EP1981745A1 - Solenoid valve - Google Patents

Solenoid valve

Info

Publication number
EP1981745A1
EP1981745A1 EP06830292A EP06830292A EP1981745A1 EP 1981745 A1 EP1981745 A1 EP 1981745A1 EP 06830292 A EP06830292 A EP 06830292A EP 06830292 A EP06830292 A EP 06830292A EP 1981745 A1 EP1981745 A1 EP 1981745A1
Authority
EP
European Patent Office
Prior art keywords
valve
return spring
solenoid valve
centering
centering means
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.)
Withdrawn
Application number
EP06830292A
Other languages
German (de)
French (fr)
Inventor
Harald Speer
Dietmar Kratzer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1981745A1 publication Critical patent/EP1981745A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
    • B60T8/34—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition
    • B60T8/36—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition including a pilot valve responding to an electromagnetic force
    • B60T8/3615—Electromagnetic valves specially adapted for anti-lock brake and traction control systems
    • B60T8/363—Electromagnetic valves specially adapted for anti-lock brake and traction control systems in hydraulic systems
    • 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
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
    • F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
    • F16K31/0644—One-way valve
    • F16K31/0655—Lift valves

Definitions

  • the invention relates to a solenoid valve according to the preamble of independent claim 1.
  • a conventional solenoid valve, in particular for a hydraulic unit, which is used for example in an anti-lock braking system (ABS) or a traction control system (ASR system) or an electronic stability program system (ESP system) is shown in Figure 7.
  • the conventional normally open solenoid valve 100 comprises, in addition to a magnet assembly, not shown, a valve cartridge which comprises a capsule 106, a valve insert 101, a plunger 102, a return spring 103 and an armature 107.
  • the capsule 106 and the valve core 101 of the valve cartridge are joined together by pressing and by a sealing weld 108, the valve cartridge is hydraulically sealed from the atmosphere.
  • valve core 101 receives the pressure forces occurring in the hydraulic system and forwards them via a caulking flange 109 to a caulking region, not shown, on a fluid block.
  • valve core 101 receives the so-called valve body 104, which comprises a valve seat 110, in which the plunger 102 is sealingly immersed to implement the sealing function of the solenoid valve 100.
  • the plunger 102 and the return spring 103 are guided in the valve core 101, wherein the plunger 102 is guided in a plunger guide 111 and the return spring 103 is radially guided and centered at one end on the plunger 102 and the other End axially rests on the valve body 104.
  • the flow path of the fluid through the solenoid valve is shown schematically by an arrow chain 105.
  • the spring force of the return spring 103 acts in the region of the flow forces, which act on the turns of the return spring 103 due to the flow. This can lead to an undesirable influence of the spring behavior by the flow. So it can, for example, to lift the return spring 103 of her Pad on the valve body 104 come, which may be associated with a corresponding (force) effect on the valve stem 102 and an undesirable influence on the valve function.
  • the solenoid valve according to the invention with the features of independent claim 1 has the advantage that centering means are provided, which are arranged in the region of a return spring on a valve core, that the return spring is centered and stabilized. This can be prevented in an advantageous manner that flow forces acting on the turns of the return spring can lead to a lateral breaking of the return spring, or the return spring can lift off a support or the turns of the return spring relative to each other in motion or in vibrations can offset. In particular, centered and stabilized by the centering a only axially fitting to a valve body spring end, without affecting the mountability and adjustability of the solenoid valve negative.
  • the centering means comprise at least one axially extending centering web, which is arranged in an inner bore of the valve core.
  • the return spring can be guided over a longer distance, for example, so that the return spring is advantageously centered and stabilized almost over the entire length.
  • the at least one axial centering web has a guide groove adapted to the diameter of the return spring, the cross-sectional shape of which preferably corresponds to a circular section.
  • the guidance of the centering web can also be described as a secant, i. be executed as a straight section.
  • the centering means can be formed, for example, from the material of the valve core, ie be made in one piece with the valve core.
  • the valve insert with the centering means can be produced, for example, as a turned part or as a cold-formed part.
  • the centering of the valve core for centering the return spring on three axially extending centering webs which preferably have a mean distance of 120 ° to each other.
  • the centering means may have a mounting-correct insertion bevel, whereby the assembly is facilitated.
  • the centering means are arranged, for example, so that a bottom of the centering means always has a distance from the valve body in order to form a stop for the valve body during an assembly process.
  • Figure 1 is a schematic sectional view of a solenoid valve according to the invention
  • Figure 2 is a schematic cross-sectional view taken along a line A-A of Figure 1 to
  • Figure 3 is a schematic perspective view of a second embodiment of the
  • Valve insert, Figure 4 is a schematic plan view of the second embodiment of the valve insert according to
  • Figure 5 is a schematic perspective view of a third embodiment of the
  • Valve insert, Figure 6 is a schematic plan view of the third embodiment of the valve insert according to
  • Fig. 5, and Figure 7 is a schematic sectional view of a conventional solenoid valve.
  • a solenoid valve 20 comprises, in addition to a magnet assembly (not shown), a valve cartridge which comprises a capsule 6, a valve core 1, a plunger 2, a return spring 3 and an armature 7 analogously to the conventional solenoid valve 100 according to FIG.
  • the capsule 6 and the valve core 1 of the valve cartridge are joined together by pressing and by a sealing weld 8, the valve cartridge is hydraulically to the atmosphere sealed.
  • the valve core 1 receives the pressure forces occurring in the hydraulic system and forwards them via a caulking flange 9 to a caulking region (not shown) on a fluid block.
  • valve core 1 receives the so-called valve body 4, which comprises a valve seat 10, in which the plunger 2 is sealingly immersed to implement the sealing function of the solenoid valve 20.
  • the plunger 2 are guided via a plunger guide 11 and the return spring 3 via centering 12 in the valve core 1, wherein the return spring 3, in contrast to the conventional solenoid valve 100 is not only one side on the plunger 2 centered, but by the centering means 12 is centered and stabilized almost over the entire length, so that the other end of the return spring 3 is centered and stabilized, which rests on the valve body 4.
  • the centering means 12 of the valve core 1 for centering the return spring 3 comprise three axially extending centering webs, which are arranged within an inner bore of the valve core 1 and preferably have an average distance of 120 ° to each other, as can be seen from the cross-sectional view of FIG , In order to facilitate the insertion of the return spring 3, the centering webs 12 a mounting-correct insertion bevel 12.2. In addition, the centering webs are arranged in the valve core 1 that a bottom 12.3 of the centering webs 12 have a distance from the valve body 4, so that a stop of the valve body 4 during the assembly process of the solenoid valve 20 is prevented.
  • the axial centering means 12 is prevented in an advantageous manner that it comes through a flow of fluid shown schematically as an arrow chain 5 through the solenoid valve 20 to an undesirable influence of the spring behavior.
  • a lateral breaking of the return spring 3 and / or a lifting of the return spring 3 from the valve body 4 and / or a relative movement or oscillations of the turns of the return spring 3 can be prevented.
  • the three axial centering webs 12 of a first embodiment of the valve core 1 are adapted via a guide groove 12.1 to the diameter of the return spring 3, wherein the guide groove 12.1 has the shape of a circular segment.
  • the guides of the axial centering webs 12 can also be designed as straight sections.
  • the axial Zentrierstege 12 are formed from the material of the valve core 1, for example by a plurality of holes, for example, via a central bore, the return spring 3 is guided and provided by three further holes channels for fluid management.
  • Figures 3 and 4 show a second embodiment of the valve core 1 with three narrow axial Zentrierstegen 12, which are adapted by their dimensions to the diameter of the return spring 3.
  • the second embodiment of the valve core 1 is made, for example, as a cold-formed part, which is machined, if necessary, by machining.
  • Figures 5 and 6 show a third embodiment of the valve core 1 with three axial Zentrierstegen 12, which, analogous to the first embodiment shown in FIG. 2, are adapted via a guide groove 12.1 to the diameter of the return spring 3.
  • the centering webs 12 have a cross-sectional shape which corresponds to a circular ring segment.
  • the third embodiment of the valve core 1 is, for example, hergesellt as a rotating part.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid Mechanics (AREA)
  • Transportation (AREA)
  • Magnetically Actuated Valves (AREA)

Abstract

The invention relates to a solenoid valve having a valve insert (1) and a plunger (2) which is movably guided in the valve insert (1) by means of a plunger guide (11) and which is supported on a valve element (4) by means of a restoring spring (3). According to the invention there are centring means (12) which are arranged on the valve insert (1) in the region of the restoring spring (3) in such a way that the restoring spring (3) is centred and stabilized.

Description

Magnetventilmagnetic valve
Stand der TechnikState of the art
Die Erfindung geht aus von einem Magnetventil nach der Gattung des unabhängigen Patentanspruchs 1.The invention relates to a solenoid valve according to the preamble of independent claim 1.
Ein herkömmliches Magnetventil, insbesondere für ein Hydraulikaggregat, welches beispielsweise in einem Antiblockiersystem (ABS) oder einem Antriebsschlupfregelsystem (ASR-System) oder einem elektronischen Stabilitätsprogrammsystem (ESP-System) eingesetzt wird, ist in Figur 7 dargestellt. Wie aus Figur 7 ersichtlich ist, umfasst das herkömmliche stromlos offene Magnetventil 100 neben einer nicht dargestellten Magnetbaugruppe eine Ventilpatrone, welche eine Kapsel 106, einen Ventileinsatz 101, einen Stößel 102, eine Rückstellfeder 103 und einen Anker 107 umfasst. Bei der Herstellung des Magnetventils 100 werden die Kapsel 106 und der Ventileinsatz 101 der Ventilpatrone durch Pressen aufeinander gefügt und durch eine Dichtschweißung 108 wird die Ventilpatrone hydraulisch gegenüber der Atmosphäre abgedichtet. Zusätzlich nimmt der Ventileinsatz 101 die im hydraulischen System auftretenden Druckkräfte auf und leitet diese über einen Verstemmflansch 109 an einen nicht dargestellten Verstemmbereich auf einem Fluidblock weiter. Zudem nimmt der Ventileinsatz 101 den so genannten Ventilkörper 104 auf, welcher einen Ventilsitz 110 umfasst, in welchen der Stößel 102 dichtend eintaucht, um die Dichtfunktion des Magnetventils 100 umzusetzen. Wie weiter aus Figur 7 ersichtlich ist, werden der Stößel 102 und die Rückstellfeder 103 im Ventileinsatz 101 geführt, wobei der Stößel 102 in einer Stößelführung 111 geführt ist und die Rückstellfeder 103 an einem Ende auf dem Stößel 102 radial geführt und zentriert ist und am anderen Ende auf dem Ventilkörper 104 axial geführt aufliegt. Der Strömungsweg des Fluids durch das Magnetventil ist schematisch durch eine Pfeilkette 105 dargestellt. Somit wirkt die Federkraft der Rückstellfeder 103 im Bereich der Strömungskräfte, welche aufgrund der Strömung auf die Windungen der Rückstellfeder 103 wirken. Dadurch kann es zu einer unerwünschten Beeinflussung des Federverhaltens durch die Strömung kommen. So kann es beispielsweise zum Abheben der Rückstellfeder 103 von ihrer Auflage am Ventilkörper 104 kommen, was mit einer entsprechenden (Kraft-) Wirkung auf den Ventilstößel 102 und einer unerwünschter Beeinflussung der Ventilfunktion verbunden sein kann.A conventional solenoid valve, in particular for a hydraulic unit, which is used for example in an anti-lock braking system (ABS) or a traction control system (ASR system) or an electronic stability program system (ESP system) is shown in Figure 7. As can be seen from FIG. 7, the conventional normally open solenoid valve 100 comprises, in addition to a magnet assembly, not shown, a valve cartridge which comprises a capsule 106, a valve insert 101, a plunger 102, a return spring 103 and an armature 107. In the production of the solenoid valve 100, the capsule 106 and the valve core 101 of the valve cartridge are joined together by pressing and by a sealing weld 108, the valve cartridge is hydraulically sealed from the atmosphere. In addition, the valve core 101 receives the pressure forces occurring in the hydraulic system and forwards them via a caulking flange 109 to a caulking region, not shown, on a fluid block. In addition, the valve core 101 receives the so-called valve body 104, which comprises a valve seat 110, in which the plunger 102 is sealingly immersed to implement the sealing function of the solenoid valve 100. As further shown in Figure 7, the plunger 102 and the return spring 103 are guided in the valve core 101, wherein the plunger 102 is guided in a plunger guide 111 and the return spring 103 is radially guided and centered at one end on the plunger 102 and the other End axially rests on the valve body 104. The flow path of the fluid through the solenoid valve is shown schematically by an arrow chain 105. Thus, the spring force of the return spring 103 acts in the region of the flow forces, which act on the turns of the return spring 103 due to the flow. This can lead to an undesirable influence of the spring behavior by the flow. So it can, for example, to lift the return spring 103 of her Pad on the valve body 104 come, which may be associated with a corresponding (force) effect on the valve stem 102 and an undesirable influence on the valve function.
Vorteile der ErfindungAdvantages of the invention
Das erfindungsgemäße Magnetventil mit den Merkmalen des unabhängigen Patentanspruchs 1 hat demgegenüber den Vorteil, dass Zentriermittel vorhanden sind, welche im Bereich einer Rückstellfeder so an einem Ventileinsatz angeordnet sind, dass die Rückstellfeder zentriert und stabilisiert ist. Dadurch kann in vorteilhafter Weise verhindert werden, dass Strömungskräfte, welche auf die Windungen der Rückstellfeder wirken, zu einem seitlichem Ausbrechen der Rückstellfeder führen können, oder die Rückstellfeder von einer Auflage abheben können bzw. die Windungen der Rückstellfeder relativ zueinander in Bewegung bzw. in Schwingungen versetzen können. Insbesondere wird durch die Zentriermittel ein nur axial an einem Ventilkörper anliegendes Federende zentriert und stabilisiert, ohne die Montierbarkeit und Einstellbarkeit des Magnetventils negativ zu beeinflussen.The solenoid valve according to the invention with the features of independent claim 1 has the advantage that centering means are provided, which are arranged in the region of a return spring on a valve core, that the return spring is centered and stabilized. This can be prevented in an advantageous manner that flow forces acting on the turns of the return spring can lead to a lateral breaking of the return spring, or the return spring can lift off a support or the turns of the return spring relative to each other in motion or in vibrations can offset. In particular, centered and stabilized by the centering a only axially fitting to a valve body spring end, without affecting the mountability and adjustability of the solenoid valve negative.
Durch die in den abhängigen Ansprüchen aufgeführten Maßnahmen und Weiterbildungen sind vorteilhafte Verbesserungen des im unabhängigen Patentanspruch angegebenen Magnetventils möglich.The measures and refinements recited in the dependent claims advantageous improvements of the independent claim solenoid valve are possible.
Besonders vorteilhaft ist, dass die Zentriermittel mindestens einen axial verlaufenden Zentriersteg umfassen, welcher in einer Innenbohrung des Ventileinsatzes angeordnet ist. Durch den mindestens einen Zentriersteg kann die Rückstellfeder beispielsweise über eine längere Strecke geführt werden, so dass die Rückstellfeder in vorteilhafter Weise nahezu über die gesamte Länge zentriert und stabilisiert wird.It is particularly advantageous that the centering means comprise at least one axially extending centering web, which is arranged in an inner bore of the valve core. By way of the at least one centering web, the return spring can be guided over a longer distance, for example, so that the return spring is advantageously centered and stabilized almost over the entire length.
In Ausgestaltung des erfindungsgemäßen Magnetventils weist der mindestens eine axiale Zentriersteg eine an den Durchmesser der Rückstellfeder angepasste Führungsnut auf, deren Querschnittsform vorzugsweise einem Kreisabschnitt entspricht. Alternativ kann die Führung des Zentrierstegs auch als Sekante, d.h. als gerader Abschnitt ausgeführt sein. Durch die an die Rückstellfeder angepasste Form der Führungsnut kann die Führung der Rückstellfeder in vorteilhafter Weise weiter verbessert werden.In an embodiment of the solenoid valve according to the invention, the at least one axial centering web has a guide groove adapted to the diameter of the return spring, the cross-sectional shape of which preferably corresponds to a circular section. Alternatively, the guidance of the centering web can also be described as a secant, i. be executed as a straight section. By adapted to the return spring shape of the guide groove, the leadership of the return spring can be further improved in an advantageous manner.
Die Zentriermittel können beispielsweise aus dem Material des Ventileinsatzes ausgeformt werden, d.h. einstückig mit dem Ventileinsatz ausgeführt werden. Der Ventileinsatz mit den Zentriermitteln ist beispielsweise als Drehteil oder als Kaltschlagteil herstellbar. In weiterer Ausgestaltung des erfindungsgemäßen Magnetventils weisen die Zentriermittel des Ventileinsatzes zur Zentrierung der Rückstellfeder drei axial verlaufende Zentrierstege auf, welche vorzugsweise einen mittleren Abstand von 120° zu einander aufweisen. Die ermöglicht in vorteilhafter Weise eine genauere Zentrierung der Rückstellfeder bei der Montage. Zusätzlich können die Zentriermittel eine montagerechte Einführschräge aufweisen, wodurch die Montage erleichtert wird. Die Zentriermittel sind beispielsweise so angeordnet, dass eine Unterseite der Zentriermittel immer einen Abstand zum Ventilkörper aufweist, um während eines Montageprozesses keinen Anschlag für den Ventilkörper zu bilden.The centering means can be formed, for example, from the material of the valve core, ie be made in one piece with the valve core. The valve insert with the centering means can be produced, for example, as a turned part or as a cold-formed part. In a further embodiment of the solenoid valve according to the invention, the centering of the valve core for centering the return spring on three axially extending centering webs, which preferably have a mean distance of 120 ° to each other. The advantageously allows a more accurate centering of the return spring during assembly. In addition, the centering means may have a mounting-correct insertion bevel, whereby the assembly is facilitated. The centering means are arranged, for example, so that a bottom of the centering means always has a distance from the valve body in order to form a stop for the valve body during an assembly process.
Zeichnungdrawing
Vorteilhafte, nachfolgend beschriebene Ausführungsformen der Erfindung sowie das zu deren besserem Verständnis oben erläuterte, herkömmliche Ausführungsbeispiel sind in den Zeichnungen dargestellt. Es zeigen:Advantageous embodiments of the invention described below as well as the conventional embodiment explained above for better understanding thereof are shown in the drawings. Show it:
Figur 1 eine schematische Schnittdarstellung eines erfindungsgemäßen Magnetventils, Figur 2 eine schematische Querschnittdarstellung entlang einer Linie A-A aus Figur 1 zurFigure 1 is a schematic sectional view of a solenoid valve according to the invention, Figure 2 is a schematic cross-sectional view taken along a line A-A of Figure 1 to
Darstellung einer ersten Ausführungsform eines Ventileinsatzes, Figur 3 eine schematische perspektivische Darstellung einer zweiten Ausführungsform desRepresentation of a first embodiment of a valve core, Figure 3 is a schematic perspective view of a second embodiment of the
Ventileinsatzes, Figur 4 eine schematische Draufsicht auf die zweite Ausführungsform des Ventileinsatzes gemäßValve insert, Figure 4 is a schematic plan view of the second embodiment of the valve insert according to
Fig. 3, Figur 5 eine schematische perspektivische Darstellung einer dritten Ausführungsform desFig. 3, Figure 5 is a schematic perspective view of a third embodiment of the
Ventileinsatzes, Figur 6 eine schematische Draufsicht auf die dritte Ausführungsform des Ventileinsatzes gemäßValve insert, Figure 6 is a schematic plan view of the third embodiment of the valve insert according to
Fig. 5, und Figur 7 eine schematische Schnittdarstellung eines herkömmlichen Magnetventils.Fig. 5, and Figure 7 is a schematic sectional view of a conventional solenoid valve.
Beschreibungdescription
Wie aus Figur 1 ersichtlich ist, umfasst ein erfindungsgemäßes Magnetventil 20 neben einer nicht dargestellten Magnetbaugruppe eine Ventilpatrone, welche analog zum herkömmlichen Magnetventil 100 gemäß Figur 7 eine Kapsel 6, einen Ventileinsatz 1 , einen Stößel 2, eine Rückstellfeder 3 und einen Anker 7 umfasst. Bei der Herstellung des Magnetventils 20 werden die Kapsel 6 und der Ventileinsatz 1 der Ventilpatrone durch Pressen aufeinander gefügt und durch eine Dichtschweißung 8 wird die Ventilpatrone hydraulisch gegenüber der Atmosphäre abgedichtet. Zusätzlich nimmt der Ventileinsatz 1 die im hydraulischen System auftretenden Druckkräfte auf und leitet diese über einen Verstemmflansch 9 an einen nicht dargestellten Verstemmbereich auf einem Fluidblock weiter. Zudem nimmt der Ventileinsatz 1 den so genannten Ventilkörper 4 auf, welcher einen Ventilsitz 10 umfasst, in welchen der Stößel 2 dichtend eintaucht, um die Dichtfunktion des Magnetventils 20 umzusetzen. Wie weiter aus Figur 1 ersichtlich ist, werden der Stößel 2 über eine Stößelführung 11 und die Rückstellfeder 3 über Zentriermittel 12 im Ventileinsatz 1 geführt, wobei die Rückstellfeder 3 im Gegensatz zum herkömmlichen Magnetventil 100 nicht nur einseitig auf dem Stößel 2 zentriert ist, sondern durch die Zentriermittel 12 nahezu über die gesamte Länge zentriert und stabilisiert wird, so dass auch das andere Ende der Rückstellfeder 3 zentriert und stabilisiert ist, welches auf dem Ventilkörper 4 aufliegt. Im dargestellten Ausführungsbeispiel umfassen die Zentriermittel 12 des Ventileinsatzes 1 zur Zentrierung der Rückstellfeder 3 drei axial verlaufende Zentrierstege, welche innerhalb einer Innenbohrung des Ventileinsatzes 1 angeordnet sind und vorzugsweise einen mittleren Abstand von 120° zu einander aufweisen, wie aus der Querschnittdarstellung gemäß Figur 2 ersichtlich ist. Um das Einführen der Rückstellfeder 3 zu erleichtern weisen die Zentrierstege 12 eine montagerechte Einführschräge 12.2 auf. Zudem sind die Zentrierstege so im Ventileinsatz 1 angeordnet, dass eine Unterseite 12.3 der Zentrierstege 12 einen Abstand zum Ventilkörper 4 aufweisen, so dass ein Anschlag des Ventilkörpers 4 während des Montageprozesses des Magnetventils 20 verhindert wird.As can be seen from FIG. 1, a solenoid valve 20 according to the invention comprises, in addition to a magnet assembly (not shown), a valve cartridge which comprises a capsule 6, a valve core 1, a plunger 2, a return spring 3 and an armature 7 analogously to the conventional solenoid valve 100 according to FIG. In the manufacture of the solenoid valve 20, the capsule 6 and the valve core 1 of the valve cartridge are joined together by pressing and by a sealing weld 8, the valve cartridge is hydraulically to the atmosphere sealed. In addition, the valve core 1 receives the pressure forces occurring in the hydraulic system and forwards them via a caulking flange 9 to a caulking region (not shown) on a fluid block. In addition, the valve core 1 receives the so-called valve body 4, which comprises a valve seat 10, in which the plunger 2 is sealingly immersed to implement the sealing function of the solenoid valve 20. As further seen in Figure 1, the plunger 2 are guided via a plunger guide 11 and the return spring 3 via centering 12 in the valve core 1, wherein the return spring 3, in contrast to the conventional solenoid valve 100 is not only one side on the plunger 2 centered, but by the centering means 12 is centered and stabilized almost over the entire length, so that the other end of the return spring 3 is centered and stabilized, which rests on the valve body 4. In the illustrated embodiment, the centering means 12 of the valve core 1 for centering the return spring 3 comprise three axially extending centering webs, which are arranged within an inner bore of the valve core 1 and preferably have an average distance of 120 ° to each other, as can be seen from the cross-sectional view of FIG , In order to facilitate the insertion of the return spring 3, the centering webs 12 a mounting-correct insertion bevel 12.2. In addition, the centering webs are arranged in the valve core 1 that a bottom 12.3 of the centering webs 12 have a distance from the valve body 4, so that a stop of the valve body 4 during the assembly process of the solenoid valve 20 is prevented.
Durch die axialen Zentriermittel 12 wird in vorteilhafter Weise verhindert, dass es durch eine schematisch als Pfeilkette 5 dargestellte Strömung eines Fluids durch das Magnetventil 20 zu einer unerwünschten Beeinflussung des Federverhaltens kommt. So kann beispielsweise ein seitliches Ausbrechen der Rückstellfeder 3 und/oder ein Abheben der Rückstellfeder 3 vom Ventilkörper 4 und/oder eine Relativbewegung bzw. Schwingungen der Windungen der Rückstellfeder 3 verhindert werden.By the axial centering means 12 is prevented in an advantageous manner that it comes through a flow of fluid shown schematically as an arrow chain 5 through the solenoid valve 20 to an undesirable influence of the spring behavior. Thus, for example, a lateral breaking of the return spring 3 and / or a lifting of the return spring 3 from the valve body 4 and / or a relative movement or oscillations of the turns of the return spring 3 can be prevented.
Nachfolgend werden unter Bezugnahme auf die Figuren 2 bis 6 verschiedene Ausführungsformen des Ventileinsatzes 1 beschrieben. Wie aus Fig. 2 ersichtlich ist, sind die drei axialen Zentrierstege 12 einer ersten Ausführungsform des Ventileinsatzes 1 über eine Führungsnut 12.1 an den Durchmesser der Rückstellfeder 3 angepasst, wobei die Führungsnut 12.1 die Form eines Kreisabschnitts aufweist. Alternativ können die Führungen der axialen Zentrierstege 12 auch als gerade Abschnitte ausgeführt werden. Wie weiter aus Figur 2 ersichtlich ist, sind die axialen Zentrierstege 12 aus dem Material des Ventileinsatz 1 ausgeformt, beispielsweise durch mehrere Bohrungen, wobei beispielsweise über eine mittlere Bohrung die Rückstellfeder 3 geführt ist und durch drei weitere Bohrungen Kanäle zur Fluidführung zur Verfügung gestellt werden. Figur 3 und 4 zeigen eine zweite Ausfuhrungsform des Ventileinsatzes 1 mit drei schmalen axialen Zentrierstegen 12, welche durch ihre Abmessungen an den Durchmesser der Rückstellfeder 3 angepasst sind. Die zweite Ausführungsform des Ventileinsatzes 1 wird beispielsweise als Kaltschlagteil hergestellt, welches bei Bedarf spangebend nachbearbeitet wird..Hereinafter, various embodiments of the valve core 1 will be described with reference to FIGS. As can be seen from FIG. 2, the three axial centering webs 12 of a first embodiment of the valve core 1 are adapted via a guide groove 12.1 to the diameter of the return spring 3, wherein the guide groove 12.1 has the shape of a circular segment. Alternatively, the guides of the axial centering webs 12 can also be designed as straight sections. As further seen in Figure 2, the axial Zentrierstege 12 are formed from the material of the valve core 1, for example by a plurality of holes, for example, via a central bore, the return spring 3 is guided and provided by three further holes channels for fluid management. Figures 3 and 4 show a second embodiment of the valve core 1 with three narrow axial Zentrierstegen 12, which are adapted by their dimensions to the diameter of the return spring 3. The second embodiment of the valve core 1 is made, for example, as a cold-formed part, which is machined, if necessary, by machining.
Figur 5 und 6 zeigen eine dritte Ausführungsform des Ventileinsatzes 1 mit drei axialen Zentrierstegen 12, welche, analog zur ersten Ausführungsform gemäß Fig. 2, über eine Führungsnut 12.1 an den Durchmesser der Rückstellfeder 3 angepasst sind. Die Zentrierstege 12 weisen eine Querschnittsform auf, die einem Kreisringsegment entspricht. Die dritte Ausführungsform des Ventileinsatzes 1 wird beispielsweise als Drehteil hergesellt. Figures 5 and 6 show a third embodiment of the valve core 1 with three axial Zentrierstegen 12, which, analogous to the first embodiment shown in FIG. 2, are adapted via a guide groove 12.1 to the diameter of the return spring 3. The centering webs 12 have a cross-sectional shape which corresponds to a circular ring segment. The third embodiment of the valve core 1 is, for example, hergesellt as a rotating part.

Claims

01.12.06ROBERT BOSCH GMBH, 70442 StuttgartAnsprüche 01.12.06ROBERT BOSCH GMBH, 70442 Stuttgart claims
1. Magnetventil mit einem Ventileinsatz (1) und einem über eine Stößelführung (11) im Ventileinsatz (1) beweglich geführten Stößel (2), welcher sich über eine Rückstellfeder (3) auf einem Ventilkörper (4) abstützt, gekennzeichnet durch Zentriermittel (12), welche im Bereich der Rückstellfeder (3) so am Ventileinsatz (1) angeordnet sind, dass die Rückstellfeder (3) zentriert und stabilisiert ist.1. Solenoid valve with a valve insert (1) and a via a tappet guide (11) in the valve insert (1) movably guided plunger (2), which is supported by a return spring (3) on a valve body (4), characterized by centering means (12 ), which are arranged in the region of the return spring (3) on the valve core (1), that the return spring (3) is centered and stabilized.
2. Magnetventil nach Anspruch 1, dadurch gekennzeichnet, dass die Zentriermittel (12) mindestens einen axial verlaufenden Zentriersteg umfassen, welcher in einer Innenbohrung des Ventileinsatz (1) angeordnet ist.2. Solenoid valve according to claim 1, characterized in that the centering means (12) comprise at least one axially extending centering web, which is arranged in an inner bore of the valve core (1).
3. Magnetventil nach Anspruch 2, dadurch gekennzeichnet, dass der mindestens eine axiale Zentriersteg (12) eine an den Durchmesser der Rückstellfeder (3) angepasste Führungsnut (12.1) aufweist, deren Form vorzugsweise einem Kreisabschnitt entspricht.3. Solenoid valve according to claim 2, characterized in that the at least one axial centering web (12) has a to the diameter of the return spring (3) adapted guide groove (12.1), whose shape preferably corresponds to a circular section.
4. Magnetventil nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Zentriermittel (12) aus dem Material des Ventileinsatz (1) ausgeformt sind.4. Solenoid valve according to one of claims 1 to 3, characterized in that the centering means (12) are formed from the material of the valve core (1).
5. Magnetventil nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass der Ventileinsatz (1) mit den Zentriermitteln (12) als Drehteil herstellbar ist.5. Solenoid valve according to one of claims 1 to 4, characterized in that the valve insert (1) with the centering means (12) can be produced as a rotating part.
6. Magnetventil nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass der Ventileinsatz (1) mit den Zentriermitteln (12) als Kaltschlagteil herstellbar ist.6. Solenoid valve according to one of claims 1 to 5, characterized in that the valve insert (1) with the centering means (12) can be produced as a cold-formed part.
7. Magnetventil nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass die Zentriermittel (12) des Ventileinsatzes (1) zur Zentrierung der Rückstellfeder (3) drei axial verlaufende Zentrierstege umfassen, welche vorzugsweise einen mittleren Abstand von 120° zu einander aufweisen. Magnetventil nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass die Zentriermittel (12) eine montagerechte Einführschräge (12.2) aufweisen, wobei jeweils eine Unterseite (12.3) der Zentriermittel (12) einen Abstand zum Ventilkörper (4) aufweist. 7. Solenoid valve according to one of claims 1 to 6, characterized in that the centering means (12) of the valve core (1) for centering the return spring (3) comprise three axially extending centering webs, which preferably have an average distance of 120 ° to each other. Solenoid valve according to one of claims 1 to 7, characterized in that the centering means (12) have an assembly-oriented insertion bevel (12.2), wherein each have a bottom (12.3) of the centering means (12) at a distance from the valve body (4).
EP06830292A 2006-01-27 2006-12-01 Solenoid valve Withdrawn EP1981745A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006003857A DE102006003857A1 (en) 2006-01-27 2006-01-27 Magnetic valve, e.g. for a hydraulic unit in an antilock braking system (ABS), an acceleration slip regulation (ASR) or an electronic stability system (ESP), has a valve core and needle
PCT/EP2006/069226 WO2007085316A1 (en) 2006-01-27 2006-12-01 Solenoid valve

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EP1981745A1 true EP1981745A1 (en) 2008-10-22

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US (1) US20090008587A1 (en)
EP (1) EP1981745A1 (en)
CN (1) CN101336186A (en)
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WO (1) WO2007085316A1 (en)

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CN101336186A (en) 2008-12-31
DE102006003857A1 (en) 2007-08-02

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