Input shaft assembly of two-gear electric drive system and vehicle with same

Abstract

The application provides an input shaft assembly of a two-gear electric drive system and a vehicle with the same. The input shaft assembly comprises: an input shaft, a gear seat arranged on the input shaft, a one-gear gear set arranged at one end of the gear seat, a two-gear gear set arranged at the other end of the gear seat, and a gear sleeve sleeved on the gear seat and slidably arranged relative to the gear seat along the axial direction of the input shaft; and an electromagnetic gear shifting mechanism, which comprises at least an electromagnetic coil and a transmission part, the transmission part being connected with the gear sleeve, and the transmission part driving the gear sleeve to slide relative to the gear seat after the electromagnetic coil is electrified, so that the gear sleeve is combined with at least one of the one-gear gear set and the two-gear gear set. According to the technical scheme of the application, the electromagnetic coil is used to drive the transmission part to switch gears, the gear shifting time is short, the response is fast, the number of parts is greatly reduced, the traditional shift fork, shift fork shaft, execution motor and other parts are cancelled, and the cost is reduced.

Description

Technical Field

[0001] This invention relates to the field of vehicle electric drive system design technology, and more specifically, to an input shaft assembly of a two-speed electric drive system and a vehicle having the same. Background Technology

[0002] With increasing societal emphasis on environmental protection, electric vehicles, due to their unique energy-saving and environmentally friendly characteristics, are gradually entering the mainstream automotive market and becoming a major direction for future automotive development. Currently, electric vehicles primarily use single-speed fixed-ratio reducers, which cannot effectively balance starting power and high-speed economy. Two-speed reducers, through speed ratio adjustment, allow the electric drive to operate in a more efficient range, particularly contributing significantly to high-speed vehicle performance. They also better balance acceleration and top speed, increasing the vehicle's driving range. Synchronizers or dog-tooth shifters, in particular, can reduce the number of parts and achieve two-speed reducer functionality at a lower cost. However, traditional synchronizer or dog-tooth shifter mechanisms are cumbersome and space-consuming, making them unsuitable for placement within the electric drive reducer.

[0003] Existing two-speed reducers that use synchronizers or dog-tooth shifters mostly employ traditional mechanical shifting mechanisms to achieve gear changes. These mechanisms mainly include an actuator motor, ball screws or other types of gear transmission reduction mechanisms, shift forks, shift fork shafts, bushings, bearings, and other components. These traditional shifting mechanisms occupy a large space, are costly, and are not conducive to overall layout. Furthermore, their complex transmission paths reduce efficiency.

[0004] No effective solution has yet been proposed to address the aforementioned technical issues. Summary of the Invention

[0005] The main objective of this invention is to provide an input shaft assembly for a two-speed electric drive system and a vehicle having the same, so as to solve the technical problems of large space occupation and high cost of the gear shifting mechanism in the prior art.

[0006] To achieve the above objectives, according to one aspect of the present invention, an input shaft assembly for a two-speed electric drive system is provided, comprising: an input shaft, a gear seat disposed on the input shaft, a first-speed gear set disposed at one end of the gear seat, a second-speed gear set disposed at the other end of the gear seat, a gear sleeve sleeved on the gear seat, the gear sleeve being slidably disposed relative to the gear seat along the axial direction of the input shaft; and an electromagnetic shifting mechanism, the electromagnetic shifting mechanism comprising at least an electromagnetic coil and a transmission part, the transmission part being connected to the gear sleeve, wherein when the electromagnetic coil is energized, the transmission part drives the gear sleeve to slide relative to the gear seat, so that the gear sleeve engages with at least one of the first-speed gear set and the second-speed gear set.

[0007] Furthermore, the inner circumferential surface of the gear sleeve is connected to the gear seat, and an annular protrusion is provided on the outer circumferential surface of the gear sleeve. The annular protrusion is connected to the transmission part, and the transmission part drives the gear sleeve to slide along the axial direction of the input shaft, so that at least a portion of the inner circumferential surface of the gear sleeve is connected to at least one of the first gear set and the second gear set.

[0008] Furthermore, the transmission part includes: a sliding sleeve having a first annular body and a second annular body, the first annular body extending radially along the input shaft, the second annular body connected to the first annular body, the second annular body extending axially along the input shaft, the first annular body abutting against a first side of an annular protrusion, and at least a portion of the inner surface of the second annular body covering the outer surface of the annular protrusion; and a push block disposed on the outer surface of the second annular body, with one side of the push block abutting against the first annular body.

[0009] Furthermore, the length of the second annular body along the axial direction of the input shaft is greater than the length of the annular protrusion along the axial direction of the input shaft. An annular groove is provided on the second annular body. The transmission part also includes a retaining ring, at least part of which is disposed in the annular groove, and the other part of which abuts against the second side of the annular protrusion.

[0010] Furthermore, the inner surface of the first annular body is provided with a gap to the outer circumferential surface of the tooth sleeve, and the inner surface of the second annular body is provided with a gap to the outer surface of the annular protrusion.

[0011] Furthermore, the electromagnetic shifting mechanism includes a housing assembly having a first annular space and a second annular space, wherein an electromagnetic coil is disposed in the first annular space and at least part of the transmission part is disposed in the second annular space.

[0012] Further, the housing assembly includes: a housing having an outer housing ring and an inner housing ring extending along the axial direction of the input shaft, a connecting housing being disposed between the outer housing ring and the inner housing ring, the connecting housing extending along the radial direction of the input shaft; a pressure plate having a first pressure plate and a second pressure plate, the second pressure plate extending along the axial direction of the input shaft, the first pressure plate extending along the radial direction of the input shaft, a first end of the first pressure plate being connected to the second pressure plate, the outer housing ring being connected to the second end of the first pressure plate, the outer housing ring, the first pressure plate, the connecting housing, a portion of the second pressure plate, and a portion of the inner housing ring forming a first annular space, the inner housing ring and the second pressure plate forming a second annular space; the inner housing ring and the second pressure plate are disposed with a gap.

[0013] Furthermore, the outer casing and the pressure plate are connected by an interference fit.

[0014] Furthermore, at least one of the second gear set and the first gear set includes: a drive gear, which is loosely fitted on the input shaft; a engagement tooth, which is connected to the drive gear; and a synchronizing ring, which is disposed on the engagement tooth. After the electromagnetic coil is energized, the transmission part drives the gear sleeve to slide relative to the gear seat, so that the gear sleeve is connected to the synchronizing ring.

[0015] According to another aspect of the present invention, a vehicle is provided having an input shaft assembly for a two-speed electric drive system, the input shaft assembly for the two-speed electric drive system being the aforementioned input shaft assembly for the two-speed electric drive system.

[0016] By applying the technical solution of this invention, an electromagnetic coil drive is used in conjunction with the transmission unit to switch gears, resulting in short shift times and fast response. Simultaneously, the number of components is significantly reduced, eliminating traditional parts such as shift forks, shift fork shafts, and actuator motors, thus lowering costs. The number of parts in the traditional gear shifting mechanism is also simplified by integrating the electromagnetic shifting mechanism with the input shaft, eliminating space-consuming structures such as actuator motors, thereby reducing manufacturing difficulty and costs. Furthermore, reducing mechanical transmission components significantly reduces mechanical losses and improves system efficiency. Because many traditional mechanical components are eliminated, the space required for the reducer assembly is reduced, which is beneficial for overall vehicle layout. 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 the structure of a first embodiment of the input shaft assembly of a two-speed electric drive system according to the present invention is shown;

[0019] Figure 2 It shows Figure 1 Enlarged view of point A in the middle;

[0020] Figure 3 A schematic diagram of a second embodiment of the input shaft assembly of the two-speed electric drive system according to the present invention is shown;

[0021] Figure 4 A schematic diagram of the third embodiment of the input shaft assembly of the two-speed electric drive system according to the present invention is shown.

[0022] The above figures include the following reference numerals:

[0023] 1. First gear drive gear; 2. First gear engagement gear; 3. First gear synchronizing ring;

[0024] 4. Gear sleeve; 41. Annular protrusion;

[0025] 5. Sliding sleeve; 51. First annular body; 52. Second annular body; 53. Annular groove;

[0026] 6. Pressure plate; 61. First pressure plate; 62. Second pressure plate;

[0027] 7. Electromagnetic coil; 701. First annular space; 702. Second annular space;

[0028] 8. Outer shell; 81. Outer ring of the shell; 82. Inner ring of the shell; 83. Connecting shell;

[0029] 9. Push block; 10. Snap ring; 11. Gear seat;

[0030] 12. Second gear synchronizer ring; 13. Second gear engagement gear; 14. Second gear drive gear;

[0031] 15. Input shaft; 16. Second-gear side bearing; 17. Second-gear shim; 18. Bushing; 19. Second-gear needle roller; 20. First-gear needle roller; 21. First-gear retaining ring; 22. First-gear shim; 23. First-gear side bearing. Detailed Implementation

[0032] 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.

[0033] 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.

[0034] 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.

[0035] 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.

[0036] Combination Figures 1 to 4 As shown, according to a specific embodiment of this application, an input shaft assembly for a two-speed electric drive system is provided.

[0037] The input shaft assembly includes an input shaft 15 and an electromagnetic shifting mechanism. A gear seat 11 is provided on the input shaft 15. A first gear set is provided at one end of the gear seat 11, and a second gear set is provided at the other end of the gear seat 11. A gear sleeve 4 is fitted on the gear seat 11 and is slidably disposed relative to the gear seat 11 along the axial direction of the input shaft 15. The electromagnetic shifting mechanism includes at least an electromagnetic coil 7 and a transmission part. The transmission part is connected to the gear sleeve 4. After the electromagnetic coil 7 is energized, the transmission part drives the gear sleeve 4 to slide relative to the gear seat 11 so that the gear sleeve 4 engages with at least one of the first gear set and the second gear set.

[0038] The technical solution of this embodiment uses an electromagnetic coil 7 to drive the transmission unit to switch gears, resulting in short shift times and fast response. Simultaneously, the number of parts is significantly reduced, eliminating traditional shift forks, shift fork shafts, and actuator motors, thus lowering costs. The number of parts in the traditional shift control mechanism is also simplified by integrating the electromagnetic shift mechanism with the input shaft, eliminating space-consuming structures such as actuator motors, reducing manufacturing difficulty and cost. Furthermore, reducing mechanical transmission components significantly reduces mechanical losses and improves system efficiency. Because many traditional mechanical components are eliminated, the space required for the reducer assembly is reduced, which is beneficial for overall vehicle layout.

[0039] Furthermore, the inner circumferential surface of the gear sleeve 4 is connected to the gear seat 11, and an annular protrusion 41 is provided on the outer circumferential surface of the gear sleeve 4. The annular protrusion 41 is connected to the transmission part, and the transmission part drives the gear sleeve 4 to slide along the axial direction of the input shaft 15, so that at least a portion of the inner circumferential surface of the gear sleeve 4 is connected to at least one of the first gear set and the second gear set. By providing the annular protrusion 41, after the transmission part is connected to the gear sleeve 4, it can clamp the gear sleeve 4 along the two end faces of the annular protrusion 41, thereby suppressing the axial runout of the gear sleeve 4.

[0040] Specifically, the transmission unit includes a sliding sleeve 5 and a push block 9. The sliding sleeve 5 has a first annular body 51 and a second annular body 52. ​​The first annular body 51 extends radially along the input shaft 15, and the second annular body 52 is connected to the first annular body 51 and extends axially along the input shaft 15. The first annular body 51 abuts against a first side of the annular protrusion 41, and at least a portion of the inner surface of the second annular body 52 covers the outer surface of the annular protrusion 41. The push block 9 is disposed on the outer surface of the second annular body 52, and one side of the push block 9 abuts against the first annular body 51. With this arrangement, the second annular body 52 exerts an axial force on the annular protrusion 41 and a radial force on the annular protrusion 41, so that after subsequent assembly, the sliding sleeve 5 can drive the gear sleeve 4 to move smoothly.

[0041] Preferably, the sliding sleeve 5 and the push block 9 are interference-fitted. The interference fit makes the connection between the sliding sleeve 5 and the push block 9 more secure, avoiding the problem of subsequent operational failure caused by the push block 9 separating from the sliding sleeve 5.

[0042] Furthermore, the length of the second annular body 52 along the axial direction of the input shaft 15 is greater than the length of the annular protrusion 41 along the axial direction of the input shaft 15. An annular groove 53 is formed on the second annular body 52. ​​The transmission part also includes a retaining ring 10, at least a portion of which is disposed within the annular groove 53, and the remaining portion of which abuts against the second side of the annular protrusion 41. By providing the retaining ring 10, the retaining ring 10 and the first annular body 51 together generate a clamping force on the annular protrusion 41, thereby achieving axial fixation of the gear sleeve 4 and preventing the gear sleeve 4 from jumping during system operation.

[0043] Furthermore, the inner surface of the first annular body 51 is spaced apart from the outer circumferential surface of the gear sleeve 4, and the inner surface of the second annular body 52 is spaced apart from the outer surface of the annular protrusion 41. This allows the gear sleeve 4 to rotate smoothly and avoids jamming or other phenomena during system operation.

[0044] Furthermore, the electromagnetic shifting mechanism includes a housing assembly with a first annular space 701 and a second annular space 702. An electromagnetic coil 7 is disposed within the first annular space 701, and at least a portion of the transmission part is disposed within the second annular space 702. By configuring the housing assembly, its size can be adjusted according to the volume and mass of the electromagnetic coil 7, facilitating its storage. Placing the transmission part within the second annular space 702 limits its movement distance. The spatial layout of the housing assembly can be optimized based on the actual structural size of components such as the gear sleeve 4, sliding sleeve 5, pressure plate 6, electromagnetic coil 7, housing 8, push block 9, and retaining ring 10, resulting in a more compact overall structure. The size of components such as the electromagnetic coil 7 can also be adjusted according to different shifting force requirements. Simultaneously, this electromagnetic shifting operating mechanism is compatible with synchronizers and dog-tooth shifting mechanisms.

[0045] Specifically, the housing assembly includes a housing 8 and a pressure plate 6. The housing 8 has an outer housing ring 81 and an inner housing ring 82 extending along the axial direction of the input shaft 15. A connecting housing 83 is provided between the outer housing ring 81 and the inner housing ring 82, and the connecting housing 83 extends along the radial direction of the input shaft 15. The pressure plate 6 has a first pressure plate 61 and a second pressure plate 62. The second pressure plate 62 extends along the axial direction of the input shaft 15, and the first pressure plate 61 extends along the radial direction of the input shaft 15. The first end of the first pressure plate 61 is connected to the second pressure plate 62, and the outer housing ring 81 is connected to the second end of the first pressure plate 61. The outer housing ring 81, the first pressure plate 61, the connecting housing 83, a portion of the second pressure plate 62, and a portion of the inner housing ring 82 form a first annular space 701. The inner housing ring 82 and the second pressure plate 62 form a second annular space 702. The inner housing ring 82 and the second pressure plate 62 are provided with a gap. After the sliding sleeve 5 and the push block 9 are installed in the second annular space 702, they can move along the axial direction of the input shaft 15.

[0046] Preferably, the outer casing 8 and the pressure plate 6 are connected by an interference fit. The interference fit makes the connection between the outer casing 8 and the pressure plate 6 more secure, forming a sealed space and avoiding problems such as corrosion and electromagnetic interference that are easily caused by exposed internal parts.

[0047] In one exemplary embodiment of this application, the outer sides of the pressure plate 6 and the outer shell 8 have axial limiting and anti-rotation structures with respect to the reducer housing, which can fix them on the housing and keep them relatively stationary. Only the push block 9 has a small amount of frictional contact with the pressure plate 6 and the outer shell 8 when they are in gear. This frictional contact area is coated with a wear-resistant coating and lubricated with lubricating oil to minimize frictional loss.

[0048] Furthermore, at least one of the second-gear set and the first-gear set includes a drive gear, a engagement gear, and a synchronizing ring. The drive gear is loosely fitted on the input shaft 15; the engagement gear is connected to the drive gear; the synchronizing ring is disposed on the engagement gear. After the electromagnetic coil 7 is energized, the transmission part drives the gear sleeve 4 to slide relative to the gear seat 11 so that the gear sleeve 4 is connected to the synchronizing ring.

[0049] Specifically, the first gear set includes a first gear drive gear 1, a first gear engagement gear 2, and a first gear synchronizer ring 3; the second gear set includes a second gear synchronizer ring 12, a second gear engagement gear 13, and a second gear drive gear 14. When the electromagnetic coil 7 is energized, the transmission unit drives the gear sleeve 4 to slide relative to the gear seat 11, so that the gear sleeve 4 engages with the first gear synchronizer ring 3 or the second gear synchronizer ring 12, thereby realizing the power transmission of the corresponding gear set. Since the first gear set and the second gear set have different transmission ratios, the gear adjustment of the electric drive system can be achieved.

[0050] In one exemplary embodiment of this application, the input shaft assembly of the two-speed electric drive system further includes a second-speed side bearing 16, a second-speed washer 17, a bushing 18, a second-speed needle roller 19, a first-speed needle roller 20, a first-speed retaining ring 21, a first-speed washer 22, and a first-speed side bearing 23.

[0051] like Figure 1 As shown, the two-speed electric drive system is in second gear at this time. By controlling the magnetic force of the electromagnetic coil 7, the entire assembly of the gear sleeve 4, sliding sleeve 5, and push block 9 is moved along the axial direction to the second gear side, so that the first gear drive gear 1 and the first gear engagement gear 2 are idle, and the second gear engagement gear 13, the second gear drive gear 14, the second gear synchronizing ring 12, and the gear sleeve 4 are engaged, so that the system is continuously in the second gear engaged state. At this time, the gear sleeve 4, sliding sleeve 5, push block 9, etc. remain stationary with the input shaft 15 and rotate with the input shaft 15, which can satisfy the function of second gear speed ratio transmission. The disengagement process is the opposite.

[0052] like Figure 2 As shown, the two-speed electric drive system is in first gear at this time. By controlling the magnetic force of the electromagnetic coil 7, the entire assembly of the gear sleeve 4, sliding sleeve 5, and push block 9 is moved along the axis to the first gear side, so that the second gear engagement gear 13 and the second gear drive gear 14 are idle, and the first gear drive gear 1, the first gear engagement gear 2, the first gear synchronizing ring 3, and the gear sleeve 4 are engaged, so that the system is continuously in the first gear engaged state. At this time, the gear sleeve 4, sliding sleeve 5, push block 9, etc. remain stationary with the input shaft 15 and rotate with the input shaft 15, which can satisfy the function of first gear speed ratio transmission. The disengagement process is the opposite.

[0053] like Figure 3As shown, the two-speed electric drive system is in neutral at this time. By controlling the magnetic force of the electromagnetic coil 7, the gear sleeve 4, sliding sleeve 5, and push block 9 are controlled in the middle neutral state, so that the first gear drive gear 1, first gear engagement gear 2, second gear engagement gear 13, and second gear drive gear 14 are idling, and the system is in neutral. At this time, the gear sleeve 4, sliding sleeve 5, push block 9, etc. remain stationary with the input shaft 15 and do not rotate, which can realize the function of disconnecting the motor from the wheel, thereby reducing the motor drag and increasing the driving range of the electric vehicle.

[0054] The input shaft assembly of the two-speed electric drive system in the above embodiment drives the push block by controlling the energization of the electromagnetic coil 7 installed on the outer ring of the synchronizer or dog tooth sleeve. The push block drives the sliding sleeve, which in turn drives the gear sleeve to move axially, thereby realizing gear shifting. This fully meets the requirements for shifting speed and smoothness. The shifting mechanism features a small number of parts, flexible arrangement, large adjustment space, and integration with the input shaft, effectively reducing the size and weight of the reducer assembly while achieving efficient and stable gear shifting. The electromagnetic shifting control allows for continuous storage of shifting force when the synchronizer or dog tooth is engaged, enabling rapid engagement at the appropriate moment. This achieves fast and smooth shifting while meeting the stability and reliability requirements of the two-speed electric drive system.

[0055] According to another specific embodiment of this application, a vehicle is provided, the vehicle having an input shaft assembly of a two-speed electric drive system, the input shaft assembly of the two-speed electric drive system being the aforementioned input shaft assembly of the two-speed electric drive system.

[0056] Preferably, the vehicle can be an electric vehicle. An electric vehicle with the input shaft assembly of the two-speed electric drive system in the above embodiments has a shorter shift time, a faster response, and a reduced space for the reducer assembly due to the simplification of the number of parts, which is beneficial to the overall vehicle layout.

[0057] 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.

[0058] 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.

[0059] 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.

[0060] 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. An input shaft assembly for a two-speed electric drive system, characterized in that, include: An input shaft (15) is provided with a gear seat (11). One end of the gear seat (11) is provided with a first gear set, and the other end of the gear seat (11) is provided with a second gear set. A gear sleeve (4) is fitted on the gear seat (11). The gear sleeve (4) is slidably provided relative to the gear seat (11) along the axial direction of the input shaft (15). An electromagnetic shifting mechanism, comprising at least an electromagnetic coil (7) and a transmission part, wherein the transmission part is connected to the gear sleeve (4), and after the electromagnetic coil (7) is energized, the transmission part drives the gear sleeve (4) to slide relative to the gear seat (11) so that the gear sleeve (4) engages with at least one of the first gear set and the second gear set; The electromagnetic shifting mechanism includes a housing assembly having a first annular space (701) and a second annular space (702). The electromagnetic coil (7) is disposed in the first annular space (701), and at least a portion of the transmission part is disposed in the second annular space (702). The housing assembly includes: The housing (8) has an outer housing ring (81) and an inner housing ring (82) extending along the axial direction of the input shaft (15), and a connecting housing (83) is provided between the outer housing ring (81) and the inner housing ring (82), and the connecting housing (83) extends along the radial direction of the input shaft (15). The pressure plate (6) has a first pressure plate (61) and a second pressure plate (62). The second pressure plate (62) extends along the axial direction of the input shaft (15), and the first pressure plate (61) extends along the radial direction of the input shaft (15). The first end of the first pressure plate (61) is connected to the second pressure plate (62). The outer ring (81) of the housing is connected to the second end of the first pressure plate (61). The outer ring (81), the first pressure plate (61), the connecting housing (83), a portion of the second pressure plate (62), and a portion of the inner ring (82) of the housing are arranged to form a first annular space (701). The inner ring (82) of the housing and the second pressure plate (62) are arranged to form a second annular space (702). The inner ring (82) of the housing is disposed with a gap between it and the second pressure plate (62).

2. The input shaft assembly of the two-speed electric drive system according to claim 1, characterized in that, The inner circumferential surface of the gear sleeve (4) is connected to the gear seat (11), and an annular protrusion (41) is provided on the outer circumferential surface of the gear sleeve (4). The annular protrusion (41) is connected to the transmission part, and the transmission part drives the gear sleeve (4) to slide along the axial direction of the input shaft (15) so that at least part of the inner circumferential surface of the gear sleeve (4) is connected to at least one of the first gear set and the second gear set.

3. The input shaft assembly of the two-speed electric drive system according to claim 2, characterized in that, The transmission unit includes: The sliding sleeve (5) has a first annular body (51) and a second annular body (52). The first annular body (51) extends radially along the input shaft (15), and the second annular body (52) is connected to the first annular body (51). The second annular body (52) extends axially along the input shaft (15). The first annular body (51) abuts against a first side of the annular protrusion (41), and at least a portion of the inner surface of the second annular body (52) covers the outer surface of the annular protrusion (41). Push block (9) is disposed on the outer surface of the second annular body (52), and one side of the push block (9) abuts against the first annular body (51).

4. The input shaft assembly of the two-speed electric drive system according to claim 3, characterized in that, The second annular body (52) is longer than the length of the annular protrusion (41) along the axial direction of the input shaft (15) by a length greater than the length of the annular protrusion (41) along the axial direction of the input shaft (15). An annular groove (53) is provided on the second annular body (52). The transmission part further includes: A retaining ring (10), at least a portion of which is disposed within the annular groove (53), and the other portion of which abuts against the second side of the annular protrusion (41).

5. The input shaft assembly of the two-speed electric drive system according to claim 3, characterized in that, The inner surface of the first annular body (51) is provided with a gap to the outer peripheral surface of the tooth sleeve (4), and the inner surface of the second annular body (52) is provided with a gap to the outer surface of the annular protrusion (41).

6. The input shaft assembly of the two-speed electric drive system according to claim 1, characterized in that, The outer shell (8) is interference-fitted with the pressure plate (6).

7. The input shaft assembly of the two-speed electric drive system according to claim 1, characterized in that, At least one of the second gear set and the first gear set includes: A drive gear, which is loosely fitted onto the input shaft (15); A connecting tooth, which is connected to the driving gear; Synchronization ring, which is disposed on the engagement tooth. After the electromagnetic coil (7) is energized, the transmission part drives the tooth sleeve (4) to slide relative to the tooth seat (11) so that the tooth sleeve (4) is connected to the synchronization ring.

8. A vehicle having an input shaft assembly for a two-speed electric drive system, the input shaft assembly for the two-speed electric drive system being the same as the input shaft assembly for the two-speed electric drive system according to any one of claims 1-7.

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