Double-electromagnetic-valve adjustable shock absorber and motor vehicle

Abstract

The invention discloses a double-electromagnetic-valve adjustable shock absorber which comprises a damping pipe, a first electromagnetic valve and a second electromagnetic valve. The piston rod is arranged in the damping tube and telescopically moves in the axial direction; the working piston is arranged on the piston rod and divides the interior of the damping tube into a first working cavity and a second working cavity; the storage cavity is connected with the second working cavity; one side of the double-valve mounting base is connected with the end, deviating from the extending direction of the piston rod, of the damping pipe, and a first electromagnetic valve and a second electromagnetic valve are arranged on the double-valve mounting base; wherein the first electromagnetic valve is configured to adjust the damping force of the damping liquid from the first working cavity to the second working cavity when the piston rod extends out, and the second electromagnetic valve is configured to adjust the damping force of the damping liquid from the second working cavity to the storage cavity when the piston rod retracts. According to the double-electromagnetic-valve adjustable shock absorber, independent decoupling adjustment of compression and recovery can be achieved, the adjustment difficulty is greatly reduced, and meanwhile the part machining and assembling difficulty can be reduced.

Description

Technical Field

[0001] The invention relates to the technical field of shock absorbers, and in particular to a double-solenoid valve adjustable shock absorber and a motor vehicle. Background Art

[0002] Generally speaking, a shock absorber is a device or part used in vehicles (such as cars and trains) to absorb and cushion the vibration or impact caused by uneven road surfaces during the driving process of the vehicle. The shock absorber is generally composed of a piston rod for compression or recovery and a valve for damping.

[0003] Early shock absorbers only had one adjustment curve and could only adapt to a single road condition. With the continuous development of technology, shock absorbers with a single solenoid valve have emerged, which can meet the needs of multiple road conditions to a certain extent. Since the compression recovery damping adjustment response time of a single solenoid valve is relatively long, a dual solenoid valve shock absorber came into being. This type of shock absorber can not only adapt to multiple road conditions, but also realize independent adjustment of compression recovery, while also reducing the adjustment response time of compression recovery damping.

[0004] Patent CN107850165B discloses a vibration damper for motor vehicles. Although it realizes the decoupling adjustment of recovery and compression in principle, the long axial dimension of the outer tube is not conducive to the assembly of parts outside the outer tube of the damper, and three isolation devices need to be installed on the inner tube of the damper, namely, the isolation sealing device, the bottom valve sealing device, and the air chamber piston, all of which are installed in one tube, which makes the assembly difficult. At the same time, there is a high adjustment difficulty in damping adjustment. For example, the lower limit of compression damping is difficult to reduce, the compression direction solenoid valve adjustment bandwidth is small, and the recovery stroke is prone to empty travel.

[0005] Another example is the variable damping force buffer disclosed in patent KR102338556B1. Although this solution can also achieve independent adjustment of compression recovery damping, it is difficult to process and assemble parts, which easily leads to high product defect rate and low productivity. In addition, the two solenoid valves in this solution are arranged vertically and side by side on the base shell, which takes up a huge radial space and is not conducive to the layout and design of the vehicle chassis. Summary of the invention

[0006] The purpose of the present invention is to provide a dual solenoid valve adjustable shock absorber and a motor vehicle in view of the above-mentioned deficiencies of the shock absorber using dual valve control technology in the prior art, which can realize independent decoupling adjustment of compression and recovery, greatly reducing the difficulty of adjustment, and at the same time can reduce the difficulty of parts processing and assembly.

[0007] The present invention is achieved through the following technical solutions:

[0008] In a first aspect, the present invention provides a dual solenoid valve adjustable shock absorber, comprising:

[0009] A damping tube, the interior of which is filled with a damping liquid;

[0010] A piston rod is disposed in the damping tube and is capable of telescopic movement in the axial direction;

[0011] A working piston is disposed on the piston rod and divides the interior of the damping tube into a first working chamber and a second working chamber;

[0012] A storage chamber connected to the second working chamber;

[0013] A double-valve mounting base, one side of which is connected to an end of the damping tube away from the extending direction of the piston rod, and a first solenoid valve and a second solenoid valve are arranged on the double-valve mounting base;

[0014] Wherein, the first solenoid valve is configured to adjust the damping force of the damping fluid from the first working chamber to the second working chamber when the piston rod extends, and the second solenoid valve is configured to adjust the damping force of the damping fluid from the second working chamber to the storage chamber when the piston rod retracts.

[0015] In some embodiments of the present invention, the inlet of the first solenoid valve is connected to the first working chamber, and the outlet of the first solenoid valve is connected to the second working chamber; the inlet of the second solenoid valve is connected to the second working chamber, and the outlet of the second solenoid valve is connected to the storage chamber.

[0016] In some embodiments of the present invention, the damping tube comprises:

[0017] A working cylinder, an intermediate cylinder and an outer tube are sequentially sleeved from the inside to the outside, wherein radial clearances are provided between the working cylinder, the intermediate cylinder and the outer tube, and a communicating hole is provided in the first working chamber of the working cylinder;

[0018] The working piston is arranged in the working cylinder. The side of the working piston facing away from the dual-valve mounting base and the radial gap between the working cylinder and the intermediate cylinder together form the first working chamber. The side of the working piston facing the dual-valve mounting base forms the second working chamber. The radial gap between the intermediate cylinder and the outer tube forms the storage chamber.

[0019] In some embodiments of the present invention, the dual-valve mounting base is provided with a first mounting hole and a second mounting hole for accommodating the first solenoid valve and the second solenoid valve, and the first mounting hole and the second mounting hole are separated from each other.

[0020] In some embodiments of the present invention, the inlet end of the first solenoid valve forms a chamber A, and the outlet end of the first solenoid valve forms a first solenoid valve discharge chamber; the inlet end of the second solenoid valve forms a chamber B, and the outlet end of the second solenoid valve forms a second solenoid valve discharge chamber.

[0021] In some embodiments of the present invention, the dual-valve mounting base is provided with a chamber A inlet, a first solenoid valve discharge chamber outlet, a chamber B inlet and a second solenoid valve discharge chamber outlet, the chamber A inlet is connected to the first working chamber and chamber A, the first solenoid valve discharge chamber outlet is connected to the first solenoid valve discharge chamber and the second working chamber, the chamber B inlet is connected to the second working chamber and chamber B, and the second solenoid valve discharge chamber outlet is connected to the second solenoid valve discharge chamber and the storage chamber.

[0022] In some embodiments of the present invention, a liquid storage channel is provided on the dual-valve mounting base, the liquid storage channel inlet is communicated with the second working chamber, and the liquid storage channel outlet is communicated with the storage chamber.

[0023] In some embodiments of the present invention, a piston valve group is provided on the working piston, and the piston valve group includes a restoring passive valve and a compression second passive valve. The restoring passive valve is used to open in the restoring stroke to allow the damping liquid in the first working chamber to flow to the second working chamber, and the compression second passive valve is used to open in the compression stroke to allow the damping liquid in the second working chamber to flow to the first working chamber.

[0024] In some embodiments of the present invention, a bottom valve assembly is provided at one end of the damping tube connected to the dual-valve mounting base, and the bottom valve assembly includes a bottom valve seat, a first compression passive valve and a restoration compensation valve. The first compression passive valve is used to open during a compression stroke to allow the damping liquid in the second working chamber to flow to the storage chamber, and the restoration compensation valve is used to open during a restoration stroke to allow the damping liquid in the storage chamber to flow to the second working chamber.

[0025] In some embodiments of the present invention, the bottom valve seat is embedded in the double valve mounting base, and a second working chamber annular groove is provided on one end of the bottom valve seat connected to the double valve mounting base, and the second working chamber annular groove is connected to the outlet of the first solenoid valve discharge chamber and the inlet of chamber B, and a second working chamber leakage hole is provided at the other end of the bottom valve seat, and the second working chamber leakage hole is connected to the second working chamber annular groove and the second working chamber.

[0026] In some embodiments of the present invention, the damping tube comprises:

[0027] A working cylinder and an outer tube, wherein the outer tube is sleeved on the outside of the working cylinder and has a radial gap with the working cylinder, and a communicating hole is opened in the first working chamber of the working cylinder;

[0028] The working piston is disposed in the working cylinder. The side of the working piston facing away from the dual-valve mounting base and the radial gap together form the first working chamber. The side of the working piston facing the dual-valve mounting base forms the second working chamber.

[0029] In some embodiments of the present invention, a connecting cylinder is provided on the dual-valve mounting base, and the connecting cylinder is located on the side of the dual-valve mounting base opposite to the damping tube. A floating piston is provided in the connecting cylinder, and the area between one side of the floating piston and the dual-valve mounting base forms the storage cavity, and the other side forms an air chamber.

[0030] In a second aspect, the present invention provides another dual solenoid valve adjustable shock absorber, comprising:

[0031] A damping tube, the interior of which is filled with a damping liquid;

[0032] A piston rod is disposed in the damping tube and is capable of telescopic movement in the axial direction;

[0033] A working piston is disposed on the piston rod and divides the interior of the damping tube into a first working chamber and a second working chamber;

[0034] A storage chamber connected to the second working chamber;

[0035] A double-valve mounting base, one side of which is connected to an end of the damping tube away from the extending direction of the piston rod, and a first solenoid valve and a second solenoid valve are arranged on the double-valve mounting base;

[0036] Wherein, the first solenoid valve is configured to adjust the damping force of the damping fluid from the first working chamber to the second working chamber when the piston rod is extended, and the second solenoid valve is configured to adjust the damping force of the damping fluid from the second working chamber to the storage chamber when the piston rod is retracted;

[0037] A first one-way valve and a second one-way valve are arranged on the double-valve mounting base. The first one-way valve is connected in series to the inlet end of the first solenoid valve, and the second one-way valve is connected in series to the inlet end of the second solenoid valve.

[0038] In a third aspect, the present invention provides a motor vehicle comprising the dual solenoid valve adjustable shock absorber described in the first aspect or the second aspect.

[0039] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0040] 1. The present invention arranges one solenoid valve in the compression path and another solenoid valve in the recovery path. In this way, when one of the paths is controlled, the adjustment of the solenoid valve on the path will not affect the damping force value of the other path, thereby realizing independent decoupling adjustment of the compression stroke and the recovery stroke. Since the generation of damping is directly related to the pressure building process, the damping can be established more quickly, and the response time of the closed-loop control of the system is improved, thereby breaking through the limitation of the single valve response time in the prior art.

[0041] 2. The present invention directly connects the outlet of the solenoid valve on the compression path to the storage chamber, so that when adjusting the lower limit of the compression damping, the damping under the low current and high speed state can be easily reduced, thereby greatly reducing the difficulty of adjustment;

[0042] 3. Compared with the existing technical solutions, the present invention can reduce the radial space occupied by the shock absorber, reduce the use of sealing devices, and at the same time reduce the difficulty of parts processing and assembly, thereby improving the assembly yield and efficiency of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and should not be regarded as limiting the scope. For those of ordinary skill in the art, other relevant drawings can be obtained based on these drawings without creative work. In the drawings:

[0044] Figure 1 It is a stereoscopic diagram of the dual solenoid valve adjustable shock absorber in the present invention;

[0045] Figure 2 It is a longitudinal sectional view of the dual solenoid valve adjustable shock absorber of the present invention;

[0046] Figure 3 For the present invention Figure 2 AA section view in;

[0047] Figure 4 For the present invention Figure 3 A partial schematic diagram of the inlet end of the first solenoid valve;

[0048] Figure 5 For the present invention Figure 3 A partial schematic diagram of the inlet end of the second solenoid valve;

[0049] Figure 6 For the present invention Figure 1 The three-dimensional diagram of the dual valve mounting base assembly;

[0050] Figure 7 For the present invention Figure 6 Explosion diagram of

[0051] Figure 8 For the present invention Figure 6 A plan view of a dual valve mounting base;

[0052] Fig. 9 For the present invention Figure 8 BB section view in;

[0053] Fig.10 For the present invention Figure 2 Schematic diagram of the position of the piston valve group and the bottom valve assembly;

[0054] Fig.11 It is a schematic diagram of another dual solenoid valve adjustable shock absorber in the present invention;

[0055] Fig.12 It is a working principle diagram of the dual solenoid valve adjustable shock absorber in the present invention;

[0056] Fig.13 This is a schematic diagram of another dual solenoid valve adjustable shock absorber in the present invention.

[0057] Marks and corresponding parts names in the attached drawings:

[0058] 11-working cylinder, 111-connecting hole, 12-middle cylinder, 13-outer tube, 14-first working chamber, 15-second working chamber; 2-piston rod, 21-working piston, 211-recovery passive valve, 212-compression second passive valve; 3-dual valve mounting base, 31-chamber A, 311-chamber A inlet, 32-first solenoid valve discharge chamber, 321-first solenoid valve discharge chamber outlet, 33-chamber B, 331-chamber B inlet, 34-second solenoid valve discharge chamber, 341-second solenoid valve discharge chamber outlet, 35-liquid storage channel, 351-liquid storage channel Inlet, 352-liquid storage channel outlet, 36-first mounting hole, 37-second mounting hole; 41-first solenoid valve, 411-first solenoid valve inlet, 412-first solenoid valve outlet, 42-second solenoid valve, 421-second solenoid valve inlet, 422-second solenoid valve outlet, 51-first one-way valve, 52-second one-way valve, 53-sealing ring; 61-connecting tube, 62-floating piston, 71-bottom valve seat, 711-second working chamber annular groove, 712-second working chamber leakage hole, 72-compression first passive valve, 73-recovery compensation valve, 8-storage chamber. DETAILED DESCRIPTION

[0059] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with embodiments and drawings. The exemplary embodiments of the present invention and their description are only used to explain the present invention and are not intended to limit the present invention.

[0060] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0061] In the description of the embodiments of the present application, technical terms such as "first" and "second" are only used to distinguish different objects and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features.

[0062] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0063] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists, A and B exist at the same time, and B exists. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0064] In the embodiments of the present application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width and other dimensions of various components in the embodiments of the present application shown in the drawings, as well as the overall thickness, length, width and other dimensions of the integrated device are only exemplary descriptions and should not constitute any limitation to the present application.

[0065] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces), unless otherwise clearly and specifically defined.

[0066] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0067] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0068] Example 1

[0069] Please refer to Figures 1 to 10 , Fig.12 , a dual solenoid valve adjustable shock absorber provided in an embodiment of the present application includes:

[0070] A damping tube, the interior of which is filled with a damping liquid;

[0071] A piston rod 2, which is arranged in the damping tube and moves telescopically in the axial direction;

[0072] A working piston 21 is disposed on the piston rod 2 and divides the interior of the damping tube into a first working chamber 14 and a second working chamber 15;

[0073] The storage chamber 8 is connected to the second working chamber 15;

[0074] A double-valve mounting base 3, one side of which is connected to an end of the damping tube away from the extending direction of the piston rod 2, and a first solenoid valve 41 and a second solenoid valve 42 are arranged on the double-valve mounting base 3;

[0075] Among them, the first solenoid valve 41 is configured to adjust the damping force of the damping fluid from the first working chamber 14 to the second working chamber 15 when the piston rod 2 is extended, and the second solenoid valve 42 is configured to adjust the damping force of the damping fluid from the second working chamber 15 to the storage chamber 8 when the piston rod 2 is retracted.

[0076] According to some embodiments of the present application, the inlet of the first solenoid valve 41 is connected to the first working chamber 14, and the outlet of the first solenoid valve 41 is connected to the second working chamber 15; the inlet of the second solenoid valve 42 is connected to the second working chamber 15, and the outlet of the second solenoid valve 42 is connected to the storage chamber 8.

[0077] The present application arranges a solenoid valve on the compression path and the recovery path respectively, so that when one of the paths is controlled, the adjustment of the solenoid valve on the path will not affect the damping force value of the other flow path, thereby realizing independent decoupling adjustment of the compression stroke and the recovery stroke.

[0078] Since the outlet of the second solenoid valve 42 on the compression path is directly connected to the storage chamber 8, when adjusting the lower limit of the compression damping, the damping under the low current and high speed state can be easily reduced, which greatly reduces the difficulty of adjustment.

[0079] According to some embodiments of the present application, the damping tube includes:

[0080] The working cylinder 11, the middle cylinder 12 and the outer tube 13 are sequentially sleeved from the inside to the outside, and radial gaps are formed between the working cylinder 11, the middle cylinder 12 and the outer tube 13. A connecting hole 111 is formed in the first working chamber 14 of the working cylinder 11. The connecting hole 111 is located on the wall of the working cylinder 11 near the extended end of the piston rod 2 to connect the inner and outer sides of the working cylinder 11.

[0081] The working piston 21 is cooperatively arranged in the working cylinder 11, and the side of the working piston 21 facing away from the dual-valve mounting base 3 and the radial gap between the working cylinder 11 and the intermediate cylinder 12 together form the first working chamber 14, the side of the working piston 21 facing the dual-valve mounting base 3 forms the second working chamber 15, and the radial gap between the intermediate cylinder 12 and the outer tube 13 forms the storage chamber 8.

[0082] In the present application, by arranging the middle cylinder 12 in the shock absorber, the difficulty of manufacturing and assembling the shock absorber is greatly reduced compared with the double-valve controlled shock absorber in the prior art, which is conducive to improving the product yield and efficiency.

[0083] According to some embodiments of the present application, the dual-valve mounting base 3 is provided with a first mounting hole 36 and a second mounting hole 37 for accommodating the first solenoid valve 41 and the second solenoid valve 42 , and the first mounting hole 36 and the second mounting hole 37 are separated from each other.

[0084] In some embodiments of the present invention, the first solenoid valve 41 is installed in the first installation hole 36, and is formed with a chamber A31 and a first solenoid valve discharge chamber 32, wherein the chamber A31 is located at the inlet end of the first solenoid valve 41, and the first solenoid valve discharge chamber 32 is located at the outlet end of the first solenoid valve 41;

[0085] The second solenoid valve 42 is installed in the second installation hole 37 and forms a chamber B33 and a second solenoid valve discharge chamber 34 . The chamber B33 is located at the inlet end of the second solenoid valve 42 , and the second solenoid valve discharge chamber 34 is located at the outlet end of the second solenoid valve 42 .

[0086] The axes of the first solenoid valve 41 and the second solenoid valve 42 are parallel and horizontally arranged, and the axes of the first solenoid valve 41 and the second solenoid valve 42 are perpendicular to the axis of the shock absorber. The first solenoid valve 41 and the second solenoid valve 42 are inserted into the first mounting hole 36 and the second mounting hole 37 on the dual-valve mounting base 3, which can reduce the radial space occupied by the shock absorber, and the overall structural layout of the shock absorber is more compact, which is conducive to the installation and arrangement of the shock absorber on the whole vehicle.

[0087] Specifically, the bottom of the first mounting hole 36 and the second mounting hole 37 has a groove. After the first solenoid valve 41 and the second solenoid valve 42 are inserted into the first mounting hole 36 and the second mounting hole 37, the inlet end face of the first solenoid valve 41 forms a planar seal with the bottom wall of the first mounting hole 36 through the sealing ring 53, the groove area forms a chamber A31, and the bottom of the first mounting hole 36 forms a first solenoid valve discharge chamber 32. The inlet end face of the second solenoid valve 42 forms a planar seal with the bottom wall of the second mounting hole 37 through the sealing ring 53, the groove area forms a chamber B33, and the bottom of the second mounting hole 37 forms a second solenoid valve discharge chamber 34.

[0088] According to some embodiments of the present application, a chamber A inlet 311, a first solenoid valve discharge chamber outlet 321, a chamber B inlet 331 and a second solenoid valve discharge chamber outlet 341 are provided on the side of the dual-valve mounting base 3 facing the piston rod 2, the chamber A inlet 311 connects the first working chamber 14 and chamber A31, the first solenoid valve discharge chamber outlet 321 connects the first solenoid valve discharge chamber 32 and the second working chamber 15, the chamber B inlet 331 connects the second working chamber 15 and chamber B33, and the second solenoid valve discharge chamber outlet 341 connects the second solenoid valve discharge chamber 34 and the storage chamber 8.

[0089] According to some embodiments of the present application, a liquid storage channel 35 is also provided on the dual-valve mounting base 3, the liquid storage channel inlet 351 is communicated with the second working chamber 15, the liquid storage channel outlet 352 is communicated with the storage chamber 8, and the liquid storage channel inlet 351 and the liquid storage channel outlet 352 are both located on the side facing the piston rod 2.

[0090] According to some embodiments of the present application, a piston valve group is provided on the working piston 21, and the piston valve group includes a return passive valve 211 and a compression second passive valve 212, the return passive valve 211 is used to open in the return stroke to allow the damping liquid in the first working chamber 14 to flow to the second working chamber 15, and the compression second passive valve 212 is used to open in the compression stroke to allow the damping liquid in the second working chamber 15 to flow to the first working chamber 14. It should be noted that the structural principles of the return passive valve 211 and the compression second passive valve 212 are conventional technologies and will not be repeated here.

[0091] According to some embodiments of the present application, a bottom valve assembly is provided at one end of the working cylinder 11 connected to the dual-valve mounting base 3, and the bottom valve assembly includes a bottom valve seat 71, a first compression passive valve 72, and a recovery compensation valve 73. The first compression passive valve 72 is used to open in the compression stroke to allow the damping liquid in the second working chamber 15 to flow to the storage chamber 8 through the storage channel 35, and the recovery compensation valve 73 is used to open in the recovery stroke to allow the damping liquid in the storage chamber 8 to flow to the second working chamber 15 through the storage channel 35. It should be noted that the structural principles of the first compression passive valve 72 and the recovery compensation valve 73 are conventional technologies and will not be repeated here.

[0092] According to some embodiments of the present application, the bottom valve seat 71 is embedded in the double valve mounting base 3, and a second working chamber annular groove 711 is provided on one end of the bottom valve seat 71 connected to the double valve mounting base 3, and the second working chamber annular groove 711 is connected to the first solenoid valve discharge chamber outlet 321 and the chamber B inlet 331, and a second working chamber leakage hole 712 is provided at the other end of the bottom valve seat 71, and the second working chamber leakage hole 712 is connected to the second working chamber annular groove 711 and the second working chamber 15.

[0093] According to some embodiments of the present application, the dual-valve mounting base 3 is provided with a first one-way valve 51 and a second one-way valve 52, wherein the first one-way valve 51 is connected in series to the inlet end of the first solenoid valve 41, and the second one-way valve 52 is connected in series to the inlet end of the second solenoid valve 42. Fig.13 As shown, the inlet of the first one-way valve 51 is connected to the chamber A31, so that the damping liquid in the chamber A31 flows unidirectionally toward the inlet of the first solenoid valve 41. The inlet of the second one-way valve 52 is connected to the chamber B33, so that the damping liquid in the chamber B33 flows unidirectionally toward the inlet of the second solenoid valve 42.

[0094] In the above scheme, a one-way valve assembly is placed in series at the front end of each of the two solenoid valves. Because the solenoid valve is not completely closed when it is powered off or not working, the damping medium inside the shock absorber will flow back to a certain extent. Although it does not affect the function of the shock absorber, it will have a certain impact on the performance. The arrangement of the one-way valve assembly can reduce or avoid the backflow of the damping liquid in the recovery stroke or compression stroke, and improve the stability of the normal use of the solenoid valve.

[0095] It should be noted that the first one-way valve 51 and the second one-way valve 52 may adopt any structure in the prior art as long as the one-way flow of the damping liquid can be achieved, and the specific structure is not limited here.

[0096] In this embodiment, the working piston 21 divides the interior of the working cylinder 11 into a first working chamber 14 and a second working chamber 15, and at the same time, the second working chamber leakage hole 712, the second working chamber annular groove 711, the chamber B inlet 331, and the chamber B33 are connected to the second working chamber 15 (line 1); the chamber A inlet 311 and the chamber A31 are connected to the first working chamber 14 (line 2); the second solenoid valve discharge chamber 34 and the second solenoid valve discharge chamber outlet 341 are connected to the storage chamber 8 (line 3); the first solenoid valve discharge chamber 32, the first solenoid valve discharge chamber outlet 321, the second working chamber annular groove 711, and the second working chamber leakage hole 712 are connected to the second working chamber 15 (line 4); the liquid storage channel inlet 351, the liquid storage channel 35, and the liquid storage channel outlet 352 are connected to the storage chamber 8 (line 5).

[0097] In the present embodiment, the oil flow path during the restoration process is as follows: the first oil path flows from the first working chamber 14 through line 2, the first solenoid valve inlet 411 (adjusted by the solenoid valve), the first solenoid valve outlet 412, line 4, and the second working chamber 15; the second oil path flows from the first working chamber 14 through the restoration passive valve 211 back to the second working chamber 15; the third oil path flows from the storage chamber 8 through the liquid storage channel 35 and the restoration compensation valve 73 into the second working chamber 15 to compensate for the volume change of the piston rod 2 when it is pulled out.

[0098] In this embodiment, the oil flow path during the compression process is: the first oil path is from the second working chamber 15 through the compression of the first passive valve 72, line 5, and the storage chamber 8; the second oil path is from the second working chamber 15 through line 1, the second solenoid valve inlet 421 (after solenoid valve adjustment), the second solenoid valve outlet 422, line 3, and returns to the storage chamber 8; the third oil path is from the second working chamber 15 through the compression of the second passive valve 212 and returns to the first working chamber 14.

[0099] The above workflow requires the construction of a flow path on the dual-valve mounting base 3, wherein the setting and arrangement of the holes on the dual-valve mounting base 3 are extremely important. The chamber A inlet 311 and the first solenoid valve discharge chamber outlet 321 are used to couple the oil to act on the first solenoid valve 41, the chamber B inlet 331 and the second solenoid valve discharge chamber outlet 341 are used to couple the oil to act on the second solenoid valve 42, and the liquid storage channel inlet 351 and the liquid storage channel outlet 352 are used to couple the oil volume change generated by the piston rod 2 entering the working cylinder 11 to the storage chamber 8, so that the shock absorber can work normally. At the same time, the dual-valve mounting base 3 also has a first mounting hole 36 and a second mounting hole 37 on the side, and the first solenoid valve 41 and the second solenoid valve 42 are coaxially installed in the corresponding mounting holes, and serve the recovery and compression strokes in pairs.

[0100] Compared with the dual-valve shock absorber in the prior art, the shock absorber in the present application has at least the following advantages: a more compact structural layout, occupying less radial space; reducing the difficulty of adjustment; the arrangement of the intermediate cylinder reduces the difficulty of manufacturing and assembly; the two solenoid valves do not need to be aligned and can be directly assembled, effectively reducing the defective rate and improving productivity; compression and recovery use parallel dual control channels, and the two channels can be independently decoupled and adjusted. Control.

[0101] Example 2

[0102] Please refer to Fig.11 , another feasible manner of the embodiment of the present application, the damping tube in this embodiment includes:

[0103] A working cylinder 11 and an outer tube 13, wherein the outer tube 13 is sleeved on the outside of the working cylinder 11 and has a radial gap with the working cylinder 11, and a communicating hole 111 is opened in a first working chamber 14 of the working cylinder 11;

[0104] The working piston 21 is cooperatively arranged in the working cylinder 11 , and the side of the working piston 21 facing away from the dual-valve mounting base 3 and the radial gap together form the first working chamber 14 , and the side of the working piston 21 facing the dual-valve mounting base 3 forms the second working chamber 15 .

[0105] According to some embodiments of the present application, a connecting cylinder 61 is provided on the dual-valve mounting base 3, and the connecting cylinder 61 is located on the side of the dual-valve mounting base 3 opposite to the piston rod 2. A floating piston 62 is provided in the connecting cylinder 61, and the storage chamber 8 is formed in the area between the floating piston 62 and the dual-valve mounting base 3, and an air chamber is formed between the side of the floating piston 62 facing away from the dual-valve mounting base 3 and the connecting cylinder 61.

[0106] In this embodiment, the connecting tube 61 is arranged coaxially with the piston rod 2, and the liquid storage channel 35 passes through the upper and lower sides of the dual-valve mounting base 3 along the axial direction of the piston rod 2, that is, the upper port of the liquid storage channel is connected to the bottom valve assembly, and the lower port is connected to the storage chamber 8. The flow direction of the damping liquid in the liquid storage channel 35 is controlled by the compression first passive valve 72 and the recovery compensation valve 73 on the bottom valve assembly.

[0107] Since the upper part of the storage chamber 8 in Example 1 is filled with gas, it is an oil-gas mixing structure. In this Example 2, the middle cylinder is removed, and the storage chamber 8 is separately set on the lower side of the double valve mounting base 3. In order to connect the second solenoid valve discharge chamber 34 with the storage chamber 8, the outlet 341 of the second solenoid valve discharge chamber in this embodiment is located on the lower side of the double valve mounting base 3. At the same time, a floating piston 62 is added to the storage chamber 8, and the lower side of the floating piston 62 is filled with gas. When the piston rod 2 moves up and down, the floating piston 62 can move up and down to achieve oil and gas isolation. It should be noted that the part not elaborated in detail in this embodiment can be understood by referring to the relevant structure in Example 1.

[0108] Example 3

[0109] A motor vehicle provided in an embodiment of the present application includes the dual solenoid valve adjustable shock absorber described in Example 1 or Example 2, and the shock absorber is arranged in the chassis of the motor vehicle.

[0110] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A dual solenoid valve adjustable shock absorber, characterized in that: include: A damping tube, the interior of which is filled with a damping liquid; A piston rod (2) is arranged in the damping tube and moves telescopically in the axial direction; A working piston (21) is arranged on the piston rod (2) and divides the interior of the damping tube into a first working chamber (14) and a second working chamber (15); A storage chamber (8) connected to the second working chamber (15); A double-valve mounting base (3), one side of which is connected to an end of the damping tube that is away from the extending direction of the piston rod (2), and a first solenoid valve (41) and a second solenoid valve (42) are provided on the double-valve mounting base (3); The first solenoid valve (41) is configured to adjust the damping force of the damping fluid from the first working chamber (14) to the second working chamber (15) when the piston rod (2) is extended, and the second solenoid valve (42) is configured to adjust the damping force of the damping fluid from the second working chamber (15) to the storage chamber (8) when the piston rod (2) is retracted.

2. The dual solenoid valve adjustable shock absorber according to claim 1, characterized in that: The inlet of the first solenoid valve (41) is connected to the first working chamber (14), and the outlet of the first solenoid valve (41) is connected to the second working chamber (15); the inlet of the second solenoid valve (42) is connected to the second working chamber (15), and the outlet of the second solenoid valve (42) is connected to the storage chamber (8).

3. The dual solenoid valve adjustable shock absorber according to claim 1, characterized in that: The damping tube comprises: A working cylinder (11), an intermediate cylinder (12) and an outer tube (13) are sequentially sleeved from the inside to the outside, wherein radial clearances are provided between the working cylinder (11), the intermediate cylinder (12) and the outer tube (13), and a communicating hole (111) is provided in a first working chamber (14) of the working cylinder (11); The working piston (21) is arranged in the working cylinder (11); the side of the working piston (21) facing away from the double valve mounting base (3) and the radial gap between the working cylinder (11) and the intermediate cylinder (12) together form the first working chamber (14); the side of the working piston (21) facing the double valve mounting base (3) forms the second working chamber (15); and the radial gap between the intermediate cylinder (12) and the outer tube (13) forms the storage chamber (8).

4. The dual solenoid valve adjustable shock absorber according to claim 1, characterized in that: The dual-valve mounting base (3) is provided with a first mounting hole (36) and a second mounting hole (37) for accommodating the first solenoid valve (41) and the second solenoid valve (42); the first mounting hole (36) and the second mounting hole (37) are separated from each other.

5. The dual solenoid valve adjustable shock absorber according to claim 1, characterized in that: The inlet end of the first solenoid valve (41) forms a chamber A (31), and the outlet end of the first solenoid valve (41) forms a first solenoid valve discharge chamber (32); the inlet end of the second solenoid valve (42) forms a chamber B (33), and the outlet end of the second solenoid valve (42) forms a second solenoid valve discharge chamber (34).

6. The dual solenoid valve adjustable shock absorber according to claim 5, characterized in that: The dual-valve mounting base (3) is provided with a chamber A inlet (311), a first solenoid valve discharge chamber outlet (321), a chamber B inlet (331) and a second solenoid valve discharge chamber outlet (341); the chamber A inlet (311) is connected to the first working chamber (14) and the chamber A (31); the first solenoid valve discharge chamber outlet (321) is connected to the first solenoid valve discharge chamber (32) and the second working chamber (15); the chamber B inlet (331) is connected to the second working chamber (15) and the chamber B (33); and the second solenoid valve discharge chamber outlet (341) is connected to the second solenoid valve discharge chamber (34) and the storage chamber (8).

7. The dual solenoid valve adjustable shock absorber according to claim 1, characterized in that: The dual-valve mounting base (3) is provided with a liquid storage channel (35), the liquid storage channel inlet (351) is communicated with the second working chamber (15), and the liquid storage channel outlet (352) is communicated with the storage chamber (8).

8. The dual solenoid valve adjustable shock absorber according to claim 6, characterized in that: A bottom valve assembly is provided at one end of the damping tube connected to the double valve mounting base (3), and the bottom valve assembly includes a bottom valve seat (71). The bottom valve seat (71) is embedded in the double valve mounting base (3), and a second working chamber annular groove (711) is provided on one end of the bottom valve seat (71) connected to the double valve mounting base (3). The second working chamber annular groove (711) is communicated with the first solenoid valve discharge chamber outlet (321) and the chamber B inlet (331). The other end of the bottom valve seat (71) is provided with a second working chamber leakage hole (712), and the second working chamber leakage hole (712) is communicated with the second working chamber annular groove (711) and the second working chamber (15).

9. The dual solenoid valve adjustable shock absorber according to claim 1, characterized in that: The damping tube comprises: A working cylinder (11) and an outer tube (13), wherein the outer tube (13) is sleeved on the outside of the working cylinder (11) and has a radial gap with the working cylinder (11), and a communicating hole (111) is provided in a first working chamber (14) of the working cylinder (11); The working piston (21) is arranged in the working cylinder (11), and the side of the working piston (21) facing away from the dual-valve mounting base (3) and the radial gap together form the first working chamber (14), and the side of the working piston (21) facing the dual-valve mounting base (3) forms the second working chamber (15).

10. The dual solenoid valve adjustable shock absorber according to claim 9, characterized in that: The dual-valve mounting base (3) is provided with a connecting tube (61), and the connecting tube (61) is located on the side of the dual-valve mounting base (3) opposite to the damping tube. A floating piston (62) is arranged in the connecting tube (61), and the area between one side of the floating piston (62) and the dual-valve mounting base (3) forms the storage chamber (8), and the other side forms an air chamber.

11. A dual solenoid valve adjustable shock absorber, characterized in that: include: A damping tube, the interior of which is filled with a damping liquid; A piston rod (2) is arranged in the damping tube and moves telescopically in the axial direction; A working piston (21) is arranged on the piston rod (2) and divides the interior of the damping tube into a first working chamber (14) and a second working chamber (15); A storage chamber (8) connected to the second working chamber (15); A double-valve mounting base (3), one side of which is connected to an end of the damping tube that is away from the extending direction of the piston rod (2), and a first solenoid valve (41) and a second solenoid valve (42) are provided on the double-valve mounting base (3); The first solenoid valve (41) is configured to adjust the damping force of the damping fluid from the first working chamber (14) to the second working chamber (15) when the piston rod (2) is extended, and the second solenoid valve (42) is configured to adjust the damping force of the damping fluid from the second working chamber (15) to the storage chamber (8) when the piston rod (2) is retracted; A first one-way valve (51) and a second one-way valve (52) are also provided on the double-valve mounting base (3), wherein the first one-way valve (51) is connected in series to the inlet end of the first solenoid valve (41), and the second one-way valve (52) is connected in series to the inlet end of the second solenoid valve (42).

12. A motor vehicle, characterized in that: A dual solenoid valve adjustable shock absorber comprising any one of claims 1-11.

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