CN102992209B - Balance weight of crane, crane and moment balancing method of crane - Google Patents
Balance weight of crane, crane and moment balancing method of crane Download PDFInfo
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- CN102992209B CN102992209B CN201210559228.5A CN201210559228A CN102992209B CN 102992209 B CN102992209 B CN 102992209B CN 201210559228 A CN201210559228 A CN 201210559228A CN 102992209 B CN102992209 B CN 102992209B
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Abstract
The invention provides a balance weight of a crane, the crane and a moment balancing method of the crane. This counter weight includes: the variable counterweight is arranged on the balance arm of the crane and can be rotatably arranged relative to the balance arm, the moment arm of the counterweight relative to the tower body of the crane is changed along with the rotation of the variable counterweight, the variable counterweight comprises two groups of variable counterweight components which are respectively positioned at two sides of the vertical central plane of the balance arm, and the two groups of variable counterweight components respectively rotate around the vertical axis at the side where the two groups of variable counterweight components are respectively positioned; and the rotation driving device is connected with the variable balance weights to drive the two groups of variable balance weight assemblies to rotate relative to the balance arms respectively. The invention can solve the problem of moment balance of the crane without changing the weight of the balance weight and replacing the balance arm.
Description
Technical field
The present invention relates to elevator machinery field, more specifically, relate to a kind of moment balance method of counterbalanced weight, hoisting crane and hoisting crane of hoisting crane.
Background technology
In prior art, the installation of tower crane counterbalanced weight is generally the tail end that is fixedly placed in equilibrium arm, when design, and the hypsokinesis moment of flexure that while generally following the suffered moment of flexure that leans forward of tower crane tower body when maximum lift heavy close to off working state, tower body bears.In the time need to using the crane arm of galianconism length, counterbalanced weight must be adjusted.Tower crane particularly flat arm-type tower crane, when adjustment moment, generally all adopts and adjusts the weight of counterbalanced weight or change two kinds of regulative modes of equilibrium arm and realize.
As shown in Figure 1, the tower crane of prior art comprises tower body 50 and the crane arm 40 and the equilibrium arm 30 that are installed on both sides, tower body top.Described in two kinds of regulative modes of this tower crane when adjusting the weight of counterbalanced weight 10 are specific as follows:
The first is adjusted mode as shown in Figure 2, during adjusting, need first the mounting rod of counterbalanced weight 10 to be laid down, use other lifting appliance that counterbalanced weight 10 is unloaded and trim again, the counterbalanced weight 10 that adopts overlapped way to install at some, may need all counterbalanced weight pouring weights of counterbalanced weight 10 all to unload, more as required former counterbalanced weight 10 is adjusted into after new counterbalanced weight 10A and re-start and reinstall.
While adopting the first adjustment mode to carry out the adjusting of balancing torque of hoisting crane, needed weight-lifting equipment is more, and in actual use, convert the spent time of once balance moment longer, simultaneously, if the counterbalanced weight that uses stacked system to install is inconvenient in adjustment, whole counterbalanced weight all need to be unloaded and adjusts.Moreover because the moment of fixed type counterbalanced weight can not change, tower crane is when off working state, the suffered hypsokinesis moment of flexure of tower body is under high wind condition, will make the stressed very severe of tower body, when high-altitude wind speed is larger, tower crane has down the potential danger of tower.
The second is adjusted mode as shown in Figure 3, for for balancing torque than more sensitive flat arm type tower crane tower crane, when adjustment counterbalanced weight 10 can not obtain required balancing torque, former equilibrium arm 30 need to be replaced by equilibrium arm 30A, now must first the mounting rod of former counterbalanced weight 30 be unloaded, and use lifting equipment that former counterbalanced weight 30 is unloaded, the tower machine tower crane form of some ad hoc structures, also crane arm 40 integral body must be unloaded, change after the long equilibrium arm 30A of galianconism, then re-start installation.
While adopting the second adjustment mode to carry out the adjusting of balancing torque of hoisting crane, adopt replacing equilibrium arm length to obtain different balancing torques sizes, the installation and removal of equilibrium arm will expend a large amount of time, some brachium may can be realized after crane arm under dismounting, this is very restricted when skyscraper is used, because on-the-spot lifting appliance is less, adopt this kind of mode to change balancing torque time-consuming, and economy is lower.
Summary of the invention
The object of the invention is to provide a kind of moment balance method of counterbalanced weight, hoisting crane and hoisting crane of hoisting crane, can not change the problem that solves the moment balance of hoisting crane under the weight of counterbalanced weight and the prerequisite of replacing equilibrium arm.
A first aspect of the present invention provides a kind of counterbalanced weight of hoisting crane, comprise: variable counterbalanced weight, variable counterbalanced weight is arranged on the equilibrium arm of hoisting crane and arranges rotationally with respect to equilibrium arm, with respect to the arm of force of the tower body of hoisting crane, the rotation with variable counterbalanced weight changes counterbalanced weight, variable counterbalanced weight comprises two groups of variable counterbalanced weight assemblies that lay respectively at the vertical centre plane both sides of equilibrium arm, and two groups of variable counterbalanced weight assemblies rotate around vertical axis in the side at place separately respectively; Device of rotation driving, is connected to drive two groups of variable counterbalanced weight assemblies with respect to equilibrium arm, to rotate respectively with variable counterbalanced weight.
Further, the variable counterbalanced weight assembly vertical axis rotation that winding is placed in place one side respectively; Two groups of variable counterbalanced weight assemblies, two vertical axis are symmetrical arranged with respect to the vertical centre plane of equilibrium arm respectively.
Further, every group of variable counterbalanced weight assembly comprises: turning cylinder, with respect to equilibrium arm, be vertically arranged at rotationally on equilibrium arm, and the central axis of turning cylinder forms vertical axis; Counterbalanced weight pouring weight, regularly setting relative to turning cylinder.
Further, variable counterbalanced weight assembly also comprises the bearing being arranged between equilibrium arm and turning cylinder.
Further, variable counterbalanced weight assembly also comprises counterbalanced weight erecting frame, and counterbalanced weight pouring weight is connected by counterbalanced weight erecting frame with turning cylinder.
Further, variable counterbalanced weight assembly also comprises pouring weight pull bar, and pouring weight pull bar is positioned at counterbalanced weight erecting frame top, and the first end of pouring weight pull bar is connected with counterbalanced weight pouring weight, and the second end of pouring weight pull bar is connected with turning cylinder.
Further, device of rotation driving comprises: rotor wheel, comprises being a plurality ofly arranged at turning cylinder periphery and along the control lever radially extending of turning cylinder; Rotary handle, one end of rotary handle has the connecting portion being removably connected with the outer end of control lever.
Further, variable counterbalanced weight assembly also comprise the indicating device of the indication balancing torque corresponding with the current location of variable counterbalanced weight.
Further, balance escheat comprises and two groups of variable counterbalanced weight assemblies indicating device of balancing torque corresponding to indication and the corresponding variable counterbalanced weight assembly current location of corresponding setting one by one, indicating device comprises: calibrated disc, calibrated disc with for demarcating the size of the balancing torque of hoisting crane; Pointer, arrange with interval with the surface of calibrated disc, pointer has indication end and the coupling end being oppositely arranged, and the connection of coupling end is centered close on the central axis of calibrated disc, one on calibrated disc and pointer is fixedly installed with respect to turning cylinder, and another is fixedly installed with respect to equilibrium arm.
Further, the balance escheat of hoisting crane comprises the anchor fitting for the relative position between fixing variable counterbalanced weight and equilibrium arm.
Further, anchor fitting comprises: set collar, arranges set collar on each variable counterbalanced weight assembly; Fixed link assembly, comprises respectively through the thread rod of the set collar on two variable counterbalanced weight assemblies and the lockout mechanism that thread rod and corresponding set collar are locked together.
Further, on each variable counterbalanced weight assembly, a set collar is set, set collar comprises and revolves the thread segment of being located on corresponding variable counterbalanced weight assembly, anchor fitting also comprises the lock nut coordinating with thread segment of locking set collar and the relative angle of variable counterbalanced weight assembly, and set collar passes to be suitable for thread rod according to the angle of the rotational angle change between variable counterbalanced weight assembly and equilibrium arm self.
Further, the lockout mechanism of fixed link assembly comprises: a plurality of bar covers, at least one bar cover that thread rod selectively penetrates a plurality of bars covers according to variable counterbalanced weight assembly and rotational angle between equilibrium arm dock the bar cover group of formation successively, thread rod penetrates after set collar, between the set collar of bar cover group on two variable counterbalanced weight assemblies and the two ends of bar cover group respectively with the set collar butt of corresponding one end; Two captive nuts, revolve respectively the two ends of being located at thread rod with by thread rod and set collar locking.
A second aspect of the present invention provides a kind of hoisting crane, comprises equilibrium arm and is arranged at the counterbalanced weight on equilibrium arm, and wherein counterbalanced weight is the counterbalanced weight of the hoisting crane of any one in first aspect present invention.
A third aspect of the present invention provides a kind of moment balance method of hoisting crane according to a second aspect of the invention, moment balance method comprises: the device of rotation driving by hoisting crane drives variable counterbalanced weight that variable counterbalanced weight is rotated with respect to equilibrium arm, and by the counterbalanced weight of hoisting crane with respect to the torque adjusting of the tower body of hoisting crane to the level needing.
According to the moment balance method of the counterbalanced weight of hoisting crane of the present invention, hoisting crane and hoisting crane, because variable counterbalanced weight arranges rotationally with respect to equilibrium arm, and with respect to the arm of force of the tower body of hoisting crane, the rotation with variable counterbalanced weight changes counterbalanced weight, as long as drive variable counterbalanced weight to rotate with respect to equilibrium arm, can change the center of gravity of counterbalanced weight, thereby by changing the arm of force size of variable counterbalanced weight, change the balancing torque of hoisting crane, without changing the weight of counterbalanced weight and changing the problem that equilibrium arm can solve the moment balance of hoisting crane.And, the counterbalanced weight of this hoisting crane is divided into two integral counterweights of the prior art, according to the total weight of counterbalanced weight is distributed equally the counterbalanced weight pouring weight of both sides, alleviated the weight of single group of counterbalanced weight pouring weight, when handling counterbalanced weight pouring weight and change balancing torque, be more prone to convenient.
Accompanying drawing explanation
The accompanying drawing that forms the application's a part 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 is the hoisting crane of prior art and the structural representation of counterbalanced weight thereof;
Fig. 2 is that hoisting crane shown in Fig. 1 adopts hoisting crane after the first regulative mode regulates and the structural representation of counterbalanced weight thereof;
Fig. 3 is that hoisting crane shown in Fig. 1 adopts hoisting crane after the second regulative mode regulates and the structural representation of counterbalanced weight thereof;
Fig. 4 is according to two groups of structural representations that variable counterbalanced weight assembly is arranged along the bearing of trend of equilibrium arm in the counterbalanced weight of hoisting crane of the present invention;
Fig. 5 is the plan structure schematic diagram of Fig. 4;
Fig. 6 is according to the structural representation of the device of rotation driving of the hoisting crane of the embodiment of the present invention and counterbalanced weight thereof and calibrated disc;
Fig. 7 rotates the structural representation after 30 degree with respect to the bearing of trend of equilibrium arm to both sides respectively according to two groups of variable counterbalanced weight assemblies in the counterbalanced weight of hoisting crane of the present invention;
Fig. 8 rotates the structural representation after 90 degree with respect to the bearing of trend of equilibrium arm to both sides respectively according to two groups of variable counterbalanced weight assemblies in the counterbalanced weight of hoisting crane of the present invention;
Fig. 9 turns to the structural representation of maximum angle with respect to the bearing of trend of equilibrium arm respectively according to two groups of variable counterbalanced weight assemblies in the counterbalanced weight of hoisting crane of the present invention to both sides;
Figure 10 is according to the structural representation of fixed link assembly in the counterbalanced weight of hoisting crane of the present invention.
The specific embodiment
Describe below with reference to the accompanying drawings and in conjunction with the embodiments the present invention in detail.It should be noted that, in the situation that not conflicting, embodiment and the feature in embodiment in the application can combine mutually.
The counterbalanced weight of hoisting crane of the present invention comprises variable counterbalanced weight and device of rotation driving.Variable counterbalanced weight is arranged on the equilibrium arm of hoisting crane and arranges rotationally with respect to equilibrium arm, and with respect to the arm of force of the tower body of hoisting crane, the rotation with variable counterbalanced weight changes counterbalanced weight.110, two groups of variable counterbalanced weight assemblies 110 of variable counterbalanced weight assembly that variable counterbalanced weight comprises two groups of vertical centre plane both sides that lay respectively at equilibrium arm 30 rotate around vertical axis in the side at place separately respectively.Device of rotation driving is connected to drive two groups of variable counterbalanced weight assemblies 110 with respect to equilibrium arm, to rotate respectively with variable counterbalanced weight.
Because variable counterbalanced weight arranges rotationally with respect to equilibrium arm, and with respect to the arm of force of the tower body of hoisting crane, the rotation with variable counterbalanced weight changes counterbalanced weight, as long as drive variable counterbalanced weight that it is rotated with respect to equilibrium arm, can change the center of gravity of counterbalanced weight, thereby by changing arm of force size, change the balancing torque of hoisting crane.And, the counterbalanced weight of this hoisting crane is divided into two integral counterweights of the prior art, according to the total weight of counterbalanced weight is distributed equally the counterbalanced weight pouring weight of both sides, alleviated the weight of single group of counterbalanced weight pouring weight, when handling counterbalanced weight pouring weight and change balancing torque, be more prone to convenient.
Below with reference to 4 to 10 pairs of one embodiment of the present of invention of accompanying drawing, be specifically described.The hoisting crane of the present embodiment comprises tower body 50, is arranged at crane arm 40 and the equilibrium arm 30 at tower body 50 tops and is arranged at the counterbalanced weight 100 on equilibrium arm 30.The front end of crane arm 40 in hoisting crane, for arranging amplitude variation trolley and lifting cargo.Tower body 50 balance support arms 30 and crane arm 40.
The counterbalanced weight 100 of the hoisting crane of this embodiment has formed a kind of counterbalanced weight of dovetail type.The counterbalanced weight 100 of this dovetail type changes the size of balancing torque by the swing of counterbalanced weight pouring weight 112, to change balancing torque not changing the length of equilibrium arm and again lift under the prerequisite of counterbalanced weight.
Shown in Fig. 4 to Figure 10, in the present embodiment, the counterbalanced weight 100 of hoisting crane comprises variable counterbalanced weight, device of rotation driving 120, anchor fitting 130 and indicating device 140.
Variable counterbalanced weight is arranged on the afterbody of equilibrium arm 30, and rotates around the vertical axis of the bearing of trend perpendicular to equilibrium arm 30.Wherein, variable counterbalanced weight specifically comprises two groups of variable counterbalanced weight assemblies 110.Two groups of variable counterbalanced weight assemblies 110 are symmetrical arranged with respect to the vertical centre plane of equilibrium arm 30.The vertical axis that every group of variable counterbalanced weight assembly 110 winding are placed in self place one side rotates.Two vertical axis that are positioned at the vertical centre plane both sides of equilibrium arm 30 are also symmetrical arranged with respect to the vertical centre plane of equilibrium arm 30.
The counterbalanced weight 100 of this hoisting crane is divided into two integral counterweights of the prior art, according to the total weight of counterbalanced weight 100 is distributed equally the counterbalanced weight pouring weight of both sides, alleviated the weight of single group of counterbalanced weight pouring weight, when handling counterbalanced weight pouring weight and change balancing torque, be more prone to convenient.
As shown in Figure 4 and Figure 5, each variable counterbalanced weight assembly 110 comprises turning cylinder 111, counterbalanced weight pouring weight 112, bearing 113, counterbalanced weight erecting frame 114 and pouring weight pull bar 115.
Turning cylinder 111 is vertically arranged on equilibrium arm 30 rotationally with respect to equilibrium arm 30.The central axis of turning cylinder 111 forms aforesaid vertical axis.Wherein counterbalanced weight pouring weight 112 is relative with turning cylinder 111 arranges regularly.Thereby each counterbalanced weight pouring weight 112 can rotate to change the center of gravity of counterbalanced weight pouring weight 112 with respect to the distance of tower body 50 in a side at self place around the central axis of corresponding turning cylinder 111, thereby changes the balancing torque of hoisting crane.
Bearing 113 is arranged between equilibrium arm 30 and turning cylinder 111.Bearing 113 preferably adopts tapered roller bearing.In the present embodiment, the two ends up and down of turning cylinder 111 are connected with the upper and lower two ends of afterbody of equilibrium arm 30 respectively, thereby the upper/lower terminal of each turning cylinder 111 respectively arranges a bearing 113.Bearing 113 is set and can makes turning cylinder 111 flexible with respect to the rotation of equilibrium arm 30, thus required operating effort when the friction force when reducing counterbalanced weight pouring weight 112 and rotating reduces torque adjusting.
Counterbalanced weight pouring weight 112 is installed on the counterbalanced weight erecting frame 114 of the lower end that is fixed on turning cylinder 111.
Pouring weight pull bar 115 is positioned at corresponding counterbalanced weight erecting frame 114 tops, and the first end of pouring weight pull bar 115 is connected with counterbalanced weight pouring weight 112, and the second end of pouring weight pull bar 115 is connected with turning cylinder 111.In the present embodiment, the first end of pouring weight pull bar 115 is connected with the afterbody upper end of counterbalanced weight pouring weight 112 particularly, and the second end is connected with the upper end of turning cylinder 111.Pouring weight pull bar 115 is set, can guarantees the stress equalization of counterbalanced weight pouring weight 112, also can guarantee the stable of counterbalanced weight pouring weight 112 simultaneously.
As shown in Figure 4 and Figure 5, device of rotation driving 120 is for driving variable counterbalanced weight assembly 110 to rotate to obtain the balancing torque of different big or small hoisting cranes.
As shown in Figure 6, in the present embodiment, device of rotation driving 120 comprises rotor wheel 121 and rotary handle 122.Rotor wheel 121 comprises a plurality of control lever that are arranged at turning cylinder 111 peripheries and radially extend.One end of rotary handle 122 has the connecting portion being removably connected with the outer end of control lever.Particularly, rotating drive mechanism 120, with six control lever, is distinguished the turned position in six orientation of corresponding variable counterbalanced weight assembly 110.In the present embodiment, six control lever of rotor wheel 121 are hollow circular-tube, and each hollow circular-tube is evenly arranged along the periphery of turning cylinder 111.Preferably, each hollow round bar is welded on the calibrated disc 141 of indicating device 140, and calibrated disc 141 is coaxially fixedly installed with turning cylinder 111.When rotating variable counterbalanced weight assembly 110, can select to have in six control lever a control lever of the stressed access point of most convenient, the connecting portion of rotary handle 122 is connected on this control lever, promotes rotary handle 122 and can promote corresponding variable counterbalanced weight assembly 110 rotations.
In the present embodiment, by rotor wheel 121 and turning handle 122, drive variable counterbalanced weight assembly 110 to rotate, operation is very reliable and convenient.Turning handle 122 adopts design for convenience detach, the arm of force when length of turning handle 122 can extend operation on the one hand, reduce required operating effort, on the other hand, connected control lever can be changed at any time so that drive, and turning handle 122 can be unloaded when not using, the interference when avoiding with other component working.
Balance escheat comprises and two groups of variable counterbalanced weight assemblies 110 indicating device 140 of balancing torque corresponding to indication and corresponding variable counterbalanced weight assembly 110 current locations of corresponding setting one by one.Indicating device 140 is used to indicate the balancing torque of variable counterbalanced weight assembly 110 corresponding hoisting crane when certain angle, so that balancing torque is carried out to quantitative conversion.In the present embodiment, with two groups of variable counterbalanced weight assemblies 110, two group indications 140 are set correspondingly.The indicating device 140 indication balancing torque corresponding with corresponding variable counterbalanced weight assembly 110 current locations.
Indicating device 140 comprises aforesaid calibrated disc 141 and pointer 142 particularly.The moment size of the scale counterbalanced weight 100 of calibrated disc 141.Pointer 142 arranges with interval with the surface of calibrated disc, pointer 142 has indication end and the coupling end being oppositely arranged, the connection of coupling end is centered close on the central axis of calibrated disc 141, and indication end indicates variable counterbalanced weight assembly 110 whether to turn to desired position.In the present embodiment, because calibrated disc 141 arranges regularly with respect to turning cylinder 111, so pointer 142 arranges regularly with respect to equilibrium arm 30.Certainly, in a further embodiment, also calibrated disc 141 can be set to pointer 142 is fixed with respect to turning cylinder with respect to crane arm 30 is fixing.
As shown in figure 10, in the present embodiment for the relative position between fixing variable counterbalanced weight and equilibrium arm, there is undesirable position with the variable counterbalanced weight that prevents from regulating and change in anchor fitting 130.Anchor fitting 130 comprises set collar 131 and fixed link assembly 133.Wherein, on each variable counterbalanced weight assembly 110, set collar 131 is set.Fixed link assembly 133 comprises respectively through the thread rod 133A of the set collar 131 on two variable counterbalanced weight assemblies 110 and lockout mechanism that thread rod 133A and corresponding set collar 131 are locked together.
Particularly, on each variable counterbalanced weight assembly 110, be fixedly installed a set collar 131, set collar 131 revolves to be located on corresponding variable counterbalanced weight assembly 110, anchor fitting 130 also comprises the lock nut of the relative angle of locking set collar 131 and variable counterbalanced weight assembly 110, and set collar 131 is beneficial to thread rod 133A according to the angle of the rotational angle change between variable counterbalanced weight assembly 110 and equilibrium arm 30 self and passes.After the conversion of moment each time, need to change the angle of set collar 131 and to the length of fixed link assembly 133 is regulated.In the present embodiment, set collar 131 is arranged at the upper surface of counterbalanced weight erecting frame 114.
Certainly, also can be fixedly installed a plurality of set collars 131 by the diverse location on each variable counterbalanced weight assembly 110, the thread rod 133A of fixed link assembly 133 selectively passes a set collar 131 in a plurality of set collars 131 on each variable counterbalanced weight assembly 110 according to the rotational angle between variable counterbalanced weight assembly 110 and equilibrium arm 30, to adapt to the change of variable counterbalanced weight assembly 110 rotational angles.
The lockout mechanism of fixed link assembly 133 comprises a plurality of bar cover 133B and two captive nut 133C.Thread rod 133A selectively penetrates the bar cover group of at least one bar cover 133B formation of a plurality of bar cover 133B successively according to the rotational angle between variable counterbalanced weight assembly 110 and equilibrium arm 30, thread rod 133A penetrates after set collar 131, between the set collar 131 of bar cover group on two variable counterbalanced weight assemblies 110 and two ends of bar cover group respectively with set collar 131 butts of corresponding one end.Two captive nut 133C revolve respectively the two ends of being located at thread rod 133A with by thread rod 133A and set collar 131 lockings.
In addition, lockout mechanism is not limited to this, can also a captive nut be respectively set in the both sides of each set collar 131 of thread rod 133A, also can realize the locking between thread rod 133A and set collar 131.
In the present embodiment, a plurality of bar cover 133B are set to respectively different length, to select the bar cover 133B of a corresponding length according to the different rotational angle of variable counterbalanced weight assembly 110.
In another example, a plurality of bar cover 133B also can be set to roughly the same length, the rotational angles different according to variable counterbalanced weight assembly 110 overlap the bar cover group of the synthetic different length of sets of numbers of 133B by select lever, bar is overlapped to the outside that group is enclosed within thread rod 133A, also can coordinate with captive nut 133C the object that reaches the position that limits set collar 133A.
And, as long as can the position after regulating the position between two variable counterbalanced weight assemblies 110 be fixed or respectively can be as anchor fitting of the present invention using the fixing anchor fitting of variable counterbalanced weight assembly 110 and equilibrium arm, and be not limited to the form of set collar and fixed link assembly.
The installation process of the counterbalanced weight 100 of the hoisting crane of the present embodiment is as follows: by meeting the cement concrete system of designing requirement or steel plate counterbalanced weight pouring weight 112 processed, pack counterbalanced weight erecting frame 114 into and make integral structure.During vertical tower by turning cylinder 111 installing tapered roller bearings and be installed on the end of equilibrium arm 30.Again two aforementioned integral structures are connected with the turning cylinder 111 of the both sides of the vertical longitudinal plane of symmetry of end of equilibrium arm 30 respectively.The top of counterbalanced weight pouring weight 112 is connected to form to complete variable counterbalanced weight assembly 110 by pouring weight pull bar 115 and the upper end of turning cylinder 111.On turning cylinder 111, weld the rotor wheel 121 of calibrated disc 141 and device of rotation driving 120.Assembling rotor wheel 121 and turning handle 122, turn to the variable counterbalanced weight assembly 110 of both sides the angle needing.Fixing device for installing 130 also guarantees that counterbalanced weight fixed link assembly 133 is fixed.
When tower crane is not worked, separation type counterbalanced weight can be adjusted to minimum balancing torque position, during work, launched, in whole use procedure, must guarantee that tapered roller bearing is lubricated good.
The moment balance method of the hoisting crane of the present embodiment comprises that the device of rotation driving 120 by hoisting crane drives variable counterbalanced weight that variable counterbalanced weight is rotated with respect to equilibrium arm 30, and by the counterbalanced weight of hoisting crane with respect to the torque adjusting of the tower body of hoisting crane to the level needing.Below with reference to Fig. 4, Fig. 7 to Fig. 9, illustrate the present embodiment hoisting crane moment balance method.
Fig. 4 is the structural representation of arranging along the bearing of trend of equilibrium arm according to the variable counterbalanced weight assembly of both sides in the counterbalanced weight of hoisting crane of the present invention, and now the variable counterbalanced weight assembly 110 of both sides fits together, and hoisting crane has maximum balancing torque.
Fig. 7 rotates the structural representation after 30 degree with respect to the bearing of trend of equilibrium arm to both sides respectively according to two groups of variable counterbalanced weight assemblies in the counterbalanced weight of hoisting crane of the present invention, and now the balancing torque of hoisting crane is between maximum balancing torque and intermediate equilibria moment.
Fig. 8 rotates the structural representation after 90 degree with respect to the bearing of trend of equilibrium arm to both sides respectively according to two groups of variable counterbalanced weight assemblies in the counterbalanced weight of hoisting crane of the present invention, and now the balancing torque of hoisting crane is roughly the intermediate equilibria moment in whole torque adiustment.
Fig. 9 turns to the structural representation of maximum angle with respect to the bearing of trend of equilibrium arm respectively according to two groups of variable counterbalanced weight assemblies in the counterbalanced weight of hoisting crane of the present invention to both sides, now hoisting crane has minimum balancing torque, variable counterbalanced weight assembly 110 is in full swing position, the side laminating of its lateral surface and equilibrium arm 30, thus fixed link assembly 133 is chosen suitable two variable counterbalanced weight assemblies 110 of length locking two variable counterbalanced weight assemblies 110 is fixed together with equilibrium arm 30.
When needing hoisting crane to there is maximum balancing torque, the variable counterbalanced weight assembly 110 of both sides is straightened completely, in the residing state of Fig. 4, and use the fixed link assembly 133 of anchor fitting 130 that the variable counterbalanced weight assembly 110 of both sides is locked.Now can, according to actual service condition, determine whether to increase anchor fitting 130 other anchor fitting in addition.And turning handle 122 can unload and be placed on equilibrium arm 30, avoid interfering with other parts.
When needs are adjusted balancing torque, need first unscrew the captive nut 133C on fixed link assembly 133, fixed link assembly 133 is disassembled.Upper and lower two tapered roller bearings of guaranteeing to be positioned on turning cylinder 111 are installed firm and can normally work, and the tapered roller bearing on turning cylinder 111 is added to lubricating oil.After definite variable counterbalanced weight assembly 110 can swing, determine the angle of required rotation while being adjusted to predetermined balancing torque, and fixed at the enterprising rower of calibrated disc 141.After demarcation completes, the connecting portion of turning handle 122 can be inserted in the suitable hollow circular-tube of rotor wheel 121.Stir turning handle 122, under the drive of device of rotation driving 120, variable counterbalanced weight assembly 110 laterally rotates, and when the angle of demarcating on calibrated disc 141 overlaps with rotational angle pointer 142, turning handle 122 stops operating.Turning handle 122 is pulled up, put into a hollow circular-tube of the rotor wheel 121 of opposite side, rotate after the angle of formed objects, turning handle 122 is pulled up.Rotation is installed on the set collar 131 on counterbalanced weight erecting frame 114, and tightens the lock nut coordinating with the thread segment of set collar 131, makes set collar 131 be parallel to the axis of equilibrium arm 30.Select the bar cover 133B of appropriate length to be inserted in thread rod 133A, form the fixed link assembly 133 being of convenient length.After definite set collar 131 fixedly secures, there is the thread rod 133A of bar cover 133B to pack between two groups of set collars 131 on variable counterbalanced weight assembly 110 in cover, and tighten captive nut 133C.After 133 installations of fixed link assembly, the conversion of balancing torque completes.
When needs are readjusted balancing torque again, repeat above-mentioned steps, according to the scale on calibrated disc 141, each variable counterbalanced weight assembly 110 is adjusted to assigned address, and the set collar 131 being arranged on counterbalanced weight erecting frame 114 is rotated, the bar cover 133B that changes appropriate length, re-starts fixing by variable counterbalanced weight assembly 110.
According to the difference of the rotational angle of variable counterbalanced weight assembly 110, the counterbalanced weight 100 of this hoisting crane can obtain the balancing torque of different sizes, while being positioned at end position as shown in Figure 9, variable counterbalanced weight assembly 110 will be close to the tail end of equilibrium arm 30, now can not produce any impact to the normal work of hoisting crane.
When if the balancing torque that variable counterbalanced weight assembly 110 produces in minimum arm of force position can not meet operating needs, now can consider to reduce the weight that is arranged on the counterbalanced weight pouring weight 112 in counterbalanced weight erecting frame 114, to obtain required balancing torque.
The present invention is not changing under the prerequisite of each component layouts such as main body mechanism on equilibrium arm 30, by device of rotation driving 120, drives variable counterbalanced weight can realize fast speed shifting balance moment; By the indication of indicating device 140, can be quantitative balancing torque is converted; By the set collar 131 of angle rotatable and the fixed link assembly 133 of adjustable length, can variable counterbalanced weight assembly 110 be fixed fast speed; The compactness rational in infrastructure of counterbalanced weight 100, and do not need to increase other driving power bag; Whole device and structure thereof can be improved stressed under off working state of tower body 50, can under the condition of not changing equilibrium arm 30, complete the conversion of balancing torque; Due to the setting of variable counterbalanced weight, make the total length of variable counterbalanced weight and equilibrium arm 30 variable, tower crane also can normally be used in the place of the restriction of having living space.
It should be noted that, above embodiment should not be construed as limiting the invention.For example:
In above embodiment, the variable counterbalanced weight assembly 110 of both sides rotates around turning cylinder 111 separately, yet, also a turning cylinder being fixedly connected with equilibrium arm afterbody can be only set, the position being connected with turning cylinder by the variable counterbalanced weight assembly of both sides is rationally set, make rotating connection of turning cylinder of counterbalanced weight erecting frame and this, and the variable counterbalanced weight assembly that the makes every side direct driven equilibrium of device of rotation driving separately re-mounts frame and rotate, also can realize variable counterbalanced weight with respect to the rotation of equilibrium arm.
In addition, in above embodiment, only the afterbody at equilibrium arm is provided with one group of variable counterbalanced weight, but, for the balancing torque to hoisting crane regulates more flexibly, the variable counterbalanced weight of many groups can be set, for example, except being arranged at one group of variable counterbalanced weight of equilibrium arm afterbody, can also arrange again one group of variable counterbalanced weight in the side, both sides of equilibrium arm.
In above embodiment, whole counterbalanceds weight is variable counterbalanced weight, still, also can only make a part for counterbalanced weight be set to variable counterbalanced weight, and remaining portion is set to fixed type counterbalanced weight.
Moreover device of rotation driving is M/C in above embodiment, but also can adopt driven by power or hydraulically powered mode to drive variable counterbalanced weight.
If adopt hydraulically powered mode to change the angle of variable counterbalanced weight, because hydraulic actuating cylinder itself can have lock function, now, just anchor fitting not necessarily, thereby can omit.
As can be seen from the above description, the above embodiments of the present invention have realized following technique effect:
By driving variable counterbalanced weight to rotate the adjusting of the balancing torque realize hoisting crane with respect to equilibrium arm, solve the problem of hoisting crane moment balance when the situations such as galianconism length, non-operating mode, balancing torque that can fast speed adjustment tower crane.
Reduced the operation that reconfigures counterbalanced weight or change equilibrium arm, while needing less moment, can not need to change the long equilibrium arm of galianconism by reduce counterbalanced weight weight and the balance arm of force is realized simultaneously, used more convenient, economical.
The total length of variable counterbalanced weight and equilibrium arm can convert, and the running of tower crane in the time of can meeting the narrow and small position of scope makes more convenient, the safety of tower crane running, and field of application is wider.
In changing the operating process of balancing torque, the balancing torque that obtains different sizes that can be quantitative by indicating device, the moment size converting is controlled, easy to operate.
Simple in structure, do not affect the layout of other parts on equilibrium arm, and do not increase other driving power bag.
Setting can be for convenience detach turning handle, can reach and change balancing torque size and labour-saving object, the running of other parts on counterbalanced weight is not exerted an influence simultaneously.
On counterbalanced weight erecting frame, the structure of the structure of set collar and bearing change mode and counterbalanced weight fixed link assembly meets the fixedly requirement of variable counterbalanced weight assembly on diverse location.
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 (14)
1. a counterbalanced weight for hoisting crane, is characterized in that, comprising:
Variable counterbalanced weight, described variable counterbalanced weight is arranged at the equilibrium arm (30) of described hoisting crane and goes up and arrange rotationally with respect to described equilibrium arm (30), with respect to the arm of force of the tower body (50) of described hoisting crane, the rotation with described variable counterbalanced weight changes described counterbalanced weight, described variable counterbalanced weight comprises two groups of variable counterbalanced weight assemblies (110) that lay respectively at the vertical centre plane both sides of described equilibrium arm (30), and described in two groups, variable counterbalanced weight assembly (110) rotates around vertical axis in the side at place separately respectively;
Device of rotation driving (120), is connected to drive described two groups of variable counterbalanced weight assemblies (110) with respect to described equilibrium arm (30), to rotate respectively with described variable counterbalanced weight
Anchor fitting (130), described anchor fitting is for the relative position between fixing described variable counterbalanced weight and described equilibrium arm (30).
2. the counterbalanced weight of hoisting crane according to claim 1, is characterized in that, described in every group, variable counterbalanced weight assembly (110) winding is placed in a vertical axis rotation of place one side; Described in two groups, variable counterbalanced weight assembly (110), two described vertical axis are symmetrical arranged with respect to the vertical centre plane of described equilibrium arm (30) respectively.
3. the counterbalanced weight of hoisting crane according to claim 2, is characterized in that, described in every group, variable counterbalanced weight assembly (110) comprising:
Turning cylinder (111), is vertically arranged at described equilibrium arm (30) rotationally with respect to described equilibrium arm (30) upper, and the central axis of described turning cylinder (111) forms described vertical axis;
Counterbalanced weight pouring weight (112), regularly setting relative to described turning cylinder (111).
4. the counterbalanced weight of hoisting crane according to claim 3, is characterized in that, described variable counterbalanced weight assembly (110) also comprises the bearing (113) being arranged between described equilibrium arm (30) and described turning cylinder (111).
5. the counterbalanced weight of hoisting crane according to claim 4, it is characterized in that, described variable counterbalanced weight assembly (110) also comprises counterbalanced weight erecting frame (114), and described counterbalanced weight pouring weight (112) is connected by described counterbalanced weight erecting frame (114) with described turning cylinder (111).
6. the counterbalanced weight of hoisting crane according to claim 5, it is characterized in that, described variable counterbalanced weight assembly (110) also comprises pouring weight pull bar (115), described pouring weight pull bar (115) is positioned at described counterbalanced weight erecting frame (114) top, the first end of described pouring weight pull bar (115) is connected with described counterbalanced weight pouring weight (112), and the second end of described pouring weight pull bar (115) is connected with described turning cylinder (111).
7. according to the counterbalanced weight of the hoisting crane described in any one in claim 3 to 6, it is characterized in that, described device of rotation driving (120) comprising:
Rotor wheel (121), comprises being a plurality ofly arranged at described turning cylinder (111) periphery and along the control lever radially extending of described turning cylinder (111);
Rotary handle (122), one end of described rotary handle (122) has the connecting portion being removably connected with the outer end of described control lever.
8. according to the counterbalanced weight of the hoisting crane described in any one in claim 1 to 6, it is characterized in that, described variable counterbalanced weight assembly (110) also comprises the indicating device (140) of the balancing torque that indication is corresponding with the current location of variable counterbalanced weight.
9. according to the counterbalanced weight of the hoisting crane described in any one in claim 3 to 6, it is characterized in that, described balance escheat comprises and the indicating device (140) of balancing torque corresponding to indication and corresponding variable counterbalanced weight assembly (110) current location of corresponding setting one by one of variable counterbalanced weight assembly (110) described in two groups, and described indicating device (140) comprising:
Calibrated disc (141), described calibrated disc (141) is for demarcating the size of the balancing torque of described hoisting crane;
Pointer (142), arrange with interval with the surface of described calibrated disc, described pointer (142) has indication end and the coupling end being oppositely arranged, the connection of described coupling end is centered close on the central axis of described calibrated disc (141), one on described calibrated disc (141) and described pointer (142) is fixedly installed with respect to described turning cylinder (111), and another is fixedly installed with respect to described equilibrium arm (30).
10. according to the counterbalanced weight of the hoisting crane described in any one in claim 1 to 6, it is characterized in that, described anchor fitting (130) comprising:
Set collar (131), arranges described set collar (131) on variable counterbalanced weight assembly (110) described in each;
Fixed link assembly (133), comprises respectively through the thread rod (133A) of the described set collar (131) on two described variable counterbalanced weight assemblies (110) and the lockout mechanism that described thread rod (133A) and corresponding described set collar (131) are locked together.
The counterbalanced weight of 11. hoisting cranes according to claim 10, it is characterized in that, a described set collar (131) is set on variable counterbalanced weight assembly (110) described in each, described set collar (131) comprises and revolves the thread segment of being located on corresponding variable counterbalanced weight assembly (110), described anchor fitting also comprises the described set collar of locking (131) and the lock nut coordinating with described thread segment of the relative angle of described variable counterbalanced weight assembly (110), the angle that described set collar (131) changes self according to the rotational angle between described variable counterbalanced weight assembly (110) and described equilibrium arm (30) is passed to be suitable for described thread rod (133A).
The counterbalanced weight of 12. hoisting cranes according to claim 10, is characterized in that, the described lockout mechanism of described fixed link assembly (133) comprising:
A plurality of bar covers (133B), at least one bar cover (133B) that described thread rod (133A) selectively penetrates described a plurality of bar covers (133B) according to described variable counterbalanced weight assembly (110) and rotational angle between described equilibrium arm (30) docks the bar cover group forming successively, described thread rod (133A) penetrates after described set collar (131), described bar cover group be positioned between the described set collar (131) on two described variable counterbalanced weight assemblies (110) and the two ends of described bar cover group respectively with described set collar (131) butt of corresponding one end;
Two captive nuts (133C), revolve respectively the two ends of being located at described thread rod (133A) with by described thread rod (133A) and described set collar (131) locking.
13. 1 kinds of hoisting cranes, comprise equilibrium arm (30) and are arranged at the counterbalanced weight on described equilibrium arm (30), it is characterized in that, described counterbalanced weight is according to the counterbalanced weight of the hoisting crane described in any one in claim 1 to 12.
The moment balance method of 14. 1 kinds of hoisting cranes according to claim 13, it is characterized in that, described moment balance method comprises: the device of rotation driving (120) by described hoisting crane drives described variable counterbalanced weight that described variable counterbalanced weight is rotated with respect to described equilibrium arm (30), and by the counterbalanced weight of described hoisting crane with respect to the torque adjusting of the tower body of described hoisting crane to the level needing.
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| CN201210559228.5A CN102992209B (en) | 2012-12-20 | 2012-12-20 | Balance weight of crane, crane and moment balancing method of crane |
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| CN201210559228.5A CN102992209B (en) | 2012-12-20 | 2012-12-20 | Balance weight of crane, crane and moment balancing method of crane |
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| CN102992209B true CN102992209B (en) | 2014-12-03 |
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| FR2077779B1 (en) * | 1970-02-13 | 1974-09-20 | Richier Sa | |
| DD275036A1 (en) * | 1988-08-25 | 1990-01-10 | Schwermasch Kirow Veb K | COMPONENT ARRANGEMENT FOR EXHAUST CRANES |
| DE4206630A1 (en) * | 1991-12-11 | 1993-06-17 | Ledergerber Hans Juergen | Slewing tower-crane assembly - has hoist rope coupled to counterweight moving in opposite direction to load on hook |
| US5609260A (en) * | 1996-02-05 | 1997-03-11 | Liao; Fu-Chang | Derrick structure |
| CN2649557Y (en) * | 2003-10-29 | 2004-10-20 | 赵元黎 | Flexible dragline tracting jibboom-changing crane |
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