Stator assembly, electric machine and electric appliance

Abstract

The utility model provides a kind of stator assembly, motor and electrical appliance, stator assembly includes casing, shock-absorbing material and stator core, stator core is located in casing and is coaxial with casing arrangement;The inner peripheral wall of casing and the outer peripheral wall of stator core form shock-absorbing space, the inner peripheral wall of casing is equipped with casing limiting slot, the outer peripheral wall of stator core is equipped with stator limiting slot, and casing limiting slot and stator limiting slot are all communicated with shock-absorbing space;Shock-absorbing space, casing limiting slot and stator limiting slot are all filled with shock-absorbing material;The shock-absorbing material in casing limiting slot is limitedly cooperated with casing in axial direction;And / or the shock-absorbing material in stator limiting slot is limitedly cooperated with stator core in axial direction.The stator assembly can achieve better shock-absorbing effect, effectively reduce motor noise, improve overall performance of motor, while axial and circumferential limiting can be realized, improve connection stability.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, specifically to a stator assembly, a motor, and electrical appliances. Background Technology

[0002] Motors inevitably vibrate during operation. To reduce vibration when the motor is under load, there are two common vibration reduction methods in the transmission path: the first is to add vibration damping rubber rings to the mounting feet of the motor housing; the second is to manufacture a vibration damping rotor.

[0003] See Figure 1 The first method involves installing a shock-absorbing rubber ring 102 on the motor housing 101. This method has the following problems: 1. Since the shock-absorbing rubber ring 102 is a flexible material and its installation position has a notch 103, there is a risk that the shock-absorbing rubber ring 102 will fall off; 2. The motor and load are mostly assembled by mounting feet and brackets, and the mounting feet are tightened to the brackets with screws. The motor screws with shock-absorbing rubber rings 102 on the mounting feet will often deform the shock absorber. Tightening the shock-absorbing rubber ring 102 too much will cause many problems: ① weakened shock absorption; ② reduced lifespan of the shock-absorbing rubber ring 102; ③ tearing at weak points of the shock-absorbing rubber ring 102. These problems will all lead to a poor shock absorption effect; 3. The installation of the shock-absorbing rubber ring 102 is mostly done manually. Adding the shock-absorbing rubber ring 102 increases the process, increases the labor time per motor, and increases the motor production cost.

[0004] See Figure 2 The second type of shock-absorbing rotor consists of inner and outer iron cores. The magnet 201 is embedded in the outer iron core 202 of the rotor. This type of rotor has a higher power density and is the rotor solution currently chosen by major manufacturers in the market. However, this type of rotor also has obvious defects: 1. The rotor needs to be inserted into the shaft and made into a rotor assembly with bearings and other parts and installed in the motor. When inserting the shaft, a press is used to press the rotor shaft into the rotor iron core. Therefore, the inner iron core 203 cannot be too small. If the inner iron core 203 is too small, it will deform due to the inability to withstand the huge pressure of the press, which will affect the concentricity of the rotor. The damping material 204, which fills the space between the inner core 203 and the outer core 202, also needs a certain thickness. The inner core 203 and the damping material 204 together limit the minimum inner diameter of the outer core 202, which further limits the radial length of the magnet 201, resulting in a decrease in rotor power density. 2. The damping material 204 in the circumferential direction of the damping rotor is filled in the nested part of the inner and outer rotors. Without extra structure to tighten the damping material 204, it is easy for the damping material 204 to separate on the circumference, causing abnormal motor quality. 3. The damping material 204 is also prone to falling off in the axial direction, which reduces the motor's damping performance. The rotor is also prone to displacement or falling off, which reduces the reliability of the motor.

[0005] In addition, there is a type of stator that reduces noise by creating vibration-damping holes inside the stator core. However, since the stator core and the housing are in rigid contact, the noise reduction effect is still poor. If vibration-damping material is filled between the stator core and the housing, since the vibration-damping material is usually made of elastic materials such as rubber, it is easy for it to move relative to the stator core or the housing in the circumferential and axial directions. Therefore, the connection stability between the two is poor, and the vibration-damping material is easy to separate from the housing or the stator core, thus affecting the motor performance. Utility Model Content

[0006] The primary objective of this invention is to provide a stator assembly that can achieve better shock absorption, effectively reduce motor noise, improve the overall performance of the motor, and simultaneously achieve axial and circumferential limiting to enhance connection stability.

[0007] The second objective of this invention is to provide a motor employing the aforementioned stator assembly.

[0008] The third objective of this invention is to provide an electrical appliance that uses the aforementioned motor.

[0009] To achieve the aforementioned first objective, this utility model provides a stator assembly, including a housing, damping material, and a stator core. The stator core is located inside the housing and is coaxially arranged with the housing. A damping space is formed between the inner peripheral wall of the housing and the outer peripheral wall of the stator core. A housing limiting groove is formed on the inner peripheral wall of the housing, and a stator limiting groove is formed on the outer peripheral wall of the stator core. Both the housing limiting groove and the stator limiting groove are connected to the damping space. The damping space, the housing limiting groove, and the stator limiting groove are all filled with damping material. The damping material in the housing limiting groove is axially positioned with the housing; and / or the damping material in the stator limiting groove is axially positioned with the stator core.

[0010] As can be seen from the above solution, by filling the damping material into the damping space formed between the inner peripheral wall of the housing and the outer peripheral wall of the stator core, the damping material can completely separate the housing and the stator core, or reduce the contact area between the stator core and the housing, so that the stator core and the housing do not contact each other at all or only partially, thereby achieving a better damping effect, effectively reducing motor noise, and improving the overall performance of the motor. Therefore, compared with the existing solution of setting damping rubber rings on the motor mounting feet, this utility model does not require the installation of damping rubber rings. The motor mounting feet can be directly fixed with screws. At the same time, a non-dampening rotor can be used, saving the space for setting damping rubber on the rotor, thereby effectively increasing the radial length space of the magnets, thereby improving the overall performance of the motor and reducing costs. This invention solves the problems of easy detachment of the damping rubber rings on the stator mounting feet in the existing technology, as well as the problems of weak damping effect, short damping life, and easy damage of the damping rubber rings used on the mounting feet. It also solves the problems of reduced motor magnet usage due to insufficient space in the rotor, easy detachment of damping material, and poor damping effect due to insufficient damping material usage in the existing technology.

[0011] Furthermore, by creating housing limiting grooves on the inner circumferential wall of the housing and stator limiting grooves on the outer circumferential wall of the stator core, and filling these grooves with damping material, the contact area between the damping material and the housing, as well as between the damping material and the stator core, is increased. This further restricts the tangential displacement between the stator core and the housing, achieving circumferential limiting and improving the adhesion between the damping material and the stator core and housing, thus enhancing structural stability and damping effect. Simultaneously, the damping material in the housing limiting groove engages with the housing in the axial direction, and the damping material in the stator limiting groove engages with the stator core in the axial direction, achieving axial limiting and improving the stability of the connection between the damping material and the stator core and housing.

[0012] A preferred embodiment is that the stator core includes a first core segment and a second core segment, which are arranged along the axial direction of the stator core; the stator limiting groove is located on the outer peripheral wall of the first core segment and extends only through the first core segment along the axial direction of the stator core.

[0013] Therefore, by setting the stator core into two or more core segments, axial limiting can be achieved between two adjacent segments by opening a stator limiting groove on only one of the core segments.

[0014] A further embodiment is that the first core segment is formed by stacking multiple first core laminations along the axial direction of the stator core, and the second core segment is formed by stacking multiple second core laminations along the axial direction of the stator core. The outer edge of the yoke of the first core lamination is provided with a first through hole. After the first core laminations are stacked, the first through holes together form a stator limiting groove. The projection of the first through hole along the axial direction of the stator core coincides with the projection of the stator limiting groove along the axial direction of the stator core.

[0015] It can be seen that by dividing the stator core into at least two sections, with each section containing core laminations having the same structure, the processing of the core laminations is facilitated, the processing technology is simplified, and thus production efficiency is improved.

[0016] A further option is that at least one of the first core segment and the second core segment is more than two, and the first core segment and the second core segment are arranged alternately along the axial direction of the stator core.

[0017] A preferred embodiment is that the number of stator limiting slots is the same as the number of teeth in the first core segment, and one stator limiting slot and one tooth in the first core segment are arranged opposite each other along the radial direction of the stator core.

[0018] Therefore, by setting the stator limiting groove at a position opposite to the stator teeth, the strength of the stator teeth can be guaranteed, and the strength of the stator teeth can be avoided by the opening of the damping holes.

[0019] A preferred embodiment is that the number of housing limiting slots is two or more, and each housing limiting slot is arranged along the circumference of the housing; and / or the number of stator limiting slots is two or more, and each stator limiting slot is arranged along the circumference of the stator core.

[0020] A preferred arrangement is that the housing limiting groove and the stator limiting groove are arranged alternately along the circumference of the stator core.

[0021] A preferred embodiment is that the cross-section of the inner peripheral wall of the housing limiting groove is a curved segment; and / or the housing limiting groove extends along the axial direction of the stator core; and / or the stator limiting groove extends along the axial direction of the stator core; and / or the cross-section of the inner peripheral wall of the stator limiting groove is a curved segment.

[0022] It can be seen that the curved cross-sections of the inner peripheral walls of the housing limiting groove and the stator limiting groove can increase the contact area between the damping material and the housing limiting groove, as well as the contact area between the damping material and the stator limiting groove, thereby improving the stability of the connection between the three and further limiting the tangential displacement between the stator core and the housing, thus improving the stability of the structure.

[0023] A further option is that the cross-section of the inner peripheral wall of the stator limiting groove is composed of a first straight line segment, a first arc segment, and a second straight line segment connected in sequence, the first arc segment being a superior arc, and the first straight line segment being arranged opposite to the second straight line segment; and / or the cross-section of the inner peripheral wall of the housing limiting groove is composed of a third straight line segment, a second arc segment, and a fourth straight line segment connected in sequence, the third straight line segment being arranged opposite to the fourth straight line segment.

[0024] A further option is that the first straight line segment is parallel to the second straight line segment, and the distance between the first straight line segment and the second straight line segment is less than the diameter of the first arc segment; and / or the third straight line segment is parallel to the fourth straight line segment, and the distance between the third straight line segment and the fourth straight line segment is less than or equal to the width of the opening of the second arc segment.

[0025] It can be seen that by setting the constricted portion formed by the first and second straight segments, as well as the constricted portion formed by the third and fourth straight segments, the possibility of the damping material in the stator limiting groove and the housing limiting groove being dislodged from the corresponding limiting groove is further reduced, and the stability of the connection between the damping material and the stator core and the housing is further improved.

[0026] A further proposed solution is to have two or more second arc segments, with each second arc segment connected sequentially.

[0027] A preferred embodiment is that the housing includes a housing portion and a positioning portion. The positioning portion protrudes radially inward from the inner peripheral wall of the housing portion. The positioning portion and the stator core are arranged opposite each other in the radial direction of the stator core. In the axial direction of the housing, the positioning portion is located in the middle of the housing portion. Both end walls of the positioning portion form a limiting groove with the housing portion. The limiting groove of the housing is located on the positioning portion and penetrates the positioning portion in the axial direction of the housing.

[0028] A further proposed solution is that the damping material includes interconnected yoke damping parts, gap damping parts, housing damping parts, and stator damping parts. The gap damping parts are located within the damping space, the housing damping parts are located within the housing limiting groove, and the stator damping parts are located within the stator limiting groove. There are two yoke damping parts, and the two yoke damping parts are located within the two limiting grooves respectively.

[0029] Therefore, by setting up the housing limiting groove and filling some of the shock-absorbing material into the housing limiting groove, the shock absorption effect can be further improved by increasing the amount of shock-absorbing adhesive.

[0030] To achieve the second objective mentioned above, this utility model provides an electric motor, including the stator assembly described above.

[0031] To achieve the third objective mentioned above, this utility model provides an electrical appliance, including the aforementioned motor. Attached Figure Description

[0032] Figure 1This is a structural diagram of the first existing type of motor.

[0033] Figure 2 This is a structural diagram of the existing second type of motor.

[0034] Figure 3 This is a structural diagram of the stator core in an embodiment of the stator assembly of this utility model.

[0035] Figure 4 This is an exploded view of the stator core structure in an embodiment of the stator assembly of this utility model.

[0036] Figure 5 This is a structural diagram of the first core lamination in an embodiment of the stator assembly of this utility model.

[0037] Figure 6 yes Figure 5 A magnified view of a portion of point A in the middle.

[0038] Figure 7 This is a structural diagram of the second core lamination in an embodiment of the stator assembly of this utility model.

[0039] Figure 8 This is a front view of the housing in an embodiment of the stator assembly of this utility model.

[0040] Figure 9 yes Figure 8 A magnified view of a section at point B.

[0041] Figure 10 This is a perspective view of the housing in an embodiment of the stator assembly of this utility model.

[0042] Figure 11 This is a structural diagram of the shock-absorbing material in an embodiment of the stator assembly of this utility model.

[0043] Figure 12 This is a cross-sectional view of the shock-absorbing material in an embodiment of the stator assembly of this utility model.

[0044] Figure 13 This is a structural diagram of the stator assembly embodiment of this utility model after being filled with shock-absorbing material.

[0045] Figure 14 This is a radial cross-sectional view of the stator assembly embodiment of this utility model at the first position.

[0046] Figure 15 yes Figure 14 A magnified view of a section at point C.

[0047] Figure 16 This is a radial cross-sectional view of the stator assembly embodiment of this utility model at the second position.

[0048] Figure 17This is an exploded view of the structure of an embodiment of the stator assembly of this utility model.

[0049] The present invention will be further described below with reference to the accompanying drawings and embodiments. Detailed Implementation

[0050] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. The descriptions of the exemplary embodiments are merely illustrative and are in no way intended to limit the present invention or its application or use. The present invention can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to make the present invention thorough and complete, and to fully express the scope of the present invention to those skilled in the art. It should be noted that, unless otherwise specifically stated, the relative arrangement of components and steps, the composition of materials, numerical expressions, and values ​​set forth in these embodiments should be interpreted as merely exemplary and not as limiting.

[0051] The terms "first," "second," and similar words used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different parts. Words such as "including" or "comprising" mean that the element preceding the word encompasses the element listed after it, and do not exclude the possibility of encompassing other elements as well. Terms such as "upper," "lower," "left," and "right" are only used to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0052] In this invention, when a specific device is described as being located between a first device and a second device, an intermediary device may or may not exist between the specific device and the first or second device. When a specific device is described as being connected to other devices, the specific device may be directly connected to the other devices without an intermediary device, or it may not be directly connected to the other devices but may have an intermediary device.

[0053] All terms used in this invention (including technical or scientific terms) have the same meaning as understood by one of ordinary skill in the art, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries should be interpreted as having the meaning consistent with their meaning in the context of the relevant art, and not as having an idealized or highly formalized meaning, unless expressly defined herein.

[0054] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0055] Stator assembly example: See Figures 3 to 17The stator assembly in this embodiment includes a housing 1, a stator core 2, an insulating frame 3, a stator winding 4, and a shock-absorbing material 6. Preferably, the shock-absorbing material 6 is shock-absorbing rubber.

[0056] The stator core 2 is located inside the housing 1 and is coaxially arranged with the housing 1. The stator core 2 includes a stator yoke 21 and a plurality of stator teeth 22. Each stator tooth 22 is arranged on the radial inner side of the stator yoke 21 and extends along the radial direction of the stator core 2. In this embodiment, there are 12 stator teeth 22, which are evenly arranged along the inner peripheral wall of the stator yoke 21.

[0057] A damping space 7 is formed between the inner peripheral wall of the housing 1 and the outer peripheral wall of the stator core 2. Part of the damping material 6 fills the damping space 7, and the damping material 6 completely fills the damping space 7, thus separating the housing 1 from the stator core 2. In other embodiments, the damping material 6 may only fill a portion of the damping space 7.

[0058] like Figures 8 to 10 ,as well as Figures 14 to 16 A housing limiting groove 11 is formed on the inner peripheral wall of the housing 1, and a stator limiting groove 25 is formed on the outer peripheral wall of the stator core 2. Both the housing limiting groove 11 and the stator limiting groove 25 are connected to the damping space 7. The damping space 7, the housing limiting groove 11, and the stator limiting groove 25 are all filled with damping material 6. The damping material 6 in the housing limiting groove 11 is axially limited to the housing 1, and / or, the damping material 6 in the stator limiting groove 25 is axially limited to the stator core 2. In this embodiment, the housing limiting groove 11 is columnar and does not form a limiting structure in the axial direction; only the damping material 6 in the stator limiting groove 25 forms a limiting fit with the stator core 2 in the axial direction.

[0059] The housing 1 includes a housing portion 12 and a positioning portion 13. The positioning portion 13 protrudes radially inward from the inner peripheral wall of the housing portion 12. The positioning portion 13 and the stator core 2 are arranged opposite each other in the radial direction of the stator core 2. In the axial direction of the housing 1, the positioning portion 13 is located in the middle of the housing portion 12. The two end walls of the positioning portion 13 and the housing portion 12 form a limiting groove 14. The housing limiting groove 11 is located on the positioning portion 13 and passes through the positioning portion 13 in the axial direction. There are two or more housing limiting grooves 11. Each housing limiting groove 11 is arranged along the circumference of the housing 1. In this embodiment, there are 12 housing limiting grooves 11. The 12 housing limiting grooves 11 are evenly arranged along the circumference of the housing 1.

[0060] See Figures 3 to 7The stator core 2 includes a first core segment 23 and a second core segment 24 arranged coaxially. The first core segment 23 and the second core segment 24 are arranged along the axial direction of the stator core 2. At least one of the first core segment 23 and the second core segment 24 is more than two. The first core segment 23 and the second core segment 24 are arranged alternately along the axial direction of the stator core 2. In this embodiment, there are two first core segments 23 and one second core segment 24. The two first core segments 23 are respectively disposed at both ends of the second core segment 24 along the axial direction of the stator core 2. The first core segment 23 is formed by stacking multiple first core laminations 230 along the axial direction of the stator core 2, and the second core segment 24 is formed by stacking multiple second core laminations 240 along the axial direction of the stator core 2. The outer diameter of the first core segment 23 is equal to the outer diameter of the second core segment 24, and the inner diameter of the first core segment 23 is equal to the inner diameter of the second core segment 24.

[0061] See Figure 5 and Figure 6 The outer edge of the yoke of the first core lamination 230 is provided with a first through hole 231. After the first core laminations 230 are stacked, the first through holes 231 together form the stator limiting groove 25 mentioned above. The projection of the first through hole 231 along the axial direction of the stator core 2 coincides with the projection of the stator limiting groove 25 along the axial direction of the stator core 2.

[0062] The stator limiting groove 25 is located on the outer peripheral wall of the first core segment 23 and penetrates only the first core segment 23 along the axial direction of the stator core 2. There are two or more stator limiting grooves 25, each arranged circumferentially around the stator core 2. In this embodiment, 12 stator limiting grooves 25 are provided on one first core segment 23, and these 12 grooves are evenly arranged circumferentially around the stator core 2. The housing limiting grooves 11 and the stator limiting grooves 25 are arranged alternately along the circumferential direction of the stator core 2, and the stator limiting grooves 25 on two first core segments 23 are correspondingly arranged one-to-one along the axial direction of the stator core 2. The number of stator limiting grooves 25 is the same as the number of teeth on the first core segment 23, and one stator limiting groove 25 and one tooth of one first core segment 23 are arranged radially opposite each other along the stator core 2. By positioning the stator limiting groove 25 opposite to the stator teeth 22, the strength of the stator teeth 22 can be guaranteed, preventing the opening of the damping holes from affecting the strength of the stator teeth 22. Furthermore, no stator limiting grooves are provided on the outer peripheral wall of the second core section 24, allowing the damping material 6 within the stator limiting groove 25 of the first core section 23 to cooperate with the yoke of the second core section 24, thereby achieving axial positioning of the damping material 6 within the stator limiting groove 25.

[0063] The housing limiting groove 11 extends along the axial direction of the stator core 2, and the cross-section of the inner peripheral wall of the housing limiting groove 11 is a curved segment. The stator limiting groove 25 extends along the axial direction of the stator core 2, and the cross-section of the inner peripheral wall of the stator limiting groove 25 is also a curved segment. The curved cross-section of the inner peripheral wall of the housing limiting groove 11 and the stator limiting groove 25 increases the contact area between the damping material 6 and the housing limiting groove 11, as well as the contact area between the damping material 6 and the stator limiting groove 25, improving the stability of the connection between the three, thereby further limiting the tangential displacement between the stator core 2 and the housing 1 and improving the stability of the structure. Specifically, the inner peripheral wall of the first through hole 231, that is, the cross-section of the inner peripheral wall of the stator limiting groove 25, is composed of a first straight segment 251, a first arc segment 252, and a second straight segment 253 connected in sequence. The first arc segment 252 is a superior arc, and the first straight segment 251 and the second straight segment 253 are arranged opposite to each other. See also Figure 9 The cross-section of the inner peripheral wall of the housing limiting groove 11 is composed of a third straight segment 111, a second arc segment 112, and a fourth straight segment 113 connected in sequence, with the third straight segment 111 and the fourth straight segment 113 arranged opposite to each other. In this embodiment, there are two or more second arc segments 112, and the second arc segments 112 are connected in sequence. In this embodiment, there are three second arc segments 112.

[0064] In this embodiment, the first straight segment 251 is parallel to the second straight segment 253, and the distance between the first straight segment 251 and the second straight segment 253 is less than the diameter of the first arc segment 252. The third straight segment 111 is parallel to the fourth straight segment 113, and the distance between the third straight segment 111 and the fourth straight segment 113 is less than or equal to the width of the opening of the second arc segment 112. There are two or more second arc segments 112, and each second arc segment 112 is connected sequentially. By setting the constricted portion formed by the first straight segment 251 and the second straight segment 253, and the constricted portion formed by the third straight segment 111 and the fourth straight segment 113, the possibility of the damping material 6 in the stator limiting groove 25 and the housing limiting groove 11 coming out of the corresponding limiting groove is further reduced, and the stability of the connection between the damping material 6 and the stator core 2 and the housing 1 is further improved.

[0065] By setting a stator limiting groove 25 in the stator yoke 21 of the stator core 2 and a housing limiting groove 11 on the inner peripheral wall of the housing 1, and filling the limiting groove with damping materials 6 such as damping rubber, the damping rubber can effectively absorb the vibration energy of different vibration modes, thereby reducing the vibration and noise during motor operation. At the same time, by filling the damping material 6 into the damping space 7 formed between the inner peripheral wall of the housing 1 and the outer peripheral wall of the stator core 2, and by allowing it to flow into the stator limiting groove 25 and the housing limiting groove 11 during the filling process, a through-type damping structure is formed, which in turn forms an integral damping network structure, enhancing the overall damping characteristics of the motor and significantly reducing the vibration and noise during motor operation.

[0066] See Figures 11 to 16 The damping material 6 includes a stator damping part 61, a yoke damping part 62, a gap damping part 63, and a housing damping part 64 that are connected to each other.

[0067] Two yoke damping parts 62 are respectively located in the limiting grooves 14 of the two housings 1, and the yoke damping parts 62 cover the two axial ends of the stator yoke 21 of the stator core 2 and the two axial ends of the positioning part 13. The gap damping part 63 is located in the damping space 7, the housing damping part 64 is located in the housing limiting groove 11, and the stator damping part 61 is located in the stator limiting groove 25.

[0068] As can be seen from the above, by filling the damping material into the damping space formed between the inner peripheral wall of the housing and the outer peripheral wall of the stator core, the damping material can completely separate the housing and the stator core, or reduce the contact area between the stator core and the housing, so that the stator core and the housing do not contact each other at all or only partially, thereby achieving a better damping effect, effectively reducing motor noise, and improving the overall performance of the motor. Therefore, compared with the existing solution of setting damping rubber rings on the motor mounting feet, this utility model does not require the installation of damping rubber rings. The motor mounting feet can be directly fixed with screws. At the same time, a non-dampening rotor can be used, saving the space for setting damping rubber on the rotor, thereby effectively increasing the radial length space of the magnets, thereby improving the overall performance of the motor and reducing costs. This invention solves the problems of easy detachment of the damping rubber rings on the stator mounting feet in the existing technology, as well as the problems of weak damping effect, short damping life, and easy damage of the damping rubber rings used on the mounting feet. It also solves the problems of reduced motor magnet usage due to insufficient space in the rotor, easy detachment of damping material, and poor damping effect due to insufficient damping material usage in the existing technology.

[0069] Furthermore, by creating housing limiting grooves on the inner circumferential wall of the housing and stator limiting grooves on the outer circumferential wall of the stator core, and filling these grooves with damping material, the contact area between the damping material and the housing, as well as between the damping material and the stator core, is increased. This further restricts the tangential displacement between the stator core and the housing, achieving circumferential limiting and improving the adhesion between the damping material and the stator core and housing, thus enhancing structural stability and damping effect. Simultaneously, the damping material in the housing limiting groove engages with the housing in the axial direction, and the damping material in the stator limiting groove engages with the stator core in the axial direction, achieving axial limiting and improving the stability of the connection between the damping material and the stator core and housing.

[0070] In other embodiments, the number of stator limiting slots on each first core segment can be unequal, and their arrangement and shape can also be different. Stator limiting slots can also be formed on the second core segment, and the stator limiting slots on the second core segment and the stator limiting slots on the first core segment are staggered in the circumferential direction of the stator core, or they can be arranged opposite each other along the axial direction of the stator core with unequal dimensions, thereby creating axial limiting for the damping material within the slots. The number, shape, size, and arrangement of the stator limiting slots and the housing limiting slots can all be changed as needed. Limiting protrusions can also be provided within the housing limiting slots, dividing the corresponding housing limiting slots into at least two slot segments arranged along the axial direction of the stator core, thereby achieving axial limiting. The above modifications also achieve the purpose of this utility model.

[0071] Motor Example: The motor in this embodiment includes the stator assembly in the stator assembly embodiment described above.

[0072] Electrical Example: The electrical appliance in this embodiment includes the motor in the above-described motor embodiment.

[0073] Finally, it should be emphasized that the above are only preferred embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, the present utility model can have various changes and modifications. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A stator assembly, comprising a housing, damping material, and a stator core, wherein the stator core is located within the housing and is coaxially arranged with the housing; Its features : A shock-absorbing space is formed between the inner peripheral wall of the housing and the outer peripheral wall of the stator core. A housing limiting groove is provided on the inner peripheral wall of the housing, and a stator limiting groove is provided on the outer peripheral wall of the stator core. Both the housing limiting groove and the stator limiting groove are connected to the shock-absorbing space. The shock-absorbing space, the housing limiting groove, and the stator limiting groove are all filled with the shock-absorbing material; The damping material in the housing limiting groove is axially positioned with the housing; and / or The damping material in the stator limiting groove is axially positioned and matched with the stator core.

2. The stator assembly according to claim 1, characterized in that: The stator core includes a first core segment and a second core segment, which are arranged along the axial direction of the stator core. The stator limiting groove is located on the outer peripheral wall of the first core segment and extends only through the first core segment along the axial direction of the stator core.

3. The stator assembly according to claim 2, characterized in that: The first core segment is formed by stacking multiple first core laminations along the axial direction of the stator core, and the second core segment is formed by stacking multiple second core laminations along the axial direction of the stator core. The outer edge of the yoke of the first core lamination is provided with a first through hole. After the first core laminations are stacked, each of the first through holes together forms the stator limiting groove. The projection of the first through hole along the axial direction of the stator core coincides with the projection of the stator limiting groove along the axial direction of the stator core.

4. The stator assembly according to claim 2, characterized in that: The number of at least one of the first core segment and the second core segment is more than two, and the first core segment and the second core segment are arranged alternately along the axial direction of the stator core.

5. The stator assembly according to any one of claims 2 to 4, characterized in that: The number of stator limiting slots is the same as the number of teeth in the first core segment, and one stator limiting slot and one tooth of the first core segment are arranged opposite each other along the radial direction of the stator core.

6. The stator assembly according to any one of claims 1 to 4, characterized in that: The number of housing limiting grooves is two or more, and each housing limiting groove is arranged along the circumference of the housing; and / or The number of stator limiting slots is two or more, and each stator limiting slot is arranged along the circumference of the stator core.

7. The stator assembly according to claim 6, characterized in that: The housing limiting groove and the stator limiting groove are arranged alternately along the circumference of the stator core.

8. The stator assembly according to any one of claims 1 to 4, characterized in that: The cross-section of the inner peripheral wall of the housing limiting groove is a curved segment; and / or The housing limiting groove extends along the axial direction of the stator core; and / or The stator limiting groove extends along the axial direction of the stator core; and / or The cross-section of the inner peripheral wall of the stator limiting groove is a curved segment.

9. The stator assembly according to claim 8, characterized in that: The cross-section of the inner peripheral wall of the stator limiting groove is composed of a first straight segment, a first arc segment, and a second straight segment connected in sequence. The first arc segment is a superior arc, and the first straight segment and the second straight segment are arranged opposite to each other; and / or The cross-section of the inner peripheral wall of the housing limiting groove is composed of a third straight line segment, a second arc segment and a fourth straight line segment connected in sequence, with the third straight line segment and the fourth straight line segment being arranged opposite to each other.

10. The stator assembly according to claim 9, characterized in that: The first straight line segment is parallel to the second straight line segment, and the distance between the first straight line segment and the second straight line segment is less than the diameter of the first arc segment; and / or The third straight line segment is parallel to the fourth straight line segment, and the distance between the third straight line segment and the fourth straight line segment is less than or equal to the width of the opening of the second arc segment.

11. The stator assembly according to claim 9, characterized in that: The second arc segment has two or more segments, and each segment of the second arc segment is connected sequentially.

12. The stator assembly according to any one of claims 1 to 4, characterized in that: The housing includes a housing portion and a positioning portion. The positioning portion protrudes radially inward from the inner peripheral wall of the housing portion. The positioning portion and the stator core are arranged opposite each other in the radial direction of the stator core. In the axial direction of the housing, the positioning portion is located in the middle of the housing portion. Both end walls of the positioning portion form a limiting groove with the housing portion. The limiting groove of the housing is located on the positioning portion and penetrates the positioning portion in the axial direction of the housing.

13. The stator assembly according to claim 12, characterized in that: The damping material includes interconnected yoke damping parts, gap damping parts, housing damping parts, and stator damping parts. The gap damping parts are located within the damping space, the housing damping parts are located within the housing limiting groove, and the stator damping parts are located within the stator limiting groove. There are two yoke damping parts, and the two yoke damping parts are located within the two limiting grooves respectively.

14. An electric motor, characterized in that, Includes the stator assembly as described in any one of claims 1 to 13.

15. An electrical appliance, characterized in that, Including the motor as described in claim 14.

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