JP2002004320A - Excavating and agitating head for hydraulic shovel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an excavating and agitating head for hydraulic shovel which can further reduce working cost by further promoting mechanization so that the head may not excavate excessively and, accordingly, may not use a material to be kneaded excessively. SOLUTION: The excavating and agitating head of a hydraulic shovel 10 is provided with a bracket 16 which is attached to the front end of a boom arm 14 instead of the shovel bucket 12 of the shovel 10, a first motor 18 which is mounted on the bracket 16 and operated by the hydraulic pressure of the shovel 10, and a pair of excavating and agitating drums 24 on the peripheral surfaces of which many excavating and agitating blades 20 are planted in standing states and which are rotated by means of the same rotating shaft 22. The head is also provided with a drum holder 26 which clamps the central part of the rotating shaft 22 of the drums 24 so that the shaft 22 may become perpendicular to the boom arm 14, a first power transmitting mechanism 28 which is installed to the drum holder 26 and transmits the rotational output of the first motor 18 to the excavating and agitating drums 24, and a second motor 30 mounted on the bracket 16. In addition, the head is also provided with a second power transmitting mechanism which rotationally drives the drum holder 26 around the axis of the boom arm 14 by using the rotational output of the second motor 30 and a pedestal 161 which supports the drum holder 26 on the bracket 16.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a head for excavating ground and stirring concrete mounted on the tip of a boom arm in place of a shovel bucket of a hydraulic excavator for construction.

2. Description of the Related Art When constructing a concrete structure such as a dike or breakwater on a riverbank or a shore, as shown in FIG.
At 0, the ground is excavated, and then the form 2 is assembled as shown in FIG.

[0002] After curing of the cast concrete, form 2
Is removed and its location is backfilled, thus completing the foundation, providing the upper structure as in FIG.

[0003] However, since the ready-mixed concrete to be poured is transported from a concrete manufacturing plant by a mixer truck, a large amount of cost is required for the construction.

[0004] Therefore, as described below, cobbles, gravel and water on the ground excavated at the site are used as concrete materials.

In FIG. 5 and FIG. 6, a shovel 10 is a shovel bucket 1 provided at the tip of a boom arm 14.
2 excavates the ground 3 at the site close to the riverbank or the shore, piles up the boulders 4 and gravel 5 contained in the ground 3 of the excavation, and places the piled boulders 4 in the excavated place as shown in FIG. Lay only the height (several tens of centimeters).

Then, as shown in FIG. 8, the shovel bucket 12 attached to the tip of the boom arm 14 is removed, and a cutting / stirring head 100 is attached instead.

Further, as shown in FIG. 9, a slurry plant 8 is prepared, and a slurry injection section 9 is attached to a boom arm 14, and a slurry 7 of a cement-solidified material containing excavated gravel 5 is sprayed to an excavated portion. It is kneaded with the cobblestone 5 to be laid and the cutting / stirring head 100.

After curing, the steps of laying and kneading the cobblestones 4 are performed again, and finally the foundation of the multilayer is formed as shown in FIG. 10 and a concrete structure such as a dike as shown in FIG. Provided above.

[0009] Depending on the ground, the shovel bucket 1
Cutting / stirring head 1
The cutting and kneading operations can be performed simultaneously at 00, and when the gravel contains a large amount of water, only the cement powder can be injected.

FIG. 12 illustrates a hydraulic pipe of the shovel 10. An oil tank 102 is mounted on the shovel 10, and a low-pressure hose 104, a high-pressure hose 106, and a drain hose 108 are cut and stirred along the boom arm 14. It is extended to the head 100 and the relief valve 1
10, a check valve 112 and a stop valve 114 are provided.

FIG. 13 shows the configuration of a cutting / stirring head 100, in which a bracket 16 has a rectangular base plate 16a.
The wall 162 is formed upright on the bottom of the boom arm 14.

A hydraulic motor 18 is incorporated inside the bracket wall 162, and the hydraulic motor 18 is controlled by a control valve 116 shown in FIG. A spare control valve installed in the shovel bucket 12 is used as the control valve 116 and is operated from the cab of the shovel 10.

On the peripheral surfaces of the pair of excavating / stirring drums 24, a large number of excavating / stirring blades 20 (with a pick having a cemented carbide chip embedded in its holder) are planted. The stirring drum 24 rotates on the same rotation shaft 22.

Further, the drum holder 26 is
Of the drum holder 26 with the rotation shaft 22 at right angles to the boom arm 14.
Is gripped by

The drum holder 26 has a hydraulic motor 18
A reduction gear 28 is built in as a power transmission mechanism for transmitting the rotation output of the hydraulic motor 18 to the excavating / stirring drum 24. Note that a compact and high-performance type is used for the speed reducer 28.

As described above, the site is excavated to procure the concrete material, the excavated site is used as a concrete kneading vessel, and the excavator is used as a concrete kneading machine. While doing so, it is possible to perform construction efficiently.

Drilling / stirring drum 24
As the kneading operation is performed by the rotation of, as shown in FIG.
The portion of the excavation that is not kneaded remains at the bottom, and the strength of the concrete foundation is reduced as it is.

In order to eliminate the remaining kneading, the shovel must be moved around the excavation site. However, as is understood from FIGS. 6 and 10, construction is often carried out at the water's edge. Moving is difficult in most cases.

Conventionally, in order to eliminate the state as shown in FIG. 15, excavation was performed further to the outside to eliminate the unstirred portion (hatched portion) in FIG. 15, and stirring and kneading were performed in that state. However, this increases the area to be excavated extraly, and also increases the cost due to the necessity of using a lot of materials to be kneaded.

Thus, the present invention has been made in view of the above-mentioned problems, and does not require excessive excavation, so that the mechanization is further advanced so as not to use the material to be kneaded, thereby further reducing the operation cost. It is an object of the present invention to provide a digging / mixing head for a shovel that can perform the digging and stirring.

According to a first aspect of the present invention, a digging and stirring head 100 of a hydraulic shovel 10 includes a boom arm 14 instead of the shovel bucket 12 of the hydraulic shovel 10.
And a first motor 18 mounted on the bracket 16 and operated by the hydraulic pressure of the shovel 10, and a pair of excavating / stirring blades 20 set on the peripheral surface and rotating on the same rotating shaft 22. Excavating and stirring drum 24
A drum holder 26 for gripping the central portion of the rotary shaft 22 with the rotary shafts 22 of the two excavating / stirring drums 24 perpendicular to the boom arm 14, and a rotational output of the first motor 18 provided on the drum holder 26. Power transmission mechanism 28 for transmitting the power to the excavation / stirring drum 24, a second motor 30 mounted on the bracket 16, and the rotation output of the second motor 30 drives the drum holder 26 to rotate around the axis of the boom arm 14. And a pedestal 161 for supporting the drum holder 26 on the bracket 16.

The excavating / stirring head 100 of the hydraulic shovel 10 according to the second invention has a bracket 16 attached to the tip of a boom arm 14 instead of the shovel bucket 12 of the hydraulic shovel 10, and a shovel 10 mounted on the bracket 16. A first motor 18 operated by hydraulic pressure, and a plurality of excavating / stirring blades 20 set on the peripheral surface and
A pair of excavating / stirring drums 24 rotating at 2
A drum holder 26 for gripping the central portion of the rotating shaft 22 with the rotating shaft 22 of the stirring drum 24 perpendicular to the boom arm 14, and a first motor 18 provided on the drum holder 26.
A first power transmission mechanism 28 for transmitting the rotational output of the drum holder 24 to the excavating / stirring drum 24, a second motor 30 mounted on the bracket 16,
6 has a second power transmission mechanism that drives the rotation of the drum 6 about the axis of the boom arm 14, and a pedestal 161 that supports the drum holder 26 on the bracket 16. The first power transmission mechanism 28
The second motor 30 is mounted on the bracket 16 and operates with the hydraulic pressure of the shovel 10. The second motor 30 is configured by a speed reducer that reduces the rotational output of the first motor 18 to increase the torque and then transmits the torque to the excavation / stirring drum 24. Motor, the second
The power transmission mechanism includes a small-diameter first sprocket 36 attached to the output shaft of the second motor 30, a large-diameter second sprocket 38 rotatably supported by the pedestal 161 and connected to the drum holder 26, Sprocket 36 and second
A chain 40 wound around the sprocket 38 and transmitting the rotation output of the second motor 30 to the drum holder 26.

The hydraulic excavator 10 according to the third invention
The excavating / stirring head 100 includes a bracket 16 attached to the tip of a boom arm 14 instead of the shovel bucket 12 of the hydraulic shovel 10, a first motor 18 mounted on the bracket 16 and operated by the hydraulic pressure of the shovel 10,
A pair of excavating / stirring drums 24 having a large number of excavating / stirring blades 20 planted on the peripheral surface and rotating by the same rotating shaft 22, and a posture in which the rotating shafts 22 of both excavating / stirring drums 24 are perpendicular to the boom arm 14. A drum holder 26 for gripping the center of the rotating shaft 22, and a first motor 1 provided on the drum holder 26.
8, a second power transmission mechanism 28 for transmitting the rotation output of the motor 8 to the excavation / stirring drum 24, a second motor 30 mounted on the bracket 16, A first power transmission mechanism that includes a second power transmission mechanism that is driven to rotate around and a pedestal 161 that supports the drum holder 26 on the bracket 16;
Is constituted by a speed reducer that reduces the rotational output of the first motor 18 to increase the torque and then transmits the torque to the excavation / stirring drum 24. The second motor 30 is mounted on the bracket 16 and operates with the hydraulic pressure of the shovel 10. Hydraulic motor,
The second power transmission mechanism includes a small-diameter first sprocket 36 attached to the output shaft of the second motor 30, a large-diameter second sprocket 38 rotatably supported by the pedestal 161 and connected to the drum holder 26, A chain 40 wound around the first sprocket 36 and the second sprocket 38 and transmitting the rotational output of the second motor 30 to the drum holder 26;
67, 382 are formed on the bracket 16 and the large-diameter second sprocket 38, and the detent pin 44 is inserted into the through holes 167, 382.

According to these inventions, since the head 100 can be rotated by the second motor 30, the head 100
By rotating by 0 degrees, the kneading operation can be sufficiently performed on the bottom portion at the edge of the excavation site.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIG.
The base plate 160 bulges laterally, and the hydraulic motor 30 is mounted on the bulge portion.

The edge of the base plate 16 is slightly extended in the direction in which the boom arm extends, and has a bottomed short cylindrical shape. A lid plate 164 having the same shape as the base plate 160 is stacked on the opening. I have.

The base plate 160 and the cover plate 164
The pedestal 161 is formed by these.

FIG. 1 shows an exploded base plate portion. A mounting hole 166 is provided in a side bulge of the base plate 160, and the output shaft side of the hydraulic motor 30 is fitted therein.

A bolt hole 300 is provided around the mounting hole 166, and the washer 3
02 is fixed to the base plate 160 with bolts 304 (see also FIG. 17).

A spacer 306 and a small-diameter sprocket 36 are sequentially fitted on the motor output shaft inserted through the mounting hole 166, and a key 308 is inserted between the motor output shaft and the spacer 306 and the sprocket 36 are prevented from rotating. You. Therefore, the rotational driving force of the hydraulic motor 30 is transmitted to the sprocket 36.

Further, a plate 30 is attached to the end face of the motor output shaft.
9 and washer 310, bolt 312 is screwed in,
The plate 309 prevents the spacer 306 and the sprocket 36 from falling off.

The bulging portion of the cover plate 164 has a window hole 31.
4, the window hole 314 is closed by a cover 316, and the cover 316 is fixed to the cover plate 164 by using a washer 318 and a bolt 320 as shown in FIG.

The cover plate 164 includes the washer 170 and the bolt 1.
72 to the base plate 160,
It is set to 1.

A large-diameter sprocket 38 is accommodated in the internal space of the base 161 formed of a thick plate formed by the base plate 160 and the cover plate 164.

A chain 40 is wound around the large-diameter sprocket 38 and the small-diameter sprocket 36, so that the sprocket 38 is
6 and is rotationally driven by the hydraulic motor 30 with a large torque.

A large-diameter insertion hole 165 is provided in the cover plate 164 at a position below the large-diameter sprocket 38, and a large-diameter ring-shaped bracket 2 is provided on the upper surface of the drum holder 26.
60 is fixed.

The bracket 260 of the drum holder 26 is inserted into the large-diameter hole 165 of the cover plate 164, and is fixed below the inner peripheral edge of the large-diameter sprocket 38 using the washer 262 and the bolt 264.

In FIG. 19, the portion driven by the hydraulic motor 30 is indicated by hatching, and the motor output is transmitted to the drum holder 26 in the order of the small diameter sprocket 36, the chain 40, the large diameter sprocket 38, and the bracket 260, and The drum 30 is driven to rotate with a large torque by the motor 30.

The drum holder 26 can be rotated by manual operation. For this reason, the large diameter sprocket 38 is provided with through holes 382 (see FIG. 1) at 90-degree intervals.

On the base plate 160 and the lid plate 164, single through holes 167 and 169 are provided at positions between the wall 162 on one side and the mounting holes 166, respectively.
The cover 174 is attached to the cover plate 164 with screws 176 so that the lower side of the through hole 169 of the fourth is closed by the cover 174 (see FIG. 1).

When the bracket 260 is not rotating, the through hole 1
The pins 44 are inserted into them from above as shown in FIG. 20, and the lid 440 of the pin head is attached to the base plate 162 using the washers 442 and bolts 444 (see FIG. 21).

Here, when the bracket 260 rotates, the pin 44 is pulled out in advance. When the manual operation is performed, the pin 44 is inserted again after the rotation by 90 degrees, and the rotation of the bracket 26 is prevented.

FIG. 22 shows a hydraulic circuit. A control valve 117 is provided in parallel with the control valve 116, and the control valve 117 controls the motor 30.

As will be understood from the above description, the head 100 can be rotated by 90 degrees around the extension axis of the boom arm 14 by driving a motor or manually.

In the present invention, the rotation is not limited to the 90-degree rotation, and the rotation can be made at any angle.

During the kneading operation, as shown in FIG.
4 are positioned at right angles to the boom arm 14.

Next, the rotation of the excavating / stirring drum 24 is started, and the excavating / stirring drum 24 is moved forward and backward with respect to the shovel 10 as shown in FIG.

In this operation, since the bottom portion of the end side is not kneaded, the head 100 is rotated 90 degrees as shown in FIG. 25, and the same portion is kneaded.

Therefore, there is no remaining portion of the kneading operation.

As a result, the work efficiency is further improved, and the construction cost can be significantly reduced while further shortening the construction period.

As described above, according to the present invention, since the head rotates, the bottom portion of the excavation end can be kneaded smoothly, and therefore, no extra excavation is performed and no extra kneading material is used. It is possible to safely and efficiently construct a waterside concrete structure safely and at low cost without using a concrete structure.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a main part of a head to which the invention is applied.

FIG. 2 is an explanatory view of an excavation operation.

FIG. 3 is a work explanatory diagram of formwork assembly and concrete casting.

FIG. 4 is an explanatory view of a completed concrete structure.

FIG. 5 is an explanatory view of an excavation operation.

FIG. 6 is an explanatory view of an excavation operation.

FIG. 7 is an explanatory diagram of a cobblestone laying operation.

FIG. 8 is an explanatory diagram of a head replacement operation.

FIG. 9 is an explanatory view of a kneading operation.

FIG. 10 is an explanatory view of a multi-layer foundation.

FIG. 11 is an explanatory view of a concrete structure completed on a multi-story foundation.

FIG. 12 is an explanatory view of disposing hydraulic components.

FIG. 13 is a diagram illustrating the configuration of a conventional head.

FIG. 14 is an explanatory diagram of a hydraulic circuit.

FIG. 15 is an explanatory view of the remaining portion of kneading.

FIG. 16 is a perspective view of a main part of a head to which the invention is applied.

FIG. 17 is an explanatory view of mounting a hydraulic motor for rotating a head.

FIG. 18 is an explanatory view of mounting a cover.

FIG. 19 is an explanatory diagram of an operation when the head is rotated.

FIG. 20 is an explanatory view of a detent pin.

FIG. 21 is an explanatory view of mounting a rotation preventing pin.

FIG. 22 is an explanatory diagram of a hydraulic circuit.

FIG. 23 is an explanatory view of the posture of the head at the start of the kneading operation.

FIG. 24 is an explanatory diagram of the operation of the head during kneading work.

FIG. 25 is an explanatory view of the posture of the head at the start of the operation of the remaining kneading portion.

FIG. 26 is an explanatory view of the operation of the head during the operation of the remaining kneading portion

[Explanation of symbols]

 2 Formwork 3 Excavation ground 4 Cobblestone 5 Cobblestone 5 Gravel 7 Slurry 8 Slurry plant 9 Slurry injection unit 10 Shovel 12 Shovel bucket 14 Boom arm 16 Bracket 18 First motor 20 Excavating / stirring blade 22 Rotating shaft 24 Excavating / stirring drum 26 Drum holder 28 first power transmission mechanism (reducer) 30 second motor 36 small diameter sprocket 38 large diameter sprocket 40 chain 44 detent pin 100 excavation / stirring head 102 oil tank 104 low pressure side hose 106 high pressure side hose 108 drain hose 110 Relief valve 112 Check valve 114 Stop valve 116 Control valve 117 Control valve 160 Base plate 161 Base 162 Bracket wall 164 Cover plate 165 Insertion hole 166 Mounting hole 167 Through hole 69 through hole 170 washer 172 bolt 174 cover 176 screw 260 bracket 262 washer 264 bolt 300 bolt hole 302 washer 304 bolt 306 spacer 308 key 309 plate 310 washer 312 pinching bolt 314 window hole 316 cover 318 bolt 40 bolt 320 bolt Pin head lid 442 Washer 444 Bolt

Claims (3)

[Claims] 1. A bracket (16) attached to a tip of a boom arm (14) instead of a shovel bucket (12) of a hydraulic shovel (10), and is operated by hydraulic pressure of the shovel (10) mounted on the bracket (16). And a pair of excavating / stirring drums (2) having a plurality of excavating / stirring blades (20) planted on the peripheral surface and rotating on the same rotating shaft (22).
4) a drum holder (26) for gripping the central part of the rotary shaft (22) in a posture where the rotary shaft (22) of both excavating / stirring drums (24) is perpendicular to the boom arm (14); A first power transmission mechanism (28) provided on the holder (26) and transmitting the rotation output of the first motor (18) to the excavating / stirring drum (24); and a second motor (30) mounted on the bracket (16). )
And the drum holder (26) with the rotation output of the second motor (30).
And a pedestal (161) for supporting the drum holder (26) on the bracket (16), and a second power transmission mechanism for driving the drum holder (14) to rotate around the axis of the boom arm (14). Drilling and stirring head (1
00). 2. A bracket (16) attached to a tip of a boom arm (14) instead of a shovel bucket (12) of a hydraulic shovel (10), and operated by hydraulic pressure of the shovel (10) mounted on the bracket (16). And a pair of excavating / stirring drums (2) having a plurality of excavating / stirring blades (20) planted on the peripheral surface and rotating on the same rotating shaft (22).
4) a drum holder (26) for gripping the central part of the rotary shaft (22) in a posture where the rotary shaft (22) of both excavating / stirring drums (24) is perpendicular to the boom arm (14); A first power transmission mechanism (28) provided on the holder (26) and transmitting the rotation output of the first motor (18) to the excavating / stirring drum (24); and a second motor (30) mounted on the bracket (16). )
And the drum holder (26) with the rotation output of the second motor (30).
And a pedestal (161) for supporting the drum holder (26) on the bracket (16). The first power transmission mechanism (28) ) Is constituted by a speed reducer that reduces the rotational output of the first motor (18) to increase the torque and then transmits the torque to the excavation / stirring drum (24). The second motor (30) includes a bracket (16). The second power transmission mechanism comprises a small-diameter first sprocket (36) attached to the output shaft of the second motor (30), and a pedestal (36). 161) and is rotatably supported by the drum holder (2).
6), a large diameter second sprocket (38), a first sprocket (36) and a second sprocket (3).
8) a chain (40) wound around 8) for transmitting the rotation output of the second motor (30) to the drum holder (26).
00). 3. A bracket (16) attached to the tip of a boom arm (14) instead of the shovel bucket (12) of the hydraulic shovel (10), and operated by the hydraulic pressure of the shovel (10) mounted on the bracket (16). A first motor (18), and a pair of excavating / stirring drums (24), on which a number of excavating / stirring blades (20) are implanted on the peripheral surface and rotate on the same shaft (22).
A drum holder (26) for gripping the center of the rotary shaft (22) in a posture in which the rotary shaft (22) of both excavating / stirring drums (24) is perpendicular to the boom arm (14); 26) a first power transmission mechanism (28) for transmitting the rotation output of the first motor (18) to the excavation / stirring drum (24); and a second motor (30) mounted on the bracket (16).
And the drum holder (26) with the rotation output of the second motor (30).
And a pedestal (161) for supporting the drum holder (26) on the bracket (16). The first power transmission mechanism (28) ) Is constituted by a speed reducer that reduces the rotational output of the first motor (18) to increase the torque and then transmits the torque to the excavation / stirring drum (24). The second motor (30) includes a bracket (16). The second power transmission mechanism comprises a small-diameter first sprocket (36) attached to the output shaft of the second motor (30), and a pedestal (36). 161) and is rotatably supported by the drum holder (2).
6), a large diameter second sprocket (38), a first sprocket (36) and a second sprocket (3).
And a chain (40) wound around 8) and transmitting the rotation output of the second motor (30) to the drum holder (26).
67, 382) are formed in the bracket (16) and the large-diameter second sprocket (38), and the through holes (167, 3) are formed.
The excavation / stirring head (1) of a hydraulic shovel, characterized in that a pin (44) for preventing rotation is inserted into the excavator (82).
00).