New energy vehicle transmission breathing device

Abstract

The invention discloses a new energy vehicle transmission breathing device which comprises a transmission shell assembly, a ventilation valve assembly and a one-way breathing assembly, the transmission shell assembly comprises a first shell and a second shell, and the ventilation valve assembly and the one-way breathing assembly are arranged at the two ends of the second shell; the ventilation valve assembly comprises a valve body assembly and a turbulent flow ventilation assembly arranged in the valve body assembly, and the valve body assembly is arranged in the first shell in a penetrating mode and movably connected with the first shell; the one-way breathing assembly comprises a one-way breathing valve moving in the length direction of the first shell, a base arranged on the first shell and an elastic piece connected with the one-way breathing valve and the base. A multi-stage oil-gas separation structure is arranged in the first shell and the turbulent flow ventilation assembly, oil particles are prevented from blocking the macromolecule ventilation film, meanwhile, the arrangement of the one-way ventilation valve also prevents external liquid from entering the transmission, and failure of internal high-voltage electric devices is avoided.

Description

Technical Field

[0001] The present invention relates to the field of new energy transmissions, and in particular to a breathing device for a transmission of a new energy vehicle. Background Art

[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, accompanied by jungle crossings and river crossings, and the requirements for vehicle wading safety are becoming more and more stringent. During the operation of new energy transmissions, multiple energy conversions are involved: for example, the motor converts electrical energy into mechanical energy; the gears and bearings inside the transmission lose energy during the transmission of mechanical energy. These energy conversion and transmission processes are accompanied by efficiency losses, heat generation, and changes in the temperature inside the transmission. The transmission needs to breathe with the outside world to balance the internal pressure.

[0003] At present, in the field of hybrid transmission, the dual oil-cooled motor + transmission structure has become the mainstream solution. When the dual motors work at the same time, the motors rotate at high speed and the motor temperature rises rapidly. Due to the high temperature, the inside of the hybrid transmission forms a mixed state of oil and gas, and the gas is discharged through the breather valve.

[0004] However, during the discharge of oil and gas, oil molecules gather on the surface of the breathable valve and block the polymer membrane of the breathable valve. When the pressure difference reaches a certain level, the polymer membrane is damaged, the internal oil and gas are ejected, and oil injection occurs. After the oil injection occurs, the polymer membrane is irreversibly damaged. When the vehicle encounters wading conditions, the breathing system needs to isolate external water molecules to prevent them from entering the transmission and causing motor failure. Due to the damage to the polymer membrane, external water molecules can enter the transmission through the breathable membrane, causing internal high-voltage electrical devices to fail. Summary of the invention

[0005] Based on this, the purpose of the present invention is to provide a new energy vehicle transmission breathing device, which aims to solve the problem that during the current oil and gas discharge process, oil molecules gather on the surface of the breathable valve and block the polymer membrane of the breathable valve. When the pressure difference reaches a certain level, the polymer membrane is damaged, the internal oil and gas are sprayed out, and the oil spray phenomenon occurs, resulting in irreversible damage to the polymer membrane, which makes it impossible to isolate external water molecules, resulting in failure of high-voltage electrical devices.

[0006] To achieve the above object, the present invention is implemented through the following technical solutions: a new energy vehicle transmission breathing device, the new energy vehicle transmission breathing device includes a transmission housing assembly, a breathable valve assembly and a one-way breathing assembly arranged in the transmission housing assembly;

[0007] The transmission housing assembly comprises a first housing and a second housing, wherein the breathable valve assembly and the one-way breathing assembly are arranged at two ends of the second housing;

[0008] A breathable valve assembly, comprising a valve body component and a flow-turbulating breathable component arranged in the valve body component, wherein the valve body component is inserted into the first shell and movably connected to the first shell;

[0009] A one-way breathing assembly, comprising a one-way breathing valve moving along the length direction of the first shell, a base arranged on the first shell, and an elastic member connecting the one-way breathing valve and the base;

[0010] Among them, when the transmission is in an exhalation state, the mixed gas passes into the spoiler and breathable assembly from the first shell and is discharged by the valve body assembly; when the transmission is in an inhalation state, the one-way breathing valve moves in the opposite direction away from the valve body assembly, so that the gas enters the transmission from the one-way breathing valve and the first shell at the same time, quickly balancing the pressure difference between the inside and outside of the transmission.

[0011] In summary, according to a new energy vehicle transmission breathing device provided by the present invention, when the transmission is in an exhalation state, the mixed gas is passed from the first housing to the bottom of the valve body assembly, and then the mixed gas is passed through the spoiler ventilation assembly, so that the mixed gas undergoes multiple oil-gas separations in this process, and the oil particles are blocked in the front structure of the polymer breathable membrane, so as to prevent the oil particles from clogging the polymer breathable membrane, and ensure that the polymer breathable membrane is completed within the life cycle of the vehicle. At this time, the one-way breathable valve cannot move, and the external liquid cannot enter the transmission from the one-way breathable valve and the first housing; when the transmission is in an inhalation state, the one-way breathing valve moves in the opposite direction away from the valve body assembly, so that the gas enters the transmission from the one-way breathing valve and the first housing at the same time, and quickly balances the pressure difference between the inside and outside of the transmission. The present invention sets a multi-stage oil-gas separation structure in the first housing and the spoiler ventilation assembly to prevent oil particles from clogging the polymer breathable membrane. At the same time, the setting of the one-way breathable valve also prevents external liquid from entering the transmission, and avoids causing failure of internal high-voltage electrical devices.

[0012] According to one aspect of the above technical solution, the first shell includes an inner cavity, a connecting channel arranged on the side of the first shell close to the second shell, and an air path pipeline connecting the inner cavity and the connecting channel, and the breathable valve assembly and the one-way breathing assembly are respectively arranged 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 active connection with the valve body assembly, an oil pouring structure away from one end of the valve body assembly, and a third mating surface for assembly with the one-way breathing valve;

[0014] Wherein, the inner circumference of the first matching surface is provided with threads to be movably connected with the valve body assembly.

[0015] According to one aspect of the above technical solution, the combining channel includes a sealing surface for combining the first shell and the second shell, and spoiler ribs and guide ribs arranged on the sealing surface, and the spoiler ribs and the guide ribs 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 hole, a first guide hole, a second air inlet hole, a second guide hole, and a guide groove which are arranged in sequence in a direction away from the combined channel. The guide groove is spirally clamped on the inner wall of the first shell 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 breathable valve shell movably connected to the first mating surface and a breathable valve cover connected to the breathable valve shell, and a ventilation groove is provided between the breathable valve shell and the breathable valve cover.

[0018] According to one aspect of the above technical solution, the spoiler and breathable component includes a polymer breathable membrane at the port of the breathable valve housing, a first spoiler and a second spoiler arranged in the breathable valve housing, and a filter arranged on the side of the breathable valve housing close to the one-way breathing valve, and the polymer breathable membrane is used to isolate external liquid water molecules.

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

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

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

[0022] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0024] Figure 2 It is a schematic structural diagram of a first shell in one embodiment of the present invention;

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

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

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

[0028] Figure 6 It is a structural schematic diagram of a one-way breathing assembly in an exhalation state in one embodiment of the present invention;

[0029] Figure 7 It is a structural schematic diagram of a one-way breathing assembly in an inhalation state in one embodiment of the present invention;

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

[0031] Fig. 9 A schematic diagram of an exhalation path in an embodiment of the present invention;

[0032] Fig.10 FIG. 1 is a schematic diagram of an air intake path in an embodiment of the present invention.

[0033] Component symbol description:

[0034] The first housing 100, the combined channel 110, the sealing surface 111, the bolt fastening hole 112, the glue storage tank 113, the sealing surface air inlet hole 114, the spoiler rib 115, the guide rib 116, the air pipeline 120, the first air inlet hole 121, the first guide hole 122, the second air inlet hole 123, the second guide hole 124, the third guide hole 125, the first mating surface 130, the guide groove 140, the second mating surface 150, Oil pouring structure 160, third mating surface 170, second shell 200, breathable valve assembly 300, breathable valve cover 310, polymer breathable membrane 311, breathable valve shell 312, first spoiler 313, first sealing ring 314, second spoiler 315, filter 316, one-way breathing assembly 400, one-way breathing valve 410, second sealing ring 411, elastic member 412, base 413, retaining ring 414. DETAILED DESCRIPTION

[0035] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. Several embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0036] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0038] At present, in order to prevent water molecules from entering the breathable valve, the breathable valve is often lengthened and raised in the vehicle to ensure that it is above the water surface when wading. This makes the layout difficult and affects the ventilation volume. As the requirements for the wading depth of the vehicle are further improved, it becomes more difficult to achieve. To overcome the above problems, please refer to Figure 1-Figure 10 , which is a schematic structural diagram of a transmission breathing device for a new energy vehicle provided in one embodiment of the present invention, the transmission breathing device for a new energy vehicle comprises a transmission housing assembly, a breathable valve assembly 300 and a one-way breathing assembly 400 arranged in the transmission housing assembly, wherein:

[0039] The transmission housing assembly includes a first housing 100 and a second housing 200 . The breathable valve assembly 300 and the one-way breathing assembly 400 are arranged at both ends of the second housing 200 to switch the transmission between the exhalation state and the inhalation state.

[0040] Furthermore, in order to achieve a primary separation of the oil-gas mixture, an inner cavity, a connecting channel 110 provided on the first shell 100 near the second shell 200, and an air path pipe 120 connecting the inner cavity and the connecting channel 110 are provided in the first shell 100, and the breathable valve assembly 300 and the one-way breathing assembly 400 are respectively provided at both ends of the inner cavity. When the oil-gas mixture enters the connecting channel 110 between the first shell 100 and the second shell 200, the sealing surface 111, the bolt fastening hole 112, the glue storage tank 113, the sealing surface air inlet hole 114, the spoiler rib 115 and the guide rib 116 are provided in the connecting channel 110.

[0041] The first shell 100 and the second shell 200 are connected through the bolt fastening hole 112, and are sealed between the first shell 100 and the second shell 200 by silicone. Since the silicone is initially semi-liquid, a glue storage tank 113 is designed to store excess sealant to prevent the silicone from clogging the air path.

[0042] The oil-gas mixture enters the combined channel 110 from the air inlet hole 114 of the sealing surface. Since a plurality of spoiler ribs 115 and guide ribs 116 are arranged in a staggered manner in the combined channel 110, the path length of the combined channel 110 is increased. When the oil-gas mixture enters, the oil particles in the oil-gas mixture are continuously liquefied under the influence of gravity and the change of gas flow velocity and direction, thereby achieving preliminary oil-gas separation. The separated oil particles flow back into the transmission under the influence of gravity.

[0043] In a further update, the oil-gas mixture that has undergone preliminary separation enters the gas pipeline 120, and the gas pipeline 120 includes a first air inlet 121, a first guide hole 122, a second air inlet 123, a second guide hole 124, a third guide hole 125, and a guide groove 140 that are sequentially arranged in a direction away from the combined channel 110. The first air inlet 121 is arranged at the tail of the combined channel 110 so that the oil-gas mixture that has undergone preliminary oil-gas separation enters the gas pipeline 120. The second air inlet 123 connects the first guide hole 122 and the second guide hole 124 for transition. Since the guide holes have a certain taper, 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 and then enters the guide groove 140 .

[0044] It is worth noting that the guide groove 140 is a spiral structure, and the guide groove 140 is stuck in the inner cavity, and the outlet of the guide groove 140 is placed near the bottom of the inner cavity. When the oil-gas mixture runs along the guide groove 140, the spiral guide groove 140 increases the gas path, and the oil-gas mixture is continuously liquefied during the flow process. At the same time, under the influence of centrifugal force, the oil particles are further liquefied to achieve secondary separation. The liquefied oil particles are collected in the inner cavity and in 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 pouring structure 160 away from one end of the valve body assembly, and a third mating surface 170 for assembling with the one-way breathing valve, wherein the inner circumference of the first mating surface 130 is provided with threads 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 the breathable valve assembly 300, and the one-way breathing assembly 400 is in a normally closed state, ensuring that the system is exhausted according to the oil-gas separation path. The inhalation process is in a normally open state, and the outside air and the liquefied oil quickly return to the transmission through this path to achieve a rapid balance of the internal and external air pressures. The one-way breathing assembly 400 includes a one-way breathing valve that moves along the length direction of the first housing 100, a base 413 provided on the third mating surface 170 of the first housing 100, and an elastic member 412 connecting the one-way breathing valve and the base 413. The guide rod structure on the one-way breathing valve is matched with the clearance of the transmission housing, and the liquefied lubricating oil lubricates the operation of the guide rod. A breathing hole is provided at one end of the valve away from the valve body assembly. The breathing hole is in a conducting state in the inhalation state, and the air and liquefied oil particles return to the inside of the transmission through this path. The outer periphery of the one-way breathing valve is also equipped with a second sealing ring 411 to cooperate with the inner wall of the first housing 100 to achieve sealing. The elastic member 412 is installed between the one-way breathing valve 410 and the base 413, and the two ends of the elastic member 412 are fixedly connected to the one-way breathing valve 410 and the base 413 respectively to prevent the elastic member 412 from moving during operation. The base 413 is a through structure, and its clamping ring 414 is limited to the inner wall of the inner cavity of the first shell 100 to achieve a limiting function.

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

[0048] According to one aspect of the above technical solution, the breathable valve assembly 300 includes a valve body component and a spoiler and breathable component arranged in the valve body component. The valve body component is inserted into the first housing 100 and movably connected to the first housing 100. The valve body component includes a breathable valve housing 312 movably connected to the first mating surface 130 and a breathable valve cover 310 connected to the breathable valve housing 312. A ventilation groove is provided between the breathable valve housing 312 and the breathable valve cover 310, which can also be used to block mud and sand without affecting the breathing of the transmission. The spoiler and breathable component includes a polymer breathable membrane 311 at the port of the breathable valve housing 312, a first spoiler 313 and a second spoiler 315 arranged in the breathable valve housing 312, and a filter 316 arranged on the side of the breathable valve housing 312 close to the one-way breathing valve. The polymer breathable membrane 311 is used to isolate external liquid water molecules. A first sealing ring 314 is also provided between the breathable valve housing 312 and the first housing 100.

[0049] The breathable valve housing 312 is connected to the first mating surface 130 by threads, and the polymer breathable membrane 311 isolates the external liquid water molecules. At the same time, the moisture inside the transmission is discharged to the outside of the transmission in a gaseous form through the heat generated by the transmission, thereby improving the high-voltage insulation safety inside the transmission. The breathable valve housing 312 is equipped with a filter 316, and the oil particles in the mixed gas are further filtered through the fine filtration of the filter 316. The breathable valve housing 312 is equipped with a first spoiler 313 and a second spoiler 315 to achieve multi-layer spoiler flow. At the same time, the vents on the spoilers are arranged in an interlaced manner to block the oil particles in the mixed gas outside the polymer breathable membrane 311 to achieve three-level separation.

[0050] The oil and gas in the transmission exhalation process are separated in multiple stages, and the oil particles are blocked in the front structure of the polymer breathable membrane 311: the first stage separation is completed by the combined channel 110 between the first shell 100 and the second shell 200. During the flow of the mixed gas, the oil particles are continuously liquefied. The liquefied oil particles are affected by gravity and flow back into the transmission through the first shell 100; the second stage separation is achieved by the first shell 100 and the breathable valve assembly 300. The first shell 100 is provided with a multiple guide structure and a spiral guide groove 140. The oil During the flow, the gas mixture passes through the spiral airway in the guide groove 140, and the oil particles are continuously liquefied. At the same time, under the influence of centrifugal force, the heavier oil particles are separated. The liquefied oil flows to the one-way breathing valve 410 under the action of gravity, and finally flows into the transmission. The third stage of separation is achieved by the breathable valve assembly 300. The breathable valve is composed of multi-stage filtration. The oil and gas mixture passes through the structure of multi-layer spoiler + filter, and the oil and gas are separated. The liquefied oil flows to the one-way breathing valve 410 under the action of gravity, and finally flows into the transmission. In a specific embodiment, it is also related to the structure and complexity of the transmission. For example, in an all-in-one single-motor drive system, the transmission system has fewer heat sources, a small transmission space, and less oil and gas production. Only the above-mentioned partial separation measures are required to achieve the oil and gas separation effect.

[0051] During the transmission air intake process, the one-way breathing assembly 400 opens to achieve two-way air intake and quickly balance the pressure difference between the inside and outside of the transmission. The breathable valve cover 310 blocks external mud and splashing liquid, and external gas and a small amount of liquid flow into the breathable valve through the breathable valve cover 310. The polymer breathable membrane 311 isolates the liquid and allows the gas to flow into the transmission. The internal pressure of the transmission is lower than the external pressure of the transmission. The one-way breathing assembly 400 opens, and the gas quickly flows into the transmission through the one-way breathing valve, and flows into the transmission along the guide groove 140 and the first shell 100, quickly balancing the pressure difference between the inside and outside of the transmission.

[0052] In summary, according to a new energy vehicle transmission breathing device provided by the present invention, when the transmission is in an exhalation state, the mixed gas is passed from the first housing to the bottom of the valve body assembly, and then the mixed gas is passed through the spoiler ventilation assembly, so that the mixed gas undergoes multiple oil-gas separations in this process, and the oil particles are blocked in the front structure of the polymer breathable membrane, so as to prevent the oil particles from clogging the polymer breathable membrane, and ensure that the polymer breathable membrane is completed within the life cycle of the vehicle. At this time, the one-way breathable valve cannot move, and the external liquid cannot enter the transmission from the one-way breathable valve and the first housing; when the transmission is in an inhalation state, the one-way breathing valve moves in the opposite direction away from the valve body assembly, so that the gas enters the transmission from the one-way breathing valve and the first housing at the same time, and quickly balances the pressure difference between the inside and outside of the transmission. The present invention sets a multi-stage oil-gas separation structure in the first housing and the spoiler ventilation assembly to prevent oil particles from clogging the polymer breathable membrane. At the same time, the setting of the one-way breathable valve also prevents external liquid from entering the transmission, and avoids causing failure of internal high-voltage electrical devices. It makes full use of the transmission's own structure, highly integrates the three-stage oil-gas separation structure and the two-way air intake structure, does not occupy additional space in the vehicle, and has strong scalability.

[0053] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0054] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A new energy vehicle transmission breathing device, characterized in that: The transmission breathing device of the new energy vehicle comprises a transmission housing assembly, a breathable valve assembly and a one-way breathing assembly arranged in the transmission housing assembly; The transmission housing assembly comprises a first housing and a second housing, wherein the breathable valve assembly and the one-way breathing assembly are arranged at two ends of the second housing; A breathable valve assembly, comprising a valve body component and a flow-turbulating breathable component arranged in the valve body component, wherein the valve body component is inserted into the first shell and movably connected to the first shell; A one-way breathing assembly, comprising a one-way breathing valve moving along the length direction of the first shell, a base arranged on the first shell, and an elastic member connecting the one-way breathing valve and the base; Among them, when the transmission is in an exhalation state, the mixed gas passes into the spoiler and breathable assembly from the first shell and is discharged by the valve body assembly; when the transmission is in an inhalation state, the one-way breathing valve moves in the opposite direction away from the valve body assembly, so that the gas enters the transmission from the one-way breathing valve and the first shell at the same time, 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 is characterized in that: The first shell includes an inner cavity, a connecting channel arranged on a side of the first shell close to the second shell, and an air path pipeline connecting the inner cavity and the connecting channel. The air valve assembly and the one-way breathing assembly are respectively arranged at two ends of the inner cavity.

3. The new energy vehicle transmission breathing device according to claim 2 is characterized in that: The inner cavity includes a first mating surface and a second mating surface for active connection with the valve body assembly, an oil pouring structure away from one end of the valve body assembly, and a third mating surface for assembly with the one-way breathing valve; Wherein, the inner circumference of the first matching surface is provided with threads to be movably connected with the valve body assembly.

4. The new energy vehicle transmission breathing device according to claim 3 is characterized in that: The combining channel includes a sealing surface for combining the first shell and the second shell, and spoiler ribs and guide ribs arranged on the sealing surface, and the spoiler ribs and the guide ribs are arranged in a direction perpendicular to the sealing surface.

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

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

7. The new energy vehicle transmission breathing device according to claim 6 is characterized in that: The spoiler and breathable component includes a polymer breathable membrane at the port of the breathable valve housing, a first spoiler and a second spoiler arranged in the breathable valve housing, and a filter arranged on the side of the breathable valve housing close to the one-way breathing valve. The polymer breathable membrane is used to isolate external liquid water molecules.

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

9. The new energy vehicle transmission breathing device according to claim 1 is characterized in that: A breathing hole is arranged at one end of the one-way breathing valve away from the valve body assembly.

10. The new energy vehicle transmission breathing device according to claim 9 is characterized in that: The base is vertically clamped in a clamping ring arranged on the inner wall of the inner cavity.

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