Lifting device and vehicle

Abstract

A lifting device (10) and a vehicle. The lifting device (10) comprises a driving assembly (100), an elastic member (200), a transmission assembly (300) and a brake assembly (400), wherein the transmission assembly (300) is connected to the driving assembly (100) and to the elastic member (200); the driving assembly (100) is configured to drive the transmission assembly (300) to move in a first direction, so that the transmission assembly (300) drives the elastic member (200) to move in the first direction; the brake assembly (400) comprises a first magnetic member (410) and a second magnetic member (420), and the first magnetic member (410) is connected to the driving assembly (100); the brake assembly (400) has a power-on state and a power-off state; when the brake assembly (400) is in the power-on state, a gap is formed between the first magnetic member (410) and the second magnetic member (420), so as to allow the driving assembly (100) to drive the transmission assembly (300) to move; and when the brake assembly (400) is in the power-off state, the first magnetic member (410) is attracted to the second magnetic member (420), so as to prevent the driving assembly (100) from driving the transmission assembly (300) to move.

Description

Lifting device and vehicle CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] This application claims priority to Chinese patent application No. 202410026077.X filed on January 8, 2024, the entire text of which is incorporated herein by reference. Technical Field

[0002] The present application relates to, but is not limited to, the technical field of vehicle accessories, and in particular to a lifting device and a vehicle. Background Art

[0003] As user needs diversify, vehicle usage scenarios are also increasing. The vehicle's ability to navigate difficult obstacles or steep slopes in a normal driving position has become an important indicator of vehicle performance. Summary of the Invention

[0004] The following is a summary of the subject matter described in detail herein. This summary is not intended to limit the scope of the claims.

[0005] The present application provides a lifting device and a vehicle, which can quickly lock the vehicle body height.

[0006] One aspect of the present application provides a lifting device, comprising: a driving assembly; an elastic member; a transmission assembly connected to the driving assembly and the elastic member, the driving assembly being used to drive the transmission assembly to move in a first direction, so that the transmission assembly drives the elastic member to move in the first direction; the transmission assembly is provided with a receiving cavity extending along the first direction, for accommodating a vibration damping device; a braking assembly, comprising a first magnetic member and a second magnetic member, the first magnetic member being connected to the driving assembly; the braking assembly has a power-on state and a power-off state, when the braking assembly is in the power-on state, there is a gap between the first magnetic member and the second magnetic member to allow the driving assembly to drive the transmission assembly to move; when the braking assembly is in the power-off state, the first magnetic member is adsorbed on the second magnetic member to prevent the driving assembly from driving the transmission assembly to move.

[0007] The lifting device, drive assembly and transmission assembly of the present application can provide lifting force, realize rapid lifting of the vehicle, improve the vehicle's passability and off-road capability, and can automatically lock to maintain the vehicle body height when the vehicle loses power, with high safety and reliability.

[0008] Optionally, the first magnetic part includes a first permanent magnet, a reset part and a first friction plate, the second magnetic part includes a second permanent magnet, a coil and a second friction plate, the first permanent magnet and the second permanent magnet have an attractive magnetic force, and the reset part is used to provide the first permanent magnet with an elastic force close to the second permanent magnet; when the brake assembly is in the power-on state, the coil is energized to overcome the attractive magnetic force between the first permanent magnet and the second permanent magnet, so that the first magnetic part moves away from the second magnetic part, so that there is a gap between the first magnetic part and the second magnetic part, and the reset part is deformed; when the brake assembly is in the power-off state, the coil is de-energized, the reset part rebounds, and the attractive magnetic force between the first permanent magnet and the second permanent magnet causes the first magnetic part to move toward the direction of the second magnetic part, so that the first friction plate and the second friction plate are pre-pressed.

[0009] Optionally, the first direction includes a vertical direction, and the brake assembly is located below the drive assembly and the transmission assembly in the vertical direction.

[0010] Optionally, the drive assembly includes a first drive member and a second drive member, the second drive member is located inside the first drive member, and when the first drive member is energized, the magnetic field generated by the first drive member drives the second drive member to rotate around the central axis of the second drive member; the first drive member and the second drive member are annular, the transmission assembly is located inside the second drive member, and the transmission assembly is connected to the second drive member, and the transmission assembly is used to convert the rotational motion of the second drive member into linear motion along the first direction.

[0011] Optionally, the transmission assembly includes a first transmission member, a second transmission member and a third transmission member, the first transmission member is connected to the second driving member, and the second driving member is used to drive the first transmission member to rotate; the second transmission member is located in the first transmission member, and the second transmission member is a hollow cylindrical member that passes through in the first direction to define the accommodating cavity; the first transmission member is provided with an internal thread, and the second transmission member is provided with an external thread corresponding to the internal thread of the first transmission member, and there are multiple third transmission members, and multiple third transmission members are engaged with the first transmission member and the second transmission member to convert the rotational motion of the first transmission member into the linear motion of the second transmission member along the first direction.

[0012] Optionally, the lifting device also includes a support member for supporting the elastic member, the support member is connected to the transmission assembly, and the support member is farther away from the braking assembly relative to the transmission assembly; the support member can move along the first direction under the drive of the transmission assembly to drive the elastic member to move along the first direction.

[0013] Optionally, the lifting device further includes an encoder provided on the transmission assembly for monitoring the status of the drive assembly and the transmission assembly; and / or the lifting device further includes a temperature sensor for monitoring the temperature of the drive assembly and the transmission assembly.

[0014] Optionally, the lifting device also includes an outer shell, which defines an accommodating cavity, and the drive assembly, the transmission assembly and the brake assembly are located in the accommodating cavity; the outer shell includes a first wall and a second wall opposite to each other in the first direction, and the outer shell is provided with an opening portion passing through the first wall and the second wall for accommodating the vibration damping device.

[0015] Optionally, the lifting device further includes a limiting assembly, the limiting assembly including a first bearing and a second bearing, the first bearing and the second bearing are both connected to the first transmission member, and the first bearing and the second bearing are spaced apart along the first direction.

[0016] Optionally, the transmission assembly is a planetary roller screw pair, the first transmission member is a screw nut, the second transmission member is a screw, and the third transmission member is a roller.

[0017] Optionally, the support member includes a buffer portion, which is provided at the abutment portion between the elastic member and the support member and is configured to protect the support member and the elastic member.

[0018] Optionally, the lifting device further includes: an oil seal, located between the outer shell and the vibration damping device, and arranged around the vibration damping device.

[0019] Optionally, the lifting device further includes: a sliding sleeve, located between the outer shell and the vibration damping device, and arranged around the vibration damping device.

[0020] Another aspect of the present application provides a vehicle, comprising: a vibration damping device; and the lifting device described in any one of the above items, wherein the vibration damping device is assembled in the receiving cavity.

[0021] Optionally, the vibration damping device, the driving assembly, the transmission assembly and the braking assembly are coaxially assembled.

[0022] Still other aspects will become apparent upon reading and understanding the accompanying drawings and detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0024] FIG1 is a schematic structural diagram of a vehicle according to an embodiment of the present application.

[0025] FIG2 is a schematic structural diagram of a lifting device according to an embodiment of the present application.

[0026] FIG3A is a schematic cross-sectional view of the lifting device shown in FIG2 .

[0027] FIG3B is an enlarged schematic diagram of a brake assembly according to an embodiment of the present application.

[0028] FIG4 is a partial enlarged schematic diagram of the lifting device shown in FIG2 . DETAILED DESCRIPTION

[0029] Exemplary embodiments will be described in detail herein, with examples illustrated in the accompanying drawings. In the following description, when referring to the drawings, identical numerals in different figures represent identical or similar elements, unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.

[0030] The terminology used in this application is for the purpose of describing specific embodiments only and is not intended to limit this application. Unless otherwise defined, technical or scientific terms used in this application should have the same ordinary meaning as those of ordinary skill in the art to which this application belongs. The terms "first," "second," and similar terms used in this specification and claims do not denote any order, quantity, or importance, but are simply used to distinguish different components. Similarly, terms such as "a" or "an" do not denote a limitation of quantity, but rather denote the presence of at least one. "Multiple" or "several" means at least two. Unless otherwise indicated, terms such as "front," "rear," "lower," and / or "top," "bottom," and "upper" are used for convenience only and are not intended to limit to a single position or spatial orientation. Terms such as "include" or "comprising" mean that the elements or objects listed before "include" or "comprising" include the elements or objects listed after "include" or "comprising" and their equivalents, and do not exclude other elements or objects. Terms such as "connected" or "connected" are not limited to physical or mechanical connections and can include electrical connections, whether direct or indirect.

[0031] As used in this specification and the appended claims, the singular forms "a," "an," "said," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and / or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

[0032] At present, the vehicle height is mainly adjusted by changing the volume of the air spring, the position of the spring tray of the coilover shock absorber, and the hydraulic shock absorber. When the vehicle loses power, the vehicle height will change suddenly, which has low reliability and affects the user experience.

[0033] In view of this, the present application provides a lifting device and a vehicle. The lifting device provided in the present application includes a driving assembly, an elastic member, a transmission assembly and a braking assembly. The transmission assembly is connected to the driving assembly and to the elastic member. The driving assembly is used to drive the transmission assembly to move in a first direction, so that the transmission assembly drives the elastic member to move in the first direction; the transmission assembly is provided with a receiving cavity extending along the first direction for accommodating a vibration damping device. The braking assembly includes a first magnetic member and a second magnetic member, and the first magnetic member is connected to the driving assembly; the working state of the braking assembly includes a power-on state and a power-off state. When the braking assembly is in the power-on state, there is a gap between the first magnetic member and the second magnetic member to allow the driving assembly to drive the transmission assembly to move; when the braking assembly is in the power-off state, the first magnetic member is adsorbed on the second magnetic member to prevent the driving assembly from driving the transmission assembly to move.

[0034] The lifting device, drive assembly and transmission assembly provided in this application can provide lifting force, realize rapid lifting of the vehicle, improve the vehicle's passability and off-road capability, and can automatically lock to maintain the vehicle body height when the vehicle loses power, with high safety and reliability.

[0035] The vehicle provided in the present application includes a vibration damping device and a lifting device. The vibration damping device is assembled in a receiving cavity of the lifting device.

[0036] The lifting device and vehicle of the present application are described in detail below with reference to the accompanying drawings. In the absence of conflict, the features of the following embodiments and implementations can be combined with each other.

[0037] FIG1 shows a schematic structural diagram of a vehicle 1 according to an embodiment of the present application. The vehicle 1 according to the embodiment of the present application mainly includes new energy vehicles, which may further include pure electric vehicles, hybrid vehicles, plug-in hybrid vehicles, and other vehicles that use an on-board power battery as the main power source or one of the power sources. The vehicle 1 according to the embodiment of the present application includes a vibration damping device 20 and a lifting device 10. The vibration damping device 20 is a device for reducing vibrations and impacts caused by uneven roads, bumps, and the vehicle's own vibrations when the vehicle is traveling. It is located in the vehicle suspension system and can improve ride comfort and vehicle handling stability. In this embodiment, the vibration damping device 20 is assembled in the receiving cavity 310 of the lifting device 10, that is, the lifting device 10 is assembled on the outer cylinder of the vibration damping device 20 and is fixedly connected by a welding bracket on the outer cylinder of the vibration damping device 20, with a high load-bearing capacity. In the related art, the lifting device is assembled on the piston rod of the vibration damping device, which requires a portion of the length of the outer cylinder of the vibration damping device, and the layout structure is limited. The lifting device 10 of the embodiment of the present application is assembled on the outer cylinder of the vibration reduction device 20, and its layout structure is not restricted by the vibration reduction device 20, and the assembly flexibility is higher.

[0038] As shown in FIG1 , the lower portion of the lifting device 10 can be connected to the lower control arm 40 , which is connected to the subframe 50 and the steering knuckle 60 . The upper portion of the lifting device 10 can be connected to the upper mounting bracket 70 , and the upper control arm 30 is provided around the lifting device 10 .

[0039] FIG2 is a schematic diagram of the structure of a lifting device 10 according to an embodiment of the present application. FIG3A is a schematic cross-sectional diagram of the lifting device 10 shown in FIG2 . The lifting device 10 according to the embodiment of the present application includes a driving assembly 100, an elastic member 200, a transmission assembly 300, and a brake assembly 400. The transmission assembly 300 is connected to the driving assembly 100 and to the elastic member 200. The driving assembly 100 is used to drive the transmission assembly 300 to move in a first direction, so that the transmission assembly 300 drives the elastic member 200 to move in the first direction; the transmission assembly 300 is provided with a receiving chamber 310 extending along the first direction for accommodating the vibration damping device 20. The brake assembly 400 includes a first magnetic component 410 and a second magnetic component 420, and the first magnetic component 410 is connected to the drive assembly 100; the working states of the brake assembly 400 include a power-on state and a power-off state. When the brake assembly 400 is in the power-on state, there is a gap between the first magnetic component 410 and the second magnetic component 420 to allow the drive assembly 100 to drive the transmission assembly 300 to move; when the brake assembly 400 is in the power-off state, the first magnetic component 410 is adsorbed on the second magnetic component 420 to prevent the drive assembly 100 from driving the transmission assembly 300 to move.

[0040] The lifting device 10, the drive assembly 100 and the transmission assembly 300 of the embodiment of the present application can provide lifting force, realize rapid lifting of the vehicle, improve the vehicle's passability and off-road capability, and can automatically lock to maintain the vehicle body height when the vehicle loses power, with high safety and reliability.

[0041] In the related art, the vehicle lifting methods mainly include the following three: adjusting the vehicle height by changing the volume of the air spring, adjusting the vehicle height by changing the position of the spring tray of the coilover shock absorber, and adjusting the vehicle height by the hydraulic shock absorber. Among them, the air spring cannot achieve stepless adjustment of the stroke, has slow response, and low reliability, and cannot meet the harsh working conditions of the vehicle under deep off-road driving; the height adjustment operation of the coilover shock absorber is inconvenient; the hydraulic shock absorber system is complex, costly, and has low reliability, and is prone to oil leakage and other problems. In addition, the above methods cannot achieve dynamic control of the vehicle tires, and have limited contributions to vehicle handling and comfort. They are also unable to improve the vehicle's ability to suppress pitch and roll, and have relatively simple functions. Compared with the above-mentioned vehicle lifting methods, the lifting device 10 of this embodiment has advantages in lifting speed, ease of operation, reliability, and ease of machining.

[0042] In some embodiments, the vibration reduction device 20, the driving assembly 100, the transmission assembly 300, and the brake assembly 400 are coaxially assembled. YY shown in FIG1 and FIG3A is the axis of the lifting device 10 and the vibration reduction device 20.

[0043] It should be noted that, as shown in Figures 1 and 3A, the first direction is the direction of the axis YY of the lifting device 10 and the vibration reduction device 20 of the present application. The elastic member 200 may include a coil spring.

[0044] In some embodiments, the power source of the lifting device 10 is a DC voltage, which has the characteristics of high response frequency and convenient control.

[0045] In some embodiments, the first magnetic member 410 includes a first permanent magnet, a reset member, and a first friction plate. The second magnetic member 420 includes a second permanent magnet, a coil 430, and a second friction plate. The first and second permanent magnets exert an attractive magnetic force, and the reset member provides an elastic force to pull the first permanent magnet toward the second permanent magnet. When the brake assembly 400 is energized, the coil 430 is energized to overcome the attractive magnetic force between the first and second permanent magnets, causing the first magnetic member 410 to move away from the second magnetic member 420. This creates a gap between the first and second magnetic members 410, 420, and deforms the reset member. When the brake assembly 400 is de-energized, the coil 430 is de-energized, causing the reset member to rebound. The attractive magnetic force between the first and second permanent magnets causes the first magnetic member 410 to move toward the second magnetic member 420, thereby pre-compressing the first and second friction plates. In related art, the lifting device cannot accurately lock the lifting height after lifting. In this embodiment, the lifting device 10 can achieve precise locking at any raised position of the vehicle, and can achieve automatic locking when the power is cut off, which is safe and reliable and has high locking accuracy.

[0046] In this embodiment, as shown in Figure 3B, the brake assembly 400 may be a permanent magnet brake. The first magnetic component 410 is the brake rotor assembly, and the second magnetic component 420 is the brake stator assembly. The brake rotor assembly includes a fixed plate 411, a first permanent magnet 412, and a reset member 413. The fixed plate 411 is fixedly connected to the second driving member 120. The first permanent magnet 412 is movably connected to the fixed plate 411 via multiple guide posts. The surface of the first permanent magnet 412 facing the brake stator assembly is coated with a friction coating, allowing the first permanent magnet 412 to also function as a first friction plate. The reset member 413 is a coil spring. In other embodiments, the reset member may also be a leaf spring, which is not limited in this application. The brake stator assembly includes a second permanent magnet 421 and a coil 430. The surface of the second permanent magnet 421 facing the brake rotor assembly is coated with a friction coating, allowing the second permanent magnet 421 to also function as a second friction plate.

[0047] Specifically, when coil 430 is energized, a magnetic force is generated that overcomes the magnetic force between first permanent magnet 412 and second permanent magnet 421, pushing the brake rotor assembly upward. This creates a gap s between the brake rotor assembly and the brake stator assembly, and the coil spring deforms, unlocking the brake assembly and allowing the second drive member 120 to rotate, thereby driving the transmission assembly 300 in the first direction under the interaction of electromagnetic forces. When coil 430 is de-energized, only the attractive magnetic force between first permanent magnet 412 and second permanent magnet 421 remains, causing the coil spring to rebound, eliminating gap s and achieving contact, pre-compression, and locking of the first and second friction plates, thereby preventing the second drive member 120 from rotating. The brake assembly 400 in this embodiment can lock the height position of the transmission assembly 300 in real time.

[0048] It should be noted that the second permanent magnet 421 may also be replaced by a non-magnetic shell. In this case, after the coil 430 is powered off, the gap s between the brake rotor assembly and the brake stator assembly is eliminated only by the rebound of the coil spring.

[0049] In some embodiments, the first direction includes a vertical direction, and the brake assembly 400 is located below the drive assembly 100 and the transmission assembly 300 in the vertical direction, thereby ensuring that the height of the vehicle does not drop due to gravity impact.

[0050] In some embodiments, the drive assembly 100 includes a first drive member 110 and a second drive member 120, and the second drive member 120 is located inside the first drive member 110. When the first drive member 110 is energized, the magnetic field generated by the first drive member 110 drives the second drive member 120 to rotate around the central axis of the second drive member 120. The first drive member 110 and the second drive member 120 are annular, and the transmission assembly 300 is located inside the second drive member 120, and the transmission assembly 300 is connected to the second drive member 120, and the transmission assembly 300 is used to convert the rotational motion of the second drive member 120 into linear motion along a first direction. In this embodiment, the drive assembly 100 includes a motor, the first drive member 110 is a stator, and the second drive member 120 is a rotor. The drive assembly 100 in this embodiment may also include a winding 130, which generates a rotating magnetic field after being energized, driving the rotor to rotate. Further, the above-mentioned motor may include a ring motor, and the motor may be a brushless DC motor with an operating voltage of 48V.

[0051] In some embodiments, the transmission assembly 300 includes a first transmission member 320, a second transmission member 330, and a third transmission member 340. The first transmission member 320 is connected to the second drive member 120, which is used to drive the first transmission member 320 to rotate. The second transmission member 330 is located within the first transmission member 320 and is in the shape of a hollow cylinder extending in the first direction to define the receiving chamber 310. The first transmission member 320 has an internal thread, and the second transmission member 330 has an external thread corresponding to the internal thread of the first transmission member 320. There are multiple third transmission members 340, and the multiple third transmission members 340 engage with the first transmission member 320 and the second transmission member 330 to convert the rotational motion of the first transmission member 320 into linear motion of the second transmission member 330 along the first direction. In this embodiment, the transmission assembly 300 can be a planetary roller screw pair, with the first transmission member 320 being a screw nut, the second transmission member 330 being a screw, and the third transmission member 340 being a roller.

[0052] Specifically, the rotor in the motor can cooperate with the roller screw, and the motor generates torque. When the rotor rotates, it drives the nut to rotate. Because the inner surface of the nut, the surface of the roller, and the area where the screw and roller cooperate contain raceways, when the nut rotates driven by the rotor, the roller rotates in the opposite direction, indirectly causing the screw to perform axial linear motion. When the screw is rotated axially by the rotation of the motor rotor, the torque generated by the motor will be transmitted to the screw through the rotational motion. At this time, the linear torque generated by the screw pushes and compresses the elastic member 200 to perform axial linear motion in the first direction. The stiffness of the elastic member 200 is changed to change the vehicle body height, thereby optimizing ride comfort.

[0053] In the related art, the vehicle is lifted by the transmission cooperation between the screw and nut. However, the lifting device 10 of the embodiment of the present application uses a planetary roller screw pair for torque amplification and lifting, which has a large transmission ratio and a strong lifting force.

[0054] The lifting device 10 of the embodiment of the present application is safe and reliable in hardware and can meet the vehicle usage environment under different working conditions.

[0055] In some embodiments, the lifting device 10 further includes a limiting assembly comprising a first bearing 921 and a second bearing 922. The first bearing 921 and the second bearing 922 are both connected to the first transmission member 320 and are spaced apart along the first direction. The first bearing 921 and the second bearing 922 may comprise ball bearings capable of withstanding radial and axial forces and serving as a limiting mechanism for the drive assembly 100.

[0056] In some embodiments, the lifting device 10 further includes a support member 500 for supporting the elastic member 200. The support member 500 is connected to the transmission assembly 300 and is further away from the brake assembly 400 than the transmission assembly 300. The support member 500 can move in a first direction under the drive of the transmission assembly 300, thereby driving the elastic member 200 to move in the first direction. Furthermore, the support member 500 can include a buffer portion 510. The buffer portion 510 is provided at the abutting portion between the elastic member 200 and the support member 500, and can protect the support member 500 and the elastic member 200, thereby extending the service life of the support member 500 and the elastic member 200. The buffer portion 510 can be made of an elastic material, such as a rubber material.

[0057] In some embodiments, the lifting device 10 further includes an outer shell 910, which defines a housing chamber within which the drive assembly 100, transmission assembly 300, and brake assembly 400 are located. The outer shell 910 includes a first wall and a second wall that are opposite each other in a first direction. The outer shell 910 defines an opening that extends through the first wall and the second wall for receiving the vibration damping device 20. The lifting device 10 further includes a support plate 950 and an end cap 960. As shown in FIG. 3A , the support plate 950 can be bolted to the support member 500, and the end cap 960 can be bolted to the outer shell 910 to achieve improved sealing and waterproofing.

[0058] The lifting device 10 of the embodiment of the present application can be provided with oil lubrication between each moving part, such as the transmission component 300 and the drive component 100, which can increase the service life of the lifting device 10 and reduce the noise generated when the lifting device 10 is working to a certain extent.

[0059] On the basis of the above embodiment, the lifting device 10 may further include an oil seal 930. The oil seal 930 is a sealing device for preventing lubricant leakage. As shown in Figure 3A, in this embodiment, the oil seal 930 is located between the outer shell 910 and the vibration damping device 20, and is arranged around the outer cylinder of the vibration damping device 20 to prevent the lubricant from leaking from the gap between the vibration damping device 20 and the outer shell 910. The oil seal 930 can effectively prevent the leakage of lubricating oil or grease, and block external contaminants from entering the interior of the lifting device 10, ensuring the normal operation of the lifting device 10. Optionally, the oil seal 930 can be composed of a metal shell, a spring and a rubber sealing ring. The sealing ring is used to apply pressure to the vibration damping device 20 and fit tightly with it to form an effective sealing protective layer. The lifting device 10 of the embodiment of the present application has good sealing performance and the waterproof level can reach IP68 or above.

[0060] In some embodiments, the lifting device 10 may further include a sleeve 940. The sleeve 940 is a mechanical part used to reduce friction and wear. As shown in FIG3A , in this embodiment, the sleeve 940 is located between the outer shell 910 and the vibration damping device 20, and is arranged around the outer cylinder of the vibration damping device 20, playing a supporting, guiding and protective role, and can realize the screw rod limiting function, which can reduce friction and wear between parts, extend the service life of the lifting device 10, and ensure the normal operation of the lifting device 10. Optionally, the sleeve 940 can be made of a metal material, such as copper, aluminum, steel, etc.

[0061] In some embodiments, the lifting device 10 further includes an encoder 600 located within the transmission assembly 300 for monitoring the status of the drive assembly 100 and the transmission assembly 300. The encoder 600, which may include a circuit board and a magnetic ring, can record the rotation direction and number of revolutions of the drive assembly 100 rotor, as well as the working stroke position of the transmission assembly 300, in real time, providing feasibility for implementing functional control logic. The encoder 600 can be integrated within the lifting device 10 to achieve a high level of integration for the lifting device 10.

[0062] Figure 4 is a partially enlarged schematic diagram of the lifting device 10 shown in Figure 2. In some embodiments, the lifting device 10 further includes a temperature sensor 700 for monitoring the temperature of the drive assembly 100 and the transmission assembly 300. The temperature sensor 700 can be integrated within the lifting device 10, enabling convenient and safe real-time monitoring of the operating status of the drive assembly 100 (e.g., the motor). In summary, the lifting device 10 of the present embodiment has a high degree of assembly integration and is flexible and convenient to deploy.

[0063] As shown in FIG4 , the lifting device 10 of the embodiment of the present application may further include a connecting harness 800 , which may provide a power source for each component and communicate with an external controller to realize information interaction and facilitate control.

[0064] The lifting device 10 of the present embodiment primarily functions to lift the vehicle, increasing ground clearance, approach angle, departure angle, and breakover angle, enabling the vehicle to easily negotiate obstacles or steep slopes that would be difficult to navigate in a normal driving position, thus expanding the vehicle's usability. Furthermore, the lifting device 10 belongs to the category of fully active intelligent suspension and is a key component of advanced magic carpet suspension systems. The lifting device 10 of the present embodiment offers convenient adjustment, fast lifting speed, high efficiency, and stepless and continuous adjustment of the lifting height. Compared to conventional air springs, it offers faster adjustment speed, a wider adjustment range, and greater reliability, allowing the vehicle to easily handle challenging off-road conditions such as rocky roads, shell craters, and steep slopes. The lifting device 10 of the present embodiment dynamically controls each of the vehicle's four wheels, significantly enhancing vehicle comfort. It also significantly improves the vehicle's pitch angle during emergency braking and acceleration, as well as the roll angle during tight cornering, improving vehicle handling stability and providing a superior driving experience.

[0065] The lifting device 10 of the embodiment of the present application can exchange information with other sensors of the vehicle, realize real-time dynamic control of each wheel through the controller, have a high response frequency, can lift the vehicle quickly and conveniently, greatly improve the vehicle's controllability, comfort and safety, and can provide users with a driving experience as if driving on flat ground even in harsh working conditions.

[0066] The lifting device 10 in any of the above embodiments of the present application can be applied to a variety of vehicle functional scenarios, and the vehicle can include multiple operating modes corresponding to different functional scenarios. The lifting device 10 in the embodiment of the present application can be applied to the following multiple operating modes.

[0067] Specifically, the vehicle's operating modes can include a roll control mode. In roll control mode, the lift device 10 can replace the functions of conventional front and rear passive stabilizer bars and active stabilizer bars. Sensors on the vehicle can monitor the vehicle's roll status in real time and provide lateral force support. For example, when the vehicle enters a corner, the lift devices on the two inner wheels actively retract, and the support members 500 move downward by a stroke H1 within a specified time t1. The lift devices on the two outer wheels actively extend, and the support members 500 move upward by a stroke H2 within a specified time t2, to improve the vehicle's roll angle. After the wheels exit the corner, the inner and outer lift devices can quickly return to a balanced state. The vehicle's roll status can also be detected using vehicle speed signals and steering wheel angle sensor signals, or monitored using a vehicle roll sensor. These sensors should be positioned as close to the vehicle's center of mass as possible. A visual sensor can also be used to provide a cornering preview function, and the lift device's raised state can be maintained for a long period of time.

[0068] The vehicle's operating mode may include a pitch control mode. In the pitch control mode, when the vehicle is rapidly accelerating, the lifting devices on both sides of the front suspension can be instantaneously and actively contracted within a specified time according to the vehicle's acceleration value, and the support member 500 moves downward to lower the height of the front wheel arch. At the same time, the lifting devices on both sides of the rear suspension can be instantaneously and actively extended within a specified time to provide support force to the rear of the vehicle and reduce the tendency of the vehicle to tilt up. When the acceleration value reaches 0m / s 2 Or close to 0m / s 2 When the vehicle is in emergency braking or deceleration, the lifting devices on both sides of the front suspension will instantly extend within a specified time according to the vehicle's deceleration value, and the support member 500 will move upward to increase the height of the front wheel arch. At the same time, the lifting devices on both sides of the rear suspension will instantly contract within a specified time to provide support force to the front of the vehicle and reduce the vehicle's nodding tendency. When the deceleration value is 0m / s 2 Or when it approaches 0m / s2, the front and rear lifting devices return to the designed state. It should be noted that whether the vehicle pitch control needs to be controlled by both the front and rear axle motors or a single axle motor needs to be finally determined based on the software calibration results, and this application does not impose any restrictions.

[0069] The vehicle's operating mode may include a vehicle escape lift mode. In the vehicle escape lift mode, when the vehicle is in adverse working conditions such as mud, sand, snow, or steep slopes, the vehicle can control the lifting device 10 to automatically lift the chassis, increase ground clearance, increase the vehicle's approach angle, departure angle, and breakover angle, and improve the vehicle's off-road passability. After being connected to the environmental sensor, i.e., the camera road data acquisition system, the road condition can be identified in advance. When the vehicle is traveling on a pothole-prone road, the lifting device 10 of the embodiment of the present application can always keep any wheel that has jumped down in contact with the ground and provide driving force.

[0070] The vehicle's operating modes can include an entertainment mode. In entertainment mode, when the vehicle is stationary or traveling at low speed, the four wheels of the vehicle can be independently and rhythmically moved by controlling the lifting device 10 according to a preset entertainment mode, such as a light music entertainment mode or a rock and roll entertainment mode. The rhythmic movement of the vehicle can provide a sense of enjoyment to the driver or passengers. Of course, in this mode, the vehicle can also move to the rhythm of the music. It should be noted that to ensure safety, the entertainment mode can only be activated when there are passengers in the vehicle.

[0071] The vehicle's operating modes may include a welcome mode. In this mode, the vehicle can automatically activate the welcome mode, or the user can manually activate it. Specifically, in automatic mode, when the driver's door is opened, i.e., when the driver enters the vehicle from outside, the lifting device 10 is controlled to quickly raise the entire vehicle, making it easier for the driver to board. When the driver's door is closed, the entire vehicle can be quickly lowered to return to its designed position. When the driver's door is opened, i.e., when the driver exits the vehicle from inside, the entire vehicle can be quickly lowered to facilitate the driver's exit. After closing the driver's door, the vehicle's position returns to its designed position. In manual mode, manual adjustments can be made based on the actual vehicle's needs. This can be done using a physical switch inside the driver's side, a key, or a soft switch on the large screen, making it easier for passengers with limited mobility, such as elderly people, pregnant women, and children, to board and exit the vehicle in the back seat. If the driver is not in the vehicle, the welcome function can also be activated manually, making it easier for passengers to board and exit.

[0072] The vehicle's operating mode may include a safe driving mode. In the vehicle's safe driving mode, the vehicle's pitch angle is suppressed, the axle load transfer is reduced, and the braking distance is shortened. When the vehicle's sensors detect a risk of side collision, the lifting device on the collision side will quickly rise to the upper limit, raising the height of the vehicle body on the collision side so that the vehicle's lower floor can withstand external impact as much as possible, reducing the risk of collision and protecting the driver and passengers. When the risk of side collision disappears, the lifting device can quickly return to its designed state. When the vehicle's sensors detect a risk of front collision, the vehicle's front end will quickly rise to reduce the risk of front collision. After the risk is eliminated, the vehicle's posture will return to its designed state.

[0073] The vehicle's operating modes can include a smooth driving mode. In this mode, the left and right wheels are decoupled from each other, improving driving comfort. When the vehicle passes over a bump or speed bump, the lifting device 10 is controlled to instantly retract the wheel on the impacted side, mitigating the impact and reducing the impact on the vehicle. When the vehicle passes over a pothole, the lifting device 10 is controlled to instantly lift the affected wheel, allowing the tire to instantly contact the pothole, providing sufficient support for the vehicle.

[0074] The vehicle's operating modes may include a loading and unloading mode. In this mode, when the trunk is opened, the lifting device 10 is controlled to rapidly lower the vehicle, making loading and unloading easier. When the trunk is closed, the vehicle's posture returns to its designed state, making it easier to operate.

[0075] The vehicle's operating modes can include a camping mode. In camping mode, the height of the vehicle's four wheels can be independently controlled and adjusted. When parking on uneven surfaces while camping or exploring, the driver can use a one-touch camping leveling switch. The vehicle's posture control module controls the lift device 10 to maintain a level position on uneven surfaces, meeting the user's extreme off-road needs and allowing the user to truly lie flat. When the user finishes camping, the intelligent suspension system (including the lift device 10) automatically exits the camping leveling function the moment the vehicle is started.

[0076] The vehicle's operating modes can include a vehicle protection mode. In vehicle protection mode, if one of the vehicle's lifts becomes blocked or otherwise malfunctions and becomes inoperable, the other lifts will automatically raise or retract to a matching height. All four lifts will be locked simultaneously, no longer receiving external commands, ensuring the vehicle can be driven normally to an after-sales service center.

[0077] When a vehicle is overloaded and the load on one or more lifting devices exceeds the lifting capacity, the intelligent suspension system automatically enters self-protection mode, and the lifting device's screws automatically adjust to their lowest position to protect them from overload. The load is then transmitted through the elastic member, support member, motor end cap, motor housing, and welded brackets on the outer cylinder of the vibration damping device. The mechanical structure limits the load on the screws, releasing the force.

[0078] This vehicle protection mode also provides brake reliability protection. Specifically, each lift is equipped with a separate brake unit that automatically locks when power is off and automatically unlocks when power is on. To ensure brake reliability, the brakes can only be locked when the rotor is stationary or rotating at low speeds, which is achieved through the vehicle controller.

[0079] This vehicle protection mode also provides hill run protection. Specifically, when the wheel height sensor or other sensor detects that the wheel is in the air, and the lifting stroke of the corresponding wheel lift exceeds the cutoff height for the buffer block to be compressed 2 / 3, the lift automatically retracts to the spring disc height below the cutoff height. This prevents excessive compression of the coil spring, which could affect its lifespan, and mitigates the impact load on the lift. The buffer block is an elastic component within the vibration damping device that acts as a limiter during the compression stroke.

[0080] The vehicle's operating modes can include a high-temperature protection mode. In this mode, when the lift device's operating temperature is below 150°C, the power is fully utilized. When the operating temperature is between 150°C and 160°C, power is actively limited, decreasing linearly until it reaches 0 kW. It will be appreciated that the high-temperature protection mode can be implemented using the controller and the temperature sensor 700 described in the above embodiment.

[0081] The vehicle's operating modes can include a vehicle warning mode. In this mode, vehicles equipped with intelligent suspension systems transmit hazardous road condition information collected in the current environment to the cloud, enabling safety warnings, deceleration, or emergency avoidance of vehicles behind them.

[0082] The lifting device 10 of the embodiment of the present application belongs to the category of fully active intelligent suspension of vehicles, has a fast response speed, and can enhance the user's driving experience.

[0083] The above descriptions are merely some embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A lifting device (10), comprising: A driving component (100); An elastic component (200); A transmission component (300), connected to the driving component (100) and the elastic component (200), the driving component (100) being configured to drive the transmission component (300) to move in a first direction, so that the transmission component (300) drives the elastic component (200) to move in the first direction; the transmission component (300) is provided with a receiving cavity (310) extending in the first direction, configured to accommodate a shock absorption device (20); A braking component (400), comprising a first magnetic member (410) and a second magnetic member (420), the first magnetic member (410) being connected to the driving component (100); Wherein, the braking component (400) has a powered-on state and a powered-off state. When the braking component (400) is in the powered-on state, there is a gap between the first magnetic member (410) and the second magnetic member (420) to allow the driving component (100) to drive the transmission component (300) to move; when the braking component (400) is in the powered-off state, the first magnetic member (410) is adsorbed to the second magnetic member (420) to prevent the driving component (100) from driving the transmission component (300) to move.

2. The lifting device (10) according to claim 1, wherein, The first magnetic member (410) includes a first permanent magnet (412), a reset member (413) and a first friction plate, and the second magnetic member (420) includes a second permanent magnet (421), a coil (430) and a second friction plate. There is an attractive magnetic force between the first permanent magnet (412) and the second permanent magnet (421), and the reset member (413) is configured to provide an elastic force to the first permanent magnet (412) to approach the second permanent magnet (421); When the braking component (400) is in the powered-on state, the coil (430) is energized to overcome the attractive magnetic force between the first permanent magnet (412) and the second permanent magnet (421), so that the first magnetic member (410) moves away from the second magnetic member (420), so that there is a gap between the first magnetic member (410) and the second magnetic member (420), and the reset member (413) is deformed; When the braking component (400) is in the powered-off state, the coil (430) is de-energized, the reset member (413) rebounds, and the attractive magnetic force between the first permanent magnet (412) and the second permanent magnet (421) causes the first magnetic member (410) to move towards the second magnetic member (420), so that the first friction plate and the second friction plate are pre-pressed.

3. The lifting device (10) according to claim 1, wherein, The first direction includes a vertical direction, and the braking component (400) is located below the driving component (100) and the transmission component (300) in the vertical direction.

4. The lifting device (10) according to claim 1, wherein, The driving assembly (100) includes a first driving member (110) and a second driving member (120). The second driving member (120) is located inside the first driving member (110). When the first driving member (110) is powered on, the magnetic field generated by the first driving member (110) drives the second driving member (120) to rotate around the central axis of the second driving member (120). The first driving member (110) and the second driving member (120) are annular. The transmission assembly (300) is located inside the second driving member (120), and the transmission assembly (300) is connected to the second driving member (120). The transmission assembly (300) is configured to convert the rotational motion of the second driving member (120) into a linear motion in the first direction.

5. The lifting device (10) according to claim 4, wherein, The transmission assembly (300) includes a first transmission member (320), a second transmission member (330), and a third transmission member (340). The first transmission member (320) is connected to the second driving member (120), and the second driving member (120) is configured to drive the first transmission member (320) to rotate. The second transmission member (330) is located inside the first transmission member (320). The second transmission member (330) is in the shape of a hollow cylinder that penetrates in the first direction to define the receiving cavity (310). The first transmission member (320) is provided with internal threads, and the second transmission member (330) is provided with external threads corresponding to the internal threads of the first transmission member (320). There are multiple third transmission members (340). The multiple third transmission members (340) are engaged with the first transmission member (320) and the second transmission member (330) so as to convert the rotational motion of the first transmission member (320) into a linear motion of the second transmission member (330) in the first direction.

6. The lifting device (10) according to claim 1 further includes a support member (500) configured to support the elastic member (200). The support member (500) is connected to the transmission assembly (300), and the support member (500) is farther from the braking assembly (400) than the transmission assembly (300). Among them, The support member (500) can move in the first direction under the drive of the transmission assembly (300) to drive the elastic member (200) to move in the first direction.

7. The lifting device (10) according to claim 1 further includes: An encoder (600) provided on the transmission assembly (300), configured to monitor the states of the driving assembly (100) and the transmission assembly (300); and / or A temperature sensor (700), configured to monitor the temperatures of the driving assembly (100) and the transmission assembly (300).

8. The lifting device (10) according to claim 1 further includes an outer housing (910). The outer housing (910) defines a receiving cavity, and the driving assembly (100), the transmission assembly (300), and the braking assembly (400) are located in the receiving cavity. Among them, The outer housing (910) includes a first wall and a second wall that are opposite to each other in the first direction, and the outer housing (910) is provided with an opening that penetrates the first wall and the second wall, and is configured to receive the shock absorption device (20).

9. The lifting device (10) according to claim 5 further includes a limit assembly, the limit assembly includes a first bearing (921) and a second bearing (922), both the first bearing (921) and the second bearing (922) are connected to the first transmission member (320), and the first bearing (921) and the second bearing (922) are spaced apart along the first direction.

10. The lifting device (10) according to claim 5, wherein, The transmission assembly (300) is a planetary roller screw pair, the first transmission member (320) is a screw nut, the second transmission member (330) is a screw rod, and the third transmission member (340) is a roller.

11. The lifting device (10) according to claim 6, wherein, The support member (500) includes a buffer portion (510), and the buffer portion (510) is provided at the abutting portion of the elastic member (200) and the support member (500), and is configured to protect the support member (500) and the elastic member (200).

12. The lifting device (10) according to claim 8 further comprises: An oil seal (930) is located between the outer housing (910) and the shock absorption device (20), and is disposed around the shock absorption device (20).

13. The lifting device (10) according to claim 8 further comprises: A sliding sleeve (940) is located between the outer housing (910) and the shock absorption device (20), and is disposed around the shock absorption device (20).

14. A vehicle, comprising: A shock absorption device (20); And The lifting device (10) according to any one of claims 1-13, and the shock absorption device (20) is assembled in the receiving cavity (310).

15. The vehicle according to claim 14, wherein, The shock absorption device (20), the drive assembly (100), the transmission assembly (300) and the brake assembly (400) are coaxially assembled.

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