CN103629175A - working bucket hydraulic control system and engineering vehicle - Google Patents
working bucket hydraulic control system and engineering vehicle Download PDFInfo
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- CN103629175A CN103629175A CN201310626353.8A CN201310626353A CN103629175A CN 103629175 A CN103629175 A CN 103629175A CN 201310626353 A CN201310626353 A CN 201310626353A CN 103629175 A CN103629175 A CN 103629175A
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- 239000003921 oil Substances 0.000 claims abstract description 208
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 32
- 239000002828 fuel tank Substances 0.000 claims description 11
- 239000000446 fuel Substances 0.000 claims description 10
- 239000012530 fluid Substances 0.000 claims description 8
- 238000000034 method Methods 0.000 abstract description 12
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- 239000010729 system oil Substances 0.000 abstract 1
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- 239000007788 liquid Substances 0.000 description 2
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- 206010001541 Akinesia Diseases 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
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- 230000006835 compression Effects 0.000 description 1
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- 230000001276 controlling effect Effects 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
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Abstract
The invention discloses a hydraulic control system of a working bucket and an engineering vehicle, wherein the control system comprises a leveling oil cylinder (4), a leveling control loop, an amplitude variation oil cylinder (5), an amplitude variation control loop, a pressurizing oil cylinder (7) and a pressurizing oil path (V1), wherein a rod cavity oil path of the pressurizing oil cylinder is connected with a main oil inlet oil path (P); the pressure-increasing oil circuit is provided with a first switch control valve (11) and a first bypass oil circuit (V2) which is hydraulically connected to a rod cavity of the luffing cylinder and a second bypass oil circuit (V3) which is hydraulically connected to a system oil tank (15) and is provided with a second switch control valve (8). Because the pressurizing oil path is additionally arranged, in the self-weight recovery process of the arm support, hydraulic oil in the rodless cavity of the luffing oil cylinder can supply oil to the leveling oil cylinder through the pressurizing oil path, the pressurizing oil cylinder, the main oil inlet oil path and the leveling control loop, so that the working bucket is leveled in real time. In the process, the power unit of the emergency pump does not need to be frequently started to level the working bucket, and energy is saved.
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.As shown in Figure 1, on the turntable 3 of engineering vehicle, be hinged with jib 2, jib 2 carries out the motion of pivotable luffing with respect to turntable 3 under the promotion of amplitude oil cylinder 5, drives the working bucket 1 on the top that is hinged on jib 2 hoist or decline.Working bucket 1 hoist or decline process in, by 4 pairs of working buckets of leveling cyclinder 1, carry out 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 jib 2 luffings launch, if the power plant of the Main Hydraulic Pump of Full Vehicle System or driving Main Hydraulic Pump break down and akinesia, need jib 2 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 2 is regained smoothly, and emergencypump device provides power with real-time leveling working bucket 1 for leveling cyclinder 4.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 2 more conveniently, under the Gravitative Loads of jib 2, the hydraulic oil in the rodless cavity of compressing amplitude oil cylinder 5, makes it evenly to discharge oil sump tank, thereby reach the object of jib 2 the automatic recoveries, i.e. so-called " jib deadweight is reclaimed ".Now, in the gravity decentralization process of jib 2, working bucket 1 is difficult to keep in real time level.If while being mounted with people or thing in working bucket, when realizing jib gravity and automatically transfer, need start very frequently emergencypump power unit with leveling working bucket 1, 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 the engineering vehicle with this working bucket hydraulic control system, can be to working bucket automatic leveling and without starting emergencypump power unit in the gravity decentralization process of jib.
For achieving the above object, the invention provides a kind of working bucket hydraulic control system, described system comprises: for described working bucket being carried out to leveling cyclinder and leveling control loop, amplitude oil cylinder and the luffing control loop of leveling and being respectively main oil-feed oil circuit and the main oil return circuit that each loop provides oil-feed and oil return, thereby described amplitude oil cylinder is for controlling the luffing of jib and driving the described working bucket lifting being connected with this jib; And
Pressurizing cylinder and be connected to the rodless cavity of this pressurizing cylinder and the rodless cavity of described amplitude oil cylinder between Pressure Increasing Oil-Line, in this Pressure Increasing Oil-Line, be provided with the first switching control pilot, the rod chamber oil circuit of described pressurizing cylinder connects described main oil-feed oil circuit with to described leveling control loop fuel feeding;
Wherein, described Pressure Increasing Oil-Line has hydraulic connecting to the first other oil circuit and hydraulic connecting of connecing of the rod chamber of described amplitude oil cylinder to the second other oil circuit that connects of system fuel tank, and this connects by second and in oil circuit, is provided with second switch control valve.
Preferably, in described luffing control loop, be provided with amplitude oil cylinder equilibrium valve group, described first other connects being connected on oil circuit between the rod chamber that oil circuit is connected to described amplitude oil cylinder equilibrium valve group and amplitude oil cylinder, and the described first other connecing in oil circuit is provided with the first one-way valve, so that hydraulic oil can flow to the rod chamber of described amplitude oil cylinder and oppositely cut-off by the described first other oil circuit that connects.
Preferably, in described luffing control loop, be also provided with luffing main operation valve, this luffing main operation valve connects oil circuit by rod chamber respectively and is connected with rodless cavity on the corresponding rod chamber and rodless cavity that is connected to described amplitude oil cylinder of oil circuit, described amplitude oil cylinder equilibrium valve group comprises the first externally controlled type equilibrium valve and the second externally controlled type equilibrium valve that structure is identical, described the first externally controlled type equilibrium valve is arranged in described rod chamber connection oil circuit and pilot control oil circuit connects described rodless cavity connection oil circuit, described the second externally controlled type equilibrium valve is arranged in described rodless cavity connection oil circuit and pilot control oil circuit connects described rod chamber connection oil circuit, wherein, described the first other rod chamber connecing between the rod chamber that oil circuit is connected to described the first externally controlled type equilibrium valve and described amplitude oil cylinder is connected in oil circuit part.
Preferably, this system also comprises the second one-way valve, the rod chamber oil circuit of described pressurizing cylinder is connected on the tie point in described main oil-feed oil circuit, described the second one-way valve is arranged in the described main oil-feed oil circuit part of described tie point one side, so that the described main oil-feed oil circuit part of the hydraulic oil in described pressurizing cylinder by described tie point opposite side flows to described leveling control loop.
Preferably, this system also comprises the first relief valve, and this first relief valve is arranged on being connected on oil circuit between described Pressure Increasing Oil-Line and described system fuel tank.
Preferably, the interlock of described the first switching control pilot and described second switch control valve is controlled, so that described Pressure Increasing Oil-Line and the second other another one of blocking when connecing the one conducting in oil circuit.
Preferably, in described Pressure Increasing Oil-Line, be provided with throttle valve.
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, in described leveling control valve group, also comprise for limiting the second relief valve of the fuel feeding oil pressure of described leveling control loop.
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 owing to having set up pressurizing cylinder and first, second switch control valve, thereby in the process reclaiming in jib deadweight, the rodless cavity of amplitude oil cylinder by compression, thereby make a part for the pressure oil in its rodless cavity connect by the first side the rod chamber that oil circuit flows back into amplitude oil cylinder, another part is by flowing to the rodless cavity of pressurizing cylinder, make the fluid supercharging of the rod chamber of pressurizing cylinder, pressure oil after supercharging by main oil-feed oil circuit and leveling control loop to leveling cyclinder fuel feeding, thereby the hydraulic oil of having realized between a plurality of oil cylinders recycles, can automatic leveling working bucket.
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 working bucket common in engineering vehicle and the mounting structure schematic diagram of drive unit thereof;
Fig. 2 is that pressurizing 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;
Fig. 3 is the working bucket hydraulic control system shown in Fig. 2, and the pressurizing cylinder that different is is wherein in running order.
description of reference numerals
1 working bucket 2 jibs
3 turntable 4 leveling cyclinders
5 amplitude oil cylinder
7 pressurizing cylinder 8 second switch control valves
9 first relief valve 10 throttle valve
11 first switching control pilot 12 first one-way valves
13 amplitude oil cylinder equilibrium valve group 14 luffing main operation valves
15 system fuel tank 16 back pressure valves
17 second one-way valve 18 leveling control valve groups
19 leveling cyclinder equilibrium valve group 181 electric proportional control valves
182 first function module 183 second function modules
The other oil circuit that connects of V1 Pressure Increasing Oil-Line V2 first
The other oil circuit A tie point that connects of V3 second
The main oil return circuit of the main oil-feed oil circuit of P T
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 that jib deadweight is reclaimed.
Shown in Fig. 1 and Fig. 2, the invention provides a kind of working bucket hydraulic control system, working bucket 1 is articulated with on the top of jib 2, the bottom of this jib 2 is articulated with on turntable 3, wherein, this working bucket hydraulic control system comprises: for working bucket 1 being carried out to the leveling cyclinder 4 of leveling and the amplitude oil cylinder 5 of leveling control loop, jib 2 with luffing control loop 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; And pressurizing cylinder 7 and be connected to the rodless cavity of this pressurizing cylinder 7 and the rodless cavity of amplitude oil cylinder 5 between Pressure Increasing Oil-Line V1, in this Pressure Increasing Oil-Line V1, being provided with in the first switching control pilot 11(figure is the solenoid directional control valve of 2/2-way), the rod chamber oil circuit of pressurizing cylinder 7 connects main oil-feed oil circuit P with to leveling control loop fuel feeding; Wherein, Pressure Increasing Oil-Line V1 has hydraulic connecting to the first other oil circuit V2 and hydraulic connecting of connecing of the rod chamber of amplitude oil cylinder 5 to the second other oil circuit V3 that connects of system fuel tank 15, and this connects by second and is provided with in second switch control valve 8(figure in oil circuit V3 is the solenoid directional control valve of two-bit triplet).As total inventive concept, by setting up Pressure Increasing Oil-Line V1 between the rodless cavity at pressurizing cylinder 7 and the rodless cavity of amplitude oil cylinder 5, make in jib deadweight callback course, hydraulic oil in the rodless cavity of amplitude oil cylinder 5 can flow to by Pressure Increasing Oil-Line V1 the rodless cavity of pressurizing cylinder 7, thereby the oil liquid pressure in the rod chamber of promotion pressurizing cylinder 7 rises and exports to main oil-feed oil circuit P, 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, and without frequent starting emergencypump power unit, working bucket is carried out to leveling, save power source and avoid corresponding complex control.
Wherein, amplitude oil cylinder 5 is generally arranged between turntable 3 and jib 2 as illustrated in fig. 1 as main amplitude oil cylinder, but 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, and when No. two arms are articulated with on the epimerite telescopic boom of an arm, amplitude oil cylinder 5 also 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.What those skilled in the art can understand is, typically the piston cavity volume of amplitude oil cylinder 5 is much larger than leveling cyclinder 4, and in jib deadweight callback course, the stroke of amplitude oil cylinder 5 is also greater than the stroke of leveling cyclinder 4, makes the fluid flow flowing out in the rodless cavity of amplitude oil cylinder 5 far exceed the needs flow that meets leveling cyclinder 4.The rod chamber of simultaneously considering amplitude oil cylinder 5 needs to supplement fluid simultaneously, to prevent inhaling sky, unfavorable to the use of hydraulic element.Therefore the part fluid flowing out in the rodless cavity of amplitude oil cylinder 5 also can meet oil circuit V2 by the first side and add in rod chamber, and the hydraulic oil of the difference in volume size in two chambeies of amplitude oil cylinder 5 should guarantee to meet the needs of leveling cyclinder 4.The second other oil circuit V3 that connects for discharging the hydraulic oil of Pressure Increasing Oil-Line V1 when jib 2 works, make the piston rod in pressurizing cylinder 7 be moved to the left cylinder bottom under the pressure oil effect of main oil-feed oil circuit P, during for pressurizing cylinder 7 work, reserve enough piston strokes.
As shown in Figure 2, in luffing control loop, be provided with amplitude oil cylinder equilibrium valve group 13 and luffing main operation valve 14, this luffing main operation valve 14 comprises function module and main reversing valve etc., two actuator ports of main reversing valve connect oil circuit by rod chamber respectively and are connected with rodless cavity on the corresponding rod chamber and rodless cavity that is connected to amplitude oil cylinder 5 of oil circuit, stretching out or bouncing back with switching controls amplitude oil cylinder 5.Amplitude oil cylinder equilibrium valve group 13 is controlled for oil-feed and the oil return in the bar chamber to amplitude oil cylinder 5, and lockup piston bar causes damage to prevent piston rod rapid decompression from declining.Be provided with on the basis of amplitude oil cylinder equilibrium valve group 13, described the first other oil circuit (being that rod chamber connects oil circuit) that is connected connecing between the rod chamber that oil circuit V2 is connected to amplitude oil cylinder equilibrium valve group 13 and amplitude oil cylinder 5 is gone up, i.e. K2 point in Fig. 2 or Fig. 3.Particularly, amplitude oil cylinder equilibrium valve group 13 comprises 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 rod chamber and connects in oil circuit and pilot control oil circuit connection rodless cavity connection oil circuit, and the second externally controlled type equilibrium valve is arranged in rodless cavity connection oil circuit and pilot control oil circuit connection rod chamber connects oil circuit.Like this, the first other rod chamber connecing between the rod chamber that oil circuit V2 is preferably connected to the first externally controlled type equilibrium valve and amplitude oil cylinder 5 is connected in oil circuit part.Because each externally controlled type equilibrium valve comprises sequence valve in parallel and one-way valve, thereby due to the reverse cut-off effect of the one-way valve in externally controlled type equilibrium valve, the first other hydraulic oil connecing in oil circuit V2 can not flow to system fuel tank 15, and can only flow to rod chamber.Further, the first other connecing in oil circuit V2 is also provided with the first one-way valve 12, and the reverse port of this first one-way valve 12 connects rod chamber, so that hydraulic oil can flow to the rod chamber of amplitude oil cylinder 5 and oppositely cut-off by the first other oil circuit V2 that connects.
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, for guaranteeing that the pressure oil that the rod chamber of pressurizing cylinder 7 flows out can all flow to leveling control loop, as shown in Figure 2, the rod chamber oil circuit of the pressurizing cylinder 7 in present embodiment is connected on the tie point A in main oil-feed oil circuit P, separately there is the second one-way valve 17 to be arranged in the main oil-feed oil circuit P part of tie point A mono-side, the rod chamber of the reverse port hydraulic connecting pressurizing cylinder 7 of the second one-way valve 17, so that the main oil-feed oil circuit P part of the hydraulic oil in rod chamber by tie point A opposite side flows to leveling control loop.Certainly, the second one-way valve 17 can also be such as electromagnetic switch valve etc., can realize above-mentioned effect equally.
In addition, larger at the stroke of amplitude oil cylinder 5, cause the hydraulic oil that discharges in Pressure Increasing Oil-Line V1 excessive, when pressure is excessive, also need to carry out pressure release.For this reason, also preferably include the first relief valve 9 in hydraulic control system of the present invention, this first relief valve 9 is as the safety overflow valve of Pressure Increasing Oil-Line V1, is arranged on as illustrated in fig. 2 being connected on oil circuit between Pressure Increasing Oil-Line V1 and system fuel tank 15.In addition, in Pressure Increasing Oil-Line V1, be also provided preferably with throttle valve 10, by regulating the valve port opening size of this throttle valve 10, make jib 2 uniform and stable and decline.Between system fuel tank 15 and main oil return circuit T, be provided with back pressure valve 16 so that keep certain back pressure in the oil return circuit T of winner, in engineering vehicle, the hydraulic oil in the main oil return circuit T of the portion side of getting on the bus of vehicle is unlikely to because of self gravitation, to flow back to completely in the system fuel tank 15 of the portion side of getting off.
In leveling control loop, be generally provided with leveling control valve group 18 and leveling cyclinder equilibrium valve group 19 as shown in Figure 2, the structure of leveling cyclinder equilibrium valve group 19 and act on roughly the same amplitude oil cylinder equilibrium valve group 13, repeats no more.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 18 comprises electric proportional control valve 181, 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 181 of dip sensor.In the present embodiment, as shown in Figure 2, in leveling control valve group 18, generally also have and the second function module 183 of electric proportional control valve 181 cooperatings and other the first function module 182 etc., so control unit can be controlled electric proportional control valve 181 and in conjunction with the second function module 183 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 second relief valve (not shown) of the fuel feeding oil pressure of leveling control loop, in first function module 182 of this second relief valve operated by rotary motion before electric proportional control valve 181.When the fuel feeding oil pressure of pressurizing cylinder 7 is excessive, can the second relief valve pressure release from the first function module 182 overflow.It should be noted that, leveling control valve group 18 in present embodiment shown in Fig. 2 is common leveling control valve group, being arranged on the first function module 182 of electric proportional control valve 181 front and back and the structure of the second function module 183 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.
Above-mentioned working bucket hydraulic control system may be used on aerial ladder truck, truck, high-altitude operation vehicle etc. to be had in the various engineering vehicle of working bucket, can keep the real-time level of working bucket, and saves energy consumption, avoids frequent starting emergencypump power unit.Below in conjunction with Fig. 2 and Fig. 3, set forth the working procedure of working bucket hydraulic control system.
When jib 2 normal operation, as shown in Figure 2, the first switching control pilot 11 turn-offs and Pressure Increasing Oil-Line V1 is disconnected, second switch control valve 8 is opened and the other oil circuit V3 that connects of conducting second, now Pressure Increasing Oil-Line is not worked, leveling cyclinder 4 and amplitude oil cylinder 5 are worked by system Main Hydraulic Pump driven, and the hydraulic oil in the rodless cavity of pressurizing cylinder 7 meets oil circuit V3 by the second side and is all back to system fuel tank 15 simultaneously, and the piston of pressurizing cylinder 7 moves to left to cylinder bottom.
When the deadweight of needs jib is reclaimed, the power source of Main Hydraulic Pump and hydraulic emergency pump power source are all in the state of shutting down, as shown in Figure 3, now make the first switching control pilot 11 open and conducting Pressure Increasing Oil-Line V1, second switch control valve 8 turn-offs and the second other oil circuit V3 that connects is disconnected.Now, due to the Action of Gravity Field of jib 2 self, there is certain pressure in the hydraulic oil in the rodless cavity of amplitude oil cylinder 5, so the hydraulic oil in this rodless cavity flows to Pressure Increasing Oil-Line V1, and oil cylinder retraction, jib 2 reaches the object that deadweight is reclaimed.Wherein, the existence of throttle valve 10 can prevent that jib 3 from reclaiming excessive velocities, makes the decline of jib 2 uniform and stable.In the retraction process of amplitude oil cylinder 5, in rod chamber, need to supplement in time hydraulic oil, otherwise can inhale sky, unfavorable to the use of hydraulic element, and also in amplitude oil cylinder decline process, working bucket 1 can not automatic leveling.Along with the decline of jib 2, working bucket 1 produces.Thereby, in the present invention, hydraulic oil in the rodless cavity of amplitude oil cylinder 5 flow through the first switching control pilot 11, throttle valve 10, then a part of hydraulic oil is through being provided with the first other connecing in the rod chamber that oil circuit V2 adds to amplitude oil cylinder 5 of the first one-way valve 12, and another part hydraulic oil flows to the rodless cavity of pressurizing cylinder 7.The piston rod that hydraulic oil promotes pressurizing cylinder 7 outwards moves, existence due to piston rod, between rod chamber and rodless cavity, there is difference in volume, make stretching out in process at piston rod, oil liquid pressure in rod chamber constantly rises, the hydraulic oil of rod chamber outwards flows out to main oil-feed oil circuit P, because be provided with the second one-way valve 17 in main oil-feed oil circuit P, so the pressure oil that the rod chamber of pressurizing cylinder 7 flows out is forced to flow to leveling control valve group 18.Leveling control valve group 18 is controlled to the leveling cyclinder 4 of working bucket 1 and is supplied with suitable hydraulic oil, makes working bucket 1 keep level.
If the delivery pressure of the rod chamber of pressurizing cylinder 7 is P1, P1 should be greater than the maximum service pressure of leveling cyclinder 4, be less than again the oil pressure relief of the second relief valve built-in in the first function module 182 in leveling control valve group simultaneously, so both guaranteed that leveling cyclinder 4 can move smoothly under any state, guaranteed again that the hydraulic oil in the rod chamber of pressurizing cylinder 7 did not produce overflow.
In addition, in design, should guarantee that in the rod chamber of pressurizing cylinder 7, the in large supply of hydraulic oil guarantees in the situation that hydraulic oil has a small amount of leakage in the hydraulic oil demand of leveling cyclinder 4, also can fuel feeding abundant.In addition, the second switch control valve 8 shown in Fig. 2 and Fig. 3 is open type, also can be designed to normal close type.
In the present invention, can guarantee in jib deadweight callback course, working bucket 1 can automatic leveling, remains level.Compared with prior art, saved the energy of emergency power unit.In the situation that working bucket 1 is loaded with people or thing, can greatly improve the Security of jib 2 decline processes, also greatly shortened the recovery time of jib 2, meanwhile, the adverse effect of having avoided emergency power unit frequent starting to cause machine.Wherein, due to the use of the second switch control valve 8 in Fig. 2, both guaranteed that the rod chamber of pressurizing cylinder 7 was set up pressure smoothly when deadweight is reclaimed.Guarantee again to adopt main oil pump to drive under the normal working of jib knee-action in hydraulic system, the piston rod of pressurizing cylinder 7 can be recovered to the end smoothly, makes the rod chamber of pressurizing cylinder 7 be full of hydraulic oil, for gravity, transfers and gets ready simultaneously.
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 leveling cyclinder (4) that described working bucket (1) is carried out to leveling with leveling control loop, amplitude oil cylinder (5) is with luffing control 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 amplitude oil cylinder (5) for controlling jib (2) thus luffing described working bucket (1) lifting that is connected with this jib (2) of drive; And
Pressurizing cylinder (7) and be connected to the rodless cavity of this pressurizing cylinder (7) and the rodless cavity of described amplitude oil cylinder (5) between Pressure Increasing Oil-Line (V1), in this Pressure Increasing Oil-Line (V1), be provided with the first switching control pilot (11), the rod chamber oil circuit of described pressurizing cylinder (7) connects described main oil-feed oil circuit (P) with to described leveling control loop fuel feeding;
Wherein, described Pressure Increasing Oil-Line (V1) have hydraulic connecting to the rod chamber of described amplitude oil cylinder (5) first other connect oil circuit (V2) and hydraulic connecting to system fuel tank (15) second by connect oil circuit (V3), this connects by second and in oil circuit (V3), is provided with second switch control valve (8).
2. working bucket hydraulic control system according to claim 1, wherein, in described luffing control loop, be provided with amplitude oil cylinder equilibrium valve group (13), described first other connects being connected on oil circuit between the rod chamber that oil circuit (V2) is connected to described amplitude oil cylinder equilibrium valve group (13) and amplitude oil cylinder (5), and the described first other connecing in oil circuit (V2) is provided with the first one-way valve (12), so that hydraulic oil can flow to the rod chamber of described amplitude oil cylinder (5) and oppositely cut-off by the described first other oil circuit (V2) that connects.
3. working bucket hydraulic control system according to claim 2, wherein, in described luffing control loop, be also provided with luffing main operation valve (14), this luffing main operation valve (14) connects oil circuit by rod chamber respectively and is connected with rodless cavity on the corresponding rod chamber and rodless cavity that is connected to described amplitude oil cylinder (5) of oil circuit, described amplitude oil cylinder equilibrium valve group (13) comprises the first externally controlled type equilibrium valve and the second externally controlled type equilibrium valve that structure is identical, described the first externally controlled type equilibrium valve is arranged in described rod chamber connection oil circuit and pilot control oil circuit connects described rodless cavity connection oil circuit, described the second externally controlled type equilibrium valve is arranged in described rodless cavity connection oil circuit and pilot control oil circuit connects described rod chamber connection oil circuit, wherein, described the first other rod chamber connecing between the rod chamber that oil circuit (V2) is connected to described the first externally controlled type equilibrium valve and described amplitude oil cylinder (5) is connected in oil circuit part.
4. working bucket hydraulic control system according to claim 1, wherein, this system also comprises the second one-way valve (17), the rod chamber oil circuit of described pressurizing cylinder (7) is connected on the tie point (A) in described main oil-feed oil circuit (P), described the second one-way valve (17) is arranged in described main oil-feed oil circuit (P) part of described tie point (A) side, so that described main oil-feed oil circuit (P) part of the hydraulic oil in described pressurizing cylinder (7) by described tie point (A) opposite side flows to described leveling control loop.
5. working bucket hydraulic control system according to claim 1, wherein, this system also comprises the first relief valve (9), this first relief valve (9) is arranged on being connected on oil circuit between described Pressure Increasing Oil-Line (V1) and described system fuel tank (15).
6. working bucket hydraulic control system according to claim 1, wherein, the interlock of described the first switching control pilot (11) and described second switch control valve (8) is controlled, so that block another one when connecing the one conducting in oil circuit (V3) by described Pressure Increasing Oil-Line (V1) and second.
7. working bucket hydraulic control system according to claim 1, wherein, is provided with throttle valve (10) in described Pressure Increasing Oil-Line (V1).
8. 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 (18), this leveling control valve group (18) comprises electric proportional control valve (181), and described control unit is used for according to electric proportional control valve (181) described in the SC sigmal control of described dip sensor to regulate the hydraulic fluid flow rate that flows to described leveling cyclinder (4).
9. working bucket hydraulic control system according to claim 8, wherein, also comprises in described leveling control valve group (11) for limiting the second relief valve of the fuel feeding oil pressure of described leveling control loop.
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 |
|---|---|---|---|
| CN201310626353.8A CN103629175B (en) | 2013-11-28 | 2013-11-28 | working bucket hydraulic control system and engineering vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310626353.8A CN103629175B (en) | 2013-11-28 | 2013-11-28 | working bucket hydraulic control system and engineering vehicle |
Publications (2)
| Publication Number | Publication Date |
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| CN103629175A true CN103629175A (en) | 2014-03-12 |
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|---|---|---|---|---|
| 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 |
| CN106829815A (en) * | 2017-03-27 | 2017-06-13 | 徐工消防安全装备有限公司 | The arm support control system and aerial work platform of aerial work platform |
| CN108194457A (en) * | 2017-12-27 | 2018-06-22 | 中联重科股份有限公司 | Hydraulic jacking system and tower crane |
| 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 |
| CN108999821A (en) * | 2018-10-15 | 2018-12-14 | 长沙远大住宅工业阜阳有限公司 | Fluid power system and roll-over table with angled protection |
| CN113294397A (en) * | 2021-04-13 | 2021-08-24 | 中铁工程装备集团有限公司 | Pipe piece crane and shield machine |
| CN113294391A (en) * | 2021-05-31 | 2021-08-24 | 三一汽车制造有限公司 | Hydraulic system and engineering machinery |
| CN113586557A (en) * | 2021-07-23 | 2021-11-02 | 三一汽车制造有限公司 | Arm support control method, device and system of pumping vehicle and pumping vehicle |
| CN114233697A (en) * | 2021-12-14 | 2022-03-25 | 重庆敏泰液压技术有限公司 | Balance valve for aerial ladder truck |
| CN115059658A (en) * | 2022-05-24 | 2022-09-16 | 湖南中联重科智能高空作业机械有限公司 | Telescopic oil cylinder hydraulic system and engineering machinery |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS506062B1 (en) * | 1968-05-18 | 1975-03-10 | ||
| US5255517A (en) * | 1989-09-13 | 1993-10-26 | Weber Guenter | Control device for hydraulic operating cylinders of a combined lifting platform and a closing wall of a vehicle |
| CN1753831A (en) * | 2003-02-27 | 2006-03-29 | 日立建机株式会社 | Hydraulic control device of hydraulic working machine |
| CN101966971A (en) * | 2010-10-26 | 2011-02-09 | 湘潭电机股份有限公司 | Automatic vehicle leveling device supported by three lifting cylinders |
| CN102030293A (en) * | 2010-12-10 | 2011-04-27 | 徐州重型机械有限公司 | Elevated operation vehicle and platform leveling hydraulic system thereof |
| CN102530784A (en) * | 2011-12-15 | 2012-07-04 | 长沙中联消防机械有限公司 | Work arm hydraulic system of high-altitude operation vehicle and high-altitude operation vehicle with the hydraulic system |
| CN103332636A (en) * | 2013-07-12 | 2013-10-02 | 徐州重型机械有限公司 | Overhead operation vehicle and work platform hydraulic leveling system thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS506062Y2 (en) * | 1971-07-13 | 1975-02-20 |
-
2013
- 2013-11-28 CN CN201310626353.8A patent/CN103629175B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS506062B1 (en) * | 1968-05-18 | 1975-03-10 | ||
| US5255517A (en) * | 1989-09-13 | 1993-10-26 | Weber Guenter | Control device for hydraulic operating cylinders of a combined lifting platform and a closing wall of a vehicle |
| CN1753831A (en) * | 2003-02-27 | 2006-03-29 | 日立建机株式会社 | Hydraulic control device of hydraulic working machine |
| CN101966971A (en) * | 2010-10-26 | 2011-02-09 | 湘潭电机股份有限公司 | Automatic vehicle leveling device supported by three lifting cylinders |
| CN102030293A (en) * | 2010-12-10 | 2011-04-27 | 徐州重型机械有限公司 | Elevated operation vehicle and platform leveling hydraulic system thereof |
| CN102530784A (en) * | 2011-12-15 | 2012-07-04 | 长沙中联消防机械有限公司 | Work arm hydraulic system of high-altitude operation vehicle and high-altitude operation vehicle with the hydraulic system |
| CN103332636A (en) * | 2013-07-12 | 2013-10-02 | 徐州重型机械有限公司 | Overhead operation vehicle and work platform hydraulic leveling system thereof |
Cited By (19)
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| 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 |
| CN106829815A (en) * | 2017-03-27 | 2017-06-13 | 徐工消防安全装备有限公司 | The arm support control system and aerial work platform of aerial work platform |
| CN108194457A (en) * | 2017-12-27 | 2018-06-22 | 中联重科股份有限公司 | Hydraulic jacking system and tower crane |
| 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 |
| CN108999821B (en) * | 2018-10-15 | 2024-04-16 | 长沙远大住宅工业阜阳有限公司 | Hydraulic driving system with angle protection and overturning platform |
| CN108999821A (en) * | 2018-10-15 | 2018-12-14 | 长沙远大住宅工业阜阳有限公司 | Fluid power system and roll-over table with angled protection |
| CN113294397A (en) * | 2021-04-13 | 2021-08-24 | 中铁工程装备集团有限公司 | Pipe piece crane and shield machine |
| CN113294397B (en) * | 2021-04-13 | 2024-02-09 | 中铁工程装备集团有限公司 | Segment crane and shield machine |
| CN113294391A (en) * | 2021-05-31 | 2021-08-24 | 三一汽车制造有限公司 | Hydraulic system and engineering machinery |
| CN113294391B (en) * | 2021-05-31 | 2023-05-05 | 三一汽车制造有限公司 | Hydraulic system and engineering machinery |
| CN113586557A (en) * | 2021-07-23 | 2021-11-02 | 三一汽车制造有限公司 | Arm support control method, device and system of pumping vehicle and pumping vehicle |
| CN113586557B (en) * | 2021-07-23 | 2023-11-17 | 三一汽车制造有限公司 | Arm support control method, device and system of pumping vehicle and pumping vehicle |
| CN114233697A (en) * | 2021-12-14 | 2022-03-25 | 重庆敏泰液压技术有限公司 | Balance valve for aerial ladder truck |
| CN115059658A (en) * | 2022-05-24 | 2022-09-16 | 湖南中联重科智能高空作业机械有限公司 | Telescopic oil cylinder hydraulic system and engineering machinery |
| CN115653957B (en) * | 2022-12-09 | 2023-04-07 | 临工重机股份有限公司 | Hydraulic leveling system and aerial work platform |
| CN115653957A (en) * | 2022-12-09 | 2023-01-31 | 临工重机股份有限公司 | Hydraulic leveling system and aerial work platform |
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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. |