CN101723260B - Superlift device for telescopic boom and telescopic boom type crane - Google Patents
Superlift device for telescopic boom and telescopic boom type crane Download PDFInfo
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- CN101723260B CN101723260B CN2008101730218A CN200810173021A CN101723260B CN 101723260 B CN101723260 B CN 101723260B CN 2008101730218 A CN2008101730218 A CN 2008101730218A CN 200810173021 A CN200810173021 A CN 200810173021A CN 101723260 B CN101723260 B CN 101723260B
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Abstract
The invention discloses a superlift device for a telescopic boom, which comprises two brackets symmetrically arranged at two sides of a basic boom of a telescopic boom type crane, a first tensioning device and a second tensioning device. The fixed end of the bracket is connected with the basic boom of the telescopic boom type crane; the first tensioning device is arranged between the movable end of the bracket and the outer end part of an arbitrary telescopic boom of the telescopic boom type crane; and the second tensioning device is arranged between the movable end of the bracket and the root of the basic boom. Side opening oil cylinders are arranged between the two brackets and the basic boom. The expansion of the side opening oil cylinders make the brackets swing towards the two sides of the basic boom around the fixed end. Thus, along with the length variation of the side opening oil cylinders, the rotation angle of the brackets towards the outside of the basic boom also changes, which effectively relieves transverse deflection of the boom. The invention also discloses the telescopic boom type crane with the superlift device.
Description
Technical field
The present invention relates to a kind of telescopic boom hoisting crane, be specifically related to telescopic boom with super lifting device and telescopic boom hoisting crane.
Background technology
The telescopic boom hoisting crane with its flexible operation, with to hang, with hanging with the advantage of walking, in engineer operation, obtained widely using.Along with the large scale development of construction project, for each item performance figure of telescopic boom hoisting crane higher requirement has been arranged also, such as: lifting tonnage, operating altitude and amplitude etc.
As everyone knows, improve performance figure such as lifting tonnage, operating altitude and amplitude, the brachium of crane arm can be increasing thereupon with deadweight, and on goliath, the weight of crane arm often accounts for more than 23% of complete machine weight.Thing followed problem is, hoisting crane brachium, the increase that arm is heavy, and with making when hanging loads the stressing conditions of jib more and more abominable, the amount of deflection (be vertical amount of deflection and the transverse deflection of jib) of jib in luffing plane and plane of rotation is increasing.Excessive for fear of the jib amount of deflection, must control gross load; Like this, the total arm length of hoisting crane, lifting altitude and the maximum liter weight that rises have all received serious restriction.
In view of this, need to be resolved hurrily jib load state and effectively improve the problem of mutual restriction between the performance figure such as telescopic arm crane lifting tonnage, operating altitude and amplitude.
In addition; Along with hoisting crane more and more develops to the maximization direction, himself weight is more and more big, based on the restriction of axle load national standard; Large-scale wheel crane only carries the most basic apparatus for work at general motoring condition; Other devices all will pass through other vehicular transport, therefore, and in order to guarantee the characteristics that can shift and get into operating condition fast of wheel crane; The problem that solves mutual restriction between jib load state and the performance figure also need be further considered dismounting, stack-mounted performance voluntarily, to save construction cost.
Summary of the invention
To above-mentioned defective, the technical matters that the present invention solves is, a kind of super lifting device that is used for telescopic boom is provided, to improve the performance figure such as the tonnage that hoists, operating altitude and amplitude of telescopic boom.The present invention also provides a kind of hoisting crane with this super lifting device.
The super lifting device that is used for the telescopic boom hoisting crane provided by the invention comprises at least one support, first take-up device and second take-up device; The fixed end of said support is connected with the basic arm of telescopic boom hoisting crane; Said first take-up device is arranged between the outer end of movable end and the arbitrary telescopic boom of said telescopic arm crane of said support; Said second take-up device is arranged between the root of movable end and said basic arm of said support.
Preferably, also comprise amplitude oil cylinder, said amplitude oil cylinder is arranged between said support and the said basic arm; And the fixed end and the basic arm of said support are hinged, and the flexible of said amplitude oil cylinder makes said support swing in perpendicular around its fixed end.
Preferably, said support, amplitude oil cylinder, first take-up device and second take-up device are respectively two, and are divided into two groups and be symmetricly set on the both sides of the basic arm of telescopic boom hoisting crane.
Preferably, be equipped with side between two supports and the said basic arm and open oil cylinder, said side is opened the flexible of oil cylinder makes that said support all can be around its fixed end rolling to each side to said basic arm.
The angular range of said support side oscillation outside said basic arm is 0 °～45 °.
Preferably, comprise that also two first are hingedly attached that seat and two second are hinged to attach seat; Said two first are hingedly attached seat and are fixedly installed on the both sides of said basic arm respectively; Said two second hinged attach the seat respectively with two first hinged attach the seat hinged; Said second hingedly attaches seat and can hingedly attach seat and in erectting the plane, rotate with respect to first; And the fixed end of said two supports respectively with two second hinged to attach seat hinged, said support can hingedly attach seat and rotates to the outside of said basic arm with respect to second.
Preferably, said first take-up device comprises elevator and is wound in the stay cord on this elevator that wherein, the external part that said elevator is fixedly installed on the movable end of said support, said stay cord is captiveed joint with the outer end of arbitrary telescopic boom; Or the outer end that the external part of said stay cord is captiveed joint with the movable end of said support, said elevator is fixedly installed on arbitrary telescopic boom.
Preferably; Said first take-up device also comprise tensioning hydro-cylinder and with the co-axially fixed ratchet of the reel of said elevator; Said tensioning hydro-cylinder is arranged between said ratchet and the elevator fixed parts, and said tensioning hydro-cylinder promotes the ratchet of said ratchet when stretching out, to strain said stay cord.
Preferably, said second take-up device is a pull bar; Said pull bar comprises the first bar section that is articulated in said support movable end, and the second bar section that is articulated in said basic arm root, and the said first bar section and the second bar section are hinged.
The present invention also provides a kind of telescopic boom hoisting crane, comprises foregoing super lifting device.
At the lift heavy operating condition, the operating attitude of said support is perpendicular with the basic arm of telescopic arm crane substantially.As everyone knows; Weight is being to cause the bigger major cause of telescopic arm crane jib amount of deflection perpendicular to the component on the downward direction of said telescopic boom (being shear direction); First take-up device in the technical scheme of the present invention and second take-up device act on the tractive component on the telescopic boom through support, but the moment of flexure that weight equalizer produces at the jib arm head.Therefore, the strained condition of telescopic boom be improved significantly, the amount of deflection of jib significantly reduces under the equal operation operating mode, has improved the performance figure such as the tonnage that hoists, operating altitude and amplitude of telescopic boom greatly.
In a preferred embodiment of the invention; The fixed end and the basic arm of said support are hinged, and at non-operating condition, said support can parallel setting with basic arm; When needing the heavy load operation; The pressure oil circuit of hoisting crane hydraulic control system and the rodless cavity conducting of said amplitude oil cylinder, said support is being swung in perpendicular (being the luffing plane) around its fixed end under the promotion of amplitude oil cylinder, to perpendicular substantially with basic arm.
Of the present invention another preferred embodiment in; Said support, amplitude oil cylinder, first take-up device and second take-up device are respectively two; And be divided into two groups and be symmetricly set on the both sides of the basic arm of telescopic boom hoisting crane; Can guarantee in the lift heavy operation process that the power that acts on the telescopic boom through support can balancedly act on the both sides of telescopic jib, and then optimize the strained condition of telescopic boom.
Of the present invention another preferred embodiment in; Two supports respectively through first hinged attach seat and second hinged attach that seat is realized and telescopic boom between annexation; During assembling, at first be provided with respectively to install and use bearing in the jib both sides, utilize then telescopic boom successively the said support of handling be positioned over respectively on the erection support of telescopic boom both sides; Last telescopic boom falls when rotating to the midway location of two supports, accomplishes being connected between said two supports and each parts.So far, accomplish said super lifting device from the dismounting operation, satisfy in the telescopic boom hoisting crane optimal design about dismounting, stack-mounted performance requriements voluntarily, meet the research and development trend of existing hoisting crane.
Description of drawings
Fig. 1 is the integral structure scheme drawing of first kind of embodiment of super lifting device provided by the present invention;
Fig. 2 is the outside drawing of elevator according to the invention;
Fig. 3 is the assembly relation scheme drawing that second take-up device according to the invention is a pull bar;
Fig. 4 is the integral structure scheme drawing of second kind of embodiment of super lifting device provided by the present invention;
Fig. 5 is the shaft side figure of looking up of super lifting device shown in Fig. 4;
Fig. 6 is the exploded view of second kind of super lifting device that embodiment provides;
Fig. 7 is the working state schematic representation with telescopic arm crane of super lifting device according to the invention;
Fig. 8 is the erection plan of super lifting device provided by the present invention on hoisting crane.
Among the figure: support 1, first take-up device 2, elevator 21, tighten up oil cylinder 22, ratchet 23, second take-up device 3, the first bar section 31, the second bar section 32, amplitude oil cylinder 4, side and open that oil cylinder 5, first is hinged to attach that 61, two second of seats are hinged to attach seat 62, basic arm 10, telescopic boom 20.
The specific embodiment
Core concept of the present invention is to pass through the super lifting device that provided; Act on the moment of flexure on the telescopic jib with weight equalizer; Can effectively avoid jib to produce, be beneficial to the performance figure such as the tonnage that hoists, operating altitude and amplitude that improve the telescopic boom hoisting crane than deep camber.
Specify this embodiment below in conjunction with Figure of description.
Referring to Fig. 1, this figure is the integral structure scheme drawing of first kind of embodiment of super lifting device provided by the present invention.Super lifting device shown in the figure is arranged on the basic arm 10 of telescopic arm crane.
Basic arm described herein means the first segment arm that is hinged with the telescopic arm crane upper frame part, at least one joint telescopic boom of suit among the said basic arm, and said telescopic boom can stretch out or withdraws with respect to basic arm joint.In addition, jib described herein means the integral body of being made up of above-mentioned basic arm and telescopic boom.
As shown in Figure 1, the super lifting device that is used for the telescopic boom hoisting crane provided by the invention comprises support 1, the cylinder of support 1 for having enough rigidity and intensity, and its fixed end is connected with the basic arm 10 of telescopic arm crane through bearing pin.
First take-up device 2 is provided with between the outer end of movable end and the arbitrary telescopic boom 20 of said telescopic arm crane of said support 1, and when the lift heavy operation, first take-up device 2 is used between the outer end of the movable end of support 1 and telescopic boom 20, forming first pulling force.
Between the movable end that said support 1 is set of second take-up device 3 and the root of said basic arm 10, its two ends respectively with the movable end of said support 1 and the root of basic arm 10, between the movable end of support 1 and basic arm 10, form second pulling force.
Need to prove; An end of second take-up device 4 is connected in the root of basic arm 10 shown in the figure; In fact; Second take-up device 4 can directly be connected with basic arm 10, also can be connected with bearing or other contiguous platform structure of basic arm 10 afterbodys, as long as satisfy the use needs all in the protection domain of this patent.
Further; For being articulated and connected, as shown in the figure between the fixed end of institute's support 1 and the said basic arm 10, amplitude oil cylinder 4 is arranged between support 1 and the basic arm 10; The cylinder barrel end of said amplitude oil cylinder 4 and cylinder rod end are hinged with support 1 and basic arm 10 respectively; When the pressure oil circuit of said hydraulic control system during respectively with the rodless cavity of amplitude oil cylinder 4 or rod chamber conducting, said support 1 can be swung in the luffing plane with respect to basic arm 10, to realize propping or regaining of support 1.Like this, at non-operating condition, said support 1 can parallel setting with basic arm 10; And only need when heavy load operation operating mode, prop support 1, be beneficial to obtain best transaction capabilities.
Above-mentioned first take-up device 2 and second take-up device 3 all can adopt elevator to realize, promptly comprise the elevator of stay cord and the said stay cord of folding and unfolding.
Specifically, elevator 21 (being shown among Fig. 2) can be set at the movable end of support 1, the external part that is wound on the stay cord (not shown among Fig. 2) in the reel of said elevator 21 is captiveed joint with the outer end of arbitrary telescopic boom 20, thereby forms above-mentioned first take-up device 2; In fact, elevator 21 is arranged on the outer end of arbitrary telescopic boom 20, and the external part of said stay cord and the movable end of support 1 also are fine; In addition, said elevator 21 is arranged on the goal of the invention that can realize this patent on middle part or the basic arm 10 of support 1.
In order further to improve and keep the tension force of stay cord, super lifting device provided by the present invention may further include and tightens up oil cylinder 22, tightens up oil cylinder 22 and is arranged on the support 1; Simultaneously, the reel of elevator 21 captive joint ratchet 23 coaxially.
After elevator 21 tightens up; Can promote the ratchet of ratchet 23 through the movable end that tightens up oil cylinder 22 directly or indirectly; And then the reel that drives elevator 21 rotates suitable angle towards the direction continuation of rolling; Therefore can stay cord further be strained, thereby further promote said first pulling force.
Consider that from the angle that alleviates the deadweight of principal arm end the movable end that elevator 21 is arranged at support 1 is more appropriate.In addition, when the end of said stay cord was captiveed joint with the outer end of minor details telescopic boom 20, the force-bearing situation of principal arm was even more ideal, and the degree that its amount of deflection reduces is more remarkable.
Second take-up device 3 can adopt the similar elevator version of first take-up device 2, does not repeat them here.In addition, second take-up device 3 can also have other structure.
For example, second take-up device 3 can be a pull bar; See also Fig. 3, this figure is the assembly relation scheme drawing that second take-up device according to the invention is a pull bar.
As shown in Figure 3, said pull bar specifically can comprise the first bar section 31 that is articulated in support 1 fixed end, and the second bar section, 32, the first bar sections 31 and the second bar section 32 that are articulated in basic arm 10 roots are hinged.
When amplitude oil cylinder 4 is regained fully, when promptly support 1 was stacked and placed on basic arm 10 tops, the above-mentioned first bar section 31 and the second bar section 32 be folding (state shown in Figure 3) mutually; When support 1 after hoisting under the effect of amplitude oil cylinder 4, the above-mentioned first bar section 31 and second bar section 32 tensioning gradually finally are straightened.Obviously, second take-up device 3 can also adopt a stay cord with suitable length, when support 1 hoisting under the effect of amplitude oil cylinder 4 put in place after, this stay cord is straightened just.
Said stay cord can be a steel rope, but obviously can not only be confined to steel rope, and the stay cord that is made by other material (such as high-strength high-modulus polyethylene fiber) with suitable intensity, suppleness also is fine.
When needing the lifting weight, the support 1 of above-mentioned super lifting device can rise on the basic arm 10 of self extending boom crane under the promotion of amplitude oil cylinder 4, and rotates in the luffing plane around its fixed end, and final support 1 can be perpendicular substantially with basic arm 10.Because first take-up device 2 applies first pulling force between the movable end of telescopic boom 20 and support 1, and this first pulling force can act on the moment of flexure on the telescopic arm support by weight equalizer, and therefore, the amount of deflection of principal arm is significantly less under the equal conditions; In like manner, second pulling force of second take-up device 3 will further alleviate the amount of deflection of support 1, and pulling force is conducted to the root of basic arm 10, also can improve the limit of above-mentioned first pulling force simultaneously.Therefore, the setting of said super lifting device can significantly improve the strained condition of principal arm, and then significantly promotes the performance figure such as the tonnage that hoists, operating altitude and amplitude of telescopic arm crane.
For further promote super lifting device provided by the present invention from the dismounting function, can do further to improve to aforementioned super lifting device.
See also Fig. 4, this figure is the integral structure scheme drawing of second kind of embodiment of super lifting device provided by the present invention.
As shown in Figure 4; Super lifting device provided by the present invention comprises two supports 1; Certain said amplitude oil cylinder, first take-up device and second take-up device also are respectively two (not shown)s, and above-mentioned parts are divided into two groups and be symmetricly set on the both sides of the basic arm 10 of telescopic boom hoisting crane, can guarantee in the lift heavy operation process; Act on the both sides that power on the telescopic boom can balancedly act on telescopic jib through support, to optimize the strained condition of telescopic boom.
Please in the lump referring to Fig. 5, this figure is the shaft side figure of looking up of super lifting device shown in Fig. 4.
As shown in Figure 5, between each support 1 and the basic arm 10 side is set all and opens oil cylinder 5.
When two supports 1 after hoisting vertically under the promotion of amplitude oil cylinder 4, can open under the promotion of oil cylinder 5 respectively to the suitable angle of two sideway swivels of basic arm 10 in side, also be that two stands 1 can be down " eight " font about aforementioned luffing plane symmetry substantially.
Along with the change that side is opened oil cylinder 5 elongations, the angle of support 1 sideway swivel outside basic arm 10 (being the angle on support 1 and luffing plane) also will change; The scope of this angle can be 0 degree to 45 degree, like this, two support 1 formed angular range are 0 to 90 degree.Certainly, support 1 angle that sideway swivel is bigger outside basic arm 10 also can realize.
Because two supports 1 all can be around its fixed end to the suitable angle of two sideway swivels of basic arm 10; Like this; Above-mentioned first pulling force exists to basic arm 10 left sides or component to the right; This component can save the shearing force of being born by balance respective direction upper arm, and therefore the transverse deflection of arm joint also can alleviate.
As previously mentioned, support 1 can amplitude oil cylinder promotion under in the luffing plane, rotate, can also under side is opened the promotion of oil cylinder 5, rotate simultaneously to the outside of basic arm 10; Therefore, support 1 can be hinged through two cardinal principles perpendicular rotating shaft and basic arm 10.
See also Fig. 6, this figure is the exploded view of second kind of super lifting device that embodiment provides.
As shown in Figure 6, this embodiment comprises that also two first are hingedly attached that 61 and two second of seats are hinged to attach 62; Said two first are hingedly attached the both sides that seat 61 is fixedly installed on said basic arm 10 respectively; Said two second hinged attach seat 62 respectively with two first hinged to attach seat 61 hinged; Said second hingedly attaches seat 62 and can hingedly attach seat 61 and in erectting the plane, rotate with respect to first; And the fixed end of said two supports 1 respectively with two second hinged to attach seat 62 hinged, said support 1 can hingedly attach seat 62 and rotates to the outside of said basic arm 10 with respect to second.Like this, support 1 and second hingedly attached seat 62 and together hingedly attaches seat 61 and rotate around first when amplitude oil cylinder 4 was stretched out or shunk, and support 1 hingedly attached seat 62 rotations around second when side was opened oil cylinder 5 and stretched out or shrinks.
Please refer to Fig. 7, Fig. 7 is the working state schematic representation with telescopic arm crane of super lifting device according to the invention.
Except above-mentioned super lifting device, the present invention also provides a kind of telescopic arm crane that comprises above-mentioned super lifting device, and the structure and the prior art of these other each several parts of telescopic arm crane are identical, do not repeat them here.
Particularly, above-mentioned telescopic arm crane can be wheeled telescopic arm crane.
Super lifting device according to the invention has from the dismounting function, and the process that specifically removes and installs is following:
One, with about two groups of parts (first hinged attach seat, second hingedly attach seat, support, first take-up device, second take-up device, amplitude oil cylinder, tensioning hydro-cylinder and elevator 21 etc.) distinguish combine and assemble and be in the same place;
Two, hoisting crane self arrives the integral hoisting of said super lifting device left-half on frame chassis two bearings in left side (71,72, as shown in Figure 8);
Three, with on two supports in super lifting device right half part integral hoisting to frame chassis right side;
Four, the midway location of two super lifting devices and slowly falling about crane arm goes to, when the anterior connecting bore of crane arm overlaps with the first hinged pin-and-hole that attaches seat, stop to fall arm and with about two hinged attach link together with crane arm respectively;
Five, operation elevator volume links to each other the cable wire end that is wound on the elevator with the hangers of the head both sides of minor details telescopic boom; Afterwards, the operation amplitude oil cylinder is overhanging, second hinged support with support around first hinged support turn to crane arm on the position of plane approximate vertical;
Six, the operation tensioning hydro-cylinder stretches out, and makes support hingedly attach the support that seat turns to both sides and roughly become 90 degree around second.In said process, it is stretching gradually that initial condition is the pull bar section of folded state, and the one of which end links to each other with the basic arm afterbody, the other end links to each other with the support movable end.So far, accomplish super lifting device according to the invention from installation process.It is understandable that the bearing (71 and 72) that is used for supporting bracket in the fitting process can utilize the existing bearing of existing car, also can be equipped with, support the failure-free basic demand as long as satisfy according to actual conditions.
Unloading process and above-mentioned steps are opposite.
The above only is a preferred implementation of the present invention; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; Can also make some improvement and retouching, these improvement and retouching also should be regarded as protection scope of the present invention.
Claims (7)
1. super lifting device is used for the telescopic boom hoisting crane, it is characterized in that, comprising:
Support, its fixed end is connected with the basic arm of telescopic boom hoisting crane;
First take-up device is arranged between the outer end of movable end and the arbitrary telescopic boom of said telescopic arm crane of said support;
Second take-up device is arranged between the root of movable end and said basic arm of said support; With
Amplitude oil cylinder is arranged between said support and the said basic arm; And the fixed end and the basic arm of said support are hinged, and the flexible of said amplitude oil cylinder makes said support swing in perpendicular around its fixed end;
Said support, amplitude oil cylinder, first take-up device and second take-up device are respectively two, and are divided into two groups and be symmetricly set on the both sides of the basic arm of telescopic boom hoisting crane;
Be equipped with side between two supports and the said basic arm and open oil cylinder, said side is opened the flexible of oil cylinder makes that said support all can be around its fixed end rolling to each side to said basic arm.
2. super lifting device according to claim 1 is characterized in that, the angular range of said support side oscillation outside said basic arm is 0 °～45 °.
3. super lifting device according to claim 2 is characterized in that, also comprises:
Two first hinged attaches seat, is fixedly installed on the both sides of said basic arm respectively; With
Two second hinged attaches seat, respectively with two first hinged to attach seat hinged, said second hingedly attaches seat and can hingedly attach seat and in erectting the plane, rotate with respect to first, and
The fixed end of said two supports respectively with two second hinged to attach seat hinged, said support can hingedly attach seat and rotates to the outside of said basic arm with respect to second.
4. according to the described super lifting device of arbitrary claim in the claim 1 to 3; It is characterized in that; Said first take-up device comprises elevator and is wound in the stay cord on this elevator; Wherein, the said elevator external part that is fixedly installed on the movable end of said support, said stay cord is captiveed joint with the outer end of arbitrary telescopic boom; Or the outer end that the external part of said stay cord is captiveed joint with the movable end of said support, said elevator is fixedly installed on arbitrary telescopic boom.
5. super lifting device according to claim 4; It is characterized in that; Said first take-up device also comprise tensioning hydro-cylinder and with the co-axially fixed ratchet of the reel of said elevator; Said tensioning hydro-cylinder is arranged between said ratchet and the elevator fixed parts, and said tensioning hydro-cylinder promotes the ratchet of said ratchet when stretching out, to strain said stay cord.
6. according to the described super lifting device of each claim of claim 1 to 3, it is characterized in that said second take-up device is a pull bar; Said pull bar comprises the first bar section that is articulated in said support movable end, and the second bar section that is articulated in said basic arm root, and the said first bar section and the second bar section are hinged.
7. the telescopic boom hoisting crane is characterized in that, comprises like the described super lifting device of each claim of claim 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101730218A CN101723260B (en) | 2008-10-29 | 2008-10-29 | Superlift device for telescopic boom and telescopic boom type crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101730218A CN101723260B (en) | 2008-10-29 | 2008-10-29 | Superlift device for telescopic boom and telescopic boom type crane |
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| Publication Number | Publication Date |
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| CN101723260A CN101723260A (en) | 2010-06-09 |
| CN101723260B true CN101723260B (en) | 2012-01-18 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101618840B (en) * | 2008-06-30 | 2010-12-22 | 徐州重型机械有限公司 | Telescopic crane and superlift device thereof |
| CN101857176B (en) * | 2010-07-05 | 2013-04-10 | 三一汽车起重机械有限公司 | Super hoisting device and telescopic-boom hoisting equipment with same |
| CN102126678B (en) * | 2010-12-31 | 2012-10-03 | 徐州重型机械有限公司 | Crane and super-lifting and tensioning control system and method thereof |
| CN102515039B (en) * | 2011-11-21 | 2014-01-15 | 三一汽车起重机械有限公司 | Crane and super-lifting device thereof |
| CN102491241A (en) * | 2011-12-19 | 2012-06-13 | 徐州重型机械有限公司 | Fixed arm disassembly device |
| CN107628548A (en) * | 2017-10-27 | 2018-01-26 | 三汽车起重机械有限公司 | Dismantle auxiliary mould, lifting telescopic arm disassembly system and method |
| CN113511600B (en) * | 2021-07-09 | 2023-07-25 | 浙江三一装备有限公司 | Super-lifting counterweight adjusting and connecting device and crane |
| CN113800449B (en) * | 2021-11-16 | 2022-02-08 | 四川明阳承起机械有限公司 | Automatic change big arm dismouting equipment of hoist |
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| CN101723260A (en) | 2010-06-09 |
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