JPH11293716A - Bucket tool of power shovel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simply attach and detach a leveling plate to an excavating claw of an excavation bucket in a detachable manner. SOLUTION: A bucket tool of a power shovel is constituted of an edge 7 fixed in the direction of the width of the lower part of a bucket, a claw attached device 8 fixed to the edge 7 at a specific interval in the direction of the width, an excavating claw 9 provided to the claw attached device 8 in a detachable manner, projected forward of the edge 7 and provided with an insertion hole bored in the front end, a leveling plate 10 having the approximately same width as that of the lower part of the bucket and a joint device 11 fixed to the upper surface of the leveling plate 10 by having an interval approximately equivalent to a fixed interval of the claw attached device 8 and detachable to the front end of the excavating claw 9. At least one of joint device holes 23 bored in the joint device has a shape corresponding to a diameter of a pin, the other has a shape narrowly bored in the direction of the width of the bucket, horizontal slippage of the excavating claw and leveling plate can be prevented during the work, and the leveling plate can be easily provided in a detachable manner.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power shovel bucket tool that enables a power shovel bucket to be used not only for excavation work but also for ground leveling work.

[0002]

2. Description of the Related Art As shown in FIG. 6, a boom 2 is mounted on a power shovel 1 used for civil engineering work so that the boom 2 can be raised and lowered. The base of the bucket 4 is pivotally connected to the tip of 3. A plurality of excavating claws 5 are provided at the front of the bucket 4 in a fork-like manner at intervals.

The excavator 1 is turned horizontally to change the direction of the boom 2, and the excavation claw 5 is used to move the excavator 1 up and down and the arm 3 and the bucket 4 to move the excavator 1. Rocks and the like are excavated, and excavated earth and sand are scooped up by a bucket 4 and loaded into a dump truck or the like. Conventionally, when leveling is performed after the excavation operation is completed, the leveling operation is performed by one of the following three methods.

(1) The digging bucket 4 on which the digging claws 5 are projected is replaced with a bucket dedicated to the grading work without the digging claws 5 to perform the grading work. (2) Excavation claw 5 projecting from bucket 4 for excavation
Then, a rectangular steel plate having a width substantially equal to the width of the bucket 4 and a length substantially equal to the length of the excavation claw 5 is welded, and the ground leveling work is performed on the end face of the steel plate. (3) A detachable split claw whose width is widened and adjacent ones are overlapped with each other is mounted on the excavation claw 5, and the leveling work is performed with the split claw.

[0005]

However, in the case of (1) when performing the leveling work by replacing the bucket for the leveling work without the excavating claws 5 with one excavator 1, the bucket 4 for the leveling operation is required. In addition, it is necessary to have a bucket dedicated to leveling work, which increases the cost, and also has a problem that the work of replacing the bucket on site is troublesome. In the method (2) of welding a steel plate to the excavation claw 5 of the bucket 4 for excavation, on-site welding is troublesome, and when the next excavation work is performed, the work of removing the steel plate welded to the excavation claw 5 is not performed. Have difficulty. In the method of (3), in which the wide and mutually removable detachable split claws are attached to the excavating claws 5 to perform the leveling work, a portion where the split claws overlap is not flat but uneven, and the leveling ground is flat. Therefore, it is unsuitable for leveling work that requires accuracy, and the width of the split claws is large, which increases the load on each split claw. There was a drawback that could not be used.

Accordingly, the present invention eliminates the above-mentioned drawbacks of the prior art, and allows the leveling plate to be easily attached to and detached from the excavating claws of the excavating bucket, so that the excavating operation can be performed without any troublesome operation. We have already proposed a bucket tool for a power shovel that can perform both leveling work.
(Japanese Patent Application No. 9-64574) An object of the present invention is to further improve the above and improve the workability.

[0007]

According to a first aspect of the present invention, there is provided a nail mounting device fixed to the front of a bucket bottom plate at a lower portion of a bucket in a width direction, and to the edge with a space in the width direction. An excavating claw detachably mounted on the claw mounting device and having an insertion hole protruding forward of the edge and drilled at the tip thereof, and a leveling plate having a width equal to the width of the lower portion of the bucket. A fastener fixed to the top surface of the leveling plate with a spacing substantially equal to the fastening distance of the nail mounting tool, and at least one of the fastener holes formed in the fastener has a pin diameter. The present invention relates to a bucket tool for a power shovel, which has a shape corresponding to that of the power shovel, and has a shape that is drilled long in the lateral width direction of the bucket. Drilling claw insertion hole Can easily attach and detach the leveling plate through the leveling plate fitting to the distal end of the excavation teeth without hindrance in lateral position is not consistent for fitting hole of.

The invention according to claim 2 is characterized in that a coupling hole formed in a shape corresponding to the diameter of the pin is formed substantially in the center of the lower part of the bucket in the width direction. Since the hole for the coupling having a shape corresponding to the diameter of the pin is formed substantially at the center, the hole is symmetrical with respect to the right and left, so that the leveling plate can be easily attached and detached. According to a third aspect of the present invention, there is provided a power shovel bucket tool according to the first or second aspect, further comprising a spacer interposed between the excavating claw and the coupler together with the retaining ring. Even if the position in the vertical direction is not uniform, the leveling plate can be attached without any trouble.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 5 is a perspective view showing an example of the embodiment of the present invention. Side shrouds 6 are fixed in the vertical direction near both lower sides of the bucket 4,
An edge 7 is fixed to the lower portion of the bucket 4 in the width direction in front of the bottom plate of the bucket.

At the front of the edge 7, a plurality of claw attachments 8 are fixed at substantially constant intervals in the lateral width direction. The nail mounting device 8 is a solid body having a rectangular cross section and extending forward, and a drilling claw 9 is detachably mounted on the nail mounting device 8 as described below. In addition, a ground leveling plate 10 having a width equal to the width of the lower portion of the bucket 4 is detachably attached to the excavation claw 9 via a coupling tool 11. And the drilling claw 9
The shape of the coupling hole for fixing the coupling 11 to the center is a pin shape 23 ′ in the center, and the other is a horizontally long shape 23.

FIG. 1 shows the above-mentioned claw mounting tool 8, excavation claw 9,
FIG. 2 is an enlarged plan view showing a main part of an example of the embodiment of the present invention provided with the leveling plate 10, the coupler 11, and the horizontally long connector hole 23. FIG. Is an enlarged plan view showing the main part of the central portion, which has been changed to a fitting hole 23 'adapted to the shape of the pin 27, and FIG. 3 is a II-I of FIGS.
FIG. 4 is a vertical cross-sectional view as viewed from III-III in FIG. 1, and as shown in FIG. 1, a nail mounting device fixed to a front portion of the edge 7 by welding 12 as shown in FIG. 1. 8
3 protrudes from the front part of the edge 7, and a hole 13 is formed in the tip part of the nail mounting tool 8 in the vertical direction as shown in FIG. 3.

The excavation claw 9 detachably attached to the tip of the claw attachment 8 has a fitting opening 14 which is opened rearward as shown in FIGS. A hole 15 is formed above the rear part of the hole 14 as shown in FIG. As shown in FIG. 3, the plug 16 is inserted into the hole 13 of the nail mounting device 8.
After the insertion, the insertion opening 1 of the excavation claw 9 is
Then, the pin 17 is inserted into the hole 15 of the excavation claw 9 and penetrated. The excavation claw 9 is fixed to the claw attachment 8 in a state of being attached to the tip of the claw attachment 8. When the pin 17 is pulled out from above or below the hole 15, the excavating claw 9 is moved to the claw attaching device 8.
Can be extracted from

As shown in FIGS. 1 to 4, a low flat portion 18 extending over the entire width of the excavation claw 9 is provided at the tip of the excavation claw 9.
Is formed, and an insertion hole 19 for the pin 27 is formed in the center of the flat portion 18.
As shown in FIGS. 3 and 4, a step portion 20 is formed. A ground leveling plate 10 is located on the lower surface of the excavating claw 9 as shown in FIGS.
Has a width equal to the width of the lower portion of the bucket 4 as described in FIG.
(See FIGS. 1, 2 and 3).

As shown in FIG. 3, the rear end of the coupler 11 extends like an eaves, and an opening 22 is formed on the lower surface of the lower rear part of the coupler 11 over the entire width of the coupler 11. . The flat portion 18 formed at the tip of the excavation claw 9 described above can be inserted into the opening 22.

In the portion where the rear part of the coupling 11 extends in an eaves shape, a coupling hole 23 which is long in the width direction of the coupling 11 as shown in FIGS. 3 and 4, or a pin-shaped as shown in FIG. A coupling hole 23 'is formed, and a step portion 24 is formed on the upper peripheral edge thereof.

A spring washer-shaped retaining ring 25 is placed on the stepped portion 20 at the tip of the excavating claw 9 described above, and the flat portion 18 of the excavating claw 9 is inserted into the opening 22 at the rear of the coupling 11, and a groove is formed on the outer periphery of the intermediate portion. As shown in FIG. 3, the pin 27 having the pin 26 is connected to the coupling hole 23 (23 '), the retaining ring 25, and the insertion hole 1 as shown in FIG.
9, the retaining ring 25 is inserted into the groove 26 of the pin 27.
And the pin 27 does not come off, and the joint 11 is attached to the tip of the excavation claw 9 and the leveling plate 10 fixed to the lower surface of the joint 11 by welding 21 as shown in FIG. It is fixed to the lower side of the excavation claw 9 and the ground can be leveled.

As shown in FIG. 3, the flat portion 18 of the excavation claw 9 is inserted into the opening 22 at the rear portion of the coupling tool 11, and is connected to the upper surface of the flat portion 18 formed at the tip of the excavation claw 9. Between the lower portion of the eaves-like portion at the rear of the tool 11
If a gap is formed, the step 2 at the tip of the excavation claw 9
When the spring washer-shaped retaining ring 25 is placed on the retaining ring 25, the washer-shaped spacer 2 having an appropriate thickness is further placed on the retaining ring 25.
8, the pin 27 is connected to the coupling hole 23 (2
3 '), when the spacer 28, the retaining ring 25, and the insertion hole 19 are inserted, the retaining ring 25 comes into close contact with the bottom surface of the step portion 20 at the tip of the excavation claw 9, and the spacer 28 extends like an eave at the rear portion of the coupling tool 11. The lower end of the excavation claw 9 is tightly contacted with the lower end of the excavation claw 9 and the coupling tool 11 so that no rattling occurs.

In FIG. 5, the mounting pitch in the width direction of the plurality of nail mounting devices 8 fixed to the front portion of the edge 7 may be different depending on the manufacturer.
Although the horizontal center position of the excavating claw 9 attached to the tip of the connector and the horizontal center position of the coupler 11 do not exactly coincide with each other, the opening 22 of the coupler 11 is The flat portion 18 of the excavating claw 9 is connected to the opening 2 at the rear of the coupling 11 because the entire width of the coupling 11 is equal to the pitch difference.
There is no hindrance to plugging into 2. When the pin-shaped coupling hole 23 ′ is aligned with the corresponding insertion hole 19 of the excavating claw 9, the other coupling hole 23 is elongated in the width direction, so that the pin 27 is inserted into the coupling hole 23. There is no hindrance in inserting it into the hole 19.

Further, the vertical positions of the plurality of claw attachments 8 are also uneven. However, if the height of the opening 22 of the coupling tool 11 is set large and a spacer 28 having an appropriate thickness is interposed, Even if the vertical position of the tip of the excavation claw 9 is irregular based on the irregularity of the vertical position of the claw mounting device 8, the flat portion 18 of the excavation claw 9 is inserted into the opening 22 at the rear portion of the coupling tool 11. And there is no backlash between the excavating claw 9 and the coupling tool 11 and the leveling plate 10.

As shown in FIGS. 1 to 3, when the leveling plate 10 is fixed to the lower side of the excavation claw 9, when the pin 27 is pulled out with a force higher than the locking force of the retaining ring 25, The leveling plate 10 can be removed from the tip of the excavation claw 9 together with the coupling tool 11, and the excavation claw 9 is exposed, so that the excavation work can be performed. The excavation claw 9 in the excavation state can be replaced with another excavation claw 9 having a different shape and size by pulling out the pin 17 shown in FIG. 2 from above or below the hole 15.

[0021]

According to the first aspect of the present invention, in a power shovel operation in which an excavation operation and a leveling operation are required alternately, there is no need to prepare a bucket dedicated to the leveling operation, and a leveling plate to which a coupling tool is fixed is provided. The cost can be reduced, the equipment can be easily transported, the installation and removal work can be easily performed on site, and the excavation claw and the leveling plate can be prevented from moving sideways during the work. This is effective for leveling work that requires flatness and precision.

According to a second aspect of the present invention, there is provided a coupling device fixed to the top surface of the leveling plate even if the plurality of claw mounting devices fixed to the front portion of the bucket bottom plate have different mounting pitches in the width direction. Even if there is an error in the mounting pitch in the width direction of 11 as well, the error is adjusted to the left and right by setting the pin-shaped coupler hole at the center, and the leveling plate can be easily attached and detached. This has the effect of not disturbing the mounting of the slab. According to the third aspect of the present invention, even if the plurality of claw mounting tools are not aligned in the vertical direction, the mounting of the leveling plate is not hindered, and the rattling between the excavation claw, the coupling tool, and the leveling plate is achieved. There is an effect that does not occur.

[Brief description of the drawings]

FIG. 1 is a plan view showing a main part of an example of an embodiment of the present invention.

FIG. 2 is a plan view showing a main part of an example of the embodiment of the present invention.

FIG. 3 is a longitudinal sectional side view as viewed from II-II in FIGS. 1 and 2;

FIG. 4 is a vertical sectional front view taken along line III-III in FIG. 1;

FIG. 5 is a perspective view showing an example of an embodiment of the present invention.

FIG. 6 is a side view showing an example of a power shovel.

[Explanation of symbols]

 Reference Signs List 4 bucket 7 edge 8 claw mounting tool 9 excavation claw 10 leveling plate 11 coupler 19 insertion hole 23 (23 ') coupler hole 25 retaining ring 27 pin 28 spacer

Claims (3)

[Claims] 1. An edge fixed in a width direction in front of a bucket bottom plate at a lower portion of a bucket, a claw mounting device fixed to the edge at an interval in the width direction, and detachably mounted on the claw mounting device. And an excavating claw having an insertion hole protruding forward of the edge and drilled at the tip, a leveling plate having a width equal to the width of the lower portion of the bucket, and a fixing interval of the claw mounting device is substantially equal to the fixing interval. It consists of a fastener fixed to the upper surface of the leveling plate with an interval, and at least one of the fastener holes formed in the fastener has a shape corresponding to the pin diameter, and the other has a width in the width direction of the bucket. A bucket tool for a power shovel, characterized by having a long perforated shape. 2. The power shovel according to claim 1, wherein a coupling hole formed in a shape corresponding to a diameter of the pin is formed in a substantially central portion of the lower portion of the bucket in a lateral width direction. Bucket tool. 3. The bucket tool for a power shovel according to claim 1, further comprising a spacer interposed between the excavating claw and the coupling together with the retaining ring.