CN101505080A - Armature core, motor using it, and its manufacturing method - Google Patents

Abstract

The present invention provides an armature core and a method for manufacturing the armature core. The aim of the invention is to easily manufacture the motor, especially stator core or field excitation component without damaging the characteristic of motor. The armature core comprises the following components: a back yoke which has a main surface approximately vertical to the shaft and has an approximate disc shape; and teeth which are circumferentially placed on the shaft with a mode of projecting from one main surface of the back yoke, wherein, the back yoke is formed by pressed magnetic powder with a mode that the thin plate is formed along the axially laminated steel plate and teeth fixing dents are provided and the teeth are integrated with the teeth fixing dents of the back yoke.

Description

The manufacture method of armature core and armature core

The present invention is that application number is the dividing an application for the Chinese invention patent application of " armature core, the motor that uses this armature core and manufacture method thereof " that 200780010054.4 (PCT/JP2007/056039), the applying date be on 03 23rd, 2007, denomination of invention.

Technical field

The present invention relates to the manufacture method and the compressor of motor and motor, further, is the technology about armature core and manufacturing armature core.

Background technology

In the past, have the axial gap type motor as motor, the opposed face of the rotor of this axial gap type motor and stator is and rotating shaft plane orthogonal roughly.In this axial gap type motor, use along the rotating shaft direction stacked with rotating shaft roughly the thin plate of quadrature (electromagnetic steel plate etc.) form iron core the time, particularly since near tooth and this iron core stacked direction and magnetic flux flow to parallel, so there is the problem of understanding a large amount of eddy current of generation.

Given this, TOHKEMY 2000-253635 communique (patent documentation 1) uses the stator core that forms along circumferential stacked H font electromagnetic steel plate.

In addition, in TOHKEMY 2004-56860 communique (patent documentation 2), form iron core by making up along the stacked electromagnetic steel plate of different directions.

Further, in TOHKEMY 2005-80432 communique (patent documentation 3), disclosed a kind of in the gap motor of footpath the technology with the combination of compressed-core and stacked steel plate.

Yet, in patent documentation 1, because it is stacked to strike out identical shaped electromagnetic steel plate, so the problem that exists so-called profile of tooth to be restricted.

Particularly, in order to realize the high efficiency of motor, tooth and coil need be disposed to high-density.Yet, when the freedom shape of tooth is restricted as described above, be difficult to design this highdensity configuration.

In addition, in patent documentation 2, form iron core owing to will make up, so can access freedom shape to a certain degree along the stacked electromagnetic steel plate of different directions.But, under the situation that will realize complicated shape, just need multiple diel, there is the complicated problem of manufacturing process thus.

In addition, in patent documentation 3, though disclose in the gap motor of footpath, with the technology of compressed-core and stacked steel plate combination, still, because the axial gap type motor is different from the motor that magnetic flux flows is two dimension substantially, so this motor is not suitable for the technology of axial gap type motor.

Suppose to utilize compressed-core to form whole stator core, then can improve freedom shape.But in this case, the weak strength of compressed-core is difficult to adopt by shrink fit or is pressed into etc. stator core is remained on structure in the housing.

Summary of the invention

The 1st purpose of the present invention is, harmless motor characteristic and make motor simply.

And then the 2nd purpose is to keep stator core by be pressed into or shrink fit etc.

And then the 3rd purpose is that at the junction surface that tooth engages with back of the body yoke, the processing radius of tooth can not produce with the bight in the hole of carrying on the back yoke interferes.

The 4th purpose is that harmless motor characteristic can be guaranteed the intensity of armature core, and can prevent the breakage of tooth, and can eliminate tooth maintenance securely with the gap of back of the body yoke.

In order to realize above-mentioned the 1st purpose, the motor of the 1st scheme comprises: with predetermined rotating shaft is the rotor that the center is rotated; And stator, it has and the described rotor devices spaced apart opposed stator core in ground and be installed in coil on this stator core, and described stator core has: with the described rotating shaft back of the body yoke of the roughly disc-shape of quadrature roughly; And a plurality of teeth, they circumferentially are configured on the axial end face of described rotation of described back of the body yoke to hold up the mode edge of coming from described back of the body yoke towards described rotating shaft direction, and utilize the fixed compressed-core formation that forms of magnetic powder, described tooth is imbedded in the described back of the body yoke with desired depth on described rotating shaft direction, perhaps, described tooth is imbedded wherein in the mode that runs through in the described back of the body yoke on described rotating shaft direction, described back of the body yoke, have and make and described rotating shaft thin plate stacked stacked steel plate on described rotating shaft direction of quadrature roughly, the described back of the body yoke of described stator has: be used to bury underground the set a plurality of recesses of described a plurality of tooth; And the stress that is arranged at least one side of all sides in described a plurality of recess or outer circumferential side relaxes the hole.

Thus, particularly near change in magnetic flux density space (air gap) greatly, promptly in the many teeth of the higher harmonic wave component of magnetic flux, used the little compressed-core that the magnetic powder is fixed of eddy current loss.In addition, carry on the back in the yoke by described tooth is imbedded with desired depth vertically, thereby on back of the body yoke, magnetic flux is roughly passing through on the plane orthogonal with rotating shaft.Perhaps, by with described tooth imbedding wherein in the mode that axially runs through described back of the body yoke, roughly passing through on the plane orthogonal with rotating shaft with this magnetic flux on back of the body yoke.In addition, owing to tooth is formed by compressed-core, so make easily.Like this, can can't harm motor characteristic and easily make motor.In addition, because described a plurality of teeth are formed separately by compressed-core,, can prevent equipment enlarging so can reduce forming pressure.In addition, because the position of tooth is definite by back of the body yoke, the precision in space might as well.Further, in the past, be difficult to realize at loading axis gap motor aspect the bigger purposes of outputs such as compressor, but, just can adopting this axial gap type motor aspect the described purposes by adopting motor of the present invention.

Thus, according to this motor, particularly near change in magnetic flux density space (air gap) greatly, promptly in the many teeth of the higher harmonic wave component of magnetic flux, used eddy current loss little with the fixed compressed-core that forms of magnetic powder, in the long-time back of the body yoke that continues the higher state of magnetic flux density, used all high stacked steel plate of permeability and saturation flux density.In addition, carry on the back in the yoke by described tooth is imbedded with desired depth vertically, thereby on the back of the body yoke that thin plate is stacked vertically, magnetic flux is roughly passing through on the plane orthogonal with rotating shaft.Perhaps, by with described tooth imbedding wherein in the mode that axially runs through described back of the body yoke, therefore in the back of the body yoke that thin plate is stacked vertically, magnetic flux is roughly passing through on the plane orthogonal with rotating shaft.Like this, harmless motor characteristic, and can keep stator core by be pressed into or shrink fit etc.In addition, because described a plurality of teeth are formed separately by compressed-core,, can prevent equipment enlarging so can reduce forming pressure.In addition, because the position of tooth is definite by back of the body yoke, the precision in space might as well.Further, in the past, be difficult to realize at loading axis gap motor aspect the bigger purposes of outputs such as compressor, but, aspect such use, just can adopt this axial gap type motor by adopting motor of the present invention.Like this, in tooth, used the little compressed-core that the magnetic powder is fixed of eddy current loss, and remain in the housing by the back of the body yoke that is pressed into or shrink fit will be provided with the stacked steel plate with sufficient intensity, so, realized can't harm motor characteristic and by being pressed into or shrink fit etc. keeps the motor of stator core.

Thus, relax the hole by means of the stress at least one side who is arranged on the interior all sides that are used to bury underground the set a plurality of recesses of described a plurality of tooth or outer circumferential side, can relax owing to be pressed into etc. radially acts on the stress on the back of the body yoke when remaining on tooth on the back of the body yoke, further, the stress of outer circumferential side relaxes the hole, can relax owing to be pressed into or radially act on during maintenances such as shrink fit back of the body yoke stress on the back of the body yoke, can keep the precision of air gap, and can't harm motor characteristic.In addition, the stress of interior all sides relaxes the hole, for example under the situation that also will carry on the back the housing that is used as the maintenance bearing in the yoke week, also can keep the quadrature precision with axle.

According to the motor of the 1st scheme, the 2nd scheme is, described a plurality of teeth separately imbed part in the described back of the body yoke, than other parts of fine of not imbedding in the described back of the body yoke.

Thus, the precision of air gap has been improved in the location in the time of can realizing inserting easily.

According to the motor of the 1st scheme, the 3rd scheme is, described a plurality of teeth separately imbed part in the described back of the body yoke, compare with other parts in not imbedding described back of the body yoke, be tapered towards end.

Thus, the magnetic flux of carrying on the back the part in the yoke by imbedding of tooth comes out from back of the body yoke at once, so the closer to end, magnetic flux is few more.In addition, can do one's utmost to reduce the amount of magnetic flux by the tooth inside that forms by compressed-core, can make the interior magnetic flux of back of the body yoke as much as possible by with the face of axial quadrature.Further, when inserting tooth in the back of the body yoke, because stress is to act on equably, so be difficult to take place damaged.In addition, can be with the taper of described a plurality of teeth pull out wedge during partly as the shaping compressed-core.In addition, the form of the taper of described a plurality of teeth part may not be continuous, can also be to narrow down step-likely.

According to the motor of the 1st scheme, the 4th scheme is, described a plurality of teeth separately the end side of imbedding the part in the described back of the body yoke and described back of the body yoke between gapped.

Adopt this structure and since described a plurality of teeth separately the end side of imbedding the part in the described back of the body yoke and described back of the body yoke between gapped, so can stop magnetic flux in back of the body yoke, to pass through vertically, can suppress the increase of iron loss effectively.In addition, as mentioned below, can be benchmark with the face of the rotor-side of tooth, utilize the gap to absorb the assembling of scale error, can suppress the deviation of performance that assembly error causes etc. thus.

According to the motor of the 1st scheme, the 5th scheme is, described a plurality of teeth of described stator core have, at the wide width part that is provided with the opposed side of described rotor.

Whereby, owing to can increase and the opposed area of rotor, so, interlinkage flux can be increased.

According to the motor of the 1st scheme, the 6th scheme is, opposed each face of described stator and described rotor is and described rotating shaft plane orthogonal roughly.

Therefore, can dwindle axial dimension, realize miniaturization.

According to the motor of the 1st scheme, the 7th scheme is that described stator disposes two in the mode from the described rotor of described rotating shaft direction sandwich.

Thus, can increase interlinkage flux, improve output.In addition, from the attraction force acts of the stator of axial both sides in described rotor, thereby but the thrust of negative function on rotor and axle also can reduce the power of the thrust direction on the bearing that acts on back shaft.

According to the motor of the 1st scheme, the 8th scheme is that described rotor has permanent magnet.

Thus,, can make the magnetic flux that contains a large amount of higher harmonics tooth by stator core by the magnetic flux that permanent magnet produces, but owing to used the little compressed-core of eddy current loss in the tooth, so, iron loss can further be reduced.In addition, compressed-core is compared with electromagnetic steel plate, and permeability and saturation flux density are low, but because the long-time back of the body yoke that continues the higher state of magnetic flux density is an electromagnetic steel plate, so, its influence can be suppressed to Min..

According to the motor of the 1st scheme, the 9th scheme is, the peripheral part of the described back of the body yoke of described stator core be pressed into or shrink fit in the inboard of housing.

Thus, back of the body yoke can be remained on the housing reliably.In addition, utilize back of the body yoke also can improve the intensity of housing, reduce vibration, noise.

In order to realize above-mentioned the 2nd purpose, the manufacture method of the motor of the 10th scheme is that this motor comprises: with predetermined rotating shaft is the rotor that the center is rotated; And stator, it has and opposed stator core in described rotor devices spaced apart ground and the coil that is installed on this stator core, the described stator core of described stator has: back of the body yoke, it has makes and described rotating shaft thin plate stacked stacked steel plate on described rotating shaft direction of quadrature roughly, and have be used to bury the set a plurality of recesses of described a plurality of tooth underground and be arranged on all sides in described a plurality of recess or at least one side of outer circumferential side on stress relax the hole; And a plurality of teeth, they circumferentially are configured on the axial end face of described rotation of described back of the body yoke to hold up the mode edge of coming from described back of the body yoke towards described rotating shaft direction, the utilization compressed-core that the magnetic powder is fixed forms, described tooth is imbedded in the described back of the body yoke with desired depth on described rotating shaft direction, perhaps, described tooth is imbedded wherein in the mode that runs through in the described back of the body yoke on described rotating shaft direction, the manufacture method of this motor comprises the steps: and will be wound into described coil configuration under the state of reservation shape in advance on described back of the body yoke, perhaps, the step that is configured around described tooth; And after having disposed described coil, with the step of described back of the body yoke and described a plurality of indented joints.

Thus, can can't harm motor characteristic and easily produce can be by being pressed into or shrink fit etc. keeps the motor of stator core.In addition,, yoke and a plurality of indented joint will be carried on the back, also stator core can be easily assembled being wound into coil configuration under the state of reservation shape in advance after on the back of the body yoke.Perhaps, with being wound into coil under the state of reservation shape in advance after the tooth configuration, will carry on the back yoke and a plurality of indented joint, thereby can easily assemble stator core.

Manufacture method according to the motor of the 10th scheme, the 11st scheme is, opposed each face of described stator and described rotor, be and described rotating shaft plane orthogonal roughly, in step with described back of the body yoke and described a plurality of indented joints, the plane with the opposed side of described rotor with described tooth is a benchmark, with described back of the body yoke and described a plurality of indented joint together.

Thus, owing to be to be benchmark with described tooth and the plane rotor opposite side, with back of the body yoke and a plurality of indented joint together, so improved the precision of air gap.

In order to realize above-mentioned the 1st purpose, the compressor of the 12nd scheme is mounted with the motor of arbitrary scheme in the 1st～the 8th.

Thus, aspect the purposes of bigger output, can load described motor, thereby realize the compressor of miniaturization, high efficiency (by reducing copper loss) as the axial gap type motor that loads difficulty.

In order to realize above-mentioned the 3rd purpose, motor according to the 1st scheme, the motor of the 13rd scheme is, described a plurality of tooth separately imbed part in the described back of the body yoke, than other parts of fine of not imbedding in the described back of the body yoke, between described tooth and described back of the body yoke, accompany the 1st insulant that makes described back of the body yoke and described coil insulation.

Thus, particularly greatly, promptly in the many teeth of the higher harmonic wave component of magnetic flux, used the little compressed-core that the magnetic powder is fixed of eddy current loss near change in magnetic flux density space (air gap).In addition, in the back of the body yoke of the higher state of long-time lasting magnetic flux density, for example used all high stacked steel plate of permeability and saturation flux density.Like this, by described tooth is imbedded in the back of the body yoke with desired depth vertically, perhaps, by described tooth is imbedded in the described back of the body yoke to connect axial mode, thereby on back of the body yoke, magnetic flux is roughly passing through on the plane orthogonal with rotating shaft mostly.Like this, can't harm motor characteristic.In addition, between described back of the body yoke and coil, be folded with will the back of the body yoke and coil insulation the 1st insulant, on tooth and junction surface that back of the body yoke engages, the processing radius of tooth can with the bight generation interference in back of the body yoke hole.

In addition, because described a plurality of teeth are shaped by compressed-core respectively,, can prevent equipment enlarging so can reduce forming pressure.In addition, because the position of tooth is definite by back of the body yoke, the precision in space might as well.Further, in the past, be difficult to realize at loading axis gap motor aspect the bigger purposes of outputs such as compressor, but, aspect such use, just can adopt this axial gap type motor by adopting motor of the present invention.

According to the motor of the 13rd scheme, the 14th scheme is, described back of the body yoke has to be made and described rotating shaft thin plate stacked stacked steel plate on described rotating shaft direction of quadrature roughly.

Thus, described back of the body yoke has to be made and the described rotating shaft stacked vertically stacked steel plate of thin plate of quadrature roughly, thereby can use permeability and the high material of saturation flux density in the long-time back of the body yoke that continues the higher state of magnetic flux density.By with described tooth vertically with desired depth imbed the back of the body yoke in, perhaps, by with tooth with connect axial mode imbed the back of the body yoke in, thereby on the back of the body yoke that thin plate is stacked vertically, magnetic flux is roughly passing through on the plane orthogonal with rotating shaft.Therefore, not only harmless motor characteristic also can realize high efficiency, and can keep stator core by be pressed into or shrink fit etc. easily.

Motor according to the 13rd or the 14th scheme, the 15th scheme is, described the 1st insulant is the dielectric film that is provided with the hole that is shape as described below, being shaped as of this hole is bigger than described a plurality of teeth cross section of imbedding the part in the described back of the body yoke separately, and littler than the cross section of not imbedding other parts in the described back of the body yoke.

Thus, the 1st insulant is the dielectric film that is provided with the hole of the shape bigger and littler than the cross section of not imbedding other parts in the back of the body yoke than described a plurality of teeth cross section of imbedding the part in the back of the body yoke separately, owing to used described the 1st insulant, back of the body yoke and coil are insulated, so can limit the gap of carrying on the back between yoke and the coil by the thickness of this dielectric film.Like this, further improved the precision of air gap.

Motor according to the 13rd or the 14th scheme, the 16th scheme is between described tooth and described coil, to accompany the 2nd insulant that makes described tooth and coil insulation, described the 2nd insulant 2 is the dielectric films around other parts that are wound in the described back of the body yoke of not imbedding of described a plurality of teeth.

Thus, be the 2nd insulant owing to used other parts dielectric film on every side do not imbedded in the back of the body yoke that is wound on described a plurality of teeth, therefore, can be simply to insulating between tooth and the coil.

Motor according to the 13rd or the 14th scheme, the 17th scheme is, between described tooth and described coil, accompany the 2nd insulant that makes described tooth and described coil insulation, described the 1st insulant is the 1st resin forming article that is provided with the hole that is shape as described below, being shaped as of this hole is bigger than described a plurality of teeth cross section of imbedding the part in the described back of the body yoke separately, and it is littler than the cross section of not imbedding other parts in the described back of the body yoke, described the 2nd insulant, be the 2nd resin forming article around other parts in the described back of the body yoke do not imbedded that covers described a plurality of teeth, described the 1st resin forming article and described the 2nd resin forming article are one.

Thus, can easily assemble simultaneously in minimizing component number purpose.

Motor according to the 13rd or the 14th scheme, the 18th scheme is, described a plurality of teeth of described stator core have, at the wide width part that is provided with the opposed side of described rotor, between described tooth and described coil, accompany the 2nd insulant that makes described tooth and described coil insulation, between described coil and described wide width part, accompany the 3rd insulant that makes described coil and the insulation of described wide width part, described the 2nd insulant is the 2nd resin forming article around other parts in the described back of the body yoke do not imbedded that covers described a plurality of teeth, described the 3rd insulant is the 3rd resin forming article, and described the 2nd resin forming article and described the 3rd resin forming article are one.

Thus, can easily assemble simultaneously in minimizing component number purpose.

According to the motor of arbitrary scheme in the 13rd～the 18th, the 19th scheme is, opposed each face of described stator and described rotor is and described rotating shaft plane orthogonal roughly.

Thus and since be opposed each face of described stator and rotor for the rotating shaft axial gap type motor of plane orthogonal roughly, so can dwindle axial dimension, realize miniaturization.

According to the motor of arbitrary scheme in the 13rd～the 19th, the 20th scheme is that described rotor has permanent magnet.

Thus,, can make the magnetic flux that contains a large amount of higher harmonics tooth by stator core by the magnetic flux that permanent magnet produces, but because tooth has used the little compressed-core of eddy current loss, so, iron loss can further be reduced.In addition, compressed-core is compared with electromagnetic steel plate, and permeability or saturation flux density are low, but because the long-time back of the body yoke that continues the higher state of magnetic flux density for example uses electromagnetic steel plate, so, its influence can be suppressed to Min..

In addition, in order to realize the 3rd purpose, the manufacture method of the motor of the 21st scheme is that this motor comprises: with predetermined rotating shaft is the rotor that the center is rotated; And stator, it has and the described rotor devices spaced apart opposed stator core in ground and be installed in coil on this stator core, and the described stator core of described stator has: with the described rotating shaft back of the body yoke of the roughly disc-shape of quadrature roughly; And a plurality of teeth, they circumferentially are configured on the axial end face of described rotation of described back of the body yoke to hold up the mode edge of coming from described back of the body yoke towards described rotating shaft direction, the utilization compressed-core that the magnetic powder is fixed forms, described tooth is imbedded in the described back of the body yoke with desired depth on described rotating shaft direction, perhaps, described tooth is imbedded wherein in the mode that runs through in the described back of the body yoke on described rotating shaft direction, the manufacture method of this motor comprises the steps: around described tooth, dispose the 1st insulant that makes described back of the body yoke and described coil insulation, and the step that makes the 2nd insulant of described tooth and described coil insulation; Around the reel step of described coil of described the 2nd insulant; And after the described coil of having reeled, with the step of described back of the body yoke and described a plurality of indented joints.

Thus, the processing radius that can can't harm motor characteristic and easily produce tooth on tooth and the junction surface that engages of back of the body yoke can not produce the motor of interference with the bight in back of the body yoke hole.In addition, with being wound into coil configuration under the state of reservation shape in advance after on the back of the body yoke, will carry on the back yoke and a plurality of indented joint, thereby can easily assemble stator core.Perhaps, with being wound into coil under the state of reservation shape in advance after the tooth configuration, will carry on the back yoke and a plurality of indented joint, thereby can easily assemble stator core.

In addition, in order to realize the 3rd purpose, the manufacture method of the motor of the 22nd scheme, this motor comprises: with predetermined rotating shaft is the rotor that the center is rotated; And stator, it has and the described rotor devices spaced apart opposed stator core in ground and be installed in coil on this stator core, and the described stator core of described stator has: with the described rotating shaft back of the body yoke of the roughly disc-shape of quadrature roughly; And a plurality of teeth, they circumferentially are configured on the axial end face of described rotation of described back of the body yoke to hold up the mode edge of coming from described back of the body yoke towards described rotating shaft direction, the utilization compressed-core that the magnetic powder is fixed forms, described tooth is imbedded in the described back of the body yoke with desired depth on described rotating shaft direction, perhaps, described tooth is imbedded wherein in the mode that runs through in the described back of the body yoke on described rotating shaft direction, the manufacture method of this motor comprises the steps: around the 1st insulant and the 2nd insulant, the reel step of described coil, wherein, the 1st insulant and the 2nd insulant are configured around the volume core that has with the roughly the same coiling portion of the shape of described tooth, the 1st insulant makes described back of the body yoke and described coil insulation, and the 2nd insulant makes described tooth and described coil insulation; Described the 1st insulant, described the 2nd insulant and described coil are embedded in step on the described tooth; And with the step of described back of the body yoke and described a plurality of indented joints.

Thus, the processing radius that can can't harm motor characteristic and easily produce tooth on tooth and the junction surface that engages of back of the body yoke can not produce the motor of interference with the bight in back of the body yoke hole.In addition, after the 1st insulant and the 2nd insulant coiling coil around be configured in the volume core that has with the roughly the same coiling portion of the shape of tooth, stator core is embedded in the 1st insulant and the 2nd insulant that is wound with coil, therefore, can assembles stator core easily.Thus, for example, be difficult under situation tooth is fixing with instrument, applying strong tension force when perhaps reeling coil, be wound on the tooth and under the inadequate situation of intensity, can easily carry out the assembling of stator core.

Manufacture method according to the motor of the 21st scheme, the 23rd scheme is, opposed each face of described stator and described rotor, be and described rotating shaft plane orthogonal roughly, in step with described back of the body yoke and described a plurality of indented joints, the plane with described rotor 1031 opposed sides with described tooth is a benchmark, with described back of the body yoke and described a plurality of indented joint together.

Thus, owing to be to be benchmark with described tooth and the plane rotor opposite side, with back of the body yoke and indented joint together, so, improved the precision of air gap.

Manufacture method according to the motor of the 22nd scheme, the 24th scheme is, opposed each face of described stator and described rotor, be and described rotating shaft plane orthogonal roughly, in step with described back of the body yoke and described a plurality of indented joints, the plane with the opposed side of described rotor with described tooth is a benchmark, with described back of the body yoke and described a plurality of indented joint together.

Thus, owing to be to be benchmark with described tooth and the plane rotor opposite side, with back of the body yoke and indented joint together, so improved the precision of air gap.

In order to realize the 3rd purpose, the compressor of the 25th scheme is mounted with the motor of arbitrary scheme in the 13rd～the 20th.

Therefore, aspect the purposes of bigger output, described motor be can load, thereby miniaturization, high efficiency (by reducing copper loss) realized as the axial gap type motor that loads difficulty.

In order to realize the 4th purpose, the manufacture method of the armature core of the 26th scheme, this armature core comprises: have the back of the body yoke with the roughly disc-shape of the interarea of rotation approximate vertical; And a plurality of teeth to set regularly around described axle from the outstanding mode of an interarea of described back of the body yoke, the manufacture method of this armature core has following operation: (a), utilize thin plate along described axially stacked stacked steel plate, form the operation with the fixing back of the body yoke with recess of tooth; And (b), under the state that described back of the body yoke is fixed in the shaping dies, fixing described tooth is in described tooth with in the recess and with compressed-core described tooth is carried out the operation of die forming from the fixing mode of giving prominence to of this tooth with recess.

Thus, when forming back of the body yoke, form tooth with compressed-core with stacked steel plate, thereby, can't harm motor characteristic, can guarantee the intensity of stator core.In addition, formation has the fixing back of the body yoke with recess of tooth, and be fixed under the state on the shaping dies will carrying on the back yoke, with compressed-core that described tooth die forming is fixing with giving prominence to recess in the recess and from this tooth is fixing for being in described tooth, thereby, can prevent the breakage of tooth, and can eliminate tooth and the gap of carrying on the back yoke, keep securely.

According to the manufacture method of the armature core of the 26th scheme, the 27th scheme is, forms jog in recess in that described tooth is fixing.

Thus, can prevent extracting of tooth effectively.

According to the manufacture method of the armature core of the 29th scheme, the 28th scheme is that described jog has and the rightabout bearing surface of the projected direction of described tooth.

Thus, can prevent tooth extracting effectively towards projected direction.

Manufacture method according to the armature core of arbitrary scheme in the 26th～the 28th, the 29th scheme is, described operation (a) is to form the operation of cutting apart according to a plurality of described teeth of carrying on the back yoke of cutting apart, described operation (b), be that the described back of the body yoke of respectively cutting apart is being fixed under the state in the shaping dies, fixing described tooth is in described tooth with in the recess and from the fixing mode of giving prominence to of this tooth with recess, described tooth is carried out the operation of die forming with compressed-core, in described operation (b) afterwards, also comprise: (c), make the described back of the body yoke incorporate operation of respectively cutting apart.

Thus, in described operation (a), form cut apart according to described each tooth cut apart back of the body yoke, described operation (b), be that the described back of the body yoke of respectively cutting apart is being fixed under the state in the shaping dies, described tooth is fixing to carry out die forming with compressed-core to described tooth with in the recess and from the fixing mode of giving prominence to recess of this tooth so that described tooth is in, thereby, can use small-sized shaping dies as shaping dies, also handle easily in addition.

According to the manufacture method of the armature core of the 29th scheme, the 30th scheme is at the terminal part of described tooth, to be formed with outwards outstanding flange part.

Thus, can increase the opposed area with the excitation element, and then can increase interlinkage flux.

According to the manufacture method of the armature core of the 29th or the 30th scheme, the 31st scheme is between described operation (b) and described operation (c), also to be included in the operation of coiling coil on described each tooth.

Like this, cut apart back of the body yoke, thereby easily on each tooth, reel coil by formation.

According to the manufacture method of the armature core of arbitrary scheme in the 26th～the 31st, the 32nd scheme is, in described back of the body yoke, with another interarea of a described opposite side of interarea on, be provided with tooth.

Thus, about the tooth of this another interarea, also can keep tooth and back of the body yoke securely with little magnetic resistance.

According to the manufacture method of the armature core of arbitrary scheme in the 26th～the 32nd, the 33rd scheme is that in described tooth, fillet is made in the bight of the part of coiling coil.

Thus, can prevent the defective in bight, can avoid coil to roll up too slightly.

According to the manufacture method of the armature core of the 33rd scheme, the 34th scheme is, more than the twice of the diameter of the winding wire that the described corner radius of making fillet is reeled.

Thus, can prevent to roll up too slightly effectively.

In order to realize the 4th purpose, the armature core of the 35th scheme is that this armature core comprises: have the back of the body yoke with the roughly disc-shape of the interarea of rotation approximate vertical; And tooth to set regularly around described axle from the outstanding mode of an interarea of described back of the body yoke, wherein, described back of the body yoke utilizes thin plate is formed along described axially stacked stacked steel plate, and having the fixing recess of using of tooth, described tooth is to fix the mode compressed-core die forming of using the recess sectoral integration with the described tooth of described back of the body yoke.

Thus, form back of the body yoke, and form tooth with compressed-core with stacked steel plate, thereby, can't harm motor characteristic, can guarantee the intensity of stator core.In addition, described tooth is used the compressed-core die forming to fix the mode of using the recess sectoral integration with the described tooth of described back of the body yoke.So, can prevent the breakage of tooth, and can eliminate tooth maintenance securely with the gap of back of the body yoke.

Purpose of the present invention, feature, situation and advantage, by detailed description and accompanying drawing hereinafter, can be clearer.

Description of drawings

Fig. 1 is the profile of major part of the motor of execution mode A1.

Fig. 2 is the exploded perspective view of stator of the motor of Fig. 1.

Fig. 3 is the profile of the 1st variation of the motor of the above-mentioned execution mode A1 of expression.

Fig. 4 is the profile of the 2nd variation of the motor of the above-mentioned execution mode A1 of expression.

Fig. 5 is the profile of the 3rd variation of the motor of the above-mentioned execution mode A1 of expression.

Fig. 6 is the figure of manufacture method that is used to illustrate the motor of above-mentioned the 1st variation.

Fig. 7 is the vertical view of above-mentioned motor stator.

Fig. 8 is the vertical view of the stator except the wide width part of above-mentioned motor.

Fig. 9 is the profile of the 4th variation of the motor of the above-mentioned execution mode A1 of expression.

Figure 10 is the exploded perspective view of stator of the 4th variation of the motor of Fig. 9.

Figure 11 is the exploded perspective view when stress mitigation hole is set on the back of the body yoke of stator shown in Figure 10.

Figure 12 is illustrated in the one-sided exploded perspective view that is provided with the rotor shapes of stator.

Figure 13 is the profile of major part of the motor of execution mode A2.

Figure 14 is illustrated in the exploded perspective view that both sides have the rotor shapes of stator.

Figure 15 is the profile of major part of the motor of execution mode A3.

Figure 16 is the exploded perspective view of shape of the stator of the described motor of expression.

Figure 17 is the exploded perspective view of example of the stator of expression distributed winding.

Figure 18 is the profile of major part of the motor of execution mode A4.

Figure 19 is the sectional arrangement drawing of the hermetic type compressor of execution mode A5.

Figure 20 is the profile of major part of the motor of execution mode B1.

Figure 21 is the exploded perspective view of stator of the motor of Figure 20.

Figure 22 is the amplification profile of described motor.

Figure 23 is the profile of the 1st variation of the described motor of expression.

Figure 24 is the profile of the 2nd variation of the described motor of expression.

Figure 25 is the profile of the 3rd variation of the described motor of expression.

Figure 26 is the profile of the 4th variation of the described motor of expression.

Figure 27 is the profile of the 5th variation of the described motor of expression.

Figure 28 is the figure of manufacture method that is used to illustrate the motor of the 5th variation shown in Figure 27.

Figure 29 is the vertical view of the stator of described motor.

Figure 30 is the vertical view of the stator except the wide width part of described motor.

Figure 31 is the figure of an example of motor rotor with stator of be illustrated in this execution mode B1 one-sided.

Figure 32 is the sectional arrangement drawing of closed rotary compressor that is mounted with the motor of execution mode B2.

Figure 33 is the profile of major part of the motor of execution mode B3.

Figure 34 is the profile of the axial gap type motor of expression execution mode C1.

Figure 35 is the exploded perspective view of expression armature core and coil.

Figure 36 is the process chart of manufacture method of the armature core of expression execution mode C1.

Figure 37 is the key diagram of an operation of this manufacture method of expression.

Figure 38 is the fixing profile of using the 1st variation of recess of tooth of expression execution mode C1.

Figure 39 is the fixing profile of using the 2nd variation of recess of tooth of expression execution mode C1.

Figure 40 is the fixing profile of using the 3rd variation of recess of tooth of expression execution mode C1.

Figure 41 is the figure of variation of the coil winding method of expression execution mode C1.

Figure 42 is the figure that sets the variation of stator in the rotor both sides of expression execution mode C1.

Figure 43 is the figure that sets the variation of rotor in the stator both sides of expression execution mode C1.

Figure 44 is the stereogram of the armature core of expression execution mode C2.

Figure 45 is the key diagram of the operation of manufacture method of expression execution mode C2.

Figure 46 is the key diagram of the operation of manufacture method of expression execution mode C2.

Figure 47 is the key diagram of the operation of manufacture method of expression execution mode C2.

Figure 48 is the process chart of the manufacture method of expression execution mode C2.

Figure 49 is the stereogram that the variation of tooth is set on the two sides side of carrying on the back yoke of cutting apart of expression execution mode C2.

Figure 50 is the profile of the compressor of expression execution mode C3.

Embodiment

(execution mode A1)

Fig. 1 expresses the profile of major part of the motor of execution mode A1, and Fig. 2 has represented the exploded perspective view of the stator of motor shown in Figure 1.

As shown in Figure 1, the motor of present embodiment A1 has: stator 21; Be configured in the rotor 31 of these stator 21 tops across air gap 41; And axle 20, it is fixed on this rotor 31 and the revolving force of this rotor 31 is passed to load, and extends ground from this rotor 31 and be provided with, and rotation is supported on the bearing (not shown) freely.Described rotor 31 is that the center is rotated with the axis as the axle 20 of being scheduled to rotating shaft.

Described stator 21 has: by for example being pressed into or shrink fit is installed in the stator core 24 of housing 10 inboards; And be installed in coil (coil) 23 on this stator core 24.

Described stator core 24 has: with axle 20 roughly orthogonally the configuration circular back of the body yoke 24a; And the upright tooth 24b that is located at rotor 31 1 sides of this back of the body yoke 24a.

The tooth 24b of described stator core 24 along axially extending towards rotor 31 sides of axle 20, and is provided with a plurality of around axle 20.Axle around described each tooth 24b is wound with coil 23 respectively.Described coil 23 just can produce axial magnetic flux through overexcitation on tooth 24b.The mode that described coil 23 forms on stator core 24 so-called " concentrating winding ".Should " concentrate winding " be that coiling is simple and can reduce the winding mode of copper use amount.

As shown in Figure 2, described tooth 24b and coil 23 have 6 respectively, and stator 21 is 4 utmost points.In other words, can think that described stator 21 is equivalent to concentrate winding 4 utmost points 6 grooves.In addition, coil 23 for example upwards is being configured to U phase, V phase, W phase, U phase, V phase, W phase week, and per 3 are the star line mutually, from the converter supplying electric current.Here, tooth 24b is made of compressed-core, and the part of this tooth 24b is embedded under the state among the recess 24c that is provided with on back of the body yoke 24a and fixes, described back of the body yoke 24a by will with axle 20 roughly the electromagnetic steel plate of quadrature constitute along axially stacked.Therefore, tooth 24b is outstanding independently respectively, but links to each other by back of the body yoke 24a.The fixed form of described tooth 24b, available be pressed into or bonding etc.Adopt for example dust core as compressed-core.In addition, electromagnetic steel plate is known as so-called silicon steel plate, but in addition, also can use thin plates such as non-crystalline type, permalloy.These can be selected according to the characteristic of necessity.

In addition, the degree of depth of the recess 24c of back of the body yoke 24a is preferably in magnetic flux has the scope of axial component.For example, if the magnetic flux density of back of the body yoke 24a almost near the zone of saturation, the thickness of the degree of depth of just preferred recess 24c and back of the body yoke 24a be degree about equally, perhaps preferred tooth 24b connects and carries on the back yoke 24a.In general, the degree of depth of recess 24c must carried on the back the over half of yoke 24a thickness.Like this, because magnetic flux arrives after the fully dark degree of depth by compressed-core, magnetic flux also spreads all over the back of the body yoke 24a that is made of stacked steel plate, so can reduce magnetic resistance, iron loss is diminished.In addition, by the magnetic flux of back of the body yoke 24a, be included in magnetic flux that flows among this tooth 24b and the magnetic flux that passes through this tooth 24b and in adjacent tooth 24b, flow.The back of the body yoke 24a of the latter by constituting by stacked steel plate.

As shown in Figure 1, described rotor 31 has be installed in the circular back of the body yoke 34 of axle on 20 and the permanent magnet 33 that is provided with on a face of stator 21 sides of this back of the body yoke 34.In addition, the internal diameter of the back of the body yoke 24a of described stator core 24 arrives and axle 20 discontiguous degree greatly.Or also can be arranged to the bearing that axle 20 usefulness can be set shown in Figure 1 on the inner-diameter portion whose of back of the body yoke 24a.

The back of the body yoke 34 of described rotor 31 is made of magnetic.Described permanent magnet 33 axle 20 circumferentially on alternately have different magnetic poles, produce the magnetic flux on the direction of axle 20.

Fig. 3 expresses the profile of the 1st variation of the motor of above-mentioned execution mode A1.The component part that this motor is identical with motor shown in Figure 1 is indicated identical reference symbol.

As shown in Figure 3, the interior embedding part 100 of yoke 124a is carried on the back in imbedding of tooth 124b, than other parts of fine, and the location when realizing inserting with this.Thereby improved the precision of air gap.

Be provided with the gap between the end side of the various piece in the recess 124c that imbeds back of the body yoke 124a among described a plurality of tooth 124b and the back of the body yoke 124a, axially do not contacting with back of the body yoke 124a at recess 124c internal tooth 124b, thereby can stop magnetic flux passing through vertically in back of the body yoke 124a.Like this, can suppress the increase of iron loss effectively.In addition, use in the magnetic saturation zone under the situation of back of the body yoke 124a, the gap is the smaller the better, as long as it is just passable to imbed the magnetic bonding agent.The magnetic bonding agent is compared with electromagnetic steel plate or compressed-core, and permeability is low, but than the permeability height of air, so have the magnetically saturated effect of mitigation.But, about recess, except the bottom, between tooth 124b and back of the body yoke 124a, the gap is not set.In addition, when forming tooth 124b,, here form by compressed-core, so make easily owing to tooth though need multiple kinds of molds with stacked steel plate.

In addition, Fig. 4 expresses the profile of the 2nd variation of the motor of above-mentioned execution mode A1.In this Fig. 4, the component part identical with motor shown in Figure 1 indicated identical reference symbol.

As shown in Figure 4, stator 221 has by for example being pressed into or shrink fit is installed in the stator core 224 of housing 10 inboards; And be installed in coil 223 on this stator core 224.

Described stator core 224 has: the circular back of the body yoke 224a that roughly disposes orthogonally with axle 20 reaches the upright tooth 224b that is located at rotor 31 1 sides of this back of the body yoke 224a.Described tooth 224b axially extends towards rotor 31 sides along axle 20, and is provided with a plurality of around axle 20.Axle around described each tooth 224b is wound with coil 223 respectively.Described coil 223 just can produce axial magnetic flux through overexcitation on tooth 224b.

Described tooth 224b and coil 223 have 6 respectively, and stator 221 is 4 utmost points.In addition, coil 223 for example 3 is the star line mutually, from the converter supplying electric current.Here, tooth 224b is made of compressed-core, and the part of this tooth 224b is embedded under the state among the recess 224c that is provided with on back of the body yoke 224a and fixes, described back of the body yoke 224a by will with axle 20 roughly the electromagnetic steel plate of quadrature constitute along axially stacked.Whereby, tooth 224b is outstanding independently respectively, but links to each other by back of the body yoke 224a.The fixed form of this tooth 224b, available be pressed into or bonding etc.

As shown in Figure 4, the part in the recess 224c that imbeds back of the body yoke 224a of described tooth 224b is suitable for making the taper shape.Thus, first:, come out from back of the body yoke 224a, so few more the closer to terminal magnetic flux owing to the magnetic flux of imbedding the part of carrying on the back yoke 224a by tooth 224b at once.Second: can reduce the amount of magnetic flux by compressed-core inside as far as possible, the magnetic flux in the back of the body yoke can be as much as possible by with the face of axial quadrature.The the 3rd: when inserting tooth 224b in the back of the body yoke 224a, owing to stress acts on equably, so be not easy to take place the situation of iron core breakage.The the 4th: can be used as the wedge that pulls out that is easy to extract usefulness when compressed-core is shaped from mould.In addition, the shape of taper also may not be continuous, can also be to be step-likely to narrow down.Narrow down in order to reduce the species number of the punching press shape of carrying on the back yoke 224a, to be step-likely certainly.

Here, Fig. 5 represents the profile of the 3rd variation of the motor of above-mentioned execution mode A1.In this Fig. 5, the component part identical with motor shown in Figure 1 indicated identical reference symbol.

As shown in Figure 5, stator 321 has by for example being pressed into or shrink fit is installed in the stator core 324 of housing 10 inboards; And be installed in coil 323 on this stator core 324.

Described stator core 324 has: the circular back of the body yoke 324a that roughly disposes orthogonally with axle 20 reaches the upright tooth 324b that is located at rotor 31 1 sides of this back of the body yoke 324a.Described tooth 324b axially extends towards rotor 31 sides along axle 20, and is provided with a plurality of around axle 20.Axle around described each tooth 324b is wound with coil 323 respectively.Described coil 323 just can produce axial magnetic flux through overexcitation on tooth 324b.

Described tooth 324b and coil 323 have 6 respectively, and stator 321 is 4 utmost points.In addition, coil 323 for example 3 is the star line mutually, from the converter supplying electric current.Here, tooth 324b is made of compressed-core, and the part of this tooth 324b is embedded under the state among the recess 324c that is provided with on back of the body yoke 324a and fixes, described back of the body yoke 324a by will with axle 20 roughly the electromagnetic steel plate of quadrature constitute along axially stacked.Whereby, tooth 324b is outstanding independently respectively, but links to each other by back of the body yoke 324a.The fixed form of described tooth 324b, available be pressed into or bonding etc.

As shown in Figure 5, be suitable for, be provided with the wide width part 324d of at least a portion that covers coil 313 with the opposed side of the air gap of tooth 324b as the shape of stator core.

By on a plurality of tooth 324b of described stator core 324, wide width part 324c being set, can increase and rotor 31 opposed areas with rotor 31 opposed sides, increase interlinkage flux.In addition, described wide width part 324c also becomes the device that prevents that effectively coil 313 from contacting with rotor 31.

Then, narrate the assemble method of the stator shown in Figure 5 324 of described motor.

Fig. 6 is the key diagram of manufacture method that is used to illustrate the motor of above-mentioned the 3rd variation, as shown in Figure 6, makes and the face of the opposed side in the gap of tooth 24b (wide width part 24d) the datum level 300a towards instrument 300, and tooth 324b is positioned on the instrument 300.

Then, on the tooth 324b on the instrument 300, outer embedding ground configuration is the coil 323 of neat coiling in advance in mounting.At this moment, the insulation of coil 323 and tooth 324b and back of the body yoke 324a can be arranged on coil 323 sides or be arranged on tooth 324b and any side of back of the body yoke 324a side.

In addition,, will carry on the back yoke 324a and be positioned on the tooth 324b from the top having disposed under the state of coil 323 around tooth 324b, the top of tooth 324b is imbedded in the recess 324c that carries on the back yoke 324a after, will carry on the back yoke 324a and engage with tooth 324b.The upper surface of instrument 300 is the high plane of precision.

According to the manufacture method of above-mentioned motor, can easily assemble stator core 321.In addition, the state coil configuration down of reeling with reservation shape in advance after carrying on the back on the yoke, even will carry on the back yoke and a plurality of indented joint, also can easily be assembled stator core.

In addition, owing to be that the plane with rotor 31 opposed sides with described tooth 324b is a benchmark, back of the body yoke 324a and tooth 324b are bonded together, so, the precision of air gap improved.

As Fig. 7, shown in Figure 8, described wide width part 324d and adjacent wide width part 324d between, be provided with carrying out the certain space 325 of magnetic insulation between the tooth 324b.This space 325 from the center of wide width part 324d to radial outside with radial extension.By this structure, owing to increased and air gap 41 opposed stator core areas, so can increase interlinkage flux.In addition, in adjacent wide width part 324d, the part (region S 1 of Fig. 7) that is positioned at the part (region S 2 of Fig. 7) of all sides and is positioned at outer circumferential side with respect to pivot can have contact (or connection) each other slightly.In this case, before tooth 324b being installed on the back of the body yoke 324a, can limit tooth 324b position relation each other.The area of preferred contact site is less, makes leakage field is limited in Min..

Fig. 9 represents the profile of the 4th variation of the motor of above-mentioned execution mode A1.In this Fig. 9, the component part identical with motor shown in Figure 1 indicated identical reference symbol.The stator core 421 of motor shown in Figure 9 shows the situation that tooth 424b connects back of the body yoke 424a.

As shown in Figure 9, described stator 421 has by for example being pressed into or shrink fit is installed in the stator core 424 of housing 10 inboards; And be installed in coil 423 on this stator core 424.

Described stator core 424 has: the circular back of the body yoke 424a that roughly disposes orthogonally with axle 20 reaches the upright tooth 424b that is located at rotor 31 1 sides of this back of the body yoke 424a.Described tooth 424b axially extends towards rotor 31 sides along axle 20, and is provided with a plurality of around axle 20.Axle around described each tooth 424b is wound with coil 423 respectively.Described coil 423 just can produce axial magnetic flux through overexcitation on tooth 424b.

In addition, Figure 10 is the exploded perspective view of stator of the 4th variation of the motor of Fig. 9.As shown in figure 10, described tooth 424b and coil 423 have 6 respectively, and stator 421 is 4 utmost points.In addition, coil 423 for example 3 is the star line mutually, from the converter supplying electric current.Here, tooth 424b is made of compressed-core, the part of this tooth 424b is embedded under the state among the through hole 424c that is provided with on back of the body yoke 424a and fixes, described back of the body yoke 424a by will with axle 20 roughly the electromagnetic steel plate of quadrature constitute along axially stacked.Whereby, tooth 424b is outstanding independently respectively, but links to each other by back of the body yoke 424a.The fixed form of described tooth 424b, available be pressed into or bonding etc.

Further, in the stator of Fig. 9, the 4th variation shown in Figure 10, as shown in figure 11, also can stress be set relax hole 401,402 at the interior all sides and the outer circumferential side that be used for a plurality of tooth 424b are embedded in the set a plurality of through hole 424c of back of the body yoke 424a.In this case, relax hole 401,402 by set stress on back of the body yoke 424a, can relax by be pressed into or shrink fit etc. tooth 424b is remained on the stress that radially acts on when back of the body yoke 424a goes up on the back of the body yoke 424a, and, the stress of outer circumferential side relaxes hole 402, can relax the stress that radially acts on when remaining on tooth 424b on the housing 10 on the back of the body yoke 424a by be pressed into or shrink fit etc., thus can keep the precision of air gap, and harmless motor characteristic.In addition, the stress of interior all sides mitigation hole 401 for example under the situation as the housing use that keeps bearing in the back of the body yoke week, can also keep the quadrature precision with axle.

In addition, stress mitigation hole also can be arranged on interior all sides or outer circumferential side one side.

Figure 12 shows the one-sided example that is provided with the motor rotor shape of stator at present embodiment A1.Described rotor 31 has permanent magnet 33, so, when motor operation,, can realize the height output and the high efficiency of compressor owing to can improve the magnetic flux density of air gap 41 (shown in Figure 1).In addition, described permanent magnet 33 not necessarily.

In addition, described rotor 31 has the rotor plate 35 that clips permanent magnet 33 with back of the body yoke 34.Described rotor plate 35 is made of magnetic, is provided with carrying out the groove 35a of magnetic insulation between the adjacent pole in the permanent magnet 33.Described groove 35a from the center of rotor plate 35 towards radial outside with radial extension.Described groove 35a only is arranged on the rotor plate 35, and is not located on the back of the body yoke 34.In addition, because demagnetizing field does not directly act on described permanent magnet 33, so the demagnetization resistance has also increased.Further, use at described permanent magnet 33 under the situation of sintering rare-earth class magnet etc., because the higher harmonic wave component of magnetic flux is difficult to arrive the inside of permanent magnet 33, thus can be suppressed at the permanent magnet 33 inner eddy current that produce, thus the rising that realization is reduced the loss and reduced temperature.In addition, described rotor plate 35 neither be necessary.

Motor according to said structure, in tooth 24b, 124b, 224b, 324b, 424b, used the little compressed-core that the magnetic powder is fixed of eddy current loss, and by the back of the body yoke 24a, 124a, 224a, 324a, the 424a that are pressed into or maintenance such as shrink fit is made of the stacked steel plate with sufficient intensity, therefore can't harm motor characteristic, can realize keeping the motor of stator core 24,124,224,324,424 by be pressed into or shrink fit etc.

In addition and since described a plurality of tooth 124b, 224b imbed various piece in back of the body yoke 124a, the 224a, than other parts of fine of not imbedding in back of the body yoke 124a, the 224a, so the precision of air gap has been improved in the location can realize inserting easily the time.

In addition, owing to can provide described stator 21,121,221,321,421 and rotor 31 opposed each faces to be and the axle 20 axial gap type motor of plane orthogonal roughly, can dwindle axial dimension, the realization miniaturization.

In addition, owing to used rotor 31 with permanent magnet 33, thereby magnetic flux by the permanent magnet generation, can make the magnetic flux that contains a large amount of higher harmonics pass tooth 24b, 124b, 224b, 324b, 424b, but, because tooth 24b, 124b, 224b, 324b, 424b have used the little compressed-core of eddy current loss, so, iron loss can further be reduced.

In addition, the peripheral part of back of the body yoke 24a by will constituting by stacked steel plate, 124a, 224a, 324a, 424a with sufficient intensity be pressed into or shrink fit to the inboard of housing 10, can reliably back of the body yoke 24a, 124a, 224a, 324a, 424a be remained on the housing 10.

(execution mode A2)

Figure 13 expresses the profile of major part of the motor of execution mode A2.

As shown in figure 13, the motor of present embodiment A2 has rotor 431 that is installed on the axle 420 and two stators 421 that are configured in the axial both sides of this rotor 431.Described rotor 431 is that the center is rotated with the axis as the axle 420 of being scheduled to rotating shaft.Described stator 421 uses the stator shown in Figure 9 421 of execution mode A1.Described rotor 431 has two rotor plates 435 and is configured in permanent magnet 433 between these two rotors 435.

Though the structure of the stator 421 of the motor of above-mentioned execution mode A2 is identical with the stator of the 4th variation shown in Figure 9, but, because two positions spaced apart in housing 10 inside embed back of the body yoke 424, so have the effect of the rigidity that can improve housing 10.In addition, in the motor of this execution mode A2, from the attraction force acts of the stator 421 of axial both sides in rotor 431, therefore, but negative function (thrust) power that pushes away on rotor 431 and axle 420 also can reduce on thrust direction the power of the bearing (not shown) of back shaft 20 relatively.Further, concerning two groups of stators 421 up and down, owing to can utilize two faces of permanent magnet 433, thus can make the number of permanent magnet minimum.

In addition, Figure 14 shows an example of the rotor shapes of the motor that is provided with stator in both sides.As shown in figure 14, described rotor 531 has: roughly discoideus back of the body yoke 534; Be configured in the permanent magnet 533 and the rotor plate 535 of these back of the body yoke 534 both sides.

As shown in figure 14, the both sides that show rotor 531 present magnetic pole, this rotor 531 is the situation of 2 utmost points.In addition, back of the body yoke 534 is not necessarily omitting under the situation of carrying on the back yoke 534, and permanent magnet 533 can be in the side in upside or the downside.

As shown in figure 14, described rotor 531 is in an axial side of the discoideus back of the body yoke 534 that is made of magnetic with medium pore 534a, show 2 fan-shaped permanent magnets 533 along circumferential row,, show 2 fan-shaped permanent magnets 533 along circumferential row at the axial opposite side of back of the body yoke 534.The permanent magnet 533 of described back of the body yoke 534 both sides is configured on the opposed position.In described back of the body yoke 534 both sides, be provided with magnetic 534b along the zone between 2 permanent magnets 533 of circumferential array.Discoideus rotor plate 535 with medium pore 535a is configured to, and from its axial both sides rotor plate 535 is clamped on the back of the body yoke 534 that is arranged with described permanent magnet 533, and back of the body yoke 534, permanent magnet 533 and rotor plate 535 are overlapped.In addition, on described rotor plate 535, be provided with 4 groove 535b, between groove 535b, alternately be equipped with permanent magnet 533 and magnetic 534b with radial.

In the formation of described rotor 531, easily fixing permanent magnet 533, also can easily rotor 531 be remained on the rotating shaft.In addition, by the magnetic pole distribution of rotor 531 both sides is staggered, also can realize skew (skew) effect.In addition, the magnetic pole of the permanent magnet 533 of back of the body yoke 534 axial both sides can be identical, also can be opposite, and multi-form according to magnetic pole still, the configuration difference of stator coil.Under the identical situation of both sides magnetic pole, the thickness of back of the body yoke 534 is important, but under the opposite situation of both sides magnetic pole, and back of the body yoke 534 is only in that magnetic flux is passed through is just enough.In addition, in described rotor 531, the magnet that acts on the upside stator is independently with the magnet that acts on the downside stator, so the device of generation axial force also can be the device of the area of the thickness of change magnet, magnetic pole, ceiling capacity accumulation etc.In this case, the magnetic pole of the permanent magnet of both sides is identical can more to produce effect, but the magnetic pole of the permanent magnet of both sides also is passable on the contrary.

In addition, Figure 17 shows the example of stator of the distributed winding of the motor that is used for above-mentioned execution mode A1, A2, and this stator presents the magnetic pole of 2 utmost points.

Dispose stator 421 in mode, thereby can increase interlinkage flux, improve output from the described rotor 431 of axial sandwich.

As shown in figure 17, described stator core 724 has: with the roughly circular back of the body yoke 724a of configuration and the axle extension from this back of the body yoke 724a along stator 721 and along the 1st of circumferential array～the 6th tooth 724b orthogonally of axle.On described tooth 724b, along the axle of stator 721 with from bottom to top be sequentially set with the group 723A of coil lower floor, coil middle level group 723B and coil upper layer group 723C.About the material of the back of the body yoke 724a and tooth 724b and divide other combination, with identical shown in the execution mode A1.

The described coil group 723A of lower floor has: the coil 723 that the 1st, the 2nd and the 3rd tooth 724b is reeled in the lump; And the coil 723 that the 4th, the 5th and the 6th tooth 724b is reeled in the lump.In addition, described coil middle level group 723B has: with the 2nd, the 3rd and the 4th tooth 724b-and the coil 723 of reeling; And the coil 723 that the 5th, the 6th and the 1st tooth 724b is reeled in the lump.In addition, described coil upper layer group 723C has: the coil 723 that the 3rd, the 4th and the 5th tooth 724b is reeled in the lump; And the coil 723 that the 6th, the 1st and the 2nd tooth 724b is reeled in the lump.

Formation is the U phase with the described coil group 723A of lower floor, and coil middle level group 723B is the V phase, and coil upper layer group 723C is 3 phase windings of W phase (can exchange mutually), and they are supplied with 3 phase currents that scheduled current or voltage and rectification are preset frequency respectively.

About the stator 721 of described distributed winding, owing to can increase interlinkage flux, heterogeneous cooperation produces magnetic flux, so flux change is level and smooth, can realize low vibration and low noise.

In addition, in the motor of above-mentioned execution mode A1, A2, the spiral mode is not limited to concentrate winding, distributed winding, wavy winding etc., can freely select.In addition, the combination of stator tooth number and rotor number of poles and ratio can freely be selected.

(execution mode A3)

Figure 15 expresses the profile of major part of the motor of execution mode A3.As shown in figure 15, the motor that shows this execution mode A3 is provided with the situation of rotor 31 in stator 621 both sides.In Figure 15, the terminal part of tooth 624b broadens, and has improved the permeability of air gap.

As shown in figure 15, because a plurality of tooth 624b of stator core 624 have the wide width part 624c that is arranged on rotor 31 opposed sides,, increase interlinkage flux so can increase and rotor 31 opposed areas.In addition, by with the rotor 31 of attraction force acts in the axial both sides of described stator 621, but the therefore thrust of negative function on rotor 31 and axle 20 also can reduce on thrust direction the power of the bearing of back shaft 20 relatively.

At this moment, owing to be provided with wide width part 624c in the both-side ends of tooth 624b, tooth 624b can not be from axial insertion back of the body yoke 624a.

Given this, as shown in figure 16, back of the body yoke 624a is provided with grooving 600 in the position that is positioned at radial outside than tooth 624b of back of the body yoke 624a in tooth 624b imbeds the circumferential Breadth Maximum scope of the part among the back of the body yoke 624a.By means of this grooving 600, can tooth 624b be inserted the back of the body yoke 624a from the outside.At this moment, with being performed of tooth 624b the part of spiral compare, the part of imbedding among the back of the body yoke 624a attenuates, and can be suitable for carrying out axial location.In addition, because coil 623 can not be from axial insertion tooth 624b, so utilize coil winding machine (not shown) directly coil 623 to be wound on the tooth 624b.In addition, this execution mode A3 can be used on and concentrates the winding aspect.In addition, in Figure 16, for facility, tooth 624b and coil 623 have all only been narrated one, and have omitted other.

In addition, in the back of the body yoke 624a of described stator core 624, by grooving 600 being set, thereby when assembling, tooth 624b is inserted the back of the body yoke 624a, assemble easily from radial outside at the regional radial outside that disposes a plurality of tooth 624b.In addition, even only stator one-sided across air gap and with the opposed form of rotor in, also can use this structure.

(execution mode A4)

Figure 18 expresses the profile of major part of the motor of execution mode A4.The motor of this execution mode A4 is with the difference of the motor of execution mode A1, is not the axial gap type motor.

As shown in figure 18, the motor of this execution mode A4 has: stator 821; Be configured in the rotor 831 on this stator 821; And axle 820, it is fixed on this rotor 831 and the revolving force of this rotor 381 is passed to load, and extends ground from this rotor 831 and be provided with, and can be supported on the bearing (not shown) with rotating freely.Described rotor 831 is that the center is rotated with the axis as the axle 820 of being scheduled to rotating shaft.

Described stator 821 has: by for example being pressed into or shrink fit is installed in the stator core 824 of housing 10 inboards; And be installed in coil 823 on this stator core 824.

Described stator core 824 has: with axle 820 roughly orthogonally the configuration circular back of the body yoke 824a; And the upright tooth 824b that is located at rotor 831 1 sides of this back of the body yoke 824a.

The tooth 824b of described stator core 824 along axially extending towards rotor 831 sides of axle 820, is provided with a plurality of around axle 820.Near the back of the body yoke 824a of described each tooth 824b and around axle, be wound with coil 823 respectively.Described coil 823 just can produce axial magnetic flux through overexcitation on tooth 824b.

In addition, described rotor 831 has: be installed in the discoideus rotor supports parts 835 on the axle 820; One end is fixed on the back of the body yoke 824 of the drum of these rotor supports parts 835 outer circumferential sides; And a plurality of permanent magnets 833 that are configured in all sides in this back of the body yoke 824.Described rotor 831 is fixed on the axle 820, by means of the bearing on the internal diameter of the back of the body yoke 824a that is arranged on rotor 821 or do not contact with the back of the body yoke 824a of rotor 821 and the bearing rotation that is arranged on housing 10 1 sides is held freely.

The motor of present embodiment A4 constitutes the outer rotor type motor of coming the back of the body yoke 824 of layout circle barrel shape in the mode of a plurality of tooth 824b upper portions of covering stator 821.Between permanent magnet 833 inner peripheral surfaces of described back of the body yoke 824a inboard and tooth 824b outer peripheral face, be provided with air gap 841.

Here, tooth 824b is made of compressed-core, in being arranged at the recess 824c that makes on the stacked vertically back of the body yoke 824a of electromagnetic steel plate, fixes under the state that a tooth 824b part is embedded in.Thus, tooth 824b is outstanding independently respectively, but links to each other by back of the body yoke 824a.The fixed form of described tooth 824b, available be pressed into or bonding etc.The magnetic flux of permanent magnet 833 flows to the face of the radial outside of tooth 824b from air gap, and magnetic flux axis direction side flow under the paper towards inner edge radially, and magnetic flux upwards flows towards adjacent tooth 824b in week via back of the body yoke 824a.Therefore, tooth 824b extremely is useful in the compressed-core that has identical magnetic characteristic on the either direction.

In addition, the degree of depth of the recess 824c of back of the body yoke 824a is preferably in magnetic flux has the scope of axial component.For example, if the magnetic flux density of back of the body yoke 824a almost near the zone of saturation, is the degree that equates with regard to the degree of depth of preferred recess 824c and the thickness of back of the body yoke 824a, perhaps preferred tooth 824b perforation back of the body yoke 824a.

In addition, in this execution mode A4, the 1st～the 4th variation of all right application implementation mode A1.

In addition, in this execution mode A4, also have permanent magnet, and then can also become the form (having the form of external rotor and axial rotor concurrently) of further generation moment of torsion in the inboard of rotor supports parts 835 (stator side).

(execution mode A5)

Figure 19 represents the sectional arrangement drawing of the closed-type compressor of execution mode A5.The compressor of present embodiment A5 uses the motor of execution mode A1.

As shown in figure 19, this compressor comprises: be configured in as the motor 2 in the closed container 1 of an example of housing; And compression unit 11, it is configured in the closed container 1 and at motor 2 downsides, is driven by this motor 2.Here, so-called above-below direction is meant along the direction of the central shaft of closed container 1, and no matter whether the relative horizontal plane of central shaft of closed container 1 tilts.

Described motor 2 is configured in the zone in the closed container 1 of filling the high-pressure refrigerant of discharging from compression unit 11.Particularly, in the closed container 1 high-pressure area H, this compressor is so-called high pressure arch form compressor.

Described motor 2 has: stator 21; Be configured in the rotor 31 of these stator 21 tops across air gap 41; And axle 20, it is fixed on this rotor 31 and the revolving force of this rotor 31 is delivered to compression unit 11, and extends ground from this rotor 31 and be provided with, and is kept by bearing.

In addition, described compression unit 11 comprises: cylindrical main body portion 12; And the upper head plate 15 and the bottom plate 16 that are installed in these main part 12 upper and lower opening ends respectively.Described axle 20 connects upper head plate 15 and bottom plate 16, enters the inside of main part 12.

In the inside of described main part 12, can dispose and be arranged on with revolving round the sun the chimeric roller 13 of the crank-pin 17 of axle on 20, the revolution motion by this roller 13 carries out compression.That is, between roller 13 outer surfaces and main part 12 inner surfaces, form discharge chambe 14.

Described closed container 1 has at the suction pipe 6 of discharge chambe 14 openings of compression unit 11 low-pressure sides and at the discharge pipe 7 of motor 2 upsides (downstream) opening.Described compression unit 11 has the tap 11a at motor 2 side openings.

One distolateral rotation of described axle 20 is supported on the bottom plate 16 of compression unit 11 freely, and the other end sideway swivel of axle 20 is supported on the stator 21 freely.

Downside in described closed container 1 is provided with the lubricating oil 8 for axle 20 bottoms dipping.This lubricating oil 8 rises to axle 20 inside by means of the rotation of axle 20, the sliding part of compression unit 11 etc. is lubricated.

Below, the effect of described compressor is described.

Cold-producing medium is supplied to the discharge chambe 14 of compression unit 11 from described suction pipe 6,2 drive compression portions 11 come compressed refrigerant by motor.Compressed cold-producing medium is with lubricating oil, is discharged in the closed container 1 from the tap 11a of compression unit 11, by motor 2, after being transported, is discharged to the outside of closed container 1 from discharge pipe 7 in the H of high-pressure area.

At this moment, refrigerant passage (not shown) need be arranged on the back of the body yoke inside of rotor 21.But position and shape are arbitrarily.

According to compressor that should execution mode A5, can be loaded in the bigger purposes aspect of output the axial gap type motor of difficulty is installed, can realize the compressor of miniaturization, high efficiency (realizing) by reducing copper loss.

In present embodiment A5, although understand the rotary compressor that uses the axial gap type motor, still, be not limited to rotary compressor, the present invention also is suitable for other compressors such as scroll compressor.

In addition, in above-mentioned execution mode A5, though utilize motor 2 to drive as the compression unit 11 that is driven portion,, being not limited to compression unit by the electric motor driven portion of being driven of the present invention, can also be to utilize the main axis rotation of motor and the portion that is driven of driven other structures.

In addition,, make cylinder be close to the air gap opposite one side, utilize rotor and cylinder to constitute discharge chambe with rotor if rotary compressor then can be that rotor itself is provided with moveable piston.At this moment, between rotor and compression mechanical part, do not need to be provided with axle.Further, fixed axis is extended from stator to rotor one side,, then do not need the axle that rotates with rotor is set, can prevent the vibration that reversing between rotor and the compression mechanical part causes if bearing is arranged between fixed axis and the rotor.Therefore, in this case, axle not necessarily.

(execution mode B1)

Figure 20 represents the profile of major part of the motor of execution mode B1, and Figure 22 is near the enlarged drawing the tooth portion.

As shown in figure 20, the motor of present embodiment B1 has: stator 1021; Be configured in the rotor 1031 of these stator 1021 tops across air gap 1041; And axle 1020, it is fixed on this rotor 1031 and the revolving force of this rotor 1031 is passed to load, and extends ground from this rotor 1031 and be provided with, and rotation is supported on the bearing (not shown) freely.Described rotor 1031 is that the center is rotated with the axis as the axle 1020 of being scheduled to rotating shaft.

Described stator 1021 has: by for example being pressed into or shrink fit is installed in the stator core 1024 of housing 1010 inboards; And be installed in coil 1023 on this stator core 1024.

Described stator core 1024 has: with axle 1020 roughly orthogonally the configuration circular back of the body yoke 1024a; And the upright tooth 1024b that is located at rotor 1,031 one sides of this back of the body yoke 1024a.

The tooth 1024b of described stator core 1024 along axially extending towards rotor 1031 sides of axle 1020, and is provided with a plurality of around axle 1020.Axle around described each tooth 1024b is wound with coil 1023 respectively.Described coil 1023 just can produce axial magnetic flux through overexcitation on tooth 1024b.The form that described coil 1023 forms on stator core 1024 so-called " concentrating winding ".Should " concentrate winding " be that coiling is simple and can reduce the winding mode of copper use amount.

As shown in figure 21, described tooth 1024b and coil 1023 have 6 respectively, and stator 1021 is 4 utmost points.In other words, can think that this stator 1021 is equivalent to concentrate winding 4 utmost points 6 grooves.In addition, coil 1023 for example upwards is being configured to U phase, V phase, W phase, U phase, V phase, W phase week, and per 3 are the star line mutually, from the converter supplying electric current.Here, tooth 1024b is made of compressed-core, be embedded under the state among the recess 1024c with a part (embedding part 1100) and fix tooth 1024b, this recess 1024c be arranged on with axle 1020 back of the body yoke 1024a that roughly electromagnetic steel plate of quadrature is laminated vertically on.Therefore, tooth 1024b is outstanding independently respectively, but links to each other by back of the body yoke 1024a.The fixed form of described tooth 1024b, available be pressed into or bonding etc.Adopt for example dust core as compressed-core.In addition, electromagnetic steel plate is known as so-called silicon steel plate, but in addition, also can use thin plates such as non-crystalline type, permalloy.These can characteristic as required be selected.In addition, back of the body yoke also may not be stacked thin plate.But, under the situation of laminated thin plate, the edge part that is difficult in the hole of inserting for tooth is provided with radius (part of circle processing), and particularly the serviceability of this structure is remarkable.

In addition, the degree of depth of the recess 1024c of back of the body yoke 1024a is preferably in magnetic flux has the scope of axial component.For example, if the magnetic flux density of back of the body yoke 104a almost near the zone of saturation, is the degree that equates with regard to the degree of depth of preferred recess 1024c and the thickness of back of the body yoke 1024a, perhaps preferred tooth 1024b perforation back of the body yoke 1024a.In general, the degree of depth of recess 1024c must carried on the back the over half of yoke 1024a thickness.Like this, because magnetic flux arrives after the fully dark degree of depth by compressed-core, magnetic flux also spreads all over the back of the body yoke 1024a that is made of stacked steel plate, so can reduce magnetic resistance, iron loss is diminished.In addition, by the magnetic flux of back of the body yoke 1024a, be included in magnetic flux that flows among this tooth 1024b and the magnetic flux that passes through this tooth 1024b and in adjacent tooth 1024b, flow.The back of the body yoke 1024a of the latter by constituting by stacked steel plate.In addition, when tooth is inserted back of the body yoke, in the part that tooth is embedded in, as for itself and the gap of carrying on the back between the yoke, but be set to the degree of absorption errors in the axial direction or be set to the gap of the degree of adhesive-applying, thereby can improve the precision in gap.In addition, can also be to be pressed into relation between the side of tooth and the back of the body yoke.

As shown in figure 20, described rotor 101 have be installed in axle on 1020 circular back of the body yoke 1034 and be arranged on permanent magnet 1033 on the face of stator 1021 sides of this back of the body yoke 1034, in addition, the internal diameter of the back of the body yoke 1024a of described stator core 1024 greatly to and axle 1020 discontiguous degree, perhaps also can be arranged to as shown in figure 20 on the inner-diameter portion whose of back of the body yoke 1024a, bearing can be set.

The back of the body yoke 134 of described rotor 1031 is made of magnetic.Described permanent magnet 1033 axle 1020 circumferentially on alternately have different magnetic poles, produce the magnetic flux on the direction of axle 1020.

As shown in figure 22, imbed the embedding part 1100 of the tooth 1024b in the back of the body yoke 1024a, form than other parts of fine the location in the time of can realizing inserting with this.Thereby improved the precision of air gap.

Here, the degree of depth of imbedding back of the body yoke 1024a of tooth 1024b is compared with the length of the taper portion of tooth 1024b, lack.Like this, on this part, be folded with the 1st insulant 1051 with back of the body yoke 1024a and coil 1023 insulation.That is the amount of the tooth 1024b thickness that buries the 1st insulant 1051 shallow.Here, the 1st insulant 1051 is the dielectric films that are provided with hole 1051a, and this hole 1051a is set to bigger than the cross section of imbedding the various piece in the back of the body yoke 1204a of a plurality of tooth 1024b, and than the little shape in cross section of not imbedding other parts in the back of the body yoke 1024a.In Figure 22, though the 1st insulant 1051 relatively each tooth 1024b independently be provided with, the amount that can also be whole teeth is the film of one.

Described tooth 1024b imbeds part among the back of the body yoke 1024a and the stage portion between other parts, considers the aspect that concerns of mould, processing, is difficult to all make the angle of no radius.Particularly, how little tooth 1024b and back of the body yoke 1024a owing to have the gap that is related to the degree of being pressed into, no matter be radius therefore, can influence burial depth, and the precision of air gap is worsened.Therefore, utilize and absorb the radius of tooth 1024b as the gap between the hole of the dielectric film of the 1st insulant 1051.Can limit the gap between back of the body yoke and the coil by the thickness of this dielectric film, further improve the precision of air gap.In addition, though must insulate between tooth and the coil, so because form is the explanation of omitting arbitrarily form.About the object lesson that insulate between tooth and the coil, explanation hereinafter.

In addition, Figure 23 is the profile of the 1st variation of the motor of the above-mentioned execution mode B1 of expression, Figure 24 is the profile of the 2nd variation of the described motor of expression, Figure 25 is the profile of the 3rd variation of the described motor of expression, Figure 26 is the profile of the 4th variation of the described motor of expression, and Figure 27 is the profile of the 5th variation of the described motor of expression.

As shown in figure 23, be provided with the 1st insulant 1151, and be provided with the 2nd insulant 1152 tooth 1024b and coil 1023 insulation with back of the body yoke 1024a and coil 1023 insulation.Described the 2nd insulant 1152 is to be wound on other parts dielectric film on every side that not imbedding of a plurality of tooth 1024b carried on the back in the yoke 1204a.By means of this dielectric film, can be simply to insulating between tooth 1024b and the coil 1023.

In addition, shown in the 2nd variation of Figure 24, tooth 1124b also can connect back of the body yoke 1124a.At this moment the hole 1124c that is arranged on the back of the body yoke 1124a becomes through hole.

In addition, shown in the 3rd variation of Figure 25, in the gap of the 2nd insulant 1252 between back of the body yoke 1024a and tooth 1024b, make crooked laterally bend 1252a and the 1st insulant 1251 overlapping, in case of necessity can be bonding, deposited.

In addition, shown in the 4th variation of Figure 26, in the gap of the 2nd insulant 1262 between the back of the body yoke 1024a and tooth 1024b, make to the bend 1262a and the 1st insulant 1151 of gap inside bend overlapping, in case of necessity can be bonding, deposited.

In addition, also can the 2nd insulant and the 1st insulant is integrally formed by resin forming article.In this case, can reduce the component number purpose simultaneously, can assemble easily.

As shown in figure 26, be provided with the gap at the end side of imbedding the various piece in the recess 1024c in the back of the body yoke 1024a of a plurality of tooth 1024b with carrying on the back between the yoke 1024a, axially do not contacting with back of the body yoke 1024a at recess 1024c internal tooth 1024b, like this, can stop magnetic flux in back of the body yoke 1024a, to pass through vertically.Like this, can suppress the increase of iron loss effectively.In addition, back of the body yoke 1024a is under the situation that is used for the magnetic saturation zone, and the gap is the smaller the better, as long as it is just passable to imbed the magnetic bonding agent.The magnetic bonding agent is compared with electromagnetic steel plate or compressed-core, and permeability is much lower, still, with air specific permeability height mutually, has the magnetically saturated effect of mitigation.But, in recess, beyond the bottom, between tooth 1024b and back of the body yoke 1024a, the gap is not set.

In addition, shown in the 5th variation of Figure 27, a plurality of tooth 1324b of stator core 1324 have the wide width part 1324d that is arranged in the face of rotor 1031 (as shown in figure 20) side, also must be to insulate between wide width part 1324d and the coil 1323 (the 3rd insulant 1353).

At this moment, described the 2nd insulant 1352 be cover a plurality of tooth 1324b do not imbed other parts in the back of the body yoke 1324a around the 2nd resin forming article, and can be integrated with the 3rd resin forming article of the 3rd insulant 1353 that coil 1323 and wide width part 1324d are insulated.In this case, can reduce component number, and can assemble easily.

By on a plurality of tooth 1324b of described stator core 1324, with rotor 1031 opposed sides wide width part 1324d is being set, thereby can increasing and rotor 1031 opposed areas, can increase interlinkage flux.In addition, described wide width part 1324d also can be used as the efficient apparatus that prevents that coil 1323 from contacting with rotor 1031 (as shown in figure 20).In addition, if wide width part and tooth portion are one and with the compressed-core shaping, then be suitable.In addition, can the 2nd insulant and the 3rd insulant is integrally formed with resin forming article.Further, can the 1st insulant, the 2nd insulant and the 3rd insulant is integrally formed with resin forming article, still, in this case, it is complicated a little that the mould tool can become.

Below, narrate the assemble method of stator core 1324 of the 5th variation shown in Figure 27 of described motor.

Figure 28 is the figure of manufacture method that is used to illustrate the motor of above-mentioned the 5th variation, as shown in figure 28, makes and the face of the opposed side in the gap of tooth 1324b (wide width part 1324d) the datum level 1300a towards instrument 1300, and tooth 1324b is positioned on the instrument 1300.On described tooth 1324b, the 2nd insulant 1352 and the 3rd insulant 1353 are set.

Then, on the tooth 1324b that is positioned on the instrument 1300, the neat in advance coil 1323 of reeling of outer embedding ground configuration.At this moment, the insulation of coil 1323 and tooth 1324b and back of the body yoke 1324a realizes by the 2nd insulant 1352.In addition, for the insulation of tooth 1324b,, realizes the 1st insulant 1351 by being set with back of the body yoke 1324a.

In addition,, will carry on the back yoke 1324a and be positioned on the tooth 1324b from the top having disposed under the state of coil 1323 around tooth 1324b, the top of tooth 1324b is imbedded in the recess 1324c that carries on the back yoke 1324a after, will carry on the back yoke 1324a and engage with tooth 1324b.The upper surface of instrument 1300 is the high plane of precision.

At this moment, determine by the step and the 1st insulant 1351 that are arranged on the tooth 1324b though imbed the position,, be actually that the instrument used in the back of the body yoke determines by tooth portion is imbedded.The part of the machining accuracy error of parts is absorbed by the 1st insulant that is made of resin.

According to the manufacture method of above-mentioned motor, can easily assemble stator core 1321.In addition, the state coil configuration down of reeling with reservation shape in advance after carrying on the back on the yoke, even will carry on the back yoke and a plurality of indented joint, also can easily be assembled stator core.

In addition, owing to be that the plane with rotor 1031 opposite sides with described tooth 1324b is a benchmark, back of the body yoke 1324a and tooth 1324b are bonded together, so, the precision of air gap improved.

As Figure 29, as shown in figure 30, described wide width part 1324d and adjacent wide width part 1324d between, be provided with carrying out the certain space 1325 of magnetic insulation between the tooth 1324b.This space 1325 from the center of wide width part 1324d to radial outside with radial extension.By this structure, owing to increased and air gap 1041 opposed stator core areas, so, interlinkage flux can be increased.In addition, in adjacent wide width part 1324d, pivot is positioned at all side parts (region S 2 of Figure 29) and is positioned at outer circumferential side part (region S 1 of Figure 29) relatively can contact (or connection) each other slightly.In this case, before tooth 1324b being installed on the back of the body yoke 1324a, can limit tooth 1324b position relation each other.The area of preferred contact site is less, makes leakage field is limited in Min..

In addition, if not directly around tooth coiling coil, so can also be like this: the 1st insulant, the 2nd insulant being set, the 3rd insulant is set if necessary,, unloads the last volume core, insert tooth afterwards around insulant coiling coil around the volume core.This method is used for for example being difficult to use under the situation of instrument fixed teeth, perhaps applies strong tension force when the coiling coil, is wound under the inadequate situation of intensity on the tooth.

Figure 31 shows the one-sided example that is provided with the motor rotor of stator of present embodiment B1.Described rotor 1031 has permanent magnet 1033, so, when motor operation, owing to can improve the magnetic flux density of air gap 1041 (shown in Figure 20), so, can realize having used the height output and the high efficiency of the compressor of this motor.In addition, described permanent magnet 1033 not necessarily.

In addition, described rotor 1031 has the rotor plate 1035 that clips permanent magnet 1033 with back of the body yoke 1034.Described rotor plate 1035 is made of magnetic, is provided with carrying out the groove 1035a of magnetic insulation between the adjacent pole in the permanent magnet 1033.Described groove 1035a from the center of rotor plate 1035 towards radial outside with radial extension.Described groove 1035a only is arranged on the rotor plate 1035, and is not located on the back of the body yoke 1034.In addition, because demagnetizing field does not directly act on described permanent magnet 1033, so the demagnetization resistance has also increased.Further, use at described permanent magnet 1033 under the situation of sintering rare-earth class magnet etc., because the higher harmonic wave component of magnetic flux is difficult to arrive the inside of permanent magnet 1033, thus can be suppressed at the permanent magnet 1033 inner eddy current that produce, thus the rising that realization is reduced the loss and reduced temperature.In addition, described rotor plate 1035 neither be necessary.

Motor according to said structure, in tooth 1024b (1124b, 1324b), used the little compressed-core that the magnetic powder is fixed of eddy current loss, and by being pressed into or shrink fit keeps the back of the body yoke 1024a (1124a, 1324a) that is made of the stacked steel plate with sufficient intensity, therefore can't harm motor characteristic, can realize keeping the motor of stator core 1024 (1124,1324) by be pressed into or shrink fit etc.

In addition, because the interior various piece of yoke 1024a (1124a, 1324a) is carried on the back in imbedding of described a plurality of tooth 1024b (1124b, 1324b), than other parts of fine of imbedding in back of the body yoke 1024a (1124a, 1324a), so the precision of air gap has been improved in the location can realize inserting easily the time.

In addition, owing to can provide described stator 1021 and rotor 1031 opposed each faces to be and the axle 1020 axial gap type motor of plane orthogonal roughly,, realize miniaturization so can dwindle axial dimension.

In addition, owing to used rotor 1031 with permanent magnet 1033, thereby magnetic flux by the permanent magnet generation, can make the magnetic flux that contains a large amount of higher harmonics pass tooth 1024b (1124b, 1324b), but, because tooth 1024b (1124b, 1324b) has used the little compressed-core of eddy current loss, so, iron loss can further be reduced.

In addition, the peripheral part by the back of the body yoke 1024a (1124a, 1324a) that will constitute by stacked steel plate with sufficient intensity be pressed into or shrink fit to the inboard of housing 1010, can reliably back of the body yoke 1024a (1124a, 1324a) be remained on the housing 1010.

(execution mode B2)

Figure 32 is the sectional arrangement drawing of rotary compressor of hermetic type that is mounted with the motor of execution mode B2.The rotary compressor of present embodiment B2 uses the motor of execution mode B1.

Shown in figure 32, this rotary compressor comprises: be configured in as the motor 1002 in the closed container 1001 of an example of housing; And compression unit 1011, it is configured in the closed container 1001 and at motor 1002 downsides, is driven by this motor 1002.Here, so-called above-below direction is meant along the direction of the central shaft of closed container 1001, and no matter whether the relative horizontal plane of central shaft of closed container 1001 tilts.

Described motor 1002 is configured in the zone in the closed container 1001 of filling the high-pressure refrigerant of discharging from compression unit 1011.Particularly, in the closed container 1001 high-pressure area H, this rotary compressor is so-called high pressure arch form compressor.

Described motor 1002 has: stator 1021; Be configured in the rotor 1031 of these stator 1021 tops across air gap 1041; And axle 1020, it is fixed on this rotor 1031 and the revolving force of this rotor 1031 is delivered to compression unit 1011, and extends ground from this rotor 1031 and be provided with, and is kept by bearing.

In addition, described compression unit 1011 comprises: cylindrical main body portion 1012; And the upper head plate 1015 and the bottom plate 1016 that are installed in these main part 1012 upper and lower opening ends respectively.Described axle 1020 connects upper head plate 1015 and bottom plate 1016, enters the inside of main part 1012.

In the inside of described main part 1012, can dispose and be arranged on with revolving round the sun the chimeric roller 1013 of the crank-pin 1017 of axle on 1020, the revolution motion by this roller 1013 carries out compression.That is, between roller 1013 outer surfaces and main part 12 inner surfaces, form discharge chambe 1014.

Described closed container 1001 has at the suction pipe 1006 of discharge chambe 1014 openings of compression unit 1011 low-pressure sides and at the discharge pipe 1007 of motor 1002 upsides (downstream) opening.Described compression unit 1011 has the tap 1011a at motor 1002 side openings.

One distolateral rotation of described axle 1020 is supported on the bottom plate 1016 of compression unit 1011 freely, and the other end sideway swivel of described axle 1020 is supported on the stator 1021 freely.

Downside in described closed container 1001 is provided with the lubricating oil 1008 for axle 1020 bottoms dipping.Described lubricating oil 1008 rises to axle 1020 inside by means of the rotation of axle 1020, the sliding part of compression unit 1011 etc. is lubricated.

Below, the effect of described rotary compressor is described.

Cold-producing medium is supplied to the discharge chambe 1014 of compression unit 1011 from described suction pipe 1006,1002 drive compression portions 1011 come compressed refrigerant by motor.Compressed cold-producing medium is with lubricating oil, is discharged in the closed container 1001 from the tap 1011a of compression unit 1011, by motor 1002, after being transported, is discharged to the outside of closed container 1001 from discharge pipe 1007 in the H of high-pressure area.

At this moment, refrigerant passage (not shown) need be arranged on the back of the body yoke inside of rotor 1021.But position and shape are arbitrarily.

According to the rotary compressor of this execution mode B2, can be loaded in the bigger purposes aspect of output the axial gap type motor of difficulty is installed, can realize the rotary compressor of miniaturization, high efficiency (realizing) by reducing copper loss.

In above-mentioned execution mode B2, though the rotary compressor that has used the axial gap type motor is illustrated, be not limited to rotary compressor, the present invention also is suitable for other compressors such as scroll compressor.

In addition, in above-mentioned execution mode B2, though utilize motor 1002 to drive as the compression unit 1011 that is driven portion, but, being not limited to compression unit by the electric motor driven portion of being driven of the present invention, can also be to utilize the main axis rotation of motor and the portion that is driven of driven other structures.

In addition,, make cylinder be close to the air gap opposite one side, utilize rotor and cylinder to constitute discharge chambe with rotor if rotary compressor then can be that rotor itself is provided with moveable piston.At this moment, between rotor and compression mechanical part, do not need to be provided with axle.Further, fixed axis is extended from stator to rotor one side,, then do not need the axle that rotates with rotor is set, can prevent the vibration that reversing between rotor and the compression mechanical part causes if bearing is arranged between fixed axis and the rotor.Therefore, in this case, axle not necessarily.

(execution mode B3)

Figure 33 represents the profile of major part of the motor of embodiments of the present invention B3.

As shown in figure 33, the motor of present embodiment B3 has rotor 1431 that is installed on the axle 1420 and two stators 1421 that are configured in these rotor 1431 axial both sides.Described rotor 1431 is that the center is rotated with the axis as the axle 1420 of being scheduled to rotating shaft.Described stator 1421 uses the stator shown in Figure 20 1021 of execution mode B1.Described rotor 1431 has two rotor plates 1435 and is configured in permanent magnet 1433 between these two rotor plates 1435.

Be provided with the 1st insulant 1451 with back of the body yoke 1424 and coil 1423 insulation.

Though the formation of the stator 1421 of the motor of above-mentioned execution mode B3 is identical with execution mode B1, owing to inject back of the body yoke 1424 in two positions spaced apart of housing 1410 inside, so have the effect of the rigidity that can improve housing 1410.In addition, in the motor of this execution mode B3, from the attraction force acts of the stator 1421 of axial both sides in rotor 1431, therefore, but the thrust of negative function on rotor 1431 and axle 1420 also can reduce on thrust direction the power of the bearing (not shown) of back shaft 1420 relatively.Further, concerning two groups of stators 1421 up and down, can utilize two faces of permanent magnet 1433, thereby can make the number of permanent magnet minimum.

In addition, rotor 1431 also can use the structure of back of the body yoke 1034 that substitutes the rotor 1031 of Figure 31 with rotor plate 1035.Show in the both sides of described rotor 1431 present magnetic pole, this rotor 1431 is the situation of 4 utmost points.In addition, back of the body yoke 1434 not necessarily also can omit back of the body yoke, thereby permanent magnet 1433 can utilize the two sides of one deck permanent magnet as magnetic pole.

In addition, in the motor of above-mentioned execution mode B1, B3, the spiral mode is not limited to concentrate winding, distributed winding, wavy winding etc., can freely select.In addition, the combination of stator tooth number and rotor number of poles and ratio can freely be selected.

(execution mode C1)

Below, the manufacture method of the armature core of execution mode C1 is described.

The overall structure of the axial gap type motor 2010 that this armature core is used at first, is described.Figure 34 is the profile of expression axial gap type motor, and Figure 35 is the exploded perspective view of expression armature core and coil.

This axial gap type motor 2010 produces around the revolving force of predetermined rotation 2018a, has as the rotor 2020 of excitation element and stator 2030 as armature.

Described stator 2030 has the roughly global shape of disc-shape, is fixed on the certain position that omits in the illustrated housing.

Rotor 2020 also has the roughly global shape of disc-shape, is provided in a side (being upper surface side) of a face of described stator 2030 here across the gap.This rotor 2020 is fastened on the axle 2018, the bearing 2031 of this 2018 perforation stator 2030, and (being the below here) extends to foreign side, owes slightly freely supporting by above-mentioned bearing 2031 grades.Therefore, stator 2030 is that the center is rotated support freely with the rotation 2018a as axle 2018 central axis.In other words, described motor 2010 is axial gap type motor 2010, promptly, opposed with the stator 2030 devices spaced apart ground on rotation 2018a direction as armature as the rotor 20 of excitation element 20.

Described stator 2030 has as the stator core 2032 of armature core and is installed in a plurality of coils 2040 on this stator core 2032.This stator 2030 is making each tooth 2036 described later under the posture of described rotor 2020, and is opposed across gap and this rotor 2020.

Stator core 2032 has: the roughly back of the body yoke 2034 of disc-shape and a plurality of tooth 2036.

Back of the body yoke 2034 by means of with the rotation 2018a stacked steel plate that is laminated along rotation 2018a direction of the thin plates such as the upwardly extending electromagnetic steel plate in side of quadrature roughly, form roughly disc-shape.Stacked thin plate is the thin plate that is formed by magnetic materials such as for example silicon steel plate or other non-crystalline types, permalloys.This back of the body yoke 2034 have with an interarea of rotation 2018a approximate vertical (in Figure 34, being upper surface) and be in an opposite side with this interarea and with another interarea (being lower surface in Figure 34) of rotation 2018a approximate vertical.In addition, this carries on the back yoke 2034, is fixed in the housing by be pressed into or shrink fit etc.Owing to form back of the body yoke 2034 by stacked steel plate, thus damage can be prevented to back of the body yoke 2034, and can under sufficient intensity, will carry on the back yoke 2034 and be fixed in the housing.

In addition, in the substantial middle portion of back of the body yoke 2034, be provided with the bearing 2031 of back shaft 2018.In addition, the position of bearing and be defined in this.

Each tooth 2036 is circular and sets around rotation 2018a, and from back of the body yoke 2034 outstanding with interareas rotor 2020 opposite sides.Each tooth 2036 is outstanding along rotation 2018a direction towards rotor-side from an interarea of back of the body yoke 2034, and coil 2040 is reeled around this ledge.In other words, here, on each tooth 2036, concentrate and be wound with coil 2040.In addition, between each coil 2040 and each tooth 2036, in fact be provided with the insulant of dielectric film etc., but omit explanation in the following description.

More specifically, each tooth 2036 has 6, amounts to 6 coils 2040 and concentrates coiling respectively.Each coil 2040 follow the usual practice as stator 30 circumferentially with the reiteration configuration of U phase, V phase, W phase, and this 3 phase coil 2040 is the star line respectively, from the converter supplying electric current.Therefore, each coil 2040 is through overexcitation, just can produce the magnetic flux on the projected direction of tooth 2036, makes described rotor 2020 rotations.

In addition, the fixed compressed-core of each tooth 2036 usefulness magnetic powder forms, and preferably forms with dust core.This tooth 2036 roughly has such cross sectional shape part on the plane orthogonal with rotation 2018a, and this cross sectional shape part is by two limits of the limit almost parallel of the cross section part of the tooth of establishing with the neighbour 2036 and surround on the limit that the outer circumferential side of back of the body yoke 2034 connects together the limit of these two almost parallels.Here, the limit of outer circumferential side is an arcuation, and therefore, this cross sectional shape of tooth 2036 is the cross sectional shape of central angle towards the roughly fan shape of rotation 2018a.Certainly, the limit that can also be outer circumferential side is a linearity, and this cross sectional shape of this tooth 2036 has triangle roughly.

In addition, the bight of the part of the coiling coil 2040 in each tooth 2036 is done circular.Therefore, can avoid this bight damaged, prevent that coil 40 from rolling up too slightly.Particularly, coil 2040 being wound under the situation of the concentrated winding on each tooth 2036, is effective.Describedly do circular corner radius preferably more than the twice of winding line astragal diameter.Experimentally, if adopt the radius of such degree, can prevent to roll up too slightly effectively.

In addition, the part that is wound with coil in each tooth 2036 can also have other shapes such as general square shape cross sectional shape.Certainly, by the part that is wound with coil in each tooth 2036 is made roughly fan-shaped or general triangular, can be with high occupation efficiency configuration tooth 2036 and coil 2040 both sides.In this case, the part corresponding with the winding part of coil 2040 can be described roughly fan-shaped or general triangular cross sectional shape part, for example, imbed in the back of the body yoke 2034 part or with rotor 2020 opposed parts etc., can also adopt other cross sectional shapes.

In addition, on the terminal part of each tooth 2036, also can be provided with outstanding flange part towards foreign side.Flange part can adopt the structure integrally formed with each tooth 2036, or is arranged on the structure on each tooth 2036 afterwards.Particularly, with the execution mode C2 explanation manufacture method that structure was suitable for that flange part and each tooth 2036 is integrally formed.

Rotor 2020 has the lip-deep permanent magnet 2024 that is installed in the circular rotor-side back of the body yoke 2022 on the axle 2018 and is arranged on stator 2030 sides of this rotor-side back of the body yoke 2022.In addition, stator 2030 sides at a plurality of permanent magnets 2024 are provided with the rotor magnetic 2026 as excitation component side magnetic parts.

Rotor-side back of the body yoke 2022 is formed by magnetics such as stacked steel plate magnetic core or compressed-cores.This rotor-side back of the body yoke 2022 fixing each tooth 2036 that keep, and with stator 2030 opposite sides, help the demagnetization of permanent magnet 2024 or the reduction of eddy current loss.

In addition, on the face of stator 2030 sides of rotor-side back of the body yoke 2022, permanent magnet 2024 equally spaced sets around rotation 2018a in the form of a ring.In addition, each permanent magnet 2024 sets to presenting and replace different magnetic poles around rotation 2018a, produces the magnetic flux on the rotation 2018a direction respectively.

Rotor magnetic 2026 forms the plate shape than stator 2030 side end faces of permanent magnet 2024 big (a big circle) here, and is installed in being positioned on stator 2030 side end faces of each permanent magnet 2024.This rotor magnetic 2026 is cut apart by magnetic across groove etc. between each permanent magnet 2024.Rotor magnetic 2026 has and makes magnetic flux to leak few mode by the function between each tooth 2036 and the rotor 2020.Certainly, this rotor magnetic 2026 also can omit.Rotor magnetic 2026 is preferably kept off axle.This be for the magnetic flux that prevents permanent magnet 2024 through i.e. axle and the short circuit of magnetic.At axle is under the situation of nonmagnetic material, does not just have such restriction.

In addition, as the excitation element, the preferred rotor 2020 that uses with permanent magnet 2024.This be since with compare with the situation of spiral excitation, can improve the magnetic flux density of stator core 2032 grades by permanent magnet 2024.In addition, in magnetic circuit, exist the permanent magnet 2024 enough bigger than thickness with the gap appearance, so, the magnetic resistance of permanent magnet 2024 occupies the major part of whole magnetic resistance of magnetic circuit, the influence by the permeability compressed-core formed tooth 2036 lower than stacked steel plate can be reduced to lesser extent.

The manufacture method of stator core 2032 is described.Figure 36 is the process chart of this manufacture method of expression.This manufacture method has back of the body yoke and forms operation (operation (a)) and tooth formation operation (operation (b)).

Form in the operation at back of the body yoke, the thin plate that utilization will strike out reservation shape forms back of the body yoke 2034 along the stacked steel plate that the direction of rotation 2018a is laminated.On this back of the body yoke 2034, form the fixing recess 2034h that uses of a plurality of teeth.Each tooth fixing with recess 2034h in the position that should fix each tooth 2036, promptly carry on the back an interarea side of yoke 2034, center on the interval that rotation 2018a separates about equally and form a plurality of.Here, each tooth is fixing use recess 2034h, is the recess of the roughly fan-shaped or general triangular corresponding with coil winding part in the tooth 2036, and form do not connect carry on the back yoke 2034 bottom outlet shape arranged.

In tooth forms operation, be fixed under the state in the shaping dies that tooth 2036 moulding use will carry on the back yoke 2034 insertions, with mould compressed-core is configured as tooth 2036.For example, as shown in figure 37, come under the situation of formed tooth 2036, will carry on the back yoke 2034 and be provided in advance in the 1st mould 2050 and the 2nd mould 2052, and be fixed in the 2nd mould 2052 with the 1st mould 2050 and the 2nd mould 2052.Under this state, the compressed-core material is provided between the fixing die face with recess 2034h and the 1st mould 2050 of tooth, to exerting pressure between two moulds 2050,2052, tooth is fixing to be given prominence to fixing with recess 2034h in the recess 2034h and from this tooth for it is in tooth 2036 compression formings.Therefore, it is fixing with recess 2034h becoming one partly with the tooth of back of the body yoke 2034 to be tooth 2036 with the compressed-core die forming.In other words, when consideration is benchmark with tooth 2036, also the fixing inner peripheral surface with recess 2034h of tooth is carried out die forming as die face, integrally formed with back of the body yoke 2034.Like this, utilize a kind of insertion to be shaped, produce stator core 2032.

In addition, also can in the die face of fixing recess 2034h of using of tooth and the 1st mould 2050, push the compressed-core material, come formed tooth 2036.

In addition, afterwards, on each tooth 2036, reel coil 2040 is installed.Coil 2040 can directly be wound on each tooth 2036, or after other places were wound on the spool, outer embedding was installed on each tooth 2036.Particularly, do not forming on the tooth 2036 under the situation of flange part, can be after other places be wound on the spool, outer embedding is installed on each tooth 2036.For being applicable to coil 2040 directly is wound on manufacture method on each tooth 2036, with execution mode C2 explanation.Here, also can be under the state that coil 2040 and back of the body yoke 2034 is fixed on simultaneously in the mould, with the compression molding of compressed-core material.

When adopting the manufacture method of such stator core 2032 and stator core 2032, owing to utilize stacked steel plate to form back of the body yoke 2034, so can stator core 2032 be remained in the housing by shrink fit or be pressed into etc., can guarantee that stator core 2032 has enough intensity.In addition, because the little compressed-core formation of tooth 2036 usefulness eddy current losses, thereby motor characteristic is optimized.In addition, owing to form and have the fixing back of the body yoke 2034 of tooth with recess 2034h, be fixed under the state in the mould 2050,2052 will carrying on the back yoke 2034, come die forming tooth 2036 with compressed-core, so can prevent the breakage of tooth 36, and can eliminate tooth 2036 and the gap of carrying on the back yoke 2034, securely it is kept.

In addition, tooth 2036 is pressed into or the method for shrink fit in the back of the body yoke 2034, might stress residual and cause that the magnetism characteristic reduces still in this manufacture method, is not easy to produce so stress-retained, can prevent the reduction of magnetic properties effectively.In addition, because the lamination surface of stacked steel plate is exposed in tooth is fixed with recess 2034h, so tooth 2036 can form in the gap that enters this lamination surface with filling, can guarantee the insulating properties between the layer more up hill and dale, and can prevent more reliably that also tooth 2036 from extracting with recess 2034h from tooth is fixing.

Figure 38 is the fixing profile of using the 1st variation of recess of tooth of expression execution mode C1.As shown in the drawing, tooth is fixing can also to be the hole shape that connects back of the body yoke 2034 with recess 2034Bh.In other words, tooth is fixing comprises with recess: the fixing fixing recess 2034Bh that uses of tooth that carries on the back the hole shape of yoke 2034 with recess 2034h and perforation of the tooth that the bottom outlet shape is arranged of non-through back of the body yoke 2034.

Figure 39 is the fixing profile of using the 2nd variation of recess of tooth of expression execution mode C1, and Figure 40 is that the tooth of expression execution mode C1 is fixed the profile with the 3rd variation of recess.

In these variation, in fixing with recess 2034Ch, 2034Dh, tooth is formed with jog.

In example shown in Figure 39, fixing the forming with recess 2034Ch of this tooth connects the hole shape of carrying on the back yoke 2034, and the inner circumferential surface shape forms at another interarea side of this back of the body yoke 2034 concaveconvex shape via stage portion 2034Cha hole enlargement.In addition, stage portion 2034Cha becomes the bearing surface of the direction opposite with the projected direction of tooth 2036, bears the power towards the projected direction of tooth 2036.

In addition, in example shown in Figure 40, fixing the forming with recess 2034Dh of tooth connects the hole shape of carrying on the back yoke 2034, and the inner circumferential surface shape makes to be had in the thickness direction shape of pars intermedia side-prominent flange shape protuberance 2034Dha in it roughly.The bearing surface 2034Dhb that becomes the direction opposite with the projected direction of tooth 36 among this flange shape protuberance 2034Dha bears the power towards the projected direction of tooth 2036.

In these variation, owing in tooth is fixed with recess 2034Ch, 2034Dh, form jog, so can prevent extracting of tooth 2036 effectively.In addition, certainly, described jog shape is not limited to above-mentioned example, can also be for example fixing with upwards outstanding shape of the whole week of recess 2034Ch, 2034Dh at tooth, or, in addition, also can adopt to be shape spherical, that prism-shaped is outstanding along circumferential local outstanding shape.

In addition, have bearing surface 2034Cha, the 2034Dhb of the direction opposite with recess 2034Ch, 2034Dh,, more effectively prevent extracting of tooth 2036 so can bear power towards tooth 2036 projected directions with the projected direction of tooth 2036 because each tooth is fixing.Particularly, owing to,,, prevent extracting of tooth 2036 so can bear this power effectively to the power of tooth 2036 effects towards its projected direction by means of the attraction of the permanent magnet 2024 of rotor 2020.

Figure 41 is the figure of the variation of the relevant coil winding method of expression.That is to say that coil 2040 not necessarily leaves no choice but concentrate to reel, as shown in figure 41, also can have the coil 2040E that distributes and reel, can also have the coil of other wavy coilings certainly.Under the situation of the coil 2040E that distribution is reeled, a plurality of coil 2040E are installed multilayer along rotation 2018a direction, but, preferably each coil 2040E is set by suitable bending etc., make to be provided in same one deck between each tooth 2036, promptly be provided on the roughly same plane on the rotation 2018a direction between each tooth 2036.

Figure 42 is the variation that sets stator in the rotor both sides of expression execution mode C1.In this variation, rotor 2020F has omitted rotor-side back of the body yoke 2022, is equipped with rotor magnetic 2026 in its both sides, and rotor 2020F presents the magnetic pole that replaces around rotation 2018a in its two sides side.Rotor 2020F with rotor magnetic 2026 across the liner of nonmagnetic material or retainer and combine with axle.At axle is under the situation of nonmagnetic material, also axle can be inserted in interior week of rotor magnetic 2026 to keep.In addition, two stator 2030F are identical with above-mentioned stator shown in Figure 38 2030 up and down, and two stator 2030F are fixed each tooth 2036 under the posture of rotor 2020 sides.Other structures are structures roughly the same with said structure.

According to this variation, the attraction that magnet acts on the rotor 2020 can be eliminated by the gap of both sides, can reduce the loss at bearing 2031 places, and prolong the life-span of bearing 2031.

Figure 43 is the variation that sets rotor in the stator both sides of expression execution mode C1.In this variation, stator core 2032G side-prominently constitutes at two of back of the body yoke 2034G by making tooth 2036G.This tooth 2036G adopts the method identical with the manufacture method of described tooth 2036, and is integrally formed with back of the body yoke 2034.In addition, with the opposed mode of each tooth 2036G that is projected into these stator 2030 both sides, rotation sets the rotor 2020G with described rotor 2020 same structures freely.That is, on another interarea of an opposite side of an interarea in back of the body yoke 2034 tooth 2036G is set also.Terminal part at each tooth 2036G of these both sides is formed with flange part 2036Ga.

In this case, also can utilize in two gaps and eliminate magnetic attracting force, can reduce loss, and prolong the life-span of bearing 2031 at bearing 2031 places.

In addition, in the both sides of stator 2030G, the coiling form of the position of tooth 2036G or coil 2040 is not necessarily identical.For example, also can circumferentially be staggered along back of the body yoke 2034 in the position of tooth 2036G in the both sides of stator 2030G.Therefore, can obtain asymmetric effect.

(execution mode C2)

Below, the manufacture method of the armature core of execution mode C2 is described.Figure 44 is the stereogram as the stator core of armature core of expression present embodiment, and Figure 45, Figure 46, Figure 47 are the figure of expression manufacturing process, and Figure 48 is the process chart of this manufacture method of expression.In addition, with the same component part of above-mentioned execution mode C1, indicate identical symbol, and omitted explanation it.

In this manufacturing process, form in the operation (a) at described back of the body yoke, as shown in figure 45, formed with each tooth 2136 is cut apart accordingly and cut apart back of the body yoke 2135 (cut apart back of the body yoke and form operation).Here, respectively cut apart back of the body yoke 2135 and form, with described back of the body yoke 2034 with the central angle (n is the number of teeth) of central angle (360/n) ° cut apart roughly fan-shaped, and form the fixing recess 2134h that uses of tooth respectively thereon.In addition, respectively cutting apart on the composition surface of carrying on the back yoke 2135 protuberance 2135a and recess 2135b that formation can be chimeric mutually.Forming roughly here,, the protuberance 2135a of semicircle convex reaches the roughly recess 2135b of semicircle concavity.

In addition, above-mentioned tooth subsequently forms in the operation (b), is fixed under the state in the shaping dies, as shown in figure 46 will respectively cutting apart back of the body yoke 2135, it is fixing with in the recess 2134h and from the fixing mode of giving prominence to recess 2034h of this tooth to be in each tooth with tooth, comes die forming tooth 2136 with compressed-core.At the terminal part of each tooth 2136, form flange part 2136a here.

Afterwards, as shown in figure 47, package coil 2040 on each tooth 2136.At this moment, while allow tooth 2136 rotate the coil 2040 of reeling, perhaps make the coil spiral supply with mouth and rotate the coil 2040 of reeling around tooth 2136.In a word, owing to each tooth 2136 is all cut apart, so be easy to carry out the coiling of such coil 2040.In addition, for example also can be under the situation of not integrally formed flange part 2136a, will respectively cut apart back of the body yoke 2135 integrated after, coil 2040 reeled to be installed on each tooth 2136.

Afterwards, in the back of the body integrated operation of yoke (c), will cut apart respectively that back of the body yoke 2135 engages and integrated, form the back of the body yoke 2134 same, produce stator core 2132 like this with back of the body yoke 2034 with bonding agent etc.At this moment,, can form correct position relation by described protuberance 2135a and recess 2135b is chimeric each other, and can be integrated securely.In addition, also can not use bonding agent, put ring, or directly remain on the housing internal diameter in periphery, also can be integrated with this with respectively cutting apart back of the body yoke 2135.

When adopting the manufacture method of such stator core 2132, be fixed under the state in the shaping dies will respectively cutting apart back of the body yoke 2135, it is fixing with in the recess 2134h and from the fixing mode of giving prominence to recess 2034h of this tooth to be in tooth with tooth, come die forming tooth 2136 with compressed-core, therefore, as shaping dies, can use the shaping dies littler than the situation of above-mentioned execution mode C1, in addition, also handle easily.

In addition, because in divided cutting apart on the back of the body yoke 2135 tooth 2136 is carried out die forming, so, even for example form the structure of flange part 2136a at the terminal part of each tooth 2136, will respectively cut apart back of the body yoke 2135 integrated before, can be at each tooth 2136 package coil 2040 easily.

In addition, be provided with in the stator both sides under the situation (with reference to Figure 43) of rotor, as shown in figure 49, also can be the integrally formed tooth 2136B of standing shape in the two sides side of cutting apart back of the body yoke 2135B.In addition, available and above-mentioned same method manufacturing.

(execution mode C3)

Below, the compressor of execution mode C3 is described.Figure 50 is the profile that expression has the compressor of the axial gap type motor that comprises described stator core 2032.

This compressor 2080 is so-called high pressure arch form compressors, in the closed container 2082 as the roughly tubular of housing, is equipped with motor 2010 and compression mechanical part 2090.Be provided with oil storage portion 2083 in the bottom of closed container 2082.

The driving that compression mechanical part 2090 is subjected to described motor 2010 comes the cold-producing medium of supplying with from suction pipe 2091 is carried out compressed action, and will discharge from discharge pipe 2092 through the high-pressure refrigerant of overcompression.

Motor 2010 has the identical structure of structure that illustrates with reference to Figure 34 in described execution mode C1.This motor 2010 is by axle 2018 portions of drive compression mechanism 2090.

This motor 2010 is arranged among the high-pressure area H that is full of high-pressure refrigerant in the described closed container 2082, is arranged on the upside of compression mechanical part 2090 here.That is, this compressor 2080 is vertical states.

The structure that is provided with of motor 2010 is described.This motor 2010 is configured to make axle 2018 to be under the posture of the central shaft of closed container 2082.In addition, stator 2030 is provided near compression mechanical part 2090 sides, and rotor 2020 is provided in away from compression mechanical part 2090 sides.By stator core 2032 is pressed into or shrink fit in the closed container 2082, stator 2030 can be fixed in the closed container 2082.In addition, the terminal part at each tooth 2036 of stator 2030 is provided with flange part 2036a.

In addition, the axle 2018 that is connected with rotor 2020, perforation stator 2030 also is connected on the compression mechanical part 2090.In addition, rotatablely moving of rotor 2020 passed to compression mechanical part 2090 by axle 2018.

In this compressor 2080, by being fixed in the closed container 2082, keep stator 2030 thereby can fix with the stator core 2032 that stacked steel plate forms, the stator core 2032 that usable intensity is stronger firmly fixes stator 2030.Meanwhile, can dwindle the gap between tooth 2036 and the stator core 2032, form the little magnetic circuit of magnetic resistance.In addition, even thin form also can make magnetic loading, motor load all increase, so a kind of high efficiency compressor can be provided, be suitable for most requiring with the constant low moment of torsion of low speed turn round for a long time and require to economize can equipment in, air conditioner etc. for example.

In addition, in the respective embodiments described above, armature core can be to be applicable to rotor or any structure of stator.In addition, armature core is not only applicable to motor, also is applicable to generator.

In sum, the manufacture method and the armature core of the manufacture method of this motor and motor and compressor, armature core at length is illustrated, still, above-mentioned explanation only is an illustration under comprehensive situation, the present invention is not constituted qualification.Not by illustrative various deformation example, in not departing from the scope of the present invention, can be understood as and to be expected.

Claims (13)

1. the manufacture method of an armature core,

This armature core comprises:

Has the back of the body yoke of roughly disc-shape with the interarea of axle approximate vertical; And

With a plurality of teeth that set regularly around described axle from the outstanding mode of an interarea of described back of the body yoke,

The manufacture method of this armature core has following operation:

(a), along described axially stacked stacked steel plate, formation has the fixing operation of using the back of the body yoke of recess of tooth with thin plate in utilization; And

(b), under the state that described back of the body yoke is fixed in the shaping dies, fixing described tooth is in described tooth with in the recess and with compressed-core described tooth is carried out the operation of die forming from the fixing mode of giving prominence to of this tooth with recess.

2. the manufacture method of armature core according to claim 1,

In fixing with recess, described tooth forms jog.

3. the manufacture method of armature core according to claim 2,

Described jog has and the rightabout bearing surface of the projected direction of described tooth.

4. the manufacture method of armature core according to claim 1,

Described operation (a) is to form the operation of cutting apart according to a plurality of described teeth of carrying on the back yoke of cutting apart,

Described operation (b) is that the described back of the body yoke of respectively cutting apart is being fixed under the state in the shaping dies, and is fixing with in the recess and from the fixing mode of giving prominence to recess of this tooth described tooth is in described tooth, with compressed-core described tooth carried out the operation of die forming,

In described operation (b) afterwards, also comprise:

(c), make the described incorporate operation of back of the body yoke of respectively cutting apart.

5. the manufacture method of armature core according to claim 4,

At the terminal part of described tooth, be formed with outwards outstanding flange part.

6. the manufacture method of armature core according to claim 4,

Between described operation (b) and described operation (c), also be included in the operation of coiling coil on described each tooth.

7. the manufacture method of armature core according to claim 1,

In described back of the body yoke, with another interarea of a described opposite side of interarea on, be provided with tooth.

8. the manufacture method of armature core according to claim 1,

In described tooth, fillet is made in the bight of the part of coiling coil.

9. the manufacture method of armature core according to claim 8,

More than the twice of the diameter of the winding wire that the described corner radius of making fillet is reeled.

10. armature core,

This armature core comprises:

Has the back of the body yoke of roughly disc-shape with the interarea of axle approximate vertical; And

With the tooth that sets regularly around described axle from the outstanding mode of an interarea of described back of the body yoke,

Wherein, described back of the body yoke utilizes thin plate is formed along described axially stacked stacked steel plate, and has the fixing recess of using of tooth,

Described tooth is to fix the mode compressed-core die forming of using the recess sectoral integration with the described tooth of described back of the body yoke.

Images