Active suspension and vehicle

Abstract

The invention relates to the technical field of vehicle damping, and discloses an active suspension which comprises a supporting assembly, a driving assembly and a damper assembly. The supporting assembly is used for being connected to a vehicle body of the vehicle; the driving assembly comprises a hollow shaft motor and a sleeve, the hollow shaft motor is arranged on the supporting assembly, and a hollow shaft hole is formed in the hollow shaft motor; wherein the driving end of the hollow shaft motor is in driving connection with the sleeve, and the hollow space of the sleeve is communicated with the hollow shaft hole; the shock absorber assembly is used for being connected to a wheel assembly of the vehicle, and the shock absorber assembly comprises a cylinder barrel and a piston rod arranged on the cylinder barrel; wherein the cylinder barrel is in threaded connection with the sleeve, the piston rod penetrates through the hollow shaft hole to be fixed to the supporting assembly, and the cylinder barrel can reciprocate in the sleeve in the direction of the piston rod. The active suspension is simple in structure, and the installation space can be greatly reduced under the condition that high main power output is guaranteed. The invention further discloses a vehicle.

Description

Technical Field

[0001] This application relates to the field of vehicle vibration reduction technology, specifically to an active suspension and a vehicle. Background Technology

[0002] Currently, with the development of automotive technology, people have increasingly higher requirements for the comfort of car rides. During driving, because the ground in contact with the wheels is not a perfectly flat surface, the vehicle body inevitably vibrates. To mitigate this vibration, a suspension system is typically installed. The suspension system can bear the weight of the vehicle body and dampen the vibrations caused by uneven road surfaces, thus ensuring smooth vehicle operation.

[0003] To further ensure smooth vehicle operation, the suspension system adjusts the stiffness and damping coefficient of the shock absorbers in real time based on road conditions and driving status. Related active suspension technologies include hydraulic active dampers, linear motor active dampers, and ball screw active dampers. Hydraulic active dampers generate damping force based on fluid flow; linear motor active dampers adjust the damping force of the damper in real time by controlling the thrust of the motor; and ball screw active dampers adjust the damping force by converting rotational motion into linear motion.

[0004] In the process of implementing the embodiments of this disclosure, at least the following problems were found in the related art: In the aforementioned active suspension systems, hydraulic active dampers generally use solenoid valves as the drive actuators, which are complex in structure and expensive. In addition, the oil circuit is locked, resulting in a large damping force, making it difficult to filter high-frequency vibrations. If linear motor active dampers can achieve a high active force output, they require a large motor, which limits their installation space. Ball screw active dampers also have problems such as large local volume and limited installation space.

[0005] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this application, and therefore may include information that does not constitute prior art known to those skilled in the art. Summary of the Invention

[0006] To provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. This summary is not intended as a general commentary, nor is it intended to identify key / important components or describe the scope of protection of these embodiments, but rather as a prelude to the detailed description that follows.

[0007] This disclosure provides an active suspension and a vehicle with a simple structure that can greatly reduce the installation space and vehicle weight while ensuring high active force output.

[0008] In some embodiments, the active suspension includes a support assembly, a drive assembly, and a shock absorber assembly. The support assembly is connected to the vehicle body; the drive assembly includes a hollow shaft motor and a sleeve, the hollow shaft motor being disposed on the support assembly and having a hollow shaft hole; wherein the drive end of the hollow shaft motor is drivenly connected to the sleeve, and the hollow space of the sleeve communicates with the hollow shaft hole; the shock absorber assembly is connected to the vehicle wheel assembly, the shock absorber assembly including a cylinder and a piston rod disposed on the cylinder; wherein the cylinder and the sleeve form a ball screw mechanism, and the piston rod passes through the hollow shaft hole and is fixed to the support assembly, the cylinder being capable of reciprocating within the sleeve along the direction of the piston rod.

[0009] In some embodiments, the outer surface of the cylinder has a threaded section and a non-threaded section; wherein the threaded section of the screw and the sleeve constitute a ball screw mechanism, and the length of the threaded section of the screw is greater than the length of the sleeve.

[0010] In some embodiments, the sleeve engages with the threaded section of the lead screw via balls to form a ball screw mechanism.

[0011] In some embodiments, the support assembly includes an inner support platform, an outer support cylinder, and a buffer ring. The inner support platform houses the hollow shaft motor of the drive assembly, and the piston rod passes through the hollow shaft hole and is fixed to the inner support platform. The outer support cylinder is sleeved on the inner support platform. The buffer ring is disposed between the inner support platform and the outer support cylinder.

[0012] In some embodiments, the outer side of the inner support platform is provided with a snap-fit ​​structure, the inner side of the outer support cylinder is provided with a snap-fit ​​engagement structure, and the buffer ring is disposed between the snap-fit ​​structure and the snap-fit ​​engagement structure; wherein, a reserved hole is also provided on the inner support platform.

[0013] In some embodiments, the active suspension further includes: a housing assembly, the first end of which is sealed to the outer support cylinder of the support assembly, and the second end of which is sealed to the non-threaded section of the cylinder, so as to form a closed space between the housing assembly and the non-threaded section of the cylinder.

[0014] In some embodiments, the housing assembly includes a bladder, a first sleeve, and a second sleeve. The bladder has a first end that is sealed to the outer support sleeve of the support assembly; the first sleeve is fitted onto the non-threaded section of the cylinder barrel, and the second end of the bladder is sealed to the first sleeve; the second sleeve is fitted onto the outer surface of the bladder.

[0015] In some embodiments, the shock absorber assembly further includes a piston movably disposed within the cylinder, the piston being connected to the piston rod.

[0016] In some embodiments, the damper assembly further includes a guide and a floating piston. The guide is disposed within the cylinder; the floating piston is disposed within the cylinder; wherein the piston is disposed between the guide and the floating piston, and the piston rod passes through the guide.

[0017] In some embodiments, the vehicle includes: a body; an active suspension as described in the foregoing embodiments, wherein a support assembly of the active suspension is connected to the body; and wheel assemblies connected to the shock absorber assemblies of the active suspension.

[0018] The active suspension and vehicle provided in this disclosure can achieve the following technical effects: A hollow shaft motor is installed in the drive assembly, and the drive end of the hollow shaft motor is connected to the sleeve drive. The cylinder of the shock absorber assembly and the sleeve form a ball screw mechanism. In this way, the hollow shaft motor rotates the sleeve, which in turn drives the cylinder of the shock absorber assembly to rotate. Since the hollow shaft motor is fixed to the support assembly, the cylinder can move up and down on the sleeve. At the same time, the piston rod of the shock absorber assembly passes through the hollow shaft hole, which effectively shortens the vertical distance, thereby greatly reducing the installation space while ensuring high active force output.

[0019] Based on this, the piston rod is fixed to the support assembly, and the support assembly is used to connect to the vehicle body. In this way, the damping force of the shock absorber assembly can be directly transmitted to the support assembly, and high-frequency buffering is performed through the support assembly, thereby improving the comfort of the vehicle.

[0020] The above general description and the description below are exemplary and illustrative only and are not intended to limit this application. Attached Figure Description

[0021] One or more embodiments are illustrated by way of example with reference to the accompanying drawings. These illustrations and drawings do not constitute a limitation on the embodiments. Elements having the same reference numerals in the drawings are shown as similar elements. The drawings are not to be scaled. And wherein: Figure 1 This is a schematic diagram of an active suspension system provided in an embodiment of this disclosure; Figure 2 This is a schematic diagram of another active suspension system provided in this embodiment; Figure 3 This is a schematic diagram of another active suspension system provided in this embodiment; Figure 4 This is a schematic diagram of another active suspension system provided in this embodiment; Figure 5This is a schematic diagram of another active suspension system provided in this embodiment; Figure 6 This is a schematic diagram of another active suspension system provided in this embodiment; Figure 7 This is a schematic diagram of another active suspension provided in an embodiment of this disclosure.

[0022] Figure label: 10: Support component; 11: Inner support platform; 111: Snap-fit ​​structure; 112: Reserved hole; 12: Outer support cylinder; 121: Snap-fit ​​structure; 13: Buffer ring; 20: Drive assembly; 21: Hollow shaft motor; 211: Hollow shaft bore; 22: Sleeve; 30: Shock absorber assembly; 31: Cylinder; 311: Lead screw thread section; 312: Non-threaded section; 32: Piston; 33: Piston rod; 34: Guide; 35: Floating piston; 36: Bushing; 40: Housing assembly; 41: Shell; 42: First protective sleeve; 43: Second protective sleeve; 44: First retaining ring; 45: Second retaining ring; 46: Third retaining ring. Detailed Implementation

[0023] To provide a more detailed understanding of the features and technical content of the embodiments of this disclosure, the implementation of the embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. The accompanying drawings are for illustrative purposes only and are not intended to limit the embodiments of this disclosure. In the following technical description, for ease of explanation, several details are used to provide a full understanding of the disclosed embodiments. However, one or more embodiments may still be implemented without these details. In other cases, well-known structures and devices may be simplified in their depiction to simplify the drawings.

[0024] The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this disclosure are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this disclosure described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0025] In this disclosure, the terms "upper," "lower," "inner," "middle," "outer," "front," and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for better description of the embodiments of this disclosure and their implementations, and are not intended to limit the indicated devices, elements, or components to having a specific orientation, or to require them to be constructed and operated in a specific orientation. Furthermore, some of the aforementioned terms may be used to indicate other meanings besides orientation or positional relationship; for example, the term "upper" may in some cases indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in the embodiments of this disclosure according to the specific circumstances.

[0026] Furthermore, the terms "set up," "connect," and "fix" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this disclosure according to the specific circumstances.

[0027] Unless otherwise stated, the term "multiple" means two or more.

[0028] In this embodiment of the disclosure, the character " / " indicates that the objects before and after it are in an "or" relationship. For example, A / B means: A or B.

[0029] The term "and / or" describes an association between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or A and B.

[0030] It should be noted that, unless otherwise specified, the embodiments and features described in the present disclosure can be combined with each other.

[0031] Active suspension technologies include hydraulic active dampers, linear motor active dampers, and ball screw active dampers. Hydraulic active dampers are complex and costly, and typically use solenoid valve dampers, resulting in poor ride comfort. Linear motor active dampers are bulky, have low active force, and generally do not have dampers, also leading to poor ride comfort. Ball screw active dampers are bulky, cannot be matched with air springs, and also use solenoid valve dampers, resulting in poor ride comfort.

[0032] Therefore, in combination Figures 1 to 7As shown, this disclosure provides an active suspension system, including a support assembly 10, a drive assembly 20, and a shock absorber assembly 30. The support assembly 10 is connected to the vehicle body; the drive assembly 20 includes a hollow shaft motor 21 and a sleeve 22, the hollow shaft motor 21 being mounted on the support assembly 10 and having a hollow shaft hole 211; wherein the drive end of the hollow shaft motor 21 is drivably connected to the sleeve 22, and the hollow space of the sleeve 22 communicates with the hollow shaft hole 211; the shock absorber assembly 30 is connected to the vehicle wheel assembly, and includes a cylinder 31 and a piston rod 33 mounted on the cylinder 31; wherein the cylinder 31 and the sleeve 22 form a ball screw mechanism, and the piston rod 33 passes through the hollow shaft hole 211 and is fixed to the support assembly 10, and the cylinder 31 can reciprocate within the sleeve 22 along the direction of the piston rod 33.

[0033] The active suspension provided in this embodiment uses a hollow shaft motor 21 installed in the drive assembly 20. The drive end of the hollow shaft motor 21 is connected to the sleeve 22, and the cylinder 31 of the shock absorber assembly 30 and the sleeve 22 form a ball screw mechanism. Thus, by rotating the sleeve 22 through the hollow shaft motor 21, the sleeve 22 drives the cylinder 31 of the shock absorber assembly 30 to rotate. Since the hollow shaft motor 21 is fixed to the support assembly 10, the cylinder 31 can reciprocate up and down on the sleeve 22. Simultaneously, the piston rod 33 of the shock absorber assembly 30 passes through the hollow shaft hole 211 of the hollow shaft motor 21, effectively shortening the vertical distance and thus greatly reducing the installation space while ensuring high active force output.

[0034] Based on this, the piston rod 33 is fixed to the support assembly 10, and the support assembly 10 is used to connect to the vehicle body. In this way, the damping force of the shock absorber assembly 30 can be directly transmitted to the support assembly 10, and high-frequency buffering is performed through the support assembly 10, thereby improving the comfort of the vehicle.

[0035] In this embodiment, the support assembly 10 is used to connect to the vehicle body, and the hollow shaft motor 21 of the drive assembly 20 is fixedly installed on the support assembly 10. A hollow shaft hole 211 with a through structure is provided in the middle of the hollow shaft motor 21. At the same time, a sleeve 22 is connected to the drive end of the hollow shaft motor 21. The sleeve 22 is also provided with a central shaft hole, and the central shaft hole communicates with the hollow shaft hole 211. In this way, when the cylinder 31 of the shock absorber assembly 30 and the sleeve 22 form a ball screw mechanism, the piston rod 33 of the shock absorber assembly 30 can pass through the central shaft hole and the hollow shaft hole 211 to connect with the support assembly 10.

[0036] In this embodiment, the cylinder 31 of the piston rod 33 can move vertically along the piston rod 33. Since the sleeve 22 is connected to the drive end of the hollow shaft motor 21, and the cylinder 31 and sleeve 22 constitute a ball screw mechanism—that is, the cylinder 31 is equivalent to the lead screw in the ball screw mechanism, and the sleeve 22 is equivalent to the ball screw nut—when the sleeve 22 rotates actively, it can drive the cylinder 31 to move along the piston rod 33. Alternatively, when the sleeve 22 does not rotate actively, the cylinder 31 is subjected to force, which can drive the sleeve 22 to rotate, causing the cylinder 31 to move along the piston rod 33. Therefore, through the cooperation between the sleeve 22 and the cylinder 31, the suspension height can be effectively adjusted.

[0037] In this embodiment, the hollow shaft motor 21 effectively reduces the size of the suspension, making it lighter, while ensuring the main driving force. On this basis, combined with the cooperation of the cylinder 31 and the sleeve 22, the output force can reach about 10,000N, while also ensuring the response adjustment speed.

[0038] Combination Figure 2 and Figure 6 As shown, in some embodiments, the outer surface of the cylinder 31 has a lead screw thread section 311 and a non-threaded section 312; wherein, the lead screw thread section 311 and the sleeve 22 constitute a ball screw mechanism, and the length of the lead screw thread section 311 is greater than the length of the sleeve 22.

[0039] In this embodiment of the disclosure, a hollow shaft motor 21 is provided with a hollow shaft hole 211 in the middle, and a driving end is provided at one end of the hollow shaft hole 211 of the hollow shaft motor 21. The driving end is drivenly connected to the sleeve 22, so that the sleeve 22 can rotate, and the central shaft hole of the sleeve 22 coincides with the axis of the hollow shaft hole 211.

[0040] In this embodiment of the present disclosure, the outer surface of the cylinder 31 has a lead screw thread section 311 and a non-threaded section 312, wherein the lead screw thread section 311 is connected to the sleeve 22; thus, the lead screw thread section 311 and the sleeve 22 constitute a ball screw mechanism.

[0041] In this embodiment, to precisely control the adjustment height of the active suspension, i.e., the actual distance the cylinder 31 moves within the sleeve 22, the length of the lead screw thread section 311 on the outer surface of the cylinder 31 is greater than the length of the sleeve 22. This ensures that the adjustment height is controlled by the length of the sleeve 22.

[0042] In some embodiments, the sleeve engages with the threaded section of the lead screw via balls to form a ball screw mechanism.

[0043] In some alternative embodiments, an external thread is provided on the screw thread section 311 of the cylinder 31, and an internal thread is provided on the inner surface of the sleeve 22, wherein the internal thread and the external thread are connected by a plurality of balls, thereby forming a ball screw mechanism.

[0044] In some alternative embodiments, an external thread is provided on the screw thread section 311 of the cylinder 31, and a plurality of rolling balls are provided on the inner surface of the sleeve 22, wherein the external thread of the screw thread section 311 is in rolling connection with the balls, thereby forming a ball screw mechanism.

[0045] Combination Figure 2 and Figure 6 As shown, in some embodiments, the support assembly 10 includes an inner support platform 11, an outer support cylinder 12, and a buffer ring 13. The hollow shaft motor 21 of the drive assembly 20 is disposed on the inner support platform 11, and the piston rod 33 passes through the hollow shaft hole 211 and is fixed to the inner support platform 11. The outer support cylinder 12 is sleeved on the inner support platform 11. The buffer ring 13 is disposed between the inner support platform 11 and the outer support cylinder 12.

[0046] In this embodiment, the hollow shaft motor 21 is fixedly mounted below the inner support platform 11, and the piston rod 33 of the drive assembly 20 passes through the hollow shaft hole 211 and is fixed to the inner support platform 11. This allows the damping force of the drive assembly 20 to be directly transmitted to the inner support platform 11 of the support assembly 10, utilizing the inner support platform 11 for high-frequency buffering, thereby reducing the transmission of high-frequency vibrations to the vehicle body. Here, the inner support platform 11 can be a top-mounted structure made of rubber.

[0047] In this embodiment, the support assembly 10 further includes an outer support cylinder 12, which is a metal frame. An inner support platform 11 is fixedly disposed inside the outer support cylinder 12. In order to further reduce vibration, a buffer ring 13 is provided between the inner support platform 11 and the outer support cylinder 12. In this way, the transmission of high-frequency vibration is further reduced by the buffer ring 13, thereby further ensuring comfort.

[0048] Combination Figures 1 to 3 As shown, in some embodiments, the outer side of the inner support platform 11 is provided with a snap-fit ​​structure 111, the inner side of the outer support cylinder 12 is provided with a snap-fit ​​structure 121, and the buffer ring 13 is disposed between the snap-fit ​​structure 111 and the snap-fit ​​structure 121; wherein, the inner support platform 11 is also provided with a reserved hole 112.

[0049] In this embodiment, the outer side of the inner support platform 11 is provided with a snap-fit ​​structure 111, and the inner side of the outer support cylinder 12 is provided with a snap-fit ​​engagement structure 121. The snap-fit ​​structure 111 can engage with the snap-fit ​​engagement structure 121, thereby achieving positioning of the two. Here, one of the snap-fit ​​structure 111 and the snap-fit ​​engagement structure 121 is an annular snap protrusion, and the other of the snap-fit ​​structure 111 and the snap-fit ​​engagement structure 121 is an annular snap groove. In this way, engagement is achieved through the annular snap protrusion and the annular snap groove.

[0050] The buffer ring 13 is positioned between the inner support platform 11 and the outer support cylinder 12. The shape of the buffer ring 13 is adapted to the annular protrusion or annular groove, thus isolating the two. Specifically, the buffer ring 13 is positioned between the annular protrusion and the annular groove 121.

[0051] In this embodiment, since the hollow shaft motor 21 is located below the inner support platform 11, a reserved hole 112 is also provided on the inner support platform 11, through which the connecting wire harness of the hollow shaft motor 21 can pass.

[0052] Combination Figure 4 and Figure 6 As shown, in some embodiments, the active suspension further includes: a housing assembly 40, the first end of which is sealed to the outer support cylinder 12 of the support assembly 10, and the second end of which is sealed to the non-threaded section 312 of the cylinder 31, so as to form a closed space between the support assembly 10 and the non-threaded section 312 of the cylinder 31.

[0053] In this embodiment, the first end of the housing assembly 40 is sealed to the outer support cylinder 12 of the support assembly 10, and the second end of the housing assembly 40 is sealed to the non-threaded section 312 of the cylinder 31. Thus, the housing assembly 40, the support assembly 10, and the shock absorber assembly 30 form a sealed space. This not only ensures the airtightness of the active suspension but also provides dust protection, thereby extending its service life.

[0054] Since a reserved hole 112 is provided on the inner support platform 11, the airtightness of the active suspension can also be ensured through the reserved hole 112.

[0055] Combination Figure 4 As shown, in some embodiments, the housing assembly 40 includes a bladder 41, a first sleeve 42, and a second sleeve 43. The bladder 41 has a first end sealed to the outer support sleeve 12 of the support assembly 10; the first sleeve 42 is fitted onto the non-threaded section 312 of the cylinder 31, and the second end of the bladder 41 is sealed to the first sleeve 42; the second sleeve 43 is fitted onto the outer surface of the bladder 41.

[0056] In this embodiment, the bladder 41 is made of elastic rubber material. The first end of the bladder 41 is sealed to the outer support cylinder 12 of the support assembly 10. Specifically, a first buckle 44 is provided on the outer surface of the first end of the bladder 41, and the first end of the bladder 41 is pressed against the outer surface of the outer support cylinder 12 by the first buckle 44.

[0057] In this embodiment, a first protective sleeve 42 is provided on the non-threaded section 312 of the cylinder 31. The first protective sleeve 42 is connected to the cylinder 31 via a sealing ring, and the second end of the bladder 41 is sealed to the outer support cylinder 12 of the support assembly 10. Specifically, a third retaining ring 46 is provided on the outer surface of the second end of the bladder 41, which presses the second end of the bladder 41 against the outer surface of the outer support cylinder 12. In this way, the outer support cylinder 12, the bladder 41, the first protective sleeve 42, and the cylinder 31 form a closed space.

[0058] In this embodiment, a second protective sleeve 43 is provided on the outside of the bladder skin 41. The second protective sleeve 43 can protect the bladder skin 41 and prevent damage to the bladder skin 41. A second buckle 45 is provided at the middle position of the inner surface of the bladder skin 41. The bladder skin 41 is pressed by the supporting force of the second buckle 45, so that the bladder skin 41 is connected to the second protective sleeve 43.

[0059] Combination Figure 5 and Figure 6 As shown, in some embodiments, the shock absorber assembly 30 further includes a piston 32 movably disposed within the cylinder 31, the piston 32 being connected to the piston rod 33.

[0060] In this embodiment of the present disclosure, the shock absorber assembly 30 further includes a piston 32 disposed in the cylinder 31, the piston 32 being fixedly connected to the piston rod 33, and since the piston rod 33 is fixed to the inner support platform 11 of the support assembly 10, the cylinder 31 of the shock absorber assembly 30 can move along the direction of the piston 32 and the piston rod 33.

[0061] Combination Figure 5 and Figure 6 As shown, in some embodiments, the damper assembly 30 further includes a guide 34 and a floating piston 35. The guide 34 is disposed within the cylinder 31; the floating piston 35 is disposed within the cylinder 31; wherein the piston 32 is disposed between the guide 34 and the floating piston 35, and the piston rod 33 passes through the guide.

[0062] In this embodiment, the damper assembly 30 is a magnetorheological damper; wherein, the magnetorheological damper has a large adjustable range of low-speed damping force, which will further remove high-frequency vibration, and combined with the output speed of the hollow shaft motor 11, the response frequency of both is above 100Hz.

[0063] In this embodiment, a magnetorheological fluid is disposed inside the cylinder 31. This magnetorheological fluid consists of fine, soft magnetic particles dispersed in a carrier liquid with low magnetic permeability, forming a suspended liquid whose shear yield strength can change with an applied magnetic field, exhibiting controllable rheological properties. Under the influence of a magnetic field, the magnetorheological fluid can undergo a reversible change from a Newtonian fluid to a semi-solid state within milliseconds. After the excitation coil is de-energized and the magnetic field is removed, it can return to a flowing, low-damping liquid state.

[0064] In this embodiment, an electromagnetic coil and a damping channel are provided inside the piston 32, wherein the power supply line of the piston 32 extends through the piston rod 33. Here, when the piston 32 is energized, the electromagnetic coil generates a magnetic field, causing a change in the viscosity of the magnetorheological fluid, thereby adjusting the damping force in real time.

[0065] In this embodiment, the guide 34 guides the linear movement of the piston rod 33, and the floating piston 35 compensates for volume changes and temperature effects. The guide 34 and the floating piston 35 together define the working chamber of the magnetorheological fluid. The floating piston 35 moves with the piston 32, maintaining pressure balance within the cylinder 31, thereby ensuring the stability of the damping force control and making its movement smoother.

[0066] In this embodiment of the disclosure, the shock absorber assembly 30 further includes a bushing 36 disposed below the cylinder 31 for connection to the vehicle's wheel assembly.

[0067] This disclosure also discloses a vehicle, including: a body; an active suspension as described in the foregoing embodiments, wherein a support assembly 10 of the active suspension is connected to the body; and a wheel assembly connected to a shock absorber assembly 30 of the active suspension.

[0068] In this embodiment, the vehicle includes the active suspension described above. Referring to the above embodiments, it at least has the beneficial effects brought about by the technical solutions of the above embodiments, which will not be repeated here.

[0069] The foregoing description and accompanying drawings fully illustrate embodiments of the present disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The embodiments represent only possible variations. Individual components and functions are optional unless explicitly required, and the order of operation may vary. Parts and features of some embodiments may be included or substituted for parts and features of other embodiments. Embodiments of the present disclosure are not limited to the structures described above and shown in the accompanying drawings, and various modifications and changes may be made without departing from its scope. The scope of the present disclosure is limited only by the appended claims.

Claims

1. An active suspension, characterized in that, include: Support component (10) for connection to the vehicle body; The drive assembly (20) includes a hollow shaft motor (21) and a sleeve (22). The hollow shaft motor (21) is mounted on the support assembly (10) and has a hollow shaft hole (211). The drive end of the hollow shaft motor (21) is drivenly connected to the sleeve (22), and the hollow space of the sleeve (22) is connected to the hollow shaft hole (211). A shock absorber assembly (30) is used to connect to a wheel assembly of a vehicle. The shock absorber assembly (30) includes a cylinder (31) and a piston rod (33) disposed on the cylinder (31). The cylinder (31) and the sleeve (22) form a ball screw mechanism, and the piston rod (33) passes through the hollow shaft hole (211) and is fixed to the support assembly (10). The cylinder (31) can reciprocate within the sleeve (22) along the direction of the piston rod (33).

2. The active suspension according to claim 1, characterized in that, The outer surface of the cylinder (31) has a screw thread section (311) and a non-threaded section (312); wherein the screw thread section (311) and the sleeve (22) constitute a ball screw mechanism, and the length of the screw thread section (311) is greater than the length of the sleeve (22).

3. The active suspension according to claim 2, characterized in that, The sleeve (22) engages with the threaded section (311) of the lead screw via balls to form a ball screw mechanism.

4. The active suspension according to claim 2, characterized in that, The support component (10) includes: The hollow shaft motor (21) of the drive assembly (20) is located on the inner support platform (11), and the piston rod (33) passes through the hollow shaft hole (211) and is fixed on the inner support platform (11). The outer support cylinder (12) is sleeved on the inner support platform (11). A buffer ring (13) is disposed between the inner support platform (11) and the outer support cylinder (12).

5. The active suspension according to claim 4, characterized in that, The outer side of the inner support platform (11) is provided with a snap-fit ​​structure (111), the inner side of the outer support cylinder (12) is provided with a snap-fit ​​mating structure (121), and the buffer ring (13) is disposed between the snap-fit ​​structure (111) and the snap-fit ​​mating structure (121); a reserved hole (112) is also provided on the inner support platform (11).

6. The active suspension according to claim 4, characterized in that, Also includes: The housing assembly (40) has a first end sealed to the outer support cylinder (12) of the support assembly (10) and a second end sealed to the non-threaded section (312) of the cylinder (31) to form a closed space between the support assembly (10) and the non-threaded section (312) of the cylinder (31).

7. The active suspension according to claim 6, characterized in that, The housing assembly (40) includes: The first end of the bladder skin (41) is sealed to the outer support cylinder (12) of the support assembly (10); The first protective sleeve (42) is sleeved on the non-threaded section (312) of the cylinder (31), and the second end of the bladder (41) is sealed to the first protective sleeve (42); The second sleeve (43) is fitted onto the outer surface of the bladder skin (41).

8. The active suspension according to any one of claims 1 to 7, characterized in that, The damper assembly (30) also includes: A piston (32) is movably disposed inside the cylinder (31), and the piston (32) is connected to the piston rod (33).

9. The active suspension according to claim 8, characterized in that, The damper assembly (30) also includes: A guide (34) is disposed inside the cylinder (31); A floating piston (35) is disposed inside the cylinder (31); The piston (32) is disposed between the guide (34) and the floating piston (35), and the piston rod (33) passes through the guide.

10. A vehicle, characterized in that, include: Body; The active suspension as described in any one of claims 1 to 9, wherein the support assembly (10) of the active suspension is connected to the vehicle body; Wheel assembly, connected to the shock absorber assembly (30) of the active suspension.

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