shock absorber

Abstract

The present application relates to the technical field of vehicle engineering, and particularly discloses a shock absorber, wherein an oil storage bucket has an oil storage cavity and a sliding channel communicating with the oil storage cavity; a piston rod is arranged in the sliding channel and has one end in the oil storage cavity and the other end outside the oil storage cavity; a first valve body assembly is connected to the piston rod, the first valve body assembly separates the oil storage cavity and forms a compression side and a rebound side, and the sliding channel communicates with the rebound side; the first valve body assembly has a first channel; the piston rod is provided with a second channel communicating with the compression side and the rebound side, the second channel has an adjusting inlet in the rebound side and an adjusting outlet in the compression side; a first adjusting assembly is used for adjusting the opening degree of the adjusting inlet; a second adjusting assembly is arranged on the piston rod, and the second adjusting assembly is configured to open the adjusting outlet when the piston rod moves to the rebound side and block the adjusting outlet when the piston rod moves to the compression side. The above arrangement realizes the real independent control of rebound and compression damping, and improves the adjusting convenience and environmental adaptability.

Description

Technical Field

[0001] This invention relates to the field of vehicle engineering technology, and more particularly to a shock absorber. Background Technology

[0002] Currently, the mainstream structure for damping force adjustment in the industry mostly adopts a throttling scheme with a gap between the adjusting core and the fastening plug. Specifically, in this type of shock absorber, during rebound adjustment, the push rod drives the adjusting core to move axially to change the fit clearance between it and the fastening plug: when the rebound is softened, the adjusting core moves to the left, forming a larger fit clearance with the fastening plug, and the oil flows to the compression side through the fit clearance; when the rebound is hardened, the adjusting core moves to the right until it is tightly fitted with the fastening plug to block the bypass oil passage. However, this structure has a significant coupling interference defect: during the compression stroke, a small amount of oil still flows directly from the compression side to the rebound side through the fit clearance between the adjusting core and the fastening plug without being throttled by the compression valve plate. This part of the bypassed oil does not generate effective damping force, but accounts for a proportion of the total system flow. When springback adjustment is performed, the flow cross-sectional area of ​​the mating clearance changes, causing a change in the cross-flow rate. Since the total system flow rate is relatively constant, the flow rate passing through the compression valve plate and generating compressive damping force will inevitably change in the opposite direction, ultimately causing the compression force value to fluctuate unexpectedly with the springback adjustment. This strong coupling characteristic between springback and compressive damping makes it difficult for users to accurately match the required damping characteristics, resulting in low adjustment efficiency.

[0003] Furthermore, the operational stability of the existing structure is severely limited by oil temperature variations. During vibration damper operation, a rapid increase in oil temperature leads to a significant decrease in its viscosity, making it more prone to leakage from the minute gap between the adjusting core and the fastening plug. This not only further exacerbates the crossflow during the compression stroke, resulting in a reduction in effective throttling flow, but also causes the damping force to decrease significantly with increasing temperature, severely affecting the performance consistency and service life of the vibration damper under high loads or continuous operating conditions.

[0004] Therefore, it is urgent to research a vibration damper to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide a vibration damper to solve the problems of mutual interference between rebound and compression damping adjustment and performance degradation caused by increased oil temperature in the prior art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A vibration damper, comprising:

[0008] An oil storage tank, the oil storage tank having an oil storage cavity and a sliding channel communicating with the oil storage cavity;

[0009] A piston rod passes through the sliding channel, with one end located inside the oil storage chamber and the other end located outside the oil storage chamber;

[0010] A first valve body assembly is disposed within the oil reservoir and fixedly connected to the piston rod. The first valve body assembly separates the oil reservoir and forms a compression side and a rebound side. The sliding channel communicates with the rebound side. The first valve body assembly has a first channel communicating with the compression side and the rebound side.

[0011] The piston rod is provided with a second channel connecting the compression side and the rebound side, the second channel having an adjustment inlet located on the rebound side and an adjustment outlet located on the compression side;

[0012] A first adjustment component is disposed on the piston rod and is used to adjust the opening degree of the adjustment inlet;

[0013] A second adjustment component is disposed on the piston rod. The second adjustment component is configured to open the adjustment outlet when the piston rod moves toward the springback side and to block the adjustment outlet when the piston rod moves toward the compression side.

[0014] As an optional technical solution for a vibration damper, the second adjustment component includes a first sealing element, an elastic element, and a connecting cylinder. The connecting cylinder is detachably connected to the piston rod, and the internal channel of the connecting cylinder communicates with the adjustment outlet. The elastic element is disposed between the connecting cylinder and the first sealing element, and the first sealing element is used to block the internal channel of the connecting cylinder.

[0015] As an optional technical solution for a vibration damper, the connecting cylinder includes an internally connected guide section and a fixing section. The inner diameter of the fixing section is larger than the inner diameter of the guide section. The first sealing member is located in the fixing section and can move along the axis of the fixing section to block or open the port of the guide section. The side wall of the fixing section is provided with a clearance groove that connects the internal channel and the compression side.

[0016] As an optional technical solution for a vibration damper, the side wall of the fixing part is provided with a plurality of clearance grooves, and a guide arm is formed between adjacent clearance grooves. The elastic element is a spring. The second adjustment assembly also includes a limiting element. The limiting element is located at the end of the spring away from the first sealing element. The end of the guide arm away from the connecting cylinder is bent toward the axis of the connecting cylinder to form a limiting part. The end of the limiting element away from the spring abuts against the limiting parts of the plurality of guide arms.

[0017] As an optional technical solution for a vibration damper, the first sealing member includes a sealing plate and a limiting ring disposed on the sealing plate. The sealing plate is used to seal or open the port of the flow guide. One end of the spring abuts against the sealing plate and is located in the limiting ring.

[0018] As an optional technical solution for a vibration damper, the first adjustment assembly includes a push rod and an adjustment core. The piston rod is provided with an adjustment channel extending through its own axial direction. The piston rod has an oil inlet hole extending radially through the adjustment channel. The oil inlet hole and the portion of the adjustment channel away from the oil inlet hole form a second channel. The adjustment core is disposed in the adjustment channel and moves within the adjustment channel to block or open the oil inlet hole. One end of the push rod is connected to the adjustment core, and the other end is used to cooperate with an external tool.

[0019] As an optional technical solution for a vibration damper, the first valve body assembly includes a first valve body and a second sealing member. The first channel is opened in the first valve body, and the second sealing member is disposed on the piston rod or the first valve body and is used to block or open the first channel. The second sealing member is made of an elastic material.

[0020] As an optional technical solution for the vibration damper, the vibration damper further includes a buffer sleeve, which has a buffer cavity, an opening communicating with the buffer cavity, and a pressure relief hole. The buffer sleeve is disposed on the compression side of the oil storage tank, and the pressure relief hole communicates with the oil storage tank. The vibration damper also includes a second valve body assembly, which is disposed on the piston rod and located on the compression side. During the movement of the piston rod towards the compression side, the second valve body assembly can enter the buffer cavity from the opening of the buffer cavity to squeeze the oil in the buffer cavity out through the pressure relief hole.

[0021] As an optional technical solution for a vibration damper, the second valve body assembly includes a second mounting component, a second mating component, and a second valve body. The second mounting component is disposed on the piston rod, and the second mating component mates with the second mounting component, forming a limiting groove between them. The second valve body is located in the limiting groove along the axial direction of the piston rod. The size of the second valve body is smaller than the size of the limiting groove. The second valve body has a connecting hole. During the movement of the piston rod towards the compression side, the second valve body is in a blocked position, and the first sidewall of the limiting groove blocks the connecting hole. During the movement of the piston rod towards the rebound side, the second valve body is in an open position, and the second sidewall of the limiting groove stops the second valve body without blocking the connecting hole.

[0022] As an optional technical solution for the vibration damper, the vibration damper also includes a nitrogen tank assembly, the oil tank having an oil outlet channel communicating with the oil storage chamber, and the oil inlet channel of the nitrogen tank assembly communicating with the oil outlet channel.

[0023] The present invention has at least the following beneficial effects:

[0024] This invention provides a vibration damper, comprising an oil reservoir, a piston rod, a first valve body assembly, a first adjustment assembly, and a second adjustment assembly. The oil reservoir has an oil storage chamber and a sliding channel communicating with the oil storage chamber. The piston rod passes through the sliding channel, with one end inside the oil storage chamber and the other end outside the oil storage chamber. The first valve body assembly is disposed inside the oil storage chamber and fixedly connected to the piston rod. The first valve body assembly separates the oil storage chamber and forms a compression side and a rebound side, with the sliding channel communicating with the rebound side. The first valve body assembly has a first channel communicating with the compression side and the rebound side. The piston rod has a second channel communicating with the compression side and the rebound side, the second channel having an adjustment inlet on the rebound side and an adjustment outlet on the compression side. The first adjustment assembly is disposed on the piston rod, and the second adjustment assembly is configured to open the adjustment outlet when the piston rod moves towards the rebound side and to block the adjustment outlet when the piston rod moves towards the compression side.

[0025] In use, the opening of the adjustment inlet is controlled by the first adjustment component, thereby realizing the damping change when the piston rod rebounds. The setting of the second adjustment component realizes the unidirectional flow of oil in the second channel, that is, the oil can only flow from the rebound side to the compression side. The opening of the adjustment inlet will not affect the damping of the piston rod during compression, thus realizing truly independent control of rebound and compression damping, improving adjustment convenience and environmental adaptability. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of the present invention and these drawings without creative effort.

[0027] Figure 1 This is a cross-sectional view of the vibration damper in an embodiment of the present invention;

[0028] Figure 2 for Figure 1 A magnified view of a section at point A in the middle;

[0029] Figure 3 for Figure 2 A magnified view of a section at point B in the middle;

[0030] Figure 4 This is a schematic diagram of the connecting cylinder in an embodiment of the present invention;

[0031] Figure 5 This is a cross-sectional view of the shock absorber in an embodiment of the present invention, with the first valve body assembly located in the middle of the oil reservoir.

[0032] Figure 6 This is a cross-sectional view of the shock absorber in an embodiment of the present invention, showing the cooperation between the second valve body assembly and the buffer sleeve;

[0033] Figure 7 for Figure 6 A magnified view of a section at point C.

[0034] In the picture:

[0035] 100. Oil reservoir; 110. Oil storage chamber; 111. Compression side; 112. Springback side;

[0036] 200, Piston rod; 210, Adjustment channel; 211, Adjustment outlet; 220, Oil inlet; 221, Adjustment inlet;

[0037] 300. First valve body assembly; 310. First valve body; 311. First passage; 320. Second sealing element;

[0038] 400. First adjusting component; 410. Push rod; 420. Adjusting core;

[0039] 500. Second adjusting component; 510. First sealing component; 511. Sealing plate; 512. Limiting ring; 520. Elastic component; 530. Connecting cylinder; 531. Flow guide; 532. Fixing part; 5321. Clearance groove; 5322. Guide arm; 5323. Limiting part; 5324. Stepped surface; 540. Limiting component;

[0040] 600, buffer sleeve; 610, buffer cavity; 620, pressure relief hole;

[0041] 700, Second valve body assembly; 710, Second mounting component; 720, Second mating component; 730, Second valve body; 731, Connecting hole; 740, Limiting groove;

[0042] 810. Nitrogen tank assembly; 820. External spring. Detailed Implementation

[0043] Before explaining any implementation of this application in detail, it should be understood that this application is not limited to its application to the structural details and component arrangements set forth in the following description or shown in the above drawings.

[0044] In this application, the terms "comprising," "including," "having," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0045] In this application, the term "and / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three cases: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this application generally indicates that the preceding and following related objects have an "and / or" relationship.

[0046] In this application, the terms "connection," "combination," "coupling," and "installation" can refer to direct connection, combination, coupling, or installation, or indirect connection, combination, coupling, or installation. For example, a direct connection refers to two parts or components being connected together without the need for an intermediary, while an indirect connection refers to two parts or components each being connected to at least one intermediary, with the connection achieved through the intermediary. Furthermore, "connection" and "coupling" are not limited to physical or mechanical connections or couplings, but can also include electrical connections or couplings.

[0047] In this application, those skilled in the art will understand that relative terms (e.g., “about,” “approximately,” “basically,” etc.) used in conjunction with quantities or conditions are to include the values ​​and have the meaning indicated by the context. For example, such relative terms include at least the degree of error associated with the measurement of a particular value, tolerances associated with the particular value due to manufacturing, assembly, use, etc. Such terms should also be considered as disclosing a range defined by the absolute values ​​of the two endpoints. Relative terms may refer to a certain percentage (e.g., 1%, 5%, 10% or more) of the indicated value. Numerical values ​​that do not use relative terms should also be disclosed as specific values ​​with tolerances. Furthermore, “basically” when expressing relative angular relationships (e.g., substantially parallel, substantially perpendicular) may refer to a certain degree (e.g., 1 degree, 5 degrees, 10 degrees or more) added to or subtracted from the indicated angle.

[0048] In this application, those skilled in the art will understand that the function performed by a component can be performed by one component, multiple components, one part, or multiple parts. Similarly, the function performed by a part can also be performed by one part, one component, or a combination of multiple parts.

[0049] In this application, the directional terms "upper," "lower," "left," "right," "front," and "rear" are used to describe the orientation and positional relationships shown in the accompanying drawings and should not be construed as limiting the embodiments of this application. Furthermore, in the context, it should be understood that when an element is mentioned as being connected "upper" or "lower" to another element, it can be directly connected to the other element "upper" or "lower," or indirectly connected through an intermediate element. It should also be understood that directional terms such as upper side, lower side, left side, right side, front side, and rear side not only represent positive orientation but can also be understood as lateral orientation. For example, "below" can include directly below, lower left, lower right, lower front, and lower rear.

[0050] like Figures 1 to 7 As shown, this embodiment provides a vibration damper, which includes an oil reservoir 100, a piston rod 200, a first valve body assembly 300, a first adjusting assembly 400, and a second adjusting assembly 500. The oil reservoir 100 has an oil storage chamber 110 and a sliding channel communicating with the oil storage chamber 110. The piston rod 200 passes through the sliding channel, with one end located inside the oil storage chamber 110 and the other end located outside the oil storage chamber 110. The first valve body assembly 300 is disposed inside the oil storage chamber 110 and fixedly connected to the piston rod 200. The first valve body assembly 300 separates the oil storage chamber 110 and forms a compression side 111 and a rebound side 112, with the sliding channel communicating with the rebound side 112. Component 300 has a first channel 311 connecting the compression side 111 and the rebound side 112; piston rod 200 has a second channel connecting the compression side 111 and the rebound side 112, the second channel having an adjustment inlet 221 located on the rebound side 112 and an adjustment outlet 211 located on the compression side 111; a first adjustment component 400 is disposed on piston rod 200 and is used to adjust the opening degree of adjustment inlet 221; a second adjustment component 500 is disposed on piston rod 200, the second adjustment component 500 being configured to open adjustment outlet 211 when piston rod 200 moves toward the rebound side 112, and to block adjustment outlet 211 when piston rod 200 moves toward the compression side 111.

[0051] In use, the opening of the adjustment inlet 221 is controlled by the first adjustment component 400, thereby realizing the damping change when the piston rod 200 rebounds. The second adjustment component 500 enables unidirectional flow of oil in the second channel, that is, the oil can only flow from the rebound side 112 to the compression side 111. Adjusting the opening of the inlet 221 will not affect the damping of the piston rod 200 during compression, thereby achieving truly independent control of rebound and compression damping, improving adjustment convenience and environmental adaptability.

[0052] In some embodiments, the second adjustment assembly 500 includes a first sealing member 510, an elastic member 520, and a connecting cylinder 530. The connecting cylinder 530 is detachably connected to the piston rod 200, and its internal channel communicates with the adjustment outlet 211. The elastic member 520 is disposed between the connecting cylinder 530 and the first sealing member 510, which blocks the internal channel of the connecting cylinder 530. This configuration allows existing shock absorbers to be improved by cooperating with the second adjustment assembly 500, thereby enabling independent adjustment of the rebound damping. In other embodiments, a one-way valve structure can be integrated inside the second channel of the piston rod 200.

[0053] In some embodiments, the connecting cylinder 530 includes an internally connected guide portion 531 and a fixing portion 532. The inner diameter of the fixing portion 532 is larger than the inner diameter of the guide portion 531. The first sealing member 510 is located in the fixing portion 532 and can move along the axis of the fixing portion 532 to block or open the port of the guide portion 531. The side wall of the fixing portion 532 is provided with a relief groove 5321 that connects the internal channel and the compression side 111. The above arrangement allows the first sealing member 510 to be slidably connected in the connecting cylinder 530, ensuring smooth and reliable movement. By blocking the port of the smaller diameter guide portion 531, the force required is smaller, reducing the elastic force requirement of the elastic member 520 and reducing costs. It should be noted that the port of the guide portion 531 is blocked when the first sealing member 510 moves from the compression side 111 to the rebound side 112 and abuts against the stepped annular surface between the guide portion 531 and the fixing portion 532. As the first sealing element 510 moves from the springback side 112 to the compression side 111, it opens the port of the guide section 531.

[0054] In other embodiments, the first sealing member 510 may be rotatably connected to the connecting cylinder 530 to block or open the internal channel of the connecting cylinder 530, wherein the elastic member 520 may be a torsion spring.

[0055] Specifically, the side wall of the fixing part 532 is provided with several clearance grooves 5321, and guide arms 5322 are formed between adjacent clearance grooves 5321. The elastic element 520 is a spring. The second adjusting assembly 500 also includes a limiting element 540, which is located at the end of the spring away from the first sealing element 510. The end of the guide arm 5322 away from the connecting cylinder 530 is bent towards the axis of the connecting cylinder 530 to form a limiting part 5323. The end of the limiting element 540 away from the spring abuts against the limiting parts 5323 of the several guide arms 5322. The above arrangement allows the spring to be limited only by bending the end of the guide arm 5322 to form the limiting part 5323 after the spring and the limiting element 540 are installed, thus improving the ease of spring installation. At the same time, it reduces the number of parts and improves the reliability of the structure.

[0056] The guide arm 5322 is provided with a stepped surface 5324. One end of the limiting member 540 abuts against the stepped surface 5324, and the other end abuts against the limiting part 5323 to ensure that the position of the limiting member 540 is fixed.

[0057] In some embodiments, the first sealing member 510 includes a sealing plate 511 and a limiting ring 512 disposed on the sealing plate 511. The sealing plate 511 is used to block or open the port of the guide portion 531. One end of a spring abuts against the sealing plate 511 and is located in the limiting ring 512. The above arrangement blocks the port of the guide portion 531 by the spring abutting against the sealing plate 511, and limits the radial position of the spring by the setting of the limiting ring 512 to prevent displacement.

[0058] Regarding the structure of the first adjusting assembly 400, in some embodiments, the first adjusting assembly 400 includes a push rod 410 and an adjusting core 420. The piston rod 200 is provided with an adjusting channel 210 extending through its own axial direction. The piston rod 200 has an oil inlet hole 220 extending radially through the adjusting channel 210. The oil inlet hole 220 and the portion of the adjusting channel 210 away from the oil inlet hole 220 form a second channel. The adjusting core 420 is disposed in the adjusting channel 210 and moves within the adjusting channel 210 to block or open the oil inlet hole 220. One end of the push rod 410 is connected to the adjusting core 420, and the other end is used to cooperate with an external tool. By adjusting the position of the adjusting core 420 through the push rod 410, the opening degree of the oil inlet hole 220 inside the oil storage tank 100 can be adjusted from the outside of the oil storage tank 100, providing high adjustment convenience. In this embodiment, the push rod 410 is rotatably engaged with the adjustment channel 210, and meshes with the adjustment knob via a bevel gear. The push rod 410 is threadedly engaged with the adjustment core 420, and the adjustment core 420 is slidably disposed within the adjustment channel 210. In other embodiments, other existing technologies can be used to adjust the adjustment core 420.

[0059] In some embodiments, the first valve body assembly 300 includes a first valve body 310 and a second sealing member 320. A first channel 311 is formed in the first valve body 310, and the second sealing member 320 is disposed on the piston rod 200 or the first valve body 310 and is used to block or open the first channel 311. The second sealing member 320 is made of an elastic material. The second sealing member 320 is a compression valve plate. This arrangement ensures that during the movement of the piston rod 200 towards the rebound side 112 or the compression side 111, the oil will squeeze and open the second sealing member 320 to pass through the first channel 311, thereby ensuring the damping of the piston rod 200's movement.

[0060] During the movement of the piston rod 200 toward the compression side 111, in order to increase the motion resistance of the later stage, in some embodiments, the damper also includes a buffer sleeve 600. The buffer sleeve 600 has a buffer cavity 610 and an opening communicating with the buffer cavity 610, as well as a pressure relief hole 620. The buffer sleeve 600 is located on the compression side 111 of the oil storage tank 100, and the pressure relief hole 620 communicates with the oil storage tank 100. The damper also includes a second valve body assembly 700. The second valve body assembly 700 is located on the piston rod 200 and on the compression side 111. During the movement of the piston rod 200 toward the compression side 111, the second valve body assembly 700 can enter the buffer cavity 610 from the opening of the buffer cavity 610 to squeeze the oil in the buffer cavity 610 and make the oil flow out from the pressure relief hole 620. The above arrangement causes the second valve body assembly 700 to move into the buffer sleeve 600 when the piston rod 200 moves to its rear section, thereby compressing the oil inside the buffer sleeve 600 and causing it to flow out through the pressure relief hole 620. Since the diameter of the pressure relief hole 620 is smaller than the diameter of the buffer cavity 610, the outflow speed is slowed down, thereby increasing the movement resistance of the second valve body assembly 700 and reducing its speed. It should be noted that in the front section of the piston rod 200 moving towards the compression side 111, the second valve body assembly 700 is located outside the buffer sleeve 600.

[0061] Furthermore, the buffer sleeve 600 has a plurality of pressure relief holes 620, which are spaced apart along the axis of the piston rod 200. This arrangement ensures that as the piston rod 200 moves toward the compression side 111, the resistance gradually increases after the second valve body assembly 700 enters the buffer chamber 610. In other words, as the piston rod 200 moves toward the compression side 111, the second valve body assembly 700 passes through the plurality of pressure relief holes 620 in sequence, thereby gradually reducing the effective pressure relief cross-sectional area of ​​the buffer sleeve 600.

[0062] The second valve body assembly 700 includes a second mounting member 710, a second mating member 720, and a second valve body 730. The second mounting member 710 is disposed on the piston rod 200. The second mating member 720 mates with the second mounting member 710, and a limiting groove 740 is formed between them. The second valve body 730 is located in the limiting groove 740 along the axial direction of the piston rod 200. The size of the second valve body 730 is smaller than the size of the limiting groove 740. The second valve body 730 has a connecting hole 731. During the movement of the piston rod 200 toward the compression side 111, the second valve body 730 is in the blocked position, and the first side wall of the limiting groove 740 blocks the connecting hole 731. During the movement of the piston rod 200 toward the rebound side 112, the second valve body 730 is in the open position, and the second side wall of the limiting groove 740 stops the second valve body 730 without blocking the connecting hole 731. The above configuration ensures that when the piston rod 200 moves towards the compression side 111, after the second valve body 730 enters the buffer sleeve 600, the oil will not pass through the connecting hole 731. With the second valve body 730 in the buffer sleeve 600, when the piston rod 200 moves towards the rebound side 112, the oil will enter the buffer chamber 610 through the connecting hole 731. The second valve body 730 is annular, and the limiting groove 740 is an annular groove. The second mounting member 710 is provided with a flow hole. During the movement of the piston rod 200 towards the rebound side 112, the oil presses against the sealing plate 511 to open the port of the guide section 531. The oil flows from inside the guide section 531 to inside the fixing part 532, flows out from the relief groove 5321, and finally enters the compression side 111 through the flow hole.

[0063] In some embodiments, the vibration damper further includes a nitrogen tank assembly 810, and the oil reservoir 100 has an oil outlet channel communicating with the oil storage chamber 110. The oil inlet channel and the oil outlet channel of the nitrogen tank assembly 810 are connected. The above configuration further improves the vibration damping capability of the vibration damper. The nitrogen tank assembly 810 can be based on existing structures and is not the focus of this application; therefore, it will not be described in detail here.

[0064] In other embodiments, the damper further includes an external spring 820, which is sleeved on the outside of the piston rod 200, with one end abutting against the end of the piston rod 200 away from the oil reservoir 100 and the other end abutting against the oil reservoir 100, so as to further improve the damping performance.

[0065] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A vibration damper, characterized in that, include: An oil storage tank (100) has an oil storage cavity (110) and a sliding channel communicating with the oil storage cavity (110); A piston rod (200) passes through the sliding channel, with one end located inside the oil storage chamber (110) and the other end located outside the oil storage chamber (110); A first valve body assembly (300) is disposed in the oil reservoir (110) and fixedly connected to the piston rod (200). The first valve body assembly (300) separates the oil reservoir (110) and forms a compression side (111) and a rebound side (112). The sliding channel communicates with the rebound side (112). The first valve body assembly (300) has a first channel (311) communicating with the compression side (111) and the rebound side (112). The piston rod (200) is provided with a second channel connecting the compression side (111) and the rebound side (112), the second channel having an adjustment inlet (221) located on the rebound side (112) and an adjustment outlet (211) located on the compression side (111). A first adjustment component (400) is disposed on the piston rod (200) and is used to adjust the opening degree of the adjustment inlet (221); A second adjustment assembly (500) is disposed on the piston rod (200). The second adjustment assembly (500) is configured to open the adjustment outlet (211) when the piston rod (200) moves toward the springback side (112) and to block the adjustment outlet (211) when the piston rod (200) moves toward the compression side (111).

2. The vibration damper according to claim 1, characterized in that, The second adjustment assembly (500) includes a first sealing member (510), an elastic member (520), and a connecting cylinder (530). The connecting cylinder (530) is detachably connected to the piston rod (200). The internal channel of the connecting cylinder (530) communicates with the adjustment outlet (211). The elastic member (520) is disposed between the connecting cylinder (530) and the first sealing member (510). The first sealing member (510) is used to block the internal channel of the connecting cylinder (530).

3. The vibration damper according to claim 2, characterized in that, The connecting cylinder (530) includes an internally connected guide section (531) and a fixing section (532). The inner diameter of the fixing section (532) is larger than the inner diameter of the guide section (531). The first sealing member (510) is located in the fixing section (532) and can move along the axis of the fixing section (532) to block or open the port of the guide section (531). The side wall of the fixing section (532) is provided with a relief groove (5321) that connects the internal channel and the compression side (111).

4. The vibration damper according to claim 3, characterized in that, The side wall of the fixing part (532) is provided with a plurality of clearance grooves (5321), and guide arms (5322) are formed between adjacent clearance grooves (5321). The elastic element (520) is a spring. The second adjusting assembly (500) also includes a limiting element (540). The limiting element (540) is located at the end of the spring away from the first sealing element (510). The end of the guide arm (5322) away from the connecting cylinder (530) is bent toward the axis of the connecting cylinder (530) to form a limiting part (5323). The end of the limiting element (540) away from the spring abuts against the limiting parts (5323) of the plurality of guide arms (5322).

5. The vibration damper according to claim 4, characterized in that, The first sealing member (510) includes a sealing plate (511) and a limiting ring (512) disposed on the sealing plate (511). The sealing plate (511) is used to block or open the port of the guide part (531). One end of the spring abuts against the sealing plate (511) and is located in the limiting ring (512).

6. The vibration damper according to claim 1, characterized in that, The first adjustment assembly (400) includes a push rod (410) and an adjustment core (420). The piston rod (200) is provided with an adjustment channel (210) extending through its own axial direction. The piston rod (200) has an oil inlet (220) extending radially through the adjustment channel (210). The portion of the oil inlet (220) and the adjustment channel (210) away from the oil inlet (220) forms the second channel. The adjustment core (420) is disposed in the adjustment channel (210) and moves in the adjustment channel (210) to block or open the oil inlet (220). One end of the push rod (410) is connected to the adjustment core (420), and the other end is used to cooperate with an external tool.

7. The vibration damper according to any one of claims 1-6, characterized in that, The first valve body assembly (300) includes a first valve body (310) and a second sealing member (320). The first channel (311) is opened in the first valve body (310). The second sealing member (320) is disposed on the piston rod (200) or the first valve body (310) and is used to block or open the first channel (311). The second sealing member (320) is made of elastic material.

8. The vibration damper according to claim 7, characterized in that, The shock absorber further includes a buffer sleeve (600), which has a buffer cavity (610), an opening communicating with the buffer cavity (610), and a pressure relief hole (620). The buffer sleeve (600) is located on the compression side (111) of the oil storage tank (100), and the pressure relief hole (620) communicates with the oil storage tank (100). The shock absorber also includes a second valve body assembly (700), which is located on the piston rod (200) and on the compression side (111). During the movement of the piston rod (200) toward the compression side (111), the second valve body assembly (700) can enter the buffer cavity (610) from the opening of the buffer cavity (610) to squeeze the oil in the buffer cavity (610) out through the pressure relief hole (620).

9. The vibration damper according to claim 8, characterized in that, The second valve body assembly (700) includes a second mounting member (710), a second mating member (720), and a second valve body (730). The second mounting member (710) is disposed on the piston rod (200). The second mating member (720) mates with the second mounting member (710), and a limiting groove (740) is formed between them. The second valve body (730) is located in the limiting groove (740) along the axial direction of the piston rod (200). The size of the second valve body (730) is smaller than the size of the limiting groove (740). The second valve body (730) has a connecting hole (731). When the piston rod (200) moves toward the compression side (111), the second valve body (730) is in the blocked position, and the first side wall of the limiting groove (740) blocks the connecting hole (731). When the piston rod (200) moves toward the rebound side (112), the second valve body (730) is in the open position, and the second side wall of the limiting groove (740) stops the second valve body (730) and does not block the connecting hole (731).

10. The vibration damper according to any one of claims 1-6, characterized in that, The shock absorber also includes a nitrogen tank assembly (810), the oil tank (100) has an oil outlet channel communicating with the oil storage chamber (110), and the oil inlet channel of the nitrogen tank assembly (810) and the oil outlet channel are connected.

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