CN112408218A - Counterweight system for crane and crane - Google Patents
Counterweight system for crane and crane Download PDFInfo
- Publication number
- CN112408218A CN112408218A CN202011291293.5A CN202011291293A CN112408218A CN 112408218 A CN112408218 A CN 112408218A CN 202011291293 A CN202011291293 A CN 202011291293A CN 112408218 A CN112408218 A CN 112408218A
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- crane
- counterweight
- mast
- rotary table
- support bar
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- 230000007246 mechanism Effects 0.000 claims abstract description 67
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000002708 enhancing effect Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000001154 acute effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003028 elevating effect Effects 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
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Classifications
-
- 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
- B66C23/72—Counterweights or supports for balancing lifting couples
- B66C23/74—Counterweights or supports for balancing lifting couples separate from jib
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Jib Cranes (AREA)
Abstract
The invention discloses a counterweight system for a crane and the crane, belonging to the technical field of crane counterweights, wherein the counterweight system comprises a support frame; the bottom end of the support frame is fixedly arranged on the rotary table, and the top end of the support frame is connected with a mast connected to the rotary table through a mast amplitude-changing mechanism; the top end of the support frame is also connected with a group of balance weights through a balance weight connecting mechanism, and the balance weights are connected to the tail part of the rotary table through a balance weight amplitude varying mechanism. The invention can improve the stress state of the rotary table, the mast and the slewing bearing and enhance the arm lifting capacity and the hoisting capacity of the crane.
Description
Technical Field
The invention relates to the technical field of hoisting of engineering machinery cranes, in particular to a counterweight system for a crane and the crane.
Background
According to construction requirements, the crane is generally provided with a standard working condition and a super-lift working condition. Fig. 2 is a schematic structural diagram of a crane in a standard working condition state in the prior art, the standard working condition has the characteristics of low investment cost, convenience in disassembly and assembly, high efficiency and the like compared with a super-lift working condition, and the length and the hoisting weight performance of a boom of the standard working condition have higher requirements on a mast, a turntable and a slewing bearing. When the capacities of the mast, the rotary table and the slewing bearing are not enough to meet the requirements, the length of the arm support under the standard working condition and the hoisting performance can be effectively improved by adding the rotary table counterweight at the tail of the rotary table.
In the aspect of enhancing the performance of a crane and the hoisting capacity of a lifting arm, the prior art is mainly realized by the following four schemes:
the first technical scheme is as follows: a suspension type balance weight is added on the rear side of the tail of the rotary table, so that the length and the performance of the arm support under the standard working condition are improved;
the second prior art scheme is: the support legs are laterally added to the crawler, the tipping line of the whole machine is increased, and the length of the standard working condition arm support is increased;
the third prior art scheme is as follows: the herringbone frame structure is arranged, the stress state of the mast is improved, and the length and the hoisting performance of the arm frame under the standard working condition are improved;
the prior art scheme is four: an independent counterweight system is arranged behind the rotary table, so that the anti-tipping capacity is improved, the stress state of the rotary table and the slewing bearing is improved when the arm is lifted and the weight is lifted, and the length and the weight lifting performance of the arm support under standard working conditions are improved.
However, the prior art has some objective defects: on one hand, the disassembly and the assembly are time-consuming and labor-consuming, and on the other hand, the rotary table structure and the slewing bearing have side effects. When the rotary table or the rotary support reaches the limit of bearing the rotary table counterweight, the arm length and the performance of the crane reach the limit under the standard working condition, and if the rotary table counterweight is increased again, the damage to the rotary table structure or the rotary support can be caused. Therefore, how to improve the performance of the standard working condition of the crane is an important direction for current research.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a counterweight system for a crane and the crane, which can improve the overall stability of the crane and enhance the lifting arm and hoisting capacity of the crane.
In order to achieve the purpose, the invention is realized by adopting the following technical scheme:
in a first aspect, the present invention provides a counterweight system for a crane, the system comprising a support frame;
the bottom end of the support frame is fixedly arranged on the rotary table, and the top end of the support frame is connected with a mast hinged on the rotary table through a mast amplitude-changing mechanism;
the top of support frame is connected with a set of counter weight through counter weight coupling mechanism, the counter weight through the counter weight luffing mechanism connect in the revolving stage afterbody.
Furthermore, the top end of the mast is connected to the head of the arm support through a pulling plate, and the bottom end of the mast is hinged to the front part of the rotary table.
Furthermore, the support frame comprises a first support rod and a second support rod, the top end of the first support rod is hinged to the top end of the second support rod, the bottom end of the first support rod is fixedly connected with the tail end of the rotary table, and the bottom end of the second support rod is fixedly arranged between the tail end and the front end of the rotary table.
Furthermore, a connecting line between the other end of the first supporting rod and the other end of the second supporting rod and the first supporting rod form an obtuse angle structure.
Further, the counterweight is connected to the counterweight luffing mechanism through a lifting mechanism. .
Further, the mast luffing mechanism or the counterweight connecting mechanism or the counterweight luffing mechanism is a connecting mechanism capable of adjusting the length.
Further, the balance weight connecting mechanism is a connecting mechanism with a fixed length.
Furthermore, the mast amplitude-changing mechanism and the counterweight amplitude-changing mechanism are oil cylinders, rope rows or pulley blocks.
Further, the balance weight connecting mechanism is a pulling plate, a chain or a pulling cable.
In a second aspect, the present invention provides a crane comprising a counterweight system according to any one of the first aspect.
Compared with the prior art, the invention has the following beneficial effects:
the invention utilizes the counterweight luffing mechanism to connect the counterweight to the tail part of the rotary table, transmits the stress to the rotary table, and is connected with the mast and the arm support through the mast luffing mechanism, the counterweight connecting mechanism and the support frame, thereby changing the stress state of the rotary table, enhancing the stability of the crane, and further improving the crane jib lifting and hoisting capacity;
the distance between the counterweight luffing mechanism and the rotary table is adjusted, so that the anti-tipping moment capacity of the crane is enhanced, and the stability, the arm lifting capacity and the weight hanging capacity of the crane are improved;
the mast luffing mechanism and the counterweight connecting mechanism are set to be connecting mechanisms with adjustable lengths, so that the connecting structure of the counterweight system can be flexibly adjusted, the stress condition of the rotary table is adjusted, and the stability, the arm lifting capability and the weight hoisting capability of the crane are improved.
Drawings
FIG. 1 is a schematic structural diagram of a counterweight system for a crane according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a standard working condition of a crane in the prior art;
in the figure:
1. a crawler belt; 2. a boom; 3. a turntable; 4. a mast; 5. a support frame; 6. a mast luffing mechanism; 7. a balance weight connecting mechanism; 8. a counterweight luffing mechanism; 9. a counterweight; 10. a first support bar; 11. a second support bar; 12. and (5) pulling the plate.
Detailed Description
The invention is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The first embodiment is as follows:
as shown in fig. 1, an embodiment of the present invention provides a counterweight system for a crane, which achieves the purposes of improving the stability of the crane under standard conditions and enhancing the crane jib and hoisting capacity by improving the stress conditions of a mast 4, a rotary table 3 and a slewing bearing, wherein the slewing bearing is a device in which the rotary table is connected with a lower crane body of the crane.
In the present embodiment, the counterweight system includes a support frame 5 fixedly disposed on the turntable 3, and the support frame 5 is in a chevron shape and mainly includes a first support rod 10 and a second support rod 11. One end of the first supporting rod 10 is hinged to one end of the second supporting rod 11, and the first supporting rod 10 and the second supporting rod 11 are arranged at the tail of the rotary table 3 and the rotary table 3 respectively in an included angle.
Specifically, as shown in fig. 1, the other end of the first support rod 10 is fixedly connected to the tail end of the turntable 3, the other end of the second support rod 11 is fixedly connected between the tail end and the front end of the turntable 3, and an included angle structure formed by a connecting line between the other end of the first support rod 10 and the other end of the second support rod 11 and the first support rod 10 may be an obtuse angle, a right angle, an acute angle, or other structures.
As an embodiment of the present invention, in order to better improve the stress state, a connection line between the other end of the first support bar 10 and the other end of the second support bar 11 forms an obtuse angle structure with the first support bar 10, so that the hinged ends of the first support bar 10 and the second support bar 11 can protrude away from the trailing edge of the turntable 3.
It should be noted that the specific structural examples of the first support bar 10 and the second support bar 11 are only for describing the principle of the technical solution of the present invention, and the present invention is not limited herein as long as the function of the technical solution provided by the present invention can be achieved.
The hinged end of support frame 5 is connected with mast 4 connected on revolving stage 3 through mast luffing mechanism 6, and simultaneously, the hinged end of support frame 5 still connects in a set of balanced heavy coupling mechanism 7 and balances heavy 9, it connects in the 3 tails of revolving stage to balance heavy 9 through balanced heavy luffing mechanism 8, balanced heavy luffing mechanism 8 can adjust length to make the balanced heavy 9 that sets up on balanced heavy luffing mechanism 8 keep away from or be close to the 3 tails of revolving stage, and then change mast 4, revolving stage 3 and slewing bearing's stress state.
Through the structural connection of the mast amplitude-changing mechanism 6, the balance weight connecting mechanism 7, the balance weight amplitude-changing mechanism 8 and the support frame 5, the stress state of the rotary table 3 can be improved, the stability of the crane is enhanced, and the crane arm lifting and hoisting capacity is further improved.
As an embodiment of the present invention, in order to make the crane more stable, the top end of the mast 4 is connected to the top of the arm support 2 through a pulling plate 12, and the bottom end of the mast 4 is hinged to the front part of the rotary table.
As an embodiment of the invention, the counterweight 9 is connected to the counterweight luffing mechanism 8 by means of a lifting mechanism. Through adjusting elevating system, can place balance weight 9 on ground or lift liftoff according to the in service behavior to avoid leading to the fact the damage to revolving stage 3 and support frame 5 etc. under uncomfortable operational environment. Wherein, the lifting mechanism is a device with variable amplitude or length, such as an oil cylinder, a rope row, a pulley block and the like.
In this embodiment, the counterweight attachment mechanism 7 may be a fixed length attachment mechanism or device, such as a pulling plate, chain, cable, or the like. The balance weight 9 can be sufficiently landed or lifted by using the balance weight connecting mechanism 7 and a lifting device such as a lifting mechanism in a matching way.
As an embodiment of the invention, the mast luffing mechanism 6 and/or the counterweight connecting mechanism 7 are length-adjustable connecting mechanisms or devices with a length-changing function. Specifically, the mast luffing mechanism 6 and the balance weight connecting mechanism 7 can be oil cylinders, rope rows, pulley blocks and the like, and the stress state of the connecting structure is changed by adjusting the length, so that the stability and the lifting capacity of the crane can be adjusted.
It should be noted that the counterweight 9, the counterweight luffing mechanism 8, the support frame 5, the mast luffing mechanism 6, the counterweight connecting mechanism 7, the mast 4 and the boom 2 can be approximately in the same plane, so that the stress state of the rotary table 3, the mast 4 and the slewing bearing can be improved, and the stability of the crane and the hoisting capacity of the crane can be improved.
In the embodiment, the counterweight 9 increases the anti-tipping moment of the whole crane, and when the amplitude varying device varies the amplitude of the counterweight 9 in the direction far away from the turntable 3, the capacity of the counterweight 9 for resisting the anti-tipping moment of the whole crane is correspondingly increased;
the gravity of the balance weight 9 acts on the support frame 5 through the balance weight connecting mechanism 7 and is mainly used for counteracting the pulling force transmitted by the mast amplitude varying mechanism 6;
the counterweight luffing mechanism 8 axially transmits the gravity of the counterweight 9 to the rotary table 3, so that the condition that the force vertically acts on the rotary table 3 in the existing scheme is changed, and the stress state of the rotary table 3 is improved;
the top of the support frame 5 is hinged, the hinged part is connected with the mast 4 through the mast amplitude-changing mechanism 6, and compared with the prior art that the mast 4 is directly arranged on the tail part of the rotary table 3 through the connecting mechanism, the mast amplitude-changing mechanism 6 is arranged on the tail part of the rotary table 3 through the first support rod 10, the height of the mast amplitude-changing mechanism 6 is increased to be higher than that of the rotary table 3, the included angle between the mast amplitude-changing mechanism 6 and the mast 4 is changed, and the stress state of the mast 4 is improved.
Example two:
the embodiment of the invention provides a crane, which comprises the counterweight system in the first embodiment, and the crane has high stability, strong arm lifting capacity and strong lifting capacity. Specifically, the crane comprises a crawler 1, a crane body, an arm support 2 arranged on the crane body, and the counterweight system described in the first embodiment.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A counterweight system for a crane, said system comprising a support frame;
the bottom end of the support frame is fixedly arranged on the rotary table, and the top end of the support frame is connected with a mast hinged on the rotary table through a mast amplitude-changing mechanism;
the top of support frame is connected with a set of counter weight through counter weight coupling mechanism, the counter weight through the counter weight luffing mechanism connect in the revolving stage afterbody.
2. The counterweight system for crane as claimed in claim 1, wherein the top end of said mast is connected to the head of the arm support by a pulling plate, and the bottom end of said mast is hinged to the front of said turntable.
3. The counterweight system for crane as claimed in claim 1, wherein said support frame comprises a first support bar and a second support bar, a top end of said first support bar is hinged to a top end of said second support bar, a bottom end of said first support bar is fixedly connected to a tail end of said turntable, and a bottom end of said second support bar is fixedly disposed between a tail end and a front end of said turntable.
4. The counterweight system for a crane according to claim 3, wherein a line connecting the other end of said first support bar and the other end of said second support bar forms an obtuse angle structure with said first support bar.
5. The counterweight system for a crane of claim 1 wherein said counterweight is connected to said counterweight luffing mechanism by a lift mechanism. .
6. Counterweight system for a crane according to claim 1, characterized in that the mast luffing mechanism or counterweight luffing mechanism is a length-adjustable linkage.
7. Counterweight system for a crane according to claim 1, characterized in that said counterweight attachment means are attachment means of fixed length.
8. The counterweight system for a crane of claim 1, wherein said mast luffing mechanism and counterweight luffing mechanism are cylinders, rope rows, or pulley blocks.
9. Counterweight system for a crane according to claim 1, characterized in that said counterweight attachment means are pull plates, chains or cables.
10. A crane, characterized in that it comprises a counterweight system according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011291293.5A CN112408218A (en) | 2020-11-18 | 2020-11-18 | Counterweight system for crane and crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011291293.5A CN112408218A (en) | 2020-11-18 | 2020-11-18 | Counterweight system for crane and crane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112408218A true CN112408218A (en) | 2021-02-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011291293.5A Withdrawn CN112408218A (en) | 2020-11-18 | 2020-11-18 | Counterweight system for crane and crane |
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| CN (1) | CN112408218A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113148864A (en) * | 2021-04-28 | 2021-07-23 | 徐工集团工程机械股份有限公司建设机械分公司 | Crane and control method thereof |
| CN113742869A (en) * | 2021-09-28 | 2021-12-03 | 徐工集团工程机械股份有限公司建设机械分公司 | Crane performance improving method |
| CN113800408A (en) * | 2021-09-28 | 2021-12-17 | 徐工集团工程机械股份有限公司建设机械分公司 | Circular rail crane, circular rail crane assembling method and circular rail crane disassembling method |
| WO2024169322A1 (en) * | 2023-02-17 | 2024-08-22 | 徐工集团工程机械股份有限公司建设机械分公司 | Crane |
-
2020
- 2020-11-18 CN CN202011291293.5A patent/CN112408218A/en not_active Withdrawn
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113148864A (en) * | 2021-04-28 | 2021-07-23 | 徐工集团工程机械股份有限公司建设机械分公司 | Crane and control method thereof |
| CN113148864B (en) * | 2021-04-28 | 2024-05-17 | 徐工集团工程机械股份有限公司建设机械分公司 | Crane and control method thereof |
| CN113742869A (en) * | 2021-09-28 | 2021-12-03 | 徐工集团工程机械股份有限公司建设机械分公司 | Crane performance improving method |
| CN113800408A (en) * | 2021-09-28 | 2021-12-17 | 徐工集团工程机械股份有限公司建设机械分公司 | Circular rail crane, circular rail crane assembling method and circular rail crane disassembling method |
| CN113800408B (en) * | 2021-09-28 | 2024-04-16 | 徐工集团工程机械股份有限公司建设机械分公司 | Ring rail crane, ring rail crane assembling method and disassembling method |
| WO2024169322A1 (en) * | 2023-02-17 | 2024-08-22 | 徐工集团工程机械股份有限公司建设机械分公司 | Crane |
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Application publication date: 20210226 |