Exhaust device and transmission case

Abstract

The utility model relates to the field of transmission case structures, in particular to an exhaust device and a transmission case. The exhaust device is installed on an exhaust hole of the transmission case and comprises a pressure sensor, a driving assembly and an exhaust plug. The venting plug comprises a valve body and a plugging assembly. The valve body is provided with an air inlet and an air outlet; the plugging assembly is located at the air outlet; the pressure sensor is mounted on the outer side of the valve body to detect the pressure in the transmission case; the pressure sensor is in communication connection with the driving assembly so that the driving assembly can drive the blocking assembly to be close to or away from the valve body, and the air outlet is blocked or opened. According to the exhaust device provided by the invention, the pressure change in the transmission box is accurately sensed by arranging the pressure sensor, and the action of the plugging assembly is accurately controlled through the driving assembly, so that the pressure in the transmission box is always kept in a set safety range, and intelligent monitoring and automatic adjustment of the pressure in the transmission box are realized; the safety, the stability and the energy efficiency level of the equipment are obviously improved, and meanwhile, the maintenance cost is reduced.

Description

Technical Field

[0001] This application relates to the field of transmission box structures, and in particular to an exhaust device and a transmission box. Background Technology

[0002] The high-speed operation of a car engine causes the internal oil temperature to rise, leading to the expansion of gases in the cavity and the atomization of lubricating oil. These gases need to be expelled. Currently, most normally closed automatic exhaust systems use spring-controlled valves. Under the influence of high-temperature gases, the springs corrode quickly, gradually weakening or even losing their elasticity, affecting their lifespan. Alternatively, some designs use exhaust valves with labyrinth structures to block atmospheric dust and collect oil mist particles. However, the exhaust valve's efficiency is too low to adjust according to the pressure inside the transmission case, easily leading to abnormal pressure inside the transmission case, affecting vehicle performance and safety. Utility Model Content

[0003] The purpose of this application is to provide an exhaust device and a transmission box that can open or close the exhaust function according to the pressure inside the transmission box, so as to ensure that the pressure inside the transmission box is within a safe range.

[0004] This application provides an exhaust device installed at the exhaust port of a transmission box, the exhaust device including a pressure sensor, a drive assembly, and an exhaust plug;

[0005] The exhaust plug includes a valve body and a sealing assembly; one end of the valve body is provided with an air inlet, which communicates with the cavity of the transmission box; the other end of the valve body is provided with an air outlet; the sealing assembly is located at the air outlet.

[0006] The pressure sensor is installed on the outside of the valve body to detect the pressure inside the transmission box; and the pressure sensor is communicatively connected to the drive assembly so that the drive assembly drives the sealing assembly to move closer to or away from the valve body, thereby blocking or opening the air outlet.

[0007] In the above technical solution, the exhaust plug further includes an isolation chamber;

[0008] The isolation chamber is located inside the valve body, the drive assembly is installed inside the isolation chamber, and the isolation chamber and the valve body are respectively provided with through holes. The drive assembly passes through the through holes to connect to the sealing assembly.

[0009] The isolation chamber is fitted against the inner wall of the valve body to isolate the through hole from the air outlet.

[0010] In the above technical solution, the drive assembly further includes a cylinder and a slide column;

[0011] The cylinder is installed inside the isolation chamber, and the cylinder's air inlet pipe passes through the isolation chamber and the valve body to connect to the air source;

[0012] The slide rod is slidably disposed in the through hole, and one end of the slide rod is connected to the drive shaft of the cylinder, while the other end of the slide rod is connected to the sealing assembly.

[0013] In the above technical solution, the air outlet further includes a plurality of evenly distributed air outlet holes, and the plurality of air outlet holes are located in the circumferential direction of the isolation chamber;

[0014] The isolation chamber has a first air guiding surface at one end near the air inlet to guide the gas from the air inlet to the circumference of the isolation chamber.

[0015] In the above technical solution, the first air guide surface is a conical surface, and the tip of the conical surface is opposite to the center of the air inlet;

[0016] The circumferential sidewall of the isolation chamber is cylindrical, and the conical surface is connected to the circumferential sidewall of the isolation chamber by a circular arc transition.

[0017] In the above technical solution, the sealing assembly further includes a cover plate and a sealing element;

[0018] The drive assembly is connected to the cover plate; the seal is connected to the cover plate; the seal is adapted to the air outlet to block the air outlet.

[0019] In the above technical solution, the sealing component further includes an elastic element;

[0020] The cover plate has a mounting groove, and the elastic element is located in the mounting groove; the elastic element is installed between the cover plate and the sealing element so that the sealing element tends to move closer to the cover plate;

[0021] The groove of the mounting slot is adapted to the seal so that the seal blocks the groove of the mounting slot.

[0022] In the above technical solution, a waterproof and breathable layer is further provided at the air outlet.

[0023] In the above technical solution, the vent plug further includes an oil filter assembly;

[0024] The oil filtration assembly includes a filter screen and / or an oil guide ring; the filter screen is installed at the air inlet to filter impurities and oil mist in the gas;

[0025] The oil guide ring is installed at the air inlet; the oil guide ring is provided with an oil guiding surface to allow oil mist to gather and flow back to the transmission box; the oil guide ring is provided with a second air guiding surface to guide gas to the air outlet.

[0026] This application also provides a transmission box, including the exhaust device described in the above solution.

[0027] Compared with the prior art, the beneficial effects of this application are as follows:

[0028] The exhaust device provided in this application accurately senses pressure changes inside the transmission box by setting a pressure sensor, and precisely controls the action of the sealing component through the drive component, ensuring that the pressure inside the transmission box is always kept within the set safe range. This achieves intelligent monitoring and automatic adjustment of the pressure inside the transmission box, significantly improving the safety, stability and energy efficiency of the equipment, while reducing maintenance costs.

[0029] This application also provides a transmission box, including the exhaust device described in the above solution. Based on the above analysis, it is clear that the transmission box also possesses the aforementioned beneficial effects, which will not be elaborated upon further here. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0031] Figure 1 A first structural schematic diagram of the exhaust device provided in this application;

[0032] Figure 2 A second structural schematic diagram of the exhaust device provided in this application;

[0033] Figure 3 A first cross-sectional structural schematic diagram of the exhaust device provided in this application;

[0034] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0035] Figure 5 This is a second cross-sectional view of the exhaust device provided in this application.

[0036] In the diagram: 101-Valve body; 102-Connecting cylinder; 103-Isolation chamber; 104-Cylinder; 105-Cover plate; 106-Sliding column; 107-Inlet pipe; 108-Pressure sensor; 109-Fixing ring; 110-Lower arc ring; 111-Upper arc ring; 112-Metal filter screen; 113-Fiber filter screen; 114-Seal; 115-Tension spring; 116-Waterproof and breathable layer; 117-Inlet; 118-Outlet; 119-Arc-shaped structure; 120-Mounting groove. Detailed Implementation

[0037] The technical solutions of this application will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0038] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0039] In the description of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0040] Example 1

[0041] See Figures 1 to 5 As shown, the exhaust device provided in this application is installed in the exhaust port of the transmission box. When the air pressure in the transmission box is too high, the exhaust device can automatically open to discharge the gas, thereby enhancing the safety and stability of the vehicle.

[0042] Specifically, the exhaust device includes a pressure sensor 108, a drive assembly, and an exhaust plug. The exhaust plug includes a valve body 101 and a sealing assembly. For example... Figure 1As shown, the valve body 101 is cylindrical. One end of the valve body 101 is provided with an air inlet 117, which communicates with the cavity of the transmission box, so that the inner cavity of the valve body 101 is connected to the cavity of the transmission box. The other end of the valve body 101 is provided with an air outlet, and a sealing component is located at the air outlet to block the air outlet.

[0043] A pressure sensor 108 is installed on the outside of the valve body 101 to detect the pressure inside the transmission box. The pressure sensor 108 is communicatively connected to the drive assembly, enabling the drive assembly to move the sealing assembly closer to or away from the valve body 101, thereby blocking or opening the vent. The pressure sensor 108 monitors the pressure inside the transmission box in real time and transmits the detection result to the drive assembly. When the pressure inside the transmission box exceeds a preset value, the drive assembly immediately drives the sealing assembly away from the vent, thereby opening the vent and enabling rapid venting of the transmission box. When the pressure drops to a safe range, the sealing assembly can move closer to and block the vent again, preventing oil leakage from the gas.

[0044] The exhaust device provided in this application accurately senses pressure changes inside the transmission box by setting a pressure sensor 108, and precisely controls the action of the sealing component through the drive component, ensuring that the pressure inside the transmission box is always kept within the set safe range. This achieves intelligent monitoring and automatic adjustment of the pressure inside the transmission box, significantly improving the safety, stability and energy efficiency of the equipment, while reducing maintenance costs.

[0045] Preferably, the pressure sensor 108 is a corrosion-resistant pressure sensor 108 to adapt to the complex and somewhat corrosive environment inside the transmission box.

[0046] In an optional embodiment, the exhaust plug further includes an isolation chamber 103; the isolation chamber 103 is located inside the valve body 101, the drive component is installed inside the isolation chamber 103, the isolation chamber 103 and the valve body 101 are respectively provided with through holes, the drive component passes through the through holes to connect the sealing component; the isolation chamber 103 is fitted to the inner wall of the valve body 101 to isolate the through holes from the air outlet.

[0047] In this embodiment, such as Figure 3 and Figure 5 As shown, the isolation chamber 103 is located on the inner top wall of the valve body 101, and the drive assembly is installed on the inner bottom wall of the isolation chamber 103 to achieve the installation and fixation of the drive assembly. The drive assembly is installed inside the isolation chamber 103, and the isolation chamber 103 is located inside the valve body 101, enabling the drive assembly to be internally installed, thus increasing the overall integration of the device. Furthermore, the drive assembly located inside the isolation chamber 103 can be isolated from the gas in the transmission box, effectively preventing damage to the drive assembly due to contact with gas, oil mist, or other impurities inside the transmission box.

[0048] Furthermore, the isolation chamber 103 is fitted to the inner wall of the valve body 101 to form a sealed space to isolate the drive assembly from the air outlet, effectively preventing gas leakage from the valve body 101 through the through hole and ensuring the stability and sealing of the internal pressure of the transmission box.

[0049] In an optional embodiment, the air outlet includes a plurality of evenly distributed air outlet holes 118, and the plurality of air outlet holes 118 are located in the circumference of the isolation chamber 103; a first air guiding surface is provided at one end of the isolation chamber 103 near the air inlet 117 to guide the gas from the air inlet 117 to the circumference of the isolation chamber 103.

[0050] In this embodiment, the even distribution of multiple air outlets 118 ensures uniform gas discharge from all directions, avoiding localized pressure concentration and uneven exhaust phenomena that might occur with a single air outlet. The design of the first air guide surface allows gas from the air inlet 117 to be effectively guided circumferentially to the isolation chamber 103, driving the gas to flow around the circumference of the isolation chamber 103, thereby evenly flowing to each air outlet 118, improving gas flow efficiency, reducing gas residence time in the valve body 101, accelerating exhaust speed, and improving the overall system response speed and operating efficiency.

[0051] In an optional embodiment, the drive assembly specifically includes a cylinder 104 and a slide 106. The cylinder 104 is installed inside the isolation chamber 103, and its air inlet pipe 107 passes through the isolation chamber 103 and the valve body 101 to connect to an air source, allowing precise control of the extension and retraction of the drive shaft of the cylinder 104. The slide 106 is slidably disposed within the through hole, with one end of the slide 106 connected to the drive shaft of the cylinder 104 and the other end connected to the sealing assembly. The placement of the slide 106 reduces friction with the through hole, and the through hole also guides the slide 106, ensuring that the sealing assembly accurately covers the air outlet to ensure reliable sealing.

[0052] In this embodiment, the first air guide surface is a conical surface, and the tip of the conical surface is opposite to the center of the air inlet 117; the circumferential sidewall of the isolation chamber 103 is a cylindrical surface, and the conical surface is connected to the circumferential sidewall of the isolation chamber 103 by a circular arc transition.

[0053] In this embodiment, when gas enters the valve body 101 from the inlet 117, the gas can diffuse evenly along the conical surface to flow to the circumference of the isolation chamber 103, thereby flowing evenly to each outlet 118 and improving the efficiency of gas flow. The design of the transition between the conical surface and the arc can effectively guide the gas flow, reduce the eddies and irregular flow formed in the valve body 101, improve the response speed of the exhaust device, ensure that the pressure in the transmission box can be quickly regulated, and enhance the dynamic performance of the system.

[0054] In an optional embodiment, the sealing assembly includes a cover plate 105 and a seal 114; the drive assembly is connected to the cover plate 105; the seal 114 is connected to the cover plate 105; and the seal 114 is adapted to the air outlet to block the air outlet.

[0055] In this embodiment, such as Figures 2 to 5 As shown, multiple air outlets are arranged circumferentially, and the center of the circumference of the multiple air outlets 118 is opposite to the center of the air inlet 117, so as to ensure uniform airflow and improve exhaust efficiency. Correspondingly, the seal 114 is also set as a circular sealing ring to block the multiple circumferentially arranged air outlets 118. Specifically, the seal 114 is an O-ring. The seal 114 is made of elastic material, and under the pressure of the cover plate 105, the seal 114 can deform to reliably seal the multiple air outlets 118.

[0056] In the optional solutions of this embodiment, such as Figure 4 As shown, the sealing assembly also includes an elastic element; the cover plate 105 has a mounting groove 120, and the elastic element is located in the mounting groove 120; the elastic element is installed between the cover plate 105 and the seal 114 so that the seal 114 tends to approach the cover plate 105; the opening of the mounting groove 120 is adapted to the seal 114 so that the seal 114 blocks the opening of the mounting groove 120.

[0057] In this embodiment, the elastic element is specifically a tension spring 115. The sealing element 114 below the cover plate 105 is fixed by the tension spring 115, which can increase the firmness of the connection. The tension spring 115 allows the sealing element 114 to abut against and seal the opening of the mounting groove 120. The opening is also provided with an arc-shaped structure 119 to fit the O-ring. Under the tension of the tension spring 115, the O-ring can seal the mounting groove 120, preventing the gas discharged from the vent from corroding the tension spring 115.

[0058] In an optional embodiment, a waterproof and breathable layer 116 is provided at the air outlet.

[0059] In this embodiment, the waterproof and breathable layer 116 is used to prevent external water and dust from entering the valve body 101, ensuring the normal venting function of the valve body 101 and ensuring the stable pressure balance inside the transmission box. As shown in the figure, the waterproof and breathable layer 116 is fixedly connected to the valve body 101 and is located above the valve body 101. The waterproof and breathable layer 116 is annular, thus correspondingly covering the multiple circumferentially arranged vent holes 118. The side of the waterproof and breathable layer 116 facing the sealing element 114 is also provided with an arc-shaped groove to fit the O-ring, thereby ensuring a reliable sealing effect on the vent.

[0060] More specifically, the waterproof and breathable layer 116 is made of polytetrafluoroethylene (PTFE). PTFE has extremely excellent chemical stability, weather resistance and low coefficient of friction. Its unique microporous structure makes the membrane pore size at the nanometer level. These micropores can allow gas molecules to pass through freely and achieve smooth exhaust, while effectively blocking external liquid water and dust particles with a diameter larger than the micropore size.

[0061] In an optional embodiment, the exhaust plug further includes a connecting cylinder 102; the connecting cylinder 102 is connected to the valve body 101, and the inner ring of the connecting cylinder 102 communicates with the air inlet 117; the outer ring of the connecting cylinder 102 is used to connect to the exhaust port. Specifically, the connecting cylinder 102 is made of metal, and the outer side of the connecting cylinder 102 is threaded so that the connecting cylinder 102 can be threadedly connected to the exhaust port of the transmission box, thus realizing the installation and fixation of the exhaust device, and the threaded connection facilitates the disassembly and assembly of the device.

[0062] Example 2

[0063] The exhaust device in this second embodiment is an improvement on the above embodiments. The technical content disclosed in the above embodiments will not be described again, and the content disclosed in the above embodiments also belongs to the content disclosed in this second embodiment.

[0064] See Figure 3 and Figure 5 As shown, in an optional embodiment, the exhaust plug further includes an oil filter assembly; the oil filter assembly includes a filter screen and an oil guide ring; the filter screen is installed at the air inlet 117 to filter impurities and oil mist in the gas; the oil guide ring is installed at the air inlet 117 and has an oil guide surface to allow oil mist to converge and flow back to the transmission box; the oil guide ring has a second air guide surface to guide the gas to the air outlet.

[0065] In this embodiment, the filter screen includes a retaining ring 109 and a filter screen component. The retaining ring 109 surrounds the circumference of the filter screen component, and the outer ring of the retaining ring 109 is connected to the inner wall of the valve body 101 to install the filter screen component inside the valve body 101. The filter screen component includes a high-precision metal filter screen 112 and / or a fiber filter screen 113. Along the gas flow direction, the metal filter screen 112 and the fiber filter screen 113 are arranged sequentially to filter the gas.

[0066] Specifically, the high-precision metal filter 112 is used to filter impurities entering the valve body 101. It is made of stainless steel using a precision weaving process, possessing excellent strength and corrosion resistance, and can adapt to the complex and somewhat corrosive environment inside the transmission box. The fiber filter 113 filters high-temperature oil mist. It is made of polyester fiber or glass fiber. The fiber filter 113 uses multiple mechanisms such as inertial collision, interception, and diffusion to adsorb tiny impurities and oil mist onto the fiber surface, further purifying the discharged gas, improving the filtration effect, and avoiding environmental pollution.

[0067] In addition, the oil guide ring includes an upper arc-shaped ring 111 and a lower arc-shaped ring 110. The upper arc-shaped ring 111 is located above the filter screen, and the lower arc-shaped ring 110 is located below the filter screen. Along the gas flow direction, the gas first contacts the oil guide surface of the lower arc-shaped ring 110. The oil mist in the gas gathers into oil on the oil guide surface, and the arc-shaped oil guide surface drives the oil to automatically flow back to the transmission box under the action of gravity. The upper arc-shaped ring 111 is provided with an arc-shaped second air guide surface, which can guide the gas to the circumference of the isolation chamber 103 so that the gas is discharged from the air outlet.

[0068] Example 3

[0069] Embodiment 3 of this application provides a transmission box that includes the exhaust device of any of the above embodiments, and thus has all the beneficial technical effects of the exhaust device of any of the above embodiments, which will not be repeated here.

[0070] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application. In addition, those skilled in the art can understand that although some embodiments herein include certain features included in other embodiments but not other features, combinations of features from different embodiments are meant to be within the scope of this application and form different embodiments.

Claims

1. An exhaust device, installed at the exhaust port of a transmission box, characterized in that, The exhaust device includes a pressure sensor, a drive assembly, and an exhaust plug; The exhaust plug includes a valve body and a sealing assembly; one end of the valve body is provided with an air inlet, which communicates with the cavity of the transmission box; the other end of the valve body is provided with an air outlet; the sealing assembly is located at the air outlet. The pressure sensor is installed on the outside of the valve body to detect the pressure inside the transmission box; and the pressure sensor is communicatively connected to the drive assembly so that the drive assembly drives the sealing assembly to move closer to or away from the valve body, thereby blocking or opening the air outlet.

2. The exhaust device according to claim 1, characterized in that, The vent plug also includes an isolation chamber; The isolation chamber is located inside the valve body, the drive assembly is installed inside the isolation chamber, and the isolation chamber and the valve body are respectively provided with through holes. The drive assembly passes through the through holes to connect with the sealing assembly. The isolation chamber is fitted against the inner wall of the valve body to isolate the through hole from the air outlet.

3. The exhaust device according to claim 2, characterized in that, The drive assembly includes a cylinder and a slide; The cylinder is installed inside the isolation chamber, and the cylinder's air inlet pipe passes through the isolation chamber and the valve body to connect to the air source; The slide rod is slidably disposed in the through hole, and one end of the slide rod is connected to the drive shaft of the cylinder, while the other end of the slide rod is connected to the sealing assembly.

4. The exhaust device according to claim 2, characterized in that, The air outlet includes a plurality of evenly distributed air outlets, and the plurality of air outlets are located circumferentially in the isolation chamber; The isolation chamber has a first air guiding surface at one end near the air inlet to guide the gas from the air inlet to the circumference of the isolation chamber.

5. The exhaust device according to claim 4, characterized in that, The first air guide surface is a conical surface, and the tip of the conical surface is opposite to the center of the air inlet; The circumferential sidewall of the isolation chamber is cylindrical, and the conical surface is connected to the circumferential sidewall of the isolation chamber by a circular arc transition.

6. The exhaust device according to claim 1, characterized in that, The sealing assembly includes a cover plate and a seal; The drive assembly is connected to the cover plate; the seal is connected to the cover plate; the seal is adapted to the air outlet to block the air outlet.

7. The exhaust device according to claim 6, characterized in that, The sealing assembly also includes an elastic element; The cover plate has a mounting groove, and the elastic element is located in the mounting groove; the elastic element is installed between the cover plate and the sealing element so that the sealing element tends to move closer to the cover plate; The groove of the mounting slot is adapted to the seal so that the seal blocks the groove of the mounting slot.

8. The exhaust device according to claim 1, characterized in that, A waterproof and breathable layer is provided at the air outlet.

9. The exhaust device according to claim 1, characterized in that, The vent plug also includes an oil filter assembly; The oil filtration assembly includes a filter screen and / or an oil guide ring; the filter screen is installed at the air inlet to filter impurities and oil mist in the gas; The oil guide ring is installed at the air inlet; the oil guide ring is provided with an oil guiding surface to allow oil mist to gather and flow back to the transmission box; the oil guide ring is provided with a second air guiding surface to guide gas to the air outlet.

10. A transmission box, characterized in that, Includes the exhaust device as described in any one of claims 1 to 9.

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