KR101668757B1 - Arm for excavator with rotating device - Google Patents

Arm for excavator with rotating device Download PDF

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Publication number
KR101668757B1
KR101668757B1 KR1020150099382A KR20150099382A KR101668757B1 KR 101668757 B1 KR101668757 B1 KR 101668757B1 KR 1020150099382 A KR1020150099382 A KR 1020150099382A KR 20150099382 A KR20150099382 A KR 20150099382A KR 101668757 B1 KR101668757 B1 KR 101668757B1
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South Korea
Prior art keywords
arm
case
wall
excavator
directions
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KR1020150099382A
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Korean (ko)
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정진호
조윤근
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정진호
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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/30—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets with a dipper-arm pivoted on a cantilever beam, i.e. boom
    • E02F3/304—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets with a dipper-arm pivoted on a cantilever beam, i.e. boom with the dipper-arm slidably mounted on the boom
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/36—Component parts
    • E02F3/3604—Devices to connect tools to arms, booms or the like
    • E02F3/3609—Devices to connect tools to arms, booms or the like of the quick acting type, e.g. controlled from the operator seat

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Operation Control Of Excavators (AREA)

Abstract

The present invention relates to an arm for an excavator with a rotating device. The present invention includes a rotating device installed and fixed between an upper arm and a lower arm, but rotating the lower arm in both directions up to less than 180 degrees while being used in a fixed state after rotation at a predetermined angle. Even if the separation and reinstallation of a bucket are not requested, an excavation direction is able to be easily changed to a forward excavation direction and an inverse excavation direction as well as an excavation direction inclined at a predetermined angle from the forward excavation direction or inverse excavation direction. Therefore, the present invention is capable of improving work efficiency by minimizing the fatigue of workers while significantly raising the efficiency of excavation work as the separation and reinstallation of the bucket are not requested.

Description

Technical Field [0001] The present invention relates to an arm for an excavator having a rotating device,

The present invention relates to an excavator arm having a rotary device, and more particularly to an excavator arm having a rotary device, and more particularly to an arm for an excavator having a lower arm which is rotatable in an angle of less than 180 degrees in both directions, It is possible to rotate the excavation direction from the direction of forward excavation work and the direction of backward excavation work as well as the direction of forward excavation work or the direction of reverse excavation work without the need to separate and reattach the bucket, The excavation work direction can be easily changed even in a slanting direction of a certain angle, so that the efficiency of the excavation work is remarkably increased and the fatigue of the worker is minimized by improving the work efficiency The present invention relates to an excavator arm having a rotating device that can be rotated by a motor.

Generally, an excavator for a construction equipment includes a main body mounted on a driving means, a boom connected to an upper portion of the main body and operated by a boom cylinder, an arm connected to the boom and operated by an arm cylinder, And a bucket operated by a bucket cylinder.

That is, in the excavator constructed as described above, the boom performs an up-down movement in a vertical motion by the rotation of the boom connecting portion by the boom cylinder, and the arm is pulled forward by the rotation of the female connection by the arm cylinder, Crowd and dump exercise is to be pushed.

However, in the excavator according to the related art as described above, since the arm is operated only in the forward and backward direction by the boom cylinder at the end of the boom but can not be rotated, the excavation direction of the bucket is changed from the forward direction to the forward excavation operation (Hereinafter referred to as the reverse drilling operation direction) in which the excavation direction of the bucket is the forward side from the excavator side, the mounting direction of the bucket is changed from the direction of forward excavation work It is necessary to change the direction of the backward excavation work by 180 degrees. In other words, when the direction of the excavation work is changed, the bucket is required to be separated and re-installed.

In other words, since the conventional excavator arm is not capable of rotating the bucket relative to the excavation working direction, and thus the separation and reseat time of the bucket is required, the separation and reseat time of the bucket occurs when the excavation operation direction is changed, There is a problem in that the efficiency of the apparatus is deteriorated.

Furthermore, the conventional excavator arm as described above can not change the excavation direction of the bucket without detaching and reattaching the bucket once the bucket is once mounted, In the case where an excavation work such as a fan shape is required only in the reverse direction of excavation work direction, it is necessary to turn the excavator's turning tower or to start the excavator itself. Therefore, There is a problem that the efficiency of the apparatus is greatly reduced.

Therefore, it is possible to easily change the excavation direction even when the excavation direction is the forward direction and the reverse direction excavation direction as well as the inclination angle of the constant angle, without requiring separation and re-installation of the bucket, It is required to research and develop an arm for an excavator capable of selectively rotating the bucket without detaching and reattaching the bucket so as to increase the workability and minimize worker fatigue.

Korean Patent Laid-Open Publication No. 2014-21084 2014.02.20. Disclosure Korean Patent Publication No. 2010-74428 Published Jul. 2, 2010

In order to solve the above-mentioned problems, the present invention provides a method of mounting a lower arm to a lower arm, the lower arm being rotatable to an angle of less than 180 degrees in both directions, The drilling direction can be changed in a direction inclined at a predetermined angle from the forward drilling operation direction or the backward drilling operation direction as well as the forward direction excavation operation direction and the reverse direction excavation operation direction without requiring separation and re-installation of the bucket And it is an object of the present invention to provide an excavator arm having a rotating device for easily changing the excavation working direction.

In addition, the technique according to the present invention can also excavate the excavation direction in a direction inclined by a certain angle from the forward excavation operation direction, the forward excavation operation direction, or the backward excavation operation direction as well as the reverse direction excavation operation direction without requiring separation and re- It is an object of the present invention to improve efficiency of excavation work and minimize worker fatigue by improving the work efficiency since it is not required to separate and reinstall the bucket by easily changing the working direction.

The present invention for achieving the above-mentioned objects is as follows. That is, an arm for an excavator having a rotating device according to the present invention is connected to a boom of an excavator and is operated by an arm cylinder, a bucket for excavation is connected to a lower end through a quick coupler, Wherein the arm is divided into an upper arm and a lower arm such that the lower arm is selectively rotated between a lower arm and a lower arm by a predetermined angle in both directions, A rotary device capable of rotating to an angle of less than 180 degrees and selectively rotating in a predetermined angle in both directions is fixedly installed.

Here, the rotating device may include a lower mounting plate having a lower surface fixed to an upper end of the lower arm; A lower connecting ring having a lower end fixed to the upper surface of the lower mounting plate and extending upward by a predetermined length; And an inner wall and an outer wall are formed in a cylindrical shape and penetrate through a central fixed area. The upper and lower walls of the lower mounting ring are connected to each other, A lower case on which a movable plate, which is selectively rotated in both directions, is formed; An upper mounting plate having an upper surface fixed to a lower end of the upper arm; An upper connecting ring having an upper end fixed to a bottom surface of the upper mounting plate and extending a predetermined length downward and an upper end rotatably connected to a lower end portion of the lower connecting ring; And an outer side upper surface fixed to the inside of a bottom surface of the upper mounting ring of the upper mounting plate to which the upper end of the upper connecting ring is fixed and having an inner side wall which is in a cylindrical shape and penetrates the central certain area, An inner side wall and an outer side wall are formed on the inner side and the outer side of the diaphragm so that the inner side wall and the outer side wall are engaged with each other. On the other hand, the first hydraulic line and the second hydraulic line are connected to both sides of the diaphragm on the closed top with the bottom opened, and the hydraulic pressure supplied through the first hydraulic line or the second hydraulic line selectively And an upper case installed to cover the upper portion of the lower case so that the movable plate rotates in both directions.

Here, the lower case is selectively rotated in both directions on the basis of the upper case so that the lower arm can be rotated at a predetermined angle in both directions with respect to the upper arm, Wherein the lower connecting ring is rotatably connected to the lower portion of the connecting ring, wherein the upper connecting ring is formed with an inwardly bent hooking guide having a "U" shape, while the lower connecting ring has an inverted "U" And a connection guide formed to be outwardly bent and connected to the engaging guide so as to be rotatable.

The upper case is installed to cover the upper part of the lower case, and the lower case is mounted on the upper case so that the upper case and the lower case can be rotated without interference when the lower case is rotated And the upper end of the sealed case is formed to have a thickness larger than that of the closed lower end by opening the upper case.

The lower case and the upper case may be integrally formed with the lower case and the upper case so that the inner space of the lower case and the upper case are tightly sealed with the outside. It is preferable that a packing is further provided along the circumference of the partition where the coupling groove and the outer coupling groove are formed.

In addition, in order to close the inner space of the lower case and the upper case closely to the outside, in a state where the upper case is covered with the upper case, the one side of the inner side coupling groove and the one side of the inner side of the lower case And an O-ring is further provided at a predetermined interval in a longitudinal direction in which one surface of the outer coupling groove and the one surface of the outer wall of the lower case closely contact with each other.

The effect of the excavator arm having the rotating device according to the present invention will be described as follows.

First, the rotary arm is fixedly installed between the upper arm and the lower arm, and in particular, the lower arm is rotatable in an angle of less than 180 degrees in both directions and rotated at a predetermined angle, It is possible to easily change the excavation direction regardless of whether the excavation work direction is the forward excavation work direction or the reverse excavation work direction as well as the forward excavation work direction or the reverse direction excavation work direction without requiring separation and reinstallation of the bucket .

Second, the excavation direction can be easily changed even in the forward direction of the excavation work direction and the reverse direction excavation work direction as well as in the forward direction excavation work direction or in a direction inclined at a constant angle from the reverse direction excavation work direction without requiring separation and reinstallation of the bucket. So that the efficiency of excavation work can be remarkably increased and the fatigue of the worker can be minimized and the work efficiency can be improved.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a front structural view showing an arm for an excavator having a rotating device according to the present invention; Fig.
Fig. 2 is a perspective view showing a rotary device as a substantial part of an excavator arm having a rotary device according to the present invention. Fig.
3 is a longitudinal sectional view showing a rotary device which is a substantial part of an excavator arm having a rotary device according to the present invention.
4 is a cross-sectional view showing a rotating device which is a substantial part of an arm for an excavator having a rotating device according to the present invention.
Fig. 5 is a view showing an example of a use state showing a use state in which a rotary device, which is a substantial part of an arm for an excavator having a rotary device according to the present invention, rotates by hydraulic pressure.
FIGS. 6 and 7 are exploded views of a state where the lower arm of the excavator arm having the rotating device according to the present invention is selectively rotated.
Fig. 8 is a longitudinal sectional view showing another embodiment of a rotating device which is a substantial part of an arm for an excavator having a rotating device according to the present invention; Fig.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of an excavator arm having a rotating device according to the present invention will be described in detail with reference to the accompanying drawings.

Fig. 1 is a front structural view showing an arm for an excavator having a rotary device according to the present invention, Fig. 2 is a perspective view showing a rotary device which is a substantial part of an excavator arm having a rotary device according to the present invention, Is a longitudinal sectional view showing a rotating device which is a substantial part of an excavator arm having a rotating device according to the present invention.

Fig. 4 is a cross-sectional view showing a rotary device which is a substantial part of an arm for an excavator having a rotary device according to the present invention, Fig. 5 is a schematic view showing a rotary device according to the present invention, Fig. 8 is an example of a use state showing a use state of operation.

FIGS. 6 and 7 are a state diagram illustrating a state in which a lower arm of an excavator arm having a rotary device according to the present invention is selectively rotated.

1 to 7, an arm for an excavator having a rotary device according to a preferred embodiment of the present invention is connected to a boom 100 of an excavator and is operated by an arm cylinder 200, 400 is coupled to a quick coupler 450 and a bucket cylinder 410 for operating the bucket 400 is installed on the front side.

The excavator arm 300 having the rotating device according to the present invention is particularly divided into an upper arm 320 and a lower arm 310 and is disposed between the upper arm 320 and the lower arm 310, 310 are selectively rotated in both directions by a predetermined angle, wherein the lower arm 310 is selectively rotatable in both directions at an angle of less than 180 degrees in both directions, It is fixedly installed.

At this time, the excavator arm 300 having the above-described rotating device according to the present invention is configured such that the lower arm 310 is selectively rotated at a predetermined angle by the rotating device 500 on the basis of the upper arm 320 The upper end of the bucket cylinder 750 is connected to the upper side of the upper side of the lower arm 310 so that the upper end of the bucket cylinder 750 can be engaged with the link It is preferable that the connection bracket 430 is provided.

Particularly, in the arm for an excavator having the rotary device according to the present invention as described above, the rotary device 500, which is a concave part, includes a lower installation plate 510, a lower connection ring 520, a lower case 530, A plate 550, an upper connecting ring 560, and an upper case 570.

The lower connecting ring 520 is fixed to the upper surface of the lower mounting plate 510 so that the upper end of the lower connecting ring 520 is upwardly fixed The length is extended.

The lower case 530 has an outer lower surface fixedly installed inside the upper surface on which the lower end of the lower connecting ring 520 of the lower mounting plate 510 is fixed, And an outer wall 532 are formed.

In particular, the lower case 530 is formed with a movable plate 535, which is opened at one side and is selectively rotated in both directions between the inner wall 531 and the outer wall 532.

The upper connecting plate 560 is fixed to the lower surface of the upper mounting plate 550 and has a downward constant And the upper end portion is rotatably connected to the lower end portion of the lower connection ring 520. [

The upper case 570 has an outer upper surface fixedly installed inside the bottom surface of the upper mounting plate 550 on which the upper end of the upper connecting ring 560 is fixed, 531 and an outer wall 572 which is closely attached to surround the outer wall 532 are formed.

Particularly, the upper case 570 as described above is provided with a diaphragm 575 which is opened at the lower side and connects the inner side wall 571 and the outer side wall 572. Inside and outside of the diaphragm 575, The inner engaging groove 576 and the outer engaging groove 577 are recessed so as to engage the outer wall 531 and the outer wall 532.

The upper case 570 is connected to the first hydraulic line L1 and the second hydraulic line L2 to the both sides of the diaphragm 575 on the upper surface of the upper case 5, The movable plate 535 is selectively rotated in both directions with respect to the diaphragm 575 by the hydraulic pressure supplied through the first hydraulic line L2 or the second hydraulic line L2 so as to cover the upper portion of the lower case 530 .

Meanwhile, in the arm for excavators having the rotary device according to the present invention, the lower case 530 is selectively rotated in both directions on the basis of the upper case 570, It is important that the upper arm 320 can be rotated at a certain angle in both directions with respect to the base.

Therefore, the upper portion of the upper connection ring 560 is rotatably connected to the lower end portion of the lower connection ring 520, and the upper connection ring 560 has a U- A guide 561 is formed on the lower connecting ring 520 while a connecting guide 521 is formed on the upper end of the upper connecting ring 520 so as to be bent inwardly with an inverted U shape to be rotatably connected to the engaging guide 561 .

In addition, the arm for an excavator having the rotary device according to the present invention as described above is installed such that the upper case 570 covers the upper portion of the lower case 530, and then, when the lower case 530 is rotated, It is also important that the upper surface of the mounting plate 510 and the lower end of the upper case 570 can be rotated without interference.

For this, the lower portion of the upper case 570 is opened, and the upper end portion of the upper case 530 is opened to open the upper end portion of the lower case 530 to have a thickness larger than that of the lower end portion.

Further, the excavator arm having the rotary device according to the present invention as described above is provided in the shape of a cylinder with the lower case 530 and the upper case 570 passing through a certain center area, The connection to the additional hydraulic lines for supplying the hydraulic pressure to the side of the equipment such as the bucket 400 or the clamp (not shown) for excavation or the like is convenient through the penetrating portion of the additional hydraulic line 570, So that they are not exposed to the outside.

According to the embodiment of the arm for an excavator having the rotary device according to the present invention as described above, the upper arm 320 and the lower arm 310 are fixedly installed, A rotating device 500 is provided which is rotatable to an angle of less than 180 degrees and rotated at a predetermined angle and can be used in a fixed state.

At this time, the structure in which the lower arm 310 is rotatable to an angle of less than 180 degrees in both directions is a structure in which the upper case 570 and the upper case 570 are rotated in accordance with the selective supply of hydraulic pressure to the first hydraulic line L1 or the second hydraulic line L2 An end portion connected to the inner wall 531 of the movable plate 535 and an end portion connected to the inner wall 531 of the movable plate 535 and the diaphragm 575 may be provided to be rotatable in both directions to an angle of less than 180 degrees by a hydraulic supply system that operates the hydraulic supply to a state of being spaced apart from the inner side wall 571 side end .

Of course, the first hydraulic line L1 and the second hydraulic line L2 are disposed between the end portion of the movable plate 535 connected to the inner wall 531 and the end portion of the diaphragm 575 at the inner wall 571 side The space between the upper case 570 and the lower case 530 passes through the upper surface of the upper case 570 from the upper surface of the upper mounting plate 550 to the space between the upper case 570 and the lower case 530, It is preferable to be provided so as to communicate with the inner space side formed by the inner space.

As described above, the arm for an excavator having the rotary device according to the present invention as described above is configured such that the lower arm 310 is rotatable to an angle of less than 180 degrees in both directions, rotated at a predetermined angle, The direction of the excavation work can be changed from the forward excavation work direction to the reverse excavation work direction as well as from the forward excavation work direction or the backward excavation work direction It is possible to easily change the excavation working direction even in an angle inclined direction.

8 is a longitudinal sectional view showing another embodiment of a rotary device which is a substantial part of an excavator arm having a rotary device according to the present invention.

The embodiment of the rotating device as shown in Fig. 8 differs from that of the embodiment of the rotating device described with reference to Figs. 1 to 7 by the supply of the optional hydraulic pressure through the first hydraulic line L1 and the second hydraulic line L2, And only the packing P and the O-ring O for preventing leakage of the hydraulic pressure supplied and discharged at the time of discharge are provided, and a detailed description of the same reference numerals will be omitted.

Referring to FIG. 8, the rotating device as a substantial part of an arm for an excavator having a rotating device according to the present invention includes a lower case 530 and a lower case 530 in a state in which an upper case 570 covers an upper part of the lower case 530 An inner coupling groove 576 is formed on both sides of the inner case 531 and the outer case 532 so that the inner space of the upper case 570 can be closely interrupted from the outside, A packing (P) is further installed along the circumference of the partition (575) where the groove (577) is formed.

The lower case 530 and the upper case 570 may be separated from each other so that the inner space of the lower case 530 and the upper case 570 may be more closely intercepted from the outside in a state in which the upper case 570 covers the upper portion of the lower case 530, It is preferable that a plurality of O-rings O are further installed.

In other words, it is preferable that an O-ring O is further provided at a predetermined interval in a longitudinal direction in which one side of the inner coupling groove 576 and one side of the inner wall 531 of the lower case 530 are in close contact with each other, It is preferable that an O-ring O is further provided at a predetermined interval in the longitudinal direction in which one side of the coupling groove 577 and one side of the outer wall 532 of the lower case 530 closely contact each other.

That is, according to another embodiment of the rotating device, which is a substantial part of the arm for an excavator having the rotating device according to the present invention, as described above, the packing P and the O- The inner space of the lower case 530 and the upper case 570 can be more tightly blocked from the outside in a state in which the upper case 570 covers the upper portion of the upper case 570. [

According to the embodiments of the arm for an excavator having the rotary device according to the present invention as described above, the upper arm 320 and the lower arm 310 are fixedly installed, The rotary device 500 can be rotated up to an angle of less than 180 degrees and rotated at a predetermined angle and can be used in a fixed state to thereby excavate the excavation direction in the forward direction without requiring the separation and re- It is possible to easily change the direction of excavation work in a direction inclined by a certain angle from the direction of forward excavation work or the direction of backward excavation work as well as the working direction and reverse excavation work direction.

Further, even if the excavation direction is the direction of the forward excavation work, the direction of the backward excavation work, as well as the direction of the forward excavation work or the inclination of the backward excavation work, Since the bucket 400 is not required to be separated and reinstalled, it is possible to remarkably increase the efficiency of the excavation work and minimize the fatigue of the worker, thereby improving the work efficiency.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, the invention is not limited thereto. Various modifications may be made by those skilled in the art. Are included in the scope of the present invention.

100: boom 200: arm cylinder
300: Cancer
310: lower arm 320: upper arm
400: Bucket 410: Bucket cylinder
430: connection bracket 450: quick coupler
500: Rotating device
510: lower mounting plate 520: lower connecting ring
521: Connection guide 530: Lower case
531: inner wall 532: outer wall
535: movable plate 550: upper mounting plate
560: upper connection ring 561: engagement guide
570: upper case 571: inner side wall
572: outer wall 575: diaphragm
576: Inner coupling groove 577:
P: Packing O: O-ring
L1: first hydraulic line L2: second hydraulic line

Claims (6)

A bucket 400 is connected to the boom 100 of the excavator and is operated by the arm cylinder 200 and a bucket 400 for excavation is connected to the bucket 400 via a quick coupler 450, The arm 300 is divided into an upper arm 320 and a lower arm 310 so that the upper arm 320 and the lower arm 310 are separated from each other by the upper arm 320 and the lower arm 310, The lower arm 310 is selectively rotated in both directions by a predetermined angle, and the lower arm 310 is selectively rotated in both directions by a predetermined angle in both directions, 500) is fixedly installed in the excavator arm,
A lower mounting plate 510 fixed to the upper end of the lower arm 310;
A lower connecting ring 520 having a lower end fixed to the upper surface of the lower mounting plate 510 and extending upward by a predetermined length;
An inner wall 531 and an outer wall 532 are formed by penetrating a central predetermined area in a cylindrical shape and fixed to the inside of the upper surface on which the lower end of the lower connecting ring 520 of the lower mounting plate 510 is fixed, A lower case 530 on which an upper portion is opened and on which a movable plate 535 is selectively formed between the inner wall 531 and the outer wall 532 to selectively rotate in both directions;
An upper mounting plate 550 having an upper surface fixed to the lower end of the upper arm 320;
An upper connecting ring 560 having an upper end fixed to the bottom surface of the upper mounting plate 550 and extending a certain length downward and having an upper portion rotatably connected to a lower end portion of the lower connecting ring 520; And
The upper surface of the upper mounting plate 550 is fixed to the inside of the bottom surface on which the upper end of the upper connecting ring 560 is fixed. The upper surface of the upper mounting plate 560 is in close contact with the inner circumferential surface A diaphragm 575 connecting the inner side wall 571 and the outer side wall 572 is formed on one side of the lower side and an outer side wall 572 is formed to be in close contact with the side wall 571 so as to surround the outer wall 532 An inner engaging groove 576 and an outer engaging groove 577 are formed so as to engage with the inner wall 531 and the outer wall 532 on the inner side and the outer side of the diaphragm 575, The first hydraulic line L1 and the second hydraulic line L2 are connected to both sides of the diaphragm 575 of the first hydraulic line L1 or the second hydraulic line L2 via the hydraulic pressure supplied to the first hydraulic line L1 or the second hydraulic line L2. The movable plate 535 is selectively rotated in both directions on the basis of the diaphragm 575, Excavator arm having a rotation device, characterized by yirueojim including an upper case 570, which is installed so as to cover the upper portion of the switch 530.
delete The method according to claim 1,
The lower case 530 is selectively rotated in both directions with respect to the upper case 570 so that the lower arm 310 can be rotated at a predetermined angle in both directions with respect to the upper arm 320,
An upper portion of the upper connection ring 560 is rotatably connected to a lower end portion of the lower connection ring 520,
The upper connecting ring 560 is formed with an engaging guide 561 having a U-shaped inwardly bent shape,
Wherein the lower connection ring 520 is formed with a connection guide 521 having a reverse "U " shape at an upper end thereof and bent outwardly to be rotatably connected to the engagement guide 561. [ Cancer.
The method according to claim 1,
The upper surface of the lower mounting plate 510 and the lower end of the upper case 570 are interfered with each other when the lower case 530 is rotated while the upper case 570 covers the upper portion of the lower case 530 In order to be able to rotate without being driven,
Wherein a lower portion of the upper case (570) is opened and a thickness of a closed top portion is formed such that an upper portion of the lower case (530) is opened to be thicker than a thickness of a closed bottom portion cancer.
The method according to claim 1,
The lower case 530 and the upper case 570 may be integrally formed with each other so that the inner space of the lower case 530 and the upper case 570 can be closely intercepted from the outside in a state in which the upper case 570 covers the upper portion of the lower case 530,
A packing P is formed on both sides of the diaphragm 575 in which an inner engaging groove 576 and an outer engaging recess 577 are formed in which the inner wall 531 and the outer wall 532 of the lower case 530 are engaged, Wherein the rotary device is further provided with a rotary device.
6. The method according to claim 1 or 5,
The lower case 530 and the upper case 570 may be integrally formed with each other so that the inner space of the lower case 530 and the upper case 570 can be closely intercepted from the outside in a state in which the upper case 570 covers the upper portion of the lower case 530,
An O-ring O is further installed at a predetermined interval in the longitudinal direction in which one side of the inner coupling groove 576 and one side of the inner wall 531 of the lower case 530 are in close contact with each other,
Wherein an O-ring (O) is further installed at a predetermined interval in the longitudinal direction in which one side of the outer coupling groove (577) and the side of the outer wall (532) of the lower case (530) closely contact each other. cancer.
KR1020150099382A 2015-07-13 2015-07-13 Arm for excavator with rotating device KR101668757B1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20200096011A (en) * 2019-02-01 2020-08-11 정경래 Quick Coupler for Excavator

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Publication number Priority date Publication date Assignee Title
KR200404282Y1 (en) * 2005-09-29 2005-12-21 (주) 삼전건설 The Poclain which a right and left rotary motion is possible to install the bucket.
KR20100074428A (en) 2008-12-24 2010-07-02 두산인프라코어 주식회사 An excavator capable of twisting at boom or arm
KR20140021084A (en) 2012-08-06 2014-02-20 강완배 Bucket rotating device of excavator

Patent Citations (3)

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Publication number Priority date Publication date Assignee Title
KR200404282Y1 (en) * 2005-09-29 2005-12-21 (주) 삼전건설 The Poclain which a right and left rotary motion is possible to install the bucket.
KR20100074428A (en) 2008-12-24 2010-07-02 두산인프라코어 주식회사 An excavator capable of twisting at boom or arm
KR20140021084A (en) 2012-08-06 2014-02-20 강완배 Bucket rotating device of excavator

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20200096011A (en) * 2019-02-01 2020-08-11 정경래 Quick Coupler for Excavator
KR102232864B1 (en) * 2019-02-01 2021-03-26 정경래 Quick Coupler for Excavator

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