Outer rotor assembly and motor

Abstract

The utility model belongs to the technical field of ventilation electric appliances, and relates to an outer rotor assembly which comprises a rotor body and a main shaft, the rotor body adopts magnetic materials to integrally form an annular wall and an end wall through injection molding, and a stator assembly chamber is limited on the inner sides of the annular wall and the end wall; the main shaft is fixedly connected with the end wall through injection molding; the annular wall is oriented and magnetized by a magnetic steel mold during injection molding and is provided with a magnetic pole array. The integrated structure of the ring wall and the end wall is formed through integral injection molding of the magnetic material, follow-up assembly is not needed, the economical efficiency is good, and the perpendicularity and concentricity precision of the main shaft are high. The utility model further provides a motor applying the outer rotor assembly.

Description

Technical Field

[0001] The utility model belongs to the technical field of ventilation appliances, and particularly relates to an outer rotor assembly and a motor. Background Art

[0002] The ventilation appliances related to this patent include appliances such as fans, blowers, and exhaust fans. Such appliances generally include a motor and an air flow generator (such as blades, impellers). The outer rotor motor related to this patent generally includes a stator assembly and a rotor assembly; the stator assembly includes a stator shaft seat, a main shaft hole is arranged inside the stator shaft seat, and a winding coil is installed outside the stator shaft seat; the rotor assembly includes a rotor housing, a main shaft, and a magnetic ring. The rear part of the main shaft is fixedly connected to the middle part of the rotor housing, the magnetic ring is installed inside the rotor bracket, and the front end of the main shaft passes through the stator shaft seat from the main shaft hole.

[0003] In the existing rotor assembly scheme, there are many components, the assembly process is complex, the cost is high, and the perpendicularity error of the main shaft is large. Summary of the Utility Model

[0004] The main purpose of the utility model is to solve the problems of the existing rotor assembly, such as many components, complex assembly process, high cost, and large perpendicularity error of the main shaft.

[0005] The technical solution adopted in this application is as follows: The outer rotor assembly includes a rotor body and a main shaft. The rotor body is integrally injection-molded with a magnetic material to form an annular wall and an end wall, and a stator assembly chamber is defined inside the annular wall and the end wall; the main shaft is fixedly connected to the end wall through the injection molding; the annular wall is magnetized in orientation by a magnetic steel mold during injection molding and has a magnetic pole array.

[0006] This application integrally injection-molds the annular wall and the end wall with a magnetic material to form an integrated structure, which does not require subsequent assembly, has good economy, and has high perpendicularity and concentricity accuracy of the main shaft.

[0007] Further, there are two configuration schemes for the main shaft. Scheme 1: The first end of the main shaft is fixedly connected to the end wall. Scheme 2: The first end of the main shaft passes through the end wall to form a rear bearing connection part.

[0008] Further, an air flow generating mechanism is integrally formed on the end wall. The air flow generating mechanism includes a plurality of air guide holes arranged at intervals around the rotation main axis, and a plurality of booster vanes arranged at intervals around the rotation main axis on the rotation side of each air guide hole. The plurality of booster vanes extend from the middle of the end wall to the side. The plurality of booster vanes protrude on at least one of the outer side and the inner side of the end wall. Each air guide hole is located between two adjacent booster vanes. When the outer rotor assembly rotates, the booster vanes cause external gas to enter the air guide holes. By configuring the air flow generating mechanism, when the outer rotor assembly rotates, the booster vanes can cause external gas to accelerate into the air guide holes, achieving the effect of boosting the air flow, thereby accelerating the air flow of the gas inside and outside the motor and improving the heat dissipation effect inside and outside the motor.

[0009] On the other hand, the present application provides a motor, comprising: an outer rotor assembly and a stator assembly. The outer rotor assembly has: a rotor body, with an annular wall and an end wall integrally injection-molded from a magnetic material; a main shaft, fixedly connected to the end wall through the injection molding; and during the injection molding, the magnetic material of the annular wall is directionally magnetized by a magnetic steel mold, having a magnetic pole array. The stator assembly includes an end cover housing member and a stator shaft seat disposed in the middle of the rear side of the end cover housing member. A main shaft passage communicating with the end cover housing member is provided inside the stator shaft seat. A winding coil is installed outside the stator shaft seat, and the main shaft passes through the end cover housing member from the main shaft passage.

[0010] The motor provided on the other hand by the present application includes: an outer rotor assembly, a stator assembly, a first housing member, and a second housing member. The outer rotor assembly has: a rotor body, with an annular wall and an end wall integrally injection-molded from a magnetic material; a main shaft, fixedly connected to the end wall through the injection molding; and the annular wall is directionally magnetized by a magnetic steel mold during the injection molding, having a magnetic pole array. The stator assembly includes a stator shaft seat and a winding coil. A main shaft hole communicating with the end cover housing member is provided inside the stator shaft seat; the main shaft passes through the end cover housing member from the main shaft passage. The first housing member is formed by a sheet metal process, having a first housing end wall, and a first bearing chamber integrally formed in the middle of the inner side; the second housing member, formed by a sheet metal process, having a second housing end wall, and a second bearing chamber integrally formed in the middle of the inner side. The main shaft is installed in the main shaft passage and is respectively assembled with the first bearing chamber and the second bearing chamber through a first bearing and a second bearing. An axial hole is provided in the first bearing chamber or / and the second bearing chamber, and the output end of the main shaft passes through the axial hole.

[0011] In some other embodiments of the motor, the rotor body includes an integrally injection-molded structure of an annular wall and an end wall, and at least the annular wall is injection-molded from a magnetic material.

[0012] The technical effects of the present application are more reflected in the implementation. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a perspective view of an embodiment of the outer rotor assembly of the present application

[0014] Figure 2 is a perspective view of another angle of an embodiment of the outer rotor assembly of the present application

[0015] Figure 3 is a perspective cross-sectional view of an embodiment of the outer rotor assembly of the present application

[0016] Figure 4 is a front projection view of an embodiment of the outer rotor assembly of the present application from the angle of the end wall side

[0017] Figure 5 is a perspective view of another embodiment of the outer rotor assembly of the present application

[0018] Figure 6 A perspective view of another embodiment of the outer rotor assembly of the present application from another angle

[0019] Figure 7 A perspective cross-sectional view of another embodiment of the outer rotor assembly of the present application

[0020] Figure 8 A perspective view of an embodiment of the motor of the present application

[0021] Figure 9 A perspective view of another angle of an embodiment of the motor of the present application

[0022] Figure 10 A perspective cross-sectional view of an embodiment of the motor of the present application Detailed implementation manners

[0023] Refer to Figures 1 to 10 , this patent generally relates to an outer rotor assembly and a motor

[0024] Refer to Figures 1 to 4 , an embodiment of the outer rotor assembly of the present application, includes a rotor body 1 and a main shaft 1.3, wherein the rotor body 1 is integrally injection molded from a magnetic material to form an annular wall 1.1 and an end wall 1.2, and a stator assembly chamber 100 is defined inside the annular wall 1.1 and the end wall 1.2; the main shaft 1.3 is fixedly connected to the end wall 1.2 through the injection molding; during the injection molding, the magnetic material of the annular wall 1.1 is magnetized by a magnet mold to make the annular wall 1.1 have a magnetic pole array

[0025] The present application adopts an integrated structure in which the annular wall 1.1 and the end wall 1.2 are integrally injection molded from a magnetic material, without subsequent assembly, with good economy and high verticality accuracy of the main shaft

[0026] The magnetic material and injection molding process of this application are existing. The magnetic material of this application refers to adding magnetic substances to the injection molding material. For example, after mixing ferrite magnetic powder and resin (such as PA6, PA12, PA66, PPS, etc.), it is formed through the injection molding process. Specifically, the proportion of the magnetic material is adjusted according to the required Gauss value, and this adjustment is also existing; in addition, the technical means of orientation magnetization of the magnetic material of the magnetic steel mold is also existing, such as the existing orientation magnetization of the magnetic ring through the magnetic steel mold. In this application, the main shaft 1.3 and the end wall 1.2 are fixedly connected. One way is to position the connecting part of the main shaft 1.3 into the injection mold cavity, and when the injection glue fills the injection mold cavity, it wraps the connecting part of the main shaft 1.3. This process of connecting the main shaft 1.3 and the plastic part through injection molding is existing. In order to increase the connection strength between the main shaft 1.3 and the end wall 1.2, a strengthened connection structure 1.30 can be set on the connecting part of the main shaft 1.3, including but not limited to one or more combinations of flat positions, holes or protrusions (such as pins). In order to enhance the connection strength between the end wall 1.2 and the main shaft 1.3, a boss structure 1.22 with an increased thickness can be set in the middle of the strengthened end wall 1.2.

[0027] The innovation of this application lies in integrally injecting the ring wall 1.1 and the end wall 1.2 of the rotor body 1, obtaining a magnetic pole array by orientation magnetization of the magnetic material of the ring wall 1.1 through a magnetic steel mold, and obtaining an integrated structure of the ring wall 1.1 and the end wall 1.2. Compared with the prior art, it reduces the rotor housing and assembly processes, eliminates the need for subsequent assembly, has good economy, can be achieved in the same mold, and has high spindle perpendicularity and concentricity accuracy.

[0028] The main shaft 1.3 is usually made of structural metal materials, including the first end 1.31 and the second end 1.32, and can be processed by machining, die casting, forging and other processes.

[0029] The first end 1.31 of the main shaft 1.3 is fixedly connected to the end wall 1.2. This method is usually applicable to the use environment where no additional support is added to the first end of the main shaft 1.3.

[0030] See Figures 5 to 7 , in other embodiments, the first end 1.31 of the main shaft 1.3 passes through the end wall 1.2 to form a rear bearing connection part 3.1. This method is usually applicable to the use environment where additional support is added to the first end of the main shaft 1.3.

[0031] See Figures 1 to 4, in some embodiments, an air flow generating mechanism 1.21 is integrally formed on the end wall 1.2, which includes a plurality of air guide holes 1.210 arranged at intervals around the main rotation axis, and a plurality of booster vanes 1.211 arranged at intervals around the main rotation axis on the side of the air guide holes 1.210 in the rotation direction. The plurality of booster vanes extend from the middle of the end wall 1.2 to the side. The plurality of booster vanes 1.211 protrude on at least one of the outer side and the inner side of the end wall. Each air guide hole 1.210 is located between two adjacent booster vanes 1.211. When the outer rotor assembly rotates, the booster vanes 1.211 cause external gas to enter the air guide holes 1.210. By configuring the air flow generating mechanism 1.21, when the outer rotor assembly rotates, the booster vanes 1.211 can cause external gas to accelerate into the air guide holes 1.210, achieving the effect of boosting the air flow, thereby accelerating the air flow of the external gas inside the motor and improving the heat dissipation effect inside and outside the motor.

[0032] Another implementation scheme of the outer rotor assembly of the present application is that the rotor body 1 is injection molded into an integral structure of an annular wall 1.1 and an end wall 1.2, and different materials or combined injection molding can be used for the annular wall 1.1 and the end wall 1.2. For example, the annular wall 1.1 is injection molded with a magnetic material, and the end wall 1.2 is injection molded with a material that does not contain magnetic substances. The inner sides of the annular wall 1.1 and the end wall 1.2 define a stator assembly chamber 100, and the main shaft 1.3 is fixedly connected to the end wall 1.2 through the injection molding; during injection molding, the magnetic material of the annular wall 1.1 is oriented and magnetized by a magnetic steel mold, so that the annular wall 1.1 has a magnetic pole array. In a specific embodiment, for example, the annular wall 1.1 is injection molded with ferrite magnetic powder and resin (such as PA6, PA12, PA66, PPS, etc.), and the end wall 1.2 is injection molded with resin (such as PA6, PA12, PA66, PPS, etc.). The materials of the above two parts can be injection molded into an injection mold by a two-material injection molding machine, and such injection equipment and processes are all existing. Injecting two parts with two types of materials can manufacture the rotor body 1 according to different design requirements.

[0033] See Figures 1 to 4 , on the other hand, the present application provides a motor, including: an outer rotor assembly a and a stator assembly (not shown). The outer rotor assembly a has: a rotor body 1 injection molded integrally with a magnetic material to form an annular wall 1.1 and an end wall 1.2; a main shaft 1.3 fixedly connected to the end wall 1.2 through the injection molding; the annular wall 1.1 is oriented and magnetized by a magnetic steel mold during injection molding and has a magnetic pole array. The stator assembly includes an end cover housing member and a stator shaft seat provided in the middle of the rear side of the end cover housing member. A main shaft channel communicating with the end cover housing member is provided inside the stator shaft seat, and a winding coil is installed outside the stator shaft seat. The main shaft 1.3 passes through the end cover housing member from the main shaft channel. In this embodiment, the stator assembly (not shown) is not an improvement of the present application, and the solutions disclosed in CN220857729U and CN220605639U can be referred to for understanding.

[0034] In some other embodiments, the rotor body 1 is injection-molded into an integral structure of an annular wall 1.1 and an end wall 1.2. The annular wall 1.1 is injection-molded with a magnetic material, and the end wall 1.2 is injection-molded with a material that does not contain magnetic substances; the main shaft 1.3 is fixedly connected to the end wall 1.2 through the injection molding. Specific examples of materials and processes can be found in the relevant description of the outer rotor assembly.

[0035] See Figures 5 to 7 , Figures 8 to 10 , the motor provided on the other hand of the present application includes: an outer rotor assembly a, a stator assembly 7, a first housing member 5, and a second housing member 6. The outer rotor assembly a has: a rotor body 1, which is integrally injection-molded with an annular wall 1.1 and an end wall 1.2 using a magnetic material; the main shaft 1.3 is fixedly connected to the end wall 1.2 through the injection molding; the annular wall 1.1 is oriented and magnetized by a magnetic steel mold during injection molding and has a magnetic pole array. The stator assembly 7 includes a stator shaft seat 7.2 and a winding coil 7.3. A main shaft hole 7.20 communicating with the end cover housing member 7.1 is provided inside the stator shaft seat 7.2; the main shaft 1.3 passes through the end cover housing member 7.1 from the main shaft channel 7.20. The first housing member 5 is formed by a sheet metal process and has a first housing end wall 5.1, and a first bearing chamber 50 is integrally formed in the middle of the inner side; the second housing member 6 is formed by a sheet metal process and has a second housing end wall 6.1, and a second bearing chamber 60 is integrally formed in the middle of the inner side. The main shaft 1.3 is installed in the main shaft channel 7.20 and is respectively assembled with the first bearing chamber 50 and the second bearing chamber 60 through a first bearing b1 and a second bearing b2. An axial hole b0 is provided in the first bearing chamber 50 or / and the second bearing chamber 60, and the output end of the main shaft 1.3 passes through the axial hole b0. The specific structures and assemblies of the stator assembly 7, the first housing member 5, and the second housing member 6 are not improvements of the present application.

[0036] In some other embodiments, the rotor body 1 is injection-molded into an integral structure of an annular wall 1.1 and an end wall 1.2. The annular wall 1.1 is injection-molded with a magnetic material, and the end wall 1.2 is injection-molded with a material that does not contain magnetic substances; the main shaft 1.3 is fixedly connected to the end wall 1.2 through the injection molding. Specific examples of materials and processes can be found in the relevant description of the outer rotor assembly.

[0037] The features of the outer rotor assembly and motor embodiments of the present application can be mutually referred to and combined, and all are within the protection scope of the present application.

[0038] Based on the disclosure and teachings of the above specification, those skilled in the art to which the present utility model pertains can also make changes and modifications to the above embodiments. Therefore, the present utility model is not limited to the specific embodiments disclosed and described above, and some modifications and changes to the present utility model should also fall within the protection scope of the claims of the present utility model. In addition, although some specific terms are used in this specification, these terms are only for convenience of description and do not constitute any limitation to the present utility model.

Claims

1. An outer rotor assembly, characterized in that: include: The rotor body (1) is formed by integrally injecting a magnetic material into an annular wall (1.1) and an end wall (1.2), wherein the inner sides of the annular wall (1.1) and the end wall (1.2) define a stator assembly chamber (100); A main shaft (1.3) fixedly connected to the end wall (1.2) through the injection molding; During injection molding, the magnetic material of the ring wall (1.1) is oriented and magnetized by the magnetic steel mold, so that the ring wall (1.1) has a magnetic pole array.

2. The outer rotor assembly according to claim 1, characterized in that: The first end of the main shaft (1.3) is fixedly connected to the end wall (1.2).

3. The outer rotor assembly according to claim 1, characterized in that: The first end of the main shaft (1.3) passes through the end wall (1.2) to form a rear end bearing connection portion (3.1).

4. The outer rotor assembly according to any one of claims 1 to 3, characterized in that: The end wall (1.2) is integrally formed with an airflow generating mechanism (1.21), which comprises a plurality of air guide holes (1.210) arranged at intervals around the main axis of rotation, and a plurality of booster plates (1.211) arranged at intervals around the main axis of rotation on the rotational side of each air guide hole (1.210), the plurality of booster plates extending from the middle of the end wall (1.2) to the side, the plurality of booster plates (1.211) being protrudingly formed on at least one side of the outer side and the inner side of the end wall, each air guide hole (1.210) being located between two adjacent booster plates (1.211), and the booster plates (1.211) allowing external air to enter the air guide hole (1.210) when the outer rotor assembly rotates.

5. An outer rotor assembly, characterized in that: include: A rotor body (1), an annular wall (1.1) and an end wall (1.2) of an integral injection-molded structure, wherein at least the annular wall (1.1) is injection-molded using a magnetic material; a stator assembly chamber (100) is defined inside the annular wall (1.1) and the end wall (1.2); A main shaft (1.3) fixedly connected to the end wall (1.2) through the injection molding; During injection molding, the magnetic material of the ring wall (1.1) is oriented and magnetized by the magnetic steel mold, so that the ring wall (1.1) has a magnetic pole array.

6. A motor, characterized in that include: An outer rotor assembly (a) comprises: a rotor body (1), a ring wall (1.1) and an end wall (1.2) formed by integral injection molding of a magnetic material; a main shaft (1.3), fixedly connected to the end wall (1.2) by injection molding; during injection molding, the magnetic material of the ring wall (1.1) is oriented and magnetized by a magnetic steel mold, so that the ring wall (1.1) obtains a magnetic pole array; The stator assembly comprises an end cover shell and a stator shaft seat arranged in the middle of the rear side of the end cover shell, a main shaft channel connected to the end cover shell is arranged inside the stator shaft seat, a winding coil is installed outside the stator shaft seat, and the main shaft (1.3) passes through the end cover shell from the main shaft channel.

7. A motor, characterized in that include: An outer rotor assembly (a) comprises: a rotor body (1), a ring wall (1.1) and an end wall (1.2) formed by integral injection molding of a magnetic material; a main shaft (1.3), fixedly connected to the end wall (1.2) by injection molding; during injection molding, the magnetic material of the ring wall (1.1) is oriented and magnetized by a magnetic steel mold, so that the ring wall (1.1) has a magnetic pole array; The stator assembly (7) comprises a stator shaft seat (7.2) and a winding coil (7.3); a main shaft hole (7.20) communicating with the end cover shell (7.1) is arranged inside the stator shaft seat (7.2); the main shaft (1.3) passes through the end cover shell (7.1) from the main shaft channel (7.20); A first shell component (5) is formed by a sheet metal process, and comprises a first shell end wall (5.1), and a first bearing chamber (50) is integrally formed in the middle of the inner side; The second shell component (6) is formed by a sheet metal process and comprises a second shell end wall (6.1) and a second bearing chamber (60) integrally formed in the middle of the inner side; The main shaft (1.3) is installed in the main shaft channel ((7.20)) and is assembled with the first bearing chamber (50) and the second bearing chamber (60) through the first bearing (b1) and the second bearing (b2) respectively. The first bearing chamber (50) and / or the second bearing chamber (60) are provided with an axial hole (b0), and the output end of the main shaft (1.3) passes through the axial hole (b0).

8. A motor, characterized in that include: An outer rotor assembly (a) comprises: a rotor body (1), an annular wall (1.1) and an end wall (1.2) of an integral injection-molded structure, wherein at least the annular wall (1.1) is injection-molded using a magnetic material; a main shaft (1.3) fixedly connected to the end wall (1.2) through the injection molding; during the injection molding, the magnetic material of the annular wall (1.1) is oriented and magnetized by a magnetic steel mold so that the annular wall (1.1) obtains a magnetic pole array; The stator assembly comprises an end cover shell and a stator shaft seat arranged in the middle of the rear side of the end cover shell, a main shaft channel connected to the end cover shell is arranged inside the stator shaft seat, a winding coil is installed outside the stator shaft seat, and the main shaft (1.3) passes through the end cover shell from the main shaft channel.

9. A motor, characterized in that include: An outer rotor assembly (a) comprises: a rotor body (1), an annular wall (1.1) and an end wall (1.2) of an integral injection-molded structure, wherein at least the annular wall (1.1) is injection-molded using a magnetic material; a main shaft (1.3) fixedly connected to the end wall (1.2) through the injection molding; during the injection molding, the magnetic material of the annular wall (1.1) is oriented and magnetized by a magnetic steel mold so that the annular wall (1.1) has a magnetic pole array; The stator assembly (7) comprises a stator shaft seat (7.2) and a winding coil (7.3); a main shaft hole (7.20) communicating with the end cover shell (7.1) is arranged inside the stator shaft seat (7.2); the main shaft (1.3) passes through the end cover shell (7.1) from the main shaft channel (7.20); A first shell component (5) is formed by a sheet metal process, and comprises a first shell end wall (5.1), and a first bearing chamber (50) is integrally formed in the middle of the inner side; The second shell component (6) is formed by a sheet metal process and comprises a second shell end wall (6.1) and a second bearing chamber (60) integrally formed in the middle of the inner side; The main shaft (1.3) is installed in the main shaft channel ((7.20)) and is assembled with the first bearing chamber (50) and the second bearing chamber (60) through the first bearing (b1) and the second bearing (b2) respectively. The first bearing chamber (50) and / or the second bearing chamber (60) are provided with an axial hole (b0), and the output end of the main shaft (1.3) passes through the axial hole (b0).

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