CN102192205A - Multi-section stroke fluid power device - Google Patents
Multi-section stroke fluid power device Download PDFInfo
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- CN102192205A CN102192205A CN2011101272457A CN201110127245A CN102192205A CN 102192205 A CN102192205 A CN 102192205A CN 2011101272457 A CN2011101272457 A CN 2011101272457A CN 201110127245 A CN201110127245 A CN 201110127245A CN 102192205 A CN102192205 A CN 102192205A
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- 239000012530 fluid Substances 0.000 title claims abstract description 61
- 230000008676 import Effects 0.000 claims description 2
- 230000005540 biological transmission Effects 0.000 abstract 1
- 230000007547 defect Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 14
- 230000033001 locomotion Effects 0.000 description 9
- 230000000694 effects Effects 0.000 description 7
- 238000007789 sealing Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000007812 deficiency Effects 0.000 description 2
- 208000002925 dental caries Diseases 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000000875 corresponding effect Effects 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
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Abstract
The invention discloses a multi-section stroke fluid power device to overcome the defects of complex structure, high cost, poor reliability and narrow application range of the prior art. The multi-section stroke fluid power device comprises a fluid source, an input end, a first throttle valve, a second throttle valve, a first input and pressure-release hole, a second input and pressure-release hole, a first electromagnetic valve, a fourth electromagnetic valve, a cylinder, a piston, a first pressure-release hole, a second pressure-release hole, a second electromagnetic valve and a third electromagnetic valve, wherein both the first throttle valve and the second throttle valve are connected with the output end of the fluid source; the first input and pressure-release hole and the second input and pressure-release hole are connected with the output ends of the first throttle valve and the second throttle valve respectively; the first electromagnetic valve and the fourth electromagnetic valve are connected with the first input and pressure-release hole and the second input and pressure-release hole respectively; the cylinder is communicated with the first input and pressure-release hole and the second input and pressure-release hole; the piston is hermetically connected with the cylinder; the first pressure-release hole and the second pressure-release hole are communicated with the cylinder; and the second electromagnetic valve and the third electromagnetic valve are connected with the first pressure-release hole and the second pressure-release hole respectively. The multi-section stroke fluid power device has the characteristics of simple structure, high reliability, low cost and wide application range, and can be widely applied in the field of transmission cases and machine work.
Description
Technical field
The present invention relates to the multiposition actuating device, particularly relate to a kind of multistage stroke fluid power plant.
Background technique
Existing multistage stroke actuating device is mainly used in lathe and robot aspect, comprises that electricity drives servo unit, stepping unit etc., be characterized in the positioning control accuracy height, but the environment tolerance is poor, the cost height.Existing pneumatic or hydraulic driving actuating device realizes that the positioning control more than three adopts the close-loop control mode of position sensing usually, when state exchange, need carry out position judgment, being equipped with special-purpose intelligent control device simultaneously could realize, not only the control logic relation is complicated, and system architecture complexity, cost height, poor reliability, limited the using scope of multistage stroke actuating device.
Summary of the invention
The objective of the invention is in order to overcome the deficiency of above-mentioned background technology, a kind of multistage stroke fluid power plant is provided, make it have characteristics simple in structure, that reliability is high, cost is low, widely applicable.
A kind of multistage stroke fluid power plant provided by the invention, comprise fluid source, the first throttle valve that input end all links to each other with the fluid source output terminal and second throttle valve, import and relief hole with first input and relief hole and second that the first throttle valve links to each other with the second throttle valve output terminal respectively, first solenoid valve and the 4th solenoid valve that links to each other with second input and relief hole with first input and relief hole respectively, cylinder that is communicated with and second input and relief hole of first input and relief hole and the piston that is connected with cylinder seal, described multistage stroke fluid power plant also are provided with and first relief hole of cylinder connection and second relief hole and second solenoid valve and the 3rd solenoid valve that link to each other with second relief hole with first relief hole respectively.
In technique scheme, described multistage stroke fluid power plant also is provided with the 5th solenoid valve, the 6th solenoid valve, first one-way valve and second one-way valve, the input end of described first one-way valve and second one-way valve links to each other with the output terminal of first throttle valve with second throttle valve respectively, the output terminal of first one-way valve and second one-way valve is connected with second input and relief hole with first input and relief hole respectively, one end of described the 5th solenoid valve and the 6th solenoid valve all links to each other with fluid source, and the other end of the 5th solenoid valve and the 6th solenoid valve is connected with second input and relief hole with first input and relief hole by the output terminal of first one-way valve and second one-way valve respectively.
In technique scheme, described multistage stroke fluid power plant also is provided with the PLC control unit, and described PLC control unit is connected with first solenoid valve, second solenoid valve, the 3rd solenoid valve and the 4th solenoid valve respectively.
In technique scheme, described multistage stroke fluid power plant also is provided with the PLC control unit, and described PLC control unit is connected with first solenoid valve, second solenoid valve, the 3rd solenoid valve, the 4th solenoid valve, the 5th solenoid valve and the 6th solenoid valve respectively.
In technique scheme, described piston has only an end to be provided with piston rod.
In technique scheme, described piston two ends are equipped with piston rod.
Multistage stroke fluid power plant of the present invention, has following beneficial effect: owing to adopted the mode of natural closed-loop feedback in open loop control and the structure, the external control of multistage stroke fluid power plant is very simple, because device is few, simple in structure, so reliability height, cost are low, widely applicable.
Description of drawings
Fig. 1 is multistage stroke fluid power plant embodiment's 1 of the present invention structural representation;
Fig. 2 is multistage stroke fluid power plant embodiment's 1 of the present invention manual control circuit figure;
Fig. 3 is multistage stroke fluid power plant embodiment's 1 of the present invention automatically controlled circuit diagram;
Fig. 4 is multistage stroke fluid power plant embodiment's 2 of the present invention structural representation;
Fig. 5 is multistage stroke fluid power plant embodiment's 2 of the present invention automatically controlled circuit diagram;
Fig. 6 is for offering the structural representation of air cylinder of input and relief hole and relief hole among the present invention.
Embodiment
The present invention is described in further detail below in conjunction with drawings and Examples, but this embodiment should not be construed as limitation of the present invention.
Referring to Fig. 1 and Fig. 6, multistage stroke fluid power plant of the present invention comprises fluid source 1, first throttle valve 2, second throttle valve 3, first solenoid valve 4, second solenoid valve 5, the 3rd solenoid valve 6, the 4th solenoid valve 7, first input and relief hole 10, first relief hole 11, second relief hole 12, second input and relief hole 13, piston 14 and the cylinder 15.
The input end of the first throttle valve 2 and second throttle valve 3 all links to each other with the output terminal of fluid source 1, and in the present embodiment, fluid source 1 is a source of the gas.First input and relief hole 10 link to each other with the output terminal of first throttle valve 2 with second throttle valve 3 respectively with second input and relief hole 13, first input and relief hole 10, first relief hole 11, second relief hole 12 and second input and relief hole 13 all are connected with cylinder 15, be provided with the piston 14 that is tightly connected with cylinder 15 in the cylinder 15, in the present embodiment, piston 14 has only an end to be provided with piston rod 14.1, certainly, piston 14 two ends also can be equipped with piston rod 14.1.First solenoid valve 4, second solenoid valve 5, the 3rd solenoid valve 6 and the 4th solenoid valve 7 link to each other with first input and relief hole 10, first relief hole 11, second relief hole 12 and second input and relief hole 13 respectively.
Referring to Fig. 2, in the control circuit except that first solenoid valve 4, second solenoid valve 5, the 3rd solenoid valve 6 and the 4th solenoid valve 7 that insert, be equipped with the switch that links to each other with each solenoid valve, this circuit can be by manually controlling the keying of first solenoid valve 4, second solenoid valve 5, the 3rd solenoid valve 6 and the 4th solenoid valve 7 respectively.
Referring to Fig. 3, in the control circuit except that first solenoid valve 4, second solenoid valve 5, the 3rd solenoid valve 6 and the 4th solenoid valve 7 that insert, also be provided with the PLC that is connected with the 4th solenoid valve 7 with first solenoid valve 4, second solenoid valve 5, the 3rd solenoid valve 6, can control the keying of first solenoid valve 4, second solenoid valve 5, the 3rd solenoid valve 6 and the 4th solenoid valve 7 by this PLC automatically.
Because hydraulic driving and air pressure driving structure and principle are basic identical, so present embodiment is the working procedure of example explanation multistage stroke fluid power plant with the air pressure driving.
When fluid source 1 is connected gas, suppose that first solenoid valve 4, second solenoid valve 5, the 3rd solenoid valve 6 and the 4th solenoid valve 7 all do not have electrical signal and be in cut-off state.Fluid source 1 is given cylinder 15 air feed via the first throttle valve 2 and second throttle valve 3, at this moment cylinder 15 chamber internal air pressures can rise to gradually with fluid source 1 air pressure and equate, piston 14 is divided into two cavitys with cylinder 15, when piston 14 has only an end to be provided with piston rod 14.1, be about to cylinder 15 cavitys and be divided into rod chamber 15.1 and rodless cavity 15.2.Because the existence of piston rod 14.1, piston 14 useful area of rod chamber 15.1 one sides are less than piston 14 useful area of rodless cavity 15.2 one sides, so thrust that the thrust that rodless cavity 15.2 one sides produce under same pressure produces greater than rod chamber 15.1 one sides, at this moment piston can be to rod chamber 15.1 one lateral movements, until moving to the end inwall that is positioned at rod chamber 15.1 one sides near cylinder 15, this can have adverse effect to the application that the initial position requirement is arranged, so when piston 14 has only an end to be provided with piston rod 14.1, must before fluid source 1 is connected, clearly provide position control signal, make initial position determine.When being equipped with piston rod 14.1, piston 14 two ends then do not have this problem.
After the above air feed process of boosting finishes, if control signal is arranged this moment to be connected, suppose to open the 3rd solenoid valve 6, at this moment second relief hole 12 and the atmosphere conducting pressure release, the piston one side air pressure at second relief hole, 12 places is dropped rapidly near barometric pressure, and the opposite side of piston just slightly descends, and fall depends on device sealing situation and source of the gas gas supply capacity.Exist in both sides under the situation of pressure difference, piston 14 moves to second relief hole, 12 positions.When piston 14 moves to second relief hole 12, piston head 14.2 can be blocked second relief hole 12, at this moment the pressure release flow reduces, piston 14 pressure at both sides differences reduce simultaneously, and are when piston 14 has only an end to be provided with piston rod 14.1, different because the useful area of pressure is born in piston 14 both sides, piston 14 can move to a side of second relief hole 12 and stop, make that rod chamber 15.1 is sealed fully, and rodless cavity 15.2 there is leakage slightly, at this moment can keep dynamic balance.And when piston 14 two ends are equipped with piston rod 14.1, stop and second relief hole 12 sealed fully in the position that piston 14 can just move to second relief hole 12.
When piston 14 has only an end to be provided with piston rod 14.1, if also need piston 14 to move to other inputs and relief hole or relief hole, only need to open earlier the respective electrical magnet valve, closing the 3rd solenoid valve 6 again gets final product, no matter open earlier that afterwards to close be the uncertain motion that causes for fear of in the case inherent characteristic, be to adopt manual control shown in Figure 2 or all need follow this principle with PLC control electromagnetic valve shown in Figure 3.When being equipped with piston rod 14.1, piston 14 two ends then do not have this requirement.
Thereby the setting of the first throttle valve 2 and second throttle valve 3 is to promote piston 14 motions in order to make piston 14 two ends can produce pressure difference, can also play the speed governing effect of certain limit simultaneously.Be subjected to the influence of fluid source 1 gas supply flow, first throttle valve 2 and second throttle valve, 3 apertures can not be excessive, can cause pressure difference not enough like this, piston 14 thrust deficiencies, even complete cisco unity malfunction, therefore under the situation that satisfies the requirement of piston 14 movement velocitys, throttle valve opening is reduced, help reducing air consumption and energy consumption.
The Location accuracy of piston 14 depends on the input that the axial width of piston 14 sealing surfaces and cylinder 15 are set and the difference of relief hole and relief hole axial width, the axial width of piston 14 sealing surfaces must be greater than the axial width of input and relief hole and relief hole, otherwise will seal incessantly input and relief hole and relief hole, collaborate in piston 14 both sides simultaneously, causes out of control.
Because multistage stroke fluid power plant need perforate on cylinder 15, cause being sealed and matched of cylinder 15 inwalls discontinuous, if piston 14 adopts rubber o-ring sealing (not shown), seal ring can swell when moving to input and relief hole or relief hole, when increasing between piston 14 and the cylinder 15 resistance, seal ring self also constantly is subjected to the effect of shearing force, causes working life short.So have only adopt the matching gap reduce piston 14 and cylinder 15 or adopt harder elastic material for example polytetrafluoroethylmaterial material make seal ring.
Among the embodiment 1 because throttle valve and fluid source 1 air feed quantitative limitation, piston 14 speed increase limited, needing the occasion of high-speed motion, as high speed kinds of goods sorting conveyer, need the device snap action, the inapplicable this occasion of multistage stroke fluid power plant among the embodiment 1 obviously, present embodiment will illustrate the structure and the operating principle of the multistage stroke fluid power plant of high-speed motion.
Present embodiment is identical with embodiment 1 structure major part, difference is: referring to Fig. 4 and Fig. 6, described multistage stroke fluid power plant has increased by the 5th solenoid valve 8, the 6th solenoid valve 9, first one-way valve 16 and second one-way valve 17, the input end of described first one-way valve 16 and second one-way valve 17 links to each other with the output terminal of first throttle valve 2 with second throttle valve 3 respectively, first one-way valve 16, be connected with second input and relief hole 13 with first input and relief hole 10 respectively with the output terminal of second one-way valve 17, one end of described the 5th solenoid valve 8 and the 6th solenoid valve 9 all links to each other with fluid source 1, and the other end of the 5th solenoid valve 8 and the 6th solenoid valve 9 is connected with second input and relief hole 13 with first input and relief hole 10 by the output terminal of first one-way valve 16 and second one-way valve 17 respectively.
Referring to Fig. 5, in the control circuit except that first solenoid valve 4, second solenoid valve 5, the 3rd solenoid valve 6, the 4th solenoid valve 7, the 5th solenoid valve 8 and the 6th solenoid valve 9 that insert, also be provided with the PLC that is connected with the 6th solenoid valve 9 with first solenoid valve 4, second solenoid valve 5, the 3rd solenoid valve 6, the 4th solenoid valve 7, the 5th solenoid valve 8, can control the keying of first solenoid valve 4, second solenoid valve 5, the 3rd solenoid valve 6, the 4th solenoid valve 7, the 5th solenoid valve 8 and the 6th solenoid valve 9 by this PLC automatically.
Still be the working procedure of example explanation multistage stroke fluid power plant below with the air pressure driving.
The 5th solenoid valve 8 and the 6th solenoid valve 9 are driven with certain sequential by the PLC shown in Fig. 5, can certainly be that single-chip microcomputer is controlled.System's initial procedure is similar to embodiment 1, and after fluid source 1 was connected gas, gas was given cylinder 15 air feed through the first throttle valve 2 and second throttle valve 3, because piston 14 has only an end to be provided with piston rod 14.1, must provide initial position signal earlier during control.After supposing that first relief hole 11 is initially finished, piston 14 is positioned at first relief hole 11.If need move to second relief hole, 12 positions this moment, then need to open earlier the 3rd solenoid valve 6, after close second solenoid valve 5.If do not give the 5th solenoid valve 8 and the 6th solenoid valve 9 corresponding action signals this moment, the movement velocity of piston 14 is identical with embodiment 1 so.If when opening the 3rd solenoid valve 6, give alternately control wave to the five solenoid valves 8 and the 6th solenoid valve 9 of certain time length, at this moment the 5th solenoid valve 8 and the 6th solenoid valve 9 just bypass the first throttle valve 2 and second throttle valve 3, the gas that comes out from fluid source 1 has not just had throttling action, the travelling speed of piston 14 is improved, one side at second relief hole, 12 places is because second relief hole 12 pressure release with the atmosphere conducting, and the pressure rises speed of opposite side is faster, thereby make and a side air pressure at second relief hole, 12 places is arranged less than opposite side air pressure, piston 14 by first relief hole 11 to second relief hole, 12 fast moving, stop motion when piston head 14.2 is blocked second relief hole 12, wherein, 9 of the 5th solenoid valve 8 and the 6th solenoid valves are had an effect in all processes of second relief hole, 12 conversions at first relief hole 11, to reach the purpose of piston 14 fast moving.The 5th solenoid valve 8 and the 6th solenoid valve 9 are closed after certain time length, and action promptly comes to an end.Move to reposition if desired as long as carry out identical process.Alternately control impuls conducting the 5th solenoid valve 8 and the 6th solenoid valve 9 are for fear of multistage stroke fluid power plant decompression in the process, because if conducting simultaneously, be subjected to the influence of fluid source 1 gas supply capacity and relief hole, can't set up normal operating pressure in the multistage stroke fluid power plant.When 6 conductings of the 3rd solenoid valve, because the effect of one-way valve, the pressure of no pressure release side only can or not descend in continuous rising under the suitable situation of the 5th solenoid valve 8 and the 6th solenoid valve 9 control impuls width, only can descend and there is the pressure release side pressure can not rise, can not cause piston 14 to-and-fro motion owing to replacing air feed.And the effect of the first throttle valve 2 and second throttle valve 3 is not provide a pre-loading loop before the 5th solenoid valve 8 and the 6th solenoid valve 9 have conducting, sets up holding torque required pressure in position when the 5th solenoid valve 8 and the 6th solenoid valve 9 are closed in release.
According to embodiment 1 and embodiment's 2 explanation as can be seen, multistage stroke fluid power plant is along with the application difference, and thrust, stroke are also different.The determining positions position location of input and relief hole and relief hole, relief hole how much determine the stroke hop count, be positioned at first input at cylinder 15 two ends and relief hole 10 and second input and relief hole 13 and should leave a segment distance with cylinder 15 ends, this plays the effect of buffering apart from meeting, if there is not this segment distance, in the bigger occasion of mechanical inertia, can cause piston 14 collision cylinders 15.Needing can to adopt integrated method under the more situation of stroke, outer member all is integrated on the cylinder 15, guide line and pipeline are only left in the outside, not only make simple in structurely, and improve reliability, and be easy for installation.
This multistage stroke fluid power plant can be applied to motor unit, the actuating device on the production line and the non-pinpoint manipulator device of vehicle gear box, gearbox peculiar to vessel, lathe.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
The content that is not described in detail in this specification belongs to related domain professional and technical personnel's known prior art.
Claims (6)
1. multistage stroke fluid power plant, comprise fluid source (1), first throttle valve (2) and second throttle valve (3) that input end all links to each other with fluid source (1) output terminal, import and relief hole (13) with first input and relief hole (10) and second that first throttle valve (2) links to each other with second throttle valve (3) output terminal respectively, respectively with first input and relief hole (10) and second is imported and relief hole (13) links to each other first solenoid valve (4) and the 4th solenoid valve (7), with first input and relief hole (10) and second input and the cylinder (15) that is communicated with of relief hole (13) and with the piston (14) that cylinder (15) is tightly connected, it is characterized in that: described multistage stroke fluid power plant also is provided with and first relief hole (11) of cylinder (15) connection and second relief hole (12) and second solenoid valve (5) and the 3rd solenoid valve (6) that link to each other with second relief hole (12) with first relief hole (11) respectively.
2. a kind of multistage stroke fluid power plant according to claim 1, it is characterized in that: described multistage stroke fluid power plant also is provided with the 5th solenoid valve (8), the 6th solenoid valve (9), first one-way valve (16) and second one-way valve (17), the input end of described first one-way valve (16) and second one-way valve (17) links to each other with the output terminal of first throttle valve (2) with second throttle valve (3) respectively, the output terminal of first one-way valve (16) and second one-way valve (17) is connected with second input and relief hole (13) with first input and relief hole (10) respectively, one end of described the 5th solenoid valve (8) and the 6th solenoid valve (9) all links to each other with fluid source (1), and the other end of the 5th solenoid valve (8) and the 6th solenoid valve (9) is connected with second input and relief hole (13) with first input and relief hole (10) by the output terminal of first one-way valve (16) and second one-way valve (17) respectively.
3. a kind of multistage stroke fluid power plant according to claim 1, it is characterized in that: described multistage stroke fluid power plant also is provided with the PLC control unit, and described PLC control unit is connected with first solenoid valve (4), second solenoid valve (5), the 3rd solenoid valve (6) and the 4th solenoid valve (7) respectively.
4. a kind of multistage stroke fluid power plant according to claim 2, it is characterized in that: described multistage stroke fluid power plant also is provided with the PLC control unit, and described PLC control unit is connected with first solenoid valve (4), second solenoid valve (5), the 3rd solenoid valve (6), the 4th solenoid valve (7), the 5th solenoid valve (8) and the 6th solenoid valve (9) respectively.
5. according to the described a kind of multistage stroke fluid power plant of arbitrary claim in the claim 1 to 4, it is characterized in that: described piston (14) has only an end to be provided with piston rod (14.1).
6. according to the described a kind of multistage stroke fluid power plant of arbitrary claim in the claim 1 to 4, it is characterized in that: described piston (14) two ends are equipped with piston rod (14.1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101272457A CN102192205A (en) | 2011-05-17 | 2011-05-17 | Multi-section stroke fluid power device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101272457A CN102192205A (en) | 2011-05-17 | 2011-05-17 | Multi-section stroke fluid power device |
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| CN102192205A true CN102192205A (en) | 2011-09-21 |
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| CN2011101272457A Pending CN102192205A (en) | 2011-05-17 | 2011-05-17 | Multi-section stroke fluid power device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106194878A (en) * | 2016-07-22 | 2016-12-07 | 北京机械设备研究所 | A kind of cylinder arrangements for speed regulation being adapted to wide stroke range |
| CN109844326A (en) * | 2016-08-31 | 2019-06-04 | 安沃驰有限责任公司 | Pneumatic control mechanism |
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| US2954755A (en) * | 1957-10-23 | 1960-10-04 | Ibm | Hydraulic positioning device |
| US3792642A (en) * | 1971-03-04 | 1974-02-19 | Nippon Denso Co | System for electrically controlling the movement of a load for stopping same at one of a plurality of predetermined positions |
| GB1385329A (en) * | 1971-04-22 | 1975-02-26 | Bosch Gmbh Robert | Hydraulic motor control devices |
| SU821767A1 (en) * | 1979-06-25 | 1981-04-15 | Всесоюзный Научно-Исследовательскийи Проектно-Конструкторский Институтпромышленных Гидроприводов И Гидро-Автоматики | Step positioner |
| US5226346A (en) * | 1991-05-30 | 1993-07-13 | Mercedes-Benz Ag | Axial piston type pressure medium servomotor control device |
| DE102007020482A1 (en) * | 2007-04-27 | 2008-10-30 | Gerhard Dücker GmbH & Co. KG Landmaschinenfabrik | Mowing or cutting apparatus for attachment to a vehicle has hydraulic cylinder with additional pressure connection which can be closed by piston |
| CN101749301A (en) * | 2008-12-18 | 2010-06-23 | 中集车辆（集团）有限公司 | Hydraulic cylinder device and hydraulic cylinder behavior control system with same |
| CN202132290U (en) * | 2011-05-17 | 2012-02-01 | 武汉智德通信科技有限公司 | Multistage stroke fluid power device |
-
2011
- 2011-05-17 CN CN2011101272457A patent/CN102192205A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2954755A (en) * | 1957-10-23 | 1960-10-04 | Ibm | Hydraulic positioning device |
| US3792642A (en) * | 1971-03-04 | 1974-02-19 | Nippon Denso Co | System for electrically controlling the movement of a load for stopping same at one of a plurality of predetermined positions |
| GB1385329A (en) * | 1971-04-22 | 1975-02-26 | Bosch Gmbh Robert | Hydraulic motor control devices |
| SU821767A1 (en) * | 1979-06-25 | 1981-04-15 | Всесоюзный Научно-Исследовательскийи Проектно-Конструкторский Институтпромышленных Гидроприводов И Гидро-Автоматики | Step positioner |
| US5226346A (en) * | 1991-05-30 | 1993-07-13 | Mercedes-Benz Ag | Axial piston type pressure medium servomotor control device |
| DE102007020482A1 (en) * | 2007-04-27 | 2008-10-30 | Gerhard Dücker GmbH & Co. KG Landmaschinenfabrik | Mowing or cutting apparatus for attachment to a vehicle has hydraulic cylinder with additional pressure connection which can be closed by piston |
| CN101749301A (en) * | 2008-12-18 | 2010-06-23 | 中集车辆（集团）有限公司 | Hydraulic cylinder device and hydraulic cylinder behavior control system with same |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106194878A (en) * | 2016-07-22 | 2016-12-07 | 北京机械设备研究所 | A kind of cylinder arrangements for speed regulation being adapted to wide stroke range |
| CN106194878B (en) * | 2016-07-22 | 2017-12-26 | 北京机械设备研究所 | A kind of cylinder arrangements for speed regulation for being adapted to wide stroke range |
| CN109844326A (en) * | 2016-08-31 | 2019-06-04 | 安沃驰有限责任公司 | Pneumatic control mechanism |
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Application publication date: 20110921 |