A full-floating wheel end coaxial electric drive axle

Abstract

The utility model discloses a full floating formula wheel end coaxial electric drive axle, this axle aims at solving the deficiency of traditional axle in space utilization, support stability and transmission efficiency etc.

Description

Technical Field

[0001] This utility model belongs to the technical field of automotive parts, specifically relating to a fully floating wheel-end coaxial electric drive axle. Background Technology

[0002] Traditional drive axles are divided into fully floating and semi-floating wheel end structures. Electric drive axles currently have coaxial and parallel shaft structures. At present, only the combination of semi-floating wheel ends and coaxial electric axles is used. Fully floating wheel ends have not yet been applied to coaxial electric drive axles. This invention combines fully floating wheel ends with coaxial gearbox transmission structures, making the application scenarios more extensive and the transmission and load-bearing performance higher.

[0003] However, existing fully floating wheel ends are mostly used in traditional axles. Currently, the integration of electric axles is also applied to semi-floating wheel ends. The semi-floating wheel end's half-shaft structure bears both torque and bending moment. Therefore, with the increasing popularity of electrification and the continuous improvement of application environment and torque, the semi-floating wheel end structure faces increasing challenges. Utility Model Content

[0004] The purpose of this invention is to provide a fully floating wheel-end coaxial electric drive axle to solve the problems mentioned in the background art, which are mostly used in traditional axles. Currently, electric axle integration is also applied to semi-floating wheel ends. The semi-floating wheel end's half-shaft structure bears both torque and bending moment. Therefore, with the increasing popularity of electrification and the continuous improvement of application environment and torque, the semi-floating wheel end structure faces increasingly greater challenges.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a fully floating wheel-end coaxial electric drive axle, comprising a wheel-end coaxial electric drive axle body;

[0006] A main shaft is provided at the middle position inside the main body of the coaxial electric drive axle at the wheel end, a wheel hub is provided at the outer position of the main shaft, and a spline is provided at the bottom position of the main shaft;

[0007] A half-shaft is provided inside the main body of the coaxial electric drive axle at the wheel end, a hollow main shaft is provided inside the main body of the coaxial electric drive axle at the wheel end, a bearing assembly is provided inside the wheel hub, an axle tube is provided inside the bearing assembly, and a reducer is provided below the wheel hub.

[0008] Preferably, a first bearing and a second bearing are respectively provided on the upper and lower sides inside the bearing assembly. The first bearing and the second bearing are tapered roller bearings and are inclined inward.

[0009] Preferably, the main shaft is welded to the bridge tube by gas shielded welding, a support plate is provided at the outer side of the wheel hub, and tire mounting bolts are provided at the outer side of the support plate.

[0010] Preferably, a large disc tooth is provided inside the reducer, the large disc tooth is welded to the reducer, and the top of the large disc tooth is meshed with the half shaft.

[0011] Preferably, a top cover is provided at the top position of the main shaft, and a fixing bolt is arranged in a circular array at the top position of the top cover, and the top cover is fixedly connected to the hub by the fixing bolt.

[0012] Preferably, a first fixing sleeve is provided at the outer middle position of the main body of the coaxial electric drive axle at the wheel end, and a second fixing sleeve is provided below the first fixing sleeve.

[0013] Preferably, the rotation angle between the first fixing sleeve and the second fixing sleeve is 90 degrees, and the main body of the wheel-end coaxial electric drive axle is fixedly connected to the vehicle through the first fixing sleeve and the second fixing sleeve.

[0014] Preferably, a mounting plate is provided at the bottom of the main body of the coaxial wheel-end electric drive axle, and fixing holes are arranged in a ring array on the outer side of the mounting plate. The main body of the coaxial wheel-end electric drive axle is connected to the transmission mechanism through the mounting plate.

[0015] Compared with the prior art, this utility model provides a fully floating wheel-end coaxial electric drive axle, which has the following advantages:

[0016] 1. The axle and hollow main shaft are integrated within the coaxial electric drive axle body at the wheel ends via a configuration including a half-shaft, hollow main shaft, bearing assembly, axle tube, reducer, first bearing, second bearing, support plate, large gear, and fixing bolts. This layout makes the axle's internal structure more compact and rational, effectively utilizing the internal space and improving the overall vehicle layout. It also facilitates the installation and arrangement of other components. The bearing assembly inside the wheel hub features a design with first and second bearings on the upper and lower sides respectively. Both bearings are inwardly inclined tapered roller bearings, which better withstand forces from different directions on the wheel hub, significantly improving its support stability, reducing wheel hub sway during rotation, and ensuring vehicle smoothness. The main shaft is connected to the axle tube via gas shielded welding, ensuring a strong and stable connection that is reliable. The system effectively transmits power, reducing energy loss and component damage risks caused by loose connections during power transmission. A support plate and tire mounting bolts are installed on the outer side of the wheel hub, providing a stable structural foundation for tire installation and ensuring the tire is securely mounted on the wheel hub. This guarantees the reliability of the connection between the tire and the wheel hub during vehicle operation. The large disc gear inside the reducer is welded to the reducer and its top meshes with the half-shaft, forming a highly efficient and stable transmission structure. This connection method accurately transmits power from the half-shaft to the reducer, achieving effective power transmission and deceleration / torque amplification functions, thus improving the vehicle's driving performance. The top cover is fixedly connected to the wheel hub via a ring-shaped array of bolts, further enhancing the integrity and stability of the wheel hub structure. This prevents loosening of wheel hub components due to vibration or other factors during vehicle operation, extending the service life of the wheel hub and the entire axle.

[0017] 2. By using the first and second fixing sleeves, the axle is fixed from different directions, forming a multi-angle constraint. The first and second fixing sleeves are arranged at an angle, ensuring that the axle has corresponding support points to resist forces and torques generated from different directions during vehicle operation. This greatly improves the stability of the connection between the axle and the vehicle, reduces the risk of axle loosening or displacement, and ensures vehicle driving safety. This special angle design allows for more uniform force distribution at the axle-vehicle connection. During vehicle acceleration, deceleration, and turning, forces from different directions can be reasonably dispersed through the first and second fixing sleeves, avoiding excessive local stress, extending the service life of the axle and vehicle connection components, and reducing component fatigue damage caused by uneven stress. The angled rotation provides a clear positioning reference for axle installation. During installation, maintenance personnel can more accurately install the axle to the predetermined position on the vehicle, improving installation efficiency and accuracy, ensuring the positional accuracy of the axle after installation, facilitating the coordinated work of the axle with other vehicle components, and improving the overall vehicle performance. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model.

[0019] Figure 2 This is a schematic diagram of the main structure of the coaxial electric drive axle at the wheel end in this utility model.

[0020] Figure 3 This is a cross-sectional structural diagram of the main body of the coaxial electric drive axle at the wheel end of this utility model.

[0021] Figure 4 This is a structural schematic diagram of the cross-section of the wheel end in this utility model.

[0022] In the diagram: 1. Main body of the coaxial electric drive axle at the wheel end; 2. Main shaft; 3. Spline; 4. Reducer; 5. Support plate; 6. Mounting plate; 7. Fixing hole; 8. First fixing sleeve; 9. Second fixing sleeve; 10. Hollow main shaft; 11. Half shaft; 12. Bearing assembly; 13. Top cover; 14. Axle tube; 15. First bearing; 16. Second bearing; 17. Tire mounting bolt; 18. Large disc gear; 19. Fixing bolt; 20. Wheel hub. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] This utility model provides, for example Figure 1-4 The present invention relates to a fully floating wheel-end coaxial electric drive axle, comprising a wheel-end coaxial electric drive axle body 1;

[0025] A main shaft 2 is provided in the middle of the main body 1 of the coaxial electric drive axle at the wheel end, a wheel hub 20 is provided on the outer side of the main shaft 2, and a spline 3 is provided at the bottom of the main shaft 2;

[0026] A half-shaft 11 is provided inside the main body 1 of the coaxial electric drive axle at the wheel end, a hollow main shaft 10 is provided inside the main body 1 of the coaxial electric drive axle at the wheel end, a bearing assembly 12 is provided inside the wheel hub 20, an axle tube 14 is provided inside the bearing assembly 12, and a reducer 4 is provided below the wheel hub 20.

[0027] The bearing assembly 12 has a first bearing 15 and a second bearing 16 respectively installed on the upper and lower sides. The first bearing 15 and the second bearing 16 are tapered roller bearings and are inclined inward.

[0028] The main shaft 2 is welded to the bridge tube 14 by gas shielded welding. A support plate 5 is provided on the outer side of the wheel hub 20, and tire mounting bolts 17 are provided on the outer side of the support plate 5.

[0029] A large disc tooth 18 is provided inside the reducer 4. The large disc tooth 18 is welded to the reducer 4, and the top of the large disc tooth 18 is engaged with the half shaft 11.

[0030] The top of the top cover 13 is provided with a ring array of fixing bolts 19, and the top cover 13 is fixedly connected to the hub 20 by the fixing bolts 19.

[0031] A first fixing sleeve 8 is provided at the middle outer position of the main body 1 of the coaxial electric drive axle at the wheel end, and a second fixing sleeve 9 is provided below the first fixing sleeve 8.

[0032] The rotation angle between the first fixed sleeve 8 and the second fixed sleeve 9 is 90 degrees, and the wheel end coaxial electric drive axle body 1 is fixedly connected to the car through the first fixed sleeve 8 and the second fixed sleeve 9.

[0033] A mounting plate 6 is provided at the bottom of the main body 1 of the coaxial wheel end electric drive axle. Fixing holes 7 are arranged in a ring array on the outer side of the mounting plate 6. The main body 1 of the coaxial wheel end electric drive axle is connected to the transmission mechanism through the mounting plate 6.

[0034] In this embodiment, a specific implementation step of a fully floating coaxial electric drive axle at the wheel end is as follows: The main body 1 of the coaxial electric drive axle at the wheel end is connected to the vehicle through a first fixing sleeve 8 at the middle outer position and a second fixing sleeve 9 below. Since the rotation angle between the first fixing sleeve 8 and the second fixing sleeve 9 is 90 degrees, this design ensures the stability and accuracy of the connection between the axle and the vehicle, allowing the axle to be accurately installed in the predetermined position on the vehicle. At the same time, the mounting plate 6 at the bottom of the coaxial electric drive axle at the wheel end is connected to the transmission mechanism through the fixing holes 7 arranged in a ring array on its outer side, realizing the connection between the axle and the vehicle transmission system. The system is connected to prepare for power transmission. The hub 20 is installed on the outside of the main shaft 2. The inside of the hub 20 is supported and positioned by the bearing assembly 12. The first bearing 15 and the second bearing 16 are respectively set on the upper and lower sides of the bearing assembly 12. As tapered roller bearings, they are inclined inward to provide stable support for the hub 20 and ensure that the hub 20 can rotate smoothly after installation. The support plate 5 is installed on the outside of the hub 20, and the tire mounting bolts 17 are installed on the outside of the support plate 5 for subsequent tire installation. The top cover 13 is fixedly connected to the hub 20 by the fixing bolts 19 arranged in a ring array on the top, further stabilizing the hub 20. The structure of the reducer 4 includes a large disc gear 18 installed inside the reducer 4 and welded to it. The top of the large disc gear 18 then meshes with the half-shaft 11, establishing a power transmission path from the half-shaft 11 to the reducer 4. The power generated by the vehicle engine is transmitted through the transmission mechanism to the half-shaft 11 of the coaxial electric drive axle body 1 at the wheel ends. The half-shaft 11 transmits power to the large disc gear 18 inside the reducer 4, which drives the reducer 4 to work, achieving power reduction and torque increase to meet the vehicle's driving needs. The power processed by the reducer 4 is then transmitted to the main shaft 2, which is connected via a spline 3. The structure transmits power to the wheel hub 20, causing the wheel hub 20 to start rotating. The wheel hub 20 drives the tires mounted on its outer support plate 5 to rotate, thereby driving the vehicle forward or backward. During vehicle operation, the first bearing 15 and the second bearing 16 in the bearing assembly 12 continuously provide stable support force to the wheel hub 20, ensuring that the wheel hub 20 rotates smoothly and reducing the impact of road bumps and other factors on the stability of the axle and the vehicle. At the same time, the wheel-end coaxial electric drive axle body 1 is firmly connected to the car and the transmission mechanism through the first fixed sleeve 8, the second fixed sleeve 9 and the mounting plate 6, ensuring the stable operation of the entire drive system.

[0035] like Figure 1-4As shown, a half-shaft 11 is installed inside the main body 1 of the coaxial electric drive axle at the wheel end, a hollow main shaft 10 is installed inside the main body 1 of the coaxial electric drive axle at the wheel end, a bearing assembly 12 is installed inside the wheel hub 20, an axle tube 14 is installed inside the bearing assembly 12, a reducer 4 is installed below the wheel hub 20, and a first bearing 15 and a second bearing 16 are respectively installed on the upper and lower sides inside the bearing assembly 12. The first bearing 15 and the second bearing 16 are tapered roller bearings. 15 and the second bearing 16 are inclined inward. The main shaft 2 is welded to the bridge tube 14 by gas shielded welding. A support plate 5 is provided on the outer side of the hub 20. A tire mounting bolt 17 is provided on the outer side of the support plate 5. A large disc tooth 18 is provided inside the reducer 4. The large disc tooth 18 is welded to the reducer 4. The top of the large disc tooth 18 is meshed with the half shaft 11. A fixing bolt 19 is arranged in a ring array on the top of the top cover 13. The top cover 13 is fixedly connected to the hub 20 by the fixing bolt 19.

[0036] Preferably, a half-shaft 11 and a hollow main shaft 10 are arranged inside the coaxial electric drive axle body 1 at the wheel ends. This layout makes the internal structure of the axle more compact and reasonable, effectively utilizes the internal space of the axle, helps to improve the rationality of the overall vehicle layout, and provides convenience for the installation and arrangement of other components. The bearing assembly 12 inside the wheel hub 20 adopts a design with a first bearing 15 and a second bearing 16 respectively arranged on the upper and lower sides inside. The first bearing 15 and the second bearing 16 are inwardly inclined tapered roller bearings. This structure can better withstand the forces from different directions from the wheel hub 20, greatly improve the support stability of the wheel hub 20, reduce the shaking of the wheel hub 20 during rotation, and ensure the smoothness of vehicle driving. The main shaft 2 is welded to the axle tube 14 by gas shielded welding, ensuring the firmness and stability of the connection between the two, and can reliably transmit power, reducing the occurrence of problems caused by loose connection during power transmission. To minimize energy loss and component damage, a support plate 5 and tire mounting bolts 17 are installed on the outer side of the wheel hub 20, providing a stable structural foundation for tire installation and ensuring that the tire can be firmly installed on the wheel hub 20. This ensures the reliability of the connection between the tire and the wheel hub 20 during vehicle operation. The large disc gear 18 inside the reducer 4 is welded to the reducer 4, and its top meshes with the half-shaft 11, forming a highly efficient and stable transmission structure. This connection method can accurately transmit the power of the half-shaft 11 to the reducer 4, realizing effective power transmission and deceleration and torque increase functions, thereby improving the vehicle's driving performance. The top cover 13 is fixedly connected to the wheel hub 20 through the fixing bolts 19 arranged in a ring array on the top, further enhancing the integrity and stability of the wheel hub 20 structure, preventing the loosening of related components of the wheel hub 20 due to vibration and other factors during vehicle operation, and extending the service life of the wheel hub 20 and the entire axle.

[0037] like Figure 1-2 and Figure 4As shown, a first fixing sleeve 8 is provided at the middle outer position of the wheel-end coaxial electric drive axle body 1, and a second fixing sleeve 9 is provided below the first fixing sleeve 8. The rotation angle between the first fixing sleeve 8 and the second fixing sleeve 9 is 90 degrees. The wheel-end coaxial electric drive axle body 1 is fixedly connected to the car through the first fixing sleeve 8 and the second fixing sleeve 9.

[0038] Preferably, the two fixing sleeves fix the axle from different directions, forming a multi-angle constraint. The first fixing sleeve 8 and the second fixing sleeve 9 are arranged at 90 degrees, so that the axle has corresponding support points to resist the forces and torques generated from different directions during vehicle operation. This greatly improves the stability of the connection between the axle and the vehicle, reduces the risk of axle loosening or displacement, and ensures vehicle driving safety. This special angle design allows the force on the connection between the axle and the vehicle to be more even. Under conditions such as vehicle acceleration, deceleration, and turning, the forces in different directions can be reasonably distributed through the first fixing sleeve 8 and the second fixing sleeve 9, avoiding excessive local stress, extending the service life of the axle and vehicle connection components, and reducing component fatigue damage caused by uneven stress. The 90-degree rotation angle provides a clear positioning reference for the axle installation. During the installation process, maintenance personnel can more accurately install the axle to the predetermined position on the vehicle, improving installation efficiency and accuracy, ensuring the positional accuracy of the axle after installation, which is conducive to the coordinated work of the axle and other vehicle components, and improving the overall performance of the vehicle.

[0039] like Figure 1-3 As shown, a mounting plate 6 is provided at the bottom of the wheel-end coaxial electric drive axle body 1, and fixing holes 7 are arranged in a ring array on the outer side of the mounting plate 6. The wheel-end coaxial electric drive axle body 1 is connected to the transmission mechanism through the mounting plate 6.

[0040] Optionally, the ring-shaped array of fixing holes 7 enables the mounting plate 6 to reliably connect with the transmission mechanism at multiple points. During vehicle operation, the axle is subjected to various complex forces and torques. Multiple fixing points can evenly distribute these forces. By connecting the mounting plate 6 with the transmission mechanism, the wheel-end coaxial electric drive axle body 1 and the transmission mechanism form a tight whole. This integrated structure helps to improve the coordinated working ability of the entire vehicle drive system, so that power can be transmitted more smoothly from the transmission mechanism to the axle, thereby improving the vehicle's power performance and driving performance.

[0041] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A fully floating wheel-end coaxial electric drive axle, comprising a wheel-end coaxial electric drive axle body (1). The main shaft (2) is provided in the middle of the main body (1) of the coaxial electric drive axle at the wheel end, the hub (20) is provided on the outer side of the main shaft (2), and the spline (3) is provided at the bottom of the main shaft (2). Its features are: A half-shaft (11) is provided inside the main body (1) of the coaxial electric drive axle at the wheel end. A hollow main shaft (10) is provided inside the main body (1) of the coaxial electric drive axle at the wheel end. A bearing assembly (12) is provided inside the wheel hub (20). An axle tube (14) is provided inside the bearing assembly (12). A reducer (4) is provided below the wheel hub (20).

2. The fully floating coaxial electric drive axle at the wheel end according to claim 1, characterized in that: The bearing assembly (12) has a first bearing (15) and a second bearing (16) respectively installed on the upper and lower sides. The first bearing (15) and the second bearing (16) are tapered roller bearings and are inclined inward.

3. The fully floating wheel-end coaxial electric drive axle according to claim 2, characterized in that: The main shaft (2) is welded to the bridge tube (14) by gas shielded welding. A support plate (5) is provided on the outer side of the hub (20), and a tire mounting bolt (17) is provided on the outer side of the support plate (5).

4. The fully floating wheel-end coaxial electric drive axle according to claim 3, characterized in that: The reducer (4) has a large disc tooth (18) inside, which is welded to the reducer (4). The top of the large disc tooth (18) is meshed with the half shaft (11).

5. The fully floating wheel-end coaxial electric drive axle according to claim 4, characterized in that: A top cover (13) is provided at the top of the main shaft (2), and a ring array of fixing bolts (19) is provided at the top of the top cover (13). The top cover (13) is fixedly connected to the hub (20) by the fixing bolts (19).

6. The fully floating wheel-end coaxial electric drive axle according to claim 1, characterized in that: A first fixing sleeve (8) is provided at the middle outer position of the main body (1) of the coaxial electric drive axle at the wheel end, and a second fixing sleeve (9) is provided below the first fixing sleeve (8).

7. The fully floating wheel-end coaxial electric drive axle according to claim 6, characterized in that: The rotation angle between the first fixed sleeve (8) and the second fixed sleeve (9) is 90 degrees, and the wheel end coaxial electric drive axle body (1) is fixedly connected to the car through the first fixed sleeve (8) and the second fixed sleeve (9).

8. The fully floating wheel-end coaxial electric drive axle according to claim 1, characterized in that: The wheel-end coaxial electric drive axle body (1) is provided with a mounting plate (6) at the bottom position. The mounting plate (6) is provided with a ring array of fixing holes (7) on the outer side. The wheel-end coaxial electric drive axle body (1) is connected to the transmission mechanism through the mounting plate (6).

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