CN203063916U - Telescopic type supporting leg device and cantilever-crane-class engineering machinery equipment - Google Patents
Telescopic type supporting leg device and cantilever-crane-class engineering machinery equipment Download PDFInfo
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- CN203063916U CN203063916U CN 201220703121 CN201220703121U CN203063916U CN 203063916 U CN203063916 U CN 203063916U CN 201220703121 CN201220703121 CN 201220703121 CN 201220703121 U CN201220703121 U CN 201220703121U CN 203063916 U CN203063916 U CN 203063916U
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Abstract
The utility model relates to a telescopic type supporting leg device and cantilever-crane-class engineering machinery equipment. The telescopic type supporting leg device comprises a supporting leg box, a primary telescopic supporting leg, a secondary telescopic supporting leg, a twins telescopic oil cylinder and a supporting oil cylinder, and further comprises a dragging chain system arranged inside the secondary telescopic supporting leg, wherein a cylinder end of a primary telescopic oil cylinder and a cylinder end of a secondary telescopic oil cylinder of the twins telescopic oil cylinder are both fixed inside the primary telescopic supporting leg and are communicated, a piston rod end of the primary telescopic oil cylinder is fixed inside the supporting leg box, a piston rod end of a secondary telescopic oil cylinder is fixed inside the secondary telescopic supporting leg, the dragging chain system comprises a dragging chain and a linkage pipeline arranged inside the dragging chain, a fixed end of the dragging chain is fixed inside the supporting leg box, a movable end of the dragging chain is fixed inside the secondary telescopic supporting leg, the linkage pipeline inside the dragging chain comprises a first hydraulic rubber pipe, and one end of the first hydraulic rubber pipe is connected with a rod cavity of the secondary telescopic oil cylinder. The telescopic type supporting leg device is capable of guaranteeing the reliability of a moving pipeline, and brings convenience to the installation of the telescopic type supporting leg device.
Description
Technical field
The utility model relates to engineering machinery field, relates in particular to a kind of telescopic leg device and jib class engineering mechanical device.
Background technology
At present, often need during such as jib class engineering mechanical device operations such as wheel crane, concrete pump trucks foldable arm rack is launched, stretches out, and can turn an angle, this mode of operation can bring two problems: the one, and jib stretches out out-shift of gravity center and causes car load to be tumbled; The 2nd, the vibrations during the car load operation, the weight of lifting can cause pressing the fatal accident of quick-fried tire.
In order to solve this two problems, often around vehicle frame, install support leg device additional on this class construction machinery and equipment at present, support leg device is connected on the vehicle frame by modes such as bearing pins.A kind of telescopic leg device is arranged in the support leg device, generally formed by fixed supporting leg, telescopic outrigger, wherein fixed supporting leg is connected on the vehicle frame by modes such as bearing pins, telescopic outrigger adds mode such as rope, and to drive in the casing of fixed supporting leg level flexible by hydraulic ram, motor, and telescopic outrigger is terminal simultaneously installs vertical oil cylinder.
Before the car load work, at first the telescopic outrigger device is arranged certain angle or stretched out from vehicle frame around bearing pin, the telescopic outrigger level is stretched out then, and the terminal vertical oil cylinder of last telescopic outrigger stretches out props up car load, and tire is liftoff.After jib stretches out, around dropping on, the car load center of gravity within the line at the vertical oil cylinder of supporting leg center, can not tumble during the car load operation.At present, the supporting leg telescoping mechanism adopts hose reel and twins' flexible pipe to be used to realize the motion of the flexible and support oil cylinder of the order of multi-stage expansion supporting leg more.Specifically referring to Fig. 1, supporting leg moves under the effect of twins' telescopic oil cylinder device a1, and the cylinder barrel among twins' telescopic oil cylinder device a1 moves with telescopic outrigger, and twins' sebific duct planker a3 is fixed on the supporting leg, is used for supporting twins' sebific duct a4.Twins' sebific duct planker a3 and twins' sebific duct a4 move with supporting leg together when supporting leg moves, enter twins' telescopic oil cylinder device a1 behind twins' sebific duct a4 in the logical motion of hydraulic oil and the sequence valve assembly a7, realize that under the effect of sequence valve assembly a7 the order of twins' telescopic oil cylinder device a1 is stretched out and the order withdrawal.When the supporting leg fore and aft motion, the flexible pipe among the hose reel a5 can move with supporting leg through guide wheel assemblies a6, and hydraulic oil arrives vertical oil cylinder through hose reel a5 with vertical cylinder pipe a2, makes vertical oil cylinder realize motion.
In existing supporting leg telescoping mechanism, hose reel and twins' flexible pipe are used, twins' flexible pipe is installed between one-level telescopic outrigger and the secondary telescopic outrigger, narrow space, add the one-level telescopic outrigger and the secondary telescopic outrigger has relative motion, like this to leg structure spare processing request height, leg structure spare belongs to the casing weldment, post welding distortion is difficult to avoid, and car load in use for some time leg structure spare stress deformation also be difficult to avoid, these factors all can improve the fault rate of twins' flexible pipe.
In addition, hose reel relies on self spring force realization withdrawal, during installation predetermincd tension will be arranged, and the size of this predetermincd tension has strict requirement, therefore to the installation requirement height of hose reel, if the predetermincd tension setting is improper, also cause the fault rate of hose reel to increase easily.And twins' flexible pipe and hose reel fault rate height directly cause the unreliable of supporting leg telescopic system.
The utility model content
The purpose of this utility model is to propose a kind of telescopic leg device and jib class engineering mechanical device, can guarantee the reliability of motion pipeline, and make things convenient for the telescopic leg Unit Installation.
For achieving the above object, the utility model provides a kind of telescopic leg device, comprise supporting leg case, one-level telescopic outrigger, secondary telescopic outrigger, twins' telescopic oil cylinder and support oil cylinder, described secondary telescopic outrigger is arranged in the described one-level telescopic outrigger, described one-level telescopic outrigger is arranged in the described supporting leg case, described support oil cylinder is fixed on the end of described secondary telescopic outrigger, wherein also comprises: be arranged on the drag chain system in the described secondary telescopic outrigger;
Described twins' telescopic oil cylinder comprises one-level telescopic oil cylinder and secondary telescopic oil cylinder, the cylinder barrel end of described one-level telescopic oil cylinder and the cylinder barrel end of secondary telescopic oil cylinder all are fixed in the described one-level telescopic outrigger, and the cylinder barrel end of the cylinder barrel end of described one-level telescopic oil cylinder and secondary telescopic oil cylinder communicates;
The rod end of described one-level telescopic oil cylinder is fixed in the described supporting leg case, and the rod end of described secondary telescopic oil cylinder is fixed in the described secondary telescopic outrigger;
Described drag chain system comprises drag chain and is placed on interlock pipeline in the described drag chain, the fixed end of described drag chain is fixed in the described supporting leg case, the movable end of described drag chain is fixed in the described secondary telescopic outrigger, be synchronized with the movement with described secondary telescopic outrigger, the interlock pipeline in the described drag chain comprises first hydralic hose that an end is connected with the rod chamber of described secondary telescopic oil cylinder.
Further, the hydraulic fluid port of the rod end of described secondary telescopic oil cylinder communicates with the rod chamber of described secondary telescopic oil cylinder, and the rod end of described one-level telescopic oil cylinder has two hydraulic fluid ports, communicates with rod chamber and the rodless cavity of described one-level telescopic oil cylinder respectively.
Further, also be in series with back pressure valve between the cylinder barrel end of described one-level telescopic oil cylinder and the cylinder barrel end of described secondary telescopic oil cylinder, described one-level telescopic outrigger is stretched out earlier, stretch out behind the described secondary telescopic outrigger.
Further, also comprise T-pipe joint, the other end of described first hydralic hose is connected with described T-pipe joint, between rod end and the hydraulic fluid port that rod chamber communicates of described T-pipe joint and described one-level telescopic oil cylinder, also be in series with one way sequence valve, can make the withdrawal earlier of described secondary telescopic outrigger, withdraw behind the described one-level telescopic outrigger.
Further, the interlock pipeline in the described drag chain also comprises two hydralic hoses that stretch out and withdraw of controlling described support oil cylinder respectively.
Further, the movable end of described drag chain also is provided with the pipe clamp of the interlock pipeline in the fixing described drag chain.
Further, also comprise the drag chain motion bracing or strutting arrangement that supports described drag chain, described drag chain motion bracing or strutting arrangement comprises planker, the support on the cylinder body that is fixed on described one-level telescopic oil cylinder and is arranged on the interior roller of described support.
Further, also be provided with the anti-clamping stagnation hard tube that passes through for described drag chain at the edge of described support and planker.
Further, also comprise hand change over valve, two hydraulic fluid ports of described hand change over valve communicate with oil-feed oil circuit and the oil return circuit of system respectively, and in addition two hydraulic fluid ports of described hand change over valve communicate with the hydraulic fluid port that communicates with rodless cavity of the rod end of described T-pipe joint and described one-level telescopic oil cylinder respectively.
Based on technique scheme, the utility model telescopic leg device has adopted the drag chain system to protect the hydralic hose of motion, and the drag chain system is arranged in the secondary telescopic outrigger, cancelled the existing twins' flexible pipe that is arranged between one-level telescopic outrigger and the secondary telescopic outrigger, the problem that this breaks down because of leg structure spare post welding distortion and stress deformation easily with regard to twins' flexible pipe of having been avoided moving in the narrow space between the supporting leg, guarantee the reliability of motion pipeline, also reduced the processing request to leg structure spare; The drag chain system also need not to apply predetermincd tension when mounted than existing hose reel, therefore installs easily, is convenient to safeguard.
In another embodiment, the hydraulic fluid port of the rod end of described secondary telescopic oil cylinder communicates with the rod chamber of described secondary telescopic oil cylinder, the rod end of described one-level telescopic oil cylinder has two hydraulic fluid ports, communicates with rod chamber and the rodless cavity of described one-level telescopic oil cylinder respectively.By the mode that piston rod and piston at telescopic oil cylinder arrange hydraulic fluid port, make existing two cover moving channels be reduced to a cover by the moving channel of drag chain system protection, therefore greatly improved the reliability of whole supporting leg stretching structure.
In another embodiment, also be in series with back pressure valve between the cylinder barrel end of described one-level telescopic oil cylinder and the cylinder barrel end of described secondary telescopic oil cylinder, described one-level telescopic outrigger is stretched out earlier, stretch out behind the described secondary telescopic outrigger.The piston rod that the rodless cavity that utilizes back pressure valve can make the hydraulic oil of lower pressure be introduced into the one-level telescopic oil cylinder promotes in the one-level telescopic oil cylinder stretches out, driving the one-level telescopic outrigger of fixing with the cylinder barrel end of one-level telescopic oil cylinder stretches out from the supporting leg case, when the one-level telescopic oil cylinder reaches, the pressure of hydraulic oil raises, when reaching the setting pressure of back pressure valve, can open back pressure valve, at this moment hydraulic oil arrives the rodless cavity of secondary telescopic oil cylinder by back pressure valve, the piston rod that promotes again in the secondary telescopic oil cylinder stretches out, drive the secondary telescopic outrigger of fixing with the rod end of secondary telescopic oil cylinder and from the one-level telescopic outrigger, stretch out, thereby the sequencing of realizing one-level telescopic outrigger and secondary telescopic outrigger stretches out process.
In another embodiment, also comprise T-pipe joint, the other end of described first hydralic hose is connected with described T-pipe joint, between rod end and the hydraulic fluid port that rod chamber communicates of described T-pipe joint and described one-level telescopic oil cylinder, also be in series with one way sequence valve, can make the withdrawal earlier of described secondary telescopic outrigger, withdraw behind the described one-level telescopic outrigger.Utilize T-pipe joint and one way sequence valve can make the hydraulic oil of lower pressure enter the rod chamber of secondary telescopic oil cylinder earlier by T-pipe joint, promote the piston rod withdrawal in the secondary telescopic oil cylinder, drive with the secondary telescopic oil cylinder the fixing secondary telescopic outrigger of rod end in the one-level telescopic outrigger, withdraw, when the secondary telescopic oil cylinder is reduced to, the pressure of hydraulic oil raises, when reaching the setting pressure of one way sequence valve, can open one way sequence valve, at this moment hydraulic oil arrives the rod chamber of one-level telescopic oil cylinder by one way sequence valve from T-pipe joint, promote the piston rod withdrawal in the one-level telescopic oil cylinder again, drive the one-level telescopic outrigger of fixing with the cylinder barrel end of one-level telescopic oil cylinder and in the supporting leg case, withdraw, thus the sequencing of realization secondary telescopic outrigger and one-level telescopic outrigger withdrawal process.
In another embodiment, the interlock pipeline in the described drag chain also comprises two hydralic hoses that stretch out and withdraw of controlling described support oil cylinder respectively.Utilize drag chain can also carry the control oil circuit of the support oil cylinder of the end that is fixed on the secondary telescopic outrigger, than existing hose reel structure, the installation and maintenance of drag chain structure is more easy, also can improve the reliability of support oil cylinder control.
In another embodiment, the movable end of described drag chain also is provided with the pipe clamp of the interlock pipeline in the fixing described drag chain.Pipe clamp can be used for fixing many interlock pipelines in the drag chain, avoids these interlock pipelines in the inner distortion of drag chain together, influences the motion of drag chain system.
In another embodiment, also comprise the drag chain motion bracing or strutting arrangement that supports described drag chain, described drag chain motion bracing or strutting arrangement comprises planker, the support on the cylinder body that is fixed on described one-level telescopic oil cylinder and is arranged on the interior roller of described support.Consider that self there is the problem of slump in the drag chain system, utilize drag chain motion bracing or strutting arrangement can support drag chain motion thereon, avoid the drag chain system in motion process, to be subjected to the influence of self slump.
In another embodiment, also be provided with the anti-clamping stagnation hard tube that passes through for described drag chain at the edge of described support and planker.Anti-clamping stagnation hard tube can be used for preventing that the drag chain system from being damaged by the wedge angle seamed edge scratch of support and planker in motion process.
In another embodiment, also comprise hand change over valve, two hydraulic fluid ports of described hand change over valve communicate with oil-feed oil circuit and the oil return circuit of system respectively, and in addition two hydraulic fluid ports of described hand change over valve communicate with the hydraulic fluid port that communicates with rodless cavity of the rod end of described T-pipe joint and described one-level telescopic oil cylinder respectively.Utilize hand change over valve can manually control simple to operate and safety to the expanding-contracting action of telescopic leg device.
For achieving the above object, the utility model provides a kind of jib class engineering mechanical device, has aforesaid telescopic leg device.
The advantage of telescopic leg device has been described in the front, and the jib class engineering mechanical device that therefore has aforementioned telescopic leg device has also possessed motion pipeline reliability height accordingly, is convenient to advantages such as installation.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present utility model, constitutes the application's a part, and illustrative examples of the present utility model and explanation thereof are used for explaining the utility model, do not constitute improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 is the structural representation of existing telescopic outrigger device.
Fig. 2 is the deployed condition scheme drawing of an embodiment of the utility model telescopic leg device.
Fig. 3 is the contraction state scheme drawing of Fig. 2 embodiment.
Fig. 4 is the principle schematic of the hydraulic efficiency pressure system of the utility model telescopic leg device embodiment.
Reference numeral: a1-twins' telescopic oil cylinder device, a2-vertical cylinder pipe, a3-twins' sebific duct planker, a4-twins' sebific duct, a5-hose reel, a6-guide wheel assemblies, a7-sequence valve assembly, A-secondary telescopic outrigger, B-one-level telescopic outrigger, C-supporting leg case, D-support oil cylinder, 1-twins telescopic oil cylinder, a-secondary telescopic oil cylinder, b-one-level telescopic oil cylinder, 2-drag chain system, 3-back pressure valve, the fixed end of 4-drag chain, 5-one way sequence valve, 6-bearing pin, the flexible pipeline of 7-the first order, 8-pipe clamp, interlock pipeline in 9-drag chain, the flexible pipeline of 10-the second order, 11-planker, 12-roller, 13-support, the movable end of 14-drag chain, 15-anti-clamping stagnation hard tube, 16-T-pipe joint, 17 hydraulic tubings.
The specific embodiment
Below by drawings and Examples, the technical solution of the utility model is described in further detail.
As shown in Figures 2 and 3, be respectively deployed condition and the contraction state scheme drawing of an embodiment of the utility model telescopic leg device.In the present embodiment, the telescopic leg device comprises supporting leg case C, one-level telescopic outrigger B, secondary telescopic outrigger A, twins' telescopic oil cylinder 1 and support oil cylinder D.Secondary telescopic outrigger A is arranged in the one-level telescopic outrigger B, and one-level telescopic outrigger B is arranged in the supporting leg case C, and support oil cylinder D is fixed on the end of secondary telescopic outrigger A.In secondary telescopic outrigger A, also be provided with drag chain system 2.
Twins' telescopic oil cylinder 1 comprises one-level telescopic oil cylinder b and secondary telescopic oil cylinder a, and the cylinder barrel end of the cylinder barrel end of one-level telescopic oil cylinder b and secondary telescopic oil cylinder a all is fixed in the one-level telescopic outrigger B by bearing pin 6.The cylinder barrel end of the cylinder barrel end of one-level telescopic oil cylinder b and secondary telescopic oil cylinder a can be realized being communicated with by the seamless tube of cylinder barrel outer wall welding.The rod end of one-level telescopic oil cylinder b is fixed in the supporting leg case C by bearing pin 6, and the rod end of secondary telescopic oil cylinder a is fixed in the secondary telescopic outrigger A by bearing pin 6.One-level telescopic oil cylinder b is responsible for promoting the motion of one-level telescopic outrigger B, secondary telescopic outrigger A and support oil cylinder D, move distance is the stroke of one-level telescopic oil cylinder, secondary telescopic oil cylinder a is responsible for promoting the motion of secondary telescopic outrigger A and support oil cylinder D, and move distance is the stroke of secondary telescopic oil cylinder.
Compare with existing supporting leg telescoping mechanism, present embodiment does not adopt the structure of twins' flexible pipe, and the drag chain system of bearing hydraulic sebific duct is arranged in the secondary telescopic outrigger, this is arranged between a secondary telescopic outrigger because post welding distortion or stress deformation are extruded or pull the problem of damage easily with regard to having been avoided hydralic hose, has also reduced the processing request to leg structure spare.The drag chain system need not predetermincd tension when mounted as the motion pipeline, therefore than the existing hose reel that adopts, drag chain system installation requirement is lower, the higher fault rate that has caused when also having avoided adopting hose reel improper because predetermincd tension arranges, and then make the telescopic leg device of present embodiment have higher reliability.
In conjunction with hydraulic schematic diagram shown in Figure 4, can see, the hydraulic fluid port of the rod end of secondary telescopic oil cylinder a communicates with the rod chamber of secondary telescopic oil cylinder a, and the rod end of one-level telescopic oil cylinder b has two hydraulic fluid ports, and rod chamber and the rodless cavity with one-level telescopic oil cylinder b communicates respectively.Hydraulic oil can be by being fixed on the supporting leg case the rod end of one-level telescopic oil cylinder enter into rod chamber and the rodless cavity of one-level telescopic oil cylinder; and two telescopic oil cylinders are fixing each other; and be provided with the external pipeline of connection between both cylinder barrel ends; thereby make hydraulic oil can enter into the rodless cavity of secondary telescopic oil cylinder by this external world's pipeline; in practical work process; since two telescopic oil cylinders stretch out and withdrawal action only can have influence on the motion of the hydralic hose that the rod end of secondary telescopic oil cylinder is connected; therefore two cover motion pipelines that adopt than existing supporting leg telescoping mechanism; present embodiment has been simplified to the cover motion pipeline by the drag chain system protection, and this must make the reliability of whole supporting leg stretching structure improve greatly.
In Fig. 2, the back pressure valve 3 of can between the cylinder barrel end of the cylinder barrel end of one-level telescopic oil cylinder b and secondary telescopic oil cylinder a, connecting, be about to the cylinder barrel end hydraulic fluid port that back pressure valve 3 is fixed on secondary telescopic oil cylinder a, the flexible pipeline 10 of second order is fixed on the seamless tube of the cylinder barrel outside weldings that is communicated with the cylinder barrel end hydraulic fluid port of one-level telescopic oil cylinder b, and the flexible pipeline 10 of second order is connected with back pressure valve 3, does not have relative motion between the two.
In conjunction with the hydraulic schematic diagram of Fig. 4 as can be seen, the piston rod that the rodless cavity that utilizes back pressure valve can make the hydraulic oil of lower pressure be introduced into the one-level telescopic oil cylinder promotes in the one-level telescopic oil cylinder stretches out, driving the one-level telescopic outrigger of fixing with the cylinder barrel end of one-level telescopic oil cylinder stretches out from the supporting leg case, when the one-level telescopic oil cylinder reaches, the pressure of hydraulic oil raises, when reaching the setting pressure of back pressure valve, can open back pressure valve, at this moment hydraulic oil arrives the rodless cavity of secondary telescopic oil cylinder by back pressure valve, the piston rod that promotes again in the secondary telescopic oil cylinder stretches out, drive the secondary telescopic outrigger of fixing with the rod end of secondary telescopic oil cylinder and from the one-level telescopic outrigger, stretch out, thereby the sequencing of realizing one-level telescopic outrigger and secondary telescopic outrigger stretches out process.
In Fig. 2, can also comprise T-pipe joint 16, the other end of first hydralic hose is connected the one way sequence valve 5 of can also connecting between rod end and the hydraulic fluid port that rod chamber communicates of T-pipe joint 16 and one-level telescopic oil cylinder b with T-pipe joint 16.One way sequence valve 5 can be fixed on the supporting leg case C, and the 3rd joint of T-pipe joint 16 connects hydraulic circuit.
In conjunction with the hydraulic schematic diagram of Fig. 4 as can be seen, utilize T-pipe joint and one way sequence valve can make the hydraulic oil of lower pressure enter the rod chamber of secondary telescopic oil cylinder earlier by T-pipe joint, promote the piston rod withdrawal in the secondary telescopic oil cylinder, drive with the secondary telescopic oil cylinder the fixing secondary telescopic outrigger of rod end in the one-level telescopic outrigger, withdraw, when the secondary telescopic oil cylinder is reduced to, the pressure of hydraulic oil raises, when reaching the setting pressure of one way sequence valve, can open one way sequence valve, at this moment hydraulic oil arrives the rod chamber of one-level telescopic oil cylinder by one way sequence valve from T-pipe joint, promote the piston rod withdrawal in the one-level telescopic oil cylinder again, drive the one-level telescopic outrigger of fixing with the cylinder barrel end of one-level telescopic oil cylinder and in the supporting leg case, withdraw, thus the sequencing of realization secondary telescopic outrigger and one-level telescopic outrigger withdrawal process.
Interlock pipeline 9 in the drag chain can also comprise two hydralic hoses that stretch out and withdraw of controlling support oil cylinder D respectively except protecting first hydralic hose.These two hydralic hoses are connected to rod chamber and rodless cavity on the support oil cylinder D by drag chain, and this control oil circuit is independent of the flexible oil circuit of supporting leg, are used for controlling stretching out and withdrawing of support oil cylinder D.Than the structure of available technology adopting hose reel, the drag chain structure that present embodiment adopts is that installation or maintenance are all more easy, also can improve the reliability of support oil cylinder control.
Because what the utility model was mainly described is the supporting leg stretching structure, so the extension and contraction control process of support oil cylinder can just repeat no more here with reference to shown in Figure 4.
Consider the characteristics of drag chain system self, need in the telescopic leg device, increase the structure that some guarantee the normal operation of drag chain system, for example the pipe clamp 8 of the interlock pipeline 9 in the fixedly drag chain that the movable end 14 of drag chain arranges.Pipe clamp 8 can be used for fixing many interlock pipelines in the drag chain, avoids these interlock pipelines in the inner distortion of drag chain together, influences the motion of drag chain system.
Consider that self there is the problem of slump in the drag chain system, can increase the drag chain motion bracing or strutting arrangement that supports drag chain, drag chain motion bracing or strutting arrangement can comprise planker 11, the support 13 on the cylinder body that is fixed on one-level telescopic oil cylinder b and be arranged on the interior roller 12 of support.Drag chain slides in the space that the cylinder body of planker 11, support 13 and one-level telescopic oil cylinder b surrounds again, avoid drag chain because of the former of self slump thereby with the overlapping problem such as interfere of the interior wall friction of secondary telescopic outrigger or self, and the roller 12 that is arranged in the support 13 can help drag chain to move more smoothly, reduces friction.
For planker 11 and support 13, therefore drag chain may can also further be arranged the anti-clamping stagnation hard tube 15 that passes through for drag chain by the wedge angle seamed edge scratch of support 13 and planker 11 at the edge of support 13 and planker 11 through drag chain motion bracing or strutting arrangement the time.
In order to realize the flexible switching of the utility model telescopic leg device, can adopt hand change over valve to realize, the hand change over valve E among Fig. 4 for example, and the hand change over valve F among Fig. 4 is used for switching stretching out and the action of withdrawing of support oil cylinder.
In conjunction with Fig. 2-principle of work of the utility model telescopic leg device that illustrates embodiment illustrated in fig. 4, as follows:
When needs stretch out the telescopic leg device, operate hand change over valve E downwards, hand change over valve E switches to right position, the hydraulic fluid port that hydraulic oil is communicated with rodless cavity through one-level telescopic oil cylinder piston rod place by hand change over valve E arrives the rodless cavity of one-level telescopic oil cylinder, at this moment hydraulic oil can act on the back pressure valve of connection through the hydraulic fluid port of one-level telescopic oil cylinder cylinder barrel position, because back pressure valve has setting pressure, so when hydraulic fluid pressure is low, can not pass through back pressure valve, and only can promote the one-level telescopic oil cylinder piston rod is stretched out, because rod end is fixed on the supporting leg case, so the one-level telescopic oil cylinder can drive and its fixing one-level telescopic outrigger, secondary telescopic outrigger in the one-level telescopic outrigger and the support oil cylinder of secondary telescopic outrigger end are protruding.
After the one-level telescopic oil cylinder reaches head fully, hydraulic fluid pressure raises, when reaching the setting pressure of back pressure valve, can open back pressure valve, at this moment, hydraulic oil arrives the rodless cavity of secondary telescopic oil cylinder by back pressure valve, the piston rod that promotes in the secondary telescopic oil cylinder stretches out, and drives with the support oil cylinder of the fixing secondary telescopic outrigger of its rod end and end protruding.In addition, in conjunction with the hydraulic principle of Fig. 4, can realize stretching out and withdrawal of support oil cylinder by operation hand change over valve F, just no longer in detail its process has been described in detail here.
When needs withdrawal telescopic leg device, upwards operate hand change over valve E, hand change over valve E switches to position, a left side, hydraulic oil acts on the rod chamber of one way sequence valve and secondary telescopic oil cylinder by hand change over valve E and T-pipe joint, because one way sequence valve has setting pressure, so hydraulic oil arrives earlier the rod chamber of secondary telescopic oil cylinder, promote the piston rod withdrawal of secondary telescopic oil cylinder, and drive with the fixing secondary telescopic outrigger of its rod end and the support oil cylinder of end and inwardly withdraw.
After the secondary telescopic oil cylinder is all withdrawn, hydraulic fluid pressure raises, when reaching the setting pressure of one way sequence valve, can open one way sequence valve, at this moment, hydraulic oil arrives the rod chamber of one-level telescopic oil cylinder by one way sequence valve, promote the piston rod withdrawal of one-level telescopic oil cylinder, drive the one-level telescopic outrigger fixing with it, the secondary telescopic outrigger in the one-level telescopic outrigger and the support oil cylinder of secondary telescopic outrigger end and inwardly withdraw.
In the process of stretching out and withdrawing of above-mentioned telescopic leg device, in conjunction with Fig. 2, Fig. 3, the operational process of drag chain system is as follows: the fixed end of drag chain is called for short the R end for stationary end R(), the movable end of drag chain is called for short the M end for tache motorice M().The R end is fixed on the supporting leg case C, remains static for car load, and the M end is fixed on the secondary telescopic outrigger A, is kept in motion for car load.
The telescopic leg device is done when stretching out action, one-level telescopic outrigger B, secondary telescopic outrigger A, at first the M end of drag chain system 2 moves with the cylinder barrel one of one-level telescopic oil cylinder b, be fixed on the planker 11 on the cylinder barrel of one-level telescopic oil cylinder b, support 13 and roller 12 are also followed the motion of one-level telescopic oil cylinder b cylinder barrel together, move distance is one-level telescopic oil cylinder b stroke L1, after one-level telescopic oil cylinder b stretches out fully, one-level telescopic outrigger B, the cylinder barrel of one-level telescopic oil cylinder b, planker 11, support 13 and roller devices 12 stop motions, secondary telescopic oil cylinder a begins to stretch out then, the M end that drives secondary telescopic outrigger A and drag chain system 2 continues motion, move distance is secondary telescopic oil cylinder a stroke L2, so total move distance L=L1+L2 of drag chain system; When the telescopic leg device is done when action withdrawal, whole motion process and supporting leg do stretch out when moving opposite, repeated description not.
The explanation of the operational process by top structure to the utility model telescopic leg device embodiment, principle of work, drag chain system, can see that the utility model telescopic leg has the following advantages:
1, whole supporting leg retractor device is installed in secondary telescopic outrigger case inside, has cancelled the twins' flexible pipe between one-level telescopic outrigger and the secondary telescopic outrigger, has therefore reduced the processing request to one-level telescopic outrigger and secondary telescopic outrigger;
2, adopt the drag chain system to replace hose reel, do not need to apply predetermincd tension during installation, therefore convenient the installation is easy to safeguard;
3, hydraulic fluid port arrangement and the supporting leg of twins' telescopic oil cylinder of Cai Yonging do not have relative motion; simplified pipeline; replace two in the existing hose reel retractor device to overlap the motion pipelines with a cover motion pipeline, and carry out the protection of motion pipeline by the drag chain system, so the reliability height.
Telescopic leg device of the present utility model goes for all kinds of jib class engineering mechanical devices, possesses motion pipeline reliability height equally, is convenient to advantages such as installation and maintenance.
Should be noted that at last: above embodiment is only in order to illustrate that the technical solution of the utility model is not intended to limit; Although with reference to preferred embodiment the utility model is had been described in detail, those of ordinary skill in the field are to be understood that: still can make amendment or the part technical characterictic is equal to replacement the specific embodiment of the present utility model; And not breaking away from the spirit of technical solutions of the utility model, it all should be encompassed in the middle of the technical scheme scope that the utility model asks for protection.
Claims (10)
1. telescopic leg device, comprise supporting leg case, one-level telescopic outrigger, secondary telescopic outrigger, twins' telescopic oil cylinder and support oil cylinder, described secondary telescopic outrigger is arranged in the described one-level telescopic outrigger, described one-level telescopic outrigger is arranged in the described supporting leg case, described support oil cylinder is fixed on the end of described secondary telescopic outrigger, it is characterized in that, also comprise: be arranged on the drag chain system in the described secondary telescopic outrigger;
Described twins' telescopic oil cylinder comprises one-level telescopic oil cylinder and secondary telescopic oil cylinder, the cylinder barrel end of described one-level telescopic oil cylinder and the cylinder barrel end of secondary telescopic oil cylinder all are fixed in the described one-level telescopic outrigger, and the cylinder barrel end of the cylinder barrel end of described one-level telescopic oil cylinder and secondary telescopic oil cylinder communicates;
The rod end of described one-level telescopic oil cylinder is fixed in the described supporting leg case, and the rod end of described secondary telescopic oil cylinder is fixed in the described secondary telescopic outrigger;
Described drag chain system comprises drag chain and is placed on interlock pipeline in the described drag chain, the fixed end of described drag chain is fixed in the described supporting leg case, the movable end of described drag chain is fixed in the described secondary telescopic outrigger, be synchronized with the movement with described secondary telescopic outrigger, the interlock pipeline in the described drag chain comprises first hydralic hose that an end is connected with the rod chamber of described secondary telescopic oil cylinder.
2. telescopic leg device according to claim 1, it is characterized in that, the hydraulic fluid port of the rod end of described secondary telescopic oil cylinder communicates with the rod chamber of described secondary telescopic oil cylinder, the rod end of described one-level telescopic oil cylinder has two hydraulic fluid ports, communicates with rod chamber and the rodless cavity of described one-level telescopic oil cylinder respectively.
3. telescopic leg device according to claim 2, it is characterized in that, also be in series with back pressure valve between the cylinder barrel end of described one-level telescopic oil cylinder and the cylinder barrel end of described secondary telescopic oil cylinder, described one-level telescopic outrigger is stretched out earlier, stretch out behind the described secondary telescopic outrigger.
4. telescopic leg device according to claim 3, it is characterized in that, also comprise T-pipe joint, the other end of described first hydralic hose is connected with described T-pipe joint, between rod end and the hydraulic fluid port that rod chamber communicates of described T-pipe joint and described one-level telescopic oil cylinder, also be in series with one way sequence valve, can make the withdrawal earlier of described secondary telescopic outrigger, withdraw behind the described one-level telescopic outrigger.
5. telescopic leg device according to claim 1 is characterized in that, the interlock pipeline in the described drag chain also comprises two hydralic hoses that stretch out and withdraw of controlling described support oil cylinder respectively.
6. telescopic leg device according to claim 5 is characterized in that, the movable end of described drag chain also is provided with the pipe clamp of the interlock pipeline in the fixing described drag chain.
7. according to the arbitrary described telescopic leg device of claim 4-6, it is characterized in that, also comprise the drag chain motion bracing or strutting arrangement that supports described drag chain, described drag chain motion bracing or strutting arrangement comprises planker, the support on the cylinder body that is fixed on described one-level telescopic oil cylinder and is arranged on the interior roller of described support.
8. telescopic leg device according to claim 7 is characterized in that, also is provided with the anti-clamping stagnation hard tube that passes through for described drag chain at the edge of described support and planker.
9. telescopic leg device according to claim 4, it is characterized in that, also comprise hand change over valve, two hydraulic fluid ports of described hand change over valve communicate with oil-feed oil circuit and the oil return circuit of system respectively, and in addition two hydraulic fluid ports of described hand change over valve communicate with the hydraulic fluid port that communicates with rodless cavity of the rod end of described T-pipe joint and described one-level telescopic oil cylinder respectively.
10. a jib class engineering mechanical device is characterized in that, has the arbitrary described telescopic leg device of claim 1 ~ 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220703121 CN203063916U (en) | 2012-12-19 | 2012-12-19 | Telescopic type supporting leg device and cantilever-crane-class engineering machinery equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220703121 CN203063916U (en) | 2012-12-19 | 2012-12-19 | Telescopic type supporting leg device and cantilever-crane-class engineering machinery equipment |
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| Publication Number | Publication Date |
|---|---|
| CN203063916U true CN203063916U (en) | 2013-07-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220703121 Expired - Fee Related CN203063916U (en) | 2012-12-19 | 2012-12-19 | Telescopic type supporting leg device and cantilever-crane-class engineering machinery equipment |
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| CN (1) | CN203063916U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103010180A (en) * | 2012-12-19 | 2013-04-03 | 徐工集团工程机械股份有限公司 | Telescopic support leg device and arm support type engineering machinery equipment |
| CN105776055A (en) * | 2016-05-23 | 2016-07-20 | 徐工集团工程机械股份有限公司 | Cantilever crane installing and supporting device and cantilever crane assembling method |
-
2012
- 2012-12-19 CN CN 201220703121 patent/CN203063916U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103010180A (en) * | 2012-12-19 | 2013-04-03 | 徐工集团工程机械股份有限公司 | Telescopic support leg device and arm support type engineering machinery equipment |
| CN105776055A (en) * | 2016-05-23 | 2016-07-20 | 徐工集团工程机械股份有限公司 | Cantilever crane installing and supporting device and cantilever crane assembling method |
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