Breather plug, oil can, suspension system, transmission and vehicle

Abstract

This application relates to a vent plug, an oil reservoir, a suspension system, a transmission, and a vehicle. The vent plug includes a seat, a one-way valve, and a first spring. The seat has a first port, a mounting hole, and a second port connected sequentially. The one-way valve is slidably disposed in the mounting hole, having a first channel within it, and a second channel defined between the outer surface of the one-way valve and the wall of the mounting hole. The two ends of the first spring are respectively connected to the seat and the one-way valve. The first channel is configured to open when the pressure difference between the first port and the second port exceeds a first threshold, and the second channel is configured to open when the pressure difference between the second port and the first port exceeds a second threshold. Through the above solution, this application enables the vent plug to open bidirectionally, allowing the sealed space using this vent plug to ventilate under various operating conditions. This helps maintain a relative balance between the internal and external air pressure of the sealed space, thereby improving the sealing performance of the sealed space and the working efficiency of related devices.

Description

Technical Field

[0001] This application relates to the field of automotive technology, and more particularly to a breather plug, oil reservoir, suspension system, transmission, and vehicle. Background Technology

[0002] Vehicles have multiple enclosed spaces, such as oil reservoirs. Temperature changes and fluid flow can cause pressure differences between the inside and outside of these enclosed spaces. To prevent pressure imbalances from compromising the seal of these spaces, vent plugs are needed. A vent plug is a device used to balance the pressure inside and outside an enclosed space. When the pressure difference reaches a threshold, the vent plug opens, allowing airflow to balance the pressure inside and outside the enclosed space.

[0003] Currently, the vent plug is one-way open, meaning it opens when the air pressure inside the sealed space is greater than the external air pressure. When the external air pressure is greater than the internal air pressure, the vent plug cannot open, leading to an imbalance in air pressure within and outside the sealed space. This, in turn, reduces the sealing performance of the sealed space and the efficiency of related devices. Utility Model Content

[0004] This application provides a vent plug that can be opened in both directions, so that the sealed space using this vent plug can maintain relative balance with the external air pressure under various working conditions, thereby at least solving the above-mentioned technical problems.

[0005] To achieve the above objectives, according to a first aspect of this application, a vent plug is provided, comprising a plug seat, a one-way valve, and a first spring; the plug seat has a first port, a mounting hole, and a second port connected in sequence; the one-way valve is slidably disposed in the mounting hole, having a first channel therein, and a second channel is defined between the outer surface of the one-way valve and the wall of the mounting hole; the two ends of the first spring are respectively connected to the plug seat and the one-way valve; wherein the first channel is configured to open when the pressure difference between the first port and the second port exceeds a first threshold, and the second channel is configured to open when the pressure difference between the second port and the first port exceeds a second threshold.

[0006] Optionally, the vent plug also includes a waterproof and breathable membrane assembly connected to the plug seat and covering the first port and the second port configured to be away from the enclosed space.

[0007] Optionally, a waterproof and breathable membrane assembly covers the first port, which is configured to be away from the enclosed space.

[0008] Optionally, the waterproof and breathable membrane assembly includes a frame and a waterproof and breathable membrane; the frame is connected to the plug seat, and the frame is provided with a first air hole; the waterproof and breathable membrane is connected to the frame and covers the first air hole.

[0009] Optionally, a waterproof and breathable membrane is disposed on the side of the skeleton near the one-way valve.

[0010] Optionally, the skeleton includes a ring and a sheet, the ring is connected to the plug seat, the sheet is disposed in the inner hole of the ring, the first vent is disposed in the sheet, and the waterproof and breathable membrane is attached to the sheet.

[0011] Optionally, the sheet body can be an arched structure or a spherical shell structure.

[0012] Optionally, a drainage groove is provided at the end of the ring body away from the plug seat, and the drainage groove connects the inner and outer sides of the ring body.

[0013] Optionally, the vent plug also includes a limiting member and a fixing spring. One end of the limiting member is connected to the plug seat, and the other end is located on the side of the waterproof and breathable membrane assembly away from the one-way valve. The two ends of the fixing spring abut against the waterproof and breathable membrane assembly and the portion of the limiting member located on the side of the waterproof and breathable membrane assembly away from the one-way valve, respectively, so as to hold the waterproof and breathable membrane assembly against the end face of the plug seat.

[0014] Optionally, the vent plug also includes a first sealing ring disposed between the end face of the plug seat and the waterproof and breathable membrane assembly.

[0015] Optionally, the vent plug also includes a dust cover, which is configured to be located away from the enclosed space near the first port and the second port. The dust cover is fitted over the end of the plug seat and connected to the plug seat, and an exhaust gap is defined between the inner surface of the dust cover and the outer surface of the plug seat.

[0016] Optionally, the dust cover is riveted to the plug seat.

[0017] Optionally, a portion of the outer surface of the plug seat protrudes radially to form a first annulus, and a dust cover is spaced apart from the first annulus.

[0018] Optionally, the vent plug further includes a second sealing ring, the wall of the mounting hole has a first annular surface, the outer surface of the one-way valve has a second annular surface, and the second sealing ring is disposed between the first annular surface and the second annular surface and is sealed to the first annular surface and the second annular surface.

[0019] Optionally, both the first and second annular surfaces are perpendicular to the axis of the mounting hole, and the second sealing ring is fixed to one of the first and second annular surfaces and in contact with the other.

[0020] Optionally, the second sealing ring is connected to the first annular surface and contacts the second annular surface.

[0021] Optionally, a first stepped groove is provided on the wall of the mounting hole, and a second sealing ring is disposed in the first stepped groove and contacts the groove circumferential surface of the first stepped groove. The bottom surface of the first stepped groove is a first annular surface. A portion of the outer surface of the one-way valve protrudes radially to form a second annular body. The second annular body is inserted into the stepped groove, and the surface of the second annular body facing the second sealing ring is a second annular surface.

[0022] Optionally, the check valve has a third annular surface that is clearance-fitted with the mounting hole, and a first air groove is provided on the third annular surface, the first air groove extending axially along the mounting hole.

[0023] Optionally, the first spring is disposed in the mounting hole and located at the end of the one-way valve near the first port.

[0024] Optionally, the vent plug also includes a washer located in the mounting hole and connected to the wall of the mounting hole, with the end of the first spring away from the one-way valve abutting against the washer.

[0025] Optionally, the vent plug also includes an open retaining ring, a second stepped groove is provided on the wall of the mounting hole, a retaining groove is provided on the circumferential surface of the second stepped groove, the outer periphery of the open retaining ring is inserted into the retaining groove, and a washer is provided in the second stepped groove and located between the open retaining ring and the first spring.

[0026] Optionally, a portion of the outer surface of the check valve protrudes radially to form a second ring, and the end of the first spring near the check valve is sleeved on the end of the check valve and abuts against the second ring.

[0027] Optionally, the one-way valve includes a valve body, a spring seat, a valve core, and a second spring; the valve body is slidably disposed in the mounting hole, and the valve body has a first through hole; the spring seat is sleeved on one end of the valve body, and defines a mounting cavity between the spring seat and the valve body, and a second vent is provided on the part of the spring seat near the end of the valve body, the second vent communicating with the mounting cavity; the valve core is disposed in the mounting cavity and contacts the end face of the valve body; the second spring is disposed in the mounting cavity and abuts against the valve core and the spring seat; wherein, the first through hole is a first channel; the outer peripheral surface of the valve body and the outer peripheral surface of the spring seat are spaced apart from the hole wall of the mounting hole to define a second channel.

[0028] Optionally, the one-way valve also includes a valve stem, one end of which is connected to the valve core, and the other end extends into the first through hole. A portion of the outer surface of the valve stem is spaced apart from the wall of the first through hole to define a first channel, and another portion of the outer surface contacts the wall of the first through hole.

[0029] Optionally, a second air groove is provided on the valve stem, the second air groove extending along the axial direction of the valve stem and penetrating the end face of the valve stem away from the valve core.

[0030] Optionally, a third vent is provided at the end of the spring seat away from the valve body; and / or, the valve stem is made of metal.

[0031] Optionally, the check valve may also include a third sealing ring disposed between the valve core and the valve body.

[0032] Optionally, the spring seat is riveted to the valve body.

[0033] Optionally, a third stepped groove is provided at one end of the outer surface of the plug seat to define a mounting portion at one end of the plug seat, the mounting portion being configured to define a component connection that defines a sealed space.

[0034] According to a second aspect of this application, an oil container is provided, which includes the aforementioned vent plug.

[0035] According to a third aspect of this application, a suspension system is provided, the suspension system including the aforementioned oil reservoir.

[0036] According to a fourth aspect of this application, a transmission is provided that includes the aforementioned vent plug.

[0037] According to a fifth aspect of this application, a vehicle is provided, the vehicle including at least one of the aforementioned vent plug, the aforementioned suspension system, and the aforementioned transmission.

[0038] In the vent plug of this application embodiment, through the above technical solution, when the pressure difference between the first port and the second port exceeds a first threshold, ventilation can be carried out through the first channel to balance the internal and external air pressures; when the pressure difference between the second port and the first port exceeds the first threshold, ventilation can be carried out through the second channel to balance the internal and external air pressures. This allows the vent plug to open bidirectionally, enabling ventilation in the sealed space under various operating conditions, thus facilitating a relative balance between the internal and external air pressures of the sealed space, thereby improving the sealing performance of the sealed space and the working efficiency of related devices.

[0039] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0040] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0041] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0042] Figure 1 This is a schematic diagram of the internal structure of the vent plug provided in an exemplary embodiment of this disclosure;

[0043] Figure 2 This is an exploded view of the vent plug provided in an exemplary embodiment of this disclosure;

[0044] Figure 3 This is a schematic diagram of the structure of the vent plug during air intake provided in an exemplary embodiment of this disclosure;

[0045] Figure 4 This is a schematic diagram of the structure of the vent plug during venting provided in an exemplary embodiment of this disclosure;

[0046] Figure 5 This is a schematic diagram of the structure of the waterproof and breathable membrane assembly provided in an exemplary embodiment of this disclosure;

[0047] Figure 6 This is a side view of a waterproof and breathable membrane assembly provided in an exemplary embodiment of this disclosure;

[0048] Figure 7 This is a schematic diagram of the structure of the third torus provided in an exemplary embodiment of this disclosure;

[0049] Figure 8 This is a schematic diagram of the valve stem provided in an exemplary embodiment of this disclosure;

[0050] Figure 9 This is a schematic diagram of the structure of the oil can provided in an exemplary embodiment of this disclosure.

[0051] Explanation of reference numerals in the attached figures:

[0052] 20 - Oil can; 21 - Outer shell;

[0053] 10-Vent plug;

[0054] 11-First spring;

[0055] 12-Plug seat; 121-First port; 122-Second port; 123-Mounting hole; 1231-First annular surface; 1232-First stepped groove; 1233-Second stepped groove; 1234-Slot; 124-First annular body; 125-Third stepped groove;

[0056] 13-One-way valve; 130-Third sealing ring; 131-First channel; 132-Second annular surface; 133-Third annular surface; 134-First air groove; 135-Second ring body; 136-Valve body; 1361-First through hole; 1362-Mounting cavity;

[0057] 137 - Spring seat; 1371 - Second vent; 1372 - Third vent;

[0058] 138-Valve core; 1381-Valve stem; 1382-Second air groove; 139-Second spring;

[0059] 14-Second Channel;

[0060] 15-Waterproof and breathable membrane assembly; 151-Frame; 1511-First vent; 1512-Ring; 1513-Sheet; 1514-Drainage groove; 152-Waterproof and breathable membrane; 153-First sealing ring; 154-Limiting element; 155-Fixing spring;

[0061] 16-Dust cover;

[0062] 17 - Second sealing ring;

[0063] 18-Washer; 19-Open retaining ring. Detailed Implementation

[0064] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0065] Please see Figure 1 and Figure 2 In a first aspect, embodiments of this application provide a vent plug 10. The vent plug 10 includes a plug seat 12, a one-way valve 13, and a first spring 11. The plug seat 12 has a first port 121, a mounting hole 123, and a second port 122 connected sequentially. The one-way valve 13 is slidably disposed in the mounting hole 123. The one-way valve 13 has a first channel 131, and a second channel 14 is defined between the outer surface of the one-way valve 13 and the wall of the mounting hole 123. The two ends of the first spring 11 are respectively connected to the plug seat 12 and the one-way valve 13. The first channel 131 is configured to open when the pressure difference between the first port 121 and the second port 122 exceeds a first threshold, and the second channel 14 is configured to open when the pressure difference between the second port 122 and the first port 121 exceeds a second threshold.

[0066] It can be understood that the pressure difference between the first port 121 and the second port 122 is the difference between the pressure at the first port 121 and the pressure at the second port 122. Correspondingly, the pressure difference between the second port 122 and the first port 121 is the difference between the pressure at the second port 122 and the pressure at the first port 121.

[0067] It is understood that when the voltage difference between the first port 121 and the second port 122 exceeds the first threshold, the first channel 131 is turned on to connect the first port 121 and the second port 122, and the second channel 14 is turned off.

[0068] It is understood that when the voltage difference between the second port 122 and the first port 121 exceeds the first threshold, the second channel 14 is turned on to connect the first port 121 and the second port 122, while the first channel 131 is in the off state.

[0069] In this configuration, the end of the vent plug 10 near the first port 121 may be connected to the device defining the sealed space. Thus, when the pressure difference between the first port 121 and the second port 122 exceeds a first threshold, the sealed space exhausts air through the second channel 14; when the pressure difference between the second port 122 and the first port 121 exceeds a second threshold, air enters the sealed space through the first channel 131.

[0070] Alternatively, the end of the vent plug 10 near the second port 122 can be connected to the device defining the sealed space. In this case, when the pressure difference between the first port 121 and the second port 122 exceeds a first threshold, air enters the sealed space through the first channel 131, such as... Figure 3 As shown; when the pressure difference between the second port 122 and the first port 121 exceeds the second threshold, the sealed space exhausts gas outward through the second channel 14, such as... Figure 4 As shown.

[0071] The following embodiments are mainly described with the end of the vent plug 10 near the second port 122 connected to the device that defines the sealed space (that is, when the pressure difference between the first port 121 and the second port 122 exceeds the first threshold, air enters the sealed space through the first channel 131, and when the pressure difference between the second port 122 and the first port 121 exceeds the second threshold, the sealed space exhausts air out through the second channel 14).

[0072] Additionally, the first spring 11 can be positioned near either the first port 121 or the second port 122. When the first spring 11 is positioned near the second port 122, it is in a stretched state when the vent plug 10 is closed. Furthermore, the first spring 11 is further stretched when the second channel 14 is open. When the first spring 11 is positioned near the first port 121, it is in a compressed state when the vent plug 10 is closed. Furthermore, the first spring 11 is further compressed when the second channel 14 is open. Figure 1 , Figure 3 and Figure 4 As shown.

[0073] In this embodiment, by setting the vent plug 10 with the above-described structure, when the pressure difference between the first port 121 and the second port 122 exceeds a first threshold, ventilation can be carried out through the first channel 131 to balance the internal and external air pressures. When the pressure difference between the second port 122 and the first port 121 exceeds the first threshold, ventilation can be carried out through the second channel 14 to balance the internal and external air pressures. This allows the vent plug 10 to open bidirectionally, enabling ventilation in the sealed space under various operating conditions. This helps maintain a relative balance between the internal and external air pressures of the sealed space, thereby improving the sealing performance of the sealed space and the working efficiency of related devices.

[0074] Furthermore, using a one-way valve 13 as the control for one of the ventilation channels of the vent plug 10 can improve the integration of the relevant components controlling one ventilation channel of the vent plug 10. This allows the relevant components of the first channel 131 to be assembled and debugged first, and then assembled with the other components of the vent plug 10 before debugging the relevant parameters of the second channel 14. This improves the ease of assembly of the vent plug 10.

[0075] Please see Figures 1 to 4 In some embodiments, the vent plug 10 further includes a waterproof and breathable membrane assembly 15. The waterproof and breathable membrane assembly 15 is connected to the plug seat 12 and covers one of the first port 121 and the second port 122 configured to be away from the enclosed space. In this way, ventilation can be allowed through the waterproof and breathable membrane assembly 15 while preventing external moisture or other impurities from entering the interior of the vent plug 10, thus protecting the relevant components from corrosion and facilitating their normal operation.

[0076] It is understood that when the first port 121 is configured to be away from the enclosed space, the waterproof and breathable membrane assembly 15 covers the first port 121.

[0077] Please see Figures 1 to 4 In some embodiments, the waterproof and breathable membrane assembly 15 covers the first port 121. The first port 121 is configured to be away from the enclosed space.

[0078] It is understandable that the second port 122 is located close to the enclosed space, and the first port 121 is connected to the enclosed space through the mounting hole 123 and the second port 122 in sequence.

[0079] In this embodiment, the first port 121 is positioned away from the sealed space, allowing exhaust through the first channel 131 when the internal air pressure is greater than the external air pressure. The first channel 131 is annularly positioned between the one-way valve 13 and the plug seat 12, and its radial dimension is larger than that of the second channel 14. This allows for a larger cross-sectional area for exhaust through the vent plug 10 within the same width, improving exhaust efficiency and quickly alleviating problems such as high stress and poor sealing reliability caused by increased pressure in the sealed space.

[0080] Please see Figure 5 In some embodiments, the waterproof and breathable membrane assembly 15 includes a frame 151 and a waterproof and breathable membrane 152. The frame 151 is connected to the plug seat 12. The frame 151 is provided with a first vent 1511. The waterproof and breathable membrane 152 is connected to the frame 151 and covers the first vent 1511. In this way, the waterproof and breathable membrane assembly 15 has a simple structure and a small number of parts, making it easy to assemble and improving manufacturing efficiency.

[0081] For example, the waterproof and breathable membrane 152 is a polymer material, such as expanded polytetrafluoroethylene (ePTFE). The waterproof and breathable membrane 152 has a microporous structure. This microporous structure allows gas to pass through while blocking liquids and dust from entering.

[0082] For example, the waterproof and breathable membrane 152 is vulcanized with the skeleton 151.

[0083] For example, the skeleton 151 may be made of plastic or metal.

[0084] Please see Figures 1 to 5 In some embodiments, the waterproof and breathable membrane 152 is disposed on the side of the frame 151 near the one-way valve 13. In this way, the waterproof and breathable membrane 152 can be protected by the frame 151, thereby improving the reliability of the waterproof and breathable membrane assembly 15.

[0085] Please see Figure 5 In some embodiments, the skeleton 151 includes a ring 1512 and a sheet 1513. The ring 1512 is connected to the plug seat 12. The sheet 1513 is disposed in the inner hole of the ring 1512. A first vent 1511 is disposed in the sheet 1513. A waterproof and breathable membrane 152 is attached to the sheet 1513. In this way, the overall structure of the skeleton 151 is simple, and the skeleton 151 has a large area for mating with the waterproof and breathable membrane 152, thereby improving the positional stability of the waterproof and breathable membrane 152.

[0086] For example, the ring body 1512 and the sheet body 1513 are integrally disposed.

[0087] Please see Figure 5In some embodiments, the sheet 1513 has an arched structure or a spherical shell structure. This increases the contact area between the skeleton 151 and the waterproof and breathable membrane 152, thereby improving the positional stability of the waterproof and breathable membrane 152 and thus enhancing the reliability of the connection between the skeleton 151 and the waterproof and breathable membrane 152.

[0088] Meanwhile, when the airflow passes through the waterproof and breathable membrane component 15, the contact area between the airflow and the waterproof and breathable membrane component 15 can be increased to disperse the force on the waterproof and breathable membrane component 15, thereby improving the stress state of the waterproof and breathable membrane component 15.

[0089] Specifically, the concave surface of the sheet 1513 faces the one-way valve 13. It can be understood that the vent plug 10 is in the venting state more frequently than in the intake state. When the second port 122 is positioned close to the enclosed space, this arrangement also increases the distance between the waterproof and breathable membrane assembly 15 and the second port 122 during venting, thereby increasing the path of airflow from the second port 122 to the waterproof and breathable membrane assembly 15, and thus reducing the impact of gas on the waterproof and breathable membrane assembly 15.

[0090] Please see Figure 5 and Figure 6 In some embodiments, a drainage groove 1514 is provided at the end of the ring 1512 away from the plug seat 12. The drainage groove 1514 connects the inner and outer sides of the ring 1512. In this way, the waterproof and breathable membrane 152 can be placed in the middle of the ring 1512 to ensure the reliability of the connection between the waterproof and breathable membrane 152 and the ring 1512. At the same time, the drainage groove 1514 can drain the liquid accumulated between the ring 1512 and the waterproof and breathable membrane 152, reducing the obstruction of the waterproof and breathable membrane 152 to ventilation, thereby improving the ventilation efficiency of the vent plug 10.

[0091] Please see Figures 1 to 4 In some embodiments, the vent plug 10 further includes a limiting member 154 and a fixing spring 155. One end of the limiting member 154 is connected to the plug seat 12, and the other end is located on the side of the waterproof and breathable membrane assembly 15 away from the one-way valve 13. Both ends of the fixing spring 155 abut against the waterproof and breathable membrane assembly 15 and the portion of the limiting member 154 located on the side of the waterproof and breathable membrane assembly 15 away from the one-way valve 13, respectively, to hold the waterproof and breathable membrane assembly 15 against the end face of the plug seat 12. In this way, the waterproof and breathable membrane assembly 15 and the plug seat 12 can fit tightly together to ensure their sealing performance, while also making the waterproof and breathable membrane assembly 15 and the plug seat 12 independent of each other, which is beneficial for assembly and maintenance.

[0092] It is understandable that the fixed spring 155 is in a compressed state.

[0093] Please see Figures 1 to 5In some embodiments, the vent plug 10 further includes a first sealing ring 153. The first sealing ring 153 is disposed between the end face of the plug seat 12 and the waterproof and breathable membrane assembly 15. In this way, the sealing performance between the waterproof and breathable membrane assembly 15 and the plug seat 12 can be improved by the first sealing ring 153.

[0094] It is understood that the restoring force of the fixed spring 155 under compression causes the first sealing ring 153 to be under axial compression, thereby making the first sealing ring 153 tightly fit the end face of the plug seat 12 and the waterproof and breathable membrane assembly 15 to fill the gap and block the leakage channel of the medium (liquid, gas).

[0095] Specifically, the first sealing ring 153 is located between the end faces of the ring body 1512 and the plug seat 12.

[0096] Please see Figures 1 to 4 In some embodiments, the vent plug 10 further includes a dust cover 16. The dust cover 16 is configured to be away from one of the first port 121 and the second port 122. The dust cover 16 is fitted onto and connected to the end of the plug seat 12. An exhaust gap is defined between the inner surface of the dust cover 16 and the outer surface of the plug seat 12. In this way, the dust cover 16 can protect the end of the vent plug 10 away from the sealed space and the components located near that end of the vent plug 10, and can prevent external moisture or other impurities from entering the interior of the vent plug 10, thereby protecting the relevant components from corrosion and facilitating their normal operation.

[0097] In some embodiments, the dust cover 16 is riveted to the plug seat 12. This creates a permanent connection between the dust cover 16 and the plug seat 12. This ensures that the dust cover 16 and the plug seat 12 remain connected and are not easily loosened under long-term vibration, shock, or alternating load conditions.

[0098] It is understandable that riveting refers to the local plastic deformation of the dust cover 16 and the plug seat 12, so that the dust cover 16 and the plug seat 12 form an interlocking or meshing structure, thereby fixing the dust cover 16 and the plug seat 12 to each other and making them difficult to separate.

[0099] Please see Figures 1 to 4 In some embodiments, a portion of the outer surface of the plug seat 12 protrudes radially outward to form a first annulus 124. A dust cover 16 is spaced apart from the first annulus 124. Thus, the installation position of the dust cover 16 can be positioned using the first annulus 124, improving assembly efficiency.

[0100] Please see Figure 3In some embodiments, the vent plug 10 further includes a second sealing ring 17. The wall of the mounting hole 123 has a first annular surface 1231. The outer surface of the one-way valve 13 has a second annular surface 132. The second sealing ring 17 is disposed between the first annular surface 1231 and the second annular surface 132, and is sealed to both the first annular surface 1231 and the second annular surface 132. Thus, a sealing fit between the wall of the mounting hole 123 and the one-way valve 13 can be achieved through the second sealing ring 17, thereby improving the reliability of the second channel 14 in the closed state.

[0101] It is understandable that, in addition to setting the second sealing ring 17 to achieve the seal between the one-way valve 13 and the hole wall of the mounting hole 123, the seal can also be achieved through the interference fit of the layout of the one-way valve 13 and the hole wall of the mounting hole 123.

[0102] Please see Figure 3 In some embodiments, both the first annular surface 1231 and the second annular surface 132 are perpendicular to the axis of the mounting hole 123. The second sealing ring 17 is fixed to one of the first annular surface 1231 and the second annular surface 132, and contacts the other. This creates a sealing fit between the check valve 13 and the wall of the mounting hole 123 perpendicular to the axis of the mounting hole, thereby improving the reliability of the sealing fit between the check valve 13 and the wall of the mounting hole 123.

[0103] In addition, the above-mentioned arrangement makes the second channel 14 a bent structure, that is, the second channel 14 is more tortuous. When oil impacts the vent plug 10, the tortuous second channel 14 can play a buffering role, so that the oil cannot contaminate the waterproof and breathable membrane 152.

[0104] Please see Figure 3 In some embodiments, the second sealing ring 17 is connected to the first annular surface 1231 and contacts the second annular surface 132. This keeps the second sealing ring 17 stationary relative to the plug seat 12, thereby improving the positional stability of the second sealing ring 17 and enhancing the sealing reliability between the plug seat 12 and the one-way valve 13.

[0105] Please see Figure 3 In some embodiments, a first stepped groove 1232 is provided on the wall of the mounting hole 123. A second sealing ring 17 is disposed in the first stepped groove 1232 and contacts the circumferential surface of the groove. The bottom surface of the first stepped groove 1232 is a first annular surface 1231. A portion of the outer surface of the one-way valve 13 protrudes radially outward to form a second annular body 135. The second annular body 135 is inserted into the stepped groove. The surface of the second annular body 135 facing the second sealing ring 17 is the second annular surface 132. This increases the mating surface between the plug seat 12 and the second sealing ring 17, improving the positional stability of the second sealing ring 17 and thus ensuring reliable contact between the one-way valve 13 and the second seal.

[0106] Please see Figures 1 to 4 as well as Figure 7 In some embodiments, the one-way valve 13 has a third annular surface 133 that is clearance-fitted with the mounting hole 123. A first air groove 134 is provided on the third annular surface 133, extending axially along the mounting hole 123. This allows for both wire-guided limiting of the movement of the one-way valve 13 by the cooperation between the third annular surface 133 and the mounting hole 123, thereby improving the smoothness of the one-way valve 13's movement, and also increases the ventilation cross-sectional area by the first air groove 134, thereby improving ventilation efficiency.

[0107] Please see Figure 1 , Figure 3 , Figure 4 In some embodiments, the first spring 11 is disposed in the mounting hole 123 and located at the end of the one-way valve 13 near the first port 121. This allows the first spring 11 to deform in a compressive manner, thereby improving the ease of assembly of the vent plug 10.

[0108] Please see Figures 1 to 4 In some embodiments, the vent plug 10 further includes a washer 18. The washer 18 is located in the mounting hole 123 and is connected to the wall of the mounting hole 123. The end of the first spring 11 away from the one-way valve 13 abuts against the washer 18. In this way, the ease of machining of the mounting hole 123 can be ensured, and the connection between the first spring 11 and the plug seat 12 can be simplified and easily assembled.

[0109] Specifically, washer 18 is a flat washer.

[0110] Please see Figures 1 to 4 In some embodiments, the vent plug 10 further includes an open retaining ring 19. A second stepped groove 1233 is provided on the wall of the mounting hole 123. A retaining groove 1234 is provided on the circumferential surface of the second stepped groove 1233. The outer periphery of the open retaining ring 19 is inserted into the retaining groove 1234. A washer 18 is disposed in the second stepped groove 1233 and is located between the open retaining ring 19 and the first spring 11. In this way, the washer 18 can be detachably installed in the mounting hole 123 through the open retaining ring 19, thereby improving the ease of assembly and subsequent maintenance of the vent plug 10.

[0111] Please see Figures 1 to 4 In some embodiments, a portion of the outer surface of the one-way valve 13 protrudes radially outward to form a second ring 135. The end of the first spring 11 near the one-way valve 13 is sleeved on the end of the one-way valve 13 and abuts against the second ring 135. This increases the mating area between the first spring 11 and the one-way valve 13, and also guides the compression deformation of the first spring 11 through the end of the one-way valve 13, thereby improving the smoothness of the compression deformation of the first spring 11.

[0112] Please see Figures 1 to 4 In some embodiments, the one-way valve 13 includes a valve body 136, a spring seat 137, a valve core 138, and a second spring 139. The valve body 136 is slidably disposed in the mounting hole 123. The valve body 136 has a first through hole 1361. The spring seat 137 is sleeved on one end of the valve body 136 and defines a mounting cavity 1362 between the spring seat 137 and the valve body 136. A second vent 1371 is provided on the portion of the spring seat 137 near the end of the valve body 136. The second vent 1371 communicates with the mounting cavity 1362. The valve core 138 is disposed in the mounting cavity 1362 and contacts the end face of the valve body 136. The second spring 139 is disposed in the mounting cavity 1362 and abuts against the valve core 138 and the spring seat 137. The first through hole 1361 is a first channel 131; the outer peripheral surface of the valve body 136 and the outer peripheral surface of the spring seat 137 are spaced apart from the hole wall of the mounting hole 123 to define a second channel 14. This makes the one-way valve 13 simple in structure, with few parts and easy to assemble.

[0113] Furthermore, the first channel 131 defined by the first through hole 1361 extends axially, while the first channel 131 defined between the valve body 136 and the valve core 138 extends radially. The end of the second vent 1371 opposite to the first through hole 1361 communicates with the gap between the wall of the one-way valve 13 and the mounting hole 123. This results in the first channel 131 having multiple inflection points, making it tortuous. This allows it to buffer the impact of oil against the vent plug 10, effectively preventing oil contamination of the waterproof and breathable membrane 152.

[0114] Please see Figures 1 to 4 In some embodiments, the one-way valve 13 further includes a valve stem 1381. One end of the valve stem 1381 is connected to the valve core 138, and the other end extends into the first through hole 1361. A portion of the outer surface of the valve stem 1381 is spaced apart from the wall of the first through hole 1361 to define a first channel 131, and another portion of the outer surface contacts the wall of the first through hole 1361.

[0115] It is understood that during the movement of the valve core 138 relative to the valve body 136, the valve stem 1381 remains within the first through hole 1361. Thus, the movement of the valve core 138 can be constrained by the cooperation between the valve stem 1381 and the first through hole 1361, preventing abnormal movement of the valve core 138 and making the sealing structure of the one-way valve 13 more stable and reliable.

[0116] Please see Figure 8In some embodiments, a second air groove 1382 is provided on the valve stem 1381. The second air groove 1382 extends axially along the valve stem 1381 and penetrates the end face of the valve stem 1381 away from the valve core 138. In this way, the air passage cross-sectional area can be increased through the second air groove 1382 to improve the air passage efficiency.

[0117] Please see Figures 1 to 4 In some embodiments, a third vent 1372 is provided at the end of the spring seat 137 opposite to the valve body 136. In this way, when air is supplied from the second port 122 to the first port 121, the force-bearing area of ​​the gas from the second port 122 acting on the one-way valve 13 can be increased, so as to facilitate the smooth movement of the one-way valve 13 and thus open the second channel 14.

[0118] In addition, when there is a gap between the valve core 138 and the spring seat 137, the third vent 1372 can also be used to vent air to the second port 122.

[0119] In some embodiments, the valve stem 1381 is made of metal. This improves the strength and wear resistance of the valve stem 1381, thereby enhancing the reliability of the vent plug 10.

[0120] Please see Figures 1 to 4 In some embodiments, the one-way valve 13 further includes a third sealing ring 130, which is disposed between the valve core 138 and the valve body 136. Thus, the third sealing ring 130 can achieve a sealing fit between the valve body 136 and the valve core 138, thereby improving the reliability of the first channel 131 in the closed state.

[0121] It is understandable that, in addition to setting a third sealing ring 130 to achieve sealing between the valve body 136 and the valve core 138, sealing can also be achieved through the interference fit of the layout of the valve body 136 and the valve core 138.

[0122] In some embodiments, the spring seat 137 is riveted to the valve body 136. This creates a permanent connection between the spring seat 137 and the valve body 136. This ensures that the connection between the spring seat 137 and the valve body 136 remains secure and does not easily loosen under long-term vibration, shock, or alternating load conditions.

[0123] It is understandable that riveting refers to the local plastic deformation of the spring seat 137 and the valve body 136, so that the spring seat 137 and the valve body 136 form an interlocking or meshing structure, thereby fixing the spring seat 137 and the valve body 136 to each other and making them difficult to separate.

[0124] Please see Figures 1 to 4In some embodiments, a third stepped groove 125 is provided at one end of the outer surface of the plug seat 12 to define a mounting portion at one end of the plug seat 12. The mounting portion is configured to define a component connection that defines a sealed space. In this way, the interface required for the vent plug 10 to connect with the corresponding component is smaller, thereby reducing the amount of material used in the vent plug 10.

[0125] It is understood that when the vent plug 10 is not in operation, the first sealing ring 153, the second sealing ring 17, and the third sealing ring 130 all remain sealed, that is, the vent plug 10 is in the closed state. When the hydraulic system using the vent plug 10 is tilted, it can ensure that there is no oil leakage at the vent plug 10.

[0126] For example, the connection between the mounting part and the corresponding component can be designed as a threaded connection or a bamboo-joint connection. The accompanying drawings of this embodiment show a bamboo-joint connection structure.

[0127] The vent plug 10 can be opened in both directions. Its working process is divided into an air intake process and an air intake process. Based on the above embodiment, the bidirectional opening of the vent plug 10 is described in detail below.

[0128] The venting process of vent plug 10: as follows Figure 3 As shown, the opening pressure of the vent plug 10 is mainly determined by the elastic force of the first spring 11. That is, the opening pressure of the vent plug 10 during the exhaust process (i.e., the size of the second threshold) can be adjusted by adjusting the elastic force of the first spring 11. When the internal air pressure of the vent plug 10 (i.e., the air pressure in the closed space) is greater than the external air pressure, and the thrust of the air pressure difference on the one-way valve 13 is greater than the elastic force of the first spring 11, the one-way valve 13 moves to the first port 121, the one-way valve 13 does not contact the second sealing ring 17, and the second channel 14 is in the open state. After the second channel 14 is opened, the gas inside the vent plug 10 can be discharged sequentially through the second port 122, a portion of the second channel 14 defined between the end of the one-way valve 13 near the second port 122 and the wall of the mounting hole 123 (mainly the first air groove 134), the gap between the one-way valve 13 and the second sealing ring 17, another portion of the second channel 14 defined between the end of the one-way valve 13 near the first port 121 and the wall of the mounting hole 123, the gasket 18, the opening retaining ring 19, the waterproof and breathable membrane assembly 15, the dust cover 16, and the gap between the plug seat 12. This tortuous exhaust path can prevent oil from splashing onto the waterproof and breathable membrane assembly 15, thereby effectively preventing the waterproof and breathable membrane assembly 15 from being contaminated. When the pressure difference between the inside and outside of the vent plug 10 is lower than the opening pressure of the vent plug 10 (i.e., the second threshold), the one-way valve 13 contacts the second sealing ring 17 under the elastic force of the first spring 11 to form a seal, and the second channel 14 is closed. At this time, the vent plug 10 is in the closed state.

[0129] Air intake process of vent plug 10: as follows Figure 4As shown, the opening pressure of the vent plug 10 is mainly determined by the second spring 139. That is, the opening pressure (i.e., the first threshold) of the air intake process can be adjusted by adjusting the elastic force of the second spring 139. When the external air pressure of the vent plug 10 is greater than the internal air pressure, and the thrust of the air pressure difference on the valve stem 1381 and the valve core 138 is greater than the elastic force of the second spring 139, the valve stem 1381 and the valve core 138 move towards the second opening along the axial direction and compress the second spring 139 until the valve core 138 moves away from the valve body 136, so as to form a gap between the third sealing ring 130 and the valve body 136. After the one-way valve 13 is opened, the first channel 131 is open, allowing external gas to pass sequentially through the gap between the dust cover 16 and the plug seat 12, the waterproof and breathable membrane assembly 15, the opening retaining ring 19, the gasket 18, the gap between the first through hole 1361 and the valve stem 1381 (mainly the second air groove 1382), the gap between the third sealing ring 130 and the valve body 136, the second air hole 1371, the gap between the end of the one-way valve 13 near the second port 122 and the wall of the mounting hole 123, and the second port 122 into the sealed space, thereby reducing the pressure difference between the sealed space and the external atmosphere. This tortuous air intake path prevents oil from splashing onto the waterproof and breathable membrane assembly 15, thus effectively preventing contamination of the waterproof and breathable membrane assembly 15. When the pressure difference between the inside and outside of the vent plug 10 is lower than the opening pressure of the vent plug 10 (i.e., the first threshold), the valve stem 1381 and the valve core 138, under the elastic force of the second spring 139, drive the third sealing ring 130 to move towards the valve body 136 until the third sealing ring 130 contacts the valve body 136 to form a seal, and the first channel 131 is closed. At this time, the vent plug 10 is in the closed state.

[0130] This vent plug 10 has a bidirectional opening structure and is suitable for mechanical or hydraulic systems. When the internal air pressure of the vent plug 10 is greater than the external air pressure and the pressure difference is greater than the opening pressure of the vent plug 10, the vent plug 10 opens, allowing air to be released to the external environment. When the internal air pressure of the vent plug 10 is less than the external air pressure and the pressure difference is greater than the opening pressure of the vent plug 10, the vent plug 10 opens, allowing air to be introduced into the system. The bidirectional opening function of the vent plug 10 ensures that the system using this vent plug can maintain a relative balance with the external air pressure under various operating conditions.

[0131] Furthermore, the bidirectional opening pressure of the vent plug 10 is determined by the first spring 11 and the one-way valve 13 respectively, and the two do not affect each other, so the opening pressure in each direction can be controlled more precisely.

[0132] The waterproof, dustproof, and oil-leakage-proof design of this vent plug 10 consists of two parts: preventing external moisture and impurities from entering the vent plug 10 and preventing oil leakage from the vent plug 10 and contamination of the waterproof and breathable membrane 152. Specific details are as follows.

[0133] Explanation of measures to prevent external moisture and impurities from entering the vent plug 10: The dust cover 16 is riveted to the plug seat 12, forming a gap for ventilation, which effectively prevents larger particles of impurities from entering the vent plug 10. The waterproof and breathable membrane assembly 15 is sealed to the end face of the plug seat 12 to prevent moisture and small particles of impurities from entering the vent plug 10. Drainage grooves 1514 are provided on the frame 151 of the waterproof and breathable membrane assembly 15 to prevent water droplets from accumulating on the waterproof and breathable membrane 152.

[0134] Explanation of preventing internal oil leakage and contamination of the waterproof and breathable membrane 152: When the vent plug 10 is not in operation, the first channel 131 is closed (the one-way valve 13 is normally closed and the system oil impact cannot open the one-way valve 13) and the second channel 14 is also closed, thereby preventing system oil leakage and oil contamination of the waterproof and breathable membrane 152. When the vent plug 10 is in operation (i.e., the vent plug 10 is open, causing the first channel 131 or the second channel 14 to open), the path design of the first channel 131 and the second channel 14 is relatively tortuous. When oil impacts into the vent plug 10, the tortuous path design can act as a buffer, increasing the oil flow resistance, thereby effectively preventing oil contamination of the waterproof and breathable membrane 152.

[0135] Please see Figure 9 Secondly, embodiments of this application provide an oil reservoir 20, which includes the aforementioned vent plug 10.

[0136] It is understood that the oil can 20 includes a housing 21, and one end of the stopper seat 12 is inserted into the housing 21.

[0137] Specifically, the end of the plug seat 12 near the second port 122 is inserted into the outer casing 21, and the second port 122 is connected to the oil cavity of the outer casing 21.

[0138] It is understood that the oil container 20 includes the aforementioned vent plug 10, and the oil container 20 has all the beneficial effects of the aforementioned vent plug 10, which will not be repeated here.

[0139] Thirdly, embodiments of this application provide a suspension system including the aforementioned oil reservoir 20.

[0140] It is understood that the suspension system includes the aforementioned vent plug 10, and the suspension system has all the beneficial effects of the aforementioned vent plug 10, which will not be repeated here.

[0141] Fourthly, embodiments of this application provide a transmission that includes the aforementioned vent plug 10.

[0142] It is understood that the transmission includes the aforementioned vent plug 10, and the transmission has all the beneficial effects of the aforementioned vent plug 10, which will not be repeated here.

[0143] Fifthly, embodiments of this application provide a vehicle that includes at least one of the aforementioned vent plug 10, the aforementioned suspension system, and the aforementioned transmission.

[0144] It is understood that the vehicle may be a gasoline-powered vehicle, a plug-in hybrid electric vehicle, or a new energy vehicle, etc., and this disclosure does not make any specific restrictions.

[0145] It is understood that the vehicle includes the aforementioned vent plug 10 and has all the beneficial effects of the aforementioned vent plug 10, which will not be repeated here.

[0146] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0147] In the description of this application, it should be noted that, unless otherwise expressly 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0148] The terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a product that comprises a list of elements includes not only those elements but also other elements not expressly listed or inherent to such a product.

[0149] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0150] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0151] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A vent plug (10), characterized in that, include: The plug seat (12) has a first port (121), a mounting hole (123), and a second port (122) connected in sequence; A one-way valve (13) is slidably disposed in the mounting hole (123), the one-way valve (13) having a first channel (131), and a second channel (14) defined between the outer surface of the one-way valve (13) and the wall of the mounting hole (123); and The first spring (11) is connected at both ends to the plug seat (12) and the one-way valve (13), respectively; The first channel (131) is configured to be turned on when the pressure difference between the first port (121) and the second port (122) exceeds a first threshold, and the second channel (14) is configured to be turned on when the pressure difference between the second port (122) and the first port (121) exceeds a second threshold.

2. The vent plug (10) according to claim 1, characterized in that, The vent plug (10) further includes a waterproof and breathable membrane assembly (15) connected to the plug seat (12) and covering one of the first port (121) and the second port (122) configured to be away from the enclosed space.

3. The vent plug (10) according to claim 2, characterized in that, The waterproof and breathable membrane assembly (15) covers the first port (121), which is configured to be away from the enclosed space.

4. The vent plug (10) according to claim 2, characterized in that, The waterproof and breathable membrane assembly (15) includes: A frame (151) is connected to the plug seat (12), and the frame (151) is provided with a first air hole (1511); and A waterproof and breathable membrane (152) is connected to the skeleton (151) and covers the first air hole (1511).

5. The vent plug (10) according to claim 4, characterized in that, The waterproof and breathable membrane (152) is disposed on the side of the frame (151) near the one-way valve (13).

6. The vent plug (10) according to claim 4, characterized in that, The skeleton (151) includes a ring (1512) and a sheet (1513). The ring (1512) is connected to the plug seat (12). The sheet (1513) is disposed in the inner hole of the ring (1512). The first air hole (1511) is disposed on the sheet (1513). The waterproof and breathable membrane (152) is attached to the sheet (1513).

7. The vent plug (10) according to claim 6, characterized in that, The sheet (1513) has an arched structure or a spherical shell structure.

8. The vent plug (10) according to claim 6, characterized in that, A drainage groove (1514) is provided at one end of the ring body (1512) away from the plug seat (12), and the drainage groove (1514) connects the inner side and the outer side of the ring body (1512).

9. The vent plug (10) according to any one of claims 2-8, characterized in that, The vent plug (10) also includes a limiting member (154) and a fixing spring (155). One end of the limiting member (154) is connected to the plug seat (12), and the other end is located on the side of the waterproof and breathable membrane assembly (15) away from the one-way valve (13). The two ends of the fixed spring (155) respectively abut against the waterproof and breathable membrane assembly (15) and the limiting member (154) on the side of the waterproof and breathable membrane assembly (15) away from the one-way valve (13), so as to hold the waterproof and breathable membrane assembly (15) against the end face of the plug seat (12).

10. The vent plug (10) according to claim 9, characterized in that, The vent plug (10) also includes a first sealing ring (153), which is disposed between the end face of the plug seat (12) and the waterproof and breathable membrane assembly (15).

11. The vent plug (10) according to any one of claims 1-8, characterized in that, The vent plug (10) also includes a dust cover (16), which is located near the first port (121) and the second port (122) and is configured to be away from the enclosed space. The dust cover (16) is sleeved on the end of the plug seat (12) and connected to the plug seat (12). An exhaust gap is defined between the inner surface of the dust cover (16) and the outer surface of the plug seat (12).

12. The vent plug (10) according to claim 11, characterized in that, The dust cover (16) is riveted to the plug seat (12).

13. The vent plug (10) according to claim 12, characterized in that, A portion of the outer surface of the plug seat (12) protrudes radially to form a first ring body (124), and the dust cover (16) is spaced apart from the first ring body (124).

14. The vent plug (10) according to any one of claims 1-8, characterized in that, The vent plug (10) also includes a second sealing ring (17). The wall of the mounting hole (123) has a first annular surface (1231), and the outer surface of the one-way valve (13) has a second annular surface (132). The second sealing ring (17) is disposed between the first annular surface (1231) and the second annular surface (132) and is sealed to the first annular surface (1231) and the second annular surface (132).

15. The vent plug (10) according to claim 14, characterized in that, The first annular surface (1231) and the second annular surface (132) are both perpendicular to the axis of the mounting hole (123). The second sealing ring (17) is fixed to one of the first annular surface (1231) and the second annular surface (132) and contacts the other.

16. The vent plug (10) according to claim 15, characterized in that, The second sealing ring (17) is connected to the first annular surface (1231) and contacts the second annular surface (132).

17. The vent plug (10) according to claim 15, characterized in that, A first stepped groove (1232) is provided on the wall of the mounting hole (123), and the second sealing ring (17) is disposed in the first stepped groove (1232) and contacts the groove circumferential surface of the first stepped groove (1232). The bottom surface of the first stepped groove (1232) is the first annular surface (1231). A portion of the outer surface of the one-way valve (13) protrudes radially to form a second ring (135), the second ring (135) is inserted into the stepped groove, and the surface of the second ring (135) facing the second sealing ring (17) is the second annular surface (132).

18. The vent plug (10) according to any one of claims 1-8, characterized in that, The one-way valve (13) has a third annular surface (133) that is clearance-fitted with the mounting hole (123), and a first air groove (134) is provided on the third annular surface (133), the first air groove (134) extending along the axial direction of the mounting hole (123).

19. The vent plug (10) according to any one of claims 1-8, characterized in that, The first spring (11) is disposed in the mounting hole (123) and located at the end of the one-way valve (13) near the first port (121).

20. The vent plug (10) according to claim 19, characterized in that, The vent plug (10) also includes a washer (18), which is located in the mounting hole (123) and connected to the hole wall of the mounting hole (123). The end of the first spring (11) away from the one-way valve (13) abuts against the washer (18).

21. The vent plug (10) according to claim 20, characterized in that, The vent plug (10) also includes an open retaining ring (19). A second stepped groove (1233) is provided on the wall of the mounting hole (123). A retaining groove (1234) is provided on the circumferential surface of the second stepped groove (1233). The outer periphery of the open retaining ring (19) is inserted into the retaining groove (1234). The washer (18) is disposed in the second stepped groove (1233) and located between the open retaining ring (19) and the first spring (11).

22. The vent plug (10) according to claim 19, characterized in that, A portion of the outer surface of the one-way valve (13) protrudes radially to form a second ring (135), and the end of the first spring (11) near the one-way valve (13) is sleeved on the end of the one-way valve (13) and abuts against the second ring (135).

23. The vent plug (10) according to any one of claims 1-8, characterized in that, The one-way valve (13) includes: The valve body (136) is slidably disposed in the mounting hole (123), and the valve body (136) has a first through hole (1361); A spring seat (137) is sleeved on one end of the valve body (136) and defines an installation cavity (1362) between the spring seat (137) and the valve body (136). A second air hole (1371) is provided on the part of the spring seat (137) near the end of the valve body (136), and the second air hole (1371) communicates with the installation cavity (1362). A valve core (138) is disposed in the mounting cavity (1362) and contacts the end face of the valve body (136); and The second spring (139) is disposed in the mounting cavity (1362) and abuts against the valve core (138) and the spring seat (137); Wherein, the first through hole (1361) is the first channel (131); The outer peripheral surface of the valve body (136) and the outer peripheral surface of the spring seat (137) are spaced apart from the wall of the mounting hole (123) to define the second channel (14).

24. The vent plug (10) according to claim 23, characterized in that, The one-way valve (13) also includes a valve stem (1381), one end of which is connected to the valve core (138), and the other end extends into the first through hole (1361). A portion of the outer surface of the valve stem (1381) is spaced apart from the hole wall of the first through hole (1361) to define the first channel (131), and another portion of the outer surface is in contact with the hole wall of the first through hole (1361).

25. The vent plug (10) according to claim 24, characterized in that, A second air groove (1382) is provided on the valve stem (1381). The second air groove (1382) extends along the axial direction of the valve stem (1381) and penetrates the end face of the valve stem (1381) away from the valve core (138).

26. The vent plug (10) according to claim 24, characterized in that, A third air hole (1372) is provided at the end of the spring seat (137) opposite to the valve body (136); And / or, the valve stem (1381) is made of metal.

27. The vent plug (10) according to claim 23, characterized in that, The one-way valve (13) also includes a third sealing ring (130), which is disposed between the valve core (138) and the valve body (136).

28. The vent plug (10) according to claim 23, characterized in that, The spring seat (137) is riveted to the valve body (136).

29. The vent plug (10) according to any one of claims 1-8, characterized in that, A third stepped groove (125) is provided at one end of the outer surface of the plug seat (12) to define a mounting portion at one end of the plug seat (12), the mounting portion being configured to define a component connection for a sealed space.

30. An oil dispenser (20), characterized in that, Includes the vent plug (10) as described in any one of claims 1-29.

31. A suspension system, characterized in that, Includes the oil container (20) as described in claim 30.

32. A transmission, characterized in that, Includes the vent plug (10) as described in any one of claims 1-29.

33. A vehicle, characterized in that, It includes at least one of the vent plug (10) as described in any one of claims 1-29, the suspension system as described in claim 31, and the transmission as described in claim 32.

Images