WO2015196604A1 - 一种电机转子及应用该电机转子的塑封电机 - Google Patents

一种电机转子及应用该电机转子的塑封电机 Download PDF

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Publication number
WO2015196604A1
WO2015196604A1 PCT/CN2014/087353 CN2014087353W WO2015196604A1 WO 2015196604 A1 WO2015196604 A1 WO 2015196604A1 CN 2014087353 W CN2014087353 W CN 2014087353W WO 2015196604 A1 WO2015196604 A1 WO 2015196604A1
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Prior art keywords
rotor
rotor core
convex portion
ring
wall surface
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Ceased
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PCT/CN2014/087353
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English (en)
French (fr)
Inventor
金建伟
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Zhongshan Broad Ocean Motor Co Ltd
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Zhongshan Broad Ocean Motor Co Ltd
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Application filed by Zhongshan Broad Ocean Motor Co Ltd filed Critical Zhongshan Broad Ocean Motor Co Ltd
Publication of WO2015196604A1 publication Critical patent/WO2015196604A1/zh
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Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/28—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures
    • H02K1/30—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures using intermediate parts, e.g. spiders
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/27—Rotor cores with permanent magnets
    • H02K1/2706—Inner rotors
    • H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
    • H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
    • H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
    • H02K1/278—Surface mounted magnets; Inset magnets
    • H02K1/2781—Magnets shaped to vary the mechanical air gap between the magnets and the stator

Definitions

  • the utility model relates to a motor rotor and a plastic sealing motor thereof.
  • the existing motor damping rotor comprises an inner rotor core and an outer rotor core, and the outer rotor core sleeve is outside the inner rotor core and forms a gap between the outer rotor core and the inner rotor core, and the inner rotor core is outside a plurality of inner convex portions are protruded from the wall surface, and the inner wall surface of the outer rotor core protrudes from the plurality of outer convex portions, and the inner convex portion and the outer convex portion are oppositely arranged or spaced apart from each other, and are disposed between the outer rotor core and the inner rotor core
  • the rotor core is detached or broken, which seriously affects the normal operation of the motor, and the replacement of the rotor will increase the cost; 2) the insulator is easily misaligned with the inner rotor core or the outer rotor core, resulting in poor control of the rotor concentricity, affecting the rotor Operating efficiency.
  • the utility model aims to provide a motor rotor and a motor thereof, which has the advantages of simple structure, large structural strength, good concentricity control and shock absorption effect, high reliability, simple structure of the motor, large structural strength and concentricity. Degree control and shock absorption are good.
  • An electric machine rotor comprising an inner rotor core, an outer rotor core, a plurality of permanent magnets and an insulator
  • the inner rotor core comprises an inner ring and a plurality of convex portions extending circumferentially from the outer side wall of the inner ring
  • the rotor core comprises an outer ring and a plurality of inner protrusions extending circumferentially from the inner side wall of the outer ring
  • the outer ring sleeve is outside the inner ring and forms a cavity between the outer ring and the inner ring
  • the outer convex portions are arranged at intervals in the circumferential direction of the cavity
  • the plurality of permanent magnets are circumferentially spaced apart from the outer wall surface of the outer rotor core
  • the insulator is nested inside the cavity and wrapped around the outer convex portion and the inner convex portion
  • the utility model is characterized in that: a first gap is formed between two adjacent
  • the distance between the outer end surface of the outer convex portion and the inner wall surface of the outer ring is between 0.8 mm and 1.2 mm, and the distance between the outer end surface of the inner convex portion and the outer wall surface of the inner ring is between 0.8 mm and 1.2 mm.
  • the insulator is a shock absorbing rubber.
  • the above-mentioned outer convex portion includes a first end portion and a first root portion connected between the first end portion and the inner annular outer wall surface, the first end portion having a width larger than a width of the first root portion, the inner convex portion A second end portion and a second root portion connected between the second end portion and the inner wall surface of the outer annular ring, the second end portion having a width greater than a width of the second root portion.
  • the number of the outer convex portions and the inner convex portions described above is four.
  • the axial height of the outer rotor core described above is greater than the axial height of the inner rotor core, and the insulator is wrapped around the outer end surfaces of the outer rotor core and the inner rotor core.
  • the outer wall surface of the outer ring described above protrudes circumferentially from a plurality of bosses, and the permanent magnets are mounted on the outer wall surface of the outer ring between the adjacent two bosses by glue.
  • the permanent magnet described above has an inner arc surface and an outer arc surface.
  • the inner arc surface is centered on the center of the outer rotor core, and the outer arc surface is centered at a point deviated from the center of the outer rotor core.
  • a plastic-sealed motor includes a rotating shaft, a rotor assembly, a plastic-sealed stator and an end cover.
  • the rotor assembly is mounted on the rotating shaft, and the plastic-sealed stator is nested outside the rotor assembly.
  • the plastic-sealed stator includes a stator core, an end insulation, a coil winding, and a plastic-clad outer casing.
  • the end insulation is mounted on the end face of the stator core, the coil winding is wound around the end insulation, the plastic case is wrapped around the stator core, the end insulation and the coil winding, the end cover is mounted at the end of the plastic case, and the shaft is supported at The bearing on both ends of the cover is characterized in that the rotor assembly is the structure described in any one of claims 1 to 7.
  • the motor has a simple structure, so that the insulator nested between the adjacent two outer convex portions and the inner convex portion is not easy to rotate or break, the structural strength of the rotor is improved, the shock absorption effect is good, and the reliability is high;
  • the distance between the outer end surface of the outer convex portion and the inner wall surface of the outer ring is in the range of 0.8 mm to 1.2 mm.
  • the distance between the outer end surface of the convex portion and the outer wall surface of the inner ring is between 0.8 mm and 1.2 mm, which effectively ensures the connection strength between the inner rotor core and the outer rotor core, and has high reliability;
  • the outer convex portion includes a first end portion and a first root portion connected between the first end portion and the inner annular outer wall surface, the width of the first end portion being greater than the width of the first root portion, and the inner convex portion including the second end portion And a second root portion connected between the second end portion and the inner wall surface of the outer ring, the width of the second end portion being greater than the width of the second root portion, forming a trapezoid between the adjacent two outer convex portions and the inner convex portion.
  • the insulator is nested inside the cavity and wrapped around the outer convex portion and the inner convex portion, thereby effectively improving the structural strength of the rotor, and the concentricity control and shock absorption effect of the rotor are good, and the reliability is high;
  • the number of the outer convex portion and the inner convex portion are four, and the arrangement is reasonable, so that the inner rotor core and the outer rotor core are evenly stressed, and the shock absorbing effect of the rotor is improved;
  • the axial height of the outer rotor core is larger than the axial height of the inner rotor core, and the insulator is wrapped around the outer end surfaces of the outer rotor core and the inner rotor core, the structure is simple, the insulator is not easy to be detached or broken, and the structural strength of the rotor is improved. ;
  • the motor has a simple structure, large structural strength, good concentricity control and shock absorption effect.
  • Figure 1 is a perspective view of the shock absorbing rotor of the present invention
  • Figure 2 is an exploded view of the shock absorbing rotor of the present invention
  • Figure 3 is a front view of the shock absorbing rotor of the present invention.
  • Figure 4 is a cross-sectional view taken along line A-A of Figure 3;
  • Figure 5 is a plan view of the shock absorbing rotor of the present invention.
  • Figure 6 is a cross-sectional view taken along line B-B of Figure 5;
  • Figure 7 is a perspective view of the motor of the present invention.
  • Figure 8 is a plan view of the motor of the present invention.
  • Figure 9 is a plan view of the motor of the present invention.
  • Figure 10 is a cross-sectional view taken along line C-C of Figure 9;
  • Embodiment 1 As shown in FIG. 1 to FIG. 6 , the utility model relates to an electric machine rotor, which comprises an inner rotor core 1 , an outer rotor core 2 , a plurality of permanent magnets 3 and an insulator 4 , and the inner rotor core 1 includes an inner ring 11 and a plurality of outer protrusions 12 projecting circumferentially from an outer side wall of the inner ring 11, the outer rotor core 2 including an outer ring 21 and a plurality of inner protrusions extending circumferentially from the inner side wall of the outer ring 21.
  • the outer ring 21 is sleeved outside the inner ring 11 and forms a cavity 10 between the outer ring 21 and the inner ring 11, and the inner convex portion 22 and the outer convex portion 12 are alternately arranged in the circumferential direction of the cavity 10.
  • the outer protrusion 12 includes a first end portion 121 and a first root portion 122 connected between the first end portion 121 and an outer wall surface of the inner ring portion 11.
  • the width of the first end portion 121 is greater than the width of the first root portion 122.
  • the inner convex portion 22 includes a second end portion 221 and a second root portion 222 connected between the second end portion 221 and the inner wall surface of the outer circular ring 21, and the width of the second end portion 221 is greater than the width of the second root portion 222.
  • the number of the outer convex portion 12 and the inner convex portion 22 is four.
  • the axial height H1 of the outer rotor core 2 is larger than the axial height H2 of the inner rotor core 1, and the insulator 4 is wrapped around the outer end faces of the outer rotor core 2 and the inner rotor core 1.
  • the distance between the outer end surface of the outer convex portion 12 and the inner wall surface of the outer ring 21 is in the range of 0.8 mm to 1.2 mm, and the distance between the outer end surface of the inner convex portion 22 and the outer wall surface of the inner ring 11 is in the range of 0.8 mm to 1.2 mm.
  • a plurality of bosses 211 are circumferentially projected on the outer wall surface of the outer ring 21, and the permanent magnets 3 are attached to the outer wall surface of the outer ring 21 between the adjacent two bosses 211 by glue.
  • the permanent magnet 3 has an inner arc surface and an outer arc surface.
  • the inner arc surface is centered on the center O of the outer rotor core 2, and the outer arc surface is centered on a point A which is offset from the center O of the outer rotor core 2 by a certain distance.
  • the insulator is made of a shock absorbing rubber or other insulating material such as plastic.
  • Embodiment 2 As shown in FIG. 1 to FIG. 10, the utility model relates to a plastic-sealed motor, comprising a rotating shaft 5, a rotor assembly 6, a plastic-sealed stator 7 and an end cover 8.
  • the rotor assembly 6 is mounted on the rotating shaft 5, and the stator 7 is molded.
  • the molded stator 7 Nested outside the rotor assembly 6, the molded stator 7 includes a stator core 71, an end insulation 72, and a coil winding 73.
  • a molded case 74 the end insulation 72 is mounted on the end face of the stator core 71, and the coil winding 73 is wound around the end insulation 72, which is wrapped around the stator core 71, the end insulation 72 and the coil winding 73.
  • the end cap 8 is mounted at the end of the plastic casing 74, and the rotating shaft 5 is supported on the bearings of the end caps 8, the rotor assembly 6 including the inner rotor core 1, the outer rotor core 2, the plurality of permanent magnets 3, and the insulator 4
  • the inner rotor core 1 includes an inner ring 11 and a plurality of outer protrusions 12 projecting circumferentially from the outer side wall of the inner ring 11, the outer rotor core 2 including the outer ring 21 and the inner side wall of the outer ring 21 A plurality of inner convex portions 22 projecting upwardly, the outer ring 21 is sleeved outside the inner ring 11 and forms a cavity 10 between the outer ring 21 and the inner ring 11, and the inner convex portion 22 and the outer convex portion 12 are in the cavity
  • the inner circumferences of the outer rotor core 2 are circumferentially spaced apart from each other, and the permanent magnets 3 are circumferentially spaced apart on the outer wall surface of
  • the convex portion 12 includes a first end portion 121 and a first root portion 122 connected between the first end portion 121 and an outer wall surface of the inner ring portion 11.
  • the width of the first end portion 121 is greater than the width of the first root portion 122.
  • the inner convex portion 22 includes a second end portion 221 and a second root portion 222 connected between the second end portion 221 and the inner wall surface of the outer circular ring 21, and the width of the second end portion 221 is greater than the width of the second root portion 222.
  • the number of the outer convex portion 12 and the inner convex portion 22 is four.
  • the axial height H1 of the outer rotor core 2 is larger than the axial height H2 of the inner rotor core 1, and the insulator 4 is wrapped around the outer end faces of the outer rotor core 2 and the inner rotor core 1.
  • the distance between the outer end surface of the outer convex portion 12 and the inner wall surface of the outer ring 21 is in the range of 0.8 mm to 1.2 mm, and the distance between the outer end surface of the inner convex portion 22 and the outer wall surface of the inner ring 11 is in the range of 0.8 mm to 1.2 mm.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)
  • Permanent Field Magnets Of Synchronous Machinery (AREA)

Abstract

一种电机转子，包括内转子铁芯（1）、外转子铁芯（2）、若干永磁体（3）和绝缘体（4），所述的内转子铁芯（1）包括内圆环（11）和从内圆环（11）外侧壁上周向伸出的若干外凸部（12），外转子铁芯（2）包括外圆环（21）和从外圆环（21）内侧壁上周向伸出的若干内凸部（22），相邻的两个外凸部（12）之间形成第一间隙（13），相邻的两个内凸部（22）之间形成第二间隙（23），内凸部（22）伸入到第一间隙（13）里面，外凸部（12）伸入到第二间隙（23）里面，该电机转子结构简单，结构强度大，同心度控制和减震效果好，可靠性高。

Description

一种电机转子及其应用的塑封电机 技术领域：
本实用新型涉及一种电机转子及其应用的塑封电机。
背景技术：
现有的电机减震转子包括内转子铁芯和外转子铁芯，外转子铁芯套在内转子铁芯外面并在外转子铁芯和内转子铁芯之间形成空隙，内转子铁芯的外壁面伸出若干内凸部，外转子铁芯的内壁面伸出若干外凸部，内凸部和外凸部两两相对或者相互间隔排布，在外转子铁芯和内转子铁芯之间设置有绝缘体，但是这种结构的减震转子存在如下几个问题；1)经多次试验证明，这种结构的减震转子结构强度低，在电机运行过程中绝缘体容易与内转子铁芯、外转子铁芯之间脱离或者断裂，严重影响电机的正常运行，而且更换转子会增加成本；2)绝缘体容易与内转子铁芯或者外转子铁芯相互错位，造成转子的同心度控制差，影响转子的运行效率。
发明内容：
本实用新型的目的是提供一种电机转子及其应用的电机，该电机转子结构简单，结构强度大，同心度控制和减震效果好，可靠性高，该电机结构简单，结构强度大，同心度控制和减震效果好。
本实用新型的目的是通过下述技术方案予以实现的。
一种电机转子，包括内转子铁芯、外转子铁芯、若干永磁体和绝缘体，所述的内转子铁芯包括内圆环和从内圆环外侧壁上周向伸出的若干外凸部，外转子铁芯包括外圆环和从外圆环内侧壁上周向伸出的若干内凸部，外圆环套在内圆环外面并在外圆环和内圆环之间形成空腔，内凸部和外凸部在空腔里面周向相互交错间隔排布，若干永磁体周向间隔安装在外转子铁芯的外壁面上，绝缘体嵌套在空腔里面并包裹在外凸部和内凸部外面，其特征在于：相邻的两个外凸部之间形成第一间隙，相邻的两个内凸部之间形成第二间隙，内凸部伸入到第一间隙里面，外凸部伸入到第二间隙里面。
上述所述的外凸部外侧端面与外圆环内壁面的距离范围在0.8mm至1.2mm之间，内凸部外侧端面与内圆环外壁面的距离范围在0.8mm至1.2mm之间，所述的绝缘体是减震橡胶。
上述所述的外凸部包括第一端部和连接在第一端部和内圆环外壁面之间的第一根部，第一端部的宽度大于第一根部的宽度，所述内凸部包括第二端部和连接在第二端部和外圆环内壁面之间的第二根部，第二端部的宽度大于第二根部的宽度。
上述所述的外凸部和内凸部的数量都是4个。
上述所述的外转子铁芯的轴向高度大于内转子铁芯的轴向高度，绝缘体包裹在外转子铁芯和内转子铁芯的两端面外面。
上述所述的外圆环的外壁面上周向伸出有若干凸台，通过胶水把永磁体安装在相邻两个凸台之间的外圆环的外壁面上。
上述所述的永磁体具有内弧面和外弧面，内弧面是以外转子铁芯的中心为圆心的，外弧面是以偏离外转子铁芯中心一定距离的点为圆心的。
一种塑封电机，包括转轴、转子组件、塑封定子和端盖，转子组件安装在转轴上，塑封定子嵌套在转子组件外面，塑封定子包括定子铁芯、端部绝缘、线圈绕组和塑封外壳，端部绝缘安装在定子铁芯的端面上，线圈绕组卷绕在端部绝缘上，塑封外壳包裹在定子铁芯、端部绝缘和线圈绕组外面，端盖安装在塑封外壳端部，转轴支承在两端盖的轴承上，其特征在于：所述的转子组件是权利要求1至7任何一项所描述的结构。
本实用新型与现有技术相比，具有如下效果：
1)相邻的两个外凸部之间形成第一间隙，相邻的两个内凸部之间形成第二间隙，内凸部伸入到第一间隙里面，外凸部伸入到第二间隙里面，该电机结构简单，使嵌套在相邻两个外凸部和内凸部之间的绝缘体不易转动或者断裂，转子的结构强度得到提升，减震效果好，可靠性高；
2)外凸部外侧端面与外圆环内壁面的距离范围在0.8mm至1.2mm之间，内 凸部外侧端面与内圆环外壁面的距离范围在0.8mm至1.2mm之间，有效保证内转子铁芯和外转子铁芯之间的连接强度，可靠性高；
3)外凸部包括第一端部和连接在第一端部和内圆环外壁面之间的第一根部，第一端部的宽度大于第一根部的宽度，内凸部包括第二端部和连接在第二端部和外圆环内壁面之间的第二根部，第二端部的宽度大于第二根部的宽度，在相邻两个外凸部和内凸部之间形成梯形结构，绝缘体嵌套在空腔里面并包裹在外凸部和内凸部外面,有效提高转子的结构强度，同时转子的同心度控制和减震效果好，可靠性高；
4)外凸部和内凸部的数量都是4个，设置合理，使内转子铁芯和外转子铁芯的受力均匀，提高转子的减震效果；
5)外转子铁芯的轴向高度大于内转子铁芯的轴向高度，绝缘体包裹在外转子铁芯和内转子铁芯的两端面外面，结构简单，绝缘体不易脱离或者断裂，提高转子的结构强度；
6)该电机结构简单，结构强度大，同心度控制和减震效果好。
附图说明：
图1是本实用新型减震转子的立体图；
图2是本实用新型减震转子的分解图；
图3是本实用新型减震转子的前视图；
图4是图3中A-A剖视图；
图5是本实用新型减震转子的俯视图；
图6是图5中B-B剖视图；
图7是本实用新型电机的立体图；
图8是本实用新型电机的俯视图；
图9是本实用新型电机的俯视图；
图10是图9中C-C剖视图。
具体实施方式：
下面通过具体实施例并结合附图对本实用新型作进一步详细的描述。
实施例一：如图1至图6所示，本实用新型是一种电机转子，包括内转子铁芯1、外转子铁芯2、若干永磁体3和绝缘体4，所述的内转子铁芯1包括内圆环11和从内圆环11外侧壁上周向伸出的若干外凸部12，外转子铁芯2包括外圆环21和从外圆环21内侧壁上周向伸出的若干内凸部22，外圆环21套在内圆环11外面并在外圆环21和内圆环11之间形成空腔10，内凸部22和外凸部12在空腔10里面周向相互交错间隔排布，若干永磁体3周向间隔安装在外转子铁芯2的外壁面上，绝缘体4嵌套在空腔10里面并包裹在外凸部12和内凸部22外面，相邻的两个外凸部12之间形成第一间隙13，相邻的两个内凸部22之间形成第二间隙23，内凸部22伸入到第一间隙13里面，外凸部12伸入到第二间隙23里面。所述外凸部12包括第一端部121和连接在第一端部121和内圆环11外壁面之间的第一根部122，第一端部121的宽度大于第一根部122的宽度，所述内凸部22包括第二端部221和连接在第二端部221和外圆环21内壁面之间的第二根部222，第二端部221的宽度大于第二根部222的宽度。外凸部12和内凸部22的数量都是4个。外转子铁芯2的轴向高度H1大于内转子铁芯1的轴向高度H2，绝缘体4包裹在外转子铁芯2和内转子铁芯1的两端面外面。外凸部12外侧端面与外圆环21内壁面的距离范围在0.8mm至1.2mm之间，内凸部22外侧端面与内圆环11外壁面的距离范围在0.8mm至1.2mm之间。在外圆环21的外壁面上周向伸出有若干凸台211，通过胶水把永磁体3安装在相邻两个凸台211之间的外圆环21的外壁面上。永磁体3具有内弧面和外弧面，内弧面是以外转子铁芯2的中心O为圆心的，外弧面是以偏离外转子铁芯2中心O一定距离的点A为圆心的。所述的绝缘体是减震橡胶，也可是塑料等其他绝缘材料制成。
实施例二：如图1至图10所示，本实用新型是一种塑封电机，包括转轴5、转子组件6、塑封定子7和端盖8，转子组件6安装在转轴5上，塑封定子7嵌套在转子组件6外面，塑封定子7包括定子铁芯71、端部绝缘72、线圈绕组73 和塑封外壳74，端部绝缘72安装在定子铁芯71的端面上，线圈绕组73卷绕在端部绝缘72上，塑封外壳74包裹在定子铁芯71、端部绝缘72和线圈绕组73外面，端盖8安装在塑封外壳74端部，转轴5支承在两端盖8的轴承上，所述的转子组件6包括内转子铁芯1、外转子铁芯2、若干永磁体3和绝缘体4，所述的内转子铁芯1包括内圆环11和从内圆环11外侧壁上周向伸出的若干外凸部12，外转子铁芯2包括外圆环21和从外圆环21内侧壁上周向伸出的若干内凸部22，外圆环21套在内圆环11外面并在外圆环21和内圆环11之间形成空腔10，内凸部22和外凸部12在空腔10里面周向相互交错间隔排布，若干永磁体3周向间隔安装在外转子铁芯2的外壁面上，绝缘体4嵌套在空腔10里面并包裹在外凸部12和内凸部22外面，相邻的两个外凸部12之间形成第一间隙13，相邻的两个内凸部22之间形成第二间隙23，内凸部22伸入到第一间隙13里面，外凸部12伸入到第二间隙23里面。外凸部12包括第一端部121和连接在第一端部121和内圆环11外壁面之间的第一根部122，第一端部121的宽度大于第一根部122的宽度，所述内凸部22包括第二端部221和连接在第二端部221和外圆环21内壁面之间的第二根部222，第二端部221的宽度大于第二根部222的宽度。外凸部12和内凸部22的数量都是4个。外转子铁芯2的轴向高度H1大于内转子铁芯1的轴向高度H2，绝缘体4包裹在外转子铁芯2和内转子铁芯1的两端面外面。外凸部12外侧端面与外圆环21内壁面的距离范围在0.8mm至1.2mm之间，内凸部22外侧端面与内圆环11外壁面的距离范围在0.8mm至1.2mm之间。
以上实施例为本发明的较佳实施方式，但本发明的实施方式不限于此，其他任何未背离本发明的精神实质与原理下所作的改变、修饰、替代、组合、简化，均为等效的置换方式，都包含在本发明的保护范围之内。

Claims (8)

  1. 一种电机转子，包括内转子铁芯(1)、外转子铁芯(2)、若干永磁体(3)和绝缘体(4)，所述的内转子铁芯(1)包括内圆环(11)和从内圆环(11)外侧壁上周向伸出的若干外凸部(12)，外转子铁芯(2)包括外圆环(21)和从外圆环(21)内侧壁上周向伸出的若干内凸部(22)，外圆环(21)套在内圆环(11)外面并在外圆环(21)和内圆环(11)之间形成空腔(10)，内凸部(22)和外凸部(12)在空腔(10)里面周向相互交错间隔排布，若干永磁体(3)周向间隔安装在外转子铁芯(2)的外壁面上，绝缘体(4)嵌套在空腔(10)里面并包裹在外凸部(12)和内凸部(22)外面，其特征在于：相邻的两个外凸部(12)之间形成第一间隙(13)，相邻的两个内凸部(22)之间形成第二间隙(23)，内凸部(22)伸入到第一间隙(13)里面，外凸部(12)伸入到第二间隙(23)里面。
  2. 根据权利要求1所述的一种电机转子，其特征在于：外凸部(12)外侧端面与外圆环(21)内壁面的距离范围在0.8mm至1.2mm之间，内凸部(22)外侧端面与内圆环(11)外壁面的距离范围在0.8mm至1.2mm之间，所述的绝缘体(4)是减震橡胶。
  3. 根据权利要求1或2所述的一种电机转子，其特征在于：所述外凸部(12)包括第一端部(121)和连接在第一端部(121)和内圆环(11)外壁面之间的第一根部(122)，第一端部(121)的宽度大于第一根部(122)的宽度，所述内凸部(22)包括第二端部(221)和连接在第二端部(221)和外圆环(21)内壁面之间的第二根部(222)，第二端部(221)的宽度大于第二根部(222)的宽度。
  4. 根据权利要求3所述的一种电机转子，其特征在于：所述外凸部(12)和内凸部(22)的数量都是4个。
  5. 根据权利要求1或2所述的一种电机转子，其特征在于：外转子铁芯(2)的轴向高度(H1)大于内转子铁芯(1)的轴向高度(H2)，绝缘体(4)包裹在 外转子铁芯(2)和内转子铁芯(1)的两端面外面。
  6. 根据权利要求1或2所述的一种电机转子，其特征在于：在外圆环(21)的外壁面上周向伸出有若干凸台(211)，通过胶水把永磁体(3)安装在相邻两个凸台(211)之间的外圆环(21)的外壁面上。
  7. 根据权利要求6所述的一种电机转子，其特征在于：永磁体(3)具有内弧面和外弧面，内弧面是以外转子铁芯(2)的中心(O)为圆心的，外弧面是以偏离外转子铁芯(2)中心(O)一定距离的点(A)为圆心的。
  8. 一种塑封电机，包括转轴(5)、转子组件(6)、塑封定子(7)和端盖(8)，转子组件(6)安装在转轴(5)上，塑封定子(7)嵌套在转子组件(6)外面，塑封定子(7)包括定子铁芯(71)、端部绝缘(72)、线圈绕组(73)和塑封外壳(74)，端部绝缘(72)安装在定子铁芯(71)的端面上，线圈绕组(73)卷绕在端部绝缘(72)上，塑封外壳(74)包裹在定子铁芯(71)、端部绝缘(72)和线圈绕组(73)外面，端盖(8)安装在塑封外壳(74)端部，转轴(5)支承在两端盖(8)的轴承上，其特征在于：所述的转子组件(6)是权利要求1至7任何一项所描述的结构。
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