JPH11148145A - Hydraulic excavator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hydraulic excavator, by which a specified range extending over the horizontal direction from the center plane of the hydraulic excavator is excavated without slewing a revolving superstructure and the excavated materials are received by a belt conveyor, in which the directions towards the left and the right and upper and lower sections, height, etc., can be adjusted and set, and can be forwarded in by a transport means in convenient height and place. SOLUTION: A belt conveyor C is installed to the upper revolving superstructure B of a hydraulic excavator with an offset boom D'a so that excavated materials by the hydraulic excavator can be received while a rotary means K rotating the belt conveyor C in the horizontal direction and the first lifting- lowering means Ha and second lifting-lowering means Hb of the belt conveyor C mounted at a regular interval in the forwarding direction of freight in the belt conveyor C are set up. The hydraulic excavator is formed in constitution, in which both or either one of the inclination and height of the belt conveyor C can be changed by the cooperation of the first lifting-lowering means Ha and the second lifting-lowering means Hb at that time.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hydraulic excavator capable of feeding excavated materials such as earth and sand from a digging side to a carry-out side by a belt conveyor without turning an upper slewing body. .

[0002]

2. Description of the Related Art When excavating a target ground using a hydraulic excavator used for excavating the ground, for example, a hydraulic excavator having a backhoe attachment, excavating and scooping earth and sand in the bucket while pulling the hoe bucket toward the user. While raising, the upper revolving structure is swung to load the earth and sand in the bucket into a dump truck or the like.

[0003] However, in the case of excavation using this type of hydraulic excavator, when there is a restriction in a work space for excavation work, for example, a narrow road having a fence or the like on both sides or a swivel space of a revolving superstructure is required. It was difficult to excavate the ground to be excavated where trees and various structures exist.

[0004]

In view of the above, a belt conveyor is provided in the front-rear direction of the lower traveling body of the hydraulic shovel, and an upper revolving body is provided so as to straddle the belt conveyor. A hydraulic excavator that loads excavated earth and sand on the belt conveyor with a backhoe attachment configured to bend and extend only in the vertical direction and transfer the excavated earth and sand to a dump truck or the like waiting on the rear side has been studied.

However, in such a hydraulic shovel, since the belt conveyor is provided between the lower traveling structure and the upper revolving structure, the installation position of the upper revolving structure is raised, and the center of gravity of the excavator is increased. And the structure of the revolving portion of the upper revolving structure becomes complicated.

In view of the above, a belt conveyor is provided on an upper revolving structure of a hydraulic excavator having a backhoe attachment configured to bend and elongate only in the vertical direction. A hydraulic excavator that loads excavated earth and sand with a backhoe attachment that only bends and stretches to a dump truck, etc., that is standing by on the rear side was studied.

In such a hydraulic excavator, since the backhoe attachment is configured to bend and extend only in the vertical direction, earth and sand excavated and scooped up in a bucket by the backhoe attachment are loaded on a built-in belt conveyor. In this case, excavate and scoop this earth and sand, lift it up,
Each time, the tail side of the belt conveyor (the side that receives excavated earth and sand on the belt conveyor)
The belt conveyor is swiveled so as to position, and excavation in this bucket, receiving earth and sand, etc., and the tail side of the belt conveyor that has received the earth and sand is again turned outside the operating position of the backhoe attachment, or Excavating and scooping up this soil, etc., lift the receiving plate of the hopper attached to the belt conveyor below the bucket that is waiting to be lifted upward and stand by one by one. The receiving plate is closed again outside the operating position of the backhoe attachment and waited, or alternatively, the bucket of the backhoe attachment configured to bend and extend only in the vertical direction is positioned in front of the provided belt conveyor. Make up and lift this bucket up While pulling on the front side, it was necessary to make the loading of the excavating earth and sand into the tail side of the belt conveyor of this equipped.

However, a backhoe attachment that is configured to bend and extend only in the up-down direction is provided, and the backhoe attachment is used to move downward from the side of a bucket that is waiting for excavation and scooping of earth and sand to stand under the bucket. The belt conveyor is configured with respect to the upper revolving unit so that the tail side of the belt conveyor is swiveled and the tail side of the belt conveyor that has received the earth and sand is again turned outside the operating position of the backhoe attachment. In the above-described method, the belt conveyor must be turned every time excavation is performed by the backhoe attachment, and the configuration and the operation system are complicated, and the apparatus is expensive.

A backhoe attachment configured to bend and extend only in the up-down direction is provided. The backhoe attachment is used to excavate earth and sand and scoop up the bucket, and to place the bucket from the side of the movement trajectory of the bucket. Each time, the receiving plate of the hopper is spread out, and the excavated material in the bucket is received by the receiving plate, and the excavated object is placed on the belt conveyor provided on the upper revolving unit on the side of the movement trajectory of the bucket. In the above method, it is necessary to open and close the receiving plate of the hopper every time excavation is performed by the backhoe attachment, and the configuration and the operation system are complicated, and the apparatus is expensive.

[0010] Further, a belt conveyor is provided on the upper revolving structure so as to be positioned on the line of retraction of the bucket in the backhoe attachment configured to bend and elongate only in the vertical direction, and excavating and scooping up while pulling the bucket of the backhoe attachment forward. Sand and dirt,
In the above method of placing on the tail side of the belt conveyor provided in the upper revolving structure, there is a disadvantage that excavation by the bucket is limited to only the front ground on the same line as the provided belt conveyor, Since it is necessary to provide a belt conveyor on the trajectory line of the bending / extending operation in such a backhoe attachment, there have been recognized inconveniences that the design of the device has many restrictions.

From this point, a belt conveyor is fixedly mounted on the upper revolving structure of the hydraulic excavator having the offset boom, and excavation is performed by the backhoe attachment having the offset boom by the belt conveyor fixed to the upper revolving structure. It was considered that the objects should be sent to a vehicle such as a dump truck waiting behind the excavator.

However, in such a method, since the belt conveyor is fixedly provided with respect to the upper swing body of the hydraulic excavator, the tail side of the belt conveyor, The head side (the side where the excavated earth and sand is unloaded from the belt conveyor to the dump truck or the like on the belt conveyor) cannot be positioned at a convenient height, and the belt conveyor is located at the actual work site. Various obstacles hinder its use, or make it difficult to load excavated materials efficiently using a backhoe attachment, etc., or load excavated materials conveniently into concrete transportation means such as dump trucks. It has been found to cause unavoidable disadvantages.

Further, in such a method, since the belt conveyor is fixed to the upper revolving unit of the hydraulic excavator, the tail side of the belt conveyor is backhoeed in accordance with the actual excavation site. There is a disadvantage that it is difficult to position the excavated material efficiently at the loading position of the excavated material by the attachment, etc., and the head side of the belt conveyor is moved so that the excavated material can be sent to a convenient position for a transportation means such as a dump truck. An inconvenience that was difficult to position was recognized.

Further, in this method, since the belt conveyor is fixedly provided to the upper swing body of the hydraulic shovel, it is difficult to feed or store the hydraulic shovel having the belt conveyor. Was done.

According to the present invention, the direction of excavation can be arbitrarily selected depending on the pivoting position of the upper revolving unit, and the center of the hydraulic excavator can be used without rotating the upper revolving unit during excavation and loading of excavated materials into a dump truck or the like. A predetermined range extending from the surface to the left and right direction can be excavated in parallel with the center plane of this excavator, and the mounting direction or height of the belt conveyor equipped with the excavator in the left and right direction and up and down direction is adjusted. It is an object of the present invention to provide a hydraulic shovel that can be reliably and smoothly loaded on the belt conveyor by being set, and can be fed to a transportation means such as a dump truck at a convenient height and position. .

[0016]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the present invention provides a hydraulic shovel which is mounted on an upper revolving structure of a hydraulic shovel provided with an offset boom so as to be able to receive excavated material from the hydraulic shovel. A rotating means for rotating the belt conveyor in the left-right direction and a first elevating means for the belt conveyor provided at a predetermined distance in the direction of transporting the load on the belt conveyor; And a second elevating means, wherein the inclination and / or height of the belt conveyor can be changed by cooperation of the first elevating means and the second elevating means. .

In the hydraulic excavator thus configured, excavation within a predetermined range in front of the hydraulic excavator can be performed without rotating the upper revolving unit, and the working device having the offset boom enables The excavated material by the excavator can be loaded onto a belt conveyor provided on the upper swing body, and can be sent to a transportation means such as a dump truck waiting near the excavator, When loading the excavated material onto the belt conveyor, there is no need to rotate the upper revolving structure, no need to rotate the belt conveyor, and no need to provide a hopper or the like to be opened and closed by the belt conveyor.

In the hydraulic excavator thus configured, the upper revolving unit is swiveled toward the direction of the excavation, so that the offset boom can be moved in any direction different from the traveling direction of the lower traveling unit. Excavating a predetermined area in front of the front attachment provided with the upper revolving unit without rotating the upper revolving unit, and loading the excavated material on a belt conveyor provided on the upper revolving unit, and using the belt conveyor to dump a truck or the like. It can be sent to transportation means and the like.

Further, in the hydraulic excavator having such a configuration, prior to the excavation, a transporting means such as a dump truck is provided in accordance with the situation of each work site.
The head side of the belt conveyor (in this specification, the head side of the belt conveyor means the load such as excavated material transported on the belt conveyor from the belt conveyor to a dump truck or the like so as to be the most convenient position. The excavated material by the working device is securely transported to the dump truck or the like at the set predetermined position with the rotating position of the unloading side to be loaded.) Can be loaded against the means.

Further, in the hydraulic excavator having such a configuration, an efficient excavation of an excavated material by a working device having an offset boom and a belt conveyor of the excavated material can be performed according to the situation of each work site. The tail side of the belt conveyor (in this specification, the tail side of the belt conveyor means a side that receives a load such as an excavated material carried on the belt conveyor) to an efficient loading position for the belt conveyor. With the moving position set and set, the excavated material by the working device can be sent from this rotationally positioned position toward a transporting means such as a dump truck.

Further, in the hydraulic excavator having such a configuration, the tail side of the belt conveyor can be arbitrarily set in the vertical direction according to the situation of each work site or the form of each transport means such as a dump truck. Can be set at height. Similarly, the head side of the belt conveyor can be positioned and set at an arbitrary height in the vertical direction. Further, similarly, the belt conveyor can be positioned and set at an arbitrary height in the vertical direction.

Further, in the hydraulic shovel having such a configuration, when the hydraulic shovel is forwarded by a transportation means or stored in a hangar or the like,
The belt conveyor provided on the upper rotating body can be turned in a horizontal direction so as to be in a form convenient for the forwarding or storing. Similarly, it can be moved up and down. Similarly,
Either one or both of the tail side and the head side of the belt conveyor can be turned up and down.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a hydraulic excavator according to a typical embodiment of the present invention will be described in detail.

FIG. 1 shows a transportation means E such as a dump truck using a hydraulic shovel according to this exemplary embodiment.
2 shows a state in which excavated materials such as earth and sand are loaded using the belt conveyor C when viewed from the side, and FIG. 2 shows this state when viewed from above. Further, in FIG. 3, a state where the offset boom D′ a is operated is indicated by a virtual line, and a state where the belt conveyor C is turned in the lateral direction is virtually illustrated. Shown by lines. FIG. 4 shows the distal end side of the working device D as viewed from above, and also shows the operation state of the offset boom D'a provided in the working device in the left-right direction by virtual lines. FIG. 5 shows a hydraulic shovel according to this embodiment as viewed from the side opposite to FIGS. FIGS. 6 to 8 show the first supporting means F, and FIG.
FIG. 7 is a cross-sectional view of the main part viewed from the front side, and FIG. 7 shows the main part viewed from the side, and FIG. 8 further shows a hydraulic cylinder as a component thereof. 54
It is shown by breaking a part of the portion. FIG. 9-
FIG. 12 shows the second supporting means G, and FIG.
FIG. 10 is a cross-sectional view of a main part in a vertical direction when the main part is viewed from the front side. FIG.
Then, this is viewed from the side, and in FIG. 12, the main part of the hydraulic cylinder 72 is shown in cross section. Further, FIG. 13 shows a state in which the provided belt conveyor C is bent as viewed from the side.

In the hydraulic shovel according to this embodiment, a belt conveyor C is provided on an upper revolving structure B of a hydraulic shovel having an offset boom D'a so as to be able to receive the excavated material by the hydraulic shovel. A rotating means K for rotating the belt conveyor C in the left-right direction; a first lifting / lowering means Ha of the belt conveyor C provided at a predetermined interval in a direction in which the goods are transported on the belt conveyor C; Lifting means Hb, and the inclination and / or height of the belt conveyor can be changed by cooperation of the first lifting means Ha and the second lifting means Hb. .

First, a hydraulic excavator according to this embodiment includes a lower traveling unit A, an upper revolving unit B, a working device D having an attachment D 'having an offset boom D'a, and a belt conveyor C. It is provided for.

Lower traveling body A constituting this hydraulic shovel
May be any as long as it has a traveling function and a function of supporting the upper-part turning body B. Typically,
There are a crawler type, a wheel type, a track type, and the like. In the illustrated example, a crawler type lower traveling body A configured by including a starting frame 12, an idle wheel 13, a crawler belt 14, and the like on a traveling frame 11 is shown. Is shown as an example.

The upper revolving structure B provided on the lower traveling structure A is revolved with respect to the lower traveling structure A by a revolving device including a revolving bearing 15, a revolving hydraulic motor, a speed reducer, a brake, a revolving pinion, and the like. Provided possible.

The upper revolving structure B shown as an upper revolving structure B provided on the lower traveling structure A includes a cab 17, a house 18, a counterweight 19, etc. on a revolving frame 16, and includes a revolving pinion, It is shown as a typical upper revolving structure provided on the lower traveling structure A so as to be able to turn and stop with a brake, a turning parking brake, a turning lock and the like.

Next, the working device D provided on the upper swing body B has a structure including a general equipment and an attachment D 'provided with an offset boom D'a. As a typical example, an attachment D 'including an offset boom D'a, an arm 23, a bucket 24, and the like is shown.

An attachment D 'configured as, for example, a backhoe attachment as the working device D includes a lower boom 20 which can be raised and lowered by a boom cylinder 25 serving as a hydraulic cylinder around a boom foot pin 22 as a rotation center. At the tip side of the lower boom 20, the side, the attachment D ′ in the illustrated example
The upper boom 21 is provided on both left and right sides of the upper boom 21 so as to be pivotable about a pin 28 as a rotation center, and a pin 29 on the distal end side of the upper boom 21 and in a direction parallel to the direction of the pin 28. The arm hinge pin 31 in a horizontal direction is rotated by a bracket 30 rotatably provided around a rotation center and an arm cylinder 26 as a hydraulic cylinder provided in the bracket 30 with respect to the bracket 30. An arm 23 rotatably provided in the up-down direction as a center, a bucket cylinder 27 as a hydraulic cylinder, a bucket link 33, and a guide link at the distal end side of the arm 23, with the bucket hinge pin 32 as the center of rotation. And a bucket 24 rotatably provided in the up-down direction by a nut 34 or the like.

A link receiving portion 35 is provided from the upper portion of the lower boom 20 so as to protrude toward one side of the lower boom 20 so as to be integral with the lower boom 20, and a projecting side of the link receiving portion 35 is provided. A link receiving portion 36 provided on the same side and protruding from the bracket 30 toward the side thereof so as to be integrated with the bracket 30.
In addition, both ends of the offset link 37 are rotatably provided by pins 38 and 39 which are in the same direction as the pins 28 and 29, respectively, and each of the pins 28, 29, 38 and 39 is provided. The line connecting the center lines forms a parallelogram.

The link receiving portion 3 of the lower boom 20
One end of the pin 41 of the cylinder receiving portion 40 provided with an axis center line on the extension of the pin shaft of the fifth pin 38 is rotatably provided, and the other end is provided so as to protrude to the side of the upper boom 21. The upper boom 21 is rotatable with respect to the lower boom 20 by an offset cylinder 44 as a hydraulic cylinder rotatably mounted by a pin 43 of the cylinder receiving portion 42.

In the attachment D 'shown in the figure, an offset boom D'a for moving the arm 23 and the bucket 24 to the right and left parallel to the body center line of the excavator is constituted by the above-described structure. In the attachment D ′ according to the illustrated example, the lower boom 20, the upper boom 21, the cylinder receiving frame 30a of the arm cylinder 26 in the bracket 30, and the arm 23 are the same in plan view. The offset link 37 is provided so as to be positioned on the virtual line xx, and is provided on the side of the virtual line xx and in parallel with the virtual line xx. The pin 28, the pin 29, the pin 38, and the pin 39 form a square, more specifically, a parallelogram in a substantially right-angled quadrilateral state.

In the attachment D 'having such a structure, the tip end of the upper boom 21 positioned on the imaginary line xx is turned by the offset cylinder 44 in the left-right direction. Arm 2
3 and the bucket 24 are configured to move in parallel to the virtual line xx.

In the working device D having such a configuration,
An excavation target such as earth and sand excavated by the boom cylinder 25, the arm cylinder 26, the bucket cylinder 27, and the like can be loaded on the belt conveyor C by operating the offset cylinder 44, the bucket cylinder 27, and the like.

The belt conveyor C is moved to the upper rotating body so that the belt conveyor C can be positioned at a position where excavated materials such as earth and sand can be received by the working device D having the offset boom D'a configured as described above. B.

The belt conveyor C provided on the upper rotating body B is provided with a tail side Ca of the belt conveyor C on which the object to be excavated can be placed at a position where it can conveniently receive earth and sand excavated by the working device D. In addition to positioning, the excavated object is mainly provided forward and backward of the upper revolving unit B so that the excavated object can be sent to the head side Cb of the belt conveyor C provided on the side opposite to the excavation side by the working device D. is there. That is, the belt conveyor C
And the head side Cb of the belt conveyor C is located on the side opposite to the working space of the working device D, and the tail side Ca of the working device D such as a backhoe attachment The ascending belt 48a of the belt conveyor C is provided so as to transport the excavated material in the direction of the arrow Y so that the excavated material can be loaded on a transporting means E such as a dump truck waiting for transporting the excavated material by the device D. It is.

Various types of belt conveyors can be used as the belt conveyor C provided in the upper revolving structure B of the hydraulic shovel according to this embodiment. In the illustrated example, a tail portion of the belt conveyor C is used. The side Ca protrudes forward from the upper rotating body B, and further, the head side Cb of the belt conveyor C is bent in a substantially horizontal direction. The unloading position of C is provided in a sufficiently protruding state so as to be a convenient position with respect to the transportation means E such as a dump truck, and in particular, the illustrated example is a trough type belt. Shown as conveyor C.

Here, the belt conveyor C provided on the upper rotating body B has a conveyor belt 48 provided endlessly between a pulley 46 (tail pulley) and a pulley 47 (head pulley) provided on a conveyor frame 45. . Numeral 49 denotes a carrier roller provided in the form of a trough roller, and numeral 50 denotes a return roller which is provided in the form of a flat roller. In the illustrated example, the pulley 47 is a drive pulley and is driven by a drive motor. Alternatively, the pulley 46 is a drive pulley and is driven by a drive motor. The conveyor belt 48 is driven by the drive pulley which is provided separately on the conveyor C and driven by a motor. In this illustrated example,
The pulley 47 is a drive pulley, and the conveyor belt 48 is driven by a drive motor 51 in the direction of arrow Y.

A hopper 52 is provided on the side of the belt conveyor C thus configured on which the pulley 46 is provided so as to cover both sides of the conveyor belt 48 and the tail side of the conveyor. The side that is located is configured as a tail side Ca of the belt conveyor C that can receive excavated matter such as earth and sand by the working device D such as the backhoe attachment.

The belt conveyor C having such a configuration is
The tail side Ca of the belt conveyor C is located on the side of the working space of the working device D so as to be located on the side of the upper revolving superstructure B, particularly the working device D including the offset boom D'a. This working device D
The excavated material such as earth and sand excavated and scooped up by the excavator is positioned in a projecting state at a position where the excavated material is put into the hopper 52, and the head side Cb of the belt conveyor C provided with the pulley 47 is connected to the hydraulic excavator. , More specifically, a projecting state in which the excavated material carried by the ascending belt 48a can be loaded on a transporting means E such as a dump truck standing behind the working space of the working device D. Is provided.

That is, the belt conveyor C of the hydraulic shovel according to the illustrated example is provided on the side of the working device D and is provided in the front-rear direction of the upper swing body B, and is provided from the working space side of the working device D. It is provided so that excavated materials such as earth and sand can be sent toward the rear side of the excavator.

The belt conveyor C having such a structure is as follows.
A first supporting means F as a pair of supporting means provided in a standing state at a predetermined interval before and after the upper swing body B;
With the second supporting means G, the upper revolving unit B is provided so as to be capable of turning laterally, tilting up and down, and moving up and down.

The first support means F for supporting the belt conveyor C is provided at the relatively tail side C of the belt conveyor C.
a, which is supported on the front side of the upper revolving structure B, and which moves the belt conveyor C in the vertical direction, and moves the belt conveyor C in the horizontal direction, for example, in the horizontal direction. The rotating part Fb includes a rotating part Fb and a connecting part Fc that connects one of the lifting part Fa and the rotating part Fb to the other or to be rotatable with each other. The first lifting / lowering means Ha
The turning portion Fb forms a turning shaft portion of the turning means K.

First, the elevating portion Fa constituting the first elevating means Ha is moved in the width direction so as to receive the width side ends of the belt conveyor C (in this specification, the width direction of the belt conveyor C is the same as that of FIG. In the direction indicated by s-s, that is, the direction orthogonal to the direction of the arrow Y in which the luggage is moved by the conveyor belt 48.) The hydraulic cylinder 54 for elevating and lowering between the guide tools 53 is connected to the guide cylinder 53a and the lower end of the cylinder 54a at the lower side by pins 55 and 56 facing the width direction of the belt conveyor C, respectively. A connecting plate 57 that is attached to the upper swing body B and that integrally connects the upper ends of the guide rods 53b, 53b that are vertically movably fitted to the guide cylinder 53a.
The upper portion of the piston rod 54b of the lifting hydraulic cylinder 54 is attached to the belt
(In this specification, the front-back direction of the belt conveyor C refers to the direction of tt in FIG. 3, that is, the direction connecting the tail side Ca of the belt conveyor C and its head side Cb. The connecting plate 57 is provided movably in the up-down direction by the lifting hydraulic cylinder 54 with each lifting guide 53 as a guide.

The turning portion Fb constituting the turning shaft portion of the turning means K has a lower plate portion 45a of the conveyor frame 45 of the belt conveyor C, and a bearing plate integrally provided on the lower plate portion 45a. A shaft hole 63 provided so as to communicate with the shaft 62, a plate portion 60a of the receiving frame 60 that supports the lower surface plate portion 45a, and a bearing plate 64 provided integrally with the lower surface of the plate portion 60a. A large-diameter head 61a is formed with respect to a shaft hole 65 provided so as to communicate therewith.
Is inserted from the side of the shaft hole 63,
In a state where the large-diameter head 61a is in contact with the surface of the bearing plate 62, a stopper 66 is attached to a projecting portion of the revolving shaft 61 projecting below the bearing plate 64, and a belt conveyor C is mounted on the receiving frame 60. Is configured to be able to turn in the horizontal direction, for example, in the horizontal direction, around the turning shaft 61 as a turning center.

The connecting portion Fc for connecting the elevating portion Fa and the revolving portion Fb constitutes a first elevating means Ha together with the elevating portion Fa, and is provided on the connecting plate 57 in an upright state. The pair of receiving pieces 67 provided and the respective receiving pieces 6
A pair of paired receiving pieces 68 vertically suspended from the lower surface of the receiving frame 60 so as to sandwich the sheet 7 from both sides are rotatably mounted by pins 69 facing the width direction of the belt conveyor C. There is a configuration.

Next, the second support means G is provided on the rear side of the upper revolving unit B with respect to the first support means F, and the position of the belt conveyor C is compared with the position of the support by the first support means F. It is configured to support the target head side Cb.

The second support means G includes an elevating section Ga for moving the belt conveyor C in the vertical direction, a lateral moving section Gb for moving the belt conveyor C in the horizontal direction, and an elevating section Ga.
And a connecting portion Gc that connects the lateral moving portion Gb so that the belt conveyor C is tilted up and down in the front-rear direction, and the second portion of the belt conveyor C is moved by the elevating portion Ga. The lifting / lowering means Hb and the belt conveyor C are moved by the horizontal moving portion Gb to the rotating shaft 61.
The turning means K of the belt conveyor C that turns in cooperation with the turning portion Fb around the turning center is constituted.

In the second supporting means G, the elevating part Ga constituting the second elevating means Hb is vertically slidable in a guide cylinder 70 provided integrally with the upper swing body B. The hollow guide post 71 is connected to the hydraulic cylinder 72
The hydraulic cylinder 72 is rotatably mounted on the cylinder 72a side of the hydraulic cylinder 72 with a pin 73 in the widthwise direction of the belt conveyor C with respect to the upper revolving structure B. The piston rod 72b side of the hydraulic cylinder 72 extending with the inside of the post 71 facing upward is
The belt conveyor C is rotatably mounted by pins 74 in the front-rear direction.

Next, the turning means K together with the turning portion Fb
Is a box frame 7 that supports the lower surface side of the conveyor frame 45 of the belt conveyor C.
The belt conveyor C is moved laterally on the box frame 75 by a hydraulic cylinder 76 provided in the box 5.

The box frame 75 is formed in a rectangular parallelepiped shape having a flat receiving surface on the upper surface.
A hydraulic cylinder 76 is provided in the width direction of the box frame 75, and the cylinder 76a side of the hydraulic cylinder 76 is rotatably mounted by a pin 77 which is perpendicular to a bracket 75a of the box frame 75. At the same time, the piston rod 76b side of the hydraulic cylinder 76 is rotatably assembled to the bracket 45b of the conveyor frame 45 positioned outside the box frame 75 by a pin 78 in a vertical direction. .
The bracket 45b of the conveyor frame 45 is
It is provided so as to be integral with the conveyor frame 45 from the conveyor frame 45 toward the widthwise side of the belt conveyor C. The piston rod 76b of the hydraulic cylinder 76 is provided on the side of the box frame 75. It is configured to receive a front end on the side and to include a pin receiving piece 79 connecting the pin 78 with the pin 78.

The box frame 75 is provided with a guide slit 80 on the upper surface plate portion 75b in the width direction of the belt conveyor C, and a reinforcing plate surrounding the lower surface of the guide slit 80. 81 are provided. With respect to the guide slit 80 of the box frame 75, the lower plate 45 of the conveyor frame 45
a and a reinforcing plate 82 integrally provided on the lower surface plate portion 45a.
The pin 8 having the large diameter head 84a is
4 and the guide slit 80, especially the reinforcing plate 8
By attaching the stopper 85 to the pin 84 protruding from 1 so as to abut on the surface of the reinforcing plate 81, the horizontal moving portion Gb is attached to the conveyor frame 45 in a state where the moving width of the belt conveyor C is regulated. It is assembled.

The connecting portion Gc for connecting the elevating portion Ga and the laterally moving portion Gb thus configured constitutes the second elevating means Hb together with the elevating portion Ga. A pair of pin receiving pieces 8 provided on
6 and 86, a pair of pin receiving pieces 87, 87 provided downward from the lower surface plate portion 75c of the box frame 57 are rotated by pins 88 in the width direction of the belt conveyor C. It is a configuration that is assembled as possible.

The belt conveyor C having such a configuration
Is a turning portion Fb of the turning means K of the first supporting means F, more specifically, the second supporting means G is directed in a horizontal direction, for example, a horizontal direction around a turning shaft 61 as a turning center.
The rotation means K can be rotated by a horizontal moving portion Gb, more specifically, by a hydraulic cylinder 76.

Further, by operating the lifting / lowering portion Fa of the first supporting means F, which constitutes the first lifting / lowering means Ha, more specifically, the hydraulic cylinder 54, the belt conveyor C is operated.
Can be tilted up and down with the second support means G as a base point.

The belt conveyor C is moved to the first support position by operating a lifting / lowering portion Ga constituting the second lifting / lowering means Hb of the second support means G, more specifically, a hydraulic cylinder 72. It is possible to tilt up and down with the means F as a base point.

Further, an elevating part Fa constituting the first elevating means Ha of the first supporting means F, more specifically, a hydraulic cylinder 54, and a second elevating means Hb of the second supporting means G
Elevating part Ga which constitutes the hydraulic cylinder 7
2, the belt conveyor C can be moved in the vertical direction or tilted in the vertical direction.

The belt conveyor C according to the illustrated example
A part of the head side Cb of the belt conveyor C is referred to as a folded portion C ", and this folded portion C" is referred to as a belt conveyor C.
Is configured to be foldably connected to the bracket 93 provided on the main body portion C ′ on the tail side Ca by using the pin 89 as a fulcrum, so that the configuration during transportation or storage can be made compact. .

The foldable portion C ″ of the belt conveyor C is folded with respect to the main body portion C ′, and the belt conveyor C is configured so that the foldable portion C ″ and the main body portion C ′ are mounted on the same straight line. The folded portion C ″ is provided with a pin 89 with respect to the bracket 93 of the main body portion C ′.
And the piston rod 90a of the hydraulic cylinder 90 provided in the main body C '.
A guide link 91 whose end is pivotally supported by the main body C ′;
One end side is pivotally supported by a pivot portion of a drive link 92 pivotally supported by the folding portion C ", and by operating the hydraulic cylinder 90, the folding portion C" is straightened with respect to the main body portion C '. From the state of being used on the line, it can be folded at a predetermined angle.

In the belt conveyor C having such a configuration, the rotating means K, the first and second elevating means H
By the operations a and Hb, the belt conveyor C can be positioned at a predetermined angle in the horizontal direction, at a predetermined angle in the vertical direction, or conveniently positioned at a predetermined height.

In the hydraulic excavator provided with the belt conveyor C having the above-described configuration, the tail side of the belt conveyor C provided on the upper rotating body B may be used in accordance with the situation of a specific work site such as excavation. The height of Ca and the mounting position in the left-right direction are adjusted so that the vertito conveyor C does not hinder the digging operation during the digging operation and the like, and the digging material can be efficiently loaded on the belt conveyor C by the working device D. Can be set to

Further, even in a situation such as a work site, in particular, when there is a restriction on a standby position of the transporting means E such as a dump truck, an appropriate loading position in the standby transporting means E (there is no single load). Position), the head side Cb of the belt conveyor C is positioned, and the height of the head side of the belt conveyor C is set so that the excavation can be conveniently loaded on the transporting means E. Can be adjusted and set.

Further, in the hydraulic shovel provided with the belt conveyor C having such a configuration, the hydraulic shovel itself is stored by rotating the belt conveyor C in the left-right direction or tilting or moving the belt conveyor C in the vertical direction. Alternatively, it can be in a form convenient for transportation.

[0066]

According to the hydraulic shovel according to the present invention, a belt conveyor is provided on an upper revolving structure of a hydraulic shovel having an offset boom so as to be able to receive an excavated material by the hydraulic shovel. A rotating means for rotating in the left-right direction, and a first lifting means and a second lifting means of the belt conveyor provided at a predetermined interval in a direction of transporting the load on the belt conveyor, Since the inclination and / or height of the belt conveyor can be changed by cooperation of the first lifting / lowering means and the second lifting / lowering means, the hydraulic excavator can be used without rotating the upper rotating body. The excavator can excavate a predetermined area in front of the excavator, and the excavated object by the hydraulic shovel can be turned into an upper revolving unit by a working device having an offset boom. It can be loaded onto the provided belt conveyor, and can be sent to a transportation means such as a dump truck waiting near the hydraulic excavator. There is no need to rotate the revolving structure, no need to rotate the belt conveyor, and no need to provide a hopper or the like to be opened and closed by the belt conveyor.

In the hydraulic excavator thus configured, the upper revolving structure is swiveled toward the direction of excavation so that the offset boom can be moved in any direction different from the traveling direction of the lower traveling structure. Excavating a predetermined range in front of the front attachment provided with the upper revolving structure without rotating the upper revolving structure, and placing the excavated object on a belt conveyor provided on the upper revolving structure, and using the belt conveyor to dump the truck. It can be sent to transportation means such as.

Further, in the hydraulic excavator having the above-described structure, prior to the excavation, a transporting means such as a dump truck is used in accordance with the situation of each work site.
With the head side of the belt conveyor rotated to the most convenient position, and with the belt conveyor set, the excavation by the working device can be securely carried out at the set predetermined position such as a dump truck. It can be loaded onto a vehicle.

Further, in the hydraulic excavator having the above-described configuration, in accordance with the situation of each work site, efficient excavation of excavated materials by a working device having an offset boom, and a belt conveyor of the excavated materials. The tail side of the belt conveyor is pivotally positioned at the efficient loading position for, and in a state where it is set, the excavated material by the working device is sent from this pivoted position toward a transportation means such as a dump truck. be able to.

Further, in the hydraulic excavator having such a configuration, the tail side of the belt conveyor can be arbitrarily set up and down in accordance with the situation of each work site or the form of each transport means such as a dump truck. Can be set at height. Similarly, the head side of the belt conveyor can be positioned and set at an arbitrary height in the vertical direction. Further, similarly, the belt conveyor can be positioned and set at an arbitrary height in the vertical direction.

Further, in the hydraulic shovel having the above configuration, when the hydraulic shovel is transported by the transporting means and stored in a storage, etc., the belt conveyor provided in the upper rotating body is transported or transported. It can be turned in a horizontal direction so as to be in a form convenient for storage or the like. Similarly, it can be moved up and down. Similarly, one or both of the tail side and the head side of the belt conveyor can be turned in the vertical direction.

[Brief description of the drawings]

FIG. 1 is a side view of a state in which a hydraulic excavator according to an exemplary embodiment of the present invention is used.

FIG. 2 is a plan view of the same.

FIG. 3 is a plan view showing an operation state of the excavator.

FIG. 4 is an essential part plan view showing a tip end side of a working device D in the hydraulic excavator.

FIG. 5 is a side view of the excavator as viewed from a side opposite to FIG. 1;

FIG. 6 is a sectional view showing a main part of a first support means F provided in the hydraulic excavator in a cutaway manner.

FIG. 7 is a side view of the main part.

FIG. 8 is a partially cutaway side view of the components constituting the first support means F.

FIG. 9 is a cross-sectional view showing a main part of the second support means G provided in the hydraulic excavator in a cutaway manner.

FIG. 10 is an essential part cross-sectional view showing the upper side of the second support means G;

FIG. 11 is a side view of a main part of the second supporting means G;

FIG. 12 is a sectional view of a main part of a component of the second support means G;

FIG. 13 is a side view showing the excavator in a state where the belt conveyor is folded.

[Explanation of symbols]

 Reference Signs List A Lower traveling body B Upper traveling body C Belt conveyor D Working device D'a Offset boom K Rotating means Ha First lifting / lowering means Hb Second lifting / lowering means

Claims (1)

[Claims] 1. A belt conveyor is provided on an upper revolving structure of a hydraulic shovel having an offset boom so as to receive an excavated object by the hydraulic shovel, and the belt conveyor is rotated to rotate left and right. Means, and first and second raising and lowering means of the belt conveyor provided at predetermined intervals in the direction of transporting the load on the belt conveyor, wherein the first raising and lowering means and the second raising and lowering means are provided. A hydraulic excavator having a configuration in which both or any one of the inclination and the height of the belt conveyor can be changed in cooperation with the lifting means.