EP0634062A1 - Collector and reinforcing ring for it - Google Patents

Collector and reinforcing ring for it

Info

Publication number
EP0634062A1
EP0634062A1 EP94906156A EP94906156A EP0634062A1 EP 0634062 A1 EP0634062 A1 EP 0634062A1 EP 94906156 A EP94906156 A EP 94906156A EP 94906156 A EP94906156 A EP 94906156A EP 0634062 A1 EP0634062 A1 EP 0634062A1
Authority
EP
European Patent Office
Prior art keywords
ring
reinforcement
support
support ring
collector
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.)
Granted
Application number
EP94906156A
Other languages
German (de)
French (fr)
Other versions
EP0634062B1 (en
Inventor
Friedrich W. Nettelhoff
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.)
Friedrich Nettelhoff Spezialfabrik fur Kleinkollektoren KG
Original Assignee
Friedrich Nettelhoff Spezialfabrik fur Kleinkollektoren KG
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 Friedrich Nettelhoff Spezialfabrik fur Kleinkollektoren KG filed Critical Friedrich Nettelhoff Spezialfabrik fur Kleinkollektoren KG
Publication of EP0634062A1 publication Critical patent/EP0634062A1/en
Application granted granted Critical
Publication of EP0634062B1 publication Critical patent/EP0634062B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R39/00—Rotary current collectors, distributors or interrupters
    • H01R39/02—Details for dynamo electric machines
    • H01R39/04—Commutators
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R39/00—Rotary current collectors, distributors or interrupters
    • H01R39/02—Details for dynamo electric machines
    • H01R39/14—Fastenings of commutators or slip-rings to shafts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
    • H01R43/06—Manufacture of commutators
    • H01R43/08—Manufacture of commutators in which segments are not separated until after assembly

Definitions

  • the invention relates to a collector according to the preamble of claim 1 and an armoring ring for such a collector according to the preamble of claim 2.
  • Collectors for simple use and low loads can be formed solely from lamellae and plastic molding compound, the lamellae being spaced and held on the circumference by the molding compound, which also forms an inner annular base body and typically consists of a thermosetting material, which can be reinforced by a proportion of glass fibers.
  • reinforcement rings With higher electrical, thermal and mechanical loads, however, reinforcement rings have proven to be expedient or necessary. Reinforcement rings of this type encompass the inside of the slats on undercuts of inner webs. Since the lamellae must be electrically insulated from one another for functional reasons, reinforcement rings must not be in conductive contact with the inner webs.
  • metallic reinforcement rings in particular steel reinforcement rings, which have been given a plastic insulating layer in a painting, immersion or sintering process. If the plastic softens, the insulation threatens to break down.
  • the expansion of the glass fibers when the temperature rises and when there is a high mechanical load leads to a "soft" behavior in which the lamellae are integrated into the plastic molding compound start working. This again leads to frictional heat within the collector, to inaccuracies in the dimensions of the collector running surface with a higher brush fire and higher mechanical stresses due to uneven running of the collector and dancing carbon brushes.
  • the object of the invention is to provide a collector or a reinforcement ring which allows a high mechanical and thermal load capacity, for example that of the metallic reinforcement ring, in particular the steel ring, to be achieved or used, and in particular the weaknesses of known metallic reinforcement rings and to avoid their isolation.
  • this object is achieved by a collector according to the preamble of claim 1 with the characterizing features of claim 1. Furthermore, the object is achieved on the basis of a reinforcing ring according to the preamble of claim 2 with the characterizing features of claim 2.
  • the weak point of the metallic reinforcement ring has so far been evident in its insulation. It was obvious to build up this insulation in the usual way with a relining or sheathing, in particular to start from plastics with a well practicable handling. However, this leads to the collector being destroyed at softening or destruction temperatures of the related thermoplastic or thermosetting plastic.
  • an intermediate layer made of a support ring made of a material that is pressure-resistant even at high working temperatures is suitable. and the work area of such a collector can be expanded significantly.
  • support ring reflects the knowledge that it is a component that performs pronounced support functions, namely a pressure transfer due to the centrifugal force between the metallic clamping ring and the lamella extensions. It is not necessary that such a support ring in turn can absorb tensile forces - these can be loaded onto the tension ring. It is also of interest that the support ring forms a unit which is fitted into the clamping ring. This ensures in the manufacture and assembly of the tension ring and support ring as well as in the handling of the reinforcement ring in collector production that it is easy to grasp and maintain its shape, as is particularly required for mechanical aids.
  • tension ring and support ring are coherently fitted into one another, expediently even with a press fit, so that they can be used not only in handling like a common intermediate ring, but also in the highly loaded collector in use, a solid unit with good pressure transmission ensure from the tension ring to the support ring and from this to the lamellae.
  • the support ring can be made of glass or another ceramic material in order to ensure high temperature and pressure resistance.
  • Such a ring is fixed in the finished, molded compound and is almost exclusively subjected to pressure, such materials being able to achieve extremely high stability.
  • Glass ceramic and other ceramic materials can be mixed with modern ones Manufacturing means of production precisely and economically.
  • a support ring from a fiber composite body, for example from glass fiber reinforced plastic. It is important that the material is highly filled. In this way, winding bodies with a minimized matrix portion of thermoplastic or thermosetting plastic can be manufactured, which only takes up unavoidable gaps between the fibers, but which, for the rest, allows the fibers to lie directly against one another.
  • Such a composite body can be produced, for example, in a common winding technique as a tube, the fibers being applied with a high tension and squeezing adhering matrix material to the outside, where it can be stripped off or twisted off after hardening.
  • the high degree of filling of the fiber composite body has proven to be extremely important for the stability of such a support ring.
  • the concept behind this provides that the glass fibers, which lie directly against one another and are firmly wound on one another, are able to withstand high local pressure within the collector between the tension ring and a particularly loaded lamella inner web if the matrix material is not usable Strength contribution can deliver more.
  • the fibers of a ring wound in this way retain their position in the border area for a long time due to their packing density, their firm abutment and also because of the long-fiber fixing in the circumferential direction. The insulation is thus maintained by the glass fibers, even if plastic components are in the reinforcement ring are softened.
  • glass fibers are mainly considered as the fiber material, although it is understood that other suitable fibers of high temperature and pressure resistance, in particular mineral fibers or ceramic fibers, are also suitable.
  • the filler material of the support ring which determines the compressive strength, need not be in fiber form either.
  • a granular, platelet-like or ribbon-like structure of a suitable material also appears fundamentally useful if it can be used to produce a support ring that is precise and stable for handling and temperature and pressure-resistant for use with the use of the smallest possible plastic components.
  • the support ring preferably has an axial projection on the tension ring at least on one side, so that it can first be inserted with this side into an undercut of the inner webs and also precludes direct contact between the tension ring and the inner web on the side.
  • the clamping ring can have an angled cross-sectional profile in order to establish a lateral positive connection to the support ring and to obtain a high level of security during handling, in particular when inserting the reinforcement ring into a collector and during pressing, that the clamping ring and support ring even when the temperature changes rapidly, do not detach from one another or shift relative to one another.
  • a metallic clamping ring with an angled cross-sectional profile can be obtained relatively easily in the production, since modern stamping techniques enable a stamping process starting from simple sheet metal plates, in which initially circular surface parts are deep-drawn into a pot shape, and then "punched out” therefrom to punch out a ring from the flanks of the deep-drawing area. From the cup or hat profile obtained in this way, an angled cross section results without any special precautions depending on the choice of the hole diameter.
  • two reinforcement rings are designated by 1, which run coaxially to a central collector axis 2 and which consist of a support ring 3 and a clamping ring 4.
  • the reinforcement rings behind grip collector lamellae of which only one lamella 5 is shown, for example, in its position intended for the finished collector, wherein it is continued with an inner web 6 towards the central collector axis 2.
  • the inner web 6 has two undercuts 7 and 8, which leave extensions 9 and 10 on the inner webs. These extensions 9 and 10 are enclosed by the clamping rings 1, so that the lamellae in particular do not move centrifugally from the central collector axis 2 to the outside.
  • a cross-sectional area marked by dash-dotted lines 11, 12 and 13 is filled with a plastic molding compound (not shown), so that a cylindrical ring body is formed.
  • the tension rings according to the invention shown have a special structure.
  • the support ring consists of a glass fiber plastic composite material which is highly filled with glass fiber material and in which the plastic forming a matrix is kept so small that it allows the glass fiber material to lie firmly on top of one another.
  • the support ring has a simple ring shape with a flat, rectangular cross section which firmly engages around the extensions 9 and 10.
  • the associated clamping ring 4 is a steel ring which is spaced apart by the support ring 3 from the lamella copper of the inner web 6 and also from the actual lamella body. With the sealing ring, it forms a jointly manageable reinforcement ring, in the interest of reliable handling and even more in the interest of one pressure-transmitting connection between the two ring parts (clamping ring / support ring) a press fit is specified.
  • the tension ring and support ring thus form a rigid and solid unit as a reinforcement ring.
  • the support ring can also be injected into the clamping ring.
  • the support ring 4 is axially offset. This creates an axial space 14 as an insulation distance between the clamping ring and lamellar copper.
  • the clamping ring forms a radially inwardly facing shoulder 15 which engages behind the support ring 3 and with which the clamping ring projects axially beyond the support ring.
  • this shoulder 15 creates a good dimensional stability of the clamping ring against oval deformations, but on the other hand also offers the possibility, when the reinforcing ring 1 is handled mechanically, to grip it safely and to press it uncritically into a ready-to-assemble set of plates.
  • the arrangement thus created can subsequently be filled with plastic molding compound to form a finished collector.
  • the clamping ring 1 is then held in position by the plastic molding compound and is insulated from the lamellar copper on its outer circumference and also in the intermediate space 14 by plastic molding compound.
  • the reinforcement rings 16 each comprise an inner support ring 3 and a tension ring 4, each with the support ring 3 and the clamping ring 4 according to FIG. 1 match.
  • An additional outer support ring 17 encloses the clamping ring 4 with a press fit and is thus a fixed component of the reinforcement ring 16.
  • This support ring 17 also ensures pressure support of the lamellae 5 towards the inside, so that they do not deflect towards the inside due to special external loads and thus cause an oval deformation within the collector and an additional load on adjacent slats in the sense of evasion to the outside.
  • FIG. 3 again shows a lamella of the type considered above, which (like all the other lamellae of a collector arranged in a ring) are to be held together by reinforcing rings 19, which consist of a support ring 3 (with the support ring corresponding numbering in FIG 1 and Fig. 2) and a clamping ring 20, which differs from the clamping rings considered above essentially in that it has a very extensive cross-sectional angle 21, which extends radially inwards outside the undercuts of the lamella.
  • This cross-sectional bending gives the clamping ring 20 a high degree of dimensional stability against oval deformations and elastic natural vibrations.
  • FIG. 4 shows two reinforcing rings 22 which encompass a clamping ring 23 with an angled cross-section (in this respect similar to the clamping ring 20 in FIG. 3), a supporting ring 24 with a relatively small cross-section being provided which is in an annular groove 25 of the clamping ring is pressed in and on the other side finds a matching hollow notch 26 in the inner web 6 of the lamella 5.
  • clamping ring 23, support ring 24 and lamella 5 find a positive fit axial definition.
  • the reinforcement ring 27 has a clamping ring 28 which is U-shaped in cross section and which surrounds the corresponding extension 9 or 10 of the lamella 5 radially on the outside and also radially on the inside.
  • a pressure-resistant connection is made on both sides by a support ring 29 or 30 with a flat rectangular cross-section, so that the extension 9 or 10 is clamped as between parallel clamping jaws and does not bend under load and thus more or less out the hold of the clamping ring 28 can "slip out”.
  • the clamping ring 28 has holes 31 on its end face formed by a U-leg, which allow the easy passage of plastic molding compound during pressing.
  • a clamping ring 27 is to be compared in FIG. 6 with a simplified form of a clamping ring 32, in which the second support ring 29 and, accordingly, the clamping function have been omitted.
  • the U-shaped cross section of the corresponding clamping ring 28 creates a high load capacity and inherent rigidity. At the same time, it is also able to act in the manner of a ring that stiffens the internal bore of such a collector against overload when pressed onto a shaft.
  • the support ring is a component that is mainly subjected to pressure and is therefore easy to manufacture from ceramic materials.
  • simple and advantageous production possibilities result.
  • pressing the tension ring and the support ring together corresponds to modern, fast and labor-saving manufacturing requirements and keeps the support ring under a pretension that is favorable for its task.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Insulating Bodies (AREA)
  • Motor Or Generator Current Collectors (AREA)
  • Manufacture Of Alloys Or Alloy Compounds (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Motor Or Generator Cooling System (AREA)
  • Reciprocating, Oscillating Or Vibrating Motors (AREA)
  • Motor Or Generator Frames (AREA)

Abstract

PCT No. PCT/EP94/00220 Sec. 371 Date Sep. 19, 1994 Sec. 102(e) Date Sep. 19, 1994 PCT Filed Jan. 27, 1994 PCT Pub. No. WO94/18726 PCT Pub. Date Aug. 18, 1994.For electric motor collectors with lamella inner cross members, which serve for anchoring the individual lamellas, protrude inwards running at least predominantly parallel to the collector axis and are provided with undercut surfaces, which are to be grasped from behind by reinforcing rings. Reinforcing rings are proposed which, aside from a metallic clamping ring, comprise a supporting ring, which is fitted positively into the metallic clamping ring and forms a double body with the clamping ring and is formed from a material, which is resistant to compression and insulating even at high operating temperatures. With this, reinforcing rings are produced from two partial rings, which are easily manufactured and easy to press together, or by the supporting ring which is brought into the clamping ring by injection molding. The reinforcing rings form a unit which can withstand extremely high thermal and mechanical stresses and imparts the collector with very high stability under load and fatigue endurance.

Description

Kollektor und Armierungsring hierzu Collector and reinforcement ring for this
Die Erfindung betrifft einen Kollektor nach dem Oberbegriff des Anspruchs 1 sowie einen Armierungs¬ ring für einen solchen Kollektor nach dem Oberbe¬ griff des Anspruchs 2.The invention relates to a collector according to the preamble of claim 1 and an armoring ring for such a collector according to the preamble of claim 2.
Kollektoren für einfache Verwendung und geringe Belastungen können allein aus Lamellen und Kunst¬ stoff-Preßmasse geformt werden, wobei die Lamellen am Umfang durch die Preßmasse distanziert und gehal¬ ten werden, die auch einen inneren ringförmigen Grundkörper bildet und typischerweise aus einem duroplastischen Material besteht, welches noch durch einen Anteil von Glasfasern verstärkt sein kann. Bei höheren elektrischen, thermischen und mechanischen Belastungen haben sich allerdings Armierungsringe als zweckmäßig bzw. notwendig erwie¬ sen. Solche Armierungsringe umgreifen die Lamellen innenseitig an Hinterschneidungen von Innenstegen. Da die Lamellen funktionsbedingt voneinander elek¬ trisch isoliert sein müssen, dürfen Armierungsringe keinen leitenden Kontakt zu den Innenstegen erhal¬ ten.Collectors for simple use and low loads can be formed solely from lamellae and plastic molding compound, the lamellae being spaced and held on the circumference by the molding compound, which also forms an inner annular base body and typically consists of a thermosetting material, which can be reinforced by a proportion of glass fibers. With higher electrical, thermal and mechanical loads, however, reinforcement rings have proven to be expedient or necessary. Reinforcement rings of this type encompass the inside of the slats on undercuts of inner webs. Since the lamellae must be electrically insulated from one another for functional reasons, reinforcement rings must not be in conductive contact with the inner webs.
Zu diesem Zweck hat es schon lange metallische Armierungsringe, insbesondere Stahl-Armierungsringe, gegeben, die etwa mit Isoliermaterial innenseitig hinterlegt wurden, um eine hohe Festigkeit, aber auch eine gute Isolierung zu erzielen. Diese aufwen¬ dige Vorgehensweise ist allerdings für eine moderne Großserienfertigung nicht durchhaltbar.For this purpose it has long been metallic Reinforcement rings, in particular steel reinforcement rings, which have been deposited on the inside with insulating material, for example, in order to achieve high strength but also good insulation. However, this complex procedure is not sustainable for modern large series production.
Weiterhin hat es Armierungsringe gegeben, die beim Verpressen der Lamellen mit Kunststoff-Preßmasse zu einem Kollektor sorgfältig von den Innenstegen der Lamellen distanziert worden sind, so daß zwi¬ schen metallischem Armierungsring und Lamellen jeweils Zwischenräume vorhanden waren, in die Kunst¬ stoff-Preßmasse eindringen kann. Eine so geschaffene Verspannung und Isolierung der Lamellen ist aller¬ dings unbefriedigend und schafft nur geringfügige Verbesserungen gegenüber einem Kollektor ohne Armie¬ rungsring, da die Kunststoff-Preßmasse bei einer für diese kritischen thermischen und mechanischen Belastung auch den Isolierabstand und die Drucküber¬ tragung zwischen Armierungsring und Lamellenstegen nicht mehr aufrechtzuerhalten vermag.There were also reinforcement rings which were carefully spaced from the inner webs of the lamellae when the lamellae were pressed with a plastic molding compound to form a collector, so that there were gaps between the metal reinforcing ring and lamellae into which the plastic molding compound penetrated can. A bracing and insulation of the lamellae created in this way is unsatisfactory, however, and creates only minor improvements compared to a collector without a reinforcement ring, since the plastic molding compound, with a critical thermal and mechanical load, also the insulation distance and the pressure transmission between the reinforcement ring and can no longer maintain slat webs.
Letzteres gilt auch für metallische Armierungsringe, also insbesondere Stahl-Armierungsringe, die eine Kunststoff-Isolierschicht in einem Lackier-, Tauch¬ oder Sinterverfahren erhalten haben. Bei Erweichen des Kunststoffs droht die Isolierung zusammenzu¬ brechen.The latter also applies to metallic reinforcement rings, in particular steel reinforcement rings, which have been given a plastic insulating layer in a painting, immersion or sintering process. If the plastic softens, the insulation threatens to break down.
Auch Armierungsringe aus einem üblichen Verbund¬ material, etwa glasfaserverstärktem Kunststoff gebildet, haben sich unzulänglich gezeigt. Die Dehnung der Glasfasern bei Temperaturerhöhung und bei hoher mechanischer Belastung führt zu einem zu "weichen" Verhalten, bei dem die Lamellen in ihrer Einbindung in die Kunststoff-Preßmasse zu arbeiten beginnen. Dies führt wieder zu Reibungs¬ wärme innerhalb des Kollektors, zu Maßungenauigkei- ten der Kollektor- Lauffläche mit höherem Bürstenfeuer und höheren mechanischen Beanspruchungen infolge unrunden Laufs des Kollektors und tanzender Kohle¬ bürsten.Reinforcement rings made from a common composite material, such as glass fiber reinforced plastic, have also been shown to be inadequate. The expansion of the glass fibers when the temperature rises and when there is a high mechanical load leads to a "soft" behavior in which the lamellae are integrated into the plastic molding compound start working. This again leads to frictional heat within the collector, to inaccuracies in the dimensions of the collector running surface with a higher brush fire and higher mechanical stresses due to uneven running of the collector and dancing carbon brushes.
Aufgabe der Erfindung ist es, einen Kollektor bzw. einen Armierungsring zu schaffen, der eine hohe mechanische und thermische Belastbarkeit, etwa die des metallischen Armierungsrings, insbesondere des Stahlrings, zu erzielen bzw. zu nutzen erlaubt und insbesondere die Schwächen bekannter metalli¬ scher Armierungsringe und deren Isolation zu vermei¬ den gestattet.The object of the invention is to provide a collector or a reinforcement ring which allows a high mechanical and thermal load capacity, for example that of the metallic reinforcement ring, in particular the steel ring, to be achieved or used, and in particular the weaknesses of known metallic reinforcement rings and to avoid their isolation.
Gemäß der Erfindung wird diese Aufgabe von einem Kollektor nach dem Oberbegriff des Anspruchs 1 ausgehend mit den kennzeichnenden Merkmalen des Anspruchs 1 gelöst. Weiterhin wird die Aufgabe von einem Armierungsring nach dem Oberbegriff des Anspruchs 2 ausgehend mit den kennzeichnenden Merk¬ malen des Anspruchs 2 gelöst.According to the invention, this object is achieved by a collector according to the preamble of claim 1 with the characterizing features of claim 1. Furthermore, the object is achieved on the basis of a reinforcing ring according to the preamble of claim 2 with the characterizing features of claim 2.
Erkennbar hat die Schwachstelle des metallischen Armierungsrings bisher in seiner Isolation gelegen. Es lag zwar nahe, diese Isolation in gebräuchlicher Weise mit einer Unterfütterung oder Ummantelung aufzubauen, insbesondere von Kunststoffen mit einer gut praktikablen Handhabung auszugehen. Diese führen allerdings dazu, daß der Kollektor bei Erweichungs¬ bzw. Zerstörungstemperaturen des verwandten thermo¬ plastischen oder duroplastischen Kunststoffs zerstört wurde. Demgegenüber ist eine Zwischenlage aus einem dem Armierungsring schlüssig eingepaßten Stützring aus einem auch bei hohen Arbeitstempera¬ turen druckfesten Material geeignet, die Belastbar- keit und den Arbeitsbereich eines solchen Kollektors ganz entscheidend zu erweitern.The weak point of the metallic reinforcement ring has so far been evident in its insulation. It was obvious to build up this insulation in the usual way with a relining or sheathing, in particular to start from plastics with a well practicable handling. However, this leads to the collector being destroyed at softening or destruction temperatures of the related thermoplastic or thermosetting plastic. On the other hand, an intermediate layer made of a support ring made of a material that is pressure-resistant even at high working temperatures is suitable. and the work area of such a collector can be expanded significantly.
Der Begriff des "Stützrings" gibt dabei die Erkennt¬ nis wieder, daß es sich um ein Bauteil handelt, das ausgesprochene Stützfunktionen, nämlich eine Druckübertragung infolge der Fliehkraft zwischen dem metallischen Spannring und den Lamellen-Fort¬ sätzen übernimmt. Nicht erforderlich ist es, daß ein solcher Stützring seinerseits Zugkräfte auf¬ zunehmen vermag - diese können dem Spannring auf¬ gelastet werden. Von Interesse ist dabei auch, daß der Stützring eine Einheit bildet, die dem Spannring eingepaßt ist. Dieses sichert in der Herstellung und in der Zusammenfügung von Spannring und Stützring wie auch in der Handhabung des Armierungsrings bei der Kollektorfertigung eine gute Faßbarkeit und Formtreue, wie sie insbesondere für mechanische Hilfsmittel zu fordern ist. Dazu gehört auch, daß Spannring und Stützring schlüssig, zweckmäßigerweise sogar mit Preßsitz, ineinander eingepaßt sind, so daß diese nicht nur in der Handhabung wie ein gemeinsamer Zwischenring einzusetzen sind, sondern auch in dem im Einsatz befindlichen und hochbelasteten Kollektor eine feste Einheit mit guter Druckübertragung vom Spann¬ ring auf den Stützring und von diesem auf die Lamel¬ len gewährleisten.The term "support ring" reflects the knowledge that it is a component that performs pronounced support functions, namely a pressure transfer due to the centrifugal force between the metallic clamping ring and the lamella extensions. It is not necessary that such a support ring in turn can absorb tensile forces - these can be loaded onto the tension ring. It is also of interest that the support ring forms a unit which is fitted into the clamping ring. This ensures in the manufacture and assembly of the tension ring and support ring as well as in the handling of the reinforcement ring in collector production that it is easy to grasp and maintain its shape, as is particularly required for mechanical aids. This also includes that the tension ring and support ring are coherently fitted into one another, expediently even with a press fit, so that they can be used not only in handling like a common intermediate ring, but also in the highly loaded collector in use, a solid unit with good pressure transmission ensure from the tension ring to the support ring and from this to the lamellae.
Im einfachsten Fall kann der Stützring aus Glas oder einem sonstigen keramischen Material bestehen, um eine hohe Temperatur- und Druckfestigkeit zu gewährleisten. Im fertigen, mit Preßmasse geformten Kollektor liegt ein solcher Ring fest und wird fast ausschließlich auf Druck belastet, wobei der¬ artige Materialien eine äußerst hohe Standfestig¬ keit erzielen können. Glaskeramische und sonstige keramische Materialien lassen sich mit modernen Fertigungsmitteln präzise und wirtschaftlich her¬ stellen.In the simplest case, the support ring can be made of glass or another ceramic material in order to ensure high temperature and pressure resistance. Such a ring is fixed in the finished, molded compound and is almost exclusively subjected to pressure, such materials being able to achieve extremely high stability. Glass ceramic and other ceramic materials can be mixed with modern ones Manufacturing means of production precisely and economically.
Eine noch gebräuchlichere Technik stellt die Ferti¬ gung eines Stützrings aus einem Faserverbundkörper dar, etwa aus glasfaserverstärktem Kunststoff. Dabei ist es wichtig, daß es sich um hochgefülltes Material handelt. So können Wickelkörper mit mini¬ miertem Matrix-Anteil an thermoplastischem oder duroplastischem Kunststoff gefertigt werden, der nur unvermeidliche Zwischenräume zwischen den Fasern in Anspruch nimmt, im übrigen aber die Fasern wei- testgehend direkt aneinander anliegen läßt. Ein solcher Verbundkörper kann beispielsweise in einer gängigen Wickeltechnik als Rohr gefertigt sein, wobei die Fasern mit einem hohen Zug aufgebracht werden und anhaftendes Matrix-Material nach außen verquetschen, wo es abgestreift oder nach dem Erhär¬ ten abgedreht werden kann.An even more common technique is the production of a support ring from a fiber composite body, for example from glass fiber reinforced plastic. It is important that the material is highly filled. In this way, winding bodies with a minimized matrix portion of thermoplastic or thermosetting plastic can be manufactured, which only takes up unavoidable gaps between the fibers, but which, for the rest, allows the fibers to lie directly against one another. Such a composite body can be produced, for example, in a common winding technique as a tube, the fibers being applied with a high tension and squeezing adhering matrix material to the outside, where it can be stripped off or twisted off after hardening.
Der hohe Füllungsgrad des Faserverbundkörpers hat sich als höchst bedeutsam für die Standfestigkeit eines solchen Stützringes erwiesen. Das gedankliche Konzept sieht dabei vor, daß die Glasfasern, welche direkt aneinanderliegen und fest aufeinanderge- wickelt sind, auch dann innerhalb des Kollektors hohem örtlichen Druck zwischen Spannring und einem besonders belasteten Lamellen-Innensteg standzuhal¬ ten vermögen, wenn der Matrix-Werkstoff keinen brauchbaren Festigkeitsbeitrag mehr zu liefern vermag. Die Fasern eines so gewickelten Ringes behalten aufgrund ihrer Packungsdichte, ihrer festen Aneinanderlage und auch aufgrund der langfaserigen Festlegung in Umfangsrichtung ihre Lage auch im Grenzbereich noch lange bei. Damit wird die Isolie¬ rung durch die Glasfasern aufrechterhalten, auch wenn Kunststoffbestandteile im Armierungsring erweicht sind.The high degree of filling of the fiber composite body has proven to be extremely important for the stability of such a support ring. The concept behind this provides that the glass fibers, which lie directly against one another and are firmly wound on one another, are able to withstand high local pressure within the collector between the tension ring and a particularly loaded lamella inner web if the matrix material is not usable Strength contribution can deliver more. The fibers of a ring wound in this way retain their position in the border area for a long time due to their packing density, their firm abutment and also because of the long-fiber fixing in the circumferential direction. The insulation is thus maintained by the glass fibers, even if plastic components are in the reinforcement ring are softened.
Ähnliches läßt sich bei einem preßgeformten Stütz¬ ring bewerkstelligen, wenn Fasermaterial unter Quetschdruck in eine Ring-, Rohr- oder Plattenform gepreßt wird, und zwar in einer Weise, die die Fasern selbst untereinander in einen Stützverbund bringt. Auch diese können kompakte und selbst bei Erweichungstemperatur des Matrix-Werkstoffs druck¬ feste Zwischenlagen zwischen Spannring und Innensteg schaffen. Dabei ist natürlich zu berücksichtigen, daß der Lamellenkörper aus Kunststoff-Preßmasse im übrigen den Innenbereich des Spannrings um¬ schließt und begrenzt, so daß selbst unzulänglich miteinander verbundene Fasern nicht frei ausweichen oder auswandern können.The same can be done with a press-formed support ring if fiber material is pressed under squeezing pressure into a ring, tube or plate shape, in a way that brings the fibers themselves into a support composite. These can also create compact intermediate layers between the tension ring and the inner web, even at the softening temperature of the matrix material. It should of course be taken into account that the lamellar body made of plastic molding compound otherwise encloses and delimits the inner region of the clamping ring, so that even inadequately interconnected fibers cannot freely escape or migrate.
Im Vorangehenden sind hauptsächlich Glasfasern als Fasermaterial in Betracht gezogen, wenngleich es sich versteht, daß andere geeignete Fasern hoher Temperatur- und Druckfestigkeit, insbesondere mine¬ ralische Fasern bzw. keramische Fasern, gleichfalls in Betracht kommen.In the foregoing, glass fibers are mainly considered as the fiber material, although it is understood that other suitable fibers of high temperature and pressure resistance, in particular mineral fibers or ceramic fibers, are also suitable.
Das die Druckfestigkeit bestimmende Füllmaterial des Stützrings braucht auch nicht in Faserform vorzuliegen. Auch eine körnige, plättchenartige oder bandförmige Struktur eines geeigneten Materials erscheint grundsätzlich brauchbar, wenn damit unter Verwendung möglichst geringer Kunststoffanteile ein für die Handhabung präziser und formfester und für den Einsatz temperatur- und druckfester Stützring zu fertigen ist.The filler material of the support ring, which determines the compressive strength, need not be in fiber form either. A granular, platelet-like or ribbon-like structure of a suitable material also appears fundamentally useful if it can be used to produce a support ring that is precise and stable for handling and temperature and pressure-resistant for use with the use of the smallest possible plastic components.
Vorzugsweise weist der Stützring zumindest auf einer Seite einen axialen Überstand über den Spann¬ ring auf, so daß er mit dieser Seite zuerst in eine Hinterschneidung der Innenstege eingeschoben werden kann und auch seitlich eine direkte Berührung zwischen Spannring und Innensteg ausschließt. Auf der anderen Seite kann der Spannring ein gewin¬ keltes Querschnittsprofil aufweisen, um damit einen seitlichen Formschluß zum Stützring herzustellen und bei der Handhabung, insbesondere beim Einbringen des Armierungsrings in einen Kollektor und beim Verpressen, eine hohe Sicherheit zu erhalten, daß sich Spannring und Stützring auch bei raschem Tem¬ peraturwechsel nicht voneinander lösen bzw. sich gegeneinander verschieben.The support ring preferably has an axial projection on the tension ring at least on one side, so that it can first be inserted with this side into an undercut of the inner webs and also precludes direct contact between the tension ring and the inner web on the side. On the other hand, the clamping ring can have an angled cross-sectional profile in order to establish a lateral positive connection to the support ring and to obtain a high level of security during handling, in particular when inserting the reinforcement ring into a collector and during pressing, that the clamping ring and support ring even when the temperature changes rapidly, do not detach from one another or shift relative to one another.
Ein metallischer Spannring mit einem gewinkelten Querschnittsprofil ist dabei in der Herstellung relativ einfach zu erhalten, da moderne Stanztech¬ niken eine von einfachen Blechplatten ausgehende Stanzfertigung ermöglichen, bei der zunächst kreis¬ förmige Flächenteile zu einer Topfform tiefgezogen werden, um dann hieraus durch "Auslochen" von den Flanken des Tiefziehbereichs einen Ring herauszu¬ stanzen. Aus einem dabei gewonnenen Topf- oder Hut-Profil ergibt sich ein abgewinkelter Querschnitt ohne besondere Vorkehrungen je nach Wahl des Aus¬ loch-Durchmessers.A metallic clamping ring with an angled cross-sectional profile can be obtained relatively easily in the production, since modern stamping techniques enable a stamping process starting from simple sheet metal plates, in which initially circular surface parts are deep-drawn into a pot shape, and then "punched out" therefrom to punch out a ring from the flanks of the deep-drawing area. From the cup or hat profile obtained in this way, an angled cross section results without any special precautions depending on the choice of the hole diameter.
Sechs Ausführungsbeispiele für den Gegenstand der Erfindung sind in der Zeichnung dargestellt und werden nachfolgend näher beschrieben. In der Zeich¬ nung zeigen:Six embodiments for the subject of the invention are shown in the drawing and are described in more detail below. In the drawing show:
Fig. 1 bis 6 verschiedene Spannringe, in Zuord¬ nung zu einer Lamelle entsprechend der Einbaulage.1 to 6 different clamping rings, in association with a lamella in accordance with the installation position.
In Fig. 1 sind mit 1 zwei Armierungsringe bezeich¬ net, die koaxial zu einer Kollektor-Mittelachse 2 verlaufen und die aus einem Stützring 3 und einem Spannring 4 bestehen. Die Armierungsringe hinter- greifen Kollektor-Lamellen, von denen nur eine Lamelle 5 beispielsweise in ihrer für den fertigen Kollektor vorgesehenen Lage eingezeichnet ist, wobei sie mit einem Innensteg 6 zu der Kollektor- Mittelachse 2 hin fortgesetzt ist. Der Innensteg 6 weist zwei Hinterschneidungen 7 bzw. 8 auf, die Fortsätze 9 bzw. 10 an den Innenstegen belassen. Diese Fortsätze 9 und 10 werden von den Spannrin¬ gen 1 umschlossen, so daß die Lamellen insbesondere nicht zentrifugal von der Kollektor-Mittelachse 2 nach außen hin ausweichen. Bei dem fertigen Kollek¬ tor ist ein von strichpunktierten Linien 11,12 und 13 markierter Querschnittsbereich mit einer Kunststoff-Preßmasse (nicht dargestellt) gefüllt, so daß ein zylindrischer Ringkörper gebildet ist.1, two reinforcement rings are designated by 1, which run coaxially to a central collector axis 2 and which consist of a support ring 3 and a clamping ring 4. The reinforcement rings behind grip collector lamellae, of which only one lamella 5 is shown, for example, in its position intended for the finished collector, wherein it is continued with an inner web 6 towards the central collector axis 2. The inner web 6 has two undercuts 7 and 8, which leave extensions 9 and 10 on the inner webs. These extensions 9 and 10 are enclosed by the clamping rings 1, so that the lamellae in particular do not move centrifugally from the central collector axis 2 to the outside. In the finished collector, a cross-sectional area marked by dash-dotted lines 11, 12 and 13 is filled with a plastic molding compound (not shown), so that a cylindrical ring body is formed.
Bei dem bekannten Grundkonzept eines solchen Kollek¬ tors mit einem die Innenstege 6 der Lamellen 5 an Hinterschneidungen 9,10 umgreifenden Spannring weisen die dargestellten erfindungsgemäßen Spann¬ ringe einen besonderen Aufbau auf. Der Stützring besteht aus einem mit Glasfasermaterial hochgefüll¬ ten Glasfaser-Kunststoff-Verbundwerkstoff, in dem der eine Matrix bildende Kunststoff so gering gehal¬ ten ist, daß er das Glasfasermaterial fest aufeinan- derliegen läßt. Der Stützring hat eine einfache Ringform mit einem flach-rechteckigen Querschnitt, der die Fortsätze 9 und 10 formschlüssig fest um¬ greift.In the known basic concept of such a collector with a tension ring encompassing the inner webs 6 of the slats 5 on undercuts 9, 10, the tension rings according to the invention shown have a special structure. The support ring consists of a glass fiber plastic composite material which is highly filled with glass fiber material and in which the plastic forming a matrix is kept so small that it allows the glass fiber material to lie firmly on top of one another. The support ring has a simple ring shape with a flat, rectangular cross section which firmly engages around the extensions 9 and 10.
Der jeweils zugehörige Spannring 4 ist ein Stahl¬ ring, der durch den Stützring 3 von dem Lamellen¬ kupfer des Innenstegs 6 und auch des eigentlichen Lamellenkörpers distanziert ist. Er bildet mit dem Dichtring einen gemeinschaftlich handhabbaren Armierungsring, wobei im Interesse einer zuverläs¬ sigen Handhabung und mehr noch im Interesse einer druckübertragenden Verbindung zwischen beiden Ring¬ teilen (Spannring/Stützring) ein Preßsitz vorgegeben ist. Spannring und Stützring bilden also eine starre und feste Einheit als Armierungsring. Ebenso kann der Stützring in den Spannring eingespritzt sein.The associated clamping ring 4 is a steel ring which is spaced apart by the support ring 3 from the lamella copper of the inner web 6 and also from the actual lamella body. With the sealing ring, it forms a jointly manageable reinforcement ring, in the interest of reliable handling and even more in the interest of one pressure-transmitting connection between the two ring parts (clamping ring / support ring) a press fit is specified. The tension ring and support ring thus form a rigid and solid unit as a reinforcement ring. The support ring can also be injected into the clamping ring.
Während der Stützring 3 in seiner axialen Länge etwa der axialen Länge der Hinterschneidung 7 bzw. 8 entspricht und damit die Hinterschneidung in Achsrichtung überdeckt, ist der Stützring 4 axial versetzt darubergelagert. Dies schafft einen axialen Zwischenraum 14 als Isolierabstand zwischen Spann¬ ring und Lamellenkupfer. Auf der anderen Seite bildet der Spannring eine radial nach innen weisende Schulter 15, die den Stützring 3 hintergreift und mit der der Spannring axial über den Stützring hinaussteht. Diese Schulter 15 schafft zum einen eine gute Formsteifigkeit des Spannrings gegen Ovalverformungen, bietet aber zum anderen auch die Möglichkeit, bei maschineller Handhabung des Armierungsrings 1 diesen unbedenklich zu greifen und unkritisch in einen montagefertigen Lamellensatz einzupressen.While the axial length of the support ring 3 corresponds approximately to the axial length of the undercut 7 or 8 and thus covers the undercut in the axial direction, the support ring 4 is axially offset. This creates an axial space 14 as an insulation distance between the clamping ring and lamellar copper. On the other hand, the clamping ring forms a radially inwardly facing shoulder 15 which engages behind the support ring 3 and with which the clamping ring projects axially beyond the support ring. On the one hand, this shoulder 15 creates a good dimensional stability of the clamping ring against oval deformations, but on the other hand also offers the possibility, when the reinforcing ring 1 is handled mechanically, to grip it safely and to press it uncritically into a ready-to-assemble set of plates.
Die so geschaffene Anordnung läßt sich nachfolgend mit Kunststoff-Preßmasse zu einem fertigen Kollek¬ tor verfüllen. Der Spannring 1 wird dann in seiner Lage durch die Kunststoff-Preßmasse festgehalten und an seinem Außenumfang wie auch in dem Zwischen¬ raum 14 durch Kunststoff-Preßmasse vom Lamellenkup¬ fer isoliert.The arrangement thus created can subsequently be filled with plastic molding compound to form a finished collector. The clamping ring 1 is then held in position by the plastic molding compound and is insulated from the lamellar copper on its outer circumference and also in the intermediate space 14 by plastic molding compound.
In Fig. 2 sind zwei (untereinander übereinstimmende) Armierungsringe 16 im Querschnitt dargestellt, und zwar wiederum in Zuordnung zu einer nur teil¬ weise wiedergegebenen Lamelle 5. Die Armierungs¬ ringe 16 umfassen jeweils einen inneren Stützring 3 und einen Spannring 4, die jeweils mit dem Stütz- ring 3 und dem Spannring 4 gemäß Fig. 1 übereinstim¬ men. Ein zusätzlicher äußerer Stützring 17 um¬ schließt den Spannring 4 mit Preßsitz und ist somit fester Bestandteil des Armierungsrings 16. Dieser Stützring 17 sichert auch eine Druckabstützung der Lamellen 5 nach innen hin, so daß diese nicht etwa aufgrund besonderer äußerer Belastungen nach innen ausweichen und damit eine Ovalverformung innerhalb des Kollektors und eine zusätzliche Belastung benachbarter Lamellen im Sinne eines Ausweichens nach außen hin hervorrufen.2 shows two (mutually matching) reinforcement rings 16 in cross section, again in association with an only partially reproduced lamella 5. The reinforcement rings 16 each comprise an inner support ring 3 and a tension ring 4, each with the support ring 3 and the clamping ring 4 according to FIG. 1 match. An additional outer support ring 17 encloses the clamping ring 4 with a press fit and is thus a fixed component of the reinforcement ring 16. This support ring 17 also ensures pressure support of the lamellae 5 towards the inside, so that they do not deflect towards the inside due to special external loads and thus cause an oval deformation within the collector and an additional load on adjacent slats in the sense of evasion to the outside.
In Fig. 3 ist wiederum eine Lammelle der zuvor betrachteten Art dargestellt, die (wie auch alle übrigen zu einem Ring arrangierten Lamellen eines Kollektors) durch Armierungsringe 19 zusammengehal¬ ten werden sollen, die aus einem Stützring 3 (mit dem Stützring entsprechender Numerierung in Fig. 1 und Fig. 2 übereinstimmend) und einem Spannring 20 bestehen, der sich von den vorbetrachteten Spann¬ ringen im wesentlichen dadurch unterscheidet, daß er eine sehr weitgehende Querschnittsabwinklung 21 aufweist, die außerhalb der Hinterschneidungen der Lamelle deutlich radial nach innen hin erstreckt ist. Diese Querschnittsabwinklung verleiht dem Spannring 20 eine hohe Formsteifigkeit gegen Oval¬ verformungen und elastische Eigenschwingungen.FIG. 3 again shows a lamella of the type considered above, which (like all the other lamellae of a collector arranged in a ring) are to be held together by reinforcing rings 19, which consist of a support ring 3 (with the support ring corresponding numbering in FIG 1 and Fig. 2) and a clamping ring 20, which differs from the clamping rings considered above essentially in that it has a very extensive cross-sectional angle 21, which extends radially inwards outside the undercuts of the lamella. This cross-sectional bending gives the clamping ring 20 a high degree of dimensional stability against oval deformations and elastic natural vibrations.
In Fig. 4 sind zwei Armierungsringe 22 dargestellt, die einen Spannring 23 mit abgewinkeltem Querschnitt (insoweit ähnlich dem Spannring 20 in Fig. 3) um¬ fassen, wobei ein Stützring 24 mit relativ kleinem Querschnitt vorgesehen ist, der in eine Ringnut 25 des Spannrings eingepreßt ist und auf der anderen Seite eine passende Hohlkerbe 26 in dem Innensteg 6 der Lamelle 5 findet. Hierdurch finden Spannring 23, Stützring 24 und Lamelle 5 eine formschlüssige axiale Festlegung.4 shows two reinforcing rings 22 which encompass a clamping ring 23 with an angled cross-section (in this respect similar to the clamping ring 20 in FIG. 3), a supporting ring 24 with a relatively small cross-section being provided which is in an annular groove 25 of the clamping ring is pressed in and on the other side finds a matching hollow notch 26 in the inner web 6 of the lamella 5. As a result, clamping ring 23, support ring 24 and lamella 5 find a positive fit axial definition.
In Fig. 5 ist ein besonders komplexer und hochbe¬ lastbarer Armierungsring 27 an jedem axialen Ende des Innenstegs 6 einer wie in den vorangehenden Beispielen ausgebildeten Lamelle 5 veranschaulicht. Der Armierungsring 27 weist einen im Querschnitt U-förmigen Spannring 28 auf, der den entsprechenden Fortsatz 9 bzw. 10 der Lamelle 5 radial außen wie auch radial innen umschließt. Auf beiden Seiten wird eine druckfeste Verbindung durch je einen Stützring 29 bzw. 30 mit flachem rechteckigem Quer¬ schnitt hergestellt, so daß der Fortsatz 9 bzw. 10 wie zwischen parallelen Klemmbacken eingespannt ist und sich nicht etwa unter Last abwinkein und damit mehr oder weniger aus dem Halt des Spann¬ rings 28 "herausrutschen" kann. Der Spannring 28 besitzt an seiner durch einen U-Schenkel gebildeten Stirnseite Löcher 31 , die den leichten Durchtritt von Kunststoff-Preßmasse beim Verpressen ermögli¬ chen.5 shows a particularly complex and highly resilient reinforcement ring 27 at each axial end of the inner web 6 of a lamella 5 designed as in the preceding examples. The reinforcement ring 27 has a clamping ring 28 which is U-shaped in cross section and which surrounds the corresponding extension 9 or 10 of the lamella 5 radially on the outside and also radially on the inside. A pressure-resistant connection is made on both sides by a support ring 29 or 30 with a flat rectangular cross-section, so that the extension 9 or 10 is clamped as between parallel clamping jaws and does not bend under load and thus more or less out the hold of the clamping ring 28 can "slip out". The clamping ring 28 has holes 31 on its end face formed by a U-leg, which allow the easy passage of plastic molding compound during pressing.
Der vorbeschriebenen Ausführungsform eines Spann¬ rings 27 ist in Fig. 6 eine vereinfachte Form eines Spannrings 32 gegenüberzustellen, bei der der zweite Stützring 29 und dementsprechend die Klammerfunktion entfallen ist. Mit nur einem Stützring 30 ist also lediglich eine radiale Haltefunktion, und zwar gegen in Fliehkraftrichtung wirkende Belastungen gegeben. Allerdings schafft der U-förmige Quer¬ schnitt des entsprechenden Spannrings 28 eine hohe Lastaufnahme und Eigensteifigkeit. Gleichzeitig ist er in der Lage, auch noch nach Art eines Rings zu wirken, der die innenliegende Bohrung eines solchen Kollektors gegen Überlastung beim Aufpressen auf eine Welle aussteift. In allen beschriebenen Beispielen ist der Stützring ein Bauteil, das hauptsächlich auf Druck beansprucht wird und von daher gut aus keramischen Materialien zu fertigen ist. Insbesondere bei einer zunächst vom Spannring getrennten Fertigung ergeben sich einfache und vorteilhafte Herstellungsmöglichkeiten. Schließlich entspricht ein Zusammenpressen von Spannring und Stützring modernen, schnellen und arbeitssparenden Fertigungsanforderungen und hält den Stützring unter einer für seine Aufgabe gün¬ stigen Vorspannung. The above-described embodiment of a clamping ring 27 is to be compared in FIG. 6 with a simplified form of a clamping ring 32, in which the second support ring 29 and, accordingly, the clamping function have been omitted. With only one support ring 30 there is therefore only a radial holding function, namely against loads acting in the direction of centrifugal force. However, the U-shaped cross section of the corresponding clamping ring 28 creates a high load capacity and inherent rigidity. At the same time, it is also able to act in the manner of a ring that stiffens the internal bore of such a collector against overload when pressed onto a shaft. In all of the examples described, the support ring is a component that is mainly subjected to pressure and is therefore easy to manufacture from ceramic materials. In particular in the case of a production initially separated from the clamping ring, simple and advantageous production possibilities result. Finally, pressing the tension ring and the support ring together corresponds to modern, fast and labor-saving manufacturing requirements and keeps the support ring under a pretension that is favorable for its task.

Claims

Ansprüche: Expectations:
1. Kollektor für einen Elektromotor mit fächer¬ förmig am Umfang verteilten Kup erlamellen, die mit Hinterschneidungen aufweisenden Innenstegen (6) in einem isolierenden Träger aus einer Kunststoff- Preßmasse verankert sind, wobei ein zumindest einen metallischen Spannring umfassender Armierungssring im Träger eingeschlossen ist, der die Innenstege an Fortsätzen im Bereich der Hinterschneidungen umgreift und zumindest auf seiner den Fortsätzen zugewandten Innenseite eine isolierende Zwischenlage aufweist, dadurch gekennzeichnet, daß die Zwischen¬ lage aus einem dem Spannring (4,20,23,28) schlüssig eingepaßten Stützring (3,17,24,29,30) aus einem auch bei hohen Arbeitstemperaturen druckfesten und isolierenden Material besteht.1. collector for an electric motor with fan-shaped distributed on the circumference lamellae, which are anchored with undercuts having inner webs (6) in an insulating support made of a plastic molding compound, an armature ring comprising at least one metal clamping ring being included in the support, which grips around the inner webs on extensions in the region of the undercuts and has an insulating intermediate layer at least on its inner side facing the extensions, characterized in that the intermediate layer consists of a support ring (3, 17) that fits the clamping ring (4, 20, 23, 28) , 24,29,30) consists of a pressure-resistant and insulating material even at high working temperatures.
2. Armierungsring für einen Elektromotor-Kollek¬ tor mit Lamellen-Innenstegen, die zur Verankerung der einzelnen Lamellen dienen, zumindest vorwiegend parallel zur Kollektor-Achse verlaufend nach innen vorspringen und mit vom Armierungsring zu hinter¬ greifenden Hinterschneidungsfl chen versehen sind, wobei der Armierungsring zumindest einen metal¬ lischen Spannring umfaßt und zumindest auf seiner den Hinterschneidungsflachen zugewandten Innenfläche eine isolierende Zwischenlage aufweist, dadurch gekennzeichnet, daß die Zwischenlage in Form eines dem Spannring (4,20,23,28) schlüssig eingepaßten und mit dem Spannring einen Doppelkörper bildenden Stützrings (3,17,24,29,30) aus auch bei hohen Ar¬ beitstemperaturen druckfestem und isolierendem Material gebildet ist.2. Armoring ring for an electric motor collector with lamella inner webs, which serve for anchoring the individual lamellas, at least predominantly project inwards running parallel to the collector axis and are provided with undercut surfaces to be behind the armoring ring, the armoring ring comprises at least one metallic clamping ring and at least on it The inner surface facing the undercut surfaces has an insulating intermediate layer, characterized in that the intermediate layer in the form of a support ring (3, 17, 24, 29, 30) which fits snugly into the tension ring (4, 20, 23, 28) and forms a double body with the tension ring. is formed from pressure-resistant and insulating material even at high working temperatures.
3. Armierungsring nach Anspruch 2, dadurch ge¬ kennzeichnet, daß der Stützring (3,17,24,29,30) aus einem bei Temperaturen über 200° C druckfestem und isolierendem Material besteht.3. Reinforcement ring according to claim 2, characterized ge indicates that the support ring (3,17,24,29,30) consists of a pressure-resistant and insulating material at temperatures above 200 ° C.
4. Armierungsring nach Anspruch 3, dadurch ge¬ kennzeichnet, daß der Stützring (3,17,24,29,30) aus einem bei Temperaturen über 250° C druckfestem und isolierendem Material besteht.4. Reinforcing ring according to claim 3, characterized ge indicates that the support ring (3,17,24,29,30) consists of a pressure-resistant and insulating material at temperatures above 250 ° C.
5. Armierungsring nach einem der Ansprüche 2 bis 4, dadurch gekennzeichnet, daß der Stützring (3, 17,24,29,30) aus Glas besteht.5. Reinforcement ring according to one of claims 2 to 4, characterized in that the support ring (3, 17,24,29,30) consists of glass.
6. Armierungsring nach einem der Ansprüche 2 bis 4, dadurch gekennzeichnet, daß der Stützring (3, 17,24,29,30) aus einem keramischen Material besteht.6. Reinforcement ring according to one of claims 2 to 4, characterized in that the support ring (3, 17,24,29,30) consists of a ceramic material.
7. Armierungsring nach einem der Ansprüche 2 bis 4, dadurch gekennzeichnet, daß der Stützring (3, 17,24,29,30) aus einem mit isolierenden druckfesten und hochtemperaturfesten Materialanteilen hochge¬ füllten Verbundwerkstoff besteht.7. Reinforcement ring according to one of claims 2 to 4, characterized in that the support ring (3, 17, 24, 29, 30) consists of a composite material filled with insulating, pressure-resistant and high-temperature-resistant material.
8. Armierungsring nach Anspruch 7, dadurch ge¬ kennzeichnet, daß der Stützring (3,17,24,29,30) aus einem hochgefüllten Faserverbundkörper besteht, in dem die Fasern weitgehend fest aneinander liegen. 8. reinforcing ring according to claim 7, characterized ge indicates that the support ring (3,17,24,29,30) consists of a highly filled fiber composite body in which the fibers are largely firmly against each other.
9. Armierungsring nach Anspruch 8, dadurch ge¬ kennzeichnet, daß der Faserverbundkörper aus einem mit hohem Zug gewickelten Wickelkörper besteht.9. Reinforcing ring according to claim 8, characterized ge indicates that the fiber composite body consists of a winding body wound with high tension.
10. Armierungsring nach Anspruch 8, dadurch ge¬ kennzeichnet, daß der Faserverbundkörper einen druckverdichteten hohen Faseranteil aufweist.10. Reinforcing ring according to claim 8, characterized ge indicates that the fiber composite body has a pressure-compressed high fiber content.
11. Armierungsring nach einem der Ansprüche 8 bis 10, dadurch gekennzeichnet, daß die Fasern zumindest größtenteils Glasfasern sind.11. Reinforcement ring according to one of claims 8 to 10, characterized in that the fibers are at least largely glass fibers.
12. Armierungsring nach einem der Ansprüche 2 bis 11, dadurch gekennzeichnet, daß der Stütz¬ ring (3,17,24,29,30) gegenüber dem Spannring (4, 20,23,28) zumindest auf einer Seite einen axialen Überstand aufweist.12. Reinforcing ring according to one of claims 2 to 11, characterized in that the support ring (3, 17, 24, 29, 30) has an axial projection at least on one side with respect to the clamping ring (4, 20, 23, 28) .
13. Armierungsring nach Anspruch 12, dadurch gekennzeichnet, daß der Spannring (4) auf der ande¬ ren Seite einen axialen Überstand über den Stütz¬ ring (3) aufweist und axial gegen diesen mit einer Anschlagschulter (15) anliegt.13. Reinforcement ring according to claim 12, characterized in that the clamping ring (4) on the other side has an axial protrusion over the support ring (3) and axially against this with a stop shoulder (15).
14. Armierungsring nach Anspruch 13, dadurch gekennzeichnet, daß der Spannring (4,20,23,28) ein gewinkeltes Querschnittsprofil aufweist.14. Reinforcing ring according to claim 13, characterized in that the clamping ring (4, 20, 23, 28) has an angled cross-sectional profile.
15. Armierungsring nach Anspruch 14, dadurch gekennzeichnet, daß der Armierungsring (28) einen U-Querschnitt aufweist.15. Reinforcement ring according to claim 14, characterized in that the reinforcement ring (28) has a U-cross section.
16. Armierungsring nach einem der Ansprüche 2 bis 15, dadurch gekennzeichnet, daß der Spannring (4,28) auf mehreren Seiten durch zumindest einen Stütz¬ ring (3,17,29,30) abgedeckt ist. 16. Reinforcement ring according to one of claims 2 to 15, characterized in that the clamping ring (4,28) is covered on several sides by at least one support ring (3,17,29,30).
EP94906156A 1993-02-01 1994-01-27 Collector for an electrical motor Expired - Lifetime EP0634062B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4302759A DE4302759C2 (en) 1993-02-01 1993-02-01 Collector with reinforcement ring
DE4302759 1993-02-01
PCT/EP1994/000220 WO1994018726A1 (en) 1993-02-01 1994-01-27 Collector and reinforcing ring for it

Publications (2)

Publication Number Publication Date
EP0634062A1 true EP0634062A1 (en) 1995-01-18
EP0634062B1 EP0634062B1 (en) 1998-08-05

Family

ID=6479364

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94906156A Expired - Lifetime EP0634062B1 (en) 1993-02-01 1994-01-27 Collector for an electrical motor

Country Status (9)

Country Link
US (1) US5497042A (en)
EP (1) EP0634062B1 (en)
JP (1) JPH07509116A (en)
CN (1) CN1037558C (en)
AT (1) ATE169428T1 (en)
DE (3) DE4302759C2 (en)
DK (1) DK0634062T3 (en)
ES (1) ES2122234T3 (en)
WO (1) WO1994018726A1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995022184A1 (en) * 1994-02-10 1995-08-17 Comtrade Handelsgesellschaft Mbh Armouring ring for rotary bodies and process for producing it
DK0944938T3 (en) * 1996-12-12 2002-07-01 Comtrade Handelsgmbh Commutator with reinforcement ring
DE19837961C2 (en) * 1998-08-21 2001-08-16 Kirkwood Ind Gmbh Commutator and method of making a commutator
US20030129855A1 (en) * 2001-12-21 2003-07-10 Douglas Richard E. Current collector assembly and method
DE10220033B4 (en) * 2002-05-04 2006-04-20 Friedrich Nettelhoff GmbH & Co. KG, Spezialfabrik für Kleinkollektoren Collector for an electric motor
JP3972729B2 (en) * 2002-05-23 2007-09-05 株式会社デンソー DC motor and engine starter
FR2912847B1 (en) * 2007-02-20 2009-05-01 Valeo Equip Electr Moteur COLLECTOR FOR ROTATING ELECTRIC MACHINE, IN PARTICULAR A MOTOR VEHICLE STARTER
DE102018118759A1 (en) * 2018-08-02 2020-02-06 Seg Automotive Germany Gmbh Rotor of an electrical machine, in particular a claw pole machine

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US2501502A (en) * 1945-10-11 1950-03-21 Gen Electric Current collector and cone insulator therefor
FR1451412A (en) * 1965-07-08 1966-01-07 Advanced training in rotating electrical appliance collectors
CH466418A (en) * 1967-11-17 1968-12-15 Bbc Brown Boveri & Cie Slip ring or collector shrunk onto a shaft, electrically insulated
US4056882A (en) * 1973-10-05 1977-11-08 Airscrew Howden Limited Method of making a dimensionally stable commutator
DE2557310A1 (en) * 1975-04-16 1976-10-21 Nippert Co COLLECTOR FOR AN ELECTRIC MOTOR
CH598699A5 (en) * 1976-12-10 1978-05-12 Bbc Brown Boveri & Cie
DD132381A1 (en) * 1977-05-13 1978-09-20 Fritz Donath COMMUNICATOR FOR ELECTRICAL MACHINES
DE3048470C2 (en) * 1980-12-22 1992-03-05 Kautt & Bux Kg, 7000 Stuttgart Commutator and process for its manufacture
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DE4015705C2 (en) * 1990-05-16 1993-11-11 Nettelhoff Friedrich Fa Collector for an electric motor or generator
JPH0771387B2 (en) * 1990-05-31 1995-07-31 株式会社マキタ Commutator
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Also Published As

Publication number Publication date
JPH07509116A (en) 1995-10-05
CN1101788A (en) 1995-04-19
DE4302759C2 (en) 1996-11-14
ATE169428T1 (en) 1998-08-15
WO1994018726A1 (en) 1994-08-18
DE9321246U1 (en) 1996-09-26
ES2122234T3 (en) 1998-12-16
DE4302759A1 (en) 1994-08-04
DK0634062T3 (en) 1999-05-03
CN1037558C (en) 1998-02-25
EP0634062B1 (en) 1998-08-05
US5497042A (en) 1996-03-05
DE59406599D1 (en) 1998-09-10

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