Shock absorbers and their vehicles

Abstract

This utility model relates to a shock absorber and its vehicle, comprising: a cylindrical body, a piston, and a coil; the cylindrical body is a conductor structure and has a guide cavity; the piston is located within the guide cavity and is telescopically connected to the cylindrical body, and the piston can extend and retract relative to the cylindrical body along the axial direction of the guide cavity; the coil is located within the guide cavity and connected to the piston, and the coil is used to connect to a power source. This shock absorber and its vehicle can enhance the damping force of the shock absorber when the vehicle travels on special road surfaces, thereby ensuring vehicle comfort and handling.

Description

Technical Field

[0001] This utility model belongs to the field of automotive shock absorber technology, specifically relating to a shock absorber and its vehicle. Background Technology

[0002] Shock absorbers are the core components of a car's suspension system. During the vehicle's movement, springs act as a buffer, and the elastic potential energy generated by the springs is converted into heat energy by the damping force of the shock absorber and quickly dissipated, thereby reducing vehicle vibrations and improving vehicle comfort and handling.

[0003] However, existing shock absorbers have relatively low damping force, resulting in significant vibrations when the vehicle travels on special road surfaces (such as bumpy or rough roads), leading to a decrease in vehicle comfort and handling. Utility Model Content

[0004] The purpose of this invention is to provide a shock absorber and its vehicle, which can enhance the damping force of the shock absorber when the vehicle passes through special road surfaces, so as to ensure the comfort and handling of the vehicle.

[0005] The first aspect of this utility model discloses a vibration damper, comprising: a cylindrical body, a piston, and a coil. The cylindrical body is a conductor structure and has a guide cavity. The piston is located within the guide cavity and is telescopically connected to the cylindrical body. The piston can telescopically extend and retract relative to the cylindrical body along the axial direction of the guide cavity. The coil is located within the guide cavity and is connected to the piston. The coil is used to communicate with a power source.

[0006] In an exemplary embodiment of this utility model, the piston portion is provided with a through hole; the damper further includes a lead wire portion, which is located inside the through hole, one end of the lead wire portion is connected to the coil portion, and the other end of the lead wire portion is used to connect to a power source.

[0007] In an exemplary embodiment of this utility model, the piston portion includes a piston rod and a piston body. One end of the piston rod is located outside the guide cavity, and the other end of the piston rod is located inside the guide cavity and connected to the piston body. The piston body is provided with a groove; the coil portion is located inside the groove.

[0008] In an exemplary embodiment of the present invention, the piston rod includes a main rod section and a protrusion section. The main rod section is connected to the protrusion section, and the protrusion section protrudes from the side peripheral surface of the main rod section to restrict the main rod section from sliding out of the guide cavity. The piston body is connected to the main rod section, and the piston body and the protrusion section are spaced apart.

[0009] In an exemplary embodiment of this utility model, the cylindrical body includes an inner cylindrical body and an outer cylindrical body. The inner cylindrical body is located inside the outer cylindrical body and is spaced apart from the outer cylindrical body. The inner cylindrical body has a conductor structure, and the guide cavity is located in the inner cylindrical body. The cylindrical body also includes a limiting member located inside the outer cylindrical body and connected to both the inner and outer cylindrical bodies. The main rod segment passes through the limiting member and can move axially relative to the limiting member along the guide cavity.

[0010] In an exemplary embodiment of this utility model, the piston rod further includes a magnetic component, which is disposed opposite to the limiting component along the axial direction of the guide cavity. The magnetic component is connected to the side of the protrusion segment near the limiting component. The limiting component is a magnetic structure, and the magnetic pole of the limiting component near the magnetic component is the same as the magnetic pole of the magnetic component near the limiting component.

[0011] In an exemplary embodiment of the present invention, the guide cavity includes an upper cavity and a lower cavity, the upper cavity and the lower cavity being disposed on two opposite sides of the piston body in a one-to-one correspondence along the axial direction of the guide cavity; the piston body is provided with a valve hole, the valve hole penetrating the piston body and being spaced apart from the groove, the valve hole communicating with the upper cavity and the lower cavity.

[0012] In an exemplary embodiment of the present invention, the piston portion further includes a first valve plate and a second valve plate. The first valve plate and the second valve plate are disposed on two opposite sides of the piston body in a one-to-one correspondence along the axial direction of the guide cavity. The first valve plate covers part of the valve hole, and the second valve plate covers part of the valve hole.

[0013] In an exemplary embodiment of the present invention, the shock absorber further includes oil, which is filled inside the cylindrical portion.

[0014] The second aspect of this utility model discloses a vehicle, including an air spring and the shock absorber, wherein the shock absorber is connected to the air spring.

[0015] The present invention has the following beneficial effects: In this embodiment of the invention, when the vehicle passes over a special road surface, the coil section can be connected to a power source to generate a magnetic field in the piston section. Since the cylinder section is a conductor structure, and the piston section can extend and retract relative to the cylinder section along the axial direction of the guide cavity, when the piston section extends and retracts relative to the cylinder section, the cylinder section cuts magnetic field lines and generates an induced current. According to Lenz's law, the induced current generates an electromagnetic damping force that opposes the movement of the piston section, thereby enhancing the damping force of the shock absorber to ensure the vehicle's comfort and handling.

[0016] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit the present invention. Attached Figure Description

[0017] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments conforming to the present invention and, together with the description, serve to explain the principles of the present invention. Obviously, the drawings described below are merely some embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort. The drawings herein are for illustrating the inventive concept of the present invention and are not entirely equivalent to the structure of the actual product protected by the present invention.

[0018] Figure 1 A schematic diagram of the internal structure of the vibration damper in an embodiment of this utility model is shown.

[0019] Figure 2 An embodiment of the present invention is shown. Figure 1 An enlarged structural diagram of the vibration damper at point A.

[0020] Explanation of reference numerals in the attached figures: 1. Cylinder body; 101. Guide cavity; 101a. Upper cavity; 101b. Lower cavity; 102. Mounting cavity; 103. Limiting hole; 11. Inner cylinder; 12. Outer cylinder; 13. Limiting element; 14. Bottom valve; 2. Piston body; 201. Through hole; 201a. First hole section; 201b. Second hole section; 202. Groove; 203. Valve hole; 21. Piston rod; 211. Main rod section; 212. Protrusion section; 213. Magnetic element; 22. Piston body; 23. First valve plate; 24. Second valve plate; 3. Coil body; 4. Lead wire body; x. Axial direction. Detailed Implementation

[0021] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided to make the present invention more comprehensive and complete, and to fully convey the concept of the exemplary embodiments to those skilled in the art.

[0022] Furthermore, the described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Numerous specific details are provided in the following description to give a full understanding of embodiments of the present invention. However, those skilled in the art will recognize that the technical solutions of the present invention can be practiced without one or more of the specific details, or other methods, components, apparatuses, steps, etc., may be employed. In other instances, well-known methods, apparatuses, implementations, or operations are not shown or described in detail to avoid obscuring various aspects of the present invention.

[0023] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0024] like Figures 1 to 2 As shown, this embodiment provides a vibration damper, including: a cylindrical part 1, a piston part 2, and a coil part 3. The cylindrical part 1 is a conductor structure and has a guide cavity 101. The piston part 2 is located in the guide cavity 101 and is telescopically connected to the cylindrical part 1. The piston part 2 can telescopically extend and retract relative to the cylindrical part 1 along the axial direction x of the guide cavity 101. The coil part 3 is located in the guide cavity 101 and is connected to the piston part 2. The coil part 3 is used to communicate with a power source.

[0025] It should be understood that the coil part 3 is connected to the piston part 2, and the coil part 3 and the piston part 2 can synchronously extend and retract relative to the cylinder part 1 along the axial x of the guide cavity 101.

[0026] In this embodiment, the cylindrical part 1 is a conductor structure, that is, the cylindrical part 1 is made of conductor material.

[0027] For example, the conductor material can be copper, aluminum, etc.

[0028] In this embodiment, when the vehicle passes over a special road surface, the coil section 3 can be connected to the power supply to generate a magnetic field in the piston section 2. Since the cylinder section 1 is a conductor structure and the piston section 2 can extend and retract relative to the cylinder section 1 along the axial direction x of the guide cavity 101, when the piston section 2 extends and retracts relative to the cylinder section 1, the cylinder section 1 cuts the magnetic field lines and generates an induced current. According to Lenz's law, the induced current generates an electromagnetic damping force that opposes the movement of the piston section 2, thereby enhancing the damping force of the shock absorber to ensure the vehicle's comfort and handling.

[0029] It should be understood that Lenz's law states that when a conductor cuts a magnetic field to generate an induced current, the magnetic field of the induced current always opposes the change in magnetic flux that caused it (repelling the incoming current and retaining the outgoing current). That is, the magnetic field generated by the induced current will resist the change in the original magnetic field (either strengthening or weakening it).

[0030] Specifically, if the original magnetic flux is increasing, the magnetic field of the induced current will be in the opposite direction to the original magnetic field; this is called "increasing and reversing". If the original magnetic flux is decreasing, the magnetic field of the induced current will be in the same direction as the original magnetic field; this is called "decreasing and simultaneous".

[0031] It should be understood that the magnitude of the electromagnetic damping force can be achieved by adjusting the number of turns of the coil section 3, the input current of the power supply, or the gap between the coil section 3 and the cylinder section 1. The more turns the coil section 3 has, the greater the input current, or the smaller the gap between the coil section 3 and the cylinder section 1, the stronger the electromagnetic damping force; conversely, the weaker it is.

[0032] Combination Figure 1 and Figure 2 As shown, the piston part 2 is provided with a through hole 201, which is independent of the guide cavity 101; the damper also includes a lead wire part 4, which is located in the through hole 201. One end of the lead wire part 4 is connected to the coil part 3, and the other end of the lead wire part 4 is used to connect to the power supply.

[0033] In this embodiment, the lead wire 4 is disposed in the through hole 201 of the piston part 2, so that the lead wire 4 is hidden in the piston part 2, thereby avoiding interference between the lead wire 4 and other components in the guide cavity 101, and thus avoiding the lead wire 4 from affecting the extension and retraction movement of the piston part 2 relative to the cylinder part 1.

[0034] In addition, the lead wire 4 connects the coil part 3 to the power supply, so that the power supply can input current into the coil part 3. The coil part 3 with the input current can generate a magnetic field. When the coil part 3 moves in parallel with the piston part 2 relative to the cylinder part 1, the cylinder part 1 will cut the magnetic field lines and generate an induced current, and then generate an electromagnetic damping force that opposes the movement of the piston part 2 through the induced current.

[0035] Combination Figure 1 and Figure 2 As shown, the piston part 2 includes a piston rod 21 and a piston body 22. One end of the piston rod 21 is located outside the guide cavity 101, and the other end of the piston rod 21 is located inside the guide cavity 101 and connected to the piston body 22. A groove 202 is provided on the outer periphery of the piston body 22; the coil part 3 is located in the groove 202.

[0036] In this embodiment, an annular groove 202 is provided on the outer periphery of the piston body 22, so that the coil part 3 can be arranged in the groove 202 of the piston body 22, thereby preventing the coil part 3 from affecting the movement of the piston body 22 relative to the cylinder part 1.

[0037] In this embodiment, the through hole 201 includes a first hole section 201a and a second hole section 201b that are interconnected. The first hole section 201a is located inside the piston rod 21, and the second hole section 201b is located in the piston body 22 and communicates with the groove 202 so that the coil part 3 can be connected to the power supply through the lead part 4.

[0038] In this embodiment, the end of the piston rod 21 located outside the guide cavity 101 is used to connect with the spring of the suspension system. When the vehicle bounces up and down, the spring is compressed or stretched, thereby driving the piston rod 21 and the piston body 22 to reciprocate within the guide cavity 101.

[0039] Combination Figure 2 As shown, the piston rod 21 includes a main rod section 211 and a protrusion section 212. The main rod section 211 is connected to the protrusion section 212. The protrusion section 212 protrudes from the side circumferential surface of the main rod section 211 to limit the main rod section 211 from sliding out of the guide cavity 101. The piston body 22 is connected to the main rod section 211, and the piston body 22 and the protrusion section 212 are spaced apart along the axial direction of the piston body 22 (along the axial direction x of the guide cavity 101).

[0040] In this embodiment, the protrusion segment 212 is welded or riveted to the main rod segment 211 and protrudes from the side circumferential surface of the main rod segment 211. When the protrusion segment 212 extends synchronously with the main rod segment 211 along the axial x of the guide cavity 101 relative to the cylindrical part 1, the protrusion segment 212 abuts against the cylindrical part 1. The protrusion segment 212 can limit the stroke of the main rod segment 211 relative to the cylindrical part 1, thereby controlling the limit stroke of the shock absorber to control the movement stroke of the wheel.

[0041] In this embodiment, the protrusion segment 212 is a "ring structure" and the protrusion segment 212 is arranged around the side circumferential surface of the main rod segment 211.

[0042] In other embodiments, the bump segment 212 is an "arc-shaped structure" or a "rectangular structure", and multiple mutually spaced bump segments 212 are arranged around the side circumferential surface of the main rod segment 211.

[0043] Combination Figure 1 As shown, the cylindrical body 1 includes an inner cylindrical body 11 and an outer cylindrical body 12 that are parallel to each other on the axis. The inner cylindrical body 11 is located inside the outer cylindrical body 12 and is spaced apart from the outer cylindrical body 12. The inner cylindrical body 11 has a conductor structure and a guide cavity 101 is located in the inner cylindrical body 11. The cylindrical body 1 also includes a limiting member 13, which is located inside the outer cylindrical body 12 and is connected to the end of the inner cylindrical body 11 and the outer cylindrical body 12.

[0044] In this embodiment, the inner cylinder 11 is a working cylinder, and the inner cylinder 11 includes an inner surface and an outer surface, with the inner surface being closer to the piston body 22 than the outer surface. Since the piston body 22 can reciprocate along the inner surface of the inner cylinder 11, the inner cylinder 11 can not only support the piston body 22, but also restrict the movement trajectory of the piston body 22. The outer cylinder 12 is provided with a mounting cavity 102, and the inner cylinder 11 is located in the mounting cavity 102 and spaced apart from the cavity wall of the mounting cavity 102. The cylinder part 1 also includes a bottom valve 14, which is located on the side of the inner cylinder 11 away from the limiting member 13, and the bottom valve 14 is connected to both the inner cylinder 11 and the outer cylinder 12.

[0045] Regarding the structure of the bottom valve 14, please refer to the existing technology; it will not be described in detail here.

[0046] In summary, the installation sequence of the cylinder part 1 is as follows: First, the bottom valve 14 is installed at the bottom of the mounting cavity 102; after the bottom valve 14 is installed, the inner cylinder 11 is installed in the mounting cavity 102; then, the limiting member 13 is installed and the inner cylinder 11 is pressed tightly; finally, the end of the outer cylinder 12 near the limiting member 13 is pressed inward to form a flange, so that the limiting member 13 is limited between the end of the inner cylinder 11 and the flange, thus completing the installation.

[0047] In this embodiment, the surfaces of the piston body 22, the coil part 3, and the outer cylinder 12 that are in contact with each other are provided with a Teflon coating. The Teflon coating can reduce friction and wear.

[0048] Furthermore, the main rod segment 211 passes through the limiting member 13 and can move relative to the limiting member 13 along the axial x-axis of the guide cavity 101.

[0049] In this embodiment, the limiting member 13 is provided with a limiting hole 103 passing through the limiting member 13 along the axial direction x of the guide cavity 101, and the main rod segment 211 passes through the limiting hole 103. When the main rod segment 211 moves telescopically relative to the cylinder portion 1 along the axial direction x of the guide cavity 101, the limiting member 13 can restrict the movement direction of the main rod segment 211 and prevent the movement direction of the main rod segment 211 from deviating. In addition, the limiting member 13 is located between the outer cylinder 12 and the main rod segment 211, and the limiting member 13 can withstand part of the radial force to provide support.

[0050] Combination Figure 1 and Figure 2 As shown, the piston rod 21 also includes a magnetic component 213. The magnetic component 213 and the limiting component 13 are arranged opposite each other along the axial direction x of the guide cavity 101. The magnetic component 213 is connected to the side of the protrusion section 212 facing the limiting component 13. The limiting component 13 is a magnetic structure, and the magnetic pole of the limiting component 13 near the magnetic component 213 is the same as the magnetic pole of the magnetic component 213 near the limiting component 13.

[0051] In this embodiment, both the magnetic component 213 and the limiting component 13 are magnets. The magnetic pole of the limiting component 13 near the magnetic component 213 is the N pole, and the magnetic pole of the magnetic component 213 near the limiting component 13 is also the N pole.

[0052] In other embodiments, the magnetic pole of the limiting member 13 near the magnetic member 213 can be the S pole, and the magnetic pole of the magnetic member 213 near the limiting member 13 can also be the S pole.

[0053] For example, the magnetic component 213 and the limiting component 13 can be made of materials such as neodymium iron boron magnets and ferrite magnets.

[0054] In this embodiment, when the piston rod 21 extends along the axial x of the guide cavity 101 relative to the cylindrical part 1, the magnetic element 213 moves toward the limiting element 13. Since the magnetic pole of the limiting element 13 near the magnetic element 213 is the same as the magnetic pole of the magnetic element 213 near the limiting element 13, the smaller the distance between the magnetic element 213 and the limiting element 13 or the faster the approach speed, the greater the repulsive force generated by the same magnetic pole, thereby avoiding the limiting element 13 from contacting the protrusion section 212 and generating abnormal noise.

[0055] In this embodiment, the shock absorber also includes oil, which fills the inner cylinder 11 and the outer cylinder 12. The oil can serve as both a damping medium and a heat dissipation channel.

[0056] Combination Figure 2 As shown, the guide cavity 101 includes an upper cavity 101a and a lower cavity 101b. The upper cavity 101a and the lower cavity 101b are respectively disposed on two opposite sides of the piston body 22 along the axial direction x of the guide cavity 101. A valve hole 203 is provided in the piston body 22. The valve hole 203 penetrates the piston body 22 and is spaced apart from the groove 202. The valve hole 203 connects the upper cavity 101a and the lower cavity 101b.

[0057] In this embodiment, the guide cavity 101 is filled with oil, which is located in the upper cavity 101a and the lower cavity 101b. The piston body 22 is provided with a valve hole 203, which can connect the upper cavity 101a and the lower cavity 101b, thereby realizing bidirectional flow of oil between the upper cavity 101a and the lower cavity 101b.

[0058] Combination Figure 1 and Figure 2 As shown, the piston part 2 also includes a first valve plate 23 and a second valve plate 24. The first valve plate 23 and the second valve plate 24 are respectively disposed on two opposite sides of the piston body 22 along the axial direction x of the guide cavity 101. The first valve plate 23 covers part of the valve hole 203, and the second valve plate 24 covers part of the valve hole 203.

[0059] In this embodiment, the first valve plate 23 is located in the upper cavity 101a and contacts the side of the piston body 22 near the limiting member 13. The first valve plate 23 is connected to the main rod section 211. The second valve plate 24 is located in the lower cavity 101b and contacts the side of the piston body 22 away from the limiting member 13. The second valve plate 24 is connected to the main rod section 211.

[0060] In this embodiment, since the first valve plate 23 and the second valve plate 24 both cover part of the valve hole 203, when the piston part 2 extends relative to the cylinder part 1 along the axial direction x of the guide cavity 101, the piston body 22 moves upward, and part of the oil in the upper cavity 101a flows through the valve hole 203 not covered by the first valve plate 23 and pushes open the second valve plate 24 (overcoming the rigidity of the second valve plate 24) to flow into the lower cavity 101b; when the piston part 2 retracts relative to the cylinder part 1 along the axial direction x of the guide cavity 101, the piston body 22 moves downward, and part of the oil in the lower cavity 101b flows through the valve hole 203 not covered by the second valve plate 24 and pushes open the first valve plate 23 (overcoming the rigidity of the first valve plate 23) to flow into the upper cavity 101a. Therefore, the first valve plate 23 and the second valve plate 24 can control the flow cross-sectional area of ​​the oil, thereby hindering the flow of the oil and generating hydraulic damping force.

[0061] It should be understood that the first valve plate 23 and the second valve plate 24 will deform under the action of oil pressure, so that a gap is generated between the first valve plate 23 and the piston body 22 or between the second valve plate 24 and the piston body 22. The oil can flow through the gap, thereby realizing the oil exchange between the upper cavity 101a and the lower cavity 101b.

[0062] In this embodiment, when the vehicle is traveling on a normal road surface, the hydraulic damping force generated by the oil flow is sufficient to meet the driving requirements, and the coil unit 3 does not need to be energized. When the vehicle is traveling on a special road surface, the coil unit 3 needs to be energized. The hydraulic damping force generated by the oil flow and the electromagnetic damping force generated by the induced current work together to ensure the vehicle's driving performance.

[0063] This embodiment also provides a vehicle, including an air spring and the above-described shock absorber, wherein the shock absorber is connected to the air spring.

[0064] For other aspects of the vehicle's structure, please refer to existing technology; details will not be elaborated here.

[0065] In this utility model, unless otherwise explicitly specified and limited, the terms "assembly" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0066] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. "A plurality of" means two or more, unless otherwise explicitly specified. The terms "some embodiments," "exemplarily," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this utility model.

[0067] The illustrative expressions of the terms used above do not necessarily refer to the same embodiments or examples. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, those skilled in the art can combine and integrate the different embodiments or examples described herein, as well as the features of those different embodiments or examples, without contradiction.

[0068] Although embodiments of the present invention have been shown and described above, it should be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention. Therefore, all changes or modifications made in accordance with the claims and description of the present invention should fall within the scope of the patent coverage of the present invention.

Claims

1. A damper characterized by, include: The cylindrical body is a conductor structure and has a guide cavity. A piston section is located within the guide cavity and is telescopically connected to the cylindrical section. The piston section can extend and retract relative to the cylindrical section along the axial direction of the guide cavity. The coil section is located inside the guide cavity and is connected to the piston section. The coil section is used to communicate with a power source.

2. The damper of claim 1, wherein The piston portion is provided with a through hole; The vibration damper also includes a lead wire portion located inside the through hole. One end of the lead wire portion is connected to the coil portion, and the other end of the lead wire portion is used to connect to a power source.

3. The damper of claim 1, wherein The piston part includes a piston rod and a piston body. One end of the piston rod is located outside the guide cavity, and the other end of the piston rod is located inside the guide cavity and connected to the piston body. The piston body is provided with a groove. The coil portion is located within the groove.

4. The damper of claim 3, wherein The piston rod includes a main rod section and a protrusion section. The main rod section is connected to the protrusion section. The protrusion section protrudes from the side peripheral surface of the main rod section to restrict the main rod section from sliding out of the guide cavity. The piston body is connected to the main rod section, and the piston body and the protrusion section are spaced apart.

5. The damper of claim 4, wherein The cylindrical part includes an inner cylindrical body and an outer cylindrical body. The inner cylindrical body is located inside the outer cylindrical body and is spaced apart from the outer cylindrical body. The inner cylindrical body has a conductor structure, and the guide cavity is located in the inner cylindrical body. The cylindrical body also includes a limiting member, which is located inside the outer cylindrical body and is connected to the inner cylindrical body and the outer cylindrical body. The main rod section passes through the limiting member and can move axially along the guide cavity relative to the limiting member.

6. The damper of claim 5, wherein The piston rod also includes a magnetic component, which is disposed opposite to the limiting component along the axial direction of the guide cavity, and the magnetic component is connected to the side of the protrusion section near the limiting component; The limiting member is a magnetic structure, and the magnetic pole of the limiting member near the magnetic member is the same as the magnetic pole of the magnetic member near the limiting member.

7. The damper of claim 5, wherein The guide cavity includes an upper cavity and a lower cavity, and the upper cavity and the lower cavity are respectively disposed on two opposite sides of the piston body along the axial direction of the guide cavity; The piston body is provided with a valve hole that penetrates the piston body and is spaced apart from the groove. The valve hole connects the upper cavity and the lower cavity.

8. The damper of claim 7, wherein The piston portion further includes a first valve plate and a second valve plate. The first valve plate and the second valve plate are disposed on two opposite sides of the piston body in a one-to-one correspondence along the axial direction of the guide cavity. The first valve plate covers part of the valve hole, and the second valve plate covers part of the valve hole.

9. The damper of claim 1, wherein The shock absorber also includes oil, which fills the cylindrical portion.

10. A vehicle characterized by comprising: It includes an air spring and a damper as described in any one of claims 1-9, wherein the damper is connected to the air spring.

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