Damper piston, damper and suspension system

Abstract

The application discloses a shock absorber piston, a shock absorber and a suspension system, and the shock absorber piston comprises a piston body provided with a mounting cavity; a moving part movably mounted in the mounting cavity and matched with the piston body to define a recovery passage and a compression passage respectively located on two sides of the moving part; a fixing part and an elastic part, the fixing part is arranged in the recovery passage or the compression passage, the fixing part and / or the moving part comprises a winding, and a magnetic force exists between the fixing part and the moving part in a state that the winding is electrified; the elastic part applies an elastic force to the moving part, the elastic force is opposite to the magnetic force, the moving part is moved to adjust flow areas of the recovery passage and the compression passage. According to the shock absorber piston, the recovery damping force and the compression damping force with different sizes can be formed, the shock absorbing demand under more working conditions can be met, the moving part, the fixing part and the elastic part have no influence on the appearance of the piston body, the production cost is reduced, the structure is simplified, and the shock absorber piston has the advantages of simple structure, low cost and the like.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicles, and more particularly to a damping piston of a shock absorber, a shock absorber and a suspension system. BACKGROUND

[0002] In the related art, the shock absorber is passive damping, and damping is generated by a connecting rod piston combination, an outer cylinder, a bottom valve and damping oil to provide the energy required for damping. However, a fixed structure shock absorber can only provide a single and unique damping force, and cannot cope with complex driving conditions of the vehicle and complex excitation of the ground, resulting in the inability to meet the higher requirements for vehicle comfort and performance. SUMMARY

[0003] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, one object of the present application is to provide a damping piston of a shock absorber, which can adjust the size of the damping force and is low in cost and small in overall space occupation.

[0004] Another object of the present application is to provide a shock absorber having the above-mentioned damping piston.

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

[0006] The damping piston of a shock absorber according to an embodiment of the present application comprises: a piston body having a mounting cavity; a moving piece movably mounted in the mounting cavity and cooperating with the piston body to define a rebound passage and a compression passage, the rebound passage and the compression passage being located on opposite sides of the moving piece; a fixed piece and an elastic piece, the fixed piece and the elastic piece being mounted on the piston body, the fixed piece being provided in one of the rebound passage and the compression passage, wherein at least one of the fixed piece and the moving piece comprises a winding, there being a magnetic force between the fixed piece and the moving piece in a powered state of the winding, the elastic piece being used to apply an elastic force to the moving piece in a direction opposite to the magnetic force, the moving piece moving away from or close to the fixed piece under the action of the magnetic force and the elastic force to adjust the flow area of the rebound passage and the compression passage.

[0007] The damping piston of the damper according to the embodiments of the present application drives the moving part to move by the cooperation of magnetic force and elastic force, so that the flow areas of the recovery passage and the compression passage are adjustable, thereby forming recovery damping forces and compression damping forces of different sizes to meet the damping requirements in more working conditions and improve the damping effect. The moving part, the fixed part and the elastic part have no influence on the appearance of the piston body, so the appearance structure of the damping piston and the structures of other matching parts on the damper can be unchanged, which is beneficial to reducing the production cost, simplifying the structure, ensuring the movement space stroke of the damping piston, and the damping piston has the advantages of simple structure, low cost and the like.

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

[0009] According to some embodiments of the present application, the elastic part is arranged between the fixed part and the moving part, or the elastic part is arranged on the side of the moving part away from the fixed part.

[0010] According to some embodiments of the present application, the fixed part is a permanent magnet, and the moving part includes an iron core and a winding arranged on the iron core.

[0011] According to some embodiments of the present application, the iron core is provided with an annular groove, the axis of the annular groove is parallel to the moving direction of the moving part, and the winding is embedded in the annular groove.

[0012] According to some embodiments of the present application, the moving part is correspondingly provided with a plurality of elastic parts, and the plurality of elastic parts are arranged in an interval along the axial direction of the piston body.

[0013] According to some embodiments of the present application, the piston body has an annular accommodating cavity, one end of the piston body is provided with a first recovery hole and a first compression hole, the other end of the piston body is provided with an open end of the annular accommodating cavity, a plurality of fan-shaped partition parts are arranged in the annular accommodating cavity, and the installation cavity is formed between two adjacent fan-shaped partition parts.

[0014] According to some embodiments of the present application, the elastic part is arranged in the other one of the recovery passage and the compression passage, in the state that the moving part abuts against the fixed part, the moving part at least partially blocks the first recovery hole and at least partially opens the first compression hole; in the state that the moving part is farthest away from the fixed part, the moving part at least partially blocks the first compression hole and at least partially opens the first recovery hole.

[0015] According to some embodiments of the present application, when the moving part abuts against the fixed part, the moving part completely blocks the first restoring hole and completely opens the first compression hole; when the moving part is at the maximum distance from the fixed part, the moving part completely blocks the first compression hole and completely opens the first restoring hole.

[0016] According to some embodiments of the present application, the mounting cavity is radially long strip-shaped, and the planes where the opposite sides of the two adjacent fan-shaped partition parts are located are parallel to each other.

[0017] According to some embodiments of the present application, the piston body comprises: an inner cylinder body defining a mounting hole for mounting a connecting rod of the shock absorber; an outer cylinder body arranged around the inner cylinder body, the fixed part being mounted on one of the inner cylinder body and the outer cylinder body, and the elastic part being arranged between the other one of the inner cylinder body and the outer cylinder body and the moving part; a connecting end wall connecting an axial end of the inner cylinder body and an axial end of the outer cylinder body, the connecting end wall being provided with the first compression hole and the first restoring hole, and the fan-shaped partition part being located in the annular accommodating cavity between the inner cylinder body and the outer cylinder body and connected to the connecting end wall.

[0018] According to some embodiments of the present application, the fixed part is annular in structure and arranged between the fan-shaped partition part and the peripheral wall of the annular accommodating cavity.

[0019] According to some embodiments of the present application, the shock absorber piston further comprises an end cover, the end cover covering the open hole, and the end cover being provided with a second restoring hole opposite the first restoring hole on the piston body and a second compression hole opposite the first compression hole on the piston body, the first restoring hole and the second restoring hole being in communication through the restoring channel, and the first compression hole and the second compression hole being in communication through the compression channel.

[0020] According to some embodiments of the present application, the end cover comprises a cover end wall and a cover peripheral wall, the cover end wall being connected to an axial end of the cover peripheral wall, the cover end wall covering the open hole and being provided with the compression hole and the restoring hole, and the cover peripheral wall being sleeved on the piston body, the shock absorber piston further comprising a flexible part, the flexible part being sleeved on the connection between the cover peripheral wall and the piston body, an outer peripheral surface of the cover peripheral wall and an outer peripheral surface of the piston body being provided with grooves, and the flexible part being provided with protrusions embedded in the grooves.

[0021] According to some embodiments of the present application, the moving part is a plurality of moving parts, the plurality of moving parts being arranged at intervals along the circumference of the piston body, and the mounting cavity being arranged in one-to-one correspondence with the moving parts.

[0022] The damper according to an embodiment of the present application comprises a cylinder, a connecting rod, and a damping piston according to an embodiment of the present application, the damping piston being arranged in the cylinder and sealingly fitted with the inner circumferential surface of the cylinder, the connecting rod being connected with the damping piston, and the connecting rod and the damping piston being movable along the axial direction of the cylinder.

[0023] According to some embodiments of the present application, the damper further comprises a first one-way valve plate arranged in the rebound passage and used for allowing the rebound passage to be unidirectionally open; and a second one-way valve plate arranged in the compression passage and used for allowing the compression passage to be unidirectionally open, the opening directions of the rebound passage and the compression passage being opposite.

[0024] The suspension system according to an embodiment of the present application comprises the damper according to an embodiment of the present application.

[0025] According to some embodiments of the present application, the suspension system further comprises a control assembly connected with the winding, and a detection assembly comprising at least one of a vibration acceleration sensor, a wheel rotation angle sensor, a throttle opening degree sensor, a gyroscope sensor, and a wheel speed sensor, the detection assembly being connected with the control assembly, and the control assembly being used for controlling the energization state of the winding according to the detection result of the detection assembly.

[0026] Additional aspects and advantages of the present application will be given, partially in the following description, partially become obvious from the following description, or be understood by practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0027] The above and / or additional aspects and advantages of the present application will become apparent and be readily understood from the following description, taken in conjunction with the accompanying drawings, in which:

[0028] Figure 1 is a schematic view of a damper according to an embodiment of the present application;

[0029] Figure 2 is a schematic view of a partial structure of a damper according to an embodiment of the present application;

[0030] Figure 3 is a schematic view of a damping piston according to an embodiment of the present application;

[0031] Figure 4 is an exploded view of a partial structure of a damper according to an embodiment of the present application;

[0032] Figure 5 is a top view of a piston body according to an embodiment of the present application;

[0033] Figure 6 is a bottom view of an end cover according to an embodiment of the present application;

[0034] Figure 7 is a schematic diagram of a damping adjustable range of a shock absorber according to an embodiment of the present application, V represents a velocity of the shock absorber, and F represents a damping force;

[0035] Figure 8 is a schematic diagram of a damping of a shock absorber according to an embodiment of the present application, wherein the partition is in the middle of the installation cavity;

[0036] Figure 9 is a schematic diagram of a damping of a shock absorber according to an embodiment of the present application, wherein the partition is in the middle of the installation cavity;

[0037] Figure 10 is a control schematic diagram of a suspension system according to an embodiment of the present application;

[0038] Figure 11 is a schematic diagram of a suspension system according to an embodiment of the present application.

[0039] Reference signs:

[0040] suspension system 100; control assembly 3; vibration acceleration sensor 4; wheel rotation angle sensor 5; accelerator opening degree sensor 6; gyroscope sensor 7; wheel speed sensor 8;

[0041] shock absorber 2; cylinder 210; connecting rod 220; guide sealing assembly 230; floating sealing piston 240;

[0042] shock absorbing piston 1;

[0043] piston body 10; installation cavity 101; compression passage 102; recovery passage 103; first compression hole 104a; second compression hole 104b; first recovery hole 105a; second recovery hole 105b; annular accommodating cavity 111; fan-shaped partition 112; inner cylinder body 113; outer cylinder body 114; connecting end wall 115; spacing part 116; end cover 12; cover end wall 121; cover peripheral wall 122;

[0044] moving part 20; core 21; annular groove 201; winding 22;

[0045] fixed part 31; elastic part 32;

[0046] flexible part 40; first one-way valve 41; second one-way valve 42;

[0047] power line 50;

[0048] first direction F1; second direction F2. DETAILED DESCRIPTION

[0049] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0050] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0051] In the description of the present invention, "first feature" and "second feature" may include one or more such features, "plurality" means two or more, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or the first and second features not being in direct contact but being in contact through another feature between them, the first feature being "above", "above" and "above" the second feature includes the first feature being directly above and diagonally above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0052] The damper piston 1 of the shock absorber 2 and the shock absorber 2 according to the embodiment of the present invention will be described below with reference to the accompanying drawings. The shock absorber 2 according to the embodiment of the present invention includes the damper piston 1 of the shock absorber 2 according to the embodiment of the present invention.

[0053] Reference Figure 1 and Figure 2 As shown, a shock absorber 2 according to some embodiments of the present invention includes: a cylinder 210, a connecting rod 220, and a shock absorbing piston 1 according to an embodiment of the present invention. The shock absorbing piston 1 is located within the cylinder 210 and is sealed against the inner circumferential surface of the cylinder 210. The connecting rod 220 extends into the cylinder 210. The shock absorbing piston 1 is connected to the connecting rod 220 so that the connecting rod 220 and the shock absorbing piston 1 can move axially along the cylinder 210 to generate compression damping force and restoring damping force (i.e., tensile damping force), thereby achieving a vibration reduction effect.

[0054] In some embodiments, as Figure 1As shown, the shock absorber 2 can further include a guide sealing assembly 230 sealing a gap between the connecting rod 220 and the cylinder tube 210, and a floating sealing piston 240 arranged in the cylinder tube 210 and located on a side of the shock piston 1 away from the connecting rod 220.

[0055] With reference to Figures 1-6 As shown, the shock piston 1 of the shock absorber 2 according to the embodiment of the present application can include a piston body 10, a moving part 20, a fixed part 31 and an elastic part 32 (e.g. a spring or a spring sheet).

[0056] Specifically, the piston body 10 has a mounting cavity 101. The moving part 20 is movably mounted in the mounting cavity 101, and the moving part 20 cooperates with the piston body 10 to define a rebound passage 103 and a compression passage 102. The rebound passage 103 and the compression passage 102 are respectively located on two sides of the moving part 20 opposite to each other, for example Figure 3 As shown, the rebound passage 103 and the compression passage 102 are respectively located on two sides of the moving part 20 along the first direction F1. The fixed part 31 and the elastic part 32 are both mounted on the piston body 10, for example, the fixed part 31 can be located in one of the rebound passage 103 and the compression passage 102.

[0057] The setting position of the elastic part 32 can be flexibly set, for example, the elastic part 32 can be arranged between the fixed part 31 and the moving part 20, in other words, the elastic part 32 and the fixed part 31 are arranged on the same side of the moving part 20, so as to make the structure compact; for another example, the elastic part 32 can be arranged on a side of the moving part 20 away from the fixed part 31, in other words, the elastic part 32 and the fixed part 31 are respectively arranged on two sides of the moving part 20 opposite to each other, so as to make the setting position of the elastic part 32 and the fixed part 31 not interfere with each other, facilitating assembly and fixation.

[0058] Among them, at least one of the fixed part 31 and the moving part 20 includes a winding 22, under the energized state of the winding 22, there is a magnetic force between the fixed part 31 and the moving part 20, the elastic part 32 is used to apply an elastic force opposite to the direction of the magnetic force to the moving part 20, the moving part 20 can move away from or close to the fixed part 31 under the action of the magnetic force and the elastic force, for example, move along the first direction F1, so as to adjust the flow area of the rebound passage 103 and the compression passage 102.

[0059] Specifically, during the damping process of the shock absorber 2, the rebound damping force can be generated by the shock oil flowing through the rebound passage 103, and the compression damping force can be generated by the shock oil flowing through the compression passage 102.

[0060] The fixed member 31 and the movable member 20 may both include the winding 22, or one of them may include the winding 22 and the other may include a magnetic member. The magnetic member is a component that can generate a magnetic field or be attracted by magnetic force. For example, the magnetic member may be a permanent magnet, an electromagnet, or an iron block. For example, when the winding 22 is energized, it can generate a magnetic field, and the strength of the magnetic field can vary with the current flowing through it, thereby changing the attractive force or repulsive force between the winding 22 and the magnetic member.

[0061] The recovery channel 103 and the compression channel 102 are located on opposite sides of the moving member 20. For example, the first direction F1 can be as follows: Figure 3 The restoration channel 103 may be located outside the moving member 20 and the compression channel 102 may be located inside the moving member 20 , or the restoration channel 103 may be located inside the moving member 20 and the compression channel 102 may be located outside the moving member 20 .

[0062] Below, this article will Figure 3 The description is given by taking the example that the restoration channel 103 is located on the inner side of the moving part 20 and the compression channel 102 is located on the outer side of the moving part 20, the fixed part 31 is located on the restoration channel 103 and the elastic part 32 is located on the compression channel 102. According to the following description, it can also be understood that the restoration channel 103 is located on the outer side of the moving part 20 and the compression channel 102 is located on the inner side of the moving part 20, the fixed part 31 is located on the compression channel 102 and the elastic part 32 is located on the restoration channel 103.

[0063] Because restoration passage 103 and compression passage 102 are positioned respectively at the two sides that moving part 20 is opposite to each other, and fixed member 31 and elastic member 32 are respectively located at restoration passage 103 and compression passage 102, fixed member 31 and elastic member 32 are positioned respectively at both sides of moving part 20 along first direction F1, that is, fixed member 31 and elastic member 32 are positioned respectively at both sides of moving part 20 along first direction F1. Elastic member 32 can produce elastic force to moving part 20, for example thrust or pulling force. After winding 22 is energized, fixed member 31 can produce magnetic force to moving part 20, and the magnetic force action direction is opposite to the elastic force action direction. For example, elastic member 32 applies thrust to moving part 20, and fixed member 31 and moving part 20 repel each other to apply the action force towards elastic member 32 directions to moving part 20.

[0064] As the current in winding 22 changes, the magnetic force changes, allowing movable member 20 to reciprocate along first direction F1. When movable member 20 moves outward, the flow area of ​​compression channel 102 decreases, while the flow area of ​​restoration channel 103 increases. This corresponds to an increase in compression damping force and a decrease in restoration damping force. When movable member 20 moves inward, the flow area of ​​compression channel 102 increases, while the flow area of ​​restoration channel 103 decreases. This corresponds to a decrease in compression damping force and an increase in restoration damping force.

[0065] thus, Figure 7 The two solid curves in the middle represent the state where the compression damping force is minimum and the restoring damping force is maximum, and the two dotted curves represent the state where the compression damping force is maximum and the restoring damping force is minimum. Figure 7 The illustrated area a represents the adjustable range of the compression damping force, and the illustrated area b represents the adjustable range of the restoring damping force. Figure 8 The two curves in the middle represent the compression damping force and the restoring damping force when the moving member 20 is located in the middle of the installation space along the first direction F1.

[0066] During actual application, the movable part 20 can adaptively move inward or outward along the first direction F1 according to the variable driving conditions of the suspension system 100 and the complex excitation conditions of the ground to adjust the magnitude of the restoring damping force and the compression damping force provided, thereby greatly improving the comfort and movement performance of the suspension system 100.

[0067] For example, Figure 3 In the example shown, the movable member 20 moves inward to the extreme position, and the compression hole 104 is fully opened. At this time, the vibration damping oil flows most smoothly in the compression channel 102, and the compression damping force is minimized, which is suitable for the comfort requirements of the entire vehicle. The movable member 20 moves outward to the extreme position, and the restoration hole 105 is fully opened. At this time, the vibration damping oil flows most smoothly in the restoration channel 103, the restoration damping force is minimized, and the compression damping force is maximized, which is suitable for the control and sports performance requirements of the entire vehicle. When the movable member 20 is close to the middle position of the mounting cavity 101, both the restoration and compression are at a relatively intermediate level, which is suitable for the sense of control and smoothness at higher vehicle speeds.

[0068] like Figure 9 The diagram shows vibration damping for a vibration damper 2 according to an embodiment of the present application and a passive vibration damper in the related art (i.e., a comparative example). The horizontal axis represents time, and the vertical axis represents vibration. As can be seen from the diagram, the vibration damper 2 according to the embodiment of the present application can adjust the current in the winding 22 to change the position of the moving element 20 according to the actual vibration. This adjusts the flow rate of the damping oil during circulation, generating different damping forces and achieving faster vibration damping.

[0069] In some related technologies, variable damping force is generated by adding one or two devices with throttling effect on the basis of the passive shock absorber, that is, multiple shock-absorbing pistons are superimposed, or other throttling devices are added outside the shock-absorbing piston. The overall structure is too complicated, the overall space occupied is large, and the development cost is high.

[0070] In the embodiment of the present application, the damping force can be adjusted by changing the structure of the damping piston 1 without adding new throttling devices. Since the moving part 20, the fixed part 31 and the elastic part 32 are all arranged in the piston body 10, the appearance of the damping piston 1 is not affected, and thus the structure of other components (such as the cylinder 210 and the connecting rod 220) cooperating with the damping piston 1 is not affected, so that the size chain relationship of the whole product is not affected, the damping piston 1 does not occupy too much space in the cylinder 210, and thus the movement space of the damping piston 1 in the cylinder 210 is larger, and better damping effect can be achieved.

[0071] In addition, the elastic part 32 has small volume and light weight, the elastic force is provided by the elastic part 32, the weight and cost can be reduced, and the magnetic force is generated only between the fixed part 31 and the moving part 20, so that the current size is controlled more simply and the adjustment precision is higher when the current is adjusted to increase the magnetic force and adjust the position of the moving part 20.

[0072] The damping piston 1 of the damper 2 according to the embodiment of the present application is driven to move by the magnetic force and the elastic force, the flow areas of the recovery passage 103 and the compression passage 102 are adjustable, different sizes of recovery damping force and compression damping force are formed, the damping demand under more working conditions is met, the damping effect is improved, the moving part 20, the fixed part 31 and the elastic part 32 do not affect the appearance of the piston body 10, the appearance structure of the damping piston 1 and the structures of other cooperating components of the damper 2 do not need to be changed, the production cost is reduced, the structure is simplified, the movement space of the damping piston 1 is ensured, and the damping piston 1 has the advantages of simple structure and low cost.

[0073] The damping piston 1 of the damper 2 according to the embodiment of the present application is driven to move by the magnetic force and the elastic force, the flow areas of the recovery passage 103 and the compression passage 102 are adjustable, different sizes of recovery damping force and compression damping force are formed, the damping demand under more working conditions is met, the damping effect is improved, the moving part 20, the fixed part 31 and the elastic part 32 do not affect the appearance of the piston body 10, the appearance structure of the damping piston 1 and the structures of other cooperating components of the damper 2 do not need to be changed, the production cost is reduced, the structure is simplified, the movement space of the damping piston 1 is ensured, and the damping piston 1 has the advantages of simple structure and low cost.

[0074] It should be noted that in the embodiment of the present application, one of the fixed part 31 and the moving part 20 can include the winding 22, or both of the magnetic parts can include the winding 22.

[0075] One of them includes the winding 22 to simplify the circuit connection more favorably. For example, in some embodiments, as shown in Figures 2-4 The fixed part 31 is a permanent magnet, and the moving part 20 includes the winding 22. That is, the magnetic field of the fixed part 31 is fixed, and the magnetic field of the moving part 20 is adjustable in size. Not only simplifies the circuit, but also makes the current size adjustment more easily controlled.

[0076] In addition, in the embodiment in which the elastic part 32 exerts a pushing force on the moving part 20, for example, the elastic part 32 is a compression spring, in the state in which the winding 22 is not electrified, there is no force between the moving part 20 and the fixed part 31 or the two are attracted to each other. The elastic part 32 exerts a pushing force on the moving part 20 towards the fixed part 31, so that the moving part 20 can move in the first direction F1 to a limit position closer to the fixed part 31, that is, the initial position of the moving part 20 is the limit position of the movement, such as abutting against the fixed part 31. After the winding 22 is electrified, the winding 22 itself has magnetism, and the moving part 20 and the fixed part 31 can generate a repulsive force, and as the electrified current increases, the repulsive force increases, and the position of the moving part 20 can be changed so that the moving part 20 moves in the direction close to the elastic part 32, thereby changing the size of the damping force generated during the movement.

[0077] Therefore, after the winding 22 is electrified, it is convenient to more accurately adjust the position of the moving part 20 and the size of the damping force according to the initial position of the moving part 20 and the size of the electrified current.

[0078] In some embodiments of the present application, as shown in Figure 3 The iron core 21 is provided with an annular groove 201, and the axis of the annular groove 201 is parallel to the moving direction of the moving part 20, and the winding 22 is embedded in the annular groove 201. On the one hand, the winding 22 is arranged in a ring shape in the annular groove 201, which is convenient for accurately forming N and S poles arranged in the first direction F1, and ensuring the size of the force between the moving part 20 and the fixed part 31; on the other hand, the annular groove 201 can limit the winding 22, avoiding the winding 22 from falling off during the reciprocating movement of the moving part 20 and affecting the adjustment of the damping force.

[0079] In some specific embodiments, continuing to refer to Figure 3 As shown, the annular groove 201 can be provided with a stop edge to make the width of the slot (such as the size shown in the up-down direction in Figure 3 The width of the annular groove 201 (such as the size shown in the up-down direction in Figure 3 The stop edge can further prevent the winding 22 from falling out of the slot of the annular groove 201, and the anti-falling effect is better.

[0080] In some specific embodiments, as shown in Figure 2 and Figure 3As shown, the power supply line 50 of the winding 22 can be led out from any position on the circumference of the annular groove 201, for example, can be led out from the end of the annular groove 201 along the second direction F2 (as shown by the lower end), and correspondingly, the groove wall of the annular groove 201 can be provided with a wiring groove for accommodating the power supply line 50, and the piston body 10 can be provided with a wire hole for the power supply line 50 to pass through, so as to avoid that the power supply line 50 moves greatly during the movement of the moving member 20 and affects the stability of the electrical connection. Figure 3 As shown, the power supply line 50 of the winding 22 can be led out from any position on the circumference of the annular groove 201, for example, can be led out from the end of the annular groove 201 along the second direction F2 (as shown by the lower end), and correspondingly, the groove wall of the annular groove 201 can be provided with a wiring groove for accommodating the power supply line 50, and the piston body 10 can be provided with a wire hole for the power supply line 50 to pass through, so as to avoid that the power supply line 50 moves greatly during the movement of the moving member 20 and affects the stability of the electrical connection.

[0081] In embodiments of the present application, one elastic member 32 can be provided for each moving member 20 to simplify the structure, and multiple elastic members 32 can also be provided for each moving member 20 to improve the stability and strength of the elastic force on the moving member 20, for example, the multiple elastic members 32 can be arranged at intervals along the axial direction of the piston body 10 to improve the uniformity of the force on the moving member 20.

[0082] The piston body 10 according to some embodiments of the present application will be described below with reference to the accompanying drawings.

[0083] According to some embodiments of the present application, as shown in the drawings, Figures 3-6 The piston body 10 has an annular accommodating cavity 111, and an axial end (the axial direction of the piston body 10 is as shown in the second direction F2, and the axial end is as shown in the lower end) of the piston body 10 is provided with a first recovery hole 105a and a first compression hole 104a, and the other axial end (as shown in the upper end) of the piston body 10 is provided with an open end of the annular accommodating cavity 111. Moreover, multiple fan-shaped partition portions 112 are arranged in the annular accommodating cavity 111, and an installation cavity 101 is formed between two adjacent fan-shaped partition portions 112, and the cavity bottom wall of the installation cavity 101 is provided with the first recovery hole 105a and the first compression hole 104a. Figure 3 Figure 3 The piston body 10 has an annular accommodating cavity 111, and an axial end (the axial direction of the piston body 10 is as shown in the second direction F2, and the axial end is as shown in the lower end) of the piston body 10 is provided with a first recovery hole 105a and a first compression hole 104a, and the other axial end (as shown in the upper end) of the piston body 10 is provided with an open end of the annular accommodating cavity 111. Moreover, multiple fan-shaped partition portions 112 are arranged in the annular accommodating cavity 111, and an installation cavity 101 is formed between two adjacent fan-shaped partition portions 112, and the cavity bottom wall of the installation cavity 101 is provided with the first recovery hole 105a and the first compression hole 104a. Figure 3

[0084] The installation cavity 101 is defined by the multiple fan-shaped partition portions 112, which facilitates the control of the size of the installation cavity 101, makes the installation cavity 101 more matched with the structure of the moving member 20, and makes the moving member 20 move more smoothly in the installation cavity 101, and ensures the cooperation area between the moving member 20 and the fan-shaped partition portions 112, so as to ensure that the compression channel 102 and the recovery channel 103 are not connected during the movement of the moving member 20. Moreover, the moving member 20 can be installed into the installation cavity 101 through the open end, and the assembly is easier.

[0085] For example, in some embodiments, as shown in the drawings, Figure 5 ​​As shown, the mounting cavity 101 is radially long strip-shaped, and the planes where the opposite sides of the two adjacent sector partition portions 112 are located are parallel to each other. In this way, the mounting cavity 101 can well guide the movement of the moving member 20, and ensure that the side of the sector partition portion 112 can be in surface contact with the moving member 20 during movement, so as to ensure the sealing effect of the moving member 20 on the separation of the recovery channel 103 and the compression channel 102.

[0086] It should be noted that the number of the first recovery holes 105a corresponding to the same mounting cavity 101 can be one or more, and the number of the first compression holes 104a corresponding to the same mounting cavity 101 can be one or more.

[0087] In addition, the moving member 20 can separate the mounting cavity 101 into the compression channel 102 and the recovery channel 103 arranged along the first direction F1. That is, the compression channel 102 and the recovery channel 103 are respectively located on the two sides of the moving member 20 along the first direction F1. The recovery channel 103 is in communication with the first recovery hole 105a, and the compression channel 102 is in communication with the first compression hole 104a. The second direction F2 intersects the first direction F1. It should be noted that the flow area refers to the area at the smallest cross-sectional area perpendicular to the second direction F2, which can be the cross-sectional area of the compression channel 102 and the recovery channel 103, or the cross-sectional area of the first recovery hole 105a or the first compression hole 104a.

[0088] The projection of the first recovery hole 105a along the first direction F1 and the projection of the first compression hole 104a along the first direction F1 are staggered with the projection of the moving member 20 along the first direction F1. The moving member 20 can adjust the flow area by shielding the first recovery hole 105a or the first compression hole 104a, or can adjust the flow area by changing the volume of the compression channel 102 and the recovery channel 103.

[0089] For example, as shown in FIG. 1, the moving member 20 can be a piston. Figure 3 As shown, the distance between the mutually distant ends of the first recovery hole 105a and the first compression hole 104a at the same end is less than the size of the mounting cavity 101 along the first direction F1, so that when the moving member 20 moves to different positions, at least part of the recovery hole 105 can be shielded, or at least part of the compression hole 104 can be shielded, or at least part of the recovery hole 105 and at least part of the compression hole 104 can be shielded at the same time. In this way, the flow area adjustment and the damping force adjustment are realized.

[0090] In some embodiments, as shown in FIG. 1, the moving member 20 can be a piston. Figure 3As shown, a spacing portion 116 is arranged between the first restoring hole 105a and the first compression hole 104a, the spacing portion 116 makes the first restoring hole 105a and the first compression hole 104a not communicate with each other, and the radial dimension of the moving member 20 is greater than the radial dimension of the spacing portion 116, so that during the movement of the moving member 20, the moving member 20 will inevitably at least partially block at least one of the first restoring hole 105a and the first compression hole 104a. Thus, the uninterrupted adjustment of the compression damping force and the restoring damping force can be realized during the movement of the moving member 20; in other words, before the moving member 20 completely opens the first restoring hole 105a, the blocking area of the first compression hole 104a has been gradually increasing, and the flow area of the first compression hole 104a has been gradually decreasing; before the moving member 20 completely opens the first compression hole 104a, the blocking area of the first restoring hole 105a has been gradually increasing, and the flow area of the first restoring hole 105a has been gradually decreasing. Thus, the situation that the compression damping force and the restoring damping force are both unchanged during the movement of the moving member 20 is avoided, which leads to the unclear movement of the moving member 20 to realize the required damping force adjustment.

[0091] According to some embodiments of the present application, as Figures 2-6 As shown, the shock absorber piston 1 further comprises an end cover 12, the end cover 12 covers the open mouth of the annular accommodating cavity 111 to prevent the moving member 20 in the mounting cavity 101 from being detached from the open mouth, and the stability of the movement of the moving member 20 is improved. Moreover, the end cover 12 is provided with a second restoring hole 105b coaxial with the first restoring hole 105a on the piston body 10, and a second compression hole 104b coaxial with the first compression hole 104a on the piston body 10. The first restoring hole 105a and the second restoring hole 105b are communicated through the restoring channel 103, and the first compression hole 104a and the second compression hole 104b are communicated through the compression channel 102.

[0092] By coaxially arranging the first restoring hole 105a and the second restoring hole 105b, and coaxially arranging the first compression hole 104a and the second compression hole 104b, the accuracy of the flow area control during the movement of the moving member 20 is improved. Moreover, the piston body 10 and the end cover 12 are separate parts matched with each other, which facilitates the machining of the structures such as the mounting cavity 101, the first restoring hole 105a, the second restoring hole 105b, the first compression hole 104a, and the second compression hole 104b, and reduces the difficulty of the machining process.

[0093] In some embodiments, in the state that the moving member 20 abuts against the fixed member 31, the moving member 20 at least partially blocks the first restoring hole 105a and at least partially opens the first compression hole 104a. In other words, when the moving member 20 moves to the limit position at one end along the first direction F1, the opening degree of the flow area of the first compression hole 104a is as large as possible, so as to reduce the compression damping force as much as possible.

[0094] In some specific embodiments, when the moving part 20 abuts against the fixed part 31, the moving part 20 completely opens the first compression hole 104a and completely blocks the first recovery hole 105a, the compression damping force is minimum, the recovery damping force is maximum, and it is convenient to more accurately adjust the compression damping force and the recovery damping force when the moving part 20 moves reversely.

[0095] In some embodiments, when the distance between the moving part 20 and the fixed part 31 is maximum, i.e., when the compression amount of the elastic part 32 is maximum, the moving part 20 at least partially blocks the compression hole 104 and at least partially opens the recovery hole 105. In other words, the moving part 20 at least partially blocks the first compression hole 104a and at least partially opens the first recovery hole 105a. In other words, when the moving part 20 moves to the limit position of the other end along the first direction F1, the opening degree of the flow area of the first recovery hole 105a can be made as large as possible to reduce the recovery damping force as much as possible.

[0096] In some specific embodiments, when the distance between the moving part 20 and the fixed part 31 is maximum, the moving part 20 completely opens the first recovery hole 105a and completely blocks the first compression hole 104a, the recovery damping force is minimum, the compression damping force is maximum, and it is convenient to more accurately adjust the recovery damping force and the compression damping force when the moving part 20 moves reversely.

[0097] In some embodiments of the present application, as shown in Figures 3-5 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 can be connected to the damping piston 1 and can move synchronously. The outer cylinder 114 is arranged around the inner cylinder 113, and the connecting end wall 115 connects the axial end of the inner cylinder 113 and the axial end of the outer cylinder 114, so that the inner cylinder 113, the outer cylinder 114, and the connecting end wall 115 cooperatively define an annular accommodating cavity 111, which is simple in structure and firm.

[0098] The fixed part 31 can be mounted on one of the inner cylinder 113 and the outer cylinder 114, and the elastic part 32 can be arranged between the other one of the inner cylinder 113 and the outer cylinder 114 and the moving part 20. For example Figure 3 As shown in

[0099] The fan-shaped partition 112 is located in the annular accommodating cavity 111 between the inner cylinder body 113 and the outer cylinder body 114, and is connected with the connecting end wall 115. The moving part 20 is movably arranged between the inner cylinder body 113 and the outer cylinder body 114, and is located between two adjacent fan-shaped partitions 112. The two fan-shaped partitions 112 can limit the moving direction of the moving part 20, and the inner cylinder body 113 and the outer cylinder body 114 can limit the moving stroke of the moving part 20, so that the process of adjusting the compression damping force and the recovery damping force of the moving part 20 is more easily controlled. In addition, the connecting end wall 115 is provided with the first compression hole 104a and the first recovery hole 105a, so that the first compression hole 104a and the first recovery hole 105a are respectively communicated with the mounting cavity, and the structure design is simple and easy to process.

[0100] In some embodiments including the end cover 12, as shown in Figure 3 and Figure 6 , the end cover 12 includes a cover end wall 121 and a cover peripheral wall 122, and the cover end wall 121 is connected with an axial end of the cover peripheral wall 122. Among them, the cover end wall 121 can be 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 cover 12 can include a peripheral wall connected with the inner periphery of the cover end wall 121, which is used to cooperate with the inner cylinder body 113 of the piston body 10, and the end cover 12 can also not include the peripheral wall, as long as it meets the requirement that the end cover 12 can be reliably connected with the piston body 10.

[0101] As shown in Figure 3 , the cover end wall 121 covers the open hole, and the cover end wall 121 is provided with the second compression hole 104b and the second recovery hole 105b, so that the second compression hole 104b can be coaxial with the first compression hole 104a, and the second recovery hole 105b can be coaxial with the first recovery hole 105a. The cover peripheral wall 122 is sleeved on the piston body 10, for example, the outer cylinder body 114 of the piston body 10, on the one hand, it improves the connection reliability of the end cover 12 and the piston body 10, and on the other hand, it is beneficial to improve the sealing performance of the connection between the end cover 12 and the piston body 10.

[0102] In some specific embodiments, referring to Figure 3As shown, the damping piston 1 further comprises a flexible piece 40, which is sleeved at the joint of 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 piece 40 is provided with protrusions embedded in the grooves. The flexible piece 40 can be used to seal the gap at the joint of the cover peripheral wall 122 and the piston body 10, thereby improving the sealing effect. In addition, the cooperation structure of the protrusions and the grooves can limit the axial movement of the piston body 10, prevent the end cover 12 from separating from the piston body 10, and limit the circumferential movement of the piston body 10, prevent the end cover 12 from rotating relative to the piston body 10, and ensure the coaxiality of the second compression hole 104b and the first compression hole 104a and the coaxiality of the second recovery hole 105b and the first recovery hole 105a.

[0103] In some embodiments, as shown in Figures 3-5 As shown, the fixing piece 31 is annular and arranged between the fan-shaped partition 112 and the peripheral wall (inner or outer) of the annular accommodating cavity 111, for example, between the fan-shaped partition 112 and the inner cylinder 113. The fixing piece 31 has a simpler structure, one fixing piece 31 can cooperate with multiple moving pieces 20 in multiple installation cavities 101, and reliable limiting of the fixing piece 31 can be achieved through the fan-shaped partition 112 and the inner peripheral wall of the annular accommodating cavity 111, thereby simplifying the installation structure.

[0104] In some embodiments, as shown in Figures 3-5 As shown, the elastic piece 32 can be abutted between the moving piece 20 and the peripheral wall (outer or inner) of the annular accommodating cavity 111, for example, between the fan-shaped partition 112 and the outer cylinder 114. Multiple elastic pieces 32 can be arranged in each installation cavity 101, and the multiple elastic pieces 32 can be arranged along the second direction F2 to abut against the moving piece 20 from multiple positions, thereby improving the stability of the force received by the moving piece 20.

[0105] According to some embodiments of the present application, as shown in Figures 3-5 As shown, the moving piece 20 is multiple, and the multiple moving pieces 20 are arranged in a circumferential direction of the piston body 10, and the installation cavities 101 are arranged one by one corresponding to the moving pieces 20. Since multiple installation cavities 101 are arranged on the piston body 10, multiple recovery channels 103 and multiple compression channels 102 are formed correspondingly, which can increase the maximum flow of damping oil of the damper 2 as a whole, thereby improving the damping performance. In addition, the multiple installation cavities 101 are arranged in the circumferential direction of the piston body 10, which can improve the uniformity of the force received by the damping piston 1 during the flow of damping oil, thereby avoiding the jamming of the damping piston 1 in the cylinder 210.

[0106] According to some embodiments of the present application, as shown in Figures 1-3As shown, the damping piston 1 further comprises a flexible member 40 sleeved on the piston body 10, and the flexible member 40 is used to seal the gap between the piston body 10 and the cylinder barrel 210 of the damper 2. For example, the flexible member 40 can be a rubber member and a silica gel member. By sealing the gap through the flexible member 40, the damping oil can be prevented from flowing through the gap between the piston body 10 and the cylinder barrel 210, and the accuracy of the damping force adjustment can be improved.

[0107] In some embodiments, as shown in Figures 1-2 As shown, the damper 2 further comprises a first one-way valve 41 and a second one-way valve 42. The first one-way valve 41 is arranged in the rebound passage 103 and is used to unidirectionally guide the rebound passage 103; and the second one-way valve 42 is arranged in the compression passage 102 and is used to unidirectionally guide the compression passage 102. The directions of the unidirectional guidance of the rebound passage 103 and the compression passage 102 are opposite, for example Figure 2 As shown, the first one-way valve 41 controls the downward unidirectional guidance of the rebound passage 103, and the second one-way valve 42 controls the upward unidirectional guidance of the compression passage 102. In this way, the first one-way valve 41 and the second one-way valve 42 cooperate to prevent the damping oil from being reversely leaked through the rebound passage 103 or the compression passage 102, and the accuracy of the damping force adjustment can be improved.

[0108] The suspension system 100 according to the embodiments of the present application comprises the damper 2 according to the embodiments of the present application. Since the damper 2 according to the embodiments of the present application has the above beneficial technical effects, the suspension system 100 according to the embodiments of the present application drives the moving member 20 to move by the cooperation of the magnetic force and the elastic force, adjusts the flow area of the rebound passage 103 and the compression passage 102, forms rebound damping forces and compression damping forces of different sizes, meets the damping requirements in more working conditions, improves the damping effect, and has no influence on the appearance of the piston body 10 by arranging the moving member 20, the fixing member 31 and the elastic member 32, so that the appearance structure of the damping piston 1 and the structures of other cooperating components on the damper 2 can be unchanged, the production cost can be reduced, the structure can be simplified, the movement space stroke of the damping piston 1 can be ensured, and the damping piston 1 has the advantages of simple structure and low cost.

[0109] In some embodiments of the present application, as shown in Figure 10 and Figure 11 As shown, the suspension system 100 further comprises a control assembly 3 and a detection assembly. The control assembly 3 is connected with the winding 22 and can control the energization state of the winding 22, such as whether the winding 22 is energized and the size of the energization current value.

[0110] The detection assembly includes at least one of a vibration acceleration sensor 4, a wheel rotation angle sensor 5, a throttle opening degree sensor 6, a gyroscope sensor 7, and a wheel speed sensor 8. The detection assembly is connected with the control assembly 3, and the control assembly 3 is configured to control the energization state of the winding 22 according to the detection result of the detection assembly.

[0111] The vibration acceleration sensor 4 can be configured to detect the acceleration of the shock absorber 2 to determine the vibration acceleration of the vehicle body. When the vibration acceleration sensor 4 suddenly increases and then restores the original acceleration, it indicates that the suspension system 100 has a single-point undulation. When the vibration acceleration sensor 4 suddenly increases and remains unchanged, it indicates that the suspension system 100 has a continuous undulation. The wheel rotation angle sensor 5 suddenly displays an angle to indicate that the suspension system 100 starts to turn. If the turning angle changes continuously, it indicates that the suspension system 100 continuously turns. The throttle opening degree sensor 6 is configured to determine whether the driver is accelerating or maintaining a constant speed. The gyroscope sensor 7 is configured to assist in determining the degree of forward and backward swing and the degree of left and right swing of the suspension system 100. The wheel speed sensor 8 is configured to identify the speed of the suspension system 100 during driving.

[0112] Therefore, according to the signals received by various sensors on the spring and the spring, the control assembly 3 is entered, and the current output by the winding 22 is finally controlled through the operation of the control strategy, so as to achieve damping feedback to control the vehicle body. The damping force can be more matched with the actual state of the vehicle body, and the effect of improving the comfort, handling and motion performance of the vehicle is better.

[0113] As shown in Figure 10 and Figure 11 , the control method of the suspension system 100 according to the embodiment of the application can include:

[0114] S1: detecting the state of the shock absorber 2 and the vehicle body;

[0115] S2: controlling the current value of the winding 22 in the damping piston 1 to move the moving part 20 in the first direction F1 according to the detection result.

[0116] Therefore, the flow area of the rebound passage 103 and the compression passage 102 of the shock absorber 2 can be adjusted, so as to form rebound damping forces and compression damping forces of different sizes, meet the damping requirements in more working conditions, improve the damping effect, and the damping force can be more matched with the actual state of the vehicle body, and the effect of improving the comfort, handling and motion performance of the vehicle is better.

[0117] In some embodiments, step S2 can include: when the vehicle speed is 10-30 km / h and the acceleration value of the shock absorber 2 increases and then restores to the initial acceleration, controlling the moving part 20 to move to increase the flow area of the compression passage 102.

[0118] In other words, the suspension system 100 corresponds to a low-speed single-point undulating road, for example, the suspension system 100 passes through a speed bump at a low speed, at which time a larger rebound damping force is required to suppress vibration and thus stabilize the vehicle body. Specifically, by controlling the movement of the moving piece 20 to increase the flow area of the compression passage 102, the compression damping force is reduced, the upward displacement of the shock absorber 2 is larger, the upward displacement of the vehicle body is reduced, the stability and smoothness of the vehicle body are ensured, and thus the comfort of passing through the single-point undulating road is improved.

[0119] In some embodiments, step S2 can include: when the acceleration value of the shock absorber 2 is maintained for a predetermined time after increasing, controlling the moving piece 20 to reciprocate in the first direction F1.

[0120] In other words, the suspension system 100 corresponds to a continuous undulating road, for example, the suspension system 100 passes through a continuous bad road, and the suspension system 100 can be at a low speed, medium speed, or high speed. By controlling the moving piece 20 to reciprocate in the first direction F1, the size relationship between the flow areas of the rebound passage 103 and the compression passage 102 can be changed at any time, thereby providing a damping force that is more suitable for the current needs and more conducive to improving the comfort of the suspension system 100.

[0121] In addition, as the road condition gradually deteriorates, the vibration acceleration value gradually increases, and the flow area of the compression passage 102 can be gradually released, and the compression damping force will decrease, allowing the suspension system 100 to remain in a relatively stable state.

[0122] In some embodiments, step S2 can include: when the steering angle is detected, controlling the moving piece 20 of the shock absorber 2 on the inside of the steering to move to reduce the flow area of the rebound passage 103, and controlling the moving piece 20 of the shock absorber 2 on the outside of the steering to move to reduce the flow area of the compression passage 102.

[0123] In other words, the suspension system 100 corresponds to a continuous undulating road, for example, the suspension system 100 passes through a continuous bad road, and the suspension system 100 can be at a low speed, medium speed, or high speed. By controlling the moving piece 20 to reciprocate in the first direction F1, the size relationship between the flow areas of the rebound passage 103 and the compression passage 102 can be changed at any time, thereby providing a damping force that is more suitable for the current needs and more conducive to improving the comfort of the suspension system 100.

[0124] It should be noted that, when the suspension system 100 continuously turns, due to the continuous change of the steering direction, the shock absorber 2 on the left side alternately changes between the inside of the steering and the outside of the steering, and the shock absorber 2 on the right side alternately changes between the outside of the steering and the inside of the steering, so that the moving part 20 of the shock absorber 2 on the left side can be controlled to reciprocate along the first direction F1, and the moving part 20 of the shock absorber 2 on the right side can be controlled to reciprocate along the first direction F1, so as to always ensure that the rebound damping force of the shock absorber 2 on the inside of the steering increases, and the compression damping force of the shock absorber 2 on the outside of the steering increases, so that the suspension system 100 has better stability in the continuous turning state.

[0125] In some embodiments, step S2 can 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.

[0126] In other words, when the suspension system 100 is running at high speed, the moving part 20 is located at the middle of the mounting cavity 101, so that the rebound damping force and the compression damping force are maintained at a relatively average level, and slightly larger rebound damping force and compression damping force are required to control the shaking, shaking and fluctuation of the vehicle body in the high-speed state.

[0127] In some embodiments, step S2 can include: when the suspension system 100 accelerates, controlling the moving part 20 of the shock absorber 2 on the front side to move to reduce the flow area of the rebound passage 103, and controlling the moving part 20 of the shock absorber 2 on the rear side to move to reduce the flow area of the compression passage 102.

[0128] When the suspension system 100 accelerates, the suspension system 100 will have the conditions of the front end lifting and the rear end collapsing, and the data collected by the vehicle body gyroscope sensor 7 will show the pitch angle of the whole vehicle. At this time, the pitch angle is large, by controlling the moving part 20 of the shock absorber 2 on the front side to move, the rebound damping force can be increased to pull the front end and control the height of the front end lifting; by controlling the moving part 20 of the shock absorber 2 on the rear side to move, the compression damping force can be increased to resist the rear end and control the height of the rear end collapsing. Thus, the front and rear sides work together to better control the stable state of the vehicle body.

[0129] In some embodiments, step S2 can include: when the suspension system 100 decelerates, controlling the moving part 20 of the shock absorber 2 on the front side to move to reduce the flow area of the compression passage 102, and controlling the moving part 20 of the shock absorber 2 on the rear side to move to reduce the flow area of the rebound passage 103.

[0130] When the suspension system 100 decelerates, the suspension system 100 will have a situation of the front end collapsing and the rear end lifting, which is opposite to the situation when the suspension system 100 accelerates. By increasing the compression damping force of the front side shock absorber 2 and increasing the rebound damping force of the rear side shock absorber 2, the height of the rear end lifting and the height of the front end collapsing can be controlled, so that the stable state of the vehicle body can be better controlled.

[0131] It should be noted that in the above embodiment, when the wheel angle sensor 5 and the vehicle body gyroscope sensor 7 do not detect data, the windings 22 of the plurality of shock absorbers 2 on the suspension system 100 can input the same current to provide the same damping force.

[0132] As shown in FIG. 1, in the embodiment in which the fixed part 31 is a permanent magnet and the moving part 20 includes the winding 22, the method for specifically calculating the current value of the winding 22 in step S2 can include: Figure 3

[0133] The current value is calculated according to the following formulas (1)-(4) respectively, and the maximum current value is taken as the actual current value of the winding 22, wherein,

[0134] I = A1X1 + B1 ………………………………………… (1)

[0135] I = A2X2 + C1Y + B2 …………………………………… (2)

[0136] I = A3X3 + B3 ………………………………………… (3)

[0137] I = C2Y ………………………………………… (4)

[0138] A1, A2, A3, B1, B2, B3, C1, C2 are constants, X1 is the acceleration of the shock absorber 2, X2 is the steering angle, X3 is the front and rear pitch angle of the suspension system 100, and Y is the vehicle speed.

[0139] Among them, formula (1) calculates the current required to be output to the winding 22 by the current input device according to the acceleration value detected by the vibration acceleration sensor 4, so as to stabilize the vehicle body; formula (2) calculates the required output current according to the steering angle detected by the wheel angle sensor 5 and the vehicle speed detected by the continuity and wheel speed sensor 8, to control the body roll; formula (3) calculates the required output current according to the pitch angle detected by the vehicle body gyroscope sensor 7, to suppress the discomfort caused by the pitch motion; formula (4) calculates the required output current according to the vehicle speed detected by the wheel speed sensor 8, to improve the driving stability of the vehicle body at high speed.

[0140] ​When multiple parameters such as vibration acceleration, steering angle, vehicle speed, pitch angle, etc. are detected at the same time, multiple current values can be calculated according to corresponding formulas, and by taking the maximum current value as the actual current value of the winding 22, the suspension system 100 can be in the most stable and comfortable state.

[0141] The other configurations and operations of the shock absorber 2 and the suspension system 100 according to the embodiments of the present application are known to those skilled in the art, and will not be described in detail here.

[0142] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood in a broad sense, for example, can be fixedly connected, or detachably connected, or integrally connected; can be mechanically connected, or electrically connected; can be directly connected, or indirectly connected through an intermediate medium; can be internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0143] In the description of the present application, the description of the terms "embodiment", "specific embodiment", "example" and the like means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are contained in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0144] Although the embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and purposes of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A damping piston of a shock absorber, characterized in that: include: A piston body having a mounting cavity; a moving member, the moving member being movably mounted in the mounting cavity and cooperating with the piston body to define a restoration channel and a compression channel, the restoration channel and the compression channel being respectively located on opposite sides of the moving member; A fixing member and an elastic member, wherein the fixing member and the elastic member are mounted on the piston body, and the fixing member is provided in one of the restoration channel and the compression channel, wherein: At least one of the fixed part and the movable part includes a winding, and a magnetic force exists between the fixed part and the movable part when the winding is energized. The elastic part is used to apply an elastic force opposite to the direction of the magnetic force to the movable part. Under the action of the magnetic force and the elastic force, the movable part moves away from or close to the fixed part to adjust the flow area of ​​the recovery channel and the compression channel.

2. The damping piston of the shock absorber according to claim 1, characterized in that: The elastic member is arranged between the fixed member and the movable member, or the elastic member is arranged on a side of the movable member facing away from the fixed member.

3. The damping piston of the shock absorber according to claim 1, characterized in that: The fixed part is a permanent magnet, and the movable part includes an iron core and the winding wound around the iron core.

4. The damping piston of the shock absorber according to claim 3, characterized in that: The iron core is provided with an annular groove, the axis of the annular groove is parallel to the moving direction of the moving part, and the winding is embedded in the annular groove.

5. The damping piston of the shock absorber according to claim 1, characterized in that: The movable member is provided with a plurality of elastic members corresponding to the movable member, and the plurality of elastic members are arranged at intervals along the axial direction of the piston body.

6. The damping piston of the shock absorber according to claim 1, characterized in that: The piston body has an annular accommodating cavity, and a first recovery hole and a first compression hole are provided at one axial end of the piston body. The other end of the piston body is provided with an open mouth of the annular accommodating cavity. A plurality of fan-shaped partitions are provided in the annular accommodating cavity, and the installation cavity is formed between two adjacent fan-shaped partitions.

7. The damping piston of the shock absorber according to claim 6, characterized in that: The elastic member is provided in the other of the restoration channel and the compression channel. When the movable member and the fixed member are in contact with each other, the movable member at least partially blocks the first restoration hole and at least partially opens the first compression hole; When the distance between the moving member and the fixed member is at its largest, the moving member at least partially blocks the first compression hole and at least partially opens the first restoration hole.

8. The damping piston of the shock absorber according to claim 7, characterized in that: When the movable member and the fixed member are in contact with each other, the movable member completely blocks the first restoration hole and completely opens the first compression hole; When the distance between the moving member and the fixed member is at its maximum, the moving member completely blocks the first compression hole and completely opens the first restoration hole.

9. The damping piston of the shock absorber according to claim 6, characterized in that: The installation cavity is in the shape of an elongated strip along the radial direction, and the planes where the two opposite side surfaces of two adjacent sector-shaped partitions lie are parallel to each other.

10. The damping piston of the shock absorber according to claim 6, characterized in that: The piston body comprises: an inner cylinder defining a mounting hole for mounting a connecting rod of the shock absorber; an outer cylinder, the outer cylinder being arranged around the inner cylinder, the fixing member being mounted on one of the inner cylinder and the outer cylinder, and the elastic member being arranged between the other of the inner cylinder and the outer cylinder and the moving member; A connecting end wall connects one axial end of the inner cylinder and one axial end of the outer cylinder, the connecting end wall is provided with the first compression hole and the first recovery hole, the fan-shaped partition is located in the annular accommodating cavity between the inner cylinder and the outer cylinder, and is connected to the connecting end wall.

11. The damping piston of the shock absorber according to claim 6, characterized in that: The fixing member is an annular structure and is arranged between the fan-shaped partition and the peripheral wall of the annular accommodating cavity.

12. The damping piston of the shock absorber according to claim 6, characterized in that: The damping piston also includes an end cover, which covers the open port and is provided with a second restoration hole opposite to the first restoration hole on the piston body, and a second compression hole opposite to the first compression hole on the piston body, the first restoration hole and the second restoration hole are connected through the restoration channel, and the first compression hole and the second compression hole are connected through the compression channel.

13. The damping piston of the shock absorber according to claim 12, characterized in that: The end cover includes a cover end wall and a cover peripheral wall, the cover end wall is connected to one axial end of the cover peripheral wall, the cover end wall covers the open port and is provided with the compression hole and the recovery hole, and the cover peripheral wall is sleeved on the piston body. The damping piston further comprises a flexible member, which is sleeved at the connection between the cover wall and the piston body. The outer circumferential surfaces of the cover wall and the piston body are provided with grooves, and the flexible member is provided with a protrusion embedded in the groove.

14. The damping piston of the shock absorber according to claim 1, characterized in that There are a plurality of moving parts, and the plurality of moving parts are arranged at intervals along the circumference of the piston body, and the mounting cavities are provided in a one-to-one correspondence with the moving parts.

15. A shock absorber, characterized in that: The shock absorber comprises a cylinder, a connecting rod and a damping piston according to any one of claims 1 to 14, wherein the damping piston is arranged in the cylinder and is sealed with 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.

16. The shock absorber according to claim 15, characterized in that Also includes: a first one-way valve disc, the first one-way valve disc being provided in the restoration passage and being used to make the restoration passage unidirectional; A second one-way valve plate is provided in the compression channel and is used to make the compression channel conduct in one direction. The restoration channel and the compression channel have opposite conduction directions.

17. A suspension system, characterized in that: Comprising a vibration absorber according to claim 15 or 16.

18. The suspension system according to claim 17, wherein: The suspension system further comprises: a control component connected to the winding; A detection component, the 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 is used to control the power-on state of the winding according to the detection result of the detection component.

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