Valve structure and shock absorber

Abstract

A valve structure and a shock absorber, the valve structure comprising a valve sleeve, a valve seat structure, a first valve core, a second valve core and an elastic structure. The valve sleeve has a fluid discharge passage, the valve seat structure is arranged opposite to the valve sleeve along the extension direction of the axis of the valve sleeve. The elastic structure is pre-pressed between the first valve core and the valve sleeve along the extension direction of the axis, the elastic structure comprises two parts in the extension direction of the axis, the stiffness of the two parts is different. The side of the valve seat structure away from the valve sleeve comprises a passage opening, the valve structure comprises a continuous flow passage from the surface of the first valve core towards the valve seat structure to the passage opening, the flow cross-sectional area of any section of the continuous flow passage is not less than the area of the passage opening. The first valve core forms a variable flow opening with the valve seat structure in the process of reciprocating movement, the continuous flow passage communicates with the fluid discharge passage through at least one of the variable flow opening and the internal flow passage of the first valve core. Thus, the driving experience can be improved, and the safety of the valve structure can be improved.

Description

Technical Field

[0001] At least one embodiment of this disclosure relates to a valve structure and a vibration damper. Background Technology

[0002] To improve vehicle driving comfort, shock absorbers can be installed in the suspension system. Shock absorbers rely on damping valves to regulate the flow and throttling of damping fluid, converting vibrational mechanical energy into heat energy and dissipating it, thereby improving vehicle ride smoothness and handling stability, and optimizing the driving experience. Summary of the Invention

[0003] At least one embodiment of this disclosure provides a valve structure and a vibration damper.

[0004] At least one embodiment of this disclosure provides a valve structure, including: a valve sleeve having a fluid discharge channel, the outlet of which is directly connected to an external space; a valve seat structure disposed opposite to the valve sleeve along an extension direction of the valve sleeve's axis; a first valve core, at least partially located within the valve sleeve and configured to reciprocate along the extension direction of the axis; a second valve core located on the side of the first valve core away from the valve seat structure; and an elastic structure pre-compressed between the first valve core and the valve sleeve along the extension direction of the axis; the elastic structure includes two parts along the extension direction of the axis, the two parts having different stiffnesses; wherein the second valve core is configured to reciprocate in... Under the action of electromagnetic driving force, it can move along the extension direction of the axis to apply a force toward the valve seat structure to the first valve core; the valve seat structure includes a channel opening on the side away from the valve sleeve, and the valve structure includes a continuous flow channel from the surface of the first valve core toward the valve seat structure to the channel opening, and the flow cross-sectional area of ​​any segment of the continuous flow channel is not less than the area of ​​the channel opening; the first valve core forms a variable flow opening with the valve seat structure during its reciprocating motion, and the continuous flow channel communicates with the fluid discharge channel through at least one of the variable flow opening and the internal flow channel of the first valve core.

[0005] For example, according to at least one embodiment of the present disclosure, the elastic structure includes a first elastic element and a second elastic element, the second elastic element being located between the first elastic element and the first valve core in the extension direction of the axis, and the stiffness of the second elastic element being less than the stiffness of the first elastic element.

[0006] For example, according to at least one embodiment of the present disclosure, the outer diameter of the second elastic element is larger than the outer diameter of the first elastic element.

[0007] For example, according to at least one embodiment of the present disclosure, the side of the first valve core facing the valve sleeve includes a recess and a positioning portion surrounding the recess; the second elastic element includes a first portion and a second portion surrounding the first portion, the first portion overlapping the recess on a reference plane perpendicular to the axis; the second portion is connected to the positioning portion; the first elastic element is connected between the first portion of the second elastic element and the valve sleeve, and the second elastic element includes a first valve plate.

[0008] For example, according to at least one embodiment of the present disclosure, in a direction parallel to the axis, the valve sleeve includes a first protrusion on the side facing the first valve core, the first protrusion surrounding the end of the first elastic element away from the second elastic element, and is configured to guide the first elastic element to elastically deform along the axis.

[0009] For example, according to at least one embodiment of the present disclosure, the first valve core includes an extension extending in the extension direction along the axis, the internal flow channel being formed within the extension, and the elastic structure being sleeved outside the extension; the first valve core also includes a mating portion surrounding the extension and a connecting portion connecting the mating portion and the extension, the outer side of the mating portion engaging with the inner side of the valve sleeve; in a direction perpendicular to the axis, the mating portion overlaps with the extension.

[0010] For example, according to at least one embodiment of the present disclosure, the connecting portion is connected between the end of the extension portion away from the second valve core and the end of the mating portion away from the second valve core.

[0011] For example, according to at least one embodiment of this disclosure, the inlet of the internal flow channel is disposed opposite to the second valve core along the extension direction of the axis.

[0012] For example, according to at least one embodiment of this disclosure, on a reference plane perpendicular to the axis, the orthographic projection of the inlet of the internal flow channel does not overlap with the orthographic projection of the elastic structure.

[0013] For example, according to at least one embodiment of the present disclosure, the valve structure further includes a seal sleeved outside the mating portion; the seal overlaps with the extension portion in a direction perpendicular to the axis.

[0014] For example, according to at least one embodiment of the present disclosure, the outlet of the fluid discharge channel is located on the outer wall of the valve sleeve.

[0015] For example, according to at least one embodiment of this disclosure, the axis passes through the continuous flow channel.

[0016] For example, according to at least one embodiment of this disclosure, the valve seat structure includes a connecting seat and an annular member; the annular member is connected between the connecting seat and the valve sleeve, and in the extension direction of the axis, the annular member is opposite to the first valve core to form the variable flow opening; the continuous flow channel includes a first flow channel opened in the connecting seat and a second flow channel formed around the annular member, the first flow channel and the second flow channel being in communication; the valve structure further includes a second valve plate and a biasing member, the connecting seat is also provided with a return flow channel, the second valve plate is disposed at the outlet of the return flow channel, and the biasing member is pre-pressed between the second valve plate and the annular member.

[0017] For example, according to at least one embodiment of the present disclosure, the annular member includes a second protrusion protruding toward the connecting seat, and the biasing member is sleeved over the second protrusion.

[0018] At least one embodiment of this disclosure provides a vibration damper including the valve structure described in any of the above embodiments. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this disclosure, the accompanying drawings of the embodiments will be briefly described below. Obviously, the drawings described below only relate to some embodiments of this disclosure and are not intended to limit this disclosure.

[0020] Figure 1 This is a schematic diagram of the valve structure provided in at least one embodiment of the present disclosure.

[0021] Figure 2 This is an exploded view of a valve structure provided as an example in at least one embodiment of the present disclosure.

[0022] Figure 3 This is a cross-sectional schematic diagram of a valve structure provided in at least one embodiment of the present disclosure.

[0023] Figure 4 for Figure 3 A magnified view of a portion of point A shown. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. Based on the described embodiments of this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0025] Unless otherwise defined, the technical or scientific terms used in this disclosure shall have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms “first,” “second,” and similar terms used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as “comprising” or “including” mean that an element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects.

[0026] The terms "parallel," "perpendicular," and "identical" as used in this disclosure include the strictly defined meanings of "parallel," "perpendicular," and "identical," as well as cases where "approximately parallel," "approximately perpendicular," and "approximately identical" include some degree of error. Taking into account measurement and errors associated with the measurement of a specific quantity (i.e., limitations of the measurement system), they represent the acceptable deviation range for a specific value as determined by a person skilled in the art. In embodiments of this disclosure, "center" can include a strictly geometrically centered location and an approximate center location within a small area surrounding the geometrically centered location. For example, "approximately" can mean within one or more standard deviations, or within 10% or 5% of the value.

[0027] At least one embodiment of this disclosure provides a valve structure, which includes a valve sleeve, a valve seat structure, a first valve core, a second valve core, and an elastic structure. The valve sleeve has a fluid discharge channel, the outlet of which is directly connected to the external space; the valve seat structure is disposed opposite to the valve sleeve along the extension direction of the valve sleeve's axis; the first valve core is at least partially located inside the valve sleeve and is configured to reciprocate along the extension direction of the axis; the second valve core is located on the side of the first valve core away from the valve seat structure; an elastic structure is pre-pressed between the first valve core and the valve sleeve along the extension direction of the axis, the elastic structure comprising two parts with different stiffnesses along the extension direction of the axis; wherein, the second valve core is configured to move along the extension direction of the axis under the action of electromagnetic driving force to apply a force toward the valve seat structure to the first valve core; the side of the valve seat structure away from the valve sleeve includes a channel opening, the valve structure includes a continuous flow channel from the surface of the first valve core toward the valve seat structure to the channel opening, the cross-sectional area of ​​any segment of the continuous flow channel is not less than the area of ​​the channel opening; the first valve core forms a variable flow opening with the valve seat structure during its reciprocating motion, the continuous flow channel is connected to the fluid discharge channel through at least one of the variable flow opening and the internal flow channel of the first valve core.

[0028] At least one embodiment of this disclosure provides a vibration damper including the valve structure described above.

[0029] At least one embodiment of the valve structure and vibration damper provided in this disclosure forms a continuous flow channel between the surface of the first valve core facing the valve seat structure and the channel opening, and the cross-sectional area of ​​any segment of the continuous flow channel is not less than the area of ​​the channel opening, so that the fluid does not experience throttling after flowing into the continuous flow channel from the channel opening. While improving the throttling phenomenon of the fluid in the continuous flow channel, the elastic structure is set to include two parts with different stiffnesses, and the part with smaller stiffness can more easily undergo elastic deformation first. In this case, the elastic structure can include at least two stages of elastic deformation, so that the valve structure of this disclosure does not need to include the base valve in other damping valves. In other words, by setting the elastic structure including two parts with different stiffnesses in this disclosure, the first valve core can have the characteristics of both a base valve and a main valve, realizing at least two damping force characteristics, which is beneficial to reducing the size of the valve structure in the axial extension direction and is beneficial to the miniaturization of the valve structure. In the valve structure disclosed herein, when the second valve core is not controlled by electromagnetic driving force (e.g., in the state of de-energization of the electromagnetic part), fluid can rapidly flow into the valve structure from the continuous flow channel. Furthermore, a small force applied by the fluid to the first valve core is sufficient to cause elastic deformation of the less stiff portion of the elastic structure, opening the variable flow opening between the first valve core and the valve seat structure. Consequently, the damping force of the valve structure can be very small. Thus, the shock absorber can achieve lower damping force in a comfortable state, exhibiting a "softer" performance and improving the driving experience. Moreover, in situations such as a sudden de-energization of the electromagnetic part, the damping performance can be provided by utilizing the first valve core and the elastic structure comprising two parts with different stiffnesses, enhancing the safety of the valve structure.

[0030] The valve structure and vibration damper are described below with reference to the accompanying drawings and through some embodiments.

[0031] Figure 1 This is a schematic diagram of the valve structure provided in at least one embodiment of the present disclosure. Figure 2 This is an exploded view of a valve structure provided in at least one embodiment of the present disclosure. Figure 3 This is a cross-sectional schematic diagram of a valve structure provided in at least one embodiment of the present disclosure.

[0032] refer to Figure 1 , Figure 2 and Figure 3 This disclosure provides a valve structure. The valve structure includes a valve sleeve 100, a valve seat structure 200, a first valve core 300, a second valve core 400, and an elastic structure 500. The valve sleeve 100 has a fluid discharge channel 101, the outlet of which is directly connected to the external space. For example, fluid can be discharged directly from inside the valve structure through the fluid discharge channel 101, such as being discharged to the external space through the outlet of the fluid discharge channel 101.

[0033] For example, "the exit is directly connected to the external space" means that the exit does not need to be connected to the external space through other channels, chambers, etc. It is understood that "direct" in this article means that it does not need to be indirectly achieved through other structures, which will not be elaborated on later.

[0034] refer to Figure 1 , Figure 2 and Figure 3 The valve seat structure 200 is disposed opposite to the valve sleeve 100 along the extension direction of the axis AX. The first valve core 300 is at least partially located within the valve sleeve 100 and is configured to reciprocate along the extension direction of the axis AX. For example, the first valve core 300 may be completely located within the valve sleeve 100, or partially located within the valve sleeve 100 and partially located outside the valve sleeve 100. The second valve core 400 is located on the side of the first valve core 300 away from the valve seat structure 200. For example, the second valve core 400, the first valve core 300, and the valve seat structure 200 are arranged sequentially along the extension direction of the axis AX.

[0035] refer to Figure 1 , Figure 2 and Figure 3 The elastic structure 500 is pre-pressed between the first valve core 300 and the valve sleeve 100 along the extension direction of the axis AX, so as to apply a force toward the valve seat structure 200 to the first valve core 300. The elastic structure 500 includes two parts with different stiffnesses along the extension direction of the axis AX. Thus, when the elastic structure 500 is subjected to pressure, the part with less stiffness can undergo elastic deformation first, while the part with greater stiffness can undergo elastic deformation later as the pressure continues to increase.

[0036] refer to Figure 1 , Figure 2 and Figure 3 The second valve core 400 is configured to move along the extension direction of axis AX under the action of electromagnetic driving force to apply a force toward the valve seat structure 200 to the first valve core 300. The valve seat structure 200 includes a channel opening 201 on the side away from the valve sleeve 100. The valve structure includes a continuous flow channel 10 extending from the surface of the first valve core 300 toward the valve seat structure 200 to the channel opening 201, wherein the flow cross-sectional area of ​​any segment of the continuous flow channel 10 is not less than the area of ​​the channel opening 201. For example, the flow cross-sectional area of ​​any segment of the continuous flow channel 10 may be greater than or equal to the area of ​​the channel opening 201, thereby preventing throttling.

[0037] refer to Figure 3 It is understandable that the continuous flow channel 10 means that there is no other structure blocking the fluid between the surface of the first valve core 300 facing the valve seat structure 200 and the channel opening 201.

[0038] refer to Figure 1 , Figure 2 and Figure 3 During its reciprocating motion, the first valve core 300 forms a variable flow opening 01 between itself and the valve seat structure 200. The size of the variable flow opening 01 can change with the relative movement between the first valve core 300 and the valve seat structure 200, thereby realizing the opening or closing of the variable flow opening 01. Figure 3 The diagram schematically illustrates two flow paths of fluid within the valve structure. A continuous flow passage 10 communicates with a fluid discharge passage 101 via at least one of a variable flow opening 01 and an internal flow channel 301 of the first valve core 300. For example, the continuous flow passage 10 may communicate with the fluid discharge passage 101 only via the variable flow opening 01. Alternatively, the continuous flow passage 10 may communicate with the fluid discharge passage 101 only via the internal flow channel 301 of the first valve core 300. Or, the continuous flow passage 10 may communicate with the fluid discharge passage 101 via both the variable flow opening 01 and the internal flow channel 301 of the first valve core 300.

[0039] refer to Figures 1 to 3 In the valve structure provided in this embodiment, a continuous flow channel 10 is formed between the surface of the first valve core 300 facing the valve seat structure 200 and the channel opening 201. The cross-sectional area of ​​any segment of the continuous flow channel 10 is not less than the area of ​​the channel opening 201, thus preventing fluid from being throttled after flowing into the continuous flow channel 10 from the channel opening 201. Simultaneously, by setting the fluid discharge channel 101 on the valve sleeve 100, the dimensions of the continuous flow channel 10 and the fluid discharge channel 101 are designed with greater freedom, better meeting different design requirements. For example, the radial dimension of the continuous flow channel 10 can be designed to be larger. Furthermore, it can reduce the risk of blockage caused by impurities in the fluid depositing in the continuous flow channel 10.

[0040] While improving the throttling phenomenon of fluid in the continuous flow channel 10, the elastic structure 500 is configured to include two parts with different stiffnesses, with the part with lower stiffness more easily undergoing elastic deformation first. In this case, the elastic structure 500 can include at least two stages of elastic deformation, thus eliminating the need for a base valve in other damping valves in the valve structure of this disclosure. In other words, by configuring the elastic structure 500 with two parts of different stiffnesses in this disclosure, the first valve core 300 can possess the characteristics of both a base valve and a main valve, achieving at least two damping force characteristics. This, in turn, helps to reduce the size of the valve structure in the extension direction of the axis AX, facilitating valve miniaturization and making installation space more efficient.

[0041] As can be seen from the above, in the valve structure disclosed herein, when the second valve core 400 is not controlled by electromagnetic driving force (e.g., in the state of de-energization of the electromagnetic part), fluid can quickly flow into the valve structure from the continuous flow channel 10. Furthermore, a small force applied by the fluid to the first valve core 300 is sufficient to cause elastic deformation of the less stiff portion of the elastic structure 500, thereby opening the variable flow opening 01 between the first valve core 300 and the valve seat structure 200. Thus, the damping force of the valve structure can be very small. Consequently, the shock absorber can achieve a smaller damping force in a comfortable state, exhibiting a "softer" performance and improving the driving experience. Moreover, in situations such as a sudden de-energization of the electromagnetic part, the first valve core 300 and the elastic structure 500, comprising two parts with different stiffnesses, can be used to provide damping performance, enhancing the safety of the valve structure.

[0042] Furthermore, the flow path of the fluid within the valve structure is correspondingly altered. For example... Figure 3 As shown in the schematic diagram of the fluid flow path, fluid can flow to the fluid discharge channel 101 through the variable flow opening 01 between the first valve core 300 and the valve seat structure 200, or through the internal flow channel 301 in the first valve core 300, thereby being directly discharged to the external space through the fluid discharge channel 101 on the valve sleeve 100. Combining the above fluid flow path, it can be seen that opening a fluid discharge channel 101 directly connected to the external space on the valve sleeve 100 also helps to shorten the fluid discharge path.

[0043] For example, the fluid in the embodiments of this disclosure may include damping fluid, such as oil, or a mixture of gas and liquid, etc., and this disclosure does not limit it.

[0044] refer to Figure 2 and Figure 3 For example, the second valve core 400 is configured to face or move away from the first valve core 300 to close or open the opening of the internal flow channel 301 of the first valve core 300, thereby controlling the flow rate of fluid exiting from the opening of the internal flow channel 301. For example, the second valve core 400 can press against the opening of the internal flow channel 301 of the first valve core 300 to block the opening. When the pressure on the second valve core 400 reaches a certain level, fluid can overcome the pressure of the second valve core 400 and flow out.

[0045] refer to Figure 2 and Figure 3 For example, the second valve core 400 can be a pilot valve core.

[0046] refer to Figure 3For example, the valve structure may also include an electromagnetic component 901, a valve armature 902, and a valve stem 903. The valve stem 903 can pass through the valve armature 902. The electromagnetic component 901 is configured to drive the valve armature 902 to reciprocate along its axial direction, thereby driving the valve stem 903 to reciprocate. For example, the valve stem 903 can be configured to drive the second valve core 400 to reciprocate, thereby realizing the reciprocating motion of the second valve core 400 driven by electromagnetic driving force. Thus, the electromagnetic component 901 can drive the valve armature 902 and the valve stem 903, thereby controlling the clamping force of the second valve core 400, that is, controlling the opening degree of the internal flow channel 301 of the first valve core 300, and realizing adjustable damping force.

[0047] refer to Figure 2 and Figure 3 In some examples, the axis AX passes through the continuous flow channel 10. This facilitates a more uniform distribution of the hydraulic force of the fluid, simplifies the assembly process, and ensures accuracy.

[0048] refer to Figure 2 and Figure 3 For example, axis AX passes through continuous flow channel 10 and through channel opening 201. For example, axis AX coincides with the centerline of continuous flow channel 10 and passes through the center of channel opening 201. For example, on a reference plane perpendicular to axis AX, the orthographic projection of continuous flow channel 10 covers channel opening 201. For example, in a direction perpendicular to axis AX, the dimension of any segment of continuous flow channel 10 is not less than the maximum dimension of channel opening 201.

[0049] refer to Figures 1 to 3 In some examples, the outlet of the fluid discharge channel 101 is located on the outer wall of the valve sleeve 100. This facilitates direct communication between the outlet of the fluid discharge channel 101 and the external space, simplifying the manufacturing process of the fluid discharge channel 101. Furthermore, it shortens the fluid discharge path length. It is understood that the machinable space of the outer wall of the valve sleeve 100 is relatively large (e.g., compared to the end face of the valve sleeve 100), and by placing the outlet of the fluid discharge channel 101 on the outer wall of the valve sleeve 100, it is also advantageous to design the size of the outlet of the fluid discharge channel 101 as needed.

[0050] refer to Figures 1 to 3 For example, the fluid discharge channel 101 includes a first discharge channel 1011 and a second discharge channel 1012 that are connected to each other. The extending direction of the first discharge channel 1011 may intersect the extending direction of the second discharge channel 1012, and the end of the second discharge channel 1012 away from the axis AX opens as the outlet of the fluid discharge channel 101. For example, the extending direction of the first discharge channel 1011 may be approximately parallel to the axis AX, and the extending direction of the second discharge channel 1012 may be approximately perpendicular to the axis AX.

[0051] refer to Figure 2 and Figure 3 For example, in a direction perpendicular to axis AX, the variable flow opening 01 and the second discharge channel 1012 are arranged opposite each other, which helps to shorten the flow path of the fluid.

[0052] refer to Figure 2 and Figure 3 For example, the second discharge channel 1012 and the variable flow opening 01 can be arranged opposite each other in a direction perpendicular to the axis AX. For example, a straight line perpendicular to the axis AX can pass through the variable flow opening 01 and the second discharge channel 1012. For example, a straight line perpendicular to the axis AX and passing through the center of the second discharge channel 1012 can pass through the variable flow opening 01.

[0053] Figure 4 for Figure 3 A magnified view of a portion of point A shown.

[0054] refer to Figures 2 to 4 In some examples, the elastic structure 500 includes a first elastic element 510 and a second elastic element 520. The second elastic element 520 is located between the first elastic element 510 and the first valve core 300 in the extension direction of the axis AX, and the stiffness of the second elastic element 520 is less than that of the first elastic element 510. Therefore, when fluid flows into the continuous flow channel 10 and applies a force to the first valve core 300, the second elastic element 520 can first undergo elastic deformation. As the force applied by the fluid to the first valve core 300 gradually increases, the first elastic element 510 then undergoes elastic deformation. Thus, the pressure-flow curves under different pressures and currents can be adjusted as needed.

[0055] refer to Figures 2 to 4 The first elastic element 510 and the second elastic element 520 can be two parts with different stiffnesses in the elastic structure 500. However, this disclosure is not limited to this. For example, the elastic structure 500 may also include more parts with different stiffnesses to improve the design freedom of the elastic structure 500, thereby allowing the damping force curve to be adjusted as needed. For example, the elastic structure may include other elastic elements, the stiffness of which may be the same as or different from the stiffness of the first elastic element and / or the second elastic element, and this disclosure does not limit this.

[0056] refer to Figures 2 to 4 Understandable Figures 2 to 4The first elastic element 510 and the second elastic element 520 are shown only schematically as separate components. However, this disclosure is not limiting in this regard, and in other examples, the first elastic element and the second elastic element may also be an integral structure, such as a structure connected as one piece or a structure formed in one piece.

[0057] refer to Figures 2 to 4 In some examples, the outer diameter of the second elastic element 520 is larger than that of the first elastic element 510. Designing a larger outer diameter for the less stiff second elastic element 520 helps to disperse stress, making it easier for the second elastic element 520 to undergo elastic deformation, thus facilitating the achievement of a smaller damping force. Furthermore, it also allows the second elastic element 520 to better support the first elastic element 510.

[0058] refer to Figures 2 to 4 In some examples, the side of the first valve core 300 facing the valve sleeve 100 includes a recess 310 and a positioning portion 320 surrounding the recess 310. For example, at least a portion of the positioning portion 320 protrudes from the recess 310. For example, the surface of the positioning portion 320 away from the valve seat structure 200 is closer to the second valve core 400 than the surface of the recess 310 away from the valve seat structure 200. The second elastic element 520 includes a first portion 521 and a second portion 522 surrounding the first portion 521. On a reference plane perpendicular to the axis AX, the first portion 521 overlaps with the recess 310, and the second portion 522 is connected to the positioning portion 320. For example, in a direction parallel to the axis AX, the junction of the first portion 521 and the second portion 522 may overlap with the edge junction of the recess 310 and the positioning portion 320. For example, on a reference plane perpendicular to axis AX, the orthographic projection of the first part 521 can be approximately annular, the orthographic projection of the second part 522 can be approximately annular, and the orthographic projection of the second part 522 surrounds the orthographic projection of the first part 521.

[0059] refer to Figures 2 to 4 In some examples, the first elastic element 510 is connected between the first portion 521 of the second elastic element 520 and the valve sleeve 100, and the second elastic element 520 includes a first valve plate. The second portion 522 of the second elastic element 520 is connected to the positioning portion 320 to position the second elastic element 520. Simultaneously, by providing the recess 310, space can be reserved for elastic deformation of the first portion 521 of the second elastic element 520. It is understood that by designing the depth of the recess 310, the maximum deformation of the first valve plate can be limited, preventing breakage. Furthermore, the first portion 521 of the second elastic element 520 can provide support for the first elastic element 510, allowing the first elastic element 510 to be installed between the first portion 521 and the valve sleeve 100.

[0060] refer to Figures 2 to 4 For example, the second elastic element 520 may include only one first valve plate or multiple first valve plates. For example, the properties of the first valve plates, such as their number, thickness, and material, can be designed to determine the stiffness of the second elastic element 520, thereby increasing the design freedom of the elastic structure 500 and thus increasing the adjustable range of the damping force of the valve structure.

[0061] refer to Figure 3 and Figure 4 In some examples, the valve sleeve 100 includes a first protrusion 110 on the side facing the first valve core 300 in a direction parallel to the axis AX. The first protrusion 110 surrounds the end of the first elastic element 510 away from the second elastic element 520 and is configured to guide the first elastic element 510 to undergo elastic deformation along the axis AX, thereby preventing the first elastic element 510 from undergoing large displacement during elastic deformation and facilitating a more uniform force on the second elastic element 520 and the first valve core 300.

[0062] refer to Figure 3 and Figure 4 For example, the first protrusion 110 protrudes toward the valve seat structure 200. For example, along the direction parallel to the axis AX and from the valve sleeve 100 toward the channel opening 201 of the valve seat structure 200, the thickness of the first protrusion 110 gradually decreases, that is, the size of the first protrusion 110 in the direction perpendicular to the axis AX gradually decreases. For example, along the direction parallel to the axis AX and from the valve sleeve 100 toward the channel opening 201 of the valve seat structure 200, the outer diameter of the first protrusion 110 gradually decreases to facilitate demolding and to facilitate avoiding the reciprocating motion of the first valve core 300. For example, the inner wall of the first protrusion 110 is approximately parallel to the axis AX to facilitate guiding the first elastic element 510 to undergo elastic deformation along the axis AX.

[0063] refer to Figure 3 and Figure 4 In some examples, the first valve core 300 includes an extension 330 extending in the extending direction along the axis AX (see reference). Figure 4 The internal flow channel 301 is formed within the extension 330, and the elastic structure 500 is sleeved outside the extension 330 to facilitate elastic deformation of the elastic structure 500 in the extension direction of the axis AX through the extension 330. Figure 4As shown, the first valve core 300 also includes a mating portion 340 surrounding the extension 330 and a connecting portion 350 connecting the mating portion 340 and the extension 330. The outer surface of the mating portion 340 mates with the inner surface of the valve sleeve 100, thereby guiding the mating portion 340 through the valve sleeve 100 to move the first valve core 300 in the extension direction of the axis AX. In the direction perpendicular to the axis AX, the mating portion 340 overlaps with the extension 330, which helps to reduce the space occupied by the first valve core 300 in the extension direction of the axis AX.

[0064] refer to Figure 3 and Figure 4 For example, the first elastic element 510 may include a spring. It is understood that, in conjunction with the foregoing example, in order to better achieve elastic deformation of the elastic structure 500 in the extension direction of the axis AX, the outer diameter of the first elastic element 510 is designed to be smaller. This is beneficial for the radial dimension of the first elastic element 510 (such as a spring) to match the outer diameter of the extension 330, and to prevent the first elastic element 510 from undergoing large displacement during elastic deformation.

[0065] refer to Figure 3 and Figure 4 For example, the recessed portion 310 and the positioning portion 320 in the aforementioned example can be provided on the side of the connecting portion 350 away from the valve seat structure 200.

[0066] refer to Figure 3 and Figure 4 In some examples, the connecting portion 350 connects the end of the extension 330 away from the second valve core 400 and the end of the mating portion 340 away from the second valve core 400. For example, the overall cross-sectional shape of the first valve core 300 is approximately inverted T-shaped. This facilitates increasing the distance between the connecting portion 350 and the valve sleeve 100 in the direction parallel to the axis AX, thereby increasing the space available to accommodate the elastic structure 500, which is beneficial for the installation of the elastic structure 500.

[0067] refer to Figure 3 and Figure 4 In some examples, the valve structure also includes a seal 600 fitted over the mating portion 340. The seal 600 overlaps with the extension 330 in the direction perpendicular to the axis AX. It is understood that the mating portion 340 overlaps with the extension 330 in the direction perpendicular to the axis AX. This helps to reduce the space occupied by the first valve core 300 in the extension direction of the axis AX.

[0068] refer to Figure 2 and Figure 3In some examples, the inlet of the internal flow channel 301 is positioned opposite to the second valve core 400 along the extension direction of the axis AX. The inlet of the internal flow channel 301 is also the opening of the internal flow channel 301 facing the valve seat structure 200, and this opening can be directly connected to the continuous flow channel 10. Thus, the internal flow channel 301 can extend approximately along the axis AX, which helps to shorten the path of the internal flow channel 301.

[0069] refer to Figure 2 and Figure 3 In some examples, on a reference plane perpendicular to axis AX, the orthographic projection of the inlet of the internal flow channel 301 does not overlap with the orthographic projection of the elastic structure 500. For example, axis AX can pass through the internal flow channel 301, such as through the inlet of the internal flow channel 301. For example, the first valve core 300 is coaxially arranged with the valve sleeve 100, and the internal flow channel 301 can be opened approximately along the centerline of the first valve core 300. Thus, the fluid flowing in from the continuous flow channel 10 can exert a uniform force on the first valve core 300, and the flowing fluid will not directly act on the second elastic element 520 of the elastic structure 500, which is beneficial to the uniform deformation of the second elastic element 520.

[0070] refer to Figure 2 and Figure 3 In some examples, the valve seat structure 200 includes a connecting seat 210 and an annular member 220. The annular member 220 is connected between the connecting seat 210 and the valve sleeve 100. For example, the valve sleeve 100 may be fitted over the annular member 220. For example, the annular member 220 may be fitted over the connecting seat 210. The valve sleeve 100 and the annular member 220, as well as the annular member 220 and the connecting seat 210, may be fixed by means of threaded connection, interference fit (such as riveting), or welding. It is understood that as long as reliable fixing of the valve sleeve 100, the connecting seat 210, and the annular member 220 can be achieved, this disclosure does not limit the specific fixing method.

[0071] refer to Figure 2 and Figure 3 In some examples, the annular member 220 is opposite to the first valve core 300 in the extension direction of axis AX to form a variable flow opening 01. The continuous flow channel 10 includes a first flow channel 11 formed in the connecting seat 210 and a second flow channel 12 formed around which the annular member 220 surrounds, the first flow channel 11 and the second flow channel 12 being connected. For example, the first flow channel 11 and the second flow channel 12 are directly connected to form the continuous flow channel 10.

[0072] refer to Figure 2 and Figure 3In some examples, the valve structure also includes a second valve plate 700 and a biasing element 800. A return flow channel 20 is also provided on the connecting seat 210. The second valve plate 700 is located at the outlet of the return flow channel 20, and the biasing element 800 is pre-pressed between the second valve plate 700 and the annular element 220. For example, the second valve plate 700 and the biasing element 800 can be located within the second flow channel 12. It is understood that the outlet of the return flow channel 20 can be an opening on the side of the return flow channel 20 facing the first valve core 300. Thus, the biasing element 800 can apply pressure to the second valve plate 700 towards the connecting seat 210, thereby controlling the flow rate of fluid flowing from the return flow channel 20 into the valve structure.

[0073] refer to Figure 2 and Figure 3 By providing the return flow channel 20, the valve structure can be applied to a dual-valve fully automatic vibration damper. For example, the fully automatic vibration damper may include two valve structures, one of which may be referred to as a recovery valve structure, and the other as a compression valve structure. Of course, this valve structure can also be applied to a single-valve fully automatic vibration damper, and this disclosure does not limit it.

[0074] refer to Figure 2 and Figure 3 In some examples, the annular member 220 includes a second protrusion 221 that projects toward the connecting seat 210, and the biasing member 800 is fitted over the second protrusion 221. Thus, by providing the second protrusion 221, a mounting position can be provided for the biasing member 800. Furthermore, the second protrusion 221 can also guide the elastic deformation of the biasing member 800.

[0075] refer to Figure 2 and Figure 3 For example, on a reference plane perpendicular to axis AX, the orthographic projection of the side surface of the second protrusion 221 away from the first valve core 300 can be located between the orthographic projection of the return flow channel 20 and the orthographic projection of the channel opening 201, thereby providing sufficient installation space for the biasing member 800.

[0076] refer to Figure 3 and Figure 4 For example, the annular member 220 may also include a contact surface S protruding toward the first valve core 300, which is configured to contact or separate from the first valve core 300 to form a variable flow opening 01. For example, the contact surface S may protrude beyond other portions of the side surface of the annular member 220 facing the first valve core 300, thereby helping to reduce the contact area between the annular member 220 and the first valve core 300 to improve sealing performance. For example, in a direction parallel to the axis AX, the contact surface S may be disposed opposite to the second protrusion 221 to facilitate machining.

[0077] refer to Figure 2and Figure 3 For example, biasing element 800 may include a spring.

[0078] At least one embodiment of this disclosure provides a vibration damper that includes the valve structure in any of the above examples.

[0079] Since the vibration damper according to the embodiments of this disclosure includes the valve structure in the above example, it also has corresponding beneficial technical effects, which will not be described in detail here.

[0080] The following points need to be noted: The accompanying drawings of the embodiments of this disclosure only involve structures that are relevant to the embodiments of this disclosure, and other structures can be referred to in the general design; in the absence of conflict, features of the same embodiment and different embodiments of this disclosure can be combined with each other.

[0081] The above description is merely an exemplary embodiment of this disclosure and is not intended to limit the scope of protection of this disclosure, which is determined by the appended claims.

Claims

1. A valve structure, comprising: The valve sleeve has a fluid discharge passage, the outlet of which is directly connected to the external space; The valve seat structure is disposed opposite to the valve sleeve along the extension direction of the axis of the valve sleeve; A first valve core, at least partially located within the valve sleeve, is configured to reciprocate along the extension direction of the axis. The second valve core is located on the side of the first valve core away from the valve seat structure; An elastic structure is pre-compressed between the first valve core and the valve sleeve along the extension direction of the axis; the elastic structure includes two parts along the extension direction of the axis, the two parts having different stiffnesses; The second valve core is configured to move along the extension direction of the axis under the action of electromagnetic driving force to apply a force toward the valve seat structure to the first valve core. The valve seat structure includes a channel opening on the side away from the valve sleeve, and the valve structure includes a continuous flow channel from the surface of the first valve core toward the valve seat structure to the channel opening, wherein the flow cross-sectional area of ​​any segment of the continuous flow channel is greater than the area of ​​the channel opening. During its reciprocating motion, the first valve core forms a variable flow opening with the valve seat structure, and the continuous flow channel communicates with the fluid discharge channel through at least one of the variable flow opening and the internal flow channel of the first valve core. The valve seat structure includes a connecting seat and an annular component; The annular member is connected between the connecting seat and the valve sleeve, and in the extension direction of the axis, the annular member is opposite to the first valve core to form the variable flow opening; The continuous flow channel includes a first flow channel formed in the connecting seat and a second flow channel formed around the annular member, wherein the first flow channel and the second flow channel are connected. The valve structure also includes a second valve plate and a biasing component. A return flow channel is also provided on the connecting seat. The second valve plate is located at the outlet of the return flow channel. The biasing component is pre-pressed between the second valve plate and the annular component.

2. The valve structure according to claim 1, wherein, The elastic structure includes a first elastic element and a second elastic element. The second elastic element is located between the first elastic element and the first valve core in the extension direction of the axis, and the stiffness of the second elastic element is less than that of the first elastic element.

3. The valve structure according to claim 2, wherein, The outer diameter of the second elastic element is larger than that of the first elastic element.

4. The valve structure according to claim 2, wherein, The side of the first valve core facing the valve sleeve includes a recess and a positioning portion surrounding the recess; The second elastic element includes a first portion and a second portion surrounding the first portion, wherein the first portion overlaps with the recess on a reference plane perpendicular to the axis. The second part is connected to the positioning part; The first elastic element is connected between the first portion of the second elastic element and the valve sleeve, and the second elastic element includes a first valve plate.

5. The valve structure according to claim 2, wherein, In a direction parallel to the axis, the valve sleeve includes a first protrusion on the side facing the first valve core. The first protrusion surrounds the end of the first elastic element away from the second elastic element and is configured to guide the first elastic element to undergo elastic deformation along the axis.

6. The valve structure according to claim 1, wherein, The first valve core includes an extension extending along the extension direction of the axis, the internal flow channel is formed in the extension, and the elastic structure is sleeved on the outside of the extension; The first valve core further includes a mating portion surrounding the extension and a connecting portion connecting the mating portion and the extension, wherein the outer side of the mating portion mates with the inner side of the valve sleeve; and the mating portion overlaps with the extension in a direction perpendicular to the axis.

7. The valve structure according to claim 6, wherein, The connecting portion is connected between the end of the extension portion away from the second valve core and the end of the mating portion away from the second valve core.

8. The valve structure according to claim 6, wherein, Along the extension direction of the axis, the inlet of the internal flow channel is positioned opposite to the second valve core.

9. The valve structure according to claim 8, wherein, On a reference plane perpendicular to the axis, the orthographic projection of the inlet of the internal flow channel does not overlap with the orthographic projection of the elastic structure.

10. The valve structure according to claim 6, wherein, The valve structure also includes a sealing element, which is sleeved outside the mating part; In a direction perpendicular to the axis, the seal overlaps with the extension.

11. The valve structure according to claim 1, wherein, The outlet of the fluid discharge channel is located on the outer wall of the valve sleeve.

12. The valve structure according to claim 1, wherein, The axis passes through the continuous flow channel.

13. The valve structure according to claim 1, wherein, The annular component includes a second protrusion that protrudes toward the connecting seat, and the biasing component is sleeved over the second protrusion.

14. The valve structure according to claim 5, wherein, Along a direction parallel to the axis and from the valve sleeve to the channel opening of the valve seat structure, the outer diameter of the first protrusion gradually decreases.

15. A vibration damper comprising a valve structure according to any one of claims 1-14.

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