CN208221227U - A kind of high pressure automatic control device of integrated preferential velocity's control - Google Patents
A kind of high pressure automatic control device of integrated preferential velocity's control Download PDFInfo
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- CN208221227U CN208221227U CN201820835177.7U CN201820835177U CN208221227U CN 208221227 U CN208221227 U CN 208221227U CN 201820835177 U CN201820835177 U CN 201820835177U CN 208221227 U CN208221227 U CN 208221227U
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Abstract
The utility model discloses a kind of high pressure automatic control device of integrated preferential velocity's control, including valve body, guide's pilot operated valve device and constant pressure valve are equipped in valve body；Guide's pilot operated valve device includes guide's hydraulic control valve chamber；Guide's pilot operated valve device is intracavitary to be equipped with guide's hydraulic control spool, and guide's hydraulic control spool outer peripheral surface is equipped with the first slot and the second slot；Constant pressure valve includes constant pressure valve valve opening, and constant pressure valve valve pocket is equipped in constant pressure valve valve opening, and constant pressure valve core is equipped in constant pressure valve valve pocket, and the outer peripheral surface of constant pressure valve core is equipped with third slot；It is equipped with gap between constant pressure valve core and constant pressure valve valve opening, is equipped with third flow channel in constant pressure valve core；Constant pressure valve valve pocket is equipped with the 4th runner.When the pilot pressure that there is the utility model guide oil to provide is lower, engineering machinery host executive component still the advantages of being switched fast speed and torque, and it is at low cost, be not easy that motor high pressure is made to automatically control performance decline so that engineering machinery using effect is good.
Description
Technical field
The utility model belongs to the control element field of oblique-axis axial piston variable motro more particularly to one kind integrate it is excellent
The high pressure automatic control device of first speed control.
Background technique
Oblique-axis axial piston variable motro (abbreviation motor) is common hydraulic actuator, the torque output one of motor
Aspect relies primarily on the variation adjust automatically discharge capacity by motor load pressure, to reach the mesh for changing motor output torque
, guide's oil liquid pressure that entire spool tail portion is on the other hand acted on by changing external input makes motor displacement change
To adapt to the requirement of output torque.
The function of adjusting in terms of two above is arranged on the same control valve, when motor load pressure rise and is reached
When variable starting point, since valve step is there are difference in areas, valve is gradually opened, and the oil liquid of motor oil inlet flows into motor by control valve
Variable piston big end, motor change under the action of variable piston to huge discharge, achieve the purpose that increase motor output torque；
When guide oil pressure of the increasing action in spool tail portion, the starting point of motor automatic pressure control itself is decreased, i.e., every increasing
Add the pilot pressure of 0.1MPa, automatic pressure control will decline 1.7MPa, ratio 1/17, so for automatic control
Pressure requirements are very high, and when pilot pressure is lower, engineering machinery host executive component can not be switched fast speed and torque,
On the other hand since between pilot pressure and automatic pressure control 1/17 ratio is bigger than normal, cause the control mode to guide's oil liquid
The control accuracy requirement of pressure is very high, can generate higher cost；On the other hand, since the spool tail portion of guide's oil liquid effect is
Choke-out chamber, if tail portion oil liquid is not discharged in time in control process, the high pressure that will reduce motor itself is automatically controlled
Performance is unfavorable for the use of engineering machinery.
Therefore, existing control valve exists when the pilot pressure that guide oil provides is lower, and engineering machinery host is held
Units can not be switched fast the defect of speed and torque, and it is at high cost, be easy that motor high pressure is made to automatically control performance decline
So that engineering machinery using effect is poor.
Utility model content
The purpose of the utility model is to provide a kind of high pressure automatic control devices of integrated preferential velocity's control.This reality
When lower with the novel pilot pressure provided with guide oil, engineering machinery host executive component can be still switched fast
The advantages of speed and torque, and it is at low cost, be not easy to make motor high pressure to automatically control performance to decline so that engineering machinery uses
Effect is good.
The technical solution of the utility model includes: a kind of high pressure automatic control device of integrated preferential velocity's control, including valve body,
Guide's pilot operated valve device and constant pressure valve are equipped in valve body；
Guide's pilot operated valve device includes guide's hydraulic control valve chamber through valve body, and guide's hydraulic control valve chamber includes the be sequentially connected in series
The outboard end in one hole and the second hole, the first hole is equipped with plug；Guide's pilot operated valve device is intracavitary to be equipped with guide's hydraulic control spool, guide's hydraulic control
The outer peripheral surface of spool be equipped be located at the first hole in bulge loop, between bulge loop and plug be equipped with guide's valve spring, from the first hole to
The first slot and the second slot are successively arranged on guide's hydraulic control spool outer peripheral surface on second hole direction；
The constant pressure valve includes constant pressure valve valve opening, is equipped with constant pressure valve valve pocket, the bottom surface of constant pressure valve valve opening in constant pressure valve valve opening
It is equipped with cavity between constant pressure valve valve pocket, through-hole is equipped in constant pressure valve valve pocket, is equipped with constant pressure valve core, constant pressure valve core in through-hole
Outer peripheral surface be equipped with third slot；Gap, constant pressure valve are equipped between end of the constant pressure valve core far from cavity and constant pressure valve valve opening
Third flow channel is equipped in spool, one end of third flow channel is connect with cavity, the other end and gap connect；Constant pressure valve valve pocket is equipped with
4th runner, one end of the 4th runner is connect across valve body with the first slot, the other end and gap connect；
First runner, second flow channel and the 6th channel, one end of the first runner and the second slot are equipped in the valve body
Connection, the other end are equipped with the first hydraulic fluid port, and first runner is equipped with the small end hydraulic fluid port connecting with variable piston small end；The second
The one end in road is connect with the first slot, the other end is equipped with C mouthfuls of big end connect with variable piston big end；The one end in the 6th channel
The second slot, other end connection third slot are connected after constant pressure valve valve pocket, the 6th channel is connected to first runner.
In the high pressure automatic control device of integrated preferential velocity's control above-mentioned, first hole is by Five-channel and becomes
Measure piston big end drain path T connection.
In the high pressure automatic control device of integrated preferential velocity's control above-mentioned, first slot, the second slot and third slot
It is all annular groove.
In the high pressure automatic control device of integrated preferential velocity's control above-mentioned, the constant pressure valve core is step spool,
Third slot is less than basal diameter of the third slot far from cavity close to the basal diameter of cavity.
Compared with prior art, realize that preferential velocity's control and high pressure are controlled automatically by setting guide's pilot operated valve device and constant pressure valve
System.Compared to the control mode of existing control valve, requirement of the utility model to guide's oil liquid pressure is substantially reduced, and only needs to provide
Pilot pressure greater than 2MPa can realize preferential velocity's control, reach engineering host executive component and be switched fast speed and torsion
The purpose of square, in addition, the utility model pair is so the control accuracy requirement of guide's oil liquid pressure is low, so that at low cost.This is practical
Guide's hydraulic control spool tail portion of Novel pilot oil effect is not dead space, and the oil liquid in the first hole can be discharged in time, will not reduce
The high pressure of motor itself automatically controls performance, is conducive to the use of engineering machinery.Due to pilot valve and the mutually indepedent work of constant pressure valve
Make, two valves are not interfere with each other, and realize the purpose of the speed-priority control of motor.
Therefore, when the pilot pressure that there is the utility model guide oil to provide is lower, engineering machinery host executes member
Part still the advantages of being switched fast speed and torque, and it is at low cost, be not easy to automatically control motor high pressure under performance
Drop is so that engineering machinery using effect is good.
Detailed description of the invention
Fig. 1 is the elevational cross-sectional view of the utility model.
Fig. 2 is the left view cross-sectional view of the utility model.
Fig. 3 is the structural schematic diagram of constant pressure valve.
Fig. 4 is the structural schematic diagram of guide's pilot operated valve device.
Fig. 5 is that the utility model connects the schematic diagram controlled after motor motor.
The label in accompanying drawing is: 1- valve body, 7- motor, 8- guide's pilot operated valve device, 9- constant pressure valve,
The first hole 801-, the second hole 802-, 804- plug, 805- guide's hydraulic control spool, 806- bulge loop, 807- pilot valve bullet
Spring, the first slot of 808-, the second slot of 809-, 810- Five-channel；
901- constant pressure valve valve opening, 902- constant pressure valve valve pocket, 903- cavity, 904- through-hole, 905- constant pressure valve core, 906-
Three slots, the gap 907-, 908- third flow channel, the 4th runner of 909-；
101- first runner, 102- second flow channel, the 6th channel 103-, the first hydraulic fluid port of 104-, 105- small end hydraulic fluid port, 106-
C mouthfuls of big end,
The first check valve of 701-, 702- second one-way valve, 703- variable piston big end, 704- variable piston small end, 705-
Variable piston rod, 706- feedback spring, 707- constant pressure valve spring, 708- drain tap, 709- guide's hydraulic fluid port, B- motor oil inlet,
X- guide's hydraulic fluid port, A- motor oil outlet, T- variable piston big end drain path.
Specific embodiment
The utility model is further described with reference to the accompanying drawings and examples, but is not intended as to the utility model
The foundation of limitation.
Embodiment.A kind of high pressure automatic control device of integrated preferential velocity's control, as shown in Figures 1 to 4, including valve body
1, valve body is interior to be equipped with guide's pilot operated valve device 8 and constant pressure valve 9；
Guide's pilot operated valve device 8 includes guide's hydraulic control valve chamber through valve body, and guide's hydraulic control valve chamber includes being sequentially connected in series
The outboard end in the first hole 801 and the second hole 802, the first hole 801 is equipped with plug 804；Guide's pilot operated valve device is intracavitary to be equipped with first drain
Spool 805 is controlled, the outer peripheral surface of guide's hydraulic control spool 805 is equipped with the bulge loop 806 being located in the first hole 801, bulge loop 806 and plug
Guide's valve spring 807,805 outer peripheral surface of guide's hydraulic control spool from 802 direction of the 801 to the second hole of the first hole are equipped between 804
On be successively arranged the first slot 808 and the second slot 809；
The constant pressure valve 9 includes constant pressure valve valve opening 901, is equipped with constant pressure valve valve pocket 902, constant pressure valve in constant pressure valve valve opening 901
It is equipped with cavity 903 between the bottom surface and constant pressure valve valve pocket 902 of valve opening 901, is equipped with through-hole 904, through-hole in constant pressure valve valve pocket 902
Constant pressure valve core 905 is equipped in 904, the outer peripheral surface of constant pressure valve core 905 is equipped with third slot 906；Constant pressure valve core 905 is separate
It is equipped with gap 907 between the end and constant pressure valve valve opening 901 of cavity 903, third flow channel 908 is equipped in constant pressure valve core 905, the
One end of three runners 908 is connect with cavity 903, the other end and gap 615 connect；Constant pressure valve valve pocket 902 is equipped with the 4th runner
909, one end of the 4th runner 909 is connect across valve body 1 with the first slot 808, the other end and gap 615 connect；
It is equipped with first runner 101, second flow channel 102 and the 6th channel 103 (i.e. P channel) in the valve body, described first
One end of runner 101 is connect with the second slot 809, the other end is equipped with the first hydraulic fluid port 104, and first runner 101 is equipped with living with variable
Fill in the small end hydraulic fluid port 105 that small end 604 connects；One end of the second flow channel 102 connect with the first slot 808, the other end be equipped with
The big end C mouth 106 that variable piston big end 703 connects；The one end in the 6th channel 103 connects after passing through constant pressure valve valve pocket 902
Second slot 809, the other end connect third slot 906, and the 6th channel 103 is connected to first runner 101；
Second hole 802 is equipped with screw thread.
First hole 801 is connect by Five-channel 810 with variable piston big end drain path T.
First slot 808, the second slot 809 and third slot 906 are all annular grooves.
The constant pressure valve core 905 is step spool, and third slot 906 is less than third slot close to the basal diameter of cavity 903
906 basal diameters far from cavity 903.
The application of the utility model: as shown in figure 5, motor 7 has a motor oil outlet A and a motor oil inlet B, root
According to the conversion of motor dextrorotation derotation, the disengaging oil function of motor oil outlet A and motor oil inlet B can change.Motor is fuel-displaced
Mouth A and motor oil inlet B is connect through the first check valve 701 and second one-way valve 702 with the first hydraulic fluid port 104 respectively, the change of motor 7
Amount piston big end 703 is connect with big end C mouth 106, and the variable piston small end 704 of motor 7 is connect with small end hydraulic fluid port 105, motor 7
By feedback spring 706 and constant pressure valve spring 707, (feedback spring 706 and constant pressure valve spring 707 are horses to variable piston rod 705
Up to the own part on 7) it is connect with constant pressure valve core 905, the drain tap 708 of motor 7 is connected to constant pressure valve valve opening 901, and second
Hole 802 is connect, constant pressure valve valve opening 901 and variable with guide's hydraulic fluid port X (guide oil is flowed out from guide's hydraulic fluid port X) of engineering machinery host
Piston big end drain path T connection.
Working principle: as shown in figure 5, motor is in the initial state, in the work of feedback spring 706 and constant pressure valve spring 707
Under, constant pressure valve 9 is in right position working condition, due to motor outlet oil normal open variable piston small end 704, so when original state
Motor in small displacement work status, exports lesser operation torque always.When motor inlet pressure gradually rises, act on
The oil liquid pressure of constant pressure valve core 905 overcomes the elastic force of feedback spring 706 and constant pressure valve spring 707, and constant pressure valve core 905 is to anti-
It is mobile to present 706 side of spring, 905 left position of constant pressure valve core is started to work, and motor outlet oil passes through constant pressure valve 9 at this time, using
Entering variable piston big end 703, is moved to the left variable piston after guide's pilot operated valve device 8, make motor to huge discharge change, motor into
Hydraulic fluid port pressure is higher, and discharge capacity is bigger, and the torque of motor output is also bigger.Specific Variable Control process is divided to two kinds, Yi Zhongxian
The process that Oil Guide is not intervened, another kind are the processes of guide oil intervention.
Guide oil does not intervene the process of variations per hour control:
For motor in entire multivariable process, control oil liquid both is from motor oil inlet, the first check valve 701 or the at this time
Two check valves 702 enable motor oil inlet high pressure oil smoothly to reach the 6th channel 103 of control valve, and control oil liquid is terminated in second
In slot 809 and third slot 906.In entire multivariable process, motor oil inlet oil liquid is living with variable always by first runner 101
Small end 704 is filled in link up.
When control oil liquid acts on total bullet that 905 thrust of constant pressure valve core is less than constant pressure valve spring 707 and feedback spring 706
When power, constant pressure valve 9 is in right position working condition (i.e. the 4th runner 909 is connected to gap 907), at this point, motor oil inlet oil liquid
Variable piston big end 703 (third slot 906 is not connected to the 4th runner 909 at this time) can not be reached, motor is in most float at this time
Amount.
When the pressure of motor oil inlet oil liquid gradually increases, constant pressure valve core 905 is acted on close to 903 side of cavity
Pressure is gradually increasing, when the thrust that the pressure generates is greater than total elastic force of constant pressure valve spring 707 and feedback spring 706, constant pressure
Valve core 905 is mobile, and the 4th runner 909 is disconnected with being connected to for gap 907, enters motor shell from variable piston big end 703
Oil return be cut off, while the 4th runner 909 is connected to third slot 906, the oil of motor oil inlet entering variable piston big end 703
Liquid is linked up, and the pressure of variable piston big end is gradually increasing, since there are difference in areas for variable piston big end 703 and small end 704, and
And the oil liquid pressure for entering both ends is equal, so variable piston moves under the action of pressure oil in variable piston big end 703, phase
It answers, the discharge capacity of motor also increases with it, and motor output torque also increases with it.The change in displacement of variable piston results in motor
The variation of discharge capacity.In the process, the elastic force of feedback spring 706 increases, constant pressure valve with the increase of the displacement of variable piston
Spool 905 is under the elastic force effect of feedback spring 706, and the 4th runner 909 being connected to and disconnecting with third slot 906, motor oil inlet
The oil liquid of mouth entering variable piston big end 703 is cut off, and is connected to again between the 4th runner 909 and gap 907, variable piston
The oil circuit that big end 703 enters motor shell oil return is switched on, and variable piston is under the pressure oil effect in variable piston small end 704
Mobile, therefore motor displacement also reduces, until it is living to act on variable when the power for acting on 905 two sides of constant pressure valve core is equal
The pressure at plug both ends reaches balance, and motor is also secured to a certain specific discharge capacity.Motor inlet oil liquid does not act on sky always
On chamber 903, constant pressure valve core 905 is step spool, and there are difference in areas for 906 both ends bottom surface of third slot, and third slot 906 is close to cavity
903 base area is less than base area of the third slot 906 far from cavity 903, when import oil liquid pressure is more than constant pressure valve spring
When with feedback spring resultant force, constant pressure valve core 905 can move and compress constant pressure valve spring and feedback spring, make the 4th runner 909
It is connected to third slot 906.
When motor inlet pressure is very high, the work of 9 left position of constant pressure valve (third slot 906 is connected to the 4th runner 909 at this time), horse
When up in huge discharge, if constant pressure valve core 95 is mobile, 906 He of third slot at this point, motor oil inlet oil liquid pressure is gradually reduced
The connection of 4th runner 909 disconnects, and is cut off from the oil liquid of motor oil inlet entering variable piston big end 703,909 He of the 4th runner
Gap 907 is connected to, and the oil liquid of variable piston big end 703 enters motor shell oil return, in 704 oil liquid pressure of variable piston small end
It acts on lower variable piston to move right, correspondingly, the discharge capacity of motor is gradually reduced, output torque is also gradually reduced.Motor into
The size of mouth pressure, determines the displacement size of motor, due to presence (the only decision of constant pressure valve spring 707 of feedback spring 706
Constant-pressure variable starting point, does not work, it is not contacted with variable piston, constant pressure during subsequent motor rate variable
Valve spring 707 can be regarded as a return spring in entire multivariable process.And feedback spring 706 is entire Variable Control mistake
The core of journey, side are connect with constant pressure valve, and the other side is connect with variable piston, and force variation caused by piston displacement changes is all logical
Feedback spring is crossed to act on constant pressure valve core.), the consecutive variations of motor inlet pressure realize motor displacement, revolving speed, torsion
The stepless variation of square.
The corresponding inlet pressure constant interval from small displacement to huge discharge is determined by 706 rigidity of feedback spring, rigidity
Bigger, section is longer, conversely, then shorter.Change the starting point of range of variables, the preload of change constant pressure valve spring 707 can be passed through
Power realizes that pretightning force is bigger, and variable starting point is higher, and pretightning force is smaller, and variable starting point is lower.
The process of guide oil intervention variations per hour control: when motor is in any discharge capacity between big small displacement, horse is needed
Up to when quickly exporting large torque, guide oil is intervened.
When motor is in 9 multivariable process of constant pressure valve, the work of the right position of guide's pilot operated valve device 8 (the first slot 808 and second at this time
Road 102 is connected to), at this point, guide's pilot operated valve device 8 does not influence the multivariable process of motor constant pressure valve 9.When motor is in intermediate discharge capacity,
It connects 2MPa guide oil and enters the second hole 802, at this point, acting on guide's hydraulic control spool 805 far from the outer of 807 side of guide's valve spring
Oil-control hydraulic coupling is greater than the elastic force of guide's valve spring 807, and guide's hydraulic control spool 805 is mobile to guide's valve spring 807, the first slot
It is blocked between 808 and second flow channel 102, motor inlet oil liquid passes through third slot 906,909 entering variable piston of the 4th runner
The oil liquid of big end 703 is cut off, and second flow channel 102 is connected to the second slot 809, motor inlet oil liquid successively through first runner 101,
102 entering variable piston big end 703 of second slot 809 and second flow channel, variable piston is mobile, and motor displacement directly reaches maximum,
Realize being switched fast for motor speed and torque.Conversely, when disconnecting guide oil, it is big by 8 entering variable piston of guide's pilot operated valve device
The oil liquid at end 703 is cut off, and is switched on by the oil liquid of 9 entering variable piston big end 703 of constant pressure valve, and motor reenters perseverance
9 multivariable process of pressure valve.When being worked due to guide's pilot operated valve device 8, cut by the oil liquid of 9 entering variable piston big end 703 of constant pressure valve
It is disconnected, so, no matter in the case of which kind of, as long as guide oil is connected in the second hole 802, constant pressure valve 9 will fail, therefore reach motor
Speed-priority control.Control that high pressure compared to original control valve automatically controls and hydraulic control is gone beyond one's commission, the utility model is to first pilot
The required precision of power is substantially reduced, and the pilot pressure that need to only provide greater than 2MPa can realize preferential velocity's control, reaches work
Journey machinery host executive component is switched fast the purpose of speed and torque.
Therefore, when the pilot pressure that there is the utility model guide oil to provide is lower, engineering machinery host executes member
Part still the advantages of being switched fast speed and torque, and it is at low cost, be not easy to automatically control motor high pressure under performance
Drop is so that engineering machinery using effect is good.
Claims (4)
1. a kind of high pressure automatic control device of integrated preferential velocity's control, it is characterised in that: including valve body (1), valve body (1) is interior
Equipped with guide's pilot operated valve device (8) and constant pressure valve (9)；
Guide's pilot operated valve device (8) includes guide's hydraulic control valve chamber through valve body, and guide's hydraulic control valve chamber includes the be sequentially connected in series
The outboard end of one hole (801) and the second hole (802), the first hole (801) is equipped with plug (804)；Guide's pilot operated valve device is intracavitary to be equipped with
Guide's hydraulic control spool (805), the outer peripheral surface of guide's hydraulic control spool (805) are equipped with the bulge loop being located in the first hole (801)
(806), guide's valve spring (807) are equipped between bulge loop (806) and plug (804), from the first hole (801) to the second hole (802)
The first slot (808) and the second slot (809) are successively arranged on guide's hydraulic control spool (805) outer peripheral surface on direction；
The constant pressure valve (9) includes constant pressure valve valve opening (901), is equipped with constant pressure valve valve pocket (902) in constant pressure valve valve opening (901), permanent
Cavity (903) are equipped between the bottom surface and constant pressure valve valve pocket (902) of pressure valve valve opening (901), are equipped in constant pressure valve valve pocket (902) logical
Hole (904), through-hole (904) is interior to be equipped with constant pressure valve core (905), and the outer peripheral surface of constant pressure valve core (905) is equipped with third slot
(906)；Gap (907) are equipped between the end and constant pressure valve valve opening (901) of constant pressure valve core (905) separate cavity (903), it is permanent
Third flow channel (908) are equipped in pressure valve spool (905), one end of third flow channel (908) connect with cavity (903), the other end and
Gap (907) connection；Constant pressure valve valve pocket (902) is equipped with the 4th runner (909), and one end of the 4th runner (909) passes through valve body
(1) it is connect with the first slot (808), the other end and gap (907) connect；
First runner (101), second flow channel (102) and the 6th channel (103), the first runner are equipped in the valve body (1)
(101) one end is connect with the second slot (809), the other end is equipped with the first hydraulic fluid port (104), and first runner (101) is equipped with and change
Measure the small end hydraulic fluid port (105) of piston small end (604) connection；One end of the second flow channel (102) connect with the first slot (808),
The other end is equipped with C mouthfuls of big end (106) connect with variable piston big end (703)；One end of 6th channel (103) passes through
Constant pressure valve valve pocket (902) connect afterwards the second slot (809), the other end connection third slot (906), the 6th channel (103) with it is first-class
Road (101) connection.
2. the high pressure automatic control device of integrated preferential velocity control according to claim 1, it is characterised in that: described the
One hole (801) is connect by Five-channel (810) with variable piston big end drain path T.
3. the high pressure automatic control device of integrated preferential velocity control according to claim 1, it is characterised in that: described the
One slot (808), the second slot (809) and third slot (906) are all annular grooves.
4. the high pressure automatic control device of integrated preferential velocity's control according to claim 1, it is characterised in that: the perseverance
Pressure valve spool (905) is step spool, and it is separate that basal diameter of the third slot (906) close to cavity (903) is less than third slot (906)
The basal diameter of cavity (903).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820835177.7U CN208221227U (en) | 2018-05-31 | 2018-05-31 | A kind of high pressure automatic control device of integrated preferential velocity's control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820835177.7U CN208221227U (en) | 2018-05-31 | 2018-05-31 | A kind of high pressure automatic control device of integrated preferential velocity's control |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208221227U true CN208221227U (en) | 2018-12-11 |
Family
ID=64507590
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820835177.7U Withdrawn - After Issue CN208221227U (en) | 2018-05-31 | 2018-05-31 | A kind of high pressure automatic control device of integrated preferential velocity's control |
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| Country | Link |
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| CN (1) | CN208221227U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108644169A (en) * | 2018-05-31 | 2018-10-12 | 中航力源液压股份有限公司 | The high pressure automatic control device of integrated preferential velocity's control |
-
2018
- 2018-05-31 CN CN201820835177.7U patent/CN208221227U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108644169A (en) * | 2018-05-31 | 2018-10-12 | 中航力源液压股份有限公司 | The high pressure automatic control device of integrated preferential velocity's control |
| CN108644169B (en) * | 2018-05-31 | 2023-10-17 | 中航力源液压股份有限公司 | High-voltage automatic control device integrating priority speed control |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Suzhou Liyuan Hydraulic Co.,Ltd. Assignor: AVIC LIYUAN HYDRAULIC Co.,Ltd. Contract record no.: X2023520000025 Denomination of utility model: A High Voltage Automatic Control Device with Integrated Priority Speed Control Granted publication date: 20181211 License type: Exclusive License Record date: 20230626 |
|
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20181211 Effective date of abandoning: 20231017 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20181211 Effective date of abandoning: 20231017 |