CN103523682A - Movable arm tower crane - Google Patents

Movable arm tower crane Download PDF

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Publication number
CN103523682A
CN103523682A CN201310537940.XA CN201310537940A CN103523682A CN 103523682 A CN103523682 A CN 103523682A CN 201310537940 A CN201310537940 A CN 201310537940A CN 103523682 A CN103523682 A CN 103523682A
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CN
China
Prior art keywords
arm
crane
tower
counterbalanced weight
equilibrium
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Pending
Application number
CN201310537940.XA
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Chinese (zh)
Inventor
谭泽松
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Zoomlion Heavy Industry Science and Technology Co Ltd
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Zoomlion Heavy Industry Science and Technology Co Ltd
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Filing date
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Application filed by Zoomlion Heavy Industry Science and Technology Co Ltd filed Critical Zoomlion Heavy Industry Science and Technology Co Ltd
Priority to CN201310537940.XA priority Critical patent/CN103523682A/en
Publication of CN103523682A publication Critical patent/CN103523682A/en
Pending legal-status Critical Current

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Abstract

The invention provides a movable arm tower crane which comprises a slewing tower body (10), a crane arm (20) and a balance arm (30). The first end of the crane arm (20) is hinged to the slewing tower body (10), a telescopic mechanism (11) for amplitude variation of the crane arm (20) is arranged between the crane arm (20) and the slewing tower body (10), the first end of the balance arm (30) is arranged on the slewing tower body (10), the balance arm (30) is movably provided with a balance weight (40) in the horizontal direction, the bottom of the crane arm (20) is fixedly connected with a first connection arm (21), the balance weight (40) is connected with a second connection arm (41) extending towards the crane arm (20), and the first connection arm (21) is hinged to the second connection arm (41). The movable arm tower crane is simple in structure and convenient to control, and the service life of the movable arm tower crane can be effectively prolonged.

Description

Arm tower crane
Technical field
The present invention relates to constructional engineering machinery field, in particular to a kind of arm tower crane.
Background technology
The effect of counterbalanced weight is the moment of flexure that tower machine anterior-posterior balance is born to reduce tower body, improves tower body stressed.The counterweight set-up mode of luffing jib tower machine has fixed type and two kinds of movable types at present, fixed type is that counterweight is fixedly mounted on to equilibrium arm tail end, its principle of design be the moment of flexure that leans forward that while making fully loaded work, tower body bears close to zero load, the hypsokinesis moment of flexure that during off working state, tower body bears; Movable type is generally using equilibrium arm chord member as track, and special counterweight travel mechanism is set, the position heavy according to the variation adjustment of movable arm tower crane pitching amplitude.
These two kinds of modes respectively have weak point: for fixed type counterweight, no matter tower machine lifts by crane much load at much work ranges, and how the moment of flexure that leans forward no matter acting on tower body changes.And counterweight remains certain value to making tower body bear larger unbalanced moment to the hypsokinesis moment of flexure of tower body, and unbalanced moment exists larger fluctuation, easily make tower machine premature fatigue destroy, for the complex structure of portable counterweight travel mechanism, need to configure auxiliary power and drive, cost is higher.
Summary of the invention
The present invention aims to provide a kind of arm tower crane, simple in structure, and it is convenient to control, and can effectively extend the life-span of arm tower crane.
To achieve these goals, according to an aspect of the present invention, provide a kind of arm tower crane, having comprised: slewing tower; Crane arm, first end is hinged on slewing tower, is provided with for crane arm being carried out to the telescoping mechanism of luffing between crane arm and slewing tower; Equilibrium arm, first end is arranged on slewing tower, and on equilibrium arm, along continuous straight runs is provided with counterbalanced weight movably; The bottom of crane arm is fixedly connected with the first connecting arm, is connected with the second connecting arm extending towards crane arm on counterbalanced weight, and the first connecting arm and the second connecting arm are hinged.
Further, when telescoping mechanism drives crane arm luffing, the first connecting arm drives the second connecting arm motion, and then realizes the movement of counterbalanced weight along continuous straight runs on equilibrium arm.
Further, telescoping mechanism is telescopic oil cylinder.
Further, the adjustable in length of the first connecting arm and/or the second connecting arm.
Further, counterbalanced weight is slidably disposed on equilibrium arm along the length direction of equilibrium arm.
Further, the two opposite sides correspondence of counterbalanced weight is provided with rolling mechanism, and by rolling mechanism, the length direction along equilibrium arm is rollably arranged on equilibrium arm counterbalanced weight.
Further, rolling mechanism comprises: bearing pin, be fixedly connected on the sidewall of counterbalanced weight, and along the direction horizontal-extending of counterbalanced weight; And roller, be set on bearing pin rotationally.
Further, the outer end of bearing pin is fixedly installed baffle plate, and baffle plate is for limiting moving axially of roller.
Further, be also provided with antifriction-bearing box between the inner ring of roller and bearing pin, be also provided with sleeve between antifriction-bearing box and counterbalanced weight, jacket casing is located on bearing pin, is also provided with axle sleeve between sleeve and antifriction-bearing box.
Further, the inner side of equilibrium arm is provided with guide rail, and counterbalanced weight is arranged on guide rail.
Further, guide rail is tilted to downward-extension along the direction near crane arm.
Apply technical scheme of the present invention, arm tower crane comprises slewing tower; Crane arm, first end is hinged on slewing tower, is provided with for crane arm being carried out to the telescoping mechanism of luffing between crane arm and slewing tower; Equilibrium arm, first end is arranged on slewing tower, and on equilibrium arm, along continuous straight runs is provided with counterbalanced weight movably; The bottom of crane arm is fixedly connected with the first connecting arm, is connected with the second connecting arm extending towards crane arm on counterbalanced weight, and the first connecting arm and the second connecting arm are hinged.When tower crane is worked, can control crane arm by telescoping mechanism and carry out luffing, simple in structure, it is convenient to control, and can simplify the structure of tower crane.In the process of crane arm luffing, the first connecting arm can drive the second connecting arm motion, and drive counterbalanced weight to move by the second connecting arm, make crane arm when minimum work range, the moment that counterbalanced weight produces is also minimum, and crane arm is when maximum functional amplitude, the moment that counterbalanced weight produces is also maximum, and in the process of adjusting in crane arm amplitude, the moment of counterbalanced weight can be adjusted thereupon accordingly, makes counterbalanced weight and crane arm realize dynamical equilibrium.The dependence crane arm self gravitation that telescoping mechanism produces in the time of can preventing better counterbalanced weight and crane arm moment balance cannot luffing or the problem of luffing difficulty, improves the luffing efficiency of crane arm.
Accompanying drawing explanation
The accompanying drawing that forms a part of the present invention is used to provide a further understanding of the present invention, and schematic description and description of the present invention is used for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 shows the structural representation of arm tower crane when maximum functional amplitude according to an embodiment of the invention;
Fig. 2 shows the structural representation of arm tower crane when minimum work range according to an embodiment of the invention;
Fig. 3 shows the crane arm of arm tower crane and the fit structure schematic diagram of equilibrium arm according to an embodiment of the invention;
Fig. 4 shows the perspective view at the connection location place of the crane arm of arm tower crane according to an embodiment of the invention;
Fig. 5 shows the crane arm of arm tower crane and the three-dimensional fit structure schematic diagram of equilibrium arm according to an embodiment of the invention;
Fig. 6 shows the perspective view that the equilibrium arm of arm tower crane coordinates with counterbalanced weight according to an embodiment of the invention;
Fig. 7 shows the structural representation of the counterbalanced weight of arm tower crane according to an embodiment of the invention;
Fig. 8 shows the structural representation of the rolling mechanism on the counterbalanced weight of arm tower crane according to an embodiment of the invention;
Fig. 9 shows the fluid control constructional drawing of the telescoping mechanism of arm tower crane according to an embodiment of the invention;
Figure 10 shows the counterbalanced weight of arm tower crane and the location diagram of crane arm according to an embodiment of the invention;
Figure 11 shows the counterbalanced weight of arm tower crane and the kinematic sketch of crane arm according to an embodiment of the invention; And
Figure 12 shows the counterbalanced weight of arm tower crane and the motion structure schematic diagram of crane arm according to an embodiment of the invention.
Reference numeral: 10, slewing tower; 20, crane arm; 30, equilibrium arm; 40, counterbalanced weight; 50, rolling mechanism; 11, telescoping mechanism; 12, balance cock; 13, change-over valve; 21, the first connecting arm; 31, guide rail; 41, the second connecting arm; 51, bearing pin; 52, roller; 53, baffle plate; 54, antifriction-bearing box; 55, sleeve; 56, axle sleeve; 57, back-up ring.
The specific embodiment
Hereinafter with reference to accompanying drawing, also describe the present invention in detail in conjunction with the embodiments.It should be noted that, in the situation that not conflicting, embodiment and the feature in embodiment in the application can combine mutually.
As shown in Figures 1 to 12, according to embodiments of the invention, arm tower crane comprises slewing tower 10, crane arm 20 and equilibrium arm 30.Slewing tower 10 is arranged on tower body rotationally, for controlling the rotation of the whole topside of arm tower crane.The first end of crane arm 20 is hinged on slewing tower 10, and can be in luffing plane luffing.Between crane arm 20 and slewing tower 10, be provided with for crane arm 20 being carried out to the telescoping mechanism 11 of luffing, by controlling the flexible work range that can regulate crane arm 20 of telescoping mechanism.The first end of equilibrium arm 30 is arranged on slewing tower 10, for matching with crane arm 20, keeps the stable of whole arm tower crane.The bottom of crane arm 20 is fixedly connected with the first connecting arm 21, is connected with the second connecting arm 41, the first connecting arms 21 and the second connecting arm 41 that towards crane arm 20, extend hinged on counterbalanced weight 40.When telescoping mechanism 11 drives crane arm 20 luffing, the first connecting arm 21 drives the second connecting arm 41 motions, and then realizes the movement of counterbalanced weight 40 along continuous straight runs on equilibrium arm 30.
On equilibrium arm 30, along continuous straight runs is provided with counterbalanced weight 40 movably, by adjustment, weigh 40 positions on equilibrium arm 30, can be so that realize dynamical equilibrium between crane arm 20 and equilibrium arm 30, guarantee the moment balance of tower body both sides, make the each several part structure stress of tower crane more reasonable, thereby effectively extend the service life of tower crane.For the ease of realizing between the first connecting arm 21 and crane arm 20, be connected, and do not change the structure of crane arm 20 self, at the arm root place of crane arm 20, be provided with connection otic placode, the first connecting arm 21 is hinged on this connection otic placode.In order to improve the structural strength of equilibrium arm 30, guarantee the stress balance of equilibrium arm 30 simultaneously, between the both sides of equilibrium arm 30 and the upper bracket of slewing tower 10, a strut bar can also be set respectively.
By the mode of using above-mentioned telescoping mechanism luffing and crane arm 20 and counterbalanced weight 40 interlocks to regulate, the mass centre changing of crane arm side can make relative tower body center, counterbalanced weight position change, and there is following rule: in crane arm amplitude changing process, the center of gravity of crane arm side and counterbalanced weight center of gravity simultaneously relative tower body center are close or separate, like this, the moment that balance tower body both sides produce to greatest extent, makes tower body stressed more reasonable.
In the process of arm tower crane work, if need to carry out luffing to crane arm 20, can stretch to adjust accordingly by controlling telescoping mechanism 11, make crane arm 20 arrive desired position.In the flexible process of telescoping mechanism 11, crane arm 20 rotates, can drive the first connecting arm 21 being fixedly installed on crane arm 20 to rotate together, and then drive the second connecting arm 41 to move by the first connecting arm 21, and drive counterbalanced weight 40 to move with the luffing of crane arm 20 by the second connecting arm 41, the position of counterbalanced weight 40 is adjusted, thereby the moment that guarantees equilibrium arm 30 can realize dynamical equilibrium with the moment of crane arm 20 all the time, guarantee the each several part structure stress balance of whole tower crane, stability and reliability while improving tower crane work.
When tradition rope luffing is former, thereby be mainly to rely on the pulling force of steel rope to realize crane arm from significantly changing to by a small margin; And from changing to by a small margin large work range, mainly rely on the gravity of crane arm, that is: variable-amplitude steel wire rope can only provide pulling force to realize, and makes crane arm work range from large to small, during the moment balance of tower body both sides, rope luffing may not luffing or luffing difficulty, seriously reduces luffing efficiency.Because telescoping mechanism 11 can provide telescopic action power, therefore can provide for the movement of counterbalanced weight 40 enough propulsive efforts, thereby can avoid realizing after moment balance between equilibrium arm 30 and crane arm 20, due to counterbalanced weight 40 moves the excessive crane arm 20 that causes only depending on self gravitation to realize luffing of friction drag cannot luffing or the problem of luffing difficulty, therefore can improve the stability of tower crane amplitude variation work.
In addition, by telescoping mechanism 11, carry out luffing, just can save the rope luffing structures such as A cabinet frame in traditional rope luffing mode and safety rope, structure is simpler, the installation and maintenance of being more convenient for, control convenient,
In the present embodiment, this telescoping mechanism 11 is hydraulic ram, and the piston cylinder of hydraulic ram is hinged on the upper bracket of slewing tower 10, and piston rod is hinged on crane arm 20, and crane arm 20 is realized the luffing of crane arm 20 by the jacking of hydraulic ram.Hydraulic ram is two, and two hydraulic rams are separately positioned on the two opposite sides of crane arm 20, and keeps synchronous working, thereby can guarantee crane arm 20 stress balance in the course of the work, improves the stability of tower crane work.
In conjunction with shown in Figure 9, in the present embodiment, hydraulic ram is controlled by diagram hydraulic efficiency pressure system.Between hydraulic ram and hydraulic oil source, be provided with change-over valve 13, change-over valve 13 can be controlled hydraulic ram commutation, realizes the flexible of hydraulic ram.Between change-over valve 13 and two hydraulic rams, be provided with balance cock, can guarantee that hydraulic ram working stability is reliable.
In conjunction with referring to shown in Fig. 1 and Fig. 2, thereby by controlling the stroke of oil cylinder arm, can realize the luffing of crane arm, when crane arm 20 is during in maximum functional amplitude, hydraulic ram is in minimum stroke place; When oil cylinder stroke is maximum, crane arm 20 is in minimum work range.The variation of the amplitude of the extension and contraction control crane arm of employing hydraulic ram, not only simple in structure, and control conveniently.
Preferably, the adjustable in length of the first connecting arm 21 and/or the second connecting arm 41, thereby can suitably adjust according to the difference of crane arm 20 hoisting heavies the distance of counterbalanced weight 40, thereby make counterbalanced weight can there is various moment scope, can meet the moment balance needs of the crane arm 20 under various working, therefore make arm tower crane there is applicability more widely.The first connecting arm 21 and the second connecting arm 41 can be hydraulic ram or two-thread screw etc.
Preferably, counterbalanced weight 40 is slidably disposed on equilibrium arm 30 along the length direction of equilibrium arm 30.
In conjunction with referring to shown in Fig. 7 and Fig. 8, in the present embodiment, the two opposite sides correspondence of counterbalanced weight 40 is provided with rolling mechanism 50, and by rolling mechanism 50, the length direction along equilibrium arm 30 is rollably arranged on equilibrium arm 30 counterbalanced weight 40.Counterbalanced weight 40 comprises a plurality of clump weights that are arranged side by side, and between a plurality of clump weights, by side otic placode, links together, and guarantees that a plurality of clump weights move simultaneously.
Rolling mechanism 50 comprises bearing pin 51 and roller 52, and bearing pin 51 is fixedly connected on the sidewall of counterbalanced weight 40, and along the direction horizontal-extending of counterbalanced weight 40; Roller 52 is set on bearing pin 51 rotationally.By coordinating of roller 52 and bearing pin 51, can make between counterbalanced weight 40 and equilibrium arm 30 is friction of rolling, therefore can reduce the friction force between counterbalanced weight 40 and equilibrium arm 30, workload when reduction counterbalanced weight 40 moves, the work efficiency of raising hydraulic ram.
Preferably, the outer end of bearing pin 51 is fixedly installed baffle plate 53, and baffle plate 53 backstops are in roller 52 outsides, for limiting moving axially of roller 52.Baffle plate 53 can by the axial restraints such as bearing pin, bolt be arranged on bearing pin 51.
Preferably, between the inner ring of roller 52 and bearing pin 51, be also provided with antifriction-bearing box 54, friction force when this antifriction-bearing box 54 can reduce roller 52 rolling further.In the present embodiment, antifriction-bearing box 54 is two, is all arranged between roller 52 and bearing pin 51, between two antifriction-bearing boxs 54, is provided with back-up ring 57, can limit the axial location of two antifriction-bearing boxs 54.Between antifriction-bearing box 54 and counterbalanced weight 40, can also be provided with sleeve 55, sleeve 55 is set on bearing pin 51, make to form interval between roller 52 and counterbalanced weight 40, prevent roller 52 when motion side with counterbalanced weight 40 between produce and rub and affect service life of roller 52.Between sleeve 55 and antifriction-bearing box 54, be also provided with axle sleeve 56, this axle sleeve 56 adopts wearing piece to make, and can play the effect of axial location antifriction-bearing box 54.
Preferably, the inner side of equilibrium arm 30 is provided with guide rail 31, and counterbalanced weight 40 is arranged on guide rail 31.This guide rail 31 can be fixedly welded on the inner side of counterbalanced weight 40, also can be removably disposed in the inner side of counterbalanced weight 40.Guide rail 31 extends along the length direction of equilibrium arm 30, for the formation directional tagging that moves along the length direction of equilibrium arm 30 to counterbalanced weight 40.
Preferably, guide rail 31 is tilted to downward-extension along the direction near crane arm 20.In the present embodiment, the sloping portion that guide rail 31 comprises the horizontal component of the outer end that is positioned at equilibrium arm 30 and is positioned at the inner side, outer end of equilibrium arm 30, because this guide rail 31 is with certain gradient, therefore can make counterbalanced weight 40 when free state, move to low order end, and now crane arm 20 is positioned at minimum work range place.
In conjunction with shown in Figure 12, with leverage, be expressed as movable arm tower crane kinematic sketch herein, wherein: O point is the arm root hinge of crane arm 20, it is fixing hinge; OBF represents the crane arm 20 of movable arm tower crane; AB represents hydraulic ram, therefore the length of AB can be stretched; CE is that the first end of the first connecting arm 21, the first connecting arms 21 is hinged on counterbalanced weight 40, and the second end is connected with the second connecting arm 41; CD is that the first end of the second connecting arm 41, the second connecting arms 41 connects counterbalanced weight 40, and this counterbalanced weight 40 can move on horizontal surface; E is the point between OB, and bar CE is fixedly connected on OBF.
When crane arm 20 is positioned at OBF position, crane arm 20 is in maximum functional amplitude state, the high order end of counterbalanced weight 40 in equilibrium arm 30 now, now, counterbalanced weight 40 moment of flexure that balance crane arm 20 produces well; When crane arm 20 is placed in OB1F1 position, crane arm 20 is in minimum work range place, and counterbalanced weight 40 is positioned at the low order end of equilibrium arm 30.The flexible luffing that can realize arm tower crane by hydraulic ram moves, by simple connecting rod mechanism, can make counterbalanced weight 40 centers of gravity along with the mass centre changing of crane arm 20 changes, therefore only need on arm tower crane, increase the structures such as Simple Member newly can realize the crane arm 20 of automatic adjusting tower crane, the both sides of equilibrium arm 30 are stressed, makes the moment balance of crane arm 20 and counterbalanced weight 40.
In conjunction with shown in Figure 11, when crane arm 20 is during in maximum functional amplitude state, hydraulic ram AB is in minimum stroke place, and now counterbalanced weight 40 is positioned at the end of equilibrium arm 30; When hydraulic ram extends, promote crane arm 20 around hinge O point left-hand revolution, the luffing of having realized on the one hand crane arm 20 moves, on the other hand by the rotation with the fixing bar CE of OBF, drive counterbalanced weight 40 side-to-side movements, realize the dynamical equilibrium of equilibrium arm 30 and crane arm 20.
In conjunction with shown in Figure 10, the relation that represents crane arm change angle a and counterbalanced weight miles of relative movement L, in figure, D, D1 point represents that respectively crane arm is in maximum, minimum work range, the length of figure king-rod OC, bar CD and OD is known, as can be seen from Figure, according to the cosine law, can obtain:
Formula (2) is all known quantity, L oDfor equilibrium arm brachium, a is the differential seat angle of amplitude peak and minimum radius, is generally fixed value, can be by selecting suitable L cD, L oCdetermine the distance L that counterbalanced weight moves.
Through calculating L, and the weight of counterbalanced weight 40 can the quantitative moment for balance crane arm place side, reaches quantitative control tower body two end moments, thereby realize the object of at utmost utilizing counterbalanced weight.
In conjunction with shown in Figure 10, the theory in said process can be calculated to be known: if the length of 1 OC is fixed, regulate the length of CD can control the distance L that counterbalanced weight 40 moves; If the length of 2 CD is fixed, can regulate the length of OC to carry out the heavily mobile distance L of adjustment, corresponding different L value can produce the moment balance of different moment and the generation of crane arm side.
Movable arm tower crane has many different brachiums combinations, the corresponding counterbalanced weight that also has corresponding weight, if set the length of OC or CD, through certain theory, calculate and can draw most suitable L value, the moment that now balance crane arm side produces to greatest extent, reaches the maximum object of utilizing of counterbalanced weight.
As can be seen from the above description, the above embodiments of the present invention have realized following technique effect:
1, the top lift that hydraulic pressure produces is large, can facilitate luffing motion.
2, hydraulic luffing replaces rope luffing in the past, has stability high, failure rate is low, the problems such as various row's ropes of avoiding rope luffing to produce.
3, for the large-scale movable arm tower crane that adopts all-hydraulic control, hydraulic luffing is more easily realized, and capacity usage ratio is also higher.
4, adopt hydraulic luffing can simplify tower machine structure and form, save the structures such as A cabinet frame on traditional tower crane, safety rope, reduce the cost of tower machine.
5, can avoid realizing after moment balance between equilibrium arm and crane arm, due to counterbalanced weight moves the excessive crane arm that causes only depending on self gravitation to realize luffing of friction drag cannot luffing or the problem of luffing difficulty, therefore can improve the stability of tower crane amplitude variation work.
6, tower machine is along with the continuous variation of work range, and the moment of counterbalance moment and crane arm, all the time in best dynamical equilibrium, improves and guaranteed stability, the reliability of tower machine.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.

Claims (11)

1. an arm tower crane, is characterized in that, comprising:
Slewing tower (10);
Crane arm (20), it is upper that first end is hinged on described slewing tower (10), is provided with for described crane arm (20) being carried out to the telescoping mechanism (11) of luffing between described crane arm (20) and described slewing tower (10);
Equilibrium arm (30), it is upper that first end is arranged on described slewing tower (10), and the upper along continuous straight runs of described equilibrium arm (30) is provided with counterbalanced weight (40) movably;
The bottom of described crane arm (20) is fixedly connected with the first connecting arm (21), on described counterbalanced weight (40), be connected with the second connecting arm (41) extending towards described crane arm (20), described the first connecting arm (21) is hinged with described the second connecting arm (41).
2. arm tower crane according to claim 1, it is characterized in that, when described telescoping mechanism (11) drives described crane arm (20) luffing, described the first connecting arm (21) drives described the second connecting arm (41) motion, and then realizes described counterbalanced weight (40) in the movement of the upper along continuous straight runs of described equilibrium arm (30).
3. arm tower crane according to claim 2, is characterized in that, described telescoping mechanism (11) is telescopic oil cylinder.
4. arm tower crane according to claim 2, is characterized in that, the adjustable in length of described the first connecting arm (21) and/or described the second connecting arm (41).
5. arm tower crane according to claim 2, is characterized in that, described counterbalanced weight (40) is slidably disposed on described equilibrium arm (30) along the length direction of described equilibrium arm (30).
6. arm tower crane according to claim 2, it is characterized in that, the two opposite sides correspondence of described counterbalanced weight (40) is provided with rolling mechanism (50), and by described rolling mechanism (50), the length direction along described equilibrium arm (30) is rollably arranged on described equilibrium arm (30) described counterbalanced weight (40).
7. arm tower crane according to claim 6, is characterized in that, described rolling mechanism (50) comprising:
Bearing pin (51), is fixedly connected on the sidewall of described counterbalanced weight (40), and along the direction horizontal-extending of described counterbalanced weight (40); And
Roller (52), is set on described bearing pin (51) rotationally.
8. arm tower crane according to claim 7, is characterized in that, the outer end of described bearing pin (51) is fixedly installed baffle plate (53), and described baffle plate (53) is for limiting moving axially of described roller (52).
9. arm tower crane according to claim 8, it is characterized in that, between the inner ring of described roller (52) and described bearing pin (51), be also provided with antifriction-bearing box (54), between described antifriction-bearing box (54) and described counterbalanced weight (40), be also provided with sleeve (55), it is upper that described sleeve (55) is set in described bearing pin (51), between described sleeve (55) and described antifriction-bearing box (54), is also provided with axle sleeve (56).
10. according to the arm tower crane described in any one in claim 5 to 9, it is characterized in that, the inner side of described equilibrium arm (30) is provided with guide rail (31), and described counterbalanced weight (40) is arranged on described guide rail (31).
11. arm tower cranes according to claim 10, is characterized in that, described guide rail (31) is tilted to downward-extension along the direction near described crane arm (20).
CN201310537940.XA 2013-11-04 2013-11-04 Movable arm tower crane Pending CN103523682A (en)

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Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105174079A (en) * 2015-10-21 2015-12-23 无锡港盛重型装备有限公司 Novel tower crane
CN107827000A (en) * 2017-10-23 2018-03-23 四川建设机械(集团)股份有限公司 Swing crane counterweight synchronous moving mechanism
CN109650304A (en) * 2018-12-14 2019-04-19 中联重科股份有限公司 More performance curve switching methods, system and aerial lift device

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201268560Y (en) * 2008-09-27 2009-07-08 廊坊凯博建设机械科技有限公司 Counterweight automatic synchronization mobile device for tower crane
EP2360113A1 (en) * 2010-02-11 2011-08-24 Vinicius De Carvalho Cal Crane and counterweight control process of a crane
CN202346635U (en) * 2011-09-29 2012-07-25 鲁国庆 Tower crane capable of movably weighing
CN202744238U (en) * 2012-08-30 2013-02-20 山东丰汇设备技术有限公司 Automatic balance control tower type crane

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201268560Y (en) * 2008-09-27 2009-07-08 廊坊凯博建设机械科技有限公司 Counterweight automatic synchronization mobile device for tower crane
EP2360113A1 (en) * 2010-02-11 2011-08-24 Vinicius De Carvalho Cal Crane and counterweight control process of a crane
CN202346635U (en) * 2011-09-29 2012-07-25 鲁国庆 Tower crane capable of movably weighing
CN202744238U (en) * 2012-08-30 2013-02-20 山东丰汇设备技术有限公司 Automatic balance control tower type crane

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105174079A (en) * 2015-10-21 2015-12-23 无锡港盛重型装备有限公司 Novel tower crane
CN107827000A (en) * 2017-10-23 2018-03-23 四川建设机械(集团)股份有限公司 Swing crane counterweight synchronous moving mechanism
CN109650304A (en) * 2018-12-14 2019-04-19 中联重科股份有限公司 More performance curve switching methods, system and aerial lift device

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Application publication date: 20140122