Motor
By designing a structure in which the resin part is ring-shaped to abut the bottom of the casing in the motor, multiple spaces are formed to accommodate debris, which solves the problem of debris entering the rotor when the stator core is pressed, and ensures the stability of motor performance sex.
Patent Information
- Application Number
- CN202310728466.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-06-19
- Publication Date
- 2024-12-20
AI Technical Summary
During the assembly process of the inner rotor motor, the debris generated when the stator core is pressed into the casing can easily invade the rotor, affecting the motor performance.
A motor is designed in which the resin portion of the stator abuts annularly in the case in the case bottom to form a first space to accommodate debris, and expands the accommodation space through the second and third spaces to ensure that debris does not Invade the rotor.
Effectively prevent debris from invading the rotor and ensure the stability and reliability of motor performance.
Smart Images
Figure CN119171681A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of electromechanical technology, and in particular to a motor. Background Art
[0002] The motor generally includes a stator, a rotor and a casing for accommodating the stator and the rotor. During the assembly operation, the stator and / or the rotor are pressed into the casing to achieve assembly.
[0003] In an inner rotor motor, when the stator core is pressed into the housing, the debris generated during the pressing process will invade the rotor part and then fly away as the rotor rotates, affecting the motor performance.
[0004] It should be noted that the above introduction to the technical background is only for the convenience of providing a clear and complete description of the technical solutions of the present application and for the convenience of understanding by those skilled in the art. It cannot be considered that the above technical solutions are well known to those skilled in the art simply because they are described in the background technology section of the present application. Summary of the invention
[0005] In order to solve at least one of the above problems or other similar problems, an embodiment of the present application provides a motor that can prevent debris from invading the rotor and ensure motor performance.
[0006] According to an embodiment of the present application, a motor is provided, the motor comprising:
[0007] Rotor;
[0008] a stator, which is radially opposed to the rotor and located radially outside the rotor; and
[0009] a casing accommodating at least a portion of the rotor and at least a portion of the stator,
[0010] The stator includes an iron core and a resin portion covering the iron core.
[0011] The resin portion includes an abutment portion that abuts against the bottom of the housing in the housing on one axial side, and the abutment portion is connected in a ring shape around the entire circumference of the central axis.
[0012] The abutment portion is located radially inward of the radial center of the stator.
[0013] There is a gap between one axial side of the stator and the housing in the axial direction, and the gap forms a first space.
[0014] The abutting portion is located radially inward of the first space.
[0015] In one or more embodiments,
[0016] The first space extends radially outward from the abutting portion to an edge of the housing.
[0017] In one or more embodiments,
[0018] A second space is formed between the stator and the housing in radial directions. The second space is located on one axial side of the back yoke of the core. The second space is communicated with the first space.
[0019] In one or more embodiments,
[0020] The abutting portion abuts against the housing bottom via a seal ring disposed on one axial side of the resin portion.
[0021] In one or more embodiments,
[0022] The resin portion includes an insulating member and a molding resin molded on one axial side of the insulating member.
[0023] The contact portion is integrally formed with the molding resin.
[0024] In one or more embodiments,
[0025] The molded resin further includes a third space on the one side in the axial direction and recessed toward the other side in the axial direction, and the third space is communicated with the first space.
[0026] In one or more embodiments,
[0027] The insulating member includes a yoke portion located on the radially outer side, and the third space is located on the radially inner side of the yoke portion of the insulating member.
[0028] In one or more embodiments,
[0029] The third space is located on one axial side of the insulating member.
[0030] In one or more embodiments,
[0031] The radial outer edge of the bottom of the housing has a hole portion penetrating the housing.
[0032] In one or more embodiments,
[0033] The abutment portion is located radially inward of the outer diameter of the rotor.
[0034] One of the beneficial effects of the embodiment of the present application is that the resin part of the stator includes an abutment part that abuts against the bottom of the housing in the housing, the abutment part is connected in a ring shape around the central axis, and the abutment part is located radially inside the first space formed by the stator and the housing in the axial direction. As a result, the debris generated when the stator is pressed in can be accommodated in the first space and blocked by the abutment part outside the rotor, which can prevent the debris from invading the rotor and ensure the motor performance.
[0035] With reference to the following description and accompanying drawings, the specific embodiments of the present application are disclosed in detail, indicating the way in which the principles of the present application can be adopted. It should be understood that the embodiments of the present application are not limited in scope. Within the scope of the spirit and clauses of the appended claims, the embodiments of the present application include many changes, modifications and equivalents.
[0036] Features described and / or illustrated with respect to one embodiment may be used in the same or similar manner in one or more other embodiments, combined with features in other embodiments, or substituted for features in other embodiments. BRIEF DESCRIPTION OF THE DRAWINGS
[0037] The elements and features described in one figure or one implementation of the present application embodiment may be combined with the elements and features shown in one or more other figures or implementations. In addition, in the accompanying drawings, similar reference numerals represent corresponding parts in several figures and can be used to indicate corresponding parts used in more than one implementation.
[0038] The included drawings are used to provide a further understanding of the embodiments of the present application, which constitute a part of the specification, are used to illustrate the implementation methods of the present application, and together with the text description, explain the principles of the present application. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:
[0039] Figure 1 is a schematic diagram of a motor according to an embodiment of the present application;
[0040] Figure 2 is another schematic diagram of the motor according to an embodiment of the present application. DETAILED DESCRIPTION
[0041] With reference to the accompanying drawings, the foregoing and other features of the embodiments of the present application will become apparent through the following description. In the following description and drawings, specific implementations of the embodiments of the present application are specifically disclosed, which show some implementations in which the principles of the embodiments of the present application can be adopted. It should be understood that the embodiments of the present application are not limited to the described implementations. On the contrary, the embodiments of the present application include all modifications, variations and equivalents that fall within the scope of the attached claims.
[0042] In the embodiments of the present application, the term "and / or" includes any one and all combinations of one or more of the associated listed terms. The terms "include", "comprises", "has", etc. refer to the existence of the stated features, elements, components or components, but do not exclude the existence or addition of one or more other features, elements, components or components.
[0043] In the embodiments of the present application, the singular forms "a", "the", etc. may include plural forms and should be broadly understood as "a kind" or "a type" rather than being limited to the meaning of "one"; in addition, the term "said" should be understood to include both singular and plural forms, unless the context clearly indicates otherwise. In addition, the term "according to" should be understood as "at least in part according to...", and the term "based on" should be understood as "at least in part based on...", unless the context clearly indicates otherwise.
[0044] In the embodiments of the present application, for the convenience of explanation, the central axis OO' of the motor or the direction parallel to it is called "axial", the radial direction centered on the axis is called "radial", and the direction around the axis is called "circumferential", but this is only for the convenience of explanation and does not limit the orientation of the motor during use and manufacturing.
[0045] Various implementations of the embodiments of the present application are described below in conjunction with the accompanying drawings. These implementations are only exemplary and are not intended to limit the embodiments of the present application.
[0046] An embodiment of the present application provides a motor.
[0047] Figure 1 1 is a schematic diagram of the motor 10 according to the embodiment of the present application, showing an axial cross-section schematic diagram of the motor 10 observed along the central axis OO'.
[0048] like Figure 1 As shown, the motor 10 includes a stator 11, a rotor 12 and a housing 13. The stator 11 is radially opposite to the rotor 12 and is located radially outside the rotor 12, and the housing 13 accommodates at least a portion of the rotor 12 and at least a portion of the stator 11. That is, in the embodiment of the present application, the motor 10 can be an inner rotor motor.
[0049] like Figure 1As shown, the stator 11 includes an iron core 111 and a resin portion 112 covering the iron core 111 .
[0050] like Figure 1 As shown, the resin portion 112 includes a contact portion 1121 that contacts the bottom portion 131 of the housing 13 on one axial side within the housing 13 .
[0051] In the embodiment of the present application, the abutment portion 1121 is connected in a ring shape around the central axis OO'. The abutment portion 1121 is radially inner than the radial center of the stator 11, wherein the radial center of the stator 11 refers to the position of the stator 11. Figure 1 In the axial section shown, on one side of the central axis OO' ( Figure 1 The radial center position of the stator part (to the left or right of the central axis OO' of the page).
[0052] like Figure 1 As shown, there is a gap between one axial side (O′ side) of the stator 11 and the housing 13 in the axial direction, the gap forms a first space S1 , and the abutting portion 1121 is located radially inside the first space S1 .
[0053] As can be seen from the above embodiment, the resin portion 112 of the stator 11 includes an abutting portion 1121 that abuts against the bottom 131 of the housing 13 in the housing 13 on one side of the axial direction, and the abutting portion 1121 is connected in a ring shape around the entire circumference of the central axis OO', and the abutting portion 1121 is located radially inside the first space S1 formed in the axial direction by the stator 11 and the housing 13. As a result, the debris generated when the stator 11 is pressed in can be accommodated in the first space S1 and is shielded from the outside of the rotor 12 by the abutting portion 1121, which can prevent the debris from invading the rotor 12 and ensure the motor performance.
[0054] Furthermore, the contact portion 1121 is located radially inward of the radial center of the stator 11 , thereby ensuring that the first space S1 has a sufficient radial dimension, and further ensuring a space for accommodating the debris.
[0055] like Figure 1 As shown, in one or more embodiments, the first space S1 extends radially outward from the abutment portion 1121 to the edge of the housing 13, so that the first space S1 has enough space to accommodate debris. However, the present application is not limited thereto, for example, the first space S1 may not extend to the edge of the housing 13.
[0056] like Figure 1 As shown, in one or more embodiments, a second space S2 is formed between the stator 11 and the housing 13 in radial direction, the second space S2 is located on one axial side (O' side) of the back yoke 1111 of the core 111, and the second space S2 is connected to the first space S1.
[0057] In an embodiment of the present application, the stator core may include a plurality of radially extending teeth and a cylindrical back yoke located radially outside the teeth. In other words, the back yoke is the peripheral portion of the core. In addition, the structure of the stator core may also refer to relevant technologies.
[0058] Thus, the debris generated when the core is pressed in can fall into the first space S1 through the second space S2, and the accommodation space is expanded through the first space S1.
[0059] like Figure 1 As shown, in one or more embodiments, the resin portion 112 includes an insulating member 1122 and a molding resin 1123 molded on one axial side (O' side) of the insulating member 1122, and the abutting portion 1121 is integrally molded with the molding resin 1123. Thus, the abutting portion can be directly molded by the molding resin without the need for an additional processing process, thereby simplifying the molding.
[0060] In the embodiment of the present application, an insulating member 1122 for insulation is arranged between the stator core and the coil, and the resin portion 112 includes the insulating member 1122. In addition, the resin portion also includes a molded resin 1123 arranged on one axial side (O' side) of the insulating member 1122, and the abutment portion 1121 is arranged on the molded resin 1123.
[0061] In one or more embodiments, the molding resin 1123 and the abutment portion 1121 can be integrally formed, thereby simplifying the molding. That is, after the iron core is manufactured, the iron core is positioned in the mold, and the molding resin and the abutment portion are integrally formed by molding.
[0062] However, the present application is not limited thereto. For example, any one of the insulating member 1122 , the molding resin 1123 , and the abutting portion 1121 may be independently molded and then assembled, and the present application does not impose any limitation thereto.
[0063] like Figure 1 As shown, in one or more embodiments, the molded resin 1123 further has a third space S3 on one axial side (O' side) that is recessed toward the other axial side (O side), and the third space S3 is communicated with the first space S1.
[0064] Thus, the size of the debris accommodating space can be further increased through the third space S3.
[0065] For example, when a fixing component that passes through the bottom 131 of the casing 13 is provided to install the motor 10, the fixing component is, for example, a screw, etc., and debris generated during the installation of the fixing component can be accommodated in the third space S3. In addition, when the fixing component passes through the bottom 131 and protrudes from the inner side of the bottom 131 of the casing, the protruding part can be accommodated in the third space S3 to avoid interference between the fixing component and other components inside the motor.
[0066] In the embodiment of the present application, the first space S1, the second space S2 and the third space S3 can all be shapes extending along the circumferential direction and covering the entire circumference, but the present application is not limited to this. For example, the second space S2 can be a plurality of spaces arranged at circumferential intervals, and the third space S3 can also be a plurality of spaces arranged at circumferential intervals. The present application does not impose any restrictions on this, and the specific implementation method can be determined according to actual needs.
[0067] like Figure 1 As shown, in one or more embodiments, the insulating member 1122 includes a yoke 1124 located radially outward, and the third space S3 is located radially inward of the yoke 1124 of the insulating member 1122. Thus, the third space S3 can be prevented from interfering with the yoke of the insulating member.
[0068] However, the present application is not limited thereto, and the third space S3 may also partially overlap with the yoke 1124 in the axial direction.
[0069] In one or more embodiments, the third space S3 is located on one side of the insulator in the axial direction, thereby preventing the third space from interfering with the insulator and the coil of the stator core. That is, the molding resin 1123 has a sufficient size in the axial direction to form the third space S3, so that the third space S3 can be located on one side of the insulator in the axial direction, thereby preventing interference.
[0070] However, the present application is not limited thereto. For example, when viewed from the radial direction, the third space and the insulating member may also have overlapping portions.
[0071] In one or more embodiments, the radially outer edge of the bottom 131 of the housing 13 has a hole portion penetrating the housing 13. This facilitates the discharge of debris generated when the stator is pressed in.
[0072] In the embodiment of the present application, there is no limitation on the specific shape of the hole portion. For example, the hole portion may be shaped such that the hole diameter toward the inner side of the housing is larger than the hole diameter toward the outer side of the housing. Thus, it is convenient to discharge debris and prevent external impurities from entering the housing. However, the present application is not limited thereto, and the hole portion may also be shaped in other ways.
[0073] In the embodiments of the present application, there is no restriction on the number of hole portions, and the number of hole portions may be multiple, and the multiple hole portions may be arranged at equal or unequal intervals along the circumferential direction, and the present application does not impose any restriction on this.
[0074] like Figure 1 As shown, in one or more embodiments, the abutment portion 1121 is radially inward relative to the outer diameter of the rotor 12. Thus, a labyrinth structure can be formed between the resin portion 112, the housing 13, and the rotor 12, which can further prevent debris from invading the rotor.
[0075] However, the present application is not limited thereto. For example, the abutment portion 1121 may be radially aligned with the outer diameter of the rotor 12 or radially outward of the outer diameter of the rotor 12 .
[0076] In the embodiments of the present application, Figure 1 As shown, the abutting portion 1121 may directly abut against the bottom 131 of the housing 13 , but the present application is not limited thereto, and the abutting portion may also indirectly abut against the bottom of the housing.
[0077] Figure 2 It is another schematic diagram of the motor according to the embodiment of the present application, showing the situation where the abutting portion is indirectly connected to the bottom of the casing.
[0078] like Figure 2 As shown, in one or more embodiments, the abutting portion 1121 ′ abuts against the bottom 131 of the housing 13 through the sealing ring 14 disposed on one axial side (O′ side) of the resin portion 112 .
[0079] Thus, the abutment by the sealing ring makes the abutment more reliable on the one hand, and on the other hand, the elasticity of the sealing ring prevents hard interference with the bottom of the casing when the stator is pressed in, thereby improving the design freedom.
[0080] In one or more embodiments, a groove may be formed at the end of one axial side (O′ side) of the resin portion 112 to accommodate at least a portion of the sealing ring 14 , thereby preventing the sealing ring 14 from falling out and ensuring a sealing effect.
[0081] It is worth noting that the above Figure 1 to Figure 2 The motor of the embodiment of the present application is only schematically described, but the present application is not limited thereto. The specific contents of each structure or component can also refer to the relevant technology; in addition, Figure 1 to Figure 2 Structures or components not shown, or reduced Figure 1 to Figure 2 One or more structures or components. Figure 1 to Figure 2 For components or elements not specifically specified, such as a motor may also include bearings, etc., reference may be made to the relevant technology, and this application does not limit this.
[0082] As can be seen from the above embodiment, the resin portion of the stator includes an abutment portion that abuts against the bottom of the housing in the housing, the abutment portion is connected in a ring shape around the central axis, and the abutment portion is located radially inside the first space formed by the stator and the housing in the axial direction. As a result, the debris generated when the stator is pressed in can be accommodated in the first space and blocked by the abutment portion outside the rotor, which can prevent the debris from invading the rotor and ensure the motor performance.
[0083] The embodiments of the present application are described above in conjunction with specific implementation methods, but it should be clear to those skilled in the art that these descriptions are exemplary and are not intended to limit the scope of protection of the embodiments of the present application. Those skilled in the art can make various modifications and variations to the embodiments of the present application based on the spirit and principles of the embodiments of the present application, and these modifications and variations are also within the scope of the embodiments of the present application.
[0084] The preferred embodiments of the present application are described above with reference to the accompanying drawings. Many features and advantages of these embodiments are clear from this detailed description, and therefore the appended claims are intended to cover all such features and advantages of these embodiments that fall within their true spirit and scope. In addition, since many modifications and changes are easily conceivable to those skilled in the art, it is not intended to limit the embodiments of the present application to the precise structures and operations illustrated and described, but all suitable modifications and equivalents that fall within its scope may be covered.
Claims
1. A motor, It is characterized in that The motor comprises: Rotor; a stator, which is radially opposed to the rotor and located radially outside the rotor; and a casing accommodating at least a portion of the rotor and at least a portion of the stator, The stator includes an iron core and a resin portion covering the iron core. The resin portion includes an abutment portion that abuts against the bottom of the housing in the housing on one axial side, and the abutment portion is connected in a ring shape around the entire circumference of the central axis. The abutment portion is located radially inward of the radial center of the stator. There is a gap between one axial side of the stator and the housing in the axial direction, and the gap forms a first space. The abutting portion is located radially inward of the first space.
2. The motor according to claim 1, It is characterized in that The first space extends radially outward from the abutting portion to an edge of the housing.
3. The motor according to claim 1 or 2, It is characterized in that A second space is formed between the stator and the housing in radial directions. The second space is located on one axial side of the back yoke of the core. The second space is communicated with the first space.
4. The motor according to claim 1, It is characterized in that The abutting portion abuts against the housing bottom via a seal ring disposed on one axial side of the resin portion.
5. The motor according to claim 1, It is characterized in that The resin portion includes an insulating member and a molding resin molded on one axial side of the insulating member. The contact portion is integrally formed with the molding resin.
6. The motor according to claim 5, It is characterized in that The molded resin further includes a third space on the one side in the axial direction and recessed toward the other side in the axial direction, and the third space is communicated with the first space.
7. The motor according to claim 6, It is characterized in that The insulating member includes a yoke portion located on the radially outer side, and the third space is located on the radially inner side of the yoke portion of the insulating member.
8. The motor according to claim 6, It is characterized in that The third space is located on one axial side of the insulating member.
9. The motor according to claim 1, It is characterized in that The radial outer edge of the bottom of the housing has a hole portion penetrating the housing.
10. The motor according to claim 1, It is characterized in that The abutment portion is located radially inward of the outer diameter of the rotor.