CN103603836A - Cage hydraulic control system and engineering vehicle - Google Patents
Cage hydraulic control system and engineering vehicle Download PDFInfo
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- CN103603836A CN103603836A CN201310626383.9A CN201310626383A CN103603836A CN 103603836 A CN103603836 A CN 103603836A CN 201310626383 A CN201310626383 A CN 201310626383A CN 103603836 A CN103603836 A CN 103603836A
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- 239000003921 oil Substances 0.000 claims abstract description 160
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 40
- 239000012530 fluid Substances 0.000 claims description 41
- 239000002828 fuel tank Substances 0.000 claims description 16
- 239000000446 fuel Substances 0.000 claims description 11
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 239000010729 system oil Substances 0.000 abstract description 3
- 230000008602 contraction Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 7
- 238000000034 method Methods 0.000 description 5
- 230000007423 decrease Effects 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 206010001541 Akinesia Diseases 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
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Abstract
The invention discloses a cage hydraulic control system and an engineering vehicle. An auxiliary oil cylinder (6) and an auxiliary oil cylinder circuit are additionally arranged in the system, the auxiliary oil cylinder is arranged between a rotary table (3) and a cantilever crane (2), and a reversing control valve (7) is arranged in the auxiliary oil cylinder circuit. At the first reversing position, a non-rod cavity and a rod cavity of the auxiliary oil cylinder are in hydraulic connection with a main oil return way (T) in the same time. At the second reversing position, the rod cavity of the auxiliary oil cylinder is connected with the main oil return way, and the non-rod cavity is connected with a main oil input way (P), so that hydraulic oil in the non-rod cavity of the auxiliary oil cylinder flows to a leveling oil cylinder (4). Meanwhile, the hydraulic oil in a non-rod cavity of an amplitude variation oil cylinder (5) passes through an oil return way (V) connected with the non-rod cavity to flow back to a system oil cylinder (10), and part of the hydraulic oil flows back to the rod cavity of the amplitude variation oil cylinder. Therefore, the cage hydraulic control system can level a cage in real time during the self-weight contraction of the cantilever crane without starting an emergency pump power unit, thereby saving energy consumption.
Description
Technical field
The present invention relates to the hydraulic control system in a kind of engineering vehicle, especially, relate to a kind of hydraulic control system for working bucket.
Background technique
In the various engineering vehicles such as aerial ladder truck, truck, high-altitude operation vehicle, working bucket is all installed, with the platform of standing as article carrying platform or operating personnel.On the turntable of engineering vehicle, be hinged with jib, jib carries out the motion of pivotable luffing with respect to turntable under the promotion of amplitude oil cylinder, drives the working bucket on the top that is hinged on jib hoist or decline.Working bucket hoist or decline process in, by leveling cyclinder, working bucket is carried out to leveling, make it to remain at horizontal position, in order to avoid the people who loads in working bucket or object are caused to adverse effect.
But, after luffing range of cantilever support launches, if the power plant of the Main Hydraulic Pump of Full Vehicle System or driving Main Hydraulic Pump break down and akinesia, need jib promptly to regain.On some engineering vehicles, direct current emergencypump has been installed for this reason, has been exchanged emergencypump or put-put etc. as the emergencypump device of power, to jib is regained smoothly, and emergencypump device provides power with real-time leveling working bucket for leveling cyclinder.Further, in order to save energy, the situation of the energy shortage of avoiding using for a long time emergencypump device simultaneously and causing occurs, utilize the self gravitation action principle of jib more conveniently, under jib Gravitative Loads, the hydraulic oil in the rodless cavity of compressing amplitude oil cylinder, makes it evenly to discharge oil sump tank, thereby reach the object that jib is reclaimed, i.e. so-called " jib deadweight is reclaimed ".Now, in jib deadweight callback course, working bucket is difficult to keep in real time level.If while being mounted with people or thing in working bucket, realize when jib deadweight is reclaimed and need to start very frequently emergencypump power unit with leveling working bucket, both had a strong impact on working efficiency, waste again the energy of power unit.
Summary of the invention
The object of this invention is to provide a kind of working bucket hydraulic control system and there is the engineering vehicle of this working bucket hydraulic control system, in jib deadweight callback course, can carry out real-time leveling and without starting emergencypump power unit to working bucket.
For achieving the above object, the invention provides a kind of working bucket hydraulic control system, wherein, described system comprises for described working bucket being carried out to leveling cyclinder and the leveling control loop of leveling, auxiliary cylinder and auxiliary cylinder loop and be respectively main oil-feed oil circuit and the main oil return circuit that each loop provides oil-feed and oil return, described auxiliary cylinder is installed as the jib connecting in described working bucket is conducted oneself with dignity while reclaiming, this auxiliary cylinder pressurized and make piston rod follow retraction, described auxiliary cylinder is provided with reversing control valve in loop, this reversing control valve has the first commutation position and the second commutation position, under described the first commutation position, the rodless cavity of described auxiliary cylinder and rod chamber while hydraulic connecting are to described main oil return circuit, under described the second commutation position, the rod chamber of described auxiliary cylinder is connected with described main oil return circuit and described rodless cavity is connected with described main oil-feed oil circuit, thus when the deadweight of described jib is reclaimed, can make hydraulic oil in described auxiliary cylinder by described leveling control loop to described leveling cyclinder fuel feeding with working bucket described in leveling.
Preferably, this system also comprises the first one-way valve, described auxiliary cylinder loop is connected on the first tie point in described main oil-feed oil circuit, described the first one-way valve is arranged in the described main oil-feed oil circuit part of described the first tie point one side, so that the described main oil-feed oil circuit part of the hydraulic oil in described auxiliary cylinder by described the first tie point opposite side flows to described leveling control loop.
Preferably, this system also comprises the first back pressure valve and system fuel tank, and described the first back pressure valve is arranged on being connected on oil circuit between described main oil return circuit and described system fuel tank.
Preferably, this system also comprises control unit and is arranged on the dip sensor in described working bucket, in described leveling control loop, be provided with leveling control valve group, this leveling control valve group comprises electric proportional control valve, and described control unit is for flowing to the hydraulic fluid flow rate of described leveling cyclinder with adjusting according to electric proportional control valve described in the SC sigmal control of described dip sensor.
Preferably, described leveling control valve group also comprises for limiting the relief valve of the fuel feeding oil pressure of described leveling control loop.
Preferably, described reversing control valve is the solenoid directional control valve of two four-ways, this solenoid directional control valve has the first hydraulic fluid port being connected with the rodless cavity of described auxiliary cylinder, the second hydraulic fluid port being connected with the rod chamber of described auxiliary cylinder, with the 3rd hydraulic fluid port of described main oil-feed oil circuit hydraulic connecting and with the 4th hydraulic fluid port of described main oil return circuit hydraulic connecting, at described the first commutation position, described the first hydraulic fluid port and the second hydraulic fluid port are communicated with respectively described the 4th hydraulic fluid port, and described the 3rd hydraulic fluid port cut-off, at described the second commutation position, described the first hydraulic fluid port is communicated with described the 3rd hydraulic fluid port, and described the second hydraulic fluid port is communicated with described the 4th hydraulic fluid port.
Preferably, this system also comprises the amplitude oil cylinder of described jib and is connected to the luffing control loop on described main oil-feed oil circuit and main oil return circuit;
Wherein, between the rodless cavity of described amplitude oil cylinder and system fuel tank, be connected with the other oil return circuit that connects of rodless cavity, this rodless cavity is other to be connect series connection in oil return circuit and is provided with switching control pilot and the second back pressure valve, and this switching control pilot and described rodless cavity between the second back pressure valve be other connects oil return circuit part by being provided with the rodless cavity that is connected amplitude oil cylinder described in oil circuit hydraulic connecting of the second one-way valve.
Preferably, other the connecing of the described rodless cavity between described switching control pilot and the second back pressure valve is also provided with throttle valve in oil return circuit part.
Preferably, the interlock of described switching control pilot and described reversing control valve is controlled so that described switching control pilot when opening described in reversing control valve switch to described the second commutation position.
In addition, the present invention also provides a kind of engineering vehicle, and this project vehicle comprises the working bucket hydraulic control system above-mentioned according to the present invention.
According to technique scheme, in working bucket hydraulic control system of the present invention, set up auxiliary cylinder and auxiliary cylinder loop and be connected to main oil-feed oil circuit and main oil return circuit, auxiliary cylinder is the same with amplitude oil cylinder to be arranged between jib and turntable, when jib works, the rod chamber of auxiliary cylinder is connected main oil return circuit with rodless cavity simultaneously, make the acting of auxiliary cylinder when following jib action minimum, when jib deadweight is reclaimed, the rod chamber of auxiliary cylinder is connected respectively main oil return circuit and main oil-feed oil circuit with rodless cavity, after hydraulic oil in rodless cavity is subject to jib gravity pressure, pressure raises, by main oil-feed oil circuit and leveling control loop, flow to leveling cyclinder, with real-time leveling working bucket.Simultaneously, the same pressurized of hydraulic oil in the rodless cavity of amplitude oil cylinder part flow back into amplitude oil cylinder rod chamber, part hydraulic oil connects oil return circuit by rodless cavity side and flows back to system oil cylinder, thereby can carry out real-time leveling and without starting emergencypump power unit, save energy consumption and reduce and control working bucket in jib deadweight callback course.
Other features and advantages of the present invention partly in detail are described the embodiment subsequently.
Accompanying drawing explanation
Accompanying drawing is to be used to provide a further understanding of the present invention, and forms a part for specification, is used from explanation the present invention, but is not construed as limiting the invention with embodiment one below.In the accompanying drawings:
Fig. 1 is the mounting structure schematic diagram according to the working bucket in the engineering vehicle of the preferred embodiment of the present invention and drive unit thereof;
Fig. 2 is that auxiliary cylinder is wherein in off working state according to the hydraulic schematic diagram of the working bucket hydraulic control system of the preferred embodiment of the present invention;
Roughly the same, the auxiliary cylinder that different is is wherein in running order for Fig. 3 and Fig. 2.
description of reference numerals
1 working bucket 2 jibs
3 turntable 4 leveling cyclinders
5 amplitude oil cylinder 6 auxiliary cylinders
7 reversing control valve 8 first one-way valves
9 first back pressure valve 10 system fuel tanks
11 leveling control valve group 12 leveling cyclinder equilibrium valve groups
13 luffing main operation valve 14 amplitude oil cylinder equilibrium valve groups
15 switching control pilot 16 throttle valve
17 second one-way valve 18 second back pressure valves
111 electric proportional control valve 112 first function modules
113 second function module 131 the 3rd function modules
The other oil return circuit that connects of 132 solenoid directional control valve V rodless cavities
The main oil return circuit of the main oil-feed oil circuit of P T
A1 first tie point A2 the second tie point
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is elaborated.Should be understood that, embodiment described herein only, for description and interpretation the present invention, is not limited to the present invention.
In the present invention, in the situation that not doing contrary explanation, the noun of locality of use typically refers to reference to upper and lower, left and right shown in the drawings as " upper and lower, left and right "; " inside and outside " refers to inside and outside with respect to the profile of each parts itself.The technical terms using in the present invention " jib deadweight is reclaimed " refers to after system Main Hydraulic Pump quits work, jib quits work, utilize the self gravitation of jib, make it to reclaim towards turntable luffing, and then the hydraulic oil in the rodless cavity of compressing amplitude oil cylinder, make it evenly to discharge oil sump tank, thereby reach the object of jib the automatic recovery.
Shown in Fig. 1 and Fig. 2, the invention provides a kind of working bucket hydraulic control system and there is the engineering vehicle of this working bucket hydraulic control system.Wherein, the working bucket 1 shown in Fig. 1 is articulated with on the top of jib 2, and the bottom of this jib 2 is articulated with on turntable 3.Working bucket hydraulic control system of the present invention comprises for working bucket 1 being carried out to leveling cyclinder 4 and leveling control loop, auxiliary cylinder 6 and the auxiliary cylinder loop of leveling and being respectively main oil-feed oil circuit P and the main oil return circuit T that each loop provides oil-feed and oil return.Wherein, the auxiliary cylinder 6 of setting up is set to its piston rod and can follows jib 2 deadweight recovery and bounce back, and the rodless cavity of this auxiliary cylinder 6 is compressed.As shown in Figure 1, when amplitude oil cylinder 5 is arranged between turntable 3 and jib 2, this auxiliary cylinder 6 is the same with amplitude oil cylinder 5 to be arranged between turntable 3 and jib 2, and the auxiliary cylinder 6 in Fig. 1 also can oppositely be installed certainly.When jib 2 is arm support component form, for example jib 2 comprises an arm and No. two arms, No. one arm comprises multi-stage telescopic arms, when No. two arms are articulated with on the epimerite telescopic boom of an arm, amplitude oil cylinder 5 and the auxiliary cylinder 6 of setting up all can be arranged between No. two arms and the epimerite telescopic boom of an arm, as long as in the time of can meeting jib the automatic recovery, the equal pressurized retraction of the piston rod of amplitude oil cylinder 5 and the auxiliary cylinder 6 of setting up.In auxiliary cylinder loop, be provided with reversing control valve 7, this reversing control valve 7 has the first commutation position and the second commutation position, and under the first commutation position (the left position in figure), the rodless cavity of auxiliary cylinder 6 and rod chamber while hydraulic connecting are to main oil return circuit T; Under the second commutation position (the right position in figure), the rod chamber of auxiliary cylinder 6 is connected with main oil return circuit T and rodless cavity is connected with main oil-feed oil circuit P, thus when " jib deadweight reclaim ", can make hydraulic oil in auxiliary cylinder 6 by leveling control loop to leveling cyclinder 4 fuel feeding with leveling working bucket 1.As total inventive concept, by setting up auxiliary cylinder 6 and auxiliary cylinder loop, in the process that makes to reclaim in jib deadweight, auxiliary cylinder 6 is compressed the samely with amplitude oil cylinder 5, hydraulic oil in auxiliary cylinder 6 can be supplemented to main oil-feed oil circuit P by auxiliary cylinder loop, and then by leveling control loop to leveling cyclinder 4 fuel feeding, make working bucket 1 obtain real-time leveling.With regard to the hydraulic oil of having realized between a plurality of oil cylinders, recycle like this, can automatic leveling working bucket 1, and without frequent starting emergencypump power unit, working bucket is carried out to leveling, save power source and avoid corresponding complicated switching controls.
As prerequisite, should design by physical dimension and the stroke of oil cylinder, the hydraulic oil in the rodless cavity of assurance auxiliary cylinder 6 can meet the leveling needs of leveling cyclinder 4.In present embodiment, in design, time guarantee that all the time the output quantity of the rodless cavity hydraulic oil of auxiliary cylinder 6 is slightly larger than the hydraulic oil demand of leveling cyclinder 4, for example, making output quantity is 1.1 to 1.3 times of demand, guarantee in the situation that hydraulic oil has a small amount of leakage, also can fuel feeding abundant.
In addition, although the oil pump that main oil-feed oil circuit P connects outlet generally can be provided for preventing the one-way valve that backflows to oil hydraulic pump etc., but more preferably, this working bucket hydraulic control system also preferably includes the first one-way valve 8, auxiliary cylinder loop is connected on the second tie point A2 of the first tie point A1 in main oil-feed oil circuit P and main oil return circuit T, the first one-way valve 8 is arranged in the main oil-feed oil circuit P part of the first tie point A1 mono-side, so that the main oil-feed oil circuit P part of the hydraulic oil in auxiliary cylinder 6 by the first tie point A1 opposite side flows to leveling control loop.Certainly, the first one-way valve 8 can also be such as electromagnetic switch valve etc., can realize above-mentioned effect equally.
Particularly, the reversing control valve 7 of setting up in present embodiment is preferably the solenoid directional control valve of two four-ways, this solenoid directional control valve has the first hydraulic fluid port being connected with the rodless cavity of auxiliary cylinder 6, the second hydraulic fluid port being connected with the rod chamber of auxiliary cylinder 6, with the 3rd hydraulic fluid port of main oil-feed oil circuit P hydraulic connecting and with the 4th hydraulic fluid port of main oil return circuit T hydraulic connecting, at the first commutation position, the first hydraulic fluid port and the second hydraulic fluid port are communicated with respectively the 4th hydraulic fluid port, and the 3rd hydraulic fluid port cut-off, at the second commutation position, the first hydraulic fluid port is communicated with the 3rd hydraulic fluid port, and the second hydraulic fluid port is communicated with the 4th hydraulic fluid port.By thering is the solenoid directional control valve of the spool of " Y " type function, can the above-mentioned switching controls of simple realization.As shown in Figure 2, the rod chamber of auxiliary cylinder 6 and rodless cavity all communicate with main oil return circuit T.When jib 2 upwards moves, auxiliary cylinder 6 is followed jib 2 actions and protruding, and the hydraulic oil in main oil return circuit T can add in the rodless cavity of auxiliary cylinder 6 in time; When jib 2 action downwards, auxiliary cylinder 6 is followed jib 2 actions and is bounced back, a hydraulic oil part in the rodless cavity of auxiliary cylinder 6 adds in rod chamber, unnecessary another part hydraulic oil flows back to system fuel tank 10 by main oil return circuit T, can guarantee that so the interior moment of auxiliary cylinder 6 is full of hydraulic oil, do not have emptying phenomenon, also do not have the phenomenon that builds the pressure, the action of auxiliary cylinder 6 only need consume a small amount of energy.
In addition, the working bucket hydraulic control system in present embodiment also preferably includes the first back pressure valve 9, and this first back pressure valve 9 is arranged on being connected on oil circuit between main oil return circuit T and system fuel tank 10.The setting of the first back pressure valve 9 can make when jib 2 normal operation, in main oil return circuit T, keep certain back pressure, in engineering vehicle, the hydraulic oil of the main oil return circuit T of auxiliary cylinder 6 that is arranged in the portion side of getting on the bus of vehicle is unlikely to flow back to completely because of self gravitation the system fuel tank 15 of the portion side of getting off.When jib 2 stops after action, the hydraulic oil being now connected in the rodless cavity of the auxiliary cylinder 6 in main oil return circuit T can not flow back in system oil case 10 under the effect of gravity, and then avoid when jib deadweight is reclaimed, be state shown in Fig. 3, the hydraulic pressure oil mass in the rodless cavity of auxiliary cylinder 6 can cannot be carried out leveling to working bucket 1 enough.
In leveling control loop, be generally provided with leveling control valve group 11 and leveling cyclinder equilibrium valve group 12 as shown in Figure 2.Wherein, the structure of leveling cyclinder equilibrium valve group 12 and effect are identical with the amplitude oil cylinder equilibrium valve group 14 of amplitude oil cylinder 5, include the first externally controlled type equilibrium valve and the second externally controlled type equilibrium valve that structure is identical, the first externally controlled type equilibrium valve is arranged on hydraulic connecting and connects in oil circuit and its pilot control oil circuit connects described rodless cavity and connects oil circuit to the rod chamber in the rod chamber of corresponding oil cylinder, and the second externally controlled type equilibrium valve is arranged on hydraulic connecting and connects in oil circuit and its pilot control oil circuit connects described rod chamber and connects oil circuit to the rodless cavity in the rodless cavity of corresponding oil cylinder.Each externally controlled type equilibrium valve comprises relief valve in parallel and one-way valve, and this one-way valve has reverse cut-off effect, and the fluid in locking rod chamber flows out automatically.
Working bucket hydraulic control system in present embodiment also comprises control unit and is arranged on the dip sensor (not shown) in working bucket 1, leveling control valve group 11 comprises electric proportional control valve 111, and control unit is for flowing to the hydraulic fluid flow rate of leveling cyclinder 4 with adjusting according to the SC sigmal control electric proportional control valve 111 of dip sensor.In the present embodiment, as shown in Figure 2, in leveling control valve group 11, generally also have and the second function module 113 of electric proportional control valve 111 cooperatings and other the first function module 112 etc., so control unit can be controlled electric proportional control valve 111 and in conjunction with the second function module 113 co-controllings, flow to the hydraulic fluid flow rate of leveling cyclinder 4.Control unit wherein can be independent control, also can comprise control wiring or control program etc.In addition, in leveling control valve group 11, also preferably include for limiting the relief valve (not shown) of the fuel feeding oil pressure of leveling control loop, in first function module 112 of this relief valve operated by rotary motion before electric proportional control valve 111.When the fuel feeding oil pressure of auxiliary cylinder 6 is excessive, can the relief valve pressure release from the first function module 112 overflow.It should be noted that, leveling control valve group 11 in present embodiment shown in Fig. 2 is common leveling control valve group, being arranged on the first function module 112 of electric proportional control valve 111 front and back and the structure of the second function module 113 consists of conventionally known to one of skill in the art, do not belong to main points of the present invention, thereby no longer launch carefully to state at this.
Leveling cyclinder 4 and leveling control loop and auxiliary cylinder 6 and auxiliary cylinder loop in working bucket hydraulic control system have more than been set forth, but as shown in Figure 1, the auxiliary cylinder 6 of setting up is identical with amplitude oil cylinder 5 mounting structures, and when jib 2 action, two oil cylinders stretch out simultaneously or bounce back.Below specifically set forth amplitude oil cylinder 5 and luffing control loop etc.
As shown in Figure 2, this working bucket hydraulic control system also comprise the amplitude oil cylinder 5 of jib 2 and be connected to main oil-feed oil circuit P and main oil return circuit T on luffing control loop; Amplitude oil cylinder 5 can be arranged between turntable 3 and jib 2, also can be arranged between an arm and No. two arms, has plurality of installation forms.Wherein, be connected with the other oil return circuit V that connects of rodless cavity between the rodless cavity of amplitude oil cylinder 5 and system fuel tank 10, other the connecing in oil return circuit V of this rodless cavity connected and is provided with switching control pilot 15 and the second back pressure valve 18.When jib 2 drives the normal luffing work of amplitude oil cylinder 5, by switching control pilot 15, control the other oil return circuit V that connects of this conducting rodless cavity of cut-off, amplitude oil cylinder 5 is connected with main oil return circuit T with main oil-feed oil circuit P by luffing control loop, controls the stretching of piston rod of amplitude oil cylinder 5.When system Main Hydraulic Pump quits work, when jib 2 needs deadweight to reclaim, now by switching control pilot 15, control the other oil return circuit V that connects of conducting rodless cavity, self gravitation effect due to jib 2, there is certain pressure in the hydraulic oil in the rodless cavity of amplitude oil cylinder 5, so the hydraulic oil in rodless cavity flows back to system fuel tank 10 by switching control pilot 15 back pressure that overcomes the second back pressure valve 18, amplitude oil cylinder 5 retractions, jib 2 reaches the object that deadweight is reclaimed.In order to prevent that jib 2 from reclaiming excessive velocities, in meeting oil return circuit V, rodless cavity side also increased throttle valve 16, and this throttle valve 16 is arranged on other the connecing in oil return circuit V part of rodless cavity between switching control pilot 15 and the second back pressure valve 18.By regulating the valve port opening size of this throttle valve 16, make the decline of jib 2 uniform and stable.
Meanwhile, in the retraction process of amplitude oil cylinder 5, in the rod chamber of amplitude oil cylinder 5, need to supplement in time hydraulic oil, otherwise can inhale sky, unfavorable to the use of hydraulic element.Therefore, as shown in Figure 2, switching control pilot 15 connects oil return circuit V part by being provided with the rod chamber that is connected oil circuit hydraulic connecting amplitude oil cylinder 5 of the second one-way valve 17 with the rodless cavity side between the second back pressure valve 18.Like this, a part for the hydraulic oil rodless cavity of amplitude oil cylinder 5 being flowed out is supplemented the rod chamber of supplying with amplitude oil cylinder 5.The existence of the second back pressure valve 18 makes other the connecing in oil return circuit V of rodless cavity have certain pressure, impels hydraulic oil to be preferentially supplemented to the rod chamber of amplitude oil cylinder 5, then just overcomes the second back pressure valve 18 and flows back to system fuel tank 10.
More than set forth according to the hydraulic structure of working bucket hydraulic control system of the present invention and working principle.Wherein, controls that should link of switching control pilot 15 and reversing control valve 7, so that reversing control valve 7 switches to the second commutation position when switching control pilot 15 control conducting.In other words, when system Main Hydraulic Pump quits work, when jib deadweight is reclaimed, the hydraulic oil pressurized in the rodless cavity of amplitude oil cylinder 5 and meet oil return circuit V and be back to system fuel tank 10 by rodless cavity is other, and be supplemented to the rod chamber of amplitude oil cylinder 5 simultaneously; And the same pressurized of hydraulic oil in the rodless cavity of auxiliary cylinder 6 and flow to main oil-feed oil circuit P, and then flow to leveling control loop, give leveling cyclinder 4 fuel feeding, so that working bucket 1 keeps level.
In the present invention, by the first back pressure valve 9 is set, when jib 2 stops after action, the hydraulic oil in the rodless cavity of auxiliary cylinder 6 can not flow back into the system fuel tank 10 in getting off under the effect of gravity.Like this, avoid reclaiming in jib deadweight, when reversing control valve 7 and switching control pilot 15 are switched to state shown in Fig. 3, the hydraulic oil quantity not sufficient in the rodless cavity of auxiliary cylinder 6 is to supply with leveling cyclinder 4 so that working bucket is carried out to leveling.It is emphasized that the output quantity of the hydraulic oil in the rodless cavity that should remain auxiliary cylinder 6 in design is slightly larger than the hydraulic oil demand of leveling cyclinder 4, even if guarantee in the situation that hydraulic oil has a small amount of leakage, also can fuel feeding abundant.The hydraulic oil that has more demand part, overflows by built-in relief valve in leveling control valve group 11, flows back to system fuel tank.Like this, both guaranteed that leveling cyclinder 4 has sufficient hydraulic oil to supply with, and to regulate working bucket 1 level, had guaranteed again the pressure security of hydraulic circuit.
Above-mentioned working bucket hydraulic control system according to the present invention may be used on aerial ladder truck, truck, high-altitude operation vehicle etc. to be had in the various engineering vehicle of working bucket, the real-time level that can keep working bucket, and saving energy consumption, avoids frequent starting emergencypump power unit.
Below describe by reference to the accompanying drawings the preferred embodiment of the present invention in detail; but; the present invention is not limited to the detail in above-mentioned mode of execution; within the scope of technical conceive of the present invention; can carry out multiple simple variant to technological scheme of the present invention, these simple variant all belong to protection scope of the present invention.
It should be noted that in addition, each concrete technical characteristics described in above-mentioned embodiment, in reconcilable situation, can combine by any suitable mode, for fear of unnecessary repetition, the present invention is to the explanation no longer separately of various possible compound modes.
In addition, between various mode of execution of the present invention, also can carry out combination in any, as long as it is without prejudice to thought of the present invention, it should be considered as content disclosed in this invention equally.
Claims (10)
1. a working bucket hydraulic control system, wherein, described system comprises for described working bucket (1) being carried out to the leveling cyclinder (4) and leveling control loop of leveling, auxiliary cylinder (6) is with auxiliary cylinder loop and be respectively main oil-feed oil circuit (P) and the main oil return circuit (T) that each loop provides oil-feed and oil return, described auxiliary cylinder (6) is installed as and makes when jib (2) deadweight being connected with described working bucket (1) is reclaimed, this auxiliary cylinder (6) pressurized and make piston rod follow retraction, in described auxiliary cylinder loop, be provided with reversing control valve (7), this reversing control valve (7) has the first commutation position and the second commutation position, under described the first commutation position, the rodless cavity of described auxiliary cylinder (6) and rod chamber simultaneously hydraulic connecting arrive on described main oil return circuit (T), under described the second commutation position, the rod chamber of described auxiliary cylinder (6) is connected with described main oil return circuit (T) and described rodless cavity is connected with described main oil-feed oil circuit (P), thus when described jib (2) deadweight is reclaimed, can make hydraulic oil in described auxiliary cylinder (6) by described leveling control loop to described leveling cyclinder (4) fuel feeding with working bucket described in leveling (1).
2. working bucket hydraulic control system according to claim 1, wherein, this system also comprises the first one-way valve (8), described auxiliary cylinder loop is connected on the first tie point (A1) in described main oil-feed oil circuit (P), described the first one-way valve (8) is arranged in described main oil-feed oil circuit (P) part of described the first tie point (A1) side, so that described main oil-feed oil circuit (P) part of the hydraulic oil in described auxiliary cylinder (6) by described the first tie point (A1) opposite side flows to described leveling control loop.
3. working bucket hydraulic control system according to claim 1, wherein, this system also comprises the first back pressure valve (9) and system fuel tank (10), and described the first back pressure valve (9) is arranged on being connected on oil circuit between described main oil return circuit (T) and described system fuel tank (10).
4. working bucket hydraulic control system according to claim 1, wherein, this system also comprises control unit and is arranged on the dip sensor in described working bucket (1), in described leveling control loop, be provided with leveling control valve group (11), this leveling control valve group (11) comprises electric proportional control valve (111), and described control unit is used for according to electric proportional control valve (111) described in the SC sigmal control of described dip sensor to regulate the hydraulic fluid flow rate that flows to described leveling cyclinder (4).
5. working bucket hydraulic control system according to claim 4, wherein, described leveling control valve group (11) also comprises for limiting the relief valve of the fuel feeding oil pressure of described leveling control loop.
6. working bucket hydraulic control system according to claim 1, wherein, described reversing control valve (7) is the solenoid directional control valve of two four-ways, this solenoid directional control valve has the first hydraulic fluid port being connected with the rodless cavity of described auxiliary cylinder (6), the second hydraulic fluid port being connected with the rod chamber of described auxiliary cylinder (6), with the 3rd hydraulic fluid port of described main oil-feed oil circuit (P) hydraulic connecting and with the 4th hydraulic fluid port of described main oil return circuit (T) hydraulic connecting, at described the first commutation position, described the first hydraulic fluid port and the second hydraulic fluid port are communicated with respectively described the 4th hydraulic fluid port, and described the 3rd hydraulic fluid port cut-off, at described the second commutation position, described the first hydraulic fluid port is communicated with described the 3rd hydraulic fluid port, and described the second hydraulic fluid port is communicated with described the 4th hydraulic fluid port.
7. according to the working bucket hydraulic control system described in any one in claim 1-6, wherein, this system also comprise the amplitude oil cylinder (5) of described jib (2) and be connected to described main oil-feed oil circuit (P) and main oil return circuit (T) on luffing control loop;
Wherein, between the rodless cavity of described amplitude oil cylinder (5) and system fuel tank (10), be connected with the other oil return circuit (V) that connects of rodless cavity, this rodless cavity is other to be connect series connection in oil return circuit (V) and is provided with switching control pilot (15) and the second back pressure valve (18), and this switching control pilot (15) and described rodless cavity side between the second back pressure valve (18) connect oil return circuit (V) partly by being provided with the rodless cavity that is connected amplitude oil cylinder (5) described in oil circuit hydraulic connecting of the second one-way valve (17).
8. working bucket hydraulic control system according to claim 7, wherein, connects in oil return circuit (V) part and is also provided with throttle valve (16) by the described rodless cavity between described switching control pilot (15) and the second back pressure valve (18).
9. working bucket hydraulic control system according to claim 7, wherein, the interlock of described switching control pilot (15) and described reversing control valve (7) is controlled so that described switching control pilot (15) when opening described in reversing control valve (7) switch to described the second commutation position.
10. an engineering vehicle, wherein, this project vehicle comprises according to the working bucket hydraulic control system described in any one in claim 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310626383.9A CN103603836B (en) | 2013-11-28 | 2013-11-28 | Cage hydraulic control system and engineering vehicle |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103836021A (en) * | 2014-03-24 | 2014-06-04 | 徐州重型机械有限公司 | Balance combined valve, hydraulic lifting system and fire fighting truck |
| CN105570216A (en) * | 2016-02-22 | 2016-05-11 | 徐州徐工特种工程机械有限公司 | Automatic leveling hydraulic system of telescopic boom forklift tipping bucket for preventing follow-up of big arm |
| CN106050770A (en) * | 2015-09-02 | 2016-10-26 | 徐州重型机械有限公司 | Emergency landing hydraulic system using oil return logic valve |
| CN108278229A (en) * | 2018-03-19 | 2018-07-13 | 湖南星邦重工有限公司 | A kind of crank arm type high-altitude operation vehicle connector leveling hydraulic system |
| CN108730271A (en) * | 2018-07-26 | 2018-11-02 | 徐工集团工程机械有限公司 | A kind of Multifunctional emergency equipment promptly falls arm system |
| CN109185246A (en) * | 2018-11-22 | 2019-01-11 | 徐工消防安全装备有限公司 | Hydraulic control system and aerial working platform vehicle |
| CN109931304A (en) * | 2019-04-18 | 2019-06-25 | 徐工消防安全装备有限公司 | Hydraulic system and its control system and method, engineering machinery |
| CN110608207A (en) * | 2019-09-19 | 2019-12-24 | 柳州柳工挖掘机有限公司 | Emergency unloading device for hydraulic actuating element of engineering machinery |
| CN110775904A (en) * | 2019-10-31 | 2020-02-11 | 三一汽车制造有限公司 | Leveling control system and leveling control method for working bucket of high-altitude vehicle and high-altitude vehicle |
| CN111237270A (en) * | 2020-03-11 | 2020-06-05 | 徐工集团工程机械有限公司 | Rescue equipment vehicle |
| CN111577693A (en) * | 2020-05-07 | 2020-08-25 | 上海建工集团股份有限公司 | Hydraulic cylinder oil circuit locking valves |
| CN111577712A (en) * | 2020-05-07 | 2020-08-25 | 上海建工集团股份有限公司 | Oil way control system for jacking oil cylinder of integral steel platform |
| CN114109946A (en) * | 2021-12-03 | 2022-03-01 | 中船重工重庆液压机电有限公司 | Multi-point synchronous positioning hydraulic device for jack and control method |
| CN114408824A (en) * | 2022-01-19 | 2022-04-29 | 徐州海伦哲专用车辆股份有限公司 | Platform leveling system based on boom springback control |
| CN115218722A (en) * | 2022-06-20 | 2022-10-21 | 重庆零壹空间航天科技有限公司 | Rocket launching pad assisted erecting control method, system, medium and electronic equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103836021A (en) * | 2014-03-24 | 2014-06-04 | 徐州重型机械有限公司 | Balance combined valve, hydraulic lifting system and fire fighting truck |
| CN106050770A (en) * | 2015-09-02 | 2016-10-26 | 徐州重型机械有限公司 | Emergency landing hydraulic system using oil return logic valve |
| CN105570216A (en) * | 2016-02-22 | 2016-05-11 | 徐州徐工特种工程机械有限公司 | Automatic leveling hydraulic system of telescopic boom forklift tipping bucket for preventing follow-up of big arm |
| CN105570216B (en) * | 2016-02-22 | 2017-12-15 | 徐州徐工特种工程机械有限公司 | A kind of Telescopic handler tipping bucket automatic leveling hydraulic system for preventing large arm servo-actuated |
| CN108278229A (en) * | 2018-03-19 | 2018-07-13 | 湖南星邦重工有限公司 | A kind of crank arm type high-altitude operation vehicle connector leveling hydraulic system |
| CN108278229B (en) * | 2018-03-19 | 2024-03-26 | 湖南星邦智能装备股份有限公司 | Crank arm type high-altitude operation vehicle connector leveling hydraulic system |
| CN108730271A (en) * | 2018-07-26 | 2018-11-02 | 徐工集团工程机械有限公司 | A kind of Multifunctional emergency equipment promptly falls arm system |
| CN108730271B (en) * | 2018-07-26 | 2023-11-07 | 江苏徐工工程机械研究院有限公司 | Emergency arm falling system of multifunctional emergency equipment |
| CN109185246A (en) * | 2018-11-22 | 2019-01-11 | 徐工消防安全装备有限公司 | Hydraulic control system and aerial working platform vehicle |
| CN109185246B (en) * | 2018-11-22 | 2024-06-07 | 徐工消防安全装备有限公司 | Hydraulic control system and aerial work platform truck |
| CN109931304A (en) * | 2019-04-18 | 2019-06-25 | 徐工消防安全装备有限公司 | Hydraulic system and its control system and method, engineering machinery |
| CN110608207A (en) * | 2019-09-19 | 2019-12-24 | 柳州柳工挖掘机有限公司 | Emergency unloading device for hydraulic actuating element of engineering machinery |
| CN110608207B (en) * | 2019-09-19 | 2021-05-14 | 柳州柳工挖掘机有限公司 | Emergency unloading device for hydraulic actuating element of engineering machinery |
| CN110775904A (en) * | 2019-10-31 | 2020-02-11 | 三一汽车制造有限公司 | Leveling control system and leveling control method for working bucket of high-altitude vehicle and high-altitude vehicle |
| CN111237270A (en) * | 2020-03-11 | 2020-06-05 | 徐工集团工程机械有限公司 | Rescue equipment vehicle |
| CN111577712A (en) * | 2020-05-07 | 2020-08-25 | 上海建工集团股份有限公司 | Oil way control system for jacking oil cylinder of integral steel platform |
| CN111577693A (en) * | 2020-05-07 | 2020-08-25 | 上海建工集团股份有限公司 | Hydraulic cylinder oil circuit locking valves |
| CN114109946A (en) * | 2021-12-03 | 2022-03-01 | 中船重工重庆液压机电有限公司 | Multi-point synchronous positioning hydraulic device for jack and control method |
| CN114408824A (en) * | 2022-01-19 | 2022-04-29 | 徐州海伦哲专用车辆股份有限公司 | Platform leveling system based on boom springback control |
| CN114408824B (en) * | 2022-01-19 | 2023-10-27 | 徐州海伦哲专用车辆股份有限公司 | Platform leveling system based on arm support rebound control |
| CN115218722A (en) * | 2022-06-20 | 2022-10-21 | 重庆零壹空间航天科技有限公司 | Rocket launching pad assisted erecting control method, system, medium and electronic equipment |
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Address after: 410200 No. 997, Section 2, Tengfei Road, Wangcheng District, Changsha City, Hunan Province Patentee after: Hunan Zoomlion emergency equipment Co.,Ltd. Patentee after: ZOOMLION HEAVY INDUSTRY SCIENCE&TECHNOLOGY Co.,Ltd. Address before: No.997 Jinxing Road, Wangcheng District, Changsha City, Hunan Province Patentee before: Changsha Zhonglian Fire-Fighting Machinery Co.,Ltd. Patentee before: ZOOMLION HEAVY INDUSTRY SCIENCE&TECHNOLOGY Co.,Ltd. |