KR101785211B1 - Pull Type Double Locking Quick Coupler - Google Patents

Abstract

The present invention relates to a full type double lock quick coupler (1), 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) which fixes and fixes the second engagement pin (P2) of the working mechanism when it is rotated to the fixed position, and releases and fixes the second engagement pin (P2) when it is rotated to the fixed release position; A fixed hook latch (9) for locking or unlocking the first engagement pin (P1) according to the fixing or unlocking operation of the movable hook (7); And an operating cylinder (11) which is extended at the fixed position and which is contracted at the fixed releasing position to actuate the movable hook (7) in a fixed or a disengaged position, The cylinder 11 includes a lock spring 55 which is fitted around the push rod 53 to press the movable hook 7 together with the push rod 53 at the second engagement pin P2 fixed position The lock spring provided between the operating cylinder body and the movable hook still holds the movable hook in the engaging pin fixing position so that the work mechanism is unintentionally disconnected from the coupler in advance It is possible to further improve the work safety.

Description

Full Type Double Locking Quick Coupler {Pull Type Double Locking Quick Coupler}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a full type double lock quick coupler, and more particularly to a full type double lock quick coupler which is mounted on various construction machines, particularly at the end of a boom of an excavator, Type double quick lock quick coupler in which the work mechanism is prevented from being separated by an internal locking device to double 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 of such a coupler is a coupler 101 shown in FIG. 1, which is a pull 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.

The coupler 101 fixes the fixing hook 105 to the first engaging pin P1 first and presses the actuating cylinder 111 with the push rod 153 by operating the actuating cylinder 111, And the hook 107 is rotated in the direction of the arrow C. Thus, when the movable hook 107 is fixed to the lock bar 128 by the second engagement pin P2, the coupler 101 can be easily operated through the first and second engagement pins P1 and P2 So that the apparatus can be mounted.

Conversely, when separating the work mechanism mounted on the coupler 101, the push rod 153 is contracted by operating the actuating cylinder 111 so as to rotate the movable hook 107 in the direction opposite to the arrow C, 2 from the engagement pin P2 and then pull out the first engagement pin P1 from the fixed hook 105. [

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 was a problem that the apparatus could be accidentally separated 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 second engaging pin provided on the opposite side of the fixed hook so as to be pivotable with respect to the outer body, to fix and fix the second engaging pin of the working mechanism when rotated to the fixed position, A movable hook releasing fixing; 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 the other end is rotatably pivotally connected to one side of the movable hook so that the push rod is extended at the fixed position and is contracted at the fixed releasing position, Wherein the actuating cylinder comprises a lock spring which is fitted around the push rod to urge the movable hook together with the push rod at the second engaging pin securing position Full-type double lock quick coupler.

The interlocking linkage may be configured such that one end of the interlocking linkage is rotatably coupled to the actuating cylinder and the other end of the interlocking linkage is pivotally coupled to the fixed hook latch so that the fixed hook latch can be locked or unlocked And an interlocking linkage for unlocking the interlocking linkage.

The interlocking linkage may include a first link, one end of which is rotatably coupled to the actuating cylinder cylinder body, and an interrupting member which is pressurized or depressed by the securing or releasing operation of the movable hook; And a second link coupled to the fixed hook latch such that one end is pin-coupled to the other end of the first link and the other end unlocks or locks the fixed hook latch in accordance with a pressurizing or releasing operation of the first link .

The fixed hook latch includes a rotary arm projecting from a position adjacent to the rotary pin and rotatably coupled with the other end of the second link; And a return spring connected to one side and returning to the first engagement pin locking position when the pressing of the second link with respect to the rotation arm is released.

It is preferable that the return spring is a torsion spring which is fitted around the pivot pin and is resiliently repulsive to the rotation of the fixed hook latch so that one end is fixed to the outer body and the other end is fixed to the fixed hook latch.

According to the full type double lock quick coupler of the present invention, even if the operation cylinder, which presses and fixes the movable hook against the coupling pin when the work mechanism is mounted, becomes inoperable due to a failure or the like, Since the movable hook is still held in the engagement pin fixing position, it is possible to prevent the work mechanism from being accidentally separated from the coupler due to unintentional injuries, and thus the work safety can be further enhanced.

In addition, since the above-described safety device is simply implemented as a compression spring that 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, and maintenance and service life can be further improved .

In addition, regardless of the presence or absence of a component involved in operating the movable hook, such as an actuating cylinder, the fixed hook latch always locks the first engagement pin of the work mechanism in the fixed hook before the interlocking linkage is pressed by the movable hook So that it is possible to prevent an accident that the work mechanism is unexpectedly separated from the coupler beforehand, and thus the work safety can be further enhanced.

1 is a front view showing a conventional quick coupler.
FIG. 2 is a front view of a full type double lock quick coupler according to an embodiment of the present invention in a state before assembly of a work tool. FIG.
Fig. 3 is a front view of the full type double lock quick coupler of Fig. 2 in a state after assembling the working mechanism. Fig.
Fig. 4 is a plan view of Fig. 2; Fig.
5 is a view showing the inside of the quick coupler shown in Fig.

Hereinafter, a full 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 is a part of the external shape of the quick coupler 1, and includes a front plate 21 and a rear plate 23 formed of a plurality of plate members, And a plurality of connecting rods 25 for connecting the front and rear plates 21 and 23 to each other. At both ends of the front plate 21 and the rear plate 23, a moving link 29 is provided. 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.

2 and 3, the support body 27 is fixed to the outer body 3 along the bottom edge of the fixing hook 5 by bolts, and the return spring 47, which will be described later, And a lock bar 28 for holding and fixing the second engagement pin P2 together with the movable hook 7 is attached to the outer wall facing the movable hook 7. [

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 such as the bucket mentioned above, That is, on the lower right end in the drawing. At this time, the fixed hook 5 is opened to the right side and the fixing operation of the movable hook 7 does not produce the reaction force. However, in the no-load state due to the failure of the operating cylinder 11, The first engaging pin P1 can be stably fixed regardless of whether the operating cylinder 11 is faulty or not.

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 Figures 2 and 3, And one end corresponding to the position of the hook handle is rotatably installed on one side of the outer body 3, that is, on the lower left side in the drawing opposite to the fixed hook 5 through the first rotating 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 . In other words, the second engagement pin P2 is fixed by being fixed at the fixed position rotated in the direction of arrow A in FIG. 2, and conversely, at the fixed release position rotated in the direction of arrow B in FIG. 3, ) To release it. The quick coupler 1 is referred to as a pull type because the tip of the movable hook 7 is thus pushed toward the center of the outer body 3 and the second engagement pin P2 is fixed. On the other hand, as will be described later, the movable hook 7 is provided with the pushing projections 71 projecting from the push rod pins 36 and the push rods 36 so that the first link 61 of the interlocking linkage 13 can be pressed or released more reliably, They are integrally attached or integrally formed at adjacent positions.

The fixed hook latch 9 is a safety device for securing the safety of the quick coupler 1 and is provided at one side of the fixing hook 5 of the outer body 3, And is pushed or pressed by the movable hook 7 which is fixed or unlocked with respect to the second engagement pin P2, Lock or unlock the pin (P1). 2 and 3, the fixed hook latch 9 has a hook shape as a whole. The rotary hook 41 is projected from the fixed end to which the second rotation pin 33 is coupled, And the return spring 47 is fitted around the periphery of the malearm 41. That is, the fixed hook latch 9 has a rotary arm 41 projecting outward in the radial direction of the second rotary pin 33 at a position adjacent to the second rotary pin 33, Is coupled to one end of the interlocking linkage 13, that is, to the right end of the second link 62 so as to be rotatable. The return spring 47 is a spring means for returning the fixed hook latch 9 to the first engagement pin P1 locking position when the pressing force of the second link 62 for pressing the rotary arm 41 is disappeared, Is connected to one side of the fixed hook latch 9, and is preferably made of a torsion spring which is fitted around the pivot pin 33, as shown in Figs. The upper arm 48 is fixed to the fixed hook latch 9 and the other end, that is, the lower arm 49 shown in the drawing, so that the return spring 47 resiliently resists the rotation of the fixed hook latch 9. [ Is supported by a support plate 27 attached to the outer body 3 or the outer body 3 so that when the pressing force by the interlocking linkage 13 disappears in the compressed state of Figure 2 as in Figure 3, And returns the fixed hook latch 9 to the fixing position of the first engagement pin P1.

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 distal end of the push rod 53 is pivoted to the distal end of the movable hook 7 via the push rod pin 36. The push rod 53 is pivotally connected to the movable hook 3 via the second pivot pin 33, Lt; / RTI > Therefore, 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 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. 3 and is positioned at the fixed release position as shown in Fig.

In particular, the actuating cylinder 11 has a lock spring 55 mounted on itself, i.e. around the push rod 53, as shown in Figures 2 and 3, 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 . 2 and 3, the operating cylinder 11 is interposed between the lock spring 55 and the movable hook 7 via a finishing plate fitted around the second turning pin P2, The contact between the movable hook 55 and the movable hook 7 can be more stably maintained.

On the other hand, the full-type double lock quick coupler 1 is provided with an operation cylinder 11 and a fixed hook latch 9 (see Fig. 2 and Fig. 3) for interlocking the rotation of the movable hook 7 with the fixed hook latch 9 9, an interlocking linkage 13 is provided between the interlocking linkage 13 and the interlocking linkage 13. The interlocking linkage 13 may be formed by a combination of various links, but it is preferable that the interlocking linkage 13 comprises a first link 61 and a second link 62 .

2 to 5, one end, that is, the right end in the drawing is rotatably pinned to the cylinder body 51 of the operating cylinder 11, and the other end, that is, And the left end in the drawing is pin-connected to one end of the second link 62. [ Since the interruption is in the form of a curved convex curved surface so as to be pressed when the movable hook 7 comes into contact with the pressing projection 71 of the movable hook 7, And is thereby pivoted counterclockwise to unlock the fixed hook latch 9. The second link 62 has one end, that is, the left end in the drawing pin-coupled to the other end of the first link 61, and the other end, that is, the right end in the drawing is a fixed hook latch 9, And is locked or unlocked by being depressurized or pushed in conjunction with the rotation of the first link 61. [ At this time, the seating groove 63 is cut at the position where the second link 62 is pin-coupled to the first link 61, and the groove surface of the seating groove 63 is aligned with the end of the second link 62 So that the connection with the second link 62 can be more stably maintained.

3, when the resilient force of the return spring 47 and the resilience of the return hook 47 are transmitted to the movable hook 7, the interlocking linkage 13, And maintains the fixed hook latch 9 in a locked state. 2, the interlocking linkage 13 is configured such that the first link 61 is pressed by the pressing projection 71 and is rotated counterclockwise by the pressing projection 71. When the movable hook 7 is in the first releasing position, Thereby turning the fixed hook latch 9 in the unlocked state via the second link 62. [

4, the fixed hook 5, the movable hook 7, the fixed hook latch 9, and the interlocking linkage 13, which are configured as described above, And may be installed on the inside of the plate 23 so as to be symmetrical forward and backward.

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

In order to attach a work mechanism such as a bucket to the quick coupler 1 of the present invention, first, as shown in Fig. 2, the first engaging pin P1 of the working mechanism is inserted into the fixing hook 5, (P2) is brought into contact with the lock bar (28) adjacent to the movable hook (7).

Then, when the operating cylinder 11 is operated, the push rod 53 is extended to the left in the drawing, and the movable hook 7 is rotated in the direction of the arrow A. As a result, the hook portion of the lower end of the movable hook 7 gradually approaches the first engagement pin P1, and finally the first engagement pin P1 is fixed between the lock bar 28 as shown in FIG. 3 , So that the second engagement pin P2 reaches the fixed position. As the movable hook 7 rotates in the counterclockwise direction, the urging force of the urging spring 71 against the interlocking linkage 13 is also released, so that the restoring force of the return spring 47 and / The linkage linkage 13 is moved to a no-load state, and the first link 61 rotates in the clockwise direction, and the second link 62 also moves to the left in the figure. Accordingly, the fixed hook latch 9 moves to the locked position of the first engagement pin P1 to double-support the first engagement pin P1 fixed to the fixed hook 5. [

In this way, when the work mechanism is assembled and used by the fixed hook 5, the movable hook 7, and the fixed hook latch 9, for example, when the operation cylinder 11 is broken and the pressing force against the movable hook 7 The movable hook 7 can still hold the first engagement pin P1 in the fixed position by the repulsive force of the lock spring 55 and thus the first engagement pin P1 can be stably fixed. Naturally, the fixed hook latch 9, which is not influenced by the movable hook 7, can still hold the second engaging pin P2 at the locked position, thereby stably fixing the second engaging pin P2.

5, the lock spring 55 of the actuating cylinder 11 is first contracted to terminate the operation and separate the work mechanism from the quick coupler 1, as shown in Fig. The lock spring 55 is rotated in the direction of the arrow B so that the lock spring pin 55 is pushed by the push rod pin 36 and the movable hook 7 It is compressed by the upper part.

When the pressing projection 71 rotating in synchronism with the movable hook 7 presses the first link 61 of the interlocking linkage 13 after a while, the first link 61 rotates counterclockwise, The second link 62 is moved to the right side. As a result, the fixed hook latch 9 also rotates in the counterclockwise direction against the reaction force of the return spring 47 and finally reaches the first engagement pin release position as shown in FIG.

Finally, when the first engagement pin P1 is pulled out from the fixed hook 5 to be fixed and released from the fixed hook 5, the first and second engagement pins P1 and P2 are separated from the fixed hook 5 and the movable hook 7, Can be easily separated from the quick coupler 1, and the work mechanism can be attached and detached again by repeating the above procedure at a later work.

1: Quick coupler 3: External body
5: fixed hook 7: movable hook
9: Fixed hook latch 11: Operation cylinder
13: interlocking linkage 31, 33: first and second rotating pins
41: Rotating arm 47: Return spring
51: cylinder body 53: push rod
55: lock spring 61, 62: first and second links
63: seat groove 71: pressing projection
P1, P2: first and second engagement pins

Claims (5)

delete delete 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;
And is rotatably mounted on the outer body (3) on the opposite side of the fixed hook (5), and when the first hook (5) is rotated to the fixed position, the second engaging pin (P2) A movable hook (7) for temporarily releasing and releasing the second engagement pin (P2);
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
And the other end is rotatably pivotally coupled to one side of the movable hook 7 so that the lock spring 55 is extended at the fixed position, An actuating cylinder (11) contracted at the releasing position to actuate the movable hook (7) in a fixed or disengaged position; And
And one end thereof is pivotally coupled to the operating cylinder 11 and the other end is pivotally coupled to the fixed hook latch 9 so that the fixed hook latch 9 9 for locking or unlocking the linkage linkage 13,
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 Including,
The interlocking linkage (13)
A first link (61) one end of which is rotatably coupled to a cylinder body (51) of the operating cylinder (11) and in which an interruption is pressed or released by a securing or releasing operation of the movable hook (7); And
And the other end of which is pin-coupled to the other end of the first link (61) so as to unlock or lock the fixed hook latch (9) in accordance with the pressing or unclamping operation of the first link (61) And a second link (62) coupled to the first link (9). The method of claim 3,
The fixed hook latch (9)
A rotary arm 41 protruding from a position adjacent to the second rotary pin 33 and rotatably coupled with the other end of the second link 62; And
And a return spring (47) connected to one side to return the first engagement pin (P1) to the locked position when the pressing of the second link (62) with respect to the rotation arm (41) is released Full-type double lock quick coupler. The method of claim 4,
The return spring 47 is fitted around the pivot pin 33 so that one end is connected to the outer body 3 and the other end is connected to the fixed hook latch 9 9. The full-type double-lock quick coupler of claim 1, wherein the torsion spring is a torsion spring.

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