Motor structure, electric drive system and motorized device

Abstract

The application provides a motor structure, an electric drive system and a motorized device. The motor structure comprises a stator assembly, a motor housing, and a fixing assembly. The stator assembly comprises a plurality of stator laminations and the fixing assembly. The plurality of stator laminations are distributed along a first direction. The fixing assembly penetrates the plurality of stator laminations and locks the plurality of stator laminations. The motor housing is configured with a receiving cavity configured to accommodate the stator assembly. The fixing assembly penetrates the plurality of stator laminations and locks the plurality of stator laminations to form the entire stator assembly. The fixing assembly does not need to be fixed on the motor housing. Then, wires are embedded and inserted and finally fixed on the receiving cavity of the motor housing through a corresponding process. The fixing mode of the stator laminations can avoid the problem of adhesive attachment, greatly improves the rigidity of the stator assembly, improves the maximum speed and reliability of the motor structure, does not need to invest in curing equipment, and simplifies the production process.

Description

Technical Field

[0001] This application relates to the field of drive motor technology, and more specifically, to a motor structure, an electric drive system, and a motor device. Background Technology

[0002] With the rapid popularization of new energy vehicles, electric drive systems are developing rapidly towards higher power density, lower cost, higher integration and higher efficiency.

[0003] This trend necessitates high power density in motors, requiring both high power output and compact size. However, currently, stator laminations in motors are fixed with adhesive after lamination, which presents challenges such as adhesive adhesion and complex manufacturing processes. Utility Model Content

[0004] The purpose of this application is to provide an electric motor structure, electric drive system, and motor equipment that can avoid the problem of glue adhesion, eliminate the need for curing equipment, and simplify the production process.

[0005] In a first aspect, embodiments of this application provide a motor structure, including: a stator assembly, including a fixing component and a plurality of stator laminations, the plurality of stator laminations being distributed along a first direction, the fixing component passing through the plurality of stator laminations and locking them; and a motor housing, which is provided with a receiving cavity, the receiving cavity being configured to receive the stator assembly.

[0006] In the above process, after the fixing component is inserted into several stator laminations, it is locked to form the entire stator assembly. The fixing component does not need to be fixed to the motor housing. Subsequently, the wire is inserted and finally fixed to the receiving cavity of the motor housing through the corresponding process. The method of fixing the stator laminations can avoid the problem of glue adhesion, greatly improve the rigidity of the stator assembly, improve the maximum speed and reliability of the motor structure, and simplify the production process without the need for curing equipment.

[0007] In some embodiments, the stator laminations are provided with a plurality of fixing holes along their periphery, the fixing holes being configured for the insertion of the fixing components.

[0008] In the above process, the fixing components are distributed around the stator laminations through several fixing holes. This not only fixes several stator laminations, but also, because a rivetless fixing method is used, it can effectively avoid the reduction in slot fill factor caused by glue adhesion and reduce the eddy current loss of the stator assembly with rivets.

[0009] In some embodiments, the fixing component includes a fixing member and a locking member. One end of the fixing member is configured to abut against the outermost stator lamination, and the other end of the fixing member passes through a plurality of the stator laminations and extends to the outside of the stator laminations. The locking member is located on the outside of the stator laminations and is connected to the other end of the fixing member.

[0010] In the above process, the cooperation between the locking and fixing parts secures several stator laminations, which can reduce eddy current losses in stator cores with rivet points, reduce the risk of stator core cracking and lamination warping; at the same time, it can improve the overall rigidity of the stator assembly, improve NVH performance (estimated to reduce by 5-10dB), improve the low-temperature interference strength of the stator core and system reliability, and improve the efficiency of the motor structure by 1%.

[0011] In some embodiments, the stator assembly is interference-fitted with the motor housing. This allows for proper assembly between the stator assembly and the motor housing, improving the reliability of the motor structure and its NVH performance.

[0012] In some embodiments, the interference fit between the stator assembly and the motor housing is configured to be 0.10 mm to 0.4 mm. This allows for proper assembly between the stator assembly and the motor housing, improving the reliability of the motor structure and its NVH performance.

[0013] In some embodiments, the stator assembly is fixed to the motor housing by a heat-shrinking process.

[0014] In some embodiments, the thickness of the stator laminations is configured to be 0.02 mm to 1.2 mm.

[0015] In some embodiments, the inner edge of the stator laminations is provided with a plurality of copper wire grooves, which are configured as open grooves or closed grooves. By providing these copper wire grooves on the inner edge of the stator laminations, the stator assembly can be configured for wire insertion and wiring.

[0016] Secondly, this application also provides an electric drive system, including the motor structure described in any of the above claims.

[0017] Since the electric drive system provided in the second aspect includes a motor structure, the electric drive system has all the technical effects of the motor structure, which will not be elaborated here.

[0018] Thirdly, this application also provides a motorized device, including the electric drive system described above.

[0019] Since the motorized equipment provided by the third party includes an electric drive system, the motorized equipment has all the technical effects of an electric drive system, which will not be elaborated here.

[0020] Other features and advantages of this application will be set forth in the following description, or some features and advantages may be inferred from the description or determined without doubt, or may be learned by practicing the above-described techniques of this application.

[0021] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the motor structure provided in an embodiment of this application;

[0024] Figure 2 This is a schematic diagram of the stator assembly of the motor structure provided in the embodiments of this application.

[0025] Figure Labels

[0026] 10. Stator assembly; 101. Stator laminations; 102. Fixing hole; 103. Copper wire groove; 104. Fixing component; 105. Locking component; 20. Motor housing. Detailed Implementation

[0027] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0028] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0029] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0030] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or a point connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0031] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, elements, or components (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0032] Example

[0033] In the design of drive motor systems for new energy vehicles, there are generally two methods for fixing stator laminations. One method involves adding rivets around the stator laminations for stacking, followed by laser welding at the outer diameter of the stator. The other method involves using stator laminations without rivets, applying highly adhesive to the circumference of the stator laminations, or using an impregnation process to absorb adhesive between the stator laminations after stacking, or using stator lamination materials with self-adhesive. All three methods involve fixing the laminations by heating and curing the adhesive after stacking. Both the mechanical fixing method using stator lamination rivets and laser welding, and the method using highly adhesive, have their shortcomings. Using stator lamination rivet fasteners with laser welding results in numerous rivet fasteners that significantly increase eddy current losses within the stator, reducing the efficiency of the motor system. Furthermore, the production process requires investment in laser welding equipment, leading to high production costs. Using adhesive fasteners results in adhesive overflowing onto the stator's outer surface, the stator slots, and the stator's inner surface. Adhesive adhesion to these areas is unacceptable, as it affects slot fill factor, the fit between the stator and the housing, and increases the risk of system interference. Removing this adhesive is extremely difficult, especially from inside the stator slots, where it is virtually impossible to remove by physical means, making the process incredibly challenging.

[0034] In view of this, such as Figures 1-2 As shown, in a first aspect, this application provides a motor structure, including: a stator assembly 10 and a motor housing 20. The stator assembly 10 is assembled into the motor housing 20. The stator assembly 10 is fixed by a rivetless fastener, which effectively avoids the reduction in slot fill rate caused by glue adhesion. The application scenarios of this solution are not limited to water-cooled motors or oil-cooled motors. It innovates on the individual stator assembly 10, rather than on the motor structure. The stator assembly 10 does not need to be provided with welding slots, and does not need to be fixed by welding to improve the strength and modality of the stator assembly 10.

[0035] Specifically, the stator assembly 10 includes a fixing component and a plurality of stator laminations 101, the plurality of stator laminations 101 being distributed along a first direction, the fixing component passing through the plurality of stator laminations 101 and locking them; the motor housing 20 is provided with a receiving cavity, the receiving cavity being configured to receive the stator assembly 10.

[0036] For example, the first direction includes, but is not limited to, the thickness direction of the stator laminations 101, and the fixing assembly is used to fix a plurality of the stator laminations 101 together to form a stator assembly 10, which is then wound with copper wire and assembled into the receiving cavity of the motor housing 20.

[0037] It should be noted that the raw material of the stator lamination 101 is an amorphous material. Of course, in other embodiments, the material can also be silicon steel, nanocrystalline, or other materials.

[0038] In the above process, after the fixing component is inserted into several stator laminations 101, it is locked to form the entire stator assembly 10. The fixing component does not need to be fixed to the motor housing 20. Subsequently, the wire is inserted and finally fixed to the receiving cavity of the motor housing 20 through the corresponding process. The method of fixing the stator laminations 101 can avoid the problem of glue adhesion, greatly improve the rigidity of the stator assembly 10, improve the maximum speed and reliability of the motor structure, and simplify the production process without the need for curing equipment.

[0039] like Figures 1-2 As shown, the stator lamination 101 has a plurality of fixing holes 102 arranged along its periphery, and the fixing holes 102 are configured for the insertion of the fixing components.

[0040] For example, there are eight fixing holes 102, which are equally spaced on the stator laminations 101. Of course, the number of fixing holes 102 is not specifically limited, and the number of fixing holes 102 can be appropriately adjusted according to the requirements of the motor structure scheme to balance its optimal economy.

[0041] In the above process, the fixing components are distributed around the stator laminations 101 through a number of fixing holes 102. This not only fixes the stator laminations 101, but also, since the fixing method is without rivets, it can effectively avoid the reduction in slot fill factor caused by glue adhesion and reduce the eddy current loss of the stator assembly 10 with rivets.

[0042] like Figure 1 As shown, the fixing assembly includes a fixing member 104 and a locking member 105. One end of the fixing member 104 is configured to abut against the outermost stator lamination 101, and the other end passes through a plurality of stator laminations 101 and extends to the outside of the stator laminations 101. The locking member 105 is located on the outside of the stator laminations 101 and is connected to the other end of the fixing member 104.

[0043] For example, the fastener 104 includes, but is not limited to, bolts, and the locking element 105 includes, but is not limited to, nuts. The fastener 104 can be configured as a flange with a self-locking function and a nut with a reverse loosening function. Of course, in other embodiments, the fastening component is not limited to a bolt and nut combination structure. For example, it can also be a screw with a double-ended nut, or a metal rod riveting, etc.

[0044] In the above process, the cooperation between the locking member 105 and the fixing member 104 can fix a number of stator laminations 101, which can reduce the eddy current loss of the stator core with rivets, reduce the risk of stator core cracking and lamination warping; at the same time, it can improve the overall rigidity of the stator assembly 10, improve NVH performance (estimated to reduce by 5-10dB), improve the low temperature interference strength of the stator core and the reliability of the system, and improve the efficiency of the motor structure by 1%.

[0045] like Figure 1 As shown, the stator assembly 10 and the motor housing 20 are interference-fitted. This allows for assembly between the stator assembly 10 and the motor housing 20, improving the reliability of the motor structure and its NVH performance.

[0046] In some embodiments, the interference fit between the stator assembly 10 and the motor housing 20 is configured to be 0.10 mm to 0.4 mm, which can be adaptively adjusted depending on the operating environment and application conditions of the motor structure. This allows for the assembly of the stator assembly 10 and the motor housing 20, improving the reliability and NVH performance of the motor structure.

[0047] In some embodiments, the stator assembly 10 is fixed to the motor housing 20 by a heat-shrink process.

[0048] In some embodiments, the thickness of the stator lamination 101 is configured to be 0.02 mm to 1.2 mm, but it is not limited to this thickness. In order to meet the requirements of the motor structure, it can be any other thickness of lamination material.

[0049] In some embodiments, the inner edge of the stator lamination 101 is provided with a plurality of copper wire grooves 103, which are configured as open grooves (i.e., open type) or closed grooves (closed type). By providing the copper wire grooves 103 on the inner edge of the stator lamination 101, the winding and insertion functions of the stator assembly 10 can be realized.

[0050] Secondly, this application also provides an electric drive system, including the motor structure as described above. The motor structure can be integrated into the electric drive system, which may further include a housing, a reducer, a controller, and a cooling structure. The output shaft of the motor structure is connected to the reducer, and the rotation of the motor structure is output through the reducer. The controller can be used to control the operation of the motor structure and to transmit control signals to the outside.

[0051] Since the electric drive system provided in the second aspect includes a motor structure, the electric drive system has all the technical effects of the motor structure, which will not be elaborated here.

[0052] Thirdly, this application also provides a motor device, including the electric drive system described above. The motor device includes a vehicle, which can be a new energy vehicle, including but not limited to pure electric vehicles, hybrid electric vehicles, hydrogen fuel cell vehicles, etc., and this application does not specifically limit this.

[0053] Since the motorized equipment provided by the third party includes an electric drive system, the motorized equipment has all the technical effects of an electric drive system, which will not be elaborated here.

[0054] In all embodiments of this application, "large" and "small" are relative terms, "more" and "less" are relative terms, and "upper" and "lower" are relative terms. The embodiments of this application will not elaborate further on the expression of such relative terms.

[0055] It should be understood that the phrases "in this embodiment," "in this application embodiment," or "as an optional implementation" throughout the specification mean that a specific feature, structure, or characteristic related to an embodiment is included in at least one embodiment of this application. Therefore, the phrases "in this embodiment," "in this application embodiment," or "as an optional implementation" appearing throughout the specification do not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Those skilled in the art should also understand that the embodiments described in the specification are all optional embodiments, and the actions and modules involved are not necessarily essential to this application.

[0056] In the various embodiments of this application, it should be understood that the sequence number of each process does not necessarily imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0057] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of protection of the claims.

Claims

1. A motor structure, characterized in that, include: The stator assembly includes a fixing component and a plurality of stator laminations, the plurality of stator laminations being distributed along a first direction, the fixing component passing through the plurality of stator laminations and locking them in place; The motor housing has a receiving cavity configured to receive the stator assembly.

2. The motor structure according to claim 1, characterized in that, The stator laminations are provided with a plurality of fixing holes along their periphery, the fixing holes being configured for the insertion of the fixing components.

3. The motor structure according to claim 1 or 2, characterized in that, The fixing component includes a fixing member and a locking member. One end of the fixing member is configured to abut against the outermost stator lamination, and the other end of the fixing member passes through a plurality of the stator laminations and extends to the outside of the stator laminations. The locking member is located on the outside of the stator laminations and is connected to the other end of the fixing member.

4. The motor structure according to claim 1, characterized in that, The stator assembly is interference-fitted with the motor housing.

5. The motor structure according to claim 4, characterized in that, The interference fit between the stator assembly and the motor housing is configured to be 0.10 mm to 0.4 mm.

6. The motor structure according to claim 1 or 2, characterized in that, The stator assembly is fixed to the motor housing by a heat-shrinking process.

7. The motor structure according to claim 1 or 5, characterized in that, The thickness of the stator laminations is configured to be 0.02 mm to 1.2 mm.

8. The motor structure according to claim 1, characterized in that, The inner edge of the stator laminations is provided with a plurality of copper wire grooves, which are configured as open grooves or closed grooves.

9. An electric drive system, characterized in that, Includes the motor structure as described in any one of claims 1-8.

10. A motorized device, characterized in that, Includes the electric drive system as described in claim 9.

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