Flow control valve for shock absorber, shock absorber and vehicle

Abstract

The invention discloses a flow regulating valve for a shock absorber, the shock absorber and a vehicle. The flow regulating valve comprises an overflow valve seat, a valve rod and a valve rod, the overflow valve body is movably arranged on one side of the overflow valve seat, and one of the overflow valve seat and the overflow valve body is provided with a supporting column; and the valve body elastic piece is arranged between the other one of the overflow valve seat and the overflow valve body and the supporting column. According to the flow regulating valve, the overflow valve seat and the overflow valve body can be pushed to be separated through the valve body elastic piece, so that the flow regulating valve can be opened conveniently, and then the damping force of the shock absorber can be adjusted conveniently.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese patent application No. "202411402669.3" filed by BYD Co., Ltd. on September 30, 2024, entitled "Shock Absorber and Vehicle". Technical Field

[0003] The present invention relates to the technical field of vehicles, and in particular to a flow regulating valve for a shock absorber, a shock absorber and a vehicle. Background Art

[0004] The shock absorber in the related technology is usually equipped with a flow regulating valve, and the flow regulating valve includes an overflow valve seat and an overflow valve body. The flow regulating valve can adjust the flow rate flowing through the flow regulating valve by opening and closing the overflow valve seat and the overflow valve body, thereby adjusting the damping force of the shock absorber.

[0005] However, due to the unreasonable structure of the flow control valve in the related technology, when the flow control valve needs to be opened, the resistance of the fluid pushing the overflow valve body is large, the overflow valve plate is not easy to be opened, and it is not convenient to adjust the damping force of the shock absorber. Summary of the invention

[0006] 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 flow control valve for a shock absorber, which can use a valve body elastic member to push the overflow valve seat and the overflow valve body to separate, so as to open the flow control valve, thereby facilitating the adjustment of the damping force of the shock absorber.

[0007] The invention also provides a shock absorber having the flow regulating valve.

[0008] The present invention also provides a vehicle having the shock absorber.

[0009] In order to achieve the above-mentioned purpose, according to the first aspect embodiment of the present invention, a flow regulating valve for a shock absorber is proposed, comprising: an overflow valve seat; an overflow valve body, the overflow valve body being movably arranged on one side of the overflow valve seat, and one of the overflow valve seat and the overflow valve body is provided with a support column; a valve body elastic member, the valve body elastic member being arranged between the other of the overflow valve seat and the overflow valve body and the support column.

[0010] In this way, the flow regulating valve according to the embodiment of the present invention can use the valve body elastic member to push the overflow valve seat and the overflow valve body to separate, so as to open the flow regulating valve and further facilitate the adjustment of the damping force of the shock absorber.

[0011] According to some embodiments of the present invention, the overflow valve body is provided with the support column, and the end of the support column facing the overflow valve seat is constructed with a support ring, and the valve body elastic member stops at the support ring; or, the overflow valve seat is provided with the support column, and the end of the support column facing the overflow valve body is constructed with a support ring, and the valve body elastic member stops at the support ring.

[0012] According to some embodiments of the present invention, the support ring comprises: a connecting section, which is connected to the support column; a transition section, which is connected to an end of the connecting section facing away from the support column, and the outer diameter of the transition section is smaller than the outer diameter of the connecting section; wherein the valve body elastic member is sleeved on the support ring and has an interference fit with the connecting section, and there is a gap between the valve body elastic member and the transition section.

[0013] According to some embodiments of the present invention, the diameter of the support column is R, and R satisfies: 1mm<R<7mm.

[0014] According to some embodiments of the present invention, the flow regulating valve further includes: an overflow valve plate, which is movably disposed between the overflow valve body and the overflow valve seat and is sleeved on the support column so as to move axially along the overflow valve seat under the guidance of the support column.

[0015] According to some embodiments of the present invention, the overflow valve seat is constructed with a first flow channel, which is suitable for communicating with the compression chamber of the shock absorber; the overflow valve plate is constructed with an overflow channel, and when the overflow valve seat and the overflow valve body are respectively abutted against the overflow valve plate, the overflow channel is respectively communicated with the first flow channel and the recovery chamber of the shock absorber.

[0016] According to some embodiments of the present invention, a valve body abutting ring is provided on the side of the overflow valve body facing the overflow valve plate, a valve seat abutting ring is provided on the side of the overflow valve seat facing the overflow valve plate, and the valve body abutting ring and the valve seat abutting ring are staggered in the radial direction of the flow regulating valve; wherein, along the radial direction of the overflow valve plate, at least a portion of the overflow channel is located between the valve body abutting ring and the valve seat abutting ring.

[0017] According to some embodiments of the present invention, the outer diameter of the valve body abutting ring is smaller than the inner diameter of the valve seat abutting ring, and at least part of the overflow channel is located between the outer circumferential surface of the valve body abutting ring and the inner circumferential surface of the valve seat abutting ring.

[0018] According to some embodiments of the present invention, a valve body abutment surface is constructed on one side surface of the overflow valve plate facing the overflow valve body, the valve body abutment surface is suitable for abutting against the valve body abutment ring platform, and a valve body pressure-bearing surface is formed between the valve body abutment surface and the outer peripheral edge of the overflow valve plate; or, the overflow channel is constructed as an overflow hole, the overflow hole penetrates the overflow valve plate along the thickness direction of the overflow valve plate, and the overflow hole is located between the outer peripheral surface of the valve body abutment ring platform and the inner peripheral surface of the valve seat abutment ring platform; or, the overflow channel is constructed as a first overflow notch, one end of the first overflow notch extends at least between the outer peripheral surface of the valve body abutment ring platform and the inner peripheral surface of the valve seat abutment ring platform, and the other end of the first overflow notch extends along the radial direction of the overflow valve plate toward the outer peripheral edge of the overflow valve plate.

[0019] According to some embodiments of the present invention, a second overflow notch is provided on the side of the valve body abutting the ring platform facing the overflow valve plate, and the second overflow notch is connected to the first flow channel and the restoration chamber; and / or a third overflow notch is provided on the side of the valve seat abutting the ring platform facing the overflow valve plate, and the third overflow notch is connected to the first flow channel and the restoration chamber.

[0020] According to some embodiments of the present invention, the overflow valve plate includes: a main body; a guide portion, the guide portion is connected to the main body and protrudes from at least one side of the main body in the thickness direction, the guide portion and the main body jointly define a guide hole, and the overflow valve plate is suitable for being movably mounted on the supporting column through the guide hole, so that the overflow valve plate can move along the axial direction of the shock absorber under the guidance of the support column.

[0021] According to some embodiments of the present invention, along the axial direction of the overflow valve plate, the length of the guide portion is L, and the thickness of the main body is W; wherein, L and W satisfy L>2D; and / or the support column and the guide hole are clearance-matched, and the distance between the outer peripheral surface of the support column and the inner side wall of the guide hole is D, and D satisfies 0.02mm≤D≤0.15mm.

[0022] According to some embodiments of the present invention, the guide portion is disposed on one side of the main body portion in the thickness direction; or, the guide portion is multiple, and the multiple guide portions include a first guide portion and a second guide portion, the first guide portion is disposed on one side of the main body portion in the thickness direction, and the second guide portion is disposed on the other side of the main body portion in the thickness direction.

[0023] According to some embodiments of the present invention, the flow regulating valve also includes: a magnetic component, which is arranged on the overflow valve seat and generates a magnetic force to attract the overflow valve plate; a magnetic adjustment component, which is arranged on one side of the magnetic component and is used to adjust the magnetic force of the magnetic component on the overflow valve plate.

[0024] According to some embodiments of the present invention, the magnetic adjustment component is arranged on the side of the magnetic component facing the overflow valve plate, and the magnetic adjustment component is used to block the magnetic attraction of the magnetic component on the overflow valve plate to adjust the magnetic attraction of the magnetic component on the overflow valve plate; or, the magnetic adjustment component is arranged between the magnetic component and the overflow valve seat, and the magnetic adjustment component is used to adjust the minimum distance between the magnetic component and the overflow valve plate to adjust the magnetic attraction of the magnetic component on the overflow valve plate; or, the magnetic adjustment component includes at least one magnetic The magnetic force adjusting plate is a stacked arrangement of at least one magnetic force adjusting plate, and the magnetic force adjusting plate adjusts the magnetic attraction of the magnetic suction member to the overflow valve plate by adjusting the number of the magnetic force adjusting plates, and there are multiple magnetic force adjusting plates, and an adsorption gap is formed between two adjacent magnetic force adjusting plates or between the magnetic force adjusting plate and the magnetic suction member; or, the magnetic force adjusting member includes a magnetic force adjusting block, and the magnetic force adjusting block adjusts the magnetic attraction of the magnetic suction member to the overflow valve plate by adjusting its own height along the axial direction of the overflow valve seat, and the magnetic force adjusting block is provided with an adsorption hole.

[0025] According to some embodiments of the present invention, the overflow valve seat is configured with at least one flow channel hole, the magnetic attraction member is adjacent to the flow channel hole, and the flow channel hole is configured as an arc-shaped flow channel hole extending around the magnetic attraction member.

[0026] According to some embodiments of the present invention, it also includes: a limit member, which is arranged on the support column and located on the side of the magnetic component adjacent to the overflow valve plate to limit the magnetic component and the overflow valve plate; wherein the support column is formed with a slot, and the limit member is snapped into the slot.

[0027] According to some embodiments of the present invention, the overflow valve body is provided with the support column, and the end of the support column facing the overflow valve seat is constructed as a guide section, and the cross-sectional area of ​​the guide section decreases along the axial direction of the support column as it approaches the overflow valve seat; or, the overflow valve seat is provided with the support column, and the end of the support column facing the overflow valve body is constructed as a guide section, and the cross-sectional area of ​​the guide section decreases along the axial direction of the support column as it approaches the overflow valve body.

[0028] According to some embodiments of the present invention, the overflow valve body is provided with the support column, and as the support column approaches the overflow valve seat in the axial direction, the gap between the overflow valve plate and the guide section increases; or, the overflow valve seat is provided with the support column, and as the support column approaches the overflow valve body in the axial direction, the gap between the overflow valve plate and the guide section increases.

[0029] According to some embodiments of the present invention, the overflow valve seat includes: a first seat body, the overflow valve plate is arranged between the first seat body and the overflow valve body; a second seat body, the second seat body is supported on the side of the first seat body facing away from the overflow valve plate, and the second seat body is suitable for connecting to the piston of the shock absorber; wherein, one of the first seat body and the second seat body constructs the support column.

[0030] According to some embodiments of the present invention, the first seat body and the second seat body jointly define a first flow channel, and the first flow channel is suitable for being connected to the compression chamber of the shock absorber; a second flow channel is formed between the overflow valve plate and the overflow valve body, and a third flow channel is formed between the overflow valve plate and the overflow valve seat, and the second flow channel and the third flow channel are respectively connected to the recovery chamber of the shock absorber and the first flow channel; wherein, the second flow channel and / or the third flow channel are opened and closed by the movement of the overflow valve body.

[0031] According to some embodiments of the present invention, the first seat body is configured with a through hole, the second seat body is configured with at least one flow channel hole, and the second seat body is configured with the support column, and the support column extends into the through hole; wherein the through hole and the flow channel hole constitute the first flow channel; and / or the overflow valve plate is configured with at least one connecting hole, and the second flow channel is connected to the first flow channel through the connecting hole.

[0032] According to some embodiments of the present invention, the overflow valve seat includes: a valve seat abutting ring, which is arranged on the side of the overflow valve seat facing the overflow valve body; a valve seat guide surface, which is arranged on the side of the overflow valve seat facing the overflow valve body, and the valve seat guide surface is located radially outside the valve seat abutting ring.

[0033] According to some embodiments of the present invention, along the radial direction of the overflow valve seat, the distance between any point of the valve seat guide surface and the radial outer side of the valve seat abutting ring platform is X; along the axial direction of the overflow valve seat, the distance between any point of the valve seat guide surface and one end of the valve seat abutting ring platform facing the overflow valve body is Y; X and Y satisfy: Y / X>0.5; and / or along the radial direction of the overflow valve seat, the radial thickness of the valve seat abutting ring platform is T, and T satisfies: 0.15<T≤0.2mm; and / or, the flow regulating valve also includes an overflow valve plate, which is movably arranged between the overflow valve body and the overflow valve seat, and the overflow valve plate abuts against the valve seat abutting ring platform; wherein, along the radial outward direction of the overflow valve seat, the outer circumferential surface of the overflow valve plate exceeds the outer circumferential surface of the valve seat abutting ring platform by a distance A, and A satisfies 0.15mm≤A≤0.5mm.

[0034] According to some embodiments of the present invention, the valve seat guide surface includes: a first step surface, the first step surface is connected to the radial outer side of the valve seat abutting ring platform and extends radially along the overflow valve seat, and the valve seat abutting ring platform exceeds the first step surface in the direction close to the overflow valve body; a second step surface, the second step surface is connected to the radial outer side of the first step surface and extends radially along the overflow valve seat, and the first step surface exceeds the second step surface in the direction close to the overflow valve body; or, the valve seat guide surface includes: a third step surface, the third step surface is connected to the radial outer side of the valve seat abutting ring platform and extends radially along the overflow valve seat, and the valve seat abutting ring platform exceeds the third step surface in the direction close to the overflow valve body; an inclined surface, the inclined surface is connected to the radial outer side of the third step surface, And along the radial outward direction of the overflow valve seat, the inclined surface gradually moves away from the overflow valve body; or, the valve seat guide surface includes an inclined surface, which is connected to the radial outer side of the valve seat abutting ring platform, and along the radial outward direction of the overflow valve seat, the inclined surface gradually moves away from the overflow valve body; wherein, along the axial direction of the overflow valve seat approaching the overflow valve body, the valve seat abutting ring platform exceeds one end of the inclined surface adjacent to the overflow valve body; or, the valve seat guide surface includes an inclined surface, which is connected to the radial outer side of the valve seat abutting ring platform, and along the radial outward direction of the overflow valve seat, the inclined surface gradually moves away from the overflow valve body; wherein, along the axial direction of the overflow valve seat, one end of the inclined surface adjacent to the overflow valve body is flush with one end of the valve seat abutting ring platform facing the overflow valve body.

[0035] According to some embodiments of the present invention, along the axial direction of the overflow valve seat approaching the overflow valve body, the dimension of the valve seat abutting ring platform beyond the valve seat guide surface adjacent to the overflow valve body is B, and B satisfies: 0.4mm≤B≤0.6mm.

[0036] According to some embodiments of the present invention, an angle between the inclined surface and a radial direction of the overflow valve seat is β, and β satisfies: 35°≤β≤55°.

[0037] According to a second aspect of the present invention, a shock absorber is provided, comprising: a cylinder; a piston, the piston is movably arranged in the cylinder, and the piston separates a compression chamber and a recovery chamber in the cylinder; according to the flow regulating valve described in the first aspect of the present invention, the flow regulating valve is arranged in the piston and is respectively connected with the compression chamber and the recovery chamber; a control valve, the control valve is arranged in the piston, the control valve comprises a valve core assembly and a pilot valve, 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.

[0038] The shock absorber described in the embodiment of the second aspect of the present invention, by utilizing the flow regulating valve described in the embodiment of the first aspect of the present invention, the flow regulating valve can utilize the valve body elastic member to push the overflow valve seat and the overflow valve body to separate, so as to facilitate opening the flow regulating valve, and further facilitate adjusting the damping force of the shock absorber.

[0039] According to some embodiments of the present invention, the pilot valve includes: a base, one side of the base is connected to the valve core assembly; 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 to keep the pilot valve plug away from the base.

[0040] 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, whose outer end is connected to the outer ring body, and whose inner end abuts against the base; wherein, there are multiple inner elastic arms, and the multiple inner elastic arms are arranged at intervals along the circumference of the outer ring body, and the width of the inner elastic arm decreases in the radial inward direction along the outer ring body.

[0041] 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 to 50N to the pilot valve plug.

[0042] 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.

[0043] According to some embodiments of the present invention, the base flow guide portion is configured in a ring shape, and the pilot valve plug and the pilot valve elastic member are located in an inner ring of the base flow guide portion.

[0044] According to some embodiments of the present invention, the base guide portion is constructed with a stop structure, and the stop structure stops at the side of the pilot valve plug facing away from the base body portion; wherein, there are multiple stop structures, and the multiple stop structures are distributed at circumferential intervals along the base guide portion.

[0045] 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 one end of the first guide section away from the base body portion; wherein the thickness of the second guide section is less than the thickness of the first guide section, and the stop structure is constructed on the second guide section; and / or, the stop structure is constructed as a stop rib extending obliquely relative to the base guide portion toward the central axis of the base body portion, 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.

[0046] 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 one side of the base body portion 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.

[0047] According to some embodiments of the present invention, the base body is provided with a base balancing hole, and the base balancing holes are multiple, and the multiple base balancing holes are distributed at intervals in the circumferential direction of the base body.

[0048] 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 a side of the plug plate facing away from the pilot valve elastic member.

[0049] According to some embodiments of the present invention, the pilot valve includes: a main body, which is connected to the valve core assembly and cooperates with the flow regulating valve; a guide portion, which extends along the circumference of the main body and extends from the outer periphery of the main body to a side close to the flow regulating valve.

[0050] According to some embodiments of the present invention, the main body is provided with a sealing protrusion, the sealing protrusion protrudes from a side of the main body facing the flow regulating valve, and the sealing protrusion cooperates with the flow regulating valve.

[0051] According to some embodiments of the present invention, the main body is further provided with a body balancing hole, which penetrates the main body along the axial direction of the pilot valve, and is located between the guide portion and the sealing protrusion along the radial direction of the main body; wherein, there are multiple body balancing holes, and the multiple body balancing holes are arranged at intervals along the circumferential direction of the main body; and / or, along the axial direction of the pilot valve, the sealing protrusion protrudes from the guide portion; and / or, a side surface of the main body facing the flow regulating valve forms a body guide surface between the sealing protrusion and the guide portion; wherein, along the axial direction of the pilot valve extending away from the main body, the body guide surface is constructed as a truncated conical surface with a decreasing cross-sectional area.

[0052] According to some embodiments of the present invention, the overflow valve body is provided with a first flow channel of the valve body and a second flow channel of the valve body, the first flow channel of the valve body is connected with the recovery chamber, and the second flow channel of the valve body is connected with the compression chamber, and the sealing protrusion cooperates with the first flow channel of the valve body to control the opening and closing of the first flow channel of the valve body and the second flow channel of the valve body; wherein, the inner diameter of the end of the first flow channel of the valve body facing the pilot valve is d1, and the inner diameter of the guide part is d2; the radial outer side of the sealing protrusion and the axial direction of the pilot valve are at an angle of; along the axial direction of the pilot valve, the length of the guide part exceeding the main body in the direction close to the overflow valve body is h; h, d1, d2 and satisfy: h.

[0053] According to some embodiments of the present invention, a projection of the main body portion on the relief valve body along the axial direction of the cylinder at least covers a portion of the second flow channel of the valve body.

[0054] According to some embodiments of the present invention, the valve core assembly includes: a valve core, which is movably disposed in the piston of the shock absorber; a static iron core, which is disposed on the side of the valve core facing the flow regulating valve, and a sink groove is provided on the side of the static iron core facing the valve core; wherein, when the flow regulating valve is in an open valve state at an initial position, along the axial direction of the valve core assembly, the side of the valve core facing the static iron core is located in the sink groove, and along the axial direction of the valve core assembly, the distance between the side of the valve core facing the static iron core and the bottom wall of the sink groove is L2, and L2 satisfies: 2mm>L2>0.7mm.

[0055] According to some embodiments of the present invention, when the flow regulating valve is in an open state at the initial position, along the axial direction of the valve core assembly, the distance between the side of the valve core facing the static iron core and the notch of the sink groove is L1, and L1 satisfies: 0.5mm>L1>0.1mm.

[0056] According to some embodiments of the present invention, the outer diameter of the valve core is D1, the inner diameter of the sink is D2, and the depth of the sink is L; wherein, when the valve core moves toward the static iron core, the distance between the inner wall of the sink and the outer peripheral wall of the valve core remains unchanged, so that (D2-D1)×L remains unchanged; or, when the valve core moves toward the static iron core, the distance between the inner wall of the sink and the outer peripheral wall of the valve core gradually increases, so that (D2-D1)×L gradually increases.

[0057] According to some embodiments of the present invention, the valve core assembly also includes: a coil assembly, which is disposed in the piston, and when the coil assembly is energized, the valve core generates magnetism and attracts the static iron core; a guide rod, which is movably penetrated through the static iron core, and the guide rod is penetrated through the valve core and connected to the valve core.

[0058] According to some embodiments of the present invention, the valve core assembly also includes: a first valve core elastic member and a second valve core elastic member, the first valve core elastic member and the second valve core elastic member are sleeved on the guide rod and are respectively arranged on both sides of the moving direction of the valve core, and the first valve core elastic member and the second valve core elastic member jointly apply elastic force to the valve core to keep the position of the valve core stable.

[0059] According to some embodiments of the present invention, a first groove and a second groove are provided at both axial ends of the valve core, the first valve core elastic member is provided in the first groove and abuts against the bottom of the first groove and the iron core cover of the shock absorber, and the second valve core elastic member is provided in the second groove and abuts against the bottom of the second groove and the static iron core.

[0060] According to some embodiments of the present invention, the valve core is provided with a valve core balancing flow channel, and the valve core balancing flow channel penetrates through opposite sides of the valve core along the axial direction of the valve core.

[0061] According to some embodiments of the present invention, the piston includes: a piston rod; a piston valve assembly, wherein the piston valve assembly separates the compression chamber and the recovery chamber in the cylinder; a valve body, wherein the piston valve assembly and the piston rod are connected via the valve body, the flow regulating valve is installed in the valve body, and the control valve extends into the valve body and cooperates with the flow regulating valve.

[0062] According to some embodiments of the present invention, the flow regulating valve includes an overflow valve plate, the overflow valve body is movably disposed in the piston, and the overflow valve plate is movably disposed between the overflow valve seat and the overflow valve body; wherein, the valve body is provided with a sealing ring platform, and the end of the overflow valve body facing away from the overflow valve seat is provided with a sealing groove, the sealing ring platform extends into the sealing groove and cooperates with the sealing groove in a dynamic seal; and, a valve seat abutting ring platform is provided on the side of the overflow valve seat facing the overflow valve plate, the valve seat abutting ring platform abuts the overflow valve plate, and the inner diameter of the valve seat abutting ring platform is larger than the inner diameter of the sealing groove.

[0063] According to some embodiments of the present invention, the inner cross-sectional area of ​​the valve seat abutting ring platform is S1, the inner cross-sectional area of ​​the sealing groove is S2, S1 and S2 satisfy: 1.05×S2≤S1≤1.3×S2; and / or, along the radial direction of the shock absorber, the sealing ring platform and the inner side wall of the valve body are spaced apart, the overflow valve body is dynamically sealed with the inner side wall of the valve body, and the sealing groove is dynamically sealed with the outer side wall of the sealing ring platform.

[0064] According to some embodiments of the present invention, the overflow valve body is movably disposed in the valve body, the outer wall of the overflow valve body, the inner wall of the valve body and the outer wall of the sealing ring platform define a first chamber, and the sealing groove and the inner wall of the sealing ring platform define a second chamber, and the control valve extends into the second chamber to control the opening and closing of the first chamber and the second chamber.

[0065] According to some embodiments of the present invention, the overflow valve seat is provided with a first flow channel, a second flow channel is formed between the overflow valve plate and the overflow valve body, and a third flow channel is formed between the overflow valve plate and the overflow valve seat; the side wall of the valve body is provided with a fourth flow channel and a fifth flow channel, the fourth flow channel is respectively connected to the first chamber and the restoration chamber, one end of the fifth flow channel is connected to the restoration chamber, and the other end is respectively connected to the second flow channel and the third flow channel; and the overflow valve body is constructed with a valve body first flow channel and a valve body second flow channel, one end of the valve body first flow channel is connected to the first chamber, the other end of the valve body first flow channel is connected to the second chamber and the control valve is matched with the other end of the valve body first flow channel, the end of the valve body second flow channel facing away from the overflow valve seat is connected to the second chamber, and the other end of the valve body second flow channel is connected to the first flow channel, and the fluid flow of the valve body first flow channel and the fluid flow of the valve body second flow channel are controlled by the opening and closing of the control valve.

[0066] According to some embodiments of the present invention, the valve body includes: an upper valve body, the upper valve body is connected to the piston rod, the overflow valve body is movably arranged in the upper valve body, the upper valve body is provided with the sealing ring platform, and the overflow valve body and the upper valve body define the first chamber and the second chamber; a lower valve body, the lower valve body is connected between the piston valve assembly and the upper valve body, and the overflow valve seat is arranged in the lower valve body; wherein the side wall of the upper valve body is provided with the fourth flow channel, and the side wall of the lower valve body is provided with the fifth flow channel.

[0067] According to some embodiments of the present invention, the control valve also includes: a core cover, which is fixed in the piston rod; a magnetic isolation ring, which is installed in the piston rod, and the magnetic isolation ring is located between the core cover and the valve body and separates the coil assembly of the valve core assembly and the valve body.

[0068] According to some embodiments of the present invention, a mounting recess is provided on the top of the core cover, a second guide sleeve is provided in the mounting recess, and a guide rod of the valve core assembly passes through the second guide sleeve.

[0069] According to some embodiments of the present invention, the inner circumference of the core cover is provided with a first step portion, the outer circumference of the valve core is provided with a second step portion, and the first step portion stops at a side of the second step portion facing the core cover.

[0070] According to a third aspect of the present invention, a vehicle is provided. The vehicle comprises the shock absorber according to the second aspect of the present invention.

[0071] According to the vehicle described in the third aspect embodiment of the present invention, by utilizing the shock absorber described in the second aspect embodiment of the present invention, the flow regulating valve can utilize the valve body elastic member to push the overflow valve seat and the overflow valve body to separate, so as to facilitate opening of the flow regulating valve, and further facilitate adjustment of the damping force of the shock absorber.

[0072] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0073] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0074] Figure 1 is a schematic structural diagram of a shock absorber according to an embodiment of the present invention;

[0075] Figure 2 is a structural schematic diagram of a recovery working condition when the flow control valve according to an embodiment of the present invention is in an open valve state;

[0076] Figure 3 is a structural schematic diagram of a compression condition when a flow control valve according to an embodiment of the present invention is in an open valve state;

[0077] Figure 4 is a structural schematic diagram of a recovery working condition when the flow control valve according to an embodiment of the present invention is in a valve closing state;

[0078] Figure 5 is a structural schematic diagram of a compression condition when a flow control valve according to an embodiment of the present invention is in a valve closing state;

[0079] Figure 6 is a cross-sectional view of a valve core assembly according to an embodiment of the present invention;

[0080] Figure 7 is a cross-sectional view of a valve body and a flow regulating valve of a shock absorber according to an embodiment of the present invention;

[0081] Figure 8 yes Figure 7 Detailed view of C;

[0082] Fig. 9 is an exploded view of a flow control valve according to an embodiment of the present invention;

[0083] Fig.10 is a cross-sectional view of an explosion of a flow control valve according to an embodiment of the present invention;

[0084] Fig.11 is a cross-sectional view of the flow control valve according to an embodiment of the present invention when the second flow channel is opened;

[0085] Fig.12 yes Fig.11 Detailed view of D;

[0086] Fig.13 is a cross-sectional view of the flow control valve according to an embodiment of the present invention when the third flow channel is opened;

[0087] Fig.14 is a cross-sectional view of a flow control valve according to an embodiment of the present invention;

[0088] Fig.15 is a schematic structural diagram of a relief valve plate according to an embodiment of the present invention;

[0089] Fig.16 is a cross-sectional view of a relief valve plate according to an embodiment of the present invention;

[0090] Fig.17 is a cross-sectional view of a flow control valve according to another embodiment of the present invention;

[0091] Fig.18 is a schematic structural diagram of a relief valve plate according to another embodiment of the present invention;

[0092] Fig.19 is a cross-sectional view of a relief valve plate according to another embodiment of the present invention;

[0093] Fig. 20 is a cross-sectional view of a flow control valve according to yet another embodiment of the present invention;

[0094] Fig.21 is a schematic structural diagram of a relief valve body according to an embodiment of the present invention;

[0095] Fig. 22 is a schematic structural diagram of a relief valve body according to another perspective of an embodiment of the present invention;

[0096] Fig.23 is a cross-sectional view of a relief valve body according to an embodiment of the present invention;

[0097] Fig.24 is a schematic diagram of assembling a second seat body and a magnetic attraction member of a relief valve seat according to an embodiment of the present invention;

[0098] Fig.25 is an exploded view of a second seat body and a magnetic attraction member of a relief valve seat according to an embodiment of the present invention;

[0099] Fig.26 is a cross-sectional view of a second seat body and a magnetic attraction member of a relief valve seat according to an embodiment of the present invention;

[0100] Fig. 27 is a cross-sectional view of a second seat body and a magnetic attraction member of a relief valve seat according to another embodiment of the present invention;

[0101] Fig.28 is a cross-sectional view of a second seat body and a magnetic attraction member of a relief valve seat according to yet another embodiment of the present invention;

[0102] Fig.29 is a structural schematic diagram of a first seat body of a relief valve seat according to an embodiment of the present invention;

[0103] Fig.30 is a cross-sectional view of a first seat body of a relief valve seat according to a first embodiment of the present invention;

[0104] Fig.31 is a cross-sectional view of a first seat body of a relief valve seat according to a second embodiment of the present invention;

[0105] Fig.32 is a cross-sectional view of a first seat body of a relief valve seat according to a third embodiment of the present invention;

[0106] Fig.33 is a cross-sectional view of a first seat body of a relief valve seat according to a fourth embodiment of the present invention;

[0107] Fig.34 is a schematic structural diagram of a relief valve plate according to an embodiment of the present invention;

[0108] Fig.35 is a cross-sectional view of a relief valve plate according to an embodiment of the present invention;

[0109] Fig.36 is a schematic structural diagram of a pilot valve according to an embodiment of the present invention;

[0110] Fig.37 is a schematic structural diagram of a pilot valve according to an embodiment of the present invention from another perspective;

[0111] Fig.38 is a structural schematic diagram of a pilot valve according to an embodiment of the present invention from another perspective;

[0112] Fig.39 is a cross-sectional view of a pilot valve according to an embodiment of the present invention;

[0113] Fig.40 is a schematic diagram of the principle of fluid being diverted by a pilot valve stop according to an embodiment of the present invention;

[0114] Fig.41 Schematic diagram of the structure of a pilot valve according to another embodiment of the present invention

[0115] Fig.42 is a schematic structural diagram of a pilot valve from another perspective according to another embodiment of the present invention

[0116] Fig.43is a cross-sectional view of a pilot valve according to another embodiment of the present invention;

[0117] Fig.44 is an exploded view of a pilot valve according to another embodiment of the present invention;

[0118] Fig.45 is an exploded cross-sectional view of a pilot valve according to another embodiment of the present invention;

[0119] Fig.46 is a structural schematic diagram of a base of a pilot valve according to an embodiment of the present invention;

[0120] Fig.47 is a schematic structural diagram of a pilot valve elastic member of a pilot valve according to an embodiment of the present invention;

[0121] Fig.48 is a structural schematic diagram of a pilot valve elastic member of a pilot valve according to an embodiment of the present invention from another perspective;

[0122] Fig.49 is a schematic structural diagram of a pilot valve plug of a pilot valve according to an embodiment of the present invention;

[0123] Fig.50 is a schematic structural diagram of a pilot valve plug of a pilot valve according to an embodiment of the present invention from another perspective;

[0124] Fig.51 is a cross-sectional view of a pilot valve plug of a pilot valve according to an embodiment of the present invention;

[0125] Fig.52 is a structural schematic diagram of an upper valve body according to an embodiment of the present invention;

[0126] Fig.53 is a structural schematic diagram of an upper valve body from another perspective according to an embodiment of the present invention;

[0127] Fig.54 is a cross-sectional view of an upper valve body according to an embodiment of the present invention;

[0128] Fig.55 is a schematic structural diagram of a lower valve body according to an embodiment of the present invention;

[0129] Fig.56 is a cross-sectional view of a lower valve body according to an embodiment of the present invention.

[0130] Reference numerals:

[0131] 1. Shock absorber;

[0132] 100, cylinder; 110, inner cylinder; 111, compression chamber; 112, recovery chamber; 120, outer cylinder; 121, liquid storage chamber; 130, bottom valve assembly;

[0133] 200, piston; 210, piston rod; 220, piston valve assembly; 230, valve body; 240, upper valve body; 241, first chamber; 242, second chamber; 243, fourth flow channel; 244, sealing ring platform; 250, lower valve body; 251, fifth flow channel; 252, first limit step; 253, third chamber;

[0134] 300, flow control valve;

[0135] 310, overflow valve body; 311, second flow channel; 312, valve body abutting ring platform; 313, third overflow notch; 314, valve body first flow channel; 314a, radial section; 314b, axial section; 315, valve body second flow channel; 316, sealing sink groove; 317, limiting ring groove;

[0136] 320, overflow valve seat; 321, first flow channel; 322, third flow channel; 323, first seat body; 3231, through hole; 324, second seat body; 3241, flow channel hole; 325, valve seat abutting ring platform; 326, valve seat guide surface; 3261, inclined surface; 3262, third step surface; 327, second limit step; 328, first step surface; 329, second step surface;

[0137] 330, overflow valve plate; 331, connecting hole; 332, main body; 3321, second fillet surface; 333, guide part; 3331, first fillet surface; 334, guide hole; 335, valve body abutting surface; 336, valve body pressure-bearing surface; 337, valve seat abutting surface; 338, valve seat pressure-bearing surface; 339, overflow hole; 340, support column; 341, support ring platform; 342, connecting section; 343, transition section; 344, slot; 345, guide section; 350, magnetic suction member; 351, magnetic adjustment sheet; 352, magnetic adjustment member; 360, valve body elastic member; 370, overflow channel; 371, first overflow notch; 380, limit member;

[0138] 400, control valve; 410, coil assembly; 420, magnetic isolation ring; 430, static iron core; 432, sink;

[0139] 500, valve core assembly; 510, iron core cover; 511, mounting sink; 512, second guide sleeve; 513, first step portion; 520, valve core; 521, valve core balancing flow channel; 522, first groove; 523, second groove; 524, second step portion; 530, guide rod; 531, first guide sleeve; 540, first valve core elastic member; 550, second valve core elastic member;

[0140] 600, pilot valve; 610, main body; 611, main body balancing hole; 612, sealing protrusion; 613, main body guide surface; 620, guide part; 630, base; 631, base main body; 632, base guide part; 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

[0141] Embodiments of the present invention are described in detail below, examples of which 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 only used to explain the present invention, and cannot be understood as limiting the present invention.

[0142] 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 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, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0143] In the description of the present invention, "first feature" or "second feature" may include one or more of the features.

[0144] In the description of the present invention, "plurality" means two or more than two, and "several" means one or more.

[0145] A vibration absorber 1 according to an embodiment of the present invention will be described below with reference to the drawings.

[0146] 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 .

[0147] The piston 200 is movably disposed on 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 on the piston 200. 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.

[0148] The compression chamber 111 and the recovery chamber 112 may store fluid, such as fluid with a certain pressure and inert gas.

[0149] 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 a compression chamber 111 and a 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, and 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.

[0150] It should be noted that, in the present invention, the flow regulating valve 300 is in an open valve state, which refers to the state of the flow regulating valve 300 when there is no external pressure squeezing the flow regulating valve 300, for example, the valve core assembly 500 has no force on the flow regulating valve 300; and, the flow regulating valve 300 is in a closed valve state, which refers to the state of the flow regulating valve 300 when the flow regulating valve 300 is squeezed by an external force, for example, the valve core assembly 500 applies a force to the flow regulating valve 300.

[0151] 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.

[0152] 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.

[0153] 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 vibration force transmitted to the other object can be reduced by the presence of the shock absorber 1, thereby achieving a vibration reduction effect.

[0154] In addition, the control valve 400 is disposed on 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 .

[0155] 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 ride comfort and handling stability of the vehicle.

[0156] 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.

[0157] 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 restoring chamber 112, which is beneficial to improving the riding comfort and the handling performance of the vehicle. In addition, the shock absorber 1 has a simple structure and is easy to adjust.

[0158] The flow control valve 300 according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0159] like Figure 1 and Figure 7 As shown, the flow control valve 300 includes a relief valve seat 320 , a relief valve body 310 and a valve body elastic member 360 .

[0160] The overflow valve body 310 is movably disposed on one side of the overflow valve seat 320 , and one of the overflow valve seat 320 and the overflow valve body 310 is provided with a support column 340 , and the valve body elastic member 360 is disposed between the other of the overflow valve seat 320 and the overflow valve body 310 and the support column 340 .

[0161] The valve body elastic member 360 in the present invention is the first elastic member in the priority application.

[0162] Among them, one of the overflow valve body 310 and the overflow valve seat 320 is provided with a support column 340, which means that the support column 340 can be provided on the side of the overflow valve body 310 facing the overflow valve seat 320, or the support column 340 can be provided on the side of the overflow valve seat 320 facing the overflow valve body 310.

[0163] It can be understood that the valve body elastic member 360 can provide an elastic force to push the overflow valve body 310 to separate from the overflow valve seat 320 .

[0164] In this way, when the flow regulating valve 300 is open, the valve body elastic member 360 can assist in pushing the overflow valve seat 320 and the overflow valve body 310 to separate, so that the flow regulating valve 300 is easier to open. At this time, the flow rate of the fluid flowing through the flow regulating valve 300 in the compression chamber 111 and the recovery chamber 112 is larger, and the damping of the shock absorber 1 is smaller. The shock absorber 1 can appear "soft" and the ride comfort is better.

[0165] Thus, the flow control valve 300 according to the embodiment of the present invention can use the valve body elastic member 360 to push the overflow valve seat 320 and the overflow valve body 310 to separate, so as to open the flow control valve 300, thereby facilitating the adjustment of the damping force of the shock absorber 1.

[0166] In addition, if Figure 1 and Figure 7 As shown, the flow regulating valve 300 includes a relief valve body 310 , a relief valve seat 320 and a relief valve plate 330 . The relief valve plate 330 is movably disposed between the relief valve body 310 and the relief valve seat 320 , and the relief valve plate 330 is sleeved on the support column 340 .

[0167] When the overflow valve body 310 and the overflow valve seat 320 are respectively in contact with the overflow valve plate 330, the flow regulating valve 300 is closed; and when at least one of the overflow valve body 310 and the overflow valve seat 320 is separated from the overflow valve plate 330, the flow regulating valve 300 is opened.

[0168] Specifically, the relief valve body 310 is movably installed in the piston 200, the relief valve seat 320 is installed in the piston 200 and is located on the side of the relief valve body 310 facing away from the control valve 400, the relief valve seat 320 is provided with a first flow channel 321, the first flow channel 321 is communicated with the compression chamber 111, the relief valve plate 330 is movably arranged between the relief valve body 310 and the relief valve seat 320, a second flow channel 311 is formed between the relief valve plate 330 and the relief valve body 310, and a third flow channel 322 is formed between the relief valve plate 330 and the relief valve seat 320, the second flow channel 311 and the third flow channel 322 are respectively communicated with the first flow channel 321 and are both communicated with the recovery chamber 112. Among them, the second flow channel 311 and / or the third flow channel 322 can be opened and closed by the movement of the relief valve body 310.

[0169] Among them, when the second flow channel 311 is opened, the fluid between the compression chamber 111 and the recovery chamber 112 can flow through the first flow channel 321 and the second flow channel 311; when the third flow channel 322 is opened, the fluid between the compression chamber 111 and the recovery chamber 112 can flow through the first flow channel 321 and the third flow channel 322; when the second flow channel 311 and the third flow channel 322 are both opened, the fluid between the compression chamber 111 and the recovery chamber 112 can flow through the first flow channel 321 and the second flow channel 311, and can flow through the first flow channel 321 and the third flow channel 322.

[0170] By dividing the flow regulating valve 300 into the overflow valve body 310, the overflow valve plate 330 and the overflow valve seat 320, the control valve 400 can control the relative movement of the overflow valve body 310 relative to the overflow valve seat 320, so that the second flow channel 311 and the third flow channel 322 can be closed. At this time, the fluid in the recovery chamber 112 and the compression chamber 111 cannot flow through the first flow channel 321 and the second flow channel 311 or the third flow channel 322; or, the second flow channel 311 and / or the third flow channel 322 can be opened so that the fluid in the recovery chamber 112 and the compression chamber 111 can flow through the first flow channel 321 and the second flow channel 311 and / or the third flow channel 322, and by controlling the opening and closing size of the second flow channel 311 and / or the third flow channel 322, the flow rate of the fluid between the compression chamber 111 and the recovery chamber 112 can be changed to adjust the damping force of the shock absorber 1, and the pressure between the compression chamber 111 and the recovery chamber 112 can be balanced.

[0171] In addition, by adding a movable overflow valve plate 330 between the overflow valve body 310 and the overflow valve seat 320, when the flow regulating valve 300 is in the closed state and the shock absorber 1 is in the recovery state, the overflow valve body 310 and the overflow valve seat 320 can first abut on the opposite sides of the overflow valve plate 330, and the fluid can push open the overflow valve body 310, and the overflow valve body 310 and the overflow valve plate 330 move relative to each other, and the second flow channel 311 is opened. At this time, the fluid in the recovery chamber 112 can pass through the second flow channel 311 and the first flow channel 321. Flows into the compression chamber 111; when the flow regulating valve 300 is in the closed state and the shock absorber 1 is in the compression condition, the overflow valve body 310 and the overflow valve seat 320 can first abut against the opposite sides of the overflow valve plate 330, and the fluid can push open the overflow valve body 310 and the overflow valve plate 330, that is, the overflow valve plate 330 and the overflow valve body 310 move together relative to the overflow valve seat 320, and the third flow channel 322 opens. At this time, the fluid in the compression chamber 111 can flow into the recovery chamber 112 through the third flow channel 322 and the first flow channel 321.

[0172] With such an arrangement, when the shock absorber 1 is in a compression condition or a recovery condition, the overflow valve body 310 and the overflow valve seat 320 can be more easily moved relative to each other, that is, the overflow valve plate 330 can assist in opening the overflow valve body 310 and the overflow valve seat 320 to facilitate the connection between the compression chamber 111 and the recovery chamber 112.

[0173] In some specific embodiments of the present invention, Figure 7 , Fig.15 and Fig.18 As shown, the overflow valve plate 330 is configured with at least one communicating hole 331 , and the second flow channel 311 is communicated with the first flow channel 321 through the communicating hole 331 .

[0174] In this way, when the overflow valve body 310 is separated from the overflow valve plate 330 and the overflow valve seat 320 is in contact with the overflow valve plate 330, that is, the second flow channel 311 is opened and the third flow channel 322 is closed, the second flow channel 311 can be connected with the first flow channel 321 through the connecting hole 331, and the structural setting is more reasonable, so that the fluid in the recovery chamber 112 and the compression chamber 111 can flow through the second flow channel 311, the connecting hole 331 and the first flow channel 321.

[0175] In addition, there may be a plurality of communicating holes 331 , and the plurality of communicating holes 331 may be arranged at intervals along the circumferential direction of the overflow valve plate 330 .

[0176] In some specific embodiments of the present invention, Fig.11 and Fig.13As shown, the overflow valve body 310 is provided with a support column 340, and the end of the support column 340 facing the overflow valve seat 320 is constructed with a support ring 341, and the valve body elastic member 360 stops at the support ring 341; or, the overflow valve seat 320 is provided with a support column 340, and the end of the support column 340 facing the overflow valve body 310 is constructed with a support ring 341, and the valve body elastic member 360 stops at the support ring 341.

[0177] That is to say, the free end of the support column 340 can be constructed with a support ring 341, and the outer diameter of the support ring 341 is smaller than the outer diameter of the rest of the support column 340. In this way, the valve body elastic part 360 can be mounted on the support ring 341 to pre-position the valve body elastic part 360 and the support column 340, which is beneficial to improve the installation accuracy of the valve body elastic part 360.

[0178] In addition, the other one of the overflow valve body 310 and the overflow valve seat 320 can be constructed with a limiting ring groove 317. For example, the support column 340 is constructed on the overflow valve seat 320, and the side of the overflow valve body 310 facing the overflow valve seat 320 can be constructed with a limiting ring groove 317, and the end of the valve body elastic member 360 facing the overflow valve seat 320 can be arranged in the limiting ring groove 317. In this way, the limiting ring groove 317 can be used to limit the position between the valve body elastic member 360 and the overflow valve body 310, thereby further improving the installation accuracy of the valve body elastic member 360.

[0179] Furthermore, if Fig.13 As shown, the support ring 341 includes a connecting section 342 and a transition section 343 .

[0180] The connecting section 342 is connected to the supporting column 340, and the transition section 343 is connected to the end of the connecting section 342 facing away from the supporting column 340, and the outer diameter of the transition section 343 is smaller than the outer diameter of the connecting section 342. The valve body elastic member 360 is sleeved on the supporting ring platform 341 and has an interference fit with the connecting section 342, and there is a gap between the valve body elastic member 360 and the transition section 343.

[0181] With such an arrangement, when the valve body elastic member 360 is extended or retracted, the valve body elastic member 360 will not interfere with the transition section 343, thereby reducing the friction between the valve body elastic member 360 and the support ring platform 341, and the valve body elastic member 360 and the connecting section 342 have an interference fit, which can ensure the connection stability between the valve body elastic member 360 and the support ring platform 341.

[0182] In some specific embodiments of the present invention, the diameter of the support column 340 is R, and R satisfies: 1mm<R<7mm. In this way, on the one hand, the diameter of the support column 340 can be prevented from being too small, so as to ensure that the structural strength of the support column 340 can be high, so as to use the support column 340 to more stably fix the support valve body elastic member 360, and to prevent the overflow valve plate 330 from tilting. On the other hand, the diameter of the support column 340 can be prevented from being too large, and then the support column 340 can be prevented from excessively occupying the space for the flow of the fluid in the shock absorber 1, so as to ensure that the fluid can flow more smoothly.

[0183] In some specific embodiments of the present invention, Fig.11 and Fig.13 As shown, the overflow valve body 310 is provided with a support column 340, and one end of the support column 340 facing the overflow valve seat 320 is constructed as a guide section 345, and the cross-sectional area of ​​the guide section 345 decreases along the axial direction of the support column 340 as it approaches the overflow valve seat 320; or, the overflow valve seat 320 is provided with a support column 340, and one end of the support column 340 facing the overflow valve body 310 is constructed as a guide section 345, and the cross-sectional area of ​​the guide section 345 decreases along the axial direction of the support column 340 as it approaches the overflow valve body 310.

[0184] Specifically, the overflow valve body 310 is provided with a support column 340, which is close to the overflow valve seat 320 along the axial direction of the support column 340, and the gap between the overflow valve plate 330 and the guide section 345 is increased; or, the overflow valve seat 320 is provided with a support column 340, which is close to the overflow valve body 310 along the axial direction of the support column 340, and the gap between the overflow valve plate 330 and the guide section 345 is increased.

[0185] In this way, the guide section 345 can be set with an inclination or an outer diameter difference. When the overflow valve plate 330 moves a certain distance along the guide section 345 toward the free end of the support column 340, the gap between the overflow valve plate 330 and the support column 340 will gradually increase. This can reduce the friction between the overflow valve plate 330 and the support column 340, making the overflow valve plate 330 move more easily, and can reduce the movement scrape between the overflow valve plate 330 and the support column 340, which is beneficial to improving the damping fluctuation of the overflow valve plate 330 movement.

[0186] In some specific embodiments of the present invention, Figure 7 As shown, the overflow valve seat 320 includes a first seat body 323 and a second seat body 324 .

[0187] The overflow valve plate 330 is disposed between the first seat body 323 and the overflow valve body 310 . The second seat body 324 is supported on a side of the first seat body 323 facing away from the overflow valve plate 330 . The second seat body 324 is suitable for connecting with the piston 200 of the shock absorber 1 .

[0188] The support column 340 is constructed on one of the first base body 323 and the second base body 324 , that is, the support column 340 can be constructed on the first base body 323 , or the support column 340 can be constructed on the second base body 324 .

[0189] Furthermore, a third flow channel 322 is formed between the first seat body 323 and the overflow valve plate 330 , and the second seat body 324 and the first seat body 323 jointly define a first flow channel 321 .

[0190] By dividing the overflow valve seat 320 into the first seat body 323 and the second seat body 324, it is easy to process the overflow valve seat 320, and it is helpful to simplify the assembly of the overflow valve seat 320 and the piston 200, and the assembly is more convenient. Of course, in some embodiments, the first seat body 323 and the second seat body 324 can also be an integral part.

[0191] Among them, Figure 7 As shown, the piston 200 may be provided with a first limiting step 252, and the outer peripheral surface of the first seat body 323 may be provided with a second limiting step 327, and the first limiting step 252 may be stopped at the side of the second limiting step 327 facing away from the second seat body 324, so as to further limit and fix the overflow valve seat 320 with the piston 200 in the axial direction of the piston 200. Alternatively, the first seat body 323 may also be provided with an external thread to connect with the piston 200.

[0192] In some specific embodiments of the present invention, Fig. 9 , Fig.11 and Fig.13 As shown, the first seat body 323 is configured with a through hole 3231, the second seat body 324 is configured with a plurality of flow channel holes 3241, and the second seat body 324 is configured with a support column 340, the support column 340 is penetrated by the through hole 3231, and the plurality of flow channel holes 3241 are arranged at intervals along the circumference of the support column 340.

[0193] The through hole 3231 and the plurality of flow channel holes 3241 form the first flow channel 321 .

[0194] In this way, it is convenient to construct the support column 340 and the flow channel hole 3241 on the second seat body 324 at the same time. The support column 340 can extend into the through hole 3231, so that the overflow valve plate 330 and the magnetic suction component 350 can be sleeved on the support column 340, and the support column 340 will not block the through hole 3231, so that the through hole 3231 can be connected with the compression chamber 111 through the flow channel hole 3241.

[0195] In some specific embodiments of the present invention, Fig.34 and Fig.35 As shown, the overflow valve plate 330 according to the embodiment of the present invention includes a main body portion 332 and a guide portion 333 .

[0196] The guide portion 333 is connected to the main body portion 332 and protrudes from at least one side of the main body portion 332 in the thickness direction. The guide portion 333 and the main body portion 332 jointly define a guide hole 334, and the overflow valve plate 330 is suitable for being movably mounted on the support column 340 in the shock absorber 1 through the guide hole 334, so that the overflow valve plate 330 moves along the axial direction of the shock absorber 1 under the guidance of the support column 340.

[0197] Among them, the guide portion 333 is connected to the main body portion 332 and protrudes from at least one side of the main body portion 332 in the thickness direction, which means that the guide portion 333 can be only arranged on one side of the thickness direction of the main body portion 332, or the guide portion 333 can be arranged on both opposite sides of the thickness direction of the main body portion 332.

[0198] Specifically, the guide portion 333 can be arranged on the side of the main body 332 in the axial direction of the cylinder 100 facing the overflow valve body 310; or, the guide portion 333 can be arranged on the side of the main body 332 in the axial direction of the cylinder 100 facing the overflow valve seat 320; or, the guide portion 333 can be arranged on both sides of the main body 332 in the axial direction of the cylinder 100.

[0199] In addition, when the main body 332 is provided with guide portions 333 on both sides of the opposite sides in the thickness direction, the axial lengths of the guide portions 333 on both sides of the main body 332 may be the same; or, the axial length of the guide portion 333 on the side of the main body 332 facing the overflow valve body 310 may be greater than the length of the guide portion 333 on the side of the main body 332 facing the overflow valve seat 320; or again, the axial length of the guide portion 333 on the side of the main body 332 facing the overflow valve seat 320 may be greater than the length of the guide portion 333 on the side of the main body 332 facing the overflow valve body 310.

[0200] By providing a guide portion 333, and the guide portion 333 and the main body portion 332 jointly defining a guide hole 334, the matching area between the overflow valve plate 330 and the support column 340 can be increased, so that the overflow valve plate 330 can move more smoothly along the support column 340, and the overflow valve plate 330 is not easy to tilt relative to the support column 340. The overflow valve plate 330 can still remain stable after tens of millions of times of opening and closing the valve up and down, thereby further improving the stability of the damping force adjustment of the shock absorber 1.

[0201] In this way, the overflow valve plate 330 according to the embodiment of the present invention can use the guide part 333 to guide the movement of the overflow valve plate 330, thereby reducing the tilt or shaking of the overflow valve plate 330 during movement, and the movement of the overflow valve plate 330 is more stable, which is beneficial to improving the stability of the damping force adjustment of the shock absorber 1.

[0202] In some specific embodiments of the present invention, Fig.35 As shown, along the axial direction of the overflow valve plate 330, the length of the guide portion 333 is L, and the thickness of the main body portion 332 is W; wherein L and W satisfy L>2D.

[0203] For example, L can be greater than 2D, 2.5D, 3D, 3.5D or 4D. This arrangement can prevent the axial extension length of the guide portion 333 along the overflow valve plate 330 from being too short. The contact area between the guide portion 333 and the support column 340 can be larger and the cooperation is more stable, so that the overflow valve plate 330 can move smoothly along the support column 340, further improving the stability of the damping force adjustment of the shock absorber 1.

[0204] Preferably, the length of the guide portion 333 can be 3 times the thickness of the main body 332. In this way, the length of the guide portion 333 will not be too long, the space occupied by the overflow valve plate 330 will not be too large, and assembly is convenient. The processing accuracy of the guide portion 333 will not be too high, thereby avoiding excessively high processing costs of the overflow valve plate 330.

[0205] In some specific embodiments of the present invention, Fig.34 and Fig.35 As shown, the guide portion 333 is arranged on one side of the main body portion 332 in the thickness direction, which can simplify the arrangement structure of the guide portion 333 and further simplify the structure of the overflow valve plate 330, making it easier to process and manufacture.

[0206] Furthermore, if Fig.34 and Fig.35 As shown, the guide portion 333 is provided with a first rounded surface 3331 , which extends along the circumference of the guide hole 334 , and a side of the guide portion 333 away from the main body 332 and an inner wall of the guide hole 334 are transitioned into an arc through the first rounded surface 3331 .

[0207] For example, the guide portion 333 is arranged on the side of the main body 332 facing the overflow valve body 310, so that when the overflow valve plate 330 moves along the support column 340 toward the overflow valve body 310, the end of the guide portion 333 is not easy to scratch the support column 340, and the friction force can be smaller, and the overflow valve plate 330 and the support column 340 are less likely to wear.

[0208] Alternatively, the guide portion 333 is arranged on the side of the main body 332 facing the overflow valve seat 320, so that when the overflow valve plate 330 moves along the support column 340 toward the overflow valve seat 320, the end of the guide portion 333 is not easy to scratch the support column 340, and the friction force can be smaller, and the overflow valve plate 330 and the support column 340 are less likely to wear.

[0209] In some specific embodiments of the present invention, Fig.35As shown, the main body 332 is provided with a second rounded surface 3321 , which extends along the circumference of the guide hole 334 , and a side of the main body 332 away from the guide portion 333 and the inner wall of the guide hole 334 are transitioned into an arc through the second rounded surface 3321 .

[0210] For example, when the guide portion 333 is arranged on the side of the main body 332 facing the overflow valve body 310, when the overflow valve plate 330 moves along the support column 340 toward the overflow valve seat 320, the end of the main body 332 is not easy to scratch the support column 340, and the friction force can be smaller, and the overflow valve plate 330 and the support column 340 are less likely to wear.

[0211] Alternatively, when the guide portion 333 is arranged on the side of the main body 332 facing the overflow valve seat 320, when the overflow valve plate 330 moves along the support column 340 toward the overflow valve body 310, the end of the main body 332 is not easy to scratch the support column 340, and the friction force can be smaller, and the overflow valve plate 330 and the support column 340 are less likely to wear.

[0212] In some specific embodiments of the present invention, there are multiple guide portions 333, and the multiple guide portions 333 include a first guide portion (not shown in the figure) and a second guide portion (not shown in the figure).

[0213] The first guide portion is disposed on one side of the main body 332 in the thickness direction, and the second guide portion is disposed on the other side of the main body 332 in the thickness direction. In other words, guide portions 333 are disposed on both sides of the main body 332 in the thickness direction, which can further improve the stability of the cooperation between the overflow valve plate 330 and the support column 340, and the overflow valve plate 330 is less likely to shake and tilt, and moves more smoothly.

[0214] Furthermore, the first guide portion is provided with a third rounded surface (not shown in the figure), the third rounded surface extends along the circumference of the guide hole 334, and the side of the first guide portion away from the main body portion 332 and the inner wall of the guide hole 334 are transitioned through the arc of the third rounded surface; and / or, the second guide portion is provided with a fourth rounded surface (not shown in the figure), the fourth rounded surface extends along the circumference of the guide hole 334, and the side of the second guide portion away from the main body portion 332 and the inner wall of the guide hole 334 are transitioned through the arc of the fourth rounded surface.

[0215] For example, the first guide portion may be disposed on a side of the main body 332 facing the relief valve body 310 , and the second guide portion may be disposed on a side of the main body 332 facing the relief valve seat 320 .

[0216] In this way, when the overflow valve plate 330 moves along the support column 340 toward the overflow valve body 310, the end of the first guide portion is not easy to scratch the support column 340, and when the overflow valve plate 330 moves along the support column 340 toward the overflow valve seat 320, the end of the second guide portion is also not easy to scratch the support column 340. The overflow valve plate 330 and the support column 340 are less likely to wear, and the friction between the overflow valve plate 330 and the support column 340 can be smaller, which is more convenient for the movement of the overflow valve plate 330.

[0217] In some specific embodiments of the present invention, the support column 340 and the guide hole 334 are clearance-matched, and the distance between the outer circumference of the support column 340 and the inner wall of the guide hole 334 is D, and D satisfies 0.02mm≤D≤0.15mm.

[0218] For example, the distance D between the outer circumference of the support column 340 and the inner wall of the guide hole 334 can be 0.02mm, 0.03mm, 0.04mm, 0.05mm, 0.06mm, 0.07mm, 0.08mm, 0.09mm, 0.1mm, 0.11mm, 0.12mm, 0.13mm, 0.14mm or 0.15mm.

[0219] Preferably, the single-side gap between the outer circumference of the support column 340 and the inner wall of the guide hole 334 can be 0.05mm-0.10mm, so that the overflow valve plate 330 can move smoothly in the up and down axial direction, not easily tilted, and not easily worn and failed between the shaft holes.

[0220] In some specific embodiments of the present invention, Figure 1 , Figure 24-28 As shown, the flow control valve 300 includes a relief valve seat 320 , a relief valve body 310 , a relief valve plate 330 and a magnetic attraction member 350 .

[0221] The overflow valve body 310 is movably disposed on one side of the overflow valve seat 320 , the overflow valve plate 330 is movably disposed between the overflow valve body 310 and the overflow valve seat 320 , and the magnetic component 350 is disposed on the side of the overflow valve seat 320 facing the overflow valve plate 330 , and the magnetic component 350 generates a magnetic force to attract the overflow valve plate 330 .

[0222] By setting the magnetic member 350, the magnetic member 350 is arranged on the side of the overflow valve seat 320 facing the overflow valve disc 330, and the magnetic member 350 generates a magnetic attraction force to attract the overflow valve disc 330. Among them, the overflow valve disc 330 can be made of iron-containing material. By setting the magnetic member 350, the magnetic member 350 attracts the overflow valve disc 330 to approach the overflow valve seat 320. When the flow control valve 300 needs to be closed, the overflow valve disc 330 can quickly approach the overflow valve seat 320 with the assistance of the magnetic member 350, and the magnetic attraction force of the magnetic member 350 can make the overflow valve disc 330 and the overflow valve seat 320 fit more closely, so that the overflow valve disc 330 can fit the overflow valve seat 320 and seal, so as to quickly build pressure.

[0223] Furthermore, the magnetic attraction member 350 can also absorb and filter the metal impurities in the shock absorber 1, so as to make the operation of the shock absorber 1 more stable and reliable.

[0224] In this way, the flow regulating valve 300 according to the embodiment of the present invention can use the magnetic suction component 350 to attract the overflow valve plate 330 to the overflow valve seat 320, so that the overflow valve plate 330 and the overflow valve seat 320 can quickly fit and seal, and the sealing stability is better, so as to quickly build up pressure.

[0225] In some specific embodiments of the present invention, Figure 24-28 As shown, the flow control valve 300 further includes a magnetic adjustment member 352 , which is disposed on one side of the magnetic attraction member 350 , and is used to adjust the magnetic attraction force of the magnetic attraction member 350 on the overflow valve plate 330 .

[0226] Therefore, the magnetic attraction force of the magnetic member 350 on the overflow valve plate 330 can be increased or decreased by adjusting the magnetic force adjustment member 352 to meet the use requirements of different shock absorbers 1. For example, adding more magnetic force adjustment members 352 can increase the magnetic attraction force of the magnetic member 350 on the overflow valve plate 330, or adding more magnetic force adjustment members 352 can reduce the magnetic attraction force of the magnetic member 350 on the overflow valve plate 330.

[0227] This arrangement can prevent the magnetic attraction force of the magnetic component 350 on the overflow valve plate 330 from being too large, and prevent the magnetic component 350 from over-adsorbing the overflow valve plate 330. At the same time, it can prevent the magnetic attraction force of the magnetic component 350 from being too small, so that the magnetic component 350 and the magnetic adjustment component can more effectively absorb and filter metal impurities in the shock absorber 1.

[0228] In some specific embodiments of the present invention, Fig. 27 As shown, the magnetic adjustment member 352 is disposed on the side of the magnetic member 350 facing the overflow valve plate 330 , and the magnetic adjustment member 352 is used to block the magnetic attraction of the magnetic member 350 on the overflow valve plate 330 to adjust the magnetic attraction of the magnetic member 350 on the overflow valve plate 330 .

[0229] The magnetic force adjusting component 352 is used to block the magnetic attraction force of the magnetic attraction component 350 on the overflow valve plate 330 , which means that the magnetic force adjusting component 352 can weaken the magnetic attraction force of the magnetic attraction component 350 on the overflow valve plate 330 .

[0230] In this way, by changing the size of the magnetic force adjusting member 352 between the magnetic member 350 and the overflow valve plate 330, the magnetic attraction of the magnetic member 350 to the overflow valve plate 330 can be adjusted. It should be noted that the larger the size of the magnetic force adjusting member 352 between the magnetic member 350 and the overflow valve plate 330, the more obvious the blocking effect of the magnetic force adjusting member 352 on the magnetic attraction.

[0231] Therefore, when the size of the magnetic adjusting component 352 between the magnetic component 350 and the overflow valve plate 330 is larger, the magnetic adjusting component 352 has a better blocking effect on the magnetic attraction force of the overflow valve plate 330, and the magnetic attraction force of the magnetic component 350 on the overflow valve plate 330 can be reduced at this time; and when the size of the magnetic adjusting component 352 between the magnetic component 350 and the overflow valve plate 330 is smaller, the magnetic adjusting component 352 has a weaker blocking effect on the magnetic attraction force of the overflow valve plate 330, and the magnetic attraction force of the magnetic component 350 on the overflow valve plate 330 can be larger.

[0232] In some specific embodiments of the present invention, Fig.28 As shown, the magnetic adjustment member 352 is disposed between the magnetic member 350 and the overflow valve seat 320 , and the magnetic adjustment member 352 is used to adjust the minimum distance between the magnetic member 350 and the overflow valve plate 330 to adjust the magnetic attraction force of the magnetic member 350 on the overflow valve plate 330 .

[0233] It should be noted that, when the size of the magnetic adjustment member 352 between the magnetic member 350 and the overflow valve seat 320 is larger, the distance between the magnetic member 350 and the overflow valve plate 330 can be smaller, and the magnetic attraction force of the magnetic member 350 on the overflow valve plate 330 can be greater.

[0234] Therefore, when the size of the magnetic adjusting component 352 between the magnetic component 350 and the overflow valve seat 320 is larger, the magnetic adjusting component 352 can support the magnetic component 350 so that the distance between the magnetic component 350 and the overflow valve plate 330 can be smaller, thereby increasing the magnetic attraction of the magnetic component 350 to the overflow valve plate 330; and when the size of the magnetic adjusting component 352 between the magnetic component 350 and the overflow valve seat 320 is smaller, the distance between the magnetic component 350 and the overflow valve plate 330 can be larger, thereby weakening the magnetic attraction of the magnetic component 350 to the overflow valve plate 330.

[0235] In some specific embodiments of the present invention, Fig. 9 and Fig.10As shown, the magnetic adjustment member 352 includes at least one magnetic adjustment sheet 351, and at least one magnetic adjustment sheet 351 is stacked. The magnetic adjustment sheets 351 adjust the magnetic attraction of the magnetic member 350 to the overflow valve sheet 330 by adjusting their own number.

[0236] In this way, the number of magnetic adjustment pieces 351 can be changed as needed, so that the magnetic attraction force of the magnetic element 350 on the overflow valve piece 330 can be increased or decreased to meet the use requirements of different shock absorbers 1. For example, when the magnetic adjustment piece 352 is arranged on the side of the magnetic element 350 facing the overflow valve piece 330, by increasing the number of magnetic adjustment pieces 351, the magnetic attraction force of the magnetic element 350 on the overflow valve piece 330 can be reduced, and by reducing the number of magnetic adjustment pieces 351, the magnetic attraction force of the magnetic element 350 on the overflow valve piece 330 can be increased. Alternatively, when the magnetic adjustment piece 352 is arranged on the side of the magnetic element 350 facing the overflow valve seat 320, by increasing the number of magnetic adjustment pieces 351, the magnetic attraction force of the magnetic element 350 on the overflow valve piece 330 can be increased, and by reducing the number of magnetic adjustment pieces 351, the magnetic attraction force of the magnetic element 350 on the overflow valve piece 330 can be reduced.

[0237] Therefore, by adjusting the number of magnetic adjustment plates 351, the magnetic attraction force of the magnetic component 350 on the overflow valve plate 330 can be adjusted more accurately and the adjustment is more convenient. Not only can it avoid the magnetic attraction force of the magnetic component 350 on the overflow valve plate 330 being too large, but the magnetic component 350 and the magnetic adjustment plate 351 can also more effectively adsorb and filter metal impurities in the shock absorber 1.

[0238] Furthermore, there are multiple magnetic adjustment sheets 351 , and an adsorption gap is formed between two adjacent magnetic adjustment sheets 351 or between the magnetic adjustment sheet 351 and the magnetic attraction member 350 .

[0239] It is understandable that the magnetic adjustment sheet 351 will be magnetized by the magnetic attraction member 350, so that the magnetic adjustment sheet 351 can adsorb the metal dust impurities inside the shock absorber 1 into the adsorption gap, thereby preventing the metal dust impurities from continuing to flow in the shock absorber, making the operation of the shock absorber 1 more stable and reliable.

[0240] In some specific embodiments of the present invention, the magnetic adjustment member 352 includes a magnetic adjustment block (not shown in the figure), which adjusts the magnetic attraction of the magnetic member 350 on the overflow valve plate 330 by adjusting its own axial height along the overflow valve seat 320.

[0241] In this way, the height of the magnetic force adjustment block can be changed as needed, so that the magnetic attraction force of the magnetic member 350 on the overflow valve plate 330 can be increased or decreased to meet the use requirements of different shock absorbers 1. For example, when the magnetic force adjustment block is arranged on the side of the magnetic member 350 facing the overflow valve plate 330, by increasing the height of the magnetic force adjustment block, the magnetic attraction force of the magnetic member 350 on the overflow valve plate 330 can be reduced, and by reducing the height of the magnetic force adjustment block, the magnetic attraction force of the magnetic member 350 on the overflow valve plate 330 can be increased. Alternatively, when the magnetic force adjustment block is arranged on the side of the magnetic member 350 facing the overflow valve seat 320, by increasing the height of the magnetic force adjustment block, the magnetic attraction force of the magnetic member 350 on the overflow valve plate 330 can be increased, and by reducing the height of the magnetic force adjustment block, the magnetic attraction force of the magnetic member 350 on the overflow valve plate 330 can be reduced.

[0242] In this way, by adjusting the height of the magnetic force adjustment block, not only can the magnetic attraction of the magnetic element 350 to the overflow valve plate 330 be prevented from being too strong, but the magnetic element 350 and the magnetic force adjustment block can also more effectively absorb and filter the metal impurities in the shock absorber 1.

[0243] Furthermore, the magnetic adjustment block is provided with adsorption holes (not shown in the figure).

[0244] It is understandable that the magnetic adjustment block will be magnetized by the magnetic attraction member 350, so that the magnetic adjustment block can adsorb the metal dust impurities inside the shock absorber 1 into the adsorption hole, thereby preventing the metal dust impurities from continuing to flow in the shock absorber, making the operation of the shock absorber 1 more stable and reliable.

[0245] In some specific embodiments of the present invention, Fig.24 As shown, the overflow valve seat 320 is configured with at least one flow channel hole 3241, and the magnetic attraction member 350 is disposed adjacent to the flow channel hole 3241. In this way, when the fluid flows through the flow channel hole 3241, it can be closer to the magnetic attraction member 350, so that the magnetic attraction member 350 can be used to absorb and filter magnetic impurities in the fluid, which is conducive to improving the filtering effect of the magnetic impurities.

[0246] In some specific embodiments of the present invention, Fig.24 As shown, the flow channel hole 3241 is constructed as an arc-shaped flow channel hole extending around the magnetic suction member 350. The arc-shaped flow channel hole refers to a flow channel hole 3241 whose cross-sectional shape is an arc shape. This arrangement allows the flow channel hole 3241 to be adapted to the shape of the magnetic suction member 350, and the fluid flowing through the flow channel hole 3241 can flow around the magnetic suction member 350, that is, the contact area between the fluid and the magnetic suction member 350 can be increased, further improving the filtering and adsorption effect of the magnetic suction member 350 on magnetic impurities in the fluid.

[0247] In some specific embodiments of the present invention, Figure 1 , Figure 24-28As shown, the overflow valve seat 320 is provided with a support column 340 , which extends axially along the overflow valve seat 320 , the magnetic attraction member 350 and the overflow valve plate 330 are sleeved on the support column 340 , and the overflow valve plate 330 is movable along the axial direction of the support column 340 .

[0248] In this way, the support column 340 can guide the movement of the overflow valve plate 330, and the overflow valve plate 330 is not prone to radial shaking. The overflow valve plate 330 can still remain stable after tens of millions of times of opening and closing the valve up and down, further improving the stability of the damping force adjustment of the shock absorber 1.

[0249] Furthermore, by sleeve-fitting and fixing the magnetic member 350 on the support column 340 , positional displacement of the magnetic member 350 can be avoided, thereby improving the fixing reliability of the magnetic member 350 .

[0250] In some specific embodiments of the present invention, Figure 24-28 As shown, the flow control valve 300 further includes a limiting member 380 .

[0251] The limiting member 380 is disposed on the supporting column 340 and is located on a side of the magnetic member 350 adjacent to the overflow valve plate 330 to limit the magnetic member 350 and the overflow valve plate 330 .

[0252] Among them, the limiting member 380 can be a clamp. By limiting the magnetic member 350 through the limiting member 380, the magnetic member 350 can be prevented from moving along the axial direction of the support column 340, and the fixing stability of the magnetic member 350 is further improved.

[0253] In addition, when the magnetic force adjusting member 352 is provided, the limiting member 380 can also be used to simultaneously limit the axial position of the magnetic force adjusting member 352 .

[0254] In some specific embodiments of the present invention, Fig.25 As shown, the support column 340 is formed with a slot 344 , and the limiting member 380 is locked in the slot 344 , which can simplify the connection between the limiting member 380 and the support column 340 and make the connection between the limiting member 380 and the support column 340 reliable.

[0255] In some specific embodiments of the present invention, Figure 7 and Fig.11 As shown, the valve body 230 is provided with a sealing ring platform 244, and the end of the overflow valve body 310 facing away from the overflow valve seat 320 is provided with a sealing groove 316. The sealing ring platform 244 extends into the sealing groove 316 and cooperates with the sealing groove 316 in a dynamic seal. The side of the overflow valve seat 320 facing the overflow valve plate 330 is provided with a valve seat abutting ring platform 325, and the valve seat abutting ring platform 325 abuts against the overflow valve plate 330, and the inner diameter of the valve seat abutting ring platform 325 is larger than the inner diameter of the sealing groove 316.

[0256] The valve seat abutment ring 325 in the present invention is the second abutment ring in the priority application.

[0257] Specifically, Figure 8 As shown, the inner diameter of the valve seat abutting the ring platform 325 can be A, that is, the pressure bearing area S1 formed by the relief valve seat 320 abutting against the inner diameter of the relief valve plate 330 is: π(A / 2) 2 The inner diameter of the sealing groove 316 is B, that is, the inner diameter of the dynamic sealing surface of the relief valve body 310 and the valve body 230 forms a pressure bearing area S2 of: π(B / 2) 2 .

[0258] It should be noted that when the flow regulating valve 300 is in the closed state and the shock absorber 1 is in the compression condition, if you want to open the third flow channel 322, it is necessary to meet the following conditions: the pressure on the side of the overflow valve plate 330 facing the overflow valve seat 320 (i.e., pressure × the force area S1 on the side of the overflow valve plate 330 facing the overflow valve seat 320) > the electromagnetic force exerted on the overflow valve body 310 + the pressure on the side of the overflow valve body 310 facing away from the overflow valve seat 320 (i.e., pressure × the force area S2 on the side of the overflow valve body 310 facing away from the overflow valve seat 320). At this time, the fluid can more easily push open the overflow valve plate 330 and the overflow valve body 310, so that the fluid can flow out from between the overflow valve seat 320 and the overflow valve plate 330, and the damping is reduced.

[0259] From the above, it can be seen that when the ratio of the force area S2 on the side of the overflow valve body 310 facing away from the overflow valve seat 320 to the force area S1 on the side of the overflow valve plate 330 facing the overflow valve seat 320 is reduced, the compression damping force adjustment bandwidth can be greatly improved. The compression damping force plays a key role in the driving comfort and controllability of the vehicle. In order to improve people's demand for driving experience in different scenarios, the compression damping adjustment bandwidth needs to be increased as much as possible.

[0260] In this way, the shock absorber 1 according to the embodiment of the present invention can more easily push open the relief valve plate 330 and the relief valve body 310 in the compression condition, so as to adjust the damping force of the shock absorber 1.

[0261] In some specific embodiments of the present invention, the inner cross-sectional area of ​​the valve seat abutting ring platform 325 is S1, the inner cross-sectional area of ​​the sealing groove 316 is S2, and S1 and S2 satisfy: 1.05×S2≤S1≤1.3×S2.

[0262] The inner cross-sectional area of ​​the valve seat abutting ring platform 325 refers to the cross-sectional area of ​​the inner peripheral surface of the valve seat abutting ring platform 325 , and the inner cross-sectional area of ​​the sealing groove 316 refers to the cross-sectional area of ​​the inner peripheral surface of the sealing groove 316 .

[0263] That is, when the following relationship exists: Area ratio relationship π×(A / 2) 2=(1.05~1.3)×π×B / 2) 2 That is, 1.05 times the force area S2 ≤ force area S1 ≤ 1.3 times the force area S2. The overflow valve plate 330 is easy to push open and release pressure when the fluid flows. At the same time, the compression damping adjustment bandwidth is large, the compression damping force is easy to adjust, and the upper limit of the vehicle's driving comfort and controllability is high.

[0264] In some specific embodiments of the present invention, Fig.11 As shown, a valve body abutting ring 312 is provided on the side of the overflow valve body 310 facing the overflow valve plate 330 , the valve body abutting ring 312 abuts against the overflow valve plate 330 , and the inner diameter of the valve body abutting ring 312 is smaller than the inner diameter of the valve seat abutting ring 325 .

[0265] The valve body abutment ring 312 in the present invention is the first abutment ring in the priority application.

[0266] In this way, the contact area between the fluid in the overflow valve body 310 and the overflow valve plate 330 can be smaller than the contact area between the fluid in the overflow valve seat 320 and the overflow valve plate 330. When the flow regulating valve 300 is in a closed state and the shock absorber 1 is in a compression condition, the fluid flows from the compression chamber 111 to the recovery chamber 112, and the fluid in the first flow channel 321 can more easily push the overflow valve plate 330 and the overflow valve body 310, so that the third flow channel 322 formed between the overflow valve plate 330 and the overflow valve seat 320 can be opened, thereby allowing the fluid in the compression chamber 111 to flow from the first flow channel 321 and the third flow channel 322 into the recovery chamber 112.

[0267] In some specific embodiments of the present invention, Fig.11 As shown, the outer diameter of the valve body abutting ring 312 is smaller than the inner diameter of the valve seat abutting ring 325 .

[0268] In this way, the valve body abutting ring platform 312 and the valve seat abutting ring platform 325 can be arranged alternately along the radial direction of the overflow valve plate 330, and the side of the overflow valve plate 330 facing the overflow valve body 310 can exceed the valve body abutting ring platform 312 in its radial direction outward, that is, the outer peripheral edge of the overflow valve plate 330 can exceed the valve body abutting ring platform 312 in its radial direction outward. When the flow control valve 300 is in the valve closing state and the shock absorber 1 is in the recovery working condition, the fluid can flow between the overflow valve plate 330 and the outer peripheral edge of the overflow valve body 310, so that the overflow valve plate 330 and the overflow valve body 310 can be pushed apart by the fluid, so that the second flow channel 311 can be opened, so that the fluid in the recovery chamber 112 can flow into the compression chamber 111 through the second flow channel 311, the connecting hole 331 and the first flow channel 321.

[0269] In some specific embodiments of the present invention, Figure 14-Figure 20As shown, the overflow valve plate 330 is configured with an overflow channel 370 , and when the flow regulating valve 300 is closed, the overflow channel 370 is communicated with the first flow channel 321 and the recovery chamber 112 of the shock absorber 1 .

[0270] In this way, when the flow regulating valve 300 is in the valve closing state and the shock absorber 1 is in the compression condition, the fluid in the compression chamber 111 can first flow to the recovery chamber 112 through the overflow channel 370 in a stage. At this time, the flow rate of the fluid flowing from the compression chamber 111 to the recovery chamber 112 is small, the damping of the shock absorber 1 is large, and the shock absorber 1 appears to be "hard"; or, when the flow regulating valve 300 is in the valve closing state and the shock absorber 1 is in the recovery condition, the fluid in the compression chamber 111 can first flow to the compression chamber 111 through the overflow channel 370 in a stage. At this time, the flow rate of the fluid flowing from the recovery chamber 112 to the compression chamber 111 is small, the damping of the shock absorber 1 is large, and the shock absorber 1 appears to be "hard".

[0271] Moreover, by providing an overflow channel 370 on the overflow valve plate 330, for example, the overflow channel 370 can be constructed by laser drilling and grooving on the overflow valve plate 330, the processing accuracy of the overflow channel 370 can be higher, the consistency of batch production of the overflow valve plate 330 can be better, and the requirements of the shock absorber 1 can be better met. Moreover, this will not damage the flatness of the overflow valve seat 320 and the overflow valve body 310. The overflow valve seat 320 and the overflow valve body 310 can be more tightly fitted and sealed with the overflow valve plate 330. When the shock absorber 1 is in a stage of a compression condition or a stage of a recovery condition, the flow resistance fluctuation of the fluid in the overflow channel 370 is smaller, and the fluid flow is smoother, thereby ensuring that the damping force of the shock absorber 1 is stable and the vibration reduction effect is better.

[0272] In some specific embodiments of the present invention, Fig.11 As shown, a valve body abutting ring 312 is provided on the side of the overflow valve body 310 facing the overflow valve disc 330 , and a valve seat abutting ring 325 is provided on the side of the overflow valve seat 320 facing the overflow valve disc 330 .

[0273] The valve body abutting ring 312 in the present invention is the first abutting ring in the priority application, and the valve seat abutting ring 325 is the second abutting ring in the priority application.

[0274] Specifically, the valve body abutting ring 312 and the valve seat abutting ring 325 are staggered in the radial direction of the flow control valve 300 , and along the radial direction of the overflow valve plate 330 , at least part of the overflow channel 370 is located between the valve body abutting ring 312 and the valve seat abutting ring 325 .

[0275] Among them, the valve body abutting ring platform 312 and the valve seat abutting ring platform 325 are staggered in the radial direction of the flow control valve 300, which means that along the radial direction of the cylinder 100, the outer diameter of the valve body abutting ring platform 312 can be smaller than the inner diameter of the valve seat abutting ring platform 325, or the inner diameter of the valve body abutting ring platform 312 can be larger than the outer diameter of the valve seat abutting ring platform 325.

[0276] In this way, the overflow channel 370 can extend in the radial direction of the cylinder 100 to between the valve body abutting ring platform 312 and the valve seat abutting ring platform 325, and the valve body abutting ring platform 312 and the valve seat abutting ring platform 325 will not completely block the overflow channel 370, so that the overflow channel 370 can be connected with the compression chamber 111 and the recovery chamber 112 respectively, so that the fluid in the compression chamber 111 and the fluid in the recovery chamber 112 can flow through the overflow channel 370, and the structural setting is more reasonable.

[0277] In some specific embodiments of the present invention, Figure 7 and Fig.11 As shown, the outer diameter of the valve body abutting ring 312 is smaller than the inner diameter of the valve seat abutting ring 325 .

[0278] In this way, the contact area between the fluid in the overflow valve body 310 and the overflow valve plate 330 can be smaller than the contact area between the fluid in the overflow valve seat 320 and the overflow valve plate 330. When the flow regulating valve 300 is in a closed state and the shock absorber 1 is in a compression condition, the fluid flows from the compression chamber 111 to the recovery chamber 112, and the fluid in the first flow channel 321 can more easily push the overflow valve plate 330 and the overflow valve body 310, so that the third flow channel 322 formed between the overflow valve plate 330 and the overflow valve seat 320 can be opened, thereby allowing the fluid in the compression chamber 111 to flow from the first flow channel 321 and the third flow channel 322 into the recovery chamber 112.

[0279] In addition, at least part of the overflow channel 370 is located between the outer circumference of the valve body abutting ring 312 and the inner circumference of the valve seat abutting ring 325. In this way, the valve body abutting ring 312 and the valve seat abutting ring 325 will not completely block the overflow channel 370, so that the overflow channel 370 can be communicated with the compression chamber 111 and the recovery chamber 112 respectively, so that the fluid in the compression chamber 111 and the fluid in the recovery chamber 112 can flow through the overflow channel 370.

[0280] In some specific embodiments of the present invention, Figure 8 As shown, a side surface of the overflow valve plate 330 facing the overflow valve body 310 is constructed with a valve body abutment surface 335, and the valve body abutment surface 335 is arranged adjacent to the inner periphery of the overflow valve plate 330. The valve body abutment surface 335 is suitable for abutting against the valve body abutment ring platform 312, and a valve body pressure-bearing surface 336 is formed between the valve body abutment surface 335 and the outer periphery of the overflow valve plate 330.

[0281] In the orthographic projection along the axial direction of the cylinder 100 , the inner peripheral edge of the valve body abutting surface 335 is located on the inner side of the valve seat abutting ring 325 .

[0282] Therefore, when the flow regulating valve 300 is in the closed state and the shock absorber 1 is in the recovery condition, the fluid can flow between the valve body pressure-bearing surface 336 and the part of the valve body of the overflow valve body 310 that abuts the outside of the ring platform 312, so as to push the overflow valve plate 330 and the overflow valve body 310 open to open the second flow channel 311.

[0283] In addition, if Figure 8 As shown, the side surface of the overflow valve disc 330 facing the overflow valve seat 320 is configured with a valve seat abutting surface 337 and a valve seat pressure-bearing surface 338, the valve seat abutting surface 337 is arranged adjacent to the outer periphery of the overflow valve disc 330, the valve seat pressure-bearing surface 338 is arranged adjacent to the inner periphery of the overflow valve disc 330, and the valve seat abutting surface 337 is suitable for abutting against the valve seat abutting ring 325. In this way, when the flow control valve 300 is in the valve closing state and the shock absorber 1 is in the compression condition, the fluid can push the overflow valve disc 330 through the valve seat pressure-bearing surface 338, and then can push the overflow valve disc 330 and the overflow valve body 310 relative to the overflow valve seat 320 to open the third flow channel 322.

[0284] In some specific embodiments of the present invention, Figure 14-16 As shown, the overflow channel 370 is constructed as an overflow hole 339 , which penetrates the overflow valve plate 330 along the thickness direction of the overflow valve plate 330 , and the overflow hole 339 is located between the outer circumferential surface of the valve body abutting the ring platform 312 and the inner circumferential surface of the valve seat abutting the ring platform 325 .

[0285] For example, the overflow hole 339 can be formed on the overflow valve plate 330 by laser drilling, which can ensure that the flatness of the overflow valve plate 330 is good, and the processing accuracy of the overflow hole 339 can be high, and the consistency in mass production is better.

[0286] There may be a plurality of overflow holes 339, and the plurality of overflow holes 339 may be spaced apart along the circumference of the overflow valve plate 330. The axial direction of the overflow hole 339 may be parallel to the thickness direction of the overflow valve plate 330, or the axial direction of the overflow hole 339 may be inclined relative to the thickness direction of the overflow valve plate 330.

[0287] With such arrangement, the overflow valve body 310 and the overflow valve seat 320 will not interfere with the overflow hole 339 , and the overflow hole 339 can always remain connected with the compression chamber 111 and the recovery chamber 112 .

[0288] In addition, by constructing the overflow channel 370 as the overflow hole 339, the size of the overflow hole 339 can be set smaller, so that the flow rate of the overflow hole 339 can be smaller. When the flow regulating valve 300 is in the closed state and the shock absorber 1 is in the compression condition, the fluid in the compression chamber 111 can first flow to the recovery chamber 112 through the overflow hole 339 in a stage. At this time, the flow rate of the fluid flowing from the compression chamber 111 to the recovery chamber 112 is smaller, the damping of the shock absorber 1 is larger, and the shock absorber 1 appears to be "hard"; or, when the flow regulating valve 300 is in the closed state and the shock absorber 1 is in the recovery condition, the fluid in the compression chamber 111 can first flow to the compression chamber 111 through the overflow hole 339 in a stage. At this time, the flow rate of the fluid flowing from the recovery chamber 112 to the compression chamber 111 is smaller, the damping of the shock absorber 1 is larger, and the shock absorber 1 appears to be "hard".

[0289] In some specific embodiments of the present invention, Figure 17-Figure 19 As shown, the overflow channel 370 is constructed as a first overflow notch 371, one end of the first overflow notch 371 extends at least to between the outer circumferential surface of the valve body abutting ring platform 312 and the inner circumferential surface of the valve seat abutting ring platform 325, and the other end of the first overflow notch 371 extends along the radial direction of the overflow valve plate 330 toward the outer peripheral edge of the overflow valve plate 330.

[0290] The first overflow notch 371 in the present invention is the overflow notch in the priority application.

[0291] In this way, the radial extension size of the first overflow gap 371 along the overflow valve plate 330 can be larger, and the first overflow gap 371 is less likely to be blocked by the overflow valve seat 320 and the overflow valve body 310, so that the fluid can flow between the compression chamber 111 and the recovery chamber 112 through the first overflow gap 371.

[0292] Furthermore, if Fig.18 As shown, the other end of the first overflow notch 371 extends to the outer periphery of the overflow valve plate 330, so that the other end of the first overflow notch 371 is open. This arrangement not only simplifies the structure of the first overflow notch 371, which is conducive to simplifying the processing steps of the overflow valve plate 330, but also allows the fluid to directly enter the first overflow notch 371 from the outer periphery of the overflow valve plate 330, or the fluid can enter the first overflow notch from the outer periphery of the overflow valve plate 330 along the first overflow notch 371, so that the fluid can flow more smoothly, and the first overflow notch 371 is less likely to be blocked by the overflow valve seat 320 and the overflow valve body 310, which more effectively ensures that the fluid can flow between the compression chamber 111 and the recovery chamber 112 through the first overflow notch 371.

[0293] In some specific embodiments of the present invention, Figure 17-Figure 19As shown, the first overflow notch 371 penetrates along the thickness direction of the overflow valve plate 330, which can simplify the structure of the first overflow notch 371 and facilitate processing. The channel flow area of ​​the first overflow notch 371 can be larger, and the flow of the fluid at the first overflow notch 371 is smoother.

[0294] Alternatively, the first overflow notch 371 is provided on at least one side in the thickness direction of the overflow valve plate 330. For example, the first overflow notch 371 can be provided on the side of the overflow valve plate 330 in the thickness direction facing the overflow valve body 310, or the first overflow notch 371 can be provided on the side of the overflow valve plate 330 in the thickness direction facing the overflow valve seat 320, or the first overflow notch 371 can be provided on both opposite sides of the overflow valve plate 330 in the thickness direction.

[0295] In some specific embodiments of the present invention, a second overflow notch is provided on the side of the valve body abutting against the ring platform 312 facing the overflow valve plate 330, and the second overflow notch is connected to the first flow channel 321 and the recovery chamber 112; and / or Fig.29 As shown, a third overflow notch 313 is provided on one side of the valve seat abutting ring platform 325 facing the overflow valve plate 330 , and the third overflow notch 313 is communicated with the first flow channel 321 and the recovery chamber 112 .

[0296] The second overflow notch and the third overflow notch 313 in the present invention are the overflow notches in the priority application.

[0297] For example, the second overflow notch can be constructed only on the side of the overflow valve body 310 facing the overflow valve plate 330; or, the third overflow notch 313 can be constructed only on the side of the overflow valve seat 320 facing the overflow valve plate 330; or, the second overflow notch can be constructed on the side of the overflow valve body 310 facing the overflow valve plate 330, and the third overflow notch 313 can be constructed on the side of the overflow valve seat 320 facing the overflow valve plate 330.

[0298] In this way, when the flow regulating valve 300 is in the valve closing state and the shock absorber 1 is in the compression condition, the fluid in the compression chamber 111 can first flow to the recovery chamber 112 through the second overflow gap and / or the third overflow gap 313 in a stage. At this time, the flow rate of the fluid flowing from the compression chamber 111 to the recovery chamber 112 is small, the damping of the shock absorber 1 is large, and the shock absorber 1 appears to be "hard"; or, when the flow regulating valve 300 is in the valve closing state and the shock absorber 1 is in the recovery condition, the fluid in the compression chamber 111 can first flow to the compression chamber 111 through the second overflow gap and / or the third overflow gap 313 in a stage. At this time, the flow rate of the fluid flowing from the recovery chamber 112 to the compression chamber 111 is small, the damping of the shock absorber 1 is large, and the shock absorber 1 appears to be "hard".

[0299] In some specific embodiments of the present invention, Fig.15 , Fig.18 and Fig.29 As shown, the overflow channel 370 is constructed in plurality, and the plurality of overflow channels 370 are arranged at intervals along the circumference of the overflow valve plate 330. In this way, the plurality of overflow channels 370 can simultaneously supply fluid flow, further improving the fluid flow smoothness between the compression chamber 111 and the recovery chamber 112. Moreover, the fluid can flow along multiple circumferential locations of the overflow valve plate 330, and the fluid flow is more uniform, so that the damping force of the shock absorber 1 is more stable.

[0300] The overflow valve seat 320 according to the embodiment of the present invention includes a valve seat abutting ring 325 and a valve seat guide surface 326 .

[0301] The valve seat abutment ring 325 in the present invention is the first abutment ring in the priority application, and the valve seat guide surface 326 in the present invention is the guide surface in the priority application.

[0302] The valve seat abutting ring 325 is arranged on the side of the overflow valve seat 320 facing the overflow valve plate 330 of the shock absorber 1 , and the valve seat guide surface 326 is arranged on the side of the overflow valve seat 320 facing the overflow valve plate 330 , and the valve seat guide surface 326 is located radially outside the valve seat abutting ring 325 .

[0303] In this way, the overflow valve seat 320 can be abutted against the overflow valve plate 330 through the valve seat abutment ring 325, and the valve seat guide surface 326 can be separated from the overflow valve plate 330. By arranging the valve seat guide surface 326 on the outer side of the valve seat abutment ring 325, the valve seat guide surface 326 can be used to reduce the flow resistance of the fluid flowing through the overflow valve seat 320 and the overflow valve plate 330. In this way, when the flow control valve 300 is in the valve opening state, the fluid flowing through the overflow valve seat 320 and the overflow valve plate 330 can be guided by the valve seat guide surface 326, so as to adjust the fluid flow between the overflow valve seat 320 and the overflow valve plate 330, thereby facilitating the adjustment of the damping force of the shock absorber 1.

[0304] Thus, the overflow valve seat 320 according to the embodiment of the present invention can reduce the flow resistance of the fluid flowing through the flow regulating valve 300 , so as to adjust the fluid flow through the flow regulating valve 300 , and further adjust the damping force of the shock absorber 1 .

[0305] In some specific embodiments of the present invention, Figure 8 As shown, along the radial direction of the overflow valve seat 320, the distance between any point of the valve seat guide surface 326 and the radial outer side of the valve seat abutting ring platform 325 is X;

[0306] Along the axial direction of the overflow valve seat 320 , the distance between any point of the valve seat guide surface 326 and one end of the valve seat abutting ring 325 facing the overflow valve plate 330 is Y, and X and Y satisfy: Y / X>0.5.

[0307] The X value of the selected point can be 0.5 mm, 1 mm or 1.5 mm. In addition, it should be noted that the units of X and Y are the same, both in millimeters.

[0308] This arrangement can avoid the gap between the valve seat guide surface 326 and the overflow valve plate 330 being too small, so that the fluid can flow into between the valve seat guide surface 326 and the overflow valve plate 330, that is, it is easy to guide the fluid through the valve seat guide surface 326, thereby reducing the flow resistance of the fluid and making the fluid flow more smooth.

[0309] In some specific embodiments of the present invention, Figure 8 As shown, along the radial direction of the overflow valve seat 320, the radial thickness of the valve seat abutting the ring platform 325 is T, and T satisfies: T≤0.2mm.

[0310] Furthermore, if Figure 7 As shown, along the radial direction of the overflow valve seat 320, the radial thickness of the valve seat abutting the ring platform 325 is T, and T satisfies: T>0.15mm. For example, the radial thickness T of the valve seat abutting the ring platform 325 can be 0.16mm, 0.17mm, 0.18mm, 0.19mm or 0.2mm.

[0311] It should be noted that the thickness T of the valve seat abutment ring 325, as well as X and Y, will affect the flow area of ​​the fluid between the valve seat abutment ring 325 and the overflow valve plate 330, that is, it will affect the flow area of ​​the fluid at the third flow channel 322. It can be seen from the Bernoulli principle that under the same streamline, the greater the flow rate, the smaller the pressure, which leads to an increase in the upper and lower pressure difference of the overflow valve plate 330. The overflow valve plate 330 is difficult to open under the action of fluid force, and is prone to "adsorption", affecting the consistency of the damping force with the design value. Therefore, the smaller the thickness dimension T of the valve seat abutment ring 325, the better. In order to ensure strength and durability, at least the thickness T of the valve seat abutment ring 325 is required to be ≥10 / material yield strength. For steel, it is more appropriate to take the thickness T of the valve seat abutment ring 325 as 0.15 mm or more. If T is too small, the processing tolerance of the parts must be precise, and the manufacturing cost of the parts is high.

[0312] Therefore, by limiting T≤0.2 mm, it is possible to avoid the radial thickness of the valve seat abutting the annular platform 325 being too large, thereby preventing the adsorption force between the overflow valve seat 320 and the overflow valve plate 330 from being too large, so as to facilitate opening of the overflow valve plate 330 .

[0313] By limiting T>0.15 mm, the radial thickness of the valve seat abutting ring platform 325 can be prevented from being too small, so as to ensure that the structural strength of the valve seat abutting ring platform 325 is high and avoid damage to the overflow valve seat 320.

[0314] In some specific embodiments of the present invention, Fig.12 As shown, along the radial outward direction of the overflow valve seat 320, the distance that the outer circumference of the overflow valve plate 330 exceeds the outer circumference of the valve seat abutting the ring platform 325 is A, and A satisfies 0.15mm≤A≤0.5mm.

[0315] For example, the distance A that the outer circumference of the overflow valve plate 330 exceeds the outer circumference of the valve seat abutting ring platform 325 may be 0.15 mm, 0.2 mm, 0.25 mm, 0.3 mm, 0.35 mm, 0.4 mm, 0.45 mm or 0.5 mm.

[0316] Such arrangement can, on the one hand, prevent the outer circumference of the overflow valve disc 330 from exceeding the outer circumference of the valve seat abutting the annular platform 325 by too small a distance A, and can reduce the machining accuracy requirements for the overflow valve disc 330 and the overflow valve seat 320, which is beneficial to saving the manufacturing cost of parts and components. Moreover, when the flow regulating valve 300 is in the valve closing state and the shock absorber 1 is in the compression condition, the fluid can flow along the guide surface 326 to the side of the outer edge of the overflow valve disc 330 facing the overflow valve seat 320, so as to facilitate pushing the overflow valve disc 330 to open. On the other hand, it can prevent the outer circumference of the overflow valve disc 330 from exceeding the outer circumference of the valve seat abutting the annular platform 325 by too large a distance A, and thus prevent the outer diameter of the overflow valve disc 330 from being too large, which is convenient for assembly.

[0317] In some specific embodiments of the present invention, Fig.30 As shown, the valve seat guide surface 326 includes a first step surface 328 and a second step surface 329 .

[0318] The first step surface 328 in the present invention is the reinforcing step in the priority application.

[0319] The first step surface 328 is connected to the radial outer side of the valve seat abutting ring platform 325 and extends radially along the overflow valve seat 320, and the valve seat abutting ring platform 325 exceeds the first step surface 328 in the direction approaching the overflow valve plate 330, and the second step surface 329 is connected to the radial outer side of the first step surface 328 and extends radially along the overflow valve seat 320, and the first step surface 328 exceeds the second step surface 329 in the direction approaching the overflow valve plate 330.

[0320] With this arrangement, the first step surface 328 can be used to improve the structural strength of the valve seat abutting ring platform 325, the valve seat abutting ring platform 325 is not easy to deform and damage, and the contact area between the valve seat abutting ring platform 325 and the overflow valve plate 330 can be smaller, avoiding excessive pressure difference between the upper and lower parts of the overflow valve plate 330.

[0321] In some other specific embodiments of the present invention, Fig.31 As shown, the valve seat guide surface 326 includes a third step surface 3262 and an inclined surface 3261 .

[0322] The third step surface 3262 is connected to the radial outer side of the valve seat abutting ring platform 325 and extends radially along the overflow valve seat 320, and the valve seat abutting ring platform 325 exceeds the third step surface 3262 in the direction approaching the overflow valve plate 330, and the inclined surface 3261 is connected to the radial outer side of the third step surface 3262, and gradually moves away from the overflow valve plate 330 along the radial outward of the overflow valve seat 320.

[0323] In this way, the distance between the inclined surface 3261 and the overflow valve plate 330 can gradually increase radially outward along the overflow valve seat 320, further reducing the fluid flow resistance between the inclined surface 3261 and the overflow valve plate 330, making the fluid flow smoother and the valve seat guide surface 326 having a better fluid guidance effect.

[0324] In other specific embodiments of the present invention, Fig.32 As shown, the valve seat guide surface 326 includes an inclined surface 3261 , which is connected to the radial outer side of the valve seat abutting ring platform 325 , and gradually moves away from the overflow valve plate 330 along the radial outward direction of the overflow valve seat 320 .

[0325] In which, along the axial direction of the overflow valve seat 320 approaching the overflow valve plate 330 , the valve seat abuts against the end of the ring platform 325 that exceeds the inclined surface 3261 and is adjacent to the overflow valve plate 330 .

[0326] With this arrangement, not only can the fluid be guided by the inclined surface 3261 to reduce the flow resistance of the fluid, but the end of the inclined surface 3261 adjacent to the overflow valve plate 330 can be spaced apart from the overflow valve plate 330, thereby ensuring that the distance between the inclined surface 3261 and the overflow valve plate 330 can be set larger, further reducing the flow resistance of the fluid flowing between the inclined surface 3261 and the overflow valve plate 330, and making the fluid flow smoother.

[0327] In other specific embodiments of the present invention, Fig.33 As shown, the valve seat guide surface 326 includes an inclined surface 3261 , which is connected to the radial outer side of the valve seat abutting ring platform 325 , and gradually moves away from the overflow valve plate 330 along the radial outward direction of the overflow valve seat 320 .

[0328] In which, along the axial direction of the overflow valve seat 320 , one end of the inclined surface 3261 adjacent to the overflow valve plate 330 is flush with one end of the valve seat abutting ring 325 facing the overflow valve plate 330 .

[0329] Such an arrangement can not only guide the fluid through the inclined surface 3261 to reduce the flow resistance of the fluid, but also simplify the structure of the inclined surface 3261 and the valve seat abutting ring platform 325, that is, the structure of the valve seat guide surface 326 and the valve seat abutting ring platform 325 can be simplified, and the structure of the overflow valve seat 320 can be simpler and easier to process.

[0330] In some specific embodiments of the present invention, Figure 30-Figure 32 As shown, along the axial direction of the overflow valve seat 320 toward the overflow valve plate 330, the dimension of the valve seat abutting ring platform 325 beyond the valve seat guide surface 326 adjacent to the overflow valve plate 330 is B, and B satisfies: 0.4mm≤B≤0.6mm. For example, B can be 0.4mm, 0.45mm, 0.5mm, 0.55mm or 0.6mm.

[0331] Such arrangement can, on the one hand, prevent the dimension B of the valve seat abutting platform 325 beyond the end of the valve seat guide surface 326 adjacent to the overflow valve plate 330 from being too small, that is, it can prevent the gap between the valve seat guide surface 326 and the overflow valve plate 330 from being too small, so as to ensure that the flow resistance of the fluid flowing through the valve seat guide surface 326 and the overflow valve plate 330 can be small. On the other hand, it can prevent the dimension B of the valve seat abutting platform 325 beyond the end of the valve seat guide surface 326 adjacent to the overflow valve plate 330 from being too large, that is, it can prevent the length of the valve seat abutting ring body 325 from being too long, so that the structural strength of the valve seat abutting platform 325 can be higher, and the valve seat abutting platform 325 is not easily deformed and damaged.

[0332] In some specific embodiments of the present invention, Figure 31-Figure 33 As shown, the angle between the inclined surface 3261 and the overflow valve plate 330 is β, and β satisfies: 35°≤β≤55°. In this way, the structural strength of the overflow valve seat 320 can be higher, and the inclined surface 3261 has a better guiding effect on the fluid, the fluid flow resistance can be smaller, the flow is smoother, and it is convenient for the fluid to flow along the guide surface 326 and push the overflow valve plate 330.

[0333] In some specific embodiments of the present invention, Figure 1-Figure 5 As shown, the piston 200 includes a piston rod 210 , a piston valve assembly 220 and a valve body 230 .

[0334] The piston valve assembly 220 separates the compression chamber 111 and the recovery chamber 112 in the cylinder 100. The piston valve assembly 220 and the piston rod 210 are connected through the valve body 230. The overflow valve body 310 and the overflow valve seat 320 are installed in the valve body 230. The control valve 400 extends into the valve body 230 and cooperates with the flow regulating valve 300.

[0335] For example, the piston valve assembly 220 can be sleeved on the outer circumference of the valve body 230 and threadedly connected to the outer circumference of the valve body 230 , and the piston rod 210 can be sleeved on the outer circumference of the valve body 230 and threadedly connected to the outer circumference of the valve body 230 .

[0336] By dividing the piston 200 into the piston rod 210 and the piston 200 valve body 230, the installation of the control valve 400 and the flow regulating valve 300 is more convenient, and the piston valve assembly 220 and the piston rod 210 are connected by the valve body 230, which is convenient for disassembly and assembly.

[0337] Furthermore, if Figure 1 and Figure 7 As shown, the overflow valve seat 320 is disposed in the valve body 230, and the overflow valve body 310 and the valve body 230 define a first chamber 241 and a second chamber 242, and the control valve 400 extends into the second chamber 242 to control the on-off of the first chamber 241 and the second chamber 242.

[0338] Among them, the side wall of the valve body 230 is provided with a fourth flow channel 243 and a fifth flow channel 251, the fourth flow channel 243 is connected to the first chamber 241 and the recovery chamber 112 respectively, one end of the fifth flow channel 251 is connected to the recovery chamber 112, and the other end is connected to the second flow channel 311 and the third flow channel 322 respectively.

[0339] Among them, a third chamber 253 can be formed between the fifth flow channel 251 and the overflow valve body 310 and the overflow valve seat 320, and in the axial direction of the cylinder 100, the third chamber 253 and the first chamber 241 are arranged on both sides of the overflow valve body 310. Specifically, the first chamber 241 is located on the side of the overflow valve body 310 facing away from the overflow valve seat 320, and the third chamber 253 is located on the side of the overflow valve body 310 facing the overflow valve seat 320.

[0340] It can be understood that when the flow regulating valve 300 is in the closed state and the shock absorber 1 is in the recovery condition, the fluid flow rate flowing from the fifth flow channel 251 into the third chamber 253 and from the overflow hole 339 or the third overflow notch to the compression chamber 111 is small. At this time, the pressure in the third chamber 253 will rise sharply, while the fluid flow rate flowing from the fourth flow channel 243 into the first chamber 241 and from the first flow channel 314 of the valve body, the second chamber 242 and the second flow channel 315 of the valve body into the compression chamber 111 is large, that is, the pressure in the first chamber 241 will be lower than the pressure in the third chamber 253, so that the fluid in the third chamber 253 can be used to push the overflow valve body 310 to move away from the overflow valve seat 320 to open the second flow channel 311.

[0341] In this way, the fluid in the recovery chamber 112 can flow into the first chamber 241 through the fourth flow channel 243, and, when the second flow channel 311 and / or the third flow channel 322 are opened, the fluid in the compression chamber 111 can flow to the second flow channel 311 and / or the third flow channel 322 through the first flow channel 321, so as to flow to the fifth flow channel 251 through the second flow channel 311 and / or the third flow channel 322, and flow into the recovery chamber 112.

[0342] And, if Figure 7 As shown, the relief valve body 310 is configured with a first valve body flow passage 314 and a second valve body flow passage 315 .

[0343] The first flow channel 314 of the valve body in the present invention is the sixth flow channel in the priority application, and the second flow channel 315 of the valve body in the present invention is the seventh flow channel in the priority application.

[0344] One end of the first flow channel 314 of the valve body is connected to the first chamber 241, the other end of the first flow channel 314 of the valve body is connected to the second chamber 242, and the control valve 400 is matched with the other end of the first flow channel 314 of the valve body. The second flow channel 315 of the valve body passes through the opposite sides of the overflow valve body 310 along the axial direction of the overflow valve body 310, and one end of the second flow channel 315 of the valve body facing away from the overflow valve seat 320 is connected to the second chamber 242, and the other end of the second flow channel 315 of the valve body is connected to the first flow channel 321. The fluid flow of the first flow channel 314 of the valve body and the fluid flow of the second flow channel 315 of the valve body are controlled by the opening and closing of the control valve 400.

[0345] For example, Fig.23As shown, the first flow channel 314 of the valve body may include a radial section 314a and an axial section 314b, the radial section 314a extends radially along the overflow valve body 310, and one end of the radial section 314a passes through the outer circumferential surface of the overflow valve body 310, the axial section 314b extends axially along the overflow valve body 310, one end of the axial section 314b is connected to the other end of the radial section 314a, and the other end of the axial section 314b passes through the side of the overflow valve body 310 facing the pilot valve 600.

[0346] In this way, one end of the radial section 314a can be connected to the first chamber 241, and the other end of the axial section 314b and the end of the second flow channel 315 of the valve body facing the valve core assembly 500 can be connected to the second chamber 242. When the control valve 400 is sealed with the other end of the axial section 314b, the first flow channel 314 of the valve body and the second flow channel 315 of the valve body are disconnected. At this time, the first flow channel 321 cannot be connected to the compression chamber 111 through the first flow channel 314 of the valve body and the second flow channel 315 of the valve body; and when the control valve 400 is separated from the other end of the axial section 314b, the first flow channel 314 of the valve body and the second flow channel 315 of the valve body are connected. At this time, the first flow channel 321 can be connected to the compression chamber 111 through the first flow channel 314 of the valve body and the second flow channel 315 of the valve body.

[0347] Therefore, when the flow regulating valve 300 is in the closed state and the shock absorber 1 is in the recovery condition, when the pressure in the first chamber 241 is relatively high, the fluid in the first chamber 241 will push open the control valve 400 through the first flow channel 314 of the valve body. At this time, the fluid in the first chamber 241 can flow into the second chamber 242 through the first flow channel 314 of the valve body, and then flow to the compression chamber 111 through the second flow channel 315 of the valve body. At this time, the flow rate of the fluid is relatively large, and the shock absorber 1 appears to be "soft".

[0348] In some specific embodiments of the present invention, Figure 7 As shown, a sealing groove 316 is provided on the side of the overflow valve body 310 facing away from the overflow valve seat 320, and the valve body 230 is provided with a sealing ring platform 244, and along the radial direction of the cylinder 100, the sealing ring platform 244 and the inner wall of the valve body 230 are spaced apart, the overflow valve body 310 and the inner wall of the valve body 230 are dynamically sealed, and the sealing groove 316 and the outer wall of the sealing ring platform 244 are dynamically sealed.

[0349] The inner wall of the valve body 230 , the outer wall of the sealing ring 244 and the overflow valve body 310 define a first chamber 241 , and the inner wall of the sealing ring 244 and the overflow valve body 310 define a second chamber 242 .

[0350] In this way, there will be no positional interference between the first chamber 241 and the second chamber 242, and when the control valve 400 controls the first flow channel 314 and the second flow channel 315 of the valve body to be disconnected, the second chamber 242 can be disconnected from the first chamber 241, at which time the fluid in the recovery chamber 112 and the compression chamber 111 will not flow through the first flow channel 314 and the second flow channel 315 of the valve body; and when the fluid pressure in the first chamber 241 is relatively large, the fluid in the first chamber 241 will push the control valve 400 open through the first flow channel 314 of the valve body, and the first chamber 241 is connected to the second chamber 242, at which time the fluid in the recovery chamber 112 and the compression chamber 111 can flow through the first flow channel 314 and the second flow channel 315 of the valve body.

[0351] Furthermore, if Figure 1 and Figure 7 As shown, the valve body 230 includes an upper valve body 240 and a lower valve body 250 .

[0352] Specifically, the upper valve body 240 is connected to the piston rod 210, the lower valve body 250 is connected between the piston valve assembly 220 and the upper valve body 240, and the overflow valve seat 320 is arranged in the lower valve body 250. By dividing the valve body 230 into the upper valve body 240 and the lower valve body 250, the structure of the valve body 230 can be simplified, the processing and manufacturing of the valve body 230 can be facilitated, and the assembly of the piston rod 210, the upper valve body 240, the lower valve body 250, the piston valve assembly 220 and the flow control valve 300 can be simpler and more convenient.

[0353] In addition, the relief valve body 310 and the upper valve body 240 define a first chamber 241 and a second chamber 242. The first chamber 241 may be formed between the outer circumferential surface of the relief valve body 310 and the inner circumferential wall of the upper valve body 240.

[0354] The side wall of the upper valve body 240 is provided with a fourth flow channel 243, and the side wall of the lower valve body 250 is provided with a fifth flow channel 251. In this way, the fluid in the recovery chamber 112 can flow into the first chamber 241 through the fourth flow channel 243, and when the second flow channel 311 and / or the third flow channel 322 are opened, the fluid in the compression chamber 111 can flow to the second flow channel 311 and / or the third flow channel 322 through the first flow channel 321, and flow to the fifth flow channel 251 through the second flow channel 311 and / or the third flow channel 322, and flow into the recovery chamber 112.

[0355] In some specific embodiments of the present invention, Figure 1 As shown, the control valve 400 includes a valve core assembly 500 and a pilot valve 600 .

[0356] The valve core assembly 500 is movably disposed on the piston 200, the pilot valve 600 is connected to the valve core assembly 500, and when the valve core assembly 500 moves, the flow regulating valve 300 is controlled by the pilot valve 600 to adjust the fluid flow between the compression chamber 111 and the recovery chamber 112. In this way, the fluid flow between the compression chamber 111 and the recovery chamber 112 can be controlled by the movement of the valve core assembly 500, so that when the valve core assembly 500 moves the same distance, the heat generated by the fluid due to friction is different, so as to change the vibration reduction effect of the shock absorber 1.

[0357] In some specific embodiments of the present invention, Figure 36-Figure 9 As shown, the pilot valve 600 according to the embodiment of the present invention includes a body portion 610 and a flow guide portion 620 .

[0358] The main body 610 is suitable for connecting with the valve core assembly 500 of the shock absorber 1, and the main body 610 is suitable for cooperating with the flow regulating valve 300 of the shock absorber 1, the guide portion 620 extends along the circumference of the main body 610, and the guide portion 620 extends from the outer periphery of the main body 610 to the side close to the flow regulating valve 300.

[0359] The main body 610 in the present invention is the first main body in the priority application, and the guide part 620 in the present invention is the second guide part in the priority application.

[0360] According to the pilot valve 600 of the embodiment of the present invention, by connecting the main body 610 with 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.

[0361] Furthermore, the flow guide 620 extends along the circumference of the body 610, and the flow guide 620 extends from the outer peripheral edge of the body 610 to the side close to the flow control valve 300. In this arrangement, when the fluid flows out of the flow control valve 300, the fluid will first be stopped by the body 610 and flow radially outward along the body 610, and then the flow guide 620 can stop the fluid and guide it toward the direction of the flow control valve 300, so that the fluid flowing out from the recovery chamber 112 through the flow control valve 300 can quickly pass through the flow control valve 300 and flow to the compression chamber 111, which is conducive to improving the flow speed of the fluid flowing from the recovery chamber 112 to the compression chamber 111.

[0362] Specifically, when the fluid flows from the first flow channel 314 of the valve body to the pilot valve 600, the fluid will first be stopped by the main body 610 and flow radially outward along the main body 610, and then the guide portion 620 can stop the fluid and guide it toward the direction of the overflow valve body 310, so that the fluid flowing out of the first flow channel 314 of the valve body can quickly flow to the second flow channel 315 of the valve body, so as to flow to the compression chamber 111 through the second flow channel 315 of the valve body, which is beneficial to increase the flow speed of the fluid flowing from the recovery chamber 112 to the compression chamber 111.

[0363] In some specific embodiments of the present invention, Figure 37-Figure 39 As shown, the main body 610 is provided with a sealing protrusion 612 , which protrudes from a side of the main body 610 facing the flow regulating valve 300 , and the sealing protrusion 612 cooperates with the flow regulating valve 300 .

[0364] Among them, the flow regulating valve 300 can include a relief valve body 310, which is movably installed in the piston 200, and the relief valve body 310 is constructed with a first valve body flow channel 314 and a second valve body flow channel 315. Part of the sealing protrusion 612 can extend into the first valve body flow channel 314 to control the on-off of the first valve body flow channel 314 and the opening and closing size of the first valve body flow channel 314, thereby controlling the fluid flow of the flow regulating valve 300 through the first valve body flow channel 314.

[0365] In some specific embodiments of the present invention, Figure 36-Figure 39 As shown, the main body 610 is further provided with a main body balancing hole 611 , which penetrates the main body 610 along the axial direction of the pilot valve 600 , and is located between the guide portion 620 and the sealing protrusion 612 along the radial direction of the main body 610 .

[0366] The main body balancing hole 611 in the present invention is the first balancing hole in the priority application.

[0367] By setting a body balancing hole 611 on the main body 610, part of the fluid flowing out of the first flow channel 314 of the valve body can flow upward through the body balancing hole 611, thereby reducing the impact force of the fluid flowing out of the first flow channel 314 of the valve body on the pilot valve 600, thereby reducing the impact force of the fluid on the valve core assembly 500, so that the damping force of the shock absorber 1 can be kept stable, which is beneficial to improving the ride comfort of the vehicle.

[0368] In some specific embodiments of the present invention, Fig.36 As shown, there are multiple body balancing holes 611, and the multiple body balancing holes 611 are arranged at intervals along the circumference of the body portion 610. In this way, the fluid can be discharged upward through the multiple body balancing holes 611 at the same time, further reducing the impact force of the fluid on the pilot valve 600, and the buffering effect is better.

[0369] In some specific embodiments of the present invention, Fig.39 As shown, along the axial direction of the pilot valve 600 , the sealing protrusion 612 protrudes from the flow guide portion 620 .

[0370] That is to say, along the axial direction of the pilot valve 600, close to the flow regulating valve 300, the sealing protrusion 612 can exceed the guide portion 620, so that the axial extension dimension of the sealing protrusion 612 along the pilot valve 600 can be larger, and when the sealing protrusion 612 cooperates with the flow regulating valve 300, the guide portion 620 will not interfere with the position of the flow regulating valve 300, and the structural setting is more reasonable, so that at least a part of the sealing protrusion 612 can extend into the first flow channel 314 of the valve body to control the fluid flow passing through the first flow channel 314 of the valve body.

[0371] In some specific embodiments of the present invention, Fig.38 and Fig.39 As shown, along the axial direction of the pilot valve 600 extending away from the body portion 610 , the sealing protrusion 612 is configured to be a truncated cone with a decreasing cross-sectional area.

[0372] That is, along the axial direction of the pilot valve 600 approaching the flow regulating valve 300, the cross-sectional area of ​​the sealing protrusion 612 can be gradually reduced. With this arrangement, on the one hand, the sealing protrusion 612 itself can be used for assembly guidance so that the sealing protrusion 612 can extend into the first flow channel 314 of the valve body and seal with the first flow channel 314 of the valve body. On the other hand, the sealing protrusion 612 can be used to guide the fluid flowing out of the first flow channel 314 of the valve body to make the fluid flow smoother, which is beneficial to improving the stability of the damping force of the shock absorber 1.

[0373] In addition, such a configuration can also improve the versatility of the pilot valve 600. The sealing protrusion 612 can be adapted to a plurality of valve body first flow channels 314 with different inner diameters, thereby enabling the pilot valve 600 to be adapted to a plurality of different flow control valves 300, thereby achieving higher versatility.

[0374] In some specific embodiments of the present invention, Fig.39 As shown, a body flow guiding surface 613 is formed between the sealing protrusion 612 and the flow guiding portion 620 on one side surface of the body portion 610 facing the flow regulating valve 300 .

[0375] Among them, the main body guide surface 613 can play the role of transition connection, which is beneficial to improving the overall structural strength of the pilot valve 600, and the main body guide surface 613 can also guide the fluid flowing out of the first flow channel 314 of the valve body, further improving the smoothness of the fluid flow, and the damping force of the shock absorber 1 is more stable.

[0376] Furthermore, if Fig.39 As shown, along the axial direction of the pilot valve 600 extending in a direction away from the main body 610 , the main body guide surface 613 is configured as a truncated conical surface with a decreasing cross-sectional area.

[0377] That is, along the axial direction of the pilot valve 600, approaching the flow regulating valve 300, the cross-sectional area of ​​the main body guide surface 613 can also be gradually reduced, so that the main body guide surface 613 can smoothly transition between the main body 610 and the sealing protrusion 612. When the fluid flowing out of the first flow channel 314 of the valve body impacts the pilot valve 600, the sealing protrusion 612 and the main body guide surface 613 can better guide the fluid to make the fluid flow in the shock absorber 1 smoother.

[0378] In some specific embodiments of the present invention, Figure 36-Figure 38 As shown, the guide portion 620 is configured as a circular ring extending circumferentially along the outer periphery of the main body 610. In this way, the annular guide portion 620 can stop and guide the fluid in any radial direction along the main body 610, which is beneficial to improving the stopping and guiding effect of the guide portion 620 on the fluid, so that most of the fluid can quickly flow to the compression chamber 111.

[0379] In some specific embodiments of the present invention, Fig.36 and Fig.39 As shown, the main body 610 is further provided with a guide rod connecting groove 639 , which is provided on a side of the main body 610 facing the valve core assembly 500 , and the valve core assembly 500 is connected to the guide rod connecting groove 639 .

[0380] Specifically, the guide rod connecting groove 639 can be connected to the guide rod 530 of the valve core assembly 500, and then the pilot valve 600 and the guide rod 530 of the valve core assembly 500 can be connected together to achieve 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.

[0381] In some specific embodiments of the present invention, Fig.11 and Fig.13 As shown, the flow regulating valve 300 includes a relief valve body 310 , which is provided with a first valve body flow channel 314 and a second valve body flow channel 315 . The first valve body flow channel 314 is connected to the recovery chamber 112 , and the second valve body flow channel 315 is connected to the compression chamber 111 .

[0382] The sealing protrusion 612 of the pilot valve 600 is matched with the first flow channel 314 of the valve body to control the opening and closing of the first flow channel 314 and the second flow channel 315 of the valve body.

[0383] Specifically, one end of the first flow channel 314 of the valve body can be connected to one end of the second flow channel 315 of the valve body, the other end of the first flow channel 314 of the valve body is connected to the recovery chamber 112, and the other end of the second flow channel 315 of the valve body is connected to the compression chamber 111. The control valve 400 cooperates with the other end of the first flow channel 314 of the valve body to control the opening and closing of the first flow channel 314 and the second flow channel 315 of the valve body. The second flow channel 315 of the valve body can pass through the opposite sides of the overflow valve body 310 along the axial direction of the overflow valve body 310. The fluid flow of the first flow channel 314 of the valve body and the fluid flow of the second flow channel 315 of the valve body are controlled by the opening and closing of the pilot valve 600.

[0384] In some specific embodiments of the present invention, Fig.23 , Fig.39 and Fig.40 As shown, the inner diameter of the end of the first flow channel 314 of the valve body facing the pilot valve 600 is d1, the inner diameter of the guide portion 620 is d2, the angle between the radial outer side of the sealing protrusion 612 and the axial direction of the pilot valve 600 is α, and the length of the guide portion 620 exceeding the main body 610 in the direction close to the relief valve body 310 along the axial direction of the pilot valve 600 is h. Among them, h, d1, d2 and α satisfy:

[0385] In this way, when the fluid flows out of the first flow channel 314 of the valve body at a faster flow rate, the pilot valve 600 can also more effectively use the guide part 620 to stop and guide the fluid, that is, the guide part 620 can better alleviate the fluid impact and more effectively improve the flow stability of the fluid.

[0386] Specifically, by limiting In this way, the length of the guide part 620 exceeding the main body 610 in the direction close to the overflow valve body 310 can be longer, and the fluid flowing out of the first flow channel 314 of the valve body will flow to the guide part 620 after hitting the sealing protrusion 612 and the main body 610 in sequence. At this time, it can be ensured that most of the fluid rebounded by the main body 610 can be stopped by the guide part 620, so that the guide part can guide most of the fluid, and the guide effect of the guide part 620 can be better.

[0387] In some specific embodiments of the present invention, Figure 7 As shown, the projection of the main body 610 on the overflow valve body 310 along the axial direction of the cylinder 100 at least covers part of the second flow channel 315 of the valve body. In other words, at least part of the second flow channel 315 of the valve body is located directly below the main body 610. In this way, the fluid can flow toward the direction close to the overflow valve body 310 under the stopper and guide of the main body 610 and the guide part 620, and the fluid can flow into the second flow channel 315 of the valve body better, so that the fluid flows more smoothly.

[0388] In other specific embodiments of the present invention, Figure 41-Figure 45 As shown, the pilot valve 600 includes 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.

[0389] One side of the base 630 is suitable for connecting with 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 for the pilot valve plug 640 to move away from the base 630.

[0390] 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 regulating valve 300, the pilot valve 600 can also drive the valve core assembly 500 to move, thereby adjusting the fluid flow of the flow regulating valve 300.

[0391] Furthermore, by dividing the pilot valve 600 into a base 630, a pilot valve plug 640 and a pilot valve elastic member 650, and the pilot valve elastic member 650 is 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 can provide an elastic force for the pilot valve plug 640 to move away from the base 630. In this way, 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, and when the shock absorber 1 is not powered or is in a low current state, the fluid flowing out of the flow control valve 300 can switch the pilot valve plug 640 multiple times in an instant, and then the impact force of the fluid can be buffered by the pilot valve plug 640 and the pilot valve elastic member 650, which is conducive to reducing the impact force of the fluid on the valve core assembly 500, so that the damping force of the shock absorber 1 is more stable.

[0392] Thus, 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.

[0393] In some specific embodiments of the present invention, Fig.46 and Fig.47 As shown, the pilot valve elastic member 650 includes an outer ring body 651 and an inner elastic arm 652 .

[0394] 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 .

[0395] That is to say, the pilot valve elastic member 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 member 650 so that the pilot valve plug 640 can move relative to the base 630, but the pilot valve elastic member 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 to make the damping force of the shock absorber 1 more stable.

[0396] Furthermore, if Fig.47 As shown, the width of the inner elastic arm 652 decreases gradually in the radial inward direction of the outer ring body 651 .

[0397] 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, thereby generating 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 easy to be damaged or failed.

[0398] In some specific embodiments of the present invention, Fig.46 and Fig.47 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 .

[0399] 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 .

[0400] By setting multiple inner elastic arms 652, not only can a single inner elastic arm 652 be set smaller to facilitate elastic deformation of the single inner elastic arm 652, but multiple inner elastic arms 652 can also be deformed simultaneously to provide an elastic force to keep 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 member 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.

[0401] In some specific embodiments of the present invention, Fig.47As shown, 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 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, along the radial direction of the pilot valve elastic member 650, the lengths of the multiple inner elastic arms 652 can be kept consistent.

[0402] Such a configuration can not only simplify the structure of the multiple inner elastic arms 652, so that the structure of the pilot valve elastic member 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, thereby further improving the stability of the elastic force generated by the pilot valve elastic member 650.

[0403] 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.

[0404] 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 to 50N.

[0405] For example, the elastic force provided by the pilot valve elastic member 650 to the pilot valve plug 640 may be 10N, 15N, 20N, 25N, 30N, 35N, 40N, 45N or 50N. This arrangement 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, so as to ensure that the pilot valve plug 640 can move away from the base 630 under the action of the pilot valve elastic member 650, and the pilot valve 600 has a better buffering effect 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, so as to make the deformation of the pilot valve elastic member 650 better to absorb the impact of the fluid.

[0406] In some specific embodiments of the present invention, Fig.45 and Fig.46 As shown, the base 630 includes a base body portion 631 and a base guide portion 632 .

[0407] 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.

[0408] The base body portion 631 is suitable for connecting with 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 peripheral edge of the base body portion 631 toward one side of the pilot valve plug 640 .

[0409] In this way, when the fluid moves upward and hits the base body 631 and the base body 631 rebounds and flows downward, the base guide portion 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.

[0410] Furthermore, if Fig.42 and Fig.43 As shown, the base guide portion 632 is configured 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 .

[0411] In this way, not only can the annular base guide portion 632 be utilized 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 utilized to limit the pilot valve plug 640 and the pilot valve elastic member 650 in the radial direction of the base 630, thereby 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 the connection is more reliable.

[0412] In some specific embodiments of the present invention, Figure 41-43 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 .

[0413] Among them, the stop structure 633 can be a riveted structure. In this way, after the pilot valve elastic member 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 member 650 to fix the base 630, the second elastic member and the pilot valve plug 640 together, so as to prevent the pilot valve elastic member 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.

[0414] Furthermore, if Fig.42 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 .

[0415] By having multiple stop structures 633 stop at the side of the pilot valve plug 640 that is 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 member 650. The pilot valve plug 640 and the pilot valve elastic member 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 member 650 and the pilot valve plug 640 are stably connected and fixed to the base 630.

[0416] In some specific embodiments of the present invention, Fig.43 As shown, the base guide portion 632 includes a first guide segment 6321 and a second guide segment 6322 .

[0417] 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 .

[0418] 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.

[0419] 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 the 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, it is possible to avoid the stop structure 633 compressing the axial space of the first guide section 6321, so as to fix the pilot valve elastic member 650 and the pilot valve plug 640 in the base 630, and the structural setting is more reasonable.

[0420] In some specific embodiments of the present invention, Fig.42 As shown, the stop structure 633 is constructed as a stop rib that extends obliquely toward the central axis of the base body 631 relative to the base guide portion 632 .

[0421] In other words, the stop rib can extend obliquely toward the central axis of the base body 631 as the base flow guide portion 632 is away from the base body 631 in the axial direction, that is, the distance between the stop rib and the side wall on the other radial side of the base flow guide portion 632 gradually decreases as the base flow guide portion 632 is away from the base body 631 in the axial direction. In this way, the distance between the end of the stop rib away from the base body 631 and the side wall of the base flow guide portion 632 can be small, and then the stop rib can be stopped at the side of the pilot valve plug 640 facing away from the main body of the base 630, so as to fix the base 630, the pilot valve elastic member 650 and the pilot valve plug 640 together.

[0422] Furthermore, the stop 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 .

[0423] By providing the notch 635 on the base flow guide 632, not only can the position interference between the stop rib and the corresponding part of the base flow guide 632 be avoided, but the stop rib can also be disconnected from the corresponding part of the base flow guide 632, so as to facilitate 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 that faces away from the main body of the base 630, so that the stop rib can be used to stop the pilot valve elastic member 650 and the pilot valve plug 640, and prevent the pilot valve elastic member 650 and the pilot valve plug 640 from being separated from the base 630.

[0424] In some specific embodiments of the present invention, Fig.43 and Fig.45 As shown, a base abutment platform 636 protruding toward the pilot valve elastic member 650 is formed in the middle of one 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.

[0425] 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.

[0426] Thus, the middle part of the side of the base main body 631 facing the pilot valve elastic member 650 can protrude toward the direction close to the pilot valve elastic member 650, so that the radial inner side of the pilot valve elastic member 650 can abut against the base abutment platform 636, and the radial outer side of the pilot valve elastic member 650 can be spaced from the base avoidance groove 637, so that a deformable space can be reserved for the pilot valve elastic member 650, so that the pilot valve elastic member 650 can be deformed 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.

[0427] Furthermore, the bottom of the base avoidance groove 637 is a circular plane, that is, the base avoidance groove 637 can be constructed as 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.

[0428] Or, if Fig.43 As shown, the bottom of the base avoidance groove 637 is a conical surface away from the pilot valve elastic member 650 in the radial outward direction of the base body portion 631 .

[0429] With such an arrangement, the distance between the bottom of the base avoidance groove 637 and the pilot valve elastic member 650 can gradually increase radially outwardly along the base body portion 631. When the pilot valve plug 640 squeezes the outer ring body 651 of the pilot valve elastic member 650 and deforms toward 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 portion 631 at the position of the base avoidance groove 637 can be gradually reduced. The influence of the base avoidance groove 637 on the structural strength of the base body portion 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.

[0430] In some specific embodiments of the present invention, Fig.41 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.

[0431] In this way, when the fluid flows out from 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.

[0432] It should be noted that the radial outer side of the pilot valve elastic member 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 portion 632, so as to facilitate the fluid to flow from the gap between the pilot valve plug 640 and the base guide portion 632, and from the gap between the pilot valve elastic member 650 and the base guide portion 632 to the base balance hole 634.

[0433] Furthermore, if Fig.41 As shown, there are multiple base balancing holes 634, and the multiple base balancing holes 634 are spaced apart and distributed 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.

[0434] In some specific embodiments of the present invention, Fig.41 and Fig.43 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 .

[0435] That is to say, the annular boss 638 is arranged on the side of the base body portion 631 facing the valve core assembly 500. For example, the annular boss 638 can be arranged in the middle of the base body portion 631 in the radial direction and protrude from the side of the base body portion 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 portion 631 will not be destroyed, thereby ensuring that the structural strength of the base body portion 631 can be relatively high.

[0436] 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 between the pilot valve 600 and the guide rod 530, and the pilot valve 600 and the guide rod 530 move together.

[0437] In some specific embodiments of the present invention, Figure 49-Figure 51 As shown, the pilot valve plug 640 includes a plug sheet 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.

[0438] The plug 641 has an edge facing the pilot valve elastic member 650 which abuts against the pilot valve elastic member 650 and has a plug avoidance groove 642 formed radially inwardly. The plug head 643 is disposed at the middle of the plug 641 facing away from the pilot valve elastic member 650 .

[0439] Specifically, the stop structure 633 can stop at the side of the plug piece 641 facing away from the main body of the base 630, and the plug head 643 can protrude from the side of the plug piece 641 facing away from the pilot valve elastic member 650. The pilot valve plug 640 can utilize the plug head 643 and the flow regulating valve 300 to cooperate to adjust the fluid flow of the flow regulating valve 300.

[0440] 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.

[0441] In some specific embodiments of the present invention, Fig.49 and Fig.51 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 member 650, so that the pilot valve elastic member 650 can have a larger deformable space.

[0442] Alternatively, the bottom of the plug plate 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 plate 641. In this way, along the radial direction inward of the pilot valve plug 640, the side of the pilot valve plug 640 facing the base 630 can gradually move away from the base 630. In other words, along the axial direction of the cylinder 100, the distance between the radial outer side of the pilot valve plug 640 and the base 630 is smaller than the distance between the radial inner side of the pilot valve plug 640 and the base 630.

[0443] 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 be gradually reduced. The influence of the plug avoidance groove 642 on the structural strength of the pilot valve plug 640 can be minimized, which is beneficial to ensuring the structural strength of the pilot valve plug 640, so that the structure of the pilot valve 600 is more stable and reliable.

[0444] In some specific embodiments of the present invention, Figure 1 and Figure 6 As shown, the valve core assembly 500 according to the embodiment of the present invention includes a valve core 520 and a static iron core 430 .

[0445] The valve core 520 is movably arranged in the piston 200 of the shock absorber 1, the static iron core 430 is arranged on the side of the valve core 520 facing the flow regulating valve 300 of the shock absorber 1, and the side of the static iron core 430 facing the valve core 520 is provided with a sink groove 432; wherein, when the flow regulating valve 300 is in an open valve state, along the axial direction of the valve core assembly 500, the side of the valve core 520 facing the static iron core 430 is located in the sink groove 432.

[0446] Among them, the flow regulating valve 300 in the present invention is in an open valve state, which refers to an initial state when the flow regulating valve 300 is not squeezed by external pressure and there is no fluid flowing in the flow regulating valve 300; and the flow regulating valve 300 is in a closed valve state, which refers to an initial state when the flow regulating valve 300 is squeezed by external force and the overflow valve seat and overflow valve body of the flow regulating valve 300 are abutted and closed.

[0447] Among them, it should be noted that, considering the convenience of algorithm and adjustment, the FV (damping force-speed) curve of the shock absorber 1 often has the following characteristics: 1. The damping force changes linearly with the current at the same speed point; 2. The damping force changes linearly with the speed within a certain range at the same current. These two linearities put forward high requirements on the proportional characteristics of the electromagnetic force: 1. The electromagnetic force has high linearity under different currents; 2. The electromagnetic force has good linearity within the movement stroke of the valve body 230 (preferably the slope of the electromagnetic force-stroke curve is ≥ 0, that is, the electromagnetic force gradually increases or remains unchanged during the process of the coil assembly 410 being powered on, which is conducive to maintaining pressure stability).

[0448] According to the magnetic field strength that can be calculated based on Ampere's circuit theorem in Maxwell's equations, the electromagnetic force is solved through the relationship between magnetic flux density, magnetic flux and magnetic field strength. The proportional electromagnet contains a magnetic isolation ring 420. Therefore, under the premise that the current and the coil remain unchanged, that is, the total magnetic field strength remains unchanged, the magnetic flux is inversely proportional to the magnetic resistance. In order to make the axial force constant within the movement stroke of the valve core 520, the magnetic resistance ratio in the axial force and radial force directions needs to be kept constant or gradually decreased during the process of the valve core 520 opening this movement direction. The magnetic resistance in both directions is inversely proportional to the air gap D and directly proportional to the contact length L.

[0449] Therefore, when the flow regulating valve 300 is in the open valve state, the side of the valve core 520 facing the static iron core 430 is set in the groove 432. In this way, when the valve core 520 moves toward the static iron core 430, the end of the valve core 520 facing the static iron core 430 can always be located in the groove 432, so that the axial magnetic resistance ratio of the valve core 520 can be kept constant, so that when the valve core 520 moves along the axial direction of the shock absorber 1, the electromagnetic force exerted on the valve core 520 can be kept constant, which is beneficial to improving the stability of the damping force of the shock absorber 1, and the linearity of the damping force change of the shock absorber 1 can be better, so as to facilitate the adjustment of the damping force of the shock absorber 1.

[0450] In this way, the electromagnetic force of the valve core 520 of the valve core assembly 500 according to the embodiment of the present invention can be kept constant when it moves along its axial direction, so as to ensure that the axial force of the valve core 520 during the movement can be maintained stable, thereby improving the stability of the damping force of the shock absorber 1.

[0451] In some embodiments of the present invention, Figure 6 As shown, when the flow control valve 300 is in the open state, along the axial direction of the valve core assembly 500, the distance between the side of the valve core 520 facing the static iron core 430 and the notch of the sink 432 is L1, and L1 satisfies: 0.5mm>L1>0.1mm. For example, L1 can be 0.2mm, 0.3mm or 0.4mm.

[0452] In this way, on the one hand, it is possible to avoid the side of the valve core 520 facing the static iron core 430 from being too far away from the slot of the sink groove 432, that is, it is possible to avoid the valve core 520 from excessively extending into the sink groove 432, so that there is sufficient space for the valve core 520 to move toward the bottom wall of the sink groove 432. On the other hand, it is possible to avoid the side of the valve core 520 facing the static iron core 430 from being too far away from the slot of the sink groove 432, so that it is possible to ensure that the side of the valve core 520 facing the static iron core 430 can be located in the sink groove 432, and when the valve core 520 moves, the axial magnetic resistance ratio of the valve core 520 can be kept constant, so that when the valve core 520 moves along the axial direction of the shock absorber 1, the electromagnetic force acting on the valve core 520 can be kept constant.

[0453] In some embodiments of the present invention, Figure 6 As shown, when the flow control valve 300 is in the valve opening state, along the axial direction of the valve core assembly 500, the distance between the side of the valve core 520 facing the static iron core 430 and the bottom wall of the sink 432 is L2, and L2 satisfies: 2mm>L2>0.7mm. For example, L2 can be 0.8mm, 1mm, 1.2mm, 1.4mm, 1.6mm or 1.8mm.

[0454] In this way, the valve core 520 can be far away from the bottom wall of the groove 432 in the initial position, so as to reserve sufficient space in the groove 432 for the valve core 520 to move, and avoid the valve core 520 being too far away from the bottom wall of the groove 432 to cause space waste.

[0455] In some embodiments of the present invention, the outer diameter of the valve core 520 is D1, the inner diameter of the sink groove 432 is D2, and the depth of the sink groove 432 is L. The depth L of the sink groove 432 is L1+L2.

[0456] Among them, when the valve core 520 moves in the direction close to the static iron core 430, the distance between the inner wall of the groove 432 and the outer wall of the valve core 520 remains unchanged, so that (D2-D1)×L remains unchanged; or, when the valve core 520 moves in the direction close to the static iron core 430, the distance between the inner wall of the groove 432 and the outer wall of the valve core 520 gradually increases, so that (D2-D1)×L gradually increases.

[0457] With this arrangement, after the coil assembly 410 is energized, the value of the air gap D×the depth L of the groove 432 of the valve core 520 remains almost unchanged or gradually increases during the movement, so that the axial electromagnetic force of the valve core assembly 500 remains unchanged or gradually increases during the movement of the valve core 520, ensuring that the FV diagram force value of the shock absorber 1 has high linearity at different speeds and different currents, and at the same time, the power curve has small fluctuations, and the damping force stability of the shock absorber 1 is higher, so as to facilitate the adjustment of the damping force of the shock absorber 1.

[0458] In some embodiments of the present invention, Figure 1 and Figure 6 As shown, the valve core assembly 500 further includes a coil assembly 410 and a guide rod 530 .

[0459] The coil assembly 410 is disposed in the piston 200 , and when the coil assembly 410 is energized, the valve core 520 generates magnetism and attracts the static iron core 430 , the guide rod 530 is movably disposed in the static iron core 430 , and the guide rod 530 is disposed in the valve core 520 and connected to the valve core 520 .

[0460] In this way, when the valve core 520 moves, the valve core 520 and the guide rod 530 can move together relative to the core cover 510, so that the guide rod 530 can be used to drive the pilot valve 600 to move, so that the pilot valve 600 can be used to control the fluid flow of the flow control valve 300.

[0461] In addition, the guide rod 530 can also guide the axial movement of the valve core 520 to prevent the valve core 520 from shaking radially, making the movement more stable.

[0462] In some embodiments of the present invention, Figure 1 and Figure 6 As shown, the valve core 520 is provided with a valve core balancing flow channel 521 , and the valve core balancing flow channel 521 penetrates the opposite sides of the valve core 520 along the axial direction of the valve core 520 .

[0463] The valve core balancing channel 521 in the present invention is the eighth channel in the priority application.

[0464] In this way, when the valve core 520 moves, the air pressure in the space on both sides of the moving direction of the valve core 520 can be balanced through the valve core balancing channel 521, so that the movement of the valve core 520 is more stable, and the movement of the pilot valve 600 is also more stable.

[0465] In some embodiments of the present invention, Figure 1 and Figure 6 As shown, the valve core assembly 500 further includes a first valve core elastic member 540 and a second valve core elastic member 550 .

[0466] The first valve core elastic member 540 in the present invention is the third elastic member in the priority application, and the second valve core elastic member 550 in the present invention is the fourth elastic member in the priority application.

[0467] The first valve core elastic member 540 and the second valve core elastic member 550 are sleeved on the guide rod 530 and are respectively arranged on both sides of the moving direction of the valve core 520. The first valve core elastic member 540 and the second valve core elastic member 550 jointly apply elastic force to the valve core 520 to keep the position of the valve core 520 stable. In this way, under the action of the first valve core elastic member 540 and the second valve core elastic member 550, if the valve core 520 is not subjected to external force, both sides of the moving direction of the valve core 520 will not contact other objects, that is, the valve core 520 can remain suspended, thereby preventing the valve core balance flow channel 521 from being blocked and ensuring the smoothness of the gas.

[0468] In some embodiments of the present invention, Figure 6 As shown, a first groove 522 and a second groove 523 are provided at two axial ends of the valve core 520 .

[0469] The first valve core elastic member 540 is disposed in the first groove 522 and abuts between the groove bottom of the first groove 522 and the iron core cover 510 of the shock absorber 1 . The second valve core elastic member 550 is disposed in the second groove 523 and abuts between the groove bottom of the second groove 523 and the static iron core 430 .

[0470] By setting the first groove 522 and the second groove 523, the first groove 522 can fix the first valve core elastic part 540 and radially position the first valve core elastic part 540 to avoid radial shaking of the first valve core elastic part 540, which is beneficial to improving the fixing stability of the first valve core elastic part 540. The second groove 523 can fix the second valve core elastic part 550 and radially position the second valve core elastic part 550 to avoid radial shaking of the second valve core elastic part 550, which is beneficial to improving the fixing stability of the second valve core elastic part 550.

[0471] In some embodiments of the present invention, Figure 6 As shown, the static iron core 430 is provided with a through hole, and a first guide sleeve 531 is provided in the through hole. The guide rod 530 passes through the first guide sleeve 531, so that the movement of the guide rod 530 can be guided by the first guide sleeve 531, so that the guide rod 530 can move along the axial direction of the shock absorber 1, and the first guide sleeve 531 can avoid mutual wear between the guide rod 530 and the static iron core 430.

[0472] The first guide sleeve 531 in the present invention is the guide sleeve in the priority application.

[0473] In some embodiments of the present invention, Figure 1 As shown, the piston 200 includes a piston rod 210 , a piston valve assembly 220 and a valve body 230 .

[0474] The piston valve assembly 220 separates the compression chamber 111 and the recovery chamber 112 in the cylinder 100. The piston valve assembly 220 and the piston rod 210 are connected through the valve body 230. The flow regulating valve 300 is installed in the valve body. The pilot valve 600 extends into the valve body 230 and cooperates with the flow regulating valve 300.

[0475] For example, the piston valve assembly 220 can be sleeved on the outer circumference of the valve body 230 and threadedly connected to the outer circumference of the valve body 230 , and the piston rod 210 can be sleeved on the outer circumference of the valve body 230 and threadedly connected to the outer circumference of the valve body 230 .

[0476] By dividing the piston 200 into the piston rod 210 and the piston 200 valve body 230, the installation of the control valve 400 and the flow regulating valve 300 is more convenient, and the piston valve assembly 220 and the piston rod 210 are connected by the valve body 230, which is convenient for disassembly and assembly.

[0477] In some embodiments of the present invention, Figure 1 and Figure 6 As shown, the control valve 400 further includes a core cover 510 and a magnetic isolation ring 420 .

[0478] The core cover 510 is fixed in the piston rod 210, and the magnetic isolation ring 420 is installed in the piston rod 210. The magnetic isolation ring 420 is located between the core cover 510 and the valve body 230 and separates the coil assembly 410 and the valve body 230 of the valve core assembly 500. Specifically, the coil assembly 410 is installed in the piston rod 210, and the core cover 510 is installed on the coil assembly 410.

[0479] The valve body 230 may be made of a magnetic material, and the valve core 520 may also be made of a magnetic material, for example, the valve body 230 and the valve core 520 may be made of metal iron. In this way, after the coil assembly 410 is energized, the valve core 520 may generate magnetism to attract the valve body 230, so that the valve core 520 may move toward the valve body 230.

[0480] In addition, the core cover 510 can fix the relative positions of the coil assembly 410 and the valve core 520, and can limit the moving direction of the valve core 520, wherein the core cover 510 can be made of magnetic material, for example, the core cover 510 can be made of metal iron, so that the core cover 510 can also generate magnetism under the action of the coil assembly 410, and the core cover 510 is in contact with the valve core 520, and the magnetic force between the valve core 520 and the valve body 230 can be stronger.

[0481] In some embodiments of the present invention, Figure 6 As shown, a mounting recess 511 is provided at the top of the core cover 510, a second guide sleeve 512 is provided in the mounting recess 511, and a guide rod 530 of the valve core assembly 500 is passed through the second guide sleeve 512. In this way, the second guide sleeve 512 can be used to guide the movement of the guide rod 530, so that the guide rod 530 can move along the axial direction of the shock absorber 1, and the second guide sleeve 512 can prevent the guide rod 530 and the core cover 510 from wearing each other.

[0482] The second guide sleeve 512 in the present invention is the guide sleeve in the priority application.

[0483] In some embodiments of the present invention, Figure 6As shown, the inner circumference of the core cover 510 is provided with a first step portion 513, and the outer circumference of the valve core 520 is provided with a second step portion 524, and the first step portion 513 is stopped at the side of the second step portion 524 facing away from the static iron core 430. The axial movement of the valve core 520 can be limited by the first step portion 513 stopping the second step portion 524, that is, when the valve core 520 moves to the extreme position in the direction away from the static iron core 430, the second step portion 524 can stop the first step portion 513, and the structural setting is more reasonable.

[0484] The following example illustrates the fluid flow path of the shock absorber 1 in the recovery state and the compression state when the flow control valve 300 is in the open state:

[0485] 1. If Figure 2 As shown, when the flow regulating valve 300 is in the closed state and the shock absorber 1 is in the recovery condition, the piston rod 210 vibrates upward and the pressure in the recovery chamber 112 increases. At this time, the elastic force of the valve body elastic member 360 supports the overflow valve body 310, and the pressure in the second chamber increases to make the overflow valve plate 330 fit the overflow valve seat 320. The fluid in the recovery chamber 112 can flow to the compression chamber 111 through the second flow channel 311, the connecting hole 331 and the first flow channel 321. The flow rate of the fluid is large and the fluid damping is small. The shock absorber 1 appears to be "soft". At the same time, the fluid in the liquid storage chamber 121 can also flow into the compression chamber 111.

[0486] 2. Figure 3 As shown, when the flow regulating valve 300 is in the closed state and the shock absorber 1 is in the compression condition, the piston rod 210 vibrates downward, the pressure in the compression chamber 111 increases, and the pressure in the first flow channel 321 increases, so that the overflow valve body 310 and the overflow valve plate 330 move away from the overflow valve seat 320, and the overflow valve plate 330 fits the overflow valve body 310. The fluid in the compression chamber 111 can flow into the recovery chamber 112 from the third flow channel 322 and the first flow channel 321, and the fluid flow rate is large, the fluid damping is small, and the shock absorber 1 appears to be "soft". At the same time, the fluid in the compression chamber 111 can also flow into the liquid storage chamber 121.

[0487] The following example illustrates the fluid flow path of the shock absorber 1 in the recovery state and the compression state when the flow control valve 300 is in the open state:

[0488] It should be noted that, in the present invention, the flow regulating valve 300 is in an open valve state, which refers to the state of the flow regulating valve 300 when there is no external pressure squeezing the flow regulating valve 300, for example, the valve core assembly 500 has no force on the flow regulating valve 300; and, the flow regulating valve 300 is in a closed valve state, which refers to the state of the flow regulating valve 300 when the flow regulating valve 300 is squeezed by an external force, for example, the valve core assembly 500 applies a force to the flow regulating valve 300.

[0489] 1. If Figure 2 As shown, when the flow regulating valve 300 is in the open state and the shock absorber 1 is in the recovery condition, the piston rod 210 vibrates upward and the pressure in the recovery chamber 112 increases. At this time, the elastic force of the valve body elastic member supports the overflow valve body 310, and the pressure in the second chamber increases to make the overflow valve plate 330 fit the overflow valve seat 320. The fluid in the recovery chamber 112 can flow to the compression chamber 111 through the second flow channel 311, the connecting hole 331 and the first flow channel 321. The flow rate of the fluid is large and the fluid damping is small. The shock absorber 1 appears to be "soft". At the same time, the fluid in the liquid storage chamber 121 can also flow into the compression chamber 111.

[0490] 2. Figure 3 As shown, when the flow regulating valve 300 is in the open valve state and the shock absorber 1 is in the compression condition, the piston rod 210 vibrates downward, the pressure in the compression chamber 111 increases, and the pressure in the first flow channel 321 increases, so that the overflow valve body 310 and the overflow valve plate 330 move away from the overflow valve seat 320, and the overflow valve plate 330 fits the overflow valve body 310. The fluid in the compression chamber 111 can flow into the recovery chamber 112 from the third flow channel 322 and the first flow channel 321, and the fluid flow rate is large, the fluid damping is small, and the shock absorber 1 appears to be "soft". At the same time, the fluid in the compression chamber 111 can also flow into the liquid storage chamber 121.

[0491] The following example illustrates the fluid flow path of the shock absorber 1 in the recovery state and the compression state when the flow control valve 300 is in the closed state:

[0492] 1. If Figure 4 As shown, when the flow regulating valve 300 is in the valve closing state and the shock absorber 1 is in the recovery state, the valve body 230 is pushed by the magnetic force to push the pilot valve 600 and the overflow valve body 310, the overflow valve plate 330 abuts against the overflow valve seat 320, the second flow channel 311 and the third flow channel 322 are closed, the piston rod 210 vibrates upward, the pressure of the recovery chamber 112 increases, and the fluid flows from the recovery chamber 112 and the liquid storage cylinder into the compression chamber 111;

[0493] In the first stage, the overflow valve body 310 abuts against the overflow valve plate 330, and the overflow valve plate 330 abuts against the overflow valve seat 320. At this time, the second flow channel 311 and the third flow channel 322 are closed, and the fluid in the recovery chamber 112 flows from the overflow channel 370 to the compression chamber 111. The fluid flow is small, the damping is large, and the shock absorber 1 behaves as "hard";

[0494] In the second stage, the fluid in the recovery chamber 112 flows into the first chamber 241 through the fourth flow channel 243, and the pressure in the first chamber 241 increases. The fluid overcomes the electromagnetic force to push the pilot valve 600 and flows into the second chamber 242, and then flows into the compression chamber 111 through the second flow channel 315 and the first flow channel 321 of the valve body, and the damping is reduced.

[0495] In the third stage, a large amount of fluid is accumulated between the overflow valve plate 330 and the overflow valve body 310. When the pressure is greater than the electromagnetic force, the fluid pushes the overflow valve body 310 open, and the fluid flows out from between the overflow valve body 310 and the overflow valve plate 330, that is, the fluid in the recovery chamber 112 flows into the compression chamber 111 through the second flow channel 311 and the first flow channel 321, and the damping is further reduced.

[0496] 2. Figure 5 As shown, when the flow regulating valve 300 is in the valve closing state and the shock absorber 1 is in the compression condition, the valve body 230 is pushed by the magnetic force to push the pilot valve 600 and the overflow valve body 310, the overflow valve plate 330 abuts against the overflow valve seat 320, the second flow channel 311 and the third flow channel 322 are closed, the piston rod 210 vibrates downward, the pressure of the compression chamber 111 increases, and the fluid flows from the compression chamber 111 into the recovery chamber 112 and the liquid storage chamber 121;

[0497] In the first stage, the overflow valve body 310 abuts against the overflow valve plate 330, and the overflow valve plate 330 abuts against the overflow valve seat 320. At this time, the second flow channel 311 and the third flow channel 322 are closed, and the fluid in the compression chamber 111 flows from the overflow channel 370 to the recovery chamber 112. The fluid flow is small, the damping is large, and the shock absorber 1 behaves as "hard".

[0498] In the second stage, a large amount of fluid is accumulated in the first flow channel 321. When the pressure is greater than the electromagnetic force, the flow can push open the overflow valve plate 330 and the overflow valve body 310, and the fluid flows out from between the overflow valve seat 320 and the overflow valve plate 330, that is, the flow in the compression chamber 111 flows into the recovery chamber 112 through the first flow channel 321 and the third flow channel 322, and the damping is reduced.

[0499] 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 flow regulating valve 300 can utilize the valve body elastic member 360 to push the overflow valve seat 320 and the overflow valve body 310 to separate, so as to facilitate opening the flow regulating valve 300, and further facilitate adjusting the damping force of the shock absorber 1.

[0500] The flow regulating valve 300 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 herein.

[0501] In the description of this specification, the description with reference to the terms "specific embodiment", "specific example", etc. 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 representation of the above terms does not necessarily refer to the same embodiment or example.

[0502] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A flow control valve (300) for a shock absorber, characterized in that: include: Overflow valve seat (320); A relief valve body (310), wherein the relief valve body (310) is movably disposed on one side of the relief valve seat (320), and a support column (340) is disposed on one of the relief valve seat (320) and the relief valve body (310); A valve body elastic member (360), wherein the valve body elastic member (360) is disposed between the other of the overflow valve seat (320) and the overflow valve body (310) and the support column (340).

2. The flow control valve (300) for a shock absorber according to claim 1, characterized in that: The overflow valve body (310) is provided with the support column (340), and one end of the support column (340) facing the overflow valve seat (320) is configured with a support ring platform (341), and the valve body elastic member (360) abuts against the support ring platform (341); or, The overflow valve seat (320) is provided with the support column (340), and one end of the support column (340) facing the overflow valve body (310) is configured with a support ring platform (341), and the valve body elastic member (360) abuts against the support ring platform (341).

3. The flow control valve (300) for a shock absorber according to claim 2, characterized in that: The support ring (341) comprises: A connecting section (342), the connecting section (342) being connected to the supporting column (340); a transition section (343), the transition section (343) being connected to an end of the connecting section (342) facing away from the support column (340), and the outer diameter of the transition section (343) being smaller than the outer diameter of the connecting section (342); The valve body elastic member (360) is sleeved on the support ring platform (341) and is interference fit with the connecting section (342), and a gap exists between the valve body elastic member (360) and the transition section (343).

4. The flow control valve (300) for a shock absorber according to claim 1, characterized in that: The diameter of the support column (340) is R, and R satisfies: 1mm<R<7mm.

5. The flow control valve (300) for a shock absorber according to claim 1, characterized in that: Also includes: The overflow valve plate (330) is movably disposed between the overflow valve body (310) and the overflow valve seat (320) and sleeved on the support column (340) so as to move along the axial direction of the overflow valve seat (320) under the guidance of the support column (340).

6. The flow control valve (300) for a shock absorber according to claim 5, characterized in that: The overflow valve seat (320) is configured with a first flow channel (321), wherein the first flow channel (321) is suitable for communicating with the compression chamber (111) of the shock absorber (1); The overflow valve plate (330) is configured with an overflow channel (370), and when the overflow valve seat (320) and the overflow valve body (310) are respectively in contact with the overflow valve plate (330), the overflow channel (370) is respectively connected to the first flow channel (321) and the recovery chamber (112) of the shock absorber (1).

7. The flow control valve (300) for a shock absorber according to claim 6, characterized in that: A valve body abutting ring platform (312) is provided on the side of the overflow valve body (310) facing the overflow valve plate (330), and a valve seat abutting ring platform (325) is provided on the side of the overflow valve seat (320) facing the overflow valve plate (330), and the valve body abutting ring platform (312) and the valve seat abutting ring platform (325) are alternately arranged in the radial direction of the flow control valve (300); Wherein, along the radial direction of the overflow valve plate (330), at least a portion of the overflow channel (370) is located between the valve body abutting ring platform (312) and the valve seat abutting ring platform (325).

8. The flow control valve (300) for a shock absorber according to claim 7, characterized in that: The outer diameter of the valve body abutting ring platform (312) is smaller than the inner diameter of the valve seat abutting ring platform (325), and at least a portion of the overflow channel (370) is located between the outer peripheral surface of the valve body abutting ring platform (312) and the inner peripheral surface of the valve seat abutting ring platform (325).

9. The flow control valve (300) for a shock absorber according to claim 8, characterized in that: A valve body abutting surface (335) is formed on one side of the overflow valve plate (330) facing the overflow valve body (310), the valve body abutting surface (335) is suitable for abutting against the valve body abutting ring platform (312), and a valve body pressure-bearing surface (336) is formed between the valve body abutting surface (335) and the outer peripheral edge of the overflow valve plate (330); or The overflow channel (370) is configured as an overflow hole (339), the overflow hole (339) penetrates the overflow valve plate (330) along the thickness direction of the overflow valve plate (330), and the overflow hole (339) is located between the outer peripheral surface of the valve body abutting the ring platform (312) and the inner peripheral surface of the valve seat abutting the ring platform (325); or The overflow channel (370) is constructed as a first overflow notch (371), one end of the first overflow notch (371) at least extends to between the outer peripheral surface of the valve body abutting ring platform (312) and the inner peripheral surface of the valve seat abutting ring platform (325), and the other end of the first overflow notch (371) extends along the radial direction of the overflow valve plate (330) toward the outer peripheral edge of the overflow valve plate (330).

10. The flow control valve (300) for a shock absorber according to claim 7, characterized in that: A second overflow notch is provided on the side of the valve body abutting the ring platform (312) facing the overflow valve plate (330), and the second overflow notch is communicated with the first flow channel (321) and the recovery chamber (112); and / or, A third overflow notch (313) is provided on the side of the valve seat abutting ring platform (325) facing the overflow valve plate (330), and the third overflow notch (313) is communicated with the first flow channel (321) and the recovery chamber (112).

11. The flow control valve (300) for a shock absorber according to claim 5, characterized in that: The overflow valve plate comprises: A main body (332); A guide portion (333), the guide portion (333) is connected to the main body (332) and protrudes from at least one side of the main body (332) in the thickness direction, the guide portion (333) and the main body (332) jointly define a guide hole (334), and the overflow valve plate (330) is suitable for being movably sleeved on the supporting column (340) through the guide hole (334), so that the overflow valve plate (330) moves along the axial direction of the shock absorber (1) under the guidance of the supporting column (340).

12. The flow control valve (300) for a shock absorber according to claim 11, characterized in that: Along the axial direction of the overflow valve plate (330), the length of the guide portion (333) is L, and the thickness of the main body portion (332) is W; Wherein, L and W satisfy L>2D; and / or The support column (340) is clearance-matched with the guide hole (334), and the distance between the outer peripheral surface of the support column (340) and the inner side wall of the guide hole (334) is D, and D satisfies 0.02 mm≤D≤0.15 mm.

13. The flow control valve (300) for a shock absorber according to claim 11, characterized in that: The guide portion (333) is disposed on one side of the main body portion (332) in the thickness direction; or There are multiple guide parts (333), and the multiple guide parts (333) include a first guide part and a second guide part, the first guide part is arranged on one side of the thickness direction of the main body (332), and the second guide part is arranged on the other side of the thickness direction of the main body (332).

14. The flow control valve (300) for a shock absorber according to claim 5, characterized in that: Also includes: A magnetic attraction member (350), wherein the magnetic attraction member (350) is disposed on the overflow valve seat (320), and the magnetic attraction member (350) generates a magnetic attraction force for attracting the overflow valve plate (330); A magnetic force adjustment member (352), the magnetic force adjustment member (352) being arranged on one side of the magnetic attraction member (350), the magnetic force adjustment member (352) being used to adjust the magnetic attraction force of the magnetic attraction member (350) on the overflow valve plate (330).

15. The flow control valve (300) for a shock absorber according to claim 14, characterized in that: The magnetic force adjustment member (352) is arranged on a side of the magnetic attraction member (350) facing the overflow valve plate (330), and the magnetic force adjustment member (352) is used to block the magnetic attraction force of the magnetic attraction member (350) on the overflow valve plate (330) so as to adjust the magnetic attraction force of the magnetic attraction member (350) on the overflow valve plate (330); or The magnetic force adjustment member (352) is disposed between the magnetic attraction member (350) and the overflow valve seat (320), and the magnetic force adjustment member (352) is used to adjust the minimum distance between the magnetic attraction member (350) and the overflow valve plate (330), so as to adjust the magnetic attraction force of the magnetic attraction member (350) on the overflow valve plate (330); or The magnetic force adjustment member (352) comprises at least one magnetic force adjustment sheet (351), at least one magnetic force adjustment sheet (351) is stacked, and the magnetic force adjustment sheet (351) adjusts the magnetic attraction of the magnetic attraction member (350) to the overflow valve sheet (330) by adjusting the number of the magnetic force adjustment sheets (351), there are a plurality of magnetic force adjustment sheets (351), and an adsorption gap is formed between two adjacent magnetic force adjustment sheets (351) or between the magnetic force adjustment sheet (351) and the magnetic attraction member (350); or The magnetic force adjustment member (352) comprises a magnetic force adjustment block, and the magnetic force adjustment block adjusts the magnetic attraction force of the magnetic attraction member (350) on the overflow valve plate (330) by adjusting its own height along the axial direction of the overflow valve seat (320). The magnetic force adjustment block is provided with an adsorption hole.

16. The flow control valve (300) for a shock absorber according to claim 14, characterized in that: The overflow valve seat (320) is configured with at least one flow channel hole (3241), the magnetic attraction component (350) is adjacent to the flow channel hole (3241), and the flow channel hole (3241) is configured as an arc-shaped flow channel hole extending around the magnetic attraction component (350).

17. The flow control valve (300) for a shock absorber according to claim 14, characterized in that: Also includes: a limiting member (380), the limiting member (380) being arranged on the supporting column (340) and located on a side of the magnetic member (350) adjacent to the overflow valve plate (330) so as to limit the magnetic member (350) and the overflow valve plate (330); Wherein, the support column (340) is formed with a slot (344), and the limiting member (380) is engaged with the slot (344).

18. The flow control valve (300) for a shock absorber according to claim 5, characterized in that: The overflow valve body (310) is provided with the support column (340), one end of the support column (340) facing the overflow valve seat (320) is configured as a guide section (345), and the cross-sectional area of ​​the guide section (345) decreases as the support column (340) approaches the overflow valve seat (320) in the axial direction; or, The overflow valve seat (320) is provided with the support column (340), and one end of the support column (340) facing the overflow valve body (310) is configured as a guide section (345), and the cross-sectional area of ​​the guide section (345) decreases as the support column (340) approaches the overflow valve body (310) along the axial direction of the support column (340).

19. The flow control valve (300) for a shock absorber according to claim 18, characterized in that: The overflow valve body (310) is provided with the support column (340), and the gap between the overflow valve plate (330) and the guide section (345) increases as the support column (340) approaches the overflow valve seat (320) in the axial direction; or, The overflow valve seat (320) is provided with the support column (340), and the gap between the overflow valve plate (330) and the guide section (345) increases as the support column (340) approaches the overflow valve body (310) in the axial direction.

20. The flow control valve (300) for a shock absorber according to claim 5, characterized in that: The overflow valve seat (320) comprises: A first seat body (323), wherein the overflow valve plate (330) is arranged between the first seat body (323) and the overflow valve body (310); a second seat body (324), the second seat body (324) being supported on a side of the first seat body (323) facing away from the overflow valve plate (330), and the second seat body (324) being suitable for being connected to the piston (200) of the shock absorber (1); Wherein, one of the first seat body (323) and the second seat body (324) constructs the support column (340).

21. The flow control valve (300) for a shock absorber according to claim 20, characterized in that: The first seat body (323) and the second seat body (324) jointly define a first flow channel (321), wherein the first flow channel (321) is suitable for communicating with the compression chamber (111) of the shock absorber (1); A second flow channel (311) is formed between the overflow valve plate (330) and the overflow valve body (310), and a third flow channel (322) is formed between the overflow valve plate (330) and the overflow valve seat (320), and the second flow channel (311) and the third flow channel (322) are respectively connected to the recovery chamber (112) of the shock absorber (1) and the first flow channel (321); The second flow channel (311) and / or the third flow channel (322) are opened and closed by the movement of the overflow valve body (310).

22. The flow control valve (300) for a shock absorber according to claim 21, characterized in that: The first seat body (323) is configured with a through hole (3231), the second seat body (324) is configured with at least one flow channel hole (3241), and the second seat body (324) is configured with the support column (340), and the support column (340) extends into the through hole (3231); Wherein, the through hole (3231) and the flow channel hole (3241) constitute the first flow channel (321); and / or The overflow valve plate (330) is configured with at least one communicating hole (331), and the second flow channel (311) is connected to the first flow channel (321) through the communicating hole (331).

23. The flow control valve (300) for a shock absorber according to claim 1, characterized in that: The overflow valve seat comprises: A valve seat abutting ring platform (325), wherein the valve seat abutting ring platform (325) is arranged on a side of the overflow valve seat (320) facing the overflow valve body (310); A valve seat guide surface (326), wherein the valve seat guide surface (326) is arranged on a side of the overflow valve seat (320) facing the overflow valve body (310), and the valve seat guide surface (326) is located radially outside the valve seat abutting ring platform (325).

24. The flow control valve (300) for a shock absorber according to claim 23, characterized in that: Along the radial direction of the overflow valve seat (320), the distance between any point of the valve seat guide surface (326) and the radial outer side of the valve seat abutting ring platform (325) is X; Along the axial direction of the overflow valve seat (320), the distance between any point of the valve seat guide surface (326) and one end of the valve seat abutting ring platform (325) facing the overflow valve body (310) is Y; X and Y satisfy: Y / X>0.5; and / or Along the radial direction of the overflow valve seat (320), the radial thickness of the valve seat abutting the ring platform (325) is T, and T satisfies: 0.15<T≤0.2mm; and / or The flow control valve (300) further comprises a relief valve plate (330), wherein the relief valve plate (330) is movably arranged between the relief valve body (310) and the relief valve seat (320), and the relief valve plate (330) abuts against the valve seat abutment ring (325); Wherein, along the radial outward direction of the overflow valve seat (320), the distance that the outer peripheral surface of the overflow valve plate (330) exceeds the outer peripheral surface of the valve seat abutting ring platform (325) is A, and A satisfies 0.15mm≤A≤0.5mm.

25. The flow control valve (300) for a shock absorber according to claim 23, characterized in that: The valve seat guide surface (326) comprises: a first step surface (328), the first step surface (328) being connected to the radial outer side of the valve seat abutting ring platform (325) and extending in the radial direction of the relief valve seat (320), and the valve seat abutting ring platform (325) exceeds the first step surface (328) in a direction approaching the relief valve body (310); a second step surface (329), the second step surface (329) being connected to the radially outer side of the first step surface (328) and extending in the radial direction of the relief valve seat (320), and the first step surface (328) extending beyond the second step surface (329) in a direction approaching the relief valve body (310); or The valve seat guide surface (326) comprises: a third step surface (3262), the third step surface (3262) being connected to the radial outer side of the valve seat abutting ring platform (325) and extending in the radial direction of the overflow valve seat (320), and the valve seat abutting ring platform (325) exceeds the third step surface (3262) in a direction approaching the overflow valve body (310); an inclined surface (3261), wherein the inclined surface (3261) is connected to the radial outer side of the third step surface (3262), and gradually moves away from the overflow valve body (310) along the radial direction outward of the overflow valve seat (320); or The valve seat guide surface (326) comprises an inclined surface (3261), the inclined surface (3261) is connected to the radial outer side of the valve seat abutting ring platform (325), and along the radial outward direction of the overflow valve seat (320), the inclined surface (3261) gradually moves away from the overflow valve body (310); Wherein, along the axial direction of the overflow valve seat (320) in the direction close to the overflow valve body (310), the valve seat abuts against the annular platform (325) beyond the end of the inclined surface (3261) adjacent to the overflow valve body (310); or The valve seat guide surface (326) comprises an inclined surface (3261), the inclined surface (3261) is connected to the radial outer side of the valve seat abutting ring platform (325), and along the radial outward direction of the overflow valve seat (320), the inclined surface (3261) gradually moves away from the overflow valve body (310); Wherein, along the axial direction of the overflow valve seat (320), one end of the inclined surface (3261) adjacent to the overflow valve body (310) is flush with one end of the valve seat abutting ring platform (325) facing the overflow valve body (310).

26. The flow control valve (300) for a shock absorber according to claim 25, characterized in that: Along the axial direction of the overflow valve seat (320) toward the overflow valve body (310), the dimension of the valve seat abutting ring platform (325) beyond the valve seat guide surface (326) at one end adjacent to the overflow valve body (310) is B, and B satisfies: 0.4mm≤B≤0.6mm.

27. The flow control valve (300) for a shock absorber according to claim 25, characterized in that: The angle between the inclined surface (3261) and the radial direction of the overflow valve seat (320) is β, and β satisfies: 35°≤β≤55°.

28. A vibration absorber (1), characterized in that: include: Cylinder (100); A piston (200), wherein the piston (200) is movably disposed on 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) according to any one of claims 1 to 27, wherein 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); A control valve (400) is provided on the piston (200), the control valve (400) comprises a valve core assembly (500) and a pilot valve (600), 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).

29. The vibration absorber (1) according to claim 28, characterized in that The pilot valve (600) comprises: A base (630), one side of the base (630) being connected to the valve core assembly (500); a pilot valve plug (640), the pilot valve plug (640) being disposed 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), wherein the pilot valve elastic member (650) is disposed 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).

30. The vibration absorber (1) according to claim 29, characterized in that The pilot valve elastic member (650) comprises: An outer ring body (651), the outer ring body (651) abuts 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); There are multiple inner elastic arms (652), which are spaced apart along the circumference of the outer ring body (651), and the width of the inner elastic arms (652) decreases in the radial inward direction along the outer ring body (651).

31. The vibration absorber (1) according to claim 29, 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 pilot valve elastic member (650) provides an elastic force of 10N to 50N to the pilot valve plug (640).

32. The vibration absorber (1) according to claim 29, characterized in that The base (630) comprises: A base body portion (631), wherein the base body portion (631) is suitable for connecting with the valve core assembly (500); The base guide portion (632) extends along the circumferential direction 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).

33. The vibration absorber (1) according to claim 32, characterized in that The base flow 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 flow guide portion (632).

34. The vibration absorber (1) according to claim 32, characterized in that The base flow 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); 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).

35. The vibration absorber (1) according to claim 34, characterized in that The base guide portion (632) comprises: A first flow guide section (6321), one end of the first flow guide section (6321) being connected to the base body (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); Wherein, 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); and / or The stop structure (633) is constructed as a stop rib that extends obliquely toward the central axis of the base body (631) relative to the base guide portion (632), and the stop rib is formed by bending a portion of the base guide portion (632), and a notch (635) is formed at a position corresponding to the portion of the base guide portion (632).

36. The vibration absorber (1) according to claim 32, 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 (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) is in abutment with the base abutment platform (636).

37. The vibration absorber (1) according to claim 32, characterized in that The base body portion (631) is provided with a base balancing hole (634), and the base balancing holes (634) are multiple, and the multiple base balancing holes (634) are distributed at intervals in the circumferential direction of the base body portion (631).

38. The vibration absorber (1) according to claim 29, 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; A plug head (643), wherein the plug head (643) is arranged at a middle portion of a side of the plug sheet (641) facing away from the pilot valve elastic member (650).

39. The vibration absorber (1) according to claim 28, characterized in that The pilot valve (600) comprises: A main body (610), the main body (610) being connected to the valve core assembly (500), and the main body (610) being matched with the flow regulating valve (300); A flow guide portion (620), wherein the flow guide portion (620) extends along the circumferential direction of the main body portion (610), and the flow guide portion (620) extends from the outer peripheral edge of the main body portion (610) to a side close to the flow control valve (300).

40. The vibration absorber (1) according to claim 39, characterized in that The main body (610) is provided with a sealing protrusion (612), the sealing protrusion (612) protrudes from a side of the main body (610) facing the flow regulating valve (300), and the sealing protrusion (612) cooperates with the flow regulating valve (300).

41. The vibration absorber (1) according to claim 40, characterized in that The main body (610) is further provided with a main body balancing hole (611), the main body balancing hole (611) penetrates the main body (610) along the axial direction of the pilot valve (600), and along the radial direction of the main body (610), the main body balancing hole (611) is located between the guide portion (620) and the sealing protrusion (612); There are a plurality of the body balancing holes (611), and the plurality of the body balancing holes (611) are arranged at intervals along the circumference of the body portion (610); and / or Along the axial direction of the pilot valve (600), the sealing protrusion (612) protrudes from the flow guide portion (620); and / or A body flow guiding surface (613) is formed between the sealing protrusion (612) and the flow guiding portion (620) on a side surface of the body portion (610) facing the flow regulating valve (300); Wherein, along the axial direction of the pilot valve (600) extending in a direction away from the main body (610), the main body guide surface (613) is constructed as a truncated conical surface with a decreasing cross-sectional area.

42. The vibration absorber (1) according to claim 40, characterized in that The overflow valve body (310) is provided with a first flow channel (314) and a second flow channel (315) of the valve body, the first flow channel (314) of the valve body is in communication with the recovery chamber (112), and the second flow channel (315) of the valve body is in communication with the compression chamber (111), and the sealing protrusion (612) is matched with the first flow channel (314) of the valve body to control the opening and closing of the first flow channel (314) and the second flow channel (315) of the valve body; The inner diameter of the end of the first flow channel (314) of the valve body facing the pilot valve (600) is d1, and the inner diameter of the flow guide portion (620) is d2; The included angle between the radial outer side of the sealing protrusion (612) and the axial direction of the pilot valve (600) is α; Along the axial direction of the pilot valve (600), the length of the flow guide portion (620) exceeding the main body portion (610) in a direction close to the relief valve body (310) is h; h, d1, d2 and α satisfy:

43. The vibration absorber (1) according to claim 42, characterized in that The projection of the main body (610) on the overflow valve body (310) along the axial direction of the cylinder (100) covers at least part of the second flow channel (315) of the valve body.

44. The vibration absorber (1) according to claim 28, characterized in that The valve core assembly comprises: a valve core (520), the valve core (520) being movably disposed in the piston (200) of the shock absorber (1); a static iron core (430), the static iron core (430) being arranged on a side of the valve core (520) facing the flow control valve (300), and a sink groove (432) being arranged on a side of the static iron core (430) facing the valve core (520); When the flow regulating valve (300) is in an open valve state at the initial position, along the axial direction of the valve core assembly (500), the side of the valve core (520) facing the static iron core (430) is located in the sink groove (432), and along the axial direction of the valve core assembly (500), the distance between the side of the valve core (520) facing the static iron core (430) and the bottom wall of the sink groove (432) is L2, and L2 satisfies: 2mm>L2>0.7mm.

45. The vibration absorber (1) according to claim 44, characterized in that When the flow control valve (300) is in an open valve state at the initial position, along the axial direction of the valve core assembly (500), the distance between the side of the valve core (520) facing the static iron core (430) and the notch of the sink groove (432) is L1, and L1 satisfies: 0.5mm>L1>0.1mm.

46. ​​The vibration absorber (1) according to claim 45, characterized in that The outer diameter of the valve core (520) is D1, the inner diameter of the sink groove (432) is D2, and the depth of the sink groove (432) is L; Wherein, when the valve core (520) moves in a direction close to the static iron core (430), the distance between the inner wall of the sink groove (432) and the outer peripheral wall of the valve core (520) remains unchanged, so that (D2-D1)×L remains unchanged; or, When the valve core (520) moves toward the static iron core (430), the distance between the inner wall of the sink groove (432) and the outer peripheral wall of the valve core (520) gradually increases, so that (D2-D1)×L gradually increases.

47. The vibration absorber (1) according to claim 44, characterized in that The valve core assembly (500) further includes: A coil assembly (410), wherein the coil assembly (410) is disposed in the piston (200), and when the coil assembly (410) is energized, the valve core (520) generates magnetism and attracts the static iron core (430); A guide rod (530), wherein the guide rod (530) is movably inserted into the static iron core (430), and the guide rod (530) is inserted into the valve core (520) and connected to the valve core (520).

48. The vibration absorber (1) according to claim 47, characterized in that The valve core assembly (500) further includes: A first valve core elastic member (540) and a second valve core elastic member (550), wherein the first valve core elastic member (540) and the second valve core elastic member (550) are sleeved on the guide rod (530) and are respectively arranged on both sides of the moving direction of the valve core (520), and the first valve core elastic member (540) and the second valve core elastic member (550) jointly apply elastic force to the valve core (520) to keep the position of the valve core (520) stable.

49. The vibration absorber (1) according to claim 48, characterized in that The valve core (520) is provided with a first groove (522) and a second groove (523) at two axial ends thereof; the first valve core elastic member (540) is arranged in the first groove (522) and abuts against the groove bottom of the first groove (522) and the iron core cover (510) of the shock absorber (1); the second valve core elastic member (550) is arranged in the second groove (523) and abuts against the groove bottom of the second groove (523) and the static iron core (430).

50. The vibration absorber (1) according to claim 44, characterized in that The valve core (520) is provided with a valve core balancing flow channel (521), and the valve core balancing flow channel (521) penetrates the opposite sides of the valve core (520) along the axial direction of the valve core (520).

51. The vibration absorber (1) according to claim 28, characterized in that The piston (200) comprises: A piston rod (210); A piston valve assembly (220), wherein the piston valve assembly (220) separates the compression chamber (111) and the recovery chamber (112) in the cylinder (100); The valve body (230) is connected to the piston valve assembly (220) and the piston rod (210) through the valve body (230), the flow regulating valve (300) is installed in the valve body (230), and the control valve (400) extends into the valve body (230) and cooperates with the flow regulating valve (300).

52. The vibration absorber (1) according to claim 51, characterized in that The flow regulating valve (300) comprises a relief valve plate (330), the relief valve body (310) is movably arranged in the piston (200), and the relief valve plate (330) is movably arranged between the relief valve seat (320) and the relief valve body (310); The valve body (230) is provided with a sealing ring platform (244), and the end of the overflow valve body (310) facing away from the overflow valve seat (320) is provided with a sealing recessed groove (316), and the sealing ring platform (244) extends into the sealing recessed groove (316) and cooperates with the sealing recessed groove (316) in a dynamic seal; and A valve seat abutting ring platform (325) is provided on the side of the overflow valve seat (320) facing the overflow valve plate (330), the valve seat abutting ring platform (325) abuts against the overflow valve plate (330), and the inner diameter of the valve seat abutting ring platform (325) is larger than the inner diameter of the sealing groove (316).

53. The vibration absorber (1) according to claim 52, characterized in that The inner cross-sectional area of ​​the valve seat abutting ring platform (325) is S1, the inner cross-sectional area of ​​the sealing recess (316) is S2, and S1 and S2 satisfy: 1.05×S2≤S1≤1.3×S2; and / or Along the radial direction of the shock absorber (1), the sealing ring platform (244) and the inner wall of the valve body (230) are spaced apart, the overflow valve body (310) is dynamically sealed with the inner wall of the valve body (230), and the sealing groove (316) is dynamically sealed with the outer wall of the sealing ring platform (244).

54. The vibration absorber (1) according to claim 52, characterized in that The overflow valve body (310) is movably arranged in the valve body (230), the outer wall of the overflow valve body (310), the inner wall of the valve body (230) and the outer wall of the sealing ring platform (244) define a first chamber (241), and the sealing groove (316) and the inner wall of the sealing ring platform (244) define a second chamber (242), and the control valve (400) extends into the second chamber (242) to control the opening and closing of the first chamber (241) and the second chamber (242).

55. The vibration absorber (1) according to claim 54, characterized in that The overflow valve seat (320) is provided with a first flow channel (321), a second flow channel (311) is formed between the overflow valve plate (330) and the overflow valve body (310), and a third flow channel (322) is formed between the overflow valve plate (330) and the overflow valve seat (320); The side wall of the valve body (230) is provided with a fourth flow channel (243) and a fifth flow channel (251), the fourth flow channel (243) is communicated with the first chamber (241) and the recovery chamber (112) respectively, one end of the fifth flow channel (251) is communicated with the recovery chamber (112), and the other end is communicated with the second flow channel (311) and the third flow channel (322) respectively; and, The overflow valve body (310) is constructed with a first flow channel (314) and a second flow channel (315) of the valve body. One end of the first flow channel (314) of the valve body is connected to the first chamber (241), and the other end of the first flow channel (314) of the valve body is connected to the second chamber (242). The control valve (400) is matched with the other end of the first flow channel (314) of the valve body. One end of the second flow channel (315) of the valve body facing away from the overflow valve seat (320) is connected to the second chamber (242), and the other end of the second flow channel (315) of the valve body is connected to the first flow channel (321). The fluid flow of the first flow channel (314) of the valve body and the fluid flow of the second flow channel (315) of the valve body are controlled by the opening and closing of the control valve (400).

56. The vibration absorber (1) according to claim 55, characterized in that The valve body (230) comprises: an upper valve body (240), the upper valve body (240) being connected to the piston rod (210), the overflow valve body (310) being movably disposed in the upper valve body (240), the upper valve body (240) being provided with the sealing ring platform (244), and the overflow valve body (310) and the upper valve body (240) defining the first chamber (241) and the second chamber (242); a lower valve body (250), the lower valve body (250) being connected between the piston valve assembly (220) and the upper valve body (240), and the overflow valve seat (320) being disposed in the lower valve body (250); Wherein, the side wall of the upper valve body (240) is provided with the fourth flow channel (243), and the side wall of the lower valve body (250) is provided with the fifth flow channel (251).

57. The vibration absorber (1) according to claim 51, characterized in that The control valve (400) further comprises: An iron core cover (510), wherein the iron core cover (510) is fixed inside the piston rod (210); A magnetic isolating ring (420), wherein the magnetic isolating ring (420) is installed in the piston rod (210), and the magnetic isolating ring (420) is located between the core cover (510) and the valve body (230) and separates the coil assembly (410) of the valve core assembly (500) and the valve body (230).

58. The vibration absorber (1) according to claim 57, characterized in that The top of the core cover (510) is provided with a mounting recess (511), a second guide sleeve (512) is provided in the mounting recess (511), and the guide rod (530) of the valve core assembly (500) is passed through the second guide sleeve (512).

59. The vibration absorber (1) according to claim 57, characterized in that The inner circumference of the core cover (510) is provided with a first step portion (513), and the outer circumference of the valve core (520) is provided with a second step portion (524), and the first step portion (513) is stopped at a side of the second step portion (524) facing the core cover (510).

60. A vehicle, characterized in that: Comprising a vibration absorber (1) according to any one of claims 28-59.

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