JPS64476Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to an excavator.

Conventionally, excavators are equipped with only one type of excavation head, and when the soil quality is not uniform (for example, when the soil changes from soft rock to medium-hard rock to hard rock), a different excavation head or excavation head is installed for each soil type. This method has disadvantages in that the excavator itself has to be changed, which is uneconomical and reduces excavation efficiency.

Therefore, an object of the present invention is to provide an excavator that can eliminate the above-mentioned drawbacks.

That is, the present invention supports one end of a hollow rotary shaft through a first bearing at one end of an annular support, and attaches a first excavation head to the other end of the hollow rotary shaft.
A second excavation head is engaged and held in the first excavation head so as to be movable in the direction of its rotation axis, and a rotation drive device for rotating the hollow rotation shaft is provided on the annular support, and a rotary drive device is provided in the hollow rotation shaft. A rock drilling machine is supported movably in its axial direction via a second bearing, a cylinder device is interposed between the other end of the annular support body and the rock drilling machine, and the cylinder device expands and contracts, A drilling machine characterized in that the chisel of the rock drill is moved outwardly from a through hole formed in the center of the first drilling head. Since two excavation heads can be used separately, by attaching a different excavation bit to each excavation head, it is possible to immediately deal with changes in the soil quality of the excavated ground. If it is a rock, it can be excavated using the chisel of a rock drill, and therefore there is no need to replace the excavation head or excavation machine as in the past, which is economical and reduces the excavation efficiency. There isn't.

Hereinafter, one embodiment of the present invention will be described based on the drawings. 1 to 3, 1 is an annular support 2
It is a hollow rotary shaft whose one end is supported via a first bearing 3, and a cross-shaped first excavation head 4 having arm portions 4a on all sides is fixed to the other end via a key 5. has been done. Reference numeral 6 designates a second excavation head which is engaged and held in a recess 4b between the arms 4a, 4a of the first excavation head 4 so as to be movable back and forth in the direction of the rotation axis. That is, the rear end annular portion 6a of the second excavation head 6 is fitted onto the hollow rotary shaft 1, and the front end head portion 6b is divided into four parts in the shape of a quarter circle. In addition, in the center of the first excavation head 4,
A through hole 7 communicating with the inside of the hollow rotating shaft 1 is formed. Furthermore, in the first excavation head 4,
A first drilling bit (for example a roller bit) 8 and a second drilling bit 9 (for example a regular cutter bit) 9 which is different from the first drilling bit 8 are provided in the second drilling head 6 . 10 connects the first and second excavating heads 4,
6 is attached to the annular support 2. That is, a ring gear 11 is provided on the outer periphery of the outer ring of the first bearing 3 to which the hollow rotating shaft 1 is connected.
is attached to the ring gear 11, and a pinion 12 attached to the output shaft 10a of the rotary drive device 10 is meshed with the ring gear 11. Reference numeral 13 denotes a cylindrical body which is held on the outer periphery of the intermediate part of the hollow rotating shaft 1 via a pair of front and rear third bearings 14 so as to allow rotation of the hollow rotating shaft 1, and the rear end thereof has a pair of left and right connecting arms 15. It is connected to the annular support 2 via the annular support 2 .
Reference numeral 16 denotes a first cylinder device for moving the second excavating head 6 back and forth along the rotation axis, the base end of which is supported at the rear portion of the outer periphery of the cylindrical body 13, and a second cylinder device 16 at the tip of the rod 16a. drilling head 6
A rotary piece 18 is attached that can roll within an annular groove 17 formed on the outer periphery of the rear end annular portion 6a.
Note that 19 is a bearing. In addition, the above rotating top 1
8 and the first cylinder device 16 are provided, for example, two at 180° symmetrical positions. 20 is the second bearing 2
A rock drilling machine is supported within the hollow rotating shaft 1 via the hollow rotating shaft 1 so as to be rotatable around its axis, that is, to allow rotation of the hollow rotating shaft 1 and to be movable in the axial direction. The chisel 20a is positioned in the hollow portion at the tip of the hollow rotary shaft 1 and in the through hole 7 of the first excavation head 4. And this jackhammer 2
0 is moved back and forth in the axial direction of the hollow rotating shaft 1 by the second cylinder device 22, and is moved in the direction of arrow A in FIG.
As shown, the chisel 20a moves in and out of the front surface of the first excavation head 4. That is,
The rear end of the rock drill main body 20b is connected to a support plate 24 via a pin 23, and the support plate 24 is connected to the other end of the annular support 2 via a plurality of second cylinder devices 22. ing. Note that 25 is a sealing material interposed between the through hole 7 and the chisel 20a, and 26 is a power supply hose for the rock drill 20. Reference numeral 27 denotes a support base that supports the first and second excavation heads 4 and 6 and the hollow rotary shaft 1 so as to be able to swing in a vertical plane via the annular support member 2; A pair of left and right third cylinder devices 28 are interposed between the excavation heads 4 and 6, and the first and second excavation heads 4 and 6 are swung in the direction of arrow B. That is, horizontal support pins 29 are provided protrudingly on both sides of the annular support 2, and the horizontal support pins 29 are swingably supported by a pair of left and right first brackets 30 erected on the upper surface of the support base 27. Furthermore, one end of each third cylinder device 28 is connected to a second bracket 31 that respectively projects rearward from the support base 27, and the other end is connected to a second bracket 31 that also projects rearward from the annular support 2. 3 bracket 32. Further, a swing bearing 33 is attached to the lower surface of the support base 27 to support the entire excavator 34 so as to be able to swing freely within a horizontal plane.

In the above configuration, for example, if the soil quality of the excavated ground is suitable for the first excavation bit 8, the rotary drive device 10 is operated with the second excavation head 6 retracted, as shown in FIG. If the soil quality of the excavated ground changes and becomes suitable for the second excavation bit 9, the second excavation head 6 is moved forward and the second excavation bit 9 is placed in front of the first excavation bit 4. Once positioned, drilling bits suitable for the soil quality of each excavated ground can be used to efficiently excavate. In addition, if the ground changes from soft rock to hard rock during the process, the rotation of the first or second excavation heads 4 and 6 may be temporarily stopped, or
Or, while rotating, the second cylinder device 22
By moving the rock drill 20 forward and causing the chisel 20a to protrude from the front surface of the first excavation head 4, hard rock can also be excavated by the chisel 20a. In FIG. 2, arrow C indicates the direction of rotation of the excavation heads 4, 6.

By the way, as shown in FIG. 4, when the excavator 34 excavates the horizontal hole 35,
As shown in FIG. You may also do so.

According to the above configuration, since the first excavation head and the second excavation head can be used separately, by attaching different excavation bits to each excavation head, it is possible to immediately deal with changes in the soil quality of the excavated ground. In addition, if the soil is hard rock that cannot be excavated even with a drilling bit, it can be excavated with a chisel of a rock drill, and there is no need to replace the conventional excavation head or excavator, making it economical. The excavation efficiency is not reduced.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, in which FIG. 1 is an overall vertical sectional view, FIG. 2 is a view taken in the direction of the - arrow in FIG. 5 and 5 are diagrams showing examples of mounting an excavator on other equipment. 1... Hollow rotating shaft, 2... Annular support, 3...
First bearing, 4...First excavation head, 6...Second excavation head, 8...First excavation bit, 9...Second excavation bit, 10...Rotary drive device, 13...Cylinder body, 14 ...Third bearing, 16...First cylinder device, 20...Rock drill, 20a...Chisel, 21
...Second bearing, 22...Second cylinder device, 2
8...Third cylinder device, 34...Excavator.

Claims (1)

[Scope of utility model registration request] One end of the hollow rotary shaft is supported at one end of the annular support via a first bearing, and a first excavation head is attached to the other end of the hollow rotary shaft, and a second excavation head is attached to the first excavation head. A rotary drive device for rotating the hollow rotating shaft is provided on the annular support, and the rock drill is inserted into the hollow rotating shaft through a second bearing. A cylinder device is supported movably in the axial direction, and a cylinder device is interposed between the other end of the annular support and the rock drill, and the cylinder device is expanded and contracted to form a first excavation head in the center. An excavator characterized in that a chisel of a rock drill is moved outward from a through hole.