CN103342295A - Tower crane and luffing mechanism and luffing method thereof - Google Patents
Tower crane and luffing mechanism and luffing method thereof Download PDFInfo
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- CN103342295A CN103342295A CN2013103055726A CN201310305572A CN103342295A CN 103342295 A CN103342295 A CN 103342295A CN 2013103055726 A CN2013103055726 A CN 2013103055726A CN 201310305572 A CN201310305572 A CN 201310305572A CN 103342295 A CN103342295 A CN 103342295A
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- 230000007246 mechanism Effects 0.000 title claims abstract description 66
- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000001514 detection method Methods 0.000 claims description 23
- 230000005856 abnormality Effects 0.000 claims description 18
- 230000008569 process Effects 0.000 claims description 8
- 238000009434 installation Methods 0.000 claims description 5
- 208000012661 Dyskinesia Diseases 0.000 claims description 3
- 206010057071 Rectal tenesmus Diseases 0.000 description 6
- 208000012271 tenesmus Diseases 0.000 description 6
- 230000009471 action Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000004134 energy conservation Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 2
- 230000003139 buffering effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000002547 anomalous effect Effects 0.000 description 1
- 230000006399 behavior Effects 0.000 description 1
- 230000003292 diminished effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
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Abstract
The invention provides a tower crane, a luffing mechanism thereof and a luffing method. The luffing mechanism comprises: the device comprises a variable amplitude motor, a guide piece, a movable counterweight, a counterweight driving rope and a driving roller; the driving roller is in driving connection with the amplitude variation motor; the guide piece is arranged below the amplitude variation motor along the vertical direction; the movable balance weight is matched with the guide piece and can move up and down along the guide piece; the counterweight driving rope is wound on the driving roller, the first end of the counterweight driving rope is connected with the upper end of the movable counterweight, and the second end of the counterweight driving rope is connected with the lower end of the movable counterweight; the movable counterweight comprises a counterweight body and a luffing rope connecting part for connecting a luffing rope of the tower crane. The invention has the characteristics of low cost, small power of the variable amplitude motor, energy saving and good economical efficiency.
Description
Technical field
The present invention relates to the 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 (for example movable arm type tower machine) comprises for example A cabinet frame of crane arm 16, body of the tower 14, equilibrium arm 15, support 17() and luffing machinery etc., its luffing is mainly next real by swinging up and down of crane arm.Luffing mechanism comprises luffing motor 1 and amplitude-changing drum.First end of crane arm 16 is connected pivotly with equilibrium arm 15, and its second end is connected with the amplitude-changing drum of luffing mechanism after passing through luffing arm-tie 18 and luffing rope 6.
As shown in Figure 2, lifting mechanism, luffing mechanism, support 17, counterweight 22 etc. are installed on the equilibrium arm 15.When the less work range of needs, the amplitude-changing drum rotation on the luffing mechanism makes around luffing rope 6 thereon and receives rope, so crane arm 16 is under the effect of luffing rope 6, it is big that the elevation angle becomes, and namely its work range diminishes.When reaching required forced stroke, the variation of amplitude is namely finished in the luffing mechanism stop motion.When needs used significantly swinging radius, luffing mechanism was put rope, and crane arm 16 descends under the effect of self gravitation gradually, and work range increases.
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 bigger, needed luffing power of motor is very big, therefore can cause the bulky of the volume of luffing mechanism and reductor, this will directly cause the cost of luffing mechanism to increase.Simultaneously, because more at the parts of equilibrium arm 15 layouts, this can cause the length of equilibrium arm 15 elongated, make tower crane can not use in some narrow and small working spaces, simultaneously, because luffing power is bigger, cause tower crane in use electric power expend greatlyyer, economy is relatively poor.
Summary of the invention
The present invention aim to provide a kind of simple in structure, volume is little, cost is low, the luffing power of motor is little, energy-conservation, the tower crane of good economy performance and luffing mechanism 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 is connected with the luffing motor-driven; Guide vertically is arranged on the below of luffing motor; Mobile counterweight and guide part pair merge can be along the guide up-and-down movement; Counterweight drives rope on driving rolls, and first end that counterweight drives rope is connected with the upper end of mobile counterweight, and second end that the counterweight driving is restricted is connected with the lower end of mobile counterweight; Mobile counterweight comprises the luffing rope connecting portion of balance weight body and the luffing rope that is used for being connected tower crane.
Further, luffing mechanism also comprises: the abnormality detection unit, and whether unusual for detection of the motion of mobile counterweight; Brake equipment is installed in a side of driving rolls, is used for driving rolls is braked; Control unit is connected with brake equipment with the abnormality detection unit, and when control unit detected the mobile counterweight dyskinesia in the abnormality detection unit, the control brake equipment was braked driving rolls.
Further, the abnormality detection unit is the power sensor, and the impact that is subjected to mobile counterweight when the power sensor is during greater than predetermined value, and control unit control brake equipment is braked driving rolls.
Further, luffing mechanism also comprises buffer cell and mobile counterweight block, and buffer cell is installed on the mobile counterweight block, and the 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 that is positioned at guide lower end one side, and counterweight drives rope and walks around the driving angle pulley.
Further, luffing rope connecting portion comprises the counterweight pulley that cooperates with the luffing rope, and the counterweight pulley is connected pivotly with the balance weight body of mobile counterweight.
Further, mobile counterweight also comprises the guide part that is 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, having comprised: body of the tower, equilibrium arm, crane arm, support, luffing arm-tie, luffing rope and luffing mechanism, luffing mechanism are above-mentioned luffing mechanisms; Equilibrium arm is captiveed joint with body of the tower, and first end of crane arm is connected pivotly with equilibrium arm; Second end of crane arm is connected with the luffing rope connecting portion of luffing mechanism by luffing arm-tie, luffing rope successively; The luffing motor of luffing mechanism is installed in the top of support.
Further, captive joint with support after walking around the counterweight pulley of luffing rope connecting portion in the end of luffing rope.
Further, tower crane also comprises luffing roller and track adjusting wheel, and luffing roller and track adjusting wheel are installed in the top of support, after the luffing rope is walked around luffing roller and track adjusting wheel successively, is connected with luffing rope connecting portion.
Further, the luffing 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 installed on the equilibrium arm, and the total weight of fixed weight and mobile counterweight equals the required counterweight weight of tower crane.
According to a third aspect of the present invention, provide a kind of luffing method of tower crane, having comprised: provide luffing motor, guide, mobile counterweight, counterweight to drive rope and driving rolls; Driving rolls is connected with the luffing motor-driven; Guide vertically is arranged on the below of luffing motor; Mobile counterweight is cooperated installation with guide, and make the mobile counterweight can be along the guide up-and-down movement; Counterweight is driven rope on driving rolls, and first end that counterweight drives rope is connected with the upper end of mobile counterweight, second end that the counterweight driving is restricted is connected with the lower end of mobile counterweight; The luffing rope of tower crane is connected with mobile counterweight; In the work range process from large to small of tower crane, the luffing motor drives rope driving mobile counterweight by counterweight and moves downward, and utilizes the deadweight of luffing motor and mobile counterweight that luffing power is provided.
Further, the luffing method also comprises: the power sensor is provided, and the impact that is subjected to mobile counterweight when the power sensor is braked driving rolls during greater than predetermined value.
Further, a part is separated as mobile counterweight in the counterweight weight that tower crane is required.
In the process of luffing, the luffing rope is except being subjected to the application force from the luffing motor, also be subjected to the application force from the deadweight of mobile counterweight, therefore, reduced the power of luffing motor, also reduced simultaneously the volume of reductor, therefore, the present invention has that cost is low, the luffing power of motor is little, energy-conservation, the characteristics of good economy performance.
Description of drawings
The accompanying drawing that constitutes the application's a part is used to provide further understanding of the present invention, and illustrative examples of the present invention and explanation thereof are used for explaining the present invention, do not constitute improper restriction of the present invention.In the accompanying drawings:
Fig. 1 has schematically shown the structural representation of tower crane of the prior art;
Fig. 2 has schematically shown the partial enlarged drawing of Fig. 1;
Fig. 3 has schematically shown the scheme drawing when big work range of the tower crane among the present invention;
Fig. 4 has schematically shown the partial schematic diagram when little work range of the tower crane among the present invention;
Fig. 5 has schematically shown the scheme drawing of the luffing mechanism among the present invention when little work range;
Fig. 6 has schematically shown another scheme drawing when little work range of the luffing mechanism among the present invention;
Fig. 7 has schematically shown the scheme drawing of the luffing mechanism among the present invention when big work range;
Fig. 8 has schematically shown another scheme drawing when big work range of the luffing mechanism among the present invention;
Fig. 9 has schematically shown a scheme drawing of the luffing mechanism among the present invention;
Figure 10 has schematically shown another scheme drawing of the luffing mechanism among the present invention;
Figure 11 has schematically shown the scheme of installation of buffer cell and mobile counterweight block;
Figure 12 has schematically shown the scheme of installation between mobile counterweight and the guide;
Figure 13 has schematically shown a connection diagram of counterweight pulley and luffing rope;
Figure 14 has schematically shown another connection diagram of counterweight pulley and luffing rope; And
Figure 15 has schematically shown the connection diagram of luffing rope and luffing arm-tie.
Reference numeral among the figure: 1, luffing motor; 2, guide; 3, mobile counterweight; 4, counterweight drives rope; 5, driving rolls; 6, luffing rope; 7, abnormality detection unit; 8, brake equipment; 9, buffer cell; 10, mobile counterweight block; 11, drive angle pulley; 12, counterweight pulley; 13, guide part; 14, body of the tower; 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.
The specific embodiment
Below in conjunction with accompanying drawing embodiments of the invention are elaborated, 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, a kind of luffing mechanism of tower crane is provided, especially, can be applicable to small-sized whip-typed tower crane.As Fig. 3, Fig. 4 and shown in Figure 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 vertically is arranged on the below of luffing motor 1; Mobile counterweight 3 cooperates with guide 2 and can be along guide 2 up-and-down movement; Counterweight drives rope 4 on driving rolls 5, and first end that counterweight drives rope 4 is connected with the upper end of mobile counterweight 3, second end that counterweight drives rope 4 is connected with the lower end of mobile counterweight 3, like this, the both sides that counterweight on the driving rolls 5 drives rope 4 can synchronously be put rope and be received rope, and the mobile counterweight 3 that drives on it rises or descends; Mobile counterweight 3 comprises the luffing rope connecting portion of balance weight body and the luffing rope 6 that is used for being connected tower crane.Preferably, guide 2 can be guide rail etc.
Please refer to Fig. 5, Fig. 6 and Fig. 9, when need be with the work range of tower crane from large to small the time, operation luffing motor 1 drives driving rolls 5 and rotates, synchronously put rope and receive rope thereby drive around the both sides that thereon counterweight drives rope 4, so, drive rope 4 mobile counterweights that are connected 3 with counterweight and move downward.Because luffing rope 6 is connected with mobile counterweight 3, therefore, when mobile counterweight 3 moved downward, luffing rope 6 was received rop exercise and is done, so crane arm 16 is upwards steeved, thereby the work range of tower crane is diminished.In the process of luffing, luffing rope 6 is except being subjected to the application force from luffing motor 1, also be subjected to the application force from the deadweight of mobile counterweight 3, therefore, reduced the power of luffing motor 1, also reduced simultaneously the volume of reductor 24, therefore, the present invention has that cost is low, the luffing power of motor is little, energy-conservation, the characteristics of good economy performance.
Please refer to Fig. 7 to Fig. 9, in the time the work range of tower crane need being changed from small to big, operation luffing motor 1 drives driving rolls 5 backward rotation, synchronously receive rope and put rope thereby drive around the both sides that thereon counterweight drives rope 4, so, drive rope 4 mobile counterweights that are connected 3 along guide 2 upward movements with counterweight.16 of crane arms are under the effect of himself gravity, and the elevation angle diminishes lentamente.Because the elevation angle of crane arm 16 diminishes, it is big that the work range of tower crane becomes, and when required work range was arrived in action, luffing motor 1 shut down.
Especially, because the power of luffing motor 1 is less, the size of luffing motor 1 and reductor 24 also diminishes, therefore, can be with its support 17(that is installed in tower crane by erecting frame 23 A cabinet frame for example) head, so that the parts of arranging at the equilibrium arm 15 of tower crane reduce, thereby shorten the length of equilibrium arm 15 significantly.
In addition, because the present invention does not use amplitude-changing drum of the prior art, thereby, the whole length of luffing rope 6 all can be used as usable length, so do not need amplitude-changing drum to hold rope, reduced cost of manufacture.
Because crane arm 16 is mainly born by luffing rope 6 with the weight of lift heavy, if the phenomenon of luffing mechanism slide rope will make crane arm 16 drop, then there is down the danger of tower in tower crane.In order to address this problem, preferably, please refer to Fig. 5 to Figure 10, luffing mechanism also comprises: abnormality detection unit 7, whether unusual for detection of the motion of mobile counterweight 3; Brake equipment 8 is installed in a side of driving rolls 5, is used for driving rolls 5 brakings; Control unit is connected with brake equipment 8 with abnormality detection unit 7, and when control unit detected mobile counterweight 3 dyskinesias in abnormality detection unit 7, control brake equipment 8 was with driving rolls 5 brakings.
Because the brake equipment 8 that is used for emergency braking has been installed at driving rolls 5, therefore, when anomalous behaviors such as crane arm 16 tenesmus occurring, abnormality detection unit 7 can detect unusually in real time, and in time by 5 brakings of 8 pairs of driving rollss of control setup, thereby avoided the generation of story, improved safety and the reliability of system.In addition, when whip-typed tower crane does not need to carry out luffing, also can utilize brake equipment 8 to brake.
Preferably, in one embodiment, abnormality detection unit 7 is power sensors, and the impact that is subjected to mobile counterweight 3 when the power sensor is during greater than predetermined value, and control unit control brake equipment 8 is with driving rolls 5 brakings.Obviously, abnormality detection unit 7 also can be the sensor of other type, for example, can be speed sensor, when its speed that detects mobile counterweight 3 surpasses certain limit, namely thinks take place unusual.
Preferably, please refer to Figure 11, luffing mechanism also comprises buffer cell 9 and mobile counterweight block 10, buffer cell 9 is installed on the mobile counterweight block 10, mobile counterweight block 10 is arranged on the position corresponding with the forced stroke of mobile counterweight 3 (for example end position of forced stroke), contacts the impact force of generation when working with other parts with buffering mobile counterweight 3.In addition, when abnormal condition such as crane arm tenesmus occurring, mobile counterweight 3 will contact with mobile counterweight block 10, thereby prevents that mobile counterweight 3 from going out forced stroke.
For example, the support 17(that mobile counterweight block 10 can be installed in tower crane is the A cabinet frame for example) head, preferably, abnormality detection unit 7 can be triggered by buffer cell 9.Like this, when the impact force of mobile counterweight 3 and buffer cell 9 surpasses predetermined value, brake equipment 8 actions, thus pin driving rolls 5.
In addition, because mobile counterweight 3 must move in its predetermined forced stroke, thereby, destination county in the one or both sides of its mobile route arranges mobile counterweight block 10 and buffering unit 9, and at mobile counterweight block 10 corresponding position detection unit (not shown) being set, travel switch etc. for example offers control unit with the signal of position detection unit output, thereby can control the start and stop of luffing motor 1, thereby reduce the possibility of crane arm 16 tenesmus.
Preferably, in the normal luffing action, mobile counterweight 3 can not trigger for example power sensor of the abnormality detection unit 7(that is installed in the buffer cell 9), therefore, the brake equipment 8 that is installed on the driving rolls 5 is not braked, and the braking maneuver in the working process is mainly finished by luffing motor 1 and safety device thereof.When abnormal condition such as crane arm tenesmus occurring, when the value that abnormality detection unit 7 is gathered surpassed a certain predetermined value, signal was passed to brake equipment 8, and at this moment, brake equipment 8 actions are with lock drive roller 5; Simultaneously, mobile counterweight block 10 can guarantee that the mobile counterweight 3 that is connected with luffing rope 6 do not go out its forced stroke, and this situation that has also prevented the crane arm tenesmus takes place, for tower crane provides duplicate protection.
Preferably, please refer to Fig. 5 to Figure 11, luffing mechanism also comprises the driving angle pulley 11 that is positioned at guide 2 lower ends one side, and counterweight drives rope 4 and walks around driving angle pulley 11, thereby has improved the motion credibility of counterweight driving rope 4.
Preferably, please refer to Figure 12, mobile counterweight 3 also comprises the guide part 13 that is connected with balance weight body, and guide 2 is located in the pilot hole of guide part 13.Guide 2 has guaranteed that mobile counterweight 3 can only move up and down along it, has improved safety in the work amplitude changing process.Preferably, can in guide part 13, plain bearing be set according to the size of friction force between guide part 13 and the guide 2.
Please refer to Figure 13 and Figure 14, if the forced stroke of mobile counterweight 3 is less than the variation length of luffing rope 6 in amplitude changing process, preferably, luffing rope connecting portion comprises the counterweight pulley 12 that cooperates with luffing rope 6, and counterweight pulley 12 is connected pivotly with the balance weight body of mobile counterweight 3.At this moment, the end of luffing rope 6 can be fixed on the terminal fixed point of the luffing rope that is positioned at support 17 tops, and at this moment, the forced stroke of luffing rope 6 is twice expansion.Correspondingly, at this moment must suitably increase the weight of mobile counterweight 3.
As a second aspect of the present invention, a kind of tower crane is provided, comprising: body of the tower 14, equilibrium arm 15, crane arm 16, support 17, luffing arm-tie 18, luffing rope 6 and luffing mechanism.Wherein, this luffing mechanism is above-mentioned luffing mechanism; Equilibrium arm 15 is captiveed joint with body of the tower 14, and first end of crane arm 16 is connected pivotly with equilibrium arm 15; Second end of crane arm 16 is connected with the luffing rope connecting portion of luffing mechanism by luffing arm-tie 18, luffing rope 6 successively; The luffing motor 1 of luffing mechanism is installed in 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 luffing rope connecting portion is walked around in the end of luffing rope 6, captive joint with support 17.At this moment, the end of luffing rope 6 can be fixed on the terminal fixed point of the luffing rope that is positioned at support 17 tops, and at this moment, the forced stroke of luffing rope 6 is twice expansion.Correspondingly, at this moment must suitably increase the weight of mobile counterweight 3.
Preferably, tower crane also comprises luffing roller 19 and track adjusting wheel 20, and luffing roller 19 and track adjusting wheel 20 are installed in the top of support 17, after luffing rope 6 is walked around luffing roller 19 and track adjusting wheel 20 successively, is connected with luffing rope connecting portion.Preferably, luffing rope 6 is walked around from track adjusting wheel 20 belows, and is pressed on the luffing roller 19.In the front side of luffing roller 19 track adjusting wheel 20 is set, luffing rope 6 is walked around track adjusting wheel 20 to be contacted with luffing roller 19 again, can utilize track adjusting wheel 20 to guarantee crane arm 16 when big-elevation, luffing rope 6 contacts well with luffing roller 19, thereby has guaranteed the use safety of tower crane.
Preferably, luffing rope 6 is flat ropes.Please refer to Figure 15, an end of luffing 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 among the present invention is not subjected to the restriction of pulley groove, therefore, luffing rope 6 can be arranged to single rope steel rope group, also can use the higher flat-shaped material of pulling strengrth, to improve the tension safety of luffing rope, reduces the potential danger of luffing fracture of rope.Simultaneously, use the luffing rope 6 of big width to substitute steel rope, but cost-cutting, the running safety that improves luffing mechanism.
Preferably, tower crane also comprises fixed weight 21, and fixed weight 21 is installed on the equilibrium arm 15, and the total weight of fixed weight 21 and mobile counterweight 3 equals the required counterweight weight of tower crane.
As a third aspect of the present invention, a kind of luffing method of tower crane is provided, comprising: provide luffing motor 1, guide 2, mobile counterweight 3, counterweight to drive rope 4 and driving rolls 5; Driving rolls 5 is connected with 1 driving of luffing motor; Guide 2 vertically is arranged on the below of luffing motor 1; Mobile counterweight 3 is cooperated installation with guide 2, and make the mobile counterweight 3 can be along guide 2 up-and-down movements; Counterweight is driven rope 4 on driving rolls 5, and first end that counterweight drives rope 4 is connected with the upper end of mobile counterweight 3, restrict 4 second end of counterweight driving is connected with the lower end of mobile counterweight 3; The luffing 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 driving mobile counterweights 3 by counterweight and moves downward, and utilizes the deadweight of luffing motor and mobile counterweight 3 that luffing power is provided.
Preferably, the luffing method also comprises: the power sensor is provided, and the impact that is subjected to mobile counterweight 3 when the power sensor is during greater than predetermined value, with driving rolls 5 brakings.
Preferably, a part is separated as mobile counterweight 3 in the counterweight weight that tower crane is required.
The present invention is under the prerequisite that does not increase component weight and cost, by isolated mobile counterweight 3 from fixed weight, by its gravity effect, can significantly reduce the rating horsepower of luffing mechanism, reduced cost, simultaneously because dwindling of luffing mechanism volume can be arranged in it top of A cabinet frame, this has improved the equilibrium arm upper-part greatly and has arranged crowded phenomenon, makes the length of equilibrium arm significantly to shorten.
Since different with the principle of work of existing luffing mechanism, invent and can remove these parts of amplitude-changing drum of the prior art.Therefore, its luffing rope can not be subjected to the restriction of pulley groove, and can as required luffing rope 6 be replaced with wider width, pull resistance luffing rope preferably, thereby has increased the safety of luffing mechanism.In addition, owing to luffing rope 6 is connected with mobile counterweight 3, and the operating path of mobile counterweight 3 has been determined, therefore, has stopped because 6 fractures of luffing rope cause the potential danger of crane arm tenesmus.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (16)
1. the luffing mechanism of a tower crane comprises: luffing motor (1), guide (2), mobile counterweight (3), counterweight driving rope (4) and driving rolls (5); Described driving rolls (5) drives with described luffing motor (1) and is connected;
Described guide (2) vertically is arranged on the below of described luffing motor (1); Described mobile counterweight (3) cooperates with described guide (2) and can be along described guide (2) up-and-down movement;
Described counterweight drives rope (4) on described driving rolls (5), and first end that described counterweight drives rope (4) is connected with the upper end of described mobile counterweight (3), and second end that described counterweight drives rope (4) is connected with the lower end of described mobile counterweight (3);
Described mobile counterweight (3) comprises the luffing rope connecting portion of balance weight body and the luffing rope (6) that is used for being connected described tower crane.
2. luffing mechanism according to claim 1 is characterized in that, described luffing mechanism also comprises:
Abnormality detection unit (7), whether unusual for detection of the motion of described mobile counterweight (3);
Brake equipment (8) is installed in a side of described driving rolls (5), is used for described driving rolls (5) is braked;
Control unit, be connected with described brake equipment (8) with described abnormality detection unit (7), when described control unit detects described mobile counterweight (3) dyskinesia in described abnormality detection unit (7), control described brake equipment (8) described driving rolls (5) is braked.
3. luffing mechanism according to claim 2, it is characterized in that, described abnormality detection unit (7) is the power sensor, the impact that is subjected to described mobile counterweight (3) when described power sensor is during greater than predetermined value, and described control unit is controlled described brake equipment (8) described driving rolls (5) is braked.
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 installed on the 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 is characterized in that, described luffing mechanism also comprises the driving angle pulley (11) that is positioned at described guide (2) lower end one side, and described counterweight drives rope (4) and walks around described driving angle pulley (11).
6. luffing mechanism according to claim 1 is characterized in that, described luffing rope connecting portion comprises the counterweight pulley (12) that cooperates with described luffing 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 is characterized in that, described mobile counterweight (3) also comprises the guide part (13) that is connected with described balance weight body, and described guide (2) is located in the pilot hole of described guide part (13).
8. tower crane, comprise: body of the tower (14), equilibrium arm (15), crane arm (16), support (17), luffing arm-tie (18), luffing rope (6) and luffing mechanism, it is characterized in that described luffing mechanism is each described luffing mechanism in the claim 1 to 7;
Described equilibrium arm (15) is captiveed joint with described body of the tower (14), and 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 luffing rope connecting portion of described luffing mechanism by described luffing arm-tie (18), described luffing rope (6) successively; The luffing motor (1) of described luffing mechanism is installed in the top of described support (17).
9. tower crane according to claim 8 is characterized in that, after the counterweight pulley (12) of described luffing rope connecting portion is walked around in the end of described luffing rope (6), captives joint 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 installed in the top of described support (17), after described luffing rope (6) is walked around described luffing roller (19) and track adjusting wheel (20) successively, be connected with described luffing rope connecting portion.
11. tower crane according to claim 8 is characterized in that, described luffing rope (6) is flat rope.
12. tower crane according to claim 8 is characterized in that, the guide of described luffing mechanism (2) is positioned between two rear poles of described support (17).
13. tower crane according to claim 8, it is characterized in that, described tower crane also comprises fixed weight (21), described fixed weight (21) is installed on the described equilibrium arm (15), and the total weight of described fixed weight (21) and described mobile counterweight (3) equals the required counterweight weight of described tower crane.
14. the luffing method of a tower crane is characterized in that, comprising:
Provide luffing motor (1), guide (2), mobile counterweight (3), counterweight to drive rope (4) and driving rolls (5);
Described driving rolls (5) is connected with described luffing motor (1) driving;
Described guide (2) vertically is arranged on the below of described luffing motor (1);
Described mobile counterweight (3) is cooperated installation with described guide (2), and make the described mobile counterweight (3) can be along described guide (2) up-and-down movement;
Described counterweight is driven rope (4) on described driving rolls (5), and first end that described counterweight drives rope (4) is connected with the upper end of described mobile counterweight (3), and second end that described counterweight drives rope (4) is connected with the lower end of described mobile counterweight (3);
The luffing 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 described mobile counterweight (3) by described counterweight driving rope (4) and moves downward, and utilizes the deadweight of described luffing motor and described mobile counterweight (3) that luffing power is provided.
15. luffing method according to claim 14 is characterized in that, described luffing method also comprises:
The power sensor is provided, and the impact that is subjected to described mobile counterweight (3) when described power sensor is braked described driving rolls (5) during greater than predetermined value.
16. luffing method according to claim 14 is characterized in that, a part is separated as described mobile counterweight (3) in the counterweight weight that described tower crane is required.
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| CN107381370A (en) * | 2017-09-19 | 2017-11-24 | 安徽骏达起重机械有限公司 | Multiple scalable boom cranes |
| CN107399679A (en) * | 2017-09-22 | 2017-11-28 | 张家港沙工科技服务有限公司 | A kind of high stability tower crane |
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| CN103342295B (en) | 2015-04-08 |
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