KR101793948B1

KR101793948B1 - Safety Lock Type Quick Coupler

Info

Publication number: KR101793948B1
Application number: KR1020150164420A
Authority: KR
Inventors: 진 환 박
Original assignee: 강토중공업 (주)
Priority date: 2015-11-24
Filing date: 2015-11-24
Publication date: 2017-11-08
Also published as: KR20170060628A

Abstract

The present invention relates to a safety lock type quick coupler comprising an outer body (3); A fixing hook 5 for holding and fixing the first engagement pin P1 of the working mechanism; A movable hook (7) for fixing or releasing the second engagement pin (P2) of the work mechanism in accordance with the rotation position; A fixed hook latch 9 for locking or unlocking the first engagement pin P1; A movable hook latch (11) for locking or unlocking the second engagement pin (P2); An operating cylinder 13 having one end connected to one end of the movable hook 7 and one end connected to the other end of the movable hook 7 so as to rotate the movable hook 7 at one end of the fixed hook 5 to the outer body 3; The rotation of the movable hook 7 is linked to the rotation of the fixed hook latch 9 so that the fixed hook latch 9 is locked when the movable hook 7 is fixed and the movable hook 7 is fixed A hook interlocking linkage (15) for unlocking the fixed hook latch (9) when released; And locking the movable hook latch (11) when the fixed hook latch (9) is locked by coupling the rotation of the fixed hook latch (9) to the rotation of the movable hook latch And a hook-linkage linkage (17) for unlocking the movable hook latch (11) when the movable hook is unlocked, so that the actuating link, which is pressed by the movable hook, Since the fixed hook latch is operated while moving, the friction resistance and noise due to the operation of the fixed hook latch can be minimized.

Description

Safety Lock Type Quick Coupler [0001]

The present invention relates to a safety lock type quick coupler, and more particularly, to a safety lock type quick coupler which is mounted on various construction machines, particularly at the end of a boom of an excavator, so that a work mechanism can be detachably replaced according to the type of work, The present invention relates to a safety lock type quick coupler that prevents separation of a work mechanism and doubles work safety.

Generally, a construction machine using a boom such as an excavator is capable of replacing a boom-end working mechanism so that it can be used for various purposes in various working environments. That is, the excavator is a working device, for example, a bucket for sanding, a breaker for breaking concrete, and a forceps for moving reinforcing bars or the like. However, in order to use the excavator for various purposes as described above, it is inevitably required to replace the work equipment. For this purpose, a quick coupler is employed at the tip of the boom.

The quick coupler not only has to be compatible with the above-mentioned work mechanism but also has recently been improved so that the work mechanism can be replaced quickly and easily.

As one of them, the present applicant has proposed a safety lock device for a quick coupler (Patent No. 10-1542226). The locking device includes a fixed hook 105, a movable hook 107, a fixed hook latch 109, a movable hook latch 111, and a locking hook 105 formed at the lower end of the outer body 103, The operation cylinder 113 and the hook interlocking linkage 115 to grip the engagement pins P1 and P2 of the work mechanism such as the bucket so that the work mechanism can be quickly and easily attached and detached.

Therefore, the locking device 101 employs the hook interlocking linkage 115 to link the rotation of the movable hook 107 with the rotation of the fixed hook latch 109 when the work mechanism is separated, The movable hook 107 is rotated in the counterclockwise direction about the pivot pin 133 to open the movable hook 107 to the fixed release position indicated by the hidden line so that the operation of the hook interlocking linkage 115 The roller 141 is pressed to rotate the fixed hook latch 109 in the counterclockwise direction through the operation bar 143. [ Accordingly, the fixed hook latch 109 is released to the position indicated by the hidden line by interlocking with the rotation of the movable hook 107, thereby releasing the fixing to the first engagement pin P1. By the hook interlocking linkage 117 The movable hook latch 111 is also opened. Conversely, when connecting the working mechanism, the actuating cylinder 113 is stretched to fix the second engaging pin P2 by the movable hook 107. In this process, the pressing force of the actuating hook 107 against the actuating roller 141 The fixed hook latch 109 is returned to the original locking position by the restoring force of the torsion spring to grip the first engagement pin P1.

The conventional safety lock device 101 for a quick coupler as described above is constructed such that the operating bar 143 of the hook interlocking linkage 115 for interlocking the rotation of the movable hook 107 with the fixed hook latch 109 is guided by the guide block 142 Since the direction of the force applied to the actuating roller 141 by the movable hook 107 does not coincide with the direction of movement of the actuating bar 143 moved by the actuating bar 143, Only the parallel horizontal force is used to pivot the fixed hook latch 109 and the vertical force perpendicular to the operating bar 143 is applied to the guide block 142 so that frictional resistance is generated by the guide block 142, There is a problem that failure or performance deterioration is caused by the hook interlocking linkage 115 such that the operating load is increased on the cylinder 113 and wear and noise are generated at the contact portion between the guide block 142 and the operation bar 143 there was.

KR 10-1542226

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems of the conventional quick coupler and to improve the structure of the hook interlocking linkage that links the rotation of the movable hook to the rotation of the fixed hook interlock, The purpose of the present invention is to improve the performance of the quick coupler by eliminating the power loss, abrasion, or operation noise that has occurred.

In order to achieve the above object, A fixing hook installed at one side of the outer body for fixing and fixing the first engaging pin of the working mechanism; A movable hook which is rotatably installed on the outer body at the opposite side of the fixed hook and fixes or releases the second engagement pin of the work mechanism in accordance with the rotation position; A fixed hook latch rotatably coupled to the outer body at one side of the fixed hook to lock or unlock the first engagement pin; A movable hook latch rotatably coupled to the outer body at one side of the movable hook to lock or unlock the second engaging pin; An operation cylinder having one end connected to the external body at one side of the fixed hook and the other end connected to one end of the movable hook to rotate the movable hook; The fixed hook latch is locked between the fixed hook latch and the movable hook so that the rotation of the movable hook is linked to the rotation of the fixed hook latch to lock the fixed hook latch when the movable hook is fixed, A hook interlocking linkage for unlocking the fixed hook latch; And a movable hook latch which is provided between the fixed hook latch and the movable hook latch to lock the movable hook latch when the fixed hook latch is locked by associating the rotation of the fixed hook latch with the rotation of the movable hook latch, And a hook interlocking linkage for unlocking the movable hook latch when the hook portion is unlocked.

Further, the hook interlocking linkage may include an actuating link having one end pinned to the outer body and the other end pressed or depressed by the movable hook; And a push link having one end connected to the other end of the operating link and the other end pin-coupled to the opposite side of the pocket of the fixed hook latch, wherein the first link pin and the first pivot pin are fixed It is preferable to perform a four-bar link motion.

Further, the operating link is arranged to abut one end of the movable hook, which is pivoted to the fixed release position, to lock or unlock the fixed hook latch via the push link when the movable hook is fixed or released .

In addition, it is preferable that the movable hook further includes at least one rolling member which is mounted on a contact surface abutting against the actuating link, and which is in rolling contact with the actuating link.

Preferably, the actuating link further includes at least one rolling member mounted on a contact surface abutting the movable hook, the rolling member being in rolling contact with the movable hook.

Further, it is preferable that the rolling member is a rolling roll or a rolling ball.

According to the safety lock type quick coupler of the present invention, the hook interlocking linkage is constituted by an operation link and a push link constituting a quadruple link body together with a fixed hook latch, so that when the operation link is pressed by the movable hook, , The force applied to the actuation link is transmitted to the push link while linking the hook-linkage linkage four times, so that the fixed hook latch can be safely and quietly operated while minimizing frictional resistance or noise.

Further, since the operating link contacting the movable hook can keep the contact surface with the movable hook broadly in the form of a gentle curved line, the concentration of stress due to contact with the movable hook is reduced and therefore the durability is improved, It is possible to greatly reduce a failure or performance deterioration due to breakage or the like.

1 is a front view showing a state in which a conventional quick coupler is partially omitted.
2 is a bottom perspective view illustrating a safety lock type quick coupler according to an embodiment of the present invention;
FIG. 3 is a bottom perspective view illustrating the outer body part of FIG. 2; FIG.
Fig. 4 is a perspective view showing the front side of the outer body omitted in Fig. 3; Fig.
Fig. 5 is a front view of Fig. 4; Fig.
FIG. 6 is a rear view showing the rear side of the outer body in FIG. 3;
Fig. 7 is a view showing the state in which the movable hook and the hook interlocking linkage shown in Fig. 5 start or end contact with each other and start to unlock the fixed hook latch or have finished locking.
Fig. 7 is a view showing the state in which the movable hook and the hook interlocking linkage shown in Fig. 5 start or end contact with each other and start to unlock the fixed hook latch or have finished locking.
Fig. 8 is a view showing the movable hook, the hook interlocking linkage and the fixed hook latch shown in Fig. 5 in a fully opened state; Fig.
9 is a view showing the movable hook, the hook interlocking linkage and the fixed hook latch in a fully opened state according to another embodiment of the present invention.
10 is a view showing a movable hook, a hook interlocking linkage and a fixed hook latch in a fully opened state according to another embodiment of the present invention.

Hereinafter, a safety lock type quick coupler according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

The quick coupler of the present invention mainly includes an outer body 3, a fixed hook 5, a movable hook 7, a fixed hook latch 9, a movable hook latch 11, A working cylinder 13, a hook interlocking linkage 15, and a hook interlocking linkage 17. [

2, the outer body 3 is a part of the structure of the quick coupler 1. The outer body 3 includes a front plate 21 and a rear plate 23 formed of a plurality of plate members, And a plurality of connecting rods 25 and reinforcing plates 27 and 28. The reinforcing plates 27 are fixed to the moving hooks 29 as shown in FIG. The outer body 3 is connected to the boom of the excavator through a connecting rod 25 or the like and is fixed to the lower end of the fixed hook 5 or the movable hook 7 by a work such as a bucket, The mechanism is combined.

As shown in Figs. 2 to 6, the fixing hook 5 is a means for holding and fixing the engagement pin of the working mechanism as described above. The fixing hook 5 is provided at one side of the outer body 3, Concave. At this time, the fixed hook 5 is opened to the right side and is directed to the opposite side to the operating direction of the movable hook 7, so that there is no abnormality in the parts involved in operating the movable hook 7 such as the operating cylinder 13 The first engaging pin P1 of the working mechanism can be fixed without using the abnormally fixed hook latch 9. Therefore, the fixed hook latch 9 is not an indispensable element for fixing the first engagement pin P1, and is a redundant safety device against malfunction of the operation cylinder 13 and the like.

The movable hook 7 is a means for fixing or releasing the second engagement pin P2 of the working mechanism on the opposite side of the fixed hook 5. As shown in Figs. 2 to 8, And is rotatably installed on one side of the body 3, that is, on the lower left side in the figure through a second pivot pin 33. 3 or 5 to 8, the tip of the push rod 37 of the actuating cylinder 13 is rotatably supported at the stop portion via the second pivot pin 33 . Therefore, the movable hook 7 is rotated about the second pivot pin 33 by the operating cylinder 13, and the second engaging pin P2 of the working mechanism is fixed or released according to the rotating position . In other words, the second engaging pin P2 is fixed when rotated in the direction of arrow A in Fig. 5, and is unfastened when the second engaging pin P2 is rotated in the direction of arrow B in the opposite direction.

As described above, the fixed hook latch 9 is a safety device for ensuring the safety of the quick coupler 1 in a redundant manner. As shown in FIGS. 2 to 8, the fixed hook latch 9 is provided at one side of the fixed hook 5 And is pivotally connected to the upper chamber in the drawing by the first pivot pin 31. The torsion spring 35 wound around the first pivot pin 31 as shown in Figs. So that the first engagement pin P1 shown in Figs. 2 to 7 is locked. Therefore, even when the movable hook 7 can not fix the second engaging pin P2 due to a failure or the like, as described above, when the fixed hook latch 9 is in the locked position, It is possible to prevent the work mechanism from being separated from the quick coupler 1 by holding the hook pin 9 on the first engagement pin P1. On the other hand, the fixed hook latch 9 wins the resistance of the torsion spring 35 when the pressing force of the movable hook 7 is transmitted through the hook interlocking linkage 15 to be described later and rotates around the first pivot pin 31 Thereby unlocking the first engagement pin P1.

As shown in Figs. 2 to 8, on the one side of the movable hook 7, that is, on the side of the coaxial shaft 1 in the figure, And is rotatably coupled to the outer body 3 by a second pivot pin 33. As shown in Fig. 6, the linkage 17 is interlocked with the fixed hook latch 9 by a latching interlocking linkage 17 2 pivot pin 33 to thereby lock or unlock the second engagement pin P2. Therefore, even if a failure occurs in the operating cylinder 13 or the like in a state where the movable hook latch 11 is locked, the first engaging pin P1 is supported by the fixing hook 5 and the movable hook latch 11 The working mechanism such as a bucket is not separated from the quick coupler 1 by the fixing hook 5 but also by the movable hook latch 11, P2 are prevented from falling downward, thereby preventing the workpiece housed in the work mechanism such as the bucket from being poured down.

2 to 8, one end of the actuating cylinder 13, that is, the right end of the cylinder body in the figure is connected to the outer body 3, And the other end, that is, the left end of the push rod 37 in the drawing, is rotatably pin-coupled to the stop of the movable hook 7. As shown in Fig. Therefore, the actuating cylinder 13 pivots the movable hook 7 in the fixed or unlocked state by the expanding and contracting operation. When the movable hook 7 is extended, the movable hook 13 is rotated in the direction of arrow A in Fig. The movable hook 7 is rotated in the direction of the arrow B in Fig. 5 to bring the movable hook 7 into the unlocked state.

As described above, the hook interlocking linkage 15 is a transmission means for linking the rotation of the movable hook 7 to the rotation of the fixed hook latch 9, and as shown in Figs. 2 to 8, And is fixed between the latch 9 and the movable hook 7 so as to lock the fixed hook latch 9 when the movable hook 7 is fixed as shown in Fig. 7, ) Is unlocked, the fixed hook latch 9 is unlocked.

For this purpose, the hook interlocking linkage 15 is again constituted by the operation link 41 and the push link 43, and one end of the push link 43 is connected to the fixed hook latch 9, Link motion like a four-bar link. First, the operating link 41 is a pressure receiving portion that directly receives a pressing force by the movable hook 7, and as shown in Figs. 3 to 5, Fig. 7 and Fig. 8, The upper end is rotatably pin-coupled to the outer body 3 by the first link pin 51 and the other end, that is, the lower end in the drawing is connected to the one end of the push link 43 by the second link pin 53 3 and 4, the surface contacting the movable hook 7 is widened in a gentle curved shape and extended in the front and rear directions to form a contact area with the movable hook 7 So that the contact stress is not concentrated at one point when it is pressed by the movable hook 7.

3 to 5, Fig. 7, and Fig. 8, the push link 43 is connected to the fixed hook latch 9, The left end in the drawing is pin-coupled to the lower end of the actuating link 41 by means of the second link pin 53 so as to be relatively rotatable, and the other end, that is, the right end in the figure is fixed by the third link pin 55, A first link pin 51 for pin-connecting the operating link 41 to the outer body 3 and a fixed hook latch 9 for connecting the outer body 3 to the outer body 3, The first pivot pin 31 to which the operating link 41 is pin-coupled as a fixing point, thereby transmitting the force applied to the operating link 41 to the fixed hook latch 9 without loss.

5, 6, and 7, the hook interlocking linkage 15 is arranged such that the rotation locus of the operating link 41 overlaps with the rotation locus of the movable hook 7, The movable hook 7 and the lower end of the operating link 41 are brought into contact with each other so that the fixed hook latch 9 is in the locked position when the movable hook 7 is in the fixed position as shown in FIG. , The fixed hook latch 9 is pivoted by the push link 43 to the unlocked position when it is in the unlocked position as shown in Fig.

The latch interlocking linkage 17 is a transmission means for linking the rotation of the fixed hook latch 9 with the rotation of the movable hook latch 11. As shown in Figs. 2, 3, 4, and 6, The lower end of the drawing is pin-coupled to the opposite side of the pocket 45 of the fixed hook latch 9, and the other end, that is, the upper end of the drawing, And is pin-coupled to the opposite side of the pocket 47 of the movable hook latch 11. 6, the movable hook latch 11 is locked when the fixed hook latch 9 is locked and the fixed hook latch 9 (not shown) is unlocked in the direction of arrow C in Fig. 6 6, the movable hook latch 11 is rotated in the direction of the arrow D to release the lock.

On the other hand, as another embodiment of the present invention, the movable hook 7 may be mounted with one or more rolling members 47 on the contact surface which abuts the actuating link 41, as shown in Fig. 9 . At this time, the size, type or number of the rolling member 47 can be determined arbitrarily. When the rolling member 47 comes into contact with the operating link 41 such as a rolling roll or a rolling ball, Any one capable of minimizing the contact friction between the operating link 7 and the operating link 41 can be employed.

Further, as another embodiment of the present invention, the operating link 41 can be mounted on one or more of the rolling members 47 on the contact surface that abuts the movable hook 7, as shown in Fig. 10 have. In this case as well, the size and type or the number of the rolling members 47 can be arbitrarily determined. When the rolling member 47 is rotated after contacting with the movable shaft 7, that is, in rolling contact with the movable shaft 7, The contact friction of the link 41 can be minimized.

At this time, as the rolling member 47, as shown in Figs. 9 and 10, a plurality of rolling rolls arranged in an up-and-down arrangement or in the form of a lattice can be used.

Now, the operation of the safety lock type quick coupler 1 according to the preferred embodiment of the present invention will be described as follows.

When the initial working mechanism is mounted on the quick coupler 1 of the present invention, the first engaging pin P1 of the working mechanism is fixed by the fixed hook 5 and the fixed hook latch 9, The quick coupler 1 and the working mechanism enter the fastened state while the second engagement pins P2 of the working mechanism are gripped by the movable hook 7 and the movable hook latch 11, respectively.

At this time, the fixed hook 5 can simultaneously connect the work mechanism by fixing the first and second engagement pins P1 and P2 simultaneously with the movable hook 7 which is pressed against the pocket 49. [ However, when the movable hook 7 is unfixed when a failure occurs in the operation cylinder 13, the first and second engagement pins P1 and P2 move to the right side in the figure, ). If the fixed hook latch 9 keeps the first engaging pin P1 in the locked state even if such a failure occurs, the first engaging pin P1 is prevented from moving So that it can be prevented from being detached from the fixed hook 5. However, in the case of a vessel type in which a workpiece is housed in a work such as a bucket, sufficient safety measures can not be taken by preventing the workpiece from being separated in the event of a failure. That is, as described above, when the movable hook 7 is moved to the fixed release position due to the failure of the operating cylinder 13, the first engaging pin P1 is engaged with the fixed hook 5 and the fixed hook latch 9 An accident occurs in which the workpiece inside the bucket is poured downward when the second engagement pin P2 portion of the bucket is sagged downward. In order to prevent this, the movable hook latch 11 is provided to prevent the movable hook 11 from deflecting the second engaging pin P2 at the locked position even if the movable hook 7 is disengaged, .

In order to separate the working mechanism in such a connected state, first, as shown in Fig. 7, the operating cylinder 13 is contracted and the movable hook 7 is rotated in the direction of the arrow E as shown in Fig. Thus, the movable hook 7 comes into contact with the operating link 41 of the hook interlocking linkage 15.

8, the movable hook 7 is pivoted to the unlocking position, and at the same time, the actuating link 41 is pushed to the maximum, and the 4-link motion The fixed hook latch 9 is pivoted in the direction of the arrow C through the push link 43 that performs the pushing operation. As a result, the fixed hook latch 9 moves to the unlocked position.

At the same time, the movable hook latch 11, which is connected to the fixed hook latch 9 via the latch interlocking linkage 17, is pulled by the latch interlocking linkage 17 to rotate in the direction of arrow D in Fig. 2 Unlock the coupling pin (P2).

When the movable hook 7, the fixed hook latch 9 and the movable hook latch 11 are both opened in this way, the first engaging pin P1 is pulled out of the fixing hook 5, It is possible to complete the separation of the main body 1.

On the other hand, when the operating link 41 is pushed by the movable hook 7 as described above, the rolling member 47 is brought into contact with the contact surface of the movable hook 7 or the operating link 41 The movable hook 7 or the actuating link 41 is brought into rolling contact by the rolling member 47 while the movable hook 7 is kept in contact with the actuating link 41 while the actuating link 41 is being pressed The frictional resistance generated between the movable shaft 7 and the actuating link 41 can be greatly reduced even if no oil is applied to the contact surface.

In the case where the work mechanism is to be coupled to the quick coupler 1 again, the above separation process may be performed in the reverse order. That is, when the first engagement pin P1 is inserted into the fixed hook 5 and the actuating cylinder 13 is extended, the contact between the movable hook 7 and the actuating link 41 is released at any moment, The movable hook 9 is moved to the locked position by the restoring force of the torsion spring 35 and the movable hook latch 11 is also moved to the locked position by the latch interlocking linkage 17. [ When the operating cylinder 13 is finally extended to grip the moving hook 13 with the movable hook 11 by pressing the second engaging pin P2 by the movable hook 7, the quick coupler 1 and the working mechanism You will be able to connect again.

1: Quick coupler 3: External body
5: fixed hook 7: movable hook
9: Fixed hook latch 11: Movable hook latch
13: operating cylinder 15: hook interlocking linkage
17: linkage linkage 23: rear plate
31: first pivot pin 33: second pivot pin
35: Torsion spring 37: Push rod
41: operation link 43: push link
47: rolling members 51, 53, 55: first, second and third link pins
P1, P2: first and second engagement pins

Claims

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An outer body 3;
A fixing hook (5) provided at one side of the outer body (3) for fixing and fixing the first engaging pin (P1) of the working mechanism;
A movable hook (7) rotatably installed on the outer body (3) on the opposite side of the fixed hook (5) and fixing or releasing the second engagement pin (P2) of the working mechanism in accordance with the rotation position;
A fixed hook latch 9 rotatably coupled to the outer body 3 at one side of the fixed hook 5 to lock or unlock the first engagement pin P1;
A movable hook latch 11 rotatably coupled to the outer body 3 at one side of the movable hook 7 to lock or unlock the second engagement pin P2;
An operating cylinder 13 having one end connected to one end of the movable hook 7 and one end connected to the other end of the movable hook 7 so as to rotate the movable hook 7 at one end of the fixed hook 5 to the outer body 3;
The movable hook 7 is provided between the fixed hook latch 9 and the movable hook 7 so that the rotation of the movable hook 7 is linked to the rotation of the fixed hook latch 9, A hook interlocking linkage 15 for locking the fixed hook latch 9 and unlocking the fixed hook latch 9 when the movable hook 7 is released; And
The fixed hook latch 9 is provided between the fixed hook latch 9 and the movable hook latch 11 so that the rotation of the fixed hook latch 9 is linked to the rotation of the movable hook latch 11, And a latch interlocking linkage (17) for locking the movable hook latch (11) when the fixed hook latch (9) is unlocked and unlocking the movable hook latch (11) when the fixed hook latch (9) is unlocked,
The hook interlocking linkage (15)
An operating link 41, one end of which is coupled to the outer body 3 by a first link pin 51 and the other end which is pressed or released by the movable hook 7; And
The other end of the actuating link 41 is coupled to the second link pin 53 and the other end of the actuating link 41 is connected to a third link pin 55 on the opposite side of the pocket 45 of the fixed hook latch 9, 43, < / RTI >
The fourth link link movement is performed with the first link pin 51 and the first pivot pin 31 as fixed points,
The operation link 41 is disposed so as to abut the one end with the movable hook 7 which is pivoted to the fixed release position so that when the movable hook 7 is fixed or released, Wherein the fixed hook latch (9) is adapted to lock or unlock the fixed hook latch (9).

The method of claim 3,
Characterized in that the movable hook (7) further comprises at least one rolling member (47) mounted on the contact surface abutting the actuating link (41) and in rolling contact with the actuating link (41) Lockable quick coupler.

The method of claim 3,
Characterized in that the operating link (41) further comprises at least one rolling member (47) mounted on a contact surface abutting the movable hook (7) and rolling contact with the movable hook (7) Lockable quick coupler.

The method according to claim 4 or 5,
Wherein the rolling member (47) is a rolling roll or a rolling ball.