CN103872828A

CN103872828A - Axial flow fan

Info

Publication number: CN103872828A
Application number: CN201310676954.XA
Authority: CN
Inventors: 高桑宗仙; 洼田光孝
Original assignee: Sanyo Electric Co Ltd
Current assignee: Sanyo Electric Co Ltd
Priority date: 2012-12-18
Filing date: 2013-12-12
Publication date: 2014-06-18
Also published as: PH12013000371A1; JP2014121210A; TW201431252A; US20140169969A1

Abstract

The present invention provides an axial flow fan capable of reliably maintaining a film conductive line of the coil. Even when unexpected load is added to the film conductive line, fracture of the line can be prevented. The axial flow fan is provided with conductive pins capable of being automatically cut off corresponding to the film conductive line finishing winding. The conductive pin is configured to electrically connect a coil of a stator and a circuit board, and to hold a film conductive line of the coil. In the conductive pin, one end is fixed to an electrical insulator covering a core stack of the stator, and the other end is electrically connected to the circuit board. The conductive pin is a quadrangular prism pin as a basic configuration and has, in at least a part of a portion exposed from the electrical insulator, a reduced diameter portion having no corners.

Description

Aerofoil fan

Technical field

The present invention relates to aerofoil fan, it is for to by coil with circuit substrate is electrically connected and the structure of the conductor pin of the film wire of hold-in winding (epithelium Guide Line) is improved.

Background technology

In the small-sized aerofoil fan such as cooling fan, as the rotating driving device of impeller, conventionally use outer-rotor brushless motor.Outer-rotor brushless motor, using the armature with polyphase winding as stator, arranges the excitation division with permanent magnet, as rotor in the periphery of this stator.

The coiling top portion of the coil of each phase and coiling terminal part, be electrically connected with circuit substrate via the conductive pin being fixed on the insulator of stator core.In addition,, be bound in conductive pin and keep the coil connecting line of tying (crossing り Line) each other in order to form the coil of each phase.

As the technology of the aerofoil fan about thering is conductor pin, a kind of technology is disclosed,, make conductive pin connect at least one party who is held in first, second insulator that clamps stator core, overhang is electrically connected with an end of conductive pin, and, the other end of conductive pin is inserted to the hole portion of circuit substrate and is electrically connected (for example,, with reference to patent documentation 1).

In addition, a kind of aerofoil fan is disclosed,, each leading section of multiple teeth asymmetricly forms in circumferential length difference and left and right, in the shorter side's of leading section side, connect airtight and dispose the terminal maintaining part that plants terminal pins on insulator, tie up the end of coil in one end of terminal, at other end electrical connection circuit substrate (for example,, with reference to patent documentation 2).

Look-ahead technique document

Patent documentation

Patent documentation 1:(Japan) Unexamined Patent 6-253482 communique

Patent documentation 2:(Japan) JP 2011-182612 communique

But existing aerofoil fan adopts the conductive pin of cylindric or quadrangular shape.

Owing to there not being corner angle on columned conductive pin, even additional less desirable load, the film wire that is bound in conductive pin is also difficult for broken string.

On the contrary, do not exist the frictional force of columned conductive pin of corner angle little, the film wire that is bound in conductive pin is easily staggered.Therefore,, because of the wire diameter difference of film wire, in winding process, can not keep being bound in the film wire of conductive pin.In addition, in the case of using automatic coil winding machine automatically to cut off the film wire that finishes coiling, because being utilizes the corner angle of conductive pin to cut off, therefore can not automatically cut off with columned conductive pin, film wire must be with manually cutting off.

On the other hand, the conductive pin of quadrangular shape, owing to there are corner angle, can use automatic coil winding machine automatically to cut off the film wire that finishes coiling.In addition, can utilize the frictional force of the corner angle of conductive pin to keep being bound in the film wire of conductive pin.

On the contrary, because the conductive pin of quadrangular shape exists corner angle, if additional less desirable load, the film wire that is sometimes bound in conductive pin will be broken by the corner angle of this pin.

The technology of patent documentation 1 and 2, improves by the connection structure of the film wire to conductive pin (terminal pins) and coil, has prevented the cut-out of film wire.But even if applied the technology of patent documentation 1 and 2, the trouble that the cross sectional shape of conductive pin causes can occur equally.

Summary of the invention

The object of the present invention is to provide a kind of aerofoil fan, it has conductive pin, described conductive pin is the film wire of hold-in winding reliably, even the additional less desirable load of film wire is also difficult for causing broken string, and can be corresponding to the automatic cut-out that finishes the film wire of reeling.

For reaching the aerofoil fan of the present invention of above-mentioned purpose, possess the stator with polyphase winding and the rotor with permanent magnet.This aerofoil fan has for by above-mentioned coil with circuit substrate is electrically connected and the conductive pin of maintainer tie lines circle connecting line each other.

Above-mentioned conductive pin one end is fixed on the electrical insulator of the magnetic core array that covers said stator, and the other end is electrically connected with foregoing circuit substrate.

The shape of above-mentioned conductive pin is taking quadrangular pin as basic body, and has the reducing diameter part of the corner angle that do not have described quadrangular pin at least a portion of the exposed portions serve of exposing from above-mentioned electrical insulator.

Invention effect

According to the present invention, the shape of conductive pin is using quadrangular as basic configuration, and has the reducing diameter part of the corner angle that do not have quadrangular pin at least a portion of the exposed portions serve of exposing from electrical insulator.Owing to there not being the corner angle of quadrangular pin at reducing diameter part, so, even to the additional less desirable load of the film wire of coil, be also difficult for causing the broken string of film wire.

The exposed portions serve except reducing diameter part of conductive pin is the quadrangular shape that has corner angle, so utilize these corner angle can keep reliably the film wire of tying up.In addition, utilize the corner angle of the exposed portions serve except reducing diameter part of conductive pin can finish the automatic cut-out of the film wire of reeling.

Brief description of the drawings

Fig. 1 is the cutaway view of the aerofoil fan of present embodiment;

Fig. 2 is the stereogram of the stator of present embodiment;

Fig. 3 is the stereogram of the conductive pin of present embodiment;

Fig. 4 is the stereogram that the conductive pin of present embodiment is fixed on to the state on electrical insulator;

Fig. 5 is the stereogram of having tied up the state of film wire on the conductive pin of present embodiment;

Fig. 6 a is the stereogram of the position relationship of the conductive pin of present embodiment;

Fig. 6 b is to provide the figure describing for the situation of tying up of tying up film wire to conductive pin;

Fig. 6 c is to provide the figure describing for the situation of tying up of tying up film wire to conductive pin;

Fig. 6 d is to provide the figure describing for the situation of tying up of tying up film wire to conductive pin.

Description of symbols

1 aerofoil fan,

50 rotors,

51 permanent magnets,

60 stators,

61 coils,

62 magnetic core arrays,

65 film wires,

80 electrical insulators,

90 circuit substrates,

100 conductive pins,

110 exposed portions serve,

120 reducing diameter parts,

130 parts except reducing diameter part,

131 corner angle.

Embodiment

Below, with reference to accompanying drawing, the aerofoil fan of present embodiment is described.

The aerofoil fan of present embodiment, the shape of its conductive pin is taking quadrangular (quadrangular pin) as basic configuration, and has the reducing diameter part of the corner angle that do not have this quadrangular pin at least a portion of the exposed portions serve of exposing from electrical insulator.According to present embodiment, can realize the aerofoil fan with conductive pin, this conductive pin is the film wire of hold-in winding reliably, even the additional less desirable load of film wire is also difficult for causing broken string, and, can be corresponding to the automatic cut-out that finishes the film wire of reeling.It should be noted that, in the present embodiment, although the basic configuration of conductive pin is set as to the quadrangular of the interior angle with 90 °, but the basic configuration of conductive pin can be also the triangular prism with the interior angle that is less than 90 °, or it can be also the polygon that at least one corner angle has 90 ° of following interior angles.The reducing diameter part of present embodiment is the ultimate range radially of the conductive pin except reducing diameter part to be reduced and the part that forms, and is interior angle polygon-shaped with the angle that is greater than 90 °, or does not have the toroidal of corner angle.

(structure of aerofoil fan)

First,, with reference to Fig. 1～Fig. 5, the structure of the aerofoil fan to present embodiment describes.Fig. 1 is the cutaway view of the aerofoil fan of present embodiment.Fig. 2 is the stereogram of the stator of present embodiment.

As shown in Figure 1, aerofoil fan 1 is the rotation by being arranged on the impeller 20 on rotating shaft 10, carry out from an axial side of rotating shaft 10 air-breathing, to the spue air-supply arrangement of fluid of this axial the opposing party.Aerofoil fan 1 has simple structure, static pressure is little but feature that air quantity is large for example, is used to the cooling fan of the electronic equipment such as server or personal computer etc.

Aerofoil fan 1 possesses the impeller 20 that is arranged on rotating shaft 10, (is designated hereinafter simply as " cover ") 40 as the venturi cover of the outer radial periphery of the motor 30 of the rotating driving device of this impeller 20, wound impeller 20.

Impeller 20 has the hub portion 21 of cup-shaped at central portion.Around hub portion 21, to radiate wire one, multiple blades 22 are installed.Each blade 22 is with respect to the axioversion of rotating shaft 10.

Motor 30 is located at the inside of hub portion 21.Motor 30 possesses: have permanent magnet 51 the outside rotors 50 as excitation division, be wound with the inside stator 60 as armature of heterogeneous coil 61.

Rotor 50 possess two sections of cup-shapeds rotor yoke 52, be pressed into the rotating shaft 10 of the Embedded Division 53 at rotor yoke 52 centers, and permanent magnet 51 etc.Stator 60 possesses magnetic core array 62 and is housed inside coil 61 in the notch 64 of this magnetic core array 62 etc.

Rotor yoke 52 is embedded in hub portion 21.Be fixed with permanent magnet 51 at the inner peripheral surface of rotor yoke 52.Rotor yoke 52 has the magnetic line of force of sealing from excitation division, so that the electromagnetic induction effect of permanent magnet 51 reaches maximum effect.Also have in addition and prevent that the peripheral equipment of motor 30 is subject to the effect of the impact in the magnetic field of electromagnetic induction generation.

As the constituent material of rotor yoke 52, for example, use the magnetic of the iron systems such as SC material, but be not limited to illustrational material.

Rotating shaft 10 is rotatably mounted by bearing 70.Bearing 70 is fixed in the inner face of cylinder-shaped bearing support 71.Bearing support 71 is formed at the central authorities of bottom 73.

Stator heap 62 is fixed in the outer surface of bearing support 71.The permanent magnet 51 of stator heap 62 and rotor yoke 52 separates gap and subtend.

Stator heap 62 is that the thin metal plate of cross ring-type is stacked multiple and form in thickness of slab direction.As the constituent material of stator heap 62, for example, the preferred silicon steel sheet in order to take into account performance and cost.The insulating material such as for example coated varnish of each metallic plate of stator heap 62 are with stacked.

As shown in Figure 1 or 2, on stator heap 62, be formed with tooth 63(as the protuberance for winding around 61 with reference to Fig. 2).In 63,63, tooth, divide the notch 64 being formed with as the recess for holding coil 61.Tooth 63 and notch 64 arrange along the circumferencial direction equalization of stator heap 62.

In the present embodiment, in order to form the coil groups of two-phase, for example, be formed with respectively tooth 63 and notch 64 everywhere at the circumferencial direction of stator heap 62, but the quantity of the number of phases of coil 61, tooth 63 and notch 64 does not limit.

Each notch 64 is interior with electrical insulator (insulator) 80 coverings.That is, be wrapped in coil 61 on tooth 63 around, cover with electrical insulator 80.As electrical insulator 80, for example, adopt synthetic resin.

There is circuit substrate 90(with reference to Fig. 1 at bottom 73 upper supports).On circuit substrate 90, be formed with the Wiring pattern for Control Shaft flow fan 1.

On the electrical insulator 80 around coil 61, be fixed with conductive pin 100.In the suitable portion of tooth of electrical insulator 80, be provided with the pin fixed part 81 for fixing conductive pin 100.Pin fixed part 81 is towards axial foreign side projection.For the pin fixed part 81 of present embodiment, for example, be provided with pin fixed part 81 in the three suitable portions of place's tooth of electrical insulator 80, but be not limited to this.

(structure of conductive pin)

Then, with reference to Fig. 1～Fig. 5, the structure of the conductive pin to present embodiment describes.Fig. 3 is the stereogram of the conductive pin of present embodiment.Fig. 4 is the stereogram that the conductive pin of present embodiment is fixed on to the state on electrical insulator.Fig. 5 is the stereogram of having tied up the state of film wire on the conductive pin of present embodiment.

As shown in Figures 1 and 2, one end of conductive pin 100 is fixed in the pin fixed part 81 of electrical insulator 80.As shown in Figure 1, the other end of conductive pin 100 by break-through in the through hole 91 of circuit substrate 90, by 92 electrical connections such as grade of soldering portion.

As the constituent material of conductive pin 100, for example, use the metal material of the excellent electric conductivity such as copper.

As shown in Figure 3, the shape of conductive pin 100 is using quadrangular pin as basic configuration.Conductive pin 100 has the reducing diameter part 120 of the corner angle that do not have quadrangular pin in axial at least a portion.That is, the conductive pin 100 of present embodiment has the reducing diameter part 120 of the corner angle that reamed quadrangular pin at axial pars intermedia, but is not limited to this, also can have reducing diameter part 120 by multistage shape.

The reducing diameter part 120 of present embodiment for example carries out mechanical presses with facility such as cramping machines by the corner angle of the conductive pin of quadrangular 100 and forms.The formation method that reams the reducing diameter part 120 of corner angle does not limit, and can use cutting to wait other means to form, but extruding is that processing is simple.

As shown in Figure 4, one end of conductive pin 100 lays fixed in the pin fixed part 81 of electrical insulator 80.Conductive pin 100 is being fixed under the state on electrical insulator 80, and conductive pin 100 is along axially the arranging of rotating shaft 10 (with reference to Fig. 1).

The reducing diameter part that does not have corner angle 120 of conductive pin 100 is disposed at least a portion of the exposed portions serve 110 of exposing from the pin fixed part 81 of electrical insulator 80.The reducing diameter part 120 of present embodiment is positioned at the base end part (root) of the exposed portions serve 110 of exposing from electrical insulator 80.

Because reducing diameter part 120 is positioned at the base end part of the exposed portions serve 110 of conductive pin 100, therefore, also the side of imbedding of this conductive pin 100 all can be formed with reducing diameter part 120.In order to prevent that conductive pin 100 from extracting out from electrical insulator 80, preferably as shown in Figure 3, form reducing diameter part 120 at the pars intermedia of conductive pin 100.

As shown in Fig. 2 and Fig. 5, the film wire 65 of coil 61 is tied the other end that is held in conductive pin 100.For the film wire 65 of coil 61, the exposed portions serve beyond the reducing diameter part of the exposed portions serve 110 of conductive pin 100 starts to tie up film wire 65, finishes to tie up at the reducing diameter part 120 of base end side.Or, for the film wire 65 of coil 61, starting to tie up film wire 65 from the reducing diameter part 120 of the base end side of conductive pin 100, the part 130 beyond the reducing diameter part of front finishes to tie up.

As the film wire 65 of coil 61, for example, use the film copper cash such as enamelled wire.

As shown in Figures 1 and 5, the film wire 65 of coil 61 is being banded under the state of conductive pin 100, the through hole 91 of these conductive pin 100 break-through circuit substrates 90, is electrically connected by soldering portion 92 grades.

［ effect of aerofoil fan ］

Then,, with reference to Fig. 1, Fig. 6 a～6d, the effect of the aerofoil fan 1 to present embodiment describes.

As shown in Figures 1 and 2, in the aerofoil fan 1 of present embodiment, starting coiling and finishing the end of reeling of the film wire 65 of the coil 61 of each phase, is banded in the exposed portions serve 110 of the conductive pin 100 being fixed on electrical insulator 80.Tie up the conductive pin 100 of this film wire 65, the through hole 91 of break-through circuit substrate 90, and be electrically connected by soldering portion 92 etc.

In addition,, be similarly tied and be held on conductive pin 100 the coil connecting portion of the film wire 65 of tying each other in order to form the coil 61 of each phase.

As shown in Figure 5, film wire 65 is tied the exposed portions serve 110 that is held in conductive pin 100.Specifically, film wire 65 starts to tie up from the part except reducing diameter part 130 of the front of the exposed portions serve 110 of conductive pin 100, finishes to tie up at the reducing diameter part 120 of base end side.Or film wire 65 starts to tie up from the reducing diameter part 120 of the base end side of the exposed portions serve 110 of conductive pin 100, finish to tie up in the part except reducing diameter part 130 of front.No matter which step to tie up film wire 65 by, can both enjoy reducing diameter part 130 both sides' that have the part except reducing diameter part 130 of corner angle 131 and do not have corner angle 131 character.

Then,, with reference to Fig. 6 a～6d, the coil winding step of present embodiment is described.Fig. 6 a is the stereogram of the position relationship of the conductive pin of present embodiment, and Fig. 6 b～Fig. 6 d is to provide the figure describing for the situation of tying up of tying up film wire to conductive pin.

As shown in Figure 6 b, tie up film wire 65 from the leading section of conductive pin 100a towards base end side.The beginning position of tying up of film wire 65 is reducing diameter part part 130 in addition, and has corner angle 131(with reference to Fig. 4).

Tie up film wire 65 until the reducing diameter part 120 of the base end side of conductive pin 100a finishes, afterwards, be wound around film wire 65 and form coil 61 to the tooth 63 of magnetic core array 62.Not existing the reducing diameter part 120 of corner angle 131, film wire 65 to tie up end (with reference to Fig. 4), to tooth 63 transition.

Finish, after winding around 61 on the tooth 63 at one or two places, as shown in Fig. 6 c, on next conductive pin 100b, to tie up film wire 65.What the film wire 65 that tooth 63 transition of operation come was in the past tied up to conductive pin 100b starts to reducing diameter part 120.

Film wire 65 is lashed to after the front of conductive pin 100b, is again lashed to the base end part of this conductive pin 100b.Be lashed to the film wire 65 of the base end side of conductive pin 100b, form coil 61 to next tooth 63 transition.

On all teeth 63, form after coil 61 end, as shown in Fig. 6 d, on conductive pin 100c, tie up film wire 65.Make film wire 65 be lashed to leading section from the base end side forward end side shifting of conductive pin 100c always, finish winding working procedure.The transition portion of film wire 65 tooth 63 that start to tie up and front operation is the reducing diameter part 120 that does not have corner angle 131, the leading section that film wire 65 is tied up end become there is the part 130(except reducing diameter part of corner angle 131 with reference to Fig. 4).

According to present embodiment, as shown in Figures 3 and 4, the shape of conductive pin 100 is using quadrangular as basic configuration.In at least a portion of the exposed portions serve of exposing from electrical insulator 80 110 of this conductive pin 100, there is the reducing diameter part 120 of the corner angle that do not have quadrangular.

, reducing diameter part 120 waits to be processed into by extruding does not have corner angle.Owing to not having corner angle at this reducing diameter part 120, even therefore to the additional less desirable load of the film wire 65 of coil 61, be also difficult for causing the broken string of the film wire 65 that is bound in conductive pin 100.

For there is the quadrangular shape of corner angle 131 in the part except reducing diameter part 130 of the exposed portions serve 110 of conductive pin 100.Thereby, utilize the corner angle 131 of part 130 except this reducing diameter part, can keep being reliably bound in the film wire 65 of conductive pin 100.

Reducing diameter part 120 is positioned at the base end part (root) of the exposed portions serve 110 of conductive pin 100.Thereby, be bound in the film wire 65 of the reducing diameter part 120 of exposed portions serve 110, because the part except reducing diameter part 130 of front expands with respect to this reducing diameter part 120, be drawn out of so can not depart from reducing diameter part 120.

In addition, by utilizing the corner angle 131 of the part except reducing diameter part 130 of exposed portions serve 110 of conductive pin 100, use automatic coil winding machine just can finish the automatic cut-out of the film wire 65 of coiling.

Above, preferred forms of the present invention is illustrated, but these execution modes being the examples for explanation of the present invention, is not in the meaning of these execution modes by circumscription of the present invention.The present invention can, not departing from the scope of its aim, implement with variety of way different from the embodiment described above.

Claims

1. an aerofoil fan, it comprises that the stator with polyphase winding and the rotor with permanent magnet, described aerofoil fan have for by described coil and circuit substrate electrical connection and keep the conductor pin of the film wire of described coil, wherein,

The electrical insulator of the magnetic core array that covers described stator is fixed in one end of described conductive pin, and the other end of described conductive pin is electrically connected on described circuit substrate,

The shape of described conductive pin is taking prism pin as basic configuration, and has the reducing diameter part of the corner angle that do not have described prism pin at least a portion of the exposed portions serve of exposing from described electrical insulator.

2. aerofoil fan as claimed in claim 1, wherein, described reducing diameter part is the part that the ultimate range radially of the conductive pin except described reducing diameter part is reduced.

3. aerofoil fan as claimed in claim 2, wherein, described reducing diameter part be have the angle that is greater than 90 ° interior angle polygon or there is not the circle of corner angle.

4. aerofoil fan as claimed in claim 1, wherein, described prism pin be shaped as quadrangle or triangle.

5. aerofoil fan as claimed in claim 1, wherein, is being fixed on described conductive pin under the state of described electrical insulator, and described reducing diameter part is positioned at the base end part of described exposed portions serve.

6. aerofoil fan as claimed in claim 1, wherein, described film wire is tied the described exposed portions serve that remains on described conductive pin,

Described film wire is started to tie up by the part except described reducing diameter part from described exposed portions serve, and finish to tie up at described reducing diameter part, or described film wire is started to tie up by the described reducing diameter part from described exposed portions serve, and finishes to tie up in the part except described reducing diameter part.