Motor

Abstract

The embodiment of the invention provides a motor. The motor comprises a stator and a casing accommodating the stator, the casing comprises a bottom, and the bottom is provided with a through hole. A wall part is arranged between the stator and the bottom of the housing, the stator and the through hole are communicated through the wall part, and the inner area of the wall part and the outer area of the wall part are not communicated. According to the embodiment of the invention, burrs generated in the process of pressing the stator into the casing can be prevented from flowing out of the motor, a burr glue coating process is omitted, the cost is saved, and external garbage can be prevented from entering the motor to influence the performance of the motor.

Description

Technical Field

[0001] The present application relates to the field of electromechanics, and particularly to a motor. Background Art

[0002] In the existing motor, during the process of pressing the stator core into the motor housing, burrs will be generated between the stator core and the motor housing. Sometimes, through holes for positioning or for screwing in screws are arranged at the bottom of the motor housing. Due to the existence of the through holes, on the one hand, the burrs generated during the process of pressing the stator core into the motor housing flow out of the motor through the through holes, and on the other hand, the garbage outside the motor housing also invades the interior of the motor through the through holes.

[0003] It should be noted that the above introduction of the technical background is only for the convenience of clearly and completely explaining the technical solution of the present application and facilitating the understanding of those skilled in the art. It cannot be considered that the above technical solutions are well-known to those skilled in the art just because these solutions are described in the background art part of the present application. Summary of the Invention

[0004] The inventor found that for a motor with the above structure, it can be considered to apply burr glue in the area where burrs are generated to prevent the burrs from flowing out. However, this method has a complex production process and high costs.

[0005] To solve at least one of the above problems or other similar problems, an embodiment of the present application provides a motor.

[0006] According to one aspect of the embodiment of the present application, a motor is provided. The motor includes: a stator and a motor housing for accommodating the stator. The motor housing includes a bottom, and the bottom has a through hole. A wall portion is provided between the stator and the bottom of the motor housing. The wall portion divides the space between the stator and the bottom of the motor housing into an inner region of the wall portion and an outer region of the wall portion. The inner region of the wall portion is communicated with the through hole, and the inner region of the wall portion is not communicated with the outer region of the wall portion. Thus, the garbage invaded from the outside can be blocked in a fixed area and does not enter the interior of the motor. At the same time, the burrs generated inside the motor will not flow out of the motor through the threaded holes on the outer periphery of the screws screwed into the through holes, which can save the burr glue coating process and reduce costs.

[0007] In some embodiments, the inner region of the wall portion is radially inside the outer diameter of the stator. Thus, there is sufficient space to accommodate burrs, which is convenient for forming the above-mentioned wall portion.

[0008] In some embodiments, the stator includes a stator core, and one axial side of the stator core has a resin portion. The wall portion is composed of a resin wall formed by the resin portion extending towards the bottom of the motor housing and abutting against the bottom of the motor housing. Thus, it is convenient to form the wall portion.

[0009] In some embodiments, the stator is a molded stator, and the molded resin of the molded stator forms the resin portion. Thereby, the formation of the wall portion can be facilitated.

[0010] In some embodiments, the wall portion is cylindrical and abuts against the bottom of the housing, and the projection of the through hole in the axial direction is within the projection of the wall portion in the axial direction. Thereby, it can be ensured that the through hole is completely covered by the inner region of the wall portion.

[0011] In some embodiments, the bottom of the inner region of the wall portion is closer to the side away from the bottom of the housing than the bottom of the outer region of the wall portion. Thereby, the accommodation space inside the wall portion is increased, and it can be prevented that after foreign matters enter from the through hole, they interfere with the assembly of the motor and other components inserted into the through hole.

[0012] In some embodiments, the center of the through hole coincides with the center of the inner region of the wall portion. Thereby, the distance between the wall portion and the through hole can be minimized as much as possible, so that the burrs inside the motor can be prevented from leaking out to the greatest extent.

[0013] In some embodiments, the housing further has a cylindrical extension wall extending in the axial direction. The cylindrical extension wall is disposed around the through hole, and the cylindrical extension wall and the through hole penetrate in the axial direction. Thereby, the entire circumference of the through hole of the housing can be blocked outside the housing to prevent external dust from entering the inside of the housing. In addition, other components inserted into the motor through the through hole can be supported, the support range can be expanded, and the support strength can be improved.

[0014] In some embodiments, the inner diameter of the cylindrical wall portion is larger than the inner diameter of the through hole. Thereby, it can be prevented that when the wall portion abuts against the bottom of the housing, it interferes with the opening of the through hole.

[0015] In some embodiments, the wall portion is an annular wall portion formed on the side of the stator facing the bottom of the housing with the central axis of the motor as the center, and the annular wall portion is radially outside the through hole of the bottom of the housing. Thereby, by forming the wall portion around the central axis and the through hole, the molding is simple and the assembly is easy.

[0016] One of the beneficial effects of the embodiments of the present application is that, according to the embodiments of the present application, by providing a wall portion between the stator and the bottom of the housing, the wall portion divides the space between the stator and the bottom of the housing into an inner region and an outer region of the wall portion, and the inner region and the outer region of the wall portion are not connected. Thereby, the garbage invading from the outside is blocked in the fixed region and does not enter the inside of the motor. At the same time, the burrs generated inside the motor will not flow out of the motor outside along the threaded holes on the outer circumference of the screw screwed into the through hole, and the burr glue coating process can be omitted, saving costs.

[0017] Embodiments of the present application are disclosed in detail with reference to the following description and the accompanying drawings. It should be understood that the embodiments of the present application are not limited in scope thereby. Within the spirit and terms of the appended claims, the embodiments of the present application include many variations, modifications, and equivalents.

[0018] Features described and / or illustrated for one embodiment can 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.

[0019] It should be emphasized that the term "comprising / including / having" as used herein refers to the presence of a feature, a whole, or a component, but does not exclude the presence or addition of one or more other features, wholes, or components. Description of the Drawings

[0020] The above and other objects, features, and advantages of the embodiments of the present application will become more apparent from the following detailed description in conjunction with the accompanying drawings, in which:

[0021] Figure 1 is an axial sectional view of a motor according to an embodiment of the present application;

[0022] Figure 2 is an axial sectional view of the bottom of the motor housing according to an embodiment of the present application;

[0023] Figure 3 is Figure 2 a partially enlarged schematic view of the virtual frame shown;

[0024] Figure 4 is a schematic view of a stator of a motor according to an embodiment of the present application;

[0025] Figure 5 is a schematic view of a motor housing according to an embodiment of the present application;

[0026] Figure 6 is another schematic view of a stator of a motor according to an embodiment of the present application. Detailed Embodiments

[0027] With reference to the accompanying drawings, the foregoing and other features of the present application will become apparent from the following description. In the description and drawings, specific embodiments of the present application are disclosed, which show some embodiments in which the principles of the present application can be adopted. It should be understood that the present application is not limited to the described embodiments, but includes all modifications, variations, and equivalents falling within the scope of the appended claims.

[0028] In the embodiments of the present application, terms such as "first", "second", "upper", and "lower" are used to distinguish different elements in terms of appellation, but do not represent the spatial arrangement or time sequence of these elements, and these elements should not be limited by these terms. The term "and / or" includes any one and all combinations of one or more of the related listed terms. Terms such as "comprising", "including", and "having" mean the presence of the stated features, elements, components, or assemblies, but do not exclude the presence or addition of one or more other features, elements, components, or assemblies.

[0029] In the embodiments of the present application, the singular forms "a", "the", etc. include the plural forms and should be broadly understood as "a kind of" or "a class of" rather than being limited to the meaning of "one"; in addition, the term "the" should be understood to include both the singular form and the plural form unless the context clearly indicates otherwise. In addition, the term "according to" should be understood as "at least partially according to...", and the term "based on" should be understood as "at least partially based on...", unless the context clearly indicates otherwise.

[0030] In addition, in the following description of the embodiments of the present application, for the convenience of description, the direction extending along the central axis of the motor or the direction parallel thereto is referred to as the "axial direction", the radial direction centered on the central axis is referred to as the "radial direction", the direction around the central axis is referred to as the "circumferential direction", the side along the radial direction away from the central axis is referred to as the "radial outer side", the side along the radial direction close to the central axis is referred to as the "radial inner side", the direction pointing from the bottom of the motor housing along the axial direction to the opening of the motor housing is referred to as the "other axial side" or "axial lower side" or "lower side" or "below", and the direction pointing from the opening of the motor housing along the axial direction to the bottom of the motor housing is referred to as the "axial one side" or "axial upper side" or "upper side" or "above". It should be noted, however, that these are only for the convenience of description and do not limit the orientation of the motor during use and manufacturing.

[0031] The embodiments of the present application will be described below with reference to the accompanying drawings.

[0032] The embodiments of the present application provide a motor. Figure 1 is an axial sectional view of the motor of the embodiments of the present application, as Figure 1 shown, the motor 40 has a stator 20 and a housing 10 that houses the stator 20. The housing 10 includes a bottom 11, and the bottom 11 of the housing includes a through hole 12. Figure 2 is an axial sectional view of the bottom of the housing of the motor of the embodiments of the present application. Figure 3 is Figure 2 a partial enlarged schematic view of the virtual frame shown.

[0033] As Figure 2 and Figure 3As shown, in the embodiment of the present application, a wall portion 30 is provided between the stator 20 and the bottom portion 11 of the housing. The wall portion 30 divides the space between the stator 20 and the bottom portion 11 of the housing into an inner-wall portion region S1 and an outer-wall portion region S2. The inner-wall portion region S1 communicates with the through hole 12, and the inner-wall portion region S1 and the outer-wall portion region S2 are not connected.

[0034] According to the above embodiment, by using the wall portion 30 to divide the space between the stator 20 and the bottom portion 11 of the housing into the inner-wall portion region S1 and the outer-wall portion region S2, the burrs generated during the process of pressing the stator into the housing can be blocked in the outer-wall portion region, and the burrs will not flow out of the motor through the threaded holes, and it can also prevent external garbage from invading the interior of the motor through the through hole 12.

[0035] In some embodiments, as Figure 2 and Figure 3 shown, the inner-wall portion region S1 is radially inside the outer diameter of the stator 20. That is, the above-mentioned wall portion 30 is provided at a position radially inside the outer diameter of the stator 20 to form the above-mentioned inner-wall portion region S1. Thus, it is ensured that the outer-wall portion region S2 has sufficient space to accommodate the burrs, which is beneficial to the forming of the wall portion 30.

[0036] In some embodiments, as Figure 2 and Figure 3 shown, the stator 20 has a stator core 21, and a resin portion 22 is provided on one axial side of the stator core 21. The wall portion 30 is composed of a resin wall 23 formed by the resin portion 22 extending toward the bottom portion 11 of the housing and abutting against the bottom portion 11 of the housing. Thus, by forming the wall portion 30 with the resin portion 22, it is convenient for the forming of the wall portion 30.

[0037] In some embodiments, the stator 20 is a molded stator, which is composed of a stator core, a coil wound around the stator core, and a molded resin wrapping the stator core and the coil. The molded resin forms the above-mentioned wall portion 30 as the above-mentioned resin portion 22. Thus, the above-mentioned wall portion 30 is directly formed by the molded resin of the molded stator, which is convenient for the forming of the wall portion 30.

[0038] In the above embodiment, taking the resin portion 22 (such as the molded resin) of the stator core 21 to form the wall portion 30 as an example, the present application does not limit the forming position and forming method of the wall portion 30. For example, the wall portion 30 can also be formed on the bottom portion 11 of the housing. For example, the above-mentioned wall portion 30 is formed on the side of the bottom portion 11 of the housing facing the stator core 21 and abuts against the resin portion 22 of the stator core 21. Thus, the above-mentioned inner-wall portion region S1 and the outer-wall portion region S2 can also be formed and the two are not connected. Thus, the burrs generated during the process of pressing the stator into the housing can also be blocked in the inner-wall portion region, and at the same time, the burrs will not flow out of the motor through the threaded holes, and it can also prevent external garbage from invading the interior of the motor through the through hole 12.

[0039] Figure 4 is a schematic diagram of the stator of the motor according to an embodiment of the present application, Figure 5 is a schematic diagram of the motor housing according to an embodiment of the present application, Figure 6 is another schematic diagram of the stator of the motor according to an embodiment of the present application.

[0040] In some embodiments, as Figure 3 , Figure 4 and Figure 6 shown, the wall portion 30 is cylindrical and abuts against the bottom 11 of the housing, and the projection of the through hole 12 in the axial direction is within the projection of the wall portion 30 in the axial direction. Thus, it can be ensured that the through hole is completely covered by the inner region of the wall portion.

[0041] As an example, as Figure 2 and Figure 3 shown, the center 14 of the through hole 12 coincides with the center 31 of the inner region S1 of the wall portion. That is, in this example, the wall portion 30 surrounds the through hole 12 once with the center of the through hole 12 as the center. Thus, the distance between the wall portion and the through hole can be minimized as much as possible, so that the burrs inside the motor can be prevented from leaking out to the greatest extent.

[0042] As another example, as Figure 6 shown, the wall portion 30 is an annular wall portion formed on the side of the stator 20 facing the bottom 11 of the housing with the central axis 41 of the motor 40 as the center, and the annular wall portion 30 is radially outside the through hole 12 of the bottom 11 of the housing. That is, in this example, the wall portion 30 is an annular wall portion with the central axis of the motor as the center, and the through hole 12 is within the range surrounded by the annular wall portion. Thus, the wall portion is easy to form and simple to assemble, and at the same time, the effect of blocking the burrs in the inner region of the wall portion and preventing them from flowing out of the motor can be achieved.

[0043] In the above example, there may be multiple through holes 12. For example, they may be arranged in the manner shown in Figure 5 , but the present application is not limited thereto. Since the through hole 12 is used for connection with external devices, its setting position and size depend on specific requirements, and the present application does not make any restrictions.

[0044] In some embodiments, as Figure 3 shown, the bottom B2 of the inner region S1 of the wall portion 30 is closer to the side away from the bottom 11 of the housing than the bottom of the outer region S2 of the wall portion 30 that is close to the bottom B1 of the wall portion 30. That is, relative to the bottom of the outer region S2 that is close to one bottom of the wall portion 30, the depth of the depression of the inner region S1 of the wall portion is deeper.

[0045] In the above embodiments, as Figure 3As shown, the bottom B2 of the inner-wall region S1 of the wall portion 30 refers to the bottom B2 of the region S1 on the left side of the wall portion 30. The outer-wall region S2 of the wall portion 30 has two bottoms. One bottom B1 is closer to the wall portion 30, and the other bottom B3 is farther from the wall portion 30 than the bottom B1. The bottom B2 of the inner-wall region S1 of the wall portion 30 is closer to the side away from the bottom 11 of the housing than the bottom B1 of the outer-wall region S2 of the wall portion 30.

[0046] Thereby, the accommodation space inside the wall portion is increased, preventing foreign objects from the outside from interfering with the assembly of the motor and other components inserted into the through-hole after invading through the through-hole.

[0047] In some embodiments, as Figure 3 and Figure 5 shown, the housing 10 has a cylindrical extension wall 13 extending along the axial direction. The cylindrical extension wall 13 is arranged around the through-hole 12, and the cylindrical extension wall 13 and the through-hole 12 penetrate in the axial direction. For example, the cylindrical extension wall 13 and the through-hole 12 may be axially opposed, that is, the centers of the cylindrical extension wall 13 and the through-hole 12 are coaxial. However, the present application is not limited thereto. The cylindrical extension wall 13 and the through-hole 12 may also be slightly offset in the axial direction as long as the insertion of other components (such as screws or other fixing components) inserted into the through-hole 12 is ensured.

[0048] Thereby, the entire circumference of the through-hole can be blocked outside the housing, preventing external dust from entering the interior of the housing, and further supporting other components inserted into the interior of the motor through the through-hole, expanding the support range.

[0049] In some embodiments, as Figure 2 and Figure 3 shown, the inner diameter of the wall portion 30 is larger than the inner diameter of the through-hole 12. For example, the inner diameter of the wall portion 30 is set to be larger than the inner diameter of the cylindrical extension wall 13, and the inner diameter of the cylindrical extension wall 13 may be slightly larger than or equal to the inner diameter of the through-hole 12. Thereby, when the wall portion abuts against the bottom of the housing, interference with the opening of the through-hole can be prevented, which is beneficial to the assembly of the motor.

[0050] It should be noted that only the structure of the motor related to the present application is described above. The motor may further include other components. For example, as Figure 1 shown, the motor 40 may further include a rotating shaft 50, a bearing 60 arranged around the rotating shaft 50, etc. Specifically, reference can be made to related technologies, and the description is omitted here.

[0051] As can be seen from the above embodiments, by providing a wall portion between the stator and the bottom of the housing, the space between the stator communicated with the through hole and the bottom of the housing is divided into an inner region of the wall portion and an outer region of the wall portion. For example, the center of the inner region of the wall portion is made to coincide with the center of the through hole; or, an annular wall portion is formed on the side of the stator facing the bottom of the housing with the central axis of the motor as the center. The inner region of the wall portion is communicated with the through hole, and the inner region of the wall portion is not communicated with the outer region of the wall portion. Thus, burrs can be blocked in the inner region of the wall portion and will not flow out of the motor through the threaded hole, which can not only eliminate the burr glue coating process and save costs, but also prevent external debris from invading the interior of the motor through the through hole.

[0052] The embodiments of the present application have been described in detail above with reference to the accompanying drawings, indicating the manner in which the principles of the present application can be employed. However, it should be understood that the implementation of the present application is not limited to the above-described embodiments, and also includes all changes, modifications, and equivalents that do not depart from the scope of the gist of the present application.

Claims

1. A motor, the motor comprising a stator and a housing accommodating the stator, the housing including a bottom portion having a through hole, characterized in that, a wall portion is provided between the stator and the bottom portion of the housing, the wall portion divides the space between the stator and the bottom portion of the housing into an inner region of the wall portion and an outer region of the wall portion, the inner region of the wall portion communicates with the through hole, and the inner region of the wall portion and the outer region of the wall portion are not in communication.

2. The motor according to claim 1, characterized in that, the inner region of the wall portion is radially inward of the outer diameter of the stator.

3. The motor according to claim 1, characterized in that, the stator includes a stator core, one axial side of the stator core has a resin portion, and the wall portion is constituted by a resin wall formed by the resin portion extending toward the bottom portion of the housing and abutting against the bottom portion of the housing.

4. The motor according to claim 3, characterized in that, the stator is a molded stator, and the molded resin of the molded stator forms the resin portion.

5. The motor according to claim 3, characterized in that, the wall portion is cylindrical and abuts against the bottom portion of the housing, and the projection of the through hole in the axial direction is within the projection of the wall portion in the axial direction.

6. The motor according to claim 5, characterized in that, the bottom of the inner region of the wall portion is closer to the side away from the bottom portion of the housing than the bottom of the outer region of the wall portion close to the bottom of the wall portion.

7. The motor according to claim 5, characterized in that, the center of the through hole coincides with the center of the inner region of the wall portion.

8. The motor according to claim 5, characterized in that, the housing further has a cylindrical extension wall extending in the axial direction, the cylindrical extension wall is disposed around the through hole, and the cylindrical extension wall and the through hole penetrate in the axial direction.

9. The motor according to claim 7, characterized in that, the inner diameter of the wall portion is larger than the inner diameter of the through hole.

10. The motor according to claim 5, characterized in that, the wall portion is an annular wall portion formed on the side of the stator facing the bottom portion of the housing with the central axis of the motor as the center, and the annular wall portion is radially outside the through hole of the bottom portion of the housing.

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