KR20210127331A - Cover opening/closing apparatus of oil-hydraulic coupling block for quick change device - Google Patents

Abstract

The present invention relates to a cover opening and closing device for a quick change hydraulic coupling block with a structure improved to interlock the opening and closing operation of a cover member according to the movement of a hydraulic coupling block by improving the structure of the cover member that opens and closes a connection hole of a horizontal type hydraulic coupling device, to achieve easy opening and closing operation of the cover member while minimizing design changes as the structure is improved to open and close the cover member due to the interference of a locking projection on a stopper member during the opening and closing operation of the cover member, and as the cover member is closed by the restoring force of the return spring, and accordingly, to reduce operating noise.

Description

COVER OPENING/CLOSING APPARATUS OF OIL-HYDRAULIC COUPLING BLOCK FOR QUICK CHANGE DEVICE}

The present invention relates to a cover opening and closing device for a quick change hydraulic coupling block, and in particular, by improving the structure of the cover member for opening and closing the connection hole of the horizontal type hydraulic coupling device, the opening and closing operation of the cover member according to the movement of the hydraulic coupling block In addition to this, the structure of the cover member is opened and closed by the interference of the locking projection on the stopper member during the opening and closing operation of the cover member and the cover member is closed by the restoring force of the return spring, thereby minimizing design changes. It relates to a cover opening and closing device for a quick change hydraulic coupling block whose structure is improved so that the opening and closing operation can be made easily and thus the operation noise can be reduced.

In general, heavy construction and civil engineering equipment such as excavators use work tools such as breaker, bucket, crusher, etc. It will be replaced and used according to the contents of the work.

In the conventional device for coupling a work tool, a coupler is coupled with a pair of coupling pins to the tip of the arm of an excavator, a fixed hook is provided on one side of the coupler and a movable hook is coupled to the other side to be rotatable, and the movable hook is within the coupler. It is configured to be rotated by the operation of the mounted cylinder.

And the fixing pin formed on the upper side of the work mechanism is inserted into the fixed hook and the movable hook so that the coupling is made.

Therefore, the coupler coupled to the tip of the arm is brought close to the upper side of the work tool, a fixed pin is inserted into the fixed hook, and another fixed pin is coupled to the movable hook of the other side. The fixing pin is coupled.

However, in the prior art, as a means for operating the movable hook, the hydraulic pressure is supplied to the cylinder inside the coupler, although it is convenient to couple or separate the work tool from the driver's seat by using a cylinder operated by the action of hydraulic pressure. As a hydraulic line is required for this purpose, problems such as complexity of the device and increased cost were inherent.

In order to solve the above problems, a quick coupler for an excavator has been developed, and the movable hook of the quick coupler for an excavator according to the prior art includes a hinge part coupled to a hinge pin coupled to a support plate installed at intervals, and on the rear side of the movable hook A safety pin is inserted and installed, and the locking bolt is detachably fastened to the front side by penetrating the locking plate to the boss coupled to the front of the movable hook.

As a prior art related to the existing rotary quick coupler, as disclosed in Korean Patent Registration No. 10-1783958 "rotational quick coupler" (registration date: 2017.09.26), it is installed on the arm of the excavator and the connecting bar and the connecting plate are A main body provided, a power transmission unit installed on the connection plate to convert and transmit the traveling direction of power, a driving unit for providing power to the power transmission unit, and a fixed hook installed in the power transmission unit and coupled to the attachment A rotation block provided with, a movable hook rotatably installed on the rotation shaft of the rotation block, a driving cylinder installed on the rotation block and rotating the movable hook to engage and engage the attachment, the power transmission unit and the rotation block It includes an anti-wear part for preventing the friction, and a buffer part provided on the main body to prevent the gap between the main body and the power transmission unit and the distance between the main body and the rotating block from being spaced apart, the The power transmission unit includes a gear member installed on the connection plate, and a gear shaft geared to the gear member to transmit the power of the driving unit to the gear member.

The wear preventing unit includes a protrusion protruding from the rotating plate and supporting the gear member, and a slip member installed on the protrusion and preventing the protrusion and the gear member from contacting the protrusion and the gear member is slidably supported.

The slip member is made of a ceramic material or synthetic resin material capable of preventing wear due to friction, and is coupled to the upper surface of the protrusion to support the lower surface of the gear member to slip.

However, the existing quick coupler device forms a flow path using a hydraulic coupling block without a hydraulic hose between the quick coupler body and the rotating housing, or between the quick coupler body and the adapter body, and the rotating housing and the adapter body. As a prior art for the prior art, as disclosed in Japanese Patent Application Laid-Open No. 2009-537711 "Quick Exchange Device" (published on October 29, 2009), a quick coupler mounted on the machine tool side, and a lock coupled to the quick coupler and a mechanism A quick change device having an adapter connected to the , and a hydraulic coupling for establishing a hydraulic connection between a hydraulic system in the machine tool and a hydraulic system of the corresponding mechanism, wherein the hydraulic coupling includes a first coupling member and a second couple These two coupling members consisting of a ring member are held together in an operative position and the first coupling member and the second coupling member cooperating with at least a mechanical retaining means formed separately from the locking device of the quick change device. There is a quick changer characterized in that in the quick changer a corresponding coupling member is held in an actuated position by frictional engagement by a corresponding mechanical retaining means.

By the way, in the existing oil quick device, connection holes for forming oil passages corresponding to each other are formed in the hydraulic coupling blocks corresponding to each other.

The hydraulic coupling block in which the connection hole is formed interconnects the quick coupler body and the rotating housing, or the rotating housing and the adapter body, or, when the rotating housing is omitted, hydraulic pressure in the process of directly connecting the quick coupler body and the adapter body A horizontal type and a vertical type of connection means are provided according to the movement method for connecting the coupling blocks.

The horizontal type connecting means is in close contact with or spaced apart from the second coupling member in the form of a hydraulic coupling block in the form of a hydraulic coupling block in a horizontal and vertical movement manner using an actuator such as a cylinder. The vertical type connecting means adopts a method of adhering or separating the second coupling member to the first coupling member of the fixed type in a vertical vertical movement method using an actuator such as a cylinder, and have.

In the case of the existing hydraulic coupling block, since the connection hole is exposed to the outside in a state of being spaced apart from each other, there is a risk that foreign substances such as dust or sand and gravel may enter the connection hole, so a separate cover for opening and closing the connection hole is provided. have.

Although the cover is manually opened and closed by the operator, there is a risk of loss of the cover, and the opening and closing operation is cumbersome.

Hereinafter, in the present invention, a cover opening and closing device for a quick change hydraulic coupling block provided with a horizontal type of connection means will be discussed.

Korean Patent Registration No. 10-1783958 "Rotating Quick Coupler" (Registration Date: 2017.09.26) Japanese Patent Laid-Open Publication No. 2009-537711 "Quick Exchange Device" (published on October 29, 2009)

The present invention was created to solve these problems in consideration of the above-mentioned problems, and its purpose is to improve the structure of the cover member for opening and closing the connection hole of the horizontal type hydraulic coupling device so that the cover member can be moved according to the movement of the hydraulic coupling block. In addition to interlocking the opening/closing operation, the cover member opens and closes due to the interference of the locking projection on the stopper member during the opening/closing operation of the cover member, and the structure is improved to close the cover member by the restoring force of the return spring, minimizing design changes. An object of the present invention is to provide a cover opening and closing device for a quick change hydraulic coupling block whose structure is improved so that the opening and closing operation of the member is made easy and thus the operation noise can be reduced.

The present invention for achieving the above object is a quick coupler body connected to the excavator; a rotating housing disposed below the quick coupler body; an adapter body disposed under the rotating housing and coupled to the attachment; The first movable hydraulic coupling block provided on the upper side of the rotating housing is moved to the left and right horizontal directions with an actuator to the first fixed hydraulic coupling block provided in the quick coupler body to closely adhere or spaced apart to select the oil flow path to selectively supply hydraulic pressure of oil supplied from the hydraulic system of the excavator to the rotating housing, and to a second fixed hydraulic coupling block provided on the lower side of the rotating housing, a second movable hydraulic couple provided in the adapter body Hydraulic coupling means for selectively supplying hydraulic pressure of oil supplied to the rotating housing to the adapter body side by selectively connecting the oil flow path by moving the ring block in the horizontal direction to the left and right with an actuator to make it close or spaced apart; ; a cover member provided on at least one of the first and second movable hydraulic coupling blocks and rotatably provided toward the front and the upper side about the hinge shaft; and a cover opening/closing means for interlocking the opening/closing operation of the cover member when the first and second movable hydraulic coupling blocks are moved.

The cover opening and closing means is provided to be fixed between the first and second fixed hydraulic coupling blocks and the first and second movable hydraulic coupling blocks, and a locking protrusion extending upwardly from one end of the cover member, respectively, and When the first and second movable hydraulic coupling blocks move forward in the left direction, a stopper member that interferes with the locking protrusion to open the cover member, and is wound around the hinge shaft to elastically support the cover member in a direction in which the cover member is closed It is equipped with a restoring spring.

The cover member is further provided with a cushion member for reducing contact noise at one side of the locking protrusion in contact with the stopper member.

Another characteristic element of the present invention includes a quick coupler body connected to the excavator; an adapter body disposed on a lower side of the quick coupler body and to which an attachment is coupled; The second hydraulic connection block provided in the adapter body is moved to the left and right horizontal directions by an actuator to the first hydraulic connection block provided to be fixed to the quick coupler body to closely or spaced apart to selectively connect the oil flow path to the quick Hydraulic coupling means for selectively supplying the hydraulic pressure of the oil supplied to the coupler body to the adapter body side; a cover member provided on the second hydraulic connection block and rotatably provided toward the front and upper sides about the hinge shaft; and a cover opening/closing means for interlocking the opening/closing operation of the cover member when the second hydraulic connection block is moved;

The cover opening and closing means is provided to be fixed between each of the locking protrusion extending upwardly from one end of the cover member, the first hydraulic connection block and the second hydraulic connection block, and the left direction of the second hydraulic connection block. A stopper member for opening the cover member by interfering with the locking protrusion during forward movement, and a restoration spring wound around the hinge shaft to elastically support the cover member in a direction in which the cover member closes.

The present invention covers the inlet of the connection hole of the first and second movable hydraulic coupling blocks so that the opening/closing operation of the cover member to block external foreign substances is operated in conjunction with the forward operation of the first and second movable hydraulic coupling blocks, so that it is normally outside In addition to being able to perform a foreign material blocking function, during the coupling operation, the operator can automatically open the cover member without having to open the cover member, which has a useful effect of improving the convenience of the operator.

The present invention is a useful advantage that the opening and closing operation of the cover member is made by a simple operation in which the locking protrusion and the stopper member interfere during the forward operation of the first and second movable hydraulic coupling blocks, so that maintenance is easy and the manufacturing cost can be reduced has

In addition, as the cushion member is further provided on one side of the locking protrusion according to the present invention, it is possible to reduce the contact impact with the stopper member and reduce the operating noise generated during the opening operation of the cover member.

1 is an external perspective view showing a quick change equipment to which a cover opening and closing device for a quick change hydraulic coupling block according to the present invention is applied.
Figure 2 is a front view schematically showing the exploded state of Figure 1;
Figure 3 is a perspective view showing the present invention cover opening and closing means.
Figure 4 is a front view showing the present invention in a closed state of the cover member.
5A and 5B are diagrams schematically showing the state before and after the locking protrusion of the cover opening and closing means of the present invention is bent by the stopper member.
Figure 6 is a use state diagram sequentially showing the closing operation of the cover member of the present invention.
7 is a view showing a modified example of the present invention cover member.
8 is a block diagram showing another embodiment of the cover opening and closing device for a quick change hydraulic coupling block according to the present invention.

Hereinafter, a cover opening and closing device for a quick change hydraulic coupling block according to the present invention will be described in more detail through the detailed description of the embodiments with reference to the drawings.

In describing the present invention, if it is determined that a detailed description of a related known technology or configuration may unnecessarily obscure the subject matter of the present invention, a detailed description thereof will be omitted. And the terms to be described later are terms defined in consideration of functions in the present invention, and may vary according to the intention or custom of the user. Therefore, the definition should be made based on the content throughout this specification. In addition, 'including' a certain component means that other components may be further included, rather than excluding other components, unless otherwise stated.

An embodiment of the cover opening and closing device for a quick change hydraulic coupling block according to the present invention will be described with reference to FIGS. 1 to 7, and a quick coupler body 100 connected to the excavator; a rotating housing 200 disposed on the lower side of the quick coupler body 100; an adapter body 300 disposed on the lower side of the rotating housing 200 and to which an attachment is coupled; The first movable hydraulic coupling block 420 provided on the upper side of the rotating housing 200 to the first fixed hydraulic coupling block 410 provided in the quick coupler body 100 is moved to the left and right by an actuator 450. The oil flow path is selectively connected by moving in the horizontal direction to closely contact or spaced apart to selectively supply the hydraulic pressure of oil supplied from the hydraulic system of the excavator to the rotating housing 200, and The second movable hydraulic coupling block 440 provided in the adapter body 300 to the second fixed hydraulic coupling block 430 provided on the lower side is moved in the left and right horizontal directions with the actuator 450 to closely adhere or spaced apart. a hydraulic coupling means for selectively connecting the oil flow path to selectively supply hydraulic pressure of oil supplied to the rotating housing 200 to the adapter body 300 side; A cover member 500 provided on at least one of the first and second movable hydraulic coupling blocks 420 and 440 and provided rotatably toward the front and the upper side about the hinge shaft 510 to selectively open and close the connection hole 405 . ); and a cover opening/closing means 600 for interlocking the opening/closing operation of the cover member 500 when the first and second movable hydraulic coupling blocks 420 and 440 are moved.

1 and 2, the quick coupler body 100 is provided with a fixed hook formed on one side and a movable hook operated forward and backward by a cylinder on the other side.

The rotating housing 200 has an outer ring member (not shown) that is coupled to the outside so that the driving motor of the driving unit is accommodated and is interlocked and rotated by the driving rotation force of the driving unit, and the outer ring member is supported inside the outer ring member. An inner ring member (not shown) is provided.

That is, the rotating housing 200 is opened up and down, and the inner ring member and the outer ring member are accommodated therein.

The inner ring member is bolted to the rotating housing 200 .

The first fixed hydraulic coupling block 410 is formed at the lower end of the other side of the quick coupler body 100, and has a structure in which a bent connection hole 405 is formed to supply oil transferred from the excavator therein.

The second fixed hydraulic coupling block 430 is formed at the lower end of the other side of the rotating housing 200, and a connection hole 405 bent to supply oil transferred from the quick coupler body 100 therein. has a formed structure.

The first movable hydraulic coupling block 420 is provided to be movable forward and backward in the left and right directions by an actuator 450 on the upper portion of the rotating housing 200, and the second movable hydraulic coupling block 440 has a structure provided on the upper portion of the adapter body 300 to be movable forward and backward in the left and right directions by the actuator 450 .

3, the cover member 500 is bent downward from the left end of the cover body 502 to which the hinge shaft 510 is axis-coupled, and the first, 2 It is composed of a cover portion 504 that closes the connection holes 405 of the movable hydraulic coupling blocks 420 and 440 to block external foreign substances.

The cover opening and closing means 600 is, as shown in FIGS. 3 and 4, a locking protrusion 610 extending upwardly from one end of the cover member 500, and the first and second fixed hydraulic couplings. It is provided to be fixed between the blocks 410 and 430 and the first and second movable hydraulic coupling blocks 420 and 440, respectively, and when the first and second movable hydraulic coupling blocks 420 and 440 move forward in the left direction, the blocking protrusion 610 and A stopper member 620 that interferes with opening the cover member 500, and a restoration spring wound around the hinge shaft 510 to elastically support the cover member 500 in the closing direction of the cover member 500 ( 630) is provided.

The locking protrusion 610 is formed to extend in a vertical direction from the cover body 502 of the cover member 500 .

The stopper member 620 protrudes in the form of a pin and is provided inside the quick coupler body 100 and inside the rotating housing 200 , respectively.

The restoration spring 630 is wound around the hinge shaft 510 and has a structure in which the end of the locking protrusion 610 interferes to provide an elastic force for returning to the original state after the cover member 500 is opened.

The operation of the cover opening means is, as shown in FIG. 5A, when the first movable hydraulic coupling block 420 is moved forward in the left direction by the actuator 450, the blocking protrusion 610 is It is in contact with the stopper member 620 .

Thereafter, as shown in FIG. 5b , while the locking protrusion 610 interferes with the stopper member 620 protruding from the inside of the quick coupler body, the cover member 500 moves upwards around the hinge shaft 510 . It is rotated in the (clockwise direction), and the connection hole 405 of the first movable hydraulic coupling block 420 is opened.

For this reason, while the first movable hydraulic coupling block 420 and the connection hole 405 of the first fixed hydraulic coupling block 410 are in surface contact to communicate with each other, the hydraulic pressure of the oil supplied from the excavator is transferred through the quick coupler body. A flow path to be delivered to the inside of the rotating housing 200 is formed.

The second movable hydraulic coupling block 440 is also moved forward to the second fixed hydraulic coupling block 430 side in the same manner as the first movable hydraulic coupling block 420 described above in the rotating housing 200. A flow path for supplying oil to the adapter body 300 is formed.

Accordingly, when the quick coupler body and the rotating housing 200 are connected and the rotating housing 200 and the adapter body 300 are connected, the flow path is not connected through a hydraulic hose but between the hydraulic coupling blocks. Since it can be formed, it has the advantage of being able to quickly change the attachment.

Unexplained reference numerals "810" and "820" indicate a tilting cylinder that tilts and rotates the lower part of the rotator housing left and right.

7 is a view showing a modified example of the cover member 500 of the present invention, wherein the cover member 500 is a cushion member for reducing contact noise on one side of the locking protrusion 610 in contact with the stopper member 620 . (555) is further provided.

On the other hand, during the disassembly operation of the quick coupler body and the rotating housing 200 and the disassembly operation of the rotating housing 200 and the adapter body 300, the first and second movable hydraulic coupling blocks 420 and 440 are again While moving backward, the locking protrusions 610 are spaced apart from the stopper member 620 while being spaced apart from the first and second fixed hydraulic coupling blocks 410 and 430 to release the interference state, and the restoring elastic force of the restoring spring 630 . The cover part 504 of the cover member 500 covers the inlet of the connection hole 405 of the first and second movable hydraulic coupling blocks 420 and 440 by do.

Therefore, in the present invention, the opening and closing operation of the cover member 500 to block the external foreign substances by covering the inlet of the connection hole 405 of the first and second movable hydraulic coupling blocks 420 and 440 is the first and second movable hydraulic coupling blocks. By making the operation in conjunction with the forward operation of (420, 440), it is possible to perform the function of blocking external foreign substances in normal times, and it is possible to automatically open the cover member 500 without the need for the operator to open the cover member 500 during the coupling operation. It has a useful effect that can improve the convenience of

In the present invention, the opening and closing operation of the cover member 500 is made by a simple operation in which the locking protrusion 610 and the stopper member 620 interfere with the forward operation of the first and second movable hydraulic coupling blocks 420 and 440, so that the maintenance operation is performed. It is easy to use and has a useful advantage of reducing manufacturing cost.

In addition, as the cushion member 555 is further provided on one side of the locking protrusion 610 of the present invention, the contact impact with the stopper member 620 is reduced and the operation noise generated during the opening operation of the cover member 500 can be reduced. have an advantage

8 is a view showing another embodiment of the cover opening and closing device for a quick change hydraulic coupling block according to the present invention, and a quick coupler body 100 connected to an excavator; an adapter body 300 disposed on the lower side of the quick coupler body 100 and to which an attachment is coupled; By moving the second hydraulic connection block 470 provided in the adapter body 300 to the first hydraulic connection block 460 provided to be fixed to the quick coupler body 100 in the left and right horizontal directions with the actuator 450, Hydraulic coupling means for selectively supplying the hydraulic pressure of the oil supplied to the quick coupler body 100 to the adapter body 300 side by selectively connecting the oil flow path by close contact or spaced apart; a cover member 500 provided on the second hydraulic connection block 470 and rotatably provided toward the front and the upper side about the hinge shaft 510; and a cover opening/closing means 600 for interlocking the opening/closing operation of the cover member 500 when the second hydraulic connection block 470 is moved;

The cover opening and closing means 600 is between the first hydraulic connection block 460 and the second hydraulic connection block 470 and a blocking protrusion 610 extending upwardly from one end of the cover member 500 . A stopper member 620 provided to be fixed to each of the second hydraulic connection blocks 470 and interfering with the locking protrusions 610 to open the cover member 500 when the second hydraulic connection block 470 moves forward in the left direction, and the hinge shaft 510 ) and having a restoring spring 630 for elastically supporting the cover member 500 in a direction in which the cover member 500 is closed.

In another embodiment of the present invention, the rotating housing 200 is omitted, and the quick coupler body 100 and the adapter body 300 are directly connected compared to the previous embodiment, but the first fixed hydraulic coupling of the line embodiment As the second hydraulic connection block 470 of the same structure as the second movable hydraulic coupling block 440 of the embodiment standing on the first hydraulic connection block 460 of the same structure as the block 410 approaches, the stumbling block 610 ) to open the cover member 500 while the stopper member 620 interferes, and the closing operation of the cover member 500 has the same opening/closing operation method in which it is closed by the restoring elastic force of the restoring spring 630 .

Therefore, in another embodiment of the present invention, the hydraulic coupling connection between the quick coupler body 100 and the adapter body 300 is performed in a state where the rotating housing 200 of the above-described embodiment is omitted, the first and second hydraulic coupling blocks. By automatically opening and closing the opening and closing operation of the cover member 500 in connection with the forward and backward operations of the second hydraulic connection block 470 in the process of performing the It shows that it can be applied to change equipment.

As such, although specific embodiments have been described in the detailed description of the present invention, various modifications are possible without departing from the scope of the present invention. Therefore, the scope of the present invention is not limited to the above-described embodiment, but should be defined by the claims and equivalents as well as the claims to be described later.

That is, the present invention described as described above is not limited to the specific preferred embodiments described above, and anyone with ordinary skill in the art to which the invention pertains without departing from the gist of the present invention as claimed in the claims Of course, various modifications are possible, and such modifications are within the scope of the claims.

100: quick coupler body 200: rotator housing
300: adapter body 405: connection hole
410,430: first and second fixed hydraulic coupling blocks
420,440: first and second movable hydraulic coupling block
450: actuator 460: first hydraulic connection block
470: second hydraulic connection block 500: cover member
502: cover body 504: cover part
510: hinge shaft 600: cover opening and closing means
610: locking protrusion 620: stopper member
630: restoration spring 810,820: tilting cylinder

Claims (4)

a quick coupler body 100 connected to the excavator;
a rotating housing 200 disposed on the lower side of the quick coupler body 100;
an adapter body 300 disposed under the rotating housing 200 and coupled to an attachment;
The first movable hydraulic coupling block 420 provided on the upper side of the rotating housing 200 to the first fixed hydraulic coupling block 410 provided in the quick coupler body 100 is moved to the left and right by an actuator 450. The oil flow path is selectively connected by moving in the horizontal direction to closely contact or spaced apart to selectively supply the hydraulic pressure of oil supplied from the hydraulic system of the excavator to the rotating housing 200, and The second movable hydraulic coupling block 440 provided in the adapter body 300 to the second fixed hydraulic coupling block 430 provided on the lower side is moved in the left and right horizontal directions with the actuator 450 to closely adhere or spaced apart. a hydraulic coupling means for selectively connecting the oil flow path to selectively supply the hydraulic pressure of the oil supplied to the rotating housing 200 to the adapter body 300 side;
a cover member 500 provided on at least one of the first and second movable hydraulic coupling blocks 420 and 440 and rotatably provided toward the front and the upper side about the hinge shaft 510; and
Cover opening and closing means (600) for interlocking the opening and closing operation of the cover member (500) when the first and second movable hydraulic coupling blocks (420, 440) are moved; Device. The method according to claim 1,
The cover opening and closing means 600 includes a locking protrusion 610 extending upwardly from one end of the cover member 500,
It is provided to be fixed between the first and second fixed hydraulic coupling blocks 410 and 430 and the first and second movable hydraulic coupling blocks 420 and 440, respectively, and in the left direction of the first and second movable hydraulic coupling blocks 420 and 440. A stopper member 620 that interferes with the locking protrusion 610 during forward movement to open the cover member 500, and
A quick change hydraulic coupling block cover opening and closing, characterized in that it is wound on the hinge shaft 510 and provided with a restoration spring 630 for elastically supporting the cover member 500 in a direction in which the cover member 500 is closed. Device. 3. The method according to claim 2,
The cover member 500 is for a quick change hydraulic coupling block, characterized in that the cushion member 555 for reducing the contact noise is further provided on one side of the locking protrusion 610 in contact with the stopper member 620 . cover opener. a quick coupler body 100 connected to the excavator; an adapter body 300 disposed on the lower side of the quick coupler body 100 and to which an attachment is coupled; By moving the second hydraulic connection block 470 provided in the adapter body 300 to the first hydraulic connection block 460 provided to be fixed to the quick coupler body 100 with the actuator 450 left and right horizontally Hydraulic coupling means for selectively supplying the hydraulic pressure of the oil supplied to the quick coupler body 100 to the adapter body 300 side by selectively connecting the oil flow path by close contact or spaced apart; a cover member 500 provided on the second hydraulic connection block 470 and rotatably provided toward the front and the upper side about the hinge shaft 510; and a cover opening and closing means 600 for interlocking the opening and closing operation of the cover member 500 when the second hydraulic connection block 470 is moved;
The cover opening and closing means 600 includes a locking protrusion 610 extending upwardly from one end of the cover member 500,
It is provided to be fixed between the first hydraulic connection block 460 and the second hydraulic connection block 470, respectively, and interferes with the blocking protrusion 610 when the second hydraulic connection block 470 moves forward in the left direction. A stopper member 620 for opening the cover member 500, and
A quick change hydraulic coupling block cover opening and closing, characterized in that it is wound on the hinge shaft 510 and provided with a restoration spring 630 for elastically supporting the cover member 500 in a direction in which the cover member 500 is closed. Device.

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