JPH06212668A - Revolving excavator - Google Patents

Abstract

PURPOSE:To perform ditching of a gutter when a road is wide enough to allow traveling of a revolving excavator, in a narrow road. CONSTITUTION:A working machine is arranged to the front end of a revolving frame and the outside diameter RB of the working machine mounted on the tip of the revolving frame through a boom bracket 2 is made equal to the car width A of a traveling device. Further, the outside diameter RB of the outermost part of the boom bracket 2 is set to a value approximately equal to or lower than the car width A of a crawler type traveling device 3 in a state that the boom bracket 2 to which a boom 1 is pivotally supported is prohibited from swinging. In a state that the boom bracket 2 is prohibited from swinging, the outside diameter RD of the front of the revolving frame is decreased to a value lower than the car width A and the outside diameter RA of the rear end of a revolving frame F is increased to a value larger than the car width A.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention is applicable to narrow alleys and the like.
The present invention relates to a full swing excavator capable of digging a gutter as long as the swivel excavator can travel.

[0002]

2. Description of the Related Art A conventional swing excavator is constructed as shown in FIGS. That is, the boom bracket 2 pivotally supported at the tip of the turning frame F projects more than the vehicle width A in a state where it is not swung, and the outer diameter RA at the rear end of the turning frame F is naturally the vehicle width. If there was no space larger than A and wider than the vehicle width A, it was impossible to make a full turn. Therefore, even when digging a gutter, if the crawler type traveling device 3 is brought close to a position close to the right road wall R or the left road wall L, it is impossible to mount the excavated earth and sand on the loading platform of the rear truck. With the crawler type traveling device 3 released from the alley wall, the gutter was dug with the bucket 12 parallel to the front-rear direction.

[0003] In another conventional technique, a full swing type excavation is performed by arranging a boom base portion on a side of a seat and near a center of a swing frame and forming a coffee cup type as a whole. The technology that constitutes the machine is known. However, in the full-swing excavator of this configuration, since the bucket moves up and down on the side of the seat, the excavated earth and sand may drop toward the seat, and the bucket may interfere with the canopy and the operator. Therefore, there was a problem that it was necessary to provide a sufficient safety mechanism.

[0004]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems of the prior art. That is, the working machine constitutes a turning excavator which is arranged at the front end of the turning frame F in front of the seat and is capable of making full turns, like a conventional turning excavator. As a result, the bucket 12
Since the earth and sand excavated by the above does not fall on the seat S and the bucket 12 does not interfere with the canopy 14 or the cabin, it is not necessary to provide an interference avoiding safety device. Even when the outer diameter RA of the rear portion of the swing frame F is larger than the vehicle width A, the outer diameter RB of the boom bracket 2 at the front end of the swing frame F is smaller than the vehicle width A. It enables gutter digging and close excavation to the wall.

[0005]

The problems to be solved by the present invention are as described above. Next, the means for solving the problems will be described. That is, the working machine is arranged at the front end of the swing frame, and the boom bracket 2 is attached to the tip of the swing frame.
The outer diameter RB of the working machine mounted via the
Is almost the same as.

Further, in the swing excavator in which the working machine is arranged at the front end of the swing frame and the outer diameter RB of the boom bracket 2 attached to the front end of the swing frame is substantially the same as the vehicle width A of the traveling device, The outermost outer diameter RB of the boom bracket 2 is set to be substantially the same as or smaller than the vehicle width A of the crawler type traveling device 3 in a state in which the boom bracket 2 pivotally supporting 1 is not swung.

Further, in a revolving excavator in which a working machine is arranged at the front end of the revolving frame, the outer diameter RD of the front surface of the revolving frame without swinging the boom bracket 2
However, it is smaller than the vehicle width A, and the outer diameter RA of the rear end of the turning frame F is larger than the vehicle width A.

[0008]

[Operation] Next, the operation will be described. That is, since the working machine is arranged in front of the seat S, it is safe without excavated soil falling onto the seat S, and it is not necessary to provide a safety device for preventing interference between the bucket 12 and the canopy 14, All-round excavation became possible. Further, it becomes possible to place the excavated earth and sand on the rear bed of the truck in a posture with the bucket 12 extended forward without swinging the swing cylinder 20 to swing the bucket 12 left and right. In addition, the left alley L and the right alley R
In addition to gutter digging, the part close to is also possible to dig in the direction perpendicular to the wall upper surface. Further, when either the left alley wall L or the right alley wall R is an alley away from the crawler type traveling device 3, the swivel frame F is swiveled to the excavated ditch side in the gutter digging posture to remove the earth and sand. Since it can be mounted on the rear truck, the excavation work performance could be improved. Further, since the excavation is possible with the boom bracket 2 protruding forward from the swing frame F, it is possible to excavate the edge of the left road wall L or the right road wall R in a right angle direction.

[0009]

EXAMPLES Next, examples will be described. 1 is a rear view of the embodiment in which the boom bracket 2 is not swinging and the outer diameter RB is smaller than the vehicle width A, and FIG. 2 is a plan view showing a left groove digging posture by the turning excavator of the embodiment of FIG. 3 and 4, the outside diameter RD when the boom bracket 2 is not swung is the vehicle width A.
Is smaller than the working width of the embodiment in which the outer diameter RA of the rear end of the swing frame F is larger than the vehicle width A, FIG. 4 is a plan view of the embodiment of FIG. 3, and FIG. 5 is a boom bracket. 2 is a side view, FIG. 6 is a plan view of the boom bracket 2 of FIG. 5, FIG. 7 is a side sectional view showing another embodiment of the boom bracket 2, and FIG. 8 is a plan view of the boom bracket 2 of FIG. FIG. 10 is a plan view of a conventional swivel excavator, and FIG. 10 is a rear view of the conventional swivel excavator in a side face excavated state.

The embodiment shown in FIGS. 1 and 2 will be described. The traveling device is a crawler type traveling device 3, and a swivel bearing 6 is arranged on the frame of the crawler type traveling device 3. The swivel bearing 6 supports a swivel frame F having an arc shape so as to be fully swivelable. A boom 1 as a working machine, a bucket arm 11, and a bucket 12 are arranged in front of the swing frame F via a boom bracket 2. The boom 1 is rotated up and down by a boom cylinder 18, the bucket arm 11 is rotated by an arm cylinder 8, and the bucket 12 is scooped and rotated by the bucket cylinder 4.

The base of the boom 1 is supported by the boom bracket 2 so that it can swing left and right with respect to the swing frame F, and the swing cylinder 20 supports the swing frame F.
Is horizontally projected in the direction of the boom bracket 2 from the inside, and a piston portion is pivotally supported by a swing cylinder pivotal projection 7 to be described later. A seat S is arranged at a position on the left side of the hood 13, and a canopy 14 is arranged on the seat S. An operation column is arranged in front of the seat S. In the present invention, the base portion of the boom bracket 2 is not on the side of the seat S but on the swing frame F.
It is located in front of the. A lower portion of the boom 1 is pivotally supported in the boom bracket 2 at a boom pivot hole 2c, and a lower end of the boom cylinder 18 is pivotally supported in a boom cylinder pivot hole 2d of the boom bracket 2.

Next, referring to FIG. The revolving frame F is formed in an arc shape, and the outer diameter of the revolving frame F is substantially the same as the outer diameter RB of the tip of the boom bracket 2. The outer diameter RB is shown in FIGS.
In the embodiment, the outer diameter RC of the revolving frame F is substantially the same. Both the outer diameter RB and the outer diameter RC are configured to be substantially the same as the vehicle width A configured by the crawler type traveling device 3. Therefore, in an alley where the crawler type traveling device 3 can travel, it is possible to make a full turn without swinging the crawler type traveling device 3 left and right.

In the embodiment shown in FIGS. 1 and 2, the outer diameter RB and the outer diameter RC are smaller than the vehicle width A at both the front and rear portions of the revolving frame F. It can be done in either direction. Boom bracket 2
Since the outer diameter RC of the revolving frame F and the outer diameter RB of the tip of the boom bracket 2 are substantially the same without swinging forward, the outer diameter RB of the tip of the boom bracket 2 is substantially the same as the outer diameter RC of the boom bracket 2 when swinging and rotating. Since the diameter RB is smaller than the outer diameter RC, it goes without saying that the gutter can be dug.

Next, a description will be given of the embodiment shown in FIGS. 3 and 4. In the case of this embodiment, it is a large turning excavator, and it is impossible to fit the entire turning frame F within the width of the vehicle width A of the crawler type traveling device 3. Therefore, when either the right alley wall R or the left alley wall L is away from the vehicle width A, that is, in the case of an alley slightly wider than the vehicle width A, it is possible to efficiently ditch the gutter. Swivel frame F
The outer diameter RD of the entire boom bracket 2 in the state of not swinging is stored within the width of the vehicle width A. Thereby, the left road wall L and the right road wall R on the side to be excavated can be approached to the immediate vicinity, and the adjacent side trench can be dug, and by turning the turning frame F to the excavated side,
The earth and sand can be placed on the rear bed of the truck. As a result, the excavation efficiency of the ditch excavation can be improved. Further, as shown in FIG. 3, it is also possible to excavate the upper surface of the left back ground wall L on the side closer to the crawler type traveling device 3 in a right angle direction.

Next, the construction of the boom bracket 2 will be described with reference to FIGS. 5, 6, 7 and 8. In the embodiment shown in FIGS. 7 and 8, the swing pivot pin hole 10 at the tip of the boom bracket 2 is inserted into the recess 2a of the boom bracket 2, and the boom cylinder pivot hole 2d is formed.
A distance t1 + t2 from is required. However, in the case of the embodiments of FIGS. 5 and 6, the portion of the swing pivot support pin hole 10 of the boom bracket 2 is configured as an external fitting type, and is placed outside the swing pivot support pin hole 2b of the boom bracket 2. Since it is configured to be inserted and inserted, the distance from the swing pivot support pin hole 10 to the boom cylinder pivot support hole 2d can be configured to be as short as t1. The boom pivot hole 2c is a bracket that pivotally supports the boom bracket 2, and the boom cylinder pivot hole 2d is a bracket that pivotally supports the boom cylinder 18. Although the swing cylinder pivotal projection 7 projects to the right side of the boom bracket 2, the swing cylinder pivotal projection 7 may be on the left side of the boom bracket 2.

[0016]

Since the present invention is constructed as described above, it has the following effects. That is, as in claim 1,
Since the working machine is arranged at the front end of the swing frame, and the outer diameter RB of the working machine mounted on the tip of the swing frame via the boom bracket 2 is made substantially the same as the vehicle width A of the traveling device, the working machine is seated on the seat S. Since it is arranged in front of the vehicle, it is safe that the excavated soil does not fall on the seat S, and it is not necessary to provide a safety preventive device for preventing the interference between the bucket 12 and the canopy 14, but it is possible to excavate all the turns. It has become.

In a swing excavator in which a working machine is arranged at the front end of a swing frame and the outer diameter of the swing frame is substantially the same as the width of the traveling device, a boom bracket for pivotally supporting the boom 1 is provided. Since the outermost diameter RB of the outermost portion of the boom bracket 2 is set to be substantially the same as or smaller than the vehicle width A of the crawler type traveling device 3 in a state in which 2 is not swung, the swing cylinder 20 is expanded and contracted to swing the bucket 12 left and right. Without doing so, it becomes possible to place the excavated earth and sand on the bed of the rear truck with the bucket 12 extended forward. Further, in addition to the gutter digging, the portions near the left alley wall L and the right alley wall R can also be excavated in the direction perpendicular to the wall upper surface.

In the swing type excavator in which the working machine is arranged at the front end of the swing frame, the outer diameter RD of the front surface of the swing frame is larger than the vehicle width A in a state where the boom bracket 2 is not swung. Since the outside diameter RA at the rear end of the turning frame F is set to be larger than the vehicle width A, when either the left alley wall L or the right alley wall R is an alley away from the crawler type traveling device 3, In the gutter digging posture, the swivel frame F can be swung to the side of the excavated gutter and the earth and sand can be placed on the rear truck, so that the excavation work performance can be improved. Further, since the excavation is possible with the boom bracket 2 protruding forward from the swing frame F, it is possible to excavate the edge of the left road wall L or the right road wall R in a right angle direction.

[Brief description of drawings]

[Fig. 1] With the boom bracket 2 not swinging,
The rear view of the embodiment in which the outer diameter RB is smaller than the vehicle width A.

FIG. 2 is a plan view showing a left trench digging posture by the turning excavator of the embodiment of FIG.

FIG. 3 is a rear surface of the working state in which the outer diameter RD when the boom bracket 2 is not swung is smaller than the vehicle width A and the outer diameter RA at the rear end of the swing frame F is larger than the vehicle width A. Fig.

FIG. 4 is a plan view of the embodiment of FIG.

FIG. 5 is a side view of the boom bracket 2.

FIG. 6 is a plan view of the boom bracket 2 of FIG.

FIG. 7 is a side sectional view showing another embodiment of the boom bracket 2.

8 is a plan view of the boom bracket 2 of FIG. 7. FIG.

FIG. 9 is a plan view of a conventional swivel excavator.

FIG. 10 is a rear view of a conventional swing excavator in a side excavation state.

[Explanation of symbols]

 L Left ground wall R Right ground wall F Swing frame O Swing center 1 Boom 2 Boom bracket 3 Crawler type traveling device 4 Bucket cylinder 6 Swing base bearing 7 Swing cylinder pivot protrusion 8 Arm cylinder 9 Pivot bracket 12 Bucket

Claims (3)

[Claims] 1. A work machine is arranged at a front end of a swing frame,
A swivel excavator characterized in that an outer diameter RB of a working machine attached to the tip of the swivel frame via a boom bracket 2 is substantially the same as a vehicle width A of a traveling device. 2. A working machine is arranged at the front end of the swing frame,
In a swing excavator in which the outer diameter RB of the boom bracket 2 attached to the front end of the swing frame is substantially the same as the vehicle width A of the traveling device, the boom bracket 2 pivotally supporting the boom 1 is not swung, and the boom bracket 2 is not swung. A swivel excavator characterized in that the outermost outer diameter RB of 2 is substantially equal to or less than the vehicle width A of the crawler type traveling device 3. 3. A revolving excavator in which a working machine is arranged at a front end of a revolving frame, and an outer diameter RD of a front surface of the revolving frame is in a state where a boom bracket 2 is not swung.
The outer diameter RA of the rear end of the turning frame F should be smaller than the vehicle width A.
Is a swivel excavator characterized by being larger than the vehicle width A.