KR101394863B1 - A grab link device for fastening the bucket - Google Patents

Abstract

The present invention relates to a tongs link device for fastening a bucket, and more particularly, to a tongs link device for fastening a bucket which includes tongs for grasping a work piece, of which upper end is connected to a quick coupler of an excavator and of which lower end is formed to connect a bucket so as to grasp the work piece by a rotating action of the tongs and the bucket. The tongs link device for fastening the bucket which is connected to a quick coupler located at the lower end of a boom of an excavator comprises: an upper housing having a first connection rod and a second connection rod to be connected to the quick coupler; tongs hinge-connected to an end of the upper housing and rotated to grasp a work piece; a tongs hydraulic cylinder which is disposed inside the upper housing and of which one end is connected to the inside of the upper housing and of which the other end is connected to a rod connection hole of the tongs; a lower housing which is located at the lower end of the upper housing and which includes a first connection part and a second connection part for connecting an attachment; a hook disposed inside the lower housing in order to restrict an attachment connection rod inserted into the first connection part or the second connection part; and a hook hydraulic cylinder disposed inside the lower housing to rotate the hook.

Description

Description of the Related Art [0002] A grab link device for fastening the bucket,

The present invention relates to a clamping device for clamping a bucket, wherein the clamping device comprises a clamp capable of gripping a workpiece, the top being connected to the quick coupler of the excavator and the bottom clamping the bucket, To a bucket clamping clamping device capable of gripping a workpiece by a turning operation of the buckling clamping device.

Generally, an excavator is a heavy equipment used for crushing a strong ground such as rock by attaching a bucket, digging the ground or attaching a breaker, etc., and the attachment is selectively exchanged depending on the working conditions and circumstances as needed have.

The bucket can be easily mounted on a conventional excavator in order to secure safety of movement by quickly receiving the workpiece and moving it while stably supporting the workpiece and minimizing the volume of the bucket in the normal state, Hydraulic operating structure can be provided with auxiliary grippers that are easy to operate and use.

Conventionally, an excavator having such a clamping device is known from Korean Utility Model Registration No. 0171738, and FIG. 1 shows an excavator having such a clamping device according to the prior art. As shown in Fig. 1, the tongue 10 is joined to the lower end of the boom of the excavator and gradually broadens downward. The hydraulic cylinder 20 is coupled to the upper end of the boom of the excavator, (21). Thus, the operation of the tongue 10 is enabled by operating the hydraulic cylinder 20 connected to the hydraulic line 21 through the control of the hydraulic controller 22 mounted on the excavator.

However, in this case, in order to grasp the work using the bucket 40 coupled to the boom frame, the grippers 10 and the hydraulic cylinders 20 must be coupled to the boom frame, The tongue 10 and the hydraulic cylinder 20 must be continuously connected to the boom, so that the working load of the boom boom is increased, and smooth operation efficiency is not exhibited.

In order to solve the problems of the conventional art as described above, in the work for grasping a workpiece together with a bucket, a clamp link device including a clamp is coupled to a quick coupler coupled to a lower end of a boom frame of an excavator, The link mechanism is connected to the lower end of the link device to perform the operation, and if not, the quick coupler is used to remove the link device.

Further, according to the present invention, the grippers and gripper hydraulic cylinders for holding the workpiece together with the bucket are not joined to the boom frame by welding or the like, but are provided in separate gripper link devices, So that the buckets and the like can be fastened.

It is another object of the present invention to combine a breaker, a crusher, a ripper, or a foot rest in addition to a bucket in performing a work using a forceps.

It is a further object of the present invention to provide a hydraulic rotary motor on top of a clamping device for causing the clamping device coupled to the quick coupler of the excavator to rotate 360 degrees.

Further, the present invention has a hydraulic cylinder for rotating the clamp on the inside of the upper portion of the clamping link, thereby further increasing the turning angle of the clamp.

The above object of the present invention is also achieved by a clamping device coupled to a quick coupler located at a lower end of an excavator boom, comprising: an upper housing having a first coupling rod and a second coupling rod for coupling to the quick coupler; A clamping hydraulic cylinder provided inside the upper housing and having one end coupled to the inside of the upper housing and the other end coupled to the rod coupling hole of the clamp, A lower housing located at a lower end of the upper housing and including a first fastening portion and a second fastening portion for fastening the attachment, and a second fastening portion provided on the inner side of the lower housing for insertion into one of the first fastening portion and the second fastening portion, And a hook provided on the inside of the lower housing to pivot the hook Including hook hydraulic cylinder is achieved by a bucket for tightening tongs linkage made for.

In order to solve the problems of the conventional art as described above, in the work for grasping a workpiece together with a bucket, a clamp link device including a clamp is coupled to a quick coupler coupled to a lower end of a boom frame of an excavator, The link coupler is coupled to the lower end of the link device. Otherwise, the quick coupler can be used to remove the link link device, so that the clamp link device can be easily replaced according to the type of excavator work.

Further, according to the present invention, when the excavator joins a separate clamping device to the quick coupler located at the lower end of the excavator boom, it is possible to remove the clamping device when the excavator does not use the clamping device, There is another effect that it is not necessary to join the tongs and the tongue hydraulic cylinder to the boom band using welding or the like.

In addition, the present invention can be used in combination with a bucket, a breaker, a crusher, a ripper, or a footrest in addition to buckets to perform an operation of using a pincer. Thus, the excavator can be more effectively worked.

In addition, since the hydraulic linkage device of the present invention is provided with the hydraulic rotary motor on the upper part of the clamping device, the clamping device coupled to the quick coupler of the excavator can be rotated by 360 °, and the workpiece gripped by the clamping device can be easily There are other effects.

Further, the present invention provides a hydraulic cylinder for pivoting the clamp on the inside of the upper portion of the clamping link, thereby further increasing the pivot angle of the clamp, thereby further widening the movement radius of the work.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic view showing an excavator having a grip device according to the prior art; Fig.
Figure 2 is an exploded side view of a forceps link device according to one embodiment of the present invention,
3 is a detailed view of a forceps link device according to an embodiment of the present invention,
4 is a configuration diagram illustrating a tongue opening according to an embodiment of the present invention;
Figure 5 is a schematic diagram illustrating a closure of an implement according to an embodiment of the present invention;
FIG. 6 is an exploded side view of a clamping device according to another embodiment of the present invention; FIG.
7 is a detailed view of a clamping device according to another embodiment of the present invention.

The terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary terms and the inventor may appropriately define the concept of the term in order to best describe its invention It should be construed as meaning and concept consistent with the technical idea of the present invention.

Therefore, the embodiments described in this specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention and do not represent all the technical ideas of the present invention. Therefore, It is to be understood that equivalents and modifications are possible.

Hereinafter, preferred embodiments of the present invention will be described in detail.

FIG. 2 is an exploded side view of a clamping device according to an embodiment of the present invention, FIG. 3 is a detailed view of a clamping device according to an embodiment of the present invention, and FIG. And FIG. 5 is a block diagram illustrating a clip closure according to an embodiment of the present invention. As shown in FIGS. 2 to 5, a quick coupler 100 for mounting an attachment is provided at a lower end of a boom frame provided in an excavator.

The quick coupler 100 includes a quick coupler first fastening part 130 and a quick coupler second fastening part 140 for inserting the first coupling rod 211 and the second coupling rod 212 of the clamping device 200 A quick coupler hook 120 for fastening the first coupling rod 211 is provided on the side of the quick coupler first fastening part 130 on the inner side of the quick coupler 100 so as to be connected to the quick coupler hydraulic cylinder 110 Respectively.

The first coupling rod 211 and the second coupling rod 212 of the clamping device 200 are inserted into the quick coupler first coupling portion 130 and the quick coupler second coupling portion 140, The first coupling rod inserted into the first coupling part 130 can be securely fastened by the quick coupler hook 120 which is rotated by the operation of the quick coupler hydraulic cylinder 110. [

The upper and lower housings 210 and 220 are coupled to each other. The upper and lower housings 210 and 210 are open at the top, left, and right sides, respectively. And the lower housing 220 is opened in the bottom, left and right sides, and is symmetrical in the front and back sides.

The bottom surface of the upper housing 210 and the upper surface of the lower housing 220 are in contact with each other and are coupled to each other using a welding or fastening member. The upper housing 210 and the lower housing 220 Or may be integrally formed.

A first coupling rod 211 and a second coupling rod 212 coupled to the front surface and the rear surface of the upper housing 210 are formed parallel to each other with a predetermined distance therebetween. The second coupling rod 212 may be inserted into the quick coupler first coupling part 130 and the quick coupler second coupling part 140, respectively, of the quick coupler 100.

The front and rear surfaces of the upper housing 210 are protruded such that one side of the lower right end of the upper housing 210 is lower than the bottom surface of the upper housing 210 and the jaws 230 are hinge- The clamp 230 is hinged to the clamping member 215 to grip the workpiece.

The tongue 230 has an elongated 'S' shape. The tongue rod coupling hole 231 formed at one end of the tongue 230 is hinged to the upper housing 210, The jaw driving engagement member 216 formed on the rod of the hydraulic cylinder 213 is hinged. In addition, it is preferable that one or more protrusions are formed on the forceps 230 for firmly grasping the workpiece.

A clamping hydraulic cylinder 213 for providing a power for rotating the clamp 230 is fixed to the lower end of the first coupling rod 211 inside the upper housing 210 by a clamp hydraulic cylinder coupling which connects the front face and the back face of the upper housing The jaw driving coupling member 216 formed on the rod of the clamping hydraulic cylinder 213 is hinged to the rod coupling hole 231 formed at one end of the clamping member 213 and coupled to the clamping hydraulic cylinder 213, The tongue 230 can be rotated in response to the movement of the tongue 230.

The link 230 is hinged to the clamping member 215 of the upper housing 210 at a position spaced apart from the rod coupling hole 231 of the clamp 230, 232 are formed. It is preferable that one side where the rod coupling hole 231 of the tongs 230 is formed is bent at a predetermined angle with the other side and the link coupling hole 232 is formed at the center of one side and the other side of the tongue 230.

The hydraulic pressure supplied to the rod hydraulic cylinder 213 can be supplied from an excavator and can be supplied with hydraulic pressure using a hydraulic hose provided on the boom stand 150 of the excavator or a separately provided hydraulic hose.

The lower housing 220 can engage with the attachment 300 such as a bucket and the first attachment coupling rod 310 and the second attachment coupling rod 320 provided on the upper portion of the attachment 300, The first fastening portion 225 and the second fastening portion 226 are formed.

The second attachment coupling rod 320 is inserted into the second coupling portion 226 of the lower housing 220 and the first attachment coupling rod 310 is inserted into the first coupling portion 225. At this time, the lower housing 310 is provided with a hook 221 for fastening the first attachment coupling rod 310 inserted into the first coupling part 225.

The hook 221 is hinged to a hook pivoting member 223 that connects the front surface and the rear surface of the lower housing 220. One side of the hook 221 is connected to the first attachment coupling rod 223 inserted into the first coupling part 225, And the other side of the hook 221 is hinged to the rod of the hook hydraulic cylinder 222 for rotating the hook 221. [

The hook hydraulic cylinder 222 is hinged to a hook hydraulic cylinder fastening member 224 that connects between the front and back sides of the lower housing 220 to supply power to rotate the hook 221 and the hook hydraulic cylinder 222 Is coupled to the other side of the hook 221 so that the hook 221 is rotated according to the movement of the rod to bind the first attachment coupling rod 310 inserted into the first coupling part 225.

When the rod of the hook hydraulic cylinder 220 protrudes from the hook hydraulic cylinder 220, the hook 221 coupled to the rod of the hook hydraulic cylinder 220 rotates counterclockwise, The first attachment rod 310 of the attachment inserted into the first attachment part 225 can be bound.

The hydraulic pressure of the hook hydraulic cylinder 222 can be supplied from the excavator and the hydraulic pressure can be supplied using the hydraulic hose provided in the boom stand 150 of the excavator or a separately provided hydraulic hose.

The lower housing 220 is formed with a first coupling part 225 and a second coupling part 226 for inserting the attachment first coupling rod 310 and the attachment second coupling rod 320, The attachment portion 226 is formed in a recessed shape having a predetermined depth to securely insert the attachment second attachment rod 320. The first attachment portion 225 is formed in such a manner that the attachment first attachment rod 310 is easily inserted And is formed in an open depression form. When the attachment first coupling rod 310 is inserted into the first coupling part 225 to complement the opened shape of the first coupling part 225, the attachment first coupling rod is coupled to the first coupling part 310 using the hook 221 Let them be bound to wealth.

On the other hand, a safety pin hole 227 is formed on the front surface and the back surface of the lower housing 220. 4, when the hook 221 is pivoted to lock the first attachment coupling rod 310 inserted into the first coupling part 225, the safety pin (not shown) So as to be inserted in the opposite direction. When the hook 221 is pivoted to lock the first attachment coupling rod 310 inserted into the first coupling part 225, the safety pin hole 227 is formed in a state in which the safety pin hole 227 protrudes from the back surface of the hook 221, And a safety pin is inserted into the safety pin hole 227 so that the hook 221 is separated from the first coupling part 225 by a malfunction of the hook hydraulic cylinder 222. [ Can be prevented.

The clamping device 200 can rotate the clamping device 200 coupled to the quick coupler 100 by 360 ° when the upper housing 210 is provided with a hydraulic rotary motor (not shown) It is possible to easily perform the operation of gripping the work using the attachment 300 and the tongue 230 coupled to the lower end of the work 200.

FIG. 6 is an exploded side view of a kink link apparatus according to another embodiment of the present invention, and FIG. 7 is a detailed view of a kink link apparatus according to another embodiment of the present invention. 6 to 7, the hook 221 provided inside the lower housing 220 is hinged to the hook pivoting member 223 so that the end of the hook 221 is hinged to the hook pivoting member 223, .

The other side of the hook 221 is connected to the hook of the hook hydraulic cylinder 222 for transmitting the power to the hook 221 to rotate the hook 221, So that when the rod of the hook hydraulic cylinder 222 is projected, the hook 221 is rotated in the clockwise direction to constrain the attachment first coupling rod 310 inserted into the first coupling part 225 .

Meanwhile, it is preferable that the safety pin latching portion 228 according to another embodiment is configured to be opposite to the hook 221 shown in the first embodiment because the pivotal direction is opposite to that of the hook 221.

Other components in the other embodiments are the same as those described in Figs. 2-5.

The hook 221 described in the embodiment different from the embodiment of the present invention may be used to attach the attachment first rod 310 inserted into the first fastening part 225 to the first fastening part 220 of the lower housing 220, But may be positioned at the upper end of the second fastening portion 226 to fasten the attachment second rod 320 inserted into the second fastening portion 226.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be taken by way of limitation, Various changes and modifications will be possible.

10: forceps 20: hydraulic cylinder
21: Hydraulic line 22: Hydraulic controller
40: Bucket 100: Quick coupler
110: Quick coupler hydraulic cylinder 120: Quick coupler hook
130: quick coupler first fastening part 140: quick coupler second fastening part
150: boom 200: forceps
210: upper housing 211: first coupling rod
212: second coupling rod 213: tongue hydraulic cylinder
214: hydraulic cylinder fastening member 215:
216: Tongue drive engaging member 220: Lower housing
221: Hook 222: Hook hydraulic cylinder
223: a hook rotating member 224: a hook hydraulic cylinder engaging member
225: first fastening part 226: second fastening part
227: Safety pin hole 228: Safety pin engagement part
230: tongs 231: rod coupling hole
232: Link coupling hole 300: Attachment (bucket)
310: Attachment first coupling rod 320: Attachment second coupling rod

Claims (9)

CLAIMS 1. A clamping device coupled to a quick coupler located at a lower end of an excavator boom frame,
An upper housing having a first coupling rod and a second coupling rod for coupling to the quick coupler;
A pivotable hinge coupled to one end of the upper housing to grip the workpiece;
A clamping hydraulic cylinder provided inside the upper housing and having one end coupled to the inside of the upper housing and the other end coupled to the rod coupling hole of the clamp;
A lower housing located at a lower end of the upper housing and including a first fastening part and a second fastening part for fastening the attachment;
A hook provided on the inner side of the lower housing for holding the attachment coupling rod inserted into any one of the first coupling portion and the second coupling portion; And
A hook hydraulic cylinder provided inside the lower housing for rotating the hook,
Wherein the first coupling rod and the second coupling rod are parallel to a front surface and an upper surface of a rear surface of the upper housing, respectively, and are fastened to the first coupling portion and the second coupling portion of the quick coupler, respectively Wherein the clamp is hinged to a clamping member connecting the front and back sides of the upper housing.
The method according to claim 1,
Wherein the upper housing is open on a top surface, a left side and a right side, the front side and the rear side are symmetrical, and the bottom housing has a bottom, a left side and a right side opened, and a front side and a back side are symmetrical.
delete 3. The method of claim 2,
Wherein the upper housing and the lower housing are coupled to each other using a welding or fastening member, the bottom surface of the upper housing and the upper surface of the lower housing being coupled to each other.
The method according to claim 1,
Wherein the clamping hydraulic cylinder is hinged to a clamping hydraulic cylinder fastening member connecting the front and back of the upper housing.
delete The method according to claim 1,
And the clamping member is positioned lower than the height of the bottom surface of the upper housing.
The method according to claim 1,
Wherein a safety pin hole for inserting a safety pin is formed on a front surface and a rear surface of the lower housing when the hook is pivoted to the first coupling portion or the second coupling portion.
9. The method of claim 8,
Wherein a safety pin is formed on a rear surface of the hook to secure the safety pin in the safety pin hole to prevent a reverse rotation of the hook.

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