JP3260625B2 - Shovel 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 shovel excavator which can be used for both a loading shovel operation and a backhoe operation by changing a work attachment.

[0002]

2. Description of the Related Art At the site of excavation work, if there is a shovel excavator capable of performing both loading shovel work and backhoe work, it is convenient and economical because any one work can cope with any work as needed. It is a target.

A shovel excavator that can be used for both a loading shovel operation and a backhoe operation is based on a shovel excavator equipped with a backhoe attachment, and a backhoe bucket that can be turned back and forth to make a face shovel or loading. Some are designed to perform shovel-like work.

[0004] However, this excavator is based on a shovel excavator equipped with a backhoe attachment, and is inefficient for loading shovel work because the inverted bucket used is small. Since the range of movement of the boom is long, the workability is poor for use in underground work such as tunnel excavation.

A shovel excavator equipped with a loading shovel attachment may be used as a base, and a backhoe bucket may be assembled instead of the loading shovel bucket. However, as shown in FIG. 6, a conventional loading shovel attachment 50 is provided. In the shovel excavator 51, a loading shovel bucket 52 is provided.
Since the loading shovel bucket cylinder 53 for tilting the backhoe is provided below the arm 54, if the backhoe bucket is assembled as it is, it will hinder lower excavation during backhoe work, and the pressure receiving area during excavation is small. Excavation force is small because the reduced side is used.

Although it is possible to completely replace the loading shovel attachment and the backhoe attachment, it is not easy and uneconomical to replace the entire attachment.

[0007]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems in a shovel-based excavator. The present invention is based on a shovel-based excavator equipped with a loading shovel attachment, and the loading shovel attachment can be easily backhoeed. Can be converted to attachments,
An object of the present invention is to provide a shovel excavator capable of efficiently performing both a loading shovel operation and a backhoe operation.

[0008]

According to the present invention, in a shovel type excavator equipped with a loading shovel attachment including a boom, an arm, and a loading shovel bucket as a work attachment, the loading shovel bucket is provided with a second arm and a backhoe. By combining with a backhoe assembly consisting of a bucket, the loading shovel attachment
It is configured to be converted to a backhoe attachment.

In the present invention, instead of directly attaching the backhoe bucket to the arm instead of the loading shovel bucket, the loading shovel bucket is replaced with a backhoe assembly including a second arm and a backhoe bucket. Accordingly, both loading shovel work and backhoe work can be performed efficiently.

The boom of the loading shovel attachment is a short boom, so that the posture of the boom and the arm can be adapted to a narrow space even in a narrow work site such as a mine, and the workability can be improved.

[0011] The loading shovel bucket bucket cylinder for tilting the loading shovel bucket,
By arranging it on the upper side of the arm, the backhoe work is not hindered by lower excavation, and the power can be effectively used, which is suitable for driving the backhoe attachment.

A push button switch for switching a boom or an arm to be operated when operating the backhoe attachment is provided on the grip of the work operation lever for operating the work attachment, so that the boom to be operated during the backhoe operation is provided. Alternatively, the arm can be easily selected and the operability is improved.

[0013]

FIG. 1 is a side view of a shovel-type excavator equipped with a loading shovel attachment according to an embodiment of the present invention, and FIG. 2 is a shovel-type excavator showing a state where the loading shovel attachment is converted to a backhoe attachment. FIG. 3 is an explanatory view of a working posture of a loading shovel attachment at a work site in a tunnel, and FIG. 4 is an explanatory diagram of a work posture of a backhoe attachment at a work site in a tunnel.

Referring to FIG. 1, a shovel excavator 1 includes a vehicle body 4 having a lower traveling body 2 and an upper revolving superstructure 3.
As a working attachment, a loading shovel attachment 8 including a boom 5, an arm 6, and a loading shovel bucket 7 is provided.

In this loading shovel attachment 8, the boom 5 is a short boom that is shorter than the boom of a normal loading shovel attachment for use in a mine, and has a base end pivotally supported by the upper revolving unit 3 and an upper swing. Boom cylinder 1 provided between body 3
5 makes it possible to rotate back and forth. The arm 6 has a length sufficient to secure a working range, and has a base end pivotally attached to a distal end of the boom 5 and is vertically moved by an arm cylinder 16 provided between the arm 6 and the upper swing body 3. It is rotatable.

The loading shovel bucket 7 has a base end pivotally connected to a tip end of the arm 6 and a bucket link 13.
It can be tilted by a loading shovel bucket cylinder 17 provided between the arm 6 and the arm 6 via the bell crank 12. Here, the loading shovel bucket cylinder 17 is disposed above the arm 6.

The loading shovel attachment 8 includes a loading shovel bucket 7 and a second arm 21 and a backhoe bucket 22 as shown in FIG.
By being recombined with the backhoe assembly 20 consisting of:

The second arm 21 has an arm 6 at the center.
And is rotatable back and forth by a loading shovel bucket cylinder 17 mounted on a base end thereof. The backhoe bucket 22 has a base end pivotally connected to the distal end of the second arm 21 and can be tilted by a backhoe bucket cylinder 24 provided between the backhoe bucket 22 and the second arm 21 via a backhoe bucket link 23.

The shovel excavator 1 equipped with the loading shovel attachment 8 installs the vehicle body 4 near the face and loads the shovel bucket 7 by lowering the arm 6 when performing the loading shovel work at the site inside the tunnel 10. The boom 5 is pushed forward according to the scooping position, and the rock is scooped into the loading shovel bucket 7. Then raise the arm 6 and boom 5
, The upper swing body 3 is swung, the loading shovel bucket 7 is moved to above the truck 11, the bottom dump is opened, and the rock is loaded on the truck 11.

At this time, since the boom 5 of the loading shovel attachment 8 is a short boom, the posture of the boom 5 and the arm 6 can be adapted to the sectional shape of the tunnel 10 as shown in FIG. The workability is good without colliding with the side wall and the like.

When performing the backhoe operation, the loading shovel bucket 7 is moved to the backhoe assembly 20.
After converting the loading shovel attachment 8 to the backhoe attachment 9, the boom 5 is pushed forward, the arm 6 is lowered, and the tip side of the second arm 21 is pulled toward the front to lower the lower plate 10 </ b> B of the tunnel 10 to the backhoe bucket. Excavate at 22.

Then, the arm 6 is raised, the boom 5 is pulled backward, the upper swing body 3 is swung, and the second arm 2 is swung.
1 and push the backhoe bucket 22 into the truck 1
Then, the rock excavated and dumped is loaded on the truck 11.

Also at this time, since the boom 5 is a short boom, as shown in FIG.
The posture of the second arm 21 can be adapted to the sectional shape of the tunnel 10, and the backhoe attachment 9 is
Workability is good without colliding with the ceiling or side wall of the vehicle.

Loading shovel bucket cylinder 1
Since the arm 7 is disposed above the arm 6, it does not hinder lower excavation during backhoe work, and uses the extension side having a large pressure receiving area during excavation, thereby increasing the excavation force.

When the loading shovel work and the backhoe work are performed, work operation levers 26 and 27 are provided on the left and right sides of the driver's seat 25 as shown in FIG.

The operation of the operation levers 26 and 27 is selected by moving the lever from the neutral position back and forth and left and right. In the loading shovel work, the work operation lever 26 on the left side raises the arm 6 when tilted forward, lowers the arm 6 when tilted backward, tilts the upper revolving structure 3 right when tilted rightward, and tilts the upper revolving body 3 leftward. The upper swing body 3 turns left. When the work operation lever 27 on the right side is tilted forward, the boom 5 is pushed forward, when it is tilted backward, the boom 5 is pulled back, when it is tilted to the right, the loading shovel bucket 7 is dumped, and when it is tilted to the left, the loading shovel is loaded. The bucket 7 tilts.

A push button switch (not shown) is provided on the grips 28, 29 of the work operation levers 26, 27. When the push button switch of the work operation lever 27 on the right side is pressed, the loading shovel bucket 7 is pressed. When the push button switch of the left operation control lever 26 is pressed, the bottom dump of the loading shovel bucket 7 is closed.

In the backhoe operation, the arm 6 is raised when the left operation lever 26 is tilted forward, the arm 6 is lowered when tilted rearward, and the upper revolving body 3 is tilted when tilted right.
Turns to the right, and when tilted to the left, the upper swing body 3 turns to the left. When the work operation lever 27 on the right side is tilted forward, the boom 5 is pushed forward, when it is tilted backward, the boom 5 is pulled back, when it is tilted to the right, the backhoe bucket 22 is dumped, and when it is tilted to the left, the backhoe bucket 22 is dumped. Tilts.

However, since the second arm 21 is provided on the backhoe attachment 9 at the time of the backhoe operation, the operation of the second arm 21 can be achieved only by operating the operation levers 26, 27 to the front, rear, left and right. Can not.

Therefore, the operation between the boom 5 and the second arm 21 can be switched by using a push button switch on the grip 29 of the work operation lever 27 on the right side. That is, when the work operation lever 27 on the right side is tilted forward, the boom 5 is pushed forward, when it is tilted backward, the boom 5 is pulled back, and when it is tilted forward while pressing the push button switch, the second arm 21 is moved forward. When pushed out and tilted backward while pressing the push button switch, the second arm 21 is pulled backward. When the push button switch is pressed once and the work operation lever 27 is tilted forward, the second arm 21 is pushed forward, and when the work arm is tilted backward, the second arm 21 is pulled rearward, and the push button switch is pressed again to switch over again. When the boom 5 is pushed forward, the boom 5 is pushed forward, and when it is pushed backward, the boom 5 is pulled back.

As described above, by switching using the push button switch, the boom 5 to be operated and the second arm 21 can be easily selected, so that the operability is improved.
Note that the correspondence between the operation of each part of the backhoe attachment 9 and the operation direction of the work operation levers 26 and 27 during the backhoe operation is not limited to this.

For example, when the left operation lever 26 is
When it is pushed forward, the second arm 21 is pushed forward,
When tilted backward, the second arm 21 is pulled rearward, when tilted rightward, the upper swing body 3 swings right, and when tilted leftward, the upper swing body 3 swings leftward. Boom 5 is pushed forward when tilted forward,
Boom 5 is pulled back when tilted rearward, and arm 6 is lowered when tilted forward while pressing the push button switch,
Pushing the push button switch and tilting it backwards, arm 6
The backhoe bucket 22 may be dumped when tilted to the right, and tilted when tilted to the left.

[0033]

As described above, the excavator-based excavator of the present invention can be used for loading shovel work by changing the attachment for work as required.
It can also be used for backhoe work.

In the present invention, instead of directly attaching the backhoe bucket to the arm in place of the loading shovel bucket, the loading shovel bucket is replaced with a backhoe assembly including a second arm and a backhoe bucket. Accordingly, both loading shovel work and backhoe work can be performed efficiently.

By making the boom of the loading shovel attachment a short boom, the posture of the boom and the arm can be adapted to a narrow space even in a narrow work site such as in a mine, and the workability can be improved.

By disposing the loading shovel bucket cylinder for tilting the loading shovel bucket above the arm, it does not hinder lower excavation during backhoe work, and the power can be effectively used. Therefore, the backhoe attachment is driven. It becomes suitable.

A push button switch for switching a boom or an arm to be operated when operating the backhoe attachment is provided on the grip of the work operation lever for operating the work attachment, so that the boom to be operated during the backhoe operation is provided. Alternatively, the arm can be easily selected and the operability is improved.

[Brief description of the drawings]

FIG. 1 is a side view of a shovel-based excavator equipped with a loading shovel attachment showing an embodiment of the present invention.

FIG. 2 is a side view of the shovel excavator showing a state where a loading shovel attachment is converted into a backhoe attachment.

FIG. 3 is an explanatory diagram of a working posture of a loading shovel attachment at a work site in a tunnel.

FIG. 4 is an explanatory diagram of a working posture of a backhoe attachment at a work site in a tunnel.

FIG. 5 is a perspective view of a driver's seat of the shovel excavator.

FIG. 6 is a side view of a shovel-based excavator equipped with a conventional loading shovel attachment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Excavator type excavator 2 Lower traveling body 3 Upper revolving structure 4 Vehicle body 5 Boom 6 Arm 7 Loading shovel bucket 8 Loading shovel attachment 9 Backhoe attachment 10 Tunnel 11 Truck 12 Bell crank 13 Bucket link 15 Boom cylinder 16 Arm cylinder 17 Loading shovel Bucket cylinder 20 Backhoe assembly 21 Second arm 22 Backhoe bucket 23 Backhoe bucket link 24 Backhoe bucket cylinder 25 Driver's seat 26 Work operation lever 27 Work operation lever 28 Grip 29 Grip

Claims (4)

(57) [Claims] 1. A shovel excavator equipped with a loading shovel attachment including a boom, an arm, and a loading shovel bucket as a work attachment, wherein the loading shovel bucket is provided with:
A shovel excavator in which a loading shovel attachment is converted into a backhoe attachment by recombining with a backhoe assembly consisting of a second arm and a backhoe bucket. 2. The boom according to claim 1, wherein the boom is a short boom.
An excavator-based excavator according to the description. 3. The excavator according to claim 1, wherein the loading shovel bucket cylinder for tilting the loading shovel bucket is disposed above the arm. 4. A push button switch for switching a boom or an arm to be operated when operating a backhoe attachment, is provided on a grip of a work operation lever for operating a work attachment. Item 4. A shovel excavator according to Item 3.