Motor, suspension and vehicle

Abstract

The utility model relates to a motor, a suspension and a vehicle, the motor comprises a first assembly, the first assembly comprises a casing and a first bearing, the first bearing is embedded in the casing, so that the first bearing is limited by the casing and is not easy to break away from a bearing installation position, and the technical problem that the first bearing has a risk of breaking away from the bearing installation position in the prior art is relieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicles, in particular to a motor, a suspension and a vehicle. BACKGROUND

[0002] In the existing motor, the first bearing has no axial and circumferential bearing limiting structure, the first bearing will move together with the piston rod, which causes the risk of the first bearing being separated from the bearing installation position, affecting the service life of the motor and even damaging the motor; meanwhile, the first bearing and the motor housing are two independent parts, the first bearing is installed in the motor housing, the dimensional tolerance and geometric tolerance of the bearing cannot be guaranteed, which will increase the friction of the piston rod movement and reduce the efficiency of the motor.

[0003] In combination with the characteristics of the related art, it is deduced that the existing technology has the technical problem of the risk of the first bearing being separated from the bearing installation position. SUMMARY

[0004] The motor, the suspension and the vehicle provided by the embodiments of the present application embed the first bearing in the motor housing to at least partially solve the above technical problems.

[0005] In order to achieve the above-mentioned purpose, according to the first aspect of the present application, a motor is provided, comprising a first assembly, the first assembly comprising:

[0006] a motor housing; and

[0007] a first bearing;

[0008] wherein the first bearing is embedded in the motor housing.

[0009] Optionally, the first bearing is provided with a first groove, the motor housing is provided with a first protrusion, and the first protrusion is embedded in the first groove.

[0010] Optionally, the motor housing is adapted to be obtained by curing molding in a mold, and the first bearing is pre-placed in a cavity of the mold.

[0011] Optionally, the curing molding is metal casting.

[0012] Optionally, the first bearing is provided with one of a first groove and a first protrusion, the motor housing is provided with the other one of the first groove and the first protrusion, and the first protrusion is embedded in the first groove.

[0013] Optionally, one of the first groove and the first protrusion extends along the circumference of the first bearing and is arranged on the outer side surface of the first bearing.

[0014] Optionally, the first bearing is provided with one of at least one second groove and at least one second protrusion, and the machine shell is provided with the other of at least one second groove and at least one second protrusion, each of the second protrusions being embedded in the corresponding second groove.

[0015] Optionally, one of the second groove and the second protrusion extends along the axial direction of the first bearing and is arranged on the outer side of the first bearing.

[0016] Optionally, the at least one second groove includes a plurality of second grooves which are distributed along the circumferential direction of the first bearing, or the at least one second protrusion includes a plurality of second protrusions which are distributed along the circumferential direction of the first bearing.

[0017] Optionally, the first bearing is provided with a first groove and at least one second groove for embedding the machine shell, wherein the first groove and the at least one second groove are in communication with each other.

[0018] Optionally, the machine shell is provided with a first protrusion embedded in the first groove and at least one second protrusion, each of the second protrusions being embedded in the corresponding second groove, wherein the first protrusion and the at least one second protrusion are connected with each other and integrally formed.

[0019] Optionally, the first bearing is provided with a first groove extending along the circumferential direction of the first bearing and at least one second groove, each of the second grooves extending along the axial direction of the first bearing, wherein the width of the second groove is greater than the width of the first groove in the axial direction of the first bearing.

[0020] Optionally, the inner side of the first bearing is provided with a plurality of lubricating members, and the motor further comprises a second assembly including a second shaft, the second shaft being mounted to the first bearing to enable relative movement between the first bearing and the second shaft, wherein the plurality of lubricating members are adapted to abut against the second shaft.

[0021] Optionally, the lubricating members are graphite columns.

[0022] Optionally, the first bearing is provided with a plurality of mounting holes penetrating the inner side of the first bearing, and the plurality of mounting holes are used for mounting the lubricating members.

[0023] Optionally, the first bearing is provided with a first groove for embedding the machine shell, wherein the mounting holes are in communication with the first groove.

[0024] Optionally, the first bearing is provided with at least one second groove for embedding the machine shell, wherein the mounting holes are in communication with the at least one second groove.

[0025] Optionally, the first bearing is a graphite copper bearing.

[0026] Optionally, the motor further comprises a second assembly, the second assembly comprising a second shaft, the second shaft being mounted to the first bearing to allow relative movement between the first bearing and the second shaft, wherein the first bearing is sleeved outside the second shaft.

[0027] Optionally, the first assembly further comprises a first shaft, and the motor further comprises a second assembly, the second assembly comprising a second shaft, the second shaft being adapted to be mounted to the first shaft and the first bearing to allow relative movement between the first bearing, the first shaft and the second shaft, wherein the first bearing and the first shaft are coaxially arranged.

[0028] Optionally, the coaxiality of the first bearing and the first shaft is in the range of 0-0.015mm.

[0029] According to a second aspect of the present application, a suspension is provided, comprising the motor according to any one of the above embodiments.

[0030] According to a third aspect of the present application, a vehicle is further provided, comprising the motor according to any one of the above embodiments, or comprising the suspension according to the above embodiments.

[0031] In the motor according to the embodiments of the present application, the first bearing is embedded in the casing, so that the first bearing is limited by the casing and is not easy to be disengaged from the bearing mounting position.

[0032] Other features and advantages of the present application will be illustrated in the following detailed description of the embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the description of the embodiments. Obviously, the drawings in the following description are only some of the embodiments of the present application, and other drawings can also be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0034] In order to more completely understand the present application and its advantages, the following will be described in conjunction with the drawings, wherein the same reference numerals in the following description represent the same parts.

[0035] Figure 1 is a structural schematic diagram of a motor provided in an exemplary embodiment of the present disclosure;

[0036] Figure 2 is a structural schematic diagram of a motor provided in an exemplary embodiment of the present disclosure; Figure 1A cross-sectional view of a cross section at A-A;

[0037] Figure 3 is an exploded view of the motor provided in the exemplary embodiment of the present disclosure; Figure 2 is an enlarged view of a specific region in

[0038] Figure 4 is an exploded view of the motor provided in the exemplary embodiment of the present disclosure;

[0039] Figure 5 is a structural view of the first bearing in the motor provided in the exemplary embodiment of the present disclosure;

[0040] Figure 6 is a top view of the first bearing in the motor provided in the exemplary embodiment of the present disclosure;

[0041] Figure 7 is a structural view of the motor case in the motor provided in the exemplary embodiment of the present disclosure.

[0042] BRIEF DESCRIPTION OF DRAWINGS

[0043] 1. Motor;

[0044] 2. First bearing; 21. First groove; 22. Second groove;

[0045] 3. Motor case; 31. First protrusion; 32. Second protrusion;

[0046] 4. Lubricating member; 5. First assembly; 51. First mandrel; 6. Second assembly; 61. Second mandrel; 7. Mounting hole; 8. Second bearing; 9. Specific region. DETAILED DESCRIPTION

[0047] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0048] According to the first aspect of the present application, please refer to Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 , Figure 3 is an enlarged view of a specific region 9 in Figure 2 The motor 1 provided by the present disclosure includes a first assembly 5, the first assembly 5 includes a motor case 3 and a first bearing 2, and the first bearing 2 is embedded in the motor case 3.

[0049] It can be understood that the first bearing 2 is embedded in the casing 3 to prevent the first bearing 2 from falling off.

[0050] In the embodiment, the first bearing 2 is embedded in the casing 3 so that the first bearing 2 is limited by the casing 3 and is not easy to fall off the bearing mounting position, thereby solving the technical problem that the first bearing 2 in the prior art has the risk of falling off the bearing mounting position.

[0051] In an embodiment, the casing 3 is adapted to be formed by solidification in a mold, and the first bearing 2 is previously placed in a cavity of the mold.

[0052] It can be understood that the first bearing 2 is embedded in the casing 3 to prevent the first bearing 2 from falling off with the movement of the components in the motor 1.

[0053] In an embodiment, the solidification is metal casting.

[0054] It can be understood that the metal casting facilitates the integral forming of the first bearing 2 and the casing 3, so that the first bearing 2 is stably embedded in the casing 3, and the movement accuracy of the motor 1 is improved.

[0055] It can be understood that the casing 3 is formed by metal casting to be embedded with the first bearing 2, so that the assembly of the first bearing 2 and the casing 3 is not needed, the process is simplified, and the cost is reduced.

[0056] In an embodiment, referring to Figure 4 and Figure 5 , the first bearing 2 is provided with a first groove 21, and the casing 3 is provided with a first protrusion 31, and the first protrusion 31 is embedded in the first groove 21.

[0057] It can be understood that the first bearing 2 and the casing 3 are clamped by the first protrusion 31 and the first groove 21, the first bearing 2 is axially limited by the first protrusion 31 and the first groove 21, the bonding strength between the casing 3 and the first bearing 2 is improved, and the first bearing 2 is prevented from falling off.

[0058] In other embodiments, the first groove 21 can be arranged on the casing 3, and the first protrusion 31 can be arranged on the first bearing 2.

[0059] In an embodiment, referring to Figure 4 and Figure 5 , the first groove 21 extends along the circumference of the first bearing 2 and is arranged on the outer side surface of the first bearing 2.

[0060] In the embodiment, the first groove 21 is arranged in a spaced manner between adjacent two first grooves 21.

[0061] In the embodiment, the first protrusion 31 extends along the circumference and is clamped with the first groove 21.

[0062] The first groove 21 is provided with a first axial limiting surface and a second axial limiting surface.

[0063] The first protrusion 31 is formed with a third axial limiting surface corresponding to the first axial limiting surface and a fourth axial limiting surface corresponding to the second axial limiting surface.

[0064] It can be understood that the first axial limiting surface abuts against the third axial limiting surface, and the second axial limiting surface abuts against the fourth axial limiting surface, so as to realize axial limiting of the first bearing 2 by the casing 3.

[0065] In an embodiment, referring to Figure 4 、 Figure 5 、 Figure 6 The first bearing 2 is provided with at least one second groove 22, and the casing 3 is provided with at least one second protrusion 32. Each second protrusion 32 is embedded in the corresponding second groove 22.

[0066] It can be understood that the first bearing 2 and the casing 3 are further clamped by the second protrusion 32 and the second groove 22, and the circumferential limiting of the first bearing 2 is realized by the clamping of the second protrusion 32 and the second groove 22, which further improves the bonding strength between the casing 3 and the first bearing 2 and prevents the first bearing 2 from falling off.

[0067] In other embodiments, the second groove 22 can be arranged on the casing 3, and the second protrusion 32 can be arranged on the first bearing 2.

[0068] In an embodiment, referring to Figure 4 、 Figure 5 、 Figure 6 Each second groove 22 extends along the axial direction of the first bearing 2 and is arranged on the outer side surface of the first bearing 2.

[0069] The two adjacent second grooves 22 are arranged in a spaced manner.

[0070] The second protrusion 32 extends along the axial direction and is clamped with the second groove 22.

[0071] The second groove 22 is provided with a first circumferential limiting surface and a second circumferential limiting surface.

[0072] The second protrusion 32 is formed with a third circumferential limiting surface corresponding to the first circumferential limiting surface and a fourth circumferential limiting surface corresponding to the second circumferential limiting surface.

[0073] It can be understood that the first circumferential limiting surface abuts against the third circumferential limiting surface, and the second circumferential limiting surface abuts against the fourth circumferential limiting surface, so as to realize circumferential limiting of the first bearing 2 by the casing 3.

[0074] In an embodiment, please refer to Figure 5 and Figure 6 The at least one second groove 22 comprises a plurality of second grooves 22, which are distributed along the circumference of the first bearing 2.

[0075] The plurality of second grooves 22 are respectively engaged with the plurality of second protrusions 32 on the casing 3.

[0076] It can be understood that the plurality of second grooves 22 are respectively engaged with the plurality of second protrusions 32 to prevent the first bearing 2 from falling off in the axial direction.

[0077] In an embodiment, please refer to Figure 4 and Figure 5 The first bearing 2 is provided with the first groove 21 and the at least one second groove 22, which are embedded with the casing 3; wherein the first groove 21 and the at least one second groove 22 are in communication with each other.

[0078] It can be understood that the first groove 21 and the at least one second groove 22 are in communication with each other, which effectively utilizes the area of the outer circumference of the first bearing 2 and increases the abutting area between the first bearing 2 and the casing 3 for axial limiting and circumferential limiting.

[0079] In an embodiment, please refer to Figure 4 and Figure 7 The casing 3 is provided with the first protrusion 31 and the at least one second protrusion 32, the first protrusion 31 is embedded in the first groove 21, and each second protrusion 32 is embedded in the corresponding second groove 22; wherein the first protrusion 31 and the at least one second protrusion 32 are connected with each other and integrally formed.

[0080] It can be understood that the first protrusion 31 and the second protrusion 32 can be prepared by the same process, and the first protrusion 31 and the second protrusion 32 can be prepared by the same material, thereby reducing the cost.

[0081] In an embodiment, please refer to Figure 5 and Figure 6 The first bearing 2 is provided with the first groove 21 and the at least one second groove 22, the first groove 21 extends along the circumference of the first bearing 2, and each second groove 22 extends along the axial direction of the first bearing 2; wherein in the axial direction of the first bearing 2, the width of the second groove 22 is greater than the width of the first groove 21.

[0082] It can be understood that the width of the second groove 22 in the axial direction is greater than the width of the first groove 21 in the axial direction, which is used to form the first circumferential limiting surface and the second circumferential limiting surface on the two sides of the circumference of the second groove 22, respectively, to limit the first bearing 2 in the circumferential direction.

[0083] In an embodiment, referring to Figure 5 and Figure 6 the inner side of the first bearing 2 is provided with a plurality of lubricating members 4; the motor 1 further comprises a second assembly 6, the second assembly 6 comprising a second mandrel 61 mounted to the first bearing 2 to allow relative movement between the first bearing 2 and the second mandrel 61; wherein the plurality of lubricating members 4 are adapted to abut against the second mandrel 61.

[0084] It can be understood that the lubricating surface of the lubricating member 4 abuts against the second mandrel 61, thereby reducing the friction of the contact between the second mandrel 61 and the first bearing 2, and facilitating the axial movement of the first bearing 2 relative to the second mandrel 61.

[0085] In an embodiment, the lubricating member 4 is a graphite column.

[0086] It can be understood that the graphite column has the characteristics of strong self-lubricating property, wear resistance, and high temperature resistance, which can prolong the service life of the lubricating member 4 and the first bearing 2.

[0087] In an embodiment, referring to Figure 5 and Figure 6 the first bearing 2 is provided with a plurality of mounting holes 7 penetrating the inner side of the first bearing 2, and the plurality of mounting holes 7 are used to mount the lubricating member 4.

[0088] wherein the mounting hole 7 can be a circular hole.

[0089] wherein the plurality of mounting holes 7 can be uniformly arranged on the inner side of the first bearing 2.

[0090] wherein the mounting hole 7 can penetrate the inner side of the first bearing 2, and the lubricating member 4 passes through the mounting hole 7 to achieve fixation with the first bearing 2.

[0091] It can be understood that by forming a plurality of mounting holes 7 on the inner side of the first bearing 2, it is beneficial to fix the lubricating member 4 and enhance the stability of the installation between the lubricating member 4 and the first bearing 2.

[0092] In an embodiment, referring to Figure 4 and Figure 5 the first bearing 2 is provided with a first recess 21 for embedding the casing 3, wherein the mounting hole 7 communicates with the first recess 21.

[0093] It can be understood that the mounting hole 7 communicates with the first recess 21, and in the process, the first recess 21 and the mounting hole 7 can be prepared by one process, thereby simplifying the process and reducing the cost.

[0094] In an embodiment, the first bearing 2 is provided with at least one second recess 22 for embedding the casing 3, wherein the mounting hole 7 communicates with the at least one second recess 22.

[0095] It can be understood that the mounting hole 7 is communicated with the second groove 22, and the second groove 22 and the mounting hole 7 can be manufactured by one process, so as to simplify the process and reduce the cost.

[0096] It should be noted that when the first groove 21 is communicated with the second groove 22, the groove, the second groove 22 and the mounting hole 7 can be manufactured by one process, further simplifying the process.

[0097] In an embodiment, the first bearing 2 is a graphite copper bearing.

[0098] It can be understood that the graphite copper bearing has self-lubricating property, that is, it can maintain high lubricating performance even in the absence of external lubrication, reducing its own friction and wear.

[0099] In an embodiment, referring to Figure 1 、 Figure 2 、 Figure 3 , the motor 1 further comprises a second assembly 6, the second assembly 6 comprising a second shaft 61, the second shaft 61 being mounted to the first bearing 2 to enable relative movement between the first bearing 2 and the second shaft 61, wherein the first bearing 2 is sleeved on the outside of the second shaft 61.

[0100] In an embodiment, the second assembly 6 can be a stator assembly, and the second shaft 61 can be a stator shaft.

[0101] It can be understood that the first bearing 2 is sleeved on the outer circumferential side of the second shaft 61, and can move along the axial direction of the second shaft 61 with the motor housing 3, so as to realize the relative movement between the first bearing 2 and the second shaft 61.

[0102] In an embodiment, referring to Figure 1 、 Figure 2 、 Figure 3 , the first assembly 5 further comprises a first shaft 51; the motor 1 further comprises a second assembly 6, the second assembly 6 comprising a second shaft 61, the second shaft 61 being adapted to be mounted to the first shaft 51 and the first bearing 2 to enable relative movement between the first bearing 2 and the first shaft 51 and the second shaft 61, wherein the first bearing 2 and the first shaft 51 are coaxially arranged.

[0103] In an embodiment, the first assembly 5 can be a rotor assembly, and the first shaft 51 can be a rotor shaft.

[0104] It can be understood that the first shaft 51 and the first bearing 2 are matched with the second shaft 61, and the first bearing 2 and the first shaft 51 are coaxially arranged, so as to improve the coaxiality of the first bearing 2 and the first shaft 51.

[0105] In an embodiment, referring to Figure 1 、 Figure 2 ,Figure 3 The coaxiality of the first bearing 2 and the first core shaft 51 ranges from 0 to 0.015 mm.

[0106] It can be understood that the first bearing 2 is combined with the shell 3 into an integral part, so that the first bearing 2 and the shell 3 are both formed with a plurality of axial limiting surfaces and circumferential limiting surfaces, the first bearing 2 is embedded in the shell 3, and the shell 3 is used to limit the first bearing 2 in the axial and circumferential directions.

[0107] It can be understood that the first bearing 2 and the shell 3 can be machined together, and the first bearing 2 is pressed into the shell 3, so as to avoid the mechanical manufacturing error caused by the secondary assembly of the first bearing 2, so that the coaxiality of the first bearing 2 can be reduced to below 0.015 mm, the motion accuracy of the motor 1 can be effectively improved, the centration of the mover assembly during motion is ensured, the thrust and pull of the motor 1 are stably output, and the service life of the motor 1 parts and the overall structure is improved.

[0108] In an embodiment, referring to Figure 1 , Figure 2 , Figure 3 , the motor 1 further comprises a second bearing 8, and the second bearing 8 is sleeved on the lower end of the stator core shaft.

[0109] The second bearing 8 can be a graphite copper bearing.

[0110] It can be understood that the second bearing 8 is interference fitted on the outer circumferential side of the stator core shaft, so as to avoid the second bearing 8 from falling off.

[0111] According to a second aspect of the present disclosure, a suspension is provided, comprising the motor 1 of any of the above embodiments.

[0112] According to a third aspect of the present disclosure, a vehicle is provided, comprising the motor 1 or the suspension of any of the above embodiments, which has all the beneficial effects of the motor 1 or the suspension of any of the above embodiments, and the present disclosure will not be repeated here.

[0113] The vehicle can be a fuel vehicle, a plug-in hybrid vehicle, or a new energy vehicle, etc., and the present disclosure does not make specific limitations thereon.

[0114] In the description of the present application, the terms “first” and “second” are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with “first” and “second” can explicitly or implicitly include one or more features. In the description of the present application, the meaning of “a plurality of” is two or more, unless otherwise specifically limited.

[0115] In the above embodiments, the description of each embodiment has its own focus, and the parts not described in detail in a certain embodiment can be referred to the relevant description of other embodiments.

[0116] The embodiments, implementation manners and related technical features of the present application can be combined or replaced with each other without conflict.

[0117] The above are only the preferred embodiments of the present application, and do not limit the present application in any form. Any simple modification, equivalent change and modification made to the above embodiments without departing from the technical solution content of the present application and in accordance with the technical essence of the present application still belongs to the scope of the technical solution of the present application.

Claims

1. An electric machine (1), characterized in that The first assembly (5) comprises: a housing (3); and a first bearing (2); wherein the first bearing (2) is embedded in the housing (3).

2. The electric machine (1) according to claim 1, characterized in that The housing (3) is adapted to be formed by solidification in a mold, and the first bearing (2) is previously placed in a cavity of the mold.

3. The electric machine (1) according to claim 2, characterized in that The solidification is metal casting.

4. The electric machine (1) according to claim 1, characterized in that The first bearing (2) is provided with one of a first groove (21) and a first protrusion (31), and the housing (3) is provided with the other of the first groove (21) and the first protrusion (31), and the first protrusion (31) is embedded in the first groove (21).

5. The electric machine (1) according to claim 4, characterized in that One of the first groove (21) and the first protrusion (31) extends along a circumferential direction of the first bearing (2) and is arranged on an outer side of the first bearing (2).

6. The electric machine (1) according to claim 1, characterized in that The first bearing (2) is provided with one of at least one second groove (22) and at least one second protrusion (32), and the housing (3) is provided with the other of the at least one second groove (22) and the at least one second protrusion (32), and each second protrusion (32) is embedded in a corresponding second groove (22).

7. The electric machine (1) according to claim 6, characterized in that One of the second groove (22) and the second protrusion (32) extends along an axial direction of the first bearing (2) and is arranged on an outer side of the first bearing (2).

8. The electric machine (1) according to claim 6, characterized in that The at least one second groove (22) comprises a plurality of second grooves (22) distributed along a circumferential direction of the first bearing (2); or the at least one second protrusion (32) comprises a plurality of second protrusions (32) distributed along a circumferential direction of the first bearing (2).

9. The electric machine (1) according to claim 1, characterized in that The first bearing (2) is provided with a first groove (21) and at least one second groove (22) for embedding the housing (3); wherein the first groove (21) and the at least one second groove (22) are in communication with each other.

10. The electric machine (1) according to claim 8, characterized in that The housing (3) is provided with a first protrusion (31) embedded in the first groove (21) and at least one second protrusion (32) embedded in a corresponding second groove (22); wherein the first protrusion (31) and the at least one second protrusion (32) are connected with each other and integrally formed.

11. The electric machine (1) according to claim 1, characterized in that The first bearing (2) is provided with a first groove (21) extending along a circumferential direction of the first bearing (2) and at least one second groove (22) extending along an axial direction of the first bearing (2); wherein, in the axial direction of the first bearing (2), a width of the second groove (22) is greater than a width of the first groove (21).

12. The electric machine (1) according to claim 1, characterized in that The inner side of the first bearing (2) is provided with a plurality of lubricating members (4); the motor (1) further comprises a second assembly (6), the second assembly (6) comprising a second shaft (61), the second shaft (61) being mounted on the first bearing (2) to enable relative movement between the first bearing (2) and the second shaft (61); wherein the plurality of lubricating members (4) are adapted to abut against the second shaft (61).

13. The electric machine (1) according to claim 12, characterized in that The lubricating member (4) is a graphite column.

14. The electric machine (1) according to claim 12, characterized in that The first bearing (2) is provided with a plurality of mounting holes (7) penetrating the inner side of the first bearing (2), the plurality of mounting holes (7) being used for mounting the lubricating member (4).

15. The electric machine (1) according to claim 14, characterized in that The first bearing (2) is provided with a first groove (21) for embedding the casing (3), wherein the mounting hole (7) communicates with the first groove (21).

16. The electric machine (1) according to claim 14, characterized in that The first bearing (2) is provided with at least one second groove (22) for embedding the casing (3), wherein the mounting hole (7) communicates with the at least one second groove (22).

17. The electric machine (1) according to claim 1, characterized in that The first bearing (2) is a graphite copper bearing.

18. The electric machine (1) according to claim 1, characterized in that The motor (1) further comprises a second assembly (6), the second assembly (6) comprising a second shaft (61), the second shaft (61) being mounted on the first bearing (2) to enable relative movement between the first bearing (2) and the second shaft (61), wherein the first bearing (2) is sleeved on the outer side of the second shaft (61).

19. The electric machine (1) according to claim 1, characterized in that The first assembly (5) further comprises a first shaft (51); the motor (1) further comprises a second assembly (6), the second assembly (6) comprising a second shaft (61), the second shaft (61) being adapted to be mounted on the first shaft (51) and the first bearing (2) to enable relative movement between the first bearing (2) and the first shaft (51) and the second shaft (61), wherein the first bearing (2) and the first shaft (51) are coaxially arranged.

20. The electric machine (1) according to claim 19, characterized in that The coaxiality of the first bearing (2) and the first shaft (51) ranges from 0 to 0.015 mm.

21. A suspension characterized by, The motor (1) as claimed in any one of claims 1 to 20.

22. A vehicle characterized by The motor (1) as claimed in any one of claims 1 to 20, or the suspension as claimed in claim 21.

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