Valve element assembly of shock absorber, shock absorber and vehicle

Abstract

The invention discloses a valve element assembly for a shock absorber, the shock absorber and a vehicle, and the valve element assembly comprises a valve element, a valve element, a valve rod and a valve rod, the static iron core is arranged on the side, facing a flow regulating valve of the shock absorber, of the valve element, and a sinking groove is formed in the side, facing the valve element, of the static iron core; when the flow regulating valve is in a valve opening state at the initial position, the side, facing the static iron core, of the valve element is located in the sinking groove in the axial direction of the valve element assembly, and the distance between the side, facing the static iron core, of the valve element and the bottom wall of the sinking groove in the axial direction of the valve element assembly is L2, l2 meets the condition that L2 is greater than 0.7 mm and greater than 2mm. The electromagnetic force of the valve element of the valve element assembly can be kept constant when the valve element moves in the axial direction of the valve element, so that it is guaranteed that the axial stress of the valve element in the moving process can be kept stable, and then the stability of the damping force of the shock absorber can be improved.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS 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

[0002] The invention relates to the technical field of vehicles, and in particular to a valve core component of a shock absorber, a shock absorber and a vehicle. Background Art

[0003] The shock absorber in the related art is usually provided with a valve core assembly and a piston, wherein the valve core assembly includes a valve core, and the valve core is movably arranged in the piston, and when the valve core moves along the axial direction of the shock absorber, the valve core is subjected to electromagnetic force. However, when the valve core in the related art moves along the axial direction of the shock absorber, the magnetic resistance ratio in the axial direction will change, thereby causing the electromagnetic force exerted on the valve core to change, and the linearity of the damping force change of the shock absorber is poor, which is not convenient for adjusting the damping force of the shock absorber. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the present invention is to provide a valve core assembly of a shock absorber, wherein the electromagnetic force of the valve core of the valve core assembly can be kept constant when the valve core moves along its axial direction, so as to ensure that the axial force of the valve core during the movement can be maintained stable, thereby improving the stability of the damping force of the shock absorber.

[0005] The invention also provides a shock absorber having the valve core assembly.

[0006] The present invention also provides a vehicle having the shock absorber.

[0007] In order to achieve the above-mentioned purpose, according to a first aspect of the present invention, a valve core assembly for a shock absorber is proposed, comprising: a valve core, which is movably arranged in the piston of the shock absorber; a static iron core, which is arranged on the side of the valve core facing the flow regulating valve of the shock absorber, 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 the 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.

[0008] According to the embodiment of the present invention, the electromagnetic force of the valve core of the valve core assembly can be kept constant when the valve core moves along its axial direction, so as to ensure that the axial force of the valve core can be kept stable during the movement, thereby improving the stability of the damping force of the shock absorber.

[0009] 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.

[0010] 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.

[0011] According to some embodiments of the present invention, the valve core assembly for the shock absorber also includes: a coil assembly, wherein the coil assembly 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, wherein the guide rod is movably penetrated through the static iron core, and the guide rod is penetrated through the valve core and connected to the valve core.

[0012] According to some embodiments of the present invention, the valve core assembly for the shock absorber 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, 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.

[0013] 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.

[0014] According to some embodiments of the present invention, the static iron core is provided with a through hole, a first guide sleeve is provided in the through hole, and the guide rod passes through the first guide sleeve.

[0015] 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.

[0016] According to a second aspect of the present invention, a shock absorber is provided, the shock absorber comprising: a cylinder; a piston, the piston is movably arranged on the cylinder, and the piston separates a compression chamber and a recovery chamber in the cylinder; a flow regulating valve, 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 comprising the valve core assembly and the pilot valve according to the first aspect of the present invention, the valve core assembly is arranged on the piston, the pilot valve is connected to the valve core assembly, and the valve core assembly controls the flow regulating valve through the pilot valve to adjust the fluid flow between the compression chamber and the recovery chamber.

[0017] According to the shock absorber described in the second aspect embodiment of the present invention, by utilizing the valve core assembly described in the first aspect embodiment of the present invention, the electromagnetic force of the valve core of the valve core assembly can be kept constant when the valve core moves along its axial direction, so as to ensure that the axial force of the valve core can be maintained stable during the movement, thereby improving the stability of the damping force of the shock absorber.

[0018] According to some embodiments of the present invention, the piston includes: a piston rod; a piston valve assembly, the piston valve assembly separates the compression chamber and the recovery chamber in the cylinder; a valve body, the piston valve assembly and the piston rod are connected through the valve body, the flow regulating valve is installed in the valve body, and the pilot valve extends into the valve body and cooperates with the flow regulating valve.

[0019] 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.

[0020] 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.

[0021] 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 away from the static core.

[0022] 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.

[0023] 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 electromagnetic force of the valve core of the valve core assembly can be kept constant when the valve core moves along its axial direction, so as to ensure that the axial force of the valve core can be maintained stable during the movement, thereby improving the stability of the damping force of the shock absorber.

[0024] 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

[0025] 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: Figure 1 is a schematic structural diagram of a shock absorber according to an embodiment of the present invention; Figure 2 is a structural schematic diagram of a flow control valve according to an embodiment of the present invention, when the initial position is in an open valve state and the working condition is restored; Figure 3 is a structural schematic diagram of a compression condition when the flow control valve according to an embodiment of the present invention is in an open valve state at an initial position; Figure 4 It is a structural schematic diagram of the flow control valve according to an embodiment of the present invention, when the initial position is in a closed valve state and the working condition is restored; Figure 5 is a structural schematic diagram of a compression condition when the flow control valve according to an embodiment of the present invention is in a closed valve state at an initial position; Figure 6 is a schematic structural diagram of a valve core assembly according to an embodiment of the present invention.

[0026] Reference numerals: 1. Shock absorber; 100, cylinder; 110, inner cylinder; 111, compression chamber; 112, recovery chamber; 120, outer cylinder; 121, liquid storage chamber; 130, bottom valve assembly; 200, piston; 210, piston rod; 220, piston valve assembly; 230, valve body; 300, flow control valve; 400, control valve; 410, coil assembly; 420, magnetic isolation ring; 430, static iron core; 432, sink; 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; 600. Pilot valve. DETAILED DESCRIPTION

[0027] 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.

[0028] 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.

[0029] In the description of the present invention, "first feature" or "second feature" may include one or more of the features.

[0030] In the description of the present invention, "plurality" means two or more than two, and "several" means one or more.

[0031] A vibration absorber 1 according to an embodiment of the present invention will be described below with reference to the drawings.

[0032] 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 .

[0033] 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.

[0034] The compression chamber 111 and the recovery chamber 112 may store fluid, such as fluid with a certain pressure and inert gas.

[0035] 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.

[0036] 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.

[0037] 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.

[0038] 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.

[0039] 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 .

[0040] 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.

[0041] 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.

[0042] 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.

[0043] The valve core assembly 500 according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0044] like Figure 1-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 .

[0045] 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 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.

[0046] In the present invention, the flow control valve 300 is in an open valve state at the initial position, which means that the flow control valve 300 is in an open initial state when there is no external pressure squeezing the flow control valve 300 and no fluid flows in the flow control valve 300. Also, the flow control valve 300 is in a closed valve state at the initial position, which means that the flow control valve 300 is squeezed by an external force, and the overflow valve seat 320 and the overflow valve body 310 of the flow control valve 300 are in abutment and closed initial state.

[0047] For example, in some embodiments, when the valve core assembly 500 is energized, it squeezes the flow regulating valve 300. At this time, the flow regulating valve 300 is in an open valve state at the initial position, which means that the valve core assembly 500 is not energized and there is no fluid flowing in the flow regulating valve 300, and the flow regulating valve 300 is in an open initial state. At this time, the flow regulating valve 300 is in a balanced state; and, the flow regulating valve 300 is in a closed valve state at the initial position, which means that the valve core assembly 500 is energized and the overflow valve seat 320 and the overflow valve body 310 of the flow regulating valve 300 are in abutment and closed initial state.

[0048] Alternatively, in other embodiments, the flow regulating valve 300 will be squeezed when the valve core assembly 500 is not energized. At this time, the flow regulating valve 300 is in an open valve state at the initial position, which means that the valve core assembly 500 is energized and there is no fluid flowing in the flow regulating valve 300, and the flow regulating valve 300 is in an open initial state. At this time, the flow regulating valve 300 is in a balanced state; and, the flow regulating valve 300 is in a closed valve state at the initial position, which means that the valve core assembly 500 is not energized and the overflow valve seat 320 and the overflow valve body 310 of the flow regulating valve 300 are in an abutment and closed initial state.

[0049] 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).

[0050] 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.

[0051] Therefore, when the flow regulating valve 300 is in an open valve state at the initial position, the side of the valve core 520 facing the static iron core 430 is arranged 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.

[0052] And, if Figure 6 As shown, when the flow control valve 300 is in the initial position and 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.

[0053] In this way, when the valve core 520 is in the initial position and in the valve open state, it can be far away from the bottom wall of the groove 432, 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.

[0054] 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.

[0055] In some embodiments of the present invention, Figure 6 As shown, when the flow control valve 300 is in the initial position and 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 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.

[0056] 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.

[0057] 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.

[0058] When the valve core 520 moves toward 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 toward 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.

[0059] 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.

[0060] 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 .

[0061] 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 .

[0062] 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.

[0063] 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.

[0064] 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 .

[0065] The valve core balancing channel 521 in the present invention is the eighth channel in the priority application.

[0066] 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.

[0067] 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 .

[0068] 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.

[0069] 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.

[0070] 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 .

[0071] 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 .

[0072] 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.

[0073] 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.

[0074] The first guide sleeve 531 in the present invention is the guide sleeve in the priority application.

[0075] A vibration absorber 1 according to an embodiment of the present invention will be described below with reference to the drawings.

[0076] like Figure 1-Figure 5 As shown, the shock absorber 1 includes a cylinder 100 , a piston 200 , a flow regulating valve 300 and a control valve 400 .

[0077] Specifically, 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 includes a valve core assembly 500 and a pilot valve 600 according to the above-mentioned embodiment of the present invention, the valve core assembly 500 is disposed on the piston 200, the pilot valve 600 is connected to the valve core assembly 500, and the valve core assembly 500 controls the flow regulating valve 300 through the pilot valve 600 to adjust the fluid flow between the compression chamber 111 and the recovery chamber 112.

[0078] According to the shock absorber 1 of the embodiment of the present invention, by utilizing the valve core assembly 500 according to the above-mentioned embodiment of the present invention, the electromagnetic force of the valve core 520 of the valve core assembly 500 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.

[0079] 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 .

[0080] 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.

[0081] 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 .

[0082] 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. 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 .

[0083] 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.

[0084] 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.

[0085] 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.

[0086] 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.

[0087] The second guide sleeve 512 in the present invention is the guide sleeve in the priority application.

[0088] In some embodiments of the present invention, Figure 6 As 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.

[0089] A vehicle according to an embodiment of the present invention will be described below with reference to the accompanying drawings. The vehicle includes the shock absorber 1 according to the above-described embodiment of the present invention.

[0090] 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 electromagnetic force of the valve core 520 of the valve core assembly 500 when it moves along its axial direction can be kept constant, 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.

[0091] The valve core assembly 500 of 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.

[0092] 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.

[0093] 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 valve core assembly (500) for a shock absorber, characterized in that: include: 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 regulating valve (300) of the shock absorber (1), 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.

2. The valve core assembly (500) for a shock absorber according to claim 1, 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.

3. The valve core assembly (500) for a shock absorber according to claim 1, 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 in a direction approaching 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.

4. The valve core assembly (500) for a shock absorber according to claim 1, characterized in that: Also 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), the guide rod (530) being movably disposed through the static iron core (430), the guide rod (530) being disposed through the valve core (520) and being connected to the valve core (520).

5. The valve core assembly (500) for a shock absorber according to claim 4, characterized in that: Also 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.

6. The valve core assembly (500) for a shock absorber according to claim 5, characterized in that: A first groove (522) and a second groove (523) are provided at two axial ends of the valve core (520); the first valve core elastic member (540) is provided in the first groove (522) and abuts against a groove bottom of the first groove (522) and an iron core cover (510) of the shock absorber (1); and the second valve core elastic member (550) is provided in the second groove (523) and abuts against a groove bottom of the second groove (523) and the static iron core (430).

7. The valve core assembly (500) for a shock absorber according to claim 4, characterized in that: The static iron core (430) is provided with a through hole, a first guide sleeve (531) is provided in the through hole, and the guide rod (530) passes through the first guide sleeve (531).

8. The valve core assembly (500) for a shock absorber according to claim 1, 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 two opposite sides of the valve core (520) along the axial direction of the valve core (520).

9. A shock absorber (1), characterized in that: include: Cylinder (100); A piston (200), the piston (200) being movably disposed on the cylinder (100), and the piston (200) separating a compression chamber (111) and a recovery chamber (112) in the cylinder (100); a flow regulating valve (300), the flow regulating valve (300) being arranged in the piston (200) and being respectively connected to the compression chamber (111) and the recovery chamber (112); A control valve (400), the control valve (400) comprising a valve core assembly (500) and a pilot valve (600) according to any one of claims 1 to 8, the valve core assembly (500) being arranged on the piston (200), the pilot valve (600) being connected to the valve core assembly (500), and the valve core assembly (500) controlling the flow regulating valve (300) through the pilot valve (600) to adjust the fluid flow between the compression chamber (111) and the recovery chamber (112).

10. The vibration absorber (1) according to claim 9, characterized in that The piston (200) comprises: 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 pilot valve (600) extends into the valve body (230) and cooperates with the flow regulating valve (300).

11. The vibration absorber (1) according to claim 10, characterized in that The control valve (400) further comprises: An iron core cover (510), the iron core cover (510) being fixed inside the piston rod (210); A magnetic isolation ring (420), the magnetic isolation ring (420) being installed in the piston rod (210), the magnetic isolation ring (420) being located between the iron core cover (510) and the valve body (230) and separating the coil assembly (410) of the valve core assembly (500) and the valve body (230).

12. The vibration absorber (1) according to claim 11, characterized in that A mounting recess (511) is provided on 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) passes through the second guide sleeve (512).

13. The vibration absorber (1) according to claim 11, characterized in that The inner circumference of the core cover (510) is provided with a first step portion (513), 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 away from the static core (430).

14. A vehicle, characterized in that: Comprising a vibration absorber (1) according to any one of claims 9 to 13.

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