Vent hole oil blocking structure, transmission and vehicle

Abstract

The utility model provides a vent hole oil blocking structure, a transmission and a vehicle, and belongs to the technical field of transmission cases, and the vent hole oil blocking structure comprises a structure body configured to be capable of adsorbing scrap iron. The structure body comprises an insertion part inserted in a vent hole of a transmission shell and a ventilation channel arranged on the insertion part, the insertion part is used for preventing oil from entering the vent hole, and the ventilation channel is used for communicating the vent hole with a vent groove of the transmission shell. According to the vent hole oil blocking structure, on the premise that air pressure in a transmission is kept balanced, the structure body can directly form physical blocking on oil liquid, the oil liquid thrown out of a gear pair is prevented from entering the vent hole, and the problem that the oil liquid overflows from the vent hole can be effectively solved. Due to the fact that the structure body has the function of adsorbing the scrap iron, the scrap iron generated by operation of the gear pair and flowing along with oil can be adsorbed to the structure body, circulation of the scrap iron in the transmission is avoided, and abrasion of the scrap iron to components such as the gear pair can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of transmission boxes, in particular to an oil retaining structure of an air vent. The utility model also relates to a transmission provided with the oil retaining structure of the air vent, and a vehicle provided with the transmission. Background Art

[0002] During vehicle operation, oil throwing occurs when the transmission gear pair rotates. If the oil throwing location happens to be at the vent, the oil will overflow along the vent pipe, which can easily cause customer dissatisfaction and complaints. As far as the current actual situation is concerned, although oil baffles are provided inside the transmission to block the oil, the effect is not ideal. In particular, for the cast iron transmission housing, due to its own characteristics, it is difficult to implement a complex oil baffle casting process, making the internal structure of the housing relatively simple and lacking an effective oil baffle structure design. Although attempts have been made to set oil baffles inside the transmission to block the oil, for the cast iron housing, the oil is still easy to overflow from the vent plug, making it difficult to fundamentally solve the problem.

[0003] At the same time, the operation of the gear pair will also generate iron chips. These iron chips circulate in the transmission along with the oil, which will have a serious impact on the service life of the bearings and gear pairs, causing abnormal wear and tear, and then generate noise, which will ultimately greatly reduce the overall life of the transmission. Utility Model Content

[0004] In view of this, the present invention aims to provide an oil-blocking structure for an air vent, which can effectively prevent oil from overflowing through the air vent and can absorb iron filings, thereby purifying the oil.

[0005] In order to achieve the above-mentioned purpose, the technical solution of the utility model is achieved as follows:

[0006] A vent oil retaining structure includes a structure body, wherein the structure body is configured to absorb iron chips;

[0007] The structural body includes an insertion portion inserted into the vent hole of the transmission housing, and an air duct provided on the insertion portion, wherein the insertion portion is used to block oil from entering the vent hole, and the air duct is used to connect the vent hole with the vent groove of the transmission housing.

[0008] Furthermore, the structural body also includes a magnet provided on the insertion portion.

[0009] Furthermore, an operating groove is provided at one end of the insertion portion close to the interior of the transmission housing, and the operating groove is used for inserting an external tool, and the insertion portion is inserted into the vent hole;

[0010] The magnet is arranged in the operating slot.

[0011] Furthermore, the inserting portion is provided with an external thread, and the inserting portion is screwed into the vent hole via the external thread; and / or,

[0012] The inserting portion is provided with a sealing groove, the sealing groove is used for installing a sealing member, and the sealing member is used for sealing a gap between the inserting portion and the transmission housing.

[0013] Furthermore, the airway includes a first airway and a second airway that are connected;

[0014] The first air passage extends along the axial direction of the vent hole and communicates with the vent hole, and the second air passage extends along the radial direction of the vent hole and communicates with the vent groove.

[0015] Furthermore, the structural body further includes a flange portion extending radially along the insertion portion;

[0016] The vent groove extends radially toward the bottom of the transmission housing along the vent hole, and the flange portion is at least partially blocked on one side of the vent groove.

[0017] Furthermore, a groove is provided on a side of the flange portion facing the interior of the transmission housing.

[0018] Further, the groove includes a plurality of first grooves extending along the radial direction of the insertion portion; and / or,

[0019] The groove includes a plurality of second grooves arranged along a circumference of the insertion portion.

[0020] Compared with the prior art, the present invention has the following advantages:

[0021] The vent oil-blocking structure described in the utility model, by providing a structural body capable of absorbing iron chips, and making the structural body have an insertion portion inserted in the vent, and an air passage connecting the vent and the air groove, can maintain the internal air pressure balance of the transmission, so that the structural body directly forms a physical barrier to the oil, preventing the oil thrown out by the gear pair from entering the vent, and can effectively solve the problem of oil overflowing from the vent; at the same time, during the operation of the transmission, the iron chips generated by the operation of the gear pair and flowing with the oil can be adsorbed on the structural body, avoiding the iron chips from circulating inside the transmission, thereby reducing the wear of the gear pair and other components by the iron chips.

[0022] Furthermore, by placing a magnet on the insert, the rest of the structural body, when stimulated by the magnet, can attract iron filings from the oil thrown by the gear pair over a wider area, reducing manufacturing costs compared to structures made entirely of magnets. Providing an operating slot on the insert allows for the insertion of external tools, simplifying the installation and subsequent removal of the insert in the vent, reducing assembly difficulty and maintenance costs. Placing the magnet in the operating slot not only enhances its secure placement but also fully utilizes the slot's space, avoiding issues such as interference with other components that could result from the haphazard placement of the magnet.

[0023] Secondly, by providing an external thread on the insert portion and threading it into the vent hole, a tighter seal is formed between the vent hole and the insert portion compared to other connection methods, greatly reducing the possibility of oil bypassing the insert portion and entering the vent hole, effectively solving the problem of oil overflow; at the same time, it also facilitates the assembly and disassembly of the insert portion. Providing a sealing groove on the insert portion provides an installation location for the seal. Once the seal is installed in the sealing groove, when the insert portion is inserted into the transmission case vent hole, the seal is squeezed between the insert portion and the vent hole wall, allowing the seal's elastic deformation to fill the small gap between the two, further preventing oil from overflowing the vent hole.

[0024] By making the air duct include a first air duct extending along the axial direction of the air hole and a second air duct extending along the radial direction of the air hole, not only is it ensured that the gas can be transmitted and the balanced regulation of the air pressure inside the transmission is ensured, but also, even if some oil enters the air groove, it will be difficult to enter the first air duct smoothly due to the turning point between the first air duct and the second air duct, thereby further improving the oil blocking effect.

[0025] By providing a flange portion extending radially along the insertion portion and making the flange portion at least block one side of a portion of the ventilation groove, the lateral shielding effect of the flange portion can be utilized to prevent the oil from directly entering the ventilation groove in the process of rushing towards the ventilation groove, further reducing the possibility of oil overflowing from the ventilation hole; moreover, it can also increase the adsorption area of iron chips and improve the purification effect of the oil.

[0026] In addition, by providing a groove on the side of the flange facing the interior of the transmission housing, not only is the adsorption area for oil and iron chips further increased, but the iron chips can also be stored and collected, and they will not be unable to be adsorbed due to being too smooth. As a result, when the oil flows into the groove, some of the iron chips carried in it can easily settle in the groove, which helps to reduce the circulation of impurities such as iron chips inside the transmission and reduce wear and corrosion on internal parts of the transmission.

[0027] The first groove is extended radially so that the flange part can effectively settle the iron chips in the oil when facing the impact of oil from different radial angles; and the several second grooves arranged along the circumference of the insertion part can effectively settle the iron chips in the oil when the oil flows or splashes in the circumferential direction, thereby improving the purification ability of the oil.

[0028] Another object of the present invention is to provide a transmission, wherein the transmission housing is provided with the above-mentioned vent hole oil retaining structure.

[0029] The transmission described in the utility model, by providing the above-mentioned vent oil retaining structure on the housing, not only effectively prevents oil from overflowing through the vent, but also can absorb iron chips in the oil thrown off the gear pair to prevent the iron chips from wearing the gear pair.

[0030] In addition, the present invention also relates to a vehicle, which is provided with the transmission as described above.

[0031] All the beneficial effects of the vehicle and the above-mentioned transmission described in the present invention are not repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The accompanying drawings, which constitute part of the present invention, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0033] Figure 1 This is a schematic diagram of the vent oil retaining structure according to an embodiment of the present utility model;

[0034] Figure 2 This is a structural schematic diagram of the vent oil retaining structure according to an embodiment of the present utility model from another perspective;

[0035] Figure 3 This is a structural schematic diagram of the vent oil retaining structure according to an embodiment of the present utility model when the magnet is removed;

[0036] Figure 4 for Figure 3 Cross-sectional view along line AA;

[0037] Figure 5 This is a partial structural diagram of a transmission according to an embodiment of the present utility model;

[0038] Figure 6 for Figure 5 a schematic diagram of the structure shown at another viewing angle;

[0039] Figure 7 for Figure 6 Cross-sectional view along the midline BB;

[0040] Figure 8 for Figure 7 Enlarged view of part C;

[0041] Figure 9 This is a schematic structural diagram of a transmission housing according to an embodiment of the present utility model;

[0042] Figure 10 This is a schematic structural diagram of the ventilation pipe described in an embodiment of the present utility model.

[0043] Description of reference numerals:

[0044] 1. Structural body; 2. Transmission housing; 3. Gear pair; 4. Breather pipe;

[0045] 101, insert portion; 1011, first air channel; 1012, second air channel; 1013, sealing groove; 1014, operating groove; 102, flange portion; 1021, first groove; 1022, second groove; 103, magnet;

[0046] 201. Ventilation hole; 202. Ventilation groove. DETAILED DESCRIPTION

[0047] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features therein can be combined with each other.

[0048] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0049] Furthermore, in the description of this utility model, unless otherwise explicitly defined, the terms "mounted," "connected," "connect," and "connector" should be interpreted broadly. For example, they can refer to fixed, removable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on specific circumstances.

[0050] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0051] Example 1

[0052] Given the following problems in the prior art: first, although oil retaining ribs are provided inside the transmission to block oil, the effect is not ideal, especially for the cast iron transmission housing 2, which is difficult to implement a complex oil retaining rib casting process; second, iron chips generated by the operation of the gear pair 3 easily wear the gear pair 3. To this end, this embodiment specifically proposes a novel vent hole oil retaining structure, including a structural body 1, which is configured to absorb iron chips.

[0053] Among them, the structural body 1 includes an insertion part 101 inserted into the vent hole 201 of the transmission housing 2, and an air duct provided on the insertion part 101. The insertion part 101 is used to block the oil from entering the vent hole 201, and the air duct is used to connect the vent hole 201 with the vent groove 202 of the transmission housing 2.

[0054] The vent oil-blocking structure of this embodiment, by providing a structural body 1 capable of absorbing iron chips, and providing the structural body 1 with an insert portion 101 inserted into the vent 201, and an air passage connecting the vent 201 and the vent groove 202, can, under the premise of maintaining the air pressure balance inside the transmission, enable the structural body 1 to directly form a physical barrier to the oil, preventing the oil thrown out of the gear pair 3 from entering the vent 201, and effectively solving the problem of oil overflowing from the vent 201. At the same time, because the structural body 1 has the function of absorbing iron chips, the iron chips generated by the operation of the gear pair 3 and flowing with the oil can be absorbed on the structural body 1 during the operation of the transmission, preventing the iron chips from circulating inside the transmission, thereby reducing the wear of the iron chips on the gear pair 3 and other components.

[0055] Based on the above overall introduction, an exemplary structure of the vent oil retaining structure of this embodiment is referred to Figures 1 to 4 As shown in, and, in order to facilitate the description of its structure, the following is also combined Figures 5 to 8 The assembly state of the vent oil retaining structure on the transmission is described in the following. Figure 5 and Figure 9 As shown in the figure, the structure of the transmission housing 2 is briefly introduced. The transmission housing 2 has an accommodating cavity for accommodating the gear pair 3, a vent hole 201 is provided through one side wall thereof, and a vent groove 202 is provided on the side of the side wall facing the accommodating cavity.

[0056] And, as Figure 9As shown in , preferably, the vent groove 202 extends radially toward the bottom of the transmission housing 2 along the vent hole 201, that is, the vent groove 202 and the vent hole 201 are arranged in an L shape. Since the oil in the accommodating cavity is mainly affected by gravity and accumulates in the bottom area under normal conditions, the vent groove 202 extends toward the bottom, so that even if there is a certain fluctuation when the oil tries to enter the vent groove 202, it needs to overcome gravity and flow upward. This design can greatly increase the difficulty of the oil entering the vent groove 202 and flowing back along the air passage into the vent hole 201 and then overflowing. It can not only ensure that the vent groove 202 is mainly used for ventilation and reduce the interference of the oil on the ventilation function, but also effectively prevent oil overflow.

[0057] In addition, if Figure 5 As shown in FIG, in order to effectively prevent external impurities from entering the vent hole 201, a vent pipe 4 is provided at one end of the vent hole 201 away from the accommodating cavity. The vent pipe 4 is roughly "J" shaped, one end of which is inserted into the vent hole 201, and a protrusion is provided on the vent hole 201 to limit its insertion depth. Of course, the structure of the vent pipe 4 is not limited to Figure 9 As shown in , it can also adopt other existing structures. Generally, the vent pipe 4 is assembled from the outside after the transmission assembly is installed, and is matched by thread glue to prevent oil and gas from overflowing from the thread, and can have the functions of ventilation, dustproof and preventing water from entering the transmission.

[0058] Combine Figures 1 to 4 As shown in FIG, the inserting portion 101 of the structural body 1 of this embodiment is generally cylindrical and fits into the vent hole 201. Figure 4 and Figure 8 As shown in , as a preferred embodiment, the air passage of this embodiment includes a first air passage 1011 and a second air passage 1012. The first air passage 1011 extends axially along the air hole 201 and communicates with the air hole 201, and the second air passage 1012 extends radially along the air hole 201 and communicates with the ventilation groove 202.

[0059] This arrangement not only ensures that gas can be transmitted and maintains balanced pressure within the transmission, but also prevents some oil from entering the vent groove 202 due to the transition between the first and second air passages 1011, thereby further enhancing the oil-blocking effect. Furthermore, as a preferred embodiment, the flow area of the second air passage 1012 is smaller than that of the first air passage 1011, facilitating gas exhaust and effectively preventing oil overflow.

[0060] Furthermore, as a preferred embodiment, to facilitate installation of the structural body 1 on the transmission housing 2, the insert portion 101 is provided with external threads, which are screwed into the vent hole 201 via the external threads. Compared to other connection methods, this external threaded connection creates a tighter seal between the vent hole 201 and the insert portion 101, significantly reducing the possibility of oil bypassing the insert portion 101 and entering the vent hole 201, effectively addressing oil spillage. Furthermore, installation is relatively simple, requiring only the insert portion 101 to be screwed into the vent hole 201.

[0061] In addition, if Figure 1 and Figure 4 As shown in FIG, a sealing groove 1013 is provided on the insert portion 101 for mounting a seal, which is used to seal the gap between the insert portion 101 and the transmission housing 2. The provision of the sealing groove 1013 provides a mounting location for the seal. Once the seal is installed in the sealing groove 1013, when the insert portion 101 is inserted into the vent hole 201 of the transmission housing 2, the seal is squeezed between the insert portion 101 and the wall of the vent hole 201. The seal's elastic deformation fills the tiny gap between the two, thus forming a barrier that prevents oil from passing through.

[0062] It should be noted that, in addition to inserting the insert portion 101 into the vent hole 201 via external threads, it can also be press-fitted into the vent hole 201. Furthermore, in addition to providing the sealing groove 1013 for mounting the seal, it is also possible to omit the sealing groove 1013 and place the seal directly between the insert portion 101 and the vent hole 201. In this case, the stability of the seal will obviously be reduced.

[0063] To enable structural body 1 to absorb iron filings, as a preferred embodiment, structural body 1 further includes magnets 103 disposed on insert portion 101, which is made of metal, such as steel. The presence of magnets 103 allows other parts of structural body 1, when energized by magnets 103, to attract iron filings from the oil thrown by gear pair 3 over a wider area. This reduces manufacturing costs compared to a structure where magnets 103 are used throughout the structural body 1.

[0064] Based on this setting, as a preferred embodiment, Figure 4 As shown in FIG, an operation slot 1014 is provided at one end of the insert portion 101 close to the interior of the transmission housing 2. The operation slot 1014 is used for inserting an external tool. The insert portion 101 is inserted into the vent hole 201, and the magnet 103 is disposed in the operation slot 1014. Figure 4As shown in FIG, the operating slot 1014 of this embodiment is hexagonal, and the magnet 103 is adapted to be arranged in the operating slot 1014.

[0065] Among them, the setting of the operating groove 1014 can provide a convenient fulcrum for the installation of the insertion part 101, thereby, the operating groove 1014 can be inserted through an external tool, which is beneficial to the installation of the insertion part 101, and can help ensure that its installation position is accurate, thereby ensuring its oil blocking effect. And the magnet 103 is set in the operating groove 1014. On the one hand, the space of the operating groove 1014 can be used to reasonably place the magnet 103, so that it can be in the path of the oil flow without taking up too much extra space, so as to effectively absorb iron filings. Moreover, it can also improve the placement stability of the magnet 103 and prevent it from falling. On the other hand, the operating groove 1014 can play a certain protective role for the magnet 103, reducing the possibility of it being affected by collisions or other interference factors during the operation of the transmission.

[0066] It is understandable that, in addition to providing the operating groove 1014 and placing the magnet 103 in the operating groove 1014 , the operating groove 1014 may not be provided, and the magnet 103 may be directly adsorbed on the inserting portion 101 .

[0067] As a further embodiment, the structural body 1 also includes a flange portion 102 extending radially along the insertion portion 101, and the flange portion 102 is at least partially blocked on one side of the vent groove 202. By providing the flange portion 102, when the oil splashes or fluctuates inside the transmission due to reasons such as the rotation of the gear pair 3, the flange portion 102 can form an additional blocking barrier. At this time, the lateral shielding effect of the flange portion 102 can be utilized to prevent the oil from directly entering the vent groove 202 in the process of rushing towards the vent groove 202, further reducing the possibility of the oil overflowing from the vent groove 202. At the same time, due to the relative positional relationship between the flange portion 102 and the vent groove 202, the oil can be effectively intercepted without affecting the normal ventilation function of the vent.

[0068] Furthermore, the flange portion 102 can also increase the area of the structural body 1 for adsorbing iron chips, thereby improving the oil purification effect. Simultaneously, the flange portion 102 can also increase the contact area with the transmission housing 2, and due to the friction between the two, it is not easy to loosen during vehicle operation.

[0069] Among them, combined Figures 1 to 4As shown in , as a preferred embodiment, the flange portion 102 of this embodiment is in the shape of a circular ring arranged along the circumference of the insert portion 101, and is integrally formed with the insert portion 101 and attached to the inner wall of the transmission housing 2. Moreover, the flange portion 102 can block most areas of the vent groove 202, while forming an air outlet in the unblocked area. At this time, the gas in the accommodating cavity is mainly discharged through the air outlet, and the size of the air outlet affects the probability of oil entering, that is, reducing the air outlet can reduce the probability of oil overflow. In addition, preferably, the position of the air outlet is lower than the gear pair 3, so that the oil thrown out by the gear pair 3 during operation will not be directly thrown at the air outlet, which can further prevent oil overflow.

[0070] It should be noted that, in addition to integrally forming the flange portion 102 and the insert portion 101, the insert portion 101 and the flange portion 102 can also be manufactured separately and then welded together. Furthermore, in addition to having the flange portion 102 only partially obstruct the vent groove 202, the flange portion 102 can also completely obstruct the vent groove 202. In this case, to achieve ventilation, a gap can be created between the flange portion 102 and the inner wall bracket of the transmission housing 2 to create a ventilation space between the two.

[0071] In this embodiment, as a further implementation, a groove is provided on the side of the flange portion 102 facing the interior of the transmission housing 2. The provision of this groove not only further increases the adsorption area for oil and iron chips, but also allows for the storage and collection of iron chips, eliminating the problem of the oil being too smooth to be adsorbed. As the oil flows into the groove, some of the iron chips carried by the oil easily settle in the groove, helping to reduce the circulation of impurities such as iron chips within the transmission, thereby reducing wear and corrosion on internal transmission components.

[0072] As a preferred embodiment, the groove includes a plurality of first grooves 1021 extending along the radial direction of the inserting portion 101. Figure 2 As shown in FIG, twelve first grooves 1021 are spaced apart circumferentially along the insert portion 101. The number of first grooves 1021 can be adjusted based on design requirements. By providing multiple first grooves 1021, the flange portion 102 can effectively precipitate iron filings in the oil when impacted by oil from various radial angles, thereby improving the oil purification effect.

[0073] In addition, the groove further includes a plurality of second grooves 1022 arranged along the circumference of the inserting portion 101. Figure 2As shown in FIG, two second grooves 1022 are spaced apart along the circumference of the insert portion 101, and each second groove 1022 connects multiple first grooves 1021. Of course, in a specific implementation, the number of second grooves 1022 can be adjusted accordingly based on design requirements. In this embodiment, the second grooves 1022 arranged along the circumference of the insert portion 101 effectively settle iron filings in the oil when the oil flows or splashes in the circumferential direction, thereby improving the oil purification capability.

[0074] In addition, it should be noted that in addition to providing both the first groove 1021 and the second groove 1022 , only the first groove 1021 or only the second groove 1022 may be provided.

[0075] Based on the above overall description, the vent oil blocking structure of this embodiment can effectively block the oil thrown out by the gear pair 3 by adopting the above structure, and can prevent the oil from overflowing. The setting of the first groove 1021 and the second groove 1022 facilitates the adsorption and interception of iron filings, and can fully purify the oil. The magnet 103 can stimulate other parts of the structural body 1 to generate magnetism, increase the adsorption area, further block the oil, and improve the adsorption effect of iron filings. The flange adsorbs the iron filings in the oil thrown out by the gear pair 3 to prevent the iron filings from wearing the gear pair 3.

[0076] Example 2

[0077] This embodiment relates to a transmission, and the housing of the transmission is provided with the vent oil retaining structure of the first embodiment.

[0078] The transmission of this embodiment, by providing the above-mentioned vent oil retaining structure on the housing, not only effectively prevents the oil from overflowing through the vent 201, but also can absorb the iron chips in the oil thrown out of the gear pair 3 to prevent the iron chips from wearing the gear pair 3.

[0079] In addition, this embodiment also relates to a vehicle, which is provided with the above transmission.

[0080] All the beneficial effects of the vehicle of this embodiment and the above-mentioned transmission are not repeated here.

[0081] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A vent oil retaining structure, characterized by: The invention comprises a structural body (1), wherein the structural body (1) is configured to be able to absorb iron filings; The structural body (1) comprises an inserting portion (101) inserted into a vent hole (201) of a transmission housing (2), and an air duct provided on the inserting portion (101), wherein the inserting portion (101) is used to prevent oil from entering the vent hole (201), and the air duct is used to connect the vent hole (201) with a vent groove (202) of the transmission housing (2).

2. The vent oil retaining structure according to claim 1, characterized in that: The structural body (1) further comprises a magnet (103) arranged on the insertion portion (101).

3. The vent hole oil retaining structure according to claim 2, characterized in that: An operating groove (1014) is provided at one end of the insertion portion (101) close to the interior of the transmission housing (2), and the operating groove (1014) is used for inserting an external tool, and the insertion portion (101) is inserted into the vent hole (201); The magnet (103) is disposed in the operating slot (1014).

4. The vent hole oil retaining structure according to claim 1, characterized in that: The insert portion (101) is provided with an external thread, and the insert portion (101) is screwed into the vent hole (201) via the external thread; and / or, The inserting portion (101) is provided with a sealing groove (1013), the sealing groove (1013) is used for installing a sealing member, and the sealing member is used for sealing the gap between the inserting portion (101) and the transmission housing (2).

5. The vent oil retaining structure according to claim 1, characterized in that: The airway comprises a first airway (1011) and a second airway (1012) that are connected; The first air channel (1011) extends along the axial direction of the vent hole (201) and is in communication with the vent hole (201), and the second air channel (1012) extends along the radial direction of the vent hole (201) and is in communication with the vent groove (202).

6. The vent hole oil retaining structure according to any one of claims 1 to 5, characterized in that: The structural body (1) further includes a flange portion (102) extending radially of the insertion portion (101); The vent groove (202) extends radially toward the bottom of the transmission housing (2) along the vent hole (201), and the flange portion (102) is at least partially blocked on one side of the vent groove (202).

7. The vent hole oil retaining structure according to claim 6, characterized in that: A groove is provided on the side of the flange portion (102) facing the interior of the transmission housing (2).

8. The vent hole oil retaining structure according to claim 7, characterized in that: The groove includes a plurality of first grooves (1021) extending in a radial direction of the insertion portion (101); and / or, The grooves include a plurality of second grooves (1022) arranged along the circumference of the insertion portion (101).

9. A transmission, characterized in that: The transmission housing is provided with the vent oil retaining structure according to any one of claims 1 to 8.

10. A vehicle, characterized in that: The vehicle is provided with the transmission according to claim 9.

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