Shock absorber piston, shock absorber, suspension system and vehicle

Abstract

This invention discloses a damping piston, a damper, a suspension system, and a vehicle. The damping piston has a recovery channel and a compression channel, and the flow areas of the recovery channel and the compression channel are independently adjustable. According to the embodiment of the damper of this invention, the flow areas of the recovery channel and the compression channel can be independently adjusted, thereby generating different magnitudes of recovery damping force and compression damping force to meet the damping requirements under more operating conditions, improving the damping effect and the flexibility of damping force adjustment.

Description

Technical Field

[0001] This invention relates to the field of vehicle technology, and more specifically, to a damping piston for a shock absorber, a shock absorber, a suspension system, and a vehicle. 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, wherein the damping force is adjustable.

[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] Another object of the present invention is to provide a vehicle having the above-described suspension system.

[0007] According to an embodiment of the present invention, the damping piston of the damper has a recovery channel and a compression channel, and the flow areas of the recovery channel and the compression channel can be adjusted independently.

[0008] According to an embodiment of the present invention, the damping piston of the damper can be independently adjusted by adjusting the flow area of ​​the recovery channel and the compression channel, thereby forming different magnitudes of recovery damping force and compression damping force, meeting the damping requirements under more working conditions, and improving the damping effect and the flexibility of damping force adjustment.

[0009] 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:

[0010] According to some embodiments of the present invention, the vibration damping piston includes: a piston body having a mounting cavity, one mounting cavity including two chambers; each chamber is provided with a movable member, the movable member cooperating with the piston body to define the recovery channel and the compression channel, wherein the two movable members corresponding to the same mounting cavity move independently to independently adjust the flow area of ​​the recovery channel and the compression channel.

[0011] According to some embodiments of the present invention, the vibration damping piston further includes a fixing member, which is at least partially disposed within the mounting cavity, and a thrust or pull force is generated between the fixing member and the moving member to drive the moving member to move.

[0012] According to some embodiments of the present invention, one of the fixing member and the moving member includes a winding and the other includes a permanent magnet, or both the fixing member and the moving member include windings adapted to be connected to an external power source.

[0013] According to some embodiments of the present invention, the fixing member includes a permanent magnet, and the moving member includes an iron core and the winding wound around the iron core.

[0014] According to some embodiments of the present invention, the fixing member includes a first fixing member and a second fixing member, one of the first fixing member and the second fixing member is the permanent magnet, and the other is an elastic member, the elastic member being used to apply an elastic force to the moving member in the opposite direction to the force of the permanent magnet.

[0015] According to some embodiments of the present invention, the elastic element is disposed between the permanent magnet and the moving element, or the elastic element is disposed on the side of the moving element facing away from the permanent magnet.

[0016] According to some embodiments of the present invention, the fixing member includes a first fixing member and a second fixing member respectively disposed in the recovery channel and the compression channel, wherein the first fixing member and the second fixing member are both permanent magnets.

[0017] According to some embodiments of the present invention, the first fixing member and the second fixing member have opposite magnetic properties, and the magnetic forces of the first fixing member and the second fixing member are not equal to those of the moving member when the winding is energized.

[0018] According to some embodiments of the present invention, the first fixing member and the second fixing member have the same magnetism.

[0019] According to some embodiments of the present invention, the fixing member includes an iron core and the winding wound around the iron core, and the moving member includes a permanent magnet.

[0020] 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.

[0021] According to some embodiments of the present invention, two chambers corresponding to the same mounting cavity are arranged axially along the piston body, and the partition wall of the two chambers is provided with a recovery communication hole and a compression communication hole. The moving member is adapted to divide the chamber into a first chamber and a second chamber arranged radially along the piston body. The recovery channel includes two first chambers and the recovery communication hole, and the compression channel includes two second chambers and the compression communication hole.

[0022] According to some embodiments of the present invention, when the movable member is located at one radial end of the mounting cavity, the movable member at least partially blocks the restoration communication hole and at least partially opens the compression communication hole; when the movable member is located at the other radial end of the mounting cavity, the movable member at least partially blocks the compression communication hole and at least partially opens the restoration communication hole.

[0023] According to some embodiments of the present invention, when the movable member is located at one radial end of the mounting cavity, the movable member completely blocks the restoration communication hole and completely opens the compression communication hole; when the movable member is located at the other radial end of the mounting cavity, the movable member completely blocks the compression communication hole and completely opens the restoration communication hole.

[0024] According to some embodiments of the present invention, the piston body has two annular receiving cavities arranged axially, the ends of the two annular receiving cavities being open away from each other, and a plurality of fan-shaped partitions are provided in the annular receiving cavities, with the chamber formed between two adjacent fan-shaped partitions. The vibration damping piston also includes two end caps, which respectively cover the end openings of the two annular receiving cavities, and each end cap is provided with a restoration hole coaxial with the restoration communication hole and a compression hole coaxial with the compression communication hole.

[0025] According to some embodiments of the present invention, the chamber is a radially elongated strip, and the planes on opposite sides of two adjacent sector-shaped partitions are parallel to each other.

[0026] 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 shock absorber; an outer cylinder surrounding the inner cylinder, the fixing member being mounted on the inner cylinder and / or the outer cylinder, and the movable member being movably disposed between the inner cylinder and the outer cylinder; and a connecting end wall connecting the axial middle portion of the inner cylinder and the axial middle portion of the outer cylinder, the connecting end wall being provided with the compression communication hole and the recovery communication hole, and 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.

[0027] According to some embodiments of the present invention, the end cap includes an end wall and a peripheral wall, the end wall and the peripheral wall are connected axially at one end, the end wall seals the end opening and is provided with the compression hole and the recovery hole, the peripheral wall is sleeved on the piston body, the vibration damping piston also includes a flexible member, the flexible member is sleeved at the connection between the two peripheral walls 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.

[0028] According to some embodiments of the present invention, the fixing member includes an annular structure and is disposed between the fan-shaped partition and the peripheral wall of the annular receiving cavity.

[0029] According to some embodiments of the present invention, there are multiple mounting cavities, which are arranged at circumferential intervals along the piston body.

[0030] 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.

[0031] According to some embodiments of the present invention, the vibration damper further includes: a first one-way valve plate, the first one-way valve plate being disposed in the recovery channel and used to make the recovery channel unidirectionally open; and a second one-way valve plate, the second one-way valve plate being 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.

[0032] The suspension system according to an embodiment of the present invention includes a shock absorber according to an embodiment of the present invention.

[0033] According to some embodiments of the present invention, the suspension system further includes: a control component connected to the damping piston; 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 being connected to the control component, the control component being used to control the flow area of ​​the recovery channel and the compression channel according to the detection result of the detection component.

[0034] The vehicle according to an embodiment of the present invention includes a suspension system according to an embodiment of the present invention.

[0035] 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

[0036] 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:

[0037] Figure 1 This is a schematic diagram of a vibration damper according to an embodiment of the present invention;

[0038] Figure 2 This is a partial structural schematic diagram of a vibration damper according to an embodiment of the present invention;

[0039] Figure 3 This is a schematic diagram of the structure of the vibration-damping piston according to an embodiment of the present invention;

[0040] Figure 4 This is a bottom view of the upper end cap according to an embodiment of the present invention;

[0041] Figure 5 yes Figure 4 A sectional view;

[0042] Figure 6 This is a top view of the piston body according to an embodiment of the present invention;

[0043] Figure 7 yes Figure 6 A sectional view;

[0044] Figure 8 This is a top view of the lower end cap according to an embodiment of the present invention;

[0045] Figure 9 yes Figure 8 A sectional view;

[0046] Figure 10 This is a damping schematic diagram of a shock absorber according to an embodiment of the present invention, wherein both the compressive damping force and the restoring damping force are at their maximum values;

[0047] Figure 11 This is a damping schematic diagram of a shock absorber according to an embodiment of the present invention, wherein both the compressive damping force and the restoring damping force are at their minimum values;

[0048] Figure 12 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;

[0049] Figure 13 This is a control schematic diagram of a suspension system according to an embodiment of the present invention;

[0050] Figure 14 This is a schematic diagram of a suspension system according to an embodiment of the present invention.

[0051] Figure label:

[0052] 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;

[0053] Shock absorber 2; cylinder 210; connecting rod 220; guide sealing assembly 230; floating sealing piston 240;

[0054] Vibration damping piston 1;

[0055] Piston body 10; mounting cavity 101; chamber 13; compression channel 102; recovery channel 103; compression hole 104; recovery hole 105; first chamber 106; second chamber 107; recovery connecting hole 108; compression connecting hole 109; 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;

[0056] Moving part 20; iron core 21; annular groove 201; winding 22;

[0057] First fastener 31; Second fastener 32;

[0058] Flexible component 40; First check valve 41; Second check valve 42;

[0059] Power cord 50;

[0060] First direction F1; Second direction F2. Detailed Implementation

[0061] 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.

[0062] 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.

[0063] 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.

[0064] 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.

[0065] 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.

[0066] 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.

[0067] Reference Figures 1-3 As shown, the damping piston 1 of the damper 2 according to an embodiment of the present invention has a recovery channel 103 and a compression channel 102, and the flow areas of the recovery channel 103 and the compression channel 102 can be adjusted independently.

[0068] During the vibration damping process of the damper 2, the damping oil flowing through the recovery channel 103 generates a recovery damping force, and the damping oil flowing through the compression channel 102 generates a compression damping force. Therefore, the recovery damping force and the compression damping force can be independently adjusted. Specifically, a decrease in the flow area of ​​the compression channel 102 corresponds to an increase in the compression damping force; an increase in the flow area of ​​the compression channel 102 corresponds to a decrease in the compression damping force; a decrease in the flow area of ​​the recovery channel 103 corresponds to an increase in the recovery damping force; and an increase in the flow area of ​​the recovery channel 103 corresponds to a decrease in the recovery damping force.

[0069] In the embodiments of this application, the flow area of ​​the recovery channel 103 and the flow area of ​​the compression channel 102 can be changed independently, thereby allowing the recovery damping force and the compression damping force to be changed independently. For example, the recovery damping force can remain unchanged while the compression damping force changes; or the compression damping force can remain unchanged while the recovery damping force changes; or the compression damping force and the recovery damping force can be changed simultaneously.

[0070] Therefore, the damping force of damper 2 can be adjusted more flexibly and variablely. For example, in some situations, it can be like... Figure 10 The diagram shows that both the restoring damping force and the compressive damping force are at their maximum values; or it can be done as follows: Figure 11 The result is shown to minimize both the restoring damping force and the compressive damping force.

[0071] In practical applications, the damping piston 1 can adaptively adjust the magnitude of the restoring damping force and the compression damping force provided according to the vehicle's varied driving conditions and complex ground excitation conditions, thereby greatly improving the vehicle's comfort and handling performance. For example, by minimizing the compression damping force, it meets the needs of overall vehicle comfort; by minimizing the restoring damping force and maximizing the compression damping force, it meets the needs of overall vehicle handling and handling performance; and by keeping both the restoring and compression damping forces at a relatively intermediate level, it is suitable for a sense of control and smoothness at higher vehicle speeds.

[0072] In addition, such as Figure 12 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 related technologies. 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 individually adjust the flow area of ​​the recovery channel 103 and the compression channel 102 according to the actual vibration, thereby regulating the flow rate of the damping oil and generating different damping forces, thus achieving a faster vibration damping effect.

[0073] According to an embodiment of the present invention, the damping piston 1 of the damper 2 can be independently adjusted by means of the flow area of ​​the recovery channel 103 and the compression channel 102, thereby forming different sizes of recovery damping force and compression damping force, so as to meet the damping requirements under more working conditions and improve the damping effect and the flexibility of damping force adjustment.

[0074] 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 can independently adjust the flow area of ​​the recovery channel 103 and the compression channel 102 to form different sizes of recovery damping force and compression damping force, thereby meeting the damping requirements under more working conditions and improving the damping effect and the flexibility of damping force adjustment.

[0075] According to some embodiments of the present invention, such as Figures 1-9As shown, the vibration damping piston 1 may include: piston body 10 and moving part 20.

[0076] Specifically, the piston body 10 has a mounting cavity 101, which includes two chambers 13, for example, the two chambers 13 can be arranged along a second direction F2 (e.g. Figure 3 The arrangement is shown in the vertical direction. Each chamber 13 is provided with a movable member 20, which cooperates with the piston body 10 to define the recovery channel 103 and the compression channel 102. Moving the movable member 20 can change the flow area of ​​the recovery channel 103 and the compression channel 102.

[0077] In this application, the arrangement of the recovery channel 103 and the compression channel 102 is not limited. For example, the recovery channel 103 and the compression channel 102 are located on opposite sides of each moving member 20, such as along the first direction F1 (e.g., along the first direction F1). Figure 3 On both sides of the first direction (shown in the inward and outward directions), the second direction F2 intersects (e.g., perpendicularly) the first direction F1. That is, the recovery channel 103 includes space on one side of each moving member 20, and the compression channel 102 includes space on the other side of each moving member 20. For example, the recovery channel 103 may be located on one side of one moving member 20 along the first direction F1, and the compression channel 102 may be located on the other side of the moving member 20 along the first direction F1. Here, the recovery channel 103 and the compression channel 102 may be located on the same side or different sides, all of which are within the scope of protection of this invention.

[0078] Furthermore, the two movable parts 20 corresponding to the same mounting cavity 101 can move independently to independently adjust the flow area of ​​the restoration channel 103 and the compression channel 102. The adjustment of the flow area of ​​the restoration channel 103 and the compression channel 102 is achieved by moving different movable parts 20, making the flow area adjustment more flexible and versatile, and simpler and more accurate.

[0079] According to some embodiments of the present invention, such as Figure 2 and Figure 3 As shown, the vibration damping piston 1 also includes a fixing member, which is disposed within the mounting cavity 101. A thrust or pull force can be generated between the fixing member and the moving member 20 to drive the moving member 20 to move. The fixing member is fixed in position relative to the piston body 10, so that the force between the fixing member and the moving member 20 drives the moving member 20 to move without causing the fixing member to move, thereby making the movement control of the moving member 20 more sensitive and accurate.

[0080] It should be noted that the fixed part and the moving part 20 may only generate a thrust and push the moving part 20 to move; or the fixed part and the moving part 20 may only generate a tension and pull the moving part 20 to move; or the fixed part and the moving part 20 may generate both a thrust and a tension, and push the moving part 20 to move and pull the moving part 20 to move, thereby making the motion state of the moving part 20 more diversified. For example, the moving part 20 can be reciprocated to increase or decrease the flow area of ​​the restoration channel 103 and the flow area of ​​the compression channel 102.

[0081] In some embodiments, at least one of the fixing member and the moving member 20 corresponding to the same chamber 13 includes a winding 22. Specifically, one of the fixing member and the moving member 20 includes a winding 22 and the other includes a permanent magnet (or magnet), or both the fixing member and the moving member 20 include a winding 22. The winding 22 can be connected to an external power source. When the winding 22 is energized by an external power source, the fixing member and the moving member 20 can be magnetically engaged, so that the fixing member can apply a driving force to the moving member 20 to move the driving member 20, thereby adjusting the flow area of ​​the corresponding channel.

[0082] In some specific embodiments, the winding 22 can be configured to have an adjustable current, such as adjustable current magnitude or adjustable current direction, so as to adjust the magnetic direction or magnitude between the fixing member and the driving member 20. The magnetic force adjustment can drive the moving member 20 to move, thereby adjusting the current flow area of ​​the corresponding channel (restoration channel 103 or compression channel 102) to achieve damping force adjustment.

[0083] Furthermore, the two movable members 20 corresponding to the same mounting cavity 101 can move independently to independently adjust the flow area of ​​the restoration channel 103 and the compression channel 102. Specifically, the independent adjustment of the movement of the two movable members 20 can be achieved by independently adjusting the energizing current of the windings 22 of the two chambers 13 corresponding to the same mounting cavity 101.

[0084] The components used to magnetically engage with the winding 22 can generate a magnetic field or include components that can be attracted by a magnetic force, thereby generating an attractive or repulsive force with the winding 22, thus creating a pushing or pulling force on the moving part 20. For example, the components used to magnetically engage with the winding 22 can be permanent magnets, electromagnets, iron blocks, etc. For example, the winding 22 can generate a magnetic field when energized, and the strength of the magnetic field can change with the magnitude of the energizing current, thereby changing the magnitude of the attractive or repulsive force between it and other components.

[0085] Of course, the way the fixing member applies driving force to the moving member 20 includes, but is not limited to, magnetic force, and can also be other forms of pushing or pulling force. For example, in some specific embodiments, the fixing member and the moving member 20 are magnetically engaged; in other embodiments, the fixing member and the moving member 20 are magnetically engaged, and the fixing member is adapted to apply elastic force to the moving member 20 to form a pushing or pulling force, all of which are within the protection scope of this invention. Thus, as Figure 10 and Figure 11 As shown, both the compressive damping force and the restoring damping force can be adjusted within a certain range.

[0086] In practical applications, the movable component 20 can adapt to the varying driving conditions of the vehicle and the complex excitation conditions of the ground to adjust the magnitude of the restoring damping force and the compressive damping force provided, thereby greatly improving the comfort and handling performance of the vehicle.

[0087] For example, such as Figure 3 In the example shown, when the moving part 20 moves inward to its extreme position, the compression hole 104 is fully opened. At this position, the damping oil flows most smoothly in the compression channel 102, and the compression damping force is minimized. When the moving part 20 moves outward to its extreme position, the recovery hole 105 is fully opened. At this position, the damping oil flows most smoothly in the recovery channel 103, the recovery damping force is minimized, and the compression damping force is maximized. 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.

[0088] It should be noted that in embodiments where the recovery channel 103 and the compression channel 102 are located on opposite sides of the moving member 20 along the first direction F1, 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.

[0089] 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.

[0090] In some specific embodiments, such as Figure 3As shown, the fixing components include a first fixing component 31 and a second fixing component 32, which are respectively disposed in the recovery channel 103 and the compression channel 102. Since the recovery channel 103 and the compression channel 102 are located on both sides of each moving component 20, and the first fixing component 31 and the second fixing component 32 are respectively disposed in the recovery channel 103 and the compression channel 102, the first fixing component 31 and the second fixing component 32 are located on both sides of the moving component 20 corresponding to the same chamber 13 along the first direction F1. After the winding 22 is energized, the first fixing component 31 and the second fixing component 32 can generate opposite forces on the moving component 20, one of which is a magnetic force. As the current in the winding 22 changes, the magnetic force changes, enabling the moving component 20 to reciprocate along the first direction F1. Specifically, when the moving part 20 moves outward, the flow area of ​​the compression channel 102 decreases and the flow area of ​​the recovery channel 103 increases, corresponding to an increase in compression damping force and a decrease in recovery damping force; when the moving part 20 moves inward, the flow area of ​​the compression channel 102 increases and the flow area of ​​the recovery channel 103 decreases, corresponding to a decrease in compression damping force and an increase in recovery damping force.

[0091] Therefore, by setting two chambers 13, and at least two chambers 13 are provided with fixed and movable parts 20, the movable parts 20 in the two chambers 13 can move, and the two movable parts 20 can move independently, so that the flow area of ​​the recovery channel 103 and the flow area of ​​the compression channel 102 can be changed separately, thereby allowing the recovery damping force and the compression damping force to be changed separately.

[0092] by Figure 3 Taking the illustrated embodiment as an example, under the action of a variable magnetic force, the upper moving member 20 can move outward to increase the compressive damping force, while the lower moving member 20 can move inward to increase the restoring damping force; or the upper moving member 20 can move inward to decrease the compressive damping force, while the lower moving member 20 can move outward to decrease the restoring damping force. Therefore, the damping force adjustment of the shock absorber 2 is more flexible and variable.

[0093] In some embodiments, the two chambers 13 can be arranged along the second direction F2, and the fixed members and moving members 20 located in the same chamber 13 can be arranged along the first direction F1, so that the fixed members in the two chambers 13 are less likely to interfere with each other, and the position control of the two moving members 20 is more accurate.

[0094] 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.

[0095] In the embodiment of this application that includes the movable component 20, 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 both the movable component 20 and the fixed component are 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.

[0096] In some embodiments of the present invention, such as Figure 3 As shown, the fixed component includes a permanent magnet, and the moving component 20 includes an iron core 21 and a winding 22. The winding 22 is wound around the iron core 21 so that when the winding 22 is energized, the two ends of the iron core 21 form N poles and S poles, generating a magnetic field. The magnetic field can generate a magnetic force with the permanent magnet, thereby driving the moving component 20 to move. In the above embodiment, only the moving component 20 includes the winding 22, and the fixed component does not need to be electrically connected, which is more conducive to simplifying the circuit connection.

[0097] In some embodiments, such as Figure 2 and Figure 3 As shown, the fixing components include a first fixing component 31 and a second fixing component 32. One of the first fixing component 31 and the second fixing component 32 is a permanent magnet, and the other is an elastic component, such as a tension spring, a compression spring, or a spring sheet. The permanent magnet can cooperate with the moving component 20 to generate magnetic force, which can be a pushing or pulling force. The elastic component is used to apply a spring force to the moving component 20 in the opposite direction to the force exerted by the permanent magnet. The cooperation of the elastic component, the permanent magnet, and the winding 22 facilitates the control of the magnetic field strength, and the elastic component has advantages such as low cost and light weight.

[0098] In the above embodiments, the position of the elastic element can be flexibly set. For example, the elastic element can be set between the permanent magnet and the moving part 20. In other words, the elastic element and the permanent magnet are set on the same side of the moving part 20 to make the structure compact. For another example, the elastic element can be set on the side of the moving part 20 away from the permanent magnet. In other words, the elastic element and the permanent magnet are respectively set on opposite sides of the moving part 20 so that the positions of the elastic element and the permanent magnet do not interfere with each other, which facilitates assembly and fixation.

[0099] For example, in some specific embodiments where the first fixing member 31 is an elastic member, the elastic member can be a compression spring, used to apply a pushing force to the moving member 20. When the winding 22 is not energized, under the magnetic attraction of the second fixing member 32 and the pushing force of the compression spring, the moving member 20 can move along the first direction F1 to a position closer to the second fixing member 32, i.e., the initial position of the moving member 20 is the limit position of movement, such as when it abuts against the second fixing member 32. After the winding 22 is energized, it possesses magnetism and generates a repulsive magnetic force with the second fixing member 32. Furthermore, as the energizing current increases, it can change the position of the moving member 20, causing it to move closer to the first fixing member 31, thereby changing the magnitude of the damping force generated during the movement.

[0100] 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.

[0101] In some embodiments where the fasteners include a first fastener 31 and a second fastener 32, such as Figure 3 As shown, the first fixing member 31 can be located in the recovery channel 103, and the second fixing member 32 can be located in the compression channel 102. Both the first fixing member 31 and the second fixing member 32 are permanent magnets. Therefore, neither the first fixing member 31 nor the second fixing member 32 needs to be electrically connected during operation, which simplifies the structure. They can also form a magnetic force with the moving member 20 from both sides, making the movement of the moving member 20 more flexible.

[0102] In some specific embodiments of the present invention, the first fixing member 31 and the second fixing member 32 have opposite magnetic properties, and the magnetic forces exerted by the first fixing member 31 and the second fixing member 32 on 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, resulting in an imbalance of forces on the moving member 20 and thus causing it to move. 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.

[0103] 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. Furthermore, by adjusting the magnitude of the current flowing through the winding 22, the moving member 20 can reciprocate along the first direction F1.

[0104] In some specific embodiments, the magnetic forces of the first fixing member 31 and the second fixing member 32 are not equal. 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 moving member 20 and the first fixing member 31 is less than the force between the moving member 20 and the second fixing member 32. This allows the moving member 20 to move along the first direction F1 to a position closer to the second fixing member 32, i.e., 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, it has its own magnetism and will have mutual attraction or repulsion with the first fixing member 31 and the second fixing member 32. Furthermore, as the energizing current increases, it can change the position of the moving member 20, causing the moving member 20 to move closer to the first fixing member 31, thereby changing the magnitude of the damping force generated during the movement.

[0105] 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.

[0106] 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.

[0107] 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 When 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 moving member 20 and its position remain unchanged. As the energizing current increases, the moving member 20 can gradually move from its 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.

[0108] In some specific embodiments of the present invention, the first fixing member 31 and the second fixing member 32 may have the same magnetism, 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.

[0109] 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 S pole facing the first fixing member 31 and its N pole facing the second fixing member 32. This makes the magnetic force between the first fixing member 31 and the movable member 20 a pulling force, and the magnetic force between the second fixing member 32 and the movable member 20 a pushing force, allowing the movable member 20 to move closer to the first fixing member 31. Furthermore, the magnitude of the force acting on the movable member 20 can be adjusted by changing the magnitude of the current flowing through the winding 22, thereby adjusting the specific position of the movable member 20.

[0110] According to some embodiments of the present invention, the fixing member may include an iron core 21 and a winding 22 wound around the iron core 21, and the moving member 20 includes a permanent magnet.

[0111] For example, in some embodiments where the fixing members include a first fixing member 31 and a second fixing member 32, one of the first fixing member 31 and the second fixing member 32 includes an iron core 21 and a winding 22. When the winding 22 is energized, there is a magnetic force between it and the moving member 20. This magnetic force generates a pushing or pulling force, allowing the moving member 20 to move away from or towards the first fixing member 31 under the action of the magnetic force, thus achieving damping force adjustment. 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 element, a telescopic rod, or other component capable of applying a pushing or pulling force to the moving member 20; all of these are within the scope of protection of this application. Furthermore, the direction of the energized current in the winding 22 can be fixed or changed according to actual conditions.

[0112] For example, in some embodiments where the fixing member includes a first fixing member 31 and a second fixing member 32, both the first fixing member 31 and the second fixing member 32 may include an iron core 21 and a winding 22. 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; or, the first fixing member 31 and the second fixing member 32 have the same magnetic properties when the winding 22 is energized. This can create a pushing or pulling force between the fixing member and the moving member 20, thereby causing the moving member 20 to move and achieving adjustment of the flow area of ​​the restoration channel 103 or the compression channel 102.

[0113] 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 the annular groove 201 is parallel to the moving direction of the moving member 20, that is, parallel to the radial direction of the piston body 10. 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 fixed member. 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.

[0114] 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.

[0115] 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 top), 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.

[0116] The piston body 10 according to some embodiments of the present invention is described below with reference to the accompanying drawings.

[0117] In some embodiments, such as Figures 3-9 As shown, two chambers 13 corresponding to the same mounting cavity 101 are arranged along the axial direction of the piston body 10. The partition wall of the two chambers 13 is provided with a restoration communication hole 108 and a compression communication hole 109. Here, the number of restoration communication holes 108 corresponding to the same mounting cavity 101 can be one or more, and the number of compression communication holes 109 located at the same end and corresponding to the same mounting cavity 101 can be one or more.

[0118] Furthermore, the movable member 20 can divide the corresponding chamber 13 into a first chamber 106 and a second chamber 107 arranged radially along the piston body 10. That is, the first chamber 106 and the second chamber 107 are located on opposite sides of the movable member 20. The recovery channel 103 includes two first chambers 106 and a recovery connecting hole 108, and the compression channel 102 includes two second chambers 107 and a compression connecting hole 109. It should be noted that the flow area refers to the area at the smallest cross-sectional area perpendicular to the axial direction of the piston body 10, which can be the cross-sectional area at the first chamber 106 or the second chamber 107, or the cross-sectional area at the recovery connecting hole 1085 or the compression connecting hole 109.

[0119] For example, the radial projections of the compression connecting hole 109 and the restoration connecting hole 108 are both offset from the radial projection of the moving member 20. The moving member 20 can adjust the flow area by blocking the compression connecting hole 109 or the restoration connecting hole 108, or by changing the volume of the first chamber 106 and the second chamber 107.

[0120] For example, Figure 3 As shown, the distance between the far ends of the restoration communication hole 108 and the compression communication hole 109 corresponding to the same chamber 13 is less than the radial dimension of the mounting cavity 101, so that when the moving member 20 moves to different positions, it can at least partially block the compression communication hole 109, or at least partially block the restoration communication hole 108, or simultaneously block at least partially the restoration communication hole 108 and at least partially the compression communication hole 109, thereby realizing the adjustment of the flow area and the adjustment of the damping force.

[0121] In some embodiments, such as Figures 3-7 As shown, a spacer 116 is provided between the restoration connecting hole 108 and the compression connecting hole 109. The spacer 116 prevents the restoration connecting hole 108 and the compression connecting hole 109 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 restoration connecting hole 108 and the compression connecting hole 109. Thus, during the movement of the moving member 20, the compression damping force and the restoration damping force can be continuously adjusted. In other words, before the moving member 20 fully opens the restoration connecting hole 108, the blocking area of ​​the compression connecting hole 109 is gradually increasing, and the flow area of ​​the compression connecting hole 109 is gradually decreasing; before the moving member 20 fully opens the compression connecting hole 109, the blocking area of ​​the restoration connecting hole 108 is gradually increasing, and the flow area of ​​the restoration connecting hole 108 is 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.

[0122] In some embodiments, when the movable member 20 is moved to one radial end of the mounting cavity 101, for example... Figure 3 When the movable member 20 is in contact with the first fixed member 31, the movable member 20 at least partially blocks the restoration communication hole 108 and at least partially opens the compression communication hole 109. In other words, when the movable member 20 moves to the extreme position at one end along the first direction F1, it can maximize the opening degree of the flow area of ​​the compression communication hole 109 to minimize the compression damping force.

[0123] In some specific embodiments, when the movable member 20 is moved to the radial end of the mounting cavity 101 and the movable member 20 fully opens the compression communication hole 109, the compression damping force is minimized, and it is easier to adjust the compression damping force more precisely when the movable member 20 moves in the opposite direction.

[0124] In some embodiments, when the movable member 20 is moved to the radially opposite end of the mounting cavity 101, for example... Figure 3 When the movable member 20 is in contact with the second fixed member 32, the movable member 20 at least partially blocks the compression communication hole 109 and at least partially opens the restoration communication hole 108. In other words, when the movable member 20 moves to the limit position at the other end along the first direction F1, it can maximize the opening degree of the flow area of ​​the restoration communication hole 108 to minimize the restoration damping force.

[0125] In some specific embodiments, when the movable member 20 is moved to the other radial end of the mounting cavity 101 and the movable member 20 fully opens the restoration communication hole 108, the restoration damping force is minimized, and it is easier to adjust the restoration damping force more precisely when the movable member 20 moves in the opposite direction.

[0126] According to some embodiments of the present invention, such as Figures 3-9 As shown, the piston body 10 has two annular receiving cavities 111 arranged axially. The axis of each annular receiving cavity 111 extends along the axial direction of the piston body 10, and the ends of the two annular receiving cavities 111 that are far from each other are open (e.g., the upper end of the upper annular receiving cavity 111 is open, and the lower end of the lower annular receiving cavity 111 is open). Furthermore, a plurality of sector-shaped partitions 112 are provided in the annular receiving cavity 111, and a chamber 13 is formed between two adjacent sector-shaped partitions 112.

[0127] The chamber 13 is defined by multiple sector-shaped partitions 112, which facilitates control over the size of the chamber 13, making the structure of the chamber 13 more compatible with that of the movable component 20. This allows the movable component 20 to move more smoothly within the chamber 13 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 chamber 13 through end openings, making assembly easier.

[0128] For example, in some embodiments, such as Figure 6 As shown, chamber 13 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, chamber 13 can effectively guide the movement of the moving member 20 and ensure that during movement, the sides of the fan-shaped partitions 112 can contact the surface of the moving member 20, thus ensuring the sealing effect of the moving member 20 in separating the restoration channel 103 and the compression channel 102.

[0129] According to some embodiments of the present invention, such as Figures 2-9 As shown, the vibration-damping piston 1 also includes two end caps 12, which respectively cover the end openings of the two annular receiving cavities 111 to prevent the moving part 20 in the chamber 13 from coming out of the end openings, thereby improving the stability of the moving part 20. Furthermore, the end caps 12 are provided with a recovery hole 105 coaxial with the recovery communication hole 108 on the piston body 10, and a compression hole 104 coaxial with the compression communication hole 109 on the piston body 10. The recovery channel 103 also includes the recovery hole 105, and the compression channel 102 also includes the compression hole 104.

[0130] By having the restoration connecting hole 108 and restoration hole 105 coaxially aligned, and the compression connecting hole 109 and compression hole 104 coaxially aligned, the accuracy of flow area control during the movement of the moving part 20 is improved. Furthermore, the piston body 10 and cover 12 are separate, mutually cooperating parts, facilitating the machining of structures such as the chamber 13, restoration connecting hole 108, compression connecting hole 109, restoration hole 105, and compression hole 104, thus reducing the difficulty of the machining process.

[0131] In some embodiments of the present invention, such as Figures 3-7 As 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 damper 2, so that when the connecting rod 220 passes through the mounting hole, the connecting rod 220 and the damping 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 the axial center of the inner cylinder 113 and the axial center of the outer cylinder 114, so that the inner cylinder 113, the outer cylinder 114, and the connecting end wall 115 cooperate to define two annular receiving cavities 111, resulting in a simple and robust structure.

[0132] In some embodiments that include a first fixing member 31 and a second fixing member 32, the first fixing member 31 can be installed on the inner cylinder 113, and the second fixing member 32 can be installed on the outer cylinder 114, for example... Figure 3As 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.

[0133] 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 compression communication hole 109 and a recovery communication hole 108, so that the compression communication hole 109 and the recovery communication hole 108 can communicate with the cavity 13 respectively, resulting in a simple structural design and easy processing.

[0134] In some embodiments that include end cap 12, such as Figures 3-9 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.

[0135] like Figure 3 As shown, the end wall 121 seals the end opening of the annular receiving cavity 111, and the end wall 121 is provided with a compression hole 104 and a recovery hole 105, so that the compression hole 104 can be coaxial with the compression connecting hole 109, and the recovery hole 105 can be coaxial with the recovery connecting hole 108. 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 connection reliability 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.

[0136] In some specific embodiments, reference is made to Figure 3As shown, the vibration-damping piston 1 also includes a flexible element 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 element 40 is provided with protrusions that are embedded in the grooves. The flexible element 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 compression hole 104 and the compression connecting hole 109, and the coaxiality of the recovery hole 105 and the recovery connecting hole 108.

[0137] In some embodiments, such as Figures 3-9 As shown, the fastener includes an annular structure and is disposed between the fan-shaped partition 112 and the peripheral wall of the annular receiving cavity 111. The fastener structure is simpler, one fastener can cooperate with multiple moving parts 20 in multiple mounting cavities 101, and the fastener can be reliably limited by the fan-shaped partition 112 and the peripheral wall of the annular receiving cavity 111, simplifying the installation structure.

[0138] For example, in some embodiments where the fasteners include a lower fastener 31 and a second fastener 32, such as Figures 3-9 As shown, the first fixing member 31 can be an annular structure and is disposed between the fan-shaped partition 112 and the inner peripheral wall of the annular receiving cavity 112, and the second fixing member 32 can be an annular structure and is disposed between the fan-shaped partition 112 and the outer peripheral wall of the annular receiving cavity 111. For example, the first fixing member 31 is disposed between the fan-shaped partition 112 and the inner cylinder 113, and the second fixing member 32 is disposed between the fan-shaped partition 112 and the outer cylinder 114.

[0139] According to some embodiments of the present invention, such as Figures 3-9 As shown, there are multiple mounting cavities 101, which are arranged at intervals along the circumference of the piston body 10. Each mounting cavity 101 contains two moving 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.

[0140] According to some embodiments of the present invention, such as Figures 1-3As shown, the damping piston 1 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.

[0141] 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.

[0142] 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 allows for independent adjustment of the flow areas of the recovery channel 103 and the compression channel 102 of the damping piston 1, thereby generating different magnitudes of recovery damping force and compression damping force, meeting the damping requirements under more operating conditions, and improving the damping effect and the flexibility of damping force adjustment.

[0143] In some embodiments of the present invention, such as Figure 13 and Figure 14 As shown, the suspension system 100 also includes a control component 3 and a detection component. The control component 3 is connected to the damping piston 1 and can control the flow area of ​​the recovery channel 103 and the compression channel 102 of the damping piston 1. For example, in an embodiment that includes a winding 22, the control component 3 can control the energizing state of the winding 22, such as controlling whether the winding 22 is energized and the magnitude of the energizing current.

[0144] 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 flow area of ​​the recovery channel 103 and the compression channel 102 based on the detection results of the detection component.

[0145] 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.

[0146] Therefore, based on the signals received by various sensors on and off the spring, the signals enter the control component 3, and then the flow area of ​​the recovery channel 103 and the compression channel 102 is ultimately controlled through the calculation of the control strategy. For example, the output current of the winding 22 is controlled to achieve damping feedback to control the vehicle body. The damping force can be better matched with the actual state of the vehicle body, which improves the overall vehicle comfort, handling and sport performance.

[0147] The vehicle according to an embodiment of the present invention includes a suspension system 100 according to an embodiment of the present invention. Since the suspension system 100 according to an embodiment of the present invention has the aforementioned beneficial technical effects, the vehicle according to an embodiment of the present invention allows for independent adjustment of the flow areas of the recovery channel 103 and the compression channel 102 of the damping piston 1, thereby generating different magnitudes of recovery damping force and compression damping force, meeting damping requirements under more operating conditions, and improving damping effect and damping force adjustment flexibility.

[0148] like Figure 13 and Figure 14 As shown, a vehicle control method according to some specific embodiments of the present invention may include:

[0149] S1: Detect the status of shock absorber 2 and vehicle body;

[0150] 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.

[0151] 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.

[0152] It should be noted that among the multiple movable members 20 that can move along the first direction F1, the restoring damping force and the compressive damping force can be adjusted by controlling the movement of different movable members 20, or the restoring damping force can be adjusted by controlling the movement of multiple movable members 20 at the same time, and the compressive damping force can be adjusted by controlling the movement of multiple movable members 20 at the same time. All of these are within the protection scope of the present invention.

[0153] 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 at least one moving member 20 to move to increase the flow area of ​​the compression channel 102.

[0154] In other words, when the vehicle and the corresponding road condition are low-speed, single-point undulations, such as when the vehicle 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.

[0155] In some embodiments, step S2 may include: controlling at least one moving member 20 to reciprocate along a first direction F1 while maintaining the increase in the acceleration value of the damper 2 for a predetermined time.

[0156] In other words, the vehicle is traveling on a road with continuous undulations. For example, when the vehicle passes through a series of bad roads, it can travel at low, medium, or high speeds. By controlling the moving part 20 to move back and forth along the first direction F1, the size relationship between the flow areas of the restoration 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 vehicle comfort.

[0157] 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, keeping the vehicle in a relatively stable state.

[0158] In some embodiments, step S2 may include: when a steering angle is detected, controlling at least one movable member 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 at least one movable member 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.

[0159] In other words, the vehicle is traveling at low, medium, or high speeds depending on whether the road conditions are continuous or stable turns. During a turn, the vehicle will tilt to the left or right. At this time, a larger restoring damping force and a larger compressive damping force are needed on the inside and outside of the steering wheel, 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 inside of the steering wheel (e.g., the shock absorber 2 on the left side when turning left) decreases, increasing the restoring damping force; the area of ​​the compression channel 102 of the shock absorber 2 on the outside of the steering wheel (e.g., the shock absorber 2 on the right side when turning left) decreases, increasing the compressive damping force. This maintains the levelness of the entire vehicle body during the turn, reducing the degree of tilt.

[0160] It should be noted that when the vehicle is turning continuously, the shock absorber 2 on the left side alternates between the inside and outside of the steering direction due to the continuous change in 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 move back and forth along the first direction F1, and the moving part 20 of the shock absorber 2 on the right side can move back and forth 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 vehicle can have better stability in the continuous turning state.

[0161] 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.

[0162] In other words, when the vehicle is traveling at high speed, the moving part 20 is located in the middle of the mounting cavity 101, so that the restoring damping force and the compressive damping force are kept at a relatively average level. At the same time, a slightly larger compressive damping force and restoring damping force are needed to control the shaking, swaying and undulation of the vehicle body at high speed.

[0163] In some embodiments, step S2 may include: when the vehicle accelerates, controlling at least one movable member 20 of the front shock absorber 2 to move to reduce the flow area of ​​the recovery channel 103, and controlling at least one movable member 20 of the rear shock absorber 2 to move to reduce the flow area of ​​the compression channel 102.

[0164] When the vehicle 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 overall pitch angle of the vehicle. 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 hold the front of the vehicle in place and control the height of the front lift. By controlling the movement of the moving part 20 of the rear shock absorber 2, the compressive damping force can be increased to hold the rear of the vehicle in place and control the height of the rear collapse. Thus, the front and rear work together to better control the stability of the vehicle body.

[0165] In some embodiments, step S2 may include: when the vehicle decelerates, controlling at least one movable member 20 of the front shock absorber 2 to move to reduce the flow area of ​​the compression channel 102, and controlling at least one movable member 20 of the rear shock absorber 2 to move to reduce the flow area of ​​the recovery channel 103.

[0166] When a vehicle decelerates, the situation is the opposite of when it accelerates; during deceleration, the front of the vehicle will collapse and the rear will lift. By controlling and increasing the compression damping force of the front shock absorber 2 and the recovery damping force of the rear shock absorber 2, the height of the rear lifting and the height of the front collapsing can be controlled, thereby better controlling the stability of the vehicle body.

[0167] It should be noted that in the above embodiments, when the wheel angle sensor 5 and the vehicle body gyroscope sensor 7 do not detect data, the windings 22 of multiple shock absorbers 2 on the vehicle can be input with the same current to provide the same damping force.

[0168] like Figure 3 As shown, in an embodiment where the moving part 20 includes a winding 22, the first fixing part 31 and the second fixing part 32 are permanent magnets, and the magnetic force of the first fixing part 31 is less 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:

[0169] 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.

[0170] I=A1X1+B1………………………………(1)

[0171] I=A2X2+C1Y+B2…………………………(2)

[0172] I=A3X3+B3……………………(3)

[0173] I=C2Y…………………………………………(4)

[0174] A1, A2, A3, B1, B2, B3, C1, and C2 are all constants, X1 is the acceleration of shock absorber 2, X2 is the steering angle, X3 is the vehicle's pitch angle, and Y is the vehicle speed.

[0175] 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.

[0176] 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 vehicle can be in the most stable and comfortable state.

[0177] The shock absorber 2, suspension system 100, and other components and operations of the vehicle according to embodiments of the present invention are known to those skilled in the art and will not be described in detail here.

[0178] 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.

[0179] 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.

[0180] 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, The vibration damping piston has a recovery channel and a compression channel, and the flow areas of the recovery channel and the compression channel can be adjusted independently; the vibration damping piston includes: A piston body having a mounting cavity, one of the mounting cavities comprising two chambers; Each of the chambers is provided with a movable component, which cooperates with the piston body to define the recovery channel and the compression channel, wherein... The two movable parts corresponding to the same mounting cavity can move independently to independently adjust the flow area of ​​the recovery channel and the compression channel.

2. The damping piston of the damper according to claim 1, characterized in that, It also includes a fixing member, which is at least partially disposed within the mounting cavity, and a thrust or pull force is generated between the fixing member and the moving member to drive the moving member to move.

3. The damping piston of the damper according to claim 2, characterized in that, One of the fixed member and the movable member includes a winding and the other includes a permanent magnet, or both the fixed member and the movable member include windings adapted to be connected to an external power source.

4. The damping piston of the damper according to claim 3, characterized in that, The fixing component includes the permanent magnet, and the moving component includes an iron core and the winding wound around the iron core.

5. The damping piston of the damper according to claim 4, characterized in that, The fixing component includes a first fixing component and a second fixing component, one of which is the permanent magnet and the other is an elastic component. The elastic component is used to apply a spring force to the moving component in the opposite direction to the force exerted by the permanent magnet.

6. The damping piston of the damper according to claim 5, characterized in that, The elastic element is disposed between the permanent magnet and the moving element, or the elastic element is disposed on the side of the moving element facing away from the permanent magnet.

7. The damping piston of the damper according to claim 4, characterized in that, The fixing components include a first fixing component and a second fixing component respectively disposed in the recovery channel and the compression channel, wherein both the first fixing component and the second fixing component are permanent magnets.

8. The damping piston of the damper according to claim 7, characterized in that, The first fixing member and the second fixing member have opposite magnetic properties, and the magnetic forces of the first fixing member and the second fixing member are not equal to those of the moving member when the winding is energized.

9. The damping piston of the damper according to claim 7, characterized in that, The first fixing member and the second fixing member have the same magnetism.

10. The damping piston of the damper according to claim 3, characterized in that, The fixing component includes an iron core and the winding wound around the iron core, and the moving component includes a permanent magnet.

11. The damping piston of the damper according to any one of claims 4-10, 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.

12. The damping piston of the damper according to claim 2, characterized in that, Two chambers corresponding to the same mounting cavity are arranged axially along the piston body. The partition wall of the two chambers is provided with a recovery communication hole and a compression communication hole. The moving member is adapted to divide the chamber into a first chamber and a second chamber arranged radially along the piston body. The recovery channel includes two first chambers and the recovery communication hole, and the compression channel includes two second chambers and the compression communication hole.

13. The damping piston of the damper according to claim 12, characterized in that, With the movable member located at one radial end of the mounting cavity, the movable member at least partially obstructs the restoration communication hole and at least partially opens the compression communication hole; With the movable member located at the radial end of the mounting cavity, the movable member at least partially obstructs the compression communication hole and at least partially opens the restoration communication hole.

14. The damping piston of the damper according to claim 13, characterized in that, With the movable component located at one radial end of the mounting cavity, the movable component completely blocks the restoration communication hole and completely opens the compression communication hole; With the movable component located at the radial end of the mounting cavity, the movable component completely blocks the compression communication hole and fully opens the restoration communication hole.

15. The damping piston of the damper according to claim 12, characterized in that, The piston body has two annular receiving cavities arranged axially, with the ends of the two annular receiving cavities open to each other. Each annular receiving cavity is provided with a plurality of sector-shaped partitions, and the chamber is formed between two adjacent sector-shaped partitions. The vibration damping piston also includes two end caps, which respectively cover the end openings of the two annular receiving cavities, and each end cap is provided with a restoration hole coaxial with the restoration communication hole and a compression hole coaxial with the compression communication hole.

16. The damping piston of the damper according to claim 15, characterized in that, The chamber is a long strip along the radial direction, and the planes on opposite sides of two adjacent fan-shaped partitions are parallel to each other.

17. The damping piston of the damper according to claim 15, characterized in that, The piston body includes: The inner cylinder defines mounting holes for mounting the connecting rod of the shock absorber; An outer cylinder body surrounds the inner cylinder body; the fixing member is installed on the inner cylinder body and / or the outer cylinder body; and the movable member is movably disposed between the inner cylinder body and the outer cylinder body. A connecting end wall is provided, which connects the axial middle part of the inner cylinder and the axial middle part of the outer cylinder. The connecting end wall is provided with the compression communication hole and the restoration communication 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.

18. The damping piston of the damper according to claim 15, 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 end opening and is provided with the compression hole and the 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 two cover peripheral walls and the piston body. The outer peripheral surfaces of the cover peripheral walls and the outer peripheral surfaces of the piston body are provided with grooves, and the flexible component is provided with protrusions that are embedded in the grooves.

19. The damping piston of the damper according to claim 15, characterized in that, The fastener includes an annular structure and is disposed between the fan-shaped partition and the peripheral wall of the annular receiving cavity.

20. The damping piston of the damper according to claim 1, characterized in that, The mounting cavities are multiple and are arranged at intervals along the circumference of the piston body.

21. A vibration damper, characterized in that, The device includes a cylinder, a connecting rod, and a damping piston according to any one of claims 1-20. 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.

22. The vibration damper according to claim 21, characterized in that, Also includes: A first one-way valve plate is disposed in the recovery channel and is used to make the recovery channel unidirectionally open; The 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.

23. A suspension system, characterized in that, Includes the vibration damper according to claim 21 or 22.

24. The suspension system according to claim 23, characterized in that, The suspension system also includes: A control component, which is connected to the vibration damping piston; 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 flow area of ​​the recovery channel and the compression channel based on the detection result of the detection component.

25. A vehicle, characterized in that, Includes the suspension system according to claim 23 or 24.

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