KR20150140603A - quick coupler - Google Patents

Abstract

A quick coupler according to the present invention, which is mounted on a construction machine to combine and separate an attachment for operation, comprises: a main body part of the coupler including first and second combining parts which are formed with a gap therebetween and have first and second combining pins of the attachment combined therewith separately; a locking member installed on the main body part of the coupler at the edge of the first combining part to be able to rotate, wherein a locking protrusion part is introduced from the first combining part at the point of the first combining pin of the attachment being inserted into the first combining part and is restored at the point of the insertion being completed to prevent the separation of the first combining pin from the first combining part; a stopper installed near to the locking member and preventing the rotation of the locking member by being in contact with the locking member to prevent the separation of the first combining pin from the first combining part with the locking protrusion part of the locking member protruding from the first combining part; an elastically supporting unit installed on the main body part of the coupler and providing an elastic force so that the locking member can be elastically biased in the direction of being in contact with the stopper; and an unlocking unit for releasing the locked state of the first combining pin by rotating the locking member supported on the stopper in the direction of being separated from the stopper so that the locking protrusion part of the locking member can be introduced from the inner circumference surface of the first combining part.

Description

Quick coupler

The present invention relates to a quick coupler, and more particularly, to a quick coupler installed on a boom of an excavator and capable of coupling and separating an attachment of an excavator for a work to a boom.

Generally, an excavator is widely used construction equipment such as road construction, water supply and drainage construction, foundation construction work, land construction work, construction for collecting soil, etc. Attachment for work at each work site, for example, A bucket, a breaker, a crusher, a shear, a vibration ripper, or the like is selectively installed to perform the work.

The boom of the excavator is equipped with a coupler that allows the driver to select and replace attachments such as buckets and breakers at the tip of the boom as a way to move the boom from the driver's seat.

Korean Patent Registration No. 10-1499298 discloses a quick coupler having a safety accident prevention structure, a utility model registration No. 20-0225763 shows a coupler for an excavator, and Korean Patent No. 10-0397586 discloses an excavator bucket A safety device has been posted to secure the safety of the mounting clamp to ensure the safety of the clamp and bucket combination.

The quick coupler as described above has a structure in which the pins of the attachment are fixed by using a hook, so that the operation of the driver is not easy. That is, there is a problem that the coupling positions of the hook and the pin of the coupler must be matched with each other relatively accurately.

Korean Patent Publication No. 10-2014-0143071 discloses a quick coupler for a heavy equipment having a locking device and a quick coupler for a construction machine is disclosed in a patent document 10-2015-0093359, There are posted quick couplers for excavators in the issue.

Korean Patent Publication No. 10-2014-0143071 Korean Patent Publication No. 10-2015-0093359 Korean Patent Registration No. 10-1523072

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a method of gripping two pins of an attachment inserted in a first and a second coupling part using a transfer force of a slider installed in a main body, And the lock pin can be operated to prevent separation of the pin.

It is another object of the present invention to provide a quick coupler which is relatively simple in construction and operation and can improve reliability in operation.

According to an aspect of the present invention, there is provided a quick coupler for mounting and dismounting attachments for use in a construction machine. The quick coupler includes first and second coupling pins, A coupler main body portion having a coupling portion,

The first engaging pin of the attachment is retracted from the first engaging portion when the locking protrusion is inserted into the first engaging portion and is returned when the insertion is completed, A locking member for preventing the first engagement pin from separating from the first engagement pin,

The locking member is provided so as to be adjacent to the locking member to come into contact with the locking member to prevent the first engaging pin from being separated from the first engaging portion in a state where the locking projection of the locking member protrudes from the first engaging portion, Stopper,

An elastic supporting unit installed on the coupler main body to provide an elastic force to elastically bias the locking member in a direction to contact the stopper,

And a lock release unit for releasing the lock state of the first engagement pin by rotating the lock member supported by the stopper in a direction separating from the stopper so that the lock projection of the lock member is pulled from the inner circumferential surface of the first engagement portion.

In the present invention, the elastic supporting unit may include a guide member slidably installed on the guide guide portion of the coupler body portion, and a guide member disposed between the guide member and the lock member such that the lock member can be rotated forward and backward ≪ / RTI >

 And an elastic spring provided between the guide guide and the support jaw of the end of the guide member for elastically biasing the gold member in a direction in which the gold member contacts the stopper.

Wherein the lock release unit is slidably provided so as to be slidable in correspondence with the guide member and blocks the inlet side to prevent separation from the second engagement portion of the engagement pin of the attachment when advancing, And a first actuator installed between the coupler main body and the slider to advance and retract the slider.

In the quick coupler according to the present invention, when the coupling pin of the attachment installed in the coupler main body part is inserted into the first coupling part of the coupler body part, the locking member is rotated by the insertion force so that the locking member latching part is pulled out from the first coupling part, It is possible to prevent the detachment engagement pin from being detached from the first engagement portion after the insertion of the pin is completed, so that the attachment of the attachment is easy. In particular, it is possible to prevent the engagement pin from being detached from the first engagement portion in a state in which an artificial external force for releasing is not applied to the lock member.

In the quick coupler according to the present invention, the coupling pins of the attachment coupled to the first and second coupling parts can be simultaneously coupled by using one actuator, so that the safety of coupling can be achieved.

1 is a partially cutaway perspective view of a quick coupler according to the present invention,
FIGS. 2 and 3 are partial cutaway side views of the quick coupler according to the present invention, showing operation states thereof.
FIGS. 4 and 5 are partial cutaway side views of the quick coupler according to the present invention, showing the operating state thereof.

The quick coupler according to the present invention is for attaching attachments such as a ripper, a breaker, a bucket, and the like mounted on a construction machine, in particular, a boom of an excavator, and one embodiment is shown in Figs.

Referring to the drawings, a quick coupler according to the present invention is mounted on a boom and is used to engage boom and attachments by grasping first and second coupling pins 101 and 102 of an attachment 100, And a coupler body portion 20 having first and second coupling portions 21 and 22 to which the first and second coupling pins 101 and 102 of the attachment are coupled.

The coupler body portion 20 has a structure in which first and second plate members (not shown) are connected in parallel by a connecting member, and on an upper side of the coupler body portion 20, (28) is formed. The first engaging portion 21 formed on the coupler body portion 20 is formed to have a predetermined depth from the side in the longitudinal direction and the reinforcement member 22 may be provided continuously or discontinuously on the edge side thereof. The second engaging portion 22 is formed to extend from the edge of the lower end side of the coupler main body 20 corresponding to the first engaging portion 22 to the upper side. The distance between the first engaging portion 21 and the second engaging portion 22 is preferably substantially the same as the distance between the first and second engaging pins 101 and 102 of the attachment.

The coupler body portion 20 at the edge of the first coupling portion 21 is provided with a locking member 30 to be pulled out from the inner peripheral surface of the first coupling portion 21, An elastic support unit 40 for providing an elastic force in a direction to repel the insertion of the first engagement pin 101 into the first engagement portion 21 and providing a release force by rotating the lock member 30, (50) for releasing the locking force of the resiliently supported lock member (30) by operating a guide member (described later) of the lock member (40).

The locking member 30 has a canceling plane portion 31 which is parallel to the upper surface side inner surface of the first engaging portion 21 when rotated, And a locking protrusion 32 for preventing the locking protrusion 32 from being separated from the coupling part 21 so that the coupling protrusion 32 can protrude from the inner circumferential surface of the first coupling part 21. [ And a stopper contact portion 33 which contacts the stopper 25 provided on the stopper contact portion 33. The locking member 30 is not limited to the above-described embodiment, but may be formed of a member having a triangular or polygonal surface, and may be eccentrically installed on the hinge shaft 34 in the clamp body 20. [

The elastic support unit 40 rotates the lock member 30 so that the stopper contact portion 33 contacts the stopper 25 so that the lock projection portion 32 protrudes into the first engagement portion 21, The first guide pin 41 inserted into the coupler 21 can be prevented from being separated from the coupler main body 20 and the guide guide 41 is provided in the coupler main body 20, A guide member 42 is slidably installed and one end of the guide member 42 is connected to the lock member 30 by a connection link 43. A locking protrusion 41a is formed on the end of the guide guide 41 on the side corresponding to the connection link and a supporting protrusion 42a is formed on the other end of the guide member 42. The locking protrusion 41a, An elastic spring 45 is provided on the guide member 42 between the stopper contact portion 33 of the lock member 30 and the stopper contact portion 33 of the stopper 28, The guide member 42 is elastically biased in the direction in which it is contacted.

The elastic supporting unit is not limited to the above-described embodiment but may be modified such that the locking member 30 is elastically biased such that the stopper contacting portion 33 can contact the stopper 25, May be further provided with a lock releasing member for transmitting the acting force of the lock releasing unit 50 to one side of the locking member 30 so as to exert an external force in the separating direction of the stopper 25, May be a rod integrally formed with the lock member so as to push and rotate the lock member, and may be formed as a support groove on one side of the lock member.

The locking force canceling unit 50 is provided adjacent to the guide member 42 so as to apply a turning force in a direction opposite to the direction in which the guide member 42 is also in the form of an elastic bail, 1 engaging portion 21, as shown in Fig. For example, as shown in FIGS. 1 and 2, a slider 51 is slidably installed in the coupler body 20 in a direction parallel to the guide member 41. As shown in FIG. The slider 51 is provided with a sliding force by a first actuator installed on the coupler main body 20, that is, a hydraulic cylinder 52. When the slider 51 is retracted by the actuator 52, The guide member 41 is retracted in contact with the member 41 to rotate the lock member 30 in the direction in which the stopper 28 and the stopper contact portion 33 separate. When the slider 51 advances by the actuator 52, the end of the slider 51 advances to the entrance side of the second engagement portion 22 to block the entrance of the second engagement portion 22, Thereby preventing the second engagement pin 102 of the attachment 100 from being separated from the second engagement portion 22.

4 and 5 show another embodiment of the lock release unit according to the present invention.

Referring to the drawings, the lock releasing unit is slidably mounted on the coupler body 20 in a direction parallel to the guide member 42 of the elastic support unit 40. [ At least one supporting portion 62 is slidably installed on the coupler main body 20 in order to mount the connection supporting rod 61 to the coupler main body 20. One end of the connection support rod 61 comes into contact with the end of the guide member 42 when retreating, thereby retracting the guide member 42.

A hook member 63 for preventing the second engaging pin 102 inserted in the second engaging portion 22 from being separated from the coupler main body portion 20 adjacent to the second engaging portion 22 Is rotatably installed. The hook member 63 is rotated by the second actuator 64 installed on the coupler main body 20. When the hook member 63 is rotated and the mouth of the second engaging part 22 is opened, the hook member 63 is brought into contact with the end of the connecting supporting rod 61 to retract the connecting supporting rod 61, (65) is installed. The support pin 65 may be formed integrally with the hook member 63.

The operation of the quick coupler according to the present invention constructed as described above will be described as follows.

First, to fasten the attachment 100 in a state where the quick coupler is coupled with a heavy equipment such as a boom of an excavator, the slider 51 is retracted using a first actuator. The guide member 42 is retracted to rotate the locking member 30 so that the stopper contacting portion 31 is separated from the stopper 25 and the locking protrusion 32 is inserted.

In this state, the first engagement pin 101 of the attachment 100 is coupled to the first engagement portion 21 formed on the front side of the coupler body portion 20, (22).

Then, the first actuator 52 of the lock release unit 20 is operated to advance the slider 51 to cut off the entrance of the second engagement portion 22. [ In this process, since the pressing force for pressing the pressing member 42 is removed by the slider 51, the guide member 42 is advanced by the elastic spring 45, and the locking member 42, which is connected by the connecting link 43, The locking projection 30 is rotated and the locking protrusion 32 is led out from the inner circumferential surface of the first engaging portion 21 to prevent the first engaging pin 101 from separating from the first engaging portion 21. [

3, the hook member 63 is rotated by the second actuator 64 in the direction in which the mouth of the second engaging portion 22 is opened, and the support pin 65 is rotated in the direction of opening the connection support rod 61, The locking member 30 is rotated as described above by pushing the guide member 42 by pushing the end of the connecting member 61 backward. When the hook member 63 is rotated by the second actuator 64 in the direction in which the mouth of the second engaging part 22 is closed by the second actuator 64, the connecting support rod 61 advances and the supporting force against the guide member 42 The lock member 30 is rotated so that the stopper contact portion 33 contacts the stopper 25 and the lock projection portion 31 protrudes into the first engagement portion 21 so that the first engagement portion 21 of the attachment It is possible to prevent the engagement pin 101 from being detached from the first engaging portion 21.

The quick coupler according to the present invention, constructed as described above, is easy to assemble and detach the detachment for various operations, and can improve reliability according to the coupling.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

Claims (4)

A coupler main body part mounted on the construction machine and coupled to and separated from the attachment for operation, the coupler main body part having first and second engaging parts formed to be spaced apart from each other and to which the first and second coupling pins of the attachment are respectively engaged;
The first engaging pin of the attachment is retracted from the first engaging portion when the locking protrusion is inserted into the first engaging portion and is returned when the insertion is completed, A locking member for preventing the first engagement pin from separating from the first engagement pin,
The locking member is provided so as to be adjacent to the locking member to come into contact with the locking member to prevent the first engaging pin from being separated from the first engaging portion in a state where the locking projection of the locking member protrudes from the first engaging portion, Stopper,
An elastic supporting unit installed on the coupler main body to provide an elastic force to elastically bias the locking member in a direction to contact the stopper,
And a lock release unit for releasing the lock state of the first engagement pin by rotating the lock member supported by the stopper in a direction separating from the stopper so that the lock projection of the lock member is pulled from the inner circumferential surface of the first engagement portion Quick coupler. The method according to claim 1,
Wherein the urging member comprises a guide member slidably installed on a guide guide portion of the coupler body portion, a connection link provided between the guide member and the lock member such that the lock member can be rotated forward and backward,
And an elastic spring provided between the guide guide portion and the support jaw of the end portion of the guide member for elastically biasing the gold member in a direction in which the gold member contacts the stopper. 3. The method of claim 2,
Wherein the lock release unit is slidably provided so as to be slidable in correspondence with the guide member and blocks the inlet side to prevent separation from the second engagement portion of the engagement pin of the attachment when advancing, And a first actuator provided between the coupler main body and the slider to advance and retract the slider. 2. The quick coupler as claimed in claim 1, wherein the slider includes a slider. 3. The method of claim 2,
The lock releasing unit is slidably provided on the coupler body portion in a direction parallel to the guide member of the elastic support unit so as to contact the end portion of the guide member when the connection support bar is retracted to retract the guide member,
A hook member for preventing the second engaging pin inserted into the second engaging portion from being detached is rotatably mounted on the coupler main body portion adjacent to the second engaging portion, And a support pin is provided for retracting the connection support bar when the hook member is rotated and the inlet of the second engagement portion is opened to contact the end of the connection support rod. Coupler.

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