Electric damping device and vehicle

Abstract

A vehicle, comprising an electric damping device. The electric damping device comprises a first lead screw assembly, a second lead screw assembly, a first electric motor assembly and a second electric motor assembly. The first lead screw assembly is connected to the second lead screw assembly. The first electric motor assembly is in limiting fit with the first lead screw assembly, and the second electric motor assembly is in limiting fit with the second lead screw assembly.

Description

Electric vibration damping device and vehicle

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This disclosure claims priority to Chinese patent application number 202410263089.4, filed with the State Intellectual Property Office of China on March 8, 2024, entitled “Electric Vibration Damping Device and Vehicle,” the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present disclosure relates to the field of vehicle technology, and in particular to an electric vibration damping device and a vehicle. Background Art

[0004] In the related art, electric vibration reduction devices usually use a group of motor components and a group of screw components to achieve the vibration reduction effect. Since the damping value provided by the motor component is limited, it is difficult to achieve a good vibration reduction effect when the vehicle vibrates greatly.

[0005] Public content

[0006] The present disclosure aims to address at least one of the technical problems existing in the prior art. To this end, the present disclosure proposes an electric vibration reduction device that can flexibly control the damping level of the electric vibration reduction device, thereby absorbing and buffering vibration energy to a greater extent. Furthermore, the first and second screw rod assemblies are arranged vertically, which is more rational and achieves better vibration reduction effects.

[0007] The present disclosure further provides a vehicle.

[0008] According to an electric vibration damping device disclosed herein, the device includes: a first screw assembly and a second screw assembly, the first screw assembly being connected to the second screw assembly; a first motor assembly and a second motor assembly, one of the first motor assembly and the second motor assembly being suitable for connection to a vehicle body, and the other of the first motor assembly and the second motor assembly being suitable for connection to a wheel of the vehicle, the first motor assembly being matched with the first screw assembly, and the second motor assembly being matched with the second screw assembly.

[0009] According to an electric vibration reduction device disclosed in the present invention, by controlling the coordination between the first motor assembly and the first screw assembly, as well as the coordination between the second motor assembly and the second screw assembly, the damping size on the electric vibration reduction device can be flexibly controlled, and the vibration energy can be absorbed and buffered to a greater extent. In addition, the first screw assembly and the second screw assembly are arranged up and down, which is more reasonable and achieves a better vibration reduction effect.

[0010] In some examples of the present disclosure, the first screw rod assembly includes: a first base body, a first upper screw rod and a second upper screw rod, the first base body is in transmission cooperation with the first upper screw rod to rotate and move the first upper screw rod, the first upper screw rod is in transmission cooperation with the second upper screw rod to move the second upper screw rod up and down, and the first motor assembly is used to drive the first upper screw rod; the second screw rod assembly includes: a second base body, a first lower screw rod and a second lower screw rod, the second base body is in transmission cooperation with the first lower screw rod to rotate and move the first lower screw rod, the first lower screw rod is in transmission cooperation with the second lower screw rod to move the second lower screw rod up and down, the upper end of the second lower screw rod is connected to the lower end of the second upper screw rod, and the second motor assembly is used to drive the first lower screw rod.

[0011] In some examples of the present disclosure, the first screw assembly also includes: a first upper ball, the first seat body is provided with a first upper ball groove, the first upper screw is provided with a second upper ball groove, the first upper ball groove and the second upper ball groove define a first upper rolling space, and the first upper ball is provided and fitted in the first upper rolling space.

[0012] In some examples of the present disclosure, the second screw assembly also includes: a first lower ball, the second seat body is provided with a first lower ball groove, the first lower screw is provided with a second lower ball groove, the first lower ball groove and the second lower ball groove define a first lower rolling space, and the first lower ball is provided and cooperates in the first lower rolling space.

[0013] In some examples of the present disclosure, there are a plurality of first upper ball grooves, and the plurality of first upper ball grooves are arranged in the vertical direction of the first seat body; there are a plurality of second upper ball grooves, and the plurality of second upper ball grooves are arranged in the vertical direction of the first upper screw rod; the plurality of first upper ball grooves selectively define the first upper rolling space with the plurality of second upper ball grooves;

[0014] There are multiple first lower ball grooves, and the multiple first lower ball grooves are arranged in the upper and lower directions of the second seat body. There are multiple second lower ball grooves, and the multiple second lower ball grooves are arranged in the upper and lower directions of the first lower screw rod. The multiple first lower ball grooves selectively define the first lower rolling space with the multiple second lower ball grooves.

[0015] In some examples of the present disclosure, the first screw assembly also includes: a first upper retaining ring, the first upper retaining ring is arranged on the first seat body, and the first upper retaining ring is located below the multiple first upper ball grooves; the second screw assembly also includes: a first lower retaining ring, the first lower retaining ring is arranged on the second seat body, and the first lower retaining ring is located above the multiple first lower ball grooves.

[0016] In some examples of the present disclosure, the first screw rod assembly also includes: a second upper ball, the first upper screw rod is also provided with a third upper ball groove, the second upper screw rod is provided with a fourth upper ball groove, the third upper ball groove and the fourth upper ball groove define a second upper rolling space, the second upper ball is provided in the second upper rolling space, so that when the first upper screw rod rotates, the second upper screw rod is driven up and down by the second upper ball; the second screw rod assembly also includes: a second lower ball, the first lower screw rod is also provided with a third lower ball groove, the second lower screw rod is provided with a fourth lower ball groove, the third lower ball groove and the fourth lower ball groove define a second lower rolling space, the second lower ball is provided in the second lower rolling space, so that when the first lower screw rod rotates, the second lower screw rod is driven up and down by the second lower ball.

[0017] In some examples of the present disclosure, there are multiple third upper ball grooves, and multiple third upper ball grooves are arranged in the upper and lower directions of the first upper screw rod; there are multiple fourth upper ball grooves, and multiple fourth upper ball grooves are arranged in the upper and lower directions of the second upper screw rod; multiple third upper ball grooves selectively define the second upper rolling space with multiple fourth upper ball grooves; there are multiple third lower ball grooves, and multiple third lower ball grooves are arranged in the upper and lower directions of the first lower screw rod; there are multiple fourth lower ball grooves, and multiple fourth lower ball grooves are arranged in the upper and lower directions of the second lower screw rod; multiple third lower ball grooves selectively define the second lower rolling space with multiple fourth lower ball grooves.

[0018] In some examples of the present disclosure, the first screw assembly also includes: a second upper retaining ring, which is arranged on the first upper screw, and the second upper retaining ring is located below the multiple third upper ball grooves; the second screw assembly also includes: a second lower retaining ring, which is arranged on the first lower screw, and the second lower retaining ring is located above the multiple third lower ball grooves.

[0019] In some examples of the present disclosure, a direction of threads on the second upper screw rod is the same as a direction of threads on the second lower screw rod.

[0020] In some examples of the present disclosure, the first motor assembly includes: a first inner coil and a first permanent magnet, the first permanent magnet being disposed on the first upper screw rod, and when the first inner coil is energized, the first permanent magnet and the first upper screw rod rotate;

[0021] The second motor assembly includes: a second inner coil and a second permanent magnet. The second permanent magnet is arranged on the first lower screw rod. After the second inner coil is energized, the second permanent magnet and the first lower screw rod rotate.

[0022] In some examples of the present disclosure, the electric vibration reduction device further includes: a housing, the first screw assembly and the first motor assembly are both disposed in the housing, and the second screw assembly and the second motor assembly are both disposed in the housing.

[0023] In some examples of the present disclosure, the shell includes: a cylinder, an upper support plate and a lower support plate, the upper support plate is movably arranged at the upper end of the cylinder, the first inner coil and the first seat are respectively connected to the side of the upper support plate facing the inside of the cylinder, the lower support plate is movably arranged at the lower end of the cylinder, and the second inner coil and the second seat are respectively connected to the side of the lower support plate facing the inside of the cylinder.

[0024] In some examples of the present disclosure, the electric vibration reduction device also includes: a buffer member, wherein there is one buffer member, and the buffer member is arranged at the connection between the second upper screw rod and the second lower screw rod; or there are two buffer members, one of the two buffer members is arranged on the side of the upper support plate facing the first upper screw rod, and the other of the two buffer members is arranged on the side of the lower support plate facing the first lower screw rod.

[0025] In some examples of the present disclosure, the electric vibration reduction device also includes: a first guide member and a second guide member, the upper end of the second upper screw rod is provided with a first guide groove, the lower end of the second lower screw rod is provided with a second guide groove, the upper end of the first guide member is connected to the upper support plate, and the lower end of the first guide member is engaged in the first guide groove, the lower end of the second guide member is connected to the lower support plate, and the upper end of the second guide member is engaged in the second guide groove.

[0026] In some examples of the present disclosure, the cross-section of the lower end of the first guide member is configured as any one of a semicircle, a triangle, and a rectangle, and the cross-section of the upper end of the second guide member is configured as any one of a semicircle, a triangle, and a rectangle.

[0027] A vehicle according to the present disclosure includes the electric vibration reduction device described above.

[0028] Additional aspects and advantages of the present disclosure will be given in part in the description that follows and, in part, will be obvious from the description that follows, or will be learned through practice of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The above and / or additional aspects and advantages of the present disclosure will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0030] FIG1 is a schematic diagram of a first structure of an electric vibration reduction device according to an embodiment of the present disclosure;

[0031] FIG2 is a schematic diagram of a second structure of an electric vibration reduction device according to an embodiment of the present disclosure;

[0032] FIG3 is a schematic block diagram of a vehicle according to an embodiment of the present disclosure.

[0033] 1. The electric vibration reduction device; 10. The shell; 11. The cylinder; 12. The upper support plate; 13. The lower support plate; 20. The first screw rod assembly; 21. The first seat body; 211. The first upper ball groove; 22. The first upper screw rod; 221. The second upper ball groove; 222. The third upper ball groove; 23. The second upper screw rod; 231. The fourth upper ball groove; 24. The first upper ball; 25. The first upper retaining ring; 26. The second upper ball; 27. The second upper retaining ring; 30. The second screw rod assembly; 31. The second seat body; 311. The first lower ball groove; 32. The first lower screw rod; 321. The second lower ball groove; 322. The third lower ball groove; 33. The second lower screw rod; 331. The fourth lower ball groove; 34. The first lower ball; 35. The first Lower retaining ring; 36, second lower ball; 37, second lower retaining ring; 40, first motor assembly; 41, first inner coil; 42, first permanent magnet; 50, second motor assembly; 51, second inner coil; 52, second permanent magnet; 60, buffer; 70, first guide; 80, second guide; 100, vehicle; 101, first upper rolling space; 102, first lower rolling space; 201, second upper rolling space; 202, second lower rolling space; 301, first guide groove; 302, second guide groove. DETAILED DESCRIPTION

[0034] Embodiments of the present disclosure are described in detail below, and the embodiments described with reference to the accompanying drawings are exemplary.

[0035] An electric vibration reduction device 1 according to an embodiment of the present disclosure is described below with reference to FIG1 and FIG2 . The electric vibration reduction device 1 is generally provided on a vehicle to cushion and reduce vibrations of the vehicle to improve the vehicle's running stability and riding comfort.

[0036] As shown in Figures 1 and 2, the electric vibration reduction device 1 according to an embodiment of the present disclosure includes a first screw assembly 20, a second screw assembly 30, a first motor assembly 40, and a second motor assembly 50. The first screw assembly 20 and the second screw assembly 30 primarily function as a transmission, while the first motor assembly 40 and the second motor assembly 50 primarily function as a damping device.

[0037] As shown in Figures 1 and 2, the first screw assembly 20 is connected to the second screw assembly 30. The first screw assembly 20 and the second screw assembly 30 are connected so that the first screw assembly 20 can better cooperate with the second screw assembly 30, thereby better absorbing and cushioning the vibration of the vehicle. It should be noted that the first screw assembly 20 is located above the second screw assembly 30, and the first screw assembly 20 can cooperate with the vehicle body, and the second screw assembly 30 can cooperate with the axle position.

[0038] As shown in Figures 1 and 2, one of the first motor assembly 40 and the second motor assembly 50 is adapted to be connected to the vehicle body, and the other of the first motor assembly 40 and the second motor assembly 50 is adapted to be connected to the wheel. The first motor assembly 40 is positionally engaged with the first screw assembly 20, and the second motor assembly 50 is positionally engaged with the second screw assembly 30.

[0039] For example, the first motor assembly 40 is connected to the vehicle body, and the second motor assembly 50 is connected to the wheel. In this way, when the wheel shakes in the vertical direction, the second motor assembly 50 and the first motor assembly 40 can buffer and absorb the wheel shaking, thereby keeping the vehicle body relatively stable.

[0040] It should be noted that the electric shock absorber 1 further includes a housing 10, with a first screw assembly 20 movably disposed within the housing 10. That is, the first screw assembly 20 is located within the housing 10, thereby protecting the first screw assembly 20 from the external environment and impurities. Furthermore, the first screw assembly 20 is movable within the housing 10, facilitating movement of the first screw assembly 20 when the wheel vibrates, thereby enabling the first screw assembly 20 to better cooperate with the first motor assembly 40. Similarly, the second screw assembly 30 is movably disposed within the housing 10. That is, the second screw assembly 30 is also located within the housing 10, thereby protecting the second screw assembly 30 from the external environment and impurities. Furthermore, the second screw assembly 30 is movable within the housing 10, thereby facilitating movement of the second screw assembly 30 when the wheel vibrates, thereby enabling the second screw assembly 30 to better cooperate with the second motor assembly 50.

[0041] The first screw assembly 20 and the second screw assembly 30 are symmetrically arranged in the up and down directions. It should be noted that the vibration direction of the vehicle is mainly in the up and down directions. The first screw assembly 20 and the second screw assembly 30 are symmetrically arranged in the up and down directions. This arrangement is more reasonable, the space utilization is more compact, and the layout is more flexible. When the vehicle is driving on a bumpy road, the wheels will move in the up and down directions. Since the second screw assembly 30 cooperates with the axle part, the second screw assembly 30 will produce up and down movement under the drive of the wheel. Because the second screw assembly 30 is connected to the first screw assembly 20, the movement of the second screw assembly 30 will be transmitted to the first screw assembly 20, so that the movement of the wheel can be finally transmitted to the vehicle body.

[0042] The first motor assembly 40 and the second motor assembly 50 are disposed within the housing 10, so that the housing 10 can protect them and prevent the external environment from affecting the operation of the first motor assembly 40 and the second motor assembly 50, thereby facilitating the cooperation between the first motor assembly 40 and the first screw assembly 20, and facilitating the cooperation between the second motor assembly 50 and the second screw assembly 30. It should be noted that the first motor assembly 40 and the second motor assembly 50 can both be composed of fixed components and movable components, wherein the movable components can move relative to the housing 10.

[0043] It should be noted that the first motor assembly 40 and the second motor assembly 50 can work independently or simultaneously.

[0044] Therefore, by independently controlling the coordination between the first motor assembly 40 and the first screw assembly 20 and the coordination between the second motor assembly 50 and the second screw assembly 30, the damping size on the electric vibration reduction device 1 can be flexibly controlled, and the vibration energy can be absorbed and buffered to a greater extent. In addition, the first screw assembly 20 and the second screw assembly 30 are arranged up and down, which is more reasonable and achieves a better vibration reduction effect.

[0045] In addition, as shown in Figures 1 and 2, the first screw rod assembly 20 includes a first base body 21, a first upper screw rod 22, and a second upper screw rod 23. The first base body 21 is in transmission cooperation with the first upper screw rod 22 to rotate and move the first upper screw rod 22. The first upper screw rod 22 is in transmission cooperation with the second upper screw rod 23 to drive the second upper screw rod 23 to move up and down. The first motor assembly 40 is used to drive the first upper screw rod 22. The second screw rod assembly 30 includes a second base body 31, a first lower screw rod 32, and a second lower screw rod 33. The second base body 31 is in transmission cooperation with the first lower screw rod 32 to drive the first lower screw rod 32 to rotate. The first lower screw rod 32 is in transmission cooperation with the second lower screw rod 33 to move up and down. The upper end of the second lower screw rod 33 is connected to the lower end of the second upper screw rod 23. The second motor assembly 50 is used to drive the first lower screw rod 32.

[0046] Among them, the first base body 21 mainly plays the role of installation, and other corresponding components can be installed on the first base body 21. The first upper screw rod 22 and the second upper screw rod 23 can both play the role of transmission. That is to say, the first base body 21 is located inside the shell 10, and the first base body 21 and the shell 10 can move relative to each other. The first base body 21 and the first upper screw rod 22 are in transmission cooperation to drive the first upper screw rod 22 to rotate. Specifically, when the wheel vibrates, the first base body 21 will move in the up and down directions. Since the first base body 21 and the first upper screw rod 22 are in transmission cooperation, the first base body 21 can make the first upper screw rod 22 rotate and move. The first upper screw rod 22 and the second upper screw rod 23 are in transmission cooperation, so that the rotation of the first upper screw rod 22 can drive the second upper screw rod 23 to move up and down, so that the vibration of the wheel can be absorbed by the up and down movement of the second upper screw rod 23, thereby achieving vibration reduction.

[0047] The first motor assembly 40 is limitedly matched with the first upper screw rod 22, that is, the first motor assembly 40 can drive the movement of the first upper screw rod 22, and the movement direction of the first upper screw rod 22 can be adjusted by adjusting the rotation direction of the first motor assembly 40, thereby providing a buffering and vibration reduction effect on the vehicle.

[0048] Similarly, the second base body 31 mainly plays a role of installation, and other corresponding components can be installed on the second base body 31. The first lower screw rod 32 and the second lower screw rod 33 can both play a role of transmission. The second base body 31 is located inside the shell 10, and the second base body 31 and the shell 10 can move relative to each other. The second base body 31 and the first lower screw rod 32 are in transmission cooperation to drive the first lower screw rod 32 to rotate and move. Specifically, when the wheel vibrates, the second base body 31 will move in the up and down directions. Since the second base body 31 and the first lower screw rod 32 are in transmission cooperation, the second base body 31 can drive the first lower screw rod 32 to rotate. The first lower screw rod 32 and the second lower screw rod 33 are in transmission cooperation, so that the rotation of the first lower screw rod 32 can drive the second lower screw rod 33 to move up and down, so that the vibration of the wheel can be absorbed by the up and down movement of the second lower screw rod, thereby achieving vibration reduction. It should be noted that the adjacent ends of the second upper screw rod 23 and the second lower screw rod 33 are fixedly connected.

[0049] The second motor assembly 50 is limitedly engaged with the first lower screw rod 32, that is, the second motor assembly 50 can hinder the movement of the first lower screw rod 32. In this way, when the first lower screw rod 32 moves, the second motor assembly 50 will generate resistance to the movement of the first lower screw rod 32, thereby reducing the movement amplitude of the first lower screw rod 32, thereby playing a role in buffering and reducing vibrations for the vehicle.

[0050] In addition, as shown in Figures 1 and 2, the first screw assembly 20 further includes a first upper ball 24, the first base 21 is provided with a first upper ball groove 211, the first upper screw 22 is provided with a second upper ball groove 221, the first upper ball groove 211 and the second upper ball groove 221 define a first upper rolling space 101, and the first upper ball 24 is disposed and engaged in the first upper rolling space 101. The second screw assembly 30 further includes a first lower ball 34, the second base 31 is provided with a first lower ball groove 311, the first lower screw 32 is provided with a second lower ball groove 321, the first lower ball groove 311 and the second lower ball groove 321 define a first lower rolling space 102, and the first lower ball 34 is disposed and engaged in the first lower rolling space 102.

[0051] Among them, the first upper ball 24 mainly plays a role in transmission. The first upper ball groove 211 and the second upper ball groove 221 can both serve as installation. The first upper ball groove 211 is set on the first base 21, and the second upper ball groove 221 is set on the first upper screw rod 22. In this way, a first upper rolling space 101 can be formed between the first upper ball groove 211 and the second upper ball groove 221, and the first upper ball 24 can be set in the first upper rolling space 101. Specifically, when the first base 21 moves up and down, the first upper ball 24 will move in the first upper rolling space 101, thereby driving the first upper screw rod 22 to rotate. In this way, the up and down movement of the first base 21 can be converted into the rotation of the first upper screw rod 22. Similarly, when the first upper screw rod rotates, the first upper ball 24 can cause the first base 21 and the first upper screw rod 22 to move.

[0052] Similarly, the first lower ball 34 primarily serves as a transmission mechanism. Both the first lower ball groove 311 and the second lower ball groove 321 can serve as mounting mechanisms. The first lower ball groove 311 is disposed on the second seat 31, while the second lower ball groove 321 is disposed on the first lower screw rod 32. Thus, a first lower rolling space 102 is formed between the first lower ball groove 311 and the second lower ball groove 321, and the first lower ball 34 can be disposed within the first lower rolling space 102. Specifically, when the second seat 31 moves up and down, the first lower ball 34 moves within the first lower rolling space 102, thereby driving the first lower screw rod 32 to rotate. Thus, the up and down movement of the second seat 31 can be converted into the rotation of the first lower screw rod 32. Similarly, when the first lower screw rod 32 rotates, the first lower ball 34 can cause the second seat 31 and the first lower screw rod 32 to move.

[0053] Furthermore, as shown in Figures 1 and 2, there are a plurality of first upper ball rolling grooves 211, which are arranged in the vertical direction of the first seat body 21. There are a plurality of second upper ball rolling grooves 221, which are arranged in the vertical direction of the first upper screw rod 22. The plurality of first upper ball rolling grooves 211 selectively define the first upper rolling space 101 with the plurality of second upper ball rolling grooves 221. There are a plurality of first lower ball rolling grooves 311, which are arranged in the vertical direction of the second seat body 31. There are a plurality of second lower ball rolling grooves 321, which are arranged in the vertical direction of the first lower screw rod 32. The plurality of first lower ball rolling grooves 311 selectively define the first lower rolling space 102 with the plurality of second lower ball rolling grooves 321.

[0054] The plurality of first upper ball grooves 211 are provided, thereby providing a longer moving space for the first upper ball 24 within the first upper ball grooves 211. The plurality of first upper ball grooves 211 are arranged in the vertical direction of the first seat body 21. It is understood that when the wheel vibrates, the first seat body 21 primarily moves in the vertical direction. The plurality of first upper ball grooves 211 are arranged in the vertical direction of the first seat body 21, thereby providing a longer moving space for the first upper ball 24 in the vertical direction.

[0055] Similarly, a plurality of second upper ball grooves 221 are provided, which can further provide a longer moving space for the first upper ball 24 in the second upper ball grooves 221. The plurality of second upper ball grooves 221 are arranged in the vertical direction of the first upper screw rod 22. It can be understood that this can provide a longer moving space for the first upper ball 24 in the vertical direction.

[0056] Specifically, when the first base 21 moves up and down, the first base 21 drives the plurality of first upper ball grooves 211 to move in the up and down direction. As the plurality of first upper ball grooves 211 move up and down, the plurality of first upper ball grooves 211 selectively cooperate with the plurality of second upper ball grooves 221 to define the first upper rolling space 101. Since the first upper rolling space 101 changes with the movement of the first base 21, the first upper balls 24 can move within the first upper rolling space 101, thereby driving the movement of the first upper screw rod 22. For example, when the first base 21 moves downward, the plurality of first upper ball grooves 211 also move downward. As the plurality of first upper ball grooves 211 move downward, they gradually cooperate with the plurality of second upper ball grooves 221 to define the first upper rolling space 101. As a result, the first upper balls 24 located within the first upper rolling space 101 can convert the up and down movement of the first base 21 into rotation of the first upper screw rod 22. In this way, the moving distance of the first base body 21 in the up-down direction can be increased accordingly, thereby being able to withstand vibrations of greater magnitude.

[0057] The plurality of first lower ball grooves 311 are provided, thereby providing a longer moving space for the first lower ball 34 within the first lower ball grooves 311. The plurality of first lower ball grooves 311 are arranged in the vertical direction of the second seat body 31. It is understood that when the wheel vibrates, the second seat body 31 primarily moves in the vertical direction. The plurality of first lower ball grooves 311 are arranged in the vertical direction of the second seat body 31, thereby providing a longer moving space for the first lower ball 34 in the vertical direction.

[0058] Similarly, a plurality of second lower ball grooves 321 are provided, which can further provide a longer moving space for the first lower ball 34 in the second lower ball grooves 321. The plurality of second lower ball grooves 321 are arranged in the vertical direction of the first lower screw rod 32. It can be understood that this can provide a longer moving space for the first lower ball 34 in the vertical direction.

[0059] Specifically, the second base 31 drives the plurality of first lower ball grooves 311 to move vertically. As the plurality of first lower ball grooves 311 move vertically, the plurality of first lower ball grooves 311 selectively engage with the plurality of second lower ball grooves 321 to define the first lower rolling space 102. Because the first lower rolling space 102 changes with the movement of the second base 31, the first lower balls 34 can move within the first lower rolling space 102, thereby driving the first lower screw rod 32 to move. For example, as the second base 31 moves upward, the plurality of first lower ball grooves 311 also move upward. As the plurality of first lower ball grooves 311 move upward, they gradually engage with the plurality of second lower ball grooves 321 to define the first lower rolling space 102. Consequently, the first lower balls 34 within the first lower rolling space 102 can convert the vertical movement of the second base 31 into rotation of the first lower screw rod 32. In this way, the moving distance of the second base body 31 in the up-down direction can be increased accordingly, thereby being able to withstand vibrations of greater magnitude.

[0060] 1 and 2 , the first screw assembly 20 further includes a first upper retaining ring 25, which is disposed on the first base 21 and is located below the plurality of first upper ball grooves 211. The second screw assembly 30 further includes a first lower retaining ring 35, which is disposed on the second base 31 and is located above the plurality of first lower ball grooves 311.

[0061] The first upper retaining ring 25 mainly serves as a position limiter. The first upper retaining ring 25 is arranged on the first base 21, so that the position of the first upper retaining ring 25 can be fixed, making the arrangement of the first upper retaining ring 25 more secure and stable, and the first upper retaining ring 25 can better perform the position limiting work. Specifically, the first upper retaining ring 25 is located below the plurality of first upper ball grooves 211. In this way, the first upper retaining ring 25 can limit the first upper balls 24 located in the first upper rolling space 101, preventing the first upper balls 24 from being separated from the first upper rolling space 101, and allowing the first screw assembly 20 to work better.

[0062] Similarly, the first lower retaining ring 35 primarily serves as a position limiter. Positioning the first lower retaining ring 35 on the second base 31 secures the position of the first lower retaining ring 35, making the placement of the first lower retaining ring 35 more secure and stable, and enabling the first lower retaining ring 35 to better perform its position limiting function. Specifically, the first lower retaining ring 35 is positioned above the plurality of first lower ball grooves 311 . This allows the first lower retaining ring 35 to position the first lower balls 34 within the first lower rolling space 102 , preventing the first lower balls 34 from disengaging from the first lower rolling space 102 and enabling the second screw assembly 30 to function more effectively.

[0063] In addition, as shown in Figures 1 and 2, the first screw assembly 20 further includes a second upper ball 26, the first upper screw 22 is further provided with a third upper ball groove 222, and the second upper screw 23 is provided with a fourth upper ball groove 231. The third upper ball groove 222 and the fourth upper ball groove 231 define a second upper rolling space 201. The second upper ball 26 is provided in the second upper rolling space 201 so that when the first upper screw 22 rotates, the second upper screw 2 is driven by the second upper ball 26. 3 moves up and down; the second screw rod assembly 30 also includes a second lower ball 36, the first lower screw rod 32 is further provided with a third lower ball groove 322, and the second lower screw rod 33 is provided with a fourth lower ball groove 331. The third lower ball groove 322 and the fourth lower ball groove 331 define a second lower rolling space 202. The second lower ball 36 is arranged in the second lower rolling space 202, so that when the first lower screw rod 32 rotates, the second lower ball 36 drives the second lower screw rod 33 to move up and down.

[0064] Among them, the second upper ball 26 mainly plays a transmission role. The third upper ball groove 222 and the fourth upper ball groove 231 can both serve as a mounting function. The third upper ball groove 222 is arranged on the first upper screw rod 22, and the fourth upper ball groove 231 is arranged on the second upper screw rod 23. In this way, the third upper ball groove 222 and the fourth upper ball groove 231 can form a second upper rolling space 201, and the second upper ball 26 can be arranged in the second upper rolling space 201. Specifically, when the first upper screw rod 22 rotates, the second upper ball 26 will move in the second upper rolling space 201, thereby driving the second upper screw rod 23 to move. In this way, the rotation of the first upper screw rod 22 can be converted into the up and down movement of the second upper screw rod 23. It should be noted that the movement direction of the first base body 21 is opposite to the movement direction of the second upper screw rod 23.

[0065] Similarly, the second lower ball bearing 36 primarily serves as a transmission mechanism. Both the third lower ball bearing groove 322 and the fourth lower ball bearing groove 331 can serve as mounting mechanisms. The third lower ball bearing groove 322 is disposed on the first lower screw rod 32, while the fourth lower ball bearing groove 331 is disposed on the second lower screw rod 33. Thus, the third lower ball bearing groove 322 and the fourth lower ball bearing groove 331 can form a second lower rolling space 202, within which the second lower ball bearing 36 can be disposed. Specifically, when the first lower screw rod 32 rotates, the second lower ball bearing 36 moves within the second lower rolling space 202, thereby driving the second lower screw rod 33 to move. Thus, the rotation of the first lower screw rod 32 is converted into the up and down movement of the second lower screw rod 33. It should be noted that the movement direction of the second seat body 31 is opposite to that of the second lower screw rod 33.

[0066] Further, as shown in Figures 1 and 2, there are multiple third upper ball grooves 222, and multiple third upper ball grooves 222 are arranged in the upper and lower directions of the first upper screw rod 22, there are multiple fourth upper ball grooves 231, and multiple fourth upper ball grooves 231 are arranged in the upper and lower directions of the second upper screw rod 23. When the first upper screw rod 22 rotates, the multiple third upper ball grooves 222 selectively define the second upper rolling space 201 with the multiple fourth upper ball grooves 231. There are multiple third lower ball grooves 322, and multiple third lower ball grooves 322 are arranged in the upper and lower directions of the first lower screw rod 32. There are multiple fourth lower ball grooves 331, and multiple fourth lower ball grooves 331 are arranged in the upper and lower directions of the second lower screw rod 33. When the first lower screw rod 32 rotates, the multiple third lower ball grooves 322 selectively define the second lower rolling space 202 with the multiple fourth lower ball grooves 331.

[0067] The third upper ball groove 222 is provided in a plurality, thereby providing a longer moving space for the second upper ball 26 in the third upper ball groove 222. Specifically, the plurality of third upper ball grooves 222 are arranged in an up-down direction of the first upper screw rod 22, thereby providing a longer moving space for the second upper ball 26 in the up-down direction.

[0068] Similarly, a plurality of fourth upper ball grooves 231 are provided, which can provide a longer moving space for the second upper ball 26 in the fourth upper ball grooves 231. Specifically, the plurality of fourth upper ball grooves 231 are arranged in the vertical direction of the second upper screw rod 23, which can provide a longer moving space for the second upper ball 26 in the vertical direction.

[0069] Specifically, when the first upper screw rod 22 rotates, the plurality of third upper ball grooves 222 selectively engage with the plurality of fourth upper ball grooves 231 to define the second upper rolling space 201, thereby allowing the second upper balls 26 to move within the second upper rolling space 201, thereby driving the second upper screw rod 23 to move. This increases the travel distance of the second upper screw rod 23. Since the second upper screw rod 23 moves in opposite directions to the first base body 21, the overall vertical dimension of the first screw rod assembly 20 can be reduced, facilitating installation.

[0070] The third lower ball groove 322 is provided in a plurality, thereby providing a longer moving space for the second lower ball 36 in the third lower ball groove 322. Specifically, the plurality of third lower ball grooves 322 are arranged in an up-down direction of the first lower screw rod 32, thereby providing a longer moving space for the second lower ball 36 in the up-down direction.

[0071] Similarly, a plurality of fourth upper ball grooves 231 are provided, which can provide a longer moving space for the second lower ball 36 in the fourth upper ball grooves 231. Specifically, the plurality of fourth upper ball grooves 231 are arranged in the vertical direction of the second lower screw rod 33, which can provide a longer moving space for the second lower ball 36 in the vertical direction.

[0072] Specifically, when the first lower screw rod 32 rotates, the plurality of third lower ball grooves 322 selectively engage with the plurality of fourth lower ball grooves 331 to define the second lower rolling space 202. As a result, the second lower balls 36 can move within the second lower rolling space 202, thereby driving the second lower screw rod 33 to move. This increases the travel distance of the second lower screw rod 33. Since the second lower screw rod 33 moves in opposite directions to the second base body 31, the overall vertical dimension of the second screw rod assembly 30 can be reduced, facilitating installation.

[0073] In addition, as shown in Figures 1 and 2, the first screw assembly 20 also includes a second upper retaining ring 27, which is arranged on the first upper screw 22, and the second upper retaining ring 27 is located below the multiple third upper ball grooves 222. The second screw assembly 30 also includes a second lower retaining ring 37, which is arranged on the first lower screw 32, and the second lower retaining ring 37 is located above the multiple third lower ball grooves 322.

[0074] The second upper retaining ring 27 mainly serves as a position limiter. The second upper retaining ring 27 is arranged on the first upper screw rod 22, so that the position of the second upper retaining ring 27 can be fixed, making the arrangement of the second upper retaining ring 27 more secure and stable, and the second upper retaining ring 27 can better perform the position limiting work. Specifically, the second upper retaining ring 27 is located below the plurality of third upper ball grooves 222. In this way, the second upper retaining ring 27 can limit the second upper ball 26 located in the second upper rolling space 201, preventing the second upper ball 26 from being separated from the second upper rolling space 201, so that the first screw rod assembly 20 can work better.

[0075] Similarly, the second lower retaining ring 37 primarily serves as a position limiter. Arranging the second lower retaining ring 37 on the first lower screw rod 32 secures the position of the second lower retaining ring 37, making the arrangement of the second lower retaining ring 37 more secure and stable, and enabling the second lower retaining ring 37 to better perform its position limiter function. Specifically, the second lower retaining ring 37 is positioned above the plurality of third lower ball grooves 322 . This allows the second lower retaining ring 37 to position the second lower balls 36 within the second lower rolling space 202 , preventing the second lower balls 36 from disengaging from the second lower rolling space 202 and enabling the second screw rod assembly 30 to function more effectively.

[0076] In addition, the thread direction on the second upper screw rod 23 is the same as the thread direction on the second lower screw rod 33. It should be noted that when the wheel vibrates, for example, when the second base body 31 moves upward under the influence of the wheel vibration, the first lower screw rod 32 will have a counterclockwise rotation tendency through the transmission cooperation between the first lower rolling space 102 and the first lower ball 34. The second lower screw rod 33 will also have a counterclockwise rotation tendency through the transmission cooperation between the second lower rolling space 202 and the second lower ball 36. At the same time, the first base body 21 has a downward movement tendency, so that the first upper screw rod 22 will have a clockwise rotation tendency through the transmission cooperation between the first upper rolling space 101 and the first upper ball 24. The second upper screw rod 23 will also have a clockwise rotation tendency through the transmission cooperation between the second upper rolling space 201 and the second upper ball 26. In this way, the rotation direction of the second upper screw rod 23 is opposite to that of the first upper screw rod 22. Because the second upper screw rod 23 is fixedly connected to the second lower screw rod 33, the rotation tendencies of the second upper screw rod 23 and the second lower screw rod 33 can offset each other to a certain extent, thereby reducing the rotation tendencies of the second upper screw rod 23 and the second lower screw rod 33, so that the second upper screw rod 23 and the second lower screw rod 33 can work better.

[0077] Furthermore, as shown in Figures 1 and 2, the first motor assembly 40 includes a first inner coil 41 and a first permanent magnet 42. The first inner coil 41 is movably disposed in the housing 10, and the first permanent magnet 42 is disposed on the first upper screw rod 22. When the first inner coil 41 is energized, the first permanent magnet 42 and the first upper screw rod 22 rotate. The second motor assembly 50 includes a second inner coil 51 and a second permanent magnet 52. The second inner coil 51 is movably disposed in the housing 10, and the second permanent magnet 52 is disposed on the first lower screw rod 32. When the second inner coil 51 is energized, the second permanent magnet 52 and the first lower screw rod 32 rotate. This enables the first motor assembly 40 to drive the first upper screw rod 22, and the second motor assembly 50 to drive the first lower screw rod 32.

[0078] The contactless coordination between the first inner coil 41 and the first permanent magnet 42 and the first upper lead screw 22, as well as the contactless coordination between the second inner coil 51 and the second permanent magnet 52 and the first lower lead screw 32, prolongs the service life of the electric vibration damper 1 and provides faster response. Furthermore, the coordinated use of the first inner coil 41 and the second inner coil 51 provides a more flexible control strategy for complex operating conditions.

[0079] It should be noted that since the first motor assembly 40 and the second motor assembly 50 can be controlled separately, they can be set according to the size of the actual working conditions. For example, when the upper space size is larger, the first motor assembly 40 can be used as the main control, and when the lower space size is larger, the second motor assembly 50 can be used as the main control.

[0080] Specifically, as shown in Figures 1 and 2, the shell 10 includes a cylinder 11, an upper support plate 12 and a lower support plate 13. The upper support plate 12 can be movably arranged at the upper end of the cylinder 11, the first inner coil 41 and the first seat body 21 are respectively connected to the side of the upper support plate 12 facing the inside of the cylinder 11, the lower support plate 13 can be movably arranged at the lower end of the cylinder 11, and the second inner coil 51 and the second seat body 31 are respectively connected to the side of the lower support plate 13 facing the inside of the cylinder 11.

[0081] The cylinder 11 is the main body of the housing 10 and is primarily used to protect the components within the housing 10, preventing external dust and impurities from entering the housing 10 and affecting the normal use of the electric vibration damping device 1. The cylinder 11 may be made of a flexible material. The upper support plate 12 primarily serves as a support and mounting mechanism. The upper support plate 12 is movably disposed at the upper end of the cylinder 11, thereby facilitating connection and coordination between the upper support plate 12 and the vehicle body. The first inner coil 41 and the first seat 21 are respectively connected to the side of the upper support plate 12 facing the interior of the cylinder 11. This makes the arrangement of the first inner coil 41 and the first seat 21 more reasonable, facilitates their installation and arrangement, and makes the arrangement of the first inner coil 41 and the first seat 21 more secure and stable, thereby enabling the first inner coil 41 and the first seat 21 to function better.

[0082] Similarly, the lower support plate 13 also primarily serves a supporting and mounting function. The lower support plate 13 is positioned at the lower end of the cylinder 11 so that it can move up and down, thereby facilitating the connection and coordination between the lower support plate 13 and the axle. The second inner coil 51 and the second base 31 are respectively connected to the side of the lower support plate 13 facing inward from the cylinder 11. This further rationalizes the arrangement of the second inner coil 51 and the second base 31, facilitating their installation and placement. Furthermore, the arrangement of the second inner coil 51 and the second base 31 is made more secure and stable, allowing them to function better.

[0083] In addition, as shown in Figures 1 and 2, the electric vibration damping device 1 further includes a buffer member 60. The buffer member 60 is provided at the connection between the second upper screw rod 23 and the second lower screw rod 33. Alternatively, the buffer members 60 are provided at two locations, one of which is provided on the side of the upper support plate 12 facing the first upper screw rod 22, and the other of which is provided on the side of the lower support plate 13 facing the first lower screw rod 32. The size of the buffer member 60 can be adjusted according to actual working conditions.

[0084] Among them, the buffer 60 can play the role of buffering and limiting. The buffer 60 can be one. When the number of the buffer 60 is one, the buffer 60 is set at the connection between the second upper screw rod 23 and the second lower screw rod 33, that is, the second upper screw rod 23 and the second lower screw rod 33 share one buffer 60, which can make the setting of the buffer 60 more reasonable. Specifically, when the second upper screw rod 23 moves inward relative to the first upper screw rod 22, the buffer 60 will also follow and move in the direction of the first upper screw rod 22. When the buffer 60 contacts the first upper screw rod 22, the second upper screw rod 23 reaches the maximum displacement in the direction of the first upper screw rod 22, and the second upper screw rod 23 stops moving, thereby preventing the second upper screw rod 23 from continuing to move and causing damage to the first screw rod assembly 20, thereby avoiding affecting the normal use of the first screw rod assembly 20.

[0085] Similarly, when the second lower screw rod 33 moves inward relative to the first lower screw rod 32, the buffer 60 will also move in the direction of the first lower screw rod 32. When the buffer 60 contacts the first lower screw rod 32, the second lower screw rod 33 reaches its maximum displacement in the direction of the first lower screw rod 32, and the second lower screw rod 33 stops moving, thereby preventing the second lower screw rod 33 from continuing to move and causing damage to the second screw rod assembly 30, thereby avoiding affecting the normal use of the second screw rod assembly 30.

[0086] Since the buffer 60 is prone to wear and tear in actual use, two buffers 60 may be provided. When there are two buffers 60, one of them is provided on the side of the upper support plate 12 facing the first upper screw rod 22. This makes the arrangement of the buffer 60 more reasonable. When the upper support plate 12 tends to move downward relative to the first upper screw rod 22, the upper support plate 12 and the buffer 60 tend to move toward the first upper screw rod 22. When the buffer 60 contacts the first upper screw rod 22, the distance between the upper support plate 12 and the first upper screw rod 22 reaches a limit, and the second upper screw rod 23 stops moving, thereby preventing the second upper screw rod 23 from continuing to move and causing damage to the first screw rod assembly 20, thereby preventing the normal use of the first screw rod assembly 20 from being affected.

[0087] Moreover, another buffer member 60 is arranged on the side of the lower support plate 13 facing the first lower screw rod 32, so that the arrangement of the buffer member 60 is more reasonable. When the lower support plate 13 moves upward relative to the first lower screw rod 32, the lower support plate 13 will drive the buffer member 60 to move upward together. When the buffer member 60 contacts the first lower screw rod 32, the distance between the lower support plate 13 and the first lower screw rod 32 reaches the limit, and the second lower screw rod 33 stops moving, thereby preventing the second lower screw rod 33 from continuing to move and causing damage to the second screw rod assembly 30, thereby avoiding affecting the normal use of the second screw rod assembly 30.

[0088] In addition, as shown in Figures 1 and 2, the electric vibration damping device 1 also includes a first guide member 70 and a second guide member 80. The upper end of the second upper screw rod 23 is provided with a first guide groove 301, and the lower end of the second lower screw rod 33 is provided with a second guide groove 302. The upper end of the first guide member 70 is connected to the upper support plate 12, and the lower end of the first guide member 70 is engaged in the first guide groove 301. The lower end of the second guide member 80 is connected to the lower support plate 13, and the upper end of the second guide member 80 is engaged in the second guide groove 302.

[0089] Among them, the first guide member 70 and the second guide member 80 can both play the role of guiding and limiting. The first guide groove 301 and the second guide groove 302 can both play the role of guiding and matching. The upper end of the first guide member 70 is connected to the upper support plate 12, so that the first guide member 70 can be fixed, making the setting of the first guide member 70 more reliable and stable, and the first guide member 70 can better play the role of guiding and limiting. The lower end of the first guide member 70 is matched in the first guide groove 301, and the first guide groove 301 is set at the upper end of the second upper screw rod 23, so that when the second upper screw rod 23 moves relative to the upper support plate 12, the first guide member 70 can limit and guide the second upper screw rod 23 to prevent the second upper screw rod 23 from rotating, so that the second upper screw rod 23 can better cooperate with the second lower screw rod 33.

[0090] Similarly, the lower end of the second guide member 80 is connected to the lower support plate 13, which can fix the second guide member 80, making the second guide member 80 more secure and stable, and the second guide member 80 can better play a guiding and limiting role. The upper end of the second guide member 80 is engaged with the second guide groove 302, and the second guide groove 302 is set at the lower end of the second lower screw rod 33. In this way, when the second lower screw rod 33 moves relative to the lower support plate 13, the second guide member 80 can limit and guide the second lower screw rod 33, preventing the second lower screw rod 33 from rotating, so that the second lower screw rod 33 can better cooperate with the second upper screw rod 23. In this way, relative rotation between the second upper screw rod 23 and the second lower screw rod 33 can be prevented.

[0091] Specifically, the cross-section of the lower end of the first guide member 70 is configured to be any one of a semicircular, triangular, and rectangular shape, and the cross-section of the upper end of the second guide member 80 is configured to be any one of a semicircular, triangular, and rectangular shape. It can be understood that since the first guide member 70 is fixed to the upper support plate 12, the first guide member 70 is fixed relative to the upper support plate 12 and will not rotate. Therefore, the cross-section of the lower end of the first guide member 70 is configured to be one of a semicircular, triangular, or rectangular shape. Accordingly, the cross-section of the first guide groove 301 is the same as the shape of the cross-section of the lower end of the first guide member 70. In this way, the first guide member 70 can better guide and limit the second upper screw rod 23, preventing the second upper screw rod 23 from rotating.

[0092] Similarly, it can be understood that since the second guide member 80 is fixed to the lower support plate 13, the second guide member 80 is fixed relative to the lower support plate 13 and does not rotate. Therefore, the cross-section of the lower end of the second guide member 80 is configured to be a semicircular, triangular, or rectangular shape. Accordingly, the cross-section of the second guide groove 302 is the same as the cross-section of the upper end of the second guide member 80. In this way, the second guide member 80 can better guide and limit the second lower screw rod 33, preventing the second lower screw rod 33 from rotating. Of course, the cross-sections of the first guide member 70 and the second guide member 80 can also be configured to have other suitable shapes.

[0093] This application can be used independently, or in various forms such as springs arranged according to actual working conditions.

[0094] The vehicle according to the present disclosure, as shown in FIG3 , includes the electric vibration reduction device 1 described in any one of the above embodiments.

[0095] In the description of the present disclosure, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present disclosure.

[0096] In the description of the present disclosure, "first feature" and "second feature" may include one or more of the features. In the description of the present disclosure, "plurality" means two or more. In the description of the present disclosure, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, and may also include the first and second features not being in direct contact but being in contact through another feature between them. In the description of the present disclosure, the first feature being "above", "above" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0097] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "example," "specific example," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0098] Although the embodiments of the present disclosure have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations may be made to the embodiments without departing from the principles and spirit of the present disclosure, the scope of which is defined by the claims and their equivalents.

Claims

1. An electric vibration reduction device (1), characterized in that: include: a first screw assembly (20); a second screw assembly (30), the second screw assembly (30) being connected to the first screw assembly (20); a first motor assembly (40); and A second motor assembly (50), one of the first motor assembly (40) and the second motor assembly (50) is suitable for connection to a vehicle body, and the other of the first motor assembly (40) and the second motor assembly (50) is suitable for connection to a wheel of the vehicle, the first motor assembly (40) cooperates with the first screw assembly (20), and the second motor assembly (50) cooperates with the second screw assembly (30).

2. The electric vibration damping device (1) according to claim 1, characterized in that The first screw rod assembly (20) comprises a first base body (21), a first upper screw rod (22) and a second upper screw rod (23); the first base body (21) and the first upper screw rod (22) are in transmission cooperation with each other so that the first upper screw rod (22) rotates and moves; the first upper screw rod (22) and the second upper screw rod (23) are in transmission cooperation with each other so that the second upper screw rod (23) moves up and down; the first motor assembly (40) is used to drive the first upper screw rod (22); The second screw rod assembly (30) comprises a second base body (31), a first lower screw rod (32) and a second lower screw rod (33); the second base body (31) and the first lower screw rod (32) are in transmission cooperation with each other so that the first lower screw rod (32) rotates and moves; the first lower screw rod (32) and the second lower screw rod (33) are in transmission cooperation with each other so that the second lower screw rod (33) moves up and down; the upper end of the second lower screw rod (33) is connected to the lower end of the second upper screw rod (23); and the second motor assembly (50) is used to drive the first lower screw rod (32).

3. The electric vibration damping device (1) according to claim 2, characterized in that The first screw assembly (20) further includes a first upper ball (24), the first seat (21) is provided with a first upper ball groove (211), the first upper screw (22) is provided with a second upper ball groove (221), the first upper ball groove (211) and the second upper ball groove (221) define a first upper rolling space (101), and the first upper ball (24) is provided and fitted in the first upper rolling space (101).

4. The electric vibration damping device (1) according to claim 3, characterized in that The second screw rod assembly (30) further includes a first lower ball (34), the second seat (31) is provided with a first lower ball groove (311), the first lower screw rod (32) is provided with a second lower ball groove (321), the first lower ball groove (311) and the second lower ball groove (321) define a first lower rolling space (102), and the first lower ball (34) is provided and fitted in the first lower rolling space (102).

5. The electric vibration reduction device (1) according to claim 4, characterized in that There are a plurality of first upper ball grooves (211), and the plurality of first upper ball grooves (211) are arranged in the up-down direction of the first seat (21); there are a plurality of second upper ball grooves (221), and the plurality of second upper ball grooves (221) are arranged in the up-down direction of the first upper screw rod (22); the plurality of first upper ball grooves (211) selectively define the first upper rolling space (101) with the plurality of second upper ball grooves (221); There are multiple first lower ball grooves (311), and the multiple first lower ball grooves (311) are arranged in the upper and lower directions of the second seat (31); there are multiple second lower ball grooves (321), and the multiple second lower ball grooves (321) are arranged in the upper and lower directions of the first lower screw rod (32); the multiple first lower ball grooves (311) selectively define the first lower rolling space (102) with the multiple second lower ball grooves (321).

6. The electric vibration damping device (1) according to claim 5, characterized in that The first screw assembly (20) further includes a first upper retaining ring (25), the first upper retaining ring (25) being arranged on the first seat (21), and the first upper retaining ring (25) being located below the plurality of first upper ball grooves (211); The second screw assembly (30) further includes a first lower retaining ring (35), the first lower retaining ring (35) being arranged on the second seat (31), and the first lower retaining ring (35) being located above the plurality of first lower ball grooves (311).

7. The electric vibration reduction device (1) according to any one of claims 2 to 6, characterized in that: The first screw rod assembly (20) further includes a second upper ball (26), the first upper screw rod (22) is further provided with a third upper ball groove (222), the second upper screw rod (23) is provided with a fourth upper ball groove (231), the third upper ball groove (222) and the fourth upper ball groove (231) define a second upper rolling space (201), and the second upper ball (26) is arranged in the second upper rolling space (201), so that when the first upper screw rod (22) rotates, the second upper screw rod (23) is driven to move up and down by the second upper ball (26); The second screw rod assembly (30) further includes a second lower ball (36), the first lower screw rod (32) is further provided with a third lower ball groove (322), the second lower screw rod (33) is provided with a fourth lower ball groove (331), the third lower ball groove (322) and the fourth lower ball groove (331) define a second lower rolling space (202), and the second lower ball (36) is arranged in the second lower rolling space (202) so that when the first lower screw rod (32) rotates, the second lower screw rod (33) is driven to move up and down through the second lower ball (36).

8. The electric vibration damping device (1) according to claim 7, characterized in that There are a plurality of third upper ball grooves (222), and the plurality of third upper ball grooves (222) are arranged in the vertical direction of the first upper screw rod (22); there are a plurality of fourth upper ball grooves (231), and the plurality of fourth upper ball grooves (231) are arranged in the vertical direction of the second upper screw rod (23); the plurality of third upper ball grooves (222) selectively define the second upper rolling space (201) with the plurality of fourth upper ball grooves (231); There are multiple third lower ball grooves (322), and the multiple third lower ball grooves (322) are arranged in the upper and lower directions of the first lower screw rod (32). There are multiple fourth lower ball grooves (331), and the multiple fourth lower ball grooves (331) are arranged in the upper and lower directions of the second lower screw rod (33). The multiple third lower ball grooves (322) selectively define the second lower rolling space (202) with the multiple fourth lower ball grooves (331).

9. The electric vibration damping device (1) according to claim 8, characterized in that The first screw assembly (20) further includes a second upper retaining ring (27), the second upper retaining ring (27) being arranged on the first upper screw (22), and the second upper retaining ring (27) being located below the plurality of third upper ball grooves (222); The second screw assembly (30) further includes a second lower retaining ring (37), which is arranged on the first lower screw (32), and the second lower retaining ring (37) is located above the plurality of third lower ball grooves (322).

10. The electric vibration reduction device (1) according to any one of claims 2 to 9, characterized in that: The direction of the thread on the second upper screw rod (23) is the same as the direction of the thread on the second lower screw rod (33).

11. The electric vibration reduction device (1) according to any one of claims 2 to 10, characterized in that: The first motor assembly (40) includes a first inner coil (41) and a first permanent magnet (42), wherein the first permanent magnet (42) is arranged on the first upper screw rod (22), and when the first inner coil (41) is energized, the first permanent magnet (42) and the first upper screw rod (22) rotate; The second motor assembly (50) comprises a second inner coil (51) and a second permanent magnet (52). The second permanent magnet (52) is arranged on the first lower screw rod (32). When the second inner coil (51) is energized, the second permanent magnet (52) and the first lower screw rod (32) rotate.

12. The electric vibration damping device (1) according to claim 11, characterized in that The invention also includes a housing (10), wherein the first screw assembly (20) and the first motor assembly (40) are both arranged in the housing (10), and the second screw assembly (30) and the second motor assembly (50) are both arranged in the housing (10).

13. The electric vibration damping device (1) according to claim 12, characterized in that The shell (10) comprises a cylinder (11), an upper support plate (12) and a lower support plate (13); the upper support plate (12) is movably arranged at the upper end of the cylinder (11); the first inner coil (41) and the first seat (21) are respectively connected to the side of the upper support plate (12) facing the inside of the cylinder (11); the lower support plate (13) is movably arranged at the lower end of the cylinder (11); the second inner coil (51) and the second seat (31) are respectively connected to the side of the lower support plate (13) facing the inside of the cylinder (11).

14. The electric vibration damping device (1) according to claim 13, characterized in that Also included is a buffer member (60), wherein There is one buffer member (60), and the buffer member (60) is provided at the connection between the second upper screw rod (23) and the second lower screw rod (33); or There are two buffer members (60), one of the two buffer members (60) is arranged on a side of the upper support plate (12) facing the first upper screw rod (22), and the other of the two buffer members (60) is arranged on a side of the lower support plate (13) facing the first lower screw rod (32).

15. The electric vibration damping device (1) according to claim 13 or 14, characterized in that: Also includes: A first guide member (70) and a second guide member (80), the upper end of the second upper screw rod (23) is provided with a first guide groove (301), the lower end of the second lower screw rod (33) is provided with a second guide groove (302), the upper end of the first guide member (70) is connected to the upper support plate (12), and the lower end of the first guide member (70) is fitted in the first guide groove (301), the lower end of the second guide member (80) is connected to the lower support plate (13), and the upper end of the second guide member (80) is fitted in the second guide groove (302).

16. The electric vibration damping device (1) according to claim 15, characterized in that The cross-section of the lower end of the first guide member (70) is configured as any one of a semicircle, a triangle and a rectangle, and the cross-section of the upper end of the second guide member (80) is configured as any one of a semicircle, a triangle and a rectangle.

17. A vehicle (100), characterized in that include: An electric vibration damping device (1) according to any one of claims 1 to 16.

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