Damping device, suspension system and vehicle

Abstract

The embodiment of the invention provides a damping device, a suspension system and a vehicle. The vibration damping device comprises a cam and a damping device, wherein the cam comprises a side wall and a containing cavity defined by the side wall; the moving part is movably connected with the cam in a matched mode so as to move in the axial direction of the cam; at least part of the driving part is arranged in the containing cavity, the driving part is connected with the cam, and the driving part is used for driving the cam to move so as to drive the moving part to move in the axial direction. The axial length of the damping device is small, the axial installation space, occupied by the damping device, of the vehicle is reduced, and the space layout of the vehicle is optimized.

Description

Technical Field

[0001] This application belongs to the field of vehicle technology, specifically relating to a shock absorption device, suspension system, and vehicle. Background Technology

[0002] As an important component of automobiles, vibration damping devices can improve the comfort and safety of vehicles by adjusting the vehicle's height. However, current vibration damping devices have a relatively large axial length. Summary of the Invention

[0003] This application aims to provide a vibration damping device, suspension system, and vehicle to solve the problem of excessive axial length in existing vibration damping devices.

[0004] To solve the above-mentioned technical problems, this application is implemented as follows:

[0005] In a first aspect, this application discloses a vibration damping device, comprising:

[0006] A cam, the cam including sidewalls and a receiving cavity enclosed by the sidewalls;

[0007] A movable element, which is movably connected to a cam to enable movement of the movable element along the cam axis; and a drive element, at least a portion of which is disposed within the receiving cavity, wherein the drive element and the cam are connected and the drive element is used to drive the cam to move so as to cause the movable element to move axially.

[0008] Optionally, the drive unit is connected to the sidewall.

[0009] Optionally, the driving component includes a rotor and a stator, the rotor being fixedly connected to the side wall, the rotor cooperating with the stator, and the stator being connected to a fixing component.

[0010] Optionally, the rotor is interference-fitted with the sidewall of the receiving cavity.

[0011] Optionally, the rotor is connected to the sidewall by a key.

[0012] Optionally, the rotor is coaxially arranged with the cam.

[0013] Optionally, the side wall is provided with a guide rail, which is arranged in a ring on the side wall in the circumferential direction of the cam. The moving member is movably engaged with the guide rail. When the driving member drives the cam to rotate, the moving member moves along the axial direction of the cam.

[0014] Optionally, the top surface of the sidewall is recessed along the axial direction of the cam to form the guide rail.

[0015] Optionally, the guide rail has a highest position and a lowest position along the cam axis, and from the lowest position to the highest position, the distance from the guide rail to the bottom surface of the sidewall along the cam axis gradually decreases.

[0016] Optionally, the moving part includes a moving rod, which has a first connecting part and a second connecting part spaced apart in the axial direction, wherein the first connecting part is connected to the guide rail, and the second connecting part is adapted to be connected to the component to be damped.

[0017] Optionally, a first ball bearing is connected to the first connecting portion, the first ball bearing cooperates with the guide rail, and the first ball bearing can roll relative to the guide rail.

[0018] Optionally, the movable component further includes a fixed cover, which has a first annular slide rail and is adapted to be connected to the component to be damped.

[0019] The second connecting part is provided with a second ball bearing, which cooperates with the first annular slide, and the second ball bearing can roll relative to the first annular slide.

[0020] Optionally, the first annular slide is coaxially arranged with the cam.

[0021] Optionally, the width of the first annular slide is equal to the width of the guide rail along the radial direction of the cam.

[0022] Optionally, the vibration damping device further includes a cam cover, which covers the opening of the receiving cavity of the cam to shield the receiving cavity.

[0023] Optionally, the cam cover is provided with a second annular slide, the cam cover forming a second annular slide that extends along the cam axis, and the moving member passes through the second annular slide.

[0024] Optionally, the vibration damping device further includes a fixed shaft, one end of which is connected to the stator, and the other end extends out of the receiving cavity and is connected to a fixing member.

[0025] Optionally, the movable member and the fixed shaft are arranged parallel to each other along the axial direction of the cam, and the axis of the movable member is not collinear with the axis of the fixed shaft.

[0026] Optionally, the sidewall is further provided with a boss formed by the inner surface of the sidewall protruding radially toward the drive member, the boss being used to mount the drive member.

[0027] Optionally, the vibration damping device further includes: a housing, the housing having a mounting cavity, at least a portion of the cam being disposed within the mounting cavity, and the cam being rotatably connected to the housing.

[0028] Optionally, a rolling bearing is connected between the cam and the housing, so that the cam is rotatable relative to the housing.

[0029] Optionally, the vibration damping device further includes a fixed shaft, one end of which is connected to the drive member, and the other end extends out of the receiving cavity and is connected to the stator.

[0030] Optionally, the housing is also adapted to be connected to a vibration damping component.

[0031] Secondly, this application also discloses a suspension system, including: the damping device described in any of the above claims.

[0032] Thirdly, this application also discloses a vehicle, including: the suspension system described above, or the shock absorption device described in any of the above claims.

[0033] Optionally, the movable component includes a fixed cover, the shock absorption device includes a housing, the vehicle includes a body and wheels connected to the body, the fixed cover is connected to the body, and the housing is connected to the wheels.

[0034] In this embodiment, the vibration damping device includes a cam, a moving part, and a driving part. The driving part drives the cam to move, which in turn drives the moving part to move along the cam axis, thereby realizing the vibration damping function of the vibration damping device. By setting at least part of the driving part inside the cam, it is not necessary to set the driving part and the cam separately, thus reducing the axial length of the vibration damping device and reducing the installation space occupied by the vibration damping device in the vehicle, thereby optimizing the spatial layout of the vehicle.

[0035] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0036] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0037] Figure 1 This is a schematic diagram of the structure of a vibration damping device according to an embodiment of this application;

[0038] Figure 2 yes Figure 1 The diagram shows a cross-sectional structure of a vibration damping device.

[0039] Figure 3 This is a schematic diagram of the structure of a cam in a vibration damping device according to an embodiment of this application.

[0040] Figure 4This is a cross-sectional schematic diagram of the cam of a vibration damping device according to an embodiment of this application;

[0041] Figure 5 This is a schematic diagram of the guide rail of a vibration damping device described in an embodiment of this application.

[0042] Reference numerals: 1. Cam; 10. Side wall; 11. Receiving cavity; 12. Guide rail; 2. Moving part; 20. Moving rod; 201. First connecting part; 202. Second connecting part; 203. First ball; 204. Second ball; 21. Fixed cover; 210. First annular slide; 3. Driving part; 30. Rotor; 31. Stator; 4. Fixed shaft; 5. Boss; 6. Housing; 60. Mounting cavity; 7. Rolling bearing; 8. Cam cover; 80. Second annular slide. Detailed Implementation

[0043] Embodiments of this application will now be described in detail. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0044] The terms "first" and "second" in the specification and claims of this application may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise stated, "multiple" means two or more. Furthermore, "and / or" in the specification and claims indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0045] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0046] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0047] This application provides a vibration damping device, which can be used in vehicles in practical applications. For example, the vibration damping device is connected between the vehicle body and the suspension to achieve the function of vibration damping.

[0048] Reference Figure 1 - Figure 5 Specifically, such as Figure 1 and Figure 2 As shown, the vibration damping device includes a cam 1, which includes a sidewall 10 and a receiving cavity 11 formed by the sidewall 10; a moving member 2, which is movably connected to the cam 1 to realize the movement of the moving member 2 along the axial direction of the cam 1; and a driving member 3, at least a portion of which is disposed in the receiving cavity 11. The driving member 3 is connected to the cam 1 and is used to drive the cam 1 to move, thereby driving the moving member 2.

[0049] Specifically, the cam 1 has a receiving cavity 11 inside. The portion of the driving member 3 located inside the receiving cavity 11 is connected to the cam 1, while the portion located outside the receiving cavity 11 can be connected to other fixed members. The moving member 2 is movably connected to the cam 1. The driving member 3 generates a driving force, which causes the cam 1 to move relative to the fixed members, thereby causing the moving member 2 to move along the axial direction of the cam 1. Figure 1 and Figure 2 The vertical direction of the cam 1 moves up and down, thereby converting the movement of the cam 1 relative to the fixed part into the up and down movement of the moving part 2, so that the damping device can adjust the vehicle height and thus achieve the function of damping.

[0050] In this embodiment, by placing at least a portion of the drive component 3 inside the cam 1, the drive component 3 and the cam 1 are no longer separated, thus reducing the axial length of the damping device and consequently reducing the axial installation space occupied by the damping device in the vehicle, optimizing the vehicle's spatial layout. Furthermore, the drive component 3 and the cam 1 can be integrated into a single assembly, reducing external mounting interfaces and improving installation efficiency. In addition, the cam 1 has a hollow structure, reducing its weight and thus the weight of the damping device.

[0051] like Figure 2As shown, optionally, the drive unit 3 is connected to the side wall 10.

[0052] Specifically, the drive component 3 is located inside the receiving cavity 11 and is fixedly connected to the side wall. In practical applications, by directly connecting the drive component 3 to the side wall 10, the driving force generated by the drive component 3 can directly act on the cam 1, driving its precise movement and improving the response speed of the vibration damping device. The structural strength of the side wall 10 itself provides a more robust support frame for the drive component 3, enabling it to more effectively resist external interference and ensuring stable and efficient operation. Furthermore, compared to the external connection method in existing technologies, no additional connecting parts are required, reducing the cost of the vibration damping device.

[0053] like Figure 2 As shown, optionally, the driving component 3 includes a rotor 30 and a stator 31. The rotor 30 is fixedly connected to the side wall 10, the rotor 30 cooperates with the stator 31, and the stator 31 is connected to a fixing component.

[0054] Specifically, the driving component 3 is a motor, which includes a rotor 30 and a stator 31. The rotor 30 is fixedly connected to the side wall 10 and has a magnetic component. The stator 31 has a winding. The rotor 30 is connected to the stator 31 and is sleeved on the outside of the stator 31. Both the rotor 30 and the stator 31 are located in the receiving cavity 11. The stator 31 is also connected to a fixed component located outside the receiving cavity 11. The fixed component can be any component located outside the receiving cavity 11 that does not rotate relative to the cam 1. When the winding on the stator 31 is energized, an electromagnetic force can be generated. This electromagnetic force can act on the magnetic component on the rotor 30, driving the magnetic component to rotate the rotor 30 along the axial direction of the cam 1. The rotor 30 drives the cam 1 to rotate relative to the fixed component.

[0055] In this embodiment, by directly fixing the rotor 30 to the side wall 10 of the cam 1, not only is the force transmission path optimized and energy loss reduced, but the rotational torque of the drive component 3 can also act more directly and efficiently on the cam 1, driving its precise movement and improving the response speed and control accuracy of the entire vibration damping device. Furthermore, the cam 1 can protect the rotor 30 and stator 31, improving the stability and sealing of the drive component 3. In addition, the drive component 3 is a motor, which can actively provide power for the adjustment of the vibration damping device, actively control the adjustable parts in the vibration damping device, and actively adjust the movement of the vibration damping device itself, transforming passive into active control, enabling the vibration damping device to adapt to different working conditions and improving ride comfort and handling.

[0056] It should be noted that the specific structures of the rotor 30 and stator 31 in the embodiments of this application, the structure and specific setting method of the magnetic components on the rotor 30 and the windings on the stator 31 can be specifically set according to the actual situation, and the embodiments of this application do not make specific limitations on this.

[0057] Optionally, the rotor 30 is interference-fitted with the sidewall 10 of the receiving cavity 11.

[0058] Specifically, the cam 1 can be a cylindrical cam 1 with a cylindrical receiving cavity 11, and the rotor 30 is also a cylindrical rotor 30. The size of the cylindrical surface of the rotor 30 in contact with the side wall 10 is slightly larger than the diameter of the inner hole of the side wall 10, ensuring that a predetermined interference fit can be formed when the rotor 30 and the side are assembled. This allows the rotor 30 to be radially embedded in the receiving cavity 11 of the side wall 10 with a small interference fit, thereby fixing the rotor 30 to the side wall 10 of the cam 1. In this embodiment, since the interference fit generates pressure, a large frictional force is generated on the contact surface between the rotor 30 and the cam 1. This frictional force allows the cam 1 and the rotor 30 to maintain good connection stability even under vibration or load changes, improving the connection reliability between the cam 1 and the drive component 3. Furthermore, the interference fit eliminates the need for additional fasteners, reducing the use of additional parts, simplifying the structure, reducing weight, and lowering assembly costs.

[0059] It should be noted that the interference fit can be set according to the specific dimensions of the cam 1 and the rotor 30, and this embodiment does not impose any specific limitations on it.

[0060] like Figure 3 As shown, optionally, the rotor 30 is connected to the sidewall 10 by a key.

[0061] Specifically, multiple keyways are provided on the surface of the sidewall 10 that contacts the rotor 30. These keyways extend axially along the cam 1, and their cross-sectional profile is adapted to the type of key used. For example, the key type is a flat key, and the keyway has a rectangular cross-section to ensure stable key embedding. The depth and width of the keyway correspond to the size specifications of the selected key. A key receiving area matching the keyway is provided on the surface of the rotor 30 that contacts the sidewall 10. This area is designed to both firmly clamp the key and ensure coaxiality between the rotor 30 and the sidewall 10. The geometry of this receiving area is determined based on the shape of the key's mating surface to ensure that after installation, the key, along with the keyway of the sidewall 10 and the receiving area of ​​the rotor 30, forms a stable three-point or multi-point support structure. Through the synergistic effect of lateral pressure and friction, slippage-free power transmission is achieved.

[0062] In practical applications, key connection is a classic mechanical connection method. By embedding a key between the rotor 30 and the side wall 10, a firm fixation between the two can be ensured, maintaining a stable connection even under high vibration or long-term operating conditions. This method enhances the rigidity and accuracy of torque transmission, reduces the risk of slippage during rotation, and thus improves the response speed and working efficiency of the entire vibration damping device. Furthermore, compared to other fixing methods, key connection is a simpler and easier-to-disassemble connection method, which can reduce the complexity of the connection between the rotor 30 and the side wall 10, facilitating the maintenance of the vibration damping device.

[0063] Furthermore, such as Figure 3 As shown, the rotor 30 and the side wall 10 are connected by multiple keys, which can further improve the reliability of the connection between the rotor 30 and the cam 1.

[0064] In some alternative embodiments, the rotor 30 is interference-fitted with the sidewall 10, and the rotor 30 and the sidewall 10 are connected by a key. In this embodiment, by both interfering with the sidewall 10 of the receiving cavity 11 and connecting it by a key, the reliability of the connection between the rotor 30 and the cam 1 is further improved.

[0065] Optionally, the rotor 30 is coaxially arranged with the cam 1.

[0066] like Figure 2 As shown, specifically, the rotor 30 is disposed inside the receiving cavity 11, and the central axis of the rotor 30 coincides with the central axis of the cam 1. The rotor 30 is disposed on the central axis of the cam 1, so that the rotor 30 and the cam 1 are coaxially disposed.

[0067] In practical applications, by effectively reducing the lateral dimensions of the device through the rotor 30 and cam 1, the device becomes more compact, further reducing the size of the vibration damping device. This provides more usable space for other system components inside the vehicle, improving space utilization. The coaxial arrangement of rotor 30 and cam 1, compared to the need for external connectors to transmit power in existing technologies, significantly reduces intermediate mechanical transmission links, enhances the overall rigidity and stability of the system, reduces energy loss during power transmission, and thus improves operating efficiency. It ensures perfect synchronization of the movements of rotor 30 and cam 1, reducing control errors caused by transmission lag or misalignment, resulting in a faster dynamic response and stronger adaptability to road surface changes.

[0068] like Figure 2 , Figure 4 , Figure 5As shown, optionally, the side wall 10 is provided with a guide rail 12. The guide rail 12 is arranged in a ring on the side wall 10 in the circumferential direction of the cam 1. The moving member 2 is movably engaged with the guide rail 12. When the driving member 3 drives the cam 1 to rotate, the moving member 2 moves along the axial direction of the cam 1.

[0069] Specifically, an annular guide rail 12 is provided on the side wall 10. The annular guide rail 12 is provided from bottom to top along the axial direction of the cam 1 on the side wall 10. The movable part 2 can move and cooperate with the guide rail 12. When the driving part 3 drives the cam 1 to rotate, the movable part 2 moves in annular motion on the guide rail 12 and moves up and down along the axial direction of the cam 1, thereby converting the rotational motion of the cam 1 into the up and down movement of the movable part 2, which can realize the vibration reduction function of the vibration reduction device.

[0070] In practical applications, the guide rail 12 provides precise guidance and constraint for the movement of the moving part 2, ensuring that the position control of the moving part 2 is highly accurate at any given moment, avoiding unnecessary lateral offset or swaying, improving the guidance and positioning accuracy of the moving part 2 along the axial direction of the cam 1, making the response in the vibration damping adjustment process faster and more consistent, helping to maintain the stability of the vehicle and improve the driving experience.

[0071] Optionally, the top surface of the sidewall 10 is recessed along the axial direction of the cam 1 to form the guide rail 12.

[0072] Specifically, at least a portion of the top surface of the sidewall 10, located above the cam 1 along its axial direction, is recessed downwards along the cam 1 to form a continuous and closed annular track, thereby creating an annular guide rail 12 inside the sidewall 10. In practical applications, the guide rail 12 function is achieved through the change in the shape of the sidewall 10 itself, eliminating the need for a separate guide rail 12 component. This effectively reduces the number of components and the required space, making the vibration damping device more compact and further reducing its size.

[0073] Optionally, the guide rail 12 has a highest position and a lowest position along the axial direction of the cam 1, and from the lowest position to the highest position, the distance from the guide rail 12 to the top surface of the sidewall 10 along the axial direction of the cam 1 gradually decreases.

[0074] Specifically, refer to Figure 2 , Figure 4 and Figure 5Inside the sidewall 10, the annular guide rail 12 has a highest and a lowest position in the axial direction of the cam. The lowest position is the starting point of the guide rail 12 along the axial direction of the cam 1, where the vertical distance between the guide rail and the top surface of the sidewall 10 is the maximum. This is the starting point where the guide rail begins to rise. The highest position is the maximum height reached by the guide rail 12 along the same axial direction, where the vertical distance between the guide rail 12 and the top surface of the sidewall 10 reaches the minimum value designed for the guide rail 12. This is the end point of the guide rail 12's rise. From the lowest to the highest position, the distance from the guide rail 12 to the top surface of the sidewall 10 along the axial direction of the cam 1 gradually decreases, causing the guide rail 12 to exhibit a rising trend from the lowest to the highest position along the axial direction of the cam 1. For the moving member 2, this is like an inclined plane, and the component force or sliding force generated by this height difference can be used to drive the moving member 2 to move smoothly along the axial direction, realizing the movement of the moving member 2 along the axial direction of the cam 1.

[0075] like Figure 2 and Figure 3 As shown, optionally, the moving part 2 includes: the moving part 2 includes: a moving rod 20, the moving rod 20 having a first connecting part 201 and a second connecting part 202 spaced apart in the axial direction, wherein the first connecting part 201 is connected to the guide rail 12, and the second connecting part 202 is adapted to be connected to the component to be damped.

[0076] Specifically, the movable rod 20 is a rigid rod-shaped structure. A first connecting portion 201 and a second connecting portion 202 are respectively provided on both sides along the axial direction of the movable rod 20. The first connecting portion 201 is located within the guide rail 12 and moves within the guide rail 12. The second connecting portion 202 is used for fixed connection with the component to be damped. The movement of the first connecting portion 201 within the guide rail 12 drives the movement of the second connecting portion 202, which in turn drives the component to be damped to move, thus realizing the damping function of the damping device.

[0077] In this embodiment, by setting the moving part 2 as a rod-shaped structure, the moving rod 20 has a relatively simple structure, is easy to manufacture and assemble, and can effectively reduce costs. Secondly, its straight shape is conducive to uniform torque transmission, improves system stability and response speed, has a simple structure, is easy to manufacture and install, and reduces the manufacturing cost and maintenance difficulty of the shock absorption device.

[0078] The movable rod 20 can be any shape, such as a rectangular rod or a cylindrical rod, and can be specifically set according to the actual situation. This application embodiment does not make specific limitations in this regard.

[0079] like Figure 2 and Figure 3 As shown, a first ball bearing 203 is connected to the first connecting part 201. The first ball bearing 203 cooperates with the guide rail 12 and can roll relative to the guide rail 12.

[0080] Specifically, the first ball bearing 203 is connected to the moving rod 20. The first ball bearing 203 is circular, and its diameter matches the radial width of the guide rail 12. The first ball bearing 203 can roll within the guide rail 12. In this embodiment, the first ball bearing 203 can roll within the guide rail 12. Because the frictional force of rolling is less than the frictional force generated when the first ball bearing 203 slides directly within the guide rail 12, rolling contact significantly reduces motion resistance compared to traditional sliding contact. This makes the moving part 2 more sensitive and faster in responding to vibrations, improving the overall working efficiency and dynamic performance of the vibration damping system. Furthermore, it significantly reduces wear between components, contributing to the long-term stable operation of the device, extending the service life of the vibration damping device, and reducing maintenance costs.

[0081] In other alternative embodiments, the first ball bearing 203 may also be fixedly connected to the movable rod 20, or the first ball bearing 203 and the movable rod 20 may be integrally formed components.

[0082] Optionally, the movable component 2 further includes a fixed cover 21, on which a first annular slide 210 is provided, and the fixed cover 21 is adapted to be connected to the component to be damped; the second connecting part 202 is provided with a second ball bearing 204, which cooperates with the first annular slide 210, and the second ball bearing 204 can roll relative to the first annular slide 210.

[0083] Specifically, the fixed cover 21 is connected to the component to be damped, and one end of the moving rod 20 is connected to the guide rail 12, while the other end is connected to the fixed cover 21. The movement of the moving rod 20 in the guide rail 12 can be divided into two parts: one part is the vertical up-and-down movement of the first connecting part 201, and the other part is the annular movement of the first connecting part 201 relative to the cam 1. The second connecting part 202 is connected to the first annular slide 210 provided in the fixed cover 21. When the first connecting part 201 moves in the guide rail 12, the second connecting part 202 simultaneously moves in the first annular slide 210 in the fixed cover 21. This satisfies both the rotation of the moving rod 20 relative to the housing 6 and the movement of the moving rod 20 driving the fixed cover 21 to move vertically, thereby driving the component to be damped to move vertically, thus realizing the damping function of the damping device. In this embodiment, the direct connection between the fixed cover 21 and the component to be damped, along with the design of the first annular slide 210, provides a stable guide and support for the movement trajectory of the moving component 2, thereby enhancing the rigidity and reliability of the overall structure.

[0084] The fixing cover 21 can be any shape such as rectangular or circular, and its specific size can be selected according to the actual situation. This application embodiment does not make specific limitations in this regard.

[0085] Specifically, the second ball 204 is circular, and its diameter is matched to the vertical height of the annular slide. When the moving rod 20 moves in the guide rail 12, the second ball 204 moves in the annular slide. In practical applications, the rolling contact of the second ball 204 significantly reduces motion resistance compared to traditional sliding contact, making the moving part 2 more sensitive and faster to vibration, thus improving the overall working efficiency and dynamic performance of the vibration damping system. Furthermore, it significantly reduces wear between components, contributing to the long-term stable operation of the device, extending the service life of the vibration damping device, and reducing maintenance costs.

[0086] In other alternative embodiments, the second ball 204 may also be fixedly connected to the moving rod 20, or the first ball 204 and the moving rod 20 may be an integrally formed component.

[0087] Optionally, the first annular slide 210 is coaxially arranged with the cam 1.

[0088] Specifically, the first annular slide 210 is collinear with the central axis of the cam 1 in the axial direction of the cam. By setting the first annular slide and the cam 1 coaxially, the transmission path of the driving force is made more direct, reducing the additional wear that may be caused by eccentric movement. The contact between the second ball 204 and the first annular slide 210 is more uniform, effectively reducing friction loss. It also ensures that when the moving rod 20 moves along the axial direction of the cam 1, the rolling trajectory of the second ball 204 on the first annular slide 210 is highly synchronized and coordinated with the rotation of the cam 1, improving the smoothness and response speed of the vibration damping device.

[0089] Optionally, the width of the first annular slide 210 is equal to the width of the guide rail 12 in the radial direction of the cam 1.

[0090] like Figure 2 As shown, specifically, the radial direction of cam 1 can be in Figure 2 In the left-right direction, the width A of the first annular slide 210 and the guide rail 12 in the radial direction is equal. Specifically, the width A can be the difference A between the maximum and minimum diameters of the first annular slide 210 and the guide rail 12 in the radial direction. In this embodiment, by making the width A of the first annular slide 210 and the guide rail 12 in the radial direction of the cam 1 equal, space can be utilized more effectively, ensuring that there is no unnecessary extra space between the two components, making the whole device more compact, and enabling higher precision docking during assembly, reducing assembly errors and improving the overall system's operating accuracy.

[0091] like Figure 1 and Figure 2As shown, optionally, the vibration damping device further includes a cam cover 8, which covers the opening of the receiving cavity 11 of the cam 1 to shield the receiving cavity 11.

[0092] Specifically, the cam cover 8 can be fixedly connected to the cam 1 to shield at least the receiving cavity 11, and the shape of the cam cover 8 is adapted to the shape of the cam 1. In this embodiment, by providing the cam cover 8, the internal structure of the cam 1 can be protected. The cam cover 8 can effectively prevent external pollutants such as dust, moisture, and impurities from entering the receiving cavity 11, protecting the cam 1 and other internal mechanical components from environmental damage and extending their service life.

[0093] Optionally, such as Figure 2 As shown, the cam cover 8 has a second annular slide 80 that extends along the axial direction of the cam 1, and the moving member 2 passes through the second annular slide 80.

[0094] Specifically, when the moving part 2 moves in the guide rail 12, the moving part 2 passes through the second annular slide rail 80, and the moving part 2 is movable in the second annular slide rail 80.

[0095] When the guide rail 12 is located inside the side wall 10, in order to close the guide rail 12, the cam cover 8 is simultaneously placed on top of the receiving cavity 11 and the guide rail 12. When the moving part 2 moves inside the guide rail 12, in order to cooperate with the movement of the moving part 2, a second annular slide 80 is provided on the cam cover 8. The moving part 2 passes through the second annular slide 80 in the cam cover 8 and connects with the fixed cover 21 or the component to be damped. The width of the second annular slide 80 in the radial direction of the cam 1 is slightly larger than the width of the moving part 2 in the radial direction of the cam 1, so that the moving rod 20 can pass through the cam cover 8 and connect with the fixed cover 21 or the component to be damped.

[0096] Furthermore, the second annular slide 80 and cam 1 are coaxially arranged. By making the second annular slide 80 and cam 1 coaxial, the transmission path of the driving force is made more direct, reducing the additional wear that may be caused by eccentric movement. This ensures that when the moving part 2 moves along the axial direction of cam 1, the rolling trajectory of the moving part 2 on the second annular slide 80 is highly synchronized and coordinated with the rotation of cam 1, thereby improving the smoothness and response speed of the vibration damping device.

[0097] Optionally, the vibration damping device further includes a fixed shaft 4, one end of which is connected to the driving member 3, and the other end extends out of the receiving cavity 11 and is connected to a fixing member outside the receiving body.

[0098] Specifically, such as Figure 2As shown, one end of the fixed shaft 4 is fixedly connected to the part of the drive member 3 located inside the receiving cavity 11, and the other end extends out of the receiving cavity 11 and is connected to the fixing member. The fixing member can be any component located outside the receiving cavity 11 that does not rotate relative to the cam 1. In this embodiment, the fixed shaft 4 connects the drive member 3 to the fixing member, which increases the rigidity of the entire device, ensures that the system is more stable when transmitting power, and reduces displacement or shaking caused by vibration.

[0099] Furthermore, such as Figure 2 As shown, the movable component 2 and the fixed shaft 4 are arranged parallel to each other along the axial direction of the cam 1, and the axis of the movable component 2 is not collinear with the axis of the fixed shaft 4.

[0100] Specifically, the guide rail 12 is disposed on the side wall 10, and the fixed shaft 4 is at least partially located inside the receiving cavity 11. The central axis of the moving part 2 in the circumferential direction and the central axis of the fixed shaft 4 in the circumferential direction are parallel to each other but not collinear. This allows the moving part 2 to not only move axially when driven by the cam 1, but also to move in a ring in the guide rail 12, thereby realizing the vibration reduction function of the vibration reduction device.

[0101] like Figure 2 As shown, optionally, the sidewall 10 is further provided with a boss 5 formed by the inner surface of the sidewall 10 protruding radially toward the drive member 3, and the boss 5 is used to install the drive member 3.

[0102] Specifically, the boss 5 protrudes from the side wall 10 in the radial direction of the cam 1, and the drive member 3 is connected to the part of the boss 5 that protrudes from the inner surface of the side wall 10. In this embodiment, the boss 5 can be used to position the drive member 3 in the receiving cavity 11, so that the drive member 3 can be accurately installed in the predetermined position, simplifying the installation process. In addition, the boss 5 can also play the role of installing and supporting the drive member 3, improving the stability and reliability of the drive member 3 in the cam 1.

[0103] like Figure 1 and Figure 2 As shown, the vibration damping device further includes: a housing 6, on which a mounting cavity 60 is provided, at least a portion of the cam 1 is disposed in the mounting cavity 60, and the cam 1 is rotatably connected to the housing 6.

[0104] Specifically, the housing 6 has a mounting cavity 60, within which the cam 1 is disposed. The mounting cavity 60 provides a closed or semi-closed space for the cam 1, effectively preventing dust and dirt from entering the cam 1 and also preventing lubricating oil leakage, thus extending the service life of the cam 1 and its contact parts. Furthermore, placing the cam 1 within the mounting cavity 60 of the housing 6 optimizes the overall mechanism layout, making the vibration damping device more compact and reducing its size. The cam 1 is rotatably connected to the housing 6, and its direct connection to the housing 6 provides better support and stability, reducing vibration and displacement during operation and ensuring the accuracy and reliability of the cam 1's movement.

[0105] like Figure 2 As shown, in some alternative embodiments, a rolling bearing 7 is connected between the cam 1 and the housing 6 so that the cam 1 is rotatable relative to the housing 6.

[0106] Specifically, a rolling bearing 7 can be interference-fitted to the outer side of the cam 1, and the rolling bearing 7 is then interference-fitted to the housing 6, thus connecting the rolling bearing 7 between the cam 1 and the housing 6, allowing the cam 1 to rotate relative to the housing 6. Because the rolling bearing 7 has low frictional resistance, the transmission efficiency between the cam 1 and the housing 6 can be improved. The dimensions of the rolling bearing 7 are adapted to the dimensions of the cam 1 and the housing 6, and can be selected according to the actual situation.

[0107] Optionally, such as Figure 2 As shown, the vibration damping device also includes a fixed shaft 4, one end of which is connected to the stator 31, and the other end extends out of the receiving cavity 11 and is connected to the housing 6.

[0108] Specifically, the fixed shaft 4 is a rigid structural component. One end of the fixed shaft 4 is fixedly connected to the stator 31, and the other end extends out of the receiving cavity 11 and is fixedly connected to the housing 6. On the one hand, the fixed shaft 4 enhances the structural stability of the entire device, ensuring that the movement of the drive component 3 can be more smooth and precise, reducing vibration and sway. On the other hand, the fixed shaft 4 is directly connected to the housing 6, which can reduce the length of the fixed shaft 4 along the axial direction of the cam 1, making the structure of the vibration damping device more compact.

[0109] Optionally, the housing 6 is also adapted to be connected to the component to be damped.

[0110] Specifically, housing 6 can also be used with components to be damped. Because housing 6 is designed to directly connect to the components to be damped, the installation process becomes simpler and faster, reducing the need for customized interfaces and lowering integration costs. Through the direct connection between housing 6 and the damping components, vibration energy can be transmitted more efficiently, allowing the damping device to act more directly on the vibration source and improving overall damping performance.

[0111] Specifically, in the axial direction of the cam 1, a mounting part is provided on the housing 6, and the cam 1 is connected to the mounting part to restrict the axial movement of the cam 1.

[0112] It should be noted that the component to be vibration-damped in the above embodiments refers to any component or assembly that generates vibration during operation or is affected by external vibration, and whose vibration characteristics need to be improved through vibration reduction measures. For example, the component to be vibration-damped may be an engine, electric motor, drive shaft, pump, compressor, etc.

[0113] In summary, the vibration damping device of this application embodiment may include at least the following advantages:

[0114] In this embodiment, by placing the drive component 3 inside the cam 1, the drive component 3 and the cam 1 are no longer separated, thus reducing the axial length of the damping device and consequently reducing the axial installation space occupied by the damping device in the vehicle, optimizing the vehicle's spatial layout. Furthermore, the drive component 3 and the cam 1 can be integrated into a single assembly, reducing external mounting interfaces and improving installation efficiency. In addition, the cam 1 has a hollow structure, reducing its weight and thus the weight of the damping device.

[0115] This application also provides a suspension system, including: the vibration damping device described in any of the above embodiments.

[0116] It should be noted that in this embodiment, the structure of the vibration damping device is the same as that of the vibration damping device in any of the above embodiments, and its beneficial effects are similar, so it will not be described in detail here.

[0117] This application also provides a vehicle, which may specifically include the shock absorption device or the suspension system described in any of the above embodiments.

[0118] It should be noted that in this embodiment, the structure of the vibration damping device is the same as that of the vibration damping device in any of the above embodiments, and its beneficial effects are similar, so it will not be described in detail here.

[0119] Optionally, the movable component 2 includes a fixed cover 21, the vibration damping device includes a housing 6, the vehicle includes a body and wheels connected to the body, the fixed cover 21 is connected to the body, and the housing 6 is connected to the wheels.

[0120] Specifically, the fixed cover 21 is fixedly connected to the vehicle body, and the housing 6 is fixedly connected to the wheel. Thus, the shock absorption device can be set between the vehicle body and the wheel. The shock absorption device can effectively absorb the vibration caused by uneven road surface during vehicle operation, prevent these vibrations from being directly transmitted to the vehicle body, thereby reducing the bumpy feeling felt by passengers. Furthermore, since the space between the vehicle body and the wheel is limited, the shock absorption device in this embodiment can reduce the vehicle space it occupies and improve space utilization.

[0121] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0122] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A vibration damping device, characterized in that, include: A cam, the cam including sidewalls and a receiving cavity enclosed by the sidewalls; A movable component, which is movably connected to a cam to enable movement of the movable component along the cam axis; And a drive element, at least a portion of which is disposed within the receiving cavity, the drive element being connected to a cam, the drive element being used to drive the cam to move so as to cause the moving element to move axially.

2. The vibration damping device according to claim 1, characterized in that, The drive unit is connected to the side wall.

3. The vibration damping device according to claim 2, characterized in that, The driving component includes a rotor and a stator. The rotor is fixedly connected to the side wall, and the rotor cooperates with the stator. The stator is connected to the fixing component.

4. The vibration damping device according to claim 3, characterized in that, The rotor is interference-fitted with the sidewall of the receiving cavity.

5. The vibration damping device according to claim 3, characterized in that, The rotor is connected to the sidewall by a key.

6. The vibration damping device according to claim 3, characterized in that, The rotor is coaxially arranged with the cam.

7. The vibration damping device according to claim 1, characterized in that, The side wall is provided with a guide rail, which is arranged in a ring on the side wall in the circumferential direction of the cam. The moving part is movably engaged with the guide rail. When the driving member drives the cam to rotate, the moving part moves along the axial direction of the cam.

8. The vibration damping device according to claim 7, characterized in that, The top surface of the sidewall is recessed along the axial direction of the cam to form the guide rail.

9. The vibration damping device according to claim 8, characterized in that, The guide rail has a highest position and a lowest position along the cam axis, and from the lowest position to the highest position, the distance from the guide rail to the top surface of the sidewall along the cam axis gradually decreases.

10. The vibration damping device according to claim 7, characterized in that, The movable component includes a movable rod, which has a first connecting portion and a second connecting portion spaced apart in the axial direction, wherein the first connecting portion is connected to the guide rail, and the second connecting portion is adapted to be connected to the component to be vibration damped.

11. The vibration damping device according to claim 10, characterized in that, A first ball bearing is connected to the first connecting part. The first ball bearing cooperates with the guide rail and can roll relative to the guide rail.

12. The vibration damping device according to claim 10, characterized in that, The movable component also includes a fixed cover, which has a first annular slide rail and is adapted to be connected to the component to be damped. The second connecting part is provided with a second ball bearing, which cooperates with the first annular slide, and the second ball bearing can roll relative to the first annular slide.

13. The vibration damping device according to claim 12, characterized in that, The first annular slide is coaxially arranged with the cam.

14. The vibration damping device according to claim 12, characterized in that, The width of the first annular slide is equal to the width of the guide rail along the radial direction of the cam.

15. The vibration damping device according to any one of claims 7-14, characterized in that, The vibration damping device also includes a cam cover, which covers the opening of the receiving cavity of the cam to shield the receiving cavity.

16. The vibration damping device according to claim 14, characterized in that, The cam cover has a second annular slide that runs through the cam axis, and the moving member passes through the second annular slide.

17. The vibration damping device according to claim 3, characterized in that, The vibration damping device also includes a fixed shaft, one end of which is connected to the stator, and the other end extends out of the receiving cavity and is connected to a fixing member.

18. The vibration damping device according to claim 17, characterized in that, The movable component and the fixed shaft are arranged parallel to each other along the axial direction of the cam, and the axis of the movable component is not collinear with the axis of the fixed shaft.

19. The vibration damping device according to claim 1, characterized in that, The sidewall is also provided with a boss formed by the inner surface of the sidewall protruding radially toward the drive member, and the boss is used to install the drive member.

20. The vibration damping device according to claim 3, characterized in that, The vibration damping device further includes: a housing, the housing having a mounting cavity, at least a portion of the cam being disposed within the mounting cavity, and the cam being rotatably connected to the housing.

21. The vibration damping device according to claim 20, characterized in that, A rolling bearing is connected between the cam and the housing, so that the cam is rotatable relative to the housing.

22. The vibration damping device according to claim 20, characterized in that, The vibration damping device also includes a fixed shaft, one end of which is connected to the stator, and the other end extends out of the receiving cavity and is connected to the housing.

23. The vibration damping device according to claim 20, characterized in that, The housing is also adapted to be connected to the component to be damped.

24. A suspension system, comprising: The vibration damping device according to any one of claims 1-23 above.

25. A vehicle, characterized in that, The vehicle includes: the suspension system of claim 24, or the damping device of any one of claims 1-23.

26. The vehicle according to claim 25, characterized in that, The movable component includes a fixed cover, the vibration damping device includes a housing, the vehicle includes a body and wheels connected to the body, the fixed cover is connected to the body, and the housing is connected to the wheels.

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