JP2812417B2 - Swiveling excavator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a revolving digging work vehicle capable of digging a trench in a narrow alley or the like.

[0002]

2. Description of the Related Art Conventionally, a pivot for a working machine such as a boom is provided at a position in front of a seat and in front of a revolving frame, and the rear of the revolving frame protrudes from within the width of the traveling device during turning. The technology related to the revolving excavation work vehicle called the standard type backhoe having the configuration has been known. Further, in order to solve the problem that the rear of the turning frame of the standard type backhoe projects during turning, the base of the working machine is arranged on a side of the seat and substantially near the center of the turning frame, By making the whole coffee cup type,
2. Description of the Related Art A technique related to an ultra-small turning type backhoe constituting a turning type excavator is known.

[0003]

Conventionally, standard type batteries have been used.
There was something called Kuho, but the following problems
Was. Traveling device when the rear part of the upper turning frame turns
The rear part collides with obstacles
It was easy. Especially when digging gutters near the wall,
As you perform the gutter digging with your body, stop on the opposite side of the wall
When turning to load earth and sand on
The rear part of the turning frame hits the wall and the upper part turns
I could not turn the frame. Therefore, narrow
Work in difficult places was impossible. Therefore, the above standard type
In order to solve the problem of backhoe, ultra-small swivel type back
Kuho was developed. For this ultra-small swiveling backhoe
In addition, the upper turning frame is
Because it does not protrude from the width, it fits within that width. Follow
Work in a narrow place. But guttering
At times, the ultra-small swivel backhoe is
Work machine in the left-right direction.
Offset boom mechanism at the top of the boom
It becomes important. This offset boom mechanism on top of the boom
By installing, when excavating the side ditch, the offset boom
Tilt the offset boom of the mechanism in the left and right direction to the gutter
When excavating with the bucket at the tip of the arm,
The offset boom mechanism contacts the edge,
There is a problem that it is not possible to dig deep gutters
Was. Also, when digging a gutter near the wall, dig the dirt in the gutter and
After raising the industrial machine and standing it, this earth and sand is used as a truck bed.
When turning to transport, work when digging gutters
Since the boom of the machine is offset,
When the working machine is raised and raised in the upright position,
The rear of the arm cylinder of the fset boom mechanism
Projecting from the room. Turn the swivel frame from this state.
The rear of the arm cylinder is behind the pivot frame.
From the rear part of the arm cylinder
However, it protrudes from the width of the traveling device. Therefore, arm syringe
The damper contacts the side wall, making it impossible to turn.
there were. In addition, an off-set
The work boom mechanism makes the weight of the work equipment heavy.
You. Therefore, when the work equipment is extended forward,
Because of the heavy weight, the balance of the work vehicle is poor. Also work machine
When the machine is lifted up, the work equipment is heavy.
The center position becomes higher and the stability becomes worse. For this reason
And cannot work or run at high speed.
Was. The invention of the present application has a disadvantage in that
It is to cancel the union.

[0004]

The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described. Turn the traveling device through the swivel table bearing.
The turn frame is mounted so as to be pivotable, and the pivot frame is
Arrange seats, bonnets, counterweights, etc.
At the front end of the revolving frame, place the implement in the vertical and horizontal directions
Digging pivotally supported through the work implement pivot so that it can operate
On the largest dimension behind the turning frame
Within the width of the line device, and turning
Turn the arm so that the right outside edge of the
Working on the front end of the swivel frame when aligned
Structured so that the pivot is located within the right width of the traveling device
And the boom and arm of the working machine
It is configured to be located within the width in the left-right direction .

[0005]

Next, the operation will be described. Swivel frame front end
The work implement can be pivoted vertically and horizontally.
And the largest dimension behind the swing frame
Because the width was within the width, the rear part of the upper
It does not collide with obstacles when turning. Ma
In addition, especially when digging trenches,
Can be operated in two directions, so that an offset boom mechanism is required.
There is no. This makes it possible to offset the edge of the
Bug that the bottom of the boom hits and cannot be dug deep
Does not occur. In the present invention, the turning frame is turned so that the direction of the right-hand groove and the direction of the working machine such as the boom, the arm, and the bucket are aligned with each other, and the boom and the arm are inserted into the excavated groove of the bucket. It is possible to dig a gutter deep because it can be buried in a ditch. Also,
The ultra-small swivel backhoe is turned off when digging a gutter near the wall.
Since the set boom mechanism exists, raise the work machine and
The arm cylinder swings rearward in the direction of travel.
The pivot frame in this state.
When turning, the arm cylinder contacts the side wall,
There was a problem that it was not possible to turn. In the present invention
At the front end of the revolving frame, place the work equipment vertically and left
Provide a pivoting part that pivots to the right, and
Since the large dimension portion is within the width of the traveling device, the offset boot
System is no longer required, which allows
Arm cylinder does not protrude rearward
You. Therefore, it was possible to dig a gutter near the wall, and
Turning to load earth and sand on the truck on the opposite side of the wall
The frame can be turned. In addition, office equipment
No work boom mechanism is required, so the work equipment is lighter and
Work without the balance of the fuselage
Even when I set up the machine, the position of the center of gravity did not rise, but became lower,
Therefore, work and traveling can be performed at a high speed.

[0006]

Next, an embodiment will be described. FIG. 1 shows the rotation of the present invention.
Right side view of the rotating-type excavation work vehicle, Fig 2 is pivoted a pivot frame F on the right, and swinging the boom bracket 2 on the left side, plan view of the right grooving position, Figure 3 is a rotating frame F <br / > turning to the left side, plan view of the left side grooving posture by swinging the boom bracket 2 on the right side, FIG. 4 is a plan view showing the position of the rotating frame F and the counterweight W1 · W2 · W3,
FIG. 5 shows the revolving frame F and the counterweights W1, W2,
Rear view showing the position of W3, Figure 6 is a revolving frame F and Cow
Side cross-sectional view of a fixed portion by fixing bolts 16 of Ntaueito W1, FIG. 7 shows a side view of the boom bracket 2, FIG. 8 is a plan view of the boom bracket 2 in FIG. 7, another embodiment of FIG. 9 is a boom bracket 2 FIG. 10 is a plan view of the boom bracket 2 of FIG.

Referring to FIG. 1, the structure of a turning type excavator will be described. The traveling device is a crawler traveling device 3, and a swivel bearing 6 is arranged on a frame of the crawler traveling device 3. The swivel frame F is supported by the swivel table bearing 6 such that the swivel frame F can be fully swiveled. A counterweight W is arranged at the rear of the revolving frame F, and a boom 1, a bucket arm 11, and a bucket 12 are arranged in front of the counterweight W. 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 a bucket cylinder 4. The base of the boom 1 is a turning frame F
The swing cylinder 20 protrudes horizontally from the inside of the revolving frame F in the direction of the boom bracket 2 to support the swing cylinder pivoting projection 7 described later. The part is pivotally supported by a piston part.

A seat S is provided on the left side of the hood 13.
Are arranged, and the 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 of the boom bracket 2 is arranged not at the side of the seat S but at a position in front of the turning frame F. In part of the probe <br/> over arm pivot hole 2c of the boom bracket 2 are pivoted lower part of the boom 1, the portion of the boom bracket 2 boom cylinder pivot hole 2d is the lower end of the boom cylinder 18 pivot Supported.

Next, FIG. 2 and FIG. 3 will be described. The revolving frame F is formed in an arc shape, and the outer diameter Ra of the revolving frame F is contained within the left and right width of the crawler traveling device 3. However, when the crawler-type traveling device 3 is disposed in a normal posture in front as shown by a chain line in FIG. 2, the tip of the boom bracket 2 is in a state of protruding from the outer diameter Ra. In a posture with the minimum width that the crawler-type traveling device 3 can pass in the posture, it is impossible to make a full turn. However, as shown by the solid line in FIG. 2, when the turning frame F is turned rightward and the boom bracket 2 is swung to the left, the part of the swing cylinder pivoting projection 7 of the boom bracket 2 is outside the turning frame F. Diameter R
a, and the turning outer diameter Rb of the tip of the swing cylinder pivoting projection 7 in this case only slightly emerges from the outer diameter Ra, so that the turning frame F can be turned to the very end of the right alley wall. , bucket 12 it is possible to parallel proximity with alley wall is the side grooving can.

However, since the turning outer diameter Rb is larger than the outer diameter Ra, it is impossible to turn the turning frame F further rightward and put the excavated soil on the bed of a truck behind. It is. However, as shown in FIG. 3, by turning the turning frame F to the left, it is possible to turn to the rear. That is, the turning frame F is turned to the left,
When the boom bracket 2 swings to the right, the tip of the boom bracket 2 enters the outer diameter Ra,
The swing cylinder pivot projection 7 also falls within the outer diameter Ra. Therefore, the turning outer diameter Rc of the boom bracket 2 is smaller than the outer diameter Ra, and there is no protrusion from the outer diameter Ra, so that the turning frame F can be fully turned as it is.

However, in FIG. 3, although the bucket 12 is likely to interfere with the alley wall, the bucket 12 is located above the revolving frame F and at a position considerably higher than the alley wall. By arranging, it is possible to make a full turn without interference.

Next, the configuration of the counter weight W will be described with reference to FIGS. By making the revolving frame F arc-shaped and small, and providing a working machine at the front end,
It is necessary to make the counterweight W, which balances the weight of the working machine, somewhat large. But in plan view
With a thick counterweight that projects rearward with
For example, the maximum value behind the turning frame including the counterweight
Since the dimension part protrudes from within the width of the traveling device,
A counterweight with a large thickness protruding in the direction
Can not. In the present invention, the counterweight is
Rather than making it thicker and heavier in plan view,
To increase the height of the counterweight W to the height h1 and weight
The heavier, it is of taking the weight balance. The reason why the height is set to h1 is that only the rearmost counterweight W1 having the longest horizontal distance from the turning center 0 is used. The left and right counterweights W2 and W3 have the same conventional height h2.

FIG. 6 is a cross-sectional view of a portion where the counterweight W1 is fixed to the turning frame F. The portion where the counterweight W1 is fixed has a large strength at which the engine stand 15 is fixed to the turning frame F. Part. The counterweight W1 is fixed to the revolving frame F of this portion by a fixing bolt 16.

Next, the structure of the boom bracket 2 will be described with reference to FIGS. 7, 8, 9 and 10. FIG. 7 and 8
In the embodiment, 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 a distance t1 + t2 from the boom cylinder pivot hole 2d is required. is there. However, in the case of the embodiment shown in FIGS. 9 and 10, the portion of the swing pivot pin hole 10 of the boom bracket 2 is formed as an external fitting type, so that it is located outside the swing pivot pin hole 2b of the boom bracket 2. Since it is configured to be inserted, the distance from the swing pivot pin hole 10 to the boom cylinder pivot hole 2d can be configured to be close to only t1. Boom Braquet
The boom pivot hole 2c of the unit 2 is a bracket for pivotally supporting the boom 1 , and the boom cylinder pivot hole 2d is a bracket for pivotally supporting the boom cylinder 18. The swing cylinder pivoting projection 7 protrudes from the right side of the boom bracket 2, but the swing cylinder pivoting projection 7 may be on the left side of the boom bracket 2.

[0015]

As described above, the present invention has the following advantages. Conventionally, standard type
There was something called Kuho, but the following problems
Was. Traveling device when the rear part of the upper turning frame turns
The rear part collides with obstacles
It was easy. Especially when digging gutters near the wall,
As you perform the gutter digging with your body, stop on the opposite side of the wall
When turning to load earth and sand on
The rear part of the turning frame hits the wall and the upper part turns
I could not turn the frame. Therefore, narrow
Work in difficult places was impossible.

Therefore, the problems of the standard type backhoe are described below.
To solve this, a micro-swirl backhoe was developed.
In the case of this micro-swirl backhoe, the upper swing frame
Arm does not protrude from the width of the traveling device when turning
So it fits within the width. Therefore, work in narrow places is possible
It is. However, when digging a trench,
Kuho, work machine can only operate in the vertical direction,
At the top of the boom, move the implement right and left
An offset boom mechanism is required. This offset block
By installing a boom mechanism at the top of the boom,
The offset boom of the offset boom mechanism to the left.
In the right direction, tilt to the gutter side, and use the bucket at the tip of the arm
When excavating, the offset boom is on the edge of the gutter
Contact and cannot dig deeper than that
There was a problem. When digging a gutter near the wall,
After digging the dirt in the ditch and raising the work machine,
When turning to transport the truck to the truck bed
The work machine boom is offset when digging the gutter.
In this state, when you raise the work machine and stand it,
The arm series of the offset boom mechanism at the eccentric position is
The rear part of the housing projects from the turning frame. From this state
When the swivel frame is swiveled, the rear of the arm cylinder
Is projected from the rear part of the revolving frame,
The rear part of the arm cylinder protrudes from the width of the traveling device.
Therefore, the arm cylinder touches the side wall and cannot turn
There was a problem that becomes. Also configure the working machine
Since there is an offset boom mechanism at the top of the boom,
The work equipment becomes heavy. Therefore, extend the work machine forward
The work machine is heavy, the balance of the work vehicle is poor.
It becomes. Also, when the work machine is raised and set up,
Heavy, raises the center of gravity of the work vehicle, resulting in poor stability
Become. For this reason, you cannot work or run at high speed.
There was also a defect.

In the present invention, the micro-swirl type battery
It solves the problem of Kuho and has the following effects. First, a work machine is mounted on the front end of the revolving frame.
Pivotably and pivotably operably in vertical and horizontal directions
The maximum rear dimension of the frame is within the width of the traveling device.
Then, the rear part of the upper revolving unit fits within the width of the traveling device,
During turning, the rear part of the turning frame collides with an obstacle
do not do. Secondly, especially when digging gutters,
Work equipment can be operated vertically and horizontally at the front end
Pivot and travel the largest dimension behind the swing frame
Offset boom mechanism.
And within the width of the traveling device,
Can turn. As a result, the rear part of the turning frame runs.
Can be turned within the width of the rowing device, and at the time of trenching
Offset boom hits the edge of
No failures occur. In the present invention,
When digging the right groove, the direction of the right groove, the boom and the arm
Turn the swivel frame to a position where the directions match
The work equipment and traveling equipment can be
When the right outside edge of the
The boom and arm are within the width of the bucket
The boom and arm are bucket
Ditching can be done by placing it in the excavated trench,
Can be. Third, in the ultra-small swivel type backhoe, near the wall
Due to the presence of an offset boom mechanism when digging a gutter
When the work machine is raised and raised, the arm cylinder advances.
Since it protrudes from the turning frame at the rear in the row direction,
When turning the swivel frame in this state, the arm
Inability to turn because the da interferes with the upper part of the side wall
There was a match. In the present invention, the front end of the turning frame
Part that supports the work machine vertically and horizontally
The maximum dimension behind the swing frame is the width of the traveling device.
Inside, eliminating the need for an offset boom mechanism.
As a result, the arm cylinder turns when the work machine is set up
Does not protrude from the frame. Therefore, when turning
The rear part of the arm cylinder protrudes from the width of the traveling device.
Not. Therefore, trenches can be dug near the wall, and
For loading the soil on the truck on the opposite side of the wall
The turning frame can now be turned. Fourth, work equipment
Since no offset boom mechanism is required, the work equipment can be
Therefore, the front-rear balance of the aircraft does not deteriorate.
The center of gravity does not rise when the working machine is
Work and travel at high speed.

[Brief description of the drawings]

[1] a right side view of a rotary type drilling working vehicle of the present invention.

FIG. 2 is a plan view of a right-side ditching posture in which a turning frame F is turned rightward and a boom bracket 2 is swung leftward.

[Figure 3] turning the turning frame F on the left side, and swing the boom bracket 2 on the right side, plan view of the left side grooving position.

FIG. 4 shows a turning frame F and counterweights W1 and W2.
-The top view which shows the position of W3.

FIG. 5 shows a turning frame F and counterweights W1 and W2.
-Rear view showing the position of W3.

FIG. 6 is a side sectional view of a fixing portion of the revolving frame F and the counterweight W1 by a fixing bolt 16;

FIG. 7 is a side view of the boom bracket 2.

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

FIG. 9 is a side sectional view showing another embodiment of the boom bracket 2.

FIG. 10 is a plan view of the boom bracket 2 of FIG. 9;

[Explanation of symbols]

 F Swivel frame W Counterweight O Swivel center 1 Boom 2 Boom bracket 3 Crawler traveling device 4 Bucket cylinder 6 Swivel table bearing 7 Swing cylinder pivoting projection 8 Arm cylinder 9 pivoting bracket 12 bucket

──────────────────────────────────────────────────続 き Continued from the front page (56) References JP-A-51-67602 (JP, A) JP-A-61-76850 (JP, U) JP-A-63-71257 (JP, U) 4944 (JP, U) Japanese Utility Model Application Hei 1-75169 (JP, U) Japanese Utility Model Application Utility Model 57-202461 (JP, U) Japanese Utility Model Application Utility Model 1-164337 (JP, U) (58) Field surveyed (Int. ⁶ , DB name) E02F 9/08 E02F 3/32

Claims (1)

(57) [Claims] 1. A swing frame for a traveling device via a swing table bearing.
Arm is pivotally mounted, and seats and
Network, counter weights, etc.
At the front end of the frame, work implements are
Swiveling excavation work movably supported via the work equipment pivot
In a car, a traveling device is used
Within the width of
Turn the work machine and the right outer edge of the traveling device so that they are almost
The work implement pivot at the front end of the swivel frame when
Part is located within the right-hand width of the traveling device,
The boom and the arm of the working machine
A swiveling excavator, wherein the excavator is configured to be positioned within the width of the direction .