EP1644642B1 - Mini-ventilateur - Google Patents

Mini-ventilateur Download PDF

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Publication number
EP1644642B1
EP1644642B1 EP04732097A EP04732097A EP1644642B1 EP 1644642 B1 EP1644642 B1 EP 1644642B1 EP 04732097 A EP04732097 A EP 04732097A EP 04732097 A EP04732097 A EP 04732097A EP 1644642 B1 EP1644642 B1 EP 1644642B1
Authority
EP
European Patent Office
Prior art keywords
fan according
mini fan
bearing tube
constructed
bearing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP04732097A
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German (de)
English (en)
Other versions
EP1644642A1 (fr
Inventor
Wolfgang Arno Winkler
Nils Rapp
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
Original Assignee
Ebm Papst St Georgen GmbH and Co KG
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Publication of EP1644642A1 publication Critical patent/EP1644642A1/fr
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Publication of EP1644642B1 publication Critical patent/EP1644642B1/fr
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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
    • F04D29/00—Details, component parts, or accessories
    • F04D29/06—Lubrication
    • F04D29/063—Lubrication specially adapted for elastic fluid pumps
    • 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
    • F04D25/062—Details of the bearings
    • 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
    • F04D29/05—Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
    • F04D29/056—Bearings
    • F04D29/057—Bearings hydrostatic; hydrodynamic
    • 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
    • F04D29/60—Mounting; Assembling; Disassembling
    • F04D29/64—Mounting; Assembling; Disassembling of axial pumps
    • F04D29/644—Mounting; Assembling; Disassembling of axial pumps especially adapted for elastic fluid pumps
    • F04D29/646—Mounting or removal of fans

Definitions

  • the invention relates to a mini fan.
  • Such fans are also referred to as small or micro fans, and are known from US Pat. No. 6,520,476 ,
  • the power consumption of such fans is 0.4 ... 0.6 W for the 250 series, 0.7 ... 0.9 W for the 400F series, and 0.9 for the 400 and 600 series. .3,4 W.
  • the weight is eg
  • the Series 250 is about 5 (five) grams
  • the Series 400 / 400F is 17 to 27 grams
  • the Series 600 is about 85 grams.
  • mini-fans In such mini-fans is aggravating added that their components, quite comparable to those of a mechanical movement, are very delicate and therefore not very robust.
  • the rotor shaft has e.g. often just the thickness of a knitting needle and can therefore be easily bent when carefree, making the fan unusable. This danger particularly exists during the assembly of such a mini-fan, for example when it has to be subjected to a force for mounting.
  • Fig. 1 shows in a very greatly enlarged scale a longitudinal section through a mini fan 16, which is associated with its drive an external rotor motor 20.
  • the fan 16 may have the dimensions 10 x 30 x 30 mm, for example.
  • the motor 20 has an outer rotor 22 with a rotor bell 24, preferably made of a heat-conducting plastic, on whose outer circumference fan blades 26 are provided.
  • a magnetic yoke 27 is attached from soft iron, and on its inside a radially magnetized rotor magnet 28, which may be magnetized, for example, four-pole.
  • the outer diameter of the outer rotor 22 may be in the range of about 14 to about 35 mm, for example.
  • the fan 16 is shown here as an axial fan, but the invention is e.g. also usable with diagonal fans and radial fans.
  • the rotor bell 24 has in its center a hub 30 in which a corresponding shaped upper shaft end 32 of a rotor shaft 34 is heat conductively secured by plastic spraying, whose lower, free shaft end is denoted by 35.
  • a sliding bearing 36 For radial mounting of the shaft 34 is a sliding bearing 36, which is preferably designed as a sintered bearing. Alternatively, in the context of the invention, the shaft 34 can also be mounted with roller bearings in order to achieve a particularly long service life.
  • the sliding bearing 36 is fixed in the interior of a constriction 37 of a bearing tube 38 by pressing.
  • the bearing tube 38 is preferably made of steel, brass or other suitable metal, possibly also a plastic.
  • a radial projection in the form of a flange 39 is provided, which serves for fastening of the fan 16 and extends here approximately perpendicular to the axis of rotation 41 of the rotor 22.
  • the inner stator 44 of the motor 20 On the outside of the bearing tube 38, the inner stator 44 of the motor 20 is fixed by pressing.
  • the constriction 37 has a substantially cylindrical inner side 40 (FIG. Fig. 2 and 3 ), whose surface is processed very carefully, while the remaining inner side of the bearing tube 38 only needs to be roughly processed.
  • the sintered bearing 36 has a bulbous portion 42 having a diameter which corresponds approximately to the diameter of the inner side 40 and is dimensioned so that when mounting in the inner side 40 results in a tight fit.
  • the sintered bearing 36 has a section 43 (FIG. Fig. 2 ) with an enlarged diameter, on which the sintered bearing does not bear against the shaft 34. This avoids that the sintered bearing 36 is compressed too strongly radially when unfavorable tolerances come together, which could make it impossible to insert the shaft 34.
  • a lower sliding bearing portion 48 Below the portion 43 is a lower sliding bearing portion 48, and above the portion 43 is an upper sliding bearing portion 50, see. Fig. 2 , It has been found that this gives a very reliable storage of the shaft 34 and a correspondingly long running time of the motor 20, especially in mini-fans with their small dimensions.
  • the stator 44 has in the usual way a laminated core 45, which is encapsulated with a bobbin 46, on which a winding (not shown) is wound.
  • the stator could also be designed as a claw-pole stator, a design which is frequently used in such small fans.
  • the illustrated embodiment represents a preferred embodiment.
  • the shaft 34 has at its free end portion 35 an annular groove 58, in which after mounting elastic locking hooks 60 are engaged. These have a smaller axial extent than the annular groove 58, and their function is mainly to secure the rotor 22 against accidental removal. As Fig. 3 shows particularly clearly, are the latch hooks 60 at no point against the shaft 34 at.
  • the latching hooks 60 are integrally formed with a lid (latching lid) 62 and are located on a lubricant depot 64, at the bottom of which there is a recess 66 in which a track tip 68 of the shaft 34 rotates.
  • the recess 66 may also be referred to as a "track cup”. Recess 66 and track 68 together form a thrust bearing for the shaft 34th
  • the fan 16 has an outer air guide housing 74, which is connected via webs 76, of which only one is indicated, with the flange 78 which carries the motor 20.
  • the flange 78 has in its center a recess 80, which serves for receiving and guiding the bearing tube 38.
  • a flange-like widening 39 of the bearing tube 38 is guided in a corresponding recess 84 of the flange 78.
  • the bearing tube 38 is epilaminated at the locations where it is guided in the flange 78 to change its surface tension so that no or very little lubricant from the depot 64 can migrate outward along this surface.
  • the recess 84 has a larger diameter than the recess 80.
  • the recess 84 closes as in Fig. 3 shown, a recess 86 with even larger diameter, and thereon a very shallow recess 88 with even larger diameter.
  • the latching lid 62 is formed complementary to the recesses 84, 86 and 88 and preferably guided in the innermost recess 84, in particular in the manner of a sliding seat.
  • Its lower surface 90 ( Fig. 3 ) serves as a nameplate, is substantially flat and aligned with the bottom 92 on the outer circumference of the flange 72.
  • a nameplate can be glued, or this underside is labeled directly, for example by means of laser marking.
  • Both the flange 78 and the cover 62 are made of a suitable thermoplastic hard plastic, for example PA6.6, which by means of a laser 96 (FIG. Fig. 1 ) can be welded. It preferred the latch cover 62 brightly colored, eg white, to allow easy printing. It has a corresponding transmittance (transmission) for a focused laser radiation 98 emanating from the laser 96, which points to locations 100, 102 (FIG. Fig. 3 ) is focused on both sides of the outer boundary of the recess 86.
  • a suitable thermoplastic hard plastic for example PA6.6
  • a glass plate 104 Before welding is done according to Fig. 1 pressed a glass plate 104 with a force F from below against the lid 62, and then the fan 16 is rotated under the laser 96 to obtain a continuous, liquid-tight weld at the locations 100, 102.
  • the fan 16 may be fixed and the laser 96 rotated.
  • the pressed glass plate 104 prevents deformations of the cover 62 during welding.
  • the inner stator 44 is on the outer side 106 (FIG. Fig. 3 ) of the bearing tube 38 is pressed.
  • This outer side is cylindrical, but may optionally taper slightly upwards, so be slightly conical.
  • the stator 44 is preferably pressed so far until the bobbin 46 abuts against the top of the flange 78
  • Fig. 2 schematically shows the circulation of designated by 110 and indicated with points lubricant in the bearing tube 38. This rises on the shaft 34 up to the hub 30, which at her in Fig. 2 lower end has an undercut 112 through which the lubricant 110 is thrown outward.
  • the bearing tube 38 has its upper end on the inside also an undercut 114, which prevents 16 at a tilt of the fan lubricant 110 expires from this. For this reason, the gap 116 between the bearing tube 38 and rotor 22 is very narrow and dimensioned in the manner of a capillary gap.
  • the lubricant 110 thrown outwardly from the undercut 112 flows along the inner wall of the bearing tube 38 down to the sintered bearing 36 and through this further down into the reservoir 64. In this way it is ensured that in the reservoir 64 and in its recess 66 constantly a sufficient supply of lubricant 110 is located, which is particularly important for a low-noise start at low temperatures.
  • Fig. 3 shows the connection of the winding (not shown) of the stator 44 with a circuit board 120, which is located between the inner stator 44 and the flange 78.
  • 46 pins 122 are provided on the bobbin plastic, of which in Fig. 3 only one is shown.
  • a lead wire 124 of the stator winding (not shown) is wound before this pin is passed through an opening 126 of the printed circuit board 120 and soldered by means of solder 128 to a printed circuit on the printed circuit board 120.
  • On the circuit board 120 is also a (not shown) rotor position sensor, such as a Hall generator.
  • the circuit board 120 which is equipped on both sides with electrical components 134, either by the plastic pins 122 or the wire pins 132 held on the stator 44. In the middle, it has a recess 134 with which it surrounds an axial projection 136 of the hub 78.
  • the sintered bearing 36 is pressed from below into the bearing tube 38, in its optimally machined inner side 40, ie in the constriction 37. Subsequently, the bearing tube 38 is pressed into the recess 80 of the housing flange 78, and the latching lid 62 is placed and welded to the flange 78 in the manner described. Thereby, the bearing tube 38 is liquid-tightly connected to the flange 78.
  • the stator assembly 44 is connected to the circuit board 120 in the manner described and then pressed onto the bearing tube 38.
  • the fan 22 is provided with the magnetic ring 28, and this is magnetized in the desired manner.
  • the recess 66 for the tip 68 is filled with grease, and the shaft 34 is inserted through the - previously impregnated with lubricant - sintered bearing 36 until the retaining claws 60 snap into the annular groove 58 and make withdrawal of the rotor 22 impossible.
  • the mini fan 16 after the Fig. 1 to 3 has a relatively large height, which limits its applications.
  • the fan shown below according to a second embodiment of the invention allows an extremely flat design.
  • the same or equivalent components are in the second embodiment of the Fig. 4 to 10 the same reference numerals used, but increased by 200, so for example 220 in the second embodiment instead of 20 at the first.
  • Fig. 4 shows a printed circuit board 217 to which a mini-fan 216 (FIG. Fig. 10 ) is fixed to cool hot components located on the circuit board 217.
  • a mini-fan 216 FIG. Fig. 10
  • a mini fan 216 as in Fig. 10 is shown, allows such active cooling and this requires very little space.
  • the mini-fan 216 has an outer rotor 222 with a rotor bell 224, on whose outer circumference fan blades 226 are provided.
  • a magnetic yoke 227 made of soft iron is fixed, and on the inside there is a radially magnetized rotor magnet 228, which may be magnetized, for example, four-pole.
  • the outer diameter D ( Fig. 10 ) of the outer rotor 222 is preferably in the range of about 14 to about 35 mm. Naturally, the use of the invention is not excluded even with larger engines.
  • the fan 216 may be of any type, such as an axial, radial or diagonal fan.
  • the rotor bell 224 has in its center a hub 230 in which a correspondingly shaped upper shaft end 232 of a rotor shaft 234 is heat-conductively secured by plastic spraying or the like, whose lower, free shaft end is denoted by 235.
  • a sliding bearing 236, which is preferably designed as a double sintered bearing.
  • the shaft 234 can also be mounted with roller bearings in order to achieve a particularly long service life.
  • the sliding bearing 236 is fixed in a bearing tube 238 by pressing.
  • the bearing tube 238 is preferably made of steel, brass or other suitable material. The use of a plastic is not excluded.
  • the bearing tube 238 is provided with a radial projection in the form of a flange 239, which in this example is approximately perpendicular to the axis of rotation 241 of the rotor 222; On the outside of the bearing tube 238 of the inner stator 244 of the motor 220 is fixed by pressing, see. Fig. 4 ,
  • the sintered bearing 236 has a bulbous portion 242 with a diameter which corresponds approximately to the diameter of a cylindrical portion of the inner side 240 of the bearing tube 238 and is dimensioned so that there is a tight fit during assembly.
  • the sintered bearing 236 has a lower slide bearing portion 248 and an upper slide bearing portion 250. This allows a reliable bearing of the shaft 234 and a correspondingly long running time of the motor 220 even at the high rotational speeds of these mini fans, often in the range of 6000 to 9000 U / min lie.
  • the stator 244 has in the usual way a laminated core 245, which is encapsulated with a bobbin 246, on which a winding 247 is wound.
  • the stator 244 could also be designed as a claw-pole stator.
  • the shaft 234 has at its free end portion 235 an annular groove 258, in which after mounting elastic locking hooks 260 are engaged. These have a smaller axial extent than the annular groove 258, and their function is mainly to secure the rotor 222 against unintentional removal.
  • the latching hooks 260 are not against the shaft 234 at any point. They are integrally formed with a cover (detent cover) 262 and are located at a lubricant depot 264, at the bottom of which there is a recess 266 in which a track 268 (FIG. Fig. 9 ) of the shaft 234 rotates.
  • the recess 266 may also be referred to as a "track cup”. Recess 266 and 266 trace together form a thrust bearing for the shaft 234th
  • the bearing tube 238 has in its upper portion a hollow cylindrical portion 240, and this extends downwards in the manner of a hollow truncated cone 270, which merges into an approximately cylindrical portion 271 below, in which annular grooves 272, 273 are formed with approximately semicircular cross-section , see. Fig. 5 , Downwardly, the cylindrical portion 271 widens in the manner of a hollow truncated cone 274.
  • On his Outside has the bearing tube 238 above a cylindrical portion 275, on which the inner stator 244 is pressed, see. Fig. 4 , And the section 275 is via a shoulder 276 in the top of the flange 239.
  • the locking cover 262 has on its outer side 283 Rastwülste 284, 285, which are shown only in this enlarged view.
  • these beads 284, 285 provide a slight detent and at the same time provide an excellent seal so that no lubricant can drain from the depot 264.
  • the plastic used for the lid 262 is so heat resistant that it is not damaged when passing through a solder bath.
  • the flange 239 either has the shape Fig. 6 with four radial grooves 292, or the mold 239 'according to Fig. 7 .
  • the printed circuit board 217 has corresponding holes 294 into which these wire pins 288 are inserted during assembly and then soldered to a solder 296 in the solder bath, wherein the solder 296 rises by capillary action through the hole 294 and also the terminal 290 with the pin 288th soldered.
  • This Lot 296 then simultaneously represents the electrical and mechanical connection of the inner stator 244 with the printed circuit board 217. This is possible because such a mini fan only has a weight of, for example, 20 g.
  • the circulation of the lubricant corresponds to the illustration according to Fig. 2 and therefore will not be repeated.
  • the hub 230 has at its in Fig. 9 bottom end of an undercut 3.12, which hurls the lubricant to the outside.
  • the bearing tube 238 has at its upper end on the inside also an undercut 314, which prevents 216 at an inclined position of the fan lubricant runs out of this. For this reason, the gap 316 between the bearing tube 238 and rotor 222 is very narrow and dimensioned in the manner of a capillary gap to prevent the escape of lubricant.
  • the lubricant thrown outwardly from the undercut 312 flows down the inner wall 240 of the bearing tube 238 down to the sintered bearing 236 and through this further down into the reservoir 264. In this way it is ensured that in the reservoir 264 and its recess 266 constantly sufficient supply of lubricant is located.
  • Fig. 4 First, the cylindrical part 271, 279 of the bearing tube 238 is pressed into the opening 280 of the circuit board 217, whereby the image in accordance with Fig. 9 results. In this state, the circuit board 217 is soldered in a conventional manner in a solder bath.
  • the rotor 222 is married to the inner stator 244, according to Fig. 10 the safety members 260 are first deflected outwardly and then snap into the annular groove 258 of the rotor shaft 234, thus preventing the rotor 222 from being withdrawn again. To avoid friction losses, which is very important in these very small motors, the safety members 260 are not against the annular groove 258 at.
  • the fan 216 is tested in the usual manner.
  • the commutation can e.g. by means of the induced voltage, for which purpose then a corresponding sensor coil is provided, or one uses a semiconductor sensor which detects the position of the rotor 222. Such things are at the discretion of the skilled person.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Motor Or Generator Frames (AREA)

Claims (28)

  1. Mini-ventilateur, qui présente :
    un moteur d'entraînement avec un rotor extérieur (22 ; 222) et un stator intérieur (44 ; 244), le rotor extérieur étant pourvu d'un arbre de rotor (34 ; 234) qui est doté d'un étranglement (58 ; 258) dans la région de son extrémité libre (35 ; 235) ;
    un tube de palier (38 ; 238), sur le côté extérieur duquel est fixé le stator intérieur (44 ; 244) et à l'intérieur duquel est disposé un ensemble de palier (36 ; 236) dans lequel l'arbre de rotor (34 ; 234) est monté rotatif,
    caractérisé par
    un dispositif de fermeture (62 ; 262), qui ferme le tube de palier (38 ; 238) en étanchéité aux liquides à une extrémité et qui est pourvu, dans la région de l'étranglement (58 ; 258) de l'arbre de rotor (34 ; 234), d'au moins un élément de blocage élastique (60 ; 260), le dispositif de fermeture (62 ; 262) et l'élément de blocage élastique (60 ; 260) étant réalisés d'un seul tenant et l'élément de blocage élastique (60 ; 260) s'engageant dans l'étranglement (58 ; 258) de l'arbre de rotor (34 ; 234), sans entrer en contact avec l'arbre de rotor pendant le fonctionnement normal et empêchant ainsi l'arbre de rotor de sortir de l'ensemble de palier (36 ; 236).
  2. Mini-ventilateur selon la revendication 1, dans lequel le dispositif de fermeture est réalisé à la manière d'un couvercle (62) qui est constitué d'une matière thermoplastique au moins partiellement transparente pour la lumière laser, ce couvercle (62) étant fixé par une liaison soudée (100, 102) essentiellement étanche aux liquides.
  3. Mini-ventilateur selon la revendication 2, qui présente un boîtier doté d'une bride (78), et la liaison soudée (100, 102) étant prévue en un endroit où le couvercle (62) recouvre au moins partiellement une partie de cette bride (78).
  4. Mini-ventilateur selon la revendication 2 ou 3, qui présente un boîtier doté d'une bride (78) et dans lequel le tube de palier (38) est maintenu entre le dispositif de fermeture réalisé à la manière d'un couvercle (62) et une partie de cette bride (78).
  5. Mini-ventilateur selon l'une des revendications 2 à 4, dans lequel le tube de palier (38) est emmanché essentiellement en étanchéité aux liquides dans une ouverture (80) de la bride (78).
  6. Mini-ventilateur selon la revendication 5, dans lequel le tube de palier (38) est réalisé sous forme de pièce métallique et est épilamé sur son côté emmanché dans l'ouverture (80) de la bride.
  7. Mini-ventilateur selon l'une des revendications 3 à 6, dans lequel le tube de palier (38) est pourvu d'une saillie radiale (39) qui est maintenue par complémentarité de forme entre le dispositif de fermeture (62) réalisé à la manière d'un couvercle et une partie de la bride (78).
  8. Mini-ventilateur selon la revendication 7, dans lequel la saillie radiale (39) est réalisée à la manière d'une bride.
  9. Mini-ventilateur selon la revendication 8, dans lequel la bride (39) est prévue sur une partie terminale du tube de palier (38).
  10. Mini-ventilateur selon l'une des revendications précédentes, dans lequel l'arbre de rotor (34 ; 234) présente une extrémité libre (35 ; 235) opposée au rotor (22 ; 222) et sur laquelle est prévu un sommet de butée (68 ; 268) pour l'appui axial, et dans lequel une surface de portée (66 ; 266) est prévue pour ce sommet de butée sur le dispositif de fermeture (62 ; 262).
  11. Mini-ventilateur selon la revendication 10, dans lequel la surface de portée est réalisée sous forme de renfoncement (66 ; 266) et est pourvue d'un lubrifiant (110).
  12. Mini-ventilateur selon la revendication 10 ou 11, dans lequel le sommet de butée (68 ; 268) est sollicité en direction du dispositif de fermeture (62 ; 262) par une force (Fm) produite magnétiquement.
  13. Mini-ventilateur selon l'une des revendications précédentes, dans lequel un élément d'écartement (35 ; 235) est prévu dans la région de l'extrémité libre de l'arbre (34 ; 234) et est conçu pour, lors du montage de l'arbre (34 ; 234), dévier en direction radiale l'élément de blocage élastique au moins unique (60 ; 260).
  14. Mini-ventilateur selon l'une des revendications précédentes, dans lequel le dispositif de fermeture est réalisé à la manière d'un bouchon (262), qui est fixé dans une ouverture (271) du tube de palier (238).
  15. Mini-ventilateur selon la revendication 14, dans lequel le dispositif de fermeture réalisé à la manière d'un bouchon (262) est emmanché en étanchéité aux liquides dans l'ouverture du tube de palier (238).
  16. Mini-ventilateur selon la revendication 14 ou 15, dans lequel, au point de transition (271, 283) entre le tube de palier (238) et le bouchon (262), un bourrelet annulaire (284, 285) est configuré sur une de ces pièces et une rainure annulaire (272, 273) complémentaire dudit bourrelet sur l'autre pièce, le bourrelet et la rainure formant ensemble une liaison par encliquetage lorsque le bouchon (262) est monté.
  17. Mini-ventilateur selon l'une des revendications 14 à 16, dans lequel le tube de palier (238) présente un plus grand diamètre intérieur sur sa partie (271) prévue pour recevoir le bouchon (262) que sur sa partie (240) prévue pour recevoir l'ensemble de palier (236).
  18. Mini-ventilateur selon l'une des revendications précédentes, dans lequel le tube de palier (238) présente une partie (278) qui fait saillie en éloignement du rotor (222) et est conçue pour être montée dans un évidement (280) d'un élément de construction (217).
  19. Mini-ventilateur selon l'une des revendications précédentes, dans lequel le stator intérieur (44 ; 244) présente un empilage de tôles (45 ; 245) sur lequel est disposé un corps de bobine (46 ; 246) pourvu d'un bobinage de stator (247), et au moins un conducteur électrique rigide (132 ; 288) qui est électriquement relié au bobinage de stator (247) est fixé sur ce corps de bobine.
  20. Mini-ventilateur selon la revendication 19, dans lequel le conducteur électrique rigide au moins unique (132 ; 288) s'étend sensiblement parallèlement à l'axe de rotation (41 ; 241) du mini-ventilateur.
  21. Mini-ventilateur selon la revendication 19 ou 20, dans lequel le tube de palier (238) présente une bride (239) faisant saillie vers l'extérieur, qui est pourvue d'un trou débouchant (292) pour le passage du conducteur électrique rigide (288).
  22. Mini-ventilateur selon l'une des revendications 10 à 12, dans lequel le stator intérieur (44 ; 244) présente un empilage de tôles (45 ; 245), et le rotor extérieur (22 ; 222) présente un aimant permanent (28 ; 228) qui coopère avec le stator intérieur et qui est décalé, par rapport à l'empilage de tôles (45 ; 245) du stator intérieur (44 ; 244), de telle sorte qu'une force magnétique (Fm) est produite qui sollicite le sommet de butée (68 ; 268) en direction de la surface de portée (66 ; 266).
  23. Mini-ventilateur selon l'une des revendications précédentes, dans lequel une partie terminale (32 ; 232) de l'arbre (34 ; 234) est reliée à une roue de ventilateur (26 ; 226),
    et une surface (112 ; 312) s'étendant approximativement radialement et se trouvant à l'intérieur du tube de palier (38 ; 238) est prévue dans la région de la transition entre l'arbre (34 ; 234) et la roue de ventilateur (26 ; 226), de sorte que du lubrifiant (110) expulsé de cette surface lors de la rotation de la roue de ventilateur est projeté à l'intérieur du tube de palier (38 ; 238).
  24. Mini-ventilateur selon la revendication 23, dans lequel la surface (112 ; 312) s'étendant approximativement radialement est réalisée contre-dépouillée.
  25. Mini-ventilateur selon la revendication 23 ou 24, dans lequel le tube de palier (38 ; 238) présente, dans la région de son extrémité opposée au couvercle (62 ; 262), une partie (114 ; 314) faisant saillie vers l'intérieur.
  26. Mini-ventilateur selon la revendication 25, dans lequel la partie (114 ; 314) faisant saillie vers l'intérieur est séparée de la roue de ventilateur (26 ; 226) au moins localement par une fente (116 ; 316), la fente étant réalisée à la manière d'une fente capillaire afin de réduire la sortie de lubrifiant (110) par cette fente.
  27. Mini-ventilateur selon la revendication 25 ou 26, dans lequel la partie (114 ; 314) faisant saillie vers l'intérieur du tube de palier (38 ; 238) est réalisée, sur son côté tourné vers le dispositif de fermeture (62 ; 262), à la manière d'une contre-dépouille (114 ; 314).
  28. Mini-ventilateur selon l'une des revendications précédentes, dans lequel l'ensemble de palier présente un palier fritté (36) qui est disposé dans le tube de palier (38), le tube de palier présentant sur son côté intérieur une partie (37) de diamètre réduit pour recevoir le palier fritté (36).
EP04732097A 2003-07-16 2004-05-11 Mini-ventilateur Expired - Lifetime EP1644642B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE20311307 2003-07-16
DE202004005341 2004-03-30
PCT/EP2004/005017 WO2005008072A1 (fr) 2003-07-16 2004-05-11 Mini-ventilateur

Publications (2)

Publication Number Publication Date
EP1644642A1 EP1644642A1 (fr) 2006-04-12
EP1644642B1 true EP1644642B1 (fr) 2012-02-29

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EP04732097A Expired - Lifetime EP1644642B1 (fr) 2003-07-16 2004-05-11 Mini-ventilateur

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US (1) US8915721B2 (fr)
EP (1) EP1644642B1 (fr)
AT (1) ATE547632T1 (fr)
DE (1) DE202004010890U1 (fr)
ES (1) ES2386716T3 (fr)
WO (1) WO2005008072A1 (fr)

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Also Published As

Publication number Publication date
ATE547632T1 (de) 2012-03-15
US20060153677A1 (en) 2006-07-13
ES2386716T3 (es) 2012-08-28
EP1644642A1 (fr) 2006-04-12
US8915721B2 (en) 2014-12-23
DE202004010890U1 (de) 2004-09-30
WO2005008072A1 (fr) 2005-01-27

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