CN201801334U - Crane and rear-tilting-preventing cylinder of the crane - Google Patents
Crane and rear-tilting-preventing cylinder of the crane Download PDFInfo
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- CN201801334U CN201801334U CN2010205443376U CN201020544337U CN201801334U CN 201801334 U CN201801334 U CN 201801334U CN 2010205443376 U CN2010205443376 U CN 2010205443376U CN 201020544337 U CN201020544337 U CN 201020544337U CN 201801334 U CN201801334 U CN 201801334U
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Abstract
The utility model discloses a rear-tilting-preventing cylinder comprising a cylinder barrel (1), a cylinder rod (2) and a cylinder rod piston (3), wherein the cylinder rod piston (3) divides the cavity of the cylinder barrel (1) into a rodless cavity (11) and a rod cavity (12); the cylinder rod (2) is provided with a cylinder rod inner cavity (21); the cylinder rod inner cavity (21) is internally provided with an oil-gas separating piston (22) which divides the cylinder rod inner cavity (21) into a first inner cavity (211) and a second inner cavity (212); the cylinder rod piston (3) is provided with a damping hole (31); the rodless cavity (11) is filled with hydraulic oil; and the second inner cavity (212) is filled with gas. On the one hand, the rear-tilting-preventing cylinder has high working reliability and can realize two limit positions of a maximum stroke and a dead stroke, therefore, the total length of the rear-tilting-preventing cylinder can be reduced in design; and on the other hand, the rear-tilting-preventing cylinder is simple in structure, small in occupied area and convenient to install. In addition, the utility model also discloses a crane comprising the rear-tilting-preventing cylinder.
Description
Technical field
The utility model relates to the hoisting crane technical field, particularly a kind of anti-hypsokinesis cylinder.The utility model also relates to a kind of hoisting crane that comprises described anti-hypsokinesis cylinder.
Background technology
In large-tonnage, super-tonnage all terrain crane, relation between brachium and the lifting performance is a kind of contradictory relation, though when long-armed, highly reached requirement, but load-carrying ability is limited, generally have only tens tons, can not satisfy current demand far away, also not embody the performance advantage of large-tonnage, super-tonnage hoisting crane simultaneously.The lifting performance of hoisting crane when long-armed in order to promote, the tower arm arises at the historic moment, and nowadays, the tower arm has become must being equipped with of large-tonnage, super-tonnage all terrain crane and has put.
Please refer to Fig. 1 and Fig. 2, Fig. 1 is the structural representation of a kind of representative type all terrain crane in the prior art; Fig. 2 is an annexation scheme drawing of preventing hypsokinesis cylinder and tower arm and principal arm in the prior art.
As shown in Figure 1, full ground hoisting crane comprise principal arm 1 ' and with principal arm 1 ' bonded assembly tower arm 3 ', as shown in Figure 2, principal arm 1 ' top is provided with link span 1 ' 1, anti-hypsokinesis cylinder 2 ' one ends are connected with link span 1 ' 1, the other end is connected with preceding luffing bracket assembly 6 ' 1, and link span 1 ' 1 also is connected with back luffing bracket assembly 6 ' 2, is provided with arm-tie assembly 5 ' 1 between former and later two bracket assemblys.As shown in Figure 1, by luffing assembly pulley 4 ' 2 pulling arm-tie assemblies 5 ' 1, arm-tie assembly 5 ' 1 is by preceding arm-tie assembly 5 ' 2 pulling tower arms 3 ' luffing under the drive of motor for tower arm luffing elevator assembly 4 ' 1.When tower arm 3 ' wide-angle luffing, if the anti-hypsokinesis cylinder 2 of preceding luffing bracket assembly 6 ' 1 ' support, will cause the 3 ' hypsokinesis of whole tower arm, and then roll-over accident might take place, therefore anti-hypsokinesis cylinder 2 ' be guarantees tower arm 3 ' the carry out important structure part of safe luffing.
Please refer to Fig. 3, Fig. 3 is the structural representation of a kind of oil cylinder balance cock compound type anti-squat system in the prior art.
Oil cylinder balance cock compound type anti-squat system mainly is made up of balance cock and oil cylinder, and oil cylinder is used for the support tower arm and prevents hypsokinesis, and balance cock is controlled the opening amount of balance cock and then the variation in the big chamber 2 ' 1 of control oil cylinder by the size of control current.
During the hypsokinesis of tower arm, (1), the change procedure of pressure is: the hypsokinesis of tower arm causes the big chamber of oil cylinder 2 ' 1 pressurizeds, pressure raises, this moment, oil cylinder cylinder length needed to shorten, to cooperate the increase of tower arm angle, big chamber 2 ' 1 must guarantee enough pressure in the process that oil cylinder shortens, and this just need control the size and then the control presssure of balance cock restriction by the size of control current, with the product that satisfies big chamber 2 ' 1 pressure and area greater than the required support reaction of tower arm; (2), the change procedure of flow is: the hypsokinesis of tower arm causes big chamber 2 ' 1 pressed volume to reduce, and flow flows out by the balance cock restriction, simultaneously oil cylinder loculus 2 ' 2 is carried out repairing, does not inhale sky to guarantee oil cylinder loculus 2 ' 2.
When the tower arm leans forward, (1), the change procedure of pressure is: need promote the luffing bracket assembly when tower arm leans forward, so that tower arm elevator put rope can tensioner, disorder cable not, this just requires the big chamber 2 ' 1 of oil cylinder that enough pressure is arranged, therefore can supply pressure oil to satisfy pressure demand by the change-over valve commutation that links to each other with pump, loculus 2 ' 2 be connected fuel tanks simultaneously, oil return smoothly; (2), the change procedure of flow is: big chamber 2 ' 1 increases, and required flow increases, and provide enough flows by the change-over valve commutation by pump, and loculus 2 ' 2 reduces oil return.
Above-mentioned oil cylinder balance cock convolution anti-squat system needs outside oil sources, brachium is generally more than 80 meters when the box-shaped arm is stretched entirely, and oil sources must obtain from pump, pump links to each other with driving engine, length requirement when this satisfies full semi-girder with regard to requiring enough big hose reel, and so big reel need take very big installing space, and this all terrain crane to the space compactness is a stern challenge, may realize hardly.In addition, huge reel also can increase the weight of complete machine, reduces the lift heavy amount, is a negative factor for the lifting of performance.Moreover the prolongation of pipeline also can cause the reduction of anti-hypsokinesis oil cylinder responding ability, and the length response more than 80 meters is very slow, in case emergency takes place, will be difficult to control.At last, the electric current of controlling electric proportional balancing valve has determined the size of the big cavity pressure of oil cylinder, and the required pressure in the big chamber of oil cylinder changes with cylinder is long, this just requires the size of electric current will carry out at any time adjustment, this adjustment needs more accurate calculating, yet this more accurate calculating has implemented big difficulty.
Please refer to Fig. 4, Fig. 4 is the structural representation of the anti-hypsokinesis spring cylinder of a kind of embedded with spring in the prior art.
In the process of tower arm hypsokinesis, the hypsokinesis of tower arm will make the spring cylinder stroke shorten, and until dead journey, is in pressured state at whole process medi-spring always, and spring force prevents the hypsokinesis of tower arm as reaction of bearing.In the process that the tower arm leans forward, leaning forward of tower arm can make spring cylinder 7 ' stroke increase, until range, in whole process, the amount of compression that produces in the pre compressed magnitude of spring and the hypsokinesis process is released, and spring force also promotes leaning forward of tower arm as thrust simultaneously.
Above-mentioned embedded with spring is prevented hypsokinesis spring cylinder 7 ' owing to adopt the bearing force of spring force as the hypsokinesis of tower arm, so in case spring is determined, whole spring cylinder 7 ' in compression process the support reaction that can provide also just determine, so before making anti-hypsokinesis spring cylinder, just need more accurate tower arm hypsokinesis support reaction, if error is bigger, spring cylinder 7 ' can not provide the tower arm required anti-hypsokinesis support reaction, whole in this case anti-hypsokinesis spring cylinder 7 ' will scrap will be provided.In addition, in the process of tower arm hypsokinesis, anti-hypsokinesis support reaction is to reduce gradually along with the long shortening of cylinder, it is a kind of directly proportional relation, but not inverse proportional relation, and the long variation of spring force and cylinder is the inverse proportional relation, so this required maximum support reaction of tower arm when requiring spring will have enough pre compressed magnitudes to provide to prevent hypsokinesis spring cylinder 7 ' the longest, this just causes the spring difficult design, can not make full use of the compression of spring characteristic.Moreover the most important is to work as length of spring compressed on earth, and spring length has taken the stroke of too many cylinder, and cylinder can not be compressed at the end, so also just can not make full use of the whole stroke of anti-hypsokinesis spring cylinder.At last, go all out to reach as high as hundreds of tons behind the tower arm of large-tonnage, super-tonnage hoisting crane, spring is difficult to provide big power like this to realize anti-hypsokinesis function.
In sum, guaranteeing on simple in structure, the basis little, easy for installation that takes up space, how to improve the reliability of anti-hypsokinesis cylinder working, and can make anti-hypsokinesis cylinder can realize range and dead two end positions of journey, thereby reducing anti-hypsokinesis cylinder design-calculated length overall, is the problem that those skilled in the art need solution badly.
The utility model content
The technical problems to be solved in the utility model provides a kind of anti-hypsokinesis cylinder, and this anti-hypsokinesis cylinder has higher functional reliability on the one hand, and can realize range and dead two end positions of journey, thereby reduces anti-hypsokinesis cylinder design-calculated length overall; Simple in structure on the other hand, take up space little, easy for installation and cost lower.In addition, another technical matters that will solve of the utility model is for providing a kind of hoisting crane that comprises above-mentioned anti-hypsokinesis cylinder.
For solving the problems of the technologies described above, the utility model provides a kind of anti-hypsokinesis cylinder, is used for hoisting crane, comprises cylinder barrel, cylinder bar and cylinder bar piston, and the cavity that described cylinder bar piston is separated described cylinder barrel is rodless cavity and rod chamber, and described cylinder bar is provided with cylinder bar inner chamber; Be provided with movably Oil-gas Separation piston in the described cylinder bar inner chamber, described Oil-gas Separation piston is separated described cylinder bar inner chamber near first inner chamber of described cylinder bar piston one side and away from second inner chamber of described cylinder bar piston one side; Described cylinder bar piston is provided with the damping hole that is communicated with described rodless cavity and described first inner chamber, is filled with hydraulic oil in the described rodless cavity, is filled with gas in described second inner chamber.
Preferably, described cylinder barrel is provided with cylinder bottom, and described cylinder bottom is provided with the oil-filled hole that is communicated with described rodless cavity, and described oil-filled hole is connected with fuel delivery device.
Preferably, described cylinder bottom also is provided with the survey oil pressure hole, and described survey oil pressure hole is connected with the oil pressure detecting device.
Preferably, described cylinder bar is provided with the bar head, and described bar head is provided with the air-filled pore that is communicated with described second inner chamber, and described air-filled pore is connected with air delivery device.
Preferably, described bar head also is provided with the survey pressure hole, and described survey pressure hole is connected with pressure test device.
Preferably, the described pressure test device pressure that is provided with described second inner chamber sends the warning device of alerting signal during less than predetermined value.
Preferably, described hoisting crane is provided with control setup and reaches and described control setup bonded assembly tower arm elevator, and described control setup is connected with warning device so that brake described tower arm elevator or make its deceleration according to described alerting signal.
Preferably, described anti-hypsokinesis cylinder comprise detect described cylinder bar near the primary importance of its end of run and send first signal first detector switch, detect described cylinder bar further near the second place of its end of run and send second detector switch of secondary signal and detect piece, described first detector switch and described second detector switch are installed on described cylinder barrel, and described detection piece is installed on described cylinder bar; Described anti-hypsokinesis cylinder also comprises control element, and described control element all is connected with described second detector switch with described first detector switch, so that according to first signal and secondary signal, and the corresponding respectively tower arm elevator that slows down and brake described hoisting crane.
Preferably, the end of described cylinder barrel is provided with mounting bracket, and described mounting bracket comprises the extension that stretches out described cylinder barrel end; Described first detector switch is installed on the outer end of described extension, and described second detector switch is installed on the inner of described extension.
In addition, for solving the problems of the technologies described above, the utility model also provides a kind of hoisting crane, luffing bracket assembly and principal arm before comprising; Described hoisting crane also comprises above-mentioned each described anti-hypsokinesis cylinder, and described anti-hypsokinesis cylinder one end is connected with described preceding luffing bracket assembly, and the other end is connected with described principal arm.
On the basis of existing technology, be provided with movably Oil-gas Separation piston in the cylinder bar inner chamber of anti-hypsokinesis cylinder provided by the utility model, described Oil-gas Separation piston is separated described cylinder bar inner chamber near first inner chamber of described cylinder bar piston one side and away from second inner chamber of described cylinder bar piston one side; Described cylinder bar piston is provided with the damping hole that is communicated with described rodless cavity and described first inner chamber, is filled with hydraulic oil in the described rodless cavity, is filled with gas in described second inner chamber.
In the process of tower arm hypsokinesis, hydraulic oil pressurized in the rodless cavity, thereby pressurised hydraulic flows to first inner chamber by the damping hole of being located on the cylinder bar piston, hydraulic oil in first inner chamber can promote the Oil-gas Separation piston to one lateral movement of second inner chamber at this moment, thereby second gas volume in the inner chamber reduce, pressure increases, follow carat imperial equation of uncle, and when the gaseous tension in second inner chamber equals the pressure of the hydraulic oil in first inner chamber, the stop motion of Oil-gas Separation piston reaches pressure balance; When the tower arm continues hypsokinesis, hydraulic oil in the rodless cavity is pressurized once more, repeat said process, reach pressure balance once more, until the hypsokinesis of tower arm during to end position, this moment, anti-hypsokinesis cylinder reached the compression limit position, and the cylinder bar is compressed to the cylinder bottom of cylinder barrel, whole and then first inner chamber of the hydraulic oil in the rodless cavity.The tower arm leans forward in the process, and the working process of anti-hypsokinesis cylinder is opposite with said process, does not repeat them here.
In above-mentioned working process, on cylinder bar piston, be provided with damping hole, to prevent that by damping hole the rodless cavity of hypsokinesis cylinder and first inner chamber are communicated with, thereby the hydraulic oil in the rodless cavity can enter in first inner chamber by damping hole lentamente, and then can realize the smooth change of pressure, and do not produce impact, thereby improved the reliability of work.
In addition, the stroke of above-mentioned anti-hypsokinesis cylinder is the same with oil cylinder, can realize range and dead two end positions of journey, thereby can reduce anti-hypsokinesis cylinder design-calculated length overall, and reserved more wide space for the installation of anti-hypsokinesis cylinder, easy for installation, it is more reasonable to design.
Moreover, with respect to oil cylinder balance cock compound type anti-squat system of the prior art, anti-hypsokinesis cylinder of the present utility model is that oil gas is in conjunction with cylinder, and the volume of the hydraulic oil in the rodless cavity and first inner chamber does not change all the time, thereby the oil pipe that does not need to be provided with more than 80 meters carries out oil-filled or oil return, thereby simple in structure, take up space little, easy for installation, and the problem of also having avoided simultaneously the responding ability that oil pipe caused more than 80 meters to reduce.
Moreover, with respect to anti-hypsokinesis spring cylinder of the prior art, inflation pressure in second inner chamber of the anti-hypsokinesis cylinder of the utility model can change as required flexibly, thereby in same travel position, its bearing force that can provide can change, thereby before design, do not want accurate Calculation load, avoided anti-hypsokinesis spring cylinder to need the problem of accurate Calculation load.
At last, anti-hypsokinesis cylinder of the present utility model is simply to design on the basis of existing oil cylinder, and the course of processing and oil cylinder are basic identical, need not special processing, thus simple in structure, cost is lower.
In sum, anti-hypsokinesis cylinder provided by the utility model has higher functional reliability on the one hand, and can realize range and dead two end positions of journey, thereby reduces anti-hypsokinesis cylinder design-calculated length overall; Simple in structure on the other hand, take up space little, easy for installation and cost lower.
In addition, the technique effect of the technique effect of hoisting crane provided by the utility model and above-mentioned anti-hypsokinesis cylinder is basic identical, does not repeat them here.
Description of drawings
Fig. 1 is the structural representation of a kind of representative type all terrain crane in the prior art;
Fig. 2 is an annexation scheme drawing of preventing hypsokinesis cylinder and tower arm and principal arm in the prior art;
Fig. 3 is the structural representation of a kind of oil cylinder balance cock compound type anti-squat system in the prior art;
Fig. 4 is the structural representation of the anti-hypsokinesis spring cylinder of a kind of embedded with spring in the prior art;
Structural representation when Fig. 5 extends the limit for anti-hypsokinesis cylinder among a kind of embodiment of the utility model is in;
Structural representation when Fig. 6 is compressed to intermediateness for the anti-hypsokinesis cylinder among Fig. 5;
Structural representation when Fig. 7 continues to be compressed to another intermediateness for the anti-hypsokinesis cylinder among Fig. 6;
Structural representation when Fig. 8 continues to be compressed to compression limit for the anti-hypsokinesis cylinder among Fig. 7;
Fig. 9 is the structural representation of anti-hypsokinesis cylinder among the another kind of embodiment of the utility model;
Figure 10 is the principle control block diagram of anti-hypsokinesis cylinder among Fig. 9;
Principle control block diagram after anti-hypsokinesis cylinder among Figure 11 Fig. 9 further improves.
Wherein, the corresponding relation between component names and the Reference numeral is among Fig. 1 to Fig. 4:
Principal arm 1 '; Link span 1 ' 1; Anti-hypsokinesis cylinder 2 '; The big chamber 2 ' 1 of oil cylinder; Oil cylinder loculus 2 ' 2; Tower arm 3 '; Tower arm luffing elevator assembly 4 ' 1; Luffing assembly pulley 4 ' 2; Arm-tie assembly 5 ' 1; Preceding arm-tie assembly 5 ' 2; Preceding luffing bracket assembly 6 ' 1; Back luffing bracket assembly 6 ' 2.
Corresponding relation among Fig. 5 to Figure 11 between component names and the Reference numeral is:
Cylinder barrel 1; Rodless cavity 11; Rod chamber 12; Cylinder bottom 13; Oil-filled hole 131; Survey oil pressure hole 132; Cylinder bar 2; Cylinder bar inner chamber 21; First inner chamber 211; Second inner chamber 212; Oil-gas Separation piston 22; Bar head 23; Air-filled pore 231; Survey pressure hole 232; Cylinder bar piston 3; Damping hole 31; Position detecting element 4; First detector switch 41; Second detector switch 42; Detect piece 43; Control element 5; Tower arm elevator 6; Extension 7.
The specific embodiment
Core of the present utility model provides a kind of anti-hypsokinesis cylinder, and this anti-hypsokinesis cylinder has higher functional reliability on the one hand, and can realize range and dead two end positions of journey, thereby reduces anti-hypsokinesis cylinder design-calculated length overall; Simple in structure on the other hand, take up space little, easy for installation and cost lower.In addition, another core of the utility model is for providing a kind of hoisting crane that comprises above-mentioned anti-hypsokinesis cylinder.
In order to make those skilled in the art understand the technical solution of the utility model better, the utility model is described in further detail below in conjunction with the drawings and specific embodiments.
Please refer to Fig. 5, Fig. 6, Fig. 7 and Fig. 8, the structural representation when Fig. 5 extends the limit for anti-hypsokinesis cylinder among a kind of embodiment of the utility model is in; Structural representation when Fig. 6 is compressed to intermediateness for the anti-hypsokinesis cylinder among Fig. 5; Structural representation when Fig. 7 continues to be compressed to another intermediateness for the anti-hypsokinesis cylinder among Fig. 6; Structural representation when Fig. 8 continues to be compressed to compression limit for the anti-hypsokinesis cylinder among Fig. 7.
In one embodiment, anti-hypsokinesis cylinder provided by the utility model is used for hoisting crane, comprises cylinder barrel 1, cylinder bar 2 and cylinder bar piston 3, and the cavity that cylinder bar piston 3 is separated cylinder barrel 1 is rodless cavity 11 and rod chamber 12, and cylinder bar 2 is provided with cylinder bar inner chamber 21.
On the basis of above-mentioned prior art, extremely shown in Figure 8 as Fig. 5, be provided with movably Oil-gas Separation piston 22 in the cylinder bar inner chamber 21, this Oil-gas Separation piston 22 is divided into two parts with cylinder bar inner chamber 21, be respectively near first inner chamber 211 of cylinder bar piston 3 one sides with away from second inner chamber 212 of cylinder bar piston 3 one sides, and cylinder bar piston 3 is provided with the damping hole 31 that is communicated with the rodless cavity 11 and first inner chamber 211, be filled with hydraulic oil in the rodless cavity 11, be filled with gas in second inner chamber 212.
As shown in Figure 5, when anti-hypsokinesis cylinder was in the elongation limit, the gas volume maximum of second inner chamber 212 was V
1The volume V of 1, the first inner chamber 211
12 is zero (the determined volume of Oil-gas Separation piston 22 depressed parts can be ignored), and this moment, hydraulic oil all entered in the rodless cavity 11, and volume is V
13.
When the tower arm begins hypsokinesis, as shown in Figure 6, anti-hypsokinesis cylinder is compressed, at this moment, the hydraulic oil in the rodless cavity 11 enters in first inner chamber 211 by damping hole 31, and the hydraulic oil in first inner chamber 211 can promote Oil-gas Separation piston 22 to 212 1 lateral movements of second inner chamber, second inner chamber, 212 gas volumes reduce, pressure increases, and follows carat imperial equation of uncle, until reaching state of equilibrium; At this moment, the gas volume of second inner chamber 212 is V
2The volume of the hydraulic oil of 1, the first inner chamber 211 is V
22, the volume of the hydraulic oil in the rodless cavity 11 is V
23, because the hydraulic oil cumulative volume is constant, thereby V
13=V
22+V
23.
The tower arm continues hypsokinesis, as shown in Figure 7, anti-hypsokinesis cylinder is compressed once more, the hydraulic oil of rodless cavity 11 continues to enter in first inner chamber 211 again, Oil-gas Separation piston 22 continues to 212 1 lateral movements of second inner chamber, second inner chamber, 212 gas volumes continue to reduce, and pressure continues to increase, until reaching state of equilibrium once more; At this moment, the gas volume of second inner chamber 212 is V
3The volume of the hydraulic oil of 1, the first inner chamber 211 is V
32, the volume of the hydraulic oil in the rodless cavity 11 is V
33, because the hydraulic oil cumulative volume is constant, thereby V
13=V
22+V
23=V
32+V
33.
When tower arm hypsokinesis during to end position, as shown in Figure 8, anti-hypsokinesis cylinder is compressed in end position, hydraulic oil in the rodless cavity 11 all enters in first inner chamber 211, Oil-gas Separation piston 22 continues to 212 1 lateral movements of second inner chamber again, second inner chamber, 212 gas volumes continue to reduce again, and pressure continues to increase again, until reaching state of equilibrium once more; At this moment, the gas volume of second inner chamber 212 is V
4The volume of the hydraulic oil of 1, the first inner chamber 211 is V
42, the volume of hydraulic oil is zero in the rodless cavity 11, thereby V
13=V
22+V
23=V
32+V
33=V
42.
Below will introduce technique effect of the present utility model:
In above-mentioned working process, on cylinder bar piston 3, be provided with damping hole 31, to prevent that by damping hole 31 rodless cavity 11 of hypsokinesis cylinder and first inner chamber 211 are communicated with, thereby the hydraulic oil in the rodless cavity 11 can enter in first inner chamber 211 by damping hole 31 lentamente, and then can realize the smooth change of pressure, and do not produce impact, thereby improved the reliability of work.
In addition, the stroke of above-mentioned anti-hypsokinesis cylinder is the same with oil cylinder, can realize range and dead two end positions of journey, thereby can reduce anti-hypsokinesis cylinder design-calculated length overall, and reserved more wide space for the installation of anti-hypsokinesis cylinder, easy for installation, it is more reasonable to design.
Moreover, with respect to oil cylinder balance cock compound type anti-squat system of the prior art, anti-hypsokinesis cylinder of the present utility model is that oil gas is in conjunction with cylinder, and the volume of the hydraulic oil in the rodless cavity 11 and first inner chamber 211 does not change all the time, thereby the oil pipe that does not need to be provided with more than 80 meters carries out oil-filled or the oil return operation, thereby simple in structure, take up space little, easy for installation, and the problem of also having avoided simultaneously the responding ability that oil pipe caused more than 80 meters to reduce.
Moreover, with respect to anti-hypsokinesis spring cylinder of the prior art, inflation pressure in second inner chamber 212 of the anti-hypsokinesis cylinder of the utility model can change as required flexibly, thereby in same travel position, its support reaction that can provide can change, thereby before design, do not want accurate Calculation load, avoided anti-hypsokinesis spring cylinder to need the problem of accurate Calculation load.
At last, anti-hypsokinesis cylinder of the present utility model is simply to design on the basis of existing oil cylinder, and the course of processing and oil cylinder are basic identical, need not special processing, thus simple in structure, cost is lower.
In sum, anti-hypsokinesis cylinder provided by the utility model has higher functional reliability on the one hand, and can realize range and dead two end positions of journey, thereby reduces anti-hypsokinesis cylinder design-calculated length overall; Simple in structure on the other hand, take up space little, easy for installation and cost lower.
Need to prove, in anti-hypsokinesis cylinder of the present utility model, can in cylinder bar inner chamber 21, Oil-gas Separation piston 3 be set, aerification all in cylinder bar inner chamber 21 and the rodless cavity 11; On this basis, anti-hypsokinesis cylinder is compressed, and the gas in the rodless cavity 11 enters in the cylinder bar inner chamber 21 by damping hole 31, and volume of gas reduces, and pressure increases, and follows carat imperial equation of uncle, obviously also can provide the tower arm to prevent the needed support reaction of hypsokinesis.In case the hypsokinesis cylinder is in when extending the limit is example, anti-hypsokinesis cylinder and the utility model of this kind structure design is provided with the anti-hypsokinesis cylinder of Oil-gas Separation piston 3 and compares, the volume of the former gas is the volume sum of cylinder bar inner chamber 21 and rodless cavity 11, the volume of latter's gas is the volume of cylinder bar inner chamber 21, the former gas volume is greater than the latter's gas volume, according to the imperial equation P of carat uncle
1V
1=P
2V
2As can be known, the former and the latter's gas volume all is compressed a unit volume V, the latter's gaseous tension increase value is greater than the pressure increase value of the former gas, thereby the anti-hypsokinesis cylinder that the utility model is provided with Oil-gas Separation piston 3 can provide the bigger anti-hypsokinesis support reaction of tower arm.
In addition, need to prove also that the area that Oil-gas Separation piston 3 can be set is S
1, the sectional area of rodless cavity 11 is S
2, gaseous tension is P in second inner chamber 212
1, the pressure of the hydraulic oil in the rodless cavity 11 and first inner chamber 211 is P
2, when reaching state of equilibrium, P
1=P
2On this basis, prevent that the support reaction that the hypsokinesis cylinder provides is P
2S
2, design by structure anti-hypsokinesis cylinder, such as the sectional area that reduces cylinder bar inner chamber 21, that is reduce the volume of gas in second inner chamber 211, according to the analysis of the preceding paragraph as can be known, this kind design can increase the support reaction that anti-hypsokinesis cylinder provides as required; Perhaps also can increase the support reaction that anti-hypsokinesis cylinder is provided by the mode that increases rodless cavity 11 sectional areas.
Please refer to Fig. 9, Fig. 9 is the structural representation of anti-hypsokinesis cylinder among the another kind of embodiment of the utility model.
In the above-described embodiments, can also make further improvement, thereby obtain another kind of embodiment of the present utility model.Such as, cylinder barrel 1 is provided with cylinder bottom 13, and cylinder bottom 13 is provided with the oil-filled hole 131 that is communicated with rodless cavity 11, and oil-filled hole 131 is connected with fuel delivery device.The volume of the hydraulic oil in the airtight cavity that rodless cavity 11, damping hole 31231 and cylinder bar inner chamber 21 form more after a little while, can be oil-filled in described rodless cavity 11 by described fuel delivery device, alerting ability is higher, thereby has avoided preventing hypsokinesis spring cylinder spring in the prior art in case destroy the problem of just scrapping.
Further, cylinder bottom 13 also is provided with surveys oil pressure hole 132, surveys oil pressure hole 132 and is connected with the oil pressure detecting device.Institute's oil pressure detecting device can detect the pressure of hydraulic oil at any time, thereby makes operating personal can grasp pressure changing at any time, when the pressure variation appearance of hydraulic oil is unusual, can take corresponding safety measure.Described oil pressure detecting device is specifically as follows pressure sensor, can also be the pressure detecting part of other types certainly.
Further, as shown in Figure 9, cylinder bar 2 is provided with bar head 23, and bar head 23 is provided with the air-filled pore 231 that is communicated with second inner chamber 212, and air-filled pore 231 is connected with air delivery device.Gas in second inner chamber 212 can be inflated in second inner chamber 212 by described air delivery device more after a little while, and alerting ability is higher; And can root as required, in second inner chamber 212, charge into more gas, to increase the anti-hypsokinesis support reaction that anti-hypsokinesis cylinder can provide.
Further, as shown in Figure 9, bar head 23 also is provided with surveys pressure hole 232, surveys pressure hole 232 and is connected with pressure test device.Described pressure test device can detect the pressure in second inner chamber 212 at any time, thereby makes operating personal can grasp pressure changing at any time, when pressure variation appearance is unusual, can take corresponding safety measure.Such as, described pressure test device can be provided with warning device, and when the pressure of detected second inner chamber 212 of described pressure test device during less than predetermined value, described warning device sends alerting signal.And further, described warning device is connected with the control setup of hoisting crane, so that described control setup sends the instruction of slowing down or braking according to described alerting signal to the tower arm elevator 6 of described hoisting crane.
When the pressure in second inner chamber 212 during less than predetermined value, warning device sends alerting signal, and this signal is transferred to described control setup, described control setup automatic guidance tower arm elevator 6 brake snub, and this mode has higher intelligent level.In addition, control setup also further can be connected with described air delivery device, and described control setup is controlled described air delivery device to 212 gas transmissions of second inner chamber when receiving described alerting signal, this mode has higher intelligent level equally, and has further improved safety.
Please refer to Figure 10 and Figure 11, Figure 10 is the principle control block diagram of anti-hypsokinesis cylinder among Fig. 9; Principle control block diagram after anti-hypsokinesis cylinder among Figure 11 Fig. 9 further improves.
In above-mentioned any embodiment of the utility model, can also make further improvement.Such as, please refer to Figure 10, described anti-hypsokinesis cylinder can also comprise position detecting element 4, is used for detecting the position of cylinder bar 2 in retraction process, and sends signal; At this, need to prove, the detecting element of any type, as long as can detect cylinder bar 2 in retraction process the position and send signal, all within the protection domain of present embodiment.
Described anti-hypsokinesis cylinder also comprises control element 5, is used for the signal that receiving position detecting element 4 sends, and sends instruction according to this signal.At this, it is pointed out that control element 5 and control setup mentioned above can be same controller.
When cylinder bar 2 bounced back to primary importance near its end of run, position detecting element 4 sent first signal, and control element 5 slows down according to the described first signal control tower arm elevator 6, and then the hypsokinesis of control tower arm is slowed down.
When cylinder bar 2 further bounced back to the second place near its end of run, position detecting element 4 sent secondary signal, and control element 5 is according to described secondary signal control tower arm elevator 6 brakings, and then control tower arm hypsokinesis braking.
The anti-hypsokinesis cylinder that present embodiment provided has been realized the steady deceleration and the safety arrestment of the hypsokinesis of tower arm, thereby makes the work of tower arm more safe and reliable.
Please refer to Figure 10, in the above-described embodiments, we can make concrete setting to position detecting element 4, particularly, position detecting element 4 comprises first detector switch 41, second detector switch 42 and detects piece 43, first detector switch 41 and second detector switch 42 are installed on cylinder barrel 1, detect piece 43 and are installed on cylinder bar 2.
When first detector switch 41 detected detection piece 43, first detector switch 41 sent described first signal, and control element 5 slows down according to the described first signal control tower arm elevator 6, and then the hypsokinesis of control tower arm is slowed down.Through after the schedule time, when second detector switch 42 detected detection piece 43, second detector switch 42 sent described secondary signal, and control element 5 is according to described secondary signal control tower arm elevator 6 brakings, and then control tower arm hypsokinesis braking.
Certainly, position detecting element 4 can also be made of a detector switch and two detection pieces, by suitable structure design, when cylinder bar 2 arrives described primary importance, detector switch detects first and detects piece, thereby send first signal, control element 5 slows down according to the described tower arm of described first signal control elevator 6; When cylinder bar 2 arrived the described second place, detector switch detected second and detects piece, thereby sends secondary signal, and control element 5 is according to described secondary signal control tower arm elevator 6 brakings.Obviously, this structure design also can be realized the utility model purpose, the technical solution problem.
Please refer to Fig. 9, in the above-described embodiments, we can make further setting to the installation site of first detector switch 41 and second detector switch 42.Particularly, the end of cylinder barrel 1 is provided with mounting bracket, and described mounting bracket comprises the extension 7 that stretches out cylinder barrel 1 end; First detector switch 41 is installed on the outer end of extension 7, and second detector switch 42 is installed on the inner of extension 7.This setup is simple in structure, and cost is lower.
In addition, the utility model also provides a kind of hoisting crane, luffing bracket assembly and principal arm before comprising; The described anti-hypsokinesis cylinder of also above-mentioned any embodiment of described hoisting crane, described anti-hypsokinesis cylinder one end is connected with described preceding luffing bracket assembly, and the other end is connected with described principal arm; Other parts of described hoisting crane can be with reference to prior art, and this paper no longer launches.
At last, more than hoisting crane provided by the utility model and anti-hypsokinesis cylinder thereof are described in detail.Used specific case herein principle of the present utility model and embodiment are set forth, the explanation of above embodiment just is used for helping to understand method of the present utility model and core concept thereof.Should be understood that; for those skilled in the art; under the prerequisite that does not break away from the utility model principle, can also carry out some improvement and modification to the utility model, these improvement and modification also fall in the protection domain of the utility model claim.
Claims (10)
1. an anti-hypsokinesis cylinder is used for hoisting crane, comprises cylinder barrel (1), cylinder bar (2) and cylinder bar piston (3), and the cavity that described cylinder bar piston (3) is separated described cylinder barrel (1) is rodless cavity (11) and rod chamber (12), and described cylinder bar (2) is provided with cylinder bar inner chamber (21); It is characterized in that, be provided with movably Oil-gas Separation piston (22) in the described cylinder bar inner chamber (21), described Oil-gas Separation piston (22) the described cylinder bar inner chamber of separation (21) is that first inner chamber (211) of close described cylinder bar piston (3) one sides reaches second inner chamber (212) away from described cylinder bar piston (3) one sides; Described cylinder bar piston (3) is provided with the damping hole (31) that is communicated with described rodless cavity (11) and described first inner chamber (211), and described rodless cavity is filled with hydraulic oil in (11), is filled with gas in described second inner chamber (212).
2. anti-hypsokinesis cylinder as claimed in claim 1 is characterized in that described cylinder barrel (1) is provided with cylinder bottom (13), and described cylinder bottom (13) is provided with the oil-filled hole (131) that is communicated with described rodless cavity (11), and described oil-filled hole (131) is connected with fuel delivery device.
3. anti-hypsokinesis cylinder as claimed in claim 2 is characterized in that, described cylinder bottom (13) also is provided with surveys oil pressure hole (132), and described survey oil pressure hole (132) is connected with the oil pressure detecting device.
4. as claim 2 or 3 described anti-hypsokinesis cylinders, it is characterized in that described cylinder bar (2) is provided with bar head (23), described bar head (23) is provided with the air-filled pore (231) that is communicated with described second inner chamber (212), and described air-filled pore (231) is connected with air delivery device.
5. anti-hypsokinesis cylinder as claimed in claim 4 is characterized in that, described bar head (23) also is provided with surveys pressure hole (232), and described survey pressure hole (232) is connected with pressure test device.
6. anti-hypsokinesis cylinder as claimed in claim 5 is characterized in that, the pressure that described pressure test device is provided with described second inner chamber (212) sends the warning device of alerting signal during less than predetermined value.
7. anti-hypsokinesis cylinder as claimed in claim 6, it is characterized in that, described hoisting crane is provided with control setup and reaches and described control setup bonded assembly tower arm elevator (6), and described control setup is connected with warning device so that brake described tower arm elevator (6) or make its deceleration according to described alerting signal.
8. as each described anti-hypsokinesis cylinder of claim 1 to 7, it is characterized in that, described anti-hypsokinesis cylinder comprise detect described cylinder bar (2) near the primary importance of its end of run and send first signal first detector switch (41), detect described cylinder bar (2) further near the second place of its end of run and send second detector switch (42) and the detection piece (43) of secondary signal, described first detector switch (41) and described second detector switch (42) are installed on described cylinder barrel (1), and described detection piece (43) is installed on described cylinder bar (2); Described anti-hypsokinesis cylinder also comprises control element (4), described control element (4) all is connected with described second detector switch (42) with described first detector switch (41), so that according to described first signal and described secondary signal, the corresponding respectively tower arm elevator (6) that slows down and brake described hoisting crane.
9. anti-hypsokinesis cylinder as claimed in claim 8 is characterized in that the end of described cylinder barrel (1) is provided with mounting bracket, and described mounting bracket comprises the extension (7) that stretches out described cylinder barrel (1) end; Described first detector switch (41) is installed on the outer end of described extension (7), and described second detector switch (42) is installed on the inner of described extension (7).
10. a hoisting crane comprises preceding luffing bracket assembly and principal arm; It is characterized in that described hoisting crane comprises also that as each described anti-hypsokinesis cylinder of claim 1 to 9 described anti-hypsokinesis cylinder one end is connected with described preceding luffing bracket assembly, the other end is connected with described principal arm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205443376U CN201801334U (en) | 2010-09-25 | 2010-09-25 | Crane and rear-tilting-preventing cylinder of the crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205443376U CN201801334U (en) | 2010-09-25 | 2010-09-25 | Crane and rear-tilting-preventing cylinder of the crane |
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| Publication Number | Publication Date |
|---|---|
| CN201801334U true CN201801334U (en) | 2011-04-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010205443376U Expired - Lifetime CN201801334U (en) | 2010-09-25 | 2010-09-25 | Crane and rear-tilting-preventing cylinder of the crane |
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| CN (1) | CN201801334U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102408073A (en) * | 2010-09-25 | 2012-04-11 | 徐州重型机械有限公司 | Crane and anti-tipback cylinder thereof |
| CN102425201A (en) * | 2011-11-30 | 2012-04-25 | 北京市三一重机有限公司 | Back-tilting-preventing moment limiter for arm support |
| CN102502408A (en) * | 2011-10-20 | 2012-06-20 | 中联重科股份有限公司 | Hydraulic crane amplitude-variation rebound defect control system and automobile crane |
| CN102515043A (en) * | 2011-12-30 | 2012-06-27 | 中联重科股份有限公司 | Cantilever crane backward tilting prevention device, control method thereof and crawler crane |
| WO2013013414A1 (en) * | 2011-07-28 | 2013-01-31 | 长沙中联重工科技发展股份有限公司 | Derrick tower crane and anti-tipping device thereof |
| CN112723203A (en) * | 2020-12-28 | 2021-04-30 | 中联重科股份有限公司 | Control method and device for anti-back-tilting oil cylinder of arm support and engineering machinery |
-
2010
- 2010-09-25 CN CN2010205443376U patent/CN201801334U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102408073A (en) * | 2010-09-25 | 2012-04-11 | 徐州重型机械有限公司 | Crane and anti-tipback cylinder thereof |
| CN102408073B (en) * | 2010-09-25 | 2014-04-09 | 徐州重型机械有限公司 | Crane and anti-tipback cylinder thereof |
| WO2013013414A1 (en) * | 2011-07-28 | 2013-01-31 | 长沙中联重工科技发展股份有限公司 | Derrick tower crane and anti-tipping device thereof |
| CN102502408A (en) * | 2011-10-20 | 2012-06-20 | 中联重科股份有限公司 | Hydraulic crane amplitude-variation rebound defect control system and automobile crane |
| CN102425201A (en) * | 2011-11-30 | 2012-04-25 | 北京市三一重机有限公司 | Back-tilting-preventing moment limiter for arm support |
| CN102515043A (en) * | 2011-12-30 | 2012-06-27 | 中联重科股份有限公司 | Cantilever crane backward tilting prevention device, control method thereof and crawler crane |
| CN112723203A (en) * | 2020-12-28 | 2021-04-30 | 中联重科股份有限公司 | Control method and device for anti-back-tilting oil cylinder of arm support and engineering machinery |
| CN112723203B (en) * | 2020-12-28 | 2022-08-05 | 中联重科股份有限公司 | Control method and device for anti-back-tilting oil cylinder of arm support and engineering machinery |
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