JPH083469Y2 - Power shovel - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hydraulic excavator capable of performing both bucket work and breaker work .

[0002]

2. Description of the Related Art Conventional hydraulic excavators are installed on top of hydraulic excavators.
Boom, arm and tip side of the arm at the front of the revolving structure
A work machine consisting of a bucket pivotably attached to the
Have been killed. Then rotate the bucket toward the vehicle body
Or turning away from the vehicle body for excavation work
Loading work (the above two works are called bucket work here)
Say) . Further, when performing rock drilling work or pavement crushing work with a power shovel, the bucket is removed, and a breaker b is attached to the tip of the arm a as shown in FIG. 4, and the work is performed by this breaker b.

However, conventionally, when the bucket work and the breaker work are alternately performed, the bucket and the breaker b are required each time.
However, there is a drawback in that it requires a lot of time and effort for the replacement work. In order to improve the above drawbacks, a work machine equipped with a breaker on its arm has also been proposed. See, for example, Japanese Utility Model Publication No. 59-27265. Also of the working machine
The one with a built-in breaker device inside the arm is also a real Kosho 4.
It is known from the publication of 8-13121 .

[0004]

[Problems to be solved by the device] However, the above-mentioned actual exploitation 59
The one described in Japanese Patent No. 27265 has a drawback that the mechanism for inserting and removing the breaker is complicated, and that the breaker mounting portion is damaged early due to the vibration generated during the breaker work. In addition, the above-mentioned actual public 48-13
Those of 121 JP, such as backhoe type
When excavating, rotate the bucket toward the vehicle body and scoop it backward
The so-called forward excavation and scooping method
To bring the tip of the arm close to the ground plane and scoop forward.
It will be necessary to do some work . When working the breaker
The chisel further protrudes from the tip of the arm
Therefore, the length in the arm direction including the chisel becomes longer . When
The roller described in the above publication has a fluid seal on the upper part inside the arm.
This fluid cylinder is installed during breaker work.
A fluid pressure drive unit (breaker) equipped with a chisel by force
Slide the chisel from inside the arm to outside the arm tip.
And project it to use . With such a configuration,
Install a fluid cylinder for slide and chisel in the chamber.
Of the arm to store the fluid pressure drive unit (breaker)
The total length is inevitably long . During breaker work
As mentioned above, the chisel protrudes from the tip of the arm.
In, Ji diesel protruding length worth Kuwawa the length of the arm direction
Will be . Included a chisel that became longer like this
Crush the chisel with the arm at a right angle to the crushing surface
In order to perform work, the height of boom ups and downs must be increased.
Become. This means that the arm is longer when working the breaker.
If it does not work, a boom with a higher boom undulation is required.
The boom is longer and needs to be larger.
Become . This makes the mechanical specifications of the mother hydraulic excavator better
If you can not respond unless you change to a large one
That is what it means . Therefore, the above-mentioned Jisei Sho 48-13121
A small and medium-sized bag with a relatively short arm
Impossible to use for hoe type hydraulic excavator
It is. Also, the description of the above-mentioned Japanese Utility Model Publication No. 48-13121
The one in which the impact reaction force of the chisel is the piston rod of the fluid cylinder.
It will be supported only by the fixing pin at the end, this part
There is a problem with durability, such as early damage . This invention has been made to improve the above conventional disadvantages, bucketing
Breaker work as needed without removing the
Can be done, especially backhoe type rear
In excavator of excavating and picking method, short arm
Even if the breaker means is built in the
Do not change, that is, change the mechanical specifications of the mother hydraulic excavator
Economically by installing breaker working means in the arm without
It is an object of the present invention to provide a hydraulic excavator having a breaker mounting structure that is excellent in structure, has a simple structure, and is robust against vibration.

[0005]

This invention has achieved the above-mentioned object.
The boom, arms and
It is pivotally attached to the tip of the arm so that it faces toward the vehicle body.
To the position for excavating and picking up and carrying,
Rotate in a direction away from the
Rear excavation scooping method with a working machine consisting of a bucket
In a hydraulic excavator, the tip of the arm is opened.
A hollow arm with a mouth and a chisel inside the hollow arm.
The hydraulic pressure drive unit that gives the striking force is built in and fixed, and the tip of the arm
Fluid drive the chisel with the chisel protruding from the end opening
From the arm mounting pin
The total length to the tip of the chisel is the maximum length between the arm and the bucket.
By being included in the range, the hydraulic pressure of the mother body
Breaker work without changing the mechanical specifications of the shovel
And bucket work .

[0006]

[Operation] With the above structure, the bucket can be removed without removing the bucket.
The breaker work can be done by attaching the zel . So
Then remove the chisel and perform the bucket work again.
You can To install the chisel, rotate the bucket.
Retract from the tip of the arm and leave the chisel attached to the arm tip side.
This is done with a gap . This mounting space is the rotation range of the bucket
Are included in . Attach a chisel to the tip of the arm
The total length from the arm mounting pin to the tip of the chisel is
So that it is almost included in the maximum length range of the arm and bucket
To increase the length of the arm or the boom
Mechanical specifications of mother hydraulic excavator such as height of undulation
Can be applied without any changes .

[0007]

Embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a hydraulic diagram of a rear excavation and scooping method according to the present invention.
It is a figure showing the bucket work using an excavator.
It In the figure, 1 is a lower traveling body of a hydraulic excavator, 2 is an upper revolving body provided on the lower traveling body 1 so as to be freely rotatable, and a working machine 3 is attached to a front portion thereof. In the working machine 3, a hollow arm 6 rotatable by an arm cylinder 12 is pivotally attached to the tip of a boom 5 which can be raised and lowered by a boom cylinder 4, and a bucket 7 is attached to the tip of the hollow arm 6. .

The bucket 7 is rotatable by a bucket cylinder 8 via a link mechanism 20 .

A breaker 10 is provided in the hollow arm 6.
The fluid pressure drive unit 10a is attached. The breaker 10 includes a fluid pressure drive unit 10a and the fluid pressure drive unit 10a.
More consists chisel 10b (not shown) projecting downward, so that the striking force is applied to the chisel 10b by striking piston (not shown) provided in the hydraulic drive unit 10a. Note that the chisel 10b is the fluid pressure drive unit 1.
It is detachably attached to the tip of 0a . In addition, 9 is
Ket tilt rod, 20 is a bucket link mechanism, 23
Is an arm mounting pin .

FIG. 2 and FIG. 3 show the working machine part of the present invention.
Fig. 2 is a diagram showing the minutes, Fig. 2 is a diagram during bucket work, and Fig. 3 is
It is a figure at the time of a breaker work . The arm 6 of the work machine 3
Inside the hollow arm 6 is a hollow arm having an open end .
The fluid pressure drive unit 10a of the breaker 10 is internally fixed. That being the built fixed in the arm 6 is flow pressure driving portion 10a of the breaker 10, chisel 10b which is vibrated by a fluid pressure driving section 10a collision from the front end opening of the arm 6
It is mounted in the removable self standing in fluid pressure drive unit 10a in a state of out has. The bucket 7 is connected to the fluid pressure in the arm 6.
The chisel 10b can be inserted and attached to the tip of the drive unit 10a.
The chisel 10b at a position offset
The bucket hinge pin 16 is rotatably attached
Attached, bucket cylinder 8 provided on arm 6, link
The intermediate link 13 of the mechanism 20 and the bucket tilt rod 9
Through and, Oh Ru is mounted so as to be able to work. 14 and 1
5 and 17 is Ri hinge pin der, arm mounting pin 23
Is .

[0011] hydraulic excavator, which is configured as described above,
Flow chisel 10b during bucket work as shown in FIG. 2
By removing from the tip of the body pressure drive unit 10a , the chisel 10b does not get in the way and the bucket work becomes possible. Also, when performing the breaker work, as shown in FIG.
Attach the chisel 10b at the tip of the pressure drive unit 10a, and may be performed bucket 7 in a state of being rotated toward the front of the arm 6, will allow the breaker work without removing the bucket 7. That is, in this invention, the arm
Hit the chisel 10b with the breaker 10 built into the 6
The length of the arm 6 is changed only by the fluid pressure drive unit 10a.
It does not require a special length for the built-in marker
An empty arm, and the chisel 10b should be built in the arm 6.
Instead, the hydraulic pressure drive inside the arm each time the breaker work is performed.
The length of the arm 6 can be increased by mounting it on the portion 10a.
It does not do it, but it is assumed to be relatively short . Also,
Place the arm 6 with a built-in breaker on the tip side of the arm
Operate downwards to raise the movable range across the tip of the arm.
As a backhoe type hydraulic excavator arm 6
Therefore, when not using the bucket, the bucket movable range
The enclosure can be used as a mounting part for the chisel 10b.
Position the chisel 10b on the mounting part of the
The total length from the attachment pin 23 to the tip of the chisel 10b is
The maximum length of the bucket and bucket.
With this configuration, the boom can be raised.
Change the mechanical specifications of the mother hydraulic excavator without changing the probing height
You don't have to . And when working on a bucket,
It is possible to remove the rule 10b .

[0012]

As described in detail above, the present invention enables breaker work without removing the bucket, thus eliminating the need for bucket and breaker replacement work.
It is possible to improve work efficiency when converting to breaker work. And hit the chisel in the arm
Since only the fluid pressure drive unit is fixed internally, the arm length is
The relatively short arm length of an existing hydraulic excavator is sufficient,
There is no change in the specifications of the bucket work range
Can be used for both tasks . Also shake the chisel
Every time you work with the
Used by mounting it on the body pressure drive unit and removing it during bucket work
Because the way, Bakkuhota scheme narrowing have behind drilling scooping
Applicable to hydraulic excavator
Even if the chisel is pushed out into the space of the
No need to change specifications of bell work, which is very economical
Target . Therefore, according to this invention, the structure is simple and
The mounting part should be damaged early even for the vibrating part during work.
There is no such thing as a small arm size with a small backhoe.
Very suitable for short hydraulic excavators .

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is a diagram when performing the bucket work of the present invention.
It

FIG. 3 is a diagram when the breaker work of this invention is performed.
It

FIG. 4 is a side view showing a conventional hydraulic excavator.

[Sign clearing]

2 Upper revolving structure 3 Working machine 5 Boom 6 Arm 7 Bucket 10 Breaker 10a Fluid pressure drive unit 10b Chisel 23 Arm mounting pin

Claims (1)

[Scope of utility model registration request] 1. A boom, an arm and an arm are provided at the front of the upper swing body.
Rotatably pivotally attached to the front end of the boom, toward the vehicle body
It turns to the posture of excavating and picking up and carrying,
Rotate away and change to the discharging posture of the scooped material
Rear excavation and scooping method with working equipment consisting of buckets
In the hydraulic excavator, the tip of the arm is opened.
A hollow arm, and hit the chisel inside the hollow arm.
A fluid pressure drive unit that gives impact force is built in and fixed, and the tip of the arm
Fluid pressure drive the chisel with the chisel protruding from the end opening.
Attach it to the moving part in a detachable manner,
The maximum length between the arm and the bucket is the total length from the tip of the chisel to the tip of the chisel.
By being included in the range of
Breaker operation without changing the mechanical specifications of the pressure shovel
It is characterized by being able to do work and bucket work
Hydraulic excavator.