Motor

Abstract

A motor comprising a stator and a housing accommodating the stator, the housing having a bottom with a through-hole. A wall connecting the stator and the bottom of the housing is provided between the stator and the bottom of the housing, wherein the inner wall portion and the outer wall portion are not connected to each other. According to the embodiments of the application, it is possible to prevent burrs generated during press-molding of the stator into the housing from protruding from the motor, thereby eliminating the process of burr adhesive coating, which is associated with cost savings, and it is also possible to prevent external dirt from entering the motor through the through-hole.

Description

Technical area

[0001] The application relates to the field of electromechanical engineering, in particular to a motor. Background technology

[0002] In existing motors, burrs form between the stator core and the housing during the pressing of the stator core into the housing. Some motors have a through hole on the underside of the housing for positioning or screwing in screws. Due to this through hole, burrs created during the pressing of the stator core into the housing escape to the outside of the motor. This through hole also allows dirt from outside the housing to enter the motor.

[0003] It should be noted that the introduction of the above technical background is only for the convenience of providing a clear and complete explanation of the technical solution of this application and the understanding thereof by those skilled in the art. It cannot be assumed that the above-mentioned technical solutions are known to those skilled in the art merely because they are described in the technical background of this application. Overview of the invention

[0004] The inventor has found that, for motors with the above structure, it is possible to apply flash adhesive to the areas where flashes are generated to prevent flashes from escaping. However, this approach involves a complex production process and high costs.

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

[0006] According to one aspect of the exemplary embodiment of the application, a motor is provided, comprising a stator and a housing that accommodates the stator, wherein the housing has a bottom with a through-hole, and wherein a wall is provided between the stator and the bottom of the housing, which wall divides a space between the stator and the bottom of the housing into an inner wall region and an outer wall region, wherein the inner wall region is connected to the through-hole, while the inner wall region and the outer wall region are not connected to each other. This allows dirt penetrating from the outside to be blocked in a fixed area and thus prevented from entering the motor.At the same time, the burrs generated inside the motor do not flow / leak out of the motor through the threaded holes on the outer circumference of the screws screwed into the through holes, so costs are reduced due to the elimination of burr adhesive coating technology.

[0007] In some embodiments, the inner wall region is located further radially inward than an outer diameter of the stator. This ensures that sufficient space is available to accommodate the burrs and facilitate the formation of the aforementioned wall.

[0008] In some embodiments, the stator includes a stator iron core having a resin portion on one axial side, wherein the wall is formed by a resin wall formed by the resin portion and extending toward the bottom of the housing and abutting the bottom of the housing. This can facilitate the formation of the wall.

[0009] In some embodiments, the stator is a molded stator that forms the resin region with its molded resin. This can facilitate the formation of the wall.

[0010] In some embodiments, the wall is cylindrical and abuts the bottom of the housing, and wherein a projection of the through-hole in the axial direction lies within the range of a projection of the wall in the axial direction. This ensures that the through-hole is completely covered by the inner wall region.

[0011] In some embodiments, the bottom of the inner wall portion of the wall is located closer to the bottom of the wall and closer to a side away from the bottom of the housing relative to the bottom of the outer wall portion of the wall. This increases the receiving space on the inside of the wall, which can prevent external debris from entering the through-hole and interfering with the assembly of the motor and other components inserted into the through-hole.

[0012] In some embodiments, a center of the through-hole coincides with a center of the inner wall region. This makes it possible to minimize the distance between the wall and the through-hole as much as possible, thereby minimizing the escape of burrs in the motor.

[0013] In some embodiments, the housing further includes a cylindrical extension wall extending axially and disposed around the through-hole, wherein the cylindrical extension wall and the through-hole are axially continuous. This allows the through-hole of the housing to be completely covered from the outside to prevent external dust from entering the housing. Furthermore, other components inserted into the motor through this through-hole can be supported to expand the support area and increase the support strength.

[0014] In some embodiments, an inner diameter of the wall is larger than an inner diameter of the through-hole. This can prevent interference with the opening of the through-hole when the wall abuts against the housing base.

[0015] In some embodiments, the wall is formed as an annular wall section formed around the central axis of the motor on a side of the stator facing the housing bottom and radially outward than the through hole on the housing bottom. By forming the wall around the central axis and the through hole, molding / manufacturing and assembly are simplified.

[0016] One of the advantageous effects of the embodiment of the application is that a wall according to the embodiment of the application is arranged between the stator and the bottom of the housing, which divides the space between the stator and the bottom of the housing into an inner wall region and an outer wall region. The inner wall region and the outer wall region are not connected to each other, thereby blocking externally intruding dirt in a fixed region and thus preventing it from entering the motor. At the same time, the burrs generated inside the motor do not leak out of the motor through the threaded holes on the outer periphery of the screws screwed into the through holes, thus reducing costs due to the elimination of burr adhesive coating technology.

[0017] With reference to the following explanations and the accompanying drawings, specific embodiments of the application are disclosed in detail. It should be understood that the embodiment of the application is not limited in scope thereby.

[0018] The features described and / or illustrated for one embodiment may be used in one or more other embodiments in the same or similar manner, combined with features in other embodiments, or replace features in other embodiments.

[0019] It should be emphasized that the terms "including / comprising / having" used in this application refer to the presence of features, parts or components, but do not exclude the presence or addition of one or more other features, parts or components. Description of the characters

[0020] The above and other purposes, features, and advantages of the embodiment of the application will become more apparent from the detailed description in combination with the accompanying drawings. In the drawings: Fig. 1 is an axial sectional view of the motor in an embodiment of the application; Fig. Figure 2 is an axial sectional view of the underside of the housing of the motor in an embodiment of the application; Fig. 3 a locally enlarged schematic representation of the dashed block in Fig. 2; Fig. 4 a schematic representation of the stator of the motor in an embodiment of the application; Fig. 5 a schematic representation of the motor housing in an embodiment of the application; Fig. 6 a further schematic representation of the stator of the motor in an embodiment of the application. Specific embodiments

[0021] The above and other features of this application will become apparent from the following description, with reference to the accompanying figures. Specific embodiments of the application are disclosed in the description and the accompanying figures, which indicate a portion of the embodiments in which the principles of the application may be practiced. It is to be understood that the present application is not limited to the described embodiments, but includes all modifications and variations that fall within the scope of the appended claims.

[0022] In the embodiments of the application, the terms "first," "second," "top," "bottom," etc., are used to distinguish various elements in terms of terminology, but do not indicate the spatial arrangement or temporal sequence of these elements, and these elements should not be limited by these terms. The term "and / or" encompasses any or all combinations of one or more linked listed terms. The terms "comprise," "include," "have," etc., refer to the presence of the recited features, elements, parts, or components, but do not preclude the presence or addition of one or more other features, elements, parts, or components.

[0023] In the embodiments of this application, singular forms such as "a" and "a class" encompass plural forms and should be understood generally to mean "a kind" or "a class" rather than being limited to the meaning of "a." Furthermore, the term "the" includes both singular and plural forms unless the context indicates otherwise. Furthermore, the term "depends on" should be understood to mean "at least partially dependent on...", and the term "based on" should be understood to mean "at least partially based on..." unless the context indicates otherwise.

[0024] Furthermore, in the following description of the embodiment of the application, for the sake of description, the direction extending along the central axis of the motor or parallel thereto is referred to as "axial", the radial direction centered on the central axis is referred to as "radial", the direction around the central axis is referred to as "circumferential direction", the side far from the central axis along the radial direction is referred to as "radially outer", the side facing the central axis along the radial direction is referred to as "radially inner", the direction axially pointing from the bottom of the motor housing to the opening of the motor housing is referred to as "at the axial side", "axially lower side", "lower side" or "lower", the direction pointing from the opening of the motor housing to the bottom of the motor housing is referred to as "an axial side", "axially upper side", "upper side" or "upper".However, it is worth noting that these are for descriptive purposes only and do not limit the orientation of the engine during use and manufacturing.

[0025] In the following, embodiments of the application are explained in conjunction with the attached drawings.

[0026] An embodiment of the application provides a motor, and Fig. 1 shows an axial sectional view of the motor in the embodiment of the application. As in Fig. As shown in Figure 1, the motor 40 includes a stator 20 and a housing 10 that houses the stator 20. The housing 10 includes a bottom 11 with a through hole 12. Fig. 2 is an axial sectional view of the bottom of the motor housing of the embodiment of the application, and Fig. 3 is a partially enlarged schematic representation of the dashed block in Fig. 2.

[0027] As in the Fig. 2 and Fig. As shown in Figure 3, in the embodiment of the application, a wall 30 is provided between the stator 20 and the bottom 11 of the housing. The wall 30 divides the space between the stator 20 and the bottom 11 of the housing into an inner wall region S1 and an outer wall region S2, wherein the inner wall region S1 is connected to the through-hole 12, while the inner wall region S1 and the outer wall region S2 are not connected to each other.

[0028] According to the above embodiment, the space between the stator 20 and the bottom 11 of the housing is divided by the wall into the inner wall region S1 and the outer wall region S2, whereby the burrs generated during the pressing of the stator into the housing are blocked by the inner wall region and cannot escape from the motor through the threaded holes. It is also possible to prevent external dirt from entering the motor through the through hole 12.

[0029] In some embodiments, as in the Fig. 2 and Fig. 3, the inner wall portion S1 is located radially inward than (or relative to) the outer diameter of the stator 20. That is, the above-mentioned wall 30 is arranged at a radially inner position with respect to the outer diameter of the stator 20 and forms the inner wall portion S1, thereby ensuring that the outer wall portion S2 has sufficient space to accommodate burrs, which is conducive to the formation of the wall 30.

[0030] In some embodiments, as in the Fig. 2 and Fig. As shown in Figure 3, the stator 20 includes a stator iron core 21 having a resin portion 22 on one axial side of the stator iron core 21. The wall 30 is formed from a resin wall 23 formed by the resin portion 22 and extending toward the bottom 11 of the housing and abutting the bottom 11 of the housing. Forming the wall 30 from the resin portion 22 facilitates the formation of the wall 30.

[0031] In some embodiments, the stator 20 is a molded stator formed from a stator core, a coil wound around the stator core, and a molded resin encasing the stator core and the coil. The molded resin as the resin region 22 forms the wall 30. Thus, the aforementioned wall 30 is directly formed by the molding resin of the molded stator, facilitating the formation of the wall 30.

[0032] In the above embodiments, the wall 30 is formed, for example, by the resin portion 22 (such as molded resin) of the stator iron core 21, but in the application, the position and manufacturing method of the wall 30 are not limited. For example, the wall 30 may also be formed on the bottom 11 of the housing, for example, on a side of the bottom 11 of the housing facing the stator iron core 21, and abutting against the resin portion 22 of the stator iron core 21, whereby the inner wall portion S1 and the outer wall portion S2 can also be formed such that the inner wall portion and the outer wall portion are not connected to each other. Therefore, it is also possible to block the burrs generated during press-molding of the stator into the housing in the inner wall portion so that the burrs do not leak out of the motor through the threaded holes.It is also possible to prevent external dirt from entering the motor through the through hole 12.

[0033] Fig. 4 is a schematic representation of the stator of the motor in the embodiment of the application, Fig. 5 is a schematic representation of the motor housing in the embodiment of the application, and Fig. 6 is another schematic diagram of the stator of the motor in the embodiment of the application.

[0034] In some embodiments, as in the Fig. 3, Fig. 4 and Fig. As shown in Figure 6, the wall 30 is cylindrical and abuts the bottom 11 of the housing, with the axial projection of the through-hole 12 lying within the axial projection area of the wall 30. This ensures that the through-hole is completely covered by the inner wall area.

[0035] As an example, as in the Fig. 2 and Fig. 3, the center 14 of the through-hole 12 corresponds to the center 31 of the inner wall portion S1. That is, in this example, the wall 30 completely surrounds the through-hole 12 with the center of the through-hole 12 as the center. Thus, it is possible to minimize the distance between the wall and the through-hole as much as possible, so that the leakage of burrs in the motor can be largely prevented.

[0036] As another example, as in Fig. 6, the wall 30 is an annular wall 30 formed around the central axis 41 of the motor 40 on a side of the stator 20 facing the bottom 11 of the housing. The annular wall 30 is located radially outward relative to the through-hole 12 at the bottom 11 of the housing. That is, in this example, the wall portion 30 is formed as a circular wall around the central axis of the motor, with the through-hole 12 located within the area enclosed by the circular wall. This facilitates wall forming and assembly, and can achieve blocking of burrs in the inner wall region S1 without protruding from the motor.

[0037] In the above example, several through holes 12 can be provided, which, for example, in the Fig. 5, but this application is not limited thereto. Since the through-hole 12 is used for connection to external devices, its arrangement position and size depend on specific requirements, and there are no restrictions thereon in this application.

[0038] In some embodiments, as in Fig. 3, the lower part B2 of the inner wall portion S1 of the wall 30 is located closer to the bottom B1 of the wall 30 and closer to a side remote from the bottom 11 of the housing than the lower part of the outer wall portion S2 of the wall 30. That is, the inner wall portion is sunk deeper than one of the lower parts of the outer wall portion S2 that is located closer to the wall 30.

[0039] In the above embodiment, as in Fig. 3, the lower part B2 of the inner wall region S1 of the wall 30 refers to the lower part B2 of the left side region S1 of the wall 30. The outer wall region S2 of the wall 30 has two lower parts, one of which is the lower part B1 closer to the wall 30 and the other is the lower part B3 farther from the wall 30 than the one lower part B1. The lower part B2 of the inner wall region S1 is closer to a side remote from the bottom 11 of the housing than the lower part B1 of the outer wall region S2.

[0040] This increases the receiving space on the inside of the wall to prevent external foreign matter from entering the through hole and interfering with the assembly of the motor and other components inserted into the through hole.

[0041] In some embodiments, as in the Fig. 3 and Fig. 5, the housing 10 has an axially extending cylindrical extension wall 13 arranged around the through-hole 12 and axially continuous with the through-hole 12. For example, the cylindrical extension wall 13 and the through-hole 12 may be axially opposite, that is, the center of the cylindrical extension wall 13 and the center of the through-hole 12 are coaxial, but the application is not limited thereto. The cylindrical extension wall 13 and the through-hole 12 may also be slightly axially offset, as long as the insertion of other components (such as screws or other fixing elements) inserted into the through-hole 12 is ensured.

[0042] This makes it possible to cover the through hole from the outside of the housing all around to prevent external dust from entering the housing and to further support other components inserted into the motor through the through hole to expand the support area.

[0043] In some embodiments, as in the Fig. 2 and Fig. 3, the inner diameter of the wall 30 is larger than the inner diameter of the through hole 12. For example, if the inner diameter of the wall 30 is set to be larger than the inner diameter of the cylindrical extension wall 13, 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. This prevents the wall from obstructing the opening of the through hole when it abuts the housing bottom, thus facilitating motor assembly.

[0044] It should be noted that the foregoing description is only intended to describe the structure of the motor in the context of the present application, and the motor may also include other constructions. For example, the motor 40 may be constructed as shown in Fig. 1, may also include a rotatable shaft 50, a bearing 60 around the rotatable shaft 50, etc. For this, reference may be made to the corresponding technology for details, and the explanation is omitted here.

[0045] As can be seen from the above embodiments, by disposing a wall between the stator and the bottom of the housing, the space between the stator connected to the through hole and the bottom of the housing is divided into an inner wall portion and an outer wall portion, with a center of the through hole coinciding with a center of the inner wall portion. Alternatively, a circular wall may be formed around the central axis of the motor on a side of the stator facing the housing bottom. By connecting the inner wall portion to the through hole while the inner wall portion and the outer wall portion are not connected to each other, it is possible to block burrs in the inner wall portion without causing burrs to leak out of the motor through the threaded hole.This not only eliminates the need for flash adhesive coating, which results in cost savings, but also prevents external dirt from entering the motor through the through hole.

[0046] The above detailed description of the embodiments of the application with reference to the accompanying drawings indicates how the principles of the application can be applied. However, it should be understood that the implementation of this application is not limited to the manners described in the above embodiments, but also includes all changes, modifications, and variations that do not depart from the scope of the application.

Claims

[1] A motor comprising a stator and a housing accommodating the stator, the housing having a bottom with a through hole, a wall being provided between the stator and the bottom of the housing, dividing a space between the stator and the bottom of the housing into an inner wall portion and an outer wall portion, the inner wall portion being connected to the through hole, while the inner wall portion and the outer wall portion are not connected to each other. [2] The motor according to claim 1, wherein the inner wall portion is arranged radially inward relative to an outer diameter of the stator. [3] A motor according to claim 1 or 2, wherein the stator comprises a stator iron core having a resin portion on one axial side, the wall being formed by a resin wall formed by the resin portion and extending to the bottom of the housing and abutting against the bottom of the housing. [4] A motor according to claim 3, wherein the stator is a molded stator which forms the resin portion with its molded resin. [5] Engine according to claim 3 or 4, characterized by that the wall is cylindrical and abuts the bottom of the housing, and wherein a projection of the through hole in the axial direction lies within the range of a projection of the wall in the axial direction. [6] The motor of claim 5, wherein the bottom of the inner wall portion of the wall is located closer to the bottom of the wall and closer to a side remote from the bottom of the housing relative to the bottom of the outer wall portion of the wall. [7] The motor according to claim 5 or 6, wherein a center of the through hole coincides with a center of the inner wall portion. [8] The motor according to any one of claims 5 to 7, wherein the housing further comprises a cylindrical extension wall extending axially and disposed around the through hole, the cylindrical extension wall and the through hole being axially continuous. [9] The motor according to claim 7 or 8, wherein an inner diameter of the wall is larger than an inner diameter of the through hole. [10] A motor according to any one of claims 5 to 9, wherein the wall is an annular wall portion formed around the central axis of the motor on a side of the stator facing the housing bottom and located radially outwardly with respect to the through hole on the underside of the housing.

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