CN1052350C

CN1052350C - Rotor in magneto generator and method of producing thereof

Info

Publication number: CN1052350C
Application number: CN94108646A
Authority: CN
Inventors: 野末裕; 及川诚
Original assignee: Meizi Co ltd
Current assignee: Meizi Co ltd; Mitsuba Corp
Priority date: 1993-07-16
Filing date: 1994-07-16
Publication date: 2000-05-10
Anticipated expiration: 2014-07-16
Also published as: TW335569B; IT1266880B1; ES2103645A1; CN1103998A; ITTO940581A0; ITTO940581A1; KR950004698A; FR2707813A1; ES2103645B1; KR100249680B1; FR2707813B1

Abstract

First expanded parts (37) formed by expansion of a tubular wall of a cover (30) outwards in the radial direction are formed between adjacent magnets (20), so that the magnets (20) are fixed in the radial direction. In the axial direction, a bottom part (31) of the cover (30) is expanded outwards in the radial direction in a state in which an outer collet (32) of the cover (30) is placed in abutting contact with vertex faces (25) of the magnets (20), so that a second expanded part (38) is formed in a space lying between the bottom wall of the yoke and parts of the end faces of the magnets on the bottom wall-side of the yoke.

Description

The rotor of permanent magnet generator and manufacture method thereof

The present invention relates to a kind of rotor of permanent magnet generator, relate more specifically to be suitable for being installed in the fixed structure of the permanent magnet of effectively using in the rotor of permanent-magnetic power generator on small-sized or special vehicle such as motorcycle and the light-duty vehicle.

Usually, in small-sized or special vehicle such as motorcycle and light-duty vehicle, has the situation of the permanent magnet generator of using permanent magnet such as ferrite lattice (hereinafter referred to as " magnet ").

Such permanent magnet generator comprises a rotor, wherein a plurality of magnet are arranged and are fixed on the inner periphery of yoke at regular intervals, and the stator that constitutes of the winding in a plurality of radially moulding sections of an iron core, when rotor is rotated around stator by a motor driven, then induce electromotive force in the winding on being arranged at magnetic pole of the stator thus.

Traditionally, the rotor as using in such permanent magnet generator has used a box, and it is to be connected and composed annularly each other by the framework that magnet is placed the upward opening of chamber, and this box is connected on the yoke; Each magnet that magnet is inserted in the box is placed in the chamber, so that magnet is pressed into and is fixed between the partition wall section that is provided with between the placed adjacent chamber; Then, a tubular cover is connected in the inboard of box and magnet, the sealing ring that a resin is done is closely connected on the peripheral edge portion of lid again; And make the roll riveting content that on the excircle at yoke top, forms by roll riveting on sealing ring, therefore a plurality of magnet can form one with yoke.

In addition, as the conventional rotors of such permanent magnet generator, in Japanese patent application publication No. 60-187248 and Japanese patent application publication No. 61-280747 document, description was arranged.

The rotor of this existing permanent magnet generator comprises: an iron basin; Be installed in the magnet in the iron basin inner periphery; Be arranged on the magnet over cap of magnet inner peripheral surface; The space that the placement that is limited by iron basin bottom surface, magnet and magnet over cap adheres to; Pour into a hole of stick, it is arranged on the iron basin bottom surface, the position between iron basin inner peripheral surface and the magnet over cap.

The rotor of above-mentioned permanent magnet generator is to constitute like this: the tubular portion of magnet over cap is pressed on the inner peripheral surface of a plurality of arc-shaped magnets that iron basin inner peripheral surface is provided with; on the end face of closely connected each magnet in open side in a marginal portion of this magnet over cap; in order to regulate moving axially of each magnet; the magnet guard member is fixed on the part of iron basin; the internal diameter that the external shape of the tubular portion of this magnet guard member is done roundly than the layout of each magnet is littler also for tapered; the tubular portion of magnet guard member is protruded in the space between each magnet form expansion, each magnet is securely fixed on the inner peripheral surface of iron basin the fixing of iron basin by the magnet guard member.

In addition; the magnet guard member is when being pressed into; the distortion of this guard member is expanded and has partially absorbed; the tubular portion of magnet guard member is made to smaller and dwindle gradually than the internal diameter of the layout of each magnet circle on the standing part side; the magnet guard member distortion of standing part side magnet guard member reduced, so that can be fixed on the iron basin through standing part reliably.

Now, be described in the manufacture method of a kind of permanent magnet excitation type starter among the Japanese patent application 62-36458.This method is characterised in that: magnet is inserted into the yoke up to magnet from an end of yoke matches with projection on the yoke, at the same time, the magnet cap that will have bottom branch, cylindrical part, coupling part and skirt cover part is pressed into the yoke from the yoke other end, form the first pontes, second coupling part, the 3rd coupling part and first expansion, then, an elastomer that is placed on magnet cap bottom branch side inner periphery is pressed into second expansion of a U font in the cylindrical part that divides near the magnet cap bottom.

In any case, in the rotor of traditional permanent magnet generator, used magnetic box, the assembling man-hour that not only makes part count and workman, the use owing to magnetic box increased, and because magnet will be pressed into the size of the necessary strict controlling magnet of magnetic box, in addition, owing to will absorb the deviation of magnet, magnetic box part and roll riveting content the axial dimension of rotor of permanent-magnetic power generator is increased.

In addition, in the rotor of permanent-magnetic power generator and manufacture method thereof that in the open 60-187248 of Japan Patent, proposes, use a kind of stick, reduced machinability thus.

In addition, in any rotor of permanent-magnetic power generator that in open 60-187248 of Japan Patent and 61-280747, is proposed, the axial location of respective magnets is made on iron basin diapire side, the deviation of each magnet axial dimension is absorbed on the open side of iron basin (yoke), and this has just formed the increase of rotor of permanent-magnetic power generator axial length.In addition, for the stator winding of the placement of the confined space in rotor yoke permanent magnet generator, stator winding is positioned in the open side place that absorbs each magnet axial deviation, therefore the output bias of generator has been increased.

The objective of the invention is to propose a kind of rotor and manufacture method thereof of permanent magnet generator, wherein the fixing of magnet need not use magnetic box and stick, and the axial dimension of rotor is shortened as much as possible.

The present inventor once considered to use the manufacturing permanent magnet excitation type starter described in Japanese patent application 62-36458 and the method for similar device, yet illustrated, when this method is used for the manufacture method of rotor simply, just there is following shortcoming:

(1) because the deviation of elastic component and rotten and because the thickness of lid and the influence of hardness deviation, it is unstable that the radial diffusion of the tubular wall of the lid corresponding with axial stroke is easy to become, and therefore makes the bed knife of magnet become unstable.

(2) make the shape rust of the axial expansion part of magnet location, so make the magnet bed knife step-down of expansion.

(3) compare with axial stroke, the tubular wall of lid radially is difficult to form big expansion.

Secondly, another object of the present invention provides a kind of method of making rotor of permanent-magnetic power generator, and it can get rid of above-mentioned shortcoming (1), (2) and (3).

According to the present invention, a kind of rotor of permanent magnet generator, wherein a plurality of magnet are disposed on the circumference of the yoke of peviform basically at certain intervals, and tubular cover is connected the inboard of magnet, it is characterized in that:

Utilization with the tubular wall of lid radially outwardly the whole length of magnet axially on expand in the space between the adjacent magnets and form first expansion;

The footpath protruding peripheral edge portion that is provided with covering of yoke open side that makes progress closely is pressed on the magnet end face on the yoke open side;

The inner margin portion that is provided with that covers that upwards inwardly stretch out in yoke diapire side in the footpath is fixed on the yoke diapire; And

The tubular wall that utilization makes lid is outwards expanded on the end face part of the diapire side magnet of yoke at least and constitute one or more second expansions in the space between the magnet end face on yoke diapire and yoke diapire side.

In addition, be characterised in that according to the manufacture method of the rotor of a kind of permanent magnet generator of the present invention and may further comprise the steps:

The outside of anchor clamps from the yoke closure wall is inserted into the open-work of doing in advance on the yoke closure wall;

Be placed into a plurality of magnet in the yoke and they are remained on the corresponding anchor clamps;

Lid is inserted into the inboard of magnet, makes the tubular wall outwards expansion radially of lid thus, so that form first expansion in the interval between adjacent magnets;

The inner margin portion of lid is fixed on the closure wall of yoke; And

The tubular wall that makes lid is outwards expanded on the end face part of the closure wall side magnet of yoke at least and constitute one or more second expansions in the space between the magnet end face on yoke closure wall and yoke closure wall side.

Rotor and manufacture method thereof according to permanent magnet generator of the present invention, utilization is with the tubular wall part expansion radially of the lid of yoke closure wall side, make and cover on the end face that peripheral edge portion closely is pressed in magnet, and magnet fixed so that magnet by clamp between (or a plurality of) second expansion of formation on the peripheral edge portion of lid and the tubular wall part at yoke closure wall side cover.Utilize this layout, the peripheral edge portion of each magnet tegmentum is axially outer upwards to be positioned in the same horizontal plane, and the dimensional discrepancy of magnet short transverse is received by the closure wall side draught of yoke, thereby the axial length of the rotor of permanent magnet generator can be shortened.

In addition, according to the present invention, a kind of manufacture method of rotor of permanent magnet generator is characterized in that may further comprise the steps:

A plurality of magnet temporarily are positioned in the yoke, and lid are pressed into the inboard of magnet;

On the tubular wall of the lid on the yoke closure wall side, be provided with inner margin portion and be fixed on the yoke closure wall radially inwardly stretching out; And

Expander tool is placed on the opposite of tubular wall of lid and the corresponding section, space between yoke closure wall and the yoke closure wall side magnet bottom surface, utilize stroke changeable device stroke on will be axially mechanically to change over radially a stroke, described expander tool is radially outwards moved, and the tubular wall part of the lid that expander tool faces toward on the yoke closure wall side is outwards expanded diametrically, therefore the bottom surface side at yoke closure wall place magnet forms one or more axial location parts.

Above-mentioned manufacture method according to rotor of permanent-magnetic power generator of the present invention, one or more axial location of the magnet that expansion forms on the tubular wall of lid partly are to determine with axial stroke, therefore, even when only propagation size is big, this propagation size can be set to pinpoint accuracy easily as requested, and the propagation size of this setting can stably be repeated to create.

In addition, the axial location of magnet partly is to expand formation in a horizontal direction, and propagation size can be arranged on the big only value, and therefore the bed knife that is applied on the magnet by each localization part of axle can be set greatly.

Moreover, the tubular wall of lid and the corresponding part of the closure wall of yoke and the space between this closure wall side magnet end face on radially outwards expanded, so that the peripheral edge portion of lid closely is pressed on the magnet end face, each magnet just is fixed and rises at the peripheral edge portion of lid and partly expand the magnet shaft of formation between localization part at the tubular wall of yoke closure wall side cover thus, therefore the peripheral edge portion of the height tegmentum of each magnet is pressed into uniformly, and the expansion of the dimensional discrepancy of the short transverse of each magnet tegmentum on yoke closure wall side absorbs, so that the axial length of rotor of permanent-magnetic power generator be shortened.

Fig. 1 (a) and 1 (b) expression are according to an embodiment of the rotor of permanent magnet generator of the present invention, and Fig. 1 (a) is cardinal plane figure, and Fig. 1 (b) is the front section view along Fig. 1 (a) Vertical Centre Line b-b;

Fig. 2 (a)-2 (c) represents a yoke, and Fig. 2 (a) is a partial plan layout, and Fig. 2 (b) is the front section view along Fig. 2 (a) Vertical Centre Line b-b, and Fig. 2 (c) is a partial bottom view;

Fig. 3 (a)-3 (c) represents a lid, and Fig. 3 (a) is a partial plan layout, and Fig. 3 (b) is a front section view, and Fig. 3 (c) is a partial bottom view;

Fig. 4 (a)-4 (c) is an embodiment according to the method for manufacturing rotor of a kind of permanent magnet generator of the present invention, and Fig. 4 (a) is that a disintegration perspective view that is cut that covers step is inserted in explanation; Fig. 4 (b) is a perspective view that the part is cut of explanation fixed cap step, and Fig. 4 (c) is the perspective view that the part is cut that step is covered in the explanation expansion;

Fig. 5 is the partial sectional view of an amplification of explanation phase magnet step;

Fig. 6 is the partial sectional view that the tool amplification of covering step is inserted in explanation;

Fig. 7 is the front cross-sectional view of explanation fixed cap step;

Fig. 8 is the front cross-sectional view that step is covered in the explanation expansion;

Fig. 9 (a)-9 (c) each perspective view that to be explanation be cut according to the part of another embodiment of method for manufacturing rotor of a kind of permanent magnet generator of the present invention;

Figure 10 is that explanation is pressed into the partial sectional view of covering step;

Figure 11 is the front section view of explanation fixing step; And

Figure 12 is that explanation forms the front section view of magnet shaft to the step of localization part in lid.

In illustrated embodiment, comprise a yoke 11 according to the rotor of a kind of permanent magnet generator of the present invention, a plurality of magnet 20 and a lid 30.

Yoke 11 integrally constituted have open top peviform basically, that make by magnetic material and the part of bottom side sealing, protrude a magnetic resistance spare 13 on the cylindrical tube wall 12 of yoke 11 radially outwardly, it has predetermined width and length at circumferencial direction and axially.Have an axis hole 15 at center as the closure wall 14 of yoke 11 lower surface, in order to receive a unshowned pillow block that directly is connected with an engine, a pair of circular hole 16 that is used to install the following yoke positioning fixture that will describe is opened in the exterior periphery position concentric with axis hole 15 with 180 ° of angular displacements separately.In addition, a plurality of open-works, the elliptical aperture 17 (being 12 holes in this embodiment) that promptly is used to receive the following magnet positioning fixture that will describe are opened in a circumference with the outer circumferential edges part of the closure wall 14 of the concentric yoke 11 of axis hole 15 at regular intervals.

In the elliptical aperture 17 that in the closure wall 14 of yoke 11, forms, do more greatly, so that form reliable basically spin balancing than other elliptical aperture with the elliptical aperture that magnetic resistance spare 13 distributes in the same side.

In addition, in the bottom surface of the closure wall 14 of yoke 11, be provided with a plurality of projections 18 (being 8 in this embodiment) that are used for fixing lid, they be arranged on axis hole 15 concentric, on a circumference between circular hole group 16 and the elliptical aperture group 17 and in a circumferential direction, arrange that at regular intervals they are the inside axial projection that formed by the each several part from outside punching press closure wall 14.The structure of these projections 18 is such, and promptly they can be punctured in the fixing hole that is located in the lid, are riveted then, just as will be described.

In addition, in the closure wall 14 of yoke 11 near circular hole group 16 with a concentric circumference of axis hole 15 on, circumferencial direction offered at interval with rule a plurality of be used to install cooling fan in establish screw thread hole 19.Have in yoke 11 and be not provided with the riveted joint surplus of rolling on the open edge of tubular wall 12.

Shown in Fig. 1 (a), the height that each magnet 20 has is less than the degree of depth of yoke 11, and is made to whole rectangular parallelepiped protrusion part, has on its Width along the shape of the circular arc basically of yoke 11 inner peripheral surface bendings.Left and right part at the circular arc inner circumferential surface (to call " inner surface " in the following text) of magnet 20 has formed chamfered portion 23 respectively, its inclination mode is close on the external peripheral surface (hereinafter referred to as " outer surface ") 22 for one side chamfered portion 23, and chamfered portion 23 is close on the left and right end parts on the other hand.Height in magnet 20 both sides plays

side

24 and 24 and is made to the tangent line of normal by yoke 11 centers perpendicularly respectively, and its end face 25 is made to bottom surface 26 and is parallel to each other.

Lid 30 is made by metal material, for example by sheet iron through the pull and stretch extruding and made cylindrical shape, so that be forced on the cylinder that constitutes by magnet 20 that below will describe by integral body.Its peripheral edge portion 32 is made to the outwardly directed toroidal that makes progress in an end (hereinafter referred to as " the top ") footpath of lid 30 tubular wall 31.

In addition, before assembling, on the bottom of lid 30 tubular wall, make its inner rim part 33 integrally constitute toroidal.The internal diameter of inner margin portion 33 is arranged diameter of a circles less than being arranged in the yoke 11 group of bumps 18, and this internal diameter is set as equals

circular hole

16 and 16 and arrange the diameter of a circle values or be set as greater than this diameter value.The fixing hole 34 identical with group of bumps 18 numbers (being 8 in this embodiment) of yoke 11 is formed on the radially pars intermedia office of inner margin portion 33, its mode is that corresponding fixing hole 34 is corresponding with the group of bumps 18 of yoke 11 on the position, so that corresponding fixing hole 34 can receive wherein corresponding projection 18.

In addition, shown in Fig. 1 (a) and Fig. 3 (a)-3 (c), cut on the circumference on the inner circumferential edge of part 35 (is 8 at this embodiment) in inner margin portion and be configured semi-circular shape basically so that inner margin portion can not hinder yoke 11 circular hole group 16 and in establish screwed hole group 19.Then, utilize and to comprise that on whole circumference cutting part 35 upwards becomes bent with the inner circumferential edge of inner margin portion 33, strengthens part 36 to form rigidity.Utilize operation of pull and stretch forcing press and similar operation, the inner circumferential edge of the inner margin portion 33 part predetermined height that curves inwardly to whole circumference is diametrically formed this rigidity enhancing part 36, can make like this and cover 30 and press the enough rigidity of Shi Nengyou at the following quilt that will describe.

Manufacture method as the rotor of permanent-magnetic power generator of one embodiment of the invention is described it with reference to the example that uses above-mentioned arrangements of components below.According to this some explanation, do not need at length to be illustrated as the layout of the rotor of permanent-magnetic power generator of one embodiment of the invention.

At first, as Fig. 4 (a) and shown in 5, for the rotor of making permanent magnet generator is placed on yoke 11 on the base 41 of a device 40.In the case, pair of magnetic

yoke positioning fixture

42 and 42 is inserted in a pair of

circular hole

16 and 16 of yoke 11 separately.In addition, make phase magnet on its circumferencial direction anchor clamps (hereinafter referred to as " first anchor clamps of magnet ") 43 and axial location magnet anchor clamps (hereinafter referred to as " second anchor clamps of magnet ") 44 be inserted in the elliptical aperture group 71.

Here, first anchor clamps group 43 of magnet and the second anchor clamps group 44 of magnet are bearing on the base 41 by spring 45 floating grounds separately, thereby can move in vertical direction.Equal the quantity (being 4 in this embodiment) of magnet 20 on the first anchor clamps group, 43 numbers of magnet and be arranged at regular intervals to justify on the circumferencial direction of isodiametric circle with the layout of elliptical aperture group 17.In addition,

shoulder

43a and 43a are formed on the end edge of first anchor clamps, 43 circumferencial direction both sides of corresponding magnet.The number of the second anchor clamps group 44 of magnet (being 8 in this embodiment) equals to go to subtract with the number of magnet 20 number of elliptical aperture group 17, and they are disposed on the circle with the layout circle same diameter of elliptical aperture group 17 and on the both sides of corresponding first anchor clamps 43.

Then, as Fig. 4 (a) and shown in 5, with a plurality of magnet 20 (is 4 at this embodiment) in yoke 11 with arc shooting.Each its bottom surface 26 of magnet 20 usefulness is located on two second anchor clamps 44, its state is that the outer surface 22 of magnet 20 is pressed on the inner circumferential surface of yoke 11, and two sides of magnet 20 overlap mutually with first anchor clamps 43 that are placed on its both sides and 43

shoulder

43a and 43a respectively.Under this state, magnet 20 and is positioned on the gauge of top by

second anchor clamps

44 and 44 and floating ground is bearing in the vertical direction by first anchor clamps 43 location in a circumferential direction.

Subsequently, as Fig. 4 (a) and shown in 6, utilize one to cover instrument 50 and will cover 30 inboards that cover in group of magnets 20.In the case, because have rigidity to strengthen part 36, cover 30 perfect covering so can make at inner margin portion 33 place's structures of lid 30.In covering later state, lid 30 inner margin portion 33 is close on the bottom surface of closure wall 14 of yoke 11, and its peripheral edge portion 32 is close on the end face 25 of group of magnets 20.In addition, after lid 30 is pressed into, between group of magnets 20, constituted first expansion 37, thereby group of magnets 20 can be positioned at circumferencial direction relatively, and lock relatively rotating between them.

Here, covering instrument 50 is to comprise that the downside of less external diameter reaches two cylindrical shapes of the upper side of big external diameter, be made to than the lower part 51 of minor diameter and have the diameter that is substantially equal to cover 30 tubular wall 31 internal diameters, and larger-diameter lower part 52 is made to and has the diameter that is substantially equal to cover 30 peripheral edge portion 32 external diameters.

In the instrument of covering 50, the yoke location hole 53 that its number equals circular hole 16 numbers (being 2 in this embodiment) is constituted in the axial direction respectively.Corresponding yoke positioning fixture 42 relatively is inserted in the corresponding yoke location hole 53, so that cover instrument 50, can locate reliably between yoke 11 and the group of magnets 20.

The jack 54 that on number, equals the number (being 8 in this embodiment) of the projection 18 of yoke 11 be formed in the instrument of covering 50 axially in.In addition, constitute the cannelure 55 of a depression on the bottom surface of the smaller diameter portion 51 of the instrument of covering 50, its mode strengthens part 36 for the rigidity that can make its containment cap 30.Because above-mentioned positioning states, each projection 18 on the position corresponding to jack 54 and be inserted into wherein, and rigidity strengthens part 36 corresponding to cannelure 55 and be inserted into wherein, can be avoided with the conflict between projection 18 and the rigidity enhancing part 36 so that cover instrument 50.

Then, as Fig. 4 (b) and shown in 7, riveting pin is inserted in the jack 54 of the instrument of covering 50, makes thus to insert the protrusion end be through the projection 18 on the yoke of covering in 30 the fixing hole 34 11 and can rivet.In this riveted joint operation, lid 30 whole circumference with its inner rim part 33 are fixed to circlewise by group of bumps 18 on the closure wall 14 of yoke 11, then, remove the instrument of covering 50.In this state, magnet 20 in the location of circumferencial direction and it yoke 11 locked in relative rotation just be implemented.

Then, after removing the instrument of covering 50, one plasticity instrument 60 is inserted into covers 30 inside, as Fig. 4 (c) and shown in 8, utilization will be covered 30 tubular wall 31 and be expanded on the closure wall of yoke and this closure wall side in the space between the magnet end face portion circlewise or tubular wall 31 is expanded at least on the end face part of magnet 20 on the yoke diapire side, to form one or more second expansions 38, magnet 20 is positioned in the axial direction.

Here, plasticity instrument 60 is to comprise that the lower part of less external diameter reaches two cylindrical shapes on the top of big external diameter, be configured than the lower part 61 of minor diameter and have the diameter that is substantially equal to cover 30 tubular wall 31 internal diameters, and larger-diameter top is configured and has the diameter that is substantially equal to cover 30 peripheral edge portion 32 external diameters.

The yoke location hole 63 that on number, equates with the number (being 2 in this embodiment) of circular hole 16 be formed in plasticity instrument 60 axially in.Yoke positioning fixture 42 is inserted in the yoke location hole 63 separately, so that pad property instrument 60 can be located between yoke 11 and the group of magnets 20 reliably.

Structure has the elastomer portion 64 that an interior urethane resin or similar material are done on the end face of plasticity instrument 60 smaller diameter portions, when it between the diapire 14 of the end face of the smaller diameter portion of plasticity instrument 60 and yoke 11 axially during pressurized, then this elastomer portion 64 outwards expansion radially on whole circumference, or expand at least on the end face part of the respective magnets on the yoke diapire side.

Then, when the elastomer portion 64 of plasticity instrument 60 is pressed on the bottom surface of yoke 11 diapires 14 and this elastomer portion 64 radially outwards during expansion deformation, just will cover near the outwards pushing radially inner margin portion 33 of 30 tubular wall 31, cover one or more second expansions 38 of 30 so that on the diapire of yoke and this diapire side, form in the space between the magnet end face portion.

When second expansion 38 of lid 30 forms, plasticity instrument 60 than the bottom surface of major diameter part 62 peripheral edge portion 32 to lower cover 30.Therefore the formation of second expansion 38 is not only to expand partly and is covered 30 tubular wall 31 parts, and is to cause owing to the redundancy section of tubular wall 31 is depressed.Thereby the intensity of second expansion can not make corresponding minimizing of sheet thickness descend because of the expansion deformation owing to this expansion 38.

On the other hand, to depress and cover the bottom surface of 30 peripheral edge portion 32 pressured to the end face 25 of each magnet 20 time when lid 30, it is consistent that the height of each magnet 20 just becomes on the bottom surface of lid 30 peripheral edge portion 32, promptly be on the horizontal plane of plasticity instrument 60 than major diameter part 62 bottom surfaces, this is because each magnet 20 by second anchor clamps of the magnet floating support that makes progress.

Then, the axial compression that is inserted into predetermined length and elastomer portion 64 when plasticity instrument 60 stops, then each magnet 20 just by clamp and be fixed on peripheral edge portion 32 and one or more second expansion 38 between, its state is that the bottom surface of the peripheral edge portion of magnet 20 tegmentums 30 forms consistent height.

Subsequently, plasticity instrument 60 is up taken away from covering 30 inside.Then, yoke 11 is taken off from the top of base 41.Utilize above-mentioned steps, just make rotor of permanent-magnetic power generator as shown in fig. 1.

Fig. 9 to 12 expression is as the manufacture method of the rotor of permanent-magnetic power generator of another embodiment of the present invention.The explanation and the accompanying drawing of corresponding with the foregoing description shown in Fig. 1 to 8 in this embodiment part have been omitted.

In this embodiment, be provided with round tubular wall 31 in the lid 30, the external diameter of this tubular wall 31 is made to the cylindrical internal diameter that constitutes less times greater than group of magnets 20.

Then, in this embodiment,, utilize to cover columniform lid 30 that instrument 50 is a bit larger tham the annulus inner periphery that group of magnets 20 constitutes with its external diameter is pressed into the group of magnets 20 of arranging on the inner periphery of yoke inside as Fig. 9 (a) and shown in 10.

When being pressed into, the part facing to the interval between the

adjacent magnets

20 and 20 on the tubular wall 31 of lid 30 is correspondingly expanded in these intervals, has constituted the localization part 37a of the circumferencial direction of magnet thus.

Here, cover instrument 50 and be made to two cylindrical shapes that the downside that comprises less external diameter reaches the upper side of big external diameter, be made to have than minor diameter lower part 51 and be slightly smaller than the diameter that covers 30 tubular wall 31 internal diameters, have the diameter that equals to cover 30 peripheral edge portion 32 external diameters and be made to than major diameter top 52.

The yoke location hole 53 that equals circular hole 16 numbers (being 2 in this embodiment) on number axially is formed in the instrument of covering 50.Each yoke positioning fixture 42 correspondingly is inserted in separately the yoke location hole 53, so that at the instrument of covering 50, yoke 11 and group of magnets 20 can be located reliably at circumferencial direction.

The jack 54 that equals projection 18 numbers (being 8 in this embodiment) on number axially is formed in the smaller diameter portion 51 of the instrument of covering 50.In addition, on the bottom surface of the smaller diameter portion 51 of the instrument of covering 50 structure have one recessed every cannelure 55, its mode be can containment cap 30 rigidity strengthen part 36.In above-mentioned location form, each projection 18 is corresponding with jack 54 separately and insert wherein, and it is corresponding and insert wherein that rigidity strengthens part 36 and cannelure 55, so that cover instrument 50 and projection 18 can be avoided with the conflict of 36 of rigidity enhancing parts.

Now, when covering 30 when being pressed into group of magnets 20 and in tubular wall 31, forming the localization part 37a of each circumferencial direction, owing to act on and cover the side effect power that the expansion deformation on 30 inner margin portion 33 causes, make the irregular corrugated of inner margin portion 33 easily deformable one-tenth.

But, in this embodiment, inner circumferential edge in inner margin portion 33 partly is deformed and has formed rigidity enhancing part 36, thus, be deformed into undulatory active force even have the inner margin portion of making 33, this rigidity strengthens part 36 these active forces of opposing, so that can stop inner margin portion 33 to be deformed into corrugated brokenly in advance.Thereby fixedly the projection 18 of usefulness penetrates in the fixing hole 34 and is riveted as described later, so that when the inner margin portion 33 of covering 30 was fixed on the diapire 14 of yoke 11, inner margin portion 33 can be fixed, and is not subjected to the adverse effect of irregular deformation perfectly.

Be pressed into the moment of group of magnets 20 inside at lid 30, apply the power of being pressed into or bear reaching by inner margin portion 33 crimping with peripheral edge portion 32 respectively of its active force covering 30, can act on equably on the whole lid 30 so that be pressed into power than major diameter part 52 and smaller diameter portion 51.Owing to be pressed into power uniformly, just can prevent tubular wall 31 axially on produce travers and prevent the irregular deformation of tubular wall 31, thereby just prevented when lid 30 is pressed into that peripheral edge portion 32 and inner margin portion 33 from having problems and also can realize accurate pressing.

In addition, peripheral edge portion 32 is formed in and covers on 30 the top edge, and inner margin portion 33 is formed on the bottom edge, is made by tagger even therefore cover 30, and the tubular wall 31 of lid 30 still can guarantee the rigidity that needs.Thereby, lid 30 inside that are pressed into group of magnets 20 can be carried out smoothly, and circumferential registration part 37a can be formed on adjacent magnets 20 and 20 s' the appropriate section of tubular wall 31 of septal surface perfectly, so that the outer circumference surface that covers 30 tubular wall 31 evenly and closely contacts with circumferential surface in group of magnets 20 whole.

When lid 30 was pressed into the terminal of group of magnets 20 inside, inner margin portion 33 entered into the state that overlays on the bottom surface of yoke 11 diapires 14.Under this state, enter into the state that the respective fixation projection 18 of projection on the bottom surface with the diapire 14 of yoke 11 matches at 34 of each fixing holes opening on the inner margin portion 33.

In this state, as Fig. 9 (b) and shown in 11, a clincher tool 56 is inserted in the jack 54 of the instrument of covering 50, make the protruding end that is inserted in the projection 18 on the yoke of covering in 30 fixing holes 34 11 by riveted thus.

Then, after riveting operation, the whole circumference of lid 30 usefulness its inner rim parts 33 is fixed on the diapire 14 of yoke 11 annularly.

Then, after removing the instrument of covering 50, plasticity instrument 60 is inserted into covers in 30, as Fig. 9 (c) and shown in 12.Utilize this plasticity instrument 60, on the tubular wall 31 inner edge side partly of lid 30, constitute one or more axial location part 38a of magnet 20, its () expands in the interval between the diapire 14 of the bottom surface 26 of group of magnets 20 and yoke, along in the interval between the diapire 14 of magnet bottom surface 26 and yoke, stretch circlewise along magnet bottom surface 26 or the powerful ground of bottom surface portions that makes magnet at least to extrapolation.

Here, plasticity instrument 60 comprises a main body 61a and a control tool 66 that is located at the top side that is located at the bottom side.When plasticity instrument 60 is inserted into the state that covers in 30, main body 61a is in the state on the diapire 14 that is crushed on yoke 11, and have a plurality of expander tool 62a (being 4 in this embodiment) with configuration radially arrange and be slidingly mounted at (being cross shape in this embodiment) on the main body 61a bottom surface radially in.Each expander tool 62a that directly makes progress is in and covers on 30 tubular walls, 31 opposites and the normal direction.

At a chamfered portion 63a who is driven side is a stroke changeable device, its vertical direction ground on the radial inner end part of corresponding expander tool 62a is protruding upward, head portion at each chamfered portion 63a makes an inclined-plane, and the radial outside on inclined-plane is raised.Be between the radially inner side face that one of compressive state compression spring 64a is constrained on each lateral surface of footpath of each chamfered portion 63a and main body 61a.Thereby each corresponding expander tool 62a is radially inwardly being pressed by spring 64a constantly, and is in the stand-by state of retracted position.In addition, in main body 61a, on vertical direction directly over each chamfered portion 63a, have a pilot hole 65.

On the other hand, control tool 66 vertically is connected with main body 61a slidably.It is cylindrical that control tool 66 is made to two of upper side of the downside that comprises less external diameter and big external diameter, be configured to have than the lower part 67 of minor diameter and be smaller than the diameter that covers 30 tubular wall 31 internal diameters, and larger-diameter top 68 is configured and has the diameter that equals to cover 30 peripheral edge portions, 32 external diameters.

Structure has the gathering sill 69 of a depression on the bottom surface of the small diameter portion 67 of control tool 66, and it and small diameter portion 67 arrange with one heart, and makes the excircle of main body 61a and be embedded into slidably on the inner periphery of gathering sill 69.Each chamfered portion 70 in the primary side is another changes stroke devices, it is positioned at the opposite that is driven skew back face portion 63a and stretches to the below, correspondingly structure has an inclined-plane on the lower portion of each chamfered portion of primary side, and the radial outside on this inclined-plane is raised.Then, each chamfered portion 70 on the primary side is penetrated in the corresponding pilot hole 65 in main body 61a slidably, the downward inclined plane of corresponding chamfered portion 70 on the primary side be driven side on the inclined plane that makes progress of corresponding chamfered portion 63a form contacting of slip.

The bottom surface side of lid 30 tubular wall 31 to the state of putting corresponding expander tool 62a under, when control tool 66 presses down, the chamfered portion 63a that is driven side correspondingly relatively slides on the chamfered portion 70 of primary side, so that expander tool 62a outwards pushing diametrically.Because the motion laterally of each

expander tool

62a, 31 outwards expansions diametrically of the tubular wall of the lid 30 on the inner margin portion side are so that the axial location part 38a of magnet is formed circlewise.

When forming with the axial location part 38a expansion of covering magnet in 30, the bottom surface than major diameter part of control tool 66 is depressed into to be covered on 30 the peripheral edge portion 32, thus, make the axial location part 38a of magnet be not only that stretched portion by the end face 26 of magnet 20 and the lid 30 between the inner margin portion 33 forms, and be to form by the redundancy section of depressing tubular wall 31.Thereby just such shortcoming can not occur: the inner margin portion 33 of lid 30 produces breaks, or makes the axial location part 38a of magnet have thin thickness and cause the decline of magnet constant intensity.

On the other hand, when the bottom surface of lid 30 peripheral edge portion 32 contacts with the end face of magnet 20, the height of magnet 20 then enters and form consistent state on the bottom surface of the peripheral edge portion 32 of lid 30, promptly be on the horizontal plane than the bottom surface of major diameter part 68 of control tool 66, this is because each magnet 20 to upper support by the second anchor clamps floating ground of magnet.

In addition, magnet shaft is to decide on by the axial stroke C geometry as the chamfered portion 70 of the inclination angle B of two chamfered portion 63a of stroke changeable device and 70 and primary side to the propagation size A of localization part 38a, and the propagation size that therefore can set only propagation size and this setting as requested can be achieved consistently.

Yet, even propagation size A is located at a big numerical value, the bottom surface than major diameter part 68 of control tool 66 will be covered 30 peripheral edge portion 32 and depress when the axial location of magnet is partly expanded moulding, utilize the redundancy section of depressing tubular wall 30 to make the axial location part 38a moulding of magnet thus, so can not produce following shortcoming: the tubular wall 31 of lid 30 produces and breaks and the axial location part 38a of magnet forms as thin as a wafer wall thickness, causes the decline of magnet constant intensity.

After the axial location part 38a of magnet forms, control tool 66 is mentioned.When control tool 66 was mentioned, corresponding expander tool 62a was radially inwardly withdrawn by corresponding spring 64a.Then, with plasticity instrument 60, comprise that promptly control tool 66 and main body 61a upwards take away from covering 30 inside.Then, again yoke 11 is taken off from base 41.

Utilize above-mentioned step, just produce the rotor of permanent magnet generator shown in Figure 1.Here it is, and each magnet 20 is by clamp and be fixed between the axial location part 38a of peripheral edge portion 32 and magnet, and be in the height that makes magnet and be pressed in the consistent state by peripheral edge portion 32 bottom surfaces of lid 30.

Can obtain following advantage by the above embodiments:

(1) the propagation size A of the axial location part 38a of magnet is by where determining as the axial stroke of the chamfered portion 70 of the inclination angle B of two chamfered portion 63a of stroke changeable device and 70 and primary side is several, consequently, even when only propagation size was a big numerical value, this only size also can set with high accuracy easily and the propagation size of this setting can stably repeatedly be made.

(2) utilize expander tool 62a to form the axial location part 38a of magnet in the horizontal direction, therefore, combine, can make fixedly being set on the big value of axial location part 38a of magnet 20 with above-mentioned (1).

(3) partly constitute rigidity at the inner circumferential edge of lid 30 inner margin portion 33 and strengthen part 36, thus, even when lid 30 power that are pressed into the inside of magnet 20 are easy to make inner margin portion 33 to be deformed into corrugated, this rigidity strengthens part 36 is enough to resist this power, can stop inner margin portion 33 to be deformed into corrugated brokenly.Thereby the inner margin portion 33 of lid 30 can be fixed on the diapire 14 of yoke 11 perfectly.

(4) lid 30 tubular wall 31 is extended in the interval between

adjacent magnets

20 and 20 and has been formed uniformly radial location part 37a on the whole length of axial magnet, therefore each magnet 20 can be positioned reliably in a circumferential direction.In addition, utilize to external diameter respectively to extend in the peripheral edge portion 32 that cover on 30 tip edge and constitute magnet shaft to localization part 38, just can omit that use is bonding to fix magnet by inner margin portion 33 sides of the tubular wall 31 of lid 30.

(5) because above-mentioned (4), just can cancel the roll riveting surplus and the sealing ring at yoke 11 open end edges, the deviation of magnet axial height can be absorbed at the magnet bottom surface side, and the variation of magnet axial height can be eliminated in the yoke open side, produces the axial length of the rotor of permanent-magnetic power generator of shortening thus.

(6) owing to above-mentioned (5), stator core and magnet can be maintained on the axial constant position of relative rotor of permanent-magnetic power generator open end, but so that the output variation Be Controlled of permanent magnet generator.

The present invention is not limited on the above embodiments, and can make various modification in scope of the present invention.

For example, from the structure of magneto, form the elliptical aperture of the positioning fixture that receives magnet near the diapire the tubular wall of yoke because of difficulty, so can use magnetic holder to come fixed magnet similarly.

As previously discussed, can obtain following advantage according to the present invention:

(1) utilizes the tubular wall with lid axially between adjacent magnets, radially to form first expansion to external expansion, and make magnet diametrically fixing; And at the part of the tubular wall of the lid of yoke diapire side or many parts radially to external expansion, so that the peripheral edge portion of lid contacts with the end face of magnet, magnet is in by clamp axially in the state between the peripheral edge portion of lid and one or more second expansions in the tubular wall part formation of yoke diapire side cover.

(2) because above-mentioned (1), the peripheral edge portion of the height and position tegmentum of each magnet is pressed into unanimously, and the deviation of magnet short transverse size is absorbed in yoke diapire side, thereby the axial length of rotor of permanent-magnetic power generator can be shortened.

(3) owing to above-mentioned (1), can cancel magnetic box, thereby the number of part and the number of workman's operating time can be reduced. And can cancel the step that magnet is pressed into magnetic holder, thereby the stringency of controlling magnet size is alleviated. In addition, because the thickness of cancellation sealing ring can make the axial length of rotor of permanent-magnetic power generator be shortened.

(4) owing to above-mentioned (1), can cancel the roll riveting surplus at the yoke open end, therefore the axial length of rotor of permanent-magnetic power generator is further shortened.

(5) because above-mentioned (2), (3) reach (4) item, magnet and stator core can be maintained on the axial constant position with respect to the rotor of permanent-magnetic power generator open end, thereby the deviation of magneto performance can be controlled.

Group of magnets was in by the state of the temporary transient location of anchor clamps when (6) cover was pressed into the inside of group of magnets, thereby the pressurization in the lid operation can be stablized and carried out.

When (7) dividing the expansion moulding in the bottom of the tubular wall that covers, cover is depressed, and wall part to be expanded is that the upper part from wall provides, thereby has just prevented that excessive tension force from acting on the tubular wall part of lid, and makes the stress decrease of second expansion of lid.

(8) in addition, according to the present invention, where expand the magnet shaft that forms at the tubular wall of lid determines by axial stroke is several to localization part, therefore even when only propagation size is a big size, this propagation size also is easy to accurately be set, and the propagation size of this setting can stably be repeated to generate.

(9) moreover, the axial location of magnet partly is to expand in a horizontal direction formation, thus, can be provided with on the big optimum value with propagation size and to interrelate, and can increase magnet shaft to the bed knife of localization part, thereby just can save bonding.

(10) utilize the diapire side in yoke to make the tubular wall of lid radially outward expand moulding, and make the peripheral edge portion of lid form closely connected contacting with the end face of magnet, therefore the magnet shaft that each magnet just is fixed and clamp forms at the peripheral edge portion of lid and in the expansion of the tubular wall of yoke diapire side loam cake can be cancelled sealing ring and roll riveting part and the axial length of magneto is shortened between the localization part. In addition, the peripheral edge portion of the height and position tegmentum of each magnet is pressed into uniformly, and the dimensional discrepancy of the short transverse of each magnet is absorbed in yoke diapire side, therefore this deviation do not appear at open wide distolateral, so the length of magneto can further be shortened.

Claims

1. the rotor of a permanent magnet generator, it comprises:

A plurality of magnet are disposed on the inner periphery of the yoke of peviform basically at certain intervals;

A tubular cover is connected the inboard of magnet;

Utilization expands to first expansion that forms in the space between the adjacent magnets radially outwardly with the tubular wall of lid;

The footpath protruding peripheral edge portion that is provided with covering of yoke open side that makes progress closely contacts with magnet end face on the yoke open side;

The inner margin portion that is provided with that covers in yoke diapire side is upwards inwardly stretched out in the footpath, is fixed on the yoke diapire; And

The tubular wall that utilization makes lid one or more second expansions that expansion outwards constitutes on the end face part of the diapire side magnet of yoke at least;

It is characterized in that:

Described first expansion the whole length of magnet axially on form; And

Described one or more second expansion is provided on yoke diapire and the yoke diapire side in the space between the magnet end face.

2. the rotor of permanent magnet generator according to claim 1 is characterized in that, has arranged a plurality of open-works in the closure wall of described yoke on the circumferencial direction at regular intervals.

3. the rotor of permanent magnet generator according to claim 2 is characterized in that, magnetic resistance spare structure projectedly in described open-work, is arranged in the open-work of the open-work of described magnetic resistance spare the same side greater than other on the tubular wall of described yoke.

4. the rotor of permanent magnet generator according to claim 3, it is characterized in that, described open-work be a plurality of be arranged in the yoke diapire circumferencial direction with the concentric circle of yoke axis hole on elliptical aperture, in described open-work, the elliptical aperture that is arranged in described magnetic resistance spare the same side is greater than other open-work.

5. the manufacture method of the rotor of a permanent magnet generator, wherein a plurality of magnet are disposed on the inner periphery of the yoke of peviform basically at certain intervals, and tubular cover is connected the inboard of magnet, it is characterized in that this method comprises the following steps:

The outside of anchor clamps from the yoke diapire is inserted into the open-work of doing in advance on the yoke diapire;

A plurality of magnet are remained on the described anchor clamps in the yoke;

By fastening means lid is inserted into the inboard of magnet, the inner margin portion of lid is pressed on the yoke diapire, make the tubular wall outwards expansion radially of lid thus, to form first expansion in the interval between the adjacent magnets; Described inner margin portion is provided at and covers yoke diapire side, and radially inwardly stretches out; Described tubular wall is formed on and covers yoke diapire side;

The inner margin portion of lid is fixed on the diapire of yoke; And

By inserting the inboard plasticizing instrument of lid, the tubular wall that makes lid is outwards expansion on the end face part of the diapire side magnet of yoke at least, constitute one or more second expansions in the space on yoke diapire and yoke diapire side between the magnet end face, the peripheral edge portion of lid is closely contacted on the end face of magnet; Described peripheral edge portion is formed on and covers the yoke open side, radially outward stretches out.

6. the manufacture method of the rotor of permanent magnet generator according to claim 5 is characterized in that, described one or more second expansions are to form by means of the elastomer portion that a plasticity instrument smaller diameter portion end face is provided with.

7. the manufacture method of the rotor of a permanent magnet generator, wherein a plurality of magnet are disposed on the inner periphery of the yoke of peviform basically at certain intervals, and lid with tubular wall is connected the inboard of magnet, it is characterized in that this method comprises the following steps:

Temporarily be positioned at a plurality of magnet in the yoke:

Lid is pressed into the inboard of magnet, and described tubular wall is radially outward expanded, thereby the space between adjacent magnets has formed first expansion;

Be fixed on the yoke diapire radially inwardly stretching out the inner margin portion that on the tubular wall of the lid on the yoke diapire side, is provided with; And

Bottom surface side at yoke diapire side place magnet forms one or more second expansions, in the step that forms described second expansion, expander tool is placed on the opposite of tubular wall of lid and the corresponding section, space between yoke diapire and the yoke diapire side magnet bottom surface, when a stroke is added to one axially, utilize a stroke changeable device described expander tool to be moved radially outwardly the stroke that the described stroke on axial mechanically changes over radially, the tubular wall part of the lid that expander tool faces toward on yoke diapire side is outwards expanded diametrically.

8. the manufacture method of the rotor of permanent magnet generator according to claim 7 is characterized in that,

Described stroke changeable device comprises that one is driven the chamfered portion of side and the chamfered portion of a primary side; And

The propagation size of one or more axial location parts of described magnet is to be determined by the angle of inclination of these two chamfered portions and the axial stroke of primary side chamfered portion.