CN109268488A - A kind of converter coupling control valve - Google Patents
A kind of converter coupling control valve Download PDFInfo
- Publication number
- CN109268488A CN109268488A CN201811308132.5A CN201811308132A CN109268488A CN 109268488 A CN109268488 A CN 109268488A CN 201811308132 A CN201811308132 A CN 201811308132A CN 109268488 A CN109268488 A CN 109268488A
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- Prior art keywords
- pressure
- spool
- locking
- operating condition
- converter coupling
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- 230000008878 coupling Effects 0.000 title claims abstract description 40
- 238000010168 coupling process Methods 0.000 title claims abstract description 40
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 40
- 230000006698 induction Effects 0.000 claims description 14
- 230000005540 biological transmission Effects 0.000 abstract description 17
- 238000005452 bending Methods 0.000 abstract description 5
- 239000003921 oil Substances 0.000 description 42
- 239000002131 composite material Substances 0.000 description 6
- 239000000446 fuel Substances 0.000 description 6
- 230000008859 change Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 230000009471 action Effects 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000009699 differential effect Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/0003—Arrangement or mounting of elements of the control apparatus, e.g. valve assemblies or snapfittings of valves; Arrangements of the control unit on or in the transmission gearbox
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/0003—Arrangement or mounting of elements of the control apparatus, e.g. valve assemblies or snapfittings of valves; Arrangements of the control unit on or in the transmission gearbox
- F16H61/0009—Hydraulic control units for transmission control, e.g. assembly of valve plates or valve units
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Transmission Device (AREA)
- Control Of Fluid Gearings (AREA)
Abstract
The invention discloses a kind of converter coupling control valve, the present invention can also be at hydraulic moment changeable operating condition and locking operating condition work according to the secondary speed chores of setting in hydraulic moment changeable operating condition and locking operating condition with human intervention.Hydraulic moment changeable operating condition is in during Hydrodynamic transmission starting or secondary speed are less than setting value, gear shift, simultaneously as more low reason is arranged in locking revolving speed, when causing converter coupling that cannot unlock, bending moment operating condition can be at according to actual use situation, human intervention pressure.Converter coupling works in bending moment operating condition, and driving equipment can be acted on using the torque increase of torque-converters, improves output torque, has preferable dynamic property;When equipment stable operation, turbine reaches setting speed or human intervention is forced in when being latched operating condition, and converter coupling work can have preferable economy in locking operating condition with efficient operation.
Description
Technical field
The invention belongs to technical field of hydraulic more particularly to a kind of converter coupling hydraulic moment changeables, locking
The control valve arrangement of operating conditions.
Background technique
The BY series Hydrodynamic transmission of my company's exploitation, consists of two parts, and input terminal is the different composite type liquid that can hold
Power torque-converters, output end are multi gear position planetary transmission, are driven by prime mover (diesel engine or motor).Composite type fluid power
Torque-converters includes lockup clutch and torque-converters two parts, and wherein torque-converters is made of pump impeller, turbine, guide wheel, pump impeller directly with
Prime mover connection, and directly driven by prime mover.Converter coupling has hydraulic moment changeable operating condition and locking operating condition.Fluid power becomes
Square operating condition transmits power by the transmission oil that inside is full of, and has torque amplification, but transmission efficiency is relatively low, is latched operating condition by closing
Lock clutch directly transmits power after combining, transmission efficiency is high.
A kind of converter coupling control valve of Chinese invention patent (notification number CN104141765B, day for announcing 2016-
Being used cooperatively by locking spool, flow spool and pitot pressure sensing device 09-21) is disclosed, keeps control valve effective
Converter coupling operating condition is controlled, and its is compact-sized, reliable operation.
But the technical solution of above-mentioned patent has the following problems:
(1) patent is not suitable for slow-speed of revolution prime mover (such as diesel engine, motor), since torque-converters absorbs power characteristic
Reason, during actual use the case where cannot being latched after cannot unlocking or unlock after being latched occur.
(2) simplified breakdown judge inspection socket is not set in the patent formula, increases and judges complete machine hydraulic control system failure
Difficulty and the repair time.
(3) skin support induction pressure control mode is used only in the patent formula, can only be incuded by skin support sensing device
Pressure come control its unlock or locking.
Summary of the invention
The technical problem to be solved by the present invention is providing a kind of converter coupling control valve, cooperate composite type liquid
The operating conditions of power bending moment according to the usage requirement control effectively to Hydrodynamic transmission operating condition.
Technical solution of the present invention is accomplished by
A kind of converter coupling control valve, including main oil pressure pipeline control oil pipeline, flow spool, locking
Spool and center-leakage type three position four-way electromagnetic valve;
The main oil pressure pipeline is connected with the left end of locking spool oil inlet, flow spool;
Main oil pressure pipeline right end with gear clutch control valve and flow spool respectively after first throttle valve
It is connected, and is provided with one-way throttle valve between the right end and first throttle valve of flow spool;
The main oil pressure pipeline is connected through third throttle valve with center-leakage type three position four-way electromagnetic valve;
Pitot pressure sensing device is provided on the control oil pipeline, and through second throttle and center-leakage type three four
The pressure oil of three-way electromagnetic valve control enters the right end of locking-valve core after converging.
Preferably, diameter is less than diameter at right end P at the left end O of the flow spool.
Preferably, diameter is greater than diameter at right end N at the locking spool left end M.
Preferably, the center-leakage type three position four-way electromagnetic valve has two solenoid valves of A, B.
Preferably, pitot pressure pressure tap, institute are provided on the control oil pipeline and in one end of second throttle
State and be provided with lockup clutch oil pressure pressure tap between flow spool and lockup clutch, the flow spool and locking spool it
Between be provided with locking spool operating pressure pressure tap.
Further, the principal pressure P1 of the main oil pressure pipeline controls oil pipeline in maximum speed greater than torque-converters work
The pressure P2 of middle pitot pressure sensing device induction.
Converter coupling of the invention can according to the secondary speed chores of setting in hydraulic moment changeable operating condition and
It is latched operating condition, hydraulic moment changeable operating condition and locking operating condition work can also be at human intervention.When Hydrodynamic transmission starting or
Secondary speed is in hydraulic moment changeable operating condition during being less than setting value, gear shift, simultaneously as more low reason is arranged in locking revolving speed,
When causing converter coupling that cannot unlock, bending moment can be at according to actual use situation, human intervention pressure
Operating condition.Converter coupling works in bending moment operating condition, and driving equipment can be acted on using the torque increase of torque-converters, improves output
Torque has preferable dynamic property;When equipment stable operation, turbine reaches setting speed or human intervention is forced in locking work
When condition, converter coupling work can have preferable economy in locking operating condition with efficient operation.
Scheme compared with prior art, the present invention have the advantage that
(1) a kind of hydraulic control system of converter coupling operating condition control is provided.Composite type fluid power becomes
Square device is made of torque-converters and lockup clutch, when lockup clutch oil-filled (locking), in locking operating condition work, works as locking
When clutch draining (unlock), work in hydraulic moment changeable operating condition.Present invention seek to address that the operating condition of converter coupling
Control, efficiently controls the locking or unlock of lockup clutch.
(2) locking of converter coupling, unlock revolving speed can be adjusted adjustment by increasing, subtracting adjustment gasket,
It can also be adjusted by adjusting locking spool return spring pressure, meet different operating conditions and use needs.
(3) a kind of control of Hydrodynamic transmission gear shift unlocking function is provided, when Hydrodynamic transmission gear shift, according to spool
Differential principle, moment exhausts lockup clutch pressure oil, so that converter coupling is in hydraulic moment changeable operating condition, work as gear shift
Process terminates, and after output revolving speed is raised to certain value, equally by the differential principle of spool, it is made to restore to be latched operating condition work again.
In this way, can reduce Hydrodynamic transmission shifting shock.
(4) gear shift unlocked time is adjusted in a certain range according to the usage requirement.Gear shift unlocked time is to pass through
It is realized to the throttling fuel feeding of a sizing chamber, change throttle orifice size, so that it may change gear shift unlocked time.
(5) it provides converter coupling locking revolving speed and is greater than unlock revolving speed control, the differences of two revolving speeds can be by
Requirement design, when converter coupling being avoided to work near locking revolving speed point, since skin support incudes pressure fluctuation,
Cause converter coupling frequently in locking operating condition and unlock change working.
(6) converter coupling can be by powering to corresponding solenoid valve, and human intervention realizes locking and unlock function
Energy.For disclosed converter coupling control valve without this function, it can only pass through the induction of skin support sensing device
Pressure is unlocked or is latched to control it.The pressure of skin support sensing device induction is associated with torque converter turbine revolving speed, and use is specific
Transmission oil, it is directly proportional to secondary speed square under certain temperature.When secondary speed is lower, induction pressure error and fluctuation compared with
Greatly, and different transmission oils, difference use under temperature conditions, and induction pressure also changes, and will cause locking rotation speed change, is unfavorable for
It is latched the accurate control of revolving speed.The present invention in comprising existing patent in addition to the function of converter coupling control valve patent,
It can also be met some specific using item according to actual use situation, the locking of human intervention converter coupling or unlock
Requirement under part.
(7) the secondary speed signal that speed probe induction can be analyzed by processor, realizes composite type hydraulic moment changeable
Device is latched operating condition and unlocks the accurate control of operating condition.It is more suitable for Hydrodynamic transmission to upshift and downshift automatically control.
(8) existing patented technology is not suitable for slow-speed of revolution prime mover (such as diesel engine, motor), since torque-converters absorbs function
Rate characteristic, during actual use the case where cannot being latched after cannot unlocking or unlock after being latched occur, the present invention is effective
Solves the problems, such as this.
(9) compared to there was only skin support induction pressure control mode in existing patented technology, the present invention is to composite type hydraulic moment changeable
Lockup clutch in device realizes dual (parallel connection) control, lockup clutch functional reliability is increased, when two kinds of controlling parties
When the locking revolving speed and unlock revolving speed of formula adjustment are not much different, if one of control path breaks down, another path is also
It can control lockup clutch normal work.
(10) simplified breakdown judge inspection socket is not set compared to existing patent, the present invention can be by stablizing after detection gear shift
It is latched the pressure condition of corresponding pressure tap when operating condition, judges gear clutch and gear clutch control system with the presence or absence of serious
Oil leakage fault simplifies the difficulty for judging complete machine hydraulic control system failure, shortens the repair time.
Detailed description of the invention
Fig. 1 is converter coupling control valve initial position hydraulic diagram;
Fig. 2 is that converter coupling controls hydraulic diagram (pitot pressure control) after valve blocking;
Fig. 3 is that converter coupling controls gear shift unlocking hydraulic pressure schematic diagram after valve blocking (pitot pressure controls, is automatically controlled);
Fig. 4 is hydraulic diagram (automatically controlled locking) after the forced blocking of converter coupling control valve;
Fig. 5 is converter coupling control valve compulsive unlocking hydraulic diagram (electric control for opening lock);
Fig. 6 is the outline drawing of converter coupling control valve;
Fig. 7 is the left view of Fig. 6.
Specific embodiment
The invention will be further described with specific embodiment with reference to the accompanying drawing:
For the present invention as shown in Figure 1, principal pressure P1 is the main oil pressure that Hydrodynamic transmission control system provides, pressure P2 is skin support
The control oil pressure skin support oil pressure that pressure sensitive device provides, pressure size are corresponding with certain turbine output revolving speed.Including
One backing pin 1 and the second backing pin 11, the first valve plug 2 and the second valve plug 9, the first O-ring seal 3 and with the second O-ring seals 10, valve
Body 4, flow spool 5, locking spool 6, locking spool return spring 7, adjustment gasket 8, plug screw 12, one-way throttle valve 13, first
Throttle valve 16, second throttle 18 and third throttle valve 20, lockup clutch oil pressure pressure tap 15, pitot pressure pressure tap 17,
It is latched spool operating pressure pressure tap 21, center-leakage type three position four-way electromagnetic valve 19 and fuel tank 22.
Preferably, diameter is less than diameter at " P " at flow spool 5 " O " in the present invention, and diameter is greater than at locking spool 6 " M "
Diameter at " N ", center-leakage type three position four-way electromagnetic valve 19 have two solenoid valves of A, B, control voltage using 24V or 12V.
Preferably, principal pressure P1 of the present invention is greater than the torque-converters work pressure that skin support sensing device incudes in maximum speed
P2。
Preferably, first throttle valve 16 provides suitable flow guarantee gear clutch control valve normal work in the present invention
It is greater than 20 throttling action of third throttle valve with the throttling action of second throttle 18.
The present invention is achieved like this: by the hydraulic principle of Fig. 1, the pressure oil (principal pressure provided by oil feed pump
P1) enter locking 6 oil inlet of spool, 5 one end of flow spool and throttle valve 20, gear clutch is on the one hand entered by throttle valve 16
Device control valve, and be diverted through one-way throttle valve 13 and enter back into 5 other end of flow spool, on the other hand entered by throttle valve 20
Center-leakage type three position four-way electromagnetic valve 19.The oil pressure (i.e. pressure P2) of pitot pressure sensing device induction is let out in by throttle valve 18
The pressure oil that formula three position four-way electromagnetic valve 19 controls enters 6 right part of locking-valve core after converging.
When center-leakage type three position four-way electromagnetic valve 19 is in middle position, if the oil pressure (pressure of pitot pressure sensing device induction
P2 when) thrust generated is less than the thrust of locking spool return spring 7, locking spool 6 moves right, and can cut off into flow valve
5 fuel feeding of core.If the thrust that the oil pressure (pressure P2) of pitot pressure sensing device induction generates is greater than locking spool return spring 7
Thrust when, locking spool 6 is moved to the left, and the pressure oil (principal pressure P1) that oil feed pump provides can enter flow spool 5, then by flowing
It measures spool 5 to control, to lockup clutch fuel feeding or draining.
When the B solenoid valve of center-leakage type three position four-way electromagnetic valve 19 is powered, principal pressure P1 is directly entered locking 6 right end of spool
Portion, since the throttling action of throttle valve 18 is greater than throttle valve 20, locking 6 right part of spool is principal pressure P1, can be pushed directly on
Locking spool 6 is moved to the left, and the pressure oil (principal pressure P1) that oil feed pump provides can enter flow spool 5, then be controlled by flow spool 5
System, to lockup clutch fuel feeding or draining.
When the A solenoid valve of center-leakage type three position four-way electromagnetic valve 19 is powered, principal pressure P1 is directly entered locking 6 left end of spool
It forces that locking spool 6 is pushed to move right, cutting enters flow spool with locking 7 elastic force collective effect of spool return spring in portion
5 principal pressure is oily (principal pressure P1), while lockup clutch draining unlocks.
It is latched diameter at " M " of spool 6 in this control valve and is less than diameter at " N ", is moved to the left, is latched when being latched spool 6
When clutch is in oil condition, a power will increase, the power generated with pitot pressure sensing device induction oil pressure (pressure P2)
Collective effect pushes locking spool return spring 7.It can be seen that pushing the power and its power returned of locking spool return spring 7
It is different.Since pitot pressure sensing device induction oil pressure (pressure P2) is corresponding with certain lockup clutch locking revolving speed,
It is different with unlock revolving speed so to will appear lockup clutch locking revolving speed, avoids Hydrodynamic transmission work near locking revolving speed
When, it is ceaselessly latched and unlocks since skin support sensing device incudes lockup clutch caused by pressure fluctuation.
One-way throttle valve 13 realizes the 5 quick draining of right end cavity of flow spool and throttles oil-filled in this control valve.Make to be latched
The quick draining of clutch, oil-filled at a slow speed, the purpose for realizing lockup clutch quick release, being latched at a slow speed.
Flow spool 5 controls the fuel feeding and draining of lockup clutch in this control valve, and diameter is less than straight at " P " at " O "
Diameter.Under normal circumstances, 5 left and right ends pressure of flow spool is almost the same, and due to the differential action of spool, flow spool 5 is in
Left position, after when left and right ends, pressure difference reaches certain value, 5 right end power of flow spool can be greater than the power of left end, will push stream
Amount spool 5 moves right.
The pressure that 16 controllable flow rate spool 5 or so of first throttle valve is held in this control valve, when gear clutch control valve
Gear shift, when clutch is instantaneously needed largely with oil, 16 both ends of throttle valve generate mutually enough pressure differences, and flow spool 5 is made to move right
It is dynamic, it opens by the closed oil circuit to gear clutch control valve fuel feeding of flow spool 5, guarantees to change in gear clutch control valve
Oil when shelves, while lockup clutch draining.At this point, no matter whether lockup clutch works, all in compulsive unlocking state.When
After clutch is oil-filled, the pressure difference that first throttle valve 16 generates becomes smaller, and flow spool 5 is moved to the left again, lockup clutch
It is restored to working condition before gear shift.
In this control valve, center-leakage type three position four-way electromagnetic valve 19 can force the position of control locking spool 6, to flow valve
The control function of core 5 does not influence.
This control valve compensates for the deficiencies in the prior art, can also when low speed prime mover (diesel engine, motor) is used as power
To realize locking and unlock;Sometimes because of need of work, lower locking revolving speed is set, when existing art solutions cannot unlock,
Unlock can be realized by powering to the B solenoid valve of center-leakage type three position four-way electromagnetic valve 19;Low speed or when overloaded is made up simultaneously, is become
Locking revolving speed is not achieved when cannot be latched in square device secondary speed, powers to the A solenoid valve of center-leakage type three position four-way electromagnetic valve 19, real
It is now latched, has widened converter coupling input speed use scope.
This control valve also compensates for the deficiency that existing patent cannot accurately control locking, unlock revolving speed, can pass through meter
Machine testing torque converter turbine revolving speed is calculated, realize locking revolving speed and unlocks the accurate control of revolving speed, and is latched revolving speed and unlock revolving speed
Difference is easy to adjust, quick, is more suitable for that Hydrodynamic transmission upshifts automatically, downshift control.
All control functions of this control valve, compact-sized by Integration Design, reliable operation.
Although example of the invention is described in detail with reference to the accompanying drawings above, it is not limited only to this specific embodiment party
Formula, the various equivalent, deformation process that those skilled in the art carries out according to specific technical solution, also in protection model of the invention
Within enclosing.
Claims (6)
1. a kind of converter coupling control valve, it is characterised in that: including main oil pressure pipeline, control oil pipeline, flow
Spool (5) is latched spool (6) and center-leakage type three position four-way electromagnetic valve (19);
The main oil pressure pipeline is connected with the left end of locking spool (6) oil inlet, flow spool (5);
Main oil pressure pipeline right side with gear clutch control valve and flow spool (5) respectively after first throttle valve (16)
End is connected, and one-way throttle valve (13) are provided between the right end of flow spool (5) and first throttle valve (16);
The main oil pressure pipeline is connected through third throttle valve (20) with center-leakage type three position four-way electromagnetic valve (19);The control oil pressure
It is provided with pitot pressure sensing device on pipeline, and is controlled through second throttle (18) and center-leakage type three position four-way electromagnetic valve (19)
Pressure oil converge after enter locking-valve core (6) right end.
2. a kind of converter coupling control valve according to claim 1, it is characterised in that: the flow spool
(5) diameter is less than diameter at right end P at left end O.
3. a kind of converter coupling control valve according to claim 1, it is characterised in that: the locking spool
(6) diameter is greater than diameter at right end N at the M of left end.
4. a kind of converter coupling control valve according to claim 1, it is characterised in that: the center-leakage type three
Four way solenoid valve (19) has two solenoid valves of A, B.
5. a kind of converter coupling control valve according to claim 1, it is characterised in that: the control oil pressure pipe
Road and be provided with pitot pressure pressure tap (17) in one end of second throttle (18), the flow spool (5) and be latched from
It is provided with lockup clutch oil pressure pressure tap (15) between clutch, is provided between the flow spool (5) and locking spool (6)
It is latched spool operating pressure pressure tap (21).
6. a kind of converter coupling control valve according to claim 1, it is characterised in that: the main oil pressure pipeline
Principal pressure P1 be greater than torque-converters work in maximum speed control oil pipeline in pitot pressure sensing device induction pressure
P2。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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CN201811308132.5A CN109268488B (en) | 2018-11-05 | 2018-11-05 | Comprehensive hydraulic torque converter control valve |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201811308132.5A CN109268488B (en) | 2018-11-05 | 2018-11-05 | Comprehensive hydraulic torque converter control valve |
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Publication Number | Publication Date |
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CN109268488A true CN109268488A (en) | 2019-01-25 |
CN109268488B CN109268488B (en) | 2020-09-29 |
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CN201811308132.5A Active CN109268488B (en) | 2018-11-05 | 2018-11-05 | Comprehensive hydraulic torque converter control valve |
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CN (1) | CN109268488B (en) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104141765A (en) * | 2014-05-14 | 2014-11-12 | 贵州凯星液力传动机械有限公司 | Control valve for comprehensive hydraulic torque converter |
CN206770318U (en) * | 2017-05-05 | 2017-12-19 | 长春迈达汽车设备有限公司 | Cylinder is segmented pressure position control device |
CN207004966U (en) * | 2017-07-20 | 2018-02-13 | 江苏创格流体控制有限公司 | A kind of SMD micro hydraulic locking-valve block |
-
2018
- 2018-11-05 CN CN201811308132.5A patent/CN109268488B/en active Active
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104141765A (en) * | 2014-05-14 | 2014-11-12 | 贵州凯星液力传动机械有限公司 | Control valve for comprehensive hydraulic torque converter |
CN206770318U (en) * | 2017-05-05 | 2017-12-19 | 长春迈达汽车设备有限公司 | Cylinder is segmented pressure position control device |
CN207004966U (en) * | 2017-07-20 | 2018-02-13 | 江苏创格流体控制有限公司 | A kind of SMD micro hydraulic locking-valve block |
Non-Patent Citations (1)
Title |
---|
郝春玲: "《液压与气压***拆装维护和调试》", 30 April 2014 * |
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Address after: 563000 Gaoping Electromechanical Industrial Park, Huichuan District, Zunyi City, Guizhou Province Patentee after: Guizhou Aerospace Kaixing Intelligent Transmission Co.,Ltd. Country or region after: China Address before: 563003 Guizhou Aerospace hi tech Industrial Park, Dalian Road, Huichuan District, Zunyi City, Guizhou Province (Zunyi Park) Patentee before: GUIZHOU WINSTAR HYDRAULIC TRANSMISSION MACHINERY Co.,Ltd. Country or region before: China |