Vehicle speed reducer and automobile

Abstract

The utility model provides a vehicle speed reducer and an automobile, the vehicle speed reducer comprises a speed reducer shell and a speed reducer body, one side of the speed reducer shell is sunken to form a labyrinth structure, the labyrinth structure is provided with an oil gas cavity, a ventilation channel and an overflow channel, and the ventilation channel and the overflow channel both communicate with the oil gas cavity; the vehicle speed reducer further comprises a labyrinth cover piece and a ventilation valve assembly, the labyrinth cover piece is arranged on the labyrinth structure in a covering mode, the labyrinth cover piece is provided with an air inlet channel, and the ventilation valve assembly is installed on the ventilation channel. A mixture of oil and gas in the speed reducer shell flows into the oil gas cavity through the gas inlet channel, the oil flows back into the containing cavity from the overflow channel, and the gas is discharged from the ventilation valve assembly. According to the vehicle speed reducer, the ventilation valve assembly and the labyrinth structure are integrated on the speed reducer shell, and the air tightness, the dustproof and waterproof performance and the compactness of the whole structure of the speed reducer are improved.

Description

Technical Field

[0001] This application relates to the field of vehicle speed reducers, and particularly to vehicle speed reducers and automobiles.

Background Art

[0002] During the operation of an automotive speed reducer, a pressure difference will be generated between the internal and external gases. The breather valve can maintain the pressure balance between the inside and outside cavities of the speed reducer. The existing breather valves are mainly independent structures and are separately installed on the speed reducer housing. However, the breather valve needs to be exposed for a long time during use, and is easily affected by impurities such as dust and oil stains, as well as the aging of seals, resulting in the problem of unreliable sealing and breather valve failure.

Utility Model Content

[0003] This application provides a vehicle speed reducer and an automobile, which integrate a breather valve assembly and a labyrinth structure, improving the airtightness, dust and water protection performance, and overall structural compactness of the speed reducer.

[0004] An embodiment of this application provides a vehicle speed reducer, which includes a speed reducer housing and a speed reducer body; the speed reducer housing has a receiving cavity, and the speed reducer body is installed in the receiving cavity;

[0005] A labyrinth structure is formed by a depression on one side of the speed reducer housing. The labyrinth structure is provided with an oil and gas chamber, and the labyrinth structure includes a breather channel and an overflow channel, and both the breather channel and the overflow channel communicate with the oil and gas chamber;

[0006] The vehicle speed reducer further includes a labyrinth cover and a breather valve assembly. The labyrinth cover covers the labyrinth structure, and the labyrinth cover is provided with an intake channel, and the breather valve assembly is installed on the breather channel;

[0007] In the above solution, the oil and gas mixture in the speed reducer housing flows into the oil and gas chamber through the intake channel, the oil flows back into the receiving cavity through the overflow channel, and the gas is discharged through the breather valve assembly.

[0008] In one embodiment, the labyrinth structure is located on the side of the speed reducer housing close to the input shaft of the speed reducer body, and the breather channel of the labyrinth structure extends along the direction perpendicular to the ground of the speed reducer housing.

[0009] In one embodiment, the inner wall of the labyrinth structure is provided with a plurality of protruding ribs arranged along the direction parallel to the input shaft, and the plurality of protruding ribs divide the oil and gas chamber into a plurality of connected sub-chambers.

[0010] In one embodiment, the protruding rib includes two first ribs arranged in an inverted V shape and a second rib, and the second rib is located between the two first ribs and is arranged in a boat shape; the air permeation channel is arranged opposite to the second rib, and the air inlet channel and the overflow channel are respectively located on both sides of the two first ribs away from the second rib.

[0011] In one embodiment, the air permeation valve assembly includes an oil absorption member, a separation member, an air permeation member, and a dust prevention member. The oil absorption member, the separation member, and the air permeation member are all installed in the air permeation channel, and the oil absorption member is close to the oil and gas chamber, the air permeation member is far from the oil and gas chamber, and the separation member is located between the oil absorption member and the air permeation member; the dust prevention member is located outside the reducer housing and covers the air permeation channel.

[0012] In one embodiment, the separation member is a plastic partition board, and the plastic partition board is tightly connected to the air permeation channel.

[0013] In one embodiment, the air permeation member is a waterproof and breathable composite film, and the waterproof and breathable composite film is a laminated expanded polytetrafluoroethylene layer and a polypropylene woven fabric layer.

[0014] In one embodiment, the labyrinth cover member is provided with an air inlet boss protruding towards the accommodation chamber, and the air inlet channel is arranged on the air inlet boss and communicates with the oil and gas chamber.

[0015] In one embodiment, the labyrinth cover member is an oil baffle, the oil baffle is provided with fastening holes, and the oil baffle is locked and connected to the reducer housing through fasteners.

[0016] The present application also provides an automobile, and the automobile includes the above-mentioned vehicle reducer applicable to one type.

[0017] The present application provides a vehicle reducer. The vehicle reducer includes a reducer housing and a reducer body. One side of the reducer housing is recessed to form a labyrinth structure, and the air permeation valve assembly is installed on the air permeation channel of the labyrinth structure. This reducer housing integrating the air permeation valve assembly and the labyrinth structure can improve the overall airtightness, dust and water protection performance, and structural compactness of the reducer.

Description of the Drawings

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0019] Figure 1Schematic diagram of the reducer housing structure of a vehicle reducer provided by an embodiment of the present application.

[0020] Figure 2 Schematic diagram of the labyrinth structure of a vehicle reducer provided by an embodiment of the present application.

[0021] Figure 3 Partial schematic diagram of the labyrinth structure of a vehicle reducer provided by an embodiment of the present application.

[0022] Figure 4 Schematic diagram of the air intake channel of the labyrinth structure of a vehicle reducer provided by an embodiment of the present application.

[0023] Figure 5 Schematic diagram of the oil baffle of the labyrinth structure of a vehicle reducer provided by an embodiment of the present application.

[0024] Figure 6 Schematic diagram of the breather valve structure of a vehicle reducer provided by an embodiment of the present application.

[0025] Figure 7 Schematic diagram of the breather channel of a vehicle reducer provided by an embodiment of the application.

[0026] Reference numerals:

[0027] 10 - Reducer housing;

[0028] 11 - Accommodating cavity;

[0029] 12 - Labyrinth structure; 121 - Protruding rib; 122 - First rib; 123 - Second rib;

[0030] 13 - Oil and gas chamber; 131 - Sub - chamber; 132 - First chamber; 133 - Second chamber; 134 - Third chamber;

[0031] 14 - Breather channel; 141 - Bottom wall;

[0032] 15 - Overflow channel;

[0033] 16 - Labyrinth cover; 161 - Air intake boss; 162 - Oil baffle; 163 - Bolt hole position;

[0034] 17 - Breather valve assembly; 171 - Oil absorption part; 172 - Isolation part; 173 - Breather part; 174 - Dust - proof part;

[0035] 1711 - Breather and oil absorption cotton; 1721 - Plastic partition; 1731 - Waterproof and breathable composite film; 1741 - Dust - proof cover;

[0036] 17411 - Breather hole;

[0037] 18 - Intake passage; 181 - First intake passage; 182 - Second intake passage; 183 - Third intake passage;

[0038] 20 - Reducer body.

Detailed implementation manners

[0039] For a better understanding of the technical solution of this application, the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0040] It should be clear that the described embodiments are only a part of the embodiments of this application, rather than all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of this application.

[0041] The terms used in the embodiments of this application are only for the purpose of describing specific embodiments, and are not intended to limit this application. The singular forms of "a", "the" and "said" used in the embodiments of this application and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise.

[0042] It should be understood that the term " / and" used herein is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " herein generally represents an "or" relationship between the associated objects before and after.

[0043] This application provides a vehicle reducer, Figure 1 which is a schematic structural diagram of the reducer housing of a vehicle reducer provided by an embodiment of this application; Figure 2 which is a schematic diagram of the labyrinth structure of a vehicle reducer provided by an embodiment of this application, as Figure 1 and Figure 2 shown, a vehicle reducer includes a reducer housing 10 and a reducer body 20. The reducer housing 10 has a receiving cavity 11, and the reducer body 20 is installed in the receiving cavity 11;

[0044] One side of the reducer housing 10 is recessed to form a labyrinth structure 12. The labyrinth structure 12 is provided with an oil and gas chamber 13. The labyrinth structure 12 includes a ventilation channel 14 and an overflow channel 15. The ventilation channel 14 and the overflow channel 15 are both communicated with the oil and gas chamber 13;

[0045] Please continue to refer to Figure 4 and Figure 6 , the vehicle reducer further includes a labyrinth cover member 16 and a ventilation valve assembly 17. The labyrinth cover member 16 is covered on the labyrinth structure 12. The labyrinth cover member 16 is provided with an intake passage 18, and the ventilation valve assembly 17 is installed on the ventilation channel 14;

[0046] The oil and gas mixture in the reducer housing 10 flows into the oil and gas chamber 13 through the air intake passage 18. The oil flows back into the accommodation chamber 11 through the overflow passage 15, and the gas is discharged outside the reducer housing 10 through the breather valve assembly 17.

[0047] In the above solution, the reducer body 20 operates inside the sealed reducer housing 10. A large amount of heat is generated during the high-speed rotation of the shaft and gear set of the reducer body 20. Bubbles also appear in the oil of the reducer housing 10. The oil mixed with bubbles splashes into the air intake passage 18 of the labyrinth cover 16 driven by the rotating shaft and gear set in the reducer body 20. The oil and gas mixture flows through the oil and gas chamber 13 provided in the labyrinth structure 12. The gas in the oil and gas mixture is discharged outside the reducer housing 10 through the breather valve assembly 17, reducing the air pressure and temperature inside the reducer housing 10, ensuring the airtightness of the reducer housing 10 without oil leakage, and reducing the risk of damage to the shaft and gear set in the reducer body 20 caused by high temperature due to oil leakage. One side of the reducer housing 10 in the present application is recessed to form the labyrinth structure 12, and the breather valve assembly 17 is installed on the air permeable passage 14 of the labyrinth structure 12. This reducer housing 10 integrating the breather valve assembly 17 and the labyrinth structure 12 can improve the overall airtightness, dust and water resistance performance and structural compactness of the reducer. At the same time, if the air pressure inside the reducer housing 10 is too low, the air outside the reducer housing 10 can also enter the inside of the reducer housing 10 through the breather valve assembly 17 and the oil and gas chamber 13 to maintain the balance of the internal and external air pressures inside the reducer housing 10.

[0048] Please continue to refer to Figure 1 , the labyrinth structure 12 of the vehicle reducer is a cavity component inside the reducer housing 10, located inside the reducer housing 10 and close to the input shaft side of the reducer body 20. The air permeable passage 14 of the labyrinth structure 12 is close to the outer wall of the reducer housing 10. The air permeable passage 14 of the labyrinth structure 12 extends along the vertical ground direction of the reducer housing 10 towards the roof direction and penetrates the outer wall of the reducer housing 10.

[0049] In the above solution, the labyrinth structure 12 is arranged inside the reducer housing 10 and close to the input shaft side of the reducer body 20, and is above the reducer body 20 assembly, which is beneficial for the gas to be discharged outwards through the air permeable passage 14 and can also reduce the risk of oil spillage.

[0050] Specifically, please continue to refer to Figure 3 , the inner wall of the labyrinth structure 12 is provided with a plurality of protruding ribs 121 arranged along the direction parallel to the input shaft. The plurality of protruding ribs 121 divide the oil and gas chamber 13 into a plurality of interconnected sub-chambers 131.

[0051] Please continue to refer toFigure 2 and Figure 3 , the labyrinth structure 12 further includes a protruding rib 121 and a sub-chamber 131. The protruding rib 121 is provided on the inner wall of the labyrinth structure 12 and protrudes into the reducer housing 10 along the direction parallel to the input shaft. It can be integrally formed with the reducer housing 10. The protruding rib 121 divides the oil-gas chamber 13 inside the labyrinth structure 12 into multiple sub-chambers 131. There are channels between the multiple sub-chambers 131 that can communicate with each other, and one of the chambers is communicated with the ventilation channel 14.

[0052] In the above solution, the protruding rib 121 divides the oil-gas chamber 13 inside the labyrinth structure 12 into multiple sub-chambers 131, increasing the tortuosity of the flow path of the oil and gas mixture entering the labyrinth structure 12, which is beneficial to the oil-gas separation during the flow of the oil and gas mixture entering the labyrinth structure 12. It can not only prevent the oil from overflowing but also facilitate the gas discharge.

[0053] In some embodiments, as Figure 4 shown, the protruding rib 121 includes a first rib 122 and a second rib 123. Among them, the two first ribs 122 are arranged in an inverted V shape, and the second rib 123 is located between the two first ribs 122 and is arranged in a boat shape; the first rib 122 and the second rib 123 protrude into the reducer housing 10 along the direction parallel to the input shaft and are flush with the top surface of the labyrinth structure 12. The first rib 122 and the second rib 123 can be integrally die-cast or cast with the reducer housing 10, or can be formed by secondary machining;

[0054] The ventilation channel 14 is located on the inner wall of the reducer housing 10 opposite to the sunken area of the boat-shaped structure of the second rib 123 and penetrates the inner wall of the reducer housing 10. The intake channel 18 and the overflow channel 15 are respectively located on both sides of the two first ribs 122 away from the second rib 123.

[0055] In some embodiments, the first rib 122 and the second rib 123 divide the oil-gas chamber 13 inside the labyrinth structure 12 into at least three sub-chambers 131. The three sub-chambers 131 are respectively the first chamber 132, the second chamber 133 and the third chamber 134. Among them, the third chamber 134 is located between the second rib 123 and the ventilation channel 14, and the first chamber 132 and the second chamber 133 are located on one side of the third chamber 134.

[0056] The first intake channel 181 is located at the bottom between the first chamber 132 and the second chamber 133, and the second intake channel 182 is located at the bottom between the second chamber 133 and the third chamber 134.

[0057] The overflow channel 15 is away from the first air inlet channel 181 and is located at the bottom of the first rib 122. The air inlet channel 18 and the overflow channel 15 are in communication with each other. The air inlet channel 18 and the overflow channel 15 are in the shape of a duct, and the duct can be circular or irregular. The air inlet channel 18 and the overflow channel 15 can be formed by machining or other methods.

[0058] In the above solution, the outer shape of the protruding rib 121 is tortuous, dividing the inner part of the labyrinth structure 12 into at least three sub-chambers 131, increasing the tortuosity of the flow path of the oil and gas mixture entering the labyrinth structure 12, extending the reflux path, and facilitating the oil-gas separation of the oil and gas mixture entering the labyrinth structure 12 during the flow process. It can not only prevent the oil from overflowing but also facilitate the gas discharge.

[0059] In some embodiments, as Figure 6 shown, the breather valve assembly 17 includes an oil-absorbing member 171, a separator 172, a breather member 173, and a dust-proof member 174. The oil-absorbing member 171, the separator 172, and the breather member 173 are all installed in the breather channel 14. The oil-absorbing member 171 is close to the third chamber 134, the breather member 173 is away from the third chamber 134, and the separator 172 is located between the oil-absorbing member 171 and the breather member 173; the dust-proof member 174 is located outside the reducer housing 10 and covers the breather channel 14.

[0060] In the above solution, the oil-absorbing member 171, the separator 172, and the breather member 173 are all installed in the breather channel 14. Its structure is compact, the hierarchical functions are clear, it can not only separate oil and water but also breathe, and this breather valve assembly 17 has complete composite functions.

[0061] In some embodiments, as Figure 1 shown, the separator 172 can be a plastic partition 1721. The plastic partition 1721 and the breather channel 14 can adopt a circular structure, and the plastic partition 1721 and the breather channel 14 are connected with an interference fit.

[0062] In some embodiments, the surface of the plastic partition 1721 can be provided with through holes, gratings or other through structures for breathing. The breather channel 14 is located on the inner wall of the reducer housing 10 opposite to the sunken area of the boat-shaped structure of the second rib 123 and penetrates the inner wall of the reducer housing 10. The breather channel 14 can be a through-hole structure directly leading to the inner wall of the reducer housing 10, or the breather channel 14 can be provided with a bottom wall 141 at the connection with the third chamber 134, and the bottom wall 141 is provided with a plurality of through holes or other through structures. The breather channel 14 can be formed by machining or other methods.

[0063] In some embodiments, the oil-absorbing member 171 can use a breathable oil-absorbing cotton 1711, and the breathable oil-absorbing cotton 1711 is installed on the bottom wall 141 of the breather channel 14.

[0064] In the above solution, the oil absorption member 171 in the air permeable valve assembly 17 is an air permeable and oil absorption cotton 1711, and the isolation member 172 is a plastic partition 1721. The air permeable and oil absorption cotton 1711 is located on the bottom wall 141 of the air permeable channel 14, which can absorb oil and allow air to pass through. The plastic partition 1721 has corrosion resistance, can not only limit the air permeable and oil absorption cotton 1711, but also discharge and allow air to enter, playing a role of partition in the air permeable channel 14.

[0065] In some embodiments, such as Figure 1 shown, the air permeable member 173 in the air permeable valve assembly 17 is a waterproof and air permeable composite membrane 1731. The waterproof and air permeable composite membrane 1731 can be a laminated expanded polytetrafluoroethylene layer and a polypropylene woven fabric layer or other types of waterproof and air permeable materials.

[0066] In some embodiments, the waterproof and air permeable composite membrane 1731 can be a circular sheet structure and can be connected and fixed to the dustproof member 174 by ultrasonic welding or other methods.

[0067] In the above solution, the waterproof and air permeable composite membrane 1731 is ultrasonically welded to the dustproof member 174, which can ensure the firmness of the connection between the waterproof and air permeable composite membrane 1731 and the dustproof member 174. This composite structure of the laminated expanded polytetrafluoroethylene layer and the polypropylene woven fabric layer can fully pass gas and prevent water or dust and debris outside the reducer housing 10 from entering the inside of the reducer housing 10.

[0068] In some embodiments, the dustproof member 174 can be a dustproof cover 1741. The dustproof cover 1741 is covered on the top of the air permeable valve assembly 17 protruding from the outer wall of the reducer housing 10. The dustproof cover 1741 can be circular or other shapes. The appearance of the dustproof cover 1741 can be in an inverted U shape. The material of the dustproof cover 1741 can be a plastic material and its interior is provided with a connection position for ultrasonic welding connection or other connection methods with the waterproof and air permeable membrane.

[0069] To facilitate the connection between the dustproof cover 1741 and the reducer housing 10, the reducer housing 10 is provided with a protruding connection portion. The connection portion communicates with the air permeable channel 14 and is provided with a threaded structure or a clamping structure, so as to facilitate the connection between the reducer housing 10 and the air permeable valve assembly 17. The closed end of the inverted U-shaped structure of the dustproof cover 1741, that is, the top of the dustproof cover 1741, can be provided with a plurality of air holes 17411 or grid and other through structures for air permeability.

[0070] Such as Figure 4As shown, the labyrinth cover 16 is a flat structure. An intake boss 161 is provided on the outer surface of the labyrinth cover 16, i.e., in the direction of protruding close to the accommodation cavity 11. The intake boss 161 and the labyrinth cover 16 are of an integral structure. The outer shape of the intake boss 161 can be a cylindrical structure or other shapes. A third intake passage 183 communicating with the oil and gas chamber 13 is provided inside the intake boss 161.

[0071] In the above solution, the intake boss 161 and the labyrinth cover 16 are of an integral structure, making the connection between the intake boss 161 and the labyrinth cover 16 firm and eliminating the need for secondary connection and fixation. Its structure is simple and the manufacturing cost is low.

[0072] In some embodiments, as Figure 4 shown, the labyrinth cover 16 is an oil baffle 162. The oil baffle 162 is a rectangular plate-like structure made of plastic. An intake boss 161 is provided on the oil baffle 162. The outer shape of the intake boss 161 is cylindrical and is integrally formed with the oil baffle 162. The third intake passage 183 provided inside the intake boss 161 is a conical inner hole structure. The large-opening end of the conical inner hole faces the inside of the reducer housing 10, and the small-opening end of the conical inner hole faces the first chamber 132 inside the labyrinth structure 12.

[0073] For the convenience of installation and connection of the oil baffle 162, bolt holes 163 are provided at both ends of the oil baffle 162. The oil baffle 162 is locked and connected to the fastening position of the reducer housing 10 through bolts.

[0074] In the above solution, the intake boss 161 of the oil baffle 162 is a cylindrical structure, and a conical third intake passage 183 is provided inside the oil baffle 162. This structure can enable an appropriate amount of the oil and gas mixture inside the reducer housing 10 to enter the inner chamber of the labyrinth structure 12. The oil baffle 162, the intake boss 161, and the bolt holes 163 are all made of plastic and integrally formed. Its structure is simple, the processing cost is low, and it has certain corrosion resistance.

[0075] The present application provides a vehicle reducer housing 10 including two parts of the housing (not shown in the figure) that are buckled together. The labyrinth structure 12 is placed inside one part of the housing. The breather valve assembly 17 is arranged inside the reducer housing 10 and is connected to the labyrinth structure 12. This reducer housing 10 integrating the breather valve assembly 17 and the labyrinth structure 12 improves the airtightness, dust and water protection performance, and overall structural compactness of the reducer. At the same time, the ultrasonic welding technology of the dust cover 1741 and the waterproof breathable composite membrane 1731 ensures the sealing performance and waterproof performance of the breather valve.

[0076] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present utility model shall be included within the scope of protection of the present utility model.

Claims

1. A vehicle retarder, characterized in that, The vehicle retarder includes a retarder housing and a retarder body; the retarder housing has a receiving cavity, and the retarder body is installed in the receiving cavity; One side of the retarder housing is recessed to form a labyrinth structure, the labyrinth structure is provided with an oil-gas chamber, and the labyrinth structure includes a ventilation channel and an overflow channel, and both the ventilation channel and the overflow channel communicate with the oil-gas chamber; The vehicle retarder further includes a labyrinth cover and a ventilation valve assembly, the labyrinth cover is covered on the labyrinth structure, the labyrinth cover is provided with an air inlet channel, and the ventilation valve assembly is installed on the ventilation channel; The oil-liquid and gas mixture in the retarder housing flows into the oil-gas chamber through the air inlet channel, the oil liquid flows back into the receiving cavity through the overflow channel, and the gas is discharged through the ventilation valve assembly.

2. The vehicle retarder according to claim 1, wherein The labyrinth structure is located on the side of the retarder housing close to the input shaft of the retarder body, and the ventilation channel of the labyrinth structure extends along the direction perpendicular to the ground of the retarder housing.

3. The vehicle retarder according to claim 2, characterized in that, The inner wall of the labyrinth structure is provided with a plurality of protruding ribs arranged along the direction parallel to the input shaft, and the plurality of protruding ribs divide the oil-gas chamber into a plurality of interconnected sub-chambers.

4. The vehicle retarder according to claim 3, characterized in that, The protruding rib includes two first ribs arranged in an inverted V shape and a second rib, and the second rib is located between the two first ribs and is arranged in a boat shape; the ventilation channel is arranged opposite to the second rib, and the air inlet channel and the overflow channel are respectively located on both sides of the two first ribs away from the second rib.

5. The vehicle retarder according to claim 1, characterized in that, The ventilation valve assembly includes an oil absorption member, a separator, a ventilation member and a dust-proof member, the oil absorption member, the separator and the ventilation member are all installed in the ventilation channel, and the oil absorption member is close to the oil-gas chamber, the ventilation member is far from the oil-gas chamber, and the separator is located between the oil absorption member and the ventilation member; The dust-proof member is located outside the retarder housing and covers the ventilation channel.

6. The vehicle retarder according to claim 5, wherein The separator is a plastic partition board, and the plastic partition board is tightly connected to the ventilation channel.

7. The vehicle retarder according to claim 5, characterized in that, The ventilation member is a waterproof and breathable composite film, and the waterproof and breathable composite film is a laminated expanded polytetrafluoroethylene layer and a polypropylene woven fabric layer.

8. The vehicle retarder according to claim 1, characterized in that, The labyrinth cover is provided with an air inlet boss protruding towards the receiving cavity, and the air inlet channel is arranged on the air inlet boss and communicates with the oil-gas chamber.

9. The vehicle retarder according to claim 8, wherein The labyrinth cover is an oil baffle, the oil baffle is provided with fastening holes, and the oil baffle is locked and connected to the retarder housing through fasteners.

10. A vehicle, characterized in that, The vehicle includes the vehicle retarder according to any one of claims 1 to 9.

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