CN104340885A - Crawling crane and boom frame system thereof - Google Patents
Crawling crane and boom frame system thereof Download PDFInfo
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- CN104340885A CN104340885A CN201410605351.5A CN201410605351A CN104340885A CN 104340885 A CN104340885 A CN 104340885A CN 201410605351 A CN201410605351 A CN 201410605351A CN 104340885 A CN104340885 A CN 104340885A
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- arm
- jib
- boom system
- tie portion
- lower arm
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/62—Constructional features or details
- B66C23/64—Jibs
- B66C23/68—Jibs foldable or otherwise adjustable in configuration
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/62—Constructional features or details
- B66C23/72—Counterweights or supports for balancing lifting couples
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/62—Constructional features or details
- B66C23/82—Luffing gear
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Jib Cranes (AREA)
Abstract
The invention discloses a crawling crane and a boom frame system thereof. The boom frame system comprises a boom frame and an amplitude variable boom, wherein the boom frame comprises a lower boom part hinged to a rotary table and an upper boom part connected with the lower boom part; the top of the lower boom part is provided with a connection lug plate; the boom frame system further comprises a tensioning piece and is at a transition state; one end of the tensioning piece is connected with the top of the amplitude variable boom and the other end of the tensioning piece is connected with the connection lug plate. According to the crawling crane applying the boom frame system, the safety in a transition process and the transition efficiency are higher.
Description
Technical field
The present invention relates to technical field of engineering machinery, particularly relate to a kind of crawler crane and boom system thereof.
Background technology
Please refer to Fig. 1, Fig. 1 is the structural representation of existing a kind of crawler crane.
At present, a kind of typical crawler crane comprises caterpillar chassis and turntable, and the bottom of luffing jib 1 ' is articulated with on described turntable, and the coxopodite arm of jib 2 ' is articulated with on described turntable equally.
Jib 2 ' is single oil cylinder, comprises coxopodite arm, arm head and is located at the some intermediate arms between coxopodite arm and arm head, passes through pinned connection between each joint arm.
Be provided with tension part 3 ' between the top of luffing jib 1 ' and the arm head of jib 2 ', this tension part 3 ' comprises variable amplitude rope 31 ' and the arm-tie 32 ' of serial connection, and wherein, variable amplitude rope 31 ' connects the top of luffing jib 1 ', and arm-tie 32 ' connects the arm head of jib 2 '.
Luffing jib 1 ' can rise under the driving of associated components, and variable amplitude rope 31 ' can change length under the effect of associated components, thus makes tension part 3 ' tensioning, and then jib 2 ' is rotated around its bottom with the luffing realizing jib 2 '.
In engineering reality, crawler crane, when completing lifting and entering the work of next lifting point, needs to carry out transition.
At present, the transition mode often taked has two kinds: one is in for jib the state of hoisting, and carries out the walking of full jib, as shown in fig. 1; Another kind of for making jib be in arm state, by each joint arm dismounting of jib, use transport vehicle to carry out transition transport, after arriving next lifting point, then assemble jib and carry out operation.
But what require hoisting weight, scope of work along with user improves constantly, and length, the cross section of the jib of crawler crane continue to increase.If implement the first transition mode, because jib is long, make the center of gravity of hoisting crane higher, easily topple during transition, affect safety; If implement the second transition mode, need transition after jib dismounting, then assemble, consuming time longer, be unfavorable for improving operating efficiency.
In view of this, how improving the safety of crawler crane in transition process and transition efficiency, is the current technical issues that need to address of those skilled in the art.
Summary of the invention
The object of this invention is to provide a kind of crawler crane and boom system thereof, safety when applying the crawler crane transition of this boom system and transition efficiency higher.
For solving the problems of the technologies described above, the invention provides a kind of boom system of crawler crane, comprising jib and luffing jib; Described jib comprises the lower arm part being articulated with turntable and the upper arm parts being connected to described lower arm part; The top of described lower arm part is provided with connection otic placode; Also comprise tension part, transition state, one end of described tension part connects the top of described luffing jib, and the other end connects described connection otic placode.
Design like this, crawler crane completes lifting when needing transition in lifting point, can first fall arm to level, remove suspension hook, remove the upper arm parts of jib and the connection of lower arm part, namely upper arm parts can be dismantled, and make one end of tension part connect the top of luffing jib, the other end is connected at the connection otic placode on lower arm part top, then regulates tension part, and what realize lower arm part plays arm; Like this, crawler crane is when transition is walked, and the jib being in the state of hoisting only has this part of lower arm part, and the upper arm parts of dismounting can use transport vehicle to carry out transition transport; Hoist compared with walking states with jib complete in background technology, in this programme, the transition mode of hoisting crane only with lower arm part walking significantly reduces the center of gravity of hoisting crane, and improve the stability against overturning of hoisting crane, the safety of transition is higher; Dismantle completely with each joint arm of jib in background technology, re-use transport vehicle carry out transition transport compare, in this programme, only need dismantle upper arm parts, not need each joint arm of jib to dismantle completely, thus in next lifting point of arrival, when re-assemblying jib, also only need this part of assembling upper arm parts, obviously, save the time, improve transition efficiency.
Alternatively, transition state, described upper arm parts can be rotated relative to described lower arm part, also comprises limiting component, and it is for limiting the relative position of described upper arm parts and described lower arm part.
Design like this, during transition, the relative lower arm part of upper arm parts can be made to turn to both fold, recycling limiting component restriction relative position between the two, like this, the center of gravity of hoisting crane is not only reduced during transition walking, also achieve the walking of full jib, that is, avoid the joint arm of the jib of transport vehicle transition transport dismounting, while the safety of guarantee crane transition, also reduce transition cost.
Alternatively, the top of described lower arm part and the bottom of described upper arm parts arrange the grafting otic placode cooperatively interacted, and are fitted with bearing pin in its lug plate holes.
Alternatively, described locating part comprises the leading sheave being arranged at described lower arm part, and is located at the elevator in described crawler crane turntable or described lower arm part; Stay cord on described elevator stretches out and after walking around described leading sheave, affixed with the top of described upper arm parts.
Alternatively, the top of described upper arm parts is also provided with support wheel, and described stay cord is walked around described support wheel and is fixed on described support wheel.
Alternatively, described leading sheave and described lower arm part removably connect.
Alternatively, described tension part comprises variable amplitude rope, the first arm-tie portion and the second arm-tie portion;
Mode of operation, described variable amplitude rope, described first arm-tie portion and described second arm-tie portion are connected in series successively; Described variable amplitude rope connects the top of described luffing jib, and described second arm-tie portion connects the top of described upper arm parts;
Transition state, described variable amplitude rope and described first arm-tie portion serial connection; Described variable amplitude rope connects the top of described luffing jib, and described first arm-tie portion connects described connection otic placode.
Alternatively, also equalizing bar is comprised; Transition state, described first arm-tie portion connects described connection otic placode by described equalizing bar.
Alternatively, described equalizing bar comprises the first crossbeam and second cross beam that be arranged in parallel, and both same sides are all connected by curb girder, and both two ends are provided with joint; The length of described first crossbeam is adaptive with the described spacing be connected between otic placode, the length of described second cross beam and the width adaptation in described first arm-tie portion.
The present invention also provides a kind of crawler crane, comprises turntable and the boom system being located at described turntable, and described boom system is aforementioned described boom system.
Because aforementioned boom system has aforementioned techniques effect, so the crawler crane comprising this boom system also has identical technique effect, repeat no more here.
Accompanying drawing explanation
Fig. 1 is the structural representation of existing a kind of crawler crane;
Fig. 2 is the transition structural representation of crawler crane first embodiment provided by the present invention;
Fig. 3 is the partial enlarged drawing at I position in Fig. 2;
Fig. 4 is the structural representation of equalizing bar in Fig. 2;
Fig. 5 is the structural representation of another angle of equalizing bar in Fig. 4;
Fig. 6 is the partial enlarged drawing at II position in Fig. 2;
Fig. 7 is the partial enlarged drawing at III position in Fig. 2;
The treating process of jib when Fig. 8-1 to Fig. 8-3 shows crawler crane first embodiment transition;
Fig. 8-4 is the partial enlarged drawing at IV position in Fig. 8-1;
The treating process of jib when Fig. 9-1 to Fig. 9-2 shows crawler crane second embodiment transition.
In Fig. 1:
Luffing jib 1 ', jib 2 ', tension part 3 ', variable amplitude rope 31 ', arm-tie 32 ';
In Fig. 2 to Fig. 9-2:
Luffing jib 10, jib 20, lower arm part 20a, upper arm parts 20b,
Connect otic placode 21, grafting otic placode 22, support wheel 23, leading sheave 24;
Tension part 30, variable amplitude rope 31, the first arm-tie portion 32, equalizing bar 33, joint 331, first crossbeam 332, second cross beam 333, curb girder 334;
Stay cord 40.
Detailed description of the invention
Core of the present invention is to provide a kind of crawler crane and boom system thereof, safety when applying the crawler crane transition of this boom system and transition efficiency higher.
In order to make those skilled in the art person understand the present invention program better, below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
For the ease of understanding and describing succinct, be hereafter described in conjunction with crawler crane and boom system thereof, beneficial effect no longer repeats to discuss.
Please refer to the transition structural representation that Fig. 2-3, Fig. 2 is crawler crane first embodiment provided by the present invention; Fig. 3 is the partial enlarged drawing at I position in Fig. 2.
In this embodiment, crawler crane provided by the present invention comprises caterpillar chassis, turntable and boom system; Described boom system comprises luffing jib 10 and jib 20; The bottom of luffing jib 10 is articulated with on described turntable, and the bottom of jib 20 is articulated with on described turntable equally.
In this embodiment, described jib 20 comprises lower arm part 20a and is connected to the upper arm parts 20b of lower arm part 20a.
Here, "up" and "down" defines based on the position relationship under crane operating status, just in order to state the clear and convenient of technical scheme, should not be understood as the absolute limit to protection domain.
Obviously, the bottom of lower arm part 20a is articulated with described turntable.The top of lower arm part 20a is provided with and connects otic placode 21, and the structure connecting otic placode 21 can be understood with reference to figure 3.
Jib 20, with in background technology, is single oil cylinder, comprises and coxopodite arm that described turntable is hinged, arm head and some intermediate arms of being located between described coxopodite arm and described arm head, can pass through pinned connection between each joint arm; Connection otic placode 21 is located at the one in some intermediate arms, and that is, lower arm part 20a comprises described coxopodite arm to each joint arm arranging the intermediate arm connecting otic placode 21, and all the other joint arms are in addition then upper arm parts 20b, can understand with reference to figure 2.
For convenience of describing, two intermediate arms be connected with upper arm parts 20b by lower arm part 20a are called lower intermediate arm and upper intermediate arm, that is, connect otic placode 21 and are located at lower intermediate arm.
So, be appreciated that lower intermediate arm is the top of lower arm part 20a, upper intermediate arm is the bottom of upper arm parts 20b.
In concrete scheme, the Width along lower intermediate arm is provided with two and connects otic placode 21, and these two connect the main chord that otic placode 21 is all located at lower intermediate arm, that is, and the distance between two connection otic placodes 21 and the width adaptation of lower intermediate arm.
Described boom system also comprises tension part 30.
Crawler crane is in running order, and one end of tension part 30 connects the top of luffing jib 10, and the other end connects the top of jib 20, i.e. the top of upper arm parts 20b.
Crawler crane is in transition state, and one end of tension part 30 connects the top of luffing jib 10, and the other end is connected at the connection otic placode 21 of lower intermediate arm.
In concrete scheme, tension part 30 comprises variable amplitude rope 31, first arm-tie portion 32 and the second arm-tie portion (not shown).Wherein, by the adjustment to variable amplitude rope 31, the luffing of jib 20 can be realized.
Mode of operation, variable amplitude rope 31, first arm-tie portion 32 and the second arm-tie portion are connected in series successively, and variable amplitude rope 31 connects the top of luffing jib 10, the top of the second arm-tie portion attached to upper arm portion 20b;
Transition state, variable amplitude rope 31 and the first arm-tie portion 32 are connected in series, and variable amplitude rope 31 connects the top of luffing jib 10, and the first arm-tie portion 32 is connected at the connection otic placode 21 of lower intermediate arm.
So, during transition, only need remove the connection in the first arm-tie portion 32 and the second arm-tie portion, and make the first arm-tie portion 32 and be connected otic placode 21 and connect, not only convenient but also save time.
Be appreciated that in the program, mode of operation and transition state use same group of tension part 30, can save structure and convenient operation, and certainly, in reality, if arrange tension part separately, it is also feasible for being specifically designed to transition.
Normal conditions, the arm head of jib 20 and the width on upper arm parts 20b top little compared with the width of intermediate arm part, so, the width on the second arm-tie portion and upper arm parts 20b top is adaptive, during work, second arm-tie portion is connected in series with the first arm-tie portion 32 again, so, the width in the first arm-tie portion 32 and the second arm-tie portion adaptation; During transition, connect with the connection otic placode 21 being located at lower intermediate arm for the ease of the first arm-tie portion 32, between the first arm-tie portion 32 and connection otic placode 21, be provided with equalizing bar 33 transition.
Please also refer to the structural representation that Fig. 4-5, Fig. 4 is equalizing bar in Fig. 2; Fig. 5 is the structural representation of another angle of equalizing bar in Fig. 4.
In concrete scheme, equalizing bar 33 comprises the first crossbeam 332 and second cross beam 333 that be arranged in parallel, and both same sides are all connected by curb girder 334, and both two ends are provided with joint 331; Wherein, the length of first crossbeam 332 is adaptive with the spacing be connected between otic placode 21, the length of second cross beam 333 and the width adaptation in the first arm-tie portion 32.
Obviously, during connection, the joint 331 at first crossbeam 332 two ends be connected otic placode 21 and connect, the joint 331 at second cross beam 333 two ends is connected with the first arm-tie portion 32.
Further, equalizing bar 33 is set to symmetrical structure, to make tension part 30 uniform force.
Particularly, crawler crane is in transition state, and upper arm parts 20b can rotate relative to lower arm part 20a; Also comprise limiting component, for limiting the relative position of upper arm parts 20b and lower arm part 20a.
Please also refer to Fig. 6-7; Fig. 6 is the partial enlarged drawing at II position in Fig. 2; Fig. 7 is the partial enlarged drawing at III position in Fig. 2.
In concrete scheme, lower intermediate arm and upper intermediate arm are provided with the grafting otic placode 22 cooperatively interacted, and are fitted with bearing pin in the lug plate holes of grafting otic placode 22.
During transition state, remove the connection bearing pin of lower intermediate arm and upper intermediate arm, retain the bearing pin in grafting otic placode 22, then upper arm parts 20b can rotate by the bearing pin in lug plate holes, thus upper arm parts 20b and lower arm part 20a is folded, state as shown in Figure 2.
In concrete scheme, limiting component comprises the leading sheave 24 being arranged at lower arm part 20a, and is located at the elevator on described turntable or described lower arm part 20a, and the stay cord 40 on described elevator stretches out and after walking around leading sheave 24, affixed with the top of upper arm parts 20b.By controlling the overhang of stay cord 40, the relative position of upper arm parts 20b and lower arm part 20a can be limited.
Wherein, leading sheave 24 and lower arm part 20a removably connect, and so as required leading sheave 24 can be installed on the appropriate location of lower arm part 20a.
The number of leading sheave 24 and the wrapping system of stay cord 40 all can be arranged as required.
Usually, the top of jib 20, namely the top of upper arm parts 20b is provided with support wheel 23, is used for mounting suspension hook.Here, support wheel 23 can be fixed on by after stay cord 40 solderless wrapped connection support wheel 23 further; In using, the multiplying power of stay cord 40 solderless wrapped connection leading sheave 24 and support wheel 23 can be set, make stay cord 40 stressed less, extend the service life of stay cord 40.
It is pointed out that described elevator can utilize existing elevator on described turntable or described lower arm part 20a, avoid increasing structure; Certainly, arrange separately elevator to be also fine.
The crawler crane of application said arm frame system, when transition, can be understood with reference to figure 8-1 to Fig. 8-4 treating process of jib 20.
After having lifted, when crawler crane needs transition, jib 20 is made to drop down onto horizontality, as shown in Fig. 8-1; Remove the connection in the first arm-tie portion 32 and the second arm-tie portion, by equalizing bar 33 by the first arm-tie portion 32 be connected otic placode 21 and connect, existing anchor fitting on jib 20 can be utilized to be fixed on jib 20 in the second arm-tie portion, to prevent from dropping in follow-up folding arm and transition process; Install leading sheave 24 at the correct position of lower arm part 20a, after making the stay cord on described elevator walk around the leading sheave 24 and top of upper arm parts 20b is fixed; Remove the connection of lower arm part 20a and upper arm parts 20b, namely remove the connection of lower intermediate arm and upper intermediate arm, with reference to figure 8-4, under dismounting, intermediate arm and upper intermediate arm are at the connection bearing pin at position A and B place, position, the bearing pin at grafting otic placode 22 place that reservation cooperatively interacts.
Then, variable amplitude rope 31 is regulated to realize an arm of jib 20, due to the pinned connection now only by grafting otic placode 22 place between lower arm part 20a and upper arm parts 20b, so reality is an arm of lower arm part 20a, in the process, upper arm parts 20b rotates relative to lower arm part 20a, the support wheel 23 on upper arm parts 20b top drags on ground, when support wheel 23 is liftoff, support wheel 23 is fixed on by after stay cord 40 solderless wrapped connection leading sheave 24, support wheel 23, after this while adjustment variable amplitude rope 31, regulate stay cord 40, this process can be understood with reference to figure 8-2.
Continue to regulate variable amplitude rope 31 to upper arm parts 20b perpendicular to ground, as upper arm parts 20b in Fig. 8-3 is in the state of position S1, now lower arm part 20a is in the state of hoisting, shrink stay cord 40, make it pull upper arm parts 20b to rotate, by position S1 to position S2, realize the folding of itself and lower arm part 20a, so far, be in can transition state, as shown in Figure 2 state for crawler crane.
When crawler crane arrives next lifting place, first release stay cord 40, make upper arm parts 20b to the position S1 perpendicular to ground, the now dismountable stay cord 40 being fixed on upper arm parts 20b top; Then pull out upper arm parts 20b, " outward " here refers to that, away from described turntable, available aid vehicle pulls upper arm parts 20b, certainly other modes also can be selected to pull upper arm parts 20b, meanwhile, regulate variable amplitude rope 31, lower arm part 20a is fallen arm, and the top to upper arm parts 20b is landed; Continue regulate variable amplitude rope 31 and pull upper arm parts 20b, lower arm part 20a and upper arm parts 20b is made to be in horizontality, now can recover the connection between lower arm part 20a and upper arm parts 20b, and the second arm-tie portion is connected in series with the first arm-tie portion 31, second arm-tie portion is connected with the top of jib 20, finally regulate variable amplitude rope 31 to realize an arm of jib 20, can mode of operation be entered.
As above, when crawler crane transition, the relative lower arm part 20a of upper arm parts 20b is folding fixing, be equivalent to only have lower arm part 20a to be in the state of hoisting, hoist compared with walking states with jib complete in background technology, the program obviously reduces the center of gravity of hoisting crane, improves the stability against overturning of hoisting crane, and the transition safety of hoisting crane is higher; With dismantle compared with jib transition transports in background technology completely, prepare before program transition and assembling after transition all reliably easy, consuming time few, transition efficiency is high; In addition, the program is also full jib walking states, without the need to using extra transport vehicle, avoids the increase of transition cost.
Please refer to Fig. 9-1 and Fig. 9-2, it illustrates the treating process of jib during crawler crane second embodiment transition.
Compared with aforementioned first embodiment, in second embodiment, only arrange on the top of lower arm part 20a and connect otic placode 21, that is, only arrange on lower intermediate arm and connect otic placode 21, lower intermediate arm and upper intermediate arm do not arrange the grafting otic placode cooperatively interacted, and upper arm parts 20b can not rotate relative to lower arm part 20a, certainly without the need to arranging corresponding limiting component yet.All the other structures are as tension part 30, similar with the first embodiment.
After having lifted, when crawler crane needs transition, make jib 20 drop down onto horizontality, remove the connection of lower arm part 20a and upper arm parts 20b, dismantle completely by upper arm parts 20b; Remove the connection in the first arm-tie portion 32 and the second arm-tie portion, by equalizing bar 33 by the first arm-tie portion 32 be connected otic placode 21 and connect, can with reference to figure 9-1.
Then, regulate variable amplitude rope 31 to realize an arm of jib 20, because now upper arm parts 20b removes, so reality is an arm of lower arm part 20a, lower arm part 20a is worked the state shown in Fig. 9-2 that rises to, and so far, crawler crane is in can transition state.
Obviously, in this kind of scheme, the transition of crawler crane is band portion jib (i.e. lower arm part 20a) walking states, the upper arm parts 20b removed carries out transition transport by transport vehicle, the second arm-tie portion of before removing also can transport in company with upper arm parts 20b together, certainly, the second arm-tie portion also can utilize existing anchor fitting to be fixed on lower arm part 20a with hoisting crane transition.
When crawler crane arrives next lifting point, regulate variable amplitude rope 31, lower arm part 20a is made to fall arm to horizontality, re-assembly lower arm part 20a and upper arm parts 20b and form jib 20, again the second arm-tie portion is connected in series with the first arm-tie portion 31, and the second arm-tie portion is connected with the top of jib 20, then regulate variable amplitude rope 31 to realize an arm of jib 20, can mode of operation be entered.
As above, when crawler crane transition, detachable upper arm parts 20b, during transition walking, only have lower arm part 20a to be in the state of hoisting, hoist compared with walking states with jib complete in background technology, the program obviously reduces the center of gravity of hoisting crane, improve the stability against overturning of hoisting crane, thus the safety of transition is higher; Dismantle jib completely with background technology, re-use transport vehicle carry out transition transport compare, the program only need remove upper arm parts 20b, without the need to being dismantled completely by jib, thus when ressembling after transition preparation and transition, assembled part is less, save the time, improve transition efficiency.
Above-mentionedly describe the structure of its boom system to arrange the hoisting crane that luffing jib realizes luffing range of cantilever support, in reality, described boom system is also suitable for for the hoisting crane realizing luffing range of cantilever support with other forms such as masts.
Above crawler crane provided by the present invention and boom system thereof are all described in detail.Apply specific case herein to set forth principle of the present invention and embodiment, the explanation of above embodiment just understands method of the present invention and core concept thereof for helping.It should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention, can also carry out some improvement and modification to the present invention, these improve and modify and also fall in the protection domain of the claims in the present invention.
Claims (10)
1. the boom system of crawler crane, comprises jib (20) and luffing jib (10); It is characterized in that, described jib (20) comprises the lower arm part (20a) being articulated with turntable and the upper arm parts (20b) being connected to described lower arm part (20a); The top of described lower arm part (20a) is provided with and connects otic placode (21); Also comprise tension part (30), transition state, one end of described tension part (30) connects the top of described luffing jib (10), and the other end connects described connection otic placode (21).
2. boom system according to claim 1, it is characterized in that, transition state, described upper arm parts (20b) can be rotated relative to described lower arm part (20a), also comprise limiting component, it is for limiting the relative position of described upper arm parts (20b) and described lower arm part (20a).
3. boom system according to claim 2, it is characterized in that, the top of described lower arm part (20a) and the bottom of described upper arm parts (20b) arrange the grafting otic placode (22) cooperatively interacted, and are fitted with bearing pin in its lug plate holes.
4. boom system according to claim 2, it is characterized in that, described limiting component comprises the leading sheave (24) being arranged at described lower arm part (20a), and is located at the elevator in described crawler crane turntable or described lower arm part (20a); Stay cord (40) on described elevator stretches out and after walking around described leading sheave (24), affixed with the top of described upper arm parts (20b).
5. boom system according to claim 4, it is characterized in that, the top of described upper arm parts (20b) is also provided with support wheel (23), and described stay cord (40) is walked around described support wheel (23) and is fixed on described support wheel (23).
6. boom system according to claim 4, is characterized in that, described leading sheave (24) and described lower arm part (20a) removably connect.
7. boom system according to claim 1, is characterized in that, described tension part (30) comprises variable amplitude rope (31), the first arm-tie portion (32) and the second arm-tie portion;
Mode of operation, described variable amplitude rope (31), described first arm-tie portion (32) and described second arm-tie portion are connected in series successively; Described variable amplitude rope (31) connects the top of described luffing jib (10), and described second arm-tie portion connects the top of described upper arm parts (20b);
Transition state, described variable amplitude rope (31) and described first arm-tie portion (32) serial connection; Described variable amplitude rope (31) connects the top of described luffing jib (10), and described first arm-tie portion (32) connects described connection otic placode (21).
8. boom system according to claim 7, is characterized in that, also comprises equalizing bar (33); Transition state, described first arm-tie portion (32) connects described connection otic placode (21) by described equalizing bar (33).
9. boom system according to claim 8, it is characterized in that, described equalizing bar (33) comprises the first crossbeam (332) and second cross beam (333) that be arranged in parallel, both same sides are all connected by curb girder (334), and both two ends are provided with joint (331);
The length of described first crossbeam (332) is adaptive with the described spacing be connected between otic placode (21), the length of described second cross beam (333) and the width adaptation in described first arm-tie portion (32).
10. crawler crane, comprise turntable and the boom system being located at described turntable, it is characterized in that, described boom system is the boom system described in any one of claim 1 to 9.
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| CN201410605351.5A CN104340885A (en) | 2014-10-30 | 2014-10-30 | Crawling crane and boom frame system thereof |
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| CN201410605351.5A CN104340885A (en) | 2014-10-30 | 2014-10-30 | Crawling crane and boom frame system thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105460812A (en) * | 2015-12-28 | 2016-04-06 | 中联重科股份有限公司 | Tower arm supporting rod and crane with same |
| WO2019243412A1 (en) * | 2018-06-20 | 2019-12-26 | Liebherr-Werk Ehingen Gmbh | Large crane with boom |
| CN111573532A (en) * | 2019-02-19 | 2020-08-25 | 利勃海尔爱茵根有限公司 | Folding suspended counterweight guiding device for crane |
| CN113501447A (en) * | 2021-07-08 | 2021-10-15 | 徐工集团工程机械股份有限公司建设机械分公司 | Crane and method for lifting main arm of crane |
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| CN105460812A (en) * | 2015-12-28 | 2016-04-06 | 中联重科股份有限公司 | Tower arm supporting rod and crane with same |
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| CN111573532A (en) * | 2019-02-19 | 2020-08-25 | 利勃海尔爱茵根有限公司 | Folding suspended counterweight guiding device for crane |
| CN113501447A (en) * | 2021-07-08 | 2021-10-15 | 徐工集团工程机械股份有限公司建设机械分公司 | Crane and method for lifting main arm of crane |
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