Damping device and suspension system

Abstract

The utility model provides a damping device and a suspension system. The damping device comprises a base, an external oil way connector, a high-pressure energy accumulator connector and a low-pressure energy accumulator connector, an electromagnetic valve containing cavity is further formed in the base, the electromagnetic valve containing cavity is communicated with the external oil way connector, the high-pressure energy accumulator connector and the low-pressure energy accumulator connector, and a two-way adjustable electromagnetic valve is arranged in the electromagnetic valve containing cavity and communicated with the high-pressure energy accumulator connector and the low-pressure energy accumulator connector. The electromagnetic valve is arranged in the electromagnetic valve containing cavity and comprises a piston structure, the piston structure divides the electromagnetic valve containing cavity into a first cavity and a second cavity, and the bidirectional adjustable electromagnetic valve comprises a first passage and a second passage which are connected with the first cavity and the second cavity. The first cavity is directly communicated with the high-pressure energy accumulator connector, and the second cavity is directly communicated with the external oil way connector and the low-pressure energy accumulator connector. According to the utility model, the pipeline layout of the hydraulic system can be simplified, and the control complexity and the maintenance difficulty are reduced.

Description

Technical Field

[0001] This utility model relates to the field of automotive suspension, and more specifically, to a damping device and a suspension system including the damping device. Background Technology

[0002] The hydropneumatic suspension system provides vehicle support and vibration reduction through the compressibility of gas and the transmission effect of liquid. The adjustment of stiffness plays an important role in achieving vehicle comfort and handling stability under different operating conditions.

[0003] Multi-stage accumulator design is a common technical solution for adjusting suspension stiffness. It involves setting up multiple accumulator chambers in the suspension system and filling them with gas at different pressures, selectively activating different accumulators based on load conditions. Under light load conditions, only the low-pressure accumulator is active, resulting in lower suspension stiffness and improved comfort. Under heavy load or large deformation conditions, both high-pressure and low-pressure accumulators work together. By rationally designing the volume and charging pressure of the high-pressure accumulator, a significant increase in suspension stiffness is achieved, enhancing support capacity and handling performance. To enable rapid switching between different operating conditions, an electromagnetic shut-off valve is typically installed between the high-pressure and low-pressure accumulators to adjust the stiffness mode and optimize system performance. Utility Model Content

[0004] According to one aspect of the present invention, a damping device is provided, comprising: a base including an external oil circuit interface, a high-pressure accumulator interface, and a low-pressure accumulator interface; the base further comprising a solenoid valve receiving cavity, the solenoid valve receiving cavity being connected to the external oil circuit interface, the high-pressure accumulator interface, and the low-pressure accumulator interface respectively; a bidirectional adjustable solenoid valve disposed within the solenoid valve receiving cavity; the bidirectional adjustable solenoid valve comprising a piston structure, the piston structure dividing the solenoid valve receiving cavity into a first chamber and a second chamber; the bidirectional adjustable solenoid valve comprising a first passage and a second passage connecting the first chamber and the second chamber; the bidirectional adjustable solenoid valve being configured to control the flow direction of fluid in the first passage and the second passage to be opposite and to adjust the opening and closing state of the first passage and the second passage; wherein the first chamber is directly connected to the high-pressure accumulator interface, and the second chamber is directly connected to the external oil circuit interface and the low-pressure accumulator interface respectively.

[0005] For example, in the damping device according to an embodiment of the present invention, the bidirectional adjustable solenoid valve further includes an electromagnetic actuation part, the electromagnetic actuation part and the piston structure are arranged along the axial direction of the bidirectional adjustable solenoid valve, and in the axial direction of the bidirectional adjustable solenoid valve, the electromagnetic actuation part is disposed on the side of the piston structure away from the low-pressure accumulator interface.

[0006] For example, in the damping device according to an embodiment of the present invention, in the axial direction of the bidirectional adjustable solenoid valve, the low-pressure accumulator interface and the external oil circuit interface are disposed on one side of the bidirectional adjustable solenoid valve and are spaced apart from the bidirectional adjustable solenoid valve, the high-pressure accumulator structure overlaps at least partially with the bidirectional adjustable solenoid valve in a direction perpendicular to the axial direction of the bidirectional adjustable solenoid valve, and the distance between the external opening of the high-pressure accumulator interface and the central axis of the solenoid valve receiving cavity is greater than the distance between the external opening of the low-pressure accumulator and the central axis of the solenoid valve receiving cavity.

[0007] For example, in the damping device according to an embodiment of the present invention, a high-voltage accumulator and a low-voltage accumulator are further included, wherein the high-voltage accumulator is connected to the high-voltage accumulator interface and the low-voltage accumulator is connected to the low-voltage accumulator interface.

[0008] For example, in the damping device according to an embodiment of the present invention, the base further includes an attitude sensor interface, which is directly connected to the first chamber.

[0009] For example, in the damping device according to an embodiment of the present invention, one end of the solenoid valve receiving cavity in the extension direction of its central axis includes an externally facing mounting opening. The external oil circuit interface and the low-pressure accumulator interface are disposed on the side of the solenoid valve receiving cavity away from the mounting opening. The solenoid valve receiving cavity includes a first segment near the mounting opening and a second segment connected to the first segment. The inner diameter of the first segment is larger than the inner diameter of the second segment. The bidirectional adjustable solenoid valve includes a coil mounting seat. A first part of the coil mounting seat is disposed in the first segment, and a second part of the coil mounting seat is disposed in the second segment. The attitude sensor interface is disposed on the side of the high-pressure accumulator interface away from the low-pressure accumulator interface. The two ends of the attitude sensor interface respectively include a first opening connected to the first chamber and a second opening connected to the outside of the base. The second opening of the attitude sensor interface is further away from the central axis of the solenoid valve receiving cavity than the first opening of the attitude sensor interface.

[0010] For example, in the damping device according to an embodiment of the present invention, both the first chamber and the second chamber are located in the second segment, and the first chamber is closer to the mounting opening than the second chamber. In the direction perpendicular to the central axis of the solenoid valve receiving cavity, the attitude sensor interface at least partially overlaps with the first segment, and the first opening of the attitude sensor interface is connected to the first chamber through a flow path located in the base.

[0011] For example, in the damping device according to an embodiment of the present invention, the central axes of the low-pressure accumulator interface and the external interface are substantially coincident.

[0012] For example, in the damping device according to an embodiment of the present invention, the base further includes a pressure sensor interface, which is directly connected to the second chamber.

[0013] For example, in the damping device according to an embodiment of the present invention, the central axis of the pressure sensor interface is substantially coincident with the central axis of the solenoid valve mounting base, and substantially perpendicular to the central axis of the low-pressure accumulator interface.

[0014] For example, in a damping device according to an embodiment of the present invention, the bidirectional adjustable solenoid valve is configured to be fixed relative to the solenoid valve receiving cavity, the outer periphery of the piston structure includes at least two circumferentially extending grooves, the at least two grooves being separated from each other in the axial direction along the bidirectional adjustable solenoid valve, and the damping device further includes at least two annular sealing rings, the at least two annular sealing rings being respectively disposed in the at least two grooves to seal the gap between the piston structure and the inner wall of the solenoid valve receiving cavity.

[0015] According to another aspect of the present invention, a suspension system is provided, comprising a damping device and a shock absorber as described in any of the above embodiments, wherein the oil port of the shock absorber and the external interface of the damping device are connected to each other via oil pipes. Attached Figure Description

[0016] Figure 1 This is a cross-sectional structural diagram of a damping device according to an embodiment of the present invention.

[0017] Figure 2 This is a schematic cross-sectional view of the bidirectional solenoid valve in a damping device according to an embodiment of the present invention.

[0018] Figure 3 This is a side view of the base of a damping device according to an embodiment of the present invention.

[0019] Figure 4 For the base along Figure 3 The sectional view taken by line AA in the diagram.

[0020] Figure 5 For the base along Figure 3 The sectional view taken from line BB in the middle.

[0021] Figure 6 This is a schematic block diagram of a suspension system according to an embodiment of the present invention.

[0022] Reference numerals: 100-Base; 101-Solenoid valve housing; 1011-First chamber; 1012-Second chamber; 1010-Mounting opening; 121-External oil circuit interface; 122-High-pressure accumulator interface; 123-Low-pressure accumulator interface; 124-Attitude sensor interface; 1241-First opening; 1242-Second opening; 125-Pressure sensor interface; 131-First section; 132-Second section; 140-Fixing component; 200-Bidirectional adjustable solenoid valve; 201-First passage; 202-Second passage; 210-Piston structure; 211-Groove; 212-Annular seal; 213-Coil mounting base; 2131-First part; 2132-Second part; 214-Annular seal; 220-Electromagnetic actuation part. Detailed Implementation

[0023] To more fully illustrate the technical concept and specific implementation of this utility model, the structure, operation process, and possible technical effects of the embodiments of this utility model are described below with reference to the accompanying drawings and exemplary embodiments. The embodiments of this utility model involve improvements and innovations in several technical fields. The solutions provided based on these improvements are widely applicable in different scenarios and can be implemented independently or in combination with other technical solutions. This utility model is not limited to the specific embodiments described. In practical applications, those skilled in the art can make various appropriate adjustments without departing from the spirit of this utility model.

[0024] In typical multi-stage accumulator suspension systems, an electromagnetic shut-off valve is required between the high-pressure and low-pressure accumulators to allow for the allocation of different accumulator levels to control fluid damping under varying road conditions. Furthermore, a damping valve is also needed in the fluid flow path to adjust fluid damping. However, this configuration requires a relatively complex structure and lacks sufficient adjustment capability for the overall suspension system. This invention provides a damping device comprising a base and a bidirectional adjustable solenoid valve. The base includes an external oil circuit interface, a high-pressure accumulator interface, and a low-pressure accumulator interface. An internal solenoid valve housing is also provided within the base, communicating with the external oil circuit interface, the high-pressure accumulator interface, and the low-pressure accumulator interface, respectively. The bidirectional adjustable solenoid valve is disposed within the solenoid valve housing and includes a piston structure that divides the solenoid valve housing into a first chamber and a second chamber. The bidirectional adjustable solenoid valve includes a first passage and a second passage connecting the first and second chambers, and is configured to control the flow direction of fluid in the first and second passages to be opposite and to adjust the opening and closing states of the first and second passages. The first chamber is directly connected to the high-voltage accumulator interface, and the second chamber is directly connected to the external oil circuit interface and the low-voltage accumulator interface, respectively.

[0025] In embodiments of this utility model, based on the bidirectional adjustable solenoid valve's bidirectional conduction and the ability to adjust the opening and closing states of the flow path in both directions, by using the bidirectional adjustable solenoid valve in conjunction with the high-pressure accumulator, low-pressure accumulator, and external oil circuit interface (for connection with the shock absorber), only the bidirectional adjustable solenoid valve needs to be installed in the oil circuit between the high-pressure accumulator and the external oil circuit interface. By using the bidirectional adjustable solenoid valve, on the one hand, the participation of the high-pressure and low-pressure accumulators in oil circuit flow control can be controlled under different road conditions; on the other hand, the damping force of the oil circuit flow can be adjusted simultaneously, thus eliminating the need for separate solenoid shut-off valves and damping valves. Furthermore, the base can be an integrated structure, with flow paths connecting the various interfaces provided within the integrated base structure, making the product structure more compact and easier to assemble based on the simplified connection method described above.

[0026] The technical solution of this utility model will be further described in detail below with reference to the embodiments of this utility model, so as to make the solution and advantages of this utility model clearer.

[0027] Figure 1 This is a cross-sectional structural schematic diagram of a damping device according to an embodiment of the present invention. Figure 2 This is a schematic cross-sectional view of the bidirectional solenoid valve in a damping device according to an embodiment of the present invention. For ease of illustration, in... Figure 2 The inner wall of the chamber housing the bidirectional adjustable solenoid valve is also shown. (For example...) Figure 1 and Figure 2 As shown, the damping device according to this utility model includes a base 100. The base 100 can be a one-piece structure. For example, it can be obtained by machining various cavities or flow paths on the same metal block, or it can be obtained by casting a structure including some cavities or flow paths, and then machining the remaining cavities or flow paths on the structure. In addition, the above-mentioned one-piece structure is not limited to being made from a single piece of metal, and can also be made by fixing multiple metal parts together.

[0028] like Figure 1As shown, the base 100 includes an external oil circuit interface 121, a high-pressure accumulator interface 122, and a low-pressure accumulator interface 123. For example, the external oil circuit interface 121 is used to connect to the oil circuit of an external device or equipment. For instance, the external oil circuit interface 121 can be connected to a shock absorber to receive fluid from or inject fluid into the shock absorber, thereby regulating fluid damping. For example, the high-pressure accumulator interface 122 is used to connect to a high-pressure accumulator, allowing fluid within the base 100 to flow into the high-pressure accumulator or allowing fluid in the high-pressure accumulator to flow into the base 100. Similarly, the low-pressure accumulator interface 123 is used to connect to a low-pressure accumulator and also for fluid exchange between the base 100 and the low-pressure accumulator. The base 100 also has a solenoid valve receiving cavity 101, which is connected to the external oil circuit interface 121, the high-pressure accumulator interface 122, and the low-pressure accumulator interface 123, respectively.

[0029] The damping device according to an embodiment of the present invention further includes a bidirectional adjustable solenoid valve 200 disposed within the solenoid valve receiving cavity 101. Combined with... Figure 1 and Figure 2 It can be seen that the bidirectional adjustable solenoid valve 200 includes a piston structure 210, which divides the solenoid valve receiving chamber 101 into a first chamber 1011 and a second chamber 1012. The bidirectional adjustable solenoid valve 200 includes a first passage 201 and a second passage 202 connecting the first chamber 1011 and the second chamber 1012, and is configured to control the flow direction of fluid in the first passage 201 and the second passage 202 to be opposite and to adjust the opening and closing states of the first passage and the second passage. The first chamber 1011 is directly connected to the high-pressure accumulator interface 122, and the second chamber 1012 is directly connected to the external oil circuit interface 121 and the low-pressure accumulator interface 123, respectively.

[0030] It should be noted that, Figure 1 and Figure 2 The bidirectional adjustable solenoid valve structure shown is merely exemplary. According to the embodiments of this utility model, there are no particular limitations on the bidirectional adjustable solenoid valve, as long as it can achieve the above-mentioned functions, namely, being able to divide the solenoid valve housing cavity into a first chamber and a second chamber, and being able to adjust the flow direction and opening / closing state of the two passages connecting the first and second chambers. Figure 2As shown, the first passage 201 represents the flow from the second chamber 1012 to the first chamber 1011, and the second passage 202 represents the flow from the first chamber 1011 to the second chamber 1012. The fluid flow directions in the first passage 201 and the second passage 202 are opposite. The bidirectional adjustable solenoid valve 200 controls the corresponding valve plate through its internal electromagnetic braking component, thereby adjusting and controlling the opening and closing states of the two passages. Here, the adjustment of the "opening and closing state" includes a fully open state, a fully closed state, and states with different degrees of opening between the fully open and fully closed states.

[0031] For example, the first chamber 1011 is directly connected to the high-pressure accumulator interface 122, and the second chamber 1012 is directly connected to both the external oil circuit interface 121 and the low-pressure accumulator interface 123. Here, "direct connection" does not mean direct contact between the two, but rather that they can be connected through a flow path without the need for valves or other structures to control the opening and closing of the fluid path. For example, combined with... Figure 1 and Figure 2 As shown, both the external oil circuit interface 121 and the low-pressure accumulator interface 123 are connected to the second chamber 1012 via the flow path 108, and the first chamber 1011 is also connected to the high-pressure accumulator interface 122 via the flow path 108. Furthermore, since both the external oil circuit interface 121 and the low-pressure accumulator interface 123 are connected to the second chamber 1012 via the flow path 108, the low-pressure accumulator interface 123 is effectively directly connected to the external oil circuit interface 121. In this case, fluid from the shock absorber can directly enter the low-pressure accumulator, and fluid flowing out of the low-pressure accumulator can also directly enter the shock absorber. However, a bidirectional adjustable solenoid valve is provided between the external oil circuit interface 121 and the high-pressure accumulator interface 122 for fluid control and damping adjustment.

[0032] For example, such as Figure 1 and Figure 2 As shown, the bidirectional adjustable solenoid valve 200 also includes an electromagnetic actuator 220. The electromagnetic actuator 200 is used to drive the valve structure to move under the control of an electrical signal to control the opening and closing state of the passage as described above. This invention does not impose any particular limitation on the specific structure of the electromagnetic actuator; therefore, it is only shown schematically in the accompanying drawings with boxes. The electromagnetic actuator 220 and the piston structure 210 are arranged along the axial direction (lateral direction in the figure) of the bidirectional adjustable solenoid valve 200. In the axial direction of the bidirectional adjustable solenoid valve 200, the electromagnetic actuator 220 is located on the side of the piston structure 210 away from the low-pressure accumulator interface 123.

[0033] like Figure 1As shown, in the axial direction of the bidirectional adjustable solenoid valve 200, the low-pressure accumulator interface 123 and the external oil circuit interface 121 are disposed on one side of the bidirectional adjustable solenoid valve 200 and are spaced apart from the bidirectional adjustable solenoid valve 200. The high-pressure accumulator interface 122 overlaps at least partially with the bidirectional adjustable solenoid valve 200 in a direction perpendicular to the axial direction of the bidirectional adjustable solenoid valve 200 (vertical direction in the figure) (e.g., overlaps with the electromagnetic actuator).

[0034] like Figure 2 As shown, the distance between the external opening of the high-pressure accumulator interface 122 (i.e., the opening located on the base surface) and the central axis of the solenoid valve receiving cavity is greater than the distance between the external opening of the low-pressure accumulator (i.e., the opening located on the base surface) and the central axis of the solenoid valve receiving cavity. As described above, since the bidirectional adjustable solenoid valve is located between the high-pressure accumulator interface and the external oil circuit interface, and the low-pressure accumulator needs to be directly connected to the external oil circuit interface, a connection path needs to be provided between the external oil circuit interface and the low-pressure accumulator interface. Placing the electromagnetic actuation part 220 of the bidirectional solenoid valve and the wire lead-out structure on the side of the piston structure away from the external oil circuit interface and the low-pressure accumulator interface facilitates a reasonable arrangement of each part. In this case, the position of the high-pressure accumulator interface 122 is close to the electromagnetic actuation part 220 of the bidirectional adjustable solenoid valve, and thus farther from the central axis of the solenoid valve receiving cavity 101 than the low-pressure accumulator interface 123.

[0035] like Figure 1 As shown, the damping device according to an embodiment of the present invention further includes a high-voltage accumulator 300 and a low-voltage accumulator 400. The high-voltage accumulator 300 is connected to the high-voltage accumulator interface 122, and the low-voltage accumulator 400 is connected to the low-voltage accumulator interface 123. Figure 1 The image only schematically shows the installation positions of the high-voltage accumulator 300 and the low-voltage accumulator 400, without showing them installed on the base. With the high-voltage accumulator 300 and the low-voltage accumulator 400 respectively installed at the high-voltage accumulator interface 122 and the low-voltage accumulator interface 123, they participate in the fluid control of the suspension system under different road conditions, which will not be elaborated further here.

[0036] For example, such as Figure 1 As shown, the base 100 of the damping device according to an embodiment of the present invention further includes an attitude sensor interface 124. The attitude sensor interface 124 is directly connected to the first chamber 1011. The attitude sensor interface 124 can be used to mount an attitude sensor to detect the suspension operating status. For example, the attitude sensor can also be a pressure sensor, which is used to detect the fluid pressure in the first chamber 1011.

[0037] like Figure 1As shown, the attitude sensor interface 124 is located on the side of the high-voltage accumulator interface 123 away from the low-voltage accumulator interface 123. The attitude sensor interface 124 has a first opening 1241 connecting to the first chamber 1011 and a second opening 1242 connecting to the outside of the base 100, respectively. The second opening 1242 of the attitude sensor interface 124 is further away from the central axis of the solenoid valve receiving chamber 101 than the first opening 1241. In other words, the attitude sensor interface 124 is set in an inclined state. This setting takes into account the orientation of the bidirectional adjustable solenoid valve as described above and the structural requirements of the bidirectional adjustable solenoid valve itself, thereby making the flow path connecting the attitude sensor interface 124 and the first chamber 1011 inclined, thus shortening the flow path between the high-voltage accumulator interface 124 and the first chamber 1011 used to connect them.

[0038] like Figure 1 and Figure 2 As shown, the solenoid valve receiving cavity 101 includes an externally facing mounting opening 1010. A bidirectional adjustable solenoid valve 200 can be installed into the solenoid valve receiving cavity 101 through this mounting opening 1010, and a fixing device is added at this mounting opening 1010 to fix the bidirectional adjustable solenoid valve relative to the base 100. Any suitable fixing device in the art can be used, and this invention does not particularly limit this. The solenoid valve receiving cavity 101 includes a first segment 131 near the mounting opening 1010 and a second segment 132 connected to the first segment 131. The inner diameter of the first segment 131 is larger than the inner diameter of the second segment 132. Because the inner diameters of the first segment 131 and the second segment 132 are different, a stepped structure is formed at the connection between the first segment 131 and the second segment 132. The bidirectional adjustable solenoid valve 200 includes a coil mounting seat 213, a first portion 2131 of the coil mounting seat 213 is disposed within the first segment 131, and a second portion 2132 of the coil mounting seat 213 is disposed within the second segment 132. The outer diameter of the first part 2131 of the coil mounting base 213 is larger than the outer diameter of the second part 2132 of the coil mounting base 213. For example, the outer diameters of the first part 2131 and the second part 2132 of the coil mounting base 213 match the inner diameters of the first segment 131 and the second segment 132 of the solenoid valve receiving cavity 101, respectively, so that the coil mounting base 213 can be fixedly installed in the solenoid valve receiving cavity, thereby further enabling the bidirectional adjustable solenoid valve 200 to be fixedly installed in the solenoid valve receiving cavity. For example, the coil mounting base 213 serves to fix the position of the bidirectional adjustable solenoid valve on one hand, and on the other hand, it is also provided with holes for the lead wires for supplying power to the electromagnetic actuator 220 of the bidirectional adjustable solenoid valve.

[0039] like Figure 1 and Figure 2As shown, the first chamber 1011 is closer to the mounting opening than the second chamber 1012. For example, the outer periphery of the second part 2132 of the solenoid valve mounting base 213 is provided with an annular groove, and an annular sealing ring 214 is provided in the annular groove, thereby dividing the space between the annular sealing ring 214 and the piston structure 210 of the solenoid valve receiving cavity into the first chamber 1011.

[0040] from Figure 1 As can be seen, both the first chamber 1011 and the second chamber 1012 are located within the second section 132 of the solenoid valve receiving chamber 101. Therefore, the first opening 1241 of the attitude sensor interface 124 is connected to the second section 132 of the solenoid valve receiving chamber 101. For example, it is connected to the second section 132 of the solenoid valve receiving chamber 101 via a flow path located within the base. For example, the first opening 1241 is first connected to the flow path between the high-voltage accumulator interface 122 and the first chamber 1011 via an inclined flow path, and then connected to the second section 132 of the solenoid valve receiving chamber 101 via the flow path between the high-voltage accumulator interface 122 and the first chamber 1011.

[0041] like Figure 1 As shown, the central axes of the low-pressure accumulator interface 123 and the external oil circuit interface 121 coincide. This arrangement facilitates the exchange of fluid from the outside (e.g., a shock absorber) with the fluid inside the low-pressure accumulator.

[0042] In some examples, such as Figure 1 As shown, the base 100 also includes a pressure sensor interface 125, which is directly connected to the second chamber 1012. Since the external oil circuit interface 121 and the low-pressure accumulator interface 123 are directly connected to the second chamber 1012, the pressure sensor interface 125 is also directly connected to these interfaces. A pressure sensor can be installed in the pressure sensor interface 123 to measure the pressure of the fluid entering and exiting the shock absorber for suspension system control. However, it should be noted that the pressure sensor interface 125 may not be equipped with a pressure sensor; for example, it can be sealed using a sealed interface as needed, and a pressure sensor can be installed only when required. For example, as... Figure 1 As shown, the central axis of the pressure sensor interface 125 is basically coincident with the central axis of the solenoid valve receiving cavity 101, and is basically perpendicular to the central axis of the low-pressure accumulator interface 123.

[0043] like Figure 1 and Figure 2As shown, the bidirectional adjustable solenoid valve 200 is configured to be fixed relative to the solenoid valve receiving cavity 101. The outer periphery of the piston structure 210 includes at least two circumferentially extending grooves 211, which are separated from each other in the axial direction along the bidirectional adjustable solenoid valve 200. The damping device also includes at least two annular sealing rings 212, which are respectively disposed in the at least two grooves 211 to seal the gap between the piston structure 210 and the inner wall of the solenoid valve receiving cavity 101. In the damping device according to the embodiment of the present invention, since the bidirectional adjustable solenoid valve 200 and the solenoid valve receiving cavity 101 are fixed relative to each other, more specifically, the piston structure 210 of the bidirectional adjustable solenoid valve 200 and the solenoid valve receiving cavity 101 are fixed relative to each other, there is no need to provide a sealing gasket structure suitable for sliding sealing on the outside of the piston structure 210; a good seal can be obtained by the annular sealing ring structure as described above. Figure 1 and Figure 2 As shown, the portion from the left side of the annular sealing ring 212 to the annular sealing ring 214 forms the first chamber 1011, and the portion from the right side of the annular sealing ring 212 forms the second chamber 1012.

[0044] Figure 3 This is a side view of the base of a damping device according to an embodiment of the present invention, for example, a side view viewed from the side where a low-voltage accumulator interface is provided. Figure 4 For the base along Figure 3 The sectional view taken by line AA in the diagram. Figure 5 For the base along Figure 3 The sectional view taken by line BB.

[0045] from Figure 4 Viewed from the center, line AA essentially intersects the central axis of the solenoid valve housing 101. (Cross-sectional view taken along line AA) Figure 4 The image shows the solenoid valve housing 101, the low-pressure accumulator interface 123, the external oil circuit interface 121, the pressure sensor interface 125, and the communication path 108 connecting the low-pressure accumulator interface 123, the external oil circuit interface 121, the pressure sensor interface 125, and the solenoid valve housing 101. Therefore, the central axes of the solenoid valve housing 101, the low-pressure accumulator interface 123, the external oil circuit interface 121, and the pressure sensor interface 125 are approximately in the same plane. Furthermore, from... Figure 4We can also see the first section 131 and the second section 132 of the solenoid valve receiving cavity 101. As mentioned above, the first section 131 is mainly used to accommodate the first part of the coil mounting base of the bidirectional adjustable solenoid valve and the fixing device disposed on the outside of the coil mounting base, while the second section 132 is used to accommodate the other parts of the bidirectional adjustable solenoid valve. The fact that the inner diameter of the second section 132 is smaller than the inner diameter of the first section 131 does not mean that the inner diameter of the second section 132 is equal everywhere within the second section 132, but rather that the inner diameter of the second section 132 may not be equal at all points. Figure 4 It can also be seen that, because connecting components need to be installed within each interface, the inner diameters of the low-pressure accumulator interface 123, the external oil circuit interface 121, and the pressure sensor interface 125 are all larger than the inner diameter of the flow path to which they are connected. Furthermore, Figure 4 The image also shows a portion of the structure of the high-voltage accumulator interface 122, which will be referenced. Figure 5 To provide a more detailed description.

[0046] Figure 5 and Figure 4 For sectional views at different locations, from Figure 5 The high-voltage accumulator interface 123 and the attitude sensor interface 124 can be seen, as well as the flow path connecting the high-voltage accumulator interface 123 and the attitude sensor interface 124 to the solenoid valve housing. This can be compared... Figure 4 and Figure 5 As can be seen, in Figure 4 Only a small portion of the high-voltage accumulator interface 123 is displayed, and the attitude sensor interface is not visible. Figure 5 The high-voltage accumulator interface, attitude sensor interface, and their connected flow paths can be seen. The central axes of the high-voltage accumulator interface and the attitude sensor interface are roughly in the same plane (the plane where line BB is located), while this plane is a different plane from the plane containing the central axes of the solenoid valve housing 101, the low-voltage accumulator interface 123, the external oil circuit interface 121, and the pressure sensor interface 125. It should be noted that although the above is based on... Figures 3-5 The relative positions of various interfaces and the solenoid valve receiving cavity are described, but the damping device according to this utility model is not limited thereto, and the position of the interface relative to the solenoid valve receiving cavity can also be adjusted according to actual needs.

[0047] In addition, from Figure 4 and Figure 5 Also visible is a fixing member 140, which is used to secure the damping device to other external devices or equipment, such as to a suitable location on a vehicle. The fixing member 140 can be appropriately adjusted based on the stability and convenience of installing the damping device.

[0048] Figure 6This is a schematic block diagram of the suspension system according to the present invention. As shown in the figure, the suspension system includes a damping device and a shock absorber, and the oil port of the shock absorber and the external oil passage interface of the damping device are connected to each other through an oil pipe. The damping device in this embodiment can be any of the damping devices described in the above embodiments.

[0049] The suspension system according to this utility model includes a high-voltage accumulator, a low-voltage accumulator, a bidirectional adjustable solenoid valve, and a shock absorber.

[0050] For example, when a vehicle travels on a bumpy road, the shock absorbers generate a large amount of vibrational energy due to the up-and-down movement of the wheels. This energy is transferred to a high-pressure accumulator for storage via fluid. At this time, a bidirectional adjustable solenoid valve, according to instructions from the vehicle control system, is in a compressed state, controlling the flow direction and speed of the fluid to achieve precise damping adjustment. During the rebound phase, the hydraulic energy stored in the high-pressure accumulator is released and guided to the shock absorbers through the bidirectional adjustable solenoid valve, providing additional damping force to stabilize the vehicle's posture. Simultaneously, the low-pressure accumulator collects the returned hydraulic oil for later use, thus achieving energy recycling.

[0051] In existing technologies, to achieve similar functionality, a solenoid shut-off valve is typically installed between the high-pressure and low-pressure accumulators to cut off the hydraulic oil return path. Additionally, a separate damping valve is required at the shock absorber end for damping adjustment. This complex design increases the cost and failure risk of the hydraulic system. However, this invention directly installs a bidirectional adjustable solenoid valve between the high-pressure accumulator and the shock absorber, eliminating the need for additional solenoid shut-off and damping valves. This simplifies the piping layout of the hydraulic system and reduces control complexity and maintenance difficulty.

[0052] Furthermore, the structural design of this invention significantly improves the response speed of the hydraulic system. Compared to the series configuration of the solenoid shut-off valve and the damping valve, this invention directly connects the high-pressure accumulator and the shock absorber through a bidirectional adjustable solenoid valve, reducing the hydraulic oil flow path and enabling the system to respond to changes in road conditions within milliseconds. This rapid response capability is particularly important in high-speed driving or emergency obstacle avoidance situations, effectively improving vehicle safety and handling performance. This invention not only simplifies the structural design of the hydraulic system and reduces manufacturing and maintenance costs, but also significantly improves the system's dynamic response capability and reliability.

[0053] It should be noted that the specific embodiments of this utility model are provided merely to illustrate the principles and technical features of the invention, and do not constitute a limitation on this utility model. Those skilled in the art can make various modifications and improvements to the specific embodiments within the spirit and scope of this utility model. In particular, for different application scenarios and implementation requirements, the specific structure can be reasonably adjusted to adapt to actual needs without departing from the essential content of this utility model. Therefore, all equivalent substitutions or improvements made within the core idea of ​​this utility model should be considered to fall within the protection scope of this utility model.

Claims

1. A damping device, characterized in that, include: The base includes an external oil circuit interface, a high-voltage accumulator interface, and a low-voltage accumulator interface. The base also contains a solenoid valve receiving cavity, which is connected to the external oil circuit interface, the high-voltage accumulator interface, and the low-voltage accumulator interface, respectively. A bidirectional adjustable solenoid valve is disposed within the solenoid valve receiving cavity. The bidirectional adjustable solenoid valve includes a piston structure that divides the solenoid valve receiving cavity into a first chamber and a second chamber. The bidirectional adjustable solenoid valve includes a first passage and a second passage connecting the first chamber and the second chamber. The bidirectional adjustable solenoid valve is configured to control the flow direction of fluid in the first passage and the second passage to be opposite and to adjust the opening and closing states of the first passage and the second passage. The first chamber is directly connected to the high-voltage accumulator interface, and the second chamber is directly connected to the external oil circuit interface and the low-voltage accumulator interface, respectively.

2. The damping device according to claim 1, characterized in that, The bidirectional adjustable solenoid valve further includes an electromagnetic actuator. The electromagnetic actuator and the piston structure are arranged along the axial direction of the bidirectional adjustable solenoid valve. In the axial direction of the bidirectional adjustable solenoid valve, the electromagnetic actuator is located on the side of the piston structure away from the low-pressure accumulator interface.

3. The damping device according to claim 2, characterized in that, In the axial direction of the bidirectional adjustable solenoid valve, the low-pressure accumulator interface and the external oil circuit interface are located on one side of the bidirectional adjustable solenoid valve and are spaced apart from it. The high-pressure accumulator interface at least partially overlaps with the bidirectional adjustable solenoid valve in a direction perpendicular to its axial direction. The distance between the external opening of the high-voltage accumulator interface and the central axis of the solenoid valve cavity is greater than the distance between the external opening of the low-voltage accumulator and the central axis of the solenoid valve cavity.

4. The damping device according to any one of claims 1-3, characterized in that, It also includes a high-voltage accumulator and a low-voltage accumulator, wherein the high-voltage accumulator is connected to the high-voltage accumulator interface and the low-voltage accumulator is connected to the low-voltage accumulator interface.

5. The damping device according to claim 4, characterized in that, The base also includes an attitude sensor interface, which is directly connected to the first chamber.

6. The damping device according to claim 5, characterized in that, The solenoid valve housing includes an outwardly facing mounting opening at one end of its central axis extension direction. The external oil circuit interface and the low-pressure accumulator interface are located on the side of the solenoid valve housing away from the mounting opening. The solenoid valve receiving cavity includes a first section near the mounting opening and a second section connected to the first section. The inner diameter of the first section is larger than the inner diameter of the second section. The bidirectional adjustable solenoid valve includes a coil mounting base. A first part of the coil mounting base is disposed within the first section, and a second part of the coil mounting base is disposed within the second section. The attitude sensor interface is located on the side of the high-voltage accumulator interface away from the low-voltage accumulator interface. The two ends of the attitude sensor interface respectively include a first opening connected to the first chamber and a second opening connected to the outside of the base. The second opening of the attitude sensor interface is further away from the central axis of the solenoid valve receiving chamber than the first opening of the attitude sensor interface.

7. The damping device according to claim 6, characterized in that, Both the first chamber and the second chamber are located in the second segment, and the first chamber is closer to the mounting opening than the second chamber. In a direction perpendicular to the central axis of the solenoid valve receiving cavity, the attitude sensor interface at least partially overlaps with the first segment, and the first opening of the attitude sensor interface is connected to the first chamber through a flow path located within the base.

8. The damping device according to any one of claims 1-3, characterized in that, The central axes of the low-voltage energy storage interface and the external interface are substantially coincident.

9. The damping device according to claim 8, characterized in that, The base also includes a pressure sensor interface, which is directly connected to the second chamber.

10. The damping device according to claim 9, characterized in that, The central axis of the pressure sensor interface is substantially coincident with the central axis of the solenoid valve mounting base, and is substantially perpendicular to the central axis of the low-pressure accumulator interface.

11. The damping device according to any one of claims 1-3, characterized in that, The bidirectional adjustable solenoid valve is configured to be fixed relative to the solenoid valve receiving cavity. The outer periphery of the piston structure includes at least two circumferentially extending grooves, which are separated from each other in the axial direction along the bidirectional adjustable solenoid valve. The damping device also includes at least two annular sealing rings, which are respectively disposed in the at least two grooves to seal the gap between the piston structure and the inner wall of the solenoid valve receiving cavity.

12. A suspension system comprising a damping device and a shock absorber according to any one of claims 1-11, wherein the oil port of the shock absorber is connected to the external interface of the damping device via an oil pipe.

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