Flow adjusting device, shock absorber and vehicle

Abstract

The utility model relates to a flow adjusting device, a shock absorber and a vehicle, the flow adjusting device is arranged in a shell so as to at least divide the inner space of the shell into a first cavity and a second cavity, the flow adjusting device is provided with a first channel communicating with the first cavity and the second cavity, and the flow adjusting device comprises a valve seat, a valve rod and a valve rod, the valve element can move relative to the valve seat so as to adjust communication damping of the first channel; the valve plate is movably arranged between the valve seat and the valve core; the first elastic piece is used for applying first elastic force to the valve element, so that the valve element tends to be away from the valve seat; the second elastic piece is used for applying second elastic force to the valve plate, so that the valve plate has the tendency of abutting against the valve seat; the driving module is used for driving the valve element to move towards the valve seat. The flow adjusting device, the shock absorber and the vehicle have the beneficial effect that the flow adjusting flexibility is improved by arranging the valve plate and the valve element which can be independently adjusted.

Description

Technical Field

[0001] The present application relates to the technical field of shock absorbers, and particularly to a flow rate regulating device, a shock absorber and a vehicle. Background Art

[0002] In related technologies, a flow rate regulating valve generally includes a valve seat and a valve core. By controlling the position of the valve core relative to the valve seat, the flow rate of the fluid flowing through the flow rate regulating valve is adjusted. A channel for the fluid to pass through is formed between the valve core and the valve seat. However, the flexibility of this structural solution in regulating the flow rate of fluids in different flow states is poor. Summary of the Utility Model

[0003] An embodiment of the present application provides a flow rate regulating device, which improves the flexibility of flow rate regulation to at least partially solve the above technical problems.

[0004] To achieve the above object, according to the first aspect of the present application, a flow rate regulating device is provided. The flow rate regulating device is disposed in a housing to at least divide the internal space of the housing into a first chamber and a second chamber. The flow rate regulating device forms a first channel communicating the first chamber and the second chamber. The flow rate regulating device includes:

[0005] A valve seat;

[0006] A valve core, capable of moving relative to the valve seat to adjust the communication damping of the first channel;

[0007] A valve plate, movably disposed between the valve seat and the valve core;

[0008] A first elastic member, for applying a first elastic force to the valve core, so that the valve core has a tendency to move away from the valve seat;

[0009] A second elastic member, for applying a second elastic force to the valve plate, so that the valve plate has a tendency to abut against the valve seat;

[0010] A driving module, for driving the valve core to move towards the valve seat.

[0011] Optionally, the valve seat has:

[0012] A seat cavity, communicating with the second chamber;

[0013] Wherein, the seat cavity constitutes at least part of the first channel; the valve core moves relative to the valve seat between a first position and a second position;

[0014] When the valve core is in the first position, the valve plate is clamped between the valve core and the valve seat;

[0015] When the valve core is in the second position, the valve plate is separated from the valve core or the valve seat, and a second overflow channel communicating the seat cavity and the first cavity is formed between the valve core and the valve seat.

[0016] Optionally, the second overflow channel is formed between the valve core and the valve plate or between the valve seat and the valve plate;

[0017] When the valve plate is separated from the valve core, the second overflow channel is at least constituted by the distance between the valve core and the valve plate;

[0018] When the valve plate is separated from the valve seat, the second overflow channel is at least constituted by the distance between the valve core and the valve seat.

[0019] Optionally, the valve plate has:

[0020] A flow-through hole that axially penetrates the valve plate;

[0021] When the valve core is separated from the valve plate, the flow-through hole constitutes a part of the first channel, and the flow-through hole communicates between the first cavity and the seat cavity.

[0022] Optionally, when the valve core is in the first position, at least the valve seat forms a first overflow channel communicating the seat cavity and the first cavity.

[0023] Optionally, the valve seat has:

[0024] A flow-through opening that communicates between the seat cavity and the first cavity;

[0025] Wherein, the first overflow channel is at least constituted by the flow-through opening.

[0026] Optionally, the flow-through opening is formed at one end of the valve seat close to the valve plate.

[0027] Optionally, the valve core is configured to have a flow-stopping wall that can contact the end face of the valve plate; a core cavity surrounded by the flow-stopping wall is formed in the valve core, and the flow-through hole communicates between the core cavity and the seat cavity.

[0028] Optionally, the force-bearing area of the valve plate in the core cavity is smaller than the force-bearing area of the valve plate in the seat cavity.

[0029] Optionally, at least part of the flow-stopping wall axially protrudes to form a pointed end portion.

[0030] Optionally, the valve seat further has:

[0031] A flow-through groove formed at one end of the valve seat close to the valve core;

[0032] Among them, the overcurrent groove constitutes at least part of the seat cavity; the projection profile of the end of the pointed part close to the valve disc along the axial direction is inside the projection profile of the side wall of the overcurrent groove along the axial direction.

[0033] Optionally, the first elastic member and the second elastic member are respectively located in the core cavity.

[0034] Optionally, the valve core has:

[0035] A first communication flow channel for communicating with the first cavity;

[0036] A second communication flow channel for communicating with the core cavity;

[0037] A first transition cavity is arranged between the first communication flow channel and the second communication flow channel;

[0038] The driving module includes:

[0039] A pilot valve plug for at least controlling the communication or blockage between the first communication flow channel and the first transition cavity.

[0040] Optionally, the first communication flow channel includes:

[0041] A first overflow through hole extending along the axial direction of the valve core and communicating with the first cavity;

[0042] A second overflow through hole extending along the radial direction of the valve core and communicating with the first overflow through hole;

[0043] An overflow socket extending along the axial direction of the valve core, and the overflow socket is communicated between the second overflow through hole and the first transition cavity;

[0044] Among them, the overflow socket cooperates with the pilot valve plug to control the communication or blockage between the overflow socket and the first transition cavity.

[0045] Optionally, the flow regulating device further includes:

[0046] A first valve body having a third communication flow channel for communicating with the first cavity;

[0047] A second valve body having a fourth communication flow channel for communicating the first cavity with the seat cavity and / or the core cavity;

[0048] Among them, at least part of the valve core is slidably arranged in the first valve body, and a second transition cavity is formed between the valve core and the first valve body, and the second transition cavity is respectively communicated with the first communication flow channel and the third communication flow channel;

[0049] The first valve body and the second valve body are fixedly connected, and the valve seat is fixedly connected to the second valve body.

[0050] Optionally, the valve seat has or is connected with:

[0051] A conducting member, at least partially located between the valve seat and the valve core;

[0052] Wherein, the conducting member is respectively combined with the first elastic member and / or the second elastic member; the conducting member is fixed relative to the valve seat.

[0053] Optionally, the conducting member includes:

[0054] A first contact surface, contacting with the first elastic member;

[0055] A second contact surface, contacting with the second elastic member;

[0056] Wherein, the first contact surface and the second contact surface are oppositely arranged to respectively face the directions where the valve core and the valve seat are located.

[0057] Optionally, at least one of the first contact surface and the second contact surface is configured as an annular step surface.

[0058] Optionally, at least one of the first elastic member and the second elastic member is a helical spring;

[0059] One end of the first elastic member contacts with the first contact surface, and the other end of the first elastic member contacts with the valve core;

[0060] One end of the second elastic member contacts with the second contact surface, and the other end of the second elastic member contacts with the valve plate.

[0061] Optionally, the conducting member has:

[0062] A shoulder, located between the valve core and the valve plate;

[0063] Wherein, the first contact surface and the second contact surface are respectively formed on the axially opposite sides of the shoulder.

[0064] Optionally, the valve plate has:

[0065] A guiding hole, at least part of the conducting member passes through the guiding hole to form a sliding connection;

[0066] Wherein, the guiding hole axially penetrates through the valve plate.

[0067] According to the second aspect of the present application, a shock absorber is provided, including:

[0068] A housing;

[0069] The flow regulating device as described above, at least used for dividing the internal space of the housing into a first chamber and a second chamber;

[0070] A piston valve, movably arranged in the housing to change the states of the first chamber and the second chamber when the piston valve moves;

[0071] Wherein, the flow rate regulating device is connected to the piston valve to move synchronously with the piston valve.

[0072] Optionally, the shock absorber further includes:

[0073] A piston rod, at least partially movably arranged in the housing;

[0074] Wherein, the flow rate regulating device is connected between the piston rod and the piston valve; at least part of the driving module is arranged inside the piston rod.

[0075] According to a third aspect of the present application, there is also provided a vehicle, including the shock absorber as described above.

[0076] The beneficial effects of the present application are as follows: A flow rate regulating device, a shock absorber and a vehicle are provided, which improve the flexibility of flow rate regulation by setting a valve plate and a valve core that can be independently adjusted.

[0077] More specifically, some embodiments of the present application may produce the following specific beneficial effects:

[0078] By setting a first elastic member and a second elastic member to apply elastic forces to the valve core and the valve plate respectively, the valve core and the valve plate can independently adjust their positions. Among them, the movement of the valve core can adjust the communication damping of the first channel, and the movement of the valve plate makes the first channel have different structural forms. For example, a part of the first channel is formed between the valve plate and the valve seat or a part of the first channel is formed between the valve plate and the valve core to adapt to different fluid flow states, such as the fluid flow direction, thereby improving the flexibility of flow rate regulation.

[0079] Other features and advantages of the present application will be described in detail in the subsequent specific implementation section. Description of the Drawings

[0080] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative efforts.

[0081] In order to more comprehensively understand the present application and its beneficial effects, the following description will be made in conjunction with the drawings, where the same reference numerals in the following description represent the same parts.

[0082] Figure 1It is a schematic diagram of the overall structure of a shock absorber provided in an exemplary embodiment of the present application;

[0083] Figure 2 is Figure 1 an enlarged schematic diagram of part A in;

[0084] Figure 3 It is a schematic diagram of a first flow rate regulating device provided in an exemplary embodiment of the present application in a first state;

[0085] Figure 4 It is a schematic diagram of a first flow rate regulating device provided in an exemplary embodiment of the present application in a second state;

[0086] Figure 5 It is a schematic diagram of a first flow rate regulating device provided in an exemplary embodiment of the present application in a third state;

[0087] Figure 6 It is a three-dimensional view of a valve plate in a first flow rate regulating device provided in an exemplary embodiment of the present application;

[0088] Figure 7 It is a schematic diagram of a first flow rate regulating device provided in an exemplary embodiment of the present application showing the connection relationship between a limit pin, an elastic member and a valve plate;

[0089] Figure 8 It is a three-dimensional view of a valve seat in a first flow rate regulating device provided in an exemplary embodiment of the present application;

[0090] Figure 9 It is a three-dimensional view of a valve core in a first flow rate regulating device provided in an exemplary embodiment of the present application;

[0091] Figure 10 It is a cross-sectional view of a valve core in a first flow rate regulating device provided in an exemplary embodiment of the present application;

[0092] Figure 11 It is another cross-sectional view of a valve core in a first flow rate regulating device provided in an exemplary embodiment of the present application;

[0093] Figure 12 It is a three-dimensional view of a first flow rate regulating device provided in an exemplary embodiment of the present application showing the connection relationship between a first valve body and a second valve body;

[0094] Figure 13 It is a cross-sectional view of a first flow rate regulating device provided in an exemplary embodiment of the present application showing the connection relationship between a first valve body and a second valve body;

[0095] Figure 14It is a perspective view of the second valve body in the first flow rate regulating device provided in the exemplary embodiment of the present application;

[0096] Figure 15 It is a perspective view of the first valve body in the first flow rate regulating device provided in the exemplary embodiment of the present application;

[0097] Figure 16 It is a sectional view of the first valve body in the first flow rate regulating device provided in the exemplary embodiment of the present application;

[0098] Figure 17 It is a schematic diagram of the overall structure of a shock absorber including the second flow rate regulating device provided in the exemplary embodiment of the present application;

[0099] Figure 18 It is Figure 17 An enlarged schematic view of part B in;

[0100] Figure 19 It is a schematic diagram of the overall structure of the second flow rate regulating device provided in the exemplary embodiment of the present application;

[0101] Figure 20 It is a schematic diagram showing the connection relationship between the valve plate, the limit pin and the locking rod in the second flow rate regulating device provided in the exemplary embodiment of the present application;

[0102] Figure 21 It is a perspective view of the locking rod in the second flow rate regulating device provided in the exemplary embodiment of the present application;

[0103] Figure 22 It is a perspective view of the valve plate in the second flow rate regulating device provided in the exemplary embodiment of the present application;

[0104] Figure 23 It is a sectional view of a part of the shock absorber provided in the exemplary embodiment of the present application;

[0105] Figure 24 It is another sectional view of a part of the shock absorber provided in the exemplary embodiment of the present application;

[0106] Figure 25 It is a perspective view of the magnetic core and the pilot valve plug in the shock absorber provided in the exemplary embodiment of the present application;

[0107] Figure 26 It is a sectional view of the magnetic core and the pilot valve plug in the shock absorber provided in the exemplary embodiment of the present application;

[0108] Figure 27 It is a schematic diagram of the structure of the iron core cover and the first guide sleeve in the shock absorber provided in the exemplary embodiment of the present application;

[0109] Figure 28 It is a schematic structural diagram of a piston rod in a shock absorber provided in an exemplary embodiment of the present application;

[0110] Figure 29 It is a schematic diagram of the fluid flow direction when the shock absorber provided in an exemplary embodiment of the present application is in an unpowered state and the piston rod moves upward to recover;

[0111] Figure 30 It is a schematic diagram of the fluid flow direction when the shock absorber provided in an exemplary embodiment of the present application is in an unpowered state and the piston rod moves downward to compress;

[0112] Figure 31 It is a schematic diagram of the fluid flow direction from the first stage to the second stage when the shock absorber provided in an exemplary embodiment of the present application is in a powered state and the piston rod moves upward to recover;

[0113] Figure 32 It is a schematic diagram of the fluid flow direction in the third stage when the shock absorber provided in an exemplary embodiment of the present application is in a powered state and the piston rod moves upward to recover;

[0114] Figure 33 It is a schematic diagram of the fluid flow direction in the first stage when the shock absorber provided in an exemplary embodiment of the present application is in a powered state and the piston rod moves downward to compress;

[0115] Figure 34 It is a schematic diagram of the fluid flow direction in the second stage when the shock absorber provided in an exemplary embodiment of the present application is in a powered state and the piston rod moves downward to compress;

[0116] Figure 35 It is a schematic diagram of the overall structure of a vehicle provided in an exemplary embodiment of the present application.

[0117] Description of reference numerals:

[0118] 100, flow regulating device;

[0119] 100a, first overflow channel; 100b, second overflow channel; 100d, overflow space;

[0120] 110, valve seat; 111, seat cavity; 112, flow-through opening; 113, flow-through groove; 114, third external thread portion;

[0121] 120, valve core; 121, flow-stop wall; 121a, core cavity; 122, pointed end portion; 123, outer edge portion; 123a, first transition cavity;

[0122] 124, first communication flow channel; 124a, first overflow through hole; 124b, second overflow through hole; 124c, overflow socket;

[0123] 125. Second communication flow channel; 126. Matching sealing surface;

[0124] 130. Valve disc; 131. Guide hole; 132. Flow-through hole;

[0125] 141. First elastic member; 142. Second elastic member;

[0126] 151. Limit pin; 151a. First contact surface; 151b. Second contact surface; 151c. Shoulder; 151d. Connection part;

[0127] 152. Locking rod;

[0128] 160. First valve body; 161. First external thread part; 162. First fixing surface; 163. Flange part; 163a. Second transition cavity; 164. Third communication flow channel; 165. Guide valve hole; 166. Conical surface boss;

[0129] 170. Second valve body; 171. Second external thread part; 172. Second fixing surface; 173. First internal thread part; 174. Fourth communication flow channel;

[0130] C1. Central axis;

[0131] 200. Flow rate regulating device;

[0132] 210. Valve seat; 220. Valve core; 221. Positioning column;

[0133] 230. Valve disc; 231. Guide hole; 232. Flow-through hole; 234. Avoidance hole;

[0134] 241. First elastic member; 242. Second elastic member;

[0135] 251. Limit pin; 251a. Support boss; 251b. Second contact surface;

[0136] 252. Locking rod; 252a. Guide piece; 252b. First contact surface; 252c. Accommodating space;

[0137] 10. Shock absorber;

[0138] 301. Housing; 310. Outer housing; 320. Inner housing;

[0139] 331. Piston rod; 331a. Installation cavity; 331b. Second internal thread part; 331c. Side through hole;

[0140] 332. Piston valve; 333. Bottom valve;

[0141] 300a. Liquid storage cavity; 300b. Second cavity; 300c. First cavity;

[0142] 340. Driving module;

[0143] 341. Magnetic isolation ring; 341a. Limit groove; 341b. Sealing assembly groove;

[0144] 342. Matching sealing ring; 346. Pilot valve plug; 346a. Pilot sealing surface; 347. Coil;

[0145] 351. First guide sleeve; 352. Second guide sleeve; 353. Third elastic member; 354. Fourth elastic member;

[0146] 361. Coil bracket; 361a. Central column; 362. Coil plastic cap; 362a. Central hole; 363. Coil metal cap;

[0147] 370. Iron core cover; 371. Positioning boss; 370a. First chamber; 370b. Second chamber; 370c. Guide groove;

[0148] 380. Magnetic core; 381. First core body; 382. Second core body; 380a. First installation groove; 380b. Second installation groove; 380c. Vent hole; 380d. Ventilation channel;

[0149] 1. Vehicle. Specific embodiments

[0150] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts fall within the protection scope of the present application.

[0151] According to the first aspect of the present application, referring to Figures 1 to 5 as shown, the present application provides a flow rate regulating device 100. The flow rate regulating device 100 is disposed in a housing 301 to at least divide the internal space of the housing 301 into a first chamber 300c and a second chamber 300b. For example, when the flow rate regulating device 100 of the present application is applied to a shock absorber 10, the first chamber 300c may be a rebound chamber, and the second chamber 300b may be a compression chamber. The flow rate regulating device 100 is formed with a first channel communicating the first chamber 300c and the second chamber 300b. The flow rate regulating device 100 includes: a valve seat 110, a valve core 120, a valve plate 130, and a second elastic member 142.

[0152] The valve core 120 can move relative to the valve seat 110 to adjust the connection damping of the first channel; it can be understood that the valve core 120 and the valve seat 110 can move in a trend of approaching or moving away from the valve seat 110, so that the valve core 120 and the valve seat 110 have different spacings.

[0153] The valve plate 130 is movably arranged between the valve seat 110 and the valve core 120; the second elastic member 142 is used to apply a second elastic force to the valve plate 130, so that the valve plate 130 has a tendency to abut against the valve seat 110. It can be understood that when the acting force of the fluid on the valve plate 130 is greater than the second elastic force, it can also overcome the second elastic force and push the valve plate 130 to move away from the valve seat 110.

[0154] By adopting the above technical solution, on the basis that the valve core 120 can move relative to the valve seat 110 to adjust the connection damping of the first channel, by arranging a movable valve plate 130 between the valve seat 110 and the valve core 120, and arranging the second elastic member 142 to independently apply an elastic force to the valve plate 130, the valve core 120 and the valve plate 130 can respectively adjust their positions. Under the action of the fluid, the valve plate 130 has different positions, so that the first channel has different structural forms to adapt to different fluid flow states, thereby improving the flexibility of flow regulation.

[0155] Exemplarily, referring to Figure 5 and Figure 29 As shown, when the fluid flows from the first chamber 300c to the second chamber 300b, the acting force of the fluid on the valve plate 130 is in the same direction as the second elastic force, the valve plate 130 abuts against the valve seat 110, and a part of the first channel is formed between the valve plate 130 and the valve core 120. Referring to Figure 4 and Figure 30 As shown, when the fluid flows from the second chamber 300b to the first chamber 300c, the acting force of the fluid on the valve plate 130 is opposite to the direction of the second elastic force, the valve plate 130 abuts against the valve core 120, and at this time a part of the first channel is formed between the valve plate 130 and the valve seat 110. At the same time, the acting force of the fluid on the valve plate 130 also helps to push the valve core 120 to move away from the valve seat 110, which is beneficial to the opening of the first channel.

[0156] In some embodiments, referring to Figures 1 to 5 As shown, the flow rate regulating device 100 further includes: a first elastic member 141 and a driving module 340.

[0157] The first elastic member 141 is used to apply a first elastic force to the valve core 120, so that the valve core 120 has a tendency to move away from the valve seat 110; the driving module 340 is used to drive the valve core 120 to move towards the valve seat 110.

[0158] It can be understood that when only the first elastic force acts on the valve core 120, the valve core 120 is in the first position; when the driving module 340 acts on the valve core 120, the valve core 120 is in the second position.

[0159] By providing the first elastic member 141 and the second elastic member 142, elastic forces are respectively applied to the valve core 120 and the valve plate 130, so that the valve core 120 and the valve plate 130 can independently adjust their respective positions.

[0160] In some embodiments, referring to Figures 1 to 5 as shown, the valve seat 110 has: a seat cavity 111.

[0161] The seat cavity 111 axially penetrates the valve seat 110 and communicates with the second cavity 300b; the seat cavity 111 constitutes at least part of the first channel; the valve core 120 moves relative to the valve seat 110 between the first position and the second position.

[0162] When the valve core 120 is in the first position, the valve plate 130 is clamped between the valve core 120 and the valve seat 110. At this time, the first channel is closed, or the seat cavity 111 communicates with the first cavity 300c through the first overflow channel 100a. At this time, the fluid in the first cavity 300c and the second cavity 300b flows through the first overflow channel 100a at a first flow rate.

[0163] When the valve core 120 is in the second position, the valve plate 130 is separated from the valve core 120 or the valve seat 110, and a second overflow channel 100b communicating the seat cavity 111 and the first cavity 300c is formed between the valve core 120 and the valve seat 110. At this time, the fluid in the first cavity 300c and the second cavity 300b flows through the second overflow channel 100b at a second flow rate.

[0164] With such a solution, by cooperating with the position adjustment of the seat cavity 111 and the valve core 120, different opening degrees can be formed between the seat cavity 111 and the first cavity 300c (that is, between the second cavity 300b and the first cavity 300c). That is, the fluid between the first cavity 300c and the second cavity 300b can be exchanged at different flow rates, improving the flow rate adjustment ability and meeting the requirements of various vibration damping working conditions.

[0165] In some embodiments, referring to Figure 4 and Figure 5 as shown, the second overflow channel 100b is formed between the valve core 120 and the valve plate 130 or between the valve seat 110 and the valve plate 130;

[0166] When the valve plate 130 is separated from the valve core 120, the second overflow channel 100b is at least constituted by the distance between the valve core 120 and the valve plate 130; when the valve plate 130 is separated from the valve seat 110, the second overflow channel 100b is at least constituted by the distance between the valve core 120 and the valve seat 110.

[0167] With such a solution, by setting the movable valve plate 130, a second overflow channel 100b is formed between the valve core 120 and the valve plate 130 or between the valve core 120 and the valve seat 110, which can adapt to different fluid states. When the fluid flows from the first chamber 300c to the second chamber 300b, the second overflow channel 100b is formed between the valve core 120 and the valve plate 130. When the fluid flows from the second chamber 300b to the first chamber 300c, the second overflow channel 100b is formed between the valve core 120 and the valve plate 130. At this time, the fluid in the seat chamber 111 directly enters the second chamber 300b along the second overflow channel 100b, without flowing through the flow hole 132 of the valve plate 130 and the core cavity 121a of the valve core 120, avoiding the generation of additional flow resistance.

[0168] As a preferred solution, referring to Figures 3 to 5 As shown, the valve core 120 can slide relative to the valve seat 110 along the central axis C1; the valve plate 130 can slide relative to the valve core 120 along the central axis C1; with such a setting, the movements of the valve core 120 and the valve plate 130 are on the same central axis C1, the positions are relatively concentrated, the structure is compact, and at the same time, it helps to improve the stability and reliability during the working process and reduce the vibration and noise caused by unbalanced forces.

[0169] In some embodiments, referring to Figure 3 and Figure 6 As shown, the valve plate 130 has: a flow hole 132.

[0170] The flow hole 132 axially penetrates the valve plate 130; when the valve core 120 is separated from the valve plate 130, the flow hole 132 constitutes a part of the first channel, and the flow hole 132 communicates between the first chamber 300c and the seat chamber 111. Optionally, a plurality of flow holes 132 are circumferentially spaced.

[0171] Through the setting of the flow hole 132, the two sides of the valve plate 130 in the axial direction allow the flow of fluid, and at the same time, the pressures of the fluid on both sides of the valve plate 130 are kept equal.

[0172] In some embodiments, referring to Figure 3 As shown, when the valve core 120 is in the first position, at least the first overflow channel 100a communicating the seat chamber 111 and the first chamber 300c is formed by the valve seat 110. At this time, the fluids in the first chamber 300c and the second chamber 300b flow through the first overflow channel 100a at a first flow rate.

[0173] It can be understood that the first overflow channel 100a can be formed by the valve seat 110, or the first overflow channel 100a can be formed by the cooperation of the valve seat 110 and the valve plate 130.

[0174] Specifically, the second flow rate is greater than the first flow rate.

[0175] In some embodiments, referring to Figure 2 and Figure 8 as shown, the valve seat 110 has: a flow-through opening 112. The flow-through opening 112 communicates between the seat cavity 111 and the first cavity 300c; the first overflow channel 100a is at least constituted by the flow-through opening 112.

[0176] It can be understood that the flow-through opening 112 can be disposed between the valve seat 110 and the valve plate 130, or the flow-through opening 112 is completely disposed inside the valve seat 110.

[0177] In some embodiments, referring to Figure 2 and Figure 8 as shown, the flow-through opening 112 is formed at one end of the valve seat 110 close to the valve plate 130. Thus, when the valve core 120, the valve plate 130, and the seat core are abutted in sequence, the first overflow channel 100a can be formed to communicate the seat cavity 111 and the first cavity 300c.

[0178] In some embodiments, referring to Figure 2 , Figure 3 and Figure 10 as shown, the valve core 120 is configured to have a flow-stopping wall 121 that can contact the end face of the valve plate 130; a core cavity 121a surrounded by the flow-stopping wall 121 is formed in the valve core 120, and a flow-through hole 132 communicates between the core cavity 121a and the seat cavity 111. Through the setting of the core cavity 121a, a pressure accumulation space is formed. When the fluid pressure in the core cavity 121a accumulates to a certain value, the valve core 120 can be pushed to move against the action of the driving module 340.

[0179] In some embodiments, referring to Figure 2 and Figure 3 as shown, the force-bearing area of the valve plate 130 in the core cavity 121a is smaller than the force-bearing area of the valve plate 130 in the seat cavity 111. Thus, since the core cavity 121a communicates with the seat cavity 111, when the fluid flow between the two is slow or there is no flow, the fluid pressures in the core cavity 121a and the seat cavity 111 are approximately equal. Under the limitation that the force-bearing area of the valve plate 130 in the core cavity 121a is smaller than the force-bearing area of the valve plate 130 in the seat cavity 111, the pressure of the fluid in the seat cavity 111 on the valve plate 130 is greater than the pressure of the fluid in the core cavity 121a on the valve plate 130, that is, the fluid generates a resultant force on the valve plate 130 toward the valve core 120, and this resultant force increases with the increase of the pressures in the seat cavity 111 and the core cavity 121a. This part of the resultant force helps to push the valve core 120 away from the valve seat 110, thereby opening the second overflow channel 100b.

[0180] In some embodiments, referring to Figure 2As shown in the figure, at least a part of the flow stop wall 121 protrudes axially to form a pointed end 122. The pointed end 122 can abut against the valve plate 130 and the valve seat 110 to close the second overflow channel 100b, or be spaced apart from the valve plate 130 by a certain distance to form the second overflow channel 100b. At the same time, the setting of the pointed end 122 can reduce the radial channel length of the second overflow channel 100b formed between the valve core 120 and the valve plate 130, and reduce the damping of the second overflow channel 100b.

[0181] In some embodiments, referring to Figure 2 and Figure 3 as shown, the valve seat 110 further has: a flow-through groove 113.

[0182] The flow-through groove 113 is formed at one end of the valve seat 110 close to the valve core 120; wherein, the flow-through groove 113 constitutes at least a part of the seat cavity 111; the axial projection profile of the end of the pointed end 122 close to the valve plate 130 is inside the axial projection profile of the side wall of the flow-through groove 113.

[0183] By providing the flow-through groove 113, it is ensured that the fluid between the valve plate 130 and the seat cavity 111 has a larger contact area than that in the core cavity 121a, so that the force-bearing area of the valve plate 130 in the core cavity 121a is smaller than the force-bearing area of the valve plate 130 in the seat cavity 111.

[0184] As a specific solution, the flow-through groove 113 is formed by inwardly concaving one end of the valve seat 110 close to the valve core 120, and at least a part of the flow-through groove 113 is located at the same axial position as the flow-through notch, so as to reduce the thickness of the side wall of the valve seat 110 corresponding to the flow-through notch, and further reduce the radial length of the flow-through notch, thereby reducing the pressure loss of the fluid passing through the flow-through notch and the change in flow velocity, making the fluid flow in the flow-through notch more stable.

[0185] In some embodiments, referring to Figure 2 and Figure 3 as shown, the first elastic member 141 and the second elastic member 142 are respectively located in the core cavity 121a. Thus, by arranging the first elastic member 141 and the second elastic member 142 in the core cavity 121a, the overall axial total length of the valve seat 110, the valve core 120, and the first elastic member 141 and the second elastic member 142 is reduced, and the structure is compact.

[0186] In some embodiments, referring to Figure 2 、 Figures 9 to 11 as shown, the valve core 120 has: a first communication flow channel 124, a second communication flow channel 125, and a first transition cavity 123a.

[0187] The first communication flow channel 124 is used to communicate with the first chamber 300c; the second communication flow channel 125 is used to communicate with the core chamber 121a; the first transition chamber 123a is arranged between the first communication flow channel 124 and the second communication flow channel 125; the valve core 120 further has an outer edge portion 123, and the first transition chamber 123a is formed by surrounding the outer edge portion 123, and the first transition chamber 123a is located at one end of the valve core 120 away from the core chamber 121a. The first transition chamber 123a cooperates with a pilot valve plug 346 to control the communication or blockage between the first communication flow channel 124 and the first transition chamber 123a.

[0188] Adopting such a scheme, through the arrangement of the first communication flow channel 124, the second communication flow channel 125 and the first transition chamber 123a, when the fluid pressure in the first chamber 300c is greater than the set threshold value, the pilot valve plug 346 can be pushed to make the first communication flow channel 124 communicate with the first transition chamber 123a, so that the first communication flow channel 124, the first transition chamber 123a and the second communication flow channel 125 form a second channel communicating the first chamber 300c and the second chamber 300b, meeting different flow rate adjustment requirements.

[0189] In some embodiments, referring to Figure 2 、 Figures 9 to 11 as shown, the first communication flow channel 124 includes: a first overflow through hole 124a, a second overflow through hole 124b and an overflow socket.

[0190] The first overflow through hole 124a extends along the axial direction of the valve core 120 and communicates with the first chamber 300c; the second overflow through hole 124b extends along the radial direction of the valve core 120 and communicates with the first overflow through hole 124a; the overflow socket extends along the axial direction of the valve core 120 and the overflow socket is communicated between the second overflow through hole 124b and the first transition chamber 123a; wherein, the overflow socket cooperates with the pilot valve plug 346 to control the communication or blockage between the overflow socket and the first transition chamber 123a.

[0191] As a specific scheme, the number of the first overflow through holes 124a is twice the number of the second overflow through holes 124b, and multiple first overflow through holes 124a are arranged at different circumferential positions. The first overflow through hole 124a extends along the axial direction, and one end is axially open. Both ends of the second overflow through hole 124b penetrate through the side wall of the valve core 120 along the radial direction, which is convenient for the processing of the second overflow through hole 124b. One end of the overflow socket axially penetrates through the bottom wall of the first transition chamber 123a to communicate with the first transition chamber 123a, and the other end is communicated with the second overflow through hole 124b.

[0192] There are multiple second communication flow channels 125, and the multiple second communication flow channels 125 are arranged at different circumferential positions and penetrate through the valve core 120 axially to communicate the first transition chamber 123a and the core chamber 121a.

[0193] In some embodiments, referring to Figure 2 , Figures 9 to 11 and Figure 26 as shown, the overflow jack 124c cooperates with the pilot valve plug 346 to enable the pilot valve plug 346 to close or open the overflow jack 124c. The pilot valve plug 346 is provided with a pilot sealing surface 346a. Correspondingly, the inner wall of the valve core 120 forming the overflow jack 124c has a mating sealing surface 126. The pilot sealing surface 346a can contact the mating sealing surface 126 to prevent the communication between the overflow jack 124c and the first transition cavity 123a.

[0194] In some embodiments, referring to Figure 2 , Figures 12 to 16 as shown, the flow regulating device 100 further includes: a first valve body 160 and a second valve body 170.

[0195] The first valve body 160 and the second valve body 170 are fixedly connected, and the valve seat 110 is fixedly connected to the second valve body 170. The first valve body 160 is provided with a first external thread portion 161. The first valve body 160 is fixedly connected to the piston rod 331 by means of threaded connection at the first external thread portion 161. A first fixing surface 162 is further provided on the outer side wall of the first valve body 160. Correspondingly, the second valve body 170 is provided with a second external thread portion 171. The second valve body 170 is fixedly connected to the piston valve 332 by means of threaded connection at the second external thread portion 171. And a second fixing surface 172 matching the first fixing surface 162 is provided on the inner side wall of the second valve body 170. At least part of the first fixing surface 162 is inserted into the space surrounded by the second fixing surface 172, and the first fixing surface 162 and the second fixing surface 172 are mutually attached. Optionally, the first fixing surface 162 and the second fixing surface 172 are in interference fit.

[0196] Through the arrangement of the first valve body 160 and the second valve body 170, the first valve body 160 and the second valve body 170 are mutually enclosed to form an overflow space 100d. The valve core 120, the valve plate 130 and the valve seat 110 are arranged in the overflow space 100d, and the valve seat 110 is fixedly connected to the second valve body 170. The valve core 120 and the valve plate 130 can move axially.

[0197] Specifically, the second valve body 170 is further provided with a first internal thread portion 173, and the valve seat 110 is provided with a third external thread portion 114 matching the first internal thread portion 173, so that the second valve body 170 can be fixedly connected to the valve seat 110 by means of threaded connection.

[0198] In some embodiments, referring to Figure 2 , Figure 3 and Figure 16As shown, the first valve body 160 has a third communication flow channel 164 for communicating with the first chamber 300c. At least a part of the valve core 120 is slidably disposed in the first valve body 160. A second transition chamber 163a is formed between the valve core 120 and the first valve body 160. The second transition chamber 163a communicates with the first communication flow channel 124 and the third communication flow channel 164 respectively.

[0199] Specifically, the first valve body 160 further forms a flange portion 163 protruding into the overflow space 100d. At least a part of the flange portion 163 is inserted into the first transition chamber 123a. The outer wall of the flange portion 163 and the peripheral side wall of the first transition chamber 123a form a sealing fit, which may specifically be an interference fit or be sealed by an O-ring. At the same time, through the cooperation of the outer edge portion 123 and the flange portion 163, a second transition chamber 163a is further formed on the radially outer side of the first transition chamber 123a.

[0200] The outer wall of the valve core 120 also forms a sealing fit with the inner wall of the first valve body 160, which may specifically be an interference fit or be sealed by an O-ring.

[0201] In some embodiments, referring to Figure 2 、 Figures 12 to 14 As shown, the second valve body 170 has a fourth communication flow channel 174 for communicating the first chamber 300c with the seat chamber 111 and / or the core chamber 121a, that is, the fourth communication flow channel 174 communicates with the first overflow channel 100a or the second overflow channel 100b, and further communicates with the seat chamber 111 or the core chamber 121a.

[0202] Referring to Figure 2 、 Figures 12 to 14 , a plurality of fourth communication flow channels 174 are provided on the side wall of the second valve body 170. The fourth communication flow channels 174 communicate the overflow space 100d and the first chamber 300c, so that the seat chamber 111 can communicate with the first chamber 300c through the first overflow channel 100a or the second overflow channel 100b.

[0203] Through the arrangement of the above-mentioned communication flow channels, when the pressure of the fluid in the first chamber 300c is greater than the pressure of the fluid in the second chamber 300b, and the valve core 120, the valve disc 130 and the valve seat 110 are in contact with each other, the fluid in the first chamber 300c enters the second transition chamber 163a and the first communication flow channel 124 through the third communication flow channel 164, so that the pressure in the second transition chamber 163a and the first communication flow channel 124 increases, pushing open the pilot valve plug 346 to communicate the first communication flow channel 124 and the first transition chamber 123a. Then, the fluid sequentially passes through the first transition chamber 123a, the second communication flow channel 125, the core chamber 121a and the flow hole 132 and enters the seat chamber 111.

[0204] When the pressure of the fluid in the second chamber 300b is greater than the pressure of the fluid in the first chamber 300c, and the valve core 120, the valve plate 130 and the valve seat 110 are in contact, as the pressure accumulates in the core chamber 121a and the seat chamber 111, the valve plate 130, the valve core 120 and the pilot valve plug 346 can be pushed to move axially to open the second overflow channel 100b between the valve seat 110 and the valve plate 130, and the fluid in the seat chamber 111 can enter the first chamber 300c through the second overflow channel 100b.

[0205] In some embodiments, referring to Figure 7 as shown, at least one of the first elastic member 141 and the second elastic member 142 is a helical spring.

[0206] As a preferred solution, the first elastic force exerted by the first elastic member 141 and the second elastic force exerted by the second elastic member 142 are different. It can be understood that the first elastic member 141 and the second elastic member 142 have different spring coefficients, or the first elastic member 141 and the second elastic member 142 have different spring lengths; or the first elastic member 141 and the second elastic member 142 have different spring outer diameters.

[0207] In some embodiments, referring to Figure 2 、 Figure 3 and Figure 7 as shown, the valve seat 110 has or is connected with: a conducting member.

[0208] At least part of the conducting member is located between the valve seat 110 and the valve core 120; the conducting member is respectively combined with the first elastic member 141 and the second elastic member 142. And the conducting member is fixed relative to the valve seat 110, so that both the valve seat 110 and the valve core 120 are independently adjusted based on the valve seat 110, ensuring that the valve core 120 and the valve plate 130 work stably at the expected positions or have the expected motion forms.

[0209] Specifically, a part of the conducting member is located in the core chamber 121a, reducing the total axial length of the conductor and the valve core 120, and the structure is compact.

[0210] In some embodiments, referring to Figure 2 、 Figure 3 and Figure 7 as shown, the conducting member includes: a first contact surface 151a and a second contact surface 151b.

[0211] The first contact surface 151a is in contact with the first elastic member 141; the second contact surface 151b is in contact with the second elastic member 142; the first contact surface 151a and the second contact surface 151b are oppositely arranged to face the directions where the valve core 120 and the valve seat 110 are located respectively.

[0212] By arranging two relatively arranged contact surfaces on the conducting member to cooperate with the elastic member, the first elastic member 141 and the second elastic member 142 can be as close as possible, making the structure compact.

[0213] Through the cooperation of the first elastic member 141, the second elastic member 142 and the conducting member, while the conducting member provides a butt joint basis for the two elastic members respectively, it can limit the first elastic member 141 and the second elastic member 142 respectively, improving the stability when the first elastic member 141 and the second elastic member 142 are compressed.

[0214] In some embodiments, at least one of the first contact surface 151a and the second contact surface 151b is configured as an annular stepped surface. With this design, stable contact can be provided for the first elastic member 141 and the second elastic member 142 at different positions in the circumferential direction, ensuring the stability of the first elastic member 141 and the second elastic member 142.

[0215] Exemplarily, referring to Figure 7 As shown, the first contact surface 151a and the second contact surface 151b form an annular stepped structure. In this way, the cooperation with the first elastic member 141 and the second elastic member 142 can be realized through an annular stepped structure, with a simple structure and facilitating the assembly of the first elastic member 141 and the second elastic member 142.

[0216] In some embodiments, referring to Figure 7 As shown, the conducting member has: a shoulder 151c. The shoulder 151c is located between the valve core 120 and the valve disc 130; the first contact surface 151a and the second contact surface 151b are respectively formed on the axially opposite sides of the shoulder 151c. That is to say, in this embodiment, the first elastic member 141 and the second elastic member 142 cooperate with the same conducting member. In this way, there is only one positioning reference for the first elastic member 141 and the second elastic member 142, reducing the assembly and positioning processes of the conducting member and the two elastic members.

[0217] In some embodiments, referring to Figure 3 and Figure 7 As shown, the conducting member further includes: a connecting portion 151d.

[0218] The connecting portion 151d is used to form a fixed connection with the valve seat 110. It can be understood that the conducting member is directly or indirectly fixed to the valve seat 110.

[0219] Exemplarily, referring to Figure 1 and Figure 2 As shown, the conducting member is fixed to a piston valve 332, and the valve seat 110 is fixed to the piston valve 332, thus constituting the relative fixation of the conducting member and the valve seat 110.

[0220] In some embodiments, one end of the first elastic member 141 contacts the first contact surface 151a, and the other end of the first elastic member 141 contacts the valve core 120; one end of the second elastic member 142 contacts the second contact surface 151b, and the other end of the second elastic member 142 contacts the valve disc 130.

[0221] Exemplarily, referring to Figure 2 , Figure 3 and Figure 7 as shown, the conducting member includes a limit pin 151 and a locking rod 152. One end of the limit pin 151 is provided with a connecting portion 151d, and the connecting portion 151d is threadedly connected to one end of the locking rod 152. The other end of the locking rod 152 is fixedly connected to the piston valve 332, and the valve seat 110 is fixed to the piston valve 332, thus forming the relative fixation between the limit pin 151 and the valve seat 110. The first contact surface 151a and the second contact surface 151b are simultaneously formed on the limit pin 151. The first elastic member 141 is located between the first contact surface 151a and the valve core 120, and the second elastic member 142 is located between the second contact surface 151b and the valve disc 130.

[0222] In some embodiments, referring to Figure 6 as shown, the valve disc 130 has a guiding hole 131. The guiding hole 131 axially penetrates the valve disc 130, and at least part of the conducting member passes through the guiding hole 131 to form a sliding connection.

[0223] In some embodiments, referring to Figures 17 to 20 as shown, the conducting member includes a locking rod 252 and a limit pin 251.

[0224] The limit pin 251 and the locking rod 252 are respectively fixed relative to the valve seat 210. The locking rod 252 is formed with a first contact surface 252b to contact the first elastic member 241; the limit pin 251 is formed with a second contact surface 251b to contact the second elastic member 242.

[0225] Specifically, the limit pin 251 and the locking rod 252 are fixedly connected, and the locking rod 252 is fixed to the piston valve, and the valve seat 210 is fixed to the piston valve, thus forming the relative fixation between the locking rod 252 and the valve seat 210, and the relative fixation between the limit pin 251 and the valve seat 210.

[0226] In some embodiments, referring to Figures 18 to 20 as shown, the first contact surface 252b is located between the second contact surface 251b and the valve core 220. That is, by defining the relative positions of the first contact surface 252b and the second contact surface 251b, the first elastic member 241 is located between the second elastic member 242 and the valve core 220.

[0227] In some embodiments, the valve plate 230 is slidably connected to the valve seat 210 by a locking member and / or a positioning pin 251. In this way, the movement of the valve plate 230 is guided by the locking rod 252 or the positioning pin 251.

[0228] In some embodiments, referring to Figures 17 to 22 as shown, the valve plate 230 further has: relief holes 234. A plurality of relief holes 234 are provided at different circumferential positions and are arranged around the guiding hole 231; the relief holes 234 axially penetrate through the valve plate 230. In the radial direction, the relief holes 234 are located between the guiding hole 231 and the flow-through hole 232.

[0229] The locking rod 252 has: guiding pieces 252a. A plurality of guiding pieces 252a are provided at different circumferential positions; the guiding pieces 252a extend axially and at least some of the guiding pieces 252a are inserted through the relief holes 234.

[0230] Through the cooperation of the relief holes 234 and the guiding pieces 252a, it is avoided that the valve plate 230 rubs against the locking rod 252 during movement, resulting in unbalanced force.

[0231] In some embodiments, referring to Figures 17 to 21 as shown, a plurality of guiding pieces 252a enclose an accommodation space 252c, and at least some of the positioning pins 251 are located in the accommodation space 252c. In this way, the axial space required for the positioning pins 251 can be further reduced, and the structure is compact.

[0232] In some embodiments, referring to Figures 17 to 21 as shown, a first contact surface 252b is formed on the guiding piece 252a, that is, the first elastic member 241 abuts between the guiding piece 252a and the valve core 220. A second contact surface 251b is formed on the positioning pin 251. More specifically, the positioning pin 251 has a supporting boss 251a, the second contact surface 251b is formed on the supporting boss 251a, and the second elastic member 242 abuts between the supporting boss 251a and the valve plate 230.

[0233] In some embodiments, referring to Figures 17 to 20 as shown, the valve core 220 further forms a positioning column 221 extending axially, the positioning column 221 protrudes into the core cavity, and at least some of the first elastic members 241 are sleeved on the positioning column 221. Through the arrangement of the positioning column 221, the positioning of the first elastic member 241 is realized, so that the first elastic member 241 is stably held between the guiding piece 252a and the valve core 220.

[0234] In some embodiments, referring to Figure 1 、 Figure 23 and Figure 24As shown, the flow regulating device 100 further includes: a driving module 340. The driving module 340 is configured to drive the valve core 120 to move towards the valve seat 110, so that the valve core 120 can overcome the first elastic force of the first elastic member 141 and abut against the valve plate 130 and the valve seat 110, thereby closing the second overflow passage 100b.

[0235] In some embodiments, referring to Figures 23 to 27 As shown, the shock absorber 10 further includes a driving module 340, and the driving module 340 includes: a coil bracket 361, a coil plastic cap 362, a coil metal cap 363, an iron core cover 370, a magnetic core 380, a magnetic isolation ring 341, and a pilot valve plug 346.

[0236] The driving module 340 includes a coil bracket 361, a coil plastic cap 362, and a coil metal cap 363. The coil plastic cap 362 is provided with a central hole 362a, and the coil bracket 361 is provided with a central column 361a corresponding to the central hole 362a. The outer side of the coil bracket 361 is wound with copper wire, and both ends of the coil 347 formed by the copper wire winding are respectively placed through two wire grooves of the coil bracket 361, passed through the side groove of the coil plastic cap 362, and then the central hole 362a of the coil plastic cap 362 is sleeved on the central column 361a of the plastic bracket, thereby fixing the copper wire in the wire groove.

[0237] The inner cavity of the coil bracket 361 is provided with an iron core cover 370, and the top end of the coil bracket 361 is provided with a U-shaped coil metal cap 363. The bottom surface of the coil metal cap 363 abuts against the top surface of the iron core cover 370. When the coil 347 is energized, the magnetic force lines are conducted through the metal cap, the iron core cover 370, and the magnetic valve body to form a strong magnetic force, driving the magnetic core 380 to attract the valve core 120.

[0238] The iron core cover 370 is configured as a rotating body structure, and the top of the iron core cover 370 is provided with a positioning boss 371. The positioning boss 371 positions the coil metal cap 363 and the coil bracket 361 through the concave-convex fit with the coil metal cap 363 and the coil bracket 361.

[0239] In some embodiments, referring to Figures 23 to 27As shown, the magnetic core 380 is slidably disposed inside the iron core cover 370, and the two are in clearance fit. The magnetic core 380 can move up and down along the axis of the iron core cover 370. Inside the iron core cover 370, a first chamber 370a and a second chamber 370b with different inner diameters are provided. The first chamber 370a and the second chamber 370b are disposed at different axial positions. The magnetic core 380 includes a first core body 381 and a second core body 382. The first core body 381 and the second core body 382 are disposed at different axial positions. The outer diameter of the second core body 382 is greater than that of the first core body 381. The first core body 381 is in sliding fit with the first chamber 370a, and the second core body 382 is in sliding fit with the second chamber 370b, thereby defining the sliding stroke of the iron core cover 370 in the iron core cover 370.

[0240] At least a part of the pilot valve plug 346 penetrates inside the magnetic core 380 and is fixedly disposed relative to the magnetic core 380. The bottom of the pilot valve plug 346 is a rotating body structure with an inclined surface or a curved surface, which is used to seal the overflow jack 124c of the valve core 120.

[0241] In some embodiments, referring to Figures 23 to 27 As shown, the top of the iron core cover 370 further has a guide groove 370c, and at least a part of the guide groove 370c is formed inside the positioning boss 371. The drive module 340 further includes a first guide sleeve 351, and at least a part of the first guide sleeve 351 is embedded inside the guide groove 370c. One end of the pilot valve plug 346 is in sliding fit with the first guide sleeve 351, so that the first guide sleeve 351 guides the up and down movement of the pilot valve plug 346. At least one place on the outer side wall of the first guide sleeve 351 is grooved as a circulation channel for up and down fluid or gas.

[0242] The first valve body 160 is further provided with a guide valve hole 165, and the guide valve hole 165 penetrates the first valve body 160 along the axis. The drive module 340 further includes a second guide sleeve 352, and at least a part of the second guide sleeve 352 is embedded inside the guide valve hole 165. The other end of the pilot valve plug 346 passes through the second guide sleeve 352 and is in sliding fit with the second guide sleeve 352, so that the first guide sleeve 351 and the second guide sleeve 352 cooperate to guide the up and down movement of the pilot valve plug 346, improving the stability of the movement of the pilot valve plug 346.

[0243] In some embodiments, referring to Figures 23 to 27As shown, the magnetic core 380 further has a first mounting groove 380a and a second mounting groove 380b. The first mounting groove 380a is provided at one end of the magnetic core 380, and the second mounting groove 380b is provided at the other end of the magnetic core 380. The drive module 340 further includes: a third elastic member 353 and a fourth elastic member 354. At least a part of the third elastic member 353 is disposed in the first mounting groove 380a, and one end of the third elastic member 353 abuts against the iron core cover 370 or the first guide sleeve 351 of the magnetic core 380. At least a part of the fourth elastic member 354 is disposed in the second mounting groove 380b, and one end of the fourth elastic member 354 abuts against the first valve body 160 or the first guide sleeve 351. By providing the third elastic member 353 and the fourth elastic member 354, static hovering of the magnetic core 380 in the axial direction can be achieved.

[0244] Exemplarily, the third elastic member 353 is a spring, and the third elastic member 353 is sleeved on the pilot valve plug 346. The fourth elastic member 354 is a spring, and the fourth elastic member 354 is sleeved on the pilot valve plug 346.

[0245] In some embodiments, referring to Figure 25 and Figure 26 As shown, the magnetic core 380 further has ventilation holes 380c and a ventilation channel 380d. The ventilation holes 380c penetrate the first core body 381 in the radial direction of the magnetic core 380, and a plurality of them are provided in the circumferential direction of the first core body 381. The ventilation channel 380d extends axially on the side wall of the second core body 382, and a plurality of them are spaced apart in the circumferential direction of the second core body 382. The ventilation channel 380d is communicated with the ventilation holes 380c. By providing the ventilation holes 380c and the ventilation channel 380d, the first mounting groove 380a, the chamber at the top of the magnetic core 380, the chamber at the bottom of the magnetic core 380, and the second mounting groove 380b are communicated, and the pressure difference between the chamber at the top of the magnetic core 380 and the chamber at the bottom during the movement of the magnetic core 380 is reduced, thereby reducing the resistance to the movement of the magnetic core 380.

[0246] In some embodiments, referring to Figure 23 As shown, the magnetic isolation ring 341 is configured as a rotating body structure, and a central hole 362a is provided in the middle of the magnetic isolation ring 341. The magnetic core 380 can slidably pass through the central hole 362a.

[0247] The magnetic isolation ring 341 is provided with limiting sunk grooves at its upper and lower parts, and the two limiting sunk grooves are coaxially arranged. A sealing boss is radially arranged on the outer side of the iron core cover 370. The bottom surface of the sealing boss axially abuts against the bottom wall of the upper limiting sunk groove of the magnetic isolation ring 341, and the outer side wall of the sealing boss is in interference fit with the inner side wall of the upper limiting sunk groove of the magnetic isolation ring 341, so as to seal the matching area between the iron core cover 370 and the magnetic isolation ring 341 and prevent liquid leakage. The cross-section of the lower limiting groove 341a is set to be conical, and a conical boss 166 is arranged at the top of the first valve body 160. The conical boss 166 cooperates with the lower limiting groove 341a of the magnetic isolation ring 341 to radially and accurately position the magnetic isolation ring 341.

[0248] Through the arrangement of the limiting sunk grooves, while meeting the sealing requirements, it can radially and accurately position the iron core cover 370 and the first valve body 160 connected above and below it.

[0249] A sealing assembly groove 341b is also arranged on the outer side wall of the magnetic isolation ring 341, and a matching sealing ring 342 is assembled in the sealing assembly groove 341b to seal the outer side wall of the magnetic isolation ring 341 and the inner side wall of the piston rod 331.

[0250] According to the second aspect of the present application, as shown in Figure 1 a shock absorber 10 is provided, and the shock absorber 10 includes the above-mentioned flow regulating device 100. The shock absorber 10 has all the beneficial effects of the above-mentioned flow regulating device 100, and the present application will not elaborate here.

[0251] In some embodiments, as shown in Figure 1 and Figure 2 , Figures 23 to 28 the shock absorber 10 further includes: a housing 301, a piston rod 331, a piston valve 332 and a bottom valve 333.

[0252] Specifically, the housing 301 includes an outer housing 310 and an inner housing 320. The inner wall of the outer housing 310 and the outer wall of the inner housing 320 form a part of the liquid storage cavity 300a, and a fluid and an inert gas under a certain pressure are stored in the liquid storage cavity 300a. The bottom valve 333 is fixedly arranged at the bottom of the inner housing 320, and another part of the liquid storage cavity 300a is also formed between the bottom valve 333 and the bottom wall of the outer housing 310.

[0253] The piston valve 332 and the flow regulating device 100 are respectively movably arranged inside the inner housing 320. A compression chamber (i.e., the above-mentioned second chamber 300b) is formed between the bottom valve 333 and the piston valve 332, and a restoration chamber (i.e., the above-mentioned first chamber 300c) is formed on the side of the piston valve 332 away from the bottom valve 333. The flow regulating device 100 is connected between the piston valve 332 and the piston rod 331, so that the piston rod 331, the flow regulating device 100 and the piston valve 332 are connected into a piston movement assembly, and then the states of the compression chamber and the restoration chamber are changed when the piston movement assembly moves.

[0254] The shock absorber 10 is installed above the wheel axle for shock absorption. When the body and the wheel have relative movement, the piston movement assembly moves up and down inside the inner housing 320. The fluid inside the shock absorber 10 repeatedly flows from the liquid storage chamber 300a and the restoration chamber into the compression chamber through different channels or flow paths, or flows out from the compression chamber through different channels or flow paths to the liquid storage chamber 300a and the restoration chamber, and converts the vibration energy into the heat energy of the fluid and gas and dissipates it to the atmosphere, so that the shock absorber 10 works efficiently in a lower temperature range.

[0255] The piston rod 331, as the main body connecting the flow regulating device 100, is configured as a rotating body structure, and an installation cavity 331a is arranged inside it. At least part of the drive module 340 is arranged in the installation cavity 331a. Part of the inner wall of the installation cavity 331a is provided with a second internal thread portion 331b, which is matched with the first external thread portion 161 of the first valve body 160 to achieve fixed connection.

[0256] The piston rod 331 is provided with a side through hole 331c, and the side through hole 331c penetrates the side wall of the piston rod 331 in the radial direction to communicate with the installation cavity 331a, so as to realize the air change between the inside and outside of the piston rod 331 during the movement of the piston rod 331.

[0257] The working process of the shock absorber 10 of the present application is described exemplarily:

[0258] When the vehicle 1 equipped with the shock absorber 10 of the present application is driving on a relatively flat road surface and the coil 347 in the drive module 340 is not powered on, the spool 120 and the valve plate 130 make the second overflow channel 100b in an always-open state under the combined action of each elastic member, which is equivalent to the flow regulating device 100 being an always-open valve.

[0259] When the piston rod 331 vibrates upward, the pressure in the restoration chamber (i.e., the first chamber 300c) increases. Referring to Figure 29 As shown, the fluid flows from the restoration chamber into the compression chamber (i.e., the second chamber 300b) through the second overflow channel 100b between the valve plate 130 and the spool 120, and at the same time the fluid in the oil storage chamber also flows into the compression chamber through the bottom valve 333. In this state, the fluid flow rate is large and the fluid damping is small, and the shock absorber 10 shows "softness".

[0260] When the piston rod 331 vibrates downward, the pressure in the restoring chamber (i.e., the first chamber 300c) decreases, and the pressure in the compression chamber (i.e., the second chamber 300b) increases. Referring to Figure 30 as shown, the fluid pushes the valve plate 130 from the compression chamber to abut against the valve core 120. At this time, the fluid flows from the second overflow channel 100b between the valve plate 130 and the valve seat 110 into the restoring chamber. At the same time, the fluid in the compression chamber flows into the oil storage chamber through the bottom valve 333. The gas in the liquid storage chamber 300a is compressed and buffered to absorb energy and reduce vibration. In this state, the fluid flow rate is large and the fluid damping is small.

[0261] When the coil 347 in the drive module 340 is not energized, when the piston rod 331 reciprocates up and down, the fluid reciprocates in the liquid storage chamber 300a, the compression chamber, and the restoring chamber with a large flow rate and small fluid damping, and the riding comfort is better.

[0262] When the vehicle 1 equipped with the shock absorber 10 of the present application travels on a road with potholes and unevenness, the coil 347 in the drive module 340 is energized, the magnetic core 380 is pushed downward by the magnetic force, the pilot valve plug 346 on the drive module 340 pushes the valve core 120, the valve core 120 abuts against the valve plate 130, and the valve plate 130 abuts against the valve seat 110, thus closing (or partially closing) the second overflow channel 100b between the valve seat 110 and the valve core 120.

[0263] When the piston rod 331 vibrates upward, the pressure in the restoring chamber (i.e., the first chamber 300c) increases, and the fluid flows from the restoring chamber and the oil storage chamber into the compression chamber (i.e., the second chamber 300b). In the first stage, referring to Figure 31 as shown, since the valve core 120 abuts against the valve plate 130 and the valve plate 130 abuts against the valve seat 110, the second overflow channel 100b is closed, and the fluid first flows from the flow-through opening 112 of the valve seat 110 (i.e., the first overflow channel 100a) from the restoring chamber into the compression chamber. At this time, the flow rate is small and the damping is large, showing "hardness"; in the second stage, referring to Figure 2 、 Figures 9 to 11 、 Figure 31As shown, the fluid flows through the third communication flow channel 164 of the first valve body 160 and into the first communication flow channel 124 of the valve core 120 through the second transition cavity 163a. When the fluid pressure increases at the second transition cavity 163a and the first communication flow channel 124, it overcomes the electromagnetic force and pushes open the pilot valve plug 346 on the drive module 340 and flows into the first transition cavity 123a, and then flows from the first transition cavity 123a into the core cavity 121a through the second communication flow channel 125 of the valve core 120, reducing the fluid damping; In the third stage, as shown in the figure, a large amount of fluid accumulates in the seat cavity 111, and the oil pressure increases at the seat cavity 111 and the core cavity 121a. When the pressure is greater than the electromagnetic force, the fluid pushes open the valve plate 130 and the valve core 120 to move axially to open the second overflow channel 100b, and the fluid flows from the recovery cavity into the seat cavity 111 through the second overflow channel 100b, further reducing the damping.

[0264] When the piston rod 331 vibrates downward, the pressure in the compression cavity increases. Refer to Figure 33 As shown, the fluid flows out of the compression cavity to the recovery cavity and the oil storage cavity. In the first stage, since the valve core 120 abuts against the valve plate 130 and the valve plate 130 abuts against the valve seat 110, the second overflow channel 100b is closed, and the fluid first flows out of the flow-through opening 112 of the valve seat 110 (i.e., the first overflow channel 100a) to the recovery cavity. At this time, the flow rate is small and the damping is large, showing "hardness"; In the second stage, refer to Figure 34 As shown, a large amount of fluid accumulates in the seat cavity 111 and the core cavity 121a, and the oil pressure increases at the seat cavity 111 and the core cavity 121a. When the pressure is greater than the electromagnetic force, it pushes open the valve plate 130 and the valve core 120 to move axially to open the second overflow channel 100b, and the fluid flows out through the second overflow channel 100b between the valve seat 110 and the valve plate 130, reducing the damping.

[0265] When the coil 347 in the drive module 340 is energized, when the piston rod 331 reciprocates up and down, the fluid reciprocates in the liquid storage cavity 300a, the compression cavity, and the recovery cavity, and the flow rate changes, and the fluid damping changes, resulting in better riding comfort.

[0266] According to the third aspect of the present application, refer to Figure 35 As shown, a vehicle 1 is provided. The vehicle 1 includes the above-mentioned shock absorber 10, and the vehicle 1 has all the beneficial effects of the above-mentioned shock absorber 10, which will not be elaborated herein.

[0267] The vehicle 1 can be a fuel vehicle, a plug-in hybrid vehicle, or a new energy vehicle, etc., and the present application does not make specific limitations on this.

[0268] In the description of the present application, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more features. In the description of the present application, "a plurality of" means two or more, unless otherwise specifically defined.

[0269] In the above embodiments, the descriptions of the respective embodiments have their own emphases. For parts not detailed in a certain embodiment, reference may be made to the relevant descriptions of other embodiments.

[0270] The embodiments, implementation manners and related technical features of the present application can be combined and replaced with each other without conflict.

[0271] The above are only the preferred embodiments of the present application and do not impose any formal limitations on the present application. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present application without departing from the content of the technical solution of the present application still fall within the scope of the technical solution of the present application.

Claims

1. A flow regulating device, characterized in that: The flow regulating device is disposed in a housing to at least separate the internal space of the housing into a first cavity and a second cavity, the flow regulating device is formed with a first channel connecting the first cavity and the second cavity, and the flow regulating device comprises: Valve seat; a valve core, movable relative to the valve seat to adjust the communication damping of the first channel; A valve plate, movably arranged between the valve seat and the valve core; a first elastic member, used for applying a first elastic force to the valve core, so that the valve core has a tendency to move away from the valve seat; a second elastic member, used for applying a second elastic force to the valve plate, so that the valve plate has a tendency to abut against the valve seat; The driving module is used to drive the valve core to move toward the valve seat.

2. The flow regulating device according to claim 1, characterized in that: The valve seat has: a seat cavity, communicating with the second cavity; Wherein, the seat cavity constitutes at least a part of the first channel; the valve core moves between a first position and a second position relative to the valve seat; When the valve core is in the first position, the valve sheet is clamped between the valve core and the valve seat; When the valve core is at the second position, the valve sheet is separated from the valve core or the valve seat, and a second overflow channel communicating with the seat cavity and the first cavity is formed between the valve core and the valve seat.

3. The flow regulating device according to claim 2, characterized in that: The second overflow channel is formed between the valve core and the valve plate or between the valve seat and the valve plate; When the valve plate is separated from the valve core, the second overflow channel is at least formed by the distance between the valve core and the valve plate; When the valve plate is separated from the valve seat, the second overflow channel is at least formed by the distance between the valve core and the valve seat.

4. The flow regulating device according to claim 2, characterized in that: The valve plate has: A flow hole, axially penetrating the valve plate; When the valve core is separated from the valve plate, the flow hole constitutes a part of the first channel, and the flow hole is communicated between the first chamber and the seat chamber.

5. The flow regulating device according to claim 2, characterized in that: When the valve core is at the first position, a first overflow channel communicating the seat cavity and the first cavity is formed at least by the valve seat.

6. The flow regulating device according to claim 5, characterized in that: The valve seat has: A flow opening communicating between the seat cavity and the first cavity; Wherein, the first overflow channel is at least constituted by the overflow opening.

7. The flow regulating device according to claim 6, characterized in that: The flow opening is formed at one end of the valve seat close to the valve plate.

8. The flow regulating device according to claim 4, characterized in that: The valve core is constructed to have a stop wall that can contact the end surface of the valve plate; the valve core is formed with a core cavity surrounded by the stop wall, and the flow hole is connected between the core cavity and the seat cavity.

9. The flow regulating device according to claim 8, characterized in that: The force-bearing area of ​​the valve plate in the core cavity is smaller than the force-bearing area of ​​the valve plate in the seat cavity.

10. The flow regulating device according to claim 9, characterized in that: At least a portion of the flow-stopping wall protrudes in the axial direction to form a tip portion.

11. The flow regulating device according to claim 10, characterized in that: The valve seat also has: A flow groove is formed at one end of the valve seat close to the valve core; The flow groove constitutes at least a part of the seat cavity; the axial projection contour of one end of the tip portion close to the valve plate is inside the axial projection contour of the side wall of the flow groove.

12. The flow regulating device according to claim 8, characterized in that: The first elastic member and the second elastic member are respectively located in the core cavity.

13. The flow regulating device according to claim 8, characterized in that: The valve core has: A first communication channel, used for communicating with the first cavity; A second communication channel, used for communicating with the core cavity; A first transition chamber, disposed between the first communicating flow channel and the second communicating flow channel; The driving module comprises: The pilot valve plug is at least used to control the communication or blocking between the first communicating flow channel and the first transition chamber.

14. The flow regulating device according to claim 13, characterized in that: The first communicating flow channel comprises: A first overflow hole extending along the axial direction of the valve core and communicating with the first chamber; a second overflow hole extending in a radial direction of the valve core and communicating with the first overflow hole; An overflow socket extending along the axial direction of the valve core and communicating between the second overflow hole and the first transition chamber; Wherein, the overflow socket cooperates with the pilot valve plug to control the communication or blockage between the overflow socket and the first transition chamber.

15. The flow regulating device according to claim 13, characterized in that: The flow regulating device also includes: A first valve body having a third communication flow channel for communicating with the first chamber; A second valve body having a fourth communication flow channel for connecting the first cavity with the seat cavity and / or the core cavity; Wherein, at least a part of the valve core is slidably disposed in the first valve body, a second transition cavity is formed between the valve core and the first valve body, and the second transition cavity is respectively communicated with the first communication flow channel and the third communication flow channel; The first valve body is fixedly connected to the second valve body, and the valve seat is fixedly connected to the second valve body.

16. The flow regulating device according to any one of claims 1 to 15, characterized in that: The valve seat has or is connected with: A conductive member, at least partially located between the valve seat and the valve core; Wherein, the conductive member is respectively combined with the first elastic member and / or the second elastic member; and the conductive member is fixed relative to the valve seat.

17. The flow regulating device according to claim 16, characterized in that: The conductive member comprises: a first contact surface, in contact with the first elastic member; a second contact surface, in contact with the second elastic member; Wherein, the first contact surface and the second contact surface are arranged opposite to each other so as to face the direction where the valve core and the valve seat are located respectively.

18. The flow regulating device according to claim 17, characterized in that: At least one of the first contact surface and the second contact surface is configured as an annular step surface.

19. The flow regulating device according to claim 17, characterized in that: At least one of the first elastic member and the second elastic member is a coil spring; One end of the first elastic member contacts the first contact surface, and the other end of the first elastic member contacts the valve core; One end of the second elastic member contacts the second contact surface, and the other end of the second elastic member contacts the valve plate.

20. The flow regulating device according to claim 17, characterized in that: The conductive member has: A convex shoulder, located between the valve core and the valve plate; Wherein, the first contact surface and the second contact surface are respectively formed on two opposite sides of the boss in the axial direction.

21. The flow regulating device according to claim 16, characterized in that: The valve plate has: A guide hole, wherein at least part of the conductive member is passed through the guide hole to form a sliding connection; Wherein, the guide hole penetrates the valve plate along the axial direction.

22. A shock absorber, characterized in that: include: case; The flow regulating device according to any one of claims 1 to 21, at least used to separate the internal space of the housing into a first chamber and a second chamber; a piston valve movably disposed in the housing to change the states of the first chamber and the second chamber when the piston valve moves; Wherein, the flow regulating device is connected to the piston valve to move synchronously with the piston valve.

23. The shock absorber according to claim 22, characterized in that The vibration absorber further comprises: a piston rod, at least partly movably disposed in the housing; Wherein, the flow regulating device is connected between the piston rod and the piston valve; at least part of the driving module is arranged inside the piston rod.

24. A vehicle, characterized in that: A vibration absorber comprising any one of claims 22 to 23.

Images