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 can be supported on the peripheral side of the rotating shaft, a cavity is formed in the supporting piece and suitable for containing damping liquid, and the size of the cavity can be changed when the rotating shaft abuts against the supporting piece. The supporting piece is internally provided with the cavity, the damping liquid can be arranged in the cavity to form oil film damping, the vibration of the rotating shaft can be buffered through the buffering effect of the damping liquid in the cavity, and therefore the vibration of the rotating shaft is well restrained, and the size of the cavity is changed, so that the vibration of the rotating shaft is reduced. Therefore, the part, corresponding to the cavity, of the supporting piece is deformed and / or moved, the supporting rigidity of the supporting piece to the rotating shaft is reduced to a certain extent, vibration of the rotating shaft is better restrained, the high speed of the rotating shaft is allowed, and the rotating shaft has the advantage of being high in 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 adapted to be supported on the outer peripheral side of the rotating shaft, a cavity being provided inside the support member, the cavity being adapted to contain a damping fluid;

[0005] The volume of the cavity can change when the rotating shaft abuts against the support member.

[0006] Optionally, the support member includes a first support portion and a second support portion, the first support portion is connected to or integrally formed with the second support portion, the cavity is arranged between the first support portion and the second support portion, and at least a portion of the first support portion and at least a portion of the second support portion can move relative to each other when the rotating shaft is abutted, so that the volume of the cavity changes.

[0007] Optionally, the first support portion is suitable for being arranged on a side of the cavity close to the rotating shaft, the second support portion is suitable for being arranged on a side of the cavity away from the rotating shaft, and the first support portion is provided with an elastic deformation portion, which can be deformed when the rotating shaft abuts against the top to change the volume of the cavity.

[0008] Optionally, both the first support portion and the second support portion are annular support portions, and the elastic deformation portion of the first support portion is suitable for being located radially inside the second support portion.

[0009] Optionally, the outer side wall of the first support portion includes a first outer side wall and a second outer side wall, the first outer side wall and the second outer side wall are arranged along the axial direction of the first support portion, and the second outer side wall is located radially inside the first outer side wall;

[0010] The first outer side wall is sealingly connected to the second support portion, the second outer side wall and the second support portion are radially spaced apart, the cavity is located between the second outer side wall and the second support portion, and the elastic deformation portion includes a portion corresponding to the second outer side wall.

[0011] Optionally, a radial spacing dimension between the second outer side wall and the inner side wall of the second support portion is a first dimension, a diameter of an annular surface where the first outer side wall is located is a second dimension, and the first dimension is 1‰ to 5‰ of the second dimension.

[0012] Optionally, the first supporting portion further includes a first annular protrusion, and the first annular protrusion is arranged at an end of the second outer side wall away from the first outer side wall;

[0013] The support member further includes a first sealing ring, which is suitable for being arranged between the outer peripheral wall of the first annular protrusion and the housing of the motor.

[0014] Optionally, a first annular mounting groove is provided on an outer peripheral wall of the first annular protrusion, and the first sealing ring is installed in the first annular mounting groove and has a portion protruding from the first annular mounting groove.

[0015] Optionally, the support member further comprises a second sealing ring, and the second sealing ring is arranged between the second outer side wall and the inner side wall of the second supporting portion;

[0016] The second sealing ring, the first supporting portion and the second supporting portion enclose the cavity.

[0017] Optionally, the second outer side wall and / or the inner side wall of the second supporting portion is provided with a second annular mounting groove, and the second sealing ring is installed in the second annular mounting groove and has a portion protruding from the second annular mounting groove.

[0018] Optionally, the inner side wall of the first support portion includes a first inner side wall, a second inner side wall and a connecting wall, the first inner side wall and the second inner side wall are arranged along the axial direction of the first support portion, the second inner side wall is located radially on the outside of the first inner side wall, the second inner side wall is connected to the first inner side wall through the connecting wall, the second inner side wall is suitable for abutting against the outer peripheral wall of the first bearing located on the rotating shaft, and the connecting wall is suitable for abutting against the end wall of the first bearing.

[0019] Optionally, the first outer side wall is interference fit with the inner side wall of the second supporting portion.

[0020] Optionally, the first supporting portion further includes a second annular protrusion, and the second annular protrusion is arranged at an end of the first outer side wall away from the second outer side wall;

[0021] The support member further includes a fastener for connecting the second annular protrusion to the second support portion.

[0022] Optionally, the support member is further provided with a liquid inlet and a liquid outlet communicated with the cavity.

[0023] Optionally, the liquid inlet is suitable for communicating with an oil inlet channel of lubricating oil on the motor, the liquid outlet is suitable for communicating with an oil outlet channel of lubricating oil on the motor, and the damping liquid is lubricating oil.

[0024] 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;

[0025] The support member is supported between the outer peripheral side of the rotation shaft and the housing.

[0026] According to a third aspect of the present disclosure, an electric drive system is provided, comprising the above-mentioned motor.

[0027] Optionally, the electric drive system further includes a reducer, and an input shaft of the reducer is connected to the rotating shaft of the motor.

[0028] According to a fourth aspect of the present disclosure, a vehicle is provided, comprising the above-mentioned electric drive system or the above-mentioned motor.

[0029] 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 to realize the support of the rotating shaft by the housing of the motor. Since a cavity is provided inside the support member, a damping liquid can be provided in the cavity to form oil film damping. When the volume of the cavity changes when the rotating shaft hits the support member, the buffering effect of the damping liquid in the cavity can be utilized to buffer the vibration of the rotating shaft, thereby effectively suppressing the vibration of the rotating shaft.

[0030] Moreover, the change in the volume of the cavity means that the portion of the support member corresponding to the cavity is deformed and / or moved, which is helpful to reduce the support stiffness of the support member on the shaft to a certain extent, thereby helping to better suppress the vibration of the shaft. Through the above scheme, the shaft can be allowed to be high-speed, which is beneficial for the shaft to have the advantages of higher power density and smaller electric drive volume, lower weight, lower material cost, etc. brought by high speed.

[0031] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] 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:

[0033] 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;

[0034] Figure 2 yes Figure 1 A local enlarged schematic diagram of the middle A;

[0035] Figure 3 yes Figure 1 A partial enlarged schematic diagram of point B in the middle;

[0036] Figure 4 is a schematic diagram of the three-dimensional structure of a support member provided in the first embodiment of the present disclosure;

[0037] Figure 5 is a partial cross-sectional schematic diagram of a support member provided in a first embodiment of the present disclosure;

[0038] Figure 6 is a schematic diagram of the three-dimensional structure of a support member provided in a second embodiment of the present disclosure;

[0039] Figure 7 is a partial cross-sectional schematic diagram of a support member provided in a second embodiment of the present disclosure;

[0040] Figure 8 is a schematic diagram of a three-dimensional structure of a support member provided in a third embodiment of the present disclosure;

[0041] Fig. 9 yes Figure 8 A partial cross-sectional schematic diagram of the support member shown.

[0042] Description of Reference Numerals

[0043] 100-support member; 10-cavity; 20-elastic deformation part; 30-first support part; 31-first outer wall; 32-second outer wall; 321-second annular mounting groove; 33-transition wall; 34-first annular protrusion; 341-first annular mounting groove; 35-second annular protrusion; 351-first mounting hole; 36-first inner wall; 37-second inner wall; 38-connecting wall; 40-second support part; 41-second mounting hole; 51-second sealing ring; 52-first sealing ring; a-first size; b-second size; c-thickness at the location of the first inner wall; d-thickness at the location of the second inner wall; 70- Fasteners; 81-liquid inlet; 82-liquid outlet; 200-motor; 210-rotating shaft; 220-housing; 221-motor end cover; 2211-mounting groove; 230-first bearing; 241-oil inlet channel for lubricating oil; 2411-oil inlet channel section; 242-oil outlet channel for lubricating oil; 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

[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 9 As shown, according to the first aspect of the present disclosure, a support member 100 for a rotating shaft 210 is provided. The support member 100 can be supported on the outer peripheral side of the rotating shaft 210. A cavity 10 is provided inside the support member 100. The cavity 10 is suitable for accommodating damping fluid. The volume of the cavity 10 can change when the rotating shaft 210 presses against the support member 100.

[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 of the motor 200, so that the housing 220 of the motor 200 supports the rotating shaft 210. Since a cavity 10 is provided inside the support member 100, a damping liquid can be provided in the cavity 10 to form oil film damping. When the volume of the cavity 10 changes when the rotating shaft 210 presses against the support member 100, the buffering effect of the damping liquid in the cavity 10 can be utilized to buffer the vibration of the rotating shaft 210, thereby effectively suppressing the vibration of the rotating shaft 210.

[0050] Furthermore, the change in the volume of the cavity 10 means that the portion of the support member 100 corresponding to the cavity 10 is deformed and / or moved. Due to the elastic deformation or movement of the portion of the support member 100 corresponding to the cavity 10, it is helpful to reduce the support stiffness of the support member 100 on the rotating shaft 210 to a certain extent, thereby helping to better suppress the vibration of the rotating shaft 210. Through the above scheme, the high speed of the rotating shaft 210 can be allowed, which is beneficial for the rotating shaft 210 to have the advantages of higher power density and smaller electric drive volume, lower weight, lower material cost, etc. brought by the high speed.

[0051] In addition, the cavity 10 is arranged inside the support member 100. On the one hand, the volume of the cavity 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 cavity 10 to be increased, so that the cavity 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 rotating shaft 210. On the other hand, it can also prevent the damping fluid from contacting the surface of the housing 220 of the motor 200, thereby preventing the damping fluid from eroding the surface of the housing 220.

[0052] Here, the support member 100 is arranged between the outer peripheral side of the rotating shaft 210 and the housing 220 of the motor 200, which may refer to that the support member 100 is arranged between the outer peripheral side of the rotating shaft 210 and the motor end cover 221 of the housing 220 of the motor 200, or it may refer to that the support member 100 is arranged between the outer peripheral side of the rotating shaft 210 and other parts of the housing 220 of the motor 200. For example, in addition to the motor end cover 221, a mounting portion may be specially provided on the housing 220, and the mounting portion is used for the rotating shaft 210 to pass through and support the rotating shaft 210, and the present disclosure does not limit this.

[0053] It is understandable that the motor 200 provided in the present disclosure can be applicable to any suitable field, especially fields requiring high rotation speed. For example, the motor 200 can be a motor used in the vehicle field or a motor used in the wind turbine field, and the present disclosure does not limit this.

[0054] 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 As shown, the support member 100 may include a first support portion 30 and a second support portion 40, the cavity 10 is disposed between the first support portion 30 and the second support portion 40, and at least a portion of the first support portion 30 and at least a portion of the second support portion 40 can move relative to each other when the rotating shaft 210 abuts against the top, so that the volume of the cavity 10 changes. In other words, the vibration of the rotating shaft 210 can be buffered and the support stiffness of the support member 100 on the rotating shaft 210 can be reduced by moving the first support portion 30 toward the second support portion 40, or by moving the second support portion 40 toward the first support portion 30, or by moving the first support portion 30 and the second support portion 40 toward each other.

[0055] Here, the first support portion 30 and the second support portion 40 may be assembled or integrally formed, and the present disclosure does not limit this.

[0056] As some embodiments of the present disclosure, Figures 2 to 9 As shown, the first support portion 30 is arranged on a side of the cavity 10 close to the rotating shaft 210 (i.e., the side close to the rotating shaft 210 along the radial direction of the rotating shaft 210), and the second support portion 40 is arranged on a side of the cavity 10 away from the rotating shaft 210 (i.e., the side away from the rotating shaft 210 along the radial direction of the rotating shaft 210). The first support portion 30 is provided with an elastic deformation portion 20, which can be deformed when the rotating shaft 210 is pressed against the top, so that the volume of the cavity 10 changes.

[0057] Since the first support portion 30 is arranged on the side of the cavity 10 close to the rotating shaft 210, and the second support portion 40 is arranged on the side of the cavity 10 away from the rotating shaft 210, when the rotating shaft 210 has a tendency to vibrate, the elastic deformation portion 20 on the first support portion 30 can be elastically deformed toward the second support portion 40 in time, thereby moving relative to the second support portion 40, thereby compressing the cavity 10. In other words, the support member 100 of the present disclosure can cause the first support portion 30 and the second support portion 40 to move relative to each other through the elastic deformation of the elastic deformation portion 20, thereby changing the volume of the cavity 10. In addition, in addition to changing the volume of the cavity 10 when deforming, the elastic deformation portion 20 itself can multiple-buffer the vibration of the rotating shaft 210 with the damping fluid in the cavity 10 because it is an elastic structure, thereby better suppressing the vibration of the rotating shaft 210.

[0058] The present disclosure does not limit the structures of the first support portion 30 and the second support portion 40. Figure 1 , Figure 5 , Figure 7 and Fig. 9 As shown, in some embodiments of the present disclosure, the first support portion 30 and the second support portion 40 are both annular support portions, and the elastic deformation portion 20 of the first support portion 30 is located radially inside the second support portion 40 .

[0059] By configuring the first support portion 30 and the second support portion 40 as annular support portions, the peripheral side of the rotating shaft 210 can be uniformly supported by the support member 100 , thereby facilitating improving the vibration suppression effect of the supporting member 100 on the rotating shaft 210 .

[0060] As other embodiments of the present disclosure, both the first support portion 30 and the second support portion 40 are multiple and both are block-shaped structures. The multiple first support portions 30 and the second support portions 40 correspond to each other one by one and are arranged at intervals around the circumference of the rotating shaft 210 .

[0061] The present disclosure does not limit the elastic deformation method of the first support portion 30. Figures 2 to 9 As shown, in some embodiments of the present disclosure, the outer wall of the first support portion 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 support portion 30, and the second outer wall 32 is located radially on the inner side of the first outer wall 31, the first outer wall 31 is sealed and connected to the second support portion 40, the second outer wall 32 and the second support portion 40 are radially spaced apart, the cavity 10 is located between the second outer wall 32 and the second support portion 40, and the elastic deformation portion 20 includes a portion corresponding to the second outer wall 32.

[0062] Since the first outer wall 31 and the second outer wall 32 are arranged along the axial direction of the first support part 30, the first outer wall 31 is sealed and connected to the second support part 40, and the cavity 10 is located between the second outer wall 32 and the second support part 40. Therefore, the first support part 30 can form a cantilever structure, and the part corresponding to the second outer wall 32 on the first support part 30 can be constructed as an elastic deformation part 20. When the elastic deformation part 20 is pushed against by the support member 100, it can be elastically deformed, so that the second outer wall 32 moves toward the direction of the second support part 40 and compresses the volume of the cavity 10.

[0063] Here, the sealing connection between the first outer side wall 31 and the second support portion 40 can be achieved by interference fitting between the first outer side wall 31 and the second support portion 40 (refer to Fig. 9 ), Figure 2 and Figure 3 The first outer wall 31 and the inner wall of the second support portion 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 portion 40, which is not limited in the present disclosure.

[0064] The present disclosure does not limit the transition structure between the first outer side wall 31 and the second outer side wall 32. Figure 5 and Figure 7 As shown, in some embodiments of the present disclosure, the outer side wall of the first support portion 30 may further include a transition wall 33, which extends radially, and one end of the transition wall 33 is connected to the first outer side wall 31, and the other end of the transition wall 33 is connected to the second outer side wall 32.

[0065] As another embodiment of the present disclosure, the first outer side wall 31 and the second outer side wall 32 may also be connected by a curved surface transition.

[0066] In the present disclosure, the radial dimension of the cavity 10 along the rotating shaft 210 can be set to any suitable dimension, and the present disclosure does not limit this. Figure 1 , Figure 5 and Figure 7 As shown, the radial spacing between the second outer wall 32 and the inner wall of the second support portion 40 is the first dimension a (i.e., the radial dimension of the cavity 10 along the 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‰ 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 cavity 10 can have a suitable thickness, which is conducive to the support member 100 to better suppress the vibration of the shaft 210.

[0067] Here, the second size b may be 65 mm to 75 mm.

[0068] In the present disclosure, the thickness of the first inner side wall 36 and the thickness of the second inner side wall 37 on the first support portion 30 can be designed according to actual needs, and the rigidity of the first support portion 30 can be adjusted, thereby adjusting the rigidity of the support member 100 to the rotating shaft 210. For example, the rigidity of the first support portion 30 can be reduced by reducing the thickness of the first inner side wall 36 on the first support portion 30, and the rigidity of the first support portion 30 can also be reduced by reducing the thickness of the second inner side wall 37.

[0069] Alternatively, if Figure 5 and Figure 7 As shown, the thickness c of the first inner side wall 36 on the first support portion 30 may be 6.8 mm to 7.2 mm.

[0070] Alternatively, if Figure 5 and Figure 7 As shown, the thickness d of the second inner wall 37 on the first support portion 30 may be 1.8 mm to 2.2 mm.

[0071] In order to make the cavity 10 seal the damping fluid well, as an implementation method, Fig. 9 As shown, the first support portion 30 may include a first annular protrusion 34, which is arranged at an end of the second outer wall 32 away from the first outer wall 31, and the support member 100 also includes a first sealing ring 52, which may be arranged between the outer peripheral wall of the first annular protrusion 34 and the housing 220 of the motor 200.

[0072] Since the first annular protrusion 34 can move synchronously with the second outer side wall 32, and during the movement of the first annular protrusion 34, the first sealing ring 52 can always maintain sealing contact with the outer peripheral wall of the first annular protrusion 34 and the inner side wall of the motor end cover 221, the first sealing ring 52 can effectively prevent the damping fluid from leaking out of the cavity 10 between the outer peripheral wall of the first annular protrusion 34 and the housing 220 of the motor 200, so that the cavity 10 can effectively seal the damping fluid.

[0073] Here, the cavity 10 may be defined by the end wall of the first annular protrusion 34 , the second outer side wall 32 , and the inner side wall of the second support portion 40 .

[0074] like Fig. 9As shown, the outer peripheral wall of the first annular protrusion 34 may be provided with a first annular mounting groove 341, and the first sealing ring 52 is mounted in the first annular mounting groove 341 and has a portion protruding from the first annular mounting groove 341. The first annular mounting groove 341 limits the first sealing ring 52, which not only facilitates the first sealing ring 52 to be assembled in the correct position during assembly, but also prevents the first sealing ring 52 from axially moving relative to the outer peripheral wall of the first annular protrusion 34, thereby facilitating the cavity 10 from sealing failure of the damping fluid.

[0075] In order to make the cavity 10 seal the damping fluid well, as another embodiment, Figure 2 , Figure 3 , Figure 5 and Figure 6 As shown, the support member 100 may include a second sealing ring 51 , which is disposed between the second outer side wall 32 and the inner side wall of the second support portion 40 , and a cavity 10 is enclosed between the second sealing ring 51 , the first support portion 30 , and the second support portion 40 .

[0076] Since the second sealing ring 51 can always maintain sealing contact with the second outer wall 32 and the inner wall of the second support portion 40 during the movement of the second outer wall 32, the second sealing ring 51 can effectively prevent the damping fluid from leaking out of the cavity 10 from between the second outer wall 32 and the inner wall of the second support portion 40, thereby allowing the cavity 10 to effectively seal the damping fluid.

[0077] like Figure 5 and Figure 6 As shown, at least one of the second outer side wall 32 and the inner side wall of the second support portion 40 may be provided with a second annular mounting groove 321, and the second sealing ring 51 is installed in the second annular mounting groove 321 and has a portion protruding from the second annular mounting groove 321. The second annular mounting groove 321 limits the position of the second sealing ring 51, which not only facilitates the assembly of the second sealing ring 51 in the correct position during assembly, but also prevents the second sealing ring 51 from axially moving relative to the second outer side wall 32, thereby facilitating the cavity 10 from sealing failure of the damping fluid.

[0078] Alternatively, if Figures 1 to 7 , Fig. 9 As shown, the inner wall of the first support portion 30 may include a first inner wall 36, a second inner wall 37 and a connecting wall 38. The first inner wall 36 and the second inner wall 37 are arranged along the axial direction of the first support portion 30. 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 connecting wall 38. The second inner wall 37 abuts against the outer peripheral wall of the first bearing 230, and the connecting wall 38 abuts against the end wall of the first bearing 230.

[0079] The first support portion 30 can provide good support for the rotating shaft 210 during rotation through the first bearing 230. The first support portion 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 connecting wall 38, which is beneficial to improving the efficiency and accuracy of assembly between the first support portion 30 and the first bearing 230.

[0080] In order to achieve the connection between the first outer side wall 31 and the second supporting portion 40, in one embodiment of the present disclosure, as shown in FIG. Fig. 9 As shown, the first outer side wall 31 can be interference fit with the inner side wall of the second support portion 40, that is, the first outer side wall 31 and the inner side wall of the second support portion 40 are pressed against each other in an assembly manner with a pre-tightening force.

[0081] In order to realize the connection between the first outer side wall 31 and the second supporting portion 40, optionally, in another embodiment of the present disclosure, as Figure 7 As shown, the first support portion 30 may further include a second annular protrusion 35 , which is disposed at an end of the first outer side wall 31 away from the second outer side wall 32 , and the support member 100 further includes a fastener 70 , which is used to connect the second annular protrusion 35 to the second support portion 40 .

[0082] For example, the second annular protrusion 35 may be provided with an axially extending first mounting hole 351, and the end of the second support portion 40 may be provided with an axially extending second mounting hole 41, and the first mounting hole 351 and the second mounting hole 41 may be connected by a fastener 70 to realize the connection between the first outer wall 31 and the second support portion 40.

[0083] Here, optionally, 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 side wall 31 and the second support portion 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).

[0084] It is understandable that the first outer side wall 31 and the inner side wall of the second support portion 40 may be connected by both interference fit and fastener 70 , which is not limited in the present disclosure.

[0085] In order to prevent the damping fluid in the cavity 10 from deteriorating or settling, Figure 2 , Figure 3 , Figure 5 , Figure 7 and Fig. 9As shown, the support member 100 may also be provided with a liquid inlet 81 and a liquid outlet 82 connected to the cavity 10. The damping liquid can be discharged from the cavity 10 through the liquid outlet 82, and new damping liquid can be injected into the cavity 10 through the liquid inlet 81, so as to avoid replacing the damping liquid in the cavity 10, and avoid deterioration or precipitation of the damping liquid in the cavity 10, which affects the vibration reduction effect on the rotating shaft 210.

[0086] The present disclosure does not limit the type of the damping fluid. Optionally, the damping fluid may be lubricating oil.

[0087] In order to facilitate the replacement of the damping fluid in the cavity 10, as an implementation method, Figure 2 , Figure 3 , Figure 5 , Figure 7 and Fig. 9 As shown, the liquid inlet 81 can be communicated with the oil inlet channel 241 of the lubricating oil on the motor 200, and the liquid outlet 82 can be communicated with the oil outlet channel 242 of the lubricating oil on the motor 200. In other words, the cavity 10 can be communicated with the lubricating oil circulation system of the motor 200, so as to facilitate the replacement of the damping liquid in the cavity 10.

[0088] The present disclosure does not limit the arrangement of the lubricating oil inlet channel 241 and the lubricating oil outlet channel 242. Optionally, as Figure 2 and Figure 3 As shown, the oil inlet channel 241 of the lubricating oil 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 port 81, and / or, the oil outlet channel 242 of the lubricating oil 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 port 82, and the other end of the oil outlet channel section 2421 extending to the inner side wall of the housing 220 of the motor 200. In this way, the lubricating oil may circulate into the cavity 10 via the oil inlet channel section 2411 and the liquid inlet port 81, and the lubricating oil circulated out of the cavity 10 may enter the interior of the housing 220 of the motor 200 via the liquid outlet port 82 and the oil outlet channel section 2421 to lubricate other components of the motor 200.

[0089] 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 may both be disposed on the first supporting portion 30 .

[0090] Alternatively, if Figure 8 As shown, the liquid inlet 81 can be disposed on the second supporting portion 40 , and the liquid outlet 82 can be disposed on the first supporting portion 30 .

[0091] 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 .

[0092] In the present disclosure, the support member 100 can be connected to any suitable position of the housing 220, and the present disclosure does not limit this. As an implementation mode, Figure 2 and Figure 3 As shown, the housing 220 may include a motor end cover 221 , and a mounting groove 2211 may be provided on the inner side of the motor end cover 221 . Along the radial direction of the rotating shaft 210 , the side of the support member 100 away from the rotating shaft 210 abuts against the groove wall of the mounting groove 2211 .

[0093] Furthermore, the support member 100 can be assembled with the motor end cover 221 in any suitable manner, which is not limited in the present disclosure. Optionally, the second support portion 40 can be first assembled with the housing 220 by heat sleeve or precasting (such as assembling the second support portion 40 into the mounting groove 2211 of the motor end cover 221 by heat sleeve or precasting), and then the second sealing ring 51 can be assembled to the first support portion 30. Finally, the first support portion 30 and the second sealing ring 51 can be hot-pressed into the second support portion 40 together to complete the assembly of the support member 100 and the housing 220.

[0094] 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.

[0095] 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 rotating shaft 210 of the motor 200. The rotating 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.

[0096] like Figure 1As 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.

[0097] 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 .

[0098] 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.

[0099] 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.

[0100] 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 adapted to be supported on the outer peripheral side of the rotating shaft, and a cavity is provided inside the support member, and the cavity is adapted to contain the damping fluid; The volume of the cavity can change when the rotating shaft abuts against the support member.

2. The support member according to claim 1, characterized in that The support member includes a first support portion and a second support portion, the first support portion is connected to or integrally formed with the second support portion, the cavity is arranged between the first support portion and the second support portion, and at least part of the first support portion and at least part of the second support portion can move relative to each other when the rotating shaft is pressed against the top, so that the volume of the cavity changes.

3. The support member according to claim 2, characterized in that The first support portion is suitable for being arranged on a side of the cavity close to the rotating shaft, and the second support portion is suitable for being arranged on a side of the cavity away from the rotating shaft. The first support portion is provided with an elastic deformation portion, and the elastic deformation portion can be deformed when the rotating shaft abuts against it, so that the volume of the cavity changes.

4. The support member according to claim 3, characterized in that The first supporting portion and the second supporting portion are both annular supporting portions, and the elastic deformation portion of the first supporting portion is adapted to be located radially inside the second supporting portion.

5. The support member according to claim 4, characterized in that The outer side wall of the first support portion includes a first outer side wall and a second outer side wall, the first outer side wall and the second outer side wall are arranged along the axial direction of the first support portion, and the second outer side wall is located radially inside the first outer side wall; The first outer wall is sealed and connected to the second support portion. The second outer wall and the second support portion are radially spaced apart. The cavity is located between the second outer wall and the second support portion. The elastic deformation portion includes a portion corresponding to the second outer wall.

6. The support member according to claim 5, characterized in that The radial spacing between the second outer wall and the inner wall of the second support portion is a first size, the diameter of the annular surface where the first outer wall is located is a second size, and the first size is 1‰ to 5‰ of the second size.

7. The support member according to claim 5, characterized in that The first supporting portion further includes a first annular protrusion, and the first annular protrusion is provided at an end of the second outer side wall away from the first outer side wall; The support member further includes a first sealing ring, which is suitable for being arranged between the outer peripheral wall of the first annular protrusion and the housing of the motor.

8. The support member according to claim 7, characterized in that A first annular mounting groove is provided on an outer peripheral wall of the first annular protrusion. The first sealing ring is installed in the first annular mounting groove and has a portion protruding from the first annular mounting groove.

9. The support member according to claim 5, characterized in that The support member further includes a second sealing ring, which is arranged between the second outer side wall and the inner side wall of the second support portion; The second sealing ring, the first supporting portion and the second supporting portion enclose the cavity.

10. The support member according to claim 9, characterized in that The second outer side wall and / or the inner side wall of the second supporting portion is provided with a second annular mounting groove, and the second sealing ring is installed in the second annular mounting groove and has a portion protruding from the second annular mounting groove.

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

12. The support member according to claim 5, characterized in that The first outer side wall is interference-fitted with the inner side wall of the second supporting portion.

13. The support member according to claim 5, characterized in that The first supporting portion further includes a second annular protrusion, and the second annular protrusion is provided at an end of the first outer side wall away from the second outer side wall; The support member further includes a fastener for connecting the second annular protrusion to the second support portion.

14. The support member according to any one of claims 1 to 13, characterized in that The support member is also provided with a liquid inlet and a liquid outlet communicated with the cavity.

15. The support member according to claim 14, characterized in that The liquid inlet is suitable for communicating with the oil inlet channel of the lubricating oil on the motor, the liquid outlet is suitable for communicating with the oil outlet channel of the lubricating oil on the motor, and the damping liquid is lubricating oil.

16. A motor, characterized in that: comprising a rotating shaft, a housing, and a support member according to any one of claims 1 to 15; The support member is supported between the outer peripheral side of the rotation shaft and the housing.

17. An electric drive system, characterized in that: Comprising the motor according to claim 16.

18. The electric drive system according to claim 17, characterized in that: The electric drive system further includes a reducer, wherein an input shaft of the reducer is connected to the rotating shaft of the motor.

19. A vehicle, characterized in that: include: The electric drive system according to claim 17 or 18; or The motor according to claim 16.

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