KR101651856B1 - Triple safety device for quick coupler - Google Patents

Triple safety device for quick coupler Download PDF

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Publication number
KR101651856B1
KR101651856B1 KR1020150045319A KR20150045319A KR101651856B1 KR 101651856 B1 KR101651856 B1 KR 101651856B1 KR 1020150045319 A KR1020150045319 A KR 1020150045319A KR 20150045319 A KR20150045319 A KR 20150045319A KR 101651856 B1 KR101651856 B1 KR 101651856B1
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KR
South Korea
Prior art keywords
hitch
attachment pin
quick coupler
cylinder tube
cylinder
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KR1020150045319A
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Korean (ko)
Inventor
박찬환
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(주)정우엠텍
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Priority to KR1020150045319A priority Critical patent/KR101651856B1/en
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Publication of KR101651856B1 publication Critical patent/KR101651856B1/en

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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
    • E02F3/36—Component parts
    • 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
    • E02F3/3622—Devices to connect tools to arms, booms or the like of the quick acting type, e.g. controlled from the operator seat with a hook and a locking element acting on a pin
    • 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
    • E02F3/96—Dredgers; Soil-shifting machines mechanically-driven with arrangements for alternate or simultaneous use of different digging elements

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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)
  • Quick-Acting Or Multi-Walled Pipe Joints (AREA)

Abstract

The present invention can automatically prevent any detachment between the attachment pin and the fixed hook in the connection process of the quick coupler for connecting the heavy-duty attachment and the excavator. In addition, To a triple safety device for a quick coupler which is capable of operation of the device and which prevents any disengagement of the fixing hook and the attachment pin by using the elastic force of the compression spring, the tensile force of the tension spring, and the locking protrusion formed on the fixing hook.
A triple safety device for a quick coupler according to the present invention includes a quick coupler body 100 connected to an arm of an excavator, a fixed hook provided on one side of the quick coupler body 100 and coupled to the first attachment pin 21, And the second attachment pin 22 is coupled to the cylinder rod 220 of the hydraulic cylinder 200 at the other side of the quick coupler body 100 to advance the cylinder rod 220. [ And a locking means 300 for preventing a disengagement of the fixed hook 110 and the first attachment pin 21 from each other, wherein the locking means 300 includes a hydraulic cylinder A compression spring 320 provided between the fixing member 310 and the hitch 120 to apply a compressive elastic force to the cylinder tube 210 of the fixing member 310; And the other end of the cylinder tube 210 is fixed to the body support 150, A tension spring 330 for applying a tensile force to the body support 150 so as to pull the cylinder tube 210 toward the body support 150 and a tension spring 330 coupled to one side of the cylinder tube 210 and interlocked with the cylinder tube 210, And a first attachment pin (21) which is provided on the inner surface of the quick coupler body (100) so as to be able to slide back and forth between the hook (110) and the first attachment pin A guide protrusion 360 protruding from both sides of the hitch 120 and slidably moved to the movement guide 350 and a guide protrusion 360 protruding from both sides of the hitch 120, And a stopper 370 is provided to limit the backward movement of the hitch 120 by contacting the guide protrusion 360 when the hitch 120 is moved backward.

Description

{TRIPLE SAFETY DEVICE FOR QUICK COUPLER}

The present invention relates to a triple safety device for a quick coupler. In particular, in the connecting process of a quick coupler for connecting a heavy-duty attachment to an excavator, the attachment pin and the quick coupler body are prevented from being arbitrarily released, A quick coupler having a structure improved to prevent any detachment of the fixed hook and the attachment pin by using the elastic force of the compression spring, the tensile force of the tension spring, and the locking protrusion formed on the fixed hook Triple safety device.

Generally, heavy equipment used in construction site or civil engineering site, for example, excavator is widely used construction equipment such as road construction, waterworks and drainage construction, construction foundation construction, land construction construction, And various attachments are selectively installed according to the operation of the system.

For example, it is possible to use a bucket for grounding, crushing and rebuilding concrete buildings using a crusher, rock and concrete destruction using a breaker, and scrap and rock transport using a grab , And work on the foundation work of construction of vertical shaft and waterworks and sewerage using clamshell bucket. It is possible to perform various work while replacing various kinds of attachments.

In general, the attachment is attached to the arm of the excavator so that it can be replaced with the purpose of the work, and recently, a separate coupler is mounted on the arm of the excavator, and a quick coupler Has been developed and widely used.

The quick coupler is rigidly mounted to the arm of the excavator and the push link of the cylinder through the two pin coupling structures in the quick coupler body, and is structured so that the attachment can be fastened by using the fixed hook and the hitch.

Accordingly, the operator can easily handle and use the attachment by a method in which the operator of the excavator operates the lever to couple or separate the quick coupler mounted on the end of the arm to a bucket, a breaker, or the like.

On the other hand, the quick coupler is equipped with a safety device, for example, a safety pin, as a means to prevent the risk of separation of the attachment due to a malfunction of the hydraulic cylinder in the quick coupler or damage to the hydraulic hose .

However, when replacing an attachment such as a bucket or a breaker in a quick coupler, the worker must manually manually remove the safety pin from the attached attachment or fasten the safety pin after mounting the new attachment, which makes the work difficult and cumbersome In addition, there is a disadvantage that it takes a lot of time to work.

Prior art related to this is disclosed in Korean Patent Registration No. 10-0739341 entitled " Heavy-duty Attachment Coupler with Automatic Safety Device "(Registered Date: 2007.07.09), the transfer hook is connected to a hydraulic cylinder and an automatic safety device cylinder And the automatic safety device cylinder is unlocked only when the hydraulic cylinder is normally released. In this case, however, the automatic safety device cylinder must be separately provided.

As another prior art, in Korean Registered Patent Publication No. 10-1210833 entitled " automatic safety device of a quick coupler "(registration date: 2012.12.05), on the upper side of the fixed hook The hitch is interlocked to prevent the pin from coming off. However, there is still a problem due to the failure of the hydraulic cylinder or the damage of the hydraulic hose, and the reliability of the safety device is low.

In the case of the existing quick coupler, since the hitch is rotated with respect to the hinge so as to be coupled with the attachment pin, there is a disadvantage that there is a restriction on the surrounding environment at the time of engagement and disengagement.

Further, there is a disadvantage in that the structure of the safety device for preventing the engagement state with the attachment pin coupled to the fixed hook is not arbitrarily released, and the maintenance of the parts is not easy.

Korean Registered Patent Publication No. 10-0739341 entitled "Heavy-duty Attachment Coupler with Automatic Safety Device" (Registered on July 7, 2007) Korean Registered Patent Publication No. 10-1210833 entitled "Automatic Safety Device of Quick Coupler" (Registered on December 22, 2012)

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and its object is to simplify a structure of a locking device capable of safely maintaining a state of engagement between an attachment pin and a quick coupler fixing hook, The locking hooks of the fixed hooks can be easily operated in association with the operation of the hydraulic cylinder that operates the hitches after the assembling of the heavy-duty attaching pin, and the locking hooks of the fixed hooks can be easily removed by using the elastic force of the compression spring, And a triple safety device of a quick coupler whose structure is improved to prevent any deviation of the attachment pin.

According to an aspect of the present invention,
A quick coupler body connected to the arm of the excavator; a fixed hook provided at one side of the quick coupler body and coupled with the first attachment pin; and a fixed hook provided on the other side of the quick coupler body and connected to the cylinder rod of the hydraulic cylinder, And a locking means for preventing any disengagement of the fixed hook and the first attachment pin from each other, wherein the locking means is fixed to the outside of the cylinder tube of the hydraulic cylinder A compression spring which is provided between the fixing member and the hitch to apply a compression elastic force and one end of which is connected to the other side of the fixing member and the other end of which is fixed to the body support so as to apply a tensile force to pull the cylinder tube toward the body support A tension spring coupled to one side of the cylinder tube and interlocked when the cylinder tube is moved A first attachment pin disposed on the upper side of the fixed hook for blocking the separation of the fixed hook and the first attachment pin, and a movement guide provided on the inner side of the quick coupler body facing each other for allowing the hitch to slide forward and backward, A guide protrusion formed on the outer side of the hitch so as to slide on the movement guide and a guide protrusion protruding upward from an end of the movement guide to restrict the backward movement of the hitch, And a stopper is provided.

And the oil pressure supplied to the other direction of the hydraulic cylinder to reverse the hitch is larger than the spring force of the compression spring and the tension spring.

The separation block is fixed to one side of the cylinder tube and interlocked with the movement of the cylinder tube. The separation block is detachably coupled to the lower side of the connection block, and is disposed on the upper side of the first attachment pin when the connection block is moved forward And a separation preventing plate for blocking the separation of the first attachment pin from the fixing hook.

And the fixing hook is formed such that a locking protrusion protrudes in a direction to reduce the width of the entry opening at the end of the entry port side where the first attachment pin enters.

And the connection block is further provided with a hydraulic circuit for transmitting an external hydraulic pressure to the inside of the cylinder tube.

According to the present invention, the hitch is moved back and forth in such a manner that the hitch is slidably moved on the inner side surfaces facing each other in accordance with the forward and backward movement of the cylinder rod, and by the reaction force generated in forward and backward movement of the hitch, As a result of the movement of the cylinder tube in the left and right directions, the departure prevention block connected to the end of the cylinder tube interlocks with the movement of the cylinder tube to selectively perform the departure-preventing function of the first attachment pin, It is possible to prevent the safety pin from being detached from the attachment pin and to secure the assembled state of the first attachment pin assembled to the fixed hook to improve the safety.

Further, since the hitch is slidably moved to the quick coupler body by the rod operation of the cylinder, the present invention has an advantage that the engagement and disengagement of the hitch and the second attachment pin are facilitated.

Also, in the emergency state in which the hydraulic pressure is not supplied to the hydraulic cylinder due to leakage or the like, the cylinder tube and the departure prevention block are pulled toward the body support by the tensile force of the tension spring, It is advantageous in that the deviation direction of the first attachment pin is limited to a diagonal line due to the structural property of the fixing hook having the hooking protrusion, so that it is interfered with the escape prevention plate to block any deviation.

In addition, the present invention provides a resilient force that pushes the hitch outward even in an emergency during a leaking state, so that it can perform a function of preventing any deviation of the hitch and the second attachment pin even if a problem occurs in the cylinder, A force greater than the elastic force of the compression spring is applied to the body, and even if the body is detached, the length of the free length remains. Thus, the force to push the cylinder toward the body support so that the separation prevention plate is positioned above the first attachment pin Therefore, even when either one of the tension spring and the compression spring is broken and only one of the compression spring and the tension spring is operated, not only the hydraulic pressure problem but also the spring force causes the release prevention plate to move to the upper side of the first attachment pin So that the first attachment pin can be prevented from departing from the first attachment pin do.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a triple safety device for a quick coupler according to the present invention. FIG.
Fig. 2 is an exploded perspective view of the locking means and the quick coupler body of the present invention; Fig.
3 is a front view showing the locking means and the cylinder of the present invention.
FIGS. 4A, 4B and 4C are explanatory views showing a locking operation state of the fixed hook of the present invention, and FIGS. 5A and 5B are explanatory views showing a detaching operation for releasing the locking means of the present invention.

The present invention can automatically prevent any detachment between the attachment pin and the fixed hook in the connection process of the quick coupler for connecting the heavy-duty attachment and the excavator. In addition, Thereby enabling operation of the apparatus.

1 to 5, a triple safety device for a quick coupler according to the present invention includes a quick coupler body 100 mounted on an end of an excavator arm and a push link, A second attachment pin 22 provided on the other side of the quick coupler body 100 and coupled with the second attachment pin 22 according to the operation of the hydraulic cylinder 200, The hitch 120 is engaged with the hydraulic cylinder 200 for operating the hitch 120 and the locking hook 110 and the first attachment pin 21 are prevented from being disengaged arbitrarily. (300).

1 to 4, the locking means 300 includes a fixing member 310 fixed in the form of a band outside the cylinder tube 210 of the hydraulic cylinder 200, A compression spring 320 provided between the member 310 and the hitch 120 to apply a compressive elastic force to the body 310 and the other end of the compression spring 320 is connected to the other side of the fixing member 310 by a ring, A tension spring 330 fixed to the cylinder tube 210 to apply a tensile force to the cylinder tube 210 so as to pull the cylinder tube 210 toward the body support 150. When the cylinder tube 210 is moved, (340) disposed on the upper side of the first guide pin (110) and blocking the detachment of the fixed hook (110) and the first attachment pin (21) When the hitch 120 is moved backward, Projection 360 is in contact is configured as a stopper 370 to limit the backward motion of the hitch (120).

The fixing member 310 is integrally fixed to an outer side of an intermediate portion of the cylinder tube 210 and has a structure in which a compression spring 320 is supported on one side and a one end portion of a tension spring 330 is connected on the other side.

The fixing hook 110 has a structure in which the engaging protrusion 112 protrudes upward in the drawing in a direction of reducing the width of the entry opening at the end of the entry port side where the first attachment pin 21 enters.

The engagement protrusion 112 has a function of preventing the first attachment pin 21 from being displaced in the horizontal direction when the first attachment pin 21 is detached through the entry port in a state where the first attachment pin 21 is engaged in the fixed hook 110 .

3, the locking means 300 includes a movement guide 350 provided on the inner side surfaces of the quick coupler body 100 facing each other so that the hitch 120 can be slid forward and backward, And a guide protrusion 360 protruding from both sides of the hitch 120 and slidably moved to the movement guide 350 so that the hitch 120 moves forward and backward of the cylinder rod 220 In the horizontal direction.

The stopper 370 is formed to protrude from the end of the movement guide 350 to restrict backward movement of the hitch 120. [

The compression spring 320 is elastically biased to push the cylinder tube 210 toward the body support 150 as one end is supported by the hitch 120 and the other end is supported by the fixing member 310. [

That is, the compression spring 320 provides an elastic force to push the hitch 120 outward even in an emergency during a leakage, so that even if a problem occurs in the hydraulic cylinder 200, the hitch 120 and the second attachment pin 22, A force larger than the elastic force of the compression spring 320 is applied to the hitch 120 and the length of the free length of the free length remains, 344 act as a force to push the hydraulic cylinder 200 toward the body support 150 so as to be positioned on the upper side of the first attachment pin 21 coupled to the fixed hook 110.

One end of the tension spring 330 is connected to the other side of the fixing member 310 and the other end is connected to the body support 150 to give a tensile force to pull the cylinder tube 210 toward the body support 150.

The cylinder tube 210 and the escape prevention block 340 are pulled toward the body support 150 by the tensile force of the tension spring 330 even when the hydraulic pressure is not transmitted to the hydraulic cylinder 200 due to leakage or the like So that it is possible to prevent any deviation of the first attachment 21.

The separation prevention block 340 is fixed to one side of the cylinder tube 210 and interlocks with the movement of the cylinder tube 210. As the external hydraulic pressure is transmitted, The connection block 342 is detachably coupled to the lower side of the connection block 342 by a fastening member such as a bolt and is disposed on the upper side of the first attachment pin 21 when the connection block 342 is moved forward And an escape prevention plate 344 for preventing the first attachment pin 21 from being detached from the fixing hook 110.

In the present invention having such a configuration, after the quick coupler body 100 is connected to the end of the excavator arm (not shown) and the push link, the excavator arm is operated to move the fixed hook 110 To the first attachment pin (21). In addition, reference numeral 410 in FIG. 2 is a known connecting pin 410 connecting the quick coupler body 100 to an excavator arm.

When hydraulic pressure is applied to the hydraulic cylinder 200 in one direction for advancing the cylinder rod 220, as shown in FIG. 4B, the cylinder rod 220 is moved in the forward direction The hitch 120 is moved to the side of the second attachment pin 22 and the hitch 120 is coupled to the second attachment pin 22.

The hitch 120 is slid in the horizontal direction while the guide protrusions 360 protruding outward from both sides are guided by the movement guides 350 formed on both inner side surfaces of the quick coupler body 100 facing each other.

At this time, the separation prevention block 340 is located at a position spaced apart from the body support 150.

When the unidirectional oil pressure is continuously transmitted to the hydraulic cylinder 200 even when the hitch 120 is coupled to the second attachment pin 22, the forward reaction force F1 is applied to the cylinder rod 220 as shown in FIG. 4C And the cylinder tube 210 moves toward the side of the body support 150 (right side in the drawing) opposite to the advancing direction of the hitch 120 by the forward reaction force F1.

At this time, when the cylinder tube 210 is moved by the reaction force, the tensile force of the tension spring 330 acts to push the cylinder tube 210 toward the body support 150, so that the movement force of the cylinder tube 210 It acts as an auxiliary force.

As the cylinder tube 210 moves toward the body support 150, the release prevention block 340 coupled to the end of the cylinder tube 210 interlocks with the release prevention plate 344 to move the first attachment pin 21).

As the first attachment pin 21 is positioned on the first attachment pin 21 in a state where the first attachment pin 21 is engaged with the fixed hook 110, Together with the first attachment pin 112, to prevent the first attachment pin 21 from departing from the entrance.

5A, when the oil pressure is applied to the hydraulic cylinder 200 in the other direction for moving the hitch 120 backward, the cylinder rod (not shown) The hitch 120 is retracted to release the engagement with the second attachment pin 22.

5B, the guide protrusion 360 of the hitch 120 is slid in the movement guide 350 and is operated in the backward direction. Then, the guide protrusion 360 is hooked on the stopper 370 formed at the end of the movement guide 350, A reverse reaction force F2 is generated on the side of the cylinder rod 220 as the oil pressure of the cylinder 200 is supplied to the cylinder 200 in a state where the backward movement of the hitch 120 is limited. The cylinder tube 210 moves to the hitch 120 side (left side in the figure).

At this time, the pressure (hydraulic pressure or pneumatic pressure) supplied to the hydraulic cylinder 200 is higher than the force of the spring that combines the elastic force of the compression spring 320 and the tension force of the tension spring 330 when the cylinder tube 210 is moved to the left It works with great power.

In addition, when the cylinder tube 210 is moved to the left, the separation preventing block 340 is interlocked with the separation preventing plate 344 so that the separation preventing plate 344 is moved to the left so that the function of preventing the first attachment pin 21 from departing from the entrance is released.

Therefore, according to the present invention, the hitch 120 is moved back and forth in a manner that the hitch 120 is slidably moved on the opposite inner side surfaces of the quick coupler body 100 according to the forward and backward movement of the cylinder rod 220, The cylinder tube 210 is moved in the left and right directions by the forward and backward reaction forces F1 and F2 generated in the forward and backward movements of the cylinder tube 210. As the cylinder tube 210 moves, The detachment prevention block 340 connected to the end of the first attachment pin 21 interlocks with the first attachment pin 21 to selectively prevent the first attachment pin 21 from separating from the first attachment pin 21 coupled to the fixed hook 110 It has the advantage of preventing safety accidents.

Since the hitch 120 is slidingly moved to the quick coupler body 100 by the operation of the cylinder rod 220 of the hydraulic cylinder 200 according to the present invention, the engagement of the hitch 120 and the second attachment pin 22, It is advantageous in that the removal operation is simplified.

Since the tension spring 330 is connected to the fixing member 310 and the body support 150 in an emergency situation in which no hydraulic pressure is applied to the hydraulic cylinder 200 due to leakage or the like, The tensile force of the first attachment pin 330 pulls the cylinder tube 210 and the release prevention block 340 toward the body support 150 so that the release prevention plate 344 is positioned above the first attachment pin 21, The first attachment pin 21 is restricted in the diagonal direction so that it is interfered with the escape prevention plate 344 so that any deviation is blocked.

Since the compression spring 320 provides an elastic force to push the hitch 120 outward even in an emergency during leakage, even if a problem occurs in the hydraulic cylinder 200, the hitch 120 and the second attachment pin 22, A force larger than the elastic force of the compression spring 320 is applied to the hitch 120 and the length of the free length of the free length remains, 344 act as a force to push the hydraulic cylinder 200 toward the body support 150 so as to be positioned on the upper side of the first attachment pin 21 coupled to the fixed hook 110.

The separation prevention plate 344 according to the present invention is not limited to the above-described oil pressure problem, and the tension spring 330 or the compression spring 320 may be broken individually so that only one of the compression spring 320 and the tension spring 330 The release prevention plate 344 is positioned on the upper side of the first attachment pin 21 by the force of the spring so that the first attachment pin can be prevented from being separated from the first attachment pin.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention. It is therefore intended that such variations and modifications fall within the scope of the appended claims.

21: first attachment pin 22: second attachment pin
100: quick coupler body 110: fixed hook
112: Hook 120: Hitch
150: Body support 200: Hydraulic cylinder
210: cylinder tube 220: cylinder rod
300: locking means 310: fixing member
320: Compression spring 330: Tension spring
340: departure prevention block 342: connection block
344: Disengagement prevention plate 350: Movement guide
360: guide projection 370: stopper

Claims (5)

A fixed hook 110 provided on one side of the quick coupler body 100 to be coupled to the first attachment pin 21 and a second coupling pin provided on the side of the quick coupler body 100, A hitch 120 connected to the cylinder rod 220 of the hydraulic cylinder 200 and coupled to the second attachment pin 22 during a forward movement of the cylinder rod 220, And locking means (300) for preventing the first attachment pin (21) from being disengaged in an arbitrary state,
The locking means 300 includes a fixing member 310 fixed to the outside of the cylinder tube 210 of the hydraulic cylinder 200,
A compression spring 320 provided between the fixing member 310 and the hitch 120 to apply a compressive elastic force,
A tension spring 330 which is connected at one end to the other end of the fixing member 310 and the other end is fixed to the body support 150 to apply a tensile force to pull the cylinder tube 210 toward the body support 150,
And is connected to one side of the cylinder tube 210 and interlocked with the movement of the cylinder tube 210 so as to be disposed on the upper side of the fixed hook 110 to be separated from the fixed hook 110 and the first attachment pin 21 Prevention block 340,
A movement guide 350 provided on inner side surfaces of the quick coupler body 100 facing each other to allow the hitch 120 to slide forward and backward,
A guide protrusion 360 protruding from both sides of the hitch 120 and slidably moved to the movement guide 350,
And a stopper 370 protruding upward from an end of the movement guide 350 to limit the backward movement of the hitch 120 when the guide protrusion 360 is in contact with the hitch 120 when the hitch 120 is moved backward Triple safety device for quick coupler. The method according to claim 1,
The oil pressure supplied to the other direction of the hydraulic cylinder 200 to move the hitch 120 backward is greater than the spring force of the compression spring 320 and the tension spring 330, Triple safety device for quick coupler. The method according to claim 1,
The separation prevention block 340 includes a connection block 342 fixed to one side of the cylinder tube 210 and interlocked with the movement of the cylinder tube 210,
The connection block 342 is detachably connected to the lower side of the connection block 342 and is disposed on the upper side of the first attachment pin 21 when the connection block 342 is moved forward to release the first attachment pin 21 from the fixing hook 110 And a separation prevention plate (344) for blocking the separation of the liquid from the separation plate (344). The method according to claim 1,
Wherein the fixing hook (110) is formed so that a locking protrusion (112) protrudes in a direction of reducing the width of the entry opening at an end of the entry port side where the first attachment pin (21) enters. . The method of claim 3,
Wherein the connection block (342) is further provided with a hydraulic circuit for transmitting an external hydraulic pressure to the inside of the cylinder tube (210).
KR1020150045319A 2015-03-31 2015-03-31 Triple safety device for quick coupler KR101651856B1 (en)

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Cited By (10)

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Publication number Priority date Publication date Assignee Title
KR101820405B1 (en) * 2017-01-05 2018-01-22 대모 엔지니어링 주식회사 Auto safty device for quick coupler
WO2018128385A1 (en) * 2017-01-05 2018-07-12 대모 엔지니어링 주식회사 Safety device for quick coupler
WO2020107069A1 (en) * 2018-11-30 2020-06-04 Hughes Asset Group Pty Ltd A coupler
WO2020128075A1 (en) * 2018-12-21 2020-06-25 Geith International Limited A coupler for coupling an attachment to a dipper arm
DE102021134486B3 (en) 2021-12-23 2022-09-15 Béla Cseri Besitzunternehmung GbR (vertretungsberechtigter Gesellschafter: Béla Cseri, 89129 Langenau) quick coupler
KR20230063713A (en) * 2021-11-02 2023-05-09 대모 엔지니어링 주식회사 Grab connecting structure of excavator
GB2616614A (en) * 2022-03-14 2023-09-20 Bamford Excavators Ltd A quick coupler
KR102616192B1 (en) * 2023-11-06 2023-12-21 유한회사 대한중공업 Quick coupler for excavator with multi safety apparatus
CN118029463A (en) * 2024-04-07 2024-05-14 烟台江土机械设备有限公司 Anti-drop, durable excavator connector
KR102674015B1 (en) 2023-06-29 2024-06-11 주식회사 제이케이 Link-type disconnection prevention device for quick coupler

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KR20110005057A (en) * 2009-07-09 2011-01-17 주식회사 에버다임 Attachment coupler for heavy machinery having a safety locking device
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KR101210833B1 (en) 2012-07-26 2012-12-11 주식회사 필엔지니어링 Automatic safety device for quick coupler

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KR101210833B1 (en) 2012-07-26 2012-12-11 주식회사 필엔지니어링 Automatic safety device for quick coupler

Cited By (16)

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WO2018128385A1 (en) * 2017-01-05 2018-07-12 대모 엔지니어링 주식회사 Safety device for quick coupler
CN110088405A (en) * 2017-01-05 2019-08-02 韩国大模技术株式会社 Quick-attachable coupling safety device
US11261577B2 (en) 2017-01-05 2022-03-01 Daemo Engineering Co., Ltd. Safety device for quick coupler
KR101820405B1 (en) * 2017-01-05 2018-01-22 대모 엔지니어링 주식회사 Auto safty device for quick coupler
CN113557336B (en) * 2018-11-30 2023-10-24 休斯资产集团有限公司 Coupling device
WO2020107069A1 (en) * 2018-11-30 2020-06-04 Hughes Asset Group Pty Ltd A coupler
CN113557336A (en) * 2018-11-30 2021-10-26 休斯资产集团有限公司 Coupling device
WO2020128075A1 (en) * 2018-12-21 2020-06-25 Geith International Limited A coupler for coupling an attachment to a dipper arm
US11952737B2 (en) 2018-12-21 2024-04-09 Geith International Limited Coupler for coupling an attachment to a dipper arm
KR20230063713A (en) * 2021-11-02 2023-05-09 대모 엔지니어링 주식회사 Grab connecting structure of excavator
KR102558579B1 (en) 2021-11-02 2023-07-24 대모 엔지니어링 주식회사 Grab connecting structure of excavator
DE102021134486B3 (en) 2021-12-23 2022-09-15 Béla Cseri Besitzunternehmung GbR (vertretungsberechtigter Gesellschafter: Béla Cseri, 89129 Langenau) quick coupler
GB2616614A (en) * 2022-03-14 2023-09-20 Bamford Excavators Ltd A quick coupler
KR102674015B1 (en) 2023-06-29 2024-06-11 주식회사 제이케이 Link-type disconnection prevention device for quick coupler
KR102616192B1 (en) * 2023-11-06 2023-12-21 유한회사 대한중공업 Quick coupler for excavator with multi safety apparatus
CN118029463A (en) * 2024-04-07 2024-05-14 烟台江土机械设备有限公司 Anti-drop, durable excavator connector

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