Motor

Abstract

To ensure the performance of a motor by preventing intrusion of crashed rubbish generated by a press-fitting process into a rotor part.SOLUTION: Provided is a motor including a rotor 12, a stator 11 facing the rotor in a radial direction and being positioned radially outside the rotor, and a housing 13 housing at least a portion of the rotor and at least a portion of the stator, wherein the stator includes a core 111, and a resin portion 112 covering the core, the resin portion includes a contact portion 1121 that contacts with the bottom of the housing on one side in the axis direction in the housing, the contact portion presents an annular shape when coupled on the entire circumference about a center axis, the contact portion is radially inside a radially center position of the stator, the one side in the axis direction of the stator and the housing have a gap in the axis direction, the gap forms a first space S1, and the contact portion is positioned radially inside the first space.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present application relates to the field of mechanical and electrical technology, and in particular to motors. [Background technology]

[0002] A motor typically includes a stator, a rotor, and a housing that accommodates the stator and the rotor. In an assembly operation, the stator and / or the rotor are press-fitted into the housing to achieve assembly.

[0003] In an inner rotor motor, when the stator core is press-fitted into the housing, debris generated during the press-fitting process may enter the rotor portion and then be scattered as the rotor rotates, which may affect the performance of the motor.

[0004] It should be noted that the above description of the technical background is merely provided to facilitate a clear and complete description of the technical methods of the present application and to facilitate the understanding of those skilled in the art, and the above technical methods should not be deemed to be publicly known to those skilled in the art merely because they are described in the background section of the present application. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Chinese Patent No. 111247723 Summary of the Invention [Problem to be solved by the invention]

[0006] To address at least one of the above problems or other similar problems, embodiments of the present application provide a motor that can prevent debris from entering the rotor and ensure motor performance. [Means for solving the problem]

[0007] According to an embodiment of the present application, there is provided a motor comprising: a rotor; a stator radially facing the rotor and positioned radially outside the rotor; and a housing accommodating at least a part of the rotor and at least a part of the stator, wherein the stator comprises a core and a resin part covering the core, the resin part comprises an abutment part at one axial side thereof that abuts against a bottom part of the housing within the housing, the abutment part being connected around the entire circumference of a central axis to assume an annular shape, the abutment part being radially inward of a radial center position of the stator, a gap being formed in the axial direction between the one axial side of the stator and the housing, the gap forming a first space, and the abutment part being positioned radially inside the first space.

[0008] In one or more embodiments, the first space extends radially outward from the abutment portion to an edge of the housing.

[0009] In one or more embodiments, a second space is formed radially between the stator and the housing, the second space is located on one axial side of the back yoke of the core, and the second space is connected to the first space.

[0010] In one or more embodiments, the abutment portion abuts against the bottom of the housing via a seal ring arranged on one side of the resin portion in the axial direction.

[0011] In one or more embodiments, the resin portion includes an insulating part and a molded resin molded on one axial side of the insulating part, and the abutment portion is integrally molded with the molded resin.

[0012] In one or more embodiments, the molding resin further has a third space recessed on one side in the axial direction toward the other side in the axial direction, the third space communicating with the first space.

[0013] In one or more embodiments, the insulating component includes a yoke portion located radially outward, and the third space is located radially inward of the yoke portion of the insulating component.

[0014] In one or more embodiments, the third space is located on one axial side of the insulating component.

[0015] In one or more embodiments, a bottom radially outer edge of the housing has an aperture extending through the housing.

[0016] In one or more embodiments, the abutment portion is radially inward from an outer diameter of the rotor. Effect of the Invention

[0017] One of the beneficial effects of the embodiment of the present application is that the resin part of the stator has an abutment part that abuts against the bottom of the housing inside the housing, the abutment part is connected around the entire circumference of the central axis to form an annular shape, and the abutment part is located radially inside the first space formed in the axial direction by the stator and the housing. This allows debris generated when the stator is pressed into the first space to be contained, and the abutment part blocks the debris from entering the rotor, thereby ensuring the performance of the motor. [Brief description of the drawings]

[0018] [Figure 1] FIG. 1 is a schematic diagram of one embodiment of a motor according to the present application. [Diagram 2] FIG. 2 is another schematic diagram of a motor according to an embodiment of the present application. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0019] With reference to the following description and drawings, certain embodiments of the present application are disclosed in detail, demonstrating the manner in which the principles of the present application may be employed. It is to be understood that the embodiments of the present application are not limited thereto in scope. The embodiments of the present application include many changes, modifications and equivalents within the spirit and terms of the appended claims.

[0020] Features described and / or shown in one embodiment may be used in the same or similar manner in one or more other embodiments, may be combined with features in the other embodiments, or may be substituted for features in the other embodiments.

[0021] Elements and features described in one drawing or one embodiment of the present application may be combined with elements and features shown in one or more other drawings or embodiments, and in the drawings, like reference numerals represent corresponding parts in the several drawings and may be used to refer to corresponding parts used in more than one embodiment.

[0022] The included drawings are used to provide further understanding of the embodiments of the present application, constitute a part of the specification, are used to illustrate the embodiments of the present application, and together with the written description, explain the principles of the present application. Of course, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can obtain other drawings based on these drawings without performing creative labor.

[0023] The above and other features of the embodiments of the present application will become apparent from the following description with reference to the drawings. In the following description and drawings, certain embodiments of the embodiments of the present application are specifically disclosed, and some embodiments of the principles of the embodiments of the present application can be adopted therein, and it should be understood that the embodiments of the present application are not limited to the described embodiments, but on the contrary, the embodiments of the present application include all modifications, variations and equivalents falling within the scope of the appended claims.

[0024] In the embodiments of the present application, the term "and / or" includes any and all combinations of one or more of the associated listed terms. Terms such as "including," "comprising," "having," and the like refer to the presence of stated features, elements, parts, or assemblies, but do not exclude the presence or addition of one or more other features, elements, parts, or assemblies.

[0025] In the embodiments of the present application, the singular forms "a," "the," and the like may include the plural and should be understood broadly as "a kind" or "a type of," and are not limited to the meaning of "one," and the term "said" should be understood to include both the singular and the plural, unless the context clearly indicates otherwise. Additionally, the term "based on" should be understood to mean "based at least in part on," and the term "based on" should be understood to mean "based at least in part on," unless the context clearly indicates otherwise.

[0026] In the embodiments of the present application, for convenience of explanation, the central axis OO' of the motor or a direction parallel to it is referred to as the "axial direction", the radial direction around the axis is referred to as the "radial direction", and the direction surrounding the axis is referred to as the "circumferential direction", but this is merely for convenience of explanation and does not limit the orientation of the motor during use and manufacture.

[0027] Various embodiments of the present application will be described below with reference to the drawings. These embodiments are merely illustrative and are not intended to be limiting of the present application.

[0028] An embodiment of the present application provides a motor.

[0029] FIG. 1 is a schematic diagram of a motor 10 according to an embodiment of the present application, showing a schematic axial cross-sectional view of the motor 10 cut along a central axis OO'.

[0030] 1, the motor 10 includes a stator 11, a rotor 12, and a housing 13. The stator 11 faces the rotor 12 in the radial direction 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 may be an inner rotor motor.

[0031] As shown in FIG. 1, the stator 11 includes a core 111 and a resin part 112 that covers the core 111 .

[0032] As shown in FIG. 1, the resin part 112 has a contact part 1121 on one axial side thereof that contacts the bottom part 131 of the housing 13 inside the housing 13 .

[0033] In the embodiment of the present application, the abutment portion 1121 is connected around the entire circumference of the central axis OO' and has an annular shape. The abutment portion 1121 is located radially inward of the radial center position of the stator 11, and the radial center position of the stator 11 here refers to the radial center position of a stator portion located on one side of the central axis OO' (the left or right side of the central axis OO' on the page of FIG. 1) in the axial cross section shown in FIG.

[0034] As shown in FIG. 1, there is a gap in the axial direction between one axial side (O' side) of the stator 11 and the housing 13, the gap forming a first space S1, and the abutment portion 1121 is located radially inside the first space S1.

[0035] From the above embodiment, it can be seen that the resin part 112 of the stator 11 has an abutment part 1121 that abuts against the bottom part 131 of the housing 13 inside the housing 13 on one side in the axial direction, the abutment part 1121 is connected around the entire circumference of the central axis OO' to present an annular shape, and the abutment part 1121 is located radially inside the first space S1 formed in the axial direction by the stator 11 and the housing 13. This makes it possible to accommodate debris generated when the stator 11 is pressed into the first space S1, and the abutment part 1121 blocks the debris from entering the rotor 12, thereby ensuring the performance of the motor.

[0036] Furthermore, the abutment portion 1121 is radially inward from the radial center position of the stator 11, thereby ensuring that the first space S1 has a sufficient radial size, and further securing space for accommodating debris.

[0037] 1, in one or more embodiments, the first space S1 extends radially outward from the abutment portion 1121 to an edge of the housing 13, so that the first space S1 has sufficient space to accommodate debris. However, the present application is not limited thereto, and for example, the first space S1 does not have to extend to the edge of the housing 13.

[0038] As shown in FIG. 1, in one or more embodiments, a second space S2 is formed radially between the stator 11 and the housing 13, 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.

[0039] In an embodiment of the present application, the stator core may have a plurality of teeth extending radially and a cylindrical back yoke located radially outside the teeth, in other words, the back yoke is an outer peripheral portion of the core, and reference may be made to related art regarding the structure of the stator core.

[0040] This allows the debris generated when the core is pressed in to pass through the second space S2 and fall into the first space S1, and the first space S1 also expands the storage space.

[0041] 1, in one or more embodiments, the resin part 112 includes an insulating part 1122 and a molded resin 1123 molded on one axial side (O' side) of the insulating part 1122, and the abutting part 1121 is integrally molded with the molded resin 1123. This allows the abutting part to be directly molded by the molded resin, eliminating the need for an additional processing step and simplifying the molding.

[0042] In the embodiment of the present application, an insulating part 1122 for insulation is provided between the stator core and the coil, and the resin part 112 includes the insulating part 1122, and the resin part further includes molded resin 1123 provided on one axial side (O' side) of the insulating part 1122, and the abutment part 1121 is provided on the molded resin 1123.

[0043] In one or more embodiments, the molding resin 1123 and the abutment portion 1121 can be molded as a single piece, which can simplify molding, i.e., after the core is created, the core is positioned in the mold, and the molding resin and the abutment portion are molded as a single piece by molding.

[0044] However, the present application is not limited to this, and for example, any one of the insulating part 1122, the molded resin 1123, and the abutment part 1121 may be independently molded and then assembled, and the present application is not limited thereto.

[0045] As shown in FIG. 1, in one or more embodiments, the molding resin 1123 further has a third space S3 on one axial side (O' side) recessed toward the other axial side (O side), and the third space S3 is connected to the first space S1.

[0046] This allows the third space S3 to further increase the size of the debris storage space.

[0047] For example, when the motor 10 is attached to the bottom 131 of the housing 13 by providing a fixing member that penetrates the bottom, the fixing member may be, for example, a screw, and any debris generated in the process of attaching the fixing member may be contained in the third space S3. Also, when the fixing member penetrates the bottom 131 and protrudes from the inside of the bottom 131 of the housing, the protruding part may be contained within the third space S3, thereby preventing the fixing member from interfering with other components inside the motor.

[0048] In the embodiment of the present application, the first space S1, the second space S2, and the third space S3 may all have a shape that extends along the circumferential direction and covers the entire circumference, but the present application is not limited to this, and for example, the second space S2 may be multiple spaces spaced apart in the circumferential direction, and the third space S3 may also be multiple spaces spaced apart in the circumferential direction, and the present application does not impose any limitations on this, and specific embodiments can be determined according to actual needs.

[0049] 1, in one or more embodiments, the insulating part 1122 includes a yoke part 1124 located radially outward, and the third space S3 is located radially inward of the yoke part 1124 of the insulating part 1122. This makes it possible to prevent the third space S3 from interfering with the yoke part of the insulating part.

[0050] However, the present application is not limited to this, and the third space S3 may partially overlap with the yoke portion 1124 in the axial direction.

[0051] In one or more embodiments, the third space S3 is located on one side of the insulating component in the axial direction, thereby preventing the third space from interfering with the insulating component 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 insulating component in the axial direction, thereby preventing interference.

[0052] However, the present application is not limited thereto. For example, the third space and the insulating component may have an overlapping portion when viewed in the radial direction.

[0053] In one or more embodiments, the radially outer edge of the bottom 131 of the housing 13 has a hole extending through the housing 13 to facilitate the evacuation of debris generated during press-fit of the stator.

[0054] In the embodiment of the present application, the specific shape of the hole is not limited, and for example, the hole may have a shape in which the hole diameter of the part facing the inside of the housing is larger than the hole diameter of the part facing the outside of the housing, which is convenient for preventing foreign objects from entering the inside of the housing even when debris is discharged. However, the present application is not limited thereto, and the hole may have another shape.

[0055] In the embodiments of the present application, there is no limitation on the number of holes, the number of holes may be multiple, and the multiple holes may be arranged at equal or uneven intervals along the circumferential direction, and the present application does not impose any limitation on this.

[0056] 1, in one or more embodiments, the abutment portion 1121 is radially inward from the outer diameter of the rotor 12. This allows a labyrinth structure to be formed between the resin portion 112, the housing 13, and the rotor 12, further preventing debris from entering the rotor.

[0057] However, the present application is not limited thereto. For example, the abutment portion 1121 may be aligned radially with the outer diameter of the rotor 12 or may be radially outward of the outer diameter of the rotor 12. In the embodiment of the present application, as shown in FIG. 1, the abutment portion 1121 may directly abut against the bottom 131 of the housing 13, but the present application is not limited thereto, and the abutment portion may indirectly abut against the bottom of the housing.

[0058] FIG. 2 is another schematic diagram of a motor according to an embodiment of the present application, showing how the abutment portion indirectly abuts against the bottom of the housing.

[0059] As shown in FIG. 2, in one or more embodiments, the contact portion 1121′ contacts the bottom 131 of the housing 13 via the seal ring 14 arranged on one axial side (O′ side) of the resin portion 112.

[0060] This allows contact to be made via the seal ring, which on the one hand makes the contact more reliable, and on the other hand, the elasticity of the seal ring prevents strong interference with the bottom of the housing when the stator is pressed in, thereby increasing design freedom.

[0061] In one or more embodiments, a groove may be formed at an end of one axial side (O' side) of the resin part 112 to accommodate at least a portion of the seal ring 14, thereby preventing the seal ring 14 from coming off and ensuring the sealing effect.

[0062] It is worth noting that, although the above Figures 1 and 2 merely provide a schematic explanation of the motor of the embodiment of the present application, the present application is not limited thereto, and the specific contents of each structure or member may refer to the related art, and structures or members not shown in Figures 1 and 2 may be added, or one or more structures or members in Figures 1 and 2 may be removed. Members or elements not specifically shown in Figures 1 and 2, for example, the motor, may include bearings, etc., and may refer to the related art, and the present application does not impose any limitations thereon.

[0063] From the above embodiment, it can be seen that the resin part of the stator has an abutment part that abuts against the bottom of the housing inside the housing, the abutment part is connected around the entire circumference of the central axis to form an annular shape, and the abutment part is located radially inside the first space formed in the axial direction by the stator and the housing. This makes it possible to contain debris generated when the stator is pressed into the first space, and the abutment part blocks the debris from entering the rotor, ensuring the performance of the motor.

[0064] Although the embodiments of the present application have been described above with reference to specific embodiments, those skilled in the art should clearly understand that these descriptions are merely illustrative and do not limit the scope of protection of the embodiments of the present application. Those skilled in the art can make various modifications and alterations to the embodiments of the present application based on the spirit and principles of the embodiments of the present application, and these modifications and alterations are also within the scope of the embodiments of the present application.

[0065] The preferred embodiments of the present application have been described above with reference to the drawings. Many features and advantages of these embodiments are apparent from the detailed description, and 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 those skilled in the art can easily think of many modifications and changes, the embodiments of the present application are not limited to the exact structure and operation illustrated and described, but can include all appropriate modifications and equivalents that fall within the scope thereof. [Explanation of symbols]

[0066] 10...motor, 11...stator, 12...rotor, 13...housing, 14...seal ring, 111...core, 112...resin part, 131...bottom, 1111...back yoke, 1121, 1121'...contact part, 1122...insulating part, 1123...molded resin, 1124...yoke part, OO'...center axis, S1...first space, S2...second space, S3...third space

Claims

1. In the motor, A rotor; a stator positioned radially outward of the rotor and facing the rotor in the radial direction; a housing that accommodates at least a portion of the rotor and at least a portion of the stator; Equipped with The stator includes a core and a resin portion covering the core. the resin portion includes an abutment portion at one side in the axial direction that abuts against a bottom portion of the housing within the housing, the abutment portion being connected around the entire circumference of the central axis to form an annular shape, the abutment portion is located radially inward of a radial center position of the stator, a gap is provided between one axial side of the stator and the housing in the axial direction, the gap forming a first space; The motor is characterized in that the abutment portion is located radially inside the first space.

2. The motor according to claim 1 , wherein the first space extends radially outward from the contact portion to an edge of the housing.

3. The motor according to claim 1 or 2, characterized in that a second space is formed between the stator and the radial direction of the housing, the second space is located on one side of the axial direction of the back yoke of the core, and the second space is connected to the first space.

4. 2. The motor according to claim 1, wherein the contact portion contacts the bottom of the housing via a seal ring disposed on one side of the resin portion in the axial direction.

5. The resin portion includes an insulating part and a molded resin molded on one side of the insulating part in an axial direction, 2. The motor according to claim 1, wherein the contact portion is integrally formed with the molding resin.

6. 6. The motor according to claim 5, wherein the molded resin further has a third space recessed on one side in the axial direction toward the other side in the axial direction, the third space communicating with the first space.

7. The motor according to claim 6 , wherein the insulating component includes a yoke portion located radially outward, and the third space is located radially inward of the yoke portion of the insulating component.

8. The motor according to claim 6 , wherein the third space is located on one axial side of the insulating part.

9. 2. The motor of claim 1, wherein a radially outer edge of a bottom of the housing has a hole extending therethrough.

10. The motor according to claim 1 , wherein the contact portion is located radially inward from an outer diameter of the rotor.

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