Pilot valve for shock absorber, shock absorber and vehicle

Abstract

The utility model discloses a pilot valve for a shock absorber, the shock absorber and a vehicle, the pilot valve comprises a base, a pilot valve element, a pilot valve element, a pilot valve element, a pilot valve element, a pilot valve element, a pilot valve element, a pilot valve element and a pilot valve element, the pilot valve plug is arranged on the other side of the base and can move relative to the base, and the pilot valve plug is used for being matched with a flow regulating valve of the shock absorber; and the pilot valve elastic piece is arranged between the base and the pilot valve plug so as to provide elastic force for the pilot valve plug to be far away from the base. According to the pilot valve provided by the embodiment of the utility model, the pilot valve plug can be instantaneously opened and closed for multiple times, so that the impact force of fluid can be effectively buffered, the impact force on the valve core component is favorably reduced, and the damping force of a shock absorber is more stable.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, in particular to a pilot valve for a shock absorber, a shock absorber and a vehicle Background Art

[0002] The shock absorber in the related art is usually provided with a valve core assembly, a pilot valve and a flow regulating valve. The valve core assembly can be matched with the flow regulating valve through the pilot valve to control the flow regulating valve, thereby adjusting the fluid flow between the compression chamber and the recovery chamber.

[0003] However, due to the unreasonable structural setting of the pilot valve in the related technology, when the shock absorber is in the recovery condition, the fluid in the recovery chamber flows into the compression chamber through the flow regulating valve. At this time, the fluid will generate an impact force on the pilot valve and the valve core assembly, and the impact force is large. The pilot valve in the related technology cannot effectively buffer the impact force of the fluid, which can easily lead to poor resistance stability of the shock absorber. Utility Model Content

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one object of the present invention is to provide a pilot valve for a shock absorber that can instantaneously open and close the pilot valve plug multiple times, thereby effectively buffering the impact force of the fluid, thereby facilitating the reduction of the impact force on the valve core assembly and stabilizing the damping force of the shock absorber.

[0005] The utility model also provides a shock absorber with the pilot valve.

[0006] The utility model also provides a vehicle with the shock absorber.

[0007] In order to achieve the above-mentioned purpose, according to the first aspect embodiment of the present utility model, a pilot valve for a shock absorber is proposed, comprising: a base, one side of the base is suitable for connecting to the valve core assembly of the shock absorber; a pilot valve plug, the pilot valve plug is arranged on the other side of the base and is movable relative to the base, the pilot valve plug is used to cooperate with the flow regulating valve of the shock absorber; a pilot valve elastic member, the pilot valve elastic member is arranged between the base and the pilot valve plug to provide an elastic force for the pilot valve plug to move away from the base.

[0008] The pilot valve according to the embodiment of the present invention can open and close the pilot valve plug instantaneously multiple times, thereby effectively buffering the impact force of the fluid, which is beneficial to reducing the impact force on the valve core assembly and making the damping force of the shock absorber more stable.

[0009] According to some embodiments of the present invention, the pilot valve elastic member includes: an outer ring body, which abuts against the pilot valve plug; an inner elastic arm, the outer end of which is connected to the outer ring body, and the inner end of which abuts against the base.

[0010] According to some embodiments of the present invention, the width of the inner elastic arm decreases in a radially inward direction along the outer ring body.

[0011] According to some embodiments of the present invention, there are multiple inner elastic arms, and the multiple inner elastic arms are arranged at intervals along the circumference of the outer ring body.

[0012] According to some embodiments of the present invention, the inner ends of the plurality of inner elastic arms are all planes, and the inner ends of the plurality of inner elastic arms are circumscribed to the same circle.

[0013] According to some embodiments of the present invention, within the compression range of the pilot valve elastic member, the pilot valve plug moves relative to the base between a first position and a second position along the axial direction of the base, and the pilot valve elastic member provides an elastic force of 10N~50N to the pilot valve plug.

[0014] According to some embodiments of the present invention, the base includes: a base body portion, which is suitable for connecting with the valve core assembly; a base guide portion, which extends along the circumference of the base body portion, and the base guide portion extends from the outer periphery of the base body portion toward one side of the pilot valve plug.

[0015] According to some embodiments of the present invention, the base guide portion is constructed in a ring shape, and the pilot valve plug and the pilot valve elastic member are located in an inner ring of the base guide portion.

[0016] According to some embodiments of the present invention, the base guide portion is constructed with a stop structure, and the stop structure stops at a side of the pilot valve plug facing away from the base body portion.

[0017] According to some embodiments of the present invention, there are multiple stop structures, and the multiple stop structures are distributed at intervals along the circumference of the base guide portion.

[0018] According to some embodiments of the present invention, the base guide portion includes: a first guide section, one end of the first guide section is connected to the base body portion; a second guide section, the second guide section and the first guide section are arranged along the axial direction of the base, and the second guide section is connected to the end of the first guide section away from the base body portion; wherein the thickness of the second guide section is smaller than the thickness of the first guide section, and the stop structure is constructed on the second guide section.

[0019] According to some embodiments of the present invention, the stop structure is constructed as a stop rib that extends obliquely relative to the base guide portion toward the central axis of the base body portion.

[0020] According to some embodiments of the present invention, the stop rib is formed by bending a portion of the base guide portion, and a notch is formed at a position of the base guide portion corresponding to the portion.

[0021] According to some embodiments of the present invention, a base abutment platform protruding toward the pilot valve elastic member is formed in the middle portion of the base body portion on one side facing the pilot valve elastic member, a base avoidance groove is formed between the base abutment platform and the base guide portion, the radial outer side of the pilot valve elastic member is spaced from the base avoidance groove, and the radial inner side of the pilot valve elastic member abuts against the base abutment platform.

[0022] According to some embodiments of the present invention, the bottom of the base avoidance groove is a circular plane; or, the bottom of the base avoidance groove is a conical surface away from the pilot valve elastic member in the radial outward direction of the base body.

[0023] According to some embodiments of the present invention, the base body is provided with a base balancing hole.

[0024] According to some embodiments of the present invention, there are multiple base balancing holes, and the multiple base balancing holes are spaced apart and distributed in the circumferential direction of the base body.

[0025] According to some embodiments of the present invention, the base further includes: an annular boss, which is arranged on a side of the base body away from the pilot valve elastic member, and the annular boss is formed with a guide rod connecting groove.

[0026] According to some embodiments of the present invention, the pilot valve plug includes: a plug plate, an edge of the plug plate facing the pilot valve elastic member abuts against the pilot valve elastic member and a plug plate avoidance groove is formed on the radial inner side; and a plug head, the plug head is arranged in the middle of the side of the plug plate facing away from the pilot valve elastic member.

[0027] According to some embodiments of the present invention, the bottom of the plug avoidance groove is a circular plane; or, the bottom of the plug avoidance groove is a conical surface that is inclined radially outward along the plug and approaches the pilot valve elastic member.

[0028] According to the second aspect of the present invention, a shock absorber is proposed, which includes: a cylinder; a piston, which is movably arranged in the cylinder, and the piston separates a compression chamber and a recovery chamber in the cylinder; a flow regulating valve, which is arranged in the piston and is respectively connected to the compression chamber and the recovery chamber; a control valve, which includes a valve core assembly and a pilot valve according to the first aspect of the present invention, the valve core assembly is arranged in the piston, the pilot valve is connected to the valve core assembly, and the valve core assembly controls the flow regulating valve through the pilot valve to adjust the fluid flow between the compression chamber and the recovery chamber.

[0029] According to the shock absorber described in the embodiment of the second aspect of the present invention, by utilizing the pilot valve described in the embodiment of the first aspect of the present invention, the shock absorber can open and close the pilot valve instantaneously multiple times, thereby effectively buffering the impact force of the fluid, which is beneficial to reducing the impact force on the valve core assembly and making the damping force of the shock absorber more stable.

[0030] According to a third aspect of the present invention, a vehicle is provided. The vehicle includes the shock absorber according to the second aspect of the present invention.

[0031] According to the vehicle described in the embodiment of the third aspect of the present invention, by utilizing the shock absorber described in the embodiment of the second aspect of the present invention, the shock absorber can open and close the pilot valve instantaneously multiple times, thereby effectively buffering the impact force of the fluid, which is beneficial to reducing the impact force on the valve core assembly and making the damping force of the shock absorber more stable.

[0032] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0034] Figure 1 1 is a schematic structural diagram of a shock absorber according to an embodiment of the present utility model;

[0035] Figure 2 This is a structural schematic diagram of the flow control valve according to an embodiment of the present invention when it is in an open valve state at the initial position and restored to its working condition;

[0036] Figure 3 This is a structural schematic diagram of a flow control valve according to an embodiment of the present invention in a compression working condition when the flow control valve is in an open valve state at an initial position;

[0037] Figure 4This is a structural schematic diagram of the flow control valve according to an embodiment of the present invention when the initial position is in the closed state and the working condition is restored;

[0038] Figure 5 This is a structural schematic diagram of a flow control valve according to an embodiment of the present invention in a compression working condition when the flow control valve is in a closed state at the initial position;

[0039] Figure 6 1 is a schematic structural diagram of a pilot valve according to an embodiment of the present utility model;

[0040] Figure 7 This is a schematic structural diagram of a pilot valve according to an embodiment of the present utility model from another perspective;

[0041] Figure 8 is a cross-sectional view of a pilot valve according to an embodiment of the present utility model;

[0042] Figure 9 is an exploded view of a pilot valve according to an embodiment of the present utility model;

[0043] Figure 10 is a cross-sectional exploded view of a pilot valve according to an embodiment of the present utility model;

[0044] Figure 11 1 is a schematic structural diagram of a base of a pilot valve according to an embodiment of the present utility model;

[0045] Figure 12 1 is a schematic structural diagram of a pilot valve elastic member according to an embodiment of the present utility model;

[0046] Figure 13 This is a structural schematic diagram of the pilot valve elastic member according to another perspective of an embodiment of the present utility model;

[0047] Figure 14 1 is a schematic structural diagram of a pilot valve plug according to an embodiment of the present utility model;

[0048] Figure 15 1 is a schematic structural diagram of a pilot valve plug according to an embodiment of the present utility model;

[0049] Figure 16 It is a cross-sectional view of a pilot valve plug according to an embodiment of the present utility model.

[0050] Reference numerals:

[0051] 1. Shock absorber;

[0052] 100, cylinder; 110, inner cylinder; 111, compression chamber; 112, recovery chamber; 120, outer cylinder; 121, liquid storage chamber; 130, bottom valve assembly;

[0053] 200, piston;

[0054] 300, flow control valve;

[0055] 400, control valve;

[0056] 500, valve core assembly; 530, guide rod;

[0057] 600, pilot valve; 630, base; 631, base body; 632, base guide portion; 6321, first guide section; 6322, second guide section; 633, stop structure; 634, base balancing hole; 635, notch; 636, base abutment platform; 637, base avoidance groove; 638, annular boss; 639, guide rod connecting groove; 640, pilot valve plug; 641, plug plate; 642, plug plate avoidance groove; 643, plug head; 650, pilot valve elastic member; 651, outer ring body; 652, inner elastic arm. DETAILED DESCRIPTION

[0058] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0059] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0060] In the description of the present invention, "first feature" and "second feature" may include one or more such features.

[0061] In the description of the present invention, “multiple” means two or more, and “several” means one or more.

[0062] The shock absorber 1 according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0063] like Figure 1-Figure 5 As shown, the shock absorber 1 according to the embodiment of the present invention includes a cylinder 100 , a piston 200 , a flow regulating valve 300 and a control valve 400 .

[0064] The piston 200 is movably disposed in the cylinder 100, and the piston 200 separates a compression chamber 111 and a recovery chamber 112 in the cylinder 100. The flow regulating valve 300 is disposed in the piston 200 and is respectively connected to the compression chamber 111 and the recovery chamber 112. The control valve 400 is disposed in the piston 200, and the control valve 400 adjusts the fluid flow between the compression chamber 111 and the recovery chamber 112 by controlling the flow regulating valve 300.

[0065] The compression chamber 111 and the recovery chamber 112 may store fluid, such as fluid with a certain pressure and inert gas.

[0066] Among them, the shock absorber 1 also includes a bottom valve assembly 130, the cylinder 100 includes an outer cylinder 120 and an inner cylinder 110, the inner cylinder 110 extends into the outer cylinder 120, and a liquid storage chamber 121 is formed between the outer cylinder 120 and the inner cylinder 110. The piston 200 is movably arranged in the inner cylinder 110 and separates the compression chamber 111 and the recovery chamber 112 in the inner cylinder 110. The bottom valve assembly 130 is installed on the inner cylinder 110 or the outer cylinder 120. The fluid in the compression chamber 111 flows into the liquid storage chamber 121 through the bottom valve assembly 130, or the fluid in the liquid storage chamber 121 flows into the compression chamber 111 through the bottom valve assembly 130.

[0067] In the present invention, the flow control valve 300 is in an open state at the initial position, which refers to the initial open state when the flow control valve 300 is not squeezed by external pressure and no fluid flows in the flow control valve 300. In addition, the flow control valve 300 is in a closed state at the initial position, which refers to the initial closed state when the flow control valve 300 is squeezed by external force and the relief valve seat 320 and the relief valve body 310 of the flow control valve 300 are in contact with each other.

[0068] For example, in some embodiments, the valve core assembly 500 squeezes the flow regulating valve 300 when it is energized. At this time, the flow regulating valve 300 is in an open valve state at the initial position, which means that the valve core assembly 500 is not energized and there is no fluid flowing in the flow regulating valve 300. At this time, the flow regulating valve 300 is in a balanced state; and, the flow regulating valve 300 is in a closed valve state at the initial position, which means that the valve core assembly 500 is energized and the overflow valve seat 320 and the overflow valve body 310 of the flow regulating valve 300 are in abutment and closed initial state.

[0069] Alternatively, in other embodiments, the valve core assembly 500 will squeeze the flow regulating valve 300 when it is not powered. At this time, the flow regulating valve 300 is in an open valve state at the initial position, which means that the valve core assembly 500 is powered and there is no fluid flowing in the flow regulating valve 300. At this time, the flow regulating valve 300 is in a balanced state; and, the flow regulating valve 300 is in a closed valve state at the initial position, which means that the valve core assembly 500 is not powered and the overflow valve seat 320 and the overflow valve body 310 of the flow regulating valve 300 are in abutment and closed initial state.

[0070] According to the shock absorber 1 of the embodiment of the present invention, the piston 200 is movably arranged on the cylinder 100, and the piston 200 separates the compression chamber 111 and the recovery chamber 112 in the cylinder 100. The flow regulating valve 300 is arranged on the piston 200 and is connected to the compression chamber 111 and the recovery chamber 112 respectively.

[0071] In this way, when the shock absorber 1 is in a compression condition, the piston 200 compresses the volume of the compression chamber 111, and the volume of the recovery chamber 112 will increase accordingly. At this time, the fluid in the compression chamber 111 will flow to the recovery chamber 112 through the flow regulating valve 300, and when the shock absorber 1 is in a recovery condition, the piston 200 compresses the volume of the recovery chamber 112, and the volume of the compression chamber 111 will increase accordingly. At this time, the fluid in the recovery chamber 112 will flow to the compression chamber 111 through the flow regulating valve 300. In the above process, by repeatedly changing the moving direction of the piston 200, the fluid repeatedly flows between the compression chamber 111 and the recovery chamber 112, and the friction between the fluid and the shock absorber 1 generates heat, which can convert the kinetic energy of the piston 200 into the thermal energy of the fluid, thereby reducing the power of the piston 200.

[0072] Therefore, when the cylinder 100 and the piston 200 of the shock absorber 1 are respectively connected to two objects (such as a vehicle frame and a wheel), when one of the two objects vibrates, the presence of the shock absorber 1 can reduce the vibration force transmitted to the other object, thereby achieving a vibration reduction effect.

[0073] In addition, the control valve 400 is provided on the piston 200 . The control valve 400 regulates the fluid flow between the compression chamber 111 and the recovery chamber 112 by controlling the flow regulating valve 300 .

[0074] In this way, when the piston 200 moves, the control valve 400 can be used to adjust the fluid flow rate flowing back and forth between the compression chamber 111 and the recovery chamber 112 at the same time. When the fluid flow rate flowing through the flow regulating valve 300 is large, the damping force of the shock absorber 1 can be small, that is, the shock absorber 1 can appear "soft", and when the fluid flow rate flowing through the flow regulating valve 300 is small, the damping force of the shock absorber 1 can be large, that is, the shock absorber 1 can appear "hard", and the control valve 400 can continuously adjust the size of the fluid flow rate flowing through the flow regulating valve 300, so that the shock absorber 1 can achieve continuous adjustment of the damping force, which is beneficial to improving the vehicle's ride comfort and handling stability.

[0075] Moreover, by controlling the flow regulating valve 300 through the control valve 400, the fluid flow structure between the compression chamber 111 and the recovery chamber 112 of the shock absorber 1 is simple, thereby simplifying the adjustment structure of the damping force of the shock absorber 1, so as to facilitate the adjustment of the damping force of the shock absorber 1, and the adjustment is simpler and more convenient.

[0076] In this way, the shock absorber 1 according to the embodiment of the present invention can continuously adjust the damping force by adjusting the fluid flow between the compression chamber 111 and the recovery chamber 112, which is beneficial to improving the ride comfort and vehicle handling performance. In addition, the shock absorber 1 has a simple structure and is easy to adjust.

[0077] A pilot valve 600 for a shock absorber according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0078] like Figures 1-16 As shown, the pilot valve 600 for a shock absorber according to an embodiment of the present invention comprises a base 630, a pilot valve plug 640 and a pilot valve elastic member 650. The pilot valve elastic member 650 in the present invention is the second elastic member in the priority application.

[0079] One side of the base 630 is suitable for connecting to the valve core assembly 500 of the shock absorber 1, and the pilot valve plug 640 is arranged on the other side of the base 630 and is movable relative to the base 630. The pilot valve plug 640 is used to cooperate with the flow regulating valve 300 of the shock absorber 1. The pilot valve elastic member 650 is arranged between the base 630 and the pilot valve plug 640 to provide an elastic force to move the pilot valve plug 640 away from the base 630.

[0080] According to the pilot valve 600 of the embodiment of the present invention, by connecting one side of the base 630 to the valve core assembly 500, when the valve core assembly 500 moves, the valve core assembly 500 can drive the pilot valve 600 to move, or, when the fluid pushes the pilot valve 600 to move in a direction away from the flow control valve 300, the pilot valve 600 can also drive the valve core assembly 500 to move, thereby adjusting the fluid flow of the flow control valve 300.

[0081] Furthermore, by dividing the pilot valve 600 into a base 630, a pilot valve plug 640, and a pilot valve elastic member 650, with the pilot valve elastic member 650 disposed between the base 630 and the pilot valve plug 640, when the pilot valve plug 640 moves toward the base 630, the pilot valve elastic member 650 provides an elastic force that forces the pilot valve plug 640 away from the base 630. Thus, along the axial direction of the pilot valve 600, the base 630, the pilot valve plug 640, and the pilot valve elastic member 650 can move relative to each other. When the shock absorber 1 is de-energized or in a low-current state, the fluid flowing out of the flow control valve 300 can instantly open and close the pilot valve plug 640 multiple times. The pilot valve plug 640 and the pilot valve elastic member 650 can then buffer the impact force of the fluid, thereby reducing the impact force of the fluid on the valve core assembly 500 and further stabilizing the damping force of the shock absorber 1.

[0082] In this way, the pilot valve 600 according to the embodiment of the present invention can open and close the pilot valve plug 640 instantaneously multiple times, thereby effectively buffering the impact force of the fluid, which is beneficial to reducing the impact force on the valve core assembly 500 and making the damping force of the shock absorber 1 more stable.

[0083] In some specific embodiments of the present invention, Figure 12 and Figure 13 As shown, the pilot valve elastic member 650 includes an outer ring body 651 and an inner elastic arm 652 .

[0084] The outer ring body 651 abuts against the pilot valve plug 640 , the outer end of the inner elastic arm 652 is connected to the outer ring body 651 , and the inner end of the inner elastic arm 652 abuts against the base 630 .

[0085] That is to say, the pilot valve elastic part 650 can adjust the axial position of the outer ring body 651 on the base 630 through the deformation of the inner elastic arm 652. In this way, not only can the relative position of the pilot valve plug 640 and the base 630 be adjusted by the pilot valve elastic part 650 so that the pilot valve plug 640 can move relative to the base 630, but the pilot valve elastic part 650 can also be more effectively utilized to buffer the impact force of the fluid, so that the pilot valve 600 can be used to absorb the impact force of the fluid, so that the damping force of the shock absorber 1 can be more stable.

[0086] Furthermore, if Figure 13 As shown, the width of the inner elastic arm 652 decreases in the radial inward direction along the outer ring body 651.

[0087] In other words, along the radial direction of the pilot valve elastic member 650, the width of the end of the inner elastic arm 652 close to the outer ring body 651 is larger, and the width of the end of the inner elastic arm 652 away from the outer ring body 651 is smaller. This arrangement can, on the one hand, make the partial width of the inner elastic arm 652 smaller, so that the inner elastic arm 652 can be deformed, and then generate an elastic force to drive the pilot valve plug 640 away from the base 630. On the other hand, the width of the connection between the inner elastic arm 652 and the outer ring body 651 can be larger, which is beneficial to improve the connection strength between the inner elastic arm 652 and the outer ring body 651, that is, the overall structural strength of the pilot valve elastic member 650 can be improved, and the pilot valve elastic member 650 is not easily damaged or failed.

[0088] In some specific embodiments of the present invention, Figure 12 and Figure 13 As shown, there are multiple inner elastic arms 652 , and the multiple inner elastic arms 652 are arranged at intervals along the circumference of the outer ring body 651 .

[0089] For example, there may be six inner elastic arms 652 , and the six inner elastic arms 652 are arranged at intervals along the circumference of the outer ring body 651 .

[0090] By setting multiple internal elastic arms 652, not only can a single internal elastic arm 652 be set smaller to facilitate elastic deformation of the single internal elastic arm 652, but multiple internal elastic arms 652 can also be deformed simultaneously to provide an elastic force to move the pilot valve plug 640 away from the base 630, thereby ensuring sufficient elastic force, so that the elastic force of the pilot valve elastic part 650 is more stable and reliable, and the pilot valve 600 can more effectively absorb the impact force of the fluid on the valve core assembly 500.

[0091] In some specific embodiments of the present invention, Figure 13 As shown, the inner ends of the multiple inner elastic arms 652 are all flat, and the inner ends of the multiple inner elastic arms 652 are circumscribed with the same circle. In other words, the structures of the multiple inner elastic arms 652 can be set to be the same, or in other words, the lengths of the multiple inner elastic arms 652 can be consistent along the radial direction of the pilot valve elastic member 650.

[0092] Such a setting can not only simplify the structure of the multiple inner elastic arms 652, so that the structure of the pilot valve elastic part 650 is simpler and easier to process, but also when the multiple inner elastic arms 652 are deformed, it can ensure that the multiple inner elastic arms 652 can always be in contact with the base 630, and the deformation of the multiple inner elastic arms 652 can be consistent, further improving the stability of the elastic force generated by the pilot valve elastic part 650.

[0093] In addition, the inner end of the inner elastic arm 652 is a plane, which means that the end of the inner elastic arm 652 away from the outer ring body 651 is a plane. This arrangement can simplify the structure of the inner elastic arm 652, and the end of the inner elastic arm 652 that abuts the base 630 can be a plane, and the abutment area between the inner elastic arm 652 and the base 630 can be larger, which can make the abutment between the inner elastic arm 652 and the base 630 more stable and reliable.

[0094] In some specific embodiments of the present invention, within the compression range of the pilot valve elastic member 650, the pilot valve plug 640 moves relative to the base 630 between a first position and a second position along the axial direction of the base 630, and the elastic force provided by the pilot valve elastic member 650 to the pilot valve plug 640 is 10N~50N.

[0095] For example, the elastic force provided by the pilot valve elastic member 650 to the pilot valve plug 640 may be 10 N, 15 N, 20 N, 25 N, 30 N, 35 N, 40 N, 45 N, or 50 N. This configuration can, on the one hand, prevent the elastic force provided by the pilot valve elastic member 650 to the pilot valve plug 640 from being too small, thereby ensuring that the pilot valve plug 640 can move away from the base 630 under the action of the pilot valve elastic member 650, thereby improving the buffering effect of the pilot valve 600 on the fluid. On the other hand, it can prevent the elastic force provided by the pilot valve elastic member 650 to the pilot valve plug 640 from being too large, thereby improving the deformation of the pilot valve elastic member 650 to absorb the impact of the fluid.

[0096] In some specific embodiments of the present invention, Figures 6-11 As shown, the base 630 includes a base body portion 631 and a base guide portion 632 .

[0097] The base body portion 631 in the present invention is the second body portion in the priority application, and the base guide portion 632 is the second guide portion in the priority application.

[0098] The base body portion 631 is adapted to be connected to the valve core assembly 500 . The base guide portion 632 extends along the circumference of the base body portion 631 , and the base guide portion 632 extends from the outer periphery of the base body portion 631 toward one side of the pilot valve plug 640 .

[0099] In this way, when the fluid moves upward and hits the base body part 631 and the base body part 631 rebounds and flows downward, the base guide part 632 can stop the fluid and guide it toward the direction of the flow regulating valve 300, so that the fluid flowing out of the recovery chamber 112 through the flow regulating valve 300 can quickly pass through the flow regulating valve 300 to flow to the compression chamber 111, which is beneficial to increase the flow speed of the fluid flowing from the recovery chamber 112 to the compression chamber 111, and the fluid flow inside the shock absorber 1 is smoother.

[0100] Furthermore, if Figure 6 and Figure 7 As shown, the base guide portion 632 is constructed in an annular shape, and the pilot valve plug 640 and the pilot valve elastic member 650 are located in the inner ring of the base guide portion 632 .

[0101] In this way, not only can the annular base guide portion 632 be used to more effectively stop and guide the fluid, which is beneficial to improving the fluid guidance effect, but the base guide portion 632 can also be used to limit the pilot valve plug 640 and the pilot valve elastic member 650 in the radial direction of the base 630, avoiding relative displacement of the base 630, the pilot valve elastic member 650 and the pilot valve plug 640 along the radial direction of the base 630, and making the connection more reliable.

[0102] In some specific embodiments of the present invention, Figure 6-Figure 8 As shown, the base guide portion 632 is configured with a stop structure 633 , and the stop structure 633 stops at a side of the pilot valve plug 640 facing away from the base body portion 631 .

[0103] Among them, the stop structure 633 can be a riveted structure. In this way, after the pilot valve elastic part 650 and the pilot valve plug 640 are installed in the base 630, the stop structure 633 can be used to rivet and fix the pilot valve plug 640 and the pilot valve elastic part 650 to fix the base 630, the second elastic part and the pilot valve plug 640 together, to prevent the pilot valve elastic part 650 and the pilot valve plug 640 from detaching from the base 630 along the axial direction of the base 630, and the structural setting is more reasonable.

[0104] Furthermore, if Figure 7 As shown, there are multiple stop structures 633 , and the multiple stop structures 633 are distributed at intervals along the circumference of the base guide portion 632 .

[0105] By having multiple stop structures 633 stop at the side of the pilot valve plug 640 facing away from the base body 631 at the same time, multiple parts of the pilot valve plug 640 can be stopped, which is beneficial to improving the stability of the fixation of the pilot valve plug 640 and the pilot valve elastic part 650. The pilot valve plug 640 and the pilot valve elastic part 650 are less likely to separate from the base 630. Even if some of the multiple stop structures 633 fail, the stop structures 633 of other parts can still ensure that the pilot valve elastic part 650 and the pilot valve plug 640 are stably connected and fixed to the base 630.

[0106] In some specific embodiments of the present invention, Figure 8 and Figure 10 As shown, the base guide portion 632 includes a first guide section 6321 and a second guide section 6322 .

[0107] One end of the first guide section 6321 is connected to the base body 631 , the second guide section 6322 and the first guide section 6321 are arranged along the axial direction of the base 630 , and the second guide section 6322 is connected to one end of the first guide section 6321 away from the base body 631 .

[0108] The thickness of the second guide section 6322 is smaller than that of the first guide section 6321, and the stop structure 633 is constructed on the second guide section 6322. The thickness of the second guide section 6322 refers to the dimension of the second guide section 6322 along the radial direction of the base 630.

[0109] By setting the thickness of the second guide section 6322 to be smaller, the strength of the second guide section 6322 can be reduced, so that a stop structure 633 can be constructed on the second guide section 6322, which makes processing more convenient. In addition, by setting the stop structure 633 on the second guide section 6322, the stop structure 633 can be avoided from compressing the axial space of the first guide section 6321, so that the pilot valve elastic part 650 and the pilot valve plug 640 can be fixed in the base 630, and the structural setting is more reasonable.

[0110] In some specific embodiments of the present invention, Figure 7 and Figure 8 As shown, the stop structure 633 is constructed as a stop rib that extends obliquely relative to the base guide portion 632 toward the central axis of the base body portion 631 .

[0111] In other words, as the base flow guide portion 632 extends axially away from the base body portion 631, the stop rib can extend obliquely toward the central axis of the base body portion 631. That is, as the base flow guide portion 632 extends axially away from the base body portion 631, the distance between the stop rib and the sidewall on the other radial side of the base flow guide portion 632 gradually decreases. In this way, the distance between the end of the stop rib away from the base body portion 631 and the sidewall of the base flow guide portion 632 can be relatively small, and the stop rib can then stop the pilot valve plug 640 on the side facing away from the main body portion of the base 630, thereby securing the base 630, the pilot valve elastic member 650, and the pilot valve plug 640 together.

[0112] Furthermore, the stopping rib is formed by bending a portion of the base guide portion 632 , and a notch 635 is formed at a position corresponding to a portion of the base guide portion 632 .

[0113] Providing the notch 635 in the base flow guide portion 632 not only prevents the stop rib from interfering with the corresponding portion of the base flow guide portion 632, but also allows the stop rib to be disconnected from the corresponding portion of the base flow guide portion 632, thereby facilitating bending and deforming the stop rib. Specifically, after the pilot valve elastic member 650 and the pilot valve plug 640 are installed in the base 630, the stop rib can be bent toward the central axis of the main body of the base 630 so that the stop rib can be riveted to the side of the pilot valve plug 640 facing away from the main body of the base 630. The stop rib can then be used to stop the pilot valve elastic member 650 and the pilot valve plug 640, preventing them from separating from the base 630.

[0114] In some specific embodiments of the present invention, Figure 8 and Figure 10 As shown, a base abutment platform 636 protruding toward the pilot valve elastic member 650 is formed in the middle of the side of the base main body 631 facing the pilot valve elastic member 650, and a base avoidance groove 637 is formed between the base abutment platform 636 and the base guide portion 632. The radial outer side of the pilot valve elastic member 650 is spaced from the base avoidance groove 637, and the radial inner side of the pilot valve elastic member 650 abuts against the base abutment platform 636.

[0115] Among them, the middle part of the side of the base body 631 facing the pilot valve elastic part 650 refers to the position close to the central axis of the base body 631 on the side of the base body 631 facing the pilot valve elastic part 650, that is, the base abutment platform 636 is provided at the radial center position of the side of the base body 631 facing the pilot valve elastic part 650.

[0116] Thus, the middle part of the side of the base main body 631 facing the pilot valve elastic part 650 can protrude toward the direction close to the pilot valve elastic part 650, so that the radial inner side of the pilot valve elastic part 650 can abut against the base abutment platform 636, and the radial outer side of the pilot valve elastic part 650 can be spaced from the base avoidance groove 637. This can reserve a deformable space for the pilot valve elastic part 650, so that the pilot valve elastic part 650 can deform to generate an elastic force that drives the pilot valve plug 640 away from the main body of the base 630, so that the pilot valve 600 can be better utilized to absorb the impact force of the fluid, so that the damping force of the shock absorber 1 can be more stable.

[0117] Furthermore, the bottom of the base avoidance groove 637 is a circular plane, that is, the base avoidance groove 637 can be constructed in a groove shape, which not only simplifies the structure of the base avoidance groove 637 and facilitates processing, but also the volume of the base avoidance groove 637 can be larger. The base avoidance groove 637 can better avoid the pilot valve elastic part 650, so that the pilot valve elastic part 650 can have a larger deformable space.

[0118] Or, as Figure 11 As shown, the bottom of the base avoidance groove 637 is a conical surface that is radially outward from the pilot valve elastic member 650 along the base body portion 631 .

[0119] With this arrangement, the distance between the bottom of the base avoidance groove 637 and the pilot valve elastic member 650 can gradually increase radially outward along the base body 631. When the pilot valve plug 640 squeezes the outer ring body 651 of the pilot valve elastic member 650 and deforms in the direction close to the main body of the base 630, the base avoidance groove 637 can also effectively avoid the pilot valve elastic member 650 to facilitate the deformation of the pilot valve elastic member 650. Moreover, the thickness of the base body 631 at the position of the base avoidance groove 637 can gradually decrease. The influence of the base avoidance groove 637 on the structural strength of the base body 631 can be minimized, which is beneficial to ensuring the structural strength of the base 630, so that the structure of the pilot valve 600 is more stable and reliable.

[0120] In some specific embodiments of the present invention, Figure 6 、 Figure 9 and Figure 11 As shown, the base body 631 is provided with a base balancing hole 634. The base balancing hole 634 in the present invention is the second balancing hole in the priority application.

[0121] In this way, when the fluid flows out of the flow control valve 400 and impacts the pilot valve plug 640, the pilot valve plug 640 can be opened and closed multiple times in an instant, and at the same time, part of the fluid can flow upward from the base balance hole 634, thereby reducing the impact force of the fluid on the base 630, and more effectively reducing the impact force of the fluid on the valve core assembly 500, and the damping force of the shock absorber 1 can be more stable.

[0122] It should be noted that the radial outer side of the pilot valve elastic part 650 and the radial outer side of the pilot valve plug 640 can be spaced apart from the radial inner side of the base guide part 632, so as to facilitate the fluid to flow from the gap between the pilot valve plug 640 and the base guide part 632, and from the gap between the pilot valve elastic part 650 and the base guide part 632 to the base balance hole 634.

[0123] Furthermore, if Figure 6 、 Figure 9 and Figure 11 As shown, there are multiple base balancing holes 634, and the multiple base balancing holes 634 are spaced apart in the circumferential direction of the base body 631. In this way, the fluid can be discharged upward through the multiple base balancing holes 634 at the same time, further reducing the impact force of the fluid on the base 630 and achieving a better buffering effect.

[0124] In some specific embodiments of the present invention, Figure 6 、 Figures 8-10 As shown, the base 630 further includes an annular boss 638 , which is disposed on a side of the base body 631 away from the pilot valve elastic member 650 , and a guide rod connecting groove 639 is formed on the annular boss 638 .

[0125] That is to say, the annular boss 638 is arranged on the side of the base body part 631 facing the valve core assembly 500. For example, the annular boss 638 can be arranged in the middle of the radial direction of the base body part 631 and protrude from the side of the base body part 631 facing the valve core assembly 500. By constructing a guide rod connecting groove 639 in the annular boss 638, the structure of the original base body part 631 will not be destroyed, so as to ensure that the structural strength of the base body part 631 can be high.

[0126] Specifically, the guide rod connecting groove 639 can be connected to the guide rod 530 of the valve core assembly 500, and then the base 630 and the guide rod 530 of the valve core assembly 500 can be connected together to realize the connection and fixation of the pilot valve 600 and the guide rod 530, and the pilot valve 600 and the guide rod 530 move together.

[0127] In some specific embodiments of the present invention, Figure 14-16 As shown, the pilot valve plug 640 includes a plug piece 641 and a plug head 643. The plug head 643 in the embodiment of the present invention is the sealing protrusion in the priority application.

[0128] The edge of the plug 641 facing the pilot valve elastic member 650 abuts against the pilot valve elastic member 650 and a plug avoidance groove 642 is formed radially inwardly. The plug head 643 is arranged in the middle of the side of the plug 641 facing away from the pilot valve elastic member 650.

[0129] Specifically, the stop structure 633 can stop on the side of the plug 641 facing away from the main body of the base 630, and the plug head 643 can protrude from the side of the plug 641 facing away from the pilot valve elastic member 650. The pilot valve plug 640 can use the plug head 643 to cooperate with the flow regulating valve 300 to adjust the fluid flow of the flow regulating valve 300.

[0130] In addition, by providing a plug avoidance groove 642 on the radial inner side of the plug 641 facing the pilot valve elastic member 650, the distance between the radial outer side of the pilot valve plug 640 and the pilot valve elastic member 650 along the axial direction of the base 630 can be smaller, the position close to the outer edge of the pilot valve plug 640 can abut against the pilot valve elastic member 650, and the distance between the part of the pilot valve plug 640 close to the central axis and the pilot valve elastic member 650 is larger, the middle part of the pilot valve plug 640 can be spaced from the pilot valve elastic member 650, and the deformable amount of the pilot valve elastic member 650 can be larger, so that the pilot valve elastic member 650 can deform to generate an elastic force that drives the pilot valve plug 640 away from the main body of the base 630, so that the pilot valve 600 can be better utilized to absorb the impact force of the fluid, so that the damping force of the shock absorber 1 is more stable.

[0131] In some specific embodiments of the present invention, Figure 8 、 Figure 10 and Figure 16 As shown, the bottom of the plug avoidance groove 642 is a circular plane, that is, the plug avoidance groove 642 can be constructed in a groove shape, which not only simplifies the structure of the plug avoidance groove 642 and facilitates processing, but also the space of the plug avoidance groove 642 can be larger. The plug avoidance groove 642 can better avoid the pilot valve elastic part 650, so that the pilot valve elastic part 650 can have a larger deformable space.

[0132] Alternatively, the bottom of the plug avoidance groove 642 is a conical surface that slopes radially outward from the plug 641 toward the pilot valve elastic member 650. In this way, the side of the pilot valve plug 640 facing the base 630 can gradually move away from the base 630 as it moves radially inward from the pilot valve plug 640. In other words, along the axial direction of the cylinder 100, the distance between the radially outer side of the pilot valve plug 640 and the base 630 is smaller than the distance between the radially inner side of the pilot valve plug 640 and the base 630.

[0133] Thus, along the radial inward direction of the pilot valve plug 640, the distance between the bottom of the plug avoidance groove 642 and the pilot valve elastic member 650 can gradually increase. When the pilot valve plug 640 squeezes the outer ring body 651 of the pilot valve elastic member 650 to deform toward the main body of the base 630, the plug avoidance groove 642 can also effectively avoid the inner elastic arm 652 to facilitate the deformation of the pilot valve elastic member 650. Moreover, the thickness of the pilot valve plug 640 at the position of the plug avoidance groove 642 can gradually decrease. The influence of the setting of the plug avoidance groove 642 on the structural strength of the pilot valve plug 640 can be minimized, which is beneficial to ensure the structural strength of the pilot valve plug 640, so that the structure of the pilot valve 600 is more stable and reliable.

[0134] The following describes a shock absorber 1 according to an embodiment of the present invention with reference to the accompanying drawings. Figure 1-Figure 5 As shown, the shock absorber includes a cylinder 100 , a piston 200 , a flow regulating valve 300 and a control valve 400 .

[0135] The piston 200 is movably disposed in the cylinder 100, and the piston 200 separates a compression chamber 111 and a recovery chamber 112 in the cylinder 100. The flow regulating valve 300 is disposed in the piston 200 and is respectively connected to the compression chamber 111 and the recovery chamber 112. The control valve 400 includes a valve core assembly 500 and a pilot valve 600 according to the above embodiment of the present invention. The valve core assembly 500 is disposed in the piston 200, the pilot valve 600 is connected to the valve core assembly 500, and the valve core assembly 500 controls the flow regulating valve 300 through the pilot valve 600 to adjust the fluid flow between the compression chamber 111 and the recovery chamber 112.

[0136] According to the shock absorber 1 of the embodiment of the present invention, by utilizing the pilot valve 600 according to the above-mentioned embodiment of the present invention, the shock absorber 1 can open and close the pilot valve 600 instantaneously multiple times, thereby effectively buffering the impact force of the fluid, which is beneficial to reducing the impact force on the valve core assembly 500 and making the damping force of the shock absorber 1 more stable.

[0137] A vehicle according to an embodiment of the present invention will be described below with reference to the accompanying drawings. The vehicle includes the shock absorber 1 according to the above embodiment of the present invention.

[0138] According to the vehicle of the embodiment of the present invention, by utilizing the shock absorber 1 according to the above-mentioned embodiment of the present invention, the shock absorber 1 can open and close the pilot valve 600 instantaneously multiple times, thereby effectively buffering the impact force of the fluid, which is beneficial to reducing the impact force on the valve core assembly 500 and making the damping force of the shock absorber 1 more stable.

[0139] The pilot valve 600 for the shock absorber, the shock absorber 1 and other components and operations of the vehicle according to the embodiment of the present invention are well known to those skilled in the art and will not be described in detail here.

[0140] In this specification, reference to terms such as "specific embodiment" and "specific example" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example.

[0141] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A pilot valve (600) for a shock absorber, characterized in that: include: a base (630), one side of the base (630) being suitable for connection with the valve core assembly (500) of the shock absorber (1); a pilot valve plug (640), the pilot valve plug (640) being arranged on the other side of the base (630) and being movable relative to the base (630), the pilot valve plug (640) being used to cooperate with the flow regulating valve (300) of the shock absorber (1); A pilot valve elastic member (650) is provided between the base (630) and the pilot valve plug (640) to provide an elastic force for the pilot valve plug (640) to move away from the base (630).

2. The pilot valve (600) for a shock absorber according to claim 1, characterized in that: The pilot valve elastic member (650) comprises: an outer ring body (651), the outer ring body (651) abutting against the pilot valve plug (640); An inner elastic arm (652), the outer end of the inner elastic arm (652) is connected to the outer ring body (651), and the inner end of the inner elastic arm (652) is in contact with the base (630).

3. The pilot valve (600) for a shock absorber according to claim 2, characterized in that: The width of the inner elastic arm (652) decreases in the radially inward direction of the outer ring body (651).

4. The pilot valve (600) for a shock absorber according to claim 2, characterized in that: There are a plurality of inner elastic arms (652), and the plurality of inner elastic arms (652) are arranged at intervals along the circumference of the outer ring body (651).

5. The pilot valve (600) for a shock absorber according to claim 4, characterized in that: The inner ends of the multiple inner elastic arms (652) are all planes, and the inner ends of the multiple inner elastic arms (652) are circumscribed to the same circle.

6. The pilot valve for a shock absorber according to claim 1, characterized in that: Within the compression range of the pilot valve elastic member (650), the pilot valve plug (640) moves relative to the base (630) between a first position and a second position along the axial direction of the base (630), and the elastic force provided by the pilot valve elastic member (650) to the pilot valve plug (640) is 10N~50N.

7. The pilot valve (600) for a shock absorber according to claim 1, characterized in that: The base (630) includes: a base body portion (631), the base body portion (631) being suitable for connection with the valve core assembly (500); A base guide portion (632), the base guide portion (632) extends along the circumference of the base body portion (631), and the base guide portion (632) extends from the outer peripheral edge of the base body portion (631) toward one side of the pilot valve plug (640).

8. The pilot valve (600) for a shock absorber according to claim 7, characterized in that: The base guide portion (632) is constructed in a ring shape, and the pilot valve plug (640) and the pilot valve elastic member (650) are located in the inner ring of the base guide portion (632).

9. The pilot valve (600) for a shock absorber according to claim 7, characterized in that: The base guide portion (632) is configured with a stop structure (633), and the stop structure (633) stops at a side of the pilot valve plug (640) facing away from the base body portion (631).

10. The pilot valve (600) for a shock absorber according to claim 9, characterized in that: There are multiple stop structures (633), and the multiple stop structures (633) are distributed at intervals along the circumference of the base guide portion (632).

11. The pilot valve (600) for a shock absorber according to claim 9, characterized in that: The base guide portion (632) includes: a first guide section (6321), one end of the first guide section (6321) being connected to the base body portion (631); a second guide section (6322), wherein the second guide section (6322) and the first guide section (6321) are arranged along the axial direction of the base (630), and the second guide section (6322) is connected to an end of the first guide section (6321) away from the base body (631); The thickness of the second guide section (6322) is smaller than the thickness of the first guide section (6321), and the stop structure (633) is constructed on the second guide section (6322).

12. The pilot valve (600) for a shock absorber according to claim 9, characterized in that: The stop structure (633) is constructed as a stop rib that extends obliquely relative to the base guide portion (632) toward the central axis of the base body portion (631).

13. The pilot valve (600) for a shock absorber according to claim 12, characterized in that: The stop rib is formed by bending a portion of the base guide portion (632), and a notch (635) is formed at a position of the base guide portion (632) corresponding to the portion.

14. The pilot valve (600) for a shock absorber according to claim 7, characterized in that: A base abutment platform (636) protruding toward the pilot valve elastic member (650) is formed in the middle of one side of the base body portion (631) facing the pilot valve elastic member (650), and a base avoidance groove (637) is formed between the base abutment platform (636) and the base guide portion (632). The radial outer side of the pilot valve elastic member (650) is spaced from the base avoidance groove (637), and the radial inner side of the pilot valve elastic member (650) abuts against the base abutment platform (636).

15. The pilot valve (600) for a shock absorber according to claim 14, characterized in that: The bottom of the base avoidance groove (637) is a circular plane; or The bottom of the base avoidance groove (637) is a conical surface that is radially outward from the base body (631) and away from the pilot valve elastic member (650).

16. The pilot valve (600) for a shock absorber according to claim 7, characterized in that: The base body (631) is provided with a base balancing hole (634).

17. The pilot valve (600) for a shock absorber according to claim 16, characterized in that: There are a plurality of base balancing holes (634), and the plurality of base balancing holes (634) are distributed at intervals in the circumferential direction of the base body portion (631).

18. The pilot valve (600) for a shock absorber according to claim 7, characterized in that: The base (630) further comprises: An annular boss (638) is provided on a side of the base body (631) away from the pilot valve elastic member (650), and a guide rod connecting groove (639) is formed on the annular boss (638).

19. The pilot valve (600) for a shock absorber according to claim 1, characterized in that: The pilot valve plug (640) comprises: A plug (641), wherein an edge of one side of the plug (641) facing the pilot valve elastic member (650) abuts against the pilot valve elastic member (650) and a plug avoidance groove (642) is formed radially inwardly of the plug; A plug head (643) is provided at a middle portion of a side of the plug plate (641) facing away from the pilot valve elastic member (650).

20. The pilot valve (600) for a shock absorber according to claim 19, characterized in that: The bottom of the plug avoidance groove (642) is a circular plane; or The bottom of the plug avoidance groove (642) is a conical surface that approaches the pilot valve elastic member (650) in an inclined manner along the radial direction outward of the plug (641).

21. A shock absorber (1), characterized in that include: Cylinder (100); A piston (200), the piston (200) being movably disposed on the cylinder (100), and the piston (200) separating a compression chamber (111) and a recovery chamber (112) within the cylinder (100); a flow regulating valve (300), the flow regulating valve (300) being disposed in the piston (200) and being in communication with the compression chamber (111) and the recovery chamber (112), respectively; A control valve (400), the control valve (400) comprising a valve core assembly (500) and a pilot valve (600) according to any one of claims 1 to 20, the valve core assembly (500) being arranged on the piston (200), the pilot valve (600) being connected to the valve core assembly (500), and the valve core assembly (500) controlling the flow regulating valve (300) via the pilot valve (600) to regulate the fluid flow between the compression chamber (111) and the recovery chamber (112).

22. A vehicle, characterized in that: Comprising a vibration damper (1) according to claim 21.

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