High stability shock absorber

Abstract

The application discloses a high-stability shock absorber, relates to the field of shock absorbers, and has a first cylinder connected to a first component and a second cylinder connected to a second component, and the first cylinder and the second cylinder are coaxially assembled as a sealed and slidingly matched sliding pair; further comprising a follow-up cylinder assembled between the first cylinder and the second cylinder and capable of sliding freely, the follow-up cylinder is connected with the first cylinder through a first elastic expansion component, the follow-up cylinder is connected with the second cylinder through a second elastic expansion component, and further comprising a sliding lock mechanism for controlling the sliding state of the follow-up cylinder. The application can adjust the expansion amount of the whole shock absorber by the up-and-down movement of the follow-up cylinder, so that the platform carried by the shock absorber is relatively stable, and the shock absorber can better cope with the shock absorption of gentle road sections and complex terrains.

Description

Technical Field

[0001] This invention relates to the field of shock absorbers, and in particular to a high-stability shock absorber. Background Technology

[0002] In a suspension system, vibrations occur due to impacts on the elastic elements. To improve ride comfort, shock absorbers are installed in parallel with the elastic elements. To dampen vibrations, hydraulic shock absorbers are commonly used in automotive suspension systems. Their working principle is that when relative motion occurs between the vehicle frame (or body) and the axle due to vibration, the piston inside the shock absorber moves up and down, causing the oil in the shock absorber chamber to repeatedly flow from one chamber to another through different orifices. The friction between the orifice walls and the oil, as well as the internal friction between oil molecules, creates a damping force on the vibration, converting the vehicle's vibration energy into oil heat energy, which is then absorbed and dissipated into the atmosphere by the shock absorber. Shock absorbers are wear-prone components in automotive use. Their performance directly affects the vehicle's stability, comfort, and the lifespan of other components; therefore, shock absorbers should always be kept in good working order.

[0003] The damping effect of existing shock absorbers weakens after prolonged use. Furthermore, the required damping performance varies depending on the terrain; when encountering bumpy roads, the damping effect of the shock absorber springs is often limited. Summary of the Invention

[0004] The purpose of this invention is to provide a highly stable shock absorber, including a follower cylinder and elastic telescopic components at both ends. The position of the follower cylinder is controlled by a sliding lock mechanism to increase the elongation of the shock absorber when it extends and to release the retraction margin of the elastic telescopic components when the shock absorber is compressed, thereby further compressing it and enhancing the overall shock absorption effect and stability of the shock absorber.

[0005] To achieve the above-mentioned objectives, the present invention adopts the following technical solution:

[0006] The present invention provides a high-stability shock absorber, which is assembled between a first component and a second component that generate relative displacement in opposite directions or back directions. It has a first cylinder connected to the first component and a second cylinder connected to the second component, and the first cylinder and the second cylinder are coaxially assembled as a sealed and slidingly fitted sliding pair.

[0007] It also includes a follower cylinder that is mounted between the first cylinder body and the second cylinder body and slides freely. The follower cylinder is connected to the first cylinder body through a first elastic telescopic component, and the follower cylinder is connected to the second cylinder body through a second elastic telescopic component.

[0008] The follower cylinder slides through the combined action of the first elastic telescopic component and the second elastic telescopic component, and during the process of the second component moving towards or away from the first component, the follower cylinder slides in the direction of the displacement of the second component.

[0009] It also includes a sliding lock mechanism for controlling the sliding state of the follower cylinder, and the sliding lock mechanism:

[0010] When the load on the second cylinder suddenly decreases and it displaces away from the first cylinder, the follower cylinder is allowed to slide in the direction of the second cylinder's displacement.

[0011] When the second cylinder is subjected to a stable load, the position of the follower cylinder relative to the first cylinder is locked to limit the compression of the first elastic telescopic component.

[0012] When the load on the second cylinder suddenly increases and it moves toward the first cylinder, it is unlocked, causing the follower cylinder to slide in the direction of the displacement of the second cylinder.

[0013] As a preferred embodiment of the present invention, the first elastic telescopic component includes a first annular piston, a first spring and a third annular piston, the first annular piston being slidably engaged with the first cylinder body, and the two ends of the first spring being connected to the first annular piston and the third annular piston respectively. The second elastic telescopic component includes a second annular piston and a second spring, one end of the second spring being connected to the second annular piston and the other end being fixed inside the second cylinder body.

[0014] The follower cylinder has an upper annular cylinder and a lower annular cylinder that are connected to each other. The inner side of the upper annular cylinder is a sliding lock mounting cylinder for assembling a sliding lock mechanism, and the inner side of the lower annular cylinder is a transmission cylinder that is connected to the lower annular cylinder. The upper annular cylinder is slidably engaged with the third annular piston, and the lower annular cylinder is slidably engaged with the second annular piston. The transmission cylinder is equipped with a sliding cylinder that can slide into the sliding lock mounting cylinder. The transmission cylinder is also equipped with a transmission piston for pushing the sliding cylinder to slide, and the transmission piston is directly slidably engaged with the second cylinder body.

[0015] As a preferred embodiment of the present invention, a limiting part is also provided for limiting the longest and shortest sliding distance of the sliding cylinder.

[0016] As a preferred embodiment of the present invention, the sliding lock mechanism includes a sliding lock ring, a sliding lock assembly, a first limiting ring, a pressure adjusting spring, and a pressure adjusting spring ring groove, wherein...

[0017] The sliding lock ring is coaxially assembled to the end of the follower cylinder near the first cylinder body via a threaded structure, and the sliding lock ring has a sliding lock ring groove along its inner ring surface for assembling the sliding lock assembly.

[0018] The slide lock assembly includes a slide lock spring, a push ring, and a set of arc-shaped sliders arranged in a circular array. The arc-shaped sliders have a slidably fitted inclined structure with the slide lock ring groove, and the inclined structure is used to allow the arc-shaped sliders to slide radially out of the slide lock ring groove. The slide lock spring is assembled between the slide lock ring groove and the arc-shaped slider to provide a thrust that allows the arc-shaped sliders to slide out of the slide lock ring groove. The push ring is slidably assembled on the arc-shaped sliders to bear the thrust of the slide lock springs and distribute it to the arc-shaped sliders.

[0019] When a set of the arc-shaped sliders are pushed and slide out of the sliding lock ring groove in sync, they form an approximately closed circular shape;

[0020] The first limiting ring is threadedly fitted to one end of the follower cylinder near the first cylinder body and is used to limit the position of the sliding lock ring;

[0021] The pressure regulating spring ring groove is adjustablely mounted on the first cylinder body via a threaded structure, and the two ends of the pressure regulating spring are respectively fixed to the pressure regulating spring ring groove and the sliding lock ring.

[0022] As a preferred embodiment of the present invention, the first cylinder body has a limiting component and an unlocking fork that cooperate with the sliding lock mechanism, wherein,

[0023] The limiting component includes a sliding shaft disposed along the center of the first cylinder body toward the follower cylinder, and the sliding shaft is slidably engaged with the sliding lock ring;

[0024] The limiting component further includes a neck ring portion with an outer diameter smaller than that of the sliding shaft and coaxially connected to the sliding shaft, and an extension shaft with an outer diameter the same as that of the sliding shaft and coaxially connected to the neck ring portion. The neck ring portion has a right-angle transition surface connecting to the sliding shaft facing the first cylinder body and a rounded transition surface connecting to the extension shaft facing the follower cylinder. The side of the arc-shaped slider that slides out of the sliding lock ring groove has a stop surface facing the right-angle transition surface and a sliding slope facing the rounded transition surface.

[0025] This locks the sliding of the slip ring from the neck ring towards the first cylinder, while allowing it to slide freely from the neck ring towards the follower cylinder.

[0026] The unlocking fork includes an unlocking fork piston, a sliding bolt, and a spacer groove. The sliding bolts are arranged in a uniform circular array around the unlocking fork piston, and a spacer groove is left between adjacent sliding bolts.

[0027] The sliding shaft has a hollow sliding cavity. The unlocking fork piston part extends into the sliding cavity through its piston rod passing through the hollow extension shaft and the neck ring part. The extension shaft has a slot platform that slides with the spacer groove, and the extension shaft is provided with a relief groove corresponding to the sliding bolt.

[0028] As a preferred embodiment of the present invention, the sliding shaft, the neck ring, and the extension shaft are integrally formed or threadedly connected.

[0029] As a preferred embodiment of the present invention, the piston chamber where the first annular piston is located is connected to the sliding chamber, and a hydraulic oil injection port and a hydraulic oil return port are opened through the first cylinder body; the connecting part of the upper annular cylinder, the lower annular cylinder, the sliding cylinder and the transmission cylinder is also filled with hydraulic oil.

[0030] As a preferred embodiment of the present invention, the effective area of ​​the sliding cylinder is the same as the effective area of ​​the sliding cavity, and the effective area of ​​the second annular piston is greater than the effective areas of the first annular piston and the third annular piston.

[0031] As a preferred embodiment of the present invention, the first annular piston and the third annular piston have the same working area.

[0032] As a preferred embodiment of the present invention, both the first cylinder body and the lower annular cylinder end are provided with limiting end caps.

[0033] Compared with existing technologies, one or more of the above technical solutions have the following beneficial effects:

[0034] This invention can be applied to vehicle suspensions and includes a follower cylinder, a sliding lock mechanism, a first elastic telescopic component, and a second elastic telescopic component. The up-and-down movement of the follower cylinder adjusts the overall telescopic range of the shock absorber, thereby stabilizing the platform supported by the shock absorber and better handling of smooth roads and complex terrain. Specifically:

[0035] On smooth roads, the first and second elastic telescopic components are compressed simultaneously, and the follower cylinder locks them in the middle position of the shock absorber, working together to dampen minor undulations in the road surface to ensure good stability of the frame.

[0036] When a pothole suddenly appears on the road, the wheel drops abruptly, and the second elastic telescopic component pops out rapidly. At this time, the follower cylinder suddenly drops due to the pressure from the second elastic telescopic component, so the first elastic telescopic component presses down on the follower cylinder. The shock absorber is in an extended state, and its range of motion is greater than that of a normal shock absorber. After bottoming out and supporting the ground, the first cylinder sinks less, which is more conducive to maintaining the stability of the vehicle body.

[0037] When a bump appears on the road surface, the wheel is suddenly lifted. Due to the different spring compression times, the second elastic telescopic component instantly bears a greater load. The sliding lock mechanism can unlock the follower cylinder and further compress it toward the first cylinder. Compared with ordinary shock absorbers, the overall compression ratio of the shock absorber of the present invention is larger, so the longitudinal runout of the first component is smaller, which is more conducive to maintaining the stability of the platform supported by the shock absorber. Attached Figure Description

[0038] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0039] Figure 1 This is a schematic diagram illustrating the structural principle of a high-stability shock absorber according to the present invention.

[0040] Figure 2 yes Figure 1 A multi-view structural diagram of the first cylinder block.

[0041] Figure 3 This is a schematic diagram of the structure of the pressure regulating spring ring groove in this invention.

[0042] Figure 4 This is a schematic diagram of the structure of various springs in this invention.

[0043] Figure 5 This is a schematic diagram of the cooperation between the outer cylinder of the first cylinder and the outer cylinder of the second cylinder in this invention.

[0044] Figure 6 This is a schematic diagram of the unlocking fork in this invention.

[0045] Figure 7 This is a schematic diagram of the slide lock assembly in this invention.

[0046] Figure 8 This is a schematic diagram of the unlocking process of the unlocking fork in this invention.

[0047] Figure 9 This is a schematic diagram of the sliding lock assembly movement process in this invention.

[0048] Figure 10 This is a schematic diagram of the structure of a sliding lock ring in this invention.

[0049] Figure 11 This is a schematic diagram of the structure of a follower cylinder in this invention.

[0050] Figure 12 This is a diagram illustrating the dimensional fit relationships of the various components in this invention.

[0051] In the picture:

[0052] 100, First cylinder body; 200, Second cylinder body; 300, Follower cylinder; 400, First elastic telescopic component; 500, Second elastic telescopic component; 600, Sliding lock mechanism; 700, Limiting component; 800, Unlocking fork; 900, Limiting end cap.

[0053] 110. Outer cylinder of the first cylinder; 111. Limiting boss;

[0054] 210. Second cylinder outer cylinder; 211. Limiting recess;

[0055] 310. Upper annular cylinder; 311. Injection hole; 312. Return hole; 320. Lower annular cylinder; 330. Slide lock mounting cylinder; 340. Transmission cylinder; 341. Sliding cylinder; 342. Transmission piston; 343. Limiting part; 344. Transmission cylinder limiting cover.

[0056] 410. First annular piston; 411. Oil hole; 412. Injection port; 413. Return port; 420. First spring; 430. Third annular piston;

[0057] 510. Second annular piston; 520. Second spring;

[0058] 610, Slide lock ring; 611, Slide lock ring groove; 612, Pressure adjusting spring groove; 613, Slide lock spring groove; 614, Sliding surface; 615, Spacer rib; 620, Slide lock assembly; 621, Slide lock spring; 622, Push ring; 6221, Stop edge; 6222, Slide groove; 623, Arc-shaped slider; 6231, Inclined structure; 6232, Stop surface; 6233, Sliding inclined surface; 630, First limit ring; 640, Pressure adjusting spring; 650, Pressure adjusting spring ring groove; 651, Pressure adjusting spring ring groove housing; 652, Sealing ring;

[0059] 710, sliding shaft; 711, sliding cavity; 712, guide surface; 720, neck ring; 721, right-angle transition surface; 722, rounded corner transition surface; 730, extension shaft; 731, slot platform; 732, clearance groove; 733, second limiting ring; 734, third limiting ring.

[0060] 810. Unlocking fork piston part; 811. Piston rod; 820. Sliding bolt; 830. Spacer groove;

[0061] M-thread structure. Detailed Implementation

[0062] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0063] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this application described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0064] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0065] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0066] Furthermore, the terms "installation," "setup," "equipped with," "connection," "linking," and "socketing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; 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, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0067] like Figures 1-12 The invention describes a high-stability shock absorber, which is assembled between a first component and a second component that generate relative displacement in opposite directions or back directions. Taking the application of the shock absorber of the present invention in a car as an example, the first component is the car body or frame, and the second component can be a wheel. In this case, the shock absorber has a first cylinder 100 connected to the first component and a second cylinder 200 connected to the second component, and the first cylinder 100 and the second cylinder 200 are coaxially assembled as a sealed and slidingly fitted sliding pair.

[0068] Combination Figure 5As shown, the first cylinder body 100 includes a first cylinder body outer cylinder 110, and the second cylinder body 200 includes a second cylinder body outer cylinder 210. The bottom of the first cylinder body outer cylinder 110 has a limiting boss 111, and the bottom of the second cylinder body outer cylinder 210 has a limiting recess 211 that slides in contact with the limiting boss 111. Thus, the first cylinder body 100 and the second cylinder body 200 generate relative displacements towards or away from each other through the sliding fit relationship between the first cylinder body outer cylinder 110 and the second cylinder body outer cylinder 210.

[0069] like Figure 1 and Figure 11 As shown, it also includes a follower cylinder 300 that is assembled between the first cylinder body 100 and the second cylinder body 200 and can slide freely. The follower cylinder 300 is connected to the first cylinder body 100 through a first elastic telescopic component 400, and the follower cylinder 300 is connected to the second cylinder body 200 through a second elastic telescopic component 500.

[0070] The follower cylinder 300 slides through the combined action of the first elastic telescopic component 400 and the second elastic telescopic component 500. During the process of the second component moving towards or away from the first component, the follower cylinder 300 slides in the direction of the displacement of the second component.

[0071] When dealing with different road conditions, the wheels may be compressed and move closer to the vehicle body, or they may be suspended and move away from the vehicle body. The shock absorber as a whole will be in a state of extension and contraction. The greater the extension and contraction of the shock absorber, the more beneficial it is to maintain the stability of the vehicle body when dealing with road conditions. Based on this invention, the present invention adjusts the extension and contraction of the shock absorber as a whole by moving the follower cylinder 300 up and down to make the vehicle body more stable.

[0072] Meanwhile, in order to maintain stability during driving, the present invention also proposes a sliding lock mechanism 600 for controlling the sliding state of the follower cylinder 300, and the sliding lock mechanism 600:

[0073] When the load on the second cylinder 200 suddenly decreases and it displaces away from the first cylinder 100, the follower cylinder 300 is allowed to slide in the direction of the displacement of the second cylinder 200.

[0074] When the second cylinder 200 is subjected to a stable load, the position of the follower cylinder 300 relative to the first cylinder 100 is locked to limit the compression of the first elastic telescopic component 400.

[0075] When the load on the second cylinder 200 suddenly increases and it moves toward the first cylinder 100, it is unlocked, causing the follower cylinder 300 to slide in the direction of the displacement of the second cylinder 200.

[0076] The sliding lock mechanism 600 controls the shock absorber to extend and retract at appropriate times. In a smooth state, the follower cylinder 300 is in a neutral state and locked, preventing it from sliding further upward, thus maintaining a relatively stable extension and retraction range. When dealing with potholes, the first elastic extension component 400 and the second elastic extension component 500 extend simultaneously, effectively increasing the overall extension range of the shock absorber. When dealing with bumps, the follower cylinder 300 is unlocked, allowing it to slide further upward, thereby effectively increasing the overall contraction range of the shock absorber and contributing to maintaining the overall stability of the vehicle body.

[0077] More specifically, in this invention, the first elastic telescopic component 400 and the second elastic telescopic component 500 extend and retract through a spring / piston cooperation structure. The first elastic telescopic component 400 includes a first annular piston 410, a first spring 420, and a third annular piston 430. The first annular piston 410 is slidably engaged with the first cylinder 100. The two ends of the first spring 420 are respectively connected to the first annular piston 410 and the third annular piston 430. The second elastic telescopic component 500 includes a second annular piston 510 and a second spring 520. One end of the second spring 520 is connected to the second annular piston 510, and the other end is fixed inside the second cylinder 200.

[0078] Combination Figure 11 As shown, the follower cylinder 300 has an upper annular cylinder 310 and a lower annular cylinder 320 that are connected. The inner side of the upper annular cylinder 310 is a sliding lock mounting cylinder 330 for assembling the sliding lock mechanism 600, and the inner side of the lower annular cylinder 320 is a transmission cylinder 340 that is connected to the lower annular cylinder 320. The upper annular cylinder 310 is slidably engaged with the third annular piston 430, the lower annular cylinder 320 is slidably engaged with the second annular piston 510, and the transmission cylinder 340 is equipped with a sliding mechanism that allows for... The sliding cylinder 341 extends into the sliding lock mounting cylinder 330. The transmission cylinder 340 is also equipped with a transmission piston 342 for pushing the sliding cylinder 341 to slide. The transmission piston 342 is directly slidably engaged with the second cylinder body 200. Specifically, the transmission piston 342 transmits pressure through hydraulic oil to push the sliding cylinder 341 to slide. Furthermore, a transmission cylinder limiting cover 344 is provided at the bottom of the transmission cylinder 340 to limit the sliding position of the transmission piston 342, so as to prevent the transmission piston 342 from dislodging from the transmission cylinder 340.

[0079] Considering the magnitude of the force on the piston F = P × S (P: pressure, S: area of ​​force application), and because the pressures of the connected upper annular cylinder 310 and lower annular cylinder 320 are the same (e.g. Figure 1As shown, the pressure in chamber B3 is the same as that in chamber B2, which makes the pressure on the second annular piston 510 greater than that on the third annular piston 430. Since the third annular piston 430 and the first annular piston 410 are located at the two ends of the first spring 420 and have the same piston area, it can be seen that the hydraulic oil pressure of the first cylinder 100 and the follower cylinder 300 tends to be the same (i.e., the pressure in chamber A3 tends to be the same as that in chamber B3). Furthermore, by setting the elastic coefficient of the second spring 520 to be equivalent to that of the first spring 420, the compression of the second spring 520 can be greater than that of the first spring 420.

[0080] In order to limit the sliding stroke of the sliding cylinder 341, a limiting part 343 is also provided to limit the longest and shortest sliding distance of the sliding cylinder 341.

[0081] As a specific mechanism for realizing the locking function of the follower cylinder 300, the sliding lock mechanism 600 includes a sliding lock ring 610, a sliding lock assembly 620, a first limit ring 630, a pressure adjusting spring 640, and a pressure adjusting spring ring groove 650.

[0082] Therefore, on a smooth road surface and with the vehicle body under load, the follower cylinder 300 is in the state analyzed above. It is simultaneously subjected to the elastic forces of the first spring 420, the second spring 520, and the adjusting spring 640. Due to the difference in piston area, the compression of the second spring 520 is greater than that of the first spring 420, and the elastic force of the second spring 520 is greater than the combined force of the first spring 420 and the adjusting spring 640. As a result, the thrust of the second elastic telescopic component 500 is greater, pushing the follower cylinder 300 to slide upward until its position is locked by the sliding lock mechanism 600. This state is referred to below as the "neutral state" of the follower cylinder 300.

[0083] Combination Figure 1 , Figure 7 and Figure 10 As shown, the sliding lock ring 610 is coaxially assembled to the end of the follower cylinder 300 near the first cylinder body 100 via a threaded structure, and the sliding lock ring 610 has a sliding lock ring groove 611 for assembling the sliding lock assembly 620 along its inner ring surface.

[0084] The slide lock assembly 620 includes a slide lock spring 621, a push ring 622, and a set of arc-shaped sliders 623 arranged in a ring array. The arc-shaped sliders 623 and the slide lock ring groove 611 have a slidably fitted inclined surface structure 6231, and the inclined surface structure 6231 is used to allow the arc-shaped sliders 623 to slide radially out of the slide lock ring groove 611. The slide lock spring 621 is assembled between the slide lock ring groove 611 and the arc-shaped sliders 623 to provide a thrust for the arc-shaped sliders 623 to slide out of the slide lock ring groove 611. The push ring 622 is slidably assembled on the arc-shaped sliders 623 to bear the thrust of the slide lock spring 621 and distribute it to the arc-shaped sliders 623.

[0085] When a set of the arc-shaped sliders 623 are pushed and slide out of the sliding lock ring groove 611 in a synchronized manner, they form an approximately closed ring shape;

[0086] The first limiting ring 630 is threadedly fitted to one end of the follower cylinder 300 near the first cylinder body 100 and is used to limit the position of the sliding lock ring 610;

[0087] The pressure regulating spring ring groove 650 is adjustablely mounted on the first cylinder body 100 via a threaded structure, and the two ends of the pressure regulating spring 640 are respectively fixed to the pressure regulating spring ring groove 650 and the sliding lock ring 610.

[0088] Correspondingly, the first cylinder 100 has a limiting component 700 and an unlocking fork 800 that cooperate with the sliding lock mechanism 600, wherein,

[0089] Combination Figure 2 As shown, the limiting component 700 includes a sliding shaft 710 disposed along the center of the first cylinder body 100 toward the follower cylinder 300, and the sliding shaft 710 is slidably engaged with the sliding lock ring 610.

[0090] The limiting component 700 further includes a neck ring portion 720 with an outer diameter smaller than that of the sliding shaft 710 and coaxially connected to the sliding shaft 710, and an extension shaft 730 with an outer diameter the same as that of the sliding shaft 710 and coaxially connected to the neck ring portion 720. The neck ring portion 720 has a right-angle transition surface 721 connecting to the sliding shaft 710 facing the first cylinder body 100, and a rounded transition surface 722 connecting to the extension shaft 730 facing the follower cylinder 300. The side of the arc-shaped slider 623 that slides out of the sliding lock ring groove 611 has a stop surface 6232 facing the right-angle transition surface 721 and a sliding inclined surface 6233 facing the rounded transition surface 722. The arc-shaped slider 623 also has an arc-shaped slider sliding surface that slides with the neck ring portion 720 between the stop surface 6232 and the sliding inclined surface 6233.

[0091] This locks the sliding of the slip ring 610 from the neck ring portion 720 toward the first cylinder body 100, while allowing it to slide freely from the neck ring portion 720 toward the follower cylinder 300.

[0092] With the cooperation of the aforementioned sliding lock assembly 620 and sliding lock ring 610, when the sliding lock ring 610 slides to the neck ring 720, a set of the arc-shaped sliders 623 (such as...) Figure 7 As shown, a specific group (including 6 blocks) is pushed by the sliding lock spring 621 and slides out of the sliding lock ring groove 611 to form an approximately closed ring shape. This is the "neutral state" of the follower cylinder 300 mentioned above.

[0093] like Figure 6As shown, the unlocking fork 800 includes an unlocking fork piston part 810, a sliding bolt 820 and a spacer groove 830. The sliding bolts 820 are arranged in a uniform circular array around the unlocking fork piston part 810, and a spacer groove 830 is left between adjacent sliding bolts 820.

[0094] The sliding shaft 710 has a hollow sliding cavity 711. The unlocking fork piston part 810 extends into the sliding cavity 711 through the hollow extension shaft 730 and the neck ring part 720 via its piston rod 811. The extension shaft 730 and the neck ring part 720 have a slot platform 731 that slides with the spacer groove 830, and the extension shaft 730 and the neck ring part 720 are provided with a relief groove 732 corresponding to the sliding bolt 820.

[0095] like Figure 2 As shown, the sliding shaft 710 also has a guide surface 712 for guiding the sliding bolt 820 to slide, that is, the relief groove 732 is on the bottom surface of the sliding shaft 710 pointing in the axial direction. The sliding bolt 820 is attached to the guide surface 712 and can move on the guide surface 712, which helps the sliding bolt 820 to move and also positions the unlocking fork 800.

[0096] like Figure 1 As shown, in this "neutral state," the pressures of cavities B1, B2, B3, A3, A2, and A1 tend to be consistent, and since cavity C1 connects to cavity B1, their pressures also remain comparable. Therefore, the pressures of cavity C1 and cavity A1 are also comparable. C1 is the inner cavity of the sliding cylinder 341. Pressure is applied to the sliding cylinder 341 through surface S13, causing the sliding cylinder 341 to slide upward. Cavity A1 is the sliding cavity 711. Surface S9 is the piston surface of the unlocking fork piston part 810. By keeping the areas of S9 and S13 consistent, the sliding cylinder 341 and the unlocking fork 800 can be effectively kept in balance, preventing the unlocking fork 800 from arbitrarily unlocking the sliding lock assembly 620 in the "neutral state."

[0097] It is worth noting that the neck ring 720 has sufficient length to accommodate slight slippage between the sliding cylinder 341 and the unlocking fork 800 caused by fluctuations in hydraulic oil pressure, thereby ensuring the stability of the invention in a "neutral state". The unlocking fork 800 will only unlock when the hydraulic oil pressure suddenly increases and reaches a set threshold.

[0098] When the unlocking fork 800 slides toward the first cylinder 100, as Figures 8-9 As shown, the sliding bolt 820 will squeeze the arc-shaped slider 623, causing a set of arc-shaped sliders 623 that close and cover the neck ring 720 to be squeezed back into the sliding lock ring groove 611, and the sliding lock ring 610 is also unlocked and continues to slide along the sliding shaft 710 toward the first cylinder 100.

[0099] The front end of the sliding bolt 820 also adopts a rounded corner structure so that when the arc-shaped slider 623 is squeezed, the sliding inclined surface 6233 of the arc-shaped slider 623 is squeezed, so that the arc-shaped slider 623 can be smoothly disengaged. At the same time, the inclined surface structure 6231 of the arc-shaped slider 623 and the sliding lock ring groove 611 with sliding fit also makes it easier for the arc-shaped slider 623 to slide into and out of the sliding lock ring groove 611, which is conducive to ensuring the durability and smoothness of the shock absorber.

[0100] It is worth noting that the stop surface 6232 of the arc-shaped slider 623 and the right-angle transition surface 721 are each provided with a chamfer, which makes the arc-shaped slider 623 disengage more smoothly from the neck ring 720.

[0101] In addition, combined Figure 7 and Figure 9 As shown, the arc-shaped slider 623 is provided with a groove 6222 adapted to the position of the push ring 622. The arc-shaped slider 623 is provided with stop edges 6221 on both sides of the push ring 622 to form the groove, so as to limit the relative movement between the push ring 622 and the arc-shaped slider 623. Because the radial position of the push ring 622 remains fixed during the process of the arc-shaped slider 623 sliding into and out of the sliding lock ring groove 611, it is not difficult to find that the sliding distance of the groove is actually equivalent to the radial displacement distance of the arc-shaped slider 623.

[0102] It is worth noting that the effective area of ​​the second annular piston 510 is larger than that of the first annular piston 410 and the third annular piston 430. Furthermore, the effective areas of the first annular piston 410 and the third annular piston 430 are the same, which is beneficial to the pressure balance between the unlocking fork 800 and the sliding cylinder 341.

[0103] In the above structure, the effective area of ​​the sliding cylinder 341 is the same as that of the sliding cavity 711. As can be seen from the previous text, in the neutral state of the follower cylinder, the hydraulic oil pressure of the first cylinder 100 and the follower cylinder 300 tends to be the same, that is, the pressure of the sliding cylinder 341 is the same as the pressure of the sliding cavity 711. Therefore, the thrust of the sliding cylinder 341 is also basically the same as the pressure of the unlocking fork piston 810.

[0104] In addition, a second limiting ring 733 is provided on the inner side of the extension shaft 730 for positioning the lowest position of the unlocking fork 800. The second limiting ring 733 can adjust its height in the extension shaft 730 through a threaded structure, thereby limiting the unlocking fork piston part 810.

[0105] A third limiting ring 734 is also fitted on the outer side of the bottom of the extension shaft 730 via a threaded structure. The third limiting ring 734 is used to limit the maximum distance that the sliding lock ring 610 slides toward the second cylinder 200.

[0106] In this invention, the sliding shaft 710, the neck ring 720, and the extension shaft 730 are integrally formed or threadedly connected.

[0107] In this invention, the piston chamber where the first annular piston 410 is located is connected to the sliding chamber 711, and is also connected through the oil hole 411 in the first cylinder 100, such as... Figure 2 As shown, the piston chamber where the first annular piston 410 is located is marked A3, the pressure regulating spring ring groove 650 is assembled in the A2 chamber, the sliding chamber 711 is marked A1, A1, A2 and A3 are interconnected, the internal pressure tends to be consistent, and the A1 chamber has a hydraulic oil injection port 412 and a return port 413.

[0108] The connecting portion of the upper annular cylinder 310, the lower annular cylinder 320, the sliding cylinder 341, and the transmission cylinder 340 is also filled with hydraulic oil, and as... Figure 11 As shown, the lower annular cylinder 310 has a B3 chamber, the lower annular cylinder 320 has a B2 chamber, and the transmission cylinder 340 has a B1 chamber. The B1, B2, and B3 chambers are connected through an oil hole 411, and their internal pressure tends to be consistent. They are also provided with an injection hole 311 and a return hole 312.

[0109] In this invention, both the first cylinder body 100 and the lower annular cylinder 320 are provided with limiting end caps 900.

[0110] In some embodiments of the present invention, such as Figure 3 As shown, the pressure regulating spring ring groove 650 is formed on the pressure regulating spring ring groove housing 651. A sealing ring is also provided on the side facing the A2 cavity to seal the A2 cavity. At the same time, the pressure regulating spring ring groove 650 is used to assemble the pressure regulating spring 640, and threaded structures are provided on both the inner and outer sides of the pressure regulating spring ring groove housing 651 to facilitate installation.

[0111] In some embodiments of the present invention, the sliding locking ring 610 is constructed as follows: Figure 10 As shown, the pressure regulating spring 640 has a pressure regulating spring groove 612, the sliding lock spring 621 has a sliding lock spring groove 613 inside its sliding lock ring groove 611, the sliding shaft 710 and the extension shaft 730 have a sliding surface 614, and the gap of the arc-shaped slider 623 has a spacer rib 615. The spacer rib 615 and the inclined surface structure 6231 of the sliding lock ring groove 611 together guide and separate the sliding of the arc-shaped slider 623, making the movement of the sliding lock ring 610 more stable and smooth.

[0112] The working process of this invention is as follows:

[0113] When the road surface is flat and the vehicle is driving stably, the high-stability shock absorber in this invention is in the neutral state described above, which will not be repeated here.

[0114] When a pothole appears on the road surface, the wheel is momentarily suspended in the air. The compression of the second spring 520 is abruptly released downwards, followed by the release of pressure from the first spring 420. This results in the shock absorber rapidly extending and bottoming out, before returning to the neutral state of the follower cylinder 300 under pressure. During this process, the rapid downward ejection of the second cylinder 200 is crucial. Therefore, the transmission piston 342 directly slides against the second cylinder 200, facilitating its timely disengagement and allowing the wheel to touch the ground.

[0115] At this time, the slide lock assembly 620 will automatically unlock under the action of the adjusting spring 640 (see...). Figure 9 This causes the slip ring 610 to drive the follower cylinder 300 downward along the extension shaft 730. This allows the shock absorber to extend to its maximum extent, ensuring stable tire contact with the ground when encountering deep potholes.

[0116] When a bump appears on the road surface, the wheel is instantly subjected to significant compression, which is transmitted to the second cylinder 200. When this compression force is applied to the second annular piston 510, the hydraulic oil simultaneously compresses the transmission cylinder 340 and the third annular piston 430. Since the first spring 420 takes time to transmit pressure, it will lag behind the transmission cylinder 340 in directly acting on the sliding cylinder 341. Therefore, the thrust of the sliding cylinder 341 is instantaneously much greater than the pressure of the unlocking fork piston 810. As a result, the unlocking fork piston 810 is pushed upward by the sliding cylinder 341, thereby squeezing the arc-shaped slider 623 back into the sliding lock ring groove 611 through the sliding bolt 820, achieving the purpose of unlocking. The follower cylinder 300 then continues to move upward to further compress the uncompressed amount of the first spring 420, so that the shock absorber as a whole has a greater amount of recoil when dealing with bumps, ensuring that the main body of the vehicle remains stable.

[0117] Combination Figure 12 As shown in the diagram, this invention also lists some key dimensional fit relationships. Those skilled in the art should be able to derive these relationships after understanding the working principle and process of this invention. However, to more fully demonstrate the stability of the working process of this invention and to facilitate understanding of the specific details of this invention, the following descriptions are provided:

[0118] (1) L1 can adjust the limit elongation of the second cylinder 200 (i.e. the limit elongation of the shock absorber), and L2 > L1, to prevent the transmission piston 342 from coming out of the transmission cylinder 340.

[0119] (2) L5 determines the pressurization time and pressure of the A1 chamber during the initial compression of the shock absorber. The presence of L5 is beneficial for the unlocking fork 800 to be in the lowest position and for the pressure balance between the unlocking fork 800 and the sliding cylinder 341. By adjusting L6, the contact timing between the sliding cylinder 341 and the unlocking fork 800 can be adjusted when the follower cylinder 300 moves upward.

[0120] (3) There are two ways to adjust the ultimate compression between the follower cylinder 300 and the second cylinder 200. One is to adjust the elastic modulus of the second spring 520 to adjust the compression of the second spring 520; the other is to adjust L3.

[0121] (4) L7 determines the buffer distance when the sliding lock ring 610 moves downward inertial motion in the neutral position. L7 helps to reduce the impact between the sliding lock ring 610 and the third limiting ring 734.

[0122] (5) L8 determines the timing when the arc-shaped slider 623 enters the neck ring 720, that is, the timing when the follower cylinder 300 is locked.

[0123] (6) There are two methods to adjust the ultimate compression between the follower cylinder 300 and the first cylinder 100. One is to adjust the elastic modulus of the pressure regulating spring 640 and the first spring 420, thereby adjusting the compression of the pressure regulating spring 640 and the first spring 420; the other is to adjust L4.

[0124] All the threaded designs and components that mate with the threads in this article serve not only to connect and fix, but also to assemble the components together, so that the shock absorber as a whole can be assembled smoothly.

[0125] The structural dimensions, threaded component position, and spring elastic modulus of the shock absorber can be adjusted as needed to adapt to the installation requirements of different sized spaces. The neutral position of the shock absorber, i.e., the locked position, can be set by adjusting the spring modulus or corresponding structural dimensions according to the required load size and variation range of the shock absorber, in order to adapt to different load requirements.

[0126] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A high-stability shock absorber, assembled between a first component and a second component that generate relative displacement in opposite or opposite directions, characterized in that, It has a first cylinder connected to the first component and a second cylinder connected to the second component, and the first cylinder and the second cylinder are coaxially assembled as a sealed and slidingly fitted sliding pair; It also includes a follower cylinder that is mounted between the first cylinder body and the second cylinder body and slides freely. The follower cylinder is connected to the first cylinder body through a first elastic telescopic component, and the follower cylinder is connected to the second cylinder body through a second elastic telescopic component. The follower cylinder slides through the combined action of the first elastic telescopic component and the second elastic telescopic component, and during the process of the second component moving towards or away from the first component, the follower cylinder slides in the direction of the displacement of the second component. It also includes a sliding lock mechanism for controlling the sliding state of the follower cylinder, and the sliding lock mechanism: When the load on the second cylinder suddenly decreases and it displaces away from the first cylinder, the follower cylinder is allowed to slide in the direction of the displacement of the second component. When the second cylinder is subjected to a stable load, the position of the follower cylinder relative to the first cylinder is locked to limit the compression of the first elastic telescopic component. When the load on the second cylinder suddenly increases and it moves toward the first cylinder, it is unlocked, allowing the follower cylinder to slide in the direction of the displacement of the second cylinder. The first elastic telescopic component includes a first annular piston, a first spring, and a third annular piston. The first annular piston is slidably engaged with the first cylinder body. The two ends of the first spring are respectively connected to the first annular piston and the third annular piston. The second elastic telescopic component includes a second annular piston and a second spring. One end of the second spring is connected to the second annular piston, and the other end is fixed inside the second cylinder body. The follower cylinder has an upper annular cylinder and a lower annular cylinder that are connected to each other. The inner side of the upper annular cylinder is a sliding lock mounting cylinder for assembling a sliding lock mechanism, and the inner side of the lower annular cylinder is a transmission cylinder that is connected to the lower annular cylinder. The upper annular cylinder is slidably engaged with the third annular piston, and the lower annular cylinder is slidably engaged with the second annular piston. The transmission cylinder is equipped with a sliding cylinder that can slide into the sliding lock mounting cylinder. The transmission cylinder is also equipped with a transmission piston for pushing the sliding cylinder to slide, and the transmission piston is directly slidably engaged with the second cylinder body. The sliding lock mechanism includes a sliding lock ring, a sliding lock assembly, a first limiting ring, a pressure adjusting spring, and a pressure adjusting spring ring groove, wherein... The sliding lock ring is coaxially assembled to the end of the follower cylinder near the first cylinder body via a threaded structure, and the sliding lock ring has a sliding lock ring groove along its inner ring surface for assembling the sliding lock assembly. The slide lock assembly includes a slide lock spring, a push ring, and a set of arc-shaped sliders arranged in a circular array. The arc-shaped sliders have a slidably fitted inclined structure with the slide lock ring groove, and the inclined structure is used to allow the arc-shaped sliders to slide radially out of the slide lock ring groove. The slide lock spring is assembled between the slide lock ring groove and the arc-shaped slider to provide a thrust that allows the arc-shaped sliders to slide out of the slide lock ring groove. The push ring is slidably assembled on the arc-shaped sliders to bear the thrust of the slide lock springs and distribute it to the arc-shaped sliders. When a set of the arc-shaped sliders are pushed and slide out of the sliding lock ring groove in sync, they form an approximately closed circular shape; The first limiting ring is threadedly fitted to one end of the follower cylinder near the first cylinder body and is used to limit the position of the sliding lock ring; The pressure regulating spring ring groove is adjustablely mounted on the first cylinder body via a threaded structure, and the two ends of the pressure regulating spring are respectively fixed to the pressure regulating spring ring groove and the sliding lock ring.

2. The high-stability shock absorber according to claim 1, characterized in that, It also has a limiting part for limiting the longest and shortest sliding distance of the sliding cylinder.

3. The high-stability shock absorber according to claim 1, characterized in that, The first cylinder has a limiting component and an unlocking fork that cooperate with the sliding lock mechanism, wherein, The limiting component includes a sliding shaft disposed along the center of the first cylinder body toward the follower cylinder, and the sliding shaft is slidably engaged with the sliding lock ring; The limiting component further includes a neck ring portion with an outer diameter smaller than that of the sliding shaft and coaxially connected to the sliding shaft, and an extension shaft with an outer diameter the same as that of the sliding shaft and coaxially connected to the neck ring portion. The neck ring portion has a right-angle transition surface connecting to the sliding shaft facing the first cylinder body and a rounded transition surface connecting to the extension shaft facing the follower cylinder. The side of the arc-shaped slider that slides out of the sliding lock ring groove has a stop surface facing the right-angle transition surface and a sliding slope facing the rounded transition surface. This locks the sliding of the slip ring from the neck ring towards the first cylinder, while allowing it to slide freely from the neck ring towards the follower cylinder. The unlocking fork includes an unlocking fork piston, a sliding bolt, and a spacer groove. The sliding bolts are arranged in a uniform circular array around the unlocking fork piston, and a spacer groove is left between adjacent sliding bolts. The sliding shaft has a hollow sliding cavity. The unlocking fork piston part extends into the sliding cavity through its piston rod passing through the hollow extension shaft and the neck ring part. The extension shaft has a slot platform that slides with the spacer groove, and the extension shaft is provided with a relief groove corresponding to the sliding bolt.

4. The high-stability shock absorber according to claim 3, characterized in that, The sliding shaft, neck ring, and extension shaft are integrally formed or threadedly connected.

5. The high-stability shock absorber according to claim 3, characterized in that, The piston chamber where the first annular piston is located is connected to the sliding chamber, and a hydraulic oil injection port and a hydraulic oil return port are opened through the first cylinder body; the connecting part of the upper annular cylinder, the lower annular cylinder, the sliding cylinder and the transmission cylinder are also filled with hydraulic oil.

6. The high-stability shock absorber according to claim 5, characterized in that, The effective area of ​​the sliding cylinder is the same as the effective area of ​​the sliding cavity, and the effective area of ​​the second annular piston is greater than the effective areas of the first annular piston and the third annular piston.

7. The high-stability shock absorber according to claim 6, characterized in that, The first annular piston and the third annular piston have the same working area.

8. The high-stability shock absorber according to claim 1, characterized in that, The first cylinder body and the lower annular cylinder end are both provided with limiting end caps.

Images