WO2020186706A1 - 一种永磁转子组件及电机 - Google Patents

一种永磁转子组件及电机 Download PDF

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Publication number
WO2020186706A1
WO2020186706A1 PCT/CN2019/105354 CN2019105354W WO2020186706A1 WO 2020186706 A1 WO2020186706 A1 WO 2020186706A1 CN 2019105354 W CN2019105354 W CN 2019105354W WO 2020186706 A1 WO2020186706 A1 WO 2020186706A1
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WIPO (PCT)
Prior art keywords
permanent magnet
end plate
rotor assembly
magnet rotor
blocks
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PCT/CN2019/105354
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English (en)
French (fr)
Inventor
潘明攀
梁三增
李泽凯
Original Assignee
中山大洋电机股份有限公司
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Priority claimed from CN201920363295.7U external-priority patent/CN209419338U/zh
Priority claimed from CN201910217248.6A external-priority patent/CN109768647A/zh
Application filed by 中山大洋电机股份有限公司 filed Critical 中山大洋电机股份有限公司
Publication of WO2020186706A1 publication Critical patent/WO2020186706A1/zh

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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
    • H02K1/27—Rotor cores with permanent magnets
    • 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

Definitions

  • the invention relates to a permanent magnet rotor assembly and a motor.
  • the conventional permanent magnet rotor assembly includes: a permanent magnet 1a and a rotor core 2a.
  • the rotor core 2a includes an annular ring 22a provided with a central shaft hole 21a and several pieces protruding from the outer side of the annular ring 22a.
  • the magnetic conductive block 23a forms a radial groove 24a between two adjacent magnetic conductive blocks 23a, and the permanent magnet 1a is embedded in the radial groove 24a.
  • This structure has the following disadvantages: 1) the rotating shaft is installed in the central shaft hole 21a, and the rotating shaft is rigidly connected to the annular ring 22a, and the shock absorption effect is poor; 2) the rotor core 2a has a large diameter, a large amount of consumables, and a large weight, resulting in high cost.
  • the rotor core part of the current permanent magnet rotor assembly directly omits the annular ring 22a, and directly plastic seals the magnetic block 23a, the permanent magnet 1a and the rotating shaft into a whole by direct injection molding.
  • the structure of the magnetic conductive block 23a can be molded after being matched with the permanent magnet (magnetic tile), but the molding is not stable, easy to loosen, and difficult to put into the mold for the next injection, which affects The quality of injection molding, high rejection rate and low production efficiency are not conducive to mass production.
  • the purpose of the present invention is to provide a permanent magnet rotor assembly and a motor, which solves the problem of poor injection molding quality, low production efficiency and high rejection rate due to the weak combination of the magnetic conductive block of the permanent magnet rotor assembly and the permanent magnet in the prior art problem.
  • a permanent magnet rotor assembly including a number of permanent magnets, a rotor core assembly, a rotating shaft and a plastic package, is characterized in that: the rotor core assembly includes a mounting bracket and a plurality of magnetic conductive blocks, the mounting bracket includes an annular end plate and A number of clamping blocks protruding axially from one end of the ring-shaped end plate are distributed at intervals around the ring-shaped end plate.
  • the magnetic conductive blocks are provided with clamping slots, and several magnetic conductive blocks are installed and formed by the cooperation of the clamping blocks and the clamping slots.
  • a radial groove is formed between two adjacent magnetic conductive blocks.
  • the permanent magnet is nested in the radial groove.
  • the rotating shaft passes through the central hole.
  • the plastic-encapsulated body connects the rotating shaft, several permanent magnets, mounting brackets and several The magnetic conductive block is plastic-sealed into one body.
  • the above-mentioned clip is a V-shaped clip, and a gap is provided in the middle of the V-shaped clip.
  • the above-mentioned mounting bracket is a plastic part.
  • the above-mentioned clamping block is a flat block, and the cross section of the clamping slot is a flat rectangle.
  • the first stop hooks protrude from the magnetic guide blocks on both sides of the outer opening of the radial groove, and the second stop hooks protrude from the magnetic guide blocks on both sides of the inner opening of the radial groove. Installed between the first blocking hook and the second blocking hook.
  • the above-mentioned annular end plate also has annular bosses protruding axially.
  • the annular boss and the clamping block are respectively located on both sides of the annular end plate.
  • the magnetic ring is sleeved on the outside of the annular boss, and the plastic package body plastically seals the mounting bracket and the magnetic ring. together.
  • the above-mentioned plastic package includes an upper end plate, a lower end plate and a central connecting column.
  • the upper end plate and the lower end plate are respectively located at the two ends of the rotor core assembly.
  • the central connecting column is connected between the rotating shaft and the magnetic conductive block and the permanent magnet.
  • the two ends of the column are respectively connected to the upper end plate and the lower end plate.
  • the above-mentioned plastic-encapsulated body further includes peripheral connecting ribs, both ends of the peripheral connecting ribs are respectively connected to the upper end plate and the lower end plate, and the peripheral connecting ribs are sealed in the outer opening.
  • the outer surface of the above-mentioned magnetic conductive block exposes the plastic package body, and the annular end plate is attached to the end surface of the magnetic conductive block.
  • a motor includes a stator assembly, a permanent magnet rotor assembly and a motor housing, and is characterized in that the permanent magnet rotor assembly is the aforementioned permanent magnet rotor assembly.
  • the present invention has the following effects:
  • the rotor core assembly of the present invention includes a mounting bracket and a number of magnetic conductive blocks.
  • the mounting bracket includes a ring-shaped end plate and a number of clamping blocks protruding axially from one end of the ring-shaped end plate.
  • the plates are spaced apart, and the magnetic conductive blocks are provided with clamping slots.
  • Several magnetic conductive blocks are installed through the cooperation of the clamping blocks and the clamping slots to form a central hole.
  • a radial groove is formed between two adjacent magnetic conductive blocks, and the permanent magnets are embedded.
  • the rotating shaft passes through the central hole, and the plastic package body plastically seals the rotating shaft, a plurality of permanent magnets, a mounting bracket and a plurality of magnetic conductive blocks into a whole.
  • the mounting bracket is used to fix several magnetic conductive blocks and permanent magnets.
  • the overall structure has good strength, is not easy to deform, and is convenient to put into the mold for injection. The injection quality is good, the production efficiency is high, and the waste is very low.
  • Fig. 1 is a schematic structural diagram of a permanent magnet rotor assembly in the prior art
  • Figure 2 is a perspective view of a permanent magnet rotor assembly according to the first embodiment of the present invention
  • Figure 3 is an exploded view of the permanent magnet rotor assembly of the first embodiment of the present invention.
  • FIG. 4 is a front view of the permanent magnet rotor assembly of the first embodiment of the present invention.
  • Figure 5 is a cross-sectional view of Figure 4 A-A;
  • Figure 6 is a B-B cross-sectional view of Figure 4.
  • Figure 7 is an exploded view of the first embodiment of the present invention with the plastic package omitted;
  • Figure 8 is a perspective view of the first embodiment of the present invention with the plastic package and the rotating shaft omitted;
  • Fig. 9 is a top view of the first embodiment of the present invention with the plastic package and the rotating shaft omitted.
  • Embodiment 1 As shown in Figures 2-9, the present invention is a permanent magnet rotor assembly, which includes a number of permanent magnets 1, a rotor core assembly 2, a rotating shaft 3, and a plastic enclosure 4.
  • the rotor core assembly 2 includes a mounting bracket 21 and a plurality of magnetic conductive blocks 22.
  • the mounting bracket 21 includes an annular end plate 210 and a plurality of clamping blocks 211 axially protruding from one end surface of the annular end plate 210, and the plurality of clamping blocks 211 are distributed at intervals around the annular end plate 210,
  • the magnetically permeable block 22 is provided with a card slot 221, and several magnetically permeable blocks 22 are installed through the cooperation of the card block 211 and the card slot 221 to form a central hole 24, and a radial groove 23 is formed between two adjacent magnetically permeable blocks 22 ,
  • the permanent magnet 1 is nested in the radial groove 23, the rotating shaft 3 passes through the central hole 24, and the plastic-encapsulated body 4 plastic-encapsulates the rotating shaft 3, a plurality of permanent magnets 1, a mounting bracket 21 and a plurality of magnetic conductive blocks 22 into one body.
  • the mounting bracket 21 is used to fix a number of magnetic conductive blocks 22 and permanent magnets 1.
  • the overall structure has good strength, is not easy to deform, and is convenient to be placed in a mold for injection molding.
  • the injection quality is good, the production efficiency is high, and the waste is very low.
  • the above-mentioned clamping block 211 is a V-shaped clamping block.
  • a gap 2110 is provided in the middle of the V-shaped clamping block.
  • the mounting bracket 21 is a plastic part.
  • the gap 2110 makes the clamping block 211 easy to deform and squeeze into the card slot 221, and it is not easy to fix the magnetic conductive block 22.
  • the clamping block 211 is a flat block, the cross section of the clamping slot 221 is a flat rectangle, the structure is simple, the manufacturing is convenient, and the installation is easy.
  • the first stop hooks 26 protrude from the magnetic conductive blocks 22 on both sides of the outer opening 25 of the above-mentioned radial groove 23, and the magnetic guide blocks 22 on both sides of the inner opening 27 of the radial groove 23 protrude.
  • the second blocking hook 28, the permanent magnet 1 is clamped between the first blocking hook 26 and the second blocking hook 28, and the permanent magnet 1 is firmly and reliably fixed, which is convenient for injection molding.
  • annular end plate 210 also axially protrudes an annular boss 212, the annular boss 212 and the clamping block 211 are respectively located on both sides of the annular end plate 210, the magnetic ring 5 is sleeved on the outer side of the annular boss 212, and the plastic body 4 Plastic seal the mounting bracket 21 and the magnetic ring 5 together.
  • the structure is simple, the integrity is strong, the installation is convenient, and the integral injection is convenient.
  • the above-mentioned plastic package 4 includes an upper end plate 41, a lower end plate 42 and a central connecting column 43.
  • the upper end plate 41 and the lower end plate 42 are respectively located at both ends of the rotor core assembly 2.
  • the central connecting column 43 is connected to the rotating shaft 3 and the magnetic conductor Between the block 22 and the permanent magnet 1, the two ends of the central connecting column 43 are respectively connected to the upper end plate 41 and the lower end plate 42.
  • the central connecting column 43 is used to connect between the rotating shaft 3 and the magnetic block 22 and the permanent magnet 1, which has good shock absorption effect and low manufacturing cost.
  • the radial size of the rotor core assembly 2 can be greatly reduced, and the manufacturing cost can be greatly reduced.
  • the above-mentioned plastic package 4 further includes a peripheral connecting rib 44.
  • the two ends of the peripheral connecting rib 44 are respectively connected to the upper end plate 41 and the lower end plate 42.
  • the peripheral connecting rib 44 is sealed in the outer opening 25, and the structure strength is better. The fixing effect is better.
  • the outer surface 220 of the magnetic conductive block 22 exposes the plastic package 4, and the annular end plate 210 is attached to the end surface of the magnetic conductive block 22, which is easy to install.
  • This embodiment provides a motor including a stator assembly, a permanent magnet rotor assembly and a motor housing, and is characterized in that the permanent magnet rotor assembly is the permanent magnet rotor assembly described in the first embodiment.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Permanent Field Magnets Of Synchronous Machinery (AREA)

Abstract

一种永磁转子组件及电机，该永磁转子组件包括若干永磁体(1)、转子铁芯组件(2)、转轴(3)和塑封体(4)，转子铁芯组件(2)包括安装支架(21)和若干个导磁块(22)，安装支架(21)包括环形端板(210)和从环形端板(210)一端面轴向凸起的若干卡块(211)，若干卡块(211)绕环形端板(210)间隔分布，导磁块(22)上设置有卡槽(221)，若干个导磁块(22)通过卡块(211)和卡槽(221)的配合安装并形成中心孔(24)，在相邻两导磁块(22)之间形成径向凹槽(23)，永磁体(1)嵌套在径向凹槽(23)里面，转轴(3)穿过中心孔(24)，塑封体(4)将转轴(3)、若干永磁体(1)、安装支架(21)和若干个导磁块(22)塑封成一体。它利用安装支架(21)固定若干个导磁块(22)和永磁体(1)，整体的结构强度好，不易变形，注塑质量好，生产效率高，废品率低。

Description

一种永磁转子组件及电机 技术领域：
本发明涉及一种永磁转子组件及电机。
背景技术：
如图1所示，传统的永磁转子组件包括：包括永磁体1a和转子铁芯2a,转子铁芯2a包括设置有中心轴孔21a的环形圈22a和从环形圈22a外侧凸出的若干块导磁块23a,在相邻两导磁块23a之间形成径向凹槽24a，永磁体1a嵌入径向凹槽24a里。这种结构存在如下缺点：1)转轴安装在中心轴孔21a，转轴与环形圈22a硬性连接，减震效果差；2)转子铁芯2a直径大，耗材多，重量大，导致成本偏高。
有鉴于此，为了解决现有的技术问题，现在的永磁转子组件的转子铁芯部分直接省略环形圈22a，通过直接注塑方式将导磁块23a、永磁体1a和转轴直接塑封成一整体。可以大幅降低成本和获得一定的减震效果。但导磁块23a结构因独立的原因，在和永磁体(磁瓦)配合后，虽然也能成型，但这种成型不太稳定，容易松动，不易放入模具中进行下一步的注塑，影响注塑的质量，废品率高，生产效率低，不利于大规模生产。
发明内容：
本发明的目的是提供一种永磁转子组件及电机，解决现有技术中的永磁转子组件的导磁块与永磁体结合不牢固导致注塑质量差和生产效率低，废品率偏高的技术问题。
本发明的目的是通过下述技术方案予以实现的：
一种永磁转子组件，包括若干永磁体、转子铁芯组件、转轴和塑封体，其特征在于：转子铁芯组件包括安装支架和若干个导磁块，所述的安装支架包括环形端板和从环形端板一端面轴向凸起的若干卡块，若干卡块绕环形端板间隔分布，导磁块上设置有卡槽，若干个导磁块通过卡块和卡槽的配合安装并形成 的中心孔，在相邻两导磁块之间形成径向凹槽，永磁体嵌套在径向凹槽里面，转轴穿过中心孔，塑封体将转轴、若干永磁体、安装支架和若干个导磁块塑封成一体。
上述的卡块是V形卡块，V形卡块中间设置缺口。
上述的安装支架是一个塑料件。
上述的卡块是扁平的块状，卡槽的截面是扁平的长方形。
上述的径向凹槽的外侧开口部的两侧导磁块上凸出第一挡钩，在径向凹槽的内侧开口部的两侧导磁块上凸出第二挡钩，永磁体夹装在第一挡钩与第二挡钩之间。
上述的环形端板还轴向凸出有环形凸台，环形凸台与卡块分别位于环形端板的两侧，磁环套装在环形凸台的外侧，塑封体将安装支架、磁环塑封在一起。
上述所述的塑封体包括上端板、下端板和中心连接柱，上端板、下端板分别位于转子铁芯组件的两端，中心连接柱连接在转轴与导磁块、永磁体之间，中心连接柱两端分别连接上端板、下端板。
上述的塑封体还包括外围连接筋，外围连接筋的两端分别连接上端板、下端板，外围连接筋封堵在外侧开口部。
上述的导磁块的外侧面露出塑封体，环形端板与导磁块的端面贴合。
一种电机，包括定子组件、永磁转子组件和电机外壳，其特征在于：永磁转子组件是上述所述的永磁转子组件。
本发明与现有技术相比，具有如下效果：
1)本发明的转子铁芯组件包括安装支架和若干个导磁块，所述的安装支架包括环形端板和从环形端板一端面轴向凸起的若干卡块，若干卡块绕环形端板间隔分布，导磁块上设置有卡槽，若干个导磁块通过卡块和卡槽的配合安装并形成中心孔，在相邻两导磁块之间形成径向凹槽，永磁体嵌套在径向凹槽里面，转轴穿过中心孔，塑封体将转轴、若干永磁体、安装支架和若干个导磁块 塑封成一体。利用安装支架固定若干个导磁块和永磁体，整体的结构强度好，不易变形，方便放入模具中进行注塑，注塑质量好，生产效率高，废品非常低。
2)本发明的其它优点在实施例部分展开详细描述。
附图说明：
图1是现有技术中的永磁转子组件的结构示意图；
图2是本发明实施例一的永磁转子组件的立体图；
图3是本发明实施例一的永磁转子组件的分解图；
图4是本发明实施例一的永磁转子组件的的主视图；
图5是图4的A-A剖视图；
图6是图4的B-B剖视图；
图7是本发明实施例一省略塑封体后的分解图；
图8是本发明实施例一省略塑封体和转轴后立体图；
图9是本发明实施例一省略塑封体和转轴后的俯视图。
具体实施方式：
下面通过具体实施例并结合附图对本发明作进一步详细的描述。
实施例一：
实施例一：如图2至图9所示，本发明是一种永磁转子组件，包括若干永磁体1、转子铁芯组件2、转轴3和塑封体4，转子铁芯组件2包括安装支架21和若干个导磁块22，所述的安装支架21包括环形端板210和从环形端板210一端面轴向凸起的若干卡块211，若干卡块211绕环形端板210间隔分布，导磁块22上设置有卡槽221，若干个导磁块22通过卡块211和卡槽221的配合安装并形成中心孔24，在相邻两导磁块22之间形成径向凹槽23，永磁体1嵌套在径向凹槽23里面，转轴3穿过中心孔24，塑封体4将转轴3、若干永磁体1、安装支架21和若干个导磁块22塑封成一体。利用安装支架21固定若干个导磁块22和永磁体1，整体的结构强度好，不易变形，方便放入模具中进行注塑，注 塑质量好，生产效率高，废品非常低。
上述卡块211是V形卡块，V形卡块中间设置缺口2110，安装支架21是一个塑料件，缺口2110使卡块211容易变形挤入卡槽221，很好固定导磁块22，不易松动，卡块211是扁平的块状，卡槽221的截面是扁平的长方形，结构简单，制造方便，容易安装。
上述的径向凹槽23的外侧开口部25的两侧导磁块22上凸出第一挡钩26，在径向凹槽23的内侧开口部27的两侧导磁块22上凸出第二挡钩28，永磁体1夹装在第一挡钩26与第二挡钩28之间，永磁体1固定牢固可靠，方便进行注塑。
上述的环形端板210还轴向凸出有环形凸台212，环形凸台212与卡块211分别位于环形端板210的两侧，磁环5套装在环形凸台212的外侧，塑封体4将安装支架21、磁环5塑封在一起。结构简单，整体性强，安装方便，便于整体注塑。
上述所述的塑封体4包括上端板41、下端板42和中心连接柱43，上端板41、下端板42分别位于转子铁芯组件2的两端，中心连接柱43连接在转轴3与导磁块22、永磁体1之间，中心连接柱43两端分别连接上端板41和下端板42。利用中心连接柱43连接在转轴3与导磁块22、永磁体1之间，减震效果好，且制造成本低，同时可以大幅减小转子铁芯组件2径向尺寸，大幅降低制造成本。
上述的塑封体4还包括外围连接筋44，外围连接筋44的两端分别连接上端板41、下端板42，外围连接筋44封堵在外侧开口部25，结构强度更好，对永磁体1的固定效果更好。
上述导磁块22的外侧面220露出塑封体4，环形端板210与导磁块22的端面贴合，安装简便。
实施例二:
本实施例提供的是一种电机，包括定子组件、永磁转子组件和电机外壳，其特征在于：永磁转子组件是实施例一所述的永磁转子组件。
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 (10)

  1. 一种永磁转子组件，包括若干永磁体(1)、转子铁芯组件(2)、转轴(3)和塑封体(4)，其特征在于：转子铁芯组件(2)包括安装支架(21)和若干个导磁块(22)，所述的安装支架(21)包括环形端板(210)和从环形端板(210)一端面轴向凸起的若干卡块(211)，若干卡块(211)绕环形端板(210)间隔分布，导磁块(22)上设置有卡槽(221)，若干个导磁块(22)通过卡块(211)和卡槽(221)的配合安装并形成中心孔(24)，在相邻两导磁块(22)之间形成径向凹槽(23)，永磁体(1)嵌套在径向凹槽(23)里面，转轴(3)穿过中心孔(24)，塑封体(4)将转轴(3)、若干永磁体(1)、安装支架(21)和若干个导磁块(22)塑封成一体。
  2. 根据权利要求1所述的一种永磁转子组件，其特征在于：卡块(211)是V形卡块，V形卡块中间设置缺口(2110)。
  3. 根据权利要求2所述的一种永磁转子组件，其特征在于：安装支架(21)是一个塑料件。
  4. 根据权利要求3所述的一种永磁转子组件，其特征在于：卡块(211)是扁平的块状，卡槽(221)的截面是扁平的长方形。
  5. 根据权利要求1或2或3或4所述的一种永磁转子组件，其特征在于：径向凹槽(23)的外侧开口部(25)的两侧导磁块(22)上凸出第一挡钩(26)，在径向凹槽(23)的内侧开口部(27)的两侧导磁块(22)上凸出第二挡钩(28)，永磁体(1)夹装在第一挡钩(26)与第二挡钩(28)之间。
  6. 根据权利要求5所述的一种永磁转子组件，其特征在于：环形端板(210)还轴向凸出有环形凸台(212)，环形凸台(212)与卡块(211)分别位于环形端板(210)的两侧，磁环(5)套装在环形凸台(212)的外侧，塑封体(4)将安装支架(21)、磁环(5)塑封在一起。
  7. 根据权利要求6所述的一种永磁转子组件，其特征在于：所述的塑封体(4)包括上端板(41)、下端板(42)和中心连接柱(43)，上端板(41)、下 端板(42)分别位于转子铁芯组件(2)的两端，中心连接柱(43)连接在转轴与导磁块(22)、永磁体(1)之间，中心连接柱(43)两端分别连接上端板(41)、下端板(42)。
  8. 根据权利要求7所述的一种永磁转子组件，其特征在于：塑封体(4)还包括外围连接筋(44)，外围连接筋(44)的两端分别连接上端板(41)、下端板(42)，外围连接筋(44)封堵在外侧开口部(25)。
  9. 根据权利要求8所述的一种永磁转子组件，其特征在于：导磁块(22)的外侧面(220)露出塑封体(4)，环形端板(210)与导磁块(22)的端面贴合。
  10. 一种电机，包括定子组件、永磁转子组件和电机外壳，其特征在于：永磁转子组件是权利要求1至9任意一项所述的永磁转子组件。
PCT/CN2019/105354 2019-03-21 2019-09-11 一种永磁转子组件及电机 WO2020186706A1 (zh)

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CN202721586U (zh) * 2012-06-29 2013-02-06 中山大洋电机股份有限公司 一种转子组件
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