Stator core, stator assembly, electric machine and electric appliance

Abstract

The utility model provides a kind of stator core, stator assembly, motor and electrical appliance, stator core includes the first core section and the second core section being arranged along the axial direction of stator core, first core punching sheet is equipped with first through-hole on yoke, second core punching sheet is equipped with second through-hole on yoke, core punching sheet is stacked, each first through-hole is jointly formed first shock-absorbing material filling hole, each second through-hole is jointly formed second shock-absorbing material filling hole, two shock-absorbing material filling holes are communicated;Along the axial direction of stator core, the projection of first through-hole coincides with the projection of first shock-absorbing material filling hole, the projection of second through-hole coincides with the projection of second shock-absorbing material filling hole, the projection of first shock-absorbing material filling hole does not coincide with the projection of second shock-absorbing material filling hole.The stator core can effectively absorb vibration energy of different vibration modes, reduce motor noise, prevent shock-absorbing material from falling off, while simplifying structure, reducing process difficulty, reducing production cost.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, specifically to a stator core, stator assembly, 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 stator core that reduces noise by opening vibration damping holes inside the stator core. However, if the vibration damping holes are straight holes, the damping material is easy to fall out of the holes when the motor vibrates during operation. If the vibration damping holes are irregular holes, since the stator core is made of stacked core laminations, the different positions of the through holes on each core lamination will increase the difficulty of the process, thereby reducing production efficiency and increasing production costs. Utility Model Content

[0006] The primary objective of this invention is to provide a stator core that can effectively absorb vibration energy of different vibration modes, reduce motor noise, prevent damping materials from falling off, and at the same time simplify the structure, reduce the difficulty of the process, and reduce production costs.

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

[0008] The third objective of this invention is to provide a motor employing the aforementioned stator assembly.

[0009] The fourth objective of this invention is to provide an electrical appliance that uses the aforementioned motor.

[0010] To achieve the aforementioned first objective, this utility model provides a stator core, comprising a first core segment and a second core segment arranged along the axial direction of the stator core. 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. A first through hole is provided on the yoke of the first core lamination. After the first core laminations are stacked, each first through hole together forms a first damping material filling hole, which penetrates the first core segment along the axial direction of the stator core. A second through hole is provided on the yoke of the second core lamination. After the second core laminations are stacked, the second through holes together form a second damping material filling hole. The second damping material filling hole passes through the second core section along the axial direction of the stator core and is connected to the first damping material filling hole. Along the axial direction of the stator core, the projection of the first through hole coincides with the projection of the first damping material filling hole, the projection of the second through hole coincides with the projection of the second damping material filling hole, and the projection of the first damping material filling hole does not coincide with the projection of the second damping material filling hole.

[0011] As can be seen from the above scheme, by dividing the stator core into at least two segments, with each segment containing identical core laminations, the processing of the core laminations is facilitated, simplifying the manufacturing process and thus improving production efficiency. Simultaneously, since the projections of the first and second damping material filling holes along the axial direction of the stator core do not coincide, when damping material is filled, the damping material in the first and second through holes forms a limiting structure along the axial direction of the stator core, preventing the damping material from falling out of the through holes. Furthermore, by providing damping material filling holes in the stator yoke and filling these holes with damping materials such as damping rubber, the damping rubber can effectively absorb vibration energy from different vibration modes, thereby reducing vibration and noise during motor operation. This solves the problems of easy detachment of the shock-absorbing rubber rings on the stator mounting feet in the existing technology, as well as the problems of weak shock absorption, short shock absorption life, and easy damage of the shock-absorbing 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 shock-absorbing materials, and poor shock absorption effect due to insufficient use of shock-absorbing materials in the existing technology.

[0012] A preferred embodiment is that the second through hole extends circumferentially along the second core lamination; and / or the first through hole is rectangular or circular.

[0013] Therefore, the second through hole is designed as a long strip, arc, or ring extending circumferentially along the second iron core lamination, which simplifies the difficulty of opening the second through hole. Larger second through holes are easier to process, and the amount of damping material filling the second through hole can be increased, thereby further improving the damping effect.

[0014] A further design is to have the second through hole in the shape of an annulus and set at the same center as the second iron core lamination, with the second through hole located in the radial middle of the yoke of the second iron core lamination.

[0015] As can be seen, the second through hole divides the yoke into two spaced-apart parts, which are separated by a damping material, further reducing the transmission of vibration and improving the damping effect. At the same time, the second through hole is located in the radial middle of the yoke of the second core lamination, which can ensure the overall strength of the second core section.

[0016] A further embodiment is that a third through hole is provided on the yoke of the first core lamination. After the first core laminations are stacked, the third through holes together form a third damping material filling hole, which penetrates the first core segment along the axial direction of the stator core; and / or a fourth through hole is provided on the yoke of the second core lamination. After the second core laminations are stacked, the fourth through holes together form a fourth damping material filling hole, which penetrates the second core segment along the axial direction of the stator core.

[0017] It is evident that the inclusion of the third and fourth damping material filling holes can further increase the amount of damping material inside the stator core, thereby improving the damping effect as needed.

[0018] A further embodiment is that the fourth damping material filling hole is connected to the third damping material filling hole; the third through hole and the first through hole are arranged along the radial direction of the stator core, and the fourth through hole and the second through hole are arranged along the radial direction of the stator core; in the radial direction of the stator core, the third through hole is located on the side of the first through hole away from the central axis of the stator core, and the fourth through hole is located on the side of the second through hole away from the central axis of the stator core.

[0019] As can be seen, the fourth damping material filling hole is connected to the third damping material filling hole, which allows the internally filled damping material to flow smoothly in each damping material filling hole. After the damping material cools and solidifies, it forms an integral damping network structure, which further enhances the overall damping characteristics of the motor, thereby significantly reducing the vibration and noise during motor operation.

[0020] A further proposed solution is to connect the third damping material filling hole with the second damping material filling hole.

[0021] Therefore, by connecting the third damping material filling hole with the second damping material filling hole, the damping material can flow smoothly within the damping material filling hole when filling.

[0022] A further design involves providing a fifth through hole on the yoke of the first core lamination. After the first core laminations are stacked, all the fifth through holes together form a fifth damping material filling hole. The fifth damping material filling hole penetrates the first core segment along the axial direction of the stator core and communicates with the second damping material filling hole. The first and third damping material filling holes are arranged circumferentially along the first core segment. In the circumferential direction of the first core segment, the fifth damping material filling hole is located between the first and third damping material filling holes. In the radial direction of the first core segment, the fifth damping material filling hole is closer to the central axis of the first core segment than the first damping material filling hole.

[0023] Therefore, the setting of the fifth damping material filling hole can further increase the amount of damping material inside the stator core, thereby improving the damping level as needed.

[0024] A preferred embodiment is that the number of first damping material filling holes is two or more, and each first damping material filling hole is arranged along the circumference of the first iron core segment. The number of second damping material filling holes is the same as the number of first damping material filling holes, and the second damping material filling holes are set in a one-to-one correspondence with the first damping material filling holes. Alternatively, the number of first damping material filling holes is two or more, and each first damping material filling hole is arranged along the circumference of the first iron core segment. The number of second damping material filling holes is one, and along the axial direction of the stator iron core, the projection of each first damping material filling hole is located within the projection of the second damping material filling hole.

[0025] Therefore, by setting multiple first damping material filling holes and second damping material filling holes, the amount of damping material can be increased as needed, thereby further enhancing the damping performance.

[0026] A further option is that the number of first damping material filling holes is the same as the number of stator teeth, and one first damping material filling hole and one stator tooth are arranged opposite each other along the radial direction of the stator core.

[0027] Therefore, by setting the first damping material filling hole 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 due to the opening of the damping hole.

[0028] A preferred embodiment 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.

[0029] To achieve the second objective mentioned above, this utility model provides a stator assembly, including damping material and the aforementioned stator core, wherein at least a portion of the damping material is filled in the first damping material filling hole and the second damping material filling hole.

[0030] In a preferred embodiment, the stator assembly further includes a housing, with the stator core located inside the housing and 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, and some damping material is filled in the damping space.

[0031] Therefore, 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 separates the housing and the stator core, so that the stator core and the housing do not come into contact at all, thereby achieving a better damping effect, effectively reducing motor noise, and improving the overall performance of the motor.

[0032] A further option is to have a damping groove on at least one of the inner peripheral wall of the housing and the outer peripheral wall of the stator core, with the damping groove communicating with the damping space and some damping material filling the damping groove.

[0033] Therefore, by opening damping grooves on the inner peripheral wall of the housing and / or the outer peripheral wall of the stator core, and filling the damping grooves with damping material, the contact area between the damping material and the housing and / or the stator core is increased. At the same time, the tangential displacement between the stator core and the housing is further restricted, and the adhesion between the damping material and the stator core and housing is also improved, thereby improving the stability and damping effect of the structure.

[0034] To achieve the third objective mentioned above, this utility model provides an electric motor, including the stator assembly described above.

[0035] To achieve the fourth objective mentioned above, this utility model provides an electrical appliance, including the aforementioned motor. Attached Figure Description

[0036] Figure 1 This is a structural diagram of the first existing type of motor.

[0037] Figure 2 This is a structural diagram of the existing second type of motor.

[0038] Figure 3 This is a structural diagram of the stator core in the first embodiment of the stator assembly of this utility model.

[0039] Figure 4 This is an exploded view of the stator core structure in the first embodiment of the stator assembly of this utility model.

[0040] Figure 5 This is a structural diagram of the first core lamination in the first embodiment of the stator assembly of the present invention.

[0041] Figure 6 This is a structural diagram of the second core lamination in the first embodiment of the stator assembly of the present invention.

[0042] Figure 7 This is a perspective view of the housing in the first embodiment of the stator assembly of this utility model.

[0043] Figure 8 This is a structural diagram of the shock-absorbing material in the first embodiment of the stator assembly of this utility model.

[0044] Figure 9 This is a cross-sectional view of the damping material in the first embodiment of the stator assembly of this utility model.

[0045] Figure 10 This is a radial cross-sectional view of the first embodiment of the stator assembly of this utility model at the first position.

[0046] Figure 11 This is the first embodiment of the stator assembly of this utility model. Figure 10 Cross-sectional view at point AA.

[0047] Figure 12This is a radial cross-sectional view of the first embodiment of the stator assembly of this utility model at the second position.

[0048] Figure 13 This is an exploded view of the structure of the first embodiment of the stator assembly of this utility model.

[0049] Figure 14 This is a structural diagram of the first core lamination in the second embodiment of the stator core of this utility model.

[0050] Figure 15 This is a structural diagram of the second core lamination in the second embodiment of the stator core of this utility model.

[0051] Figure 16 These are radial cross-sectional views and partial enlarged views of the second embodiment of the stator assembly of this utility model.

[0052] Figure 17 This is an exploded view of the stator core structure in the third embodiment of the stator assembly of this utility model.

[0053] Figure 18 This is a structural diagram of the first core lamination in the third embodiment of the stator assembly of this utility model.

[0054] Figure 19 This is a structural diagram of the second core lamination in the third embodiment of the stator assembly of this utility model.

[0055] Figure 20 This is a structural diagram of the shock-absorbing material in the third embodiment of the stator assembly of this utility model.

[0056] Figure 21 This is a radial cross-sectional view of the third embodiment of the stator assembly of this utility model at the first position.

[0057] Figure 22 This is the third embodiment of the stator assembly of this utility model. Figure 21 Cross-sectional view at point BB.

[0058] Figure 23 This is a radial cross-sectional view of the third embodiment of the stator assembly of this utility model at the second position.

[0059] The present invention will be further described below with reference to the accompanying drawings and embodiments. Detailed Implementation

[0060] 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.

[0061] 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.

[0062] 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.

[0063] 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.

[0064] 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.

[0065] First embodiment of stator core and stator assembly: See Figures 3 to 13 The 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.

[0066] 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.

[0067] 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 is filled in the damping space 7 and the damping material 6 fills the entire damping space 7. The damping material 6 separates the housing 1 from the stator core 2.

[0068] like Figure 7 and Figure 10 At least one of the inner peripheral wall of the housing 1 and the outer peripheral wall of the stator core 2 is provided with a damping groove 11. The damping groove 11 communicates with the damping space 7, and part of the damping material 6 is filled in the damping groove 11. In this embodiment, multiple damping grooves 11 are provided only on the inner peripheral wall of the housing 1, and each damping groove 11 extends along the axial direction of the stator core 2 and is evenly arranged along the circumference of the housing 1. By providing damping grooves 11 on the inner peripheral wall of the housing 1 and / or the outer peripheral wall of the stator core 2, and filling the damping grooves 11 with damping material 6, the contact area between the damping material 6 and the housing 1 and / or the stator core 2 is increased. At the same time, the tangential displacement between the stator core 2 and the housing 1 is further restricted, and the adhesion between the damping material 6 and the stator core 2 and the housing 1 is also improved, thereby improving the stability of the structure and the damping effect. Preferably, the cross-section of the inner peripheral wall of the damping groove 11 is a curved segment. In this embodiment, the shape of the damping groove 11 is plum blossom-shaped. The curved cross-section of the inner peripheral wall of the damping groove 11 can increase the contact area between the damping material 6 and the damping groove 11, improve the connection stability between the two, and further limit the tangential displacement between the stator core 2 and the housing 1, thereby improving the stability of the structure. In other embodiments, the number, shape, and size of the damping grooves 11 can be changed as needed.

[0069] See Figures 3 to 6The stator core 2 includes a first core segment 23 and a second core segment 24, which are arranged along the axial direction of the stator core 2. At least one of the first core segments 23 and the second core segment 24 is more than two. The first core segments 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 located 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 233 along the axial direction of the stator core 2, and the second core segment 24 is formed by stacking multiple second core laminations 242 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.

[0070] The first core lamination 233 has a first through hole 2331 and a third through hole 2332 on its yoke. After the first core laminations 233 are stacked, each first through hole 2331 together forms a first damping material filling hole 231, and each third through hole 2332 together forms a third damping material filling hole 232. Both the first damping material filling hole 231 and the third damping material filling hole 232 penetrate the first core section 23 along the axial direction of the stator core 2. On the stator core 2, a first damping material filling hole 231 and a third damping material filling hole 232 form a damping hole group 230. There are two or more damping hole groups 230, and each damping hole group 230 is evenly arranged along the circumference of the first core segment 23. In this embodiment, the number of damping hole groups 230 is the same as the number of stator teeth 22, both being 12. Each damping hole group 230 and each stator tooth 22 is arranged radially opposite to each other on the stator core 2. The first damping material filling hole 231 and the third damping material filling hole 232 in the same group are arranged close to each other and radially along the stator core 2, each opposite to a stator tooth 22. By placing the first damping material filling hole 231 opposite to the stator tooth 22, the strength of the stator tooth 22 can be guaranteed, and the strength of the stator tooth 22 can be avoided due to the opening of the damping material filling hole.

[0071] A second through hole 2421 is provided on the yoke of the second core lamination 242. After the second core laminations 242 are stacked, all the second through holes 2421 together form a second damping material filling hole 241. The second damping material filling hole 241 penetrates the second core section 24 along the axial direction of the stator core 2. The number of second damping material filling holes 241 is the same as the number of damping hole groups 230, and the second damping material filling holes 241 and damping hole groups 230 are arranged in a one-to-one correspondence. In this embodiment, the first damping material filling hole 231 and the third damping material filling hole 232 are both connected to the second damping material filling hole 241.

[0072] Along the axial direction of the stator core 2, the projection of the first through hole 2331 coincides with the projection of the first damping material filling hole 231, the projection of the second through hole 2421 coincides with the projection of the second damping material filling hole 241, and the projections of the first damping material filling hole 231 and the second damping material filling hole 241 do not coincide. That is, the structures of each first core lamination 233 are completely identical, and the structures of each second core lamination 242 are completely identical, but the structures of the first core lamination 233 and the second core lamination 242 are different. In this embodiment, the first through hole 2331 and the third through hole 2332 are both square, and the second through hole 2421 is rectangular. The first damping material filling hole 231 and the third damping material filling hole 232 are both opposite to the second damping material filling hole 241 along the axial direction of the stator core 2, and the projections of the first damping material filling hole 231 and the third damping material filling hole 232 along the axial direction of the stator core 2 are both located within the second damping material filling hole 241.

[0073] After the damping material 6 is filled into the damping material filling holes, the damping material 6 in the two damping material filling holes of the first iron core section 23 cooperates with the damping material 6 in the damping material filling holes of the second iron core section 24 to achieve axial positioning of the stator iron core 2. At the same time, by opening a larger second damping material filling hole 241, the amount of damping rubber is increased, thereby improving the damping capacity. In addition, by setting damping material filling holes in the stator yoke 21 of the stator iron core 2 and filling the damping material filling holes with damping material 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 iron core 2, and by allowing it to flow into the damping material filling holes 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 thus significantly reducing the vibration and noise during motor operation.

[0074] See Figures 8 to 13 The damping material 6 includes interconnected filling hole damping part 61, yoke damping part 62, gap damping part 63 and groove damping part 64.

[0075] 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 radially to the stator core 2. Axially, 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 damping groove 11 is located on the positioning portion 13 and penetrates the positioning portion axially. The filling hole damping portion 61 is located in each damping material filling hole. The two yoke damping portions 62 are located in the two limiting grooves 14 respectively, and the yoke damping portions 62 cover the two axial ends of the stator yoke 21 of the stator core 2 and the two axial ends of the positioning portion 13. The gap damping portion 63 is located in the damping space 7, and the groove damping portion 64 is located in the damping groove 11.

[0076] As can be seen from the above, by dividing the stator core into at least two segments, with each segment containing identical core laminations, the processing of the core laminations is facilitated, simplifying the manufacturing process and thus improving production efficiency. Simultaneously, since the projections of the first and second damping material filling holes along the axial direction of the stator core do not coincide, when damping material is filled, the damping material in the first and second through holes forms a limiting structure along the axial direction of the stator core, preventing the damping material from falling out of the through holes. Furthermore, by providing damping material filling holes in the stator yoke and filling these holes with damping materials such as damping rubber, the damping rubber can effectively absorb vibration energy from different vibration modes, thereby reducing vibration and noise during motor operation. This solves the problems of easy detachment of the damping rubber ring on the stator mounting foot in the existing technology, as well as the problems of weak damping effect, short damping life and easy damage of the damping rubber ring used on the mounting foot. 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.

[0077] Second embodiment of stator core and stator assembly: As a description of the second embodiment of the stator core and stator assembly of this utility model, the following description only focuses on the differences from the first embodiment of the stator core and stator assembly described above.

[0078] See Figures 14 to 16In this embodiment, a fifth through hole 3341 is also provided on the yoke of the first core lamination 334. After the first core laminations 334 are stacked, the fifth through holes 3341 together form a fifth damping material filling hole 333. The fifth damping material filling hole 333 penetrates the first core segment 323 in the axial direction of the stator core 320. The fifth damping material filling hole 333 is also connected to the second damping material filling hole 341. In this embodiment, the first through hole 331 and the third through hole 332 are arranged along the circumference of the first core lamination 334, that is, the first damping material filling hole and the third damping material filling hole are arranged along the circumference of the first core segment 323.

[0079] In the circumferential direction of the first core segment 323, the fifth damping material filling hole 333 is located between the first damping material filling hole and the third damping material filling hole. In the radial direction of the first core segment 323, the fifth damping material filling hole 333 is closer to the central axis of the first core segment 323 than the first and third damping material filling holes. That is, in the same damping hole group, the cross-sections of the first, third, and fifth damping material filling holes 333 are all approximately square and arranged in a triangular pattern. The cross-section of the second damping material filling hole 341 is T-shaped. The first, third, and fifth damping material filling holes 333 are all opposite to the second damping material filling hole 341 along the axial direction of the stator core 320, and the projections of the first, third, and fifth damping material filling holes 333 along the axial direction of the stator core 320 are all located within the second damping material filling hole 341.

[0080] Third embodiment of stator core and stator assembly: As a description of the third embodiment of the stator core and stator assembly of this utility model, the following description only focuses on the differences from the first embodiment of the stator core and stator assembly described above.

[0081] See Figures 17 to 23In this embodiment, there is one second damping material filling hole 441. The second through hole 442 extends circumferentially along the second iron core lamination 440. In this embodiment, the second through hole 442 is annular and co-centered with the second iron core lamination 440. The second through hole 442 is located in the radial middle of the yoke of the second iron core lamination 440. Similar to Embodiment 1, in this embodiment, both the first through hole 431 and the third through hole 434 are square. The first through hole 431 can also be rectangular, circular, or other shapes. The second through hole 442 is set as a long strip, arc, or ring extending circumferentially along the second iron core lamination 440, thereby simplifying the difficulty of opening the second through hole 442. The larger size of the second through hole 442 is easier to process, and it can also increase the filling amount of damping material 46 in the second damping material filling hole 441, thereby further improving the damping effect. The second through hole 442 divides the yoke portion of the second core segment 40 into two spaced-apart parts, separated by a damping material 46. This further reduces vibration transmission and improves the damping effect. Simultaneously, the second through hole 442 is located in the radial center of the yoke portion of the second core lamination 440, ensuring the overall strength of the second core segment 40. In other embodiments, the number of second damping material filling holes 441 can be two or more, each second damping material filling hole 441 being arc-shaped, concentric, and spaced apart.

[0082] Along the axial direction of the stator core 420, the projections of each of the first damping material filling holes 432 are located within the projection of the second damping material filling holes 441.

[0083] The second core lamination 440 is also provided with a fourth through hole 443. After the second core lamination 440 is stacked, the fourth through holes 443 together form a fourth damping material filling hole 444. The fourth damping material filling hole 444 penetrates the second core section 40 along the axial direction of the stator core 420.

[0084] The fourth damping material filling hole 444 is connected to the third damping material filling hole 433. The third through hole 434 and the first through hole 431 are arranged radially along the stator core 420, and the fourth through hole 443 and the second through hole 442 are also arranged radially along the stator core 420. In the radial direction of the stator core 420, the third through hole 434 is located on the side of the first through hole 431 away from the central axis of the stator core 420, and the fourth through hole 443 is located on the side of the second through hole 442 away from the central axis of the stator core 420. The fourth damping material filling hole 444 is connected to the third damping material filling hole 433, allowing the internally filled damping material to flow smoothly within each damping material filling hole. After the damping material 46 cools and solidifies, it forms an integral damping network structure, further enhancing the overall damping characteristics of the motor, thereby significantly reducing vibration and noise during motor operation.

[0085] Motor Example: The motor in this embodiment includes the stator assembly in the stator assembly embodiment described above.

[0086] Electrical Example: The electrical appliance in this embodiment includes the motor in the above-described motor embodiment.

[0087] 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 core, comprising a first core segment and a second core segment arranged along the axial direction of the stator core, wherein the first core segment is formed by stacking a plurality of first core laminations along the axial direction of the stator core, and the second core segment is formed by stacking a plurality of second core laminations along the axial direction of the stator core; Its features are: The first core lamination has a first through hole on its yoke portion. After the first core laminations are stacked, each of the first through holes together forms a first damping material filling hole. The first damping material filling hole passes through the first core segment along the axial direction of the stator core. The second core lamination has a second through hole on its yoke portion. After the second core laminations are stacked, each of the second through holes forms a second damping material filling hole. The second damping material filling hole passes through the second core section along the axial direction of the stator core and is connected to the first damping material filling hole. Along the axial direction of the stator core, the projection of the first through hole coincides with the projection of the first damping material filling hole, the projection of the second through hole coincides with the projection of the second damping material filling hole, and the projection of the first damping material filling hole does not coincide with the projection of the second damping material filling hole.

2. The stator core according to claim 1, characterized in that: The second through hole extends circumferentially along the second core lamination; and / or The first through hole is rectangular or circular.

3. The stator core according to claim 2, characterized in that: The second through hole is annular and is co-centered with the second iron core lamination. The second through hole is located in the radial middle of the yoke portion of the second iron core lamination.

4. The stator core according to claim 3, characterized in that: A third through hole is also provided on the yoke portion of the first core lamination. After the first core laminations are stacked, all the third through holes together form a third damping material filling hole. The third damping material filling hole penetrates the first core segment along the axial direction of the stator core; and / or The second core lamination is also provided with a fourth through hole. After the second core lamination is stacked, the fourth through holes together form a fourth damping material filling hole. The fourth damping material filling hole penetrates the second core section along the axial direction of the stator core.

5. The stator core according to claim 4, characterized in that: The fourth damping material filling hole is connected to the third damping material filling hole; The third through hole and the first through hole are arranged radially along the stator core, and the fourth through hole and the second through hole are arranged radially along the stator core. In the radial direction of the stator core, the third through hole is located on the side of the first through hole away from the central axis of the stator core, and the fourth through hole is located on the side of the second through hole away from the central axis of the stator core.

6. The stator core according to claim 4, characterized in that: The third damping material filling hole is connected to the second damping material filling hole.

7. The stator core according to claim 6, characterized in that: The first iron core lamination is also provided with a fifth through hole. After the first iron core lamination is stacked, each of the fifth through holes together forms a fifth damping material filling hole. The fifth damping material filling hole passes through the first iron core section along the axial direction of the stator iron core. The fifth damping material filling hole is connected to the second damping material filling hole. The first damping material filling hole and the third damping material filling hole are arranged along the circumference of the first iron core segment; In the circumferential direction of the first core segment, the fifth damping material filling hole is located between the first damping material filling hole and the third damping material filling hole; In the radial direction of the first core segment, the fifth damping material filling hole is closer to the central axis of the first core segment than the first damping material filling hole.

8. The stator core according to any one of claims 1 to 7, characterized in that: The number of first damping material filling holes is two or more, and each first damping material filling hole is arranged along the circumference of the first iron core segment. The number of second damping material filling holes is the same as the number of first damping material filling holes, and the second damping material filling holes are arranged in a one-to-one correspondence with the first damping material filling holes; or The number of first damping material filling holes is two or more, and each first damping material filling hole is arranged along the circumference of the first iron core segment. The number of second damping material filling holes is one, and along the axial direction of the stator iron core, the projection of each first damping material filling hole is located within the projection of the second damping material filling hole.

9. The stator core according to claim 8, characterized in that: The number of the first damping material filling holes is the same as the number of stator teeth of the stator core, and one first damping material filling hole and one stator tooth are arranged opposite each other along the radial direction of the stator core.

10. The stator core according to any one of claims 1 to 7, 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.

11. A stator assembly comprising damping material and a stator core as claimed in any one of claims 1 to 10, wherein at least a portion of the damping material is filled in the first damping material filling hole and the second damping material filling hole.

12. The stator assembly according to claim 11, characterized in that: The stator assembly also includes a housing, and 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, and part of the damping material is filled in the damping space.

13. The stator assembly according to claim 12, characterized in that: At least one of the inner peripheral wall of the housing and the outer peripheral wall of the stator core is provided with a damping groove, the damping groove is connected to the damping space, and part of the damping material is filled in the damping groove.

14. An electric motor, characterized in that, Includes the stator assembly as described in any one of claims 11 to 13.

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

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