CN209621746U - The hydraulic system and milling machine of milling machine tail-gate - Google Patents
The hydraulic system and milling machine of milling machine tail-gate Download PDFInfo
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- CN209621746U CN209621746U CN201822121124.1U CN201822121124U CN209621746U CN 209621746 U CN209621746 U CN 209621746U CN 201822121124 U CN201822121124 U CN 201822121124U CN 209621746 U CN209621746 U CN 209621746U
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Abstract
This application involves technical field of engineering machinery, more particularly to a kind of hydraulic system and milling machine of milling machine tail-gate, the oil inlet of first control valve connects pressure oil-source, the oil return opening of first control valve connects fuel tank, first actuator port of the first control valve connects the rodless cavity of the first oil cylinder, the second oil cylinder, and the second actuator port of the first control valve connects the rod chamber of the first oil cylinder, the second oil cylinder；Second control valve is arranged on the oil circuit between the rodless cavity of the first actuator port to the first oil cylinder, the second oil cylinder, the on-off or flow between rodless cavity for controlling the first actuator port and the first oil cylinder, the second oil cylinder.The application is able to solve current milling machine tail-gate and is all made of double oil cylinder liftings, inconsistent in the height that lifting will lead to left and right sides tail-gate, eventually leads to mechanical stuck technical problem.
Description
Technical field
This application involves technical field of engineering machinery, in particular to the hydraulic system and milling of a kind of milling machine tail-gate
Planer.
Background technique
Currently, the construction on domestic road surface is more and more the maintenance of road, with the growth in maintenance market, milling machine
As important road maintenance equipment, use is also more and more extensive.
Milling machine mainly passes through milling and planing drum road pavement and is crushed, and is thrown by the particle that milling is got off in the rotation of milling and planing drum
It throws to conveyor belt, particle is delivered in truck by conveyor belt.In order to realize milling and planing drum in rotation by material dish out and in order to
Pollution of the dust of milling out to atmosphere is reduced, thus needs to close the working space of milling and planing drum, thus after milling and planing drum
Face has tail-gate structure to close to the rear part, simultaneously because meeting different milling depth needs, safeguarding to milling and planing drum
Needs, tail-gate must may be implemented to go up and down, at present the tail-gate of milling machine be after being lifted by oil cylinder in a card slot into
Row slides up and down.
When milling machine is constructed, tail-gate is, according to the different depth of milling, to carry out automatic floating simultaneously in automatic floating state
The particle that milling is got off is collected.Simultaneously when overhauling milling and planing drum, need to rise tail-gate, in order to milling
Bulging maintenance.
Current tail-gate is all made of double oil cylinder liftings, due to asynchronous, load inconsistent, the meeting of oil cylinder in lifting process
Cause the height of left and right sides tail-gate inconsistent, eventually leads to mechanical stuck.
Utility model content
The hydraulic system and milling machine for being designed to provide a kind of milling machine tail-gate of the application, to solve current milling machine
Tail-gate is all made of double oil cylinder liftings, inconsistent in the height that lifting will lead to left and right sides tail-gate, eventually leads to mechanical stuck
Technical problem.
To achieve the goals above, the application uses following technical scheme:
One aspect provided by the present application provides a kind of hydraulic system of milling machine tail-gate, including control valve, for realizing
The first oil cylinder and the second oil cylinder, controller and the length for acquiring first oil cylinder and the second oil cylinder of the tail-gate lifting
The sensor of signal is spent, the controller is connect with the sensor and control valve, for controlling the movement of the control valve；
The control valve includes the first control valve and the second control valve；
The oil inlet of first control valve connects pressure oil-source, and the oil return opening of first control valve connects fuel tank, institute
State the first control valve the first actuator port connect the first oil cylinder, the second oil cylinder rodless cavity, the second of first control valve
Actuator port connects the rod chamber of first oil cylinder, the second oil cylinder；
Second control valve be arranged in first actuator port to first oil cylinder, the second oil cylinder rodless cavity it
Between oil circuit on, the on-off between rodless cavity for controlling first actuator port and first oil cylinder, the second oil cylinder
Or flow, and/or, second actuator port to first oil cylinder, the second oil cylinder, which is arranged in, in second control valve has
On oil circuit between rod cavity, between the rod chamber for controlling second actuator port and first oil cylinder, the second oil cylinder
On-off or flow.
Preferably, second control valve is three position three-way change valve, and setting is in first actuator port to described the
One oil cylinder, the second oil cylinder rodless cavity between oil circuit on, the first hydraulic fluid port of the three position three-way change valve and first work
Make hydraulic fluid port connection, the second hydraulic fluid port of the three position three-way change valve is connected to the rodless cavity of first oil cylinder, and described three three
The third hydraulic fluid port of logical reversal valve is connected to the rodless cavity of second oil cylinder, wherein in the middle position of the three position three-way change valve,
First hydraulic fluid port of the three position three-way change valve, the second hydraulic fluid port, the conducting of third hydraulic fluid port；Or,
Second control valve be three position three-way change valve, setting second actuator port to first oil cylinder,
On oil circuit between the rod chamber of second oil cylinder, the first hydraulic fluid port of the three position three-way change valve and second actuator port connect
Logical, the second hydraulic fluid port of the three position three-way change valve is connected to the rod chamber of first oil cylinder, the three position three-way change valve
Third hydraulic fluid port be connected to the rod chamber of second oil cylinder, wherein in the middle position of the three position three-way change valve, described three
First hydraulic fluid port of three-way diverter valve, the second hydraulic fluid port, the conducting of third hydraulic fluid port.
Preferably, second control valve includes the first solenoid valve and second solenoid valve, and the first solenoid valve setting exists
On first actuator port to the oil circuit between first oil cylinder rodless cavity, the second solenoid valve is arranged described first
On actuator port to the oil circuit between the rodless cavity of the second oil cylinder, first solenoid valve and second solenoid valve are changed for bi-bit bi-pass
To valve or adjustable throttling；Or,
First solenoid valve is arranged on second actuator port to the oil circuit between first cylinder rod chamber,
The second solenoid valve is arranged on second actuator port to the oil circuit between the rod chamber of the second oil cylinder, first electricity
Magnet valve and second solenoid valve are bi-bit bi-pass reversal valve or adjustable throttling.
Preferably, second control valve includes the first solenoid valve and second solenoid valve, and the first solenoid valve setting exists
On first actuator port to the oil circuit between first oil cylinder rodless cavity, the second solenoid valve is arranged described second
On actuator port to the oil circuit between the rod chamber of the second oil cylinder；Or, first solenoid valve is arranged in second working oil
On mouth to the oil circuit between first cylinder rod chamber, the second solenoid valve is arranged in first actuator port to second
On oil circuit between the rodless cavity of oil cylinder；First solenoid valve and second solenoid valve are bi-bit bi-pass reversal valve or adjustable throttling
Valve.
It preferably, further include third control valve, third control valve setting is in first actuator port to described the
One oil cylinder, the second oil cylinder rodless cavity between oil circuit on；Or third control valve setting second actuator port extremely
First oil cylinder, the second oil cylinder rod chamber between oil circuit on, the third control valve is used to control the on-off of oil circuit.
Preferably, the third control valve is two-position two-way electromagnetic directional valve, in the two-position two-way electromagnetic directional valve
Under first station, two hydraulic fluid ports of the two-position two-way electromagnetic directional valve are connected, the of the two-position two-way electromagnetic directional valve
Under two stations, two hydraulic fluid port one-way conductions of the two-position two-way electromagnetic directional valve.
Preferably, further include the first overflow valve, one end of first overflow valve connect with the oil return opening, the other end with
The first actuator port connection.
Preferably, further include the second overflow valve, one end of second overflow valve connect with the oil return opening, the other end with
The second actuator port connection.
Further aspect of the application provides a kind of milling machine, the hydraulic system including above-mentioned milling machine tail-gate, described
One end of first oil cylinder and the second oil cylinder is connect with the rack of the milling machine, the other end of first oil cylinder and the second oil cylinder
It is connect with tail-gate.
The control method of the hydraulic system of above-mentioned milling machine tail-gate, comprising:
During the first oil cylinder and the second oil cylinder drive tail-gate to rise:
If the sensor detects that the length difference of the first oil cylinder and the second oil cylinder is greater than first threshold, the controller control
Make second control valve, the rodless cavity or rod chamber for the oil cylinder for keeping length shorter are closed, make the longer oil cylinder of length without bar
Chamber and rod chamber are held on；
If the sensor detects that the length difference of the first oil cylinder and the second oil cylinder is less than second threshold, the controller control
Second control valve is made, the rodless cavity of the first oil cylinder and the second oil cylinder and rod chamber are both turned on；
During the first oil cylinder and the second oil cylinder drive tail-gate decline:
If the sensor detects that the length difference of the first oil cylinder and the second oil cylinder is greater than first threshold, the controller control
Make second control valve, make the longer oil cylinder of length rodless cavity or rod chamber close, the oil cylinder for keeping length shorter without bar
Chamber and rod chamber are held on；
If the sensor detects that the length difference of the first oil cylinder and the second oil cylinder is less than second threshold, the controller control
Second control valve is made, the rodless cavity of the first oil cylinder and the second oil cylinder and rod chamber are both turned on；
Wherein, the first threshold is greater than the second threshold.
Technical solution provided by the present application can achieve it is following the utility model has the advantages that
By the hydraulic system and milling machine of a kind of milling machine tail-gate provided herein, when tail-gate is rising or falling
During a, either the oil cylinder as caused by pipeline is asynchronous or loads caused oil cylinder rise and fall clamping stagnation, can lead to
The movement for stopping one of oil cylinder is crossed, the length of another oil cylinder is adjusted, avoids the stroke difference due to two oil cylinders
It is excessive, lead to mechanical self-latching of the tail-gate in card slot, even side therein has been caught in particle and has led to the clamping stagnation of the side, also by
It is high-pressure oil passage in adjustment oil circuit, then the particle can be squeezed broken by force or squeezed out, overall process adjust automatically is dropped without manually participating in
Low labor intensity reduces the skill requirement to operator, high degree of automation.
The additional technical feature and its advantage of the application will illustrate more obvious in following description content, or pass through
The concrete practice of the application is recognized that.
Detailed description of the invention
In order to illustrate more clearly of the technical solution of the application specific embodiment, specific embodiment will be described below
Needed in attached drawing be briefly described.It should be evident that the accompanying drawings in the following description is some implementations of the application
Mode for those of ordinary skill in the art without creative efforts, can also be according to these attached drawings
Obtain other attached drawings.
Fig. 1 is a kind of schematic diagram of embodiment of the hydraulic system of milling machine tail-gate provided by the embodiments of the present application；
Fig. 2 is the schematic diagram of the another embodiment of the hydraulic system of milling machine tail-gate provided by the embodiments of the present application.
Appended drawing reference:
The second control valve of 1-；
The first oil cylinder of 2-；
The second oil cylinder of 3-；
The first control valve of 4-；
5- third control valve；
The second overflow valve of 6-；
7- fuel tank；
The first overflow valve of 8-；
9- second solenoid valve；
The first solenoid valve of 10-.
Specific embodiment
It is clearly and completely described below in conjunction with technical solution of the attached drawing to the application, it is clear that described implementation
Example is some embodiments of the present application, instead of all the embodiments.Based on the embodiment in the application, ordinary skill
Personnel's every other embodiment obtained without making creative work, shall fall in the protection scope of this application.
In the description of the present application, it should be noted that term " center ", "upper", "lower", "left", "right", "vertical",
The orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" be based on the orientation or positional relationship shown in the drawings, merely to
Convenient for describe the application and simplify description, rather than the device or element of indication or suggestion meaning must have a particular orientation,
It is constructed and operated in a specific orientation, therefore should not be understood as the limitation to the application.In addition, term " first ", " second ",
" third " is used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance.
In the description of the present application, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, can also can be indirectly connected through an intermediary
Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood at this with concrete condition
Concrete meaning in application.
As shown in Figs. 1-2, the one aspect of the embodiment of the present application provides a kind of hydraulic system of milling machine tail-gate, including
Control valve, for realizing the Ffirst cylinder 2 and the second oil cylinder 3, controller and for acquiring the Ffirst cylinder 2 of tail-gate lifting
With the sensor of the length signals of the second oil cylinder 3, controller is connect with sensor and control valve, for controlling the dynamic of control valve
Make；
Control valve includes the first control valve and the second control valve；
The oil inlet of first control valve connects pressure oil-source, and the oil return opening of the first control valve connects fuel tank 7, the first control valve
The first actuator port connection Ffirst cylinder 2, the second oil cylinder 3 rodless cavity, the second actuator port connection the of the first control valve
The rod chamber of one oil cylinder 2, the second oil cylinder 3；
Second control valve be arranged in the first actuator port to Ffirst cylinder 2, the second oil cylinder 3 rodless cavity between oil circuit
On, the on-off or flow between rodless cavity for controlling the first actuator port and Ffirst cylinder 2, the second oil cylinder 3, and/or,
Second control valve be arranged in the second actuator port to Ffirst cylinder 2, the second oil cylinder 3 rod chamber between oil circuit on, for controlling
Make the second actuator port and Ffirst cylinder 2, the second oil cylinder 3 rod chamber between on-off or flow.
In the present solution, can control the rod chamber or rodless cavity of Ffirst cylinder 2 and the second oil cylinder 3 by the first control valve
Oil inlet, to realize the promotion or decline of milling machine tail-gate, when tail-gate is during promotion and decline, appearance is asynchronous and exists
When clamping stagnation risk, by the second control valve, it can control the fast oil cylinder stopping movement of lifting, another oil cylinder allowed to continue to move
Make, realizes that the left and right of tail-gate lifting synchronizes, that is, by the hydraulic system of milling machine tail-gate provided by the embodiment of the present application, lead to
It crosses and through and off between different oil circuits, solution are drawn due to pipeline, load etc. to be realized to the first control valve and the second control valve
The Ffirst cylinder 2 and the nonsynchronous problem of the second oil cylinder 3 risen, and then solve the problems, such as that tail-gate lifting in milling machine two sides is nonsynchronous.
When it is implemented, if during Ffirst cylinder 2 and the second oil cylinder 3 drive tail-gate to rise: if sensor detects
It is greater than first threshold to the length difference of Ffirst cylinder 2 and the second oil cylinder 3, controller controls the second control valve, keeps length shorter
The rodless cavity or rod chamber of oil cylinder are closed, and the rodless cavity of the longer oil cylinder of length and rod chamber are held on；If sensor is examined
The length difference for measuring Ffirst cylinder 2 and the second oil cylinder 3 is less than second threshold, and controller controls the second control valve, makes Ffirst cylinder 2
It is both turned on the rodless cavity and rod chamber of the second oil cylinder 3；Wherein, first threshold is greater than second threshold.
During Ffirst cylinder 2 and the second oil cylinder 3 drive tail-gate decline: if sensor detect Ffirst cylinder 2 and
The length difference of second oil cylinder 3 be greater than first threshold, controller control the second control valve, make the longer oil cylinder of length rodless cavity or
Rod chamber is closed, and the rodless cavity and rod chamber for the oil cylinder for keeping length shorter are held on；If sensor detect Ffirst cylinder 2 and
The length difference of second oil cylinder 3 is less than second threshold, and controller controls the second control valve, makes Ffirst cylinder 2 and the second oil cylinder 3
Rodless cavity and rod chamber are both turned on；Wherein, first threshold is greater than second threshold.
It therefore, can be with the synchronization action of real-time control Ffirst cylinder 2 and the second oil cylinder 3 by the second control valve.
First control valve and the second control valve can be single valve, or valve group, it is preferable that as shown in Figure 1, second
Control valve be three position three-way change valve 1, be arranged in the first actuator port to Ffirst cylinder 2, the second oil cylinder 3 rodless cavity between
On oil circuit, the first hydraulic fluid port of three position three-way change valve 1 is connected to the first actuator port, the second hydraulic fluid port of three position three-way change valve 1
It being connected to the rodless cavity of Ffirst cylinder 2, the third hydraulic fluid port of three position three-way change valve 1 is connected to the rodless cavity of the second oil cylinder 3,
In, in the middle position of three position three-way change valve 1, the first hydraulic fluid port of three position three-way change valve 1, the second hydraulic fluid port, the conducting of third hydraulic fluid port；
Or, as a kind of equivalent alternative,
Second control valve is three position three-way change valve 1, and the second actuator port is arranged in Ffirst cylinder 2, second oil cylinder 3
On oil circuit between rod chamber, the first hydraulic fluid port of three position three-way change valve is connected to the second actuator port, three position three-way change valve
The second hydraulic fluid port be connected to the rod chamber of Ffirst cylinder 2, the third hydraulic fluid port of three position three-way change valve and the second oil cylinder 3 have bar
Chamber connection, wherein in the middle position of three position three-way change valve, the first hydraulic fluid port, the second hydraulic fluid port, the third hydraulic fluid port of three position three-way change valve
Conducting.
In addition to making the second control valve three position three-way change valve 1, also it may be preferred that making the second control valve as shown in Fig. 2
Including the first solenoid valve 10 and second solenoid valve 9, and the first solenoid valve 10 and second solenoid valve 9 is made preferably to carry out following cloth
It sets:
First solenoid valve 10 is arranged on the first actuator port to the oil circuit between Ffirst cylinder 2 rodless cavity, the second electromagnetism
Valve 9 is arranged on the oil circuit between the rodless cavity of the first actuator port to the second oil cylinder 3；Or,
First solenoid valve 10 is arranged on the second actuator port to the oil circuit between Ffirst cylinder 2 rod chamber, the second electricity
Magnet valve 9 is arranged on the oil circuit between the rod chamber of the second actuator port to the second oil cylinder 3；Or,
First solenoid valve 10 is arranged on the first actuator port to the oil circuit between Ffirst cylinder 2 rodless cavity, the second electricity
Magnet valve 9 is arranged on the oil circuit between the rod chamber of the second actuator port to the second oil cylinder 3；Or,
First solenoid valve 10 is arranged on the second actuator port to the oil circuit between Ffirst cylinder 2 rod chamber, the second electricity
Magnet valve 9 is arranged on the oil circuit between the rodless cavity of the first actuator port to the second oil cylinder 3.
It is further preferred that the first solenoid valve 10 and second solenoid valve 9 are bi-bit bi-pass reversal valve or adjustable throttling.
Preferably, the hydraulic system of milling machine tail-gate provided by the embodiment of the present application further includes third control valve 5, third
Control valve 5 be arranged in the first actuator port to Ffirst cylinder 2, the second oil cylinder 3 rodless cavity between oil circuit on；Or third control
Valve 5 be arranged in the second actuator port to Ffirst cylinder 2, the second oil cylinder 3 rod chamber between oil circuit on, third control valve 5 use
In the on-off of control oil circuit.
Preferably, third control valve 5 is two-position two-way electromagnetic directional valve, in the first station of two-position two-way electromagnetic directional valve
Under, two hydraulic fluid ports of two-position two-way electromagnetic directional valve are connected, under the second station of two-position two-way electromagnetic directional valve, bi-bit bi-pass
Two hydraulic fluid port one-way conductions of solenoid directional control valve.
Preferably, the hydraulic system of milling machine tail-gate provided by the embodiment of the present application further includes the first overflow valve 8, and first
One end of overflow valve 8 is connect with oil return opening, the other end is connect with the first actuator port.In the oil circuit being connected to the first actuator port
When pressure is excessive, hydraulic oil is back to fuel tank 7 by the first overflow valve 8.
Preferably, the hydraulic system of milling machine tail-gate provided by the embodiment of the present application further includes the second overflow valve 6, and second
One end of overflow valve 6 is connect with oil return opening, the other end is connect with the second actuator port.In the oil circuit being connected to the second actuator port
When pressure is excessive, hydraulic oil is back to fuel tank 7 by the second overflow valve 6.
In addition, sensor, which can be all, may be implemented the sensor of length of oil cylinder detection, such as stay wire sensor and ultrasound
Wave sensor etc., it is preferable that Ffirst cylinder 2 and the second oil cylinder 3 can be the oil cylinder of included length detection.
Further aspect of the application provides a kind of milling machine, the hydraulic system including above-mentioned milling machine tail-gate, and first
The rack of one end and milling machine of oil cylinder 2 and the second oil cylinder 3 connects, and the other end and tail-gate of Ffirst cylinder 2 and the second oil cylinder 3 connect
It connects.
The control method of the hydraulic system of above-mentioned milling machine tail-gate is provided in terms of the third of the application, comprising:
During Ffirst cylinder 2 and the second oil cylinder 3 drive tail-gate to rise:
If sensor detects that the length difference of Ffirst cylinder 2 and the second oil cylinder 3 is greater than first threshold, controller control second
Control valve, the rodless cavity or rod chamber for the oil cylinder for keeping length shorter are closed, and the rodless cavity and rod chamber of the longer oil cylinder of length are made
It is held on；
If sensor detects that the length difference of Ffirst cylinder 2 and the second oil cylinder 3 is less than second threshold, controller control second
Control valve is both turned on the rodless cavity of Ffirst cylinder 2 and the second oil cylinder 3 and rod chamber；
During Ffirst cylinder 2 and the second oil cylinder 3 drive tail-gate decline:
If sensor detects that the length difference of Ffirst cylinder 2 and the second oil cylinder 3 is greater than first threshold, controller control second
Control valve closes the rodless cavity of the longer oil cylinder of length or rod chamber, the rodless cavity and rod chamber of the oil cylinder for keeping length shorter
It is held on；
If sensor detects that the length difference of Ffirst cylinder 2 and the second oil cylinder 3 is less than second threshold, controller control second
Control valve is both turned on the rodless cavity of Ffirst cylinder 2 and the second oil cylinder 3 and rod chamber；
Wherein, first threshold is greater than second threshold.
By the control method of the hydraulic system of milling machine tail-gate provided by the embodiment of the present application, when tail-gate rising or
During decline, either the oil cylinder as caused by pipeline is asynchronous or loads caused oil cylinder rise and fall clamping stagnation,
The length of another oil cylinder can be adjusted, the stroke due to two oil cylinders is avoided by the movement of the one of oil cylinder of stopping
Difference is excessive, leads to mechanical self-latching of the tail-gate in card slot, even side therein has been caught in particle and has led to the clamping stagnation of the side,
Also since adjustment oil circuit is high-pressure oil passage, then the particle can be squeezed broken by force or squeezed out, overall process adjust automatically is without artificial ginseng
Enter, reduces labor intensity, reduce the skill requirement to operator, high degree of automation.
Finally, it should be noted that the above various embodiments is only to illustrate the technical solution of the application, rather than its limitations；To the greatest extent
Pipe is described in detail the application referring to foregoing embodiments, those skilled in the art should understand that: its according to
So be possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features into
Row equivalent replacement；And these are modified or replaceed, each embodiment technology of the application that it does not separate the essence of the corresponding technical solution
The range of scheme.
In addition, it will be appreciated by those of skill in the art that although above-mentioned some embodiments include institute in other embodiments
Including certain features rather than other feature, but the combination of the feature of different embodiment means in scope of the present application
Within and form different embodiments.For example, in claims above, embodiment claimed it is any it
One can in any combination mode come using.In addition, the information disclosed in the background technology section is intended only to deepen pair
The understanding of the general background technology of the application, and be not construed as recognizing or implying in any form that information composition has been this
The prior art well known to the technical staff of field.
Claims (9)
1. the hydraulic system of milling machine tail-gate, which is characterized in that including control valve, for realizing the first oil of tail-gate lifting
Cylinder (2) and the second oil cylinder (3), controller and the length signals for acquiring first oil cylinder (2) and the second oil cylinder (3)
Sensor, the controller are connect with the sensor and control valve, for controlling the movement of the control valve；
The control valve includes the first control valve and the second control valve；
The oil inlet of first control valve connects pressure oil-source, and the oil return opening of first control valve connects fuel tank (7), described
First actuator port of the first control valve connects the rodless cavity of the first oil cylinder (2), the second oil cylinder (3), first control valve
Second actuator port connects the rod chamber of first oil cylinder (2), the second oil cylinder (3)；
Second control valve is arranged in first actuator port to first oil cylinder (2), the rodless cavity of the second oil cylinder (3)
Between oil circuit on, for control first actuator port and first oil cylinder (2), the second oil cylinder (3) rodless cavity it
Between on-off or flow, and/or, second control valve setting is in second actuator port to first oil cylinder (2), the
On oil circuit between the rod chamber of two oil cylinders (3), for controlling second actuator port and first oil cylinder (2), second
On-off or flow between the rod chamber of oil cylinder (3).
2. the hydraulic system of milling machine tail-gate according to claim 1, which is characterized in that
Second control valve is three position three-way change valve (1), is arranged in first actuator port to first oil cylinder
(2), on the oil circuit between the rodless cavity of the second oil cylinder (3), the first hydraulic fluid port and described first of the three position three-way change valve (1)
Actuator port connection, the second hydraulic fluid port of the three position three-way change valve (1) are connected to the rodless cavity of first oil cylinder (2), institute
The third hydraulic fluid port for stating three position three-way change valve (1) is connected to the rodless cavity of second oil cylinder (3), wherein at described three three
The middle position of logical reversal valve (1), the first hydraulic fluid port of the three position three-way change valve (1), the second hydraulic fluid port, the conducting of third hydraulic fluid port；Or,
Second control valve is three position three-way change valve, and setting is in second actuator port to first oil cylinder (2), the
On oil circuit between the rod chamber of two oil cylinders (3), the first hydraulic fluid port of the three position three-way change valve and second actuator port
Connection, the second hydraulic fluid port of the three position three-way change valve are connected to the rod chamber of first oil cylinder (2), and the 3-position-3-way changes
It is connected to the third hydraulic fluid port of valve with the rod chamber of second oil cylinder (3), wherein in the middle position of the three position three-way change valve,
First hydraulic fluid port of the three position three-way change valve, the second hydraulic fluid port, the conducting of third hydraulic fluid port.
3. the hydraulic system of milling machine tail-gate according to claim 1, which is characterized in that
Second control valve includes the first solenoid valve (10) and second solenoid valve (9), and the first solenoid valve (10) setting exists
On first actuator port to the oil circuit between the first oil cylinder (2) rodless cavity, the second solenoid valve (9) is arranged in institute
It states on the first actuator port to the oil circuit between the rodless cavity of the second oil cylinder (3), first solenoid valve (10) and the second electromagnetism
Valve (9) is bi-bit bi-pass reversal valve or adjustable throttling；Or,
Second control valve includes the first solenoid valve (10) and second solenoid valve (9), and the first solenoid valve (10) setting exists
On second actuator port to the oil circuit between the first oil cylinder (2) rod chamber, the second solenoid valve (9) is arranged in institute
It states on the second actuator port to the oil circuit between the rod chamber of the second oil cylinder (3), first solenoid valve (10) and the second electromagnetism
Valve (9) is bi-bit bi-pass reversal valve or adjustable throttling.
4. the hydraulic system of milling machine tail-gate according to claim 1, which is characterized in that
Second control valve includes the first solenoid valve (10) and second solenoid valve (9), and first solenoid valve is arranged described
On first actuator port to the oil circuit between the first oil cylinder (2) rodless cavity, the second solenoid valve is arranged described second
On actuator port to the oil circuit between the rod chamber of the second oil cylinder (3)；Or, the first solenoid valve setting is in second work
On hydraulic fluid port to the oil circuit between the first oil cylinder (2) rod chamber, the second solenoid valve is arranged in first actuator port
To the oil circuit between the rodless cavity of the second oil cylinder (3)；First solenoid valve and second solenoid valve are bi-bit bi-pass reversal valve
Or adjustable throttling.
5. the hydraulic system of milling machine tail-gate according to claim 1-4, which is characterized in that
It further include third control valve (5), the third control valve (5) is arranged in first actuator port to first oil cylinder
(2), on the oil circuit between the rodless cavity of the second oil cylinder (3)；Or the third control valve (5) is arranged in second actuator port
To first oil cylinder (2), the second oil cylinder (3) rod chamber between oil circuit on, the third control valve (5) is for controlling oil
The on-off on road.
6. the hydraulic system of milling machine tail-gate according to claim 5, which is characterized in that the third control valve (5) is
Two-position two-way electromagnetic directional valve, under the first station of the two-position two-way electromagnetic directional valve, the bi-bit bi-pass electromagnetic switch
Two hydraulic fluid ports of valve are connected, under the second station of the two-position two-way electromagnetic directional valve, the two-position two-way electromagnetic directional valve
Two hydraulic fluid port one-way conductions.
7. the hydraulic system of milling machine tail-gate according to claim 1, which is characterized in that it further include the first overflow valve (8),
One end of first overflow valve (8) is connect with the oil return opening, the other end is connect with first actuator port.
8. the hydraulic system of milling machine tail-gate according to claim 1, which is characterized in that it further include the second overflow valve (6),
One end of second overflow valve (6) is connect with the oil return opening, the other end is connect with second actuator port.
9. a kind of milling machine, which is characterized in that including the hydraulic of the milling machine tail-gate as described in any one of claim 1-8
One end of system, first oil cylinder (2) and the second oil cylinder (3) is connect with the rack of the milling machine, first oil cylinder (2)
It is connect with the other end of the second oil cylinder (3) with tail-gate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN109404356A (en) * | 2018-12-17 | 2019-03-01 | 三汽车制造有限公司 | The hydraulic system and its control method of milling machine tail-gate, milling machine |
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| CN109404356A (en) * | 2018-12-17 | 2019-03-01 | 三汽车制造有限公司 | The hydraulic system and its control method of milling machine tail-gate, milling machine |
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