Stator assembly and motor

Abstract

The utility model provides a stator assembly and a motor. The stator assembly includes: a stator core including a plurality of tooth portions and having an opening portion formed between end portions on one side in a radial direction of two adjacent tooth portions; at least one part of the stator coil is accommodated between two adjacent tooth parts; and a wedge block located on one side of the stator coil in the radial direction and on the other side of the stator coil in the radial direction, the wedge block including a base portion opposed to the opening portion, the base portion being formed with a groove recessed toward the other side in the radial direction, thereby reducing the occurrence rate of a buckling phenomenon after the stator coil is installed, and improving the reliability of the stator coil. And meanwhile, the stator coil is prevented from protruding out of or separating from the stator core.

Description

Technical Field

[0001] This utility model relates to the field of electromechanical engineering, and in particular to a stator assembly and a motor. Background Technology

[0002] With the development of science and technology, motors are being used in an increasingly wide range of applications, including many electrical products. These electrical products can be devices or components that include motors, such as any vehicle-mounted device, home appliance, office automation equipment, industrial equipment, transportation equipment, or components within such equipment.

[0003] In existing motor structures, the motor has a stator assembly and a rotor that can rotate relative to the stator. The stator assembly includes a stator core and a stator coil housed in the stator core. The stator coil is installed between two adjacent teeth of the stator core. To prevent the coil from falling out of the slot formed by the two adjacent teeth, a wedge is inserted into the slot.

[0004] It should be noted that the above introduction to the technical background is only for the purpose of providing a clear and complete explanation of the technical solutions of this utility model and facilitating understanding by those skilled in the art. It should not be assumed that these technical solutions are known to those skilled in the art simply because they have been described in the background section of this utility model. Utility Model Content

[0005] The inventors discovered that in the existing motor structure described above, the stator coil is installed between two adjacent teeth of the stator core, and the following buckling phenomenon often occurs. For example, the wedge is subjected to the squeezing force of the stator coil, causing the wedge to protrude in the direction of tooth extension, which in turn causes the stator coil to protrude or detach from the stator core.

[0006] To address one or more of the aforementioned problems or other similar issues, this utility model provides a stator assembly that can reduce the incidence of stator coil buckling after installation, while preventing the stator coil from protruding or detaching from the stator core.

[0007] According to a first aspect of the present invention, a stator assembly is provided, the stator assembly comprising: a stator core including a plurality of teeth, an opening being formed between the ends of two adjacent teeth on a radial side; a stator coil, at least a portion of which is received between two adjacent teeth; and a wedge located on a radial side of the stator coil and on the radial side of the opening, the wedge including a base opposite to the opening, the base forming a groove recessed toward the radial side.

[0008] In some embodiments, the base includes a first sidewall, a second sidewall, and a bottom connecting the first sidewall and the second sidewall, the bottom being located closer to the other radial side than the first sidewall and the second sidewall, the first sidewall, the second sidewall, and the bottom forming the groove.

[0009] In some embodiments, when viewed axially, the bottom is longer than both the first and second sidewalls.

[0010] In some embodiments, when viewed axially, the lengths of the first sidewall and the second sidewall are equal.

[0011] In some embodiments, the depth of the groove is equal at all locations in the axial direction.

[0012] In some embodiments, the wedge further includes a first support portion and a second support portion, the first support portion and the second support portion being respectively disposed opposite to two adjacent teeth portions, the base portion connecting the first support portion and the second support portion, the first sidewall being connected to the first support portion and forming a first angle at the connection between the two, the second sidewall being connected to the second support portion and forming a second angle at the connection between the two, the angle of the first angle being equal to the angle of the second angle.

[0013] In some embodiments, the angles of both the first angle and the second angle are less than 90 degrees.

[0014] In some embodiments, the greater the depth of the groove, the smaller the angles of the first angle and the second angle.

[0015] In some embodiments, when viewed axially, the distance between the first angle and the second angle is greater than or equal to the size of the opening.

[0016] According to another aspect of the present invention, a motor is provided that includes the stator assembly described in any of the above embodiments.

[0017] One of the beneficial effects of this utility model embodiment is that by providing a groove recessed to the radial side at the base of the wedge opposite to the opening, the radial strength of the wedge is increased, thereby reducing the occurrence of buckling after the stator coil is installed, and preventing the stator coil from protruding or detaching from the stator core. Furthermore, since the groove is recessed to the radial side (i.e., towards the stator coil), in other words, the base of the wedge protrudes to the radial side (i.e., towards the stator coil), even if the groove undergoes slight deformation to the radial side after coil installation, the wedge will not protrude from the opening.

[0018] The embodiments of this utility model are disclosed in detail with reference to the following description and accompanying drawings. It should be understood that the embodiments of this utility model are not limited in scope thereto. Within the spirit and scope of the appended claims, the embodiments of this utility model include many changes, modifications, and equivalents.

[0019] Features described and / or illustrated for 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. Attached Figure Description

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

[0021] Figure 1 This is a schematic diagram of the stator core according to an embodiment of the present invention;

[0022] Figure 2 This is a schematic diagram of two adjacent teeth of the stator core in an embodiment of this utility model;

[0023] Figure 3 This is a perspective view of the wedge block according to an embodiment of the present utility model;

[0024] Figure 4 This is a cross-sectional view of the wedge block according to an embodiment of the present invention. Detailed Implementation

[0025] Referring to the accompanying drawings, the foregoing and other features of this utility model will become apparent from the following description. Specific embodiments of this utility model are specifically disclosed in the description and drawings, illustrating partial implementations in which the principles of this utility model can be employed. It should be understood that this utility model is not limited to the described embodiments; rather, it includes all modifications, variations, and equivalents falling within the scope of the appended claims.

[0026] In embodiments of this utility model, 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 assemblies, but do not exclude the presence or addition of one or more other features, elements, components, or assemblies.

[0027] In this embodiment of the invention, the singular forms "a," "the," etc., may include the plural forms and should be broadly interpreted as "a kind" or "a class" rather than limited to the meaning of "an." Furthermore, the term "the" should be understood to include both the singular and plural forms unless the context explicitly indicates otherwise. Additionally, the term "according to" should be understood as "at least partially based on…," and the term "based on" should be understood as "at least partially based on…," unless the context explicitly indicates otherwise.

[0028] Furthermore, in the following description of this application, for ease of explanation, the direction extending along or parallel to the central axis CC' of the stator assembly is referred to as "axial direction," the radial direction centered on the central axis CC' is referred to as "radial direction," and the direction around the central axis CC' is referred to as "circumferential direction." However, it should be noted that these are merely for ease of explanation and do not limit the orientation of the stator assembly during use and manufacturing.

[0029] The embodiments of this utility model will now be described with reference to the accompanying drawings.

[0030] First aspect of the embodiments

[0031] Figure 1 This is a schematic diagram of the stator core according to an embodiment of the present invention; Figure 2 This is a schematic diagram of two adjacent teeth on the stator core of this utility model embodiment.

[0032] like Figure 1 As shown, the stator assembly 100 includes: a stator core 1, a stator coil 2, and a wedge block 3.

[0033] The stator core 1 includes a plurality of teeth 11, and an opening 12 is formed between the ends 111 on the radial side of two adjacent teeth 11; at least a portion of the stator coil 2 is housed between two adjacent teeth 11; and a wedge 3 is located on the radial side of the stator coil 2 and on the radial side of the opening 12, that is, the wedge 3 is located on the radial side of the stator coil 2 close to the opening 12, or in other words, the wedge 3 is located radially between the stator coil 2 and the opening 12.

[0034] The wedge 3 includes a base 31 opposite to the opening 12, the base 31 having a groove 32 recessed toward the other side in the radial direction.

[0035] Therefore, by having a groove 32 recessed radially to the other side at the base 31 opposite to the opening 12 of the wedge 3, the radial strength of the wedge 3 is increased, thereby reducing the incidence of buckling after the stator coil 2 is installed and preventing the stator coil 2 from protruding or detaching from the stator core 1. Furthermore, since the groove 32 is recessed radially to the other side (i.e., towards the stator coil 2), in other words, the base 31 of the wedge 3 protrudes radially to the other side (i.e., towards the stator coil 2), even if the groove 32 undergoes slight deformation radially after the stator coil 2 is installed, the wedge 3 will not protrude from the opening 12.

[0036] For example, such as Figure 1 As shown, the stator core 1 is a cylindrical structure. In this embodiment, the central axis CC' of the stator core 1 is perpendicular to the plane of the paper. The stator core 1 includes a yoke 13 in a ring shape with the central axis as the center. Each of the plurality of teeth 11 extends radially to one side (i.e., radially inner side) along the other side (i.e., radially outer side) of the yoke 13 of the core 1.

[0037] In this embodiment of the present invention, the structure of the stator core 1 is illustrated by taking the example of the tooth 11 extending from the radially outer side to the radially inner side of the yoke 13. This application is not limited thereto. In some embodiments, the stator core 1 may also be in the form of the tooth 11 extending from the radially inner side to the radially outer side of the yoke 13.

[0038] The plurality of teeth 11 are arranged at equal intervals along the circumference of the yoke 13, and each tooth 11 has an end 111 formed on its radially inner side. An opening 12 is formed between the ends 111 of two adjacent teeth 11, opening towards the radially inner side. The stator coil 2 passes axially between two adjacent teeth 11 of the stator core 1. A wedge 3 is provided at the opening 12 between the ends 111 of two adjacent teeth 11, located radially inner to the stator coil 2 and radially outer to the opening 12, thereby preventing the stator coil 2 from falling out from the radially inner side of the opening 12 and allowing the stator coil 2 to be housed between the two teeth 11.

[0039] The explanation will be based on two adjacent teeth 11-1 and 11-2 along the circumferential direction. Figure 2 As shown, for example, tooth 11-1 has an end portion 111-1 formed axially, and adjacent tooth 11-2 has an end portion 111-2 formed axially. An opening 12 is formed between the end portion 111-1 of adjacent tooth 11-1 and the end portion 111-2 of tooth 11-2 in the circumferential direction, opening towards the radially inward side and extending axially. Wedge 3 is disposed radially outside the opening 12 of tooth 11-1 and 11-2. Figure 2 (in the direction of the middle arrow Z), and radially inside stator coil 2 ( Figure 2 (The direction opposite to the middle arrow Z).

[0040] The structure of wedge 3 is described below as an example. Figure 3 This is a perspective view of a wedge block according to an embodiment of the present utility model.

[0041] like Figure 2 and Figure 3 As shown, the wedge 3 is axially disposed between two adjacent teeth 11. The wedge 3 has a base 31 axially opposite to the opening 12, and the base 31 has a groove 32 recessed radially outward. The groove 311 can be of various forms, such as rectangular, trapezoidal, or arc-shaped cross-sections, etc., and this embodiment of the present invention does not limit this.

[0042] In this embodiment of the present invention, when the wedge block 3 is installed on the stator core 1 that extends radially outward from the yoke 13 to the radially inward, the base 31 has a groove 32 that is recessed radially outward because the opening direction of the opening 12 is radially inward.

[0043] In some embodiments, when the same wedge 3 is installed on the stator core 1 extending radially outward from the radially inner side of the tooth 11 from the radially outer side of the yoke 13, since the opening direction of the opening 12 is radially outward, the base 31 is formed with a groove 32 recessed radially inward. The structure of the wedge 3 itself does not change, and the recessed direction of the groove 32 only needs to be opposite to the opening direction of the opening 12.

[0044] In some embodiments, the base 31 includes a first sidewall 311, a second sidewall 312, and a bottom 313 connecting the first sidewall 311 and the second sidewall 312. The bottom 313 is located closer to the other radial side than the first sidewall 311 and the second sidewall 312. The first sidewall 311, the second sidewall 312, and the bottom 313 form the groove 32.

[0045] like Figure 3 As shown, the base 31 is a groove-shaped structure composed of a first sidewall 311, a second sidewall 312, and a bottom 313. The bottom 313 extends axially in a rectangular shape and is opposite to the opening 12. When the stator coil 2 is housed between two adjacent teeth 11-1 and 11-2, the surface of the groove 31 on the side opposite to the opening direction of the opening 12 contacts the radial inner side of the stator coil 2.

[0046] Figure 4 This is a cross-sectional view of the wedge block according to an embodiment of the present invention. Figure 4 The cross section in the diagram is the section of wedge 3 perpendicular to the central axis, that is, the cross section viewed along the axial direction.

[0047] In some embodiments, when viewed axially, the bottom 313 is longer than the first sidewall 311 and the second sidewall 312.

[0048] like Figure 4 As shown, the direction perpendicular to the paper surface is the extension of the central axis. Observing the cross section of the groove 32 along the central axis (perpendicular to the paper surface), the length of the bottom 313 is L1, the length of the first sidewall 311 is L2, and the length of the second sidewall 312 is L3, wherein L1 is greater than L2 and L3.

[0049] Therefore, by setting the bottom surface 313 to be longer than the two side walls 311 and 312, the force-bearing area of ​​the wedge block 3 can be increased, thereby reducing the amount of deformation of the groove 32 of the wedge block 3 towards the radial side.

[0050] In some embodiments, when viewed axially, the first sidewall 311 and the second sidewall 312 are of equal length.

[0051] like Figure 4 As shown, when viewing the cross-section of the groove 32 along the central axis, the length of the first sidewall 311 is L2, which is equal to the length of the second sidewall 312, which is L3.

[0052] Therefore, setting the first sidewall 311 and the second sidewall 312 to have equal lengths can improve the stability of the wedge block 3.

[0053] In some embodiments, the length of the first sidewall 311 is L2 and the length of the second sidewall 312 is L3. Alternatively, L2 can be set to be greater than L3 or less than L3. The settings can be made according to the actual situation, and this utility model embodiment does not limit this.

[0054] In some embodiments, the depth of the groove 32 is equal at various locations in the axial direction.

[0055] like Figure 4 As shown, the cross-section of the groove 32 is viewed along the central axis. The cross-section of the groove 32 is trapezoidal. The distance H between the bottom 313 of the groove 32 and the radially inner end of the first sidewall 311 and the second sidewall 312 is the depth of the groove 32, that is, the height of the trapezoidal cross-section of the groove 32. The groove 32 extends along the axis with a uniform trapezoidal cross-sectional shape.

[0056] Therefore, by setting the depth of the groove 32 to be equal at all positions in the axial direction, the strength of the wedge 3 at all positions in the axial direction can be guaranteed, thereby preventing the wedge 3 from protruding from the opening 12 at all positions in the axial direction, and simplifying the manufacturing process of the wedge 3.

[0057] In some embodiments, the wedge block 3 further includes a first support portion 33 and a second support portion 34, the first support portion 33 and the second support portion 34 being respectively disposed opposite to two adjacent teeth 11, the base portion 31 connecting the first support portion 33 and the second support portion 34, the first sidewall 311 being connected to the first support portion 33, and a first angle being formed at the connection between the two, the second sidewall 312 being connected to the second support portion 34, and a second angle being formed at the connection between the two, the angle of the first angle being equal to the angle of the second angle.

[0058] like Figure 2 and Figure 4 As shown, the wedge 3 is composed of a first support portion 33, a second support portion 34, and a base portion 31. The base portion 31 is disposed between the ends of the first support portion 33 and the second support portion 34 on the same side as the opening direction of the opening portion 12. The end of the first support portion 33 on the opposite side of the opening of the opening portion 12 contacts the side wall of the tooth portion 11-1. The end of the second support portion 34 on the opposite side of the opening of the opening portion 12 contacts the side wall of the tooth portion 11-2. The first support portion 33 and the second support portion 34 enable the wedge 3 to be fixed at the opening portion 12 of the two adjacent teeth portions 11-1 and 11-2.

[0059] like Figure 4 As shown, a first angle α is formed at the connection between the first sidewall 311 and the first support portion 33, and a second angle β is formed at the connection between the second sidewall 312 and the second support portion 34. The angles of the first angle α and the second angle β are equal. In this embodiment of the invention, the first angle α and the second angle β are acute triangles, and the angles of the first angle α and the second angle β are equal to 60°. This angle can be adjusted according to the actual situation and is not limited here.

[0060] Therefore, by forming two angles, a first angle α and a second angle β, on the wedge 3, the stability and strength of the wedge 3 in the circumferential direction can be guaranteed.

[0061] In some embodiments, the angles of the first angle α and the second angle β are both less than 90 degrees.

[0062] Therefore, by ensuring that both the first angle α and the second angle β are less than 90 degrees, the stability and strength of the wedge in the circumferential direction can be further guaranteed.

[0063] In some embodiments, the greater the depth of the groove 32, the smaller the angles α of the first angle and β of the second angle.

[0064] That is, by increasing the depth of the groove 32, the angles of the first angle α and the second angle β are reduced, thereby further enhancing the strength of the wedge block 3, and making the bottom 313 of the wedge block 31 less prone to buckling.

[0065] In some embodiments, when viewed axially, the distance between the first angle α and the second angle β is greater than or equal to the size of the opening 12.

[0066] For example, such as Figure 2 As shown, the distance between the first angle α and the second angle β is S, and the size of the opening 12 is W, where S is greater than or equal to W.

[0067] Therefore, the distance between the first angle α and the second angle β is greater than or equal to the size of the opening 12, which can further reduce the occurrence of buckling phenomenon after the stator coil 2 is installed.

[0068] According to the above embodiment, by having a groove 32 recessed in the radial direction at the base 31 opposite to the opening 12 of the wedge 3, the radial strength of the wedge 3 is increased, thereby reducing the incidence of buckling after the stator coil 2 is installed and preventing the stator coil 2 from protruding or detaching from the stator core 10. Furthermore, since the groove 32 is recessed in the radial direction (i.e., towards the stator coil 2), in other words, the base 31 of the wedge 3 protrudes in the radial direction (i.e., towards the stator coil 2). Even if the groove 32 undergoes slight deformation in the radial direction after the stator coil 2 is installed, the wedge 3 will not protrude from the opening 12.

[0069] Second aspect of the embodiments

[0070] This utility model provides a motor that includes the stator assembly 100 described in the first aspect embodiment. Since the structure of the stator assembly 100 has been described in the first aspect embodiment, the content is incorporated herein and will not be repeated here.

[0071] In the above embodiments, only the structure related to the motor in the present utility model embodiment has been described. For other structures of the motor, please refer to the relevant technology, and the description is omitted here.

[0072] In the motor of this embodiment, since the stator assembly 100 described in Embodiment 1 is used, the radial strength of the wedge is increased by having a groove recessed to the other radial side at the base of the wedge opposite to the opening, thereby reducing the incidence of buckling after the stator coil is installed and preventing the stator coil from protruding or detaching from the stator core. Furthermore, since the groove is recessed to the other radial side (i.e., towards the stator coil), in other words, the base of the wedge protrudes to the other radial side (i.e., towards the stator coil), even if the groove undergoes slight deformation to the radial side after the stator coil is installed, the wedge will not protrude from the opening.

[0073] In this embodiment, the motor can be any type of motor, and the motor can be applied to any electrical product. For example, the electrical product can be a vehicle-mounted product that uses a motor, such as an automotive electronic vacuum pump, automotive brake, automotive transmission, etc.; or it can be various information devices, industrial equipment, etc. that use a motor; or it can be a household appliance such as an indoor unit of an air conditioner, an outdoor unit of an air conditioner, a water dispenser, a washing machine, a cleaning machine, a compressor, a blower, a mixer, etc.

[0074] The present invention has been described above with reference to specific embodiments. However, those skilled in the art should understand that these descriptions are exemplary and not intended to limit the scope of protection of the present invention. Those skilled in the art can make various modifications and variations to the present invention based on its spirit and principles, and these modifications and variations are also within the scope of the present invention.

Claims

1. A stator assembly, characterized in that, The stator assembly includes: The stator core includes multiple teeth, with an opening formed between the ends of two adjacent teeth on their radial sides; Stator coils, at least a portion of which are housed between two adjacent teeth; and A wedge, located on one radial side of the stator coil and on the other radial side of the opening, the wedge including a base opposite the opening, the base having a groove recessed toward the other radial side.

2. The stator assembly according to claim 1, characterized in that, The base includes a first sidewall, a second sidewall, and a bottom connecting the first sidewall and the second sidewall. The bottom is located closer to the other radial side than the first sidewall and the second sidewall. The first sidewall, the second sidewall, and the bottom form the groove.

3. The stator assembly according to claim 2, characterized in that, Viewed axially, the bottom is longer than both the first and second sidewalls.

4. The stator assembly according to claim 2, characterized in that, Viewed along the axial direction, the lengths of the first sidewall and the second sidewall are equal.

5. The stator assembly according to claim 2, characterized in that, The depth of the groove is equal at all positions along the axial direction.

6. The stator assembly according to claim 2, characterized in that, The wedge block further includes a first support portion and a second support portion, which are respectively disposed opposite to two adjacent teeth. The base portion connects the first support portion and the second support portion. The first sidewall is connected to the first support portion, and a first angle is formed at the connection point between the two. The second sidewall is connected to the second support portion, and a second angle is formed at the connection point between the two. The angle of the first angle is equal to the angle of the second angle.

7. The stator assembly according to claim 6, characterized in that, The angles of both the first angle and the second angle are less than 90 degrees.

8. The stator assembly according to claim 6, characterized in that, The greater the depth of the groove, the smaller the angles of the first angle and the second angle.

9. The stator assembly according to claim 6, characterized in that, Viewed along the axial direction, the distance between the first angle and the second angle is greater than or equal to the size of the opening.

10. A motor, characterized in that, The motor includes the stator assembly as described in any one of claims 1 to 9.

Images