KR101777739B1 - Quick coupler for excavator having automatic safety device - Google Patents

Abstract

The present invention relates to a quick coupler for heavy equipment with an automatic safety device. The present invention ensures the safety of work by preventing a work tool from being separated from a boom even if a hydraulic cylinder and a link become inoperable, and does not require a worker to do any work for coupling a safety device. The present invention comprises: a body which is connected by first and second fastening pins to the front end of a boom and the front end of a movable link of heavy equipment; a first movable hook which is coupled to the body at the upper side of a first insertion groove formed on one lower end of the body by a hinge; a second movable hook which is coupled to the body at the upper side of a second insertion groove formed on the other lower end of the body by a hinge; a hydraulic cylinder which has a cylinder rod end coupled to a rotation pin at the middle part of the first movable hook by a hinge and the other end coupled to the middle part of a support shaft axially supported between the both side bodies; a link which has one end coupled to one side of the upper end part of the first movable hook by a hinge and the other end coupled to the middle part of the second movable hook by a hinge; and a safety device which maintains the state in which the first movable hook presses the first coupling pin and the second movable hook presses the second coupling pin even if the hydraulic cylinder or the link becomes inoperable by coupling one end to the middle part of the body and coupling the other end to one side of the lower end part of the second movable hook by a hinge.

Description

{QUICK COUPLER FOR EXCAVATOR HAVING AUTOMATIC SAFETY DEVICE}

The present invention relates to a quick coupler for heavy equipment, and more particularly, to a quick coupler for a heavy equipment, and more particularly, to a safety coupler for a hydraulic coupler, Cost quick coupler equipped with an automatic safety device in which a worker does not need to perform a separate operation.

Generally, heavy equipment is a widely used construction equipment such as road construction, water supply and drainage construction, foundation construction work, land construction work, and soil collecting work, etc. At the tip of the boom, suitable equipments such as bucket, breaker, crusher , Shear, and other equipment.

These work tools are used by replacing the ground according to the contents of the work, such as digging the earth, disposing soil from the ground, crushing rocks, etc. The operator selects the work mechanism at the tip of the boom by moving the boom in the driver's seat A quick coupler device has been developed and can be used now.

That is, the operator of the heavy equipment can automatically perform the operation of joining or separating the quick coupler mounted on the tip of the boom bar to equipment such as a bucket or breaker by a method of operating the boom bar operation lever by operating the boom bar operation lever in the driver's seat .

The conventional quick coupler includes a pair of right and left side bodies provided on both sides in a plate shape, an engaging pin provided on the upper front and rear sides of the inside between the two side bodies, a fixed hook provided on a lower side of the body, And the movable hook is operated by a cylinder provided inside the body.

In order to fasten the work mechanism to the quick coupler, the fastening hook of the quick coupler is engaged with one of the fastening pins of the equipment, and then the fastening is rotated so that the movable hook and the other fastening pin are brought into contact with each other , The cylinder is operated to insert the fixing pin into the movable hook. The combination of the quick coupler and the work mechanism is completed through this series of processes.

When the movable hook and the fixing pin are completely separated from each other, the movable hook is moved to the fixed hook and the fixed hook, It is possible to completely separate the other fixing pins.

The quick coupler, in which the fixed hook and the movable hook are used as described above, saves a lot of time for installing or replacing the work tool on the end of the heavy equipment bar, and thus the work can be performed more quickly.

However, when such a quick coupler is used, a heavy work machine sometimes is separated from the bar. This is the case when an abnormality occurs in the cylinder used to operate the movable hook of the quick coupler. In the case where the cylinder is broken due to an abnormality in the cylinder, the movable hook is operated and the movable pin and the movable hook are separated to be.

When such an accident occurs, the work tool is separated from the arm and falls down to the ground. At this time, if there is a worker around the heavy equipment bar, there is a risk of serious injury to the worker.

Of course, in consideration of such a situation, the quick coupler may be provided with a safety device pin for fixing one side of the movable hook to the body so that the movable hook can not be rotated. In order to fasten the movable hook to the body, Therefore, even if another work mechanism is to be replaced, the operator must directly remove the safety pin, which is inconvenient and requires a long time for the work.

Citation 1: Korean Patent Application No. 10-2009-0118331

An object of the present invention is to prevent a risk of a safety accident due to a falling of a work mechanism due to a loosening of a fastening pin even if the cylinder or the link becomes inoperable state.

It is another object of the present invention to enable a safety device to be easily operated without an operator getting off the driver's seat in order to operate the safety device.

In order to achieve the above-mentioned object, the present invention provides a cabinet comprising: a body connected to a front end of a boom rope of a heavy equipment and a front end of a movable link by first and second fastening pins; A first movable hook hinged to an upper body of a first insertion groove formed at a lower end of the body; A second movable hook hinged to an upper side body of a second insertion groove formed at the other lower end of the body; A hydraulic cylinder in which one end of the cylinder rod is hinged to an intermediate portion of a pivot pin supported between the body and the body and an end of the cylinder rod is hinged to an intermediate portion of the second movable hook; A link hinged at one end to one side of the upper end of the first movable hook and hinged to the middle of the second movable hook at the other end; And one end of the first movable hook is fixedly coupled to the middle portion of the body and the other end is hinged to one side of the lower end of the second movable hook so that even if the hydraulic cylinder or the link becomes inoperative, And an automatic safety device that presses the fastening pin and keeps the second movable hook pressed by the second fastening pin.

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According to an embodiment of the present invention, the safety plate is formed by being drawn out so as to support a bucket pin of a work mechanism inserted into the second insertion groove and fastened by the second movable hook, and a bucket pin As shown in FIG.

The present invention is advantageous in that even if the cylinder or the link becomes inoperable, the fastening pin is not unlocked by the safety device, and the work mechanism is prevented from falling, thereby causing no safety accident.

In addition, the present invention is advantageous in that the safety device can be operated simply by operating the cylinder for operating the movable hook, even if the operator does not fall down from the driver's seat to operate the safety device.

Specific structural and functional descriptions of the embodiments of the present invention disclosed herein are for illustrative purposes only and are not to be construed as limitations of the scope of the present invention. And should not be construed as limited to the embodiments set forth herein or in the application.

The embodiments according to the present invention can make various changes and have various forms, so that specific embodiments are illustrated in the drawings and described in detail in this specification or application. It is to be understood, however, that it is not intended to limit the embodiments according to the concepts of the present invention to the particular forms of disclosure, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, . On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between. Other expressions that describe the relationship between components, such as "between" and "between" or "neighboring to" and "directly adjacent to" should be interpreted as well.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In this specification, the terms "comprises ", or" having ", or the like, specify that there is a stated feature, number, step, operation, , Steps, operations, components, parts, or combinations thereof, as a matter of principle.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as ideal or overly formal in the sense of the art unless explicitly defined herein Do not.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail with reference to the preferred embodiments of the present invention with reference to the accompanying drawings. Like reference symbols in the drawings denote like elements.

The quick coupler 100 according to an embodiment of the present invention includes left and right bodies 110 and a body 110 has a first movable hook 120 and a second movable hook 130 and a hydraulic cylinder 140 The first movable hook 120 and the second movable hook 130 are connected to the first coupling pin 10 even when the hydraulic cylinder 140 and the link 150 are inoperative, And an automatic safety device 200 for holding the second fastening pins 20 in a fastened state.

Here, the body 110 is connected and assembled in a suspended state by front and rear fastening pins passing through the boom rods of the heavy equipment and the front ends of the movable links.

The first movable hook 120 is coupled to the hinge 121 so as to freely rotate on the upper body 110 of the first insertion groove 112 formed at the lower end of the body 110. [

The hinge 131 is coupled to an upper end of the second movable hook 130 so as to freely rotate on the upper body 110 of the second insertion groove 114 formed at the other lower end of the body 110.

The hydraulic cylinder 140 is hinged at one end to a middle portion of a pivot pin 141 supported between the two bodies 110. The end of the cylinder rod 142 is connected to the middle portion of the second movable hook 130, And is hinged to the hinge portion 143.

One end of the link 150 is coupled to the hinge 151 on one side of the upper end of the first movable hook 120 and the other end is coupled to the hinge 152 on the middle portion of the second movable hook 130.

Here, the automatic safety device 200 is fixedly coupled to the middle portion of the body 110, and the other end is hinged to one side of the lower end of the second movable hook 130. And may include an actuating block 210, a safety elastomer 220, an auxiliary link 230, and a safety plate 240.

Here, the operation block 210 is fixedly coupled to one side of the body 110, and is provided with a predetermined operation space 211 therein so as to communicate with one side of the outside.

Here, the safety elastic body 220 has a predetermined compressive force and is inserted and coupled to the internal working space 211 of the operation block 210.

One end of the auxiliary link 230 is coupled to the lower end of the second movable hook 130 and a hinge 231 is coupled to the other end of the auxiliary link 230,

The safety plate 240 is hinged to one end of the actuating pin 241 fitted to the actuating auxiliary groove 232 of the auxiliary link 230 and the other end is hinged to the inner working space 211 of the actuating block 210, And the end of the safety elastic body 220 is inserted and coupled.

In this case, it is preferable that the safety plate 240 is drawn out in a long bar shape, and in particular, the end is curved so as to support the bucket pin of the working mechanism integrally with the second movable hook 130 desirable.

Hereinafter, the operation of the quick coupler according to one embodiment of the present invention will be described.

The quick coupler 100 according to the present invention is configured such that the first fastening pin 10 of the working mechanism is inserted into the first movable hook 120 side and the first insertion groove 112 and inserted into the first fastening pin 20, Is inserted into the second insertion hole (114) on the side of the second movable hook (130) and is tightly fastened.

When the hydraulic cylinder 140 is operated to pull out the cylinder rod 142, the second movable hook 130 is operated and the link 150 is pulled. By pulling the link 150, The automatic safety device 200 is operated sequentially as the hook 120 rotates.

Specifically, when the cylinder rod 142 of the hydraulic cylinder 140 is pulled out, the second movable hook 130 rotates about the hinge 131, So as not to be drawn out from the opening 114. As the second movable hook 130 rotates and the link 150 is pulled at the same time, the first movable hook 120 rotates about the hinge 121 as well. Therefore, the first movable hook 120 also serves to block the inlet of the first insertion groove 112 so that the first coupling pin 10 is not drawn out.

The second movable hook 130 simultaneously rotates the hinge 131 to pull the auxiliary link 230 of the automatic safety device 200 at the same time. The safety plate 240 is pulled at the same time the auxiliary link 230 is pulled and the safety elastic body 220 pressed by the safety plate 240 is compressed. At this time, the second movable hook 130 is rotated and the safety plate 240 is linearly moved. When the auxiliary link 230 coupled between the second movable hook 130 and the safety plate 240 is rotated It helps to make movement between motion and rectilinear motion smooth. The operation pin 241 connected to the safety plate 240 moves in the elongated auxiliary operation groove 232 formed in the auxiliary link 230 and the rotation of the second movable hook 130 and the rotation of the safety plate 240 So that linear motion is not interfered with each other.

The fastening pins 10 and the second insertion grooves 114 of the work mechanism inserted into the first insertion grooves 112 by the first movable hook 120 and the second movable hook 130 of the quick coupler 100 The fastening pin 20 inserted in the fastening hole 20 is firmly fastened to allow the work to be performed.

When the hydraulic cylinder 140 provided in the quick coupler 100 of the present invention is in an inoperable state, since the second movable hook 130 can not be pressed, There is a possibility that the pin 20 is unseated. In addition, when the link 150 is in an inoperative state, there is a possibility that the first fastening pin 10 can not be pulled out from the first insertion groove 112 because the first movable hook 120 can not be pulled. Therefore, when any one of the first fastening pin 10 and the second fastening pin 20 comes off the first insertion groove 112 and the second insertion groove 114, .

However, in the present invention, even if the hydraulic cylinder 140 is disabled, the safety plate 240 is pushed by the elastic pressure of the safety elastic body 230 of the automatic safety device 200, The hook 130 presses the second fastening pin 20 so as to maintain the fastened state so that the second fastening pin 20 is disengaged from the second insertion recess 114 and is prevented from falling out.

Particularly, since the end of the safety plate 240 of the automatic safety device 200 is curved so as to press the second fastening pin 20 together with the second movable hook 130, There is no worry about sea tide and safety can be achieved.

Also, as the second movable hook 130 is maintained in the rotated state, the first movable hook 120 also presses the first coupling pin 10 to maintain the locked state so that the first coupling pin 10 So that there is no fear that the first insertion groove 112 will be disengaged.

As described above, according to the present invention, when the hydraulic cylinder 140 or the link 150 is disabled, the second movable hook 130 or the first movable hook 120 can not be operated even if the operation state of the hydraulic cylinder 140 or the link 150 is disabled, So that there is no possibility that a safety accident will occur due to the drop of the work mechanism.

100: Quick coupler 110: Body
120: first movable hook 130: second movable hook
140: Hydraulic cylinder 150: Link
200: Automatic safety device 210: Operation block
211: operating space 220: safety elastomer
230: auxiliary link 232: operation auxiliary groove
240: Safety plate

Claims (3)

A body connected to the boom bar tip of the heavy equipment and the movable link tip by the first and second fastening pins;
A first movable hook hinged to an upper body of a first insertion groove formed at a lower end of the body;
A second movable hook hinged to an upper side body of a second insertion groove formed at the other lower end of the body;
A hydraulic cylinder in which one end of the cylinder rod is hinged to an intermediate portion of a pivot pin supported between the body and the body and an end of the cylinder rod is hinged to an intermediate portion of the second movable hook;
A link hinged at one end to one side of the upper end of the first movable hook and hinged to the middle of the second movable hook at the other end; And
The first movable hook is hinged to one side of the lower end of the second movable hook so that the first movable hook is engaged with the first fixed hook of the body when the hydraulic cylinder or the link becomes inoperative, And an automatic safety device that presses the pin and keeps the second movable hook pressed by the second lock pin,
The automatic safety device includes:
An operating block fixed to one side of the body and having an operating space inside to communicate with one side;
A safety elastomer inserted into the operating space of the operating block;
An auxiliary link having a first end hinged to a lower end of the second movable hook and an elongated working auxiliary groove formed at the other end; And
And a safety plate hinged to one end of the auxiliary link by an operation auxiliary groove and an operation pin of the auxiliary link and the other end of the safety plate being inserted into the operation space of the operation block by being inserted into the safety elastic body. Quick coupler with heavy equipment for heavy duty.
The safety plate according to claim 1,
And a bucket pin inserted into the second insertion groove and extended by the second movable hook to support a bucket pin of the working mechanism, Quick Coupler for heavy equipment. delete

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