the center zero point. 3
Reference numerals 7 and 38 denote controllers that generate proportional solenoid valves 29, 30 or 31, 32 corresponding to signals from the dials 35, 36, respectively, and a solenoid drive current proportional to the amount of operation of the dials 35, 36 to the right or left. It is.

The capacity of the rear hydraulic motor 21 is, for example, 2
00 cc and the capacity of the front hydraulic motor 20 is set to be larger than that, for example, 300 cc so that the front hydraulic motor 20 can obtain higher torque.

The relief pressure of the rear hydraulic motor 21 set by the relief valve 34 is, for example, 20.6M.
Pa, and the relief pressure of the front hydraulic motor 20 set by the relief valve 33 is higher than that, for example, 29.4M.
Pa is set so that the front hydraulic motor 20 can obtain higher torque.

Further, in the present embodiment,
As described above, the front set A is reduced by reducing the number of debris rods 15 driven by the front hydraulic motor 20 (10) to less than the number of debris rods 15 driven by the rear hydraulic motor 21 (23). It is configured such that a higher torque can be obtained for the rubble rod 15 of the rear group B and C for the rubble rod 15 of the rear group.

As described above, at least one of the capacity of the front hydraulic motor 20 and the relief pressure is adjusted by the rear hydraulic motor 21.
By increasing or decreasing the number of debris rods 15 driven by the front hydraulic motor 20, or by reducing the number of debris rods 15 driven by the rear hydraulic motor 21. A
Of the hydraulic power units 13a and 13b is effectively used, and the gravel rod 15 is driven without stopping.

As shown in FIGS. 4 and 6, the frame 1
An auxiliary transport device (feeder) 40 is attached to the upper part of the device 4. The auxiliary transport device 40 includes a driving rotator 42 such as a driving sprocket or roller on the left and right that is rotated by a motor 41, and a driven rotator 43 such as a driven sprocket or roller on the front and left. And a rubber plate 45, which is a member for feeding gravel, attached to the endless rotating band 44.

In FIG. 4, reference numeral 47 denotes a debris transfer device 5 for loosening excavated soil when the soil has a high viscosity.
It is a scraping device to send to the top. Transport device 4 of the present embodiment
Reference numeral 7 denotes a vertically moving frame 49, a rotary blade 50 for scraping attached to a front portion of the vertical frame 49, a rotating blade 51 for scraping earth and sand attached to a rear portion of the vertical frame 49, and A driving device including a hydraulic motor 52 for rotating the blades 50 and 51, sprockets 53, 54 and 55, and chains 56 and 57, and a frame 14 for adjusting the vertical position of the vertical frame 49.
Hydraulic cylinder 59 and X-shaped link 60 mounted on
Consists of

The excavating portion 5a is attached to the front portion of the frame 14 so as to be rotatable around a pin 61.
And a bracket 62 on the lower surface of the frame 14, are connected by a pin 63, a cushioning rubber 64, a hydraulic exciter 65, a rod 66, and a pin 67. , The excavating portion 5a moves back and forth.

4 and 5, reference numerals 69 and 70 denote proximity switches mounted on the frame 14 as rotation speed detectors of the debris rods 15 of the front set A, the rear set B, and C, respectively.
FIG. 9A is a diagram showing the arrangement of the proximity switches 69 (70). The proximity switch 69 (70) is disposed so as to face the middle of the rotation locus of the magnetic body 71 attached to the end of the shaft 16 of the degraving rod 15.

As shown in FIG. 9B, a display means for calculating and displaying the rotation speed of the debris rod 15 from the output signals of the proximity switches 69 and 70 at a position visible by the operator of the cab 8. 72 and 73 are provided. These display means 72, 73 may be individual digital or analog displays, and proximity switches 69, 7
The display may be switched and displayed on a single display means common to the display units 0, or may be displayed simultaneously or switched on a display or the like.

In this degraving machine, in the cab 8,
The operator shrinks the hydraulic cylinder 7 and lowers the debris transport device, drives the traveling motor of the traveling body 1 to travel the degraving machine, and operates the hydraulic motors 20, 21 and 4 of the debris transport device 5.
While operating the first conveyor 52 and the second conveyor 11 while operating the first and second exciters 65 and the first conveyor 9 and the second conveyor 11, as shown in FIG. Excavation and debris are performed while the excavation portion 5a is vibrated by the vibration exciter 65 by the driving force. The rubble is removed by dropping the earth and sand from between the rubble rods 15 and sending only the rubble backwards with the pins 17.

In such degraving work, the speed of the front hydraulic motor 20 and the rear hydraulic motor 21 is adjusted by adjusting the operation amounts of the dials 35 and 36 shown in FIG. The rotation speeds of the rubble rods 15 of the front set A and the rubble rods 15 of the rear sets B and C are displayed by the display means 72 and 73 so that suitable gravels can be performed while observing the state of the gravelly work. Work while monitoring the contents. Then, the positions of the dials 35 and 36 are fixed at the optimum rotation speed.
If a suitable rotational speed on the same soil has been previously determined and recorded, the operation of the dials 35 and 36 is performed according to the recorded value.

As described above, by detecting the rotation speed of the rubble rod 15 of the rubble transfer device 5 and operating at a suitable rotation speed, the rubble work can be performed efficiently. Further, even if the operator changes, by operating while maintaining the pre-recorded rotation speed of the debris rod, efficient debris work can be performed without requiring skill.

Also, as in the present embodiment, the group of rubble rods is divided into a front group and a rear group, and the individual velocities of the rubble rods in each group are detected and rotated at a suitable speed. In addition, the efficiency of debris removal can be further increased.

Further, as in the present embodiment, the front hydraulic motor has a larger capacity than the rear hydraulic motor, the relief pressure of the front hydraulic motor is higher than the relief pressure of the rear hydraulic motor, By setting the number of debris rods driven by the hydraulic motor to be smaller than the number of debris rods driven by the rear hydraulic motor, each set of debris rods is driven with a suitable torque and rotation.

When the present invention is carried out,
As disclosed in Japanese Patent Publication No. 0-184802, the rubble transfer device 5 has a structure that can be bent between the front set A and the rear sets B and C, or has a large number of square holes and projections on the outer periphery. A rubble rod having another structure, such as a rubble rod formed by fitting a gravitational plate to a square shaft, may be used.

[0046]

According to the first aspect, the rotation speed detector and the rotation speed display means are provided so that the rotation speed of the debris rod can be recognized in the cab, so that the speed specific to the target soil is stored. In addition, the operator controls the rotation speed of the hydraulic motor of the debris transfer device so that the speed is maintained, so that the debris work can be performed efficiently. Further, even if the operator changes, by operating while maintaining the pre-recorded rotation speed of the debris rod, efficient debris work can be performed without requiring skill.

According to the second aspect, the group of debris rods is divided into a front group and a rear group, and a rotation speed detector and a display means for each group of debris rods are provided. The gravel rods can each be rotated at a suitable speed.

According to the third to fifth aspects, each set of debris rods is driven at a suitable torque and rotational speed, respectively.

[Brief description of the drawings]

FIG. 1 is a side view showing an embodiment of a degraving machine according to the present invention.

FIG. 2 is a plan view of FIG.

FIG. 3 is a front view of a main body of FIG. 1;

FIG. 4 is a side view of the debris transfer device of the present embodiment.

5 is a plan view showing a rubble rod arrangement section of the rubble transport device of FIG. 4;

FIG. 6 is a cross-sectional view of the debris transfer device of FIG.

FIG. 7 is a side view showing an interlocking device of a debris rod of the debris transfer device of FIG. 4;

FIG. 8 is a hydraulic circuit diagram of a hydraulic motor for driving a debris rod according to the present embodiment.

FIG. 9A is a perspective view showing a configuration example of a rotation speed detector of a debris rod in the present invention, and FIG. 9B is a block diagram showing a configuration of a display device thereof.

[Explanation of symbols]

1: running body, 1a: track frame, 1b: crawler, 2: pin, 3: hydraulic cylinder, 4: body frame,
5: Debris transfer device, 5a: Drilling section, 6: Pin, 7: Hydraulic cylinder, 8: Operator cab, 9: First conveyor, 10: Swivel device, 11: Second conveyor, 12: Hydraulic cylinder,
13a, 13b: hydraulic power unit, 14: frame, 15: debris rod, 16: shaft, 17: pin,
18: gear, 19: relay gear, 20: front hydraulic motor,
21: rear hydraulic motor, 22: side plate, 23, 24: main hydraulic pump, 25, 26: pilot hydraulic pump, 27,
28: control valve, 29 to 32: proportional solenoid valve,
33, 34: relief valve, 35, 36 dial, 37,
38: controller, 40: auxiliary transport device, 41: hydraulic motor, 42: drive rotating body, 43: driven rotating body, 44:
Infinite rotating belt, 45: rubber plate, 47: scraping device, 49:
Vertical moving frame, 50: rotary blade for scraping, 51: rotary blade for scraping earth and sand, 52: hydraulic motor, 53 to 55:
Sprockets, 56, 57: chain, 59: hydraulic cylinder, 60: X-link, 61: pin, 62: bracket, 63: pin, 64: cushioning rubber, 65: hydraulic exciter, 66: rod, 67 : Pin, 69, 70: proximity switch (rotation speed detector), 71: magnetic substance, 72, 73:
Display means

Continuing from the front page (72) Inventor Koichi Otsuka 650, Kandachi-cho, Tsuchiura-shi, Ibaraki Hitachi Construction Machinery Co., Ltd. Tsuchiura Plant (72) Inventor Noriaki Yokoyama 2-5, Nishi 24-Jo Kita, Obihiro City, Hokkaido Loader Stock F term in the company (reference) 2B034 AA06 BA07 BB02 BC06 BD02 BG01 BG07

Claims (5)

[Claims] A self-propelled vehicle is provided with a debris transfer device having a digging portion at a front end thereof, the debris transfer device having a large number of interlocking and rotating debris rods arranged on a frame in a front-rear direction. In addition to being provided with a rotation speed detector of the debris rod, the operator's cab of the debris machine is provided with display means for displaying the rotation speed of the debris rod detected by the rotation speed detector. And debris machine. 2. The degraving machine according to claim 1, wherein said debris rod is divided into a front set and a rear set of debris rods, and a front set and a rear set of debris are set. A front hydraulic motor and a rear hydraulic motor for driving each set of debris rods corresponding to the rods, and the rotational speed detector is provided for each of the front set and the rear set of debris rods. Debris machine. 3. The degraving machine according to claim 1, wherein a hydraulic motor having a larger capacity than a rear hydraulic motor is used as said front hydraulic motor. 4. A degraving machine according to claim 1, wherein a relief pressure of said front hydraulic motor is higher than a relief pressure of said rear hydraulic motor. 5. The gravel machine according to claim 1, wherein the number of the gravel rods driven by the front hydraulic motor is smaller than the number of the gravel rods driven by the rear hydraulic motor. Debris machine characterized by the following.