Transmission ventilation system and vehicle

Abstract

The utility model provides a transmission ventilation system and a vehicle, and belongs to the technical field of vehicles, the transmission ventilation system utilizes the arrangement of a first chamber and a ventilation pipe, the first ventilation pipe is connected with a transmission shell and spans a motor shell cavity to enter the upper end of an inner cavity of a flywheel shell, and the spanning distance is large; oil gas can be greatly condensed in the vent pipe. And outside water and sand are difficult to enter the cavity of the flywheel shell through the first breather pipe, so that oil leakage caused by damage to an input shaft oil seal at the inner cavity of the flywheel shell and rusting and abrasion caused by damage to the dual-mass flywheel are avoided. A small amount of foreign matters entering the inner cavity of the flywheel casing from the first breather pipe are accumulated in the inner cavity of the flywheel casing, so that the problem of oil pollution caused by invasion of water and sand grains is avoided, the conditions of early-stage rapid abrasion of a shaft gear system, blockage of a hydraulic valve body, oil emulsification, rusting of a clutch and the like are reduced, the service life of a transmission is prolonged, and the service life of the transmission is prolonged. The method is suitable for driving of the vehicle in complex scenes such as wading road conditions and deep cross-country.

Description

TECHNICAL FIELD

[0001] The utility model belongs to vehicle technical field, more specifically, relate to a transmission ventilation system and vehicle. BACKGROUND

[0002] In the operation process of the automobile transmission, with its continuous work, the running friction of the internal parts makes the temperature gradually increase, and the pressure also increases. When the internal pressure reaches a certain degree, if the gas cannot be effectively removed in time, it will cause the oil seal to bear excessive pressure, and further cause oil leakage problem, which is very harmful to the normal operation and service life of the transmission.

[0003] The traditional solution is to add a vent plug or vent pipe on the top of the transmission to achieve internal and external air pressure balance and to discharge excess gas. However, the conventional arrangement is often to install the vent plug or vent pipe directly on the transmission housing, so that the oil gas discharged will condense into oil stains on the surface of the transmission, causing customer complaints. Under actual vehicle driving conditions, especially in the face of water road conditions and deep off-road scenes, this simple and direct installation method exposes serious defects. Water and sand from the outside can easily enter the transmission interior through the vent plug opening, causing oil pollution, early and rapid wear of the shaft tooth system, blockage of the hydraulic valve body, emulsification of the oil, and rusting of the clutch. Or through the sand leakage hole, continuously enter the flywheel cavity, cause the oil seal to abnormally wear and leak, and the flywheel to rust and wear severely. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a transmission ventilation system, which aims to solve the problem of oil stains discharged from the transmission deposited on the surface of the transmission and the engine compartment of the whole vehicle, and the problem of a large amount of water and sand entering the flywheel cavity, which causes the oil seal to wear and leak and the double-mass flywheel to wear and rust. Water and sand from the outside can easily enter through the vent plug or vent pipe on the upper end of the transmission housing, causing oil pollution, early and rapid wear of the shaft tooth system, blockage of the hydraulic valve body, emulsification of the oil, and rusting of the clutch.

[0005] To achieve the above-mentioned purpose, the utility model adopts the technical scheme of: providing a transmission ventilation system, comprising a transmission housing, a motor housing and a flywheel housing connected in sequence, a first chamber is formed between the opposite surfaces of the transmission housing and the motor housing, the first chamber communicates with the inner cavity of the transmission housing and is located above the inner cavity of the transmission housing, the transmission ventilation system further comprises a first vent pipe and a second vent pipe;

[0006] The first end of the first vent pipe is sealingly connected to the top of the flywheel shell, the second end of the first vent pipe is sealingly connected to the top of the motor shell near one end of the transmission shell and communicates with the first chamber, the first end of the second vent pipe is sealingly connected to the top of the flywheel shell, and the second end of the second vent pipe is provided with a vent pipe cap.

[0007] In a possible implementation, the first end of the first vent pipe and the first end of the second vent pipe are each provided with a first clamping joint, the outer periphery of the first clamping joint is sleeved with a first sealing ring, and the first clamping joint is clamped and sealed to the top of the flywheel shell by means of the first sealing ring, thereby avoiding gas leakage of the flywheel shell and ensuring the sealing property thereof.

[0008] In a possible implementation, the second end of the first vent pipe is provided with a second clamping joint, the outer periphery of the second clamping joint is sleeved with a second sealing ring, and the second clamping joint is clamped and sealed to the top of the motor shell by means of the second sealing ring, thereby avoiding gas leakage of the flywheel shell and ensuring the sealing property thereof.

[0009] In a possible implementation, the lower end surface of the vent pipe cap is provided with a plug joint in the middle, the plug joint is interference-fitted to the second end of the second vent pipe, the lower end surface of the vent pipe cap is provided with a downwardly bent flange at the outer periphery, and the flange surrounds the periphery of the second end of the second vent pipe, thereby preventing water, dust and impurities in the external environment from entering the inside of the vent pipe through the connection, avoiding pollution to the transmission venting system, and further ensuring the normal operation of the transmission.

[0010] In a possible implementation, the first recess is arranged on the upper part of the end surface of the side of the transmission shell near the motor shell, the second recess is arranged on the upper part of the end surface of the side of the motor shell near the transmission shell, and the first recess and the second recess are oppositely combined to form the first chamber, thereby facilitating the cleaning and maintenance work of the maintenance personnel on the inside of the first chamber.

[0011] In a possible implementation, a plurality of oil blocking ribs are arranged in the first chamber in an alternating manner, which can block oil droplets, realize efficient separation of oil gas, and reduce the loss caused by the discharge of oil with gas.

[0012] In a possible implementation, the first end of the first vent pipe and the first end of the second vent pipe have a cooling gap therebetween, the cooling gap has a relatively large span, can cause the oil gas to be substantially condensed in the vent pipe, and can make the oil gas generated at the end of the transmission shell be fully condensed in the flywheel cavity after being condensed by the first vent pipe, and the remaining small amount of oil gas after condensation is discharged to the atmosphere from the second vent pipe, so that the condensed oil in the flywheel cavity will not produce condensed oil stains outside the transmission, causing customer complaints, and the condensed oil stains are transferred from the outside to the flywheel cavity.

[0013] In a possible implementation, an engine is connected to one end of the flywheel shell away from the motor shell, and a sealing pad layer is arranged between the engine and the motor shell, effectively blocking external impurities, ensuring that the space between the engine and the motor shell remains clean, and reducing potential failure risks.

[0014] In a possible implementation, the sealing pad layer is made of paper or composite rubber.

[0015] The transmission ventilation system has the advantages that, compared with the prior art, the transmission shell, the motor shell and the flywheel shell are sequentially connected, a first chamber is formed between the opposite surfaces of the transmission shell and the motor shell, the chamber is communicated with the inner cavity of the transmission shell and is located above the inner cavity, and the flow path of the gas is changed by using the chamber structure. The first ventilation pipe is arranged, the first end of the first ventilation pipe is sealingly connected to the top of the flywheel shell, the second end of the first ventilation pipe is sealingly connected to the top of one end of the motor shell close to the transmission shell and is communicated with the first chamber, so that the gas in the transmission can flow through the first ventilation pipe and the first chamber. Meanwhile, the second ventilation pipe is arranged, the first end of the second ventilation pipe is sealingly connected to the top of the flywheel shell, and the second end of the second ventilation pipe is provided with a ventilation pipe cap, so that the channel for discharging the gas is further improved, and the outlet of the second ventilation pipe can be protected to a certain extent.

[0016] The transmission ventilation system changes the mode that the ventilation plug or the ventilation pipe is directly mounted on the transmission shell, the first chamber and the ventilation pipe are arranged, so that the water and the sand particles from the outside are difficult to directly enter the transmission through the ventilation channel, the problem of oil pollution caused by the invasion of the water and the sand particles is avoided, the early rapid wear of the shaft tooth system, the blockage of the hydraulic valve body, the emulsification of the oil and the rusting of the clutch are reduced, and the service life of the transmission is prolonged. The oil and gas in the transmission can be introduced into the inner cavity of the flywheel shell to be condensed through the arrangement of the first ventilation pipe and the second ventilation pipe, the problem that the customer complains about the dirty caused by the condensation of the oil and gas in the transmission is avoided. The design of the ventilation system can adapt to the driving of the vehicle in the complex scenes such as the water-involved road and the deep off-road, and the working reliability and stability of the transmission in the harsh environment are improved.

[0017] The utility model also provides a vehicle which comprises the transmission ventilation system.

[0018] The vehicle has the same advantages as the transmission ventilation system, and details are not repeated here. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor.

[0020] Figure 1 A front view of a transmission ventilation system provided by the embodiments of the present application is provided.

[0021] Figure 2 A Figure 1 A sectional view along A-A is provided.

[0022] Figure 3 A Figure 2 A local enlarged view at B is provided.

[0023] Figure 4 A Figure 2 A local enlarged view at C is provided.

[0024] Figure 5 A Figure 2 A local enlarged view at D is provided.

[0025] Figure 6 A Figure 2 A local enlarged view at E is provided.

[0026] Figure 7 A structure schematic view of a transmission ventilation system provided by the embodiments of the present application is provided.

[0027] In the figure: 1, transmission housing; 2, motor shell; 3, flywheel shell; 4, first chamber; 5, oil baffle; 6, first ventilation pipe; 7, second ventilation pipe; 8, ventilation pipe cap; 9, first clamping joint; 10, first sealing ring; 11, second clamping joint; 12, second sealing ring; 13, plug joint; 14, flange; 15, cooling gap; 16, sealing pad layer; 17, sealing end plate; 18, clamping end pipe; 19, connecting end pipe; 20, engine. DETAILED DESCRIPTION

[0028] In order to make the technical problems, technical solutions and beneficial effects of the present application more clearly understood, the following will further describe the present application in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application, and are not used to limit the present application.

[0029] Unless otherwise explicitly defined, the terms such as "first", "second" or "third" are used only to distinguish different objects, and are not used to describe a specific order.

[0030] Unless otherwise clearly defined, the orientation words such as the terms "center", "transverse", "longitudinal", "horizontal", "vertical", "top", "bottom", "inner", "outer", "upper", "lower", "front", "back", "left", "right", "clockwise", "counterclockwise", "high", "low", etc. indicate the orientation or positional relationship based on the orientation and positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation or be constructed and operated in a particular orientation, so it cannot be understood as limiting the specific protection scope of the utility model.

[0031] Please refer to Figure 1 and Figure 2 , now a kind of transmission ventilation system provided by the utility model will be described.A kind of transmission ventilation system, including transmission housing 1, motor shell 2 and flywheel shell 3 connected in sequence, first chamber 4 is formed between the opposite surface of transmission housing 1 and motor shell 2, first chamber 4 is communicated with the inner cavity of transmission housing 1 and is located above the inner cavity of transmission housing 1, and the transmission ventilation system further includes first ventilation pipe 6 and second ventilation pipe 7;The first end of first ventilation pipe 6 is sealingly connected to the top of flywheel shell 3, the second end of first ventilation pipe 6 is sealingly connected to the top of one end of motor shell 2 close to transmission housing 1 and communicated with first chamber 4, the first end of second ventilation pipe 7 is sealingly connected to the top of flywheel shell 3, and the second end of second ventilation pipe 7 is provided with ventilation pipe cap 8.

[0032] Compared with the prior art, the transmission ventilation system provided by the utility model is connected in sequence by setting transmission housing 1, motor shell 2 and flywheel shell 3, and first chamber 4 is formed between the opposite surface of transmission housing 1 and motor shell 2, the chamber is communicated with the inner cavity of transmission housing 1 and is located above it, and the flow path of gas is changed by using the chamber structure.The first end of first ventilation pipe 6 is sealingly connected to the top of flywheel shell 3, and the second end is sealingly connected to the top of one end of motor shell 2 close to transmission housing 1 and communicated with first chamber 4, so that the gas in the transmission can flow through first chamber 4 through first ventilation pipe 6.At the same time, the first end of second ventilation pipe 7 is sealingly connected to the top of flywheel shell 3, and the second end is provided with ventilation pipe cap 8, which further improves the channel for discharging gas, and ventilation pipe cap 8 can protect the outlet of second ventilation pipe 7.

[0033] The transmission ventilation system changes the mode that the air inlet plug or the air inlet pipe is directly installed on the transmission housing 1, utilizes the arrangement of the first chamber 4 and the air inlet pipe, so that the water and the sand particles in the outside are difficult to directly enter the transmission through the air inlet channel, avoids the oil pollution problem caused by the invasion of the water and the sand particles, thereby reduces the early rapid wear of the shaft tooth system, the blockage of the hydraulic valve body, the oil emulsification and the rust of the clutch, and prolongs the service life of the transmission.

[0034] Please refer to Figures 2-3 The first end of the first air inlet pipe 6 and the first end of the second air inlet pipe 7 are provided with first clamping joints 9, the outer periphery of the first clamping joint 9 is sleeved with a first sealing ring 10, and the first clamping joint 9 is clamped and sealed to the top of the flywheel housing 3 by means of the first sealing ring 10. Specifically, the first clamping joint 9 comprises a connecting end pipe 19 at the upper part and a clamping end pipe 18 at the lower part, the connecting end pipe 19 is inserted into the first end of the first air inlet pipe 6, and the two are in interference fit, so as to ensure the sealing property. The clamping end pipe 18 is inserted into the reserved clamping hole formed in the top of the flywheel housing 3, the end part of the clamping end pipe 18 is provided with an elastic clamping block, which can be inwardly folded during the insertion process of the clamping end pipe 18, and is opened after complete insertion to realize stable clamping cooperation. In addition, the middle part of the first clamping joint 9 is circumferentially provided with a sealing end plate 17, which abuts against the upper end of the reserved clamping hole after the first clamping joint 9 is completely inserted into the reserved clamping hole, so as to form the port sealing of the reserved clamping hole. The first sealing ring 10 is sleeved on the outer wall of the clamping end pipe 18, and is inserted into the reserved clamping hole together with the clamping end pipe 18, so as to avoid the gas leakage of the flywheel housing 3.

[0035] Preferably, in order to further enhance the stability and sealing of the connection, a plurality of annular sealing ribs are added to the part of the connecting end pipe 19 inserted into the first vent pipe 6. These ribs are in close contact with the inner wall of the first vent pipe 6, further enhancing the sealing performance of the connection, effectively preventing gas leakage even under extreme working conditions such as high temperature, high pressure, and severe vehicle vibration. At the same time, the surface of the elastic clamping block is designed with a sawtooth shape. When the elastic clamping block is fully opened and in contact with the inner wall of the reserved clamping hole, the sawtooth structure can increase the friction with the hole wall, preventing the first clamping joint 9 from loosening due to vibration during vehicle operation. Furthermore, reinforcing ribs are added to the inside of the elastic clamping block to enhance the structural strength of the elastic clamping block, making it less prone to damage during frequent plugging and unplugging, thereby extending the service life of the first clamping joint 9. On the contact surface between the sealing end plate 17 and the upper end of the reserved clamping hole, a layer of flexible sealing gasket is added. The sealing gasket is made of high-temperature-resistant and aging-resistant rubber material, with good elasticity and sealing performance. When the sealing end plate 17 is in contact with the upper end of the reserved clamping hole, the flexible sealing gasket can fill the small gap between the sealing end plate 17 and the hole wall, further improving the port sealing effect, effectively blocking external dust, moisture and other impurities from entering, while preventing gas leakage from the flywheel housing 3.

[0036] Please refer to Figure 2 and Figure 4 , the second end of the first vent pipe 6 is provided with a second clamping joint 11, and the outer periphery of the second clamping joint 11 is sleeved with a second sealing ring 12. The second clamping joint 11 is clamped and sealed to the top of the motor housing 2 by means of the second sealing ring 12. The second clamping joint 11 has the corresponding structure of the first clamping joint 9, and also includes the connecting end pipe 19 at the upper part, the clamping end pipe 18 at the lower part, and the sealing end plate 17 at the middle part. In addition, the connecting end pipe 19 of the second clamping joint 11 is inclined towards the flywheel housing 3. When the first vent pipe 6 is connected to the second clamping joint 11, the bending degree of the second end of the first vent pipe 6 can be reduced.

[0037] Preferably, a wave-shaped elastic gasket is added to the contact surface between the sealing end plate 17 of the second clamping joint 11 and the upper end of the reserved clamping hole on the top of the motor housing 2. The elastic gasket is made of high-elasticity rubber material, and its wave-shaped structure design makes it have better elastic deformation ability. When the second clamping joint 11 is installed in place, the wave-shaped elastic gasket between the sealing end plate 17 and the top of the motor housing 2 will be compressed. The wave-shaped structure can make the elastic gasket produce uniform elastic force in all directions, further filling the small gap between the sealing end plate 17 and the top of the motor housing 2, and improving the sealing performance. At the same time, the wave-shaped elastic gasket also has a buffering effect, which can alleviate the influence of vibration generated during vehicle operation on the connection part of the second clamping joint 11, protect the connection surface of the sealing end plate 17 and the top of the motor housing 2, and avoid wear and loosening caused by vibration.

[0038] Referring to Figure 2 and Figure 5 The lower end surface of the breather cap 8 is provided with a spigot 13 in the middle, which is inserted into the second end of the second breather pipe 7 in an interference fit. A ring-shaped sealing protrusion can be added to the part where the spigot 13 connects with the second breather pipe 7. These sealing protrusions are evenly distributed along the circumferential direction of the spigot 13 and have a certain elasticity. When the spigot 13 is inserted into the second end of the second breather pipe 7 in an interference fit, the sealing protrusions will be deformed by being pressed, filling the small gap between the spigot 13 and the second breather pipe 7, further enhancing the sealing of the connection between the two, preventing water, dust and impurities from the outside from entering the breather pipe through the connection, avoiding pollution to the transmission breather system, and thus ensuring the normal operation of the transmission. The lower end surface of the breather cap 8 is provided with a downwardly bent flange 14 around the outer periphery, which surrounds the circumferential direction of the second end of the second breather pipe 7. On the inner side surface of the flange 14, a circle of soft bristles is arranged. These bristles are made of corrosion-resistant and wear-resistant materials, such as nylon. When the flange 14 surrounds the circumferential direction of the second end of the second breather pipe 7, the bristles can tightly fit the outer wall of the second breather pipe 7. During the driving of the vehicle, the bristles can play a role in preliminary filtration, intercepting larger particles of dust and impurities in the air, preventing them from entering the breather pipe through the gap between the breather cap 8 and the second breather pipe 7. At the same time, the bristles can also play a certain sealing role, enhancing the wrapping effect of the flange 14 on the second breather pipe 7, further blocking the intrusion of external pollutants.

[0039] Optionally, to achieve the venting function of the vent cap, a one-way valve can be installed inside the vent cap 8. This allows gas to flow out from the inside of the second vent pipe 7 to the outside, while preventing external gas or impurities from entering in the reverse direction. When the internal pressure of the flywheel housing 3 increases, the gas generates sufficient pressure to push the one-way valve open, thus allowing gas to be discharged smoothly. When the external pressure is higher than the internal pressure, or when foreign objects attempt to enter, the one-way valve will automatically close, providing a good barrier. This venting method effectively prevents the intrusion of external impurities, greatly improving the protective performance of the venting system and ensuring a clean environment inside the transmission. However, the installation of the one-way valve increases the structural complexity and cost of the vent cap 8. Furthermore, during long-term use, the one-way valve may become loose or inflexible in opening and closing due to oil stains, impurities, etc., affecting the venting effect and protective performance, requiring regular maintenance and inspection. Alternatively, a filter layer can be installed inside the vent cap 8; common filter materials include fiber filters and activated carbon. When gas is discharged through the vent cap 8, the filter layer filters the gas, intercepting impurities to ensure clean exhaust gas and prevent external impurities from entering the ventilation system. The fiber filter effectively filters larger particles, while activated carbon adsorbs fine particles and some harmful gases. This filtration-based ventilation system provides good protection and is suitable for various driving environments. However, the filter layer needs to be replaced or cleaned regularly; otherwise, accumulated impurities will clog the filter layer, affecting ventilation efficiency. Furthermore, different types of filter materials have varying filtration effects on different impurities, requiring the selection of appropriate filter materials based on the vehicle's actual operating environment.

[0040] Please see Figure 2 and Figure 6 A first recess is provided on the upper part of the end face of the transmission housing 1 near the motor housing 2, and a second recess is provided on the upper part of the end face of the motor housing 2 near the transmission housing 1. The first and second recesses are joined together to form a first chamber 4. The joining of the first and second recesses to form the first chamber 4 facilitates cleaning and maintenance work inside the first chamber 4, maintains the efficient operation of the ventilation system, and reduces the probability of failure due to untimely maintenance. Multiple oil baffles 5 are arranged alternately inside the first chamber 4. When the oil-gas mixture passes through the oil baffles 5, oil droplets are intercepted by the oil baffles 5, adhere to the oil baffles 5, and gradually gather into larger oil droplets. Finally, under the action of gravity, the oil flows back into the inner cavity of the transmission housing 1, achieving efficient oil-gas separation and reducing the loss caused by oil being discharged with gas.

[0041] Please see Figure 3The cooling gap 15 is provided between the first end of the first breather pipe 6 and the first end of the second breather pipe 7. During the operation of the vehicle, the engine 20 and the transmission and other components will generate a large amount of heat. If the first end of the first breather pipe 6 and the first end of the second breather pipe 7 are in direct contact, the heat will be quickly transferred through the metal conduction, which may cause the gas temperature in the breather pipe to be too high. The high temperature will make the gas expand, affect the air pressure balance in the breather system, and then interfere with the normal exhaust process. The presence of the cooling gap 15 effectively cuts off the heat conduction path, reduces the heat influence between each other, ensures that the gas in the two breather pipes can flow in a relatively stable temperature environment, maintains the normal air pressure balance of the breather system, and guarantees the stable operation of the transmission. Preferably, the cooling gap 15 can be filled with high-efficiency thermal insulation materials such as ceramic fiber, aerogel, etc. The ceramic fiber has the characteristics of low thermal conductivity, high temperature resistance, good chemical stability, etc., which can further reduce the heat transfer between the first end of the first breather pipe 6 and the first end of the second breather pipe 7. Aerogel is a super-light and high-porosity material, which has excellent thermal insulation performance and can provide strong thermal insulation effect in a very small space. After filling these materials, the thermal insulation effect is significantly improved, and even in the case of extremely high heat generated by the engine 20 and the transmission, the suitable temperature environment in the breather pipe can be better maintained.

[0042] In addition, the cooling gap 15 has a relatively large span, and the first end of the first breather pipe 6 and the first end of the second breather pipe 7 are respectively arranged on the left and right sides of the upper end of the flywheel housing 3, which can greatly condense the oil gas in the breather pipe. The oil gas generated at the end of the transmission housing can be condensed through the first breather pipe 6, and the oil gas in the first breather pipe 6 flows and condenses in the inner cavity of the flywheel housing 3, leaving only a small amount of oil gas, which is then discharged to the atmosphere through the second breather pipe 7. Therefore, the condensate oil stain will not be generated outside the transmission, causing customer complaints. That is, the condensate oil stain is transferred from the outside to the inner cavity of the flywheel housing 3.

[0043] Please refer to Figure 7, the end of the flywheel shell 3 away from the motor shell 2 is connected with the engine 20, and a sealing gasket layer 16 is arranged between the engine 20 and the motor shell 2. In the prior art, there is a sand leakage hole between the engine 20 and the motor shell 2 at the bottom, which, although facilitating the discharge of a small amount of sand that may enter to some extent, brings about serious hidden dangers. When the vehicle is running in a sandy environment or a waterlogged road section, sand and water from the outside are extremely easy to enter the area between the engine 20 and the motor shell 2 through the sand leakage hole. After the sand enters, it may wear the contact surfaces of the engine 20 and the motor shell 2, affecting the sealing performance, and may also enter the internal mechanical structure, aggravating the wear of the components. After the water enters, not only will it cause the metal components to rust and corrode, but also may affect the normal work of the electrical elements, causing short circuit and other faults, seriously threatening the safety of the power system of the vehicle. After the improvement, the sand leakage hole is closed by arranging the sealing gasket layer 16, completely blocking the entry channel of sand and water. The sealing gasket layer 16 closely fits the connecting surfaces of the engine 20 and the motor shell 2, and effectively blocks the impurities from the outside by using its elasticity and sealing performance. Even if the vehicle is running in a harsh environment, the space between the engine 20 and the motor shell 2 can be kept clean, reducing the potential risk of failure. The engine 20 and the motor shell 2 are in a closed state through the sealing gasket layer 16, and when the engine 20 and the motor shell 2 are installed together, the sealing gasket layer 16 is pressed between the two. Its flexibility enables it to closely fit the connecting surfaces of the engine 20 and the motor shell 2, and even if there are slight irregularities on these surfaces, the sealing gasket layer 16 can fill the gaps and prevent external substances from entering.

[0044] Preferably, the material of the sealing gasket layer 16 is paper or composite rubber. Paper has a relatively soft texture, which can better fit the connecting surfaces of the engine 20 and the motor shell 2, filling the tiny gaps and playing a preliminary sealing role. Composite rubber is a mixture of various rubber materials and additives, which combines the excellent performance of various rubbers, has good elasticity, flexibility, wear resistance and corrosion resistance. It can maintain stable performance within a wide temperature range, adapting to the high temperature, vibration and other complex environments generated by the engine 20 and the motor shell 2 during work. If the vehicle mainly runs on urban roads with good road conditions and relatively mild environment, and is more sensitive to cost, the paper sealing gasket layer 16 can be a cost-effective choice under the condition of meeting the basic sealing requirements, but it needs to be checked regularly and replaced in time if damaged. For vehicles that often run in harsh environments, such as off-road conditions, high-temperature areas or humid environments, the composite rubber sealing gasket layer 16 is more suitable, although the cost is higher, but it can provide more reliable sealing performance, effectively protect the engine 20 and the motor shell 2, reduce the probability of failure, and in the long run, it can also reduce the maintenance cost and repair frequency of the vehicle.

[0045] Based on the same inventive concept, the utility model still provides a kind of vehicle, the vehicle uses the transmission ventilation system described above, thus has and the same beneficial effect of the transmission ventilation system described above, and here no longer repeat.

[0046] The above merely describes preferred embodiments of the utility model, and is not used to limit the utility model, and any modification, equivalent replacement and improvement etc. made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A transmission breather system characterized by, The transmission ventilation system comprises a transmission housing (1), a motor housing (2) and a flywheel housing (3) connected in sequence, a first chamber (4) is formed between opposite surfaces of the transmission housing (1) and the motor housing (2), the first chamber (4) is communicated with and located above an inner cavity of the transmission housing (1), and the transmission ventilation system further comprises a first ventilation pipe (6) and a second ventilation pipe (7). A first end of the first ventilation pipe (6) is sealingly connected to a top of the flywheel housing (3), a second end of the first ventilation pipe (6) is sealingly connected to a top of one end of the motor housing (2) close to the transmission housing (1) and communicated with the first chamber (4), a first end of the second ventilation pipe (7) is sealingly connected to the top of the flywheel housing (3), and a second end of the second ventilation pipe (7) is provided with a ventilation pipe cap (8).

2. A transmission breather system as in claim 1, wherein, The first end of the first ventilation pipe (6) and the first end of the second ventilation pipe (7) are both provided with a first clamping joint (9), an outer periphery of the first clamping joint (9) is sleeved with a first sealing ring (10), and the first clamping joint (9) is clamped and sealed to the top of the flywheel housing (3) by means of the first sealing ring (10).

3. A transmission breather system as in claim 1, wherein, The second end of the first ventilation pipe (6) is provided with a second clamping joint (11), an outer periphery of the second clamping joint (11) is sleeved with a second sealing ring (12), and the second clamping joint (11) is clamped and sealed to the top of the motor housing (2) by means of the second sealing ring (12).

4. A transmission breather system as in claim 1, wherein, A lower end surface of the ventilation pipe cap (8) is provided with a plug joint (13) in a middle portion, the plug joint (13) is interference-plugged to the second end of the second ventilation pipe (7), and an outer periphery of the lower end surface of the ventilation pipe cap (8) is provided with a downwardly bent flange (14), and the flange (14) is circumferentially arranged around the second end of the second ventilation pipe (7).

5. A transmission breather system as in claim 1, wherein, A first recess is arranged on an upper portion of an end surface of a side of the transmission housing (1) close to the motor housing (2), a second recess is arranged on an upper portion of an end surface of a side of the motor housing (2) close to the transmission housing (1), and the first recess and the second recess are oppositely combined to form the first chamber (4).

6. A transmission breather system as claimed in claim 5, wherein, A plurality of oil blocking ribs (5) are arranged in the first chamber (4) in an alternating manner.

7. A transmission breather system as in claim 1, wherein, A cooling gap (15) is arranged between the first end of the first ventilation pipe (6) and the first end of the second ventilation pipe (7).

8. A transmission breather system as claimed in any one of claims 1 to 7, wherein, An engine (20) is connected to one end of the flywheel housing (3) away from the motor housing (2), and a sealing pad layer (16) is arranged between the engine (20) and the motor housing (2).

9. A transmission breather system as claimed in claim 8, wherein, The sealing pad layer (16) is made of paper or composite rubber.

10. A vehicle characterized by comprising: The transmission ventilation system comprises the transmission ventilation system according to any one of claims 1-9.

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