A breather valve and housing assembly

Abstract

The utility model discloses a kind of vent valves, including, valve body, including the main part and installation part being connected, and form breathable passage;Valve cover, be located in main part and form venting area with it;Waterproof breathable membrane, sealingly fixed in the end surface of main part away from installation part, and cover breathable passage;Installation part includes: connecting portion, present hollow column, connect with main part, and extend along axial direction;Multiple clamping claws, circumferentially spaced distribution in the end of connecting portion, to form gap between adjacent clamping claw, clamping claw extends along the direction deviating from central axis is inclined.This utility model also discloses shell assembly.Due to the axial extension of the connecting portion of installation part, the structural stability of installation part whole is guaranteed, the connection strength between multiple clamping claws and main part is also guaranteed, to avoid the easy fracture of the starting end of clamping claw;The deformation of the clamping claw that extends obliquely is greater, and installation is more labor-saving;The gap between adjacent clamping claw is larger, avoid interference of adjacent clamping claw, reduce installation difficulty.

Description

TECHNICAL FIELD

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

[0002] Breather valve is often used in automobile industry and other industries with breather, balance internal and external air pressure, and generally includes valve body and waterproof and breathable membrane, waterproof and breathable membrane is arranged on valve body, and the end of valve body away from waterproof and breathable membrane is provided with mounting portion, the mounting portion includes a plurality of clamping claws, and the narrow slit is formed between adjacent clamping claws, the inner side surface and the outer side surface of clamping claw are parallel to the central axis of breather valve, that is, the clamping claw as a whole extends along the axial direction, and the circumferential width of the narrow slit is also relatively small, the clamping claw structure is relatively stable, the deformation formed in the installation process is small, and damage can be avoided due to excessive deformation, so the clamping claw with such structure can be better aligned with the installation port and assembled during vertical installation into the installation port, with the functions of simple assembly and stable structure.

[0003] However, due to the limitation of assembly space, the breather valve often cannot be ideally installed vertically and clamped into the installation port, for example, when the size of the installation port is slightly smaller than the size of the clamping claw in the initial state, the breather valve needs to be clamped into the installation port in a relatively inclined state, and during actual clamping operation, the clamping claw is usually first abutted against the inner wall of the installation port, and the contact area of the remaining clamping claws with the installation port is relatively small, and since the deformation capacity of the clamping claw structure of the breather valve is relatively limited, it will lead to insufficient deformation of the remaining clamping claws, increasing the installation difficulty of the breather valve in the environment of assembly at a relatively inclined angle. Moreover, due to the small circumferential width of the narrow slit, interference between the clamping claws may occur during installation, further increasing the installation difficulty.

[0004] Therefore, it is necessary to further improve the structure of the mounting portion to solve the installation difficulty of the existing breather valve, especially to reduce the installation difficulty in the inclined installation scenario. SUMMARY

[0005] In order to overcome the shortcomings of the prior art, the utility model provides a kind of breather valve and shell assembly, its connecting portion extends along the axial direction, ensures the overall structural stability and connection strength, its clamping claw extends obliquely outward, so that the clamping claw can produce greater deformation during installation, and the installation of breather valve is more labor-saving.

[0006] The utility model discloses the technical scheme adopted to solve its technical problems is: a kind of breather valve, including,

[0007] Valve body, including the main part and mounting portion connected, and forming the breather passage through the main part and mounting portion;

[0008] Valve cover, set at the end of the main part away from mounting portion, and form the ventilation area with the main part.

[0009] The waterproof and breathable film is fixedly sealed to the end face of the main body part away from the mounting part and covers the breathable passage;

[0010] The mounting part comprises:

[0011] The connecting part is in a hollow columnar shape, connected to the main body part, and extends in the axial direction;

[0012] A plurality of clamping claws are circumferentially spaced apart at the end of the connecting part to form gaps between adjacent clamping claws, and the clamping claws extend in a direction deviating from the central axis.

[0013] The mounting part of the breathable valve is in two parts, and the connecting part extends in the axial direction, thereby ensuring the structural stability of the whole mounting part. The connecting part extending in the axial direction also ensures the connection strength between the plurality of clamping claws and the main body part, thereby preventing the initial end of the clamping claw from being easily broken. At the same time, the plurality of clamping claws extend outwardly and obliquely, and the deformation of the obliquely extending clamping claw is greater during the installation process. The installation of the breathable valve is more labor-saving. Even in the scenario where the size of the installation opening is slightly smaller than the initial size of the plurality of clamping claws and the installation needs to be inclined, the breathable valve can still be quickly clamped into the installation opening in a relatively labor-saving manner. Moreover, since the plurality of clamping claws extend outwardly and obliquely, the gap between adjacent clamping claws is larger, and interference between adjacent clamping claws during the installation process can be avoided, thereby reducing the installation difficulty.

[0014] Further, the angle of the obliquely extending direction of the clamping claw deviating from the central axis is 3-12°, and / or the axial length of the connecting part is H1, and the axial length of the clamping claw is H2, and H1 / H2 is 0.15-0.4.

[0015] If the included angle α exceeds 12°, the oblique angle of the clamping claw is too large, which can cause excessive deformation of the clamping claw, and the structural stability of the clamping claw is not high. Moreover, the corner at the connection between the clamping claw and the connecting part is too large, and the connection between the clamping claw and the connecting part is prone to cracking. If the included angle α is less than 3°, the oblique angle of the clamping claw is too small, which can cause insufficient deformation of the clamping claw, and the clamping claw cannot meet the requirement of being quickly clamped into the installation opening in a relatively labor-saving manner in the scenario of inclined installation. If the included angle α is within the above range, the oblique angle of the clamping claw is not too large or too small, and the deformation of the clamping claw during the installation process is appropriate, which is labor-saving and will not be broken due to excessive deformation.

[0016] If the H1 / H2 ratio is less than 0.15, it indicates that the axial length of the connecting part is too small, or the axial length of the claw is too large, at this time the structural stability of the claw is not high, and the claw is prone to excessive deformation and breakage; if the H1 / H2 ratio is greater than 0.4, it indicates that the axial length of the connecting part is too large, or the axial length of the claw is too small, at this time the elastic deformation of the claw is small, which is not conducive to forming a tight and firm clamping with the mounting port;

[0017] In the case where the above two characteristics are met at the same time, the change range of the axially extending connecting part and the obliquely extending claw at the connection is more appropriate, the transition is still smooth, preventing the connection between the claw and the connecting part from cracking during installation; moreover, within the corresponding range of inclination angles, the opening range of the claw relative to the connecting part is appropriate, and even after experiencing high temperature, the resilience of the claw decreases, but the claw can still form a tight and firm clamping with the mounting port, and the claw will not loosen.

[0018] Further, the thickness of the claw gradually decreases from the starting end to the end in the radial direction; and / or, the inner side surface and the outer side surface of the claw obliquely extend, and the inclination angle of the inner side surface of the claw relative to the central axis is greater than the inclination angle of the outer side surface of the claw relative to the central axis.

[0019] The thickness change of the claw ensures that the claw and the connecting part have sufficient connection strength, and at the same time, the claw can produce sufficient deformation during installation to adapt to the situation of inclined installation; the inclination angle of the inner side surface of the claw relative to the central axis is greater than the inclination angle of the outer side surface of the claw relative to the central axis, the transition between the outer side surface of the claw and the connecting part is smoother, which can improve the strength of the claw, and at the same time, the inner side surface of the claw extends obliquely towards the direction closer to the outer side surface, which is conducive to greater deformation of the claw.

[0020] Further, the outer side surface of the claw comprises a vertical segment and an inclined segment, the vertical segment extends axially from the end of the connecting part, and the inclined segment extends obliquely from the end of the vertical segment in a direction deviating from the central axis;

[0021] The thickness of the connecting part is D1, and the corresponding thickness at the starting end of the inclined segment of the outer side surface of the claw is D2, and D1 / D2 is 1.05-1.2.

[0022] The vertical segment can limit the claw from opening outward by too large an angle, ensure the connection strength of the claw and the connecting part, avoid the claw from opening outward relative to the connecting part by too much, ensure a high structural strength of the claw, and the axial length of the vertical segment will not be too large, so that the claw can still produce appropriate elastic deformation;

[0023] If the D1 / D2 ratio is greater than 1.2, it means that the thickness of the starting end of the inclined section of the pawl is too small, at this time the structural strength of the pawl is not high, and the pawl is prone to breakage after deformation; if the D1 / D2 ratio is less than 1.05, it means that the thickness of the starting end of the inclined section of the pawl 32 is too large, at this time the deformation of the pawl is too small, and it cannot be deformed enough to meet the inclined installation condition; within the above numerical range, the structural strength and elastic deformation of the pawl after stress are considered.

[0024] Further, the circumferential width of the gap gradually increases from the starting end to the end of the pawl, and the top surface of the gap is a curved surface arched in the direction of the connecting portion.

[0025] The gap gradually increases from top to bottom, providing more deformation space for multiple pawls, reducing the installation difficulty of the breather valve in the environment of relatively inclined installation; furthermore, the circumferential width of the gap is reduced, and interference between adjacent pawls will not occur during installation, further reducing the installation difficulty; the curved surface design makes the connection between the pawl and the connecting portion smoother, which is beneficial to the stress deformation of the pawl, and the pawl is more prone to deformation under external force, and adjacent pawls can deform more evenly after being stressed.

[0026] Further, the outer side of the end of the pawl is provided with a clamping block, and the outer wall of the clamping block has at least a guide surface and a fixing surface, the guide surface extends obliquely from the end of the pawl to the starting end and deviates from the central axis, and the fixing surface extends horizontally along the direction perpendicular to the central axis; and / or, at least one side of the end of the pawl is formed as a material missing part.

[0027] The guide surface is a tapered surface, which facilitates the insertion of the pawl into the installation port, and the fixing surface hooks the outer peripheral position of the housing installation port after installation, achieving firm installation of the breather valve; the material missing part further increases the circumferential width of the gap between adjacent pawls, especially the width of the inner circle of the gap is greater than that of the outer circle, which is more conducive to the extrusion deformation of the pawl, so that the pawl can provide sufficient elastic deformation to adapt to the inclined installation condition of the breather valve, and interference between adjacent pawls will not occur, and the thickness of the end of the multiple pawls is also reduced, which makes the entire pawl prone to extrusion deformation, making the installation of the breather valve easier, and avoiding the connection between the pawl and the connecting portion from being broken.

[0028] Further, the main body portion has an annular drainage area located outside the waterproof and breathable membrane, which extends obliquely from the inside to the outside and away from the valve cover;

[0029] The annular drainage area is spaced apart in the circumferential direction and provided with a plurality of clamping portions, and the valve cover is provided with an axial limiting portion for axially preventing the clamping portion from disengaging.

[0030] The annular drainage area facilitates the downward flow of the accumulated liquid, avoiding the accumulation of the liquid on the surface of the water drainage and air permeation film; the clamping portion and the axial limiting portion cooperate to realize the detachable connection of the valve body and the valve cover, and the installation is simple and fast.

[0031] Further, the outer periphery of the mounting portion is sleeved with a sealing ring, the axial center of the sealing ring is located on a first plane, the end of the connecting portion is located on a second plane, and the first plane is closer to the valve cover than the second plane.

[0032] At this time, the sealing ring is more extruded by the connecting portion than by the clamping claw, avoiding the extrusion of the sealing ring caused by the deformation of the clamping claw, and ensuring that the sealing ring can be fully extruded after installation, so that the sealing ring can play a better sealing performance, that is, ensuring the good sealing performance between the air permeation valve and the installation port.

[0033] Further, the surface of the main body portion towards the sealing ring side has a pressing surface and a avoiding surface located outside the pressing surface, the radial width of the pressing surface is greater than the cross-sectional radius of the sealing ring, and the avoiding surface extends obliquely from the pressing surface radially outward and towards the valve cover.

[0034] The radial width of the pressing surface is greater than the cross-sectional radius of the sealing ring, ensuring that the pressing surface can extrude the sealing ring sufficiently; the avoiding surface is provided so that the axial spacing between the surface of the main body portion towards the sealing ring and the shell is relatively small after the air permeation valve is installed, and the avoiding surface obliquely extends upward to increase the spacing between the shell, avoiding interference with the installation.

[0035] The utility model discloses further disclose a shell assembly, including the shell with installation port, as described above air permeation valve, and the sealing ring of sleeve set in the outer periphery of installation portion, the installation port is flared conically, the installation portion of air permeation valve is installed at this installation port, the sealing ring is at least partially clamped in installation port, and the sealing ring is extruded by the surface of the main body portion towards the sealing ring, the outer side surface of installation portion and the inner wall of installation port.

[0036] In this way, the sealing ring can be extruded at three places at the same time, including multiple axial and radial extrusions, stable and reliable sealing performance, ensuring effective sealing assembly between the air permeation valve and the shell installation port, and the installation process of the air permeation valve is labor-saving, convenient and fast.

[0037] The utility model discloses a beneficial effect is: the installation part of air vent is two parts, and its connecting portion extends axially, guarantees the structural stability of the whole installation part, and the connecting portion of axial extension also guarantees the connecting strength between multiple claws and the main part, avoids the easy fracture of the starting end of claw, at the same time, multiple claws all extend obliquely outward, in the installation process, the deformation of obliquely extending claw is greater, and the installation of air vent is more labor-saving, even in the scene of the size of installation port being slightly smaller than the initial state size of multiple claws, needing to be obliquely installed, still can be quickly clamped into the installation port in the relatively labor-saving mode, and moreover, since multiple claws extend obliquely outward, the gap between adjacent claws is greater, can also avoid the interference of adjacent claws in the installation process, and then reduces the installation difficulty, the angle of the oblique extension direction of claw deviating from the central axis is in the limited range, and the axial length of connecting portion and claw is in the limited range, and the change range of connecting portion of axial extension and oblique extension claw is more appropriate at the joint, and the transition is still smooth, prevents the cracking of the joint between claw and connecting portion in the installation process, and the outward opening range of claw relative to connecting portion is more appropriate, and will not be too big, even after experiencing high temperature, the resilience of claw reduces, and the claw still can form the close, firm clamping between installation port, the thickness change of claw guarantees that the connecting strength between claw and connecting portion is enough, and simultaneously, the claw can produce enough deformation in the installation process, and adapts to the situation needing to be obliquely installed, the inclination angle of the inner side of claw relative to the central axis is greater than the inclination angle of its outer side relative to the central axis, and the transition between the outer side of claw and connecting portion is more smooth, can improve the strength of claw, and simultaneously, the inner side of claw extends obliquely towards the direction of being closer to the outer side, is favorable to the greater deformation of claw, and the setting of vertical section can limit the outward opening of claw to be too big, guarantees the connecting strength of claw and connecting portion, avoids the excessive outward opening of claw relative to connecting portion, guarantees the higher structural strength of claw, and moreover, the axial length of vertical section will not be too big, makes the elastic deformation of claw still appropriate. BRIEF DESCRIPTION OF DRAWINGS

[0038] Figure 1 The utility model provides a perspective view of air vent.

[0039] Figure 2 The utility model provides a bottom view of air vent.

[0040] Figure 3 The utility model provides a perspective view of air vent. Figure 1 .

[0041] Figure 4 The utility model provides a perspective view of air vent. Figure 2 .

[0042] Figure 5 The utility model provides a perspective view of air vent. Figure 2A-A cross-sectional view in the figure.

[0043] Figure 6 The utility model provides a valve body's perspective drawing.

[0044] Figure 7 The utility model provides a valve body's side view Figure 1 .

[0045] Figure 8 The utility model provides a valve body's side view Figure 2 .

[0046] Figure 9 The utility model provides a valve body's cross section Figure 1 .

[0047] Figure 10 The utility model provides a valve body's cross section Figure 2 .

[0048] Figure 11 For Figure 10 The structure enlarged view of B in the figure.

[0049] Figure 12 The utility model provides a valve body's plan view.

[0050] Figure 13 The utility model provides a valve cover's perspective drawing.

[0051] Figure 14 The utility model provides a valve cover's cross section.

[0052] Figure 15 The utility model provides a shell assembly's cross section, when the shell shows the part of installation port.

[0053] Wherein, 1 - valve body, 2 - main part, 21 - annular drainage area, 22 - pressing surface, 23 - avoiding surface, 3 - installation part, 31 - connecting part, 32 - claw, 321 - claw inner side, 322 - claw outer side, 323 - vertical section, 324 - inclined section, 325 - material lack, 33 - gap, 331 - gap top surface, 34 - clamping block, 341 - guide surface, 342 - fixed surface, 4 - ventilation passage, 5 - valve cover, 51 - axial limiting part, 52 - clamping part, 53 - circumferential limiting part, 54 - axial limiting groove, 6 - ventilation area, 7 - waterproof air-permeable membrane, 8 - sealing ring, 9 - shell, 91 - installation port. DETAILED DESCRIPTION

[0054] 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.

[0055] like Figure 1 , Figure 2 As shown, a breathable valve includes a valve body 1, a valve cover 5, and a waterproof and breathable membrane 7. The valve body 1 includes a main body portion 2 and a mounting portion 3 axially connected, and the valve body 1 forms a breathable channel 4 that passes through the main body portion 2 and the mounting portion 3. The mounting portion 3 functions to connect with... Figure 15 The device housing 9 shown is fitted with a mounting port 91 to fix the vent valve onto the mounting port 91. A valve cover 5 is located at the end of the main body 2 opposite to the mounting portion 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 7. The waterproof and breathable membrane 7 is sealed and fixed to the end face of the main body 2 opposite to the mounting portion 3, covering the ventilation channel 4. The ventilation area 6 is connected to the ventilation channel 4 through the waterproof and breathable membrane 7. This connection refers to the ability to exchange gases, but not to allow liquid flow. The waterproof and breathable membrane 7 is generally made of PTFE microporous membrane.

[0056] like Figures 6-10 As shown, the mounting part 3 includes a connecting part 31 and multiple claws 32. The connecting part 31 is connected to the main body part 2 and extends along the axial direction of the valve body 1. The connecting part 31 is hollow cylindrical. In this embodiment, the connecting part 31 is specifically hollow cylindrical. Multiple claws 32 are circumferentially spaced at the end of the connecting part 31, forming gaps 33 between adjacent claws 32. All claws 32 extend obliquely in a direction deviating from the central axis. Here, the central axis refers to the central axis of the valve body 1, i.e. Figure 3 The O line shown.

[0057] In this embodiment, the cavity surrounded by multiple claws 32, the interior of the hollow columnar connecting part 31, and the hollow area of ​​the main body 2 are connected to form the above-mentioned ventilation channel 4.

[0058] The installation part 3 of the breather valve is divided into two parts, the connecting part 31 extends axially, the overall structural stability of the installation part 3 is ensured, the connecting strength between the plurality of clamping claws 32 and the main body part 2 is also ensured, and the initial end of the clamping claw 32 is prevented from being easily broken; at the same time, the plurality of clamping claws 32 extend outwardly and obliquely, in the installation process, the deformation of the obliquely and outwardly extending clamping claw 32 is greater, the installation of the breather valve is more labor-saving, even in the scene where the size of the installation opening 91 is slightly smaller than the initial state size of the plurality of clamping claws 32 and needs to be obliquely installed, the breather valve can still be quickly clamped into the installation opening 91 in a relatively labor-saving manner; and since the plurality of clamping claws 32 extend outwardly and obliquely, the gap between the adjacent clamping claws 32 is larger, and interference between the adjacent clamping claws 32 in the installation process can also be avoided, thereby reducing the installation difficulty.

[0059] Specifically, the angle of the obliquely extending direction of the clamping claw 32 deviating from the central axis is 3-12°, so that Figure 5 As an example, the central axis of the valve body 1 is O line, the inner side surface of one of the clamping claws 32 is selected, and the included angle α between the inner side surface and the O line is 3-12°; of course, in other embodiments, the outer side surface of one of the clamping claws 32 can also form an included angle with the O line; in other embodiments, the surface parallel to the extending direction of the clamping claw 32 between the inner side surface and the outer side surface of the clamping claw 32 can also form an included angle with the O line; no matter whether the inner side surface, the outer side surface, or the surface parallel to the extending direction of the clamping claw 32 between the inner side surface and the outer side surface is selected as one side of the included angle, it needs to be ensured that the included angle is within the range of 3-12°. If the included angle α exceeds 12°, the oblique angle of the clamping claw 32 is too large, which can cause excessive deformation of the clamping claw 32, and then the structural stability of the clamping claw 32 is not high, and in addition, the corner of the connection between the clamping claw 32 and the connecting part 31 is too large, the connection between the clamping claw 32 and the connecting part 31 is prone to cracking, and in addition, the large oblique angle of the clamping claw 32 also brings certain difficulty to the overall clamping of the clamping claw 32 into the installation opening 91; if the included angle α is less than 3°, the oblique angle of the clamping claw 32 is too small, which can cause insufficient deformation of the clamping claw 32, and then the clamping claw 32 cannot meet the requirement of being quickly clamped into the installation opening 92 in a relatively labor-saving manner in the scene of oblique installation of the breather valve; the included angle α within the numerical range can make the oblique angle of the clamping claw 32 not too large or too small, the deformation of the clamping claw 32 is appropriate in the installation process, the installation is labor-saving, and the clamping claw 32 will not be broken due to excessive deformation.

[0060] The included angle between the inner side surface of the clamping claw 32 and the O line and the included angle between the outer side surface of the clamping claw 32 and the O line can be the same or different, and the specific limitation is not made.

[0061] Further, as shown in Figure 10As shown, the axial length of the connecting portion 31 is H1, and the axial length of the clamping jaw 32 is H2, and H1 / H2 is 0.15-0.4. If the ratio of H1 / H2 is less than 0.15, it means that the axial length of the connecting portion 31 is too small, or the axial length of the clamping jaw 32 is too large, in which case the structural stability of the clamping jaw 32 is not high, and the clamping jaw 32 is prone to excessive deformation and breakage. If the ratio of H1 / H2 is greater than 0.4, it means that the axial length of the connecting portion 31 is too large, or the axial length of the clamping jaw 32 is too small, in which case the elastic deformation of the clamping jaw 32 is small, which is not conducive to forming a tight and firm clamping connection with the mounting opening 91.

[0062] Especially when the angle of the obliquely extending direction of the clamping jaw 32 deviating from the central axis is 3-12°, and the ratio of the axial length H1 of the connecting portion 31 to the axial length H2 of the clamping jaw 32 is 0.15-0.4, the two features are satisfied at the same time. The axial extension of the connecting portion 31 and the oblique extension of the clamping jaw 32 at the connection are relatively appropriate in the change range, and the transition is still smooth, preventing the connection between the clamping jaw 32 and the connecting portion 31 from cracking during installation. Moreover, within the corresponding range of the oblique angle, the outward opening range of the clamping jaw 32 relative to the connecting portion 31 is relatively appropriate and will not be too large. Even after experiencing high temperature, the resilience of the clamping jaw 32 is reduced, and the clamping jaw 32 can still form a tight and firm clamping connection with the mounting opening 91, and the clamping jaw 32 will not loosen.

[0063] The end of the clamping jaw 32 connected to the connecting portion 31 is defined as the starting end, and the other end is defined as the terminal end. The radial thickness of the clamping jaw 32 gradually decreases from the starting end to the terminal end, thereby ensuring that the clamping jaw 32 and the connecting portion 31 have sufficient connection strength, and at the same time, the clamping jaw 32 can produce sufficient deformation during installation to adapt to the situation that needs to be installed obliquely. The change in the thickness of the clamping jaw 32 is not specifically limited, which can be that the inner and outer sides of the clamping jaw 32 cooperate, and the inner and outer sides of the clamping jaw 32 obliquely extend from the starting end to the terminal end while moving closer to each other, thereby forming a change in the thickness of the clamping jaw 32. It can also be that the inner side of the clamping jaw 32 obliquely extends from the starting end to the terminal end while moving closer to the outer side. It can also be that the outer side of the clamping jaw 32 obliquely extends from the starting end to the terminal end while moving closer to the inner side.

[0064] In this embodiment, the inner side of the clamping jaw 32 obliquely extends from the starting end to the terminal end while moving closer to the outer side, i.e., as shown in Figure 9As shown, the inner side surface 321 and the outer side surface 322 of the clamping jaw 32 are both inclined to extend, and the inclination angle of the inner side surface 321 of the clamping jaw 32 relative to the center axis O is an angle γ, and the inclination angle of the outer side surface 322 of the clamping jaw 32 relative to the center axis O is an angle β, and the angle γ is greater than the angle β. At this time, the transition between the outer side surface 322 of the clamping jaw 32 and the connecting portion 31 is smoother, which can improve the strength of the clamping jaw 32, and at the same time, the inner side surface 321 of the clamping jaw 32 is inclined to extend towards the direction closer to the outer side surface, which is conducive to the clamping jaw 32 to deform more.

[0065] The outer side surface 322 of the clamping jaw 32 includes a vertical section 323 and an inclined section 324. The vertical section 323 extends axially from the end of the connecting portion 31, that is, the vertical section 323 is flush with the outer wall of the connecting portion 31. The inclined section 324 extends from the end of the vertical section 323 in a direction deviating from the center axis, in other words, the inner side surface 321 of the clamping jaw 32 is inclined to extend as a whole, but the outer side surface 322 of the clamping jaw 32 is not inclined to extend as a whole. For example, as shown in the direction, Figure 7 、 Figure 8 、 Figure 10 、 Figure 11 As an example, the mounting portion 3 is divided into upper and lower parts by the L1 line, and the connecting portion 31 is above the L1 line, and the clamping jaw 32 belongs to below the L1 line, wherein the vertical section 323 of the outer side surface 322 of the clamping jaw 32 is between the L1 line and the L2 line, and the inclined section 324 of the outer side surface 322 of the clamping jaw 32 is below the L2 line. The vertical section 323 can limit the clamping jaw 32 to open outward by too large an angle, ensure the connection strength of the clamping jaw 32 and the connecting portion 31, avoid the clamping jaw 32 to open outward relative to the connecting portion 31 too much, ensure the large structural strength of the clamping jaw 32, and the axial length of the vertical section 323 will not be too large, so that the clamping jaw 32 can still have appropriate elastic deformation. It should be noted that the axial length corresponding to the region below the L1 line is the axial length of the clamping jaw 32, which includes the axial length of the vertical section 323 and the axial length of the inclined section 324.

[0066] As shown in the direction, Figure 11 The thickness of the connecting portion 31 is D1, and the thickness of the starting end of the inclined section 324 of the outer side surface 322 of the clamping jaw 32 is D2, and the ratio of D1 / D2 is 1.05-1.2. If the ratio of D1 / D2 is greater than 1.2, it means that the thickness of the starting end of the inclined section 324 of the clamping jaw 32 is too small, and at this time the structural strength of the clamping jaw 32 is not high, and the clamping jaw 32 is prone to breakage after deformation; if the ratio of D1 / D2 is less than 1.05, it means that the thickness of the starting end of the inclined section 324 of the clamping jaw 32 is too large, and at this time the deformation of the clamping jaw 32 is too small, and it cannot have enough deformation to meet the inclined installation condition; within the above numerical range, the structural strength and the elastic deformation amount after stress of the clamping jaw 32 are considered.

[0067] As shown in the direction,Figure 6 , Figure 7 As shown, the circumferential width of the gap 33 between adjacent claws 32 gradually increases from the starting end to the end of the claw 32, and the top surface 331 of the gap 33 is a curved surface that arches towards the connecting part 31. In other words, the gap 33 is a V-shape with the opening facing downwards, and its top surface 331 is specifically a semi-circular arc surface or an upwardly arched cylindrical surface. This makes the connection between the claw 32 and the connecting part 31 smoother, which is beneficial to the deformation of the claw 32 under stress. That is, the claw 32 is more likely to deform under the action of external force, and adjacent claws 32 can undergo more balanced deformation after being subjected to force. In addition, the inverted V-shape of the gap 33 also provides a larger deformation space for multiple claws 32. When the vent valve is installed at an angle, one of the claws 32 can abut against the inner wall of the installation port 91 and produce a larger deformation. Subsequently, the other claws 32 also have space to deform, and the other claws 32 can also undergo a correspondingly larger deformation, reducing the installation difficulty of the vent valve in an environment where it is assembled at a relatively inclined angle. Furthermore, the reduced circumferential width of the gap 33 prevents interference between adjacent claws 32 during installation, further reducing the difficulty of installation.

[0068] like Figure 5 , Figure 7 , Figure 8 As shown, the outer side of the end of the claw 32 is provided with a locking block 34. The outer wall of the locking block 34 has at least a guide surface 341 and a fixing surface 342. The guide surface 341 extends obliquely from the end of the claw 32 toward the starting end and in a direction deviating from the central axis O. The fixing surface 342 extends horizontally in a direction perpendicular to the central axis O. The guide surface 341 is a conical surface, which facilitates the insertion of the claw 32 into the mounting port 91. After installation, the fixing surface 342 hooks onto the outer periphery of the mounting port 91 of the housing 9, realizing the secure installation of the vent valve. In this embodiment, the fixing surface 342 is provided on the fixing section. The outer surface of the fixing section is a cylindrical surface. The fixing surface 342 is located on the end face of the fixing section away from the guide surface 341. The guide surface 341 and the fixing section are integrally formed.

[0069] like Figure 2 As shown, a missing part 325 is formed at least on one circumferential side of the end of the claw 32. In this embodiment, missing parts 325 are provided on both circumferential sides of the end of the claw 32. The missing part 325 is formed by the missing portion of the end of the claw 32, which actually corresponds to the missing portion on both circumferential sides of the area corresponding to the locking block 34. Figure 2direction, the inner circumferential side of the claw 32 is clamped between the line connecting the outer circumferential side and the center of the claw 32 and the A-A line, that is, the S2 line is between the S1 line and the A-A line. Of course, in other embodiments, the material removal portion 325 can be formed on any side of the claw 32. The material removal portion 325 further increases the circumferential width of the gap 33 between adjacent claws 32, in particular, the width of the inner ring of the gap 33 is greater than the width of the outer ring, thereby more facilitating the extrusion deformation of the claw 32, so that the claw 32 can provide sufficient elastic deformation to adapt to the inclined installation of the vent valve, and there is no interference between adjacent claws 32, and the thickness of the ends of the plurality of claws 32 is also reduced, so that the entire claw 32 is prone to extrusion deformation, the installation of the vent valve is easier, and the connection between the claw 32 and the connecting portion 31 is avoided. broken.

[0070] As shown in Figure 3 , Figure 4 , Figure 7 , Figure 8 , Figure 12 , the main body portion 2 has an annular drainage area 21 located at the outer periphery of the waterproof breathable membrane 7, which extends obliquely from the inside to the outside and away from the valve cover 5, thereby facilitating the downward flow of the accumulated liquid and avoiding the accumulation of the accumulated liquid on the surface of the waterproof breathable membrane 7. The annular drainage area 21 is circumferentially spaced apart from a plurality of clamping portions 52, as shown in Figure 13 , Figure 14 , the valve cover 5 is provided with an axial limiting portion 51 for axially preventing the clamping portion 52 from being disengaged, and an axial limiting groove 54 is formed between the axial limiting portion 51 and the inner end surface of the valve cover 5, and the end of the clamping portion 52 is clamped in the axial limiting groove 54, thereby achieving detachable connection of the valve body 1 and the valve cover 5, and the installation process is simple and fast. The valve cover 5 is also provided with a circumferential limiting portion 53, and after the valve cover 5 and the valve body 1 are installed, the circumferential limiting portion 53 and the clamping portion 52 are circumferentially adjacent to each other, thereby preventing the valve cover 5 and the valve body 1 from rotating relative to each other. In this embodiment, the valve cover 5 is detachably connected to the valve body 1, and of course in other embodiments, the valve cover 5 can be integrally connected to the main body portion 2, such as welding.

[0071] As shown in Figure 1 , Figures 3-5 , the sealing ring 8 is provided on the outer periphery of the mounting portion 3, and the axial center of the sealing ring 8 is located on the first plane, and the end of the connecting portion 31 is located on the second plane, so that the first plane is closer to the valve cover 5 than the second plane, that is, Figure 5The direction shown is an example, the first plane is above the second plane. In other words, the sealing ring 8 is more extruded by the connecting portion 31, rather than mainly extruded by the clamping jaw 32, avoiding the deformation of the clamping jaw 32 to extrude the sealing ring 8, ensuring that the sealing ring 8 can be fully extruded after installation, ensuring that the sealing ring 8 can play a better sealing performance, that is, ensuring the good sealing performance between the breather valve and the installation port 91.

[0072] The surface of the main body portion 2 towards the sealing ring 8 has a pressing surface 22 and a avoiding surface 23 outside the pressing surface 22. The pressing surface 22 is a horizontally extending plane, the radial width of the pressing surface 22 is greater than the cross-sectional radius of the sealing ring 8, that is Figure 5 L4 line passes through the cross-sectional center of the sealing ring 8, L3 line passes through the intersection point of the pressing surface 22 and the avoiding surface 23, L4 line is radially inside L3 line, so as to ensure that the pressing surface 22 can extrude the sealing ring 8. The avoiding surface 23 extends radially outward from the pressing surface 22, towards the valve cover 5, that is, the avoiding surface 23 is an upwardly inclined conical surface. After the breather valve is installed, the axial distance between the surface of the main body portion 2 towards the sealing ring 8 and the housing 9 is relatively small, and the avoiding surface 23 extends upwardly to increase the distance between the avoiding surface 23 and the housing 9, avoiding interference with the installation.

[0073] As shown in the figure Figure 15 The housing assembly includes a housing 9 with an installation port 91, the breather valve with the above structure, and a sealing ring 8 sleeved on the outer periphery of the installation portion 3. The installation port 91 is a flared cone, the installation portion 3 of the breather valve is installed at the installation port 91, the fixing surface 342 of the clamping jaw 32 abuts against the outer peripheral surface of the installation port 91, thereby preventing the installation portion 3 from being separated from the installation port 91, at least part of the sealing ring 8 is clamped in the installation port 91, and the sealing ring 8 is extruded by the surface of the main body portion 2 towards the sealing ring 8, the outer surface of the installation portion 3 and the inner wall of the installation port 91, including multiple axial and radial extrusions, stable and reliable sealing performance.

[0074] When the breather valve and the shell 9 are installed, especially when the breather valve is clamped into the installation port 91 in a relatively inclined state, the guide surface 341 of one of the clamping claws 32 first abuts against the inner wall of the installation port 91, so that the clamping claw 32 is deformed by an appropriate amount, and the gaps 33 on both sides of the clamping claw 32 are reduced; as the clamping claw 32 gradually slides into the installation port 91, the remaining clamping claws 32 also enter the installation port 91 and are subjected to the extrusion action of the installation port 91; since the clamping claws 32 are inclined, all the clamping claws 32 can be deformed sufficiently to smoothly enter the installation port 91; until the clamping block 34 completely enters the installation port 91 and the fixing surface 342 thereof hooks the outer peripheral surface of the installation port 91, the installation of the breather valve and the shell 9 is completed in a relatively labor-saving state, at this time, the sealing ring 8 is extruded by the surface of the main body portion 2 towards the sealing ring 8, the outer side surface of the installation portion 3 and the inner wall of the installation port 91, and the good sealing performance between the breather valve and the installation port 91 is ensured.

[0075] The above specific embodiments are used to explain and illustrate the present application, rather than limit the present application, and any modification and change made to the present application within the spirit and protection scope of the claims of the present application all fall into the protection scope of the present application.

Claims

1. A vent valve, comprising, 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 unit includes: The connecting part is hollow and cylindrical, connected to the main body, and extends axially; Multiple claws are circumferentially spaced at the end of the connecting part to form gaps between adjacent claws, and the claws extend obliquely in a direction off the central axis.

2. The vent valve according to claim 1, characterized in that: The angle at which the inclined extension direction of the claw deviates from the central axis is 3-12°, and / or the axial length of the connecting part is H1 and the axial length of the claw is H2, then H1 / H2 is 0.15-0.

4.

3. The vent valve according to claim 1 or 2, characterized in that: The radial thickness of the claw gradually decreases from the starting end to the ending end; and / or, both the inner and outer surfaces of the claw extend obliquely, and the angle of inclination of the inner surface of the claw relative to the central axis is greater than the angle of inclination of its outer surface relative to the central axis.

4. The vent valve according to claim 3, characterized in that: The outer side of the claw includes a vertical section and an inclined section. The vertical section extends axially from the end of the connecting part, and the inclined section extends inclinedly from the end of the vertical section in a direction deviating from the central axis. The thickness of the connecting part is D1, and the thickness at the starting end of the inclined section on the outer side of the claw is D2, so D1 / D2 is 1.05-1.

2.

5. The vent valve according to claim 1, characterized in that: The circumferential width of the gap gradually increases from the starting end of the claw to the end, and the top surface of the gap is a curved surface that arches towards the direction of the connection.

6. The vent valve according to claim 1, characterized in that: The outer side of the end of the claw is provided with a locking block. The outer wall of the locking block has at least a guide surface and a fixing surface. The guide surface extends obliquely from the end of the claw toward the starting end and toward the direction deviating from the central axis. The fixing surface extends horizontally in the direction perpendicular to the central axis. And / or, the end of the claw has at least one circumferentially formed material shortage part.

7. The vent valve according to claim 1, characterized in that: The main body has an annular drainage area located on the outer periphery of the waterproof and breathable membrane, which extends obliquely from the inside out and away from the valve cover. The annular drainage area is provided with multiple snap-fit ​​parts spaced circumferentially, and the valve cover is provided with an axial limiting part for axially preventing disengagement from the snap-fit ​​parts.

8. The vent valve according to claim 1, characterized in that: A sealing ring is fitted around the outer periphery of the mounting part. The axial center of the sealing ring is located on a first plane, and the end of the connecting part is located on a second plane. The first plane is closer to the valve cover than the second plane.

9. The vent valve according to claim 8, characterized in that: The surface of the main body facing the sealing ring has a pressing surface and a clearance surface located outside the pressing surface. The radial width of the pressing surface is greater than the cross-sectional radius of the sealing ring, and the clearance surface extends radially outward from the pressing surface and inclined towards the valve cover.

10. A housing assembly, characterized in that: The device includes a housing with a mounting opening, a vent valve as described in any one of claims 1-7, and a sealing ring fitted around the outer periphery of the mounting portion. The mounting opening is flared and conical. The mounting portion of the vent valve is mounted at the mounting opening. The sealing ring is at least partially engaged within the mounting opening, and the sealing ring is subjected to compression from the surface of the main body facing the sealing ring, the outer side of the mounting portion, and the inner wall of the mounting opening.

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