Supporting piece for rotating shaft, motor, electric drive system and vehicle

Abstract

The utility model relates to a supporting piece for a rotating shaft, a motor, an electric drive system and a vehicle, the supporting piece is suitable for being supported on the peripheral side of the rotating shaft, and a containing cavity suitable for containing damping fluid is formed in the supporting piece; the supporting piece is further provided with a rigidity weakening part so that the supporting piece can elastically deform under abutting of the rotating shaft. The supporting piece of the motor can perform multiple buffering on the vibration of the rotating shaft through the elastic deformation and the damping liquid in the accommodating cavity, so that the vibration of the rotating shaft can be well inhibited. Moreover, the supporting rigidity of the supporting piece to the rotating shaft can be reduced through the rigidity weakening part, so that the vibration of the rotating shaft is better inhibited, the high speed of the rotating shaft is allowed, and the rotating shaft has the advantage brought by the high speed.

Description

Technical Field

[0001] The present disclosure relates to the technical field of motors, and in particular, to a support member for a rotating shaft, 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 and smaller electric drive volume, lower weight, and lower material costs. The vibration of the shaft is an important factor limiting the speed of the motor. Therefore, how to suppress the vibration of the shaft is an important research direction in this field. Utility Model Content

[0003] The purpose of the present disclosure is to provide a support member for a rotating shaft, a motor, an electric drive system and a vehicle, so as 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 support member for a rotating shaft, the support member being suitable for being supported on the outer peripheral side of the rotating shaft, and a receiving chamber suitable for receiving damping fluid being arranged inside the support member;

[0005] The support member is also provided with a rigidity reducing portion, so that the support member is configured to be able to undergo elastic deformation under the abutment of the rotating shaft.

[0006] 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 provided with the stiffness reducing portion.

[0007] Optionally, the first supporting sub-component is suitable for being arranged on a side of the accommodating cavity close to the rotating shaft, the second supporting sub-component is suitable for being arranged on a side of the accommodating cavity away from the rotating shaft, and the first supporting sub-component is provided with the stiffness reducing portion.

[0008] 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;

[0009] 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;

[0010] The second annular portion is provided with the rigidity weakening portion.

[0011] Optionally, the stiffness reduction portion includes a hollow portion located in the second annular portion.

[0012] 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.

[0013] Optionally, the first supporting sub-component further includes a third annular portion, and the third annular portion is located at one end of the first supporting sub-component;

[0014] The third annular portion is suitable for being connected to a housing of the motor.

[0015] 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,

[0016] The outer peripheral wall of the third annular portion is suitable for abutting against the inner peripheral wall of the housing in a manner with a pre-tightening force.

[0017] Optionally, the support member further comprises a first sealing ring and a second sealing ring, wherein the first sealing ring and the second sealing ring are arranged between the outer peripheral wall of the second annular portion and the inner wall of the second supporting sub-member at intervals along the axial direction of the first annular portion;

[0018] The first annular portion, the second supporting sub-component, the first sealing ring and the second sealing ring jointly enclose the accommodating cavity.

[0019] Optionally, a first 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 first sealing ring is embedded in the first annular groove; and / or,

[0020] A second 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 second sealing ring is embedded in the second annular groove.

[0021] Optionally, 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 first dimension, the diameter of the annular surface where the inner wall of the second supporting sub-component is located is a second dimension, and the first dimension is 1‰ to 5‰ of the second dimension.

[0022] Optionally, the inner wall of the first annular portion includes a first inner wall, a second inner wall and a connecting wall, the first inner wall and the second inner wall are arranged along the axial direction of the first annular portion, the first inner wall is located radially outside the second inner wall, the second inner wall is connected to the first inner wall through the connecting wall, the first inner wall is suitable for abutting against the outer peripheral wall of a first bearing installed on the rotating shaft, and the connecting wall is suitable for abutting against the end wall of the first bearing.

[0023] Optionally, the support member is further provided with a liquid inlet and a liquid outlet communicated with the accommodating cavity;

[0024] The liquid inlet is suitable for allowing the oil inlet passage on the housing of the electric machine to communicate with the accommodating chamber, and the liquid outlet is suitable for allowing the oil outlet passage on the housing to communicate with the accommodating chamber.

[0025] According to a second aspect of the present disclosure, there is provided a motor, comprising a rotating shaft, a housing and the above-mentioned support member;

[0026] The support member is supported between the outer peripheral side of the rotation shaft and the housing.

[0027] Optionally, the housing includes a motor end cover, an inner side of the motor end cover is provided with a mounting groove, the support member is connected to the motor end cover, and at least a portion of the support member is accommodated in the mounting groove.

[0028] Optionally, a step portion is provided on the groove wall of the installation groove, and the step portion abuts against one end of the second supporting sub-component of the supporting member in the axial direction.

[0029] According to a third aspect of the present disclosure, an electric drive system is provided, comprising the above-mentioned motor.

[0030] According to a fourth aspect of the present disclosure, there is provided a vehicle, comprising:

[0031] The above-mentioned electric drive system or the above-mentioned motor.

[0032] In the present disclosure, the support member can be supported between the outer peripheral side of the rotating shaft and the housing of the motor (such as the motor end cover) to achieve the support of the rotating shaft by the motor end cover and the support of the rotating shaft by the motor housing. Since the support member is provided with a stiffness reducing portion, it is beneficial for the support member to elastically deform under the abutment of the rotating shaft, thereby buffering the vibration of the rotating 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 abutment of the rotating 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 rotating shaft. In summary, the support member disclosed in the present disclosure can perform multiple buffering on the vibration of the rotating shaft through elastic deformation and the damping liquid in the accommodating chamber, thereby being able to effectively suppress the vibration of the rotating shaft.

[0033] Furthermore, the stiffness reduction portion can also reduce the stiffness of the support member supporting the shaft, thereby helping to better suppress the vibration of the shaft. The above scheme allows the shaft to be rotated at a high speed, thereby helping the shaft to have the advantages of higher power density, smaller electric drive volume, lower weight, lower material cost, etc. brought about by the high speed.

[0034] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] 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:

[0036] 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;

[0037] Figure 2 It is a schematic diagram of a three-dimensional structure of a support member and a shell in an assembled state provided by an embodiment of the present disclosure;

[0038] Figure 3 is a schematic diagram of a three-dimensional structure of a support member provided in one embodiment of the present disclosure;

[0039] Figure 4 yes Figure 3 A schematic cross-sectional view of the support member shown;

[0040] Figure 5 yes Figure 3 A partial cross-sectional schematic diagram of the support member shown;

[0041] Figure 6 yes Figure 5 A local enlarged schematic diagram of point A in the middle.

[0042] Description of Reference Numerals

[0043] 100-support member; 10-accommodating cavity; 30-first support sub-member; 40-second support sub-member; 61-first annular portion; 611-first inner wall; 612-second inner wall; 613-connecting wall; 62-second annular portion; 63-third annular portion; 631-lug; 64-first sealing ring; 65-second sealing ring; 66-first annular groove; 67-second annular groove; a-first size; b-second size; 81-liquid inlet; 82-liquid outlet; 90-rigidity reduction portion; 91-hollow portion; 92-connection Rib; 200-motor; 210-rotating shaft; 220-housing; 221-motor end cover; 2211-mounting groove; 2212-step portion; 230-first bearing; 241-oil inlet channel; 242-oil outlet channel; 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

[0044] 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.

[0045] 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.

[0046] 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.

[0047] 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 rotating shaft, the greater the vibration of the rotating shaft. Therefore, the support stiffness of the rotating shaft is an important factor affecting the vibration of the rotating shaft.

[0048] In view of this, if Figures 1 to 6 As shown, according to the first aspect of the present disclosure, a support member 100 for a rotating shaft 210 is provided, wherein the support member 100 is suitable for being supported on the outer peripheral side of the rotating shaft 210, and a accommodating cavity 10 suitable for accommodating a damping fluid is provided inside the support member 100, and the support member 100 is also provided with a stiffness reducing portion 90, so that the support member 100 is configured to be able to undergo elastic deformation under the abutment of the rotating shaft 210.

[0049] In the present disclosure, the support member 100 can be supported between the outer peripheral side of the rotating shaft 210 and the housing 220 (such as the motor end cover 221) of the motor 200, so as to realize the support of the rotating shaft 210 by the motor end cover 221 and the support of the rotating shaft 210 by the housing 220 of the motor 200. Since the support member 100 is provided with a stiffness reducing portion 90, it is beneficial for the support member 100 to elastically deform under the abutment of the rotating shaft 210, thereby buffering the vibration of the rotating shaft 210. Secondly, since the support member 100 is provided with a accommodating chamber 10 inside, oil film damping can be formed after damping liquid is provided in the accommodating chamber 10. When the support member 100 is elastically deformed under the abutment of the rotating shaft 210, the volume of the accommodating 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 rotating shaft 210. In summary, the support member 100 of the present disclosure can perform multiple buffering on the vibration of the rotating shaft 210 through elastic deformation and the damping fluid in the accommodating cavity 10 , thereby being able to effectively suppress the vibration of the rotating shaft 210 .

[0050] Furthermore, the stiffness reduction portion 90 can also reduce the support stiffness of the support member 100 on the rotating shaft 210, thereby facilitating better suppression of vibration of the rotating shaft 210. The above solution allows the rotating shaft 210 to be operated at a high speed, thereby facilitating the rotating shaft 210 to have advantages such as higher power density, smaller electric drive volume, lower weight, and lower material cost brought about by the high speed.

[0051] 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 rotating 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 thus the support member 100 can better suppress the vibration of the rotating 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.

[0052] It can be understood that the motor 200 provided in the present disclosure can be applicable to any suitable field, especially the field requiring high rotation speed. For example, the motor 200 can be a motor 200 used in the vehicle field, or it can be a motor 200 used in the wind turbine 200 field. The present disclosure does not limit this.

[0053] The present disclosure does not limit the specific structure of the support member 100. Optionally, as shown in the figure, in one embodiment of the present disclosure, the support member 100 may include a first support sub-member 30 and a second support sub-member 40, the accommodating cavity 10 is disposed 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 provided with a stiffness reducing portion 90. In other words, by providing the stiffness reducing portion 90 on the first support sub-member 30, or by providing the stiffness reducing portion 90 on the second support sub-member 40, or by providing the stiffness reducing portion 90 on both the first support sub-member 30 and the second support sub-member 40, the support member 100 can be elastically deformed under the impact of the rotating shaft 210.

[0054] 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.

[0055] As an embodiment of the present disclosure, Figures 3 to 6 As shown, the first supporting sub-component 30 can be arranged on the side of the accommodating chamber 10 close to the rotating shaft 210, the second supporting sub-component 40 is suitable for being arranged on the side of the accommodating chamber 10 away from the rotating shaft 210, and the first supporting sub-component 30 is provided with a rigidity reducing portion 90. Since the first supporting sub-component 30 can be arranged on the side of the accommodating chamber 10 close to the rotating shaft 210, and the first supporting sub-component 30 is provided with a rigidity reducing portion 90, when the rotating shaft 210 has a tendency to vibrate, the first supporting sub-component 30 with a lower rigidity can timely suppress the vibration of the rotating shaft 210.

[0056] 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, Figure 3 and Figure 4 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.

[0057] 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 rotating shaft 210 tends to vibrate, the lower stiffness of the second annular portion 62 is beneficial 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 facilitating timely suppression of the vibration of the rotating shaft 210.

[0058] 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 rotating shaft 210 to be uniformly supported by the supporting member 100, thereby facilitating improving the vibration suppression effect of the supporting member 100 on the rotating shaft 210.

[0059] The present disclosure does not limit the structure of the rigidity reducing portion 90. As an implementation method, Figure 3 and Figure 4 As shown, the stiffness reduction portion 90 includes a hollow portion 91 located in the second annular portion 62 .

[0060] As another embodiment of the present disclosure, the rigidity weakening portion 90 may include a recessed portion located in the second annular portion 62 .

[0061] The present disclosure does not limit the number of hollow portions 91. Figure 3 and Figure 4 As shown, there are multiple hollow parts 91, and the multiple hollow parts 91 are arranged at equal intervals along the circumference of the second annular portion, and two adjacent hollow parts 91 are separated by connecting ribs 92. Providing multiple hollow parts 91 and arranging multiple hollow parts 91 in this way is conducive to uniform rigidity of the circumference of the second annular portion 62, so as to help the support member 100 better suppress the vibration of the rotating shaft 210.

[0062] 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.

[0063] In order to realize the connection between the support member 100 and the housing 220, as an implementation method, Figure 5 As shown, the first supporting sub-component 30 may include a third annular portion 63, which may be located at one end of the first supporting sub-component 30 and connected to the housing 220 of the motor 200 via the third annular portion 63, thereby realizing the connection between the first supporting sub-component 30 and the housing 220, thereby realizing the connection between the supporting component 100 and the housing 220.

[0064] In an embodiment where the first supporting sub-component 30 includes a first annular portion 61 and a second annular portion 62, the third annular portion 63 can be connected to an end of the second annular portion 62 away from the first annular portion 61, and can also reduce the influence of the connection between the supporting member 100 and the shell 220 on the movement of the first annular portion 61 toward the second supporting sub-component 40 under the pressure of the rotating shaft 210.

[0065] 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 1 to 5As 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 suitable for connecting to the end surface of the housing 220 of the motor 200 through a fastener. For example, a first mounting hole is provided on the connecting lug 631, a second mounting hole is provided on the housing 220, and the fastener is a threaded fastener, which passes through the first mounting hole and is threadedly connected to the second mounting hole, so as to realize the connection between the third annular portion 63 and the housing 220.

[0066] Optionally, the outer circumferential wall of the third annular portion 63 is suitable for abutting against the inner circumferential wall of the housing 220 of the motor 200 with a preload, for example, the outer circumferential wall of the third annular portion 63 is interference fit with the inner circumferential wall of the housing 220 .

[0067] The present disclosure does not limit the number of connecting lugs 631. Figure 1 and Figure 2 As 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 .

[0068] 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.

[0069] In order to make the accommodating chamber 10 seal the damping fluid well, as an implementation method, Figure 5 and Figure 6 As shown, the support member 100 may also include a first sealing ring 64 and a second sealing ring 65, which are arranged at an axial interval along the first annular portion 61 between the outer peripheral wall of the second annular portion 62 and the inner wall of the second supporting sub-component 40, and the first annular portion 61, the second supporting sub-component 40, the first sealing ring 64 and the second sealing ring 65 together enclose the accommodating cavity 10.

[0070] During the movement of the second annular portion 62, the first sealing ring 64 and the second 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 first sealing ring 64 and the second 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, thereby enabling the accommodating chamber 10 to effectively seal the damping fluid.

[0071] Alternatively, if Figure 6As shown, a first annular groove 66 is 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 first sealing ring 64 is embedded in the first annular groove 66. The first annular groove 66 limits the first sealing ring 64, which not only facilitates the first sealing ring 64 to be assembled in the correct position during assembly, but also prevents the first sealing ring 64 from axially moving relative to the first annular portion 61, thereby helping to avoid failure of the sealing of the damping fluid by the accommodating chamber 10.

[0072] Alternatively, if Figure 6 As shown, a second annular groove 67 is 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 second sealing ring 65 is embedded in the second annular groove 67. The second annular groove 67 limits the position of the second sealing ring 65, which not only facilitates the assembly of the second sealing ring 65 in the correct position during assembly, but also prevents the second sealing ring 65 from axially moving relative to the first annular portion 61, thereby facilitating the sealing failure of the accommodating chamber 10 to the damping fluid.

[0073] In the present disclosure, the radial dimension of the accommodating cavity 10 along the rotating shaft 210 can be set to any suitable dimension, and the present disclosure does not limit this. As an implementation mode, Figure 4 and Figure 6 As shown, the radial spacing between the outer circumferential wall of the first annular portion 61 and the inner wall of the second supporting sub-component 40 is a first dimension a, the diameter of the annular surface where the inner wall of the second supporting sub-component 40 is located is a second dimension b, and the first dimension a is 1‰ to 5‰ of the second dimension b. By setting the first dimension a to 1‰ to 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 rotating shaft 210.

[0074] Alternatively, if Figure 5 and Figure 6 As shown, the inner wall of the first annular portion 61 may include a first inner wall 611, a second inner wall 612 and a connecting wall 613. The first inner wall 611 and the second inner wall 612 are arranged along the axial direction of the first annular portion 61. The first inner wall 611 is located radially on the outside of the second inner wall 612. The second inner wall 612 is connected to the first inner wall 611 through the connecting wall 613. The first inner wall 611 is suitable for abutting against the outer peripheral wall of the first bearing 230 installed on the rotating shaft 210, and the connecting wall 613 is suitable for abutting against the end wall of the first bearing 230.

[0075] The first annular portion 61 can provide good support for the rotating 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 first inner wall 611, and abuts against the end wall of the first bearing 230 through the connecting wall 613, which is beneficial to improving the efficiency and accuracy of the assembly between the first annular portion 61 and the first bearing 230.

[0076] Here, optionally, the second 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.

[0077] In order to prevent the damping fluid in the accommodating chamber 10 from deteriorating or settling, Figure 4 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, the liquid inlet 81 is suitable for connecting the oil inlet channel 241 on the shell 220 of the power motor 200 with the accommodating chamber 10, and the liquid outlet 82 is suitable for connecting the oil outlet channel 242 on the shell 220 with the accommodating chamber 10.

[0078] 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 rotating shaft 210.

[0079] 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 .

[0080] According to a second aspect of the present disclosure, Figure 1 As shown, a motor 200 is provided, including a rotating shaft 210 , a housing 220 and the above-mentioned support member 100 , wherein the support member 100 is supported between the outer circumference of the rotating shaft 210 and the housing 220 .

[0081] In the present disclosure, the support member 100 can be connected to any suitable position of the housing 220. As an embodiment, Figure 4 and Figure 5 As shown, the housing 220 includes a motor end cover 221 , an installation groove 2211 is provided on the inner side of the motor end cover 221 , the support member 100 is connected to the motor end cover 221 , and at least a portion of the support member 100 is accommodated in the installation groove 2211 .

[0082] In order to facilitate the assembly of the support member 100 and the mounting groove 2211, as an implementation method, Figure 5As shown, a step portion 2212 is provided on the groove wall of the installation groove 2211, and the step portion 2212 abuts against one end of the second support sub-component 40 of the support member 100 located in the axial direction. When assembling the support member 100, one end of the second support sub-component 40 located in the axial direction can abut against the step portion 2212, so that the second support member 100 can be quickly and accurately assembled in a preset position, thereby facilitating the assembly of the support member 100 and the installation groove 2211.

[0083] According to the third aspect of the present disclosure, Figure 1 As shown, an electric drive system 400 is provided, comprising the above-mentioned motor 200.

[0084] In the present disclosure, optionally, Figure 1 As shown, the electric drive system 400 further includes a reducer 300, and an input shaft 350 of the reducer is connected to the rotating shaft 210. The rotating shaft 210 and the input shaft 350 of the reducer can be connected to each other through the spline segment and the gear shaft to achieve transmission connection.

[0085] 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 adjusting gasket 340. The iron core 250 is sleeved on the rotating shaft 210 for generating torque, the second bearing 270 is arranged in the motor housing bearing chamber 260 for supporting one end of the rotating 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 adjusting gasket 340 is used to provide preload for the third bearing 310 and the fourth bearing 320.

[0086] According to a fourth aspect of the present disclosure, a vehicle is provided, comprising the above-mentioned electric drive system 400 or the above-mentioned motor 200 .

[0087] 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.

[0088] 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.

[0089] 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 support member for a rotating shaft, characterized in that: The support member is suitable for being supported on the outer peripheral side of the rotating shaft, and a receiving cavity suitable for receiving the damping fluid is arranged inside the support member; The support member is also provided with a rigidity reducing portion, so that the support member is configured to be able to undergo elastic deformation under the abutment of the rotating shaft.

2. The support member according to claim 1, characterized in that 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 provided with the stiffness reducing portion.

3. The support member according to claim 2, characterized in that: The first supporting sub-component is suitable for being arranged on a side of the accommodating cavity close to the rotating shaft, the second supporting sub-component is suitable for being arranged on a side of the accommodating cavity away from the rotating shaft, and the first supporting sub-component is provided with the stiffness reducing portion.

4. The support member according to claim 3, 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 own 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 rigidity weakening portion.

5. The support member according to claim 4, characterized in that The stiffness reducing portion includes a hollow portion located in the second annular portion.

6. The support member according to claim 5, 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.

7. The support member according to claim 3, characterized in that: The first supporting sub-component further includes a third annular portion, and the third annular portion is located at one end of the first supporting sub-component; The third annular portion is suitable for being connected to a housing of the motor.

8. The support member according to claim 7, 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 peripheral wall of the third annular portion is suitable for abutting against the inner peripheral wall of the housing in a manner with a pre-tightening force.

9. The support member according to any one of claims 4 to 6, characterized in that: The support member further comprises a first sealing ring and a second sealing ring, wherein the first sealing ring and the second sealing ring are arranged between the outer peripheral wall of the second annular portion and the inner wall of the second supporting sub-member at intervals along the axial direction of the first annular portion; The first annular portion, the second supporting sub-component, the first sealing ring and the second sealing ring jointly enclose the accommodating cavity.

10. The support member according to claim 9, characterized in that A first 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 first sealing ring is embedded in the first annular groove; and / or, A second 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 second sealing ring is embedded in the second annular groove.

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

12. The support member according to claim 4, characterized in that The inner wall of the first annular portion includes a first inner wall, a second inner wall and a connecting wall. The first inner wall and the second inner wall are arranged along the axial direction of the first annular portion. The first inner wall is located radially outside the second inner wall. The second inner wall is connected to the first inner wall through the connecting wall. The first inner wall is suitable for abutting against the outer peripheral wall of a first bearing installed on the rotating shaft, and the connecting wall is suitable for abutting against the end wall of the first bearing.

13. The support member according to any one of claims 1 to 8, characterized in that: The support member is also provided with a liquid inlet and a liquid outlet communicated with the accommodating cavity; The liquid inlet is suitable for allowing the oil inlet passage on the housing of the electric machine to communicate with the accommodating chamber, and the liquid outlet is suitable for allowing the oil outlet passage on the housing to communicate with the accommodating chamber.

14. A motor, characterized in that: comprising a rotating shaft, a housing and a support member according to any one of claims 1 to 13; The support member is supported between the outer peripheral side of the rotation shaft and the housing.

15. The motor according to claim 14, characterized in that The housing comprises a motor end cover, an inner side of the motor end cover is provided with a mounting groove, the support member is connected to the motor end cover, and at least a part of the support member is accommodated in the mounting groove.

16. The motor according to claim 15, characterized in that A step portion is arranged on the groove wall of the installation groove, and the step portion abuts against one end of the second supporting sub-component of the supporting component in the axial direction.

17. An electric drive system, characterized in that: Comprising an electric machine according to any one of claims 14-16.

18. A vehicle, characterized in that: include: The electric drive system according to claim 17; or, A motor according to any one of claims 14 to 16.

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