Single-motor double-intermediate-axle electric drive axle system and vehicle with same

Abstract

The application provides a single-motor double-intermediate-axle electric drive axle system and a vehicle with the same. The electric drive axle system comprises a motor, an input gear, two intermediate axle assemblies, and a differential assembly. The motor has a motor rotor and a motor stator. The input gear is fixedly connected with the motor rotor. The intermediate axle assemblies comprise intermediate shafts, driven gears and intermediate gears. The driven gears are fixedly connected with the intermediate shafts, and the driven gears are engaged with the input gear. The intermediate gears are connected with the intermediate shafts, and the two intermediate shafts are arranged in parallel. The differential assembly comprises at least a differential gear and a differential housing. The differential gear is arranged in engagement with the intermediate gears. The differential housing and the differential gear surround an installation cavity. A differential is arranged in the installation cavity. The differential has a first output shaft and a second output shaft. The first output shaft is used for driving a left wheel of the vehicle, and the second output shaft is used for driving a right wheel of the vehicle. The intermediate shafts are arranged to reduce the manufacturing cost.

Description

Technical Field

[0001] This invention relates to the field of vehicle electric drive axle structure design technology, and more specifically, to a single-motor dual-intermediate-shaft electric drive axle system and a vehicle having the same. Background Technology

[0002] Currently, electrification has become a consensus in the automotive industry as the future development direction. As an independent electric drive assembly product, the electric drive axle can simplify the transmission system and improve the overall vehicle efficiency, making it one of the future development directions. Existing electric drive axle products mainly fall into several structural forms: single-motor coaxial single-speed reduction, single-motor parallel-shaft single-speed or multi-speed transmission, and dual-motor parallel-shaft single-speed or multi-speed transmission.

[0003] Single-motor coaxial single-gear reduction typically uses a "single motor + planetary gear set" structure. Its advantages include a compact structure and ease of vehicle layout; however, the manufacturing and assembly processes for planetary gears are complex, and single-gear reduction places high demands on motor performance, resulting in a larger motor size and higher cost for the same requirements. Single-motor parallel-shaft drive axles come in single-gear and multi-gear configurations depending on the number of gears. Their advantage is that the parallel shaft replaces the planetary gear set, avoiding manufacturing and assembly issues. However, their disadvantages include an off-center transmission structure, uneven weight distribution, which negatively impacts vehicle handling and places higher demands on axle housing strength and sealing performance. Dual-motor parallel-shaft axles also come in single-gear and multi-gear configurations. Their advantages include avoiding the weight imbalance problem of single-motor parallel-shaft structures, improving handling, and lower manufacturing and assembly difficulty for parallel-shaft structures. However, the disadvantages include the addition of a motor, resulting in higher cost, larger space requirements, and difficulties in vehicle layout; they are generally used in commercial vehicles.

[0004] There is currently no effective solution to the problems of high manufacturing cost and complex manufacturing process of the electric drive bridge system in the above-mentioned technologies. Summary of the Invention

[0005] The main objective of this invention is to provide a single-motor dual-intermediate-shaft electric drive axle system and a vehicle having the same, in order to solve the problems of high manufacturing cost and complex manufacturing process of existing electric drive axle systems.

[0006] To achieve the above objectives, according to one aspect of the present invention, a single-motor dual-intermediate-shaft electric drive axle system is provided, comprising: a motor having a motor rotor and a motor stator, the axis of the motor rotor being coaxial with the axis of the vehicle axle; an input gear fixedly connected to the motor rotor; and an intermediate shaft assembly comprising two intermediate shaft assemblies, each intermediate shaft assembly including an intermediate shaft, a driven gear, and an intermediate gear, the driven gear being fixedly connected to the intermediate shaft and meshing with the input gear, and at least one intermediate gear being connected to the intermediate shaft, the intermediate shaft being capable of... The intermediate gear is driven to rotate, and the two intermediate shafts are arranged in parallel. The differential assembly includes at least a differential gear and a differential housing. The differential gear meshes with the intermediate gear. There is at least one differential gear. The differential housing is connected to the differential gear. The differential housing and the differential gear form a mounting cavity. The differential is arranged in the mounting cavity. The differential has a first output shaft and a second output shaft. The first output shaft is used to drive the left wheel of the vehicle, and the second output shaft is used to drive the right wheel of the vehicle. The motor rotor, input gear, first output shaft and second output shaft are arranged coaxially.

[0007] Furthermore, the differential includes: a differential shaft extending radially along the differential housing, the differential shaft being disposed within a mounting cavity, and both ends of the differential shaft being connected to the inner wall of the differential housing; two planetary gears disposed within the mounting cavity, the two planetary gears being spaced apart and passing through the differential shaft; and two output gears, each output gear meshing with the two planetary gears, one output gear being connected to a first output shaft, and the other output gear being connected to a second output shaft.

[0008] Furthermore, a first locking mechanism is provided on either of the two output gears, and the differential assembly also includes: a connecting ring, which is disposed in the mounting cavity and fixedly connected to the inner wall of the differential housing, and the connecting ring is provided with a second locking mechanism; the first locking mechanism and the second locking mechanism have a locking position that engages with each other and a releasing position that disengages from each other.

[0009] Furthermore, there are two intermediate gears, which are loosely fitted onto the intermediate shaft at an interval. Each of the two intermediate gears is provided with a first connecting mechanism. The intermediate shaft assembly also includes a synchronizing device, which is fixedly connected to the intermediate shaft. The synchronizing device is provided with a second connecting mechanism and is located between the two intermediate gears. The second connecting mechanism is connected to any one of the first connecting mechanisms to drive the corresponding intermediate gear to rotate.

[0010] Furthermore, there are two differential gears. The first end of the differential housing is connected to one of the differential gears, and the second end of the differential housing is connected to the other differential gear. The two differential gears and the differential housing form an installation cavity.

[0011] Furthermore, the radii of the two intermediate gears are set to be different.

[0012] Furthermore, there is one intermediate gear, which is fixedly connected to the intermediate shaft.

[0013] Furthermore, the axes of the two intermediate shafts are in the same plane as the axis of the input gear.

[0014] Furthermore, the axes of the two intermediate shafts are set at an angle to the line connecting them to the axis of the input gear.

[0015] According to another aspect of the present invention, a vehicle is provided having an electric drive axle system, which is the single-motor dual-intermediate-shaft electric drive axle system described above.

[0016] By applying the technical solution of this invention, a single-motor dual-intermediate-shaft electric drive axle system is adopted. The two intermediate shafts are arranged in parallel, and the motor rotor, input gear, first output shaft and second output shaft are arranged coaxially. The two intermediate shafts can realize power splitting. Under the same driving conditions, the electric drive axle system has higher strength and reliability. Moreover, the symmetrical arrangement of the two intermediate shafts can prevent the electric drive axle system from unbalanced load and center of gravity shift, improve driving and handling performance, and reduce manufacturing costs. Attached Figure Description

[0017] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0018] Figure 1 A schematic diagram of a first embodiment of the single-motor dual-intermediate-shaft electric drive bridge system according to the present invention is shown.

[0019] Figure 2 A schematic diagram of a first embodiment of the positional relationship between the intermediate shaft and the axis of the input gear according to the present invention is shown;

[0020] Figure 3 A schematic diagram of a second embodiment of the positional relationship between the intermediate shaft and the axis of the input gear according to the present invention is shown;

[0021] Figure 4 A schematic diagram of a second embodiment of the single-motor dual-intermediate-shaft electric drive bridge system according to the present invention is shown.

[0022] Figure 5 A schematic diagram of a third embodiment of the single-motor dual-intermediate-shaft electric drive bridge system according to the present invention is shown.

[0023] Figure 6A schematic diagram of a fourth embodiment of the single-motor dual-intermediate-shaft electric drive bridge system according to the present invention is shown.

[0024] The above figures include the following reference numerals:

[0025] 11. Motor stator; 12. Motor rotor;

[0026] 2. Input gear;

[0027] 3. Intermediate shaft assembly; 30. Intermediate shaft; 31. Driven gear; 32. Intermediate gear; 33. Synchronizing device;

[0028] 4. Differential assembly; 41. Differential housing; 410. Mounting cavity; 411. Differential shaft; 42. Differential gear; 43. Planetary gear; 44. Output gear; 45. Connecting ring;

[0029] 51. First output shaft; 52. Second output shaft;

[0030] 6. Bearings. Detailed Implementation

[0031] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0032] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0033] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0034] Exemplary embodiments according to this application will now be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments may be implemented in many different forms and should not be construed as being limited to the embodiments set forth herein. It should be understood that these embodiments are provided so that the disclosure of this application is thorough and complete, and that the concept of these exemplary embodiments is fully conveyed to those skilled in the art. In the drawings, for clarity, the thickness of layers and regions may be exaggerated, and the same reference numerals are used to denote the same devices, and therefore their description will be omitted.

[0035] Combination Figures 1 to 6 As shown, according to a specific embodiment of this application, a single-motor dual-intermediate-shaft electric drive bridge system is provided.

[0036] The single-motor dual-intermediate-shaft electric drive axle system includes a motor, an input gear 2, an intermediate shaft assembly 3, and a differential assembly 4. The motor has a rotor 12 and a stator 11, with the axis of the rotor 12 coaxial with the axis of the vehicle axle. The input gear 2 is fixedly connected to the rotor 12. There are two intermediate shaft assemblies 3, each including an intermediate shaft 30, a driven gear 31, and an intermediate gear 32. The driven gear 31 is fixedly connected to the intermediate shaft 30 and meshes with the input gear 2. At least one intermediate gear 32 is connected to the intermediate shaft 30, allowing the intermediate shaft 30 to drive the intermediate gear 32 to rotate. The intermediate shafts 30 are arranged parallel to each other; the differential assembly 4 includes at least a differential gear 42 and a differential housing 41. The differential gear 42 is meshed with the intermediate gear 32. There is at least one differential gear 42. The differential housing 41 is connected to the differential gear 42. The differential housing 41 and the differential gear 42 surround a mounting cavity 410. A differential is provided in the mounting cavity 410. The differential has a first output shaft 51 and a second output shaft 52. The first output shaft 51 is used to drive the left wheel of the vehicle, and the second output shaft 52 is used to drive the right wheel of the vehicle. The motor rotor 12, the input gear 2, the first output shaft 51 and the second output shaft 52 are arranged coaxially.

[0037] The technical solution of this embodiment adopts a single-motor dual-intermediate-shaft electric drive axle system. The two intermediate shafts 30 are arranged in parallel, and the motor rotor 12, input gear 2, first output shaft 51 and second output shaft 52 are arranged coaxially. The two intermediate shafts 30 can realize power splitting. Under the same driving conditions, the electric drive axle system has higher strength and reliability. Moreover, the symmetrical arrangement of the two intermediate shafts 30 can prevent the electric drive axle system from the problems of off-center load and center of gravity shift, improve driving and handling performance, and reduce manufacturing costs.

[0038] It should be noted that in this embodiment, the axis of the motor rotor 12 is on the same axis as the axis of the vehicle axle, which can reduce costs and eliminate structural offset and center of gravity shift. The use of a double intermediate shaft assembly 3 for transmission can achieve power splitting, improve the structural strength of the electric drive axle system, and reduce the size of the relevant shaft teeth and the volume space occupied under the same performance requirements. The two intermediate shafts 30 are arranged in parallel, and the two intermediate shaft assemblies 3 are structurally identical, which makes the structure symmetrical, avoids the phenomenon of uneven load, and improves the handling performance. The structural design of the intermediate shaft assembly 3 in this embodiment, which uses shaft gears for transmission, can reduce the difficulty of shaft gear manufacturing and assembly process.

[0039] Specifically, the differential includes a differential shaft 411, planetary gears 43, and output gears 44. The differential shaft 411 extends radially along the differential housing 41 and is disposed within the mounting cavity 410. Both ends of the differential shaft 411 are connected to the inner wall of the differential housing 41. There are two planetary gears 43, which are disposed within the mounting cavity 410 and pass through the differential shaft 411 at a distance. There are also two output gears 44, each of which meshes with two planetary gears 43. One output gear 44 is connected to the first output shaft 51, and the other output gear 44 is connected to the second output shaft 52. By setting the differential shaft 411, the power can be transmitted from the motor to the intermediate shaft 30, and then transmitted along the intermediate gear 32, differential gear 42, and differential housing 41 to the differential shaft 411, thereby driving the planetary gear 43 and the output gear 44 to rotate, realizing power output. The two output gears 44 respectively drive the first output shaft 51 and the second output shaft 52 to rotate, thereby driving the wheels connected to the first output shaft 51 and the second output shaft 52 to rotate.

[0040] It should be noted that the wheels connected to the first output shaft 51 and the second output shaft 52 can be the front and rear wheels of the vehicle, or the left and right wheels. Through the arrangement of the differential shaft 411, planetary gear 43, and output gear 44, the two wheels connected to the first output shaft 51 and the second output shaft 52 can rotate at different speeds, facilitating vehicle cornering and driving on uneven surfaces, thus improving the user experience.

[0041] Furthermore, a first locking mechanism is provided on either of the two output gears 44. The differential assembly 4 also includes a connecting ring 45, which is disposed within the mounting cavity 410 and fixedly connected to the inner wall of the differential housing 41. The connecting ring 45 is provided with a second locking mechanism. The first locking mechanism and the second locking mechanism have a locking position that engages with each other and a releasing position that disengages from each other. In this embodiment, the first locking mechanism and the second locking mechanism are used to realize the function of the differential lock. Integrating the differential lock within the differential assembly 4 can improve the vehicle's ability to get out of trouble and its off-road capability. For example, when either of the left or right wheels of the vehicle slips or spins freely, the first locking mechanism and the second locking mechanism can engage with each other to make the first output shaft 51 and the second output shaft 52 rigidly connected, thereby effectively transmitting power to the wheel connected to the first output shaft 51 and the second output shaft 52. After the vehicle gets out of trouble, adjusting the first locking mechanism and the second locking mechanism to the disengaged release position will restore the normal differential function.

[0042] Specifically, the first locking mechanism is the gear structure of the output gear 44 itself, and the second locking mechanism is the spline or dog tooth structure on the connecting ring 45. The single motor dual intermediate shaft electric drive bridge system is also provided with a first operating mechanism. The first operating mechanism can push the connecting ring 45 to move so that the connecting ring 45 is connected to the output gear 44 through the spline or dog tooth structure. It should be noted that when the connecting ring 45 moves, part of the connecting ring 45 is fixedly connected to the inner wall of the differential housing 41 so that after the connecting ring 45 is connected to the output gear 44, the output gear 44 and the differential housing 41 can rotate at the same speed.

[0043] Furthermore, there are two intermediate gears 32, which are loosely fitted onto the intermediate shaft 30 at intervals. Each of the two intermediate gears 32 is provided with a first connecting mechanism. The intermediate shaft assembly 3 also includes a synchronizing device 33, which is fixedly connected to the intermediate shaft 30. The synchronizing device 33 is provided with a second connecting mechanism and is located between the two intermediate gears 32. The second connecting mechanism is connected to any one of the first connecting mechanisms to drive the corresponding intermediate gear 32 to rotate.

[0044] Specifically, in an exemplary embodiment of this application, the first connecting mechanism is the gear structure of the intermediate gear 32 itself, the second connecting mechanism is the sliding gear sleeve structure disposed on the synchronization device 33, and the single motor dual intermediate shaft electric drive bridge system is also provided with a second operating mechanism. The second operating mechanism can move the sliding gear sleeve structure to engage with any one of the intermediate gears 32, thereby driving the intermediate gear 32 to rotate.

[0045] Optionally, there are two differential gears 42. The first end of the differential housing 41 is connected to one of the differential gears 42, and the second end of the differential housing 41 is connected to the other differential gear 42. The two differential gears 42 and the differential housing 41 form a mounting cavity 410. In conjunction with the aforementioned embodiment, when there are two intermediate gears 32 and two differential gears 42, the differential gears 42 and intermediate gears 32 are meshed in a one-to-one correspondence. This allows different intermediate gears 32 to be connected to the synchronization device 33, so that power can be output to the wheels through the corresponding intermediate gears 32 and differential gears 42.

[0046] It should be noted that the structure of the differential assembly 4 in the above embodiments can be adjusted according to actual needs, i.e., the connecting ring 45 can be omitted.

[0047] like Figure 1 As shown, when there are two intermediate gears 32 and two differential gears 42, the single-motor dual-intermediate-shaft electric drive axle system may include a motor rotor 12, an input gear 2, two intermediate shaft assemblies 3, and a differential assembly 4. The intermediate shaft assembly 3 includes an intermediate shaft 30, a driven gear 31, two spaced intermediate gears 32, and a synchronizing device 33 disposed between the two intermediate gears 32. The synchronizing device 33 is fixedly connected to the intermediate shaft 30. Both intermediate gears 32 are loosely fitted onto the intermediate shaft 30, and each intermediate gear 32 is provided with a first connection. The mechanism includes a second connecting mechanism on the synchronizing device 33. The differential assembly 4 includes two differential gears 42 and a differential housing 41 disposed between and fixedly connected to the two differential gears 42. The two differential gears 42 are respectively meshed with two intermediate gears 32. The differential housing 41 contains the aforementioned differential shaft 411, two planetary gears 43, two output gears 44, and a connecting ring 45. The connecting ring 45 is provided with a second locking mechanism, and one of the output gears 44 is provided with a first locking mechanism.

[0048] like Figure 4As shown, when there are two intermediate gears 32 and two differential gears 42, the single-motor dual-intermediate-shaft electric drive axle system may include a motor rotor 12, an input gear 2, two intermediate shaft assemblies 3, and a differential assembly 4. The intermediate shaft assembly 3 includes an intermediate shaft 30, a driven gear 31, two spaced intermediate gears 32, and a synchronizing device 33 disposed between the two intermediate gears 32. The synchronizing device 33 and the intermediate shaft 30... The differential assembly 4 is fixedly connected, with two intermediate gears 32 loosely fitted on the intermediate shaft 30. Each of the two intermediate gears 32 is provided with a first connecting mechanism, and the synchronizing device 33 is provided with a second connecting mechanism. The differential assembly 4 includes two differential gears 42 and a differential housing 41 disposed between and fixedly connected to the two differential gears 42. The two differential gears 42 are respectively meshed with the two intermediate gears 32. The differential housing 41 is provided with the aforementioned differential shaft 411, two planetary gears 43, and two output gears 44.

[0049] like Figure 1 and Figure 4 The single-motor, dual-intermediate-shaft electric drive axle system shown has two intermediate gears 32. These two gears 32 can achieve different power transmission effects, resulting in different wheel speeds, which facilitates vehicle movement during cornering and other situations. Depending on the actual driving environment and other practical application requirements, various options can be selected... Figure 1 The single-motor dual-intermediate-shaft electric drive axle system with differential lock function shown is an example, or you can choose from options such as... Figure 4 The image shows a single-motor, dual-intermediate-shaft electric drive axle system without differential lock functionality.

[0050] Furthermore, the two intermediate gears 32 are set with different radii. This arrangement allows the two intermediate gears 32 to transmit different speeds to the differential gear 42, so that when different intermediate gears 32 are connected to the intermediate shaft 30, the vehicle is in different gears, thus realizing the expansion of the vehicle's gear ratios.

[0051] Optionally, there is only one intermediate gear 32, which is fixedly connected to the intermediate shaft 30. When only one intermediate gear 32 is provided, the structure of the intermediate shaft assembly 3 is simpler, effectively reducing manufacturing costs.

[0052] like Figure 5As shown, the single-motor dual-intermediate-shaft electric drive bridge system includes a motor rotor 12, an input gear 2, two intermediate shaft assemblies 3, and a differential assembly 4. The intermediate shaft assembly 3 includes an intermediate shaft 30, a driven gear 31, and an intermediate gear 32. The intermediate gear 32 is fixedly connected to the intermediate shaft 30. The differential assembly 4 includes a differential housing 41 and a differential gear 42. The differential gear 42 is meshed with the intermediate gear 32. The differential housing 41 contains the aforementioned differential shaft 411, two planetary gears 43, two output gears 44, and a connecting ring 45. The connecting ring 45 is provided with a second locking mechanism, and the output gear 44, which is away from the differential gear 42, is provided with a first locking mechanism.

[0053] like Figure 6 As shown, the single-motor dual-intermediate-shaft electric drive axle system includes a motor rotor 12, an input gear 2, two intermediate shaft assemblies 3, and a differential assembly 4. The intermediate shaft assembly 3 includes an intermediate shaft 30, a driven gear 31, and an intermediate gear 32. The intermediate gear 32 is fixedly connected to the intermediate shaft 30. The differential assembly 4 includes a differential housing 41 and a differential gear 42. The differential gear 42 is meshed with the intermediate gear 32. The differential housing 41 contains the aforementioned differential shaft 411, two planetary gears 43, and two output gears 44.

[0054] Based on actual driving conditions and actual manufacturing cost requirements, you can choose such as Figure 5 The single-motor dual-intermediate-shaft electric drive axle system with differential lock function shown is an example, or you can choose from options such as... Figure 6 The image shows a single-motor, dual-intermediate-shaft electric drive axle system without a differential lock.

[0055] In the above embodiment, the input gear 2 is fixedly connected to the motor rotor 12 and supported on the housing of the electric drive bridge system by the bearing 6. Both ends of the intermediate shaft assembly 3, the first output shaft 51 and the second output shaft 52 are all supported by the bearing 6.

[0056] Optionally, the axes of the two intermediate shafts 30 are in the same plane as the axis of the input gear 2. For example... Figure 2 As shown, the two intermediate shafts 30 are arranged in a straight line with the axis of the input gear 2, which saves the longitudinal layout space of the single motor dual intermediate shaft electric drive bridge system.

[0057] Optionally, the axes of the two intermediate shafts 30 are arranged at an angle to the line connecting them to the axis of the input gear 2. For example... Figure 3As shown, the two intermediate shafts 30 are arranged in a V-shape with the axis of the input gear 2, which saves horizontal space in the single-motor dual-intermediate-shaft electric drive axle system. Depending on the actual vehicle layout requirements, a V-shaped or straight-line arrangement can be selected, wherein the axes of the two intermediate shafts 30 are always symmetrically arranged in the vertical plane with respect to the axis of the input gear 2.

[0058] According to another specific embodiment of this application, a vehicle is provided, the vehicle having an electric drive axle system, the electric drive axle system being the single-motor dual-intermediate-shaft electric drive axle system described above.

[0059] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0060] In addition to the above, it should be noted that the terms "one embodiment," "another embodiment," and "embodiment" used in this specification refer to specific features, structures, or characteristics described in connection with that embodiment, which are included in at least one embodiment described in the general description of this application. The appearance of the same expression in multiple places in the specification does not necessarily refer to the same embodiment. Furthermore, when a specific feature, structure, or characteristic is described in connection with any embodiment, the intention is to suggest that implementing such a feature, structure, or characteristic in conjunction with other embodiments also falls within the scope of this invention.

[0061] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0062] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A single-motor, dual-intermediate-shaft electric drive bridge system, characterized in that, include: The motor has a motor rotor (12) and a motor stator (11), wherein the axis of the motor rotor (12) is on the same axis as the axis of the vehicle axle; An input gear (2) is fixedly connected to the motor rotor (12); Intermediate shaft assembly (3), there are two intermediate shaft assemblies (3), each intermediate shaft assembly (3) includes an intermediate shaft (30), a driven gear (31) and an intermediate gear (32). The driven gear (31) is fixedly connected to the intermediate shaft (30) and meshes with the input gear (2). There is at least one intermediate gear (32) and the intermediate gear (32) is connected to the intermediate shaft (30). The intermediate shaft (30) can drive the intermediate gear (32) to rotate. The two intermediate shafts (30) are arranged in parallel. A differential assembly (4) includes at least a differential gear (42) and a differential housing (41). The differential gear (42) meshes with the intermediate gear (32). There is at least one differential gear (42). The differential housing (41) is connected to the differential gear (42). The differential housing (41) and the differential gear (42) form a mounting cavity (410). A differential is disposed in the mounting cavity (410). The differential has a first output shaft (51) and a second output shaft (52). The first output shaft (51) is used to drive the left wheel of the vehicle, and the second output shaft (52) is used to drive the right wheel of the vehicle. The motor rotor (12), the input gear (2), the first output shaft (51), and the second output shaft (52) are arranged coaxially; There are two intermediate gears (32), which are spaced apart and loosely fitted onto the intermediate shaft (30). Each of the two intermediate gears (32) is provided with a first connecting mechanism. The intermediate shaft assembly (3) further includes: Synchronization device (33), the synchronization device (33) is fixedly connected to the intermediate shaft (30), the synchronization device (33) is provided with a second connecting mechanism, and the synchronization device (33) is located between the two intermediate gears (32); The second connecting mechanism is connected to any one of the first connecting mechanisms to drive the corresponding intermediate gear (32) to rotate; The two intermediate gears (32) are set with different radii; The first connecting mechanism is the gear structure of the intermediate gear (32) itself, and the second connecting mechanism is the sliding tooth sleeve structure set on the synchronization device (33); the second operating mechanism moves the sliding tooth sleeve structure to engage with any one of the intermediate gears (32) by operating the sliding tooth sleeve structure.

2. The single-motor dual-intermediate-shaft electric drive bridge system according to claim 1, characterized in that, The differential includes: A differential shaft (411) extends radially along the differential housing (41) and is disposed within the mounting cavity (410). Both ends of the differential shaft (411) are connected to the inner wall of the differential housing (41). Planetary gears (43), there are two planetary gears (43), the two planetary gears (43) are disposed in the mounting cavity (410), and the two planetary gears (43) are spaced apart on the differential shaft (411); There are two output gears (44), each of which is meshed with two planetary gears (43). One of the output gears (44) is connected to the first output shaft (51), and the other output gear (44) is connected to the second output shaft (52).

3. The single-motor dual-intermediate-shaft electric drive bridge system according to claim 2, characterized in that, A first locking mechanism is provided on either of the two output gears (44), and the differential assembly (4) further includes: A connecting ring (45) is disposed in the mounting cavity (410). The connecting ring (45) is fixedly connected to the inner wall of the differential housing (41). The connecting ring (45) is provided with a second locking mechanism. The first locking mechanism and the second locking mechanism have a locking position that engages with each other and a releasing position that disengages from each other.

4. The single-motor dual-intermediate-shaft electric drive bridge system according to claim 1, characterized in that, There are two differential gears (42). The first end of the differential housing (41) is connected to one of the differential gears (42), and the second end of the differential housing (41) is connected to the other differential gear (42). The two differential gears (42) and the differential housing (41) form the mounting cavity (410).

5. The single-motor dual-intermediate-shaft electric drive bridge system according to claim 1, characterized in that, There is one intermediate gear (32), and the intermediate gear (32) is fixedly connected to the intermediate shaft (30).

6. The single-motor dual-intermediate-shaft electric drive bridge system according to claim 1, characterized in that, The axes of the two intermediate shafts (30) are in the same plane as the axis of the input gear (2).

7. The single-motor dual-intermediate-shaft electric drive bridge system according to claim 1, characterized in that, The axes of the two intermediate shafts (30) are set at an angle to the line connecting the axis of the input gear (2).

8. A vehicle having an electric drive axle system, characterized in that, The electric drive bridge system is a single-motor dual-intermediate-shaft electric drive bridge system as described in any one of claims 1-7.

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