JPH08165675A - Hydraulic shovel having arm with built-in breaker - Google Patents

Abstract

PURPOSE: To obtain a hydraulic shovel having arm with a built-in breaker at a low cost, by making a chisel allowable to connect and disconnect to a breaker built-in type arm as installing to the breaker built-in type arm in a standard bucket tilt condition. CONSTITUTION: When the work is transferred from an excavation to a breaker work, an arm is removed, and a breaker built-in type arm 4b is pivoted to the tip of a boom 2, and it is combined by inserting a specific pin between the bucket hinge pin hole of a standard bucket 6, and a pair of the left and the right plates, for example. Then, one end of a bucket link 8 is inserted to the center of a standard bucket link pin hole so as to combine by a bucket link pin 13, and the rod 7a of a bucket cylinder 7 is inserted to the center of a connecting hole at the other end to combine. When the bucket cylinder 7 is extended, the standard bucket 6 is rotated to a tilt position, and in this case, a chisel 10 penetrates through an intermediate clearance between the through hole of the bucket line 8 having a clearance, and a pair of plates 16, so as to install to the tip of the front cap 14 of the breaker built-in type arm 4b, and the reassembly is completed.

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 an arm, and more particularly to a hydraulic excavator with a built-in breaker and a standard bucket.

[0002]

2. Description of the Related Art Regarding the hydraulic excavator with a built-in breaker, the applicant has proposed Japanese Patent Application No. 5-238921 exemplified in FIG. This structure has
A vehicle 1 including an upper revolving structure 1b, a boom 2 pivotally attached to the vehicle 1, a boom cylinder 3 for rotating the boom 2, a breaker built-in arm 4b pivotally attached to the tip of the boom 2. A front cap 14 for attaching the chisel 10 integrated with a breaker (not shown) is provided at the tip of the breaker built-in arm 4b. With the arm cylinder 5 pivotally mounted between the breaker built-in arm 4b and the boom 2, the breaker built-in arm 4b is pivotally mounted on the boom.

Also, one end of the bucket bracket 61 is
The front cap 14 and the bucket hinge pin 12 are rotatably coupled, and the other end is fixed to the bucket 60. One end of the bucket link 8 is rotatably coupled to the bucket 60 by a bucket link pin 13, the other end is connected to one end of the pair of intermediate links 9 and the bucket cylinder top pin 11, and the other end is connected to the front side. The cap 14 and the intermediate link pin 15 are rotatably connected to each other so that excavation work and breaker work can be performed.

However, general excavation work is carried out by the vehicle 1 of the hydraulic excavator shown in FIG. This configuration includes a vehicle 1 including a lower traveling body 1a and an upper swing body 1b, and a boom 2 pivotally attached to the vehicle 1.
A boom cylinder 3 for rotating the boom 2, an arm 4 pivotally attached to the tip of the boom 2, and an arm 4
A standard bucket 6 is attached to the tip of the bucket hinge pin 1
It is pivotally attached so that it can rotate about the fulcrum. Also, arm 4
An arm cylinder 5 pivotally mounted between the arm 2 and the boom 2 is pivotally mounted to the arm 4 so as to be rotatable. Then, one end of the bucket link 8 is rotatably coupled to the bucket of the standard bucket 6 by the bucket link pin 13, and the other end of the bucket link 8 is connected to one end of the pair of intermediate links 9 and the bucket cylinder top pin 11. At the other end of the intermediate link 9,
The arm 4 and the intermediate link pin 15 are rotatably connected to each other.

In the bucket 60 of the hydraulic excavator equipped with the breaker built-in arm 4b with respect to the standard bucket 6, the chisel 10 is installed through between the bucket hinge pin 12 and the bucket link pin 13 as shown in FIG. I am trying. Therefore, for the purpose of preventing the interference of the chisel 10, the bucket bracket 61 has a special shape in which the positions of the bucket hinge pin 12 and the bucket link pin 13 are long.

[0006]

A bucket 60 of a hydraulic excavator equipped with a breaker built-in arm 4a according to the prior art as shown in FIG.
The hole position of the bucket bracket 61 having the insertion portion is different from that of the bucket hinge pin 12 insertion portion of the standard bucket 6. For this reason, there is an inconvenience that it cannot be used for other construction machines. Therefore, the standard bucket 6
There is a problem that production of both the buckets 60 is complicated in terms of management. Further, since the bucket 60 cannot be used for other construction machines, there is a problem in that the cost increases on both the producer side and the user side.

The present invention has been made in view of the above problems, and relates to a hydraulic excavator with a breaker built-in type arm so that a standard bucket used in other construction machines can be shared. As a result, in the bucket tilt state, which is a feature of the bucket with the bucket bracket 61 fixed, a gap where a chisel can be attached and detached can be secured at the tip of the breaker built-in arm, and a standard bucket is attached to the breaker built-in arm. It is an object of the present invention to provide an inexpensive hydraulic excavator with a built-in breaker, which allows the crushing work along the wall by making the chisel detachable in this state.

[0008]

In order to achieve the above object, in the first invention of the hydraulic excavator with a built-in breaker type arm according to the present invention, a boom 2 pivotally attached to the hydraulic excavator is provided.
A breaker built-in arm 4b pivotally attached to the tip of the boom 2, a breaker built-in arm 4b and the boom 2
The arm cylinder 5 pivotally mounted between the arm cylinder 5 and the breaker built-in arm 4b is rotatably pivotally mounted, and is connected to the bucket cylinder 7 via the bucket link 8 and, at the time of tilting, the bucket hinge pin 12 and the bucket link. A bucket 60 for passing the chisel 10 between the pin 13 and the bucket link 8, one end of which is pivotally attached to the bucket 60 and the other end of which is pivotally attached to the pair of intermediate links 9, and one end of which is provided at the tip of the breaker built-in arm 4b. , A pair of intermediate links 9 pivotally attached to the bucket link 8 at the other end, one end to the breaker built-in arm 4b, the other end to the pair of intermediate links 9 and a bucket cylinder 7 connected to the bucket link 8. In the hydraulic excavator with a built-in breaker, the bucket 60 is changed to the standard bucket 6, and the first shaft hole 17
It has a shaft hole 18 and a third shaft hole 19, and the second of the standard bucket 6
A pair of plates 16 inserted into the shaft holes 18, and a fixing pin 20 for fixing the pair of plates 16 and the standard bucket 6
, A bucket link pin 13 inserted into the first shaft hole 17 and the bucket link 8, and a bucket hinge pin 12 inserted into the tip end of the breaker built-in arm 4b into the third shaft hole 19, and the standard bucket 6 The chisel 10 is positioned between the second shaft hole 18 of the plate 16 and the third shaft hole 19 of the plate 16 when tilted.

In the second invention mainly based on the first invention, the third shaft hole 19 of the pair of plates 16 has a center of the first shaft hole 17 attached to the standard bucket 6 and a second shaft hole 18. It is characterized in that a third shaft hole 19 is provided on the opposite side of the standard bucket 6 from a straight line connecting the center with a predetermined distance.

[0010]

According to the above structure, the standard bucket 6 has the bucket hinge pin 12 and the bucket link pin 13 which are shorter than the bucket 60, and therefore the pair of plates 1 is
As described above, when the standard bucket 6 having the pair of plates 16 attached thereto is pivotally attached to the vehicle 1 having the breaker built-in arm 4b attached thereto as described above, the first shaft holes 17 of the pair of plates 16 are provided.
Then, the second shaft hole 18 matches the size and position between the bucket hinge pin 12 and the bucket link pin 13 of the standard bucket 6.

The position of the third shaft hole 19 is the bucket 6
This corresponds to a bucket hinge pin 12 hole position of 0. At this time, the third shaft holes 19 of the pair of plates 16 have the center of the first shaft hole 17 attached to the pair of plates 16 and the second shaft hole 1.
8 is located on the opposite side of the standard bucket 6 from a straight line connecting the center of the plate 8 and the chisel 10 is attached to the breaker built-in arm 4b.
The intermediate gap Q of 6 and the gap P of the bucket link 8 can be secured. Therefore, the chisel 10 operates without interfering with various standard buckets 6 having a short wrist radius, which is a dimension between the conventional bucket hinge pin 12 and the bucket link pin 13.

[0012]

Embodiments of the present invention will now be described in detail with reference to the accompanying drawings. FIG. 1 is a side view of a hydraulic excavator with a built-in breaker arm according to an embodiment of the present invention in a breaker working state. Figure 2
FIG. 2 is a cross-sectional view taken along a line connecting the centers of the bucket cylinder top pin 11, the bucket link pin 13, the fixing pin 20, and the bucket hinge pin 12 of FIG. 1. FIG. 3 is a side view of the pair of plates 16 according to the embodiment of the present invention.

In the hydraulic excavator of the present invention shown in FIG. 1, the same parts as those shown in FIGS. 4 to 5 are designated by the same reference numerals, and the description thereof will be omitted. 4b is a built-in breaker arm similar to 4b in FIG. 4, 6 is a standard bucket similar to 6 in FIG. 5, 8
4 is a bucket link having a through hole 8a similar to 8 in FIG. 4, 9 is a pair of intermediate links similar to 9 in FIG. 4, and 14 is a front cap similar to 14 in FIG. Further, the standard bucket 6 has a bucket link pin hole 13a and a bucket link pin hole 13a and a bucket hinge pin hole 12a whose span is shorter than the span of the hole of the bucket bracket 61 of FIG. A pair of left and right standard bucket mounting brackets 6a are fixed.

The pair of plates 16 are composed of a left side plate 16a and a right side plate 16b whose outer shapes are symmetrical to each other, and are provided on a pair of standard bucket mounting brackets 6a fixed to the standard bucket 6, as shown in FIGS. Bucket hinge pin hole 12a and bucket link pin hole 1
It matches 3a. Further, the plate 16 has first shaft holes 17a and 17b, second shaft holes 18a and 18b, and third shaft holes 19a and 19b. A third shaft hole 19 is provided on the opposite side of the standard bucket 6 from a straight line connecting the center of the first shaft hole 17 attached to the standard bucket 6 and the center of the second shaft hole 18 with a predetermined distance. . Further, the fixing pin 20 is inserted into the second shaft hole 18, and the plate 16
It is stuck to. Further, in the fixing pin 20, the left side plate 16a has the left side fixing pin 20a and the right side plate 16b.
A right fixing pin 20b is provided on the. Then, in the first shaft holes 17a and 17b and the second shaft holes 18a and 18b,
Bucket link pin 13 and fixed pin 20a,
20b through the mating holes to form a pair of plates 16
Is the standard bucket mounting bracket 6a of the standard bucket 6.
It is fixed and attached to.

According to the above construction, when shifting from excavation work to breaker work, the arm 4 is removed from the vehicle 1 of the hydraulic excavator shown in FIG. 5, and as shown in FIG. Pivot at the tip. In the bucket hinge pin hole 12a of the standard bucket 6,
The fixing pins 20a and 20b fixed to the second shaft holes 18a and 18b provided in the pair of left side plate 16a and right side plate 16b are inserted. Also, the left side plate 1
6a, the left side first shaft hole 17a and the right side first shaft hole 17b of the right side plate 16b are aligned with the center of the bucket link pin hole 13a attached to the standard bucket 6 and connected. And
The cap 21 is attached to the bucket hinge pin hole 12a on the right side fixing pin 20b side with a bolt 22.

Next, one end of the bucket link 8 is inserted into the middle of the bucket link pin hole 13a of the standard bucket 6 so that the hole of the bucket link 8 is aligned with the center of the bucket link pin hole 13a.
Insert and connect. In addition, the left side plate 16
a, and the bucket hinge pin 12 is inserted by aligning the left third shaft hole 19a and the right third shaft hole 19b provided in the right plate 16b with the center of the hole at the tip of the front cap 14. Then, the detent caps 23 for the bucket hinge pin 12 and the bucket link pin 13 on the right side plate 16b side are attached with bolts 22, respectively. In addition, the bucket hinge pin 12 on the left side plate 16a side
Then, the bucket link pin 13 is tightened with the bolt 25 via the retaining collar 24 to complete the connection.

A rod 7a of the bucket cylinder 7 is inserted in the middle of the connecting hole at the other end of the bucket link 8, and a connecting hole at one end of the pair of intermediate links 9 is provided outside the rod 7a. It is inserted with the cylinder top pin 11 and is tightened with bolts 25 via the retaining collar 24 to be connected.

Next, when the bucket cylinder 7 is extended, the front cap 14 of the breaker built-in arm 4b is extended.
A standard bucket 6 pivotally attached via a pair of plates 16 with a bucket hinge pin 12 at the tip as a fulcrum, a pair of intermediate links 9 and a bucket link 8 pivotally attached to the standard bucket 6 coupled to the pair of plates 16. Is swung to the tilt position shown in FIG. Then, the chisel 10 is inserted through the through hole 8a having the gap P of the bucket link 8.
Then, the intermediate gap Q between the pair of plates 16 is penetrated and attached to the tip of the front cap 14 of the breaker built-in arm 4b. As a result, the reassembling work from the state of the arm 4 for excavation work to the breaker built-in arm 4b for breaker work is completed.

To perform the breaker operation, the chisel 10 is moved between the bucket link 8, the pair of left side plates 16a, and the right side plate 16b while the bucket cylinder 7 is extended and the standard bucket 6 is operated toward the tilt side. If the bucket 6 is attached to the breaker built-in arm 4b through the intermediate gap Q, the breaker work can be performed with the bucket 6 still attached to the breaker built-in arm 4b. Even when the chisel 10 is operated vertically during the breaker work near the wall, the distance L2 between the chisel 10 and the wall W is greatly reduced as in the case of using the conventional bucket 60 of FIG. 4, which is L1. be able to. In addition, the distance h2 from the standard bucket 6 or the bucket link 8 to the bottom surface of the chisel 10.
Since it can be greatly increased similarly to the conventional technique h1 shown in FIG. 4, workability of the breaker work at the time of the breaker work near the wall can be improved.

Next, regarding the method of attaching the chisel 10 to the breaker built-in type arm 4b, the structure and operation of the above-mentioned conventional Japanese Patent Application No. 5-238921 with built-in breaker type hydraulic excavator will be described. Therefore, detailed description is omitted here.

[0021]

As described above in detail, according to the present invention, the bucket 6 can be prepared by simply preparing a pair of inexpensive plates 16.
0 is not required, the standard bucket 6 is tilted, and the chisel 10 with the built-in breaker arm 4b is attached.
Since the arm can be attached to and detached from the breaker built-in arm 4b, the wall W can be crushed up to the wall edge L2 in the wall edge crushing work. Therefore, the crushing amount is increased or the penetration amount h2 of the chisel 10 is increased to improve workability. it can. Therefore, also in terms of production, since it is sufficient to equip the breaker-equipped arm 4b and the pair of inexpensive plates 16, the complexity of production management is eliminated, and the breaker-equipped arm hydraulic excavator can be provided at low cost. Excellent effect can be obtained.

Further, since the chisel 10 can be attached / detached while the various kinds of standard buckets 6 are still attached, it becomes possible to perform a combined work of soil excavation work and wall crushing work, and when the bucket is not needed. The excellent effect that it can be used for other construction machines is obtained. Therefore, the user side
Since it is not necessary to prepare both the standard bucket 6 and the bucket 60, it is possible to obtain an excellent effect that complexity of management is eliminated.

[Brief description of drawings]

FIG. 1 is a side view of a hydraulic excavator with a built-in breaker arm according to an embodiment of the present invention in a breaker working state.

2 is a cross-sectional view taken along a line connecting the centers of the bucket cylinder top pin 11, the bucket link pin 13, the fixing pin 20, and the bucket hinge pin 12 of FIG.

FIG. 3 is a side view of a pair of plates 16 according to the embodiment of the present invention.

FIG. 4 is a side view of a conventional hydraulic excavator with a built-in breaker arm in a breaker working state.

FIG. 5 is a side view of a conventional hydraulic excavator.

[Explanation of symbols]

2 booms, 4b arm with built-in breaker, 5 arm cylinder,
6 standard buckets, 7 bucket cylinders,
8 bucket link, 9 middle link, 10 chisel, 12 bucket hinge pin, 13 bucket link pin, 16 plate 16, 17
1st shaft hole, 18 2nd shaft hole, 19
3rd shaft hole, 20 fixing pin,
60 buckets.

Claims (2)

[Claims] 1. A boom (2) pivotally attached to the hydraulic excavator,
This boom (2) has a built-in breaker arm (4
b), this breaker built-in arm (4b) and the boom (2)
The arm cylinder (5) pivotally mounted between the arm cylinder (5) and the breaker built-in arm (4b) are pivotally mounted, and are connected to the bucket cylinder (7) via the bucket link (8) and tilted. Sometimes the bucket (60) passes the chisel (10) between the bucket hinge pin (12) and the bucket link pin (13).
A bucket link (8) having one end pivotally attached to the bucket (60) and the other end pivotally attached to the pair of intermediate links (9), one end to the tip of the breaker built-in arm (4b), and the other end. A pair of intermediate links (9) pivotally attached to the bucket link (8), one end to the breaker built-in arm (4b), and the other end to the pair of intermediate links.
(9) In a hydraulic excavator with a built-in breaker consisting of a bucket cylinder (7) connected to the bucket link (8), the bucket (60) is used as a standard bucket (6), and the first shaft hole ( 17), a second shaft hole (18), a third shaft hole (19), a pair of plates (16) to be inserted into the second shaft hole (18) of the standard bucket (6), and a pair of plates (16) and standard bucket
Fixing pin (20) for fixing (6) and bucket link pin (13) inserted into the first shaft hole (17) and bucket link (8)
And a bucket hinge pin (12) that inserts the third shaft hole (19) into the tip of the breaker built-in type arm (4b). When the standard bucket (6) is tilted, the second hinge of the plate (16) Between the shaft hole (18) and the third shaft hole (19) of the plate (16), the chisel (1
Hydraulic excavator with built-in breaker, characterized in that (0) is located. 2. The pair of plates (16) according to claim 1.
The third shaft hole (19) of the standard bucket (6) is located on the straight line connecting the center of the first shaft hole (17) attached to the standard bucket (6) and the center of the second shaft hole (18). A hydraulic excavator with a built-in breaker, which is characterized in that a third shaft hole (19) is provided on the opposite side to a predetermined distance.