Shock absorber piston, shock absorber and suspension system

Abstract

This invention discloses a damping piston, a damper, and a suspension system. The damping piston includes: a piston body having a mounting cavity; a movable member movably mounted within the mounting cavity and cooperating with the piston body to define a recovery channel and a compression channel, the recovery channel and the compression channel being located on opposite sides of the movable member; and a first fixed member mounted on the piston body. A thrust or pull force exists between the first fixed member and the movable member to move the movable member away from or towards the first fixed member, thereby adjusting the flow area of ​​the recovery channel and the compression channel. According to the embodiments of the present invention, the damping piston can generate different magnitudes of recovery damping force and compression damping force to meet the damping requirements under more operating conditions. Furthermore, the movable member and the first fixed member do not affect the appearance of the piston body, eliminating the need to change the appearance structure of the damping piston or the structure of other cooperating components on the damper, thus reducing production costs and ensuring the travel space of the damping piston.

Description

Technical Field

[0001] This invention relates to the field of vehicle technology, and more specifically, to a damping piston, a damper, and a suspension system. Background Technology

[0002] In related technologies, shock absorbers are passive dampers, generating damping through the combination of connecting rod and piston assembly, outer cylinder, bottom valve, and damping oil to provide the energy required for damping. However, shock absorbers with fixed structures can only provide a single and unique damping force, which cannot cope with the complex driving conditions of vehicles and the complex excitation of the ground, resulting in an inability to meet the high requirements for vehicle comfort and sport performance. Summary of the Invention

[0003] The present invention aims to at least solve one of the technical problems existing in the prior art. Therefore, one object of the present invention is to provide a damping piston for a vibration damper, which can adjust the damping force and occupies a small overall space.

[0004] Another object of the present invention is to provide a vibration damper having the above-described vibration damping piston.

[0005] Another object of the present invention is to provide a suspension system having the above-mentioned shock absorber.

[0006] According to an embodiment of the present invention, a damping piston of a damper includes: a piston body having a mounting cavity; a movable member movably mounted in the mounting cavity and cooperating with the piston body to define a recovery channel and a compression channel, the recovery channel and the compression channel being located on opposite sides of the movable member; and a first fixing member mounted on the piston body; wherein a thrust or pull force exists between the first fixing member and the movable member to move the movable member away from or towards the first fixing member to adjust the flow area of ​​the recovery channel and the compression channel.

[0007] According to an embodiment of the present invention, the damping piston of the damper is driven to move by the thrust or pull generated between the first fixed member and the moving member, so that the flow area of ​​the recovery channel and the compression channel can be adjusted, thereby forming different magnitudes of recovery damping force and compression damping force, meeting the damping requirements under more working conditions, improving the damping effect, and the setting of the moving member and the first fixed member has no impact on the appearance of the piston body, so that the appearance structure of the damping piston and the structure of other mating parts on the damper do not need to be changed, which is conducive to reducing production costs, simplifying the structure, and ensuring the movement space of the damping piston.

[0008] In addition, the damping piston of the damper according to the above embodiments of the present invention may also have the following additional technical features:

[0009] According to some embodiments of the present invention, the first fixing member is a magnetic member, the moving member includes an iron core and a winding, the winding is wound around the iron core, and there is a magnetic force between the first fixing member and the moving member when the winding is energized, the magnetic force forming the thrust or pull force.

[0010] According to some embodiments of the present invention, the first fixing member is disposed in one of the recovery channel and the compression channel, and the vibration damping piston further includes: a second fixing member, the second fixing member being disposed in the other of the recovery channel and the compression channel, the first fixing member and the second fixing member having opposite magnetic properties, and the magnetic forces between the first fixing member and the second fixing member and the moving member being unequal when the winding is energized.

[0011] According to some embodiments of the present invention, the first fixing member is disposed in one of the recovery channel and the compression channel, and the vibration damping piston further includes: a second fixing member, the second fixing member being disposed in the other of the recovery channel and the compression channel, the second fixing member being a magnetic member, and the first fixing member and the second fixing member having the same magnetism.

[0012] According to some embodiments of the present invention, the first fixing member is disposed in one of the recovery channel and the compression channel, and the vibration damping piston further includes: a second fixing member, the second fixing member being disposed in the other of the recovery channel and the compression channel, the moving member including a magnetic member, one of the first fixing member and the second fixing member including an iron core and a winding, the winding being wound around the iron core, and one of the first fixing member and the second fixing member having a magnetic force with the moving member when the winding is energized, the magnetic force forming the thrust or pull force.

[0013] According to some embodiments of the present invention, the first fixing member is disposed in one of the recovery channel and the compression channel, and the vibration damping piston further includes: a second fixing member, the second fixing member being disposed in the other of the recovery channel and the compression channel, the moving member including a magnetic member, the first fixing member and the second fixing member both including an iron core and a winding, the winding being wound around the iron core, the first fixing member and the second fixing member having opposite magnetic properties when the winding is energized and having unequal magnetic forces with the moving member.

[0014] According to some embodiments of the present invention, the first fixing member is disposed in one of the recovery channel and the compression channel, and the vibration damping piston further includes: a second fixing member, the second fixing member being disposed in the other of the recovery channel and the compression channel, the moving member including a magnetic member, both the first fixing member and the second fixing member including an iron core and a winding, the winding being wound around the iron core, and the first fixing member and the second fixing member having the same magnetism when the winding is energized.

[0015] According to some embodiments of the present invention, the iron core is provided with an annular groove, the axis of the annular groove is parallel to the moving direction of the moving member, and the winding is embedded in the annular groove.

[0016] According to some embodiments of the present invention, the piston body has an annular receiving cavity, one axial end of the piston body is provided with a first restoration hole and a first compression hole, the other axial end of the piston body is provided with an opening of the annular receiving cavity, and a plurality of fan-shaped partitions are provided in the annular receiving cavity, with the mounting cavity formed between two adjacent fan-shaped partitions.

[0017] According to some embodiments of the present invention, the vibration damping piston further includes an end cap that covers the open opening, and the end cap is provided with a second recovery hole coaxial with the first recovery hole on the piston body and a second compression hole coaxial with the first compression hole on the piston body. The first recovery hole and the second recovery hole are connected through the recovery channel, and the first compression hole and the second compression hole are connected through the compression channel.

[0018] According to some embodiments of the present invention, a spacer is provided between the first recovery hole and the first compression hole, and the radial dimension of the moving member is greater than the radial dimension of the spacer.

[0019] According to some embodiments of the present invention, the first fixing member is disposed in one of the recovery channel and the compression channel, and the vibration damping piston further includes: a second fixing member, the second fixing member being disposed in the other of the recovery channel and the compression channel; when the moving member abuts against the first fixing member, the moving member at least partially blocks the first recovery hole and at least partially opens the first compression hole; when the moving member abuts against the second fixing member, the moving member at least partially blocks the first compression hole and at least partially opens the first recovery hole.

[0020] According to some embodiments of the present invention, when the movable member abuts against the first fixed member, the movable member completely blocks the first recovery hole and completely opens the first compression hole; when the movable member abuts against the second fixed member, the movable member completely blocks the first compression hole and completely opens the first recovery hole.

[0021] According to some embodiments of the present invention, the mounting cavity is a radially elongated strip, and the planes containing the opposite sides of two adjacent sector-shaped partitions are parallel to each other.

[0022] According to some embodiments of the present invention, the piston body includes: an inner cylinder defining a mounting hole for mounting a connecting rod of the damper, the first fixing member being mounted on the inner cylinder; an outer cylinder surrounding the inner cylinder, the second fixing member of the damping piston being mounted on the outer cylinder, the movable member being movably disposed between the inner cylinder and the outer cylinder; and a connecting end wall connecting one axial end of the inner cylinder and one axial end of the outer cylinder, the connecting end wall having the first compression hole and the first recovery hole, the fan-shaped partition being located within the annular receiving cavity between the inner cylinder and the outer cylinder, and connected to the connecting end wall.

[0023] According to some embodiments of the present invention, the end cap includes an end cap wall and a peripheral wall, the end cap wall and the peripheral wall are connected axially at one end, the end cap wall seals the opening and is provided with a second compression hole and a second recovery hole, the peripheral wall is sleeved on the piston body, the vibration damping piston further includes a flexible member, the flexible member is sleeved at the connection between the peripheral wall and the piston body, the outer peripheral surface of the peripheral wall and the outer peripheral surface of the piston body are provided with grooves, and the flexible member is provided with protrusions that are embedded in the grooves.

[0024] According to some embodiments of the present invention, the vibration damping piston further includes a second fixing member, wherein the first fixing member is an annular structure and is disposed between the sector-shaped partition and the inner peripheral wall of the annular receiving cavity; and the second fixing member is an annular structure and is disposed between the sector-shaped partition and the outer peripheral wall of the annular receiving cavity.

[0025] According to some embodiments of the present invention, there are multiple movable members, which are arranged at intervals along the circumference of the piston body, and the mounting cavity is provided in a one-to-one correspondence with each movable member.

[0026] The vibration damper according to an embodiment of the present invention includes a cylinder, a connecting rod, and a vibration damping piston according to the embodiment of the present invention. The vibration damping piston is disposed inside the cylinder and is sealed to the inner circumferential surface of the cylinder. The vibration damping piston is connected to the connecting rod, and the connecting rod and the vibration damping piston are movable along the axial direction of the cylinder.

[0027] According to some embodiments of the present invention, the vibration damper further includes: a first one-way valve disposed in the recovery channel and used to make the recovery channel unidirectionally open; and a second one-way valve disposed in the compression channel and used to make the compression channel unidirectionally open, wherein the opening directions of the recovery channel and the compression channel are opposite.

[0028] The suspension system according to an embodiment of the present invention includes a shock absorber according to an embodiment of the present invention.

[0029] According to some embodiments of the present invention, the damping piston further includes a second fixing member, and at least one of the first fixing member, the second fixing member, and the moving member includes a winding. The suspension system further includes: a control component connected to the winding; and a detection component including at least one of a vibration acceleration sensor, a wheel angle sensor, a throttle opening sensor, a gyroscope sensor, and a wheel speed sensor. The detection component is connected to the control component, and the control component is used to control the energization state of the winding according to the detection result of the detection component.

[0030] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0031] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0032] Figure 1 This is a schematic diagram of a vibration damper according to an embodiment of the present invention;

[0033] Figure 2 This is a partial structural schematic diagram of a vibration damper according to an embodiment of the present invention;

[0034] Figure 3 This is a schematic diagram of the structure of the vibration-damping piston according to an embodiment of the present invention;

[0035] Figure 4 This is an exploded view of a portion of the structure of a vibration damper according to an embodiment of the present invention;

[0036] Figure 5 This is a top view of the piston body according to an embodiment of the present invention;

[0037] Figure 6 This is a bottom view of the end cap according to an embodiment of the present invention;

[0038] Figure 7 This is a schematic diagram of the adjustable damping range of a vibration damper according to an embodiment of the present invention, where V represents the speed of the vibration damper and F represents the damping force.

[0039] Figure 8 This is a damping schematic diagram of a shock absorber according to an embodiment of the present invention, wherein the moving part is located in the middle of the mounting cavity;

[0040] Figure 9 These are vibration damping diagrams of a vibration damper according to an embodiment of the present invention and a vibration damper in a comparative example;

[0041] Figure 10 This is a control schematic diagram of a suspension system according to an embodiment of the present invention;

[0042] Figure 11 This is a schematic diagram of a suspension system according to an embodiment of the present invention.

[0043] Figure label:

[0044] Suspension system 100; Control components 3; Vibration acceleration sensor 4; Wheel angle sensor 5; Throttle opening sensor 6; Gyroscope sensor 7; Wheel speed sensor 8;

[0045] Shock absorber 2; cylinder 210; connecting rod 220; guide sealing assembly 230; floating sealing piston 240;

[0046] Vibration damping piston 1;

[0047] Piston body 10; mounting cavity 101; compression channel 102; recovery channel 103; first compression hole 104a; second compression hole 104b; first recovery hole 105a; second recovery hole 105b; annular receiving cavity 111; fan-shaped partition 112; inner cylinder 113; outer cylinder 114; connecting end wall 115; spacer 116; end cap 12; cap end wall 121; cap peripheral wall 122;

[0048] Moving part 20; iron core 21; annular groove 201; winding 22;

[0049] First fastener 31; Second fastener 32;

[0050] Flexible component 40; First check valve 41; Second check valve 42;

[0051] Power cord 50;

[0052] First direction F1; Second direction F2. Detailed Implementation

[0053] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0054] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0055] In the description of this invention, "first feature" and "second feature" may include one or more of the features, "multiple" means two or more, "above" or "below" the second feature may include the first and second features being in direct contact, or the first and second features being in contact through another feature between them, and "above," "over," and "on top" the second feature may include the first feature being directly above or diagonally above the second feature, or simply indicate that the first feature is at a higher horizontal level than the second feature.

[0056] The damping piston 1 and the damper 2 according to an embodiment of the present invention are described below with reference to the accompanying drawings. The damper 2 according to an embodiment of the present invention includes the damping piston 1 according to an embodiment of the present invention.

[0057] Reference Figure 1 and Figure 2 As shown, the vibration damper 2 according to some embodiments of the present invention includes: a cylinder 210, a connecting rod 220, and a vibration damping piston 1 according to an embodiment of the present invention. The vibration damping piston 1 is located inside the cylinder 210 and is sealed to the inner circumferential surface of the cylinder 210. The connecting rod 220 extends into the cylinder 210, and the vibration damping piston 1 is connected to the connecting rod 220 so that the connecting rod 220 and the vibration damping piston 1 can move axially along the cylinder 210 to generate compressive damping force and restoring damping force (i.e., tensile damping force), thereby playing a vibration damping role.

[0058] In some embodiments, such as Figure 1 As shown, the damper 2 may also include a guide sealing assembly 230 and a floating sealing piston 240. The guide sealing assembly 230 seals the gap between the connecting rod 220 and the cylinder 210. The floating sealing piston 240 is located inside the cylinder 210 and is located on the side of the damping piston 1 away from the connecting rod 220.

[0059] Reference Figures 1-6 As shown, the damping piston 1 of the damper 2 according to an embodiment of the present invention may include: piston body 10, moving part 20 and first fixed part 31.

[0060] Specifically, the piston body 10 has a mounting cavity 101. A movable member 20 is movably mounted within the mounting cavity 101, and the movable member 20 cooperates with the piston body 10 to define a recovery channel 103 and a compression channel 102. The recovery channel 103 and the compression channel 102 are located on opposite sides of the movable member 20, for example... Figure 3 The moving member 20 is located on both sides along the first direction F1. The first fixing member 31 is mounted on the piston body 10, for example, the first fixing member 31 may be located in one of the recovery channel 103 and the compression channel 102.

[0061] There is a pushing or pulling force between the first fixed member 31 and the moving member 20. This pushing or pulling force can drive the moving member 20 away from or closer to the first fixed member 31 to adjust the flow area of ​​the restoration channel 103 and the compression channel 102.

[0062] Specifically, during the vibration damping process of the damper 2, the damping oil flowing through the recovery channel 103 can generate a recovery damping force, and the damping oil flowing through the compression channel 102 can generate a compression damping force.

[0063] The first fixing member 31 and the moving member 20 are under tension, which can drive the moving member 20 to move in a direction closer to the first fixing member 31. This reduces the flow area of ​​the channel closer to the first fixing member 31 and increases the corresponding damping force, while increasing the flow area of ​​the channel farther away from the first fixing member 31 and decreasing the corresponding damping force. For example, if the first fixing member 31 is located in the restoration channel 103, the flow area of ​​the restoration channel 103 can be reduced, and the flow area of ​​the compression channel 102 can be increased. Alternatively, the first fixing member 31 and the moving member 20 are under thrust, which can drive the moving member 20 to move in a direction farther away from the first fixing member 31. This increases the flow area of ​​the channel closer to the first fixing member 31 and decreases the corresponding damping force, while increasing the flow area of ​​the channel closer to the first fixing member 31 and increasing the corresponding damping force. For example, if the first fixing member 31 is located in the restoration channel 103, the flow area of ​​the restoration channel 103 can be increased, and the flow area of ​​the compression channel 102 can be reduced.

[0064] In this configuration, the direction of the force between the first fixed member 31 and the moving member 20 can remain constant, i.e., it can always be a pushing force or a pulling force, so that the moving member 20 can be moved in one direction. When it is necessary to move the moving member 20 in the opposite direction, other components on the piston body 10 can be used in conjunction with the moving member 20. Alternatively, the direction of the force between the first fixed member 31 and the moving member 20 can remain constant but the magnitude can be adjusted, for example, it can be an adjustable pushing force or an adjustable pulling force. There is a force between the moving member 20 and the piston body 10 so that the moving member 20 can move bidirectionally when the magnitude of the force of the first fixed member 31 changes. Or, the direction of the force between the first fixed member 31 and the moving member 20 can be changed, i.e., it can be changed between a pushing force and a pulling force, so that the moving member 20 can be moved bidirectionally and reciprocally, thereby allowing the damping force to be repeatedly adjusted.

[0065] The recovery channel 103 and the compression channel 102 are located on opposite sides of the moving member 20, for example, the first direction F1 can be as follows: Figure 3 The inward and outward directions are shown. The recovery channel 103 can be located outside the moving member 20 and the compression channel 102 can be located inside the moving member 20, or the recovery channel 103 can be located inside the moving member 20 and the compression channel 102 can be located outside the moving member 20.

[0066] Below, this article will focus on Figure 3 The following description uses the example of the recovery channel 103 being located inside the moving member 20 and the compression channel 102 being located outside the moving member 20. According to the following description, it is also understandable that the recovery channel 103 is located outside the moving member 20 and the compression channel 102 is located inside the moving member 20.

[0067] Since the recovery channel 103 and the compression channel 102 are located on opposite sides of the moving member 20, and the first fixing member 31 can be located on one side of the moving member 20 along the first direction F1, when the moving member 20 moves outward, the flow area of ​​the compression channel 102 decreases, and the flow area of ​​the recovery channel 103 increases, correspondingly increasing the compression damping force and decreasing the recovery damping force; when the moving member 20 moves inward, the flow area of ​​the compression channel 102 increases, and the flow area of ​​the recovery channel 103 decreases, correspondingly decreasing the compression damping force and increasing the recovery damping force.

[0068] thus, Figure 7 The two solid curves represent the state where the compressive damping force is minimum and the restoring damping force is maximum, while the two dashed curves represent the state where the compressive damping force is maximum and the restoring damping force is minimum. Figure 7 The area shown, region a, represents the adjustable range of the compressive damping force, and region b represents the adjustable range of the restoring damping force. Figure 8The two curves represent the compressive damping force and the restoring damping force of the moving part 20 when it is located in the middle of the mounting cavity 101 along the first direction F1.

[0069] In practical applications, the movable component 20 can adapt to the varying driving conditions of the suspension system 100 and the complex excitation conditions of the ground, moving inward or outward along the first direction F1 to adjust the magnitude of the provided restoring damping force and compression damping force, thereby greatly improving the comfort and sport performance of the suspension system 100.

[0070] For example, such as Figure 3 In the example shown, when the moving part 20 moves inward to its limit position, the compression hole 104 is fully open. At this point, the damping oil flows most smoothly in the compression channel 102, and the compression damping force is minimal, which is suitable for the overall vehicle comfort requirements. When the moving part 20 moves outward to its limit position, the recovery hole 105 is fully open. At this point, the damping oil flows most smoothly in the recovery channel 103, the recovery damping force is minimal, and the compression damping force is maximum, which is suitable for the overall vehicle handling and sport performance requirements. When the moving part 20 is near the middle position of the mounting cavity 101, both the recovery and compression are at a relatively intermediate level, which is suitable for the control and smoothness at higher vehicle speeds.

[0071] like Figure 9 The diagram shows the vibration damping effect of the vibration damper 2 in this embodiment and a passive vibration damper (i.e., a comparative example) in the related art. The horizontal axis represents time, and the vertical axis represents vibration. As can be seen from the diagram, the vibration damper 2 in this embodiment can adjust the current in the winding 22 according to the actual vibration to change the position of the moving part 20, thereby regulating the flow rate of the damping oil and creating different damping forces, thus achieving a faster vibration damping effect.

[0072] In some related technologies, variable damping force is generated by adding one or two devices with throttling effect to the passive damper, i.e., multiple damping pistons are stacked, or other throttling devices are added outside the damping piston. The overall structure is too complex, occupies a large space, and has high development costs.

[0073] In the embodiments of this application, even without adding a new throttling device, the damping force can be adjusted by changing the structure of the damping piston 1 itself. Furthermore, since the moving part 20 and the first fixed part 31 are both located within the piston body 10, they do not affect the appearance of the damping piston 1, and consequently, do not affect the structure of other components that cooperate with the damping piston 1 (such as the cylinder 210, connecting rod 220, etc.). This avoids affecting the overall product dimension chain relationship, prevents the occupation of excessive space within the cylinder 210, and allows the damping piston 1 to have a larger stroke within the cylinder 210, thus achieving a better vibration damping effect.

[0074] According to an embodiment of the present invention, the damping piston 1 of the damper 2 is driven to move by the thrust or pull generated between the first fixed member 31 and the moving member 20, so that the flow area of ​​the recovery channel 103 and the compression channel 102 is adjustable, thereby forming different sizes of recovery damping force and compression damping force, meeting the damping requirements under more working conditions, improving the damping effect, and the setting of the moving member 20 and the first fixed member 31 has no impact on the appearance of the piston body 10, so there is no need to change the appearance structure of the damping piston 1 and the structure of other mating parts on the damper 2, which is beneficial to reduce production costs, simplify the structure, and ensure the movement space of the damping piston 1.

[0075] Since the damping piston 1 of the damper 2 according to the embodiment of the present invention has the above-mentioned beneficial technical effects, the damper 2 according to the embodiment of the present invention drives the moving part 20 to move by generating a thrust or pull force between the first fixed part 31 and the moving part 20, so that the flow area of ​​the recovery channel 103 and the compression channel 102 can be adjusted, thereby forming different sizes of recovery damping force and compression damping force, meeting the damping requirements under more working conditions, improving the damping effect, and setting the moving part 20 and the first fixed part 31 has no impact on the appearance of the piston body 10, so that the appearance structure of the damping piston 1 and the structure of other mating parts on the damper 2 do not need to be changed, which is conducive to reducing production costs, simplifying the structure, and ensuring the movement space stroke of the damping piston 1.

[0076] In some embodiments, the first fixing member 31 is a magnetic member, which is a component that can generate a magnetic field or be attracted by magnetic force. The magnetic member can generate attraction or repulsion with other components located within the magnetic field. For example, the magnetic member can be a permanent magnet, an electromagnet, an iron block, etc.

[0077] like Figure 2 and Figure 3 As shown, the movable component 20 includes an iron core 21 and a winding 22. The winding 22 is wound around the iron core 21 so that it can form a magnetic field when energized, in conjunction with the iron core 21. When the winding 22 is energized, the first fixed component 31 and the movable component 20 exhibit magnetic force, which can be either a pushing or pulling force, enabling the movable component 20 to move. Furthermore, the strength of the magnetic field can change with the magnitude of the energizing current, thereby altering the magnitude of the attractive or repulsive force between the movable component 20 and the first fixed component 31.

[0078] After the winding 22 is energized, the first fixed member 31 exerts a magnetic force on the moving member 20. As the current in the winding 22 changes, the magnetic force changes, allowing the moving member 20 to move away from or towards the first fixed member 31, and to the desired position according to the current magnitude. Specifically, when the moving member 20 moves outward, the current-carrying area of ​​the compression channel 102 decreases, and the current-carrying area of ​​the recovery channel 103 increases, correspondingly increasing the compression damping force and decreasing the recovery damping force. When the moving member 20 moves inward, the current-carrying area of ​​the compression channel 102 increases, and the current-carrying area of ​​the recovery channel 103 decreases, correspondingly decreasing the compression damping force and increasing the recovery damping force. It should be noted that the current direction of the winding 22 can always be along a fixed direction to keep the direction of the magnetic field formed by the moving member 20 fixed. Alternatively, the current direction of the winding 22 can be variable to change the direction of the magnetic field formed by the moving member 20, thereby changing the direction of the force between the moving member 20 and the first fixed member 31, i.e., switching the magnetic force between pushing and pulling.

[0079] In some embodiments, such as Figures 2-4 As shown, the damping piston 1 may further include a second fixing member 32. The first fixing member 31 is disposed on one of the recovery channel 103 and the compression channel 102, and the second fixing member 32 may be disposed on the other of the recovery channel 103 and the compression channel 102, such that the first fixing member 31 and the second fixing member 32 are located on opposite sides of the moving member 20. The second fixing member 32 may also generate a thrust or pull force with the moving member 20, thereby driving the moving member 20 to move through the thrust or pull force.

[0080] In embodiments of this application including a first fixing member 31, a second fixing member 32, and a moving member 20, only one of them may include an iron core 21 and a winding 22, or any two may include an iron core 21 and a winding, or all three may include an iron core 21 and a winding 22. In particular, having only one of them include an iron core 21 and a winding 22 simplifies circuit connections. For example, in some embodiments, such as... Figures 2-4 As shown, both the first fixing member 31 and the second fixing member 32 are permanent magnets, and the moving member 20 includes an iron core 21 and a winding 22. That is, the magnetic fields of the first fixing member 31 and the second fixing member 32 are fixed, while the magnitude of the magnetic field of the moving member 20 is adjustable. This not only simplifies the circuit but also makes current adjustment easier to control.

[0081] In some specific embodiments, the magnetism of the first fixing member 31 and the second fixing member 32 may be opposite, and the magnetic forces between the first fixing member 31 and the second fixing member 32 and the moving member 20 are unequal when the winding 22 is energized. For example Figure 3As shown, the side of the first fixing member 31 facing the moving member 20 is the S pole, and the side of the second fixing member 32 facing the moving member 20 is the N pole. When the moving member 20 is energized, the side facing the first fixing member 31 is the S pole and the side facing the second fixing member 32 is the N pole, so that the magnetic force between the first fixing member 31 and the moving member 20 is a repulsive force, and the magnetic force between the second fixing member 32 and the moving member 20 is also a repulsive force. Because the two magnetic forces are unequal in magnitude, the moving member 20 is subjected to an unbalanced force, thereby enabling the moving member 20 to move along the first direction F1.

[0082] In some specific embodiments, both the first fixing member 31 and the second fixing member 32 are magnetic components with opposite magnetic properties and unequal magnetic forces. For example, the magnetic force of the first fixing member 31 is less than that of the second fixing member 32. In this case, when the winding 22 is not energized, the force between the winding 22 and the first fixing member 31 is less than the force between the winding 22 and the second fixing member 32. This allows the winding 22 and the moving member 20 to move along the first direction F1 to a limit position closer to the second fixing member 32. That is, the initial position of the moving member 20 is the limit position of movement, such as when it comes into contact with the second fixing member 32. After the winding 22 is energized, the moving part 20 has its own magnetism and will attract or repel the first fixed part 31 and the second fixed part 32. As the energizing current increases, the position of the moving part 20 can be changed, causing the moving part 20 to move closer to the first fixed part 31. Afterwards, the energizing current decreases, causing the moving part 20 to move closer to the second fixed part 32, thereby changing the magnitude of the compressive damping force and the restoring damping force generated during the movement.

[0083] Therefore, after the winding 22 is energized, it is easier to adjust the position of the moving part 20 and the magnitude of the damping force more accurately according to the initial position of the moving part 20 and the magnitude of the energizing current.

[0084] It should be noted that the magnetic force of the first fixing member 31 and the second fixing member 32 can be adjusted by changing the volume or material of the magnet.

[0085] In some specific embodiments, after the winding 22 is energized, both the first fixing member 31 and the second fixing member 32 attract each other with the moving member 20, or both the first fixing member 31 and the second fixing member 32 repel each other with the moving member 20. For example Figure 3 As shown, after the winding 22 is energized, the S pole of the first fixed member 31 is opposite to the S pole of the moving member 20, and the N pole of the second fixed member 32 is opposite to the N pole of the moving member 20. At the instant the winding 22 is energized, the position of the moving member 20 remains unchanged, and as the energizing current increases, the moving member 20 can gradually move from the initial position at one end to the other end along the first direction F1, making the position adjustment of the moving member 20 more accurate.

[0086] In some embodiments of the vibration damping piston 1 including the second fixing member 32, the first fixing member 31 is disposed in one of the recovery channel 103 and the compression channel 102, and the second fixing member 32 can be disposed in the other of the recovery channel 103 and the compression channel 102. The first fixing member 31 and the second fixing member 32 can both be magnetic, and the magnetism of the first fixing member 31 and the second fixing member 32 can be the same, so that the moving member 20 can move under the combined action of the first fixing member 31 and the second fixing member 32, thereby improving the sensitivity and controllability of the movement of the moving member 20.

[0087] For example, both the first fixing member 31 and the second fixing member 32 have their N poles facing the movable member 20. When the winding 22 is energized, the movable member 20 has its N pole facing the first fixing member 31 and its S pole facing the second fixing member 32. This allows the magnetic force between the first fixing member 31 and the movable member 20 to act as a pushing force, and the magnetic force between the second fixing member 32 and the movable member 20 to act as a pulling force, enabling the movable member 20 to move away from the first fixing member 31. Furthermore, the magnitude of the force acting on the movable member 20 can be adjusted by changing the current flowing through the winding 22, thereby adjusting the specific position of the movable member 20.

[0088] In some embodiments of the damping piston 1 that include a second fixing member 32, the first fixing member 31 is disposed in one of the recovery channel 103 and the compression channel 102, and the second fixing member 32 can be disposed in the other of the recovery channel 103 and the compression channel 102. The moving member 20 may include a magnetic element. One of the first fixing member 31 and the second fixing member 32 includes an iron core 21 and a winding 22, with the winding 22 wound around the iron core 21. When the winding 22 is energized, there is a magnetic force between the first fixing member 31 and the second fixing member 32 and the moving member 20. This magnetic force forms a pushing or pulling force, enabling the moving member 20 to move away from or towards the first fixing member 31 under the action of the magnetic force, thereby achieving damping force adjustment.

[0089] It should be noted that, in the above embodiments, the specific structure of the other of the first fixing member 31 and the second fixing member 32 is not limited. For example, the other can be an elastic member, a telescopic rod, or other component capable of applying pushing or pulling force to the moving member 20, all of which are within the protection scope of this application. In addition, the direction of the current flowing through the winding 22 can be fixed or changed according to actual conditions.

[0090] In some embodiments of the vibration damping piston 1 including a second fixing member 32, the first fixing member 31 is disposed in one of the recovery channel 103 and the compression channel 102, and the second fixing member 32 can be disposed in the other of the recovery channel 103 and the compression channel 102. The moving member 20 may include a magnetic element. Both the first fixing member 31 and the second fixing member 32 may include an iron core 21 and a winding 22, with the winding 22 wound around the iron core 21. The first fixing member 31 and the second fixing member 32 have opposite magnetic properties when the winding 22 is energized, and the magnetic forces between them and the moving member 20 are unequal, so that both the first fixing member 31 and the second fixing member 32 apply a pushing force or a pulling force to the moving member 20, causing the moving member 20 to move due to the unbalanced force. Furthermore, by adjusting the current magnitude of the respective windings 22 of the first fixing member 31 and the second fixing member 32, the force on the moving member 20 can be changed, which is beneficial for realizing bidirectional reciprocating movement of the moving member 20.

[0091] In some embodiments of the vibration damping piston 1 including a second fixing member 32, the first fixing member 31 is disposed in one of the recovery channel 103 and the compression channel 102, and the second fixing member 32 can be disposed in the other of the recovery channel 103 and the compression channel 102. The moving member 20 may include a magnetic element. Both the first fixing member 31 and the second fixing member 32 may include an iron core 21 and a winding 22, with the winding 22 wound around the iron core 21. The first fixing member 31 and the second fixing member 32 have the same magnetism when the winding 22 is energized, so that the first fixing member 31 and the second fixing member 32 apply pushing and pulling forces to the moving member, thereby causing the moving member 20 to move in the same direction due to the consistent force. Furthermore, by adjusting the current magnitude of the respective windings 22 of the first fixing member 31 and the second fixing member 32, the force on the moving member 20 can be changed, which is beneficial for accurate adjustment of the position of the moving member 20.

[0092] It should be noted that in embodiments where both the first fixing member 31 and the second fixing member 32 include windings 22, the two windings 22 can be energized simultaneously or independently, so that the magnetic force between the first fixing member 31 and the moving member 20 and the magnetic force between the second fixing member 32 and the moving member 20 can be controlled independently, thereby making the force on the moving member 20 more varied and flexible.

[0093] In some embodiments of this application, such as Figure 3As shown, the iron core 21 is provided with an annular groove 201, the axis of which is parallel to the moving direction of the moving member 20 (e.g., parallel to the radial direction of the damping piston 1), and the winding 22 is embedded in the annular groove 201. On the one hand, the winding 22 is arranged in an annular shape in the annular groove 201, which facilitates the accurate formation of the N pole and S pole arranged along the first direction F1, ensuring the magnitude of the force between the moving member 20 and the first fixed member 31 and the second fixed member 32; on the other hand, the annular groove 201 can limit the winding 22, preventing the winding 22 from falling off during the reciprocating movement of the moving member 20 and affecting the damping force adjustment.

[0094] In some specific embodiments, reference continues to be made to... Figure 3 As shown, the opening of the annular groove 201 can be provided with a retaining edge to reduce the width of the opening (e.g., Figure 3 The dimension shown in the vertical direction is smaller than the width of the annular groove 201 (e.g., Figure 3 (as shown in the dimensions in the vertical direction), the retaining edge can further prevent the winding 22 from coming out of the slot of the annular groove 201, and the anti-detachment effect is better.

[0095] In some specific embodiments, such as Figure 2 and Figure 3 As shown, the power line 50 of winding 22 can be led out at any position circumferentially from the annular groove 201, for example, it can be led out from the end of the annular groove 201 along the second direction F2 (e.g. Figure 3 As shown (leading out from the lower end), the groove wall of the annular groove 201 can be provided with a wiring groove for accommodating the power cord 50, and the piston body 10 can be provided with a wire hole for the power cord 50 to pass through, so as to avoid the power cord 50 from moving too much during the movement of the moving part 20 and affecting the stability of the electrical connection.

[0096] The piston body 10 according to some embodiments of the present invention is described below with reference to the accompanying drawings.

[0097] According to some embodiments of the present invention, such as Figures 3-6 As shown, the piston body 10 has an annular receiving cavity 111, and one axial end of the piston body 10 (the axial direction of the piston body 10 is as shown) Figure 3 The second direction F2 shown has one axial end as follows: Figure 3 The lower end shown is provided with a first recovery hole 105a and a first compression hole 104a, and the other axial end of the piston body 10 (as shown) Figure 3 The upper end of the annular cavity 111 is open. The annular cavity 111 is provided with a plurality of fan-shaped partitions 112, and an installation cavity 101 is formed between two adjacent fan-shaped partitions 112. The bottom wall of the installation cavity 101 is provided with a first restoration hole 105a and a first compression hole 104a.

[0098] The mounting cavity 101 is defined by multiple sector-shaped partitions 112, which facilitates control over the size of the mounting cavity 101, making the structure of the mounting cavity 101 more compatible with that of the movable component 20. This allows the movable component 20 to move more smoothly within the mounting cavity 101 and ensures sufficient mating area between the movable component 20 and the sector-shaped partitions 112, thereby preventing the compression channel 102 and the recovery channel 103 from communicating during the movement of the movable component 20. Furthermore, the movable component 20 can be installed into the mounting cavity 101 through an open opening, making assembly easier.

[0099] For example, in some embodiments, such as Figure 5 As shown, the mounting cavity 101 is a radially elongated strip, and the planes containing the opposite sides of two adjacent fan-shaped partitions 112 are parallel to each other. Therefore, the mounting cavity 101 can effectively guide the movement of the movable member 20 and ensure that during movement, the sides of the fan-shaped partitions 112 can contact the surface of the movable member 20, thus ensuring the sealing effect of the movable member 20 in separating the restoration channel 103 and the compression channel 102.

[0100] It should be noted that the number of first restoration holes 105a corresponding to the same mounting cavity 101 can be one or more, and the number of first compression holes 104a corresponding to the same mounting cavity 101 can be one or more.

[0101] Furthermore, the movable member 20 can divide the mounting cavity 101 into a compression channel 102 and a recovery channel 103 arranged along the first direction F1. That is, the compression channel 102 and the recovery channel 103 are located on both sides of the movable member 20 along the first direction F1, respectively. The recovery channel 103 communicates with the first recovery hole 105a, the compression channel 102 communicates with the first compression hole 104a, and the second direction F2 intersects with the first direction F1. It should be noted that the flow area refers to the area at the smallest cross-sectional area perpendicular to the second direction F2, which can be the cross-sectional area at the compression channel 102 and the recovery channel 103, or the cross-sectional area at the first recovery hole 105a or the first compression hole 104a.

[0102] The projections of the first restoration hole 105a and the first compression hole 104a along the first direction F1 are both offset from the projection of the moving member 20 along the first direction F1. The moving member 20 can adjust the flow area by blocking the first restoration hole 105a or the first compression hole 104a, or by changing the volume of the compression channel 102 and the restoration channel 103.

[0103] For example, Figure 3As shown, the distance between the far ends of the first restoration hole 105a and the first compression hole 104a located at the same end is less than the size of the mounting cavity 101 along the first direction F1, so that when the moving member 20 moves to different positions, it can at least partially block the restoration hole 105, or at least partially block the compression hole 104, or simultaneously block at least partially the restoration hole 105 and at least partially the compression hole 104, thereby realizing the adjustment of the flow area and the adjustment of the damping force.

[0104] In some embodiments, such as Figure 3 As shown, a spacer 116 is provided between the first recovery hole 105a and the first compression hole 104a. The spacer 116 prevents the first recovery hole 105a and the first compression hole 104a from communicating with each other. Furthermore, the radial dimension of the moving member 20 is larger than the radial dimension of the spacer 116, so that during the movement of the moving member 20, it will inevitably at least partially block at least one of the first recovery hole 105a and the first compression hole 104a. Thus, the compression damping force and the recovery damping force can be continuously adjusted during the movement of the moving member 20. In other words, before the moving member 20 fully opens the first recovery hole 105a, the blocking area of ​​the first compression hole 104a is already gradually increasing, and the flow area of ​​the first compression hole 104a is already gradually decreasing; before the moving member 20 fully opens the first compression hole 104a, the blocking area of ​​the first recovery hole 105a is already gradually increasing, and the flow area of ​​the first recovery hole 105a is already gradually decreasing. This avoids the situation where the compressive damping force and the restoring damping force remain unchanged during the movement of the moving part 20, making it unclear how the moving part 20 moves to achieve the required damping force adjustment.

[0105] According to some embodiments of the present invention, such as Figures 2-6 As shown, the vibration-damping piston 1 also includes an end cap 12, which seals the opening of the annular receiving cavity 111 to prevent the moving part 20 in the mounting cavity 101 from coming out of the opening, thereby improving the stability of the moving part 20. Furthermore, the end cap 12 is provided with a second recovery hole 105b coaxial with the first recovery hole 105a on the piston body 10, and a second compression hole 104b coaxial with the first compression hole 104a on the piston body 10. The first recovery hole 105a and the second recovery hole 105b are connected through a recovery channel 103, and the first compression hole 104a and the second compression hole 104b are connected through a compression channel 102.

[0106] The coaxial alignment of the first recovery hole 105a and the second recovery hole 105b, as well as the coaxial alignment of the first compression hole 104a and the second compression hole 104b, facilitates the improvement of the accuracy of flow area control during the movement of the moving part 20. Furthermore, the piston body 10 and the end cap 12 are separate, mutually cooperating components, which facilitates the machining of structures such as the mounting cavity 101, the first recovery hole 105a, the second recovery hole 105b, the first compression hole 104a, and the second compression hole 104b, thus reducing the difficulty of the machining process.

[0107] In some embodiments including the second fixing member 32, the first fixing member 31 is disposed on one of the recovery channel 103 and the compression channel 102, and the second fixing member 32 may be disposed on the other of the recovery channel 103 and the compression channel 102. When the moving member 20 abuts against the first fixing member 31, the moving member 20 at least partially blocks the first recovery hole 105a and at least partially opens the first compression hole 104a. In other words, when the moving member 20 moves along the first direction F1 to its extreme position at one end, the flow area of ​​the first compression hole 104a can be opened to the maximum extent possible to minimize the compression damping force.

[0108] In some specific embodiments, when the movable member 20 is in contact with the first fixed member 31, the movable member 20 fully opens the first compression hole 104a and completely blocks the first restoration hole 105a, resulting in the minimum compression damping force and the maximum restoration damping force. This also facilitates more precise adjustment of the compression damping force and the restoration damping force when the movable member 20 moves in the opposite direction.

[0109] In some embodiments including the second fixing member 32, when the moving member 20 is abutting against the second fixing member 32, the moving member 20 at least partially blocks the first compression hole 104a and at least partially opens the first recovery hole 105a. In other words, when the moving member 20 moves along the first direction F1 to the extreme position at the other end, it can maximize the opening degree of the flow area of ​​the first recovery hole 105a to minimize the recovery damping force.

[0110] In some specific embodiments, when the movable member 20 is in contact with the second fixed member 32, the movable member 20 fully opens the first restoration hole 105a and completely blocks the first compression hole 104a, resulting in the minimum restoration damping force and the maximum compression damping force. This also facilitates more precise adjustment of the restoration damping force and compression damping force when the movable member 20 moves in the opposite direction.

[0111] In some embodiments of the present invention, such as Figures 3-5As shown, the piston body 10 includes an inner cylinder 113, an outer cylinder 114, and a connecting end wall 115. The inner cylinder 113 defines a mounting hole for mounting the connecting rod 220 of the shock absorber 2, so that when the connecting rod 220 passes through the mounting hole, the connecting rod 220 and the shock-absorbing piston 1 can be connected, allowing them to move synchronously. The outer cylinder 114 surrounds the inner cylinder 113, and the connecting end wall 115 connects one axial end of the inner cylinder 113 and one axial end of the outer cylinder 114, so that the inner cylinder 113, the outer cylinder 114, and the connecting end wall 115 cooperate to define an annular receiving cavity 111, which is simple and robust in structure.

[0112] The first fastener 31 can be installed in the inner cylinder 113. In embodiments including the second fastener 32, the second fastener 32 can be installed in the outer cylinder 114, for example... Figure 3 As shown, the first fixing member 31 can be attached to the outer peripheral surface of the inner cylinder 113, and the second fixing member 32 can be attached to the inner peripheral surface of the outer cylinder 114 to ensure that the first fixing member 31 and the second fixing member 32 are in a stable position and are not easy to move.

[0113] The sector-shaped partition 112 is located within the annular receiving cavity 111 between the inner cylinder 113 and the outer cylinder 114, and is connected to the connecting end wall 115. The movable member 20 is movably disposed between the inner cylinder 113 and the outer cylinder 114, and is located between two adjacent sector-shaped partitions 112. The two sector-shaped partitions 112 can restrict the movement direction of the movable member 20, and the inner cylinder 113 and the outer cylinder 114 can restrict the travel of the movable member 20, making it easier to control the process of the movable member 20 adjusting the compression damping force and the recovery damping force. Furthermore, the connecting end wall 115 is provided with a first compression hole 104a and a first recovery hole 105a, so that the first compression hole 104a and the first recovery hole 105a can communicate with the mounting cavity respectively, resulting in a simple structural design and easy processing.

[0114] In some embodiments that include end cap 12, such as Figure 3 and Figure 6 As shown, the end cap 12 includes an end cap wall 121 and a peripheral wall 122, with the end cap wall 121 and the peripheral wall 122 connected axially at one end. The end cap wall 121 can be an annular structure to form a through hole opposite to the mounting hole of the piston body 10, for mounting the connecting rod 220. It should be noted that the end cap 12 may include a peripheral wall connected to the inner circumference of the end cap wall 121, which is used to mate with the inner cylinder 113 of the piston body 10. The end cap 12 may also not include this peripheral wall, as long as the requirement that the end cap 12 can reliably connect with the piston body 10 is met.

[0115] like Figure 3As shown, the end cap 121 seals the open opening, and the end cap 121 is provided with a second compression hole 104b and a second recovery hole 105b, so that the second compression hole 104b can be coaxial with the first compression hole 104a, and the second recovery hole 105b can be coaxial with the first recovery hole 105a. The peripheral wall 122 of the end cap is sleeved on the piston body 10, for example, on the outer cylinder 114 of the piston body 10, which improves the reliability of the connection between the end cap 12 and the piston body 10 on the one hand, and helps to improve the sealing performance of the connection between the end cap 12 and the piston body 10 on the other hand.

[0116] In some specific embodiments, reference is made to Figure 3 As shown, the vibration-damping piston 1 also includes a flexible member 40, which is sleeved at the connection between the cover peripheral wall 122 and the piston body 10. The outer peripheral surface of the cover peripheral wall 122 and the outer peripheral surface of the piston body 10 are provided with grooves, and the flexible member 40 is provided with protrusions that are embedded in the grooves. The flexible member 40 can be used to seal the gap at the connection between the cover peripheral wall 122 and the piston body 10, thereby improving the sealing effect. Furthermore, the matching structure of the protrusion and the groove can play a limiting role in the axial direction of the piston body 10, preventing the end cap 12 from separating from the piston body 10, and can also play a limiting role in the circumferential direction of the piston body 10, preventing the end cap 12 from rotating relative to the piston body 10, and ensuring the coaxiality of the second compression hole 104b and the first compression hole 104a, and the coaxiality of the second recovery hole 105b and the first recovery hole 105a.

[0117] In some embodiments, such as Figures 3-5 As shown, the first fixing member 31 has an annular structure and is disposed between the sector-shaped partition 112 and the inner peripheral wall of the annular receiving cavity 111, for example, between the sector-shaped partition 112 and the inner cylinder 113. The structure of the first fixing member 31 is simpler. One first fixing member 31 can cooperate with multiple moving members 20 in multiple mounting cavities 101, and the reliable positioning of the first fixing member 31 can be achieved by the sector-shaped partition 112 and the inner peripheral wall of the annular receiving cavity 111, which simplifies the installation structure.

[0118] In some embodiments that include the second fastener 32, such as Figures 3-5 As shown, the second fixing member 32 has an annular structure and is disposed between the sector-shaped partition 112 and the outer peripheral wall of the annular receiving cavity 111, for example, between the sector-shaped partition 112 and the outer cylinder 114. The structure of the second fixing member 32 is simpler. One second fixing member 32 can cooperate with multiple moving members 20 in multiple mounting cavities 101, and the reliable positioning of the second fixing member 32 can be achieved by the sector-shaped partition 112 and the outer peripheral wall of the annular receiving cavity 111, which simplifies the installation structure.

[0119] According to some embodiments of the present invention, such as Figures 3-5As shown, there are multiple movable parts 20, which are arranged at intervals along the circumference of the piston body 10. Each mounting cavity 101 corresponds to one of the movable parts 20. Because multiple mounting cavities 101 are provided on the piston body 10, multiple recovery channels 103 and multiple compression channels 102 are formed, which increases the maximum flow rate of the damping oil in the overall damper 2, thus improving damping performance. Furthermore, the arrangement of multiple mounting cavities 101 along the circumference of the piston body 10 improves the uniformity of force on the damping piston 1 during the flow of damping oil, preventing the damping piston 1 from becoming stuck within the cylinder 210.

[0120] According to some embodiments of the present invention, such as Figures 1-3 As shown, the damper 2 also includes a flexible element 40, which is sleeved on the piston body 10 and is used to seal the gap between the piston body 10 and the cylinder 210 of the damper 2. For example, the flexible element 40 can be a rubber or silicone part. By sealing the gap with the flexible element 40, damping oil can be prevented from flowing through the gap between the piston body 10 and the cylinder 210, which helps to improve the accuracy of damping force adjustment.

[0121] In some embodiments, such as Figures 1-2 As shown, the shock absorber 2 also includes a first one-way valve 41 and a second one-way valve 42. The first one-way valve 41 is located in the recovery channel 103 and is used to ensure one-way flow of the recovery channel 103; the second one-way valve 42 is located in the compression channel 102 and is used to ensure one-way flow of the compression channel 102. The flow directions of the recovery channel 103 and the compression channel 102 are opposite, for example... Figure 2 As shown, the first check valve 41 controls the downward unidirectional flow of the recovery channel 103, and the second check valve 42 controls the upward unidirectional flow of the compression channel 102. Thus, the cooperation of the first check valve 41 and the second check valve 42 prevents the damping oil from leaking backward through the recovery channel 103 or the compression channel 102, which helps improve the accuracy of damping force adjustment.

[0122] The suspension system 100 according to an embodiment of the present invention includes a shock absorber 2 according to an embodiment of the present invention. Since the shock absorber 2 according to the embodiment of the present invention has the aforementioned beneficial technical effects, the suspension system 100 according to the embodiment of the present invention uses a thrust or pull force generated between the first fixed member 31 and the moving member 20 to drive the moving member 20 to move, making the flow area of ​​the recovery channel 103 and the compression channel 102 adjustable, thereby forming different magnitudes of recovery damping force and compression damping force, meeting the vibration reduction requirements under more working conditions, improving the vibration reduction effect, and the setting of the moving member 20 and the first fixed member 31 has no impact on the appearance of the piston body 10, eliminating the need to change the appearance structure of the damping piston 1 and the structure of other mating components on the shock absorber 2, which is beneficial for reducing production costs, simplifying the structure, and ensuring the travel space of the damping piston 1.

[0123] In some embodiments of the present invention, such as Figure 10 and Figure 11 As shown, the suspension system 100 also includes a control component 3 and a detection component. At least one of the first fixing member 31, the second fixing member 32, and the moving member 20 includes a winding 22. The control component 3 is connected to the winding 22 and is capable of controlling the energization state of the winding 22, such as controlling whether the winding 22 is energized and the magnitude of the energizing current.

[0124] The detection component includes at least one of a vibration acceleration sensor 4, a wheel angle sensor 5, a throttle opening sensor 6, a gyroscope sensor 7, and a wheel speed sensor 8. The detection component is connected to a control component 3, which controls the energization state of the winding 22 based on the detection results from the detection component.

[0125] The vibration acceleration sensor 4 is used to detect the acceleration of the shock absorber 2 to determine the vehicle body vibration acceleration. A sudden increase in acceleration value followed by a return to the original acceleration value indicates a single-point undulation in the suspension system 100; a sudden increase in acceleration value followed by a sustained increase indicates continuous undulation in the suspension system 100. A sudden change in wheel angle display from the wheel angle sensor 5 indicates the suspension system 100 has begun steering; continuous steering angle changes indicate continuous steering. The throttle opening sensor 6 determines whether the driver is accelerating or maintaining a constant speed. The gyroscope sensor 7 assists in determining the degree of forward and backward swaying and left and right swaying of the suspension system 100. The wheel speed sensor 8 identifies the speed of the suspension system 100 during driving.

[0126] Therefore, based on the signals received by various sensors on and off the spring, the signals enter the control component 3, and then the control strategy is used to ultimately control the output current of the winding 22, thereby achieving damping feedback to control the vehicle body. The damping force can be better matched with the actual state of the vehicle body, thus improving the overall vehicle comfort, handling and sport performance.

[0127] like Figure 10 and Figure 11 As shown, the control method of the suspension system 100 according to some embodiments of the present invention may include:

[0128] S1: Detect the status of shock absorber 2 and vehicle body;

[0129] S2: Control the current value of the winding 22 in the vibration damping piston 1 according to the detection results so that the moving part 20 moves along the first direction F1.

[0130] Therefore, the flow area of ​​the recovery channel 103 and the compression channel 102 of the shock absorber 2 is adjustable, thereby forming different sizes of recovery damping force and compression damping force, which can meet the damping needs under more working conditions, improve the damping effect, and make the damping force more matched with the actual state of the vehicle body, thus improving the overall vehicle comfort, handling and sport performance.

[0131] In some embodiments, step S2 may include: when the vehicle speed is 10 to 30 km / h and the acceleration value of the shock absorber 2 increases and then returns to the initial acceleration, controlling the moving part 20 to move to increase the flow area of ​​the compression channel 102.

[0132] In other words, the suspension system 100 and the corresponding road conditions are low-speed, single-point undulations. For example, when the suspension system 100 passes over a speed bump at low speed, a larger restoring damping force is needed to suppress vibration and thus stabilize the vehicle body. Specifically, by controlling the movement of the moving part 20 to increase the flow area of ​​the compression channel 102, the compression damping force is reduced, and the upward movement of the shock absorber 2 is greater, thereby reducing the upward displacement of the vehicle body, ensuring the stability and smoothness of the vehicle body, and thus improving the comfort when passing through single-point undulating road conditions.

[0133] In some embodiments, step S2 may include: controlling the moving member 20 to reciprocate along the first direction F1 while maintaining the acceleration value of the damper 2 for a predetermined time after the acceleration value increases.

[0134] In other words, the suspension system 100 corresponds to a road condition of continuous undulation. For example, when the suspension system 100 travels on a continuous rough road, it can operate at low, medium, or high speeds. By controlling the moving part 20 to reciprocate along the first direction F1, the relative sizes of the flow areas of the recovery channel 103 and the compression channel 102 can be changed at any time, thereby providing a damping force more suitable for the current needs and improving comfort.

[0135] In addition, as road conditions gradually worsen, the vibration acceleration value gradually increases, which can control the flow area of ​​the compression channel 102 to be gradually opened up, and the compression damping force will decrease, allowing the suspension system 100 to remain in a relatively stable state.

[0136] In some embodiments, step S2 may include: when a steering angle is detected, controlling the moving part 20 of the shock absorber 2 on the inner side of the steering to move to reduce the flow area of ​​the recovery channel 103, and controlling the moving part 20 of the shock absorber 2 on the outer side of the steering to move to reduce the flow area of ​​the compression channel 102.

[0137] In other words, the suspension system 100 corresponds to continuous cornering or stable cornering, and can operate at low, medium, or high speeds. During cornering, the suspension system 100 will tilt left and right. At this time, larger restoring damping forces and compression damping forces are required to act on the inner and outer sides of the vehicle body during cornering, respectively, to reduce the degree of tilt and improve overall vehicle comfort and handling. By controlling the moving component 20 to move along the first direction F1, the flow area of ​​the restoring channel 103 of the shock absorber 2 on the inner side of the cornering (e.g., the shock absorber 2 on the left side during a left turn) decreases, increasing the restoring damping force; the area of ​​the compression channel 102 of the shock absorber 2 on the outer side of the cornering (e.g., the shock absorber 2 on the right side during a left turn) decreases, increasing the compression damping force. This maintains the levelness of the entire vehicle body during cornering, reducing the degree of tilt.

[0138] It should be noted that when the suspension system 100 is turning continuously, due to the continuous change in steering direction, the shock absorber 2 on the left side alternates between the inside and outside of the steering direction, and the shock absorber 2 on the right side alternates between the outside and inside of the steering direction. Therefore, the moving part 20 of the shock absorber 2 on the left side can be controlled to reciprocate along the first direction F1, and the moving part 20 of the shock absorber 2 on the right side can reciprocate along the first direction F1, so as to always ensure that the restoring damping force of the shock absorber 2 on the inside of the steering direction increases and the compressive damping force of the shock absorber 2 on the outside of the steering direction increases, so that the suspension system 100 can have good stability in the continuous turning state.

[0139] In some embodiments, step S2 may include: when the vehicle speed is greater than 80 km / h, controlling the moving part 20 to be located at the middle of the mounting cavity 101 along the first direction F1.

[0140] In other words, when the suspension system 100 is traveling at high speed, the moving part 20 is in the middle of the installation strength, so that the restoring damping force and the compression damping force are kept at a relatively average level. At the same time, a slightly larger compression damping force and restoring damping force are needed to control the shaking, swaying and undulation of the vehicle body at high speed.

[0141] In some embodiments, step S2 may include: when the suspension system 100 accelerates, controlling the moving part 20 of the front shock absorber 2 to move to reduce the flow area of ​​the recovery channel 103, and controlling the moving part 20 of the rear shock absorber 2 to move to reduce the flow area of ​​the compression channel 102.

[0142] When the suspension system 100 accelerates, the front of the vehicle may lift up and the rear may collapse. Data collected by the vehicle's gyroscope sensor 7 will display the vehicle's pitch angle. At this time, the pitch angle is large. By controlling the movement of the moving part 20 of the front shock absorber 2, the restoring damping force can be increased to pull the front of the vehicle up and control the height of the front lift. By controlling the movement of the moving part 20 of the rear shock absorber 2, the compression damping force can be increased to hold the rear of the vehicle up and control the height of the rear collapse. Thus, the front and rear work together to better control the stability of the vehicle body.

[0143] In some embodiments, step S2 may include: when the suspension system 100 decelerates, controlling the moving part 20 of the front shock absorber 2 to move to reduce the flow area of ​​the compression channel 102, and controlling the moving part 20 of the rear shock absorber 2 to move to reduce the flow area of ​​the recovery channel 103.

[0144] When the suspension system 100 decelerates, the situation is the opposite of when the suspension system 100 accelerates. During deceleration, the suspension system 100 will experience a situation where the front of the vehicle collapses and the rear of the vehicle lifts up. By controlling and increasing the compression damping force of the front shock absorber 2 and increasing the recovery damping force of the rear shock absorber 2, the height of the rear lift and the height of the front collapse can be controlled, thereby better controlling the stability of the vehicle body.

[0145] It should be noted that in the above embodiments, when the wheel angle sensor 5 and the body gyroscope sensor 7 do not detect data, the windings 22 of the multiple shock absorbers 2 on the suspension system 100 can be input with the same current to provide the same damping force.

[0146] like Figure 3 As shown, in the embodiment where the moving part 20 includes a winding 22, the first fixing part 31 and the second fixing part 32 are both permanent magnets, and the magnetic force of the first fixing part 31 is greater than the magnetic force of the second fixing part 32, the method for specifically calculating the current value of the winding 22 in step S2 may include:

[0147] Calculate the current value according to the following formulas (1)-(4), and take the maximum current value as the actual current value of winding 22.

[0148] I=A1X1+B1………………………………(1)

[0149] I=A2X2+C1Y+B2…………………………(2)

[0150] I=A3X3+B3……………………(3)

[0151] I=C2Y…………………………………………(4)

[0152] A1, A2, A3, B1, B2, B3, C1, and C2 are all constants, X1 is the acceleration of the shock absorber 2, X2 is the steering angle, X3 is the pitch angle of the suspension system 100, and Y is the vehicle speed.

[0153] Formula (1) calculates the current that the current input device needs to output to the winding 22 based on the acceleration value detected by the vibration acceleration sensor 4, thereby stabilizing the vehicle body; Formula (2) calculates the required output current based on the steering angle and continuity detected by the wheel angle sensor 5 and the vehicle speed detected by the wheel speed sensor 8, thereby controlling the body roll; Formula (3) calculates the required output current based on the pitch angle detected by the body gyroscope sensor 7, thereby suppressing the discomfort caused by pitch motion; Formula (4) calculates the required output current based on the vehicle speed detected by the wheel speed sensor 8, thereby improving the driving stability of the vehicle body when driving at high speed.

[0154] When multiple parameters such as vibration acceleration, steering angle, vehicle speed, and pitch angle are detected simultaneously, multiple current values ​​can be calculated according to the corresponding formulas. By taking the maximum current value as the actual current value of winding 22, the suspension system 100 can be in the most stable and comfortable state.

[0155] Other configurations and operations of the shock absorber 2 and suspension system 100 according to embodiments of the present invention are known to those skilled in the art and will not be described in detail here.

[0156] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0157] In the description of this specification, the references to terms such as "embodiment," "specific embodiment," and "example" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0158] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A damping piston for a vibration damper, characterized in that, include: A piston body having a mounting cavity; A movable component is movably installed within the mounting cavity and cooperates with the piston body to define a recovery channel and a compression channel, the recovery channel and the compression channel being located on opposite sides of the movable component; as well as A first fixing member is mounted on the piston body; wherein... There is a pushing or pulling force between the first fixing member and the moving member that drives the moving member away from or towards the first fixing member to adjust the flow area of ​​the recovery channel and the compression channel; The first fixing member is a magnetic member, and the moving member includes an iron core and a winding. The winding is wound around the iron core. There is a magnetic force between the first fixing member and the moving member when the winding is energized. The magnetic force forms the pushing force or pulling force.

2. The damping piston of the damper according to claim 1, characterized in that, The first fixing member is disposed in one of the recovery channel and the compression channel, and the vibration damping piston further includes: The second fixing member is disposed in the other of the recovery channel and the compression channel. The first fixing member and the second fixing member have opposite magnetic properties, and the magnetic forces between the first fixing member and the second fixing member and the moving member are unequal when the winding is energized.

3. The damping piston of the damper according to claim 1, characterized in that, The first fixing member is disposed in one of the recovery channel and the compression channel, and the vibration damping piston further includes: A second fixing member is disposed in the other of the recovery channel and the compression channel. The second fixing member is a magnetic member, and the first fixing member and the second fixing member have the same magnetism.

4. The damping piston of the damper according to claim 1, characterized in that, The first fixing member is disposed in one of the recovery channel and the compression channel, and the vibration damping piston further includes: The second fixing member is disposed in the other of the recovery channel and the compression channel. The moving member includes a magnetic element. One of the first fixing member and the second fixing member includes an iron core and a winding. The winding is wound around the iron core. One of the first fixing member and the second fixing member has a magnetic force with the moving member when the winding is energized. The magnetic force forms the thrust or pull force.

5. The damping piston of the damper according to claim 1, characterized in that, The first fixing member is disposed in one of the recovery channel and the compression channel, and the vibration damping piston further includes: The second fixing member is disposed in the other of the recovery channel and the compression channel. The moving member includes a magnetic element. Both the first fixing member and the second fixing member include an iron core and a winding. The winding is wound around the iron core. The first fixing member and the second fixing member have opposite magnetic properties when the winding is energized and the magnetic forces between them and the moving member are not equal.

6. The damping piston of the damper according to claim 1, characterized in that, The first fixing member is disposed in one of the recovery channel and the compression channel, and the vibration damping piston further includes: The second fixing member is disposed in the other of the recovery channel and the compression channel. The moving member includes a magnetic element. Both the first fixing member and the second fixing member include an iron core and a winding. The winding is wound around the iron core. The first fixing member and the second fixing member have the same magnetism when the winding is energized.

7. The damping piston of the damper according to any one of claims 1-6, characterized in that, The iron core is provided with an annular groove, the axis of which is parallel to the moving direction of the moving component, and the winding is embedded in the annular groove.

8. The damping piston of the damper according to claim 1, characterized in that, The piston body has an annular receiving cavity. One axial end of the piston body is provided with a first restoration hole and a first compression hole. The other axial end of the piston body is provided with an opening of the annular receiving cavity. The annular receiving cavity is provided with a plurality of fan-shaped partitions. The mounting cavity is formed between two adjacent fan-shaped partitions.

9. The damping piston of the damper according to claim 8, characterized in that, The vibration damping piston also includes an end cap, which covers the open opening. The end cap is provided with a second recovery hole coaxial with the first recovery hole on the piston body and a second compression hole coaxial with the first compression hole on the piston body. The first recovery hole and the second recovery hole are connected through the recovery channel, and the first compression hole and the second compression hole are connected through the compression channel.

10. The damping piston of the damper according to claim 8, characterized in that, A spacer is provided between the first recovery hole and the first compression hole, and the radial dimension of the moving part is greater than the radial dimension of the spacer.

11. The damping piston of the damper according to claim 10, characterized in that, The first fixing member is disposed in one of the recovery channel and the compression channel, and the vibration damping piston further includes: A second fastener is provided in the other of the recovery channel and the compression channel; When the movable member abuts against the first fixed member, the movable member at least partially blocks the first restoration hole and at least partially opens the first compression hole; When the movable member abuts against the second fixed member, the movable member at least partially blocks the first compression hole and at least partially opens the first recovery hole.

12. The damping piston of the damper according to claim 11, characterized in that, When the movable part is in contact with the first fixed part, the movable part completely blocks the first restoration hole and fully opens the first compression hole; When the movable member is in contact with the second fixed member, the movable member completely blocks the first compression hole and fully opens the first recovery hole.

13. The damping piston of the damper according to claim 8, characterized in that, The mounting cavity is a radially elongated strip, and the planes on opposite sides of two adjacent sector-shaped partitions are parallel to each other.

14. The damping piston of the damper according to claim 8, characterized in that, The piston body includes: The inner cylinder defines a mounting hole for mounting the connecting rod of the shock absorber, and the first fastener is mounted on the inner cylinder; An outer cylinder surrounds the inner cylinder, a second fixing member of the vibration damping piston is installed on the outer cylinder, and a movable member is movably disposed between the inner cylinder and the outer cylinder; A connecting end wall is provided, which connects one axial end of the inner cylinder and one axial end of the outer cylinder. The connecting end wall is provided with the first compression hole and the first recovery hole. The fan-shaped partition is located in the annular receiving cavity between the inner cylinder and the outer cylinder and is connected to the connecting end wall.

15. The damping piston of the damper according to claim 9, characterized in that, The end cap includes an end wall and a peripheral wall. The end wall is connected to one axial end of the peripheral wall. The end wall seals the opening and is provided with a second compression hole and a second recovery hole. The peripheral wall is fitted onto the piston body. The vibration damping piston also includes a flexible component, which is sleeved at the connection between the cover peripheral wall and the piston body. The outer peripheral surface of the cover peripheral wall and the outer peripheral surface of the piston body are provided with grooves, and the flexible component is provided with protrusions that are embedded in the grooves.

16. The damping piston of the damper according to claim 8, characterized in that, It also includes a second fastener. The first fixing member is an annular structure and is disposed between the fan-shaped partition and the inner peripheral wall of the annular receiving cavity; The second fixing member is an annular structure and is located between the fan-shaped partition and the outer peripheral wall of the annular receiving cavity.

17. The damping piston of the damper according to claim 1, characterized in that, There are multiple movable components, which are arranged at intervals along the circumference of the piston body, and the mounting cavity is provided in a one-to-one correspondence with each movable component.

18. A vibration damper, characterized in that, The device includes a cylinder, a connecting rod, and a damping piston according to any one of claims 1-17, wherein the damping piston is disposed inside the cylinder and is sealed to the inner circumferential surface of the cylinder, the damping piston is connected to the connecting rod, and the connecting rod and the damping piston are movable along the axial direction of the cylinder.

19. The vibration damper according to claim 18, characterized in that, Also includes: A first one-way valve is disposed in the recovery channel and is used to make the recovery channel open in one direction only; as well as A second one-way valve is disposed in the compression channel and is used to make the compression channel unidirectionally open, while the opening directions of the recovery channel and the compression channel are opposite.

20. A suspension system, characterized in that, Includes the vibration damper according to any one of claims 18-19.

21. The suspension system according to claim 20, characterized in that, The damping piston further includes a second fixing member, and at least one of the first fixing member, the second fixing member, and the moving member includes a winding. The suspension system further includes: A control component, which is connected to the winding; The detection component includes at least one of a vibration acceleration sensor, a wheel angle sensor, a throttle opening sensor, a gyroscope sensor, and a wheel speed sensor. The detection component is connected to the control component. The control component is used to control the energizing state of the winding based on the detection result of the detection component.

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