Waterproof vent plug and vehicle

Abstract

The utility model provides a waterproof ventilation plug and a vehicle, and belongs to the technical field of vehicle waterproof ventilation parts, the waterproof ventilation plug comprises a ventilation plug main body and an oil blocking valve element, a main body ventilation seam is formed in the ventilation plug main body, and a labyrinth type oil blocking ventilation channel is combined, so that the oil drop content in airflow can be remarkably reduced, and the problem that a large amount of oil gas overflows is solved; and the condition that oil drops thrown out by the moving part are thrown out of the waterproof vent plug is also avoided. According to the waterproof vent plug, the oil blocking valve element and the vent plug body are arranged in a split mode and installed in a clamping mode through the installation elastic piece, the design difficulty of the vent plug body and the oil blocking valve element is lowered, and miniaturization design of the waterproof vent plug can be achieved easily. The supporting rib plate is arranged on the side, close to the main body ventilation seam, of the main body installation chamber, the supporting and limiting functions and the function of providing the oil guide ventilation space are integrated, and the structure of the ventilation plug body is simpler. And the first oil baffle plate is utilized to form the core ventilation seam, so that the condensation blocking effect on the oil gas is further optimized.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of waterproof and breathable parts of vehicles, and more particularly to a waterproof and breathable plug and a vehicle. BACKGROUND

[0002] When the transmission of a vehicle is working, the internal air pressure will change. For example, when the gear and other moving parts are working, the heat generated can make the internal gas of the transmission expand, and the internal air pressure of the transmission increases. After the gear and other moving parts stop moving, the temperature in the transmission gradually decreases, causing the internal gas to compress, and the internal air pressure of the transmission decreases. When the internal air pressure of the transmission increases, the internal gas needs to be discharged in time, and when the internal air pressure of the transmission decreases, the air needs to be appropriately introduced, so as to maintain the balance of the internal and external air pressures of the transmission, and avoid that the difference between the internal and external air pressures of the transmission is too large to affect the normal work and sealing performance of the transmission.

[0003] In order to adjust the internal and external pressure difference of the transmission, a breathable plug that can flow gas is usually installed on the transmission. The existing breathable plug is prone to the problem of oil being thrown out during use, which causes the breathable plug to leak oil and accelerates the loss of lubricating oil in the transmission. In addition, the existing breathable plug also has poor condensation effect on oil gas, and there is a problem of large oil gas overflow. The oil gas entraps small oil droplets, causing oil stains on the inner wall of the cabin after the oil gas is condensed in the cabin, which affects the internal environment of the cabin. CONTENT OF THE INVENTION

[0004] The purpose of the present application is to provide a waterproof and breathable plug and a vehicle, which aims to solve the problems of easy oil throwing and oil gas overflow of the existing transmission breathable plug, and improve the anti-oil throwing and condensation oil gas capacity of the breathable plug.

[0005] To achieve the above-mentioned purpose, the technical scheme adopted by the present application is:

[0006] In a first aspect, the present application provides a waterproof and breathable plug, comprising:

[0007] The breathable plug body has a main body air gap in communication with the internal cavity of the transmission, and a main body air port in communication with the external environment, and a main body mounting chamber is further formed between the main body air gap and the main body air port;

[0008] The oil blocking valve core is fixed in the main body mounting chamber, and the oil blocking valve core cooperates with the main body mounting chamber to form an oil blocking and breathable passage, the oil blocking and breathable passage is a constant-opening labyrinth passage, and the two ports of the oil blocking and breathable passage are in communication with the main body air gap and the main body air port, respectively;

[0009] The main body ventilation slit is disposed in a staggered manner with a corresponding port of the oil-blocking air passage in a direction perpendicular to the first direction.

[0010] The existing transmission breather plug is mainly divided into two types of normally open type and normally closed type, and the normally closed type is more widely used. The working principle of the normally closed type is roughly as follows: under normal circumstances, the breather plug is in a closed state, and if the pressure difference between the inside and outside of the transmission is too large, the side with larger pressure will push open the valve core of the breather plug to realize ventilation. The normally closed type breather plug is prone to damage to its own structure due to excessive pressure, and due to the limitation of its own structure, the air passage cross-sectional area of the breather plug is large, and it is difficult to block the oil gas. After the valve core is pushed open, it is also difficult to block the oil droplets thrown out.

[0011] For the normally open type breather plug, in addition to meeting the ventilation function, the design of the ventilation passage mainly considers blocking external water from entering the transmission through the breather plug, so the ventilation passage is designed as a winding and circuitous channel, but the cross-sectional area of the ventilation passage is still large, and it is difficult to meet the blocking demand of oil gas, and oil gas overflow is inevitable. In addition, under the condition that the internal moving parts of the transmission are working and the internal air pressure of the transmission is high, the oil droplets thrown out by the transmission structure enter the channel, and are easily thrown out of the breather plug under the action of their own inertia and gravity.

[0012] In order to solve the problem that the breather plug has poor blocking effect on oil gas and oil droplets, an oil blocking plate structure is designed in the transmission in the prior art, which leads to the problems of complex structure design of the transmission and difficult molding, which is not conducive to reducing production cost.

[0013] In order to solve the problem that the existing breather plug cannot block oil gas and oil droplets, the scheme shown in the embodiments of the present application compared with the prior art:

[0014] Firstly, in the scene of high air pressure inside the transmission and the need for exhaust, the gas carrying oil droplets first reaches the main vent slit. Since the width of the main vent slit is narrow, most of the oil droplets in the airflow directly collide with the peripheral structure of the inlet end of the main vent slit, condense on these structures, and do not enter the main vent slit with the airflow; the residual oil droplets in the airflow are more active in motion after entering the main vent slit due to the fast gas flow rate in the main vent slit, and the residual oil droplets are more likely to condense on the sidewall of the main vent slit, thereby consuming the oil droplets in the airflow for the second time; after entering the oil-blocking vent passage from the main vent slit, the gas flows in the passage needs to change direction multiple times, and each change of direction causes oil droplets to condense on the inner wall of the oil-blocking vent passage, thereby consuming the oil droplets in the airflow for the third time; after multiple consumption of the oil droplets, the content of oil droplets in the gas flow discharged from the main vent port is significantly reduced, thereby effectively improving the problem that oil spills easily cause oil stains on the inner wall of the cabin.

[0015] Secondly, when the moving parts inside the transmission are working, the probability of oil droplets being thrown into the main vent slit is low due to the existence of the narrow vent structure of the main vent slit, and even if oil droplets are thrown to the port of the main vent slit, the oil droplets are difficult to pass through the main vent slit, but flow back to the transmission along the sidewall of the main vent slit after entering the main vent slit, thereby effectively avoiding the situation that the oil droplets are thrown out of the waterproof vent plug through the oil-blocking vent passage.

[0016] In combination with the first aspect, in a possible implementation manner, the oil-blocking valve core is provided with a mounting spring plate on the side away from the main vent slit, the extension direction of the mounting spring plate forms an angle with the first direction; the main mounting chamber is provided with a clamping portion, and the mounting spring plate is clamped with the clamping portion to limit the displacement of the oil-blocking valve core in the first direction.

[0017] In the above technical solution, the oil-blocking valve core and the plug seat are formed respectively, and the manufacturing difficulty is low; at the same time, the mounting spring plate is smaller in size and occupies less space compared with the traditional buckle structure, and can effectively avoid the oil-blocking valve core from falling off after assembly, which is conducive to making the structure of the waterproof vent plug more compact.

[0018] In some embodiments, the main mounting chamber is provided with a plurality of support rib plates on the side close to the main vent slit, the support rib plates are used for supporting the oil-blocking valve core, and an oil-guiding vent passage is formed between adjacent two support rib plates.

[0019] In the above technical solution, the support rib plate integrates the support limiting function and the function of providing an oil-guiding vent space, so that the structure of the vent plug main body is simpler.

[0020] With reference to the first aspect, in a possible implementation manner, the oil blocking valve core comprises an intermediate connector and a plurality of oil blocking plates, the plurality of oil blocking plates are sleeved on the intermediate connector in a first direction, and a gas passage is formed between the outer periphery of the oil blocking plates and the side wall of the main body mounting chamber. In a direction perpendicular to the first direction, the gas passages on the adjacent two oil blocking plates are arranged in a staggered manner, so that the plurality of oil blocking plates and the main body mounting chamber cooperatively form the labyrinth oil blocking gas passage.

[0021] In the technical solution, the intermediate connector is used to connect the oil blocking plates, and the gas passages on the plurality of oil blocking plates are arranged in a staggered manner to form the labyrinth passage, so that the opening of the oil blocking valve core is stronger, the space between the adjacent two oil blocking plates is larger, and the gas flow is smoother.

[0022] In some embodiments, the oil blocking plate adjacent to the main body gas slit is a first oil blocking plate, a core body gas slit is formed between the outer periphery edge of the first oil blocking plate and the side wall of the main body mounting chamber, the core body gas slit is in communication with the main body gas slit, and the main body gas slit and the core body gas slit are arranged in a staggered manner in a direction perpendicular to the first direction.

[0023] In the technical solution, the core body gas slit provides a smaller gas passage area, the first oil blocking plate can further block the oil droplets in the gas flow, thereby effectively improving the consumption effect of the oil blocking valve core on the oil droplets, and the structure of the first oil blocking plate is simple, the fitting mode with the main body mounting chamber is also simple, and the design and manufacturing difficulty of the main body mounting chamber can be effectively reduced.

[0024] In some embodiments, the oil blocking plate located on the side of the first oil blocking plate away from the main body gas slit is a second oil blocking plate, the outer periphery edge of the second oil blocking plate abuts against the side wall of the main body mounting chamber, the edge of the second oil blocking plate further forms an oil blocking plate gap, the oil blocking plate gaps on the adjacent two second oil blocking plates are arranged in a staggered manner in the circumferential direction of the main body mounting chamber, the oil blocking plate gap and the side wall of the main body mounting chamber enclose the gas passage, and the gas passage formed by the second oil blocking plate adjacent to the main body gas slit is the gas outlet of the oil blocking gas passage.

[0025] In the technical solution, the gas passage is formed by the oil blocking plate gap on the second oil blocking plate, most of the gas flow can change direction after hitting the second oil blocking plate, and then flow to the corresponding oil blocking plate gap, further block the oil droplets in the gas flow, realize further consumption of the oil droplets in the gas flow, and thereby optimize the oil blocking effect of the oil blocking valve core.

[0026] With reference to the first aspect, in a possible implementation manner, the main body mounting chamber further comprises a flow guide inclined surface adjacent to the side of the main body mounting chamber close to the main body gas slit, and the flow guide inclined surface gradually inclines toward the main body gas slit from the outside to the inside.

[0027] In the technical solution, the inclined flow guide slope can effectively guide the oil to the main body vent, and thus more effectively realize the backflow of the oil.

[0028] With reference to the first aspect, in a possible implementation manner,

[0029] The vent plug body comprises:

[0030] A plug seat, which forms the main body vent and the main body mounting chamber inside, and further forms a seat body venting port on the side of the plug seat facing away from the main body vent and communicating with the main body mounting chamber;

[0031] A plug cover, which covers the seat body venting port;

[0032] On the side of the main body venting port facing away from the main body mounting chamber, the plug seat and the plug cover cooperate to form a water-blocking venting channel which is always open, the water-blocking venting channel is a labyrinth channel which is always open, and the outer port of the water-blocking venting channel is the main body venting port.

[0033] In the technical solution, the water-blocking venting channel is formed by cooperation of the plug seat and the plug cover, the always open structure can effectively meet the demand of airflow passing, and meanwhile, the problem of damage of components caused by pressure change is avoided, and the service life of the waterproof and venting plug is prolonged. In addition, the labyrinth design of the water-blocking venting channel greatly increases the difficulty of external water entering the main body mounting chamber, and effectively blocks water.

[0034] In some embodiments, the side of the main body mounting chamber facing away from the main body venting port forms a mounting gap, and the periphery of the mounting gap forms the seat body venting port;

[0035] The plug cover comprises:

[0036] A cover plate, which is arranged at the mounting gap and integrally connected with the plug seat;

[0037] A surrounding plate, which is arranged around the outer periphery of the cover plate and spaced from the plug seat inside and outside, and the water-blocking venting channel is formed between the plug seat and the surrounding plate.

[0038] In the technical solution, the waterproof effect of the water-blocking venting channel is reliable, and the connection between the cover plate and the plug seat is realized by the integrally connected manner, without the need to further arrange a clamping structure or the like, the space occupied by the connection is small, which is conducive to compact design of the waterproof and venting plug, and there is no gap between the plug cover and the plug seat due to up-and-down jumping, and the waterproof effect is further strengthened.

[0039] In the second aspect, the embodiments of the present application further provide a vehicle comprising the waterproof and venting plug.

[0040] In the above technical solution, by using the aforementioned waterproof and breathable plug, the problem of excessive leakage from the vent plug of the transmission can be effectively improved, preventing the formation of oil condensate on the inner wall of the engine compartment, and also preventing oil droplets from splashing out and causing oil leakage. This reduces the rate of lubricant loss in the transmission, thereby reducing the failure rate of the transmission and improving the overall quality of the vehicle. Attached Figure Description

[0041] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0042] Figure 1 This is a schematic diagram of the structure of the waterproof and breathable plug provided in Embodiment 1 of this application;

[0043] Figure 2 This is a cross-sectional view of the internal structure of the waterproof and breathable plug provided in Embodiment 1 of this application;

[0044] Figure 3 for Figure 2 Enlarged view of part C;

[0045] Figure 4 A schematic diagram of the gas flow path of the waterproof and breathable plug provided in Embodiment 1 of this application in the exhaust state;

[0046] Figure 5 for Figure 2 AA section view;

[0047] Figure 6 for Figure 2 BB section view;

[0048] Figure 7 This is a schematic diagram of the plug seat used in Embodiment 1 of this application;

[0049] Figure 8 for Figure 7 Top view of the three-dimensional structure of the middle stopper;

[0050] Figure 9 This is a schematic diagram of the oil baffle valve core used in Embodiment 1 of this application;

[0051] Figure 10 This is an exploded cross-sectional view of the waterproof and breathable plug provided in Embodiment 1 of this application;

[0052] Figure 11 This is a schematic diagram of the assembly structure of the oil baffle valve core and the mounting spring used in Embodiment 2 of this application.

[0053] In the figure: 100, air vent plug main body; 1, main body air vent; 2, main body air vent; 3, main body mounting chamber; 310, diversion slope; 320, mounting clearance; 4, oil blocking valve core; 410, intermediate connector; 420, oil blocking plate; 421, first oil blocking plate; 422, second oil blocking plate; 4221, oil blocking plate gap; 5, oil blocking air passage; 6, mounting spring; 610, second clamping flange; 7, clamping portion; 8, support rib plate; 9, oil guiding air passage; 10, plug seat; 1010, seat body air vent; 1020, first seat body boss; 1030, second seat body boss; 11, plug cover; 1110, cover plate; 1120, fence; 13, water blocking air passage; 14, first buffer passage; 15, second buffer passage; 16, first transition surface; 17, second transition surface; 18, core body air vent; 19, adapter; 20, water blocking plate; 2010, water blocking plate gap; 21, seat body mounting buckle; 22, sealing ring; 23, clamping ring groove. DETAILED DESCRIPTION

[0054] In order to make the technical problems to be solved by the present application, the technical solutions and beneficial effects clearer, the present application will be further described in detail below in conjunction with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not intended to limit the present application.

[0055] It should be noted that when an element is referred to as "being disposed on" another element, it can be directly on the other element or indirectly on the other element. It should be understood that the terms "length", "width", "upper", "lower", "front", "back", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0056] The terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "several" is two or more, unless otherwise explicitly and specifically limited.

[0057] Please refer to Figures 1 to 11The waterproof and breathable plug provided by the application is described. The waterproof and breathable plug comprises a breathable plug body 100 and an oil blocking valve core 4. The breathable plug body 100 has a body air gap 1 in communication with the transmission cavity and a body air gap 2 in communication with the external environment. A body mounting chamber 3 is formed between the body air gap 1 and the body air gap 2. The oil blocking valve core 4 is fixed in the body mounting chamber 3. The oil blocking valve core 4 and the body mounting chamber 3 cooperate to form an oil blocking and breathable passage 5. The oil blocking and breathable passage 5 is a normally open labyrinth passage. The two ports of the oil blocking and breathable passage 5 are in communication with the body air gap 1 and the body air gap 2, respectively. The distribution direction of the body air gap 1 and the body mounting chamber 3 is the first direction. In the direction perpendicular to the first direction, the body air gap 1 and the corresponding port of the oil blocking and breathable passage 5 are arranged in a staggered manner.

[0058] It should be noted that the direction perpendicular to the first direction can be a direction parallel to the radial direction of the body mounting chamber 3 or a circumferential direction of the body mounting chamber 3, which is not limited herein.

[0059] In this embodiment, the breathable plug body 100 is installed at the top of the transmission and corresponds to the gear shifting mechanism. The first direction is parallel to the up-down direction of the vehicle body, or the first direction is arranged at an angle to the lower direction of the vehicle body, and the angle is less than 90° to meet the air ventilation and prevent oil droplets from being thrown out. For example, the body mounting chamber 3 is located above the body air gap 1.

[0060] In this embodiment, the cross section of the body mounting chamber 3 can be circular, square or other shapes, and the outer contour of the oil blocking valve core 4 is arranged in the shape of the cross section of the body mounting chamber 3. This embodiment exemplarily shows an embodiment in which the cross section of the body mounting chamber 3 is circular and the outer contour of the oil blocking valve core 4 is circular.

[0061] The existing transmission breathable plug is mainly divided into two types of normally open type and normally closed type. The normally closed type breathable plug is widely used, and its working principle is roughly as follows: under normal circumstances, the breathable plug is in a closed state, and if the pressure difference between the inside and outside of the transmission is too large, the side with larger pressure will push open the valve core of the breathable plug to realize air ventilation. The normally closed type breathable plug is prone to damage the structure of the breathable plug due to excessive pressure, and due to the limitation of the structure of the breathable plug, the air passage cross section area is large, it is difficult to block the oil gas, and it is also difficult to block the oil droplets thrown out after the valve core is pushed open.

[0062] For the normally open breather plug, the design of the air passage mainly considers blocking the external water from entering the transmission through the breather plug in addition to meeting the ventilation function, so the air passage is designed as a winding and circuitous channel, but the cross-sectional area of the air passage is still large, which is difficult to meet the blocking demand of oil and gas, and the oil and gas overflow is inevitable. In addition, when the internal moving parts of the transmission are working and the internal air pressure of the transmission is high, the oil droplets thrown out by the transmission structure enter the channel, and are easily thrown out of the breather plug under the action of their own inertia and gravity.

[0063] In order to solve the problem of poor blocking effect of the breather plug on oil and gas and oil droplets, the prior art also designs an oil blocking plate structure in the transmission, which leads to the problems of complex transmission structure design and difficult molding, which is not conducive to reducing production cost.

[0064] In order to solve the problem that the existing breather plug cannot block oil and gas and oil droplets, the waterproof breather plug provided by the present application has the following advantages compared with the prior art:

[0065] Firstly, in the scene where the internal air pressure of the transmission is high and needs to be exhausted, the gas carrying oil droplets first reaches the main air gap 1. Since the width of the main air gap 1 is narrow, most of the oil droplets in the gas flow directly collide with the peripheral structure of the inlet end of the main air gap 1 and condense on these structures, and will not enter the main air gap 1 with the gas flow; after the residual oil droplets in the gas flow enter the main air gap 1, since the gas flow rate in the main air gap 1 is fast, the oil droplets move more actively, and the residual oil droplets are more likely to condense on the side wall of the main air gap 1, thereby consuming the oil droplets in the gas flow for the second time; after entering the oil-blocking breather channel 5 from the main air gap 1, since the oil-blocking breather channel 5 is a labyrinth channel, the gas flow needs to change direction multiple times in the channel, and each change of direction causes oil droplets to condense on the inner wall of the oil-blocking breather channel 5, thereby consuming the oil droplets in the gas flow for the third time; after multiple consumptions of the oil droplets, the oil droplet content in the gas flow exhausted from the main air gap 2 is significantly reduced, thereby effectively improving the problem that oil and gas overflow causes oil stains to easily appear on the internal wall of the cabin.

[0066] Secondly, when the internal moving parts of the transmission are working, due to the existence of the narrow air gap structure of the main air gap 1, the probability of the oil droplets thrown into the main air gap 1 is low, and even if the oil droplets are thrown to the port of the main air gap 1, the oil droplets are difficult to pass through the main air gap 1, but will flow back to the transmission along the side wall of the main air gap 1 after entering the main air gap 1, thereby effectively avoiding the situation that the oil droplets are thrown out of the waterproof breather plug through the oil-blocking breather channel 5.

[0067] Again, since the oil-blocking air passage 5 adopts the design of always open, there is no case of using pressure to open the valve core when the exhaust, and further, the problem of damage to the valve core structure due to excessive pressure can be avoided, effectively prolonging the service life of the waterproof air vent plug. In addition, in the case of low internal pressure of the transmission and the need for air intake, external gas enters the transmission case through the main body air inlet 2, the oil-blocking air passage 5 and the main body air gap 1 in turn. The always open oil-blocking air passage 5 can meet the air intake demand, so that the waterproof air vent plug can meet the demand of adjusting the balance between the internal and external air pressure of the transmission.

[0068] Finally, since the waterproof air vent plug itself can meet the blocking demand for oil and gas and the oil droplets thrown out, there is no need to additionally set an oil-blocking rib plate on the transmission, thereby reducing the design and manufacturing difficulty of the transmission and being conducive to reducing production costs.

[0069] In some embodiments, referring to Figure 2 , the second buffer passage 15 is arranged between the main body air gap 1 and the main body mounting chamber 3, and the first buffer passage 14 is arranged on the side of the main body air gap 1 away from the main body mounting chamber 3. The width of the first buffer passage 14 and the width of the second buffer passage 15 are both greater than the width of the main body air gap 1, and the width of the first buffer passage 14 and the width of the second buffer passage 15 are both less than the width of the main body mounting chamber 3. The width of the first buffer passage 14 can be equal to or different from the width of the second buffer passage 15. Taking the exhaust scene as an example, the functions of the first buffer passage 14 and the second buffer passage 15 are described: the gas first enters the first buffer passage 14, and a high-pressure gas environment is gradually formed in the first buffer passage 14. Under the action of high pressure, the gas in the first buffer passage 14 can flow more smoothly into the main body air gap 1, and the first transition surface 16 between the first buffer passage 14 and the main body air gap 1 blocks most of the oil droplets mixed in the gas. After the gas flow flows out of the main body air gap 1, it enters the wider second buffer passage 15, and the gas flow rate decreases rapidly. The second buffer passage 15 buffers the gas flow, so that the gas can flow more gently to the oil-blocking air passage 5. In addition, the first transition surface 16 also blocks the oil droplets mixed in the gas flow and the oil droplets thrown out by the moving parts. The first transition surface 16 is the aforementioned "peripheral structure of the gas inlet end of the main body air gap 1".

[0070] Optionally, the second transition surface 17 between the second buffer passage 15 and the main body air gap 1 is perpendicular to the first direction, or the second transition surface 17 gradually inclines toward the main body mounting chamber 3 in the direction from inside to outside. Wherein, "inside" refers to the direction toward the axis of the first buffer passage 14, and vice versa. After the blocked oil droplets in the oil-blocking air passage 5 flow back to the second transition surface 17, the oil droplets can flow back to the transmission along the main body air gap 1 under the action of the continuous accumulation of the oil droplets and gravity, realizing the recovery of the lubricating oil.

[0071] Optionally, the cross sections of the first buffer channel 14 and the second buffer channel 15 are circular, and the side walls of the first buffer channel 14 and the second buffer channel 15 are relatively smooth without corners, so that the probability of oil dirt condensing in the first buffer channel 14 or the second buffer channel 15 is reduced, and the buffer channels are prevented from being blocked.

[0072] The existing transmission breather plug mainly includes a plug body and a plug cap. Some types of breather plugs form a valve core structure in the plug body by integral molding or the like, which is difficult to manufacture and form. The present embodiment provides a mounting mode of the oil blocking valve core 4. Referring to Figure 2 , the oil blocking valve core 4 is provided with a mounting spring 6 on the side away from the main body vent slit 1, and the extension direction of the mounting spring 6 forms an angle with the first direction. The main body mounting chamber 3 is provided with a clamping portion 7, and the mounting spring 6 is clamped with the clamping portion 7 to limit the displacement of the oil blocking valve core 4 in the first direction. The mounting spring 6 is integrally integrated with the oil blocking valve core 4, and when mounting, the oil blocking valve core 4 is inserted into the main body mounting chamber 3. After the oil blocking valve core 4 is inserted into position, the mounting spring 6 is clamped and limited with the clamping portion 7. In the present embodiment, the oil blocking valve core 4 and the breather plug body 100 are designed separately, and the mounting is realized by the clamping mode of the mounting spring 6 and the clamping portion 7. The oil blocking valve core 4 and the plug seat 10 are formed respectively, and the manufacturing difficulty is relatively low. At the same time, compared with the traditional buckle structure, the mounting spring 6 is smaller in size and occupies less space. Without the need to greatly expand the volume of the main body mounting chamber 3 or increase the complex mounting structure, the assembly of the oil blocking valve core 4 can also be realized, the oil blocking valve core 4 is prevented from falling off, and it is conducive to making the structure of the waterproof breather plug more compact.

[0073] The adaptation mode of the mounting spring 6 and the clamping portion 7 is as follows:

[0074] 1) The clamping portion 7 is a mounting protrusion provided on the side wall of the main body mounting chamber 3, and the mounting spring 6 is integrated on the oil blocking valve core 4 and extends in the direction away from the oil blocking valve core 4, as shown in Figure 2 and Figure 9 . When mounting, the oil blocking valve core 4 is first inserted into the main body mounting chamber 3. With the insertion of the oil blocking valve core 4 and the mounting spring 6, the mounting spring 6 is extruded by the mounting protrusion and inclined towards the central axis of the oil blocking valve core 4. After the oil blocking valve core 4 is deeply inserted and limited by the bottom of the main body mounting chamber 3, the free end of the mounting spring 6 abuts against the side of the mounting protrusion towards the main body vent slit 1, thereby limiting the upward movement of the oil blocking valve core 4 and effectively limiting the oil blocking valve core 4 in the up-down direction.

[0075] In implementation, to ensure the uniformity of force on the oil blocking valve core 4 after clamping, the mounting spring 6 has multiple, and the multiple mounting springs 6 are uniformly distributed around the central axis of the oil blocking valve core 4. Alternatively, the mounting spring 6 is continuously arranged around the central axis of the oil blocking valve core 4 and is a continuous distribution type spring in a horn shape. On this basis, to reduce the alignment difficulty of the mounting protrusion and the mounting spring 6, the mounting protrusion is a ring-shaped protrusion continuously distributed along the circumference of the main body mounting chamber 3.

[0076] 2) The clamping part 7 is a first mounting groove arranged on the side wall of the main body mounting chamber 3. The mounting spring 6 is integrated on the oil blocking valve core 4 and extends in a direction away from the oil blocking valve core 4. The free end of the mounting spring 6 is bent outward (i.e. in a direction away from the central axis of the oil blocking valve core 4) to form a first clamping flange. In installation, the oil blocking valve core 4 is first inserted into the main body mounting chamber 3. With the insertion of the oil blocking valve core 4 and the mounting spring 6, the first clamping flange is pressed by the side wall of the main body mounting chamber 3, so that the mounting spring 6 is inclined towards the central axis of the oil blocking valve core 4. After the oil blocking valve core 4 is deeply inserted and is limited by the bottom of the main body mounting chamber 3, the first clamping flange is clamped into the first mounting groove, thereby limiting the upward movement of the oil blocking valve core 4 and achieving effective limiting of the oil blocking valve core 4 in the up-down direction.

[0077] In implementation, to ensure the uniformity of force on the oil blocking valve core 4 after clamping, the mounting spring 6 has multiple, and the multiple mounting springs 6 are uniformly distributed around the central axis of the oil blocking valve core 4. On this basis, to reduce the alignment difficulty of the first mounting groove and the first clamping flange, the first mounting groove is a ring groove continuously distributed along the circumference of the main body mounting chamber 3.

[0078] 3) The clamping part 7 is a second mounting groove arranged on the side wall of the main body mounting chamber 3. The mounting spring 6 is integrated on the oil blocking valve core 4 and extends in a direction towards the oil blocking valve core 4. The free end of the mounting spring 6 is bent outward (i.e. in a direction away from the central axis of the oil blocking valve core 4) to form a second clamping flange 610, as shown in FIG. 6. Figure 11 In installation, the mounting spring 6 is pressed by hand to make the mounting spring 6 close to the oil blocking valve core 4 and avoid the main body mounting chamber 3. After the oil blocking valve core 4 is deeply inserted and is limited by the bottom of the main body mounting chamber 3, the restriction on the mounting spring 6 is released. At this time, the elastic potential energy of the mounting spring 6 is released, the free end of the mounting spring 6 swings outward, the second clamping flange 610 is clamped into the second mounting groove, thereby limiting the upward movement of the oil blocking valve core 4 and achieving effective limiting of the oil blocking valve core 4 in the up-down direction.

[0079] In implementation, in order to ensure the uniformity of force on the oil blocking valve core 4 after clamping, the installation spring 6 has multiple, and the multiple installation springs 6 are uniformly distributed around the central axis of the oil blocking valve core 4. On this basis, in order to reduce the alignment difficulty of the second installation groove and the second clamping flange 610, the second installation groove is a ring groove continuously distributed along the circumference of the main body installation chamber 3. More specifically, in order to enable the installation spring 6 to more effectively avoid the side wall of the main body installation chamber 3 during installation, the top of the oil blocking valve core 4 protrudes and is provided with a connecting portion 19. The connecting portion 19 is located at the middle of the oil blocking valve core 4, and the length of the connecting portion 19 is substantially the same as the length of the installation spring 6. When the installation spring 6 is pressed inward, the installation spring 6 will not be in contact with the oil blocking valve core 4. After the pressing force is removed, the installation spring 6 can also be freely popped out.

[0080] 4) The clamping portion 7 is a third installation groove provided on the side wall of the main body installation chamber 3. The installation spring 6 is integrated on the oil blocking valve core 4 and extends in a direction perpendicular to the first direction. During installation, the oil blocking valve core 4 is first inserted into the main body installation chamber 3. With the insertion of the oil blocking valve core 4 and the installation spring 6, the installation spring 6 is pressed by the installation protrusion and inclined away from the main body ventilation slot 1. After the oil blocking valve core 4 is deeply inserted and in contact with the bottom of the main body installation chamber 3 for limiting, the outer end of the installation spring 6 is clamped into the third installation groove, thereby limiting the upward movement of the oil blocking valve core 4 and achieving effective limiting of the oil blocking valve core 4 in the up-down direction.

[0081] In implementation, in order to ensure the uniformity of force on the oil blocking valve core 4 after clamping, the installation spring 6 has multiple, and the multiple installation springs 6 are uniformly distributed around the central axis of the oil blocking valve core 4. On this basis, in order to reduce the alignment difficulty of the second installation groove and the second clamping flange 610, the second installation groove is a ring groove continuously distributed along the circumference of the main body installation chamber 3. More specifically, in order to enable the installation spring 6 to more effectively avoid the side wall of the main body installation chamber 3 during installation, the top of the oil blocking valve core 4 protrudes and is provided with a connecting portion 19. The connecting portion 19 is located at the middle of the oil blocking valve core 4, and the length of the connecting portion 19 is substantially the same as the length of the installation spring 6. When the installation spring 6 is pressed inward, the installation spring 6 will not be in contact with the oil blocking valve core 4. After the pressing force is removed, the installation spring 6 can also be freely popped out.

[0082] In some embodiments, referring to Figure 2 , Figure 8 and Figure 10The main body installation chamber 3 is provided with a plurality of support rib plates 8 near one side of the main body air gap 1, and the support rib plates 8 are used to support the oil blocking valve core 4. The side of the oil blocking valve core 4 facing the main body air gap 1 is supported and limited in this way, so that the number of installation spring sheets 6 can be reduced, and the clamping structure is further simplified. On this basis, the oil guiding and air guiding channel 9 is formed between the adjacent two support rib plates 8. In the exhaust state, the airflow can flow into the oil blocking and air guiding channel 5 along the oil guiding and air guiding channel 9, and the oil and gas can also flow back into the transmission along the oil guiding and air guiding channel 9. In the intake state, the airflow flowing out of the oil blocking and air guiding channel 5 can flow into the transmission along the oil guiding and air guiding channel 9, and finally meet the requirements of intake and oil guiding. In addition, the support rib plate 8 also plays a shunt role, and the oil droplet backflow is more gentle, avoiding the blockage of the main body air gap 1. It can be seen that the support rib plate 8 integrates the support and limiting functions and provides the oil guiding and air guiding space, so that the structure of the air plug main body 100 is more simple.

[0083] In some support rib plate 8 and oil blocking valve core 4 adaptation modes, the support rib plate 8 and the oil blocking valve core 4 are in surface contact, that is, the top surface of the support rib plate 8 is attached to the bottom surface of the oil blocking valve core 4, so that a more stable support effect can be obtained. In specific implementation, if the bottom surface of the oil blocking valve core 4 is a plane, the top surface of the support rib plate 8 is a plane, and if the bottom surface of the oil blocking valve core 4 is a curved surface, the top surface of the support rib plate 8 is a curved surface.

[0084] In another support rib plate 8 and oil blocking valve core 4 adaptation mode, the support rib plate 8 and the oil blocking valve core 4 are in point contact, that is, the top surface of the support rib plate 8 is provided with a plurality of contact protrusions (for example, point-shaped protrusions), and the contact protrusions are in contact with the bottom surface of the oil blocking valve core 4. The reliability of the support is ensured by the multi-point contact mode, and at the same time, the contact area between the support rib plate 8 and the oil blocking valve core 4 is small, so that the abnormal sound generated by vibration and friction can be reduced. Of course, the contact protrusions can also be arranged on the bottom surface of the oil blocking valve core 4, and at this time, the contact protrusions are ring-shaped protrusions, which are in contact with the top surface of the support rib plate 8, and the effect is similar to the foregoing scenario, which will not be described here.

[0085] In some embodiments, referring to Figure 2 , Figures 9 to 11The oil blocking valve core 4 comprises an intermediate connecting body 410 and a plurality of oil blocking plates 420, the plurality of oil blocking plates 420 are sleeved on the intermediate connecting body 410 in the first direction, the outer periphery of the oil blocking plate 420 and the side wall of the main body mounting chamber 3 form an air passage, in the direction perpendicular to the first direction, the air passages on the adjacent two oil blocking plates 420 are arranged in a staggered manner, so that the plurality of oil blocking plates 420 and the main body mounting chamber 3 cooperate to form a labyrinth oil blocking air passage 5. Wherein, the intermediate connecting body 410 and the oil blocking plate 420 are integrally formed by casting or other processes, or the intermediate connecting body 410 and the oil blocking plate 420 are formed separately, and then connected by clamping. The intermediate connecting body 410 connects each oil blocking plate 420 in this embodiment, and the air passages on the plurality of oil blocking plates 420 are arranged in a staggered manner to form a labyrinth passage, so that the openness of the oil blocking valve core 4 is stronger, the space between the adjacent two oil blocking plates 420 is larger, and the gas flow is more smooth.

[0086] Optionally, the intermediate connecting body 410 is rod-shaped and located at the center of the baffle, which can conveniently arrange the mounting spring 6 on the intermediate connecting body 410, thereby ensuring that the installed oil blocking valve core 4 is uniformly stressed. In addition, the rod-shaped intermediate connecting body 410 can also occupy the space between the adjacent two oil blocking plates 420, thereby making the air passage more smooth.

[0087] On the basis that the oil blocking valve core 4 comprises an intermediate connecting body 410 and a plurality of oil blocking plates 420, referring to Figure 2 , Figure 4 and Figure 10 , the oil blocking plate 420 adjacent to the main body air passage 1 is a first oil blocking plate 421, the outer peripheral edge of the first oil blocking plate 421 and the side wall of the main body mounting chamber 3 form a core air passage 18, the core air passage 18 is communicated with the main body air passage 1, and the main body air passage 1 and the core air passage 18 are arranged in a staggered manner in the direction perpendicular to the first direction. Wherein, the width of the core air passage 18 gap is 1mm~2mm (for example, 1.2mm, 1.5mm, 1.8mm). The width of the core air passage 18 gap of the embodiment is small, the air passage area provided is small, the first oil blocking plate 421 can further block the oil droplets in the airflow, thereby effectively improving the consumption effect of the oil blocking valve core 4 on the oil droplets, and the structure of the first oil blocking plate 421 is simple, the adaptation mode with the main body mounting chamber 3 is also simple, which can effectively reduce the design and manufacturing difficulty of the main body mounting chamber 3.

[0088] Optionally, the core air passage 18 is a ring-shaped gap continuously distributed along the circumference of the first oil blocking plate 421; or the core air passage 18 is provided with a plurality of core air passages 18, and the plurality of core air passages 18 are distributed in a spaced manner around the circumference of the first oil blocking plate 421.

[0089] On the basis of having the first oil blocking plate 421, referring to Figure 2 ,Figures 4 to 6 、 Figures 9 to 11 The second oil baffle plate 422 is located on the side of the first oil baffle plate 421 away from the main body air gap 1, and is in transition fit with the main body mounting chamber 3 to realize the abutment of the outer peripheral edge of the second oil baffle plate 422 with the side wall of the main body mounting chamber 3. The edge of the second oil baffle plate 422 further forms an oil baffle plate gap 4221. In the circumferential direction of the main body mounting chamber 3, the oil baffle plate gaps 4221 on the adjacent two second oil baffle plates 422 are arranged in a staggered manner. The oil baffle plate gap 4221 and the side wall of the main body mounting chamber 3 form an air passage, and the air passage formed by the second oil baffle plate 422 adjacent to the main body air gap 2 is the air outlet of the oil-proof air passage 5. The opening depth of the oil baffle plate gap 4221 is greater than the width of the core air gap 18. In this embodiment, the air passage is formed by the oil baffle plate gap 4221 on the second oil baffle plate 422. Most of the airflow can change direction after hitting the second oil baffle plate 422, and then flow to the corresponding oil baffle plate gap 4221, further blocking the oil droplets in the airflow, further consuming the oil droplets in the airflow, and further optimizing the oil blocking effect of the oil blocking valve core 4. In addition, in the air inlet state, the second oil baffle plate 422 can buffer the airflow to ensure the smoothness of the airflow flowing into the transmission, and avoid abnormal noise caused by turbulent flow.

[0090] Optionally, the second oil baffle plate 422 is provided with a plurality of oil baffle plate gaps 4221, and the plurality of oil baffle plate gaps 4221 are uniformly distributed along the circumference of the second oil baffle plate 422, thereby improving the air passage flow.

[0091] Optionally, the oil baffle plate gap 4221 is a fan-shaped gap, which reduces the opening difficulty and also obtains a larger opening area. More specifically, the inner end of the oil baffle plate gap 4221 extends to the outer circumferential surface of the intermediate connecting body 410, so that the second oil baffle plate 422 is divided into a plurality of blade-shaped members by the oil baffle plate gap 4221, thereby maximizing the opening area of the oil baffle plate gap 4221.

[0092] In some embodiments, referring to Figure 2 and Figure 9 , the side of the main body mounting chamber 3 adjacent to the main body air gap 1 is further formed with a flow guide inclined surface 310, which gradually inclines toward the main body air gap 1 from the outside to the inside. The inclined flow guide inclined surface 310 can effectively guide the oil to the main body air gap 1, thereby more effectively realizing the backflow of the oil.

[0093] In some embodiments, referring to Figures 1 to 8 and Figure 10The vent plug body 100 comprises a plug base 10 and a plug cover 11. The plug base 10 is internally formed with a body vent slot 1 and a body mounting chamber 3. The side of the plug base 10 away from the body vent slot 1 is further formed with a base body vent port 1010 which is in communication with the body mounting chamber 3. The plug cover 11 covers the base body vent port 1010. On the side of the body vent port 2 away from the body mounting chamber 3, the plug base 10 cooperates with the plug cover 11 to form a normally open water-blocking vent passage 13. The water-blocking vent passage 13 is a normally open labyrinth passage, and the outer port of the water-blocking vent passage 13 is the body vent port 2. In this embodiment, the water-blocking vent passage 13 is formed by the cooperation of the plug base 10 and the plug cover 11. The normally open structure can effectively meet the demand of airflow passing, and at the same time, avoid the damage of components caused by pressure changes, thereby prolonging the service life of the waterproof and venting plug. In addition, the labyrinth design of the water-blocking vent passage 13 greatly increases the difficulty of external water entering the body mounting chamber 3, thereby effectively blocking water.

[0094] On the basis of the above embodiment, referring to Figure 2 and Figure 10 , the side of the body mounting chamber 3 away from the body vent slot 1 is formed with a mounting gap 320, and the periphery of the mounting gap 320 is formed with a base body vent port 1010. The plug cover 11 comprises a cover plate 1110 and a surrounding plate 1120. The cover plate 1110 is arranged at the mounting gap 320 and is integrally connected with the plug base 10. The surrounding plate 1120 is arranged around the outer periphery of the cover plate 1110 and is spaced apart from the inside and outside of the plug base 10. The water-blocking vent passage 13 is formed between the plug base 10 and the surrounding plate 1120. In this embodiment, the water-blocking vent passage 13 and the oil-blocking vent passage 5 are arranged in a radial direction of the body mounting chamber 3, and the body vent port 2 is located at the lower end of the water-blocking vent passage 13. In the air intake state, even if water enters the body vent port 2, under the action of gravity, water droplets are difficult to flow upward along the water-blocking vent passage 13, which is the first layer of guarantee for effective water blocking. Even if water droplets move upward under the action of inertial impact, under the action of the labyrinth water-blocking vent passage 13, the water droplets are blocked and difficult to reach the base body vent port 1010, which is the second layer of guarantee for effective water blocking. Under the action of the double guarantees, the waterproof effect is significantly improved. In addition, the mounting gap 320 is arranged in the body mounting chamber 3 to facilitate the assembly of the oil-blocking valve core 4. On this basis, the cover plate 1110 and the plug base 10 are connected by integral connection (such as integral welding, integral bonding), without the need to set a clamping structure, the connection occupies less space, which is conducive to the compact design of the waterproof and venting plug. In addition, there is no gap between the plug cover 11 and the plug base 10, which avoids the entry of external water from the gap between the cover plate 1110 and the plug base 10, and avoids the leakage of oil and gas from the gap, thereby improving the waterproof reliability.

[0095] Optionally, the cover plate 1110 is integrally connected with the plug seat 10, for example, as follows: 1) the cover plate 1110 and the plug seat 10 are engineering plastics (such as polyimide, polyhydroxyalkanoate, polyether ether ketone, polyamide 66), and the welding of the two is realized by ultrasonic welding; 2) the cover plate 1110 and the plug seat 10 are metal materials (such as stainless steel, aluminum alloy), and the welding of the two is realized by laser welding; 3) the cover plate 1110 and the plug seat 10 are thermoplastic plastics (such as polybutylene terephthalate fiber, polyformaldehyde), and the welding of the two is realized by laser welding.

[0096] In some embodiments, referring to Figure 2 , Figure 8 and Figure 10 , in order to form a labyrinth water-blocking air-permeable channel 13 between the enclosure 1120 and the plug seat 10, the following implementation scheme can be adopted:

[0097] 1) A plurality of water-blocking plates 20 are arranged on the outer periphery of the plug seat 10, the plurality of water-blocking plates 20 are distributed at intervals along the first direction, the outer peripheral edge of the water-blocking plate 20 is transitionally fitted (or interference fitted) with the inner plate surface of the enclosure 1120, the edge of the water-blocking plate 20 is provided with a water-blocking plate gap 2010, the water-blocking plate gap 2010 cooperates with the inner plate surface of the enclosure 1120 to form a water-blocking air-permeable port, and in a direction perpendicular to the first direction, the water-blocking plate gaps 2010 on the adjacent two water-blocking plates 20 are arranged in a staggered manner, thereby forming a labyrinth water-blocking air-permeable channel 13.

[0098] 2) A plurality of water-blocking plates 20 are arranged on the inner plate surface of the enclosure 1120, the plurality of water-blocking plates 20 are distributed at intervals along the first direction, the outer peripheral edge of the water-blocking plate 20 is transitionally fitted (or interference fitted) with the outer peripheral surface of the plug seat 10, the edge of the water-blocking plate 20 is provided with a water-blocking plate gap 2010, the water-blocking plate gap 2010 cooperates with the outer peripheral surface of the plug seat 10 to form a water-blocking air-permeable port, and in a direction perpendicular to the first direction, the water-blocking plate gaps 2010 on the adjacent two water-blocking plates 20 are arranged in a staggered manner, thereby forming a labyrinth water-blocking air-permeable channel 13.

[0099] Figure 4 The flow path of the airflow in the waterproof air-permeable plug in the exhaust state is shown, and the airflow passes through the main body air-permeable slot 1, the oil-guiding air-permeable channel 9, the core body air-permeable slot 18, the oil-blocking plate gap 4221, the seat body air-permeable port 1010, the water-blocking air-permeable channel 13, and the main body air-permeable port 2 in sequence, and is finally discharged from the waterproof air-permeable plug. The flow path in the intake state is opposite to that in the exhaust state, and will not be described here.

[0100] In some embodiments, referring to Figures 1 to 8 and Figure 10The outer periphery of the plug seat 10 is provided with a first seat boss 1020. After the plug cover 11 is installed, there is a certain gap between the bottom of the surrounding plate 1120 and the first seat boss 1020, which is the main vent 2. The bottom of the first seat boss 1020 is provided with a seat mounting buckle 21, which is adapted to the mounting slot opened on the transmission housing. After assembly, the snap-fit ​​protrusion of the seat mounting buckle 21 and the first seat boss 1020 cooperate to limit the movement on both the inner and outer sides of the mounting slot, effectively preventing the plug seat 10 from moving after installation. At the same time, it also avoids setting up complex assembly structures on the transmission and the plug seat 10, thereby effectively reducing the assembly difficulty. In addition, the presence of the first seat boss 1020 also serves to isolate the water-blocking and venting channel 13 from the mounting slot of the transmission, improving the reliability of use. In practice, the gap between the enclosure 1120 and the first seat boss 1020 is 0.5mm to 2mm (e.g., 1mm or 1.5mm) to avoid the gap being too large and affecting the water-blocking performance, and also to avoid the gap being too small and affecting the air permeability. In addition, after the seat mounting buckle 21 is assembled with the mounting slot, it has a certain pulling force (greater than 50N).

[0101] Based on the above embodiments, see Figure 2 and Figure 3 The plug seat 10 is further provided with a second seat boss 1030 on its outer periphery. The outer diameter of the second seat boss 1030 is smaller than the outer diameter of the first seat boss 1020. After the plug cover 11 is installed, the surrounding plate 1120 surrounds the outer periphery of the second seat boss 1030, and there is a certain gap between the two. The gap between the surrounding plate 1120 and the top surface of the first seat boss 1020 and the gap between the surrounding plate 1120 and the outer periphery of the second seat boss 1030 form an L-shaped gap channel, which further improves the waterproof effect. Optionally, the width of the gap between the surrounding plate 1120 and the outer periphery of the second seat boss 1030 is D1, and the width of the gap between the surrounding plate 1120 and the top surface of the first seat boss 1020 is D2, where D1≤D2. This maximizes the difficulty for external water to enter the water-blocking and ventilating channel 13 while ensuring the air venting requirement. In practice, D1 is 0.5mm to 1.5mm (e.g., 0.7mm, 1mm, 1.2mm), and D2 is 1mm to 2mm (e.g., 1.2mm, 1.5mm, 1.8mm).

[0102] In some embodiments, see Figure 1 , Figure 2 , Figure 7 and Figure 10In order to improve the sealing performance between the plug seat 10 and the mounting socket, avoid the phenomenon of air leakage and oil seepage in the mounting socket, a sealing ring 22 is arranged between the mounting socket and the plug seat 10, and the sealing is realized through the elastic deformation of the sealing ring 22. Optionally, the outer periphery of the plug seat 10 is provided with a clamping ring groove 23, the sealing ring 22 is arranged in the clamping ring groove 23, and after the sealing ring 22, the plug seat 10 and the oil blocking valve core 4 and the plug cover 11 form an integral whole, the assembly with the transmission is carried out, the modular mounting effect is formed, and the assembly convenience is improved.

[0103] The waterproof and breathable plug provided in the application has reliable waterproof performance for external water, good condensation effect for oil gas, can effectively improve the problem that a large amount of oil droplets overflow with gas in the exhaust process, can effectively block the oil droplets thrown out by the internal power components of the transmission during operation, and can improve the problem of too fast lubricating oil consumption.

[0104] Based on the same inventive concept, the application also provides a vehicle comprising the waterproof and breathable plug.

[0105] Compared with the prior art, the vehicle provided in the application can effectively improve the problem of a large amount of oil droplets overflowing from the breather plug of the transmission, realize the effect of condensing oil gas, avoid the formation of oil condensate on the inner wall of the engine compartment, avoid the problem of oil leakage caused by the throwing of oil droplets, reduce the consumption speed of lubricating oil in the transmission, thereby reducing the failure rate of the transmission and improving the use quality of the vehicle.

[0106] The above only describes the preferred embodiments of the application and should not be used to limit the application. Any modification, equivalent replacement and improvement made within the spirit and principle of the application should be included in the protection scope of the application.

Claims

1. A waterproof and breathable plug, characterized in that, include: The vent plug body (100) has a main vent slot (1) communicating with the inner cavity of the transmission and a main vent port (2) communicating with the external environment. A main mounting chamber (3) is also formed between the main vent slot (1) and the main vent port (2). An oil-blocking valve core (4) is fixed in the main body mounting chamber (3). The oil-blocking valve core (4) and the main body mounting chamber (3) cooperate to form an oil-blocking and venting channel (5). The oil-blocking and venting channel (5) is a normally open labyrinth channel. The two ports of the oil-blocking and venting channel (5) are respectively connected to the main body ventilation seam (1) and the main body ventilation port (2). With the distribution direction of the main ventilation seam (1) and the main installation chamber (3) as the first direction, the corresponding ports of the main ventilation seam (1) and the oil-blocking and ventilating channel (5) are misaligned in a direction perpendicular to the first direction.

2. The waterproof and breathable plug as described in claim 1, characterized in that, The oil baffle valve core (4) is provided with a mounting spring (6) on the side away from the main body ventilation seam (1), and the extension direction of the mounting spring (6) forms an angle with the first direction; the main body mounting chamber (3) is provided with a locking part (7), and the mounting spring (6) is engaged with the locking part (7) to limit the displacement of the oil baffle valve core (4) in the first direction.

3. The waterproof and breathable plug as described in claim 2, characterized in that, The main installation chamber (3) is provided with multiple support ribs (8) on one side near the main ventilation seam (1). The support ribs (8) are used to support the oil baffle valve core (4), and an oil guiding and ventilation channel (9) is formed between two adjacent support ribs (8).

4. The waterproof and breathable plug as described in any one of claims 1-3, characterized in that, The oil baffle valve core (4) includes an intermediate connecting body (410) and multiple oil baffle plates (420). The multiple oil baffle plates (420) are spaced apart on the intermediate connecting body (410) along a first direction. A vent is formed between the outer periphery of the oil baffle plate (420) and the side wall of the main body mounting chamber (3). In a direction perpendicular to the first direction, the vents on two adjacent oil baffle plates (420) are staggered so that the multiple oil baffle plates (420) cooperate with the main body mounting chamber (3) to form a labyrinthine oil baffle and venting channel (5).

5. The waterproof and breathable plug as described in claim 4, characterized in that, The oil baffle (420) adjacent to the main ventilation seam (1) is used as the first oil baffle (421). The outer peripheral edge of the first oil baffle (421) forms a core ventilation seam (18) between the side wall of the main installation chamber (3). The core ventilation seam (18) is connected to the main ventilation seam (1). In a direction perpendicular to the first direction, the main ventilation seam (1) and the core ventilation seam (18) are staggered.

6. The waterproof and breathable plug as described in claim 5, characterized in that, The oil baffle (420) located on the side of the first oil baffle (421) away from the main body ventilation seam (1) is the second oil baffle (422). The outer peripheral edge of the second oil baffle (422) abuts against the side wall of the main body mounting chamber (3). The edge of the second oil baffle (422) also forms an oil baffle notch (4221). In the circumferential direction of the main body mounting chamber (3), the oil baffle notches (4221) on two adjacent second oil baffles (422) are staggered. The oil baffle notch (4221) and the side wall of the main body mounting chamber (3) enclose the vent to form the air vent. The air vent formed by the second oil baffle (422) adjacent to the main body ventilation vent (2) is the air outlet of the oil baffle ventilation channel (5).

7. The waterproof and breathable plug as described in any one of claims 1-3, characterized in that, The main installation chamber (3) also has a guide slope (310) on the side near the main ventilation seam (1), and the guide slope (310) gradually slopes towards the main ventilation seam (1) from the outside to the inside.

8. The waterproof and breathable plug as described in claim 1, characterized in that, The breathable plug body (100) includes: The plug seat (10) forms the main body ventilation seam (1) and the main body mounting chamber (3) inside. The plug seat (10) also forms a seat vent (1010) communicating with the main body mounting chamber (3) on the side away from the main body ventilation seam (1). A plug (11) is used to cover the vent (1010) of the seat body; On the side of the main body vent (2) away from the main body mounting chamber (3), the plug seat (10) and the plug cover (11) cooperate to form a normally open water-blocking and venting channel (13). The water-blocking and venting channel (13) is a normally open labyrinth channel, and the outer port of the water-blocking and venting channel (13) is the main body vent (2).

9. The waterproof and breathable plug as described in claim 8, characterized in that, The main installation chamber (3) forms an installation gap (320) on the side away from the main ventilation seam (1), and the periphery of the installation gap (320) forms the seat ventilation port (1010); The plug (11) includes: A cover plate (1110) is installed over the installation opening (320) and integrally connected with the plug seat (10); A surrounding plate (1120) is arranged around the outer periphery of the cover plate (1110) and spaced apart from the plug seat (10). The water-blocking and air-permeable channel (13) is formed between the plug seat (10) and the surrounding plate (1120).

10. A vehicle, characterized in that, Includes the waterproof and breathable plug as described in any one of claims 1-9.

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