JP3456679B2 - Rock excavator - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rock excavator for excavating hard rocks such as tunnels and tunnels that are hard and highly abrading, and more particularly to a rotary drive disk cutter capable of turning and moving up and down by an excavating boom. The present invention relates to an excavator equipped with a plurality of rotating shafts having a disc cutter rotatably attached to a unit.

[0002]

2. Description of the Related Art Conventionally, as a rock excavator for tunnels, tunnels, etc., for example, a tunnel excavator with a boom (rod header, boom header) transmits a driving force from a drive motor to a transmission shaft via a reduction gear, The excavation drum attached to the transmission shaft was rotated to excavate rock with an excavation pick fixed to the drum.

The above conventional rock excavator is shown in FIGS.
As shown in, the base 2 is provided on the self-propelled crawler 1,
A conveyor 3 is pivotally attached to the center of the base 2, and a crushing rock scraping device 4 is provided at the front of the conveyor 3.
A scraping claw 5 is rotatably attached to this. A rear support bracket 7 of the excavation boom 6 is attached to the front part of the base 2 by a swivel bearing 8 so that the excavation boom 6 can swivel in the horizontal direction. The excavating boom 6 can be swung in the vertical direction with respect to the support bracket 7 by the boom vertical swing cylinder 10. An excavating drum 11 having a large number of picks around the excavating boom 6 is detachably attached to the tip of the excavating boom 6. The excavating drum 11 is pressed against a rock surface by a pressing cylinder 12 via a support 13. It Further, a driver's cab 14, a motor drive hydraulic unit, etc. are arranged on the base 2. Reference numeral 15 is an outrigger of the rock excavator.

Further, like the tunnel excavating machine disclosed in Japanese Examined Patent Publication No. 59-27836, the boom is attached to the main body through a slewing ring, and the boom, on the one hand, is provided with a trunnion which is vertically movable. It is attached to the slewing ring via the slewing ring, and the slewing ring can be pivoted by a jack and the boom can also be moved up and down by the jack. With such a structure, the drum is driven to rotate while jetting high-pressure water, the drum is penetrated into the rock, and the slewing ring is swung to move the boom left and right and up and down to move the rock right and left. It is known to dig up and down with a digging drum.

The pick on the front surface of the drum is pressed against the rock by the reaction force of the machine body, and the side pick during excavation is pressed against the rock by the pressing jack for the boom, and the rock is excavated by the rotating torque given to the tip of the pick. In this tunnel excavator, the boom supporting the transmission shaft is attached to the excavator body via the slewing ring,
The boom and the slewing ring are attached to the excavator body via a jack so that the boom and the slewing ring can be swung up and down.

A cutter head for an excavator of this type is known from Japanese Patent Publication No. 56-51279. The cutter boom 1 has a vertical axis 2 and a horizontal axis 3 related to the chassis of the excavator 4. Is arranged to perform a pivotal movement about the. A pair of abacus ball-shaped cutter heads 6 and 7 equipped with cutter bits are arranged on both sides of the front end portion 5 of the cutter boom 1 so as to be rotatable around an axis 8. The advance of the cutting head
This is done by alternating pivoting of the cutter boom about the vertical axis 2 in the direction of arrows 9 and 10. When the cutting head 7 advances in the direction of the arrow 9, it excavates,
On the other hand, the cutting head 6 excavates when it advances in the direction of the arrow 10.

Further, the conventional tunnel excavator is actually fair 6-
As described in Japanese Patent No. 34467, an excavating drum 5 in which a plurality of picks 4 are planted is attached to a tip portion 3 of a drum driving rotary shaft 2 in a boom 1. As the mounting structure, the outer peripheral portion of the flange 7 provided on the base of the cylindrical boss 6 is fixed inside the excavating drum body 5 by welding or the like,
The integrated product is inserted and fitted with a protrusion on the inner surface of the boss 6 in a spline groove 8 formed in the tip portion 3 of the rotary shaft 2, and tightened with a bolt 9 from the surface of the drilling drum main body 5 via the boss 6. I wore it.

[0008]

However, in the tunnel excavating machine disclosed in Japanese Patent Publication No. 59-27836, the drum is driven to rotate while jetting high-pressure water, the drum penetrates into rocks, and the through Rocks are excavated left and right and up and down by an excavating drum by rotating the boom and moving the boom up and down, and the excavation by the cutting device described in Japanese Patent Publication No. 56-51279 is a cutter bit. This is done by alternately turning a pair of cutter heads 6 and 7 in the shape of an abacus bead with a cutter boom around the vertical axis 2, and the tunnel moat disclosed in Japanese Utility Model Publication No. 6-34467. All of the shaving machines are equipped with a drilling drum 5 in which a plurality of picks 4 are planted on the tip 3 of the drum driving rotary shaft 2 in the boom 1. Attached, and performs drilling the drilling drum 5 driven to rotate.

Therefore, as described above, all the conventional rock excavators such as tunnels and tunnels excavate rocks by the excavation drum in which the picks or bits are planted, and therefore the picks or bits are always worn during excavation. Then
Moreover, rocks are finely cut to generate dust, which requires a sprinkler and a dust collector. In addition, in the rock excavation using these conventional excavation drums, there is a drawback that the driving power for excavation becomes large because the rock is cut more finely than necessary by a large number of picks or bits.

Further, when excavating hard rocks such as tunnels and tunnels that are hard and highly abrading, the driving power for excavation is required to be much larger, and conversely, the driving power for excavation is too large. When used, the pick or bit mounted on the excavating drum was destroyed.

The present invention has been made in view of the above circumstances, and is peeled off from a free surface of rock by a disk cutter rotatably attached to a rotary drive disk cutter unit capable of turning and vertically moving. An object of the present invention is to provide a rock excavator that requires only a small excavation power for excavation, has a simple structure, has excellent excavation efficiency, has a small amount of wear of a disc cutter, and can reduce dust generation extremely.

[0012]

In order to achieve the above object, the present invention provides a rock excavator in which an excavating boom having a disc cutter unit rotatably mounted at the tip thereof is disposed so as to be rotatable and vertically movable. A rotary driving force is transmitted to the disk cutter unit arranged on the excavation boom, and rock excavation is performed by the disk cutters at the tips of a plurality of freely rotatable rotary shafts equipped on the rotating disk cutter unit. In a rock excavator equipped with a disc cutter unit rotatably attached to the tip of the excavator boom so that the excavator boom can be rotated and moved up and down, the rotational driving force of a prime mover mounted on the excavator boom is reduced by a reducer. The disc cutter unit is transmitted to the disc cutter unit, and a plurality of rotary shafts equipped with disc cutters are freely rotatably attached to the disc cutter unit. It attached to said, it is characterized in that attached to the free disk cutter unit rotated by further 2 or more bearing multiple rotary shaft provided with a disc cutter having a truncated cone shape at the tip.

[0013]

Next, the operation of the present invention will be described. When excavating a face face, the excavating boom is driven to rotate and vertically move the disk cutter unit, and the rotational driving force of the prime mover mounted on the excavating boom is applied. The speed is reduced by a reducer, and this is transmitted to the disc cutter unit to drive the disc cutter unit to rotate, and at that time, a plurality of freely rotating rotary shafts equipped with disc cutters equipped on the rotating disc cutter unit rotate on their own axes. On the other hand, it is revolved and excavated by a frustoconical disc cutter so that the peripheral edge of the frustoconical disc cutter bites into the free surface of the rock. Therefore, excavation efficiency is good even for hard rocks with high wear resistance, the wear of the disk cutter is small, and the rock mass excavated is large, and the rock is broken by the inclined surface of the disk cutter, so that dust is less generated.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a rock excavator according to the present invention will be described with reference to the drawings. FIG. 1 is a front view of the present embodiment, and FIG. 2 is a plan view of the present embodiment. In the drawing, the same or equivalent parts as those of the conventional rock excavator are designated by the same reference numerals and detailed description thereof will be omitted.

In this embodiment, as shown in FIGS. 1 to 4, a base 2 is provided on a self-propelled crawler 1, a conveyor 3 is pivotally attached to the center of the base 2, and a conveyor 3 is provided in front of the conveyor 3. The part is equipped with a crushing rock scraping device 4, to which a scraping claw 5 is rotatably attached. A rear support bracket 7 of the excavation boom 6 is attached to the front part of the base 2 by a swivel bearing 8 so that the excavation boom 6 can swivel in the horizontal direction. The excavation boom 6 is attached to the support bracket 7 by a horizontal pin 7A, and the excavation boom 6 can be vertically swung by a boom vertical swing cylinder 10. . The excavator boom 6 has a prime mover 16 and a reducer 1
7, a disc cutter unit 19 is attached to the tip of a drive rotary shaft 18 that transmits the rotation. The disc cutter unit 19 includes a plurality of rotary shafts 2 having a truncated cone-shaped disc cutter 20.
1 is rotatably mounted by a bearing 22 and is pressed by the pressing cylinder 12 against the free surface of the face rock F in the tunnel T.

Therefore, in the operation of this embodiment, the excavating boom 6 is excavated by pressing the disc cutter unit 19 against the face of the face by the boom left / right swing cylinder 9, the boom up / down swing cylinder 10, and the pressing cylinder 12 to swing and move up and down. When the rotational driving force of the prime mover 16 mounted on the boom 6 is reduced by the speed reducer 17 and transmitted to the disc cutter unit 19 via the drive rotation shaft 18 to drive the disc cutter unit 19 to rotate, the rotating disc cutter unit 19 rotates. A plurality of freely rotatable rotary shafts 21 equipped with disk cutters 20 are revolved while rotating on their own axis, and the face rocks F in the tunnel T are turned into free surfaces by the disk cutters 20 having a flat front surface and a truncated cone shape. On the other hand, excavation is done so that the peripheral edge bites in and peels off.

According to this embodiment, since the rotating shaft 21 of the disk cutter 20 equipped in the rotating disk cutter unit 19 revolves around its own axis, the peripheral edge of the rock F is formed on the rock F by the truncated cone disk cutter 20. It can be drilled like biting and stripping. Therefore, rocks are crushed by tensile force even for hard rocks that are hard and highly wearable, so excavation efficiency is good, and since the excavation portion of each rotary shaft is freely rotatable, wear of the disc cutter 20 during excavation is small. Moreover, since the rock mass excavated is large and the rock is broken by the inclined surface of the disk cutter 20, there is an effect that dust is less generated.

[0018]

According to the present invention described above, an excavating boom having a disc cutter unit rotatably mounted at its tip is disposed so as to be rotatable and movable up and down, and the rotational driving force of a prime mover mounted on the excavating boom is reduced. Since the disc cutter unit is transmitted to the disc cutter unit via a machine to drive the disc cutter unit to rotate, a plurality of freely rotatable rotary shafts equipped with the disc cutter unit that rotates is revolved while rotating on its own axis. The disc cutter having a truncated cone shape can be excavated so that its peripheral edge bites into and peels off the free surface of the face rock while rotating and revolving.

Therefore, rocks are crushed by a tensile force even for hard rocks that are hard and highly wearable, so that excavation efficiency is good,
Further, since each disk cutter is freely rotatable, there is little wear at the time of excavation, and since the rock mass excavated is large and the rock is divided by the inclined surface of the disk cutter, there is an effect that less dust is generated.

[Brief description of drawings]

FIG. 1 is a plan view of the present embodiment.

FIG. 2 is an enlarged partial cross-sectional view of a main part of this embodiment.

FIG. 3 is an enlarged front view of a main part of the present embodiment.

FIG. 4 is a side view of the present embodiment.

FIG. 5 is a side view of a conventional example.

FIG. 6 is a plan view of a conventional example.

[Explanation of symbols]

1 self-propelled crawler 2 bases 3 conveyors 4 scraping device 5 scraping claw 6 excavation boom 7 Rear support bracket 8 Slewing bearing 9 Boom left and right turning cylinder 10 Boom vertical swing cylinder 12 Press cylinder 13 Support 14 cab 15 Outrigger 16 prime mover 17 reducer 18 Drive rotation axis 19 Disc cutter unit 20 Disk Cutter 21 rotation axis 22 Bearing F face rock T tunnel

Claims (3)

(57) [Claims] 1. A rock excavator in which an excavating boom having a disc cutter unit rotatably mounted at its tip is capable of rotating and moving up and down, and a rotational driving force is transmitted to the disc cutter unit disposed in the excavating boom. The rock excavator is characterized in that the rock excavator is excavated so that the rock is peeled off by the disc cutters at the tips of a plurality of freely rotatable rotary shafts equipped in the rotating disc cutter unit. 2. A rock excavator in which an excavating boom having a disc cutter unit rotatably mounted at its tip is arranged to be rotatable and movable up and down, and a rotational driving force of a prime mover mounted on the excavating boom is transmitted via a speed reducer. A rock excavator characterized in that a plurality of rotary shafts provided with disk cutters are rotatably attached to the disk cutter unit and transmitted to the disk cutter unit. 3. The rock excavation according to claim 1 or 2, wherein two or more rotary shafts each having a truncated cone-shaped disc cutter at its tip end are rotatably attached to the disc cutter unit by bearings. Machine.