JP2000017683A - Mixing bucket - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mixing bucket, by which excavation resistance at the time of the excavation of a ground or scooping-up resistance at the time of the scooping-up of mass granules is reduced. SOLUTION: When a shaft 24 bridged between the front-section plate 28 and root-section plate 29 of a bucket body 23 is rotated by a hydraulic cylinder 27, agitating blades 25 unified with the shaft 24 are turned. Consequently, articles to be agitated in the bucket body 23 are agitated. Agitating bodies 26 are formed in a vertical type at that time. As a result, the hydraulic cylinder 27 can be installed on the root-section plate 29 of the bucket body 23 singly without arranging power transmission systems on the external surfaces of bucket side plates 30 as seen in a conventional horizontal type. Accordingly, excavation resistance at the time of the excavation of a ground and scooping-up resistance, etc., at the time of the scooping-up of mass granules can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mixing bucket attached to the tip of an arm of a shovel-type civil engineering machine, and more particularly, to a mixing bucket connected to the tip of an arm of a civil engineering machine such as a power shovel, a hydraulic shovel, and a shovel loader. For example, the present invention relates to a mixing bucket used for soil improvement work on the ground.

[0002]

2. Description of the Related Art In civil engineering works, for example, when the ground at the site is soft, a solidified material made by mixing cement or lime is sprayed on the surface of the soil, and these are excavated and stirred at the site. Later, a backfilling technique of backfilling has been developed. For these operations, a shovel-based civil engineering construction machine may be used. Generally, such a civil engineering construction machine is provided with a mixing bucket having a stirring function at the tip of an arm. Conventionally, as this mixing bucket, for example, Japanese Patent Publication No. 7-111063
The "bucket with a mixing device" disclosed in Japanese Patent Application Laid-Open Publication No. HEI 9-163, for example, is known.
This conventional bucket is composed of a bucket body attached to the tip of an arm, a stirring body supported in the bucket body and having stirring blades implanted on the outer peripheral surface of a rotating shaft, and a drive for rotating the stirring body. Section. In addition, this rotating shaft is suspended between both side plates of the bucket body.

[0003]

However, according to such a mixing bucket of the prior art, the mixing shaft is a horizontal stirring member in which the rotation shaft of the stirring member is suspended between both side plates of the bucket body. . Therefore, a drive unit such as a hydraulic motor projects outward from the side plate of the bucket body,
A power transmission system connecting the output shaft and the rotary shaft of the hydraulic motor also protrudes outside the side plate. As a result, when excavating the ground, there has been a problem that these overhangs have relatively large excavation resistance and excavation cannot be performed smoothly. This is also referred to as a shovel loader (wheel loader) having a stirring function in a shovel bucket. Therefore, it is conceivable to house the hydraulic motor in the bucket body or in the rotating shaft. However, this causes another problem that the internal volume of the bucket becomes small (when the bucket is stored in the rotary shaft, the rotary shaft becomes large in diameter and the internal volume becomes small).

[0004] The shovel loader referred to here is a tire traveling type vehicle that scoops up bulk materials such as coal, iron ore, earth and sand, asphalt aggregates, and waste materials and transports them to a destination. The bulk material scooped up by the shovel bucket is transported to the destination while being scooped up or while being vibrated during transportation. Therefore, during this time, the bulk materials in the shovel bucket are separated due to differences in particle size, material, specific gravity, and the like, and are likely to be in an uneven loading state. Therefore, for example, when the bulk material is a roadbed material, the transported roadbed material becomes uneven when discharged on a predetermined road surface. Therefore, as described above, if the shovel bucket is provided with the stirring function, the bulk material can be stirred and the homogenization process can be performed during transportation.

In the case of the bucket with a mixing device disclosed in Japanese Patent Publication No. 7-111063, a pulley and a belt, or
A power transmission system including a sprocket, an endless chain, and a casing that covers these from the outside in a watertight manner is attached. As a result, there has been a problem that such a stirring device as a whole becomes large and the weight is bulky. Further, in the bucket with a mixing device disclosed in Japanese Patent Publication No. 7-111063, a slit-shaped outlet for directly dropping and backfilling the soil after stirring and mixing into the soil surface after excavation is provided at the bottom of the bucket body. It is only provided for.
Therefore, for example, in a construction site where the surrounding situation is different individually, rather than dropping the mixed soil directly below,
In some cases, it may be more convenient to drop it to the side.
In such a case, the related art cannot cope.

[0006]

The object of the present invention is to provide an excavation resistance when excavating ground,
Or, to provide a mixing bucket that can reduce the scooping resistance at the time of scooping the bulk powder granules,
That is the purpose. It is another object of the present invention to provide a mixing bucket that can prevent damage to a drive unit during excavation or scooping and that can be made compact. Another object of the present invention is to provide a mixing bucket that can be made compact and lightweight. Furthermore, the present invention provides a mixing bucket capable of discharging the agitated material by the agitator to the side of the bucket.
That is the purpose. Further, the present invention provides a mixing bucket that can increase the stirring efficiency of the stirring material and, when a discharge port is provided at the bottom of the bucket body, can discharge the stirring material smoothly.
That is the purpose.

[0007]

According to a first aspect of the present invention, there is provided a bucket body attached to a tip of an arm of a shovel-based civil engineering machine, and an outer periphery of a rotating shaft supported in the bucket body. In a mixing bucket including a stirrer having a stirring blade implanted on a surface thereof and a drive unit for rotating the stirrer, a rotating shaft of the stirrer is connected to a tip of the bucket body and the arm. The mixing bucket has a drive unit attached to the base of the bucket body.

Excavator-based civil engineering machines include power shovels, hydraulic shovels, shovel loaders (wheel loaders), and the like. Examples of the object to be stirred include, in addition to excavated soil, bulk materials such as coal, iron ore, earth and sand, asphalt aggregate, and waste material. The structure of the bucket body is not limited. For example, an outlet for discharging the agitated material after agitation may be formed on the side and / or the bottom of the bucket body. Further, the outlet may not be formed. The number of the stirring bodies may be one or a plurality of the stirring bodies. The number of stirring blades is 1
One sheet or a plurality of sheets may be used. However, for example, about 5 to 10 sheets are preferable so that the object to be stirred can be favorably stirred. Examples of the driving unit include a hydraulic cylinder, an electric cylinder, and an electric motor. Further, the mounting position of the rotating shaft may be at both ends or the center as long as it is between the leading end and the leading end of the bucket body.

According to a second aspect of the present invention, the driving portion is housed in an internal space formed between a base portion of the bucket body and a bucket reinforcing frame fixed to an outer surface of the base portion. The mixing bucket according to claim 1, wherein The bucket reinforcing frame is a frame member that is fixed to the outer surface of the base and reinforces a portion of the bucket body that is attached to the arm. Usually, it has a gutter shape. The shape and size of the internal space are not limited. Normally, the shape follows the shape of the bucket reinforcing frame.

Further, the invention according to claim 3 is the mixing bucket according to claim 1 or 2, wherein an output shaft of the drive unit is directly connected to a rotation shaft of the agitator. The output shaft and the rotating shaft may be welded or connected by a coupling.

Further, the invention described in claim 4 is:
The mixing according to any one of claims 1 to 3, wherein a discharge port for discharging the agitated material after stirring is provided at a side portion of the bucket body or at a side portion and a bottom portion of the bucket body. It is a bucket. The shape, size,
The number is not limited. For example, the shape may be a slit shape, a lattice shape, a round hole shape, or an elliptical hole shape.

According to a fifth aspect of the present invention, in the bucket body, a plurality of agitators are arranged side by side at a predetermined interval from each other. It is a mixing bucket of an item. The driving unit for rotating the stirrer may be a plurality of units corresponding to the stirrer,
One unit that is driven collectively may be used. The rotation direction of each stirrer may be any direction. However, if adjacent objects are rotated inwardly (rotation toward the center of the bottom of the bucket), when a discharge port is provided at the bottom of the bucket body, the agitated material after stirring is discharged from this discharge port. be able to. In addition, when the outer rotation is performed in the opposite direction, when the outlets are provided on both sides and the bottom of the bucket body, the agitated material is almost uniformly discharged from the three directions through these outlets. can do.

[0013]

According to the present invention, when the drive unit rotates the rotating shaft bridged between the leading and trailing portions of the bucket body, the stirring blades rotate. As a result, the object to be stirred in the bucket body is stirred. At this time, the agitating body of the present invention is a vertical type that is phased by approximately 90 degrees with respect to a conventional horizontal type that is laid between both side plates of a bucket body (hereinafter, this state is referred to as a vertical type). Do). In addition, since the vertical type is used, the drive unit of the agitator, like a conventional bucket, does not need to have a large power transmission system along the outer surface of the side plate, for example. Can be attached to the part. This makes it possible to reduce the excavation resistance at the time of excavating the ground or the scooping resistance at the time of scooping the agglomerates.

In particular, according to the second aspect of the present invention, the driving unit is housed in the internal space between the base of the bucket body and the bucket reinforcing frame, so that the driving unit can be used during excavation or scooping. The drive unit can be prevented from being damaged, and the mixing bucket can be made compact.

According to the third aspect of the present invention, the output shaft of the drive section is directly connected to the rotary shaft, so that the size, weight and cost of the mixing bucket can be reduced at the same time.

Further, according to the invention described in claim 4,
The agitated material stirred by the agitator is discharged to the outside of the bucket from a side portion of the bucket body, or a discharge port on the side portion and the bottom portion. As a result, the stirrer by the stirrer can be discharged to the side of the bucket in accordance with the situation at the site.

Further, according to the invention described in claim 5, the plurality of stirring bodies are rotated to stir the object to be stirred. Since a plurality of stirrers are provided, the stirring efficiency of the stirrer can be increased. In addition, when this is applied to claim 4, the agitated agitated material is discharged out of the bucket from the side portion of the bucket body or the discharge ports on the side portion and the bottom portion. For example, when adjacent stirrers are rotated inside each other, the stirrer can be collected at the center of the bucket body and can be smoothly discharged from the discharge port at the bottom of the bucket. When the bucket is rotated outside, the agitated material can be almost uniformly discharged from the three directions of both sides and the bottom of the bucket body.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An extension arm for extending an arm according to an embodiment of the present invention will be described below. First, the mixing bucket of the first embodiment will be described. FIG.
FIG. 1 is a front view of a mixing bucket according to a first embodiment of the present invention. FIG. 2 is a perspective view of a hydraulic shovel to which the mixing bucket according to the first embodiment of the present invention is applied. FIG. 3 is a side view of the mixing bucket according to the first embodiment of the present invention.

In FIG. 2, reference numeral 10 denotes a mixing bucket according to an embodiment of the present invention. The mixing bucket 10 is attached to a tip of an arm 13 supported by a tip of a boom 12 of a hydraulic shovel 11. I have. In FIG. 2, reference numeral 16 denotes a traveling device of the excavator 11, 17
Is a first hydraulic cylinder which is attached to the revolving body 17, 18 is attached to the revolving body 17, and rotates the boom 12 by inserting and removing the rod 18a, 19 is attached to the boom 12, and the arm 13 is rotated by inserting and removing the rod 19a. A second hydraulic cylinder 20 is a third hydraulic cylinder that is attached to the arm 13 and that rotates the mixing bucket 10 by inserting and removing the rod 20a. Less than,
The structure of the mixing bucket 10 will be described in detail.

As shown in FIGS. 2 and 3, the mixing bucket 10 is mainly composed of a bucket body 23 which is axially mounted on the tip of the arm 13 via two brackets 22 each having two bearings 21. And a stirrer 26 pivotally supported in the bucket body 23, and a hydraulic motor 27 which is an example of a driving unit that rotates the stirrer 26. The bucket main body 23 mainly includes a pair of side plates (side portions) 30 spaced apart from each other by a predetermined distance, and a front plate (front portion) 28 and a base plate (base portion) 29 connecting ends of the both side plates 30. And a discharge port 31 at the bottom of the bucket body 23 for discharging the agitated material after stirring. At one end of the front plate 28, five claws 28a protrude at a constant pitch. The pair of brackets 22 project from the base plate 29 at predetermined intervals.

A guide plate 30a for projecting excavated soil into the bucket protrudes from the outer surface of the distal end portion of both side plates 30. On the outer surface of the base plate 29, a bucket reinforcement frame 32 having the same length as the base plate 29 and having a downward gutter shape in FIG. 3 is fixed. As a result, this base plate 29
A laterally long internal space S is formed between the bucket and the bucket reinforcing frame 32. The hydraulic motor 27 is provided upright in the middle of the internal space S. Note that the outlet 31 is provided in the vertical frame 3
3 and a discharge port formed by assembling the horizontal frame 34 in a lattice shape. The agitator 26 includes a rotating shaft 24 and the rotating shaft 2.
Four sets (a total of 8 sets) arranged 180 degrees from each other
) Of stirring blades 25. The rotary shaft 24 is a hollow shaft, and is vertically mounted between a front plate 28 and a base plate 29 via a pair of bearings 36 each having a bearing support bracket 35 as a mounting base. I have. Further, one end of the rotary shaft 24 and the tip of the output shaft of the hydraulic motor 27 are directly connected via a coupling 37. These stirring blades 25 are implanted so as to be uniform in the entire circumference by changing the position in the axial direction of the rotating shaft 24.

Next, a description will be given of a soil improvement work of the ground at the site by the hydraulic excavator 11 to which the mixing bucket 10 is applied. As shown in FIG. 2, a predetermined amount of a solidifying material is sprayed on the ground on which soil improvement work is to be performed in advance. Further, the stirring body 26 is rotated by the hydraulic motor 27 in a predetermined direction, for example, at a rotation speed of 30 to 180 rpm. Next, the excavator 11 is moved to this site by the traveling device 16, and thereafter, the revolving body 17 is horizontally rotated, and the boom 12 and the arm 13 are rotated, so that
The ground is excavated by the mixing bucket 10 linked to the tip of the arm 13. The excavated soil and its solidified material are stirred by the stirring blades 25 of the rotating stirring body 26. Then, the agitated material is transferred to the bucket body 23.
Is discharged from the lattice-shaped discharge port 31 at the bottom of the base material, and falls as it is onto the ground as reformed soil.

As described above, the stirrer 26 is of a vertical type different from the conventional horizontal stirrer, so that, for example, a power transmission system (not shown) does not need to be extended along the outer surface of the side plate 30 to form the stirrer 26. The hydraulic motor 27 can be simply attached to the base of the bucket body 23. Therefore, part of the excavation resistance exerted during excavation due to the protruding power transmission system is eliminated. Further, since the hydraulic motor 27 is housed in the internal space S, damage to the hydraulic motor 27 during excavation can be prevented. In addition, the size of the mixing bucket 10 can be reduced. Further, the output shaft of the hydraulic motor 27 is
4, the mixing bucket 10 becomes more compact. Moreover, at the same time, the weight and cost can be reduced.

Next, a mixing bucket according to a second embodiment of the present invention will be described with reference to FIGS.
FIG. 4 is a front view of a mixing bucket according to a second embodiment of the present invention. FIG. 5 is a side view of a mixing bucket according to a second embodiment of the present invention. As shown in FIGS. 4 and 5, the mixing bucket 40 of the second embodiment
The agitated material (modified soil) after agitation is applied not only to the discharge port 31 formed at the bottom of the bucket body 23 but also to the side plate 30A.
Are formed with five discharge ports 31A for discharging the air. These outlets 31A are formed in the left and right side plates 30A, respectively, in the form of a fifth die.

With this configuration, the agitated material is discharged from the outlet 31 at the bottom and the outlet 31A of the side plate 30A on the side in the rotation direction of the agitator 26. Therefore, the agitated material is transferred to the bucket body 23 according to the situation at the site.
Can be discharged to any side. In addition, outlet 3
If 1 is closed with a sealing plate or the like, the agitated material can be discharged only from this side. Other configurations, operations, and effects are the same as those of the first embodiment, and a description thereof will not be repeated.

Next, a mixing bucket according to a third embodiment of the present invention will be described with reference to FIG. FIG. 6 is a front view of a mixing bucket according to a third embodiment of the present invention. As shown in FIG. 6, a mixing bucket 50 according to the third embodiment uses a bucket main body 23A in which the bucket main body according to the second embodiment is elongated, and two mixing bodies 2 are used.
This is an example in which 6A and 26B are vertically arranged side by side at a predetermined interval. With such a configuration, the stirring efficiency of the stirring object can be increased. In addition, for example, by rotating both agitating bodies 26A and 26B inward, the agitated material is collected at the center side of the bucket body 23A, and the outlet 3
1 can be discharged smoothly. That is, the amount of discharge from the discharge port 31A of the both side plates 30A can be suppressed by selection. On the contrary, the stirring bodies 26A, 26A
If the rotation direction of B is directed outward, the agitated material can be almost uniformly discharged from the three directions through the discharge ports 31 and 31A. This allows the agitated material to be spread over a wide area of the site and returned. Other configurations, operations, and effects are the same as those of the second embodiment, and a description thereof will not be repeated.

[0027]

According to the present invention, the rotating shaft of the stirrer is hung between the tip of the bucket body and the base to which the arm is connected, and the drive is attached to the base. The excavation resistance when excavating the ground, or
Scooping resistance at the time of scooping the bulk powder can be reduced.

In particular, according to the second aspect of the invention, in addition to the effect of the first aspect, the driving unit is housed in the internal space between the base of the bucket body and the bucket reinforcing frame. Therefore, it is possible to prevent the drive unit from being damaged during excavation or scooping, and to reduce the size of the mixing bucket.

According to the third aspect of the present invention, in addition to the effect of the first or second aspect, the output shaft of the drive unit is directly connected to the rotary shaft, so that the mixing bucket can be made compact. Moreover, the weight and cost can be reduced.

Further, according to the invention described in claim 4,
In addition to the effects of any one of claims 1 to 3, in addition to the effects of any one of claims 1 to 3, a discharge port for discharging the agitated material after stirring is formed at a side portion of the bucket body or at a side portion and a bottom portion of the bucket body. Therefore, the agitated material by the agitator can be discharged to the side of the bucket.

According to the fifth aspect of the present invention, in addition to the effect of any one of the first to fourth aspects, a plurality of agitators are provided in the bucket body. Since the juxtapositions are arranged at predetermined intervals, the stirring efficiency of the stirrer can be increased. In addition, when the present invention is applied to claim 4, for example, by rotating the adjacent agitator inward, the agitated material can be smoothly discharged from the outlet at the bottom of the bucket body. On the contrary, by rotating adjacent stirring bodies outward from each other,
Through the outlets provided on both sides and the bottom of the bucket body, the agitated material can be discharged from the three directions almost uniformly.

[Brief description of the drawings]

FIG. 1 is a front view of a mixing bucket according to a first embodiment of the present invention.

FIG. 2 is a perspective view of a hydraulic shovel to which the mixing bucket according to the first embodiment of the present invention is applied.

FIG. 3 is a side view of the mixing bucket according to the first embodiment of the present invention.

FIG. 4 is a front view of a mixing bucket according to a second embodiment of the present invention.

FIG. 5 is a side view of a mixing bucket according to a second embodiment of the present invention.

FIG. 6 is a front view of a mixing bucket according to a third embodiment of the present invention.

[Explanation of symbols]

 10, 40, 50 mixing bucket, 11 hydraulic excavator (excavator-based civil engineering and construction equipment), 13 arm, 23, 23A bucket body, 24 rotating shaft, 25 stirring blade, 26 stirring body, 27 hydraulic motor (drive unit), 28 Front plate (tip), 29 base plate (base), 30, 30A side plate (side), 31, 31A outlet, 32 bucket reinforcing frame, S internal space.

Claims (5)

[Claims] 1. A bucket body attached to the tip of an arm of a shovel-based civil engineering construction machine, a stirring body pivotally supported in the bucket body and having stirring blades implanted on an outer peripheral surface of a rotating shaft; A mixing bucket provided with a drive unit for rotating the agitator, wherein a rotating shaft of the agitator is hung between a tip of the bucket body and a base of the bucket body to which the arm is connected, A mixing bucket in which the drive unit is attached to the base. 2. The mixing device according to claim 1, wherein the drive section is housed in an internal space formed between a base portion of the bucket body and a bucket reinforcing frame fixed to an outer surface of the base portion. bucket. 3. The mixing bucket according to claim 1, wherein an output shaft of the driving unit is directly connected to a rotation shaft of the stirring body. 4. The bucket body according to claim 1, further comprising a discharge port provided at a side portion of the bucket body, or a side portion and a bottom portion of the bucket body to discharge the agitated material after stirring. The mixing bucket according to the item. 5. The mixing bucket according to claim 1, wherein a plurality of agitators are arranged in the bucket body at predetermined intervals.