JP3406829B2 - bucket - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bucket suitably used for a working machine such as a hydraulic excavator.

[0002]

2. Description of the Related Art Generally, a working machine such as a hydraulic excavator includes a lower traveling body and an upper revolving body, and a working device is provided in a front portion of the upper revolving body. Then, the working device is composed of a boom provided on the upper swing body so as to be able to lift and descend, an arm provided at the tip of the boom so as to be able to lift and lower, and a bucket rotatably provided at the tip of the arm. It is configured.

In addition to excavating earth and sand, hydraulic excavators are sometimes used on berths to take out soft earth and sand containing a large amount of water, sludge, etc. loaded on barge vessels. In the case of simple soil excavation work, the work is done with a bucket that does not have excavation claws attached to the tip of the bucket.

Therefore, the case where the bucket according to the prior art is used in a hydraulic excavator for earthmoving work will be described as an example with reference to FIGS.

Reference numeral 1 is a barge, 2 is a barge anchored along the barge 1, and the barge 2 is for carrying soft earth and sand containing a large amount of water, sludge, etc., and accommodating these earth and sand. A sediment storage unit 3 is provided, and the sediment storage unit 3 has a bottom surface 3A.
And an inner wall surface 3B surrounding the bottom surface 3A. A hydraulic excavator 4 to be described later is provided on the pontoon 1.

Reference numeral 4 denotes a hydraulic excavator provided on the pontoon 1. The hydraulic excavator 4 is composed of a lower traveling body 5 and an upper revolving body 6 provided on the lower traveling body 5 so as to be rotatable. A working device 7 is provided at the front of the upper swing body 6.

Further, the working device 7 has a boom 8 provided on the front part of the upper revolving structure 6 so as to be able to move up and down, an arm 9 provided at the tip of the boom 8 so as to be able to move up and down, and the arm 9. The bucket 10 is rotatably provided at its tip.

Here, as shown in FIG. 6, the bucket 10 includes a bottom plate 11 curved in a concave arc shape, a left side of the bottom plate 11,
Side plates 12 and 12 fixed on both right and left side plates 1
Plate-shaped side edges 13 and 13 provided on the opening side of the Nos. 2 and 12 extending upward and downward, and provided on the tip side of the bottom plate 11 and extending to the left and right directions and at the lower ends of the side edges 13 respectively. Fixed plate-shaped cutting edge 1
4 and a pair of mounting brackets 15 and 15 which are fixed to the base end side of the bottom plate 11 so as to be separated leftward and rightward.

Incidentally, the bucket 10 used for the hoisting work
Since it scoops soft earth and sand and sludge from the earth and sand accommodating portion 3 of the barge 2, the excavation claws and the like for ordinary excavation work are not attached.

In the hydraulic excavator 4 according to the prior art constructed as described above, the lower traveling body 5 is fixed on the pontoon 1 by a wire rope (not shown) or the like. Also,
The undercarriage 5 is removed, and the upper revolving structure 6 is placed on the deck of the barge 1.
In some cases, it can be fixed so that it can rotate.

When the barge 2 is anchored along the berth 1, the hydraulic excavator 4 raises the boom 8 and the arm 9 and is housed in the earth and sand container 3 of the barge 2 by the bucket 10. Scoop off soil and sand and perform earthing work. At the time of this hoisting work, the excavation claws and the like are removed from the bucket 10 to prevent the inner wall surface 3B and the like of the earth and sand container 3 from being damaged by the excavation claws.

[0012]

By the way, in the bucket 10 according to the above-mentioned prior art, the bucket 10 is not provided with an excavating claw or the like so as not to damage the earth and sand storage portion 3 of the barge 2. However, since the side edges 13 and the cutting edge 14 of the bucket 10 are fixed at a right angle, the corners 16, 16 connecting the side edges 13 and the cutting edge 14 have a sharp shape.

For this reason, as shown in FIG. 7, when hoisting work is performed with the upper swing body 6 being swung, as shown in FIG. 8, the corners 16 of the bucket 10 are located inside the earth and sand accommodating portion 3. When colliding with the wall surface 3B or the like, there is a problem that the sharp corner portion 16 damages the inner wall surface 3B or the like of the earth and sand storage portion 3.

The present invention has been made in view of the above-mentioned problems of the prior art, and an object of the present invention is to prevent damage to a barge ship or the like by a bucket, and to improve workability during dumping work.
It is to provide a bucket that can improve reliability.

[0015]

A bucket according to the present invention comprises a bottom plate, side plates provided on both left and right sides of the bottom plate,
It is composed of a side edge provided on the opening side of each side plate, and a cutting edge located between the side edges and provided on the tip side of the bottom plate.

In order to solve the above problems,
A feature of the configuration adopted by the invention of claim 1 is that a corner member having an outer peripheral surface having a convex curved surface is fixedly provided at a corner portion connecting each of the side edges and the cutting edge.

With this configuration, for example,
When the work is performed with the bucket tilted with respect to the inner wall surface of the earth and sand storage section in which the earth and sand etc. are stored, the corners connecting the side edges and the cutting edge collide with the inner wall surface. Since the corner portion is a corner member whose outer peripheral surface has a convex curved surface, the corner member can reduce the impact on the inner wall surface and prevent the inner wall surface from being damaged at this time.

According to a second aspect of the present invention, the side edge, the cutting edge and the corner member are integrally fixed by welding means. As a result, the corner member can be easily and firmly fixed to the side edge and the cutting edge.

According to a third aspect of the present invention, the corner member includes a vertical plate portion extending upward and downward, and a horizontal plate portion extending leftward and rightward.
The vertical plate portion and the convex curved surface portion formed between the horizontal plate portions are provided. The side edge is provided with a notch fitting portion for fitting the vertical plate portion, and the cutting edge is fitted with the horizontal plate portion. The reason is that a notch fitting portion for fitting is provided.

With this structure, the corner member can be fixed to the side edge and the cutting edge in a state where the step between the corner member and the side edge and the cutting edge is eliminated. Also, the vertical plate part,
By fitting the lateral plate portion into the notch fitting portion, the corner member can be firmly fixed to the side edge and the cutting edge.

According to the fourth aspect of the present invention, the convex curved surface of the corner member is formed of a spherical surface or a spherical surface forming a part of an ellipsoid. The impact can be mitigated regardless of the angle of collision.

[0022]

BEST MODE FOR CARRYING OUT THE INVENTION A bucket according to an embodiment of the present invention will be described in detail below with reference to FIGS. In addition, in the present embodiment, the same components as those of the conventional technique are designated by the same reference numerals, and the description thereof will be omitted.

Reference numeral 21 denotes a bucket according to the present embodiment which is used in place of the bucket 10 according to the prior art. The bucket 21 includes a bottom plate 22 curved in a concave arc shape and the bottom plate 22.
Of the left and right side plates 23, 23 and side edges 2 provided on the opening side of the left and right side plates 23, 23.
4, 24, a cutting edge 25 provided on the tip end side of the bottom plate 22, and a pair of mounting brackets 26, 26 fixed to the base end side of the bottom plate 22 so as to be separated left and right. ing.

Here, each side edge 24 is formed in a thin flat plate shape extending upward and downward as shown in FIG.
A rectangular notch fitting portion 24A is formed on the lower side thereof. The cutting edge 25 extends in the left and right directions and is formed in a thick plate shape fixed to the lower end of each side edge 24, and has rectangular cutout fitting portions 25A and 25A on both the left and right sides thereof. Are formed. Further, the front end portion of the cutting edge 25 is an inclined surface portion 25B that gradually becomes thinner toward the front. The left and right side edges 24 and the cutting edge 25 are fixed to each other by welding parts W1 and W1 forming a welding means.

27, 27 are left and right side edges 24,
As shown in FIG. 3, each of the corner members 27 is a left and right corner member provided at a corner portion connecting the cutting edge 25 with the cutting edge 25. A plate portion 28 and a horizontal plate portion 29 formed in a thick wall corresponding to the cutting edge 25 are formed in an L shape, and a front end portion of the horizontal plate portion 29 has an inclined surface portion 25B of the cutting edge 25. 29 A of continuous inclined surface parts are formed. A convex curved surface portion 30 is provided between the vertical plate portion 28 and the horizontal plate portion 29.

Here, the convex curved surface portion 30 connects the vertical plate portion 28 and the horizontal plate portion 29 with a smooth arc, and has an arc shape so as to bulge forward. As a result, the outer peripheral surface of the convex curved surface portion 30 is a spherical surface forming a part of a spherical body or an ellipsoid.

Then, the left and right corner members 27, 27
The vertical plate portion 28 has the notch fitting portion 2 of the side edge 24.
4A is fitted and the horizontal plate portion 29 has a cutting edge 25.
Of the vertical plate portion 28 in this state.
Is firmly fixed to the side edge 24 by the welded portions W2 and W2, and the horizontal plate portion 29 is firmly fixed to the cutting edge 25 by the welded portions W3 and W3.

The bucket 21 according to the present embodiment has the above-mentioned structure, and its basic operation is as follows.
There is no particular difference from the conventional technology.

Therefore, the bucket 21 according to this embodiment is
Then, corner members 27, 27 are provided at the corners connecting the left and right side edges 24, 24 and the cutting edge 25, and each of the corner members 27 has a convex curved surface portion 30. Therefore, when the soil hoisting work is performed with the upper-part turning body 6 being turned, as shown in FIG.
Since the convex curved surface portion 30 of No. 7 collides with the inner wall surface 3B of the earth and sand accommodation portion 3, the inner wall surface 3B of the bucket 21 is
Can be prevented from being damaged, and workability at the time of work for excavation and reliability of the bucket 21 can be improved.

Further, the side edge 24 has a notch fitting portion 24.
A is formed, and the notch fitting portion 25 is formed on the cutting edge 25.
Since A is formed and the corner member 27 is fixed to the notch fitting portions 24A and 25A in a fitted state, there is no step between the side edge 24, the cutting edge 25 and the corner member 27. It can be installed in a state, and the appearance can be neat.

Moreover, since the corner members 27 are fixed to the notch fitting portions 24A and 25A by the welded portions W2 and W3, the corner members 27 are firmly attached to the side edge 24 and the cutting edge 25. It can be fixed, the rigidity can be increased, the life can be extended, and the reliability can be improved.

Further, the convex curved surface portion 30 of the corner member 27.
Is formed as a spherical surface forming a part of a spherical body or an ellipsoid, even if the angle at which the convex curved surface portion 30 of the corner member 27 collides with the inner wall surface 3B is different, an impact is generated regardless of this angle. Can be relaxed.

In the embodiment, the case where the convex curved surface portion 30 of the corner member 27 is formed as a spherical surface or a spherical surface forming a part of an ellipsoid has been described as an example, but the present invention is not limited to this. , The convex curved surface portion 3 of the corner member 27, for example
0 may be formed as another curved surface forming a part of a convex curved body having a shell shape, an egg shape, or the like.

Further, in the embodiment, the case where the hydraulic excavator 4 having the lower traveling body 5 and the upper revolving body 6 is provided on the pontoon 1 has been described as an example, but the present invention is not limited to this.
For example, it may be applied to a hydraulic excavator in which the upper revolving structure 6 is provided directly on the pontoon 1 so as to be rotatable, or may be applied to a wheel type hydraulic excavator.

[0035]

As described in detail above, according to the first aspect of the invention, the corners connecting the side edges provided on the opening side of the left and right side plates and the cutting edge provided on the tip side of the bottom plate. A corner member whose outer peripheral surface has a convex curved surface is fixedly provided to the portion. Therefore, for example, when the work is performed in a state where the bucket is tilted with respect to the inner wall surface of the earth and sand storage portion in which the earth and sand and the like are stored, the corner member having the convex curved surface can collide with the inner wall surface. At this time, it is possible to prevent damage to the inner wall surface, and improve workability such as hoisting work and reliability of the bucket.

According to the invention of claim 2, the side edge,
Since the cutting edge and the corner member are integrally fixed by the welding means, the corner member can be easily and firmly fixed to the side edge and the cutting edge, and the assemblability and the rigidity can be improved.

According to the third aspect of the present invention, the corner member includes the vertical plate portion, the horizontal plate portion, the vertical plate portion, and the convex curved portion between the horizontal plate portions, and the vertical plate portion is fitted to the side edge. Since the notch fitting part is provided and the notch fitting part where the horizontal plate part fits is provided at the cutting edge, it is necessary to fix these without the step between the corner member, the side edge and the cutting edge. The appearance can be refreshed. Also, by fitting the vertical plate part and the horizontal plate part to the notch fitting part, the corner member can be firmly fixed to the side edge and cutting edge, increasing rigidity and extending life and improving reliability. can do.

According to the invention of claim 4, since the convex curved surface of the corner member is formed by a spherical surface or a spherical surface forming a part of an ellipsoid, when the curved surface of the corner member collides with a wall surface or the like. Impact can be mitigated regardless of the angle,
It is possible to prevent damage to the wall surface.

[Brief description of drawings]

FIG. 1 is an external perspective view showing an enlarged bucket according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view showing the bucket of FIG. 1 with a corner member disassembled.

FIG. 3 is an external perspective view showing enlarged left and right corner members.

FIG. 4 is an operation explanatory view showing a state in which the bucket according to the present embodiment collides with the inner wall surface of the earth and sand container.

FIG. 5 is a partially cutaway front view showing a hydraulic excavator using a bucket according to the related art together with a barge and a barge.

FIG. 6 is an external perspective view showing the bucket in FIG. 5 in an enlarged manner.

FIG. 7 is a plan view showing a hydraulic excavator that is performing a hoisting work in a state where an upper revolving structure is swung.

FIG. 8 is an operation explanatory view showing a state in which the bucket collides with the inner wall surface of the earth and sand container.

[Explanation of symbols]

21 buckets 22 Bottom plate 23 Side plate 24 side edge 24A, 25A Notch fitting part 25 cutting edges 27 corner members 28 Vertical plate part 29 Horizontal plate 30 convex curved surface W1, W2, W3 welds (welding means)

─────────────────────────────────────────────────── ─── Continuation of front page (72) Masayuki Ebisawa, 3-5-11 Nihonbashi Honcho, Chuo-ku, Tokyo Sanwa Machinery Co., Ltd. (72) Masami Ohata 2-6, Otemachi, Chiyoda-ku, Tokyo No. 2 in Hitachi Construction Machinery Co., Ltd. (56) References Patent 106180 (JP, C2) Actual development 3-122138 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) E02F 3 / 40 E02F 9/28

Claims (4)

(57) [Claims] 1. A bottom plate, side plates provided on both left and right sides of the bottom plate, side edges provided on the opening side of each side plate, and a tip of the bottom plate located between the side edges. In a bucket composed of a cutting edge provided on the side, a corner member having an outer peripheral surface having a convex curved surface is fixedly provided at a corner connecting the side edges and the cutting edge. And a bucket. 2. The bucket according to claim 1, wherein the side edge, the cutting edge, and the corner member are integrally fixed by welding means. 3. The corner member includes a vertical plate portion extending upward and downward, a horizontal plate portion extending leftward and rightward, and a convex curved surface portion formed between the vertical plate portion and the horizontal plate portion. The side edge is provided with a notch fitting portion to which the vertical plate portion is fitted,
The bucket according to claim 1, wherein the cutting edge is provided with a notch fitting portion into which the horizontal plate portion fits. 4. The bucket according to claim 1, wherein the convex curved surface of the corner member is formed by a spherical surface forming a part of a spherical body or an ellipsoid.