CN203836065U - Vehicle magneto-rheological oil-gas suspension damper valve - Google Patents
Vehicle magneto-rheological oil-gas suspension damper valve Download PDFInfo
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- CN203836065U CN203836065U CN201420052440.7U CN201420052440U CN203836065U CN 203836065 U CN203836065 U CN 203836065U CN 201420052440 U CN201420052440 U CN 201420052440U CN 203836065 U CN203836065 U CN 203836065U
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- floating piston
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Abstract
The utility model provides a vehicle magneto-rheological oil-gas suspension damper valve comprising a valve body, a mounting pipe and a floating piston, wherein the valve body is internally provided with a cavity; the mounting pipe is fixedly installed inside the valve body; the mounting pipe is internally provided with an induction coil and a winding bar; the induction coil is wound around the winding bar; the mounting pipe is provided with the floating piston; the outer wall of the mounting pipe is provided with an upper fixing piece, a middle fixing piece and a lower fixing piece; the floating piston is arranged between the upper fixing piece and the middle fixing piece; an upper limiting assembly is arranged between the floating piston and the upper fixing piece; a lower limiting assembly is arranged between the floating piston and the middle fixing piece; the mounting pipe is provided with a fixing valve element. The damper valve and a speed sensor are integrated, and reliability is high. The vehicle magneto-rheological oil-gas suspension damper valve can automatically sense the vibration speed of wheels relative to a vehicle body, and can correspondingly adjust the damping according to the voltage generated by the induction coil.
Description
Technical field
The utility model relates to the damping member of auto magnetorheological hydro-pneumatic suspension system, particularly the magnetorheological hydro pneumatic suspension orifice valve of a kind of vehicle.
Background technique
Traditional hydro-pneumatic suspension system designs according to certain specific pavement behavior and travel condition of vehicle, its damping characteristic is nonadjustable, but because pavement conditions is complicated and changeable, the suspension system of fixing damping characteristic cannot be according to its damping of the corresponding adjustment of the state of pavement conditions and vehicle, in the time that pavement conditions and vehicle-state exceed its design condition, the effectiveness in vibration suppression of suspension will reduce greatly, affect smoothness and the Security of vehicle.
Magnetorheological hydro pneumatic suspension is to utilize the rheological properties of magnetic flow liquid can be by the characteristic of externally-applied magnetic field control, realize the control of damping constant, thereby realize the control of damping force, in the time of Vehicular vibration, the vehicle body that suspension system controller detects according to sensor and wheel relative movement situation are made corresponding computing, produce a control signal, by current driver to field coil load driver electric current, to regulate magnetic intensity, thereby change the yield stress size of magnetic flow liquid in magnetorheological hydro pneumatic suspension, reach the object of damping adjusting power, in this closed loop control system, vehicle body and wheel are the most important input objects of controller to movement velocity.
For current magnetorheological hydro pneumatic suspension, because the oil cylinder piston area of hydro pneumatic suspension is larger, therefore, fluid flow by orifice valve can be very large, in the time that orifice valve is built-in, while travelling on Huai road, will run into heat dissipation problem, the too high meeting of oil liquid temperature causes reduced viscosity, have influence on the performance of gas in accumulator, and likely damage electromagnetic coil, thereby have influence on the external characteristics of hydro pneumatic suspension, and in existing vehicle magneto-rheological vibration damping system, realize vehicle body and wheel movement velocity sensing mode is had to two kinds, relative displacement mode and relative acceleration mode, relative displacement mode need to configure one or more displacement transducer in vibration system, and relative acceleration mode need to configure one or more acceleration transducer in vibration system, no matter adopt which kind of mode, separately sensors configured all can increase the cost of system, and sensor be directly exposed in external environment condition easily damaged, thereby reduce the reliability of system.
The CN1593962A utility model patent that China announces has been announced a kind of vehicle suspension vibration damper with relative velocity self-sensing function for the first time in advance, this model utility is from vibration damper, utilize the characteristic of magnetorheological hydro pneumatic suspension, on piston head, be wound around a field coil, one inductor coil is installed in piston rod, in the time of Vehicular vibration, there is corresponding variation in the magnetic linkage of inductor coil, the relative velocity of voltage signal reflection vibration, controller does further adjusting according to the voltage signal of inductor coil to vibration damper, but, in the time that road excitation is very large, fluid flow by piston damping hole can be very large, because piston is built-in, it is very fast that its temperature can rise, the field coil being integrated on piston easily damages, in addition the lead-in wire of field coil and inductor coil will shorten along with piston movement extends, lead-in wire is easily pulled off, this also can reduce the reliability of vibration damper, the CN101871502B utility model patent that China announces has been announced a kind of external mechanical induction type adjustable damping valve of oil-gas suspension for the first time, this orifice valve is according to the device of the amplitude automatic damping adjusting of road excitation, but it is machinery control, after once structure and parameter designs, damping characteristic cannot change, moreover its damping only has two-stage, cannot well meet the demand of various road conditions and vehicle-state.
Model utility content
Technical problem to be solved in the utility model is to provide the magnetorheological hydro pneumatic suspension orifice valve of vehicle that a kind of reliability is high, the magnetorheological hydro pneumatic suspension orifice valve of this vehicle can be according to the damping of vehicle body and wheel Relative Vibration speed adjustable suspension, and damping force, for adjustable continuously, realizes half ACTIVE CONTROL of vibration system.
For solving the problems of the technologies described above, the utility model provides a kind of vehicle magnetorheological hydro pneumatic suspension orifice valve, in comprising, there are valve body, mounting pipe and the floating piston of cavity, in valve body, fixed placement has mounting pipe, in mounting pipe, be provided with inductor coil and wire winding rod, inductor coil is wrapped in outside wire winding rod, and inductor coil two ends lead-in wires stretches out outside mounting pipe, and floating piston is installed in mounting pipe;
Mounting pipe outer wall is disposed with upper fixing element, middle fixed block and lower fixed block from top to bottom, floating piston is arranged between upper fixing element and middle fixed block, between floating piston and upper fixing element, be placed with upper limit assembly, upper limit assembly at least comprises upper spring, between floating piston and middle fixed block, be placed with lower limit assembly, lower limit assembly at least comprises lower spring;
In mounting pipe, be also provided with fixed spool, and fixed spool is placed on position between middle fixed block and lower fixed block, between fixed spool and valve interior wall, has space;
The cavity in valve body is divided into epicoele, lumen and cavity of resorption by floating piston and fixed spool, has the accumulator interface communicating with the external world on epicoele sidewall, has the oil cylinder interface communicating with the external world on cavity of resorption sidewall;
Described fixed spool comprises platen, field coil, housing and insulating bush, and housing sidewall top has coil recess, and field coil is wrapped in coil recess, and outside coil recess, cover has insulating bush, and upper platen is fixed on housing upper-end surface;
Fairlead runs through fixed spool and mounting pipe, and the two ends lead-in wire of field coil stretches out outside mounting pipe by fairlead.
In order better to understand technology contents of the present utility model, below by magnetorheological this vehicle hydro pneumatic suspension orifice valve referred to as this orifice valve.
Adopt after such structure, in the time of the upper and lower motion of wheel, under the promotion of magnetic flow liquid, floating piston slides up and down along mounting pipe; The movement velocity of floating piston has reflected the movement velocity of wheel with respect to vehicle body, limits the relative position of floating piston by upper limit assembly and lower limit assembly, makes floating piston in the time that wheel stops beating, automatically get back to state of equilibrium;
When work, field coil produces magnetic field, between fixed spool and floating piston, form an Operating In Persistent Current Mode magnetic circuit, the magnetic field overwhelming majority magnetic flux that field coil produces is by this magnetic circuit, form the main flux of working sensor, inductor coil produces a same frequency alternating voltage signal, because the main flux of Operating In Persistent Current Mode magnetic circuit is constant, in the time of road excitation, between wheel and vehicle body, there is relative movement, floating piston moves up and down along mounting pipe, the coil turn of inductor coil in Operating In Persistent Current Mode magnetic circuit correspondingly changed, the induction of inductor coil two ends produces a voltage signal, the information that this voltage signal comprises vibration velocity size, the voltage signal of inductor coil is drawn by inductor coil, thereby realize vibration velocity sensing.
Fixed spool is placed between middle fixed block and lower fixed block, and the position of fixed spool is fixed, and avoids the lead-in wire of field coil to pull, and strengthens reliability;
This orifice valve is integrated with velocity transducer, has avoided sensor to be directly exposed in severe external environment, therefore reliability is high.This external magnetorheological hydro-pneumatic suspension system orifice valve can automatic sensing wheel with respect to the vibration velocity of vehicle body, and the voltage swing producing according to inductor coil carries out the corresponding adjusting of damping, thereby realizes half ACTIVE CONTROL of hydro pneumatic suspension.
This orifice valve have external diameter compared with little, damping force is large, required voltage is low and it is little to consume energy, and external assembling be convenient to heat radiation.
The housing of floating piston, wire winding rod and the fixed spool of this orifice valve all adopts high permeability material to make; The upper platen of fixed spool adopts non-magnet_conductible material to make; The upper and lower end face of described valve body adopts non-magnet_conductible material to make, and the sidewall of valve body adopts high permeability material to make.
Adopt after such structure, input signal is sent into field coil by field coil lead-in wire, and now field coil produces alternating magnetic field, is convenient to form Operating In Persistent Current Mode magnetic circuit in fixed spool, valve body, floating piston, mounting pipe, wire winding rod.
The lead-in wire of the field coil of this orifice valve and the lead-in wire of inductor coil scribble sealing compound, and the upper and lower two ends of inductor coil are respectively arranged with insulation rubber seal; Adopt after such structure, prevent that the lead-in wire of field coil and the lead-in wire of inductor coil and outer member are short-circuited.
The upper limit assembly of this orifice valve also comprises the upper spring cover that is enclosed within mounting pipe outside and the upper spring seat that is enclosed within mounting pipe outside, and upper spring is placed between upper spring cover and upper spring seat; Described lower limit assembly also comprises the lower spring cover that is enclosed within mounting pipe outside and the lower spring cup that is enclosed within mounting pipe outside, and lower spring is placed between lower spring cover and lower spring cup; While adopting this structure, the more reasonable structure of upper limit assembly and lower limit assembly.
The upper fixing element of this orifice valve is made up of the upper snap ring coordinating with mounting pipe and upper back-up ring; Described middle fixed block is the outer bulge loop of mounting pipe outer wall; Described lower fixed block is made up of the lower snap ring coordinating with mounting pipe and lower back-up ring; While adopting this structure, the more reasonable structure of upper fixing element, middle fixed block and lower fixed block.
Brief description of the drawings
Fig. 1 is this orifice valve embodiment's structural representation.
Fig. 2 is the A portion enlarged view of Fig. 1.
Fig. 3 is this orifice valve embodiment's use phase diagram.
Fig. 4 is this orifice valve embodiment's electrical installation schematic diagram.
Embodiment
As shown in Fig. 1 to 2
This orifice valve comprises valve body 1, mounting pipe 2, floating piston 5, upper limit assembly, lower limit assembly, upper fixing element, fixed spool 8 and lower fixed block.
Valve body 1 comprises upper cover plate 1a, sleeve 1b and lower cover plate 1c, between upper cover plate 1a and sleeve 1b, is provided with seal ring 1d, the same seal ring 1d that is provided with between lower cover plate 1c and sleeve 1b, and upper cover plate 1a and lower cover plate 1c adopt extremely low permeability magnetic material to make; Sleeve 1b adopts high permeability material to make.
Between upper cover plate 1a and lower cover plate 1c, be fixed with mounting pipe 2, in mounting pipe 2, be provided with inductor coil 2a and wire winding rod 2b, inductor coil 2a is wrapped in outside wire winding rod 2b, the upper and lower two ends of inductor coil 2a are respectively arranged with insulation rubber seal 2c, and inductor coil 2a two ends inductor coil lead-in wire 2d stretches out outside valve body 1 through upper cover plate 1a, the inductor coil lead-in wire 2d of inductor coil 2a scribbles sealing compound, and wire winding rod 2b adopts high permeability material to make; Mounting pipe 2 outer walls are distributed with jump ring groove, outer bulge loop 2e and lower circlip groove from top to bottom successively.
Upper fixing element is made up of upper snap ring 3a and upper back-up ring 3b, the upper jump ring groove fit of upper snap ring 3a and mounting pipe 2; Lower fixed block is made up of lower snap ring 4a and lower back-up ring 4b, the lower circlip groove fit of lower snap ring 4a and mounting pipe 2.
Floating piston 5 is installed in mounting pipe 2, and floating piston 5 is arranged between upper fixing element and outer bulge loop 2e, floating piston 5 can move along the axial direction of mounting pipe 2, and floating piston 5 adopts high permeability material to make.
Between floating piston 5 and upper fixing element, be placed with upper limit assembly, upper limit assembly comprises the upper spring cover 6a that is enclosed within mounting pipe 2 outsides and the upper spring seat 6b that is enclosed within mounting pipe 2 outsides, upper spring 6c is placed between upper spring cover 6a and upper spring seat 6b, the upper-end surface of upper spring cover 6a is resisted against the upper back-up ring 3b of upper fixing element, and the lower end surface of upper spring seat 6b is resisted against on floating piston 5.
Between floating piston 5 and outer bulge loop 2e, be placed with lower limit assembly, lower limit assembly comprises the lower spring cover 7a that is enclosed within mounting pipe 2 outsides and the lower spring cup 7b that is enclosed within mounting pipe 2 outsides, lower spring 7c is placed between lower spring cover 7a and lower spring cup 7b, it is upper that the lower end surface of lower spring cover 7a is resisted against outer bulge loop 2e, and the upper-end surface of lower spring cup 7b is resisted against on floating piston 5.
Fixed spool 8 is also installed in mounting pipe 2, and fixed spool 8 is placed on position between outer bulge loop 2e and lower fixed block, between fixed spool 8 outer walls and valve body 1 inwall, has liquid chunnel 9, fixed spool 8 comprises platen 8a, field coil 8b, housing 8c, pressing disc 8d and insulating bush 8f, housing 8c side wall upper part has coil recess, field coil 8b is wrapped in coil recess, and coil recess outside cover has insulating bush 8f, upper platen 8a is fixed on housing 8c upper-end surface, the upper-end surface of upper platen 8a is resisted against on outer bulge loop 2e, pressing disc 8d is fixed on the lower end surface of housing 8c, the lower end surface of pressing disc 8d is resisted against the lower back-up ring 4b of lower fixed block, housing 8c adopts high permeability material to make, upper platen 8a adopts extremely low permeability magnetic material to make, fairlead 8h runs through the housing 8c of fixed spool 8, pressing disc 8d and mounting pipe 2, the two ends field coil lead-in wire 8j of field coil 8b stretches out outside mounting pipe 2 by fairlead 8h, the field coil lead-in wire 8j of field coil 8b is respectively through fairlead 8h, mounting pipe 2 and upper cover plate 1a stretch out outside valve body 1, the field coil lead-in wire 8j of field coil 8b scribbles sealing compound.
The cavity in valve body 1 is divided into epicoele 10, lumen 11 and cavity of resorption 12 by floating piston 5 and fixed spool 8, epicoele 10, lumen 11 and cavity of resorption 12 are all filled with magnetic flow liquid, on epicoele 10 sidewalls, have the accumulator interface 1f communicating with the external world, the position of accumulator interface 1f in floating piston 5 at the upside of maximum displacement place upwards, on cavity of resorption 12 sidewalls, have the oil cylinder interface 1g communicating with the external world, between epicoele 10 and lumen 11, sealing mutually, is interconnected by liquid chunnel 9 between lumen 11 and cavity of resorption 12.
As shown in Figs. 3-4
When use, the inductor coil lead-in wire 2d of inductor coil 2a is connected with Out let 15, Out let 15 is communicated with peripheral control unit 20 by signal pre-processing circuit 19; The field coil lead-in wire 8j of field coil 8b is connected with excitation source 16.
This orifice valve, between accumulator 13 and oil cylinder 14, communicates with accumulator 13 by accumulator interface 1f, communicates with oil cylinder 14 by oil cylinder interface 1g, and the confining liquid circulation flow path of composition hydro-pneumatic suspension system.
Floating piston 5 is separated magnetic flow liquid in this orifice valve, and in the time that wheel moves up and down, under the promotion of magnetic flow liquid, floating piston 5 slides up and down along mounting pipe 2, and therefore, the movement velocity of floating piston 5 has reflected the movement velocity of wheel with respect to vehicle body.
In the time that wheel moves up and down, magnetic flow liquid, by fixed spool 8 liquid chunnels 9, produces damping force, when fixed spool 8 liquid chunnels 9 have externally-applied magnetic field to do the used time, magnetic flow liquid in fixed spool 8 liquid chunnels 9 " solidifies ", and magnetic flow liquid generation viscoplastic flow increases damping force; The size of damping force is relevant with externally-applied magnetic field size, and externally-applied magnetic field size is relevant with size of current in field coil 8b, therefore can change the damping force size of this orifice valve by the electric current in adjusting field coil 8b.
Upper cover plate 1a, lower cover plate 1c and upper platen 8a are extremely low permeability magnetic material and process, and sleeve 1b, floating piston 5, fixed spool 8 and wire winding rod 2b are processed by high permeability material, and mounting pipe 2 is processed by low permeability magnetic material.
Signal generator 18 produces a sinusoidal alternating voltage detection signal, and this testing signal is as a part for excitation source 16 input signals, and by field coil lead-in wire, 8j sends into field coil 8b, and now field coil 8b produces a same frequency alternating magnetic field; In fixed spool 8, liquid chunnel 9, sleeve 1b, floating piston 5, mounting pipe 2, wire winding rod 2b, form an Operating In Persistent Current Mode magnetic circuit 17, the magnetic field overwhelming majority magnetic flux that field coil 8b produces is by this magnetic circuit, the main flux that forms working sensor, inductor coil 2a produces a same frequency alternating voltage signal.
Because the main flux of Operating In Persistent Current Mode magnetic circuit 17 is constant, in the time of road excitation, between wheel and vehicle body, there is relative movement, floating piston 5 moves up and down along mounting pipe 2, the coil turn of inductor coil 2a in Operating In Persistent Current Mode magnetic circuit 17 correspondingly changed, the induction of inductor coil 2a two ends produces a voltage signal, the information that this voltage signal comprises vibration velocity size, the voltage signal of inductor coil 2a is drawn by inductor coil lead-in wire 2d, be input to signal pre-processing circuit 19, send into peripheral control unit 20, thereby realize vibration velocity sensing.
Simultaneously, the vibration velocity size information that peripheral control unit 20 senses according to inductor coil 2a, carry out after corresponding computing, control signal being converted to analogue signal and sending into drive circuit 21, drive circuit 21 produces a corresponding electric current, and the testing signal producing by addition coupling circuit 22 and signal generator 18 is synthetic, as the excitation source 16 of field coil 8b; Change by the size of current that regulates drive circuit 21 magnetic intensity that field coil 8b produces, this magnetic field is high magnetic fields, thereby changes the damping ratio of liquid chunnel 9 place's magnetic flow liquids, realizes the automatic adjustable function of damping.
This model utility, by integrated to orifice valve and velocity transducer, has avoided sensor to be directly exposed in severe external environment, therefore reliability is high; This external magnetorheological hydro-pneumatic suspension system orifice valve can automatic sensing wheel with respect to the vibration velocity of vehicle body, and the voltage swing producing according to inductor coil 2a carries out the corresponding adjusting of damping, thereby realizes half ACTIVE CONTROL of hydro pneumatic suspension.
Above-mentioned high permeability material (being soft magnetic material) is selected commercially available stainless steel material conventionally; Above-mentioned extremely low permeability magnetic material (being non-magnet_conductible material) is selected commercially available aluminum material conventionally.
Above-described is only a kind of mode of execution of the present utility model; it should be pointed out that for the person of ordinary skill of the art, do not departing under the prerequisite of the utility model principle; can also make some modification and improvement, these also should be considered as belonging to protection domain of the present utility model.
Claims (5)
1. the magnetorheological hydro pneumatic suspension orifice valve of vehicle, in comprising, there are valve body, mounting pipe and the floating piston of cavity, in valve body, fixed placement has mounting pipe, in mounting pipe, be provided with inductor coil and wire winding rod, inductor coil is wrapped in outside wire winding rod, and inductor coil two ends lead-in wire stretches out outside mounting pipe, and floating piston is installed in mounting pipe, it is characterized by:
Mounting pipe outer wall is disposed with upper fixing element, middle fixed block and lower fixed block from top to bottom, floating piston is arranged between upper fixing element and middle fixed block, between floating piston and upper fixing element, be placed with upper limit assembly, upper limit assembly at least comprises upper spring, between floating piston and middle fixed block, be placed with lower limit assembly, lower limit assembly at least comprises lower spring;
In mounting pipe, be also provided with fixed spool, and fixed spool is placed on position between middle fixed block and lower fixed block, between fixed spool and valve interior wall, has space;
The cavity in valve body is divided into epicoele, lumen and cavity of resorption by floating piston and fixed spool, has the accumulator interface communicating with the external world on epicoele sidewall, has the oil cylinder interface communicating with the external world on cavity of resorption sidewall;
Described fixed spool comprises platen, field coil, housing and insulating bush, and housing sidewall top has coil recess, and field coil is wrapped in coil recess, and outside coil recess, cover has insulating bush, and upper platen is fixed on housing upper-end surface;
Fairlead runs through fixed spool and mounting pipe, and the two ends lead-in wire of field coil stretches out outside mounting pipe by fairlead.
2. the magnetorheological hydro pneumatic suspension orifice valve of vehicle according to claim 1, is characterized in that: the housing of described floating piston, wire winding rod and fixed spool all adopts high permeability material to make; The upper platen of fixed spool adopts non-magnet_conductible material to make; The upper and lower end face of described valve body adopts non-magnet_conductible material to make, and the sidewall of valve body adopts high permeability material to make.
3. the magnetorheological hydro pneumatic suspension orifice valve of vehicle according to claim 1, is characterized in that: the lead-in wire of described field coil and the lead-in wire of inductor coil scribble sealing compound, the upper and lower two ends of inductor coil are respectively arranged with insulation rubber seal.
4. the magnetorheological hydro pneumatic suspension orifice valve of vehicle according to claim 1, it is characterized in that: described upper limit assembly also comprises the upper spring cover that is enclosed within mounting pipe outside and the upper spring seat that is enclosed within mounting pipe outside, and upper spring is placed between upper spring cover and upper spring seat; Described lower limit assembly also comprises the lower spring cover that is enclosed within mounting pipe outside and the lower spring cup that is enclosed within mounting pipe outside, and lower spring is placed between lower spring cover and lower spring cup.
5. the magnetorheological hydro pneumatic suspension orifice valve of vehicle according to claim 1, is characterized in that: described upper fixing element is made up of the upper snap ring coordinating with mounting pipe and upper back-up ring; Described middle fixed block is the outer bulge loop of mounting pipe outer wall; Described lower fixed block is made up of the lower snap ring coordinating with mounting pipe and lower back-up ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420052440.7U CN203836065U (en) | 2014-01-27 | 2014-01-27 | Vehicle magneto-rheological oil-gas suspension damper valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420052440.7U CN203836065U (en) | 2014-01-27 | 2014-01-27 | Vehicle magneto-rheological oil-gas suspension damper valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203836065U true CN203836065U (en) | 2014-09-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420052440.7U Withdrawn - After Issue CN203836065U (en) | 2014-01-27 | 2014-01-27 | Vehicle magneto-rheological oil-gas suspension damper valve |
Country Status (1)
| Country | Link |
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| CN (1) | CN203836065U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103758911A (en) * | 2014-01-27 | 2014-04-30 | 安徽柳工起重机有限公司 | Vehicle magneto-rheological oil gas suspension damping valve |
| CN110815818A (en) * | 2018-08-14 | 2020-02-21 | 浙江迅实科技有限公司 | 3D printing device, demolding method and liquid containing mechanism thereof |
| US11780158B2 (en) | 2018-08-14 | 2023-10-10 | Zhejiang Xunshi Technology Co. Ltd | 3D printing device, and release method and liquid containing mechanism therefor |
-
2014
- 2014-01-27 CN CN201420052440.7U patent/CN203836065U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103758911A (en) * | 2014-01-27 | 2014-04-30 | 安徽柳工起重机有限公司 | Vehicle magneto-rheological oil gas suspension damping valve |
| CN103758911B (en) * | 2014-01-27 | 2016-02-10 | 安徽柳工起重机有限公司 | The magnetorheological hydro pneumatic suspension orifice valve of vehicle |
| CN110815818A (en) * | 2018-08-14 | 2020-02-21 | 浙江迅实科技有限公司 | 3D printing device, demolding method and liquid containing mechanism thereof |
| US11780158B2 (en) | 2018-08-14 | 2023-10-10 | Zhejiang Xunshi Technology Co. Ltd | 3D printing device, and release method and liquid containing mechanism therefor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140917 Effective date of abandoning: 20160210 |
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| C25 | Abandonment of patent right or utility model to avoid double patenting |