Damping device, suspension system and vehicle

Abstract

The invention relates to the technical field of vehicle parts, in particular to a damping device, a suspension system and a vehicle. The damping device comprises a transmission cam and an execution assembly, and the transmission cam is provided with a guide structure; the execution assembly is in matched transmission with the guide structure, and when the transmission cam moves, the execution assembly is driven to move in the axis direction of the transmission cam. In the damping device, an execution assembly and a guide structure are in matched transmission, when a transmission cam moves, the transmission cam drives the execution assembly to move in the axis direction of the transmission cam, the execution assembly moves to drive a to-be-damped part connected with the execution assembly to move in the axis direction of the transmission cam, and therefore damping is achieved. The damping device achieves damping through matched transmission of the guide structure and the execution assembly in the transmission cam, damping is achieved through a mechanical structure, and the damping device has the advantages of being higher in adjusting capacity and higher in response speed.

Description

Technical Field

[0001] This invention relates to the field of vehicle component technology, and more particularly to a vibration damping device, a suspension system, and a vehicle. Background Technology

[0002] Vibration dampers are a crucial component of a vehicle's suspension system, primarily used to improve ride comfort. Currently, vibration dampers typically utilize the flow of a working medium (liquid or gas) for passive damping. Because the flow of this working medium takes time, vibration dampers suffer from long response times and complex structures. Summary of the Invention

[0003] This invention provides a vibration damping device, a suspension system, and a vehicle to solve the technical problem that existing vibration damping devices use the flow of a working medium to passively buffer and damp the vibration, which requires time for the working medium to flow, resulting in a long response time and a complex structure for the vibration damping device.

[0004] In a first aspect, embodiments of the present invention provide a vibration damping device, which includes a transmission cam and an actuation component. The transmission cam is provided with a guide structure. The actuation component cooperates with the guide structure for transmission, and when the transmission cam moves, it drives the actuation component to move along the axial direction of the transmission cam.

[0005] Optionally, the transmission cam is sleeved on the outside of the actuating component.

[0006] Optionally, the transmission cam includes a cam body with a hollow cavity; the guide structure includes a guide rail disposed on the inner wall of the hollow cavity, the guide rail extending in a helical structure around the axis of the cam body.

[0007] Optionally, the guide rail includes a helical segment that extends along the axial direction of the cam body; when the actuating component moves within the helical segment, the actuating component moves along the axial direction of the cam body.

[0008] Optionally, along the axial direction of the cam body, the helical segment includes a first helical segment, a second helical segment, and a third helical segment connected in sequence, with the second helical segment located in the middle of the helical segment; a plane is made perpendicular to the axial direction of the cam body, and the angle between the second helical segment and the plane is greater than the angle between the first helical segment and the plane, and also greater than the angle between the third helical segment and the plane.

[0009] Optionally, the angle between the second helical segment and the plane is in the range of 25°-35°.

[0010] Optionally, the angle between the first helical segment and the plane gradually decreases in the direction away from the second helical segment; and / or, the angle between the third helical segment and the plane gradually decreases in the direction away from the second helical segment.

[0011] Optionally, the guide rail further includes a smooth section disposed at at least one end of the helical section; a plane is made perpendicular to the axis of the cam body, and the angle between the smooth section and the plane is A, satisfying: 0°≤A≤5°.

[0012] Optionally, when the actuating component moves within the smooth section, the actuating component stops moving in the axial direction of the cam body.

[0013] Optionally, the guide rail is formed by a radial recess along the cam body.

[0014] Optionally, the inner wall of the hollow cavity is further provided with a guide groove, one end of which is connected to the guide rail, and the other end of which extends away from the guide rail to the end face of the cam body.

[0015] Optionally, the actuation component further includes a cam drive shaft, one end of which is disposed within the hollow cavity, and the other end of which extends outside the hollow cavity to be connected to the component to be damped.

[0016] Optionally, the actuation component further includes a cam follower, one end of which engages with the guide rail for transmission, and the other end of which is connected to the cam drive shaft.

[0017] Optionally, the cam follower is provided with a rolling part, and when the cam drive shaft moves along the axial direction of the drive cam, the rolling part rolls relative to the guide rail.

[0018] Optionally, at least part of the cam follower is disposed within the guide rail.

[0019] Optionally, there are two guide rails, and the two guide rails form a double helix structure.

[0020] Optionally, two cam followers are provided, and the two cam followers are arranged coaxially.

[0021] Optionally, the cam drive shaft and the drive cam are coaxially arranged.

[0022] Optionally, the cam drive shaft is provided with a guide cavity, and the vibration damping device further includes a guide rod, which is adapted to be connected to a fixing member; both the guide cavity and the guide rod are arranged along the axial direction of the drive cam, and at least a portion of the guide rod is disposed within the guide cavity.

[0023] Optionally, the guide rod is provided with a gas channel, the gas channel having a first opening and a second opening, the first opening communicating with the guide cavity, and the second opening communicating with the hollow cavity.

[0024] Optionally, the gas passage has a first section extending along the axial direction of the transmission cam and a second section extending along the diametrical direction of the transmission cam, the first section and the second section being connected; the first opening is provided at the end of the first section away from the second section, and the second opening is provided at the end of the second section away from the first section.

[0025] Optionally, one end of the guide rod is inserted into the guide cavity, and the end face of one end of the guide rod is provided with the first opening.

[0026] Optionally, the cam drive shaft has an opening in the guide cavity opposite to the end face of the component to be damped; the guide rod passes through the opening in the guide cavity and is inserted into the guide cavity.

[0027] Optionally, the end of the guide rod opposite to the cam drive shaft is connected to the fixing member.

[0028] Optionally, the guide rod and the cam drive shaft are coaxially arranged, and the guide cavity and the cam drive shaft are coaxially arranged.

[0029] Optionally, the vibration damping device further includes a guide rod sliding bearing, which is disposed between the cam drive shaft and the guide rod.

[0030] Optionally, the vibration damping device further includes a cam drive mechanism; the cam drive mechanism is connected to the transmission cam; the cam drive mechanism is used to drive the transmission cam to rotate, so that the actuating component moves along the axial direction of the transmission cam.

[0031] Optionally, the cam drive mechanism is coaxially arranged with the transmission cam.

[0032] Optionally, the cam drive mechanism is sleeved on the outside of the transmission cam.

[0033] Optionally, the cam drive mechanism is a drive motor; the drive motor includes a motor stator and a motor mover; the motor mover is sleeved on the outside of the transmission cam and connected to the transmission cam; the motor stator is sleeved on the outside of the motor mover at intervals.

[0034] Optionally, the vibration damping device further includes a detection element for detecting the position of the actuation component.

[0035] Optionally, the detection element is a resolver sensor, which includes a resolver sensor stator and a resolver sensor mover; the resolver sensor mover is sleeved on the outside of the transmission cam and connected to the transmission cam; the resolver sensor stator is connected to a fixing member, and the resolver sensor stator is sleeved on the outside of the resolver sensor mover at intervals.

[0036] Optionally, the detection element is connected to the end of the transmission cam that is away from the part to be damped.

[0037] Optionally, the housing of the vibration damping device is formed as a fixed member, and the housing is provided with a receiving cavity, in which the transmission cam, the cam drive mechanism and the detection element are disposed.

[0038] Optionally, the housing includes a first end cap, a first section housing, a second section housing, and a second end cap, which are sequentially connected along the axial direction of the transmission cam to form the accommodating cavity.

[0039] Optionally, along the axial direction of the transmission cam, a first cavity opening is provided on the end face of one end of the transmission cam, and a second cavity opening is provided on the end face of the other end of the transmission cam; the transmission cam is provided with a first mating structure at the first cavity opening and a second mating structure at the second cavity opening; the first mating structure is rotatably mated with the first end cap, and the second mating structure is rotatably mated with the second end cap.

[0040] Optionally, at least a portion of the detection element is located between the first end cap and the first housing section.

[0041] Optionally, the diameter of the first housing segment is larger than the diameter of the second housing segment, one end of the cam drive mechanism and the transmission cam are disposed inside the first housing segment, and the other end of the transmission cam is disposed inside the second housing segment.

[0042] Optionally, the end of the guide rod opposite to the cam drive shaft is connected to the first end cover.

[0043] Optionally, the end of the cam drive shaft opposite to the drive cam extends out of the receiving cavity through the second end cover.

[0044] Optionally, the first end cap is provided with a cable outlet and a cooling pipe placement port.

[0045] Optionally, the vibration damping device further includes a damping spring and a second spring rubber pad, with a stepped surface formed between the first housing section and the second housing section; the second spring rubber pad is spaced apart from the stepped surface, and the second spring rubber pad is connected to the end of the cam drive shaft extending out of the drive cam; one end of the damping spring abuts against the stepped surface, and the other end of the damping spring abuts against the second spring rubber pad.

[0046] Secondly, embodiments of the present invention provide a suspension system, the suspension system including the vibration damping device as described above.

[0047] Thirdly, embodiments of the present invention also provide a vehicle, the vehicle including a vehicle body and a shock-absorbing device as described above, the vehicle body being provided with the shock-absorbing device; or, the vehicle including a vehicle body and a suspension system as described above, the vehicle body being provided with the suspension system.

[0048] Compared with prior art, the present invention has the following advantages:

[0049] In the vibration damping device of this invention, the actuating component and the guiding structure cooperate for transmission. When the transmission cam moves, the transmission cam drives the actuating component to move along the axial direction of the transmission cam. The movement of the actuating component will drive the component to be damped, which is connected to the actuating component, to move along the axial direction of the transmission cam, thereby achieving vibration damping. The vibration damping device achieves vibration damping through the cooperation of the guiding structure and the actuating component in the transmission cam. This is a vibration damping device achieved through a mechanical structure, which has the advantages of stronger adjustment capability, faster response speed, and simple structure.

[0050] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, and in order to make the above and other objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention are described below. Attached Figure Description

[0051] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0052] Figure 1 This is a schematic diagram of a vibration damping device provided in an embodiment of the present invention;

[0053] Figure 2 This is a top view of a vibration damping device provided in an embodiment of the present invention.

[0054] Figure 3 for Figure 2 A schematic diagram of the structure in the AA cross-sectional view;

[0055] Figure 4 This is a schematic diagram of the structure of a first end cap provided in an embodiment of the present invention;

[0056] Figure 5 This is a structural schematic diagram of a cross-sectional view of a first end cap provided in an embodiment of the present invention;

[0057] Figure 6 This is a schematic diagram of the structure of a resolver sensor provided in an embodiment of the present invention;

[0058] Figure 7 This is a schematic diagram of the structure of a fastener provided in an embodiment of the present invention;

[0059] Figure 8 This is a schematic diagram of the structure of a transmission cam and a cam drive mechanism provided in an embodiment of the present invention;

[0060] Figure 9 A cross-sectional view of a transmission cam and cam drive mechanism provided in an embodiment of the present invention is shown in the diagram.

[0061] Figure 10 This is a schematic diagram of a spiral line with a first angle provided in an embodiment of the present invention;

[0062] Figure 11 A schematic diagram of a spiral-shaped second angle provided in an embodiment of the present invention;

[0063] Figure 12 A schematic diagram of a spiral-shaped third angle provided in an embodiment of the present invention;

[0064] Figure 13 for Figure 12 A schematic diagram of the enlarged view of section C;

[0065] Figure 14 This is a schematic diagram of the structure of a guide rod and a cam drive shaft provided in an embodiment of the present invention;

[0066] Figure 15 A top view of a guide rod and a cam drive shaft provided in an embodiment of the present invention;

[0067] Figure 16 for Figure 15 A structural schematic diagram of the BB cross-section view.

[0068] 10-Transmission cam; 11-Cam body; 12-Guide rail; 121-Helical section; 122-Smooth section; 13-Guide groove; 14-Transmission cam stop; 15-First shoulder; 16-Second shoulder; 18-Hollow cavity;

[0069] 20 - Actuating component; 21 - Cam drive shaft; 211 - Guide cavity; 22 - Cam follower;

[0070] 30 - Shell; 31 - First section of shell; 32 - Second section of shell; 33 - First end cap; 34 - Second end cap; 331 - Inlet / outlet of first end cap; 332 - Arc-shaped through hole of first end cap; 333 - Bolt post of first end cap; 334 - Threaded through hole of first end cap; 335 - Internal thread of first end cap; 336 - First stop; 337 - Second stop;

[0071] 40 - Guide rod; 41 - Gas passage; 42 - Second opening; 43 - First opening; 44 - Guide rod threaded part; 45 - Guide rod first internal threaded part; 46 - Guide rod second internal threaded part;

[0072] 50 - Cam drive mechanism; 51 - Motor stator; 511 - Motor busbar; 512 - Motor winding; 513 - Stator core; 514 - Motor insulation frame; 515 - Motor key feature; 52 - Motor mover;

[0073] 60 - Detection element; 61 - Resolver sensor stator; 611 - Sensor groove; 612 - Sensor first through hole; 613 - Sensor first boss; 614 - Sensor connecting wire; 62 - Resolver sensor mover; 621 - Sensor mounting part; 622 - Sensor second boss;

[0074] 71-Guide rod sliding bearing; 73-Lower fork arm; 74-Damping spring; 76-First rolling bearing; 77-Sensor fixing component; 771-Sensor fixing component through hole; 772-Sensor fixing component groove; 773-Sensor fixing component boss; 774-Sensor fixing component tray; 78-First spring rubber pad; 79-Drive shaft sliding bearing; 80-Second rolling bearing; 81-Buffer block; 82-Dust cover; 83-Second spring rubber pad; E-Flat plane. Detailed Implementation

[0075] Exemplary embodiments of the invention will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the invention and to fully convey the scope of the invention to those skilled in the art.

[0076] Shock absorbers are part of the suspension system. Their main function is to reduce bumps and vibrations during vehicle operation, improving ride comfort and vehicle handling stability. The working principle of shock absorbers is to absorb and dissipate energy caused by uneven road surfaces, thereby reducing the vertical movement of the vehicle body.

[0077] Reference Figures 1 to 16As shown, this application embodiment provides a vibration damping device, which includes a transmission cam 10 and an actuation component 20. The transmission cam 10 is provided with a guide structure; the actuation component 20 cooperates with the guide structure for transmission, and when the transmission cam 10 moves, it drives the actuation component 20 to move along the axial direction of the transmission cam 10.

[0078] In the vibration damping device of this application embodiment, the actuator 20 is driven in conjunction with the guide structure. When the transmission cam 10 moves, the transmission cam 10 drives the actuator 20 to move along the axial direction of the transmission cam 10. The movement of the actuator 20 will drive the shock-absorbing component connected to the actuator 20 to move along the axial direction of the transmission cam 10, thereby achieving vibration damping.

[0079] The shock absorption device achieves shock absorption through the cooperation of the guide structure in the transmission cam 10 and the actuator 20. It achieves shock absorption through mechanical structure and has the advantages of stronger adjustment capability and faster response speed.

[0080] In some embodiments, the transmission cam 10 is sleeved on the outside of the actuator 20. The transmission cam 10 can protect the actuator 20 from the transmission of the guide structure, so as to ensure the shock absorption function of the shock absorption device.

[0081] In some embodiments, the transmission cam 10 includes a cam body 11, the cam body 11 having a hollow cavity 18; the guide structure includes a guide rail 12 disposed on the inner wall of the hollow cavity 18, the guide rail 12 extending in a helical structure around the axis of the cam body 11. The actuating component 20 moves within the guide rail 12, and when the transmission cam 10 moves, the actuating component 20 moves along the axial direction of the transmission cam 10, thereby achieving vibration reduction.

[0082] Further reference Figure 9 As shown, along the axial direction of the transmission cam 10, the end faces at both ends of the transmission cam 10 are provided with cavity openings of hollow cavities 18, and the hollow cavities 18 are connected to the outside of the transmission cam 10 through these two cavity openings.

[0083] In this embodiment, a guide rail 12 is provided on the inner wall of the hollow cavity 18. When the transmission cam 10 rotates, the actuator 20 moves within the guide rail 12 and moves along the axial direction of the transmission cam 10 to achieve vibration reduction. The rotation of the transmission cam 10 causes the actuator 20 to move to achieve vibration reduction, thus providing vibration reduction for the mechanical structure. This has the advantages of stronger adjustment capability and faster response speed.

[0084] In some embodiments, the guide rail 12 includes a helical segment 121 that extends along the axial direction of the cam body 11; when the actuating component 20 moves within the helical segment 121, the actuating component 20 moves along the axial direction of the cam body 11.

[0085] Furthermore, the helical segment 121 extends along the axial direction of the cam body 11. When the actuator 20 moves within the helical segment 121, the actuator 20 moves along the axial direction of the cam body 11 to achieve vibration reduction.

[0086] In some embodiments, along the axial direction of the cam body 11, the helical segment 121 includes a first helical segment, a second helical segment, and a third helical segment connected in sequence, with the second helical segment located in the middle of the helical segment 121; a plane E is made perpendicular to the axial direction of the cam body 11, and the angle between the second helical segment and the plane E is greater than the angle between the first helical segment and the plane E, and also greater than the angle between the third helical segment and the plane E.

[0087] When the actuating component 20 moves within the helical segment 121, it also moves along the axial direction of the cam body 11. When the actuating component 20 rotates by the same angle around the axis of the cam body 11, the distance it moves along the axial direction of the cam body 11 is greater when it moves in conjunction with the second helical segment compared to when it moves in conjunction with the first and third helical segments. When the damping device is not performing damping, the actuating component 20 engages with the second helical segment and is located at the middle of the second helical segment along the axial direction of the cam body 11. When the damping device performs damping, the actuating component 20 moves from the middle of the second helical segment, allowing it to quickly move a large distance along the axial direction of the cam body 11, thus achieving a rapid damping response.

[0088] In some embodiments, the angle between the second helical segment and the plane E is in the range of 25°-35°. In the embodiments of this application, when the angle between the second helical segment and the plane E is in the above range, the helix angle of the second helical segment is relatively large, and the actuator 20 can better achieve a fast vibration reduction response.

[0089] It is understood that the embodiments of this application do not specifically limit the angle between the second helical segment and the plane E. For example, the angle between the second helical segment and the plane E is one of 25°, 26°, 27°, 28°, 29°, 30°, 31°, 32°, 33°, 34°, and 35°, as well as multiple angles between the above angles.

[0090] In some embodiments, the angle between the first helical segment and the plane E gradually decreases as the first helical segment moves away from the second helical segment; and / or, the angle between the third helical segment and the plane E gradually decreases as the third helical segment moves away from the second helical segment.

[0091] In some embodiments, the guide rail 12 further includes a smooth section 122 disposed at at least one end of the helical section 121; a plane E is made perpendicular to the axial direction of the cam body 11, and the angle between the smooth section 122 and the plane E is A, satisfying: 0°≤A≤5°.

[0092] In the structure described above in this application, when the angle A between the smooth segment 122 and the plane E meets the aforementioned range, the actuator 20 essentially stops moving along the axial direction of the cam body 11 when it slides along the smooth segment 122 in the guide rail 12, thus achieving hovering. Especially when the angle A between the smooth segment 122 and the plane E is 0°, the actuator 20 slides along the smooth segment 122 in the guide rail 12 without moving along the axial direction of the cam body 11, effectively achieving hovering.

[0093] Further reference Figures 10 to 13 , Figure 10 and Figure 11 This is a schematic diagram of the spiral structure from two different perspectives. Figure 12 This is a schematic diagram of the spiral structure unfolding in a plane. Figure 13 for Figure 12 A schematic diagram of an enlarged view of section C. Figure 10 and Figure 12 The diagram shows plane E, and it can be seen that the angle between the smooth segment 122 and plane E is smaller than the angle between the spiral segment 121 and plane E. The angle between the smooth segment 122 and plane E can be referenced... Figure 13 As shown.

[0094] In some embodiments, when the actuator 20 moves within the smooth section 122, the actuator 20 stops moving in the axial direction of the cam body 11, and the transmission cam 10 enables the actuator 20 to achieve a hovering function, and the vibration damping device can achieve an autonomous hovering function.

[0095] Optionally, to enable the actuator 20 to achieve better hovering, the angle A between the smooth segment 122 and the plane E gradually decreases from the end connected to the spiral segment 121 to the end of the smooth segment 122 away from the spiral segment 121, until the angle A is 0°. When the actuator 20 moves in the smooth segment 752, it first decelerates and then hovers.

[0096] Optionally, in another embodiment, a plane E is made perpendicular to the axis of the cam body 11; along the axial direction of the cam body 11, from the middle of the helical segment 121 to the end of the helical segment 121, the angle between the helical segment 121 and the plane E gradually decreases.

[0097] At this time, when the actuator 20 rotates by the same angle around the axis of the cam body 11, the actuator 20 slides from the middle of the helical segment 121 to the end of the helical segment 121. The distance that the actuator 20 moves along the axis of the cam body 11 gradually decreases. The actuator 20 can achieve rapid vibration reduction response and deceleration.

[0098] In some embodiments, refer to Figure 9As shown, the guide rail 12 is formed by a radial recess along the cam body 11.

[0099] In some embodiments, the inner wall of the hollow cavity 18 is further provided with a guide groove 13. One end of the guide groove 13 is connected to the guide rail 12, and the other end of the guide groove 13 extends to the end face of the cam body 11 in a direction away from the guide rail 12. When the actuator 20 is installed, it first moves along the guide groove 13 and then slides to connect with the guide rail 12. The guide groove 13 is used to realize the installation of the actuator 20.

[0100] Reference Figure 9 As shown, one end of the guide groove 13 extends along the axial direction of the cam body 11, and the other end of the guide groove 13 is a curved segment, which makes the guide groove 13 and the guide rail 12 smoothly connected.

[0101] In some embodiments, there are two guide rails 12, which form a double helix structure. In this case, the actuator 20 can slide along both guide rails 12 simultaneously, which has the advantage of more stable movement.

[0102] In one specific embodiment, the transmission cam 10 is provided with two guide rails 12 and guide grooves 13 that are mirror images of the axes of the cam body 11.

[0103] The two guide rails 12 have a double helix structure and are adapted to slide with the actuator 20, as shown in the reference. Figures 10 to 13 As shown, guide rail 12 corresponds to the range of motion of actuator 20 during the normal operation of the vibration damping device. Guide rail 12 has a helical section 121 and smooth sections 122 at both ends of the helical section 121. The angle between smooth section 122 and plane E is smaller than the angle between helical section 121 and plane E, and the angle A between smooth section 122 and plane E satisfies: 0°≤A≤5°. This structure is beneficial for the rapid response of the vibration damping device and the control at the upper and lower stroke limit positions. Because at the upper and lower stroke limit positions, the movement speed of the vibration damping device is close to zero, and the axial force on the outside reaches its maximum value. Therefore, the movement trajectory required at this position is smooth, which can transmit the axial force with maximum efficiency while leaving space for the vibration damping device to decelerate. The two guide grooves 13 are assembly features. Actuator 20 slides along guide grooves 13 to push the transmission cam 10 into the guide rail 12 for sliding connection.

[0104] In the transmission cam 10 of this embodiment, the rotation of the transmission cam 10 enables the actuator 20 to achieve vibration reduction, thus providing vibration reduction for the mechanical structure and offering advantages such as stronger adjustment capability and faster response speed. When the actuator 20 slides along the guide rail 12, it can slide upwards or downwards along the axis of the cam body 11 to achieve vibration reduction, providing bidirectional sliding vibration reduction and a faster response. Moreover, the transmission cam 10 has the advantages of simple structure, mature processing technology, and low cost.

[0105] In some embodiments, the actuation component 20 further includes a cam drive shaft 21, one end of which is disposed within the hollow cavity 18, and the other end of which extends outside the hollow cavity 18 to be connected to the component to be damped. The cam drive shaft 21 enables the transmission connection between the component to be damped and the transmission cam 10.

[0106] In some embodiments, the execution component 20 further includes a cam follower 22, one end of which engages with the guide rail 12 for transmission, and the other end of which is connected to the cam drive shaft 21.

[0107] In the above embodiments of this application, the cam drive shaft 21 is in motion engagement with the guide rail 12 of the drive cam 10 through the cam follower 22.

[0108] Among them, the component to be damped can be the lower fork arm 73, which is connected to the wheel end.

[0109] In the above structure of this application embodiment, the cam follower 22 can slide along the guide rail 12 to drive the cam drive shaft 21 to move along the axial direction of the cam body 11. When the cam drive shaft 21 moves, it drives the lower fork arm 73 to move, so as to achieve vibration reduction, absorb the bumps and impacts of the road surface, and at the same time maintain wheel end contact to ensure the stability and handling of the vehicle.

[0110] In some embodiments, the cam follower 22 is provided with a rolling part, and when the cam drive shaft 21 moves along the axial direction of the drive cam 10, the rolling part rolls relative to the guide rail 12. In the above structure of the embodiments of this application, the rolling part can reduce the frictional force of the cam follower 22 when it slides on the guide rail 12, so that the vibration damping device can better achieve vibration damping.

[0111] In some embodiments, the rolling part is a rolling bearing, which is slidably connected to the guide rail 12. The rolling bearing can reduce the friction of the cam follower 22 when it slides on the guide rail 12, so that the vibration damping device can achieve better vibration damping.

[0112] In some embodiments, the cam follower 22 disposed at the end of the guide rail 12 is a structure adapted to the guide rail 12 and can slide along the guide rail 12 to perform its function. This application embodiment does not specifically limit this. For example, the cam follower 22 disposed at the end of the guide rail 12 is at least one of cylindrical, rectangular, spindle-shaped, and conical.

[0113] In some embodiments, at least a portion of the cam follower 22 is disposed within the guide rail 12. That is, the cam follower 22 is disposed according to usage requirements to reduce the clearance between the cam drive shaft 21 and the drive cam 10, making the structure of the vibration damping device more compact.

[0114] In some embodiments, two cam followers 22 are provided, and the two cam followers 22 are coaxially arranged. In this embodiment, the end of the cam drive shaft 21 that extends into the hollow cavity 18 is connected to the two cam followers 22, and the two cam followers 22 are respectively embedded in the two guide rails 12. The two cam followers 22 slide along the two guide rails 12 to drive the cam drive shaft 21 to move along the axial direction of the cam body 11, which has the advantage of more stable movement.

[0115] In some embodiments, refer to Figure 3 As shown, the cam drive shaft 21 and the drive cam 10 are coaxially arranged.

[0116] In some embodiments, the cam drive shaft 21 is provided with a guide cavity 211, and the vibration damping device further includes a guide rod 40, which is adapted to be connected to a fixing member; the guide cavity 211 and the guide rod 40 are both arranged along the axial direction of the drive cam 10, and at least a portion of the guide rod 40 is disposed in the guide cavity 211.

[0117] In the above structure of this application embodiment, the guide rod 40 can limit the movement trajectory of the cam drive shaft 21, thereby improving the accuracy of the cam drive shaft 21 and the vibration damping device.

[0118] In some embodiments, the guide rod 40 is provided with a gas channel 41, which has a first opening 43 and a second opening 42. The first opening 43 communicates with the guide cavity 211, and the second opening 42 communicates with the hollow cavity 18. Specifically, the second opening 42 communicates with the hollow cavity 18 outside the guide rod 40 and the cam drive shaft 21.

[0119] In this embodiment of the application, the guide cavity 211 and the hollow cavity 18 are connected by the gas channel 41, the second opening 42 and the first opening 43 of the guide rod 40, so as to maintain the air pressure balance between the guide cavity 211 and the hollow cavity 18 and avoid the air pressure change of the guide cavity 211 from affecting the movement of the cam drive shaft 21.

[0120] In some embodiments, the gas passage 41 has a first passage extending along the axial direction of the transmission cam 10 and a second passage extending along the diametrical direction of the transmission cam 10, the first passage and the second passage being connected; a first opening 43 is provided at the end of the first passage away from the second passage, and a second opening 42 is provided at the end of the second passage away from the first passage.

[0121] In some embodiments, one end of the guide rod 40 is inserted into the guide cavity 211, and a first opening 43 is provided on the end face of one end of the guide rod 40.

[0122] In some embodiments, refer to Figures 14 to 16 As shown, the second opening 42 is located at the end of the guide rod 40 away from the guide cavity 211.

[0123] In some embodiments, the end face of the cam drive shaft 21 facing away from the component to be damped is provided with a cavity opening of the guide cavity 211; the guide rod 40 passes through the cavity opening of the guide cavity 211 and is inserted into the guide cavity 211.

[0124] In some embodiments, the end of the guide rod 40 away from the cam drive shaft 21 is connected to a fixing member.

[0125] In some embodiments, the guide rod 40 and the cam drive shaft 21 are coaxially arranged, and the guide cavity 211 and the cam drive shaft 21 are coaxially arranged.

[0126] In some embodiments, the vibration damping device further includes a guide rod sliding bearing 71, which is disposed between the cam drive shaft 21 and the guide rod 40. In this embodiment, the guide rod sliding bearing 71 is used to reduce the friction between the guide rod 40 and the cam drive shaft 21, and to limit the positional relationship between the guide rod 40 and the cavity wall of the guide cavity 211, so that the cam drive shaft 21 can move along the axis of the drive cam 10, thereby improving the accuracy of the vibration damping device.

[0127] In some embodiments, the vibration damping device further includes a drive shaft sliding bearing 79, which is fixedly connected to the housing 30, and the cam drive shaft 21 is slidably connected within the drive shaft sliding bearing 79. The drive shaft sliding bearing 79 is used to reduce the friction between the cam drive shaft 21 and the housing 30, and to limit the movement of the cam drive shaft 21 along the axis of the drive cam 10, thereby improving the accuracy of the vibration damping device.

[0128] In some embodiments, the vibration damping device further includes a cam drive mechanism 50; the cam drive mechanism 50 is connected to the transmission cam 10; the cam drive mechanism 50 is used to drive the transmission cam 10 to rotate so that the actuation component 20 moves along the axial direction of the transmission cam 10.

[0129] In this embodiment, the cam drive mechanism 50 drives the transmission cam 10 to rotate, so that the execution component 20 slides along the guide rail 12 to achieve vibration reduction. The vibration reduction device is an active vibration reduction device, which actively adapts to different working conditions to improve ride comfort and handling.

[0130] In some embodiments, the cam drive mechanism 50 is coaxially arranged with the transmission cam 10 to achieve stable rotation of the transmission cam 10.

[0131] In some embodiments, the cam drive mechanism 50 is sleeved on the outside of the transmission cam 10. In this case, the cam drive mechanism 50 does not occupy the internal space of the transmission cam 10, thereby making the structure of the vibration damping device more compact.

[0132] In some embodiments, the cam drive mechanism 50 is a drive motor; the drive motor includes a motor stator 51 and a motor mover 52; the motor mover 52 is sleeved on the outside of the transmission cam 10 and connected to the transmission cam 10; the motor stator 51 is sleeved on the outside of the motor mover 52 at intervals.

[0133] Specifically, refer to Figure 3 and Figure 9 As shown, the motor stator 51 is sleeved on the outside of the motor mover 52 at intervals. For example, the motor stator 51 and the motor mover 52 have a 1mm air gap, which ensures that the movement of the motor mover 52 will not be interfered with by the motor stator 51, while also ensuring the electromagnetic interaction distance in the drive motor.

[0134] In this embodiment, the motor mover 52 is sleeved on the outside of the transmission cam 10 along the diameter direction of the transmission cam 10, and the motor stator 51 is sleeved on the outside of the motor mover 52 at intervals. This arrangement integrates the transmission cam 10 and the motor mover 52, making the vibration damping device more compact and reducing its volume.

[0135] In some embodiments, the cam drive mechanism 50 is a drive motor, which is located at one end of the transmission cam 10 and the guide rail 12 is located at the other end of the transmission cam 10. The drive motor includes a motor stator 51 and a motor mover 52. The motor stator 51 is connected to the housing 30 of the vibration damping device. The motor mover 52 is spaced apart and sleeved on the outside of the motor stator 51. The transmission cam 10 is sleeved on the outside of the motor mover 52 and the transmission cam 10 is fixedly connected to the motor mover 52.

[0136] Specifically, the motor mover 52 is spaced apart and sleeved on the outside of the motor stator 51. This is to ensure that the movement of the motor mover 52 is not interfered with by the motor stator 51, while also ensuring the electromagnetic interaction distance in the drive motor.

[0137] In this embodiment, the transmission cam 10 is arranged with the motor mover 52 spaced apart on the outside of the motor stator 51 along the diametrical direction of the transmission cam 10, and the transmission cam 10 is spaced apart on the outside of the motor mover 52. This arrangement integrates the transmission cam 10 and the motor mover 52, making the vibration damping device more compact and reducing its volume.

[0138] In some embodiments, the cam drive mechanism 50 is a drive motor, which is located outside the housing 30. A rotary drive shaft is provided on the transmission cam 10, which extends out of the housing 30 and is connected to the output end of the drive motor. The drive motor can also actively drive the transmission cam 10 to rotate, thereby achieving active vibration reduction.

[0139] In some embodiments, the vibration damping device further includes a detection element 60 for detecting the position of the actuation component 20, so as to precisely control the movement distance of the actuation component 20 along the axial direction of the cam body 11 when the position of the actuation component 20 is determined.

[0140] In some embodiments, the detection element 60 is a resolver sensor, which includes a resolver sensor stator 61 and a resolver sensor mover 62; the resolver sensor mover 62 is sleeved on the outside of the transmission cam 10 and connected to the transmission cam 10; the resolver sensor stator 61 is connected to a fixing member, and the resolver sensor stator 61 is sleeved on the outside of the resolver sensor mover 62 at intervals.

[0141] In this embodiment, the resolver sensor mover 62 is sleeved on the outside of the drive cam 10 along the diameter direction, and the resolver sensor stator 61 is sleeved on the outside of the resolver sensor mover 62 at intervals. For example, there is a 1mm gap between the resolver sensor stator 61 and the resolver sensor mover 62. This gap can prevent the resolver sensor mover 62 from rubbing against the resolver sensor stator 61 when it rotates, and can also ensure that the resolver sensor stator 61 senses the magnetic field change caused by the movement of the resolver sensor mover 62.

[0142] In some embodiments, the detection element 60 is connected to the end of the transmission cam 10 away from the part to be damped.

[0143] In some embodiments, the housing 30 of the vibration damping device is formed as a fixing member, and the housing 30 is provided with a receiving cavity, in which a transmission cam 10, a cam drive mechanism 50, and a detection element 60 are disposed. This is to protect and fix the transmission cam 10, the cam drive mechanism 50, and the detection element 60, and to ensure the vibration damping function and stable operation of the vibration damping device.

[0144] In some embodiments, the housing 30 includes a first end cap 33, a first housing segment 31, a second housing segment 32, and a second end cap 34. Along the axial direction of the transmission cam 10, the first end cap 33, the first housing segment 31, the second housing segment 32, and the second end cap 34 are sequentially connected to form an accommodating cavity.

[0145] In some embodiments, along the axial direction of the transmission cam 10, a first cavity opening is provided on the end face of one end of the transmission cam 10, and a second cavity opening is provided on the end face of the other end of the transmission cam 10; a first mating structure is provided at the first cavity opening, and a second mating structure is provided at the second cavity opening; the first mating structure is rotatably mated with the first end cover 33, and the second mating structure is rotatably mated with the second end cover 34.

[0146] In the embodiments of this application, the first mating structure and the second mating structure can be conventional rotational mating structures, such as the mating of a shaft shoulder and a bearing.

[0147] In some embodiments, at least a portion of the detection element 60 is located between the first end cap 33 and the first housing 31, and the first end cap 33 and the first housing 31 fix the detection element 60.

[0148] In some embodiments, the diameter of the first housing 31 is larger than the diameter of the second housing 32. One end of the cam drive mechanism 50 and the transmission cam 10 are disposed within the first housing 31, and the other end of the transmission cam 10 is disposed within the second housing 32. In this case, the diameters of the first housing 31 and the second housing 32 are set according to usage requirements, which makes the structure of the vibration damping device more compact.

[0149] In some embodiments, the end of the guide rod 40 away from the cam drive shaft 21 is connected to the first end cap 33.

[0150] In some embodiments, the end of the cam drive shaft 21 that is away from the drive cam 10 passes through the receiving cavity via the second end cover 34.

[0151] In some embodiments, the vibration damping device further includes a damping spring 74 and a second spring rubber pad 83, with a stepped surface formed between the first housing 31 and the second housing 32; the second spring rubber pad 83 is spaced apart from the stepped surface and is connected to the end of the cam drive shaft 21 extending out of the drive cam 10; one end of the damping spring 74 abuts against the stepped surface, and the other end of the damping spring 74 abuts against the second spring rubber pad 83. In this embodiment, the damping spring 74 can achieve the purpose of auxiliary vibration damping.

[0152] In some embodiments, the outer casing of the vibration damping device includes a first end cap 33, a first housing section 31, a second housing section 32, and a second end cap 34. Along the axial direction of the cam body 11, the first end cap 33, the first housing section 31, the second housing section 32, and the second end cap 34 are coaxial and sequentially connected. The diameter of the first housing section 31 is larger than the diameter of the second housing section 32. A first spring rubber pad 78 is provided at the step position between the first housing section 31 and the second housing section 32. Along the axial direction of the cam body 11, the second end cap 34 and the second spring rubber pad 83 are spaced apart, and the second spring rubber pad 83 is connected to the lower fork arm 73. A damping spring 74 is sleeved on the second housing section 32, and both ends of the damping spring 74 are fixedly connected to the first spring rubber pad 78 and the second spring rubber pad 83, respectively. The first end cap 33, the first housing section 31, the second housing section 32, the second end cap 34, the first spring rubber pad 78, the second spring rubber pad 83, the lower fork arm 73, and the damping spring 74 are used to bear the weight of the vehicle body. The active control part of the vibration damping device includes a resolver sensor stator 61, a resolver sensor mover 62, a motor stator 51, a motor mover 52, a guide rod 40, a transmission cam 10, a cam drive shaft 21, and a cam follower 22.

[0153] The specific connection structure of the main body of the vibration damping device is as follows: along the axial direction of the cam body 11, the first end cover 33, the first housing section 31, the second housing section 32, and the second end cover 34 are connected in sequence to form a rigid outer shell for bearing the weight of the vehicle. The first end cover 33, the first housing section 31, the second housing section 32, and the second end cover 34 can be connected using fasteners such as bolts. To achieve a seal, sealant or other sealing methods can also be used to ensure that the inside of the housing 30 is not contaminated by external mud, water, or dust. The sensor fixing component 77 is located between the first end cover 33 and the first housing section 31, and can share the bolts or other fasteners connecting the first end cover 33 and the first housing section 31. The second housing section 32 is connected to the first spring rubber pad 78 by means of glue, welding, or a flat key. The vibration damping spring 74 is sandwiched between the first spring rubber pad 78 and the second spring rubber pad 83. The first spring rubber pad 78 and the second spring rubber pad 83 have limiting features that cooperate with the vibration damping spring 74 to prevent the vibration damping spring 74 from rotating or deviating from the axis. A dust cover 82 is fitted onto the end of the cam drive shaft 21 that extends out of the housing 30. One end of the dust cover 82 abuts against the second end cap 34, and the other end abuts against the lower fork arm 73. The lower fork arm 73 is connected to the second spring rubber pad 83 by a fixed connection or integral molding. The cam drive shaft 21 passes through the second housing 32, the first spring rubber pad 78, the second end cap 34, the dust cover 82, the damping spring 74, and the second spring rubber pad 83, and is then fixedly connected to the lower fork arm 73 by bolts or other fasteners. The cam drive shaft 21 is set along the axis of the cam body 11. When it moves along the axis of the cam body 11, the lower fork arm 73 will also move along the axis of the cam body 11 to achieve the vibration damping function. The upper end of the vibration damping device is connected to the vehicle body through the first end cap bolt post on the first end cap 33, and the lower end of the vibration damping device is connected to the wheel end through the lower fork arm 73. The vibration damping device not only supports the entire vehicle but also adjusts the vehicle height.

[0154] Furthermore, refer to Figure 4 and Figure 5As shown, the upper end of the first end cover 33 is provided with a first end cover bolt post 333 for connecting to the vehicle body; a first end cover threaded through hole 334 is provided around the outer edge of the first end cover 33 to facilitate the fixing of the first end cover 33, the first housing 31, and the sensor fixing component 77 with bolts and other fasteners. The first end cover arc-shaped through hole 332 is used for the exit of wires such as the sensor connection line 614 and the cam drive mechanism 50, that is, the first end cover arc-shaped through hole 332 serves as the wire outlet. The first end cover water inlet and outlet 331 can be used to connect to an external water pipe for the inflow and outflow of cooling medium for cooling the cam drive mechanism 50; the first end cover water inlet and outlet 331 can also serve as the placement port for cooling pipes. The first end cover internal thread 335 is used for fixed connection with the guide rod threaded part 44 of the guide rod 40. The first stop 336 and the second stop 337 are used to fix the motor stator 51 and limit and tighten the motor stator 51.

[0155] Reference Figure 6 As shown, the resolver sensor mover 62 has a sensor mounting part 621 and a second sensor boss 622 protruding into the resolver sensor mover 62. The sensor mounting part 621 and the second sensor boss 622 are used to engage with the transmission cam stop 14 at the upper end of the transmission cam 10. The resolver sensor mover 62 rotates synchronously with the transmission cam 10. The resolver sensor stator 61 and the resolver sensor mover 62 are installed concentrically and on the same plane, with a gap between them. The resolver sensor stator 61 has a sensor groove 611, a sensor first through hole 612, and a sensor first boss 613.

[0156] Reference Figure 7 As shown, the sensor fixing member 77 is used to connect with the stator 61 of the resolver sensor. The inner ring end of the sensor fixing member 77 is provided with a sensor fixing member tray 774, and the sensor fixing member tray 774 is provided with a sensor fixing member groove 772 and a sensor fixing member boss 773. The sensor fixing member groove 772 is connected to the first sensor boss 613, and the sensor fixing member boss 773 is connected to the first sensor through hole 612. The outer ring end of the sensor fixing member 77 is provided with a sensor fixing member through hole 771, through which fasteners such as bolts pass to connect the sensor fixing member 77 between the first end cover 33 and the first housing section 31.

[0157] Reference Figure 3 , Figure 8 and Figure 9As shown, the motor mover 52, motor stator 51, and transmission cam 10 are coaxially arranged. The motor mover 52 is fixedly connected to the outer peripheral surface of the transmission cam 10, and the motor stator 51 is fixedly connected to the inner wall of the first housing 31 via a motor key feature 515 on its outer peripheral surface. The structure of the motor stator 51 is specifically designed according to the usage requirements, and this embodiment does not limit it. For example, the motor stator 51 includes a motor busbar 511, a motor winding 512, a stator core 513, and a motor insulation frame 514.

[0158] The upper end of the transmission cam 10 is provided with a transmission cam stop 14, which is used for interference fit with the second sensor boss 622 protruding inward on the mover 62 of the resolver sensor. The first shoulder 15 inside the upper end of the transmission cam 10 is used to limit the first rolling bearing 76, and the second shoulder 16 inside the lower end of the transmission cam 10 is used to limit the second rolling bearing 80. The transmission cam 10 is rotatably fixed in the housing 30 by the first rolling bearing 76 and the second rolling bearing 80. A sealed environment is formed inside the transmission cam 10, which easily preserves lubricating oil or grease for friction lubrication, greatly improving durability.

[0159] The inner wall of the hollow cavity 18 of the transmission cam 10 is provided with a guide rail 12, which serves as the guide structure for the cam follower 22. The cam follower 22 moves along the guide rail 12 and has both rotational and axial motion. The vibration damping device converts the rotational motion of the cam drive mechanism 50 into the axial motion of the cam drive shaft 21 through the guide rail 12, thereby achieving control of the wheel ends and the vehicle height. Fasteners can also be provided between the transmission cam 10 and the motor stator 51 to prevent movement between them.

[0160] Reference Figures 14 to 16As shown, the upper end of the guide rod 40 is provided with a guide rod threaded portion 44, which mates with the first end cover internal thread 335 of the first end cover 33 to fix it on the first end cover 33. The lower end of the guide rod 40 is inserted into the guide cavity 211 of the cam drive shaft 21. The guide rod 40 is provided with a gas channel 41, which is used to maintain the air pressure balance between the air pressure in the guide cavity 211 of the cam drive shaft 21 and the air pressure in the hollow cavity 18 of the transmission cam 10. The lower end of the cam drive shaft 21 has a guide rod first internal threaded portion 45, which is used to fix and connect with the second spring rubber pad 83 and the lower fork arm 73 by bolts or other fasteners. The upper ends of the cam drive shaft 21 have guide rod second internal threaded portions 46 on both sides for connecting with the cam follower 22. The cam follower 22 is a bolt-like structure, which is fixed to the cam drive shaft 21 by external threads and the guide rod first internal threaded portion 45. The end of the cam follower 22 is also provided with a rolling bearing, which rolls within the guide rail 12 to reduce friction. To prevent the cam drive shaft 21 from colliding with the second end cover 34, a buffer block 81 is also provided on the second end cover 34.

[0161] The housing 30 of the vibration damping device is fixed to the vehicle body and remains stationary. When the cam drive mechanism 50 is energized, the motor stator 51 drives the motor mover 52 to rotate. The rotation of the motor mover 52 drives the transmission cam 10 to rotate around the axis of the cam body 11. The upper and lower ends of the cam body 11 are limited by the first rolling bearing 76 and the second rolling bearing 80, so the transmission cam 10 can only rotate and cannot move along the axis of the cam body 11. During the rotation of the transmission cam 10, the guide rail 12 rotates synchronously. Because the guide rail 12 has a helical structure, the normal to the contact surface between the guide rail 12 and the cam follower 22 is not along the axial, radial, or circumferential direction, but rather has a pressure angle with plane E. This pressure angle allows the force exerted by the transmission cam 10 on the cam follower 22 to be decomposed into two mutually perpendicular components: axial and circumferential. For the circumferential force, the cam follower 22 can be driven to rotate in the plane of the transmission cam 10, which is perpendicular to the axis of the cam body 11. The cam follower 22 is fixed to the cam drive shaft 21, which is fixedly connected to the lower fork arm 73. The lower fork arm 73, connected to the wheel end, does not rotate, preventing the cam drive shaft 21 from rotating in-plane, and consequently, the cam follower 22. Axial forces drive the cam follower 22 to move axially; this axial movement of the cam follower 22 then drives the cam drive shaft 21 to move axially. The axial movement of the cam drive shaft 21 is transmitted to the wheel end via the lower fork arm 73, thereby adjusting the vehicle height. The damping device can adjust the vehicle height by controlling the rotational movement of the cam drive mechanism 50, achieving active damping.

[0162] In this embodiment, the cooperation of the cam follower 22, the cam drive shaft 21, and the guide rail 12 of the transmission cam 10 can convert the rotational motion of the transmission cam 10 around the rotation center into the linear motion of the cam drive shaft 21. At the same time, the guide rail 12 can always maintain close contact with the cam follower 22 without separation. There is no gap between the guide rail 12 and the cam follower 22 that causes idle stroke, which can avoid the impact and wear of the guide rail 12 and the cam follower 22, reduce noise impact, and make the response faster.

[0163] Driven by the cam drive mechanism 50, the transmission cam 10 can rotate in one direction. The cam follower 22 completes a full spiral structure along the guide rail 12, achieving the maximum axial displacement. This allows for effective active control to achieve low-frequency, large-amplitude z-axis vibration reduction along the axis of the cam body 11. By controlling the forward and reverse rotation of the cam drive mechanism 50, high-frequency, small-amplitude z-axis vibration reduction can be achieved. This vibration reduction device can meet various operating conditions, making it simple in structure, lightweight, easy to operate, and providing good operational stability and ride comfort.

[0164] Smooth sections 122 are provided at both ends of the guide rail 12. When the cam follower 22 slides within the smooth section 122, the cam follower 22 will not bear the axial driving force from the transmission cam 10, and the cam drive shaft 21 and the lower fork arm 73 will not move axially. That is, when the transmission cam 10 rotates to the smooth section 122, it can achieve axial locking without an additional locking mechanism, thus enabling the vehicle to hover at a certain height.

[0165] The vibration damping device of this embodiment can perform bidirectional active control and has a faster response. Integrating the cam drive mechanism 50 and the transmission cam 10 into one unit greatly reduces the size of the vibration damping device, improves space utilization, increases its layout advantages in vehicles, and broadens its applicability. The vibration damping device uses a mechanical structure to achieve its damping function, which can significantly reduce airtightness requirements and has a relatively short response time. Because the helix angle of the second helical segment is relatively large along the axial direction of the cam body 11, the axial movement speed can be greatly increased at the same rotational speed of the transmission cam 10. It also has the advantages of low assembly difficulty, small size, and the ability to achieve hovering functionality.

[0166] This application provides a suspension system, which includes the damping device as described above.

[0167] The suspension system using the above-mentioned damping device also has the advantages of the above-mentioned shock absorber, which will not be repeated in the embodiments of this application.

[0168] Optionally, the suspension system also includes a main control unit, which is electrically connected to the cam drive mechanism 50 of the damping device. The main control unit is used to control the operation of the cam drive mechanism 50 according to the road surface information of the vehicle body.

[0169] In this embodiment, the main control unit is used to control the cam drive mechanism 50 to work according to the road surface information of the vehicle body, thereby realizing active control of the cam drive mechanism 50 to adjust the movement of the transmission cam 10. The suspension system is active damping, which enables the suspension system to adapt to different working conditions and improve ride comfort and handling.

[0170] This application also discloses a vehicle, which includes a vehicle body and a shock-absorbing device as described above, wherein the vehicle body is provided with the shock-absorbing device; or, the vehicle includes a vehicle body and a suspension system as described above, wherein the vehicle body is provided with the suspension system.

[0171] In the vehicle of this application embodiment, the suspension system is an active damping system, which enables the suspension system to adapt to different operating conditions, improve ride comfort and handling, and thus increase user satisfaction. Furthermore, the damping device also has the advantages of small size and the ability to achieve hovering function, increasing the advantages of vehicle layout.

[0172] In this embodiment, the transmission cam 10, the damping device, the suspension system, and the vehicle can be referenced to each other and have the same or similar beneficial effects as any of the aforementioned transmission cam 10, damping mechanism, and suspension system. To avoid repetition, they will not be described again here.

[0173] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0174] The various embodiments in this specification are described in a related manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0175] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention are included within the scope of protection of the present invention.

Claims

1. A vibration damping device characterized by comprising: The transmission cam (10) is provided with a guide structure. The transmission cam (10) is provided with a guide structure. The transmission cam (10) is provided with a guide structure.

2. The vibration damping device according to claim 1, characterized by The transmission cam (10) is provided with a guide structure.

3. The vibration damping device according to claim 1, characterized by The transmission cam (10) is provided with a guide structure. The guide structure includes a guide rail (12) arranged on the inner wall of the hollow cavity (18), and the guide rail (12) extends in a spiral structure around the axis of the cam body (11).

4. The vibration damping device according to claim 3, characterized by The guide rail (12) includes a spiral segment (121) extending along the axis direction of the cam body (11); when the execution assembly (20) moves in the spiral segment (121), the execution assembly (20) moves along the axis direction of the cam body (11).

5. The vibration damping device according to claim 4, characterized by Along the axis direction of the cam body (11), the spiral segment (121) includes a first spiral segment, a second spiral segment and a third spiral segment connected in sequence, and the second spiral segment is located in the middle of the spiral segment (121). A plane (E) is perpendicular to the axis direction of the cam body (11), the included angle between the second spiral segment and the plane (E) is greater than the included angle between the first spiral segment and the plane (E), and the included angle between the third spiral segment and the plane (E).

6. The vibration damping device according to claim 5, characterized by The included angle between the second spiral segment and the plane (E) ranges from 25° to 35°.

7. The vibration damping device according to claim 5, characterized by The first spiral segment is gradually reduced in the included angle with the plane (E) in the direction away from the second spiral segment; and / or, The third spiral segment is gradually reduced in the included angle with the plane (E) in the direction away from the second spiral segment.

8. The vibration damping device according to claim 4, characterized by The guide rail (12) further includes a smooth segment (122) arranged at least one end of the spiral segment (121). A plane (E) is perpendicular to the axis direction of the cam body (11), the included angle between the smooth segment (122) and the plane (E) is A, and 0°≤A≤5° is satisfied.

9. The vibration damping device according to claim 8, characterized by When the execution assembly (20) moves in the smooth segment (122), the execution assembly (20) stops moving in the axis direction of the cam body (11).

10. The vibration damping device according to claim 8, characterized by The guide rail (12) is recessed in the radial direction of the cam body (11).

11. The vibration damping device according to claim 3, characterized by The inner wall of the hollow cavity (18) is further provided with a guide groove (13), one end of the guide groove (13) is connected with the guide rail (12), and the other end of the guide groove (13) extends to the end face of the cam body (11) in the direction away from the guide rail (12).

12. The vibration damping device according to claim 3, characterized by The execution assembly (20) further includes a cam transmission shaft (21), one end of the cam transmission shaft (21) is arranged in the hollow cavity (18), and the other end of the cam transmission shaft (21) extends out of the hollow cavity (18) and is adapted to be connected with a component to be damped.

13. The vibration damping device according to claim 12, characterized by The execution assembly (20) further comprises a cam follower (22), one end of the cam follower (22) is in driving connection with the guide rail (12), and the other end of the cam follower (22) is connected with the cam transmission shaft (21).

14. The vibration damping device according to claim 13, characterized by The cam follower (22) is provided with a rolling part, and when the cam transmission shaft (21) moves along the axis direction of the transmission cam (10), the rolling part rolls relative to the guide rail (12).

15. The vibration damping device of claim 13, wherein At least part of the cam follower (22) is arranged in the guide rail (12).

16. The vibration damping device of claim 13, wherein The guide rail (12) is two, and the two guide rails (12) form a double helix structure.

17. The vibration damping device of claim 16, wherein The cam follower (22) is provided with two, and the two cam followers (22) are coaxially arranged.

18. The vibration damping device of claim 12, wherein The cam transmission shaft (21) and the transmission cam (10) are coaxially arranged.

19. The vibration damping device of claim 12, wherein The cam transmission shaft (21) is provided with a guide cavity (211), and the damping device further comprises a guide rod (40), and the guide rod (40) is adapted to be connected with a fixing member; the guide cavity (211) and the guide rod (40) are both arranged along the axis direction of the transmission cam (10), and at least part of the guide rod (40) is arranged in the guide cavity (211).

20. The vibration damping device of claim 19, wherein The guide rod (40) is provided with a gas passage (41), and the gas passage (41) has a first opening (43) and a second opening (42), the first opening (43) is in communication with the guide cavity (211), and the second opening (42) is in communication with the hollow cavity (18).

21. The vibration damping device of claim 20, wherein The gas passage (41) has a first section channel extending along the axis direction of the transmission cam (10), and a second section channel extending along the diameter direction of the transmission cam (10), and the first section channel and the second section channel are in communication; The end of the first section channel away from the second section channel is provided with the first opening (43), and the end of the second section channel away from the first section channel is provided with the second opening (42).

22. The vibration damping device of claim 21, wherein One end of the guide rod (40) is inserted into the guide cavity (211), and the end face of one end of the guide rod (40) is provided with the first opening (43).

23. The vibration damping device of claim 21, wherein The end face of the cam transmission shaft (21) away from the part to be damped is provided with the cavity opening of the guide cavity (211); the guide rod (40) is inserted into the guide cavity (211) through the cavity opening of the guide cavity (211).

24. The vibration damping device of claim 19, wherein The end of the guide rod (40) away from the cam transmission shaft (21) is connected with the fixing member.

25. The vibration damping device of claim 24, wherein The guide rod (40) and the cam transmission shaft (21) are coaxially arranged, and the guide cavity (211) and the cam transmission shaft (21) are coaxially arranged.

26. The vibration damping device of claim 19, wherein The damping device further comprises a guide rod sliding bearing (71), and is arranged between the cam transmission shaft (21) and the guide rod (40).

27. The vibration damping device of claim 19, wherein The damping device further comprises a cam driving mechanism (50); the cam driving mechanism (50) is connected with the transmission cam (10); the cam driving mechanism (50) is used for driving the transmission cam (10) to rotate, so as to drive the execution assembly (20) to move along the axis direction of the transmission cam (10).

28. The vibration damping device of claim 27, wherein The cam driving mechanism (50) is coaxially arranged with the transmission cam (10).

29. The vibration damping device of claim 27, wherein The cam driving mechanism (50) is arranged outside the transmission cam (10).

30. The vibration damping device of claim 29, wherein The cam driving mechanism (50) is a driving motor; the driving motor comprises a motor stator (51) and a motor rotor (52). The motor rotor (52) is arranged outside the transmission cam (10) and is connected with the transmission cam (10). The motor stator (51) is arranged outside the motor rotor (52) in a spaced manner.

31. The vibration damping device of claim 27, wherein The damping device further comprises a detection element (60), which is used for detecting the position of the execution assembly (20).

32. The vibration damping device of claim 31, wherein The detection element (60) is a resolver sensor, which comprises a resolver sensor stator (61) and a resolver sensor rotor (62). The resolver sensor rotor (62) is arranged outside the transmission cam (10) and is connected with the transmission cam (10). The resolver sensor stator (61) is connected with a fixing member and is arranged outside the resolver sensor rotor (62) in a spaced manner.

33. The vibration damping device of claim 31, wherein The detection element (60) is connected with the end of the transmission cam (10) which is away from the component to be damped.

34. The vibration damping device of claim 31, wherein The shell (30) of the damping device is formed as a fixing member, and is provided with a containing cavity, in which the transmission cam (10), the cam driving mechanism (50) and the detection element (60) are arranged.

35. The vibration damping device of claim 34, wherein The shell (30) comprises a first end cover (33), a first shell segment (31), a second shell segment (32) and a second end cover (34), which are sequentially connected to enclose the containing cavity along the axis direction of the transmission cam (10).

36. The vibration damping device of claim 35, wherein Along the axis direction of the transmission cam (10), the end surface of one end of the transmission cam (10) is provided with a first cavity opening, and the end surface of the other end of the transmission cam (10) is provided with a second cavity opening; the transmission cam (10) is provided with a first matching structure at the first cavity opening and a second matching structure at the second cavity opening. The first matching structure is rotatably matched with the first end cover (33), and the second matching structure is rotatably matched with the second end cover (34).

37. The vibration damping device of claim 35, wherein At least part of the detection element (60) is located between the first end cover (33) and the first shell segment (31).

38. The vibration damping device of claim 35, wherein The first section of the shell (31) has a larger diameter than the second section of the shell (32), the cam driving mechanism (50) and one end of the transmission cam (10) are arranged in the first section of the shell (31), and the other end of the transmission cam (10) is arranged in the second section of the shell (32).

39. The vibration damping device of claim 35, wherein The end of the guide rod (40) away from the cam transmission shaft (21) is connected with the first end cover (33).

40. The vibration damping device of claim 35, wherein The end of the cam transmission shaft (21) away from the transmission cam (10) penetrates the accommodating cavity through the second end cover (34).

41. The vibration damping device of claim 35, wherein The first end cover (33) is provided with a wire outlet and a cooling pipeline placement opening.

42. The vibration damping device of claim 35, wherein The damping device further comprises a damping spring (74) and a second spring rubber pad (83), and a stepped surface is formed between the first section of the shell (31) and the second section of the shell (32). The second spring rubber pad (83) is arranged in a spaced manner with the stepped surface, and the second spring rubber pad (83) is connected with the end of the cam transmission shaft (21) that penetrates the transmission cam (10). One end of the damping spring (74) abuts against the stepped surface, and the other end of the damping spring (74) abuts against the second spring rubber pad (83).

43. A suspension system characterized by, The suspension system comprises the damping device according to any one of claims 1-42.

44. A vehicle characterized by The vehicle comprises a vehicle body and the damping device according to any one of claims 1-42, and the vehicle body is provided with the damping device; or, The vehicle comprises a vehicle body and the suspension system according to claim 43, and the vehicle body is provided with the suspension system. The vehicle comprises a vehicle body and the damping device according to any one of claims 1-42, and the vehicle body is provided with the damping device; or, The vehicle comprises a vehicle body and the suspension system according to claim 43, and the vehicle body is provided with the suspension system.

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