A new energy vehicle transmission breathing device

Abstract

This invention discloses a breathing device for a new energy vehicle transmission, comprising a transmission housing assembly, a vent valve assembly, and a one-way breathing assembly. The transmission housing assembly includes a first housing and a second housing, with the vent valve assembly and the one-way breathing assembly located at opposite ends of the second housing. The vent valve assembly includes a valve body assembly and a turbulence-permeable component disposed within the valve body assembly. The valve body assembly passes through the first housing and is movably connected to it. The one-way breathing assembly includes a one-way breathing valve that moves along the length of the first housing, a base disposed on the first housing, and an elastic element connecting the one-way breathing valve and the base. This invention, by incorporating a multi-stage oil-gas separation structure in the first housing and the turbulence-permeable component, prevents oil particles from clogging the polymer breathable membrane. Simultaneously, the one-way breathing valve prevents external liquids from entering the transmission, thus avoiding failure of internal high-voltage electrical components.

Description

Technical Field

[0001] This invention relates to the field of new energy transmissions, and more specifically to a breathing device for a new energy vehicle transmission. Background Technology

[0002] With the development of new energy vehicle technology, the development of new energy off-road vehicles has become a new trend. Off-road conditions are complex, involving jungle crossings and river crossings, making the requirements for vehicle water safety increasingly stringent. During operation, new energy transmissions involve multiple energy conversions: for example, the electric motor converts electrical energy into mechanical energy; and there are losses in the transmission of mechanical energy by gears and bearings within the transmission. These energy conversion and transmission processes are accompanied by efficiency losses and heat generation, causing changes in the internal temperature of the transmission. The transmission needs to "breathe" with the external environment to balance the internal pressure.

[0003] Currently, in the field of hybrid transmissions, the dual oil-cooled motor + transmission structure has become the mainstream solution. When both motors work simultaneously, they rotate at high speed and heat up rapidly. Inside the hybrid transmission, the high temperature causes an oil-gas mixture to form, which is then discharged through a vent valve.

[0004] However, during the exhaust process, oil molecules accumulate on the surface of the vent valve, clogging the polymer membrane. When the pressure difference reaches a certain level, it damages the polymer membrane, causing internal oil and gas to spray out, resulting in oil spraying. After oil spraying occurs, the polymer membrane suffers irreversible damage. When the vehicle encounters water wading conditions, the ventilation system needs to isolate external water molecules to prevent them from entering the transmission and causing motor failure. Due to damage to the polymer membrane, external water molecules can pass through the vent membrane and enter the transmission, causing internal high-voltage electrical components to fail. Summary of the Invention

[0005] Based on this, the purpose of this invention is to provide a breathing device for the transmission of new energy vehicles, aiming to solve the problem that during the current oil and gas discharge process, oil molecules accumulate on the surface of the breather valve, clogging the polymer membrane of the breather valve. When the pressure difference reaches a certain level, it damages the polymer membrane, causing internal oil and gas to spray out, resulting in oil spraying. This leads to irreversible damage to the polymer membrane, which in turn makes it unable to isolate external water molecules, causing high-voltage electrical components to fail.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a new energy vehicle transmission breathing device, the new energy vehicle transmission breathing device comprising a transmission housing assembly, a vent valve assembly disposed in the transmission housing assembly, and a one-way breathing assembly;

[0007] The transmission housing assembly includes a first housing and a second housing, with the vent valve assembly and the one-way breathing assembly located at both ends of the second housing;

[0008] A ventilator assembly includes a valve body assembly and a turbulence-ventilating component disposed in the valve body assembly. The valve body assembly passes through the first housing and is movably connected to the first housing.

[0009] A one-way breathing assembly includes a one-way breathing valve that moves along the length of the first housing, a base disposed on the first housing, and an elastic member connecting the one-way breathing valve and the base;

[0010] When the transmission is in the exhalation state, the mixed gas is introduced into the turbulence-permeable component from the first housing and discharged by the valve body component; when the transmission is in the inhalation state, the one-way breathing valve moves in the opposite direction away from the valve body component, so that gas enters the transmission from the one-way breathing valve and the first housing at the same time, quickly balancing the pressure difference between the inside and outside of the transmission.

[0011] In summary, according to the new energy vehicle transmission breathing device provided by the present invention, when the transmission is in the exhalation state, the mixed gas is introduced from the first housing to the bottom of the valve body assembly, and then the mixed gas is passed through the turbulence-permeable component, so that the mixed gas undergoes multiple oil-gas separations in this process. Oil particles are blocked in the front structure of the polymer permeable membrane, preventing oil particles from clogging the polymer permeable membrane and ensuring that the polymer permeable membrane functions properly throughout the vehicle's life cycle. At this time, the one-way vent valve cannot move, and external liquid cannot enter the transmission from the one-way vent valve and the first housing. When the transmission is in the inhalation state, the one-way vent valve moves in the opposite direction away from the valve body assembly, so that gas enters the transmission from the one-way vent valve and the first housing simultaneously, quickly balancing the pressure difference inside and outside the transmission. The present invention, by setting a multi-stage oil-gas separation structure in the first housing and the turbulence-permeable component, avoids oil particles clogging the polymer permeable membrane. At the same time, the setting of the one-way vent valve also prevents external liquid from entering the transmission, avoiding failure of internal high-voltage electrical components.

[0012] According to one aspect of the above technical solution, the first housing includes an inner cavity, a connecting channel disposed on the side of the first housing near the second housing, and an air passage connecting the inner cavity and the connecting channel, wherein the vent valve assembly and the one-way breathing assembly are respectively disposed at both ends of the inner cavity.

[0013] According to one aspect of the above technical solution, the inner cavity includes a first mating surface and a second mating surface for movably connecting with the valve body assembly, an oil draining structure at one end away from the valve body assembly, and a third mating surface for assembling with the one-way breather valve.

[0014] The first mating surface has a threaded inner circumference for movably connecting with the valve body assembly.

[0015] According to one aspect of the above technical solution, the connecting channel includes a sealing surface for connecting the first housing and the second housing, and a baffle rib and a guide rib disposed on the sealing surface, wherein the baffle rib and the guide rib are arranged in a direction perpendicular to the sealing surface.

[0016] According to one aspect of the above technical solution, the gas pipeline includes a first air inlet, a first guide hole, a second air inlet, a second guide hole, and a guide groove arranged sequentially in the direction away from the connecting channel. The guide groove is spirally engaged with the inner wall of the first housing to pass the mixed gas into the inner cavity.

[0017] According to one aspect of the above technical solution, the valve body assembly includes a vent valve housing movably connected to a first mating surface and a vent valve cover connected to the vent valve housing, wherein a vent groove is provided between the vent valve housing and the vent valve cover.

[0018] According to one aspect of the above technical solution, the turbulence-permeable component includes a polymer permeable membrane at the port of the permeable valve housing, a first turbulence plate and a second turbulence plate disposed in the permeable valve housing, and a filter screen disposed on the side of the permeable valve housing near the one-way breathing valve. The polymer permeable membrane is used to isolate external liquid water molecules.

[0019] According to one aspect of the above technical solution, a first sealing ring is also provided between the vent valve housing and the first housing.

[0020] According to one aspect of the above technical solution, the one-way breathing valve has a breathing hole at the end away from and near the valve body assembly.

[0021] According to one aspect of the above technical solution, the base is vertically engaged in a retaining ring located on the inner wall of the cavity.

[0022] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of a breathing device for a new energy vehicle transmission in one embodiment of the present invention;

[0024] Figure 2 This is a schematic diagram of the structure of the first housing in one embodiment of the present invention;

[0025] Figure 3 This is a schematic diagram of the structure combined with the channel in one embodiment of the present invention;

[0026] Figure 4 This is a top view of the gas pipeline in one embodiment of the present invention;

[0027] Figure 5 This is a cross-sectional view of a gas pipeline in one embodiment of the present invention;

[0028] Figure 6 This is a schematic diagram of the structure of a unidirectional breathing assembly in the exhalation state according to an embodiment of the present invention;

[0029] Figure 7 This is a schematic diagram of the unidirectional breathing assembly in the inhalation state according to an embodiment of the present invention;

[0030] Figure 8 This is a schematic diagram of the structure of the vent valve assembly in one embodiment of the present invention;

[0031] Figure 9 This is a schematic diagram of the exhalation path in one embodiment of the present invention;

[0032] Figure 10 This is a schematic diagram of the air intake path in one embodiment of the present invention.

[0033] Component symbol explanation in the attached diagram:

[0034] First housing 100, connecting channel 110, sealing surface 111, bolt fastening hole 112, glue storage tank 113, air inlet 114 on sealing surface, baffle 115, guide 116, air passage 120, first air inlet 121, first guide hole 122, second air inlet 123, second guide hole 124, third guide hole 125, first mating surface 130, guide groove 140, second mating surface 150. Oil pouring structure 160, third mating surface 170, second housing 200, vent valve assembly 300, vent valve cover 310, polymer breathable membrane 311, vent valve housing 312, first baffle 313, first sealing ring 314, second baffle 315, filter screen 316, one-way breathing assembly 400, one-way breathing valve 410, second sealing ring 411, elastic element 412, base 413, retaining ring 414. Detailed Implementation

[0035] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. Several embodiments of the invention are illustrated in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

[0036] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0038] Currently, to prevent water molecules from entering the vent valve, it is often lengthened and its position within the vehicle raised to ensure it remains above the water surface during wading. This leads to installation difficulties and affects air permeability. As vehicle wading depth requirements increase, this becomes even more challenging. To overcome these issues, please refer to [link to relevant documentation]. Figures 1-10 The diagram shows a structural schematic of a new energy vehicle transmission breathing device according to an embodiment of the present invention. The new energy vehicle transmission breathing device includes a transmission housing assembly, a vent valve assembly 300 disposed in the transmission housing assembly, and a one-way breathing assembly 400, wherein:

[0039] The transmission housing assembly includes a first housing 100 and a second housing 200. The vent valve assembly 300 and the one-way breathing assembly 400 are located at both ends of the second housing 200 for switching between exhalation and inhalation states of the transmission.

[0040] Furthermore, to achieve primary separation of the oil-gas mixture, the first housing 100 is provided with an inner cavity, a connecting channel 110 located on the side of the first housing 100 near the second housing 200, and a gas passage 120 connecting the inner cavity and the connecting channel 110. The vent valve assembly 300 and the one-way breathing assembly 400 are respectively located at both ends of the inner cavity. When the oil-gas mixture enters the connecting channel 110 between the first housing 100 and the second housing 200, the connecting channel 110 is equipped with a sealing surface 111, bolt fastening holes 112, a glue storage tank 113, a sealing surface air inlet 114, a baffle rib 115, and a guide rib 116.

[0041] The first housing 100 and the second housing 200 are connected by bolt fastening holes 112, and are sealed between the first housing 100 and the second housing 200 with silicone. Since the silicone is initially semi-liquid, a silicone storage tank 113 is designed to store excess silicone to prevent the silicone from clogging the air passage.

[0042] The oil-gas mixture enters the coupling channel 110 through the air inlet 114 on the sealing surface. Because multiple baffles 115 and guide ribs 116 are staggered within the coupling channel 110, the path length of the coupling channel 110 is increased. After the oil-gas mixture enters, due to gravity and changes in gas velocity and direction, the oil particles in the mixture are continuously liquefied, achieving initial oil-gas separation. The separated oil particles then flow back into the transmission under the influence of gravity.

[0043] In a further step, the oil-gas mixture that has undergone preliminary separation enters the gas pipeline 120. This gas pipeline 120 includes a first inlet 121, a first guide hole 122, a second inlet 123, a second guide hole 124, a third guide hole 125, and a guide groove 140, arranged sequentially in the direction away from the connecting channel 110. The first inlet 121 is located at the end of the connecting channel 110 to allow the oil-gas mixture that has undergone preliminary separation to enter the gas pipeline 120. The second inlet 123 connects the first guide hole 122 and the second guide hole 124 for transition. Due to the taper of the guide holes, the first guide hole 122, the second guide hole 124, and the third guide hole 125 are connected in a stepped manner, and the guide holes are tangentially connected to the guide groove 140, which can change the direction and flow rate of the oil-gas mixture. The oil-gas mixture is accelerated through the first guide hole 122, the second guide hole 124, and the third guide hole 125 before entering the guide groove 140.

[0044] It is worth noting that the guide channel 140 has a spiral structure. This guide channel 140 is fitted into the inner cavity, and its outlet is located near the bottom of the inner cavity. When the oil-gas mixture flows around the guide channel 140, the spiral arrangement of the guide channel 140 increases the gas path. During the flow of the oil-gas mixture, it continuously liquefies. Simultaneously, under the influence of centrifugal force, the oil particles further liquefy, achieving secondary separation. The liquefied oil particles are collected in the inner cavity and the oil-pouring structure 160 mentioned below under the influence of gravity.

[0045] The inner cavity includes a first mating surface 130 and a second mating surface 150 for movably connecting with the valve body assembly, an oil draining structure 160 at one end away from the valve body assembly, and a third mating surface 170 for assembling with the one-way breather valve. The first mating surface 130 has a thread on its inner circumference for movably connecting with the valve body assembly.

[0046] During the exhalation process of the transmission, the internal pressure of the transmission is greater than that of the breather valve assembly 300, and the one-way breathing assembly 400 is normally closed, ensuring that the system exhausts gas according to the oil-gas separation path. During the inhalation process, it is normally open, and outside air and liquefied oil quickly return to the transmission through this path, achieving rapid balance of internal and external air pressure. The one-way breathing assembly 400 includes a one-way breathing valve that moves along the length of the first housing 100, a base 413 disposed on the third mating surface 170 of the first housing 100, and an elastic element 412 connecting the one-way breathing valve and the base 413. The guide rod structure on the one-way breathing valve is clearance-fitted with the transmission housing, and the liquefied lubricating oil lubricates the guide rod. A breathing hole is provided at the end of the valve away from the valve body assembly. During the inhalation process, the breathing hole is in a conducting state, and air and liquefied oil particles return to the transmission through this path. A second sealing ring 411 is also fitted on the outer periphery of the one-way breathing valve to cooperate with the inner wall of the first housing 100 to achieve a seal. The elastic element 412 is installed between the one-way breathing valve 410 and the base 413. Both ends of the elastic element 412 are fixedly connected to the one-way breathing valve 410 and the base 413 respectively to prevent the elastic element 412 from moving during operation. The base 413 has a through structure, and its retaining ring 414 is located on the inner wall of the inner cavity of the first housing 100 to achieve the limiting function.

[0047] Furthermore, when the transmission is in the exhalation state, the internal pressure of the transmission is greater than the side pressure of the vent valve assembly 300, the one-way breather valve is pushed upward, the second sealing ring 411 on the one-way breather valve is in contact with the first housing 100, and the one-way breather assembly 400 is in the closed state; when the transmission is in the inhalation state, the internal pressure of the transmission is less than the side pressure of the vent valve assembly 300, the one-way breather valve is pushed downward, the one-way breather valve moves downward, the second sealing ring 411 separates from the first housing 100, and the gas returns to the inside of the transmission through three paths: the breather hole on the one-way breather valve, the radial gap between the one-way breather valve and the housing, and the through structure of the base 413.

[0048] According to one aspect of the above technical solution, the vent valve assembly 300 includes a valve body assembly and a turbulence-permeable component disposed within the valve body assembly. The valve body assembly passes through and is movably connected to the first housing 100. The valve body assembly includes a vent valve housing 312 movably connected to a first mating surface 130 and a vent valve cover 310 connected to the vent valve housing 312. A venting groove is provided between the vent valve housing 312 and the vent valve cover 310, which can also be used to block mud and sand without affecting the transmission's breathing. The turbulence-permeable component includes a polymer breathable membrane 311 at the port of the vent valve housing 312, a first turbulence plate 313 and a second turbulence plate 315 disposed within the vent valve housing 312, and a filter screen 316 disposed on the side of the vent valve housing 312 near the one-way breather valve. The polymer breathable membrane 311 is used to isolate external liquid water molecules. A first sealing ring 314 is also provided between the vent valve housing 312 and the first housing 100.

[0049] The vent valve housing 312 is threadedly connected to the first mating surface 130. The polymer breathable membrane 311 isolates external liquid water molecules, while moisture inside the transmission is discharged in gaseous form through the transmission's heat generation, improving the high-voltage insulation safety inside the transmission. A filter screen 316 is mounted on the vent valve housing 312, which further filters oil particles in the gas mixture through fine filtration. A first baffle plate 313 and a second baffle plate 315 are mounted on the vent valve housing 312 to achieve multi-layer turbulence. At the same time, the vent holes on the baffle plates are staggered to block oil particles in the gas mixture from entering the polymer breathable membrane 311, thus achieving three-stage separation.

[0050] During the transmission's exhalation process, the oil and gas undergo multi-stage separation, trapping oil particles in the pre-structure of the polymer breathable membrane 311: The first stage of separation is achieved by the connecting channel 110 between the first housing 100 and the second housing 200. As the mixed gas flows, oil particles are continuously liquefied. The liquefied oil particles, influenced by gravity, flow back into the transmission through the first housing 100. The second stage of separation is achieved by the first housing 100 and the breather valve assembly 300. The first housing 100 is equipped with multiple flow-guiding structures and a spiral flow-guiding groove 140, preventing oil from entering the transmission. During the flow of the gas-oil mixture, it passes through the spiral air passage in the guide channel 140, where oil particles are continuously liquefied. Simultaneously, under the influence of centrifugal force, heavier oil particles are separated. The liquefied oil flows to the one-way breather valve 410 under gravity and finally flows into the transmission. The third stage of separation is achieved by the breather valve assembly 300, which consists of multi-stage filtration. The gas-oil mixture passes through a multi-layered baffle and filter structure, resulting in oil-oil separation. The liquefied oil flows to the one-way breather valve 410 under gravity and finally flows into the transmission. In specific embodiments, this also depends on the structure and complexity of the transmission. For example, in a multi-in-one single-motor drive system, the transmission system has fewer heat sources, a smaller space, and generates less oil and gas; therefore, only the above-mentioned partial separation measures are needed to achieve the desired oil-gas separation effect.

[0051] During transmission intake, the one-way breathing assembly 400 opens, enabling dual-path intake and quickly balancing the pressure difference between the inside and outside of the transmission. The vent valve cover 310 blocks external mud, sand, and splashing liquid, allowing external gas and a small amount of liquid to flow into the vent valve through the cover 310. The polymer breathable membrane 311 isolates liquids, allowing gas to flow into the transmission. When the internal pressure of the transmission is lower than the external pressure, the one-way breathing assembly 400 opens, allowing gas to flow rapidly into the transmission through the one-way breathing valve and along the guide groove 140 and the first housing 100, quickly balancing the pressure difference between the inside and outside of the transmission.

[0052] In summary, according to the new energy vehicle transmission breathing device provided by the present invention, when the transmission is in the exhalation state, the mixed gas is introduced from the first housing to the bottom of the valve body assembly, and then the mixed gas is passed through the turbulence-permeable component, so that the mixed gas undergoes multiple oil-gas separations in this process. Oil particles are blocked in the front structure of the polymer permeable membrane, preventing oil particles from clogging the polymer permeable membrane and ensuring that the polymer permeable membrane functions properly throughout the vehicle's life cycle. At this time, the one-way vent valve cannot move, and external liquid cannot enter the transmission from the one-way vent valve and the first housing. When the transmission is in the inhalation state, the one-way vent valve moves in the opposite direction away from the valve body assembly, so that gas enters the transmission from the one-way vent valve and the first housing simultaneously, quickly balancing the pressure difference inside and outside the transmission. The present invention, by setting a multi-stage oil-gas separation structure in the first housing and the turbulence-permeable component, avoids oil particles clogging the polymer permeable membrane. At the same time, the setting of the one-way vent valve also prevents external liquid from entering the transmission, avoiding failure of internal high-voltage electrical components. It makes full use of the transmission's own structure, highly integrates a three-stage oil-gas separation structure and a dual-intake structure, does not occupy extra space in the vehicle, and has strong scalability.

[0053] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0054] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. A breathing device for a transmission of a new energy vehicle, characterized in that, The new energy vehicle transmission breathing device includes a transmission housing assembly, a vent valve assembly disposed in the transmission housing assembly, and a one-way breathing assembly; The transmission housing assembly includes a first housing and a second housing, with the vent valve assembly and the one-way breathing assembly located at both ends of the first housing; A ventilator assembly includes a valve body assembly and a turbulence-ventilating component disposed in the valve body assembly. The valve body assembly passes through the first housing and is movably connected to the first housing. A one-way breathing assembly includes a one-way breathing valve that moves along the length of the first housing, a base disposed on the first housing, and an elastic member connecting the one-way breathing valve and the base; In this process, when the transmission is in the exhalation state, the oil and gas mixture undergoes multi-stage separation, trapping oil particles in the pre-structure of the polymer breathable membrane: The first stage of separation is achieved through the connecting channel between the first and second housings. During the flow of the mixed gas, oil particles are continuously liquefied. The liquefied oil particles, influenced by gravity, flow back into the transmission through the first housing. The second stage of separation is achieved by the first housing and the breather valve assembly. The first housing features multiple flow-guiding structures combined with a spiral flow-guiding groove. During the flow of the oil and gas mixture, the oil particles are continuously liquefied as they pass through the spiral air passages in the flow-guiding grooves. Simultaneously, influenced by centrifugal force, heavier oil particles are separated, and the liquefied oil is then further separated by gravity. Under the action of force, the gas flows to the one-way breather valve and finally into the transmission. The third stage of separation is achieved by the breather valve assembly, which consists of multi-stage filtration. The oil-gas mixture is separated by a multi-layer baffle and filter structure. The liquefied oil flows to the one-way breather valve under the action of gravity and finally into the transmission. When the transmission is in the intake state, the one-way breather valve moves away from the valve body assembly to allow the gas to enter through the valve body assembly. It is then divided into two paths by the baffle breather assembly. Part of the gas enters the transmission through the one-way breather valve, and the remaining part enters the transmission through the second housing in sequence through the guide groove and the connecting channel, quickly balancing the pressure difference between the inside and outside of the transmission.

2. The new energy vehicle transmission breathing device according to claim 1, characterized in that, The first housing includes an inner cavity, a connecting channel disposed on the side of the first housing near the second housing, and an air passage connecting the inner cavity and the connecting channel. The ventilator assembly and the one-way breathing assembly are respectively disposed at both ends of the inner cavity.

3. The new energy vehicle transmission breathing device according to claim 2, characterized in that, The inner cavity includes a first mating surface and a second mating surface for movably connecting with the valve body assembly, an oil draining structure at one end away from the valve body assembly, and a third mating surface for assembling with the one-way breather valve. The first mating surface has a threaded inner circumference for movably connecting with the valve body assembly.

4. The new energy vehicle transmission breathing device according to claim 3, characterized in that, The connecting channel includes a sealing surface for connecting the first housing and the second housing, and a baffle rib and a guide rib provided on the sealing surface, wherein the baffle rib and the guide rib are arranged in a direction perpendicular to the sealing surface.

5. The new energy vehicle transmission breathing device according to claim 4, characterized in that, The gas pipeline includes a first air inlet, a first guide hole, a second air inlet, a second guide hole, and a guide groove arranged sequentially in the direction away from the connecting channel. The guide groove is spirally engaged with the inner wall of the first housing to pass the mixed gas into the inner cavity.

6. The new energy vehicle transmission breathing device according to claim 1, characterized in that, The valve body assembly includes a vent valve housing movably connected to a first mating surface and a vent valve cover connected to the vent valve housing, with a vent groove provided between the vent valve housing and the vent valve cover.

7. The new energy vehicle transmission breathing device according to claim 6, characterized in that, The turbulence-permeable component includes a polymer permeable membrane at the port of the permeable valve housing, a first turbulence plate and a second turbulence plate disposed inside the permeable valve housing, and a filter screen disposed on the side of the permeable valve housing near the one-way breathing valve. The polymer permeable membrane is used to isolate external liquid water molecules.

8. The new energy vehicle transmission breathing device according to claim 7, characterized in that, A first sealing ring is also provided between the vent valve housing and the first housing.

9. The new energy vehicle transmission breathing device according to claim 1, characterized in that, The one-way breather valve has a breather hole at the end away from the valve body assembly.

10. The new energy vehicle transmission breathing device according to claim 9, characterized in that, The base is vertically secured in a retaining ring located on the inner wall of the cavity.

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