CN203865888U - Crawler crane - Google Patents
Crawler crane Download PDFInfo
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- CN203865888U CN203865888U CN201420244925.6U CN201420244925U CN203865888U CN 203865888 U CN203865888 U CN 203865888U CN 201420244925 U CN201420244925 U CN 201420244925U CN 203865888 U CN203865888 U CN 203865888U
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- shears
- pull bar
- bar
- crawler crane
- arm
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Abstract
The utility model provides a crawler crane, which has the advantages that by adopting a simpler structure, a propeller strut pulls up automatically, the operation is simple and the cost is low. The crawler crane comprises a chassis, and the propeller strut and a bottom joint arm, which are arranged on the chassis, wherein the propeller strut is connected with the bottom joint arm through an amplitude-variable steel wire rope guy cable; the crane further comprises at least one pull rod; the two ends of the pull rod are respectively hinged to the bottom joint arm and the chassis, so that the chassis can conveniently provide torque for the rising and falling of the propeller strut through the pull rod and the bottom joint arm; the bottom joint arm is connected with the chassis through the pull rod, so that the chassis provides active torque for the propeller strut through the pull rod, the bottom joint arm and the amplitude-variable steel wire rope guy cable in sequence to assist the propeller strut to pull up automatically; when the propeller strut is required to be put down, the chassis and the bottom joint arm provide trimming moment for the falling of the propeller strut, and the propeller strut is prevented from falling off caused by unbalanced torque. The crawler crane is simple in structure, lower in cost, and simple and easy in operation process, and improves the stability of the propeller strut during rising and falling.
Description
Technical field
The utility model relates to hoisting crane technical field, particularly relates to a kind of crawler crane.
Background technology
Please refer to Fig. 1 and Fig. 2, Fig. 1 is the construction profile schematic diagram of crawler crane in a kind of detailed description of the invention in prior art; Fig. 2 is the construction profile schematic diagram of Shears after folding in crawler crane shown in Fig. 1.
In prior art, crawler crane mainly by getting off 1 ', turntable 2 ', lifting amplitude-change swing type mechanism 3 ', counterweight 4 ', Shears 5 ', variable-amplitude steel wire rope drag-line 6 ' and jib 7 ' form.Due to the restriction of over-the-road transportation weight and size, for the transport of little tonnage caterpiller crane host machine part, conventionally need to Shears be fallen down to place in the time of transport, carry coxopodite arm simultaneously and carry out integrated transport, as shown in Figure 2.The volume and weight of considering Shears is larger, how to make the Shears operation of rising and falling more simply become those skilled in the art and need badly the technical matters of solution.
In current crawler crane, conventionally adopt the modes such as hydraulic ram, auxiliary counterweight and auxiliary lifting to realize rising and falling of Shears.
Please further refer to Fig. 3-5, Fig. 3 is the structural representation of realizing the first scheme that Shears rises and falls in prior art; Fig. 4 is the structural representation of realizing the first scheme that Shears rises and falls in prior art; Fig. 5 is the structural representation of realizing the third scheme that Shears rises and falls in prior art.
In the first scheme, on the turntable of hoisting crane, be provided with hydraulic ram 8 ', swing by the telescopic drive Shears of this hydraulic ram 8 ', to realize rising and falling of Shears, as shown in Figure 3.
In first scheme, the end of jib is provided with and lengthens jib 9 ' or other auxiliary counterweights, as shown in Figure 4.In the time that needs rise Shears, variable-amplitude steel wire rope drag-line 6 ' tightens up steel rope, and hoisting that lengthening jib 9 ' and coxopodite arm are Shears provides rotating torque, makes Shears be clockwise to the position that hoists; In the time of needs let-down Shears, variable-amplitude steel wire rope drag-line 6 ' loosens steel rope, and Shears falls downwards under himself Action of Gravity Field, so that superimposed being placed into of Shears got off on 1 '.
In the third scheme, in Shears, the pin jointed end of two connecting rods is provided with suspension hook 10 ', so that the top of slinging Shears by assisting vehicle is assisted and realized hoisting of Shears, as shown in Figure 5.
But all there is certain drawback in above-mentioned three kinds of schemes:
In the first scheme, on the one hand, need to carry out independent design and manufacture to the hydraulic ram 8 ' newly increasing, increase cost; On the other hand, need to drive hydraulic ram 8 ' by hydraulic pressure pump valve, thus more the complexity of hydraulic efficiency pressure system; Moreover, hydraulic ram 8 ' be set on turntable tie up the space of other parts, make the space layout on turntable more complicated, be not easy to maintenance.
In first scheme, because coxopodite arm is not enough to produce enough moment to drive Shears to hoist, therefore be provided with auxiliary counterweight devices such as lengthening jib, these auxiliary counterweight devices need to complete assembling by assisting vehicle, have increased cost; Moreover in the scheme of the auxiliary counterweight of employing, the arm of force providing due to variable-amplitude steel wire rope drag-line 6 ' is less, its drag-line power of bearing is relatively large, may exceed its carrying scope or need to reinforce the part-structure part of variable-amplitude steel wire rope drag-line 6 '; Certainly, in the situation that the arm of force is less, required auxiliary counterweight is also just larger, has further increased the difficulty of its assembly and disassembly.
In the third scheme, at every turn rising and falling of Shears all needs extra assisting vehicle to lift, and reduced the convenience of operation; Meanwhile, assisting vehicle has also proposed higher requirement to place, has increased use cost.
Therefore, how looking for another way, design a kind of crawler crane, adopt comparatively simple structure to realize rising and falling of Shears, is the current technical issues that need to address of those skilled in the art.
Utility model content
The purpose of this utility model is to provide a kind of crawler crane, adopt comparatively simple structure realized Shears from cocked, simple and convenient, reduced use cost.
For solving the problems of the technologies described above, the utility model provides a kind of crawler crane, comprise and get off and be arranged on Shears and the coxopodite arm on getting off, between described Shears and coxopodite arm, connect by variable-amplitude steel wire rope drag-line, also comprise at least one pull bar, the two ends of described pull bar respectively with described coxopodite arm and get off hinged so that described in to get off by described pull bar and coxopodite arm be described Shears rises and falls moment is provided.
Crawler crane of the present utility model is provided with pull bar, pull bar is connected coxopodite arm with getting off, coxopodite arm is connected with Shears by variable-amplitude steel wire rope drag-line, get off and provide initiatively moment by pull bar, coxopodite arm and variable-amplitude steel wire rope drag-line to Shears successively, realize the automatically cocked of Shears to assist; In the time of needs let-down Shears, loosen the steel rope of variable-amplitude steel wire rope drag-line, Shears falls after rise under the effect of self gravitation, now get off and coxopodite arm is Shears whereabouts provides balancing torque, prevent from causing Shears to fall because moment is unbalance, avoid hoisting crane to cause damage.The utility model is hinged pull bar at coxopodite arm and between getting off only, can utilize gets off provides moment for rising and falling of Shears, compared with available technology adopting hydraulic ram, auxiliary counterweight and the auxiliary mode lifting, of the present utility model simple in structure, change to hoisting crane is less, cost is lower, and operating process is simple; Meanwhile, the utility model has reasonably been utilized and has got off by pull bar, can realize Shears from cocked and let-down, and because the deadweight of getting off is larger, further improved the stability that Shears rises and falls.
Preferably, described pull bar is push-and-pull rod.
Pull bar can be set to push-and-pull rod, and its processing is comparatively simple, and cost is lower.What is more important, push-and-pull rod can be supported on the below of coxopodite arm, and in the process of hoisting crane transport, push-and-pull rod can provide support power for coxopodite arm, makes jib in transportation, keep stable; In the cocked process of Shears, push-and-pull rod can reliably be connected with getting off, and provides Shears cocked required active moment; When the active moment producing when the cocked certain angle of Shears, jib is greater than the moment that the gravity of Shears produces, push-and-pull rod can provide support moment for the whereabouts of jib, prevents from causing jib to fall because moment is unbalance.
Preferably, in two pin jointed ends of described pull bar, at least one is detachable, in the time that hoisting crane carries out lifting operation, can be by one end dismounting of pull bar, and by its be directly placed on get off or coxopodite arm on, improved the convenience using.
Preferably, described in, get off and there is the first hinged installation position of the described pull bar of some confessions and/or described coxopodite arm has the second hinged installation position of the described pull bar of some confessions.
Can some installation positions be set at coxopodite arm and the upper pull bar of getting off, be convenient to pull bar and select different installation positions to connect according to the demand of rising and falling of Shears, so that the moment of different sizes to be provided, meet the demand of rising and falling of different people cabinet frame.
Preferably, also comprise carrying roller, in the process of rising and falling at described Shears, described carrying roller is the steel rope of variable-amplitude steel wire rope drag-line described in support upwards.
Carrying roller is support steel rope upwards, because the two ends of steel rope are connected with coxopodite arm and Shears respectively, when carrying roller is upwards when support steel rope, steel rope is relatively away from the hinge of Shears and coxopodite arm, thereby increase the arm of force of relative two hinges of steel rope, at Shears and coxopodite arm in the time that hinge separately rotates, the moment that steel rope provides is improved.
Preferably, described Shears comprises hinged front bar and the rear bar in top with separately, and described carrying roller is arranged in described front bar, and upwards extends the vertical of described front bar, so as upwards described in support steel rope away from described front bar preset distance.
Preferably, described in get off and be provided with turntable, the bottom of described front bar and rear bar is all hinged on described turntable, described carrying roller is arranged on the below of described front bar.
In the time that carrying roller is arranged on the below of front bar, the rotation hinge during apart from the cocked and let-down of Shears more enters, and steel rope upwards can be held up to higher distance, to increase as much as possible the arm of force of steel rope.
Preferably, described carrying roller is arranged on 1/3 body of rod of described front bar in below.
Preferably, described coxopodite arm is hinged on described turntable, and the moment that described pull bar bears is calculated by following formula:
F5*L5＝(G1*L1*L3)/L2-G4*L4，
Wherein, the power that F5 bears for described pull bar;
G1 is the gravity of described Shears;
G4 is the gravity of described coxopodite arm;
L1 is the arm of force of described Shears with respect to the hinge-point of described front bar bottom;
L2 is that the steel rope of described variable-amplitude steel wire rope drag-line rear side is with respect to the arm of force of the hinge-point of described front bar bottom;
L3 is that the steel rope of described variable-amplitude steel wire rope drag-line front side is with respect to the arm of force of the hinge-point of described coxopodite arm;
L4 is the arm of force of described coxopodite arm with respect to its hinge-point;
L5 is the arm of force of pull bar with respect to the hinge-point of described coxopodite arm.
Brief description of the drawings
Fig. 1 is the construction profile schematic diagram of crawler crane in a kind of detailed description of the invention in prior art;
Fig. 2 is the construction profile schematic diagram of Shears after folding in crawler crane shown in Fig. 1;
Fig. 3 is the structural representation of realizing the first scheme that Shears rises and falls in prior art;
Fig. 4 is the structural representation of realizing the first scheme that Shears rises and falls in prior art;
Fig. 5 is the structural representation of realizing the third scheme that Shears rises and falls in prior art;
Fig. 6 is the structural representation of crawler crane that the utility model provides in a kind of detailed description of the invention;
Fig. 7 provides the local structure schematic diagram of crawler crane lifting operation for the utility model;
The force analysis schematic diagram that the Shears that Fig. 8 is crawler crane that the utility model provides rises and falls.
In Fig. 1-5:
1 ' get off, 2 ' turntable, 3 ' lifting amplitude-change swing type mechanism, 4 ' counterweight, 5 ' Shears 6 ' variable-amplitude steel wire rope drag-line, 7 ' jib, 8 ' hydraulic ram, 9 ' lengthen jib, 10 ' suspension hook
In Fig. 6-8:
1 get off, 11 first installation positions, 2 Shearves, 21 front bars, 22 rear bars, 3 coxopodite arms, 31 second installation positions, 4 variable-amplitude steel wire rope drag-lines, 5 pull bars, 6 carrying rollers, 7 turntables
Detailed description of the invention
Core of the present utility model is to provide a kind of crawler crane, adopt comparatively simple structure realized Shears from cocked, simple and convenient, reduced use cost.
In order to make those skilled in the art person understand better the utility model scheme, below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
Please refer to Fig. 6, Fig. 6 is the structural representation of crawler crane that the utility model provides in a kind of detailed description of the invention.
Crawler crane of the present utility model, comprise get off 1, Shears 2, coxopodite arm 3 and variable-amplitude steel wire rope drag-line 4, getting off 1 has crawler belt, for the transport of hoisting crane; Shears 2 and coxopodite arm 3 are all arranged on gets off on 1; Coxopodite arm 3 in crane arm with get off the 1 first segment arm being connected, the steel rope of variable-amplitude steel wire rope drag-line 4 is connected Shears 2 with coxopodite arm 3; Shears 2 can provide supplemental support power to jib, and the load on jib is passed to and gets off 1.
Crawler crane of the present utility model also comprises pull bar 5, and the two ends of pull bar 5, respectively with coxopodite arm 3 with get off 1 hingedly, 1 are connected with coxopodite arm 3 thereby will get off; In the time of the cocked Shears 2 of needs, the steel rope of variable-amplitude steel wire rope drag-line 4 tightens up, 1 be connected with getting off by pull bar 5 due to coxopodite arm 3, the deadweight of coxopodite arm 3, the get off tightening force of 1 pair of pull bar 5 and the tensile force of steel rope are the cocked initiatively moment that provides of Shears 2 jointly, Shears 2 is clockwise rotated along the direction shown in arrow in Fig. 6, arrive cocked position, i.e. position shown in dotted portion in Fig. 6; In the time of needs let-down Shears 2, loosen the steel rope of variable-amplitude steel wire rope drag-line 4, the deadweight of coxopodite arm 3, the get off tightening force of 1 pair of pull bar 5 and the tensile force of steel rope provide balancing torque for the let-down of Shears 2, so that the moment that rotates counterclockwise producing with the deadweight of Shears 2 balances each other, make Shears 2 let-down gradually, as shown in solid line part in Fig. 6.
Because the deadweight of Shears 2 is larger, the deadweight of the tensile force of steel rope and coxopodite arm 3 is not enough to produce the moment that enough active moment is cocked by it or its gravity of balance produces.The utility model arranges pull bar 5 and is connected to coxopodite arm 3 and gets off between 1, in the time of variable-amplitude steel wire rope drag-line 4 tensioning steel rope, pull bar 5 be subject to getting off 1 constraint pulls coxopodite arm 3 downwards, that is to say, getting off 1 provides its cocked required active moment by pull bar 5 to Shears 2.In like manner, in the process of Shears 2 let-downs, getting off 1 provides balancing torque by pull bar 5, coxopodite arm 3 for the let-down of Shears 2, to stablize the state of Shears 2, realizes the steady falling of Shears 2.
Further, pull bar 5 can be set to push-and-pull rod.Push-and-pull rod can adopt the processes such as casting to form, and it is simple in structure, and cost is lower; In the process of crawler crane transport, the pull bar 5 of rigidity is connected to coxopodite arm 3 and gets off between 1, can provide supplemental support power to coxopodite arm 3, makes jib in transportation, keep stable; In the cocked process of Shears 2, the pull bar 5 of rigidity can be strained coxopodite arm 3 better, is the cocked active moment that continuous and effective is provided of Shears 2; When the active moment producing when the cocked certain angle of Shears 2, coxopodite arm 3 is greater than the moment that the gravity of Shears 2 produces, coxopodite arm 3 can produce the movement tendency dropping down, now, the pull bar 5 of rigidity can supplemental support coxopodite arm 3, prevents from causing because moment is unbalance that jib falls; In the process of Shears 2 let-downs, the pull bar 5 of rigidity can provide failure-free tightening force for coxopodite arm 3, prevents that moment that the gravity of Shears 2 produces is excessive and damages coxopodite arm 3, realizes the stable falling of Shears 2.
Described jib comprises coxopodite arm 3 and is nested in the telescopic boom in coxopodite arm 3 herein, but owing to only carrying coxopodite arm 3 in crawler crane walking process, therefore realizing in the process that Shears 2 rises and falls, described jib is coxopodite arm 3.
Please further refer to Fig. 7, Fig. 7 provides the local structure schematic diagram of crawler crane lifting operation for the utility model.
In two pin jointed ends of pull bar 5, have at least one can be set to removably connect, for example, pull bar 5 can be for removably connecting with 1 the pin jointed end of getting off, in the time that hoisting crane carries out lifting operation, can remove pull bar 5 and get off being connected between 1, pull bar 5 is hung on coxopodite arm 3, as shown in Figure 7.Or, can pull bar 5 be set to removably connect with the pin jointed end of coxopodite arm 3, complete at Shears 2 and rise and fall, when hoisting crane normal operation, remove the hinged of pull bar 5 and coxopodite arm 3, pull bar 5 is hung and got off on 1.Two of pull bar 5 pin jointed end all can also be set to removably connect, in the time not needing Shears 2 to rise and fall, pull bar 5 directly be dismantled from hoisting crane, while needs, install again.
In the time that pull bar 5 adopts push-and-pull rod, can be set to removably connect by its pin jointed end, remove to according to demand pull bar 5 is dismantled get off 1 and coxopodite arm 3 between be connected, avoid affecting the normal operation of hoisting crane because pull bar 5 limits coxopodite arm 3.On the other hand, dismounting pull bar 5 as required, to adapt to the several work demand of hoisting crane.
In addition, the utility model can arrange some pull bars 5, can be one, two or more, 1 be connected with the reliable of coxopodite arm 3 to realize getting off; That is to say, herein described some be that exponential quantity is uncertain, not refer in particular to quantity more.
It will be understood by those skilled in the art that in the time that two or more pull bars 5 are set, get off 1 and coxopodite arm 3 between be connected more reliably, and point of connection can disperse relatively, avoids single-point to connect causing stress to concentrate.
Can also arrange on 1 somely for the first hinged installation positions 11 of pull bar 5 getting off, pull bar 5 can be selected to be connected with certain first installation position 11 wherein, to change power that pull bar 5 born and the arm of force of generation, thereby changes the moment that pull bar 5 provides for Shears 2.
In like manner, coxopodite arm 3 can arrange some for the second hinged installation position 31 of pull bar 5, so that pull bar 5 is selected to be connected with certain second installation position 31 wherein.
In the time that pull bar 5 is selected the first different installation positions 11 and the second installation position 31, the installation site of pull bar 5 changes, and its moment that Shears 2 is provided also changes accordingly; That is to say, can convert the connection location of pull bar 5, to adapt to the demand of rising and falling of different people cabinet frame 2.
The number of described the first installation position 11 and the second installation position 31 can not wait, and pull bar 5 can be according to the position relative set of the first installation position 11 and the second installation position 31, and the first installation position 11 and the second installation position 31 can combination in any, to realize the installation of pull bar 5; Certainly, the number of the first installation position 11 and the second installation position 31 can equate, both can correspondingly arrange, be the second installation position 31 that certain first installation position 11 all exists a setting corresponding to it, and a corresponding set pull bar 5 can be arranged between this first installation position 11 and the second installation position 31; Or the number of the first installation position 11 and the second installation position 31 can equate with the number of pull bar 5, all there is the installation position of setting corresponding to it in each pull bar 5.
It should be noted that, the first and second described sequencers such as grade, only in order to distinguish different structures, do not represent certain specific order herein.
On the basis of the above, the utility model can also comprise carrying roller 6, and in the process of rising and falling at Shears 2, carrying roller 6 is the steel rope of support variable-amplitude steel wire rope drag-line 4 upwards.Because Shears 2 and coxopodite arm 3 all 1 are connected with getting off with its bottom, and the steel rope of variable-amplitude steel wire rope drag-line 4 is connected Shears 2 with the top of coxopodite arm 3, old friend's cabinet frame 2 and 1 hinge-point, coxopodite arm 3 and 1 all belows in steel rope of hinge-point of getting off of getting off; In the process of rising and falling at Shears 2, carrying roller 6 upwards support steel rope makes in fact steel rope away from each hinge-point, and then increase the tightening force of steel rope with respect to the arm of force of each hinge-point, in the case of the tightening force of steel rope is certain, can, for the cocked and let-down of Shears 2 provides larger moment, need the deadweight of coxopodite arm 3 and 1 moment providing is provided thereby reduced.
Particularly, Shears 2 can comprise front bar 21 and rear bar 22, front bar 21 and rear bar 22 are hinged with top separately, carrying roller 6 can be arranged in front bar 21, and upwards extend the vertical of front bar 21, thereby rise and fall in process at Shears 2, upwards support steel rope, makes steel rope away from front bar 21 preset distances.
The vertical direction that refers to the body of rod that is substantially perpendicular to front bar 21 of described front bar 21, roughly perpendicular with front bar 21; Described carrying roller 6 refers to carrying roller 6 perpendicular to front bar 21 and extends upward along vertical upwards extension of front bar 21, thereby by upwards support of steel rope, make steel rope away from front bar 21 preset distances, described preset distance refers to the height of steel rope higher than front bar 21, and described height refers to the distance on front bar 21 is vertical.
Described front and back, the upper inferior noun of locality are taking crawler crane normal operating condition as reference herein, described fore-and-aft direction refers to the direction that is parallel to crawler crane direction of travel, described direction of travel direction pointed is front, after with the opposing direction of direction of travel being; Described above-below direction is vertical direction, and the direction of directed towards ground is upper away from the direction on ground under being.
Described front bar 21 refers to the connecting rod near front, and rear bar 22 refers to the connecting rod that is hinged on front bar 21 rear sides, and front bar 21 and rear bar 22 are hinged to one with its top, jointly form Shears 2.In the time of Shears 2 let-down, front bar 21 and rear bar 22 all rotate backward, the top of front bar 21 now in rear bar 22, as shown in Figure 6; As mentioned above, because the hinge-point of Shears 2 is in below, now carrying roller 6 can be arranged in front bar 21, thereby makes carrying roller 6 support steel rope effectively, make steel rope as much as possible away from the hinge-point of Shears 2, and then increase the arm of force of steel rope.
Further, get off on 1 turntable 7 can be set, then the bottom of front bar 21 and rear bar 22 is all hinged on turntable 7, and carrying roller 6 is arranged on to the below of front bar 21.Coxopodite arm 3 also can be hinged on turntable 7, so that according to the demand rotating table 7 of lifting operation, changes the work orientation of Shears 2 and coxopodite arm 3.
The below of described front bar 21 refers to the direction with turntable 7 hinge-points near front bar 21.In the time that carrying roller 6 is arranged on the below of front bar 21, carrying roller 6 is the hinge-point with turntable near front bar 21 more, in the case of the length of carrying roller 6 is certain, and can be by steel rope as much as possible away from the hinge-point of front bar 21, effectively to increase the arm of force of steel rope.
Further, carrying roller 6 can be arranged on 1/3 body of rod of front bar 21 in below; The length direction of front bar 21 can be divided into 3 parts from top to bottom, carrying roller 6 is arranged in 1/3 region in below, carrying roller 6 and the distance of front bar 21 below hinge-points are limited within the specific limits, thereby control the arm of force length of steel rope with respect to front bar 21 below hinge-points.
Incorporated by reference to Fig. 8, the force analysis schematic diagram that the Shears that Fig. 8 is crawler crane that the utility model provides rises and falls.
Definition front bar 21 is O with the hinge-point of turntable 7, the hinge-point position P of coxopodite arm 3 and turntable 7, and the moment that pull bar 5 bears can calculate by following formula:
F5*L5＝(G1*L1*L3)/L2-G4*L4，
Wherein, the power that F5 bears for described pull bar 5;
G1 is the gravity of described Shears 2;
G4 is the gravity of described coxopodite arm 3;
L1 is the arm of force of described Shears 2 with respect to hinge-point O;
L2 is that the steel rope of described variable-amplitude steel wire rope drag-line 4 rear sides is with respect to the arm of force of hinge-point O;
L3 is that the steel rope of described variable-amplitude steel wire rope drag-line 4 front sides is with respect to the arm of force of hinge-point P;
L4 is the arm of force of described coxopodite arm 3 with respect to its hinge-point P;
L5 is the arm of force of pull bar 5 with respect to the hinge-point P of described coxopodite arm 3.
Particularly, Shears 2 can be reduced to around hinge-point O and P and rotate from cocked process, a balanced system of two each existence of hinge-point.
For hinge-point O, the gravity G1 of Shears 2 produces the rotating torque that relative hinge-point O rotates counterclockwise, the tensile force F2 that variable-amplitude steel wire rope drag-line 4 provides in the steel rope of rear side produces the rotating torque that relative hinge-point O clockwise rotates, these two torque keeping balances, i.e. G1*L1=F2*L2;
For hinge-point P, the gravity G4 of coxopodite arm 3 produces the rotating torque clockwise rotating around hinge-point P, the tensile force f 5 of pull bar 5 produces the rotating torque clockwise rotating around hinge-point P, the tensile force F3 of the steel rope of variable-amplitude steel wire rope drag-line 4 in front side produces the rotating torque rotating counterclockwise around hinge-point P, these three torque keeping balances, i.e. G4*L4+F5*L5=F3*L3;
Known according to the flexible body characteristic of steel rope, F2=F3, therefore can draw G1*L1/L2=(G4*L4+F5*L5)/L3, further arrangement can draw the moment that pull bar 5 bears, be F5*L5=(G1*L1*L3)/L2-G4*L4, to according to this structure and the intensity etc. of pull bar 5 are designed.
It will be understood by those skilled in the art that on the process nature of Shears 2 let-downs be also the process of a moment balance, identical from cocked process with above-mentioned Shears 2.
In addition, the arm of force L2 that major effect F2 is set of carrying roller 6, thus can arrange carrying roller 6 and dependency structure part thereof according to above-mentioned formula G1*L1=F2*L2, to realize the balance of hinge-point O.
Also it should be noted that, in the process of rising and falling at Shears 2, arm of force L1, L2 and L3 all can change, therefore in concrete computation process, can calculate at Shears 2 different arm of force values during in different state, thereby draw pull bar 5 required moment of bearing under different conditions, and then comprehensive various state arranges to pull bar 5.
The utility model provides the structure of other parts in crawler crane to please refer to prior art, repeats no more herein.
Above crawler crane provided by the utility model is described in detail.Applied specific case herein principle of the present utility model and embodiment are set forth, the explanation of above embodiment is just for helping to understand core concept of the present utility model.Should be understood that; for those skilled in the art; do not departing under the prerequisite of the utility model principle, can also carry out some improvement and modification to the utility model, these improvement and modification also fall in the protection domain of the utility model claim.
Claims (8)
1. a crawler crane, comprise and get off (1) and be arranged on Shears (2) and the coxopodite arm (3) of getting off on (1), between described Shears (2) and coxopodite arm (3), connect by variable-amplitude steel wire rope drag-line (4), it is characterized in that, also comprise at least one pull bar (5), the two ends of described pull bar (5) are hinged with described coxopodite arm (3) and get off (1) respectively, so as described in get off (1) provide moment by described pull bar (5) and coxopodite arm (3) for rising and falling of described Shears (2).
2. crawler crane as claimed in claim 1, is characterized in that, described pull bar (5) is push-and-pull rod.
3. crawler crane as claimed in claim 2, is characterized in that, in two pin jointed ends of described pull bar (5), at least one is detachable.
4. crawler crane as claimed in claim 1, is characterized in that, described in get off (1) have hinged the first installation position (11) of the described pull bar of some confessions (5) and/or
Described coxopodite arm (3) has hinged the second installation position (31) of the described pull bar of some confessions (5).
5. the crawler crane as described in claim 1-4 any one, it is characterized in that, also comprise carrying roller (6), in the process of rising and falling at described Shears (2), described carrying roller (6) is the steel rope of variable-amplitude steel wire rope drag-line (4) described in support upwards.
6. crawler crane as claimed in claim 5, it is characterized in that, described Shears (2) comprises hinged front bar (21) and the rear bar (22) in top with separately, described carrying roller (6) is arranged in described front bar (21), and upwards extend the vertical of described front bar (21) so that upwards described in support steel rope away from described front bar (21) preset distance.
7. crawler crane as claimed in claim 6, it is characterized in that, described getting off (1) is provided with turntable (7), it is upper that the bottom of described front bar (21) and rear bar (22) is all hinged on described turntable (7), and described carrying roller (6) is arranged on the below of described front bar (21).
8. crawler crane as claimed in claim 7, is characterized in that, described carrying roller (6) is arranged on 1/3 body of rod of described front bar (21) in below.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420244925.6U CN203865888U (en) | 2014-05-13 | 2014-05-13 | Crawler crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420244925.6U CN203865888U (en) | 2014-05-13 | 2014-05-13 | Crawler crane |
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| CN203865888U true CN203865888U (en) | 2014-10-08 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103935907A (en) * | 2014-05-13 | 2014-07-23 | 徐工集团工程机械股份有限公司 | Crawling crane |
| CN104495654A (en) * | 2014-12-16 | 2015-04-08 | 太原重工股份有限公司 | Crane and integral type rotary platform thereof |
| CN105460807A (en) * | 2015-11-24 | 2016-04-06 | 徐州重型机械有限公司 | All-terrain crane |
-
2014
- 2014-05-13 CN CN201420244925.6U patent/CN203865888U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103935907A (en) * | 2014-05-13 | 2014-07-23 | 徐工集团工程机械股份有限公司 | Crawling crane |
| CN103935907B (en) * | 2014-05-13 | 2016-08-24 | 徐工集团工程机械股份有限公司 | A kind of crawler crane |
| CN104495654A (en) * | 2014-12-16 | 2015-04-08 | 太原重工股份有限公司 | Crane and integral type rotary platform thereof |
| CN105460807A (en) * | 2015-11-24 | 2016-04-06 | 徐州重型机械有限公司 | All-terrain crane |
| CN105460807B (en) * | 2015-11-24 | 2018-10-09 | 徐州重型机械有限公司 | The full Terrain Cranes |
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| C25 | Abandonment of patent right or utility model to avoid double patenting |