Electric drive axle assembly for vehicle and vehicle

Abstract

The utility model discloses an electric drive axle assembly for a vehicle and the vehicle. The electric drive axle assembly comprises a bearing axle pipe, a connecting axle pipe, a first electric drive assembly and a second electric drive assembly. A first containing cavity is formed in the bearing axle pipe, and the two ends of the first containing cavity are open in the axial direction. The connecting bridge pipes are arranged at the two ends of the bearing bridge pipe. The first electric drive assembly and the second electric drive assembly are arranged in the first containing cavity and connected with the connecting axle pipes at the two ends of the bearing axle pipe correspondingly, and the first electric drive assembly and the second electric drive assembly are provided with a first output shaft and a second output shaft which penetrate through the connecting axle pipes correspondingly. And the first output shaft and the second output shaft are coaxial and are respectively linked with the corresponding wheel assemblies. According to the electric drive axle assembly, the two electric drive assemblies are coaxially arranged, so that the structure of the electric drive axle assembly is more compact. And the bearing axle tube is connected with the connecting axle tube, so that the bearing of the axle body and the bearing of the driving system shell are decoupled, the damage of vibration to the electric drive assembly is reduced, and the safety of the vehicle is improved.

Description

Technical Field

[0001] The utility model relates to the field of vehicles, in particular to an electric drive axle assembly for a vehicle and the vehicle. Background Art

[0002] At the current stage, the parallel-axis electric drive axle structure is the main layout in the electric drive axle industry. The coaxial electric drive axle structure is limited by the coupling between the bridge body load and the drive system housing load, resulting in limited overall load. Therefore, the coaxial electric drive axle structure is usually only used in small-tonnage vehicles. For large-tonnage vehicles, the coaxial electric drive axle structure will cause the vehicle weight to be larger and difficult to meet the lightweight requirements. Utility Model Content

[0003] The present utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the present utility model is to propose an electric drive axle assembly for a vehicle. According to the electric drive axle assembly of the present utility model, two electric drive assemblies are coaxially arranged, making the structure of the electric drive axle assembly more compact. At the same time, the connection between the load-bearing bridge tube and the connecting bridge tube decouples the load-bearing of the bridge body from the load-bearing of the drive system housing. The way in which the load-bearing bridge tube resists vibration impact avoids damage to the housing of the electric drive assembly caused by vibration, which can improve the ability of the electric drive axle assembly to withstand vibration impact, thereby improving the safety of the vehicle.

[0004] The utility model also provides a vehicle comprising the electric drive axle assembly.

[0005] According to the utility model, the electric drive axle assembly includes: a load-bearing bridge tube, a connecting bridge tube, a first electric drive assembly and a second electric drive assembly. A first accommodating cavity is formed in the load-bearing bridge tube, which is open at both ends in the axial direction; the connecting bridge tube is arranged at both ends of the load-bearing bridge tube; the first electric drive assembly and the second electric drive assembly are respectively arranged in the first accommodating cavity and are respectively connected to the connecting bridge tubes at both ends of the load-bearing bridge tube. The first electric drive assembly and the second electric drive assembly are respectively provided with a first output shaft and a second output shaft passing through the connecting bridge tube. The first output shaft and the second output shaft are coaxial and are respectively linked to the corresponding wheel assemblies.

[0006] According to the electric drive axle assembly of the present invention, the two electric drive assemblies are arranged coaxially, reducing the space occupied by the two electric drive assemblies when arranged, making the structure of the electric drive axle assembly more compact. The connection between the load-bearing bridge tube and the connecting bridge tube decouples the load of the bridge body from the load of the drive system housing. The overload bridge tube resists vibration and impact, thereby avoiding damage to the housing of the electric drive assembly due to vibration, which can improve the electric drive axle assembly's ability to withstand vibration and impact, thereby improving vehicle safety. At the same time, the load-bearing capacity of the electric drive axle assembly is increased, making the electric drive axle assembly suitable for large-tonnage vehicles, expanding the scope of application of the electric drive axle assembly, and improving practicality.

[0007] According to one embodiment of the present invention, the load-bearing bridge tube includes: a first tube body portion, a second tube body portion and a connecting portion, the first tube body portion and the second tube body portion are arranged at intervals and are respectively connected to the corresponding connecting bridge tube; the connecting portion connects the first tube body portion with the second tube body portion; wherein, the first tube body portion, the second tube body portion and the connecting portion jointly define the first accommodating cavity.

[0008] According to an embodiment of the present invention, the connecting portion is constructed as a plurality of connecting beams spaced apart in the circumferential direction of the load-bearing bridge tube.

[0009] According to one embodiment of the present invention, a hollow area is formed between two adjacent connecting beams, a cavity is formed inside the connecting beam, a through hole communicating with the cavity is provided on the first tube body portion and / or the second tube body portion, and a bearing member can be optionally provided in the cavity.

[0010] According to an embodiment of the present invention, a vibration-damping mount is provided on the connecting portion, and a motor controller is provided on the vibration-damping mount.

[0011] According to one embodiment of the present utility model, a second accommodating cavity connected to the first accommodating cavity is formed in the connecting bridge tube, and a reduction device is provided in the second accommodating cavity. The reduction devices are constructed into two corresponding to the second accommodating cavities one by one, one of the reduction devices is linked to the first output shaft, and the other reduction device is linked to the second output shaft.

[0012] According to one embodiment of the present utility model, the connecting bridge tube includes: a first connecting section and a second connecting section, the first connecting section is connected to the load-bearing bridge tube, and the second accommodating cavity is formed in the first connecting section; one end of the connecting section is connected to the first connecting section, and the other end of the connecting section is connected to the wheel assembly; wherein, the diameter of the first connecting section gradually decreases in the direction axially away from the load-bearing bridge tube.

[0013] According to one embodiment of the present utility model, the first connecting section includes: a first sub-section and a second sub-section, the first sub-section is connected to the load-bearing bridge tube, and a plurality of first mounting portions spaced circumferentially are provided on the first sub-section, and each of the first mounting portions is provided with a first mounting hole suitable for cooperating with the load-bearing bridge tube; the second sub-section connects the first sub-section with the second connecting section, and a plurality of second mounting portions spaced circumferentially are provided on the second sub-section, and each of the second mounting portions is provided with a second mounting hole suitable for cooperating with the housing of the reduction device.

[0014] According to an embodiment of the present invention, a first reinforcement portion is provided between two adjacent first mounting portions; and a second reinforcement portion is provided between two adjacent second mounting portions.

[0015] The vehicle according to the present invention is briefly described below.

[0016] The vehicle according to the present invention includes the electric drive axle assembly of the above-described embodiment. Since the vehicle according to the present invention is equipped with the electric drive axle assembly of the above-described embodiment, the connection between the load-bearing bridge tube and the connecting bridge tube decouples the load on the bridge body from the load on the drive system housing. Vibration and impact during vehicle operation can be borne by the load-bearing bridge tube, thus preventing damage to the electric drive assembly and improving vehicle safety. Furthermore, the coaxial arrangement of the two electric drive assemblies reduces the space occupied by the electric drive axle assembly, improving the compactness of the vehicle layout.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0019] Figure 1 is a half-section view of an electric drive axle assembly according to one embodiment of the utility model;

[0020] Figure 2 This is a transmission principle diagram of an electric drive axle assembly according to an embodiment of the utility model;

[0021] Figure 3 This is a structural diagram of an electric drive axle assembly according to one embodiment of the present utility model;

[0022] Figure 4 This is a front view of an electric drive axle assembly according to one embodiment of the utility model;

[0023] Figure 5 1 is a schematic diagram of a framework of an electric drive axle assembly according to an embodiment of the present utility model;

[0024] Figure 6 This is a structural diagram of a load-bearing bridge tube according to an embodiment of the present utility model;

[0025] Figure 7 It is a schematic diagram of a connecting bridge tube and a wheel assembly according to an embodiment of the present utility model.

[0026] Reference numerals:

[0027] Electric drive axle assembly 1;

[0028] The supporting bridge tube 11, the first accommodating cavity 110, the first tube body 111, the second tube body 112, the connecting beam 113, the hollow area 114, the supporting member 115, and the through hole 116;

[0029] Connecting bridge pipe 12, second accommodating cavity 120, first connecting section 121, first subsection 1211, first mounting portion 12111, first reinforcement portion 12112, second subsection 1212, second mounting portion 12121, second reinforcement portion 12122, second connecting section 122;

[0030] A first electric drive assembly 131 and a first output shaft 1311;

[0031] A second electric drive assembly 132 and a second output shaft 1321;

[0032] Vibration-damping mount 141, motor controller 142;

[0033] Speed reduction device 15 , wheel assembly 16 , and support platform 101 . DETAILED DESCRIPTION

[0034] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0035] At the current stage, the parallel-axis electric drive axle structure is the main layout in the electric drive axle industry. The coaxial electric drive axle structure is limited by the coupling between the bridge body load and the drive system housing load, resulting in limited overall load. Therefore, the coaxial electric drive axle structure is usually only used in small-tonnage vehicles. For large-tonnage vehicles, the coaxial electric drive axle structure will cause the vehicle weight to be larger and difficult to meet the lightweight requirements.

[0036] Reference below Figure 1-Figure 7 An electric drive axle assembly according to an embodiment of the present invention is described.

[0037] According to the utility model, the electric drive axle assembly 1 includes: a load-bearing bridge tube 11, a connecting bridge tube 12, a first electric drive assembly 131 and a second electric drive assembly 132. A first accommodating cavity 110 is formed in the load-bearing bridge tube 11, which is open at both ends in the axial direction; the connecting bridge tube 12 is arranged at both ends of the load-bearing bridge tube 11; the first electric drive assembly 131 and the second electric drive assembly 132 are respectively arranged in the first accommodating cavity 110 and are respectively connected to the connecting bridge tubes 12 at both ends of the load-bearing bridge tube 11. The first electric drive assembly 131 and the second electric drive assembly 132 are respectively provided with a first output shaft 1311 and a second output shaft 1321 passing through the connecting bridge tube 12. The first output shaft 1311 and the second output shaft 1321 are coaxial and respectively linked to the corresponding wheel assemblies 16.

[0038] According to the utility model, the electric drive axle assembly 1 is provided with a load-bearing bridge tube 11 and a connecting bridge tube 12, wherein the load-bearing bridge tube 11 extends in the width direction of the vehicle, and a first accommodating cavity 110 is formed in the load-bearing bridge tube 11, which is open at both ends in the axial direction. The first electric drive assembly 131 and the second electric drive assembly 132 can be arranged in the first accommodating cavity 110; the connecting bridge tube 12 is constructed into two and is respectively arranged at the two ends of the load-bearing bridge tube 11, and the first electric drive assembly 131 and the second electric drive assembly 132 are respectively provided with their own first output shaft 1311 and second output shaft 1321. When the first electric drive assembly 131 and the second electric drive assembly 132 are assembled into the first accommodating cavity 110, the first output shaft 1311 and the second output shaft 1321 respectively pass through the corresponding connecting bridge tube 12 and then link with the corresponding wheel assembly 16, so as to realize the control of the wheel assembly 16.

[0039] The electric drive axle assembly 1 integrates the first electric drive assembly 131 and the second electric drive assembly 132 in the first accommodating cavity 110 in the load-bearing bridge tube 11, and allows the first drive shaft and the second drive shaft to pass through the connecting bridge tube 12 and then be linked with the wheel assembly 16, thereby achieving a compact layout of the power system, saving vehicle space, and making the overall vehicle design more compact and efficient.

[0040] During the layout, the first output shaft 1311 and the second output shaft 1321 are coaxially arranged, ensuring that the first electric drive assembly 131 and the second electric drive assembly 132 can maintain synchronization and high efficiency in the power transmission at both ends of the load-bearing bridge tube 11 when outputting power, which can improve the stability of the vehicle. At the same time, the coaxial design of the first output shaft 1311 and the second output shaft 1321 not only simplifies the transmission mechanism, but also reduces energy loss during power transmission and improves transmission efficiency. The coaxial output of the first electric drive assembly 131 and the second electric drive assembly 132 can provide the vehicle with better driving force distribution and more flexible handling performance, especially when driving on complex road conditions and at high speeds, and can provide a more stable and safer driving experience.

[0041] Compared with the parallel axis design of dual motors in the related art, the two electric drive assemblies of the present invention are coaxially arranged, which can reduce the space occupied by the two electric drive assemblies when arranged, make the structure of the electric drive axle assembly 1 more compact, and thus reduce the space occupied by the electric drive axle assembly 1 when assembled in the vehicle. The small-volume electric drive axle assembly 1 does not require too many mounting structures such as brackets during assembly, which can achieve lightweighting of the vehicle.

[0042] Compared with the dual-motor coaxial design scheme in the related art, the utility model is provided with a load-bearing bridge tube 11, and the first electric drive assembly 131 and the second electric drive assembly 132 are arranged in the first accommodating cavity 110 of the load-bearing bridge tube 11. After the load-bearing bridge tube 11 is connected to the connecting bridge tube 12, the bridge body load and the drive system housing load are decoupled. It can be simply understood as follows: during the driving of the vehicle, the vibration impact of the vehicle will be transmitted to the load-bearing bridge tube 11 but not directly transmitted to the housing of the electric drive assembly. The load-bearing bridge tube 11 resists the vibration impact, thereby avoiding the damage to the housing of the electric drive assembly caused by vibration, and can improve the ability of the electric drive bridge assembly 1 to withstand vibration impact, thereby improving the safety of the vehicle. At the same time, the load-bearing capacity of the electric drive bridge assembly 1 is increased, so that the electric drive bridge assembly 1 can be suitable for large-tonnage vehicles, thereby improving the scope of application of the electric drive bridge assembly 1 and being more practical.

[0043] In some embodiments, the load-bearing bridge tube 11 can be made of a cast aluminum structure, which can achieve lightweighting of the vehicle while taking into account both load-bearing strength and rigidity.

[0044] According to one embodiment of the present invention, the load-bearing bridge tube 11 includes: a first tube body portion 111, a second tube body portion 112 and a connecting portion, the first tube body portion 111 and the second tube body portion 112 are arranged at intervals and are respectively connected to the corresponding connecting bridge tube 12; the connecting portion connects the first tube body portion 111 with the second tube body portion 112; wherein, the first tube body portion 111, the second tube body portion 112 and the connecting portion jointly define a first accommodating cavity 110.

[0045] The load-bearing bridge tube 11 is a key structure for improving the load-bearing capacity of the electric drive axle assembly 1. Specifically, the load-bearing bridge tube 11 is provided with a first tube body portion 111 and a second tube body portion 112 and a connecting portion spaced apart from each other, wherein the first tube body portion 111 and the second tube body portion 112 are respectively connected and fixed to the connecting bridge tubes 12 at both ends of the load-bearing bridge tube 11. The first tube body portion 111 and the second tube body portion 112 can be provided with a structure that cooperates with the corresponding connecting bridge tube 12. For example, the first tube body portion 111 and the second tube body portion 112 can be provided with Bolt holes are provided, and the first tube body portion 111 and the second tube body portion 112 are respectively connected and fixed to the corresponding connecting bridge tube 12 by bolts and other fasteners, thereby improving the structural stability of the electric drive axle assembly 1; the connecting portion is provided between the first tube body portion 111 and the second tube body portion 112 and connects the first tube body portion 111 and the second tube body portion 112. The connecting portion, the first tube body portion 111 and the second tube body portion 112 jointly define a first accommodating cavity 110, which is convenient for accommodating the first electric drive assembly 131 and the second electric drive assembly 132. The setting of the load-bearing bridge tube 11 provides space for the assembly of the first electric drive assembly 131 and the second electric drive assembly 132, which can improve the compactness of the structure of the electric drive axle assembly 1.

[0046] According to one embodiment of the present invention, the connection portion is constructed as a plurality of connection beams 113 spaced apart in the circumferential direction of the load-bearing bridge tube 11. The plurality of connection beams 113 spaced apart in the circumferential direction can form an effective support structure, ensuring a stable connection between the first tube portion 111 and the second tube portion 112, enhancing the rigidity and strength of the connection portion, and enabling the entire electric drive axle assembly 1 to withstand various forces and moments from the electric drive assembly and the wheel assembly 16. Furthermore, the connection portion is constructed as a plurality of connection beams 113 spaced apart from each other. Compared with a continuous solid connection portion, the design of the plurality of connection beams 113 significantly reduces the weight of the connection portion, thereby achieving a lightweight vehicle, improving fuel economy, or extending the cruising range.

[0047] In addition, the spacing between the connecting beams 113 provides additional heat dissipation channels for the heat generated by the electric drive assembly, which helps to quickly dissipate the heat and reduce the operating temperature of the electric drive assembly, thereby improving its operating efficiency and reliability.

[0048] In some embodiments, the number of connecting beams 113 can be determined according to the actual stress conditions of the electric drive axle assembly 1, the tonnage of the vehicle model, etc. For example, the number of connecting beams 113 can be three, four, or other numbers.

[0049] According to one embodiment of the present invention, a hollow area 114 is formed between two adjacent connecting beams 113, a cavity is formed inside the connecting beam 113, a through hole 116 communicating with the cavity is provided on the first tube body portion 111 and / or the second tube body portion 112, and a supporting member 115 can be optionally provided in the cavity.

[0050] During processing, a hollow area 114 is formed between two adjacent connecting beams 113, which can reduce the weight of the electric drive axle assembly 1 and thus achieve lightweighting of the vehicle. Since the load-bearing bridge tube 11 needs to bear the impact on the electric drive axle assembly 1, a cavity is set inside the connecting beam 113 of the load-bearing bridge tube 11. At the same time, a through hole 116 corresponding to the cavity is set on the first tube body 111 and the second tube body 112. When the electric drive axle assembly 1 is assembled to a large-tonnage vehicle, a bearing member 115 can be assembled into the cavity through the through hole 116. The bearing member 115 can be a higher-strength structure such as a steel shaft. After the bearing member 115 is assembled into the cavity, the structural strength and rigidity of the electric drive axle assembly 1 can be further improved, ensuring that the electric drive axle assembly 1 can bear the impact transmitted by the large-tonnage vehicle model, thereby increasing the service life of the electric drive axle assembly 1 and thus improving the safety of the vehicle.

[0051] In some embodiments, when adding the bearing member 115, it can be determined whether the bearing member 115 needs to be heat treated based on the current bearing strength and stiffness requirements. For example, when the bearing strength and stiffness requirements are high, the bearing member 115 can be heat treated to further improve the bearing capacity of the bearing bridge tube 11.

[0052] According to one embodiment of the present invention, a vibration-damping mount 141 is provided on the connection portion, and a motor controller 142 is provided on the vibration-damping mount 141. In related art, the motor controller 142 is typically mounted on the vehicle frame, constituting a sprung mass relative to the vehicle as a whole, and is often subject to space constraints during vehicle layout. However, the present invention integrates the motor controller 142 with the load-bearing bridge tube 11 by placing it on the connection portion. This makes the motor controller 142 an unsprung mass relative to the vehicle as a whole, reducing the space occupied by the electric drive axle assembly 1 and facilitating vehicle layout.

[0053] Furthermore, when configuring the motor controller 142, the electric drive axle assembly 1 can be provided with a vibration-damping mount 141 on the connection portion, with the motor controller 142 being provided on the vibration-damping mount 141. When the electric drive axle assembly 1 is assembled in a vehicle, the vibration-damping mount 141 can reduce the vibration shock transmitted to the motor controller 142, thereby improving the safety of the motor controller 142 and ensuring that the motor controller 142 can function properly. By providing the vibration-damping mount 141 on the connection portion, the motor controller 142 can be integrated with the load-bearing bridge tube 11 while ensuring that the vibration shock to the motor controller 142 is within the tolerance range of the motor controller 142 itself, thereby improving both the integration level and the safety of the vehicle.

[0054] According to one embodiment of the present invention, a second accommodating cavity 120 communicating with the first accommodating cavity 110 is formed in the connecting bridge tube 12, and a reduction device 15 is provided in the second accommodating cavity 120. The reduction devices 15 are constructed into two corresponding to the second accommodating cavities 120 one by one, wherein one of the reduction devices 15 is linked to the first output shaft 1311, and the other reduction device 15 is linked to the second output shaft 1321.

[0055] A second accommodating cavity 120 is formed in the connecting bridge tube 12 at both ends of the supporting bridge tube 11, and the two second accommodating cavities 120 are respectively connected to the first accommodating cavity 110. The first output shaft 1311 of the first electric drive assembly 131 and the second output shaft 1321 of the second electric drive assembly 132 can respectively extend to the corresponding second accommodating cavity 120. At this time, two corresponding reduction devices 15 can be arranged in the two second accommodating cavities 120, and the two reduction devices 15 are respectively linked to the first output shaft 1311 and the second output shaft 1321. The reduction device 15 linked to the motor output shaft is arranged in the second accommodating cavity 120, which can amplify the torque transmitted by the electric drive assembly and transmit the amplified torque to the corresponding wheel assembly 16, which helps to optimize power transmission and enables the wheel assembly 16 to obtain a speed and torque that is more suitable for driving conditions, thereby improving the acceleration performance and driving stability of the vehicle. The reduction device 15 is integrated in the second accommodating cavity 120 in the connecting bridge tube 12 and is directly linked to the output shaft of the electric drive assembly, making full use of the space inside the electric drive bridge assembly 1, avoiding the need for additional external installation space, and helping to maintain the overall compactness and weight reduction of the vehicle.

[0056] Furthermore, because the reduction gear 15 is independently configured and corresponds one-to-one with the output shaft of the electric drive assembly, it can be flexibly adjusted to suit different vehicle requirements and power configurations. For example, the appropriate reduction ratio of the reduction gear 15 can be selected based on factors such as wheel diameter and tire grip to achieve optimal power transmission.

[0057] According to one embodiment of the present invention, the connecting bridge tube 12 includes: a first connecting section 121 and a second connecting section 122, the first connecting section 121 is connected to the load-bearing bridge tube 11, and a second accommodating cavity 120 is formed in the first connecting section 121; one end of the connecting section is connected to the first connecting section 121, and the other end of the connecting section is connected to the wheel assembly 16; wherein, the diameter of the first connecting section 121 gradually decreases in the direction axially away from the load-bearing bridge tube 11.

[0058] The connecting bridge tube 12 is a key component in the electric drive axle assembly 1, and its design needs to take into account the spatial layout of the entire power system. Specifically, the connecting bridge tube 12 is provided with a first connecting section 121 and a second connecting section 122 that are connected to each other, wherein the first connecting section 121 is connected to the load-bearing bridge tube 11; the second connecting section 122 connects the first connecting section 121 to the wheel assembly 16. A second accommodating cavity 120 is provided inside the first connecting section 121, and the output shaft of the reduction device 15 can be connected to the wheel assembly 16 after passing through the second connecting section 122. It can also be understood that the first connecting section 121 is provided with structures such as the reduction device 15, while the second connecting section 122 only needs to be provided with structures such as the output shaft of the reduction device 15. Therefore, in order to avoid unnecessary waste of space, the second connecting section 122 can be appropriately made smaller, so that the axial cross-section of the second connecting section 122 is smaller than the axial cross-section of the first connecting section 121, which can reduce the volume occupied by the connecting section and improve the compactness of the structure of the electric drive axle assembly 1. For example, Figure 6 As shown, the second connecting section 122 can be designed as a square section, and the first connecting section 121 can be constructed as a variable diameter section with a diameter gradually decreasing in the direction axially away from the load-bearing bridge tube 11. The tapered diameter design helps to better arrange the positions of various components in a limited space, improve space utilization, and maintain the compactness of the electric drive axle assembly 1.

[0059] According to one embodiment of the present utility model, the first connecting section 121 includes: a first sub-segment 1211 and a second sub-segment 1212, the first sub-segment 1211 is connected to the load-bearing bridge tube 11, and a plurality of first mounting portions 12111 spaced circumferentially are provided on the first sub-segment 1211, and each first mounting portion 12111 is provided with a first mounting hole suitable for cooperating with the load-bearing bridge tube 11; the second sub-segment 1212 connects the first sub-segment 1211 with the second connecting section 122, and a plurality of second mounting portions 12121 spaced circumferentially are provided on the second sub-segment 1212, and each second mounting portion 12121 is provided with a second mounting hole suitable for cooperating with the housing of the reduction gear 15.

[0060] like Figure 6As shown, the first connecting segment 121 includes a first subsegment 1211 and a second subsegment 1212. The first subsegment 1211 connects to the load-bearing bridge tube 11, while the second subsegment 1212 connects the first subsegment 1211 to the second connecting segment 122. During processing, the axial cross-section of the first subsegment 1211 can be configured as a circle. Compared to other shapes, the circular design of the first subsegment 1211 helps define a larger second accommodating cavity 120, facilitating the assembly of the reduction gear 15 and other drive structures. The axial cross-section of the second subsegment 1212, facing the end of the second connecting segment 122, is configured as a square. This square cross-section conforms to the second connecting segment 122 and facilitates the connection between the first connecting segment 121 and the second connecting segment 122. The axial cross-section of the second subsegment 1212, facing the end of the first subsegment 1211, is configured as a circle, facilitating the connection between the second subsegment 1212 and the first subsegment 1211.

[0061] The first sub-segment 1211 is provided with multiple circumferentially spaced first mounting portions 12111, each of which is provided with a first mounting hole that mates with the load-bearing bridge tube 11. This ensures a secure connection between the first connecting segment 121 and the load-bearing bridge tube 11. Similarly, the second mounting portions 12121 and second mounting holes on the second sub-segment 1212 mate with the housing of the reduction gear 15, further enhancing the strength and stability of the connection. This multi-point connection helps disperse stress and improves the durability and reliability of the overall structure.

[0062] According to an embodiment of the present invention, a first reinforcement portion 12112 is provided between two adjacent first mounting portions 12111; a second reinforcement portion 12122 is provided between two adjacent second mounting portions 12121. Figure 6 As shown, when processing the first mounting portion 12111 and the second mounting portion 12121, a first reinforcement portion 12112 can be formed between two adjacent first mounting portions 12111. Similarly, a second reinforcement portion 12122 can also be formed between two adjacent second mounting portions 12121. The first reinforcement portion 12112 and the second reinforcement portion 12122 can be understood as being naturally formed during the processing of the first mounting portion 12111 and the second mounting portion 12121, respectively, without the need for additional processing, thereby reducing the difficulty of processing. The provision of the first reinforcement portion 12112 and the second reinforcement portion 12122 significantly enhances the structural strength and rigidity of the first connecting section 121. In the electric drive axle assembly 1, the connecting bridge tube 12 needs to withstand various forces and torques from the electric drive assembly, the reduction gear 15, and the wheel assembly 16. The reinforcement portion helps to disperse these loads by providing additional support and rigidity, preventing the connecting bridge tube 12 from structural deformation or damage, thereby ensuring the stability and reliability of the entire power system.

[0063] In some embodiments, a support platform 101 may be provided on the second connecting section 122 , and the support platform 101 may be used to support and assemble structures such as vehicle shock absorbers, thereby making the structural layout of the vehicle more compact.

[0064] In some embodiments, the reduction gear 15 and the electric drive assembly can form a drive system after being linked. The reduction gear 15 and the electric drive assembly can be simultaneously accommodated in the housing of the drive system. At this time, the housing of the drive system can be connected and fixed to the second mounting portion 12121. When connected, a flange stop can also be provided on the housing of the drive system to further improve the stability of the connection between the connecting bridge section and the housing of the drive system.

[0065] In some embodiments, the reduction gear 15 may adopt various gear transmission structure arrangements such as double-row planetary gear transmission and parallel axis gear transmission.

[0066] In some embodiments, the arrangement of the bearing member 115 can be determined according to actual bearing requirements, that is, there is no need to arrange the bearing member 115 in each connecting beam 113 .

[0067] In some embodiments, the wheel assembly 16 includes structures such as a dual-caliper brake and a hub bearing unit.

[0068] The vehicle according to the present invention is briefly described below.

[0069] The vehicle according to the present invention includes the electric drive axle assembly 1 of the above-described embodiment. Since the vehicle according to the present invention is provided with the electric drive axle assembly 1 of the above-described embodiment, the connection between the load-bearing bridge tube 11 and the connecting bridge tube 12 decouples the load on the bridge body from the load on the drive system housing. Vibration and impact during vehicle operation can be borne by the load-bearing bridge tube 11, thereby preventing damage to the electric drive assembly and improving vehicle safety. Furthermore, the coaxial arrangement of the two electric drive assemblies reduces the space occupied by the electric drive axle assembly 1, improving the compactness of the vehicle layout.

[0070] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0071] In the description of the present invention, "first feature" and "second feature" may include one or more such features.

[0072] In the description of the present invention, “plurality” means two or more.

[0073] In the description of the present invention, a first feature being “above” or “below” a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact via another feature therebetween.

[0074] In the description of the present invention, a first feature “above”, “above” and “above” a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0075] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the illustrative use of the above terms does not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0076] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. An electric drive axle assembly for a vehicle, characterized in that: include: A load-bearing bridge tube (11), wherein a first accommodating cavity (110) is formed in the load-bearing bridge tube (11) and is open at both ends in the axial direction; A connecting bridge pipe (12), the connecting bridge pipe (12) being arranged at both ends of the load-bearing bridge pipe (11); A first electric drive assembly (131) and a second electric drive assembly (132), wherein the first electric drive assembly (131) and the second electric drive assembly (132) are respectively arranged in the first accommodating cavity (110) and respectively connected to the connecting bridge tubes (12) at both ends of the load-bearing bridge tube (11); the first electric drive assembly (131) and the second electric drive assembly (132) are respectively provided with a first output shaft (1311) and a second output shaft (1321) passing through the connecting bridge tube (12); the first output shaft (1311) and the second output shaft (1321) are coaxial and respectively linked to the corresponding wheel assembly (16).

2. The electric drive axle assembly (1) for a vehicle according to claim 1, characterized in that: The load-bearing bridge tube (11) comprises: A first tube body portion (111) and a second tube body portion (112), wherein the first tube body portion (111) and the second tube body portion (112) are arranged at intervals and are respectively connected to the corresponding connecting bridge tube (12); a connecting portion, the connecting portion connecting the first tube body portion (111) and the second tube body portion (112); wherein The first tube body portion (111), the second tube body portion (112) and the connecting portion jointly define the first accommodating cavity (110).

3. The electric drive axle assembly (1) for a vehicle according to claim 2, characterized in that: The connecting portion is constructed as a plurality of connecting beams (113) spaced apart in the circumferential direction of the supporting bridge tube (11).

4. The electric drive axle assembly (1) for a vehicle according to claim 3, characterized in that: A hollow area (114) is formed between two adjacent connecting beams (113), a cavity is formed inside the connecting beam (113), a through hole (116) communicating with the cavity is provided on the first tube body portion (111) and / or the second tube body portion (112), and a bearing member (115) is optionally provided in the cavity.

5. The electric drive axle assembly (1) for a vehicle according to claim 2, characterized in that: A vibration-damping suspension (141) is provided on the connecting portion, and a motor controller (142) is provided on the vibration-damping suspension (141).

6. The electric drive axle assembly (1) for a vehicle according to claim 2, characterized in that: A second accommodating chamber (120) communicating with the first accommodating chamber (110) is formed in the connecting bridge tube (12), a reduction device (15) is provided in the second accommodating chamber (120), and the reduction devices (15) are constructed to correspond one to one with the second accommodating chamber (120), one of the reduction devices (15) is linked to the first output shaft (1311), and the other of the reduction devices (15) is linked to the second output shaft (1321).

7. The electric drive axle assembly (1) for a vehicle according to claim 6, characterized in that: The connecting bridge pipe (12) comprises: a first connecting section (121), the first connecting section (121) being connected to the load-bearing bridge tube (11), and the second accommodating cavity (120) being formed in the first connecting section (121); A second connecting section (122), one end of which is connected to the first connecting section (121), and the other end of which is connected to the wheel assembly (16); The diameter of the first connecting section (121) gradually decreases in the direction axially away from the supporting bridge tube (11).

8. The electric drive axle assembly (1) for a vehicle according to claim 7, characterized in that: The first connecting section (121) comprises: a first subsection (1211), the first subsection (1211) being connected to the load-bearing bridge tube (11), the first subsection (1211) being provided with a plurality of first mounting portions (12111) spaced apart in the circumferential direction, each of the first mounting portions (12111) being provided with a first mounting hole suitable for cooperating with the load-bearing bridge tube (11); A second sub-segment (1212), wherein the second sub-segment (1212) connects the first sub-segment (1211) with the second connecting segment (122), and the second sub-segment (1212) is provided with a plurality of second mounting portions (12121) spaced apart in the circumferential direction, and each of the second mounting portions (12121) is provided with a second mounting hole suitable for cooperating with the housing of the reduction gear (15).

9. The electric drive axle assembly (1) for a vehicle according to claim 8, characterized in that: A first reinforcing portion (12112) is provided between two adjacent first mounting portions (12111); and a second reinforcing portion (12122) is provided between two adjacent second mounting portions (12121).

10. A vehicle, characterized in that: The invention comprises the electric drive axle assembly (1) as described in any one of claims 1 to 9.

Images