Axle housing, axle housing assembly, drive axle and vehicle

Abstract

The present disclosure relates to a bridge package, a bridge housing assembly, a drive axle and a vehicle, the bridge package comprising a housing, the housing having a cavity inside for mounting a motor, a transmission and a differential, the cavity having a plurality of support positions for directly or indirectly supporting the rotation of the respective rotors of the motor, the transmission and the differential. The cavity of the housing of the bridge package of the present disclosure has a plurality of support positions for supporting the rotors of the motor, the transmission and the differential, which makes the support positions on the same rotor all located on the same housing, and further makes the support positions once formed by machining under the premise of the same design datum and process datum, ensuring the coaxiality of the support positions, and based on this, improving the working accuracy of the rotors in the bridge package and the transmission effect of the drive axle, and ensuring the product quality.

Description

Technical Field

[0001] This disclosure relates to the field of vehicle technology, and more specifically, to an axle housing, axle assembly, a drive axle, and a vehicle. Background Technology

[0002] A drive axle typically includes an axle housing, a reducer (transmission), a differential, and half-shafts. In related technologies, the axle housing usually comprises a motor housing for separately housing the motor, a middle section for housing the transmission and differential, and a half-shaft housing for the half-shafts to pass through. In this configuration, the two ends of the differential housing are typically mounted onto the middle section of the axle housing and the half-shaft housing, respectively. That is, the two bearings at both ends of the differential housing are designed into the middle section of the axle housing and the half-shaft housing, respectively. The middle section of the axle housing and the half-shaft housing are bolted together. The bearing positions of the differential are machined separately in each housing, requiring two machining operations, and then assembled into a single unit, resulting in poor coaxiality of the rotation centers of the two differential bearings. Summary of the Invention

[0003] The purpose of this disclosure is to provide an axle housing, axle housing assembly, a drive axle, and a vehicle that can improve the coaxiality of the support positions of each rotating body, improve the working accuracy of the rotating body and the transmission effect of the drive axle, so as to at least partially solve the above-mentioned technical problems.

[0004] To achieve the above objectives, a first aspect of this disclosure provides a bridge package including a housing having a chamber inside for mounting a motor, a transmission, and a differential, the chamber having a plurality of support positions for directly or indirectly supporting the rotation of each rotating element of the motor, the transmission, and the differential.

[0005] Optionally, the axle housing has two interfaces arranged coaxially, the two interfaces being used to connect to two half-shaft axle housings located on both sides of the axle housing respectively, the plurality of support positions including two differential support positions, the two differential support positions being used to support the connecting housing of the differential which is a rotating body, the two differential support positions being located between the two interfaces and arranged coaxially with the two interfaces.

[0006] Optionally, the chamber includes a first chamber for accommodating the motor, a second chamber for accommodating the transmission, and a third chamber for accommodating the differential, wherein there are two of each of the first and second chambers.

[0007] Optionally, the two first chambers and the two second chambers are symmetrically arranged about the central axis of the half-shaft of the differential connected to the third chamber.

[0008] Optionally, the first chamber has a motor support position for supporting the output shaft of the motor, which is configured as a rotating body; and / or, the second chamber has a transmission support position for supporting one or more drive shafts of the transmission, which are configured as rotating bodies; and / or, the third chamber has a differential support position for supporting the connecting housing of the differential, which is configured as a rotating body.

[0009] Optionally, the housing has an opening for the motor, transmission, and differential to pass through and be mounted within the housing, and the axle package further includes an end cap that covers the opening.

[0010] Optionally, the housing is a one-piece structure.

[0011] A second aspect of this disclosure provides a bridge housing assembly, comprising: the aforementioned bridge housing; and a half-shaft bridge housing connected to an interface of the bridge housing.

[0012] Optionally, the interface is constructed as a cylindrical body, with the end of the half-shaft bridge housing inserted into the cylindrical body, or the cylindrical body is inserted into the end of the half-shaft bridge housing.

[0013] Optionally, the cylinder and / or the half-shaft bridge housing has a connecting portion configured to connect the cylinder and the half-shaft bridge housing, or the connecting portion is configured to cooperate with a connector to connect the cylinder and the half-shaft bridge housing.

[0014] Optionally, the cylinder and / or the half-shaft bridge housing has four regions arranged around its own central axis, the four regions including a tensile stress layer region and a compressive stress layer region arranged opposite each other in the Z direction, and two neutral layer regions arranged opposite each other in the X direction, the connection being arranged in at least one of the neutral layer regions.

[0015] Optionally, the connecting portion includes a plug weld hole to allow the cylinder body and the half-shaft axle housing to be connected by plug weld; or, the connecting portion includes a connecting hole for engaging with a connector to connect the cylinder body and the half-shaft axle housing.

[0016] Optionally, the number of plug weld holes is two, and they are respectively located in two neutral layer regions.

[0017] Optionally, the number of the half-shaft bridge housings is two, and they are symmetrically arranged on both sides of the housing along the central axis of the half-shaft bridge housing.

[0018] A third aspect of this disclosure provides a drive axle including a motor, a transmission, a differential, a half-shaft, and the aforementioned axle housing assembly, wherein the half-shaft passes through the half-shaft axle housing to be connected to the differential, and the motor drives the half-shaft to rotate sequentially through the transmission and the differential.

[0019] Optionally, there are two motors and two transmissions, and the two motors and two transmissions are arranged symmetrically about the central axis of the half-shaft in the X direction.

[0020] A fourth aspect of this disclosure provides a vehicle including the aforementioned drive axle.

[0021] Through the above technical solution, the housing of the axle assembly disclosed herein is designed to simultaneously accommodate the motor, transmission, and differential, which facilitates the integrated and lightweight design of the drive axle. Furthermore, the housing has multiple support positions for supporting the rotating parts of the motor, transmission, and differential. This ensures that all support positions on the same rotating part are located on the same housing, allowing the support positions to be machined in a single step under the same design and manufacturing standards. This guarantees the coaxiality of the support positions, thereby improving the working accuracy of the rotating parts within the axle assembly and the transmission effect of the drive axle, thus ensuring product quality.

[0022] Other features and advantages of this disclosure will be described in detail in the following detailed description section. Attached Figure Description

[0023] The accompanying drawings are provided to further illustrate the present disclosure and form part of the specification. They are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation thereof. In the drawings:

[0024] Figure 1 This is a first-view structural diagram of the bridge package provided in an embodiment of this disclosure;

[0025] Figure 2 yes Figure 1 A magnified view of a section at point A in the middle;

[0026] Figure 3 This is a second-view structural diagram of the bridge package provided in an embodiment of this disclosure;

[0027] Figure 4 yes Figure 3 A magnified view of a section at point B in the middle;

[0028] Figure 5 This is a schematic diagram of the neutral layer region of the cylinder and / or half-shaft bridge housing provided in the embodiments of this disclosure.

[0029] Explanation of reference numerals in the attached figures

[0030] 1-Housing; 2-Cavity; 201-First Chamber; 202-Second Chamber; 203-Third Chamber; 3-Motor; 301-Output Shaft; 4-Gearbox; 401-Drive Shaft; 5-Differential; 501-Connecting Housing; 6-Rotating Body; 7-Support Position; 701-Differential Support Position; 702-Motor Support Position; 703-Gearbox Support Position; 8-Interface; 9-Half-Shaft Bridge Housing; 10-Connecting Part; 11-Tension Stress Layer Region; 12-Compressive Stress Layer Region; 13-Neutral Layer Region; 14-Cylinder; 15-First Opening; 16-First End Cap. Detailed Implementation

[0031] The specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.

[0032] In this disclosure, unless otherwise stated, directional terms such as "inner" and "outer" refer to "inner" and "outer" relative to the contour of the corresponding component itself. Furthermore, the terms "first," "second," and "third," etc., used in this disclosure are for distinguishing one element from another and do not have sequential or importance implications. In this disclosure, the X-direction refers to the forward and backward direction of the vehicle, and the Z-direction is the vertical direction. Additionally, in the following description, when referring to the accompanying drawings, unless otherwise explained, the same reference numerals in different drawings denote the same or similar elements. The above definitions are for explanation and illustration only and should not be construed as limiting this disclosure.

[0033] like Figures 1 to 5 As shown, in a first aspect, this disclosure provides an axle housing, comprising: a housing 1 and a chamber 2 located inside the housing 1, wherein the chamber 2 is used to mount a motor 3, a transmission 4, and a differential 5, and the chamber 2 has multiple support positions 7 for directly or indirectly supporting the rotation of each rotating body 6 of the motor 3, the transmission 4, and the differential 5. This allows the support positions 7 of each rotating body 6 of the motor 3, the transmission 4, and the differential 5 to be all within the same housing 1. For example, both support positions 7 of the rotating body 6 of the differential 5 can be located within the housing 1. Compared to related technologies where the two support positions of the differential's rotating body are located in the middle section of the axle housing and the half-shaft axle housing respectively, this disclosure allows the support positions 7 to be machined in one step under the same design and manufacturing standards, thereby ensuring the coaxiality of the support positions 7. Based on this, the working accuracy of the rotating body 6 within the axle housing and the transmission effect of the drive axle are improved, ensuring product quality.

[0034] It should be noted that support components such as bearings can be installed on support position 7 to indirectly support the rotating body 6. Of course, support position 7 can also directly support the rotating body 6.

[0035] In some embodiments, the motor 3 drives the half-shaft to rotate sequentially through the transmission 4 and the differential 5. The motor 3 drives the housing connected to the differential 5 through the transmission 4, so as to drive the half-shaft connected to the half-shaft gear inside the differential 5 to rotate by driving the rotation of the housing of the differential 5. Thus, the housing of the differential 5 (which may be referred to as the connecting housing 501 in this disclosure) is the rotating body 6 of the differential 5, and the two support positions 7 for supporting the rotating body 6 of the differential 5 are both located inside the housing 1.

[0036] For example, in some embodiments, the plurality of support positions 7 include two differential support positions 701, which support the connecting housing 501 of the differential 5, which is a rotating body 6. In this way, both differential support positions 701 are located inside the housing, which can improve the coaxiality of the two differential support positions 701 or the two bearings located in the two differential support positions 701 respectively.

[0037] For example, in some specific implementations, such as Figure 4 As shown, the axle housing has two coaxially arranged interfaces 8, which are used to connect to two half-shaft axle housings 9 located on both sides of the axle housing. Two differential support positions 701 are located between the two interfaces 8 and are coaxially arranged with the two interfaces 8. Since the axle housing assembly of the drive axle is assembled from the axle housing and the half-shaft axle housing, and the differential 5 needs to be connected to the half-shaft axle housing, in related technologies, the two differential support positions 701 of the differential 5 are located in the axle housing and the half-shaft axle housing, respectively, which affects the coaxiality of the differential support positions 701 and results in poor working accuracy of the differential 5. However, in this disclosure, both differential support positions 701 are set inside the axle housing, which ensures the coaxiality of the two differential support positions 701 and the working accuracy of the differential 5.

[0038] In some embodiments, the chamber 2 includes a first chamber 201 for accommodating the motor 3, a second chamber 202 for accommodating the transmission 4, and a third chamber 203 for accommodating the differential 5. There are two first chambers 201 and two second chambers 202. The design of the two chambers allows the drive axle with this axle package to be configured as a dual-motor drive axle as needed. The dual-motor drive axle can output higher torque, thereby improving the performance and applicability of the drive axle.

[0039] The two first chambers 201 and the two second chambers 202 are symmetrically arranged about the central axis of the half-shaft (not shown in the figure) of the differential 5 connected in the third chamber 203. The symmetrical arrangement of the first chambers 201 and the second chambers 202 can make the force on both sides of the axle more even, ensuring the stability of the axle during operation. On the other hand, it can also make the molding and assembly of the axle more convenient.

[0040] To improve the working accuracy of at least one of the motor 3, transmission 4, and differential 5, thereby enhancing the working accuracy of the drive axle, the first chamber 201 of this disclosure has a motor support position 702 for supporting the output shaft 301 of the motor, which is a rotating body 6; and / or, the second chamber 202 has a transmission support position 703 for supporting one or more drive shafts 401 of the transmission 4, which is a rotating body 6; and / or, the third chamber 203 has a differential support position 701 for supporting the connecting housing 501 of the differential 5, which is a rotating body. Of course, when the motor support position 702, transmission support position 703, and differential support position 701 are all present and used to support the rotating bodies 6 of the motor 3, transmission 4, and differential 5, the working accuracy of the drive axle is higher, and the transmission effect is better.

[0041] Furthermore, it should be noted that although the motor support 702, transmission support 703, and differential support 701 are all located within the housing 1, the housing may have openings for the motor, transmission, and differential to pass through and be installed within the housing in order to facilitate the assembly and wiring of the motor 3, transmission 4, and differential 5. The axle package may also include end caps that cover the openings. The number of openings and end caps may be at least one, for example, as shown in the example... Figure 1 and Figure 3 As shown, the housing may have a first opening 15 communicating with the first cavity, and the bridge package may include a first end cap 16 covering the first opening 15 to facilitate the assembly of the motor and motor wiring, etc. In an embodiment not shown, a second opening may also be provided at the top of the housing along the Z direction, and the bridge package may include a second end cap covering the second opening to facilitate the installation of the motor 3, the transmission 4 and / or the differential 5 into the housing.

[0042] In some embodiments, the housing can be a one-piece structure, for example, it can be made by machining, one-piece die casting, etc., but this disclosure is not limited thereto.

[0043] A second aspect of this disclosure provides a bridge housing assembly including the aforementioned bridge package and a half-shaft bridge housing 9 connected to an interface 8 of the bridge package. This bridge housing assembly has all the beneficial effects of the bridge package, which will not be elaborated further in this disclosure.

[0044] In embodiments of this disclosure, such as Figures 1 to 4As shown, interface 8 can be constructed as a cylindrical body 14, with the end of the half-shaft axle housing 9 inserted into the cylindrical body 14, or the cylindrical body 14 inserted into the end of the half-shaft axle housing 9. The half-shaft axle housing 9 and the cylindrical body 14 are connected by an insertion method. Compared with the bolted connection method used in related technologies, this avoids the problem of bolts loosening due to various alternating forces (such as preload, tensile stress, and tension stress), which could lead to poor reliability of the axle housing assembly. This ensures the stability of the half-shaft axle housing 9 after it is connected to the axle housing.

[0045] The half-shaft axle housing 9 and the cylinder 14 can be connected by an interference fit to ensure the insertion effect of the two and prevent them from falling off. In order to avoid excessive stress concentration in the insertion area of ​​the half-shaft axle housing 9 and the cylinder 14 and the problem of breakage, the insertion depth of the two can be extended as much as possible, so as to distribute the force on the half-shaft axle housing 9 and the cylinder 14 in a unit area and improve the safety of the axle housing assembly.

[0046] Of course, since the transmission system is located within the axle housing, it is possible to, for example Figure 2 As shown, the half-shaft axle housing 9 and the cylinder 14 are connected by inserting the end of the half-shaft axle housing 9 into the cylinder 14. This connection method allows the cross-section of the cylinder 14 to be larger than the cross-section of the end of the half-shaft axle housing 9, thereby increasing the overall rigidity of the axle housing and making the axle housing assembly more stable during operation.

[0047] In some embodiments, to further enhance the stability of the cylinder 14 and the half-shaft bridge housing 9 after connection, the cylinder 14 and / or the half-shaft bridge housing 9 are provided with a connecting portion 10, which is configured to connect the cylinder 14 and the half-shaft bridge housing 9, or the connecting portion 10 is configured to cooperate with a connector to connect the cylinder 14 and the half-shaft bridge housing 9.

[0048] In some embodiments of this disclosure, the cylinder 14 and / or the half-shaft bridge housing 9 have four regions arranged around their own central axis, such as Figure 5 As shown, the four regions include a tensile stress layer region 11 and a compressive stress layer region 12 arranged opposite each other in the Z direction, and two neutral layer regions 13 arranged opposite each other in the X direction. Since the neutral layer region 13 is not easily affected by tensile and compressive stresses, the connecting part 10 can be arranged in at least one of the neutral layer regions. Taking the cross-section of the cylinder 14 and / or the half-shaft bridge shell 9 as an example, it has a virtual horizontal plane L passing through the center of its cross-section circle and two virtual straight lines M and N intersecting the center of the cross-section circle in an "X" shape. The angle between the two virtual straight lines and the virtual horizontal plane is 45°. The two virtual straight lines divide the circumferential region into four regions, wherein, as shown in the figure... Figure 5As shown, the upper region is the compressive stress region, the lower region is the tensile stress region, and the left and right sides are the neutral layer regions. Furthermore, the Z-axis can be referenced to the vehicle's height, the X-axis to the vehicle's length, and the extension direction of the half-shaft's central axis to the vehicle's width.

[0049] The connecting part 10 may include plug weld holes so that the cylinder 14 and the half-shaft bridge housing 9 can be connected by plug weld. There can be two plug weld holes, which are respectively set in two neutral layer areas. This increases the number of plug weld points, making the connection between the cylinder 14 and the half-shaft bridge housing 9 more secure, and also avoids the situation where too many plug weld holes are set in the neutral layer area 13 on the same side, which would affect the strength of the cylinder 14 or the half-shaft bridge housing 9 itself.

[0050] Alternatively, the connecting part 10 may include a connecting hole for engaging with a connector to connect the cylinder and the half-shaft bridge housing 9. For example, the connecting hole may be a threaded hole, and the connector may be configured as a screw or bolt to ensure the stability of the cylinder and the half-shaft bridge housing after connection.

[0051] In some embodiments of this disclosure, there are two half-shaft axle housings 9, which are symmetrically arranged on both sides of the housing along the central axis of the half-shaft axle housing 9. The axle housing is located exactly at the center of the entire axle housing assembly, so that the strain of the two half-shaft axle housings 9 is basically the same, thereby making the float of the axle housing assembly basically the same, ensuring that the axle housing assembly can basically maintain its working state under non-load conditions, and improving the stability of the axle housing assembly.

[0052] A third aspect of this disclosure provides a drive axle including a motor 3, a transmission 4, a differential 5, a half-shaft (not shown in the figure), and the aforementioned axle housing assembly. The half-shaft passes through a half-shaft axle housing 9 to connect to the differential 5. The motor 3 drives the half-shaft to rotate sequentially through the transmission 4 and the differential 5. This drive axle has all the beneficial effects of the aforementioned axle housing assembly, which will not be elaborated further in this disclosure.

[0053] like Figure 1 and Figure 3 As shown, the transmission 4 can be configured as a parallel shaft cylindrical gear transmission. The parallel shaft cylindrical gear transmission includes a first transmission part and a second transmission part. The first transmission part includes a first transmission shaft connected to the output shaft 301 of the motor 3 and a first transmission gear sleeved on the first transmission shaft. The second transmission part includes a second transmission shaft disposed between the first transmission shaft and the differential 5. A second transmission gear and a third transmission gear are sleeved on the second transmission shaft. The second transmission gear meshes with the first transmission gear, and the third transmission gear drives an external gear connected to the housing of the differential 5.

[0054] In the embodiments of this disclosure, there are two motors and two gearboxes. The two motors 3 and the two gearboxes 4 are arranged symmetrically along the X-direction about the central axis of the half-shaft. That is, this drive axle is a dual-motor drive axle. The two motors 3 can be selected to operate one or both of them to drive the drive axle as needed, thereby improving the performance and applicability of the drive axle.

[0055] A fourth aspect of this disclosure provides a vehicle including the aforementioned drive axle, which has all the beneficial effects of the aforementioned drive axle, which will not be repeated here.

[0056] In summary, the housing 1 disclosed herein can not only be used to install the motor 3, the transmission 4, and the differential 5, but also has multiple support positions 7 for supporting the rotating body 6 of the above three components. This allows the support positions 7 to be machined together with the housing 1 in one step, ensuring the coaxiality of the bearings set on the support positions 7, thereby improving the working accuracy of the motor 3, the transmission 4, and the differential 5. In addition, the axle housing adopts a plug-in and plug-welding connection method with the half-shaft axle housing, making the connection between the axle housing and the half-shaft axle housing more stable, thereby ensuring the rigidity and quality of the entire axle housing assembly.

[0057] The preferred embodiments of this disclosure have been described in detail above with reference to the accompanying drawings. However, this disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this disclosure, various simple modifications can be made to the technical solutions of this disclosure, and these simple modifications all fall within the protection scope of this disclosure.

[0058] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately.

[0059] Furthermore, various different embodiments of this disclosure can be combined in any way, as long as they do not violate the spirit of this disclosure, they should also be regarded as the content disclosed in this disclosure.

Claims

1. A bridge housing assembly, characterized in that, include: A bridge package, the bridge package including a housing (1), the housing (1) having a chamber (2) inside for mounting a motor, a transmission and a differential, the chamber (2) having a plurality of support positions (7) for directly or indirectly supporting the rotation of each rotating body (6) of the motor (3), the transmission (4) and the differential (5). and The half-shaft bridge housing (9) is connected to the interface (8) of the bridge package. The interface (8) is constructed as a cylindrical body (14), and the end of the half-shaft bridge housing (9) is inserted into the cylindrical body (14), or the cylindrical body (14) is inserted into the end of the half-shaft bridge housing (9); The cylinder (14) and / or the half-shaft bridge housing (9) have a connecting part (10) configured to connect the cylinder (14) and the half-shaft bridge housing (9), or the connecting part (10) is configured to cooperate with a connector to connect the cylinder (14) and the half-shaft bridge housing (9). The cylinder (14) and / or the half-shaft bridge shell (9) have four regions arranged around their own central axis, the four regions including a tensile stress layer region (11) and a compressive stress layer region (12) arranged opposite each other in the Z direction, and two neutral layer regions (13) arranged opposite each other in the X direction, the connecting part (10) being arranged in at least one of the neutral layer regions (13).

2. The bridge housing assembly according to claim 1, characterized in that, The axle assembly has two coaxially arranged interfaces (8), which are used to connect to the two half-shaft axle housings (9) located on both sides of the axle assembly. The plurality of support positions (7) include two differential support positions (701), which are used to support the connecting housing (501) of the differential (5) which is a rotating body (6). The two differential support positions (701) are located between the two interfaces (8) and are coaxially arranged with the two interfaces (8).

3. The bridge housing assembly according to claim 1, characterized in that, The chamber (2) includes a first chamber (201) for accommodating the motor (3), a second chamber (202) for accommodating the transmission (4) and a third chamber (203) for accommodating the differential (5), with two of each of the first chamber (201) and the second chamber (202).

4. The bridge housing assembly according to claim 3, characterized in that, The two first chambers (201) and the two second chambers (202) are arranged symmetrically about the central axis of the half-shaft of the differential (5) connected in the third chamber (203).

5. The bridge housing assembly according to claim 3 or 4, characterized in that, The first chamber (201) has a motor support position (702) for supporting the output shaft (301) of the motor, which is a rotating body (6); and / or, The second chamber (202) has a transmission support (703) for supporting one or more drive shafts (401) of the transmission (4) which are configured as a rotating body (6); and / or, The third chamber (203) has a differential support position (701), which is used to support the connecting housing (501) of the differential (5) which is a rotating body.

6. The bridge housing assembly according to claim 1, characterized in that, The housing (1) has an opening for the motor (3), transmission (4) and differential (5) to pass through and be installed in the housing (1), and the bridge package also includes an end cap that covers the opening.

7. The bridge housing assembly according to claim 1, characterized in that, The shell (1) is an integral structure.

8. The bridge housing assembly according to claim 1, characterized in that, The connecting part (10) includes a plug weld hole so that the cylinder (14) and the half-shaft bridge housing (9) are connected by plug weld, or the connecting part (10) includes a connecting hole for cooperating with a connector to connect the cylinder and the half-shaft bridge housing (9).

9. The bridge housing assembly according to claim 8, characterized in that, The number of plug weld holes is two, and they are respectively located in the two neutral layer regions (13).

10. The bridge housing assembly according to claim 1, characterized in that, The number of the half-shaft bridge housings (9) is two, and they are symmetrically arranged on both sides of the housing along the central axis of the half-shaft bridge housings (9).

11. A drive axle, characterized in that, The assembly includes a motor (3), a transmission (4), a differential (5), a half shaft, and an axle housing assembly as described in any one of claims 1-10, wherein the half shaft passes through the half shaft axle housing (9) to be connected to the differential (5), and the motor (3) drives the half shaft to rotate in sequence through the transmission (4) and the differential (5).

12. The drive axle according to claim 11, characterized in that, The number of motors and the number of transmissions are both two, and the two motors (3) and the two transmissions (4) are arranged symmetrically about the central axis of the half shaft in the X direction.

13. A vehicle, characterized in that, Includes the drive axle as described in claim 11 or 12.

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