CN203021223U - Variable-amplitude pulley block structure for crane and crane with mechanism - Google Patents
Variable-amplitude pulley block structure for crane and crane with mechanism Download PDFInfo
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- CN203021223U CN203021223U CN 201220657941 CN201220657941U CN203021223U CN 203021223 U CN203021223 U CN 203021223U CN 201220657941 CN201220657941 CN 201220657941 CN 201220657941 U CN201220657941 U CN 201220657941U CN 203021223 U CN203021223 U CN 203021223U
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Abstract
The utility model discloses a variable-amplitude pulley block structure for a crane and the crane with a mechanism. The variable-amplitude pulley block structure comprises a variable-amplitude pulley block, a first supporting arm and a second supporting arm, wherein a first connecting point of the first supporting arm is hinged to a turntable of the crane through a pin shaft manner, and a second connecting point of the first supporting arm is connected with the variable-amplitude pulley block; a first connecting point of the second supporting arm is connected to a turntable of the crane through a disjointed manner, and a second connecting point of the second supporting arm is connected with the variable-amplitude pulley block; and the variable-amplitude pulley block is not completely welded on the turntable, and can be switched between a fixed state relative to the turntable and a rotating movable state relative to the turntable. The variable-amplitude pulley block can hoist the weight (such as the turntable balance weight) under the movable state, so that the turntable balance weight is arranged or disassembled. Therefore, balance weight installation is realized by adopying a simple structure at low cost.
Description
Technical field
The utility model relates to the hoisting crane technical field, particularly relate to a kind of for hoisting crane the luffing pulley block structure and with the hoisting crane of this mechanism.
Background technology
Referring to Fig. 1, in the prior art, following form is mainly taked in the dismounting of turntable counterweight and installation: adopting two of the left and right oil cylinder 3(Fig. 1 that is arranged on turntable 2 is front elevation, only shows an oil cylinder) described counterweight 4 liftings are put in place.For example, the cylinder body of oil cylinder 3 is fixed on turntable 2, connects by chain (or arm-tie) between the piston rod of counterweight 4 and oil cylinder 3, and when cylinder piston rod protruded upward, counterweight was along with the piston rod upward movement, until arrive the installation site.Then, connect described turntable and counterweight with bearing pin, realize the installation of counterweight.With the reverse order operation, can realize the dismounting of counterweight.
When carrying out the dismounting of counterweight 4, especially during the integral disassembly, assembly of counterweight, that is that all right is ripe due to the hydraulic control technology, is difficult to realize the synchronization action of two oil cylinders in left and right, and this can cause counterweight that beat occurs when dismounting, has larger potential safety hazard.And, adopt oil cylinder cause manufacturing cost and use cost higher.
In addition, described oil cylinder only is used for the installation of counterweight, and service efficiency is not high.Thereby, wish a kind of new hoisting crane, adopt new device to come installation and removal turntable counterweight in described hoisting crane.
The utility model content
The purpose of this utility model is, utilizes existing structure in the tackling system of hoisting crane to realize the installation and removal of rotating platform of crane counterweight.Thereby, avoid the use of oil cylinder, reduce manufacturing cost and the use cost of hoisting crane.
For this reason, utility model people of the present utility model provides a kind of luffing pulley block structure for hoisting crane after the structure of scrutinizing existing hoisting crane and structure.Comprise according to luffing pulley block structure of the present utility model: the luffing assembly pulley; The first hold-down arm, the first point of connection of described the first hold-down arm is used for being hinged to by the bearing pin mode turntable of described hoisting crane, and the second point of connection of described the first hold-down arm is connected with described luffing assembly pulley; The second hold-down arm, the first point of connection of described the second hold-down arm releaseably is connected to the turntable of described hoisting crane, and the second point of connection of described the second hold-down arm is connected with described luffing assembly pulley.
In the prior art, luffing pulley block structure integral solder is on turntable, for increasing the power output of luffing elevator.In structure of the present utility model, the luffing pulley block structure be not integral solder on turntable, but the luffing pulley block structure can be arranged to two states: the first state is the state fixing with respect to turntable; The second state is can be with respect to the state of turntable rotation.Under the first state, the effect of luffing pulley block structure is with identical in the prior art.Under the second state, the first point of connection disengagement of the second hold-down arm and being connected of rotating platform of crane, thus the luffing pulley block structure can rotate with respect to turntable around the first point of connection of the first hold-down arm.And then, can under the second state, described luffing assembly pulley be used for slinging weight, the turntable counterweight of for example slinging, thereby installation or removal turntable counterweight.
Relatively existing employing oil cylinder carries out the scheme from dismounting, and the utility model has solved the beat problem that counterweight causes due to two oil cylinder stretching speed differences in the jacking process, improved the safety of counterweight from dismounting; The utility model has been cancelled jacking weight balancing oil cylinder and fluid control valve, has reduced and has realized that counterweight is from the cost of dismounting.
Preferably, the second point of connection of described the first hold-down arm is connected with the center shaft of described luffing assembly pulley, and the second point of connection of described the second hold-down arm is connected with the center shaft of described luffing assembly pulley.
Preferably, described the first hold-down arm and described the second hold-down arm are one-body molded and form the bracing frame of described luffing assembly pulley, and wherein, the second point of connection of described the first hold-down arm overlaps with the second point of connection of described the second hold-down arm.
Preferably, described luffing pulley block structure further comprises main transformer width elevator and main transformer width rope, when throwing off, described main transformer width elevator can drive described luffing assembly pulley by described main transformer width rope and rotate around the first point of connection of described the first hold-down arm being connected between the first point of connection of described the second hold-down arm and described turntable.
The utility model also provides a kind of hoisting crane, and described hoisting crane comprises luffing pulley block structure as above.
Thereby the luffing pulley block structure that makes hoisting crane of the present utility model can be used for substituting oil cylinder of the prior art, thereby reduces costs.
Preferably, described hoisting crane further comprises: mast, and the lower hinge of described mast is hinged on described turntable, and the place is provided with the fixed pulley group on top; And the mast registration device, be used for described mast is located with respect to described turntable, wherein, described main transformer width rope is connected to described luffing assembly pulley from described main transformer width elevator through described fixed pulley group.
Preferably, described mast registration device comprises: principal arm is prevented hypsokinesis, and lower hinge and the described turntable of the anti-hypsokinesis of described principal arm are hinged; And pin shaft connecting apparatus, be used for releaseably connecting the anti-hypsokinesis of described mast and described principal arm, thereby make described principal arm prevent that hypsokinesis, described turntable and described mast connect into triangular structure.
Preferably, described hoisting crane further comprises: the principal arm coxopodite, and its lower hinge and described turntable are hinged; Principal arm is prevented hypsokinesis, lower hinge and the described turntable of the anti-hypsokinesis of described principal arm are hinged, upper hinge and the described principal arm coxopodite of the anti-hypsokinesis of described principal arm are hinged, thereby make described principal arm prevent that hypsokinesis, described turntable and described principal arm coxopodite connect into triangular structure, wherein, described mast registration device is mast stay cord or mast pull bar, and an end of described mast stay cord or mast pull bar is connected to described mast, and the other end is connected to described principal arm coxopodite.
In another preferred embodiment, described hoisting crane further comprises: the principal arm coxopodite, and its lower hinge and described turntable are hinged; Principal arm coxopodite stay cord, one end of described principal arm coxopodite stay cord is connected with described turntable, the other end is connected to described principal arm coxopodite, thereby limit the relative position of described principal arm coxopodite and described turntable, wherein, described mast registration device is mast stay cord or mast pull bar, and an end of described mast stay cord or mast pull bar is connected to described mast, and the other end is connected to described principal arm coxopodite.
Preferably, described hoisting crane is crawler crane.
Description of drawings
Fig. 1 is with the schematic diagram of the hoisting crane of jack cylinder in prior art.
Fig. 2 is the schematic diagram according to the hoisting crane of the cancellation jack cylinder of the utility model one embodiment, and in shown position, the luffing pulley block structure is in the state fixing with respect to turntable.
Fig. 3 is another schematic diagram of hoisting crane shown in Figure 2, and in shown position, the luffing pulley block structure is in can be with respect to the state of turntable around a hinge-point rotation.
Fig. 4 is the enlarged view of A section in Fig. 3.
Fig. 5 is the schematic diagram according to the hoisting crane of the cancellation jack cylinder of another embodiment of the utility model, adopts in the drawings stay cord that the principal arm coxopodite is positioned.
Fig. 6 is the schematic diagram with the luffing pulley block structure of two hold-down arms of the utility model the first embodiment.
Fig. 7 is the decomposing schematic representation of luffing pulley block structure shown in Figure 6.
Fig. 8 is the schematic diagram with the luffing assembly pulley of bracing frame of the utility model the second embodiment.
Reference numeral:
| 1 | Mast | 12 | Bearing pin |
| 2 | |
13 | |
| 3 | |
14 | Outer tube |
| 4 | Counterweight | 15 | |
| 4a | The counterweight component | 16 | |
| 5 | Main |
17 | Bearing pin |
| 6 | Main transformer |
18 | Stay |
| 7 | The luffing assembly pulley | 19 | Stay |
| 8 | Stay |
70 | Bracing frame |
| 9 | Principal arm is prevented |
71 | The first hold-down |
| 10 | The |
72 | The second hold-down arm |
| 11 | Hoist rope |
The specific embodiment
For purpose, technical scheme and advantage that the utility model is implemented is clearer, below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is further described in more detail.In the accompanying drawings, same or similar label represents same or similar element or the element with identical or similar functions from start to finish.Described embodiment is the utility model part embodiment, rather than whole embodiment.Be exemplary below by the embodiment that is described with reference to the drawings, be intended to for explanation the utility model, and can not be interpreted as restriction of the present utility model.Based on the embodiment in the utility model; those of ordinary skills are not making the every other embodiment that obtains under the creative work prerequisite, and the scope that all belongs to the utility model protection is elaborated to embodiment of the present utility model below in conjunction with accompanying drawing.
in description of the present utility model, it will be appreciated that, term " " center ", " vertically ", " laterally ", " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end " " interior ", orientation or the position relationship of indications such as " outward " are based on orientation shown in the drawings or position relationship, only the utility model and simplified characterization for convenience of description, rather than device or the element of indication or hint indication must have specific orientation, with specific orientation structure and operation, therefore can not be interpreted as the restriction to the utility model protection domain.
Fig. 2 is the schematic diagram according to the hoisting crane of the cancellation jack cylinder of the utility model one embodiment, and in shown position, the luffing pulley block structure is in the state fixing with respect to turntable.Fig. 3 is another schematic diagram of hoisting crane shown in Figure 2, and in shown position, the luffing pulley block structure is in can be with respect to the state of turntable around a hinge-point rotation.
In the prior art, luffing pulley block structure integral solder is on turntable, for increasing the power output of luffing elevator.In structure of the present utility model, the luffing pulley block structure be not integral solder on turntable, but the luffing pulley block structure can be arranged to two states: the first state is the luffing pulley block structure state fixing with respect to turntable (referring to Fig. 2); The second state is that the luffing pulley block structure can be with respect to the state of turntable rotation.Under the first state, the effect of luffing pulley block structure is with identical in the prior art.Under the second state, the first point of connection disengagement of the second hold-down arm and being connected of rotating platform of crane, thus the luffing pulley block structure can rotate (referring to Fig. 3) with respect to turntable around the first point of connection of the first hold-down arm.And then, can under the second state, described luffing assembly pulley be used for slinging weight, the turntable counterweight of for example slinging, thereby installation or removal turntable counterweight.
Fig. 6 is the schematic diagram with the luffing assembly pulley of two hold-down arms of the utility model the first embodiment, and Fig. 7 is the decomposing schematic representation of luffing pulley block structure shown in Figure 6.As shown in Fig. 6-7, comprise luffing assembly pulley 7 and two hold-down arms according to the luffing pulley block structure of the utility model the first embodiment: the first hold-down arm 71 and the second hold-down arm 72.
As shown in Figure 7, the first hold-down arm 71 has the first point of connection 71a and the second point of connection 71b.The first point of connection 71a is positioned at the upper end of the first hold-down arm 71, and the second point of connection 71b is positioned at the lower end of the first hold-down arm 71.In shape, the first point of connection 71a be connected point of connection 71b and be the connection pin-and-hole.The first point of connection 71a is used for being hinged to by the first bearing pin 16 turntable 2 of described hoisting crane.The second point of connection 71b of the first hold-down arm is connected with luffing assembly pulley 7, for example, links together by bearing pin 17 and the luffing assembly pulley that passes luffing assembly pulley center.
Be understandable that, the first point of connection 71a of the first hold-down arm 71 and particular location and the shape of the second point of connection 71b are not limited to above-mentioned situation.For example, the first point of connection 71a and the second point of connection 71b can be the form of bearing pin.Even the second point of connection 72b can take any suitable connection mode, as is threaded.The first point of connection 71a does not need to be positioned at the end, if close on the upper end, perhaps is positioned at the place, top, and perhaps center also is fine.The second point of connection 71b does not need to be positioned at the end yet, if close on the bottom, perhaps is positioned at the place, top, and perhaps center also is fine.
As shown in Figure 7, the second hold-down arm 72 has the first point of connection 72a and the second point of connection 72b.The first point of connection 72a is positioned at the upper end of the second hold-down arm 72, and the second point of connection 72b is positioned at the lower end of the second hold-down arm 72.In shape, the first point of connection 72a be connected point of connection 72b and be the connection pin-and-hole.The first point of connection 72a of the second hold-down arm 72 releaseably is connected to the turntable 2 of described hoisting crane, for example, links together by bearing pin 15 and turntable 2.The second point of connection 72b of the second hold-down arm is connected with luffing assembly pulley 7, for example, links together by bearing pin 17 and the luffing assembly pulley that passes luffing assembly pulley center.
Be understandable that, the first point of connection 72a of the second hold-down arm 72 and particular location and the shape of the second point of connection 72b are not limited to above-mentioned situation.For example, the first point of connection 72a and the second point of connection 72b can be the form of bearing pin, even can take any suitable connection mode, as be threaded.As long as the first point of connection 72a releaseably is connected to the turntable of described hoisting crane.The first point of connection 72a does not need to be positioned at the end, if close on the upper end, perhaps is positioned at the place, top, and perhaps even center also is fine.The second point of connection 72b does not need to be positioned at the end yet, if close on the bottom, perhaps is positioned at the place, top, and perhaps center also is fine.
Can also comprise weight connecting device (not shown) according to the luffing pulley block structure of the utility model the first embodiment, be used for weight is connected to described luffing pulley block structure.Thereby when the luffing pulley block structure rotates around the first bearing pin 16, drive the weight motion.For example, described weight can be the counterweight of turntable 2.Described weight connecting device can be taked any appropriate configuration, as long as weight and luffing assembly pulley can be linked together.For example, described weight connecting device can be arm-tie or stay cord, and an end of arm-tie or stay cord is fixedly connected on the luffing assembly pulley, and the other end is fixedly connected on weight.
In the prior art, the luffing pulley block structure be integral solder on turntable, only a plurality of luffing pulleys on it can rotate, and increase the power output of luffing elevator by a plurality of pulleys.But, luffing pulley block structure of the present utility model be not integral solder on turntable, but have two states: the first state is the state fixing with respect to turntable; The second state is can be with respect to the state of turntable rotation.
Under the first state, the first point of connection 71a of the first hold-down arm 71 be hinged to by the first bearing pin 16 described hoisting crane turntable 2, the second hold-down arms 72 the first point of connection 72a by the second bearing pin 15(releaseably) be connected to the turntable 2 of described hoisting crane.The effect of luffing pulley block structure is with identical in the prior art.
Under the second state, extract bearing pin 15, thus the first point of connection 72a disengagement of the second hold-down arm 72 and being connected of rotating platform of crane 2.At this moment, the luffing pulley block structure can rotate with respect to turntable 2 around the first point of connection 71a or the bearing pin 16 of the first hold-down arm.Like this, under the second state, described luffing assembly pulley can be used for slinging weight, the turntable counterweight of for example slinging, thereby installation or removal turntable counterweight.
Be connected with the center shaft (being bearing pin 16) of luffing assembly pulley 7 although the second point of connection 71b of the first hold-down arm 71 and the second point of connection 72b of the second hold-down arm 72 are shown in the drawings, the utility model is not limited in this.For example, the second point of connection 71b and 72b can be not overlapped, thereby are connected with described luffing assembly pulley 7 in different positions, neither adopt the mode that connects by bearing pin.As long as described the second point of connection 71b is connected with luffing assembly pulley 7 with 72b.In a not shown embodiment, the second point of connection 71b is welded on the primary importance of support (not shown) of luffing assembly pulley 7, and the second point of connection 71b is welded on another position of support of luffing assembly pulley 7.
Fig. 8 is the schematic diagram with the luffing assembly pulley of bracing frame of the utility model the second embodiment.As shown in Figure 8, the first hold-down arm 71 and the second hold-down arm 72 are one-body molded and form the bracing frame 70 of luffing assembly pulley 7.The second point of connection of the first hold-down arm overlaps into a point of connection with the second point of connection of the second hold-down arm.As shown in Figure 8, the point of connection of this coincidence is connected with bearing pin 17.
Advantageously, above-mentioned luffing pulley block structure further comprises main transformer width elevator 5 and main transformer width rope 6.When throwing off, described main transformer width elevator 5 can drive described luffing assembly pulleys 7 by main transformer width rope 6 and rotate around the first point of connection 71a of the first hold-down arm being connected between the first point of connection 72a of the second hold-down arm and turntable 2.
As previously mentioned, the utility model also provides a kind of hoisting crane, and described hoisting crane comprises luffing pulley block structure as above, and wherein, described weight connecting device is used for crane counterweight is connected to described luffing pulley block structure.Thereby the luffing pulley block structure that makes hoisting crane of the present utility model can be used for substituting oil cylinder of the prior art, thereby reduces costs.
Fig. 2 is the schematic diagram according to the hoisting crane of the cancellation jack cylinder of the utility model one embodiment.Fig. 3 is another schematic diagram of hoisting crane shown in Figure 2, and at state shown in Figure 3, the luffing pulley block structure is in can be with respect to the state of turntable around a hinge-point rotation.Fig. 7 is the another schematic diagram of hoisting crane shown in Figure 5, and in shown position, the luffing pulley block structure is connected with the turntable counterweight.
In Fig. 2-3 and hoisting crane shown in Figure 5, hoisting crane also comprises turntable 2, mast 1 and mast registration device except the luffing pulley block structure that comprises above-mentioned convertible mode of operation.
As shown in Figure 2, the lower hinge of mast 1 (more specifically, being positioned at the point of connection of mast 1 one ends, is the point of connection that is positioned at mast 1 lower end in Fig. 2) is hinged on turntable 2, and the place, top (more specifically, at other end place) of mast 1 is provided with fixed pulley group 21.
Main transformer width rope 6 is connected to described luffing assembly pulley 7 from described main transformer width elevator 5 through fixed pulley group 21.Main transformer width rope 6 is walked around the fixed position of the other end after luffing assembly pulley 7, can reach as required actual condition of service setting.The other end of main transformer width rope has multiple fixed form.For example, for the main transformer width elevator 5 of single rope stretching, because the multiplying power of main transformer width rope is different, can be linked on an arm-tie of luffing assembly pulley 7; Also can be linked on the arm-tie of the fixed pulley group 21 on mast 1.For the main transformer width elevator 5 of double-rope, the two ends of main transformer width rope may all be bound up on main transformer width elevator 5.
The mast registration device is used for mast 1 is located with respect to described turntable 2, determines mast 2 angle with respect to the horizontal plane.The mast registration device can have numerous embodiments.
In one embodiment, the mast registration device comprises the anti-hypsokinesis 9 of principal arm and pin shaft connecting apparatus.Lower hinge and the described turntable 2 of the anti-hypsokinesis 9 of principal arm are hinged.Pin shaft connecting apparatus is used for releaseably connecting the anti-hypsokinesis 9 of described mast 1 and described principal arm, thereby makes described principal arm prevent that hypsokinesis 9, described turntable 2 connect into triangular structure with described mast 1.
In the embodiment shown in fig. 5, hoisting crane comprises principal arm coxopodite 10 and the anti-hypsokinesis 9 of principal arm.Lower hinge and the described turntable 2 of principal arm coxopodite 10 are hinged.The lower hinge of the anti-hypsokinesis 9 of principal arm (for example, being positioned at the lower end of the anti-hypsokinesis 9 of principal arm) is also hinged with described turntable 2, and the upper hinge of the anti-hypsokinesis 9 of principal arm (for example, being positioned at the upper end of the anti-hypsokinesis 9 of principal arm) is hinged with described principal arm coxopodite 10.Thereby make described principal arm prevent that hypsokinesis 9, described turntable 2 connect into triangular structure with described principal arm coxopodite 10.Form a supporting construction, for the mast registration device provides fixed pedestal.Described mast registration device is mast stay cord 8 or mast pull bar, and an end of described mast stay cord 8 or mast pull bar is connected to described mast, and the other end is connected to described principal arm coxopodite 10.In this embodiment, also can be understood as the mast registration device and comprise: mast stay cord 8 or mast pull bar, and prevent by principal arm the triangular structure that hypsokinesis 9, turntable 2 and principal arm coxopodite 10 are connected to form.
In alternate embodiment shown in Figure 5, hoisting crane comprises that principal arm coxopodite 10 and principal arm coxopodite stay cord 18 provide fixed pedestal for the mast registration device.Lower hinge and the described turntable 2 of principal arm coxopodite 10 are hinged; One end of principal arm coxopodite stay cord 18 is connected with described turntable 2, and the other end is connected to described principal arm coxopodite 10, thereby limits the relative position of described principal arm coxopodite 10 and described turntable 2.Described mast registration device is mast stay cord 8 or mast pull bar, and an end of described mast stay cord 8 or mast pull bar is connected to described mast, and the other end is connected to described principal arm coxopodite 10.
Described hoisting crane can be crawler crane.
Thereby, in the utility model, luffing assembly pulley 7 is designed to separately the swing arm of the platform 2 rear end rotations that can rotate.By members such as the anti-hypsokinesis 9 of principal arm coxopodite 10 and principal arm, that mast 1 is fixing, realize dismounting to turntable counterweight 4 by the rotation of luffing assembly pulley 7.
Bearing pin 16 rotations that the first hold-down arm 71 of luffing assembly pulley 7 can rotate platform 2 can realize that the parallel motion of counterweight 4 is with vertical mobile.The installation site of counterweight is determined by the final position of the first hold-down arm 71, and can be guaranteed to dismantle reposefully counterweight 4.Main transformer width rope can be realized 6 multiplying powers or larger multiplying power after luffing assembly pulley amplification.The pulling force that this structure provides is large, by main transformer width rope 6(prime power from main transformer width elevator 5) power is provided, can satisfy the integral disassembly, assembly of counterweight 4.Be understandable that, main transformer width rope list rope tension is constant, but through after the amplification of pulley block structure, the total pulling force that main transformer width rope provides=single rope tension * multiplying power, the utility model can take full advantage of the large characteristic of luffing mechanism pulley block ratio, realizes that the integral body of counterweight is from dismounting.
The concrete steps that the turntable counterweight is installed can be as follows:
The first step as shown in Figure 2, links together mast 1 and principal arm coxopodite 10 with stay cord 8; Successively polylith counterweight component 4a is sling with hoist rope 11, being assembled together becomes counterweight 4.
Second step: crane mainframe is reached the appropriate location, for example, the position of the center of gravity of counterweight 4 under the luffing assembly pulley.
The 3rd step: principal arm coxopodite 10 is played the maximum functional angle, insert bearing pin 12(and see Fig. 4), with the inner sleeve 13 of the anti-hypsokinesis 9 of principal arm with outer tube 14 at axial restraint (seeing Fig. 3 and Fig. 4).
The 4th step: remove the bearing pin 15 that luffing assembly pulley 7 is connected with turntable 2, put main transformer width rope 6, the bracing frame 71 of luffing assembly pulley 7 is rotated down (see figure 3) around bearing pin 16 at this moment.
The 5th step: luffing assembly pulley 7 and counterweight 4 are linked together with arm-tie or other weight connecting devices.
The 6th step: receive main transformer width rope 6, this moment, luffing assembly pulley 7 drive counterweights 4 rotated up around bearing pin 16 together, after counterweight reaches the installation site, bearing pin or other connecting devices are installed counterweight 4 is connected on turntable 2.
The 7th step: bearing pin 15 is installed luffing assembly pulley 7 is connected with turntable 2.
Dismounting counterweight operating mode is the inverse step of assembling operating mode.
Functional analysis: the utility model is made two fixed triangle shape systems with the anti-hypsokinesis 9 of principal arm coxopodite 10, principal arm, stay cord 8, mast 1, turntable 2, has namely guaranteed the stable of head of mast, has reduced again the stressed of each parts; Main transformer width multiplying power is many, and the pulling force that provides is large, can guarantee the integral demounting of turntable counterweight 4; The bracing frame 71 of luffing assembly pulley 7 is realized vertical movement and the parallel motion of counterweight in bearing pin 16 rotary courses, makes simultaneously the movement of counterweight more steady.
The utility model is only done local the change to structure, and from the dismounting function, cost increases less, easy and simple to handle with respect to non-.With respect to adopting oil cylinder to carry out scheme from dismounting, the utility model has reduced the cost of oil cylinder and hydraulic control, has improved the stability from dismounting.
It is to be noted at last: above embodiment only in order to the technical solution of the utility model to be described, is not intended to limit.Although with reference to previous embodiment, the utility model is had been described in detail, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme that aforementioned each embodiment puts down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the spirit and scope of each embodiment technical scheme of the utility model.
Claims (10)
1. a luffing pulley block structure that is used for hoisting crane, is characterized in that, comprising:
Luffing assembly pulley (7);
The first hold-down arm (71), first point of connection (71a) of described the first hold-down arm is used for being hinged to by the bearing pin mode turntable (2) of described hoisting crane, and second point of connection (71b) of described the first hold-down arm is connected with described luffing assembly pulley (7); And
The second hold-down arm (72), first point of connection (72a) of described the second hold-down arm releaseably is connected to the turntable (2) of described hoisting crane, and second point of connection (72b) of described the second hold-down arm is connected with described luffing assembly pulley (7).
2. luffing pulley block structure as claimed in claim 1, it is characterized in that, second point of connection (71b) of described the first hold-down arm (71) is connected with the center shaft of described luffing assembly pulley (7), and second point of connection (72b) of described the second hold-down arm (72) is connected with the center shaft of described luffing assembly pulley (7).
3. luffing pulley block structure as claimed in claim 2, it is characterized in that, described the first hold-down arm and described the second hold-down arm are one-body molded and form the bracing frame (70) of described luffing assembly pulley (7), wherein, second point of connection (71b) of described the first hold-down arm overlaps with second point of connection (72b) of described the second hold-down arm.
4. luffing pulley block structure as claimed in claim 3, it is characterized in that, further comprise main transformer width elevator (5) and main transformer width rope (6), when throwing off, described main transformer width elevator (5) can drive described luffing assembly pulley (7) by described main transformer width rope (6) and rotate around first point of connection (71a) of described the first hold-down arm being connected between first point of connection (72a) of described the second hold-down arm and described turntable (2).
5. a hoisting crane, is characterized in that, comprises luffing pulley block structure as claimed in claim 4.
6. hoisting crane as claimed in claim 5, is characterized in that, further comprises:
Mast (1), the lower hinge of described mast (1) are hinged on described turntable (2), and place, the top of described mast is provided with fixed pulley group (21); And
The mast registration device is used for described mast (1) is located with respect to described turntable (2),
Wherein, described main transformer width rope is connected to described luffing assembly pulley (7) from described main transformer width elevator through described fixed pulley group (21).
7. hoisting crane as claimed in claim 6, is characterized in that, described mast registration device comprises:
Principal arm is prevented hypsokinesis (9), described principal arm prevent the lower hinge of hypsokinesis (9) and described turntable (2) hinged, and
Pin shaft connecting apparatus is used for releaseably connecting the anti-hypsokinesis (9) of described mast (1) and described principal arm, thereby makes described principal arm prevent that hypsokinesis (9), described turntable (2) connect into triangular structure with described mast (1).
8. hoisting crane as claimed in claim 6, is characterized in that, further comprises:
Principal arm coxopodite (10), its lower hinge and described turntable (2) are hinged;
Principal arm is prevented hypsokinesis (9), described principal arm prevent the lower hinge of hypsokinesis (9) and described turntable (2) hinged, upper hinge and described principal arm coxopodite (10) are hinged, thereby make described principal arm prevent that hypsokinesis (9), described turntable (2) connect into triangular structure with described principal arm coxopodite (10)
Wherein, described mast registration device is mast stay cord (8) or mast pull bar, and an end of described mast stay cord (8) or mast pull bar is connected to described mast, and the other end is connected to described principal arm coxopodite (10).
9. hoisting crane as claimed in claim 6, is characterized in that, further comprises:
Principal arm coxopodite (10), its lower hinge and described turntable (2) are hinged;
Principal arm coxopodite stay cord (18), an end of described principal arm coxopodite stay cord (18) is connected with described turntable (2), and the other end is connected to described principal arm coxopodite (10), thereby limits the relative position of described principal arm coxopodite (10) and described turntable (2);
Wherein, described mast registration device is mast stay cord (8) or mast pull bar, and an end of described mast stay cord (8) or mast pull bar is connected to described mast, and the other end is connected to described principal arm coxopodite (10).
10. hoisting crane as claimed in claim 9, is characterized in that, described hoisting crane is crawler crane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220657941 CN203021223U (en) | 2012-12-03 | 2012-12-03 | Variable-amplitude pulley block structure for crane and crane with mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220657941 CN203021223U (en) | 2012-12-03 | 2012-12-03 | Variable-amplitude pulley block structure for crane and crane with mechanism |
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| Publication Number | Publication Date |
|---|---|
| CN203021223U true CN203021223U (en) | 2013-06-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220657941 Withdrawn - After Issue CN203021223U (en) | 2012-12-03 | 2012-12-03 | Variable-amplitude pulley block structure for crane and crane with mechanism |
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| Country | Link |
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| CN (1) | CN203021223U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103395703A (en) * | 2013-07-30 | 2013-11-20 | 中联重科股份有限公司 | Supporting mechanism and engineering machine of arm support |
| CN103848362A (en) * | 2012-12-03 | 2014-06-11 | 北汽福田汽车股份有限公司 | Variable amplitude pulley block structure for crane and crane with same |
| CN104495637A (en) * | 2014-12-16 | 2015-04-08 | 中联重科股份有限公司 | Self-disassembling device of crane, crane and self-disassembling method |
-
2012
- 2012-12-03 CN CN 201220657941 patent/CN203021223U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103848362A (en) * | 2012-12-03 | 2014-06-11 | 北汽福田汽车股份有限公司 | Variable amplitude pulley block structure for crane and crane with same |
| CN103848362B (en) * | 2012-12-03 | 2016-02-10 | 北汽福田汽车股份有限公司 | A kind of for the luffing pulley block structure of hoisting crane and the hoisting crane with this mechanism |
| CN103395703A (en) * | 2013-07-30 | 2013-11-20 | 中联重科股份有限公司 | Supporting mechanism and engineering machine of arm support |
| CN103395703B (en) * | 2013-07-30 | 2015-12-02 | 中联重科股份有限公司 | The supporting mechanism of jib and construction machinery and equipment |
| CN104495637A (en) * | 2014-12-16 | 2015-04-08 | 中联重科股份有限公司 | Self-disassembling device of crane, crane and self-disassembling method |
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