JPH08177075A - Hydraulic shovel with built-in breaker type arm - Google Patents

Abstract

PURPOSE: To enhance the workability, by providing a U-shaped notch in a bucket and separating a bucket link to form a two-way so as to pass a breaker chisel on working the bucket and freely rotate it. CONSTITUTION: Since a bucket 6 becomes rotatable from the tilt side to the dump side and vice versa, the bucketting works can be carried out while a breaker chisel 10 is set. In the case of breaking works, the bucket is shifted to either the tilt side or the dump side in accordance with the construction site. In the case of a breaking work by a wall, the chisel 10 at the tilt side is positioned close to the wall to increase the breaking quantity to the vicinity of the wall and also increase the penetration depth of the chisel 10. Even when the bucket 6 is operated by mistake while equipped with the chisel, the bucket does not get in contact with the chisel. In this way, the working efficiency is increased and the device is prevented from damage even when it is operated by mistake.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hydraulic excavator with a built-in breaker, and more particularly, by improving the shape of the bucket, it is possible to perform bucket work with the breaker chisel attached and also have a breaker with a built-in breaker. Hydraulic excavator with arm.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 7, a hydraulic excavator has a vehicle body 1 including a lower traveling body 1a and an upper revolving body 1b.
Is equipped with a work machine including a boom 2, a boom cylinder 3, an arm 4, an arm cylinder 5, a bucket 6, a bucket cylinder 7, a bucket link 8, an intermediate link 9 and the like, and is used in all fields including excavation work. It is used. In this hydraulic excavator, there is a specification recently equipped with a breaker built-in type arm 4a configured by incorporating a breaker body inside the arm instead of the arm 4 shown in FIG. The hydraulic excavator equipped with the arm 4a having a built-in breaker is capable of performing the breaker work without attaching the chisel 10 built in the arm 4a having a built-in breaker, in addition to the usual bucket excavation work. .

FIG. 7 is proposed for the purpose of saving labor in man-hours for exchanging attachments. In this example, when the breaker work is performed in addition to the normal excavation work using the bucket, the chisel 10 is attached while the bucket 6 is being operated on the dump side, so that the bucket and the breaker main body, which have been conventionally used, are separated from each other. Exchange, ie
By saving the work of installing the breaker body prepared as an attachment, and enabling the breaker work only by the work of attaching the chisel, the man-hours are saved. As another example, as shown in FIG. 8, a method of expanding the work range is proposed. In this example, a long crushing residue or penetration of the chisel 10 corresponding to the distance l1 with the wall at the time of wall work as shown in FIG. 9 which was a problem when mounting the chisel 10 with the bucket 6 operated on the dump side This is intended to improve the limit of the depth h1.

[0004]

However, the above-mentioned prior art has the following problems.

In a conventional hydraulic excavator equipped with a breaker built-in arm as shown in FIG. 7, the chisel can be attached only when the bucket is on the dump side when performing the breaker work. Therefore, as shown in FIG. 9, when the chisel is made vertical during the wall-side work, since the bucket cylinder is contracted to operate the bucket toward the dump side, there is a long crushing residue corresponding to the distance to the wall. There was a problem that the penetration depth of the chisel was limited to. In order to avoid this problem, it was necessary to remove the bucket and carry out the crushing work. Further, since bucket work cannot be performed with the chisel attached to the breaker, it is necessary to remove the chisel when performing bucket work.

Further, as shown in FIG. 8, when the chisel is attached to the breaker built-in arm with the bucket in the tilt position, the problem shown in FIG. 9 is solved.
Since the bucket work cannot be performed with the chisel still attached to the breaker, it is necessary to remove the chisel when performing the bucket work. Also, if you operate the bucket by mistake with the chisel attached, the chisel may break or
The problem is that the bucket is damaged.

The present invention focuses on the above-mentioned problems of the prior art, and relates to a hydraulic excavator with a breaker built-in arm, and particularly to a bucket, a bucket link for driving the bucket, and a tip of the breaker built-in arm. The purpose of the present invention is to provide a hydraulic excavator with a built-in breaker arm that allows for work with a bucket and a chisel by ensuring a specified gap when the bucket is activated while the chisel is still attached, and with good workability and maintainability. There is.

[0008]

In order to achieve the above object, a first invention of a hydraulic excavator with a breaker built-in type arm of the present invention is a hydraulic excavator, which has a boom and a built-in breaker pivotally attached to the tip of the boom. Type arm, an arm cylinder pivotally mounted between the breaker built-in type arm and the boom, a bucket provided by fixing one end of a pair of bucket brackets to a bracket provided at the tip of the breaker built-in type arm, and one end A pair of bucket links pivotally attached to the bucket bracket, the other end of which is pivotally attached to an intermediate link, an end link to a bracket provided at the tip of the breaker built-in type arm, and an other end pivotally attached to the bucket link. , One end to an arm with a built-in breaker, the other end to an intermediate link, and a bucket cylinder connected to the bucket link. Tsu DOO has a notch of a predetermined distance through which chisel to attached to the breaker built-arm, and,
It is characterized in that the bucket side of the bucket link is divided into two-forked forks.

According to a second aspect of the present invention, there is provided a boom pivotally attached to the hydraulic excavator, a breaker built-in arm pivotally attached to the boom tip, an arm cylinder pivotally attached between the breaker built-in arm and the boom, and the breaker. A bucket in which one end of a pair of bucket brackets is fixed and pivotally attached to a bracket provided at the tip of the built-in arm, and a pair of bucket links in which one end is pivotally attached to the bucket bracket and the other end is pivotally attached to an intermediate link, One end was connected to a bracket provided at the tip of the breaker built-in type arm, the other end was connected to the intermediate link pivotally attached to the bucket link, one end was connected to the breaker built-in arm, and the other end was connected to the intermediate link and the bucket link. A bucket cylinder, the bucket having notches at predetermined intervals through which the chisel attached to the breaker built-in arm passes, and Characterized in that it is a pair of bucket links being split.

[0010]

According to the above construction, in a hydraulic excavator having a built-in breaker arm, a U-shaped cutout is provided in the bucket so that the breaker chisel mounted at the tip of the breaker built-in arm can pass during bucket work. Similarly, since the bucket side of the bucket link is divided into a bifurcated fork so that the breaker chisel can pass through, the bucket can be rotated from the tilt side to the dump side or from the dump side to the tilt side. Therefore, the breaker work and the bucket work can be performed with the breaker chisel attached.

Similarly, since the bucket is provided with a U-shaped notch and the bucket link is divided into two, the bucket can be rotated. Therefore, the breaker work and the bucket work can be performed with the breaker chisel attached. In addition, the bucket can be moved to either the dump side or the tilt side with the breaker chisel attached, and can be stopped at that position, so the chisel on the tilt side can be brought close to the wall. In the wall-side crushing work, it is possible to increase the amount of crushing up to the wall side or the amount of penetration of the chisel near the wall. Even if the bucket is accidentally operated with the breaker chisel still attached, the bucket does not come into contact with the breaker chisel.

[0012]

Embodiments of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a side view showing essential parts of the present invention such as a chisel mounting portion of a breaker built-in arm, a notch portion of a bucket, and a bifurcated fork-shaped bucket link portion in a hydraulic excavator according to a first embodiment of the present invention. FIG. 2 is a Z view of FIG. FIG. 3 is a side view showing essential parts of the present invention such as a chisel mounting portion of a breaker built-in arm, a bucket notch portion, and a split bucket link portion in a hydraulic excavator according to a second embodiment of the present invention. FIG. 4 is a W view of FIG. Figure 5
FIG. 6 is a view of a bucket having a notch. FIG. 6 is a view showing a state in which the bucket is operated with the chisel attached. It should be noted that the same parts as those in FIGS.

In the hydraulic excavator of the first embodiment of the present invention shown in FIG. 1, the chisel 1 is attached to the breaker built-in arm 4a.
It has a front cap 11 for attaching 0. The front end of the front cap 11 is provided with a bracket 11a offset from the axis of the chisel 10.
As shown in FIG. 2, the bracket 11a has a bucket 6
Bucket brackets 6b, 6b, which are fixed to A and are juxtaposed at intervals, are connected by a bucket hinge pin 12, and the bucket hinge pin 12 serves as a pivot fulcrum of the bucket 6A. A bucket link 8 is connected to the bucket brackets 6b and 6b near the bucket by a bucket link pin 13. The bucket link pin 13 is separated into bucket brackets 6b, 6b which are separated from each other, and the other end side 8b is separated into the following bifurcated fork shape,
8b is attached automatically by turning. Therefore, the bucket link pin 13 does not interfere with the chisel 10.

The bucket link 8 is, as shown in FIG.
Both ends are divided into a bifurcated fork shape, and one of the smaller divided ends 8a, 8a is a bucket cylinder rod 7.
a is a bucket cylinder top pin 14, and the other end side 8b, 8b, which is largely divided into a forked shape, is provided with bucket brackets 6b, 6b.
Are joined by. At this time, the small-divided ends 8a, 8a on one end side may be integrated when the mating bucket cylinder rod 7a is divided into a bifurcated fork shape. Bucket link 8 bifurcated forks 8b, 8
The position 8c and the tapered surface 8d divided into b have a predetermined distance (M) with respect to the chisel 10 when the bucket 6A rotates about the bucket hinge pin 12 in the tilt direction (T), Moreover, the chisel 10 is arranged between the bucket links 8b, 8b which are divided into two-forked forks.

The intermediate link 9a has an intermediate link pin 15 at one end of the bracket 11a provided on the breaker built-in arm 4a, and the other end of the intermediate link 9a divided into the tip of the bucket cylinder rod 7a and the bucket link 8.
a and 8a are connected by a bucket cylinder top pin 14. The bucket 6A includes a bucket bracket 6b,
One end of 6b is connected to the bucket link 8 by the bucket hinge pin 12 and one end near the bucket is connected to the bucket link 8 by the bucket link pin 13, and the bucket cylinder 7 is actuated to rotate about the bucket hinge pin 12.
In this bucket 6A, as shown in FIG. 2 and FIG.
The bucket has a U-shaped notch 6c at a predetermined position (P) through which the chisel 10 passes at the center position of the bucket. This notch 6c
The length (N) of the bucket 6A is the bucket hinge pin 1
When pivoting about 2, the tip 10 of the chisel 10
It is provided up to a position having a predetermined interval that does not interfere with a.

Next, the operation of the above structure will be described. In FIG. 5, when performing the breaker work from the excavation work, the bucket cylinder 7 is extended and the bucket 6A is operated to the tilt side according to the work site, or the bucket cylinder 7 is contracted to move the bucket 6A. Either operate on the dump side or do either. At this time, the bucket 6A can be rotated about the bucket hinge pin 12 with the chisel 10 still attached, and can be stopped at any position in the rotation range. Therefore, the stop position of the bucket 6A can be selected according to the work site, so that the work can be performed at any of the positions shown in FIGS. 8 and 9 and the work range is expanded.

With reference to FIGS. 3 and 4, a breaker built-in arm in a hydraulic excavator according to a second embodiment of the present invention will be described. In the first embodiment, the bucket link 8
As shown in FIG. 2, the two end sides are divided into bifurcated forks, but in the second embodiment, a pair of separate bucket links 20, 20 are used. Figure 3,
In FIG. 4, one end side 20 of the bucket links 20, 20
a is bucket cylinder rod 7a and intermediate link 9a
With the bucket cylinder top pin 14 and the other end side 2
0b is connected to the bucket brackets 6b and 6b by a bucket link pin 13. The distance between the pair of bucket links 20 is a predetermined distance (M) with respect to the chisel 10.
And the chisel 10 has a pair of bucket links 2
It is arranged between 0 and 20. Similar to the first embodiment, the bucket 6A has notches 6c at predetermined intervals through which the chisel 10 passes at the center position of the bucket.

According to the above configuration, even when the bucket 6A is rotated about the bucket hinge pin 12 in the tilt direction (T), it does not interfere with the bucket link 20.

[0019]

According to the present invention, the bucket can be rotated in any direction from the tilt side to the dump side, as shown in FIG. As a result, breaker work and bucket work can be performed with the breaker chisel attached, which improves work efficiency. In the present invention, since the U-shaped cutout is provided in the bucket, fine things fall from the gap of the cutout part, but the thing scooped with the bucket when the chisel is attached is mainly a rock piece, so the problem of falling is There is no. Further, even if the bucket is accidentally operated when the chisel is attached, the chisel and the bucket do not interfere with each other and damage can be prevented.

[Brief description of drawings]

FIG. 1 is a side view showing essential parts of the present invention such as a chisel mounting portion of a breaker built-in arm, a notch portion of a bucket, and a bifurcated fork-shaped bucket link portion in a hydraulic excavator according to a first embodiment of the present invention.

FIG. 2 is a Z view of FIG.

FIG. 3 is a side view showing essential parts of the present invention such as a chisel mounting portion of a breaker built-in arm, a notch portion of a bucket, and a split bucket link portion in a hydraulic excavator according to a second embodiment of the present invention.

FIG. 4 is a W view of FIG. 3.

FIG. 5 is a perspective view of a bucket having a cutout according to the present invention.

FIG. 6 is a view showing a state in which the bucket is operated with the chisel attached.

FIG. 7 is an overall side view illustrating a conventional hydraulic excavator.

FIG. 8 is a view showing a conventional technique, and is a side view in which a chisel is attached in a state where a bucket is operated to a tilt side.

FIG. 9 is a view showing a conventional technique, and is a side view illustrating a limit of breaker work in a state where a bucket is operated to a dump side.

[Explanation of symbols]

1 ... Hydraulic excavator body, 1a ... Crawler track, 1b ... Car body, 2 ...
Boom, 3 ... Boom cylinder, 4a ... Breaker built-in arm, 5 ... Tilt cylinder, 6, 6A ... Bucket, 6b
... bucket bracket, 6c ... notch, 7 ... bucket cylinder, 8a ... bucket link, 9a ... intermediate link, 1
0 ... Chisel, 11 ... Front cap 11a ... Bracket, 12 ... Bucket hinge pin 13 ... Bucket link pin, 14 ... Bucket cylinder top pin, 15 ... Intermediate link pin, W ... Wall.

Claims (2)

[Claims] 1. A boom pivotally attached to a hydraulic excavator, a breaker built-in arm pivotally attached to the boom tip, an arm cylinder pivotally attached between the breaker built-in arm and the boom, and a breaker built-in arm tip. A bucket provided with one end of a pair of bucket brackets fixed and pivotally attached to a bracket provided at the one end; a pair of bucket links having one end pivotally attached to the bucket bracket and the other end attached to an intermediate link; and one end of the breaker. The bracket provided at the tip of the built-in arm has an intermediate link whose other end is pivotally attached to the bucket link, one end to the breaker built-in arm, the other end to the intermediate link, and a bucket cylinder connected to the bucket link. The bucket has notches at predetermined intervals through which the chisel attached to the breaker built-in arm passes, and the bucket link Hydraulic excavator with a built-in breaker, characterized in that the bucket side is divided into two forks. 2. A boom pivotally attached to the hydraulic excavator, a breaker-incorporated arm pivotally attached to the boom tip, an arm cylinder pivotally attached between the breaker-incorporated arm and the boom, and a breaker-incorporated arm tip. A bucket provided with one end of a pair of bucket brackets fixed and pivotally attached to a bracket provided at the one end; a pair of bucket links having one end pivotally attached to the bucket bracket and the other end attached to an intermediate link; and one end of the breaker. The bracket provided at the tip of the built-in arm has an intermediate link whose other end is pivotally attached to the bucket link, one end to the breaker built-in arm, the other end to the intermediate link, and a bucket cylinder connected to the bucket link. The bucket has notches at a predetermined interval through which the chisel attached to the breaker built-in arm passes, and is divided into two. Hydraulic excavator with a built-in breaker, which is a pair of bucket links.