KR20110021425A - Ston grab - Google Patents

Abstract

PURPOSE: A stone grab is provided to freely grip bedrocks, draw up a large amount of soil or sand, and rotate a pair of tongs at a fixed angle using a single hydraulic cylinder. CONSTITUTION: A stone grab comprises a mount, a rotating unit, a mounting frame, a first tong(4), a second tong(8), a hydraulic cylinder(12), and an interlocking link. The mount is installed on the boom of the excavator. The rotating unit is installed in the mount to be rotatable and is connected to the controller. The installation frame is installed in the rotating unit and is rotated with the rotating unit. The first tong and the second tong are installed in the mounting frame. The hydraulic cylinder is comprised of a cylinder body(13) and a cylinder rod(14). One end of the cylinder body is coupled with a first power transmission rib(6) of the first tong. One end of the cylinder rod is coupled with a second power transmission rib(10) of the second tong. The interlocking link is comprised of a first link and a second link. One end of the first link is coupled with the first tong. One end of the second link is coupled with the other end of the first link, and the other end of the second link is coupled with the second power transmission rib of the second tong.

Description

Stone grab {Ston grab}

The present invention relates to a stone grab.

As is well known, stone grab is a device for easily carrying heavy rock, which is difficult to carry by manpower, and is usefully used for landscaping and masonry work.

The stone grab is a mount installed on the boom of an excavator, a mounting frame installed on the mount, a pair of forceps installed on the mounting frame to grip the rock, and a hydraulic cylinder connected to the mounting frame and the forceps to operate the forceps. Is done.

This conventional stone grab has the following problems.

First, hydraulic cylinders are installed for each pair of tongs to operate a pair of tongs. Therefore, since the hydraulic cylinder is installed for each of the tongs, the number of hydraulic cylinders installed in the stone grab increases by that amount, and accordingly, the manufacturing cost increases as the number of expensive parts increases.

Second, landscaping and masonry work often requires soil to be poured between stacked rocks. However, such a conventional stone grab is only a structure that is easy to grasp the rock in the structure of the forceps, and is not suitable for containing soil or sand. Therefore, even if the soil is collected with a stone grab, only a small amount is contained therein, most of which flows to both sides of the tongs, so that the soil cannot be pumped properly.

Third, the pair of tongs are rotated in a direction corresponding to each other to interlock or open each other. Thus, the ends of the pair of tongs are rotated and moved by the same angle by the hydraulic cylinders, while the rock is irregular in shape. Therefore, it is often the case that the rock is supported by two points on the tongs depending on the shape of the rock and the gripping position of the tongs. That is, one grip of one side of the rock is supported by one forceps, and the other side of the rock is supported by one force of the other tongs. As such, when the rock is transported in a state in which the rock is unstablely held, the rock is shaken by the rock weight of the rock and the excavator, and often falls out from the tongs, thereby causing a safety accident.

Fourth, the conventional stone grab is limited to a pair of tongs is not variable width, and thus the size of the rock to be lifted is also limited. The conventional stone grab has a limitation in lifting rock of various sizes.

SUMMARY OF THE INVENTION An object of the present invention for solving the above problems is to provide a stone grab that allows a pair of tongs to be rotated at the same angle with one hydraulic cylinder.

Another object of the present invention is to provide a stone grab that can freely grab a rock, and also can spread a large amount of soil or sand.

It is still another object of the present invention to provide a stone grab capable of varying the width of a pair of tongs.

It is still another object of the present invention to provide a stone grab in which at least four parts are gripped even in an irregular rock.

Stone grab of the present invention for achieving the above object, the mount is installed on the boom of the excavator; A rotating part installed to rotate on the mount and connected to the controller of the excavator and controlled by the excavator; An installation frame installed on the rotating part and rotating together with it; A first pivotal center rib is formed at one end of the installation frame to be coupled to the first hinge pin, and external power is transmitted to an adjacent portion of the first pivotal center rib to pivot about the first hinge pin. A first forceps in which power transmission ribs are formed; A second pivot center rib is formed at one end to be coupled to a second hinge pin at the other corner of the installation frame, and external power is transmitted to an adjacent portion of the second pivot center rib so that it is pivoted about the second hinge pin. A second forceps having two power transmission ribs; One end of the cylinder body is coupled to the first power transfer rib of the first tong by a first coupling pin, one end of the cylinder rod is coupled to the second power transfer rib of the second tong by a hydraulic cylinder ; A first link, one end of which is coupled to the first clip by a first link pin, and one end of which is coupled to the other end of the first link by a second link pin, and the other end of which is coupled to a second power transfer rib of the second tong. Comprising a second link coupled to the pin, when the cylinder rod of the hydraulic cylinder is folded or unfolded when the forward and backward linking the first and second tongs around the first hinge pin and the second hinge pin; Characterized in that consisting of.

Another feature of the stone grab of the present invention is that both sides of the first and second tongs, the first and second tongs to pick up the soil or sand, such as dirt and sand picked up the first and second tongs The first tongs side and the second tongs side shielding to prevent the flow down to both sides, and to fold the rock with the first and second tongs to the inside of the first and second tongs while pressing the house by the appearance of the rock Is provided.

Another feature of the stone grab of the present invention, the first clip side cover portion and the second clip side cover portion, the first fixing part and the second fixing part fixed to both sides of the first and second tongs, and one side The first bellows part and the second fixed part which are fixed to the first fixing part and the second fixing part and which are arranged to be in close contact with each other and cover both sides of the first and second tongs and to be folded or unfolded to the first and second tongs sides. The bellows part and the first bellows part and the second bellows part are respectively provided on the other side, and the first magnet and the second magnet are attached to each other when retracting the first and second magnets.

Stone grab of the present invention for achieving the same object described above, the mount is installed on the boom of the excavator; A rotating part installed to rotate on the mount and connected to the controller of the excavator and controlled by the excavator; An installation frame installed in the rotating part and rotating together with the first and second grooves formed at both bottom edges thereof; A first link having one end coupled to a first hinge pin in a first chapter groove of the installation frame, a second link having one end coupled to a second hinge pin in a second chapter groove of the installation frame, and a first link and a second link. Interlocking link consisting of a coupling pin coupled to the intersection of the link; One end of the cylinder body is coupled to the first hinge pin, the end of the cylinder rod is coupled to the second hinge pin, and the hydraulic cylinder to expand or fold the first link and the second link around the coupling pin during operation of the cylinder rod; A first tong fixed to an end of the second link to rotate about the coupling pin; A second tong is fixed to the end of the first link is rotated around the coupling pin; characterized in that consisting of.

Stone grab of the present invention for achieving the same object described above, the mount is installed on the boom of the excavator; A rotating part installed to rotate on the mount and connected to the controller of the excavator and controlled by the excavator; A guide which is fixed to the rotating part and rotates with it; A first installation frame fixed to one side of the guide; A second installation frame installed to slide along the other side of the guide; A first tong having one end coupled to a first hinge pin at one corner of the first installation frame; A first hydraulic cylinder having one side coupled to the first installation frame and the other end coupled to the first tongs to rotate the first tongs about the first hinge pin; A second tong having one end coupled to a second hinge pin at one corner of the second installation frame; A second hydraulic cylinder having one side coupled to the second installation frame and the other end coupled to the second tong to rotate the second tong about the second hinge pin; Both ends are installed in the first installation frame and the second installation frame, the interval adjusting cylinder for sliding the second installation frame along the guide; characterized in that consisting of.

Stone grab of the present invention for achieving the same object described above, the mount is installed on the boom of the excavator; A rotating part installed to rotate on the mount and connected to the controller of the excavator and controlled by the excavator; An installation frame installed on the rotating part and rotating together with it; A first pivotal center rib is formed at one end of the installation frame to be coupled to the first hinge pin, and external power is transmitted to an adjacent portion of the first pivotal center rib to pivot about the first hinge pin. A first forceps in which power transmission ribs are formed; A second pivot center rib is formed at one side of the first tongs and coupled to the first hinge pin at one corner of the mounting frame at one end thereof, and external power is transmitted to an adjacent portion of the second pivot center rib to transmit the first force. A second forceps having a second power transfer rib formed to rotate about the hinge pin; It is installed so as to face the first tongs, and a third pivot center rib is formed at one end to be coupled to the second hinge pin at the other edge of the installation frame, and external power is transmitted to an adjacent portion of the third pivot center rib so that the second power is transmitted. A third forceps having a third power transfer rib formed to rotate about the hinge pin; It is installed on one side of the third tongs and facing the second tongs, and a fourth pivotal center rib is formed at the other corner of the installation frame at one end so as to be coupled to the second hinge pin, and adjacent to the fourth pivotal center rib. A fourth forceps having a fourth power transfer rib formed so that external power is transmitted and rotated about the second hinge pin; Both ends are coupled to the first power transfer rib of the first tongs and the third power transfer rib of the third tongs, and the first and third tongs are unfolded or retracted about the first and second hinge pins. A first hydraulic cylinder to be carried; Both ends are coupled to the second power transfer rib of the second tongs and the fourth power transfer rib of the fourth tongs so that the second and fourth tongs are unfolded or pinched around the first hinge pin and the second hinge pin. A second hydraulic cylinder; characterized in that consisting of.

In the present invention as described above, the hydraulic cylinder is coupled to the first power transfer rib of the first tongs and the second power transfer rib of the second tongs, the interlocking link consisting of the first link and the second link is the first tongs And second tongs. Therefore, when one hydraulic cylinder is operated, the first and second tongs are simultaneously rotated in the corresponding direction by the interlocking link, and are engaged or unfolded with each other. Therefore, it is not necessary to install a hydraulic cylinder for each pair of tongs to operate a pair of tongs, thereby reducing the number of hydraulic cylinders installed in the stone grab, and the manufacturing cost is greatly reduced as the number of expensive parts is reduced.

Both sides of the first forceps and the second forceps are provided with a first forceps side shield and a second forceps side shield. Therefore, when picking up soil or sand with the first and second tongs, the house is prevented from flowing down to both sides of the first and second tongs. In addition, when the rock is picked up by the first and second tongs, the first bellows and the second bellows are folded by the outer shape of the rock and folded inside the first and second tongs, so the rock is first and second tongs. Are reliably gripped on. When the gripped rock is placed down, the first tongs side shield and the second tongs side shield folded inwardly are restored by the restoring force of the first bellows portion and the second bellows portion, or are mutually restrained by the magnetic force of the first magnet and the second magnet. As it is restored as it is attached, the side-shielding role of the tongs is restored. The stone grab of the present invention is not only able to grasp the rock freely, but also suitable for spreading a large amount of soil.

The stone grab of the present invention is provided with a first mounting frame fixed to the guide and a second mounting frame to be transported along the guide, the first mounting frame and the second mounting frame to adjust the spacing between them to vary the interval therebetween Is installed, and the first and second tongs are installed on the first and second installation frames, respectively. Therefore, when the gap adjusting cylinder is operated, the distance between the first installation frame and the second installation frame is variable while the second installation frame is moved along the guide, and thus the distance between the first and second tongs is adjusted. Therefore, the distance between the first and second tongs can be properly adjusted according to the size of the rock to be gripped, so that a single stone grab can carry and hold rocks of various sizes.

The stone grab of the present invention is provided with a first forceps and a second forceps on one side and a third forceps and a fourth forceps on the other side. Since the first and third tongs are controlled by the first hydraulic cylinder, and the second and fourth tongs are controlled by the second hydraulic cylinder, at least each of the tongs is supported by four parts of the rock even when an irregular rock is held. do. Therefore, even the irregular rock is held in four or more parts of the stone grab, so the gripped state is very stable. Therefore, the rock is separated from the tongs even when the rock is shaken by the rock weight and rocking of the excavator when the rock is transported. Problem is avoided.

Specific features and advantages of the present invention will become more apparent from the following description taken in conjunction with the accompanying drawings.

Figure 1 is a schematic perspective view showing an embodiment of the present invention stone grab, Figure 2 is a schematic perspective view showing a state in which the mount, the rotating portion, the installation frame in Figure 1, Figure 3 is a front view of Figure 1, Figure 4 A front view showing a state where the first and second tongs are engaged.

Such a stone grab of the present invention, the mount (1), the rotating part (2), the installation frame (3), the first tongs (4), the second tongs (8), hydraulic cylinder 12, the linkage link 17 Is done.

The mount 1 is attached to the boom of an excavator.

The rotating part 2 is installed so as to be rotated to the mount 1, and is connected to and controlled by the controller of an excavator.

The installation frame 3 is attached to the rotating part 2 and rotates with it.

The first tongs 4 have a first pivot center rib 5 formed at one end thereof so as to be coupled to the first hinge pin 7 at one corner of the installation frame 3, and the first pivot center rib 5 The first power transfer rib 6 is formed so that the external power is transmitted to the adjacent portion of the) so as to rotate around the first hinge pin 7.

The second clamp 8 has a second pivot center rib 9 formed at one end thereof so as to be coupled to the second corner pin 11 of the mounting frame 3 by a second hinge pin 11, and a second pivot center rib 9 is provided. The second power transfer rib 10 is formed to be rotated around the second hinge pin 11 by the external power is transmitted to the adjacent portion of the).

In the hydraulic cylinder 12, one end of the cylinder body 13 is coupled to the first power transmission rib 6 of the first tongs 4 by a first coupling pin 15, and one end of the cylinder rod 14. A second coupling pin 16 is coupled to the second power transmission rib 10 of the second tongs 8.

A safety valve 22 is provided in this hydraulic cylinder 12. The safety valve 22 blocks the discharge of the hydraulic pressure inside the hydraulic cylinder 12 to the broken hydraulic hose when the hydraulic hose (not shown) connected to the hydraulic cylinder 12 is broken. Therefore, even if the hydraulic hose is broken in the state where the hydraulic cylinder 12 is operated and the first tongs 4 and the second tongs 8 hold the rock, the hydraulic pressure of the hydraulic cylinder 12 is not discharged to the outside. Therefore, the first tongs (4) and the second tongs (8) to maintain the state holding the rock as it is to prevent a safety accident.

The interlocking link 17 has a first link 18 having one end coupled to the first clip 4 with a first link pin 20, and one end having a second link pin at the other end of the first link 18. Combination of the second link (19) coupled to the second power transmission rib (10) of the second forceps (8) by the second coupling pin (16), the other end is composed of a hydraulic cylinder (12) The first and second tongs 4 and 8 are rotated about the first and second hinge pins 7 and 11 while being folded or unfolded when the cylinder rod 14 is forward and backward.

In the stone grab of the present invention having such a configuration, as shown in FIGS. 1 to 3, the hydraulic cylinder 12 is operated in a state where the first tongs 4 and the second tongs 8 are unfolded so that the cylinder rod 14 is operated. When is advanced, the first tongs 4 and the second tongs 8 are rotated in a corresponding inward direction with respect to the first and second hinge pins 7 and 11. Since the first link 4 and the second clip 8 are provided with an interlocking link 17 composed of the first link 18 and the second link 19, the cylinder rod 14 is provided with a second clip ( When the second power transfer rib 10 of 8) is pushed, the first tongs 4 and the second tongs 8 are operated simultaneously.

The stone grab of the present invention has the following advantages.

First, since the rotating part 2 is installed between the mount 1 and the mounting frame 3, the entirety of the first and fourth tongs 4 and 8 including the mounting frame 3 is centered around the mount 1. Is rotated. Therefore, the first tongs 4 and the second tongs 8 can be freely rotated while holding the rock, stone work and landscaping work is very convenient.

In addition, the hydraulic cylinder 12 is coupled to the first power transfer rib 6 of the first tongs 4 and the second power transfer rib 10 of the second tongs 8, and the first link 18 And a linkage link 17 formed of a second link 19 is connected to the first tongs 4 and the second tongs 8. Accordingly, when one hydraulic cylinder 12 is operated, the first and fourth tongs 4 and 8 are simultaneously rotated in the corresponding direction by the interlocking link 17 to be engaged or unfolded. Therefore, it is not necessary to install the hydraulic cylinder 12 for each of the tongs to operate a pair of tongs, thus reducing the number of hydraulic cylinders 12 to be installed in the stone grab, and manufacturing cost as the number of expensive parts is reduced Is greatly reduced.

The number of hydraulic cylinders 12 can vary depending on the type of stone grab. That is, one hydraulic cylinder 12 may be installed in the small model, and two hydraulic cylinders 12 may be installed in the medium model. When the number of installation of the hydraulic cylinder 12 is increased, the force for holding the rock increases by that much.

FIG. 5 is a schematic front view showing a state where the first tongs side shield 30 and the second tongs side shield 34 are installed on the stone grab, and FIG. 6 is a state where the stone grab of FIG. 5 grips the rock. Fig. 7 is a schematic perspective view of the forceps side cover part.

In the present invention, the first tongs side shielding portion 30 and the second tongs side shielding portion 34 are provided inside both sides of the first tongs 4 and the second tongs 8. The first tongs side shielding portion 30 and the second tongs side shielding portion 34, the first tongs (4) and the second tongs to pick up the soil or sand, etc. The first tongs (4) while preventing the flow down to both sides of the tongs (4) and the second tongs (8), while pressing the rock with the first tongs (4) and the second tongs (8) by the appearance of the rock And folded to the inside of the second tongs (8).

The first tongs side shielding portion 30 and the second tongs side shielding portion 34 are the first fixing portion 31 and the second fixing portion 35, the first bellows portion 32 and the second bellows portion. 36, the first magnet 33 and the second magnet 37.

The first fixing part 31 and the second fixing part 35 are fixed inside both sides of the first clamp 4 and the second clamp 8. In the first bellows portion 32 and the second bellows portion 36, one side is fixed to the first fixing portion 31 and the second fixing portion 35 and the other side is in close contact with each other so that the first tongs 4 and the first Covering both sides of the two tongs (8) is provided to be folded or unfolded toward the first tongs (4) and the second tongs (8). The first magnet 33 and the second magnet 37 are provided on the corresponding other sides of the first bellows portion 32 and the second bellows portion 36, respectively, so that the first tongs 4 and the second tongs 8 When sticking, they are attached to each other.

Since the stone grab of the present invention is provided with the first tongs side shielding portion 30 and the second tongs side shielding portion 34 on both sides of the first tongs 4 and the second tongs 8. When picking up soil or sand with the first tongs 4 and the second tongs 8, the house is prevented from flowing down to both sides of the first and second tongs 4 and 8 .

In addition, when the rock is picked up by the first tongs 4 and the second tongs 8, the first bellows portion 32 and the second bellows portion 36 are pressed by the outer shape of the rock and the first tongs 4 and the first Since the two tongs 8 are folded into the inside, the rock is stably gripped by the first tongs 4 and the second tongs 8.

When the gripped rock is put down, the first tongs side shield portion 30 and the second tongs side shield portion 34 folded inwardly are restored by the restoring force of the first bellows portion 32 and the second bellows portion 36. , And are restored while being attached to each other by the magnetic force of the first magnet 33 and the second magnet 37 is restored to the side of the forceps. The stone grab of the present invention is not only able to grasp the rock freely, but also suitable for spreading a large amount of soil.

8 and 9 are diagrammatic perspective views showing a state in which the first and second tongs 4 and 8 are operated by a pair of hydraulic cylinders according to another embodiment of the present invention. (4) and the second tongs (8) are provided with two first power transfer ribs 6 and second power transfer ribs 10, respectively, and differ only in that two hydraulic cylinders 12 are installed on them. And action and effect are the same as in Figs.

10 and 11 are schematic front views showing a stone grab with a simplified structure as another embodiment of the present invention. Such a stone grab is characterized in that its structure is simpler than that of FIGS.

The stone grab is mounted to the mount 40 installed on the boom of the excavator, the rotating portion 41 is installed so as to rotate on the mount 40 and connected to the controller of the excavator and controlled by the controller 41 and the rotating portion 41, Rotating together, there is provided an installation frame 42 in which the first long grooves 43 and the second long grooves 44 are formed in an arc shape at the lower both sides.

The installation frame 42 is provided with an interlocking link 45. The interlocking link 45 has a first link 46 having one end coupled to the first long groove 43 of the mounting frame 42 by a first hinge pin 49, and one end of the second linking frame 42. The second link 47 coupled to the long groove 44 by the second hinge pin 50 and the coupling pin 48 coupled to the intersection of the first link 46 and the second link 47. Is done.

The hydraulic cylinder 51 is installed in the interlock link 45. Hydraulic cylinder 51, one end of the cylinder body 53 is coupled to the first hinge pin 49, the end of the cylinder rod 52 is coupled to the second hinge pin 50, the cylinder rod 52 In the operation of the first link 46 and the second link 47 to expand or fold around the coupling pin (48).

The first tongs 54 pivoted about the coupling pins 48 are fixed to the end of the second link 47, and the pivots about the coupling pins 48 to the end of the first link 46. Two tongs 55 are fixed.

The stone grab of the present invention has a very simple structure. The stone grab of FIGS. 1 to 4 has a first pivot center rib 5, a second pivot center rib 9, and a first power transmission rib for coupling the first and fourth tongs 4 and 8. 6) and the second power transfer rib 10 is formed and the first hinge pin 7 and the second hinge pin 11 and the first coupling pin 15 and the second coupling pin 16, respectively, Must be combined.

On the other hand, in the stone grab of FIGS. 10 and 11, the first tongs 54 and the second tongs 55 are simply fixed to the first link 46 and the second link 47. Therefore, the connection structure of the interlocking link 45, the first tongs 54, the second tongs 55 is very simple, thus making the stone grab is so easy.

12 and 13 are still another embodiment of the present invention, a schematic front view showing a stone grab provided to vary the width of the first and second tongs, which is a mount 60 installed on the boom of the excavator ), A rotating part 61 installed to be rotated on the mount 60 and connected to the controller of the excavator and controlled by the excavator 60, and a guide 62 fixed to the rotating part 61 and rotated therewith.

The first installation frame 63 is fixed to one side of the guide 62. On the other side of the guide 62, a second installation frame 64 is installed to slide along it. One end of the first tongs 65 is coupled to one side edge portion of the first installation frame 63 by the first hinge pin 66.

One side of the first hydraulic cylinder 67 is coupled to the first installation frame 63, and the other end of the first hydraulic cylinder 67 is coupled to the first tongs 65 so that the first tongs 65 are connected to the first. Rotate around the hinge pin (66). One end of the second tongs 68 is coupled to one side edge portion of the second installation frame 64 by a second hinge pin 69.

One side of the second hydraulic cylinder 70 is coupled to the second installation frame 64 and the other end is coupled to the second tongs 68 to rotate the second tongs 68 about the second hinge pin 69. . Both ends of the space adjusting cylinder 71 are installed in the first installation frame 63 and the second installation frame 64 to slide the second installation frame 64 along the guide 62.

In the present invention, the stone grab has the following characteristics.

The stone grab of the present invention described above is provided with a first mounting frame 63 fixed to the guide 62 and a second mounting frame 64 conveyed along the guide 62, the first mounting frame 63. And a gap adjusting cylinder 71 is installed in the second installation frame 64 so as to vary the gap therebetween, and the first tongs 65 and the first installation frame 63 and the second installation frame 64. Second tongs 68 are respectively installed.

Therefore, when the gap adjustment cylinder 71 is operated, the distance between the first installation frame 63 and the second installation frame 64 is varied while the second installation frame 64 is moved along the guide 62. The gap between the first tongs 65 and the second tongs 68 is adjusted. Therefore, since the distance between the first tongs 65 and the second tongs 68 can be properly adjusted according to the size of the rock to be gripped, the rock of various sizes can be grasped and carried by one stone grab.

14 to 16 are still other embodiments of the present invention, which are schematic perspective views and front views showing a stone grab provided to engage at least four portions when gripping an irregular rock, which is a mount installed on a boom of an excavator ( 80, a rotating part 81 installed to rotate on the mount 80 and connected to the controller of the excavator and controlled by the excavator 80, and an installation frame 82 installed on the rotating part 81 and rotated therewith.

The first tongs 83, the second tongs 87, the third tongs 90, the fourth tong 93 is installed in the installation frame 82.

The first tongs 83, the first pivot center ribs 84 are formed at one end to be coupled to the first hinge pin 86 at one corner of the installation frame 82, the first pivot center rib 84 The first power transfer rib 85 is formed so that the external power is transmitted to the adjacent portion of the) so as to rotate around the first hinge pin 86.

The second tongs 87 are installed on one side of the first tongs 83 and the second pivot center rib 88 is coupled to one end of the mounting frame 82 by the first hinge pin 86 at one end thereof. The second power transfer rib 89 is formed so that external power is transmitted to an adjacent portion of the second pivot center rib 88 so as to rotate about the first hinge pin 86.

The third tongs 90 are installed so as to face the first tongs 83 and the third pivot center ribs 91 are coupled to the other edges of the installation frame 82 at one end by the second hinge pins 86. The third power transfer rib 92 is formed such that external power is transmitted to an adjacent portion of the third rotation center rib 91 so as to rotate about the second hinge pin 96.

The fourth tong 93 is installed on one side of the third tongs 90 to face the second tongs 87 and at one end to the second hinge pin 96 at the other corner of the installation frame 82. The fourth rotational center rib 94 is formed to be coupled, and the fourth power transmission rib is rotated around the second hinge pin 96 by transmitting external power to an adjacent portion of the fourth rotational center rib 94. 95 is formed.

These tongs are provided with a first hydraulic cylinder 97 and a second hydraulic cylinder 98. The first hydraulic cylinder 97 has both ends coupled to the first power transfer ribs 85 of the first tongs 83 and the third power transfer ribs 92 of the third tongs and to the first forceps ( 83) and the third tongs 90 to be unfolded or pinched around the first hinge pin 86 and the second hinge pin 96.

The second hydraulic cylinder 98 has both ends coupled to the second power transfer ribs 89 of the second tongs 87 and the fourth power transfer ribs 95 of the fourth tongs 93. 87) and the fourth tong 93 to be unfolded or pinched around the first hinge pin 86 and the second hinge pin 96.

This invention has the following features.

The first tongs 83 and the second tongs 87 are provided on one side of the stone grab, and the third and fourth tongs 90 and 93 are provided on the other side. Since the first and third tongs 83 and 90 are controlled by the first hydraulic cylinder 97 and the second and fourth tongs 87 and 93 are controlled by the second hydraulic cylinder 98, Even when gripping an irregular rock, at least each of the tongs is supported by four parts of the rock.

Therefore, even the irregular rock is held in four or more parts of the stone grab, so the gripped state is very stable. Therefore, the rock is separated from the tongs even when the rock is shaken by the rock weight and rocking of the excavator when the rock is transported. Problem is avoided.

1 is a schematic perspective view showing an embodiment of the present invention stone grab

Figure 2 is a schematic perspective view showing a state in which the mount, the rotating portion, the installation frame removed in Figure 1

3 is a front view of FIG. 1

4 is a front view showing a state in which the first and second tongs are engaged.

FIG. 5 is a schematic front view showing a state where the first and second tongs side shields are installed on the stone grab;

6 is a schematic front view showing a state in which the stone grab of FIG. 5 grips the rock;

Figure 7 is a schematic perspective view of the forceps side cover

8 and 9 are schematic perspective views showing a state in which the first and second tongs are operated by a pair of hydraulic cylinders according to another embodiment of the present invention.

10 and 11 are schematic front views showing a stone grab with a simplified structure as another embodiment of the present invention.

12 and 13 are still other embodiments of the present invention. Schematic front views showing a stone grab provided to vary the width of the first and second tongs.

14 to 16 are still another embodiment of the present invention, a schematic perspective view and front view showing a stone grab provided to engage more than four portions when gripping an irregular rock

* Description of the symbols for the main parts of the drawings *

1,40,60,80: Mount 2,41,61,81: Rotating part

3,42,82: Installation frame 4,54,65,83: First tongs

5,84: 1st rotation center rib 6,85: 1st power transmission rib

7,49,66,86: first hinge pin 8,55,68,87: second clamp

9,88: 2nd centering rib 10,89: 2nd power transmission rib

11,50,69,96: 2nd hinge pin 12,51: Hydraulic cylinder

13,53: cylinder body 14,52: cylinder rod

15: first binding pin 16: second binding pin

17,45: interlocking link 18,46: first link

19,47: second link 20: first link pin

21: second link pin 22: safety valve

30: first clip side shielding part 31: first fixing part

32: first bellows portion 33: the first magnet

34: second clip side shielding part 35: second fixing part

36: second bellows portion 37: the second magnet

43: Chapter 1 Groove 44: Chapter 2 Groove

48: coupling pin 62: guide

63: first installation frame 64: second installation frame

67,97: 1st hydraulic cylinder 70,98: 2nd hydraulic cylinder

71: space adjusting cylinder 90: third tongs

91: 3rd driving center rib 92: 3rd power transmission rib

93: fourth tong 94: fourth thrust center rib

95: fourth power transfer rib

Claims (6)

A mount (1) installed on the boom of the excavator; A rotating part 2 installed to be mounted to the mount 1 and connected to and controlled by the controller of the excavator; An installation frame (3) installed on the rotating unit (2) and rotating together with it; A first pivot center rib 5 is formed at one end to be coupled to the first hinge pin 7 at one corner of the installation frame 3, and external power is applied to an adjacent portion of the first pivot center rib 5. A first forceps 4 having a first power transfer rib 6 formed thereon to be transmitted to rotate about the first hinge pin 7; A second pivot center rib 9 is formed at one end to be coupled to the second hinge pin 11 at the other edge portion of the installation frame 3, and external power is applied to an adjacent portion of the second pivot center rib 9. A second forceps 8 having a second power transfer rib 10 formed thereon to be transmitted and rotated about the second hinge pin 11; One end of the cylinder body 13 is coupled to the first power transfer rib 6 of the first tongs 4 by the first coupling pin 15, and one end of the cylinder rod 14 to the second tongs 8. A hydraulic cylinder 12 coupled to the second power transfer rib 10 by a second coupling pin 16; A safety valve 22 installed in the hydraulic cylinder 12 to block discharge of the hydraulic pressure in the hydraulic cylinder 12 into the broken hydraulic hose when the hydraulic hose connected to the hydraulic cylinder 12 is broken; One end of the first link 18 is coupled to the first clip 4 to the first link pin 20, and one end is coupled to the other end of the first link 18 by the second link pin 21 The other end is composed of a second link (19) coupled to the second power transfer rib (10) of the second tongs (8) by a second coupling pin (16), so that the cylinder rod (14) of the hydraulic cylinder (12) When the back and forth when folded or unfolded interlocking link (17) for rotating the first tongs (4) and the second tongs (8) around the first hinge pin (7) and the second hinge pin (11); Stone grab characterized in that. The inside of both sides of the first tongs 4 and the second tongs 8, according to claim 1, When dirt or sand is picked up by the first tongs 4 and the second tongs 8, the soil or sand is prevented from flowing down to both sides of the first tongs 4 and the second tongs 8, and First tongs side shielding portion 30 to be folded into the first tongs (4) and the second tongs (8) while pressing the rock by the shape of the rock when the first tongs (4) and the second tongs (8) And a second tongs side shielding portion 34 is provided. The method of claim 1, wherein the first tongs side shielding portion 30 and the second tongs side shielding portion 34, The first fixing part 31 and the second fixing part 35 fixed inside both sides of the first tongs 4 and the second tongs 8, and one side is the first fixing part 31 and the second fixing part. Fixed to (35) and the other side is in close contact with each other to cover both sides of the first tongs (4) and the second tongs (8) and to be folded or unfolded toward the first and fourth tongs (4) and second tongs (8) side The first bellows portion 32 and the second bellows portion 36 and the first bellows portion 32 and the second bellows portion 36 are provided on the corresponding other sides, respectively, so that the first tongs 4 and the second tongs ( 8) Stone grab, characterized in that consisting of the first magnet 33 and the second magnet (37) attached to each other when pinching. Mount 40 is installed on the boom of the excavator; A rotating part 41 installed to be mounted to the mount 40 and connected to the controller of the excavator and controlled by the controller 40; An installation frame 42 installed at the rotary part 41 and rotating together with the first frame 43 and the second cabinet 44 having an arc shape at both bottom edges thereof; One end of the first link 46 coupled to the first long groove 43 of the mounting frame 42 by the first hinge pin 49, and one end of the second long groove 44 of the mounting frame 42 Interlock link 45 consisting of a second link 47 coupled to the two hinge pins 50, and a coupling pin 48 coupled to the intersection of the first link 46 and the second link 47. ; One end of the cylinder body 53 is coupled to the first hinge pin 49, the end of the cylinder rod 52 is coupled to the second hinge pin 50, the first link (in operation of the cylinder rod 52) 46 and a hydraulic cylinder 51 which expands or folds the second link 47 around the coupling pin 48; A first tongs 54 which are fixed to an end of the second link 47 and rotated about the coupling pin 48; The stone grab, characterized in that consisting of; second tongs (55) fixed to the end of the first link (46) is rotated around the coupling pin (48). Mount 60 is installed on the boom of the excavator; A rotating portion 61 installed to rotate on the mount 60 and connected to and controlled by the controller of the excavator; A guide 62 fixed to the rotary part 61 and rotated therewith; A first mounting frame 63 fixed to one side of the guide 62; A second mounting frame 64 installed to slide along the other side of the guide 62; A first tong 65 having one end coupled to a first hinge pin 66 at one corner of the first installation frame 63; A first hydraulic cylinder 67 having one side coupled to the first installation frame 63 and the other end coupled to the first tongs 65 to rotate the first tongs 65 about the first hinge pin 66; A second forceps 68 having one end coupled to a second hinge pin 69 at one corner of the second installation frame 64; A second hydraulic cylinder 70 having one side coupled to the second installation frame 64 and the other end coupled to the second tongs 68 to rotate the second tongs 68 about the second hinge pin 69; Both ends are installed in the first installation frame 63 and the second installation frame 64, the interval adjusting cylinder 71 for sliding the second installation frame 64 along the guide 62; Stone Grab. Mount 80 is installed on the boom of the excavator; A rotating part 81 installed to rotate on the mount 80 and connected to and controlled by the controller of the excavator; An installation frame 82 installed on the rotation unit 81 and rotated therewith; A first pivot center rib 84 is formed at one end of the installation frame 82 to be coupled to the first hinge pin 86 at an edge thereof, and an external power source is adjacent to the first pivot center rib 84. The first forceps 83 is formed so that the first power transmission ribs 85 are formed to be rotated about the first hinge pin 86. A second pivot center rib 88 is formed at one side of the first tongs 83 and is coupled to the first hinge pin 86 at one corner of the installation frame 82 at one end thereof, and has a second pivot center. A second forceps 87 having a second power transfer rib 89 formed so that external power is transmitted to an adjacent portion of the rib 88 and rotated about the first hinge pin 86; A third pivot center rib 91 is formed to face the first tongs 83 and to be coupled to a second hinge pin 96 at the other edge of the installation frame 82 at one end thereof, and to have a third pivot center. A third forceps 90 having a third power transfer rib 92 formed so that external power is transmitted to an adjacent portion of the rib 91 so as to rotate about the second hinge pin 96; The fourth pivot center rib is installed on one side of the third tongs 90 and installed to face the second tongs 87 and coupled to the other edge of the installation frame 82 at one end by the second hinge pin 96. 94 is formed, and the fourth power transfer rib 95 is formed so that external power is transmitted to an adjacent portion of the fourth pivot center rib 94 so that it rotates around the second hinge pin 96. Four tongs 93; Both ends are coupled to the first power transfer rib 85 of the first forceps 83 and the third power transfer rib 92 of the third forceps 90, and the first forceps 83 and the third forceps 90 A first hydraulic cylinder (97) to be extended or retracted about the first hinge pin (86) and the second hinge pin (96); Both ends are coupled to the second power transfer rib 89 of the second tongs 87 and the fourth power transfer rib 95 of the fourth tongs 93, and the second tongs 87 and the fourth tongs 93 The second hydraulic cylinder (98) to be expanded or retracted about the first hinge pin (86) and the second hinge pin (96); Stone Grab consisting of.

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