KR20180001622A - Push Type Double Locking Quick Coupler - Google Patents

Abstract

The present invention relates to a push-type double locking quick coupler (1) comprising: an outer body (3); a fixing hook (5) for inserting and fixing a first coupling pin (P1) of a working tool; a movable hook (7) for fixing or separating a second coupling pin (P2) of the working tool according to a rotation position; a fixing hook latch (9) for locking or unlocking the first coupling pin (P1) according to a fixing or separating operation of the movable hook (7); and an operating cylinder (11) for operating the movable hook (7), wherein the operating cylinder (11) includes a locking spring (55) fitted to the circumference of the push rod (53) to press the movable hook (7) together with the push rod (53) at the fixing position of the second coupling pin (P2). Accordingly, a safety device for preventing the working tool from being unexpectedly separated from the coupler to lead an accident is simply provided with one compression spring, and thus the internal structure of the coupler can be simplified. Therefore, production quality or efficiency can be improved.

Description

Push Type Double Locking Quick Coupler

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a push type double lock quick coupler, and more particularly, to a push type double lock quick coupler which is mounted on a boom of various construction machines, particularly an excavator, To a push type double lock quick coupler that prevents the detachment of the working mechanism by an internal locking device, thereby doubling the 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-described work mechanism but also has recently been improved in such a direction that the work of replacing the work tool can be quickly and easily performed.

One example is a coupler 101 shown in Fig. 1, which is a push type coupler. The coupler 101 includes a fixed hook 105 formed at the lower end of the outer body 103, The first and second engagement pins P1 and P2 of the work mechanism such as the bucket are gripped by the operation cylinder 107 and the operation cylinder 111 or the like so that the work mechanism can be attached and detached quickly and easily.

Therefore, when the working mechanism is mounted, the coupler 101 is fixed by first hooking the fixing hook 105 to the first engaging pin P1, positioning the movable hook 107 at the position shown by the phantom line, The cylinder 111 is operated and is pushed by the push rod 153 to rotate in the direction opposite to the arrow B. Accordingly, when the movable hook 107 fastens and secures the second engagement pin P2, the coupler 101 can easily mount the work mechanism via the first and second engagement pins P1 and P2.

Conversely, when separating the working mechanism mounted on the coupler 101, the operation cylinder 111 is operated to contract the push rod 153 to rotate the movable hook 107 in the direction of the arrow B, The first engaging pin P1 may be pulled out from the fixing hook 105 after releasing it from the engaging pin P1.

However, in the conventional coupler 101 as described above, when the operating cylinder 111 loses its pressing force due to a failure or the like, the fixing of the second engagement pin P2 by the movable hook 107 is released, There is a problem that the apparatus can be separated into injustices and cause various accidents.

In order to solve such a problem, a coupler such as the one disclosed in Japanese Patent No. 10-1392049 (a quick coupler having a double automatic safety key) has been proposed. However, this coupler prevents or prevents the release of the movable hook when the operating cylinder fails The use of a large number of components makes it possible to increase the safety of use. However, the overall operation performance may be deteriorated to deteriorate the product quality, the production efficiency may be decreased, the production cost may increase, I had a problem.

KR 10-1392049

The present invention has been proposed in order to solve the problems of the conventional quick coupler as described above, and it is an object of the present invention to provide a quick coupler which is capable of quickly replacing a work mechanism by a detachable type, It is an object of the present invention to improve the quality and production efficiency of a product by simplifying a structure for preventing detachment as well as improving safety of use.

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 and locking or unlocking the first engaging pin in accordance with a fixing or releasing operation of the movable hook; And an operating cylinder rotatably coupled to one side of the outer body at one end and pivotally coupled to one side of the movable hook at the other end to operate the movable hook, And a lock spring which is fitted around the push rod to press the movable hook together with the push rod at the second engagement pin fixing position.

Further, the fixed hook latch has a locking end protruded in the middle to restrain the first engaging pin to the fixing hook at the first engaging pin locking position, and the locking hook is engaged with the movable hook at the second engaging pin releasing position And the return spring is extended to release the lock to the first engagement pin when it is pressed and pivoted and the return spring is attached to one side for returning to the first engagement pin locking position when the pressing by the movable hook is released desirable.

In addition, the outer body preferably includes a receiving jaw arranged in a U-shape along the edge of the fixing hook to support the rotating end so that the fixed hook latch holds the first engaging pin locking position.

The return spring is fitted around the pivot pin mounted on the pivot shaft of the fixed hook latch so as to pivotably support the fixed hook latch so that one end is connected to the outer body, Are preferably torsion springs fixed to the fixed hook latches, respectively.

According to the push type double lock quick coupler of the present invention, even if the operating cylinder, which presses and fixes the movable hook against the coupling pin when the working mechanism is mounted, becomes inoperable due to failure or the like, The operation hook is still held in the engagement pin fixing position, so that the work mechanism is separated from the coupler due to unintentional injuries and can be prevented from leading to an accident, and furthermore, safety can be ensured.

Furthermore, since the above-described safety device is simply implemented as a compression spring which is fitted around the push rod of the operating cylinder, the internal structure of the coupler can be simplified, and the production quality and efficiency can be doubled. .

1 is a front view showing a conventional quick coupler.
Fig. 2 is a front view of the push type double lock quick coupler according to the embodiment of the present invention in a state before assembling the work implement. Fig.
Fig. 3 is a front view of the push type double lock quick coupler of Fig. 2 in a state after the work implement is assembled; Fig.
Fig. 4 is a plan view of Fig. 2; Fig.
Fig. 5 is an enlarged plan view of the fixed hook latch shown in Fig. 2; Fig.

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

The quick coupler according to the present invention is mainly composed of an outer body 3, a fixed hook 5, a movable hook 7, a fixed hook latch 9, And a cylinder (11).

2 to 4, the outer body 3 includes a front plate 21 and a rear plate 23, which are formed of a plurality of plate materials, And a reinforcing plate 27. The reinforcing plate 27 is provided with a moving link 29 which acts as a hook for transporting the link. Therefore, the outer body 3 is coupled to the float of the excavator through the connecting rod 25 or the like. The outer body 3 is supported by the holding hook 5 or the movable hook 7 protruding downward by a holding means such as a bucket, Thereby joining the working mechanism.

3, the outer body 3 includes a receiving jaw 28 arranged in a U-shape along the edge of the fixing hook 5, as shown in Fig. 3, When the fixed hook latch 9 holds the first engaging pin P1 fixed to the fixed hook 5 by supporting the rotating end 45 of the fixed hook latch 9 when the engaging pin P1 is in the locking position So that it can be kept in a locked state.

2 and 3, the fixing hook 5 is a means for fixing the first engaging pin P1 of the engaging pins of the working mechanism as described above. The fixing hook 5 is provided on one side of the outer body 3, And is formed concavely in the form of a hook at the lower right end in the drawing. At this time, the fixed hook 5 opens to the right side and is directed to the opposite side to the operating direction of the movable hook 7, so that no abnormality occurs in the parts involved in operating the movable hook 7, such as the operating cylinder 11 The first engagement pin P1 can be fixed without using the abnormal hook hanger 9. Therefore, the fixed hook latch 9 is not an essential element for fixing the first engagement pin P1, and is a redundant safety device against malfunction of the operation cylinder 11 and the like.

The movable hook 7 is a means for fixing or releasing the second engaging pin P2 of the working mechanism on the opposite side of the fixed hook 5. As shown in Figs. 2 and 3, And is rotatably installed on one side of the body 3, that is, on the lower left side in the figure through a first rotation pin 31. [ Therefore, the movable hook 7 is rotated about the first rotating pin 31 by the operating cylinder 11, and the second engaging pin P2 of the working mechanism is fixed or released according to the rotating position . 3, when the push rod 53 is pushed by the push rod 53 to rotate in the direction of arrow A in Fig. 2, the second engagement pin P2 is fixed, The second coupler pin P2 is released and the quick coupler 1 is called a push type.

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, 3 and 5, The movable hook 7 is rotatably coupled to one side of the fixed hook 5 by the second rotating pin 33 in the upper right room in the drawing and is fixed or released with respect to the second engaging pin P2. ), Thereby locking or unlocking the first engagement pin P1.

To this end, the fixed hook latch 9 is provided with a locking end 41 in the middle, as shown in Figs. 2, 3 and 5, one end of which is fixed to the fixed end 43, (45) are formed. At this time, the locking end 41 is a hook protruding from the middle lower end portion of the fixed hook latch 9, and the locking pin 41 is fixed to the fixing hook 5 at the locking position of the first coupling pin P1 as shown in Fig. Even if the fixation of the fixing hook 5 to the second engagement pin P2 at the fixing position of the second engagement pin P2 is released unintentionally for any reason by restricting the engagement pin P1, P1, so that it is possible to prevent the work mechanism from completely falling off from the quick coupler 1 and falling down. The pivotal motion stage 45 is elongated to be pivotable by being pushed by the movable hook 7 at the second engagement pin P2 disengagement position and is held at the lock position of the first engagement pin P1 And is supported by the receiving jaw 28 described above. The fixed end 43 is a portion that rotatably supports the fixed hook latch 9 on the outer body 3 and is fastened to the outer body 3 by the second rotating pin P2, Which is the rotation axis of the fixed hook latch 9, so as to return the fixed hook latch 9 to the locked position of the first engagement pin P1 when the pressing by the hook 7 is released, A return spring 47 is mounted around the circumference P2. At this time, in the return spring 47, the right arm 48 is fixed to the outer body 3 and the left arm 49 is fixed to the fixed hook latch 9, so that the return spring 47 can repel the rotation of the fixed hook latch 9 Respectively.

As shown in FIGS. 2 to 4, the actuating cylinder 11 is an actuator for actuating the movable hook 7 as mentioned above, and the right end of the actuating cylinder 11, that is, the fixed end of the cylinder body 51, The left end of the push rod 53 is rotatably coupled with the pin 36 to the stop of the movable hook 7 in the figure. Accordingly, the actuating cylinder 11 pivots the movable hook 7 to the fixed or unlocked position by the expansion and contraction operation. When the movable hook 7 is extended, the actuating cylinder 11 rotates in the direction of the arrow A in Fig. The movable hook 7 is rotated in the direction of the arrow B in FIG. 3 and is positioned at the fixed release position.

In particular, the actuating cylinder 11 has a lock spring 55 which is mounted on itself, i.e. around the push rod 53, as shown in Figures 2 to 4, Is pressed between the hook 7 and the cylinder body 51 so as to press the movable hook 7 together with the push rod 53 at the second engagement pin P2 fixed position shown in Fig. At the second engaging pin (P2) disengaging position, the working cylinder (11) is compressed to the maximum by the movable hook (7). That is, at the second engagement pin P2 disengagement position, the operation cylinder 11 not only rotates the movable hook 7 to this position, but also compresses the lock spring 55 to the maximum through the movable hook 7 . At this time, as shown in Figs. 2 to 4, the operating cylinder 11 is provided with a finishing plate 57 fitted around the second turning pin P2 so as to be interposed between the lock spring 55 and the movable hook 7 It is preferable that the contact between the lock spring 55 and the movable hook 7 is maintained more stably.

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

In order to mount a work mechanism such as a bucket on the quick coupler 1 of the present invention, first, as shown in FIG. 2, a fixing hook 5 and a fixing hook 5 are provided between the first and second engagement pins P1 and P2 of the working mechanism The working mechanism is arranged on the bottom surface of the quick coupler 1 so that the movable hook 7 is positioned.

The push rod 53 is extended to the left in the figure so that the movable hook 7 is moved in the direction of the arrow C in the drawing. Then, when the first engaging pin P1 is fitted to the fixed hook 5 and then the actuating cylinder 11 is operated, (A) direction. At the same time, the fixed hook latch 9, whose restraint by the movable hook 7 is released, also gradually restrains the first engagement pin P1 while rotating counterclockwise by the reaction force of the return spring 47. [

3, when the movable hook 7 is fitted and fixed to the second engagement pin P2, the extension of the push rod 53 stops further, and the second engagement pin P2 reaches the fixed position do. At the same time, the fixed hook latch 9 completely released from the movable hook 7 is pushed by the receiving end 28 of the receiving end 28 by the resilient force of the return spring 47, The first engagement pin P1 is locked by the locking end 41 protruding downward on the bottom surface, so that the first engagement pin P1 reaches the lock position.

At this time, since the operating cylinder 11 presses the movable hook 7 by the elastic force of the lock spring 55 as well as the push rod 53, the operation cylinder 11 pushes the push rod 53 against the movable hook 7 The movable hook 7 can be held at the fixed position by the repulsive force of the lock spring 55 and thus the second engagement pin P2 can be prevented from being disengaged from the movable hook 7 even if the pressing force is lost.

3, the operation cylinder 11 is operated to contract the push rod 53 to pull the movable hook 7 in the direction of the arrow B, P2. ≪ / RTI > At this time, since the operating cylinder 11 compresses the locking spring 55 through the movable hook 7 and the finishing plate 57 which rotate in the approaching direction, the locking spring 55 is rotated by the rotation of the movable hook 7 It does not cause any trouble at all.

The movable hook 7 at the end of the rotation pushes the pivotal end 45 of the fixed hook latch 9 and presses the repulsion of the return spring 47 by the pressure so that the fixed hook latch The lock pin 41 is released upward from the lock position to unlock the first engagement pin P1 as shown in Fig. 2. As a result, the lock pin 41 is disengaged from the fixed hook 5, (P1) can be released. In this way, the quick coupler 1 in which the first and second engagement pins P1 and P2 are separated from the fixed hook 5 and the movable hook 7 can easily separate the work mechanism, By repeating the above process, the work mechanism can be detached again.

1: Quick coupler 3: External body
5: fixed hook 7: movable hook
9: Fixed hook latch 11: Operation cylinder
28: receiving jaws 31, 33: first and second rotating pins
47: return spring 31, 33: first and second rotating pins
53: push rod 55: lock spring
P1, P2: first and second engagement pins

Claims (4)

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;
The first hook 5 is rotatably coupled to the outer body 3 so that the first engaging pin P1 is locked or unlocked according to the operation of fixing or releasing the movable hook 7 Fixed hook latch (9); And
An operation cylinder (11) rotatably coupled to one side of the outer body (3) at one end and pivotally coupled to one side of the movable hook (7) at the other end to operate the movable hook (7); And,
The operating cylinder 11 is provided with a lock spring 55 fitted around the push rod 53 so as to press the movable hook 7 together with the push rod 53 at the second engagement pin P2 fixed position Push type double lock quick coupler. The method according to claim 1,
The fixed hook latch (9)
A locking end 41 protrudes in the middle to restrain the first engaging pin P1 to the fixing hook 5 at the locking position of the first engaging pin P1,
The rotating end 45 is extended to release the lock with respect to the first engaging pin P1 when it is pushed and rotated by the movable hook 7 at the second engaging pin P2 releasing position,
And a return spring (47) is mounted on one side to return to the lock position of the first engagement pin (P1) when the pressurization by the movable hook (7) is released. The method of claim 2,
The outer body 3 is fixed to the outer surface of the fixing hook 5 along the edge of the fixing hook 5 so as to support the pivotal end 45 so that the fixed hook latch 9 keeps the first engaging pin P1 locked position ≪ / RTI > characterized in that it comprises a receiving jaw (28) which is shaped like a letter. The method of claim 2,
The return spring 47 is fitted around the pivot pin 33 mounted on the rotary shaft of the fixed hook latch 9 so as to pivotally support the fixed hook latch 9 so that the fixed hook latch 9, Is a torsion spring, one end of which is fixed to the outer body (3) and the other end is a torsion spring fixed to the fixed hook latch (9) so as to counteract the rotation of the fixed hook latch (9).

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