CN103407908A - Crane and front tensioning system of super lifting device thereof - Google Patents
Crane and front tensioning system of super lifting device thereof Download PDFInfo
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- CN103407908A CN103407908A CN2013103864453A CN201310386445A CN103407908A CN 103407908 A CN103407908 A CN 103407908A CN 2013103864453 A CN2013103864453 A CN 2013103864453A CN 201310386445 A CN201310386445 A CN 201310386445A CN 103407908 A CN103407908 A CN 103407908A
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Abstract
The invention discloses a crane and a front tensioning system of a super lifting device of the crane. The front tensioning system of the super lifting device comprises a super lifting winch, a movable pulley, a pre-tightening oil cylinder, a super lifting front pull rope and a ratchet wheel locking mechanism, wherein the super lifting winch is arranged at a movable end of a super lifting arm; the movable pulley is connected with an arm head of a main arm of the crane; the pre-tightening oil cylinder is arranged on a super lifting arm; the super lifting front pull rope extends outside from the super lifting winch, gets round the movable pulley and is connected with the movable end of the pre-tightening oil cylinder; the ratchet wheel locking mechanism is used for locking the super lifting winch while being used for the action of the pre-tightening oil cylinder. The pre-tightening oil cylinder of the system is arranged on the super lifting arm, so that the motion stroke of the pre-tightening oil cylinder is greatly increased; after the super lifting front pull rope reaches the state that the super lifting front pull rope can not be rolled by the super lifting winch, the pre-tightening stroke of the super lifting front pull rope can be greatly improved due to the arrangement of the pre-tightening oil cylinder, so that the super lifting front pull rod has better pre-tightening effect, the super lifting device can share more load of a main arm, and the stress state of the main arm can be improved.
Description
Technical field
The present invention relates to technical field of engineering machinery, particularly relate to the front clamping system of a kind of hoisting crane and super lifting device thereof.
Background technology
In recent years, along with the enforcement of large-scale construction project, camp site to hoisting crane particularly the demand of hoister in large tonnage day by day increase.
The craning weight of same amount is to increasing future development, the front clamping system of super lifting device stay cord used is also more and more thicker, the predetermincd tension that need to apply is also increasing, traditional pass through ratchet that recycling tensioning hydro-cylinder after super lift winch mechanism scrolling steel rope promotes super lift winch to carry out the mode of pretension more and more undesirable, can't meet the requirement of the front required predetermincd tension of clamping system of super lifting device, seriously having restricted super lifting device should have the performance of performance, has affected the raising of hoisting crane lifting performance.
Please refer to Fig. 1, Fig. 1 is the super lifting device principle of work schematic diagram of hoisting crane.
When hoisting crane is worked under super lifting working condition, in order to reduce the distortion of principal arm 100,202 pairs of principal arms 100 of the front balancing device of super lifting device are applied with application force, and this application force surpass arm 201 transmission by super lifting device, and by back balance device 203 balances of super lifting device; Before super lifting device work, need to carry out stay cord before having surpassed of front balancing device 202 pre-tensionerly, so that principal arm 100 is in shape, give play to better lifting performance.
Please refer to Fig. 2, Fig. 2 is the structural representation of the front clamping system of super lifting device of hoisting crane in prior art.
As shown in Figure 2, described front clamping system comprises super lift winch 221, pre-locking oil cylinder 222, controls oil cylinder 223 and retracing spring 224; Wherein, super lift winch 221 comprise reel with the coaxial ratchet be connected of reel; Pre-locking oil cylinder 222 is fixed in a side of super lift winch 221, controls oil cylinder 223 and retracing spring 224 and all is located at the side that pre-locking oil cylinder 222 relies on super lift winch 221, and be connected between pre-locking oil cylinder 222 and super lift winch support.Control oil cylinder 223 and be provided with impeller-hub 222a, during normal condition, this impeller-hub 222a is placed between the ratchet 221a of ratchet.
Before being somebody's turn to do, the tensioning mode of clamping system is as follows:
Oil cylinder 223 is controlled in first operation, and its movable end is stretched out, and by pre-locking oil cylinder 222 jack-up, retracing spring 224 is stretched simultaneously, and after pre-locking oil cylinder 222 jack-up, impeller-hub 222a breaks away from ratchet 221a;
Stay cord before the reel scrolling that drives super lift winch 221 by HM Hydraulic Motor 225 has again surpassed, until roll up motionless, the pressure of release control oil cylinder 223 afterwards, controlling the movable end of oil cylinder 223 retracts, retracing spring 224 retractions retract pre-locking oil cylinder 222, and impeller-hub 222a is placed between ratchet 221a again;
The movable end of finally controlling pre-locking oil cylinder 222 stretches out, and by impeller-hub 222a, promotes the ratchet of super lift winch 221, makes it continue scrolling and has surpassed front stay cord, stay cord pretension before having surpassed.
Yet there is following technical matters in technique scheme:
Before having surpassed, stay cord is compliant member, stretch ratio is large, pre-locking oil cylinder 222 is located at a side of super lift winch 221, due to space constraint, the length of pre-locking oil cylinder 222 is shorter, movable stroke is limited, namely, when pre-locking oil cylinder 222 carries out pretension, driving impeller-hub 222a, to promote the angle that ratchet 221a rotates limited, causes easily that surpass front stay cord pretension effect undesirable, causes super lifting device can not fully share the load of principal arm 100, thereby make principal arm 100 have the potential safety hazard of folding arm, cause normal lift heavy performance on the low side.
Moreover, along with principal arm 100 is more and more longer, before having surpassed, the length of stay cord is also more and more longer, and diameter is increasing, if before still selecting above-mentioned front clamping system to surpass, the pretension of stay cord, need pre-locking oil cylinder 222 that certain length is arranged, so, can cause super lift winch 221 increasing, affect the integral layout of super lifting device.
In view of this, how to improve clamping system before super lifting device, make surpass of super lifting device before stay cord have better pretension effect, be the technical matterss that those skilled in the art at present need to be approaching.
Summary of the invention
The purpose of this invention is to provide the front clamping system of a kind of hoisting crane and super lifting device thereof, before before this super lifting device, clamping system can make having surpassed of super lifting device, stay cord had better pretension effect, thereby super lifting device can be shared the load of principal arm more, improve the strained condition of principal arm.
For solving the problems of the technologies described above, the invention provides a kind of front clamping system of super lifting device of hoisting crane, comprise and be located at the super lift winch that has surpassed the arm movable end, also comprise:
Movable pulley, be connected in the principal arm arm head of hoisting crane;
Pre-locking oil cylinder, be installed on and surpassed arm;
Stay cord before having surpassed, walk around described movable pulley after described super lift winch stretches out, be connected with the movable end of described pre-locking oil cylinder;
The ratchet lockable mechanism, during for described pretension cylinder action, locked described super lift winch.
Preferably, also comprise deflection sheave, be located at and surpassed the arm movable end, be positioned at the below of described super lift winch; Before described having surpassed, stay cord is walked around described movable pulley, described deflection sheave is connected with the movable end of described pre-locking oil cylinder; The flexible direction of described pre-locking oil cylinder movable end is consistent with the described length direction that has surpassed arm.
Preferably, described pre-locking oil cylinder is arranged at the described inside that has surpassed arm.
Preferably, the fixed end of described pre-locking oil cylinder is connected with the described fixed end that has surpassed arm.
Preferably, the movable end of described pre-locking oil cylinder is connected with the described movable end that has surpassed arm.
Preferably, described pre-locking oil cylinder is provided with the dynamometry device.
Preferably, the movable end of described pre-locking oil cylinder is provided with length meter spare.
Preferably, described ratchet lockable mechanism comprises locking component and locking oil cylinder; The fixed end of described locking oil cylinder is connected with the support of described super lift winch, and movable end is connected with described locking component, and described locking oil cylinder can drive described locking component and snaps in or deviate between the ratchet of described super lift winch.
Preferably, described ratchet lockable mechanism also comprises the locking controlling spring, is located between the support of described locking component and described super lift winch.
Before the present invention made having surpassed of super lifting device by structural development, stay cord had better pretension effect.Particularly, the pre-locking oil cylinder in this programme is installed on and has surpassed arm, at the principal arm arm head, is provided with movable pulley simultaneously, from super lift winch stretch out super front stay cord walk around movable pulley and be connected with the movable end of pre-locking oil cylinder, and be provided with the ratchet lockable mechanism, when the pretension cylinder action, can locked super lift winch.Because being installed on, pre-locking oil cylinder surpassed arm, with pre-locking oil cylinder in background technology, be located in super lift winch support and compare, the movement travel of pre-locking oil cylinder significantly increases, that is to say, after before super lift winch will surpass, stay cord scrolled to super lift winch and can not rotate again, the setting of this pre-locking oil cylinder can significantly improve the pretension stroke that has surpassed front stay cord, before making to have surpassed, stay cord has better pretension effect, more easily reach desirable Pre strained state, thereby super lifting device can be shared the load of principal arm more, improve the strained condition of principal arm.
And, pre-locking oil cylinder is arranged at and has surpassed arm, saved the inner space of super lift winch support, increased the Rong Shengliang of super lift winch, and in background technology, pre-locking oil cylinder is located in super lift winch support and is compared, dwindled the arrangement space of super lift winch.
In a preferred embodiment, described pre-locking oil cylinder is arranged at the described inside that has surpassed arm; So arrange, can effectively protect pre-locking oil cylinder, the telescopic process of pre-locking oil cylinder has stability preferably.
The present invention also provides a kind of hoisting crane, comprises the front clamping system of super lifting device, and before described super lifting device, clamping system is clamping system before the described super lifting device of above-mentioned any one.
Because clamping system before above-mentioned super lifting device has above-mentioned technique effect, the hoisting crane of the front clamping system of this super lifting device also has corresponding technique effect, repeats no more here so comprise.
The accompanying drawing explanation
Fig. 1 is the super lifting device principle of work schematic diagram of hoisting crane;
Fig. 2 is the structural representation of the front clamping system of super lifting device of hoisting crane in prior art;
Fig. 3 is the structural representation that before a kind of super lifting device provided by the present invention, clamping system is applied to hoisting crane;
Fig. 4 is the structural representation that before super lifting device, clamping system is located at super lifting device;
Fig. 5 is the partial enlarged drawing at A position in Fig. 4;
Fig. 6 is the structural representation of the ratchet lockable mechanism of clamping system before super lifting device.
In Fig. 1-2:
Principal arm 100, surpassed arm 201, front balancing device 202, and super lift winch 221, ratchet 221a, pre-locking oil cylinder 222, impeller-hub 222a, control oil cylinder 223, retracing spring 224, HM Hydraulic Motor 225, back balance device 203;
In Fig. 3-6:
Surpassed arm 41, stay cord 42 before having surpassed, amplitude oil cylinder 43, launch oil cylinder 44, back balance device 45, arm-tie 46;
The specific embodiment
Core of the present invention is to provide a kind of hoisting crane and the front clamping system of super lifting device thereof, before before this super lifting device, clamping system can make having surpassed of super lifting device, stay cord had better pretension effect, thereby super lifting device can be shared the load of principal arm more, improve the strained condition of principal arm.
In order to make those skilled in the art person understand better the present invention program, the present invention is described in further detail below in conjunction with the drawings and specific embodiments.For the ease of understanding and describing succinctly, hereinafter in conjunction with clamping system before hoisting crane and super lifting device thereof, to describe, beneficial effect no longer repeats to discuss.
Please refer to Fig. 3, Fig. 3 is the structural representation that before a kind of super lifting device provided by the present invention, clamping system is applied to hoisting crane.
The super lifting device of hoisting crane comprise surpassed arm 41, surpassed before stay cord 42, amplitude oil cylinder 43, launch oil cylinder 44(and be shown in Fig. 4) and back balance device 45; Wherein, surpassed arm 41 and be located at principal arm 30 both sides, and with basic arm 31 pivot joints of its fixed end and principal arm 30; Surpass arm 41 and realized turning round in the luffing plane by amplitude oil cylinder 43, can launch certain angle to principal arm 30 both sides by launching oil cylinder 44; Before having surpassed, stay cord 42 is located at the movable end that surpassed arm 41 and telescopic boom 32 heads of principal arm 30, for between the movable end that has surpassed arm 41 and telescopic boom 32 heads, forming pulling force, in order to share the load of principal arm 30, this pulling force transmits by having surpassed arm 41, and by back balance device 45 balances.Wherein, surpassed between front stay cord 42 and telescopic boom 32 heads and connected by arm-tie 46.
In this embodiment, before super lifting device, clamping system comprises:
Pre-locking oil cylinder 54, be installed on and surpassed arm 41;
Stay cord 42 before having surpassed, after from super lift winch 51, stretching out, walk around movable pulley 52 and be connected with the movable end of pre-locking oil cylinder 54;
The ratchet lockable mechanism, during for pre-locking oil cylinder 54 action, locked super lift winch 51.
Before hoisting crane work, first selected operating mode, will surpass lift winch 51 releases, make it be in not locking state, the telescopic boom 32 of principal arm 30 stretches out, stay cord 42 stretching out and stretch out with telescopic boom 32 before having surpassed, until telescopic boom 32 extend out to assigned address, now, before having surpassed, stay cord 42 is in quick condition; In order to make the better performance of super lifting device performance in working process, need to carry out tensioning to stay cord 42 before having surpassed.
Before this super lifting device, clamping system is as follows to the tensioning mode of stay cord 42 before having surpassed: first start super lift winch 51, scrolling has surpassed front stay cord 42, until super lift winch 51 can not rotate again.
Locked super lift winch 51, start pre-locking oil cylinder 54 again, and stay cord 42 pretensions before having surpassed by pre-locking oil cylinder 54, until before having surpassed, the value of thrust of stay cord 42 reaches setting value.
Wherein, super lift winch 51 is locked by the ratchet lockable mechanism.After before having surpassed, stay cord 42 reached the Pre strained state of setting by pre-locking oil cylinder 54, super lift winch 51 still was in locking state, had avoided super lift winch 51 counter-rotatings, had improved the lift heavy performance of safety performance and the principal arm 30 of super lifting device.
Obviously, hoisting crane is in the lift heavy process, and pre-locking oil cylinder 54 movable ends remain certain extension elongation, so that before having surpassed, stay cord 42 is in rational strained condition all the time.
Clamping system before this super lifting device, stay cord 42 is to scrolling again before super lift winch 51 scrollings have surpassed, before by pre-locking oil cylinder 54 direct pulls, having surpassed, stay cord 42 carries out further tensioning to it, this pre-locking oil cylinder 54 is installed on and has surpassed arm 41, with in background technology, be located at super lift winch support in compare, in this scheme, the movement travel of pre-locking oil cylinder 54 significantly increases, that is to say, after before super lift winch 51 will surpass, stay cord 42 scrolled to super lift winch 51 and can not rotate again, the setting of this pre-locking oil cylinder 54 can significantly improve the pretension stroke that has surpassed front stay cord 42, before making to have surpassed, stay cord 42 has better pretension effect, more easily reach desirable Pre strained state, thereby super lifting device can be shared the load of principal arm 30 more, improve the strained condition of principal arm 30, improve the lifting performance of hoisting crane.
In addition, in this scheme, pre-locking oil cylinder 54 is located at and has been surpassed arm 41, saved the inner space of super lift winch support, increased the Rong Shengliang of super lift winch 51, with in background technology, pre-locking oil cylinder is located to super lift winch internal stent and is compared, dwindle the arrangement space of super lift winch 51, made the structural arrangement of super lifting device compacter.
Please in the lump with reference to figure 4-5, Fig. 4 is the structural representation that before super lifting device, clamping system is located at super lifting device; Fig. 5 is the partial enlarged drawing at A position in Fig. 4.
Before aforementioned super lifting device, on the basis of clamping system, also comprise deflection sheave 53, be located at the movable end that has surpassed arm 54, be positioned at super lift winch 51 belows; After before having surpassed, stay cord 42 is walked around movable pulley 52, go back this deflection sheave 53 of pile warp, then be connected with the movable end of pre-locking oil cylinder 54; Under this kind mode, the flexible direction of pre-locking oil cylinder 54 movable ends is consistent with the length direction that has surpassed arm 41; So, be convenient to pre-locking oil cylinder 54 in the setting surpassed on arm 41.
Further, pre-locking oil cylinder 54 is arranged at the inside that has surpassed arm 41; So arrange, rationally utilized the inner space that has surpassed arm 41, and can effectively protect pre-locking oil cylinder 54, make it in telescopic process, have stability preferably; And, in background technology, pre-locking oil cylinder 54 is arranged to super lift winch internal stent, the set-up mode in this scheme can reduce the weight that has surpassed arm 41 movable ends, makes super lifting device integral body be in better strained condition, crane system is more stable, is conducive to improve car load lift heavy performance.
Particularly, the fixed end of pre-locking oil cylinder 54 is connected with the fixed end that has surpassed arm 41; That is to say, the movable end of pre-locking oil cylinder 54 is positioned at the movable end that surpass arm 41, so, during the retraction of the movable end of pre-locking oil cylinder 54, namely when having surpassed arm 41 fixed end directions and move, has surpassed front stay cord 42 and has been tensioned.
Certainly, it is also feasible that the fixed end of pre-locking oil cylinder 54 is connected with the movable end that has surpassed arm 41, and after so arranging, when the movable end of pre-locking oil cylinder 54 stretched out, namely when having surpassed arm 41 fixed end directions and move, before having surpassed, stay cord 42 was tensioned.
Further, pre-locking oil cylinder 54 is provided with dynamometry device 55, particularly, dynamometry device 55 can be located to the fixed end of pre-locking oil cylinder 54 and surpass between the fixed end of arm 41; When stay cord 42 carries out pretension to it before pre-locking oil cylinder 54 direct pulls have surpassed, by dynamometry device 55, measure the value of thrust that has surpassed front stay cord 42, if the value of thrust that dynamometry device 55 records reaches setting value, think that having surpassed front stay cord 42 reaches desirable Pre strained state, before namely having surpassed, stay cord 42 is near linear state, stop the action of pre-locking oil cylinder 54, and by pre-locking oil cylinder 54 at this position locking.
Above-mentioned setting value can be set according to actual conditions.
Particularly, described dynamometry device 55 can be pulling force sensor, certainly, the parts that other can dynamometry also can be set.
Further, the movable end of pre-locking oil cylinder 54 is provided with length meter spare; This length meter spare is for monitoring the lift heavy process, in whether pre-locking oil cylinder 54 occurs, let out, whether the extension elongation of its movable end changes, thereby can adjust in real time the extension elongation of pre-locking oil cylinder 54 movable ends, and before making to have surpassed, stay cord 42 is in rational strained condition all the time.
Except above-mentioned specific embodiment, also the fixed end of pre-locking oil cylinder can be connected with the movable end that has surpassed arm, now, after before having surpassed, stay cord is walked around movable pulley, directly with the movable end of pre-locking oil cylinder, be connected, that is to say, when craning weight of same, using the part of pre-locking oil cylinder stay cord before having surpassed.
On this basis, can on pre-locking oil cylinder, the dynamometry device be set equally, to measure in the tensioning process, the value of thrust of stay cord before having surpassed; Can length meter spare be set at the movable end of pre-locking oil cylinder equally, in monitoring lift heavy process, whether the stroke of pre-locking oil cylinder movable end changes.
Although before this scheme can make to have surpassed equally, stay cord was in desirable Pre strained state, because pre-locking oil cylinder is in vacant state, for guaranteeing safety and reliability, to compare with aforementioned schemes, in this scheme, the flexible stroke of pre-locking oil cylinder is less.In addition, the pre-unsettled setting of locking oil cylinder, also inconvenience is protected it, is difficult to guarantee its stability in the course of the work.So, comparatively speaking, the preferably plan of establishment of aforementioned pre-locking oil cylinder.
Please refer to Fig. 6, Fig. 6 is the structural representation of the ratchet lockable mechanism of clamping system before super lifting device.
As shown in the figure, the ratchet lockable mechanism comprises locking component 61 and locking oil cylinder 62; Wherein, the fixed end of locking oil cylinder 62 is connected with the support of super lift winch 51, and movable end is connected with locking component 61, and locking oil cylinder 62 can drive locking component 62 and snaps in or deviate between the ratchet 51a of super lift winch 51.
The principle of work of described ratchet lockable mechanism is as follows: under normality, super lift winch 51 is in locking state, when stay cord 42 stretches out before needs have surpassed, to surpass lift winch 51 releases, particularly, control locking oil cylinder 62, its movable end is retracted, drive locking component 61 and deviate between the ratchet 51a of super lift winch 51, super lift winch 51 can scrolling, is in not locking state; When not needing super lift winch 51 scrollings, while as stay cord 42 before having surpassed by 54 pairs of pre-locking oil cylinders, carrying out pretension, or hoisting crane is in the lift heavy process, for preventing super lift winch 51 counter-rotatings, will surpass lift winch 51 locked, particularly, control locking oil cylinder 62, its movable end is stretched out, drive locking component 61 and snap between the ratchet 51a of super lift winch 51, thereby super lift winch 51 is by locked.
Further, the ratchet lockable mechanism also comprises locking controlling spring 63, be arranged between the support and locking component 61 of super lift winch 51, when the movable end of locking oil cylinder 62 is retracted, driving locking component 61 moves towards the direction away from super lift winch 51, compress simultaneously locking controlling spring 63, when the pressure of locking oil cylinder 62 is released, when its movable end stretches out, locking controlling spring 63 is by the compressive state resilience, can assist 62 actions of locking oil cylinder, fast locking component 61 be pushed between the ratchet 51a of super lift winch 51 to locked super lift winch 51.
Here it is pointed out that before super lifting device in above-described embodiment in clamping system that the number of movable pulley 52 can be set to one, also can be set to a plurality ofly, so, the wiring multiplying power that surpass front stay cord 42 is many multiplying powers, can reduce to have surpassed the diameter of front stay cord 42.
Above clamping system before a kind of hoisting crane provided by the present invention and super lifting device thereof all is described in detail.Applied specific case herein principle of the present invention and embodiment are set forth, the explanation of above embodiment is just be used to helping to understand method of the present invention and core concept thereof.It should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention, can also carry out some improvement and modification to the present invention, these improvement and modification also fall in the protection domain of the claims in the present invention.
Claims (10)
1. clamping system before the super lifting device of a hoisting crane, comprise and be located at the super lift winch that has surpassed the arm movable end, it is characterized in that, also comprises:
Movable pulley, be connected in the principal arm arm head of hoisting crane;
Pre-locking oil cylinder, be installed on and surpassed arm;
Stay cord before having surpassed, walk around described movable pulley after described super lift winch stretches out, be connected with the movable end of described pre-locking oil cylinder;
The ratchet lockable mechanism, during for described pretension cylinder action, locked described super lift winch.
2. clamping system before super lifting device as claimed in claim 1, is characterized in that, also comprises deflection sheave, is located at and surpassed the arm movable end, is positioned at the below of described super lift winch; Before described having surpassed, stay cord is walked around described movable pulley, described deflection sheave is connected with the movable end of described pre-locking oil cylinder; The flexible direction of described pre-locking oil cylinder movable end is consistent with the described length direction that has surpassed arm.
3. clamping system before super lifting device as claimed in claim 2, is characterized in that, described pre-locking oil cylinder is arranged at the described inside that has surpassed arm.
4. clamping system before super lifting device as claimed in claim 3, is characterized in that, the fixed end of described pre-locking oil cylinder is connected with the described fixed end that has surpassed arm.
5. clamping system before super lifting device as claimed in claim 1, is characterized in that, the fixed end of described pre-locking oil cylinder is connected with the described movable end that has surpassed arm.
6. clamping system before super lifting device as described as claim 1 to 5 any one, is characterized in that, described pre-locking oil cylinder is provided with the dynamometry device.
7. clamping system before super lifting device as described as claim 1 to 5 any one, is characterized in that, the movable end of described pre-locking oil cylinder is provided with length meter spare.
8. clamping system before super lifting device as claimed in claim 1, is characterized in that, described ratchet lockable mechanism comprises locking component and locking oil cylinder; The fixed end of described locking oil cylinder is connected with the support of described super lift winch, and movable end is connected with described locking component, and described locking oil cylinder can drive described locking component and snaps in or deviate between the ratchet of described super lift winch.
9. clamping system before super lifting device as claimed in claim 8, is characterized in that, described ratchet lockable mechanism also comprises the locking controlling spring, is located between the support of described locking component and described super lift winch.
10. a hoisting crane, comprise the front clamping system of super lifting device, it is characterized in that, before described super lifting device, clamping system is clamping system before super lifting device as described as claim 1 to 9 any one.
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| CN2013103864453A CN103407908A (en) | 2013-08-29 | 2013-08-29 | Crane and front tensioning system of super lifting device thereof |
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| CN103613008A (en) * | 2013-12-18 | 2014-03-05 | 三一汽车起重机械有限公司 | Superlift pre-tightening device and crane |
| CN103641000A (en) * | 2013-12-17 | 2014-03-19 | 徐州重型机械有限公司 | Crane and super-lifting device thereof |
| CN103693570A (en) * | 2013-12-12 | 2014-04-02 | 中联重科股份有限公司 | Super-lift device, crane and control method thereof |
| CN103738862A (en) * | 2013-12-31 | 2014-04-23 | 三一汽车起重机械有限公司 | Super-lift pre-tightening method and device of crane |
| CN104401888A (en) * | 2014-10-30 | 2015-03-11 | 三一汽车起重机械有限公司 | Super lift apparatus and crane |
| CN106115516A (en) * | 2016-08-31 | 2016-11-16 | 太原重型机械集团工程技术研发有限公司 | Crane, super lifting device and pretension steel wire rope control method thereof and system |
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| CN113401818A (en) * | 2021-07-30 | 2021-09-17 | 湖南三一中型起重机械有限公司 | Super-lifting pulley bracket device, arm support and crane |
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| CN103693570A (en) * | 2013-12-12 | 2014-04-02 | 中联重科股份有限公司 | Super-lift device, crane and control method thereof |
| CN103693570B (en) * | 2013-12-12 | 2016-03-23 | 中联重科股份有限公司 | Super-lift device, crane and control method thereof |
| CN103641000A (en) * | 2013-12-17 | 2014-03-19 | 徐州重型机械有限公司 | Crane and super-lifting device thereof |
| CN103613008B (en) * | 2013-12-18 | 2015-10-28 | 三一汽车起重机械有限公司 | Pre-tightening apparatus and hoisting crane are surpassed |
| CN103613008A (en) * | 2013-12-18 | 2014-03-05 | 三一汽车起重机械有限公司 | Superlift pre-tightening device and crane |
| CN103738862B (en) * | 2013-12-31 | 2016-01-20 | 三一汽车起重机械有限公司 | Crane super lifting pre-tension method and device |
| CN103738862A (en) * | 2013-12-31 | 2014-04-23 | 三一汽车起重机械有限公司 | Super-lift pre-tightening method and device of crane |
| CN104401888A (en) * | 2014-10-30 | 2015-03-11 | 三一汽车起重机械有限公司 | Super lift apparatus and crane |
| CN106115516A (en) * | 2016-08-31 | 2016-11-16 | 太原重型机械集团工程技术研发有限公司 | Crane, super lifting device and pretension steel wire rope control method thereof and system |
| CN106115516B (en) * | 2016-08-31 | 2018-01-12 | 太原重型机械集团工程技术研发有限公司 | Crane, super lifting device and its pretension steel wire rope control method and system |
| CN112456349A (en) * | 2020-11-26 | 2021-03-09 | 三一汽车起重机械有限公司 | Crane |
| CN113401818A (en) * | 2021-07-30 | 2021-09-17 | 湖南三一中型起重机械有限公司 | Super-lifting pulley bracket device, arm support and crane |
| WO2023005564A1 (en) * | 2021-07-30 | 2023-02-02 | 湖南三一中型起重机械有限公司 | Super-lift pulley bracket device, arm support and crane |
| CN115744683A (en) * | 2022-11-30 | 2023-03-07 | 菲尔森智能装备(江苏)有限公司 | Reinforced suspension arm of crane |
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