Pressure retaining valve and vehicle

Abstract

The utility model discloses a pressure retaining valve and a vehicle. The pressure retaining valve comprises a valve seat, a valve cover, a valve body and a valve plate assembly, the valve cover is provided with a first airflow port; the valve seat is provided with a second airflow port; the valve seat is connected to one side of the valve body, and the valve cover is connected to the other side of the valve body; the valve plate assembly is installed in the valve body, the gas pressure of one of the first gas flow opening and the second gas flow opening is suitable for acting on the valve plate assembly, so that the valve plate assembly deforms to form a flow passing gap, and gas communicates with the other gas flow opening through the flow passing gap; a containing cavity is formed in one side of the valve body, an opening which is open towards the valve seat is formed in the containing cavity, the valve plate assembly is installed at the containing cavity, and a pressing ring for limiting and pre-tightening the valve plate assembly is arranged at the opening. According to the pressure retaining valve, two-way passive opening can be achieved, the valve plate assembly is installed in the containing cavity and installed with the pressing ring, the pressing ring is connected to the valve body and enables the valve plate assembly to abut against the valve body, and whether the valve plate assembly is installed in place or not can be conveniently determined according to installation of the pressing ring.

Description

Technical Field

[0001] This utility model relates to the field of vehicle technology, and in particular to a pressure holding valve and a vehicle. Background Technology

[0002] After the air spring shock absorber is installed on the vehicle body, as the vehicle travels on the road and the vehicle body height changes with the road surface, the air spring is vented or inflated to adjust the height of the shock absorber, thereby improving the driver's comfort and preventing the road surface from being damaged by wheel impacts.

[0003] Therefore, a pressure-holding valve is needed to regulate the gas pressure of the air spring. However, the pressure-holding valve in the existing technology is a one-way passive opening valve, and it is not convenient to check whether the valve plate assembly is installed in place, so there is room for improvement. Utility Model Content

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a pressure-holding valve, in which gas can flow from a first air outlet to a valve plate assembly, causing the valve plate assembly to deform and form a flow gap, thus flowing to a second air outlet. Alternatively, gas can flow from the second air outlet to the valve plate assembly, causing the valve plate assembly to deform and form a flow gap, thus flowing to the first air outlet. This achieves bidirectional passive opening of the pressure-holding valve, while a pressure ring constantly presses the valve plate assembly against the valve body, ensuring the valve body assembly is properly installed.

[0005] The pressure-holding valve according to an embodiment of the present invention includes: a valve seat, a valve cover, a valve body, and a valve plate assembly; the valve cover has a first airflow port, and the valve seat has a second airflow port; the valve seat is connected to one side of the valve body, and the valve cover is connected to the other side of the valve body; the valve plate assembly is installed in the valve body, and the gas pressure of one of the airflow ports, the first airflow port and the second airflow port, is adapted to act on the valve plate assembly, so that the valve plate assembly deforms to form a flow gap and the gas communicates with the other airflow port through the flow gap; wherein, a receiving cavity is provided on one side of the valve body, the receiving cavity has an open opening facing the valve seat, the valve plate assembly is installed in the receiving cavity, and a pressure ring for limiting and pre-tightening the valve plate assembly is provided at the open opening.

[0006] According to the pressure-holding valve of this utility model embodiment, gas can flow from the second air outlet to the valve plate assembly to squeeze and deform the valve plate assembly to form a flow gap, so that the gas can flow from the second air outlet through the flow gap to the first air outlet, and the gas can also flow from the first air outlet to the valve plate assembly to squeeze and deform the valve plate assembly to form a flow gap, and can flow from the first air outlet to the second air outlet, thereby forming a bidirectional passive opening of the pressure-holding valve; moreover, by installing the valve plate assembly into the receiving cavity and installing it with the pressure ring, and the pressure ring being connected to the valve body and pressing the valve plate assembly against the valve body, it can be ensured that the valve plate assembly is installed in place, that is, it is convenient to determine whether the valve plate assembly is installed in place based on the installation of the pressure ring.

[0007] According to an embodiment of the present invention, the pressure-holding valve has a first stepped portion on the inner periphery of the receiving cavity. The valve plate assembly includes an elastic valve plate and an elastic element. The pressure ring is connected to the elastic valve plate and presses the elastic valve plate against the first stepped portion along the axial direction. One end of the elastic element presses against the side of the elastic valve plate away from the valve seat, and the other end is connected to the valve body.

[0008] According to the pressure-holding valve of this utility model embodiment, one of the pressure ring and the elastic valve plate is provided with a limiting protrusion and the other is provided with a limiting groove, and the limiting protrusion and the limiting groove are engaged in an axial manner.

[0009] According to an embodiment of the present invention, the pressure-holding valve has an inner cavity and an outer cavity. The outer cavity surrounds the outer periphery of the inner cavity and communicates with the first airflow port. The inner cavity communicates with the second airflow port. The outer diameter of the elastic valve plate is larger than the inner diameter of the inner cavity. The elastic valve plate is adapted to block the inner cavity. Gas can press against the elastic valve plate along the inner cavity or the outer cavity to deform the elastic valve plate and form the flow gap to communicate between the inner cavity and the outer cavity.

[0010] According to the pressure-holding valve of this utility model embodiment, the inner cavity is provided with a pressure-blocking protrusion at one end facing the elastic valve plate, the elastic valve plate is adapted to press against the pressure-blocking protrusion, and separates from the pressure-blocking protrusion to form the flow gap when deformed.

[0011] According to an embodiment of the present invention, the pressure-holding valve has a communicating channel extending along the distribution direction of the valve cover, the valve body and the valve seat, and the communicating channel connects the first airflow port and the outer cavity.

[0012] According to the pressure-holding valve of this utility model embodiment, the receiving cavity is further provided with a second step portion, the second step portion and the first step portion are distributed axially, and the first step portion is closer to the central axis of the receiving cavity than the second step portion, and at least a portion of the valve seat is connected to the receiving cavity and abuts against the second step portion.

[0013] According to an embodiment of the present invention, the pressure-holding valve assembly further includes a pressure cap, the pressure cap having a guide groove that is open away from the elastic valve plate, one end of the elastic element being connected to the valve body and the other end being connected to the guide groove, and the pressure cap pressing against the side of the elastic valve plate away from the valve seat.

[0014] According to the pressure-holding valve of this utility model embodiment, the receiving cavity is further provided with a third step portion. The third step portion is located at the end of the receiving cavity away from the valve seat, and the third step portion is closer to the central axis of the receiving cavity relative to the first step portion. When the elastic valve plate is deformed by pressure, the pressure cover moves axially to squeeze the elastic element and is adapted to press and limit the third step portion.

[0015] According to the pressure-holding valve of this utility model embodiment, the valve body is further provided with a pressure balance hole, which is in communication with the interior of the receiving cavity.

[0016] According to an embodiment of the present invention, the pressure-holding valve has a threaded section at one end of the valve cover away from the valve body. The threaded section is used to connect an air spring, and the first airflow port is adapted to communicate with the interior of the air spring.

[0017] According to an embodiment of the present invention, the pressure-holding valve body is made of a light-transmitting material.

[0018] According to the pressure-holding valve of this utility model embodiment, the valve cover, the valve body, and the valve seat are all made of injection molded parts.

[0019] This utility model embodiment also proposes a vehicle, including an air spring and the aforementioned pressure holding valve, wherein the first airflow port of the pressure holding valve is connected to the interior of the air spring.

[0020] The vehicle's air springs and pressure-holding valve work together to allow the internal gas pressure of the air springs to be adjusted and changed at any time to meet the height adjustment requirements of different road sections.

[0021] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0022] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0023] Figure 1 This is a schematic diagram of the external structure of the pressure-holding valve according to an embodiment of the present invention. Figure 1 ;

[0024] Figure 2 This is a three-dimensional structural schematic diagram of the pressure-holding valve according to an embodiment of the present utility model;

[0025] Figure 3 This is a schematic diagram of the external structure of the pressure-holding valve according to an embodiment of the present invention. Figure 2 ;

[0026] Figure 4 This is an embodiment of the present utility model. Figure 1 A cross-sectional view along the AA direction when the flexible valve disc is in contact with the valve seat;

[0027] Figure 5 This is an embodiment of the present utility model. Figure 3 A cross-sectional view along the BB direction showing the separation of the resilient valve disc from the valve seat;

[0028] Figure 6 This is a schematic diagram of the sealing ring according to an embodiment of the present utility model;

[0029] Figure 7 This is a front view of the valve cover according to an embodiment of the present utility model;

[0030] Figure 8 This is the valve cover of this utility model embodiment. Figure 7 A schematic diagram of the structure in the CC direction;

[0031] Figure 9 This is a three-dimensional structural diagram of the valve cover according to an embodiment of the present utility model;

[0032] Figure 10 This is a schematic diagram of the structure of the elastic element according to an embodiment of the present utility model;

[0033] Figure 11 This is a schematic diagram of the structure of the pressure cap according to an embodiment of the present utility model;

[0034] Figure 12 This is a three-dimensional schematic diagram of the pressure cap according to an embodiment of the present utility model;

[0035] Figure 13 This is a cross-sectional schematic diagram of the elastic valve plate according to an embodiment of the present utility model;

[0036] Figure 14 This is a three-dimensional structural schematic diagram of the elastic valve plate according to an embodiment of the present utility model;

[0037] Figure 15 This is a cross-sectional schematic diagram of the pressure ring according to an embodiment of the present utility model;

[0038] Figure 16 This is a three-dimensional structural diagram of the pressure ring according to an embodiment of the present utility model;

[0039] Figure 17This is a schematic diagram of the external structure of the valve body according to an embodiment of the present utility model;

[0040] Figure 18 This is an embodiment of the present utility model. Figure 17 A cross-sectional view along the DD direction;

[0041] Figure 19 This is a three-dimensional structural diagram of the valve body according to an embodiment of the present utility model;

[0042] Figure 20 This is a top view of the valve seat according to an embodiment of the present utility model;

[0043] Figure 21 This is a cross-sectional view of the valve seat in the EE direction according to an embodiment of the present utility model;

[0044] Figure 22 This is a three-dimensional structural diagram of the valve seat according to an embodiment of the present utility model.

[0045] Figure label:

[0046] Pressure holding valve 100,

[0047] Valve body 1, receiving cavity 11, first groove 111, first step 1111, second groove 112, second step 1121, third groove 113, third step 1131, fourth groove 114, connecting channel 12, air pressure balance hole 13, valve cover mounting groove 14, valve cover 2, first air outlet 21, first air outlet cavity 22, threaded section 23, sealing ring 24, mounting plane 25, sealing ring mounting part 26, first section 2 7, second section 28, third section 29, valve seat 3, second air outlet 31, sealing element receiving groove 311, inner cavity 32, pressing protrusion 321, internal thread structure 322, outer cavity 33, first side 34, second side 35, valve plate assembly 4, elastic valve plate 41, limiting groove 411, gland 42, guide groove 421, upper end face 422, lower end face 423, elastic element 43, pressure ring 5, limiting protrusion 51, flow gap 6. Detailed Implementation

[0048] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0049] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0050] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0051] The following is for reference. Figures 1-22 According to the description of the pressure-holding valve 100 of this utility model embodiment, gas can flow from the second air outlet 31 to the valve plate assembly 4 to squeeze and deform the valve plate assembly 4 to form a flow gap 6, so that the gas can flow from the second air outlet 31 to the first air outlet 21, and the gas can also flow from the first air outlet 21 to the valve plate assembly 4 to squeeze and deform the valve plate assembly 4 to form a flow gap 6, and can also flow from the first air outlet 21 to the second air outlet 31, thereby forming a bidirectional passive opening of the pressure-holding valve 100; moreover, after the valve plate assembly 4 is installed in the receiving cavity 11, the pressure ring 5 is connected to the valve plate assembly 4. The pressure ring 5 can be connected to the valve body 1 and press the valve plate assembly 4 against the valve body 1, which can ensure that the valve plate assembly 4 is installed in place, that is, it is convenient to determine whether the valve plate assembly 4 is installed in place based on the installation of the pressure ring 5.

[0052] like Figure 1-22 As shown, a pressure-holding valve 100 according to an embodiment of the present invention includes: a valve seat 3, a valve cover 2, a valve body 1, and a valve plate assembly 4.

[0053] The valve cover 2 is provided with a first airflow port 21, and the valve seat 3 is provided with a second airflow port 31. The valve seat 3 is connected to one side of the valve body 1, and the valve cover 2 is connected to the other side of the valve body 1. The valve plate assembly 4 is installed in the valve body 1. The gas pressure of one of the airflow ports 21 and 31 is suitable for acting on the valve plate assembly 4, so that the valve plate assembly 4 deforms to form a flow gap 6 and the gas communicates with the other airflow port through the flow gap 6. The valve body 1 is provided with a receiving cavity 11 on one side. The receiving cavity 11 is provided with an open opening facing the valve seat 3. The valve plate assembly 4 is installed in the receiving cavity 11. A pressure ring 5 is provided at the open opening to limit and pre-tighten the valve plate assembly 4.

[0054] In practice, the valve cover 2 has a first airflow chamber 22 inside, which is connected to the first airflow port 21. When the valve plate assembly 4 deforms, a flow gap 6 is formed between the valve body 1 and the valve seat 3. The flow gap 6 connects the first airflow chamber 22 and the second airflow port 31, that is, it connects the first airflow port 21 and the second airflow port 31. The second airflow port 31 of the valve body 1 can be connected to a gas pipeline. The end of the valve cover 2 away from the valve body 1 is used to connect an air spring, so that when the pressure in the air spring is low, air is injected along the second airflow port 31, causing the valve plate assembly 4 to deform. Furthermore, the first air outlet 21 and the second air outlet 31 are connected through the flow gap 6, allowing gas to flow along the second air outlet 31 toward the first air outlet 22 and thus inflate the air spring. When the pressure inside the air spring is high, the gas flows from the first air outlet 21 to the valve plate assembly 4, causing the valve plate assembly 4 to deform. This allows the gas inside the air spring to be discharged from the first air outlet 21 along the first air outlet 22 through the flow gap 6 toward the second air outlet 31, balancing the pressure inside the air spring. As a result, the vehicle height can be adjusted according to road conditions when the vehicle is traveling on different road sections.

[0055] In this embodiment of the invention, the valve plate assembly 4 can be installed in the receiving cavity 11, and the pressure ring 5 is connected to the side of the valve plate assembly 4 near the valve seat 3. At the same time, the pressure ring 5 is fixedly connected to the valve body 1, and the valve plate assembly 4 is pressed against the valve body 1. In this way, the position of the pressure ring 5 can be kept unchanged, so that the pressure ring 5 always presses against the surrounding area of ​​the valve plate assembly 4. The gas only pushes the valve plate assembly 4 to deform other positions outside the connection position with the pressure ring 5. Therefore, when the pressure ring 5 is connected in the receiving cavity 11 and presses against the valve plate assembly 4, it can be said that the valve plate assembly 4 is installed in place.

[0056] Therefore, the pressure holding valve 100 of this utility model embodiment can achieve bidirectional passive opening, and it is convenient to determine whether the valve plate assembly 4 is installed in place based on the installation of the pressure ring 5.

[0057] In some embodiments, the inner periphery of the receiving cavity 11 is provided with a first step portion 1111, the valve plate assembly 4 includes an elastic valve plate 41 and an elastic element 43, the pressure ring 5 is connected to the elastic valve plate 41 and presses the elastic valve plate 41 against the first step portion 1111 in the axial direction, one end of the elastic element 43 presses against the side of the elastic valve plate 41 away from the valve seat 3, and the other end is connected to the valve body 1.

[0058] Combination Figure 3 , Figure 4 and Figure 18 As shown, the receiving cavity 11 has a first groove 111, a third groove 113, and a fourth groove 114 distributed axially on the side opposite to the valve seat 3. The valve plate assembly 4 is mainly installed in the first groove 111, the third groove 113, and the fourth groove 114. The inner diameter of the first groove 111 is larger than the inner diameter of the third groove 113, thus forming a first step portion 1111 between the first groove 111 and the third groove 113. The pressure ring 5 is connected to the inner wall of the receiving cavity 11. The wall is formed by the pressure ring 5 and the elastic valve plate 41. The elastic valve plate 41 can be a rubber valve plate. The pressure ring 5 presses the edge of the elastic valve plate 41 against the first step 1111. At this time, the elastic valve plate 41 cannot move axially. When the gas flows from the first gas flow port 21 to the elastic valve plate 41 and presses against the elastic valve plate 41, the elastic valve plate 41 remains stable at the position where the pressure ring 5 presses against it. However, the area of ​​the elastic valve plate 41 outside the position where the pressure ring 5 presses against it can deform under the pressure of the gas.

[0059] In other words, the pressure ring 5 is connected to the elastic valve plate 41, and the elastic valve plate 41 abuts against the elastic element 43. The pressure ring 5 is laser-welded to the inner wall of the receiving cavity 11 after interference fit. When the elastic valve plate 41 is pressed against the first step 1111, it can be ensured that the pressure ring 5 connects the elastic valve plate 41 in place. It is convenient to determine whether the elastic valve plate 41 is installed in place according to the first step 1111. If the elastic valve plate 41 is pressed against the first step 1111, it can be determined that the elastic valve plate 41 is installed in place. The overall structure is simple and reliable to assemble.

[0060] In some embodiments, one of the pressure ring 5 and the elastic valve plate 41 is provided with a limiting protrusion 51 and the other is provided with a limiting groove 411, and the limiting protrusion 51 and the limiting groove 411 are engaged in an axial engagement.

[0061] Specifically, in combination Figure 13 and Figure 15As shown, if the pressure ring 5 is provided with a limiting protrusion 51, and the side of the elastic valve plate 41 connected to the pressure ring 5 is provided with a limiting groove 411, the limiting protrusion 51 and the limiting groove 411 are engaged in a snap-fit ​​manner, making the connection convenient. After the pressure ring 5 is welded and fixed to the inner wall of the receiving cavity 11, one edge of the elastic valve plate 41 abuts against the position of the first step portion 1111, thereby facilitating the installation of the elastic valve plate 41 and making it easy to determine whether the elastic valve plate 41 is installed in place. Of course, a limiting protrusion 51 can also be provided on the side of the elastic valve plate 41 facing the pressure ring 5, and the pressure ring 5 can be provided with a limiting groove 411, then the elastic valve plate 41 and the pressure ring 5 can also achieve a snap-fit ​​engagement.

[0062] In some embodiments, the valve seat 3 is provided with an inner cavity 32 and an outer cavity 33. The outer cavity 33 surrounds the outer periphery of the inner cavity 32 and is connected to the first airflow port 21. The inner cavity 32 is connected to the second airflow port 31. The outer diameter of the elastic valve plate 41 is larger than the inner diameter of the inner cavity 32. The elastic valve plate 41 is adapted to block the inner cavity 32, and the gas can press against the elastic valve plate 41 along the inner cavity 32 or the outer cavity 33 to deform the elastic valve plate 41 and form a flow gap 6 to connect the inner cavity 32 and the outer cavity 33.

[0063] Combination Figure 4 and Figure 5 As shown, the inner cavity 32 of the valve seat 3 is located in the middle of the valve seat 3, and the outer cavity 33 surrounds the inner cavity 32. When the elastic valve plate 41 blocks the inner cavity 32, the connection between the inner cavity 32 and the outer cavity 33 is blocked. Then, when gas flows into the inner cavity 32 from the second gas flow port 31, and the gas pressure is greater than the elastic force of the elastic element 43 and the elastic valve plate 41, the elastic valve plate 41 can be pushed to deform, thereby opening the inner cavity 32, forming a flow gap 6 and connecting the inner cavity 32 and the outer cavity 33. That is, the elastic valve plate 41 can open the inner cavity 32 from the outer cavity 33. Figure 4 The state of the blocked inner cavity 32 changes to Figure 5 When the inner cavity 32 is open, the second air outlet 31 and the first air outlet 21 are connected, making it easier to fill the air spring with gas from the second air outlet 31. Moreover, the elastic valve plate 41 is provided so that the cavity formed by the elastic valve plate 41 on the side away from the valve seat 3 in the receiving cavity 11 is airtightly isolated from the outer cavity 33 of the valve seat 3. When the elastic valve plate 41 contacts the pressure protrusion 321 to block the gas from communicating between the outer cavity 33 and the inner cavity 32, the gas pressure can press the elastic valve plate 41 to deform when the gas pressure increases again.

[0064] When the pressure inside the air spring is high and venting is required, gas flows from the air spring to... Figure 4At the first airflow port 21, the gas flows from the first airflow port 21 into the first airflow chamber 22, and then from the first airflow chamber 22 along the valve body 1 to the outer cavity 33 of the valve seat 3. When the pressure of the gas in the outer cavity 33 is relatively large and pushes the elastic valve plate 41 and the elastic element 43 to deform, a flow gap 6 can also be formed between the elastic valve plate 41 and the valve seat 3, thereby realizing that the gas flows from the outer cavity 33 of the valve seat 3 to the inner cavity 32 and is discharged from the inner cavity 32.

[0065] In other words, when gas flows from the inner cavity 32 to the flow gap 6 and then to the outer cavity 33, it presses the middle part of the elastic valve plate 41 until it deforms. Conversely, when gas flows from the outer cavity 33 to the flow gap 6 and then to the inner cavity 32, the gas flows from the outer cavity 33 towards... Figure 4 The upper part of the elastic valve plate 41 is pressed against the position near the pressure ring 5 until it deforms, that is, at the position where the elastic valve plate 41 is pressed against the pressure ring 5. Figure 4 At the outer cavity 33, the elastic valve plate 41 is pushed upward and squeezed until deformed, thereby forming the flow gap 6.

[0066] Therefore, gas can flow when the air spring needs to be inflated or deflated. That is, gas can flow from the first air outlet 21 to the elastic valve plate 41, press and deform the elastic valve plate 41, and then flow through the flow gap 6 to the second air outlet 31. Alternatively, gas can flow from the second air outlet 31 to the elastic valve plate 41, press and deform the elastic valve plate 41 to form the flow gap 6, and allow gas to flow from the flow gap 6 to the first air outlet 21. However, it should be noted that in both cases, the elastic valve plate 41 is pushed to deform in a direction away from the valve seat 3 to form the flow gap 6.

[0067] In some embodiments, the inner cavity 32 is provided with a pressing protrusion 321 at one end facing the elastic valve plate 41. The elastic valve plate 41 is adapted to press against the pressing protrusion 321 and separate from the pressing protrusion 321 to form a flow gap 6 when deformed.

[0068] Combination Figure 4 As shown, the end of the pressure protrusion 321 facing the elastic valve plate 41 can be constructed in an arc shape, thereby preventing wear of the elastic valve plate 41 when it presses against the pressure protrusion 321. Simultaneously, the pressure protrusion 321 is positioned around the inner cavity 32. When the elastic valve plate 41 contacts the pressure protrusion 321, it improves the sealing effect of the elastic valve plate 41 against the pressure protrusion 321 on the inner cavity 32. Furthermore, the arc-shaped pressure protrusion 321 also improves the fit between the elastic valve plate 41 and the pressure protrusion 321. That is, when the elastic valve plate 41 deforms, it separates from the pressure protrusion 321, forming a flow gap 6, facilitating the flow of gas from the inner cavity 32 of the valve seat 3 to the outer cavity 33, or from the outer cavity 33 to the inner cavity 32.

[0069] In some embodiments, the valve body 1 is provided with a communication channel 12 extending along the distribution direction of the valve cover 2, the valve body 1 and the valve seat 3, and the communication channel 12 connects the first air outlet 21 and the outer cavity 33.

[0070] Specifically, refer to Figure 18 As shown, the connecting channel 12 extends along the axial direction of the valve body 1 and connects the first airflow chamber 22 and the outer cavity 33 of the valve seat 3, thereby realizing the connection between the first airflow port 21 and the second airflow port 31 when the elastic valve plate 41 is squeezed and deformed and has a flow gap 6.

[0071] like Figure 19 As shown, multiple connecting channels 12 can be configured, and these multiple connecting channels 12 are distributed at intervals along the circumference of the valve body 1. For example, two, three, or four connecting channels 12 can be configured, thereby ensuring that the outer cavity 33 of the valve seat 3 is effectively connected to the gas in the first airflow cavity 22. When the gas of the air spring is exhausted towards the first airflow cavity 22, the gas can be quickly discharged to the outer cavity 33 of the valve seat 3. Furthermore, when there is a flow gap 6, the gas can quickly flow through the outer cavity 33 to the inner cavity 32 of the valve seat 3 and then flow out.

[0072] Alternatively, when the air spring needs to be inflated, it is inflated through the inner cavity 32 of the valve seat 3. When the elastic valve plate 41 is deformed, the gas in the inner cavity 32 flows through the flow gap 6 to the outer cavity 33 of the valve seat 3. The gas can quickly flow from the outer cavity 33 to the first airflow cavity 22 through multiple connecting channels 12, thereby achieving rapid and effective gas flow.

[0073] In some embodiments, the receiving cavity 11 is further provided with a second step portion 1121, the second step portion 1121 and the first step portion 1111 are distributed axially, and the first step portion 1111 is closer to the central axis of the receiving cavity 11 than the second step portion 1121. At least a portion of the valve seat 3 is connected to the receiving cavity 11 and is pressed against and fixedly connected to the second step portion 1121.

[0074] That is, reference Figure 4 , Figure 18 and Figure 21 As shown, the second step portion 1121 is located near the valve seat 3. Figure 21 In the valve seat 3, the sides include a first side 34 and a second side 35 that are continuous along the axial direction. Both the second side 35 and the first side 34 of the valve seat 3 are arranged around the outer cavity 33, and the second side 35 is closer to the center of the inner cavity 32. Figure 18In the cavity 11, a second groove 112 is provided on the side facing the valve seat 3. The inner diameter of the second groove 112 is larger than the inner diameter of the first groove 111, thus forming a second step 1121 between the first groove 111 and the second groove 112. A portion of the valve seat 3 can extend into the second groove 112 and press against the side wall of the second groove 112 and the second step 1121. The second side 35 of the valve seat 3 is closer to the center of the inner cavity 32, which facilitates the valve seat 3 to quickly extend into the second groove 112. The outer periphery of the portion of the valve seat 3 that extends into the second groove 112 is press-fitted with the inner wall of the second groove 112 and laser-welded to seal, thereby improving the reliability of the connection between the valve seat 3 and the valve body 1.

[0075] In some embodiments, the valve plate assembly 4 further includes a pressure cap 42, which has a guide groove 421 that is open away from the elastic valve plate 41. One end of the elastic member 43 is connected to the valve body 1 and the other end is connected to the guide groove 421. The pressure cap 42 presses against the side of the elastic valve plate 41 that is away from the valve seat 3.

[0076] Continue to combine Figure 4 , Figure 5 and Figure 11 As shown, the pressure cap 42 is cylindrical with an open opening. The interior of the pressure cap 42 has a guide groove 421. The upper end of the open opening of the pressure cap 42 is the upper end face 422, and the bottom is the lower end face 423. The lower end face 423 of the pressure cap 42 presses against the elastic valve plate 41. The elastic element 43 is a spring. One end of the elastic element 43 is connected to the interior of the guide groove 421, and the other end is connected to the end of the receiving cavity 11 away from the valve seat 3. When the pressure of the air spring is balanced, the elastic valve plate 41 is in contact with the pressing protrusion 321 of the valve seat 3. At this time, the elastic element 43 is in its natural state. When air is pumped into the air spring or when the gas pressure inside the air spring is high and needs to be discharged towards the second air outlet 31, the gas can push the elastic valve... The plate 41 is deformed by pressing, so that the elastic valve plate 41 squeezes the cover 42 and the elastic element 43. Then the cover 42 can move towards the inside of the receiving cavity 11, and the elastic element 43 is squeezed. When the pressure of the air spring is kept in equilibrium and there is no need to inflate or vent, the elastic element 43 returns to its original position, so that the elastic valve plate 41 contacts the pressing protrusion 321 of the valve seat 3. That is, whether the air spring is being inflated or the air in the air spring is being vented and the gas pressure is large, such as when the gas pressure is greater than the elastic force of the elastic element 43 and the elastic valve plate 41, the elastic valve plate 41 and the elastic element 43 can be squeezed, thereby deforming the elastic valve plate 41. The elastic valve plate 41 separates from the pressing protrusion 321 of the valve seat 3 to form the flow gap 6.

[0077] Therefore, by setting the pressure cap 42, it is easy to connect the elastic element 43 so that when the elastic valve plate 41 squeezes the pressure cap 42, the pressure cap 42 moves upward, thereby guiding the pressure cap 42 to squeeze the elastic element 43. Thus, when inflation or deflation is not required, the elastic force of the elastic element 43 makes the elastic valve plate 41 contact the pressure protrusion 321.

[0078] In some embodiments, the receiving cavity 11 is further provided with a third step portion 1131, which is located at the end of the receiving cavity 11 away from the valve seat 3, and the third step portion 1131 is close to the central axis of the receiving cavity 11 relative to the first step portion 1111. When the elastic valve plate 41 is deformed by pressure, the pressure cap 42 moves axially to squeeze the elastic member 43 and is adapted to press and limit the third step portion 1131.

[0079] Combination Figure 18 As shown, the receiving cavity 11 includes a third groove 113 and a fourth groove 114, which are continuously distributed along the axial direction. The inner diameter of the third groove 113 is larger than the inner diameter of the fourth groove 114, so that a third step 1131 is formed between the third groove 113 and the fourth groove 114. One end of the elastic element 43 is connected to the fourth groove 114 and the other end is connected to the guide groove 421 of the pressure cap 42. When the gas pressure is high and the elastic valve plate 41 is squeezed and deformed, the elastic valve plate 41 pushes the pressure cap 42 to move upward, and the pressure cap 42 moves and compresses. When the pressure cap 42 moves upward to its maximum position, the upper end face 422 of the pressure cap 42 can press against the third step portion 1131, thereby limiting the movement of the pressure cap 42. This ensures that there is sufficient flow gap 6 between the elastic valve plate 41 and the valve seat 3 to allow the inner cavity 32 and the outer cavity 33 to communicate. When the pressure in the air spring is balanced and inflation or deflation is not required, the elastic force of the elastic element 43 causes the pressure cap 42 to press against the elastic valve plate 41, so that the elastic valve plate 41 presses against the pressing protrusion 321 of the valve seat 3, thereby blocking the communication between the inner cavity 32 and the outer cavity 33.

[0080] In other words, the axial movement distance of the pressure cap 42 and the compression distance of the elastic element 43 are limited by the pressure cap 42 and the third step portion 1131, which facilitates the rapid reset of the elastic element 43.

[0081] In some embodiments, the valve body 1 is further provided with a pressure balance hole 13, which communicates with the interior of the receiving cavity 11.

[0082] In practice, the air pressure balance hole 13 extends radially along the valve body 1. The air pressure balance hole 13 keeps the receiving cavity 11 of the pressure holding valve 100 connected to the outside, avoiding the formation of back pressure in the receiving cavity 11, which would affect the deformation of the elastic valve plate 41 and make it difficult to drive the pressure cap 42 to move, thereby affecting the force of the compression elastic element 43 and making it difficult to form the flow gap 6. Thus, the pressure in the third groove 113 and the fourth groove 114 of the receiving cavity 11 can be released through the air pressure balance hole 13.

[0083] In some embodiments, the valve cover 2 is provided with a threaded section 23 at the end away from the valve body 1. The threaded section 23 is used to connect the air spring, and the first air outlet 21 is adapted to communicate with the interior of the air spring.

[0084] Combination Figure 4 and Figure 8 As shown, the valve cover 2 has a threaded section 23 at the end away from the valve body 1. One end of the air spring is fitted onto the threaded section 23 and threadedly connected to the threaded section 23, which makes it convenient to install the valve cover 2 and the air spring, and makes it easier to connect the entire pressure holding valve 100 to the air spring.

[0085] In addition, continue to refer to Figure 8 As shown, the valve cover 2 has a first section 27, a second section 28, and a third section 29 that are continuous along the axial direction and have progressively increasing outer diameters. The upper part of the first section 27 is a threaded section 23, and the lower part of the first section 27 is a sealing ring mounting part 26. The sealing ring 24 is fitted onto the sealing ring mounting part 26 and presses against the upper end of the second section 28. When the air spring is threadedly connected to the threaded section 23, the air spring and the sealing ring 24 are squeezed together. The squeezing method can be axial squeezing or one end of the air spring can be fitted onto the outside of the sealing ring 24 to squeeze the sealing ring 24, thereby improving the sealing performance when the valve cover 2 is connected to the air spring.

[0086] In some embodiments, the valve body 1 is made of a light-transmitting material. For example, the valve cover 2 and valve seat 3 can be made of opaque material, while the valve body 1 is made of a light-transmitting material. In this way, the elastic valve plate 41 installed in the receiving cavity 11 of the valve body 1, as well as the valve cover 2, elastic element 43, etc., can be easily observed in terms of their installation position and whether the installation is in place. Alternatively, when the elastic valve plate 41 is damaged, it can be clearly and intuitively observed.

[0087] In some embodiments, the valve cover 2, valve body 1, and valve seat 3 are all made of injection molded parts. Injection molding is a faster process, and these parts are typically plastic injection molded parts. They are plastic products obtained by injecting molten plastic material into a mold cavity through an injection molding process, followed by cooling and solidification. Injection molding involves heating and melting granular or powdered plastic raw materials, injecting them into a mold cavity through an injection molding machine, and then cooling and solidifying them to obtain the desired plastic part. Compared to metal parts, the impact force and thermal effects of the pressure protrusion 321 on the elastic valve plate 41 during the collision between the elastic valve plate 41 and the pressure protrusion 321 are more effectively reduced, ensuring the long-term accuracy and lifespan of the pressure-holding valve 100.

[0088] Additionally, it should be noted that the inner cavity 32 of the valve seat 3 is provided with an internal thread structure 322, which can be used for threaded connection of the gas pipeline; the end of the internal thread structure 322 away from the valve body 1 is also provided with a sealing element receiving groove 311, which is used to install the sealing element, so that after the gas pipeline is threadedly connected to the internal thread structure 322, the sealing connection between the gas pipeline and the valve seat 3 can be maintained.

[0089] Furthermore, the valve body 1 is provided with a valve cover mounting groove 14 at the end facing the valve cover 2, which can be used to install the valve cover 2. Figure 8 In the middle, an assembly plane 25 is formed between the second section 28 and the third section 29 of the valve cover 2. After the third section 29 of the valve cover 2 extends into the valve cover mounting groove 14 and is welded to the valve cover mounting groove 14, the assembly plane 25 of the valve cover 2 is flush with the top surface of the valve body 1.

[0090] This utility model embodiment also discloses a vehicle, including an air spring and the aforementioned pressure holding valve 100, wherein the first airflow port 21 of the pressure holding valve 100 is connected to the interior of the air spring.

[0091] In other words, gas can flow from the second air outlet 31 to the valve plate assembly 4 to compress and deform the valve plate assembly 4 to form a flow gap 6, allowing gas to flow from the second air outlet 31 to the first air outlet 21, and gas can also flow from the first air outlet 21 to the valve plate assembly 4 to compress and deform the valve plate assembly 4 to form a flow gap 6, and can flow from the first air outlet 21 to the second air outlet 31, thereby forming a bidirectional passive opening of the pressure holding valve 100; moreover, after the valve plate assembly 4 is installed in the receiving cavity 11, the pressure ring 5 is then installed. The pressure ring 5 can be connected to the valve body 1 and press the valve plate assembly 4 against the valve body 1, which can ensure that the valve plate assembly 4 is installed in place. That is, it is convenient to determine whether the valve plate assembly 4 is installed in place based on the installation of the pressure ring 5, so that the pressure holding valve 100 and the air spring cooperate, and the gas pressure inside the air spring can be adjusted and changed at any time to adapt to the height adjustment requirements of the vehicle's shock absorber on different road sections.

[0092] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0093] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A pressure-holding valve, characterized in that, include: A valve seat (3) and a valve cover (2), wherein the valve cover (2) is provided with a first airflow port (21) and the valve seat (3) is provided with a second airflow port (31); Valve body (1), valve seat (3) is connected to one side of valve body (1), and valve cover (2) is connected to the other side of valve body (1); A valve plate assembly (4) is installed inside the valve body (1). The gas pressure of one of the first air outlet (21) and the second air outlet (31) is adapted to act on the valve plate assembly (4) so ​​that the valve plate assembly (4) deforms to form a flow gap (6) and the gas communicates with the other air outlet through the flow gap (6). The valve body (1) has a receiving cavity (11) on one side, the receiving cavity (11) has an opening that opens toward the valve seat (3), the valve plate assembly (4) is installed in the receiving cavity (11), and the opening has a pressure ring (5) for limiting and pre-tightening the valve plate assembly (4).

2. The pressure-holding valve according to claim 1, characterized in that, The inner periphery of the receiving cavity (11) is provided with a first step portion (1111). The valve plate assembly (4) includes an elastic valve plate (41) and an elastic element (43). The pressure ring (5) is connected to the elastic valve plate (41) and presses the elastic valve plate (41) against the first step portion (1111) axially. One end of the elastic element (43) presses against the side of the elastic valve plate (41) away from the valve seat (3), and the other end is connected to the valve body (1).

3. The pressure-holding valve according to claim 2, characterized in that, One of the pressure ring (5) and the elastic valve plate (41) is provided with a limiting protrusion (51) and the other is provided with a limiting groove (411). The limiting protrusion (51) and the limiting groove (411) are engaged in axial engagement.

4. The pressure-holding valve according to claim 2, characterized in that, The valve seat (3) is provided with an inner cavity (32) and an outer cavity (33). The outer cavity (33) surrounds the outer periphery of the inner cavity (32). The outer cavity (33) is connected to the first airflow port (21). The inner cavity (32) is connected to the second airflow port (31). The outer diameter of the elastic valve plate (41) is larger than the inner diameter of the inner cavity (32). The elastic valve plate (41) is adapted to block the inner cavity (32). Gas can press against the elastic valve plate (41) along the inner cavity (32) or the outer cavity (33) to deform the elastic valve plate (41) and form the flow gap (6) to connect the inner cavity (32) and the outer cavity (33).

5. The pressure-holding valve according to claim 4, characterized in that, The inner cavity (32) has a pressing protrusion (321) at one end facing the elastic valve plate (41). The elastic valve plate (41) is adapted to press against the pressing protrusion (321) and separate from the pressing protrusion (321) when deformed to form the flow gap (6).

6. The pressure-holding valve according to claim 4, characterized in that, The valve body (1) is provided with a connecting channel (12) extending along the distribution direction of the valve cover (2), the valve body (1) and the valve seat (3), and the connecting channel (12) connects the first air outlet (21) and the outer cavity (33).

7. The pressure-holding valve according to claim 2, characterized in that, The receiving cavity (11) is further provided with a second step portion (1121), the second step portion (1121) and the first step portion (1111) are distributed along the axial direction, and the first step portion (1111) is closer to the central axis of the receiving cavity (11) relative to the second step portion (1121). At least a portion of the valve seat (3) is connected to the receiving cavity (11) and abuts against the second step portion (1121).

8. The pressure-holding valve according to claim 2, characterized in that, The valve plate assembly (4) also includes a pressure cap (42), which has a guide groove (421) that is open away from the elastic valve plate (41). One end of the elastic element (43) is connected to the valve body (1) and the other end is connected to the guide groove (421). The pressure cap (42) presses against the side of the elastic valve plate (41) away from the valve seat (3).

9. The pressure-holding valve according to claim 8, characterized in that, The receiving cavity (11) is further provided with a third step (1131), which is located at the end of the receiving cavity (11) away from the valve seat (3) and is closer to the central axis of the receiving cavity (11) than the first step (1111). When the elastic valve plate (41) is deformed by pressure, the pressure cap (42) moves axially to squeeze the elastic member (43) and is adapted to press and limit the third step (1131).

10. The pressure-holding valve according to claim 1, characterized in that, The valve body (1) is also provided with a pressure balance hole (13), which is connected to the interior of the receiving cavity (11).

11. The pressure-holding valve according to claim 1, characterized in that, The valve cover (2) has a threaded section (23) at one end away from the valve body (1), the threaded section (23) is used to connect the air spring, and the first air outlet (21) is adapted to communicate with the interior of the air spring.

12. The pressure-holding valve according to claim 1, characterized in that, The valve body (1) is made of a light-transmitting material.

13. The pressure-holding valve according to claim 1, characterized in that, The valve cover (2), the valve body (1), and the valve seat (3) are all injection molded parts.

14. A vehicle, characterized in that, It includes an air spring and a pressure holding valve (100) as described in any one of claims 1-13, wherein the first airflow port (21) of the pressure holding valve (100) is in communication with the interior of the air spring.

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