CN102874694B - Hoisting crane and super lifting device thereof - Google Patents
Hoisting crane and super lifting device thereof Download PDFInfo
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- CN102874694B CN102874694B CN201210370015.8A CN201210370015A CN102874694B CN 102874694 B CN102874694 B CN 102874694B CN 201210370015 A CN201210370015 A CN 201210370015A CN 102874694 B CN102874694 B CN 102874694B
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Abstract
The invention discloses a kind of hoisting crane and super lifting device thereof, this super lifting device is used for hoisting crane, comprises and has surpassed support, super lift winch and strain component, wherein, on the rotary table that super lift winch is arranged on hoisting crane or the afterbody of the principal arm frame of hoisting crane; Strain component is connected with the top of the principal arm frame of super lift winch and hoisting crane simultaneously; The first end having surpassed support, for being hinged to the principal arm frame of hoisting crane, has surpassed the second end of support for supporting strain component.Super lift winch of the present invention is arranged on the rotary table of hoisting crane, and not with surpassed support and be wholely set, alleviate the weight having surpassed support being positioned at higher position, thus reduce the center of gravity of super lifting device, improve super lifting device stability and hang and carry performance, make super lifting device especially surpass the dismounting of support convenient, improve reliability and the work efficiency of super lifting device.
Description
Technical field
The present invention relates to engineering machinery field, particularly a kind of hoisting crane and super lifting device thereof.
Background technology
Due to the needs in market, wheel crane is just continuous to large-tonnage, super-tonnage future development, and hoisting crane lifting tonnage and hang a continuous increase of carrying height, also more and more higher to the requirement of the length of arm, intensity and rigidity.At present, the hoister in large tonnage on market, in order to improve the rigidity of arm, reduces amount of deflection and side sway, employs super lifting device.Existing super lifting device has gate and two kinds, Y type, and its structure generally has: the first take-up device, the second take-up device, support slewing arrangement, surpassed amplitude oil cylinder.Support is furnished with ratchet device, i.e. super lift winch, super lift winch position has three kinds of selections usually: support is near head position place, and support is near tail position place, and support is near medium position place.
Adopt and current surpassed form, there is following shortcoming:
1) super lift winch is arranged on and has surpassed on support, and super lift winch almost accounts for the half of total weight, makes whole super lifting device weight very heavy, increases the difficulty of on-the-spot dismounting;
2) super lifting device preponderance, causes in car load hoisting process, arm center of gravity being moved, thus reduction car load hangs year stability and a fine motion, reduces the bearing capacity hanging and carry performance and increasing basic arm;
3) in car load hoisting process, super lift winch position is too high, is inconvenient to safeguard and control.
In addition, complicated to the synchro control of take-up device in existing super lifting device support, highly rely on sensor easy break-down element, system reliability reduces.
Summary of the invention
In view of this, the present invention proposes a kind of hoisting crane and super lifting device thereof, this super lifting device can by super lift winch with surpassed support and be separated, and super lift winch is arranged on the lower positions such as rotating platform of crane, solves the high problem such as dismounting difficulty, poor stability caused of super lifting device center of gravity.
On the one hand, the invention provides a kind of super lifting device, for hoisting crane, comprise and surpassed support, super lift winch and strain component, wherein,
Described super lift winch is arranged on the rotary table of described hoisting crane;
Described strain component is connected with the top of the principal arm frame of described super lift winch and described hoisting crane simultaneously;
The described first end having surpassed support is for being hinged to the principal arm frame of described hoisting crane, and described the second end having surpassed support is for supporting described strain component.
Further, described the second end having surpassed support is provided with and has rotatingly surpassed support pulley, described the second end having surpassed support has surpassed strain component described in support pulley support by described, and described the second end having surpassed support can be moved along described strain component by the described support pulley that surpassed.
Further, described the second end having surpassed support is provided with and has multiplely rotatingly surpassed support pulley; And/or the described support that surpassed has multiple, each described the second end having surpassed support is provided with and has rotatingly describedly surpassed support pulley;
Described strain component is multiple, and one_to_one corresponding is walked around and multiplely describedly surpassed support pulley.
Further, described super lift winch comprises organizes winding drum more, and a described many group elevators respectively corresponding winding strain component folding are coaxially arranged.
Further, described multiple surpassed to be provided with between support for by described multiple surpassed that support launches surpassed expanding unit.
Further, described the second end having surpassed support is provided with and has multiplely rotatingly surpassed support pulley; And/or the described support that surpassed has multiple, each described the second end having surpassed support is provided with and has rotatingly surpassed support pulley;
The top of the principal arm frame of described hoisting crane is provided with arm head assembly pulley, described strain component walk around respectively described arm head assembly pulley and multiple described surpassed support pulley after, be connected to the top of the principal arm frame of described hoisting crane.
Further, the described support that surpassed has surpassed strain component described in support pulley support by described, make described strain component surpass support pulley and described strain component contact position for summit form angle with described, the described support that surpassed is positioned on the angular bisector of described angle.
Further, also comprise arm stern sheave group, described arm stern sheave group is arranged on the afterbody of the principal arm frame of described hoisting crane, and described strain component walks around described arm stern sheave group.
Further, the arm tail hinge of described arm stern sheave group and principal arm frame is coaxially arranged.
Further, also comprise the pre-tightening apparatus for strain component described in tensioning, described pre-tightening apparatus is connected with the rotary table of described hoisting crane and described strain component respectively.
Further, described pre-tightening apparatus comprises pre-locking oil cylinder, pretension pulley and pre-clamping joint, wherein,
Cylinder barrel and the described pretension pulley of described pre-locking oil cylinder are arranged on the rotary table of described hoisting crane, and the two ends of described pre-clamping joint are connected with the piston rod of described pre-locking oil cylinder and described strain component respectively;
Described pre-clamping joint walks around described pretension pulley, and parallel with described pre-locking oil cylinder with the described pre-clamping joint between pretension pulley with described at the piston rod of described pre-locking oil cylinder.
Further, described surpassed support and described to have surpassed between support pulley detachable.
On the other hand, the present invention also provides a kind of hoisting crane, comprises rotary table and principal arm frame, is provided with the super lifting device as above described in any one.
Super lifting device of the present invention is used for hoisting crane, and super lift winch is arranged on the rotary table of hoisting crane, and for the elevator of strain component and synchronous, the one end having surpassed support is still hinged to the principal arm frame of hoisting crane, and the other end directly supports strain component; Super lift winch of the present invention is arranged on the rotary table of hoisting crane, and not with surpassed support and be wholely set, alleviate the weight having surpassed support being positioned at higher position, thus reduce the center of gravity of super lifting device, improve super lifting device stability and hang and carry performance, make super lifting device especially surpass the dismounting of support convenient, improve reliability and the work efficiency of super lifting device.
Hoisting crane of the present invention, is provided with above-mentioned super lifting device, therefore has beneficial effect same as described above, repeats no more.
Accompanying drawing explanation
The accompanying drawing forming a part of the present invention is used to provide a further understanding of the present invention, and schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the structural representation of a kind of embodiment of super lifting device of the present invention;
Fig. 2 is the structural representation of the another kind of embodiment of super lifting device of the present invention;
Fig. 3 is the structural representation of another embodiment of super lifting device of the present invention;
Fig. 4 is the operating angle schematic diagram having surpassed support of super lifting device of the present invention;
Fig. 5 is the structural representation of the pre-tightening apparatus in super lifting device embodiment of the present invention;
Fig. 6 is the structural representation having surpassed support and surpassed support pulley of the present invention.
Description of reference numerals:
1, chassis; 2, rotary table; 3, super lift winch; 4, pre-locking oil cylinder; 6, support pulley has been surpassed; 7, support has been surpassed; 8, strain component; 9, arm head support; 10, arm head assembly pulley; 11, principal arm frame; 12, supporting oil cylinder has been surpassed; 13, arm stern sheave group; 14, amplitude oil cylinder; 15, expansion oil cylinder has been surpassed; 16, pulley is connected; 17, pretension pulley; 18, pre-clamping joint.
Detailed description of the invention
It should be noted that, when not conflicting, the embodiment in the present invention and the feature in embodiment can combine mutually.Below with reference to the accompanying drawings and describe the present invention in detail in conjunction with the embodiments.
Below in conjunction with accompanying drawing 1-6, and super lifting device is to be arranged on hoisting crane, elaborates to embodiments of the invention:
As shown in Figure 1, the invention provides a kind of super lifting device, it is for hoisting crane, comprises and has surpassed support 7, super lift winch 3 and strain component 8, and wherein, super lift winch 3 is arranged on the rotary table 2 of described hoisting crane; Strain component 8 is connected with the top of the principal arm frame 11 of super lift winch 3 and described hoisting crane simultaneously; The first end having surpassed support 7, for being hinged to the principal arm frame 11 of hoisting crane, has surpassed the second end of support 7 for supporting strain component 8.
Super lifting device of the present invention is used for hoisting crane, and super lift winch 3 is arranged on the rotary table 2 of hoisting crane, and for the elevator and synchronously of strain component 8, the one end having surpassed support 7 is still hinged to the principal arm frame 11 of hoisting crane, and the other end directly supports strain component 8; Super lift winch 3 of the present invention is arranged on the rotary table 2 of hoisting crane, and not with surpassed support 7 and be wholely set, alleviate the weight having surpassed support 7 being positioned at higher position, thus reduce the center of gravity of super lifting device, improve super lifting device stability and hang and carry performance, make super lifting device especially surpass the dismounting of support 7 convenient, improve reliability and the work efficiency of super lifting device.
It should be noted that super lift winch 3 can also be arranged on the afterbody of the principal arm frame 11 of hoisting crane by super lifting device embodiment of the present invention, thus by super lift winch 3 with surpassed support 7 and be separated setting, also can realize effect same as the previously described embodiments.But for convenience of describing, be hereafter arranged on rotary table 2 for super lift winch 3, the present invention is described in detail.
Super lift winch of the prior art is arranged on the end having surpassed support usually, be connected by strain component between super lift winch with the top of main arm of crane frame, super lift winch is connected with the connecting panel of regular length or pipe link with between ground or crane chassis, and usual selection has surpassed, and support is vertical with principal arm frame to be arranged, this causes having surpassed support as a rule except being subject to bar except pressure, the pulling force effect of the strain component be also subject to and pipe link, is unfavorable for the existing stability having surpassed support.
The present invention has made improvement to the problems referred to above, as shown in Figure 1, the present invention is provided with at the second end having surpassed support 7 and has rotatingly surpassed support pulley 6, the second end having surpassed support 7 supports strain component 8 by having surpassed support pulley 6, and the second end having surpassed support 7 can move along strain component 8 by having surpassed support pulley 6.Super lift winch of the present invention 3 with surpassed support 7 separate design, and be arranged on lower hoisting crane, as on rotary table 2, strain component 8 is steel rope preferably, it can extend from super lift winch 3 place on rotary table 2, walk around surpassed support 7 second end surpassed support pulley 6 after, be connected to the top of principal arm frame 11, cancelling has had the one end on the close ground in existing super lifting device to have the pipe link part of regular length, and directly adopt a strain component 8 to realize tension, and the second end having surpassed support 7 is provided with and has surpassed support pulley 6, it can move along strain component 8, therefore, having surpassed support 7 can by having surpassed supporting construction, be generally and surpassed stretching out or shrinking of supporting oil cylinder 12, change and surpassed the position of support 7 relative to principal arm frame 11, the stressed of support 7 has been surpassed to change.
As preferably, surpass support 7 and support strain component 8 by having surpassed support pulley 6, make this strain component 8 to have surpassed support pulley 6 with strain component 8 contact position for summit forms angle, having surpassed support 7 is positioned on the angular bisector of described angle, specifically as shown in Figure 4, supporting oil cylinder 12 has been surpassed by flexible, regulate the angle γ surpassed between support 7 and principal arm frame 11, make to have surpassed support 7 equal with two place angle α and β of strain component 8, now, according to the synthesis Sum decomposition principle of power, having surpassed the pressure that support 7 is subject to strain component 8 is only along having surpassed the bar of support 7 bearing of trend to pressure, this is conducive to increasing the stability having surpassed support 7.
The same with existing super lifting device, strain component 8 of the present invention also can adopt many multiplying powers to arrange, with under the constant prerequisite of the total pulling force of strain component 8 pairs of principal arm framves 11, alleviate the stressed of wall scroll strain component 8, as shown in Figure 2, super lifting device comprises two and has surpassed support 7, each the second end having surpassed support 7 is provided with and has rotatingly surpassed support pulley 6, two have surpassed to be provided with between support 7 and have surpassed expanding unit, preferably surpass and launched oil cylinder 15, surpassed the flexible of expansion oil cylinder 15 and can control two open angles surpassed between support 7.
Support 7 has been surpassed relative to two, super lifting device of the present invention can arrange two strain components 8 and two super lift winchs 3, each strain component 8 is respectively from the super lift winch of correspondence, respectively corresponding one of pile warp has surpassed support pulley 6, be connected to the top of principal arm frame 11, two groups of strain components 8 form dual-magnification technique strain component jointly.In this kind of situation, in order to ensure the elevator synchro control of two groups of strain components 8, two super lift winchs 3 of two groups of strain component 8 correspondences connection can coaxially be arranged, and jointly by a drive motor, make the running of two super lift winchs 3 synchronous.
Still to realize the pulling force of dual-magnification technique, can also surpass at one and support 7 arranges two surpass support pulley 6, then, after adopting two strain components 8 difference pile warps one to surpass support pulley 6, be connected to the top of principal arm frame 11, form dual-magnification technique strain component.The super lift winch 3 of strain component 8 correspondence adopts coaxial setting equally, ensures the synchro control to strain component 8.
Above-mentioned two kinds of embodiments realizing dual-magnification technique strain component all need two strain components 8, article two, strain component 8 can work alone, be independent of each other, a fault or after breaking wherein, another still can normally work, but two strain component 8 needs two super lift winchs 3, increases the installation control of super lift winch.For this reason, in order to realize dual-magnification technique strain component, can also configure as follows:
Surpass support 7 and surpassed the set-up mode of support pulley 6 as above, namely comprise two and surpass support 7, each the second end having surpassed support 7 is provided with and has rotatingly surpassed support pulley 6, two have surpassed to be provided with between support 7 and have surpassed expanding unit, preferably surpass and launched oil cylinder 15, surpassed the flexible of expansion oil cylinder 15 and can control two open angles surpassed between support 7;
Or one has surpassed and support 7 arranges two has surpassed support pulley 6.
But strain component 8 can only select one in which, and arrange arm head assembly pulley 10 at the top of the principal arm frame 11 of hoisting crane, as Figure 1-3, arm head assembly pulley 10 is arranged on the top of principal arm frame 11 preferably by arm head support 9 simultaneously.In actual design, the pulley quantity of arm head assembly pulley 10 can according to the quantity configuration having surpassed support pulley 6, makes the pulley of arm head assembly pulley 10 can be corresponding with having surpassed support pulley 6.During installation, this strain component 8 stretches out from super lift winch 3, and pile warp one has surpassed support pulley 6, and then walks around arm head assembly pulley 10, support pulley 6 from arm head assembly pulley 10 wraparound is super through another, on the rotary table 2 being finally connected to hoisting crane or chassis 1.Thus this embodiment utilizes a strain component 8 to form the configuration mode of dual-magnification technique, on the basis constant to the total pulling force of principal arm frame 11, reduce the pulling force on this wall scroll strain component.
It should be noted that, 1) above-mentioned only for dual-magnification technique, the canoe of more multiplying powers can be adopted according to the actual requirements, 2) above-mentioned the second end having surpassed support 7 arranges multiple when having surpassed support pulley 6, and as Figure 1-3, multiple support pulley 6 that surpassed can be successively set on along having surpassed support 7 the second end having surpassed support 7, also can be configured to assembly pulley form, 3) super lifting device individually can adopt the one in above-mentioned two kinds of modes, preferably can also adopt combination in two ways, scheme such as shown in Fig. 2, it comprises two and has surpassed support 7, each surpassed support 7 on be provided with two and surpassed support pulley 6, its two strain components 8 adopted and two super lift winchs 3, each strain component 8 respectively correspondence one has surpassed support 7 and a super lift winch 3, during installation, two super lift winchs 3 are coaxially arranged, strain component 8 lays out from the super lift winch 3 of correspondence, what pile warp was corresponding of having surpassed on support 7 has surpassed support pulley 6, again after pile warp arm head assembly pulley 10, another of what wraparound was corresponding surpassed support 7 has surpassed support pulley 6, finally be connected to hoisting crane.
In the various embodiments described above, when after strain component 8 tensioning installation, if amplitude oil cylinder 14 drives principal arm frame 11 to carry out luffing operation, then need the strain component 8 discharging tensioning, after principal arm frame 11 reaches operating angle, again tensioning is carried out to strain component 8, work efficiency is reduced for avoiding this repetition tensioning operation, super lifting device of the present invention can also comprise arm stern sheave group 13, arm stern sheave group 13 is arranged on the bottom of the principal arm frame 11 of described hoisting crane, and strain component 8 walks around arm stern sheave group 13.The pulley quantity of arm stern sheave group 13 can make corresponding selection according to the multiplying power number of strain component 8.
There is the super lifting device of arm stern sheave group 13 when mounted, strain component 8 stretches out rear first pile warp arm stern sheave group 13 from super lift winch 3, then pile warp has surpassed support pulley 6, arm head assembly pulley 10 successively, if adopt many multiplying powers to arrange, then need to continue to repeat pile warp and surpassed support pulley 6, arm stern sheave group 13, arm head assembly pulley 10,, until on last strain component 8 turntable 3 that is fixedly attached to hoisting crane or principal arm frame 11, complete the setting of strain component 8.
There is the super lifting device of arm stern sheave group 13 after installing, tensioning strain component 8, then strain component 8 and principal arm frame 11 form a triangle, and vertex of a triangle is the bottom (i.e. arm stern sheave group 13) of principal arm frame 11 respectively, the top (i.e. arm head assembly pulley 10) of principal arm frame 11 and surpassed support pulley 6.So, when amplitude oil cylinder 14 drives principal arm frame 11 to carry out luffing operation, strain component 8 with surpassed support 7 and can carry out luffing together with principal arm frame 11, the length of the strain component 8 of tensioning can not be affected, thus without the need to carrying out re-tensioning to strain component 8, decrease the control step in crane amplitude variation process, greatly improve work efficiency, can also ensure to have surpassed the strained condition that support 7 remains the best simultaneously.
As a kind of preferred embodiment, above-mentioned arm stern sheave group 13 is coaxially arranged with the arm tail hinge of principal arm frame 11.
The present invention also provides one more preferred super lifting device embodiment on the basis of the various embodiments described above, and it can also comprise the pre-tightening apparatus for tensioning strain component 8, and this pre-tightening apparatus is connected with the rotary table 2 of described hoisting crane and strain component 8 respectively.In actual mechanical process, utilize separately super lift winch 3 to be difficult to strain component 8 to carry out complete tensioning, therefore need to use external pre-tightening apparatus and further tensioning is carried out to strain component 8, make strain component 8 play better effect.
Further, as shown in Figure 5, described pre-tightening apparatus can comprise pre-locking oil cylinder 4, pretension pulley 17 and pre-clamping joint 18, wherein, the cylinder barrel of pre-locking oil cylinder 4 and pretension pulley 17 are arranged on the rotary table 2 of described hoisting crane, the two ends of pre-clamping joint 18 are connected with the piston rod of pre-locking oil cylinder 4 and strain component 8 respectively, and preferably pre-clamping joint 18 connects pulley 16 by one and is connected with strain component 8; Pre-clamping joint 18 walks around pretension pulley 17, and it is parallel with pre-locking oil cylinder 4 with the pre-clamping joint 18 between pretension pulley 17 at the piston rod of pre-locking oil cylinder 4, to ensure that the piston rod of pre-locking oil cylinder 4 is only subject to bar to pulling force as far as possible, the strain component comparing the direct tractive super lifting device of existing pretension piston for cylinder is compared, improve cylinder force, and this bar is born to the rodless cavity of pulling force by pre-locking oil cylinder 4, rodless cavity can provide larger more stable predetermincd tension than rod chamber.
Except aforesaid way, pre-tightening apparatus can also be configured to other modes, such as the ratchet device of similar elevator, and its propulsive effort can have electronic or HM Hydraulic Motor to provide.
The super lift winch 3 of super lifting device of the present invention and surpassed support 7 and adopt separation design, the self structure and the alerting ability that have surpassed support 7 improve, surpass support 7 and surpassed support pulley 6 and be preferably configured to detachable installation, as shown in Figure 6, having surpassed support pulley 6 is arranged on pulley support, there is pin-and-hole the end of pulley support with the end opens having surpassed support 7, and the two utilizes bearing pin to realize card dismounting connection; Also removably connecting of other modes can be adopted.Thus, when dismantling super lifting device, strain component 8 can not be torn open, and only be separated having surpassed support pulley 6 support 7 from super, then can select the ad-hoc location being fixed to principal arm frame 11, realize the dismantlement work of super lifting device fast.
In addition, super lift winch 3 of the present invention is arranged on the rotary table 2 of hoisting crane, and under some operating mode, it can also replace master winch temporarily, carries out lifting work.
To sum up, super lifting device of the present invention at least tool have the following advantages:
1, super lift winch with surpassed support and be separated, alleviate the weight having surpassed support, reduce the center of gravity of super lifting device, promote the stability of super lifting device and hang and carry a performance;
2, the expanded angle having surpassed support is adjustable, is easy to select optimum position, and cancels original tension pipe link near ground, improves and has surpassed the stressed of support, increase stability;
3, multiple super lift winch coaxial design, more easily realizing synchronous hoist, realizing synchro control to having surpassed;
4, the arm stern sheave group increased makes to form stable triangle between strain component and principal arm frame, when main luffing range of cantilever support operation, need not carry out operation bidirectional, increase work efficiency to super lifting device;
5, surpassed support and surpass support pulley and detachably install, can quick separating strain component and surpassed support, quick-detachment super lifting device.
Correspondingly, the present invention also provides a kind of hoisting crane, comprises chassis, rotary table and principal arm frame, is also provided with any one super lifting device as above.This crane tool has all advantages of as above super lifting device, repeats no more herein.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (12)
1. a super lifting device, for hoisting crane, is characterized in that, comprises and has surpassed support (7), super lift winch (3) and strain component (8), wherein,
Described super lift winch (3) is arranged on the afterbody of the principal arm frame (11) of the upper or described hoisting crane of the rotary table (2) of described hoisting crane;
Described strain component (8) is connected with the top of the principal arm frame (11) of described super lift winch (3) and described hoisting crane simultaneously;
The described first end having surpassed support (7) is hinged to the principal arm frame (11) of described hoisting crane, and described the second end having surpassed support (7) supports described strain component (8);
Also comprise arm stern sheave group (13), described arm stern sheave group (13) is arranged on the bottom of the principal arm frame (11) of described hoisting crane, and described strain component (8) walks around described arm stern sheave group (13).
2. super lifting device according to claim 1, it is characterized in that, described the second end having surpassed support (7) is provided with and has rotatingly surpassed support pulley (6), described the second end having surpassed support (7) supports described strain component (8) by the described support pulley (6) that surpassed, and described the second end having surpassed support (7) can be moved along described strain component (8) by the described support pulley (6) that surpassed.
3. super lifting device according to claim 2, is characterized in that, described the second end having surpassed support (7) is provided with and has multiplely rotatingly surpassed support pulley (6); Described strain component (8) is for multiple, and one_to_one corresponding is walked around and multiplely describedly surpassed support pulley (6).
4. super lifting device according to claim 3, is characterized in that, described super lift winch (3) comprises organizes winding drum more, and described many group winding drum difference corresponding winding strain components (8) are also coaxially arranged.
5. super lifting device according to claim 2, is characterized in that, the described support (7) that surpassed has multiple, and each described the second end having surpassed support (7) is provided with and has rotatingly describedly surpassed support pulley (6); Described multiple surpassed to be provided with between support (7) for by described multiple surpassed that support (7) launches surpassed expanding unit.
6. super lifting device according to claim 2, is characterized in that, described the second end having surpassed support (7) is provided with and has multiplely rotatingly surpassed support pulley (6); And/or the described support (7) that surpassed has multiple, each described the second end having surpassed support (7) is provided with and has rotatingly surpassed support pulley (6);
The top of the principal arm frame (11) of described hoisting crane is provided with arm head assembly pulley (10), described strain component (8) walk around respectively described arm head assembly pulley (10) and multiple described surpassed support pulley (6) after, be connected to the top of the principal arm frame (11) of described hoisting crane.
7. super lifting device according to claim 2, it is characterized in that, the described support (7) that surpassed supports described strain component (8) by the described support pulley (6) that surpassed, make described strain component (8) be that summit forms angle with described support pulley (6) and described strain component (8) contact position of having surpassed, the described support (7) that surpassed is positioned on the angular bisector of described angle.
8. according to the super lifting device in claim 1-7 described in any one, it is characterized in that, described arm stern sheave group (13) is coaxially arranged with the arm tail hinge of principal arm frame (11).
9. according to the super lifting device in claim 1-7 described in any one, it is characterized in that, also comprise the pre-tightening apparatus for strain component described in tensioning (8), described pre-tightening apparatus is connected with the rotary table (2) of described hoisting crane and described strain component (8) respectively.
10. super lifting device according to claim 9, is characterized in that, described pre-tightening apparatus comprises pre-locking oil cylinder (4), pretension pulley (17) and pre-clamping joint (18), wherein,
The cylinder barrel of described pre-locking oil cylinder (4) and described pretension pulley (17) are arranged on the rotary table (2) of described hoisting crane, and the two ends of described pre-clamping joint (18) are connected with the piston rod of described pre-locking oil cylinder (4) and described strain component (8) respectively;
Described pre-clamping joint (18) walks around described pretension pulley (17), and it is parallel with described pre-locking oil cylinder (4) with the described pre-clamping joint (18) between described pretension pulley (17) to be positioned at the piston rod of described pre-locking oil cylinder (4).
11., according to the super lifting device in claim 1-7 described in any one, is characterized in that, described surpassed support (7) and described to have surpassed between support pulley (6) detachable.
12. 1 kinds of hoisting cranes, comprise rotary table (2) and principal arm frame (11), it is characterized in that, be provided with as the super lifting device in claim 1-11 as described in any one.
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| CN201210370015.8A CN102874694B (en) | 2012-09-27 | 2012-09-27 | Hoisting crane and super lifting device thereof |
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| CN201210370015.8A CN102874694B (en) | 2012-09-27 | 2012-09-27 | Hoisting crane and super lifting device thereof |
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| CN103407908A (en) * | 2013-08-29 | 2013-11-27 | 徐州重型机械有限公司 | Crane and front tensioning system of super lifting device thereof |
| CN205527444U (en) * | 2015-11-24 | 2016-08-31 | 徐州重型机械有限公司 | Device and hoisting equipment have been surpassed |
| CN106185655A (en) * | 2016-08-31 | 2016-12-07 | 徐州重型机械有限公司 | Crane arm bracing means and crane |
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| US5803279A (en) * | 1996-09-13 | 1998-09-08 | Pioneer Engineering | Automatically deployable load-line receiving mast structure for limiting deflection of proportionally extendable boom section crane |
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| US4976361A (en) * | 1988-03-23 | 1990-12-11 | Liebherr-Werk Ehingen Gmbh | Mobile crane comprising a telescopic boom |
| CN101659378A (en) * | 2009-08-27 | 2010-03-03 | 三一汽车制造有限公司 | Lift and superlift device thereof |
| CN102351129A (en) * | 2011-10-11 | 2012-02-15 | 三一汽车起重机械有限公司 | Super-lifting device for improving lifting performance of crane and crane |
| CN102530741A (en) * | 2011-12-13 | 2012-07-04 | 中联重科股份有限公司 | Crane and device for measuring length of steel wire rope of crane |
| CN202379623U (en) * | 2011-12-15 | 2012-08-15 | 徐州重型机械有限公司 | Hoisting mechanism and reach stacker |
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| CN102874694A (en) | 2013-01-16 |
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