Vibration damping device, suspension system, and vehicle

Abstract

A vibration damping device (100), a suspension system, and a vehicle. The vibration damping device comprises a transmission cam (10) and an actuation assembly (20); the transmission cam is provided with a guide structure; and the actuation assembly works in concert with the guide structure for transmission, and when the transmission cam moves, the actuation assembly is driven to move in the axial direction of the transmission cam. The vibration damping device has a simple structure, strong adjustment capability, and fast response speed.

Description

Damping device, suspension system and vehicle

[0001] The present application claims priority to the Chinese patent application No. 202411400409.2, filed on September 30, 2024, the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present disclosure relates to the technical field of vehicle components, in particular to a damping device, a suspension system and a vehicle. BACKGROUND

[0003] The damping device is one of the important components in the suspension system of a vehicle, and is mainly used to improve the ride comfort of the vehicle. At present, the damping device usually uses the flow of working medium (liquid or gas) to passively buffer and dampen. SUMMARY

[0004] The present disclosure provides a damping device, a suspension system and a vehicle to solve the technical problem that the flow of working medium is used to passively buffer and dampen in the damping device in the related art, the flow of working medium needs time, resulting in long response time and complex structure of the damping device.

[0005] In a first aspect, a damping device is provided, which includes a transmission cam and an execution assembly, the transmission cam is provided with a guide structure; the execution assembly cooperates with the guide structure to transmit power, and the transmission cam drives the execution assembly to move along the axis direction of the transmission cam when the transmission cam moves.

[0006] In a second aspect, a suspension system is provided, which includes the damping device described above.

[0007] In a third aspect, a vehicle is provided, which includes a vehicle body and the damping device described above, and the vehicle body is provided with the damping device; or the vehicle includes a vehicle body and the suspension system described above, and the vehicle body is provided with the suspension system.

[0008] In the damping device in some embodiments of the present disclosure, the execution assembly cooperates with the guide structure to transmit power, and the transmission cam drives the execution assembly to move along the axis direction of the transmission cam when the transmission cam moves. The movement of the execution assembly drives the component to be damped connected with the execution assembly to move along the axis direction of the transmission cam, thereby achieving damping. The damping device realizes damping through the cooperation of the guide structure in the transmission cam and the execution assembly to transmit power, and has the advantages of stronger adjustment ability, faster response speed and simpler structure by realizing damping through mechanical structure.

[0009] The above description is only a summary of the technical solutions of the present disclosure. In order to enable a clearer understanding of the technical means of the present disclosure, the following specific embodiments of the present disclosure are described in accordance with the content of the description, and in order to make the above and other purposes, features and advantages of the present disclosure more obvious and easy to understand, the following specific embodiments of the present disclosure are described. BRIEF DESCRIPTION OF DRAWINGS

[0010] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure or related technical solutions, the following will briefly introduce the drawings needed to be used in the embodiments.

[0011] Fig. 1 is a structural diagram of a damping device according to some embodiments;

[0012] Fig. 2 is a top view of a damping device according to some embodiments;

[0013] Fig. 3 is a sectional view along line A1-A1 in Fig. 2;

[0014] Fig. 4 is a structural diagram of a first end cover according to some embodiments;

[0015] Fig. 5 is a sectional view of a first end cover according to some embodiments;

[0016] Fig. 6 is a structural diagram of a rotary variable differential transformer according to some embodiments;

[0017] Fig. 7 is a structural diagram of a fixing member according to some embodiments;

[0018] Fig. 8 is a structural diagram of a transmission cam and a cam driving mechanism according to some embodiments;

[0019] Fig. 9 is a sectional view of a transmission cam and a cam driving mechanism according to some embodiments;

[0020] Fig. 10 is a schematic diagram of a helical first angle according to some embodiments;

[0021] Fig. 11 is a schematic diagram of a helical second angle according to some embodiments;

[0022] Fig. 12 is a schematic diagram of a helical third angle according to some embodiments;

[0023] Fig. 13 is a local enlarged view of part C in Fig. 12;

[0024] Fig. 14 is a structural diagram of a guide rod and a cam transmission shaft according to some embodiments;

[0025] Fig. 15 is a top view of a guide rod and a cam transmission shaft according to some embodiments;

[0026] Fig. 16 is a sectional view along line B-B in Fig. 15;

[0027] FIG. 17 is a block diagram of a suspension system, according to some embodiments;

[0028] FIG. 18 is a block diagram of a vehicle, according to some embodiments;

[0029] FIG. 19 is a block diagram of another vehicle, according to some embodiments. 10 - drive cam; 11 - cam body; 12 - guide rail; 121 - helical section; 122 - smooth section; 13 - guide groove; 14 - drive cam stop; 15 - first shaft shoulder; 16 - second shaft shoulder; 18 - hollow cavity; 20 - actuation assembly; 21 - cam drive shaft; 211 - guide cavity; 22 - cam follower; 30 - housing; 31 - first section of housing; 32 - second section of housing; 33 - first end cap; 34 - second end cap; 331 - first end cap water inlet / outlet; 332 - first end cap arcuate through hole; 333 - first end cap bolt post; 334 - first end cap threaded through hole; 335 - first end cap internal threads; 336 - first stop; 337 - second stop; 40 - guide rod; 41 - gas passage; 42 - second opening; 43 - first opening; 44 - guide rod threaded section; 45 - guide rod first internal threaded section; 46 - guide rod second internal threaded section; 50 - cam drive mechanism; 51 - motor stator; 511 - motor busbar; 512 - motor winding; 513 - stator core; 514 - motor insulation frame; 515 - motor flat key feature; 52 - motor rotor; 60 - detection element; 61 - rotary variable transducer sensor stator; 611 - sensor groove; 612 - sensor first through hole; 613 - sensor first boss; 614 - sensor connection wire; 62 - rotary variable transducer sensor rotor; 621 - sensor mounting section; 622 - sensor second boss; 71 - guide rod plain bearing; 73 - lower fork arm; 74 - shock absorbing spring; 76 - first rolling bearing; 77 - sensor fixing member; 771 - sensor fixing member through hole; 772 - sensor fixing member groove; 773 - sensor fixing member boss; 774 - sensor fixing member tray; 78 - first spring rubber pad; 79 - drive shaft plain bearing; 80 - second rolling bearing; 81 - bumper block; 82 - dust shield; 83 - second spring rubber pad; E - plane. DETAILED DESCRIPTION

[0030] Exemplary embodiments of the present disclosure will be described more fully hereinafter with reference to the accompanying drawings. While example embodiments of the present disclosure are shown in the drawings, it is to be understood that the present disclosure can be embodied in various forms without being limited by the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the present disclosure to those skilled in the art.

[0031] The damping device is part of a suspension system, and the main function of the damping device is to reduce the bump and vibration during the driving of the vehicle, and to improve the ride comfort and the vehicle handling stability. The working principle of the damping device is to absorb and dissipate the energy caused by the uneven road surface, thereby reducing the up-and-down bouncing of the vehicle body.

[0032] Currently, the damping device usually uses the flow of working medium (liquid or gas) to passively buffer and dampen. Since the flow of the working medium takes time, the response time of the damping device is long and the structure is complex.

[0033] Based on this, some embodiments of the present disclosure provide a damping device as shown in FIG. 3, which includes a transmission cam 10 and an execution assembly 20, the transmission cam 10 is provided with a guide structure; the execution assembly 20 is matched with the guide structure for transmission, and the transmission cam 10 drives the execution assembly 20 to move along the axis direction of the transmission cam 10 when the transmission cam 10 moves.

[0034] In the damping device 100 of some embodiments of the present disclosure, the execution assembly 20 is matched with the guide structure for transmission, and the transmission cam 10 drives the execution assembly 20 to move along the axis direction of the transmission cam 10 when the transmission cam 10 moves. The movement of the execution assembly 20 will drive the component to be damped connected with the execution assembly 20 to move along the axis direction of the transmission cam 10, thereby realizing damping.

[0035] The damping device realizes damping through the matched transmission of the guide structure in the transmission cam 10 and the execution assembly 20, and has the advantages of stronger adjustment ability and faster response speed through the mechanical structure to realize damping.

[0036] In some embodiments, the transmission cam 10 is sleeved on the outside of the execution assembly 20, and the transmission cam 10 can protect the matched transmission of the execution assembly 20 and the guide structure to ensure the damping function of the damping device.

[0037] In some embodiments, referring to FIG. 9, the transmission cam 10 includes a cam body 11 provided with a hollow cavity 18; the guide structure includes at least one 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. The execution assembly 20 moves in the guide rail 12, and the execution assembly 20 moves along the axis direction of the transmission cam 10 when the transmission cam 10 moves, thereby realizing damping.

[0038] Referring to FIG. 9, along the axis direction of the transmission cam 10, the end faces of both ends of the transmission cam 10 are provided with cavity openings of the hollow cavity 18, and the hollow cavity 18 communicates with the outside of the transmission cam 10 through the two cavity openings.

[0039] In some embodiments of the present disclosure, the inner wall of the hollow cavity 18 is provided with a guide rail 12, when the transmission cam 10 rotates, the execution assembly 20 moves in the guide rail 12 and moves along the axis direction of the transmission cam 10 to achieve vibration reduction. The rotation of the transmission cam 10 causes the execution assembly 20 to move to achieve vibration reduction, which realizes vibration reduction for the mechanical structure, and has the advantages of stronger adjustment ability and faster response speed.

[0040] In some embodiments, referring to FIGS. 10-12, the guide rail 12 includes a spiral segment 121 extending along the axis direction of the cam body 11, and 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.

[0041] For example, the spiral segment 121 extends along the axis direction of the cam body 11, and 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 to achieve vibration reduction.

[0042] In some embodiments, 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, and the angle between the second spiral segment and the plane E is greater than the angle between the first spiral segment and the plane E, and greater than the angle between the third spiral segment and the plane E.

[0043] For example, when the execution assembly 20 moves in the spiral segment 121, it also moves along the axis direction of the cam body 11. In the case that the execution assembly 20 rotates by the same angle around the axis of the cam body 11, the execution assembly 20 moves in cooperation with the second spiral segment relative to the execution assembly 20 moving in cooperation with the first spiral segment and the third spiral segment, and the execution assembly 20 moves a greater distance along the axis direction of the cam body 11.

[0044] When the vibration reduction device does not perform vibration reduction, the execution assembly 20 cooperates with the second spiral segment and is located in the middle of the second spiral segment along the axis direction of the cam body 11. When the vibration reduction device performs vibration reduction, the execution assembly 20 moves from the middle of the second spiral segment, and the execution assembly 20 can quickly move a large distance along the axis direction of the cam body 11, and the execution assembly 20 can achieve fast vibration reduction response.

[0045] In some embodiments, the angle between the second spiral segment and the plane E is in the range of 25°-35°.

[0046] In some embodiments of the present disclosure, when the angle between the second spiral segment and the plane E is in the above range, the helix angle of the second spiral segment is larger, and the execution assembly 20 can better achieve fast vibration reduction response.

[0047] It can be understood that the present disclosure does not limit the angle between the second spiral segment and the plane E, for example, the angle between the second spiral segment and the plane E is one of 25°, 26°, 27°, 28°, 29°, 30°, 31°, 32°, 33°, 34°, 35°, and multiple angles between the above angles.

[0048] In some embodiments, the spiral segment 121 satisfies at least one of the following: along the first spiral segment in the direction away from the second spiral segment, the angle between the first spiral segment and the plane E gradually decreases; or, along the third spiral segment in the direction away from the second spiral segment, the angle between the third spiral segment and the plane E gradually decreases.

[0049] In some embodiments, the guide rail 12 further comprises a smooth segment 122 provided at at least one end of the spiral segment 121; a plane E is perpendicular to the axis direction of the cam body 11, and the angle A between the smooth segment 122 and the plane E satisfies: 0°≤A≤5°.

[0050] In the above structure implemented by the present disclosure, when the angle A between the smooth segment 122 and the plane E satisfies the above range, the execution assembly 20 basically stops moving in the axis direction of the cam body 11 when the execution assembly 20 slides in the smooth segment 122 of the guide rail 12, and the execution assembly 20 can realize hovering. Especially when the angle A between the smooth segment 122 and the plane E is 0°, the execution assembly 20 does not move in the axis direction of the cam body 11 when the execution assembly 20 slides in the smooth segment 122 of the guide rail 12, and hovering is better realized.

[0051] Referring to FIGS. 10 to 13, FIGS. 10 and 11 are schematic diagrams of the spiral structure from two perspectives, FIG. 12 is a schematic diagram of the spiral structure unfolded in a plane, and FIG. 13 is a partial enlarged view of part C in FIG. 12.

[0052] The plane E is shown in FIGS. 10 and 12, and it can be seen that the angle between the smooth segment 122 and the plane E is smaller than the angle between the spiral segment 121 and the plane E. The angle between the smooth segment 122 and the plane E can be referred to FIG. 13.

[0053] In some embodiments, 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, so that the transmission cam 10 can make the execution assembly 20 realize the hovering function, and the damping device can realize the autonomous hovering function.

[0054] In some embodiments, in order to make the execution assembly 20 better realize hovering, the angle A between the smooth segment 122 and the plane E gradually decreases from the end of the smooth segment 122 connected with 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 execution assembly 20 moves in the smooth segment 122, it first slows down and then hovers.

[0055] In some embodiments, a plane E is perpendicular to the axis of the cam body 11; along the direction of the axis of the cam body 11, the angle between the helical section 121 and the plane E gradually decreases from the middle of the helical section 121 to the end of the helical section 121.

[0056] In this case, when the execution assembly 20 rotates by the same angle around the axis of the cam body 11, the execution assembly 20 slides from the middle of the helical section 121 to the end of the helical section 121, the distance that the execution assembly 20 moves along the direction of the axis of the cam body 11 gradually decreases, the execution assembly 20 can achieve a rapid damping response, and can achieve deceleration.

[0057] In some embodiments, referring to FIG. 9, the guide rail 12 is formed in a radial recess of the cam body 11.

[0058] 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 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 a direction away from the guide rail 12. When installing the execution assembly 20, the execution assembly 20 is first moved along the guide groove 13 and then slidably connected with the guide rail 12, and the guide groove 13 is used to realize the installation of the execution assembly 20.

[0059] Referring to FIG. 9, one end of the guide groove 13 extends along the axis direction of the cam body 11, and the other end of the guide groove 13 is a curved section, which makes the guide groove 13 and the guide rail 12 smoothly connected.

[0060] In some embodiments, the at least one guide rail 12 includes two guide rails 12, and the two guide rails 12 form a double helix structure. At this time, the execution assembly 20 can slide along the two guide rails 12 at the same time, which has the advantage of more stable movement.

[0061] In an embodiment, the transmission cam 10 is provided with two guide rails 12 and guide grooves 13 which are mirror images relative to the axis of the cam body 11.

[0062] The two guide rails 12 form a double helix structure, and the guide rail 12 is adapted to be slidably connected with the execution assembly 20. Referring to FIGS. 10-13, the guide rail 12 corresponds to the movement range of the execution assembly 20 in the entire damping device during normal operation.

[0063] The guide rail 12 has a helical section 121 and a smooth section 122 arranged at both ends of the helical section 121, the angle between the smooth section 122 and the plane E is smaller than the angle between the helical section 121 and the plane E, and the angle A between the smooth section 122 and the plane E satisfies: 0°≤A≤5°.

[0064] Such structure is beneficial to quick response of the damping device and control at the upper and lower stroke limit positions. Because the speed of the damping device is close to zero at the upper and lower stroke limit positions, the external axial force reaches the maximum value, so the movement track at the position needs to be gentle, which can transfer the axial force with maximum efficiency and leave the track space for deceleration of the damping device. The two guide grooves 13 are assembly features, and the actuating assembly 20 is pushed into the transmission cam 10 and connected with the guide rail 12 through sliding.

[0065] In the transmission cam 10 of some embodiments of the present disclosure, rotation of the transmission cam 10 can make the actuating assembly 20 achieve damping, and the mechanical structure has the advantages of stronger adjustment ability and faster response speed.

[0066] When the actuating assembly 20 slides along the guide rail 12, it can slide upward or downward along the axis of the cam body 11 to achieve damping, which is bidirectional sliding damping and has a faster response. Moreover, the transmission cam 10 has the advantages of simple structure, mature processing technology and low cost.

[0067] In some embodiments, referring to FIGS. 3, 14 and 16, the actuating assembly 20 further comprises 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. The cam transmission shaft 21 can achieve transmission connection between the component to be damped and the transmission cam 10.

[0068] In some embodiments, the actuating assembly 20 further comprises at least one cam follower 22, one end of the cam follower 22 is matched with the guide rail 12 for transmission, and the other end of the cam follower 22 is connected with the cam transmission shaft 21.

[0069] In the above embodiments of the present disclosure, the cam transmission shaft 21 is matched with the guide rail 12 of the transmission cam 10 through the cam follower 22.

[0070] For example, the component to be damped can be a lower fork arm 73 (see FIG. 3), and the lower fork arm 73 is connected with a wheel end.

[0071] In the above structure of some embodiments of the present disclosure, the cam follower 22 can slide along the guide rail 12 to drive the cam transmission shaft 21 to move along the axis direction of the cam body 11, and the cam transmission shaft 21 drives the lower fork arm 73 to move when moving, so as to achieve damping and absorb bumps and impacts of the road surface, while keeping the wheel end in contact to ensure the stability and maneuverability of the vehicle.

[0072] In some embodiments, a rolling part is arranged on the cam follower 22, and the rolling part rolls relative to the guide rail 12 when the cam transmission shaft 21 moves along the axis direction of the transmission cam 10.

[0073] In the above structure of some embodiments of the present disclosure, the rolling part can reduce the friction of the cam follower 22 when sliding on the guide rail 12, so that the damping device better achieves damping.

[0074] In some embodiments, the rolling part is a rolling bearing, and the rolling bearing is slidingly connected to the guide rail 12. The rolling bearing can reduce the friction of the cam follower 22 when sliding on the guide rail 12, so that the damping device better achieves damping.

[0075] In some embodiments, the cam follower 22 arranged 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 achieve the function. Some embodiments of the present disclosure do not limit this.

[0076] For example, the cam follower 22 arranged at the end of the guide rail 12 is at least one of a cylindrical shape, a rectangular shape, a shuttle shape, and a conical body.

[0077] In some embodiments, at least part of the cam follower 22 is arranged in the guide rail 12. That is, the cam follower 22 is arranged according to the use requirement to reduce the gap between the cam transmission shaft 21 and the transmission cam 10, so that the structure of the damping device is more compact.

[0078] In some embodiments, the at least one cam follower 22 includes two cam followers 22, and the two cam followers 22 are coaxially arranged.

[0079] In some embodiments of the present disclosure, the end of the cam transmission shaft 21 extending into the hollow cavity 18 is connected with 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 respectively slide along the two guide rails 12 to drive the cam transmission shaft 21 to move along the axis direction of the cam body 11, which has the advantage of more stable movement.

[0080] In some embodiments, referring to FIG. 3, the cam transmission shaft 21 and the transmission cam 10 are coaxially arranged.

[0081] In some embodiments, referring to FIG. 3, FIG. 15 and FIG. 16, the cam transmission shaft 21 is provided with a guide cavity 211, and the damping device further includes a guide rod 40 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.

[0082] In the above structure of some embodiments of the present disclosure, the guide rod 40 can limit the movement trajectory of the cam transmission shaft 21, and improve the precision of the cam transmission shaft 21 and the damping device.

[0083] In some embodiments, referring to FIG. 16, the guide rod 40 is provided with a gas passage 41, the gas passage 41 is provided with a first opening 43 and a second opening 42, the first opening 43 is communicated with the guide cavity 211, and the second opening 42 is communicated with the hollow cavity 18; for example, the second opening 42 is communicated with the hollow cavity 18 outside the guide rod 40 and the cam transmission shaft 21.

[0084] In some embodiments of the present disclosure, the guide cavity 211 and the hollow cavity 18 are communicated through the gas passage 41, the second opening 42 and the first opening 43 of the guide rod 40, so as to maintain the air pressure balance of the guide cavity 211 and the hollow cavity 18, and avoid the air pressure change of the guide cavity 211 affecting the movement of the cam transmission shaft 21.

[0085] In some embodiments, the gas passage 41 is provided with a first section extending along the axis direction of the transmission cam 10, and a second section extending along the diameter direction of the transmission cam 10, the first section and the second section are communicated; the end of the first section away from the second section is provided with the first opening 43, and the end of the second section away from the first section is provided with the second opening 42.

[0086] In some embodiments, one end of the guide rod 40 is inserted into the guide cavity 211, and the end face of the one end of the guide rod 40 is provided with the first opening 43.

[0087] In some embodiments, referring to FIGS. 14 to 16, the second opening 42 is located at the end of the guide rod 40 away from the guide cavity 211.

[0088] In some embodiments, the end face of the cam transmission shaft 21 away from the component 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.

[0089] In some embodiments, the end of the guide rod 40 away from the cam transmission shaft 21 is connected with a fixing member.

[0090] In some embodiments, 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.

[0091] In some embodiments, referring to FIG. 3, the damping device 100 further comprises a guide rod sliding bearing 71, and the guide rod sliding bearing 71 is arranged between the cam transmission shaft 21 and the guide rod 40.

[0092] In some embodiments of the present disclosure, the guide rod sliding bearing 71 is used to reduce the friction between the guide rod 40 and the cam transmission shaft 21, and limit the positional relationship between the guide rod 40 and the cavity wall of the guide cavity 211, so that the cam transmission shaft 21 moves along the axis of the transmission cam 10, and the accuracy of the damping device is improved.

[0093] In some embodiments, referring to FIG. 3, the vibration damping device 100 further comprises a transmission shaft sliding bearing 79 fixedly connected to the housing 30, and the cam transmission shaft 21 is slidingly connected in the transmission shaft sliding bearing 79. The transmission shaft sliding bearing 79 is used to reduce the friction between the cam transmission shaft 21 and the housing 30, and limit the movement of the cam transmission shaft 21 along the axis of the transmission cam 10, thereby improving the accuracy of the vibration damping device.

[0094] In some embodiments, referring to FIG. 3, the vibration 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 configured to drive 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.

[0095] In some embodiments of the present disclosure, the transmission cam 10 is driven to rotate by the cam driving mechanism 50, so as to drive the execution assembly 20 to slide along the guide rail 12 to achieve vibration damping. The vibration damping device is an active vibration damping device, which actively adapts to different working conditions to improve the riding comfort and maneuverability.

[0096] In some embodiments, the cam driving mechanism 50 is coaxially arranged with the transmission cam 10, so as to stably drive the transmission cam 10 to rotate.

[0097] In some embodiments, the cam driving mechanism 50 is arranged outside the transmission cam 10. At this time, the cam driving mechanism 50 does not occupy the internal space of the transmission cam 10, so that the structure of the vibration damping device is more compact.

[0098] In some embodiments, referring to FIG. 3, 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 connected with the transmission cam 10; and the motor stator 51 is arranged outside the motor rotor 52 in a spaced manner.

[0099] For example, referring to FIG. 3 and FIG. 9, the motor stator 51 is arranged outside the motor rotor 52 in a spaced manner, for example, the motor stator 51 and the motor rotor 52 have a 1mm air gap, which ensures that the movement of the motor rotor 52 is not interfered by the motor stator 51, and at the same time ensures the electromagnetic interaction distance in the driving motor.

[0100] In some embodiments of the present disclosure, along the diameter direction of the transmission cam 10, the motor rotor 52 is arranged outside the transmission cam 10, and the motor stator 51 is arranged outside the motor rotor 52 in a spaced manner. The arrangement structure integrates the transmission cam 10 and the motor rotor 52, so that the vibration damping device is more compact, and the volume of the vibration damping device can be reduced.

[0101] In some embodiments, the cam driving mechanism 50 is a driving motor, which is arranged at one end of the transmission cam 10 and the guide rail 12 is arranged at the other end of the transmission cam 10; the driving motor comprises a motor stator 51 and a motor rotor 52, the motor stator 51 is connected with the shell 30 of the damping device; the motor rotor 52 is arranged at the outer side of the motor stator 51 in a spaced manner, and the transmission cam 10 is arranged at the outer side of the motor rotor 52 in a sleeved manner, and the transmission cam 10 is fixedly connected with the motor rotor 52.

[0102] For example, the motor rotor 52 is arranged at the outer side of the motor stator 51 in a spaced manner, which is also to ensure that the movement of the motor rotor 52 is not interfered by the motor stator 51, while ensuring the electromagnetic interaction distance in the driving motor.

[0103] In some embodiments of the present disclosure, along the diameter direction of the transmission cam 10, the motor rotor 52 is arranged at the outer side of the motor stator 51 in a spaced manner, and the transmission cam 10 is arranged at the outer side of the motor rotor 52 in a sleeved manner, which integrates the transmission cam 10 and the motor rotor 52, so that the damping device is more compact and the volume of the damping device can be reduced.

[0104] In some embodiments, the cam driving mechanism 50 is a driving motor, which is arranged outside the shell 30, and a rotating transmission shaft is arranged on the transmission cam 10, which is connected with the output end of the driving motor after extending out of the shell 30. The driving motor can also actively drive the transmission cam 10 to rotate, thereby achieving active damping.

[0105] In some embodiments, referring to FIG. 3, the damping device 100 further comprises a detection element 60, which is configured to detect the position of the execution assembly 20, so as to accurately control the moving distance of the execution assembly 20 along the axial direction of the cam body 11 in the case of determining the position of the execution assembly 20.

[0106] In some embodiments, referring to FIG. 3, the detection element 60 is a rotary variable displacement sensor, which comprises a rotary variable displacement sensor stator 61 and a rotary variable displacement sensor rotor 62; the rotary variable displacement sensor rotor 62 is arranged at the outer side of the transmission cam 10 and connected with the transmission cam 10; the rotary variable displacement sensor stator 61 is connected with the fixing member and arranged at the outer side of the rotary variable displacement sensor rotor 62 in a spaced manner.

[0107] In some embodiments of the present disclosure, along the diameter direction of the transmission cam 10, the rotary variable displacement sensor rotor 62 is arranged at the outer side of the transmission cam 10, and the rotary variable displacement sensor stator 61 is arranged at the outer side of the rotary variable displacement sensor rotor 62 in a spaced manner.

[0108] For example, the resolver sensor stator 61 and the resolver sensor rotor 62 have a gap of 1 mm, which can prevent the resolver sensor rotor 62 from rubbing against the resolver sensor stator 61 when the resolver sensor rotor 62 rotates, and can ensure that the resolver sensor stator 61 can sense the change in the magnetic field caused by the movement of the resolver sensor rotor 62.

[0109] In some embodiments, the detection element 60 is connected to the end of the transmission cam 10 away from the part to be damped.

[0110] In some embodiments, the housing 30 of the damping device is formed as a fixed part, and the housing 30 is provided with a receiving cavity in which the transmission cam 10, the cam driving mechanism 50, and the detection element 60 are arranged. This can protect and fix the transmission cam 10, the cam driving mechanism 50, and the detection element 60, and ensure the damping function and stable operation of the damping device.

[0111] In some embodiments, referring to FIGS. 1-3, the housing 30 includes a first end cover 33, a first section of the housing 31, a second section of the housing 32, and a second end cover 34. The first end cover 33, the first section of the housing 31, the second section of the housing 32, and the second end cover 34 are connected in sequence along the axis direction of the transmission cam 10 to enclose the receiving cavity.

[0112] In some embodiments, along the axis direction of the transmission cam 10, an end surface of one end of the transmission cam 10 is provided with a first cavity opening, and an 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.

[0113] In some embodiments of the present disclosure, the first matching structure and the second matching structure can be conventional rotating matching structures, such as the matching of a shaft shoulder and a bearing.

[0114] In some embodiments, at least part of the detection element 60 is located between the first end cover 33 and the first section of the housing 31, and the first end cover 33 and the first section of the housing 31 fix the detection element 60.

[0115] In some embodiments, the diameter of the first section of the housing 31 is greater than the diameter of the second section of the housing 32, the cam driving mechanism 50 and one end of the transmission cam 10 are arranged in the first section of the housing 31, and the other end of the transmission cam 10 is arranged in the second section of the housing 32. At this time, the diameter of the first section of the housing 31 and the diameter of the second section of the housing 32 are set according to the use requirements, which can make the structure of the damping device more compact.

[0116] In some embodiments, the end of the guide rod 40 away from the cam driving shaft 21 is connected to the first end cover 33.

[0117] In some embodiments, the end of the cam drive shaft 21 away from the drive cam 10 passes out of the accommodating cavity through the second end cover 34.

[0118] In some embodiments, referring to FIG. 3, the damping device 100 further comprises a damping spring 74 and a second spring rubber pad 83, a stepped surface is formed between the first section shell 31 and the second section shell 32; the second spring rubber pad 83 is arranged in a spaced-apart manner with the stepped surface, and the second spring rubber pad 83 is connected with the end of the cam drive shaft 21 extending out of the drive cam 10; one end of the damping spring 74 is in abutment with the stepped surface, and the other end of the damping spring 74 is in abutment with the second spring rubber pad 83.

[0119] In some embodiments of the present disclosure, the damping spring 74 can achieve auxiliary damping.

[0120] In some embodiments, referring to FIGS. 1 to 3, the shell body of the damping device comprises a first end cover 33, a first section shell 31, a second section shell 32, and a second end cover 34, which are coaxial and connected in sequence along the axis direction of the cam body 11.

[0121] The diameter of the first section shell 31 is greater than the diameter of the second section shell 32, and a first spring rubber pad 78 is arranged at the stepped position between the first section shell 31 and the second section shell 32.

[0122] The second end cover 34 and the second spring rubber pad 83 are arranged in a spaced-apart manner along the axis direction of the cam body 11, and the second spring rubber pad 83 is connected with the lower fork arm 73.

[0123] The damping spring 74 is sleeved on the second section shell 32, and the two ends of the damping spring 74 are fixedly connected with the first spring rubber pad 78 and the second spring rubber pad 83, respectively.

[0124] The first end cover 33, the first section shell 31, the second section shell 32, the second end cover 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 damping device comprises a resolver stator 61, a resolver rotor 62, a motor stator 51, a motor rotor 52, a guide rod 40, a drive cam 10, a cam drive shaft 21, and a cam follower 22.

[0125] For example, the connection structure of the shell body of the damping device is that the first end cover 33, the first section shell 31, the second section shell 32, and the second end cover 34 are connected in sequence along the axis direction of the cam body 11 to form a hard shell for bearing the weight of the vehicle body.

[0126] The first end cover 33, the first section of the shell 31, the second section of the shell 32, and the second end cover 34 can be connected by bolts or other fasteners. In order to achieve sealing, a sealant or other sealing means can also be used to ensure that the shell 30 is not contaminated by mud, dust, and other external contaminants.

[0127] For example, the sensor fixing part 77 is arranged between the first end cover 33 and the first section of the shell 31, and can share the bolts or other fasteners that connect the first end cover 33 and the first section of the shell 31.

[0128] The second section of the shell 32 and the first spring rubber pad 78 are connected by glue, electric welding, or a flat key.

[0129] The damping spring 74 is clamped 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 a limiting feature that cooperates with the damping spring 74 to prevent the damping spring 74 from rotating or deviating from the axis.

[0130] The dust cover 82 is arranged on the end of the cam transmission shaft 21 that protrudes out of the shell 30. One end of the dust cover 82 abuts against the second end cover 34, and the other end of the dust cover 82 abuts against the lower fork arm 73.

[0131] The lower fork arm 73 is spliced together with the second spring rubber pad 83 using a fixed connection or one-piece molding. The cam transmission shaft 21 passes through the second section of the shell 32, the first spring rubber pad 78, the second end cover 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 using bolts or other fasteners.

[0132] The cam transmission shaft 21 is arranged along the axis of the cam body 11. When the cam transmission shaft 21 moves along the axis of the cam body 11, the lower fork arm 73 also moves along the axis of the cam body 11 to achieve a damping function.

[0133] The upper end of the damping device is connected to the vehicle body through the first end cover bolt column on the first end cover 33. The lower end of the damping device is connected to the wheel end through the lower fork arm 73. The damping device not only supports the entire vehicle but also adjusts the height of the vehicle body.

[0134] For example, referring to Figures 4 and 5, the upper end of the first end cover 33 is provided with a first end cover bolt column 333 for connecting to the vehicle body. A first end cover threaded hole 334 is arranged around the outer edge of the first end cover 33 to facilitate the use of bolts or other fasteners to fix the first end cover 33, the first section of the shell 31, and the sensor fixing part 77.

[0135] The first end cover arc-shaped through hole 332 is used for the outgoing line of the sensor connecting line 614, the cam driving mechanism 50 and other wires, that is, the first end cover arc-shaped through hole 332 serves as the outgoing line port. The first end cover water inlet and outlet port 331 can be used for connecting with the water pipe outside to supply the inflow and outflow of the cooling medium for cooling the cam driving mechanism 50; the first end cover water inlet and outlet port 331 can also serve as the placement port of the cooling pipe.

[0136] 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 for fixing the motor stator 51 and limiting and fastening the motor stator 51.

[0137] Referring to FIG. 6, the resolver sensor rotor 62 has a sensor mounting part 621 and a sensor second boss 622 protruding inward from the resolver sensor rotor 62, and the sensor mounting part 621 and the sensor second boss 622 are used for cooperating with the transmission cam stop 14 on the upper end of the transmission cam 10, and the resolver sensor rotor 62 is synchronous with the transmission cam 10.

[0138] The resolver sensor stator 61 and the resolver sensor rotor 62 are concentrically and coplanarly installed while having a gap therebetween. The resolver sensor stator 61 has a sensor groove 611, a sensor first through hole 612 and a sensor first boss 613.

[0139] Referring to FIG. 7, the sensor fixing part 77 is used for connecting with the resolver sensor stator 61. The inner ring end of the sensor fixing part 77 is provided with a sensor fixing part tray 774, and the sensor fixing part tray 774 is provided with a sensor fixing part groove 772 and a sensor fixing part boss 773.

[0140] The sensor fixing part groove 772 is connected with the sensor first boss 613, and the sensor fixing part boss 773 is connected with the sensor first through hole 612. The outer ring end of the sensor fixing part 77 is provided with a sensor fixing part through hole 771, and the sensor fixing part through hole 771 is used for the fastener such as a bolt to pass through, so as to connect the sensor fixing part 77 between the first end cover 33 and the first section shell 31.

[0141] Referring to FIG. 3, FIG. 8 and FIG. 9, the motor rotor 52, the motor stator 51 and the transmission cam 10 are coaxially arranged, the motor rotor 52 is fixedly connected with the outer peripheral surface of the transmission cam 10, and the motor stator 51 is fixedly connected with the inner wall of the first section shell 31 through the motor key features 515 on the outer peripheral surface thereof.

[0142] The structure of the motor stator 51 is set according to the use requirement, and some embodiments of the present disclosure do not limit this, 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.

[0143] The upper end of the drive cam 10 is provided with a drive cam stop 14 for interference fit with the second boss 622 of the resolver sensor rotor 62.

[0144] The first shaft shoulder 15 inside the upper end of the drive cam 10 is used for limiting the first rolling bearing 76, and the second shaft shoulder 16 inside the lower end of the drive cam 10 is used for limiting the second rolling bearing 80.

[0145] The drive cam 10 is rotatably fixed in the housing 30 through the first rolling bearing 76 and the second rolling bearing 80, and a sealed environment is formed in the drive cam 10, which is easy to save lubricating oil or grease for friction lubrication, and greatly improves the durability.

[0146] The inner wall of the hollow cavity 18 of the drive cam 10 is provided with a guide rail 12, which is a guide structure of the cam follower 22. The cam follower 22 moves along the guide rail 12, and has both rotational movement and axial movement. The vibration damping device converts the rotational movement of the cam driving mechanism 50 into the axial movement of the cam transmission shaft 21 through the guide rail 12, and then controls the wheel end and the height of the vehicle body.

[0147] Fasteners can also be provided between the drive cam 10 and the motor stator 51 to prevent movement between them.

[0148] Referring to FIGS. 14-16, the upper end of the guide rod 40 is provided with a guide rod threaded portion 44 which cooperates with the first end cap inner thread 335 of the first end cap 33 to be fixed on the first end cap 33.

[0149] The lower end of the guide rod 40 is inserted into the guide cavity 211 of the cam transmission shaft 21. The guide rod 40 is provided with a gas passage 41 for maintaining the balance between the gas pressure in the guide cavity 211 of the cam transmission shaft 21 and the gas pressure in the hollow cavity 18 of the drive cam 10.

[0150] The lower end of the cam transmission shaft 21 has a guide rod first inner threaded portion 45 for fixed connection with the second spring rubber pad 83 and the lower fork arm 73 through bolts and other fasteners. The upper end of the cam transmission shaft 21 has guide rod second inner threaded portions 46 on both sides for connection with the cam follower 22.

[0151] The cam follower 22 is a structure similar to a bolt, which is fixed on the cam transmission shaft 21 through external threads and the guide rod first inner threaded portion 45. The end of the cam follower 22 is also provided with a rolling bearing which rolls in the guide rail 12 to reduce friction.

[0152] In some embodiments, in order to avoid the collision between the cam transmission shaft 21 and the second end cover 34, a buffer block 81 is further arranged on the second end cover 34.

[0153] The housing 30 of the damping device is fixed on the vehicle body, and the housing 30 is fixed. After the cam driving mechanism 50 is energized, the motor stator 51 drives the motor rotor 52 to rotate, and the motor rotor 52 drives the transmission cam 10 to rotate around the axis of the cam body 11. The upper end and the lower end of the cam body 11 are limited by the first rolling bearing 76 and the second rolling bearing 80, and the transmission cam 10 can only rotate and cannot move along the axis direction of the cam body 11. During the rotation of the transmission cam 10, the guide rail 12 rotates synchronously.

[0154] Since the guide rail 12 has a spiral structure, the normal line of the contact surface between the guide rail 12 and the cam follower 22 is not axial, radial, or circumferential, but has a pressure angle with the plane E.

[0155] The pressure angle allows the force of the transmission cam 10 on the cam follower 22 to be decomposed into two perpendicular components in the axial and circumferential directions. For the circumferential force, the cam follower 22 can be driven to rotate in the plane perpendicular to the axis of the cam body 11.

[0156] The cam follower 22 is fixed on the cam transmission shaft 21, and the cam transmission shaft 21 is fixedly connected with the lower fork arm 73. The lower fork arm 73 connected with the wheel end cannot rotate, which makes the cam transmission shaft 21 unable to rotate in the plane, and thus the cam follower 22 also cannot rotate in the plane. For the axial force, the cam follower 22 can be driven to move axially, and the axial movement of the cam follower 22 drives the cam transmission shaft 21 to move axially.

[0157] The axial movement of the cam transmission shaft 21 is transmitted to the wheel end through the lower fork arm 73, and then the height of the vehicle body is adjusted. The damping device can adjust the height of the vehicle body by controlling the rotational movement of the cam driving mechanism 50, and realize the active damping function.

[0158] In some embodiments of the present disclosure, the cooperation of the cam follower 22, the cam transmission shaft 21, and the guide rail 12 of the transmission cam 10 can convert the rotational movement of the transmission cam 10 around the rotation center into the linear movement of the cam transmission shaft 21. At the same time, the guide rail 12 can always maintain close contact with the cam follower 22 without separation, and there is no gap between the guide rail 12 and the cam follower 22 to cause the idle stroke. The impact and wear between the guide rail 12 and the cam follower 22 can be avoided, the noise influence is reduced, and the corresponding speed is faster.

[0159] The transmission cam 10 can be driven by the cam driving mechanism 50 to rotate in one direction, and the cam follower 22 can move along the guide rail 12 to complete a complete spiral structure to achieve the maximum amplitude of axial displacement, and the low-frequency large-amplitude z-direction (z-direction is the axial direction of the cam body 11) damping effect can be actively controlled.

[0160] The high-frequency small-amplitude z-direction damping effect can be achieved by controlling the forward and reverse rotation of the cam driving mechanism 50, and the damping requirements of various working conditions can be achieved by the damping device, so that the damping device has the advantages of simple structure, small mass, convenient operation, good control stability and riding comfort.

[0161] The guide rail 12 is provided with a smooth section 122 at both ends, and when the cam follower 22 slides in the smooth section 122, the cam follower 22 will not bear the axial driving force brought by the transmission cam 10, and the cam transmission shaft 21 and the lower fork arm 73 will not have axial movement.

[0162] That is, the transmission cam 10 rotates to the smooth section 122, and the axial locking can be achieved without additional locking mechanism, and the hovering function of the whole vehicle at a certain height can be achieved.

[0163] The damping device of some embodiments of the present disclosure can be actively controlled in two directions, and the response is faster. The cam driving mechanism 50 and the transmission cam 10 are integrated, which greatly reduces the volume of the damping device, improves the space utilization, increases the layout advantage on the vehicle, and has a wider application range.

[0164] The damping device uses a mechanical structure to achieve the damping function, which can greatly reduce the requirement for air tightness, and the response time is relatively short. Since the helix angle of the second spiral section is relatively large along the axial direction of the cam body 11, the axial movement speed can be greatly improved under the same speed of the transmission cam 10. It also has the advantages of low assembly difficulty, small size, and hovering function.

[0165] Some embodiments of the present disclosure provide a suspension system, as shown in FIG. 17, the suspension system 1000 comprises the damping device 100 as described above.

[0166] The suspension system 1000 uses the damping device 100 described above, and also has the advantages of the damping device described above, which will not be repeated here.

[0167] In some embodiments, the suspension system 1000 further comprises a master control unit, the master control unit is electrically connected with the cam driving mechanism 50 of the damping device 100, and the master control unit is used to control the cam driving mechanism 50 to work according to the road surface information of the road surface where the vehicle body is located.

[0168] In some embodiments of the present disclosure, the main control unit is configured to control the cam driving mechanism 50 according to the road surface information of the road surface on which the vehicle body is located, so as to actively control the operation of the cam driving mechanism 50, adjust the movement of the transmission cam 10, and make the suspension system actively damp, so that the suspension system can adapt to different working conditions, and the riding comfort and the handling performance are improved.

[0169] Some embodiments of the present disclosure also provide a vehicle, as shown in FIGS. 18 and 19, the vehicle 2000 includes a vehicle body 2001 and the above-mentioned damping device 100, the vehicle body 2001 is provided with the damping device 100; or, the vehicle 2000 includes a vehicle body 2001 and the above-mentioned suspension system 1000, the vehicle body 2001 is provided with the suspension system 1000.

[0170] In the vehicle 2000 of some embodiments of the present disclosure, the suspension system 1000 is actively damped, so that the suspension system 1000 can adapt to different working conditions, the riding comfort and the handling performance are improved, and the user's satisfaction is improved. Moreover, the damping device also has the advantages of small size and hover function, and increases the layout advantage of the vehicle.

[0171] In some embodiments of the present disclosure, the transmission cam 10, the damping device, the suspension system and the vehicle can be mutually referred to, and have the same or similar beneficial effects as any of the aforementioned transmission cam 10, damping mechanism, suspension system. In order to avoid repetition, details are not described here.

[0172] It should be noted that, in this document, the terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between the entities or operations.

[0173] Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment. Without more limitations, the element defined by the statement "including a" does not exclude the presence of another identical element in the process, method, article or equipment including the element.

[0174] Each embodiment in the specification is described in a relevant manner, and the same or similar parts between each embodiment can be referred to each other. Each embodiment focuses on the difference from other embodiments.

[0175] The above merely provides part of embodiments of the present disclosure, but is not intended to limit the protection scope of the present disclosure. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present disclosure shall be included in the protection scope of the present disclosure.

Claims

1. A damping device (100), comprising, a transmission cam (10) provided with a guide structure; an execution assembly (20) in transmission cooperation with the guide structure, the transmission cam (10) driving the execution assembly (20) to move along the axial direction of the transmission cam (10) when the transmission cam (10) moves.

2. The damping device (100) according to claim 1, wherein The transmission cam (10) is sleeved on the outside of the execution assembly (20).

3. The damping device (100) according to claim 1 or 2, wherein The transmission cam (10) comprises a cam body (11) provided with a hollow cavity (18); The guide structure comprises at least one guide rail (12) provided 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 damping device (100) according to claim 3, wherein The guide rail (12) comprises a spiral segment (121) extending along the axial direction of the cam body (11); when the execution assembly (20) moves in the spiral segment (121), the execution assembly (20) moves along the axial direction of the cam body (11).

5. The damping device (100) according to claim 4, wherein Along the axial direction of the cam body (11), the spiral segment (121) comprises 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 made perpendicular to the axial direction of the cam body (11), the angle between the second spiral segment and the plane (E) is greater than the angle between the first spiral segment and the plane (E), and the angle between the second spiral segment and the plane (E) is greater than the angle between the third spiral segment and the plane (E).

6. The damping device (100) according to claim 5, wherein The angle between the second spiral segment and the plane (E) ranges from 25° to 35°.

7. The damping device (100) according to claim 5 or 6, wherein The spiral segment (121) satisfies at least one of the following conditions: Along the first spiral segment in a direction away from the second spiral segment, the angle between the first spiral segment and the plane (E) decreases; or Along the third spiral segment in a direction away from the second spiral segment, the angle between the third spiral segment and the plane (E) decreases.

8. The damping device (100) according to any one of claims 4-7, wherein The guide rail (12) further comprises a smooth segment (122) provided at at least one end of the spiral segment (121); A plane (E) is made perpendicular to the axial direction of the cam body (11), the angle between the smooth segment (122) and the plane (E) is A, and A satisfies: 0°≤A≤5°.

9. The damping device (100) according to claim 8, wherein When the execution assembly (20) moves in the smooth segment (122), the execution assembly (20) stops moving in the axial direction of the cam body (11).

10. Damping device (100) according to claim 8 or 9, wherein The guide rail (12) is recessed in the radial direction of the cam body (11).

11. The damping device (100) according to any one of claims 3-10, wherein 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 a direction away from the guide rail (12).

12. The damping device (100) according to any one of claims 3-11, wherein The execution assembly (20) further comprises a cam transmission shaft (21), one end of the cam transmission shaft (21) is arranged in the hollow cavity (18), the other end of the cam transmission shaft (21) is located outside the hollow cavity (18) and is adapted to be connected with the part to be damped.

13. The damping device (100) according to claim 12, wherein The execution assembly (20) further comprises at least one cam follower (22), one end of the cam follower (22) is matched with the guide rail (12) for transmission, and the other end of the cam follower (22) is connected with the cam transmission shaft (21).

14. The vibration damping device (100) according to claim 13, wherein A rolling part is arranged on the cam follower (22), and the rolling part rolls relative to the guide rail (12) when the cam transmission shaft (21) moves along the axis direction of the transmission cam (10).

15. Damping device (100) according to claim 13 or 14, wherein At least part of the cam follower (22) is arranged in the guide rail (12).

16. The damping device (100) according to any one of claims 13-15, wherein The at least one guide rail (12) comprises two guide rails (12), and the two guide rails (12) form a double helix structure.

17. The damping device (100) according to claim 16, wherein The at least one cam follower (22) comprises two cam followers (22), and the two cam followers (22) are coaxially arranged.

18. The damping device (100) according to any one of claims 12-17, wherein The cam transmission shaft (21) and the transmission cam (10) are coaxially arranged.

19. The damping device (100) according to any one of claims 12-18, wherein The cam transmission shaft (21) is provided with a guide cavity (211), and the damping device (100) further comprises a guide rod (40) 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 damping device (100) according to claim 19, wherein The guide rod (40) is provided with a gas passage (41) having a first opening (43) and a second opening (42), the first opening (43) is communicated with the guide cavity (211), and the second opening (42) is communicated with the hollow cavity (18).

21. The damping device (100) according to claim 20, wherein The gas passage (41) has a first section extending along the axis direction of the transmission cam (10) and a second section extending along the diameter direction of the transmission cam (10), and the first section and the second section are communicated; An end of the first section away from the second section is provided with the first opening (43), and an end of the second section away from the first section is provided with the second opening (42).

22. The damping device (100) according to claim 21, wherein One end of the guide rod (40) is located in the guide cavity (211), and an end face of the one end of the guide rod (40) is provided with the first opening (43).

23. The damping device (100) according to claim 21 or 22, wherein An end face of the cam transmission shaft (21) away from the part to be damped is provided with a 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 damping device (100) according to any one of claims 19-23, wherein An end of the guide rod (40) away from the cam transmission shaft (21) is connected with the fixing member.

25. The damping device (100) according to 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 damping device (100) according to any one of claims 19-25, further comprising a guide rod sliding bearing (71), and the guide rod sliding bearing (71) is arranged between the cam transmission shaft (21) and the guide rod (40).

27. The damping device (100) according to any one of claims 19-26, further comprising a cam driving mechanism (50); the cam driving mechanism (50) is connected with the transmission cam (10); the cam driving mechanism (50) is configured to drive the transmission cam (10) to rotate, so as to drive the execution assembly (20) to move along the axial direction of the transmission cam (10).

28. The damping device (100) according to claim 27, wherein The cam driving mechanism (50) is coaxially arranged with the transmission cam (10).

29. The damping device (100) according to claim 27 or 28, wherein The cam driving mechanism (50) is sleeved outside the transmission cam (10).

30. The damping device (100) according to 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 sleeved outside the transmission cam (10) and connected with the transmission cam (10); The motor stator (51) is spaced apart from the motor rotor (52), and the motor stator (51) is sleeved outside the motor rotor (52).

31. The damping device (100) according to any one of claims 27-30, further comprising a detection element (60), and the detection element (60) is configured to detect the position of the execution assembly (20).

32. The damping device (100) according to claim 31, wherein The detection element (60) is a resolver sensor, and the resolver sensor comprises a resolver sensor stator (61) and a resolver sensor rotor (62); The resolver sensor rotor (62) is sleeved outside the transmission cam (10) and connected with the transmission cam (10); The resolver sensor stator (61) is connected with a fixed member; the resolver sensor stator (61) is spaced apart from the resolver sensor rotor (62), and the resolver sensor stator (61) is sleeved outside the resolver sensor rotor (62).

33. The damping device (100) according to claim 31 or 32, 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 damping device (100) according to any one of claims 31-33, wherein The housing (30) of the damping device (100) is formed as a fixed member, and the housing (30) is provided with a receiving cavity, and the transmission cam (10), the cam driving mechanism (50) and the detection element (60) are arranged in the receiving cavity.

35. The damping device (100) according to claim 34, wherein The housing (30) comprises a first end cover (33), a first section housing (31), a second section housing (32) and a second end cover (34), and the first end cover (33), the first section housing (31), the second section housing (32) and the second end cover (34) are sequentially connected along the axial direction of the transmission cam (10) to form the receiving cavity.

36. The damping device (100) according to claim 35, wherein An end face of one end of the transmission cam (10) is provided with a first cavity opening, and an end face of the other end of the transmission cam (10) is provided with a second cavity opening in the axial direction of the transmission cam (10); 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 damping device (100) according to claim 35 or 36, wherein At least part of the detection element (60) is located between the first end cover (33) and the first section of the shell (31).

38. The damping device (100) according to any one of claims 35-37, wherein The diameter of the first section of the shell (31) is greater than the diameter of the second section of the shell (32), one end of the transmission cam (10) and the cam driving mechanism (50) 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 damping device (100) according to any one of claims 35-38, 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 damping device (100) according to any one of claims 35-39, wherein The end of the cam transmission shaft (21) away from the transmission cam (10) penetrates out of the accommodating cavity through the second end cover (34).

41. The damping device (100) according to any one of claims 35-40, wherein The first end cover (33) is provided with a wire outlet and a cooling pipe placement opening.

42. The damping device (100) according to any one of claims 35-41, further comprising 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) extending out of 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 (1000) comprising the damping device (100) according to any one of claims 1-42.

44. A vehicle (2000) satisfying one of the following: The vehicle (2000) comprises: a vehicle body (2001), and the damping device (100) according to any one of claims 1-42; the vehicle body (2001) is provided with the damping device (100); or the vehicle (2000) comprises: a vehicle body (2001), and the suspension system (1000) according to claim 43; and the vehicle body (2001) is provided with the suspension system (1000).

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