Electric drive axle and vehicle with same

Abstract

The electric drive axle comprises a driving assembly and an axle housing, the driving assembly comprises a driving motor and a half shaft, the driving motor comprises a motor shaft, the motor shaft is in transmission connection with the half shaft, the axle housing is provided with a mounting cavity, the driving motor is located in the mounting cavity, and the half shaft is located in the mounting cavity. The electric drive axle further comprises a suspension part located in the installation cavity, and the suspension part is connected to the drive motor and elastically abuts against the axle housing. The suspension part connected to the driving motor elastically abuts against the axle housing, so that vibration generated in the running process of the driving motor can be isolated by the suspension part, the vibration cannot be transmitted to the axle housing and the space in the vehicle, and the comfort of driving and taking the vehicle is improved.

Description

Technical Field

[0001] The present application relates to the technical field of vehicle drive axles, and in particular to an electric drive axle and a vehicle having the same. Background Art

[0002] An electric drive axle is a drive axle that integrates key components such as the drive motor. In new energy vehicles, especially electric vehicles, the electric drive axle is a crucial component, responsible for converting the power generated by the drive motor into torque appropriate to the wheel speed, thereby driving the wheels.

[0003] In related technologies, the drive motor is usually installed on the bridge housing by a rigid connection. This causes the vibration generated during the operation of the drive motor to be directly transmitted to the bridge housing, and then transmitted to the interior space of the vehicle through the bridge housing, affecting the comfort of driving the vehicle. Summary of the Invention

[0004] The embodiments of the present application provide an electric drive axle, which improves the comfort of driving a vehicle, so as to at least partially solve the above-mentioned technical problems.

[0005] In order to achieve the above-mentioned object, according to a first aspect of the present application, an electric drive bridge is provided, comprising:

[0006] The drive assembly includes a drive motor and a half-shaft, wherein the drive motor includes a motor shaft, and the motor shaft is drivingly connected to the half-shaft;

[0007] The axle housing has a mounting cavity, and the drive motor is located in the mounting cavity;

[0008] The electric drive axle further includes a suspension component located in the mounting cavity, the suspension component is connected to the drive motor and elastically supported against the axle housing.

[0009] Optionally, the drive motor further includes a motor housing, the motor shaft is passed through the motor housing, and the motor housing and the bridge housing are spaced apart from each other.

[0010] Optionally, the drive motor further includes a motor housing and a motor stator, the motor housing has a mounting housing connected to the motor stator and a docking housing connected to the mounting housing, and the suspension is connected to the mounting housing and / or the docking housing.

[0011] Optionally, the suspension component is sleeved on the docking shell, and there is a clearance fit between the suspension component and the docking shell.

[0012] Optionally, the mounting cavity has a first cavity matching the mounting shell and a second cavity matching the docking shell, the mounting shell and the inner wall of the first cavity are spaced apart from each other, and the suspension component elastically abuts against the inner wall of the second cavity.

[0013] Optionally, the bridge housing includes a mounting portion, the mounting portion includes a base and a cover plate, the base and the cover plate together form a mounting cavity, the suspension member elastically abuts against the base along one radial side, and the suspension member elastically abuts against the cover plate along the opposite radial side.

[0014] Optionally, the bridge housing also includes a docking structure, which includes a limit block protruding into the installation cavity and a limit groove arranged on the suspension part. The limit block extends into the limit groove along the radial direction of the suspension part to at least limit the axial offset of the suspension part relative to the installation part.

[0015] Optionally, the bridge housing includes a mounting portion, the limit block has a fixed end connected to the mounting portion, a free end away from the fixed end, and an abutment surface recessed in the end surface of the free end, and the abutment surface is circumferentially arranged around the axis of the suspension.

[0016] Optionally, the drive assembly includes a first half-shaft and a second half-shaft, the axis of the first half-shaft, the axis of the second half-shaft and the axis of the motor shaft are collinear with each other, the motor housing includes a first docking shell and a second docking shell, at least part of the first half-shaft extends into the first docking shell, and at least part of the second half-shaft extends into the second docking shell.

[0017] According to a second aspect of the present application, there is provided a vehicle comprising:

[0018] wheels, including hubs;

[0019] As above electric drive bridge;

[0020] The wheel hub is connected to the half shaft.

[0021] In the electric drive axle of the embodiment of the present application, the suspension parts connected to the drive motor are elastically abutted against the bridge housing, so that the vibrations generated during the operation of the drive motor are isolated by the suspension parts, and the vibrations cannot be transmitted to the bridge housing and the interior space of the vehicle, thereby improving the comfort of driving the vehicle.

[0022] Other features and advantages of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] To more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present application. Those skilled in the art can also derive other drawings based on these drawings without inventive effort.

[0024] In order to more completely understand the present application and its beneficial effects, the following description will be given in conjunction with the accompanying drawings, wherein the same drawing numbers represent the same parts in the following description.

[0025] Figure 1 is a partial perspective schematic diagram of a vehicle provided in an exemplary embodiment of the present disclosure;

[0026] Figure 2 is a perspective schematic diagram of an electric drive axle provided in an exemplary embodiment of the present disclosure;

[0027] Figure 3 yes Figure 2 Exploded diagram of the Zhongdian drive axle;

[0028] Figure 4 yes Figure 2 Cross-sectional view at AA in the middle;

[0029] Figure 5 1 is an exploded schematic diagram of an electric drive axle at a docking structure in an exemplary embodiment of the present disclosure.

[0030] Description of reference numerals:

[0031] 1. Drive assembly; 11. Drive motor; 111. Motor shaft; 1111. Spline groove; 112. Motor housing; 1121. Mounting housing; 1122. Docking housing; 1122a. First docking housing; 1122b. Second docking housing; 113. Motor stator; 114. Motor rotor; 12. Axles; 12a. First axle; 12b. Second axle; 121. Spline pin;

[0032] 2. Axle housing; 21. Mounting cavity; 211. First cavity; 212. Second cavity; 22. Mounting portion; 221. Base; 222. Cover plate; 223. Bolt; 23. Docking structure; 231. Limit block; 2311. Fixed end; 2312. Free end; 2313. Abutment surface; 232. Limiting groove; 24. Docking portion; 24a. First docking portion; 24b. Second docking portion; 25. First reinforcement portion; 26. Second reinforcement portion;

[0033] 3. Suspension member; 3a. First suspension member; 3b. Second suspension member;

[0034] 4. Wheel; 41. Hub. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the embodiments described are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0036] It should be understood that terms such as “having”, “including” and “comprising” used herein do not preclude the existence or addition of one or more other elements or combinations thereof.

[0037] In the various drawings of the present application, for the sake of convenience, some sizes of structures or parts are exaggerated relative to other structures or parts. Therefore, they are only used to illustrate the basic structure of the subject matter of the present application.

[0038] See also Figure 1 The present application provides a vehicle, including wheels 4 and an electric drive axle. In this embodiment, the electric drive axle is connected to two opposite sides of the wheel 4 respectively.

[0039] Exemplarily, the vehicle may be a pure electric new energy recreational vehicle (also known as a recreational vehicle, RV for short) or a multi-purpose vehicle (MPV).

[0040] In some embodiments, the reference Figure 1 、 Figure 2 and Figure 3 As shown, the electric drive axle includes a drive assembly 1 and an axle housing 2. In this embodiment, after the drive assembly 1 is installed on the vehicle using the axle housing 2, it can drive the wheels 4 to rotate.

[0041] In some embodiments, the drive assembly 1 includes a drive motor 11 and a half-shaft 12. The drive motor 11 includes a motor shaft 111, which is in transmission connection with the half-shaft 12. In this embodiment, when the drive motor 11 is energized, the motor shaft 111 is driven to rotate. The motor shaft 111 drives the half-shaft 12 to rotate through a transmission connection (e.g., a spline connection).

[0042] In some embodiments, the reference Figure 4 As shown, the axle housing 2 has a mounting cavity 21, and the drive motor 11 is located in the mounting cavity 21. In this embodiment, the drive motor 11 is disposed in the mounting cavity 21, which can protect the drive motor 11 from the influence of the external environment.

[0043] In some embodiments, the wheel 4 includes a hub 41 connected to the half-shaft 12 .

[0044] In this embodiment, the axle shaft 12 is connected to the wheel hub 41 via a flange. The motor shaft 111 transmits torque to the axle shaft 12, which then transmits the torque to the wheel hub 41 and the brake disc. The brake is fixed to the axle housing 2 and acts on the wheel hub 41 and the brake disc.

[0045] For example, the electric drive axle is configured as the vehicle's rear axle structure, providing power to the rear wheels 4. Compared to an electric drive axle configured as the vehicle's front axle structure, the electric drive axle in this solution does not require steering. This simplifies the electric drive axle structure and reduces its volume.

[0046] Reducing the volume of the electric drive axle can increase the interior space of the vehicle. In particular, reducing the volume of the electric drive axle in the vertical direction can make the floor of the interior space flat, which is beneficial for maximizing the interior space of RVs or multi-purpose vehicles and maximizing the expansion of passenger space.

[0047] In some embodiments, the electric drive axle further includes a suspension component 3 located in the mounting cavity 21. In this embodiment, the suspension component 3 is disposed in the mounting cavity 21, which can protect the suspension component 3 from being affected by the external environment.

[0048] In some embodiments, the suspension 3 is connected to the drive motor 11. In this embodiment, the suspension 3 is detachably connected to the drive motor 11, for example, sleeved on the drive motor 11, thereby facilitating assembly and maintenance of the electric drive axle.

[0049] In some embodiments, the suspension member 3 is elastically supported against the axle housing 2. In this embodiment, the suspension member 3 is made of elastic material, such as rubber material, which may be natural rubber (NR).

[0050] In this embodiment, the suspension 3 absorbs and isolates the vibrations generated by the drive motor 11 through the elastic deformation of its own elastic material, preventing these vibrations from being transmitted to the vehicle body, thereby improving the NVH (Noise, Vibration, Harshness) performance of the entire vehicle. The suspension 3 can withstand the static and dynamic loads of the drive motor 11, ensuring that the drive motor 11 is stably supported under various operating conditions. The suspension 3 can also limit the amount of vibration of the drive motor 11 during operation, ensuring the stable operation of the drive motor 11 and avoiding vehicle vibration and noise caused by vibration.

[0051] The suspension member 3 connected to the drive motor 11 elastically abuts against the bridge housing 2, so that the vibration generated during the operation of the drive motor 11 will be isolated by the suspension member 3, and the vibration cannot be transmitted to the bridge housing 2 and the interior space of the vehicle, thereby improving the comfort of driving the vehicle.

[0052] In some embodiments, the drive motor 11 further includes a motor housing 112, and the motor shaft 111 is disposed within the motor housing 112. In this embodiment, after the drive motor 11 is installed in the mounting cavity 21 using the motor housing 112, the motor housing 112 remains stationary, and the motor shaft 111 rotates relative to the motor housing 112.

[0053] In some embodiments, the motor housing 112 is spaced apart from the axle housing 2. In this embodiment, after the motor housing 112 is secured within the mounting cavity 21, it is spaced apart from the axle housing 2 (i.e., the inner wall of the mounting cavity 21), meaning that the motor housing 112 and the axle housing 2 do not contact each other. This reduces the vibration generated by the motor housing 112 and reduces vibration transmission to the axle housing 2, further improving the vibration isolation of the electric drive axle.

[0054] In some embodiments, the drive motor 11 further includes a motor stator 113. In this embodiment, the drive motor 11 further includes a motor rotor 114 that cooperates with the motor stator 113. The motor rotor 114 is located inside the motor stator 113 and can generate relative rotation with the motor stator 113.

[0055] In some embodiments, the motor housing 112 includes a mounting housing 1121 connected to the motor stator 113 and a docking housing 1122 connected to the mounting housing 1121 .

[0056] In this embodiment, the motor rotor 114 is connected to the motor shaft 111. When the drive motor 11 is powered on, the motor rotor 114 and the motor stator 113 rotate relative to each other, thereby causing the motor shaft 111 and the mounting housing 1121 to rotate relative to each other.

[0057] In this embodiment, with reference to Figure 5 As shown, the radial dimension of the docking shell 1122 is not greater than (eg, smaller than) the radial dimension of the mounting shell 1121. The axis of the docking shell 1122, the axis of the mounting shell 1121, and the axis of the motor shaft 111 are collinear.

[0058] In some embodiments, the suspension component 3 is connected to the mounting shell 1121 and / or the docking shell 1122 .

[0059] In this embodiment, compared with the solution of "the suspension 3 is connected to the mounting shell 1121 and the docking shell 1122", connecting the suspension 3 to the mounting shell 1121 or the docking shell 1122 can reduce the contact area between the suspension 3 and the motor shell 112, thereby facilitating the heat dissipation of the drive motor 11.

[0060] Of course, in order to improve the installation strength of the drive motor 11 or better isolate the drive motor 11 from vibration, the suspension component 3 may also be connected to the installation shell 1121 and the docking shell 1122 .

[0061] For example, at least a portion of the motor shaft 111 is disposed within the docking housing 1122, allowing the motor shaft 111 to be transmission-connected to the axle shaft 12 within the docking housing 1122. Thus, the docking housing 1122 can shield the docking portion between the motor shaft 111 and the axle shaft 12, ensuring a stable transmission connection between the drive motor 11 and the axle shaft 12.

[0062] In some embodiments, the suspension member 3 is sleeved on the docking shell 1122. In this embodiment, Figure 5 The suspension member 3 is installed on the docking shell 1122 in a sleeve manner, which has a simple structure and is easy to install and disassemble, thereby reducing the manufacturing and use costs.

[0063] In this embodiment, considering that the mounting shell 1121 is connected to the motor stator 113, the heat generated by the motor stator 113 is released outward through the mounting shell 1121. Compared to the solution of "the suspension member 3 is mounted on the mounting shell 1121", mounting the suspension member 3 on the docking shell 1122 is more conducive to heat dissipation of the drive motor 11 (for example, the outside of the motor stator 113).

[0064] In other embodiments, the suspension component 3 may also be sleeved on the mounting housing 1121 , as long as the motor housing 112 and the axle housing 2 are spaced apart from each other.

[0065] In some embodiments, the suspension component 3 and the docking shell 1122 are clearance-fitted.

[0066] In this embodiment, considering that the suspension 3 is made of elastic material, the matching mode between the suspension 3 and the docking shell 1122 is set to be a clearance fit, which can facilitate the assembly and disassembly of the suspension 3 and the docking shell 1122.

[0067] In some embodiments, the mounting cavity 21 has a first cavity 211 that matches the mounting shell 1121 and a second cavity 212 that matches the docking shell 1122. In this embodiment, the mounting cavity 21 has matching first and second cavities 211, 212 for the mounting shell 1121 and docking shell 1122, respectively. This makes the interior of the mounting cavity 21 compact, reduces the volume of the axle housing 2, and improves the structural strength of the axle housing 2.

[0068] In this embodiment, the radial dimensions of the first cavity 211 match those of the mounting housing 1121, allowing the first cavity 211 to more compactly accommodate the mounting housing 1121 and reducing the volume of the axle housing 2. The radial dimensions of the second cavity 212 match those of the docking housing 1122, reducing the distance between the inner wall of the second cavity 212 and the docking housing 1122 and thereby reducing the volume of the suspension component 3 within the second cavity 212.

[0069] For example, Figure 4 The radial dimension of the first cavity 211 is not less than (eg, greater than) the radial dimension of the second cavity 212. The first cavity 211 and the second cavity 212 are communicated with each other.

[0070] In some embodiments, the mounting housing 1121 is spaced apart from the inner wall of the first cavity 211. In this embodiment, considering that the mounting housing 1121 is connected to the motor stator 113, vibrations generated by the motor stator 113 may be transmitted outward through the mounting housing 1121. The spacing between the mounting housing 1121 and the inner wall of the first cavity 211 (i.e., non-contact) effectively isolates the vibrations generated by the motor stator 113.

[0071] In some embodiments, the suspension member 3 elastically abuts against the inner wall of the second cavity 212. In this embodiment, after the suspension member 3 is sleeved on the docking housing 1122, it elastically abuts against the inner wall of the second cavity 212, thereby limiting the radial offset between the drive motor 11 and the axle housing 2 along the motor shaft 111.

[0072] In this embodiment, the docking shell 1122 of the motor housing 112 is connected to the suspension component 3, and the suspension component 3 is elastically abutted against the inner wall of the bridge housing 2 located in the second cavity 212, so that the mounting shell 1121 and the inner wall of the first cavity 211 are spaced apart from each other, which is beneficial to the heat dissipation of the mounting shell 1121 (that is, the motor stator 113 connected to the mounting shell 1121).

[0073] In some embodiments, the axle housing 2 includes a mounting portion 22. In this embodiment, the upper and lower end surfaces of the mounting portion 22 are flat, which can reduce the vertical space occupied by the electric drive axle and make the floor of the vehicle interior flat.

[0074] In some embodiments, the mounting portion 22 includes a base 221 and a cover 222, which together form the mounting cavity 21. In this embodiment, the base 221 and the cover 222 are detachably connected to facilitate installation and maintenance of components in the mounting cavity 21.

[0075] For example, the base 221 and the cover 222 are detachably connected by a plurality of bolts 223. The plurality of bolts 223 are evenly arranged at the edge of the cover 222 to improve the connection strength between the base 221 and the cover 222.

[0076] Of course, other detachable connection methods such as snap connection can also be used between the base 221 and the cover 222. Alternatively, the base 221 and the cover 222 are non-detachably connected.

[0077] Exemplarily, the cover 222 is connected to the lower end of the base 221. When maintenance is required inside the installation cavity 21, the cover 222 can be removed from the bottom of the vehicle, thereby facilitating maintenance of the internal components of the installation cavity 21 (such as the drive motor 11 and the suspension 3).

[0078] In some embodiments, the suspension member 3 elastically presses against the base 221 along one radial side, and elastically presses against the cover plate 222 along the opposite radial side.

[0079] In this embodiment, the suspension component 3 abuts between the base 221 and the cover plate 222 , which can limit the suspension component 3 from being deflected radially within the mounting cavity 21 .

[0080] In this embodiment, after the suspension member 3 is elastically supported between the base 221 and the cover plate 222, the radial gap between the suspension member 3 and the drive motor 11 can be eliminated, so that the drive motor 11 installed in the installation cavity 21 using the suspension member 3 can work more stably and is less likely to shake.

[0081] In some embodiments, the axle housing 2 further includes a docking structure 23 , which includes a limiting block 231 protruding into the installation cavity 21 and a limiting groove 232 provided on the suspension component 3 .

[0082] In this embodiment, the limiting block 231 is connected to the axle housing 2. The limiting block 231 and the limiting groove 232 can be clearance-fitted or interference-fitted.

[0083] In some embodiments, the limiting block 231 extends into the limiting groove 232 along the radial direction of the suspension component 3 to at least limit the axial displacement of the suspension component 3 relative to the mounting portion 22 .

[0084] In this embodiment, Figure 5 After the limit block 231 extends into the limit groove 232 along the radial direction of the suspension 3, the limit block 231 abuts against the inner wall of the limit groove 232 along the axial direction of the suspension 3, thereby limiting the offset between the limit block 231 and the limit groove 232 along the axial direction of the suspension 3.

[0085] In this embodiment, since the limiting block 231 extends into the limiting groove 232 along the radial direction of the suspension 3, the docking structure 23 can also play a positioning role in the installation of the suspension 3, thereby improving the installation accuracy of the suspension 3.

[0086] In this embodiment, the inner wall of the second cavity 212 abutting against the suspension 3 is set to a circular arc surface matching the suspension 3, so that the inner wall of the second cavity 212 fits the outer end surface of the suspension 3, increasing the contact area between the suspension 3 and the bridge housing 2 (i.e., the mounting portion 22), and improving the limiting strength between the suspension 3 and the bridge housing 2.

[0087] In some embodiments, continue with reference to Figure 5 As shown, the limiting block 231 has a fixed end 2311 connected to the mounting portion 22 , a free end 2312 away from the fixed end 2311 , and an abutting surface 2313 recessed in an end surface of the free end 2312 .

[0088] In this embodiment, the limit block 231 is connected to the cover plate 222 and / or the base 221. The fixed end 2311 and the free end 2312 are located at opposite ends of the limit block 231 along the radial direction of the motor shaft 111. After the limit block 231 extends into the limit slot 232 along the radial direction of the suspension member 3, the abutment surface 2313 abuts against the bottom surface of the limit slot 232.

[0089] Exemplarily, the limiting block 231 is connected to the cover plate 222. For example, the limiting block 231 can be integrally formed with the cover plate 222.

[0090] In this embodiment, the inner wall surface of the base 221 that abuts against the suspension 3 (that is, the suspension 3 abuts against the inner wall of the second cavity 212) is set to a circular arc surface that matches the suspension 3, so that the inner wall of the base 221 fits against the outer end surface of the suspension 3, increasing the contact area between the suspension 3 and the mounting portion 22 (that is, the base 221), and improving the limiting strength between the suspension 3 and the base 221 along the axial direction of the suspension 3.

[0091] In some embodiments, the abutment surface 2313 is circumferentially disposed around the axis of the suspension member 3. In this embodiment, the abutment surface 2313 is configured as an arcuate surface that matches the radial end surface of the suspension member 3 (i.e., the bottom surface of the retaining groove 232). After the retaining block 231 extends into the retaining groove 232, the abutment surface 2313 abuts against the bottom surface of the retaining groove 232, thereby limiting the deflection of the suspension member 3 (e.g., limiting the deflection of the suspension member 3 around its axis).

[0092] In this embodiment, after the abutting surface 2313 of the limiting block 231 extends into the limiting groove 232, the abutting surface 2313 fits against the bottom surface of the limiting groove 232, thereby increasing the contact area between the limiting block 231 and the limiting groove 232 and improving the limiting strength of the docking structure 23 for the suspension component 3.

[0093] In some embodiments, the drive assembly 1 includes a first half-shaft 12a and a second half-shaft 12b. In this embodiment, a single drive motor 11 simultaneously drives the rotation of the first and second half-shafts 12a, 12b, reducing the size of the electric drive axle. The first and second half-shafts 12a, 12b are symmetrically arranged on opposite sides of the drive motor 11.

[0094] In some embodiments, the axis of the first semi-shaft 12 a , the axis of the second semi-shaft 12 b , and the axis of the motor shaft 111 are collinear with each other.

[0095] In this embodiment, the first half-shaft 12a and the motor shaft 111, as well as the second half-shaft 12b and the motor shaft 111, achieve coaxial rotation through the mutually cooperating spline grooves 1111 and spline pins 121, thereby reducing transmission losses and improving power output efficiency.

[0096] In this embodiment, a single motor is spline-connected to the half-shafts 12 symmetrically arranged on both sides, thereby coaxially outputting torque to the two half-shafts 12, reducing the space occupied by the electric drive axle in the vertical direction (i.e., the radial direction of the motor shaft), and making the floor of the vehicle interior flat.

[0097] For example, the motor shaft 111 can be a hollow shaft, with a spline groove 1111 disposed in the hollow shaft, and a spline pin 121 disposed on the half shaft 12. After the end of the half shaft 12 extends into the hollow shaft (i.e., the motor shaft 111), the spline pin 121 cooperates with the spline groove 1111 to achieve transmission cooperation between the motor shaft 111 and the half shaft 12.

[0098] In some embodiments, the motor housing 112 includes a first docking shell 1122a and a second docking shell 1122b. In this embodiment, the first docking shell 1122a and the second docking shell 1122b are located on opposite axial sides of the mounting shell 1121. The electric drive axle includes a first suspension 3a and a second suspension 3b. The first suspension 3a is mounted on the first docking shell 1122a, and the second suspension 3b is mounted on the second docking shell 1122b, improving the stability of the drive motor 11 during operation. Furthermore, the arrangement of the first suspension 3a and the second suspension 3b can better isolate the drive motor 11 from vibrations.

[0099] In some embodiments, at least a portion of the first half-shaft 12a extends into the first docking shell 1122a, and at least a portion of the second half-shaft 12b extends into the second docking shell 1122b. In this embodiment, the docking point between the first half-shaft 12a and the motor shaft 111 is located within the first docking shell 1122a, and the docking point between the second half-shaft 12b and the motor shaft 111 is located within the second docking shell 1122b. The two docking shells 1122 can shield the connection between the motor shaft 111 and the half-shaft 12 (i.e., the mating point between the spline groove 1111 and the spline pin 121), ensuring a stable transmission connection between the motor shaft 111 and the half-shaft 12, and can also reduce noise at the mating point between the spline groove 1111 and the spline pin 121.

[0100] In some embodiments, the bridge housing 2 includes a docking portion 24 connected to the mounting portion 22 , the half shaft 12 passes through the docking portion 24 , and the half shaft 12 achieves relative rotation with the docking portion 24 via corresponding bearings.

[0101] In this embodiment, the axle housing 2 includes a first docking portion 24 a and a second docking portion 24 b . The first docking portion 24 a and the second docking portion 24 b are symmetrically disposed on opposite sides of the mounting portion 22 in the axial direction.

[0102] In some embodiments, continue with reference to Figure 2As shown, the axle housing 2 includes a first reinforcement portion 25 connecting the first docking portion 24 a and the mounting portion 22 , and a second reinforcement portion 26 connecting the second docking portion 24 b and the mounting portion 22 .

[0103] In this embodiment, the first reinforcement portion 25 is arranged along the horizontal direction (eg Figure 1 The dimension of the first reinforcement portion 25 (in the front-to-back direction) decreases (e.g., gradually decreases) from the side close to the second reinforcement portion 26 toward the side away from the second reinforcement portion 26, so that the first reinforcement portion 25 has a conical structure (e.g., a triangle, a trapezoid, or an arc).

[0104] In this embodiment, the second reinforcement portion 26 is arranged along the horizontal direction (eg Figure 1 The dimension of the second reinforcement portion 26 (in the front-to-back direction) decreases (for example, gradually decreases) from the side close to the first reinforcement portion 25 toward the side away from the first reinforcement portion 25, so that the second reinforcement portion 26 has a conical structure (for example, a triangle, a trapezoid, or an arc).

[0105] In this embodiment, the first reinforcement portion 25 and the second reinforcement portion 26 are tapered (eg, triangular) in shape, and have a stable structure and high strength.

[0106] In this embodiment, after the first reinforcement portion 25 and the second reinforcement portion 26 are connected to each other, that is, after the two conical structures are symmetrically arranged (for example, forming a rhombus), the structural strength of the mounting portion 22 is improved, and the connection strength between the mounting portion 22 and the first docking portion 24a and the second docking portion 24b is improved, thereby improving the overall structural strength of the bridge housing 2 and ensuring the installation strength of the drive motor 11.

[0107] In this embodiment, the dimension of the first reinforcement portion 25 along the vertical direction is equal to the dimension of the second reinforcement portion 26 along the vertical direction, and the upper and lower end surfaces of the first reinforcement portion 25 and the second reinforcement portion 26 remain flat, avoiding the first reinforcement portion 25 and the second reinforcement portion 26 from interfering with the driving of the vehicle and making the floor of the interior space flat.

[0108] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify 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, "plurality" means two or more, unless otherwise specifically defined.

[0109] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0110] The embodiments, implementation methods and related technical features of the present application can be combined and replaced with each other unless there is any conflict.

[0111] The above are merely preferred embodiments of the present application and do not constitute any form of limitation to the present application. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present application without departing from the content of the technical solution of the present application are still within the scope of the technical solution of the present application.

Claims

1. An electric drive bridge, characterized in that: include: A drive assembly includes a drive motor and a half-shaft, wherein the drive motor includes a motor shaft, and the motor shaft is drivingly connected to the half-shaft; The axle housing has a mounting cavity, and the drive motor is located in the mounting cavity; The electric drive axle further includes a suspension component located in the mounting cavity, the suspension component is connected to the drive motor and elastically supported against the axle housing.

2. The electric drive axle according to claim 1, characterized in that: The drive motor further includes a motor housing, the motor shaft is passed through the motor housing, and the motor housing and the bridge housing are spaced apart from each other.

3. The electric drive axle according to claim 1, wherein: The drive motor further comprises a motor housing and a motor stator. The motor housing comprises a mounting housing connected to the motor stator and a docking housing connected to the mounting housing. The suspension is connected to the mounting housing and / or the docking housing.

4. The electric drive axle according to claim 3, characterized in that: The suspension piece is sleeved on the docking shell, and there is a clearance fit between the suspension piece and the docking shell.

5. The electric drive axle according to claim 3, characterized in that: The installation cavity comprises a first cavity matched with the installation shell and a second cavity matched with the docking shell. The installation shell and the inner wall of the first cavity are spaced apart from each other, and the suspension component elastically abuts against the inner wall of the second cavity.

6. The electric drive axle according to claim 1, wherein: The bridge housing includes a mounting portion, which includes a base and a cover plate. The base and the cover plate together form a mounting cavity. The suspension member elastically supports the base along one radial side, and elastically supports the cover plate along the opposite radial side.

7. The electric drive axle according to claim 1, wherein: The bridge housing also includes a docking structure, which includes a limit block protruding into the installation cavity and a limit groove arranged on the suspension part. The limit block extends into the limit groove along the radial direction of the suspension part to at least limit the axial displacement of the suspension part relative to the installation part.

8. The electric drive axle according to claim 7, characterized in that: The bridge housing includes a mounting portion, and the limit block has a fixed end connected to the mounting portion, a free end away from the fixed end, and an abutment surface recessed in the end surface of the free end, wherein the abutment surface is circumferentially arranged around the axis of the suspension component.

9. The electric drive axle according to claim 3, characterized in that: The drive assembly includes a first half-shaft and a second half-shaft, the axes of the first half-shaft, the second half-shaft and the axis of the motor shaft are collinear with each other, the motor housing includes a first docking shell and a second docking shell, at least a portion of the first half-shaft extends into the first docking shell, and at least a portion of the second half-shaft extends into the second docking shell.

10. A vehicle, characterized in that: include: wheels, including hubs; The electric drive axle according to any one of claims 1 to 9; Wherein, the wheel hub is connected to the half shaft.

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