Lifting device and vehicle

Abstract

The invention provides a lifting device and a vehicle. The lifting device comprises a driving assembly, an elastic piece, a transmission assembly and a braking assembly. The transmission assembly is connected with the driving assembly and connected with the elastic piece, and the driving assembly is used for driving the transmission assembly to move in the first direction, so that the transmission assembly drives the elastic piece to move in the first direction; the braking assembly comprises a first magnetic part and a second magnetic part, and the first magnetic part is connected with the driving assembly; the working state of the brake assembly comprises a power-on state and a power-off state, and when the brake assembly is in the power-on state, a gap is formed between the first magnetic part and the second magnetic part so as to allow the driving assembly to drive the transmission assembly to move; and when the braking assembly is in the power-off state, the driving assembly is prevented from driving the transmission assembly to move. According to the lifting device, the vehicle can be quickly lifted, and the height of the vehicle body can be kept when the vehicle is powered down.

Description

Technical Field

[0001] The present application relates to the technical field of vehicle accessories, and particularly relates to a lifting device and a vehicle. Background Art

[0002] With the diversification of user needs, the usage scenarios of vehicles have also increased accordingly. The passability of a vehicle when encountering insurmountable obstacles or steep slopes in a normal vehicle posture has become an important indicator for measuring vehicle performance.

[0003] However, currently, the methods for adjusting the vehicle height mainly include changing the volume of the air spring, changing the position of the spring tray of the coilover shock absorber, and using a hydraulic shock absorber. When the vehicle loses power, the body height will suddenly change, with low reliability and affecting the user experience. Summary of the Invention

[0004] The present application provides a lifting device and a vehicle that can quickly lock the body height.

[0005] One aspect of the present application provides a lifting device, including:

[0006] A driving component;

[0007] An elastic member;

[0008] A transmission component, connected to the driving component and also connected to the elastic member. The driving component is used to drive the transmission component to move in a first direction, so that the transmission component drives the elastic member to move in the first direction; the transmission component is provided with a receiving cavity extending in the first direction for accommodating a shock absorber.

[0009] A braking component, including a first magnetic member and a second magnetic member, the first magnetic member being connected to the driving component; the working state of the braking component includes an energized state and a de-energized state. When the braking component is in the energized state, there is a gap between the first magnetic member and the second magnetic member to allow the driving component to drive the transmission component to move; when the braking component is in the de-energized state, the first magnetic member adsorbs to the second magnetic member to prevent the driving component from driving the transmission component to move.

[0010] The driving component and the transmission component of the lifting device of the present application can provide a lifting force to quickly lift the vehicle, improve the vehicle passability and off-road ability, and can automatically lock to maintain the body height when the vehicle loses power, with high safety and reliability.

[0011] Furthermore,

[0012] The first magnetic member includes a first permanent magnet, a reset member, and a first friction plate. The second magnetic member includes a second permanent magnet, a coil, and a second friction plate. There is an attractive magnetic force between the first permanent magnet and the second permanent magnet. The reset member is configured to provide an elastic force to the first permanent magnet to move it closer to the second friction plate.

[0013] When the braking assembly is in the energized state, the coil is energized to overcome the attractive magnetic force between the first permanent magnet and the second permanent magnet, causing the first magnetic member to move away from the second magnetic member, creating a gap between the first magnetic member and the second magnetic member, and deforming the reset member. When the braking assembly is in the de-energized state, the coil is de-energized, the reset member rebounds, and the attractive magnetic force between the first permanent magnet and the second permanent magnet causes the first magnetic member to move towards the second magnetic member, pre-pressing the first friction plate and the second friction plate.

[0014] Further, the first direction includes the vertical direction, and the braking assembly is located below the driving assembly and the transmission assembly in the vertical direction.

[0015] Further, the driving assembly includes a first driving member and a second driving member. The second driving member is located inside the first driving member. When the first driving member is energized, the magnetic field generated by the first driving member drives the second driving member to rotate around the central axis of the second driving member. The first driving member and the second driving member are annular. The transmission assembly is located inside the second driving member and is connected to the second driving member. The transmission assembly is configured to convert the rotational motion of the second driving member into a linear motion in the first direction.

[0016] Further, 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 configured to drive the first transmission member to rotate. The second transmission member is located inside the first transmission member. The second transmission member encloses to form the receiving cavity, and the second transmission member is in the shape of a hollow cylinder that penetrates in the first direction. The first transmission member is provided with internal threads, and the second transmission member is provided with external threads corresponding to the internal threads of the first transmission member. There are multiple third transmission members, and the multiple third transmission members mesh with the first transmission member and the second transmission member, so as to convert the rotational motion of the first transmission member into a linear motion of the second transmission member in the first direction.

[0017] Further, the lifting device further includes a support member for supporting the elastic member. The support member is connected to the transmission assembly, and the support member is 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.

[0018] Further, the lifting device further includes an encoder disposed on the transmission assembly for monitoring the states of the driving assembly and the transmission assembly; and / or

[0019] The lifting device further includes a temperature sensor for monitoring the temperatures of the driving assembly and the transmission assembly.

[0020] Further, the lifting device further includes an outer housing which encloses to form a receiving cavity. The driving assembly, the transmission assembly, and the braking assembly are located in the receiving cavity. The outer housing includes a first wall and a second wall opposite to each other in the first direction, and the outer housing is provided with an opening penetrating through the first wall and the second wall for accommodating a damping device.

[0021] Further, the lifting device further includes a limiting assembly including a first bearing and a second bearing, both of which are connected to the first transmission member, and the first bearing and the second bearing are spaced apart along the first direction.

[0022] Another aspect of the present application provides a vehicle, including:

[0023] A damping device; and

[0024] The lifting device according to any one of the above, and the damping device is assembled in the receiving cavity.

[0025] Further, the damping device, the driving assembly, the transmission assembly, and the braking assembly are coaxially assembled. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings herein are incorporated into the specification and form a part of the specification, showing embodiments consistent with the present disclosure, and are used together with the specification to explain the principles of the present disclosure.

[0027] Figure 1 Shown is a schematic structural diagram of an embodiment of a vehicle according to the present application;

[0028] Figure 2 Shown is a schematic structural diagram of an embodiment of a lifting device according to the present application;

[0029] Figure 3 Shown as Figure 2 A cross-sectional schematic diagram of the shown lifting device;

[0030] Figure 4 As shown Figure 2 a partially enlarged schematic view of the lifting device shown above. Specific embodiments

[0031] Here, exemplary embodiments will be described in detail, and examples thereof are shown in the drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0032] The terms used in the present application are for the purpose of describing specific embodiments only and are not intended to limit the present application. Unless otherwise defined, the technical terms or scientific terms used in the present application should have the ordinary meanings understood by those of ordinary skill in the art to which the present application pertains. The terms "first", "second" and similar terms used in the specification and claims of the present application do not denote any order, quantity or importance, but are only used to distinguish different components. Similarly, the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. "Plurality" or "several" means at least two. Unless otherwise specified, terms such as "front", "rear", "lower" and / or "upper" are for convenience of description only and are not limited to one position or a spatial orientation. The terms "comprising" or "including" and the like are intended to cover the elements or items appearing before "comprising" or "including" and their equivalents that appear after the elements or items listed after "comprising" or "including", and do not exclude other elements or items. The terms "connected" or "coupled" and the like are not limited to physical or mechanical connections, and may include electrical connections, whether direct or indirect.

[0033] The singular forms "a", "the" and "said" used in the specification and claims of the present application are also intended to include the plural forms 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.

[0034] The lifting device provided by the present application includes a driving component, an elastic component, a transmission component, and a braking component. The transmission component is connected to the driving component and is also connected to the elastic component. The driving component is used to drive the transmission component to move in a first direction, so that the transmission component drives the elastic component to move in the first direction. The transmission component is provided with a receiving cavity extending in the first direction for accommodating a shock absorption device. The braking component includes a first magnetic member and a second magnetic member, and the first magnetic member is connected to the driving component. The working state of the braking component includes a powered-on state and a powered-off state. When the braking component is in the powered-on state, there is a gap between the first magnetic member and the second magnetic member to allow the driving component to drive the transmission component to move. When the braking component is in the powered-off state, the first magnetic member is adsorbed to the second magnetic member to prevent the driving component from driving the transmission component to move.

[0035] The driving component and the transmission component of the lifting device provided by the present application can provide a lifting force to quickly lift the vehicle, improve the vehicle's passing performance and off-road ability, and can automatically lock to maintain the vehicle body height when the vehicle loses power, with high safety and reliability.

[0036] The vehicle provided by the present application includes a shock absorption device and a lifting device. The shock absorption device is assembled in the receiving cavity of the lifting device.

[0037] The following will describe the lifting device and the vehicle of the present application in detail with reference to the accompanying drawings. Without conflict, the features in the following embodiments and implementation manners can be combined with each other.

[0038] Figure 1 The figure shows a schematic structural diagram of a vehicle 1 according to an embodiment of the present application. The vehicle 1 in the embodiment of the present application mainly includes a new energy vehicle, and the new energy vehicle can further include a pure electric vehicle, a hybrid vehicle, a plug-in hybrid vehicle, and other vehicles using an in-vehicle power battery as the main power source or one of the power sources. The vehicle in the embodiment of the present application includes a shock absorption device 20 and a lifting device 10. The shock absorption device 20 is a device for reducing vibrations and impacts generated during vehicle driving due to uneven road surfaces, bumps, and vehicle vibrations itself. It is located in the vehicle suspension system and can improve riding comfort and vehicle handling stability. In this embodiment, the shock absorption 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 shock absorption device 20. It is fixedly connected by welding a tray on the outer cylinder of the shock absorption device 20, with high load-bearing capacity. In the related art, the lifting device is assembled on the piston rod of the shock absorption device, and it is necessary to utilize a part of the length of the outer cylinder of the shock absorption device, and the layout structure is limited. However, the lifting device 10 in the embodiment of the present application is assembled on the outer cylinder of the shock absorption device 20, and its layout structure is not limited by the shock absorption device 20, and the assembly flexibility is higher.

[0039] In some embodiments, the shock absorption device 20, the driving component 100, the transmission component 300, and the braking component 400 are coaxially assembled.Figure 1 As shown, Y-Y is the axis of the vibration damping device 20, the drive assembly 100, and the transmission assembly 300.

[0040] As Figure 1 shown, specifically, the lower part of the lifting device 10 can be connected to the lower control arm 40, and the lower control arm 40 is connected to the subframe 50 and the steering knuckle 60; the upper part of the lifting device 10 can be connected to the upper mounting bracket 70, and the upper control arm 30 is arranged circumferentially around the lifting device 10.

[0041] Figure 2 The figure shows a schematic structural diagram of an embodiment of the lifting device 10 of the present application. Figure 3 As shown Figure 2 The figure shows a cross-sectional schematic diagram of the lifting device 10. The lifting device 10 of the embodiment of the present application includes a drive assembly 100, an elastic member 200, a transmission assembly 300, and a braking assembly 400. The transmission assembly 300 is connected to the drive assembly 100 and is also connected to the elastic member 200. The drive 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 cavity 310 extending in the first direction for accommodating the vibration damping device 20. The braking assembly 400 includes a first magnetic member 410 and a second magnetic member 420, and the first magnetic member 410 is connected to the drive assembly 100; the working state of the braking assembly 400 includes a powered-on state and a powered-off state. When the braking assembly 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 drive assembly 100 to drive the transmission assembly 300 to move; when the braking assembly 400 is in the powered-off state, the first magnetic member 410 is adsorbed to the second magnetic member 420 to prevent the drive assembly 100 from driving the transmission assembly 300 to move.

[0042] The drive assembly 100 and the transmission assembly 300 of the lifting device 10 of the embodiment of the present application can provide a lifting force to realize rapid vehicle lifting, improve vehicle passability and off-road ability, and can automatically lock to maintain the vehicle body height when the vehicle loses power, with relatively high safety and reliability.

[0043] 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 a slow response, and low reliability, and cannot meet the harsh working conditions under deep off-road of the vehicle; the height adjustment of the coilover shock absorber is inconvenient to operate; the hydraulic shock absorber system is complex, costly, has low reliability, and is prone to problems such as oil leakage. In addition, the above solutions cannot achieve dynamic control of the vehicle tires, contribute limitedly to vehicle handling and comfort, and cannot improve the vehicle's suppression ability in pitching and rolling, and the functions are relatively single. Compared with the above vehicle lifting solutions, the lifting device 10 of this embodiment has advantages in terms of lifting speed, operation convenience and reliability, and machining convenience, etc.

[0044] It should be noted that, as Figure 1 and Figure 3 shown, the straight line Y-Y represents the first direction, that is, the axis of the lifting device 10 and the shock absorber device 20 of the present application. The elastic member 200 may include a helical spring.

[0045] In some embodiments, the power source of the lifting device 10 is a DC voltage, which has characteristics such as a high response frequency and convenient control.

[0046] In some embodiments, the first magnetic member 410 includes a first permanent magnet (not shown), a reset member (not shown), and a first friction plate (not shown), the second magnetic member 420 includes a second permanent magnet (not shown), a coil 430, and a second friction plate (not shown). There is an attractive magnetic force between the first permanent magnet and the second permanent magnet, and the reset member is used to provide an elastic force for the first permanent magnet to approach the second friction plate. When the braking assembly 400 is in the energized state, the coil 430 is energized to overcome the attractive magnetic force between the first permanent magnet and the second permanent magnet, so that the first magnetic member 410 moves in a direction 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 deforms; when the braking assembly 400 is in the de-energized state, the coil 430 is de-energized, the reset member rebounds, and the attractive magnetic force between the first permanent magnet and the second permanent magnet causes the first magnetic member 410 to move in the direction of the second magnetic member 420, so that the first friction plate and the second friction plate are pre-pressed. In the related art, the lifting height cannot be accurately locked after the lifting device lifts. In this embodiment, however, the lifting device 10 can achieve accurate locking at any elevated position of the vehicle, and can achieve automatic locking when powered off, which is safe and reliable, and has a high locking accuracy.

[0047] In this embodiment, the braking assembly 400 can be a permanent magnet brake. The first magnetic member 410 is the brake rotor assembly, the second magnetic member 420 is the brake stator assembly, and the reset member is a return plate spring. Specifically, when the coil 430 is energized, a magnetic force is generated, overcoming the magnetic forces generated by the first permanent magnet and the second permanent magnet, pushing the brake rotor assembly, and deforming the return plate spring, resulting in a gap between the brake rotor assembly and the brake stator assembly, achieving unlocking. The transmission assembly 300 moves in the first direction under the interaction of electromagnetic forces. When the brake stator winding 130 is de-energized, only the attracting magnetic forces generated by the first permanent magnet and the second permanent magnet exist, and the return plate spring automatically deforms to eliminate the gap, realizing the contact preloading and locking of the first friction plate and the second friction plate. The braking assembly 400 in this embodiment can lock the height position of the transmission assembly 300 in real time.

[0048] In some embodiments, the first direction includes the vertical direction, and the braking assembly 400 is located below the driving assembly 100 and the transmission assembly 300 in the vertical direction, so as to ensure that the vehicle height does not drop due to gravity impact.

[0049] In some embodiments, 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 energized, 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 used to convert the rotational motion of the second driving member 120 into a linear motion in the first direction. In this embodiment, the driving assembly 100 includes a motor, the first driving member 110 is the stator, and the second driving member 120 is the rotor. The driving assembly 100 in this embodiment can also include a winding 130. After the winding 130 is energized, a rotating magnetic field is generated to drive the rotor to rotate. Further, the above-mentioned motor can include an annular motor, and the motor can be a DC brushless motor with a working voltage of 48V.

[0050] 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 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 encloses to form a receiving cavity 310, and the second transmission member 330 is in the shape of a hollow cylinder that penetrates in the first direction. The first transmission member 320 is provided with an internal thread, and the second transmission member 330 is provided with 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 are engaged with the first transmission member 320 and the second transmission member 330, so that the rotational motion of the first transmission member 320 is converted into a linear motion of the second transmission member 330 in the first direction. In this embodiment, the transmission assembly 300 can be a planetary roller screw pair, the first transmission member 320 is a nut, the second transmission member 330 is a screw, and the third transmission member 340 is a roller.

[0051] Specifically, the rotor in the motor can be matched with the roller screw. When the motor generates torque and the rotor rotates, it also drives the nut to rotate. Since the inner surface of the nut, the surface of the roller, and the area where the screw and the roller are engaged contain raceways. When the nut rotates driven by the rotor, the rollers rotate in the reverse direction, indirectly causing the screw to form an axial linear motion. When the screw performs a linear axial motion through the rotation of the motor rotor, and 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 a linear axial motion in the first direction. By changing the stiffness of the elastic member 200, the vehicle height is optimized, thereby improving the riding comfort.

[0052] In the related art, the vehicle is lifted through the transmission cooperation between the screw and the nut. However, the lifting device 10 in the embodiment of the present application utilizes a planetary roller screw pair for torque amplification and lifting, with a large transmission ratio and strong lifting force.

[0053] The lifting device 10 in the embodiment of the present application is hardware-safe and reliable, and can meet the vehicle use environment under different working conditions.

[0054] In some embodiments, the lifting device 10 further includes a limiting assembly, including a first bearing 921 and a second bearing 922, both of which 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. The first bearing 921 and the second bearing 922 can include ball bearings. The roller bearings can bear radial and axial forces and play a limiting role on the driving assembly 100.

[0055] 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 away from the braking assembly 400 relative to the transmission assembly 300. 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. Further, the support member 500 may 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, which can protect the support member 500 and the elastic member 200 and extend the service life. The buffer portion 510 can be made of an elastic material, such as a rubber material.

[0056] In some embodiments, the lifting device 10 further includes an outer housing 910. The outer housing 910 encloses to form an accommodation cavity, and the drive assembly 100, the transmission assembly 300, and the braking assembly 400 are located in the accommodation cavity. The outer housing 910 includes a first wall and a second wall that are opposite in the first direction. The outer housing 910 is provided with an opening portion penetrating through the first wall and the second wall for accommodating the damping device 20. The lifting device 10 may further include a support plate 950 and an end cover 960. As Figure 3 shown, the support plate 950 can be bolted to the support member 500, and the end cover 960 can be bolted to the outer housing 910 to achieve better sealing performance and waterproof performance.

[0057] In the lifting device 10 according to the embodiment of the present application, lubricating oil can be provided between each moving part, such as the transmission assembly 300 and the drive assembly 100, which can improve the service life of the lifting device 10 and reduce the noise generated during operation to a certain extent.

[0058] On the basis of the above embodiments, the lifting device 10 may further include an oil seal 930. The oil seal 930 is a sealing device for preventing lubricant leakage. As Figure 3 shown, in this embodiment, the oil seal 930 is located between the outer housing 910 and the damping device 20 and is arranged around the outer cylinder of the damping device 20 to prevent the lubricant from leaking from the gap between the damping device 20 and the outer housing 910. The oil seal 930 can effectively prevent the leakage of lubricating oil or grease and block external contaminants from entering the equipment interior to ensure the normal operation of the lifting device 10. Optionally, the oil seal 930 may be composed of a metal housing, a spring, and a rubber sealing ring. Specifically, the sealing ring applies pressure to the damping device 20 and fits tightly with it to form an effective sealing and protection layer. The lifting device 10 according to the embodiment of the present application has good sealing performance, and the waterproof grade can reach above IP68.

[0059] In some embodiments, the lifting device 10 may further include a sliding sleeve 940. The sliding sleeve 940 is a mechanical part for reducing friction and wear. As Figure 3As shown, in this embodiment, the sliding sleeve 940 is located between the outer housing 910 and the shock absorption device 20, and is disposed around the outer cylinder of the shock absorption device 20, playing roles of support, guidance and protection, and can achieve the function of limiting the lead screw, reducing the friction and wear between components, extending the service life of the mechanical equipment, and ensuring the normal operation of the equipment. Optionally, the sliding sleeve 940 can be made of metal materials such as copper, aluminum, steel, etc.

[0060] In some embodiments, the lifting device 10 further includes an encoder 600 disposed on the transmission assembly 300 for monitoring the states of the driving assembly 100 and the transmission assembly 300. The encoder can include an encoder circuit board and an encoder magnetic ring, and can record in real time the rotation direction and number of turns of the rotor of the driving device, as well as the working stroke position of the lead screw, providing feasibility for the implementation of the function control logic. The encoder 600 can be integrated inside the lifting device 10 to achieve a high integration degree of the lifting device 10.

[0061] Figure 4 As shown Figure 2 The partial enlarged schematic view of the lifting device 10 shown. In some embodiments, the lifting device 10 further includes a temperature sensor 700 for monitoring the temperatures of the driving assembly 100 and the transmission assembly 300. The temperature sensor 700 can be integrated inside the lifting device 10, facilitating the real-time monitoring of the working state of the motor, which is safe and reliable. In summary, the lifting device 10 assembly in the embodiment of the present application has a high integration degree and is flexible and convenient to arrange.

[0062] Such as Figure 4 As shown, the lifting device 10 in the embodiment of the present application can further include a connection wire harness 800. Through the connection wire harness 800, a power source can be provided for each component, and communication connection with an external controller can be achieved to realize information interaction, facilitating control.

[0063] The main function of the lifting device 10 in the embodiment of the present application is to lift the vehicle, increase the ground clearance of the vehicle, increase the approach angle, departure angle and longitudinal passing angle of the vehicle, enabling the vehicle to easily pass over obstacles or steep slopes that are difficult to overcome in the normal vehicle posture, and increasing the usage scenarios of the vehicle. In addition, the lifting device 10 belongs to the category of fully active intelligent suspension and is a key component in the advanced magic carpet suspension. The lifting device 10 in the embodiment of the present application has the advantages of convenient adjustment, fast lifting speed, high efficiency, stepless continuously adjustable lifting height. Compared with general air springs, it has a faster adjustment speed, a wider adjustment stroke and the highest reliable performance, enabling the vehicle to easily cope with harsh working conditions such as stone roads, bomb craters, and flying breaks in deep off-road working conditions. The lifting device 10 in the embodiment of the present application can dynamically control the four wheels of the vehicle respectively, greatly improving the comfort of the vehicle, and can also greatly improve the pitch angle of the vehicle under emergency braking and rapid acceleration conditions, the roll angle of the vehicle during emergency cornering, and improve the handling stability of the vehicle, bringing a better driving experience to users.

[0064] The lifting device 10 of the embodiment of the present application can interact with other vehicle sensor signals, and realizes real-time dynamic control of each wheel through the controller, with a high response frequency, can quickly and conveniently lift the vehicle, greatly improving the handling, comfort and safety of the vehicle, and can give users a smooth driving experience even under harsh working conditions.

[0065] The lifting device 10 in any of the above embodiments of the present application can be applied to a variety of vehicle functional scenarios. Corresponding to different functional scenarios, the vehicle can include a variety of working modes. The lifting device 10 of the embodiment of the present application can be applied to the following multiple working modes.

[0066] Specifically, the working mode of the vehicle can include a vehicle roll control mode. In the vehicle roll control mode, the lifting device 10 can replace the functions of the front and rear traditional passive stabilizer bars and active stabilizer bars. The sensors on the vehicle can real-time monitor the vehicle roll state and provide lateral force support for the vehicle. For example, when the vehicle enters a curve, the linear motors on the two inner wheels will actively contract, and the support member 500 will move downward by a stroke H1 within a specified time t1. The motors on the two outer wheels can actively extend, and the support member 500 will move upward by a stroke H2 within a specified time t2 to improve the vehicle roll angle. After the wheels exit the curve, the inner and outer linear motors can quickly return to the balanced state. The vehicle roll state can also be identified through the vehicle speed signal and the steering wheel angle sensor signal, or monitored by the vehicle roll sensor. The above sensors can be arranged as close as possible to the vehicle center of mass. It can also be combined with a vision sensor, which has a function of pre-aiming in advance when entering a curve, and the lifting state of the motor can be maintained for a long time.

[0067] The working mode of the vehicle can include a vehicle pitch control mode. In the vehicle pitch control mode, when the vehicle accelerates suddenly, according to the acceleration value of the vehicle, the motors on both sides of the front suspension will instantaneously and actively contract within a specified time, and the support member 500 will move downward to reduce the height of the front wheel arch. At the same time, the motors on both sides of the rear suspension will instantaneously and actively extend within a specified time to provide support force for the rear of the vehicle and reduce the vehicle's tendency to lift its head. When the acceleration value is 0 m / s2 or close to 0 m / s2, the front and rear motors will return to the designed state. When the vehicle brakes or decelerates suddenly, according to the deceleration value of the vehicle, the motors on both sides of the front suspension will instantaneously and actively extend within a specified time, and the support member 500 will move upward to increase the height of the front wheel arch. At the same time, the motors on both sides of the rear suspension will instantaneously and actively contract and extend within a specified time to provide support force for the front of the vehicle and reduce the vehicle's tendency to nod. When the deceleration value is 0 m / s2 or close to 0 m / s2, the front and rear motors will return to the designed state. It should be noted that whether the vehicle pitch control needs to be controlled by the front and rear axle motors simultaneously or by a single axle motor needs to be finally determined according to the software calibration result, and the present application does not make any restrictions.

[0068] The working mode of the vehicle may include a vehicle escape lift mode. In the vehicle escape lift mode, when the vehicle is in a bad working condition such as mud, sand, snow, steep slope, etc., the vehicle can control the lifting device 10 to realize automatic lifting of the chassis, increase the ground clearance, increase the vehicle approach angle, departure angle and passing angle, and improve the off-road passability of the vehicle. After being networked with the environmental sensor, that is, the camera road data collection, the road condition can be identified in advance. When the vehicle is driving on a pothole road, the lifting device 10 of the embodiment of the present application can always keep any lowered wheel in contact with the ground and provide driving force.

[0069] The working mode of the vehicle may include an entertainment mode. In the entertainment mode, when the vehicle is stationary or driving at a low speed, the four wheels of the vehicle may rise and fall independently and rhythmically by controlling the lifting device 10 according to a preset entertainment mode, such as a light music entertainment mode and a rock and roll dynamic entertainment mode. The rhythmic jumping of the vehicle may bring a sense of pleasure to the driver or passengers. Of course, in this mode, the vehicle may also rise and fall according to the rhythm of the music. It should be noted that, to ensure safety, the entertainment mode can only be turned on when there are drivers and passengers in the vehicle.

[0070] The working mode of the vehicle may include a welcoming mode. In the welcoming mode of the vehicle, the vehicle can automatically turn on the welcoming mode, and the user can also turn it on manually. Specifically, in the automatic opening mode, when the driver's side door is opened, that is, the driver goes from outside the car to inside the car, by controlling the lifting device 10, the vehicle can be quickly raised as a whole, which is convenient for the driver to get on the car. When the driver's side door is closed, the vehicle can be quickly lowered as a whole to restore to the design state. When the driver's side door is opened, that is, the driver goes from inside the car to outside the car, the vehicle can be quickly lowered as a whole to facilitate the driver to get off the car, and the vehicle posture is restored to the design state after closing the door. In manual mode, manual adjustment can be performed according to the needs of the actual vehicle. It can be a physical switch in the driver's side car, a key or a soft switch on the large screen, which can facilitate the elderly, pregnant women, children and other users with limited mobility in the back row to get on and off the car. If the driver's cab personnel have not entered the vehicle, the vehicle welcoming function can also be realized by manually opening it, so as to facilitate the passengers to get on and off the car.

[0071] The working mode of the vehicle may include a safe driving mode. In the safe driving mode, the pitch angle of the vehicle is suppressed, the axle load transfer is reduced, and the braking distance is shortened. When the vehicle sensor detects a risk of collision on the side, the motor 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 lower floor of the vehicle can receive 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 motor can quickly return to the design state. When the vehicle sensor detects a risk of collision in front, the front of the vehicle will rise quickly to reduce the risk of front collision. After the risk is eliminated, the vehicle posture returns to the design state.

[0072] The working modes of the vehicle can include a smooth driving mode of the vehicle. In the smooth driving mode of the vehicle, the correlation between the left and right wheels can be decoupled, improving the driving comfort of the vehicle. When the vehicle passes through road surfaces such as bumps or speed bumps, by controlling the lifting device 10, the motor of the wheel on the impacted side will instantaneously contract, mitigating the road impact, thereby reducing the impact intensity of the road surface on the vehicle. When the vehicle passes through a pothole road surface, by controlling the lifting device 10, the motor of the affected wheel will instantaneously lift, and the tire will instantaneously contact the ground, providing sufficient supporting force for the vehicle.

[0073] The working modes of the vehicle can include a loading and unloading mode of the vehicle. In the loading and unloading mode of the vehicle, when the trunk of the vehicle is opened, by controlling the lifting device 10, the whole vehicle will quickly lower, improving the convenience of loading goods into the vehicle. When the trunk of the vehicle is closed, the vehicle attitude will return to the designed state, facilitating vehicle driving;

[0074] The working modes of the vehicle can include a camping mode of the vehicle. In the camping mode of the vehicle, the heights of the four wheels of the vehicle can be independently controlled and adjusted. When parking on a bumpy road surface during outdoor camping or exploration, the driver can operate a one-key camping leveling switch, and the vehicle attitude control module can control the lifting device 10 to keep the vehicle in a horizontal state on different bumpy road surfaces, meeting the user's extreme off-road needs. When the user finishes camping, at the moment when the vehicle starts, the linear motor intelligent suspension system and the lifting device 10 will automatically exit the camping leveling function.

[0075] The working modes of the vehicle can include a protection mode of the vehicle. In the protection mode of the vehicle, when a certain linear motor of the vehicle is blocked or fails to work due to other reasons, the other linear motors will automatically lift or contract to the matching height position, and the four linear motors will be locked simultaneously and no longer receive external instructions, ensuring that the vehicle can drive normally to the after-sales maintenance point.

[0076] When the vehicle is overloaded, and the load borne by one or several linear motors exceeds the lifting force, the linear motor system will automatically enter the self-protection mode, and the linear motor screw rod will actively adjust to the lowest position to protect the motor screw rod from overload. At this time, the load is transmitted by the elastic member, the support member, the motor end cover, the motor housing, and the welding bracket of the shock absorber outer cylinder, and the force on the screw rod is released through mechanical structure limiting.

[0077] In this mode, brake reliability protection can also be provided. Specifically, each linear motor is equipped with a separate brake unit, which automatically locks when the motor is powered off and automatically unlocks when powered on. To ensure the reliability of the brake, the brake can only lock when the rotor is stationary or rotating at a low speed, which is achieved through the vehicle controller.

[0078] In this mode, break-through protection can also be provided. Specifically, when the wheel height sensor or other sensors detect that the wheel is in the air, and the lifting stroke of the linear motor on the corresponding lifted side wheel exceeds 2 / 3 of the cut-off height of the buffer block compression, the linear motor will automatically contract to the height of the spring disc corresponding to below the cut-off height. First, it can prevent the helical spring from being compressed and affecting its lifespan. Second, it can relieve the impact load on the linear motor.

[0079] The working mode of the vehicle can include a high-temperature protection mode. In the high-temperature protection mode of the vehicle, when the operating temperature of the motor is below 150°C, the power can be turned on at 100%. When the operating temperature is between 150°C and 160°C, active power limitation is required, and it linearly decreases until it reaches 0 KW. It can be understood that the high-temperature protection mode can be completed with the help of the controller and the temperature sensor 700 in the above embodiments.

[0080] The vehicle high-temperature protection mode is the vehicle warning mode. In the vehicle warning mode, the vehicle equipped with the intelligent suspension system will transmit the dangerous road condition information collected in the current environment to the cloud, and can achieve safety warnings, speed reduction or emergency avoidance for the following vehicles.

[0081] The lifting device 10 of the embodiment of the present application belongs to the category of the vehicle's fully active intelligent suspension, with a fast response speed, and can improve the driving experience of users.

[0082] For the method embodiments, since they basically correspond to the device embodiments, the relevant parts can be referred to the partial descriptions of the device embodiments. The method embodiments and the device embodiments complement each other.

[0083] The above are only the preferred 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 within the scope of protection of the present application.

Claims

1. A lifting device, characterized in that, Comprising: A driving component; An elastic component; A transmission component, connected to the driving component and connected to the elastic component. The driving component is used to drive the transmission component to move in a first direction, so that the transmission component drives the elastic component to move in the first direction; the transmission component is provided with a receiving cavity extending in the first direction for accommodating a damping device; A braking component, including a first magnetic member and a second magnetic member, the first magnetic member is connected to the driving component; the working state of the braking component includes a powered-on state and a powered-off state. When the braking component is in the powered-on state, there is a gap between the first magnetic member and the second magnetic member to allow the driving component to drive the transmission component to move; when the braking component is in the powered-off state, the first magnetic member is adsorbed on the second magnetic member to prevent the driving component from driving the transmission component to move.

2. The lifting device according to claim 1, wherein The first magnetic member includes a first permanent magnet, a reset member and a first friction plate, the second magnetic member includes a second permanent magnet, a coil and a second friction plate, there is an attractive magnetic force between the first permanent magnet and the second permanent magnet, and the reset member is used to provide an elastic force for the first permanent magnet to approach the second friction plate; When the braking component is in the powered-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 member moves in a direction away from the second magnetic member, so that there is a gap between the first magnetic member and the second magnetic member, and the reset member is deformed; when the braking component is in the powered-off state, the coil is de-energized, the reset member rebounds, and the attractive magnetic force between the first permanent magnet and the second permanent magnet causes the first magnetic member to move in the direction of the second magnetic member, so that the first friction plate and the second friction plate are pre-pressed.

3. The lifting device according to claim 1, wherein, The first direction includes the vertical direction, and the braking component is located below the driving component and the transmission component in the vertical direction.

4. The lifting device according to claim 1, wherein The driving component includes a first driving member and a second driving member, the second driving member is located inside the first driving member. When the first driving member is energized, the magnetic field generated by the first driving member drives the second driving member to rotate around the central axis of the second driving member; the first driving member and the second driving member are annular, the transmission component is located inside the second driving member, and the transmission component is connected to the second driving member. The transmission component is used to convert the rotational motion of the second driving member into a linear motion in the first direction.

5. The lifting device according to claim 4, wherein, 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 configured to drive the first transmission member to rotate. The second transmission member is located within the first transmission member. The second transmission member encloses to form the receiving cavity, and the second transmission member is in a hollow cylindrical shape that penetrates in the first direction. 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. There are multiple third transmission members, and the multiple third transmission members mesh with the first transmission member and the second transmission member, so that the rotational motion of the first transmission member is converted into a linear motion of the second transmission member along the first direction.

6. The lifting device according to claim 1, wherein The lifting device further includes a support member for supporting the elastic member. The support member is connected to the transmission assembly, and the support member is 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.

7. The lifting device according to claim 1, wherein, The lifting device further includes an encoder provided on the transmission assembly for monitoring the states of the driving assembly and the transmission assembly; and / or The lifting device further includes a temperature sensor for monitoring the temperatures of the driving assembly and the transmission assembly.

8. The lifting device according to claim 1, characterized in that, The lifting device further includes an outer housing. The outer housing encloses to form a receiving cavity, and the driving assembly, the transmission assembly, and the braking assembly are located within the receiving cavity. The outer housing includes a first wall and a second wall that are opposite to each other in the first direction. The outer housing is provided with an opening that penetrates through the first wall and the second wall for accommodating a damping device.

9. The lifting device according to claim 5, wherein The lifting device further includes a limiting assembly including a first bearing and a second bearing, both of which are connected to the first transmission member, and the first bearing and the second bearing are spaced apart along the first direction.

10. A vehicle, characterized in that, Comprising: A damping device; And The lifting device according to any one of claims 1-9, wherein the damping device is assembled in the receiving cavity.

11. The vehicle according to claim 10, wherein, The damping device, the driving assembly, the transmission assembly, and the braking assembly are coaxially assembled.

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