EP1808941A1 - Slip ring brush and slip ring device containing it - Google Patents

Slip ring brush and slip ring device containing it Download PDF

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Publication number
EP1808941A1
EP1808941A1 EP06021459A EP06021459A EP1808941A1 EP 1808941 A1 EP1808941 A1 EP 1808941A1 EP 06021459 A EP06021459 A EP 06021459A EP 06021459 A EP06021459 A EP 06021459A EP 1808941 A1 EP1808941 A1 EP 1808941A1
Authority
EP
European Patent Office
Prior art keywords
region
brush element
slip ring
brush
cross
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
EP06021459A
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German (de)
French (fr)
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EP1808941B1 (en
Inventor
Ludwig Angerpointner
Klaus Drost
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.)
LTN Servotechnik GmbH
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LTN Servotechnik GmbH
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Publication date
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Publication of EP1808941A1 publication Critical patent/EP1808941A1/en
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Publication of EP1808941B1 publication Critical patent/EP1808941B1/en
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Anticipated expiration legal-status Critical

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    • 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
    • H01R39/18—Contacts for co-operation with commutator or slip-ring, e.g. contact brush
    • H01R39/24—Laminated contacts; Wire contacts, e.g. metallic brush, carbon fibres
    • 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
    • H01R39/38—Brush holders
    • H01R39/39—Brush holders wherein the brush is fixedly mounted in the holder

Definitions

  • the invention relates to a slip ring brush and a slip ring unit, which is equipped with this slip ring brush, according to claim 1 or claim 9.
  • Slip ring assemblies often include a slip ring brush and slip rings, with the slip ring brush slidingly in contact with rotating slip rings during operation.
  • slip ring units are used in many technical fields to electrical signals or electrical power z. B. to transfer from a stationary to a rotating electrical unit. It is important that a good and lasting contact between the slip ring brush and the slip rings is given about by resilient brush elements, even if, for example, the entire slip ring unit is exposed to vibrations.
  • the invention has for its object to provide slip ring brushes and slip ring units, which can be produced with minimal effort, and which are of high quality with respect to a secure sliding contact even in a small space.
  • the slip ring brush according to the invention comprises a holder and at least one brush element, which has three locally differently arranged regions.
  • the brush element In the first region, the brush element is connected to the holder, or the brush element is fixed there to the holder.
  • the second region is predetermined for contacting with a slip ring and has a cross-sectional geometry with a, in particular for the electrical function, predetermined cross-sectional area.
  • the third region of the brush element has the same cross-sectional area, that is, an equal cross-sectional area, as the second region, and is disposed between the first region and the second region.
  • the cross-sectional geometry of the brush element in the third region is designed so that it deviates from the cross-sectional geometry of the second region.
  • the respective cross-sectional geometries of the second region and third region are thus shaped differently.
  • the effective spring stiffness is that spring stiffness to understand, which is crucial for the reliable operation of a slip ring unit.
  • the effective spring movement of the brush element serves to ensure the sliding contact, even if the corresponding Slip ring has geometric irregularities, or the slip ring unit is exposed during operation vibration.
  • the effective spring stiffness thus refers to the spring property of the brush element in the direction of the slip ring towards or away from the slip ring, or in the radial direction with respect to the axis of rotation of the slip ring unit.
  • the effective forces, which are decisive for the pressing of the brush element on the respective slip ring are directed substantially in the direction of the axis of rotation of the slip ring unit.
  • the cross-sectional geometry of the third region of the brush element is designed so that a reduced bending resistance to bending moments resulting from the pressing forces and which are directed perpendicular to the axis of rotation of the slip ring unit, and thus reduces the spring stiffness of the brush member. This is achieved in particular by reducing the material thickness of the brush element in a direction orthogonal to the axis of rotation of the slip ring unit and transversely to the contour (transverse to the longitudinal direction) of the brush element. Nevertheless, the absolute value of the cross-sectional area is not reduced.
  • the slip ring brush is configured such that the third region of the brush element is arranged closer to the first region than to the second region. This consideration applies to adjacent areas. Since a third region is always arranged between a first region and a second region, the second region is closer to the first region than the second region, along the contour or contour of the brush element.
  • the slip ring brush is designed such that the effective spring stiffness of the brush element refers to spring movements, which have a directional component in a predetermined direction. Then, a dimension of the brush member in the third area is smaller than a dimension of the brush member in the second area, the dimensions being in the same predetermined direction.
  • the brush element has two opposite legs, wherein in particular the brush element is configured so that in each case a second region is arranged on the two opposite legs.
  • At least one of the opposite legs of the brush element is assigned a third area.
  • the second region moves in a direction parallel to this plane.
  • a dimension of the brush element in the third region is smaller than a dimension of the brush element in the second region. Both dimensions are oriented in this direction or apply to this direction.
  • the brush element is thus configured such that the effective spring movements during operation of the respective slip ring unit in a plane, and not skewed in space, run.
  • the reduction of the size of the brush element in its third area is consequently to be determined in a direction parallel to this plane.
  • the special case that the reduced dimension of the brush element lies in this plane is of course also covered by the phrase "parallel".
  • the brush element in the second region has a circular cross-sectional geometry, in which case consequently the cross-sectional geometry of the brush element in the third region deviates from a circular shape.
  • the invention further comprises a slip ring unit comprising at least one slip ring, a holder and at least one brush element.
  • the brush element and the slip ring are rotatable relative to each other about an axis of rotation.
  • the brush element may be configured according to the preceding description. Accordingly, the third region of the brush element lies between the second region (contact section slip ring - brush element) and the first region in which the brush element is connected to the holder.
  • the cross-sectional geometry of the brush element in the third region is also designed here so that this reduction the effective spring stiffness of the brush element deviates from the cross-sectional geometry of the second region.
  • a brush element in the third region has a dimension of the cross-sectional geometry that is greater than a dimension of the cross-sectional geometry of the brush element in the second region, the dimensions being oriented in each case in one direction with a directional component parallel to the axis of rotation, or in particular exactly are oriented parallel to the axis of rotation of the slip ring unit. Because the cross-sectional area in the second and in the third region of the brush element is the same, that of the cross-sectional geometry of the brush element is weakened or tapered in the third region orthogonal to the axis of rotation relative to the second region, so that the effective spring stiffness is reduced.
  • a dimension is smaller than the dimension orthogonal thereto, which dimension is oriented in one direction with a direction component parallel to the rotation axis.
  • the dimension orthogonal thereto may be oriented in a direction parallel to the axis of rotation.
  • the effective spring stiffness refers to spring movements which have a directional component in a direction orthogonal to the axis of rotation.
  • a dimension of the brush element in the third area is smaller than a dimension of the brush element in the second area. Both dimensions are in turn oriented in the direction with the directional component orthogonal to the axis of rotation.
  • the effective spring stiffness therefore usually refers to spring or bending movements, which are aligned about a bending axis parallel to the axis of rotation of the brush element.
  • the cross-sectional geometry of the brush element in the third region is weakened or tapered orthogonally to the bending axis in comparison to the second region, because there the dimension is reduced orthogonal to the axis of rotation in comparison to the second region. The effective spring stiffness is thus also reduced.
  • the slip ring unit is configured such that a dimension of the brush element in the third region in a direction with a direction component parallel to the axis of rotation is greater than a dimension in the third region, which is oriented orthogonal to this direction of the axis of rotation.
  • the brush element in the third region in the direction of the axis of rotation is thicker than in the direction perpendicular to the axis of rotation in such a way that the effective spring stiffness of the brush element is reduced.
  • the dimension of the brush element in the third region is greater than a dimension of the brush element in the second region, wherein the dimensions are each oriented in the same direction with a directional component parallel to the axis of rotation.
  • the slip ring has a circumferential groove, wherein the brush element rests in its second area in this groove.
  • the groove has a V-shaped geometry. Especially the combination of a circular cross-sectional geometry of the second region with a V-shaped groove contributes to a high-quality electrical sliding contact.
  • the slip-ring brush comprises a holder 1 which, in the exemplary embodiment presented, is resistant to bending and is designed as a printed circuit board.
  • a holder 1 which, in the exemplary embodiment presented, is resistant to bending and is designed as a printed circuit board.
  • brush elements 2 which are designed in the example shown as a wire hanger connected.
  • the brush elements 2 comprise three locally differently arranged regions 2.1, 2.2, 2.3, which each fulfill different functions.
  • two so-called first regions 2.1 are provided on the brush elements 2, in which the respective brush element 2 is connected to the holder 1.
  • Said connection is achieved via two attachment points 4, which are designed here as soldering points and thus represent a mechanical and an electrical connection of the brush element 2 in the first areas 2.1 with the holder 1.
  • the soldering points are designed as plated-through holes, so that solder pads 1.1 are in electrical contact with the brush elements 2 on the opposite side (relative to the brush element 2) of the holder 1. At this solder pads 1.1 connecting cable can be contacted, so that the brush elements 2 can be electrically connected to another device.
  • the representation of the connection cable was omitted.
  • the brush elements 2 which are all of identical construction here, furthermore have a second region 2.2, which is characterized in that it has a circular cross-sectional geometry Q 2 with a cross-sectional area A and a diameter d.
  • the second region 2.2 is also predetermined for contacting with a slip ring 3.1, and is in the assembled slip ring unit on slip ring 3.1 on.
  • the brush elements 2 are made in the presented embodiment of a 20 mm long wire with a diameter of 0.2 mm by a bending process.
  • the cross-sectional area A thus results in about 3.14 ⁇ 10 -2 mm 2 .
  • Each brush element 2 also has a third region 2.3.
  • the respective third region is characterized, inter alia, by the fact that it is arranged between the first region 2.1 - the connection point to the holder 1 - and the second region 2.2. Starting from a second area 2.2, following the course of the brush element or the wireframe, therefore initially comes a third area 2.3, before a first area 2.1 is reached.
  • each of the third regions 2.3 has a specific cross-sectional geometry Q 3 , whose function will be discussed below.
  • the brush elements 2 also each have three legs 2a, 2b, 2c and have a substantially U-shaped or ⁇ -shaped, so that the brush elements 2 each have an opening. Accordingly, two legs 2a, 2b face each other, wherein each of these legs 2a, 2b each have a second area 2.2 can be assigned.
  • the brush elements 2 are configured symmetrically with respect to a virtual line which intersects the leg 2c centrally and orthogonally.
  • the holder 1 and the brush elements 2 thus form the slip ring brush, which in the embodiment shown represents the stator in a slip ring unit.
  • the holder 1 comes to lie according to the figures parallel to an x, y plane.
  • a rotor 3 is provided in a slip ring unit, which consists of a plurality of electrically conductive slip rings 3.1 here.
  • the slip rings 3.1 are axially lined up on an insulating support sleeve 3.2, wherein between adjacent slip rings 3.1 an electrically non-conductive insulating ring 3.3 is arranged.
  • all slip rings 3.1 are arranged coaxially.
  • the axis of rotation of the rotor 3 is simultaneously the axis of rotation Y of the slip ring unit, so that the rotor 3 is rotatable about the axis of rotation Y relative to the slip ring brush.
  • Each slip ring 3.1 has a circumferential groove 3.11, which in the example shown in a sectional plane on which the axis of rotation Y is located, has a V-shaped geometry. On their inside, the slip rings 3.1 are electrically contacted, each with a cable, which is not shown in the figures for clarity.
  • FIG. 2 shows a section ZZ parallel to the x, y plane which passes through the brush elements 2 in the second regions 2.2.
  • the brush elements 2 have in their second regions 2.2 a circular cross-sectional geometry Q 2 with a cross-sectional area A and a diameter d (see also FIG. 3).
  • the electrical current to be transmitted is thus introduced, for example, from the slip ring 3.1 in the two second regions 2.2 each brush element 2 and then flows to the attachment points 4.
  • About Lötpads 1.1 and connection cable to the bottom of the holder 1 then the electrical current to a stator-side device on be directed.
  • a decisive factor for this behavior is the effective spring stiffness of the brush element 2.
  • the geometric plane E is arranged orthogonal to the x, y plane.
  • the opposite legs 2a, 2b in particular in the second regions 2.2 in the x-direction (see figures) or orthogonal to the axis of rotation Y in the plane E move.
  • the distance X between the two opposing second regions 2.2 can change due to the effective spring movement, or that the distance between the axis of rotation Y and a second region 2.2 can be variable, for. B. with eccentricity errors.
  • the cross-sectional geometry Q 3 of the brush element 2 differs in each case in the third region 2.3 from the cross-sectional geometry Q 2 of the second Area 2.2, which is a circular shape, from.
  • this deviation is such that a dimension x 3 in the third region 2.
  • 3 of the brush element 2 in the direction x is smaller than the diameter d or the dimension x 2 .
  • the direction x is aligned parallel to the plane E or orthogonal to the axis of rotation Y.
  • the brush element 2 is therefore narrower or tapered in the third region 2.3 corresponding to the dimension x 3 in the x direction, while it has a thickening in the y direction with the dimension y 3 with respect to the dimension y 2 .
  • the cross-sectional geometries Q 2 , Q 3 of the second regions 2.2 and the third regions 2.3 are generated by cuts in planes which are each aligned perpendicular to the central axis of the bent wire constituting the brush element 2.
  • the cross-sectional geometries Q 2 , Q 3 are the shape or shape of the wire cross-sections in the respective regions 2.2, 2.3.
  • the dimension x 2 does not correspond exactly to the diameter d of the cross-sectional geometry Q 2 , because the orientation of the brush element 2 in the second regions 2. 2 has both a z and an x component.
  • the required effective contact force is ensured, so that the brush element 2 in the second region 2.2 permanently abuts the slip ring 3.1.
  • the effective contact forces which are decisive for the pressing of the brush element 2 on the respective slip ring 3.1, are thus aligned substantially in the radial direction to the axis of rotation Y of the slip ring unit. Owing to the oval configuration of the cross-sectional geometry Q 3 , or due to the reduced dimension x 3 of the brush element 2 in its third region 2.3 (FIG. 3 b) relative to dimension d or x 2 , the effective spring rigidity of the entire brush element 2 is reduced.
  • the reduced dimension x 3 of the brush element 2 refers to the x-direction, ie transverse to the longitudinal axis of the wire, from which the brush element 2 is made.
  • the x-direction is also, as already stated, directed orthogonal to the axis of rotation Y of the slip ring unit.
  • the cross-sectional area A in the third region 2.3 of the brush element 2 is also here, as in the second region 2.2 of the brush element 2, about 3.4 ⁇ 10 -2 mm 2 .
  • each brush element 2 was in the course of production of a piece of wire in the relevant third area 2.3 formed without cutting, such as by pressing. In this way, an optimized performance of the slip ring unit can be achieved easily and with low production costs. Due to the fact that the material of the brush element 2 is incompressible, the cross-sectional area A required to conduct the transfer current is also not reduced by the pressing at any point.
  • the brush element 2 has, moreover, only in the third region 2.3 a deviating from the circular cross-sectional geometry Q 3 , otherwise, the brush element 2 has a round cross-sectional geometry Q 2 with the diameter d.
  • the operating behavior of the slip ring unit is further improved by the fact that the brush element 2 is designed such that the third region 2.3 lies comparatively close to the attachment point or to the first region 2.1 of the brush element 2.
  • the distance between the third region 2.3 of the brush element 2 and the second region 2.2 is dimensioned relatively large.
  • the brush element 2 is designed such that in each case its third region 2.3 is arranged closer to the adjacent first region 2.1 than to the likewise adjacent second region 2.2.
  • the portion of the brush element 2 between the first region 2.1 and the third region 2.3 is shorter than the section of the brush element 2 between the second region 2.2 and the third region 2.3.
  • the effective spring stiffness is reduced, however, the effective pressure forces are not reduced by the measures described, because the geometry of the brush element 2 and thus the corresponding deformation in the slip ring unit is tuned to the required height of the pressure forces.
  • the holder 1 and the brush elements 2 serve as a stator, while the slip rings 3.1 are assigned to the rotor 3 of the slip ring unit.
  • the operation of the slip ring unit can also be reversed, so that holder 1 and the brush elements 2 rotate and the slip rings are 3.1.
  • the location and orientation of the geometric axis of rotation Y of the slip ring unit remain the same regardless of the mode of operation selected.

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  • Motor Or Generator Current Collectors (AREA)

Abstract

The brush has a holder (1), and a brush unit (2) having three areas (2.1-2.3), where the unit is connected with the holder in one area. The unit has a cross sectional geometry with a cross sectional surface in another area. The unit is formed in such a manner that the third area is arranged between the former area and the latter area. The other geometry is formed in the third area in such a manner that the geometry in the third area deviates from the geometry of the latter area for reducing effective spring constant of the unit.

Description

Die Erfindung betrifft eine Schleifringbürste und eine Schleifringeinheit, welche mit dieser Schleifringbürste ausgestattet ist, gemäß dem Anspruch 1 bzw. dem Anspruch 9.The invention relates to a slip ring brush and a slip ring unit, which is equipped with this slip ring brush, according to claim 1 or claim 9.

Schleifringeinheiten bestehen häufig unter anderem aus einer Schleifringbürste und Schleifringen, wobei die Schleifringbürste im Betrieb gleitenden Kontakt zu rotierenden Schleifringen hat. Derartige Schleifringeinheiten werden in vielen technischen Gebieten eingesetzt, um elektrische Signale oder elektrische Leistung z. B. von einer ortsfesten auf eine sich drehende elektrische Einheit zu übertragen. Dabei ist es wichtig, dass etwa durch federnde Bürstenelemente ein guter und andauernder Kontakt zwischen der Schleifringbürste und den Schleifringen gegeben ist, auch wenn zum Beispiel die gesamte Schleifringeinheit Vibrationen ausgesetzt ist.Slip ring assemblies often include a slip ring brush and slip rings, with the slip ring brush slidingly in contact with rotating slip rings during operation. Such slip ring units are used in many technical fields to electrical signals or electrical power z. B. to transfer from a stationary to a rotating electrical unit. It is important that a good and lasting contact between the slip ring brush and the slip rings is given about by resilient brush elements, even if, for example, the entire slip ring unit is exposed to vibrations.

In der Patentschrift US 4143929 ist eine Schleifringbürste gezeigt, bei der gebogene Bürstendrähte an einem Bürstenblock befestigt sind. Damit eine qualitativ hochwertige Anfederung erreicht wird, sind die Bürstendrähte gemäß der Figur 4 in US 4143929 relativ lang und in großem Radius gebogen.In the patent US 4143929 a slip ring brush is shown in which curved brush wires are attached to a brush block. In order to achieve a high-quality springing, the brush wires according to FIG. 4 are in FIG US 4143929 relatively long and bent in a large radius.

Eine ähnliche Anordnung ist aus der US 4583797 bekannt, in der auch gebogenen Bürstendrähte offenbart sind, welche vergleichsweise lang sind.A similar arrangement is from the US 4583797 in which also curved brush wires are disclosed, which are comparatively long.

In der Offenlegungsschrift DE 10324699 der Anmelderin ist ein Schleifring beschrieben, der im Wesentlichen U-förmige Bürstendrähte aufweist. Zur Verbesserung ihrer Federeigenschaften wird dort eine spezielle Lötanbindung an den Bürstenhalter vorgeschlagen.In the published patent application DE 10324699 The applicant is described a slip ring having substantially U-shaped brush wires. To improve their spring properties, a special solder connection to the brush holder is proposed there.

Der Erfindung liegt die Aufgabe zugrunde, Schleifringbürsten und Schleifringeinheiten zu schaffen, welche mit minimalem Aufwand herstellbar sind, und welche bezüglich einer sicheren schleifenden Kontaktierung auch bei kleinem Bauraum qualitativ hochwertig sind.The invention has for its object to provide slip ring brushes and slip ring units, which can be produced with minimal effort, and which are of high quality with respect to a secure sliding contact even in a small space.

Diese Aufgabe wird erfindungsgemäß durch die Merkmale der Ansprüche 1 und 9 gelöst.This object is achieved by the features of claims 1 and 9.

Entsprechend umfasst die erfindungsgemäße Schleifringbürste einen Halter und zumindest ein Bürstenelement, welches drei örtlich unterschiedlich angeordnete Bereiche aufweist. Im ersten Bereich ist das Bürstenelement mit dem Halter verbunden, bzw. das Bürstenelement ist dort am Halter fixiert. Der zweite Bereich ist für die Kontaktierung mit einem Schleifring vorbestimmt und weist eine Querschnittsgeometrie mit einer, insbesondere für die elektrische Funktion, vorgegebenen Querschnittsfläche auf. Der dritte Bereich des Bürstenelements weist die gleiche Querschnittsfläche, das heißt eine gleich große Querschnittsfläche, wie der zweite Bereich auf und ist zwischen dem ersten Bereich und dem zweiten Bereich angeordnet. Zur Reduzierung der wirksamen Federsteifigkeit des Bürstenelements ist die Querschnittsgeometrie des Bürstenelements im dritten Bereich so ausgestaltet, dass diese von der Querschnittsgeometrie des zweiten Bereichs abweicht. Die jeweiligen Querschnittsgeometrien des zweiten Bereichs und dritten Bereichs sind also unterschiedlich geformt.Accordingly, the slip ring brush according to the invention comprises a holder and at least one brush element, which has three locally differently arranged regions. In the first region, the brush element is connected to the holder, or the brush element is fixed there to the holder. The second region is predetermined for contacting with a slip ring and has a cross-sectional geometry with a, in particular for the electrical function, predetermined cross-sectional area. The third region of the brush element has the same cross-sectional area, that is, an equal cross-sectional area, as the second region, and is disposed between the first region and the second region. In order to reduce the effective spring rigidity of the brush element, the cross-sectional geometry of the brush element in the third region is designed so that it deviates from the cross-sectional geometry of the second region. The respective cross-sectional geometries of the second region and third region are thus shaped differently.

Unter der wirksamen Federsteifigkeit ist diejenige Federsteifigkeit zu verstehen, welche für die zuverlässige Funktion einer Schleifringeinheit ausschlaggebend ist. Die wirksame Federbewegung des Bürstenelements dient zur Sicherstellung des Schleifkontakts, auch wenn der entsprechende Schleifring geometrische Ungleichmäßigkeiten aufweist, oder die Schleifringeinheit im Betrieb Vibrationen ausgesetzt ist. Die wirksame Federsteifigkeit bezieht sich also auf die Federeigenschaft des Bürstenelements in Richtung zum Schleifring hin oder in Richtung vom Schleifring weg, bzw. in radialer Richtung bezogen auf die Drehachse der Schleifringeinheit. Die wirksamen Kräfte, welche für das Andrücken des Bürstenelements an den jeweiligen Schleifring maßgeblich sind, sind im Wesentlichen in Richtung der Drehachse der Schleifringeinheit gerichtet. Die Querschnittgeometrie des dritten Bereichs des Bürstenelements ist so ausgestaltet, dass ein verringerter Biegewiderstand gegenüber Biegemomenten, welche aus den Andrückkräften resultieren und die senkrecht zur Drehachse der Schleifringeinheit gerichtet sind, gegeben ist, und so die Federsteifigkeit des Bürstenelements reduziert wird. Dies wird insbesondere dadurch erreicht, dass in einer Richtung orthogonal zur Drehachse der Schleifringeinheit und quer zur Kontur (quer zur Längsrichtung) des Bürstenelements die Materialstärke des Bürstenelements reduziert ist. Gleichwohl ist der absolute Wert der Querschnittsfläche nicht verkleinert.Under the effective spring stiffness is that spring stiffness to understand, which is crucial for the reliable operation of a slip ring unit. The effective spring movement of the brush element serves to ensure the sliding contact, even if the corresponding Slip ring has geometric irregularities, or the slip ring unit is exposed during operation vibration. The effective spring stiffness thus refers to the spring property of the brush element in the direction of the slip ring towards or away from the slip ring, or in the radial direction with respect to the axis of rotation of the slip ring unit. The effective forces, which are decisive for the pressing of the brush element on the respective slip ring, are directed substantially in the direction of the axis of rotation of the slip ring unit. The cross-sectional geometry of the third region of the brush element is designed so that a reduced bending resistance to bending moments resulting from the pressing forces and which are directed perpendicular to the axis of rotation of the slip ring unit, and thus reduces the spring stiffness of the brush member. This is achieved in particular by reducing the material thickness of the brush element in a direction orthogonal to the axis of rotation of the slip ring unit and transversely to the contour (transverse to the longitudinal direction) of the brush element. Nevertheless, the absolute value of the cross-sectional area is not reduced.

Mit Vorteil ist die Schleifringbürste so ausgestaltet, dass der dritte Bereich des Bürstenelements näher am ersten Bereich angeordnet ist als am zweiten Bereich. Diese Betrachtung gilt für jeweils benachbarte Bereiche. Da ein dritter Bereich stets zwischen einem ersten Bereich und einem zweiten Bereich angeordnet ist, liegt dem zweiten Bereich der erste Bereich näher als der zweite Bereich und zwar entlang dem Verlauf bzw. der Kontur des Bürstenelements.Advantageously, the slip ring brush is configured such that the third region of the brush element is arranged closer to the first region than to the second region. This consideration applies to adjacent areas. Since a third region is always arranged between a first region and a second region, the second region is closer to the first region than the second region, along the contour or contour of the brush element.

Vorteilhaft ist die Schleifringbürste derart ausgestaltet, dass sich die wirksame Federsteifigkeit des Bürstenelements auf Federbewegungen bezieht, welche eine Richtungskomponente in eine vorbestimmte Richtung aufweisen. Dann ist eine Abmessung des Bürstenelements im dritten Bereich kleiner als eine Abmessung des Bürstenelements im zweiten Bereich, wobei die Abmessungen in der gleichen vorbestimmten Richtung gelten bzw. orientiert sind.Advantageously, the slip ring brush is designed such that the effective spring stiffness of the brush element refers to spring movements, which have a directional component in a predetermined direction. Then, a dimension of the brush member in the third area is smaller than a dimension of the brush member in the second area, the dimensions being in the same predetermined direction.

In weiterer Ausgestaltung der Erfindung weist das Bürstenelement zwei gegenüberliegende Schenkel auf, wobei insbesondere das Bürstenelement so konfiguriert ist, dass jeweils ein zweiter Bereich an den zwei gegenüberliegenden Schenkeln angeordnet ist.In a further embodiment of the invention, the brush element has two opposite legs, wherein in particular the brush element is configured so that in each case a second region is arranged on the two opposite legs.

In vorteilhafter Weise ist zumindest einem der gegenüberliegenden Schenkel des Bürstenelements ein dritter Bereich zugeordnet. Durch Federbewegungen des Bürstenelements innerhalb einer Ebene erfolgt eine Bewegung des zweiten Bereiches in eine Richtung parallel zu dieser Ebene. Dabei ist eine Abmessung des Bürstenelements im dritten Bereich kleiner als eine Abmessung des Bürstenelements im zweiten Bereich. Beide Abmessungen sind in dieser Richtung orientiert bzw. gelten für diese Richtung. Das Bürstenelement ist demnach derart konfiguriert, dass die wirksamen Federbewegungen im Betrieb der entsprechenden Schleifringeinheit in einer Ebene, und nicht windschief im Raum, verlaufen. Die Reduzierung der Abmessung des Bürstenelements in dessen dritten Bereich ist demzufolge in einer Richtung parallel zu dieser Ebene festzustellen. Der Sonderfall, dass die reduzierte Abmessung des Bürstenelements in dieser Ebene liegt, ist natürlich durch die Formulierung "parallel" auch abgedeckt.In an advantageous manner, at least one of the opposite legs of the brush element is assigned a third area. By spring movements of the brush element within a plane, the second region moves in a direction parallel to this plane. In this case, a dimension of the brush element in the third region is smaller than a dimension of the brush element in the second region. Both dimensions are oriented in this direction or apply to this direction. The brush element is thus configured such that the effective spring movements during operation of the respective slip ring unit in a plane, and not skewed in space, run. The reduction of the size of the brush element in its third area is consequently to be determined in a direction parallel to this plane. The special case that the reduced dimension of the brush element lies in this plane is of course also covered by the phrase "parallel".

In weiterer Ausgestaltung der Erfindung weist das Bürstenelement im zweiten Bereich eine kreisförmige Querschnittsgeometrie auf, wobei dann folglich die Querschnittsgeometrie des Bürstenelements im dritten Bereich von einer Kreisform abweicht.In a further embodiment of the invention, the brush element in the second region has a circular cross-sectional geometry, in which case consequently the cross-sectional geometry of the brush element in the third region deviates from a circular shape.

Die Erfindung umfasst weiterhin eine Schleifringeinheit, die mindestens einen Schleifring, einen Halter und mindestens ein Bürstenelement umfasst. Das Bürstenelement und der Schleifring sind um eine Drehachse relativ zueinander drehbar. Das Bürstenelement kann gemäß der vorangegangen Beschreibung ausgestaltet sein. Demnach liegt der dritte Bereich des Bürstenelements zwischen dem zweiten Bereich (Kontaktabschnitt Schleifring - Bürstenelement) und dem ersten Bereich, in dem das Bürstenelement mit dem Halter verbunden ist. Die Querschnittsgeometrie des Bürstenelements im dritten Bereich ist auch hier so ausgestaltet ist, dass diese zur Reduzierung der wirksamen Federsteifigkeit des Bürstenelements von der Querschnittsgeometrie des zweiten Bereichs abweicht.The invention further comprises a slip ring unit comprising at least one slip ring, a holder and at least one brush element. The brush element and the slip ring are rotatable relative to each other about an axis of rotation. The brush element may be configured according to the preceding description. Accordingly, the third region of the brush element lies between the second region (contact section slip ring - brush element) and the first region in which the brush element is connected to the holder. The cross-sectional geometry of the brush element in the third region is also designed here so that this reduction the effective spring stiffness of the brush element deviates from the cross-sectional geometry of the second region.

Mit Vorteil weist in der Schleifringeinheit ein Bürstenelement im dritten Bereich eine Abmessung der Querschnittsgeometrie auf, die größer ist als eine Abmessung der Querschnittsgeometrie des Bürstenelements im zweiten Bereich, wobei die Abmessungen jeweils in einer Richtung mit einer Richtungskomponente parallel zur Drehachse orientiert sind, oder insbesondere exakt parallel zur Drehachse der Schleifringeinheit orientiert sind. Dadurch dass die Querschnittsfläche im zweiten und im dritten Bereich des Bürstenelements gleich groß ist, ist die der Querschnittsgeometrie des Bürstenelements im dritten Bereich orthogonal zur Drehachse relativ zum zweiten Bereich geschwächt bzw. verjüngt, so dass die wirksame Federsteifigkeit reduziert wird. Entsprechend ist in der Querschnittsgeometrie des dritten Bereichs des Bürstenelements eine Abmessung kleiner ist als die dazu orthogonale die Abmessung die in einer Richtung mit einer Richtungskomponente parallel zur Drehachse orientiert ist. Insbesondere kann die dazu orthogonale Abmessung in einer Richtung parallel zur Drehachse orientiert sein.Advantageously, in the slip ring unit, a brush element in the third region has a dimension of the cross-sectional geometry that is greater than a dimension of the cross-sectional geometry of the brush element in the second region, the dimensions being oriented in each case in one direction with a directional component parallel to the axis of rotation, or in particular exactly are oriented parallel to the axis of rotation of the slip ring unit. Because the cross-sectional area in the second and in the third region of the brush element is the same, that of the cross-sectional geometry of the brush element is weakened or tapered in the third region orthogonal to the axis of rotation relative to the second region, so that the effective spring stiffness is reduced. Accordingly, in the cross-sectional geometry of the third portion of the brush member, a dimension is smaller than the dimension orthogonal thereto, which dimension is oriented in one direction with a direction component parallel to the rotation axis. In particular, the dimension orthogonal thereto may be oriented in a direction parallel to the axis of rotation.

Die wirksame Federsteifigkeit bezieht sich auf Federbewegungen, welche eine Richtungskomponente in eine Richtung orthogonal zur Drehachse aufweisen. Eine Abmessung des Bürstenelements im dritten Bereich ist kleiner als eine Abmessung des Bürstenelements im zweiten Bereich. Beide Abmessungen sind wiederum in der Richtung mit der Richtungskomponente orthogonal zur Drehachse orientiert.The effective spring stiffness refers to spring movements which have a directional component in a direction orthogonal to the axis of rotation. A dimension of the brush element in the third area is smaller than a dimension of the brush element in the second area. Both dimensions are in turn oriented in the direction with the directional component orthogonal to the axis of rotation.

Dieser Zusammenhang kann auch bezogen auf die Biegemomente, welche im Betrieb auf das Bürstenelement eingeleitet werden beschrieben werden: Die wirksame Federsteifigkeit bezieht sich demnach in der Regel auf Feder- bzw. Biegebewegungen, welche um eine Biegeachse parallel zur Drehachse des Bürstenelements ausgerichtet sind. Die Querschnittsgeometrie des Bürstenelements im dritten Bereich ist orthogonal zur Biegeachse im Vergleich zum zweiten Bereich geschwächt bzw. verjüngt, weil dort die Abmessung orthogonal zur Drehachse im Vergleich zum zweiten Bereich reduziert ist. Die wirksame Federsteifigkeit wird somit auch reduziert.This relationship can also be described with reference to the bending moments which are introduced during operation on the brush element: The effective spring stiffness therefore usually refers to spring or bending movements, which are aligned about a bending axis parallel to the axis of rotation of the brush element. The cross-sectional geometry of the brush element in the third region is weakened or tapered orthogonally to the bending axis in comparison to the second region, because there the dimension is reduced orthogonal to the axis of rotation in comparison to the second region. The effective spring stiffness is thus also reduced.

Mit Vorteil ist die Schleifringeinheit so ausgestaltet, dass eine Abmessung des Bürstenelements im dritten Bereich in einer Richtung mit einer Richtungskomponente parallel zur Drehachse größer ist als eine Abmessung im dritten Bereich, welche orthogonal zu dieser Richtung der Drehachse ausgerichtet ist. Insbesondere ist das Bürstenelement im dritten Bereich in Richtung der Drehachse dicker als in Richtung senkrecht zur Drehachse und zwar in der Weise, dass die wirksame Federsteifigkeit des Bürstenelements reduziert ist.Advantageously, the slip ring unit is configured such that a dimension of the brush element in the third region in a direction with a direction component parallel to the axis of rotation is greater than a dimension in the third region, which is oriented orthogonal to this direction of the axis of rotation. In particular, the brush element in the third region in the direction of the axis of rotation is thicker than in the direction perpendicular to the axis of rotation in such a way that the effective spring stiffness of the brush element is reduced.

In vorteilhafter Bauart ist die Abmessung des Bürstenelements im dritten Bereich größer ist als eine Abmessung des Bürstenelements im zweiten Bereich wobei die Abmessungen jeweils in derselben Richtung mit einer Richtungskomponente parallel zur Drehachse orientiert sind.In an advantageous design, the dimension of the brush element in the third region is greater than a dimension of the brush element in the second region, wherein the dimensions are each oriented in the same direction with a directional component parallel to the axis of rotation.

In weiterer Ausgestaltung der Erfindung weist der Schleifring eine umlaufende Nut auf, wobei das Bürstenelement in dessen zweitem Bereich in dieser Nut anliegt. Vorteilhaft hat die Nut eine V-förmige Geometrie. Gerade die Kombination einer kreisförmigen Querschnittsgeometrie des zweiten Bereichs mit einer V-förmigen Nut trägt zu einer qualitativ hochwertigen elektrischen Schleifkontaktierung bei.In a further embodiment of the invention, the slip ring has a circumferential groove, wherein the brush element rests in its second area in this groove. Advantageously, the groove has a V-shaped geometry. Especially the combination of a circular cross-sectional geometry of the second region with a V-shaped groove contributes to a high-quality electrical sliding contact.

Vorteilhafte Ausbildungen der Erfindung entnimmt man den abhängigen Ansprüchen.Advantageous embodiments of the invention will remove the dependent claims.

Weitere Einzelheiten und Vorteile der erfindungsgemäßen Schleifringbürste und der entsprechenden Schleifringeinheit ergeben sich aus der nachfolgenden Beschreibung eines Ausführungsbeispieles anhand der beiliegenden Figuren.Further details and advantages of the slip ring brush according to the invention and the corresponding slip ring unit will become apparent from the following description of an embodiment with reference to the accompanying figures.

Es zeigen die

Figur 1
eine Schnittdarstellung einer Schleifringeinheit,
Figur 2
eine Draufsicht im Teilschnitt auf die Schleifringeinheit,
Figuren 3a, 3b
Querschnittsgeometrien verschiedener Bereiche eines Bürstenelements.
It show the
FIG. 1
a sectional view of a slip ring unit,
FIG. 2
a top view in partial section of the slip ring unit,
FIGS. 3a, 3b
Cross-sectional geometries of different areas of a brush element.

Gemäß der Figur 1 umfasst die Schleifringbürste einen Halter 1, der im vorgestellten Ausführungsbeispiel biegesteif ist und als eine Leiterplatte ausgestaltet ist. Mit dem Halter 1 sind Bürstenelemente 2, die im gezeigten Beispiel als Drahtbügel ausgeführt sind, verbunden.According to FIG. 1, the slip-ring brush comprises a holder 1 which, in the exemplary embodiment presented, is resistant to bending and is designed as a printed circuit board. With the holder 1 are brush elements 2, which are designed in the example shown as a wire hanger connected.

Die Bürstenelemente 2 umfassen drei örtlich unterschiedlich angeordnete Bereiche 2.1, 2.2, 2.3, die jeweils unterschiedliche Funktionen erfüllen. So sind an den Bürstenelementen 2 jeweils zwei so genannte erste Bereiche 2.1 vorgesehen, in denen das jeweilige Bürstenelement 2 mit dem Halter 1 verbunden ist. Die besagte Verbindung wird über zwei Befestigungspunkte 4 erreicht, welche hier als Lötpunkte ausgestaltet sind und somit eine mechanische und eine elektrische Verbindung des Bürstenelements 2 in den ersten Bereichen 2.1 mit dem Halter 1 darstellen. Die Lötpunke sind als Durchkontaktierungen ausgestaltet, so dass Lödpads 1.1 an der gegenüber liegenden Seite (bezogen auf das Bürstenelement 2) des Halters 1 in elektrischem Kontakt zu den Bürstenelementen 2 stehen. An diese Lötpads 1.1 können Anschlusskabel kontaktiert werden, so dass die Bürstenelemente 2 mit einem weiteren Gerät elektrisch verbunden werden können. In den Figuren wurde auf die Darstellung der Anschlusskabel verzichtet.The brush elements 2 comprise three locally differently arranged regions 2.1, 2.2, 2.3, which each fulfill different functions. Thus, in each case two so-called first regions 2.1 are provided on the brush elements 2, in which the respective brush element 2 is connected to the holder 1. Said connection is achieved via two attachment points 4, which are designed here as soldering points and thus represent a mechanical and an electrical connection of the brush element 2 in the first areas 2.1 with the holder 1. The soldering points are designed as plated-through holes, so that solder pads 1.1 are in electrical contact with the brush elements 2 on the opposite side (relative to the brush element 2) of the holder 1. At this solder pads 1.1 connecting cable can be contacted, so that the brush elements 2 can be electrically connected to another device. In the figures, the representation of the connection cable was omitted.

Die Bürstenelemente 2, welche hier allesamt baugleich ausgestaltet sind, weisen weiterhin einen zweiten Bereich 2.2 auf, der dadurch charakterisiert ist, dass dieser eine kreisförmige Querschnittsgeometrie Q2 mit einer Querschnittsfläche A und einem Durchmesser d aufweist. Der zweite Bereich 2.2 ist darüber hinaus für die Kontaktierung mit einem Schleifring 3.1 vorbestimmt, und liegt in der zusammengebauten Schleifringeinheit am Schleifring 3.1 an. Die Bürstenelemente 2 sind im vorgestellten Ausführungsbeispiel aus einem 20 mm langen Draht mit einem Durchmesser von 0,2 mm durch ein Biegeverfahren hergestellt. Die Querschnittsfläche A ergibt sich somit zu etwa 3,14·10-2 mm2.The brush elements 2, which are all of identical construction here, furthermore have a second region 2.2, which is characterized in that it has a circular cross-sectional geometry Q 2 with a cross-sectional area A and a diameter d. The second region 2.2 is also predetermined for contacting with a slip ring 3.1, and is in the assembled slip ring unit on slip ring 3.1 on. The brush elements 2 are made in the presented embodiment of a 20 mm long wire with a diameter of 0.2 mm by a bending process. The cross-sectional area A thus results in about 3.14 × 10 -2 mm 2 .

Jedes Bürstenelement 2 weist ferner einen dritten Bereich 2.3 auf. Der jeweils dritte Bereich ist unter anderem dadurch charakterisiert, dass dieser zwischen dem ersten Bereich 2.1 - der Verbindungsstelle zum Halter 1 - und dem zweiten Bereich 2.2 angeordnet ist. Ausgehend von einem zweiten Bereich 2.2, dem Verlauf des Bürstenelements bzw. des Drahtbügels folgend, kommt demnach zunächst ein dritter Bereich 2.3, bevor ein erster Bereich 2.1 erreicht wird. Ferner weist jeder der dritten Bereiche 2.3 eine spezielle Querschnittsgeometrie Q3 auf, auf deren Funktion weiter unten eingegangen wird.Each brush element 2 also has a third region 2.3. The respective third region is characterized, inter alia, by the fact that it is arranged between the first region 2.1 - the connection point to the holder 1 - and the second region 2.2. Starting from a second area 2.2, following the course of the brush element or the wireframe, therefore initially comes a third area 2.3, before a first area 2.1 is reached. Furthermore, each of the third regions 2.3 has a specific cross-sectional geometry Q 3 , whose function will be discussed below.

Die Bürstenelemente 2 weisen außerdem jeweils drei Schenkel 2a, 2b, 2c auf und haben eine im Wesentliche U-förmige bzw. Ω-förmige Gestalt, so dass die Bürstenelemente 2 jeweils eine Öffnung haben. Demnach liegen zwei Schenkel 2a, 2b einander gegenüber, wobei jedem dieser Schenkel 2a, 2b jeweils ein zweiter Bereich 2.2 zugeordnet werden kann. Die Bürstenelemente 2 sind im Übrigen bezüglich einer virtuellen Linie, die den Schenkel 2c mittig und orthogonal schneidet, symmetrisch ausgestaltet.The brush elements 2 also each have three legs 2a, 2b, 2c and have a substantially U-shaped or Ω-shaped, so that the brush elements 2 each have an opening. Accordingly, two legs 2a, 2b face each other, wherein each of these legs 2a, 2b each have a second area 2.2 can be assigned. Incidentally, the brush elements 2 are configured symmetrically with respect to a virtual line which intersects the leg 2c centrally and orthogonally.

Unter anderem bilden der Halter 1 und die Bürstenelemente 2 also die Schleifringbürste, welche im gezeigten Ausführungsbeispiel den Stator in einer Schleifringeinheit darstellt. Der Halter 1 kommt dabei gemäß den Figuren parallel zu einer x, y-Ebene zu liegen.Among other things, the holder 1 and the brush elements 2 thus form the slip ring brush, which in the embodiment shown represents the stator in a slip ring unit. The holder 1 comes to lie according to the figures parallel to an x, y plane.

Als Gegenstück zum Stator ist in einer Schleifringeinheit ein Rotor 3 vorgesehen, welcher hier aus mehreren elektrisch leitenden Schleifringen 3.1 besteht. Die Schleifringe 3.1 sind auf einer isolierenden Trägerhülse 3.2 axial aneinander gereiht, wobei zwischen benachbarten Schleifringen 3.1 ein elektrisch nichtleitfähiger Isolierring 3.3 angeordnet ist. Im gezeigten Ausführungsbeispiel sind alle Schleifringe 3.1 koaxial angeordnet. Die Rotationsachse des Rotors 3 ist gleichzeitig die Drehachse Y der Schleifringeinheit, so dass der Rotor 3 um die Drehachse Y relativ zur Schleifringbürste drehbar ist. Jeder Schleifring 3.1 weist eine umlaufende Nut 3.11 auf, die im gezeigten Beispiel in einer Schnittebene auf der die Drehachse Y liegt, eine V-förmige Geometrie hat. An ihrer Innenseite sind die Schleifringe 3.1 mit jeweils einem Kabel elektrisch kontaktiert, welches der Übersichtlichkeit halber in den Figuren nicht dargestellt ist.As a counterpart to the stator, a rotor 3 is provided in a slip ring unit, which consists of a plurality of electrically conductive slip rings 3.1 here. The slip rings 3.1 are axially lined up on an insulating support sleeve 3.2, wherein between adjacent slip rings 3.1 an electrically non-conductive insulating ring 3.3 is arranged. In the illustrated embodiment, all slip rings 3.1 are arranged coaxially. The axis of rotation of the rotor 3 is simultaneously the axis of rotation Y of the slip ring unit, so that the rotor 3 is rotatable about the axis of rotation Y relative to the slip ring brush. Each slip ring 3.1 has a circumferential groove 3.11, which in the example shown in a sectional plane on which the axis of rotation Y is located, has a V-shaped geometry. On their inside, the slip rings 3.1 are electrically contacted, each with a cable, which is not shown in the figures for clarity.

Jedes Bürstenelement 2 liegt in seinen zweiten Bereichen 2.2 an einem Schleifring 3.1 an, und ist somit mit diesem in mechanischem und elektrischem Kontakt. In der Figur 2 ist ein Schnitt Z-Z parallel zur x,y-Ebene gezeigt, welcher durch die Bürstenelemente 2 in den zweiten Bereichen 2.2 hindurch geht. Die Bürstenelemente 2 weisen in ihren zweiten Bereichen 2.2 eine kreisförmige Querschnittsgeometrie Q2 mit einer Querschnittsfläche A und einem Durchmesser d auf (siehe auch Fig. 3). Durch die Kombination der kreisförmigen Querschnittsgeometrie Q2 mit der V-förmigen Geometrie der Nut 3.11 wird ein hochwertiges Laufverhalten der Schleifringeinheit erreicht. Etwaige axiale Relativverschiebungen zwischen dem Bürstenelement 2 und dem Schleifring 3.1 im Betrieb der Schleifringeinheit werden durch die Führung in der V-Nut 3.11 unterbunden.Each brush element 2 abuts in its second regions 2.2 on a slip ring 3.1, and is thus with this in mechanical and electrical Contact. FIG. 2 shows a section ZZ parallel to the x, y plane which passes through the brush elements 2 in the second regions 2.2. The brush elements 2 have in their second regions 2.2 a circular cross-sectional geometry Q 2 with a cross-sectional area A and a diameter d (see also FIG. 3). By combining the circular cross-sectional geometry Q 2 with the V-shaped geometry of the groove 3.11, a high-quality running behavior of the slip ring unit is achieved. Any axial relative displacements between the brush element 2 and the slip ring 3.1 during operation of the slip ring unit are prevented by the guide in the V-groove 3.11.

Der zu übertragende elektrische Strom wird also beispielsweise vom Schleifring 3.1 in die beiden zweiten Bereiche 2.2 jedes Bürstenelements 2 eingeleitet und fließt dann zu den Befestigungspunkten 4. Über Lötpads 1.1 und Anschlusskabel an der Unterseite des Halters 1 kann dann der elektrische Strom zu einem statorseitigen Gerät weiter geleitet werden. Für einen einwandfreien Betrieb der Schleifringeinheit ist es wichtig, dass jedes Bürstenelement 2 stets in Kontakt mit dem entsprechenden Schleifring 3.1 ist, bzw. jedes Bürstenelement 2 permanent am Schleifring 3.1 anliegt. Eine entscheidende Größe für dieses Verhalten ist die wirksame Federsteifigkeit des Bürstenelements 2. Die für das Anliegen wirksamen Federbewegungen des Bürstenelements 2 verlaufen im gezeigten Beispiel in einer Ebene E, welche im Raum derart ausgerichtet ist, dass diese von der Drehachse Y senkrecht durchdrungen wird. Mit anderen Worten ist die geometrische Ebene E orthogonal zur x,y-Ebene angeordnet. In Folge der Federbewegungen können sich die gegenüberliegenden Schenkel 2a, 2b, insbesondere in den zweiten Bereichen 2.2 in x-Richtung (siehe Figuren) bzw. orthogonal zur Drehachse Y in der Ebene E bewegen. Das heißt, dass sich der Abstand X zwischen den beiden gegenüberliegenden zweiten Bereichen 2.2 durch die wirksame Federbewegung verändern kann, bzw. dass der Abstand zwischen der Drehachse Y und einem zweiten Bereich 2.2 veränderlich sein kann, z. B. bei Exzentrizitätsfehlern. Zur positiven Beeinflussung der wirksamen Federsteifigkeit weicht die Querschnittsgeometrie Q3 des Bürstenelements 2 jeweils im dritten Bereich 2.3 von der Querschnittsgeometrie Q2 des zweiten Bereichs 2.2, die hier eine Kreisform ist, ab. Gemäß den Figuren 3a und 3b ist diese Abweichung dergestalt, dass eine Abmessung x3 im dritten Bereich 2.3 des Bürstenelements 2 in der Richtung x kleiner ist, als der Durchmesser d bzw. die Abmessung x2. Die Richtung x ist dabei parallel zur Ebene E bzw. orthogonal zur Drehachse Y ausgerichtet. Das Bürstenelement 2 ist also im dritten Bereich 2.3 entsprechend der Abmessung x3 in x-Richtung schmaler bzw. verjüngt, während es in y-Richtung mit der Abmessung y3 eine Verdickung gegenüber der Abmessung y2 aufweist.The electrical current to be transmitted is thus introduced, for example, from the slip ring 3.1 in the two second regions 2.2 each brush element 2 and then flows to the attachment points 4. About Lötpads 1.1 and connection cable to the bottom of the holder 1 then the electrical current to a stator-side device on be directed. For a proper operation of the slip ring unit, it is important that each brush element 2 is always in contact with the corresponding slip ring 3.1, or each brush element 2 is permanently applied to the slip ring 3.1. A decisive factor for this behavior is the effective spring stiffness of the brush element 2. The effective for the concern spring movements of the brush element 2 in the example shown in a plane E, which is aligned in space so that it is penetrated perpendicularly by the axis of rotation Y. In other words, the geometric plane E is arranged orthogonal to the x, y plane. As a result of the spring movements, the opposite legs 2a, 2b, in particular in the second regions 2.2 in the x-direction (see figures) or orthogonal to the axis of rotation Y in the plane E move. This means that the distance X between the two opposing second regions 2.2 can change due to the effective spring movement, or that the distance between the axis of rotation Y and a second region 2.2 can be variable, for. B. with eccentricity errors. In order to positively influence the effective spring stiffness, the cross-sectional geometry Q 3 of the brush element 2 differs in each case in the third region 2.3 from the cross-sectional geometry Q 2 of the second Area 2.2, which is a circular shape, from. According to FIGS. 3 a and 3 b, this deviation is such that a dimension x 3 in the third region 2. 3 of the brush element 2 in the direction x is smaller than the diameter d or the dimension x 2 . The direction x is aligned parallel to the plane E or orthogonal to the axis of rotation Y. The brush element 2 is therefore narrower or tapered in the third region 2.3 corresponding to the dimension x 3 in the x direction, while it has a thickening in the y direction with the dimension y 3 with respect to the dimension y 2 .

Die Querschnittsgeometrien Q2, Q3 der zweiten Bereiche 2.2 und der dritten Bereiche 2.3 werden erzeugt durch Schnitte in Ebenen, die jeweils senkrecht zur Mittelachse des gebogen Drahtes, aus dem das Bürstenelement 2 besteht, ausgerichtet sind. Es handelt sich also hier bei den Querschnittsgeometrien Q2, Q3 um die Form oder Gestalt der Drahtquerschnitte in den betreffenden Bereichen 2.2, 2.3. Gemäß den Figuren 1, und 3a entspricht die Abmessung x2 nicht exakt dem Durchmesser d der Querschnittsgeometrie Q2, weil die Ausrichtung des Bürstenelements 2 in den zweiten Bereichen 2.2 sowohl eine z- als auch eine x-Komponente aufweist.The cross-sectional geometries Q 2 , Q 3 of the second regions 2.2 and the third regions 2.3 are generated by cuts in planes which are each aligned perpendicular to the central axis of the bent wire constituting the brush element 2. In this case, the cross-sectional geometries Q 2 , Q 3 are the shape or shape of the wire cross-sections in the respective regions 2.2, 2.3. According to FIGS. 1 and 3a, the dimension x 2 does not correspond exactly to the diameter d of the cross-sectional geometry Q 2 , because the orientation of the brush element 2 in the second regions 2. 2 has both a z and an x component.

Durch die federnde Vorspannung der gegenüberliegenden Schenkel 2a, 2b des Bürstenelements 2 wird die erforderliche wirksame Kontaktkraft sichergestellt, so dass das Bürstenelement 2 in dessen zweiten Bereich 2.2 permanent am Schleifring 3.1 anliegt. Die wirksamen Kontaktkräfte, welche für das Andrücken des Bürstenelements 2 an den jeweiligen Schleifring 3.1 maßgeblich sind, sind also im Wesentlichen in radialer Richtung zur Drehachse Y der Schleifringeinheit hin ausgerichtet. Durch die ovale Ausgestaltung der Querschnittsgeometrie Q3, bzw. durch die reduzierte Abmessung x3 des Bürstenelements 2 in dessen dritten Bereich 2.3 (Fig. 3b) gegenüber der Abmessung d bzw. x2, wird die wirksame Federsteifigkeit des gesamten Bürstenelements 2 reduziert. Die reduzierte Abmessung x3 des Bürstenelements 2 bezieht sich auf die x-Richtung, also quer zur Längsachse des Drahtes, aus dem das Bürstenelement 2 gefertigt ist. Die x-Richtung ist außerdem, wie bereits dargelegt, orthogonal zur Drehachse Y der Schleifringeinheit gerichtet. Die Querschnittsfläche A im dritten Bereich 2.3 des Bürstenelements 2 beträgt auch hier, wie im zweiten Bereich 2.2 des Bürstenelements 2, etwa 3,4·10-2 mm2.By the resilient bias of the opposite legs 2a, 2b of the brush element 2, the required effective contact force is ensured, so that the brush element 2 in the second region 2.2 permanently abuts the slip ring 3.1. The effective contact forces, which are decisive for the pressing of the brush element 2 on the respective slip ring 3.1, are thus aligned substantially in the radial direction to the axis of rotation Y of the slip ring unit. Owing to the oval configuration of the cross-sectional geometry Q 3 , or due to the reduced dimension x 3 of the brush element 2 in its third region 2.3 (FIG. 3 b) relative to dimension d or x 2 , the effective spring rigidity of the entire brush element 2 is reduced. The reduced dimension x 3 of the brush element 2 refers to the x-direction, ie transverse to the longitudinal axis of the wire, from which the brush element 2 is made. The x-direction is also, as already stated, directed orthogonal to the axis of rotation Y of the slip ring unit. The cross-sectional area A in the third region 2.3 of the brush element 2 is also here, as in the second region 2.2 of the brush element 2, about 3.4 · 10 -2 mm 2 .

Um diese geometrischen Verhältnisse zu erreichen, wurde jedes Bürstenelement 2 im Zuge der Herstellung aus einem Drahtstück im relevanten dritten Bereich 2.3 spanlos umgeformt, etwa durch pressen. Auf diese Weise kann einfach und mit geringem Fertigungsaufwand ein optimiertes Betriebsverhalten der Schleifringeinheit erzielt werden. Dadurch, dass das Material des Bürstenelements 2 inkompressibel ist, wird auch die zur Leitung des Übertragungsstroms erforderliche Querschnittsfläche A durch das Pressen an keiner Stelle reduziert. Das Bürstenelement 2 hat im Übrigen nur im dritten Bereich 2.3 einen von der Kreisform abweichende Querschnittsgeometrie Q3, ansonsten weist das Bürstenelement 2 eine runde Querschnittsgeometrie Q2 mit dem Durchmesser d auf.In order to achieve these geometrical conditions, each brush element 2 was in the course of production of a piece of wire in the relevant third area 2.3 formed without cutting, such as by pressing. In this way, an optimized performance of the slip ring unit can be achieved easily and with low production costs. Due to the fact that the material of the brush element 2 is incompressible, the cross-sectional area A required to conduct the transfer current is also not reduced by the pressing at any point. The brush element 2 has, moreover, only in the third region 2.3 a deviating from the circular cross-sectional geometry Q 3 , otherwise, the brush element 2 has a round cross-sectional geometry Q 2 with the diameter d.

Verbessert wird das Betriebsverhalten der Schleifringeinheit weiterhin dadurch, dass das Bürstenelement 2 so ausgestaltet ist, dass der dritte Bereich 2.3 vergleichsweise nahe an der Befestigungsstelle, bzw. am ersten Bereich 2.1 des Bürstenelements 2 liegt. Dagegen ist der Abstand zwischen dem dritten Bereich 2.3 des Bürstenelements 2 und dem zweiten Bereich 2.2 relativ groß bemessen. Im vorgestellten Ausführungsbeispiel ist das Bürstenelement 2 so ausgestaltet, dass jeweils dessen dritter Bereich 2.3 näher am benachbarten ersten Bereich 2.1 angeordnet ist als am ebenfalls benachbarten zweiten Bereich 2.2. Mit anderen Worten ist der Abschnitt des Bürstenelements 2 zwischen dem ersten Bereich 2.1 und dem dritten Bereich 2.3 kürzer als der Abschnitt des Bürstenelements 2 zwischen dem zweiten Bereich 2.2 und dem dritten Bereich 2.3.The operating behavior of the slip ring unit is further improved by the fact that the brush element 2 is designed such that the third region 2.3 lies comparatively close to the attachment point or to the first region 2.1 of the brush element 2. By contrast, the distance between the third region 2.3 of the brush element 2 and the second region 2.2 is dimensioned relatively large. In the exemplary embodiment presented, the brush element 2 is designed such that in each case its third region 2.3 is arranged closer to the adjacent first region 2.1 than to the likewise adjacent second region 2.2. In other words, the portion of the brush element 2 between the first region 2.1 and the third region 2.3 is shorter than the section of the brush element 2 between the second region 2.2 and the third region 2.3.

Durch die besondere Ausgestaltung des Bürstenelements 2 wird die wirksame Federsteifigkeit reduziert, allerdings werden die wirksamen Andrückkräfte durch die beschriebenen Maßnahmen nicht verringert, weil die Geometrie des Bürstenelements 2 und damit die entsprechende Verformung in der Schleifringeinheit auf die erforderliche Höhe der Andrückkräfte abgestimmt wird.Due to the particular embodiment of the brush element 2, the effective spring stiffness is reduced, however, the effective pressure forces are not reduced by the measures described, because the geometry of the brush element 2 and thus the corresponding deformation in the slip ring unit is tuned to the required height of the pressure forces.

Im beschriebenen Ausführungsbeispiel dienen der Halter 1 und die Bürstenelemente 2 als Stator, während die Schleifringe 3.1 dem Rotor 3 der Schleifringeinheit zugeordnet sind. Selbstverständlich kann die Funktionsweise der Schleifringeinheit auch umgekehrt werden, so dass Halter 1 und die Bürstenelemente 2 rotieren und die Schleifringe 3.1 stehen. Der Ort und die Ausrichtung der geometrischen Drehachse Y der Schleifringeinheit bleiben jedoch, unabhängig von der gewählten Funktionsweise, gleich.In the described embodiment, the holder 1 and the brush elements 2 serve as a stator, while the slip rings 3.1 are assigned to the rotor 3 of the slip ring unit. Of course, the operation of the slip ring unit can also be reversed, so that holder 1 and the brush elements 2 rotate and the slip rings are 3.1. However, the location and orientation of the geometric axis of rotation Y of the slip ring unit remain the same regardless of the mode of operation selected.

Claims (20)

Schleifringbürste, bestehend aus einem Halter (1) und einem Bürstenelement (2), welches drei Bereiche (2.1, 2.2, 2.3) aufweist, wobei das Bürstenelement (2) - im ersten Bereich (2.1) mit dem Halter (1) verbunden ist, - im zweiten Bereich (2.2), welcher für die Kontaktierung mit einem Schleifring (3.1) vorbestimmt ist, eine Querschnittsgeometrie (Q2) mit einer Querschnittsfläche (A) aufweist, - im dritten Bereich (2.3) die gleiche Querschnittsfläche (A) aufweist, wie im zweiten Bereich (2.2), und das Bürstenelement (2) zudem derart ausgestaltet ist, dass dessen dritter Bereich (2.3), zwischen dem ersten Bereich (2.1) und dem zweiten Bereich (2.2) angeordnet ist,
dadurch gekennzeichnet, dass die Querschnittsgeometrie (Q3) des Bürstenelements (2) im dritten Bereich (2.3) so ausgestaltet ist, dass diese zur Reduzierung der wirksamen Federsteifigkeit des Bürstenelements (2) von der Querschnittsgeometrie (Q2) des zweiten Bereichs (2.2) abweicht.Slip ring brush, comprising a holder (1) and a brush element (2), which has three areas (2.1, 2.2, 2.3), wherein the brush element (2) in the first area (2.1) is connected to the holder (1), in the second region (2.2), which is predetermined for contacting with a slip ring (3.1), has a cross-sectional geometry (Q 2 ) with a cross-sectional area (A), in the third region (2.3) has the same cross-sectional area (A) as in the second region (2.2), and the brush element (2) is also designed in such a way that its third region (2.3) is arranged between the first region (2.1) and the second region (2.2),
characterized in that the cross-sectional geometry (Q 3 ) of the brush element (2) in the third region (2.3) is designed such that it reduces the effective spring stiffness of the brush element (2) from the cross-sectional geometry (Q 2 ) of the second region (2.2). differs. Schleifringbürste, gemäß dem Anspruch 1, dadurch gekennzeichnet, dass das Bürstenelement (2) so ausgestaltet ist, dass der dritte Bereich (2.3) näher am ersten Bereich (2.1) angeordnet ist als am zweiten Bereich (2.2).Slip ring brush, according to claim 1, characterized in that the brush element (2) is designed such that the third region (2.3) is arranged closer to the first region (2.1) than at the second region (2.2). Schleifringbürste, gemäß dem Anspruch 1 oder 2, dadurch gekennzeichnet, dass sich die wirksame Federsteifigkeit des Bürstenelements (2) auf Federbewegungen bezieht, welche eine Richtungskomponente in eine Richtung (x) aufweisen und eine Abmessung (x3) des Bürstenelements (2) im dritten Bereich (2.3) kleiner ist, als und eine Abmessung (x2) des Bürstenelements (2) im zweiten Bereich (2.2), wobei die Abmessungen (x2, x3) in der Richtung (x) orientiert sind.Slip ring brush, according to claim 1 or 2, characterized in that the effective spring stiffness of the brush element (2) refers to spring movements, which is a directional component in a direction (x) and a dimension (x 3 ) of the brush element (2) in the third region (2.3) is smaller than and a dimension (x 2 ) of the brush element (2) in the second region (2.2), wherein the Dimensions (x 2 , x 3 ) in the direction (x) are oriented. Schleifringbürste, gemäß einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Bürstenelement (2) zwei gegenüberliegende Schenkel (2a, 2b) aufweist.Slip ring brush according to one of the preceding claims, characterized in that the brush element (2) has two opposite limbs (2a, 2b). Schleifringbürste, gemäß dem Anspruch 4, dadurch gekennzeichnet, dass das Bürstenelement (2) jeweils einen zweiten Bereich (2.2) an den zwei gegenüberliegenden Schenkeln (2a, 2b) aufweist.Slip ring brush, according to claim 4, characterized in that the brush element (2) each have a second region (2.2) on the two opposite legs (2a, 2b). Schleifringbürste, gemäß dem Anspruch 5, dadurch gekennzeichnet, dass zumindest einer der gegenüberliegenden Schenkel (2a, 2b) des Bürstenelements (2) den dritten Bereich (2.3) aufweist, wobei durch Federbewegungen des Bürstenelements (2) innerhalb einer Ebene (E), eine Bewegung des zweiten Bereiches (2.2) in eine Richtung (x) parallel zu dieser Ebene (E) erfolgt, und eine Abmessung (x3) des Bürstenelements (2) im dritten Bereich (2.3) kleiner ist als eine Abmessung (x2) des Bürstenelements (2) im zweiten Bereich (2.2), wobei die Abmessungen (x2, x3) in der Richtung (x) orientiert sind.Slip ring brush, according to claim 5, characterized in that at least one of the opposite legs (2a, 2b) of the brush element (2) has the third region (2.3), wherein by spring movements of the brush element (2) within a plane (E), a Movement of the second region (2.2) in a direction (x) parallel to this plane (E), and a dimension (x 3 ) of the brush element (2) in the third region (2.3) is smaller than a dimension (x 2 ) of the Brush element (2) in the second region (2.2), wherein the dimensions (x 2 , x 3 ) in the direction (x) are oriented. Schleifringbürste, gemäß einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Bürstenelement (2) im zweiten Bereich (2.2) eine kreisförmige Querschnittsgeometrie (Q2) aufweist, und die Querschnittsgeometrie (Q3) des Bürstenelements (2) im dritten Bereich (2.3) so ausgestaltet ist, dass diese von einer Kreisform abweicht.Slip ring brush according to one of the preceding claims, characterized in that the brush element (2) in the second region (2.2) has a circular cross-sectional geometry (Q 2 ), and the cross-sectional geometry (Q 3 ) of the brush element (2) in the third region (2.3) is designed so that it deviates from a circular shape. Schleifringbürste, gemäß dem Anspruch 7, dadurch gekennzeichnet, dass sich die wirksame Federsteifigkeit des Bürstenelements (2) auf Federbewegungen bezieht, welche eine Richtungskomponente in eine Richtung (x) aufweisen, und in der Richtung (x) eine Abmessung (x3) des Bürstenelements (2) im dritten Bereich (2.3) kleiner ist, als der Durchmesser (d) des Bürstenelements (2) im zweiten Bereich (2.2).Slip ring brush according to claim 7, characterized in that the effective spring rigidity of the brush element (2) relates to spring movements having a directional component in one direction (x) and in the direction (x) one dimension (x 3 ) of the brush element (2) in the third region (2.3) is smaller than the diameter (d) of the brush element (2) in the second region (2.2). Schleifringeinheit, bestehend aus einem Schleifring (3.1), einem Halter (1) und einem Bürstenelement (2), welches drei Bereiche (2.1, 2.2, 2.3) aufweist, und das Bürstenelement (2) und der Schleifring (3.1) um eine Drehachse (Y) relativ zueinander drehbar sind, wobei das Bürstenelement (2) - im ersten Bereich (2.1) mit dem Halter (1) verbunden ist, - im zweiten Bereich (2.2) eine Querschnittsgeometrie (Q2) mit einer Querschnittsfläche (A) aufweist und weiterhin im zweiten Bereich (2.2) in Kontakt mit dem Schleifring (3.1) ist, und - im dritten Bereich (2.3) die gleiche Querschnittsfläche (A) aufweist, wie im zweiten Bereich (2.2), und das Bürstenelement (2) zudem derart ausgestaltet ist, dass dessen dritter Bereich (2.3), zwischen dem ersten Bereich (2.1) und dem zweiten Bereich (2.2) angeordnet ist,
dadurch gekennzeichnet, dass die Querschnittsgeometrie (Q3) des Bürstenelements (2) im dritten Bereich (2.3) so ausgestaltet ist, dass diese zur Reduzierung der wirksamen Federsteifigkeit des Bürstenelements (2) von der Querschnittsgeometrie (Q2) des zweiten Bereichs (2.2) abweicht.Slip ring unit, comprising a slip ring (3.1), a holder (1) and a brush element (2), which has three areas (2.1, 2.2, 2.3), and the brush element (2) and the slip ring (3.1) about a rotation axis ( Y) are rotatable relative to each other, wherein the brush element (2) in the first area (2.1) is connected to the holder (1), - In the second region (2.2) has a cross-sectional geometry (Q 2 ) with a cross-sectional area (A) and further in the second region (2.2) in contact with the slip ring (3.1), and in the third region (2.3) has the same cross-sectional area (A) as in the second region (2.2), and the brush element (2) is also designed in such a way that its third region (2.3) is arranged between the first region (2.1) and the second region (2.2),
characterized in that the cross-sectional geometry (Q 3 ) of the brush element (2) in the third region (2.3) is designed such that it reduces the effective spring stiffness of the brush element (2) from the cross-sectional geometry (Q 2 ) of the second region (2.2). differs. Schleifringeinheit, gemäß dem Anspruch 9, dadurch gekennzeichnet, dass eine Abmessung (y3) der Querschnittsgeometrie (Q3) des Bürstenelements (2) im dritten Bereich (2.3) größer ist als eine Abmessung (y2) der Querschnittsgeometrie (Q2) des Bürstenelements (2) im zweiten Bereich (2.2), wobei die Abmessungen (y2, y3) jeweils in einer Richtung (y) mit einer Richtungskomponente parallel zur Drehachse (Y) orientiert sind.Slip ring unit according to claim 9, characterized in that a dimension (y 3 ) of the cross-sectional geometry (Q 3 ) of the brush element (2) in the third region (2.3) is greater than a dimension (y 2 ) of the cross-sectional geometry (Q 2 ) of Brush element (2) in the second region (2.2), wherein the dimensions (y 2 , y 3 ) in each case in a direction (y) with a direction component parallel to the axis of rotation (Y) are oriented. Schleifringeinheit, gemäß dem Anspruch 9 oder 10, dadurch gekennzeichnet, dass in der Querschnittsgeometrie (Q3) des dritten Bereichs (2.3) des Bürstenelements (2) eine Abmessung (x3) kleiner ist als die dazu orthogonale die Abmessung (y3), die in einer Richtung (y) mit einer Richtungskomponente parallel zur Drehachse (Y) orientiert ist.Slip ring unit according to claim 9 or 10, characterized in that in the cross-sectional geometry (Q 3 ) of the third region (2.3) of the brush element (2) has a dimension (x 3 ) is smaller than the orthogonal to the dimension (y 3 ), which is oriented in a direction (y) with a directional component parallel to the axis of rotation (Y). Schleifringeinheit, gemäß einem der Ansprüche 9 bis 11, dadurch gekennzeichnet, dass das Bürstenelement (2) so ausgestaltet ist, dass der dritte Bereich (2.3) näher am ersten Bereich (2.1) angeordnet ist als am zweiten Bereich (2.2).Slip ring unit according to one of claims 9 to 11, characterized in that the brush element (2) is designed so that the third region (2.3) is arranged closer to the first region (2.1) than at the second region (2.2). Schleifringeinheit, gemäß einem der Ansprüche 9 bis 12, dadurch gekennzeichnet, dass sich die wirksame Federsteifigkeit des Bürstenelements (2) auf Federbewegungen bezieht, welche eine Richtungskomponente in eine Richtung (x) - orthogonal zur Drehachse (Y) - aufweisen, und eine Abmessung (x3) des Bürstenelements (2) im dritten Bereich (2.3) kleiner ist als eine Abmessung (x2) des Bürstenelements (2) im zweiten Bereich (2.2), wobei die Abmessungen (x2, x3) in der Richtung (x) orientiert sind.Slip ring unit according to one of Claims 9 to 12, characterized in that the effective spring rigidity of the brush element (2) relates to spring movements which have a directional component in a direction (x) - orthogonal to the axis of rotation (Y) - and a dimension ( x 3 ) of the brush element (2) in the third region (2.3) is smaller than a dimension (x 2 ) of the brush element (2) in the second region (2.2), wherein the dimensions (x 2 , x 3 ) in the direction (x ) are oriented. Schleifringeinheit, gemäß einem der Ansprüche 9 bis 13, dadurch gekennzeichnet, dass das Bürstenelement (2) zwei gegenüberliegende Schenkel (2a, 2b) aufweist.Slip ring unit according to one of claims 9 to 13, characterized in that the brush element (2) has two opposite legs (2a, 2b). Schleifringeinheit, gemäß dem Anspruch 14, dadurch gekennzeichnet, dass das Bürstenelement (2) jeweils einen zweiten Bereich (2.2) an den zwei gegenüberliegenden Schenkeln (2a, 2b) aufweist.Slip ring unit, according to claim 14, characterized in that the brush element (2) each have a second region (2.2) on the two opposite legs (2a, 2b). Schleifringeinheit, gemäß einem der Ansprüche 14 oder 15, dadurch gekennzeichnet, dass zumindest einer der gegenüberliegenden Schenkel (2a, 2b) des Bürstenelements (2) den dritten Bereich (2.3) aufweist, wobei durch Federbewegungen des Bürstenelements (2) innerhalb einer Ebene (E), eine Bewegung des zweiten Bereiches (2.2) in eine Richtung (x) parallel zu dieser Ebene (E) erfolgt, und eine Abmessung (x3) des Bürstenelements (2) im dritten Bereich (2.3) kleiner ist als eine Abmessung (x2) des Bürstenelements (2) im zweiten Bereich (2.2), wobei die Abmessungen (x2, x3) in der Richtung (x) orientiert sind.Slip ring unit according to one of claims 14 or 15, characterized in that at least one of the opposite legs (2a, 2b) of the brush element (2) has the third region (2.3), wherein spring movements of the brush element (2) within a plane (E ), a movement of the second region (2.2) in a direction (x) parallel to this plane (E), and a dimension (x 3 ) of the brush element (2) in the third region (2.3) is smaller than a dimension (x 2 ) of the brush element (2) in the second region (2.2), the dimensions (x 2 , x 3 ) being oriented in the direction (x). Schleifringeinheit, gemäß einem der Ansprüche 9 bis 16, dadurch gekennzeichnet, dass eine Abmessung (y3) des Bürstenelements (2) im dritten Bereich (2.3) in einer Richtung (y) mit einer Richtungskomponente parallel zur Drehachse (Y) größer ist als eine Abmessung (x3) im dritten Bereich (2.3), welche orthogonal zur Richtung (y) ausgerichtet ist.Slip ring unit according to one of claims 9 to 16, characterized in that a dimension (y 3 ) of the brush element (2) in the third region (2.3) in a direction (y) with a directional component parallel to the axis of rotation (Y) is greater than a dimension (x 3 ) in the third region (2.3), which is aligned orthogonal to the direction (y). Schleifringeinheit, gemäß einem der Ansprüche 9 bis 17, dadurch gekennzeichnet, dass der Schleifring (3.1) eine umlaufende Nut (3.11) aufweist und der zweite Bereich (2.2) des Bürstenelements (2) in der Nut (3.11) anliegt.Slip ring unit according to one of claims 9 to 17, characterized in that the slip ring (3.1) has a circumferential groove (3.11) and the second region (2.2) of the brush element (2) in the groove (3.11). Schleifringeinheit, gemäß dem Anspruch 18, dadurch gekennzeichnet, dass die Nut (3.11) eine V-förmige Geometrie aufweist.Slip ring unit according to claim 18, characterized in that the groove (3.11) has a V-shaped geometry. Schleifringeinheit, gemäß einem der Ansprüche 9 bis 19, dadurch gekennzeichnet, dass das Bürstenelement (2) im zweiten Bereich (2.2) eine kreisförmige Querschnittsgeometrie (Q2) aufweist, und die Querschnittsgeometrie (Q3) des Bürstenelements (2) im dritten Bereich (2.3) so ausgestaltet ist, dass diese von einer Kreisform abweicht.Slip ring unit according to one of claims 9 to 19, characterized in that the brush element (2) in the second region (2.2) has a circular cross-sectional geometry (Q 2 ), and the cross-sectional geometry (Q 3 ) of the brush element (2) in the third region ( 2.3) is designed so that it deviates from a circular shape.
EP06021459A 2006-01-17 2006-10-13 Slip ring brush and slip ring device containing it Active EP1808941B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102006002104A DE102006002104A1 (en) 2006-01-17 2006-01-17 Slip ring brush and slip ring unit equipped with it

Publications (2)

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EP1808941A1 true EP1808941A1 (en) 2007-07-18
EP1808941B1 EP1808941B1 (en) 2008-09-03

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US (1) US7719158B2 (en)
EP (1) EP1808941B1 (en)
CN (1) CN101005185B (en)
AT (1) ATE407466T1 (en)
DE (2) DE102006002104A1 (en)

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Also Published As

Publication number Publication date
CN101005185B (en) 2011-08-31
EP1808941B1 (en) 2008-09-03
DE102006002104A1 (en) 2007-07-19
US20070167032A1 (en) 2007-07-19
US7719158B2 (en) 2010-05-18
ATE407466T1 (en) 2008-09-15
CN101005185A (en) 2007-07-25
DE502006001487D1 (en) 2008-10-16

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