Automobile suspension device using magnetic suspension and anti-impact method thereof

Abstract

The invention relates to an automobile suspension device utilizing magnetic suspension and an anti-impact method of the automobile suspension device. The automobile suspension device comprises a frame (1), an axle (2), a suspension tray, a first magnet assembly (4), a second magnet assembly (5), an electromagnetic coil (6), a guide pipe (7), a spiral spring (8), a variable resistor (9) and a controller (10). The suspension tray is fixed on an axle (2); the lower end of the second magnet assembly (5) is hinged to the suspension tray, and the upper end is inserted into the guide pipe (7). The upper end of the guide pipe (7) is fixedly connected with the first magnet assembly (4), and the first magnet assembly (4) is fixed to the frame (1). The invention has the advantages that: through the magnetic suspension principle, the vibration and impact are effectively reduced, when the road surface is uneven, the magnetic force can be automatically adjusted to maintain the stability of the vehicle body, the mechanical hard collision is avoided, and the more comfortable driving experience is provided.

Description

Technical Field

[0001] This invention relates to a car suspension device utilizing magnetic levitation and its shock-absorbing method, belonging to the automotive field. Background Technology

[0002] Modern automobiles widely utilize technologies such as MacPherson strut suspension, double wishbone multi-link suspension, air suspension, and electronic suspension. The MacPherson strut suspension is simple in structure, low in cost, and occupies little space. It mainly consists of shock absorbers and lower control arms. The shock absorbers provide support and damping, while the lower control arms connect to the wheels for steering and positioning. However, its ability to buffer impacts and vibrations under complex road conditions is poor, affecting passenger comfort. The double wishbone multi-link suspension can better control wheel movement and improve handling stability. It consists of upper and lower wishbones, shock absorbers, and multiple links. The upper and lower wishbones keep the wheels properly positioned during vertical movement, while the multi-links further constrain wheel movement. However, its complex structure and numerous components lead to increased costs and greater maintenance difficulty. Air suspension adjusts vehicle height and damping by inflating and deflating air springs. It utilizes components such as air pumps, air springs, and shock absorber dampers to work together, regulating the air pressure within the air springs to achieve damping and height adjustment. However, it is highly dependent on the air supply, and components like the air pump are susceptible to environmental factors, resulting in high manufacturing costs. Electronic suspension uses electronic control units and sensors to monitor road conditions and vehicle status in real time, automatically adjusting shock absorber damping and vehicle height. This constitutes a complex electronic system including control units, sensors, and shock absorbers. However, electronic components are expensive, leading to high after-sales maintenance and repair costs.

[0003] In addition, existing automotive suspension systems have the following shortcomings: First, their mechanical structures are susceptible to impact; when encountering large bumps, the shock absorbers and lower control arms of the MacPherson strut suspension are easily damaged by impact forces. Second, height adjustment is inflexible; although air suspension and electronic suspension can adjust the vehicle height, their response speed and adjustment precision are limited. Third, energy consumption is high; electronic suspension requires continuous power to maintain the operation of electronic components, and the frequent operation of the air pump in air suspension also increases energy consumption. This invention aims to effectively solve these problems. Summary of the Invention

[0004] To overcome the shortcomings of existing technologies, this invention provides a car suspension device utilizing magnetic levitation and its shock-absorbing method. The technical solution of this invention is as follows:

[0005] A car suspension device utilizing magnetic levitation includes a frame (1), an axle (2), a suspension tray, a first magnet assembly (4), a second magnet assembly (5), an electromagnetic coil (6), a conduit (7), a coil spring (8), a variable resistor (9), and a controller (10); the suspension tray is fixed to the axle (2); the lower end of the second magnet assembly (5) is hinged to the suspension tray, and the upper end is inserted into the conduit (7); the upper end of the conduit (7) is fixedly connected to the first magnet assembly (4), and the first magnet assembly (4) is fixed to the frame (1); the electromagnetic coil (6) is arranged around the outside of the conduit (7) and is connected via... The dust cover is sealed and fixed to the vehicle frame (1); the helical spring (8) is sleeved on the outside of the electromagnetic coil (6), and the two ends of the helical spring (8) are respectively supported on the vehicle frame (1) and the axle (2); the variable resistor (9) is located on one side of the helical spring (8), the upper end of the variable resistor (8) is installed on the vehicle frame (1), and the lower end is fixed on the axle (2); the controller (10) is electrically connected to the variable resistor (9), the electromagnetic coil (6) and the car battery respectively; the controller (10) adjusts the current intensity of the input electromagnetic coil (6) through the variable resistor (9) to control the magnitude of the magnetic force.

[0006] The variable resistor (9) includes an upper resistor (91) and a lower resistor (92) that are slidably connected to each other. The upper resistor (91) is fixed on the frame (1), and the lower resistor (92) is fixed on the axle (2).

[0007] The first magnet assembly (4) is an electromagnet; the second magnet assembly (5) is a cylindrical permanent magnet or an electromagnet;

[0008] The electromagnetic coil (6) includes several independent sub-coils; the variable resistor (9) has several contacts, and each contact corresponds to and is linked with the switch of the sub-coil (61).

[0009] The contacts of the variable resistor (9) slide with the relative displacement of the axle (2) and the frame (1), sequentially switching on and off the circuits of the corresponding sub-coils.

[0010] The conduit (7) is made of a highly magnetically permeable material and is used to guide the axial movement of the second magnet assembly (5); after the electromagnetic coil (6) is energized, it generates the same magnetic poles with the second magnet assembly (5) to form a repulsive force and achieve magnetic levitation.

[0011] The helical spring (8) provides mechanical support when magnetic levitation fails and works in conjunction with magnetic force to adjust the height of the frame (1).

[0012] When the axle (2) moves down, the variable resistor (9) increases the current, causing the second magnet assembly (5) to extend and maintain the height of the frame (1); when the axle (2) moves up, the variable resistor (9) decreases the current, and the second magnet assembly (5) resets under the action of magnetic force and helical spring (8).

[0013] A shock-absorbing method based on the aforementioned automotive suspension system utilizing magnetic levitation includes the following steps:

[0014] S1. Normal magnetic levitation maintenance: The controller (10) inputs a reference current to the electromagnetic coil (6) through the variable resistor (9), so that the second magnet assembly (5) and the electromagnetic coil (6) form a repulsive force between the same magnetic poles; the repulsive force is balanced with the elastic force of the helical spring (8) to maintain the initial distance between the frame (1) and the axle (2) and avoid mechanical hard contact;

[0015] S2. Road surface depression response: When the wheel drives into the pothole, causing the axle (2) to move down, the axle (2) drives the lower resistor (92) of the variable resistor (9) to move down; the lower resistor (92) and the upper resistor (91) slide relative to each other, reducing the resistance value, so that the current output by the controller (10) to the electromagnetic coil (6) is increased.

[0016] After the current is enhanced: the magnetic pole on the lower end face of the first magnet assembly (4) is strengthened to be the N pole, and the repulsive force between it and the N pole on the upper end face of the second magnet assembly (5) increases; the multi-segment sub-coils of the electromagnetic coil (6) are energized in sequence according to the sliding contact sequence, and the enhanced repulsive magnetic field is generated in the axial segment of the second magnet assembly (5); the increased magnetic repulsive force pushes the second magnet assembly (5) to extend along the axial direction of the guide tube (7), which counteracts the downward displacement of the axle (2) and keeps the frame (1) highly stable;

[0017] S3. Road bump response: When the wheel drives out of a pothole or encounters a bump, causing the axle (2) to move upward, the lower resistor (92) of the variable resistor (9) moves upward; the relative sliding between the lower resistor (92) and the upper resistor (91) decreases, increasing the resistance value, and the controller (10) reduces the output current; after the current weakens: the magnetic repulsion decreases, and the helical spring (8) releases the compression potential energy; under the combined action of the restoring force of the helical spring and the residual magnetic repulsion, the second magnet assembly (5) contracts and resets along the axial direction of the guide tube (7); the frame (1) rises smoothly to avoid rigid impact;

[0018] S4. Failure protection mechanism: In case of power failure or malfunction, the helical spring (8) independently supports the relative displacement of the frame (1) and the axle (2); the deformation of the helical spring absorbs the impact of the road surface and prevents the frame and the axle from colliding directly.

[0019] The advantages of this invention are:

[0020] 1. Significantly improve passenger comfort: Through the principle of magnetic levitation, vibration and impact are effectively reduced. When encountering uneven road surfaces, the magnetic force can be automatically adjusted to maintain the stability of the vehicle body, avoid mechanical hard collisions, and provide a more comfortable driving experience.

[0021] 2. Cost control advantages: Compared with traditional air suspension and electronic suspension, the structure is relatively simple, reducing reliance on high-cost components (such as air pumps and complex electronic components), thus reducing production costs and subsequent maintenance costs.

[0022] 3. Highly efficient and reliable safety guarantee: The failure protection mechanism is ingeniously designed. In the event of power failure or malfunction, the coil spring can independently support and absorb the impact, preventing direct collision between the frame and the axle, which greatly enhances driving safety.

[0023] 4. Precise and flexible height adjustment: The variable resistor and the electromagnetic coil work together to automatically adjust the current to control the magnetic force according to road conditions, making the vehicle height adjustment more precise and flexible, and better adapting to various complex road conditions.

[0024] 5. Excellent energy efficiency: It mainly relies on electrical energy to drive the electromagnetic coil to generate magnetic force. The energy consumption is low during normal operation. In the magnetic levitation working state, there is no direct mechanical friction between the parts, which further reduces energy loss. Compared with the traditional suspension system, it has a greater energy-saving advantage and improves the energy utilization efficiency of the car. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the main structure of the first embodiment of the present invention.

[0026] Figure 2 This is a schematic diagram of the main structure of the second embodiment of the present invention.

[0027] Figure 3 This is a diagram showing the state of the invention when it is installed in the pit.

[0028] Figure 4 This is a state diagram of the present invention when it is in a high position. Detailed Implementation

[0029] The present invention will be further described below with reference to specific embodiments, and the advantages and features of the present invention will become clearer as a result. However, these embodiments are merely exemplary and do not constitute any limitation on the scope of the present invention. Those skilled in the art should understand that modifications or substitutions can be made to the details and form of the technical solutions of the present invention without departing from the spirit and scope of the present invention, but all such modifications and substitutions fall within the protection scope of the present invention.

[0030] See Figures 1 to 4This invention relates to a magnetically levitated automotive suspension device, comprising a frame 1, an axle 2, a suspension tray, a first magnet assembly 4, a second magnet assembly 5, an electromagnetic coil 6, a conduit 7, a coil spring 8, a variable resistor 9, and a controller 10; the suspension tray is fixed to the axle 2; the lower end of the second magnet assembly 5 is hinged to the suspension tray, and the upper end is inserted into the conduit 7; the upper end of the conduit 7 is fixedly connected to the first magnet assembly 4, and the first magnet assembly 4 is fixed to the frame 1; the electromagnetic coil 6 is arranged around the outside of the conduit 7, and... The coil spring 8 is sealed and fixed to the frame 1 by a dust cover; the coil spring 8 is sleeved on the outside of the electromagnetic coil 6, and the two ends of the coil spring 8 are respectively supported on the frame 1 and the axle 2; the variable resistor 9 is located on one side of the coil spring 8, the upper end of the variable resistor 8 is mounted on the frame 1, and the lower end is fixed on the axle 2; the controller 10 is electrically connected to the variable resistor 9, the electromagnetic coil 6 and the car battery respectively; the controller 10 adjusts the current intensity input to the electromagnetic coil 6 through the variable resistor 9 to control the magnetic force.

[0031] Based on the above structural design, the following advantages are achieved:

[0032] 1. Significantly Enhanced Passenger Comfort: Utilizing the principle of magnetic levitation, the controller adjusts the current in the electromagnetic coil, creating a repulsive force between the second magnet assembly and the electromagnetic coil. This maintains the initial distance between the chassis and the axle under normal conditions, avoiding hard mechanical contact. When the wheels encounter potholes or bumps, the device automatically adjusts the magnetic force to counteract axle displacement, maintaining chassis height stability, effectively reducing vibration and impact, and providing a more comfortable driving experience.

[0033] 2. Cost Control Advantages: Compared to traditional air suspension and electronic suspension, this device has a relatively simple structure, reducing reliance on high-cost components (such as air pumps and complex electronic components). Furthermore, the magnetic levitation system primarily relies on electrical energy to drive electromagnetic coils to generate magnetic force during operation, resulting in low energy consumption during normal operation. Additionally, the absence of direct mechanical friction between components during magnetic levitation further reduces energy loss, thereby lowering production and maintenance costs.

[0034] 3. Reliable failure protection mechanism: In the event of power failure or malfunction, the coil spring can independently support the relative displacement of the frame and axle, absorb road impacts during deformation, prevent direct collision between the frame and axle, greatly enhance driving safety, and provide reliable failure protection.

[0035] The variable resistor 9 includes an upper resistor section 91 and a lower resistor section 92 that are slidably connected to each other. The upper resistor section 91 is fixed to the frame 1, and the lower resistor section 92 is fixed to the axle 2. The contacts of the variable resistor 9 slide with the relative displacement between the axle 2 and the frame 1, sequentially switching the circuits of corresponding sub-coils on and off. The variable resistor 9 has the following advantages:

[0036] 1. Dynamic Adjustment Capability: During vehicle operation, the variable resistor can sense the relative displacement between the axle and the chassis in real time. When the vehicle encounters potholes or uneven road surfaces causing the axle to shift downwards, the lower resistor slides relative to the upper resistor, reducing its resistance value. This increases the current input to the electromagnetic coil, enhancing the magnetic levitation force and maintaining vehicle height stability. Conversely, when the axle shifts upwards, the resistance increases, the current decreases, the magnetic levitation force weakens, and the coil spring pushes the assembly back to its original position. This dynamic adjustment mechanism effectively responds to changes in road surface conditions, improving driving stability.

[0037] 2. Structural Reliability: The variable resistor employs a sliding connection design, resulting in a simple, robust, and durable structure. Changing the resistance value through physical sliding reduces the complexity of electronic components and potential points of failure. Compared to traditional electronic sensors or complex hydraulic systems, this mechanical-electrical hybrid design offers greater reliability, maintains stable operation even in harsh environments, and reduces maintenance costs.

[0038] 3. High adaptability: The sliding design of the variable resistor can adapt to different amplitudes of axle displacement, making it suitable for various complex road conditions and different types of vehicles. Whether on city roads, highways, or rugged mountain roads, the appropriate magnetic levitation force can be achieved by adjusting the resistance. This wide adaptability allows the device to meet diverse application scenarios, effectively improving comfort and handling from ordinary family cars to professional off-road vehicles.

[0039] The first magnet assembly 4 is an electromagnet; the second magnet assembly 5 is a cylindrical permanent magnet or an electromagnet; the electromagnetic coil 6 includes several independent sub-coils; the variable resistor 9 is provided with several contacts, and each contact corresponds to and is linked with the switch of the sub-coil.

[0040] The first magnet assembly employs an electromagnet design, allowing for adjustment of the magnetic strength by regulating the current, thereby controlling the magnitude of the magnetic levitation force. This electromagnet design enables the system to flexibly adapt to different road conditions and driving conditions. The second magnet assembly offers a variety of options, using either a cylindrical permanent magnet or an electromagnet. Permanent magnets provide stable magnetism, while electromagnets can adjust the magnetism as needed, increasing the system's flexibility and adaptability.

[0041] The electromagnetic coil comprises multiple independent sub-coils, each of which can be controlled individually. This design allows the system to more precisely adjust the magnetic force to adapt to different road conditions and vehicle states.

[0042] The variable resistor has multiple contacts, each corresponding to and linked to the switch of a sub-coil. This design allows the system to precisely control the on / off state of each sub-coil based on the relative displacement between the axle and the frame, thereby achieving fine adjustment of the magnetic force.

[0043] The combined design of the first and second magnet components allows the system to still provide a certain magnetic levitation force through the permanent magnets in the event of an electromagnetic coil failure, thereby increasing the redundancy and reliability of the system.

[0044] This structure combines the advantages of electromagnets and permanent magnets, achieving precise control and flexible adjustment of magnetic levitation force through the linkage of multiple independent sub-coils and variable resistor contacts, while improving the reliability and adaptability of the system.

[0045] like Figure 1 As shown, the conduit 7 is an electromagnet conduit used to guide the axial movement of the second magnet assembly 5; when the electromagnetic coil 6 is energized, it generates like magnetic poles with the second magnet assembly 5, forming a repulsive force to achieve magnetic levitation. Figure 2 As shown, the conduit is a permanent magnet conduit made of a high-permeability material. This high-permeability material effectively guides and concentrates magnetic field lines, enhancing the magnetic field strength. This design ensures that the repulsive force generated between the electromagnetic coil and the second magnet assembly is more concentrated and stronger after the electromagnetic coil is energized, thus achieving a more stable magnetic levitation effect. The use of high-permeability material reduces the dispersion and loss of magnetic force, improving the overall efficiency of the system.

[0046] The helical spring 8 provides mechanical support when magnetic levitation fails and works in conjunction with magnetic force to adjust the height of the frame 1.

[0047] When the axle 2 moves downward, the variable resistor 9 increases the current, causing the second magnet assembly 5 to extend and maintain the height of the frame 1; when the axle 2 moves upward, the variable resistor 9 decreases the current, and the second magnet assembly 5 returns to its original position under the action of magnetic force and helical spring 8.

[0048] The present invention also relates to an impact protection method based on the aforementioned automotive suspension device utilizing magnetic levitation, comprising the following steps:

[0049] S1. Normal magnetic levitation maintenance: The controller 10 inputs a reference current to the electromagnetic coil 6 through the variable resistor 9, so that the second magnet assembly 5 and the electromagnetic coil 6 form a repulsive force between the same magnetic poles; the repulsive force is balanced with the elastic force of the helical spring 8, maintaining the initial distance between the frame 1 and the axle 2, and avoiding mechanical hard contact.

[0050] S2. Road surface depression response: When the wheel drives into the pothole, causing the axle 2 to move down, the axle 2 drives the lower resistor 92 of the variable resistor 9 to move down; the lower resistor 92 and the upper resistor 91 slide relative to each other, reducing the resistance value, thereby increasing the current output by the controller 10 to the electromagnetic coil 6.

[0051] After the current is enhanced: the magnetic pole on the lower end face of the first magnet assembly 4 is strengthened to be an N pole, which increases the repulsive force with the N pole on the upper end face of the second magnet assembly 5; the multi-segment sub-coils of the electromagnetic coil 6 are energized sequentially according to the sliding contact sequence, generating an enhanced repulsive magnetic field in the axial segment of the second magnet assembly 5; the increased magnetic repulsive force pushes the second magnet assembly 5 to extend along the axial direction of the guide tube 7, which counteracts the downward displacement of the axle 2 and keeps the frame 1 highly stable;

[0052] S3. Road bump response: When the wheel drives out of a pothole or encounters a bump, causing the axle 2 to move upward, the lower resistor 92 of the variable resistor 9 moves upward; the lower resistor 92 slides relative to the upper resistor 91, increasing the resistance value, and the controller 10 reduces the output current; after the current weakens: the magnetic repulsion decreases, and the helical spring 8 releases the compressive potential energy; under the combined action of the restoring force of the helical spring and the residual magnetic repulsion, the second magnet assembly 5 contracts and resets along the axial direction of the guide tube 7; the frame 1 rises smoothly to avoid rigid impact;

[0053] S4. Failure protection mechanism: In case of power failure or malfunction, the coil spring 8 independently supports the relative displacement of the frame 1 and the axle 2; the deformation of the coil spring absorbs the impact of the road surface and prevents the frame and axle from colliding directly.

[0054] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A car suspension device utilizing magnetic levitation, characterized in that, The utility model relates to a kind of automobile suspension device using magnetic levitation, including frame (1), axle (2), suspension tray, first magnet assembly (4), second magnet assembly (5), electromagnetic coil (6), conduit (7), spiral spring (8), variable resistor (9) and controller (10);The suspension tray is fixed on axle (2);The lower end of second magnet assembly (5) is hinged with suspension tray, and upper end is inserted into conduit (7);The upper end of conduit (7) is fixedly connected with first magnet assembly (4), and first magnet assembly (4) is fixed on frame (1);Electromagnetic coil (6) is arranged around the outside of conduit (7), and is sealed and fixed in the frame (1) by dust cover;Spiral spring (8) is sleeved outside electromagnetic coil (6), and both ends of the spiral spring (8) are supported on frame (1) and axle (2) respectively;Variable resistor (9) is located in one side of spiral spring (8), and the upper end of variable resistor (8) is mounted on the frame (1), and the lower end is fixed on axle (2);Controller (10) is electrically connected with variable resistor (9), electromagnetic coil (6) and automobile storage battery respectively;The controller (10) adjusts the current intensity of input electromagnetic coil (6) by variable resistor (9), and controls the size of magnetic force.

2. The automobile suspension device using magnetic levitation according to claim 1, characterized by The variable resistor (9) includes upper resistance part (91) and lower resistance part (92) that are slidably connected with each other, the upper resistance part (91) is fixed on the frame (1), and the lower resistance part (92) is fixed on the axle (2).

3. The automobile suspension device using magnetic levitation according to claim 1 or 2, characterized by The first magnet assembly (4) is an electromagnet, and the second magnet assembly (5) is a cylindrical permanent magnet or an electromagnet.

4. The automobile suspension device using magnetic levitation according to claim 1, characterized by The electromagnetic coil (6) includes a plurality of independent sub-coils, and the variable resistor (9) is provided with a plurality of contacts, each contact is correspondingly linked with a switch of a sub-coil (61).

5. The automobile suspension device using magnetic levitation according to claim 3, characterized by The contacts of the variable resistor (9) slide with the relative displacement of the axle (2) and the frame (1), and sequentially turn on and off the circuits of the corresponding sub-coils.

6. The automobile suspension device using magnetic levitation according to claim 1, characterized by The conduit (7) is made of high-permeability material and is used for guiding the axial movement of the second magnet assembly (5), and the electromagnetic coil (6) generates the same magnetic pole as the second magnet assembly (5) after being energized, so as to form repulsion force and realize magnetic levitation.

7. The automobile suspension device using magnetic levitation according to claim 6, wherein: The spiral spring (8) provides mechanical support when the magnetic levitation fails, and cooperates with the magnetic force to adjust the height of the frame (1).

8. The automobile suspension device using magnetic levitation according to claim 1, wherein: When the axle (2) moves downward, the variable resistor (9) increases the current to elongate the second magnet assembly (5) and maintain the height of the frame (1), and when the axle (2) moves upward, the variable resistor (9) reduces the current, and the second magnet assembly (5) is reset under the action of the magnetic force and the spiral spring (8).

9. A shock absorbing method for a vehicle suspension device using magnetic levitation according to any one of claims 1 to 8, characterized by The method comprises the following steps: S1. Normal magnetic levitation maintenance: The controller (10) inputs a reference current to the electromagnetic coil (6) through the variable resistor (9), so that the second magnet assembly (5) and the electromagnetic coil (6) form a repulsive force between the same magnetic poles; the repulsive force is balanced with the elastic force of the helical spring (8) to maintain the initial distance between the frame (1) and the axle (2) and avoid mechanical hard contact; S2. Road surface depression response: When the wheel drives into the pothole, causing the axle (2) to move down, the axle (2) drives the lower resistor (92) of the variable resistor (9) to move down; the lower resistor (92) and the upper resistor (91) slide relative to each other, reducing the resistance value, so that the current output by the controller (10) to the electromagnetic coil (6) is increased. After the current is enhanced: the magnetic pole on the lower end face of the first magnet assembly (4) is strengthened to be the N pole, and the repulsive force between it and the N pole on the upper end face of the second magnet assembly (5) increases; the multi-segment sub-coils of the electromagnetic coil (6) are energized in sequence according to the sliding contact sequence, and the enhanced repulsive magnetic field is generated in the axial segment of the second magnet assembly (5); the increased magnetic repulsive force pushes the second magnet assembly (5) to extend along the axial direction of the guide tube (7), which counteracts the downward displacement of the axle (2) and keeps the frame (1) highly stable; S3. Road bump response: When the wheel drives out of a pothole or encounters a bump, causing the axle (2) to move upward, the lower resistor (92) of the variable resistor (9) moves upward; the lower resistor (92) and the upper resistor (91) slide relative to each other to increase the resistance value, and the controller (10) reduces the output current; after the current weakens, the magnetic repulsion decreases, and the helical spring (8) releases the compression potential energy; under the combined action of the restoring force of the helical spring and the residual magnetic repulsion, the second magnet assembly (5) contracts and resets along the axial direction of the guide tube (7); the frame (1) rises smoothly, basically maintaining the original height, avoiding rigid impact; S4. Failure protection mechanism: In case of power failure or malfunction, the helical spring (8) independently supports the relative displacement of the frame (1) and the axle (2); the deformation of the helical spring absorbs the impact of the road surface and prevents the frame and the axle from colliding directly.

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