CN105084226A - Front tensioning mechanism, super-lift device with front tensioning mechanism and crane - Google Patents
Front tensioning mechanism, super-lift device with front tensioning mechanism and crane Download PDFInfo
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- CN105084226A CN105084226A CN201410218783.0A CN201410218783A CN105084226A CN 105084226 A CN105084226 A CN 105084226A CN 201410218783 A CN201410218783 A CN 201410218783A CN 105084226 A CN105084226 A CN 105084226A
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/62—Constructional features or details
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/62—Constructional features or details
- B66C23/72—Counterweights or supports for balancing lifting couples
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Abstract
The invention provides a front tensioning mechanism, a super-lift device with the front tensioning mechanism and a crane. Preceding straining device is applied to telescopic boom crane, and preceding straining device includes: the first end of the mast is a boom connecting end, and the second end of the mast is a free end; the winch is arranged on the mast; the first end of the oblique tensioning mechanism is connected to the free end of the mast, and the second end of the oblique tensioning mechanism is a cargo boom tensioning end; the connecting lines among the boom connecting end of the mast, the free end of the mast and the boom tensioning end of the diagonal tensioning mechanism form a triangle; the winch is positioned between the boom connecting end of the mast and the first end of the diagonal tension mechanism; at least one part of the oblique tensioning mechanism is an N multiplying power pulley block, wherein N is a natural number which is more than or equal to 2, and the front tensioning rope is connected with the winch after being wound by the N multiplying power pulley block. The invention can achieve the preset pretightening force by one-time pretightening action and adjust the pretightening force according to different working conditions.
Description
Technical field
The present invention relates to construction machinery and equipment, in particular to a kind of front tensioner mechanism, the super lifting device with this front tensioner mechanism and hoisting crane.
Background technology
Telescopic crane is with its flexible operation, with to hanging, with the advantage of hanging with walking, being widely used in engineer operation.Along with the large scale development of construction project, the property indices for Telescopic crane there has also been higher requirement, such as: lifting tonnage, operating altitude and amplitude etc.And along with the raising of the performance figure such as lifting tonnage, operating altitude and amplitude, brachium and the deadweight of crane arm can be increasing, at present on goliath, the weight of crane arm often accounts for more than 23% of complete machine weight.
Because crane arm is more and more longer, lift heavy is more and more heavier, operating mode is more and more severe, lift heavy is also increasing gradually perpendicular to crane arm component in downward direction, make crane arm all larger in the amount of deflection (i.e. the vertical amount of deflection of jib and transverse deflection) of luffing plane and plane of rotation, in order to avoid deflection of arm support is excessive, must control gross load; Like this, the total arm length of hoisting crane, lifting altitude and maximum liter weight all receive serious restriction.
For alleviating amount of deflection and the stressed problem of amplitude oil cylinder, generally super lifting device can be set on the crane arm of hoister in large tonnage, to improve the strained condition of crane arm, improve hoisting capacity and the load-carrying capacity of hoisting crane.In conjunction with see Fig. 1, for existing a kind of super lifting device schematic diagram be applied on Telescopic crane, this super lifting device comprises mast 2 ', ratchet elevator 3 ', pre-tightening mechanism 7 ', front tensioned lines 4 ' and rear tensioned lines 8 ', its middle mast 2 ' is arranged on crane arm 1 ', ratchet elevator 3 ' is arranged on the free end of mast 2 ', pre-tightening mechanism 7 ' is arranged on mast 2 ' and goes up and be positioned at ratchet elevator 3 ' below, pre-tightening mechanism 7 ' comprises pre-locking oil cylinder, front tensioned lines 4 ' one end is connected on ratchet elevator 3 ', the other end is connected on the arm head 13 ' of crane arm 1 ', rear tensioned lines 8 ' one end is connected on mast 2 ', the other end is connected to the arm root place of crane arm 1 '.
In operation, first super lifting device needs to carry out pretension by pre-tightening mechanism 7 ' and ratchet elevator 3 ' to front tensioned lines 4 ', due to the predetermincd tension comparatively large (being generally more than 7t) that front tensioned lines 4 ' is preset, and the motor of driving pawl elevator 3 ' does not have enough output torques, so, pretension process is divided into two steps: first rotating ratchet elevator 3 ', by exceptionally straight for front tensioned lines 4 ', completes first time pretension; Then pre-tightening mechanism 7 ' is after once completing the action such as lock-off, low water, and pre-locking oil cylinder stretches out and falls into the teeth groove of ratchet elevator 3 ', and driving pawl elevator 3 ' is rotated further, and tightens front tensioned lines 4 ', until reach default predetermincd tension, completes second time pretension.After front tensioned lines 4 ' completes pretension, the front tensioned lines 4 ' of super lifting device, surpass between mast 2 ', rear tensioned lines 8 ' and crane arm 1 ' and formed stable ditrigon geometric relationship.
But before in existing super lifting device there is following problem in the firmly beforehand means of tensioned lines 4 ':
1, the predetermincd tension preset of front tensioned lines 4 ' is comparatively large, and ratchet elevator 3 ' output torque not therefore cannot complete separately, needs to arrange pre-tightening mechanism 7 ' specially and completes secondary pretension, add the production time of super lifting device, reduce the operating efficiency of hoisting crane.
2, pre-tightening mechanism 7 ' structure is comparatively complicated, after sequentially need completing the action such as lock-off, low water of pre-locking oil cylinder during operation, pre-locking oil cylinder could be stretched driving pawl elevator 3 ' to be rotated further, control process is comparatively complicated, adds the complexity of super lifting device operation.
3, crane arm 1 ' has the different work elevations angle, and the predetermincd tension size of required front tensioned lines 4 ' is also different.And the stroke that stretches out of pre-locking oil cylinder is fixing in prior art, so the predetermincd tension of fixed size can only be provided, therefore, front tensioned lines 4 ' can not meet hoisting crane different requirements to predetermincd tension under different work operating mode.
Summary of the invention
The present invention aims to provide a kind of front tensioner mechanism, the super lifting device with this front tensioner mechanism and hoisting crane, can just reach default predetermincd tension by a pretension action, and can according to different work Operating condition adjustment predetermincd tension size.
To achieve these goals, according to an aspect of the present invention, a kind of front tensioner mechanism is provided, front tensioner mechanism is applied to Telescopic crane, front tensioner mechanism comprises: mast, and the first end of mast is crane arm coupling end, and the second end of mast is free end; Elevator, elevator is arranged on mast; And oblique tensioner mechanism, the first end of oblique tensioner mechanism is connected on the free end of mast, and the second end of oblique tensioner mechanism is crane arm pull side; Line between the crane arm pull side of the crane arm coupling end of mast, the free end of mast and oblique tensioner mechanism forms triangle; Elevator is between the crane arm coupling end and the first end of oblique tensioner mechanism of mast; In oblique tensioner mechanism is N multiplying power assembly pulley at least partially, wherein N be more than or equal to 2 natural number, be connected with elevator after front tensioned lines pile warp N multiplying power assembly pulley.
Further, N multiplying power assembly pulley has movable end and is fixed on the fixed end on the free end of mast, and fixed end is as the first end of oblique tensioner mechanism; Oblique tensioner mechanism also comprises connecting portion, and the first end of connecting portion is connected with the movable end of N multiplying power assembly pulley, and the second end of connecting portion is as crane arm pull side; The first end of front tensioned lines is fixed on mast, and the second end is connected on elevator after pile warp movable end, fixed end successively.
Further, N multiplying power assembly pulley comprises running block, running block as free end, the second end of front tensioned lines successively pile warp running block and fixed end to form N multiplying power, wherein N be more than or equal to 2 natural number.
Further, N multiplying power assembly pulley also comprises fixed pulley group, fixed pulley group as fixed end, the fixed pulley in fixed pulley group and the movable pulley one_to_one corresponding in running block.
Further, connecting portion comprises arm-tie, the first end of arm-tie and the movable end of N multiplying power assembly pulley hinged, the second end of arm-tie has hinge hole as crane arm pull side.
Further, connecting portion comprises connection cord, and the first end of connection cord is connected with movable end, and the second end of connection cord is as crane arm pull side.
Further, elevator is arranged on the middle part of mast.
Further, elevator has along the first circumferencial direction rotation with the first mode of operation straining front tensioned lines, and rotate the second mode of operation to unclamp front tensioned lines along the second circumferencial direction contrary with the first circumferencial direction, the predetermincd tension of front tensioner mechanism adjusts with the variation in angular displacement of elevator.
According to a further aspect in the invention, provide a kind of super lifting device, comprise front tensioner mechanism, front tensioner mechanism is aforesaid front tensioner mechanism.
According to a further aspect in the invention, provide a kind of hoisting crane, comprise: crane arm, crane arm comprises basic arm joint, telescopic boom joint and arm head, telescopic boom joint is arranged on basic arm joint along the length direction of basic arm joint movingly, and arm head is arranged on the end away from basic arm joint of telescopic boom joint; And super lifting device, super lifting device is arranged on crane arm; Super lifting device is aforesaid super lifting device, and mast is arranged on basic arm joint, and the crane arm pull side of oblique tensioner mechanism is connected to the end of the close arm head of arm head or telescopic boom joint.
Apply technical scheme of the present invention, mast in front tensioner mechanism is arranged on crane arm, the free end of mast is connected with the fixed end of N multiplying power assembly pulley, the movable end of N multiplying power assembly pulley is connected with connecting portion, connecting portion is connected with crane arm, and the line between the junction of connecting portion and crane arm and the two ends of mast defines stable triangle, namely linked together by N multiplying power assembly pulley between the free end of mast and crane arm, front tensioned lines is fixed on mast after the fixed end of pile warp N multiplying power assembly pulley and movable end successively after the elevator rope stretching mast, utilize many multiplying powers effect of N multiplying power assembly pulley, decrease the bearing capacity of the single rope body of front tensioned lines, if the predetermined predetermincd tension of front tensioned lines is F, the multiplying power of N multiplying power assembly pulley be adjusted to N (N be more than or equal to 2 natural number), then the stressed of single rope body of front tensioned lines is F/N, the output torque of elevator is enable to have reached the requirement of pretension, can the pretension of tensioned lines before complete independently, thus realize the object that namely pretension reaches setting predetermincd tension, simplify pretensioning operation, improve the operating efficiency of super lifting device, meanwhile, the angular displacement that can rotate by controlling elevator adjusts predetermincd tension size, and meet hoisting crane different requirements to predetermincd tension under different work operating mode, comformability is stronger.
Accompanying drawing explanation
The Figure of description forming a application's part 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 shows the schematic diagram be arranged on according to the super lifting device of prior art on crane arm;
Fig. 2 shows the schematic diagram of the pretension hydraulic oil cylinder driving ratchet elevator according to prior art;
Fig. 3 shows tensioner mechanism according to an embodiment of the invention and is arranged on the schematic diagram on crane arm;
Fig. 4 shows the wiring schematic diagram of tensioned lines on N multiplying power assembly pulley according to an embodiment of the invention; And
Fig. 5 shows super lifting device according to an embodiment of the invention and is arranged on schematic diagram on crane arm.
Description of reference numerals:
1 ', crane arm; 13 ', arm head; 2 ', mast; 3 ', ratchet elevator; 4 ', front tensioned lines; 7 ', pre-tightening mechanism; 8 ', rear tensioned lines; 1, crane arm; 11, basic arm joint; 12, telescopic boom joint; 13, arm head; 2, mast; 21, crane arm coupling end; 22, free end; 3, elevator; 31, ratchet; 4, front tensioned lines; 5, N multiplying power assembly pulley; 51, running block; 511, movable pulley; 52, fixed pulley group; 521, fixed pulley; 53, moving pulley bracket; 54, fixed pulley support; 6, arm-tie; 8, rear tensioned lines.
Detailed description of the invention
Below with reference to the accompanying drawings and describe the present invention in detail in conjunction with the embodiments.It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.
As shown in Figure 3, according to embodiments of the invention, provide a kind of front tensioner mechanism, preferably, front tensioner mechanism is applied on Telescopic crane.This front tensioner mechanism comprises mast 2, elevator 3 and tiltedly tensioner mechanism, its middle mast 2 is for having the rod-like structure of enough Rigidity and strengths, the first end of mast 2 is as crane arm coupling end 21, for being connected with crane arm 1, second end of mast 2 is as free end 22, the first end of oblique tensioner mechanism is connected on the free end 22 of mast 2, second end of oblique tensioner mechanism is as crane arm pull side, for being connected with crane arm 1 and providing pulling force for crane arm 1, when lift heavy operation, oblique tensioner mechanism is used for forming pulling force between the free end 22 and the end of crane arm of mast 2.Elevator 3 to be arranged on mast 2 and between the first end and the crane arm coupling end 21 of mast 2 of oblique tensioner mechanism, oblique tensioner mechanism be N multiplying power assembly pulley 5 at least partially, wherein N be more than or equal to 2 natural number, be generally the even number multiplying powers such as 2 multiplying powers, 4 multiplying powers, 6 multiplying powers, 8 multiplying powers, be connected with elevator 3 after front tensioned lines 4 pile warp N multiplying power assembly pulley 5.Due to the existence of N multiplying power assembly pulley 5, the tensile force that before supposing, tensioner mechanism is predetermined is F, the multiplying power of N multiplying power assembly pulley 5 is N, the power that then the single rope body of front tensioned lines 4 bears is F/N, the requirement front stretching device being provided to predetermincd tension can be reduced at double, namely many multiplying powers effect of N multiplying power assembly pulley 5 is utilized, the output torque of independent dependence elevator 3 just can meet the tensioning requirement of front stretching device, pretension work is completed separately by elevator 3, save the pre-tightening mechanism 7 ' of the prior art shown in Fig. 1 and Fig. 2, simplify firmly beforehand means, improve the operating efficiency of super lifting device; Meanwhile, the angular displacement that can rotate by controlling elevator 3 adjusts predetermincd tension size, meets hoisting crane different requirements to predetermincd tension under different work operating mode; Again in conjunction with the crane arm coupling end 21 of mast 2, the free end 22 of mast 2 and oblique tensioner mechanism crane arm pull side between line form triangle, after tensioning work is completed, mast 2, crane arm 1 and tiltedly form stable triangle between tensioner mechanism, improve stability and the safety of crane arm 1.
Preferably, N multiplying power assembly pulley 5 has movable end and fixed end, and tiltedly tensioner mechanism also comprises connecting portion.Wherein the fixed end of N multiplying power assembly pulley 5 is arranged on the free end 22 of mast 2 as the first end of oblique tensioner mechanism regularly, movable end can move relative to fixed end, the first end of front tensioned lines 4 is fixed on mast 2, the movable end of the second end of front tensioned lines 4 pile warp N multiplying power assembly pulley 5 is successively connected with elevator 3 with after fixed end, the different baudriers of front tensioned lines 4 on N multiplying power assembly pulley 5 define different multiplying powers, namely define aforesaid multiplying power N.The value of N will be mated according to the output torque of elevator 3 and the predetermined tensile force size F of front tensioner mechanism.Connecting portion is as the connection structure between N multiplying power assembly pulley 5 and crane arm 1, the first end of connecting portion is connected with the movable end of N multiplying power assembly pulley 5, second end of connecting portion for connecting crane arm 1, and provides pulling force for crane arm 1 as the crane arm pull side of oblique tensioner mechanism.
Certainly, N multiplying power assembly pulley 5 and connecting portion also have other set-up mode, such as the fixed end of N multiplying power assembly pulley 5 is connected with crane arm 1, fixed end is as crane arm pull side, between the movable end that connecting portion is connected to N multiplying power assembly pulley 5 and the free end 22 of mast 2, the first end of connecting portion in the end of free end 22 as oblique tensioner mechanism; Or the two ends of N multiplying power assembly pulley 5 are connected to connecting portion, two connecting portions are connected with mast 2 and crane arm 1 again respectively, can play the object of the single rope body bearing capacity of tensioned lines 4 before reducing equally.Here before reducing, the stressed main dependence of tensioned lines 4 unmarried rope body is movable part, and before fixed part just plays and changes, tensioned lines 4 walks on the rope the object in direction.
In conjunction with see figure preferably, the movable end of N multiplying power assembly pulley 5 is running block 51, running block 51 comprises n1 movable pulley 511, wherein n1 be greater than 1 natural number, all movable pulleys 511 are all articulated on moving pulley bracket 53, and the second end of front tensioned lines 4 can form required N multiplying power after pile warp running block 51 and fixed end successively.Running block 51 effectively can reduce the friction to front tensioned lines 4, the wearing and tearing of tensioned lines 4 before reducing.
Preferably, the fixed end of N multiplying power assembly pulley 5 is fixed pulley group 52, fixed pulley group 52 comprises n2 fixed pulley 521, wherein n2=n1, and the fixed pulley 521 in fixed pulley group 52 is arranged with movable pulley 511 one_to_one corresponding in running block 51, all fixed pulleys 521 are all articulated on fixed pulley support 54, and the second end of front tensioned lines 4 can form required N multiplying power after pile warp running block 51 and fixed pulley group 52 successively.
Preferred baudrier for: front tensioned lines 4 is introduced from first fixed pulley 521 from left to right of the fixed pulley group 52 shown in Fig. 4, after walking around first movable pulley 511 from left to right of running block 51, introduce second fixed pulley 521 from left to right of fixed pulley group 52 again, then second movable pulley 511 from left to right of running block 51 is walked around, and by that analogy, front tensioned lines 4 back and forth can be wound around between fixed pulley group 52 and running block 51, current tensioned lines 4 is fixed in fixed pulley group 52 by fag end after walking around last movable pulley 511 from left to right of running block 51.According to this baudrier, the multiplying power of N multiplying power assembly pulley 5 is N.
Preferably, connecting portion is arm-tie 6, when the fixed end of N multiplying power assembly pulley 5 is connected to free end 22 of mast 2, the first end of arm-tie 6 and the movable end of N multiplying power assembly pulley 5 hinged, second end of arm-tie 6 has hinge hole as crane arm pull side, for hinged with crane arm 1, can guarantee that the movable end of N multiplying power assembly pulley 5 can move relative to fixed end.
Or, connecting portion also can be connection cord, when the fixed end of N multiplying power assembly pulley 5 is connected to free end 22 of mast 2, the first end of connection cord is connected with the movable end of N multiplying power assembly pulley 5, second end of connection cord is used for being connected with crane arm 1 as crane arm pull side, and provides pulling force for crane arm 1.Described connection cord can be steel rope, but obviously only can not be confined to steel rope, has suitable intensity, connection cord that the material (such as high-strength high-modulus polyethylene fiber) of suppleness is obtained is also fine by other.
Or connecting portion also can be rope row.
Preferably, elevator 3 is arranged on the middle part of mast 2, can make the stressed more balanced, stable of front tensioner mechanism.
Certainly, elevator 3 also can be arranged near the free end 22 of mast 2 or crane arm coupling end 21, as long as between the first end and the crane arm coupling end 21 of mast 2 of oblique tensioner mechanism, particular location should be determined according to actual conditions.
The structure of elevator 3 can be ratchet elevator, and the baffle plate being namely positioned at reel two ends is ratchet 31, also can be common elevator 3, not affect the pretension of front stretching device.
The principle of work of front tensioner mechanism is illustrated below in conjunction with preferred embodiment mode:
1, cinching process.Rotate elevator 3 along the first circumferencial direction (direction of arrow see the elevator 3 in Fig. 3 illustrates), front tensioned lines 4 to rope closing on elevator 3, and is strained gradually; The predetermincd tension that before supposing, stretching device is predetermined is the multiplying power of F, N multiplying power assembly pulley 5 is N, then the power that before, the single rope body of tensioned lines 4 bears is F/N, and elevator 3 rotates separately just can meet predetermincd tension needs, completes the pretension operation of front stretching device.After pretension operation completes, mast 2, crane arm 1 and oblique tensioner mechanism define stable triangle.
2, adjustment process.Predetermincd tension needed for actual condition, elevator 3 is rotated along the first circumferencial direction or the second circumferencial direction contrary with the first circumferencial direction, controlling the angular transposition of elevator 3 regulates oblique tensioner mechanism to be supplied to the predetermincd tension of crane arm 1, thus can meet different requirements to predetermincd tension according to the different work operating mode of hoisting crane.
Namely, if cinching process terminates rear discovery along with hoisting crane working conditions change, when the predetermincd tension that front tensioner mechanism provides is less than predetermincd tension required under this operating mode, elevator 3 is rotated along the first circumferencial direction, front tensioned lines 4 is strained further, the predetermincd tension that front tensioner mechanism provides increases, and the predetermincd tension size of front tensioner mechanism is regulated by the angular transposition changing elevator 3; If along with working conditions change, when the predetermincd tension that front tensioner mechanism provides is greater than predetermincd tension required under this operating mode, elevator 3 is rotated along the second circumferencial direction, front tensioned lines 4 is unclamped a little, the predetermincd tension that front tensioner mechanism provides reduces, and the predetermincd tension size of front tensioner mechanism is regulated by the angular transposition changing elevator 3.
The predetermincd tension size of front tensioner mechanism regulates along with the variation in angular displacement of elevator 3, and the concrete mathematical relation wherein between the predetermincd tension size of tensioner mechanism and the angular transposition of elevator 3 belongs to prior art, does not repeat them here.
3, release process.Rotate elevator 3 along the second circumferencial direction, until front tensioned lines 4 is thoroughly unclamped, remove the pulling force to crane arm 1.
In conjunction with see Fig. 4, present invention also offers a kind of super lifting device, comprise front tensioner mechanism and rear tensioner mechanism, this front tensioner mechanism is aforesaid front tensioner mechanism, rear tensioner mechanism comprises rear tensioned lines 8, rear tensioned lines 8 first end is connected on the free end 22 of mast 2, and the second end is used for being connected with the arm root of crane arm 1.Under tensioning state, mast 2, tiltedly tensioner mechanism, crane arm 1 and rear tensioned lines 8 form the geometric relationship of ditrigon.
Present invention also offers a kind of hoisting crane, comprise crane arm 1 and super lifting device, wherein crane arm 1 comprises basic arm joint 11, telescopic boom joint 12 and arm head 13, here basic arm joint refers to that first of being hinged with the upper frame part of Telescopic crane saves arm, telescopic boom joint 12 can move along the length direction of crane arm 1, to stretch out crane arm 1 or retraction crane arm 1, telescopic boom joint 12 can be one or more, and arm head 13 is arranged on the end away from basic arm joint 11 of telescopic boom joint 12; Super lifting device is aforesaid super lifting device, the crane arm coupling end 21 of mast 2 is connected on basic arm joint 11, free end 22 extends along the direction away from basic arm joint 11, the crane arm pull side of oblique tensioner mechanism is connected on arm head 13, or be connected to the end of the close arm head 13 of telescopic boom joint 12, the second end of rear tensioned lines 8 is connected to the root of basic arm joint.Because oblique tensioner mechanism applies the first pulling force between crane arm 1 and the free end 22 of mast 2, and this first pulling force can act on moment of flexure on crane arm 1 by weight equalizer, and therefore, under equal conditions, the amount of deflection of crane arm 1 significantly reduces.In like manner, the second pulling force that rear tensioned lines 8 provides will alleviate the amount of deflection of mast 2 further, and the second pulling force is conducted to the root of basic arm joint 11, also can improve the limit of above-mentioned first pulling force simultaneously.Therefore, super lifting device significantly can improve the strained condition of crane arm 1, and then significantly promotes the performance figure such as the tonnage that hoists of Telescopic crane, operating altitude and amplitude.
Preferably, super lifting device has two, and the Width along crane arm 1 is arranged symmetrically in the both sides of crane arm 1, can ensure in lift heavy operation process, the power acted on crane arm 1 by mast 2 balancedly can act on the both sides of crane arm 1, to optimize the strained condition of crane arm 1.
As can be seen from the above description, the above embodiments of the present invention achieve following technique effect:
1, the disposable pretension process completing front stretching device of elevator, simplifies firmly beforehand means, reduces pretension production time, improves the operating efficiency of hoisting crane entirety.
2, save pre-tightening mechanism of the prior art, before optimizing, the structure of tensioner mechanism, reduces the complexity of front tensioned lines pretension, reduces the weight of super lifting device entirety.
3, according to the work elevation angle of the different operating modes of crane arm, by controlling the angular displacement of elevator, the size of the predetermincd tension of front tightening device can be adjusted, thus corresponding different predetermincd tension requirements can be met according to the different work operating mode of hoisting crane.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.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 (10)
1. a tensioner mechanism before, described front tensioner mechanism is applied to Telescopic crane, and described front tensioner mechanism comprises:
Mast (2), the first end of described mast (2) is crane arm coupling end (21), and the second end of described mast (2) is free end (22);
Elevator (3), described elevator (3) is arranged on described mast (2); And
Oblique tensioner mechanism, the first end of described oblique tensioner mechanism is connected on the described free end (22) of described mast (2), and the second end of described oblique tensioner mechanism is crane arm pull side;
Line between the described crane arm coupling end (21) of described mast (2), the described free end (22) of described mast (2) and the described crane arm pull side of described oblique tensioner mechanism forms triangle;
It is characterized in that, described elevator (3) is positioned between the described crane arm coupling end (21) of described mast (2) and the described first end of described oblique tensioner mechanism;
In described oblique tensioner mechanism is N multiplying power assembly pulley (5) at least partially, wherein N be more than or equal to 2 natural number, described in front tensioned lines (4) pile warp, N multiplying power assembly pulley (5) is connected with described elevator (3) afterwards.
2. front tensioner mechanism according to claim 1, is characterized in that,
Described N multiplying power assembly pulley (5) has movable end and is fixed on the fixed end on the described free end (22) of described mast (2), and described fixed end is as the described first end of described oblique tensioner mechanism;
Described oblique tensioner mechanism also comprises connecting portion, and the first end of described connecting portion is connected with the described movable end of described N multiplying power assembly pulley (5), and the second end of described connecting portion is as described crane arm pull side;
The first end of described front tensioned lines (4) is fixed on described mast (2), and the second end is connected on described elevator (3) after movable end, described fixed end described in pile warp successively.
3. front tensioner mechanism according to claim 2, it is characterized in that, described N multiplying power assembly pulley (5) comprises running block (51), described running block (51) is as described free end, described second end of described front tensioned lines (4) successively running block described in pile warp (51) and described fixed end to form N multiplying power, wherein N be more than or equal to 2 natural number.
4. front tensioner mechanism according to claim 3, it is characterized in that, described N multiplying power assembly pulley (5) also comprises fixed pulley group (52), described fixed pulley group (52) as described fixed end, movable pulley (511) one_to_one corresponding in the fixed pulley (521) in described fixed pulley group (52) and described running block (51).
5. tensioner mechanism before according to any one of claim 2 to 4, it is characterized in that, described connecting portion comprises arm-tie (6), the first end of described arm-tie (6) and the described movable end of described N multiplying power assembly pulley (5) hinged, the second end of described arm-tie (6) has hinge hole as described crane arm pull side.
6. tensioner mechanism before according to any one of claim 2 to 4, is characterized in that, described connecting portion comprises connection cord, and the first end of described connection cord is connected with described movable end, and the second end of described connection cord is as described crane arm pull side.
7. front tensioner mechanism according to any one of claim 1 to 4, is characterized in that, described elevator (3) is arranged on the middle part of described mast (2).
8. front tensioner mechanism according to any one of claim 1 to 4, it is characterized in that, described elevator (3) has along the first circumferencial direction rotation with the first mode of operation straining described front tensioned lines (4), and rotate the second mode of operation to unclamp described front tensioned lines (4) along the second circumferencial direction contrary with described first circumferencial direction, the predetermincd tension of described front tensioner mechanism adjusts with the variation in angular displacement of described elevator (3).
9. a super lifting device, comprises front tensioner mechanism, it is characterized in that, described front tensioner mechanism according to any one of claim 1 to 8 before tensioner mechanism.
10. a hoisting crane, comprising:
Crane arm (1), described crane arm (1) comprises basic arm joint (11), telescopic boom joint (12) and arm head (13), the length direction that described telescopic boom joint (12) saves (11) along described basic arm is arranged on described basic arm joint (11) movingly, and described arm head (13) is arranged on the end away from described basic arm joint (11) of described telescopic boom joint (12); And
Super lifting device, described super lifting device is arranged on described crane arm (1);
It is characterized in that, described super lifting device is super lifting device according to claim 9, described mast (2) is arranged on described basic arm joint (11), and the described crane arm pull side of described oblique tensioner mechanism is connected to the end of the close described arm head (13) of described arm head (13) or described telescopic boom joint (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410218783.0A CN105084226A (en) | 2014-05-22 | 2014-05-22 | Front tensioning mechanism, super-lift device with front tensioning mechanism and crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410218783.0A CN105084226A (en) | 2014-05-22 | 2014-05-22 | Front tensioning mechanism, super-lift device with front tensioning mechanism and crane |
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| CN105084226A true CN105084226A (en) | 2015-11-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410218783.0A Pending CN105084226A (en) | 2014-05-22 | 2014-05-22 | Front tensioning mechanism, super-lift device with front tensioning mechanism and crane |
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| CN (1) | CN105084226A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| CN109915201A (en) * | 2017-12-12 | 2019-06-21 | 三一重型装备有限公司 | Transportation system and driving system for drill loader |
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| SU494339A1 (en) * | 1974-01-07 | 1975-12-05 | Челябинский Механический Завод | Crane boom safety device |
| CN102515039A (en) * | 2011-11-21 | 2012-06-27 | 三一汽车起重机械有限公司 | Crane and super-lifting device thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| SU494339A1 (en) * | 1974-01-07 | 1975-12-05 | Челябинский Механический Завод | Crane boom safety device |
| CN102515039A (en) * | 2011-11-21 | 2012-06-27 | 三一汽车起重机械有限公司 | Crane and super-lifting device thereof |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| CN109915201A (en) * | 2017-12-12 | 2019-06-21 | 三一重型装备有限公司 | Transportation system and driving system for drill loader |
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