shock absorber

Abstract

The application provides a shock absorber, and relates to the technical field of vehicle shock absorption, which optimizes the structure of the shock absorber to a certain extent and avoids the problem that the piston rod contacts the valve system of the bottom valve in the compression limit case. The shock absorber comprises a cylinder mechanism, a piston mechanism, a buffer assembly and a bottom valve assembly. Part of the piston mechanism is arranged in the cylinder mechanism and can reciprocate along the axial direction of the cylinder mechanism relative to the cylinder mechanism. The bottom valve assembly is arranged at the bottom of the cylinder mechanism. The buffer assembly comprises a buffer piece and a positioning piece. The positioning piece is connected with the bottom valve assembly, and the buffer piece is connected with the positioning piece. A cavity is formed in the buffer piece, and a drain hole is formed on the buffer piece, which communicates the cavity with the inside of the cylinder mechanism.

Description

Technical Field

[0001] This invention relates to the field of vehicle vibration reduction technology, and in particular to a vibration damper and a vehicle. Background Technology

[0002] In vehicle suspension systems, shock absorbers are key components for suppressing vibrations and improving ride comfort and driving stability. Common shock absorbers typically consist of a cylinder block, piston rod assembly, and bottom valve assembly. Their working principle primarily relies on the cooperation between the piston valve system and the bottom valve system, dissipating kinetic energy through the damping force generated by the flow of fluid through the valve system. In practical applications, especially when the vehicle experiences severe bumps, the shock absorber will reach its compression limit. Under this extreme condition, there is a risk of rigid contact or collision between the internal piston rod and the bottom valve system. This contact can not only produce abnormal noises but also easily cause impact damage to the valve system itself, leading to shock absorber failure, changes in damping characteristics, and affecting the reliability and service life of the shock absorber.

[0003] Therefore, there is an urgent need to provide a vibration damper to address the problems existing in the current technology to some extent. Summary of the Invention

[0004] The purpose of this invention is to provide a vibration damper that optimizes the damper structure to a certain extent and avoids the problem of contact between the piston rod and the bottom valve system under compression limit conditions.

[0005] The present invention provides a vibration damper, comprising a cylinder mechanism, a piston mechanism, a buffer assembly, and a bottom valve assembly; a portion of the piston mechanism is disposed within the cylinder mechanism and is capable of reciprocating relative to the cylinder mechanism along the axial direction of the cylinder mechanism; the bottom valve assembly is disposed at the bottom of the cylinder mechanism; the buffer assembly includes a buffer member and a positioning member, the positioning member being connected to the bottom valve assembly, and the buffer member being connected to the positioning member; a cavity is formed within the buffer member, and an oil drain hole is formed on the buffer member, the oil drain hole communicating with the interior of the cylinder mechanism.

[0006] The positioning element is plate-shaped and threadedly connected to the bottom valve assembly. The buffer element is cylindrical, and one end of the buffer element is interference-fitted with the positioning element.

[0007] Specifically, the positioning member has a first assembly portion and a second assembly portion. The first assembly portion is formed at one end of the positioning member facing the bottom valve assembly, and the first assembly portion is interference-fitted with the bottom valve assembly. The second assembly portion is formed at one end of the positioning member facing the buffer member, and the buffer member is interference-fitted with the second assembly portion.

[0008] Furthermore, the positioning member includes a first positioning protrusion, a bearing portion, and a first seat portion; the bearing portion is formed on the first seat portion, and the diameter of the bearing portion is smaller than the diameter of the first seat portion; the first positioning protrusion is formed on the bearing portion, and the diameter of the first positioning protrusion is smaller than the diameter of the bearing portion; a positioning hole is formed along the axial direction of the buffer member, the positioning hole is interference-fitted with the first positioning protrusion, and the end face of the buffer member is mounted on the bearing portion.

[0009] Furthermore, the bearing portion has a plurality of clearance portions formed circumferentially, and the plurality of clearance portions are evenly distributed along the circumferential direction of the bearing portion. The first base portion has an oil passage hole corresponding to the position of the clearance portion, and the oil passage hole penetrates the first base portion circumferentially.

[0010] The piston mechanism includes a piston assembly and a top seat. The top seat is connected to one end of the piston assembly located within the cylinder mechanism, and the top seat can abut against the end of the buffer member to compress the buffer member.

[0011] Specifically, the top seat includes a second seat body and a second positioning protrusion. The second positioning protrusion is formed at one end of the second seat body facing the buffer member, and the diameter of the second positioning protrusion is smaller than the diameter of the second seat body, so that the diameter of the second seat body is adapted to the diameter of the buffer member. The diameter of the second positioning protrusion is smaller than the diameter of the positioning hole.

[0012] Specifically, the piston assembly includes a piston rod and a piston valve system. The piston valve system is disposed at one end of the piston rod located within the cylinder mechanism, thereby forming a rod chamber and a rodless chamber within the cylinder mechanism. The piston valve system also has a connecting oil hole for the flow of a portion of the oil within the rod chamber and the rodless chamber.

[0013] Furthermore, the buffer includes multiple support sections and multiple deformation sections, with a deformation section between two support sections and a support section between two deformation sections, and the support sections and the deformation sections are arranged coaxially.

[0014] Furthermore, the shock absorber provided in this application also includes a first solenoid valve and / or a second solenoid valve. The cylinder mechanism includes an outer cylinder, a first intermediate cylinder and / or a second intermediate cylinder, and an inner cylinder. The first solenoid valve is mounted on the outer cylinder and is capable of communicating with the inner cavity of the outer cylinder and the intermediate cavity formed by the first intermediate cylinder and the inner cylinder. The second solenoid valve is mounted on the outer cylinder and is capable of communicating with the inner cavity of the outer cylinder and the intermediate cavity formed by the second intermediate cylinder and the inner cylinder. A portion of the piston mechanism is disposed in the inner cylinder and is capable of axial reciprocating relative to the inner cylinder, forming a rod-type cavity and a rodless cavity.

[0015] Compared with existing technologies, the vibration damper provided by this invention has the following advantages: The shock absorber provided by the present invention includes a cylinder mechanism, a piston mechanism, a buffer assembly, and a bottom valve assembly; a portion of the piston mechanism is disposed within the cylinder mechanism and is capable of reciprocating relative to the cylinder mechanism along the axial direction of the cylinder mechanism; the bottom valve assembly is disposed at the bottom of the cylinder mechanism; the buffer assembly includes a buffer member and a positioning member, the positioning member being connected to the bottom valve assembly, and the buffer member being connected to the positioning member; a cavity is formed within the buffer member, and an oil drain hole is formed on the buffer member, the oil drain hole communicating with the interior of the cylinder mechanism.

[0016] Analysis shows that the cylinder block mechanism provides a stable mounting base and operating space. This application further incorporates a buffer assembly within the cylinder block mechanism, comprising a positioning element and a buffer element. The positioning element serves as a connecting hub, with one end connected to the bottom valve assembly and the other end connected to the buffer element. The buffer element has an internal cavity with an oil drain hole on its wall, allowing the cavity to maintain communication with the inner cavity of the cylinder block mechanism.

[0017] When the shock absorber is in its normal compression stroke, the hydraulic fluid flows normally through the piston valve system and bottom valve assembly, generating damping. As the piston mechanism moves to its compression limit position, just before colliding with the bottom structure, the buffer component first contacts the piston mechanism. During compression, the buffer component's material undergoes elastic deformation to absorb impact energy. Simultaneously, the hydraulic fluid within its cavity can be slowly squeezed out through the drain hole, generating an additional hydraulic buffering effect. This, to a certain extent, avoids the technical problem of rigid collisions between the piston rod and the bottom valve system that may occur in traditional shock absorbers during the ultimate compression stroke.

[0018] Therefore, this application uses the physical deformation of the buffer and the fluid damping generated by the cavity oil leakage to form a flexible buffer zone that can absorb a large amount of fluid, effectively isolating the piston mechanism and the bottom valve assembly, avoiding hard impacts, thereby protecting the valve system and improving the reliability and durability of the shock absorber. Attached Figure Description

[0019] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of the first type of dual-valve vibration damper provided in the embodiments of the present invention; Figure 2 This is a schematic diagram of the structure of the second type of single-valve vibration damper provided in the embodiments of the present invention; Figure 3 This is a schematic diagram of the structure of the buffer assembly in the vibration damper provided in an embodiment of the present invention.

[0021] In the figure: 1-Outer cylinder body; 2-First intermediate cylinder; 3-Second intermediate cylinder; 4-Inner cylinder body; 401-Rod chamber; 402-Rodless chamber; 5-Piston rod; 6-Piston valve system; 7-Positioning component; 701-First seat part; 702-Bearing part; 703-Allowing part; 704-First positioning protrusion; 8-Buffer component; 801-Support section; 802-Deformation section; 803-Drain hole; 9-Top seat; 901-Second seat part; 902-Second positioning protrusion; 10-Bottom valve assembly; 11-First solenoid valve; 12-Second solenoid valve. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0023] In the description of the embodiments of this application, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of the invention is in use. They are only for the convenience of describing the invention and simplifying the description, and do not 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 the invention. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0024] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," not that the structure must be completely horizontal, but can be slightly tilted.

[0025] In the description of the embodiments of this application, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0026] As used herein, the term “and / or” includes any one of the relevant items listed and any combination of any two or more items.

[0027] For ease of description, spatial relation terms such as “above,” “upper,” “below,” and “lower” may be used herein to describe the relationship between one element and another as shown in the accompanying drawings. Such spatial relation terms are intended to include not only the orientation depicted in the drawings but also the different orientations of the device during use or operation.

[0028] The terminology used herein is for the purpose of describing various examples only and is not intended to limit this disclosure. Unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. The terms “comprising,” “including,” and “having” enumerate the stated features, quantities, operations, components, elements, and / or combinations thereof, but do not exclude the presence or addition of one or more other features, quantities, operations, components, elements, and / or combinations thereof.

[0029] Variations in the shapes shown in the accompanying drawings may occur due to manufacturing techniques and / or tolerances. Therefore, the examples described herein are not limited to the specific shapes shown in the accompanying drawings, but include changes in shape that may occur during manufacturing.

[0030] The features of the examples described herein can be combined in various ways that will be apparent upon understanding the disclosure of this application. Furthermore, although the examples described herein have various constructions, other constructions are possible, as will be apparent upon understanding the disclosure of this application. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis that they can be implemented by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0031] like Figure 1 As shown, the present invention provides a shock absorber, including a cylinder mechanism, a piston mechanism, a buffer assembly, and a bottom valve assembly 10; a portion of the piston mechanism is disposed within the cylinder mechanism and is capable of reciprocating relative to the cylinder mechanism along the axial direction of the cylinder mechanism; the bottom valve assembly 10 is disposed at the bottom of the cylinder mechanism; the buffer assembly includes a buffer member 8 and a positioning member 7, the positioning member 7 being connected to the bottom valve assembly 10, and the buffer member 8 being connected to the positioning member 7; a cavity is formed within the buffer member 8, and an oil drain hole 803 is formed on the buffer member 8, the oil drain hole 803 communicating with the interior of the cylinder mechanism.

[0032] Compared with existing technologies, the vibration damper provided by this invention has the following advantages: The shock absorber provided by the present invention includes a cylinder mechanism, a piston mechanism, a buffer assembly, and a bottom valve assembly 10; a portion of the piston mechanism is disposed within the cylinder mechanism and is capable of reciprocating relative to the cylinder mechanism along the axial direction of the cylinder mechanism; the bottom valve assembly 10 is disposed at the bottom of the cylinder mechanism; the buffer assembly includes a buffer member 8 and a positioning member 7, the positioning member 7 is connected to the bottom valve assembly 10, and the buffer member 8 is connected to the positioning member 7; a cavity is formed inside the buffer member 8, and an oil drain hole 803 is formed on the buffer member 8, the oil drain hole 803 communicating with the interior of the cylinder mechanism.

[0033] Analysis shows that the cylinder block mechanism provides a stable installation base and working space. This application further incorporates a buffer assembly within the cylinder block mechanism, comprising a positioning element 7 and a buffer element 8. The positioning element 7 serves as a connecting hub, with one end connected to the bottom valve assembly 10 and the other end connected to the buffer element 8. The buffer element 8 has an internal cavity with an oil drain hole 803 on its wall, allowing the cavity to maintain communication with the inner cavity of the cylinder block mechanism.

[0034] When the shock absorber is in its normal compression stroke, the oil flows normally through the piston valve system 6 and the bottom valve assembly 10, generating damping. When the piston mechanism moves to its compression limit position, just before colliding with the bottom structure, the buffer 8 will first contact the piston mechanism. During the compression process, the material of the buffer 8 itself will undergo elastic deformation to absorb the impact energy. At the same time, the oil in its cavity can be slowly squeezed out through the drain hole 803, generating an additional hydraulic buffering effect. This can, to a certain extent, avoid the technical problem that the piston rod 5 may rigidly collide with the bottom valve system during the extreme compression stroke of a traditional shock absorber.

[0035] Therefore, this application uses the physical deformation of the buffer 8 and the fluid damping generated by the cavity oil leakage to form a flexible buffer zone that can absorb a large amount of fluid, effectively isolating the piston mechanism from the bottom valve assembly 10, avoiding hard impacts, thereby protecting the valve system and improving the reliability and durability of the shock absorber.

[0036] It should be noted that the buffer 8 in this application can be made of plastic or rubber, which means it has a certain strength and can deform accordingly under extreme conditions, thereby avoiding problems caused by direct contact or collision between the piston rod 5 and the bottom valve system.

[0037] Optionally, such as Figure 1 As shown, the positioning member 7 in this application is plate-shaped and threadedly connected to the bottom valve assembly 10. The buffer member 8 is cylindrical, and one end of the buffer member 8 is interference-fitted with the positioning member 7.

[0038] In the first embodiment of the positioning component 7 of this application, the positioning component 7 is further assembled on the original threaded structure of the bottom valve assembly 10. In this embodiment, the positioning component 7 is plate-shaped and is assembled with the bottom valve assembly 10 through the threaded structure. After the positioning component 7 is assembled, the buffer component 8 and the positioning component 7 are assembled through a press-fit operation. In order to ensure the stability of the connection between the two, the buffer component 8 in this application has a variable amount. Therefore, the buffer component 8 and the positioning component 7 in this application adopt an interference fit assembly method to achieve the fixed connection between the two.

[0039] It should be further explained here that, since the buffer 8 needs to participate in the deformation buffering and oil flow process, the cylindrical buffer 8 can achieve the purpose of buffering deformation and oil flow. Furthermore, the diameter of the oil drain hole 803 formed on the buffer 8 in this application is relatively small. When the buffer 8 continuously deforms, the oil drain hole 803 will be blocked or the flow area will shrink under the influence of the buffer 8's deformation, thereby enabling the buffer 8's own damping force to continuously increase. That is, as the buffer 8 is continuously compressed, the required pressure will continuously increase, thus avoiding the problem of the buffer 8 being compressed too quickly after being impacted.

[0040] Optionally, such as Figure 3 As shown, in the second embodiment of the positioning member 7 of this application, the positioning member 7 specifically has a first assembly part and a second assembly part. The first assembly part is formed at one end of the positioning member 7 facing the bottom valve assembly 10, and the first assembly part is interference-fitted with the bottom valve assembly 10; the second assembly part is formed at one end of the positioning member 7 facing the buffer member 8, and the buffer member 8 is interference-fitted with the second assembly part.

[0041] In the second embodiment of the positioning member 7 of this application, the first assembly part faces the bottom valve assembly 10 and is connected to the bottom valve assembly 10 by an interference fit, and the second assembly part faces the buffer member 8 and is also connected to the buffer member 8 by an interference fit. Therefore, by forming the first assembly part and the second assembly part on the positioning member 7, this application can achieve a stable connection between the buffer member 8, the positioning member 7 and the bottom valve assembly 10.

[0042] When the vibration damper is working, the force acting on the buffer 8 is transmitted to the positioning part 7 through the interference surface of the second assembly part, and then to the bottom valve assembly 10 through the interference surface of the first assembly part. The force transmission path is clear and direct. Furthermore, the use of a unified interference fit connection method simplifies the structure and processing requirements of the positioning part 7, improves assembly efficiency, and ensures the coaxiality and stability of the connection.

[0043] Based on this, such as Figure 3 As shown, the positioning member 7 in this application includes a first positioning protrusion 704, a bearing portion 702, and a first seat portion 701; the bearing portion 702 is formed on the first seat portion 701, and the diameter of the bearing portion 702 is smaller than the diameter of the first seat portion 701; the first positioning protrusion 704 is formed on the bearing portion 702, and the diameter of the first positioning protrusion 704 is smaller than the diameter of the bearing portion 702; a positioning hole is formed along the axial direction of the buffer member 8, and the positioning hole is interference-fitted with the first positioning protrusion 704; and the end face of the buffer member 8 is mounted on the bearing portion 702.

[0044] In this application, the support portion 702 is formed on the first base portion 701, and its diameter is smaller than that of the first base portion 701, thereby forming a stepped surface. The first positioning protrusion 704 is formed on the support portion 702, and its diameter is further reduced, forming a smaller protrusion. The buffer member 8 has a through positioning hole along the axial direction. During assembly, the positioning hole of the buffer member 8 is fitted onto the first positioning protrusion 704, and radial positioning and fixation are achieved through the interference fit between the two. At the same time, the end face of the buffer member 8, that is, the end face of the orifice of the positioning hole, is precisely mounted on the annular stepped surface of the support portion 702, thereby ensuring the positioning accuracy of the buffer member 8 in the axial and radial directions to a certain extent.

[0045] Understandably, the bearing portion 702 can function as a contact and support with the end face of the buffer member 8, ensuring that the deformation process of the buffer member 8 is a uniform change along the axial direction. The first positioning protrusion 704 can achieve an interference fit connection between the buffer member 8 and the positioning member 7. On the other hand, since the first positioning protrusion 704 can extend into the positioning hole after assembly, it can play a certain guiding role during the compression and recovery process of the buffer member 8, ensuring that the deformation process proceeds along the axial direction to a certain extent.

[0046] Optionally, such as Figure 3 As shown, the bearing portion 702 in this application has a plurality of clearance portions 703 formed in the circumferential direction. The plurality of clearance portions 703 are evenly distributed along the circumferential direction of the bearing portion 702. The first base portion 701 has an oil passage hole formed at the position corresponding to the clearance portion 703. The oil passage hole passes through the first base portion 701 in the circumferential direction.

[0047] This application forms multiple clearance portions 703 evenly distributed circumferentially on the support portion 702, such as by cutting and machining multiple grooves or notches in the circumferential direction of the original support portion 702. Simultaneously, on the first base portion 701, at positions corresponding to these clearance portions 703, oil passage holes are formed along the axial direction of the first base portion 701. In this embodiment, since the buffer member 8 and the bottom valve assembly 10 need to be connected via a positioning member 7, when the internal oil of the buffer member 8 is compressed and flows out through the drain hole 803, it needs to pass through the positioning member 7 to enter the oil passage hole of the bottom valve assembly 10. This application, through the machined clearance portions 703 and the corresponding oil passage holes, can constitute a reliable oil flow path. When the buffer member 8 is compressed or rebounds, the oil can flow smoothly through this path between the cavity of the buffer member 8 and the main cavity of the cylinder, ensuring the timeliness and effectiveness of the hydraulic buffering effect and avoiding buffering failure or cavitation caused by poor oil flow.

[0048] Optionally, such as Figure 3 As shown, the piston mechanism in this application includes a piston assembly and a top seat 9. The top seat 9 is connected to one end of the piston assembly located in the cylinder mechanism, and the top seat 9 can abut against the end of the buffer member 8 to compress the buffer member 8.

[0049] In this application, the top seat 9 is connected to one end of the piston assembly that extends into the cylinder. When the compression stroke of the damper is near the end, as the piston assembly moves down, the top seat 9 will contact the upper end of the buffer 8 before the piston valve system 6. As compression continues, the top seat 9 begins to compress the buffer 8, causing it to deform. This avoids the piston valve system 6 directly contacting and impacting the buffer 8, which could potentially damage the precision structure of the valve system itself.

[0050] Optionally, such as Figure 3As shown, the top seat 9 in this application includes a second seat body 901 and a second positioning protrusion 902. The second positioning protrusion 902 is formed at one end of the second seat body 901 facing the buffer member 8, and the diameter of the second positioning protrusion 902 is smaller than the diameter of the second seat body 901, so that the diameter of the second seat body 901 is adapted to the diameter of the buffer member 8. The diameter of the second positioning protrusion 902 is smaller than the diameter of the positioning hole.

[0051] At the end of the compression stroke, the second positioning protrusion 902 can partially extend into the positioning hole of the buffer 8, playing a preliminary guiding and centering role to ensure that the top seat 9 can apply pressure to the center of the buffer 8. The second seat body 901 with a matching diameter provides sufficient contact area to ensure uniform pressure distribution. Since the diameter of the second positioning protrusion 902 is smaller than that of the positioning hole, even if there is a slight centering error, there will be no interference, and oil is allowed to flow through the gap. Therefore, the top seat 9 of this application, through further optimization, can avoid the problem of uneven wear or impact noise that may occur when the top seat 9 contacts the buffer 8 due to misalignment. It achieves flexible guidance before contact, ensures axial centering transmission of the compressive force, improves the smoothness and stability of the buffering process, and avoids component damage caused by hard interference.

[0052] Preferably, such as Figure 3 As shown, the buffer 8 in this application includes multiple support sections 801 and multiple deformation sections 802. A deformation section 802 is provided between two support sections 801, and a support section 801 is provided between two deformation sections 802. The support sections 801 and deformation sections 802 are arranged coaxially.

[0053] The buffer 8 in this application is composed of multiple support sections 801 and multiple deformation sections 802 arranged alternately and coaxially, forming a wave-like or bellows-like shape. When subjected to axial compression, the relatively rigid support sections 801 mainly provide load-bearing and guidance, while the relatively flexible deformation sections 802 are prone to elastic deformation through axial compression and radial expansion, and are the main part for absorbing impact energy. This alternating structure makes the axial movement of the buffer 8 gradual, thereby avoiding, to a certain extent, the problems of unstable deformation or stress concentration of the buffer 8.

[0054] Optionally, such as Figure 1 Combination Figure 2 As shown, the piston assembly in this application includes a piston rod 5 and a piston valve system 6. The piston valve system 6 is disposed at one end of the piston rod 5 located in the cylinder mechanism, so that a rod chamber 401 and a rodless chamber 402 are formed in the cylinder mechanism. The piston valve system 6 is also provided with a connecting oil hole for the flow of a portion of the oil in the rod chamber 401 and the rodless chamber 402.

[0055] The piston valve system 6 divides the inner cavity of the inner cylinder 4 into a rod chamber 401 and a rodless chamber 402. Through a specific connecting oil hole on the piston valve system 6, which is often in conjunction with a valve plate, the piston valve system 6 is a commonly used functional component at present. Therefore, the internal detailed structure will not be described in detail here. By setting the piston valve system 6, when the piston mechanism reciprocates, the oil is forced to flow between the rod chamber 401 and the rodless chamber 402 through the connecting oil hole and the valve plate of the piston valve system 6, generating the main damping force and realizing the vibration reduction function.

[0056] Based on this, when the buffer 8 is compressed, the oil in the buffer 8 will enter the inner cavity formed by the outer cylinder 1 through the bottom valve assembly 10 to achieve oil balance.

[0057] Optionally, such as Figure 1 Combination Figure 2 As shown, the vibration damper provided in this application further includes a first solenoid valve 11 and / or a second solenoid valve 12. The cylinder mechanism includes an outer cylinder 1, a first intermediate cylinder 2 and / or a second intermediate cylinder 3, and an inner cylinder 4. The first solenoid valve 11 is installed on the outer cylinder 1 and can connect the inner cavity of the outer cylinder 1 and the intermediate cavity formed by the first intermediate cylinder 2 and the inner cylinder 4. The second solenoid valve 12 is installed on the outer cylinder 1 and can connect the inner cavity of the outer cylinder 1 and the intermediate cavity formed by the second intermediate cylinder 3 and the inner cylinder 4. A portion of the piston mechanism is disposed in the inner cylinder 4 and can reciprocate axially relative to the inner cylinder 4, forming a rod chamber 401 and a rodless chamber 402.

[0058] This application provides two implementation methods: single-valve control and dual-valve control. When single-valve control is used, i.e., the overall structure only has a first solenoid valve 11, the rigidity of the piston valve system 6 connected to the piston rod 5 is relatively small, thereby enabling the flow of oil in the rod chamber 401 and the rodless chamber 402 to achieve a damping effect. When dual-valve control is used, i.e., the outer cylinder 1 has a first solenoid valve 11 and a second solenoid valve 12, the number of internal intermediate cylinders is also two, i.e., the first intermediate cylinder 2 is set corresponding to the first solenoid valve 11, and the second intermediate cylinder 3 is set corresponding to the second solenoid valve 12.

[0059] Since the flow of oil and the adjustment of damping are both controlled by two solenoid valves in this method, the piston valve system 6 has a large rigidity. That is, in this embodiment, a small amount of oil flows through the piston valve system 6 in the rod chamber 401 and the rodless chamber 402, and the main flow process needs to be realized through the two solenoid valves.

[0060] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A vibration damper, characterized in that, This includes the cylinder block mechanism, piston mechanism, buffer assembly, and bottom valve assembly; A portion of the piston mechanism is disposed within the cylinder mechanism and is capable of reciprocating relative to the cylinder mechanism along the axial direction of the cylinder mechanism. The bottom valve assembly is disposed at the bottom of the cylinder block mechanism, and the buffer assembly includes a buffer member and a positioning member. The positioning member is connected to the bottom valve assembly, and the buffer member is connected to the positioning member. The buffer has a cavity, and the buffer has an oil drain hole, which connects the cavity to the interior of the cylinder mechanism.

2. The vibration damper according to claim 1, characterized in that, The positioning element is plate-shaped and threadedly connected to the bottom valve assembly. The buffer element is cylindrical, and one end of the buffer element is interference-fitted with the positioning element.

3. The vibration damper according to claim 1, characterized in that, The positioning member has a first assembly portion and a second assembly portion. The first assembly portion is formed at one end of the positioning member facing the bottom valve assembly, and the first assembly portion is interference-fitted with the bottom valve assembly. The second assembly is formed at one end of the positioning member facing the buffer member, and the buffer member is interference-fitted with the second assembly.

4. The vibration damper according to claim 3, characterized in that, The positioning component includes a first positioning protrusion, a bearing portion, and a first base portion; The supporting portion is formed on the first base portion, and the diameter of the supporting portion is smaller than the diameter of the first base portion. The first positioning protrusion is formed on the supporting portion, and the diameter of the first positioning protrusion is smaller than the diameter of the supporting portion. A positioning hole is formed along the axial direction of the buffer member, and the positioning hole is interference-fitted with the first positioning protrusion. The end face of the buffer member is mounted on the supporting portion.

5. The vibration damper according to claim 4, characterized in that, The bearing portion has a plurality of clearance portions formed circumferentially, and the plurality of clearance portions are evenly distributed along the circumferential direction of the bearing portion. The first base portion has an oil passage hole formed at the position of the clearance portion, and the oil passage hole passes through the first base portion circumferentially.

6. The vibration damper according to claim 4, characterized in that, The piston mechanism includes a piston assembly and a top seat. The top seat is connected to one end of the piston assembly located within the cylinder mechanism, and the top seat can abut against the end of the buffer member to compress the buffer member.

7. The vibration damper according to claim 6, characterized in that, The top seat includes a second seat body and a second positioning protrusion. The second positioning protrusion is formed at one end of the second seat body facing the buffer member, and the diameter of the second positioning protrusion is smaller than the diameter of the second seat body, so that the diameter of the second seat body is adapted to the diameter of the buffer member. The diameter of the second positioning protrusion is smaller than the diameter of the positioning hole.

8. The vibration damper according to claim 6, characterized in that, The piston assembly includes a piston rod and a piston valve system. The piston valve system is disposed at one end of the piston rod located within the cylinder mechanism, thereby forming a rod chamber and a rodless chamber within the cylinder mechanism. The piston valve system also has a communicating oil hole for the flow of a portion of the oil within the rod chamber and the rodless chamber.

9. The vibration damper according to claim 1, characterized in that, The buffer includes multiple support sections and multiple deformation sections, with a deformation section between two support sections and a support section between two deformation sections, and the support sections and the deformation sections are arranged coaxially.

10. The vibration damper according to claim 1, characterized in that, It also includes a first solenoid valve and / or a second solenoid valve, and the cylinder mechanism includes an outer cylinder, a first intermediate cylinder and / or a second intermediate cylinder, and an inner cylinder. The first solenoid valve is mounted on the outer cylinder body, and the first solenoid valve can connect the inner cavity of the outer cylinder body and the intermediate cavity formed by the first intermediate cylinder and the inner cylinder body; The second solenoid valve is mounted on the outer cylinder body, and the second solenoid valve can connect the inner cavity of the outer cylinder body and the intermediate cavity formed by the second intermediate cylinder and the inner cylinder body; Part of the piston mechanism is disposed in the inner cylinder and is capable of axial reciprocating relative to the inner cylinder, forming a rod chamber and a rodless chamber.

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