Bearing assembly structure, motor and automobile

Abstract

The invention provides a bearing assembly structure, a motor and an automobile, the bearing assembly structure comprises a first bearing chamber, a first bearing, a first sheath and a rotating shaft, the first bearing is provided with a first outer ring and a first inner ring, the first inner ring can rotate relative to the first outer ring, and the first inner ring is fixedly sleeved on the rotating shaft; the first sheath is arranged between the side wall of the first bearing chamber and the first bearing in a sleeving manner, and the first sheath is fixedly connected with the first outer ring; and the first sheath is provided with a bearing pulling plate part, the first sheath and the first bearing chamber are kept relatively fixed, and the outer ring is propped against the bottom surface of the first bearing chamber by the first sheath along the axial direction of the motor through the bearing pulling plate part. According to the technical scheme, impact on the bearing pulling plate can be reduced, and abnormal sound and faults of the motor are reduced. In addition, according to the technical scheme, bearing ring running caused by rotation of the first outer ring can be prevented.

Description

Technical Field

[0001] The invention belongs to the technical field of automobile motors, and in particular relates to a bearing assembly structure, a motor and an automobile. Background Art

[0002] At present, most automobile drive motors are permanent magnet synchronous motors, which have high power density and high speed, and are the current mainstream trend. The motor is generally an inner rotor structure, such as Figure 1 As shown, the rotor sleeve is arranged on the rotating shaft 4', and the rotating shaft 4' is provided with bearings 1' at the front and rear ends. The bearing 1' and the side wall of the bearing chamber 2' are clearance-fitted, so there is a small gap between the two. Due to the high-speed rotation of the rotor, during the long-term operation of the motor, the inner ring 12' of the bearing will drive the outer ring 11' of the bearing to rotate, causing friction between the outer ring 11' of the bearing and the side wall of the bearing chamber 2', which is called "bearing lap" in the industry. Bearing lap can cause damage to the bearing 1' and destroy the fitting relationship, thereby causing abnormal vibration or even damage to the motor. In terms of preventing bearing lap, the generally used method is to put a rubber ring, such as a bearing sleeve, on the outer ring 11' of the bearing and embed it in the bearing chamber 2'.

[0003] The road conditions in Chinese cities are relatively complex. In order to limit the impact on the motor rotor caused by the axial force generated by vehicle vibration and motor axial leakage resistance, large-scale automobile main drive motors often use bearing pull plates 3' to limit the axial movement of the motor rotor. However, due to the large mass of the drive motor rotor and the long-term operation of the motor, the impact force on the bearing pull plate 3' is relatively large, which causes problems such as abnormal noise and failure of the motor.

[0004] Among them, although the bearing sleeve used in the prior art can solve the problem of bearing running, the problem of impact on the bearing pull plate 3' causing abnormal noise and failure of the motor still exists, so it is necessary to solve this problem. Summary of the invention

[0005] Therefore, the present invention provides a bearing assembly structure, a motor and a car, the main technical problem to be solved is: how to reduce the impact on the bearing pull plate and reduce abnormal noise and failure of the motor.

[0006] In order to solve the above problems, the present invention provides a bearing assembly structure, which includes a first bearing chamber, a first bearing and a first sleeve, wherein the first bearing has a first outer ring and a first inner ring, and the first inner ring can rotate relative to the first outer ring;

[0007] Among them, the first sleeve is arranged between the side wall of the first bearing chamber and the first bearing, and the first sleeve is fixedly connected to the first outer ring; the first sleeve has a bearing pull plate portion, the first sleeve and the first bearing chamber are relatively fixed, and the first sleeve fixes the outer ring to the bottom surface of the first bearing chamber along the axial direction of the motor through the bearing pull plate portion.

[0008] In some embodiments, the bearing assembly structure further includes a first end cover and a fastener, and the first bearing chamber is disposed on the first end cover;

[0009] The fastener is used to be inserted into the first sleeve from the outside of the first end cover to fix the first sleeve so that the first sleeve and the first bearing chamber remain relatively fixed.

[0010] In some embodiments, the fastener is removable.

[0011] In some embodiments, the bearing pull plate portion is integrally formed on the first sleeve;

[0012] And / or, the bearing pull plate portion is arranged at one end of the sleeve and extends radially inwardly of the sleeve;

[0013] And / or, the first sheath and the first outer ring are interference fit, so that the first sheath and the first outer ring are fixedly connected;

[0014] And / or, the side wall of the first bearing chamber and the first sleeve are clearance-matched, and the two are kept relatively fixed in the circumferential direction.

[0015] In some embodiments, the first inner ring is interference fit with the rotating shaft, so that the first inner ring can be fixed to the rotating shaft.

[0016] In some embodiments, the bearing assembly structure further includes a second bearing, an elastic member, a rotating shaft, and a second sleeve; the second bearing and the first inner ring are both sleeved on the rotating shaft, and the second bearing is located on a side of the first bearing away from the bottom surface of the first bearing chamber; a stopper is provided on the rotating shaft, and the stopper abuts against a side of the second bearing close to the first bearing;

[0017] The second sleeve has the same structure as the first sleeve; the second sleeve is arranged on the radially outer side of the second bearing, and the bearing pull plate portion of the second sleeve is located on the side of the second bearing away from the stop portion; wherein the elastic member applies force to the second bearing by driving the bearing pull plate portion of the second sleeve, so that the second bearing pushes the rotating shaft through the stop portion, and the rotating shaft drives the first bearing to abut against the bottom surface of the first bearing chamber.

[0018] In some embodiments, the bearing assembly structure further includes a second bearing chamber for accommodating the second bearing;

[0019] The second sleeve is disposed between the side wall of the second bearing chamber and the second bearing, and the second sleeve is fixedly connected to the side wall of the second bearing chamber in the circumferential direction;

[0020] Among them, the second bearing has a second outer ring and a second inner ring, and the second inner ring can rotate relative to the second outer ring; the second bearing is mounted on the rotating shaft through the second inner ring, and the second inner ring is relatively fixed to the rotating shaft, and the second outer ring is circumferentially fixed to the second sleeve.

[0021] In some embodiments, the bearing assembly structure further includes a second end cover, and the second bearing chamber is a fixed sleeve disposed on the second end cover;

[0022] The second end cover has a first surface opposite to the bearing pull plate portion of the second sleeve, the bottom wall of the second bearing chamber is located between the bearing pull plate portion of the second sleeve and the first surface, and the bottom wall of the second bearing chamber has a through hole; the elastic member is located in the through hole and abuts between the bearing pull plate portion of the second sleeve and the first surface.

[0023] In some embodiments, the assembly structure formed by the first sleeve and the first bearing is a first assembly structure, the assembly structure formed by the second sleeve and the second bearing is a second assembly structure, and the first assembly structure and the second assembly structure are identical in structure.

[0024] The present invention also provides a motor, which comprises any one of the bearing assembly structures described above.

[0025] The present invention also provides a car, which includes any one of the bearing assembly structures described above or includes the motor described above.

[0026] The bearing assembly structure, motor and automobile provided by the present invention have the following beneficial effects:

[0027] 1. Since the first outer ring is fixedly connected to the first sleeve, when the motor rotor is impacted by the axial force generated by vehicle vibration and the axial leakage resistance of the motor, the locking force between the first outer ring and the first sleeve (when the first outer ring and the first sleeve are fixed with an interference fit, the locking force is the friction resistance between the first outer ring and the first sleeve) can reduce the axial movement of the first bearing, thereby reducing the impact of the first bearing on the bearing pull plate on the first sleeve, and further reducing the abnormal noise and failure of the motor caused by excessive impact on the bearing pull plate in the prior art, thereby reducing motor failure and reducing motor vibration noise.

[0028] 2. The present invention fixes the first outer ring by fixedly connecting the first outer ring to the first sleeve, thereby preventing the first outer ring from rotating and causing the bearing to run in circles.

[0029] 3. In the present invention, for the sleeve of the same structure, when it is installed on the outer side of the first bearing (the sleeve at this time is the first sleeve, and the bearing pull plate part of the first sleeve is located on the side of the first bearing away from the bottom surface of the first bearing chamber), it can prevent the first bearing from running in circles and limit the axial displacement of the first bearing; when it is installed on the outer side of the second bearing (the sleeve at this time is the second sleeve, and the bearing pull plate part of the second sleeve is located on the side of the second bearing close to the bottom surface of the second bearing chamber), it can protect the second bearing, reduce the axial load on the second bearing, and prevent the elastic member from directly contacting the second bearing and causing damage to the second bearing; in this way, the sleeve of the same structure can achieve different functions by adopting different assembly methods at different positions, which can greatly reduce the types of parts and components and reduce processing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. The drawings described below are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0031] Figure 1 is a schematic diagram of a bearing assembly structure of the prior art;

[0032] Figure 2 is a structural schematic diagram of a motor provided by an embodiment of the present invention;

[0033] Figure 3 yes Figure 2 The enlarged schematic diagram of point A in the middle;

[0034] Figure 4 yes Figure 2 The enlarged schematic diagram of point B in the middle;

[0035] Figure 5 is a schematic structural diagram of a first sheath provided by an embodiment of the present invention;

[0036] Figure 6 It is a schematic diagram of an assembly of a first sleeve and a first bearing provided by an embodiment of the present invention.

[0037] The accompanying drawings are marked as follows:

[0038] 1', bearing; 2', bearing chamber; 3', bearing pull plate; 4', rotating shaft; 11', outer ring; 12', inner ring; 1, rotating shaft; 2, rotor; 3, first bearing; 4, first bearing chamber; 5, first sleeve; 6, fastener; 7, first end cover; 8, second bearing; 9, second sleeve; 10, elastic member; 11, second bearing chamber; 12, second end cover; 31, first outer ring; 32, first inner ring; 41, side wall of first bearing chamber; 42 , the bottom surface of the first bearing chamber; 51, the bearing pull plate portion of the first sleeve; 52, the protrusion; 81, the second outer ring; 82, the second inner ring; 91, the bearing pull plate portion of the second sleeve; 101, the stop portion; 501, the threaded hole; 111, the side wall of the second bearing chamber; 112, the bottom wall of the second bearing chamber; 113, the through hole; 121, the first surface; 801, the side of the second bearing close to the first bearing; 802, the side of the second bearing away from the stop portion. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0041] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0042] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0043] See also Figure 2-6 As shown, according to an embodiment of the present invention, a bearing assembly structure is provided, which includes a first bearing chamber 4, a first bearing 3 and a first sleeve 5. The first bearing 3 has a first outer ring 31 and a first inner ring 32. The first inner ring 32 can rotate relative to the first outer ring 31. The first inner ring 32 is used to be sleeved on the rotating shaft 1, for example, the first inner ring 32 can be interference fit with the rotating shaft 1, so that the first inner ring 32 can be fixed to the rotating shaft 1. In some embodiments, the first bearing 3 can be a deep groove ball bearing, etc.

[0044] The first sleeve 5 is sleeved between the side wall 41 of the first bearing chamber and the first bearing 3. The first sleeve 5 is fixedly connected to the first outer ring 31, for example, the first sleeve 5 can be interference fit with the first outer ring 31, so that the first sleeve 5 is fixedly connected to the first outer ring 31. The first sleeve 5 has a bearing pull plate portion 51, and the first sleeve 5 and the first bearing chamber 4 are relatively fixed, and the first sleeve 5 fixes the first outer ring 31 on the bottom surface 42 of the first bearing chamber along the axial direction of the motor through its bearing pull plate portion 51.

[0045] In the above example, since the first sleeve 5 can fix the first outer ring 31 on the bottom surface 42 of the first bearing chamber along the axial direction of the motor through its bearing pull plate portion 51, the first sleeve 5 also has the function of a bearing pull plate to axially position the bearing. In addition, since the first sleeve 5 and the first bearing chamber 4 are relatively fixed, the first bearing chamber 4 is generally a fixed part, so that the first sleeve 5 is also a fixed part. Since the first outer ring 31 is fixedly connected to the first sleeve 5, when the motor rotor is impacted by the axial force generated by the vehicle vibration and the axial leakage resistance of the motor, the locking force between the first outer ring 31 and the first sleeve 5 (when the first outer ring 31 and the first sleeve 5 are fixed by interference fit, the locking force is the friction resistance between the first outer ring 31 and the first sleeve 5) can reduce the axial movement of the first bearing 3, thereby reducing the impact of the first bearing 3 on the bearing pull plate portion 51 on the first sleeve 5, and further reducing the abnormal noise and failure of the motor caused by excessive impact on the bearing pull plate in the prior art, thereby reducing motor failure and reducing motor vibration noise.

[0046] In addition, the present invention can fix the first outer ring 31 by fixedly connecting the first outer ring 31 to the first sleeve 5, thereby preventing the first outer ring 31 from rotating and causing the bearing to run in circles.

[0047] In order to achieve the aforementioned function of keeping the first sleeve 5 and the first bearing chamber 4 relatively fixed, in some embodiments, as Figure 3 As shown, the aforementioned bearing assembly structure may further include a first end cover 7 and a fastener 6. The aforementioned first bearing chamber 4 is arranged on the first end cover 7. It should be noted here that the first bearing chamber 4 is generally fixed on the first end cover 7. The fastener 6 is used to be inserted into the first sleeve 5 from the outside of the first end cover 7 to fix the first sleeve 5 so that the first sleeve 5 and the first bearing chamber 4 remain relatively fixed.

[0048] In the above example, the first sleeve 5 can be fixed by the fastener 6, so that the first sleeve 5 and the first bearing chamber 4 remain relatively fixed. In addition, since the fastener 6 is installed from the outside of the first end cover 7, it has the advantage of convenient assembly.

[0049] In some embodiments, the aforementioned fastener 6 is detachable, for example, the fastener 6 may be a screw, and the fastener 6 may be connected to the first sheath 5 by threaded connection. When the fastener 6 is damaged, the fastener 6 may be screwed out from the first end cap 7 and the first sheath 5.

[0050] In the above example, since the first sleeve 5 is mainly locked and fixed by the fastener 6, when the motor rotor 2 is impacted by the axial force generated by the vehicle vibration and the axial leakage resistance of the motor, the shaft 1 will apply a large axial impact force to the first sleeve 5 through the first bearing 3. The axial impact force will cause an axial impact on the fastener 6. After long-term use, the fastener 6 is easily damaged. By making the fastener 6 detachable and assembling the fastener 6 from the outside of the first end cover 7, it is convenient to replace the fastener 6.

[0051] In some embodiments, Figure 5 and Figure 6 As shown, when the aforementioned fastener 6 is a screw, the aforementioned first sheath 5 is provided with a threaded hole 501 , and the aforementioned first end cover 7 is provided with a screw through hole, and the screw is used to pass through the screw through hole and be threadedly connected in the threaded hole 501 .

[0052] It should be noted here that: in the existing scheme, the bearing pull plate is an independent component, which is only locked by screws, so when the screw fails, abnormal noise will occur, and during installation, glue is applied on the bearing pull plate to ensure airtightness, so when the screw fails, the bearing pull plate will be separated from the first end cover 7, and vibration and abnormal noise will occur as the motor works. When repairing, the motor needs to be opened and glued again, which is a complicated process. In the technical scheme of the present invention, in addition to the screws, the first sleeve 5 also cooperates with the first bearing chamber 4 and the first outer ring 31, reducing the probability of failure here, and only regular inspections are required. When the screw fails, only the screw needs to be replaced and tightened, without disassembling the motor, and the maintenance process is simplified.

[0053] In some embodiments, Figure 5 As shown, the aforementioned bearing pull plate portion 51 can be integrally formed on the first sleeve 5 to improve the connection stability between the bearing pull plate portion 51 and the first sleeve 5 .

[0054] In some embodiments, Figure 5 As shown, the aforementioned bearing pull plate portion 51 can be arranged at one end of the first sleeve 5 and extend radially inwardly of the first sleeve 5 to facilitate the bearing pull plate portion 51 to axially position the first bearing 3. The bearing pull plate portion 51 can be annular to improve the axial positioning effect of the bearing pull plate portion 51 on the first bearing 3.

[0055] In some embodiments, the side wall 41 of the first bearing chamber and the first sleeve 5 are clearance-matched, and the two are relatively fixed in the circumferential direction, for example, Figure 5As shown, one of the side wall 41 of the first bearing chamber and the first sleeve 5 may be provided with a protrusion 52 (the protrusion 52 may sometimes also be referred to as a positioning key), and the other may be provided with a groove, and the protrusion 52 is used to be inserted into the groove, so that the side wall 41 of the first bearing chamber and the first sleeve 5 are relatively fixed in the circumferential direction. The protrusion 52 may extend axially on the first sleeve 5.

[0056] In the above example, the side wall 41 of the first bearing chamber and the first sleeve 5 are clearance-matched, so that the installation of the first sleeve 5 is facilitated. In a specific application example, the protrusion 52 can be arranged on the outer wall of the first sleeve 5, for example, the protrusion 52 can be integrally formed on the outer wall of the first sleeve 5. The protrusion 52 can position the circumference of the first sleeve 5, so that the first sleeve 5 can provide stable support for the first outer ring 31 fixed thereon, and prevent the first outer ring 31 from running in circles due to the excessive rotation speed of the first inner ring 32.

[0057] It should be noted that in some embodiments, the protrusion 52 can be used as a reference to check whether the first sleeve 5 is properly assembled. Specifically, when the first sleeve 5 is assembled on the first bearing chamber 4, when the end surface of the protrusion 52 is aligned with the outer end surface of the first bearing chamber 4, it means that the first sleeve 5 is properly installed.

[0058] Among them, during assembly, the first sleeve 5 and the first bearing 3 can be assembled as a whole to form a first assembly structure, and then the first assembly structure can be installed in the first bearing chamber 4, so that the protrusion 52 on the first sleeve 5 is inserted into the groove on the side wall of the first bearing chamber 4; and then the first sleeve 5 and the first end cover 7 are matched and locked using screws.

[0059] It should be noted here that the number of threaded holes 501 on the first sleeve, the number and length of protrusions 52 on the first sleeve, and the size of the bearing pull plate portion 51 of the first sleeve can all be set according to actual conditions, and the details will not be repeated here.

[0060] In some embodiments, Figure 2 and Figure 4 As shown, the aforementioned bearing assembly structure may further include a second bearing 8, an elastic member 10, a rotating shaft 1, and a second sleeve 9. The second bearing 8 is sleeved on the rotating shaft 1, and the second bearing 8 is located on the side of the first bearing 3 that is away from the bottom surface 42 of the first bearing chamber. A stopper 101 is provided on the rotating shaft 1, and the stopper 101 abuts against a side 801 of the second bearing that is close to the first bearing. In some embodiments, the stopper 101 may be a shoulder provided on the rotating shaft 1.

[0061] The second sleeve 9 and the first sleeve 5 have the same structure. The second sleeve 9 is sleeved on the radial outer side of the second bearing 8, and the bearing pull plate portion 91 of the second sleeve is located on the side 802 of the second bearing away from the stop portion. Among them, the elastic member 10 can be a corrugated gasket, a spring or a flexible plastic. The elastic member 10 applies force to the second bearing 8 by driving the bearing pull plate portion 91 of the second sleeve, so that the second bearing 8 pushes the rotating shaft 1 through the stop portion 101, so that the rotating shaft 1 drives the first bearing 3 to abut against the bottom surface 42 of the first bearing chamber, thereby eliminating the axial installation clearance of the rotating shaft 1.

[0062] In the above example, since the first sheath 5 and the second sheath 9 have the same structure, the first sheath 5 and the second sheath 9 are the same sheaths, so that the first sheath 5 and the second sheath 9 can be interchanged to reduce the manufacturing cost. At the same time, in the present invention, for the sleeve of the same structure, when it is installed on the outer side of the first bearing 3 (the sleeve at this time is the aforementioned first sleeve 5, and the bearing pull plate portion 51 of the first sleeve is located on the side of the first bearing 3 away from the bottom surface 42 of the first bearing chamber), it can prevent the first bearing 3 from running in circles and limit the axial displacement of the first bearing 3; when it is installed on the outer side of the second bearing 8 (the sleeve at this time is the aforementioned second sleeve 9, and the bearing pull plate portion 91 of the second sleeve is located on the side of the second bearing 8 close to the bottom wall 112 of the second bearing chamber), it can protect the second bearing 8 and reduce the axial load on the second bearing 8, and prevent the elastic member 10 from directly contacting the second bearing 8 and causing damage to the second bearing 8; in this way, the sleeve of the same structure can achieve different functions by adopting different assembly methods at different positions, which can greatly reduce the types of parts and components and reduce processing costs.

[0063] In some embodiments, Figure 2 and Figure 4 As shown, the aforementioned bearing assembly structure may also include a second bearing chamber 11 for accommodating the second bearing 8. The second sleeve 9 is sleeved between the side wall 111 of the second bearing chamber and the second bearing 8, and the second sleeve 9 is circumferentially fixedly connected to the side wall 111 of the second bearing chamber. Among them, the second bearing 8 has a second outer ring 81 and a second inner ring 82, and the second inner ring 82 can rotate relative to the second outer ring 81. The second bearing 8 is sleeved on the rotating shaft 1 through the second inner ring 82. The second inner ring 82 remains relatively fixed with the rotating shaft 1, for example, the second inner ring 82 can be fixedly connected with the rotating shaft 1 by means of interference fit with the rotating shaft 1. The above-mentioned second outer ring 81 is circumferentially fixed with the second sleeve 9, for example, the second outer ring 81 can be interference fit with the second sleeve 9, and the above-mentioned second outer ring 81 is circumferentially fixed with the second sleeve 9.

[0064] In the above example, the second bearing chamber 11 is generally a fixed structure. Since the second sleeve 9 is circumferentially fixedly connected to the side wall 111 of the second bearing chamber, the second sleeve 9 can remain fixed in the circumferential direction, thereby providing stable support for the second outer ring 81 fixed thereon, preventing the second outer ring 81 from rotating and causing the second bearing 8 to run in circles.

[0065] In some embodiments, a protrusion may be provided on one of the side wall 111 of the second bearing chamber and the second sleeve 9, and a groove may be provided on the other, wherein the protrusion is inserted into the groove to keep the side wall 111 of the second bearing chamber and the second sleeve 9 relatively fixed in the circumferential direction.

[0066] It should be noted here that: in some embodiments, the end face of the second sleeve 9 can be used as a reference to check whether the second sleeve 9 is properly assembled. Specifically, when the second sleeve 9 is assembled to the second bearing chamber 11, when the end face of the second sleeve 9 is aligned with the outer end face of the second bearing chamber 11, it means that the second sleeve 9 is properly installed.

[0067] In some embodiments, Figure 2 and Figure 4 As shown, the aforementioned bearing assembly structure may further include a second end cover 12, and the aforementioned second bearing chamber 11 is a fixed sleeve arranged on the second end cover 12. The second end cover 12 has a first surface 121 opposite to the bearing pull plate portion 91 of the second sleeve, and the bottom wall 112 of the second bearing chamber is located between the bearing pull plate portion 91 of the second sleeve and the first surface 121. The bottom wall 112 of the second bearing chamber has a through hole 113. The elastic member 10 is located in the through hole 113 and abuts between the bearing pull plate portion 91 of the second sleeve and the first surface 121.

[0068] In the above example, by arranging the elastic member 10 in the through hole 113 on the bottom wall 112 of the second bearing chamber, the space in the bottom wall 112 of the second bearing chamber can be fully utilized, making the entire assembly structure more compact.

[0069] In some embodiments, the assembly structure formed by the aforementioned first sleeve 5 and the first bearing 3 is a first assembly structure. The assembly structure formed by the aforementioned second sleeve 9 and the second bearing 8 is a second assembly structure. Among them, the structures of the first assembly structure and the second assembly structure are the same, so that the first bearing 3 and the second bearing 8, as well as the first sleeve 5 and the second sleeve 9 are interchangeable, thereby reducing the processing and manufacturing costs of parts. In addition, the structures of the first assembly structure and the second assembly structure are the same, so that the first sleeve 5 and the first bearing 3, the second sleeve 9 and the second bearing 8 can be assembled in the same way, which can also reduce the assembly cost. Specifically, the assembly of the bearing and the sleeve can be completed first, and two groups can be assembled in the same way, and then assembled into the first bearing chamber 4 and the second bearing chamber 11 respectively.

[0070] The present invention also provides a motor, which may include any of the above bearing assembly structures. Among them, because the motor adopts the above bearing assembly structure, since the first outer ring 31 is fixedly connected to the first sleeve 5, when the motor rotor is impacted by the axial force generated by the vehicle vibration and the axial leakage resistance of the motor, the locking force between the first outer ring 31 and the first sleeve 5 (when the first outer ring 31 and the first sleeve 5 are fixed by interference fit, the locking force is the friction resistance between the first outer ring 31 and the first sleeve 5) can reduce the axial movement of the first bearing 3, thereby reducing the impact of the first bearing 3 on the bearing pull plate on the first sleeve 5, and further reducing the abnormal noise and failure of the motor caused by excessive impact on the bearing pull plate in the prior art.

[0071] The motor further comprises a rotor 2, which is sleeved on the aforementioned rotating shaft 1. When the aforementioned bearing assembly structure comprises both a first bearing 3 and a second bearing 8, the rotor 2 is located between the first bearing 3 and the second bearing 8. The first bearing 3 and the second bearing 8 cooperate to provide stable support for the rotating shaft 1 and the rotor 2 thereon.

[0072] In some embodiments, the above-mentioned motor may be a permanent magnet synchronous motor.

[0073] The present invention also provides a car, which may include any of the above-mentioned bearing assembly structures or the above-mentioned motors. Among them, because the car adopts the above-mentioned bearing assembly structure or the above-mentioned motor, since the first outer ring 31 is fixedly connected to the first sleeve 5, when the motor rotor is impacted by the axial force generated by the vehicle vibration and the axial leakage resistance of the motor, the locking force between the first outer ring 31 and the first sleeve 5 (when the first outer ring 31 and the first sleeve 5 are fixed by interference fit, the locking force is the friction resistance between the first outer ring 31 and the first sleeve 5) can reduce the axial movement of the first bearing 3, thereby reducing the impact of the first bearing 3 on the bearing pull plate on the first sleeve 5, and further reducing the abnormal noise and failure of the motor caused by excessive impact on the bearing pull plate in the prior art.

[0074] In some embodiments, the above-mentioned automobile may be a new energy automobile.

[0075] It is easy for those skilled in the art to understand that, without conflict, the advantageous technical features of the above-mentioned methods can be freely combined and superimposed.

[0076] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention. The above description is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present invention. These improvements and variations should also be regarded as the protection scope of the present invention.

Claims

1. A bearing assembly structure, characterized in that: The invention comprises a first bearing chamber (4), a first bearing (3) and a first sleeve (5), wherein the first bearing (3) has a first outer ring (31) and a first inner ring (32), and the first inner ring (32) can rotate relative to the first outer ring (31); The first sleeve (5) is sleeved between the side wall (41) of the first bearing chamber and the first bearing (3), and the first sleeve (5) is fixedly connected to the first outer ring (31); the first sleeve (5) has a bearing pull plate portion (51), the first sleeve (5) and the first bearing chamber (4) are relatively fixed, and the first sleeve (5) fixes the first outer ring (31) to the bottom surface (42) of the first bearing chamber along the axial direction of the motor through the bearing pull plate portion (51).

2. The bearing assembly structure according to claim 1, characterized in that: It also includes a first end cover (7) and a fastener (6), wherein the first bearing chamber (4) is arranged on the first end cover (7); The fastener (6) is used to be inserted into the first sleeve (5) from the outside of the first end cover (7) to fix the first sleeve (5) so that the first sleeve (5) and the first bearing chamber (4) remain relatively fixed.

3. The bearing assembly structure according to claim 2, characterized in that: The fastener (6) is detachable.

4. The bearing assembly structure according to any one of claims 1 to 3, characterized in that: The bearing pull plate portion (51) is integrally formed on the first sleeve (5); And / or, the bearing pull plate portion (51) is arranged at one end of the first sleeve (5) and extends radially inwardly of the first sleeve (5); And / or, the first sheath (5) and the first outer ring (31) are interference fit, so that the first sheath (5) and the first outer ring (31) are fixedly connected; And / or, the side wall (41) of the first bearing chamber and the first sleeve (5) are clearance-matched, and the two are kept relatively fixed in the circumferential direction.

5. The bearing assembly structure according to any one of claims 1 to 3, characterized in that: It also comprises a second bearing (8), an elastic member (10), a rotating shaft (1) and a second sleeve (9); the second bearing (8) and the first inner ring (32) are both sleeved on the rotating shaft (1), and the second bearing (8) is located on a side of the first bearing (3) that is away from the bottom surface (42) of the first bearing chamber; a stopper (101) is provided on the rotating shaft (1), and the stopper (101) abuts against a side (801) of the second bearing that is close to the first bearing; The second sleeve (9) and the first sleeve (5) have the same structure; the second sleeve (9) is sleeved on the radial outer side of the second bearing (8), and the bearing pull plate portion (91) of the second sleeve is located on the side (802) of the second bearing away from the stop portion; wherein the elastic member (10) applies force to the second bearing (8) by driving the bearing pull plate portion (91) of the second sleeve, so that the second bearing (8) pushes the rotating shaft (1) through the stop portion (101), so that the rotating shaft (1) drives the first bearing (3) to abut against the bottom surface (42) of the first bearing chamber.

6. The bearing assembly structure according to claim 5, characterized in that: It also includes a second bearing chamber (11) for accommodating the second bearing (8); The second sleeve (9) is sleeved between the side wall (111) of the second bearing chamber and the second bearing (8), and the second sleeve (9) is fixedly connected to the side wall (111) of the second bearing chamber in a circumferential direction; The second bearing (8) comprises a second outer ring (81) and a second inner ring (82), and the second inner ring (82) can rotate relative to the second outer ring (81); the second bearing (8) is sleeved on the rotating shaft (1) through the second inner ring (82), and the second inner ring (82) and the rotating shaft (1) are relatively fixed, and the second outer ring (81) and the second sleeve (9) are circumferentially fixed.

7. The bearing assembly structure according to claim 6, characterized in that: It also includes a second end cover (12), wherein the second bearing chamber (11) is a fixed sleeve arranged on the second end cover (12); The second end cover (12) has a first surface (121) opposite to the bearing pull plate portion (91) of the second sleeve, the bottom wall (112) of the second bearing chamber is located between the bearing pull plate portion (91) of the second sleeve and the first surface (121), and the bottom wall (112) of the second bearing chamber has a through hole (113); the elastic member (10) is located in the through hole (113) and abuts between the bearing pull plate portion (91) of the second sleeve and the first surface (121).

8. The bearing assembly structure according to claim 5, characterized in that: The assembly structure formed by the first sleeve (5) and the first bearing (3) is a first assembly structure, and the assembly structure formed by the second sleeve (9) and the second bearing (8) is a second assembly structure. The first assembly structure and the second assembly structure have the same structure.

9. A motor, characterized in that: The invention comprises the bearing assembly structure according to any one of claims 1 to 8.

10. An automobile, characterized in that: The invention comprises the bearing assembly structure described in any one of claims 1 to 8 or the motor described in claim 9.

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