JPH10317421A - Caterpillar loader provided with upper slewing body of hydraulic shovel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce labors and costs, by efficiently carrying out site preparation works, excavation works, and loading works by one construction machine. SOLUTION: The upper slewing body 4 of a hydraulic shovel provided with attachments 6 used for excavation and haulage in common is arranged on the rear frame base 2a of the lower traveling body 2 in this caterpillar loader 1. Such a structure that the upper slewing body 4 automatically stops slewing at the slewed position where the cab 5 of the upper slewing body 4 turns forward, is provided. In this way, the operation of a loader bucket 3 to execute a loading work and the operation of excavating and hauling works by use of attachments for excavation and haulage can be executed by the operating instruments in the cab 5. And a site preparation work can be executed by equipping an assembling type soil-removal plate 37 on the loader bucket to enable an site preparation work and further, an excavation work and a loading work can be executed immediately after the site preparation work.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a machine equipped with a special device for a working traveling machine such as a crawler type loader.

[0002]

2. Description of the Related Art In a conventional crawler-type loader, a loading operation can be performed, but an excavating operation and a leveling operation need to be performed by another construction machine such as a hydraulic shovel.

[0003]

However, in the conventional crawler-type loader, the loading operation by the loader bucket provided on the lower traveling body can be performed efficiently, but the excavation work is difficult. In many cases, the construction range of the crawler-type loader is narrowed. Therefore, it is an object of the present invention to provide a crawler-type loader having excavation performance equivalent to that of a hydraulic excavator and capable of leveling work. Was.

[0004]

SUMMARY OF THE INVENTION The present invention relates to a crawler-type loader in which hydraulic equipment such as an engine, a power transmission device, a hydraulic pump, and working equipment such as a bucket are mounted on a lower traveling body. By disposing the upper revolving structure of a hydraulic shovel equipped with a revolving mechanism on a mount provided at the rear of the driver's seat, excavation work in addition to loading work by a loader bucket can be performed more efficiently by the upper revolving structure. Can be done. In this apparatus, the working device such as a loader bucket is disposed on the front side of the lower traveling structure, and the upper revolving unit is disposed on the rear side of the lower traveling structure. The hour loader bucket can have a reaction force. Then, the operation of the upper revolving unit and the operation of the crawler-type loader are enabled by the operating tool in the cab arranged on the upper revolving unit. Has a mechanism to automatically stop turning,
In addition, since it has a mechanism for fixing the swing, it can be easily operated as a crawler type loader, and can be used as a hydraulic shovel by releasing the mechanism for fixing the swing. By doing in this way, conventionally, civil works that need to be performed using two types of machines, a crawler-type rogue and a hydraulic excavator, can be performed with one crawler-type loader of the present invention. Can reduce costs.

[0005]

Next, an embodiment of the present invention will be described with reference to the drawings. In FIG. 1, a crawler-type lower traveling body 2 constituting a crawler-type loader 1 is provided with a rear gantry 2a, and the lower traveling body has hydraulic equipment such as a power transmission device and a hydraulic valve. Also, a loader bucket 3 and the like are provided, and an upper swing body 4 of a hydraulic shovel is provided on the gantry 2a with a swing mechanism.

The upper revolving superstructure 4 is disposed on the rear gantry 2a provided at a position where the driver's seat of the conventional crawler type loader shown in FIG. 2 is located, and a cab 5, an engine,
A drive device such as a hydraulic pump, various tanks such as a fuel tank and a hydraulic oil tank, various hydraulic devices (both not shown), and the like are provided, and an excavation / transportation attachment 6 is attached. The excavation / transportation attachment 6
A boom 7 whose base end is instructed by the upper revolving unit 3 to be able to move up and down, an arm 8 supported by the tip of the boom 7 so as to swing back and forth, and a swingable support by the tip of the arm 8 And other components such as a bucket 9. Furthermore, when the upper revolving unit 4 is turned forward, the upper revolving unit 4 and the excavation / transportation attachment 6 are dimensioned so as not to interfere with the devices arranged on the lower traveling unit 2 of the crawler-type loader 1. Is set. In addition, a mechanism is provided to automatically stop the upper revolving unit 4 from turning when the cab 5 is turned forward, so that the crawler-type loader 1 can be operated by operating tools in the cab 5.

On the other hand, in the case of the embodiment of FIG. 3 in which the excavating and carrying attachment 6 is attached to the upper revolving unit 4, the loading operation by the loader bucket 3 is performed immediately after the excavation operation is completed. The upper revolving unit 4 can be mounted with various attachments of a hydraulic excavator, and the loading of debris on a carrier such as a truck can be performed more efficiently than the upper revolving unit of the excavator. is there.

In the embodiment of the present invention, the hydraulic source of the crawler-type loader 1 uses the hydraulic source 10 on the upper revolving unit 4 shown in FIG. 3, and as shown in the hydraulic circuit diagram of FIG. 4
The hydraulic cylinders 13 and 14 for the loader bucket 3 can be expanded and contracted by operating the switching valve 12 on the upper revolving unit 4 via a swivel joint device 11 disposed at the center of rotation of the lower revolving unit. Supply of hydraulic oil to the traveling motor 50 disposed on the traveling body 2 is also performed via the swivel joint device 11.

The operation of the crawler-type loader 1 such as the operation of the hydraulic cylinders 13 and 14 of the loader bucket 3 and the switching of hydraulic oil supply to the traveling motor 50 is performed by the cab 5.
A control valve (not shown) for supplying and stopping the hydraulic oil based on the operation of the operation tool is provided in the upper revolving unit 4. Is done.
On the other hand, unlike the present embodiment, even when a mechanical system is adopted for the traveling mechanism, the supply of hydraulic oil from the hydraulic oil tank of the upper revolving unit 4 to the hydraulic cylinders 13 and 14 is performed by the upper revolving unit 4.
The operation is performed through a swivel joint device 11 provided between the vehicle and the lower traveling body 5, and the number of oil passages is increased or decreased in accordance with an increase or decrease in the number of devices that supply hydraulic oil.

Further, the swivel joint device 11
Is a shaft 1 fixed to the lower traveling body 2 as shown in FIG.
9 and a body 20 that is locked to the upper revolving unit 4 and fits into the shaft portion 19.
The supply of high-pressure oil to the rotation motor 22 is automatically stopped by the groove shape of the shaft portion 19 and the body
Automatic stop is possible depending on the positional relationship of the oil passages.

As described above, when the operation of the crawler-type loader 1 is performed by the operating tool in the cab 5, the turning function is automatically stopped at the turning position where the cab 5 faces forward, and the operation of the loader bucket 3 is performed. It has a mechanism that makes it easy to operate as the expression loader 1. In addition, when it is used as the upper revolving unit 4 of a hydraulic shovel, it has a configuration in which the automatic rotation stop mechanism can be released and used. The operation can be performed by the operation tool in the cab 5.

First, regarding a mechanism for automatically stopping the turning,
The description will be made based on FIGS. 5, 6, 7, and 8. FIG. 5 shows a swivel joint device 2 of a hydraulic shovel having a discharge plate.
1, FIG. 6, FIG. 7, and FIG. 8 show a swivel joint device 11 of the present invention. FIG. 5 and FIG.
5, oil paths 23a, 23b and 24a and 24b for supplying hydraulic oil to the right traveling motor and oil paths 25a, 25b and 26a for supplying hydraulic oil to the left traveling motor in FIG.
On the other hand, the swivel joint device 11 of the crawler-type loader 1 of the present invention, which has a hydraulic traveling mechanism and hydraulic motors on the left and right, has a right traveling motor 50a and a left traveling motor 5
Oil passages 23a and 23b for supplying hydraulic oil
a, 24b and oil passages 25a, 25b and oil passages 26a, 2
6b. Further, oil passages 27a and 27b for supplying hydraulic oil to the hydraulic cylinders 13 and 14 for the loader bucket.
Oil passages 28a, 28b, oil passages 29a, 29b, and oil passages 30a, 30b, and supply hydraulic oil to the hydraulic cylinder 16 for the earth discharging plate 15 in FIG. It is designed to supply a larger volume of hydraulic oil than that of.

Further, the swivel joint device 11 of the present invention has a mechanism capable of restricting a turning range of the upper turning body 4. Revolving range of body 4 from 2 degrees to 358
The swivel joint device 11
4 and 9 showing the hydraulic circuits around and 21 will be described with reference to FIGS. 6, 7 and 8 described above. As shown in FIGS. 4 and 9, in the swivel joint device 11 of the present invention, the hydraulic oil to the turning motor 22 that includes the oil passages 31 a and 31 b and the oil passages 32 a and 32 b and turns the upper swing body 4 to the right is: Oil passages 31a, 31b and oil passages 32b, 32a
To return to the hydraulic pressure source 10. At that time, when the upper swing body 4 comes within a range of 2 degrees to 0 degrees with respect to the lower running body 3, the body 20 rotates with respect to the shaft portion 19 fixed to the lower running body 3, and as shown in FIG. Part 1
Since the oil passage 31a of the body 20 comes to the position where the groove 9 is interrupted, the high-pressure oil is not supplied to the oil passage 31b, the turning of the upper revolving unit 4 ends, and the turning position where the cab 5 faces forward. To automatically stop turning. When turning in the direction of the loader bucket 3, in the state of the excavation / transportation attachment 6 shown in FIG. 1, dimensions are set so as not to interfere with each device disposed on the lower traveling body 2 of the crawler-type loader 1. Is set. Next, in the case of performing an operation of turning right in the state of the excavation / transportation attachment 6 as shown in FIG.
Since the oil passage 31a is closed, the high-pressure oil is not supplied to the turning motor 22 but is supplied to the turning motor 22 through the oil passages 32a and 32b only when an operation of turning left is performed. After the turning motor 22 is rotated in a direction to turn the upper turning body 4 to the left, the hydraulic oil having reduced pressure is supplied to the oil passage 3.
1b and 31a and return to the hydraulic pressure source 10.

Conversely, when turning left in the state of the boom 7, the arm 8, and the bucket 9 in FIG. 1, high-pressure hydraulic oil is supplied to the upper revolving unit 4 by the turning motor 22 via oil passages 32a and 32b. After rotating in the left-turning direction, the low-pressure hydraulic oil returns to the hydraulic power source 10 via the oil passages 31b and 31a. At that time, when the upper swing body 4 comes within a range of 358 degrees to 360 degrees with respect to the lower running body 3, the body 20 rotates with respect to the shaft portion 19 fixed to the lower running body 3, and as shown in FIG. Since the oil passage 32a of the body 20 comes to the position where the groove of the part 19 is interrupted, high-pressure oil is not supplied to the oil passage 32b, and the turning of the upper revolving unit 4 is completed and the cab 5 turns forward. Automatically stops turning at the position. Next, when the left turn operation is performed in the state of the boom 7, the arm 8, and the bucket 9 in FIG. 1, the high-pressure oil is not supplied to the turn motor 22 because the oil passage 32a is blocked. The high pressure oil is 31a only when the operation of turning right is performed.
After passing through 31b to the turning motor 22 and rotating the turning motor 22 in a direction to turn the upper turning body 4 to the left, the hydraulic oil having reduced pressure is supplied to the hydraulic source 10 via the oil passages 32b and 32a. Will return to.

As described above, the swivel joint device 1 provided at the center of rotation of the upper rotating body 4 of the present invention.
1 is a turning motor 22 for turning the upper turning body 4 according to the positional relationship between the groove shape of the shaft portion 19 and the oil passage of the body 20.
Supply of high-pressure oil to the upper revolving unit 4 can be automatically stopped, and the swivel joint device 1 of FIG. 6 can be automatically stopped.
It is also possible to provide a through hole in the center of 1,
In this embodiment, the configuration is such that no through hole is provided. When it is necessary to send and receive electric signals between the upper revolving unit 4 and the lower traveling unit 2 by wire, the swivel joint device 1 is used.
It is effective to provide a hole (not shown) that penetrates vertically in the center of the device 1.

Next, a mechanism for fixing the turning of the upper revolving unit 4 at the turning position where the cab 5 of the upper revolving unit 4 faces forward will be described with reference to FIG. As shown in the figure, a long hole corresponding to a turning range of -2 to +2 degrees with the front being 0 degrees is provided.
A pedestal 36 having a female screw is welded to the rear base 2a. Therefore, the swing of the upper swing body 4 is -2.
When the vehicle automatically stops within a range of +2 degrees to
A fixing pin 38 having a male screw corresponding to the female screw of the above can be fastened to the pedestal 36 through an elongated hole. Since the rubber plate 35 having an appropriate elasticity is fixed to the lower surface of the floor surface 34, the turning can be fixed by the frictional force between the pedestal 36 and the rubber plate 35 generated by the fastening force of the fixing pin 38.

Therefore, when working with the loader bucket 3 or the like, the fixing pin 38 is fastened to the pedestal 36 and operated. However, when working as the upper revolving unit 4 of the hydraulic excavator, the fixing pin 38 is operated. Remove 38 and operate.
In addition, in connection with the structure of the gantry 2a of the lower traveling body 2 in which the upper revolving superstructure 4 is disposed, as a welded structure of the lower traveling body,
If a structure similar to the structure of the long undercarriage of a hydraulic shovel having a length dimension longer than a standard undercarriage with respect to the width dimension is employed, the front-rear balance of the body can be obtained.

In the crawler-type loader having the upper revolving structure of the hydraulic shovel according to the present invention, the operation as the crawler-type loader 1 such as the operation of the loader bucket 3 is performed by the upper revolving structure of the hydraulic shovel. The loading operation can be performed immediately after the excavation operation by using the operation tool in the cab 5 in addition to the operation in Step 4.

[0019]

Therefore, the track type loader of the present invention is
Not only loading work as a conventional track type loader,
With the upper revolving structure of the hydraulic excavator, it is possible to perform excavation work such as trench excavation which was conventionally performed by a hydraulic excavator, and the operation tool in the cab of the upper revolving structure is used for loading operation as a crawler type loader. Since both the excavation operation and the excavation operation can be performed, the crawler-type loader 1 having the revolving superstructure of the hydraulic excavator can be used for civil engineering work that requires construction using two types of machines, a crawler-type loader and a hydraulic excavator.
Work can be performed efficiently with a stand, and labor and cost can be reduced.
In addition, the loader bucket 3 is equipped with the prefabricated dumping plate 37 shown in FIG.
If the construction is done with bolts 39 and nuts 40, the leveling work can be performed more efficiently. Especially in narrow construction sites such as underground tunnel excavation work, excavation work and loading work immediately after leveling work with one construction machine It is possible to work with high efficiency.

[Brief description of the drawings]

FIG. 1 is a side view of a crawler-type loader provided with an upper swing body of a hydraulic shovel of the present invention.

FIG. 2 is a side view of a gantry at a rear portion of a lower traveling body on which an upper revolving structure of the present invention is disposed.

FIG. 3 is a side view of an excavation operation performed by a crawler-type loader provided with the upper-part turning body of the present invention.

FIG. 4 is a hydraulic circuit diagram relating to the swivel joint device and the swing motor according to the embodiment of the present invention.

FIG. 5 is a longitudinal sectional view of a swivel joint device according to an embodiment of the present invention.

FIG. 6 is a longitudinal sectional view of the swivel joint device according to the embodiment of the present invention.

FIG. 7 is a sectional view of an upper oil passage of the swivel joint device according to the embodiment of the present invention.

FIG. 8 is a sectional view of the upper oil passage of the swivel joint device according to the embodiment of the present invention.

FIG. 9 is a hydraulic circuit diagram of the swivel joint device according to the embodiment of the present invention.

FIG. 10 is a vertical cross-sectional view illustrating a turning fixing mechanism of the upper excavator of the hydraulic excavator according to the present invention.

FIG. 11 is a perspective view of the knockdown plate of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Crawler type loader 2 Undercarriage 2a Stand 3 Loader bucket 4 Upper revolving superstructure 5 Cab 6 Excavation and transportation attachment 7 Boom 8 Arm 9 Bucket 10 Hydraulic power source 11 Swivel joint device 12 Switching valve 13 Hydraulic cylinder 14 Hydraulic cylinder 15 Discharge plate 16 Hydraulic cylinder 17 Safety valve 18 Hydraulic pump 19 Shaft 20 Body 21 Swivel joint device 22 Swing motor 23a Oil passage 23b Oil passage 24a Oil passage 24b Oil passage 25a Oil passage 25b Oil passage 26a Oil passage 26b Oil passage 27a Oil passage 27b Oil passage 28a oil passage 28b oil passage 29a oil passage 29b oil passage 30a oil passage 30b oil passage 31a oil passage 31b oil passage 32a oil passage 32b oil passage 33 seal 34 floor plate 35 rubber plate 36 pedestal 37 assembly-type discharging plate 38 fixing pin 39 bolt 40 nuts 5 Traveling motor 50a right travel motor 50b left travel motor

Claims (3)

[Claims] An engine, a power transmission device,
In a crawler-type loader to which a driver's seat, hydraulic equipment, and working equipment such as a loader bucket are attached, an engine, a power transmission device, a hydraulic pump, an upper part of a hydraulic shovel instead of a driver's seat, etc. A crawler-type loader characterized in that a revolving body is disposed and a ground leveling operation can be performed with an assembling type earth removal plate mounted on a loader bucket, so that leveling, excavation, and loading operations can be performed efficiently. 2. The crawler-type loader according to claim 1, further comprising a mechanism for automatically stopping the turning when the cab of the upper turning body is turned forward. 3. The shaft according to claim 1, further comprising a shaft fixed to the lower traveling structure, and a body locked to the upper revolving structure and rotatably fitted to the shaft. A swivel joint device comprising a mechanism for automatically stopping the supply of high-pressure oil to the swing motor in order to automatically stop the swing of the upper swing body according to the positional relationship between the groove shape and the oil passage of the body.