Electric motors, electric drive systems, and vehicles

Abstract

The present disclosure relates to a motor, an electric drive system and a vehicle, wherein the motor includes a motor shaft, a support member and a housing, the housing includes a motor end cover, the support member is supported between the outer peripheral side of the motor shaft and the motor end cover, the support member is provided with a receiving chamber suitable for receiving damping fluid inside, and the support member is configured to be elastically deformed under the impact of the motor shaft. The support member of the motor disclosed in the present disclosure can perform multiple buffering on the vibration of the motor shaft through elastic deformation and the damping fluid in the receiving chamber, thereby being able to effectively suppress the vibration of the motor shaft. In addition, the support member is configured to be elastically deformed under the impact of the motor shaft, and can also reduce the support stiffness of the motor end cover on the motor shaft, thereby being conducive to better suppressing the vibration of the motor shaft, allowing the motor shaft to be high-speed, so that the motor shaft has the advantages brought by high speed.

Description

Technical Field

[0001] The present disclosure relates to the technical field of motors, and in particular, to a motor, an electric drive system and a vehicle. Background Art

[0002] At present, in some fields, there is an increasing demand for higher speeds of motors (such as automotive motors). Higher speeds can bring advantages such as higher power density, smaller electric drive volume, lower weight, and lower material costs. The vibration of the motor shaft is an important factor limiting the motor speed. Therefore, how to suppress the vibration of the motor shaft is an important research direction in this field. Summary of the invention

[0003] The purpose of the present disclosure is to provide a motor, an electric drive system and a vehicle to at least partially solve the technical problems existing in the related art.

[0004] In order to achieve the above object, according to a first aspect of the present disclosure, there is provided a motor, comprising a motor shaft, a support member and a housing, wherein the housing comprises a motor end cover, and the support member is supported between the outer peripheral side of the motor shaft and the motor end cover;

[0005] The support member is provided with a receiving cavity suitable for receiving damping fluid;

[0006] The support member is configured to be able to undergo elastic deformation under the abutment of the motor shaft.

[0007] Optionally, the support member includes a first support sub-member and a second support sub-member, the accommodating cavity is arranged between the first support sub-member and the second support sub-member, and at least one of the first support sub-member and the second support sub-member is arranged to be able to undergo elastic deformation under the abutment of the motor shaft.

[0008] Optionally, the first supporting sub-component is arranged on a side of the accommodating cavity close to the motor shaft, and the second supporting sub-component is arranged on a side of the accommodating cavity away from the motor shaft, and the first supporting sub-component is configured to be able to undergo elastic deformation under the abutment of the motor shaft.

[0009] Optionally, both the first supporting sub-component and the second supporting sub-component are annular structures, and at least a portion of the first supporting sub-component is located radially inside the second supporting sub-component.

[0010] Optionally, the outer wall of the first supporting sub-component includes a first outer wall and a second outer wall, the first outer wall and the second outer wall are arranged along the axial direction of the first supporting sub-component, and the second outer wall is located on the inner side of the first outer wall in the radial direction;

[0011] The first outer wall is sealingly connected to the second supporting sub-component, the second outer wall and the second supporting sub-component are radially spaced apart, the accommodating cavity is located between the second outer wall and the second supporting sub-component, and the second outer wall can move toward the second supporting sub-component when the supporting component undergoes elastic deformation.

[0012] Optionally, the outer wall of the first supporting sub-component further includes a first connecting wall, the first connecting wall extends radially, one end of the first connecting wall is connected to the first outer wall, and the other end of the first connecting wall is connected to the second outer wall.

[0013] Optionally, the support member further comprises a first sealing ring, and the first sealing ring is arranged between the second outer wall and the inner wall of the second supporting sub-member;

[0014] The first sealing ring, the first supporting sub-component and the second supporting sub-component enclose the accommodating cavity.

[0015] Optionally, a first annular groove is provided on at least one of the second outer wall and the inner wall of the second supporting sub-component, and a portion of the first sealing ring is embedded in the first annular groove.

[0016] Optionally, the first supporting sub-component further includes a first annular boss, and the first annular boss is arranged at an end of the second outer wall away from the first outer wall;

[0017] The support member further includes a second sealing ring, which is arranged between the outer peripheral wall of the first annular boss and the motor end cover.

[0018] Optionally, a second annular groove is provided on the outer peripheral wall of the first annular boss, and a portion of the second sealing ring is embedded in the second annular groove.

[0019] Optionally, the radial spacing dimension between the second outer wall and the inner wall of the second supporting sub-component is a first dimension, the diameter of the annular surface where the first outer wall is located is a second dimension, and the first dimension is 1‰~5‰ of the second dimension.

[0020] Optionally, the motor also includes a first bearing sleeved on the motor shaft, the inner wall of the first supporting sub-component includes a first inner wall, a second inner wall and a second connecting wall, the first inner wall and the second inner wall are arranged along the axial direction of the first supporting sub-component, the second inner wall is radially located on the outside of the first inner wall, the second inner wall is connected to the first inner wall through the second connecting wall, the second inner wall abuts against the outer peripheral wall of the first bearing, and the second connecting wall abuts against the end wall of the first bearing.

[0021] Optionally, the first outer wall and the inner wall of the second supporting sub-component are butted against each other in an assembly manner with a pre-tightening force.

[0022] Optionally, the first supporting sub-component further includes a second annular boss, and the second annular boss is arranged at an end of the first outer wall away from the second outer wall;

[0023] The second annular boss is provided with a first mounting hole extending in the axial direction, and the end of the second supporting sub-component is provided with a second mounting hole extending in the axial direction;

[0024] The support member further includes a fastener, and the fastener is used to connect the first mounting hole and the second mounting hole.

[0025] Optionally, the first supporting sub-component is provided with a stiffness reducing portion.

[0026] Optionally, both the first supporting sub-component and the second supporting sub-component are annular structures, and the first supporting sub-component includes a first annular portion and a second annular portion connected in its axial direction;

[0027] The first annular portion is located on the inner side of the second supporting sub-component, and the accommodating cavity is located between the first annular portion and the second supporting sub-component;

[0028] The second annular portion is provided with the rigidity weakening portion.

[0029] Optionally, the stiffness reduction portion includes a hollow portion located in the second annular portion.

[0030] Optionally, there are multiple hollow portions, and the multiple hollow portions are arranged at equal intervals along the circumference of the second annular portion, and two adjacent hollow portions are separated by connecting ribs.

[0031] Optionally, the first supporting sub-component further includes a third annular portion, wherein the third annular portion is connected to an end of the second annular portion away from the first annular portion;

[0032] The third annular portion is connected to the housing.

[0033] Optionally, at least one connecting lug is provided on the outer peripheral wall of the third annular portion, and the connecting lug is suitable for being connected to the end surface of the shell through a fastener; and / or,

[0034] The outer circumferential wall of the third annular portion abuts against the inner circumferential wall of the shell in an assembly manner with a pre-tightening force.

[0035] Optionally, the supporting sub-component further comprises a third sealing ring and a fourth sealing ring, wherein the third sealing ring and the fourth sealing ring are arranged between the outer peripheral wall of the first annular portion and the inner wall of the second supporting sub-component at intervals along the axial direction of the first annular portion;

[0036] The first annular portion, the second supporting sub-component, the third sealing ring and the fourth sealing ring jointly enclose the accommodating cavity.

[0037] Optionally, a third annular groove is provided on at least one of the outer peripheral wall of the second annular portion and the inner wall of the second supporting sub-component, and a portion of the third sealing ring is embedded in the third annular groove; and / or,

[0038] A fourth annular groove is provided on at least one of the outer peripheral wall of the second annular portion and the inner wall of the second supporting sub-component, and a portion of the fourth sealing ring is embedded in the fourth annular groove.

[0039] Optionally, the radial spacing dimension between the outer wall of the first annular portion and the inner wall of the second supporting sub-component is a third dimension, the diameter of the annular surface where the inner wall of the second supporting sub-component is located is a fourth dimension, and the third dimension is 1‰~5‰ of the fourth dimension.

[0040] Optionally, the inner wall of the first annular portion includes a third inner wall, a fourth inner wall and a third connecting wall, the third inner wall and the fourth inner wall are arranged along the axial direction of the first annular portion, the third inner wall is located radially on the outside of the fourth inner wall, the fourth inner wall is connected to the third inner wall through the third connecting wall, the third inner wall abuts against the outer peripheral wall of the first bearing installed on the motor shaft, and the third connecting wall abuts against the end wall of the first bearing.

[0041] Optionally, the support member is further provided with a liquid inlet and a liquid outlet communicated with the accommodating cavity;

[0042] The motor end cover is provided with an oil inlet channel and an oil outlet channel. The oil inlet channel is communicated with the accommodating cavity through a liquid inlet on the support member, and the oil outlet channel is communicated with the accommodating cavity through a liquid outlet on the support member.

[0043] Optionally, the oil inlet channel at least comprises an oil inlet channel section extending in the radial direction of the motor, one end of the oil inlet channel section being connected to the liquid inlet; and / or,

[0044] The oil outlet channel at least comprises an oil outlet channel section arranged tilted relative to the radial direction of the motor, one end of the oil outlet channel section is connected to the liquid outlet, and the other end of the oil outlet channel section extends to the inner end surface of the motor end cover.

[0045] Optionally, the support member is further provided with a liquid inlet and a liquid outlet communicating with the accommodating cavity, and the liquid inlet and the liquid outlet are both provided on the first supporting sub-member; or,

[0046] The liquid inlet is arranged on the second supporting sub-component, and the liquid outlet is arranged on the first supporting sub-component.

[0047] Optionally, a mounting groove is provided on the inner side of the motor end cover, and along the radial direction of the motor shaft, a side of the support member away from the motor shaft abuts against a groove wall of the mounting groove.

[0048] According to a second aspect of the present disclosure, an electric drive system is provided, comprising the above-mentioned motor.

[0049] Optionally, the electric drive system further includes a reducer, and an input shaft of the reducer is connected to the motor shaft.

[0050] According to a third aspect of the present disclosure, a vehicle is provided, comprising the above-mentioned electric drive system or the above-mentioned motor.

[0051] In the present disclosure, the support member can be supported between the outer peripheral side of the motor shaft and the motor end cover to realize the support of the motor end cover to the motor shaft. When the motor shaft tends to vibrate, the support member can be elastically deformed under the impact of the motor shaft, thereby buffering the vibration of the motor shaft. Secondly, since the support member is provided with a accommodating chamber inside, oil film damping can be formed after damping liquid is provided in the accommodating chamber. When the support member is elastically deformed under the impact of the motor shaft, the volume of the accommodating chamber can be compressed. In this way, the damping liquid can be used to play a buffering role, thereby buffering the vibration of the motor shaft. In summary, the support member of the present disclosure can perform multiple buffering on the vibration of the motor shaft through elastic deformation and the damping liquid in the accommodating chamber, thereby effectively suppressing the vibration of the motor shaft.

[0052] Furthermore, the support member is configured to be able to undergo elastic deformation under the impact of the motor shaft, and can also reduce the support stiffness of the motor end cover on the motor shaft, thereby facilitating better suppression of the vibration of the motor shaft. The above scheme allows the motor shaft to be operated at a high speed, thereby facilitating the advantages of higher power density, smaller electric drive volume, lower weight, and lower material cost brought about by high speed.

[0053] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:

[0055] Figure 1 is a partial cross-sectional schematic diagram of an electric drive system provided by an embodiment of the present disclosure, wherein only some components of a motor and a reducer are shown;

[0056] Figure 2 yes Figure 1 A local enlarged schematic diagram of the middle A;

[0057] Figure 3 yes Figure 1 A partial enlarged schematic diagram of point B in the middle;

[0058] Figure 4 is a schematic diagram of the three-dimensional structure of a support member provided in the first embodiment of the present disclosure;

[0059] Figure 5 is a partial cross-sectional schematic diagram of a support member provided in a first embodiment of the present disclosure;

[0060] Figure 6 is a schematic diagram of the three-dimensional structure of a support member provided in a second embodiment of the present disclosure;

[0061] Figure 7 is a partial cross-sectional schematic diagram of a support member provided in a second embodiment of the present disclosure;

[0062] Figure 8 is a schematic diagram of a three-dimensional structure of a support member provided in a third embodiment of the present disclosure;

[0063] Fig. 9 yes Figure 8 A partial cross-sectional schematic diagram of the support member shown;

[0064] Fig.10 is a schematic diagram of a three-dimensional structure of a support member and a housing in an assembled state provided by a fourth embodiment of the present disclosure;

[0065] Fig.11 is a schematic diagram of the three-dimensional structure of a support member provided in the fourth embodiment of the present disclosure;

[0066] Fig.12 yes Fig.10 A schematic cross-sectional view of the support member shown;

[0067] Fig.13 yes Fig.10 A partial cross-sectional schematic diagram of the support member shown;

[0068] Fig.14 yes Fig.13 A partial enlarged schematic diagram of point C in the middle.

[0069] Description of Reference Numerals

[0070] 100-support member; 10-accommodating cavity; 20-elastic deformation portion; 30-first supporting member; 31-first outer wall; 32-second outer wall; 321-first annular groove; 33-first connecting wall; 34-first annular boss; 341-second annular groove; 35-second annular boss; 351-first mounting hole; 36-first inner wall; 37-second inner wall; 38-second connecting wall; 40-second supporting member; 41-second mounting hole; 51-first sealing ring; 52-second sealing ring; 61-first annular portion; 611-third inner wall; 612-fourth inner wall; 613-third connecting wall; 62-second annular portion; 63-third annular portion; 631-lug; 64-third sealing ring; 65-fourth sealing ring; 66-third annular groove; 67-fourth annular groove; a-first size; b-second Dimensions; c-thickness at the location of the first inner wall; d-thickness at the location of the second inner wall; e-third dimension; f-fourth dimension; 70-fastener; 81-liquid inlet; 82-liquid outlet; 90-rigidity reduction portion; 91-hollow portion; 92-connecting ribs; 200-motor; 210-motor shaft; 220-housing; 221-motor end cover; 2211-mounting groove; 230-first bearing; 241-oil inlet channel; 2411-oil inlet channel section; 242-oil outlet channel; 2421-oil outlet channel section; 250-iron core; 260-motor housing bearing chamber; 270-second bearing; 280-wave spring; 300-reducer; 310-third bearing; 320-fourth bearing; 330-reducer housing bearing chamber; 340-adjusting gasket; 350-reducer input shaft; 400-electric drive system. DETAILED DESCRIPTION

[0071] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0072] In the present disclosure, unless otherwise stated, the directional words used, such as "upper, lower, top, bottom", are usually defined by the drawing direction of the corresponding drawings, and are only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, and a specific orientation structure and operation, and therefore cannot be understood as a limitation of the present disclosure. "Inside and outside" refer to the inside and outside of the corresponding component outline. In addition, the terms "first", "second", etc., are used to distinguish one element from another, and do not have order and importance.

[0073] In the description of the present disclosure, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connect", "connected", and "installed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, and can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances.

[0074] Research has found that the unbalanced excitation of the motor will increase with the increase of the motor speed, especially when the motor is in the high-speed range. The higher the stiffness of the support for the motor shaft, the greater the vibration of the motor shaft. Therefore, the support stiffness of the motor shaft is an important factor affecting the vibration of the motor shaft.

[0075] In view of this, if Figures 1 to 14 As shown, according to the first aspect of the present disclosure, a motor 200 is provided, including a motor shaft 210, a support member 100 and a shell 220, the shell 220 includes a motor end cover 221, the support member 100 is supported between the outer peripheral side of the motor shaft 210 and the motor end cover 221, and the interior of the support member 100 is provided with a accommodating cavity 10 suitable for accommodating damping fluid, and the support member 100 is configured to be able to undergo elastic deformation under the abutment of the motor shaft 210.

[0076] In the present disclosure, the support member 100 can be supported between the outer peripheral side of the motor shaft 210 and the motor end cover 221, so that the motor end cover 221 supports the motor shaft 210. When the motor shaft 210 has a tendency to vibrate, the support member 100 can be elastically deformed under the impact of the motor shaft 210, thereby buffering the vibration of the motor shaft 210. Secondly, since the support member 100 is provided with a receiving chamber 10 inside, an oil film damping can be formed after a damping liquid is provided in the receiving chamber 10. When the support member 100 is elastically deformed under the impact of the motor shaft 210, the volume of the receiving chamber 10 can be compressed. In this way, the damping liquid can be used to play a buffering role, thereby buffering the vibration of the motor shaft 210. In summary, the support member 100 of the present disclosure can perform multiple buffering on the vibration of the motor shaft 210 through elastic deformation and the damping liquid in the receiving chamber 10, thereby being able to effectively suppress the vibration of the motor shaft 210.

[0077] Furthermore, the support member 100 is configured to be elastically deformed under the impact of the motor shaft 210, and can also reduce the support stiffness of the motor end cover 221 on the motor shaft 210, thereby facilitating better suppression of the vibration of the motor shaft 210. Through the above scheme, the motor shaft can be driven at a high speed, thereby facilitating the advantages of higher power density, smaller electric drive volume, lower weight, and lower material cost brought about by high speed.

[0078] In addition, the accommodating chamber 10 is arranged inside the support member 100. On the one hand, the volume of the accommodating chamber 10 can be designed larger without being limited by the size of the first bearing 230 of the motor shaft 210, allowing the size of the accommodating chamber 10 to be increased, so that the accommodating chamber 10 can accommodate enough damping fluid, which is conducive to improving the damping effect, and then the support member 100 can better suppress the vibration of the motor shaft 210. On the other hand, it can also prevent the damping fluid from contacting the surface of the motor end cover 221, thereby preventing the damping fluid from eroding the surface of the motor end cover 221.

[0079] It can be understood that the motor provided by the present disclosure can be applicable to any suitable field, especially the field requiring high rotation speed. For example, the motor can be a motor used in the vehicle field or a motor used in the wind turbine field. The present disclosure does not limit this.

[0080] The present disclosure does not limit the specific structure of the support member 100. Optionally, in some embodiments of the present disclosure, Figures 2 to 9 , Figure 12 to Figure 14 As shown, the support member 100 may include a first support sub-member 30 and a second support sub-member 40, the accommodating cavity 10 is arranged between the first support sub-member 30 and the second support sub-member 40, and at least one of the first support sub-member 30 and the second support sub-member 40 is arranged to be elastically deformed under the abutment of the motor shaft 210 to compress the volume of the accommodating cavity 10. In other words, the vibration of the motor shaft 210 can be buffered and the support stiffness of the support member 100 on the motor shaft 210 can be reduced by elastically deforming the first support sub-member 30, or by elastically deforming the second support sub-member 40, or by elastically deforming both the first support sub-member 30 and the second support sub-member 40.

[0081] Here, the first supporting sub-component 30 and the second supporting sub-component 40 may be assembled or integrally formed, which is not limited in the present disclosure.

[0082] As some embodiments of the present disclosure, Figures 2 to 9 , Figure 12 to Figure 14 As shown, the first supporting sub-component 30 is arranged on the side of the accommodating cavity 10 close to the motor shaft 210 (i.e., the side close to the motor shaft 210 along the radial direction of the motor shaft 210), and the second supporting sub-component 40 is arranged on the side of the accommodating cavity 10 away from the motor shaft 210 (i.e., the side away from the motor shaft 210 along the radial direction of the motor shaft 210), and the first supporting sub-component 30 is configured to be able to undergo elastic deformation under the pressure of the motor shaft 210.

[0083] Since the first supporting sub-component 30 is arranged on the side of the accommodating cavity 10 close to the motor shaft 210, and the second supporting sub-component 40 is arranged on the side of the accommodating cavity 10 away from the motor shaft 210, when the motor shaft 210 tends to vibrate, the first supporting sub-component 30 can elastically deform toward the second supporting sub-component 40 in time and compress the accommodating cavity 10, thereby suppressing the vibration of the motor shaft 210.

[0084] The present disclosure does not limit the structures of the first supporting sub-component 30 and the second supporting sub-component 40. Figure 1 , Figure 5 , Figure 7 , Fig. 9 and Fig.12 As shown, in some embodiments of the present disclosure, the first support sub-component 30 and the second support sub-component 40 are both annular structures, and at least a portion of the first support sub-component 30 is located radially inside the second support sub-component 40 .

[0085] By configuring the first supporting sub-component 30 and the second supporting sub-component 40 to be annular structures, the peripheral side of the motor shaft 210 can be uniformly supported by the supporting component 100 , thereby facilitating improving the vibration suppression effect of the supporting component 100 on the motor shaft 210 .

[0086] As other embodiments of the present disclosure, both the first supporting sub-component 30 and the second supporting sub-component 40 are multiple and both are block-shaped structures. The multiple first supporting sub-components 30 and the second supporting sub-components 40 correspond to each other one by one and are arranged at intervals around the circumference of the motor shaft 210.

[0087] The present disclosure does not limit the elastic deformation method of the first supporting sub-component 30. Figures 2 to 9 As shown, in some embodiments of the present disclosure, the outer wall of the first supporting sub-component 30 includes a first outer wall 31 and a second outer wall 32, the first outer wall 31 and the second outer wall 32 are arranged along the axial direction of the first supporting sub-component 30, and the second outer wall 32 is radially located on the inner side of the first outer wall 31, the first outer wall 31 is sealed and connected to the second supporting sub-component 40, the second outer wall 32 and the second supporting sub-component 40 are radially spaced apart, the accommodating cavity 10 is located between the second outer wall 32 and the second supporting sub-component 40, and the second outer wall 32 can move toward the direction of the second supporting sub-component 40 when the support component 100 undergoes elastic deformation.

[0088] Since the first outer wall 31 and the second outer wall 32 are arranged along the axial direction of the first supporting sub-component 30, the first outer wall 31 is sealed and connected to the second supporting sub-component 40, and the accommodating cavity 10 is located between the second outer wall 32 and the second supporting sub-component 40. Therefore, the first supporting sub-component 30 can form a cantilever structure, and the portion corresponding to the second outer wall 32 on the first supporting sub-component 30 can be constructed as an elastic deformation portion 20. When the elastic deformation portion 20 is pushed against by the support component 100, it can be elastically deformed, so that the second outer wall 32 moves toward the direction of the second supporting sub-component 40 and compresses the volume of the accommodating cavity 10.

[0089] Here, the sealing connection between the first outer wall 31 and the second supporting sub-component 40 can be achieved by interference fitting between the first outer wall 31 and the second supporting sub-component 40 (refer to Fig. 9 ), Figure 2 and Figure 3 The first outer wall 31 and the inner wall of the second support member 40 may also fit together. The figure shows a non-fitting state. This may also be achieved by providing a seal between the first outer wall 31 and the second support member 40, which is not limited in the present disclosure.

[0090] The present disclosure does not limit the transition structure between the first outer wall 31 and the second outer wall 32. Figure 5 and Figure 7 As shown, in some embodiments of the present disclosure, the outer wall of the first supporting sub-component 30 may also include a first connecting wall 33, which extends radially and one end of the first connecting wall 33 is connected to the first outer wall 31, and the other end of the first connecting wall 33 is connected to the second outer wall 32.

[0091] As another embodiment of the present disclosure, the first outer wall 31 and the second outer wall 32 may be connected by a cambered transition.

[0092] In order to make the accommodating chamber 10 seal the damping fluid well, Figure 2 , Figure 3 , Figure 5 and Figure 6 As shown, the support member 100 further includes a first sealing ring 51 , which is disposed between the second outer wall 32 and the inner wall of the second support sub-member 40 , and the first sealing ring 51 , the first support sub-member 30 , and the second support sub-member 40 enclose an accommodating cavity 10 .

[0093] Since the first sealing ring 51 can always maintain sealing contact with the second outer wall 32 and the inner wall of the second supporting sub-component 40 during the movement of the second outer wall 32, the first sealing ring 51 can effectively prevent the damping fluid from leaking out of the accommodating chamber 10 from between the second outer wall 32 and the inner wall of the second supporting sub-component 40, thereby allowing the accommodating chamber 10 to effectively seal the damping fluid.

[0094] like Figure 5 and Figure 6 As shown, at least one of the second outer wall 32 and the inner wall of the second supporting sub-component 40 may be provided with a first annular groove 321, and part of the first sealing ring 51 is embedded in the first annular groove 321. The first annular groove 321 limits the position of the first sealing ring 51, which not only facilitates the first sealing ring 51 to be assembled in the correct position during assembly, but also prevents the first sealing ring 51 from moving axially (such as along the axial direction of the motor shaft 210) relative to the second outer wall 32, thereby facilitating the sealing failure of the accommodating chamber 10 for the damping fluid.

[0095] In order to make the accommodating chamber 10 seal the damping fluid well, as another embodiment, Fig. 9 As shown, the first supporting sub-component 30 may further include a first annular boss 34 , which is disposed at one end of the second outer wall 32 away from the first outer wall 31 , and the supporting member 100 further includes a second sealing ring 52 , which is disposed between the outer peripheral wall of the first annular boss 34 and the motor end cover 221 .

[0096] Since the first annular boss 34 can move synchronously with the second outer wall 32, and during the movement of the first annular boss 34, the second sealing ring 52 can always maintain sealing contact with the outer peripheral wall of the first annular boss 34 and the inner wall of the motor end cover 221, the second sealing ring 52 can effectively prevent the damping fluid from leaking out of the accommodating chamber 10 from between the outer peripheral wall of the first annular boss 34 and the inner wall of the motor end cover 221, thereby enabling the accommodating chamber 10 to effectively seal the damping fluid.

[0097] Here, the accommodating cavity 10 may be defined by the end wall of the first annular boss 34 , the second outer wall 32 , the first connecting wall 33 and the inner wall of the second supporting sub-component 40 .

[0098] like Fig. 9 As shown, the outer peripheral wall of the first annular boss 34 may be provided with a second annular groove 341, and part of the second sealing ring 52 is embedded in the second annular groove 341. The second annular groove 341 limits the position of the second sealing ring 52, which not only facilitates the assembly of the second sealing ring 52 in the correct position during assembly, but also prevents the second sealing ring 52 from moving axially (such as along the axial direction of the motor shaft 210) relative to the outer peripheral wall of the first annular boss 34, thereby facilitating the sealing failure of the accommodating chamber 10 for the damping fluid.

[0099] In the present disclosure, the radial dimension of the accommodating cavity 10 along the motor shaft 210 can be set to any suitable dimension, and the present disclosure does not limit this. Figure 1 , Figure 5 and Figure 7As shown, the radial spacing between the second outer wall 32 and the inner wall of the second supporting sub-component 40 is the first dimension a (i.e., the radial dimension of the accommodating cavity 10 along the motor shaft 210), the diameter of the annular surface where the first outer wall 31 is located is the second dimension b, and the first dimension a can be 1‰~5‰ of the second dimension b. By setting the first dimension a to 1‰~5‰ of the second dimension b, the damping fluid in the accommodating cavity 10 can have a suitable thickness, which is conducive to the support member 100 to better suppress the vibration of the motor shaft 210.

[0100] Here, optionally, the second size b may be 65 mm to 75 mm.

[0101] Alternatively, if Figures 1 to 7 , Fig. 9 As shown, the motor 200 may also include a first bearing 230 sleeved on the motor shaft 210, and the inner wall of the first supporting sub-component 30 includes a first inner wall 36, a second inner wall 37 and a second connecting wall 38. The first inner wall 36 and the second inner wall 37 are arranged along the axial direction of the first supporting sub-component 30, and the second inner wall 37 is located radially on the outside of the first inner wall 36. The second inner wall 37 is connected to the first inner wall 36 through the second connecting wall 38, and the second inner wall 37 abuts against the outer peripheral wall of the first bearing 230, and the second connecting wall 38 abuts against the end wall of the first bearing 230.

[0102] The first supporting sub-component 30 can provide good support for the motor shaft 210 during rotation through the first bearing 230. The first supporting sub-component 30 abuts against the outer wall of the first bearing 230 through the second inner wall 37, and abuts against the end wall of the first bearing 230 through the second connecting wall 38, which is beneficial to improving the efficiency and accuracy of assembly between the first supporting sub-component 30 and the first bearing 230.

[0103] In order to achieve the connection between the first outer wall 31 and the second supporting sub-component 40, in one embodiment of the present disclosure, optionally, as Fig. 9 The first outer wall 31 and the inner wall of the second supporting sub-component 40 can be pressed against each other in an assembly manner with a pre-tightening force. For example, the first outer wall 31 and the inner wall of the second supporting sub-component 40 can be fitted with each other through an interference fit.

[0104] In order to realize the connection between the first outer wall 31 and the second supporting sub-component 40, optionally, in another embodiment of the present disclosure, as Figure 7As shown, the first support sub-component 30 may further include a second annular boss 35, which is disposed at one end of the first outer wall 31 away from the second outer wall 32, and a first mounting hole 351 extending axially (such as along the axial direction of the motor shaft 210) is disposed on the second annular boss 35, and a second mounting hole 41 extending axially (such as along the axial direction of the motor shaft 210) is disposed at the end of the second support sub-component 40, and the support member 100 further includes a fastener 70, which is used to connect the first mounting hole 351 and the second mounting hole 41. In other words, the first mounting hole 351 and the second mounting hole 41 can be connected by the fastener 70 to achieve the connection between the first outer wall 31 and the second support sub-component 40.

[0105] For example, the first mounting hole 351 may be a countersunk hole, the first mounting hole 351 may be a threaded hole, the fastener 70 may be a countersunk bolt, and the countersunk bolt may pass through the countersunk hole and be threadedly connected with the threaded hole to realize the connection between the first outer wall 31 and the second supporting sub-component 40. In addition, the countersunk hole may accommodate the head of the countersunk bolt, thereby avoiding interference between the fastener 70 and other structures of the motor 200 (such as the mounting groove 2211 of the motor end cover 221).

[0106] It is understandable that the first outer wall 31 and the inner wall of the second supporting sub-component 40 can be both abutted against each other in an assembly manner with a pre-tightening force and connected by a fastener 70, and the present disclosure does not limit this.

[0107] In the present disclosure, the thickness of the first inner wall 36 and the thickness of the second inner wall 37 on the first support sub-component 30 can be designed according to actual needs, and the rigidity of the first support sub-component 30 can be adjusted, thereby adjusting the rigidity of the support member 100 to the motor shaft 210. For example, the rigidity of the first support sub-component 30 can be reduced by reducing the thickness of the first inner wall 36 on the first support sub-component 30, and the rigidity of the first support sub-component 30 can also be reduced by reducing the thickness of the second inner wall 37.

[0108] Alternatively, if Figure 5 and Figure 7 As shown, the thickness c of the first inner wall 36 on the first supporting sub-component 30 may be 6.8 mm to 7.2 mm.

[0109] Alternatively, if Figure 5 and Figure 7 As shown, the thickness d of the second inner wall 37 on the first supporting sub-component 30 may be 1.8 mm to 2.2 mm.

[0110] In the present disclosure, in order to enable the support member 100 to undergo elastic deformation, in addition to the above-mentioned method of configuring the portion corresponding to the second outer wall 32 of the first support sub-member 30 as the elastic deformation portion 20, it can also be achieved in a variety of other ways. For example, as an embodiment, Figures 10 to 14 As shown, the first support sub-component 30 may be provided with a stiffness reducing portion 90, so as to facilitate elastic deformation of the support member 100 under the impact of the motor shaft 210. Moreover, by providing the stiffness reducing portion 90 on the first support sub-component 30, the stiffness of the support member 100 may be reduced, so as to facilitate the support member 100 to suppress the vibration of the motor shaft 210.

[0111] The present disclosure does not limit the structure of the first supporting sub-component 30 and the second supporting sub-component 40. As an implementation mode, Figures 11 to 13 As shown, the first supporting sub-component 30 and the second supporting sub-component 40 are both annular structures. The first supporting sub-component 30 includes a first annular portion 61 and a second annular portion 62 connected in its own axial direction. The first annular portion 61 is located on the inner side of the second supporting sub-component 40, and the accommodating cavity 10 is located between the first annular portion 61 and the second supporting sub-component 40. The second annular portion 62 is provided with a stiffness reducing portion 90.

[0112] Since the first annular portion 61 is located on the inner side of the second supporting sub-component 40 and the second annular portion 62 is provided with a stiffness reducing portion 90, when the motor shaft 210 tends to vibrate, the lower stiffness of the second annular portion 62 is conducive to the timely elastic deformation of the first annular portion 61 toward the second supporting sub-component 40 and compressing the accommodating cavity 10, thereby timely suppressing the vibration of the motor shaft 210.

[0113] In addition, configuring the first supporting sub-component 30 and the second supporting sub-component 40 as an annular structure is also beneficial for the peripheral side of the motor shaft 210 to be uniformly supported by the supporting component 100, thereby facilitating improving the vibration suppression effect of the supporting component 100 on the motor shaft 210.

[0114] The present disclosure does not limit the structure of the rigidity reducing portion 90. As an implementation method, Fig.11 As shown, the stiffness reduction portion 90 may include a hollow portion 91 located in the second annular portion 62 .

[0115] As another embodiment of the present disclosure, the reduced rigidity portion 90 may be configured as a recessed portion located in the second annular portion 62 .

[0116] The present disclosure does not limit the number of hollow portions 91. Fig.11As shown, there may be multiple hollow portions 91, and the multiple hollow portions 91 are arranged at equal intervals along the circumference of the second annular portion 62, and two adjacent hollow portions 91 are separated by connecting ribs 92. The multiple hollow portions 91 are arranged in this way, which is conducive to uniform rigidity at various locations along the circumference of the second annular portion 62, thereby helping the support member 100 to better suppress the vibration of the motor shaft 210.

[0117] In the present disclosure, the number, length and thickness of the connecting ribs 92 can be designed according to actual needs to make the support member 100 have appropriate rigidity. For example, the rigidity of the support member 100 can be reduced by reducing the number of connecting ribs 92, reducing the length of the connecting ribs 92, or designing the connecting ribs 92 to be thinner.

[0118] In order to realize the connection between the support member 100 and the housing 220, as an implementation method, Fig.11 and Fig.12 As shown, the first supporting sub-component 30 may further include a third annular portion 63, the third annular portion 63 is connected to one end of the second annular portion 62 away from the first annular portion 61, and the third annular portion 63 is connected to the housing 220 (such as the motor end cover 221). That is, the first supporting sub-component 30 is connected to the housing 220 by connecting the third annular portion 63 to the housing 220, thereby realizing the connection between the supporting component 100 and the housing 220.

[0119] Furthermore, the third annular portion 63 is connected to one end of the second annular portion 62 away from the first annular portion 61 , which can also reduce the influence of the connection between the support member 100 and the shell 220 on the movement of the first annular portion 61 toward the second supporting sub-member 40 under the support of the motor shaft 210 .

[0120] In the present disclosure, the third annular portion 63 and the housing 220 may be connected in any suitable manner, which is not limited in the present disclosure. Optionally, Figures 10 to 13 As shown, at least one connecting lug 631 is provided on the outer peripheral wall of the third annular portion 63, and the connecting lug 631 is connected to the end surface of the shell 220 through a fastener 70. For example, a third mounting hole is provided on the connecting lug 631, and a fourth mounting hole is provided on the shell 220. The fastener 70 is a threaded fastener 70, and the threaded fastener 70 passes through the third mounting hole and is threadedly connected to the fourth mounting hole, thereby realizing the connection between the third annular portion 63 and the shell 220.

[0121] Optionally, the outer circumferential wall of the third annular portion 63 is pressed against the inner circumferential wall of the shell 220 in an assembly manner with a pre-tightening force, for example, the outer circumferential wall of the third annular portion 63 is interference fit with the inner circumferential wall of the shell 220 .

[0122] The present disclosure does not limit the number of connecting lugs 631. Fig.11As shown, there may be a plurality of connecting lugs 631 , and the plurality of connecting lugs 631 are arranged at intervals along the circumferential direction of the third annular portion 63 .

[0123] Here, it can be understood that the third annular portion 63 and the shell 220 can be connected to the end face of the shell 220 through the connecting lug 631, and the outer circumferential wall of the third annular portion 63 and the inner circumferential wall of the shell 220 can be pressed against each other in an assembly manner with a preload.

[0124] In order to make the accommodating chamber 10 seal the damping fluid well, as an implementation method, Fig.13 and Fig.14 As shown, the support sub-component may also include a third sealing ring 64 and a fourth sealing ring 65. The third sealing ring 64 and the fourth sealing ring 65 are arranged at an axial interval along the first annular portion 61 between the outer peripheral wall of the first annular portion 61 and the inner wall of the second support sub-component 40. The first annular portion 61, the second support sub-component 40, the third sealing ring 64 and the fourth sealing ring 65 jointly enclose the accommodating cavity 10.

[0125] During the movement of the second annular portion 62, the third sealing ring 64 and the fourth sealing ring 65 can always maintain sealing contact with the outer peripheral wall of the first annular portion 61 and the inner wall of the second supporting sub-component 40. Therefore, the third sealing ring 64 and the fourth sealing ring 65 can effectively prevent the damping fluid from leaking out of the accommodating chamber 10 from between the outer peripheral wall of the first annular portion 61 and the inner wall of the second supporting sub-component 40, so that the accommodating chamber 10 can well seal the damping fluid.

[0126] Alternatively, if Fig.14 As shown, a third annular groove 66 may be provided on at least one of the outer peripheral wall of the second annular portion 62 and the inner wall of the second supporting sub-component 40, and a portion of the third sealing ring 64 is embedded in the third annular groove 66. The third annular groove 66 limits the third sealing ring 64, which not only facilitates the third sealing ring 64 to be assembled in the correct position during assembly, but also prevents the third sealing ring 64 from moving axially relative to the first annular portion 61 (such as along the axial direction of the motor shaft 210), thereby helping to avoid failure of the sealing of the damping fluid by the accommodating chamber 10.

[0127] Alternatively, if Fig.14 As shown, a fourth annular groove 67 may be provided on at least one of the outer peripheral wall of the second annular portion 62 and the inner wall of the second supporting sub-component 40, and a portion of the fourth sealing ring 65 is embedded in the fourth annular groove 67. The fourth annular groove 67 limits the position of the fourth sealing ring 65, which not only facilitates the assembly of the fourth sealing ring 65 in the correct position during assembly, but also prevents the fourth sealing ring 65 from moving axially (such as along the axial direction of the motor shaft 210) relative to the first annular portion 61, thereby facilitating the sealing failure of the accommodating chamber 10 for the damping fluid.

[0128] In the present disclosure, the radial dimension of the accommodating cavity 10 along the motor shaft 210 can be set to any suitable dimension, and the present disclosure does not limit this. As an implementation mode, Fig.12 and Fig.14 As shown, the radial spacing dimension between the outer peripheral wall of the first annular portion 61 and the inner wall of the second supporting sub-component 40 is the third dimension e, the diameter of the annular surface where the inner wall of the second supporting sub-component 40 is located is the fourth dimension f, and the third dimension e is 1‰~5‰ of the fourth dimension f. By setting the third dimension e to 1‰~5‰ of the fourth dimension f, the damping fluid in the accommodating cavity 10 can have a suitable thickness, which is conducive to the support member 100 to better suppress the vibration of the motor shaft 210.

[0129] Alternatively, if Fig.13 and Fig.14 As shown, the inner wall of the first annular portion 61 includes a third inner wall 611, a fourth inner wall 612 and a third connecting wall 613. The third inner wall 611 and the fourth inner wall 612 are arranged along the axial direction of the first annular portion 61. The third inner wall 611 is located radially outside the fourth inner wall 612. The fourth inner wall 612 is connected to the third inner wall 611 through the third connecting wall 613. The third inner wall 611 abuts against the outer peripheral wall of the first bearing 230 installed on the motor shaft 210, and the third connecting wall 613 abuts against the end wall of the first bearing 230.

[0130] The first annular portion 61 can provide good support for the motor shaft 210 during rotation through the first bearing 230. The first annular portion 61 abuts against the outer wall of the first bearing 230 through the third inner wall 611, and abuts against the end wall of the first bearing 230 through the third connecting wall 613, which is beneficial to improving the efficiency and accuracy of assembly between the first annular portion 61 and the first bearing 230.

[0131] Here, optionally, the fourth inner wall 612 and the inner wall of the third annular portion 63 mentioned above may be on the same annular surface to facilitate processing.

[0132] In order to prevent the damping fluid in the accommodating chamber 10 from deteriorating or settling, Figure 2 , Figure 3 , Figure 5 , Figure 7 , Fig. 9 and Fig.12 As shown, the support member 100 may also be provided with a liquid inlet 81 and a liquid outlet 82 connected to the accommodating chamber 10, and the motor end cover 221 is provided with an oil inlet channel 241 and an oil outlet channel 242. The oil inlet channel 241 is connected to the accommodating chamber 10 through the liquid inlet 81 on the support member 100, and the oil outlet channel 242 is connected to the accommodating chamber 10 through the liquid outlet 82 on the support member 100.

[0133] The oil inlet channel 241 on the motor end cover 221 is connected to the accommodating chamber 10 through the liquid inlet 81, and the oil outlet channel 242 on the motor end cover 221 is connected to the accommodating chamber 10 through the liquid outlet 82, so that the damping liquid can be injected into the accommodating chamber 10 through the oil inlet channel 241 and the liquid inlet 81, and can be discharged to the outside of the accommodating chamber 10 through the liquid outlet 82 and the oil outlet channel 242, so that the damping liquid in the accommodating chamber 10 can be replaced, thereby preventing the damping liquid in the accommodating chamber 10 from deteriorating or precipitating, which affects the vibration reduction effect on the motor shaft 210.

[0134] The present disclosure does not limit the type of the damping fluid. Optionally, the damping fluid may be lubricating oil, so that the accommodating chamber 10 may be connected to the lubricating oil circulation system of the motor 200 .

[0135] The present disclosure does not limit the arrangement of the oil inlet channel 241 and the oil outlet channel 242. Optionally, as Figure 2 and Figure 3 As shown, the oil inlet channel 241 may at least include an oil inlet channel section 2411 extending in the radial direction of the motor 200, one end of the oil inlet channel section 2411 being connected to the liquid inlet 81, and / or the oil outlet channel 242 may at least include an oil outlet channel section 2421 arranged obliquely relative to the radial direction of the motor 200, one end of the oil outlet channel section 2421 being connected to the liquid outlet 82, and the other end of the oil outlet channel section 2421 extending to the inner end surface of the motor end cover 221. In this way, the lubricating oil may circulate into the accommodating chamber 10 via the oil inlet channel section 2411 and the liquid inlet 81, and the lubricating oil circulated out of the accommodating chamber 10 may enter the interior of the housing 220 of the motor 200 via the liquid outlet 82 and the oil outlet channel section 2421 to lubricate other components of the motor 200.

[0136] The liquid inlet 81 and the liquid outlet 82 can be set at any suitable position on the support member 100 according to actual conditions, and the present disclosure does not limit this. Optionally, as Figure 2 and Figure 3 As shown, the liquid inlet 81 and the liquid outlet 82 can both be arranged on the first supporting sub-component 30.

[0137] Alternatively, if Figure 8 As shown, the liquid inlet 81 can be disposed on the second supporting sub-component 40 , and the liquid outlet 82 can be disposed on the first supporting sub-component 30 .

[0138] In order to facilitate the support member 100 to be supported between the outer peripheral side of the motor shaft 210 and the motor end cover 221, as an embodiment, as shown in FIG. Figure 2 and Figure 3 As shown, a mounting groove 2211 is provided on the inner side of the motor end cover 221 , and along the radial direction of the motor shaft 210 , a side of the support member 100 away from the motor shaft 210 abuts against the groove wall of the mounting groove 2211 .

[0139] In the present disclosure, the support member 100 can be assembled with the motor end cover 221 by any suitable method, and the present disclosure is not limited to this. Optionally, the second support sub-component 40 can be first assembled with the housing 220 by heat sleeve or precasting (such as assembling the second support sub-component 40 into the mounting groove 2211 of the motor end cover 221 by heat sleeve or precasting), and then the first sealing ring 51 can be assembled to the first sealing sub-component, and finally the first sealing sub-component and the first sealing ring 51 can be hot pressed into the second support sub-component 40 together to complete the assembly of the support member 100 and the motor end cover 221.

[0140] According to a second aspect of the present disclosure, Figure 1 As shown, an electric drive system 400 is provided, comprising the above-mentioned motor 200.

[0141] In the present disclosure, optionally, Figure 1 As shown, the electric drive system 400 may further include a reducer 300, and an input shaft 350 of the reducer is connected to the motor shaft 210. The motor shaft 210 and the input shaft 350 of the reducer may be coupled to each other through a spline segment and a gear shaft to achieve transmission connection.

[0142] like Figure 1 As shown, the motor 200 may further include an iron core 250, a motor housing bearing chamber 260, a second bearing 270 and a wave spring 280, and the reducer 300 may further include a third bearing 310, a fourth bearing 320, a reducer housing bearing chamber 330 and an adjustment gasket 340. The iron core 250 is sleeved on the motor shaft 210 for generating torque, the second bearing 270 is arranged in the motor housing bearing chamber 260 for supporting one end of the motor shaft 210 away from the motor end cover 221, and the wave spring 280 provides preload for the first bearing 230 and the second bearing 270. The third bearing 310 and the fourth bearing 320 are respectively located in two reducer housing bearing chambers 330 for supporting the two ends of the reducer input shaft 350, and the adjustment gasket 340 is used to provide preload for the third bearing 310 and the fourth bearing 320.

[0143] According to a third aspect of the present disclosure, a vehicle is provided, comprising the above-mentioned electric drive system 400 or the above-mentioned motor 200 .

[0144] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0145] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0146] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A motor, characterized in that: It comprises a motor shaft, a support member and a housing, wherein the housing comprises a motor end cover, and the support member is supported between the outer peripheral side of the motor shaft and the motor end cover; The support member is provided with a receiving cavity suitable for receiving damping fluid; The support member is configured to be able to undergo elastic deformation under the impact of the motor shaft; The support member comprises a first support member and a second support member, the accommodating cavity is arranged between the first support member and the second support member, and at least one of the first support member and the second support member is arranged to be elastically deformed under the impact of the motor shaft; The support member further comprises a sealing ring, and the sealing ring is arranged between the inner wall of the first supporting sub-member and the second supporting sub-member; The sealing ring, the first supporting sub-component and the second supporting sub-component enclose the accommodating cavity.

2. The motor according to claim 1, characterized in that The first supporting sub-component is arranged on a side of the accommodating cavity close to the motor shaft, the second supporting sub-component is arranged on a side of the accommodating cavity away from the motor shaft, and the first supporting sub-component is arranged to be able to undergo elastic deformation under the abutment of the motor shaft.

3. The motor according to claim 2, characterized in that The first supporting sub-component and the second supporting sub-component are both annular structures, and at least a portion of the first supporting sub-component is located radially inside the second supporting sub-component.

4. The motor according to claim 3, characterized in that The outer wall of the first supporting sub-component includes a first outer wall and a second outer wall, the first outer wall and the second outer wall are arranged along the axial direction of the first supporting sub-component, and the second outer wall is located on the inner side of the first outer wall in the radial direction; The first outer wall is sealed and connected to the second supporting sub-component, the second outer wall and the second supporting sub-component are spaced apart in the radial direction, the accommodating cavity is located between the second outer wall and the second supporting sub-component, and the second outer wall can move toward the second supporting sub-component when the supporting component is elastically deformed; The sealing ring comprises a first sealing ring, and the first sealing ring is arranged between the second outer wall and the inner wall of the second supporting sub-component; The first sealing ring, the first supporting sub-component and the second supporting sub-component enclose the accommodating cavity.

5. The motor according to claim 4, characterized in that The outer wall of the first supporting sub-component further includes a first connecting wall, which extends radially, and one end of the first connecting wall is connected to the first outer wall, and the other end of the first connecting wall is connected to the second outer wall.

6. The motor according to claim 4, characterized in that A first annular groove is provided on at least one of the second outer wall and the inner wall of the second supporting sub-component, and a portion of the first sealing ring is embedded in the first annular groove.

7. The motor according to claim 4, characterized in that The first supporting sub-component further includes a first annular boss, and the first annular boss is arranged at an end of the second outer wall away from the first outer wall; The support member further includes a second sealing ring, which is arranged between the outer peripheral wall of the first annular boss and the motor end cover.

8. The motor according to claim 7, characterized in that The outer peripheral wall of the first annular boss is provided with a second annular groove, and a portion of the second sealing ring is embedded in the second annular groove.

9. The motor according to claim 4, characterized in that The radial spacing dimension between the second outer wall and the inner wall of the second supporting sub-component is a first dimension, the diameter of the annular surface where the first outer wall is located is a second dimension, and the first dimension is 1‰ to 5‰ of the second dimension.

10. The motor according to claim 3, characterized in that The motor also includes a first bearing sleeved on the motor shaft, the inner wall of the first supporting sub-component includes a first inner wall, a second inner wall and a second connecting wall, the first inner wall and the second inner wall are arranged along the axial direction of the first supporting sub-component, the second inner wall is located radially on the outside of the first inner wall, the second inner wall is connected to the first inner wall through the second connecting wall, the second inner wall abuts against the outer peripheral wall of the first bearing, and the second connecting wall abuts against the end wall of the first bearing.

11. The motor according to claim 4, characterized in that The first outer wall and the inner wall of the second supporting sub-component are butted against each other in an assembly manner with a pre-tightening force.

12. The motor according to claim 4, characterized in that The first supporting sub-component further includes a second annular boss, and the second annular boss is arranged at an end of the first outer wall away from the second outer wall; The second annular boss is provided with a first mounting hole extending in the axial direction, and the end of the second supporting sub-component is provided with a second mounting hole extending in the axial direction; The support member further includes a fastener, and the fastener is used to connect the first mounting hole and the second mounting hole.

13. The motor according to claim 2, characterized in that The first supporting sub-component is provided with a stiffness reducing portion.

14. The motor according to claim 13, characterized in that The first supporting sub-component and the second supporting sub-component are both annular structures, and the first supporting sub-component includes a first annular portion and a second annular portion connected in its axial direction; The first annular portion is located on the inner side of the second supporting sub-component, and the accommodating cavity is located between the first annular portion and the second supporting sub-component; The second annular portion is provided with the stiffness reducing portion; The sealing ring further comprises a third sealing ring and a fourth sealing ring, wherein the third sealing ring and the fourth sealing ring are arranged between the outer peripheral wall of the first annular portion and the inner wall of the second supporting sub-component at intervals along the axial direction of the first annular portion; The first annular portion, the second supporting sub-component, the third sealing ring and the fourth sealing ring jointly enclose the accommodating cavity.

15. The motor according to claim 14, characterized in that The stiffness reducing portion includes a hollow portion located in the second annular portion.

16. The motor according to claim 15, characterized in that There are multiple hollow parts, and the multiple hollow parts are arranged at equal intervals along the circumference of the second annular part, and two adjacent hollow parts are separated by connecting ribs.

17. The motor according to claim 14, characterized in that The first supporting member further comprises a third annular portion, wherein the third annular portion is connected to an end of the second annular portion away from the first annular portion; The third annular portion is connected to the housing.

18. The electric machine according to claim 17, characterized in that At least one connecting lug is provided on the outer peripheral wall of the third annular portion, and the connecting lug is suitable for being connected to the end surface of the shell through a fastener; and / or, The outer circumferential wall of the third annular portion abuts against the inner circumferential wall of the shell in an assembly manner with a pre-tightening force.

19. The motor according to claim 14, characterized in that A third annular groove is provided on at least one of the outer peripheral wall of the second annular portion and the inner wall of the second supporting sub-component, and a portion of the third sealing ring is embedded in the third annular groove; and / or, A fourth annular groove is provided on at least one of the outer peripheral wall of the second annular portion and the inner wall of the second supporting sub-component, and a portion of the fourth sealing ring is embedded in the fourth annular groove.

20. The electric machine according to claim 19, characterized in that The radial spacing dimension between the outer circumferential wall of the first annular portion and the inner wall of the second supporting sub-component is a third dimension, the diameter of the annular surface where the inner wall of the second supporting sub-component is located is a fourth dimension, and the third dimension is 1‰~5‰ of the fourth dimension.

21. The electric machine according to claim 14, characterized in that The inner wall of the first annular portion includes a third inner wall, a fourth inner wall and a third connecting wall. The third inner wall and the fourth inner wall are arranged along the axial direction of the first annular portion. The third inner wall is located radially outside the fourth inner wall. The fourth inner wall is connected to the third inner wall through the third connecting wall. The third inner wall abuts against the outer peripheral wall of the first bearing installed on the motor shaft, and the third connecting wall abuts against the end wall of the first bearing.

22. The electric machine according to any one of claims 1 to 21, characterized in that The support member is also provided with a liquid inlet and a liquid outlet communicated with the accommodating cavity; The motor end cover is provided with an oil inlet channel and an oil outlet channel. The oil inlet channel is communicated with the accommodating cavity through a liquid inlet on the support member, and the oil outlet channel is communicated with the accommodating cavity through a liquid outlet on the support member.

23. The electric machine according to claim 22, characterized in that The oil inlet passage at least comprises an oil inlet passage section extending in the radial direction of the motor, one end of the oil inlet passage section being connected to the liquid inlet; and / or, The oil outlet channel at least comprises an oil outlet channel section arranged to be inclined relative to the radial direction of the motor, one end of the oil outlet channel section is connected to the liquid outlet, and the other end of the oil outlet channel section extends to the inner end surface of the motor end cover.

24. The electric machine according to any one of claims 1 to 21, characterized in that The support member is also provided with a liquid inlet and a liquid outlet communicating with the accommodating cavity, and the liquid inlet and the liquid outlet are both provided on the first supporting sub-member; or, The liquid inlet is arranged on the second supporting sub-component, and the liquid outlet is arranged on the first supporting sub-component.

25. The electric machine according to any one of claims 1 to 21, characterized in that An installation groove is arranged on the inner side of the motor end cover, and along the radial direction of the motor shaft, a side of the support member away from the motor shaft abuts against a groove wall of the installation groove.

26. An electric drive system, characterized in that: Comprising an electric machine according to any one of claims 1-25.

27. The electric drive system according to claim 26, characterized in that: The electric drive system further comprises a reducer, wherein an input shaft of the reducer is connected to the motor shaft.

28. A vehicle, characterized in that: include: The electric drive system according to claim 26 or 27; or, A motor according to any one of claims 1 to 25.

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