KR20130101344A - Simultaneous operable crane boom assembly - Google Patents

Simultaneous operable crane boom assembly Download PDF

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Publication number
KR20130101344A
KR20130101344A KR1020120022414A KR20120022414A KR20130101344A KR 20130101344 A KR20130101344 A KR 20130101344A KR 1020120022414 A KR1020120022414 A KR 1020120022414A KR 20120022414 A KR20120022414 A KR 20120022414A KR 20130101344 A KR20130101344 A KR 20130101344A
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KR
South Korea
Prior art keywords
boom
draw
cylinder
rod
cylinder body
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KR1020120022414A
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Korean (ko)
Inventor
배대권
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동양기전 주식회사
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Priority to KR1020120022414A priority Critical patent/KR20130101344A/en
Publication of KR20130101344A publication Critical patent/KR20130101344A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C13/00—Other constructional features or details
    • B66C13/18—Control systems or devices
    • B66C13/40—Applications of devices for transmitting control pulses; Applications of remote control devices
    • B66C13/42—Hydraulic transmitters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/62—Constructional features or details
    • B66C23/64—Jibs
    • B66C23/68—Jibs foldable or otherwise adjustable in configuration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C2700/00—Cranes
    • B66C2700/03—Cranes with arms or jibs; Multiple cranes

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Automation & Control Theory (AREA)
  • Jib Cranes (AREA)

Abstract

The present invention relates to a crane boom assembly capable of simultaneous pull-out. The crane boom assembly which can be pulled out simultaneously is a boom assembly driving apparatus of a crane having a main boom and a plurality of pull-out booms which are pulled in and out of the main boom, and are sequentially arranged inside the main boom. A first rod fixed to the main boom so as to draw in and out the first draw-out boom from the main boom when the first draw-out boom to the N-th draw-out boom (N is a natural number of 3 or more) is inserted; A first cylinder having a first cylinder body which is inserted into and retracted and fixed to the first draw-out boom; A first control unit supplying a working fluid to the first cylinder or discharging the working fluid from the first cylinder; A second rod fixed to the first draw-out boom and a second cylinder body fixed to the second draw-out boom so as to draw in and out a second draw-out boom from the first draw-out boom; A second cylinder having a; A third rod fixed to the second drawout boom and a third cylinder inserted into and out of the second drawout boom so as to draw in and out the third drawout boom from the second drawout boom; A third cylinder having a body; And a second control unit operating simultaneously with the first control unit to supply the working fluid to the third cylinder or discharging the working fluid from the third cylinder so that the first and third cylinders operate simultaneously. It is done.

Figure P1020120022414

Description

Simultaneous Operable Crane Boom Assembly

The present invention relates to a crane boom assembly which can be pulled out at the same time, in particular, a plurality of booms constituting the boom assembly at the same time withdrawal or withdrawal of the working time to shorten the working time, the fuel boom assembly can be reduced due to the reduction of working time It relates to a drive device.

As shown in FIG. 1, a general crane includes an engine driving unit 1, a mounting unit 2, and a crane unit 3. The crane portion 3 is a portion that substantially pulls the load. The crane portion 3 is provided with a boom assembly (4).

Referring to FIG. 2, the boom assembly 4 includes a plurality of booms 11, 12, 13, 14, 15, and 16 hydraulic cylinders 21, 22, 23, wires 31, 41, and 50. And withdrawals by the pulleys 32, 42, 51 and 52.

Specifically, in consideration of stability, the boom assembly 4 normally includes the hydraulic cylinders 21, 22, 22, and 24 to the first boom 11, the second boom 12, the third boom 13 and the fourth boom 14, 23 and the fifth boom 15 and the sixth boom 16 are driven by the drive pulleys 32, 42 in a rotating manner without being driven by hydraulic pressure in consideration of their own loads, And is drawn out by the wires 31 and 41.

The operation process will be described in detail as follows. In the boom assembly 4, the second end boom 12 to the sixth end boom 16 are sequentially inserted into the first end boom 11.

The first cylinder 21 is installed between the first step boom 11 and the second step boom. One end of the first rod 211 of the first cylinder 21 is fixed to the first end boom 11, and the first cylinder body 212 of the first cylinder 21 is connected to the second end boom 12. It is fixed.

The second cylinder 22 is installed between the second step boom 12 and the third step boom 13. One end of the second rod 221 of the second cylinder 22 is fixed to the second end boom 12, and the second cylinder body 222 of the second cylinder 22 is attached to the third end boom 13. It is fixed. The tip portion of the second rod 221 communicates with the tip portion of the first cylinder body 212.

A third cylinder 23 is installed between the third step boom 13 and the fourth step boom 14. One end of the third rod 231 of the third cylinder 23 is fixed to the third end boom 13, and the third cylinder body 223 of the third cylinder 23 is fixed to the fourth end boom 14. do. The tip end of the third rod 23 communicates with the tip end of the second cylinder body 223.

When the hydraulic pressure is applied to the inside of the first cylinder 21, the first rod 211 protrudes from the first cylinder body 212, the first cylinder body 212 moves to the right, the first cylinder body 212 The second step boom 12 is fixedly protruded from the first step boom 11 is drawn out.

At this time, the second cylinder 22 installed between the second step boom 12 and the third step boom 13 is moved in accordance with the withdrawal operation of the second step boom 12, and then the first rod of the first cylinder 21 ( When 211 is completely protruded, the hydraulic pressure is applied to the second cylinder body 222 to start the protruding operation. That is, in the operation of the second cylinder 22, the hydraulic pressure is applied into the first cylinder 21 so that the first rod 211 protrudes, and the first cylinder body 212 moves to move the first rod 211. When the protrusion is completed, the hydraulic pressure introduced into the first cylinder 21 flows into the second cylinder body 222 of the second cylinder 22 through the tip of the second rod 221 of the second cylinder 22. As the second rod 221 of the second cylinder 22 protrudes, the third end boom 13 moves to the right to be withdrawn.

Similarly, the third cylinder 23 installed between the third step boom 13 and the fourth step boom 14 is moved in accordance with the withdrawal operation of the third step boom 13 and then the second rod 221 of the second cylinder 22. At the point where) is completely projected, the projecting operation starts.

In the protruding motion of the third cylinder 23, the hydraulic pressure is applied into the second cylinder 22 so that the second rod 221 protrudes, so that the second cylinder body 222 is moved to the right, and then the second rod 221 At the time when the protrusion of the cylinder is completed, the hydraulic pressure introduced into the second cylinder body 222 flows into the third cylinder body 232 through the tip of the third rod 231 of the third cylinder 23, thereby allowing the third cylinder ( As the third rod 231 of 23 is protruded from the third cylinder body 232, the fourth end boom 14 protrudes to the right and is drawn out.

In this way, the second, third and fourth stage booms 12, 13 and 14 are protruded by the first, second and third cylinders 21, 22 and 23.

On the other hand, the 5th step boom 15 and the 6th step boom 16 are pulled out by a wire and a pulley regardless of a cylinder apparatus.

The withdrawal of the fifth step boom 15 is performed as follows. One end of the third end boom 13 and one end of the fifth end boom 15 are connected to the first wire 31 for withdrawal, and the first wire 31 for withdrawal is hooked on the fourth end boom 14. A pull-out first pulley 32 is provided. When the fourth step boom 14 is pulled out by the third cylinder 23, the fifth pull boom 15 is pulled out while the first pulley 32 for pulling out installed in the fourth step boom 14 moves to the right.

The withdrawal of the sixth step boom 16 is performed as follows. One end of the fourth step boom 14 and one end of the sixth step boom 16 are connected to each other by the second wire 41 for pulling out, and the second wire 42 for pulling out hangs on the fifth step boom 15. A pulley second pulley 42 is provided. When the fifth step boom 15 is drawn out as described above, the sixth step boom 16 is drawn out while the second pulley 42 for drawing is moved to the right.

As a result, in the cram boom assembly, the withdrawal operation is performed by the second stage boom 12 starting the withdrawal operation by the first cylinder 21, wherein the third stage boom to the sixth stage boom 13, 14, 15, 16 Is stationary. Subsequently, when the third step boom 13 starts to be drawn out by the second cylinder 22, the fourth to sixth step booms 14, 15, and 16 are in a stopped state. In addition, when the fourth step boom 14 is drawn out by the third cylinder 23, the fifth step boom 15 and the sixth step boom 16 are simultaneously drawn out.

On the other hand, in the conventional claim boom assembly according to the configuration as described in the sequential pulling process of each boom as follows.

One end of the fourth end boom 14 and one end of the sixth end boom 16 are connected to each other by the wire 50 for the inlet, and the wire for the inlet 50 is installed in the third cylinder 23. It is guided by the 1st pulley 51 and the 2nd pulley 52 for drawing provided in the 2nd cylinder 22. As shown in FIG.

When the first rod 211 of the first cylinder 21 is inserted into the first cylinder body 212, the second step boom 12 to which the first cylinder body 212 is fixed is moved into the first step boom 11. It is pulled in.

At the time when the second step boom 12 is completely inserted into the first step boom 11, the second rod 221 of the second cylinder 22 is operated so that the third step boom 13 moves to the second step boom 12. ) Is drawn inside.

When the third step boom 13 is completely inserted into the second step boom 12, the third rod 231 of the third cylinder 23 starts to insert the fourth step boom 14. This third step boom 13 is inserted into the interior.

At this time, as the third cylinder body 232 of the third cylinder 23 is moved to the left side, the first pulley 51 for pulling installed in the third cylinder body 232 is moved to the left side, so that the citation wire 50 is used. While pulling the sixth step boom (16).

The retracting operation of the third cylinder 23 causes the pulling wire 50 to be pulled together with the operation of inserting the fifth and sixth booms 15 and 16 into the fourth and fifth booms 14 and 15, respectively, The boom 16 is inserted into the fifth boom 15 and the incoming wire 50 fixed to the fifth boom 15 is pulled by the insertion operation of the fifth boom 15, And the fifth and sixth boom (15, 16) are inserted into the fourth and fifth boom (14, 15), respectively, while pushing the first pulley (32)

As described above, the conventional crane boom assembly sequentially draws out and pulls in the first, second, third and fourth booms by the cylinder device, and thus the time required for drawing and drawing is increased, thus increasing the use of fuel as the working time increases. there is a problem.

The present invention has been made to solve the above problems, and at the time of withdrawal and withdrawal of the boom assembly, by simultaneously operating the withdrawal boom to shorten the withdrawal and withdrawal time, it is possible to reduce the use of fuel in accordance with the reduction of working time It is an object of the present invention to provide a crane boom assembly drive device.

Simultaneous draw-out crane boom assembly according to the present invention for solving the above problems, the main boom and the boom assembly driving apparatus of the crane having a plurality of pull-out boom coupled to the inside of the main boom retractable In the main boom, when the first draw-out boom to the N-th draw-out boom (N is a natural number of 3 or more) sequentially inserted into the main boom, to draw the first draw-out boom from the main boom, A first cylinder having a first rod to be fixed and a first cylinder body inserted into and out of the first rod and fixed to the first draw-out boom; A first control unit providing a working fluid to the first cylinder to control the appearance of the first rod; A second rod fixed to the first draw-out boom and a second cylinder body fixed to the second draw-out boom so as to draw in and out a second draw-out boom from the first draw-out boom; A second cylinder having a; A third rod fixed to the second drawout boom and a third cylinder inserted into and out of the second drawout boom so as to draw in and out the third drawout boom from the second drawout boom; A third cylinder having a body; And a second control unit operating simultaneously with the first control unit so that the first and third cylinders operate simultaneously to provide a working fluid to the third cylinder to control the appearance of the third rod. .

In addition, a first wire having one end coupled to the second take-out boom and the other end coupled to the fourth take-out boom; A first pulley installed on the third draw-out boom and walking on the first wire; A second wire having one end coupled to the third drawout boom and the other end coupled to the fifth drawout boom; A second pulley installed on the fourth take-out boom and guiding the second wire by walking; A third wire having one end coupled to the fifth takeout boom and the other end coupled to the third takeout boom; A third pulley installed on the third cylinder body and guiding the third wire by walking; And a fourth pulley installed on the second cylinder body and guiding the third wire by walking.

The boom assembly driving device of the crane according to the present invention, at the time of withdrawal and withdrawal of the boom assembly, simultaneously operates the withdrawal boom to shorten the withdrawal and withdrawal time, and provides the effect of reducing the fuel use according to the shortening of the working time.

1 is a schematic side view of a conventional crane,
2 is a cross-sectional view of the crane boom assembly employed in FIG.
Figure 3 is a cross-sectional view of a crane boom assembly capable of simultaneous pull-out according to an embodiment of the present invention.

Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the accompanying drawings.

First, the simultaneous pull-out crane boom assembly according to an embodiment of the present invention is to be able to take out the boom assembly at the same time. Specifically, the boom assembly generally operates a main boom, a plurality of draw-out booms which are coupled to the inside of the main boom so as to be drawable, a cylinder device which draws in and out some of the draw-out booms, and the rest of the draw-out booms. And a pulley to which the wires are wound, the pulley being pulled out of the main boom and simultaneously withdrawable from the main boom assembly.

Figure 3 is a cross-sectional view of a crane boom assembly capable of simultaneous pull-out according to an embodiment of the present invention.

Referring to FIG. 3, the crane boom assembly which can be simultaneously pulled out according to an embodiment of the present invention includes a first cylinder 210, a second cylinder 220, a third cylinder 230, a first control unit 600, and The second control unit 700 is included.

Simultaneous withdrawable crane boom assembly according to an embodiment of the present invention is to draw in and out the main boom 100 and a plurality of draw-out booms that are sequentially inserted into the main boom 100, the main boom 100 The first draw-out boom 101 to the N-th draw-out boom (N is a natural number of 3 or more) are inserted. Referring to FIG. 3, the crane boom assembly capable of simultaneous take-out according to the present embodiment shows a form in which five draw-out booms are inserted into the main boom 100.

The first cylinder 210 is provided to draw in and out the first draw-out boom 101 from the main boom 100. The first cylinder 210 includes a first rod 201 and a first cylinder body 202.

One end of the first rod 201 is fixed to the main boom 100, and the first rod 201 is inserted into the first cylinder body 202 and coupled to the first boom 201. The first cylinder body 202 is fixed to the first draw-out boom 101. In this embodiment, one end of the first cylinder body 202 is fixed to the front end of the first draw-out boom 101.

When the first rod 201 of the first cylinder 210 protrudes from the first cylinder body 202, the first draw-out boom 101 is withdrawn from the main boom 100, and the first rod 201 ) Is inserted into the first cylinder body 202, the first draw-out boom 101 is drawn into the main boom 100.

The second cylinder 220 is provided to draw in and out the second draw-out boom 102 from the first draw-out boom 101. The second cylinder 220 includes a second rod 203 and a second cylinder body 204.

The second rod 203 is fixed to the first draw-out boom 101 and is inserted into the second cylinder body 204 so as to be attached and detached. The second cylinder body 204 is fixed to the second draw-out boom 102. In this embodiment, one end of the second cylinder body 204 is fixed to the front end of the second draw-out boom 102.

When the second rod 203 of the second cylinder 220 protrudes from the second cylinder body 204, the second draw-out boom 102 is withdrawn from the first draw-out boom 101, and the second rod When 203 is inserted into the second cylinder body 204, the second draw-out boom 102 is drawn into the first draw-out boom 101.

The third cylinder 230 operates simultaneously with the first cylinder 210. The third cylinder 230 is provided to draw in and out the third draw-out boom 103 from the second draw-out boom 102. The second cylinder 230 includes a third rod 205 and a third cylinder body 206.

The third rod 205 is fixed to the second take-out boom 102 and is inserted into the third cylinder body 206 is coupled to be retractable. The third cylinder body 206 is fixed to the third inlet / In this embodiment, one end of the third cylinder body 206 is fixed to the front end of the third draw-out boom 103.

When the third rod 205 of the third cylinder 230 protrudes from the third cylinder body 206, the third drawout boom 103 protrudes from the second drawout boom 102, and the third When the rod 205 is inserted into the third cylinder body 206, the third drawout boom 103 is drawn into the second drawout boom 102.

Simultaneous withdrawable crane boom assembly according to an embodiment of the present invention by the first and second controllers 600 and 700, the first and third cylinders 210 and 230 simultaneously operate to improve the take-out speed of the boom assembly.

The first control unit 600 controls the appearance of the first rod 201 by providing a working fluid to the first cylinder 210.

The second control unit 700 operates simultaneously with the first control unit 600 to simultaneously operate the first and third cylinders 210 and 230 to provide a working fluid to the third cylinder 230. 3 The appearance of the rod 205 is controlled. For example, in the process of drawing out the boom assembly, when the first rod 201 of the first cylinder 210 protrudes from the first cylinder body 202 by the first control unit 600, the second control unit ( 700 allows the third rod 205 of the third cylinder 230 to protrude from the third cylinder body 206.

Therefore, since the first draw-out boom 101 is withdrawn from the main boom 100 and the third draw-out boom 103 is withdrawn from the second draw-out boom 102, the spring assembly can be withdrawn at a high speed. Similar to the withdrawal process, it can be withdrawn at a high speed.

Meanwhile, the crane boom assembly which can be simultaneously pulled out according to the embodiment of the present invention includes a first wire 310, a first pulley 311, a second wire 410, a second pulley 411, and a third wire 510. ), A third pulley 511, and a fourth pulley 512.

The first wire 310 is provided to draw the fourth draw-out boom 104 from the third draw-out boom 103. One end of the first wire 310 is coupled to the second draw-out boom 102 and the other end is coupled to the fourth draw-out boom 104.

The first pulley 311 is provided to guide the first wire 310 by walking. The first pulley 311 is installed in the third draw-out boom 103. In this embodiment, the first pulley 311 is disposed at the end of the third draw-out boom 103.

The second wire 410 is provided to draw the fifth draw-out boom 105 from the fourth draw-out boom 104. One end of the second wire 410 is coupled to the third draw-out boom 103 and the other end is coupled to the fifth draw-out boom 105.

The second pulley 411 is provided to guide the second wire 410 by walking. The second pulley 411 is installed in the fourth draw-out boom 104. In this embodiment, the second pulley 411 is disposed at the end of the fourth draw-out boom 104.

The third wire 510 is provided to lead the fifth draw-out boom 105 into the fourth draw-out boom 104. One end of the third wire 510 is coupled to the fifth draw-out boom 105 and the other end is coupled to the third draw-out boom 103.

The third pulley 511 and the fourth pulley 512 are provided to walk the third wire 510. The third pulley 511 is installed on the third cylinder body 206, and the fourth pulley 512 is installed on the second cylinder body 204. In this embodiment, the third wire 510 extends from one end of the fifth draw-in / out boom 105, is first wound on the third pulley 511 and extends toward the fifth draw-in / out boom 105, And is wound on the pulley 512 and then extends in the direction toward the main boom 100 and fixed to the third loading / unloading boom 103.

Hereinafter, the operation of the crane boom assembly driving apparatus according to the above construction will be described in detail.

First, a process of drawing out a plurality of draw-out booms from the main boom 100 will be described.

Since the first and third cylinders 210 and 220 according to the present exemplary embodiment operate simultaneously by the first and second controllers 600 and 700, the first draw-out boom 101 is withdrawn from the main boom 100 and at the same time with the third withdrawal. The mouth boom 103 is withdrawn from the second draw-out boom 102.

Specifically, when the first control unit 600 provides a working fluid to the first cylinder 210 so that the first rod 201 of the first cylinder 210 protrudes from the first cylinder body 202, the first cylinder 600 is provided. The cylinder body 202 moves to the right side and the first draw-out boom 101 coupled to the first cylinder body 202 is withdrawn from the main boom 100. When the third control unit 700 provides the working fluid to the third cylinder 230 so that the third rod 205 of the third cylinder 230 protrudes from the third cylinder body 206, the third cylinder body 206 is moved to the right and the third draw-out boom 103 coupled to the third cylinder body 206 is drawn out from the second draw-out boom 102.

On the other hand, the second cylinder 220 operates sequentially when the operation of the first cylinder 210 is completed. Specifically, when the first rod 201 of the first cylinder 210 is completely protruded, hydraulic pressure is applied to the second cylinder body 204 so that the protruding operation of the second rod 203 proceeds.

Next, the withdrawal process of the fourth draw-out boom 104 and the fifth draw-out boom 105 will be described.

When the third draw-out boom 103 is pulled out from the second draw-out boom 102 by the third cylinder 230, the fourth draw-out boom 104 and the fifth draw-out boom 105 are simultaneously drawn out.

When the third draw-out boom 103 is pulled out, the first pulley 311 coupled to the end of the third draw-out boom 103 moves to the right. One end of the first wire 310 hanging on the first pulley 311 is connected to the second draw-out boom 102 and the other end is connected to the fourth draw-out boom 104. Therefore, since the length of the first wire 310 is constant, when the first pulley 311 moves to the right, the position of the coupling point where the first wire 310 is connected to the fourth draw-out boom 104 moves to the right. Since it is moved, the fourth draw-out boom 104 is drawn out from the third draw-out boom 103.

When the fourth draw-out boom 104 is pulled out from the third draw-out boom 103, the second pulley 411 coupled to the end of the fourth draw-out boom 104 moves to the right. The second wire 410 hanging on the second pulley 411 has one end connected to the third draw-out boom 103 and the other end connected to the fifth draw-out boom 105. Since the length of the second wire 410 is constant, when the second pulley 411 is moved to the right, the position of the coupling point connected to the fifth pull-out boom 105 is moved to the right. Therefore, the fifth draw-out boom 105 is withdrawn from the fourth draw-out boom 104.

As described above, the fourth draw-out boom 104 and the fifth draw-out boom 105 have the third draw-out boom 103 and the third draw-out boom 102 at the same time that the second draw-out boom 102 is withdrawn. Will be withdrawn.

On the other hand, crane boom assembly capable of simultaneous pull-out according to the embodiment of the present invention is drawn through the following process.

When the first rod 201 of the first cylinder 210 is inserted into the first cylinder body 202, the first draw-out boom 101 is drawn into the main boom 100. Similar to the drawing process, when the third rod 205 of the third cylinder 230 is inserted into the third cylinder body 206 simultaneously with the operation of the first cylinder 210, the third drawing-out boom 103 is second drawn out. It is drawn into the interior of the mouth boom 102. Meanwhile, after the drawing operation by the first cylinder 210 is completed, the second cylinder 220 is operated so that the second drawing-out boom 202 is drawn into the first drawing-out boom 101.

On the other hand, the fourth draw-out boom 104 and the fifth draw-out boom 105 is drawn in by the following process. When the third rod 205 of the third cylinder 230 is inserted into the third cylinder body 206, the third pulley 511 coupled to the third cylinder body 206 is moved to the right to the fifth take-out boom ( 105 is pulled out so that the fifth draw-out boom 105 is drawn into the fourth draw-out boom 104. At this time, the second pulley 411 is pulled while the coupling point of the second wire 410 coupled to the fifth draw-out boom 105 is moved to the left so that the fourth draw-out boom 104 is the third draw-out boom 103. It is pulled in.

As described above, the crane boom assembly which can be simultaneously pulled out according to the embodiment of the present invention is the second withdrawal of the third withdrawal boom 103 simultaneously with the operation of withdrawing or withdrawing the first withdrawal boom 101 from the main boom 100. By drawing out or pulling out from the mouth boom 102, it reduces the time required to take out and pull out each boom constituting the boom assembly to improve the work efficiency, and provides an effect that can reduce the use of fuel in accordance with the reduction of working time .

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, and many modifications may be made without departing from the scope of the present invention.

100 ... Main boom 101 ... First draw-out boom
102 ... The second draw-out boom 103 ... The third draw-out boom
104 ... The fourth draw-out boom 105 ... The fifth draw-out boom
210 ... first cylinder 201 ... first rod
202 ... first cylinder body 220 ... second cylinder
203 ... 2nd rod 204 ... 2nd cylinder body
230 ... Third cylinder 205 ... Third rod
206 ... third cylinder body 310 ... first wire
311 ... 1st pulley 410 ... 2nd wire
411 ... 2nd pulley 510 ... 3rd wire
511 ... 3rd Pulley 512 ... 4th Pulley
600 ... first control unit 700 ... second control unit

Claims (2)

In the boom assembly driving apparatus of the crane having a main boom and a plurality of pull-out boom coupled to the inside of the main boom releasable,
When the first draw-out boom 101 to the N-th draw-out boom (N is a natural number of 3 or more) are sequentially inserted into the main boom 100,
The first rod 201 fixed to the main boom 100 and the first rod 201 are inserted into and out of the main boom 100 so as to draw in and out the first draw-out boom 101 from the main boom 100. A first cylinder 210 having a first cylinder body 202 fixed to the first draw-out boom 101;
A first control unit 600 which provides a working fluid to the first cylinder 210 to control the appearance of the first rod 201;
The second rod 203 fixed to the first draw-out boom 101 and the second rod 203 are inserted to draw in and draw out the second draw-out boom 102 from the first draw-out boom 101. A second cylinder (220) having a second cylinder body (204) fixed to the second draw-out boom (102) to be released;
The third rod 205 fixed to the second draw-out boom 102 and the third rod 205 are configured to draw in and draw out the third draw-out boom 103 from the second draw-out boom 102. A third cylinder (230) having a third cylinder body (206) inserted into and exiting from and fixed to the third drawout boom (103); And
The first and third cylinders 210 and 230 operate simultaneously with the first control unit 600 to provide a working fluid to the third cylinder 230 to control the appearance of the third rod 205. Simultaneous draw-out crane boom assembly comprising a; second control unit (700). The method of claim 1,
A first wire 310 having one end coupled to the second drawout boom 102 and the other end coupled to the fourth drawout boom 104;
A first pulley 311 installed in the third drawout boom 103 and guiding the first wire 310 by walking;
A second wire 410 having one end coupled to the third draw-out boom 103 and the other end coupled to the fifth draw-out boom 105;
A second pulley 411 installed on the fourth draw-out boom 104 and guiding the second wire 410 by walking;
A third wire having one end coupled to the fifth draw-out boom 105 and the other end coupled to the third draw-out boom 103;
A third pulley 511 installed on the third cylinder body 206 to guide the third wire 510 by walking;
And a fourth pulley (512) installed on the second cylinder body (204) for walking and guiding the third wire (510).
KR1020120022414A 2012-03-05 2012-03-05 Simultaneous operable crane boom assembly KR20130101344A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102071662B1 (en) 2019-07-04 2020-04-01 주식회사 금명특장 cylinder assembly for a crane
KR20210049019A (en) 2020-11-13 2021-05-04 (주) 대 홍 Winch crane with elastic support for multi-stage boom
KR20210049030A (en) 2021-01-25 2021-05-04 연 태 최 Winch crane with support and buffer and excellent corrosion resistance

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102071662B1 (en) 2019-07-04 2020-04-01 주식회사 금명특장 cylinder assembly for a crane
KR20210049019A (en) 2020-11-13 2021-05-04 (주) 대 홍 Winch crane with elastic support for multi-stage boom
KR20210049030A (en) 2021-01-25 2021-05-04 연 태 최 Winch crane with support and buffer and excellent corrosion resistance

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