Solenoid valve and air suspension system

Abstract

This invention discloses a solenoid valve and an air suspension system, comprising: a valve seat, a valve cover, and a valve core. The valve seat has a mounting groove at its bottom and a snap-fit ​​portion at a preset position. The valve cover includes a valve cover body and a valve nozzle mounted on the valve cover body, the valve nozzle corresponding to the mounting groove. The valve cover also includes a snap-fit ​​arm mounted on the valve cover body. The valve core includes a stationary valve core, a moving valve core, and an elastic element. The stationary valve core is mounted at the bottom of the mounting groove, the moving valve core is mounted at the opening of the mounting groove, and the elastic element is disposed between the stationary valve core and the moving valve core. When the stationary valve core is energized, it can attract the moving valve core and move it towards the stationary valve core, separating the moving valve core from the valve nozzle, thus opening the valve nozzle. When the stationary valve core is de-energized, the elastic element can push the moving valve core towards the valve nozzle and press it against the valve nozzle, closing the valve nozzle. When the valve cover is mounted on the bottom of the valve seat, the snap-fit ​​arm can engage with the snap-fit ​​portion, thereby achieving the effect of pre-fixing the valve cover and valve seat, facilitating the operator to remove the solenoid valve.

Description

Technical Field

[0001] This invention relates to the field of solenoid valves, and more particularly to solenoid valves and air suspension systems. Background Technology

[0002] A solenoid valve is an automatic valve that uses electricity to control the movement of a valve core to control the state of a fluid passage. As an electromagnetically controlled fluid actuator, solenoid valves are widely used in industrial automation, automotive, HVAC, smart home, medical, food, water treatment, and energy fields to achieve automatic on / off, reversal, and regulation of fluids such as gas, water, oil, steam, and refrigerants. They are an indispensable basic component in automation systems.

[0003] A solenoid valve consists of a solenoid coil, a valve core, and a spring. When the coil is energized, it generates an electromagnetic force that attracts the valve core, causing it to move and control the opening or closing of the fluid passage. When the power is off, the electromagnetic force disappears, and the spring pushes the valve core back to its original position, thus achieving the control of fluid flow. A sealing gasket is provided at one end of the valve core. When the sealing gasket is pressed against the outlet of the valve nozzle, the passage inside the valve nozzle is closed; when the sealing gasket is moved away from the outlet of the valve nozzle, the passage inside the valve nozzle is open.

[0004] Solenoid valves achieve state switching or control by controlling the movement of the valve core relative to the valve nozzle, which drives the sealing gasket. The stability of the relative positions of the internal components of a solenoid valve has a significant impact on its performance. In existing solenoid valves, the coil housing and the valve nozzle cover are typically fixed together with screws. During screw installation, screws in different positions are usually installed sequentially, making it difficult to maintain uniform force at different locations. This can cause misalignment of internal structures such as the valve core, affecting the accuracy of position control. In the existing solenoid valve structure, if the solenoid valve needs to be removed before the valve nozzle cover and coil housing are fixed with screws, the operator may easily cause the valve nozzle cover and coil housing to separate or become misaligned, leading to misalignment or loss of internal components. Conversely, if the valve is fixed with screws before removal and then the screws are removed after removal, the operation is too cumbersome, and repeated screw removal can affect the subsequent fixing effect. Summary of the Invention

[0005] To address the aforementioned technical problems, the present invention aims to provide a solenoid valve and an air suspension system in which, when the valve cover is installed at the bottom of the valve seat, the snap-fit ​​arm can snap into the snap-fit ​​part, thereby achieving the effect of pre-fixing the valve cover and the valve seat, so as to facilitate the operator to pick up the solenoid valve.

[0006] To achieve the above objectives, the present invention aims to provide a solenoid valve comprising:

[0007] The valve seat has a mounting groove at its bottom and a snap-fit ​​part at a preset position.

[0008] A valve cover, comprising a valve cover body and a valve nozzle mounted on the valve cover body, the valve cover being adapted to be mounted on the bottom of the valve seat, the valve nozzle corresponding to the mounting groove, the valve cover further comprising a snap-fit ​​arm mounted on the valve cover body, the snap-fit ​​arm being adapted to snap into the snap-fit ​​portion when the valve cover is mounted on the bottom of the valve seat;

[0009] The valve core is installed in the mounting groove. The valve core includes a stationary valve core, a moving valve core, and an elastic element. The stationary valve core is installed at the bottom of the mounting groove, and the moving valve core is installed at the opening of the mounting groove. The elastic element is disposed between the stationary valve core and the moving valve core. When the stationary valve core is energized, it can attract the moving valve core and move it closer to the stationary valve core, separating the moving valve core from the valve nozzle, and opening the valve nozzle. When the stationary valve core is de-energized, the elastic element can push the moving valve core towards the valve nozzle and press it against the valve nozzle, closing the valve nozzle.

[0010] In some embodiments, the valve seat includes a valve seat body and a snap-fit ​​block, the mounting groove is formed in the valve seat body, the snap-fit ​​block is mounted on one side of the valve seat body, and the snap-fit ​​block forms the snap-fit ​​portion;

[0011] The top of the snap-fit ​​block has a first snap-fit ​​surface, and one side of the snap-fit ​​block has a first inclined guide surface;

[0012] The top of the snap-fit ​​arm has a snap-fit ​​protrusion, one side of the snap-fit ​​protrusion has a second inclined guide surface, and the bottom of the snap-fit ​​protrusion has a second snap-fit ​​surface.

[0013] During the process of installing the valve cover onto the bottom of the valve seat, the first inclined guide surface first contacts the second inclined guide surface and pushes the snap-fit ​​arm to deform away from the snap-fit ​​block; after the snap-fit ​​block passes the snap-fit ​​protrusion, the snap-fit ​​arm moves towards the valve seat under the action of the elastic restoring force of the snap-fit ​​arm, and the first snap-fit ​​surface abuts against the second snap-fit ​​surface.

[0014] In some embodiments, there are multiple snap-fit ​​blocks and snap-fit ​​arms. When the valve cover is not installed on the valve seat, the snap-fit ​​arms are tilted at a preset angle toward the center of the valve cover body.

[0015] In some embodiments, the valve seat body has a clearance groove on the side corresponding to the snap-fit ​​block, which extends through the top and bottom of the valve seat body, and the snap-fit ​​block is disposed at the bottom of the clearance groove.

[0016] In some embodiments, the valve seat body has a threaded hole at a preset position that passes through the top and bottom of the valve seat body, the top of the valve seat body has a snap-fit ​​groove communicating with the threaded hole, the diameter of the snap-fit ​​groove is larger than the diameter of the threaded hole, and the top sidewall of the threaded hole forms the snap-fit ​​portion.

[0017] The top of the snap-fit ​​arm has a snap-fit ​​protrusion, one side of the snap-fit ​​protrusion has a second inclined guide surface, the bottom of the snap-fit ​​protrusion has a second snap-fit ​​surface, and there are multiple snap-fit ​​arms, which surround each other to form a threaded channel.

[0018] During the process of installing the valve cover onto the bottom of the valve seat, the snap-fit ​​arm is aligned with the bottom opening of the threaded hole, the valve seat body contacts the second inclined guide surface, and the multiple snap-fit ​​arms are pushed to deform and move closer to each other; when the snap-fit ​​protrusion enters the snap-fit ​​groove, the elastic arm returns to its original shape, and the second snap-fit ​​surface abuts against the top sidewall of the threaded hole.

[0019] In some embodiments, the valve seat further includes a sleeve, the sleeve including a first mounting section, a connecting section and a second mounting section, the first mounting section being mounted in the mounting groove and sleeved on the outside of the moving valve core and the stationary valve core, one end of the connecting section being connected to the first mounting section and the other end being connected to the second mounting section;

[0020] The valve cover body has an annular protrusion around the valve nozzle, and a fixing groove is formed around the annular protrusion. The second mounting section is installed in the fixing groove. A first sealing groove is formed between the connection between the second mounting section and the connecting section and the outer side of the annular protrusion. A first sealing ring is installed in the first sealing groove.

[0021] A second sealing groove is provided around the mounting groove at the bottom of the valve seat body. A second sealing ring is installed in the second sealing groove and abuts against the valve cover body.

[0022] In some embodiments, the valve nozzle includes a valve nozzle body and a pressure protrusion, the valve nozzle body having a pressure end and a connecting end, and the valve nozzle body having a first fluid passage penetrating the pressure end and the connecting end;

[0023] The abutting protrusion is installed on the abutting end, and the abutting protrusion surrounds to form a second fluid channel. The first fluid channel is connected to the second fluid channel. The diameter of the abutting protrusion is smaller than the diameter of the valve body, and the side of the abutting protrusion away from the valve body is an abutting plane. The abutting end is adapted to abut against the sealing gasket on the moving valve core.

[0024] In some embodiments, the outer peripheral side of the abutting protrusion is an abutting slope, the end of the abutting protrusion away from the valve body has a first diameter, and the end of the abutting protrusion close to the valve body has a second diameter, wherein the first diameter is smaller than the second diameter;

[0025] The connection between the sidewall of the second fluid channel and the abutting plane has a first rounded corner; the connection between the abutting slope and the abutting plane has a second rounded corner.

[0026] In the open state, gas is suitable to enter from the first fluid channel and the second fluid channel, pass through the channel between the abutting plane and the sealing gasket, and then exit through the gap between the abutting slope and the sealing gasket; in the closed state, the abutting plane abuts against the sealing gasket, the sealing gasket corresponding to the first rounded corner portion separates from the first rounded corner under the action of gas pressure, and the second rounded corner abuts against the sealing gasket.

[0027] In some embodiments, the bottom of the stationary valve core has an abutment protrusion, and a first groove is provided around the abutment protrusion; the top of the moving valve core has a second groove.

[0028] One end of the elastic element is installed in the first groove, and the other end is installed in the second groove. The elastic element has an axially opened through hole, and the abutment protrusion passes through the through hole.

[0029] When the stationary valve core is energized, it attracts the moving valve core and moves it a predetermined distance toward the stationary valve core. When the moving valve core separates from the valve nozzle, the abutting protrusion is adapted to enter the second groove.

[0030] In some embodiments, the movable valve core has a first exhaust channel axially arranged at a preset position, the first exhaust channel penetrating the top surface and bottom surface of the movable valve core; the top of the movable valve core has a first receiving groove, the bottom of the movable valve core has a second receiving groove, the first receiving groove is located at the bottom of the first groove, and the movable valve core further includes a first sealing gasket installed in the first receiving groove and a second sealing gasket installed in the second receiving groove;

[0031] The stationary valve core has a second exhaust channel arranged axially at a preset position. The second exhaust channel penetrates the top surface and bottom surface of the stationary valve core, and the bottom opening of the second exhaust channel is formed at the end of the abutment protrusion near the moving valve core.

[0032] When the valve is open, the abutting protrusion abuts against the first sealing gasket, the second sealing gasket separates from the valve, and the second exhaust passage is closed; when the valve is closed, the second sealing gasket abuts against the valve, the first sealing gasket separates from the abutting protrusion, the second exhaust passage opens and can communicate with the first exhaust passage.

[0033] According to another aspect of this application, an air suspension system is further provided, including the solenoid valve described in any of the preceding claims. Attached Figure Description

[0034] The preferred embodiments will now be described in a clear and easy-to-understand manner, in conjunction with the accompanying drawings, to further explain the above-mentioned characteristics, technical features, advantages, and implementation methods of the present invention.

[0035] Figure 1 This is a three-dimensional structural diagram of the solenoid valve according to a preferred embodiment of the present invention;

[0036] Figure 2 This is a top view of the electromagnetic valve according to a preferred embodiment of the present invention;

[0037] Figure 3 yes Figure 2 Schematic diagram of the cross-sectional structure of line AA in the middle;

[0038] Figure 4 This is an exploded structural diagram of the solenoid valve according to a preferred embodiment of the present invention;

[0039] Figure 5 This is a three-dimensional structural diagram of the valve cover of the solenoid valve according to a preferred embodiment of the present invention;

[0040] Figure 6 This is a three-dimensional structural diagram of the valve seat of the solenoid valve according to a preferred embodiment of the present invention;

[0041] Figure 7 This is a three-dimensional structural diagram of the stationary valve core of the solenoid valve according to a preferred embodiment of the present invention;

[0042] Figure 8 This is a three-dimensional structural schematic diagram of the moving valve core of the solenoid valve according to a preferred embodiment of the present invention;

[0043] Figure 9 This is a schematic diagram of a modified embodiment of the solenoid valve according to a preferred embodiment of the present invention;

[0044] Figure 10 This is a schematic diagram of the structure of the valve nozzle of the electromagnetic valve sealing according to a preferred embodiment of the present invention;

[0045] Figure 11This is a schematic diagram of the structure of the solenoid valve in a preferred embodiment of the present invention, showing the valve nozzle abutting protrusion and the sealing gasket in a state of separation.

[0046] Figure 12 This is a schematic diagram of the structure of the solenoid valve in a preferred embodiment of the present invention, showing the abutting protrusion of the valve nozzle and the sealing gasket in abutting state.

[0047] Figure 13 This is a schematic diagram of the abutment protrusion of the solenoid valve according to a preferred embodiment of the present invention;

[0048] Figure 14 This is a schematic diagram of a modified embodiment of the abutment protrusion of the solenoid valve according to a preferred embodiment of the present invention;

[0049] Figure 15 This is a schematic diagram of the valve nozzle of a solenoid valve according to a modified embodiment of the present invention.

[0050] Figure 16 This is a schematic diagram of the structure of the solenoid valve in a modified embodiment of the present invention, showing the abutting protrusion of the valve nozzle abutting against the sealing gasket. Detailed Implementation

[0051] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without any creative effort.

[0052] To keep the drawings concise, each figure only schematically shows the parts relevant to the invention, and these do not represent the actual structure of the product. Furthermore, to facilitate understanding, in some figures, only one of components with the same structure or function is schematically depicted, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one."

[0053] It should also be further understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0054] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0055] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0056] refer to Figures 1 to 16 This application provides a solenoid valve 100, which includes a valve seat 10, a valve cover 20, and a valve core 30. The bottom of the valve seat 10 has a mounting groove 11, and a snap-fit ​​portion 12 is provided at a preset position of the valve seat 10. The valve cover 20 includes a valve cover body 21 and a valve nozzle 22 mounted on the valve cover body 21. The valve cover 20 is adapted to be mounted on the bottom of the valve seat 10. The valve nozzle 22 corresponds to the mounting groove 11. The valve cover 20 also includes a snap-fit ​​arm 23 mounted on the valve cover body 21. When the valve cover 20 is mounted on the bottom of the valve seat 10, the snap-fit ​​arm 23 is adapted to snap into the snap-fit ​​portion 12. The valve core 30 is installed in the mounting groove 11. The valve core 30 includes a stationary valve core 31, a moving valve core 32, and an elastic element 33. The stationary valve core 31 is installed at the bottom of the mounting groove 11, and the moving valve core 32 is installed at the opening of the mounting groove 11. The elastic element 33 is disposed between the stationary valve core 31 and the moving valve core 32. When the stationary valve core 31 is energized, it can attract the moving valve core 32 to move closer to the stationary valve core 31, and the moving valve core 32 separates from the valve nozzle 22, and the valve nozzle 22 opens. When the stationary valve core 31 is de-energized, the elastic element 33 can push the moving valve core 32 to move towards the valve nozzle 22 and press against the valve nozzle 22, and the valve nozzle 22 closes.

[0057] In this application, when the valve cover 20 is installed at the bottom of the valve seat 10, the snap-fit ​​arm 23 can snap into the snap-fit ​​part 12, thereby achieving the effect of pre-fixing the valve cover 20 and the valve seat 10, so that the operator can pick up the solenoid valve 100.

[0058] The stationary valve core 31 is preferably implemented as a stationary iron core, and the moving valve core 32 is preferably implemented as a moving iron core. When the stationary valve core 31 is energized, the stationary valve core 31 can generate a magnetic attraction force to attract the moving valve core 32 to move closer to the stationary valve core 31; when the energization to the stationary valve core 31 is stopped, the stationary valve core 31 stops generating a magnetic attraction force.

[0059] The elastic element 33 is implemented as a spring. When the stationary valve core 31 is energized and generates a magnetic attraction force, driving the moving valve core 32 towards the stationary valve core 31, the elastic element 33 is compressed; after the energization of the stationary valve core 31 stops and the magnetic attraction force of the stationary valve core 31 disappears, the elastic element 33 returns to its original shape and can push the moving valve core 32 away from the stationary valve core 31, pressing against the valve nozzle 22. In some modified embodiments, the elastic element 33 can also be implemented as elastic rubber, and the specific type of the elastic element 33 should not constitute a limitation of this application.

[0060] In this application, the example is taken where the snap-fit ​​arm 23 is located on the valve cover 20 and the snap-fit ​​part 12 is located on the valve seat 10. Those skilled in the art will readily realize that the positions of the snap-fit ​​arm 23 and the snap-fit ​​part 12 can be interchanged, that is, the snap-fit ​​part 12 is formed on the valve cover 20 and the snap-fit ​​arm 23 is formed on the valve seat 10.

[0061] refer to Figure 3 Furthermore, the valve seat 10 includes a valve seat body 13 and a snap-fit ​​block 14. The mounting groove 11 is formed in the valve seat body 13, and the snap-fit ​​block 14 is mounted on one side of the valve seat body 13, forming the snap-fit ​​portion 12. The top of the snap-fit ​​block 14 has a first snap-fit ​​surface 141, and one side of the snap-fit ​​block 14 has a first inclined guide surface 142. The top of the snap-fit ​​arm 23 has a snap-fit ​​protrusion 231, one side of the snap-fit ​​protrusion 231 has a second inclined guide surface 2311, and the bottom of the snap-fit ​​protrusion 231 has a second snap-fit ​​surface 2312.

[0062] During the process of installing the valve cover 20 onto the bottom of the valve seat 10, the first inclined guide surface 142 first contacts the second inclined guide surface 2311 and pushes the snap-fit ​​arm 23 to deform away from the snap-fit ​​block 14; after the snap-fit ​​block 14 passes the snap-fit ​​protrusion 231, the snap-fit ​​arm 23 moves towards the valve seat 10 under the action of the elastic restoring force of the snap-fit ​​arm 23, and the first snap-fit ​​surface 141 abuts against the second snap-fit ​​surface 2312.

[0063] The locking arm 23 has a certain degree of elasticity. As the distance between the valve seat 10 and the valve cover 20 decreases, the locking arm 23 can be pushed away from the valve seat 10. After the valve cover 20 and the valve seat 10 are installed in place, the locking arm 23 can return to its original shape, allowing the first locking surface 141 and the second locking surface 2312 to engage with each other, making the installation process relatively convenient. Similarly, when it is necessary to remove the valve cover 20 from the valve seat 10, the locking arm 23 can be moved away from the valve seat 10, causing the second locking surface 2312 to separate from the first locking surface 141, thereby separating the valve cover 20 from the valve seat 10, making the disassembly process relatively convenient.

[0064] It should be noted that the first inclined guide surface 142 and the second inclined guide surface 2311 are preferably planar guide surfaces. In some modified embodiments, the first inclined guide surface 142 and the second inclined guide surface 2311 may also be arc-shaped guide surfaces, and the specific type of the first inclined guide surface 142 and the second inclined guide surface 2311 should not constitute a limitation on this application. In some modified embodiments, an inclined guide surface may be provided only in one of the snap-fit ​​protrusion 231 and the snap-fit ​​block 14.

[0065] refer to Figure 3 Preferably, there are multiple snap-fit ​​blocks 14 and multiple snap-fit ​​arms 23. Snap-fit ​​blocks 14 are provided at predetermined positions on opposite sides of the valve seat body 13, and each side has two or more snap-fit ​​blocks 14. The number and position of the snap-fit ​​arms 23 correspond to the snap-fit ​​blocks 14.

[0066] Preferably, when the valve cover 20 is not installed on the valve seat 10, the snap-fit ​​arm 23 is tilted at a preset angle toward the center of the valve cover body 21, so that after the valve seat 10 and the valve cover 20 are installed in place, the valve seat 10 can push the snap-fit ​​arm 23 to undergo a large deformation, and can apply a large clamping force to the valve cover 20 in the opposite direction, thereby improving the stability of the installation of the valve seat 10 and the valve cover 20.

[0067] refer to Figure 6 Furthermore, the valve seat body 21 has a clearance groove 131 on the side corresponding to the snap-fit ​​block 14, which extends through the top and bottom of the valve seat body 13. The snap-fit ​​block 14 is disposed at the bottom of the clearance groove 131. By providing the clearance groove 131, the snap-fit ​​block 14 and the snap-fit ​​arm 23 can be accommodated, which helps to reduce the overall size of the solenoid valve 100.

[0068] refer to Figure 9In one modified embodiment, the valve seat body 13 has a threaded hole 132 penetrating the top and bottom of the valve seat body 13 at a preset position. The top of the valve seat body 13 has a snap-fit ​​groove 133 communicating with the threaded hole 132. The diameter of the snap-fit ​​groove 133 is larger than the diameter of the threaded hole 132. The top sidewall of the threaded hole 132 forms the snap-fit ​​portion 12.

[0069] The top of the snap-fit ​​arm 23 has a snap-fit ​​protrusion 231, one side of the snap-fit ​​protrusion 231 has a second inclined guide surface 2311, and the bottom of the snap-fit ​​protrusion 231 has a second snap-fit ​​surface 2312. Multiple snap-fit ​​arms 23 are present, forming a threaded channel 230. During the installation of the valve cover 20 onto the bottom of the valve seat 10, the snap-fit ​​arms 23 are aligned with the bottom opening of the threaded hole 132. The valve seat body 13 contacts the second inclined guide surface 2311, causing the multiple snap-fit ​​arms 23 to deform and move closer together. When the snap-fit ​​protrusion 231 enters the snap-fit ​​groove 133, the elastic arm 23 returns to its original shape, and the second snap-fit ​​surface 2312 abuts against the top sidewall of the threaded hole 132.

[0070] In this modified embodiment, the snap-fit ​​arm 23 is adapted to be inserted into the threaded hole 132 on the valve seat body 13, allowing the snap-fit ​​arm 23 to be hidden within the threaded hole 132, thus making the structure of the solenoid valve 100 more compact. By providing the snap-fit ​​groove 133 on the top of the valve seat body 13 corresponding to the threaded hole 132, the snap-fit ​​protrusion 231 of the snap-fit ​​arm 23 can be accommodated after the snap-fit ​​arm 23 is installed in place. After the snap-fit ​​arm 23 is installed in the threaded hole 132, a screw 24 is inserted into the threaded channel 230 to fix the valve cover 20 and the valve seat 10 together.

[0071] refer to Figure 9 In a modified embodiment, the valve cover 20 further includes a threaded post 25. One end of the threaded post 25 is installed on the valve cover body 21, and the other end is equipped with a plurality of snap-fit ​​arms 23. The threaded post 25 has a threaded hole 250 at the position corresponding to the threaded channel 230. The screw 24 can be installed into the threaded hole 250 after passing through the threaded channel 230 and is fixedly connected to the threaded post 25.

[0072] Preferably, the screw post 25, the snap-fit ​​arm 23, and the valve cover body 21 are integrally connected. By providing the screw post 25 between the snap-fit ​​arm 23 and the valve cover body 21, the length of the screw 24 used can be reduced, which helps to install and fix the valve seat 10 to the valve cover 20.

[0073] refer to Figure 3 and Figure 4 Furthermore, the valve seat 10 also includes a sleeve 15, which includes a first mounting section 151, a connecting section 152, and a second mounting section 153. The first mounting section 151 is mounted in the mounting groove 11 and sleeved on the outside of the moving valve core 32 and the stationary valve core 31. One end of the connecting section 152 is connected to the first mounting section 151, and the other end is connected to the second mounting section 153. The valve cover body 21 has an annular protrusion 211 surrounding the valve nozzle 22, and a fixing groove 212 is formed around the annular protrusion 211. The second mounting section 153 is installed in the fixing groove 212. A first sealing groove 41 is formed between the connection between the second mounting section 153 and the connecting section 152 and the outer side of the annular protrusion 211. A first sealing ring 42 is installed in the first sealing groove 41. A second sealing groove 43 is formed around the bottom of the valve seat body 13 around the mounting groove 11. A second sealing ring 44 is installed in the second sealing groove 43 and abuts against the valve cover body 21.

[0074] When the valve cover 20 is installed on the valve seat 10 and the snap-fit ​​arm 23 is snapped into the snap-fit ​​part 12, the first sealing ring 42 and the second sealing ring 44 are compressed. The first sealing ring 42 and the second sealing ring 44 respectively exert a force on the valve cover 20 and the valve seat 10 to push them away from each other, so that the first snap-fit ​​surface 141 can tightly abut against the second snap-fit ​​surface 2312, thereby further improving the stability of the valve cover 20 when it is installed on the valve seat 10.

[0075] refer to Figure 3 The stationary valve core 31 has an abutment protrusion 311 at its bottom, and a first groove 312 is provided around the abutment protrusion 311; the moving valve core 32 has a second groove 321 at its top. One end of the elastic member 33 is installed in the first groove 312, and the other end is installed in the second groove 321. The elastic member 33 has an axially opened through hole, through which the abutment protrusion 311 passes. When the stationary valve core 31 is energized, it attracts the moving valve core 32 and moves it a predetermined distance closer to the stationary valve core 31. When the moving valve core 32 separates from the valve nozzle 22, the abutment protrusion 231 is adapted to enter the second groove 321.

[0076] By providing the first groove 312 and the second groove 321, the top and bottom of the elastic member 33 can be accommodated respectively, thereby improving the stability of the elastic member 33 between the moving valve core 32 and the stationary valve core 31. Especially during the process of the moving valve core 32 moving closer to or further away from the stationary valve core 31, the risk of the elastic member 33 sliding relative to the stationary valve core 31 and / or the moving valve core 32 can be reduced. On the other hand, the elastic member 33 is sleeved on the outside of the abutting protrusion 311 of the stationary valve core 31, and the abutting protrusion 311 can further improve the stability of the elastic member 33 between the stationary valve core 31 and the moving valve core 32.

[0077] refer to Figure 8 The moving valve core 32 has a first exhaust channel 322 axially arranged at a preset position, the first exhaust channel 322 penetrating the top surface and bottom surface of the moving valve core 32; the top of the moving valve core 32 has a first receiving groove 323, the bottom of the moving valve core 32 has a second receiving groove 324, the first receiving groove 323 is located at the bottom of the first groove 312, and the moving valve core 32 also includes a first sealing gasket 325 installed in the first receiving groove 323 and a second sealing gasket 326 installed in the second receiving groove 324.

[0078] The stationary valve core 31 has a second exhaust channel 313 arranged axially at a preset position. The second exhaust channel 313 penetrates the top surface and bottom surface of the stationary valve core 31, and the bottom opening of the second exhaust channel 313 is formed at one end of the abutment protrusion 311 near the moving valve core 32.

[0079] When the valve nozzle 22 is open, the abutting protrusion 311 abuts against the first sealing gasket 325, the second sealing gasket 326 separates from the valve nozzle 22, and the second exhaust passage 313 is closed, allowing gas entering from the valve nozzle 22 to be discharged through the exhaust port on the valve cover 20; when the valve nozzle 22 is closed, the second sealing gasket 326 abuts against the valve nozzle 22, the first sealing gasket 325 separates from the abutting protrusion 311, the second exhaust passage 313 is open and can communicate with the first exhaust passage 322, allowing gas between the valve cover 20 and the valve seat 10 to be discharged through the first exhaust passage 322 and the second exhaust passage 313.

[0080] refer to Figure 3 The static valve core 31 has a third sealing groove 45 at a preset position corresponding to the first mounting section 151 of the sleeve 15. A third sealing ring 46 is installed in the third sealing groove 45, and the third sealing ring 46 abuts against the inner wall of the first mounting section 151.

[0081] The valve nozzle 22 includes a valve nozzle body 10a and an abutment protrusion 20a. The valve nozzle body 10a has a pressing end 11a and a connecting end 12a, and a first fluid channel 13a penetrating the pressing end 11a and the connecting end 12a. The abutment protrusion 20a is installed on the pressing end 11a, and the abutment protrusion 20a surrounds to form a second fluid channel 21a. The first fluid channel 13a communicates with the second fluid channel 21a. The diameter of the abutment protrusion 20a is smaller than the diameter of the valve nozzle body 10a, and the side of the abutment protrusion 20a away from the valve nozzle body 10a is an abutment plane 22a.

[0082] When the abutment protrusion 20a is installed on the valve body 10a, the first fluid channel 13a and the second fluid channel 21a correspond to each other and are interconnected to form the fluid channel for fluid movement.

[0083] During use, the second sealing gasket 326 is adapted to be placed on the side of the abutment protrusion 20a away from the valve body 10a. During use, when the valve 22 and the second sealing gasket 326 approach each other, the abutment surface 22a of the abutment protrusion 20a is adapted to abut against the second sealing gasket 326, thereby sealing the opening of the second fluid passage 21a away from the valve body 10a by means of the second sealing gasket 326. Since the abutment surface 22a is provided on the side of the abutment protrusion 20a away from the valve body 10a, when the valve 22 and the second sealing gasket 326 approach each other, the abutment surface 22a contacts the second sealing gasket 326. Since the end of the abutting protrusion 20a that contacts the second sealing gasket 326 is the abutting plane 22a, the contact area between the abutting protrusion 20a and the second sealing gasket 326 can be increased, the pressure exerted by the abutting protrusion 20a on the second sealing gasket 326 can be reduced, and the service life of the second sealing gasket 326 can be improved.

[0084] refer to Figure 10 Furthermore, the outer peripheral surface of the abutting protrusion 20a is an abutting slope 23a. The end of the abutting protrusion 20a away from the valve body 10a has a first diameter, and the end of the abutting protrusion 20a near the valve body 10a has a second diameter, wherein the first diameter is smaller than the second diameter. That is, the abutting protrusion 20a is generally conical, and the diameter of the end of the abutting protrusion 20a away from the valve body 10a is smaller than the diameter of the end of the abutting protrusion 20a near the valve body 10a.

[0085] When used in conjunction with the second sealing gasket 326, the end of the abutting protrusion 20a away from the valve body 10a abuts against the second sealing gasket 326. The end of the abutting protrusion 20a away from the valve body 10a has a smaller diameter, which can reduce the contact area with the second sealing gasket 326 and facilitate sealing in conjunction with the second sealing gasket 326.

[0086] refer to Figure 10 Furthermore, the connection between the sidewall of the second fluid channel 21a and the abutting plane 22a has a first rounded corner 24a; the connection between the abutting slope 23a and the abutting plane 22a has a second rounded corner 25a. When the abutting protrusion 20a abuts against the second sealing gasket 326, the portion of the second sealing gasket 326 in contact with the abutting protrusion 20a will be somewhat recessed due to the compression of the abutting protrusion 20a. By providing the first rounded corner 24a and the second rounded corner 25a, when the end of the abutting protrusion 20a with the abutting plane 22a abuts against the second sealing gasket 326, the contact area between the abutting protrusion 20a and the second sealing gasket 326 can be further increased, thereby further increasing the protection of the second sealing gasket 326. Furthermore, by providing the first rounded corner 24a and the second rounded corner 25a at the end of the abutting protrusion 20a away from the valve body 10a, the portion of the abutting protrusion 20a that contacts the second sealing gasket 326 can be made smoother, further reducing the risk of damaging the second sealing gasket 326 when it contacts the second sealing gasket 326.

[0087] refer to Figure 11 and Figure 12 In some embodiments, gas is adapted to enter from the first fluid channel 13a and the second fluid channel 21a. In the open state, gas is adapted to enter from the first fluid channel 13a and the second fluid channel 21a, pass through the channel between the abutting surface 22a and the second sealing gasket 326, and exit through the gap between the abutting inclined surface 23a and the second sealing gasket 326; in the closed state, the abutting surface 22a abuts against the second sealing gasket 326, and the second sealing gasket 326 corresponding to the first rounded corner 24a separates from the first rounded corner 24a under the action of gas pressure, and the second rounded corner 25a abuts against the second sealing gasket 326. The fluid in the fluid channel of the valve nozzle 22 is adapted to move along the first fluid channel 13a towards the second fluid channel 21a within the fluid channel, and exit from the opening of the second fluid channel 21a on the side away from the valve nozzle body 10a.

[0088] In such Figure 12 and Figure 13When the gas enters from the first fluid channel 13a and the second fluid channel 21a, the gas pressure in the second fluid channel 21a within the abutting protrusion 20a is greater than the gas pressure outside the abutting slope 23a. The portion of the second sealing gasket 326 corresponding to the second fluid channel 21a will undergo greater deformation than the portion corresponding to the abutting slope 23a. In other words, the portion of the second sealing gasket 326 corresponding to the second fluid channel 21a will be concave as a result of the pressure from the abutting protrusion 20a, with less deformation, and will remain largely planar, not fitting against the first rounded corner 24a located inside the abutting protrusion 20a. Conversely, the portion of the second sealing gasket 326 corresponding to the abutting slope 23a will have lower gas pressure, resulting in greater deformation of the second sealing gasket 326, and it will fit and seal against the second rounded corner located outside the abutting protrusion 20a. In this embodiment, the portion of the abutting protrusion 20a that contacts and seals the second sealing gasket 326 is located at a rearward position relative to the gas flow direction, and is far from the high-pressure area where the gas enters. Therefore, it does not directly act on the high-pressure area where the gas enters, thus achieving a better sealing effect.

[0089] In some embodiments, the radius of the second rounded corner 25a is greater than a first preset value. The radius of the first rounded corner 24a is smaller than the radius of the second rounded corner 25a, allowing the portion of the second rounded corner 25a abutting the protrusion 20a to have a smaller rate of change and be closer to a plane. This facilitates the fit between the portion of the second rounded corner 25a abutting the protrusion 20a and the second sealing gasket 326, preventing significant deformation of the second sealing gasket 326. In some embodiments, the radius of the second rounded corner 25a is smaller than the first preset value, allowing the second rounded corner 25a to bend quickly away from the abutting plane 22a. This causes the corresponding second sealing gasket 326 to also bend quickly, increasing the degree of coverage of the end of the abutting protrusion 20a away from the valve body 10a and improving the sealing effect.

[0090] refer to Figure 13 The radius of the first rounded corner is R1, the radius of the second rounded corner is R2, and the diameter of the end of the abutting protrusion 20a away from the valve body 10a is d. R1 is less than R2. For example, but not limited to, R1 is less than d / 2 and R2 is greater than d / 2.

[0091] refer to Figure 14In a modified embodiment, the abutting slope 23a has an abutting groove 230a on the side near the second rounded corner 25a. When the abutting protrusion 20a abuts against the second sealing gasket 326 at the end away from the valve body 10a, the second sealing gasket 326 near the second rounded corner 25a is adapted to enter the abutting groove 230a.

[0092] By setting the abutment groove 230a, when the portion of the abutment protrusion 20a with the second rounded corner 25a contacts the second sealing gasket 326, a portion of the second sealing gasket 326 will enter the abutment groove 230a, increasing the contact area between the abutment protrusion 20a and the second sealing gasket 326, and causing the trajectory of the contact surface between the abutment protrusion 20a and the second sealing gasket 326 to have a certain deformation, thereby improving the gas sealing effect.

[0093] Specifically, the second rounded corner 25a is located at the corner between the abutting plane 22a and the abutting inclined surface 23a. The angle between the abutting plane 22a and the abutting inclined surface 23a is greater than 90 degrees. The curve of the second rounded corner 25a is relatively close to the plane where the abutting inclined surface 23a is located, and the overall trajectory is relatively gentle. After the introduction of the abutting groove 230a, the angle between the tangent a of the abutting groove 230a near the end of the second rounded corner 25a and the abutting plane 22a is closer to 90 degrees. This allows the second rounded corner 25a to protrude more from the abutting protrusion 20a. Consequently, a portion of the second sealing gasket 326 in contact with the second rounded corner 25a is nearly horizontal, while the other portion is nearly vertical. The gasket fits snugly against the second rounded corner 25a and has a large deformation. Compared to a flatter state, this increases the degree of sealing of the second sealing gasket 326 around the end of the abutting protrusion 20a away from the valve body 10a, thus improving the sealing effect.

[0094] In a modified embodiment, the radius of the second rounded corner 25a gradually increases from the end of the second rounded corner 25a near the abutting plane 22a to the end of the second rounded corner 25a near the abutting inclined surface 23a. The smaller radius of the end of the second rounded corner 25a near the abutting plane 22a allows it to quickly descend away from the abutting plane 22a, resulting in a larger bend in the corresponding second sealing gasket 326 and improving the sealing effect. The larger radius of the end of the second rounded corner 25a near the abutting inclined surface 23a allows for a slower change in the corresponding portion of the second rounded corner 25a, contributing to a smaller deformation of the corresponding second sealing gasket 326.

[0095] refer to Figure 15 and Figure 16 In some embodiments, the gas is adapted to exit from the first fluid channel 13a and the second fluid channel 21a. In the open state, the gas is adapted to enter the channel between the abutting plane 22a and the second sealing gasket 326 through the gap between the abutting slope 23a and the second sealing gasket 326, and exit through the first fluid channel 13a and the second fluid channel 21a; in the closed state, the abutting plane 22a abuts against the second sealing gasket 326, and the second sealing gasket 326 corresponding to the second rounded corner 25a is separated from the second rounded corner 25a under the action of gas pressure, and the first rounded corner 24a abuts against the second sealing gasket 326.

[0096] In other words, the fluid in the fluid channel of the valve nozzle 22 is adapted to move along the second fluid channel 21a toward the first fluid channel 13a and exit from the opening on the side of the first fluid channel 13a away from the abutment protrusion 20a.

[0097] In such Figure 15 and Figure 16 In the air intake method where the gas exits from the first fluid channel 13a and the second fluid channel 21a, the gas pressure in the second fluid channel 21a within the abutting protrusion 20a is less than the gas pressure outside the abutting slope 23a. The portion of the second sealing gasket 326 corresponding to the abutting slope 23a undergoes greater deformation than the portion corresponding to the second fluid channel 21a. That is, the portion of the second sealing gasket 326 corresponding to the abutting slope 23a undergoes greater deformation under the pressure of the abutting protrusion 20a and the gas pressure, but remains largely planar with minimal deformation, and does not fit against the second rounded corner 25a located outside the abutting protrusion 20a. The portion of the second sealing gasket 326 corresponding to the second fluid channel 21a has lower gas pressure, causing the second sealing gasket 326 to undergo greater deformation and fit and seal against the first rounded corner 24a located inside the abutting protrusion 20a. In this embodiment, the portion of the abutting protrusion 20a that contacts and seals the second sealing gasket 326 is located at a rearward position relative to the gas flow direction, and is far from the high-pressure area where the gas enters. Therefore, it does not directly act on the high-pressure area where the gas enters, thus achieving a better sealing effect.

[0098] In some embodiments, the radius of the first rounded corner 24a is smaller than the second preset value, which allows the portion of the first rounded corner 24a of the abutting protrusion 20a to have a smaller rate of change and be closer to a plane. This facilitates the fit between the portion of the first rounded corner 24a of the abutting protrusion 20a and the second sealing gasket 326, preventing significant deformation of the second sealing gasket 326. In some embodiments, the radius of the first rounded corner 24a is smaller than the second preset value, which allows the first rounded corner 24a to bend quickly away from the abutting plane 22a. This causes the corresponding second sealing gasket 326 to bend quickly as well, increasing the degree of coverage of the end of the abutting protrusion 20a away from the valve body 10a and improving the sealing effect.

[0099] According to another aspect of this application, an air suspension system is further provided, including the solenoid valve and air spring described in the above embodiments. By controlling the on / off state of the solenoid valve, the air intake and exhaust of the air spring can be controlled, thereby adjusting the stiffness of the air spring.

[0100] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the invention. The advantages of the present invention have been fully and effectively realized. The functional and structural principles of the present invention have been demonstrated and explained in the embodiments; any variations or modifications can be made to the implementation of the present invention without departing from these principles.

Claims

1. A solenoid valve, characterized in that, include: The valve seat has a mounting groove at its bottom and a snap-fit ​​part at a preset position. A valve cover, comprising a valve cover body and a valve nozzle mounted on the valve cover body, the valve cover being adapted to be mounted on the bottom of the valve seat, the valve nozzle corresponding to the mounting groove, the valve cover further comprising a snap-fit ​​arm mounted on the valve cover body, the snap-fit ​​arm being adapted to snap into the snap-fit ​​portion when the valve cover is mounted on the bottom of the valve seat; The valve core is installed in the mounting groove. The valve core includes a stationary valve core, a moving valve core, and an elastic element. The stationary valve core is installed at the bottom of the mounting groove, and the moving valve core is installed at the opening of the mounting groove. The elastic element is disposed between the stationary valve core and the moving valve core. When the stationary valve core is energized, it can attract the moving valve core and move it closer to the stationary valve core, separating the moving valve core from the valve nozzle, and opening the valve nozzle. When the stationary valve core is de-energized, the elastic element can push the moving valve core towards the valve nozzle and press it against the valve nozzle, closing the valve nozzle.

2. The solenoid valve according to claim 1, characterized in that, The valve seat includes a valve seat body and a snap-fit ​​block. The mounting groove is formed in the valve seat body, and the snap-fit ​​block is installed on one side of the valve seat body, forming the snap-fit ​​portion. The top of the snap-fit ​​block has a first snap-fit ​​surface, and one side of the snap-fit ​​block has a first inclined guide surface; The top of the snap-fit ​​arm has a snap-fit ​​protrusion, one side of the snap-fit ​​protrusion has a second inclined guide surface, and the bottom of the snap-fit ​​protrusion has a second snap-fit ​​surface. During the process of installing the valve cover onto the bottom of the valve seat, the first inclined guide surface first contacts the second inclined guide surface and pushes the snap-fit ​​arm to deform away from the snap-fit ​​block; after the snap-fit ​​block passes the snap-fit ​​protrusion, the snap-fit ​​arm moves towards the valve seat under the action of the elastic restoring force of the snap-fit ​​arm, and the first snap-fit ​​surface abuts against the second snap-fit ​​surface.

3. The solenoid valve according to claim 2, characterized in that, There are multiple snap-fit ​​blocks and snap-fit ​​arms. When the valve cover is not installed on the valve seat, the snap-fit ​​arms are tilted at a preset angle toward the center of the valve cover body.

4. The solenoid valve according to claim 2, characterized in that, The valve seat body has a clearance groove on the side corresponding to the snap-fit ​​block, which runs through the top and bottom of the valve seat body, and the snap-fit ​​block is located at the bottom of the clearance groove.

5. The solenoid valve according to claim 2, characterized in that, The valve seat body has a threaded hole at a preset position that passes through the top and bottom of the valve seat body. The top of the valve seat body has a snap-fit ​​groove that communicates with the threaded hole. The diameter of the snap-fit ​​groove is larger than the diameter of the threaded hole. The top sidewall of the threaded hole forms the snap-fit ​​part. The top of the snap-fit ​​arm has a snap-fit ​​protrusion, one side of the snap-fit ​​protrusion has a second inclined guide surface, the bottom of the snap-fit ​​protrusion has a second snap-fit ​​surface, and there are multiple snap-fit ​​arms, which surround each other to form a threaded channel. During the process of installing the valve cover onto the bottom of the valve seat, the snap-fit ​​arm is aligned with the bottom opening of the threaded hole, the valve seat body contacts the second inclined guide surface, and the multiple snap-fit ​​arms are pushed to deform and move closer to each other; when the snap-fit ​​protrusion enters the snap-fit ​​groove, the elastic arm returns to its original shape, and the second snap-fit ​​surface abuts against the top sidewall of the threaded hole.

6. The solenoid valve according to claim 2, characterized in that, The valve seat further includes a sleeve, which includes a first mounting section, a connecting section, and a second mounting section. The first mounting section is mounted in the mounting groove and sleeved on the outside of the moving valve core and the stationary valve core. One end of the connecting section is connected to the first mounting section, and the other end is connected to the second mounting section. The valve cover body has an annular protrusion around the valve nozzle, and a fixing groove is formed around the annular protrusion. The second mounting section is installed in the fixing groove. A first sealing groove is formed between the connection between the second mounting section and the connecting section and the outer side of the annular protrusion. A first sealing ring is installed in the first sealing groove. A second sealing groove is provided around the mounting groove at the bottom of the valve seat body. A second sealing ring is installed in the second sealing groove and abuts against the valve cover body.

7. The solenoid valve according to any one of claims 1 to 5, characterized in that, The valve nozzle includes a valve nozzle body and a pressing protrusion. The valve nozzle body has a pressing end and a connecting end, and the valve nozzle body has a first fluid channel penetrating the pressing end and the connecting end. The abutting protrusion is installed on the abutting end, and the abutting protrusion surrounds to form a second fluid channel. The first fluid channel is connected to the second fluid channel. The diameter of the abutting protrusion is smaller than the diameter of the valve body, and the side of the abutting protrusion away from the valve body is an abutting plane. The abutting end is adapted to abut against the sealing gasket on the moving valve core.

8. The solenoid valve according to claim 7, characterized in that, The outer peripheral side of the abutting protrusion is an abutting slope. The end of the abutting protrusion away from the valve body has a first diameter, and the end of the abutting protrusion close to the valve body has a second diameter. The first diameter is smaller than the second diameter. The connection between the sidewall of the second fluid channel and the abutting plane has a first rounded corner; the connection between the abutting slope and the abutting plane has a second rounded corner. In the open state, gas is suitable to enter from the first fluid channel and the second fluid channel, pass through the channel between the abutting plane and the sealing gasket, and then exit through the gap between the abutting slope and the sealing gasket; in the closed state, the abutting plane abuts against the sealing gasket, the sealing gasket corresponding to the first rounded corner portion separates from the first rounded corner under the action of gas pressure, and the second rounded corner abuts against the sealing gasket.

9. The solenoid valve according to any one of claims 1 to 5, characterized in that, The bottom of the stationary valve core has an abutting protrusion, and a first groove is provided around the abutting protrusion; the top of the moving valve core has a second groove. One end of the elastic element is installed in the first groove, and the other end is installed in the second groove. The elastic element has an axially opened through hole, and the abutment protrusion passes through the through hole. When the stationary valve core is energized, it attracts the moving valve core and moves it a predetermined distance toward the stationary valve core. When the moving valve core separates from the valve nozzle, the abutting protrusion is adapted to enter the second groove.

10. The solenoid valve according to claim 9, characterized in that, The moving valve core has a first exhaust channel arranged axially at a preset position, the first exhaust channel passing through the top surface and bottom surface of the moving valve core; the top of the moving valve core has a first receiving groove, the bottom of the moving valve core has a second receiving groove, the first receiving groove is located at the bottom of the first groove, and the moving valve core also includes a first sealing gasket installed in the first receiving groove and a second sealing gasket installed in the second receiving groove; The stationary valve core has a second exhaust channel arranged axially at a preset position. The second exhaust channel penetrates the top surface and bottom surface of the stationary valve core, and the bottom opening of the second exhaust channel is formed at the end of the abutment protrusion near the moving valve core. When the valve is open, the abutting protrusion abuts against the first sealing gasket, the second sealing gasket separates from the valve, and the second exhaust passage is closed; when the valve is closed, the second sealing gasket abuts against the valve, the first sealing gasket separates from the abutting protrusion, the second exhaust passage opens and can communicate with the first exhaust passage.

11. An air suspension system, characterized in that, The solenoid valve includes any one of claims 1 to 10.

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