Stator assembly and motor

Abstract

The invention discloses a stator assembly and a motor, and the stator assembly comprises a plurality of stator punching sheets, the plurality of stator punching sheets are stacked in a first direction, and the peripheral surface of at least one stator punching sheet is provided with a first medium accommodation groove. Therefore, when the damping material is arranged on the periphery of the stator assembly, the first medium accommodating groove on the peripheral surface of at least one stator punching sheet can accommodate the damping material, so that the local damping coefficient between the stator punching sheet and the motor shell can be increased, and noise deterioration caused by excessive vibration of the stator punching sheet part can be avoided; therefore, the NVH performance of the motor can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and in particular to a stator assembly and a motor. Background Art

[0002] The stator is an important part of the motor. It is installed in the motor housing with a certain gap between it and the motor housing. Due to the unbalanced rotation of the rotor, the radial force generated by the interaction between the stator magnetic field and the rotor magnetic field, and improper motor installation, the stator will vibrate during the operation of the motor.

[0003] In the prior art, the vibration of the stator will trigger corresponding excitation in the motor housing, which will cause unnecessary vibration of the motor and excessive noise, which will directly affect the NVH performance of the motor. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a stator assembly, which can improve the NVH performance of a motor.

[0005] The present invention further provides a motor.

[0006] The stator assembly according to the embodiment of the present invention comprises: a plurality of stator punching sheets, the plurality of stator punching sheets are stacked in a first direction, and a first medium accommodating groove is provided on an outer peripheral surface of at least one of the stator punching sheets.

[0007] Therefore, by arranging a first medium accommodating groove on the outer peripheral surface of at least one stator punching sheet, when the damping material is arranged on the periphery of the stator assembly, the first medium accommodating groove on the outer peripheral surface of at least one stator punching sheet can accommodate the damping material, thereby increasing the local damping coefficient between the stator punching sheet and the motor housing, avoiding excessive vibration of part of the stator punching sheet and causing deterioration of noise, thereby improving the NVH performance of the motor.

[0008] According to some embodiments of the present invention, the first medium accommodating groove is provided on the outer peripheral surface of each stator punching sheet.

[0009] According to some embodiments of the present invention, in a first direction, the first medium accommodating grooves on two adjacent stator punching sheets are at least partially staggered with each other in the circumferential direction of the stator assembly, and the first medium accommodating grooves on a plurality of stator punching sheets together form at least one groove segment.

[0010] According to some embodiments of the present invention, the groove segment includes a first groove segment and a second groove segment, each of the first groove segment and the second groove segment includes a plurality of first medium accommodating grooves, one end of the first groove segment is connected to one end of the second groove segment, the other end of the first groove segment and the other end of the second groove segment are spaced apart in the first direction, and an angle α is formed between the first groove segment and the second groove segment, and α satisfies the relationship: 0<α<180°.

[0011] According to some embodiments of the present invention, there are multiple groove segments, and the multiple groove segments are arranged in sequence in the first direction.

[0012] According to some embodiments of the present invention, each of the stator punching sheets is provided with a plurality of the first medium accommodating grooves spaced apart in the circumferential direction of the stator punching sheet, a plurality of the groove segments corresponding to each other in the first direction form a groove group, and the plurality of the groove groups are spaced apart in the circumferential direction of the stator assembly.

[0013] According to some embodiments of the present invention, the stator punching sheet includes a first stator punching sheet and a second stator punching sheet, the first medium accommodating groove is opened in the first stator punching sheet, there are multiple first stator punching sheets, and the multiple first stator punching sheets form at least two first stator punching sheet groups, the second stator punching sheet is arranged between two adjacent first stator punching sheet groups, each of the first stator punching sheet groups is provided with at least one groove segment arranged in a first direction, and the second stator punching sheet is provided with a second medium accommodating groove.

[0014] According to some embodiments of the present invention, the outer diameter of the second stator punching sheet is smaller than the outer diameter of the first stator punching sheet, and the second stator punching sheet is recessed relative to the first stator punching sheet toward the radial inner side of the first stator punching sheet to form the second medium accommodating groove.

[0015] According to some embodiments of the present invention, a plurality of the second stator punching sheets are arranged between two adjacent first stator punching sheet groups.

[0016] According to some embodiments of the present invention, an oil injection ring is provided at one end of the first stator punching group away from the second stator punching in the first direction, an oil outlet ring is provided at one end of the first stator punching group adjacent to the second stator punching in the first direction, an oil through hole is provided on the first stator punching, and the oil outlet ring and the oil injection ring are connected through the oil through hole.

[0017] According to some embodiments of the present invention, an oil inlet is provided on a side of the oil outlet ring in the first direction away from the second stator punching sheet, the oil inlet is connected to the oil hole, and an oil outlet is provided on the outer peripheral wall of the oil outlet ring, the oil outlet is connected to the oil inlet.

[0018] The motor according to the present invention comprises the stator assembly described above.

[0019] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which: Figure 1 is a schematic diagram of a stator assembly according to an embodiment of the present invention; Figure 2 is a partial schematic diagram of a stator assembly according to an embodiment of the present invention; Figure 3 is a schematic diagram of a stator assembly according to an embodiment of the present invention; Figure 4 is a partial schematic diagram of a stator assembly according to an embodiment of the present invention; Figure 5 is a schematic diagram of a stator assembly according to an embodiment of the present invention; Figure 6 is a partial schematic diagram of a stator assembly according to an embodiment of the present invention.

[0021] Reference numerals: 100, stator assembly; 200, motor housing; 2001, damping material injection hole; 2002, inner flow channel; 10. stator punching sheet; 11. first medium containing groove; 12. groove group; 13. groove segment; 131. first groove segment; 132. second groove segment; 14. first stator punching sheet group; 141. first stator punching sheet; 15. second stator punching sheet; 151. second medium containing groove; 20. Oil injection ring; 30. Oil outlet ring; 31. Oil inlet; 32. Oil outlet; 40. Oil hole. DETAILED DESCRIPTION

[0022] Embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. Embodiments of the present invention are described in detail below.

[0023] Reference below Figure 1-Figure 6 A stator assembly 100 according to an embodiment of the present invention is described. The stator assembly 100 according to the embodiment of the present invention may be applied to a motor.

[0024] Combination Figure 1-Figure 3As shown, the stator assembly 100 according to the embodiment of the present invention may mainly include: a stator punching sheet 10, wherein there are a plurality of stator punching sheets 10, the plurality of stator punching sheets 10 are stacked in a first direction, and a first medium accommodating groove 11 is provided on the outer circumference of at least one stator punching sheet 10. Specifically, the motor housing 200 is provided on the outer circumference of the stator assembly 100, and corresponds to the first medium accommodating groove 11 on the outer circumference of the stator assembly 100, so that when the damping material is filled between the stator assembly 100 and the motor housing 200, the first medium accommodating groove 11 can accommodate part of the damping material.

[0025] The damping material between the portion of the stator assembly 100 corresponding to the first medium accommodating groove 11 and the motor housing 200 is greater than the damping material between the other portions of the stator assembly 100 except the first medium accommodating groove 11 and the motor housing 200. This can increase the damping coefficient between the portion of the stator assembly 100 corresponding to the first medium accommodating groove 11 and the motor housing 200, thereby weakening the excitation of the motor housing 200 by the vibration generated by the stator assembly 100, reducing the response frequency of the motor housing 200 and other stator punching sheets 10 to vibration, weakening the transmission path of vibration and noise, and at the same time reducing the response amplitude of the motor housing 200 and other stator punching sheets 10 to vibration. Such a configuration is beneficial to improving the overall NVH performance of the motor.

[0026] In an embodiment of the present invention, multiple stators are stacked in a first direction, and a first medium accommodating groove 11 is provided on the outer circumference of at least one stator punching sheet 10, so that at least one first medium accommodating groove 11 can be provided on the outer circumference of the stator assembly 100 in the first direction.

[0027] Such arrangement can, on the one hand, prevent the first medium accommodating groove 11 from affecting the structural strength of the teeth on the stator punching sheet 10, thereby ensuring the structural reliability of the teeth and boots on the stator punching sheet 10; on the other hand, it can increase the damping coefficient between the stator assembly 100 and the motor housing 200 in the first direction, thereby preventing partial vibration of the stator assembly 100 in the first direction from causing excitation of the motor housing 200.

[0028] Combination Figure 1 As shown, a first medium accommodating groove 11 is provided on the outer circumferential surface of each stator punching sheet 10. Specifically, in the stator assembly 100, a plurality of stator punching sheets 10 are stacked along the first direction, and a first medium accommodating groove 11 is provided on the outer circumferential surface of each stator punching sheet 10, so that a first medium accommodating groove 11 can be provided between each stator punching sheet 10 and the motor housing 200 to accommodate more damping materials, thereby increasing the damping coefficient between each stator punching sheet 10 and the motor housing 200, and buffering the vibration transmission between each stator punching sheet 10 and the motor housing 200.

[0029] Furthermore, in the first direction, the first medium accommodating grooves 11 on two adjacent stator punching sheets 10 are at least partially staggered in the circumferential direction of the stator assembly 100, so that the damping material between the stator punching sheet 10 and the motor housing 200 can be distributed not only in the first direction, but also in the circumferential direction of the stator punching sheet 10. In this way, the damping material can be distributed in the circumferential direction between the stator punching sheet 10 and the motor housing 200, which can increase the damping coefficient between the stator assembly 100 and the motor housing 200 in the circumferential direction, and avoid the excitation of the motor housing 200 caused by the circumferential vibration of the stator assembly 100.

[0030] Furthermore, the first medium accommodating grooves 11 on the plurality of stator punching sheets 10 together form at least one groove segment 13. Such an arrangement can not only make the damping material distributed circumferentially between the stator assembly 100 and the motor housing 200, but also make the damping material distributed up and down between the stator assembly 100 and the motor housing 200, so that the distribution of the damping material between the stator assembly 100 and the motor housing 200 can be more uniform and sufficient, and the excitation of the motor housing 200 caused by the uneven arrangement of the damping material can be effectively reduced, thereby effectively reducing vibration and noise, and effectively improving the NVH performance of the motor.

[0031] Combination Figure 2 and Figure 3 As shown, the groove segment 13 includes a first groove segment 131 and a second groove segment 132, each of which includes a plurality of first medium accommodating grooves 11, one end of the first groove segment 131 is connected to one end of the second groove segment 132, the other end of the first groove segment 131 and the other end of the second groove segment 132 are spaced apart in the first direction, and an angle is formed between the first groove segment 131 and the second groove segment 132.

[0032] Specifically, in the same groove segment 13, the first medium accommodating groove 11 in the first groove segment 131 and the first medium accommodating groove 11 in the second groove segment 132 are arranged correspondingly in the first direction, and the first medium accommodating groove 11 in the first groove segment 131 and the first medium accommodating groove 11 in the second groove segment 132 are both arranged along the circumferential direction of the stator assembly 100, thereby making the damping medium more evenly distributed between the stator assembly 100 and the motor housing 200.

[0033] Such an arrangement can not only increase the damping coefficient between the stator assembly 100 and the motor housing 200 in the first direction, but also increase the damping coefficient between the stator assembly 100 and the motor housing 200 in the circumferential direction. This can effectively prevent the motor housing 200 from generating corresponding excitation due to the vibration of the stator assembly 100, weaken the transmission path of vibration and noise, and at the same time reduce the response amplitude of the motor housing 200 and other stator punching sheets 10 to vibration. Such an arrangement is beneficial to improving the overall NVH performance of the motor.

[0034] According to some embodiments of the present invention, an angle α is formed between the first groove segment 131 and the second groove segment 132, and α satisfies the relationship: 0<α. Such a configuration can ensure that the first medium accommodating grooves 11 in the first groove segment 131 and the second groove segment 132 are at least partially arranged in sequence along the first direction, thereby improving the uniformity of distribution of the multiple first medium accommodating grooves 11 along the first direction between the stator assembly 100 and the motor housing 200, and further improving the uniformity of distribution of the damping medium along the first direction between the stator assembly 100 and the motor housing 200, which is beneficial to improving the NVH performance of the motor.

[0035] According to some other embodiments of the present invention, an angle α is formed between the first groove segment 131 and the second groove segment 132, and α satisfies the relationship: α<180°. Such a configuration can ensure that the first medium accommodating grooves 11 in the first groove segment 131 and the second groove segment 132 are at least partially arranged in sequence along the circumferential direction, thereby improving the uniformity of the circumferential distribution of the multiple first medium accommodating grooves 11 between the stator assembly 100 and the motor housing 200, and further improving the uniformity of the circumferential distribution of the damping medium between the stator assembly 100 and the motor housing 200, which is beneficial to improving the NVH performance of the motor.

[0036] According to some further embodiments of the present invention, an angle α is formed between the first groove section 131 and the second groove section 132, and α satisfies the relationship: 0<α<180°. Such an arrangement can ensure that the first medium accommodating grooves 11 in the first groove section 131 and the second groove section 132 are at least partially arranged in sequence along the first direction and the circumferential direction, so that the uniformity of the distribution of the plurality of first medium accommodating grooves 11 along the first direction and the circumferential direction between the stator assembly 100 and the motor housing 200 can be improved, and then the uniformity of the distribution of the damping medium along the first direction and the circumferential direction between the stator assembly 100 and the motor housing 200 can be improved, which is beneficial to improving the NVH performance of the motor.

[0037] Combination Figure 1 and Figure 2As shown, there are multiple groove segments 13, and the multiple groove segments 13 are arranged in sequence in the first direction. Specifically, the first groove segment 131 and the second groove segment 132 in one groove segment 13 have limited effect on enhancing the damping coefficient between the stator assembly 100 and the motor housing 200 in the first direction and the circumferential direction. However, in practical applications, the size of the motor is diverse. If only one groove segment 13 is provided on the stator assembly 100, it is difficult to meet the vibration reduction requirements of motors of different sizes.

[0038] Furthermore, in an embodiment of the present invention, a plurality of groove segments 13 consisting of a first groove segment 131 and a second groove segment 132 are provided on the stator assembly 100, and the plurality of groove segments 13 are arranged sequentially in the first direction, so that a plurality of first medium accommodating grooves 11 are provided in the first direction of the stator assembly 100, so that the stator assembly 100 in the embodiment of the present invention is suitable for use in motors of different sizes.

[0039] Combination Figure 3 As shown, each stator punching sheet 10 is provided with a plurality of first medium accommodating grooves 11 which are spaced apart along the circumference of the stator punching sheet 10, so that a plurality of groove segments 13 can be formed on the periphery of the stator assembly 100, and a plurality of groove segments 13 corresponding to each other in the first direction form a groove group 12, and there are a plurality of groove groups 12, and a plurality of groove groups 12 are spaced apart along the circumference of the stator assembly 100, so that a plurality of first medium accommodating grooves 11 can be evenly arranged along the circumference of the stator assembly 100, and further, the damping medium can be evenly distributed along the circumference between the stator assembly 100 and the motor housing 200, which can effectively reduce the excitation of the motor housing 200 caused by the circumferential vibration of the stator assembly 100.

[0040] In an embodiment of the present invention, the first stator punching sheet 141 includes but is not limited to four first medium accommodating grooves 11, and the multiple first medium accommodating grooves 11 on each stator punching sheet 10 include but are not limited to at least one of a circular medium accommodating groove, an elliptical medium accommodating groove, a rectangular medium accommodating groove, a square medium accommodating groove, a D-shaped medium accommodating groove and a flat medium accommodating groove.

[0041] Combination Figure 1 and Figure 2 As shown, the stator punching sheet 10 includes a first stator punching sheet 141 and a second stator punching sheet 15, a first medium accommodating groove 11 is opened in the first stator punching sheet 141, there are multiple first stator punching sheets 141, multiple first stator punching sheets 14 form at least two first stator punching sheet groups 14, the second stator punching sheet 15 is arranged between two adjacent first stator punching sheet groups 14, each first stator punching sheet group 14 is provided with at least one groove section 13 arranged in the first direction, and the second stator punching sheet 15 is provided with a second medium accommodating groove 151.

[0042] In this way, the first stator punching sheet 141 can be divided into at least two parts to arrange the stator punching sheet 10 on the stator assembly 100 in sections, so that when the damping material is injected between the stator assembly 100 and the motor housing 200, the flow range of the damping material between the stator assembly 100 and the motor housing 200 can be reduced, and the difficulty of filling the damping material between the stator assembly 100 and the motor housing 200 can be reduced, which is conducive to the uniform distribution of the damping material between the stator assembly 100 and the motor housing 200.

[0043] Furthermore, a second stator punching sheet 15 is disposed between the two first stator punching sheet groups 14 , and the second stator punching sheet 15 can separate the two first stator punching sheet groups 14 to achieve segmented arrangement of the stator punching sheets 10 on the stator assembly 100 .

[0044] Furthermore, a second medium accommodating groove 151 is provided on the second stator punching sheet 15, and the second medium accommodating groove 151 is used to accommodate damping material to increase the damping coefficient between the second stator punching sheet 15 and the motor housing 200. This can weaken the excitation of the motor housing 200 by the vibration generated by the second stator punching sheet 15, weaken the transmission path of vibration and noise, and at the same time reduce the response amplitude of the motor housing 200 and other stator punching sheets 10 to vibration. Such a configuration is beneficial to improving the overall NVH performance of the motor.

[0045] In the embodiment of the present invention, a damping material injection hole 2001 is provided in the middle position of the motor housing 200 in the first direction, and the damping material injection hole 2001 is correspondingly connected to the second medium accommodating groove 151 on the second stator punching sheet 15 .

[0046] In this way, the damping material can be injected into between the stator assembly 100 and the motor housing 200 through the damping material injection hole 2001 , and the thermally conductive insulating glue can also be injected into between the stator assembly 100 and the motor housing 200 through the damping material injection hole 2001 .

[0047] The damping material injection hole 2001 is arranged at the middle position of the motor housing 200 in the first direction, which can make the flow distribution of the damping material between the stator assembly 100 and the motor housing 200 more uniform, thereby facilitating increasing the damping coefficient between the stator assembly 100 and the motor housing 200, thereby reducing the vibration transmission amplitude between the stator assembly 100 and the motor housing 200.

[0048] The thermally conductive insulating glue can bond the damping material in the first medium accommodating groove 11 and the second medium accommodating groove 151. On the one hand, it can ensure the stability of the setting of the damping material between the stator assembly 100 and the motor housing 200. On the other hand, it can ensure the reliability of the damping material in vibration buffering in the motor and the reliability of improving the NVH performance of the motor.

[0049] In the embodiment of the present invention, the damping material includes but is not limited to at least one of a rubber damping material and a silicone damping material. The damping material can be bonded to the first medium accommodating groove 11 and the second medium accommodating groove 151 by heat-conductive insulating glue.

[0050] Combination Figure 1 and Figure 2 As shown, the outer diameter of the second stator sheet 15 is smaller than the outer diameter of the first stator sheet 141, and the second stator sheet 15 is recessed relative to the first stator sheet 141 toward the radial inner side of the first stator sheet 141. In this way, a second medium accommodating groove 151 can be formed between the second stator sheet 15, the upper and lower first stator sheet groups 14 and the motor housing 200, and the damping material injection hole 2001 on the motor housing 200 is correspondingly connected to the second medium accommodating groove 151. In this way, when the damping material is injected into the space between the motor housing 200 and the stator assembly 100 through the damping material injection hole 2001, the damping material can first enter the second medium accommodating groove 151, and after the damping material fills the second medium accommodating groove 151, the damping material begins to flow into the gap between the first stator sheet group 14 and the motor housing 200. In this process, the damping material can fill the first medium accommodating groove 11.

[0051] Such a configuration can increase the damping coefficient between the stator assembly 100 and the motor housing 200, weaken the vibration transmission path in the motor, reduce the excitation of the motor housing 200 caused by partial vibration of the stator assembly 100, and thus improve the NVH performance of the motor.

[0052] According to an embodiment of the present invention, a plurality of second stator sheets 15 are arranged between two adjacent first stator sheet groups 14, so that a suitable rotating magnetic field can be formed in the stator assembly 100. In this way, after the stator sheets 10 in the stator assembly 100 are arranged in sections, the normal operation of the motor can be guaranteed.

[0053] Furthermore, a plurality of second stator punching sheets 15 are spaced apart from each other in the first direction, and a gap is formed between two adjacent second stator punching sheets 15. When the damping material is injected between the stator assembly 100 and the motor housing 200, the damping material can fill the gap between the two adjacent second stator punching sheets 15 to reduce the amplitude of vibration transmission between the stator assembly 100 and the motor housing 200.

[0054] Combination Figure 1 As shown, an oil injection ring 20 is provided at one end of the first stator punching group 14 away from the second stator punching 15 in the first direction, an oil outlet ring 30 is provided at one end of the first stator punching group 14 adjacent to the second stator punching 15 in the first direction, and an oil through hole 40 is provided on the first stator punching 141, and the oil outlet ring 30 and the oil injection ring 20 are connected through the oil through hole 40.

[0055] Specifically, the cooling oil can enter the first stator punching group 14 through the oil injection ring 20, and flow into the first stator punching 141 through the oil holes 40 on the first stator punching 141, so that the cooling oil can be in contact with the first stator punching 141 for heat exchange, and can take away the heat generated by the first stator punching 141. The oil holes 40 on the multiple first stator punchings 141 stacked up and down correspond to each other, so that the cooling oil can flow through each first stator punching 141 stacked up and down in sequence, so that the cooling oil can dissipate heat from the multiple first stator punchings 141.

[0056] Furthermore, the cooling oil flows along the multiple oil holes 40 on the first stator punching group 14 to the oil outlet ring 30, and finally flows out from the oil outlet ring 30 and enters between the stator assembly 100 and the motor housing 200, so that the cooling oil can dissipate heat from the stator assembly 100, thereby ensuring the working reliability of the stator assembly 100.

[0057] In an embodiment of the present invention, a plurality of circumferentially spaced oil holes 40 are provided on the radial side of the first stator punching sheet 141. In the first direction, the plurality of oil holes 40 on adjacent first stator punching sheets 141 are connected one by one to ensure smooth flow of cooling oil.

[0058] According to an embodiment of the present invention, there are at least two first stator punching sheet groups 14 in a stator assembly 100, so that each first stator punching sheet group 14 in a stator assembly 100 is provided with an oil injection ring 20 and an oil outlet ring 30, so that cooling oil can flow into each first stator punching sheet group 14 to dissipate heat for at least two first stator punching sheet groups 14 at the same time, thereby improving the heat dissipation efficiency of the stator assembly 100.

[0059] Combination Figure 5 As shown, an oil inlet 31 is provided on the side of the oil outlet ring 30 that is away from the second stator punching sheet 15 in the first direction. After the cooling oil flows out of the reducer, it can enter the oil outlet ring 30 through the oil inlet 31. The oil inlet 31 is connected to the oil hole 40, so that the cooling oil in the first stator punching sheet 141 can flow into the oil outlet ring 30. An oil outlet 32 ​​is provided on the outer peripheral surface of the oil outlet ring 30, and the oil outlet 32 ​​is connected to the oil inlet 31, so that the cooling oil flowing into the oil outlet ring 30 can flow out through the oil outlet 32.

[0060] Furthermore, the oil outlet 32 ​​and the oil inlet 31 on the oil outlet ring 30 are spaced apart from each other, and the oil outlet 32 ​​is correspondingly connected to the inner flow channel 2002 arranged on the inner wall of the motor housing 200, so that the cooling oil can be guided to the inner flow channel 2002 of the motor housing 200 after passing through the oil outlet 32, and the cooling oil can be prevented from spreading to the first stator punching sheet 141, so that the cooling oil can transfer the heat on the first stator punching sheet 141 to the inner flow channel 2002 of the motor housing 200, and finally the cooling oil flows back to the reducer to realize the circulation of the cooling oil in the motor, so that the heat dissipation of the first stator punching sheet 141 can be achieved.

[0061] It should be noted that the oil outlet ring 30 is provided with multiple oil inlets 31 and multiple oil outlets 32, and the number of the multiple oil outlets 32 is consistent with the number of the multiple oil inlets 31, and the multiple oil outlets 32 are connected to the multiple oil inlets 31 in a one-to-one correspondence, so as to ensure the efficiency of the cooling oil flowing out of the oil outlet ring 30, and further ensure the heat dissipation efficiency of the stator assembly 100.

[0062] In an embodiment of the present invention, the inner wall of the motor housing 200 is interference fit with the outer peripheral surface of the stator assembly 100, and the size of the interference fit between the two is between 0.1 mm and 0.2 mm. The inner wall of the motor housing 200 is provided with a plurality of inner flow channels 2002, at least part of the plurality of inner flow channels 2002 is extended along the radial direction of the motor housing 200, and at least part of the plurality of inner flow channels 2002 is extended along the axial direction of the motor housing 200. The damping material injection hole 2001 is located in the middle position of the motor housing 200 along the first direction, and the thermally conductive insulating glue can be injected into the inner flow channel 2002 of the motor housing 200 through the damping material injection hole 2001.

[0063] According to an embodiment of the present invention, the motor includes a stator assembly 100 in an embodiment of the present invention. The stator assembly 100 of the present invention is provided with first medium accommodating grooves 11 on the outer peripheral surfaces of a plurality of stator punchings 10, and the first medium accommodating grooves 11 on the plurality of stator punchings 10 are arranged in sequence along the first direction and the circumferential direction of the stator assembly 100 at the same time, so that when the plurality of first medium accommodating grooves 11 accommodate damping materials, the damping materials can be distributed more evenly and fully between the stator assembly 100 and the motor housing 200, so that the excessive vibration of part of the stator punchings 10 can be avoided to cause the noise to deteriorate, thereby improving the NVH performance of the motor.

[0064] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example.

[0065] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A stator assembly, characterized in that: include: A stator punching sheet (10), wherein the stator punching sheet (10) is multiple, the multiple stator punching sheets (10) are stacked in a first direction, and a first medium accommodating groove (11) is provided on the outer peripheral surface of at least one of the stator punching sheets (10).

2. The stator assembly according to claim 1, characterized in that The first medium accommodating groove (11) is provided on the outer peripheral surface of each stator punching sheet (10).

3. The stator assembly according to claim 2, characterized in that: In a first direction, the first medium accommodating grooves (11) on two adjacent stator punching sheets (10) are at least partially staggered with each other in the circumferential direction of the stator assembly (100), and the first medium accommodating grooves (11) on a plurality of stator punching sheets (10) together form at least one groove segment (13).

4. The stator assembly according to claim 3, characterized in that: The groove section (13) comprises a first groove section (131) and a second groove section (132), each of the first groove section (131) and the second groove section (132) comprising a plurality of the first medium accommodating grooves (11), one end of the first groove section (131) is connected to one end of the second groove section (132), the other end of the first groove section (131) and the other end of the second groove section (132) are arranged at intervals in a first direction, and an angle α is formed between the first groove section (131) and the second groove section (132), and α satisfies the relationship: 0<α<180°.

5. The stator assembly according to claim 3, characterized in that: There are a plurality of groove segments (13), and the plurality of groove segments (13) are arranged in sequence in a first direction.

6. The stator assembly according to claim 3, characterized in that: Each of the stator punching sheets (10) is provided with a plurality of the first medium accommodating grooves (11) arranged at intervals in the circumferential direction of the stator punching sheet (10); a plurality of the groove segments (13) corresponding to each other in the first direction form a groove group (12); there are a plurality of the groove groups (12); and the plurality of the groove groups (12) are arranged at intervals in the circumferential direction of the stator assembly (100).

7. The stator assembly according to claim 3, characterized in that: The stator punching sheet (10) comprises a first stator punching sheet (141) and a second stator punching sheet (15); the first medium accommodating groove (11) is opened in the first stator punching sheet (141); there are a plurality of first stator punching sheets (141), and the plurality of first stator punching sheets (141) form at least two first stator punching sheet groups (14); the second stator punching sheet (15) is arranged between two adjacent first stator punching sheet groups (14); each of the first stator punching sheet groups (14) is provided with at least one groove section (13) arranged in a first direction; and the second stator punching sheet (15) is provided with a second medium accommodating groove (151).

8. The stator assembly according to claim 7, characterized in that The outer diameter of the second stator punching sheet (15) is smaller than the outer diameter of the first stator punching sheet (141), and the second stator punching sheet (15) is recessed relative to the first stator punching sheet (141) toward the radial inner side of the first stator punching sheet (141) to form the second medium accommodating groove (151).

9. The stator assembly according to claim 8, characterized in that A plurality of the second stator punching sheets (15) are arranged between two adjacent first stator punching sheet groups (14).

10. The stator assembly according to claim 7, characterized in that An oil injection ring (20) is provided at one end of the first stator punching group (14) which is away from the second stator punching group (15) in the first direction, and an oil outlet ring (30) is provided at one end of the first stator punching group (14) which is adjacent to the second stator punching group (15) in the first direction. An oil through hole (40) is provided on the first stator punching group (141), and the oil outlet ring (30) and the oil injection ring (20) are connected via the oil through hole (40).

11. The stator assembly according to claim 10, characterized in that An oil inlet (31) is provided on a side of the oil outlet ring (30) facing away from the second stator punching sheet (15) in the first direction, the oil inlet (31) being in communication with the oil through hole (40), and an oil outlet (32) is provided on the outer peripheral wall of the oil outlet ring (30), the oil outlet (32) being in communication with the oil inlet (31).

12. A motor, characterized in that: The stator assembly (100) comprises any one of claims 1 to 9.

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