KR101873310B1 - Advanced structures of safety quick coupler - Google Patents

Advanced structures of safety quick coupler Download PDF

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Publication number
KR101873310B1
KR101873310B1 KR1020170036146A KR20170036146A KR101873310B1 KR 101873310 B1 KR101873310 B1 KR 101873310B1 KR 1020170036146 A KR1020170036146 A KR 1020170036146A KR 20170036146 A KR20170036146 A KR 20170036146A KR 101873310 B1 KR101873310 B1 KR 101873310B1
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KR
South Korea
Prior art keywords
rotary key
quick coupler
hitch
attachment
shaft
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Application number
KR1020170036146A
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Korean (ko)
Inventor
임용태
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임용태
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Priority to KR1020170036146A priority Critical patent/KR101873310B1/en
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Publication of KR101873310B1 publication Critical patent/KR101873310B1/en

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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/36—Component parts
    • E02F3/3604—Devices to connect tools to arms, booms or the like
    • E02F3/3609—Devices to connect tools to arms, booms or the like of the quick acting type, e.g. controlled from the operator seat
    • E02F3/3618—Devices to connect tools to arms, booms or the like of the quick acting type, e.g. controlled from the operator seat with two separating hooks
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/36—Component parts
    • E02F3/3604—Devices to connect tools to arms, booms or the like
    • E02F3/3609—Devices to connect tools to arms, booms or the like of the quick acting type, e.g. controlled from the operator seat
    • E02F3/3663—Devices to connect tools to arms, booms or the like of the quick acting type, e.g. controlled from the operator seat hydraulically-operated

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Shovels (AREA)

Abstract

The present invention improves the structure so that the movable hitch side and the fixed hitch side components for securing a safety function are simple and efficient. The movable hitch has a simple structure of a bar-shaped gravity weight 35, And a rotary key top adjustment bolt 83 and a rotary key bottom adjustment bolt 65 are provided on the fixed hitch side for restricting the operation range of the rotary key 61.
Further, in the present invention, there is also provided an elastic member adjustment bolt 82 capable of changing the range of the elastic member interposed in the rotary key that gives the rotary key 61 a bottom directionality.
Further, according to the present invention, there is provided a rotary key release tool 99 for attaching and detaching, which is temporarily mounted when the attachment is not released from the quick coupler, so that the attachment can be easily released.
The improved structure of the quick coupler provides flexibility to the individual components securing the safety function, which makes it possible to guarantee safety for a long period of time, thereby reducing the cost of the user using the quick coupler.
In addition, by inserting a frame hole in a part of the frame corresponding to the part where the hydraulic cylinder shaft and the movable hitch meet, the movable hitch and the hydraulic cylinder can be separated from each other arbitrarily, and when the part is repaired or the part is separated, It is not only easy to do without disassembling, but also can be used for various purposes.

Description

{ADVANCED STRUCTURES OF SAFETY QUICK COUPLER}

The present invention relates to a safety quick coupler which is located at an end of an arm connected to a boom rope of a heavy equipment so as to fasten and release the attachment. Particularly, in the fixed hitch and the movable hitch, the components mechanically fixing the attachment pin of the attachment are operated with maximum efficiency And to an improvement structure of a safety quick coupler in which the operation of a safety-ensuring component can be easily controlled by a driver.

When the driver inserts the coupling pin of the attachment into the fixed hitch, the rotary key having the directionality at the lower end rotates and immediately locks it, and the coupling pin of the other attachment is seated on the movable hitch by extension of the hydraulic cylinder The present invention relates to an improved structure of a safety quick coupler in which an engagement pin of an attachment can not be separated from a movable hitch by preventing arbitrary rotation of a gravity additional movable hitch operated by gravity.

The conventional quick coupler having such a function is only those that have been invented by the applicant, and therefore the inventor of the present invention can not but look at the invention to which the applicant has applied, 2015-133894 is as follows.

1, when the coupling pin of the attachment is inserted into the fixed hitch of the quick coupler according to the operation of the driver, the rotary key 61 having a downward directional orientation automatically inserts the coupling pin 11 of the attachment When the hydraulic cylinder is maximally extended after the movable hitch is positioned close to the coupling pin of another attachment, the coupling pin of the attachment is engaged with the movable hitch and the gravity weight 35 and the safety collar 31 Prevents the attachment pin of the attachment from being detached from the movable hitch so that the attachment can not be separated from the quick coupler in any case during operation.

When such a type of quick coupler is completed, the quick coupler is inclined at about 90 to 120 degrees for disassembly. When such a high inclination angle is given, the safety collar 31 restricts the movable hitch 14 So that the engagement pin 12 of the attachment can not be restrained by the movable hitch 14.

When the hydraulic cylinder is contracted in this state, the engagement pin of the attachment is released from the movable hitch 14 side. At this time, the lower end 62 of the rotary key is attached to the permanent magnet 42 formed on the shaft portion 24 of the hydraulic cylinder.

In this state, when the driver lifts the quick coupler 10 while tilting the quick coupler 10 in a clockwise direction so that the coupling pin 11 of the attachment is released from the fixed hitch 13, the coupling pin 11 of the attachment is moved from the lower end The permanent magnet 42 attached to the shaft portion 24 is lifted up and the rotation key 61 is stopped by the stopper of the rotary key 61, (62) falls down and finally returns to the same state as when trying to join the attachment to the quick coupler for the first time.

However, in the conventional quick coupler 10 having such a structure, since the structure of the gravity weight 35 and the safety collar 31 provided on the movable hitch 14 side has a complicated structure, there is a problem that the cost is increased , A malfunction such as disconnection of the rotary key once attached to the permanent magnet and a permanent magnet after the rotation of the rotary key in a series of operations that should be performed in accordance with the change of the inclination angle of the quick coupler also occurs on the fixed hitch side, There was an issue that did not work.

Further, the operating range of the gravity weight 31 and the safety ring 35, the operating range of the rotary key 61, and the lower directional strength of the rotary key 61 are already determined when the quick coupler 10 is shipped from the factory The driver can not operate according to his / her driving tendency because the driver does not reflect the minute difference of operation between the driver and the driver, and the driver can not easily and quickly respond when the safety device does not operate partly There was a problem.

This different driver behavior and uniform configuration of uniformly defined safety components sometimes caused the driver to doubt whether the safety function of the conventional quick coupler was working properly, So that the safety function can not be smoothly realized.

Even if the rotary key 61 is lowered normally due to the release of the attachment, when the coupling pin of the attachment is inserted in the fixed hitch and the coupling pin of another attachment is coupled again to the movable hitch If the coupling pin of the attachment is struck on the lower end of the quick coupler, the rotation key 61, which has already been tilted by the impact, may easily attach to the permanent magnet, causing a malfunction to release the safety device.

Finally, in the conventional quick coupler, there is no hole communicating with the inside of the frame, so that even if the coupling part between the hydraulic cylinder and the movable hitch is broken or a part of the quick coupler is pulled out, There is a problem that the whole should be disassembled because there is no number.

In addition to the above-mentioned prior art, in the conventional technique of the patent application 10-2016-6560 filed by the applicant, a method of forming a projection on a part of the movable hitch and forming a rod-like gravity weight is adopted, There is no method for stopping the gravity pointing operation on the movable hitch side by the driver. Further, the patent application also shows that the above-mentioned prior art There are many problems that have not been solved at all and there are many areas that need improvement.

The object of the present invention is firstly to provide that the rotation key 61 is moved in a predetermined series of operations in relation to the permanent magnet even if the driver suddenly impacts the frame suddenly for some reason unknown from any angle of the quick coupler during operation of the quick coupler So as not to cause a malfunction such as a deviation from the above.

It is also an object of the present invention to provide an improvement structure for a safety quick coupler in which the components of the movable hitch side and the fixed hitch side for securing the safety function of the quick coupler are simple and efficient to operate, Or to allow the driver to manually control the quick coupler in the event of a malfunction.

Still another object of the present invention is to provide such a quick coupler improvement structure that enables a driver to control whether or not the gravity weight provided on the movable hitch is operated so that the worker can work quickly without interruption in a failure.

 Another object of the present invention is to provide a guide wall having a specific inclination angle to a frame of a fixed hitch portion to increase the reliability of the operation of the rotary key, and a weight rod is provided thereon to prevent the rotation key from malfunctioning One such improvement is to provide a structure.

It is still another object of the present invention to provide an elastic key for a rotary key,

By providing the upper elastic member adjusting bolt which can limit the range of the member, it is possible to control the elastic force of the elastic member finely, thereby reducing the errors that can be caused by the manufacture of the quick coupler and the resulting malfunctions. As a result, And to provide an improvement structure that can guarantee the operation of functional elements.

It is another object of the present invention to provide flexibility for individual components securing the safety function as described above, thereby ensuring long-term safety and ultimately reducing the cost of users who use the quick coupler.

It is still another object of the present invention to provide a method of manufacturing a quick coupler in which a hollow hole is formed in a portion of a frame corresponding to a portion where a cylinder rod and a movable hitch meet, So that the work can be easily performed when the part is repaired or disassembled so that the assembly and the degradability can be achieved to the maximum.

In the present invention, a gravity weight having a simple rod-like structure capable of fixing an engagement pin of the attachment in cooperation with the upper projection and having an upper projection at the upper end of the movable hitch is provided at the upper end of the movable hitch, The control bolt is mounted on a part of the frame side of the frame and a gravity collider is formed on the gravity weight as a part cooperating with the adjustment bolt so that the control bolt and the gravity collider cooperate so that the driver can arbitrarily select the operation of gravity weight It is.

Furthermore, a weight rod is provided on the fixed hitch side so as to be guided by a guide wall formed in the frame, so that pressure can be applied to the rotary key as needed.

In addition, in order to adjust the operation range of the rotary key, the upper end adjusting bolt is installed on the rotary key cover located at the upper end of the rotary key so that the operation range of the rotary key can be changed. The adjustment bolt 65 is provided to adjust the distance between the lower end 29 of the cylinder shaft portion and the rotation key side piece 62 so that the rotary key 61 is fixed by the lower end 29 of the shaft portion during the extension of the hydraulic cylinder, I can get one more time.

Further, an elastic member adjusting bolt is formed on the top cover of the rotary key so as to adjust the operation range of the rotary key elastic member, so that the operating range of the elastic member with respect to the rotary key can be adjusted.

Further, the present invention provides a rotary key releasing tool that is attached to a rotary key so that an operator can release the attachment when the attachment is not released from the quick coupler.

Finally, according to the present invention, when the quick coupler is repaired by forming a frame hole in the frame or when assembling or disassembling the joint part between the movable hitch and the hydraulic cylinder, the inside can be disassembled and assembled from the outside to maximize the degradability and assemblability A quick coupler improvement structure having such a frame is provided.

In the present invention, by using a simple structure formed on the movable hitch and the fixed hitch, it is possible to provide an improved structure of the safety quick coupler in which all the safety functions are efficiently performed while improving the disassembly and assembling performance by 200% It is possible to do.

In addition, since various adjustment bolts are provided to give flexibility to safety-assured components, it is possible for the driver to use the quick coupler conveniently by adjusting the driving habit of the driver, Even if deformation occurs in the separation distance, it is possible to modify the separation distance or operation between the safety function components by adjusting the adjustment bolts newly added in the present invention, so that these safety device components can continuously perform their functions .

In addition, this simple structure not only provides a low-cost quick coupler, but also makes it possible to use the quick coupler for a long time without having to purchase a new quick coupler.

In addition, the quick coupler of the present invention forms a multi-purpose frame hole at a corresponding portion of the frame corresponding to the joint portion between the movable hitch and the hydraulic cylinder, thereby making the quick coupler detachable and assembled And provides an advantage that can greatly improve the performance.

FIG. 1 is a schematic view showing an example of a quick-locker having a conventional safety device. In the fixed hitch 13, a rotary key 61 fixes a coupling pin 11 of an attachment. In the movable hitch 14, (35) and the safety collar (31) secure the remaining fastening pins (12) of the attachment.
2 shows the improved structure of the safety quick coupler according to the present invention in which the rotary key 61 fixes the attachment pin 11 of the attachment which is seated on the fixed hitch 13 and the movable hitch 14, And the upper projection 17 cooperates with the gravity weight 35 to fix the engagement pin 12 of the attachment seated on the movable hitch.
3 shows a gravity weight 35 and an upper projection 17 located at the upper end of the movable hitch 13 according to the present invention. The gravity weight 35, the movable hitch 14 and the gravity weight adjusting bolt 81 ) And a relative position of the corresponding region.
4 shows the hydraulic cylinder and the rotary key located at the upper side of the fixed hitch 13 according to the present invention and the cylinder rod 24 of the hydraulic cylinder 25 and the weight rod 67 located at the upper end of the fixed hitch 13 And is a perspective view showing the relative positions and relative positions of the respective components responsible for the safety function.
FIG. 5 is a view showing different views of the rotary key 61 positioned at the upper end of the fixed hitch 13, which is a component of the improved safety quick coupler according to the present invention.
6 is a view showing the cylinder shaft portion 24 of the hydraulic cylinder 25 as one component of the improvement structure of the safety quick coupler according to the present invention.
7 is an explanatory view showing the rotation key 61 and the upper lid 76 in more detail in the improved structure of the safety quick coupler according to the present invention.
FIG. 8 illustrates an operation state of the improvement structure of the safety quick coupler according to the present invention. When the driver first moves the quick coupler 10 to engage the engagement pin 11 of the attachment with the fixed hitch 13, And the pin 11 pushes the rotary key 61 and the shaft lower end 29 of the hydraulic cylinder 25.
9 shows the operating state of the improvement structure of the safety quick coupler according to the present invention in which two coupling pins 11 and 12 of the attachment are completely engaged with the fixed hitch 13 and the movable hitch 14 of the quick coupler, And the work can be done.
FIG. 10 is a view showing an operation state of the improvement structure of the safety quick coupler according to the present invention, showing a state in which the quick coupler is inclined at an angle to release the attachment from the quick coupler after the work is finished.
FIG. 11 illustrates an operation state of an improved structure of the safety quick coupler according to the present invention. FIG. 11 is a view showing a state in which the attachment 100 is separated from the quick coupler 10 from FIG. 9.
12 shows an operation state of an improved structure of a safety quick coupler according to another embodiment of the present invention and shows a push type quick coupler
13 shows a gravity weight 45 used in a push type quick coupler according to another embodiment of the present invention.
14 is a view showing an operation state of the improvement structure of the safety quick coupler according to another embodiment of the present invention, showing a state in which the quick coupler is provided with an inclination angle of about 110 degrees to release the attachment from the quick coupler after the work is finished It is a picture.

FIG. 2 is an explanatory view illustrating an improved structure of a pull type safety quick coupler according to an embodiment of the present invention.

As shown in the drawing, a movable hitch 14 is provided on the left side, a fixed hitch 13 is provided on the right side, and a hydraulic cylinder 25 is disposed in the center.

In the present invention, as described later, when the coupling pin 11 of the attachment is inserted into the fixed hitch, the rotary key 61 oriented to the lower end automatically locks the coupling pin 11 of the attachment, When the movable hitch of the quick coupler is positioned near another engaging pin so as to engage with the engaging pin of one of the attachments and then the hydraulic cylinder is extended, the quick coupler fixes the other engaging pin of the attachment The two engagement pins 11 and 12 of the attachment are completely fixed to the fixed hitch 13 and the movable hitch 14, respectively.

When the quick coupler is fully engaged with the attachment, the gravity weight 35 is engaged with the upper protrusion 17 formed on the upper end of the movable hitch 14 to restrict the operation of the movable hitch 14 on the side of the movable hitch 14, The coupling pin 12 of the rotary key 61 can not be released from the movable hitch 14 and the attachment coupling pin 11 is blocked by the rotary key lower end 63 of the rotary key 61 on the fixed hitch 13 side, The lower end 63 of the rotary key can not be detached from the fixed hitch 13 until the rotary key bottom end 63 is lifted up.

In the present invention, the gravity weight 35 is in the form of a rod in a very simple form, unlike the prior art. Because of this simple structure, the cost reduction effect can be obtained in the present invention.

In addition, the movable hitch 14 is provided with an upper projection 17 cooperating with the gravity weight 35. During operation, these two elements are squeezed with each other, and therefore, the rotation of the movable hitch 14 The engagement pin 12 of the attachment can not be detached from the movable hitch.

The gravity weight adjusting bolt 81 is provided on the frame side portion 73 located at the upper end of the gravity weight 35. The gravity weight 35 is provided with a gravity collider The gravity weight 35 is adjusted by manually adjusting the gravity weight adjusting bolt 81 so that the gravity weight 35 can not be operated by pushing the gravity collider 36 all the way to the maximum. In this way, the gravity weight adjusting bolt 81 and the gravity collider 36 on the side of the gravity weight 25 allow the operator to stop the operation of the gravity weight 37 as needed.

The gravity weight adjusting bolt 81 may be formed in accordance with a conventional technique. In general, a thread is formed in a corresponding portion of the frame side portion 73 and a gravity weight adjusting bolt 81 is formed of a bolt This bolt can be made to move the thread up and down.

One of the parts that plays an important role in the improvement structure of the safety quick coupler of the present invention is the frame hole 72. This frame hole is formed on a part of the locus where the cylinder rod 27 of the hydraulic cylinder 25 and the movable hitch hinge shaft 19 of the movable hitch 14 meet.

There is no such a hole in the conventional quick coupler. Therefore, when a failure occurs between the movable hitch 14 and the cylinder rod 27 when the quick coupler is manufactured, or when it is necessary to temporarily disassemble it If there is, there are a few irrational parts such as disassembly of the entire quick coupler. However, if such a frame hole 72 is formed in the frame, it is possible to solve most troubles and problems through the hole very easily. In addition, it is possible to increase the efficiency by more than 200% in other assembling and repairing, and in addition, .

Further, the frame hole 72 is not limited to the safety device according to the present invention, but can be used for both the hydraulic cylinder 25 and the quick coupler having the movable hitch 14, If you are a general technician, you can easily understand.

3 is a more detailed view of the gravity weight 35 and the upper projection 17 positioned at the upper side of the movable hitch 14 according to the present invention.

As shown, the gravity key 35 of the present invention has a simple rod shape. Further, the movable hitch 14 is provided with an upper projection 17 cooperating therewith. When the inclination angle of the quick coupler changes, the relative positions of the quick couplers are changed. In a state shown in the drawing, that is, in a state where the attachment and the quick coupler 10 are engaged The upper projection 17 is engaged with the gravity weight 35 and restrains the rotation of the movable hitch 14 to rotate clockwise about the movable hitch shaft 15 so that the engagement pin 12 of the attachment is movable So that it can not be separated from the hitch 14.

However, if the quick coupler tilts between 90 degrees and 120 degrees, the gravity weight 35 moves to the lower end due to gravity, and the gravity weight 35 moves to the upper end projection 17 of the movable hitch 14 In this state, when the hydraulic cylinder 25 is retracted, the movable hitch 14 can be rotated, so that the engagement pin 12 of the retainer fixed to the movable hitch 14 can be released do.

In addition, the gravity weight 35 is provided with a gravity collider 36, so that the function of the gravity weight 35 can be stopped by adjusting the gravity weight control projection 81. [

4 is a perspective view of a rotary hinge according to an embodiment of the present invention in which a rotary key 61 positioned at the upper side of the fixed hitch 13 and a weight bar (not shown) located at the upper position of the fixed hitch 13 and inserted in the guide walls 6 ' 67 and the cylinder shaft portion 24 extending from the hydraulic cylinder 25, as shown in FIG.

As shown in the figure, an elliptical cylinder shaft hole 23 is formed in a cylinder shaft portion 24 of a hydraulic cylinder 25 according to the present invention, and an upper shaft end 28 is provided at an upper end thereof. . A permanent magnet is provided on the lower surface of the shaft upper end 28 so that the rotary key 61 can be attached to the permanent magnet and the shaft lower end 29 is engaged with the rotary key 61 when the hydraulic cylinder 25 is contracted. The clamping pin 11 of the attachment is placed on the fixed hitch 13 or is always lowered to the lower end of the fixed hitch 13 by the weight of the cylinder and the elastic member.

In the present invention, a permanent magnet is usually formed on the lower end surface of the shaft top 28. However, it is also possible to use an electromagnet. For example, by forming a coil on the shaft upper end and applying electricity to the coil, It is possible to make the function of the permanent magnet mentioned above, and thus, the use of the electromagnet instead of the permanent magnet is also included in the technical idea of the present invention, and it is not beyond the scope of the present invention.

A weight rod 67 is provided at the upper end of the shaft portion 24 of the hydraulic cylinder so that the weight rod 67 can move between the guide walls 6 ' The safety device of the quick coupler 10 of the present invention contributes to the stable operation of the quick coupler 10 because pressure is not applied to the rotary key 61 in accordance with the inclination angle of the quick coupler 10. In addition, It is possible to vary the force applied to the rotary key 61 according to the degree of inclination of the guide walls 6 ', 6 "and thus to change the inclination of the guide walls 6 ' will be.

Further, the rotation key 61 is configured to rotate about the rotation key shaft 64, and the elastic member 88 is interposed therebetween so that the rotation key lower end 63 is always oriented to the lower end.

5 is a view showing the rotation key 61 on the side of the fixed hitch 13 in different views at different views in the improved structure of the quick coupler according to the present invention.

5A shows a rotation key lower end adjusting bolt 65 formed at the lower end of the rotary key side piece 62 of the rotary key 61. As shown in FIG. The rotation key lower end adjusting bolt 65 functions to finely adjust the interval between the lower shaft end 29 and the rotary key side piece 62. When the hydraulic cylinder 25 is extended, By pushing the adjustment bolt 65 and fixing the safety device by the hydraulic pressure, the function of securing the safety once more becomes.

The distance between the lower shaft end 29 and the rotation key side 62 can be adjusted by adjusting the degree of protrusion of the rotation key adjusting bolt 65.

Further, as shown in FIG. 5 (b), a rotary key rear surface groove 66 is formed on the back surface of the rotary key. The rotary key release tool 99 inserted into the groove includes a release tool body 97 inserted into the rotary key rear surface groove 66, And a release tool elastic member 98 connected to the release tool 97. When the attachment is not released from the quick coupler, the rotary key release tool 99 is used to manually insert the rotary key release tool 99 into the rotary key back groove 66 to release the coupling pin of the attachment from the quick coupler do.

It is preferable to form the release tool body 97 of the rotary key release tool 99 as a permanent magnet so that the rotary key release tool 99 is easily fitted into the rotary key back surface groove 66 and the release tool elastic member 98 May be formed of a spring, but any elastic member which can push up the rotary key 61 even if it is not necessarily a spring can be used.

In addition, the rotary key release tool 99 can be set not only to the rotary key but also to the release tool used for the gravity weight on the fixed hitch side. For example, a gravitational weight releasing tool used between the gravitational collider 36 and the frame side 73 shown in FIG. 3 may also be considered by those skilled in the art.

6 is a view showing the cylinder shaft portion 24 of the hydraulic cylinder 25 according to the present invention. As shown in the figure, a permanent magnet 20 'is formed on a lower end surface 28' of the shaft upper end 28 located at the upper end of the cylinder shaft 24 and a permanent magnet 20 is fixed to the lower end surface 28 '. The permanent magnet 20 is rotated by the rotation key lower end 63 of the rotary key when the driver changes the inclination angle of the quick coupler by 90 degrees to 120 degrees, And the lower end face 63 'of the key bottom end 63 is attached to the permanent magnet 20.

It is preferable that the permanent magnet 20 is formed so as to enter approximately the inside of the lower end surface 28 'of the shaft top 28 so that the permanent magnet 20 is not damaged. The reason why the permanent magnet 20 is formed so as to enter the permanent magnet groove 20 'rather than the lower end face 28' is that the force of the quick coupler is considerably applied even if the rotary key 61 is slightly attached This is because the permanent magnet 20 can easily be damaged, and thus it is an essential component for protecting the permanent magnet 20.

Meanwhile, it is preferable that the permanent magnet 20 is formed on the lower end surface 28 'of the shaft end 28, but it may be provided on the rotation key lower end surface 63' of the rotation key 61 shown in FIG. 5 will be. This is because the permanent magnet must not necessarily be present on the shaft top 28 if the rotation key 61 is attached to the shaft top 28 at a required point.

In addition to forming the permanent magnets on the shaft upper end 28 and the rotary key lower end surface 63 'of FIG. 5, it is also possible to form the electromagnets by winding the coils to perform the above-mentioned function

7 is an explanatory view showing the rotary key 61 and the upper cover 76 in more detail in the quick coupler according to the present invention.

As shown in the figure, the upper lid 76 at the upper end of the rotary key 61 is provided with an elastic member adjusting bolt 82 and a rotating key upper adjusting bolt 83. The elastic member adjusting bolt 82, The rotation key upper end adjustment bolt 83 can be protruded to the upper end position of the rotation key 61 so that the rotation key spring 88 can be rotated 61 can be adjusted.

These two adjustment bolts may also be formed by conventional conventional methods, typically by forming a thread in the top lid 76 and inserting a bolt into the thread, the bolt may be formed to move up and down .

Such an adjustment bolt can be used to maintain the safety function by adjusting the operating range or the elastic force of the rotation key 61 which ensures safety by long use.

The operation state of the present invention will now be described.

8 shows the operating state of the quick coupler 10 according to the present invention. When the first driver moves the quick coupler 10 to engage the engagement pin 11 of the attachment with the fixed hitch 13, (11) pushes the shaft lower end (29) of the hydraulic cylinder (25).

When the driver moves the quick coupler 10 to push the coupling pin 11 of the attachment into the fixed hitch 13 of the quick coupler 10 as shown in the figure, The rotary key 61 is lifted and then the weight rod 67 and the rotary key 61 and the rotary key 61 are lifted up, The engagement pin 11 of the attachment which is fastened to the fixed hitch 13 is quickly fixed again by the elastic member 88 interposed in the fixing hole 61. The operator then moves the quick coupler to fasten another attachment coupling pin to the movable hitch.

9 shows the operating state of the quick coupler according to the present invention in which two coupling pins 11 and 12 of the attachment are coupled to the fixed hitch 13 and the movable hitch 14 of the quick coupler, And the state of the state.

When the quick coupler 10 is coupled to the attachment 100, the rotary key 61 locks the opening of the fixed hitch 13 on which the coupling pin 11 of the attachment is seated and fixes the movable hitch 14, The gravity weight 35 is engaged with the upper protrusion 17 of the movable hitch 14 to prevent the movable hitch 14 from rotating so that the engagement pin 11 of the attachment is prevented from being detached from the movable hitch 14, The coupling pins 11 and 12 of the attachment are completely fixed to the quick coupler.

Even if the attachment is completely engaged with the quick coupler 10, even if the hydraulic cylinder 25 is broken, the attachment can not be separated from the quick coupler because, as described in detail with reference to FIG. 10, 10 can be released only when the hydraulic cylinder 25 is operated in a state where the inclination angle is given.

The gravity weight adjusting bolt 81 may be maximally adjusted to push the gravity collider 36 of the gravity weight 35 to prevent the gravity key 35 from operating according to the need of the driver.

10 is a view showing a state of the quick coupler according to the present invention when the attachment 100 is released from the quick coupler 10 after the operation is completed.

As shown in the drawing, when releasing the attachment from the quick coupler of the present invention, the driver must first tilt the quick coupler at an angle of about 90 to 120 degrees. The gravity weight 35 which blocks the rotation of the upper projection 17 of the movable hitch 14 is lowered to the lower end by the gravity on the side of the movable hitch 14. On the fixed hitch 13 side, (29) is in a state supporting the rotation key lower end adjusting bolt (65) of the rotary key.

When the driver shrinks the hydraulic cylinder 25 in the above state, the shaft lower end 29 supporting the rotary key lower end adjusting bolt 65 of the rotary key 61 is separated from the rotary key lower end adjusting bolt 65, The rotary key 61 of the rotary shaft 13 rotates while pushing the weight rod in the guide wall whose inclination angle is reduced so that the rotary key lower end 63 is engaged with the permanent magnet 20 formed on the shaft upper end 28 of the cylinder shaft portion 24 Respectively.

When the hydraulic cylinder 25 is contracted, the gravity weight 35 can not interfere with the rotation of the movable hitch 14, so that the movable hitch 14 can rotate around the movable hitch shaft 15, The coupling pin 12 can be freely detached from the movable hitch 14 so that the coupling pin 11 of the attachment can push the shaft bottom end 29 while allowing the driver to restore the inclination of the quick coupler 10 When the quick coupler 10 is operated, since the rotary key lower end 63 of the rotary key 61 is already attached to the permanent magnet formed on the shaft upper end 28, the coupling pin 11 of the attachment is moved to the position of the quick coupler 10, Without any obstacles.

Fig. 11 is a view showing a state in which the attachment is detached from the quick coupler 10 in Fig. 10 in the quick coupler 10 according to the present invention.

10, when the rotary coupler 61 is already attached to the magnet, the coupling pin 11 of the attachment is moved out of the fixed hitch 13 while pushing the shaft lower end 29 without any obstacle The coupling pin 11 of the attachment is pulled out and the coupling pin 11 of the attachment pushes the shaft lower end 29 to lift up the shaft upper end 28 and the permanent magnet formed on the shaft upper end 28 The attached rotary key 61 drops to the lower end, whereby the quick coupler returns to the state before the attachment of the first attachment.

12 shows a quick coupler 10 of another embodiment in which the technical idea according to the present invention is applied to a quick coupler 10 of a push type.

As shown in the figure, in the push type quick coupler, the gravity weight 45 is formed inside the movable hitch 14 and is provided in the gravity pivot 47. The gravity weight 45 is operated according to the gravity force as in the full-type quick coupler described above. When the inclination angle of the quick coupler is tilted by 90 to 120 degrees by the same principle, The engagement pin 12 of the attachment can be released from the movable hitch 14 when the hydraulic cylinder is contracted.

13 shows a gravity weight 45 used in a push type quick coupler according to another embodiment of the present invention.

In the drawing, the gravity pivot holes 47 'are fitted with the gravity pivots 47 of the movable hitches 14 shown in Fig. 11, so that the gravity pendulums 46 can be moved in the directions A and B respectively by gravity Respectively.

With such a configuration, when the quick coupler is inclined at an angle of 90 to 120 degrees, gravity is further rotated so that the engagement pin of the attachment fixed to the movable hitch can be released.

 FIG. 14 is a view showing a state in which a push type quick coupler, which is another embodiment according to the present invention, is tilted to release the attachment from the quick coupler after the operation is finished.

As shown, in the push type quick coupler according to the present invention, when releasing the attachment, the driver must first tilt the quick coupler at an angle of about 90 to 120 degrees. When the inclination is given, the gravity weight 45, which locks the movable hitch 14, is rotated by gravity on the movable hitch side so that the releasing projection 46 shown in Fig. 13 ascends counterclockwise, and the fixed hitch 13 The shaft lower end 29 is in a state of pushing the rotation key lower end adjusting bolt 65 of the rotary key 61.

At this time, when the cylinder is contracted, the engagement pin 12 of the attachment is freely detached from the movable hitch 14 on the side of the movable hitch 14. On the fixed hitch 13 side, the shaft lower end 29 is engaged with the rotation key lower end adjusting bolt The engaging pin 11 of the attachment is moved by the operation of the quick coupler to the quick coupler 10 (10) by the operation of the quick coupler while the rotary key 61 is rotated to be attached to the permanent magnet formed on the shaft upper end 28 of the cylinder shaft portion 24 As shown in Fig.

Even if the inclination angle is given, the lower end 63 of the rotary key 61 of the rotary key 61 can not be attached to the permanent magnet before the hydraulic cylinder is contracted. However, when the hydraulic cylinder is contracted, Is attached to the permanent magnet formed on the shaft upper end 28 and the quick coupler is operated so that the coupling pin of the attachment pushes the shaft lower end 29 while allowing the inclination of the quick coupler 10 to be restored by the driver's operation in the ideal state Since the rotary key lower end 63 of the rotary key is already attached to the permanent magnet formed on the shaft upper end 28, the engagement pin 11 of the attachment pushes the cylinder shaft portion 24 without any obstacle, The attachment 100 and the quick coupler 10 are separated from each other as the rotary key lower end 63 of the rotary key 61 attached to the permanent magnet formed on the shaft upper end 28 is separated from the permanent magnet. Separate from each other State. .

10: quick coupler 11, 12: fastening pin 13: fixed hitch
14: movable hitch 15: movable hitch shaft 17: upper projection
19: movable hitch hinge shaft 20: permanent magnet 21: cylinder shaft
23: cylinder shaft 24: cylinder shaft 25: cylinder body
28: Upper shaft portion 29: Lower shaft portion 35, 45: Gravity load
37,47: gravity pivot 61: rotation key 63. rotation key bottom
65: Rotary key bottom adjustment bolt 81: Movable hitch adjustment bolt
82: elastic member adjustment bolt 83: rotation key upper adjustment bolt

Claims (9)

The hydraulic cylinder is provided at the center of the inner side of both side frames and the movable hitch and the fixed hitch are provided on the left and right sides of the hydraulic cylinder for the attachment and detachment of the attachment by hanging from the tip of the end arm of the boom. The movable hitch hinge shaft of the movable hitch is moved so that the movable hitch is rotated about the movable hitch shaft so that the fastening pin of various attachments such as a bucket can be engaged and disengaged,
The movable hitch 14 having the upper projection 17 at its upper end,
A gravity weight adjusting bolt 81 formed on a part of the frame corresponding to the movable hitch,
A gravity collider 36 adapted to engage or disengage according to the inclination angle of the upper coupler 17 of the movable hitch 14 and the quick coupler and to cooperate with the gravity weight adjusting bolt 81, The gravity weight 35,
A rotary key (61) mounted on a rotary key shaft protruding from the frame and positioned at an upper end of the fixed hitch and rotated downward through an opening formed at the upper end of the fixed hitch about the rotary key shaft,
A weight rod 67 positioned at the top of the rotary key and adapted to move along a guide wall formed in the frame,
The hydraulic cylinder 25 having a cylinder shaft portion 24 which is allowed to flow in the cylinder shaft 21 and permanent magnets formed on the shaft upper end 28 of the cylinder shaft portion 24,
A cylinder body 21 which can be positioned below the upper surface of the fixed hitch 13 when the cylinder shaft 21 is engaged with the cylinder shaft hole 23 of the cylinder shaft 24 of the hydraulic cylinder 25 And a shaft bottom end 29 extending from the shaft end 25,
When the attachment is mounted, the attachment pin of the attachment is automatically mounted on the fixed hitch as the rotary key 61 of the attachment's quick coupler is lifted and lowered. When the attachment is released, the attachment pin is arbitrarily inclined to the quick coupler, The permanent magnet 20 and the rotary key 61 are engaged when the cylinder is contracted in the fixed hitch. Thereafter, the operation of the operator's quick coupler causes the attachment So as to be released from the quick coupler while lifting up the shaft lower end (29). The method according to claim 1,
The lower end of the rotary key side piece 62 of the rotary key 61 is provided with a rotary key lower end adjusting bolt 65 so that the lower end 29 of the hydraulic cylinder 25 is in contact with the rotary key side piece 62 The distance between the surfaces of the safety quick coupler can be adjusted. The method according to claim 1,
And an upper cover 76 located at the upper end of the rotary key 61 is formed with a rotary key top adjustment bolt 83 for adjusting the operation range of the rotary key 61. [ The method according to claim 1,
An elastic member adjusting bolt 82 is provided on the top cover 76 positioned at the upper end of the rotary key so as to adjust the operation range of the elastic member that provides the directionality to the lower end of the rotary key 61 Improved structure of safety quick coupler The method according to claim 1,
The weight rod 67 is provided between the guide walls 6 'and 6''having a predetermined inclination angle with respect to the fixed hitch frame so that the rotation of the rotary key 61 in accordance with the inclination angle of the guide walls 6' and 6 ' The safety quick coupler according to claim 1, The method according to claim 1,
The permanent magnet 20 formed on the lower end face 28 'of the shaft upper end 28 of the cylinder shaft portion 24 is formed on the rotary key lower end face 63' of the rotary key, And the bottom surface is an electromagnet. The method according to claim 1,
The permanent magnet 20 formed in the permanent magnet groove 20 'of the lower end face 28' of the shaft end upper end 28 of the cylinder shaft portion 24 has more permanent magnet grooves 20 'than the lower end face 28' The safety quick coupler according to claim 1, characterized in that the safety quick coupler The method according to claim 1,
The quick coupler is used for releasing the safety device when the coupling pin of the attachment is not released. The rotary key has a rotary key rear surface groove 66, which is inserted into the rotary key rear surface groove 66 Wherein a rotary key release tool (99) is provided to the safety quick coupler The hydraulic cylinder is provided at the center of the inner side of both side frames and the movable hitch and the fixed hitch are provided on the left and right sides of the hydraulic cylinder for the attachment and detachment of the attachment by hanging from the tip of the end arm of the boom. The movable hitch hinge shaft of the movable hitch is moved so that the movable hitch is rotated about the movable hitch shaft so that the fastening pin of various attachments such as a bucket can be engaged and disengaged,
A frame hole 72 is formed in the frame corresponding to a part of the locus where the cylinder rod 27 of the hydraulic cylinder and the movable hitch shaft 19 of the movable hitch 14 meet,
A failure or a problem can be solved through the frame hole 72 when a malfunction occurs between the movable hitch 14 and the cylinder rod 27 and the movable hitch 14 and the cylinder rod 27 can be assembled And can be operated through the frame hole (72) when repairing or repairing the quick coupler.
KR1020170036146A 2017-03-21 2017-03-21 Advanced structures of safety quick coupler KR101873310B1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20210056069A (en) 2019-11-08 2021-05-18 안성준 Quick coupler for excavator

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20210056069A (en) 2019-11-08 2021-05-18 안성준 Quick coupler for excavator

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