CN1051412C

CN1051412C - A rotor of a magneto generator

Info

Publication number: CN1051412C
Application number: CN94109519A
Authority: CN
Inventors: 野末裕; 大杉雅史
Original assignee: Meizi Co ltd
Current assignee: Meizi Co ltd; Mitsuba Corp
Priority date: 1993-08-03
Filing date: 1994-08-03
Publication date: 2000-04-12
Anticipated expiration: 2014-08-03
Also published as: KR950007243A; TW262607B; FR2708802B1; ITTO940637A1; KR100267726B1; JPH0746781A; IT1266903B1; FR2708802A1; ITTO940637A0; CN1111846A

Abstract

The cylindrical wall 41 of a cover 40 bulges between two adjacent magnets 20,20, thus forming a circumferential positioning portion 47. The upper end of the cylindrical wall 41 of the cover 40 is equipped with an outer rim 42 extending outwards in the diametral direction according to a toroidal ring shape. The portion for connecting the external rim 42 to the cylindrical wall 41 is equipped with a portion conferring elasticity 43 by a bending action, this portion 43 being able to be excited in response to the deflection of the magnets. The lower end of the cylindral wall 41 of the cover 40 is equipped with a unitary inner rim 44 having a toroidal ring shape. The inner circumference of the inner rim 44 is equipped with a stiffening portion 46 over its entirety by a bending action.

Description

A kind of rotor of permanent magnet generator

The present invention relates to a kind of rotor of permanent magnet generator, particularly the improvement of the fixed structure of permanent magnet.This permanent magnet for instance, is used for the rotor of permanent magnet generator effectively, permanent magnet generator then be contained on the car and special vehicle on, as motorcycle, automatic vehicle or the like.

The general dress of permanent magnet generator use the permanent magnet (hereinafter being called magnet) that is coated with oxygen magnet such as iron, this permanent magnet generator to be used on the car and special vehicle on, as motorcycle, automatic vehicle or the like.

This permanent magnet generator comprises:

A rotor, it is made like this: promptly some magnet can equidistantly distribute and be fixed on the inner face of yoke;

A generator, it is made like this: promptly coil can radially twine and be contained among the several regions unshakable in one's determination;

Rotor is rotated around generator by a motor driven, thereby induces electric power.

A kind of rotor past that is used for permanent magnet generator once described at disclosed application No.61-280747.Rotor is made up of a yoke, several magnet and an enclosure.The cylinder of the enclosure contacts with the inner surface of several circular arc magnet.The bead of the enclosure contacts with the end face of each magnet open side, has so just stoped moving axially of each magnet.The standing part system of magnet protective material is fixed on the bottom of yoke, and the bowl-type of enclosure cylinder bottom one side is made taper, so that its inside dimension than magnet is little.Form a dilation on enclosure cylinder, outwards charge among each position between the adjacent magnets, magnet is fixed on the inner surface of yoke like this.Moreover; the making of rotor is as described later: when the enclosure is pressed into; the distortion of the enclosure is absorbed in the dilation; and the outside shape of standing part one side of magnet protective material cylinder is made taper; so that it is less than the inside dimension of magnet; like this, the distortion of standing part one side of the enclosure can reduce, and owing to the effect of standing part can be fixed on the enclosure on the yoke.

Yet the above-mentioned past, employed technology had following problem.In the magnet of permanent magnet generator, the outside shape towards yoke bottom one side of enclosure cylinder is made taper, makes its inside dimension less than the annular magnet group, so that axially can not form dilation along magnet.Therefore, magnet axially can not be fixed at it, and the inner space of yoke side narrows down.

A kind of rotor that the purpose of this invention is to provide permanent magnet generator can be securely fixed in magnet the bottom that also enclosure can be fixed on yoke on the yoke.

For reaching these purposes, the invention provides a kind of rotor of permanent magnet generator, wherein several magnet arrangements are at the inner surface of yoke and have neutral gear, yoke at circumferencial direction near bowl-type; A kind of enclosure also is provided, shape such as cylinder, it is press-fitted in the inner face of each magnet into and is fixed therein.

The rotor of permanent magnet generator comprises:

-dilation, it is outwards expanded on its diametric(al) by the cylindrical wall with the enclosure and forms, and dilation is arranged between the adjacent magnet along the total length of magnet;

-outward flange, outwards outstanding in the diametric(al) of the enclosure on the enclosure of yoke open section one side, open wide a side with the yoke of the enclosure and flush;

-inward flange, outstanding inwards built in yoke closing section one example of the enclosure along the diametric(al) of the enclosure, be fixed on the bulkhead of yoke, there is the part of the enhancing rigidity of a ring-type at this edge.

According to the present invention, when going in the enclosure is press fitted into the inside of group of magnets, stress is on inward flange, and this stress will make inward flange be deformed into corrugated.Form one and strengthen the part of rigidity on the inner circumferential portion of the inward flange of the enclosure, so that can stop inward flange to be deformed into corrugated, this is because that part that strengthens rigidity stops inward flange to be deformed into corrugated.Therefore, the inward flange of the enclosure suitably can be fixed on the bulkhead of yoke.

Moreover, be that total length is formed in the neutral gear between adjacent magnets, so magnet can locate and fix reliably vertically by outwards the expand dilation that forms of cylinder sidewall.

In the accompanying drawing:

Fig. 1 (a)-Fig. 1 (b) is depicted as a kind of rotor of permanent-magnetic power generator of first embodiment; Fig. 1 (a) is part cross sectional plane figure, and Fig. 1 (b) faces sectional drawing along what Fig. 1 (a) b-b line cut;

Fig. 2 is the exploded view of this rotor of permanent-magnetic power generator;

Fig. 3 (a)-Fig. 3 (b) is depicted as a kind of rotor of permanent-magnetic power generator of second embodiment; Fig. 3 (a) is part cross sectional plane figure, and Fig. 3 (b) faces sectional drawing along what Fig. 3 (a) b-b line cut;

Fig. 4 (a)-Fig. 4 (b) is depicted as a kind of rotor of permanent-magnetic power generator of the 3rd embodiment; Fig. 4 (a) is part cross sectional plane figure, and Fig. 4 (b) faces sectional drawing along what Fig. 4 (a) b-b line cut;

Fig. 5 (a)-Fig. 5 (b) is depicted as a kind of rotor of permanent-magnetic power generator of the 4th embodiment; Fig. 5 (a) is part cross sectional plane figure, and Fig. 5 (b) faces sectional drawing along what Fig. 5 (a) b-b line cut.

First embodiment

In the first embodiment of the present invention, the rotor of permanent magnet generator comprises yoke 11, some magnet 20, shell 30 and the enclosure 40.

Yoke 11 is made by magnetic material, and it integrally makes roughly bowl-shape, and its top is opened wide, and the bottom is sealed.Yoke 11 has cylindrical wall 12.Magnetic resistance body 13 is on the surface of cylindrical wall 12, and is radially outwards outstanding, and it is at circumferencial direction and axially arrange with predetermined spacing.Center at the bulkhead of yoke 11 lower planes has axis hole 15.There is a propeller boss (not shown) that is used for being connected to pass axis hole 15 with the engine (not shown).With the concentric circumference of axis hole 15 on, the some parts of bulkhead 14 is rushed out from lower plane, so that the part 16 of some (being 4 in first embodiment) fixed housing to upper process, is used for preventing the rotation of shell 30 (will address hereinafter) built in the periphery of axis hole 15.

Bulkhead 14 bottoms of yoke 11 are shaped on the part 17 that some (being 8 in first embodiment) fixed cover is applied mechanically, and are used in the inboard the fixedly enclosure 40, the inside of the part of using at fixed housing 16.The part 17 that fixed cover is applied mechanically, be with the concentric circumference of axis hole 15 on, along the circumferential direction equidistantly separate.The part of going out from its lateral on the bulkhead 14, the fixing part 17 of the enclosure just make and bulkhead 14 projection vertically upward, so that it is towards the inside of the enclosure 40.Fixedly the part 17 of the enclosure is to arrange like this: promptly they are passed in the fixing hole of making on the enclosure, and are in addition caulking as described later then.

In first embodiment, be not caulking preparation length on the unlimited limit of yoke 11 cylindrical walls 12.

The aspect ratio yoke 11 of magnet 20 is low, and integrally makes circular arc, along the inner circumferential surface bending of yoke.On inner surface 21 two ends of magnet 20 circular arcs, shift a burden from one shoulder to the other 23,23, from by the surface 21 oblique outer surfaces 22.The magnet both ends of the surface are made vertical with the normal of yoke 11.The last plane of magnet and lower plane are made and are parallel to each other.

Shell 30 is made by isoelastic nonmagnetic substance integral body in having, and is contained in the yoke 11.Shell 30 has a ring 31, and its internal diameter approximates the internal diameter of yoke 11, and the width of ring is slightly less than magnet 20 at its diametric thickness.Be shaped on parting bead 32 on ring 31 the one side (hereinafter being called " top "), the number of its number and magnet 20 (being 4 in first embodiment) equates, so that magnet is evenly distributed and is parallel to each other at circumferencial direction.

The aspect ratio magnet 20 of each parting bead 32 is low, and parting bead is slightly less than magnet 20 diametric thickness at diametric thickness.Between per two adjacent parting beads 32,32, have magnet cover 33.Each magnet cover 33 is all made circular arc.The height of magnet cover 33 is lower than magnet 20, and its length is then slightly long than magnet 20 length in a circumferential direction, and its thickness is more smaller than the thickness of magnet 20 on diametric(al).Top, the front and the back side of magnet cover 33 are opened wide.

The lower plane of the ring 31 of shell 30 just is shaped on the relative side of the side of parting bead 32, is shaped on some (being 4 parting beads in first embodiment) fixedly recess 34 of usefulness, is used to prevent that shell 30 from rotating.The position of recess 34 is corresponding with each parting bead 32, and the degree of depth and width are constant.Each fixedly the recess 34 of usefulness make and on yoke 11 and the fixing of projection match with part 16.

The enclosure 40 is to make with metal material, uses such as thin-walled part to be stamped to form or the like, and it is made near cylindrical shape, so that insert by 9 will be described hereinafter in 20 groups of cylinders that constitute of magnet).The enclosure 40 has cylindrical wall 41, and its external diameter is more bigger than the barrel bore of magnet 20.

One end of the enclosure 40 cylindrical walls 41 (hereinafter referred to as " going up the plane ") has outward flange 42, and is outwards outstanding in the diametric(al) of cylindrical wall 41, so that has the shape of ring-type doughnut.The coupling part of outward flange 42 and cylindrical wall 41 has the flexible part 43 of holistic enhancing, is processed by folding.This that is to say, strengthens elastic part 43 and make the doughnut shape of ring-type on plane graph, and be approximate semicircle on sectional drawing, and the open section of semicircle face down.When the excircle of outward flange 42 partly withstands on the last plane of magnet 20, strengthen elastic part and have energy owing to the distortion of magnet 20.

The lower end of the cylindrical wall 41 of the enclosure 40 has whole inward flange 44, and before the yoke assembling, inward flange has the doughnut shape of ring-type, the diameter of the part 17 that its internal diameter is applied mechanically less than fixed cover, and be slightly larger than the diameter of axis hole 15.Have fixingly with hole 45 by the middle part of diameter at inward flange 44, fixedly the hole count of usefulness equals the number (being " 8 holes ") of the part 17 that fixed cover applies mechanically in first embodiment, so as with its aligning.Each is fixing all must to make fixedly the part of the enclosure insert wherein with hole 45.

The inner periphery of inward flange 44 has the part 46 that strengthens rigidity, is formed by bending machining at whole inner periphery.The part 46 that strengthens rigidity is to be folded by methods such as drawing processing to form, and its height is constant along whole inner periphery, so that (hereinafter will illustrate) it is that enough rigidity is arranged when the enclosure 40 is press-fit into place.

The installation step of rotor of permanent-magnetic power generator will be described below.

At first, shell 30 is inserted in the yokes 11 so that each fixedly the concave portions 34 of usefulness can be contained in each shell on yoke 11 diapires fixedly on the part 16 of usefulness.Because shell is fixing with part 16 and the fixedly cooperation between the recess 34 of usefulness, shell 30 is contained in the yoke 11 and can not rotates.

Secondly, each magnet 20 is inserted each magnet cover 33 of shell 30 from the top.When each magnet 20 inserts in each magnet cover 33, behind the side almost parallel of the end face 24 of each magnet 20 and parting bead 32, magnet 20 is just accurately located at circumferencial direction.In this case, magnet 20 and parting bead 32 location and in the mutual push-tight of inner peripheral surface of circumference upper edge yoke 11 mutually.

Secondly, make the inside that the circular enclosure is press fitted into group of magnets 20, magnet 20 is to cover in the cover 33 of shell 30, the result, and the cylindrical wall 41 of the enclosure 40 expands between

adjacent magnets

20,20, thereby forms a circle fixed bit part 47.

When cylindrical wall 41 expands, the influence of the secondary stress that the inward flange 44 of the enclosure 40 is subjected to being produced by expansion, thus inward flange 44 is tending towards being deformed into corrugated.

Yet, in first embodiment, if secondary stress influences the inward flange 44 of the enclosure 40, strengthen the part 46 of rigidity, as folding result, form the inner circumferential portion of inward flange 44, so that can stop inward flange 44 distortion to become corrugated the resistance of the stress that produces in inward flange 44.Therefore, as mentioned below, when the inward flange of the enclosure 40 was fixed on the bulkhead 14 of yoke 11, fixedly the part 17 of the enclosure was inserted in the fixing hole 45 and is in addition caulking, so that inward flange 44 is fixed and can be subjected to the harmful effect of inward flange 44 distortion.

According to first embodiment, when being press fitted into the enclosure 40 in the group of magnets 20, can putting an anchor clamps (not shown) and contact with outward flange 42 and inward flange 44, these anchor clamps apply power, can evenly distribute along the whole of the enclosure 40 so that be press-fitted the power of usefulness.Because the power homogenizing, can prevent when being pressed into the enclosure 40 in the group of magnets 20 striped of generation level on cylindrical wall 41, prevent the irregular deformation of cylindrical wall 41 outward flanges 42 and inward flange 44, and reach accurately and be press-fitted.

Even when the enclosure 40 is when making with thin-walled part, owing to form outward flange 42 in the upper end of the enclosure 40, form inward flange 44 in the lower end of the enclosure 40, cylindrical wall 41 has enough rigidity.Therefore, it is axially at adjacent magnets 20 in cylindrical wall 41 upper edges, form circle fixed bit part 47 between 20, so that the enclosure 40 can be press fitted among the group of magnets 20 glidingly, and the outer circumference surface of cylindrical wall 41 can contact with the inner peripheral surface of group of magnets 20 equably closely.

When the enclosure 40 pressed fit in the group of magnets 20 fully, inward flange 44 contacted with the bottom of bulkhead 14, in this case, each in inward flange 44 fixing with hole 45 and on yoke 11 bulkheads 14 bottoms and the fixing of projection match with part 17.

After being press-fitted the anchor clamps (not shown) and removing in the enclosure 40, perhaps after caulking pin (not shown) is inserted in the reach through hole (each reach through hole is opened in the fixing part with hole 45 corresponding to the enclosure 40) that is press-fitted anchor clamps, each enclosure of yoke 11 is fixing to pass the fixing usefulness hole 45 of the enclosure 40 with part 17 from yoke 11, and in addition caulking.Because it is the fixing effect with part 17 of the enclosure, the enclosure 40 be along on the bulkhead 14 that is fixed on yoke 11 wholecircle week of inward flange 44, fixing in addition caulking with part 17 to the enclosure.

Under the enclosure 40 was fixed on state in the yoke 11, the outward flange 42 that the top of each magnet 20 is had by the enclosure 40 upper ends this moment pushed, so that group of magnets 20 may be urged downwardly.Outward flange 42 will push group of magnets 20 downwards, and the result produces a kind of reaction, is promptly reacted on the outward flange 42 by group of magnets 20, and there, the enhancing elastic part 43 that is formed on the outward flange 42 is upwards made strain, and has the power of energization.Outward flange 42 energization power whereby pushes group of magnets 20 downwards.

Because the result of outward flange 42 pushing force effects, group of magnets 20 is pushed downwards by the outward flange 42 of the enclosure 40, can prevent reliably that each magnet 20 from ejecting from yoke 11, and, thereby yoke 11, shell 30 and the enclosure 40 are located reliably at the axis direction of yoke 11.

First embodiment has following advantage.(1) when being press fitted into the enclosure 40 in the group of magnets 20, even distortional stress acts on the inward flange 44, strengthen rigidity section 46 owing on the inner circumferential portion of the inward flange 44 of the enclosure 40, be formed with, inward flange 44 is enough to prevent to form corrugated by the resistance that strengthens rigidity section 46 antagonism distortional stresses.Therefore, the inward flange 44 of the enclosure 40 suitably is fixed on the bulkhead 14 of yoke 11.(2) owing to form round fixed bit part 47 (this is to form in the diametric(al) back of outwards expanding from cylindrical wall 41) along the total length of neutral gear between the

adjacent magnets

20,20, every magnet 20 is located reliably and is fixed in the circumferencial direction of the enclosure 40 and diametric(al).Equally, because outward flange 42 is pushed the last plane of each magnet 20 to, each magnet is reliably located and is fixed at the axial quilt of the enclosure 40.Therefore, can fix by different adhesives.

Second embodiment

Fig. 3 (a)-Fig. 3 (b) shows the rotor of permanent-magnetic power generator by second embodiment.Fig. 3 (a) is part cross sectional plane figure, and Fig. 3 (b) faces sectional drawing along what Fig. 3 (a) b-b line cut.

The structural difference of second embodiment and first embodiment is to have cancelled shell, and enhancing elastic part without the outward flange 42A of enclosure 40A, and be shaped on an axial location part 48, this axial location part 48 is on the bottom of the cylindrical wall 41 of enclosure 40A, diametric(al) at enclosure 41A is outwards outstanding, makes ring-type.

Second embodiment also has following advantage except the advantage of first embodiment:

(1) under the state of plane contact on the outward flange 42A of enclosure 40A and each magnet 20, the closed side of the cylindrical wall 41 of enclosure 40A is to the outer surface expansion of its diameter, can fix each magnet 20 like this, because each magnet is sandwiched in the outward flange 42A of enclosure 40A and between the axial location part 48 on the closed-wall of cylindrical wall 41.

(2) height and position of each magnet 20 is set at the outward flange 42A place of enclosure 40A, and this is a result of above-mentioned advantage.Difference in magnet 20 height and positions is absorbed in the bulkhead side of yoke 11.Therefore can shorten the length of rotor of permanent-magnetic power generator.

(3) be cancelled by above-mentioned advantage (1) shell, the quantity of part and assembly manipulation is reduced.Because the operation that magnet 20 is pressed fit in the shell is cancelled, the damage of each magnet 20 is prevented, and can be loosened the control of magnet 20 sizes.

(4) when the bottom of the cylindrical wall 41 of enclosure 40A during in the outside outer expansion of its diametric(al), by means of enclosure 40A is pushed away and supply with swell increment downwards, on the inward flange 44 of the enclosure 40A that has avoided excessive tensile stress to act on being fixed on the yoke 11, therefore can prevent the damage of the inward flange 44 of enclosure 40A.

The 3rd embodiment

Fig. 4 (a)-4 (b) shows the rotor of permanent-magnetic power generator by the 3rd embodiment.Fig. 4 (a) is part cross sectional plane figure; Fig. 4 (b) faces sectional drawing along what Fig. 4 (a) b-b line cut.

The structural difference of the 3rd embodiment and first embodiment is to be shaped on magnet supporting part 18 on the sidewall 12B of yoke 11B, rather than is supported by shell.Magnet supporting part 18 is outstanding inwards in diametric(al) with the method processing of drawing, and forms ring-type.Pushed away thereby the lower plane of each magnet 20 squeezes, so that each magnet 20 is positioned.

The 3rd embodiment also has following advantage except the advantage of first embodiment, promptly shell can be cancelled.

The 4th embodiment

Fig. 5 (a)-Fig. 5 (b) shows the rotor of permanent-magnetic power generator by the 4th embodiment.Fig. 5 (a) is part cross sectional plane figure, and Fig. 5 (b) faces sectional drawing along what Fig. 5 (a) b-b one line cut.

The structural difference of the 4th implementation column and first embodiment is to have one to strengthen rigidity section 46c, this strengthens rigidity section 46c built in the excircle of inner edge 44c and the fixing mid portion of using between the hole 45 on the inward flange, this strengthens rigidity section and make approximate half-circular on vertical cross section figure, and on plane graph ringwise.

Except the advantage of first embodiment, the 4th embodiment has following advantage, is that the rigidity that strengthens rigidity section 46c is increased near semicircle on vertical cross section figure owing to strengthen rigidity section 46c.

Illustrated as mentioned, according to the present invention, can securely magnet fixed and the enclosure thoroughly is being fixed on the bottom of yoke on its total length.

Claims

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

Some magnet on the inner surface of circumferential directions in yoke, have neutral gear each other, and the shape of yoke is near bowl-shape;

The columnar enclosure presses fit into the inboard of each above-mentioned magnet and is fixed on the bottom of yoke;

Dilation, it is outwards to be expanded and form in its diametric(al) by the cylindrical wall of the above-mentioned enclosure;

Outward flange, on the above-mentioned enclosure in the opened portion office of above-mentioned yoke, outwards outstanding in the diametric(al) of the enclosure, it reaches the above-mentioned open section side of above-mentioned yoke, contacts with above-mentioned magnet;

Inward flange, outstanding inwards in its diametric(al) on the above-mentioned enclosure of the closure office of above-mentioned yoke, and be fixed on the bulkhead of above-mentioned yoke;

It is characterized in that,

Total length along magnet between adjacent above-mentioned magnet all provides described dilation;

Be shaped on the part of the enhancing rigidity of an annular on the described inward flange.

2. by a kind of rotor of the permanent magnet generator of claim 1, it is characterized in that be shaped on the axial location part on the bottom of the above-mentioned cylindrical wall of the above-mentioned enclosure, it is outwards outstanding in the diametric(al) of the enclosure.

3. press a kind of rotor of the permanent magnet generator of claim 2, it is characterized in that, above-mentioned axial location partly is to make by the processing integral body that expands.

4. press a kind of rotor of the permanent magnet generator of claim 2, it is characterized in that above-mentioned axial location partly forms annular shape.

5. according to a kind of rotor of the permanent magnet generator of claim 1, it is characterized in that, on the bottom of the above-mentioned sidewall of above-mentioned yoke, be shaped on the magnet supporting part inwards in the diametric(al) of the enclosure, so that the lower plane of above-mentioned magnet is by this pushing of support branch and location.

6. according to a kind of rotor of the permanent magnet generator of claim 5, it is characterized in that the magnet supporting part is to make by drawing integral body.

7. according to a kind of rotor of the permanent magnet generator of claim 5, it is characterized in that the magnet supporting part is annular.

8. press a kind of rotor of the permanent magnet generator of claim 1, it is characterized in that above-mentioned inward flange has the fixedly hole of usefulness; Above-mentioned enhancing rigidity section is used between the hole built in the excircle part and the said fixing of above-mentioned inward flange.

9. press a kind of rotor of the permanent magnet generator of claim 8, it is characterized in that, above-mentioned enhancing rigidity section is on a centre position between the excircle part of above-mentioned inward flange and the said fixing usefulness hole.

10. press a kind of rotor of the permanent magnet generator of claim 8, it is characterized in that, above-mentioned enhancing rigidity section is near semicircle on vertical cross section figure.

11. press a kind of rotor of the permanent magnet generator of claim 8, it is characterized in that above-mentioned enhancing rigidity section is annular on plane graph.

12. press a kind of rotor of the permanent magnet generator of claim 1, it is characterized in that, be shaped on one on the above-mentioned outward flange and strengthen flexible part.

13. a kind of rotor by the permanent magnet generator of claim 12 is characterized in that, above-mentioned to increase flexible part system whole on above-mentioned outward flange.

14. press a kind of rotor of the permanent magnet generator of claim 12, it is characterized in that the flexible part of above-mentioned enhancing system makes by folding.