Electric drive axle and new energy vehicle

Abstract

The application discloses an electric drive axle and a new energy vehicle. The electric drive axle comprises a main shell, a motor main body and a reducer main body, the main shell comprises a first part and a second part, the first part and the second part are integrated structures, the first part has a first containing space, and the second part has a second containing space; the first part or the second part further forms an integrated oil cavity, the integrated oil cavity is in communication with the first containing space and the second containing space; the motor main body is arranged in the first containing space; the reducer main body is arranged in the second containing space, and the reducer main body is in transmission connection with the motor main body. The main shell has the integrated oil cavity, so that the integrated oil cavity can be in communication with the first containing space and the second containing space at the same time, thereby only one integrated oil cavity can be arranged to lubricate the motor main body and the reducer main body, the size of the electric drive axle can be reduced, and in addition, the amount of lubricating oil in the electric drive axle can be reduced.

Description

Technical Field

[0001] This application relates to the field of new energy vehicle technology, and in particular to an electric drive axle and a new energy vehicle. Background Technology

[0002] The electric drive axle is one of the main components of new energy vehicles, used to provide driving force to drive the wheels. Among the related technologies, one type of electric drive axle has been proposed, but it suffers from technical problems such as large size and large amount of lubricating oil required. Utility Model Content

[0003] In view of the above problems, this application provides an electric drive axle and a new energy vehicle, which can reduce the size of the electric drive axle and also reduce the amount of lubricating oil.

[0004] To solve the above-mentioned technical problems, one technical solution adopted in this application is to provide an electric drive bridge, which includes a main housing, a motor body, and a reducer body. The main housing includes a first part and a second part, which are an integrated structure. The first part has a first accommodating space, and the second part has a second accommodating space. The first part or the second part further forms an integrated oil chamber, which communicates with both the first and second accommodating spaces. The motor body is disposed in the first accommodating space, and the reducer body is disposed in the second accommodating space, with the reducer body being drively connected to the motor body.

[0005] As described above, the main housing has an integrated oil chamber. The integrated main housing also has a first accommodating space and a second accommodating space, so that the integrated oil chamber can be connected to the first accommodating space and the second accommodating space at the same time. This allows only one integrated oil chamber to be set up to lubricate the motor body and the reducer body, which can reduce the size of the electric drive bridge. In addition, it can also reduce the amount of lubricating oil in the electric drive bridge.

[0006] In one possible implementation, the electric drive bridge further includes: a lubrication assembly, the lubrication assembly being disposed corresponding to the integrated oil cavity, the main housing forming an oil passage, the integrated oil cavity communicating with the first accommodating space and the second accommodating space through the oil passage; the lubrication assembly includes: an oil delivery device, the oil delivery device being disposed in the oil passage, the oil delivery device being configured to deliver oil from the integrated oil cavity to the first accommodating space and the second accommodating space.

[0007] The above-mentioned system can deliver lubricating oil through the oil delivery device and oil passage to lubricate the motor body and the reducer body.

[0008] In one possible implementation, the first accommodating space and the second accommodating space are arranged adjacent to each other, the integrated oil cavity is arranged adjacent to the first accommodating space, and the integrated oil cavity is arranged adjacent to the second accommodating space.

[0009] As mentioned above, the integrated oil chamber is adjacent to both the first accommodating space and the second accommodating space, which can reduce the length of the oil passage. In addition, the reduction in the length of the oil passage can further reduce the amount of lubricating oil.

[0010] In one possible implementation, the second portion forms the integrated oil cavity, the second accommodating space and the integrated oil cavity are located in a first direction of the first accommodating space, and the integrated oil cavity is located in a second direction of at least a portion of the second accommodating space, the first direction being perpendicular to the second direction.

[0011] The above allows the integrated oil cavity to be adjacent to both the first accommodating space and the second accommodating space simultaneously.

[0012] In one possible implementation, the oil passage is parallel to the first direction.

[0013] As mentioned above, the oil passage is parallel to the first direction, which can reduce the resistance of the oil conveying device when conveying oil and facilitate oil conveying.

[0014] In one possible implementation, the lubrication assembly further includes an oil baffle assembly disposed in the oil passage and configured to restrict the flow of lubricating oil from the integrated oil chamber.

[0015] As mentioned above, the oil baffle assembly can reduce the amount of lubricating oil entering the first and second accommodating spaces when the electric drive bridge is tilted, thereby reducing the amount of lubricating oil.

[0016] In one possible implementation, the oil blocking assembly includes: a mounting member fixed to the oil passage; and an oil blocking member pivotally mounted on the mounting member, wherein when there is sufficient lubricating oil in the first accommodating space and / or the second accommodating space, the oil blocking member rotates to prevent lubricating oil from flowing out of the integrated oil cavity.

[0017] As mentioned above, the oil baffle assembly restricts the flow of lubricating oil from the integrated oil chamber.

[0018] In one possible implementation, the motor body includes an output shaft; the reducer body includes a drive shaft, the first accommodating space communicates with the second accommodating space, wherein both ends of the output shaft are rotatably fixed to the first accommodating space via bearings, one end of the drive shaft is rotatably fixed to the second accommodating space via bearings, and the other end of the drive shaft is drively connected to the output shaft and floats and is supported in the second accommodating space; or both ends of the drive shaft are rotatably fixed to the second accommodating space via bearings, one end of the output shaft is rotatably fixed to the first accommodating space via bearings, and the other end of the output shaft is drively connected to the drive shaft and floats and is supported in the first accommodating space.

[0019] As mentioned above, the output shaft and the drive shaft are fixed together by three bearings, which reduces the number of bearings used.

[0020] In one possible implementation, the output shaft is connected to the drive shaft via a spline drive.

[0021] As mentioned above, the output shaft can drive the transmission shaft to rotate.

[0022] In one possible implementation, the electric drive axle further includes a differential, the differential comprising: an axle housing having a receiving cavity; a differential body disposed in the receiving cavity and drively connected to the reducer body; and an active lubrication assembly disposed corresponding to the differential body and configured to spray lubricating oil into the receiving cavity.

[0023] The speed difference can be adjusted via the differential.

[0024] In one possible implementation, the differential body includes a rotating gear, and the differential also includes an oil baffle surrounding one or more sides of the rotating gear to reduce oil churning losses when the rotating gear rotates.

[0025] As mentioned above, the oil baffle can reduce oil churning losses when the rotating gear is rotating.

[0026] In one possible implementation, the oil baffle is formed with an oil baffle groove, and the rotating gear is at least partially located within the oil baffle groove.

[0027] As mentioned above, the fact that the rotating gear is at least partially located in the oil baffle groove can reduce the oil churning loss when the rotating gear rotates.

[0028] In one possible implementation, the oil-blocking groove has one or more oil-passing structures on its groove wall.

[0029] As described above, the oil passage structure allows lubricating oil to enter the oil baffle groove to lubricate the rotating gears.

[0030] In one possible implementation, the two ends of the differential body are rotatably fixed to the accommodating cavity by bearings, the axle housing has bearing lubrication channels, and the active lubrication assembly supplies lubricating oil to the bearings at both ends of the differential body through the bearing lubrication channels; the axle housing also has accommodating cavity lubrication channels, and the active lubrication assembly supplies oil to the accommodating cavity through the accommodating cavity lubrication channels.

[0031] The above can lubricate the differential body.

[0032] In one possible implementation, the differential further includes an oil baffle block located in the receiving cavity.

[0033] Installing an oil baffle inside the receiving cavity can reduce the amount of lubricating oil inside the receiving cavity.

[0034] In one possible implementation, the oil baffle is located on the side of the accommodating cavity facing the ground.

[0035] The above methods can better reduce the amount of lubricating oil required.

[0036] To solve the above-mentioned technical problems, another technical solution adopted in this application is to provide a new energy vehicle, which includes an electric drive axle, wherein the electric drive axle is the aforementioned battery device.

[0037] The aforementioned new energy vehicle has an integrated oil chamber in its main housing. The integrated main housing also has a first accommodating space and a second accommodating space, so that the integrated oil chamber can be connected to both the first and second accommodating spaces at the same time. This allows only one integrated oil chamber to lubricate the motor body and the reducer body, which can reduce the size of the electric drive axle. In addition, it can also reduce the amount of lubricating oil in the electric drive axle.

[0038] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above contents and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0039] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0040] Figure 1 This is a schematic diagram of the structure of a new energy vehicle according to one or more embodiments of this application;

[0041] Figure 2 This is a schematic diagram of the structure of an electric drive bridge according to one or more embodiments of this application;

[0042] Figure 3 for Figure 2 Schematic diagram of the internal structure of the main housing of the electric drive bridge;

[0043] Figure 4 for Figure 3 Enlarged schematic diagram of part of the structure;

[0044] Figure 5 for Figure 4 Schematic diagram of the middle oil baffle assembly;

[0045] Figure 6 for Figure 2 Schematic diagram of the internal structure of the differential housing in an electric drive axle;

[0046] Figure 7 for Figure 6 Enlarged schematic diagram of part of the differential structure;

[0047] Figure 8 for Figure 6 Enlarged schematic diagram of another part of the differential structure;

[0048] Figure 9 for Figure 7 Exploded view of the structure of the intermediate oil baffle;

[0049] Figure 10 for Figure 7 A schematic diagram of the oil passage structure on the intermediate oil baffle.

[0050] Among them, 1000, New Energy Vehicle; 200, Controller; 300, Motor; 100, Battery Device; 10, Electric Drive Axle; 11, Main Housing; 111, First Part; 112, Second Part; 121, Motor Body; 1211, Output Shaft; 122, Reducer Body; 1221, Drive Shaft; 130, Integrated Oil Chamber; 131, Oil Circuit Channel; a, First Direction; b, Second Direction; 140, Oil Baffle Assembly; 141, Mounting Part; 142, Oil Baffle; 143, Mounting Hole; 150, Bearing; 160, Differential; 161, Axle Housing; 162, Accommodation Chamber; 163, Differential Body; 1631, Bearing Lubricating Oil Passage; 1632, Accommodation Chamber Lubricating Oil Passage; 164, Rotary Gear; 165, Oil Baffle; 1651, Oil Passage Structure; 171, Left Wheel Hub; 172, Right Wheel Hub. Detailed Implementation

[0051] The embodiments of the technical solution of this application will be described in detail below. The following embodiments are only used to illustrate the technical solution of this application more clearly, and are therefore only examples, and should not be used to limit the scope of protection of this application.

[0052] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0053] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, unless otherwise explicitly specified, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0054] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0055] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0056] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0057] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0058] In existing technologies, electric drive bridges typically include a motor and a reducer. To extend the lifespan of the motor and reducer and ensure their stable and efficient operation, lubrication is required. In related technologies, two oil chambers are needed to lubricate the motor and reducer separately. The use of two oil chambers increases the size of the electric drive bridge and also results in a large volume of lubricating oil within it.

[0059] Based on the above considerations, in order to solve the technical problems of large size and large amount of lubricating oil in the existing electric drive axle, this application proposes an electric drive axle and a new energy vehicle.

[0060] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of a new energy vehicle according to one or more embodiments of this application.

[0061] New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A battery device 100 is internally installed in the new energy vehicle 1000, and the battery device 100 can be located at the bottom, front, or rear of the new energy vehicle 1000. The battery device 100 can be used to power the new energy vehicle 1000; for example, the battery device 100 can serve as the operating power source for the new energy vehicle 1000. The new energy vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, to meet the power needs of the new energy vehicle 1000 during starting, navigation, and driving.

[0062] In some embodiments of this application, the battery device 100 can not only serve as the operating power source for the new energy vehicle 1000, but also as the driving power source for the new energy vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the new energy vehicle 1000.

[0063] To improve the performance of new energy vehicles, this application provides an electric drive axle and a new energy vehicle. Please refer to the following: Figure 2 and Figure 3 , Figure 2 This is a schematic diagram of the structure of an electric drive bridge according to one or more embodiments of this application; Figure 3 for Figure 2 A schematic diagram of the internal structure of the main housing of the electric drive bridge.

[0064] In some embodiments, the electric drive bridge 10 includes a main housing 11, a motor body 121, and a reducer body 122. The main housing 11 includes a first part 111 and a second part 112, which are integral structures. The first part 111 has a first accommodating space (not shown), and the second part 112 has a second accommodating space (not shown). The first part 111 or the second part 112 also forms an integrated oil chamber 130, which communicates with the first accommodating space and the second accommodating space. The motor body 121 is disposed in the first accommodating space, and the reducer body 122 is disposed in the second accommodating space. The reducer body 122 is drively connected to the motor body 121.

[0065] The main housing 11 serves a protective and fixing function, and its material can be aluminum alloy, steel, high-strength composite materials, etc. In this embodiment, the first part 111 and the second part 112 are an integrated structure, which can improve the overall integrity and structural strength of the electric drive bridge 10. The integrated main housing 11 can be manufactured by die casting, stamping, etc. The first accommodating space is used to accommodate and fix the motor body 121, and the second accommodating space is used to accommodate and fix the reducer body 122. The motor body 121 is used to convert electrical energy into mechanical energy for the rotation of the output shaft 1211 of the motor body 121. When the output shaft 1211 rotates, it drives the transmission shaft 1221 of the reducer body 122 to rotate. The reducer body 122 is used to reduce the speed and amplify the torque to match the wheel speed. The integrated oil chamber 130 is used to store lubricating oil. The lubricating oil is distributed to the first accommodating space and the second accommodating space to lubricate the motor body 121 and the reducer body 122, thereby reducing friction loss and maintaining the stable operation of the electric drive bridge 10. Related technologies propose an electric drive bridge 10. In these technologies, the motor housing and the reducer housing are independent housings. To lubricate the motor and reducer, each housing needs to form its own oil chamber to reduce the risk of lubricating oil leakage. The multiple oil chambers result in a larger size for the electric drive bridge 10 and a larger volume of lubricating oil within it. In this embodiment, either the first portion 111 or the second portion 112 forms an integrated oil chamber 130. This integrated oil chamber 130 communicates with both the first and second accommodating spaces. Since the first portion 111 and the second portion 112 are an integrated structure, the integrated oil chamber 130 can communicate with both the first and second accommodating spaces simultaneously, ensuring high sealing reliability and low risk of lubricating oil leakage. In this embodiment, the second portion 112 forms the integrated oil chamber 130. In other embodiments, the first portion 111 may also form the integrated oil chamber 130. In addition, the shape of the integrated oil cavity 130 can be rectangular, cylindrical, irregular polygonal, etc.

[0066] As described above, the main housing 11 has an integrated oil chamber 130. The integrated main housing 11 also has a first accommodating space and a second accommodating space, so that the integrated oil chamber 130 can communicate with the first accommodating space and the second accommodating space at the same time. Thus, only one integrated oil chamber 130 is set to lubricate the motor body 121 and the reducer body 122, which can reduce the size of the electric drive bridge 10. In addition, it can also reduce the amount of lubricating oil in the electric drive bridge 10.

[0067] Please refer to the following: Figure 4 and Figure 5 , Figure 4 for Figure 3 Enlarged schematic diagram of part of the structure; Figure 5 for Figure 4 A schematic diagram of the intermediate oil baffle assembly. In some embodiments, the electric drive bridge 10 further includes a lubrication assembly (not shown), which is disposed corresponding to the integrated oil chamber 130. The main housing 11 forms an oil passage 131, and the integrated oil chamber 130 communicates with the first accommodating space and the second accommodating space through the oil passage 131. The lubrication assembly includes an oil delivery device disposed in the oil passage 131, and the oil delivery device is configured to deliver oil in the integrated oil chamber 130 to the first accommodating space and the second accommodating space.

[0068] In this embodiment, the oil delivery device is specifically an oil pump. After drawing lubricating oil from the integrated oil chamber 130, the oil pump delivers the lubricating oil through the oil passage 131 to the first and second accommodating spaces. In other embodiments, the oil delivery device can also be a solenoid valve. The integrated oil chamber 130 is positioned above the first and second accommodating spaces in the height direction. By opening and closing the solenoid valve, the lubricating oil in the integrated oil chamber 130 is controlled to flow naturally to the first and second accommodating spaces under gravity, thus achieving quantitative delivery of the lubricating oil. In other embodiments, the lubrication assembly also includes a heating device disposed within the oil passage 131. The heating device heats the lubricating oil to reduce its viscosity, thereby facilitating its transport.

[0069] The above-mentioned lubricating oil can be delivered through the oil delivery device and oil passage 131 to lubricate the motor body 121 and the reducer body 122.

[0070] In some embodiments, the first accommodating space and the second accommodating space are arranged adjacent to each other, the integrated oil cavity 130 is arranged adjacent to the first accommodating space, and the integrated oil cavity 130 is arranged adjacent to the second accommodating space.

[0071] In this embodiment, the integrated oil cavity 130 is located between the first accommodating space and the second accommodating space. The integrated oil cavity 130 is simultaneously adjacent to both the first and second accommodating spaces, which reduces the transport distance of the lubricating oil and facilitates its transport. In some other embodiments, the integrated oil cavity 130 may also be located on the side of the first accommodating space facing away from the second accommodating space. In still some embodiments, the integrated oil cavity 130 may also be located on the side of the second accommodating space facing away from the first accommodating space.

[0072] As mentioned above, the integrated oil cavity 130 is adjacent to both the first accommodating space and the second accommodating space, which can reduce the length of the oil passage 131. In addition, the reduction in the length of the oil passage 131 can further reduce the amount of lubricating oil.

[0073] In some embodiments, the second portion 112 forms an integrated oil cavity 130, the second accommodating space and the integrated oil cavity 130 are located in a first direction a of the first accommodating space, and the integrated oil cavity 130 is located in a second direction b of at least a portion of the second accommodating space, the first direction a being perpendicular to the second direction b.

[0074] In this embodiment, the first direction a is horizontal, and the second direction b is vertical. The first accommodating space and the second accommodating space are arranged adjacent to each other so that they can be connected, thereby enabling the motor body 121 and the reducer body 122 to be connected in transmission. In this embodiment, in order to enable the integrated oil cavity 130 to be adjacent to both the first and second accommodating spaces, the second accommodating space is set to an irregular structure. The second accommodating space includes a first receiving portion and a second receiving portion, which are adjacent to each other. Specifically, the first accommodating space is arranged adjacent to the first receiving portion. In the second direction b, the size of the second receiving portion is smaller than the size of the first receiving portion. The integrated oil cavity 130 is adjacent to the first receiving portion. The integrated oil cavity 130 is located in the first direction a of the first receiving portion and in the second direction b of the second receiving portion. In the first direction a, the integrated oil cavity 130 is also adjacent to the first accommodating space. The above structure enables the first and second accommodating spaces to be adjacent to each other, and also enables the integrated oil cavity 130 to be adjacent to both the first and second accommodating spaces. In addition, in this embodiment, the second part 112 forms an integrated oil cavity 130. In other embodiments, the first part 111 may also form an integrated oil cavity 130.

[0075] The above allows the integrated oil cavity 130 to be adjacent to both the first accommodating space and the second accommodating space simultaneously.

[0076] In some embodiments, the oil passage 131 is parallel to the first direction a.

[0077] The first direction a is horizontal, and the oil passage 131 is parallel to the first direction a, which can reduce the resistance when the oil conveying device conveys oil. In some other embodiments, the oil passage 131 may also be set at an angle to the first direction a.

[0078] As mentioned above, the oil passage 131 is parallel to the first direction a, which can reduce the resistance of the oil conveying device when conveying oil and facilitate oil conveying.

[0079] In some embodiments, the lubrication assembly further includes an oil baffle assembly 140, which is disposed in the oil passage 131 and configured to restrict the flow of lubricating oil from the integrated oil chamber 130.

[0080] In this embodiment, the oil-blocking assembly 140 includes a mounting member 141 and an oil-blocking member 142. The mounting member 141 is fixed to the oil passage 131. The oil-blocking member 142 is pivotally mounted on the mounting member 141. When there is sufficient lubricating oil in the first accommodating space and / or the second accommodating space, the oil-blocking member 142 rotates to prevent lubricating oil from flowing out of the integrated oil chamber 130. The mounting member 141 can be fixed to the oil passage 131 by means of screws, rivets, welding, etc. In this embodiment, the mounting member 141 has a mounting hole 143, and the mounting member 141 is fixed to the oil passage 131 through the mounting hole 143. The oil-blocking member 142 can be mounted on the mounting member 141 by means of pin connection, hinge connection, flexible pivoting, etc. The oil-blocking member 142 is used to prevent a large amount of lubricating oil from flowing into the first accommodating space and the second accommodating space. In one specific embodiment, the oil baffle 142 hangs down naturally under the action of gravity. When the electric drive bridge 10 is not tilted to the left or right, the oil supply device draws in lubricating oil. The lubricating oil pushes the oil baffle 142 to rotate towards the first and second accommodating spaces. The oil baffle 142 rotates until the lubricating oil can normally enter the first and second accommodating spaces through the oil passage 131. When there is sufficient lubricating oil in the first and second accommodating spaces or when the electric drive bridge 10 is tilted to the left or right, the lubricating oil top on the side of the oil baffle 142 in the first and second accommodating spaces abuts against the oil baffle 142, preventing the oil baffle 142 from rotating and blocking the lubricating oil from continuing to enter the first and second accommodating spaces.

[0081] As described above, the oil baffle assembly 140 can restrict the flow of lubricating oil from the integrated oil chamber 130. This reduces the problem of a large amount of lubricating oil flowing into the first and second accommodating spaces when the electric drive bridge 10 tilts left or right.

[0082] In some embodiments, the motor body 121 includes an output shaft 1211; the reducer body 122 includes a transmission shaft 1221, and the first accommodating space and the second accommodating space are connected. The two ends of the output shaft 1211 are rotatably fixed in the first accommodating space via bearings 150, one end of the transmission shaft 1221 is rotatably fixed in the second accommodating space via bearings 150, and the other end of the transmission shaft 1221 is connected to the output shaft 1211 and floats in the second accommodating space; or the two ends of the transmission shaft 1221 are rotatably fixed in the second accommodating space via bearings 150, one end of the output shaft 1211 is rotatably fixed in the first accommodating space via bearings 150, and the other end of the output shaft 1211 is connected to the transmission shaft 1221 and floats in the first accommodating space.

[0083] In related technologies, the reducer and the motor are two independent structures. To fix the reducer's drive shaft 1221 and the motor's output shaft 1211, both ends of the drive shaft 1221 and the output shaft 1211 are rotatably fixed within the housing via bearings 150. In existing technologies, a large number of bearings 150 are used. In this embodiment, the first part 111 and the second part 112 of the main housing 11 are an integrated structure. Both ends of the drive shaft 1221 are rotatably fixed in the second accommodating space via bearings 150, and one end of the output shaft 1211 is rotatably fixed in the first accommodating space via bearings 150. The other end of the output shaft 1211 can be directly connected to the drive shaft 1221. By fixing the other end of the output shaft 1211 with the drive shaft 1221, the bearings 150 can fix the drive shaft 1221 and the output shaft 1211, reducing the number of bearings 150 used and reducing the size and weight of the electric drive bridge 10. Specifically, the drive shaft 1221 and the output shaft 1211 can be connected via a spline drive. In some other embodiments, both ends of the drive shaft 1221 may be fixed by bearings 150, one end of the output shaft 1211 may be fixed by bearings 150, and the other end of the output shaft 1211 may be fixed to the drive shaft 1221.

[0084] As described above, the output shaft 1211 and the transmission shaft 1221 are fixed together by three bearings 150, which reduces the number of bearings 150 used.

[0085] Please refer to the following: Figure 6 , Figure 6 for Figure 2 A schematic diagram of the internal structure of the differential housing in an electric drive axle. In some embodiments, the electric drive axle 10 further includes a differential 160, which includes: an axle housing 161 having a receiving cavity 162; a differential body 163 disposed in the receiving cavity 162 and drively connected to a reducer body 122; and an active lubrication assembly disposed corresponding to the differential body 163 and configured to spray lubricating oil into the receiving cavity 162.

[0086] In this embodiment, the differential body 163 includes left and right half-shafts (not shown). The left and right half-shafts of the differential body 163 are used to connect the left wheel hub 171 and the right wheel hub 172. The differential body 163 is used to enable the left wheel hub 171 and the right wheel hub 172 to rotate at different speeds. The axle housing 161 serves to protect and fix the differential body 163. The axle housing 161 can be made of aluminum alloy, steel, high-strength composite materials, etc. Related technologies propose an electric drive axle 10 for commercial vehicles. In the related technologies, the differential 160 in the electric drive axle 10 of commercial vehicles is lubricated by splash lubrication. Splash lubrication involves immersing the rotating gear 164 of the differential 160 in lubricating oil for lubrication. This lubrication method requires a large amount of lubricating oil and has low lubrication efficiency. In this embodiment, the active lubrication component can draw lubricating oil and spray it onto the differential body 163 in the accommodating cavity 162 for lubrication. This lubrication method requires less lubricating oil and sprays the lubricating oil directly onto the differential body 163, resulting in high lubrication efficiency.

[0087] The above-mentioned differential 160 can adjust the speed difference, so that the left and right wheels can rotate at different speeds.

[0088] Please refer to the following: Figure 7 , Figure 7 for Figure 6 A partially enlarged schematic diagram of the differential. In some embodiments, the differential body 163 includes a rotating gear 164, and the differential 160 also includes an oil baffle 165, which surrounds one or more sides of the rotating gear 164 to reduce oil churning losses when the rotating gear 164 rotates.

[0089] After the active lubrication assembly delivers lubricating oil to the receiving cavity 162, the rotating gear 164 is at least partially immersed in the lubricating oil. When the rotating gear 164 rotates, it is easy to agitate the lubricating oil in the receiving cavity 162, causing splashing. In this embodiment, an oil baffle 165 is provided around the rotating gear 164, so that when the rotating gear 164 rotates, it only agitates the lubricating oil on the side of the oil baffle 165 facing the rotating gear 164, so that the lubricating oil on the side of the oil baffle 165 away from the rotating gear 164 will not be agitated, thereby reducing oil agitation loss.

[0090] As mentioned above, the oil baffle 165 can reduce the oil churning loss when the rotating gear 164 rotates.

[0091] Please refer to the following: Figure 8 and Figure 9 , Figure 8 for Figure 6 Enlarged schematic diagram of another part of the differential structure; Figure 9 for Figure 7An exploded view of the structure of the oil baffle; in some embodiments, the oil baffle 165 is formed with an oil baffle groove, and the rotating gear 164 is at least partially located in the oil baffle groove.

[0092] The rotating gear 164 is at least partially located within the oil-blocking groove, allowing the groove walls to surround multiple sides of the rotating gear 164, thereby reducing oil churning losses. In this embodiment, the bottom of the oil-blocking groove is arc-shaped, and multiple sides of the gear edge of the rotating gear 164 are shielded by the oil-blocking groove. In other embodiments, the rotating gear 164 may be completely located within the oil-blocking groove. In this embodiment, the oil baffle 165 has a groove-like structure; in other embodiments, the oil baffle 165 may also have a plate-like structure.

[0093] As mentioned above, the fact that the rotating gear 164 is at least partially located in the oil baffle groove can reduce the oil churning loss when the rotating gear 164 rotates.

[0094] Please refer to the following: Figure 10 , Figure 10 for Figure 7 A schematic diagram of the oil passage structure on the oil baffle. In some embodiments, the oil baffle groove has one or more oil passage structures 1651 on its groove wall.

[0095] The oil passage structure 1651 can specifically be a through hole or channel formed on the groove wall. The oil passage structure 1651 is used to allow the lubricating oil in the accommodating cavity 162 to enter the oil baffle groove and be sprayed onto the rotating gear 164 for lubrication. In some embodiments, the oil passage structure 1651 is a bent channel. The bent channel allows the lubricating oil to enter the oil baffle groove and also prevents the lubricating oil in the accommodating cavity 162 from being agitated when the rotating gear 164 rotates. There can be one or more oil passage structures 1651. When there are multiple oil passage structures 1651, the multiple oil passage structures 1651 can be located on the same side or different sides of the rotating gear 164.

[0096] As described above, the oil passage structure 1651 allows lubricating oil to enter the oil baffle groove to lubricate the rotating gear 164.

[0097] In some embodiments, the two ends of the differential body 163 are rotatably fixed to the accommodating cavity 162 by bearings 150. The axle housing 161 has bearing lubrication passages 1631, and the active lubrication assembly supplies lubricating oil to the bearings 150 at both ends of the differential body 163 through the bearing lubrication passages 1631. The axle housing 161 also has accommodating cavity lubrication passages 1632, and the active lubrication assembly supplies oil to the accommodating cavity 162 through the accommodating cavity lubrication passages 1632.

[0098] In this embodiment, there are two bearing lubrication channels 1631, each corresponding to a bearing 150 at one end of the differential body 163, to lubricate the two bearings 150 respectively. The active lubrication component specifically uses an oil pump to deliver lubricating oil. In this embodiment, the rotating gear 164 is lubricated by delivering oil to the accommodating cavity 162 via the active lubrication component; this lubrication method is active oil spray lubrication, which provides better lubrication. In some embodiments, the bearing lubrication channels 1631 and the accommodating cavity lubrication channels 1632 are parallel to the first direction a.

[0099] The above-mentioned method can lubricate the differential body 163, and the lubrication is more targeted, with high lubrication efficiency and small amount of lubricating oil.

[0100] In some embodiments, the differential 160 further includes an oil baffle located in the receiving cavity 162.

[0101] After the lubricating oil is delivered to the receiving cavity 162, it will accumulate in the receiving cavity 162. In this embodiment, by setting an oil-blocking block in the receiving cavity 162, the oil-blocking block can occupy the space in the receiving cavity 162, so that a small amount of lubricating oil in the receiving cavity 162 can immerse the rotating gear 164 in the lubricating oil, thereby improving lubrication efficiency. The number of oil-blocking blocks can be one or more, and the oil-blocking blocks can be rectangular, cylindrical, or irregular polygonal, etc. Further, in some embodiments, the oil-blocking block is located on the side of the receiving cavity 162 closer to the ground. It is easy to understand that the lubricating oil will accumulate on the side of the receiving cavity 162 closer to the ground under the action of gravity. Setting the oil-blocking block on the side of the receiving cavity 162 closer to the ground can occupy more space for lubricating oil accumulation and reduce the amount of lubricating oil in the electric drive bridge 10.

[0102] As mentioned above, the oil baffle block installed in the accommodating cavity 162 can reduce the amount of lubricating oil in the accommodating cavity 162.

[0103] Correspondingly, this application also proposes a new energy vehicle, which includes an electric drive axle 10, wherein the electric drive axle 10 is the electric drive axle 10 of any of the above embodiments.

[0104] The aforementioned electric drive bridge 10 has an integrated oil chamber 130 in its main housing 11. The integrated main housing 11 also has a first accommodating space and a second accommodating space, so that the integrated oil chamber 130 can communicate with the first accommodating space and the second accommodating space at the same time. Thus, only one integrated oil chamber 130 is needed to lubricate the motor body 121 and the reducer body 122, which can reduce the size of the electric drive bridge 10. In addition, it can also reduce the amount of lubricating oil in the electric drive bridge 10.

[0105] Finally, in a specific application scenario, addressing the technical problems of large size and large lubricating oil volume in existing electric drive bridges 10, the electric drive bridge 10 of this application includes a main housing 11, a motor body 121, and a reducer body 122. The main housing 11 includes a first part 111 and a second part 112, which are an integrated structure. The first part 111 has a first accommodating space, and the second part 112 has a second accommodating space. The first part 111 or the second part 112 also forms an integrated oil chamber 130, which communicates with both the first and second accommodating spaces. The motor body 121 is located in the first accommodating space, and the reducer body 122 is located in the second accommodating space, with the reducer body 122 being drive-connected to the motor body 121. The electric drive bridge 10 also includes a lubrication assembly, which is disposed corresponding to the integrated oil cavity 130. The main housing 11 forms an oil passage 131, through which the integrated oil cavity 130 communicates with the first accommodating space and the second accommodating space. The lubrication assembly includes an oil delivery device disposed in the oil passage 131, configured to deliver oil from the integrated oil cavity 130 to the first accommodating space and the second accommodating space. The first accommodating space and the second accommodating space are arranged adjacent to each other, and the integrated oil cavity 130 is arranged adjacent to both the first and second accommodating spaces. The second portion 112 forms the integrated oil cavity 130. The second accommodating space and the integrated oil cavity 130 are located in a first direction a of the first accommodating space, and the integrated oil cavity 130 is located in a second direction b of at least a portion of the second accommodating space. The first direction a is perpendicular to the second direction b. The lubrication assembly also includes an oil baffle assembly 140, which is disposed in the oil passage 131 and configured to restrict the flow of lubricating oil from the integrated oil chamber 130. The oil baffle assembly 140 includes a mounting member 141 and an oil baffle member 142. The mounting member 141 is fixed to the oil passage 131; the oil baffle member 142 is pivotally mounted on the mounting member 141. When there is sufficient lubricating oil in the first accommodating space and / or the second accommodating space, the oil baffle member 142 rotates to prevent lubricating oil from flowing out of the integrated oil chamber 130. The motor body 121 includes an output shaft 1211; the reducer body 122 includes a drive shaft 1221. A first accommodating space and a second accommodating space are connected. Both ends of the drive shaft 1221 are rotatably fixed in the second accommodating space via bearings 150. One end of the output shaft 1211 is rotatably fixed in the first accommodating space via bearings 150. The other end of the output shaft 1211 is drive-connected to the drive shaft 1221 and floats supported in the first accommodating space. The output shaft 1211 and the drive shaft 1221 are connected via a spline drive.The electric drive axle 10 also includes a differential 160, which includes an axle housing 161 having a receiving cavity 162; a differential body 163 is disposed in the receiving cavity 162, and the differential body 163 is drively connected to a reducer body 122; an active lubrication component is disposed corresponding to the differential body 163, and the active lubrication component is configured to spray lubricating oil into the receiving cavity 162. The differential body 163 includes a rotating gear 164, and the differential 160 also includes an oil baffle 165, which surrounds one or more sides of the rotating gear 164 to reduce oil churning losses when the rotating gear 164 rotates. The oil baffle 165 forms an oil baffle groove, and the rotating gear 164 is at least partially located in the oil baffle groove. The differential 160 also includes an oil baffle block located in the receiving cavity 162.

[0106] In the above manner, the main housing 11 has an integrated oil cavity 130. The integrated main housing 11 also has a first accommodating space and a second accommodating space, so that the integrated oil cavity 130 can be connected to the first accommodating space and the second accommodating space at the same time. Thus, only one integrated oil cavity 130 is set to lubricate the motor body 121 and the reducer body 122, which can reduce the size of the electric drive bridge 10. In addition, it can also reduce the amount of lubricating oil in the electric drive bridge 10.

[0107] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. An electric drive bridge, characterized in that, The electric drive bridge includes: The main housing includes a first part and a second part, which are integral structures. The first part has a first accommodating space, and the second part has a second accommodating space. The first part or the second part further forms an integrated oil cavity, which is connected to the first accommodating space and the second accommodating space. The motor body is disposed in the first accommodating space; The reducer body is located in the second accommodating space and is connected to the motor body for transmission.

2. The electric drive bridge according to claim 1, characterized in that, The electric drive bridge also includes: A lubrication assembly is provided corresponding to the integrated oil cavity. The main housing has an oil passage, and the integrated oil cavity is connected to the first accommodating space and the second accommodating space through the oil passage. The lubrication assembly includes: An oil delivery device is provided in the oil passage and is configured to deliver oil from the integrated oil chamber to the first accommodating space and the second accommodating space.

3. The electric drive bridge according to claim 2, characterized in that, The first accommodating space and the second accommodating space are arranged adjacent to each other, the integrated oil cavity is arranged adjacent to the first accommodating space, and the integrated oil cavity is arranged adjacent to the second accommodating space.

4. The electric drive bridge according to claim 3, characterized in that, The second part forms the integrated oil cavity. The second accommodating space and the integrated oil cavity are located in a first direction of the first accommodating space, and the integrated oil cavity is located in a second direction of at least a portion of the second accommodating space, wherein the first direction is perpendicular to the second direction.

5. The electric drive bridge according to claim 4, characterized in that, The oil passage is parallel to the first direction.

6. The electric drive bridge according to claim 2, characterized in that, The lubrication assembly also includes: An oil baffle assembly is disposed in the oil passage and configured to restrict the flow of lubricating oil from the integrated oil chamber.

7. The electric drive bridge according to claim 6, characterized in that, The oil baffle assembly includes: Mounting component, the mounting component being fixed to the oil passage; An oil baffle is pivotally mounted on the mounting member. When there is sufficient lubricating oil in the first accommodating space and / or the second accommodating space, the oil baffle rotates to prevent lubricating oil from flowing out of the integrated oil cavity.

8. The electric drive bridge according to claim 1, characterized in that, The motor body includes an output shaft; The reducer body includes a drive shaft, the first accommodating space and the second accommodating space are connected, wherein both ends of the output shaft are rotatably fixed to the first accommodating space by bearings, one end of the drive shaft is rotatably fixed to the second accommodating space by bearings, and the other end of the drive shaft is drivenly connected to the output shaft and floats and is supported in the second accommodating space; or both ends of the drive shaft are rotatably fixed to the second accommodating space by bearings, one end of the output shaft is rotatably fixed to the first accommodating space by bearings, and the other end of the output shaft is drivenly connected to the drive shaft and floats and is supported in the first accommodating space.

9. The electric drive bridge according to claim 8, characterized in that, The output shaft and the drive shaft are connected by a spline drive.

10. The electric drive bridge according to claim 1, characterized in that, The electric drive axle also includes a differential, which comprises: Bridge housing, the bridge housing having a receiving cavity; A differential body is disposed in the accommodating cavity, and the differential body is drively connected to the reducer body; An active lubrication assembly is provided corresponding to the differential body and is configured to spray lubricating oil into the accommodating cavity.

11. The electric drive bridge according to claim 10, characterized in that, The differential body includes a rotating gear, and the differential also includes an oil baffle, which is arranged around one or more sides of the rotating gear to reduce oil churning loss when the rotating gear rotates.

12. The electric drive bridge according to claim 11, characterized in that, The oil baffle has an oil baffle groove, and the rotating gear is at least partially located within the oil baffle groove.

13. The electric drive bridge according to claim 12, characterized in that, The oil-blocking groove has one or more oil-passing structures on its groove wall.

14. The electric drive bridge according to claim 10, characterized in that, The two ends of the differential body are rotatably fixed in the accommodating cavity by bearings. The axle housing has bearing lubrication oil passages, and the active lubrication component supplies lubricating oil to the bearings at both ends of the differential body through the bearing lubrication oil passages. The axle housing also has accommodating cavity lubrication oil passages, and the active lubrication component supplies oil to the accommodating cavity through the accommodating cavity lubrication oil passages.

15. The electric drive bridge according to claim 14, characterized in that, The differential also includes: An oil baffle block is located in the accommodating cavity.

16. The electric drive bridge according to claim 15, characterized in that, The oil baffle is located on the side of the accommodating cavity facing the ground.

17. A new energy vehicle, characterized in that, The new energy vehicle includes the electric drive axle as described in any one of claims 1-16.

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