Drive axle assembly and vehicle

Abstract

A vehicle, comprising a drive axle assembly (10), wherein the drive axle assembly (10) comprises a prime mover member (101), a primary transmission member (102), a secondary transmission member (103), and a tertiary transmission member (104) which sequentially constitute power coupling. A plane where a primary axis (102a) and a tertiary axis (104a) are located is defined as a reference plane (S); a prime-mover axis (101a) is arranged on one side of the reference plane (S) and is parallel to the reference plane (S); and when the prime mover member (101) rotates about the prime-mover axis (101a), the primary transmission member (102) is driven to rotate about the primary axis (102a), and the secondary transmission member (103) rotates about a secondary axis (103a) along with the primary transmission member (102). The prime mover member (101), the primary transmission member (102), the secondary transmission member (103), and the tertiary transmission member (104) are compactly arranged, so that the drive axle assembly (10) has a compact structure and a small size, and the internal space of the vehicle occupied by the drive axle assembly (10) can be effectively saved.

Description

Drive axle assembly and vehicle

[0001] This application claims priority to Chinese Patent Application No. 2024109044051, filed on July 8, 2024, entitled “Drive Axle Assembly and Vehicle”, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to, but is not limited to, the field of vehicle power drive technology, specifically to a drive axle assembly and a vehicle. Background Technology

[0003] Electric drive axles are receiving increasing attention as an important new energy vehicle technology. Compared to traditional fuel vehicles, electric drive axles have better emissions performance.

[0004] In the existing technology, the motor drive axle of vehicles (such as forklifts) mostly adopts the following two methods: the first is a three-stage parallel arrangement of the central reduction assembly; the second is a combination of two-stage central reduction and a third-stage wheel-side reduction.

[0005] In related technologies, the three-stage reduction drive axle on a vehicle occupies a large space, which is not conducive to the overall vehicle layout. Summary of the Invention

[0006] This application provides a drive axle assembly and vehicle, which helps to improve the overall vehicle layout and at least partially solve the above-mentioned technical problems.

[0007] To achieve the above objectives, according to a first aspect of this application, a drive axle assembly is provided, comprising:

[0008] The driving element rotates about the driving axis;

[0009] The primary transmission component rotates around the primary axis.

[0010] The secondary transmission component rotates around the secondary axis;

[0011] Three-stage transmission components rotate around a three-stage axis;

[0012] Wherein, the prime mover, the first-stage transmission member, the second-stage transmission member, and the third-stage transmission member sequentially constitute a power coupling so that the third-stage transmission member has at least a preset reduction ratio relative to the prime mover;

[0013] The plane containing the primary axis and the tertiary axis is defined as the reference plane, and the driving axis is set on one side of the reference plane and parallel to it.

[0014] In some embodiments of this application, the secondary axis is disposed within the reference plane.

[0015] In some embodiments of this application, the line connecting the projection points of the prime mover axis, the primary axis, and the secondary axis in a projection plane perpendicular to the reference plane is a triangle;

[0016] The maximum angle of the triangle is less than or equal to 90 degrees.

[0017] In some embodiments of this application, the triangle is an acute triangle.

[0018] In some embodiments of this application, the two power coupling points between the primary transmission component, the secondary transmission component, and the tertiary transmission component are located on the reference plane.

[0019] In some embodiments of this application, at least one of the prime mover, the first-stage transmission member, the second-stage transmission member, and the third-stage transmission member is configured to have a gear structure.

[0020] In some embodiments of this application, the preset reduction ratio is greater than or equal to 40.

[0021] In some embodiments of this application, the angular acceleration impact of the three-stage transmission component ranges from 0.1 to 1.49 mm / s². 2 .

[0022] In some embodiments of this application, it further includes: a brake disc, which forms an anti-rotation connection with one of the primary transmission member, the secondary transmission member, and the tertiary transmission member; and a brake, used to engage or release the brake disc.

[0023] In some embodiments of this application, the drive axle assembly further includes:

[0024] The housing has an internal cavity that at least accommodates the prime mover;

[0025] The inner side of the housing has an oil guide groove that guides lubricating oil from the primary transmission component to the prime mover; the oil guide groove is located on the inner wall of the housing surrounding the primary transmission component.

[0026] In some embodiments of this application, the drive axle assembly further includes: a housing having an inner cavity that accommodates at least the prime mover; and an oil baffle disposed in the inner cavity and surrounding the primary drive member to stop lubricating oil splashed from the prime mover to the primary drive member along the direction of the prime mover axis.

[0027] In some embodiments of this application, the oil baffle includes:

[0028] The oil-blocking body has a first part that is arc-shaped like a hook and a second part that is arc-shaped.

[0029] In some embodiments of this application, the drive axle assembly further includes:

[0030] The housing has an internal cavity that accommodates at least a portion of the three-stage transmission components;

[0031] A bridge housing is connected to the housing, and the bridge housing has a receiving cavity for accommodating at least a portion of the three-stage transmission components;

[0032] The inner cavity of the box is connected to the receiving cavity.

[0033] In some embodiments of this application, the drive axle assembly further includes a differential, located within the receiving cavity, and connected to the three-stage transmission component.

[0034] According to a second aspect of this application, a vehicle is provided, including a drive axle assembly, said drive axle assembly being the drive axle assembly described above.

[0035] The advantage of this application is that it provides a vehicle that facilitates overall vehicle layout through a compact arrangement of the drive axle assembly.

[0036] More specifically, some embodiments of this application may produce the following specific beneficial effects:

[0037] In the drive axle assembly of this application embodiment, a prime mover, a primary transmission component, a secondary transmission component, and a tertiary transmission component sequentially constitute a power coupling. The prime mover rotates around its prime drive axis, the primary transmission component rotates around its primary axis, the secondary transmission component rotates around its secondary axis, and the tertiary transmission component rotates around its tertiary axis. After connection, the tertiary transmission component has at least a preset reduction ratio relative to the prime mover. The plane containing the primary and tertiary axes is defined as a reference plane. The prime drive axis is set on one side of the reference plane and parallel to it. When the prime mover rotates around its prime drive axis, it drives the primary transmission component to rotate around its primary axis, and the secondary transmission component rotates with the primary transmission component around its secondary axis. Through the above technical solution, the prime mover, primary transmission component, secondary transmission component, and tertiary transmission component are arranged compactly, making the drive axle assembly compact in structure and small in size. This effectively saves the space occupied by the drive axle assembly in the vehicle interior and facilitates the subsequent overall vehicle layout.

[0038] Other features and advantages of this application will be described in detail in the following detailed description section. 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 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] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0041] Figure 1 is a schematic diagram of the overall structure of the three-stage transmission component, brake, brake disc and differential provided in an exemplary embodiment of this application.

[0042] Figure 2 is a side view of Figure 1 provided in an exemplary embodiment of this application;

[0043] Figure 3 is an exploded structural diagram of the drive axle assembly provided in an exemplary embodiment of this application;

[0044] Figure 4 is a schematic diagram of the connection between the prime mover, the first-stage transmission component, the second-stage transmission component and the third-stage transmission component provided in the exemplary embodiment of this application, which are sequentially configured to form a power coupling and a differential.

[0045] Figure 5 is a cross-sectional structural diagram provided in an exemplary embodiment of this application;

[0046] Figure 6 is a side view provided in an exemplary embodiment of this application;

[0047] Figure 7 is a schematic diagram of the structure of the oil baffle in an exemplary embodiment of this application;

[0048] Figure 8 is a schematic diagram of the trajectory of oil splashing in an exemplary embodiment of this application;

[0049] Figure 9 is a schematic diagram of the meshing force between the first-stage transmission component, the second-stage transmission component and the third-stage transmission component in an exemplary embodiment of this application.

[0050] Figure 10 is a schematic diagram of the location structure of the oil guide groove opened on the inner wall of the box in an exemplary embodiment of this application;

[0051] Figure 11 is a schematic diagram of the drive axle assembly provided in an exemplary embodiment of this application;

[0052] Figure 12 is a schematic diagram of the kinematic simulation effect of an exemplary embodiment of this application.

[0053] Explanation of reference numerals in the attached drawings: 10. Drive axle assembly; 101. Prime mover; 101a. Prime mover shaft; 1011. Prime mover gear; 1012. Prime mover shaft; 102. First-stage transmission component; 102a. First-stage shaft; 1021. First-stage drive gear; 1022. First-stage driven gear; 1023. First-stage shaft; 103. Second-stage transmission component; 103a. Second-stage shaft; 1031. Second-stage drive gear; 1032. Second-stage driven gear; 1033. Second-stage shaft; 104. Third-stage transmission component; 104a. Third-stage shaft; 1041. Third-stage transmission gear; 105. Brake disc; 106. Brake; 107. Housing; 107a. Housing cavity; 107b. Oil guide groove; 1071. Mounting boss; 1072. Housing cover; 1073. Housing body; 108. Oil baffle; 108a. Mounting hole; 1081. Oil baffle body; 109. Motor; 110. Differential; 111. Axle housing; S. Reference plane. Detailed Implementation

[0054] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0055] For ease of explanation, the corresponding figures use the directions of up, down, left, right, front, and back to illustrate the relative positional relationships between the parts in this application. These should not be construed as limitations on absolute positions.

[0056] Furthermore, in this application, the first direction corresponds to the up and down direction. As above, the first direction here indicates the up and down direction only for the convenience of introducing the specific embodiments of this application. There is no absolute correspondence between the first direction and the up and down direction.

[0057] The first orientation in this application is only for expressing relative positional relationships; they merely indicate approximate directions, not absolute geometric relationships.

[0058] According to a first aspect of this application, referring to Figures 3, 4 and 11, a drive axle assembly 10 is provided. The drive axle assembly 10 includes a prime mover 101, a primary transmission member 102, a secondary transmission member 103 and a tertiary transmission member 104. The prime mover 101 is rotatable about a prime drive axis 101a, the primary transmission member 102 is rotatable about a primary axis 102a, the secondary transmission member 103 is rotatable about a secondary axis 103a, and the tertiary transmission member 104 is rotatable about a tertiary axis 104a.

[0059] At the same time, the prime mover 101, the first-stage transmission 102, the second-stage transmission 103 and the third-stage transmission 104 are sequentially connected to form a power coupling, which realizes that the third-stage transmission 104 has at least a preset reduction ratio relative to the prime mover 101, and completes the deceleration of the third-stage transmission 104 relative to the prime mover 101.

[0060] The plane containing the primary axis 102a and the tertiary axis 104a is defined as the reference plane S. The driving axis 101a is set on one side of the reference plane S and parallel to it. That is, the driving axis 101a is parallel to the reference plane S, and the driving member 101 is located between the primary transmission member 102 and the secondary transmission member 103.

[0061] The prime mover 101 is subjected to a force applied by the drive component. Under the action of the force, the prime mover 101 can rotate around the prime drive axis 101a, thereby driving the first-stage transmission component 102 to rotate around the first-stage axis 102a, the second-stage transmission component 103 to rotate around the second-stage axis 103a, and the third-stage transmission component 104 to rotate around the third-stage axis 104a. After the force on the prime mover 101 is transmitted through the first-stage transmission component 102 and the second-stage transmission component 103, the speed is changed from large to small. The prime mover 101 is located between the first-stage transmission component 102 and the second-stage transmission component 103. The overall structure is compact, which makes the entire transmission part occupy a smaller volume, thereby achieving the effect of saving space in the drive axle. Moreover, during the deceleration process, each component can be more stable, realizing stable torque transmission, which is beneficial to the overall vehicle layout.

[0062] In some embodiments, the secondary axis 103a is set in the reference plane S, and the line connecting the projection points of the prime mover axis 101a, the primary axis 102a and the secondary axis 103a in the projection plane perpendicular to the reference plane S forms a triangle, with the maximum angle of the triangle being less than or equal to 90 degrees, and the maximum angle of the triangle being in the range of 10-90 degrees.

[0063] In some embodiments, referring to Figures 6 and 9, the triangle is an acute triangle.

[0064] The acute-angled triangle connecting the projection points of the prime mover axis 101a, the first-stage axis 102a, and the second-stage axis 103a on a projection plane perpendicular to the reference plane S allows for the minimization of the overall size of the drive axle while providing a large reduction ratio. This acute-angled triangle arrangement allows for the placement of a third-stage reducer within the space occupied by a two-stage reducer, resulting in a more compact structure and easier vehicle layout. Furthermore, the force between the prime mover 101 and the second-stage transmission component 103 can balance the force between the third-stage transmission component 104 and the second-stage transmission component 103, reducing the mechanical impact generated by the power coupling between the transmission components. This improves the service life of the drive axle and reduces noise caused by power coupling. It also prevents vibration of the drive components during transmission, thus ensuring a more stable transmission process.

[0065] In some embodiments, the two power coupling points between the primary transmission member 102, the secondary transmission member 103, and the tertiary transmission member 104 are located within the reference plane S, which can further improve the arrangement structure between the transmission members.

[0066] In some embodiments, at least one of the prime mover 101, primary transmission member 102, secondary transmission member 103 and tertiary transmission member 104 is configured to have a gear structure, and the transmission method between the gear structures facilitates installation and maintenance.

[0067] Referring to Figures 1 to 4, the driving element 101, the first-stage transmission element 102, the second-stage transmission element 103, and the third-stage transmission element 104 are all constructed as gear structures, and are constructed as spur gears.

[0068] As an alternative, it can also be constructed as a bevel gear, helical gear, or other type of gear, as long as the meshing transmission relationship is satisfied; no specific limitations are made here.

[0069] The driving element 101 includes a driving shaft and a driving gear 1011, with the central axis of the driving shaft being the driving axis 101a. The first-stage transmission element 102 includes a first-stage rotating shaft 1023, a first-stage driving gear 1021, and a first-stage driven gear 1022, with the first-stage axis 102a being the central axis of the first-stage rotating shaft 1023. The second-stage transmission element 103 includes a second-stage rotating shaft 1033, a second-stage driving gear 1031, and a second-stage driven gear 1032, with the second-stage axis 103a being the central axis of the second-stage rotating shaft 1033. The third-stage transmission element 104 includes a third-stage transmission gear 1041, with the third-stage axis 104a being the central axis of the third-stage gear.

[0070] The driving element 101 meshes with the first-stage driving gear 1021, and the meshing point is defined as the first meshing point. The first-stage driven gear 1022 meshes with the second-stage driving gear 1031, and the meshing point is defined as the second meshing point. The second-stage driven gear 1032 meshes with the third-stage transmission gear 1041, and the meshing point is defined as the third meshing point.

[0071] The second and third meshing points are located in the reference plane S formed by the primary axis 102a and the tertiary axis 104a. The tangent at the first meshing point is the gear force, defined as the first meshing force F1, which is directed toward the third meshing point. The gear force at the tangent at the second meshing point is defined as the second meshing force F2, and the gear force at the tangent at the third meshing point is defined as the third meshing force F3. There is an angle between the first meshing force F1 and the third meshing force F3.

[0072] Referring to Figure 4, in an optional scheme, the tip circle diameter of the driving gear 1011 is set to be smaller than the tip circle diameter of the first-stage driving gear 1021, the tip circle diameter of the first-stage driving gear 1021 is larger than the tip circle diameter of the first-stage driven gear, the tip circle diameter of the second-stage driving gear 1031 is larger than the tip circle diameter of the first-stage driven gear 1022, the tip circle diameter of the second-stage driving gear 1031 is also larger than the tip circle diameter of the second-stage driven gear 1032, and the tip circle diameter of the second-stage driven gear 1032 is smaller than the tip circle diameter of the third-stage transmission gear 1041.

[0073] In some embodiments, the tip circle diameter of the first driven gear is set to be smaller than the tip circle diameter of the second driven gear 1032, and the tip circle diameter of the third-stage transmission gear 1041 is larger than the tip circle diameter of the second-stage driving gear 1031.

[0074] Therefore, it can be deduced that the tip circle diameter of the third-stage transmission gear 1041 is greater than that of the second-stage driving gear 1031, which is greater than that of the first-stage driving gear 1021, which is greater than that of the second-stage driven gear 1032, which is greater than that of the first-stage driven gear 1022, which is greater than that of the prime mover gear 1011.

[0075] By setting the tip circle diameter of each gear as described above, the structure is made even more compact.

[0076] To create an angle between the first meshing force F1 and the third meshing force F3, referring to Figure 8, the first meshing force F1 can be oriented towards the third meshing point. This allows the first meshing force F1 to have a second meshing component F1' pointing downwards in the first direction. The second meshing force F2 is also oriented downwards in the first direction, and the third meshing force F3 is oriented upwards in the first direction. In the first direction, the resultant force of the second meshing component F1' and the second meshing force F2 can be balanced with the third meshing force F3, ensuring the stability of the drive axle in the first direction.

[0077] In some embodiments, all the meshing points of two meshing gears form a line, that is, line contact.

[0078] In some embodiments, the preset reduction ratio can be greater than or equal to 40, which can be applied to special vehicles, such as forklifts and trucks.

[0079] In some embodiments, with the secondary axis 103a located in the reference plane S formed by the primary axis 102a and the tertiary axis 104a, and the prime mover 101 located between the primary transmission member 102 and the secondary transmission member 103, the reduction ratio is set to 45.29 by setting the gear parameters. This results in a better reduction ratio, a more stable structure, and better performance.

[0080] In some embodiments, the angular acceleration impact of the three-stage transmission component 104 ranges from 0.1 to 1.49 mm / s². 2 .

[0081] In the optional scheme, the angular acceleration impact of the three-stage transmission component 104 is set to 0.22 mm / s². 2 The gear transmission angular velocity impact is less than 1.5 mm / s. 2 Requirements.

[0082] Referring to Figure 12, the angular acceleration impact value of the three-stage transmission component 104 is taken as 0.22 mm / s. 2 At this time, the motion effect of the three-stage transmission gear is the best.

[0083] In some embodiments, the drive axle assembly 10 further includes a brake disc 105 and a brake 106.

[0084] In some embodiments, the brake disc 105 is connected to one of the primary transmission member 102, the secondary transmission member 103 and the tertiary transmission member 104 to prevent rotation, and the brake 106 is used to engage or release the brake disc 105.

[0085] Referring to Figure 1, in some embodiments, the brake disc 105 is anti-rotatingly connected to the primary transmission member 102, and the brake 106 is a parking brake 106.

[0086] In some embodiments, the parking brake 106 is a normally closed parking brake 106, which has a larger parking torque, is simpler to operate, and has a more flexible spatial layout.

[0087] In an alternative embodiment, the prime mover 101, the first-stage transmission member 102, and the second-stage transmission member 103 are all placed inside the housing cavity 107a, and part of the third-stage transmission member 104 is located inside the housing cavity 107a and part is located outside the housing cavity 107a.

[0088] The housing 107 includes a housing body 1073 and a housing cover 1072. The housing cover 1072 is placed on the housing body 1073 to form an inner cavity 107a. A portion of the prime mover shaft, the first-stage rotating shaft 1023, the second-stage rotating shaft 1033, and the third-stage rotating shaft are rotatably connected to the housing body 1073 and the housing cover 1072.

[0089] The drive unit uses a motor 109, which is connected to the original rotating shaft 1012 via a spline connection. The connecting flange on the brake 106 is connected to the first-stage rotating shaft 1023 via a spline connection, and the brake disc 105 is bolted to the connecting flange of the brake 106.

[0090] In some embodiments, the drive axle assembly 10 further includes an oil baffle 108, which is disposed in the housing cavity 107a and surrounds the primary drive member 102 to stop lubricating oil splashed from the prime mover 101 to the primary drive member 102 along the direction of the prime mover axis 101a.

[0091] Referring to Figures 3 and 10, a mounting boss 1071 is installed around the first-stage transmission component 102 on the inner side of the housing 107. A mounting hole is made on the mounting boss 1071, and a corresponding hole is made on the oil baffle 108. Bolts are used to connect the hole on the oil baffle 108 and the mounting hole on the mounting boss 1071, thereby mounting the oil baffle 108 on the inner wall of the housing 107 via the mounting boss 1071.

[0092] The oil baffle 108 can block the oil flowing from the prime mover 101 to the primary drive gear 1021 of the primary transmission member 102. After being stopped and reflected by the oil baffle 108, more oil will fall onto the meshing point between the prime mover 101 and the primary drive gear 1021, thereby improving the lubrication effect.

[0093] Referring to Figure 7, the oil baffle 108 includes an oil baffle body. The first part of the oil baffle body is in the shape of an arc hook, and the second part is in the shape of a circular arc. The two ends are smoothly transitioned. The first part of the arc hook is correspondingly set at the first-stage drive gear 1021 of the first-stage transmission component 102. The second part of the circular arc surrounds the driving component 101 of the first part, and the first part of the circular arc is connected to the mounting boss.

[0094] The inner wall of the mounting boss 1071 surrounding the first-stage drive gear 1021 is designed to be arc-shaped, and the center of the arc is concentric with the first-stage drive gear 1021. This allows for the directional guidance of as much oil as possible that is splashed back to the meshing point between the prime mover gear 1011 and the first-stage drive gear 1021.

[0095] The term "oil" can refer to lubricating oil or other types of oil; it is a general term and this application does not impose any specific limitations.

[0096] In some embodiments, to further improve the lubrication effect, referring to FIG7, an oil guide groove 107b can be formed on the inner side of the housing 107 to guide the lubricating oil from the primary transmission member 102 to the prime mover 101. The oil guide groove 107b is used to guide the lubricating oil from the primary transmission member 102 to the prime mover 101, and the oil guide groove 107b is disposed on the inner side of the housing 107 surrounding the inner wall of the primary transmission member 102.

[0097] The oil ejected from the meshing point of the prime mover gear 1011 and the first-stage drive gear 1021 can splash along the oil guide groove 107b onto the meshing position of the prime mover gear 1011 and the first-stage drive gear 1021, providing sufficient lubrication and cooling for the gears; at the same time, after passing through the first-stage rotating shaft 1023, the oil splashes again onto the second-stage driven gear 1032 and the third-stage transmission gear 1041, providing lubrication for the second-stage driven gear 1032 and the third-stage transmission gear 1041, with good lubrication effect, ensuring smooth transmission.

[0098] In some embodiments, the drive axle assembly 10 further includes an axle housing 111 and a differential 110. The axle housing 111 is connected to the housing body 1073 of the housing 107, and the axle housing 111 has a receiving cavity communicating with the housing cavity 107a. The differential 110 is disposed in the receiving cavity, and the differential 110 is connected to the three-stage transmission member 104.

[0099] In some embodiments, a portion of the teeth of the third-stage transmission member 104 is disposed within the housing body 1073 and meshes with the second-stage driven gear 1032 of the second-stage transmission member 103, while the other portion is located within the receiving cavity of the axle housing 111.

[0100] According to a second aspect of this application, a vehicle is provided, including a drive axle assembly 10, wherein the drive axle assembly 10 is the drive axle assembly 10 described above.

[0101] Since the vehicle includes the drive axle assembly 10, it has all the beneficial effects of the drive axle assembly 10. Furthermore, because the overall structure of the drive axle assembly is more compact and smaller in size, it reduces the space occupied by the entire vehicle and is beneficial to the overall vehicle layout.

[0102] The vehicle may be a hybrid vehicle or a new energy vehicle, or it may be a special vehicle, such as a forklift; this application does not specifically limit this.

[0103] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0104] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0105] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0106] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Although the descriptions of each embodiment in this application have different focuses, and parts not described in detail in a certain embodiment can be referred to the relevant descriptions of other embodiments, any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of this application without departing from the content of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A drive axle assembly, comprising: The driving element rotates about the driving axis; The primary transmission component rotates around the primary axis. The secondary transmission component rotates around the secondary axis; as well as Three-stage transmission components, rotating around a three-stage axis; The prime mover, the first-stage transmission member, the second-stage transmission member, and the third-stage transmission member sequentially constitute a power coupling, so that the third-stage transmission member has at least a preset reduction ratio relative to the prime mover; The plane containing the primary axis and the tertiary axis is defined as the reference plane, and the driving axis is set on one side of the reference plane and parallel to it.

2. The drive axle assembly according to claim 1, wherein, The secondary axis is set within the reference plane.

3. The drive axle assembly according to claim 1 or 2, wherein, The line connecting the projection points of the prime mover axis, the first-level axis, and the second-level axis in a projection plane perpendicular to the reference plane forms a triangle; The maximum angle of the triangle is less than or equal to 90 degrees.

4. The drive axle assembly according to claim 3, wherein, The triangle is an acute triangle.

5. The drive axle assembly according to any one of claims 1 to 4, wherein, The two power coupling points between the primary transmission component, the secondary transmission component, and the tertiary transmission component are located on the reference plane.

6. The drive axle assembly according to any one of claims 1 to 5, wherein, At least one of the prime mover, the first-stage transmission member, the second-stage transmission member, and the third-stage transmission member is configured to have a gear structure.

7. The drive axle assembly according to any one of claims 1 to 6, wherein, The preset reduction ratio is greater than or equal to 40.

8. The drive axle assembly according to any one of claims 1 to 7, wherein, The angular acceleration impact value of the three-stage transmission component ranges from 0.1 to 1.49 mm / s².

9. The drive axle assembly according to any one of claims 1 to 8, wherein, The drive axle assembly also includes: The brake disc is connected to one of the primary transmission component, the secondary transmission component, and the tertiary transmission component to prevent rotation. A brake, used to engage or disengage the brake disc.

10. The drive axle assembly according to any one of claims 1 to 9, wherein, Also includes: The housing has an internal cavity that at least accommodates the prime mover; An oil guide groove is formed on the inner side of the housing, which guides lubricating oil from the primary transmission component to the prime mover. The oil guide groove is located on the inner wall of the housing, surrounding the primary transmission component.

11. The drive axle assembly according to any one of claims 1 to 10, wherein, Also includes: The housing has an internal cavity that at least accommodates the prime mover; An oil baffle is disposed in the inner cavity of the housing and surrounds the primary transmission component to stop lubricating oil from splashing from the primary transmission component to the primary transmission component along the direction of the prime mover axis.

12. The drive axle assembly according to claim 11, wherein, The oil baffle includes: The oil-blocking body has a first part that is arc-shaped like a hook and a second part that is arc-shaped.

13. The drive axle assembly according to any one of claims 1 to 5, wherein, Also includes: The housing has an internal cavity that accommodates at least a portion of the three-stage transmission components; A bridge housing is connected to the housing, and the bridge housing has a receiving cavity for accommodating at least a portion of the three-stage transmission components; The inner cavity of the box is connected to the receiving cavity.

14. The drive axle assembly according to claim 13, further comprising: The differential is located within the receiving cavity and is connected to the three-stage transmission component.

15. A vehicle comprising a drive axle assembly, said drive axle assembly being the drive axle assembly as claimed in any one of claims 1-14.

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