A valve device with adjustable compression damping

Abstract

The present invention relates to a valve device with adjustable compression damping, comprising a valve seat, a valve sleeve, a valve body, a valve stem, a low-pressure valve pin, a high-pressure valve pin and a sliding valve assembly, wherein the valve sleeve side wall is provided with a plurality of flow guide holes in a circumferential array, the low-pressure valve pin and the high-pressure valve pin are both provided on the upper part of the valve seat through axial sliding of a spring, the upper part of the low-pressure valve pin and the upper part of the high-pressure valve pin are both provided with flow guide holes, and the sliding valve assembly is located in the sliding valve cavity; a shock absorber group for resisting vehicle rollover, comprising two shock absorbers, wherein the shock absorber comprises an oil storage cylinder, a working cylinder, an intermediate cylinder and a valve device. The purpose of the present invention is to solve or at least alleviate the problem that the traditional compression valve relies on an electronic control system and a sensor, has a high product cost and a low system reliability, and to provide a valve device with adjustable compression damping.

Description

Technical Field

[0001] The invention relates to the technical field of shock absorbers, and in particular to a valve device with adjustable compression damping. Background Art

[0002] The double-tube hydraulic shock absorber compression valve system commonly seen in the market is generally composed of a compensation valve and a compression valve. When the shock absorber is in the compression stroke, the oil can only flow out through the flow valve and the compression valve to generate damping force. The compression valve structure, manufacturing and assembly process are relatively simple and have become the mainstream of the current hydraulic shock absorber valve system, but its shortcomings are also obvious. The singleness of its oil channel also determines that the compression damping force value of this structure cannot be adjusted after the shock absorber is assembled, thereby failing to take into account both the comfort and handling of the vehicle.

[0003] Currently, the shock absorbers with adjustable compression damping on the market are mainly active or semi-active electronically controlled shock absorbers, such as the widely used solenoid valve shock absorbers and magnetorheological shock absorbers. However, the adjustment of the compression damping force of the semi-active or active shock absorbers depends on the electronic control system and sensors, which on the one hand greatly increases the product cost and on the other hand reduces the system reliability. Summary of the invention

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art, solve or at least alleviate the problems of traditional compression valves relying on electronic control systems and sensors, high product costs and low system reliability, and provide a valve device with adjustable compression damping.

[0005] The present invention is realized by the following technical scheme: a valve device with adjustable compression damping, comprising a valve seat, a valve sleeve, a valve body, a valve stem, a low-pressure valve pin, a high-pressure valve pin and a sliding valve assembly, wherein the valve sleeve is in a circular tubular shape, the valve body and the valve seat are respectively located at the upper and lower ends of the valve sleeve, and the valve stem used for fastening the valve seat, the valve sleeve and the valve body as one body passes through the valve body from top to bottom and is threadedly sleeved on the valve seat;

[0006] The valve body is provided with a low-pressure valve hole and a high-pressure valve hole, and the outer wall of the valve body is sealed and connected with the inner wall of the valve sleeve;

[0007] A boss is arranged on the upper part of the valve seat, the boss is sleeved in the valve sleeve and is longitudinally provided with a first countersunk hole, the upper surface of the boss is sealed and affixed to the lower surface of the valve body, a second countersunk hole is radially arranged on the lower part of the valve seat, the second countersunk hole is correspondingly arranged below the first countersunk hole, the outer wall of the lower part of the valve seat is sealed and connected to the inner wall of the valve sleeve, the space formed in the first countersunk hole is the low-pressure valve cavity, the space between the boss and the valve sleeve is the high-pressure valve cavity, the space formed in the second countersunk hole is the sliding valve cavity, the sliding valve cavity is connected to the low-pressure valve cavity and the high-pressure valve cavity through the low-pressure connecting hole and the high-pressure connecting hole respectively, the inner end of the sliding valve cavity is closed, and the outer end is connected to the outside of the valve sleeve;

[0008] The valve sleeve side wall is provided with a plurality of guide holes in a circumferential array, wherein the lower ends of the guide holes are connected to the high-pressure valve cavity, and the upper ends of the guide holes are connected to the outer side of the upper end of the valve sleeve;

[0009] The low-pressure valve pin and the high-pressure valve pin are both axially slidably arranged on the upper part of the valve seat through a spring, the low-pressure valve pin and the high-pressure valve pin are respectively located in the low-pressure valve cavity and the high-pressure valve cavity, the upper part of the low-pressure valve pin and the upper part of the high-pressure valve pin are respectively sealed and slidably arranged in the low-pressure valve hole and the high-pressure valve hole, and the upper part of the low-pressure valve pin and the upper part of the high-pressure valve pin are both provided with drainage holes;

[0010] The slide valve assembly is located in the slide valve cavity, and the slide valve assembly is used to control the opening and closing of the low-pressure connecting hole.

[0011] In order to further realize the present invention, the following technical solutions may be preferably selected:

[0012] Preferably, the valve stem is also fitted with a limiter, a gasket and a compensating valve plate, which are stacked in sequence from top to bottom on top of the valve body, and the valve body is provided with a plurality of compensating holes, which are located below the compensating valve plate.

[0013] Preferably, a positioning mechanism is arranged between the valve body and the valve seat, and the positioning mechanism includes an upper positioning countersunk hole, a lower positioning countersunk hole and a positioning pin. The upper positioning countersunk hole and the lower positioning countersunk hole are respectively located on the lower side of the valve body and the upper side of the boss. The upper part of the positioning pin is located in the upper positioning countersunk hole, and the lower part is located in the lower positioning countersunk hole.

[0014] Preferably, the drainage hole on the upper part of the low-pressure valve pin or the high-pressure valve pin includes a vertical section and a horizontal section, the upper end of the vertical section is connected to the upper end surface of the low-pressure valve pin or the high-pressure valve pin, the lower end is connected to the inner end of the horizontal section, and the outer end of the horizontal section is connected to the side wall of the low-pressure valve pin or the high-pressure valve pin.

[0015] Preferably, the sliding valve assembly includes a sliding valve sleeve and a sliding valve core, the sliding valve sleeve is fixedly arranged in the sliding valve cavity, the outer circumferential side of the sliding valve sleeve is stepped, the higher end of the outer side of the sliding valve sleeve is sealed and fixedly connected to the sliding valve cavity, the lower end of the outer side of the sliding valve sleeve is arranged correspondingly at the connecting point between the low-pressure connecting hole and the sliding valve cavity and a through hole is radially arranged, the sliding valve core is slidably arranged in the sliding valve sleeve, and a spring is arranged between the end of the sliding valve core facing the inner end of the sliding valve cavity and the inner end of the sliding valve cavity.

[0016] A shock absorber group for resisting vehicle rollover comprises two shock absorbers, wherein the shock absorber comprises an oil storage cylinder, a working cylinder, an intermediate cylinder and a valve device, wherein the inner wall of the oil storage cylinder is sealedly connected to the outer wall of a valve sleeve, the lower end of the working cylinder abuts against the valve sleeve and the outer wall of the working cylinder is sealedly connected to the inner wall of the valve sleeve, the intermediate cylinder is coaxially sleeved on the working cylinder and the lower end face of the intermediate cylinder is sealedly attached to the upper end face of the valve sleeve, and the upper end of the guide hole is located between the intermediate cylinder and the oil storage cylinder.

[0017] Preferably, the valve sleeve is provided with a plurality of interactive holes in a circumferential array, the upper ends of the interactive holes are connected to the upper end surface of the valve sleeve and are located between the working cylinder and the intermediate cylinder, and the lower ends of the interactive holes are connected to the outer side of the valve sleeve side wall.

[0018] Preferably, the lower end of the mutual hole of the valve sleeve of the valve device of one of the shock absorbers and the outer end of the sliding valve cavity are respectively connected to the outer end of the sliding valve cavity and the lower end of the mutual hole of the valve sleeve of the valve device of another shock absorber.

[0019] Through the above technical solution, the beneficial effects of the present invention are:

[0020] Compared with traditional shock absorbers, the compression valve oil flow channel of the present invention has a low-pressure valve channel and a high-pressure valve channel during the compression stroke. When the shock absorber runs at a low speed, its low-pressure valve channel is opened and the high-pressure valve channel is closed. However, when the wheel is impacted and the shock absorber runs at a high speed, the high-pressure valve is also opened. While protecting the shock absorber, it can also reduce the high-speed damping force, reduce the impact on the vehicle body and passengers, and improve the comfort of the whole vehicle.

[0021] Compared with traditional shock absorbers, the present invention can control the flow rate of the low-pressure connecting hole through a sliding valve, thereby adjusting the compression damping force, and control the flow rate of the low-pressure connecting hole by controlling the sliding of the sliding valve core to change the compression damping force. The power source for controlling the sliding valve core can be a central control oil pump.

[0022] The shock absorbers using the valve device of the present invention can be two mutually connected ones. When the shock absorber is in the extension stroke, the oil can enter the middle cylinder through the hole in the upper chamber of the working cylinder, and then flow to the sliding valve chamber of the other shock absorber through the interactive hole, thereby controlling the opening and closing of the low-pressure connecting hole to achieve the effect of increasing the compression damping force of the other shock absorber by stretching this shock absorber, thereby improving the vehicle's anti-roll ability, eliminating the stabilizer bar, and reducing the cost and weight of the entire vehicle.

[0023] The present invention can realize adaptive adjustment of compression damping force directly through three oil pipes in the passive suspension without the need for electronically controlled suspension control, and is therefore superior to existing solenoid valve shock absorbers, magnetorheological shock absorbers, and the like in terms of price. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a structural cross-sectional view of the valve device of the present invention;

[0025] Figure 2 It is a structural exploded diagram of the valve device of the present invention;

[0026] Figure 3 It is a structural cross-sectional view of the valve sleeve of the present invention;

[0027] Figure 4 It is a structural schematic diagram of the valve body of the present invention;

[0028] Figure 5 It is a structural schematic diagram of the valve seat of the present invention;

[0029] Figure 6 This is one of the structural cross-sectional views of the valve seat of the present invention;

[0030] Figure 7 This is the second structural cross-sectional view of the valve seat of the present invention;

[0031] Figure 8 It is a structural cross-sectional view of the low-pressure valve pin of the present invention;

[0032] Fig. 9 It is a structural cross-sectional view of the high-pressure valve pin of the present invention;

[0033] Fig.10 It is a structural schematic diagram of the slide valve assembly of the present invention;

[0034] Fig.11 It is a schematic structural diagram of the shock absorber of the present invention;

[0035] Among them: 1-valve seat; 2-valve sleeve; 3-valve body; 4-valve stem; 5-low-pressure valve pin; 6-high-pressure valve pin; 7-boss; 8-sliding valve sleeve; 9-sliding valve core; 10-limiter; 11-gasket; 12-compensating valve plate; 13-locating pin; 14-oil storage cylinder; 15-working cylinder; 16-intermediate cylinder; 17-low-pressure valve hole; 18-high-pressure valve hole; 19-low-pressure valve cavity; 20-high-pressure valve cavity; 21-sliding valve cavity; 22-low-pressure connecting hole; 23-high-pressure connecting hole; 24-guide hole; 25-guide hole; 26-compensating hole; 27-interactive hole. DETAILED DESCRIPTION

[0036] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] The following will be combined with the drawings in the embodiments of the invention to clearly and completely describe the technical solutions in the embodiments of the invention. Obviously, the described embodiments are only part of the embodiments of the invention, not all of the embodiments. Based on the embodiments of the invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the invention.

[0038] Embodiment 1:

[0039] like Figure 1-11 As shown, a valve device with adjustable compression damping comprises a valve seat 1, a valve sleeve 2, a valve body 3, a valve stem 4, a low-pressure valve pin 5, a high-pressure valve pin 6 and a sliding valve assembly, wherein the valve sleeve 2 is in a round tube shape, the valve body 3 and the valve seat 1 are respectively located at the upper and lower ends of the valve sleeve 2, and the valve stem 4 used for fastening the valve seat 1, the valve sleeve 2 and the valve body 3 as one body passes through the valve body 3 from top to bottom and is threadedly sleeved on the valve seat 1;

[0040] The valve body 3 is provided with a low-pressure valve hole 17 and a high-pressure valve hole 18, and the outer wall of the valve body 3 is sealedly connected with the inner wall of the valve sleeve 2;

[0041] A boss 7 is provided on the upper part of the valve seat 1, and the boss 7 is sleeved in the valve sleeve 2 and is longitudinally provided with a first countersunk hole. The upper surface of the boss 7 is sealed and attached to the lower surface of the valve body 3. A second countersunk hole is radially provided at the lower part of the valve seat 1, and the second countersunk hole is correspondingly arranged below the first countersunk hole. The outer wall of the lower part of the valve seat 1 is sealed and connected with the inner wall of the valve sleeve 2. The space formed in the first countersunk hole is the low-pressure valve cavity 19, the space between the boss 7 and the valve sleeve 2 is the high-pressure valve cavity 20, and the space formed in the second countersunk hole is the slide valve cavity 21. The slide valve cavity 21 is connected to the low-pressure valve cavity 19 and the high-pressure valve cavity 20 through the low-pressure connecting hole 22 and the high-pressure connecting hole 23 respectively. The inner end of the slide valve cavity 21 is closed, and the outer end is connected to the outside of the valve sleeve 2.

[0042] A plurality of guide holes 24 are arranged in a circumferential array on the side wall of the valve sleeve 2. The lower end of the guide hole 24 is connected to the high-pressure valve chamber 20, and the upper end is connected to the outer side of the upper end of the valve sleeve 2.

[0043] The low-pressure valve pin 5 and the high-pressure valve pin 6 are both axially slidably arranged on the upper part of the valve seat 1 through a spring, and the low-pressure valve pin 5 and the high-pressure valve pin 6 are respectively located in the low-pressure valve cavity 19 and the high-pressure valve cavity 20, and the upper part of the low-pressure valve pin 5 and the upper part of the high-pressure valve pin 6 are respectively sealed and slidably arranged in the low-pressure valve hole 17 and the high-pressure valve hole 18, and the upper part of the low-pressure valve pin 5 and the upper part of the high-pressure valve pin 6 are both provided with a drainage hole 25;

[0044] The sliding valve assembly is located in the sliding valve cavity 21. The sliding valve assembly is used to control the opening and closing of the low-pressure connecting hole 22. The sliding valve assembly includes a sliding valve sleeve 8 and a sliding valve core 9. The sliding valve sleeve 8 is fixedly arranged in the sliding valve cavity 21. The outer circumference of the sliding valve sleeve 8 is stepped. The higher end of the outer side of the sliding valve sleeve 8 is sealed and fixedly connected to the sliding valve cavity 21. The lower end of the outer side of the sliding valve sleeve 8 is arranged correspondingly at the connecting point between the low-pressure connecting hole 22 and the sliding valve cavity 21 and a through hole is radially arranged. The sliding valve core 9 is arranged in the sliding valve sleeve 8 by sliding. A spring is arranged between the end of the sliding valve core 9 facing the inner end of the sliding valve cavity 21 and the inner end of the sliding valve cavity 21.

[0045] In order to optimize the product structure, in this embodiment, the valve stem 4 is also fitted with a limiter 10, a gasket 11 and a compensating valve plate 12. The limiter 10, the gasket 11 and the compensating valve plate 12 are stacked in sequence from top to bottom above the valve body 3. The valve body 3 is provided with a plurality of compensating holes 26, and the compensating holes 26 are located below the compensating valve plate 12.

[0046] In order to prevent the valve body 3 from rotating relative to the valve seat 1, a positioning mechanism is arranged between the valve body 3 and the valve seat 1, and the positioning mechanism includes an upper positioning countersunk hole, a lower positioning countersunk hole and a positioning pin 13. The upper positioning countersunk hole and the lower positioning countersunk hole are respectively located on the lower side of the valve body 3 and the upper side of the boss 7. The upper part of the positioning pin 13 is located in the upper positioning countersunk hole, and the lower part is located in the lower positioning countersunk hole.

[0047] In order to allow the oil above the valve body 3 to flow into the low-pressure valve chamber 19 or the high-pressure valve chamber 20 when the low-pressure valve pin 5 or the high-pressure valve pin 6 is pressed down, the drainage hole 25 on the upper part of the low-pressure valve pin 5 or the high-pressure valve pin 6 includes a vertical section and a horizontal section, the upper end of the vertical section is connected to the upper end surface of the low-pressure valve pin 5 or the high-pressure valve pin 6, the lower end is connected to the inner end of the horizontal section, and the outer end of the horizontal section is connected to the side wall of the low-pressure valve pin 5 or the high-pressure valve pin 6.

[0048] A shock absorber group for resisting vehicle rollover includes two shock absorbers, the shock absorber includes an oil storage cylinder 14, a working cylinder 15, an intermediate cylinder 16 and a valve device, the inner wall of the oil storage cylinder 14 is sealed with the outer wall of the valve sleeve 2, the lower end of the working cylinder 15 abuts against the valve sleeve 2 and the outer wall of the working cylinder 15 is sealed with the inner wall of the valve sleeve 2, the intermediate cylinder 16 is coaxially sleeved on the working cylinder 15 and the lower end face of the intermediate cylinder 16 is sealed and attached to the upper end face of the valve sleeve 2, and the upper end of the guide hole 24 is located between the intermediate cylinder 16 and the oil storage cylinder 14.

[0049] The valve sleeve 2 is provided with a plurality of interactive holes 27 in a circumferential array, the upper ends of the interactive holes 27 are connected to the upper end surface of the valve sleeve 2 and are located between the working cylinder 15 and the intermediate cylinder 16, and the lower ends are connected to the outer side of the side wall of the valve sleeve 2. The lower ends of the interactive holes 27 and the outer ends of the sliding valve chamber 21 of the valve device of one shock absorber are respectively connected to the outer ends of the sliding valve chamber 21 of the valve device of another shock absorber and the lower ends of the interactive holes 27 of the valve sleeve 2.

[0050] Working process:

[0051] When the shock absorber is in the compression stroke, channel one: the pressure in the lower chamber of the working cylinder 15 increases, pushing the low-pressure valve pin 5 down, and the oil enters the low-pressure valve chamber 19 through the drainage hole 25 at the upper end of the low-pressure valve pin 5, and then flows into the sliding valve chamber 21 through the low-pressure connecting hole 22, and then flows into the high-pressure valve chamber 20 through the high-pressure connecting hole 23, and then flows into the oil storage cylinder 14 through the guide hole 24; channel two: when the pressure in the lower chamber of the working cylinder 15 reaches a certain level, the high-pressure valve pin 6 descends, and the oil enters the high-pressure valve chamber 20 through the drainage hole 25 at the upper end of the high-pressure valve pin 6, and then flows into the oil storage cylinder 14 through the guide hole 24.

[0052] When oil enters the outer end of the sliding valve chamber 21, the oil pushes the sliding valve core 9 to move inward. At the same time, the outer side of the sliding valve core 9 gradually closes the through hole on the outer side of the sliding valve sleeve 8, thereby changing the flow volume of the low-pressure connecting hole 22, and then adjusting the compression damping force. When the through hole on the outer side of the sliding valve sleeve 8 is completely blocked, the low-pressure connecting hole 22 is closed, and the oil can only flow out through the high-pressure connecting hole 23. At this time, the compression damping force increases sharply.

[0053] When the shock absorber is in the stretching stroke, negative pressure is formed in the chamber of the working cylinder 15, and the oil in the oil storage cylinder 14 flows into the high-pressure valve chamber 20 through the guide hole 24, and then opens the compensation valve plate 12 through the compensation hole 26 on the valve body 3 to flow into the lower chamber of the working cylinder 15. At the same time, the oil in the upper chamber of the working cylinder 15 flows into the middle cylinder 16 through the side wall hole of the upper chamber of the working cylinder 15, and then flows into the outer end of the sliding valve chamber 21 of the other shock absorber through the interactive hole 27. The compression damping force of the other shock absorber is increased through the stretching stroke of the shock absorber, thereby improving the anti-roll capability of the whole vehicle.

[0054] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A valve device with adjustable compression damping, characterized in that: The invention comprises a valve seat (1), a valve sleeve (2), a valve body (3), a valve stem (4), a low-pressure valve pin (5), a high-pressure valve pin (6) and a sliding valve assembly, wherein the valve sleeve (2) is in the shape of a circular tube, the valve body (3) and the valve seat (1) are respectively located at the upper and lower ends of the valve sleeve (2), and the valve stem (4) used for fastening the valve seat (1), the valve sleeve (2) and the valve body (3) as a whole passes through the valve body (3) from top to bottom and is threadedly sleeved on the valve seat (1); The valve body (3) is provided with a low-pressure valve hole (17) and a high-pressure valve hole (18), and the outer wall of the valve body (3) is sealedly connected to the inner wall of the valve sleeve (2); The valve seat (1) is provided with a boss (7) on the upper part, the boss (7) is sleeved in the valve sleeve (2) and is longitudinally provided with a first countersunk hole, the upper surface of the boss (7) is sealed and attached to the lower surface of the valve body (3), the lower part of the valve seat (1) is radially provided with a second countersunk hole, the second countersunk hole is correspondingly arranged below the first countersunk hole, the lower outer wall of the valve seat (1) is sealedly connected to the inner wall of the valve sleeve (2), the space formed in the first countersunk hole is a low-pressure valve chamber (19), and the space between the boss (7) and the valve sleeve (2) is a high-pressure valve chamber (19). The space formed in the second counterbore is a slide valve chamber (21), the slide valve chamber (21) is connected to the low-pressure valve chamber (19) and the high-pressure valve chamber (20) through the low-pressure connecting hole (22) and the high-pressure connecting hole (23), the inner end of the slide valve chamber (21) is closed, and the outer end is connected to the outside of the valve sleeve (2); the side wall of the valve sleeve (2) is provided with a plurality of guide holes (24) in a circumferential array, the lower end of the guide holes (24) is connected to the high-pressure valve chamber (20), and the upper end is connected to the outer side of the upper end of the valve sleeve (2); The low-pressure valve pin (5) and the high-pressure valve pin (6) are both axially slidably arranged on the upper part of the valve seat (1) through a spring, the low-pressure valve pin (5) and the high-pressure valve pin (6) are respectively located in the low-pressure valve cavity (19) and the high-pressure valve cavity (20), the upper part of the low-pressure valve pin (5) and the upper part of the high-pressure valve pin (6) are respectively sealed and slidably arranged in the low-pressure valve hole (17) and the high-pressure valve hole (18), and the upper part of the low-pressure valve pin (5) and the upper part of the high-pressure valve pin (6) are both provided with a drainage hole (25); The slide valve assembly is located in the slide valve chamber (21), and the slide valve assembly is used to control the opening and closing of the low-pressure communication hole (22); The valve stem (4) is also sleeved with a limiter (10), a gasket (11) and a compensating valve plate (12); the limiter (10), the gasket (11) and the compensating valve plate (12) are stacked in sequence from top to bottom on the valve body (3); the valve body (3) is provided with a plurality of compensating holes (26); the compensating holes (26) are located below the compensating valve plate (12); A positioning mechanism is provided between the valve body (3) and the valve seat (1), the positioning mechanism comprising an upper positioning countersunk hole, a lower positioning countersunk hole and a positioning pin (13), the upper positioning countersunk hole and the lower positioning countersunk hole being respectively located on the lower side of the valve body (3) and the upper side of the boss (7), the upper part of the positioning pin (13) being located in the upper positioning countersunk hole and the lower part being located in the lower positioning countersunk hole.

2. A valve device with adjustable compression damping according to claim 1, characterized in that: The drainage hole (25) on the upper part of the low-pressure valve pin (5) or the high-pressure valve pin (6) comprises a vertical section and a horizontal section, wherein the upper end of the vertical section is connected to the upper end surface of the low-pressure valve pin (5) or the high-pressure valve pin (6), and the lower end is connected to the inner end of the horizontal section, and the outer end of the horizontal section is connected to the side wall of the low-pressure valve pin (5) or the high-pressure valve pin (6).

3. A compression damping adjustable valve device according to claim 1, characterized in that: The slide valve assembly comprises a slide valve sleeve (8) and a slide valve core (9); the slide valve sleeve (8) is fixedly arranged in the slide valve cavity (21); the outer circumference of the slide valve sleeve (8) is stepped; the higher end of the outer side of the slide valve sleeve (8) is sealed and fixedly connected to the slide valve cavity (21); the lower end of the outer side of the slide valve sleeve (8) is arranged corresponding to the connection between the low-pressure connecting hole (22) and the slide valve cavity (21) and a through hole is arranged radially; the slide valve core (9) is arranged in the slide valve sleeve (8) by sliding; a spring is arranged between the end of the slide valve core (9) facing the inner end of the slide valve cavity (21) and the inner end of the slide valve cavity (21).

4. A shock absorber group for resisting vehicle roll, characterized in that: The invention comprises two shock absorbers, wherein the shock absorbers comprise an oil storage cylinder (14), a working cylinder (15), an intermediate cylinder (16) and a valve device with adjustable compression damping as described in any one of claims 1 to 3, wherein the inner wall of the oil storage cylinder (14) is sealedly connected to the outer wall of the valve sleeve (2), the lower end of the working cylinder (15) abuts against the valve sleeve (2) and the outer wall of the working cylinder (15) is sealedly connected to the inner wall of the valve sleeve (2), the intermediate cylinder (16) is coaxially sleeved on the working cylinder (15) and the lower end face of the intermediate cylinder (16) is sealedly attached to the upper end face of the valve sleeve (2), and the upper end of the guide hole (24) is located between the intermediate cylinder (16) and the oil storage cylinder (14).

5. The shock absorber assembly for resisting vehicle rollover according to claim 4, characterized in that: The valve sleeve (2) is provided with a plurality of interactive holes (27) in a circumferential array, the upper ends of the interactive holes (27) being connected to the upper end surface of the valve sleeve (2) and being located between the working cylinder (15) and the intermediate cylinder (16), and the lower ends of the interactive holes (27) being connected to the outer side of the side wall of the valve sleeve (2).

6. The shock absorber assembly for resisting vehicle rollover according to claim 5, characterized in that: The lower end of the interactive hole (27) of the valve sleeve (2) of the valve device of one of the shock absorbers and the outer end of the sliding valve cavity (21) are respectively connected to the outer end of the sliding valve cavity (21) of the valve device of the other shock absorber and the lower end of the interactive hole (27) of the valve sleeve (2).

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