Motor
By using metal bus bars in the motor to support the protrusions axially, the assembly instability caused by insufficient resin strength is solved, and the stable assembly and high-precision pressing of the stator assembly in the case is achieved.
Patent Information
- Application Number
- CN202310799055.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-06-30
- Publication Date
- 2024-12-31
AI Technical Summary
During the motor assembly process, due to insufficient resin strength, the assembly tool may easily cause the resin surface to break when the pressure is applied to the molded resin surface, resulting in unstable assembly of the stator core.
The projection is axially supported by a metal bus bar to enhance the strength of the projection, and clamp the coil lead wire through the claws to improve the support effect, ensuring the stable assembly of the molded stator assembly in the case.
The axial support of the projection by the bus bar increases the strength of the projection, avoids resin cracking, and improves the assembly stability and pressing accuracy of the stator assembly in the case.
Smart Images
Figure CN119231811A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of electromechanics, and in particular to a motor. Background Art
[0002] During the assembly process of the motor, it is usually necessary to assemble the molded stator core with the housing. The general method is to abut a tool against the surface of the molded resin to press the stator core into the housing from the opening side of the housing.
[0003] 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
[0004] The inventors have found that when assembling a motor by the above method, due to insufficient strength of the resin, when an assembly tool abuts against the surface of the molded resin and applies pressure, the resin surface may be cracked.
[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 in which a metal bus bar is provided so that the bus bar axially supports the protrusion, thereby increasing the strength of the protrusion and facilitating the assembly of the molded stator assembly to the housing.
[0006] According to a first aspect of an embodiment of the present application, a motor is provided, the motor comprising:
[0007] A housing having an outer peripheral wall extending in a circumferential direction around a central axis, the housing having an opening on one axial side of the outer peripheral wall and a bottom on the other axial side of the outer peripheral wall; and
[0008] A stator assembly is provided in a molded form, the stator assembly comprising a stator, a bus bar assembly and a molded resin,
[0009] The bus bar assembly is supported by the stator, and the mold resin covers the bus bar assembly in the axial direction.
[0010] The busbar assembly includes a metal busbar,
[0011] The molded resin is located on one axial side of the stator and has a protrusion protruding toward one axial side.
[0012] In a cross section perpendicular to the axial direction, the projection of the bus bar and the projection of the protrusion at least partially overlap,
[0013] The molding resin is filled between the bus bar and the protrusion.
[0014] In at least one embodiment, the bus bar has a claw portion, and the claw portion clamps the coil lead wire of the stator.
[0015] In a cross section perpendicular to the axial direction, a projection of the protrusion and a projection of the claw at least partially overlap.
[0016] In at least one embodiment, the claw portion extends axially into the protrusion.
[0017] In at least one embodiment, the number of the claws is more than 2 and they are equidistantly distributed in the circumferential direction.
[0018] In at least one embodiment, the number of the claws is 3.
[0019] In at least one embodiment, the coil lead wires are arranged in at least two groups in the circumferential direction, each group includes at least two coil lead wires, and the coil lead wires in the same group are led out from the same tooth gap and clamped by the same claw portion.
[0020] In at least one embodiment, the claw portion includes a first arm portion and a second arm portion that extend in opposite directions in the circumferential direction, respectively, and the first arm portion and the second arm portion respectively clamp different coil lead wires in the same group.
[0021] In at least one embodiment, the protrusion extends from the radial outer side to the radial inner side, and includes a main body and a first auxiliary reinforcement portion located on a radial side of the main body, and the width of the main body in the circumferential direction is greater than the width of the first auxiliary reinforcement portion.
[0022] In at least one embodiment, the main body portion is located radially outward relative to the first auxiliary reinforcement portion.
[0023] In at least one embodiment, the molded resin also has an auxiliary protrusion on one axial side, the auxiliary protrusion extends from the radial outer side to the radial inner side, is located between adjacent protrusions in the circumferential direction, and the circumferential width of the auxiliary protrusion is smaller than the circumferential width of the main body.
[0024] One of the beneficial effects of the embodiments of the present application is that the protrusion is axially supported by the bus bar, which increases the strength of the protrusion and facilitates the assembly of the molded stator assembly to the casing.
[0025] 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.
[0026] 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.
[0027] It should be emphasized that the term “include / comprises” when used herein refers to the presence of features, integers, steps or components, but does not exclude the presence or addition of one or more other features, integers, steps or components. BRIEF DESCRIPTION OF THE DRAWINGS
[0028] 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.
[0029] 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:
[0030] Figure 1 It is a disassembled schematic diagram of the motor 100 according to the embodiment of the present application.
[0031] Figure 2 1 is a schematic diagram of an assembled motor 100 according to an embodiment of the present application.
[0032] Figure 3 1 is a cross-sectional view of a portion of the motor 100 according to the embodiment of the present application cut along the central axis OO'.
[0033] Figure 4 yes Figure 1 The diagram shows a schematic diagram of the coil lead wire 4 in the motor 100 being clamped by the claw portion 2211 .
[0034] Figure 5 yes Figure 1 The diagram is a schematic diagram showing that the coil lead wire 4 in the motor 100 is not clamped by the claw portion 2211 .
[0035] Figure 6 yes Figure 1 The stator assembly 2 in the motor 100 is shown as a schematic diagram of a top view along the axial OO' direction. DETAILED DESCRIPTION
[0036] The foregoing and other features of the present application will become apparent through the following description with reference to the accompanying drawings. In the description and the accompanying drawings, specific embodiments of the present application are specifically 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. On the contrary, the present application includes all modifications, variations and equivalents falling within the scope of the attached claims. Various embodiments of the present application are described below in conjunction with the accompanying drawings. These embodiments are exemplary only and are not limitations of the present application.
[0037] In the embodiments of the present application, the terms "first", "second", "upper", "lower", etc. are used to distinguish different elements in terms of title, but do not indicate the spatial arrangement or time order of these elements, etc., 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 associated listed terms. The terms "comprising", "including", "having", etc. refer to the presence of the stated features, elements, components or components, but do not exclude the presence or addition of one or more other features, elements, components or components.
[0038] In the embodiments of the present application, the singular forms "a", "the", etc. 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.
[0039] 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 to it is referred to as the "axial direction", the radial direction centered on the central axis is referred to as the "radial direction", the side away from the central axis along the radial direction is referred to as the "radial outer side", the side close to the central axis along the radial direction is referred to as the "radial inner side", and the direction around the central axis is referred to as the "circumferential direction". However, it is worth noting that these are only for the convenience of description and do not limit the orientation of the motor during use and manufacturing.
[0040] The embodiments of the present application are described below with reference to the accompanying drawings.
[0041] An embodiment of the present application provides a motor.
[0042] Figure 1 is a disassembled schematic diagram of the motor 100 according to an embodiment of the present application, Figure 2 is a schematic diagram of an assembled motor 100 according to an embodiment of the present application, Figure 31 is a cross-sectional view of a portion of the motor 100 according to the embodiment of the present application cut along the central axis OO'.
[0043] like Figure 1 , Figure 2 and Figure 3 As shown, the motor 100 includes a housing 1 and a stator assembly 2 .
[0044] The housing 1 has an outer peripheral wall 11 extending circumferentially around the central axis OO′. The housing 1 has an opening 111 on one axial side of the outer peripheral wall 11 and a bottom 112 on the other axial side of the outer peripheral wall 11 .
[0045] The stator assembly 2 is provided as a molded product, and includes a stator 21, a bus bar assembly 22, and a mold resin 23. The bus bar assembly 22 is supported by the stator 21, and the mold resin 23 covers the bus bar assembly 22 in the axial direction.
[0046] The bus bar assembly 22 includes a bus bar 221 made of metal and a bus bar holder 222 for holding the bus bar 221 .
[0047] The molded resin 23 is located on one axial side of the stator 21 and has a protrusion 231 protruding toward one axial side. In a cross section perpendicular to the axial direction, the projection of the bus bar 221 and the projection 231 at least partially overlap, and the space between the bus bar 221 and the protrusion 231 is filled with the molded resin 23.
[0048] According to the motor 100 in the embodiment of the present application, a protrusion 231 is provided on the surface of the molded resin 23, and a metal bus bar 221 is buried in the protrusion 231. Since the projection of the bus bar 221 and the projection of the protrusion 231 at least partially overlap, the bus bar 221 can axially support the protrusion 231, thereby increasing the strength of the protrusion 231. When the assembly tool abuts against the surface of the protrusion 231 of the molded resin 23 and applies pressure, the molded resin 23 is not easy to break, thereby facilitating the assembly of the molded stator assembly 2 to the housing 1.
[0049] like Figure 2As shown, the bus bar 221 has a claw 2211, and the claw 2211 can clamp the coil lead wire 4 of the stator 21. The claw 2211 can extend in the axial direction and / or the claw 2211 extends in a direction perpendicular to the axial direction, for example, the claw 2211 extends in the circumferential direction. On a cross section perpendicular to the axial direction, the projection of the protrusion 231 and the projection of the claw 2211 overlap at least partially. As a result, when the claw 2211 extends in the axial direction, the axial rigidity can be increased, thereby improving the support strength of the protrusion 231; in addition, when the claw 2211 extends in a direction perpendicular to the axial direction, the force area of the claw 2211 in the direction perpendicular to the axial direction can be increased, and the support strength of the protrusion 231 can also be improved. In addition, the wrapping of the molded resin 23 makes the connection between the claw 2211 and the coil lead wire more reliable.
[0050] In the present application, the claw portion 2211 may extend axially into the protrusion 231. Thus, the claw portion 2211 has a better supporting effect on the protrusion 231, further improving the mechanical strength of the protrusion 231.
[0051] In the present application, the number of claws 2211 is more than 2, for example, the number of claws 2211 is 3. More than 2 claws 2211 are equidistantly distributed in the circumferential direction. Thus, the claws 2211 are equidistantly distributed in the circumferential direction, and the protrusions 231 are also equidistantly distributed in the axial direction, so that when the molded stator assembly 2 is pressed into the housing 1 using an assembly tool, the molded stator assembly 2 is subjected to uniform force, thereby improving the pressing accuracy. In addition, when three protrusions 231 are formed, a supporting surface is formed by the surfaces of the three protrusions 231 to ensure stability during the process of pressing the molded stator assembly 2 into the housing 1.
[0052] Figure 4 yes Figure 1 A schematic diagram of the coil lead wire 4 of the motor 100 being clamped by the claw portion 2211 is shown. Figure 5 yes Figure 1 The diagram is a schematic diagram showing that the coil lead wire 4 in the motor 100 is not clamped by the claw portion 2211 .
[0053] like Figure 4 and Figure 5 As shown, the coil lead wires 4 are arranged in multiple groups in the circumferential direction, for example, at least 2 groups, each group includes multiple coil lead wires 4, for example, each group includes at least 2 coil lead wires 4, and the same group of coil lead wires 4 are led out from the same tooth gap 5 and clamped by the same claw 2211. Thus, a winding method that matches the protrusion 231 can be formed, and the claw 2211 is convenient for clamping the coil lead wire 4 while supporting the protrusion 231.
[0054] In addition, the claw portion 2211 has a first arm portion 2211 (a) and a second arm portion 2211 (b) extending in opposite directions in the circumferential direction, respectively, and the first arm portion 2211 (a) and the second arm portion 2211 (b) respectively clamp different coil lead wires 4 in the same group. As a result, the claw portion 2211 has a certain extension in the circumferential direction, and the extension direction is toward the opposite side, which reliably supports the protrusion 231 with an increased circumferential width and facilitates the support of the coil lead wire.
[0055] Figure 6 yes Figure 1 The stator assembly 2 in the motor 100 is shown as a schematic diagram of a top view along the axial OO' direction.
[0056] like Figure 6 As shown, the molded resin 23 is annular, and its radial inner side and radial outer side correspond to the inner ring A and outer ring B of the annular shape respectively. The protrusion 231 extends from the radial outer side to the radial inner side (for example, the protrusion 231 extends radially), and the protrusion 231 may include a main body 2311 and a first auxiliary reinforcement 2312 located on one radial side of the main body 2311 in the radial direction. In the circumferential direction, the width of the main body 2311 is greater than the width of the first auxiliary reinforcement 2312. In this way, the strength of the protrusion 231 can be ensured, and the amount of the molded resin 23 can be saved.
[0057] like Figure 6 As shown, the main body 2311 is located radially outward relative to the first auxiliary reinforcement 2312, that is, the projection of the main body 2311 at least partially overlaps with the projection of the claw 2211. Thus, the radial position of the main body 2311 can be set in accordance with the radial position of the claw 2211, and the claw 2211 is located radially outward, so that there is enough working space when the claw 2211 is used to clamp the coil lead wire 4.
[0058] In this application, if Figure 6 As shown, the molded resin 23 further has an auxiliary protrusion 232 on one axial side, the auxiliary protrusion 232 extends from the radial outer side to the radial inner side (for example, the auxiliary protrusion 232 extends in the radial direction), and is located between adjacent protrusions 231 in the circumferential direction, and the circumferential width of the auxiliary protrusion 232 is smaller than the circumferential width of the main body 2311, for example, the circumferential width of the auxiliary protrusion 232 can be smaller than or equal to the circumferential width of the first auxiliary reinforcement 2312. In this way, the pressure bearing strength of the molded resin can be enhanced, and resin materials can be saved.
[0059] In this application, if Figure 1 As shown, the motor 100 may further include a rotor 3, which is configured to be radially opposite to the stator assembly 2. Figure 1As shown, the rotor 3 is located radially inside the stator assembly 2. For detailed description of the rotor 3, reference may be made to the related art.
[0060] It is worth noting that the above only exemplifies the composition and structure of the motor related to the present application, but the present application is not limited thereto, and appropriate modifications can be made based on the above embodiments. In addition, the above only exemplifies the various components, but the present application is not limited thereto, and the specific contents of each component can also refer to the relevant technology; the motor can also include other components, such as bearings, etc., which can be specifically referred to the relevant technology, and the description is omitted here.
[0061] The present application is 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 present application. Those skilled in the art can make various modifications and variations to the present application based on the spirit and principles of the present application, and these modifications and variations are also within the scope of the present application.
[0062] 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, the embodiments of the present application are not intended to be limited to the precise structures and operations illustrated and described, but all suitable modifications and equivalents that fall within their scope may be covered.
Claims
1. A motor, characterized in that: The motor comprises: A housing having an outer peripheral wall extending in a circumferential direction around a central axis, the housing having an opening on one axial side of the outer peripheral wall and a bottom on the other axial side of the outer peripheral wall; and A stator assembly is provided in a molded form, the stator assembly comprising a stator, a bus bar assembly and a molded resin, The bus bar assembly is supported by the stator, and the mold resin covers the bus bar assembly in the axial direction. The busbar assembly includes a metal busbar, The molded resin is located on one axial side of the stator and has a protrusion protruding toward one axial side. In a cross section perpendicular to the axial direction, the projection of the bus bar and the projection of the protrusion at least partially overlap, The molding resin is filled between the bus bar and the protrusion.
2. The motor according to claim 1, characterized in that The bus bar has a claw portion, and the claw portion clamps the coil lead wire of the stator. In a cross section perpendicular to the axial direction, a projection of the protrusion and a projection of the claw at least partially overlap.
3. The motor according to claim 2, characterized in that The claw portion extends into the protrusion in the axial direction.
4. The motor according to claim 2, characterized in that The number of the claws is more than 2 and they are distributed at equal distances in the circumferential direction.
5. The motor according to claim 4, characterized in that The number of the claws is 3.
6. The motor according to claim 2, characterized in that The coil lead wires are arranged in at least two groups in the circumferential direction, each group includes at least two coil lead wires, and the coil lead wires in the same group are led out from the same tooth gap and clamped by the same claw portion.
7. The motor according to claim 6, characterized in that The claw portion includes a first arm portion and a second arm portion that extend in opposite directions in the circumferential direction, respectively, and the first arm portion and the second arm portion respectively clamp different coil lead wires in the same group.
8. The motor according to claim 2, characterized in that The protrusion extends from the radial outer side to the radial inner side, and includes a main body and a first auxiliary reinforcement portion located at a radial side of the main body. The width of the main body in the circumferential direction is greater than the width of the first auxiliary reinforcement portion.
9. The motor according to claim 8, characterized in that The main body portion is located radially outward relative to the first auxiliary reinforcement portion.
10. The motor according to claim 8, characterized in that The molded resin further has an auxiliary protrusion on one axial side, the auxiliary protrusion extending from the radial outer side to the radial inner side and being located between adjacent protrusions in the circumferential direction. The auxiliary protrusion has a circumferential width smaller than a circumferential width of the main body.