EP1754892A1 - Fan casing - Google Patents

Fan casing Download PDF

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Publication number
EP1754892A1
EP1754892A1 EP06010905A EP06010905A EP1754892A1 EP 1754892 A1 EP1754892 A1 EP 1754892A1 EP 06010905 A EP06010905 A EP 06010905A EP 06010905 A EP06010905 A EP 06010905A EP 1754892 A1 EP1754892 A1 EP 1754892A1
Authority
EP
European Patent Office
Prior art keywords
fan
electrical line
fan according
housing
motor
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
EP06010905A
Other languages
German (de)
French (fr)
Other versions
EP1754892B1 (en
Inventor
Armin Fleig
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.)
Ebm Papst St Georgen GmbH and Co KG
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Ebm Papst St Georgen GmbH and Co KG
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Publication of EP1754892A1 publication Critical patent/EP1754892A1/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/06—Units comprising pumps and their driving means the pump being electrically driven
    • F04D25/0606—Units comprising pumps and their driving means the pump being electrically driven the electric motor being specially adapted for integration in the pump
    • F04D25/0613—Units comprising pumps and their driving means the pump being electrically driven the electric motor being specially adapted for integration in the pump the electric motor being of the inside-out type, i.e. the rotor is arranged radially outside a central stator
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/06—Units comprising pumps and their driving means the pump being electrically driven
    • F04D25/0693—Details or arrangements of the wiring
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/52—Casings; Connections of working fluid for axial pumps
    • F04D29/522—Casings; Connections of working fluid for axial pumps especially adapted for elastic fluid pumps
    • F04D29/526—Details of the casing section radially opposing blade tips

Definitions

  • the invention relates to a fan, in particular a device fan, with a fan housing and a motor for driving fan blades, which are rotatably disposed in an air passage opening provided in the fan, and with an electrical connection, which leads from the motor to a housing part and at least one electrical line which is usually in the form of a stranded wire.
  • the WO 2004/046 557 shows a fan housing with a radial extension, in which a recess is provided, to which an electrical lead from a motor, which is arranged in the fan housing.
  • a latchable retaining member In this recess a latchable retaining member is inserted and locked there. In the latched state, it deflects the electrical line at two points by a predetermined minimum angle and thereby causes a strain relief on the side of the electrical line leading to the motor.
  • this holding member is achieved that a flexible line before mounting the support member in a simple manner can be inserted into recesses provided for this, so does not need to be threaded, and that the line is deflected only by the insertion of the support member.
  • a so fixed line can be removed from the strain relief, that you either remove the support member again, or that the flexible line, if it is not provided with a connector, ausfädelt over its entire length from the deflections.
  • this object is achieved by the subject matter of claim 1.
  • a flexible conduit can be hung in a simple and convenient way, the conduit being held in the strain relief device and a secure Strain relief is achieved.
  • a so fixed line can be removed only after they are hooked out of the strain relief, that they hang over their entire length from the deflections, or they threaded out.
  • Fig. 1 shows a three-dimensional view of a device fan 20, which is shown here as an axial fan.
  • the invention is not limited to axial fans. Rather, it can be used in the same way with other types of fans, for example in diagonal and radial fans.
  • the fan 20 has a fan housing 22, which has approximately the shape of a circular cylindrical tube 24, at its lower end in Fig. 1, a mounting flange 26 and at its upper end a mounting flange 28 are provided.
  • the flow direction 25 of the air is defined by an inflow side and an outflow side.
  • FIG. 1 shows at the top the outflow side designated 34.
  • the fan 20 has a motor 21 for driving fan blades 40 (FIG. 3), which are rotatably arranged in an air passage opening 41 about a rotation axis 23.
  • the wings 40 rotate in operation in the direction of an arrow 27.
  • the shape of the fan blades 40 is adapted to the shape of the inside of the tube 24.
  • the motor 21 is preferably an electronically commutated external rotor motor in which the vanes 40 are mounted on the outer rotor.
  • a mounting flange 44 For mounting the motor 21 in the fan housing 22 is a mounting flange 44, which is connected via webs 46 with the fan housing 22.
  • the webs 46 are preferably formed integrally with the mounting flange 44 and the housing 22.
  • the flange 44 is a bearing tube 48, on which the motor 21 is fixed in a known manner.
  • a flexible electrical connection line 52 of the motor 21 which is e.g. can be designed as a multi-wire line. It is soldered to a (not shown) printed circuit board of the motor 21 and is led from there to the outside to the fan housing 22, wherein a strain relief device 50 is provided for the line 52, as will be described below.
  • the conduit 52 usually includes a plurality of flexible insulated wires, preferably so-called strands, each of which is composed of a plurality of thin wires which are enveloped by an insulating material.
  • a fan requires two thick wires to supply an operating voltage. In many cases, thinner lines are provided, eg for a tachometer or an alarm signal. All of these flexible cables must be in the Mounting quickly and above all securely fastened, and this is described below.
  • the fan housing 22 seen in the direction of the axis of rotation 23, an approximately square outline with four corners 64, at which recesses 62 are provided for mounting the fan 20.
  • the strain relief device 50 is located. This can be arranged at any desired location of the fan housing 22, but the corners 64 are particularly well suited for this purpose.
  • the device 50 is preferably formed integrally with the fan housing 22 and serves to cause a strain relief for the leading to the motor 21 side of the line 52 by deflecting the line 52 at least two deflection points and in at least two planes running at a predetermined angle to each other. Details of the strain relief device 50 are shown in great detail particularly in FIGS. 2, 4 and 5, so that a description in words would be dispensable for the skilled person.
  • Fig. 1 and Fig. 2 show how the conduit 52 exits from the recess 49 of the mounting flange 44 and is guided in a web 51 which is disposed between the motor 21 and the fan housing 22 and provided with a guide groove 53, in which Line 52 is guided from the region of the motor 21 to an adjacent to the region of the extension 64 lateral boundary surface 29 of the fan housing 22.
  • a first hold-down device 54 In order to prevent the line 52 from sliding out of the guide channel 53, it is prevented from sliding out there by a first hold-down device 54. This extends only so far that it still allows a lateral insertion of the line 52 into the channel 53, which accelerates the assembly accordingly.
  • the channel 53 continues in the region of the corner 64 in a channel 56 (Fig. 2), which is generally approximately in the radial direction and is shown radially open to the outside, which facilitates the attachment of the strands 52.
  • a second hold-down 57 which comes in Fig. 2 from the left
  • a third hold-down 58 which comes in Fig. 2 from the right.
  • the hold-downs 57, 58 form between them a narrow gap 59, through which the strands 52 can be inserted.
  • the gap 59 extends at an angle to the channel 56, as shown in FIG. 2 clearly seen. In this way it is achieved that the line 52 can not free itself from the channel 56.
  • the hold-downs 57 and 58 overlap in their effect.
  • FIG. 5 shows particularly clearly, there is a relatively sharp deflection edge 55 below the third hold-down 58, which may have a radius of 0.5 mm, for example, and around which the line 52 in FIG. 4 is deflected approximately in the opposite direction. This deflection takes place approximately in a plane which is perpendicular to the axis of rotation 23, as Figs. 2, 4 and 5 clearly show.
  • the deflection angle is shown in FIG. 4 more than 120 ° and preferably about 180 °. Naturally, this angle can be varied within wide limits.
  • the channel 56 has at its radially outer end an inclined wall 63, which merges as shown in FIG. 2 down into a stiffening wall 70.
  • a stiffening wall 72 Parallel to the wall 70 and at a distance from it extends a stiffening wall 72, which merges upward over an inclined wall 74 in the upper flange 28.
  • the stiffening walls 70, 72 extend between the flanges 26 and 28.
  • the inclined walls 63, 74 (and corresponding oblique walls on the lower flange 26) direct the force from a (not shown) fixing screw directly from the screw during assembly of the fan. Support surface 76 in the ribs 70, 72 and thereby allow a doubling of the tightening torque of the screw in question and thus a particularly secure attachment of such a fan 20th
  • a guide channel 78 extends on the lower side of the deflecting edge 55 in FIG. 4 and is bounded on the outside by a wall section 80. Through this guide channel 78, the conduit 52 extends to a second deflection point 82, at which the conduit 52 is deflected in a direction which extends approximately parallel to the axis of rotation 23. This deflection is clearly shown in Fig.
  • the line 52 extends there from the upper flange 28 through an opening 84 thereof to an opening 86 (Fig. 2) of the lower flange 26.
  • the line 52 extends over a projecting, relatively sharp-edged rib 88, which from the stiffening wall 70 to the outer Peripheral of the section 24 extends, and approximately perpendicular to the axis of rotation 23 extends.
  • the rib 88 causes a slight deflection of the conduit 52.
  • the reason is as follows. As shown in Fig. 2, when a force F1 is applied to the conduit 52, this would in itself cause the conduit 52 to move in the direction of the force arrow F2 in the region of the groove 53 cause.
  • the rib 88 By the rib 88, the force F2 is reduced, and the two hold-downs 57 and 58 prevent the line 52 from jumping out of the groove 53 and the groove 56 due to the force F2.
  • the opening 84 is, as shown in Fig. 4, accessible via an arcuate Ein von Anlagen réelle 90 (in the flange 28) from the outside, so that through this opening 90, the strands 52 can be hung, but can not hang themselves again. This is supported by the rib 88.
  • the opening 86 (FIG. 2) in the lower flange 26 is accessible from outside via an approximately spiral-shaped channel 92, so that the strands 52 can be easily suspended by this channel 92, but unintentional unhooking of the strands, ie a so-called self-emptying, takes place the rib 88 is prevented.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

The fan has a bar (51) extending transverse to an air passage opening and designed according to the type of a groove, which serves for receiving an electrical line. A cord grip device (50) is formed partially in the area of the preset position of the fan casing. The cord grip device is provided for securing the cord grip in favor to a side of the electrical line guiding to a motor by diverting the electrical line at two diverting positions and two levels running under a preset angle to each other. An opening in a lower fixation flange is accessible from outside via a spiral shaped channel.

Description

Die Erfindung betrifft einen Lüfter, insbesondere einen Gerätelüfter, mit einem Lüftergehäuse und einem Motor zum Antrieb von Lüfterflügeln, welche in einer im Lüfter vorgesehenen Luftdurchtrittsöffnung drehbar angeordnet sind, und mit einer elektrischen Verbindung, welche vom Motor zu einem Gehäuseteil führt und mindestens eine elektrische Leitung aufweist, die gewöhnlich die Form einer Litze hat..The invention relates to a fan, in particular a device fan, with a fan housing and a motor for driving fan blades, which are rotatably disposed in an air passage opening provided in the fan, and with an electrical connection, which leads from the motor to a housing part and at least one electrical line which is usually in the form of a stranded wire.

Bei derartigen Leitungen muss eine sogenannte Zugentlastung vorgesehen werden. Solche Leitungen werden nämlich gewöhnlich an einer Leiterplatte des Motors angelötet, und diese Lötverbindung ist nicht dauerhaft belastbar und kann durch mechanischen Zug beschädigt oder zerstört werden, weshalb ein solcher mechanischer Zug gestoppt werden muss, bevor er die Leiterplatte erreicht.In such lines, a so-called strain relief must be provided. In fact, such leads are usually soldered to a printed circuit board of the motor, and this solder joint is not permanently resilient and may be damaged or destroyed by mechanical drag, and such a mechanical pull must be stopped before it reaches the printed circuit board.

Die WO 2004/046 557 zeigt ein Lüftergehäuse mit einer radialen Erweiterung, in der eine Ausnehmung vorgesehen ist, zu welcher eine elektrische Leitung von einem Motor führt, der in dem Lüftergehäuse angeordnet ist. In diese Ausnehmung wird ein verrastbares Halteglied eingeführt und dort verrastet. Im verrasteten Zustand lenkt es die elektrische Leitung an zwei Stellen um einen vorgegebenen Mindestwinkel um und bewirkt dadurch auf der zum Motor führenden Seite der elektrischen Leitung eine Zugentlastung. Durch Verwendung dieses Halteglieds wird erreicht, dass eine biegsame Leitung vor der Montage des Halteglieds in einfacher Weise in hierfür vorgesehene Ausnehmungen eingelegt werden kann, also nicht eingefädelt zu werden braucht, und dass die Leitung erst durch das Einführen des Halteglieds umgelenkt wird. Eine so fixierte Leitung kann dadurch aus der Zugentlastung entfernt werden, dass man entweder das Halteglied wieder entfernt, oder dass man die flexible Leitung, sofern sie nicht mit einem Anschlussstecker versehen ist, über ihre ganze Länge aus den Umlenkungen ausfädelt.The WO 2004/046 557 shows a fan housing with a radial extension, in which a recess is provided, to which an electrical lead from a motor, which is arranged in the fan housing. In this recess a latchable retaining member is inserted and locked there. In the latched state, it deflects the electrical line at two points by a predetermined minimum angle and thereby causes a strain relief on the side of the electrical line leading to the motor. By using this holding member is achieved that a flexible line before mounting the support member in a simple manner can be inserted into recesses provided for this, so does not need to be threaded, and that the line is deflected only by the insertion of the support member. A so fixed line can be removed from the strain relief, that you either remove the support member again, or that the flexible line, if it is not provided with a connector, ausfädelt over its entire length from the deflections.

Es ist eine Aufgabe der Erfindung, einen neuen Lüfter bereit zu stellen.It is an object of the invention to provide a new fan.

Nach der Erfindung wird diese Aufgabe gelöst durch den Gegenstand des Anspruchs 1. So erreicht man, dass eine flexible Leitung auf einfache und bequeme Art eingehängt werden kann, wobei die Leitung in der Zugentlastungsvorrichtung festgehalten und eine sichere Zugentlastung erreicht wird. Eine so fixierte Leitung kann nach ihrem Einhängen nur dadurch wieder aus der Zugentlastung entfernt werden, dass man sie über ihre ganze Länge aus den Umlenkungen aushängt, oder sie ausfädelt.According to the invention, this object is achieved by the subject matter of claim 1. Thus, one achieves that a flexible conduit can be hung in a simple and convenient way, the conduit being held in the strain relief device and a secure Strain relief is achieved. A so fixed line can be removed only after they are hooked out of the strain relief, that they hang over their entire length from the deflections, or they threaded out.

Bevorzugte Weiterbildungen eines erfindungsgemäßen Lüfters sind Gegenstand von Unteransprüchen.Preferred developments of a fan according to the invention are the subject of dependent claims.

Weitere Einzelheiten und vorteilhafte Weiterbildungen der Erfindung ergeben sich aus den im Folgenden beschriebenen und in der Zeichnung dargestellten, in keiner Weise als Einschränkung der Erfindung zu verstehenden Ausführungsbeispielen. Es zeigt:

Fig. 1
eine perspektivische Darstellung eines erfindungsgemäßen Lüfters; der Motor ist nur schematisch angedeutet, und die Lüfterflügel sind in Fig. 1 nicht dargestellt; ein solcher Flügel 40 ist in Fig. 3 strichpunktiert angedeutet,
Fig. 2
eine vergrößerte Darstellung des in Fig. 1 vorderen Ecks des Lüfters,
Fig. 3
eine Draufsicht von oben auf den Lüfter der Fig. 1, gesehen in Richtung des Pfeiles III der Fig. 1,
Fig. 4
eine vergrößerte Darstellung des Ecks, das in Fig. 3 unten links dargestellt ist,
Fig. 5
eine vergrößerte Darstellung einer Einzelheit, gesehen etwa in Richtung des Pfeiles V der Fig. 2,
Fig. 6
eine raumbildliche Darstellung, gesehen etwa in Richtung des Pfeiles VI der Fig. 1,
Fig. 7
eine Seitenansicht, gesehen in Richtung des Pfeiles VII der Fig. 1, und
Fig. 8
einen Schnitt, gesehen längs der Linie VIII-VIII der Fig. 1.
Further details and advantageous developments of the invention will become apparent from the embodiments described below and illustrated in the drawings, in no way as a limitation of the invention. It shows:
Fig. 1
a perspective view of a fan according to the invention; the engine is indicated only schematically, and the fan blades are not shown in Figure 1; such a wing 40 is indicated in phantom in Fig. 3,
Fig. 2
an enlarged view of the front in Fig. 1 corner of the fan,
Fig. 3
1 is a plan view from above of the fan of FIG. 1, seen in the direction of the arrow III of FIG. 1,
Fig. 4
an enlarged view of the corner, which is shown in Fig. 3 bottom left,
Fig. 5
an enlarged view of a detail, as seen in the direction of arrow V of Fig. 2,
Fig. 6
a three-dimensional view, as seen in the direction of the arrow VI of FIG. 1,
Fig. 7
a side view, as seen in the direction of arrow VII of Fig. 1, and
Fig. 8
a section, taken along the line VIII-VIII of FIG. 1.

In der nachfolgenden Beschreibung beziehen sich die Begriffe links, rechts, oben, unten auf die jeweilige Zeichnungsfigur. Gleiche oder gleich wirkende Teile werden in den verschiedenen Figuren mit denselben Bezugszeichen bezeichnet und gewöhnlich nur einmal beschrieben.In the following description, the terms left, right, up, down refer to the respective drawing figure. Identical or equivalent parts are denoted by the same reference numerals in the various figures and usually described only once.

Fig. 1 zeigt eine raumbildliche Darstellung eines Gerätelüfters 20, welcher hier als Axiallüfter dargestellt ist. Die Erfindung ist jedoch nicht auf Axiallüfter, beschränkt. Vielmehr kann sie in gleicher Weise bei anderen Lüftertypen verwendet werden, z.B. bei Diagonal- und Radiallüftern. Fig. 1 shows a three-dimensional view of a device fan 20, which is shown here as an axial fan. However, the invention is not limited to axial fans. Rather, it can be used in the same way with other types of fans, for example in diagonal and radial fans.

Der Lüfter 20 hat ein Lüftergehäuse 22, welches etwa die Form eines kreiszylindrischen Rohres 24 hat, an dessen in Fig. 1 unterem Ende ein Befestigungsflansch 26 und an dessen oberem Ende ein Befestigungsflansch 28 vorgesehen sind. Die Durchströmrichtung 25 der Luft wird durch eine Einströmseite und eine Ausströmseite definiert. Fig. 1 zeigt oben die mit 34 bezeichnete Ausströmseite.The fan 20 has a fan housing 22, which has approximately the shape of a circular cylindrical tube 24, at its lower end in Fig. 1, a mounting flange 26 and at its upper end a mounting flange 28 are provided. The flow direction 25 of the air is defined by an inflow side and an outflow side. FIG. 1 shows at the top the outflow side designated 34.

Der Lüfter 20 hat einen Motor 21 zum Antrieb von Lüfterflügeln 40 (Fig. 3), welche in einer Luftdurchtrittsöffnung 41 um eine Drehachse 23 drehbar angeordnet sind. Die Flügel 40 drehen sich im Betrieb in Richtung eines Pfeils 27. Die Form der Lüfterflügel 40 ist an die Form der Innenseite des Rohres 24 angepasst. Der Motor 21 ist bevorzugt ein elektronisch kommutierter Außenläufermotor, bei dem die Flügel 40 auf dem Außenrotor angebracht sind.The fan 20 has a motor 21 for driving fan blades 40 (FIG. 3), which are rotatably arranged in an air passage opening 41 about a rotation axis 23. The wings 40 rotate in operation in the direction of an arrow 27. The shape of the fan blades 40 is adapted to the shape of the inside of the tube 24. The motor 21 is preferably an electronically commutated external rotor motor in which the vanes 40 are mounted on the outer rotor.

Zur Montage des Motors 21 im Lüftergehäuse 22 dient ein Befestigungsflansch 44, der über Stege 46 mit dem Lüftergehäuse 22 verbunden ist. Die Stege 46 sind bevorzugt einstückig mit dem Befestigungsflansch 44 und dem Gehäuse 22 ausgebildet. Am Flansch 44 befindet sich ein Lagerrohr 48, auf dem der Motor 21 in bekannter Weise befestigt wird.For mounting the motor 21 in the fan housing 22 is a mounting flange 44, which is connected via webs 46 with the fan housing 22. The webs 46 are preferably formed integrally with the mounting flange 44 and the housing 22. The flange 44 is a bearing tube 48, on which the motor 21 is fixed in a known manner.

Durch eine seitliche Aussparung 49 des Flanschs 44 erstreckt sich eine flexible elektrische Anschlussleitung 52 des Motors 21, die z.B. als mehradrige Leitung ausgebildet sein kann. Sie ist an einer (nicht dargestellten) Leiterplatte des Motors 21 angelötet und wird von dort nach außen zum Lüftergehäuse 22 geführt, wobei eine Zugentlastungsvorrichtung 50 für die Leitung 52 vorgesehen ist, wie das nachfolgend beschrieben wird.Through a lateral recess 49 of the flange 44 extends a flexible electrical connection line 52 of the motor 21, which is e.g. can be designed as a multi-wire line. It is soldered to a (not shown) printed circuit board of the motor 21 and is led from there to the outside to the fan housing 22, wherein a strain relief device 50 is provided for the line 52, as will be described below.

Die Leitung 52 enthält gewöhnlich mehrere flexible isolierte Leitungen, bevorzugt sogenannte Litzen, von denen jede aus einer Mehrzahl dünner Drähte zusammen gesetzt ist, die von einem isolierenden Material umhüllt sind. Ein Lüfter benötigt zwei dicke Leitungen zum Zuführen einer Betriebsspannung. Vielfach sind auch dünnere Leitungen vorgesehen, z.B. für ein Tacho- oder ein Alarmsignal. Alle diese flexiblen Leitungen müssen bei der Montage schnell und vor allem sicher befestigt werden, und dies wird nachfolgend beschrieben.The conduit 52 usually includes a plurality of flexible insulated wires, preferably so-called strands, each of which is composed of a plurality of thin wires which are enveloped by an insulating material. A fan requires two thick wires to supply an operating voltage. In many cases, thinner lines are provided, eg for a tachometer or an alarm signal. All of these flexible cables must be in the Mounting quickly and above all securely fastened, and this is described below.

Wie Fig. 1 und Fig. 3 zeigen, hat das Lüftergehäuse 22, gesehen in Richtung der Drehachse 23, einen etwa quadratischen Umriss mit vier Ecken 64, an denen Ausnehmungen 62 zur Befestigung des Lüfters 20 vorgesehen sind.As shown in FIG. 1 and FIG. 3 , the fan housing 22, seen in the direction of the axis of rotation 23, an approximately square outline with four corners 64, at which recesses 62 are provided for mounting the fan 20.

Im Bereich des in Fig. 1 vorderen Ecks 64 befindet sich die Zugentlastungsvorrichtung 50. Diese kann an jeder beliebigen Stelle des Lüftergehäuses 22 angeordnet werden, doch eignen sich die Ecken 64 hierfür besonders gut. Die Vorrichtung 50 ist bevorzugt einstückig mit dem Lüftergehäuse 22 ausgebildet und dient dazu, durch Umlenken der Leitung 52 an wenigstens zwei Umlenkstellen und in mindestens zwei unter einem vorgegebenen Winkel zueinander verlaufenden Ebenen eine Zugentlastung für die zum Motor 21 führende Seite der Leitung 52 zu bewirken. Einzelheiten der Zugentlastungsvorrichtung 50 sind besonders in den Fig. 2, 4 und 5 sehr ausführlich dargestellt, so dass eine Beschreibung mit Worten für den Fachmann entbehrlich wäre.In the region of the front corner 64 in FIG. 1, the strain relief device 50 is located. This can be arranged at any desired location of the fan housing 22, but the corners 64 are particularly well suited for this purpose. The device 50 is preferably formed integrally with the fan housing 22 and serves to cause a strain relief for the leading to the motor 21 side of the line 52 by deflecting the line 52 at least two deflection points and in at least two planes running at a predetermined angle to each other. Details of the strain relief device 50 are shown in great detail particularly in FIGS. 2, 4 and 5, so that a description in words would be dispensable for the skilled person.

Fig. 1 und Fig. 2 zeigen, wie die Leitung 52 aus der Aussparung 49 des Befestigungsflanschs 44 austritt und in einem Steg 51 geführt ist, der zwischen dem Motor 21 und dem Lüftergehäuse 22 angeordnet und mit einer Führungsrinne 53 versehen ist, in welcher die Leitung 52 von dem Bereich des Motors 21 zu einer an den Bereich der Erweiterung 64 angrenzenden seitlichen Begrenzungsfläche 29 des Lüftergehäuses 22 geführt wird. Um ein Herausgleiten der Leitung 52 aus der Führungsrinne 53 zu verhindern, wird diese dort von einem ersten Niederhalter 54 am Herausgleiten gehindert. Dieser erstreckt sich nur so weit, dass er noch ein seitliches Einführen der Leitung 52 in die Rinne 53 ermöglicht, was die Montage entsprechend beschleunigt.Fig. 1 and Fig. 2 show how the conduit 52 exits from the recess 49 of the mounting flange 44 and is guided in a web 51 which is disposed between the motor 21 and the fan housing 22 and provided with a guide groove 53, in which Line 52 is guided from the region of the motor 21 to an adjacent to the region of the extension 64 lateral boundary surface 29 of the fan housing 22. In order to prevent the line 52 from sliding out of the guide channel 53, it is prevented from sliding out there by a first hold-down device 54. This extends only so far that it still allows a lateral insertion of the line 52 into the channel 53, which accelerates the assembly accordingly.

Die Rinne 53 setzt sich im Bereich der Ecke 64 fort in einem Kanal 56 (Fig. 2), der generell etwa in radialer Richtung verläuft und radial nach außen offen dargestellt ist, was das Einhängen der Litzen 52 erleichtert.The channel 53 continues in the region of the corner 64 in a channel 56 (Fig. 2), which is generally approximately in the radial direction and is shown radially open to the outside, which facilitates the attachment of the strands 52.

Etwa quer zum Kanal 56 erstrecken sich ein zweiter Niederhalter 57, der in Fig. 2 von links kommt, und ein dritter Niederhalter 58, der in Fig. 2 von rechts kommt. Die Niederhalter 57, 58 bilden zwischen sich einen schmalen Spalt 59, durch den die Litzen 52 eingelegt werden könnnen. Der Spalt 59 erstreckt sich unter einem Winkel zum Kanal 56, wie aus Fig. 2 klar ersichtlich. Auf diese Weise wird erreicht, dass sich die Leitung 52 nicht von selbst aus dem Kanal 56 befreien kann. Die Niederhalter 57 und 58 überlappen sich in ihrer Wirkung.Approximately transversely to the channel 56 extend a second hold-down 57, which comes in Fig. 2 from the left, and a third hold-down 58, which comes in Fig. 2 from the right. The hold-downs 57, 58 form between them a narrow gap 59, through which the strands 52 can be inserted. The gap 59 extends at an angle to the channel 56, as shown in FIG. 2 clearly seen. In this way it is achieved that the line 52 can not free itself from the channel 56. The hold-downs 57 and 58 overlap in their effect.

Wie Fig. 5 besonders klar zeigt, befindet sich dort unterhalb des dritten Niederhalters 58 eine relativ scharfe Umlenkkante 55, die z.B. einen Radius von 0,5 mm haben kann und um die die Leitung 52 gemäß Fig. 4 etwa in Gegenrichtung umgelenkt wird. Diese Umlenkung erfolgt etwa in einer Ebene, die senkrecht zur Drehachse 23 verläuft, wie das die Fig. 2, 4 und 5 klar zeigen. Der Umlenkwinkel beträgt gemäß Fig. 4 mehr als 120° und bevorzugt etwa 180°. Naturgemäß ist dieser Winkel in weiten Grenzen variierbar.As FIG. 5 shows particularly clearly, there is a relatively sharp deflection edge 55 below the third hold-down 58, which may have a radius of 0.5 mm, for example, and around which the line 52 in FIG. 4 is deflected approximately in the opposite direction. This deflection takes place approximately in a plane which is perpendicular to the axis of rotation 23, as Figs. 2, 4 and 5 clearly show. The deflection angle is shown in FIG. 4 more than 120 ° and preferably about 180 °. Naturally, this angle can be varied within wide limits.

Zum Erleichtern des Einführens hat der Kanal 56 an seinem radial äußeren Ende eine schräge Wand 63, die gemäß Fig. 2 nach unten in eine Versteifungswand 70 übergeht. Parallel zur Wand 70 und im Abstand von ihr erstreckt sich eine Versteifungswand 72, die nach oben über eine schräge Wand 74 in den oberen Flansch 28 übergeht. Die Versteifungswände 70, 72 erstrecken sich zwischen den Flanschen 26 und 28. Die schrägen Wände 63, 74 (und entsprechende schräge Wände am unteren Flansch 26) leiten bei der Montage des Lüfters die Kraft von einer (nicht dargestellten) Befestigungsschraube direkt von der Schrauben-Auflagefläche 76 in die Rippen 70, 72 und ermöglichen dadurch eine Verdoppelung des Anzugsmoments der betreffenden Schraube und folglich eine besonders sichere Befestigung eines solchen Lüfters 20.To facilitate insertion, the channel 56 has at its radially outer end an inclined wall 63, which merges as shown in FIG. 2 down into a stiffening wall 70. Parallel to the wall 70 and at a distance from it extends a stiffening wall 72, which merges upward over an inclined wall 74 in the upper flange 28. The stiffening walls 70, 72 extend between the flanges 26 and 28. The inclined walls 63, 74 (and corresponding oblique walls on the lower flange 26) direct the force from a (not shown) fixing screw directly from the screw during assembly of the fan. Support surface 76 in the ribs 70, 72 and thereby allow a doubling of the tightening torque of the screw in question and thus a particularly secure attachment of such a fan 20th

Das Umlenken der Leitung 52 um die scharfe Umlenkkante 55 (Fig. 5) mit ihrem kleinen Umlenkradius bewirkt dort eine erhöhte Reibung, die einer Längsverschiebung der Leitung 52 entgegen wirkt. Wie Fig. 5 zeigt, schließt die Umlenkkante 55 mit der Längsrichtung des Niederhalters 58 einen Winkel von etwa 30...50° ein. Wie Fig. 4 besonders gut zeigt, erstreckt sich auf der in Fig. 4 unteren Seite der Umlenkkante 55 ein Führungskanal 78, der nach außen hin durch einen Wandabschnitt 80 begrenzt ist. Durch diesen Führungskanal 78 erstreckt sich die Leitung 52 bis zu einer zweiten Umlenkstelle 82, an der die Leitung 52 in eine Richtung umgelenkt wird, die sich etwa parallel zur Drehachse 23 erstreckt. Diese Umlenkung ist in Fig. 8 klar dargestellt. Die Leitung 52 erstreckt sich dort vom oberen Flansch 28 durch eine Öffnung 84 desselben zu einer Öffnung 86 (Fig. 2) des unteren Flanschs 26. Dabei verläuft die Leitung 52 über eine vorspringende, relativ scharfkantige Rippe 88, welche von der Versteifungswand 70 zur äußeren Peripherie des Abschnitts 24 verläuft, und die etwa senkrecht zur Drehachse 23 verläuft.The deflection of the line 52 about the sharp deflection edge 55 (FIG. 5) with its small deflection radius causes there increased friction, which counteracts a longitudinal displacement of the line 52. As shown in FIG. 5, the deflection edge 55 encloses an angle of approximately 30... 50 ° with the longitudinal direction of the hold-down 58. As FIG. 4 shows particularly well, a guide channel 78 extends on the lower side of the deflecting edge 55 in FIG. 4 and is bounded on the outside by a wall section 80. Through this guide channel 78, the conduit 52 extends to a second deflection point 82, at which the conduit 52 is deflected in a direction which extends approximately parallel to the axis of rotation 23. This deflection is clearly shown in Fig. 8. The line 52 extends there from the upper flange 28 through an opening 84 thereof to an opening 86 (Fig. 2) of the lower flange 26. The line 52 extends over a projecting, relatively sharp-edged rib 88, which from the stiffening wall 70 to the outer Peripheral of the section 24 extends, and approximately perpendicular to the axis of rotation 23 extends.

Wie Fig. 8 zeigt, bewirkt die Rippe 88 eine leichte Umlenkung der Leitung 52. Der Grund ist folgender: Wenn gemäß Fig. 2 eine Kraft F1 auf die Leitung 52 ausgeübt wird, würde das an sich eine Bewegung der Leitung 52 in Richtung des Kraftpfeils F2 im Bereich der Rinne 53 bewirken. Durch die Rippe 88 wird die Kraft F2 reduziert, und die beiden Niederhalter 57 und 58 verhindern, dass durch die Kraft F2 die Leitung 52 aus der Rinne 53 und der Nut 56 heraus springt.As shown in Fig. 8 , the rib 88 causes a slight deflection of the conduit 52. The reason is as follows. As shown in Fig. 2, when a force F1 is applied to the conduit 52, this would in itself cause the conduit 52 to move in the direction of the force arrow F2 in the region of the groove 53 cause. By the rib 88, the force F2 is reduced, and the two hold-downs 57 and 58 prevent the line 52 from jumping out of the groove 53 and the groove 56 due to the force F2.

Die Öffnung 84 ist, wie in Fig. 4 dargestellt, über eine bogenförmige Einhängeöffnung 90 (im Flansch 28) von außen zugänglich, so dass durch diese Öffnung 90 die Litzen 52 eingehängt werden können, sich aber nicht von selbst wieder aushängen können. Das wird von der Rippe 88 unterstützt.The opening 84 is, as shown in Fig. 4, accessible via an arcuate Einhängeöffnung 90 (in the flange 28) from the outside, so that through this opening 90, the strands 52 can be hung, but can not hang themselves again. This is supported by the rib 88.

Die Öffnung 86 (Fig. 2) im unteren Flansch 26 ist über einen etwa spiralförmigen Kanal 92 von außen zugänglich, so dass die Litzen 52 durch diesen Kanal 92 leicht eingehängt werden können, aber ein unbeabsichtigtes Aushängen der Litzen, also eine sogenannte Selbstbefreiung, durch die Rippe 88 verhindert wird.The opening 86 (FIG. 2) in the lower flange 26 is accessible from outside via an approximately spiral-shaped channel 92, so that the strands 52 can be easily suspended by this channel 92, but unintentional unhooking of the strands, ie a so-called self-emptying, takes place the rib 88 is prevented.

Durch die Erfindung ergeben sich vor Allem folgende Vorteile:

  • Man kann gleichzeitig Litzen 52 unterschiedlichen Durchmessers verwenden, z.B. eine dünnere Litze für eine Signalleitung.
  • Das Einhängen der Litzen 52 geht rasch und ohne Werkzeuge.
  • Die Zugentlastung 50 wirkt auf jede einzelne Litze 52.
  • Eine Selbstbefreiung der Litzen aus der Zugentlastung 50 ist weitgehend ausgeschlossen.
  • Die Zugentlastungsvorrichtung 50 kann mit einem einfachen Spritzgusswerkzeug mit nur zwei Schiebern hergestellt werden.
The invention provides the following advantages in particular:
  • It can simultaneously use strands 52 of different diameters, for example, a thinner strand for a signal line.
  • The hanging of the strands 52 goes quickly and without tools.
  • The strain relief 50 acts on each individual strand 52.
  • Self-liberation of the strands from the strain relief 50 is largely excluded.
  • The strain relief device 50 can be manufactured with a simple injection molding tool with only two slides.

Naturgemäß sind im Rahmen der vorliegenden Erfindung vielfache Abwandlungen und Modifikationen möglich.Naturally, many modifications and modifications are possible within the scope of the present invention.

Claims (10)

Lüfter, insbesondere Gerätelüfter, welcher aufweist: Ein Gehäuseteil (22), welches eine im Lüfter (20) vorgesehene Luftdurchtrittsöffnung (41) nach außen hin begrenzt; einen Motor (21) zum Antrieb von Lüfterflügeln (40), welche in der Luftdurchtrittsöffnung (41) um eine Drehachse (23) drehbar angeordnet sind; ein zwischen dem Motor (21) und dem Gehäuseteil (22) vorgesehenes Trägerelement (51), welches sich quer zur Luftdurchtrittsöffnung (41) erstreckt und nach Art einer Rinne (53) ausgebildet ist, die zur Aufnahme einer elektrischen Leitung (52) dient und diese vom Motor (21) zu einer vorgegebenen Stelle (64) des Gehäuseteils (22) führt; eine Umlenkeinrichtung (50), welche zumindest teilweise im Bereich der vorgegebenen Stelle (64) des Gehäuseteils (22) ausgebildet ist und dazu dient, durch Umlenken der elektrischen Leitung (52) an einer ersten Umlenkstelle (55) und an einer zweiten Umlenkstelle (84) und in mindestens zwei unter einem vorgegebenen Winkel zueinander verlaufenden Ebenen eine Zugentlastung für die zum Motor (21) führende Seite der elektrischen Leitung (52) zu bewirken. Fan, in particular device fan, which has: A housing part (22) which limits an air passage opening (41) provided in the fan (20) to the outside; a motor (21) for driving fan blades (40) which are rotatably arranged in the air passage opening (41) about a rotation axis (23); a between the motor (21) and the housing part (22) provided support member (51) which extends transversely to the air passage opening (41) and in the manner of a groove (53) is formed which serves to receive an electrical line (52) and this leads from the motor (21) to a predetermined position (64) of the housing part (22); a deflection device (50), which is formed at least partially in the region of the predetermined location (64) of the housing part (22) and serves, by deflecting the electrical line (52) at a first deflection point (55) and at a second deflection point (84 ) and in at least two at a predetermined angle to each other extending planes to provide a strain relief for the motor (21) leading side of the electrical line (52). Lüfter nach Anspruch 1, bei welchem die erste Umlenkstelle (55) dazu ausgebildet ist, die elektrische Leitung (52) in einer zur genannten Drehachse (23) im Wesentlichen senkrechten ersten Ebene umzulenken,
und die zweite Umlenkstelle (84) zur Umlenkung der elektrischen Leitung (52) von der ersten Ebene in eine zweite Ebene ausgebildet ist, welch letztere unter einem Winkel zur ersten Ebene verläuft.Fan according to claim 1, wherein the first deflection point (55) is designed to deflect the electrical line (52) in a first plane substantially perpendicular to the said axis of rotation (23),
and the second deflection point (84) is designed to deflect the electrical line (52) from the first plane to a second plane, the latter extending at an angle to the first plane. Lüfter nach Anspruch 2, bei welchem die erste Umlenkstelle (55) dazu ausgebildet ist, die elektrische Leitung (52) etwa in Gegenrichtung umzulenken.Fan according to claim 2, wherein the first deflection point (55) is adapted to deflect the electrical line (52) approximately in the opposite direction. Lüfter nach einem der vorhergehenden Ansprüche, bei welchem das Trägerelement (51) einen Niederhalter (54) aufweist, welcher dazu ausgebildet ist, einer aus der im Trägerelement (51) vorgesehen Rinne (53) heraus erfolgenden Bewegung der elektrischen Leitung (52) entgegen zu wirken.Fan according to one of the preceding claims, in which the carrier element (51) has a holding-down device (54) which is designed to counteract a movement of the electric line (52) out of the channel (53) provided in the carrier element (51) Act. Lüfter nach einem der vorhergehenden Ansprüche, bei welchem die Zugentlastungsvorrichtung (50) eine erste Einhängevorrichtung (84) aufweist, welche an einem zur genannnten Drehachse (23) im Wesentlichen senkrechten ersten Gehäuseabschnitts (28) ausgebildet ist und eine erste Einführrinne (88) aufweist, welche in einer ersten Aussparung (84) endet und zum Einführen der elektrischen Leitung (52) in diese Aussparung (84) ausgebildet ist.Fan according to one of the preceding claims, in which the Strain relief device (50) has a first suspension device (84) which is formed on a genannnten to the rotation axis (23) substantially perpendicular to the first housing portion (28) and a first insertion channel (88) which ends in a first recess (84) and for introducing the electrical line (52) into this recess (84) is formed. Lüfter nach Anspruch 5, bei welchem die Zugentlastungsvorrichtung (50) eine zweite Einhängevorrichtung (86) aufweist, welche an einem zum ersten Gehäuseabschnitt (28) im wesentlichen parallel verlaufenden zweiten Gehäuseabschnitt (26) ausgebildet ist und eine zweite Einführrinne (92) aufweist, welche in einer zweiten Ausnehmung (86) endet und zum Einführen der elektrischen Leitung (52) in diese zweite Aussparung (86) ausgebildet ist.A fan according to claim 5, wherein the strain relief device (50) comprises a second suspension device (86) formed on a second housing section (26) substantially parallel to the first housing section (28) and having a second insertion channel (92) in a second recess (86) ends and is formed for insertion of the electrical line (52) in this second recess (86). Lüfter nach Anspruch 5 und 6, bei welchem zwischen der ersten Einhängevorrichtung (84) und der zweiten Einhängevorrichtung (86) am Gehäuse (22) des Lüfters (20) eine Fixierkante (88) vorgesehen ist, welche eine Umlenkung der elektrischen Leitung (52) zwischen den beiden Einhängeeinrichtungen bewirkt, um einem Aushängen der Litzen (52) aus den Einhängevorrichtungen (86, 92) entgegen zu wirken.Fan according to claim 5 and 6, wherein between the first suspension device (84) and the second suspension device (86) on the housing (22) of the fan (20) a fixing edge (88) is provided, which a deflection of the electrical line (52). between the two Einhängeeinrichtungen effected to counteract a detachment of the strands (52) from the suspension devices (86, 92). Lüfter nach Anspruch 7, bei welchem die Fixierkante (88) scharfkantig ausgebildet ist.Fan according to claim 7, wherein the fixing edge (88) is sharp-edged. Lüfter nach einem der vorhergehenden Ansprüche, bei welchem das Lüftergehäuse (22) aus Kunststoff ausgebildet ist.Fan according to one of the preceding claims, wherein the fan housing (22) is formed of plastic. Lüfter nach einem der vorhergehenden Ansprüche, bei welchem das Lüftergehäuse (22), in Richtung der Drehachse (23) gesehen, einen etwa quadratischen, Ecken (64) aufweisenden Umfang aufweist,
und die Zugentlastungsvorrichtung (50) im Bereich einer Ecke (64) angeordnet ist.Fan according to one of the preceding claims, in which the fan housing (22), seen in the direction of the axis of rotation (23), has an approximately square circumference, having corners (64),
and the strain relief device (50) is disposed in the region of a corner (64).
EP06010905A 2005-08-19 2006-05-27 Fan Active EP1754892B1 (en)

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ATE449912T1 (en) 2009-12-15
EP1754892B1 (en) 2009-11-25
DE502006005443D1 (en) 2010-01-07
US7811069B2 (en) 2010-10-12
US20070041857A1 (en) 2007-02-22

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