CN103601099B - A kind of folding arm type hydraulic elevating platform - Google Patents
A kind of folding arm type hydraulic elevating platform Download PDFInfo
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- CN103601099B CN103601099B CN201310624456.0A CN201310624456A CN103601099B CN 103601099 B CN103601099 B CN 103601099B CN 201310624456 A CN201310624456 A CN 201310624456A CN 103601099 B CN103601099 B CN 103601099B
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Abstract
The present invention discloses a kind of folding arm type hydraulic elevating platform, comprises platform, base, at least 3 pairs by the lifting folding arm of the Polygons arrangement at least with three limits, and corresponding supporting liter lifts hydro-cylinder and hydraulic balance system; Balanced hydraulic system comprises upper strata balance hydraulic cylinder and lower floor's balance hydraulic cylinder; Upper strata balance hydraulic cylinder respectively with the lower hinge of platform and upper folding arm; Oil circuit head and the tail between each adjacent upper balance hydraulic cylinder are connected, and all upper stratas balance hydraulic cylinder forms the oil circuit closed; Lower floor's balance hydraulic cylinder respectively with the upper articulation of base and lower folding arm; Oil circuit head and the tail between each adjacent lower balance hydraulic cylinder are connected, and all lower floors balance hydraulic cylinder forms the oil circuit closed; Oil outlet and the oil-in of upper strata balance hydraulic cylinder and lower floor's balance hydraulic cylinder are changed mutually with lifting action. The balanced hydraulic system of the present invention does not need external hydraulic efficiency oil to do power resources, with the balance hydraulic cylinder synchronous interaction of layer, reaches the object of platform in balance stable elevation.
Description
Technical field
The present invention relates to hydraulic lifting machinery, particularly relate to a kind of folding arm type hydraulic elevating platform.
Background technology
At present, known hydraulic elevating platform mainly contains the types such as the direct elevating platform of hydro-cylinder, fork hydraulic lifting platform, double-cylinder type cursor slide lifting gantry and single arm type folding arm lifting gantry.
It is strong that the direct elevating platform of hydro-cylinder rises act ability, and lift is subject to hydro-cylinder limitation of length, is suitable for the industry lifting operation of subtable face, short stroke, fixed location, unsuitable working aloft.
Fork hydraulic lifting platform plays rise and is greater than the direct elevating platform of hydro-cylinder, can be used for the mobile operatings such as carrying, installation, maintenance. Being limit based on features such as the distinctive mechanism action mode of scissor-type lifting platform, anatomical connectivity modes, its lifting arm lengths utilization ratio is lower, along with the increase, equipment integral rigidity and the platform stabilization rapid reduction that increase and rise rise of the lifting arm combination number of plies. Due to by structure influence, the lifting of equipment material, manufacturing process and precision, for its integral rigidity and stability without basic improvement.
Double-cylinder type cursor slide lifting gantry and scissor-type lifting platform similar nature, have the features such as lifting arm lengths utilization ratio, equipment integral rigidity and high-altitude stability are low equally.
Single arm type folding arm lifting gantry adjustable height is big, lifting arm lengths utilization ratio height, but bearing capacity, integral rigidity, platform stabilization are low, is suitable for the ascend a height liter of maintenance or lightweight product of carrying personnel and lifts, installs operation.
The above existing all kinds of lifting gantry all can not meet simultaneously lift big, rises act power greatly, equipment integral rigidity height, high-altitude good stability and be convenient to the over-all properties requirement of movement.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of folding arm type hydraulic elevating platform.
In order to solve the problems of the technologies described above, the technical solution used in the present invention is: a kind of folding arm type hydraulic elevating platform, comprise platform, base, at least 3 pairs by the lifting folding arm of the Polygons arrangement at least with three limits, and corresponding supporting liter lifts hydro-cylinder and balance hydraulic efficiency system;
The shape of base and platform and the spread geometry of folding arm are suitable;
Platform is positioned at the top of base, and platform is connected and composed by lifting folding arm and base can lifting gantry;
Lifting folding arm comprises folding arm and lower folding arm; The upper end thereof of platform and upper folding arm, the lower end of base and lower folding arm is hinged; The lower end of upper folding arm and the upper end thereof of lower folding arm;
The lower end and the base that rise act hydro-cylinder are hinged, rise the lower hinge of upper end and the upper folding arm lifting hydro-cylinder;
Balanced hydraulic system comprises upper strata balance hydraulic cylinder and lower floor's balance hydraulic cylinder;
The cylinder cylinder end of upper strata balance hydraulic cylinder and platform are hinged, the piston-rod end of upper strata balance hydraulic cylinder and the lower hinge of upper folding arm; Upper strata balance hydraulic cylinder comprises oil outlet and oil-in; Oil outlet is connected by hydraulicefficiency pipe with the oil-in of adjacent upper strata balance hydraulic cylinder, oil-in then oil outlet with another adjacent upper strata balance hydraulic cylinder connected by hydraulicefficiency pipe; Oil circuit head and the tail between each adjacent upper balance hydraulic cylinder are connected, and all upper stratas balance hydraulic cylinder forms the oil circuit closed;
The cylinder cylinder end of lower floor's balance hydraulic cylinder and base are hinged, the piston-rod end of lower floor's balance hydraulic cylinder and the upper articulation of lower folding arm; Lower floor's balance hydraulic cylinder comprises oil outlet and oil-in; Oil outlet is connected by hydraulicefficiency pipe with the oil-in of adjacent lower floor's balance hydraulic cylinder, oil-in then oil outlet with another adjacent lower floor's balance hydraulic cylinder connected by hydraulicefficiency pipe; Oil circuit head and the tail between each adjacent lower balance hydraulic cylinder are connected, and all lower floors balance hydraulic cylinder forms the oil circuit closed;
The oil outlet of upper strata balance hydraulic cylinder and lower floor's balance hydraulic cylinder and oil-in are changed mutually with the lifting action of upper and lower folding arm;
Upper strata balance hydraulic cylinder and lower floor's balance hydraulic cylinder are two rod hydro-cylinder; With two rod hydro-cylinders of layer, there is identical cylinder diameter and bar footpath.
As preferably, 3 secondary lifting folding arms are by rounded projections arranged; The wrap direction that lifting folding arm is arranged is all clockwise direction or counterclockwise or center radiation shape.
As preferably, 4 secondary lifting folding arms are by rectangular arranged; The wrap direction that lifting folding arm is arranged is all clockwise direction or counterclockwise or two relatively or two contrary or center radiation shapes.
As preferably, the upper folding arm of lifting folding arm has identical projecting length on vertical section; The lower folding arm of described lifting folding arm has identical projecting length on vertical section.
As preferably, upper strata balance hydraulic cylinder also comprises venting port, and venting port is provided with vent valve; Lower floor's balance hydraulic cylinder also comprises venting port, and venting port is provided with vent valve.
As preferably, the bottom of the upper end folding arm upper with adjacent two rising act hydro-cylinder is hinged by the lifting hinge bar lengthened, and the lower end and the base that rise act hydro-cylinder are hinged.
As preferably, balance hydraulic cylinder is two rod hydro-cylinders; With each balance hydraulic cylinder of layer and there is identical cylinder diameter and bar footpath.
As preferably, being consistent with layer balance hydraulic cylinder two ends with the articulated position of platform, base, folding arm.
The invention has the beneficial effects as follows:
Balanced hydraulic system does not need external hydraulic efficiency oil to do power resources. It is connected successively with oil-in with the balance hydraulic cylinder oil outlet in layer, forms independent, a closed hydraulic system connected by hydraulicefficiency pipeline. Make the balance hydraulic cylinder synchronous interaction of same layer, reach the object of platform in balance stable elevation.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
Fig. 1 is the counterclockwise in the same way bendable lifting gantry raised configuration schematic diagram of three column types of folding arm type hydraulic elevating platform embodiment of the present invention.
Fig. 2 is the counterclockwise in the same way bendable lifting gantry collapsed state schematic diagram of three column types of folding arm type hydraulic elevating platform embodiment of the present invention.
Fig. 3 is the counterclockwise in the same way bendable lifting gantry raised configuration schematic diagram of multi-column type 4 post of folding arm type hydraulic elevating platform embodiment of the present invention.
Fig. 4 is the counterclockwise in the same way bendable lifting gantry collapsed state schematic diagram of multi-column type 4 post of folding arm type hydraulic elevating platform embodiment of the present invention.
Fig. 5 is the lifting folding arm subtend bending lifting gantry raised configuration schematic diagram of folding arm type hydraulic elevating platform embodiment of the present invention.
Fig. 6 is three column type superposed combined type lifting gantry raised configuration schematic diagram of folding arm type hydraulic elevating platform embodiment of the present invention.
Figure marks, 1-base, 2-platform, folding arm under 3-, the upper folding arm of 4-, 5-rises and lifts hydro-cylinder, 6-lower floor balance hydraulic cylinder, 7-upper strata balance hydraulic cylinder, and 8-lengthens hinge bar, 9-balance hydraulic cylinder hydraulic power line, 10-vent valve, 11-platform hinge, 12-folding arm hinge, 13-rises and lifts hydro-cylinder hinge.
Embodiment
One, according to different user demands, lifting gantry can be designed as following several types:
1) three column type lifting gantrys are as shown in Figure 1. It is characterized in:
The secondary lifting folding arms of use three, wherein go up folding arm 4 and lower folding arm 3 is combined as a secondary folding arm;
Folding arm can be single column folding arm, it is possible to think built-up type folding arm;
Subtend or side direction folding arm mode can be adopted, wherein side direction folding arm mode floor space minimum (Fig. 2);
Platform 2 and base 1 are the trilateral suitable with folding arm arrangement mode;
The folding arm quantity of three column type lifting gantrys is few, area occupied is little, lifting efficiency height, realizes bigger lift by less base area, has higher cost performance.
2) feature of multi-column type lifting gantry (Fig. 3,4) is:
For requiring there is bigger workplatform area or/and relatively promotion lift ability user demand, for convenience of manufacture, transport, installation and maintenance, maintenance, the mode of prefabricated structure unit, on-the-spot splicing assembling can be adopted, it is assembled into modular component by prefabricated for the parts comprising folding arm, balance hydraulic cylinder, liter act hydro-cylinder and hinge, and base and workplatform are created the change modular component that can supply splicing, by in-site installation, connection line, it is possible to realize the manufacture of such relatively large lifting gantry, transport and assembling easily. The type lifting gantry is characterized in:
There are 4 secondary above folding arms, and design can be needed to increase folding arm quantity according to use;
Folding arm can be single column, it is possible to think built-up type;
According to base form and load assignment feature, it is possible to flexible design adopts subtend, side direction, tiltedly side direction or the mode such as irregular, random to arrange that each folding arm is folded to, to make full use of area and space;
By the assembling parts of modularization, it is possible to increase folding arm quantity, increasing workplatform area, raising easily rises act power.
3) to folding lifting gantry (Fig. 5). It is characterized in:
Rectangle workplatform and the Active workings being suitable for restricted width, is characterized in:
Having four secondary folding arms, the two secondary folding arm subtends adjacent with one end tilt, and by the interconnection of folding arm hinge axostylus axostyle;
Folding arm can be split type single-column folding arm, it is also possible to be built-up type folding arm;
On lifting table long axis direction, two ends folding arm subtend folds;
By adopting folding arm hinge axostylus axostyle to lengthen and reinforced structure, corresponding minimizing act hydro-cylinder quantity can be risen;
Lifting hydro-cylinder, balance hydraulic cylinder quantity by increasing the folding arm connected in pairs along workplatform long axis direction and rise, workplatform long axis direction can lengthen easily, and can provide bigger and rise act power;
This type lifting gantry has extremely high lateral stability and non-deformability.
4) combined type lifting platform is as shown in Figure 6. It is characterized in:
Due to by conditionalities such as material, manufacturing process, manufacturing cost, transportation, installation and use environment, its lift of individual layer lifting gantry is restricted, for the service requirements that each side such as maneuvering ability, lift, stability, charge capacity are higher, present invention encompasses combined type lifting platform, the feature of this combined type lifting platform is:
Adopt two or more individual layer lifting gantrys to erect to assemble to superposition, with the base of the top workplatform of lower floor's lifting gantry as upper lifting platform, assemble upper lifting platform on this basis, and multiple layer up-down platform can be upwards installed successively, form combined type lifting platform;
By the folding arm of bottom lifting gantry, the action control cable of liter act hydraulic power line and line solenoid valve is caused upper strata hydraulic elevating platform, it is achieved each layer lifting gantry in top is risen the control lifting hydro-cylinder oil supply line.
Rise and hoist by orlop platform when lifting operation, folding decline from the superiors' platform during decline.
After increasing multilayer platform floor, combination hydraulic lifting gantry has higher integral rigidity and stability.
Erecting to combination assembling by multi-layer hydraulic lifting gantry, the lower base of same size can realize higher lift and bigger rise act power, and be applicable to motor-driven operation.
Two, integral part:
Above-mentioned folding type hydraulic lifting gantry is risen by the platform 2 on the base 1 of bottom, top, lower floor and lifts folding arm (lower folding arm 3), upper strata rises and lifts folding arm (upper folding arm 4), platform hinge 11, folding arm hinge 12, rises and lift hydro-cylinder 5, rise and lift hydro-cylinder hinge 13, rise and lift hinge, upper strata balance hydraulic cylinder 7, lower floor's balance hydraulic cylinder hinge 6, and hydraulic power line and accessory, hydraulic shunting, collection stream element and Hydraulic Station composition.
Three, anatomical connectivity feature:
1) platform 2 on top and lower base 1 are connected in hinged way by upper folding arm 4 and lower folding arm 3, upper folding arm 4 is fixed on the bottom surface of platform 2 by platform hinge 11, lower folding arm 3 is fixed on above base 1 by platform hinge, and the pin jointed end of upper and lower folding arm can be rotated by platform hinge.
2) the lower end of upper folding arm is hinged one to one respectively with the upper end of lower folding arm by folding arm hinge 12, and when upper and lower folding arm rotates along platform hinge, folding arm hinge is with place upper and lower folding arm together action.
3) act hydro-cylinder hinge 13 is connected with base by rising to rise act hydro-cylinder 5 one end, and the other end lifts stud connection with liter. Rising act hydro-cylinder hinge is arranged on the base of bottom, rises act power for improving and reaches liter best cost effectiveness lifting hydro-cylinder, rises and lift hinge Design Orientation in the bottom of upper folding arm 4.
4) by with liter lift the mode that is articulated and connected of hinge side, each rises lifts hydro-cylinder and can connect a secondary lifting folding arm, and the folding arm up and down of every secondary lifting folding arm connects a balance hydraulic cylinder.
5) rising the upper folding arm lifted hydro-cylinder and can connect the secondary lifting folding arm in left and right two simultaneously, by lengthening, hinge bar 8 upper folding arm secondary with the two of the right and left is connected (Fig. 5) in its upper end, and the liter constituting T-shaped lifts structure.
In addition, it is also possible to respectively by upper folding arm and upper folding arm, lower folding arm and lower folding arm by be connected and fixed and reinforcing structure and make upper and lower folding arm form the integrally-built combination folding arm of combined type, it is possible to respectively or share a balance hydraulic cylinder.
6) after the cylinder cylinder end of lower floor's balance hydraulic cylinder 6 connects length, passing downwardly through balance hydraulic cylinder stud connection and be installed on base 1, the piston-rod end of other end is installed on lower folding arm 3 top by balance hydraulic cylinder stud connection; After the cylinder cylinder end of upper strata balance hydraulic cylinder 7 connects length, upwards it is installed on platform 2 by balance hydraulic cylinder stud connection, the piston-rod end of other end is installed on upper folding arm bottom by balance hydraulic cylinder stud connection, and each balance hydraulic cylinder hinge is all fixed on it and installs position up and down.
7) it is interconnected (i.e. interconnection between interconnection, upper strata balance hydraulic cylinder 7 between lower floor's balance hydraulic cylinder 6) by hydraulicefficiency pipeline with the balance hydraulic cylinder in layer. Namely the oil outlet of each balance hydraulic cylinder is connected by hydraulicefficiency pipe with the oil-in of a same layer adjacent balance hydraulic cylinder, oil-in then oil outlet with another adjacent balance hydraulic cylinder of same layer connected by hydraulicefficiency pipe, in cylinder body and pipeline, fill hydraulic efficiency oil and after emptying gas, with the balance hydraulic cylinder in layer by interconnection, form independent, the closed hydraulic efficiency system of, by the expanding-contracting action of balance hydraulic cylinder, the hydraulic efficiency oil in system does the flowing of two-way limited cycle.
8) hydraulic separate adfluxion stream element is installed on base, and the total interface tube after collection stream is connected to Hydraulic Station by hydraulic power line, and each shunting mouth is lifted hydraulic cylinder oil inlet by hydraulic power line with each liter respectively and is connected.
Four, the function of each major parts:
1) upper and lower lifting folding arm: connect base and workplatform, it is provided that lifting spatial altitude and load support.
2) act hydro-cylinder is risen: rise act power by promoting liter act hinge to provide.
3) hydraulic separate adfluxion stream element: shunt fuel feeding and the oil return collection stream being used as hydraulic efficiency oil, it is not necessary to accurate shunting.
4) balanced hydraulic oil cylinder: for action form, the linkage constraint of action amplitude of each folding arm of upper and lower layer; guarantee that same layer folding arm rotates and angle of inclination whole process keeps corresponding consistent in real time; avoid lifting gantry in lifting action, starting and stopping or keeping the process of height, due to each folding arm in same layer along platform hinge rotate angle generation difference and cause platform side tiltedly, topple.
Balance hydraulic cylinder also plays resists side direction thrust under various lift in height state, the anti-effect rocking, keeping lifting gantry integral rigidity.
Five, the action mechanism of each parts:
1) base: be the base part of hydraulic elevating platform, can be installed on the sole plate of fixed venue or trailer, motor vehicle chassis on.
2) lifting folding arm: by along folding arm hinge peace table-hinges axle rotating opening, stretch and rotate backward amount to realize lifting gantry liter lift, support and decline. The action of lifting folding arm is subject to liter lifting a driving for hydro-cylinder, its folding, lifting and rise act hydraulic cylinder extension action and synchronously carry out.
3) liter act hydro-cylinder: for by shortening cylinder body length optimization mechanical structure, improve liter act strength, reduce manufacturing cost and be convenient to installation, stringing. Rising act hydro-cylinder adopts piston rod pipe core to enter oil assembled hydraulic cylinder, and pipe core enters oil by piston-rod end. The liter that piston rod is connected and installed in base correspondence position by end earrings is lifted on hydro-cylinder hinge, and cylinder body is upwards installed with a liter act stud connection.
When entering oil, outer cylinder block protrudes upward at first, drives upper and lower folding arm to open, and workplatform rises, and the outer cylinder block spacing rear internal layer cylinder body of arrival continues and stretches out. During cut-off in-line, cylinder body stops stretching out and keeps extrusion, and folding arm opening action stops, and workplatform stops rising and keeps height.
Fuel cut-off and after opening in-line, cylinder body automatically declines from top retraction under the effect of platform deadweight and load weight, internal layer cylinder body is first regained, then it is that outer cylinder block is regained, hydraulic efficiency oil in cylinder body is back in Hydraulic Station oil storage case along in-line, meanwhile, folding arm amounts to action, and workplatform declines;
4) balance hydraulic cylinder: balance hydraulic cylinder employing pair goes out rod-type hydro-cylinder, and there is piston rod at its piston two ends, it is possible to do bidirectional-movement in cylinder body, and cylinder body two ends are with hydraulic efficiency oil interface and venting port. Equal with layer balance hydraulic cylinder cylinder diameter, two ends piston rod equal diameters. Piston rod is wherein provided with connecting lug and hinged by balance hydraulic cylinder hinge and folding arm in one end, and the piston rod of the other end is polished rod, only plays occupy-place effect in cylinder body, to ensure on any position of stroke, discharges equal with the hydraulic efficiency oil volume entered in cylinder body. With polished rod with one end cylinder body connect long after earrings is installed and hinged by balance hydraulic cylinder hinge and platform.
Balance hydraulic cylinder does not need external hydraulic efficiency oil to do power resources. it is connected successively with oil-in with the balance hydraulic cylinder oil outlet in layer, forms independent, a closed hydraulic system connected by hydraulicefficiency pipeline successively head and the tail. when one of them balance hydraulic cylinder action, its hydraulic efficiency oil discharged must enter another balance hydraulic cylinder being adjacent by pipeline, owing to each cylinder is two rod hydro-cylinder, and there is identical cylinder diameter and bar footpath, therefore, the hydraulic efficiency oil that displacement cylinder is discharged, its volume having, the adjacent balance hydraulic cylinder causing oil circuit to be attached thereto is occurred the same action of same length, simultaneously, adjacent balance hydraulic cylinder also can by the hydraulic efficiency oil self discharging same volume, and by pipeline, this hydraulic efficiency oil all injected the adjacent balance hydraulic cylinder that its next oil circuit is attached thereto, and then cause next balance hydraulic cylinder to produce same action. owing to same layer balance hydraulic cylinder has closed hydraulic oil pipeline, and cushioning pocket is there is not because filling hydraulic efficiency oil, therefore, the first balance hydraulic cylinder of generation action, is injected the hydraulic efficiency oil equal with its withdrawal volume by the same layer balance hydraulic cylinder adjacent from its most simultaneously.
According to this feature, if having any one balance hydraulic cylinder can not synchronous follow-up, then all cannot action with layer balance hydraulic cylinder; Only linking together with the whole balance hydraulic cylinder of layer, just have the action of each balance hydraulic cylinder, therefore, in system, any one balance hydraulic cylinder does not have unusual action. Driving when being subject to external force, hydraulic efficiency oil produces synchronous flowing according to the expanding-contracting action mode of cylinder body, and each cylinder keeps synchronous interaction, and its action stretch mode, collapsing length, action speed are completely the same.
Between same layer balance hydraulic cylinder, synchronous interaction is the action mode of unique feasible, and any one balance hydraulic cylinder all cannot make unusual action.
In lifting platform action process, the folding of folding arm causes the lifting of platform, and the folding link balance hydro-cylinder of folding arm is flexible, and the expanding-contracting action of balance hydraulic cylinder and lifting action synchronously carry out.Owing to all same layer balance hydraulic cylinders form strict linkage constraint each other, in formation time and spatially completely the same action mode, action amplitude and action process, any single balance hydraulic cylinder wherein all cannot in company with place folding arm self contained function. The linkage binding characteristic of balance hydraulic cylinder constitutes the relative uniformity of platform with layer folding arm action, show as at any time, in the action process of any mode, platform with layer folding arm its rotate angle, open-close ways and resting state keep completely the same, thereby, it is ensured that platform will occur folding arm otherness to tilt because of the difference of folding arm folding angle in any action, cause workplatform side direction crooked or topple.
For improving lifting gantry stability, the folding arm of this hydraulic elevating platform has certain introversion after being designed to rise to limit height, show trapezoidal solids outward appearance, because having the framework of this kind of trapezoidal solids structure formation, without the need to special reinforcing, namely lifting gantry itself has good integral rigidity, possesses that superior shearing resistance is cut, antitorque dynamic, anti-rocked, non-deformability and extremely high stability.
Six, the motion characteristic of lifting gantry:
1) flat sleeping original state:
Lifting gantry is when carrying out the original state before liter act, and folding arm is closed state, rises act hydro-cylinder and regains completely, balance hydraulic cylinder is in shortest length, and minimum altitude is down to by lifting gantry, and workplatform and base are opposing parallel, now to take space minimum for lifting gantry, is convenient to carrying, mobile.
2) act state is risen:
Hydraulic efficiency oil is squeezed into a liter act hydro-cylinder by flow distributing and collecting element by hydraulic workstation, hydro-cylinder outer cylinder block starts to protrude upward, drive to rise and lift hinge, the upwards action of upper folding arm, upper folding arm drives lower folding arm upwards action together, upper and lower folding arm is along platform hinge rotating opening, being opened by folding arm hinge between upper and lower folding arm, workplatform produces to rise movement and does simultaneously. In action process, because being subject to the linkage constraint of balance hydraulic cylinder, upper strata and lower floor's balance hydraulic cylinder limit upper and lower folding arm and rotation angle completely the same in same layer and action amplitude occur respectively, workplatform is keeping rising in the state parallel with base, except highly changing, top workplatform and lower base in the horizontal direction relative position remain unchanged.
3) limit height state:
Putting in place constantly when a liter act hydro-cylinder internal layer cylinder body stretches out completely, upper and lower folding arm is opened completely, and is in the parallel state of major axis, and lifting gantry arrives vertex, now ends hydraulic efficiency oil fuel feeding main pipe rail, fuel cut-off. If hydraulic efficiency oil fuel feeding main pipe rail keeps closing, cut-off hydraulic efficiency oil backflow, lifting gantry will remain on maximum height state.
4) decline state:
Fuel cut-off also opens fuel feeding main pipe rail, under deadweight effect, rise act hydro-cylinder will first bounce back by internal layer cylinder body, the hydraulic efficiency oil of cylinder body starts to be back to Hydraulic Station oil storage case via oil supply line, upper and lower folding arm starts bending, workplatform height decreases, and balance hydraulic cylinder links shortening simultaneously. Finally, upper and lower folding arm forms closed state again, and workplatform is reduced to minimum altitude, and platform decline process stops.
5) height state in the middle of:
Rising at lifting gantry and lift or in decline process, end fuel feeding house steward, platform is by height when being in stopping, and keeps highly constant.
6) other:
Lifting gantry, in lifting process and under stopping state, comprising any height place the highest, lower-most point, remains parallel state between the workplatform on upper strata and lower base, the relative position in the two horizontal direction remains constant.
The hydraulic efficiency system that lifting gantry rises movement power for providing can only use an oil supply line, and fuel feeding, oil return use with pipe, do not set up used oil pipe so that dynamic hydraulic system structure is simple.
Oil supply system does not need the flow distributing and collecting element of high precision, it is only necessary to simply realizing along separate routes, collect and flow, rise in act process, balance hydraulic cylinder lifts the oil inlet quantity of hydro-cylinder by each liter of synchronous interaction volitional check.
Above-described embodiment of the present invention, does not form limiting the scope of the present invention. Any amendment, equivalent replacement and improvement etc. done within the spirit and principles in the present invention, all should be included within the claims of the present invention.
Claims (7)
1. a folding arm type hydraulic elevating platform, comprises platform, base, at least 3 pairs by the lifting folding arm of the Polygons arrangement at least with three limits, and corresponding supporting liter lifts hydro-cylinder and balance hydraulic efficiency system;
The shape of described base and platform and the spread geometry of folding arm are suitable;
Described platform is positioned at the top of base, and described platform is connected and composed by lifting folding arm and base can lifting gantry;
Described lifting folding arm comprises folding arm and lower folding arm; The upper end thereof of described platform and upper folding arm, the lower end of described base and lower folding arm is hinged; The lower end of described upper folding arm and the upper end thereof of lower folding arm;
Lower end and the base of described liter act hydro-cylinder are hinged, rise the lower hinge of upper end and the upper folding arm lifting hydro-cylinder;
It is characterized in that:
Described balanced hydraulic system comprises upper strata balance hydraulic cylinder and lower floor's balance hydraulic cylinder;
The cylinder cylinder end of described upper strata balance hydraulic cylinder and platform are hinged, the piston-rod end of described upper strata balance hydraulic cylinder and the lower hinge of upper folding arm; Described upper strata balance hydraulic cylinder comprises oil outlet and oil-in; Described oil outlet is connected by hydraulicefficiency pipe with the oil-in of adjacent upper strata balance hydraulic cylinder, described oil-in then oil outlet with another adjacent upper strata balance hydraulic cylinder connected by hydraulicefficiency pipe; Oil circuit head and the tail between each adjacent upper balance hydraulic cylinder are connected, and all upper stratas balance hydraulic cylinder forms the oil circuit closed;
The cylinder cylinder end of described lower floor balance hydraulic cylinder and base are hinged, the piston-rod end of lower floor's balance hydraulic cylinder and the upper articulation of lower folding arm; Described lower floor balance hydraulic cylinder comprises oil outlet and oil-in; Described oil outlet is connected by hydraulicefficiency pipe with the oil-in of adjacent lower floor's balance hydraulic cylinder, described oil-in then oil outlet with another adjacent lower floor's balance hydraulic cylinder connected by hydraulicefficiency pipe; Oil circuit head and the tail between each adjacent lower balance hydraulic cylinder are connected, and all lower floors balance hydraulic cylinder forms the oil circuit closed;
The oil outlet of described upper strata balance hydraulic cylinder and lower floor's balance hydraulic cylinder and oil-in are changed mutually with the lifting action of upper and lower folding arm;
Described upper strata balance hydraulic cylinder and lower floor's balance hydraulic cylinder are two rod hydro-cylinder; With two rod hydro-cylinders of layer, there is identical cylinder diameter and bar footpath.
2. folding arm type hydraulic elevating platform according to claim 1, it is characterised in that, 3 secondary described lifting folding arms are by rounded projections arranged; The wrap direction that described lifting folding arm is arranged is all clockwise direction or counterclockwise or center radiation shape.
3. folding arm type hydraulic elevating platform according to claim 1, it is characterised in that, 4 secondary described lifting folding arms are by rectangular arranged; The wrap direction that described lifting folding arm is arranged is all clockwise direction or counterclockwise or two relatively or two contrary or center radiation shapes.
4. folding arm type hydraulic elevating platform according to claim 1, it is characterised in that, the upper folding arm of described lifting folding arm has identical projecting length on vertical section; The lower folding arm of described lifting folding arm has identical projecting length on vertical section.
5. folding arm type hydraulic elevating platform according to claim 1, it is characterised in that, described upper strata balance hydraulic cylinder also comprises venting port, and described venting port is provided with vent valve; Described lower floor balance hydraulic cylinder also comprises venting port, and described venting port is provided with vent valve.
6. folding arm type hydraulic elevating platform according to claim 1, it is characterised in that, the bottom of the upper end folding arm upper with adjacent two of described liter act hydro-cylinder is hinged by the lifting hinge bar lengthened, and lower end and the base of described liter act hydro-cylinder are hinged.
7. according to the folding arm type hydraulic elevating platform of claim 1-6 described in any one, it is characterised in that, the two ends of described same layer balance hydraulic cylinder are consistent with the articulated position of platform or base or folding arm.
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| CN113027839B (en) * | 2021-02-23 | 2023-08-18 | 武汉船用机械有限责任公司 | Hydraulic control system for large-tonnage lifting platform |
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| CN103601099A (en) | 2014-02-26 |
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