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WO2014146338A1 - Structure of direct current plastic packaging motor - Google Patents

Structure of direct current plastic packaging motor Download PDF

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Publication number
WO2014146338A1
WO2014146338A1 PCT/CN2013/075060 CN2013075060W WO2014146338A1 WO 2014146338 A1 WO2014146338 A1 WO 2014146338A1 CN 2013075060 W CN2013075060 W CN 2013075060W WO 2014146338 A1 WO2014146338 A1 WO 2014146338A1
Authority
WO
WIPO (PCT)
Prior art keywords
plastic
end cover
bearing
end housing
plastic packaging
Prior art date
Application number
PCT/CN2013/075060
Other languages
French (fr)
Chinese (zh)
Inventor
潘明攀
黄廷帅
丁小勇
金建伟
赵勇
Original Assignee
中山大洋电机股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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
Priority to JP2015556365A priority Critical patent/JP6113866B2/en
Publication of WO2014146338A1 publication Critical patent/WO2014146338A1/en

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/10—Casings or enclosures characterised by the shape, form or construction thereof with arrangements for protection from ingress, e.g. water or fingers
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/15—Mounting arrangements for bearing-shields or end plates
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
    • H02K5/173—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings
    • H02K5/1732—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings radially supporting the rotary shaft at both ends of the rotor
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/22—Auxiliary parts of casings not covered by groups H02K5/06-H02K5/20, e.g. shaped to form connection boxes or terminal boxes
    • H02K5/225—Terminal boxes or connection arrangements

Definitions

  • the utility model relates to a structure of a DC plastic sealing motor.
  • the air-conditioning adopts plastic-sealed DC motor with short life.
  • the main faults are concentrated on the electric corrosion of ball bearings.
  • the main performances are as follows: 1) Since the plastic-sealed DC motor adopts PWM signal control, the voltage is switched at high speed, and the shaft voltage is generated between the inner and outer rings of the bearing. The bearing lubricating oil is damaged by insulation, and a shaft current is generated, which causes wavy wear on the inner and outer wheels of the bearing, and abnormal noise occurs. 2. Electro-erosion is caused by current discharge.
  • the DC plastic-sealed motor end cover and the stator core are insulated and completely insulated.
  • stator coil passes the high-frequency modulation voltage, a voltage difference is formed between the metal end caps due to the coupling effect.
  • the current forms a loop through the end caps of the rotating shaft and the bearing.
  • the current breaks through the oil film discharge between the ball and the inner and outer rings of the bearing to generate high temperature, which causes the bearing to partially melt and form spots, pits, accelerate wear speed, produce noise, and shorten life.
  • the purpose of the utility model is to provide a DC plastic-sealed motor structure, which is simple and reasonable in design, convenient in manufacture, can effectively reduce the shaft current, reduce the occurrence of electric corrosion, effectively improve the service life of the ball bearing, and reduce the fault and noise of the motor.
  • a DC plastic motor structure comprising a front end cover, a rear end cover, a plastic stator assembly, a rotor assembly, a front bearing and a rear bearing, wherein the plastic stator assembly comprises a stator core, a stator winding and a plastic casing, and the center of the plastic stator assembly is formed
  • the cavity is characterized in that: the front end cover is made of a non-magnetic material, the front end cover is nested and installed at one end of the plastic sealing case, and the front bearing is installed in the front bearing chamber of the front end cover, the rear end cover is made of metal, and the rear end cover is installed at The other end of the plastic casing is provided with an insulating layer on the inner wall surface of the rear bearing chamber in the rear end cover, and the rear bearing is installed in the rear bearing chamber, and the insulating layer separates the rear bearing and the rear end cover.
  • the rotor assembly is placed inside the cavity, and the rotating shaft on the rotor assembly is mounted on the front and rear bearings.
  • the rear end cover described above is a SPCC steel stamping or a cast aluminum part.
  • the insulating layer described above is made of a high-strength plastic steel material.
  • the front end cover described above is injection molded with the plastic outer casing, and the plastic outer casing encloses the front end cover.
  • the rotor assembly described above comprises a permanent magnet, an outer iron core, an inner iron core and a rotating shaft, and the rotating shaft is set on the inner iron core, and the outer iron core and the inner iron core are connected by an insulating damping belt, and the outer iron core is permanently installed. magnet.
  • the front end cover described above is made of an insulating plastic material or a PPS plastic material.
  • the front end cover is made of non-magnetic material such as insulating plastic steel, the front end cover is insulated from the front bearing, and the rear end cover is made of metal to ensure machining precision and front and rear bearings.
  • Concentricity an inner layer of the rear bearing chamber inside the rear end cover is provided with an insulating layer, and the rear bearing is installed inside the rear bearing chamber, and the insulating layer separates the rear bearing and the rear end cover from each other, thereby reducing the coupling effect and cutting the front end cover and the front end
  • the current path of the bearing, the rear end cover and the rear bearing is simple and reasonable, and the manufacturing is convenient.
  • the shaft current can be effectively reduced, the electric corrosion phenomenon can be reduced, the service life of the ball bearing can be effectively improved, and the fault and noise of the motor can be reduced; 2)
  • the rotor assembly comprises a permanent magnet, an outer iron core, an inner iron core and a rotating shaft, and the rotating shaft is set on the inner iron core, and the outer iron core and the inner iron core are connected by an insulating damper belt, and the outer iron core is provided with a permanent magnet, thereby effectively reducing
  • the shaft current generated by the rotor assembly reduces the occurrence of electrical corrosion;
  • the front end cover described above is injection molded with the plastic outer casing, and the plastic outer casing encloses the front end cover to improve the structural strength of the
  • Figure 1 is a perspective view of the utility model
  • Figure 2 is an exploded view of the utility model
  • Figure 3 is another exploded view of the utility model
  • Figure 4 is a front view of the utility model
  • Figure 5 is a cross-sectional view taken along line A-A of Figure 4.
  • Figure 6 is a structural schematic view of the utility model after hiding the plastic casing.
  • a DC plastic motor structure comprises a front end cover 3, a rear end cover 4, a plastic stator assembly 1, a rotor assembly 2, a front bearing 5 and a rear bearing 6, and the plastic stator assembly 1 is The stator core 12, the stator winding 13 and the plastic casing 11 are formed.
  • the center of the plastic stator assembly 1 forms a cavity 14.
  • the front end cover 3 is made of a non-magnetic material, and can be made of an insulating plastic material or a plastic PPS material, and the front end cover 2 is nested.
  • the front bearing 5 is mounted in the front bearing chamber 31 of the front end cover 3, the rear end cover 4 is made of metal, and the rear end cover 4 is mounted at the other end of the plastic case 11, and the rear end of the rear cover 4
  • An inner surface of the bearing chamber 41 is provided with an insulating layer 42.
  • the rear bearing 6 is mounted inside the rear bearing chamber 41.
  • the insulating layer 42 isolates and insulates the rear bearing 6 and the rear end cover 4, and the rotor assembly 2 is placed inside the cavity 14, the rotor assembly 2
  • the upper rotating shaft 21 is mounted and supported on the front bearing 5 and the rear bearing 6.
  • the rear end cover 4 is a SPCC steel stamping or a cast aluminum piece, and the insulating layer 42 is made of high-strength plastic steel material, and the front end cover 3 In the injection molding of the housing 11 together, wrapped in plastic front cover 11 of the housing 3.
  • the rotor set 2 includes a permanent magnet 22, an outer iron core 24, an inner iron core 23 and a rotating shaft 21, and the rotating shaft 21 is set on the inner iron core 23, and the outer iron core 24 and the inner iron core 23 are insulated by insulation.
  • the belt 25 is connected, and the permanent magnet 22 is mounted on the outer core 24.
  • the principle of the utility model is: the front end cover 3 is made of insulating plastic steel material, the front end cover 3 and the front
  • the bearing 5 is insulated
  • the rear end cover 4 is made of metal to ensure machining accuracy and concentricity of the front and rear bearings.
  • the inner wall surface of the rear bearing chamber 41 inside the rear end cover 4 is provided with an insulating layer 42 which is installed in the rear bearing chamber 41.
  • the insulating layer 42 isolates and insulates the rear bearing 6 and the rear end cover 4, thereby reducing the coupling effect and cutting the current path of the front end cover and the front bearing, the rear end cover and the rear bearing.
  • the design is simple and reasonable, and the manufacturing is convenient, and the shaft can be effectively reduced.
  • the outer core 24 and the inner core 23 of the rotor assembly 2 are connected by the insulating damper 25, the outer core
  • the permanent magnet 22 is mounted on the 24 to effectively reduce the shaft current generated by the rotor assembly and reduce the occurrence of electrical corrosion.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Motor Or Generator Frames (AREA)

Abstract

A structure of a direct current plastic packaging motor comprises a front end housing, a back end housing, a plastic packaging stator component, a rotor component, a fore bearing, and a rear bearing. The plastic packaging stator component comprises a stator core, a stator winding, and a plastic packaging cover. A hollow cavity is formed at the center of the plastic packaging stator component. The front end housing is made from insulating plastic steel materials, the front end housing is nested at one end of the plastic packaging cover, and the fore bearing is disposed inside a fore bearing house of the front end housing. The back end housing is made from metal, and the back end housing is installed at the other end of the plastic packaging house. An inner wall of the rear bearing house in the back end housing is covered with an insulation layer, and the rear bearing is installed inside the rear bearing house. The insulation layer isolates the rear bearing and the back end housing. The rotor component is disposed inside the hollow cavity. A rotation shaft on the rotor component is installed on and supports the fore bearing and the rear bearing. The design is simple and appropriate, and the manufacturing is convenient, so as to effectively reduce shaft current, reduce occurrence of electro corrosion, effectively improve a life span of a ball bearing, and reduce faults and noise of the motor.

Description

一种直流塑封电机结构  DC plastic motor structure
技术领域 ： Technical field:
本实用新型涉及一种直流塑封电机结构。  The utility model relates to a structure of a DC plastic sealing motor.
背景技术 ： Background technique :
目前， 空调采用塑封直流电机寿命短， 主要故障集中在滚珠轴承的电腐蚀 问题， 主要表现在： 1 ) 由于塑封直流电机采用 PWM信号控制， 电压高速切换， 在轴承内外圈之间产生轴电压， 使轴承的润滑油产生绝缘破坏， 发生轴电流， 导致轴承内外轮产生波状磨耗， 发生异音。 2.电蚀由电流放电引起， 直流塑 封电机端盖与定子铁芯之间是绝缘材料， 完全绝缘， 当定子线圈通过高频调制 电压时由于耦合效应， 在金属端盖之间形成电压差， 电流经转轴、轴承相配的 端盖形成回路， 电流在滚珠和轴承内外圈之间击穿油膜放电产生高温， 造成轴 承局部熔融形成斑点， 凹坑， 加快磨损速度， 生产噪音， 缩短寿命。  At present, the air-conditioning adopts plastic-sealed DC motor with short life. The main faults are concentrated on the electric corrosion of ball bearings. The main performances are as follows: 1) Since the plastic-sealed DC motor adopts PWM signal control, the voltage is switched at high speed, and the shaft voltage is generated between the inner and outer rings of the bearing. The bearing lubricating oil is damaged by insulation, and a shaft current is generated, which causes wavy wear on the inner and outer wheels of the bearing, and abnormal noise occurs. 2. Electro-erosion is caused by current discharge. The DC plastic-sealed motor end cover and the stator core are insulated and completely insulated. When the stator coil passes the high-frequency modulation voltage, a voltage difference is formed between the metal end caps due to the coupling effect. The current forms a loop through the end caps of the rotating shaft and the bearing. The current breaks through the oil film discharge between the ball and the inner and outer rings of the bearing to generate high temperature, which causes the bearing to partially melt and form spots, pits, accelerate wear speed, produce noise, and shorten life.
发明内容 ： Summary of the invention:
本实用新型的目的是提供一种直流塑封电机结构， 该设计简单合理， 制造 方便， 可以有效降低轴电流， 减少电腐蚀现象的发生， 有效提高滚珠轴承的使 用寿命， 降低电机的故障和噪音。  The purpose of the utility model is to provide a DC plastic-sealed motor structure, which is simple and reasonable in design, convenient in manufacture, can effectively reduce the shaft current, reduce the occurrence of electric corrosion, effectively improve the service life of the ball bearing, and reduce the fault and noise of the motor.
本实用新型的目的是通过下述技术方案予以实现的。  The object of the present invention is achieved by the following technical solutions.
一种直流塑封电机结构，包括前端盖、后端盖、塑封定子组件、转子组件、 前轴承和后轴承， 所述的塑封定子组件包括定子铁芯、 定子绕组和塑封外壳， 塑封定子组件中心形成空腔， 其特征在于： 前端盖是不导磁材料制造， 前端盖 嵌套安装在塑封外壳的一端， 前端盖的前轴承室里面安装前轴承， 后端盖是 金属制造， 后端盖安装在塑封外壳的另一端， 后端盖里面的后轴承室的内壁 面铺设绝缘层， 后轴承安装在后轴承室里面， 绝缘层将后轴承和后端盖隔离绝 缘， 转子组件放置在空腔里面， 转子组件上的转轴安装支撑在前轴承和后轴承 上。 A DC plastic motor structure comprising a front end cover, a rear end cover, a plastic stator assembly, a rotor assembly, a front bearing and a rear bearing, wherein the plastic stator assembly comprises a stator core, a stator winding and a plastic casing, and the center of the plastic stator assembly is formed The cavity is characterized in that: the front end cover is made of a non-magnetic material, the front end cover is nested and installed at one end of the plastic sealing case, and the front bearing is installed in the front bearing chamber of the front end cover, the rear end cover is made of metal, and the rear end cover is installed at The other end of the plastic casing is provided with an insulating layer on the inner wall surface of the rear bearing chamber in the rear end cover, and the rear bearing is installed in the rear bearing chamber, and the insulating layer separates the rear bearing and the rear end cover. The rotor assembly is placed inside the cavity, and the rotating shaft on the rotor assembly is mounted on the front and rear bearings.
上述所述的后端盖是 SPCC钢材冲压件或者是铸铝件。  The rear end cover described above is a SPCC steel stamping or a cast aluminum part.
上述所述的绝缘层是高强度塑钢材料制造。  The insulating layer described above is made of a high-strength plastic steel material.
上述所述的前端盖与在塑封外壳的注塑在一起， 塑封外壳包裹住前端盖。 上述所述的转子组件包括永磁体、 外铁芯、 内铁芯和转轴， 转轴套装在内 铁芯上， 外铁芯、 内铁芯之间通过绝缘减震带连接， 外铁芯上安装永磁体。  The front end cover described above is injection molded with the plastic outer casing, and the plastic outer casing encloses the front end cover. The rotor assembly described above comprises a permanent magnet, an outer iron core, an inner iron core and a rotating shaft, and the rotating shaft is set on the inner iron core, and the outer iron core and the inner iron core are connected by an insulating damping belt, and the outer iron core is permanently installed. magnet.
上述所述的前端盖是绝缘塑钢材料或者是 PPS塑料材料制造。  The front end cover described above is made of an insulating plastic material or a PPS plastic material.
本实用新型与现有技术相比， 具有如下效果： 1 ) 前端盖采用绝缘塑钢材 等不导磁材料制造制造， 前端盖与前轴承绝缘， 后端盖是金属制造保证加工 精度和前后轴承的同心度， 后端盖里面的后轴承室的内壁面铺设绝缘层， 后 轴承安装在后轴承室里面， 绝缘层将后轴承和后端盖隔离绝缘， 这样可以降低 耦合效应， 切断前端盖与前轴承、 后端盖与后轴承的电流通路， 该设计简单合 理， 制造方便， 可以有效降低轴电流， 减少电腐蚀现象的发生， 有效提高滚珠 轴承的使用寿命， 降低电机的故障和噪音； 2 )转子组件包括永磁体、 外铁芯、 内铁芯和转轴， 转轴套装在内铁芯上， 外铁芯、 内铁芯之间通过绝缘减震带连 接， 外铁芯上安装永磁体， 有效降低转子组件产生的轴电流， 减少电腐蚀现象 的发生； 3 ) 后端盖里面的后轴承室的内壁面铺设绝缘层， 绝缘层是高强度塑 钢材料制造， 后端盖是 SPCC钢材冲压件或者是铸铝件， 可以有效保证零件制 造精度、 前轴承和后轴承同心度， 结构简单， 制造方便。 4 )上述所述的前端 盖与在塑封外壳的注塑在一起， 塑封外壳包裹住前端盖， 提高前端盖的结构强 度。  Compared with the prior art, the utility model has the following effects: 1) The front end cover is made of non-magnetic material such as insulating plastic steel, the front end cover is insulated from the front bearing, and the rear end cover is made of metal to ensure machining precision and front and rear bearings. Concentricity, an inner layer of the rear bearing chamber inside the rear end cover is provided with an insulating layer, and the rear bearing is installed inside the rear bearing chamber, and the insulating layer separates the rear bearing and the rear end cover from each other, thereby reducing the coupling effect and cutting the front end cover and the front end The current path of the bearing, the rear end cover and the rear bearing is simple and reasonable, and the manufacturing is convenient. The shaft current can be effectively reduced, the electric corrosion phenomenon can be reduced, the service life of the ball bearing can be effectively improved, and the fault and noise of the motor can be reduced; 2) The rotor assembly comprises a permanent magnet, an outer iron core, an inner iron core and a rotating shaft, and the rotating shaft is set on the inner iron core, and the outer iron core and the inner iron core are connected by an insulating damper belt, and the outer iron core is provided with a permanent magnet, thereby effectively reducing The shaft current generated by the rotor assembly reduces the occurrence of electrical corrosion; 3) the inner wall surface of the rear bearing chamber inside the rear end cover Insulating layer, the insulating layer is a plastic of high strength steel material, after the cover is SPCC steel stamping or cast aluminum, can effectively guarantee the precision manufacturing of parts, the front and rear bearings concentricity, simple structure, easy manufacture. 4) The front end cover described above is injection molded with the plastic outer casing, and the plastic outer casing encloses the front end cover to improve the structural strength of the front end cover.
附图说明： 图 1 是本实用新型的立体图； BRIEF DESCRIPTION OF THE DRAWINGS: Figure 1 is a perspective view of the utility model;
图 2 是本实用新型的一个分解图；  Figure 2 is an exploded view of the utility model;
图 3 是本实用新型的另一个分解图；  Figure 3 is another exploded view of the utility model;
图 4 是本实用新型的主视图；  Figure 4 is a front view of the utility model;
图 5是图 4的 A-A剖视图；  Figure 5 is a cross-sectional view taken along line A-A of Figure 4;
图 6是本实用新型隐藏塑封外壳后的结构原理图。  Figure 6 is a structural schematic view of the utility model after hiding the plastic casing.
具体实施方式： detailed description:
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。  The present invention will be further described in detail below through the specific embodiments and the accompanying drawings.
如图 1至图 6所示， 一种直流塑封电机结构， 包括前端盖 3、 后端盖 4、 塑封定子组件 1、 转子组件 2、 前轴承 5和后轴承 6， 所述的塑封定子组件 1 包括定子铁芯 12、定子绕组 13和塑封外壳 11， 塑封定子组件 1中心形成空腔 14,前端盖 3是不导磁材料制造，可以是绝缘塑钢材料或者塑料 PPS材料制造， 前端盖 2嵌套安装在塑封外壳 11的一端， 前端盖 3的前轴承室 31里面安装 前轴承 5， 后端盖 4是金属制造，后端盖 4安装在塑封外壳 11的另一端， 后 端盖 4里面的后轴承室 41的内壁面铺设绝缘层 42， 后轴承 6安装在后轴承室 41里面， 绝缘层 42将后轴承 6和后端盖 4隔离绝缘， 转子组件 2放置在空腔 14里面， 转子组件 2上的转轴 21安装支撑在前轴承 5和后轴承 6上， 后端盖 4是 SPCC钢材冲压件或者是铸铝件，所述的绝缘层 42是高强度塑钢材料制造， 前端盖 3与在塑封外壳 11的注塑在一起， 塑封外壳 11包裹住前端盖 3。 所述 的转子组 2件包括永磁体 22、 外铁芯 24、 内铁芯 23和转轴 21， 转轴 21套装 在内铁芯 23上， 外铁芯 24、 内铁芯 23之间通过绝缘减震带 25连接， 外铁芯 24上安装永磁体 22。  As shown in FIG. 1 to FIG. 6, a DC plastic motor structure comprises a front end cover 3, a rear end cover 4, a plastic stator assembly 1, a rotor assembly 2, a front bearing 5 and a rear bearing 6, and the plastic stator assembly 1 is The stator core 12, the stator winding 13 and the plastic casing 11 are formed. The center of the plastic stator assembly 1 forms a cavity 14. The front end cover 3 is made of a non-magnetic material, and can be made of an insulating plastic material or a plastic PPS material, and the front end cover 2 is nested. Mounted at one end of the plastic case 11, the front bearing 5 is mounted in the front bearing chamber 31 of the front end cover 3, the rear end cover 4 is made of metal, and the rear end cover 4 is mounted at the other end of the plastic case 11, and the rear end of the rear cover 4 An inner surface of the bearing chamber 41 is provided with an insulating layer 42. The rear bearing 6 is mounted inside the rear bearing chamber 41. The insulating layer 42 isolates and insulates the rear bearing 6 and the rear end cover 4, and the rotor assembly 2 is placed inside the cavity 14, the rotor assembly 2 The upper rotating shaft 21 is mounted and supported on the front bearing 5 and the rear bearing 6. The rear end cover 4 is a SPCC steel stamping or a cast aluminum piece, and the insulating layer 42 is made of high-strength plastic steel material, and the front end cover 3 In the injection molding of the housing 11 together, wrapped in plastic front cover 11 of the housing 3. The rotor set 2 includes a permanent magnet 22, an outer iron core 24, an inner iron core 23 and a rotating shaft 21, and the rotating shaft 21 is set on the inner iron core 23, and the outer iron core 24 and the inner iron core 23 are insulated by insulation. The belt 25 is connected, and the permanent magnet 22 is mounted on the outer core 24.
本实用新型的原理是： 前端盖 3采用绝缘塑钢材料制造， 前端盖 3与前 轴承 5绝缘， 后端盖 4是金属制造保证加工精度和前后轴承的同心度， 后端 盖 4里面的后轴承室 41的内壁面铺设绝缘层 42，后轴承 6安装在后轴承室 41 里面， 绝缘层 42将后轴承 6和后端盖 4隔离绝缘， 这样可以降低耦合效应， 切断前端盖与前轴承、 后端盖与后轴承的电流通路， 该设计简单合理， 制造方 便， 可以有效降低轴电流， 减少电腐蚀现象的发生， 有效提高滚珠轴承的使用 寿命， 降低电机的故障和噪音； 转子组件 2的外铁芯 24、 内铁芯 23之间通过 绝缘减震带 25连接， 外铁芯 24上安装永磁体 22， 有效降低转子组件产生的 轴电流， 减少电腐蚀现象的发生。 The principle of the utility model is: the front end cover 3 is made of insulating plastic steel material, the front end cover 3 and the front The bearing 5 is insulated, and the rear end cover 4 is made of metal to ensure machining accuracy and concentricity of the front and rear bearings. The inner wall surface of the rear bearing chamber 41 inside the rear end cover 4 is provided with an insulating layer 42 which is installed in the rear bearing chamber 41. The insulating layer 42 isolates and insulates the rear bearing 6 and the rear end cover 4, thereby reducing the coupling effect and cutting the current path of the front end cover and the front bearing, the rear end cover and the rear bearing. The design is simple and reasonable, and the manufacturing is convenient, and the shaft can be effectively reduced. Current, reduce the occurrence of electric corrosion, effectively improve the service life of the ball bearing, reduce the fault and noise of the motor; the outer core 24 and the inner core 23 of the rotor assembly 2 are connected by the insulating damper 25, the outer core The permanent magnet 22 is mounted on the 24 to effectively reduce the shaft current generated by the rotor assembly and reduce the occurrence of electrical corrosion.

Claims

权利要求 Rights request
1、 一种直流塑封电机结构， 包括前端盖、 后端盖、 塑封定子组件、 转 子组件、 前轴承和后轴承， 所述的塑封定子组件包括定子铁芯、 定子绕组和塑 封外壳，塑封定子组件中心形成空腔，其特征在于：前端盖是不导磁材料制造， 前端盖嵌套安装在塑封外壳的一端， 前端盖的前轴承室里面安装前轴承， 后 端盖是金属制造， 后端盖安装在塑封外壳的另一端， 后端盖里面的后轴承室 的内壁面铺设绝缘层， 后轴承安装在后轴承室里面， 绝缘层将后轴承和后端盖 隔离绝缘， 转子组件放置在空腔里面， 转子组件上的转轴安装支撑在前轴承和 后轴承上。 1. A DC plastic motor structure, including a front end cover, a rear end cover, a plastic stator assembly, a rotor assembly, a front bearing and a rear bearing. The plastic stator assembly includes a stator core, a stator winding and a plastic casing. The plastic stator assembly A cavity is formed in the center, which is characterized by: the front end cover is made of non-magnetic material, the front end cover is nested at one end of the plastic shell, the front bearing is installed in the front bearing chamber of the front end cover, the rear end cover is made of metal, the rear end cover It is installed at the other end of the plastic shell. The inner wall of the rear bearing chamber inside the rear end cover is laid with an insulation layer. The rear bearing is installed inside the rear bearing chamber. The insulation layer insulates the rear bearing and the rear end cover. The rotor assembly is placed in the cavity. Inside, the shaft on the rotor assembly is mounted on front and rear bearings.
2、 根据权利要求 1所述的一种直流塑封电机结构， 其特征在于： 后端 盖是 SPCC钢材冲压件或者是铸铝件。 2. A DC plastic-sealed motor structure according to claim 1, characterized in that: the rear end cover is a SPCC steel stamping part or a cast aluminum part.
3、 根据权利要求 1或 2所述的一种直流塑封电机结构， 其特征在于： 所述的绝缘层是高强度塑钢材料制造。 3. A DC plastic motor structure according to claim 1 or 2, characterized in that: the insulation layer is made of high-strength plastic steel material.
4、 根据权利要求 3所述的一种直流塑封电机结构， 其特征在于： 前端 盖与在塑封外壳的注塑在一起。 4. A DC plastic motor structure according to claim 3, characterized in that: the front end cover is injection molded together with the plastic shell.
5、 根据权利要求 4所述的的一种直流塑封电机结构， 其特征在于： 所 述的转子组件包括永磁体、 外铁芯、 内铁芯和转轴， 转轴套装在内铁芯上， 外 铁芯、 内铁芯之间通过绝缘减震带连接， 外铁芯上安装永磁体。 5. A DC plastic motor structure according to claim 4, characterized in that: the rotor assembly includes a permanent magnet, an outer iron core, an inner iron core and a rotating shaft, the rotating shaft is sleeved on the inner iron core, and the outer iron The core and the inner iron core are connected through insulating shock-absorbing tapes, and permanent magnets are installed on the outer iron core.
6、 根据权利要求 4所述的一种直流塑封电机结构， 其特征在于： 塑封 外壳包裹住前端盖。 6. A DC plastic motor structure according to claim 4, characterized in that: the plastic shell wraps the front end cover.
7、 根据权利要求 1或 2所述的一种直流塑封电机结构， 其特征在于： 7. A DC plastic motor structure according to claim 1 or 2, characterized by:
PCT/CN2013/075060 2013-03-18 2013-05-02 Structure of direct current plastic packaging motor WO2014146338A1 (en)

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