Ventilation valve, rear main speed reducer assembly and automobile

Abstract

The invention relates to the technical field of rear main reducer assembly pressure relief, in particular to a vent valve, a rear main reducer assembly and an automobile. The vent valve comprises a valve body and a flow blocking assembly, the valve body is provided with a pressure relief channel, and the pressure relief channel penetrates through the valve body in the extending direction of the pressure relief channel; the flow blocking assembly is located in the pressure relief channel, the flow blocking assembly is configured to deflect when bearing pressure from an inlet to an outlet of the pressure relief channel so as to change the orthographic projection area of the flow blocking assembly on a projection plane, and the projection plane is a plane perpendicular to the extension direction of the pressure relief channel. According to the rear main speed reducer assembly, pressure generated during work in the rear main speed reducer assembly can be reduced.

Description

Technical Field

[0001] The present application relates to the technical field of pressure relief of a rear main reducer assembly, and in particular to a vent valve, a rear main reducer assembly and a vehicle. Background Art

[0002] A car is a means of transport that uses multiple wheels to carry goods.

[0003] The automobile includes an engine, wheels and a rear main reducer assembly. The rear main reducer assembly decelerates and increases the torque of the engine and transmits it to the wheels to achieve the transportation function.

[0004] In the related art, the rear main reducer assembly requires oil for lubrication and cooling during operation. The gas generated by the oil for lubrication and cooling will cause internal expansion, which will cause excessive internal pressure of the rear main reducer assembly. Summary of the invention

[0005] In view of this, the present application provides a vent valve, a rear main reducer assembly and a vehicle to reduce the pressure generated when the rear main reducer assembly is working internally.

[0006] Specifically, the following technical solutions are included:

[0007] A first aspect of the present application provides a vent valve, the vent valve comprising a valve body and a flow blocking assembly, wherein:

[0008] The valve body has a pressure relief channel, and the pressure relief channel runs through the valve body along its extension direction;

[0009] The baffle assembly is located in the pressure relief channel, and is configured to deflect when subjected to pressure from the inlet toward the outlet of the pressure relief channel to change the area of ​​its positive projection on the projection plane, which is a plane perpendicular to the extension direction of the pressure relief channel.

[0010] Optionally, the baffle assembly includes a first baffle, one end of which is connected to the wall of the pressure relief channel, and the first baffle can rotate around the end connected to the wall of the pressure relief channel.

[0011] Optionally, the rotation angle range of the first baffle is 45 to 135°.

[0012] Optionally, the flow blocking assembly includes a limiting portion, and the limiting portion is located on a side of the first baffle plate facing the inlet of the pressure relief channel.

[0013] Optionally, the vent valve further includes a second baffle, one end of which is fixedly connected to a wall surface of the pressure relief channel.

[0014] Optionally, the number of the second baffles is at least two, and two of the at least two second baffles are arranged at intervals along the extension direction of the pressure relief channel.

[0015] Optionally, the second baffle extends obliquely from one end connected to the wall surface of the pressure relief channel to the other end along the extension direction of the pressure relief channel toward the inlet of the pressure relief channel.

[0016] Optionally, the two second baffles are respectively located on two opposite sides of the pressure relief channel and are closer to the outlet of the pressure relief channel than the baffle assembly.

[0017] A second aspect of the present application provides a rear main reducer assembly, wherein the rear main reducer assembly includes the ventilation valve as described in the above technical solution.

[0018] A third aspect of the present application provides a vehicle, comprising a rear main reducer assembly according to the above technical solution.

[0019] The beneficial effects of the technical solution provided by the embodiment of the present application include at least: the pressure relief channel can allow the oil generated by the main rear main reducer assembly to pass through, thereby achieving a pressure relief effect on the main rear main reducer assembly. The flow blocking component located in the pressure relief channel can reduce the leakage of oil from the pressure relief channel. In addition, the flow blocking component can be deflected when it is subjected to pressure from the inlet toward the outlet of the pressure relief channel, which is conducive to the flow blocking component adjusting its blocking effect according to the working condition of the main rear main reducer assembly, which is conducive to the operation of the main rear main reducer assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 A schematic cross-sectional view of a vent valve provided in an embodiment of the present application;

[0022] Figure 2 A full cross-sectional schematic diagram of a mounting base provided in an embodiment of the present application.

[0023] The reference numerals in the figures represent respectively:

[0024] 1. valve body; 100. pressure relief channel; 11. first section; 12. second section;

[0025] 2. flow blocking assembly; 21. first baffle; 22. limiting part;

[0026] 3. Second baffle;

[0027] 4. Mounting seat; 41. Position limiting boss; 42. Enclosure; 400. Drain hole; 401. Pressure relief hole;

[0028] 5. Sealing ring.

[0029] The above drawings have shown clear embodiments of the present application, which will be described in more detail later. These drawings and text descriptions are not intended to limit the scope of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0031] The directional nouns involved in the embodiments of the present application, such as "upper", "lower", "side", etc., are generally represented by Figure 1 The relative relationship of the orientation shown in the figure is used as the basis, and these orientation terms are used only to more clearly describe the relationship between structures, not to describe absolute orientation. When the product is placed in different postures, the orientation may change, for example, "up" and "down" may be interchangeable.

[0032] Unless otherwise defined, all technical terms used in the embodiments of the present application have the same meanings as commonly understood by those of ordinary skill in the art.

[0033] In order to make the technical solutions and advantages of the present application more clear, the implementation methods of the present application will be further described in detail below with reference to the accompanying drawings.

[0034] In the related art, the gear meshing and oil agitation of the rear main reducer assembly during operation can rapidly increase the temperature inside the cavity, causing the pressure inside the cavity to be higher than that outside, forming a pressure difference. If the pressure difference is too large, it will easily cause the seal of the rear main reducer assembly to fail, resulting in oil leakage. To solve this problem, a vent valve is usually installed on the rear main reducer assembly housing to ensure the pressure balance between the cavity and the outside world, and also to prevent foreign matter (dust, gravel, water, etc.) from entering the cavity through the vent valve.

[0035] The agitation of the oil will generate a large amount of oil mist, oil droplets, high-temperature and high-pressure oil mist, and high-speed splashing oil droplets, which will flow out of the cavity through the vent valve, causing customers to complain about the oil leakage of the vent valve. At the same time, the reduction of oil in the cavity reduces the lubrication performance of the rear main reducer assembly, causing it to fail prematurely. Therefore, the vent structure needs to have the function of oil and gas condensation and blocking splashing oil droplets.

[0036] A labyrinth structure is designed inside the cavity of the rear main reducer assembly at the vent valve mounting hole to prevent oil droplets from splashing onto the vent valve. However, the market's pursuit of high-torque products has led to the structural dimensions of the products becoming larger and larger. The limitations of the vehicle layout space require sacrificing the labyrinth structure in the cavity to ensure sufficient space for the layout of other components, resulting in the risk of oil leakage in the rear main reducer assembly.

[0037] A first aspect of the present application provides a vent valve, such as Figure 1 As shown, the vent valve includes a valve body 1 and a flow blocking component 2, wherein:

[0038] The valve body 1 has a pressure relief passage 100, and the pressure relief passage 100 penetrates the valve body 1 along its extension direction;

[0039] The baffle assembly 2 is located in the pressure relief channel 100 , and is configured to be able to deflect when subjected to pressure from the inlet toward the outlet of the pressure relief channel 100 to change the area of ​​its positive projection on the projection plane, which is a plane perpendicular to the extension direction of the pressure relief channel 100 .

[0040] It is understandable that the pressure relief channel 100 can allow the oil generated by the main rear final reducer assembly to pass through, thereby achieving a pressure relief effect on the main rear final reducer assembly. The flow blocking component 2 located in the pressure relief channel 100 can reduce the leakage of oil from the pressure relief channel 100. In addition, the flow blocking component 2 can be deflected when it is subjected to the pressure from the inlet to the outlet of the pressure relief channel 100, which is conducive to the flow blocking component 2 adjusting its blocking effect according to the working condition of the main rear final reducer assembly, which is conducive to the operation of the main rear final reducer assembly.

[0041] In the embodiment of the present application, the valve body 1 is made by injection molding to reduce production costs. The outer side of the valve body 1 can be used to abut against the opening of the rear main reducer assembly, so as to achieve the installation of the vent valve. Among them, a sealing ring 5 can be arranged on the outer side of the valve body 1, and the sealing ring 5 is used to abut against the opening of the rear main reducer assembly, so that the installation of the valve body 1 can be achieved, and the gap between the valve body 1 and the rear main reducer assembly can be reduced to improve the sealing of the rear main reducer assembly.

[0042] In the embodiment of the present application, the number of the sealing rings 5 ​​can be 1, 2, 3, or other numbers.

[0043] In the embodiment of the present application, the flow blocking effect of the flow blocking component 2 is generally achieved by interfering with the liquid oil entering the pressure relief channel 100. The larger the area of ​​the flow blocking component 2 in the projection plane, the better the interference effect on the liquid oil is generally, and the more obvious the flow blocking effect is. But correspondingly, this interference effect will also interfere with the gaseous oil, preventing it from leaving through the pressure relief channel 100. The area of ​​the orthographic projection of the flow blocking component 2 in the projection plane can be changed, which is conducive to timely reducing the interference effect of the flow blocking component 2 when the working intensity of the rear main reducer assembly is high, and can also improve its interference effect when it is at a lower working intensity. In this way, the interference of the flow blocking component 2 on the gaseous oil can be reduced, and the interference effect on the liquid oil can also be played.

[0044] In the embodiment of the present application, the orthographic projection area of ​​the flow-blocking component 2 on the projection plane is S1 when there is no pressure from the inlet to the outlet of the pressure relief channel 100, and is S2 when there is pressure from the inlet to the outlet of the pressure relief channel 100, wherein S1 is smaller than S2. This is conducive to improving the flow-blocking effect of the flow-blocking component 2 when the rear main reducer assembly is working, so as to reduce the occurrence of leakage.

[0045] In the embodiment of the present application, the orthographic projection area of ​​the baffle component 2 on the projection plane takes a value range of S3 to S4 when the pressure from the inlet toward the outlet of the pressure relief channel 100 is less than the set value, wherein S3 is less than S4 and less than the maximum orthographic projection area of ​​the baffle component 2; takes a value range of S5 to S6 when the pressure from the inlet toward the outlet of the pressure relief channel 100 is less than the set value, wherein S5 is less than S6 and less than the maximum orthographic projection area of ​​the baffle component 2; wherein S3 can be equal to S5, and S4 can be equal to S6.

[0046] In the embodiments of the present application, Figure 2 As shown, the vent valve may include a mounting seat 4 , which is arranged at the outlet end of the pressure relief channel 100 and communicates with the pressure relief channel 100 through a pressure relief hole 401 .

[0047] In the embodiment of the present application, the mounting seat 4 can be connected to the valve body 1 by means of snap connection, bonding, threaded connection, etc.

[0048] In the embodiment of the present application, the cross-sectional area of ​​the pressure relief hole 401 may be smaller than the cross-sectional area of ​​the pressure relief channel 100 .

[0049] In an embodiment of the present application, the pressure relief hole 401 extends from one end of the pressure relief channel 100 to the first surface of the mounting seat 4, wherein the height of the pressure relief hole 401 is higher than the height of other positions of the first surface, which is helpful in reducing the situation where external impurities enter the pressure relief channel 100 through the pressure relief hole 401.

[0050] In the embodiment of the present application, a baffle 42 is arranged circumferentially on the first surface of the mounting seat 4, and the baffle 42 can be used to prevent liquid in the external environment from flowing into the pressure relief hole 401, which helps to reduce the situation where liquid enters the rear main reducer assembly through the pressure relief channel 100.

[0051] In an embodiment of the present application, a drainage hole 400 may be arranged in the enclosure 42, and the drainage hole 400 penetrates the enclosure 42 in a direction perpendicular to the extension direction of the pressure relief hole 401. This is beneficial for the liquid entering the enclosure 42 to be drawn out of the mounting seat 4 through the drainage hole 400, so as to reduce the situation where the accumulated liquid overflows into the pressure relief hole 401.

[0052] In the embodiment of the present application, a limiting boss 41 may be arranged on the side of the mounting seat 4, and the limiting boss 41 may be used to cooperate with a groove on the rear main reducer assembly to achieve fixation and positioning of the ventilation valve.

[0053] In some of the embodiments of this application, Figure 1 As shown, the baffle assembly 2 includes a first baffle 21 , one end of which is connected to the wall of the pressure relief channel 100 , and the first baffle 21 can rotate around the end connected to the wall of the pressure relief channel 100 .

[0054] It can be understood that the first baffle 21 can interfere with the liquid oil entering the pressure relief channel 100 through its surface to reduce the leakage of the liquid oil from the pressure relief channel 100. The first baffle 21 can rotate around the end connected to the wall of the pressure relief channel 100, and the size of the orthographic projection area on the projection plane can be changed, so that the interference effect of the first baffle 21 can be changed.

[0055] In the embodiment of the present application, when the first baffle 21 is installed, the end away from the pressure relief channel 100 can be in a position with smaller gravitational potential energy relative to the end connected to the wall of the pressure relief channel 100. In this way, the first baffle 21 can rotate when subjected to pressure from the entrance toward the outlet of the pressure relief channel 100, and at the same time, the end with smaller gravitational potential energy will rise and have larger gravitational potential energy. After the pressure is removed, the gravitational potential energy is converted into kinetic energy and reset when it returns to its original position.

[0056] In the embodiment of the present application, one end of the first baffle 21 can be connected to the wall of the pressure relief channel 100 by means of hinge or the like.

[0057] In the embodiment of the present application, when the connecting direction of the two ends of the first baffle 21 is perpendicular to the extension direction of the pressure relief channel 100 , the area of ​​the orthographic projection of the first baffle 21 on the projection plane may be greater than half of the cross-sectional area of ​​the pressure relief channel 100 .

[0058] In some embodiments of the present application, the first baffle 21 rotates at an angle ranging from 45° to 135°.

[0059] It can be understood that, within the above range, the first baffle 21 can maintain its interference effect on the liquid oil during the rotation process to reduce leakage.

[0060] In an embodiment of the present application, the rotatable angle range of the first baffle 21 can be a range consisting of any two values ​​of 45°, 50°, 55°, 60°, 65°, 70°, 75°, 80°, 85°, 90°, 95°, 100°, 105°, 110°, 115°, 120°, 125°, 130° and 135°, or it can be a range consisting of any two other values.

[0061] In the embodiment of the present application, the rotation angle of the first baffle 21 can be the angle formed by the line connecting its two ends and the wall of the pressure relief channel 100, wherein, when the wall of the pressure relief channel 100 tends to be non-planar, the wall of the pressure relief channel 100 that forms an angle with the first baffle 21 can be equivalent to its tangent.

[0062] In the embodiment of the present application, when the first baffle 21 is not subjected to pressure from the inlet toward the outlet of the pressure relief channel 100, the length of the orthographic projection of the line connecting the two ends of the first baffle 21 on the projection plane can be greater than the radius of the pressure relief channel 100 or less than the radius of the pressure relief channel 100.

[0063] In the embodiment of the present application, when the first baffle 21 is at the minimum rotation angle, the length of the orthographic projection of the line connecting the two ends of the first baffle 21 on the projection plane can be greater than the radius of the pressure relief channel 100. When subjected to pressure from the inlet toward the outlet of the pressure relief channel 100, the length of the orthographic projection of the line connecting the two ends of the first baffle 21 on the projection plane begins to change until it is at the maximum rotation angle or in a state of force balance. Among them, when it is at the maximum rotation angle, the length of the line connecting the two ends of the first baffle 21 can be greater than the radius of the pressure relief channel 100, or it can be less than the radius of the pressure relief channel 100.

[0064] In the embodiment of the present application, when the first baffle 21 is at the minimum rotation angle, the length of the orthographic projection of the line connecting the two ends of the first baffle 21 on the projection plane can be less than the radius of the pressure relief channel 100. When subjected to pressure from the inlet toward the outlet of the pressure relief channel 100, the length of the orthographic projection of the line connecting the two ends of the first baffle 21 on the projection plane begins to change until it is at the maximum rotation angle or in a state of force balance. Among them, when it is at the maximum rotation angle, the length of the line connecting the two ends of the first baffle 21 can be greater than the radius of the pressure relief channel 100, or it can be less than the radius of the pressure relief channel 100.

[0065] In the embodiment of the present application, when the first baffle 21 is at the minimum rotation angle, the length of the orthographic projection of the line connecting the two ends of the first baffle 21 on the projection plane can be greater than the radius of the pressure relief channel 100. When subjected to pressure from the entrance to the outlet of the pressure relief channel 100, the length of the orthographic projection of the line connecting the two ends of the first baffle 21 on the projection plane continues to increase until it is equal to the length of the line connecting the two ends of the first baffle 21, and then begins to shrink until it is at the maximum rotation angle. Among them, when it is at the maximum rotation angle, the length of the line connecting the two ends of the first baffle 21 can be greater than the radius of the pressure relief channel 100, or it can be less than the radius of the pressure relief channel 100.

[0066] In the embodiment of the present application, when the first baffle 21 is at the minimum rotation angle, the length of the orthographic projection of the line connecting the two ends of the first baffle 21 on the projection plane can be less than the radius of the pressure relief channel 100. When subjected to pressure from the entrance to the outlet of the pressure relief channel 100, the length of the orthographic projection of the line connecting the two ends of the first baffle 21 on the projection plane continues to increase until it is equal to the length of the line connecting the two ends of the first baffle 21, and then begins to shrink until it is at the maximum rotation angle. Among them, when it is at the maximum rotation angle, the length of the line connecting the two ends of the first baffle 21 can be greater than the radius of the pressure relief channel 100, or it can be less than the radius of the pressure relief channel 100.

[0067] In some of the embodiments of this application, Figure 1 As shown, the flow-blocking assembly 2 includes a limiting portion 22 , and the limiting portion 22 is located on a side of the first baffle 21 facing the entrance of the pressure relief channel 100 .

[0068] It can be understood that the limiting effect of the limiting portion 22 on the first baffle 21 can reduce the situation where the interference side of the first baffle 21 is attached to the wall of the pressure relief channel 100, which is beneficial for the first baffle 21 to still be able to interfere with the liquid oil when the rotation fails.

[0069] In some of the embodiments of this application, Figure 1 As shown, the vent valve further includes a second baffle plate 3 , one end of which is fixedly connected to the wall surface of the pressure relief channel 100 .

[0070] It is understandable that one end of the second baffle 3 is fixedly connected to the wall of the pressure relief channel 100, so that its interference effect on the liquid oil can be maintained, which is conducive to maintaining the flow blocking effect of the vent valve when the first baffle 21 loses its function. In addition, the surface of the second baffle 3 also provides a condensation space for the gaseous oil, which is conducive to the gaseous oil condensing into liquid oil and then flowing back into the rear main reducer assembly.

[0071] In the embodiment of the present application, the second baffle plate 3 can be fixedly connected to the wall of the pressure relief channel 100 through an integral molding process, and can be fixedly connected by bonding, welding, clamping or threaded connection.

[0072] In the embodiment of the present application, the valve body 1 may include a first section 11 and a second section 12, the pressure relief channel 100 sequentially penetrates the first section 11 and the second section 12 along its extension direction, the first baffle 21 is located in the pressure relief channel 100, and the second baffle 3 is located in the pressure relief channel 100 of the second section 12. During production, the first baffle 21 may be arranged at the portion of the pressure relief channel 100 located at the first section 11, and the second baffle 3 may be arranged at the portion of the pressure relief channel 100 located at the second section 12, and finally the first section 11 and the second section 12 are spliced ​​to form the valve body 1, so that the difficulty of assembling the first baffle 21 and the second baffle 3 can be reduced.

[0073] In the embodiment of the present application, the cross-sectional area of ​​the first section 11 may be equal everywhere, equal in part and unequal in part, or unequal in everywhere.

[0074] In the embodiment of the present application, the cross-sectional area of ​​the second section 12 may be equal everywhere, equal in part and unequal in part, or unequal in everywhere.

[0075] In the embodiment of the present application, the cross-sectional area of ​​the portion of the pressure relief channel 100 located in the first section 11 and the cross-sectional area of ​​the portion located in the second section 12 may be the same or different.

[0076] In some of the embodiments of this application, Figure 1 As shown, the number of the second baffles 3 is at least two, and two of the at least two second baffles 3 are arranged at intervals along the extension direction of the pressure relief channel 100 .

[0077] It can be understood that such a configuration is beneficial to improving the interference effect of the second baffle 3 and reducing the leakage of liquid oil.

[0078] In the embodiment of the present application, the number of the second baffles 3 may be two, three, four, or other numbers.

[0079] In some of the embodiments of this application, Figure 1 As shown, the second baffle 3 extends obliquely from one end connected to the wall of the pressure relief channel 100 to the other end along the extension direction of the pressure relief channel 100 toward the inlet of the pressure relief channel 100 .

[0080] It is understandable that such a configuration is beneficial for the surface of the second baffle 3 to interfere with the liquid oil and the gaseous oil, so that the two flow to the end away from the wall of the pressure relief channel 100 under the action of gravity, and then flow back to the rear main reducer assembly.

[0081] In the embodiment of the present application, the inclination angle of the second baffle 3 may range from 45° to 135°.

[0082] In an embodiment of the present application, the inclination angle of the second baffle 3 can be 45°, 50°, 55°, 60°, 65°, 70°, 75°, 80°, 85°, 90°, 95°, 100°, 105°, 110°, 115°, 120°, 125°, 130° and 135°, or other values ​​between 45 and 135°.

[0083] In some of the embodiments of this application, Figure 1 As shown, the two second baffles 3 are respectively located on two opposite sides of the pressure relief channel 100 and are closer to the outlet of the pressure relief channel 100 than the baffle assembly 2 .

[0084] It can be understood that the flow-blocking effect of the second baffle 3 is relatively fixed, and it is closer to the outlet of the pressure relief channel 100 than the flow-blocking component 2, which is beneficial for timely playing the flow-blocking effect when the flow-blocking effect of the flow-blocking component 2 decreases or cannot match the working condition of the rear main reducer assembly, so as to reduce oil leakage.

[0085] A second aspect of the present application provides a rear main reducer assembly, which includes a ventilation valve according to the above technical solution.

[0086] It can be understood that, due to the use of the ventilation valve of the above embodiment, the rear main reducer assembly of the present application has the same technical effect as the above embodiment, which will not be repeated here.

[0087] A third aspect of the present application provides a vehicle, which includes a rear main reducer assembly according to the above technical solution.

[0088] It can be understood that, due to the adoption of the rear main reducer assembly of the above embodiment, the automobile of the embodiment of the present application has the same technical effects as the above embodiment, which will not be repeated here.

[0089] In the embodiment of the present application, the power source of the automobile may be an engine or an electric motor.

[0090] In the present application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. The term "plurality" refers to two or more than two, unless otherwise clearly defined.

[0091] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the present application disclosed herein. The present application is intended to cover any variations, uses or adaptations of the present application, which follow the general principles of the present application and include common knowledge or customary techniques in the art that are not disclosed in the present application. The specification and examples are intended to be exemplary only.

[0092] It should be understood that the present application is not limited to the precise structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. A vent valve, characterized in that: The vent valve comprises a valve body (1) and a flow blocking component (2), wherein: The valve body (1) has a pressure relief channel (100), and the pressure relief channel (100) penetrates the valve body (1) along its extension direction; The baffle assembly (2) is located in the pressure relief channel (100), and is configured to be able to deflect when subjected to pressure from the inlet toward the outlet of the pressure relief channel (100) so as to change the area of ​​its orthographic projection on a projection plane, wherein the projection plane is a plane perpendicular to the extension direction of the pressure relief channel (100).

2. The vent valve according to claim 1, characterized in that The flow blocking assembly (2) comprises a first baffle (21), one end of the first baffle (21) being connected to the wall surface of the pressure relief channel (100), and the first baffle (21) being capable of rotating around the end connected to the wall surface of the pressure relief channel (100).

3. The vent valve according to claim 2, characterized in that: The first baffle (21) rotates at an angle ranging from 45 to 135°.

4. The vent valve according to claim 3, characterized in that: The flow-blocking assembly (2) comprises a limiting portion (22), and the limiting portion (22) is located on a side of the first baffle (21) facing the entrance of the pressure relief channel (100).

5. The vent valve according to claim 1, characterized in that: The vent valve further comprises a second baffle (3), one end of the second baffle (3) being fixedly connected to the wall surface of the pressure relief channel (100).

6. The vent valve according to claim 5, characterized in that The number of the second baffles (3) is at least two, and two of the at least two second baffles (3) are arranged in an interval along the extension direction of the pressure relief channel (100).

7. The vent valve according to claim 6, characterized in that The second baffle (3) extends obliquely from one end connected to the wall surface of the pressure relief channel (100) to the other end along the extension direction of the pressure relief channel (100) toward the entrance of the pressure relief channel (100).

8. The vent valve according to claim 6, characterized in that The two second baffles (3) are respectively located on two opposite sides of the pressure relief channel (100) and are closer to the outlet of the pressure relief channel (100) than the flow blocking component (2).

9. A rear main reducer assembly, characterized in that: The rear final reducer assembly comprises the breather valve according to any one of claims 1 to 8.

10. An automobile, characterized in that: The automobile comprises the rear final drive assembly as claimed in claim 9.

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