CN109185246A - Hydraulic control system and aerial working platform vehicle - Google Patents
Hydraulic control system and aerial working platform vehicle Download PDFInfo
- Publication number
- CN109185246A CN109185246A CN201811397599.1A CN201811397599A CN109185246A CN 109185246 A CN109185246 A CN 109185246A CN 201811397599 A CN201811397599 A CN 201811397599A CN 109185246 A CN109185246 A CN 109185246A
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- executing agency
- actuator port
- control valve
- main control
- valve
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- 230000007246 mechanism Effects 0.000 claims abstract description 67
- 230000000694 effects Effects 0.000 claims abstract description 15
- 239000012530 fluid Substances 0.000 claims description 127
- 239000003921 oil Substances 0.000 description 116
- 239000002828 fuel tank Substances 0.000 description 5
- 239000010720 hydraulic oil Substances 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000007257 malfunction Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000009440 infrastructure construction Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
-
- 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
-
- 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
- B66F11/044—Working platforms suspended from booms
-
- 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
-
- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/205—Systems with pumps
-
- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
- F15B2211/71—Multiple output members, e.g. multiple hydraulic motors or cylinders
Landscapes
- 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)
- Fluid-Pressure Circuits (AREA)
Abstract
The present invention relates to a kind of hydraulic control system and aerial working platform vehicles, and wherein hydraulic control system includes: the first executing agency (1)；Second executing agency (2)；Main control valve block (3), for controlling the commutation of the commutation of the oil feeding line of the first executing agency (1) and the oil feeding line of the second executing agency (2)；With switching mechanism (4), it is arranged between main control valve block (3) and the first executing agency (1) and the second executing agency (2), for switching between the first working position and the second working position, in the first working position, the first executing agency (1) is driven to act under main control valve block (3) and the collective effect of switching mechanism (4)；In the second working position, the second executing agency (2) is driven to act under main control valve block (3) and the collective effect of switching mechanism (4).The present invention solves the problems, such as to need when increasing by the second executing agency while being equipped with two kinds of main control valve blocks, effectively save cost.
Description
Technical field
The present invention relates to hydraulic system technical field more particularly to a kind of hydraulic control system and aerial working platform vehicles.
Background technique
With the fast development of infrastructure construction in china, the demand and ownership of engineering machinery also in rapid growth,
At the same time, the operating environment faced by engineering machinery is more harsh, working condition is increasingly complex, to engineering machinery
Requirement is also higher and higher.
In numerous engineering machinery, aerial working platform vehicle is the important component of engineering machinery, complicated for reply
High altitude operation environment, the type of aerial working platform vehicle also gradually increases.Existing arm-type high-altitude operation platform cart mainly has
Two kinds of frame modes: cranking arm one is band, and another kind is without cranking arm, both vehicles are all widely used.It compares
In the vehicle that without the vehicle cranked arm, band is cranked arm while increasing certain operation height, operate more flexible, it is easier to
Realization accurately controls.When close to operative goals, while keeping principal arm amplitude constant, by changing the lifting cranked arm, returning
Pendulum increases the stability and flexibility of aerial working platform vehicle, ensure that the operation of operating personnel to reach operation height
Comfort reduces the energy consumption of aerial working platform vehicle.
For with the aerial working platform vehicle cranked arm, need to increase for controlling luffing of cranking arm in main control valve block
Control valve do not need to increase in main control valve block for controlling and for without the aerial working platform vehicle cranked arm
It cranks arm the control valve of luffing.It does not include luffing of cranking arm since the price of the main control valve block including luffing control valve of cranking arm is higher
The price of the main control valve block of control valve is relatively low, therefore for save the cost, usually flat with the high altitude operation cranked arm
Main control valve block of the configuration including luffing control valve of cranking arm in trolley, and configured in without the aerial working platform vehicle cranked arm
It does not include the main control valve block of luffing control valve of cranking arm.
But above-mentioned way can bring following problems:
One, it for the producer, needs to purchase the main control valve block including luffing control valve of cranking arm simultaneously and does not include
It cranks arm the main control valve block of luffing control valve, to meet sum that band is cranked arm without the production requirement for two vehicle cranked arm, and
The main control valve block of two kinds of forms is purchased simultaneously, and purchase cost and production maintenance cost can all increase, and it is public to be unfavorable for production
The capital turnover and cost control of department, restrict the development of company；
Two, for the user, in the aerial working platform vehicle cranked arm due to configuration be include luffing of cranking arm
The main control valve block of control valve, therefore the price of this platform truck is higher, the promotion of purchase cost, it is meant that higher cost pressure
Power, and the element of main control valve block increases, and greatly improves the failure rate of element, failure mode is more changeable, is unfavorable for equipment
Care and maintenance；
Three, for aerial working platform vehicle industry, aerial work platform is a kind of safer, more convenient construction hand
Section, the raising of aerial working platform vehicle cost are proposed higher economic requirement to the producer and user, are unfavorable for high-altitude
The popularization and use of operation platform cart industry.
It should be noted that the information for being disclosed in background of invention part is merely intended to increase to totality of the invention
The understanding of background, and be not construed as recognizing or imply in any form the information constitute by those skilled in the art public affairs
The prior art known.
Summary of the invention
The purpose of the present invention is to propose to a kind of hydraulic control system and aerial working platform vehicle, solve in the prior art for
It is needed with the aerial working platform vehicle cranked arm and without the aerial working platform vehicle cranked arm while being equipped with two kinds of master control valve blocks
The problem of, save the cost.
To achieve the above object, the present invention provides a kind of hydraulic control systems, comprising:
First executing agency；
Second executing agency；
Main control valve block, for controlling the commutation of the oil feeding line of the first executing agency and the fuel feeding oil of the second executing agency
The commutation on road；With
Switching mechanism is arranged between main control valve block and the first executing agency and the second executing agency, for the
Switch between one working position and the second working position, in the first working position, in the collective effect of main control valve block and switching mechanism
The movement of the first executing agency of lower driving；In the second working position, driven under main control valve block and the collective effect of switching mechanism
The movement of second executing agency.
Optionally, switching mechanism is in the first working position, the first actuator port of main control valve block and the first executing agency
The connection of the first actuator port, the second actuator port of main control valve block is connected to the second actuator port of the first executing agency,
And second executing agency the first actuator port and the second actuator port simultaneously be connected to the first actuator port of main control valve block
Or disconnect, so that the second executing agency is failure to actuate.
Optionally, switching mechanism is in the first working position, the first actuator port of main control valve block and the first executing agency
The connection of the first actuator port, the second actuator port of main control valve block is connected to the second actuator port of the first executing agency,
And hydraulic control system further includes the first control valve group being arranged between switching mechanism and the second executing agency, the first control valve
Group when switching mechanism is in the first working position for keeping the first actuator port of the second executing agency and the second actuator port same
When with the first actuator port one-way conduction of main control valve block so that the second executing agency is failure to actuate.
Optionally, the first control valve group includes:
First balanced valve is arranged including the first overflow valve and the first check valve being connected in parallel in switching mechanism and second
Between first actuator port of executing agency；With
Second balanced valve is arranged including the second overflow valve being connected in parallel and second one-way valve in switching mechanism and second
Between second actuator port of executing agency；
Wherein, the oil outlet of the first overflow valve is connected to the control terminal of the second overflow valve, the oil outlet of the second overflow valve with
The control terminal of first overflow valve is connected to.
Optionally, switching mechanism is in the second working position, the first actuator port of main control valve block and the second executing agency
The connection of the first actuator port, the second actuator port of main control valve block is connected to the second actuator port of the second executing agency,
And first executing agency the first actuator port and the second actuator port simultaneously be connected to the second actuator port of main control valve block
Or disconnect, so that the first executing agency is failure to actuate.
Optionally, switching mechanism is in the second working position, the first actuator port of main control valve block and the second executing agency
The connection of the first actuator port, the second actuator port of main control valve block is connected to the second actuator port of the second executing agency,
And hydraulic control system further includes the second control valve group being arranged between switching mechanism and the first executing agency, the second control valve
Group when switching mechanism is in the second working position for keeping the first actuator port of the first executing agency and the second actuator port same
When with the second actuator port one-way conduction of main control valve block so that the first executing agency is failure to actuate.
Optionally, the second control valve group includes:
Third balanced valve is arranged including the third overflow valve and third check valve being connected in parallel in switching mechanism and first
Between first actuator port of executing agency；With
4th balanced valve is arranged including the 4th overflow valve being connected in parallel and the 4th check valve in switching mechanism and first
Between second actuator port of executing agency；
Wherein, the oil outlet of third overflow valve is connected to the control terminal of the 4th overflow valve, the oil outlet of the 4th overflow valve with
The control terminal of third overflow valve is connected to.
Optionally, switching mechanism includes switching valve, and switching valve includes the first hydraulic fluid port, the second hydraulic fluid port and third hydraulic fluid port, and first
Hydraulic fluid port connect with the first actuator port of main control valve block and connect with the first actuator port of the second executing agency, the second hydraulic fluid port
It is connect with the first actuator port of the first executing agency and the second executing agency and the second actuator port, third hydraulic fluid port and main control
Second actuator port of valve block is connected and is connect with the second actuator port of the first executing agency, in the first working position, first
Hydraulic fluid port is connected to the second hydraulic fluid port, the truncation of third hydraulic fluid port；In the second working position, the truncation of the first hydraulic fluid port, the second hydraulic fluid port and third are oily
Mouth connection.
To achieve the above object, the present invention also provides a kind of aerial working platform vehicles, including above-mentioned hydraulic control system
System.
Optionally, aerial working platform vehicle further include job platform, connect with job platform cranking arm and being connect with cranking arm
Large arm, the first executing agency is that driving is cranked arm the amplitude oil cylinder of cranking arm of luffing, and the second executing agency is driving job platform pendulum
Dynamic platform oscillating oil cylinder.
Based on the above-mentioned technical proposal, the present invention can drive first together with main control valve block by setting switching mechanism
Executing agency's movement or the movement of the second executing agency of driving, are realized under the premise of not changing the structure of main control valve block to the
The control of one executing agency and the second executing agency solves to need while being equipped with when increasing by the second executing agency in the prior art
The problem of two kinds of main control valve blocks, still for the user, can greatly save into either for the producer
This.
Detailed description of the invention
The drawings described herein are used to provide a further understanding of the present invention, constitutes part of this application, this hair
Bright illustrative embodiments and their description are used to explain the present invention, and are not constituted improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is the hydraulic schematic diagram of hydraulic control system one embodiment of the present invention.
In figure:
1, the first executing agency；2, the second executing agency；3, main control valve block；31, reversal valve；32, the first control valve；
33, the second control valve；34, overflow valve；35, unloading valve；4, switching mechanism；41, switching valve；5, the first control valve group；51, first
Overflow valve；52, the first check valve；53, the second overflow valve；54, second one-way valve；6, the second control valve group；61, third overflow
Valve；62, third check valve；63, the 4th overflow valve；64, the 4th check valve；7, third executing agency；8, the 4th executing agency；9,
Check valve；10, hydraulic pump.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, is clearly and completely retouched to the technical solution in embodiment
It states.Obviously, described embodiment is only a part of the embodiments of the present invention, instead of all the embodiments.Based on this hair
Bright embodiment, every other implementation obtained by those of ordinary skill in the art without making creative efforts
Example, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that, term " center ", " transverse direction ", " longitudinal direction ", "front", "rear",
The orientation or positional relationship of the instructions such as "left", "right", "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outside" is
It is based on the orientation or positional relationship shown in the drawings, is merely for convenience of description of the present invention and simplification of the description, rather than instruction or dark
Show that signified device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as pair
The limitation of the scope of the present invention.
As shown in Figure 1, in one embodiment of hydraulic control system provided by the invention, which includes
First executing agency 1, the second executing agency 2, main control valve block 3 and switching mechanism 4, main control valve block 3 are held for controlling first
The commutation of the oil feeding line of the commutation and the second executing agency 2 of the oil feeding line of row mechanism 1, switching mechanism 4 are arranged in main control
Between valve block 3 and the first executing agency 1 and the second executing agency 2, switching mechanism 4 is used to work in the first working position and second
Switch between position, in the first working position, drives first to execute machine under main control valve block 3 and the collective effect of switching mechanism 4
Structure 1 acts；In the second working position, the second executing agency 2 is driven under main control valve block 3 and the collective effect of switching mechanism 4
Movement.
By the way that switching mechanism 4 is arranged, the first executing agency 1 can be driven to act or drive together with main control valve block 3
The movement of second executing agency 2, is realized under the premise of not changing the structure of main control valve block 3 to the first executing agency 1 and second
The control of executing agency 2 solves to need when increasing by the second executing agency in the prior art while being equipped with two kinds of main control valve blocks
The problem of, either for the producer, still for the user, cost can be greatlyd save.Moreover, in the reality
It applies in example, when increasing the second executing agency 2, utilizes master employed in original only system of the first executing agency 1
Valve block is controlled, the switching between the first executing agency 1 and the second executing agency 2 is realized by switching mechanism, avoids and matches
The more complicated main control valve block of structure is set, element failure rate is reduced, maintains easily.
Optionally, main control valve block 3 includes reversal valve 31, and reversal valve 31 includes oil inlet, oil return opening, the first actuator port
With the second actuator port, oil inlet is connected to the oil inlet P in main control valve block 3, on oil return opening and main control valve block 3
Oil return inlet T connection, the first actuator port are connected to the first hydraulic fluid port PRL in main control valve block 3, the second actuator port and master
Control the second hydraulic fluid port PRR connection in valve block 3.
Reversal valve 31 includes middle position, the first working position Y1a and the second working position Y1b.At middle position, oil inlet truncation,
Its first actuator port and the second actuator port are connected to the return port；In the first working position Y1a, oil inlet and its first
Actuator port connection, oil return opening are connected to its second actuator port；In the second working position Y1b, oil inlet and its second
Actuator port connection, oil return opening are connected to its first actuator port.
It is additionally provided with the first control valve 32 and the second control valve 33 in main control valve block 3, the first control valve 32 is for controlling the
The movement of three executing agencies 7, the second control valve 33 are used to control the movement of the 4th executing agency 8.
Overflow valve 34 and unloading valve 35 are additionally provided in main control valve block 3.
The specific constructive form of switching mechanism 4 can there are many selections, as long as can be realized its effect.
Optionally, switching mechanism 4 includes switching valve 41, and switching valve 41 includes the first hydraulic fluid port, the second hydraulic fluid port and third hydraulic fluid port,
First hydraulic fluid port connect with the first actuator port of main control valve block 3 and connect with the first actuator port of the second executing agency 2, the
Two hydraulic fluid ports are connect with the first actuator port of the first executing agency 1 and the second executing agency 2 and the second actuator port, third hydraulic fluid port
It connect with the second actuator port of main control valve block 3 and is connect with the second actuator port of the first executing agency 1, in the first work
When position, the first hydraulic fluid port is connected to the second hydraulic fluid port, the truncation of third hydraulic fluid port；In the second working position, the truncation of the first hydraulic fluid port, the second hydraulic fluid port
It is connected to third hydraulic fluid port.
Switching valve 41 can be two-position three way magnetic valve, and the structure of switching mechanism 4 is simple, and cost is relatively low.
As shown in Figure 1, switching mechanism 4 includes hydraulic fluid port V1, hydraulic fluid port V2, hydraulic fluid port J1, hydraulic fluid port J2, hydraulic fluid port PR1 and hydraulic fluid port PR2.
Wherein, hydraulic fluid port V1 is connected to the hydraulic fluid port PRL in main control valve block 3, and hydraulic fluid port V2 is connected to hydraulic fluid port PRR, the control of hydraulic fluid port PR1 and first
The hydraulic fluid port A connection of valve group 5, hydraulic fluid port PR2 are connect with the hydraulic fluid port B of the first control valve group 5, the oil of hydraulic fluid port J1 and the second control valve group 6
Mouth A connection, hydraulic fluid port J2 are connect with the hydraulic fluid port B of the second control valve group 6.And the first hydraulic fluid port and the first control of hydraulic fluid port V1 and switching valve 41
The hydraulic fluid port A of valve group 5 processed is connected to, and hydraulic fluid port V2 is connected to the third hydraulic fluid port of the hydraulic fluid port B of the second control valve group 6 and switching valve 41, is switched
Second hydraulic fluid port of valve 41 is connected to the hydraulic fluid port A of the hydraulic fluid port B of the first control valve group 5 and the second control valve group 6.
In an alternative embodiment, switching mechanism 4 is in the first working position, the first working oil of main control valve block 3
Mouth is connected to the first actuator port of the first executing agency 1, the second actuator port of main control valve block 3 and the first executing agency 1
The connection of the second actuator port, and the first actuator port of the second executing agency 2 and the second actuator port are simultaneously and main control valve
First actuator port of block 3 is connected to or disconnects, so that the second executing agency 2 is failure to actuate.
The first actuator port and the second actuator port of second executing agency 2 work with the first of main control valve block 3 simultaneously
When hydraulic fluid port is connected to, the pressure at two ends of the second executing agency 2 is identical, therefore the second executing agency 2 is failure to actuate.Second executing agency 2
The first actuator port and the second actuator port when being disconnected simultaneously with the first actuator port of main control valve block 3, second executes machine
The pressure at two ends of structure 2 is lower, therefore the second executing agency 2 is failure to actuate.
Setting can make the safety of hydraulic control system higher in this way, avoid causing the when the first executing agency 1 acts
The independence of the first executing agency 1 and the movement of the second executing agency 2 is realized in the malfunction of two executing agencies 2.
In another alternative embodiment, switching mechanism 4 is in the first working position, the first work of main control valve block 3
Hydraulic fluid port is connected to the first actuator port of the first executing agency 1, the second actuator port of main control valve block 3 and the first executing agency
1 the second actuator port connection, and hydraulic control system further includes being arranged between switching mechanism 4 and the second executing agency 2
First control valve group 5, the first control valve group 5 are used to make when switching mechanism 4 is in the first working position the of the second executing agency 2
One actuator port and the second actuator port the first actuator port one-way conduction with main control valve block 3 simultaneously, such second executes
The both ends of mechanism 2 cannot achieve oil return, therefore the second executing agency 2 may be implemented and be failure to actuate.
As shown in Figure 1, the first control valve group 5 includes the first balanced valve and the second balanced valve, the first balanced valve includes parallel connection
The first overflow valve 51 and the first check valve 52 of connection, are arranged in the first actuator port of switching mechanism 4 and the second executing agency 2
Between；Second balanced valve includes the second overflow valve 53 being connected in parallel and second one-way valve 54, is arranged in switching mechanism 4 and second
Between second actuator port of executing agency 2；Wherein, the control terminal of the oil outlet of the first overflow valve 51 and the second overflow valve 53 connects
Logical, the oil outlet of the second overflow valve 53 is connected to the control terminal of the first overflow valve 51.
The first work with main control valve block 3 simultaneously in the first actuator port of the second executing agency 2 and the second actuator port
When making hydraulic fluid port connection, when the first actuator port of main control valve block 3 is oil inlet, into the A oral fluid pressure oil of the first control valve group 5
The first actuator port of the second executing agency 2 can be flowed to by the first check valve 52, although passing through the B of the first control valve group 5
Oral fluid pressure oil can enter the right side control terminal of the first overflow valve 51, but the A oral fluid pressure oil for entering the first control valve group 5 can also be with
Enter the left side control terminal of the first overflow valve 51, and the left side control of the first overflow valve 51 by the oil outlet of the first overflow valve 51
The active force there are also spring is held, the sum of spring force and A mouthfuls of pressure suffered by the left side control terminal of the first overflow valve 51 are greater than it
The sum of return pressure suffered by the control terminal of right side and B mouthfuls of pressure, therefore the first overflow valve 51 cannot be connected, the second executing agency
2 the first actuator port can only cannot be executed by 51 oil return of the first overflow valve second by 52 oil inlet of the first check valve
When the left end oil liquid of mechanism 2 reaches a certain amount of, it cannot be further continued for through 52 oil inlet of the first check valve.Similarly, into
The B oral fluid pressure oil of one control valve group 5 can flow to the second actuator port of the second executing agency 2 by second one-way valve 54, though
The left side control terminal of the second overflow valve 53 can so be entered by the A oral fluid pressure oil of the first control valve group 5, but enter the first control
The B oral fluid pressure oil of valve group 5 can also enter the right side control terminal of the second overflow valve 53 by the oil outlet of the second overflow valve 53, and
The right side control terminal of second overflow valve 53 is there are also the active force of spring, spring force suffered by the right side control terminal of the second overflow valve 53
It is greater than the sum of return pressure and A mouthfuls of pressure suffered by its left side control terminal with the sum of B mouthfuls of pressure, therefore the second overflow valve 53 is not
It can be connected, the second actuator port of the second executing agency 2 can only cannot pass through the second overflow valve by 54 oil inlet of second one-way valve
53 oil returns, and the right end oil liquid of the second executing agency 2 reach it is a certain amount of when, cannot be further continued for by second one-way valve 54 into
Oil, therefore the both ends of the second executing agency 2 energy one-way conduction, but keep the second executing agency 2 inactive because being unable to oil return
Make.
And in the first actuator port of the second executing agency 2 and the second actuator port simultaneously with main control valve block 3 first
When actuator port connects, when the first actuator port of main control valve block 3 is oil return opening, in the first balanced valve and the second balanced valve
Under holding effect, the both ends of the second executing agency 2 are unable to oil return, therefore the second executing agency 2 is failure to actuate.
In an alternative embodiment, switching mechanism 4 is in the second working position, the first working oil of main control valve block 3
Mouth is connected to the first actuator port of the second executing agency 2, the second actuator port of main control valve block 3 and the second executing agency 2
The connection of the second actuator port, and the first actuator port of the first executing agency 1 and the second actuator port are simultaneously and main control valve
Second actuator port of block 3 is connected to or disconnects, so that the first executing agency 1 is failure to actuate.
The first actuator port and the second actuator port of first executing agency 1 work with the second of main control valve block 3 simultaneously
When hydraulic fluid port is connected to, the pressure at two ends of the first executing agency 1 is identical, therefore the first executing agency 1 is failure to actuate.First executing agency 1
The first actuator port and the second actuator port when being disconnected simultaneously with the second actuator port of main control valve block 3, first executes machine
The pressure at two ends of structure 1 is lower, therefore the first executing agency 1 is failure to actuate.
Setting can make the safety of hydraulic control system higher in this way, avoid causing the when the second executing agency 2 acts
The independence of the first executing agency 1 and the movement of the second executing agency 2 is realized in the malfunction of one executing agency 1.
In another alternative embodiment, switching mechanism 4 is in the second working position, the first work of main control valve block 3
Hydraulic fluid port is connected to the first actuator port of the second executing agency 2, the second actuator port of main control valve block 3 and the second executing agency
2 the second actuator port connection, and hydraulic control system further includes being arranged between switching mechanism 4 and the first executing agency 1
Second control valve group 6, the second control valve group 6 are used to make when switching mechanism 4 is in the second working position the of the first executing agency 1
One actuator port and the second actuator port the second actuator port one-way conduction with main control valve block 3 simultaneously, such first executes
The both ends of mechanism 1 cannot achieve oil return, therefore the first executing agency 1 may be implemented and be failure to actuate.
Optionally, the second control valve group 6 includes third balanced valve and the 4th balanced valve, and third balanced valve includes being connected in parallel
Third overflow valve 61 and third check valve 62, be arranged in switching mechanism 4 and the first executing agency 1 the first actuator port it
Between；4th balanced valve includes the 4th overflow valve 63 and the 4th check valve 64 being connected in parallel, and setting is held in switching mechanism 4 with first
Between second actuator port of row mechanism 1；Wherein, the control terminal of the oil outlet of third overflow valve 61 and the 4th overflow valve 63 connects
Logical, the oil outlet of the 4th overflow valve 63 is connected to the control terminal of third overflow valve 61.
The second work with main control valve block 3 simultaneously in the first actuator port of the first executing agency 1 and the second actuator port
When making hydraulic fluid port connection, when the second actuator port of main control valve block 3 is oil inlet, into the A oral fluid pressure oil of the second control valve group 6
The first actuator port of the first executing agency 1 can be flowed to by third check valve 62, although passing through the B of the second control valve group 6
Oral fluid pressure oil can enter the right side control terminal of third overflow valve 61, but the A oral fluid pressure oil for entering the second control valve group 6 can also be with
Enter the left side control terminal of third overflow valve 61, and the left side control of third overflow valve 61 by the oil outlet of third overflow valve 61
The active force there are also spring is held, the sum of spring force and A mouthfuls of pressure suffered by the left side control terminal of third overflow valve 61 are greater than it
The sum of return pressure suffered by the control terminal of right side and B mouthfuls of pressure, therefore third overflow valve 61 cannot be connected, the first executing agency
1 the first actuator port can only cannot be executed by 61 oil return of third overflow valve first by 62 oil inlet of third check valve
When the left end oil liquid of mechanism 1 reaches a certain amount of, it cannot be further continued for through 62 oil inlet of third check valve.Similarly, into
The B oral fluid pressure oil of two control valve groups 6 can flow to the second actuator port of the first executing agency 1 by the 4th check valve 64, though
The left side control terminal of the 4th overflow valve 63 can so be entered by the A oral fluid pressure oil of the second control valve group 6, but enter the second control
The B oral fluid pressure oil of valve group 6 can also enter the right side control terminal of the 4th overflow valve 63 by the oil outlet of the 4th overflow valve 63, and
The right side control terminal of 4th overflow valve 63 is there are also the active force of spring, spring force suffered by the right side control terminal of the 4th overflow valve 63
It is greater than the sum of return pressure and A mouthfuls of pressure suffered by its left side control terminal with the sum of B mouthfuls of pressure, therefore the 4th overflow valve 63 is not
It can be connected, the second actuator port of the first executing agency 1 can only cannot pass through the 4th overflow valve by 64 oil inlet of the 4th check valve
63 oil returns, and the right end oil liquid of the first executing agency 1 reach it is a certain amount of when, cannot be further continued for by the 4th check valve 64 into
Oil, therefore the both ends of the first executing agency 1 energy one-way conduction, but keep the first executing agency 1 inactive because being unable to oil return
Make.
And in the first actuator port of the first executing agency 1 and the second actuator port simultaneously with main control valve block 3 second
When actuator port connects, when the second actuator port of main control valve block 3 is oil return opening, in third balanced valve and the 4th balanced valve
Under holding effect, the both ends of the first executing agency 1 are unable to oil return, therefore the first executing agency 1 is failure to actuate.
Based on above-mentioned hydraulic control system, the present invention also proposes a kind of aerial working platform vehicle, the aerial work platform
Vehicle includes above-mentioned hydraulic control system.
Optionally, aerial working platform vehicle further include job platform, connect with job platform cranking arm and being connect with cranking arm
Large arm, the first executing agency 1 is that driving is cranked arm the amplitude oil cylinder of cranking arm of luffing, and the second executing agency 2 is driving job platform
The platform oscillating oil cylinder of swing.
Optionally, third executing agency 7 is the large arm amplitude oil cylinder for driving large arm luffing.
Optionally, the 4th executing agency 8 be rotary motor, rotary motor for drive large arm, crank arm with job platform into
Row revolution.
In the control system without the aerial working platform vehicle cranked arm, main control valve block 3 includes reversal valve 31, first
Control valve 32, the second control valve 33, overflow valve 34 and unloading valve 35；In with the aerial working platform vehicle cranked arm, using this
The hydraulic control system that inventive embodiments provide, can still utilize original control without the aerial working platform vehicle cranked arm
Main control valve block 3 in system has by setting switching mechanism 4 to realize to the driving of crank arm amplitude oil cylinder and oscillating oil cylinder
Effect solves the problems, such as to need while being equipped with two kinds of main control valve blocks, cost is greatly saved, also helps and facilitates later maintenance.
It is flat to be equally applicable to high altitude operation for positive technical effect possessed by hydraulic control system in above-mentioned each embodiment
Trolley, which is not described herein again.
1 pair of hydraulic control system of the present invention and one embodiment of aerial working platform vehicle is worked with reference to the accompanying drawing
Journey is illustrated:
As shown in Figure 1, obtaining the left end Y1a of reversal valve 31 when aerial working platform vehicle executes luffing of cranking arm and stretches electric, changing
Oil circuit is connected to the left end of valve 31, switching valve 41 must not be electric, and the right end of switching valve 41 is connected.The high pressure oil warp that hydraulic pump 10 is confessed
Cross check valve 9, hydraulic fluid port P, reversal valve 31, hydraulic fluid port PRL, hydraulic fluid port V1, switching valve 41, hydraulic fluid port J1, the second control valve group 6 hydraulic fluid port A,
Third check valve 62 enters the big chamber for amplitude oil cylinder of cranking arm, and oil cylinder stretches out.Small chamber hydraulic oil is controlled by the 4th overflow valve 63, second
Hydraulic fluid port B, hydraulic fluid port J2, switching valve 41, hydraulic fluid port V2, hydraulic fluid port PRR, reversal valve 31 and the hydraulic fluid port T of valve group 6 processed flow back to fuel tank.Meanwhile it is high
Hydraulic fluid port A, first check valve 52 of the pressure oil through the first control valve group 5 enter the left end of platform oscillating oil cylinder, and by the first control
The hydraulic fluid port B of valve group 5, second one-way valve 54 enter the right end of platform oscillating oil cylinder, but the first overflow valve 51 and the second overflow valve 53
It is in the state that cannot be connected, two chambers of platform oscillating oil cylinder all cannot achieve oil return, therefore platform oscillating oil cylinder does not move
Make.
When luffing contracting is cranked arm in aerial working platform vehicle execution, the right end Y1b of reversal valve 31 is made to obtain electric, the right side of reversal valve 31
Logical oil circuit is terminated, switching valve 41 must not be electric, and the right end of switching valve 41 is connected.The high pressure oil that hydraulic pump 10 is confessed by check valve 9,
Hydraulic fluid port P, reversal valve 31, hydraulic fluid port PRR, hydraulic fluid port V2, switching valve 41, hydraulic fluid port J2, the hydraulic fluid port B of the second control valve group 6, the 4th check valve
64 enter the small chamber for amplitude oil cylinder of cranking arm, and oil cylinder retracts.Big chamber hydraulic oil is by third overflow valve 61, the second control valve group 6
Hydraulic fluid port A, hydraulic fluid port J1, switching valve 41, hydraulic fluid port V1, hydraulic fluid port PRL, reversal valve 31 and hydraulic fluid port T flow back to fuel tank.Meanwhile platform swings oil
The both ends of cylinder are connected to oil return inlet T, are remained stationary under the balance holding effect of the first control valve group 5.
When aerial working platform vehicle executes platform oscillating oil cylinder clockwise oscillation, obtain the left end Y1a of reversal valve 31 electric,
Oil circuit is connected in the left end of reversal valve 31, and switching valve 41 obtains electric, the left end connection of switching valve 41, the high pressure oil warp that hydraulic pump 10 is confessed
It is single to cross check valve 9, hydraulic fluid port P, reversal valve 31, hydraulic fluid port PRL, hydraulic fluid port V1, hydraulic fluid port PR1, the hydraulic fluid port A of the first control valve group 5 and first
Enter the left end of platform oscillating oil cylinder to valve 52.The hydraulic oil of platform oscillating oil cylinder right end is controlled by the second overflow valve 53, first
Hydraulic fluid port B, hydraulic fluid port PR2, switching valve 41, hydraulic fluid port V2, hydraulic fluid port PRR, reversal valve 31 and the hydraulic fluid port T of valve group 5 processed flow back to fuel tank, make platform
Oscillating oil cylinder rotates clockwise.Meanwhile two chambers of amplitude oil cylinder of cranking arm are connected to oil return inlet T, in the flat of the second control valve group 6
It is remained stationary under weighing apparatus holding effect.
When aerial working platform vehicle executes platform oscillating oil cylinder counter-clockwise swing, obtain the right end Y1b of reversal valve 31 electric,
The right end of reversal valve 31 connects oil circuit, and switching valve 41 obtains electric, the left end connection of switching valve 41.The high pressure oil warp that hydraulic pump 10 is confessed
Cross check valve 9, hydraulic fluid port P, reversal valve 31, hydraulic fluid port PRR, hydraulic fluid port V2, switching valve 41, hydraulic fluid port PR2, the first control valve group 5 hydraulic fluid port
B, second one-way valve 54 enters the right end of platform oscillating oil cylinder.The hydraulic oil of platform oscillating oil cylinder left end passes through the first overflow valve
51, the hydraulic fluid port A, hydraulic fluid port PR1, hydraulic fluid port V1, hydraulic fluid port PRL, reversal valve 31 and hydraulic fluid port T of the first control valve group 5 flow back to fuel tank, make to swing
Oil cylinder rotates counterclockwise.Meanwhile hydraulic fluid port A, third check valve 62 of the high pressure oil through the second control valve group 6 enter amplitude oil cylinder of cranking arm
Left end, and hydraulic fluid port B Jing Guo the second control valve group 6, the 4th check valve 64 enter the right end for amplitude oil cylinder of cranking arm, but third is overflow
Stream valve 61 and the 4th overflow valve 63 are in the state that cannot be connected, and two chambers of amplitude oil cylinder of cranking arm all cannot achieve oil return, because
This amplitude oil cylinder of cranking arm does not act.
When cranking arm amplitude oil cylinder and platform oscillating oil cylinder does not work, the left and right ends of reversal valve 31 all must not electricity,
Under the action of centralizing spring, reversal valve 31 is placed in Median Function, and high pressure oil flows back to fuel tank through overflow valve 34 or unloading valve 35.
Pass through the explanation to hydraulic control system of the present invention and multiple embodiments of aerial working platform vehicle, it can be seen that this
Invention hydraulic control system and aerial working platform vehicle embodiment at least have the advantages that one or more of:
1, by setting switching mechanism, it can make to have and crank arm and without two kinds to crank arm to avoid replacement main control valve block
Your job platform vehicle of high-altitude realizes the unification of main control valve block, avoids being equipped with two kinds of main control valve blocks simultaneously, reduces cost, together
When easy to produce and later maintenance；
2, change of cranking arm can be controlled simultaneously by increasing switching mechanism in the hydraulic system used in without the vehicle cranked arm
Width oil cylinder and platform oscillating oil cylinder, structural change are smaller；
3, it is equipped with balance valve group between switching mechanism and the first executing agency and the second executing agency, both may be implemented each
From the independence of movement, and the executing agency being failure to actuate can be locked, guarantee safety.
Finally it should be noted that: the above embodiments are merely illustrative of the technical scheme of the present invention and are not intended to be limiting thereof；To the greatest extent
The present invention is described in detail with reference to preferred embodiments for pipe, it should be understood by those ordinary skilled in the art that: still
It can modify to a specific embodiment of the invention or some technical features can be equivalently replaced；Without departing from this hair
The spirit of bright technical solution should all cover within the scope of the technical scheme claimed by the invention.
Claims (10)
1. a kind of hydraulic control system characterized by comprising
First executing agency (1)；
Second executing agency (2)；
Main control valve block (3), commutation and described second for controlling the oil feeding line of first executing agency (1) execute machine
The commutation of the oil feeding line of structure (2)；With
Switching mechanism (4), setting are executed in the main control valve block (3) and first executing agency (1) and described second
Between mechanism (2), for switching between the first working position and the second working position, in first working position, in the master
First executing agency (1) is driven to act under the collective effect of control valve block (3) and the switching mechanism (4)；Described
When two working positions, the second execution machine is driven under the collective effect of the main control valve block (3) and the switching mechanism (4)
Structure (2) movement.
2. hydraulic control system according to claim 1, which is characterized in that the switching mechanism (4) is in first work
When making position, the first actuator port of the first actuator port of the main control valve block (3) and first executing agency (1) connects
Logical, the second actuator port of the main control valve block (3) is connected to the second actuator port of first executing agency (1), and
The first actuator port and the second actuator port of second executing agency (2) simultaneously with the main control valve block (3) first
Actuator port connection disconnects, so that second executing agency (2) is failure to actuate.
3. hydraulic control system according to claim 1, which is characterized in that the switching mechanism (4) is in first work
When making position, the first actuator port of the first actuator port of the main control valve block (3) and first executing agency (1) connects
Logical, the second actuator port of the main control valve block (3) is connected to the second actuator port of first executing agency (1), and
The hydraulic control system further includes the first control being arranged between the switching mechanism (4) and second executing agency (2)
Valve group (5) processed, first control valve group (5) are described for making when the switching mechanism (4) is in first working position
The first actuator port and the second actuator port of second executing agency (2) work with the first of the main control valve block (3) simultaneously
Hydraulic fluid port one-way conduction, so that second executing agency (2) is failure to actuate.
4. hydraulic control system according to claim 3, which is characterized in that first control valve group (5) includes:
First balanced valve is arranged including the first overflow valve (51) and the first check valve (52) being connected in parallel in the switching machine
Between structure (4) and the first actuator port of second executing agency (2)；With
Second balanced valve is arranged including the second overflow valve (53) being connected in parallel and second one-way valve (54) in the switching machine
Between structure (4) and the second actuator port of second executing agency (2)；
Wherein, the oil outlet of first overflow valve (51) is connected to the control terminal of second overflow valve (53), and described second
The oil outlet of overflow valve (53) is connected to the control terminal of first overflow valve (51).
5. hydraulic control system according to claim 1, which is characterized in that the switching mechanism (4) is in second work
When making position, the first actuator port of the first actuator port of the main control valve block (3) and second executing agency (2) connects
Logical, the second actuator port of the main control valve block (3) is connected to the second actuator port of second executing agency (2), and
The first actuator port and the second actuator port of first executing agency (1) simultaneously with the main control valve block (3) second
Actuator port connection disconnects, so that first executing agency (1) is failure to actuate.
6. hydraulic control system according to claim 1, which is characterized in that the switching mechanism (4) is in second work
When making position, the first actuator port of the first actuator port of the main control valve block (3) and second executing agency (2) connects
Logical, the second actuator port of the main control valve block (3) is connected to the second actuator port of second executing agency (2), and
The hydraulic control system further includes the second control being arranged between the switching mechanism (4) and first executing agency (1)
Valve group (6) processed, second control valve group (6) are described for making when the switching mechanism (4) is in second working position
The first actuator port and the second actuator port of first executing agency (1) work with the second of the main control valve block (3) simultaneously
Hydraulic fluid port one-way conduction, so that first executing agency (1) is failure to actuate.
7. hydraulic control system according to claim 6, which is characterized in that second control valve group (6) includes:
Third balanced valve is arranged including the third overflow valve (61) and third check valve (62) being connected in parallel in the switching machine
Between structure (4) and the first actuator port of first executing agency (1)；With
4th balanced valve is arranged including the 4th overflow valve (63) being connected in parallel and the 4th check valve (64) in the switching machine
Between structure (4) and the second actuator port of first executing agency (1)；
Wherein, the oil outlet of the third overflow valve (61) is connected to the control terminal of the 4th overflow valve (63), and the described 4th
The oil outlet of overflow valve (63) is connected to the control terminal of the third overflow valve (61).
8. described in any item hydraulic control systems according to claim 1~7, which is characterized in that the switching mechanism (4) includes
Switching valve (41), the switching valve (41) include the first hydraulic fluid port, the second hydraulic fluid port and third hydraulic fluid port, first hydraulic fluid port and the master
It the first actuator port connection of control valve block (3) and is connect with the first actuator port of second executing agency (2), described the
The first actuator port and second executing agency (2) and the second actuator port of two hydraulic fluid ports and first executing agency (1)
Connection, the third hydraulic fluid port connect with the second actuator port of the main control valve block (3) and with first executing agency (1)
The second actuator port connection, in first working position, first hydraulic fluid port is connected to second hydraulic fluid port, the third
Hydraulic fluid port truncation；In second working position, the first hydraulic fluid port truncation, second hydraulic fluid port is connected to the third hydraulic fluid port.
9. a kind of aerial working platform vehicle, which is characterized in that including hydraulic control system as described in any one of claims 1 to 8
System.
10. aerial working platform vehicle according to claim 9, which is characterized in that further include job platform and the operation
Platform connection crank arm and the large arm with the connection of cranking arm, first executing agency (1) they are to crank arm luffing described in driving
It cranks arm amplitude oil cylinder, second executing agency (2) is the platform oscillating oil cylinder that the driving job platform is swung.
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| CN201811397599.1A CN109185246B (en) | 2018-11-22 | 2018-11-22 | Hydraulic control system and aerial work platform truck |
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| CN201811397599.1A CN109185246B (en) | 2018-11-22 | 2018-11-22 | Hydraulic control system and aerial work platform truck |
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