CN106678096B - A kind of overhead working truck leveling system - Google Patents
A kind of overhead working truck leveling system Download PDFInfo
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- CN106678096B CN106678096B CN201611234237.1A CN201611234237A CN106678096B CN 106678096 B CN106678096 B CN 106678096B CN 201611234237 A CN201611234237 A CN 201611234237A CN 106678096 B CN106678096 B CN 106678096B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F11/00—Lifting devices specially adapted for particular uses not otherwise provided for
- B66F11/04—Lifting devices specially adapted for particular uses not otherwise provided for for movable platforms or cabins, e.g. on vehicles, permitting workmen to place themselves in any desired position for carrying out required operations
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/01—Locking-valves or other detent i.e. load-holding devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/04—Special measures taken in connection with the properties of the fluid
- F15B21/044—Removal or measurement of undissolved gas, e.g. de-aeration, venting or bleeding
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Forklifts And Lifting Vehicles (AREA)
- Vehicle Body Suspensions (AREA)
Abstract
A kind of overhead working truck leveling system,Solenoid directional control valve is respectively with first,Two balanced valves connect,First,Two balanced valves connect respectively with two chambers of active leveling cyclinder,First,Two balanced valves connect respectively with two chambers of driven leveling cyclinder,It is main,Two chambers of driven leveling cyclinder are equipped with vent valve,The T mouths of solenoid directional control valve are equipped with counterbalance valve,The P mouths of solenoid directional control valve are equipped with flow control valve,The Reverse Turning Control mouth of first balanced valve is connected with its B mouthfuls,Its positive control mouth connects for A mouthfuls with the second balanced valve,The Reverse Turning Control mouth of second balanced valve is connected with its B mouthfuls,Its positive control mouth connects for A mouthfuls with the first balanced valve,The positive control mouth of 3rd balanced valve connects for A mouthfuls with the 4th balanced valve,The positive control mouth of 4th balanced valve connects for A mouthfuls with the 3rd balanced valve,3rd,The positive Opening pressure of four balanced valves is no more than 2Mpa,And the 3rd,Four balanced valve Reverse Turning Control hydraulic fluid ports are unloaded.The system can solve hysteresis and skew problem in job platform leveling.
Description
Technical field
The present invention relates to high-altitude operation vehicle leveling technology fields, are specifically a kind of hydraulic leveling system.
Background technology
The leveling system of telescopic arm or the arm-type high-altitude operation vehicle of mixing is generally using hydraulic leveling and electro-hydraulic automatic at present
Leveling two ways.Since electro-hydraulic automatic leveling is of high cost, control is complicated, and it is complicated to apply in general to big height, working condition
On high-altitude operation vehicle.Hydraulic leveling or hydraulic leveling are generally used for the arm-type high-altitude operation vehicle of low clearance telescopic arm or mixing
Add the mode of mechanical leveling.
Leveling lags during hydraulic leveling system has leveling at present, and it reduce the effects of job platform leveling
Rate, meanwhile, also there are the job platform after leveling it is crooked the problem of, it is crooked due to job platform, make to be located in job platform
Operating personnel be inconvenient to carry out working at height or even some potential safety problems can be brought to working at height personnel.
The content of the invention
In view of the above-mentioned problems of the prior art, the present invention provides a kind of overhead working truck leveling system, this is
System can effectively solve the problems, such as to lag during leveling, can improve the efficiency of job platform leveling, meanwhile, after being avoided that leveling
There is crooked situation in job platform, and energy convenient working personnel carry out the work in high-altitude, can improve the safety of working at height personnel
Coefficient.
The present invention provides a kind of overhead working truck leveling system, including level-one arm, two level arm, job platform and electromagnetism
Reversal valve, the left end of the two level arm are hingedly connected to the upper end of level-one arm, hinged between two level arm left part and level-one arm top
Ground is connected with active leveling cyclinder, and amplitude oil cylinder, two level are hingedly connected between the middle part of two level arm and the middle part of level-one arm
Driven leveling cyclinder is hingedly connected between arm right part and job platform lower end, the oil inlet of the solenoid directional control valve is by oil pump
High pressure oil supply is carried out, the first actuator port of solenoid directional control valve is connected with the oil inlet of the first balanced valve by pipeline, electromagnetism
Second actuator port of reversal valve is connected the oil outlet of the first balanced valves of by with the oil inlet of the second balanced valve by pipeline
One pipeline is connected with the rodless cavity of active leveling cyclinder, and the oil outlet of the second balanced valve passes through the second pipeline and active leveling cyclinder
Rod chamber connection, the oil outlet of the first balanced valve also connected by the 3rd pipeline with the rodless cavity of driven leveling cyclinder, second
The oil outlet of balanced valve is also connected by the 4th pipeline with the rod chamber of driven leveling cyclinder, and it is flat to be provided with the 3rd on the 3rd pipeline
Weigh valve, is provided with the 4th balanced valve on the 4th pipeline, the rod chamber of the active leveling cyclinder and driven leveling cyclinder and without bar
Chamber is both provided with for releasing the vent valve for being blended in gas in fluid, and the oil return opening of the solenoid directional control valve is connected with back pressure
Valve, the main oil inlet pipe road where the oil inlet of solenoid directional control valve are connected with flow control valve, first balanced valve, second flat
Weighing apparatus valve, the 3rd balanced valve and the 4th balanced valve are external control type balanced valve, and the first balanced valve and the second balanced valve are respectively provided with just
To opening control port and reversely opening control port, the 3rd balanced valve and the 4th balanced valve are respectively provided with forward direction and open control oil
Mouthful, the reversed of the first balanced valve opens control port with its oil outlet by pipeline connection, and forward direction opens control port and the
The oil inlet of two balanced valves is connected by pipeline connection, the reversed unlatching control port of the second balanced valve with its oil outlet by pipeline
Logical, forward direction opens control port with the oil inlet of the first balanced valve by pipeline connection, and the positive of the 3rd balanced valve opens control
The oil inlet of liquefaction mouth and the 4th balanced valve opens control port and the 3rd balance by pipeline connection, the positive of the 4th balanced valve
The oil inlet of valve is by pipeline connection, and the positive Opening pressure of the 3rd balanced valve and the 4th balanced valve is no more than 2Mpa, and
Three balanced valves and the 4th balanced valve, which are cancelled, reversely opens control port.
In the technical scheme, it is respectively provided with by the rod chamber and rodless cavity that make active leveling cyclinder and driven leveling cyclinder
Vent valve, so can easily bleed off the gas being blended in fluid, so as to avoid gas mixing in fluid into master
Caused by dynamic leveling cyclinder and driven leveling cyclinder the problem of leveling action hysteresis.It is connected on the oil inlet of solenoid directional control valve
There is flow control valve, can guarantee fluid in a stable slow flow velocity supply leveling system, to be avoided that gas is mixed into liquid
In and into closed system.Counterbalance valve is connected on the oil return opening of solenoid directional control valve, cylinder movement can be prevented to extreme position
When, fluid outflow in closed system and cause happening for job platform run-off the straight and hysteresis.By making the 3rd balance
The positive Opening pressure of valve and the 4th balanced valve is not more than 2Mpa, can small pressure wink overhanging in active leveling cyclinder and retraction
Between can change rapidly, so as to which driven adjusting oil cylinder and active leveling cyclinder is made to keep accurately synchronism, be avoided that driven tune
Flat oil cylinder lags behind happening for active leveling cyclinder.By the way that the 3rd balanced valve and the reversed of the 4th balanced valve is made to open control
Hydraulic fluid port is unloaded, in this way, the 3rd balanced valve of energy and the 4th balanced valve are unable to reverse opening, so as to which driven leveling cyclinder be avoided to move to
During extreme position, the 3rd balanced valve or the 4th balanced valve are opened due to hypertonia in the oil inlet and oil return pipeline of driven leveling cyclinder
The fluid in closed system is flowed out, and then is avoided that job platform tilts and what is lagged happens.
As a preferred embodiment, the flow control valve is one-way throttle valve.
Further, because the pressure of system inner fluid can easily make the cavity volume of pipeline become larger, and then can cause oily in system
The reduction of hydraulic coupling, oil liquid pressure is low to prevent the 3rd balanced valve or the 4th balanced valve from normally opening, so will result in from
Dynamic leveling cyclinder cannot be synchronized with the movement with active leveling cyclinder, i.e., can generate hysteresis.So in order to avoid the appearance because of pipeline
The generation of lag situation caused by product chamber becomes larger, the first pipeline, the second pipeline, the 3rd pipeline, the 4th pipeline are using small straight
The high-pressure hose of the low compressed coefficient in footpath is made.
As shown in Fig. 2, as a preferred embodiment, when the solenoid directional control valve is located at middle position, oil inlet is closed, the first work
It is connected after making hydraulic fluid port and the connection of the second actuator port with oil return opening.
As shown in Figure 1, as another preferred embodiment, when the solenoid directional control valve is located at middle position, oil inlet, the first working oil
Mouth, the second actuator port and oil return opening are interconnected.
Description of the drawings
Fig. 1 is the structure diagram of the present invention；
Fig. 2 is the enlarged drawing in C portions in Fig. 1；
Fig. 3 is the enlarged drawing in D portions in Fig. 1；
Fig. 4 is another principle schematic of solenoid directional control valve.
In figure：1st, active leveling cyclinder, the 2, first pipeline, the 3, second pipeline, 4, amplitude oil cylinder, 5, two level arm, 6, operation
Platform, 7, driven leveling cyclinder, 8, level-one arm, the 9, the 4th balanced valve, 10, vent valve, 11, flow control valve, the 12, the 3rd balance
Valve, the 13, the 3rd pipeline, the 14, the 4th pipeline, the 15, second balanced valve, 16, counterbalance valve, the 17, first balanced valve, 18, electromagnetic switch
Valve.
Specific embodiment
The invention will be further described below in conjunction with the accompanying drawings.
As shown in Figures 1 to 4, a kind of overhead working truck leveling system, including level-one arm 8, two level arm 5, operation horizontal
Platform 6 and solenoid directional control valve 18, the left end of the two level arm 5 are hingedly connected to the upper end of level-one arm 8,5 left part of two level arm and level-one
Active leveling cyclinder 1 is hingedly connected between 8 top of arm, is hingedly connected between the middle part of two level arm 5 and the middle part of level-one arm 8
Amplitude oil cylinder 4 is connected to, 5 right part of two level arm and job platform are hingedly connected with driven leveling cyclinder 7, the electricity between 6 lower end
The oil inlet of magnetic reversal valve 18 carries out high pressure oil supply, the first actuator port and the first balanced valve of solenoid directional control valve 18 by oil pump
17 oil inlet is connected by pipeline, and the oil inlet of the second actuator port of solenoid directional control valve 18 and the second balanced valve 15 passes through pipe
The oil outlet of road the first balanced valves of connection 17 is connected by the first pipeline 2 with the rodless cavity of active leveling cyclinder, the second balanced valve
15 oil outlet is connected by the second pipeline 3 with the rod chamber of active leveling cyclinder, and the oil outlet of the first balanced valve 17 also passes through
3rd pipeline 13 is connected with the rodless cavity of driven leveling cyclinder 7, the oil outlet of the second balanced valve 15 also by the 4th pipeline 14 with
The rod chamber connection of driven leveling cyclinder 7, is provided with the 3rd balanced valve 12 on the 3rd pipeline 13, and the is provided on the 4th pipeline 14
The rod chamber and rodless cavity of four balanced valves 9, the active leveling cyclinder 1 and driven leveling cyclinder 7 are both provided with to release mixed
The vent valve 10 of the gas in fluid is closed, the oil return opening of the solenoid directional control valve 18 is connected with counterbalance valve 16, solenoid directional control valve 18
Oil inlet where main oil inlet pipe road be connected with flow control valve 11, first balanced valve 17, the second balanced valve 15, the
Three balanced valves 12 and the 4th balanced valve 9 are external control type balanced valve, and the first balanced valve 17 and the second balanced valve 15 are respectively provided with just
To opening control port and reversely opening control port, the 3rd balanced valve 12 and the 4th balanced valve 9 are respectively provided with forward direction and open control
Hydraulic fluid port, the reversed of the first balanced valve 17 open control port with its oil outlet by pipeline connection, and forward direction opens control port
Oil inlet with the second balanced valve 15 by pipeline connection, with its oil outlet lead to by the reversed unlatching control port of the second balanced valve 15
Pipeline connection is crossed, forward direction opens control port and the oil inlet of the first balanced valve 17 passes through pipeline connection, the 3rd balanced valve 12
It is positive open control port and the oil inlet of the 4th balanced valve 9 passes through pipeline connection, the positive of the 4th balanced valve 9 opens control
The oil inlet of hydraulic fluid port and the 3rd balanced valve 12 opens pressure by pipeline connection, the 3rd balanced valve 12 and the positive of the 4th balanced valve 9
Power is no more than 2Mpa, and the 3rd balanced valve 12 and the 4th balanced valve 9 cancel reversely unlatching control port.By making actively to adjust
The rod chamber and rodless cavity of flat oil cylinder 1 and driven leveling cyclinder 7 are provided with vent valve 10, so can easily bleed off and be blended in
Gas in fluid enters active leveling cyclinder 1 and driven leveling cyclinder 7, because of gas so as to avoid gas mixing in fluid
Body has the compressibility of height, so the generation for the problem of mixed gas easilys lead to leveling action hysteresis in fluid.
Flow control valve 11 is connected on the oil inlet of solenoid directional control valve 18, can guarantee that fluid is supplied with a stable slow flow velocity
Enter closed system to gas in leveling system, is avoided that be mixed into liquid.It is connected on the oil return opening of solenoid directional control valve 18
Counterbalance valve 16, when so can prevent cylinder movement to extreme position, the fluid in closed system flows out and job platform is caused to be sent out
Life tilts and what is lagged happens.It is not more than by the positive Opening pressure for making the 3rd balanced valve 12 and the 4th balanced valve 9
2Mpa can rapidly be changed, so as to make driven adjusting oil cylinder small pressure moment overhanging in active leveling cyclinder 1 and retraction
7 keep the synchronism of height with active leveling cyclinder 1, are avoided that driven leveling cyclinder 7 lags behind the situation of active leveling cyclinder 1
Occur.By the way that the 3rd balanced valve 12 and the reversed of the 4th balanced valve 9 is made to open control port zero load, in this way, can the 3rd balanced valve
12 and the 4th balanced valve 9 can reverse opening, during so as to which driven leveling cyclinder 7 being avoided to move to extreme position, because of driven leveling oil
Hypertonia in the oil inlet and oil return pipeline of cylinder 7 and the 3rd balanced valve 12 or the 4th balanced valve 9 opening are made into fluid in closed system
Outflow, and then it is avoided that job platform 6 tilted and lagged happens.
As a preferred embodiment, the flow control valve 11 is one-way throttle valve.
Because the pressure of system inner fluid can easily make the cavity volume of pipeline become larger, and then system inner fluid pressure can be caused
It reduces, oil liquid pressure is low to prevent the 3rd balanced valve 12 or the 4th balanced valve 9 so will result in driven leveling from normally opening
Oil cylinder 7 cannot be synchronized with the movement with active leveling cyclinder 1, i.e., can generate hysteresis.So in order to avoid the cavity volume because of pipeline
The generation of lag situation caused by becoming larger, the first pipeline 2, the second pipeline 3, the 3rd pipeline 13, the 4th pipeline 14 are using small
The high-pressure hose of the low compressed coefficient of diameter is made.
When the solenoid directional control valve 18 is located at middle position, oil inlet is closed, the first actuator port and the second actuator port
It is connected after connection with oil return opening.
When the solenoid directional control valve 18 is located at middle position, oil inlet, the first actuator port, the second actuator port and oil return opening
It is interconnected.
Operation principle：After high-altitude operation vehicle assembles, first leveling job platform 6, concrete operations are as follows, make electromagnetic switch
18 commutation work of valve is in right position, and hydraulic oil is from oil inlet（P mouthfuls）By flow control valve 11, with the slow flow velocity supply of stabilization the
One balanced valve 17 or the second balanced valve 15, so can guarantee that gas is not easy to be mixed among fluid, the first balanced valve 17 or the second
Fluid is supplied the rodless cavity or rod chamber of driven leveling cyclinder 7 by the 3rd pipeline 13 or the 4th pipeline 14 by balanced valve 15, from
Dynamic 7 rod chamber of leveling cyclinder and rodless cavity are respectively arranged with vent valve 10（This valve is only vented not oil extraction）, driven leveling is flowed into fluid
During oil cylinder 7, the gas in fluid can be discharged by the vent valve 10 in the rod cavity and rodless cavity of driven leveling cyclinder 7, so as to protect
Demonstrate,proving driven leveling cyclinder 7 can reliably act, and then job platform 6 is made to lean forward or swing back, until horizontality.
Again due to being also equipped with vent valve 10 on the rod chamber and rodless cavity of active leveling cyclinder 1, so working as solenoid directional control valve
18 commutation works are at left position, by the fluid of the first balanced valve 17 or the second balanced valve 15 through the first pipeline 2 or the second pipeline 3
Into the rodless cavity or rod chamber of active leveling cyclinder 1, the gas being mixed into fluid can be by the rod chamber of active leveling cyclinder 1
It is discharged with the vent valve 10 on rodless cavity, so as to achieve the purpose that discharge the gas being mixed into fluid before working at height.
After job platform 6 is transferred to level, solenoid directional control valve 18 is restored to middle position, the first balanced valve 17 and the second balanced valve 15
It is turned off.When high-lift operation car, i.e. 4 raising of amplitude oil cylinder, the cylinder rod for driving active leveling cyclinder 1 is overhanging, actively adjusts
The rod chamber of flat oil cylinder 1 presses outward out fluid, and logical liquid crosses the second pipeline 3 and enters the 4th pipeline 14, and then opens the 4th balanced valve 9
Into the rod chamber of driven leveling cyclinder 7, driven leveling cyclinder 7 is made to bounce back, job platform 6 is driven to swing back, realize that two level arm 5 rises
6 self-leveling purpose of job platform when rising.Since this process pipeline gas before working at height has excluded, the first pipeline 2,
The diameter of second pipeline 3, the 3rd pipeline 13 and the 4th pipeline 14 is small, the compressed coefficient is small, so volume changes the small, pressure loss
It is small, along with the Opening pressure of the 3rd balanced valve 12 and the 4th balanced valve 9 is smaller（No more than 2MPa）, so active leveling cyclinder
The fluid of 1 discharge can establish rapidly pressure, and then quick the 3rd balanced valve 12 or the 4th balanced valve 9 opened is into driven leveling oil
Cylinder 7, so that 6 rapid leveling of job platform, solves lag issues.
When driven leveling cyclinder 7 moves to extreme position or larger stress, the 3rd balanced valve 12 or the 4th balanced valve 9
Oil outlet pressure increases, since the 3rd balanced valve 12 or the 4th balanced valve 9 do not have reverse opening function, so driven leveling cyclinder
7 are lockked by the 3rd balanced valve 12 and the 4th balanced valve 9, it is impossible to move, therefore job platform 6 will not run-off the straight.
Due to the oil return opening in solenoid directional control valve 18（T mouthfuls）Counterbalance valve 16 is provided with, T mouthfuls of pressure are relatively low when working at height
When do not open counterbalance valve 16, so the fluid of closed system will not flow out, so as to ensure can guarantee that job platform 6 does not lag not yet
It tilts；When hand-hydraulic leveling, driven leveling cyclinder 7 moves to extreme position, and the 3rd balanced valve 12 or the 4th balanced valve 9 are beaten
It opens, due to being extreme position, rod chamber or rodless cavity towards the T mouths of solenoid directional control valve 18 can not establish pressure, so even if
3rd balanced valve 12 or the 4th balanced valve 9 are opened, and T mouthfuls of pressure are still relatively low and then cannot open counterbalance valve 16, so as to ensure to make
Industry platform 6 is not lagged and not tilted.
When high-altitude operation vehicle is stored, driven leveling cyclinder 7 is pressurized, the 3rd balanced valve 12 or the 4th balanced valve 9 it is fuel-displaced
Mouth pressure increase, since the 3rd balanced valve 12 or the 4th balanced valve 9 do not have reverse opening function, so 7 quilt of driven leveling cyclinder
3rd balanced valve 12 or the 4th balanced valve 9 lock, it is impossible to move, therefore job platform 6 will not run-off the straight.
Claims (5)
1. a kind of overhead working truck leveling system, including level-one arm（8）, two level arm（5）, job platform（6）It is changed with electromagnetism
To valve（18）, the two level arm（5）Left end be hingedly connected to level-one arm（8）Upper end, two level arm（5）Left part and level-one arm
（8）Active leveling cyclinder is hingedly connected between top（1）, two level arm（5）Middle part and level-one arm（8）Middle part between cut with scissors
Grounding connection has amplitude oil cylinder（4）, two level arm（5）Right part and job platform（6）Driven leveling is hingedly connected between lower end
Oil cylinder（7）, the solenoid directional control valve（18）Oil inlet by oil pump carry out high pressure oil supply, solenoid directional control valve（18）The first work
Make hydraulic fluid port and the first balanced valve（17）Oil inlet connected by pipeline, solenoid directional control valve（18）The second actuator port and second
Balanced valve（15）Oil inlet connected by pipeline, the first balanced valve（17）Oil outlet pass through the first pipeline（2）It is adjusted with active
The rodless cavity connection of flat oil cylinder, the second balanced valve（15）Oil outlet pass through the second pipeline（3）There is bar with active leveling cyclinder
Chamber connects, the first balanced valve（17）Oil outlet also pass through the 3rd pipeline（13）With driven leveling cyclinder（7）Rodless cavity connection,
Second balanced valve（15）Oil outlet also pass through the 4th pipeline（14）With driven leveling cyclinder（7）Rod chamber connection, the 3rd pipe
Road（13）On be provided with the 3rd balanced valve（12）, the 4th pipeline（14）On be provided with the 4th balanced valve（9）, which is characterized in that institute
State active leveling cyclinder（1）With driven leveling cyclinder（7）Rod chamber and rodless cavity be both provided with for release be blended in fluid
The vent valve of middle gas（10）, the solenoid directional control valve（18）Oil return opening be connected with counterbalance valve（16）, solenoid directional control valve（18）
Oil inlet where main oil inlet pipe road be connected with flow control valve（11）, first balanced valve（17）, the second balanced valve
（15）, the 3rd balanced valve（12）With the 4th balanced valve（9）It is external control type balanced valve, and the first balanced valve（17）With the second balance
Valve（15）It is respectively provided with positive unlatching control port and reversely opens control port, the 3rd balanced valve（12）With the 4th balanced valve（9）
It is respectively provided with positive unlatching control port, the first balanced valve（17）Reversed open control port and connected with its oil outlet by pipeline
Logical, forward direction opens control port and the second balanced valve（15）Oil inlet pass through pipeline connection, the second balanced valve（15）It is anti-
To control port is opened with its oil outlet by pipeline connection, forward direction opens control port and the first balanced valve（17）Oil inlet
Mouth passes through pipeline connection, the 3rd balanced valve（12）Positive open control port and the 4th balanced valve（9）Oil inlet pass through pipe
Road connects, the 4th balanced valve（9）Positive open control port and the 3rd balanced valve（12）Oil inlet by pipeline connection,
Three balanced valves（12）With the 4th balanced valve（9）Positive Opening pressure no more than 2Mpa, and the 3rd balanced valve（12）With the 4th
Balanced valve（9）Cancel and reversely open control port.
A kind of 2. overhead working truck leveling system according to claim 1, which is characterized in that the flow control valve
（11）For one-way throttle valve.
A kind of 3. overhead working truck leveling system according to claim 1 or 2, which is characterized in that the first pipeline
（2）, the second pipeline（3）, the 3rd pipeline（13）, the 4th pipeline（14）Use the high-pressure hose system of the low compressed coefficient of minor diameter
Into.
A kind of 4. overhead working truck leveling system according to claim 3, which is characterized in that the solenoid directional control valve
（18）During positioned at middle position, oil inlet closing connects after the first actuator port and the connection of the second actuator port with oil return opening.
A kind of 5. overhead working truck leveling system according to claim 3, which is characterized in that the solenoid directional control valve
（18）During positioned at middle position, oil inlet, the first actuator port, the second actuator port and oil return opening are interconnected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611234237.1A CN106678096B (en) | 2016-12-28 | 2016-12-28 | A kind of overhead working truck leveling system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611234237.1A CN106678096B (en) | 2016-12-28 | 2016-12-28 | A kind of overhead working truck leveling system |
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| Publication Number | Publication Date |
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| CN106678096A CN106678096A (en) | 2017-05-17 |
| CN106678096B true CN106678096B (en) | 2018-05-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611234237.1A Active CN106678096B (en) | 2016-12-28 | 2016-12-28 | A kind of overhead working truck leveling system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111547653A (en) * | 2020-05-19 | 2020-08-18 | 三一海洋重工有限公司 | Fork leveling system and method and telescopic arm forklift |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN109264647B (en) * | 2018-11-30 | 2020-04-17 | 中联重科股份有限公司 | Leveling module, leveling hydraulic oil circuit, platform leveling method and platform operation device |
| CN111071967A (en) * | 2020-01-19 | 2020-04-28 | 浙江鼎力机械股份有限公司 | Crank arm leveling structure of crank arm type aerial work platform truck |
| CN113247834B (en) * | 2021-05-10 | 2022-04-26 | 徐工消防安全装备有限公司 | Lifting control system of aerial work platform and aerial work platform |
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| CN111547653A (en) * | 2020-05-19 | 2020-08-18 | 三一海洋重工有限公司 | Fork leveling system and method and telescopic arm forklift |
| CN111547653B (en) * | 2020-05-19 | 2021-10-29 | 三一海洋重工有限公司 | Fork leveling system and method and telescopic arm forklift |
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| CN106678096A (en) | 2017-05-17 |
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Denomination of invention: Hydraulic pressure leveling system of high-altitude operation car Effective date of registration: 20190911 Granted publication date: 20180522 Pledgee: China Merchants Bank Co.,Ltd. Xuzhou Branch Pledgor: XUZHOU HANDLER SPECIAL VEHICLE Co.,Ltd. Registration number: Y2019320000129 |
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