KR102037474B1 - Quick Coupler having safety device - Google Patents

Abstract

The present invention relates to a quick coupler having an auxiliary safety device, which comprises: a body in which a fixing hook is integrally provided in one end. And a moving hook is rotationally installed in the other end; a pair of fixing pins individually engaged with the moving hook and the fixing hook; a driving unit installed in the body to rotate the moving hook for any one of the fixing pins to be engaged with or released from the moving hook; and an auxiliary safety device controlling the other fixing pin arranged in the fixing hook not to be left by moving in a longitudinal direction by a contact and pressurization force on a rear surface of the moving hook when the moving hook rotates to be released from the fixing pin along a rotation direction of the body.

Description

Quick Coupler having safety device

The present invention relates to a quick coupler, and more particularly, is installed on the arm of the excavator can be quickly connected or disconnected a variety of work tools, the cylinder that restrains the work tools due to malfunctions occurring during operation lost their function Even if the present invention relates to a quick coupler with an auxiliary safety device that can prevent the separation of the work tool from the quick coupler.

In general, heavy machinery for construction, such as excavators, using work tools such as breakers, buckets, crushers, etc. to dig the ground, to process the excavated soil or to crush the rock, etc. Work tools are used interchangeably depending on the content of the work.

Conventionally, a device for coupling a working mechanism, the coupler is coupled to a pair of fixed pins on the tip of the female arm of the excavator, the coupling hook is provided on one side and the movable hook is rotatably coupled to the other side, the movable hook is a coupler And is rotated by the operation of the cylinder mounted therein.

Then, the fixed hook and the movable hook is inserted into a pair of fixing pins formed on the upper side of the working mechanism to be combined.

Therefore, the coupler coupled to the tip of the arm is close to the upper side of the work tool and the second fixing pin is inserted into the fixed hook, and the first fixing pin is coupled to the movable hook on the other side. Opening and closing is the first fixing pin is coupled to the inside.

However, such a conventional technique is achieved by a cylinder operated by hydraulic pressure as a means for operating the movable hook, which has the convenience of coupling or detaching a work tool from the driver's seat, but the hydraulic pressure is applied to the cylinder inside the coupler. The need for a hydraulic line for supply has caused problems such as complicated apparatus and increased cost.

Accordingly, in order to solve the above problems, a quick coupler for excavators has been developed. The movable hook of the quick coupler for excavators according to the prior art includes a hinge portion coupled to a hinge pin coupled to a support plate installed at intervals. A safety pin is inserted into the rear side of the hook, and the locking bolt is detachably fastened through the locking plate to the boss coupled to the front side of the movable hook on the front side.

However, the conventional quick coupler for excavators is provided with a safety pin and a locking bolt to maintain the coupling state of the movable hook, so the coupling structure of the safety pin and the locking bolt is complicated, thereby reducing the time and cost required for the manufacture of the quick coupler. There was a problem that was difficult to do, and since it was possible to replace the work tool after releasing the safety pin and the locking bolt, there was a problem that it was difficult to reduce the time required for the work tool replacement. have.

Korea Patent Publication No. 10-2009-0118331 (2009.11.18.) Korea Patent Registration No. 10-1825724 (2018.01.30.)

The present invention has been made in view of the above requirements, the technical problem to be solved by the present invention, is installed on the arm of the excavator can be quickly connected or disconnected various work tools, due to a malfunction generated during operation It is to provide a quick coupler with an auxiliary safety device that can prevent the work tool from being separated from the quick coupler even if hydraulic pressure is lost from the cylinder restraining the work tool.

In particular, the technical problem to be solved by the present invention, even if the hydraulic pin is lost from the cylinder restraining the work tool due to a malfunction occurring during the operation, or even if the safety pin to prevent this failure due to failure of the quick coupler It is to provide a quick coupler with an auxiliary safety device to prevent the tool from being separated from the work tool.

The objects of the present invention are not limited to the above-mentioned objects, and other objects that are not mentioned will be clearly understood by those skilled in the art from the following description.

Quick coupler having an auxiliary safety device according to an embodiment of the present invention for solving the above problems, the fixed hook is provided at one end integrally, the other end is rotatably installed a movable hook; A pair of fixing pins respectively engaged with the movable hook and the fixed hook; A driving unit installed in the main body to rotate the movable hook and to engage or release any one of the fixed pins of the pair of fixing pins to the movable hook; And when the movable hook is rotated according to the rotation direction of the main body to release the latch on any one of the fixing pins, the movable hook is moved in the longitudinal direction by close contact and pressing force by the rear surface of the movable hook and disposed on the fixed hook. It can be made of a configuration including an auxiliary safety device for intervening to prevent the separation of the other fixed pin.

Here, the auxiliary safety device is arranged in a direction parallel to the drive unit, the end portion of the rod portion of a predetermined length to be in close contact with the back surface of the movable hook, the pressure in accordance with the rotation of the movable hook, the rod portion and the screw A gripping hook having a predetermined length varying in length as it is fastened, a gripping hook coupled by an end and a first hinge of the screw and rotating according to a longitudinal movement of the rod and the screw, and a side of the fixing hook It is formed integrally with the main body, disposed to surround the gripping hook on both sides, it may be a configuration including a guide bracket coupled to the gripping hook by a second hinge.

At this time, the front end side of the rod part is supported by a first bracket fixed to the main body, the rod part is supported to be movable in the longitudinal direction through the first bracket, the rear end side of the rod part relative to the main body Supported by a fixed second bracket, the rod portion may be supported to be movable in the longitudinal direction through the second bracket.

In addition, the rod and the fixed pressure bracket is formed between the first bracket and the second bracket, an elastic member surrounding the rod portion may be disposed between the pressure bracket and the second bracket.

In addition, a shield plate may be formed at an end of the rod part to prevent abrasion due to friction when contacting and pressing the back surface of the movable hook.

Other specific details of the invention are included in the detailed description and drawings.

According to the quick coupler with auxiliary safety device according to an embodiment of the present invention, it is installed on the arm of the excavator can quickly connect or disconnect various work tools, from the cylinder to restrain the work tools due to malfunctions generated during operation Even if the hydraulic pressure is lost, the effect of being able to prevent the work tool from being separated from the quick coupler can be provided.

In particular, according to the quick coupler with an auxiliary safety device according to an embodiment of the present invention, the safety pin to prevent or prevent the hydraulic pin from failing from the cylinder restraining the work tool due to a malfunction occurring during the operation is broken down to function Even if it can not be exercised to prevent the separation of the work tool from the quick coupler can be provided an effect that can eliminate the concern of safety accidents.

The effects according to the present invention are not limited by the contents exemplified above, and more various effects are included in the present specification.

1 is a perspective view of a quick coupler having an auxiliary safety device according to an embodiment of the present invention.
2 is a plan view of FIG.
3 is a schematic side view of a state in which a driving unit is installed in FIGS. 1 and 2;
4 is a schematic side view of a state in which the safety pin is installed in FIGS.
FIG. 5 is a partially separated perspective view of the auxiliary safety device of FIG. 1. FIG.
6a to 6c are partial cross-sectional views sequentially showing an operation relationship of the auxiliary safety device according to the rotation of the movable hook in the quick coupler having an auxiliary safety device according to an embodiment of the present invention.

Advantages and features of the present invention, and methods for achieving them will be apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various forms, and only the embodiments of the present invention make the disclosure of the present invention complete and the general knowledge in the technical field to which the present invention belongs. It is provided to fully convey the scope of the invention to those skilled in the art, and the present invention is defined only by the scope of the claims. Like reference numerals refer to like elements throughout.

Thus, in some embodiments, well known process steps, well known structures and well known techniques are not described in detail in order to avoid obscuring the present invention.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. In this specification, the singular also includes the plural unless specifically stated otherwise in the phrase. As used herein, including and / or comprising means not to exclude the presence or addition of one or more other components, steps, and / or actions other than the components, steps, and / or actions mentioned. Used as. And “and / or” includes each and all combinations of one or more of the items mentioned.

In addition, embodiments described herein will be described with reference to perspective, cross-sectional, side and / or schematic views, which are ideal illustrative views of the present invention. Accordingly, shapes of the exemplary views may be modified by manufacturing techniques and / or tolerances. Therefore, the exemplary embodiments of the present invention are not limited to the specific forms shown, but include changes in forms generated according to manufacturing processes. In addition, each component in the drawings shown in the embodiment of the present invention may be shown to be somewhat enlarged or reduced in consideration of the convenience of description.

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

1 is a perspective view of a quick coupler having an auxiliary safety device according to an embodiment of the present invention, FIG. 2 is a plan view of FIG. 1, and FIG. 3 is a schematic side view of a driving unit installed in FIGS. 1 and 2.

3 is a schematic side view of the safety pin installed in Figures 1 and 2, Figure 4 is a partially separated perspective view of the auxiliary safety device in Figure 1, Figures 6a to 6c according to an embodiment of the present invention In a quick coupler having an auxiliary safety device, it is a partial cross-sectional view sequentially showing the operation relationship of the auxiliary safety device according to the rotation of the movable hook.

1 to 6, the quick coupler 100 having an auxiliary safety device 200 according to an embodiment of the present invention, which is installed on the arm of the excavator, the fixed hook 130 is integrated at one end It is provided with, and the other end is rotatably mounted to the main body 110 and the movable hook 120 is installed, the main body 110 is coupled to the fixing pin of the attachment to the arm as the movable hook 120 rotates The driving unit 140 includes a safety pin 150 that supports the rear surface of the movable hook 120 in accordance with the rotational direction of the main body 110 to maintain the engagement state of the movable hook 120 and the fixing pin of the attachment. Can be made.

In addition, the quick coupler 100 having the auxiliary safety device 200 according to the embodiment of the present invention, when the driving unit 140 and the safety pin 150 does not function properly, the back of the movable hook 120 It may be made of a configuration further comprising an auxiliary safety device 200 for maintaining the engagement state of the other fixing pin installed on the fixed hook 130 by the pressing force in close contact with the.

For reference, the fixing pin coupled to the movable hook 120 may be referred to as a first fixing pin 122, and the fixing pin coupled to the fixing hook 130 may be referred to as a second fixing pin 132. Note that the first fixing pin 122 and the second fixing pin 132 are formed in a pair connected with one attachment.

2 to 4, the safety pin 150 is coupled to the hinge 152 with respect to one side of the main body 110, the rotation block 154 is rotated by a predetermined angle, and the rotation block ( The support 156 extending to one side of the 154 and the power supply unit 158 of the weight extending to the other side of the rotary block 154 may be made of a configuration.

Here, the support 156 and the power supply 158 may form an approximately 90 degree angle.

Therefore, in the state where the quick coupler 100 is horizontally positioned or the quick coupler 100 is lifted up the upper side of the arm, the safety pin 150 rotates from the hinge to the starting point by the weight of the power supply unit 158. 156 is rotated upwards so that the end of the support 156 is in close contact with the rear surface of the movable hook 120, thereby preventing the movable hook 120 from rotating backward.

In addition, since the movable hook 120 is rotated outward from the inside of the main body 110 to engage the first fixing pin 122 of the attachment, the operator adjusts the position of the arm rod while the movable hook ( When the outer end of the main body 110 is tilted close to the ground so that the 120 is positioned at the lowest, the power supply unit 158 having a weight greater than that of the support 156 is disposed perpendicular to the ground, and the support hook 156 is movable hooked. It rotates inward of the 120.

As such, the support 156 is rotated to the inside of the main body 110 at the rear side of the movable hook 120 by the operation according to the weight of the power supply unit 158, the movable hook 120 and the support 156 is The restraint force acting on the movable hook 120 is released while being spaced apart from each other.

Subsequently, when the rod is inserted into the cylinder constituting the driving unit 140 by the operator's operation, the movable hook 120 is rotated in the reverse direction to switch the attachment from the quick coupler 100.

Therefore, when the rod is inserted into the cylinder constituting the drive unit 140, the movable hook 120 is rotated to the inside of the main body 110, the locking, coupling of the first fixing pin 122 and the movable hook 120 of the attachment is This releases the attachment and allows replacement of the attachment.

On the contrary, if the outer end of the main body 110 is tilted to the ground side by adjusting the position of the arm, the power supply unit 158 is maintained in the vertical direction by weight. The support 156 is inserted into the main body 110 so as to be spaced apart from the rear surface of the movable hook 120 to release the restraint of the movable hook 120.

Therefore, even if the operation of raising or lowering the arm is repeated, the support 156 maintains the engaged state for pressing the back surface of the movable hook 120 in the direction of the first fixing pin 122, so that hydraulic pressure is lost from the driving unit 140. Even if a malfunction occurs, the engagement and release of the movable hook 120 and the first fixing pin 122 are released, thereby preventing the attachment from being separated from the armband.

Referring to the operation of the safety pin 150 once again as follows.

First, when the attachment is coupled to the quick coupler 100, when the main body 110 is inclined so that the movable hook 120 faces the ground, the support unit 156 is disposed vertically to the ground while the power supply unit 158 is disposed perpendicular to the ground. ) Is inserted into the main body 110 to release the coupling state between the movable hook 120 and the support 156.

Subsequently, when the rod is inserted into the cylinder by the operator's operation, the movable hook 120 is rotated to the inside of the main body 110 to achieve a release state, and the fixed hook 130 is disposed adjacent to the attachment to load the rod from the cylinder. Protruding to the engaging hook 120 and the first fixing pin 122 is engaged, coupled to the attachment and the quick coupler 100 is made.

Thereafter, when the quick coupler 100 is raised in the horizontal direction, the power supply unit 158 is disposed in the vertical direction to the ground, and the support 156 is in close contact with the rear surface of the movable hook 120 so that the movable hook 120 is removed. 1 can be prevented from being separated from the fixing pin 122.

The configuration and operation relationship of the safety pin 150 that can be made in such a configuration is disclosed in Korean Patent No. 10-1825724 registered and filed by the applicant of the present invention, more detailed description will be omitted.

On the other hand, the quick coupler 100 according to an embodiment of the present invention, as mentioned above, may be made of a configuration that further includes the safety pin 150 and the auxiliary safety device 200.

That is, when the driving unit 140 and the safety pin 150 are broken or damaged and fail to perform their functions, the movable hook 120 must be engaged and engaged with the first fixing pin 122 of the attachment. As the movable hook 120 is freely rotated, as the first fixing pin is separated from the movable hook 120, the attachment may be separated from the arm, causing a safety accident.

Therefore, in the case of the quick coupler 100 according to the embodiment of the present invention, even if the driving unit 140 and the safety pin 150, which are constituted as a cylinder, are broken or damaged, the attachment of the attachment is changed according to the inclination of the quick coupler 100. The first fixing pin 122 and the second fixing pin 132 will further include an auxiliary safety device 200 to prevent the separation from the movable hook 120 and the fixed hook 130.

The auxiliary safety device 200 is arranged in a direction parallel to the driving unit 140, the end portion of the rod portion of a predetermined length that is in close contact with the back of the movable hook 120, the pressure is made in accordance with the rotation of the movable hook 120 ( 210, a screw portion 220 whose length is variable as the screw portion is screwed into the rod portion 210, the rod portion 210 and the end of the screw portion 220 and the first hinge 252 is coupled The gripping hook 250 rotates from the second hinge 262 described later according to the longitudinal movement of the screw unit 220, and the gripping hook 250 is disposed on one side of the fixing hook 130 of the main body 110. Is disposed to wrap in, it may be made of a configuration including a guide bracket 260 coupled to the gripping hook 250 by a second hinge 262.

Here, a shield plate 212 may be formed at the end of the rod portion 210 to prevent contact with the rear surface of the movable hook 120 and abrasion due to friction during pressing.

Therefore, the screw portion 220 is adjusted to the length of the rod portion 210 while the screw fastening is made, it is possible to adjust the contact position between the end of the rod portion 210 and the rear surface of the movable hook 120.

Here, the front end side of the rod 210 is supported by the first bracket 112 extending from the driving unit 140, but is supported to be movable in the longitudinal direction through the first bracket 112, the rear end side is the main body ( It is supported by the second bracket 114 extending from the 110, it can be supported to be movable in the longitudinal direction through the second bracket (114).

For reference, although the first bracket 112 extends from the driving unit 140 and the second bracket 114 extends from the main body 110 as an example, this is one embodiment for better understanding of the present invention. As just this, if the first bracket 112 and the second bracket 114 can perform a function of guiding and supporting the longitudinal movement of the rod 210 in a fixed state, the positional relationship may be different. .

In addition, between the first bracket 112 and the second bracket 114, a pressing bracket 230 is fixedly coupled to the rod 210 is formed, the pressing bracket 230 and the second bracket 114 Between the elastic member 240 may be a coil spring is provided.

Therefore, while the movable hook 120 is rotated and the rear surface of the movable hook 120 is in close contact with the front end of the rod 210, the force of the rear surface of the movable hook 120 to press the rod 210 is the elastic member 240. If it is smaller than the elastic force of, as shown in Figure 6b, the movable hook 120 is limited by the rotation, the separation of the first fixing pin 122 of the attachment is not made.

On the other hand, the movable hook 120 is rotated at a larger inclination so that the rear surface is in close contact with the shield plate 212 formed at the end of the rod 210, the rear surface of the movable hook 120 is the rod portion ( When the force for pressing 210 is greater than the elastic force of the elastic member 240, as shown in FIG. 6C, the rod part 210 moves in the length direction toward the fixed hook 130 while compressing the elastic member 240. The bar 220 is also moved in the longitudinal direction in conjunction with the screw unit 220, accordingly, the grip hook 250 coupled by the front end of the screw unit 220 and the first hinge 252 and the guide bracket 260 By rotating the combined second hinge 262 as a starting point, the front end of the gripping hook 250 blocks the second fixing pin 132 of the attachment disposed on the fixing hook 130.

Accordingly, the second fixing pin 132 is held and coupled to the fixing hook 130, so that the first fixing pin 122 paired with the second fixing pin 132 is also opened. Departure from the movable hook 120 is prevented.

For reference, in the case of the quick coupler 100 having the auxiliary safety device 200 according to an embodiment of the present invention, the auxiliary safety device 200 is provided with the safety pin 150 as an example. Of course, only the auxiliary safety device 200 may be provided in the quick coupler 100 from which the configuration of the 150 is excluded.

Those skilled in the art will appreciate that the present invention can be embodied in other specific forms without changing the technical spirit or essential features of the present invention. Therefore, it should be understood that the embodiments described above are exemplary in all respects and not restrictive. The scope of the present invention is shown by the following claims rather than the above description, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included in the scope of the present invention. do.

100: quick coupler 110: main body
112: first bracket 114: second bracket
120: movable hook 122: first fixing pin
130: fixing hook 132: second fixing pin
140: drive unit 150: safety pin
152: hinge 154: rotation block
156: support 158: power supply unit
200: auxiliary safety device 210: rod
212: shield plate 220: screw portion
230: pressure bracket 240: elastic member
250: grip hook 252: first hinge
260 guide bracket 262 second hinge

Claims (5)

A main body having a fixed hook at one end and a movable hook rotatably installed at the other end; A pair of fixing pins respectively engaged with the movable hook and the fixed hook; A driving unit installed in the main body to rotate the movable hook and to engage or release any one of the fixed pins of the pair of fixing pins to the movable hook; And when the movable hook is rotated according to the rotational direction of the main body to release the latch on the one of the fixing pins, the movable hook is moved in the longitudinal direction by the close contact and the pressing force by the rear surface of the movable hook and disposed on the fixed hook. Including an auxiliary safety device to prevent the separation of the other one fixed pin,
The auxiliary safety device,
It is arranged in a direction parallel to the drive unit, the end portion of the rod portion of a predetermined length to be in close contact with the back surface of the movable hook, the pressure according to the rotation of the movable hook, the length is variable as the screwed with the rod portion Is formed integrally with the main body on one side of the fixing hook, the gripping hook coupled by the end of the screw portion and the first hinge is rotated in accordance with the longitudinal movement of the rod portion and the screw portion, A guide bracket disposed on both sides of the gripping hook and coupled with the gripping hook by a second hinge,
The front end side of the rod portion is supported by a first bracket fixed to the main body, the rod portion is supported to be movable in the longitudinal direction through the first bracket,
The rear end side of the rod portion is supported by a second bracket fixed to the main body, the rod portion is a quick coupler with an auxiliary safety device, characterized in that the support is movably supported in the longitudinal direction through the second bracket.
delete delete The method of claim 1,
Between the first bracket and the second bracket is formed a pressure bracket fixed to the rod,
Quick coupler with an auxiliary safety device, characterized in that the elastic member surrounding the rod portion is disposed between the pressing bracket and the second bracket.
The method of claim 1,
At the end of the rod portion is a quick coupler with an auxiliary safety device, characterized in that the shield plate is formed to prevent abrasion due to friction when in close contact with the back of the movable hook, the pressure.

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