CN103342295B - Tower crane, as well as amplitude variation mechanism and amplitude variation method thereof - Google Patents
Tower crane, as well as amplitude variation mechanism and amplitude variation method thereof Download PDFInfo
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- CN103342295B CN103342295B CN201310305572.6A CN201310305572A CN103342295B CN 103342295 B CN103342295 B CN 103342295B CN 201310305572 A CN201310305572 A CN 201310305572A CN 103342295 B CN103342295 B CN 103342295B
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Abstract
The invention provides a tower crane, as well as an amplitude variation mechanism and an amplitude variation method thereof. The amplitude variation mechanism comprises an amplitude variation motor, a guiding element, a moving counterweight, a counterweight drive rope and a drive roller. The drive roller is in drive connection with the amplitude variation motor. The guiding element is disposed below the amplitude variation motor in the vertical direction. The moving counterweight is matched with the guiding element and can move up and down along the guiding element. The counterweight drive rope is wound on the drive roller. The first end of the counterweight drive rope is connected with the upper end of the moving counterweight, while the second end of the counterweight drive rope is connected with the lower end of the moving counterweight. The moving counterweight comprises a counterweight object and an amplitude variation rope connecting part for being connected with the amplitude variation rope of the tower crane. According to the invention, the cost is low, the amplitude variation motor has low power, energy is saved, and economical efficiency is high.
Description
Technical field
The present invention relates to elevator machinery field, more specifically, relate to a kind of tower crane and luffing mechanism thereof and luffing method.
Background technology
As depicted in figs. 1 and 2, tower crane of the prior art (such as movable arm type tower machine) comprises crane arm 16, tower body 14, equilibrium arm 15, support 17(such as A cabinet frame) and range-changing mechanism etc., its luffing is next real primarily of swinging up and down of crane arm.Luffing mechanism comprises luffing motor 1 and amplitude-changing drum.The first end of crane arm 16 is connected pivotly with equilibrium arm 15, and its second end, by after luffing arm-tie 18 and variable amplitude rope 6, is connected with the amplitude-changing drum of luffing mechanism.
As shown in Figure 2, lifting mechanism, luffing mechanism, support 17, counterweight 22 etc. are arranged on equilibrium arm 15.When needing less work range, the amplitude-changing drum on luffing mechanism rotates, and makes variable amplitude rope 6 rope closing around thereon, so crane arm 16 is under the effect of variable amplitude rope 6, and the elevation angle becomes large, and namely its work range diminishes.When reaching required forced stroke, luffing mechanism stop motion, namely completes the change of amplitude.Needs use significantly swinging radius time, luffing mechanism puts rope, and crane arm 16, under the effect of self gravitation, declines gradually, work range increase.
As depicted in figs. 1 and 2, when using luffing mechanism of the prior art to carry out luffing, because the weight of crane arm 16 and lift heavy is larger, required luffing power of motor is very large, therefore can cause the volume of luffing mechanism and the bulky of reductor, this increases directly causing the cost of luffing mechanism.Meanwhile, because the parts arranged on equilibrium arm 15 are more, this can cause the length of equilibrium arm 15, tower crane can not be used, meanwhile, because luffing power is larger in some narrow and small working spaces, cause tower crane in use electric power expend comparatively large, economy is poor.
Summary of the invention
The present invention aims to provide that a kind of structure is simple, volume is little, cost is low, luffing power of motor is little, energy-conservation, the tower crane of good economy performance and luffing mechanism thereof and luffing method.
For solving the problems of the technologies described above, according to a first aspect of the invention, provide a kind of luffing mechanism of tower crane, comprising: luffing motor, guide, mobile counterweight, counterweight drive rope and driving rolls; Driving rolls drives with luffing motor and is connected; Guide is vertically arranged on the below of luffing motor; Mobile counterweight and guide part pair merge can along guide up-and-down movement; Counterweight drives rope around on driving rolls, and counterweight drives the first end of rope to be connected with the upper end of mobile counterweight, and counterweight drives the second end of rope to be connected with the lower end of mobile counterweight; Mobile counterweight comprises the variable amplitude rope connecting portion of balance weight body and the variable amplitude rope for being connected tower crane.
Whether further, luffing mechanism also comprises: abnormality detecting unit, abnormal for the motion detecting mobile counterweight; Brake equipment, is arranged on the side of driving rolls, for braking driving rolls; Control unit, is connected with abnormality detecting unit and brake equipment, and control unit, when abnormality detecting unit detects mobile counterweight dyskinesia, controls brake equipment and braked by driving rolls.
Further, abnormality detecting unit is force snesor, and when the impact that force snesor is subject to mobile counterweight is greater than predetermined value, control unit controls brake equipment and braked by driving rolls.
Further, luffing mechanism also comprises buffer cell and mobile counterweight block, and buffer cell is arranged on mobile counterweight block, and mobile counterweight block is arranged on the position corresponding with the forced stroke of mobile counterweight.
Further, luffing mechanism also comprises the driving angle pulley being positioned at side, guide lower end, and counterweight drives rope to walk around driving angle pulley.
Further, variable amplitude rope connecting portion comprises the counterweight pulley coordinated with variable amplitude rope, and counterweight pulley is connected pivotly with the balance weight body of mobile counterweight.
Further, mobile counterweight also comprises the guide part be connected with balance weight body, and guide is located in the pilot hole of guide part.
According to a second aspect of the invention, provide a kind of tower crane, comprising: tower body, equilibrium arm, crane arm, support, luffing arm-tie, variable amplitude rope and luffing mechanism, luffing mechanism is above-mentioned luffing mechanism; Equilibrium arm is fixedly connected with tower body, and the first end of crane arm is connected pivotly with equilibrium arm; Second end of crane arm is connected with the variable amplitude rope connecting portion of luffing mechanism by luffing arm-tie, variable amplitude rope successively; The luffing motor of luffing mechanism is arranged on the top of support.
Further, after the counterweight pulley of variable amplitude rope connecting portion is walked around in the end of variable amplitude rope, be fixedly connected with support.
Further, tower crane also comprises luffing roller and track adjusting wheel, and luffing roller and track adjusting wheel are arranged on the top of support, after variable amplitude rope walks around luffing roller and track adjusting wheel successively, is connected with variable amplitude rope connecting portion.
Further, variable amplitude rope is flat rope.
Further, the guide of luffing mechanism is between two rear poles of support.
Further, tower crane also comprises fixed weight, and fixed weight is arranged on equilibrium arm, and the total weight of fixed weight and mobile counterweight equals the balance weight needed for tower crane.
According to a third aspect of the present invention, provide a kind of luffing method of tower crane, comprising: provide luffing motor, guide, mobile counterweight, counterweight to drive rope and driving rolls; Driving rolls is driven with luffing motor and is connected; Guide is vertically arranged on the below of luffing motor; Mobile counterweight is coordinated with guide and installs, and make mobile counterweight can along guide up-and-down movement; Drive rope around on driving rolls counterweight, and counterweight drives the first end of rope to be connected with the upper end of mobile counterweight, counterweight drives the second end of rope to be connected with the lower end of mobile counterweight; The variable amplitude rope of tower crane is connected with mobile counterweight; In the work range process from large to small of tower crane, luffing motor drives rope to drive mobile counterweight to move downward by counterweight, and utilizes the deadweight of luffing motor and mobile counterweight to provide luffing power.
Further, luffing method also comprises: provide force snesor, when the impact that force snesor is subject to mobile counterweight is greater than predetermined value, is braked by driving rolls.
Further, a part in the balance weight needed for tower crane is separated as mobile counterweight.
In the process of luffing, variable amplitude rope is except being subject to the application force from luffing motor, also be subject to the application force of the deadweight from mobile counterweight, therefore, reduce the power of luffing motor, also reduce the volume of reductor, therefore, the present invention has that cost is low, luffing power of motor is little, energy-conservation, the feature of good economy performance simultaneously.
Accompanying drawing explanation
The accompanying drawing forming a application's part is used to provide a further understanding of the present invention, and schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 diagrammatically illustrates the structural representation of tower crane of the prior art;
Fig. 2 diagrammatically illustrates the partial enlarged drawing of Fig. 1;
Fig. 3 diagrammatically illustrates the schematic diagram when large work range of the tower crane in the present invention;
Fig. 4 diagrammatically illustrates the partial schematic diagram when little work range of the tower crane in the present invention;
Fig. 5 diagrammatically illustrates the schematic diagram of luffing mechanism when little work range in the present invention;
Fig. 6 diagrammatically illustrates luffing mechanism another schematic diagram when little work range in the present invention;
Fig. 7 diagrammatically illustrates the schematic diagram of luffing mechanism when large work range in the present invention;
Fig. 8 diagrammatically illustrates luffing mechanism another schematic diagram when large work range in the present invention;
Fig. 9 diagrammatically illustrates a schematic diagram of the luffing mechanism in the present invention;
Figure 10 diagrammatically illustrates another schematic diagram of the luffing mechanism in the present invention;
Figure 11 diagrammatically illustrates the scheme of installation of buffer cell and mobile counterweight block;
Figure 12 diagrammatically illustrates the scheme of installation between mobile counterweight and guide;
Figure 13 diagrammatically illustrates a connection diagram of counterweight pulley and variable amplitude rope;
Figure 14 diagrammatically illustrates another connection diagram of counterweight pulley and variable amplitude rope; And
Figure 15 diagrammatically illustrates the connection diagram of variable amplitude rope and luffing arm-tie.
Reference numeral in figure: 1, luffing motor; 2, guide; 3, mobile counterweight; 4, counterweight drives rope; 5, driving rolls; 6, variable amplitude rope; 7, abnormality detecting unit; 8, brake equipment; 9, buffer cell; 10, mobile counterweight block; 11, angle pulley is driven; 12, counterweight pulley; 13, guide part; 14, tower body; 15, equilibrium arm; 16, crane arm; 17, support; 18, luffing arm-tie; 19, luffing roller; 20, track adjusting wheel; 21, fixed weight; 22, counterweight; 23, erecting frame; 24, reductor; 25, joint.
Detailed description of the invention
Below in conjunction with accompanying drawing, embodiments of the invention are described in detail, but the multitude of different ways that the present invention can be defined by the claims and cover is implemented.
As a first aspect of the present invention, provide a kind of luffing mechanism of tower crane, especially, can be applicable to small-sized whip-typed tower crane.As shown in Fig. 3, Fig. 4 and Fig. 5, this luffing mechanism comprises: luffing motor 1, guide 2, mobile counterweight 3, counterweight drive rope 4 and driving rolls 5; Driving rolls 5 drives with luffing motor 1 and is connected; Guide 2 is vertically arranged on the below of luffing motor 1; Mobile counterweight 3 coordinates with guide 2 and can along guide 2 up-and-down movement; Counterweight drives rope 4 around on driving rolls 5, and counterweight drives the first end of rope 4 to be connected with the upper end of mobile counterweight 3, counterweight drives the second end of rope 4 to be connected with the lower end of mobile counterweight 3, like this, drive the both sides of rope 4 can synchronously carry out putting rope and rope closing around the counterweight on driving rolls 5, and drive the mobile counterweight 3 on it to rise or decline; Mobile counterweight 3 comprises the variable amplitude rope connecting portion of balance weight body and the variable amplitude rope 6 for being connected tower crane.Preferably, guide 2 can be guide rail etc.
Please refer to Fig. 5, Fig. 6 and Fig. 9, when needing the work range of tower crane from large to small, operation luffing motor 1 drives driving rolls 5 to rotate, thus drive drives the both sides of rope 4 synchronously to carry out putting rope and rope closing around counterweight thereon, so the mobile counterweight 3 driving rope 4 to be connected with counterweight moves downward.Because variable amplitude rope 6 is connected with mobile counterweight 3, therefore, when mobile counterweight 3 moves downward, variable amplitude rope 6 carries out rope closing operation, so crane arm 16 is upwards steeved, thus the work range of tower crane is diminished.In the process of luffing, variable amplitude rope 6 is except being subject to the application force from luffing motor 1, also be subject to the application force of the deadweight from mobile counterweight 3, therefore, reduce the power of luffing motor 1, also reduce the volume of reductor 24, therefore, the present invention has that cost is low, luffing power of motor is little, energy-conservation, the feature of good economy performance simultaneously.
Please refer to Fig. 7 to Fig. 9, when needing the work range of tower crane to change from small to big, operation luffing motor 1 drives driving rolls 5 to rotate backward, thus drive drives the both sides of rope 4 synchronously carry out rope closing and put rope around counterweight thereon, so the mobile counterweight 3 driving rope 4 to be connected with counterweight is along guide 2 upward movement.Crane arm 16 is under the effect of himself gravity, and the elevation angle diminishes lentamente.Because the elevation angle of crane arm 16 diminishes, the work range of tower crane becomes large, and when action is to required work range, luffing motor 1 shuts down.
Especially, because the power of luffing motor 1 is less, the size of luffing motor 1 and reductor 24 also diminishes, therefore, it can be arranged on the support 17(such as A cabinet frame of tower crane by erecting frame 23) head, to make the parts arranged on the equilibrium arm 15 of tower crane reduce, thus shorten the length of equilibrium arm 15 significantly.
In addition, because the present invention does not use amplitude-changing drum of the prior art, thus, the whole length of variable amplitude rope 6 all can be used as usable length, therefore not need amplitude-changing drum to hold rope, reduce cost of manufacture.
Because crane arm 16 weight with lift heavy is born primarily of variable amplitude rope 6, slip the phenomenon of rope if there is luffing mechanism, crane arm 16 will be made to drop, and then there is down the danger of tower in tower crane.Whether in order to address this problem, preferably, please refer to Fig. 5 to Figure 10, luffing mechanism also comprises: abnormality detecting unit 7, abnormal for the motion detecting mobile counterweight 3; Brake equipment 8, is arranged on the side of driving rolls 5, for braking driving rolls 5; Control unit, is connected with abnormality detecting unit 7 and brake equipment 8, and control unit, when abnormality detecting unit 7 detects mobile counterweight 3 dyskinesia, controls brake equipment 8 and braked by driving rolls 5.
Owing to being provided with the brake equipment 8 for emergency braking on driving rolls 5, therefore, when there is the anomalous behaviors such as crane arm 16 tenesmus, abnormality detecting unit 7 can detect exception in real time, and braked by control setup 8 pairs of driving rollss 5 in time, thus avoid the generation of story, improve the safety and reliability of system.In addition, when whip-typed tower crane does not need to carry out luffing, brake equipment 8 also can be utilized to brake.
Preferably, in one embodiment, abnormality detecting unit 7 is force snesor, and when the impact that force snesor is subject to mobile counterweight 3 is greater than predetermined value, control unit controls brake equipment 8 and braked by driving rolls 5.Obviously, abnormality detecting unit 7 also can be the sensor of other type, such as, can be speed sensor, when it detects that the speed of mobile counterweight 3 exceedes certain limit, namely think occur exception.
Preferably, please refer to Figure 11, luffing mechanism also comprises buffer cell 9 and mobile counterweight block 10, buffer cell 9 is arranged on mobile counterweight block 10, mobile counterweight block 10 is arranged on the position (end position of such as forced stroke) corresponding with the forced stroke of mobile counterweight 3, to cushion the impact force that mobile counterweight 3 operationally produces with other component contact.In addition, when there are the abnormal condition such as crane arm tenesmus, mobile counterweight 3 will contact with mobile counterweight block 10, thus prevents mobile counterweight 3 from going out forced stroke.
Such as, mobile counterweight block 10 can be arranged on the support 17(such as A cabinet frame of tower crane) head, preferably, abnormality detecting unit 7 can be triggered by buffer cell 9.Like this, when mobile counterweight 3 exceedes predetermined value with the impact force of buffer cell 9, brake equipment 8 action, thus pin driving rolls 5.
In addition, because mobile counterweight 3 must move in the forced stroke that it is predetermined, thus, at the destination county of the one or both sides of its mobile route, mobile counterweight block 10 and buffer cell 9 are set, and corresponding position detection unit (not shown) is set on mobile counterweight block 10, such as travel switch etc., the signal that position detection unit exports is supplied to control unit, thus the start and stop of luffing motor 1 can be controlled, thus reduce the possibility of crane arm 16 tenesmus.
Preferably, in normal luffing action, mobile counterweight 3 can not trigger the abnormality detecting unit 7(such as force snesor be arranged in buffer cell 9), therefore, the brake equipment 8 be arranged on driving rolls 5 is not braked, and the braking maneuver in working process completes primarily of luffing motor 1 and safety device thereof.When there are the abnormal condition such as crane arm tenesmus, when the value that abnormality detecting unit 7 gathers exceedes a certain predetermined value, signal transmission is to brake equipment 8, and now, brake equipment 8 action, with lock drive roller 5; Meanwhile, mobile counterweight block 10 can guarantee that the mobile counterweight 3 be connected with variable amplitude rope 6 does not go out its forced stroke, and the situation that this also prevents crane arm tenesmus occurs, for tower crane provides duplicate protection.
Preferably, please refer to Fig. 5 to Figure 11, luffing mechanism also comprises the driving angle pulley 11 being positioned at side, guide 2 lower end, and counterweight drives rope 4 to walk around and drives angle pulley 11, thus improves the motion credibility that counterweight drives rope 4.
Preferably, please refer to Figure 12, mobile counterweight 3 also comprises the guide part 13 be connected with balance weight body, and guide 2 is located in the pilot hole of guide part 13.Guide 2 ensure that mobile counterweight 3 can only move up and down along it in work amplitude changing process, improves safety.Preferably, according to the size of friction force between guide part 13 and guide 2, plain bearing can be set in guide part 13.
Please refer to Figure 13 and Figure 14, if the forced stroke of mobile counterweight 3 is less than the variation length of variable amplitude rope 6 in amplitude changing process, preferably, variable amplitude rope connecting portion comprises the counterweight pulley 12 coordinated with variable amplitude rope 6, and counterweight pulley 12 is connected pivotly with the balance weight body of mobile counterweight 3.Now, the end of variable amplitude rope 6 can be fixed on the variable amplitude rope end fixed point being positioned at support 17 top, and now, expansion is twice by the forced stroke of variable amplitude rope 6.Correspondingly, the weight of mobile counterweight 3 must at this moment suitably be increased.
As a second aspect of the present invention, provide a kind of tower crane, comprising: tower body 14, equilibrium arm 15, crane arm 16, support 17, luffing arm-tie 18, variable amplitude rope 6 and luffing mechanism.Wherein, this luffing mechanism is above-mentioned luffing mechanism; Equilibrium arm 15 is fixedly connected with tower body 14, and the first end of crane arm 16 is connected pivotly with equilibrium arm 15; Second end of crane arm 16 is connected with the variable amplitude rope connecting portion of luffing mechanism by luffing arm-tie 18, variable amplitude rope 6 successively; The luffing motor 1 of luffing mechanism is arranged on the top of support 17.Preferably, the guide 2 of luffing mechanism is between two rear poles of support 17.
Preferably, after the counterweight pulley 12 of variable amplitude rope connecting portion is walked around in the end of variable amplitude rope 6, be fixedly connected with support 17.Now, the end of variable amplitude rope 6 can be fixed on the variable amplitude rope end fixed point being positioned at support 17 top, and now, expansion is twice by the forced stroke of variable amplitude rope 6.Correspondingly, the weight of mobile counterweight 3 must at this moment suitably be increased.
Preferably, tower crane also comprises luffing roller 19 and track adjusting wheel 20, and luffing roller 19 and track adjusting wheel 20 are arranged on the top of support 17, and variable amplitude rope 6 is connected with variable amplitude rope connecting portion after walking around luffing roller 19 and track adjusting wheel 20 successively.Preferably, variable amplitude rope 6 is walked around below track adjusting wheel 20, and is pressed on luffing roller 19.In the front side of luffing roller 19, track adjusting wheel 20 is set, variable amplitude rope 6 is walked around track adjusting wheel 20 contact with luffing roller 19 again, track adjusting wheel 20 can be utilized to ensure, and crane arm 16 is when big-elevation, and variable amplitude rope 6 contacts well with luffing roller 19, thus ensure that the use safety of tower crane.
Preferably, variable amplitude rope 6 is flat ropes.Please refer to Figure 15, one end of variable amplitude rope 6 is connected with luffing arm-tie 18 by joint 25, and the other end is walked around luffing roller 19 and is connected with mobile counterweight 3.Because the luffing mechanism in the present invention is not by the restriction of pulley groove, therefore, variable amplitude rope 6 can be arranged to single rope steel rope group, also can use the flat-shaped material that pulling strengrth is higher, to improve the tension safety of variable amplitude rope, reduce the potentially danger of variable amplitude rope fracture.Meanwhile, use the variable amplitude rope 6 of large width to substitute steel rope, can reduce costs, improve the running safety of luffing mechanism.
Preferably, tower crane also comprises fixed weight 21, and fixed weight 21 is arranged on equilibrium arm 15, and the total weight of fixed weight 21 and mobile counterweight 3 equals the balance weight needed for tower crane.
As a third aspect of the present invention, provide a kind of luffing method of tower crane, comprising: provide luffing motor 1, guide 2, mobile counterweight 3, counterweight to drive rope 4 and driving rolls 5; Driving rolls 5 is driven with luffing motor 1 and is connected; Guide 2 is vertically arranged on the below of luffing motor 1; Mobile counterweight 3 is coordinated installation with guide 2, and makes mobile counterweight 3 can along guide 2 up-and-down movement; Counterweight driven rope 4 around on driving rolls 5, and counterweight drives the first end of rope 4 to be connected with the upper end of mobile counterweight 3, counterweight drives the second end of rope 4 to be connected with the lower end of mobile counterweight 3; The variable amplitude rope 6 of tower crane is connected with mobile counterweight 3; In the work range process from large to small of tower crane, luffing motor 1 drives rope 4 to drive mobile counterweight 3 to move downward by counterweight, and utilizes the deadweight of luffing motor and mobile counterweight 3 to provide luffing power.
Preferably, luffing method also comprises: provide force snesor, when the impact that force snesor is subject to mobile counterweight 3 is greater than predetermined value, is braked by driving rolls 5.
Preferably, a part in the balance weight needed for tower crane is separated as mobile counterweight 3.
The present invention is under the prerequisite not increasing component weight and cost, by mobile counterweight 3 isolated from fixed weight, by its Action of Gravity Field, significantly can reduce the rating horsepower of luffing mechanism, reduce cost, reducing due to luffing mechanism volume, can be arranged in the top of A cabinet frame simultaneously, this improves equilibrium arm upper-part greatly and arranges crowded phenomenon, and the length of equilibrium arm can significantly be shortened.
Due to different from the principle of work of existing luffing mechanism, invent and can remove these parts of amplitude-changing drum of the prior art.Therefore, variable amplitude rope 6 by the restriction of pulley groove, and can not can be replaced with wider width, the good variable amplitude rope of pull resistance by its variable amplitude rope as required, thus adds the safety of luffing mechanism.In addition, because variable amplitude rope 6 is connected with mobile counterweight 3, and the operating path of mobile counterweight 3 has been determined, therefore, has stopped to rupture the potential danger causing crane arm to drop due to variable amplitude rope 6.
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 amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (16)
1. the luffing mechanism of a tower crane, comprise: luffing motor (1) and driving rolls (5), described driving rolls (5) drives with described luffing motor (1) and is connected, it is characterized in that, the luffing mechanism of described tower crane also comprises guide (2), mobile counterweight (3) and counterweight and drives rope (4);
Described guide (2) is vertically arranged on the below of described luffing motor (1); Described mobile counterweight (3) coordinates with described guide (2) and can along described guide (2) up-and-down movement;
Described counterweight drives rope (4) around on described driving rolls (5), and described counterweight drives the first end of rope (4) to be connected with the upper end of described mobile counterweight (3), described counterweight drives the second end of rope (4) to be connected with the lower end of described mobile counterweight (3);
Described mobile counterweight (3) comprises the variable amplitude rope connecting portion of balance weight body and the variable amplitude rope (6) for being connected described tower crane.
2. luffing mechanism according to claim 1, is characterized in that, described luffing mechanism also comprises:
Abnormality detecting unit (7), whether abnormal for the motion detecting described mobile counterweight (3);
Brake equipment (8), is arranged on the side of described driving rolls (5), for braking described driving rolls (5);
Control unit, be connected with described abnormality detecting unit (7) and described brake equipment (8), described control unit, when described abnormality detecting unit (7) detects described mobile counterweight (3) dyskinesia, controls described brake equipment (8) and is braked by described driving rolls (5).
3. luffing mechanism according to claim 2, it is characterized in that, described abnormality detecting unit (7) is force snesor, when the impact that described force snesor is subject to described mobile counterweight (3) is greater than predetermined value, described control unit controls described brake equipment (8) and is braked by described driving rolls (5).
4. luffing mechanism according to claim 1, it is characterized in that, described luffing mechanism also comprises buffer cell (9) and mobile counterweight block (10), described buffer cell (9) is arranged on described mobile counterweight block (10), and described mobile counterweight block (10) is arranged on the position corresponding with the forced stroke of described mobile counterweight (3).
5. luffing mechanism according to claim 1, it is characterized in that, described luffing mechanism also comprises the driving angle pulley (11) being positioned at described guide (2) side, lower end, and described counterweight drives rope (4) to walk around described driving angle pulley (11).
6. luffing mechanism according to claim 1, it is characterized in that, described variable amplitude rope connecting portion comprises the counterweight pulley (12) coordinated with described variable amplitude rope (6), and described counterweight pulley (12) is connected pivotly with the balance weight body of described mobile counterweight (3).
7. luffing mechanism according to claim 1, it is characterized in that, described mobile counterweight (3) also comprises the guide part (13) be connected with described balance weight body, and described guide (2) is located in the pilot hole of described guide part (13).
8. a tower crane, comprise: tower body (14), equilibrium arm (15), crane arm (16), support (17), luffing arm-tie (18), variable amplitude rope (6) and luffing mechanism, it is characterized in that, described luffing mechanism is the luffing mechanism according to any one of claim 1 to 7;
Described equilibrium arm (15) is fixedly connected with described tower body (14), and the first end of described crane arm (16) is connected pivotly with described equilibrium arm (15); Second end of described crane arm (16) is connected with the variable amplitude rope connecting portion of described luffing mechanism by described luffing arm-tie (18), described variable amplitude rope (6) successively; The luffing motor (1) of described luffing mechanism is arranged on the top of described support (17).
9. tower crane according to claim 8, is characterized in that, after the counterweight pulley (12) of described variable amplitude rope connecting portion is walked around in the end of described variable amplitude rope (6), is fixedly connected with described support (17).
10. tower crane according to claim 8, it is characterized in that, described tower crane also comprises luffing roller (19) and track adjusting wheel (20), described luffing roller (19) and track adjusting wheel (20) are arranged on the top of described support (17), described variable amplitude rope (6) is connected with described variable amplitude rope connecting portion after walking around described luffing roller (19) and track adjusting wheel (20) successively.
11. tower cranes according to claim 8, is characterized in that, described variable amplitude rope (6) is flat rope.
12. tower cranes according to claim 8, is characterized in that, the guide (2) of described luffing mechanism is positioned between two rear poles of described support (17).
13. tower cranes according to claim 8, it is characterized in that, described tower crane also comprises fixed weight (21), described fixed weight (21) is arranged on described equilibrium arm (15), and the total weight of described fixed weight (21) and described mobile counterweight (3) equals the balance weight needed for described tower crane.
The luffing method of 14. 1 kinds of tower cranes, is characterized in that, comprising:
Luffing motor (1), guide (2), mobile counterweight (3), counterweight is provided to drive rope (4) and driving rolls (5);
Described driving rolls (5) is driven with described luffing motor (1) and is connected;
Described guide (2) is vertically arranged on the below of described luffing motor (1);
Described mobile counterweight (3) is coordinated with described guide (2) and installs, and make described mobile counterweight (3) can along described guide (2) up-and-down movement;
Drive rope (4) around on described driving rolls (5) described counterweight, and described counterweight drives the first end of rope (4) to be connected with the upper end of described mobile counterweight (3), described counterweight drives the second end of rope (4) to be connected with the lower end of described mobile counterweight (3);
The variable amplitude rope (6) of described tower crane is connected with described mobile counterweight (3);
In the work range process from large to small of described tower crane, described luffing motor (1) drives rope (4) to drive described mobile counterweight (3) to move downward by described counterweight, and utilizes the deadweight of described luffing motor and described mobile counterweight (3) to provide luffing power.
15. luffing methods according to claim 14, is characterized in that, described luffing method also comprises:
Force snesor is provided, when the impact that described force snesor is subject to described mobile counterweight (3) is greater than predetermined value, described driving rolls (5) is braked.
16. luffing methods according to claim 14, is characterized in that, separate a part in the balance weight needed for described tower crane as described mobile counterweight (3).
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| CN201310305572.6A CN103342295B (en) | 2013-07-19 | 2013-07-19 | Tower crane, as well as amplitude variation mechanism and amplitude variation method thereof |
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| CN201310305572.6A CN103342295B (en) | 2013-07-19 | 2013-07-19 | Tower crane, as well as amplitude variation mechanism and amplitude variation method thereof |
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|---|---|---|---|---|
| CN103663189B (en) * | 2014-01-02 | 2015-06-17 | 中联重科股份有限公司 | Moving arm tower crane installation method |
| CN106915699A (en) * | 2017-04-27 | 2017-07-04 | 合肥智慧龙图腾知识产权股份有限公司 | A kind of architectural engineering tower crane with lock function |
| CN107381370A (en) * | 2017-09-19 | 2017-11-24 | 安徽骏达起重机械有限公司 | Multiple scalable boom cranes |
| CN107601297A (en) * | 2017-09-19 | 2018-01-19 | 安徽骏达起重机械有限公司 | Overturning-preventing derrick crane |
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| FR2813298B1 (en) * | 2000-08-30 | 2002-10-25 | Potain Sa | DISTRIBUTION CABLE CIRCUIT FOR TOWER CRANE |
| DE102007019747B4 (en) * | 2007-04-20 | 2009-02-05 | Wilbert Turmkrane Gmbh | Luffing crane with transport bracket for roller blocks |
| CN201647847U (en) * | 2009-07-23 | 2010-11-24 | 中昇建机(南京)重工有限公司 | Special crane for hoisting wind power equipment |
| CN201901539U (en) * | 2010-09-27 | 2011-07-20 | 中昇建机(南京)重工有限公司 | Internal climbing type and external climbing type tower crane with luffing jib |
| CN102303821B (en) * | 2011-08-24 | 2013-06-05 | 江运金 | Luffing tower crane with balanced type suspension arm based on traction luffing of steel rope |
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