CN219176911U - Transmission, drive assembly and vehicle - Google Patents

Abstract

The utility model discloses a transmission, a driving assembly and a vehicle, wherein the transmission comprises a transmission shell, the transmission shell comprises a first shell and a second shell which are connected, the first shell and the second shell jointly enclose an inner cavity and jointly define a ventilation structure, the ventilation structure is communicated with the inner cavity and the outside and comprises a ventilation hole, a plurality of communication holes and a plurality of ventilation cavities which are sequentially distributed, the ventilation cavities are sequentially from a first ventilation cavity to an Mth ventilation cavity, two adjacent ventilation cavities are communicated through the communication holes, the first ventilation cavity is communicated with the inner cavity through the communication holes, a ventilation hole is formed on the radial outer side wall of the Mth ventilation cavity, and the ventilation hole is communicated with the Mth ventilation cavity and the outside; wherein a part of the communication holes is formed in the first housing and another part of the communication holes is formed in the second housing. According to the transmission provided by the embodiment of the utility model, the circulation path of the high-temperature oil gas in the ventilation structure is longer, and the cooling effect of the high-temperature oil gas is better, so that the separation effect of the high-temperature oil gas is better.

Description

Transmission, drive assembly and vehicle

Technical Field

The utility model relates to the field of transmissions, in particular to a transmission, a driving assembly and a vehicle.

Background

In a vehicle transmission system, the temperature of lubricating oil in a transmission shell is increased during the operation of parts to form oil gas, and the oil gas needs to be discharged out of a box body in time, otherwise, oil leakage of a sealing element is caused by over high internal pressure. Accordingly, venting structures are required on the transmission housing to ensure that the internal transmission housing pressure remains consistent with atmospheric pressure during operation of the transmission system. The ventilation structure in the related art has poor separation effect on high-temperature oil and gas and high loss of lubricating oil.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, an object of the present utility model is to provide a transmission, in which a part of communication holes are formed in a first housing and another part of communication holes are formed in a second housing, so that a circulation path of high-temperature oil gas in a ventilation structure is longer, a cooling effect of the ventilation structure on the high-temperature oil gas is better, an overall separation effect of the high-temperature oil gas is better, and a loss of lubricating oil is further reduced.

The utility model further provides a driving assembly with the transmission.

The utility model further provides a vehicle with the driving assembly.

According to the embodiment of the first aspect of the utility model, the transmission comprises a transmission shell, the transmission shell comprises a first shell and a second shell which are connected, the first shell and the second shell are all independent forming parts, an inner cavity is jointly enclosed by the first shell and the second shell and a ventilation structure is jointly defined, the ventilation structure is communicated with the inner cavity and the outside, the ventilation structure comprises a ventilation hole, a plurality of communication holes and a plurality of ventilation cavities which are sequentially distributed, the ventilation cavities are sequentially from a first ventilation cavity to an Mth ventilation cavity, two adjacent ventilation cavities are communicated through the communication holes, the first ventilation cavity is communicated with the inner cavity through the communication holes, and the radial outer side wall of the Mth ventilation cavity is provided with the ventilation holes which are communicated with the Mth ventilation cavity and the outside; wherein a part of the communication hole is formed in the first housing and another part of the communication hole is formed in the second housing.

According to the transmission provided by the embodiment of the utility model, the circulation path of the high-temperature oil gas in the ventilation structure is longer by forming one part of the communication holes in the first shell and the other part of the communication holes in the second shell, so that the cooling effect of the ventilation structure on the high-temperature oil gas is better, the overall separation effect of the high-temperature oil gas is better, and the loss of lubricating oil is further reduced.

According to some embodiments of the utility model, one of the adjacent two communication holes is formed in the first housing, and the other of the adjacent two communication holes is formed in the second housing.

According to some embodiments of the utility model, the ventilation cavities are three.

According to some embodiments of the present utility model, the transmission case includes a plurality of rib plates arranged at intervals in sequence, two adjacent ventilation cavities are separated by the rib plate, the first ventilation cavity is separated from the inner cavity by the rib plate, the rib plates between the two adjacent ventilation cavities form the communication holes, and the rib plates between the first ventilation cavity and the inner cavity form the communication holes; each rib plate comprises a first plate body formed on the first shell and a second plate body formed on the second shell, wherein a part of communication holes are formed on the first plate body, and the other part of communication holes are formed on the second plate body.

According to some embodiments of the utility model, one of the adjacent two communication holes is formed in the first plate body, and the other of the adjacent two communication holes is formed in the second plate body.

According to some embodiments of the utility model, the communication holes are located at or adjacent to the bottom of the gusset.

According to some embodiments of the utility model, at least part of the adjacent two rib plates are arranged at an acute angle, and the distance between the adjacent two rib plates arranged at the acute angle gradually increases in the direction from inside to outside.

According to some optional embodiments of the present utility model, a plurality of first grooves are formed on an end face of the first housing facing the second housing, a plurality of second grooves are formed on an end face of the second housing facing the first housing, the number of the second grooves is the same as that of the first grooves, the second grooves are in one-to-one correspondence with the first grooves, and the first grooves and the corresponding second grooves jointly form the ventilation cavity.

A drive assembly according to an embodiment of the second aspect of the present utility model includes: a transmission according to an embodiment of the above first aspect of the present utility model.

According to the driving assembly provided by the embodiment of the utility model, through arranging the transmission, a part of communication holes are formed in the first shell, and the other part of communication holes are formed in the second shell, so that the circulation path of high-temperature oil gas in the ventilation structure is longer, the cooling effect of the ventilation structure on the high-temperature oil gas is better, the overall separation effect of the high-temperature oil gas is better, and the loss of lubricating oil is further reduced.

According to an embodiment of the third aspect of the present utility model, a vehicle includes: a drive assembly according to an embodiment of the above second aspect of the present utility model.

According to the vehicle provided by the embodiment of the utility model, through the arrangement of the driving assembly, a part of communication holes are formed in the first shell, and the other part of communication holes are formed in the second shell, so that the circulation path of high-temperature oil gas in the ventilation structure is longer, the cooling effect of the ventilation structure on the high-temperature oil gas is better, the overall separation effect of the ventilation structure on the high-temperature oil gas is better, and the loss of lubricating oil is further reduced.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

FIG. 1 is a partial schematic view of a first housing according to some embodiments of the utility model;

FIG. 2 is a partial schematic view of a second housing according to some embodiments of the utility model;

FIG. 3 is a partial cross-sectional view of a transmission housing according to some embodiments of the utility model.

Reference numerals:

10. a transmission housing; 1. a first housing; 11. a first groove; 2. rib plates; 21. a communication hole; 22. a first plate body; 23. a second plate body; 3. a ventilation chamber; 31. a first venting chamber; 32. a second venting chamber; 33. a third vent lumen; 4. a vent hole; 5. a second housing; 51. a second groove;

20. an inner cavity.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

A transmission according to an embodiment of the present utility model is described below with reference to fig. 1 to 3.

As shown in fig. 1 to 3, according to the transmission of the embodiment of the first aspect of the present utility model, the transmission includes the transmission case 10, the transmission case 10 includes the first casing 1 and the second casing 5 connected to each other, and the first casing 1 and the second casing 5 are each an independent molded member, so that the assembly of the transmission case 10 can be facilitated, and the overall strength and rigidity can be improved. The first shell 1 and the second shell 5 jointly enclose the inner cavity 20 and jointly define a ventilation structure, the ventilation structure is communicated with the inner cavity 20 and the outside, when the pressure of the inner cavity 20 of the transmission shell 10 is overlarge, the ventilation structure can be used for communicating the inner cavity 20 of the transmission shell 10 with the outside, so that the pressure of the inner cavity 20 of the transmission shell 10 is consistent with the atmospheric pressure, and the phenomenon of oil leakage of a sealing element due to overlarge pressure of the inner cavity 20 of the transmission shell 10 is prevented.

The ventilation structure includes a ventilation hole 4, a plurality of communication holes 21, and a plurality of ventilation chambers 3 arranged in sequence.

As shown in the embodiment of fig. 1 to 3, a plurality of ventilation chambers 3 may be disposed at intervals along the circumferential direction of the transmission case 10, which may make the overall structure more compact and space-utilization efficient. In other embodiments, the plurality of ventilation chambers 3 may also be disposed at intervals in an obliquely upward or vertically upward direction, so that high-temperature and high-pressure oil gas flows under the action of lifting force in the ventilation structure.

The plurality of ventilation cavities 3 are the first ventilation cavity 3 to the Mth ventilation cavity 3 in sequence, two adjacent ventilation cavities 3 are communicated through the communication hole 21, the first ventilation cavity 31 is communicated with the inner cavity 20 through the communication hole 21, the communication hole 21 can be used for communicating the two adjacent ventilation cavities 3 and the first ventilation cavity 31 with the inner cavity 20 of the transmission shell 10, so that high-temperature and high-pressure oil gas can circulate in the plurality of ventilation cavities 3, cooling and depressurization of the high-temperature and high-pressure oil gas are realized, and the separation of the high-temperature and high-pressure oil gas is facilitated. And, the lubricating oil separated from the high-temperature and high-pressure oil gas can flow back to the inner cavity 20 of the transmission case 10 through the communication hole 21, thereby reducing the loss of the lubricating oil, reducing the leakage of the lubricating oil from the vent hole 4, and avoiding or reducing the failure risk of the transmission due to the lack of the lubricating oil.

The radial outer side wall of the Mth ventilation cavity 3 is formed with a ventilation hole 4, and the ventilation hole 4 communicates the Mth ventilation cavity 3 with the outside. The vent 4 can exhaust the gas separated from the high-temperature oil gas to the outside, so that the pressure of the inner cavity 20 of the transmission case 10 is kept consistent with the atmospheric pressure, and the phenomenon of oil leakage of a sealing member due to overlarge pressure of the inner cavity 20 of the transmission case 10 is prevented. The vent hole 4 may be formed in the first housing 1, or the vent hole 4 may be formed in the second housing 5.

When the pressure in the transmission case 10 is too high, the high-temperature and high-pressure oil gas in the inner cavity 20 of the transmission case 10 can enter the first ventilation cavity 31 through the communication hole 21 to realize preliminary cooling and depressurization, so that preliminary oil-gas separation is realized, after preliminary precipitation is realized in the first ventilation cavity 31, the high-temperature and high-pressure oil gas can sequentially flow through the ventilation cavities 3 through the communication hole 21 to realize further cooling and depressurization, so that a better oil-gas separation effect is realized, and finally, the gas separated in the Mth ventilation cavity 3 can be discharged out of the transmission case 10 through the ventilation holes 4, so that timely discharge of the high-temperature oil gas in the inner cavity 20 of the transmission case 10 is ensured, the pressure in the transmission case 10 is basically consistent with the atmospheric pressure, and the phenomenon of oil leakage of a sealing element is effectively avoided. While the lower-temperature lubricating oil separated in each breather chamber 3 can flow back to the inner chamber 20 of the transmission case 10 through the communication hole 21, thereby reducing the loss of lubricating oil.

Wherein a part of the communication hole 21 is formed in the first housing 1 and another part of the communication hole 21 is formed in the second housing 5. Like this set up, when high temperature oil gas flows in ventilation structure, high temperature oil gas can flow in first casing 1 and second casing 5 to can make the circulation route of high temperature oil gas in ventilation structure longer, make ventilation structure better to the cooling effect of high temperature oil gas, thereby make whole better to the separation effect of high temperature oil gas, further reduce the loss of lubricating oil.

According to the transmission case 10 of the embodiment of the utility model, by forming a part of the communication holes 21 in the first casing 1 and another part of the communication holes 21 in the second casing 5, the circulation path of the high-temperature oil gas in the ventilation structure can be longer, the cooling effect of the ventilation structure on the high-temperature oil gas is better, the separation effect of the whole high-temperature oil gas is better, and the loss of lubricating oil is further reduced.

According to some embodiments of the present utility model, referring to fig. 1-2, one of the adjacent two communication holes 21 is formed in the first housing 1, and the other of the adjacent two communication holes 21 is formed in the second housing 5. Like this set up, when high temperature oil gas flows in ventilation structure, high temperature oil gas can pass through the intercommunicating pore 21 of first casing 1 and the intercommunicating pore 21 of second casing 5 in proper order, can guarantee that high temperature oil gas flows in turn in first casing 1 and second casing 5 to make the circulation route of high temperature oil gas longer, thereby make ventilation structure to high temperature oil gas's cooling effect better, and then make whole to high temperature oil gas's separation effect better, further reduce the loss of lubricating oil.

According to some embodiments of the present utility model, referring to fig. 1-3, the number of ventilation chambers 3 is three, so that the ventilation structure occupies smaller space as a whole, the size of the whole transmission case 10 is ensured, and the production cost is reduced while the separation effect of the whole to high-temperature oil gas is better.

According to some embodiments of the present utility model, referring to fig. 1-2, the transmission case 10 includes a plurality of rib plates 2 sequentially spaced apart, and the plurality of rib plates 2 may be spaced apart along the circumference of the transmission case 10. The two adjacent ventilation cavities 3 are separated by the rib plate 2, the first ventilation cavity 31 is separated from the inner cavity 20 of the transmission shell 10 by the rib plate 2, the rib plate 2 can play a role in separating, the two adjacent ventilation cavities 3 can be separated, the first ventilation cavity 31 is separated from the inner cavity 20 of the transmission shell 10, and meanwhile, the rib plate 2 can further increase the integral structural strength and rigidity of the ventilation structure.

The rib plates 2 between two adjacent ventilation cavities 3 are provided with communication holes 21, and the rib plates 2 between the first ventilation cavity 3 and the inner cavity 20 are provided with communication holes 21. The communication hole 21 can be communicated with the two adjacent ventilation cavities 3 and the first ventilation cavity 31 and the inner cavity 20 of the transmission shell 10, so that high-temperature and high-pressure oil gas can circulate in the ventilation cavities 3, cooling and depressurization of the high-temperature and high-pressure oil gas are realized, and separation of the high-temperature and high-pressure oil gas is facilitated. And, the lubricating oil separated from the high-temperature and high-pressure oil gas can flow back to the inner cavity 20 of the transmission case 10 through the communication hole 21, thereby reducing the loss of the lubricating oil.

When the pressure of the inner cavity 20 of the transmission case 10 is too high, high-temperature and high-pressure oil gas in the inner cavity 20 of the transmission case 10 can enter the first ventilation cavity 31 through the communication holes 21 formed by the rib plates 2 between the first ventilation cavity 31 and the inner cavity 20 of the transmission case 10, the high-temperature and high-pressure oil gas can be initially separated from the gas in the first ventilation cavity 31, then the high-temperature and high-pressure oil gas can sequentially flow through the ventilation cavities 3 through the communication holes 21 formed by the rib plates 2 between the two adjacent ventilation cavities 3, the ventilation cavities 3 can cool and decompress the high-temperature oil gas for multiple times, the ventilation structure can cool and decompress the high-temperature and high-pressure oil gas for multiple times, and finally the gas separated from the high-temperature oil gas can be discharged from the ventilation holes 4 formed by the radial outer side walls of the Mth ventilation cavity 3. While the lower-temperature lubricating oil separated in each breather chamber 3 can flow back to the inner chamber 20 of the transmission case 10 through the communication hole 21, thereby reducing the loss of lubricating oil.

Wherein each rib plate 2 includes a first plate 22 formed at the first housing 1 and a second plate 23 formed at the second housing 5, a part of communication holes 21 being formed at the first plate 22 and another part of communication holes 21 being formed at the second plate 23. The arrangement can enable the circulation path of the high-temperature oil gas in the ventilation structure to be longer, so that the cooling effect of the ventilation structure on the high-temperature oil gas is better, the separation effect of the whole high-temperature oil gas is better, and the loss of lubricating oil is further reduced.

According to some embodiments of the present utility model, referring to fig. 1-2, one of the adjacent two communication holes 21 is formed in the first plate 22, and the other of the adjacent two communication holes 21 is formed in the second plate 23. Like this set up, when high temperature oil gas flows in ventilation structure, high temperature oil gas can be through the intercommunicating pore 21 on the first plate body 22 of first casing 1 and the intercommunicating pore 21 on the second plate body 23 of second casing 5 in proper order, can guarantee that high temperature oil gas flows in turn in first casing 1 and second casing 5 to make the circulation route of high temperature oil gas longer, thereby make ventilation structure to high temperature oil gas's cooling effect better, and then make whole to high temperature oil gas's separation effect better, further reduce the loss of lubricating oil.

According to some embodiments of the present utility model, referring to fig. 1-2, the communication holes 21 are located at or near the bottom of the gusset 2. The bottom of the rib 2 is the bottom of the rib 2 in the up-down direction when the drive assembly to which the transmission of the present embodiment is applied is mounted on a vehicle. Therefore, the communication hole 21 is positioned at or near the bottom of the rib plate 2, so that lubricating oil separated from high-temperature and high-pressure oil gas in the ventilation cavity 3 can flow back to the inner cavity 20 of the transmission shell 10 from the communication hole 21 under the action of gravity and the diversion effect of the rib plate 2, thereby realizing the recycling of the lubricating oil and reducing the loss of the lubricating oil.

According to some embodiments of the present utility model, referring to fig. 1-2, at least part of the communication holes 21 on two adjacent rib plates 2 are staggered in the circumferential direction of the transmission casing 10, for example, part of the communication holes 21 on two adjacent rib plates 2 are staggered in the circumferential direction of the transmission casing 10 or all of the communication holes 21 on two adjacent rib plates 2 are staggered in the circumferential direction of the transmission casing 10, so that the flow path of the high-temperature and high-pressure oil gas between the communication holes 21 on two adjacent rib plates 2 is longer, and the high-temperature and high-pressure oil gas can enter the next ventilation cavity 3 after being sufficiently cooled and precipitated in the previous ventilation cavity 3, so that the purpose of sufficiently separating the high-temperature and high-pressure oil gas is gradually achieved, and the effect of separating the high-temperature and high-pressure oil gas is improved.

According to some embodiments of the present utility model, referring to fig. 1-2, communication holes 21 staggered on two adjacent rib plates 2 are respectively formed at a radial inner end of one rib plate 2 and a radial outer end of the other rib plate 2, so that a flow path of high-temperature and high-pressure oil gas between the communication holes 21 on two adjacent rib plates 2 is longest, and the high-temperature and high-pressure oil gas can be better ensured to enter the next ventilation cavity 3 after being sufficiently cooled and precipitated in the previous ventilation cavity 3, and a better oil-gas separation effect on high-temperature and high-pressure is ensured.

According to some embodiments of the present utility model, referring to fig. 1-2, a communication hole 21 is formed at a radially inner end of the rib plate 2 located between the mth ventilation cavity 3 and the mth-1 ventilation cavity 3. Because the radial outer side wall of the Mth ventilation cavity 3 is provided with the ventilation holes 4, and the radial inner end of the rib plate 2 between the Mth ventilation cavity 3 and the Mth ventilation cavity 3 is provided with the communication holes 21, the flow path of high-temperature and high-pressure oil gas between the communication holes 21 and the ventilation holes 4 is longest, and the problem that the oil gas in the Mth ventilation cavity 3 flows out of the ventilation holes 4 without being cooled and depressurized is avoided, so that the separation of the oil and the gas by the ventilation structure can be better realized.

According to some embodiments of the present utility model, referring to fig. 1-3, at least a portion of the adjacent two rib plates 2 are disposed at an acute angle, for example, a portion of the adjacent two rib plates 2 are disposed at an acute angle or all of the adjacent two rib plates 2 are disposed at an acute angle, and the distance between the adjacent two rib plates 2 disposed at an acute angle gradually increases in the inside-out direction, for example, a side of the transmission case 10 near the inner cavity 20 is an inner side, and a side of the transmission case 10 away from the inner cavity 20 is an outer side. By the arrangement, the high-temperature oil gas can be fully contacted with the rib plates 2 after entering the ventilation cavity 3. Because the temperature of the rib plate 2 is lower than that of the high-temperature oil gas, when the high-temperature oil gas contacts with the rib plate 2, the high-temperature oil gas can be partially liquefied into liquid lubricating oil, so that the separation of the oil and the gas is realized. Therefore, at least part of the adjacent two rib plates 2 are arranged at an acute angle, and the distance between the two adjacent rib plates 2 arranged at the acute angle is gradually increased in the direction from inside to outside, so that high-temperature oil gas can be fully contacted with the rib plates 2, and a better oil-gas separation effect is realized. In addition, at least part of adjacent two rib plates 2 are arranged at an acute angle, so that the flowing time of separated lubricating oil can be prolonged, and the cooling effect of the separated lubricating oil is realized.

According to some embodiments of the present utility model, referring to fig. 1-2, the transmission case 10 includes a first case 1 and a second case 5 connected, the end surface of the first case 1 facing the second case 5 is formed with a plurality of first grooves 11, the plurality of first grooves 11 may be disposed at intervals along the circumferential direction of the first case 1, the end surface of the second case 5 facing the first case 1 is formed with a plurality of second grooves 51, the plurality of second grooves 51 may be disposed at intervals along the circumferential direction of the second case 5, the number of second grooves 51 and the number of first grooves 11 are the same and correspond to each other one to one, and the first grooves 11 and the corresponding second grooves 51 together form the ventilation cavity 3. For example, the first groove 11 and the second groove 51 can be formed by die casting, and the die casting has the advantages of small processing amount, high production efficiency, low production cost and the like.

As shown in fig. 1 and 2, in the transmission provided in the present embodiment, the first plate 22 on the first housing 1 is formed between two adjacent first grooves 11, and the second plate 23 on the second housing 5 is formed between two adjacent second grooves 51.

For example, in a specific embodiment of the present utility model, referring to fig. 1-3, a transmission housing 10 includes a first housing 1 and a second housing 5 connected. The transmission case 10 is formed with a ventilation structure that communicates the inner cavity 20 of the transmission case 10 with the outside, and the ventilation structure includes a ventilation hole 4, a communication hole 21, and three ventilation cavities 3. Three first grooves 11 are formed in the end face of the first housing 1 facing the second housing 5, three second grooves 51 are formed in the end face of the second housing 5 facing the first housing 1, and the first grooves 11 and the corresponding second grooves 51 together form the ventilation chamber 3.

The ventilation chambers 3 are a first ventilation chamber 31, a second ventilation chamber 32 and a third ventilation chamber 33 respectively, two adjacent ventilation chambers 3 and the first ventilation chamber 31 and the inner chamber 20 are communicated through the communication hole 21, and a ventilation hole 4 is formed on the radial outer side wall of the third ventilation chamber 33, and the ventilation hole 4 is communicated with the third ventilation chamber 33 and the outside. The two adjacent ventilation cavities 3 are separated by the rib plate 2, the first ventilation cavity 31 is also separated from the inner cavity 20 of the transmission shell 10 by the rib plate 2, the two adjacent rib plates 2 are arranged at an acute angle, and the distance between the two adjacent rib plates 2 is gradually increased in the direction from inside to outside. Each rib 2 includes a first plate 22 formed at the first housing 1 and a second plate 23 formed at the second housing 5.

The communication hole 21 is located at the bottom of the rib plate 2, the communication hole 21 between the first ventilation chamber 31 and the inner chamber 20 of the transmission case 10 is formed at the radially outer end of the first plate body 22, the communication hole 21 between the first ventilation chamber 31 and the second ventilation chamber 32 is formed at the radially inner end of the second plate body 23, and the communication hole 21 between the second ventilation chamber 32 and the third ventilation chamber 33 is formed at the radially inner end of the first plate body 22.

A drive assembly according to an embodiment of a second aspect of the present utility model includes: a transmission according to an embodiment of the above first aspect of the present utility model.

According to the driving assembly of the utility model, by arranging the transmission, by forming one part of the communication holes 21 in the first shell 1 and the other part of the communication holes 21 in the second shell 5, the circulation path of the high-temperature oil gas in the ventilation structure can be longer, the cooling effect of the ventilation structure on the high-temperature oil gas is better, the overall separation effect of the high-temperature oil gas is better, and the loss of lubricating oil is further reduced.

According to an embodiment of the third aspect of the present utility model, a vehicle includes: a drive assembly according to an embodiment of the above second aspect of the present utility model.

According to the vehicle of the utility model, by arranging the driving assembly, by forming a part of the communication holes 21 in the first shell 1 and the other part of the communication holes 21 in the second shell 5, the circulation path of the high-temperature oil gas in the ventilation structure can be longer, the cooling effect of the ventilation structure on the high-temperature oil gas is better, the separation effect of the whole high-temperature oil gas is better, and the loss of lubricating oil is further reduced.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. The transmission is characterized by comprising a transmission shell, wherein the transmission shell comprises a first shell and a second shell which are connected, the first shell and the second shell are independent forming parts, an inner cavity is formed by the first shell and the second shell in a surrounding mode and a ventilation structure is defined by the first shell and the second shell, the ventilation structure is communicated with the inner cavity and the outside, the ventilation structure comprises a ventilation hole, a plurality of communication holes and a plurality of ventilation cavities which are sequentially distributed, the ventilation cavities are sequentially a first ventilation cavity to an Mth ventilation cavity, two adjacent ventilation cavities are communicated through the communication holes, the first ventilation cavity is communicated with the inner cavity through the communication holes, and the radial outer side wall of the Mth ventilation cavity is provided with the ventilation holes which are communicated with the Mth ventilation cavity and the outside;

wherein a part of the communication hole is formed in the first housing and another part of the communication hole is formed in the second housing.

2. The transmission according to claim 1, wherein one of two adjacent communication holes is formed in the first housing, and the other of two adjacent communication holes is formed in the second housing.

3. The transmission of claim 1, wherein the breather chambers are three.

4. The transmission according to claim 1, wherein the transmission case includes a plurality of rib plates arranged at intervals in sequence, adjacent two of the ventilation chambers are separated by the rib plates, the first ventilation chamber is separated from the inner chamber by the rib plates, the rib plates between the adjacent two of the ventilation chambers are formed with the communication holes, and the rib plates between the first ventilation chamber and the inner chamber are formed with the communication holes;

each rib plate comprises a first plate body formed on the first shell and a second plate body formed on the second shell, wherein a part of communication holes are formed on the first plate body, and the other part of communication holes are formed on the second plate body.

5. The transmission according to claim 4, wherein one of two adjacent communication holes is formed in the first plate body, and the other of two adjacent communication holes is formed in the second plate body.

6. The transmission of claim 4, wherein the communication holes are located at or adjacent to a bottom of the web.

7. The transmission of claim 4, wherein at least a portion of adjacent ones of the webs are disposed at an acute angle therebetween, and wherein a distance between adjacent ones of the webs disposed at the acute angle increases in an inside-out direction.

8. The transmission according to any one of claims 1 to 7, wherein a plurality of first grooves are formed in an end face of the first housing facing the second housing, a plurality of second grooves are formed in an end face of the second housing facing the first housing, the number of the second grooves is the same as that of the first grooves and corresponds to one, and the first grooves and the corresponding second grooves together constitute the ventilation chamber.

9. A drive assembly, comprising: the transmission of any one of claims 1-8.

10. A vehicle, characterized by comprising: the drive assembly of claim 9.

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