JP2593024Y2 - Hydraulic excavator work machine - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hydraulic excavator working machine capable of drilling a horizontal hole below a structure.

[0002]

2. Description of the Related Art Hydraulic power shovels are widely used for the extraction of gravel and soil, road construction, field maintenance, land reclamation, water and sewage works, and building foundation works. Water and sewage piping, gas piping, U
Excavation and leveling below the gutters or girder supporting the retaining walls without damaging them is increasing exponentially.
When the above-mentioned operation is performed using a hydraulic excavator, the arm or boom of the excavator may hit the existing structure and damage the existing structure, and only the entrance of the side hole to be excavated can be mechanically excavated. I have to rely on.

[0003]

As means for solving the above-mentioned problems, a turning bucket hand for a power shovel has been proposed in Japanese Patent Application Laid-Open Nos. 3-166424 and 3-176514. However, even when the turning bucket hand is used, deep hole excavation cannot be performed. On the other hand, the work by human power is a troublesome work because the worker has to continue excavation in a leaning posture, and the work efficiency is not improved. The present invention has been made in view of the above-mentioned conventional problems, and provides a hydraulic power shovel working machine capable of excavating and leveling an underground object or a girder without damaging the underground object or the like, without damaging it. It is intended to be.

[0004]

Means for Solving the Problems To achieve the above object, the construction of the working machine of the hydraulic excavator according to the present invention is as follows. An arm pivotally attached to the tip of the boom, a slide arm pivotally attached to the tip of the arm, and extending and contracting by driving a telescopic cylinder; And a bucket freely mounted on the shaft. (2) In the configuration of the above (1), the slide arm is
A base arm, a telescopic cylinder embedded in the base arm along the axis of the base arm, an arm body covering the base arm and the piston rod of the telescopic cylinder, and sliding along an outer surface of the base arm; and the arm body And a bucket driving link mechanism attached to the outer surface of the driving mechanism. (3) In the configuration of the above (1), the slide arm
It is constituted by an arm body composed of a hydraulic cylinder, a bucket cylinder and a bucket driving link mechanism attached to the outer surface of the arm body, and a bucket is axially mounted on a bottom end of the hydraulic cylinder. (4) In the configuration of (2) or (3), the slide arm cylinder for swinging the slide arm and the link mechanism for driving the slide arm include a bucket cylinder and a link mechanism for driving bucket mounted on the outer surface of the arm body. It is characterized by being the same. (5) The configuration according to the above (1) or (2), wherein the arm has an offset mechanism in the left-right direction.

[0005]

According to the above construction, the bucket is axially mounted on the tip of the arm of the hydraulic power shovel via the slide arm which expands and contracts by driving the telescopic cylinder. By operating the bucket while driving, it is possible to easily perform horizontal excavation and leveling work under the buried object underground. Since the arm has an offset mechanism in the left-right direction, the lateral width to be excavated can be increased. In the slide arm, the tip end on which the bucket is pivotally mounted is covered with the arm body, or a hydraulic cylinder is used as the slide arm, and the bucket is pivotally mounted on the bottom end of the hydraulic cylinder. There is almost no risk of biting. Also, the slide arm cylinder for swinging the slide arm and the link mechanism for driving the slide arm are the same as the bucket cylinder and the link mechanism for driving the bucket mounted on the outer surface of the slide arm main body. The work of replacing the bucket, which occurs with the above, can be easily performed. Furthermore, since the arm has an offset mechanism in the left-right direction, the horizontal width of horizontal excavation and leveling work below the underground object can be easily widened.

[0006]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a hydraulic power shovel according to an embodiment of the present invention;
FIG. 1 is a schematic side view of a working machine of a hydraulic power shovel according to claims 1, 2 and 4, showing a state where the working machine is lowered into a vertical hole provided between cut beams. FIG. 2 is a cross-sectional view showing a schematic structure of the slide arm, and FIG. 3 is a schematic side view of the working machine when a horizontal hole excavation posture is taken. In these figures, a boom 1 is pivotally mounted on an upper swing body 2 of a hydraulic power shovel, and is configured to be raised and lowered by a boom cylinder 3.

An arm 6 is pivotally attached to the end of the boom 1 and a slide arm 7 is pivotally attached to the end of the arm 6. Reference numeral 8 denotes an arm cylinder for swinging the arm 6. The slide arm 7 includes a slide arm cylinder 9 and a slide arm driving link mechanism 10.
Swings in the front-back direction. A bucket 11 is pivotally mounted on the tip of the slide arm 7.
Numeral 1 swings back and forth by a bucket cylinder 12 and a link mechanism 13 for driving a bucket. The bucket cylinder 12 is the same as the slide arm cylinder 9, and the bucket driving link mechanism 13 is the same as the slide arm driving link mechanism 10. Therefore, when the slide arm 7 is detached from the arm 6 and the bucket 11 is directly attached to the tip of the arm 6, the slide arm cylinder 9 is used as a bucket cylinder and the slide arm drive link mechanism 10 is used as a bucket drive link mechanism. can do.

As shown in FIG. 2, the slide arm includes a base arm 7a pivotally mounted on the tip of the arm 6, a telescopic cylinder 14 embedded in the base arm 7a along the axis of the base arm 7a, and the base arm 7a. Arm 7a
And the piston rod 1 of the telescopic cylinder 14
An arm body 7b which covers the base body 7a and slides along the outer surface of the base arm 7a. The bucket cylinder 12 and the bucket driving link mechanism 1 are provided on the outer surface of the arm body 7b.
3 is provided. The telescopic cylinder 14
, The entire cylinder portion is embedded in the base arm 7a, and the tip of the piston rod 14a is connected to the inner surface of the tip of the arm body 7b. A bucket 11 is mounted on the outer surface of the distal end of the arm body 7b. A dust seal 1 is provided at the rear end opening of the arm body 7b to prevent earth and sand from entering the gap between the base arm 7a and the arm body 7b.
5 is fitted.

Next, about the horizontal hole digging by this working machine,
The case where the lower side of the cut beam is excavated in the horizontal direction will be described as an example. In FIG. 1, reference numeral 20 denotes a cross section of a cutting beam for supporting the upright of the sheet pile. First, boom 1
Is lowered, and the bucket 11 is operated with the arm 6 and the slide arm 7 being substantially perpendicular to excavate a vertical hole between the cut beams 20.

After excavating the vertical hole, as shown in FIG. 3, the boom 1 is further lowered, and the slide arm cylinder 9 is driven so that the slide arm 7 is horizontal or almost horizontal while the arm 6 is kept vertical. Thereafter, the telescopic cylinder 14 shown in FIG. 2 is driven and the bucket 11 is operated while the arm body 7b is slid in the front-rear direction.
Perform horizontal excavation or leveling work below.

FIG. 4 shows the first, third and fourth aspects of the present invention.
It is a side view of the slide arm based on. The slide arm 16 is composed of a hydraulic cylinder, and a bracket 16b having a pin hole for connecting the arm 6 and a pin hole for connecting the slide arm driving link mechanism 10 is provided at the tip of a piston rod 16a of the hydraulic cylinder. The exposed portion of the piston rod 16a is covered with a bellows 17. A bucket 11 and a bucket driving link mechanism 13 are attached to a tip of the slide arm 16, that is, a bottom of the hydraulic cylinder, and a bucket cylinder 12 is attached to an outer periphery of the hydraulic cylinder. The slide arm cylinder 9 and the bucket cylinder 12 are the same, and the bucket drive link mechanism 13 is the same as the slide arm drive link mechanism 10.

FIG. 5 is a schematic side view of a working machine of a hydraulic power shovel according to a fifth aspect, and FIG. 6 is a schematic side view of the working machine when a side hole excavation posture is taken. In the figure, FIG.
Since the same reference numerals as those in the schematic side view of the working machine of the hydraulic power shovel shown in FIG. In these figures, the boom 1 is a first boom 1a.
And a second boom 1b pivotally attached to a tip of the first boom 1a.
And a third boom 1c pivotally attached to a tip of the second boom 1b.
And is constituted by. The second boom 1b and the third boom
Both ends of the offset cylinder 4 are connected to the side surface of the boom 1c, respectively, and an offset mechanism is formed below the offset cylinder 4 by a link rod 5 connecting the side surfaces of the first boom 1a and the third boom 1c. 3
The boom 1c can be offset left and right with respect to the first boom 1a.

Next, regarding the horizontal hole digging by the working machine,
The case where the lower side of the cut beam is excavated in the horizontal direction will be described as an example. In FIG. 5, reference numeral 20 denotes a cross section of the cutting beam for supporting the upright of the sheet pile. In digging a horizontal hole, first, the first boom 1a is lowered, the bucket 11 is operated with the arm 6 and the slide arm 7 being substantially perpendicular, and a vertical hole is excavated between the cut beams 20.

After excavating the vertical hole, as shown in FIG.
The boom 1a is further lowered, and the slide arm cylinder 9 is driven such that the slide arm 7 is horizontal or almost horizontal while the arm 6 is maintained vertical. Thereafter, the telescopic cylinder 14 shown in FIG. 2 is driven, and the bucket 11 is operated while the arm body 7b is slid in the front-rear direction to perform horizontal excavation or leveling work below the cutting beam 20. At this time, by driving the offset cylinder 4 to adjust the direction of the arm 6, the cross-sectional area of the lateral hole can be increased.

[0015]

According to the present invention, as described above, the bucket is mounted on the tip of the arm of the hydraulic excavator via the slide arm which expands and contracts by driving the telescopic cylinder. Excavation and leveling work of the underground buried object can be easily performed without damaging the buried object. Therefore, labor-intensive work is eliminated, and work efficiency can be greatly improved. In the slide arm of the present invention, the tip end side on which the bucket is mounted is covered with the arm body, or a hydraulic cylinder is used as the slide arm, and the bucket is mounted on the bottom side of the hydraulic cylinder. There is almost no risk of biting. The slide arm cylinder for swinging the slide arm and the link mechanism for driving the slide arm are shared with the bucket cylinder and the link mechanism for driving the bucket mounted on the outer surface of the slide arm body. When the arm is removed, the work of changing the bucket from the slide arm to the arm can be performed in a very short time. In addition, since the bucket is mounted on the tip of the arm of the hydraulic excavator having the offset mechanism for the left-right direction via the slide arm that expands and contracts by driving the telescopic cylinder, the offset cylinder is driven to adjust the direction of the arm. Thereby, the cross-sectional area of the lateral hole can be increased.

[Brief description of the drawings]

FIG. 1 is a schematic side view of a working machine of a hydraulic power shovel according to claims 1, 2 and 4, showing a state where the working machine is lowered into a vertical hole provided between cut beams.

FIG. 2 is a partial sectional view showing a schematic structure of a slide arm.

FIG. 3 is a schematic side view of the working machine when a side hole excavation posture is taken.

FIG. 4 is a side view of the working machine according to the first, third, and fourth aspects.

FIG. 5 is a schematic side view of the working machine of the hydraulic power shovel according to claim 5, showing a state where the working machine is lowered to a vertical hole provided between the cutting beams.

FIG. 6 is a schematic side view of the working machine when the hydraulic power shovel according to claim 5 is in a horizontal hole excavation posture.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Boom 1a 1st boom 1b 2nd boom 1c 3rd boom 2 Upper revolving unit 4 Offset cylinder 6 Arm 7,16 Slide arm 7a Base arm 7b Arm body 9 Slide arm cylinder 10 Slide arm driving link mechanism 11 Bucket cylinder 12 Bucket cylinder 13 Linkage mechanism for bucket driving 14 Telescopic cylinder 14a, 16a Piston rod

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁶ , DB name) E02F 3/39 E02F 3/32

Claims (5)

(57) [Scope of request for utility model registration] 1. A boom pivotally mounted on an upper revolving structure of a hydraulic power shovel, an arm pivotally mounted on a tip of the boom, and a pivotally mounted shaft on a distal end of the arm. A hydraulic power shovel working machine, comprising: a slide arm that expands and contracts by driving a telescopic cylinder; and a bucket that is pivotally mounted on a tip of the slide arm. 2. A slide arm covers a base arm, a telescopic cylinder embedded in the base arm along the axis of the base arm, a piston rod of the base arm and the telescopic cylinder, and extends along an outer surface of the base arm. 2. The hydraulic power shovel working machine according to claim 1, further comprising a sliding arm body, and a bucket cylinder and a bucket driving link mechanism attached to an outer surface of the arm body. 3. A slide arm includes an arm body composed of a hydraulic cylinder, a bucket cylinder mounted on an outer surface of the arm body, and a link mechanism for driving a bucket. The hydraulic power shovel working machine according to claim 1, wherein the working machine is worn. 4. A slide arm cylinder for swinging a slide arm and a slide arm drive link mechanism,
The hydraulic power shovel working machine according to claim 2 or 3, wherein the working unit is the same as a bucket cylinder and a bucket driving link mechanism attached to an outer surface of the arm body. 5. The hydraulic power shovel working machine according to claim 1, wherein the arm has an offset mechanism in the left-right direction.