Breathable valve and shell assembly

Abstract

The utility model discloses a ventilation valve, which comprises a valve body, a valve core, a valve core, a valve core, a valve core, a valve core, a valve core, a valve core, a valve core and a valve core, the valve cover is arranged on the main body part, and a ventilation area is formed between the valve cover and the main body part; the waterproof breathable film is hermetically fixed on the end face, deviating from the mounting part, of the main body part and covers the breathable channel; the mounting part comprises limiting pieces and clamping jaws which are arranged at intervals in the circumferential direction of the ventilation channel, the outer side faces of the clamping jaws protrude outwards in the radial direction to form clamping protruding parts, and the clamping protruding parts protrude out of the outer side faces of the limiting pieces in the radial direction. The utility model also discloses a housing assembly. Under the inclined installation working condition, in the process that the ventilation valve is pressed towards the direction of the shell, the clamping protruding part can make contact with and abut against the inner wall of the shell installation opening firstly, and after the limiting piece makes contact with the inner wall of the shell installation opening, the eccentricity or the inclined degree of the valve body relative to the shell can be controlled; and further, the radial inward deformation amplitude of the clamping jaws is limited, and the clamping jaws are prevented from being squeezed to be broken.

Description

TECHNICAL FIELD

[0001] The utility model relates to waterproof and breathable technical field especially, it relates to a vent valve and shell assembly. BACKGROUND

[0002] The installation part of the existing vent valve body is a structure with external threads, the installation part of this structure is stable after installation, but it is not suitable for inclined installation scenes, and the installation is time-consuming.

[0003] In addition, the utility model patent CN221569550U discloses a vent valve, and the installation part thereof is a plurality of circumferentially spaced claw type structures, the outer wall of the end of each claw is provided with a clamping protrusion for clamping with the shell, the installation part of this structure makes the installation of the vent valve convenient and fast, and the vent valve can be pressed down to be installed.

[0004] Therefore, the structure of the installation part needs to be further improved to solve the problems of time-consuming installation, unsuitability for inclined installation and easy breakage of some claws due to excessive deformation during inclined installation of the existing vent valve. SUMMARY

[0005] In order to overcome the shortcomings of the prior art, the utility model provides a vent valve and shell assembly, the deformation amplitude of the claw is limited by the limiting piece, and the claw is prevented from being broken under inclined installation conditions.

[0006] The technical scheme adopted by the utility model to solve the technical problems is:

[0007] The vent valve comprises,

[0008] The valve body comprises a main body part and an installation part connected thereto, and forms a ventilation passage through the main body part and the installation part;

[0009] The valve cover is arranged at one end of the main body part away from the installation part and forms a ventilation area with the main body part;

[0010] The waterproof and breathable membrane is sealingly fixed to the end face of the main body part away from the installation part and covers the ventilation passage;

[0011] The mounting portion comprises a limiting piece and a clamping jaw which are arranged circumferentially and spaced apart around the air passage, and the outer side surface of the clamping jaw protrudes radially outward to form a clamping protrusion.

[0012] Limited by the actual situation of the shell, the air vent valve is positioned eccentrically or obliquely, and in the initial stage of installation, the air vent valve is pressed towards the shell, and because the outer side surface of the clamping jaw has the clamping protrusion, the maximum outer diameter of the clamping protrusion is greater than the maximum outer diameter of the limiting piece, therefore, the clamping protrusion will first contact and abut against the inner wall of the mounting port of the shell, at this time, the limiting piece does not contact the inner wall of the mounting port, the clamping protrusion is pressed radially inward, only the clamping jaw deforms radially inward as a whole, and the eccentricity or obliquity of the valve body relative to the shell will be increased synchronously, when the clamping jaw is pressed as a whole to the extent that the outer wall of the clamping protrusion is flush with the outer wall of the limiting piece, the inner wall of the mounting port of the shell will also contact and abut against the outer wall of the limiting piece, the limiting piece can control the eccentricity or obliquity of the valve body relative to the shell, thereby limiting the deformation amplitude of the clamping jaw radially inward, preventing the clamping jaw from being pressed excessively, and avoiding the clamping jaw from being broken; in addition, because the air vent valve is inserted and installed initially, only the clamping protrusion of the outer wall of the clamping jaw is pressed by the mounting port of the shell, that is, the limiting piece is not pressed, so that the force required to be applied at the initial stage of insertion of the air vent valve can be reduced.

[0013] Further, the limiting piece is a columnar member, or the limiting piece has an arc-shaped outer wall for cooperating with the inner wall of the mounting port of the shell.

[0014] When the limiting piece is a columnar member, after the air vent valve is inserted into the shell to a certain extent, the limiting piece forms a line contact with the mounting port, the contact area is small, at this time, the circumferential gap between the limiting piece and the clamping jaw is large, which provides sufficient space for the stress deformation of the clamping jaw; when the limiting piece has an arc-shaped outer wall, after the air vent valve is inserted into the shell to a certain extent, the arc-shaped outer wall of the limiting piece forms a surface contact with the inner wall of the mounting port, the contact area is large, at this time, it can better limit the eccentricity or obliquity of the valve body relative to the shell, thereby preventing the deformation of the clamping jaw radially inward from being excessive.

[0015] Further, the maximum distance between the outer side surface of the clamping protrusion and the central axis of the valve body is D1, the maximum distance between the outer side surface of the limiting piece and the central axis of the valve body is D2, and D1 / D2 is 1.1-1.3.

[0016] If the D1 / D2 ratio is less than 1.1, it means that the radial width of the clamping protrusion protruding out of the outer side of the limiting piece is too small. When the clamping protrusion is squeezed by the shell mounting port, the clamping jaw deforms slightly, and then the clamping jaw and the limiting piece are in contact with and abut against the inner wall of the mounting port. The deformation of the clamping jaw is too small, which cannot meet the installation scene of a large inclination angle. At the same time, when the clamping protrusion hooks the outer peripheral position of the mounting port, the contact area between the two is too small, which leads to insufficient clamping strength between the clamping protrusion and the shell, and the installation firmness cannot be guaranteed. If the D1 / D2 ratio is greater than 1.3, it means that the radial width of the clamping protrusion protruding out of the outer side of the limiting piece is too large. Before the outer wall of the mounting port contacts the limiting piece, the clamping jaw deforms too much, and the clamping jaw deforms too much and is prone to breakage. The clamping jaw may have been broken before the limiting piece plays a role. Within the above ratio range, the clamping jaw has an appropriate deformation amplitude, avoids excessive deformation and breakage, and the firmness of the clamping protrusion and the shell after installation is considered.

[0017] Further, the clamping jaw is in the shape of a circular arc, and the corresponding central angle is A1. The limiting piece is in the shape of a circular arc, and the corresponding central angle is A2. A1 / A2 is 1.2-2.5.

[0018] If the A1 / A2 ratio is less than 1.2, it means that the circumferential length of the clamping jaw is too small. At this time, the circumferential length of the clamping protrusion on the clamping jaw is also too small, so that the contact area between the clamping protrusion and the shell is too small after installation, leading to insufficient clamping strength between the two. If the A1 / A2 ratio is greater than 2.5, it means that the circumferential length of the limiting piece is too small. At this time, the limiting piece does not play a sufficient role in controlling the eccentricity or inclination of the valve body relative to the shell, and thus the deformation amplitude of the clamping jaw is insufficiently limited, which may lead to a situation where the clamping jaw continues to deform greatly and breaks. Within the above ratio range, the clamping jaw avoids excessive deformation, and the firmness of the clamping protrusion and the shell after installation is considered.

[0019] Further, the installation part further comprises a connecting part surrounding the air passage, the connecting part is in the shape of a hollow column, and is connected with the main body part. The limiting piece and the clamping jaw are arranged at the end of the connecting part.

[0020] The connecting part extends continuously in the circumferential direction, ensuring the structural stability of the installation part as a whole, and also ensuring the connection strength between the clamping jaw and the limiting piece and the main body part, avoiding easy breakage of the starting end of the clamping jaw and the limiting piece.

[0021] Further, the circumferential length of the limiting piece gradually decreases from the starting end connected with the connecting part to the end, so that the circumferential gap between the limiting piece and the clamping jaw gradually increases.

[0022] In this way, the circumferential gap of the limiting piece and the pawl gradually increases from bottom to top, providing sufficient deformation space for the force deformation of the pawl, and the end of the pawl can deform more when the clamping protrusion is pressed against the mounting port, facilitating the installation of the breather valve and the shell, and avoiding interference between the end of the pawl and the end of the limiting piece due to the small gap. The circumferential length of the starting end of the limiting piece is larger, which ensures that the limiting piece and the connecting part have sufficient connection strength, and the limiting piece has greater mechanical strength, which is conducive to the effective control of the eccentricity or inclination of the valve body relative to the shell, thereby limiting the further radial inward deformation of the pawl and avoiding the pawl being broken.

[0023] Further, the number of the pawl and the limiting piece is equal, and each has at least two, and they are circumferentially staggered.

[0024] In this way, the distribution of the pawl and the limiting piece is more reasonable. In the inclined installation condition, any pawl first contacts the mounting port and is limited by the circumferentially adjacent limiting piece to prevent excessive deformation, effectively avoiding the breakage of any pawl. After installation, the pawls are evenly distributed in a circumferential circle of the mounting port, and the elastic deformation of the circumferential circle after being pressed is relatively balanced, the clamping between the pawl and the shell is more stable, and the connection between the breather valve and the shell is more stable.

[0025] Further, the pawl extends in a direction deviating from the central axis, and the limiting piece extends in an axial direction.

[0026] The pawl is slightly inclined outward, and the inclined pawl can deform more during installation, making the installation of the breather valve more labor-saving. Even in the scenario where the size of the mounting port is slightly smaller than the initial size of the plurality of pawls, the breather valve can be quickly clamped into the mounting port in a more labor-saving manner. The limiting piece extends in an axial direction to ensure its structural stability and prevent it from deforming significantly under stress, ensuring that the limiting piece can effectively limit the eccentricity or inclination of the valve body relative to the shell.

[0027] Further, the pawl includes a first positioning segment at one end of the clamping protrusion away from the main body, and the first positioning segment extends in an axial direction. The limiting piece includes a second positioning segment axially corresponding to the first positioning segment.

[0028] In the condition that the installation space can meet the vertical installation of the breather valve relative to the shell, in the initial stage of vertical insertion and installation of the breather valve, the first positioning segment and the second positioning segment are inserted into the mounting port of the shell first, so that the valve body is vertically positioned relative to the shell, facilitating further insertion and installation operation, and also facilitating the vertical installation of the valve body.

[0029] This utility model also discloses a housing assembly, including a housing with a mounting port, a vent valve as described above, and a sealing ring sleeved on the outer periphery of the mounting portion. The vent valve is installed at the mounting port, and the sealing ring is engaged between the valve body and the housing. The sealing ring is compressed by the surface of the main body facing the sealing ring and the area of ​​the housing located on the outer periphery of the mounting port. The limiting member is in contact with or radially separated from the inner wall of the mounting port.

[0030] This design ensures stable and reliable sealing performance, guaranteeing effective sealing between the vent valve and the housing mounting port, and making the installation of the vent valve labor-saving, convenient, and quick.

[0031] The beneficial effects of this utility model are as follows: In the initial installation stage when the vent valve is eccentrically or tilted, during the process of pressing the vent valve towards the housing, the engaging protrusion will first contact and abut against the inner wall of the housing's mounting opening, while the limiting member does not contact the inner wall of the mounting opening. The engaging protrusion is radially squeezed inward, and only the pawl deforms radially inward as a whole. The eccentricity or tilt of the valve body relative to the housing will increase synchronously. When the pawl is squeezed until the outer wall of the engaging protrusion is flush with the outer wall of the limiting member, the inner wall of the housing's mounting opening will also contact and abut against the outer wall of the limiting member. The limiting member can control the eccentricity or tilt of the valve body relative to the housing, thereby limiting the further radial inward deformation of the pawl, preventing the pawl from being excessively squeezed and avoiding breakage. In addition, since only the engaging protrusion on the outer wall of the pawl is squeezed by the housing's mounting opening during the initial insertion and installation of the vent valve, i.e., the limiting member is not squeezed, the initial insertion of the vent valve can be reduced. The required force to be applied during the installation period; the D1 / D2 ratio and A1 / A2 ratio are within a certain range, balancing the appropriate deformation range of the claws to avoid excessive deformation and breakage, and the firmness of the locking protrusion and the housing after installation; the continuous circumferential extension of the connecting part ensures the overall structural stability of the installation part, and also ensures the connection strength between the claws and the limiting part and the main body, preventing the starting ends of the claws and the limiting part from easily breaking; the claws are slightly tilted outward, and during the installation process, the tilted extension of the claws can generate greater deformation, making the installation of the vent valve easier. Even in scenarios where the size of the installation opening is slightly smaller than the initial size formed by multiple claws and tilted installation is required, the vent valve can still be quickly and easily locked into the installation opening; the axial extension of the limiting part ensures its structural stability, prevents it from undergoing large deformation after being subjected to force, and ensures that the limiting part can effectively limit the degree of eccentricity or tilt of the valve body relative to the housing. Attached Figure Description

[0032] Figure 1 This is a perspective view of the vent valve provided in Embodiment 1 of this utility model.

[0033] Figure 2 for Figure 1Side view of the breather valve provided Figure 1 .

[0034] Figure 3 For Figure 1 Side view of the breather valve provided Figure 2 .

[0035] Figure 4 For Figure 1 Sectional view of the breather valve provided.

[0036] Figure 5 For Figure 1 Perspective view of the valve body of the breather valve provided Figure 1 .

[0037] Figure 6 For Figure 1 Perspective view of the valve body of the breather valve provided Figure 2 .

[0038] Figure 7 For Figure 1 Side view of the valve body of the breather valve provided.

[0039] Figure 8 For Figure 1 Sectional view of the valve body of the breather valve provided Figure 1 .

[0040] Figure 9 For Figure 1 Sectional view of the valve body of the breather valve provided Figure 2 .

[0041] Figure 10 For Figure 1 Bottom view of the valve body of the breather valve provided.

[0042] Figure 11 For Figure 1 Top view of the valve body of the breather valve provided.

[0043] Figure 12 For Figure 11 Structure enlargement view of B in the breather valve provided.

[0044] Figure 13 Top view of the valve body of the breather valve provided, and the limiting piece is a columnar member.

[0045] Figure 14 Perspective view of the valve cover provided by the utility model.

[0046] Figure 15 Perspective view of the breather valve provided by the utility model embodiment 3.

[0047] Figure 16 Perspective view of the breather valve provided by the utility model embodiment 4.

[0048] Figure 17 This is a cross-sectional view of the housing assembly provided by this utility model, showing the portion of the housing where the mounting port is located;

[0049] Figure 18 for Figure 1 A schematic diagram showing the initial installation of the vent valve, which is eccentric relative to the housing.

[0050] Figure 19 for Figure 1 The provided diagram shows the initial installation of the vent valve with it tilted relative to the housing.

[0051] Among them, 1-valve body, 2-main body, 21-axial limiting part, 3-mounting part, 31-connecting part, 32-limiting component, 321-second positioning section, 33-claw, 331-first positioning section, 34-clamping protrusion, 341-guide surface, 342-fixing surface, 4-ventilation channel, 5-valve cover, 51-clamping part, 6-ventilation area, 7-sealing ring, 8-shell, 81-mounting port. Detailed Implementation

[0052] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort should fall within the scope of protection of the present invention.

[0053] like Figures 1-4 As shown, the vent valve includes a valve body 1, a valve cover 5, and a waterproof and breathable membrane (not shown in the figure). The valve body 1 includes a main body 2 and a mounting part 3 connected axially, and the valve body 1 forms a venting channel 4 that passes through the main body 2 and the mounting part 3. The mounting part 3 serves to connect with... Figure 17 The device housing 8 shown is fitted with a mounting port 81 to fix the vent valve to the mounting port 81. A valve cover 5 is located at the end of the main body 2 opposite to the mounting part 3, forming a ventilation area 6 between the valve cover 5 and the main body 2. The valve cover 5 also protects the waterproof and breathable membrane. The waterproof and breathable membrane is sealed and fixed to the end face of the main body 2 opposite to the mounting part 3, covering the ventilation channel 4. The ventilation area 6 is connected to the ventilation channel 4 through the waterproof and breathable membrane. This connection refers to the ability to exchange gases, but not to allow liquid flow. The waterproof and breathable membrane is generally made of PTFE microporous membrane.

[0054] like Figures 1-9As shown, the mounting portion 3 comprises a limiting member 32 and a clamping jaw 33 which are circumferentially spaced around the air passage 4, and the outer side of the clamping jaw 33 protrudes radially outward to form a clamping protrusion 34, and the clamping protrusion 34 protrudes radially outward from the outer side of the limiting member 32. In other words, the maximum outer diameter of the clamping protrusion 34 is greater than the maximum outer diameter of the limiting member 32.

[0055] Due to the actual situation of the shell 8, the air vent valve provided by the utility model is positioned eccentrically or obliquely. Here, the air vent valve positioned eccentrically means that, as shown in Figure 18 As shown, the center axis of the mounting port 81 of the shell 8 is O1, and the center axis of the air vent valve is O2, and the line O1 is parallel to the line O2 but does not coincide with the line O2, and the air vent valve is positioned obliquely as shown in Figure 19 As shown, the center axis of the air vent valve is inclined relative to the center axis of the mounting port 81 of the shell 8. In the initial stage of installation, during the process of pressing the air vent valve towards the shell 8, since the outer side of the clamping jaw 33 is provided with the clamping protrusion 34, and the maximum outer diameter of the clamping protrusion 34 is greater than the maximum outer diameter of the limiting member 32, the clamping protrusion 34 will first contact and abut against the inner wall of the mounting port 81 of the shell 8, at this time, the limiting member 32 does not contact the inner wall of the mounting port 81, the clamping protrusion 34 is pressed radially inward, and only the clamping jaw 33 is deformed radially inward as a whole, and the eccentricity or obliqueness of the valve body 1 relative to the shell 8 will be increased synchronously, as shown in Figure 18 and Figure 19 As shown, when the clamping jaw 33 is pressed as a whole to the extent that the outer wall of the clamping protrusion 34 is flush with the outer wall of the limiting member 32, the inner wall of the mounting port 81 of the shell 8 will also contact and abut against the outer wall of the limiting member 32, that is, at this time, the clamping jaw 33 and the limiting member 32 both contact and abut against the inner wall of the mounting port 81, and the limiting member 32 can control the eccentricity or obliqueness of the valve body 1 relative to the shell 8, and further limit the deformation amplitude of the clamping jaw 33 radially inward, thereby effectively preventing the clamping jaw 33 from being pressed excessively and avoiding the clamping jaw 33 from being broken. In addition, since only the clamping protrusion 34 of the outer wall of the clamping jaw 33 is pressed by the mounting port 81 of the shell 8 in the initial stage of insertion and installation, that is, only the clamping jaw 33 is pressed and the limiting member 32 is not pressed, the force required to be applied in the initial stage of insertion of the air vent valve can be reduced.

[0056] Specifically, as shown in Figure 13 In the embodiment 2 of the utility model, the limiting member 32 is a columnar member, which can be a cylindrical structure, or, as shown in Figure 5 , Figure 11 In the embodiment 1 of the utility model, the limiting member 32 is a columnar member, which can be a cylindrical structure, or, as shown in Figures 1-12 , Figure 14In the structure shown in Embodiment 1, the limiting member 32 has an arc-shaped outer wall for engaging with the inner wall of the mounting port 81 of the housing 8. For example, the limiting member 32 is an arc-shaped component. When the limiting member 32 is a columnar component, after the vent valve is inserted into the housing 8 to a certain extent, the limiting member 32 and the mounting port 81 form a line contact. While controlling the excessive deformation of the pawl 33, the contact area between the limiting member 32 and the mounting port 81 is small, resulting in a large circumferential gap between the limiting member 32 and the pawl 33, providing sufficient space for the pawl 33 to deform under stress. When the limiting member 32 has an arc-shaped outer wall for engaging with the inner wall of the mounting port 81 of the housing 8, after the vent valve is inserted into the housing 8 to a certain extent, the limiting member 32 and the mounting port 81 form a surface contact. The contact area is large, which better limits the eccentricity or tilt of the valve body 1 relative to the housing 8, thereby preventing excessive radial inward deformation of the pawl 33.

[0057] by Figure 9 Taking the example shown, the central axis of the valve body 1 is line O. The maximum distance between the outer side of the snap-fit ​​protrusion 34 and the central axis O of the valve body 1 is D1, and the maximum distance between the outer side of the limiting member 32 and the central axis O of the valve body 1 is D2. Then, D1 / D2 is 1.1-1.3. If the ratio of D1 / D2 is less than 1.1, it means that the radial width of the snap-fit ​​protrusion 34 protruding from the outer side of the limiting member 32 is too small. When the mounting port 81 of the housing 8 squeezes the snap-fit ​​protrusion 34, after the claw 33 undergoes a small deformation, both the claw 33 and the limiting member 32 will contact and abut against the inner wall of the mounting port 81. The deformation of the claw 33 is too small, which cannot meet the installation scenario with a large tilt angle. At the same time, when the snap-fit ​​protrusion 34 hooks onto the outer periphery of the mounting port 81, the contact area between the two is too small, resulting in insufficient snap-fit ​​strength between the snap-fit ​​protrusion 34 and the housing 8, and the installation firmness cannot be guaranteed. If the D1 / D2 ratio is greater than 1.3, it indicates that the radial width of the latching protrusion 34 protruding from the outer side of the limiting member 32 is too large. Before the mounting opening 81 contacts the outer wall of the limiting member 32, the latch 33 undergoes excessive deformation. Excessive deformation of the latch 33 can easily lead to breakage, and it is possible that the latch 33 will break before the limiting member 32 can function. Within the above ratio range, a suitable deformation range for the latch 33 is considered to avoid excessive deformation and breakage, while also ensuring the firmness of the latching protrusion 34 and the housing 8 after installation.

[0058] like Figure 11As shown, the clamping jaw 33 is in the shape of a circular arc with the center of the valve body 1 as the center, and the corresponding central angle is A1; in this embodiment, the limiting piece 32 is also in the shape of a circular arc with the center of the valve body 1 as the center, and the corresponding central angle is A2, and A1 / A2 is 1.2-2.5. If the A1 / A2 ratio is less than 1.2, it means that the circumferential length of the clamping jaw 33 is too small, and at this time, the circumferential length of the clamping convex part 34 on the clamping jaw 33 is also too small, so that after installation is completed, the contact area between the clamping convex part 34 and the shell 8 is too small, resulting in that the clamping strength of the two is not high. If the A1 / A2 ratio is greater than 2.5, it means that the circumferential length of the limiting piece 32 is too small, at this time, the limiting piece 32 is insufficient to control the degree of eccentricity or inclination of the valve body relative to the shell 8, and further insufficient to limit the deformation amplitude of the clamping jaw 33, which may result in the clamping jaw 33 continuing to deform to a large extent and breaking. Within the above ratio range, the overlarge deformation of the clamping jaw 33 is avoided, and the firmness of the clamping convex part 34 and the shell 8 after installation is completed is considered.

[0059] The mounting part 3 further comprises a connecting part 31 surrounding the air passage 4, which is in the shape of a hollow column, and in this embodiment, the connecting part 31 is specifically in the shape of a hollow cylinder, the connecting part 31 is connected with the main body part 2, and the limiting piece 32 and the clamping jaw 33 are circumferentially spaced apart at the end of the connecting part 31. The extension direction of the connecting part 31 is not limited here, which can extend along the axial direction of the valve body 1, or extend outwardly in a direction deviating from the center axis O line of the valve body 1, and in this embodiment, the connecting part 31 extends along the axial direction of the valve body 1.

[0060] It should be noted that, as shown in Figure 4 , Figure 6 , Figure 10 In this embodiment, the cavities surrounded by the limiting piece 32 and the clamping jaw 33, the hollow cylindrical connecting part 31 inside and the hollowed-out area of the main body part 2 are connected together to form the above-mentioned air passage 4.

[0061] The mounting part 3 is divided into two parts, and the connecting part 31 extends circumferentially continuously, which ensures the structural stability of the whole mounting part 3, and also ensures the connection strength between the clamping jaw 33 and the limiting piece 32 and the main body part 2. Defining the end connected with the connecting part 31 of the limiting piece 32 and the clamping jaw 33 as the starting end, and the other end as the end, the starting end of the clamping jaw 33 and the limiting piece 32 is prevented from being easily broken.

[0062] The circumferential length of the limiting piece 32 gradually decreases from the starting end connected with the connecting part 31 to the end, so that Figure 1 , Figure 5The circumferential length of the limiting member 32 gradually decreases from bottom to top, so that the circumferential gap of the limiting member 32 and the pawl 33 gradually increases from bottom to top. The structure provides sufficient deformation space for the force deformation of the pawl 33. When the clamping protrusion 34 is pressed against the mounting port 81, the end of the pawl 33 can deform more, facilitating the installation of the breather valve and the shell 8, and avoiding interference between the end of the pawl 33 and the end of the limiting member 32 due to the small gap. The larger circumferential length of the starting end of the limiting member 32 ensures that the limiting member 32 and the connecting portion 31 have sufficient connection strength, and the limiting member 32 has greater mechanical strength, which is conducive to the effective control of the eccentricity or inclination of the valve body relative to the shell 8, thereby limiting the further radial inward deformation of the pawl 33 and avoiding the pawl 33 being broken.

[0063] In the above structure, it is not limited that the pawl 33 and the limiting member 32 extend along the axis direction of the valve body 1, or both extend obliquely, or one extends axially and the other extends obliquely. In this embodiment, the limiting member 32 extends along the axis direction of the valve body 1, and the pawl 33 extends obliquely along a direction deviating from the center axis O line of the valve body 1, that is, Figure 8 The angle α between the center axis O line of the valve body 1 and the extension line L of the pawl 33 exists. From Figure 11 , Figure 12 It can be seen that the inner circle of the end of the pawl 33 is radially outside the inner circle of the connecting portion 31, the outer circle of the end of the pawl 33 is also radially outside the outer circle of the connecting portion 31, and the inner and outer circles of the end of the limiting member 32 coincide or tend to coincide with the inner and outer circles of the connecting portion 31. The pawl 33 is slightly inclined outward, and during installation, the inclined pawl 33 can deform more, and the installation of the breather valve is more labor-saving. Even in the scenario where the size of the mounting port 81 is slightly smaller than the initial size of the plurality of pawls 33, and needs to be installed obliquely, the breather valve can still be quickly clamped into the mounting port 81 in a relatively labor-saving manner. The limiting member 32 extends axially to ensure its structural stability and avoid large deformation under stress, ensuring that the limiting member 32 can effectively control the eccentricity or inclination of the valve body relative to the shell 8. The cooperation of the pawl 33 and the limiting member 32 enables the installation portion 3 to deform sufficiently to adapt to the eccentric or inclined positioning of the breather valve, but also effectively controls the eccentricity or inclination of the valve body relative to the shell 8, and the pawl 33 that first contacts and abuts against the mounting port 81 is not broken due to excessive deformation.

[0064] As Figure 4As shown, the outer wall of the clamping protrusion 34 has at least a guide surface 341 and a fixing surface 342, the guide surface 341 extends from the end of the clamping pawl 33 to the starting end, and is inclined to the direction deviating from the central axis O line, and the fixing surface 342 extends horizontally along the direction perpendicular to the central axis O line. The guide surface 341 is a conical surface, which facilitates the insertion of the clamping pawl 33 into the mounting port 81, and the fixing surface 342 hooks the outer peripheral position of the mounting port 81 of the shell 8 after the installation is completed, thereby achieving the firm installation of the breather valve. In the embodiment, the fixing surface 342 is arranged on the fixing section, the outer surface of the fixing section is a cylindrical surface, and the fixing surface 342 is located on the end surface of the fixing section away from the guide surface 341, and the guide surface 341 and the fixing section are integrally formed.

[0065] The clamping pawl 33 includes a first positioning section 331 located at one end of the clamping protrusion 34 away from the main body part 2, and the first positioning section 331 extends in the axial direction, and the limiting part 32 includes a second positioning section 321 corresponding to the first positioning section 331 in the axial direction, and the second positioning section 321 extends in the axial direction. Figure 7 As shown, the part of the clamping pawl 33 between the L1 line and the L2 line is the first positioning section 331, and the part of the limiting part 32 between the L1 line and the L2 line is the second positioning section 321. In the working condition that the installation space can meet the vertical installation of the breather valve relative to the shell 8, in the initial stage of the vertical insertion and installation of the breather valve, when the clamping pawl 33 has not yet been subjected to the extrusion action of the inner wall of the mounting port 81 of the shell 8, the first positioning section 331 and the second positioning section 321 are first inserted into the mounting port 81 of the shell 8, so that the valve body 1 is vertically positioned relative to the shell 8, facilitating the further insertion and installation operation, and also facilitating the guarantee of the vertical installation of the valve body 1.

[0066] The length of the first positioning section 331 is H1, the axial length of the clamping pawl 33 is H2, and H1 / H2 is 0.08-0.2. If the ratio of H1 / H2 is greater than 0.2, it indicates that the length of the first positioning section 331 is too large, and at this time, the space required for the vertical installation of the breather valve and the shell 8 is large; if the ratio of H1 / H2 is less than 0.08, it indicates that the length of the first positioning section 331 is too small, and at this time, the vertical positioning function cannot be well played. Within the above ratio range, the vertical positioning function and the convenience of installation are considered.

[0067] The number of the clamping pawls 33 and the limiting parts 32 is equal, and at least two, and the clamping pawls 33 and the limiting parts 32 are distributed in a circumferential staggered manner. Figures 1-12 、 Figure 14 It is a schematic view of the embodiment 1 of the utility model, in the above structure embodiment, the number of the clamping pawl 33 and the limiting part 32 is three. In the embodiment 3, as shown in the figure, Figure 15 The number of the clamping pawl 33 and the limiting part 32 is two, or in the embodiment 4, as shown in the figure, Figure 16As shown, the number of the clamping claws 33 and the number of the limiters 32 are both four. The number of the clamping claws 33 is equal to the number of the limiters 32 and the clamping claws 33 and the limiters 32 are staggered. The distribution of the clamping claws 33 and the limiters 32 is more reasonable. In the working condition of the inclined installation, any one of the clamping claws 33 firstly contacts with the installation port 81, and can be limited by the limiters 32 adjacent to the clamping claws 33 in the circumferential direction to avoid excessive deformation, effectively avoiding the clamping claws 33 being broken. Moreover, after the installation is completed, the clamping claws 33 are evenly distributed in the circumferential direction of the installation port 81, the elastic deformation of the circumferential direction after being extruded is relatively balanced, the clamping between the clamping claws 33 and the shell 8 is more stable, and the connection between the breather valve and the shell 8 is avoided to be unstable due to the uneven distribution of the clamping claws 33.

[0068] As shown in Figure 14 , Figure 4 and Figure 6 , a plurality of clamping portions 51 are arranged at intervals in the circumferential direction of the valve cover 5, and an axial limiting portion 21 is formed inside the end of the main body portion 2 away from the installation portion 3. The clamping portions 51 and the axial limiting portion 21 are clamped and matched to realize the detachable connection of the valve body 1 and the valve cover 5, and the installation process is simple and fast. In this embodiment, the valve cover 5 is detachably connected with the valve body 1, and of course in other embodiments, the valve cover 5 can be integrally connected with the main body portion 2, such as welding.

[0069] As shown in Figure 17 , the shell assembly includes the shell 8 with the installation port 81, the breather valve with the above structure, and the sealing ring 7 sleeved on the outer periphery of the installation portion 31. The installation port 81 is in a cylindrical shape, the installation portion 3 of the breather valve is installed at the installation port 81, the fixing surface 342 of the clamping protrusion 34 abuts against the outer peripheral surface of the installation port 81, thereby preventing the installation portion 3 from being separated from the installation port 91, the sealing ring 7 is clamped between the valve body 1 and the shell 8, and the sealing ring 7 is extruded by the surface of the main body portion 2 towards the sealing ring 7 and the area of the shell 8 located at the outer periphery of the installation port 81, and the limiters 32 are in contact with or radially separated from the inner wall of the installation port 81.

[0070] When the breather valve and the shell 8 are installed, especially when the breather valve is eccentrically positioned or obliquely positioned into the installation port 81, the guide surface 341 of the clamping protrusion 34 of one or both clamping claws 33 first contacts and abuts against the inner wall of the installation port 81, the clamping protrusion 34 is pressed radially inward, so that the clamping claw 33 is deformed radially inward as a whole, and the eccentricity or obliqueness of the valve body 1 relative to the shell 8 is increased synchronously; as the clamping claw 33 gradually slides into the installation port 81, the clamping claw 33 is pressed as a whole until the outer wall of the clamping protrusion 34 is flush with the outer wall of the limiting piece 32, the outer wall of the limiting piece 32 also contacts and abuts against the inner wall of the installation port 81, and the limiting piece 32 controls the eccentricity or obliqueness of the valve body 1 relative to the shell 8; at this time, the clamping protrusion 34 cannot be continuously pressed radially inward under the condition that the external force is unchanged, or the amplitude of the continuous radial inward pressing of the clamping protrusion 34 is small, thereby limiting the further radial inward deformation amplitude of the clamping claw 33, that is, when the limiting piece 32 contacts and abuts against the installation port 81, the clamping claw 33 and the limiting piece 32 will continue to slide into the installation port 81 along a basically constant oblique angle until the clamping protrusion 34 completely enters the installation port 81 and the fixing surface 342 of the clamping protrusion 34 hooks the outer peripheral surface of the installation port 81, at this time, the sealing ring 7 is pressed by the surface of the main body portion 2 towards the sealing ring 7, the outer side surface of the installation portion 3 and the outer peripheral surface of the installation port 81, thereby ensuring the good sealing performance between the breather valve and the installation port 81; the assembly is completed, at this time, the limiting piece 32 contacts the inner wall of the installation port 81, or the limiting piece 32 is radially separated from the inner wall of the installation port 81.

[0071] The above specific embodiments are used to explain and illustrate the present application, rather than limit the present application, any modification and change made to the present application within the spirit and protection scope of the claims of the present application, falls into the protection scope of the present application.

Claims

1. A vent valve, including, The valve body includes a connected main body and a mounting part, and forms a venting channel through the main body and the mounting part; A valve cover is located at the end of the main body that is away from the mounting part, and forms a ventilation area between the valve cover and the main body. A waterproof and breathable membrane is sealed and fixed to the end face of the main body away from the mounting part, and covers the breathable channel; Its features are, The mounting part includes a limiting member and a claw arranged circumferentially around the ventilation channel. The outer side of the claw protrudes radially outward to form a locking protrusion, which protrudes radially from the outer side of the limiting member.

2. The vent valve according to claim 1, characterized in that, The limiting member is a columnar member, or the limiting member has an arc-shaped outer wall for engaging with the inner wall of the mounting opening of the housing.

3. The vent valve according to claim 1 or 2, characterized in that: The maximum distance between the outer side of the snap-fit ​​protrusion and the central axis of the valve body is D1, and the maximum distance between the outer side of the limiting member and the central axis of the valve body is D2. Then D1 / D2 is 1.1-1.

3.

4. The vent valve according to claim 2, characterized in that: The claw is arc-shaped with a central angle of A1, and the limiting member is arc-shaped with a central angle of A2. Therefore, A1 / A2 is 1.2-2.

5.

5. The vent valve according to claim 2, characterized in that: The mounting part also includes a connecting part surrounding the ventilation channel. The connecting part is hollow columnar and connected to the main body. The limiting member and the claw are located at the end of the connecting part.

6. The vent valve according to claim 5, characterized in that: The circumferential length of the limiting member gradually decreases from the starting end connected to the connecting part to the end end, so that the circumferential gap between the limiting member and the claw gradually increases.

7. The vent valve according to claim 1, characterized in that: The number of the claws and limiting components is equal, and there are at least two of each, which are distributed in a circumferential staggered pattern.

8. The vent valve according to claim 1, characterized in that: The claw extends at an angle off-center from the central axis, and the limiting member extends axially.

9. The vent valve according to claim 1, characterized in that: The claw includes a first positioning segment located at the end of the engaging protrusion away from the main body, the first positioning segment extending axially, and the limiting member includes a second positioning segment corresponding axially to the first positioning segment.

10. A housing assembly, characterized in that: The device includes a housing with an installation port, a vent valve as described in any one of claims 1-9, and a sealing ring fitted around the outer periphery of the installation portion. The vent valve is installed at the installation port, the sealing ring is engaged between the valve body and the housing, and the sealing ring is compressed by the surface of the main body facing the sealing ring and the area of ​​the housing located around the installation port. The limiting member is in contact with or radially separated from the inner wall of the installation port.

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