EP0568866B1 - Magnet system for needle selection in textile machines - Google Patents

Magnet system for needle selection in textile machines Download PDF

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Publication number
EP0568866B1
EP0568866B1 EP93106516A EP93106516A EP0568866B1 EP 0568866 B1 EP0568866 B1 EP 0568866B1 EP 93106516 A EP93106516 A EP 93106516A EP 93106516 A EP93106516 A EP 93106516A EP 0568866 B1 EP0568866 B1 EP 0568866B1
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EP
European Patent Office
Prior art keywords
magnet
magnet system
armature part
core
flux
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
Application number
EP93106516A
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German (de)
French (fr)
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EP0568866A1 (en
Inventor
Dietmar Dipl.-Kaufm. Harting
Wilhelm Gosewehr
Ernst-Heinrich Dipl.-Ing. Harting
Wolfgang Dipl.-Ing. Neuhaus
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Harting Stiftung and Co KG
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Harting AG and Co KG
Harting Electronics GmbH and Co KG
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Publication of EP0568866A1 publication Critical patent/EP0568866A1/en
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Publication of EP0568866B1 publication Critical patent/EP0568866B1/en
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    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B15/00—Details of, or auxiliary devices incorporated in, weft knitting machines, restricted to machines of this kind
    • D04B15/66—Devices for determining or controlling patterns ; Programme-control arrangements
    • D04B15/68—Devices for determining or controlling patterns ; Programme-control arrangements characterised by the knitting instruments used
    • D04B15/78—Electrical devices

Definitions

  • the invention relates to a magnet system for needle selection in textile machines, in particular a bistable magnet system.
  • magnet systems it is necessary to build them as small and compact as possible so that they can be arranged in a tight space, packed tightly together.
  • Such a magnet system has become known from DE-OS 29 38 851.
  • Individual, self-contained electromagnetic systems are built into a permanent magnet joint yoke.
  • the electromagnet systems are each provided with an inner armature that can be tilted between two positions, one end of which rests as a bearing point on the base of the magnet system.
  • the invention is based on the object of designing a magnet system of the type mentioned in such a way that it is as small-volume as possible and for a space-saving close-by-close arrangement of several Magnet systems is formed and on the other hand has a robust armature with reliable storage.
  • This object is achieved in that the direction of polarization extends transversely to the end face or to the axis of the magnetic core, and in that a flux guide plate is provided on both sides of the magnetic core, which extends from the end of the magnetic core to which it is connected in a highly conductive manner, at least over the Extends the area of the permanent magnet in the armature part.
  • the magnet system consists essentially of an elongated magnetic core 2, which is inserted into a coil body 4 carrying an excitation winding 3.
  • the anchor part 1 is rotatably mounted about the axis 6.
  • the anchor part is made of magnetically non-conductive material, preferably of plastic material.
  • a permanent magnet 7 is inserted into the armature part, the direction of polarization of which runs in the direction of movement of the armature part, ie transverse to the end of the core.
  • Flux baffles 8, 8 ' are arranged on both sides of the coil former with the excitation winding and the magnetic core and are connected to the lower end 9 of the core in a magnetically good manner.
  • the lower end of the core is correspondingly widened.
  • the flow baffles extend at least into the area in which is the permanent magnet 7 of the armature part 1. If the strength of the entire structure requires it, the flow baffles can possibly also be continued beyond this area.
  • a magnetic flux, which exerts a rotational force on the armature part runs over the flux guide plates and the magnetic core, namely the armature part is first moved to the side to which the permanent magnet is located most directly.
  • FIG. 2 shows a magnet system with a modified coil body 4 'in section, FIG. 3 also showing a bottom view and FIG. 4 showing a side view of the magnet system.
  • the coil body is designed as a carrier body made of plastic material and provided with an axial recess 12 into which the magnetic core 2 is inserted.
  • a circumferential recess 13 in the lower region of the carrier body is provided for receiving the excitation winding 3.
  • a pin-like projection 14 is formed as a bearing pin for the anchor part 1.
  • the coil or carrier body is provided with lateral projections / recesses that a enable tight, space-saving joining of several magnet systems.
  • the molding 14 provided as a bearing pin for the anchor part engages in a recess 15 in the neighboring system and thereby ensures that the neighboring systems are held securely.
  • Upper and lower flux guide plates 8 are used to conduct the magnetic flux and to further hold the magnet systems together.
  • FIG. 5 shows the basic structure of the magnet system in an exploded perspective drawing.
  • a lower mounting plate 16 acting as a flux guide plate, is provided, on which the coil former 4 or 4 ′ with the magnetic core 2 is mounted.
  • a guide element 18 for guiding the needle selection tappets 19, which act on the front end 10 of the anchor parts, is arranged between them.
  • FIG. 6 a modified magnet system is shown in FIG. 6, which functions in the same way as the magnet system described above.
  • This magnet system also has a coil former 4 and an armature part 1 rotatably mounted in front of it.
  • Upper and lower flux guide plates 8, 8 ' serve to conduct the magnetic flux.
  • the magnetic core 2 'of the magnet system is made in one piece from the material of the flux guide plate 8'.
  • a tongue 20 is punched out of the flux guide plate 8 ', which is then bent towards the upper flux guide plate 8 and then over a part of its length - magnetically good conductivity - parallel to upper flow baffle runs.
  • a back bend of the tongue and a corresponding bend is designed so that the front end of the tongue extends parallel to the middle between the two flow baffles. This end of the tongue then forms the actual core of the magnet system, the coil body 4 being pushed onto this "magnetic core".
  • the further modified magnet system shown in FIG. 7 essentially consists of a U-shaped magnetic core 21 with an excitation winding 3 on one of the two legs and a rotatably mounted, essentially elongated armature part 1.
  • the axis of rotation 6 of the armature part is present the opening of the U-shaped magnetic core, and the end 22 protrudes between the leg ends 23 of the magnetic core.
  • the armature part is made of non-magnetic material, preferably plastic material, and two front magnets 22 are inserted into its front end 22, the polarization direction of which extends transversely to the magnetic core end, ie in the direction of the connecting line between the two leg ends 23.
  • the two permanent magnets can be packed tightly on top of one another or inserted with an intermediate layer 25 made of non-magnetic material into the end of the armature part. If necessary. can also be provided that a one-piece permanent magnet is used, which was magnetized during the manufacturing process so that there are poles of the same name on its two end faces.
  • a Hall probe 26 or an induction coil or similar stroke position detection means are arranged between the leg ends.
  • FIG. 7 also shows how a plurality of magnet systems can be arranged close to one another. To achieve the greatest possible packing density, it is provided that the leg provided with the excitation winding 3 is straight and the associated second leg has an offset, the offset corresponding approximately to the radius of the excitation coil, so that the systems can be nested.
  • FIGS. 8A, 8B and 9 different possibilities for the formation of the armature part end 22 with the corresponding permanent magnets 24 are shown.
  • the permanent magnets in FIGS. 8A, 8B are ring-shaped and magnetized over their thickness, while in FIG. 9 two diametrically magnetized magnetic rings are provided, which are inserted next to one another in the end of the armature part and the position of which relative to one another is set by rotation during the manufacturing process of the armature part will, and then be fixed.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Machines (AREA)
  • Electromagnets (AREA)

Description

Die Erfindung betrifft ein Magnetsystem für die Nadelauswahl in Textilmaschinen, insbesondere ein bistabiles Magnetsystem.
Bei derartigen Magnetsystemen ist es erforderlich, diese möglichst klein und kompakt aufzubauen, damit sie auf engstem Raum, dicht bei dicht gepackt, angeordnet werden können.The invention relates to a magnet system for needle selection in textile machines, in particular a bistable magnet system.
With such magnet systems, it is necessary to build them as small and compact as possible so that they can be arranged in a tight space, packed tightly together.

Ein derartiges Magnetsystem ist aus der DE-OS 29 38 851 bekanntgeworden. Dabei sind einzelne, in sich selbständige Elektromagnetsysteme in ein Permanentmagnet-Gemeinschaftsjoch eingebaut. Die Elektromagnetsysteme sind jeweils mit einem zwischen zwei Positionen kippbaren, inneren Anker versehen, dessen eines Ende als Lagerstelle auf dem Grunde des Magnetsystems aufliegt.Such a magnet system has become known from DE-OS 29 38 851. Individual, self-contained electromagnetic systems are built into a permanent magnet joint yoke. The electromagnet systems are each provided with an inner armature that can be tilted between two positions, one end of which rests as a bearing point on the base of the magnet system.

Diese im großen und ganzen zufriedenstellende Anordnung ist jedoch störanfällig im Hinblick auf die Lagerstelle des Ankers. Insbesondere treten dabei Probleme durch die äußeren auf den Anker und dessen Lagerstelle wirkenden Kräfte beim Betrieb des Magnetsystemes auf. Da der Anker bei dem bekannten System sehr schlank ausgebildet sein muß, besteht die Gefahr des Brechens, und es ist schwierig bzw. kostspielig, die notwendige Festigkeit des Ankers konstruktiv zu erreichen.However, this generally satisfactory arrangement is prone to failure with respect to the bearing location of the anchor. In particular, problems arise during the operation of the magnet system due to the external forces acting on the armature and its bearing point. Since the anchor in the known system must be very slim, there is a risk of breakage and it is difficult or expensive to achieve the necessary strength of the anchor constructively.

Der Erfindung liegt nunmehr die Aufgabe zugrunde, ein Magnetsystem der eingangs genannten Art dahingehend auszubilden, daß es zum einen möglichst kleinvolumig und für eine platzsparende Dicht-bei-dicht-Anordnung mehrerer Magnetsysteme ausgebildet ist und zum anderen einen robusten Anker mit einer zuverlässigen Lagerung aufweist.The invention is based on the object of designing a magnet system of the type mentioned in such a way that it is as small-volume as possible and for a space-saving close-by-close arrangement of several Magnet systems is formed and on the other hand has a robust armature with reliable storage.

Diese Aufgabe wird dadurch gelöst, daß die Polarisierungsrichtung quer zur Stirnfläche bzw. zur Magnetkernachse verläuft, und daß zu beiden Seiten des Magnetkernes ein Flußleitblech vorgesehen ist, das sich vom Ende des Magnetkernes, mit dem es magnetisch gut leitend verbunden ist, bis mindestens über den Bereich des Permanentmagneten im Ankerteil erstreckt.This object is achieved in that the direction of polarization extends transversely to the end face or to the axis of the magnetic core, and in that a flux guide plate is provided on both sides of the magnetic core, which extends from the end of the magnetic core to which it is connected in a highly conductive manner, at least over the Extends the area of the permanent magnet in the armature part.

Weitere vorteilhafte Ausgestaltungen der Erfindung sind in den Ansprüchen 2 bis 11 angegeben.
Die mit der Erfindung erzielten Vorteile bestehen insbesondere darin, daß das Magnetsystem äußerst kleinvolumig und kompakt aufgebaut ist und dabei eine präzise und auch im Dauerbetrieb mit einer Vielzahl von Lastwechseln standfeste/haltbare Ankerlagerung aufweist. Dabei ist das Magnetsystem aus wenigen, unkritisch zu montierenden Einzelteilen aufgebaut und somit kostengünstig herstellbar.Further advantageous embodiments of the invention are specified in claims 2 to 11.
The advantages achieved by the invention consist in particular in the fact that the magnet system is of extremely small volume and compact and has a precise armature bearing that is stable and durable even with continuous use with a large number of load changes. The magnet system is made up of a few, uncritically assembled individual parts and is therefore inexpensive to manufacture.

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und wird im folgenden näher erläutert.
Es zeigen

Fig. 1A, 1B
die Ansichten eines Magnetsystemes,
Fig. 2
die Ansicht eines Magnetsystemes im Schnitt,
Fig. 3
die Unteransicht des Magnetsystemes gem. Fig. 2,
Fig. 4
die Seitenansicht des Magnetsystemes gem. Fig. 2,
Fig. 5
eine perspektivische Ansicht des Aufbaus eines Magnetsystemes,
Fig. 6
die perspektivische Ansicht eines modifizierten Magnetsystemes,
Fig. 7
die Ansicht von mehreren nebeneinander angeordneten und weiterhin modifizierten Magnetsystemen, und
Fig. 8A, 8B und 9
die Ansichten von Ankerteilen des Magnet- systemes gem. Fig. 7.
An embodiment of the invention is shown in the drawing and is explained in more detail below.
Show it
1A, 1B
the views of a magnet system,
Fig. 2
the view of a magnet system in section,
Fig. 3
the bottom view of the magnet system acc. Fig. 2,
Fig. 4
the side view of the magnet system acc. Fig. 2,
Fig. 5
a perspective view of the structure of a magnet system,
Fig. 6
the perspective view of a modified magnet system,
Fig. 7
the view of several magnet systems arranged side by side and further modified, and
8A, 8B and 9
the views of anchor parts of the magnet system acc. Fig. 7.

In den Fig. 1A und 1B ist ein bistabiles Magnetsystem für die Nadelauswahl in Textilmaschinen mit seinen zwei stabilen Stellungen des Ankerteils 1 dargestellt. Das Magnetsystem besteht im wesentlichen aus einem länglichen Magnetkern 2, der in einem eine Erregerwicklung 3 tragenden Spulenkörper 4 eingeschoben ist. Vor der Stirnseite 5 des Kernes ist das Ankerteil 1 um die Achse 6 drehbar gelagert.
Das Ankerteil ist aus magnetisch nicht leitendem Material, vorzugsweise aus Kunststoffmaterial, hergestellt. In das der Stirnseite des Magnetkernes zugewandte Ende des Ankerteiles ist ein Permanentmagnet 7 in das Ankerteil eingesetzt, dessen Polarisierungsrichtung in Bewegungsrichtung des Ankerteiles, d. h. quer zum Stirnende des Kernes verläuft.
Beidseitig des Spulenkörpers mit der Erregerwicklung und dem Magnetkern sind Flußleitbleche 8, 8' angeordnet, die mit dem unteren Ende 9 des Kernes magnetisch gut leitend verbunden sind. Hierzu ist das untere Ende des Kernes entsprechend verbreitert ausgebildet. Die Flußleitbleche erstrecken sich dabei mindestens bis in den Bereich, in dem sich der Permanentmagnet 7 des Ankerteils 1 befindet. Falls es die Festigkeit des gesamten Aufbaues erfordert, können die Flußleitbleche ggfs. auch über diesen Bereich hinaus fortgeführt sein.
Über die Flußleitbleche und den Magnetkern läuft dabei ein magnetischer Fluß, der eine Drehkraft auf das Ankerteil ausübt, und zwar wird das Ankerteil zunächst zu der Seite hin bewegt, zu der der Permanentmagnet sich am direktesten befindet.
Bei der Bestromung der Erregerwicklung mit einem entsprechend gerichteten Strom (Impuls) wird eine der Permanentkraft entgegengerichtete Kraft auf das Ankerteil ausgeübt und dieses in die andere Lage bewegt. Um die an sich stabilen Endlagen des Ankerteiles zu verstärken, um ein "Umkippen" des Ankerteiles bei starken Erschütterungen des gesamten Systems im Betrieb zu verhindern, kann vorgesehen sein, die Erregerwicklung mit einem entsprechend gerichteten Haltestrom zu betreiben. Auf das obere Ende 10 des Ankerteiles 1, das, wie vorstehend erläutert, zwei stabile Lagen einnehmenkann, wirkt ein hier nicht näher dargestellter Stößel zur Nadelauswahl ein, der bei der in der Fig. 1A gezeigten Stellung des Ankerteiles in den Freiraum 11 eintauchen kann und bei der in der Fig. 1B gezeigten Stellung des Ankerteiles durch dieses am Eintauchen in den Freiraum gehindert wird.1A and 1B show a bistable magnet system for needle selection in textile machines with its two stable positions of the armature part 1. The magnet system consists essentially of an elongated magnetic core 2, which is inserted into a coil body 4 carrying an excitation winding 3. In front of the end face 5 of the core, the anchor part 1 is rotatably mounted about the axis 6.
The anchor part is made of magnetically non-conductive material, preferably of plastic material. In the end of the armature part facing the end of the magnetic core, a permanent magnet 7 is inserted into the armature part, the direction of polarization of which runs in the direction of movement of the armature part, ie transverse to the end of the core.
Flux baffles 8, 8 'are arranged on both sides of the coil former with the excitation winding and the magnetic core and are connected to the lower end 9 of the core in a magnetically good manner. For this purpose, the lower end of the core is correspondingly widened. The flow baffles extend at least into the area in which is the permanent magnet 7 of the armature part 1. If the strength of the entire structure requires it, the flow baffles can possibly also be continued beyond this area.
A magnetic flux, which exerts a rotational force on the armature part, runs over the flux guide plates and the magnetic core, namely the armature part is first moved to the side to which the permanent magnet is located most directly.
When the excitation winding is energized with a correspondingly directed current (pulse), a force opposing the permanent force is exerted on the armature part and this is moved into the other position. In order to reinforce the end positions of the armature part, which are stable per se, in order to prevent the armature part from “tipping over” when the entire system is strongly shaken during operation, provision can be made to operate the excitation winding with a correspondingly directed holding current. On the upper end 10 of the anchor part 1, which, as explained above, can take two stable positions, acts a plunger for needle selection, not shown here, which can plunge into the free space 11 when the anchor part is shown in FIG. 1A and in the position of the anchor part shown in FIG. 1B, this prevents it from being immersed in the free space.

In der Fig. 2 ist ein Magnetsystem mit einem modifizierten Spulenkörper 4' im Schnitt dargestellt, wobei die Fig. 3 noch eine Unteransicht und die Fig. 4 noch eine Seitenansicht des Magnetsystems zeigt. Dabei ist der Spulenkörper als Trägerkörper aus Kunststoffmaterial ausgebildet und mit einer axialen Ausnehmung 12 versehen, in die der Magnetkern 2 eingeschoben ist. Eine umlaufende Aussparung 13 im unteren Bereich des Trägerkörpers ist zur Aufnahme der Erregerwicklung 3 vorgesehen. Im vorderen Bereich des Trägerkörpers ist eine zapfenartige Anformung 14 als Lagerzapfen für das Ankerteil 1 ausgebildet. Der Spulen- bzw. Trägerkörper ist dabei mit seitlichen Anformungen/Ausnehmungen versehen, die ein dichtes, platzsparendes Aneinanderfügen von mehreren Magnetsystemen ermöglichen. Beispielsweise greift die als Lagerzapfen für das Ankerteil vorgesehene Anformung 14 in eine Ausnehmung 15 des Nachbarsystems ein und gewährleistet dabei einen sicheren Halt der benachbarten Systeme. Obere und untere Flußleitbleche 8 dienen zur Leitung des Magnetflusses sowie zum weiteren Zusammenhalt der Magnetsysteme.2 shows a magnet system with a modified coil body 4 'in section, FIG. 3 also showing a bottom view and FIG. 4 showing a side view of the magnet system. The coil body is designed as a carrier body made of plastic material and provided with an axial recess 12 into which the magnetic core 2 is inserted. A circumferential recess 13 in the lower region of the carrier body is provided for receiving the excitation winding 3. In the front area of the carrier body, a pin-like projection 14 is formed as a bearing pin for the anchor part 1. The coil or carrier body is provided with lateral projections / recesses that a enable tight, space-saving joining of several magnet systems. For example, the molding 14 provided as a bearing pin for the anchor part engages in a recess 15 in the neighboring system and thereby ensures that the neighboring systems are held securely. Upper and lower flux guide plates 8 are used to conduct the magnetic flux and to further hold the magnet systems together.

In der Fig. 5 ist der prinzipielle Aufbau des Magnetsystems in einer auseinandergezogenen perspektivischen Zeichnung dargestellt. Dabei ist ein als Flußleitblech wirkendes unteres Montageblech 16 vorgesehen, auf dem der Spulenkörper 4 bzw. 4' mit dem Magnetkern 2 montiert ist. Vor der Stirnseite 5 des Magnetkerns befindet sich das um eine Achse 6 schwenkbare Ankerteil 1 mit dem Permanentmagneten 7. Auf diese Anordnung ist schließlich das obere Flußleit- bzw. Montageblech 17, das hier nur teilweise dargestellt ist, aufgesetzt. Am vorderen Ende der Montagebleche ist zwischen diesen ein Führungselement 18 zur Führung der Nadelauswahlstößel 19, die auf das vordere Ende 10 der Ankerteile einwirken, angeordnet.5 shows the basic structure of the magnet system in an exploded perspective drawing. In this case, a lower mounting plate 16, acting as a flux guide plate, is provided, on which the coil former 4 or 4 ′ with the magnetic core 2 is mounted. In front of the end face 5 of the magnetic core is the armature part 1 with the permanent magnet 7, which can be pivoted about an axis 6. Finally, the upper flux guide or mounting plate 17, which is only partially shown here, is placed on this arrangement. At the front end of the mounting plates, a guide element 18 for guiding the needle selection tappets 19, which act on the front end 10 of the anchor parts, is arranged between them.

Schließlich ist in der Fig. 6 ein modifiziertes Magnetsystem dargestellt, das von der Funktionsweise her wie das vorstehend beschriebene Magnetsystem ausgebildet ist. Auch dieses Magnetsystem weist einen Spulenkörper 4 sowie ein davor drehbar gelagertes Ankerteil 1 auf. Obere und untere Flußleitbleche 8, 8' dienen der Leitung des Magnetflusses. Zur Erzielung einer kostengünstigen Herstellung ist hierbei vorgesehen, daß der Magnetkern 2' des Magnetsystemes einstückig aus dem Material des Flußleitbleches 8' herausgearbeitet ist.Finally, a modified magnet system is shown in FIG. 6, which functions in the same way as the magnet system described above. This magnet system also has a coil former 4 and an armature part 1 rotatably mounted in front of it. Upper and lower flux guide plates 8, 8 'serve to conduct the magnetic flux. To achieve cost-effective production, it is provided that the magnetic core 2 'of the magnet system is made in one piece from the material of the flux guide plate 8'.

Dabei ist zunächst eine Zunge 20 aus dem Flußleitblech 8' ausgestanzt, die dann in Richtung auf das obere Flußleitblech 8 hin abgebogen ist und anschließend auf einem Teil ihrer Länge - magnetisch gut leitend - parallel zum oberen Flußleitblech verläuft. Eine Rückbiegung der Zunge und entsprechende Abwinklung ist dabei so gestaltet, daß das vordere Ende der Zunge sich mittig zwischen den beiden Flußleitblechen parallel zu diesen erstreckt. Dieses Ende der Zunge bildet dann den eigentlichen Kern des Magnetsystems, wobei auf diesen "Magnetkern" der Spulenkörper 4 aufgeschoben ist.First, a tongue 20 is punched out of the flux guide plate 8 ', which is then bent towards the upper flux guide plate 8 and then over a part of its length - magnetically good conductivity - parallel to upper flow baffle runs. A back bend of the tongue and a corresponding bend is designed so that the front end of the tongue extends parallel to the middle between the two flow baffles. This end of the tongue then forms the actual core of the magnet system, the coil body 4 being pushed onto this "magnetic core".

Das in der Fig. 7 dargestellte, weiterhin modifizierte Magnetsystem besteht im wesentlichen aus einem U-förmigen Magnetkern 21 mit einer Erregerwicklung 3 auf einem der beiden Schenkel und einem drehbar gelagerten, im wesentlichen länglichen Ankerteil 1. Die Drehachse 6 des Ankerteils befindet sich dabei vor der Öffnung des U-förmigen Magnetkerns, und das Ende 22 ragt zwischen die Schenkelenden 23 des Magnetkernes. Das Ankerteil besteht aus nichtmagnetischem Werkstoff, vorzugsweise Kunststoffmaterial, und in sein vorderes Ende 22 sind zwei gegensinnig polarisierte Permanentmagnete 24 eingefügt, deren Polarisierungsrichtung quer zum Magnetkernende, d. h. in Richtung der Verbindungslinie zwischen den beiden Schenkelenden 23 verläuft. Die beiden Permanentmagnete können dabei dicht aufeinandergepackt oder mit einer Zwischenlage 25 aus nichtmagnetischem Material in das Ankerteilende eingesetzt sein. Ggfs. kann auch vorgesehen sein, daß ein einstückiger Permanentmagnet verwendet wird, der beim Herstellprozeß so magnetisiert wurde, daß sich an seinen beiden Stirnflächen gleichnamige Pole befinden. Bei nicht bestromter Erregerwicklung wird das Ankerteilende zunächst in einer der beiden möglichen, stabilen Stellungen an einem der beiden Schenkelenden anliegen, und bei Bestromung der Erregerwicklung mit einem entsprechend gerichteten Strom bzw. Stromimpuls wird das Ankerteil in die andere stabile Endlage bewegt, in der es verharrt, bis die Erregerwicklung mit einem Strom entgegengesetzter Richtung beaufschlagt wird.The further modified magnet system shown in FIG. 7 essentially consists of a U-shaped magnetic core 21 with an excitation winding 3 on one of the two legs and a rotatably mounted, essentially elongated armature part 1. The axis of rotation 6 of the armature part is present the opening of the U-shaped magnetic core, and the end 22 protrudes between the leg ends 23 of the magnetic core. The armature part is made of non-magnetic material, preferably plastic material, and two front magnets 22 are inserted into its front end 22, the polarization direction of which extends transversely to the magnetic core end, ie in the direction of the connecting line between the two leg ends 23. The two permanent magnets can be packed tightly on top of one another or inserted with an intermediate layer 25 made of non-magnetic material into the end of the armature part. If necessary. can also be provided that a one-piece permanent magnet is used, which was magnetized during the manufacturing process so that there are poles of the same name on its two end faces. When the excitation winding is not energized, the armature part end will initially rest in one of the two possible, stable positions on one of the two leg ends, and when the excitation winding is energized with a correspondingly directed current or current pulse, the armature part is moved into the other stable end position in which it remains until a current of the opposite direction is applied to the field winding.

Zur Erkennung der Lage bzw. Stellung der Ankerteiles kann vorgesehen sein, daß vor dem Ende des Ankerteiles, d. h. zwischen den Schenkelenden eine Hallsonde 26 oder eine Induktionsspule o. ä. Hublagenerkennungsmittel angeordnet sind.To detect the position of the anchor part, it can be provided that before the end of the anchor part, i. H. a Hall probe 26 or an induction coil or similar stroke position detection means are arranged between the leg ends.

In der Fig. 7 ist noch dargestellt, wie mehrere Magnetsysteme dicht bei dicht nebeneinander angeordnet sein können. Zur Erzielung einer möglichst großen Packungsdichte ist dabei vorgesehen, daß der mit der Erregerwicklung 3 versehene Schenkel gerade ausgebildet ist und der zugehörige zweite Schenkel eine Kröpfung aufweist, wobei die Kröpfung etwa dem Halbmesser der Erregerspule entspricht, so daß die Systeme geschachtelt werden können.FIG. 7 also shows how a plurality of magnet systems can be arranged close to one another. To achieve the greatest possible packing density, it is provided that the leg provided with the excitation winding 3 is straight and the associated second leg has an offset, the offset corresponding approximately to the radius of the excitation coil, so that the systems can be nested.

In den Fig. 8A, 8B und 9 sind verschiedene Möglichkeiten der Ausbildung des Ankerteilendes 22 mit den entsprechenden Permanentmagneten 24 dargestellt. Dabei sind die Permanentmagnete in den Fig. 8A, 8B ringförmig ausgebildet und über ihre Dicke magnetisiert, während in der Fig. 9 zwei diametral magnetisierte Magnetringe vorgesehen sind, die nebeneinander in das Ankerteilende eingesetzt sind und deren Stellung zueinander durch Drehung beim Fertigungsprozeß des Ankerteils eingestellt wird, und die dann fixiert werden.8A, 8B and 9 different possibilities for the formation of the armature part end 22 with the corresponding permanent magnets 24 are shown. The permanent magnets in FIGS. 8A, 8B are ring-shaped and magnetized over their thickness, while in FIG. 9 two diametrically magnetized magnetic rings are provided, which are inserted next to one another in the end of the armature part and the position of which relative to one another is set by rotation during the manufacturing process of the armature part will, and then be fixed.

Claims (11)

  1. Magnet system for needle selection in textile machines, in particular a bistable magnet system, wherein the magnet system comprises an elongated magnet core (2, 2') provided with an excitation winding (3), and wherein disposed in front of the end face (5) of the magnet core is a rotatably supported, elongated armature part (1) made of plastic material, which extends substantially in an axial direction of the magnet core axis and whose end directed towards the end face of the magnet core is provided with a permanent magnet (7), characterised in that the polarising direction of the permanent magnet (7) extends at right angles to the end face or to the magnet core axis, and that disposed on either side of the magnet core (2, 2') is a flux-concentrating plate (8, 8') which extends from the end (9) of the magnet core, to which it is permeably connected, to at least over the region of the permanent magnet (7) in the armature part (1).
  2. Magnet system according to claim 1, characterised in that the magnet system is provided with an integral carrier body made of plastic material, which is designed to receive the magnet core (2) and the excitation winding (3) as well as to support the armature part (1), the carrier body
    a) having an axial recess (12), into which the magnet core (2) is insertable,
    b) having a circumferential cutout (13) in its bottom region for receiving the excitation winding (3), and
    c) having a journal-like projection (14) in its front region as a bearing point for the armature part (1).
  3. Magnet system according to claim 1 or 2, characterised in that a plurality of magnet systems are disposed adjacent to one another in a block-like module, and that the flux-concentrating plates of the individual magnet systems are combined on every side into, in each case, an integral flux-concentrating plate which overlaps all of the magnet systems.
  4. Magnet system according to claim 3, characterised in that the armature parts of the adjacent magnet systems of a block-like module are supported on a common axis.
  5. Magnet system according to claim 1, characterised in that the magnet core (2') is integrally formed from the material of the one flux-concentrating plate (8') in that
    a) a tongue (20) is punched out of the one flux-concentrating plate (8'),
    b) the tongue is bent up towards the other flux-concentrating plate (8) and then along a part of its length extends closely adjacent and parallel tosaidflux-concentratingplate,
    c) then is bent back in such a way that its end extends as magnet core (2') mid-way between and parallel to the flux-concentrating plates (8, 8'), and
    that a coil form comprising a bearing point for the armature part is mounted onto the tongue end.
  6. Magnet system according to claim 1, characterised in that the magnet core (21) is substantially U-shaped and on its one limb the excitation winding (3) is provided, that the armature part (1) is provided in front of the opening of the magnet core, its one end extending between the limb ends (23), and that said end is provided with two oppositely polarised permanent magnets (24).
  7. Magnet system according to claim 6, characterised in that the limb not provided with the excitation winding (3) has an offset, into which the excitation winding of an adjacent magnet system may engage.
  8. Magnet system according to claim 6, characterised in that the permanent magnets (24) are inserted into two suitably dimensioned cutouts of the armature part end (22).
  9. Magnet system according to claim 6, characterised in that the permanent magnets (24) are packed closely adjacent to one another and inserted into a suitably dimensioned cutout of the armature part end (22).
  10. Magnet system according to claim 6, characterised in that the two permanent magnets take the form of an integral magnet which in an axial direction has been magnetised in such a way that poles of the same polarity are formed at both end faces.
  11. Magnet system according to claim 6, characterised in that the two permanent magnets (24) are of an annular construction and diametrically magnetised, and that the permanent magnets are inserted arranged adjacent to one another into the armature part end (22), the position of the two magnets relative to one another being adjusted by rotation of the magnets and then fixed.
EP93106516A 1992-04-27 1993-04-22 Magnet system for needle selection in textile machines Expired - Lifetime EP0568866B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4213764A DE4213764C1 (en) 1992-04-27 1992-04-27 Magnet system for needle selection in textile machines
DE4213764 1992-04-27

Publications (2)

Publication Number Publication Date
EP0568866A1 EP0568866A1 (en) 1993-11-10
EP0568866B1 true EP0568866B1 (en) 1996-11-13

Family

ID=6457546

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93106516A Expired - Lifetime EP0568866B1 (en) 1992-04-27 1993-04-22 Magnet system for needle selection in textile machines

Country Status (3)

Country Link
EP (1) EP0568866B1 (en)
JP (1) JP2690440B2 (en)
DE (2) DE4213764C1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4300291C2 (en) * 1993-01-08 1996-09-05 Harting Elektronik Gmbh Magnet system for a selection block in textile machines
DE4407357C1 (en) * 1994-03-05 1995-05-11 Harting Elektronik Gmbh Device for needle selection in textile machines
DE19529945C2 (en) * 1995-08-16 1997-12-11 Leybold Ag Device for gripping and holding a flat substrate

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1635848C3 (en) * 1967-03-06 1978-11-23 Mayer & Cie Gmbh & Co, 7470 Albstadt Pattern device for circular knitting machines with rotating needle carriers
JPS5421465B2 (en) * 1973-02-23 1979-07-31
DE2938851A1 (en) * 1979-09-26 1981-04-09 Arno 4992 Espelkamp Scholz Electromagnetic equipment detecting electronic dual information - has independent electromagnetic systems built into common permanent magnet yoke
JPS59199850A (en) * 1983-04-26 1984-11-13 永田精機株式会社 Electromagnetic needle selector of electronic patterning circular knitting machine
US4972686A (en) * 1987-10-07 1990-11-27 Nagata Seiki Kabushiki Kaisha Electromagnetic needle selector for circular knitting machines

Also Published As

Publication number Publication date
JPH0610249A (en) 1994-01-18
DE4213764C1 (en) 1993-10-07
JP2690440B2 (en) 1997-12-10
DE59304456D1 (en) 1996-12-19
EP0568866A1 (en) 1993-11-10

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