EP0310391B1 - Ventilateur axial - Google Patents

Ventilateur axial Download PDF

Info

Publication number
EP0310391B1
EP0310391B1 EP19880309047 EP88309047A EP0310391B1 EP 0310391 B1 EP0310391 B1 EP 0310391B1 EP 19880309047 EP19880309047 EP 19880309047 EP 88309047 A EP88309047 A EP 88309047A EP 0310391 B1 EP0310391 B1 EP 0310391B1
Authority
EP
European Patent Office
Prior art keywords
yoke
circuit board
hub
housing
fan
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
Application number
EP19880309047
Other languages
German (de)
English (en)
Other versions
EP0310391A2 (fr
EP0310391A3 (en
Inventor
Hideo Hirama
Shinichi Hayashizaki
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.)
Seiko Electronic Components Ltd
Original Assignee
Seiko Electronic Components Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP15089887U external-priority patent/JPH0158278U/ja
Priority claimed from JP24884587A external-priority patent/JPH0192599A/ja
Application filed by Seiko Electronic Components Ltd filed Critical Seiko Electronic Components Ltd
Publication of EP0310391A2 publication Critical patent/EP0310391A2/fr
Publication of EP0310391A3 publication Critical patent/EP0310391A3/en
Application granted granted Critical
Publication of EP0310391B1 publication Critical patent/EP0310391B1/fr
Expired legal-status Critical Current

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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
    • F04D25/0633—Details of the magnetic circuit
    • 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 present invention relates to an axial flow fan and, although it is not so restricted, it relates more particularly to an axial flow fan disposed in a casing of an office-automation instrument to circulate air therethrough so as to cool heated parts thereof.
  • An axial flow fan comprising a rotary member provided with a fan member; a motor portion of an electric motor for rotating the rotary member; a circuit board carrying an electrical component or components for controlling the operation of the motor portion; and a housing having a housing portion to one side of which the rotary member and the motor portion are mounted.
  • the motor portion and the circuit board are inserted into the housing from the same direction when they are assembled into a superposed structure.
  • the central portion of the circuit board has a relatively large opening for the passage therethrough of a shaft support sleeve.
  • the circuit board has a limited amount of space available for electrical components and there is limited flexibility for the arrangement of these components.
  • the circuit board is disposed under and is covered by the motor portion so that it cannot be removed separately once it is assembled into the housing. Replacement, repair and adjustment of the circuit board are therefore difficult.
  • an axial flow fan comprising a rotary member provided with a fan member; a motor portion of an electric motor for rotating the rotary member; a circuit board carrying an electrical component or components for controlling the operation of the motor portion; and a housing having a housing portion to one side of which the rotary member and the motor portion are mounted, the circuit board being mounted on the opposite side of the housing portion, the axial flow fan having been assembled by introducing the rotary member and the motor portion into the housing from the said one side, and introducing the circuit board into the housing from the said opposite side, characterised in that the rotary member comprises a hollow fan hub having an opening at one end thereof, and a hollow yoke disposed inside the hub, the hollow yoke having a tapered shape such that its internal diameter increases towards the said hub opening, the inner diameter of the said opening of the fan hub being greater than that of the end of the yoke remote from said opening.
  • the yoke may be insert-moulded into the fan hub.
  • the yoke may be cup-shaped having an end portion with an opening therein in which a portion of the hub is mounted.
  • the yoke and hub may be moulded together to form an integral structure.
  • the yoke is preferably provided at its larger end portion with a radiused surface to facilitate the introduction into the yoke of a magnet which forms part of the rotary member.
  • a known axial flow fan has a fan member 1, a fan shaft 4, a coil 8, a core 9, a Hall device 13, and a circuit board 10 to which the coil 8 is connected by a lead wire 15 and which is connected to a power source (not shown) by a power line 22.
  • the circuit board 10 is secured to a housing 12 by a screw 24.
  • the parts 8, 9 which form a motor portion and the circuit board 10 are inserted into the housing 12 from the same direction when they are assembled into a superposed structure.
  • the fan shown in Figure 1 moreover, has a rotary member which, in addition to comprising the fan member 1 and shaft 4, also comrpises a hollow fan hub 25 having an opening at its bottom end and a hollow yoke 2 disposed inside the hub 25, a magnet 3 being mounted in and carried by the yoke 2.
  • the yoke 2 and the hub 25 can be attached to each other by adhesive or by welding.
  • the central portion of the circuit board 10 has a relatively large opening for the passage therethrough of a sleeve 5 which is used to support the shaft 4 by way of a ball bearing 6. Because of this, the circuit board 10 has a limited amount of effective space for electrical components and there is limited flexibility for the arrangement of these components. Further, the circuit board 10 is disposed under and is covered by the motor portion 8, 9 so that the circuit board 10 cannot be removed separately once it is assembled into the housing 12. Replacement, repair and adjustment of the circuit board 10 are therefore difficult.
  • FIG 2 there is therefore shown an axial flow fan according to the present invention in which a fan member 1 is insert-moulded together with a yoke 2, a magnet 3 and a shaft 4 to form an integrated rotary member.
  • a sleeve 5 forms a shaft support portion of a housing 12 having a substantially U-shaped base portion 12 a .
  • Inside the sleeve 5 there is mounted a ball bearing 6 and a ring 7 composed of oil-less metal.
  • the sleeve 5 supports about it a motor or drive portion of an electric motor for rotating the said rotary member, the motor portion comprising a coil 8 and a core 9 which holds the coil 8.
  • the fan member 1 is mounted on the shaft 4 which is itself rotatably mounted in the sleeve or shaft support portion 5.
  • the shaft 4 is positioned in the thrust direction by means of a stopper washer 21 which is engaged in a slit recess formed in the end of the shaft 4.
  • a circuit board 10 is attached to and disposed below the base portion 12 a of the housing 12 by means of a sole screw 24.
  • the circuit board 10 has mounted thereon an electronic component 20 for controlling the operation of the motor portion 8, 9.
  • a Hall device 13 is supported by and above the circuit board 10 by way of a support member 27 which is secured to the bottom of the circuit board 10.
  • the Hall device 13 is mounted in position by passing it through a rectangular hole 14 in the base portion 12 a of the housing 12 so as to extend adjacent to a bottom face of the core 9 which will thus be adjacent the top of the Hall device 13.
  • a lead wire 15 of the coil 8 passes downwardly through a round hole 16 in the base portion 12 a of the housing 12 and is attached to the circuit board 10.
  • a cavity 17 in the bottom surface of the base portion 12 a of the housing 12 is provided to receive therein a curved intermediate portion of the lead wire 15 so as to avoid the application of excessive stress to the circuit board 10.
  • a portion 18 of the base portion 12 a of the housing 12 is tapered to avoid vertical displacement of the circuit board 10 at the radially opposite side thereof from the housing 12 when the circuit board 10 is fixed to the housing 12 by means of the sole screw 24. Consequently, the motor portion 8, 9 and the rotary member 1-4, on the one hand, and the circuit board 10, on the other hand, are separately assembled into the housing 12 from opposite directions.
  • the lead wire 15 from the assembled motor portion 8, 9 passes through the round hole 16 and is fitted into a peripheral recess 19 ( Figure 4) of the circuit board 10, being guided to the face of circuit board 10 and being connected thereat by welding.
  • a power line 22 which supplies electric power from the outside, is connected to the circuit board 10.
  • the circuit board 10 functions at least to interconnect the lead wire 15 and the power line 22 to each other.
  • the yoke 2 is a hollow cup-shaped member formed by emboss-pressing and thereafter punch-pressing in the same direction while leaving top and bottom edge portions.
  • the thus formed yoke 2 is insert-moulded to form an integrated hollow hub 25 in which the bottom edge portion 2 a of the yoke 2 surrounds the opening of the hollow hub 25.
  • the opening edge 2 b of the hub 25 is made of moulded plastics and is disposed radially outside the bottom edge portion 2 a of the yoke 2.
  • the inner diameter of the hub 25 at the opening edge 2 b is greater than that of the end of the yoke 2 remote from the opening edge 2 b .
  • the shaft 4 is also insert-moulded as a part of the integrated fan member 1.
  • the magnet 3 is formed with a step portion 3 a for positioning it.
  • the magnet 3 is inserted through the bottom opening defined by the bottom edge portion 2 a of the yoke 2 and is fixed to the yoke 2 by adhesive.
  • the thus formed yoke 2, magnet 3 and fan member 1 may be integrally moulded to form the rotary member.
  • the top end portion of an embossed or press-drawn cup-shaped metal member is punch-pressed in the direction of an arrow B parallel to that of the emboss-pressing while leaving a peripheral portion of the top end portion to form the yoke 2.
  • the thus formed yoke is insert-moulded with the hollow hub 25 so that the bottom end portion 2 a of the yoke 2 has an opening diameter which is greater than that of the top end portion of the yoke 2 and which surrounds the opening of the hollow hub 25, as shown in Figure 2. Stated otherwise, plastics material is removed from the opening of the bottom end portion 2 a of the yoke 2.
  • the hollow yoke 2 has a tapered shape such that its internal diameter increases towards the hub opening.
  • the yoke 2 has an end portion 2 c with an opening 2 d therein in which a portion of the hub 25 is mounted.
  • the yoke 2 is provided at its larger end portion with the bottom edge portion 2 a which is radiused to facilitate the introduction into the yoke 2 of the magnet 3.
  • the motor portion 8,9 and the rotary portion of the fan including the shaft 4 are successively introduced into the housing 12 from the same direction.
  • the circuit board 10 is assembled into the housing 12 from the opposite direction (i.e. from the bottom side as shown in Figure 2).
  • the yoke 2 may be formed by embossing or by drawing and punching in the same press direction.
  • the opening edge portion of the fan hub is curved outwardly so as to easily enable the insertion of the magnet 3 into the yoke 2.
  • the yoke 2 has a top end portion having a sheared edge arranged inside the inner diameter of the yoke, and a bottom end portion having a sheared edge arranged outside the outer diameter of the yoke.
  • the motor or drive portion 8,9 and the rotary member 1-4, on the one hand, and the circuit board 10, on the other hand, are separately sub-assembled, and are inserted into the upper and lower sections, respectively,of the housing 12 from opposite directions so as to achieve the following advantages.
  • the respective components are efficiently assembled together to simplify production control. Specifically, sub-assembling of the motor portion 8, 9 and the rotary member 1-4 can be carried out without disturbing production on the circuit board assembly line.
  • circuit board 10 The effective space provided on the circuit board 10 is increased and cheap electronic components of large size having general utility can be utilized. The flexibility of circuit and pattern design is thus increased. In addition to advantages such as the increased ease of assembly of the circuit, the circuit board 10 has sufficient space for the mounting of components such that the circuit board 10 can be provided at its central portion with a small hole 23 ( Figure 4) through which the stopper washer 21 can be removed so as to detach the rotational member 1-4 while leaving the circuit board 10 as it is.
  • the Hall device 13 is accurately positioned by means of the guiding effected through the rectangular hole 14 to ensure magnetic coupling between the Hall device 13 and the core 9 of the motor portion 8, 9.
  • the lead wire 15 is temporarily fitted into the peripheral recess 19 and the end portion of the lead wire 15 is connected to the circuit board 10 so as to simplify the connecting process.
  • the yoke 2 is formed by embossing or drawing press work and punching press work in the same direction and the edge portion 2 a surrounding the fan hub opening is curved radially outwardly, the number of working steps is reduced so as to reduce the production costs of the yoke 2 and so that the insertion of the magnet 3 into the yoke 2 can be simplified.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Claims (5)

1. Un ventilateur à écoulement axial comprenant un organe tournant (1-4, 25) équipé d'un organe de ventilation (1); une partie de moteur (8, 9) d'un moteur électrique, destinée à faire tourner l'organe tournant (1-4, 25); une plaquette de circuit (10) qui porte un ou plusieurs composants électroniques (20), pour commander le fonctionnement de la partie de moteur (8, 9); et un boîtier (12) ayant une partie de boîtier (12a) d'un côté de laquelle l'orgare tournant (1-4, 25) et la partie de moteur (8, 9) sont montés, la plaquette de circuit (10) étant montée du côté opposé de la partie de boîtier (12a), le ventilateur à écoulement axial ayant été assemblé par l'introduction de l'organe tournant (1-4, 25) et de la partie de moteur (8, 9) dans le boîtier (12), par le côté mentionné en premier, et par l'introduction de la plaquette de circuit (10) dans le boîtier (12) par le côté opposé, caractérisé en ce que l'organe tournant (1-4, 25) comprend un moyeu de ventilateur creux (25) ayant une ouverture à une extrémité, et une culasse creuse (2) qui est disposée à l'intérieur du moyeu (25), la culasse creuse (2) ayant une forme tronconique telle que son diamètre intérieur augmente en direction de l'ouverture du moyeu, le diamètre intérieur (2b) de l'ouverture précitée du moyeu de ventilateur (25) étant supérieur à celui de l'extrémité de la culasse (2) qui est éloignée de l'ouverture précitée.
2. Un ventilateur à écoulement axial selon la revendication 1, caractérisè en ce que la culasse (2) est mise en place dans le moyeu de ventilateur (25) par une opération d'insertion par moulage.
3. Un ventilateur à écoulement axial selon la revendication 1 ou 2, caractérisé en ce que la culasse (2) a une forme de cuvette ayant une partie d'extrémité (2c) présentant une ouverture (2d) dans laquelle est montée une partie du moyeu (25).
4. Un ventilateur à écoulement axial selon la revendication 1, caractérisé en ce que le moyeu (25) et la culasse (2) sont moulés ensemble pour former une structure intégrée.
5. Un ventilateur à écoulement axial selon l'une quelconque des revendications précédentes, caractérisé en ce que la culasse (2) comporte, dans sa partie d'extrémité de plus grande dimension, une surface arrondie (2a) ayant pour but de faciliter l'introduction dans la culasse (2) d'un aimant (3) qui fait partie de l'organe tournant (1-4, 25).
EP19880309047 1987-10-01 1988-09-29 Ventilateur axial Expired EP0310391B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP15089887U JPH0158278U (fr) 1987-10-01 1987-10-01
JP248845/87 1987-10-01
JP150898/87U 1987-10-01
JP24884587A JPH0192599A (ja) 1987-10-01 1987-10-01 軸流ファンモータの構造

Publications (3)

Publication Number Publication Date
EP0310391A2 EP0310391A2 (fr) 1989-04-05
EP0310391A3 EP0310391A3 (en) 1990-05-09
EP0310391B1 true EP0310391B1 (fr) 1992-05-27

Family

ID=26480337

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19880309047 Expired EP0310391B1 (fr) 1987-10-01 1988-09-29 Ventilateur axial

Country Status (2)

Country Link
EP (1) EP0310391B1 (fr)
DE (1) DE3871480D1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104113179A (zh) * 2013-04-17 2014-10-22 山洋电气株式会社 风扇电动机

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3939738A1 (de) * 1989-12-01 1991-06-06 Telefunken Electronic Gmbh Elektromotor mit einem luefterrad zum ansaugen von kuehlluft fuer kraftfahrzeuge
DE4113198A1 (de) * 1991-04-23 1992-10-29 Oplaender Wilo Werk Gmbh Elektromotor, insbesondere spaltrohrmotor fuer eine kreiselpumpe oder einen luefter
DE4115485A1 (de) * 1991-05-11 1992-11-12 Mulfingen Elektrobau Ebm Antriebseinheit fuer doppelluefter
GB2285541B (en) * 1994-01-05 1997-04-16 Alex Horng Electric fans and method of assembly thereof
JP2001304199A (ja) * 2000-04-19 2001-10-31 Minebea Co Ltd 送風機
JP3482373B2 (ja) * 2000-04-28 2003-12-22 ミネベア株式会社 送風機
DE10063619B4 (de) * 2000-12-20 2010-02-18 Trw Automotive Electronics & Components Gmbh & Co. Kg Antriebseinheit für Gebläse in Fahrzeugen
CN1900536B (zh) * 2005-07-18 2010-08-11 台达电子工业股份有限公司 风扇及其扇框
CN101504012B (zh) * 2008-02-04 2012-01-04 台达电子工业股份有限公司 风扇

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2462596A1 (fr) * 1979-07-25 1981-02-13 Paris & Du Rhone Perfectionnements aux organes tournant en matiere plastique tels que les ventilateurs
EP0066158A1 (fr) * 1981-05-21 1982-12-08 Nissan Motor Co., Ltd. Ventilateur pour unité de refroidissement d'un moteur automobile
US4663549A (en) * 1984-06-29 1987-05-05 Canon Kabushiki Kaisha Fan motor with a fan frame formed in part by a portion of a motor base

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104113179A (zh) * 2013-04-17 2014-10-22 山洋电气株式会社 风扇电动机

Also Published As

Publication number Publication date
EP0310391A2 (fr) 1989-04-05
DE3871480D1 (de) 1992-07-02
EP0310391A3 (en) 1990-05-09

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