Unbalanced shaft type electric driving force assembly

Abstract

The invention relates to the technical field of vehicle transmission devices, and discloses a non-balance shaft type electric driving force assembly which comprises a speed change structure connected with an external gear shifting structure, the speed change structure comprises an input shaft and an output shaft, one end of the input shaft is used for being connected with a driving motor, one end of the output shaft is rotationally connected with the other end of the input shaft, and the other end of the output shaft is provided with a bevel gear; the inter-wheel differential mechanism and the first connecting gear are connected through the bevel gear and rotationally connected to the output shaft in a sleeving mode, the second connecting gear is arranged on one side of the first connecting gear in a spaced mode, and the two sliding meshing sleeves are located between the output shaft and the first connecting gear and between the first connecting gear and the second connecting gear respectively. The sliding meshing sleeve is arranged, the traditional structure that the movable gear, the synchronizer and the fixed gear are sequentially arranged is changed, and the structure that the fixed gear and the movable gear are connected in an embedded mode is formed, so that the better integration effect is achieved, the occupied space of the assembly structure can be further reduced, and the space utilization rate of an automobile chassis is increased.

Description

Technical Field

[0001] This invention relates to the field of vehicle transmission technology, and more particularly to a non-balanced shaft electric drive assembly. Background Technology

[0002] The current development goal for drive motors in new energy vehicles is high power density and high integration, meaning that the drive motor can output more power with the same mass, and the motor, transmission, and axle are integrated into a single structure to improve the utilization rate of vehicle chassis space.

[0003] Existing transmissions achieve speed change by switching between multiple sets of different gears and changing the transmission ratio of the rotating chain. Since shifting gears inevitably involves the meshing of two gears with different speeds, forcing them to mesh will inevitably damage the gears. Therefore, the moving gear must mesh with the fixed gear through a synchronizer. The synchronizer ring of the synchronizer serves as a buffer connecting the moving gear and the fixed gear. This means that the moving gear, synchronizer, and fixed gear are arranged in sequence and are an indispensable part of the existing transmission, making it impossible to integrate them to reduce the overall assembly space. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a non-balanced shaft electric drive assembly.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A non-balanced shaft electric drive assembly, comprising: The transmission structure connects to the external shifting structure and changes its own transmission link through structural deformation to change the transmission chain speed ratio of the drive force assembly. The transmission structure includes: The input shaft, one end of which is used to connect to the drive motor, is the starting component of the transmission chain in the speed change structure; The output shaft is coaxially arranged with the input shaft. One end of the output shaft is rotatably connected to the other end of the input shaft, and the other end is provided with a bevel gear, which is connected to the inter-wheel differential through the bevel gear. The first connecting gear is rotatably sleeved on the output shaft; The second connecting gear is rotatably sleeved on the output shaft and is spaced apart on one side of the first connecting gear; Two sliding engagement sleeves are engaged on the output shaft via internal straight splines, and the two sliding engagement sleeves are respectively located between the output shaft and the first connecting gear and between the first connecting gear and the second connecting gear. The two sliding engagement sleeves slide axially on the output shaft through an external shifting structure.

[0006] As a further embodiment of the present invention, the input shaft is provided with an input external gear and an input internal gear, the first connecting gear is provided with a first external gear and a first internal gear, and the second connecting gear is provided with a second external gear and a second internal gear.

[0007] As a further aspect of the present invention, the transmission structure also includes: Two intermediate shafts are symmetrically arranged on both sides of the output shaft. A first shaft gear, a second shaft gear, and a third shaft gear are fixedly mounted on the intermediate shafts in sequence. The first shaft gear is meshed with the input external gear, the second shaft gear is meshed with the first external gear, and the third shaft gear is meshed with the second external gear.

[0008] As a further aspect of the present invention, the sliding engagement sleeve includes: The sliding sleeve is H-shaped with a hollow interior, and its middle part corresponds to the outer shifting structure. The receiving ring is embedded in the middle of the sliding sleeve, and its outer side protrudes from the sliding sleeve for receiving electricity. The electromagnetic structure is located in the middle of the sliding sleeve, with its outer side corresponding to the receiving ring. The two ends of the electromagnetic structure are sleeve-shaped. Compression spring assembly, the compression spring assembly is set inside the sleeve of the electromagnetic structure; Synchronization structure, located on one side of the compression spring assembly.

[0009] As a further aspect of the present invention, the synchronization structure includes: The inner sleeve of the slanted spline is located on one side of the compression spring assembly. Its surface is provided with a slanted spline groove. When the electromagnetic structure is activated, the inner sleeve of the slanted spline slides towards the middle of the sliding sleeve. When the electromagnetic structure is not activated, it is pressed by the compression spring assembly and slides towards the end of the sliding sleeve. The outer sleeve of the slanted spline is located on one side of the inner sleeve of the slanted spline, and its inner side is sleeved with the inner sleeve of the slanted spline. The inner sleeve of the slanted spline slides to drive the outer sleeve of the slanted spline to rotate. A ring slanted block group is provided on the outer side of the outer sleeve of the slanted spline. The sliding gear assembly is located on the outside of the slanted spline outer sleeve assembly and is slidably connected to the ring slanted block assembly. One end of the sliding gear assembly is slidably inserted into the outer wall of the sliding sleeve and extends to the outside. The rotation of the slanted spline outer sleeve assembly drives the sliding gear assembly to extend and retract along the sliding sleeve through the ring slanted block assembly.

[0010] As a further embodiment of the present invention, the diameters of the input shaft, the first connecting gear, and the second connecting gear are all different, and the number of teeth of the input external gear, the first external gear, and the second external gear are all different.

[0011] As a further embodiment of the present invention, the diameters and number of teeth of the first shaft gear, the second shaft gear, and the third shaft gear are all different.

[0012] As a further embodiment of the present invention, the end length of the sliding sleeve is slightly greater than the length of the corresponding input internal gear, the first internal gear, and the second internal gear.

[0013] As a further aspect of the present invention, when the end of the sliding sleeve slides into the interior of the input internal gear, the first internal gear, and the second internal gear, the end face of the sliding sleeve abuts and fits against the inner wall surfaces of the input internal gear, the first internal gear, and the second internal gear.

[0014] As a further embodiment of the present invention, the axial cross-section of the sliding gear tooth set is T-shaped, and the number of teeth of the sliding gear tooth set corresponds to the number of teeth of the corresponding input internal gear, the first internal gear, and the second internal gear.

[0015] Compared with the prior art, the beneficial effects of the present invention are: This invention features a sliding engagement sleeve (equivalent to a movable fixed gear, with the output shaft as the reference), which engages with the input shaft, the first connecting gear, and the second connecting gear (equivalent to a movable gear, with the output shaft as the reference). During engagement, the sliding engagement sleeve inserts into the input shaft, the first connecting gear, and the second connecting gear, gradually synchronizing their rotational speeds. Subsequently, through the deformation of the sliding engagement sleeve itself, the teeth between them can be smoothly connected. The sliding engagement sleeve connects to the input shaft, the first connecting gear, and the second connecting gear from the inside, without the need for a synchronizer. This changes the traditional structure where the movable gear, synchronizer, and fixed gear are arranged sequentially from the side, instead forming a structure where the fixed gear and the movable gear are interlocked. Therefore, it has a better integration effect, further reducing the space occupied by the assembly structure and improving the space utilization of the car chassis. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of a non-balanced shaft electric drive force assembly proposed in this invention; Figure 2 This is a schematic cross-sectional view of the input shaft of an unbalanced shaft electric drive force assembly proposed in this invention. Figure 3 This is a schematic diagram of the input shaft of a non-balanced shaft electric drive force assembly proposed in this invention; Figure 4 This is a schematic diagram of the output shaft of an unbalanced shaft electric drive force assembly proposed in this invention; Figure 5 This is a schematic diagram of the sliding engagement sleeve of a non-balanced shaft electric drive force assembly proposed in this invention; Figure 6 This is a schematic diagram of the synchronization structure of a non-balanced shaft electric drive force assembly proposed in this invention; Figure 7This is a schematic diagram of the compression spring assembly of a non-balanced shaft electric drive force assembly proposed in this invention. Figure 8 This is a schematic diagram of a sliding gear tooth assembly of a non-balanced shaft electric drive force assembly proposed in this invention; Figure 9 This is a schematic diagram of the transmission chain and output direction of a non-balanced shaft electric drive force assembly proposed in this invention. Figure 10 This is a schematic diagram of the two output directions of the transmission chain of a non-balanced shaft electric drive force assembly proposed in this invention; Figure 11 This is a schematic diagram of the three output directions of the transmission chain of a non-balanced shaft electric drive force assembly proposed in this invention; Figure 12 This is a schematic diagram of the four output directions of the transmission chain of a non-balanced shaft electric drive force assembly proposed in this invention.

[0017] In the diagram: 1. Transmission structure; 2. Input shaft; 201. Input external gear; 202. Input internal gear; 3. Output shaft; 301. Bevel gear; 4. First connecting gear; 401. First external gear; 402. First internal gear; 5. Second connecting gear; 501. Second external gear; 502. Second internal gear; 6. Sliding meshing sleeve; 601. Internal straight spline; 602. Sliding sleeve; 603. Electromagnetic ring; 604. Electromagnetic structure; 605. Compression spring assembly; 606. Synchronization structure; 607. Inner sleeve assembly of slanted spline; 608. Slanted spline groove; 609. Outer sleeve assembly of slanted spline; 610. Ring slanted block assembly; 611. Sliding gear tooth assembly; 7. Intermediate shaft; 701. First shaft gear; 702. Second shaft gear; 703. Third shaft gear. Detailed Implementation

[0018] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0019] like Figure 1 and Figure 2As shown, a non-balanced shaft electric drive power assembly includes: a transmission structure 1, which is connected to an external shifting structure. The transmission structure 1 changes its own transmission chain through structural deformation to change the transmission chain speed ratio of the drive power assembly. The transmission structure 1 includes: an input shaft 2, one end of which is connected to a drive motor and serves as the starting component of the transmission chain on the transmission structure 1 (based on the output shaft 3, equivalent to a movable gear). The output shaft 3 is coaxially arranged with the input shaft 2, one end of which is rotatably connected to the other end of the input shaft 2, and the other end of which is provided with a bevel gear 301. The bevel gear 301 connects to an inter-wheel differential. The motor, input shaft 2, output shaft 3, and inter-wheel differential are coaxial, i.e., the input and output are coaxial. The dynamic layout is more reasonable. The first connecting gear 4 is rotatably sleeved on the output shaft 3 (with the output shaft 3 as the judgment reference, it is equivalent to a movable gear). The second connecting gear 5 is rotatably sleeved on the output shaft 3 and is spaced apart on one side of the first connecting gear 4 (with the output shaft 3 as the judgment reference, it is equivalent to a movable gear). The two sliding meshing sleeves 6 are meshed on the output shaft 3 through the internal straight spline 601. The two sliding meshing sleeves 6 are located between the output shaft 3 and the first connecting gear 4 and between the first connecting gear 4 and the second connecting gear 5, respectively. The two sliding meshing sleeves 6 slide axially on the output shaft 3 through the external shifting structure (with the output shaft 3 as the judgment reference, it is equivalent to a fixed gear that can slide).

[0020] like Figure 2 and Figure 3 As shown, the input shaft 2 is provided with an input external gear 201 and an input internal gear 202, the first connecting gear 4 is provided with a first external gear 401 and a first internal gear 402, and the second connecting gear 5 is provided with a second external gear 501 and a second internal gear 502.

[0021] like Figure 1 As shown, the transmission structure 1 also includes two intermediate shafts 7, which are symmetrically arranged on both sides of the output shaft 3. A first shaft gear 701, a second shaft gear 702, and a third shaft gear 703 are fixedly mounted on the intermediate shafts 7 in sequence. The first shaft gear 701 is meshed with the input external gear 201, the second shaft gear 702 is meshed with the first external gear 401, and the third shaft gear 703 is meshed with the second external gear 501. The double intermediate shaft 7 structure provides stronger torque transmission and a more compact structure.

[0022] like Figures 5 to 7As shown, the sliding engagement sleeve 6 includes: a sliding sleeve shell 602, which is H-shaped with a hollow interior. The middle part of the sliding sleeve shell 602 corresponds to the outer shifting structure. The outer shifting structure is sleeved in the middle of the sliding sleeve shell 602. Operating the outer shifting structure can drive the sliding sleeve shell 602 to move axially along the output shaft 3. A receiving ring 603 is embedded in the middle of the sliding sleeve shell 602, and its outer side protrudes from the sliding sleeve shell 602 for receiving electricity. An electromagnetic structure 604 is disposed in the middle of the sliding sleeve shell 602, and its outer side corresponds to the receiving ring 603. The electromagnetic structure 604 is powered through the receiving ring 603. The two ends of the electromagnetic structure 604 are sleeve-shaped. A compression spring assembly 605 is disposed in the sleeve of the electromagnetic structure 604. A synchronization structure 606 is located on one side of the compression spring assembly 605.

[0023] like Figure 7 and Figure 8 As shown, the synchronization structure 606 includes: an inner sleeve 607 with a slanted spline, which is disposed on one side of the compression spring assembly 605. The inner sleeve 607 has a slanted spline groove 608 on its surface. When the electromagnetic structure 604 is activated, the inner sleeve 607 slides towards the middle of the sliding sleeve 602. When the electromagnetic structure 604 is not activated, it is pressed by the compression spring assembly 605 and slides towards the end of the sliding sleeve 602. An outer sleeve 609 with a slanted spline is disposed on one side of the inner sleeve 607, and its inner side is flush with the slanted spline groove 608. The inner spline sleeve 607 is fitted into the outer spline sleeve 609, and the sliding of the inner spline sleeve 607 drives the outer spline sleeve 609 to rotate. An annular helical block 610 is provided on the outer side of the outer spline sleeve 609. A sliding gear tooth assembly 611 is provided on the outer side of the outer spline sleeve 609 and is slidably connected to the annular helical block 610. One end of the sliding gear tooth assembly 611 is slidably inserted into the outer wall of the sliding sleeve 602 and extends to the outside. The rotation of the outer spline sleeve 609 drives the sliding gear tooth assembly 611 to extend and retract along the sliding sleeve 602 through the annular helical block 610.

[0024] like Figure 1 As shown, the diameters of the input shaft 2, the first connecting gear 4, and the second connecting gear 5 are all different. The number of teeth of the input external gear 201, the first external gear 401, and the second external gear 501 are all different. The diameters and number of teeth of the first shaft gear 701, the second shaft gear 702, and the third shaft gear 703 are all different. The input shaft 2 meshes with the first shaft gear 701. The first connecting gear 4 meshes with the second shaft gear 702 through the first external gear 401. The second connecting gear 5 meshes with the third shaft gear 703 through the second external gear 501.

[0025] like Figure 2 As shown, the end length of the sliding sleeve 602 is slightly greater than the length of the corresponding input internal gear 202, the first internal gear 402 and the second internal gear 502, to avoid unnecessary wear caused by the external shifting structure driving the sliding engagement sleeve 6 to move and abutting against the adjacent gear.

[0026] like Figure 2 As shown, when the end of the sliding sleeve 602 slides into the interior of the input internal gear 202, the first internal gear 402, and the second internal gear 502, the end face of the sliding sleeve 602 abuts against and fits against the inner wall surfaces of the input internal gear 202, the first internal gear 402, and the second internal gear 502. After the abutment and fit, as the friction gradually increases, the rotational speed of the sliding sleeve 602 gradually becomes the same as the rotational speed of the input internal gear 202, the first internal gear 402, and the second internal gear 502.

[0027] like Figure 2 and Figure 7 As shown, the axial section of the sliding gear set 611 is T-shaped. The number of teeth of the sliding gear set 611 corresponds to the number of teeth of the corresponding input internal gear 202, the first internal gear 402 and the second internal gear 502, so that the sliding gear set can mesh with the input internal gear 202, the first internal gear 402 and the second internal gear 502.

[0028] Described in terms of transmission chains, this application has four transmission chains: like Figure 9 As shown, in transmission chain one: the drive motor drives the input shaft 2 to rotate, and the sliding engagement sleeve 6 does not engage with the input shaft 2, the first connecting gear 4, and the second connecting gear 5. At this time, the input shaft 2 cannot drive the output shaft 3 to rotate, and the drive motor idles. like Figure 10 As shown, in the second transmission chain: the drive motor drives the input shaft 2 to rotate, the sliding engagement sleeve 6 engages with the input shaft 2, and does not engage with the first connecting gear 4 and the second connecting gear 5. At this time, the input shaft 2 drives the output shaft 3 to rotate through the sliding engagement sleeve 6, and then drives the inter-wheel differential to rotate through the bevel gear 301. like Figure 11 As shown, in the third transmission chain: the drive motor drives the input shaft 2 to rotate, the sliding engagement sleeve 6 engages with the first connecting gear 4, and does not engage with the input shaft 2 and the second connecting gear 5. At this time, the input shaft 2 drives the first connecting gear 4 to rotate through the second shaft gear 702 of the intermediate shaft 7, and then drives the output shaft 3 to rotate through the sliding engagement sleeve 6. The bevel gear 301 rotates and drives the inter-wheel differential to rotate. like Figure 12 As shown, in the fourth transmission chain: the drive motor drives the input shaft 2 to rotate, the sliding engagement sleeve 6 engages with the second connecting gear 5, and does not engage with the input shaft 2 and the first connecting gear 4. At this time, the input shaft 2 drives the second connecting gear 5 to rotate through the third shaft gear 703 of the intermediate shaft 7, and then drives the output shaft 3 to rotate through the sliding engagement sleeve 6. The bevel gear 301 rotates and drives the inter-wheel differential to rotate. The synchronous connection process between the sliding engagement sleeve 6 and the input shaft 2, the first connecting gear 4, and the second connecting gear 5 is as follows: When a gear shift is required, the electromagnetic structure 604 is activated, generating an attractive force that draws the inner spline sleeve 607 towards the center of the sliding sleeve 602, compressing the spring assembly 605. Simultaneously, the inner spline sleeve 607, through the spline groove 608, drives the outer spline sleeve 609 to rotate, causing the outer spline sleeve 609, through the ring helical block assembly 610, to retract the sliding gear tooth assembly 611 into the sliding sleeve 602. Subsequently, the external gear shifting structure drives the sliding engagement sleeve 6 to slide, causing the end face of the sliding engagement sleeve 6 to abut against the inner wall of the adjacent gear. As the friction increases, the rotational speeds of the two gears gradually synchronize. After the same state is reached, the electromagnetic structure 604 stops, and the compression spring assembly 605 resets, causing the inner sleeve assembly 607 of the slanted spline to slide towards the end of the sliding sleeve 602. This, in turn, drives the outer sleeve assembly 609 of the slanted spline through the slanted spline groove 608 to rotate in the opposite direction. This causes the outer sleeve assembly 609 of the slanted spline to drive the sliding gear tooth assembly 611 to extend outward from the sliding sleeve 602 through the ring slant block assembly 610. If the gear teeth do not mesh at this time, the sliding gear tooth assembly 611 cannot extend out of the sliding sleeve 602, and will drive the sliding sleeve 602 to rotate in the opposite direction until the gear teeth mesh and the sliding gear tooth assembly 611 extends out of the sliding sleeve 602 to mesh with the corresponding gear.

[0029] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A non-balanced axle electric drive powertrain, characterized by, The application relates to a variable-speed structure (1) connected with an external gear-shifting structure, which changes the transmission chain route of the variable-speed structure (1) through structural deformation to change the transmission chain speed ratio of a driving force assembly. The variable-speed structure (1) at least comprises two sliding engagement sleeves (6). The sliding engagement sleeve (6) comprises a sliding sleeve shell (602), a power receiving ring (603), an electromagnetic structure (604), an extrusion spring group (605) and a synchronous structure (606). The synchronous structure (606) comprises: a slanting key inner sleeve group (607) arranged on one side of the extrusion spring group (605), the surface of the slanting key inner sleeve group (607) is provided with a slanting key groove (608), the slanting key inner sleeve group (607) slides to the middle part of the sliding sleeve shell (602) when the electromagnetic structure (604) is started, and the slanting key inner sleeve group (607) is extruded by the extrusion spring group (605) to slide to the end part of the sliding sleeve shell (602) when the electromagnetic structure (604) is not started; a slanting key outer sleeve group (609) arranged on one side of the slanting key inner sleeve group (607), the inner side of the slanting key outer sleeve group (609) is sleeved with the slanting key inner sleeve group (607), the slanting key inner sleeve group (607) drives the slanting key outer sleeve group (609) to rotate when the slanting key inner sleeve group (607) slides, and the outer side of the slanting key outer sleeve group (609) is provided with a ring slanting block group (610); a sliding gear group (611) arranged on the outer side of the slanting key outer sleeve group (609) and slidably connected with the ring slanting block group (610), one end of the sliding gear group (611) is slidably inserted into the outer wall of the sliding sleeve shell (602) and extends to the outside, and the slanting key outer sleeve group (609) drives the sliding gear group (611) to stretch and contract along the sliding sleeve shell (602) through the ring slanting block group (610) when the slanting key outer sleeve group (609) rotates. The variable-speed structure (1) further comprises an input shaft (2), an output shaft (3), a first connecting gear (4) and a second connecting gear (5).

2. A non-balanced axle electric drive power assembly according to claim 1, characterized in that, One end of the input shaft (2) is used for connecting a driving motor and is the starting component of the transmission chain of the variable-speed structure (1); The output shaft (3) is coaxially arranged with the input shaft (2), one end of the output shaft (3) is rotationally connected with the other end of the input shaft (2), and the other end of the output shaft (3) is provided with a bevel gear (301) which is connected with an inter-wheel differential; The first connecting gear (4) is rotationally sleeved on the output shaft (3); The second connecting gear (5) is rotationally sleeved on the output shaft (3) and is arranged on one side of the first connecting gear (4) in a spaced mode; The two sliding engagement sleeves (6) are sleeved on the output shaft (3) through inner straight keys (601) and are arranged between the output shaft (3) and the first connecting gear (4) and between the first connecting gear (4) and the second connecting gear (5) respectively, and the two sliding engagement sleeves (6) are axially slid on the output shaft (3) through the external gear-shifting structure. ​ 3. A non-balanced axle electric drive power assembly according to claim 2, wherein, The input shaft (2) is provided with an input external gear (201) and an input internal gear (202), the first connecting gear (4) is provided with a first external gear (401) and a first internal gear (402), and the second connecting gear (5) is provided with a second external gear (501) and a second internal gear (502).

4. A non-balanced axle electric drive power assembly of claim 1, wherein, The transmission structure (1) further comprises: Two intermediate shafts (7) are symmetrically arranged on both sides of the output shaft (3), and the intermediate shaft (7) is sequentially provided with a first shaft gear (701), a second shaft gear (702) and a third shaft gear (703) along the shaft, the first shaft gear (701) is in meshing connection with the input external gear (201), the second shaft gear (702) is in meshing connection with the first external gear (401), and the third shaft gear (703) is in meshing connection with the second external gear (501).

5. The non-balance shaft type electric drive power assembly according to claim 1, wherein The sliding sleeve shell (602) is in the shape of an H-shaped hollow, and the middle part corresponds to the external gear shifting structure; The power receiving ring (603) is embedded in the middle part of the sliding sleeve shell (602), and the outer side of the power receiving ring (603) protrudes from the sliding sleeve shell (602) for power reception; The electromagnetic structure (604) is arranged in the middle part of the sliding sleeve shell (602), and the outer side of the electromagnetic structure (604) corresponds to the power receiving ring (603), and the two ends of the electromagnetic structure (604) are sleeve-shaped; The extrusion spring group (605) is arranged in the sleeve of the electromagnetic structure (604); The synchronization structure (606) is arranged on one side of the extrusion spring group (605).

6. A non- balanced axle electric drive power assembly of claim 3, wherein, The diameters of the input shaft (2), the first connecting gear (4) and the second connecting gear (5) are different, and the tooth numbers of the input external gear (201), the first external gear (401) and the second external gear (501) are different.

7. A non- balanced axle electric drive power assembly of claim 4, wherein, The diameters and tooth numbers of the first shaft gear (701), the second shaft gear (702) and the third shaft gear (703) are different.

8. A non- balanced axle electric drive power assembly of claim 3, wherein, The length of the end part of the sliding sleeve shell (602) is slightly larger than the length of the corresponding input internal gear (202), the first internal gear (402) and the second internal gear (502).

9. A non- balanced axle electric drive power assembly of claim 3, wherein, When the end part of the sliding sleeve shell (602) slides into the inside of the input internal gear (202), the first internal gear (402) and the second internal gear (502), the end face of the sliding sleeve shell (602) is in contact with the inner wall face of the input internal gear (202), the first internal gear (402) and the second internal gear (502).

10. A non- balanced axle electric drive power assembly of claim 3, wherein, The axial section of the sliding gear set (611) is in the shape of a T, and the tooth number of the sliding gear set (611) corresponds to the tooth number of the corresponding input internal gear (202), the first internal gear (402) and the second internal gear (502).

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