EP1039145B1 - Elektrohydraulische Steuereinrichtung - Google Patents
Elektrohydraulische Steuereinrichtung Download PDFInfo
- Publication number
- EP1039145B1 EP1039145B1 EP00100019A EP00100019A EP1039145B1 EP 1039145 B1 EP1039145 B1 EP 1039145B1 EP 00100019 A EP00100019 A EP 00100019A EP 00100019 A EP00100019 A EP 00100019A EP 1039145 B1 EP1039145 B1 EP 1039145B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- control device
- gear
- electrohydraulic control
- spring
- worm
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
- F15B13/0401—Valve members; Fluid interconnections therefor
- F15B13/0402—Valve members; Fluid interconnections therefor for linearly sliding valves, e.g. spool valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
- F15B13/044—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by electrically-controlled means, e.g. solenoids, torque-motors
Definitions
- the invention is based on an electro-hydraulic Control device according to the preamble of claim 1 specified genus.
- Control device known from DE 36 39 174 A1, in which for controlling volume flows to a hydraulic Servomotor a arranged in a valve housing Control spool of two magnets from a spring-centered Middle position on both sides in working positions is deflectable.
- a double-acting one Reset device provided, in which two are concentric nested springs with different sizes Diameters in a common chamber on one side of the Control spool are arranged.
- Control devices with directly magnetically confirmed Control spool must compensate for tolerances for each One operating point in the direction of the deflection - be adjusted in order to ensure a coordination between To achieve control device and control electronics.
- DE 44 46 143 A1 is electromagnetic actuated pressure medium valve for controlling Volume flows known in which to adjust the Operating point an adjustment device is provided.
- the Adjusting device has a worm gear with which the change in the bias of the spool loading spring during the hydraulic test is infinitely feasible.
- the disadvantage of this Control device is, however, that this pressure medium valve has only a single magnet and thus for one single-acting function is designed; a double-acting reset device for the spool is not available here.
- EP 0 845 602 A2 electrohydraulic control device known for a 4/2 function is designed.
- this Control device are for setting Operating points provided two adjustment devices, wherein two worm gears are provided in the valve housing. While with a worm gear as a gear trained spring plate is adjusted, that works second worm gear on the opposite valve housing - End on a valve sleeve of a poppet valve to the there Adjust the control edge.
- the disadvantage is that this too Control device only for a single-acting function a single magnet is formed so that the Valve elements from an initial position only in one Direction can be deflected.
- This arrangement is therefore suitable not for a double-acting reset device in which two springs are arranged concentrically one inside the other. moreover require at opposite ends of the valve body lying worm gear and a lot of space and are also expensive.
- the electrohydraulic control device with the characterizing features of claim 1 on the other hand the advantage that with her at a double-acting reset device a change of Spring preloads during the hydraulic test is continuously possible in one operation. So it can a precise setting with the valve installed Operating conditions take place, this setting via receive the entire operating time of the control device remains.
- the double-acting Reset device with small dimensions and from relative create simple components. With the adjustment of the The test and response time becomes the operating point from the outside significantly shortened. You can also change the setting perform sensitively and precisely.
- the is also suitable Control device for different magnetic drives from two individual magnets or from a double stroke magnet can exist.
- FIG. 1 shows a simplified representation a longitudinal section through an electrohydraulic Control device with a double-acting Reset device according to the prior art Technology
- Figure 2 shows a longitudinal section through part of a electrohydraulic control device with a double-acting reset device according to the invention in simplified and enlarged representation
- Figure 3 a Cross section according to I-I in Figure 2
- Figure 4 a Cross section according to II-II in Figure 2.
- FIG. 1 shows a simplified representation Longitudinal section through an electro-hydraulic Control device 10 in a state of the art counting known design.
- the control device 10 has a directional control valve 11 in a valve housing 12 a Control spool 13 picks up.
- the control slide 13 is from a double-acting reset device 14 in the drawn centered position, from which it passes through a first and second magnet in opposite Directions can be deflected in working positions.
- the two magnets 15, 16 are on opposite End faces of the valve housing 12 mounted, the double-acting reset device 14 between the first Magnet 15 and the valve housing 12 is arranged.
- a measuring orifice 18 in an inlet channel 19 and over Check valve 21 flow into an inlet chamber 22.
- the control slide 13 can actuate the first magnet 15 against the force of the reset device 14 from his Center position are deflected to the right, one first control edge 23 the connection from the inlet chamber 22 controls to a first motor chamber 24 while at the same time a third control edge 25 a second Motor chamber 26 connects to a return chamber 27.
- the second magnet 16 is energized and the control slide 13 from the drawn middle position against the force of Reset device 14 deflected to the left, opens the second control edge 28 the connection from the inlet chamber 22 to the second motor chamber 26 while the first Motor chamber 24 via a fourth control edge 29 to one Return chamber 31 is relieved.
- the double-acting reset device 14 points to Center the spool 13 in its central position two concentrically arranged, one inside the other Springs 32 and 30 on corresponding to the two Operating directions.
- the inner spring 32 acts against the Power of the left first magnet 15.
- the preload of the inner spring 32 can with the help of a Adjust the adjusting device 33, for which the inner spring 32 supporting spring plate 34 a thread arrangement has and attached to a spool 13 Threaded bolt 35 is arranged axially adjustable. Will the second, right magnet 16 excited, this works against the outer spring 30, which extends over a second spring plate 36 fixed to the housing.
- To preload the outer To change spring 30 are between the second spring plate 36 and the first magnet 15 not shown Washers inserted.
- Both springs 32, 30 are with their spring plates 34, 36 in an actuator housing 37 Reset device 14 arranged between the Valve housing 12 and the first magnet 15 is flanged.
- an operating point is adjusted to compensate for tolerances.
- This also serves to coordinate between directional valve 11 and Drive electronics.
- one operating point each adjusted, for example an oil flow of 1 liter per Minute with an electric current of 0.5 ampere is set.
- This setting of the operating points takes place by changing the force of the springs 32, 30, against which the magnets 15, 16 control spool 13 deflect.
- the spring forces must be reached during the hydraulic Testing the first magnet 15 to be removed; such interruption that may be necessary several times disturbs the Testing and is expensive.
- FIG. 2 now shows a simplified longitudinal section through a control device 40 according to the invention, which differs from the Control device 10 according to FIG. 1 differs as follows, the same reference numerals for the same components be used.
- the control device 40 has one Double-acting reset device 41 according to the invention on, with its actuator housing 42 between the Electromagnet 15 and the directional control valve 11 is flanged.
- the the inner spring 32 supporting first spring plate 34 now formed as the first gear 43, which with its Output teeth 44 arranged in an outer circumference in a first adjustment spindle 45, which is transverse to the longitudinal axis of the Control spool 13 is mounted in the control housing 42.
- the gear 43 and adjusting spindle 45 thus form a first gear 46, with which the bias of the inner spring 32 from the outside is adjustable.
- the first gear 43 has on its Control slide 13 facing a sleeve-shaped Approach 47, inside of which the inner spring 32nd is arranged, and on which it is supported.
- the first Gear 43 with shoulder 47 is inside the inner spring 32nd penetrated by a bolt 48 fastened to the slide 13, on which a bushing 51 is located via a snap ring 49 supports, which serves as an abutment for the inner spring 32.
- the tubular extension 47 has a guide thread 52 on the outside with which the first gear 43 in a second gear 53 is mounted so that the first gear 43 at a Rotational movement relative to the second gear 53 axially is adjustable.
- the second gear 53 which is the function of the second Spring plates 36 takes over, serves to support the outer Spring 30.
- the second gear 53 is essentially executed sleeve-shaped and has on its outer circumference second guide thread 54 with which it is axially adjustable is guided in the control housing 42. Furthermore, the second one Gear 53 on a opposite the second guide thread 54 reduced diameter an output gear 55, with which it meshes in a second adjusting spindle 56, the parallel to the first adjusting spindle 45 in the adjusting housing 42 is stored.
- the second adjusting spindle 56 forms with the second gear 53, a second gear 57 with which the Bias of the outer spring 30 is adjustable.
- the second Gear 53 is in this way with two guide threads equipped, the 52 in its first guide thread first gear 43 is guided while it is with its second Guide thread 54 itself is guided in the control housing 42.
- the two Adjustment spindles 45 and 56 each of the same Outer wall 58 are accessible to adjust them simplify.
- the output gears 44 and 55 are on two gears 43, 53 with the same diameter executed so that the adjusting spindles 45, 56th are mutually executable.
- the two gears 46 and 47 are particularly useful as Worm gear designed, each worm 45 and 56th in their axial direction by a pin 59 is fixed in a closed by a ball 61 Drill hole 62.
- For tolerance compensation for the inner Spring 32 and the outer spring 30 are only relatively small Strokes required so that the wheel widths of the gears 43rd or 53 can be selected accordingly short.
- control device 40 with the double-acting reset device 41 can for Adjustment of the operating points the preload of the inner Spring 32 and that of the outer spring 30 during the hydraulic testing continuously in one operation be changed. It is like this with a setting proceeded that first with the second adjusting spindle 56 via the second gear 53 the bias of the outer spring 30 is adjusted on the second magnet 16. With this Adjustment process is the second adjustment spindle 56 second gear 53 rotated, this Rotary movement with the help of the second guide thread 54 in an axial movement of the second spring plate 36 is converted becomes.
- the double-acting reset device can for both switching and proportional working magnets can be used. Even though Worm gears are particularly advantageous use other suitable types of gears.
- Magnet drive can also be designed as a double-stroke magnet then the magnetic plunger for a pulling and pushing Actuation of the control slide is hooked in; expediently double solenoid and Reset device on opposite sides of the Valve housing arranged.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Magnetically Actuated Valves (AREA)
- Valve Device For Special Equipments (AREA)
Description
Claims (14)
- Elektrohydraulische Steuereinrichtung (10) zur Steuerung der Volumenströme zu einem hydraulischen Stellmotor abhängig von elektrischen Eingangssignalen an einem Magnetantrieb (15, 16), durch welchen ein in einem Ventilgehäuse (12) gelagerter Steuerschieber (13) aus einer federzentrierten Mittelstellung nach beiden Seiten in Arbeitsstellungen auslenkbar ist, wobei der Steuerschieber durch eine doppeltwirkende Rückstelleinrichtung (14) in der Mittelstellung zentriert ist, bei der eine innere und eine äußere Feder (32 bzw. 30) auf der gleichen Seite des Steuerschiebers konzentrisch zueinander angeordnet sind und der inneren Feder eine Justiereinrichtung (33) zur Einstellung eines Betriebspunktes für die Volumenstromsteuerung zugeordnet ist, wozu ein die innere Feder (32) abstützendes Federteller (34) mittels einer Gewindeanordnung axial verstellbar angeordnet ist, sowie mit einem die äußere Feder (30) abstützenden, zweiten Federteller (36) in der Rückstelleinrichtung (14), dadurch gekennzeichnet, daß das erste Federteller (34) als Zahnrad (43) ausgeführt ist, das mit einer von außen verstellbaren Einstellspindel (45) ein erstes Getriebe (46) für die erste Justiereinrichtung bildet und daß das zweite Federteller (36) als zweites Zahnrad (53) ausgeführt und Teil eines zweiten Getriebes (57) ist, das über eine zweite Einstellspindel (56) von außen verstellbar ist.
- Elektrohydraulische Steuereinrichtung nach Anspruch 1, dadurch gekennzeichnet, daß eines der Zahnräder (43) ein Führungsgewinde (52) aufweist, mit dem es im anderen Zahnrad (53) geführt ist.
- Elektrohydraulische Steuereinrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß eines der Zahnräder (53) zwei Führungsgewinde (52, 54) aufweist.
- Elektrohydraulische Steuereinrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Getriebe als Schneckengetriebe (46, 57) ausgeführt sind, von denen jedes ein Zahnrad (43, 53) und eine Schneckenspindel (45, 56) aufweist.
- Elektrohydraulische Steuereinrichtung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß das der äußeren Feder (30) zugeordnete zweite Schneckenrad (53) ein außenliegendes, zweites Führungsgewinde (54) aufweist, mit dem es im Stellgehäuse (42) geführt ist und daß es ein inneres, erstes Führungsgewinde (52) hat, in dem das erste Zahnrad (43) geführt ist.
- Elektrohydraulische Steuereinrichtung nach einem der Ansprüche 4 und 5, dadurch gekennzeichnet, daß die beiden Schneckengetriebe (46, 57) in Achsrichtung des Steuerschiebers gesehen nebeneinander im Stellgehäuse (42) liegen und das äußere Führungsgewinde (54) des zweiten Zahnrades (53) zwischen dem zweiten Schneckengetriebe (57) und dem Steuerschieber (13) angeordnet ist.
- Elektrohydraulische Steuereinrichtung nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß das erste Zahnrad (43) einen hülsenförmigen Ansatz (47) aufweist, der in seinem Inneren die innere Feder (32) aufnimmt und an seinem Außenumfang das erste Führungsgewinde (52) trägt.
- Elektrohydraulische Steuereinrichtung nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß die Abtriebsverzahnungen (44, 55) auf den beiden Zahnrädern (43, 53) im wesentlichen gleiche Durchmesser aufweisen.
- Elektrohydraulische Steuereinrichtung nach einem der Ansprüche 4 bis 8, dadurch gekennzeichnet, daß in beiden Schneckengetrieben (46, 57) die Schneckenspindeln (45, 56) gleich ausgebildet sind.
- Elektrohydraulische Steuereinrichtung nach Anspruch 7, dadurch gekennzeichnet, daß der hülsenförmige Ansatz (47) mit der inneren Feder (32) von einem zentrisch liegenden Stößel (48) durchdrungen ist, über den der angrenzende Magnet (15) mit dem Steuerschieber (13) in Wirkverbindung steht und daß auf diesem Stößel (48) eine Buchse (51) gelagert ist, an der sich die innere Feder (32) abstützt.
- Elektrohydraulische Steuereinrichtung nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, daß die doppeltwirkende Rückstelleinrichtung (40) mit den beiden Getrieben (46, 57) in einem gemeinsamen Stellgehäuse (42) angeordnet sind.
- Elektrohydraulische Steuereinrichtung nach Anspruch 11, dadurch gekennzeichnet, daß das Stellgehäuse (42) eine quaderförmige Form aufweist, daß die beiden Schneckenspindeln (45, 56) in Längsrichtung des Steuerschiebers (13) gesehen, zueinander parallel und diametral zur Schieberachse angeordnet sind und von der gleichen Gehäuseseite (58) aus verstellbar sind.
- Elektrohydraulische Steuereinrichtung nach einem der Ansprüche 1 bis 12, dadurch gekennzeichnet, daß der Magnetantrieb zwei einfach wirkende Magnete (15, 16) aufweist, die beiderseits des Ventilgehäuses (12) angeordnet sind und daß die Rückstelleinrichtung (40) zwischen dem Ventilgehäuse (12) und einem Magnet (15) liegt.
- Elektrohydraulische Steuereinrichtung nach einem der Ansprüche 1 bis 12, dadurch gekennzeichnet, daß der Magnetantrieb ein Doppelhubmagnet ist, der auf einer Seite des Ventilgehäuses (12) angeordnet ist, während auf der anderen Seite die Rückstelleinrichtung (40) liegt.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19913205A DE19913205A1 (de) | 1999-03-24 | 1999-03-24 | Elektrohydraulische Steuereinrichtung |
DE19913205 | 1999-03-24 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1039145A2 EP1039145A2 (de) | 2000-09-27 |
EP1039145A3 EP1039145A3 (de) | 2001-02-28 |
EP1039145B1 true EP1039145B1 (de) | 2004-05-12 |
Family
ID=7902156
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00100019A Expired - Lifetime EP1039145B1 (de) | 1999-03-24 | 2000-01-04 | Elektrohydraulische Steuereinrichtung |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP1039145B1 (de) |
DE (2) | DE19913205A1 (de) |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE7909767L (sv) * | 1978-11-29 | 1980-05-30 | Gresen Manufacturing Co | Elektriskt reglerbar ventil for proportionell legesinstellning |
DE3639174C2 (de) | 1986-11-15 | 1998-02-05 | Bosch Gmbh Robert | Hydraulische Steuereinrichtung |
JPH04231704A (ja) * | 1990-12-28 | 1992-08-20 | Teijin Seiki Co Ltd | 直動型サーボ弁 |
JPH0626502A (ja) * | 1992-07-08 | 1994-02-01 | Kayaba Ind Co Ltd | 電気油圧サーボ弁 |
DE4446143C2 (de) | 1994-12-23 | 2003-04-03 | Bosch Gmbh Robert | Vorrichtung zur Einstellung eines elektromagnetisch betätigten Druckmittelventils |
DE19649833A1 (de) | 1996-12-02 | 1998-06-04 | Bosch Gmbh Robert | Elektrohydraulische Steuervorrichtung |
-
1999
- 1999-03-24 DE DE19913205A patent/DE19913205A1/de not_active Withdrawn
-
2000
- 2000-01-04 EP EP00100019A patent/EP1039145B1/de not_active Expired - Lifetime
- 2000-01-04 DE DE50006372T patent/DE50006372D1/de not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
DE19913205A1 (de) | 2000-09-28 |
EP1039145A2 (de) | 2000-09-27 |
DE50006372D1 (de) | 2004-06-17 |
EP1039145A3 (de) | 2001-02-28 |
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