Vibration reduction device, motor suspension system and electric vehicle

Abstract

The present disclosure provides a vibration reduction device, a motor suspension system and an electric vehicle, wherein the vibration reduction device comprises: a first bracket and a second bracket; a second vibration reduction member is arranged between the first bracket and the second bracket; a first protrusion structure is provided on the end surface of the second vibration reduction member contacting the first bracket, and the first protrusion structure is configured to reduce the contact area between the second vibration reduction member and the first bracket, and / or a second protrusion structure is provided on the end surface of the second vibration reduction member contacting the second bracket, and the second protrusion structure is configured to reduce the contact area between the second vibration reduction member and the second bracket; a connecting member passes through the first bracket, the second vibration reduction member and the second bracket in sequence. The vibration reduction device provided by the present disclosure changes the contact surface between the vibration reduction member and the bracket from the traditional surface contact to the point or line contact of the protrusion structure, thereby reducing the contact area between the two and the transmission area of ​​vibration. At the same time, the protrusion structure also has good deformation vibration absorption efficiency, and can achieve a good vibration reduction effect.

Description

Technical Field

[0001] The present invention belongs to the technical field of electric vehicles, and in particular relates to a vibration reduction device, a motor suspension system and an electric vehicle. Background Art

[0002] Electric vehicles use power batteries as their main driving energy source and are driven by electric motors. They do not require fuel consumption and achieve zero pollutant emissions.

[0003] When an electric vehicle is running, the motor rotates at high speed. During the rotation of the rotor, it is affected by its own tooth torque, electromagnetic force and other excitations, generating vibrations. The vibrations generated by the motor will be transmitted to the car frame in contact with it, and then to the car body and seats. During the vibration transmission process, due to the effect of resonance, the vibrations transmitted to the car body and seats are greater, so even a slight vibration of the motor may affect the experience of the driver and passengers, which is not good for health in the long run. Summary of the invention

[0004] Therefore, the technical problem to be solved by the present disclosure is that the vibration generated by the motor is transmitted to the car frame, and then to the car body and seats, affecting the user experience of the electric car and the health of the occupants, thereby providing a vibration reduction device, a motor suspension system and an electric car.

[0005] In order to solve the above problems, the present disclosure provides a vibration reduction device, comprising:

[0006] A first bracket and a second bracket;

[0007] A second vibration damper, the second vibration damper is arranged between the first bracket and the second bracket; a first protrusion structure is provided on the end surface of the second vibration damper in contact with the first bracket, and the first protrusion structure is configured to reduce the contact area between the second vibration damper and the first bracket, and / or a second protrusion structure is provided on the end surface of the second vibration damper in contact with the second bracket, and the second protrusion structure is configured to reduce the contact area between the second vibration damper and the second bracket;

[0008] The connecting member passes through the first bracket, the second vibration damping member and the second bracket in sequence.

[0009] In some embodiments, the vibration reduction device includes an elastic member, which is inserted between the connecting member and the second vibration reduction member. The elastic member is configured to support the first bracket and the second bracket and to buffer and absorb vibration energy between the first bracket and the second bracket.

[0010] In some embodiments, when the vibration reduction device includes a first protruding structure and a second protruding structure, projections of the first protruding structure and the second protruding structure along the axial direction of the second vibration reduction member do not overlap.

[0011] In some embodiments, a first fixing plate is provided between the second vibration damper and the first bracket, the first fixing plate is provided with a first fixing hole, and the first fixing hole is configured to accommodate and fix the end of the elastic member; a second fixing plate is provided between the second vibration damper and the second bracket, the second fixing plate is provided with a second fixing hole, and the second fixing hole is configured to accommodate and fix the end of the elastic member.

[0012] In some embodiments, the first fixing plate is connected to the first bracket via a second connecting member; the second fixing plate is connected to the second bracket via a second connecting member.

[0013] In some embodiments, the vibration damping device also includes a first vibration damper, which is arranged on a side of the first bracket away from the second vibration damper, and the first bracket has a first connecting hole, one end of the first vibration damper extends into the first connecting hole, and the connecting member passes through the first vibration damper, and the first vibration damper is configured to make the first bracket and the connecting member non-directly contact.

[0014] In some embodiments, a third protrusion structure is provided on the end surface of the first vibration damper that contacts the first bracket, and the third protrusion structure is configured to reduce the contact area between the first vibration damper and the first bracket.

[0015] In some embodiments, a first baffle is provided at the end of the first vibration damper away from the first bracket, and the connecting member passes through the first baffle and then into the first vibration damper. A fourth protrusion structure is provided on the end surface of the first vibration damper that contacts the first baffle, and the fourth protrusion structure is configured to reduce the contact area between the first vibration damper and the first baffle.

[0016] In some embodiments, the first vibration damping member includes a stepped member and an annular member. The stepped member and the annular member have different vibration damping energies. The minimum outer diameter of the stepped member is equal to the diameter of the first connecting hole, the inner diameter of the annular member is equal to the diameter of the first connecting hole, and the annular member is sleeved on the stepped member.

[0017] In some embodiments, the vibration damping device also includes a third vibration damper, which is arranged on a side of the second bracket away from the second vibration damper, and the second bracket has a second connecting hole. One end of the third vibration damper extends into the second connecting hole, and the connecting member contacts the second bracket through the third vibration damper. The third vibration damper is configured to make the second bracket non-directly contact with the connecting member.

[0018] In some embodiments, a fifth protrusion structure is provided on the end surface of the third vibration damper that contacts the second bracket, and the fifth protrusion structure is configured to reduce the contact area between the third vibration damper and the second bracket.

[0019] In some embodiments, a second baffle is provided at the end of the third vibration damper away from the second bracket. After the connecting member passes through the third vibration damper, it passes out of the second baffle. A sixth protrusion structure is provided on the end surface of the third vibration damper that contacts the second baffle. The sixth protrusion structure is configured to reduce the contact area between the third vibration damper and the second baffle.

[0020] In some embodiments, the third vibration damping member includes a stepped member and an annular member. The stepped member and the annular member have different vibration damping energies. The minimum outer diameter of the stepped member is equal to the diameter of the second connecting hole, the inner diameter of the annular member is equal to the diameter of the second connecting hole, and the annular member is sleeved on the stepped member.

[0021] In some embodiments, when the second vibration damper includes a first protrusion structure, the first protrusion structure is a convex structure extending radially along the second vibration damper; and / or, when the second vibration damper includes a second protrusion structure, the second protrusion structure is a convex structure extending radially along the second vibration damper; and / or, when the first vibration damper includes a third protrusion structure, the third protrusion structure is a convex structure extending radially along the first vibration damper; and / or, when the first vibration damper includes a fourth protrusion structure, the fourth protrusion structure is a convex structure extending radially along the first vibration damper; and / or, when the third vibration damper includes a fifth protrusion structure, the fifth protrusion structure is a convex structure extending radially along the third vibration damper; and / or, when the third vibration damper includes a sixth protrusion structure, the sixth protrusion structure is a convex structure extending radially along the third vibration damper.

[0022] A motor suspension system adopts the above-mentioned vibration reduction device.

[0023] An electric vehicle adopts the above-mentioned vibration reduction device.

[0024] The vibration reduction device, motor suspension system and electric vehicle provided by the present disclosure have at least the following beneficial effects:

[0025] The vibration reduction device provided by the present invention changes the contact surface between the vibration reduction member and the bracket from traditional surface contact to point or line contact of the raised structure, thereby reducing the contact area between the two and reducing the vibration transmission area. At the same time, the raised structure also has good deformation vibration absorption efficiency and can achieve good vibration reduction effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a schematic structural diagram of a vibration reduction device according to an embodiment of the present disclosure;

[0027] Figure 2 It is a schematic structural diagram of a first bracket and a second bracket of an embodiment of the present disclosure;

[0028] Figure 3 is a schematic structural diagram of a second vibration damping member according to an embodiment of the present disclosure;

[0029] Figure 4 It is a schematic structural diagram of a first fixing plate and a second fixing plate of an embodiment of the present disclosure;

[0030] Figure 5 It is a schematic structural diagram of a stepped member according to an embodiment of the present disclosure;

[0031] Figure 6 It is a structural schematic diagram of a ring member according to an embodiment of the present disclosure;

[0032] Figure 7 It is a schematic structural diagram of a bushing according to an embodiment of the present disclosure.

[0033] The reference numerals are:

[0034] 1. First bracket; 2. Second bracket; 3. Second vibration damping member; 4. First protruding structure; 5. Second protruding structure; 6. Connecting member; 7. Elastic member; 8. First fixing plate; 9. First fixing hole; 10. Second fixing plate; 11. Second fixing hole; 12. Second connecting member; 13. First vibration damping member; 14. First connecting hole; 15. Third protruding structure; 16. First baffle; 17. Fourth protruding structure; 18. Stepped member; 19. Ring member; 20. Third vibration damping member; 21. Second connecting hole; 22. Fifth protruding structure; 23. Second baffle; 24. Sixth protruding structure; 25. Bushing. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solutions and advantages of the present disclosure clearer, the technical solutions of the present disclosure will be clearly and completely described below in combination with the specific embodiments of the present disclosure and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present disclosure.

[0036] Combination Figures 1 to 6 As shown, an embodiment of the present disclosure provides a vibration reduction device, comprising: a first bracket 1, a second bracket 2; a second vibration reduction member 3, wherein the second vibration reduction member 3 is arranged between the first bracket 1 and the second bracket 2; a first protrusion structure 4 is provided on the end surface of the second vibration reduction member 3 in contact with the first bracket 1, and the first protrusion structure 4 is configured to reduce the contact area between the second vibration reduction member 3 and the first bracket 1, and / or a second protrusion structure 5 is provided on the end surface of the second vibration reduction member 3 in contact with the second bracket 2, and the second protrusion structure 5 is configured to reduce the contact area between the second vibration reduction member 3 and the second bracket 2; a connecting member 6, wherein the connecting member 6 passes through the first bracket 1, the second vibration reduction member 3, and the second bracket 2 in sequence.

[0037] The vibration reduction device provided in the embodiment of the present disclosure changes the contact surface between the vibration reduction member and the bracket from the traditional surface contact to the point or line contact of the raised structure, thereby reducing the contact area between the two and reducing the vibration transmission area. At the same time, the raised structure also has good deformation vibration absorption efficiency and can achieve a good vibration reduction effect.

[0038] In some embodiments, the vibration reduction device includes an elastic member 7, such as a spring. The elastic member 7 is connected between the connecting member 6 and the second vibration reduction member 3. The elastic member 7 is configured to support the first bracket 1 and the second bracket 2, and to buffer and absorb the vibration energy between the first bracket 1 and the second. The elastic member 7 is used as a support member of the motor bracket, which can not only support the motor to protect the second vibration reduction member 3, but also utilize the compressibility of the elastic member 7 to achieve buffering and vibration reduction effects.

[0039] In some embodiments, when the vibration damping device includes a first protrusion structure 4 and a second protrusion structure 5, the projections of the first protrusion structure 4 and the second protrusion structure 5 along the axial direction of the second vibration damping member 3 do not overlap, that is, the two end face protrusion structures of the second vibration damping member 3 are staggered, thereby preventing the motor vibration from being directly transmitted through the upper and lower protrusion structures, thereby reducing the transmission of motor vibration.

[0040] In some embodiments, the overall thickness of the second vibration damper 3 is the distance between the first fixed plate 8 and the second fixed plate 10 after the elastic member 7 is compressed. In the initial state when the motor is not running, the elastic member 7 is compressed by the gravity of the motor, and the elastic member 7 supports the motor while protecting the second vibration damper 3 from being in a non-compressed and deformed state.

[0041] In some embodiments, a first fixing plate 8 is provided between the second vibration damper 3 and the first bracket 1, and the first fixing plate 8 is provided with a first fixing hole 9, and the first fixing hole 9 is configured to accommodate and fix the end of the elastic member 7, and the first fixing hole 9 can be designed as a stepped hole or an internal threaded hole; a second fixing plate 10 is provided between the second vibration damper 3 and the second bracket 2, and the second fixing plate 10 is provided with a second fixing hole 11, and the second fixing hole 11 is configured to accommodate and fix the end of the elastic member 7. The main function of the first fixing plate 8 is to fix the elastic member 7. The elastic member 7 is restricted by the first fixing hole 9 and can only be compressed in the axial direction, and is completely restricted in the vertical and axial directions, so that it deforms and absorbs energy only when the first bracket 1 and the second bracket 2 are displaced relative to each other.

[0042] In some embodiments, the first fixing plate 8 is connected to the first bracket 1 through the second connecting member 12; the second fixing plate 10 is connected to the second bracket 2 through the second connecting member 12, and a bushing 25 is required to be sleeved outside the second connecting member 12. The bushing 25 includes two parts: a metal sleeve and rubber. The metal sleeve protects the rubber from damage due to the screw thread, and the rubber can reduce the vibration from the motor to the horizontal direction of the vehicle body.

[0043] In some embodiments, the inner diameters of the first fixing hole 9 and the second fixing hole 11 are larger than the outer diameter of the connecting member 6 to ensure that no rigid contact occurs and to avoid transmission of vibration.

[0044] In some embodiments, the vibration damping device further includes a first vibration damper 13 and a third vibration damper 20. The first vibration damper 13 is disposed on a side of the first bracket 1 away from the second vibration damper 3. The first bracket 1 has a first connection hole 14. One end of the first vibration damper 13 extends into the first connection hole 14. The connecting member 6 passes through the first vibration damper 13. The first vibration damper 13 is configured to make the first bracket 1 in non-direct contact with the connecting member 6. The third vibration damper 20 is disposed on a side of the second bracket 2 away from the second vibration damper 3. The second bracket 2 has a second connection hole 21. One end of the third vibration damper 20 extends into the second connection hole 21. The connecting member 6 contacts the second bracket 2 through the third vibration damper 20. The third vibration damper 20 is configured to make the second bracket 2 in non-direct contact with the connecting member 6.

[0045] As the only rigid connecting component between the first bracket 1 and the second bracket 2, the connecting member 6 adopts standard or non-standard bolts. In order to prevent the connecting member 6 from directly contacting the first bracket 1 or the second bracket 2 and transmitting vibration, a first vibration damping member 13 is arranged between the connecting member 6 and the first bracket 1 to avoid direct contact between the connecting member 6 and the first bracket 1 and transmission of vibration, and a second vibration damping member 3 is arranged between the connecting member 6 and the second bracket 2 to avoid direct contact between the connecting member 6 and the second bracket 2 and transmission of vibration.

[0046] In some embodiments, a third protrusion structure 15 is provided on the end surface where the first vibration damper 13 contacts the first bracket 1, and the third protrusion structure 15 is configured to reduce the contact area between the first vibration damper 13 and the first bracket 1. A fifth protrusion structure 22 is provided on the end surface where the third vibration damper 20 contacts the second bracket 2, and the fifth protrusion structure 22 is configured to reduce the contact area between the third vibration damper 20 and the second bracket 2. The surface contact between the first vibration damper 13 and the first bracket 1 and the surface contact between the third vibration damper 20 and the second bracket 2 are also changed to line and point contacts to reduce the vibration transmission path.

[0047] In some embodiments, a first baffle 16 is provided at the end of the first vibration damper 13 away from the first bracket 1, and the connecting member 6 passes through the first baffle 16 and then penetrates into the first vibration damper 13. A fourth protrusion structure 17 is provided on the end surface of the first vibration damper 13 in contact with the first baffle 16, and the fourth protrusion structure 17 is configured to reduce the contact area between the first vibration damper 13 and the first baffle 16. A second baffle 23 is provided at the end of the third vibration damper 20 away from the second bracket 2, and the connecting member 6 passes through the third vibration damper 20 and then passes out of the second baffle 23. A sixth protrusion structure 24 is provided on the end surface of the third vibration damper 20 in contact with the second baffle 23, and the sixth protrusion structure 24 is configured to reduce the contact area between the third vibration damper 20 and the second baffle 23. Since the end of the connecting member 6, i.e., the nut portion or the nut portion, has a small area, the force-bearing area is small during the threading and fixing, and the first vibration damper 13 and the third vibration damper 20 are made of materials such as rubber, and the local texture hardness is small, which will cause the problem of small force-bearing area and inability to fully fix. Therefore, the first baffle 16 and the second baffle 23 are provided to increase the force-bearing area of ​​the first vibration damper 13 and the third vibration damper 20 to ensure the connection strength of each component.

[0048] In some embodiments, the first vibration damper 13 and the second vibration damper 3 both include a stepped member 18 and an annular member 19. The stepped member 18 and the annular member 19 have different vibration damping energies. The minimum outer diameter of the stepped member 18 is equal to the diameter of the first connecting hole 14 or the second connecting hole 21. The inner diameter of the annular member 19 is equal to the diameter of the first connecting hole 14 or the second connecting hole 21. The annular member 19 is sleeved on the stepped member 18.

[0049] For example, on the first vibration damping member 13, the third protruding structure 15 is arranged at the end with a larger outer diameter of the stepped member 18, the stepped member 18 is in contact with the first baffle 16, and the fourth protruding structure 17 is arranged on the annular member 19, the annular member 19 is in contact with the first bracket 1, and the force of the first baffle 16 and the first bracket 1 is transmitted through the stepped annular surface of the stepped member 18 and the annular member 19, which can play a certain vibration reduction role.

[0050] At the same time, the upper and lower planes of the first vibration damper 13 are matched to form a matching body with convex upper and lower surfaces. At the same time, the two vibration damping parts, namely the stepped part 18 and the annular part 19, can use materials of different hardness or different materials, so that the first vibration damper 13 can produce a multi-level vibration damping effect.

[0051] The third vibration damping member 20 also has the same multi-stage vibration damping effect.

[0052] In some embodiments, when the second vibration damper 3 includes a first protrusion structure 4, the first protrusion structure 4 is a convex structure extending radially along the second vibration damper 3; and / or, when the second vibration damper 3 includes a second protrusion structure 5, the second protrusion structure 5 is a convex structure extending radially along the second vibration damper 3; and / or, when the first vibration damper 13 includes a third protrusion structure 15, the third protrusion structure 15 is a convex structure extending radially along the first vibration damper 13; and / or, when the first vibration damper 13 includes a fourth protrusion structure 17, the fourth protrusion structure 17 is a convex structure extending radially along the first vibration damper 13; and / or, when the third vibration damper 20 includes a fifth protrusion structure 22, the fifth protrusion structure 22 is a convex structure extending radially along the third vibration damper 20; and / or, when the third vibration damper 20 includes a sixth protrusion structure 24, the sixth protrusion structure 24 is a convex structure extending radially along the third vibration damper 20.

[0053] The protrusion structure in this embodiment adopts a radial convex strip structure, which can ensure the uniformity and stability of the convex strip support and can also achieve the function of reducing the contact area and reducing vibration transmission.

[0054] In this embodiment, the connecting member 6, such as a bolt, passes through the first baffle 16, the first vibration damper 13, the first bracket 1, the first fixing plate 8, the second vibration damper 3, the second fixing plate 10, the second bracket 2, the third vibration damper 20, and the second baffle 23 in sequence, and the end is locked by a nut.

[0055] In principle, the present disclosure is mainly aimed at the situation that when the car is running, the motor is affected by some of its own excitation forces and produces vibrations. The motor vibration will be transmitted to the car body through the suspension system, affecting the experience. Therefore, elastic parts and vibration damping parts are used in its transmission path to achieve multi-level vibration reduction and vibration reduction in multiple directions. The elastic part 6 is mainly used to support the motor and protect the second vibration damping part 3 in the initial state. When the motor is running and generates vibrations in the vertical direction, the elastic part 7 will continue to be compressed and deformed by force, playing a role of buffering and vibration reduction. At the same time, the first protrusion structure 4 and the second protrusion structure 5 of the second vibration damping part 3 will also be compressed, playing a role of vibration reduction, and changing from traditional surface contact to line contact to achieve vibration reduction. At the same time, when the force is too large, the protrusions on the first vibration damping part 13 and the third vibration damping part 20 will also be compressed, playing a role of vibration reduction, thereby achieving the effect of multi-level vibration reduction. In the horizontal direction, when the connecting member 6 passes through the first connecting hole 14 of the first bracket 1 and the second connecting hole 21 of the second bracket 2, it is separated by the stepped member 18 of the first vibration damping member 13 or the third vibration damping member 20, avoiding rigid contact between the connecting member and the first bracket 1 and the second bracket 2, thereby achieving a vibration reduction effect.

[0056] A motor suspension system adopts the above-mentioned vibration reduction device.

[0057] An electric vehicle adopts the above-mentioned vibration reduction device.

[0058] It is easy for those skilled in the art to understand that, under the premise of no conflict, the above-mentioned advantageous methods can be freely combined and superimposed.

[0059] The above are only preferred embodiments of the present disclosure and are not intended to limit the present disclosure. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present disclosure shall be included in the protection scope of the present disclosure. The above are only preferred implementations of the present disclosure. 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 disclosure, and these improvements and variations should also be regarded as the protection scope of the present disclosure.

Claims

1. A vibration reduction device for a motor suspension system, wherein the motor suspension system comprises a motor, characterized in that: include: A first bracket (1), a second bracket (2); a second vibration damper (3), the second vibration damper (3) being arranged between the first bracket (1) and the second bracket (2); a first protruding structure (4) being provided on the end surface of the second vibration damper (3) in contact with the first bracket (1), the first protruding structure (4) being configured to reduce the contact area between the second vibration damper (3) and the first bracket (1); a second protruding structure (5) being provided on the end surface of the second vibration damper (3) in contact with the second bracket (2), the second protruding structure (5) being configured to reduce the contact area between the second vibration damper (3) and the second bracket (2); A connecting member (6), the connecting member (6) passes through the first bracket (1), the second vibration damping member (3), and the second bracket (2) in sequence; the vibration damping device comprises an elastic member (7), the elastic member (7) passes between the connecting member (6) and the second vibration damping member (3), the elastic member (7) is configured to support the first bracket (1) and the second bracket (2), and to buffer and absorb vibration energy between the first bracket (1) and the second bracket; the projections of the first protruding structure (4) and the second protruding structure (5) along the axial direction of the second vibration damping member (3) do not overlap; A first fixing plate (8) is provided between the second vibration damping member (3) and the first bracket (1), and a second fixing plate (10) is provided between the second vibration damping member (3) and the second bracket (2). In an initial state when the motor is not running, the overall thickness of the second vibration damping member (3) is the distance between the first fixing plate (8) and the second fixing plate (10) after the elastic member (7) is compressed. The elastic member (7) is compressed by the gravity of the motor, and the elastic member (7) plays a role in supporting the motor while protecting the second vibration damping member (3) from being in a non-compressed and deformed state.

2. The vibration reduction device according to claim 1, characterized in that: The first fixing plate (8) is provided with a first fixing hole (9), and the first fixing hole (9) is configured to accommodate and fix the end of the elastic member (7); the second fixing plate (10) is provided with a second fixing hole (11), and the second fixing hole (11) is configured to accommodate and fix the end of the elastic member (7).

3. The vibration reduction device according to claim 2, characterized in that: The first fixing plate (8) is connected to the first bracket (1) via a second connecting member (12); and the second fixing plate (10) is connected to the second bracket (2) via a second connecting member (12).

4. The vibration reduction device according to claim 1, characterized in that: The vibration damping device further comprises a first vibration damping member (13), the first vibration damping member (13) being arranged on a side of the first bracket (1) away from the second vibration damping member (3), the first bracket (1) being provided with a first connecting hole (14), one end of the first vibration damping member (13) extending into the first connecting hole (14), the connecting member (6) passing through the first vibration damping member (13), and the first vibration damping member (13) being configured to enable the first bracket (1) to be in non-direct contact with the connecting member (6).

5. The vibration reduction device according to claim 4, characterized in that: A third protruding structure (15) is provided on the end surface of the first vibration damping member (13) in contact with the first bracket (1), and the third protruding structure (15) is configured to reduce the contact area between the first vibration damping member (13) and the first bracket (1).

6. The vibration reduction device according to claim 4, characterized in that: A first baffle (16) is provided at the end of the first vibration damper (13) away from the first bracket (1); the connecting member (6) passes through the first baffle (16) and then penetrates into the first vibration damper (13); a fourth protrusion structure (17) is provided on the end surface of the first vibration damper (13) in contact with the first baffle (16); the fourth protrusion structure (17) is configured to reduce the contact area between the first vibration damper (13) and the first baffle (16).

7. The vibration reduction device according to any one of claims 4 to 6, characterized in that: The first vibration damping member (13) comprises a stepped member (18) and an annular member (19); the stepped member (18) and the annular member (19) have different vibration damping energies; the minimum outer diameter of the stepped member (18) is equal to the diameter of the first connecting hole (14); the inner diameter of the annular member (19) is equal to the diameter of the first connecting hole (14); and the annular member (19) is sleeved on the stepped member (18).

8. The vibration reduction device according to claim 1, characterized in that: The vibration damping device further comprises a third vibration damping member (20), wherein the third vibration damping member (20) is arranged on a side of the second bracket (2) away from the second vibration damping member (3), the second bracket (2) is provided with a second connecting hole (21), one end of the third vibration damping member (20) extends into the second connecting hole (21), the connecting member (6) contacts the second bracket (2) through the third vibration damping member (20), and the third vibration damping member (20) is configured to make the second bracket (2) and the connecting member (6) non-directly contact each other.

9. The vibration reduction device according to claim 8, characterized in that: A fifth protrusion structure (22) is provided on the end surface of the third vibration damping member (20) in contact with the second bracket (2), and the fifth protrusion structure (22) is configured to reduce the contact area between the third vibration damping member (20) and the second bracket (2).

10. The vibration reduction device according to claim 8, characterized in that: A second baffle (23) is provided at the end of the third vibration damper (20) away from the second bracket (2); after the connecting member (6) passes through the third vibration damper (20), it passes through the second baffle (23); a sixth protrusion structure (24) is provided on the end surface of the third vibration damper (20) in contact with the second baffle (23); the sixth protrusion structure (24) is configured to reduce the contact area between the third vibration damper (20) and the second baffle (23).

11. The vibration reduction device according to any one of claims 8 to 9, characterized in that: The third vibration damping member (20) comprises a stepped member (18) and an annular member (19); the stepped member (18) and the annular member (19) have different vibration damping energies; the minimum outer diameter of the stepped member (18) is equal to the diameter of the second connecting hole (21); the inner diameter of the annular member (19) is equal to the diameter of the second connecting hole (21); and the annular member (19) is sleeved on the stepped member (18).

12. The vibration reduction device according to any one of claims 1 to 11, characterized in that: When the second vibration damper (3) includes a first protruding structure (4), the first protruding structure (4) is a convex strip structure extending radially along the second vibration damper (3); and / or, when the second vibration damper (3) includes a second protruding structure (5), the second protruding structure (5) is a convex strip structure extending radially along the second vibration damper (3); and / or, when the first vibration damper (13) includes a third protruding structure (15), the third protruding structure (15) is a convex strip structure extending radially along the first vibration damper (13); and / or, when the first vibration damper (13) includes a third protruding structure (15), the third protruding structure (15) is a convex strip structure extending radially along the first vibration damper (13); When a vibration damper (13) includes a fourth protrusion structure (17), the fourth protrusion structure (17) is a convex strip structure extending radially along the first vibration damper (13); and / or, when a third vibration damper (20) includes a fifth protrusion structure (22), the fifth protrusion structure (22) is a convex strip structure extending radially along the third vibration damper (20); and / or, when the third vibration damper (20) includes a sixth protrusion structure (24), the sixth protrusion structure (24) is a convex strip structure extending radially along the third vibration damper (20).

13. A motor suspension system, characterized in that: A vibration reduction device as claimed in any one of claims 1 to 12 is used.

14. An electric vehicle, characterized in that: A vibration reduction device as claimed in any one of claims 1 to 12 is used.

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