Damping device, its open-cell cushioning element and vehicle

Abstract

The present disclosure discloses a damping device, a porous buffer thereof, and a vehicle. The porous buffer of the damping device comprises a base body having a pore, and a flexible hydrophobic layer provided on a wall surface of the pore, the flexible hydrophobic layer comprising a surface sub-layer provided on the wall surface of the pore, and a penetration sub-layer penetrating into the base body. The porous buffer of the present disclosure has excellent energy absorption performance, mechanical properties, durability, and waterproof performance, and has the advantages of long service life and the like.

Description

Technical Field

[0001] This disclosure relates to the field of vehicle engineering, and more specifically, to vibration damping devices and their perforated buffers, and to vehicles having such perforated buffers. Background Technology

[0002] Shock absorbers are an important component of a vehicle's suspension system, used to absorb impact forces. To improve their cushioning performance and durability, shock absorbers are porous. In wet environments or when encountering flooded roads, water can enter these pores, leading not only to a decrease in the shock absorber's mechanical properties but also to hydrolysis, material embrittlement, and even cracking. Furthermore, the increased weight of the shock absorber after absorbing water can affect the vehicle's dynamic balance. Utility Model Content

[0003] This disclosure aims to at least partially address one of the technical problems in the related art. To this end, this disclosure proposes a vibration damping device and its perforated buffer, as well as a vehicle.

[0004] The perforated buffer of the vibration damping device disclosed herein includes: a substrate having pores; a flexible hydrophobic layer disposed on the wall of the pores, the flexible hydrophobic layer including: a surface sublayer disposed on the wall of the pores; and a permeable sublayer permeating into the substrate.

[0005] The open-type buffer disclosed herein has excellent energy absorption performance, mechanical properties, durability and waterproof performance, and also has the advantage of long service life.

[0006] Optionally, the ratio of the thickness of the permeable sublayer to the thickness of the substrate is greater than 0 and less than or equal to 0.3. This allows for a more secure adhesion of the flexible hydrophobic layer to the substrate while reducing the permeation time (e.g., immersion time) and material usage of the permeable sublayer (flexible hydrophobic layer), thereby improving the manufacturing efficiency and reducing the manufacturing cost of the flexible hydrophobic layer (open-cell buffer).

[0007] Optionally, the thickness of the surface sublayer is greater than or equal to 10 μm and less than or equal to 50 μm; and / or the thickness of the permeable sublayer is greater than 0 mm and less than or equal to 6 mm.

[0008] By making the thickness of the surface sublayer greater than or equal to 10 μm and less than or equal to 50 μm, not only can the surface sublayer have excellent waterproof performance and mechanical strength, but it can also prevent the surface sublayer from occupying too much space in the pores of the substrate, thereby preventing the surface sublayer from affecting the energy absorption performance of the substrate (open-pore buffer).

[0009] By making the thickness of the permeable sublayer less than or equal to 2 mm, the amount of material used in the flexible hydrophobic layer can be reduced while ensuring that the flexible hydrophobic layer adheres more firmly to the substrate. This also reduces the time for the flexible hydrophobic layer to penetrate into the substrate, thereby reducing the manufacturing cost and improving the manufacturing efficiency of the open-cell buffer.

[0010] Optionally, the matrix is ​​a polyurethane foam block with a density greater than or equal to 0.3 g / cm³ and less than or equal to 0.7 g / cm³. This allows the matrix to more effectively absorb impact energy and reduce vibration.

[0011] Optionally, the flexible hydrophobic layer is a silicone-modified polyurethane layer or a fluorocarbon resin layer. This allows the flexible hydrophobic layer to possess excellent waterproof performance and flexibility.

[0012] Optionally, the contact angle of the flexible hydrophobic layer is greater than or equal to 120 degrees; or the ratio of the elastic modulus of the flexible hydrophobic layer to the elastic modulus of the matrix is ​​(0.8-1.2):1; or the tensile elongation of the flexible hydrophobic layer is greater than or equal to 300%.

[0013] By making the contact angle of the flexible hydrophobic layer greater than or equal to 120 degrees, the flexible hydrophobic layer can have excellent waterproof performance and can effectively prevent water from entering the pores of the substrate.

[0014] By setting the ratio of the elastic modulus of the flexible hydrophobic layer to that of the matrix to be (0.8-1.2):1, the elastic modulus of the flexible hydrophobic layer can be matched with that of the matrix. This not only prevents the flexible hydrophobic layer from adversely affecting the energy absorption performance and buffering capacity of the matrix, but also further prevents the flexible hydrophobic layer from peeling off from the pore walls due to frequent compression.

[0015] By making the tensile elongation of the flexible hydrophobic layer greater than or equal to 300%, the flexible hydrophobic layer can have better flexibility, thereby further preventing the flexible hydrophobic layer from deforming due to frequent compression, so as to further prevent the flexible hydrophobic layer from peeling off from the pore wall.

[0016] The vibration damping device disclosed herein includes: an open-type buffer, wherein the open-type buffer is the open-type buffer of the vibration damping device disclosed herein; and a vibration damper, wherein the open-type buffer cooperates with the vibration damper, or the open-type buffer and the vibration damper are independently arranged.

[0017] The vibration damping device disclosed herein has excellent energy absorption performance, mechanical properties, durability and waterproof performance, and also has the advantage of long service life.

[0018] Optionally, the vibration damper includes a cylinder body, a cylinder head, and a piston rod. The cylinder head is disposed within the cylinder body, a portion of the piston rod is located within the cylinder body, and another portion of the piston rod passes through the cylinder head to extend out of the cylinder body. An open-type buffer is disposed on the other portion of the piston rod, and the open-type buffer mates with the cylinder head. This allows for a more compact structure of the vibration damping device.

[0019] Optionally, the perforated buffer and the vibration damper are independently arranged. The vibration damping device further includes: a mounting base on which the perforated buffer is disposed; an elastic pad on which the perforated buffer cooperates; and an elastic element, one end of which is connected to the mounting base and the other end of which is connected to the elastic pad. This allows the vibration damping device to have superior energy absorption performance.

[0020] The vehicle disclosed herein includes an open-type buffer, which is an open-type buffer of the vibration damping device of the present disclosure, or the vehicle disclosed herein includes the vibration damping device of the present disclosure.

[0021] The vehicle disclosed herein has the advantages of good vibration reduction performance and comfortable ride. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the perforated buffer according to an embodiment of the present disclosure; Figure 2 This is a schematic diagram of the structure of a vibration damping device according to an embodiment of the present disclosure; Figure 3 This is a structural schematic diagram of a vibration damping device according to another embodiment of the present disclosure. Detailed Implementation

[0023] Embodiments of this disclosure are described in detail below, with examples of these embodiments illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this disclosure, and should not be construed as limiting it.

[0024] The perforated buffer 1 of the vibration damping device 100 according to an embodiment of the present disclosure is described below with reference to the accompanying drawings. Figure 1 As shown, the perforated buffer 1 of the vibration damping device 100 according to an embodiment of the present disclosure includes a substrate 11 and a flexible hydrophobic layer 12. The substrate 11 has pores. The flexible hydrophobic layer 12 is disposed on the walls of the pores.

[0025] The flexible hydrophobic layer 12 includes a surface sublayer and a permeable sublayer. The surface sublayer is disposed on the walls of the pores to prevent moisture from entering the pores of the substrate 11. The permeable sublayer penetrates into the substrate 11. In other words, the flexible hydrophobic layer 12 has a waterproof function and constitutes a waterproof layer.

[0026] According to the embodiments of the present disclosure, the open-type buffer 1 has a flexible hydrophobic layer 12 provided on the wall of the pores of the substrate 11. The flexible hydrophobic layer 12 can block water from entering the pores of the substrate 11, so as to not only prevent water from reducing the mechanical properties of the substrate 11 (open-type buffer 1) such as compression resilience and fatigue resistance, and prevent water from causing hydrolysis of the substrate 11, but also not increase the weight of the open-type buffer 1, so as to prevent affecting the dynamic balance of the vehicle.

[0027] Furthermore, by utilizing the flexible hydrophobic layer 12 to prevent moisture from entering the pores of the substrate 11, the water accumulation in the pores is prevented from freezing in low-temperature environments, thus preventing the substrate 11 (open-cell buffer 1) from becoming brittle or even cracking, thereby extending the service life of the open-cell buffer 1. Moreover, the flexible hydrophobic layer 12 located on the walls of the pores does not seal the pores, thus not affecting the energy absorption performance and durability of the substrate 11 (open-cell buffer 1).

[0028] Because the flexible hydrophobic layer 12 is flexible, it will not deform due to frequent compression, thus preventing it from peeling off from the pore walls and extending the service life of the open-cell buffer 1. This ensures that both the substrate 11 and the open-cell buffer 1 maintain excellent waterproof performance. After 1000 cycles of compression fatigue testing, the flexible hydrophobic layer 12 showed no cracking or peeling, and its permanent compression deformation rate was less than or equal to 8%.

[0029] By setting a permeable sublayer that penetrates into the substrate 11, the flexible hydrophobic layer 12 can be more firmly attached to the substrate 11, that is, the flexible hydrophobic layer 12 is more firmly attached to the pores of the substrate 11, thereby further preventing the flexible hydrophobic layer 12 from peeling off from the pore wall, so as to further improve the waterproof durability of the open-pore buffer 1 and further extend the service life of the open-pore buffer 1.

[0030] Therefore, the perforated buffer 1 according to the embodiments of this disclosure has excellent energy absorption performance, mechanical properties, durability and waterproof performance, and also has the advantages of long service life.

[0031] The matrix 11 can be a polyurethane foam block, which can effectively absorb impact energy and reduce vibration. The density of the matrix 11 is greater than or equal to 0.3 grams per cubic centimeter. And less than or equal to 0.7 grams per cubic centimeter, so that the substrate 11 can more effectively absorb impact energy and reduce vibration.

[0032] The flexible hydrophobic layer 12 is a silicone-modified polyurethane layer or a fluorocarbon resin layer. This gives the flexible hydrophobic layer 12 excellent waterproof performance and flexibility.

[0033] Optionally, the contact angle of the flexible hydrophobic layer 12 is greater than or equal to 120 degrees. This allows the flexible hydrophobic layer 12 to have excellent waterproof performance, effectively preventing moisture from entering the pores of the substrate 11.

[0034] Optionally, the ratio of the elastic modulus of the flexible hydrophobic layer 12 to that of the substrate 11 is (0.8-1.2):1. This allows the elastic modulus of the flexible hydrophobic layer 12 to match that of the substrate 11, thereby preventing the flexible hydrophobic layer 12 from adversely affecting the energy absorption and buffering capacity of the substrate 11, and further preventing the flexible hydrophobic layer 12 from peeling off from the pore walls due to frequent compression.

[0035] Optionally, the tensile elongation of the flexible hydrophobic layer 12 is greater than or equal to 300%. This allows the flexible hydrophobic layer 12 to have better flexibility, thereby further preventing the flexible hydrophobic layer 12 from deforming due to frequent compression, so as to further prevent the flexible hydrophobic layer 12 from peeling off from the pore walls.

[0036] The flexible hydrophobic layer 12 includes a surface sublayer and a permeable sublayer. The surface sublayer is disposed on the wall of the pores to prevent moisture from entering the pores of the substrate 11. The permeable sublayer penetrates into the substrate 11 to make the flexible hydrophobic layer 12 adhere more firmly to the substrate 11, that is, to the pores of the substrate 11, thereby further preventing the flexible hydrophobic layer 12 from peeling off from the pore wall, thereby further improving the waterproof durability of the open-pore buffer 1 and further extending the service life of the open-pore buffer 1.

[0037] Optionally, the ratio of the thickness of the permeable sublayer to the thickness of the substrate 11 is greater than 0 and less than or equal to 0.3, that is, the ratio of the thickness of the permeable sublayer to the thickness of the substrate 11 is 0-0.3 (inclusive of 0.3 and exclusive of 0). In other words, the penetration depth of the permeable sublayer does not exceed 30% of the thickness of the substrate 11. This allows for a more secure adhesion of the flexible hydrophobic layer 12 to the substrate 11, while reducing the penetration time (e.g., immersion time) and material usage of the permeable sublayer (flexible hydrophobic layer 12), thereby improving the manufacturing efficiency and reducing the manufacturing cost of the flexible hydrophobic layer 12 (open-cell buffer 1).

[0038] In some embodiments, the ratio of the thickness of the permeable sublayer to the thickness of the substrate 11 is greater than 0 and less than or equal to 0.2, that is, the penetration depth of the permeable sublayer does not exceed 20% of the thickness of the substrate 11; or, the ratio of the thickness of the permeable sublayer to the thickness of the substrate 11 is greater than 0 and less than or equal to 0.1, that is, the penetration depth of the permeable sublayer does not exceed 10% of the thickness of the substrate 11. This not only allows the flexible hydrophobic layer 12 to adhere more firmly to the substrate 11, but also further reduces the penetration time (e.g., immersion time) and material usage of the permeable sublayer (flexible hydrophobic layer 12), further improving the manufacturing efficiency of the flexible hydrophobic layer 12 (open-cell buffer 1) and further reducing the manufacturing cost of the flexible hydrophobic layer 12 (open-cell buffer 1).

[0039] Optionally, the thickness of the surface sublayer is greater than or equal to 10 μm and less than or equal to 50 μm. This not only enables the surface sublayer to have excellent waterproof performance and mechanical strength, but also prevents the surface sublayer from occupying too much space in the pores of the substrate 11, thereby preventing the surface sublayer from affecting the energy absorption performance of the substrate 11 (open-cell buffer 1).

[0040] In some embodiments, the thickness of the surface sublayer is greater than or equal to 20 μm and less than or equal to 35 μm. This allows for a further reduction in the space occupied by the surface sublayer in the pores of the substrate 11 while ensuring excellent waterproof performance and mechanical strength, thereby further preventing the surface sublayer from affecting the energy absorption performance of the substrate 11 (open-cell buffer 1).

[0041] Optionally, the thickness of the permeable sublayer is greater than 0 mm and less than or equal to 6 mm, that is, the thickness of the permeable sublayer is 0 mm to 6 mm (inclusive of 6 mm but exclusive of 0 mm). This allows for a more secure adhesion of the flexible hydrophobic layer 12 to the substrate 11 while reducing the amount of material used in the flexible hydrophobic layer 12 and decreasing the time it takes for the flexible hydrophobic layer 12 to penetrate into the substrate 11, thereby reducing the manufacturing cost of the open-cell buffer 1 and improving its manufacturing efficiency.

[0042] In some embodiments, to further reduce the time it takes for the flexible hydrophobic layer 12 to penetrate into the substrate 11, reduce manufacturing costs, and improve manufacturing efficiency, the thickness of the permeable sublayer can be designed to be smaller. For example, the thickness of the permeable sublayer can be designed to be 2 mm, 3 mm, or 4 mm.

[0043] The following describes a method for manufacturing the perforated buffer 1 according to an embodiment of the present disclosure. The substrate 11 is a polyurethane foam block, and the flexible hydrophobic layer 12 is an organosilicon-modified polyurethane layer or a fluorocarbon resin layer.

[0044] First, the polyurethane foam block is cleaned using plasma to remove surface impurities from the substrate 11 and activate the pores of the substrate 11.

[0045] Then, the polyurethane foam block is immersed in a silicone-modified polyurethane solution or a fluorocarbon resin solution to impregnate the walls of the pores in the matrix 11. The polyurethane foam block is immersed in the silicone-modified polyurethane solution or fluorocarbon resin solution for 1 minute to 40 minutes to control the penetration depth of the silicone-modified polyurethane solution or fluorocarbon resin to be approximately 0.1 mm to 6 mm, that is, to control the thickness of the permeated sublayer to be approximately 0.1 mm to 6 mm. The solid content of the silicone-modified polyurethane solution is 0.5 wt% to 40 wt%, and the solid content of the fluorocarbon resin solution is 0.5 wt% to 40 wt%.

[0046] Gradient curing is then performed. Pre-curing is first carried out at 25°C-95°C for 0.1-5 hours, followed by curing at 100°C-180°C for 0.1-8 hours to form a continuous flexible hydrophobic layer 12 on the pore walls of the substrate 11. After gradient curing, a 35μm thick surface sublayer (flexible hydrophobic layer 12) is formed on the pore walls of the substrate 11, with a contact angle of approximately 150 degrees.

[0047] Finally, remove any residual solution from the surface of the perforated buffer 1.

[0048] The flexible hydrophobic layer 12 effectively prevents moisture from penetrating the pores of the substrate 11, and the 24-hour absorption rate of the open-cell buffer 1 is less than or equal to 0.5%. After 1000 cycles of compression fatigue testing, the flexible hydrophobic layer 12 showed no cracking or peeling, and the compression set of the flexible hydrophobic layer 12 was less than or equal to 8%. After aging for 500 hours in a humid heat environment of 85°C / 85%RH, the tensile strength retention rate of the open-cell buffer 1 was greater than or equal to 90%. Dynamic compression testing showed that the energy absorption efficiency of the open-cell buffer 1 disclosed herein deviated from that of existing open-cell buffers by less than 3%.

[0049] This disclosure also discloses a vibration damping device. According to an embodiment of this disclosure, the vibration damping device includes an open-type buffer 1 and a vibration damper 2. The open-type buffer 1 cooperates with the vibration damper 2. Alternatively, the open-type buffer 1 and the vibration damper 2 are disposed independently of each other.

[0050] Accordingly, the vibration damping device 100 according to the embodiments of this disclosure has excellent energy absorption performance, mechanical properties, durability and waterproof performance, and also has the advantages of long service life.

[0051] like Figure 2As shown, the vibration damper 2 includes a cylinder body 21, a cylinder head 22, and a piston rod 23. The cylinder head 22 is located within the cylinder body 21, a portion 231 of the piston rod 23 is located inside the cylinder body 21, and the other portion 232 of the piston rod 23 passes through the cylinder head 22 to extend out of the cylinder body 21. An open-type buffer 1 is located on the other portion 232 of the piston rod 23, and the open-type buffer 1 mates with the cylinder head 22. This allows for a more compact structure of the vibration damping device 100.

[0052] When the vibration damping device 100 is compressed, the perforated buffer 1 and the piston rod 23 move together, with the perforated buffer 1 moving towards the cylinder head 22. After the perforated buffer 1 contacts the cylinder head 22, it is compressed to absorb energy.

[0053] Optionally, the perforated buffer 1 is provided on the support 4, and the support 4 can be installed on the chassis suspension of the vehicle.

[0054] like Figure 3 As shown, the perforated buffer 1 and the vibration damper 2 are independently arranged. The vibration damping device 100 also includes a mounting base 31, an elastic element pad 32, and an elastic element 33. The perforated buffer 1 is disposed on the mounting base 31 and cooperates with the elastic element pad 32. One end of the elastic element 33 is connected to the mounting base 31, and the other end of the elastic element 33 is connected to the elastic element pad 32. This allows the vibration damping device 100 to have better energy absorption performance.

[0055] When the vibration damping device 100 is compressed, the perforated buffer 1 moves toward the adjacent elastic pad 32. After the perforated buffer 1 comes into contact with the elastic pad 32, the perforated buffer 1 is compressed to absorb energy.

[0056] For example, the mounting base 31 and the perforated buffer 1 are located above the elastic element pad 32. The upper end of the elastic element 33 is connected to the mounting base 31, and the lower end of the elastic element 33 is connected to the elastic element pad 32. The shock absorber 2 and the mounting base 31 can be installed on the chassis suspension of the vehicle. When the shock absorber 100 is compressed, the perforated buffer 1 moves downward. After the perforated buffer 1 contacts the elastic element pad 32, it is compressed to absorb energy.

[0057] This disclosure also discloses a vehicle. A vehicle according to an embodiment of this disclosure includes an open-type buffer member 1. Alternatively, a vehicle according to an embodiment of this disclosure includes a shock-absorbing device 100. Accordingly, the vehicle according to an embodiment of this disclosure has advantages such as good shock absorption performance and comfortable ride.

[0058] In the description of this disclosure, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this disclosure and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure.

[0059] 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this disclosure, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0060] In this disclosure, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," "fixing," etc., 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, an electrical connection, or a connection that allows communication between components; 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, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0061] In this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0062] In this disclosure, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this disclosure. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0063] Although embodiments of the present disclosure have been shown and described above, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present disclosure. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present disclosure.

Claims

1. An open-type buffer component for a vibration damping device, characterized in that, include: Matrix, the matrix having pores; A flexible hydrophobic layer, wherein the flexible hydrophobic layer is disposed on the wall of the pores, the flexible hydrophobic layer comprising: A surface sublayer is disposed on the wall surface of the pore; and A permeable sublayer that penetrates into the matrix.

2. The open-cell cushioning of claim 1, wherein, The ratio of the thickness of the permeable sublayer to the thickness of the matrix is ​​greater than 0 and less than or equal to 0.

3.

3. The perforated buffer component of the vibration damping device according to claim 1, characterized in that, The thickness of the surface sublayer is greater than or equal to 10 μm and less than or equal to 50 μm; and / or The thickness of the permeable sublayer is greater than 0 mm and less than or equal to 6 mm.

4. The open-cell cushioning of claim 1, wherein, The matrix is ​​a polyurethane foam block, and the density of the matrix is ​​greater than or equal to 0.3 grams per cubic centimeter and less than or equal to 0.7 grams per cubic centimeter.

5. The open-cell cushioning of claim 1, wherein, The flexible hydrophobic layer is an organosilicon-modified polyurethane layer or a fluorocarbon resin layer.

6. The perforated buffer element of the vibration damping device according to claim 1, characterized in that, The contact angle of the flexible hydrophobic layer is greater than or equal to 120 degrees; or The ratio of the elastic modulus of the flexible hydrophobic layer to the elastic modulus of the substrate is (0.8-1.2):1; or The tensile elongation of the flexible hydrophobic layer is greater than or equal to 300%.

7. A vibration damping device characterized by comprising: include: An open-type buffer, wherein the open-type buffer is an open-type buffer of the vibration damping device according to any one of claims 1-6; and The vibration damper is provided in conjunction with the perforated buffer, or the perforated buffer and the vibration damper are provided independently of each other.

8. The vibration damping device according to claim 7, characterized by The shock absorber includes a cylinder body, a cylinder head, and a piston rod. The cylinder head is disposed in the cylinder body. A portion of the piston rod is located in the cylinder body, and another portion of the piston rod passes through the cylinder head to extend out of the cylinder body. The perforated buffer is disposed in the other portion of the piston rod and cooperates with the cylinder head.

9. The vibration damping device according to claim 7, characterized by The perforated buffer and the vibration damper are arranged independently of each other, and the vibration damping device further includes: Mounting base, wherein the perforated buffer is disposed on the mounting base; The elastic element pad, wherein the perforated buffer element mates with the elastic element pad; and An elastic element, one end of which is connected to the mounting base, and the other end of which is connected to the elastic element pad.

10. A vehicle characterized by comprising: It includes an open-type buffer, wherein the open-type buffer is an open-type buffer of the vibration damping device according to any one of claims 1-6, or includes the vibration damping device according to any one of claims 7-9.

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