Shock absorber and vehicle

Abstract

The utility model discloses a shock absorber and a vehicle, and the shock absorber comprises a first cylinder body, a second cylinder body and a third cylinder body, part of the connecting rod assembly is arranged in the first medium cavity; the first magnetic assembly is arranged in the first medium cavity, and the first magnetic assembly is arranged on part of the connecting rod assembly in a sleeving mode; the second magnetic assembly is arranged outside the first medium cavity, and the first cylinder body is sleeved with the second magnetic assembly; wherein the peripheral lengths of the adjacent sections of the first magnetic assembly in the moving direction of the connecting rod assembly are different, and / or the peripheral lengths of the adjacent sections of the second magnetic assembly in the moving direction of the connecting rod assembly are different. According to the shock absorber, the rigidity of the shock absorber can achieve non-linear change, and the buffering and shock absorbing effects of the shock absorber are further improved.

Description

Technical Field

[0001] The present application relates to the field of vibration reduction technology, and in particular to a shock absorber and a vehicle. Background Art

[0002] As an important elastic component of a vehicle, the shock absorber mainly provides damping for the vehicle suspension system and improves the ride comfort of the vehicle. When a car is driving on a bumpy road or a road with potholes, the wheels and the body move relative to each other, forming an oscillation system. The shock absorber is used to connect the wheels and the body, and suppresses and attenuates vibrations by compressing or stretching the shock absorber force and speed characteristics.

[0003] In the related art, in order to achieve variable stiffness of the shock absorber, magnetic components are respectively mounted on the cylinder body and piston rod of the shock absorber, at least one of the two magnetic components is an excitation coil, and the two magnetic components cooperate with each other to achieve dynamic adjustment of the stiffness of the shock absorber by changing the magnetic force between the two magnetic components.

[0004] The magnetic components in the related art are mostly cylindrical, and the way of changing the magnetic force is relatively simple. Utility Model Content

[0005] The present application provides a shock absorber and a vehicle.

[0006] A technical solution adopted in the present application is to provide a shock absorber, which includes:

[0007] A first cylinder body, wherein a first medium chamber is formed in the first cylinder body;

[0008] A connecting rod assembly, a portion of which is disposed in the first medium cavity;

[0009] A first magnetic component, the first magnetic component is in the first medium cavity, and the first magnetic component is sleeved on a portion of the connecting rod component;

[0010] A second magnetic component is disposed outside the first medium cavity and sleeved on the first cylinder body;

[0011] The peripheral lengths of adjacent cross sections of the first magnetic component in the moving direction of the connecting rod assembly are different, and / or the peripheral lengths of adjacent cross sections of the second magnetic component in the moving direction of the connecting rod assembly are different.

[0012] Optionally, in the direction of movement, the outer circumference of the cross section of the first magnetic component gradually increases;

[0013] and / or,

[0014] In the moving direction, the outer circumference length of the cross section of the second magnetic component gradually decreases.

[0015] Optionally, the first magnetic component includes a first end face and a second end face, and part of the connecting rod component is disposed through the first end face and the second end face; along the direction of movement, there is a first maximum cross section between the first end face and the second end face, and in the direction from the first end face toward the first maximum cross section, the outer circumference of the cross section of the first magnetic component gradually increases, and in the direction from the first maximum cross section toward the second end face, the outer circumference of the cross section of the first magnetic component gradually decreases;

[0016] and / or,

[0017] The second magnetic component includes a third end face and a fourth end face, and the first cylinder body passes through the third end face and the fourth end face; along the direction of movement, there is a second maximum cross-section between the third end face and the fourth end face, and the outer circumferential length of the cross-section of the second magnetic component gradually increases in the direction of the third end face toward the second maximum cross-section, and the outer circumferential length of the cross-section of the second magnetic component gradually decreases in the direction of the second maximum cross-section toward the fourth end face.

[0018] Optionally, the first end surface and the second end surface have the same circumferential length;

[0019] and / or,

[0020] The third end surface and the fourth end surface have the same outer circumferential length.

[0021] Optionally, the distance from the first end surface to the first maximum cross section is the same as the distance from the second end surface to the first maximum cross section;

[0022] and / or,

[0023] The distance between the third end surface and the second largest cross section is the same as the distance between the fourth end surface and the second largest cross section.

[0024] Optionally, the first magnetic component includes a first end face and a second end face, and part of the connecting rod component is disposed through the first end face and the second end face; along the direction of movement, there is a first minimum cross section between the first end face and the second end face, and in the direction from the first end face toward the first minimum cross section, the outer circumference of the cross section of the first magnetic component gradually decreases, and in the direction from the first minimum cross section toward the second end face, the outer circumference of the cross section of the first magnetic component gradually increases;

[0025] and / or,

[0026] The second magnetic component includes a third end face and a fourth end face, and the first cylinder body passes through the third end face and the fourth end face; along the direction of movement, there is a second minimum cross-section between the third end face and the fourth end face, and the outer circumferential length of the cross-section of the second magnetic component gradually decreases in the direction of the third end face toward the second minimum cross-section, and the outer circumferential length of the cross-section of the second magnetic component gradually increases in the direction of the second minimum cross-section toward the fourth end face.

[0027] Optionally, the first end surface and the second end surface have the same circumferential length;

[0028] and / or,

[0029] The third end surface and the fourth end surface have the same outer circumferential length.

[0030] Optionally, the shock absorber further comprises:

[0031] The second cylinder body has a second medium cavity therein, the first cylinder body is located in the second medium cavity, and the second magnetic component is arranged in the second medium cavity.

[0032] Optionally, the first magnetic component is a permanent magnet or an electromagnet;

[0033] The second magnetic component is a permanent magnet or an electromagnet.

[0034] Another technical solution adopted by the present application is to provide a vehicle, the vehicle comprising a body, wheels and a shock absorber as described above, wherein the shock absorber is connected between the body and the wheels.

[0035] The beneficial effect of the present application is: by changing the peripheral length of adjacent cross-sections of the first magnetic component in the direction of movement, and / or changing the peripheral length of adjacent interfaces of the second magnetic component in the direction of movement, when the connecting rod assembly moves, the magnetic force between the first magnetic component and the second magnetic component produces a nonlinear change, so that the stiffness of the shock absorber changes nonlinearly, further improving the buffering and vibration reduction effects of the shock absorber.

[0036] Furthermore, a vehicle using the shock absorber provided by the present application can improve the vehicle's handling stability and comfort to the greatest extent under different vehicle operating conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0038] Figure 1 is a cross-sectional schematic diagram of an embodiment of a shock absorber provided by the present application;

[0039] Figure 2 Schematic diagram of the relationship between the electromagnetic force and height difference between coaxial parallel current loops;

[0040] Figure 3 is a stiffness variation curve of an embodiment of a shock absorber provided by the present application;

[0041] Figure 4ais a structural schematic diagram of an embodiment of a first magnetic component provided by the present application;

[0042] Figure 4b is a structural schematic diagram of another embodiment of the first magnetic component provided by the present application;

[0043] Figure 5a is a structural schematic diagram of an embodiment of a second magnetic component provided by the present application;

[0044] Figure 5b is a structural schematic diagram of another embodiment of the second magnetic component provided by the present application;

[0045] Figure 6 is a cross-sectional schematic diagram of another embodiment of the shock absorber provided by the present application;

[0046] Figure 7 It is a schematic diagram of an embodiment of a vehicle function development matrix provided by the present application;

[0047] Figure 8 It is a schematic diagram of an embodiment of a vehicle control architecture provided by the present application. DETAILED DESCRIPTION

[0048] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0049] The terms "first", "second", etc. in this application are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system or device that includes a series of steps or units is not limited to the listed steps or units, but optionally includes steps or units that are not listed, or optionally includes other steps or units inherent to these processes, methods or devices.

[0050] In the related art, during the extension and compression process of the shock absorber, the oil in the shock absorber flows through the damping hole in the piston to provide damping force, and the stiffness of the shock absorber depends on the internal structure of the shock absorber, such as the valve system, cylinder size, etc. Once the shock absorber structure is determined, the stiffness of the shock absorber is determined, and the stiffness of the shock absorber cannot be controlled in real time.

[0051] like Figure 1 As shown, the shock absorber 10 includes a first cylinder block 1 , a connecting rod assembly 2 , a first magnetic assembly 3 and a second magnetic assembly 4 .

[0052] The first cylinder body 1 has a first medium chamber 1a in which a buffer medium, such as hydraulic oil, is filled. The connecting rod assembly 2 includes a partial connecting rod assembly 21, which is disposed in the first medium chamber 1a.

[0053] Part of the connecting rod assembly 21 moves in the first medium chamber 1 a.

[0054] In some possible embodiments, the partial connecting rod assembly 21 includes a first rod body 211 and an end 212, both of which are located in the first medium cavity 1a. The end 212 has a through damping hole (not shown), which can be along the length direction of the first rod body 211 and penetrate the end surfaces of the end 212 on both sides, and the number of the damping holes can be one or more.

[0055] Further, the end portion 212 reciprocates along the axial direction of the part of the connecting rod assembly 21, and the movement process of the end portion 212 in the first medium cavity 1a may include the advance stroke of the end portion 212 and the return stroke of the end portion 212. When the end portion 212 moves in the first medium cavity 1a, the end portion 212 may separate the first medium cavity 1a into a first cavity and a second cavity located on both sides of the axial direction of the end portion 212, the first cavity may be located on the return stroke side of the end portion 212, and the second cavity may be located on the advance stroke side of the end portion 212, and the first cavity and the second cavity may be connected through a damping hole; when the end portion 212 advances, the volume of the first cavity gradually increases and the volume of the second cavity gradually decreases, and when the end portion 212 returns, the volume of the first cavity gradually decreases and the volume of the second cavity gradually increases.

[0056] For example, when the buffer device is subjected to a compressive load, the movement of the connecting rod assembly 2 is a forward movement to achieve load buffering, and when the buffer device is subjected to an unloading load (the direction of the unloading load is opposite to the direction of the compressive load), the connecting rod assembly 2 performs a return movement to achieve load buffering. It can be understood that when the shock absorber 10 is in use, the first medium cavity 1a is filled with a buffer medium, and the buffer medium can buffer the impact energy received by the connecting rod assembly 2, playing a buffering and vibration reduction role of the shock absorber 10.

[0057] For another example, when the connecting rod assembly 2 returns (the shock absorber 10 is stretched), the end portion 212 may move from the forward side to the return side (for example, Figure 1The space of the first cavity gradually decreases and the space of the second cavity gradually increases, and a part of the buffer medium in the first cavity can flow to the second cavity through the damping hole to offset the impact energy received by the connecting rod assembly 2, thereby playing the role of buffering and absorbing energy. In the above process, a part of the elastic potential energy stored in the buffer medium can be converted into friction between the buffer medium and the wall of the damping hole and the movement between the molecules inside the buffer medium and consumed, and most of it is used to offset the impact energy received by the connecting rod assembly 2, thereby playing the role of buffering and vibration reduction.

[0058] Furthermore, the first magnetic component 3 is in the first medium cavity 1a, and the first magnetic component 3 is sleeved on a part of the connecting rod component 21. The second magnetic component 4 is arranged outside the first medium cavity 1a, and the second magnetic component 4 is sleeved on the first cylinder body 1.

[0059] Optionally, the first magnetic component 3 can be directly mounted on a portion of the connecting rod component 21 , or can be indirectly mounted on a portion of the connecting rod component 21 through other components.

[0060] Optionally, the second magnetic component 4 can be directly sleeved on the first cylinder body 1, or can be indirectly sleeved on the first cylinder body 1 through other components. Exemplarily, the second magnetic component 4 can be fixedly mounted on the outer peripheral wall of the first cylinder body 1.

[0061] The outer circumference lengths of adjacent cross sections of the first magnetic component 3 in the moving direction of the connecting rod component 2 are different. And / or, the outer circumference lengths of adjacent cross sections of the second magnetic component 4 in the moving direction of the connecting rod component 2 are different. In other words, the first magnetic component 3 and / or the second magnetic component 4 are not strictly cylindrical.

[0062] In the related art, the first magnetic component and the second magnetic component are cylindrical, respectively, and at least one of the first magnetic component and the second magnetic component is an excitation coil. The first magnetic component and the second magnetic component cooperate with each other to generate an attractive force or a repulsive force. Furthermore, the related art achieves a change in the magnitude and / or direction of the magnetic force between the first magnetic component and the second magnetic component by changing the current magnitude and / or current direction of the first magnetic component and / or the second magnetic component as the excitation coil, so as to achieve dynamic adjustment of the stiffness of the shock absorber. However, when the current magnitude and current direction of the first magnetic component and / or the second magnetic component are unchanged, the attractive force or repulsive force between the first magnetic component and the second magnetic component will remain constant, that is, the stiffness of the shock absorber remains constant.

[0063] In an ideal case, the first magnetic component and the second magnetic component are regarded as two coaxial parallel circular rings, wherein the radius of the first circular ring corresponding to the first magnetic component is a, the radius of the second circular ring corresponding to the second magnetic component is b, and the height difference between the first circular ring and the second circular ring is h, then the electromagnetic force between the first circular ring and the second circular ring satisfies the following formula:

[0064]

[0065] K ′2 =1-k 2 Substituting into the above formula, we get the following formula:

[0066]

[0067] Among them, μ0 is the vacuum magnetic permeability, which needs to be corrected in actual situations, I1 is the current passing through the first ring, I2 is the current passing through the second ring, K(k) is the complete elliptic integral of the first kind, E(k) is the complete elliptic integral of the second kind, and k is a constant between 0 and 1.

[0068] See also Figure 2 As can be seen from the figure, the electromagnetic force F increases first and then decreases with the increase of the height difference h, and there is an extreme value. The extreme value reaches the maximum when the radius values ​​of the first ring and the second ring are equal. As the difference between the radius of the first ring and the radius of the second ring increases, the extreme value gradually decreases, and the position where the extreme value appears moves in the direction of the height difference. It can be seen that, without changing the current of the first magnetic component 3 and / or the second magnetic component 4 as the excitation coil (or electromagnet), the (electro) magnetic force between the first magnetic component 3 and the second magnetic component 4 can be changed by changing the outer circumference of the first magnetic component 3 and / or the second magnetic component 4, thereby realizing the dynamic stiffness adjustment of the shock absorber 10.

[0069] like Figure 3 As shown, Figure 3 It is a stiffness variation curve of an embodiment of a shock absorber provided in the present application.

[0070] The shock absorber provided by the related art has a constant stiffness K when the first magnetic component and the second magnetic component are not powered on. The shock absorber 10 provided by the present application has different peripheral lengths of adjacent cross sections of the first magnetic component 3 and / or different peripheral lengths of adjacent cross sections of the second magnetic component 4 in the movement direction of the connecting rod component 2, so that the magnitude of the magnetic force between the first magnetic component 3 and the second magnetic component 4 is variable when no power is supplied. Furthermore, the stiffness K' of the shock absorber 10 satisfies the following relationship:

[0071] K'=K+K x

[0072] Among them, K x It is a combination of one or more of K1, K2, K3, and K4.

[0073] Further, on the basis of the above, the magnitude of the electromagnetic force between the first magnetic component 3 and the second magnetic component 4 can be further changed by changing the current magnitude of the first magnetic component 3 and / or the second magnetic component 4 as the excitation coil (or electromagnet), thereby realizing the dynamic stiffness adjustment of the shock absorber 10. Similarly, the direction of the magnetic force between the first magnetic component 3 and the second magnetic component 4 can be changed by changing the current direction of the first magnetic component 3 or the second magnetic component 4 as the excitation coil (or electromagnet).

[0074] Please review Figure 1 .

[0075] In some embodiments, the first magnetic component 3 is a permanent magnet or an electromagnet. In some possible embodiments, the first magnetic component 3 is an excitation coil.

[0076] In some embodiments, the second magnetic component 4 is a permanent magnet or an electromagnet. In some possible embodiments, the second magnetic component 4 is an excitation coil.

[0077] In some application scenarios, when both the first magnetic component 3 and the second magnetic component 4 are permanent magnets, the magnitude of the magnetic force between the first magnetic component 3 and the second magnetic component 4 is related to the size (e.g., cross-sectional area) of the first magnetic component 3 and the second magnetic component 4, and the axial spacing between the first magnetic component 3 and the second magnetic component 4. Specifically, the smaller the relative distance between the outer periphery of the first magnetic component 3 and the inner periphery of the second magnetic component 4, the greater the magnetic force between the first magnetic component 3 and the second magnetic component 4 along the movement direction of the connecting rod assembly 2.

[0078] Based on this, the axial spacing between the first magnetic component 3 and the second magnetic component 4 can be changed by changing the outer circumferential length of the first magnetic component 3 and / or the second magnetic component 4 to change the magnitude of the magnetic force between the first magnetic component 3 and the second magnetic component 4, thereby achieving dynamic stiffness adjustment of the shock absorber 10.

[0079] In some embodiments, the outer circumference of the cross section of the first magnetic component 3 gradually increases in the direction of movement of the connecting rod assembly 2. Since the movement direction of the connecting rod assembly 2 includes downward movement and upward movement, the first magnetic component 3 can be in the shape of a truncated cone with a wide top and a narrow bottom, or in the shape of a truncated cone with a wide top and a narrow bottom.

[0080] In some embodiments, in the moving direction of the connecting rod assembly 2, the outer periphery of the cross section of the first magnetic assembly 3 is circular.

[0081] In some possible embodiments, the difference between the outer circumference and the inner circumference of any cross section of the first magnetic component 3 in the moving direction of the connecting rod assembly 2 is a fixed constant. More specifically, in the moving direction of the connecting rod assembly 2, the radial thickness of the first magnetic component 3 remains unchanged.

[0082] In some embodiments, the outer circumference of the cross section of the second magnetic component 4 gradually decreases along the movement direction of the connecting rod assembly 2. Since the movement direction of the connecting rod assembly 2 includes downward movement and upward movement, the second magnetic component 4 can be in the shape of a truncated cone with a wide top and a narrow bottom, or in the shape of a truncated cone with a wide top and a narrow bottom.

[0083] In some embodiments, in the moving direction of the connecting rod assembly 2 , the outer periphery of the cross section of the second magnetic assembly 4 is circular.

[0084] In some possible embodiments, the difference between the outer circumference and the inner circumference of any cross section of the second magnetic component 4 is a fixed constant in the moving direction of the connecting rod assembly 2. More specifically, in the moving direction of the connecting rod assembly 2, the radial thickness of the second magnetic component 4 remains unchanged.

[0085] Optionally, the first magnetic component 3 includes a first end surface 3a and a second end surface 3b, and part of the connecting rod component 21 is disposed through the first end surface 3a and the second end surface 3b.

[0086] like Figure 4a As shown, in some embodiments, along the direction of movement of the connecting rod assembly 2, there is a first maximum cross-section between the first end face 3a and the second end face 3b, wherein the outer circumference of the cross-section of the first magnetic component 3 gradually increases in the direction of the first end face 3a toward the first maximum cross-section, and the outer circumference of the cross-section of the first magnetic component 3 gradually decreases in the direction of the first maximum cross-section toward the second end face 3b. That is, the first magnetic component 3 may be spindle-shaped. In some possible embodiments, the outer circumference of the first end face 3a is the same as that of the second end face 3b. Of course, in some possible embodiments, the outer circumference of the first end face 3a may be different from the outer circumference of the second end face 3b.

[0087] In some embodiments, a distance h1 from the first end surface 3a to the first maximum cross section is equal to a distance h2 from the second end surface 3b to the first maximum cross section, that is, h1=h2.

[0088] like Figure 4bAs shown, in some embodiments, along the movement direction of the connecting rod assembly 2, there is a first minimum cross section between the first end face 3a and the second end face 3b, and the outer circumference of the cross section of the first magnetic component 3 gradually decreases in the direction of the first end face 3a toward the first minimum cross section, and the outer circumference of the cross section of the first magnetic component 3 gradually increases in the direction of the first minimum cross section toward the second end face 3b. That is, the first magnetic component 3 is dumbbell-shaped. In some possible embodiments, the outer circumference of the first end face 3a and the second end face 3b are the same. Of course, in some possible embodiments, the outer circumference of the first end face 3a can be different from the outer circumference of the second end face 3b.

[0089] Optionally, the second magnetic component 4 includes a third end surface 4a and a fourth end surface 4b, and the first cylinder body 1 penetrates the third end surface 4a and the fourth end surface 4b.

[0090] like Figure 5a As shown, in some embodiments, along the direction of movement of the connecting rod assembly 2, there is a second maximum cross section between the third end face 4a and the fourth end face 4b, and the peripheral length of the cross section of the second magnetic component 4 gradually increases in the direction of the third end face 4a toward the second maximum cross section, and the peripheral length of the cross section of the second magnetic component 4 gradually decreases in the direction of the second maximum cross section toward the fourth end face 4b. That is, the second magnetic component 4 can be spindle-shaped. In some possible embodiments, the peripheral lengths of the third end face 4a and the fourth end face 4b are the same. Of course, in some possible embodiments, the peripheral length of the third end face 4a can be different from the peripheral length of the fourth end face 4b.

[0091] In some embodiments, a distance h3 from the third end surface 4a to the second largest cross section is equal to a distance h4 from the fourth end surface 4b to the second largest cross section, that is, h3=h4.

[0092] like Figure 5b As shown, in some embodiments, along the direction of movement of the connecting rod assembly 2, there is a second minimum cross section between the third end face 4a and the fourth end face 4b, and the peripheral length of the cross section of the second magnetic component 4 gradually decreases in the direction of the third end face 4a toward the second minimum cross section, and the peripheral length of the cross section of the second magnetic component 4 gradually increases in the direction of the second minimum cross section toward the fourth end face 4b. That is, the second magnetic component 4 is dumbbell-shaped. In some possible embodiments, the peripheral lengths of the third end face 4a and the fourth end face 4b are the same. Of course, in some possible embodiments, the peripheral length of the third end face 4a may be different from the peripheral length of the fourth end face 4b.

[0093] In some possible application scenarios, first magnetic components 3 and / or second magnetic components 4 with different shapes can be used according to actual needs to make the (electro)magnetic force applied to the connecting rod assembly 2 at different stroke positions variable. For example, the magnetic force applied to the connecting rod assembly 2 at a certain stroke position is small. When the connecting rod assembly 2 moves forward or back, the radial distance between the first magnetic component 3 and the second magnetic component 4 is shortened, so that the electromagnetic force applied to the connecting rod assembly 2 increases, thereby realizing dynamic adjustment of the stiffness of the shock absorber 10 and improving the vibration reduction and buffering effects of the shock absorber 10.

[0094] The above scheme changes the circumferential length of adjacent cross-sections of the first magnetic component in the direction of movement, and / or changes the circumferential length of adjacent interfaces of the second magnetic component in the direction of movement. When the connecting rod assembly moves, the magnetic force between the first magnetic component and the second magnetic component undergoes a nonlinear change, so that the stiffness of the shock absorber changes nonlinearly, further improving the buffering and vibration reduction effects of the shock absorber.

[0095] See also Figure 6 , Figure 6 It is a cross-sectional schematic diagram of another embodiment of the shock absorber provided in the present application.

[0096] like Figure 6 As shown, the shock absorber 20 specifically includes a first cylinder body 201, a connecting rod assembly 202, a first magnetic assembly 203, a second magnetic assembly 204, a second cylinder body 205 and a bottom valve 206, wherein the connecting rod assembly 202 further includes a rod body 207, a first spring tray 208, a damping spring 209, and a second spring tray 210.

[0097] The first cylinder body 201 has a first medium chamber 201 a , and the bottom valve 206 is disposed on the first cylinder body 201 and the second cylinder body 205 .

[0098] The second cylinder 205 has a second medium cavity 205a, the first cylinder 201 is located in the second medium cavity 205a, and the second magnetic component 204 is disposed in the second medium cavity 205a. Furthermore, the second medium cavity 205a is connected to the first medium cavity 201a through the bottom valve 206. Thus, the shock absorber 20 can construct a multi-tube shock absorbing structure to improve the shock absorbing performance of the shock absorber 20. The buffer medium in the second medium cavity 205a can compensate the first medium cavity 201a to a certain extent. At the same time, the second cylinder 205 can protect the second magnetic component 204 to a certain extent, further improving the reliability of the shock absorber 20.

[0099] The rod body 207 is divided into a first rod body 2071 and a second rod body 2072, wherein the first rod body 2071 is inside the first medium cavity 201a, and the second rod body 2072 is outside the first medium cavity 201a, and the second rod body 2072 is also outside the second medium cavity 205a. The movement direction of the connecting rod assembly 202 includes a first direction and a second direction, wherein the first direction is the movement direction of the connecting rod assembly during the forward movement, and the second direction is the movement direction of the connecting rod assembly during the return movement. Along the first direction (from top to bottom), the second rod body 2072 is sequentially sleeved with a first spring tray 208, a damping spring 209, and a second spring tray 210. Further, along the first direction, the damping spring includes a first end 209a and a second end 209b, wherein the first end 209a is connected to the first spring tray 208, and the second end 209b is connected to the second spring tray 210. Optionally, the first spring tray 208 and the second spring tray 210 may be made of impact-resistant materials. By providing the second spring tray 210 , it is possible to avoid the possibility that the damping spring 209 directly collides 205 with the first cylinder body 201 or the second cylinder body when the shock absorber is subjected to a large impact.

[0100] In some possible embodiments, the first spring tray 208 may be fixed to the vehicle body.

[0101] Optionally, the damping spring 209 may be a combination of one or more of a compression spring, an air spring, and a tension spring, which is not limited here.

[0102] The present application also provides a vehicle, including a body, wheels, and a shock absorber 10 or 20 as described above, wherein the shock absorber is connected between the body and the wheel, for example, the first cylinder body is connected to the body, and the connecting rod assembly is connected to the wheel, or the first cylinder body is connected to the wheel, and the connecting rod assembly is connected to the body.

[0103] The vehicle provided in the present application may be a car, or a bicycle, a motorcycle, or other vehicles that can be equipped with shock absorbers.

[0104] The above scheme changes the circumferential length of adjacent cross-sections of the first magnetic component in the direction of movement, and / or changes the circumferential length of adjacent interfaces of the second magnetic component in the direction of movement. When the connecting rod assembly moves, the magnetic force between the first magnetic component and the second magnetic component undergoes a nonlinear change, so that the stiffness of the shock absorber changes nonlinearly, further improving the buffering and vibration reduction effects of the shock absorber.

[0105] Furthermore, for a vehicle using the shock absorber provided by the present application, since the stiffness of the shock absorber can be dynamically adjusted, the vehicle's handling stability and comfort can be improved to the greatest extent under different vehicle operating conditions.

[0106] See also Figure 7 and Figure 8 , Figure 7 The vehicle status information module in can be Figure 8 The chassis domain control itself is integrated in the vehicle state information module, wherein the vehicle state information module is used to obtain one or more of the wheel speed signal, the steering wheel angle signal, the vehicle angle signal, the yaw angular velocity signal, the pitch angular velocity signal, the roll angular velocity signal, the left collision signal, and the right collision signal.

[0107] Among them, the judgment and decision-making modules include side collision judgment module, smoothness and operability balance judgment module, off-road mode and passability improvement module, vehicle new function development module, etc.

[0108] In some application scenarios, the side collision determination module adjusts the stiffness of the single-sided shock absorber according to the vehicle speed signal and the VCU side collision warning signal to change the height of the vehicle and improve the safety of the vehicle in side collisions.

[0109] In some application scenarios, the smoothness and handling balance judgment module changes the stiffness of the shock absorber in a direction according to the braking signal, vehicle speed signal, and vehicle pitch angle signal to enhance the vehicle's anti-nodding ability during emergency braking.

[0110] In some application scenarios, the smoothness and handling balance judgment module changes the stiffness of the shock absorber in a direction according to the accelerator pedal signal, vehicle speed signal and vehicle body pitch angle signal, thereby enhancing the ability to resist pitch during sudden acceleration.

[0111] In some application scenarios, the smoothness and handling balance judgment module changes the spring stiffness and the equivalent cornering stiffness in a direction according to the steering signal, vehicle speed signal, and body roll angle signal.

[0112] In some application scenarios, the smoothness and handling balance judgment module changes the shock absorber stiffness in real time and directionally according to the steering signal, vehicle speed signal, body roll angle signal, and yaw angular velocity signal, dynamically distributes the front and rear axle load transfer, and controls the body stability.

[0113] In some application scenarios, the off-road mode and passability improvement module increase the spring stiffness at the slipping wheels based on vehicle speed signals, body roll angle signals, etc., to increase the contact area and pressure between the wheels and the ground to improve the wheel's grip.

[0114] In some application scenarios, the off-road mode and passability enhancement module raise the vehicle body height, increase the ground clearance and improve the vehicle's passability according to the vehicle domain control instructions.

[0115] In the description of the present application, it should be understood that the terms "center", "length", "width", "thickness", "up", "down", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, unless otherwise specified, "multiple" means two or more.

[0116] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0117] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0118] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

Claims

1. A shock absorber, characterized in that: The shock absorber comprises: a first cylinder body, wherein the first cylinder body has a first medium chamber; A connecting rod assembly, a portion of which is disposed in the first medium cavity; A first magnetic component, wherein the first magnetic component is in the first medium cavity and is sleeved on the part of the connecting rod component; A second magnetic component, the second magnetic component is arranged outside the first medium cavity, and the second magnetic component is sleeved on the first cylinder body; Wherein, adjacent cross sections of the first magnetic component in the moving direction of the connecting rod assembly have different peripheral lengths, and / or adjacent cross sections of the second magnetic component in the moving direction of the connecting rod assembly have different peripheral lengths.

2. The shock absorber according to claim 1, characterized in that: In the moving direction, the outer circumference length of the cross section of the first magnetic component gradually increases; and / or, In the moving direction, the outer circumference length of the cross section of the second magnetic component gradually decreases.

3. The shock absorber according to claim 1, characterized in that: The first magnetic component comprises a first end face and a second end face, and the part of the connecting rod component is arranged through the first end face and the second end face; along the movement direction, there is a first maximum cross section between the first end face and the second end face, and the outer circumference length of the cross section of the first magnetic component gradually increases in the direction from the first end face toward the first maximum cross section, and the outer circumference length of the cross section of the first magnetic component gradually decreases in the direction from the first maximum cross section toward the second end face; and / or, The second magnetic component includes a third end face and a fourth end face, and the first cylinder body passes through the third end face and the fourth end face; along the movement direction, there is a second maximum cross-section between the third end face and the fourth end face, and the outer circumferential length of the cross-section of the second magnetic component gradually increases in the direction of the third end face toward the second maximum cross-section, and the outer circumferential length of the cross-section of the second magnetic component gradually decreases in the direction of the second maximum cross-section toward the fourth end face.

4. The shock absorber according to claim 3, characterized in that The outer circumference lengths of the first end surface and the second end surface are the same; and / or, The third end surface and the fourth end surface have the same outer circumference length.

5. The shock absorber according to claim 3, characterized in that: The distance between the first end surface and the first maximum cross section is the same as the distance between the second end surface and the first maximum cross section; and / or, The distance from the third end surface to the second largest cross section is the same as the distance from the fourth end surface to the second largest cross section.

6. The shock absorber according to claim 1, characterized in that The first magnetic component comprises a first end face and a second end face, and the part of the connecting rod component is arranged through the first end face and the second end face; along the movement direction, there is a first minimum cross section between the first end face and the second end face, and the outer circumference of the cross section of the first magnetic component gradually decreases in the direction of the first end face toward the first minimum cross section, and the outer circumference of the cross section of the first magnetic component gradually increases in the direction of the first minimum cross section toward the second end face; and / or, The second magnetic component includes a third end face and a fourth end face, and the first cylinder body passes through the third end face and the fourth end face; along the movement direction, there is a second minimum cross-section between the third end face and the fourth end face, and the outer circumferential length of the cross-section of the second magnetic component gradually decreases in the direction of the third end face toward the second minimum cross-section, and the outer circumferential length of the cross-section of the second magnetic component gradually increases in the direction of the second minimum cross-section toward the fourth end face.

7. The shock absorber according to claim 6, characterized in that The outer circumference lengths of the first end surface and the second end surface are the same; and / or, The third end surface and the fourth end surface have the same outer circumference length.

8. The shock absorber according to claim 1, characterized in that The vibration absorber further comprises: The second cylinder body has a second medium cavity therein, the first cylinder body is located in the second medium cavity, and the second magnetic component is disposed in the second medium cavity.

9. The shock absorber according to any one of claims 1 to 8, characterized in that: The first magnetic component is a permanent magnet or an electromagnet; The second magnetic component is a permanent magnet or an electromagnet.

10. A vehicle, characterized in that: The vehicle comprises a vehicle body, a wheel, and the shock absorber according to any one of claims 1 to 9, wherein the shock absorber is connected between the vehicle body and the wheel.

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