A bushing, motor system and automobile

Abstract

The application discloses a bushing which can be arranged between a rotor shaft and a bearing, and / or between the bearing and a housing, and comprises a fixedly connected bushing body and a damping filler, and the bushing body and the damping filler are both circular rings, so that the bushing can be sleeved with the rotor shaft or the bearing; the bushing body can wrap part of the damping filler, so that the damping filler has a deformation space after the bushing is sleeved with the rotor shaft or the bearing, so that the damping filler can buffer the vibration between the rotor shaft and the bearing, and / or between the bearing and the housing during the operation of the motor, the boundary stiffness between the rotor shaft and the bearing, and / or between the bearing and the housing is adjusted, the vibration response frequency of the low-order bending mode of the motor rotor is adjusted, the coupled resonance of the motor is reduced, and the service life of the motor is prolonged.

Description

Technical Field

[0001] This application relates to the field of automotive parts and equipment technology, and more specifically, to a bushing, a motor system, and an automobile. Background Technology

[0002] In the existing technology, the motor rotor is usually fixed to the motor housing by bearings for power transmission. However, since the motor rotor generally has dense low-order bending modes, it is easy for the motor rotor to couple and resonate with other parts in the motor drive system when the motor is working. This can lead to problems such as large noise and severe vibration in the motor drive system, and long-term resonance can affect the service life of the motor.

[0003] In summary, how to reduce the coupling resonance of motors to extend their service life is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0004] In view of this, the purpose of this application is to provide a bushing, motor system and automobile that reduces motor coupling resonance to extend service life.

[0005] To achieve the above objectives, this application provides the following technical solution:

[0006] A bushing is provided between a rotor shaft and a bearing, and / or between the bearing and a housing. The bushing includes a bushing body and a damping filler. The bushing body and the damping filler are fixedly connected, and both the bushing body and the damping filler are annular. The bushing body can enclose a portion of the damping filler so that the damping filler can buffer vibrations between the rotor shaft and the bearing, and / or between the bearing and the housing.

[0007] In some embodiments, the bushing body is wider than the damping filler in its axial direction and forms a first side and a second side that are wider than the damping filler in its axial direction; in the radial direction of the bushing body, the distance between the first side of the bushing body and the center of the damping filler and the distance between the second side of the bushing body and the center of the damping filler are not equal.

[0008] In some embodiments, a rotor shaft groove is provided at the connection between the rotor shaft and the bearing, the damping filler is used to fill the rotor shaft groove and protrude from the rotor shaft groove, the bushing body is sleeved on the damping filler, the bushing body and the rotor shaft have unequal first gap and second gap, and the bushing body is used to interfere with the bearing.

[0009] And / or, a housing groove is provided at the connection between the housing and the bearing, the damping filler is used to fill the housing groove and protrude from the housing groove, the bushing body is sleeved on the inner ring of the damping filler, the bushing body and the housing have unequal first gap and second gap, and the bushing body is used to interfere with the bearing.

[0010] In some embodiments, the outer ring of the bearing has a first groove, the damping filler is used to fill the first groove and be higher than the first groove, the bushing body is sleeved on the damping filler, the bushing body and the outer ring of the bearing have unequal first gap and second gap, and the bushing body is used to interfere with the housing.

[0011] And / or, the inner ring of the bearing has a second groove, the damping filler is used to fill the second groove and is higher than the second groove, the bushing body is sleeved on the inner ring of the damping filler, the bushing body and the inner ring of the bearing have unequal first gap and second gap, and the bushing body is used to interfere with the rotor shaft.

[0012] In some embodiments, the bushing body includes a first bushing body and a second bushing body; the first bushing body is sleeved on the damping filler, and the second bushing body is sleeved on the inner ring of the damping filler, with a first gap and a second gap formed between the first bushing body and the second bushing body; the distance between the first gap and the center of the damping filler and the distance between the second gap and the center of the damping filler are not equal.

[0013] In some embodiments, the width of the first gap is equal to the width of the second gap;

[0014] Alternatively, the width of the first gap is not equal to the width of the second gap.

[0015] In some embodiments, the bushing is sleeved on the rotor shaft, the second bushing body is interference-fitted with the rotor shaft, and the first bushing body is interference-fitted with the bearing;

[0016] And / or, the bushing is fitted over the bearing, the second bushing body is interference-fitted with the bearing, and the first bushing body is interference-fitted with the housing.

[0017] In some embodiments, the damping filler is rubber; or, the damping filler is an injection-molded mixture of rubber and metal; the bushing body is made of metal.

[0018] In some embodiments, the width of the first gap is 0.1-0.5 mm;

[0019] And / or, the width of the second gap is 0.1-0.5 mm.

[0020] An electric motor system includes: a rotor shaft, bearings, a housing, and bushings as described above.

[0021] In some embodiments, the rotor shaft has a rotor shaft groove for mounting the bushing, and the depth of the rotor shaft groove is uneven.

[0022] And / or, the housing has a housing groove for mounting the bushing, and the depth of the housing groove is uneven;

[0023] And / or, the outer ring of the bearing has a first groove, the depth of which is uneven;

[0024] And / or, the inner ring of the bearing has a second groove, the depth of which is uneven.

[0025] An automobile, including the electric motor system described above.

[0026] The bushing provided in this application can be disposed between the rotor shaft and the bearing, and / or the bearing and the housing. The bushing includes a bushing body and a damping filler that are fixedly connected, and both the bushing body and the damping filler are annular to facilitate the bushing to be fitted with the rotor shaft or the bearing. The bushing body can cover part of the damping filler so that the damping filler has deformation space after the bushing is fitted with the rotor shaft or the bearing. This allows the damping filler to buffer the vibration between the rotor shaft and the bearing, and / or the bearing and the housing, during motor operation, thereby adjusting the boundary stiffness between the rotor shaft and the bearing, and / or the bearing and the housing, and adjusting the vibration response frequency of the low-order bending mode of the motor rotor, reducing the coupled resonance of the motor, and extending the service life of the motor. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0028] Figure 1 A schematic diagram of the assembly of a bushing and a motor rotor provided for an embodiment of this application;

[0029] Figure 2 for Figure 1 A cross-sectional view of the assembly diagram of the bushing and the motor rotor shown;

[0030] Figure 3For Figure 2 A partially enlarged schematic diagram of the sectional view shown;

[0031] Figure 4 This is a schematic diagram illustrating the assembly of a bushing with both the inner and outer rings of a bearing, as provided in an embodiment of this application.

[0032] Figure 5 A schematic diagram of another bushing structure provided in an embodiment of this application;

[0033] Figure 6 for Figure 5 A cross-sectional view of another bushing shown;

[0034] Figure 7 This is another assembly diagram of a bushing and bearing provided for an embodiment of this application.

[0035] Explanation of reference numerals in the attached figures:

[0036] 100 - Bushing body, 101 - First bushing body, 102 - Second bushing body;

[0037] 200-Damping filler;

[0038] 301 - First gap, 302 - Second gap;

[0039] 400 - Rotor shaft, 401 - Rotor shaft groove, 500 - Bearing, 501 - First groove, 502 - Second groove, 600 - Housing. Detailed Implementation

[0040] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0041] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. The terminology used in the following embodiments is for the purpose of describing specific embodiments only and is not intended to be a limitation of this application. As used in the specification and appended claims of this application, the singular expressions "a," "an," "the," "the," "the," and "this" are intended to also include expressions such as "one or more," unless the context clearly indicates otherwise. It should also be understood that in the embodiments of this application, "one or more" refers to one, two, or more; "and / or" describes the relationship between related objects, indicating that three relationships may exist; for example, A and / or B can represent: A alone, A and B simultaneously, or B alone, where A and B can be singular or plural. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship.

[0042] References to "one embodiment" or "some embodiments" as described in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0043] The "multiple" mentioned in the embodiments of this application refers to two or more. It should be noted that in the description of the embodiments of this application, terms such as "first" and "second" are used only for the purpose of distinguishing descriptions and should not be construed as indicating or implying relative importance, nor should they be construed as indicating or implying order.

[0044] The bushing provided in this application embodiment can be disposed between the rotor shaft 400 and the bearing 500, and / or between the bearing 500 and the motor housing 600. The bushing includes a bushing body 100 and a damping filler 200. The bushing body 100 and the damping filler 200 are fixedly connected, and both the bushing body 100 and the damping filler 200 are annular to facilitate the bushing's engagement with the rotor shaft 400 or the bearing 500. The bushing body 100 can enclose a portion of the damping filler 200, allowing the damping filler 200 to have deformation space after the bushing is engaged with the rotor shaft 400 or the bearing 500. This allows the damping filler 200 to buffer the vibration between the rotor shaft 400 and the bearing 500, and / or the bearing 500 and the housing 600 during motor operation, thereby adjusting the boundary stiffness between the rotor shaft 400 and the bearing 500, and / or the bearing 500 and the housing 600, and adjusting the vibration response frequency of the motor rotor's low-order bending modes to reduce coupled resonance and extend the motor's service life.

[0045] In some embodiments, the damping filler 200 is rubber, so that the damping filler 200 has a deformation space, and the damping force is provided by the rubber to achieve the buffering of vibration between the rotor shaft 400 and the bearing 500, and / or the bearing 500 and the housing 600.

[0046] In some other embodiments, the damping filler 200 is an injection-molded mixture of rubber and metal, wherein the metal can be high-toughness spring steel, aluminum alloy, titanium alloy, etc., which can increase the support force of the damping filler 200 and further provide a range for adjusting the boundary stiffness between the rotor shaft 400 and the bearing 500, and / or the bearing 500 and the housing 600.

[0047] The bushing body 100 provided in this application embodiment is made of metal, such as stainless steel, aluminum alloy, titanium alloy, etc., and this application embodiment does not limit it.

[0048] like Figure 3As shown, the bushing body 100 is axially capable of covering and being wider than the damping filler 200, so that the bushing body 100 can protect and support the damping filler 200. The bushing body 100 forms a first side and a second side axially wider than both sides of the damping filler 200. Furthermore, in the radial direction of the bushing body 100, the distances between the first side of the bushing body 100 and the center of the damping filler 200, and the distances between the second side of the bushing body 100 and the center of the damping filler 200, are not equal. At least one of the first and second sides can wrap around a portion of the radial direction of the damping filler 200 so that the bushing body 100 can support the damping filler 200. After the bushing is connected to the rotor shaft 400 / bearing 500 / housing 600, the first side of the bushing body 100, the damping filler 200, and the second side of the bushing body 100 can form a stepped distribution. This allows the stepped bushing to further adjust the vibration response frequency of the low-order bending mode of the motor rotor during motor operation, thereby reducing the coupled resonance of the motor.

[0049] In some embodiments, such as Figures 1-3 As shown, a rotor shaft groove 401 is provided at the connection between the rotor shaft 400 and the bearing 500. The damping filler 200 can fill the rotor shaft groove 401 and is higher than the rotor shaft groove 401. The bushing body 100 is sleeved on the damping filler 200, so that there are unequal first gaps 301 and second gaps 302 between the bushing body 100 and the rotor shaft 400. The bushing body 100 and the bearing 500 are interference-fitted. In this way, during the operation of the motor, the vibration between the bearing 500 and the rotor shaft 400 is buffered by the bushing, and the vibration response frequency of the low-order bending mode of the motor rotor is further transferred and adjusted by the unequal first gap 301 and second gap 302 to reduce the coupling resonance of the motor.

[0050] It should be noted that, as Figure 3 As shown, the rotor shaft groove 401 is an uneven groove. For example, the depth of the left side of the rotor shaft groove 401 is smaller than the depth of the right side, so that the rotor shaft groove 401 can be adjusted to fit the first gap 301 and the second gap 302 formed with the bushing body 100 to ensure the centering capability of the rotor shaft during rotation, reduce the deviation of the rotor shaft from the axial center, and further transfer and adjust the vibration response frequency of the low-order bending mode of the motor rotor to reduce the coupling resonance of the motor.

[0051] In some other embodiments, a housing groove can be formed at the connection between the housing 600 and the bearing 500. The damping filler 200 can fill the housing groove and be higher than the housing groove. The bushing body 100 is fitted on the inner ring of the damping filler 200, so that there is an unequal first gap 301 and a second gap 302 between the bushing body 100 and the housing 600. The bushing body 100 is also interference-fitted with the bearing 500. In this way, during the operation of the motor, the vibration between the bearing 500 and the housing 600 is buffered by the bushing, and the vibration response frequency of the low-order bending mode of the motor rotor is further transferred and adjusted by the unequal first gap 301 and second gap 302, so as to reduce the coupling resonance of the motor.

[0052] It should be noted that the housing groove is an uneven groove. For example, the depth of the left side of the housing groove is smaller than the depth of the right side, so that the housing groove can be adjusted to fit the first gap 301 and the second gap 302 formed with the bushing body 100, so as to ensure the centering capability during the rotation of the rotor shaft, reduce the deviation of the rotor shaft from the axial center, and further transfer and adjust the vibration response frequency of the low-order bending mode of the motor rotor to reduce the coupling resonance of the motor.

[0053] In other embodiments, such as Figure 4 As shown, the outer ring of the bearing 500 has a first groove 501, and the inner ring of the bearing 500 has a second groove 502. The damping filler 200 can fill the first groove 501 and the second groove 502, and is higher than the first groove 501 and the second groove 502. The bushing body 100 is respectively fitted onto the outer ring of the damping filler 200 and the inner ring of the damping filler 200, and forms a first gap 301 and a second gap 302 with the outer ring and the inner ring of the bearing 500, respectively. The bushing body 100 is interference-fitted with the housing 600 and the rotor shaft 400, so that the bushing is simultaneously installed on the inner ring and the outer ring of the bearing 500, so as to simultaneously buffer the vibration between the bearing 500 and the housing 600, and between the bearing 500 and the rotor shaft 400, and further transfer and adjust the vibration response frequency of the low-order bending mode of the motor rotor to reduce the coupling resonance of the motor.

[0054] Of course, the bushing can also be connected only to the inner ring of the bearing 500 or only to the outer ring of the bearing 500. The choice can be made according to actual needs, and this application embodiment does not limit this.

[0055] It should be noted that both the first groove 501 and the second groove 502 are uneven grooves, for example, as shown in the figure. Figure 4As shown, the depth of the left side of the first groove 501 is smaller than the depth of the right side, and the depth of the right side of the second groove 502 is smaller than the depth of the left side, so that the first groove 501 and the second groove 502 can be adjusted with the first gap 301 and the second gap 302 formed with the bushing body 100 to ensure the centering capability during the rotation of the rotor shaft, reduce the deviation of the rotor shaft from the axial center, and further transfer and adjust the vibration response frequency of the low-order bending mode of the motor rotor to reduce the coupling resonance of the motor.

[0056] In practice, the damping filler 200 can be thermosetting and filled into the groove to be filled. The thermosetting process can be used to fix the bushing body 100 and the damping filler 200 together to ensure the connection strength between the bushing and the connecting parts, thereby improving the stability of the bushing operation and further reducing the coupling resonance of the motor.

[0057] like Figures 5-6 As shown, the bushing body 100 provided in this application embodiment also includes a first bushing body 101 and a second bushing body 102. The first bushing body 101 is sleeved on the damping filler 200, and the second bushing body 102 is sleeved on the inner ring of the damping filler 200. The first bushing body 101 and the second bushing body 102 wrap the damping filler 200, so that a first gap 301 and a second gap 302 are formed between the first bushing body 101 and the second bushing body 102. The distance between the first gap 301 and the center of the damping filler 200 and the distance between the second gap 302 and the center of the damping filler 200 are not equal, so that the first gap 301, the damping filler 200 and the second gap 302 form a stepped distribution. This results in different compressive forces on the damping filler 200 by the first bushing body 101 and the second bushing body 102, so that the bushing can adjust the vibration response frequency of the low-order bending mode of the motor rotor to reduce the coupling resonance of the motor.

[0058] It should be noted that the first bushing body 101 and the second bushing body 102 are formed by thermosetting process to ensure the connection strength of the bushing bodies.

[0059] In some embodiments, the widths of the first gap 301 and the second gap 302 formed by the first bushing body 101 and the second bushing body 102 are equal to simplify the manufacturing process.

[0060] In some other embodiments, the widths of the first gap 301 and the second gap 302 formed by the first bushing body 101 and the second bushing body 102 are not equal, so as to further increase the range of vibration response frequencies of the low-order bending mode of the motor rotor and further reduce motor coupling resonance.

[0061] In some embodiments, the bushing can be fitted onto the rotor shaft 400, the second bushing body 102 is interference-fitted with the rotor shaft 400, and the first bushing body 101 is interference-fitted with the bearing 500, so that the bushing is disposed between the rotor shaft 400 and the bearing 500. Through the compression of the damping filler 200 by the first bushing body 101 and the second bushing body 102, the damping filler 200 can buffer the vibration between the bearing 500 and the rotor shaft 400, and reduce the motor coupling resonance.

[0062] In some other embodiments, the bushing can be fitted over the bearing 500, the second bushing body 102 can be interference-fitted with the bearing 500, and the first bushing body 101 can be interference-fitted with the housing 600, so that the bushing is positioned between the housing 600 and the bearing 500. Through the compression of the damping filler 200 by the first bushing body 101 and the second bushing body 102, the damping filler 200 can buffer the vibration between the bearing 500 and the housing 600, and reduce the motor coupling resonance.

[0063] It should be noted that, in actual practice, the housing 600 is provided with a bearing seat for mounting the bearing 500. It can be understood that the limitation of the housing 600 in all the above embodiments actually acts on the corresponding position of the bearing seat, which will not be repeated here.

[0064] To ensure that the bushing can operate normally in the motor, in all the above embodiments, the width of the first gap 301 is 0.1-0.5mm and the width of the second gap 302 is 0.1-0.5mm, so that the first gap 301 and the second gap 302 have space to accommodate the deformation of the damping filler 200.

[0065] In the bushing operation process provided in this application embodiment, all the above embodiments can be combined arbitrarily;

[0066] For example, a rotor shaft groove 401 can be opened at one end of the rotor shaft 400 and filled with damping filler 200. Then, a bushing body 100 can be fixed outside the damping filler 200 and pressurized with the bearing 500. A bushing formed by the first bushing body 101, the damping filler 200 and the second bushing body 102 can be directly sleeved between the other end of the rotor shaft 400 and the bearing 500.

[0067] For example, a first groove 501 and a second groove 502 can be formed on the outer and inner rings of the bearing 500 at one end of the rotor shaft 400, and bushings can be installed between the bearing 500 and the housing 600, and between the bearing 500 and the rotor shaft 400; and a bushing formed by the first bushing body 101, the damping filler 200, and the second bushing body 102 can be directly sleeved between the housing 600 and the bearing 500 at the other end of the rotor shaft 400.

[0068] For example, a housing groove can be formed at one end of the rotor shaft 400 at the housing 600, and a bushing can be installed between the housing 600 and the bearing 500; at the same time, a rotor shaft groove 401 can be formed at the other end of the rotor shaft 400, and a bushing can be installed between the rotor shaft 400 and the bearing 500.

[0069] For example, a rotor shaft groove 401 can be formed at one end of the rotor shaft 400, and a housing groove can be formed at the connection between the housing 600 and the bearing 500. Bushings can be installed between the rotor shaft 400 and the bearing 500, and between the bearing 500 and the housing 600. Bushings formed by the first bushing body 101, the damping filler 200, and the second bushing body 102 can be directly sleeved between the rotor shaft 400 and the bearing 500, and between the bearing 500 and the housing 600 at the other end of the rotor shaft 400.

[0070] Of course, the combinations provided in the examples are not limited to those provided in the examples. Other combinations can be made according to actual needs. This application does not limit the specific combinations.

[0071] Bushings are installed between the rotor shaft 400 and the bearing 500, and between the bearing 500 and the housing 600, depending on the different combinations. These bushings can buffer the vibration between the rotor shaft 400 and the bearing 500, and between the bearing 500 and the housing 600, during motor operation. This adjusts the boundary stiffness between the rotor shaft 400 and the bearing 500, and between the bearing 500 and the housing 600, thereby adjusting the vibration response frequency of the low-order bending mode of the motor rotor, reducing coupled resonance of the motor, and extending the service life of the motor.

[0072] This application also provides a motor system including the bushing described in the above embodiments. The motor system further includes a rotor shaft 400, a bearing 500, and a housing 600.

[0073] Depending on the type of bushing to be installed, the motor system may have a rotor shaft groove 401 of varying depth on the rotor shaft 400; or a housing groove of varying depth at the connection between the housing 600 and the bearing 500; or a first groove 501 of varying depth on the outer ring of the bearing 500; or a second groove 502 of varying depth on the inner ring of the bearing 500. Of course, different combinations may be made according to actual needs, and this application embodiment does not limit this.

[0074] Since the bushing has the aforementioned technical effects, and the motor system includes the bushing, the motor system also has the corresponding technical effects, which will not be elaborated here.

[0075] This application also provides a vehicle that includes the motor system described in the above embodiments.

[0076] Since the aforementioned motor system has the aforementioned technical effects, and the aforementioned automobile includes the aforementioned motor system, the aforementioned automobile also has the corresponding technical effects, which will not be elaborated here.

[0077] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A bushing, characterized in that, For use between the rotor shaft (400) and the bearing (500), and / or between the bearing (500) and the housing (600), the bushing includes: a bushing body (100) and a damping filler (200). The bushing body (100) is fixedly connected to the damping filler (200), and both the bushing body (100) and the damping filler (200) are annular. The bushing body (100) can enclose a portion of the damping filler (200) so that the damping filler (200) can buffer vibrations between the rotor shaft (400) and the bearing (500), and / or between the bearing (500) and the housing (600).

2. The bushing according to claim 1, characterized in that, The bushing body (100) is wider than the damping filler (200) in its axial direction and forms a first side and a second side that are wider than the damping filler (200) in the axial direction. In the radial direction of the bushing body (100), the distance between the first side of the bushing body (100) and the center of the damping filler (200) is not equal to the distance between the second side of the bushing body (100) and the center of the damping filler (200).

3. The bushing according to claim 2, characterized in that, A rotor shaft groove (401) is provided at the connection between the rotor shaft (400) and the bearing (500). The damping filler (200) is used to fill the rotor shaft groove (401) and protrude from the rotor shaft groove (401). The bushing body (100) is sleeved on the damping filler (200). There are unequal first gaps (301) and second gaps (302) between the bushing body (100) and the rotor shaft (400). The bushing body (100) is used for interference fit with the bearing (500). And / or, a housing groove is provided at the connection between the housing (600) and the bearing (500), the damping filler (200) is used to fill the housing groove and protrude from the housing groove, the bushing body (100) is sleeved on the inner ring of the damping filler (200), the bushing body (100) and the housing (600) have unequal first gap (301) and second gap (302), and the bushing body (100) is used to interfere with the bearing (500).

4. The bushing according to claim 2, characterized in that, The outer ring of the bearing (500) has a first groove (501), the damping filler (200) is used to fill the first groove (501) and is higher than the first groove (501), the bushing body (100) is sleeved on the damping filler (200), the bushing body (100) and the outer ring of the bearing (500) have unequal first gap (301) and second gap (302), and the bushing body (100) is used to interfere with the housing (600); And / or, the inner ring of the bearing (500) has a second groove (502), the damping filler (200) is used to fill the second groove (502) and is higher than the second groove, the bushing body (100) is sleeved on the inner ring of the damping filler (200), the bushing body (100) and the inner ring of the bearing (500) have unequal first gap (301) and second gap (302), and the bushing body (100) is used to interfere with the rotor shaft (400).

5. The bushing according to claim 1, characterized in that, The bushing body (100) includes a first bushing body (101) and a second bushing body (102). The first bushing body (101) is sleeved on the damping filler (200), and the second bushing body (102) is sleeved on the inner ring of the damping filler (200). A first gap (301) and a second gap (302) are formed between the first bushing body (101) and the second bushing body (102). The distance between the first gap (301) and the center of the damping filler (200) is not equal to the distance between the second gap (302) and the center of the damping filler (200).

6. The bushing according to claim 5, characterized in that, The width of the first gap (301) is equal to the width of the second gap (302); Alternatively, the width of the first gap (301) is not equal to the width of the second gap (302).

7. The bushing according to claim 5, characterized in that, The bushing is fitted over the rotor shaft (400), the second bushing body (102) is interference-fitted with the rotor shaft (400), and the first bushing body (101) is interference-fitted with the bearing (500); And / or, the bushing is fitted over the bearing (500), the second bushing body (102) is interference-fitted with the bearing (500), and the first bushing body (101) is interference-fitted with the housing (600).

8. The bushing according to any one of claims 1-7, characterized in that, The damping filler (200) is rubber; or, the damping filler (200) is an injection-molded mixture of rubber and metal; The bushing body (100) is made of metal.

9. The bushing according to any one of claims 3-7, characterized in that, The width of the first gap (301) is 0.1-0.5 mm; And / or, the width of the second gap (301) is 0.1-0.5 mm.

10. A motor system, characterized in that, include: The rotor shaft (400), bearing (500), housing (600), and bushing as described in any one of claims 1-9.

11. The motor system according to claim 10, characterized in that, The rotor shaft (400) has a rotor shaft groove (401) for mounting the bushing, and the depth of the rotor shaft groove (401) is uneven. And / or, the housing (600) has a housing groove for mounting the bushing, the depth of the housing groove being uneven; And / or, the outer ring of the bearing (500) is provided with a first groove (501), the depth of the first groove (501) is uneven; And / or, the inner ring of the bearing (500) is provided with a second groove (502), the depth of the second groove (502) is uneven.

12. A car, characterized in that, Including the motor system as described in any one of claims 10-11.

Images