Driving system and vehicle

Abstract

The utility model discloses a driving system and a vehicle, the driving system comprises a power unit and a gearbox, the power unit comprises a first motor and a second motor, a first transmission shaft is in transmission connection with a motor shaft of the first motor, and a second transmission shaft is in transmission connection with a motor shaft of the second motor; the first switching device is used for controlling transmission connection or disconnection of the second transmission shaft, the first transmission shaft and the output shaft, the second switching device is at least used for controlling transmission connection or disconnection of the first transmission shaft and the output shaft, and the intermediate shaft is in transmission connection with the first transmission shaft. The intermediate shaft is suitable for being in transmission connection with the output shaft through the multiple gear shifting gear pairs, and the third switching device is used for controlling connection or separation of the output shaft and / or the intermediate shaft and the multiple gear shifting gear pairs. According to the driving system, pause and sliding risks caused by power interruption in the gear shifting process can be avoided, and the running stability and safety of the vehicle can be improved.

Description

Technical Field

[0001] This utility model relates to the field of vehicle drive device technology, and in particular to a drive system and a vehicle. Background Technology

[0002] With the continuous development of the new energy vehicle industry, drive systems with multi-motor coupled output power are gradually being widely used in different vehicle models. However, in the multi-motor coupled input transmission solutions in related technologies, there is a power interruption problem during gear shifting. For example, during uphill climbing, power interruption will cause difficulty in shifting gears, obvious jerking, and the risk of rolling back, directly affecting the comfort and safety of vehicle driving. Utility Model Content

[0003] The first aspect of this utility model proposes a drive system that has the advantage of ensuring uninterrupted power during gear shifting.

[0004] A drive system according to a first aspect of the present invention includes: a power unit including a first motor and a second motor; a gearbox including a first drive shaft, a second drive shaft, an intermediate shaft, an output shaft, a first switching device, a second switching device, and a third switching device. The first drive shaft is drivenly connected to the motor shaft of the first motor, and the second drive shaft is drivenly connected to the motor shaft of the second motor. The first switching device is used to control the drive connection or disconnection between the second drive shaft and the first drive shaft and the output shaft. The second switching device is at least used to control the drive connection or disconnection between the first drive shaft and the output shaft. The intermediate shaft is drivenly connected to the first drive shaft and is adapted to be drivenly connected to the output shaft through a plurality of shift gear pairs. The third switching device is used to control the connection or disconnection between the output shaft and / or the intermediate shaft and the plurality of shift gear pairs.

[0005] According to the drive system of the first aspect of the present invention, the first switching device controls the transmission connection or disconnection between the second drive shaft and the first drive shaft and the output shaft. This ensures that the first motor and the second motor are coupled and output power, while ensuring that the second motor can drive the output shaft to keep rotating during gear shifting to avoid power interruption. This avoids the risk of jerking and slippage caused by power interruption during gear shifting, and improves the stability and safety of vehicle driving.

[0006] According to some embodiments of the present invention, the intermediate shaft is provided with a plurality of components arranged at circumferential intervals along the output shaft.

[0007] According to some embodiments of the present invention, the second drive shaft is adapted to be driven to the first drive shaft via a first gear pair and adapted to be driven to the output shaft via a second gear pair. The first switching device is used to control the drive connection or disconnection between the first gear pair and the second drive shaft and / or the first drive shaft, and is also used to control the drive connection or disconnection between the second gear pair and the second drive shaft and / or the output shaft.

[0008] According to some embodiments of the present invention, the first gear pair includes a first driving gear loosely fitted on the second transmission shaft and a first driven gear fixed on the first transmission shaft. The second gear pair includes a second driving gear loosely fitted on the second transmission shaft and a second driven gear fixed on the output shaft. The first switching device includes a first sliding sleeve, a first gear hub, a first gear ring, and a second gear ring. The first gear hub is fixed on the second transmission shaft. The first gear ring and the second gear ring are loosely fitted on the second transmission shaft and are respectively connected to the first driven gear and the second driven gear. The first sliding sleeve is slidable along the axial direction of the second transmission shaft to control the connection or separation of the first gear hub from the first gear ring or the second gear ring.

[0009] According to some embodiments of the present invention, a third driving gear is provided on the motor shaft of the first motor, and the third driving gear meshes with the first driven gear.

[0010] According to some embodiments of the present invention, the first gear pair includes a first driving gear fixed to the second transmission shaft and a first driven gear loosely fitted on the first transmission shaft; the second gear pair includes a second driving gear fixed to the second transmission shaft and a second driven gear loosely fitted on the output shaft; the first switching device includes a second sliding sleeve, a third sliding sleeve, a second toothed hub, a third toothed hub, a third toothed ring, and a fourth toothed ring; the second toothed hub is fixed to the first transmission shaft; the third toothed ring is loosely fitted on the first transmission shaft and connected to the first driven gear; the second sliding sleeve is slidable along the axial direction of the first transmission shaft to control the connection or separation of the second toothed hub and the third toothed ring; the third toothed hub is fixed to the output shaft; the fourth toothed ring is loosely fitted on the output shaft and connected to the second driven gear; the third sliding sleeve is slidable along the axial direction of the output shaft to control the connection or separation of the third toothed hub and the fourth toothed ring.

[0011] According to some embodiments of the present invention, a fourth driving gear is provided on the motor shaft of the second motor, and the fourth driving gear meshes with the first driving gear.

[0012] According to some embodiments of the present invention, the first transmission shaft is located on the axial side of the output shaft, and the second gear pair is located on the axial side of the intermediate shaft away from the first transmission shaft.

[0013] According to some embodiments of the present invention, the shift gear pair includes an intermediate shaft gear fixed to the intermediate shaft and an output shaft gear loosely fitted on the output shaft; wherein; the second switching device includes a fourth sliding sleeve, a fourth toothed hub, a fifth toothed ring, and a sixth toothed ring, the fourth toothed hub being fixed to the output shaft, the fifth toothed ring loosely fitted on the output shaft and fixed to the first transmission shaft, the sixth toothed ring loosely fitted on the output shaft and connected to one of the output shaft gears, the fourth sliding sleeve being slidable along the axial direction of the output shaft to control the connection or separation of the fourth toothed hub with the fifth toothed ring or the sixth toothed ring; and / or, the third switching device includes a fifth sliding sleeve, a fifth toothed hub, a seventh toothed ring, and an eighth toothed ring, the fifth toothed hub being fixed to the output shaft, the fifth toothed ring and the sixth toothed ring loosely fitted on the output shaft, the seventh toothed ring and the eighth toothed ring respectively correspondingly connected to one of the output shaft gears, the fifth sliding sleeve being slidable along the axial direction of the output shaft to control the connection or separation of the fifth toothed hub with the seventh toothed ring or the eighth toothed ring.

[0014] The second aspect of this utility model proposes a vehicle.

[0015] The vehicle according to a second aspect of the present invention includes: the drive system described above.

[0016] According to the second aspect of the present invention, the vehicle controls the transmission connection or disconnection between the second drive shaft and the first drive shaft and the output shaft through the first switching device. This ensures that the power coupling output of the first motor and the second motor is maintained, while ensuring that the second motor can drive the output shaft to keep rotating during gear shifting to avoid power interruption. This avoids the risk of jerking and slippage caused by power interruption during gear shifting, and improves the stability and safety of vehicle driving.

[0017] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the drive system according to Embodiment 1 of the present invention;

[0019] Figure 2 This is a schematic diagram of the drive system according to Embodiment 2 of the present invention;

[0020] Figure 3This is a schematic diagram of the drive system according to Embodiment 3 of this utility model;

[0021] Figure 4 This is a schematic diagram of the drive system according to Embodiment 4 of the present invention;

[0022] Figure 5 This is a schematic diagram of the drive system according to Embodiment 5 of the present invention;

[0023] Figure 6 This is a schematic diagram of the drive system according to Embodiment Six of this utility model;

[0024] Figure 7 This is a schematic diagram of the drive system according to Embodiment Seven of the present invention;

[0025] Figure 8 This is a schematic diagram of the drive system according to Embodiment 8 of the present invention;

[0026] Figure 9 This is a schematic diagram of the drive system according to Embodiment Nine of this utility model;

[0027] Figure 10 This is a schematic diagram of the drive system according to Embodiment 10 of the present invention;

[0028] Figure 11 This is a schematic diagram of the drive system according to Embodiment Eleven of the present invention;

[0029] Figure 12 This is a schematic diagram of the drive system according to Embodiment Twelve of the present invention.

[0030] Figure label:

[0031] 100. Drive system;

[0032] 10. Power unit; 11. First motor; 12. Second motor;

[0033] 20. Gearbox; 21. First drive shaft; 22. Second drive shaft; 23. Intermediate shaft; 24. Output shaft; 25. First clutch; 26. Second clutch; 27. Third clutch; 28. Fourth clutch; 29. ​​Fifth clutch; 3. Shift gear pair; 31. Intermediate shaft gear; 32. Output shaft gear; 41. First driving gear; 42. First driven gear; 51. Second driving gear; 52. Second driven gear; 61. Third driving gear; 62. Third driven gear; 71. Fourth driving gear; 72. Fourth driven gear; 81. Fifth driving gear; 82. Fifth driven gear; 9. Output gear. Detailed Implementation

[0034] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0035] The following disclosure provides numerous different embodiments or examples for implementing various structures of the present invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this invention; however, those skilled in the art will recognize the applicability of other processes and / or the use of other materials.

[0036] The drive system 100 according to a first aspect embodiment of the present invention is described below with reference to the accompanying drawings.

[0037] like Figures 1-4 As shown, the drive system 100 according to the first aspect embodiment of the present invention includes: a power unit 10 and a gearbox 20. The power unit 10 includes a first motor 11 and a second motor 12. The gearbox 20 includes a first drive shaft 21, a second drive shaft 22, an intermediate shaft 23, an output shaft 24, a first switching device, a second switching device, and a third switching device. The first drive shaft 21 is drivenly connected to the motor shaft of the first motor 11, and the second drive shaft 22 is drivenly connected to the motor shaft of the second motor 12. The first switching device is used to control the drive connection or disconnection between the second drive shaft 22 and the first drive shaft 21 and the output shaft 24. The second switching device is at least used to control the drive connection or disconnection between the first drive shaft 21 and the output shaft 24. The intermediate shaft 23 is drivenly connected to the first drive shaft 21, and the intermediate shaft 23 is adapted to be drivenly connected to the output shaft 24 through a plurality of shift gear pairs 3. The third switching device is used to control the connection or separation of the output shaft 24 and / or the intermediate shaft 23 with the plurality of shift gear pairs 3.

[0038] In other words, the first motor 11 is used to drive the first transmission shaft 21 to rotate. The first transmission shaft 21 can be connected to the output shaft 24 through the second switching device to directly output power to the output shaft 24. Furthermore, since the first transmission shaft 21 is connected to the intermediate shaft 23, the rotation of the first transmission shaft 21 drives the intermediate shaft 23 to rotate. The third switching device can realize the transmission connection between the intermediate shaft 23 and the output shaft 24 through different shift gear pairs 3. That is, the first transmission shaft 21 can also adjust the power output to the output shaft 24 through the intermediate shaft 23 and the shift gear pairs 3 to realize the shifting operation. In addition, the second motor 12 is used to drive the second transmission shaft 22 to rotate. The second transmission shaft 22 can be connected to the output shaft 24 through the first switching device. The power output by the second motor 12 can be directly transmitted to the output shaft 24 through the second transmission shaft 22. For example, during the climbing process, the transmission connection between the second transmission shaft 22 and the output shaft 24 can be maintained to ensure that the second motor 12 can drive the output shaft 24 to keep rotating during the shifting process to avoid power interruption. This can avoid the jerking and slippage risk caused by power interruption during the shifting process, and can improve the stability and safety of vehicle driving.

[0039] Secondly, the second drive shaft 22 can be connected to the first drive shaft 21 via the first switching device, thereby enabling power coupling between the first motor 11 and the second motor 12 at the first drive shaft 21, increasing the driving force of the drive system 100. At the same time, gear shifting can be performed via the intermediate shaft 23, the third switching device, and the shift gear pair 3, meaning that the first motor 11 and the second motor 12 can share multiple gears on the output shaft 24 to achieve power output at different gears.

[0040] According to the first aspect of the present invention, the drive system 100 controls the transmission connection or disconnection between the second drive shaft 22 and the first drive shaft 21 and the output shaft 24 through the first switching device. This ensures that the first motor 11 and the second motor 12 can couple power output while ensuring that the second motor 12 can drive the output shaft 24 to keep rotating during gear shifting to avoid power interruption. This avoids the risk of jerking and slippage caused by power interruption during gear shifting, and improves the stability and safety of vehicle driving.

[0041] According to some embodiments of this utility model, such as Figure 5As shown, the intermediate shafts 23 are arranged circumferentially along the output shaft 24. That is, the first drive shaft 21 is connected to multiple intermediate shafts 23, and each intermediate shaft 23 can be connected to the output shaft 24 through multiple corresponding shift gear pairs 3. Thus, the first drive shaft 21 can simultaneously output power to the output shaft 24 through multiple intermediate shafts 23 and multiple corresponding shift gear pairs 3. The transmission structure has high stability and reliability, which can significantly improve the stability and reliability of the power output from the first drive shaft 21 to the output shaft 24.

[0042] In a specific example, the first drive shaft 21 is arranged coaxially with the output shaft 24, and the intermediate shaft 23 is located on the outer periphery of the output shaft 24. The first drive shaft 21 is provided with a fifth driving gear 81 at one end near the output shaft 24, and the intermediate shaft 23 is provided with a fifth driven gear 82 at one end near the first drive shaft 21. The fifth driving gear 81 and the fifth driven gear 82 mesh, thereby realizing the transmission connection between the first drive shaft 21 and the intermediate shaft 23.

[0043] According to some embodiments of this utility model, two intermediate shafts 23 are symmetrically distributed on opposite sides of the output shaft 24. This allows the two intermediate shafts 23 to uniformly transmit power to the output shaft 24 from symmetrical positions on both sides, improving the stability of power transmission from the two intermediate shafts 23 to the output shaft 24. Furthermore, the layout of the two intermediate shafts 23 is more regular, and the distance between them can be increased, reducing the assembly difficulty of the intermediate shafts 23 and the corresponding shift gear pair 3, and lowering the risk of interference.

[0044] According to some embodiments of the present invention, the second drive shaft 22 is adapted to be connected to the first drive shaft 21 via a first gear pair and is adapted to be connected to the output shaft 24 via a second gear pair. The first switching device is used to control the connection or disconnection of the first gear pair with the second drive shaft 22 and / or the first drive shaft 21, and is also used to control the connection or disconnection of the second gear pair with the second drive shaft 22 and / or with the output shaft 24.

[0045] This can be a connection where the first gear pair is connected to the first drive shaft 21 and is separable from the second drive shaft 22, and the second gear pair is connected to the output shaft 24 and is separable from the second drive shaft 22. The first switching device controls the connection or separation of the first and second gear pairs with the second drive shaft 22. For example, the first switching device can control the second drive shaft 22 to be connected to the first gear pair, achieving power coupling between the second motor 12 and the first motor 11, or switching the output gear through the intermediate shaft 23 and the shift gear pair 3. The first switching device can also control the second drive shaft 22 to be connected to the second gear pair, so that the second motor 12 can directly output power to the output shaft 24 to avoid power interruption during gear shifting; or it can be that the first… The gear pair is detachably connected to the first drive shaft 21 and connected to the second drive shaft 22. The second gear pair is detachably connected to the output shaft 24 and connected to the second drive shaft 22. The first switching device is used to control the connection or disconnection of the first gear pair and the first drive shaft 21, and to control the connection or disconnection of the second gear pair and the output shaft 24. For example, the first switching device can control the first drive shaft 21 to be connected to the first gear pair to realize the power coupling between the second motor 12 and the first motor 11, or switch the output gear through the intermediate shaft 23 and the shift gear pair 3. The first switching device can also control the output shaft 24 to be connected to the second gear pair so that the second motor 12 can directly output power to the output shaft 24 to avoid power interruption when shifting gears.

[0046] Of course, it can also be a connection where the first gear pair is connected to the first drive shaft 21 and is separable from the second drive shaft 22, and the second gear pair is separable from the output shaft 24 and is connected to the second drive shaft 22. The first switching device is used to control the transmission connection or disconnection between the first gear pair and the second drive shaft 22, and to control the transmission connection or disconnection between the second gear pair and the output shaft 24. Alternatively, it can be a connection where the first gear pair is separable from the first drive shaft 21 and is connected to the second drive shaft 22, and the second gear pair is connected to the output shaft 24 and is separable from the second drive shaft 22. The first switching device is used to control the transmission connection or disconnection between the first gear pair and the first drive shaft 21, and to control the transmission connection or disconnection between the second gear pair and the second drive shaft 22, etc., which will not be elaborated here.

[0047] According to some embodiments of this utility model, such as Figure 1 and Figure 5As shown, the first gear pair includes a first driving gear 41 loosely fitted on the second transmission shaft 22 and a first driven gear 42 fixed on the first transmission shaft 21. The second gear pair includes a second driving gear 51 loosely fitted on the second transmission shaft 22 and a second driven gear 52 fixed on the output shaft 24. The first switching device includes a first sliding sleeve, a first gear hub, a first gear ring, and a second gear ring. The first gear hub is fixed on the second transmission shaft 22. The first gear ring and the second gear ring are loosely fitted on the second transmission shaft 22 and are respectively connected to the first driven gear 42 and the second driven gear 52. The first sliding sleeve is slidable along the axial direction of the second transmission shaft 22 to control the connection or separation of the first gear hub from the first gear ring or the second gear ring.

[0048] When the first sliding sleeve is connected to the first gear hub and the first gear ring, the first gear hub drives the first driving gear 41 to rotate through the first sliding sleeve and the first gear ring. The second transmission shaft 22 is connected to the first transmission shaft 21 through the first gear hub, the first sliding sleeve, the first gear ring, the first driving gear 41 and the first driven gear 42. At this time, the first sliding sleeve is disconnected from the second gear ring, and the second transmission shaft 22 is disconnected from the output shaft 24. When the first sliding sleeve is connected to the first gear hub and the second gear ring, the first gear hub drives the second driving gear 51 to rotate through the first sliding sleeve and the second gear ring. The second transmission shaft 22 is connected to the output shaft 24 through the first gear hub, the first sliding sleeve, the second gear ring, the second driving gear 51 and the second driven gear 52. At this time, the first sliding sleeve is disconnected from the first gear ring, and the second transmission shaft 22 is disconnected from the first transmission shaft 21.

[0049] Therefore, the transmission connection or disconnection between the second transmission shaft 22 and the first transmission shaft 21 and the output shaft 24 can be achieved by sliding the first sleeve. This can simplify the structure of the first switching device. For example, it can be achieved by using only one clutch, the first clutch 25 shown in the figure. This can reduce the cost of the drive system 100 and reduce its size.

[0050] In a specific example, the first gear ring and the second gear ring are located on opposite sides of the first gear hub in the axial direction. The first drive gear 41 is connected to the side of the first gear ring away from the first gear hub, and the second drive gear 51 is connected to the side of the second gear ring away from the first gear hub. The diameters of the first drive gear 41 and the second drive gear 51 are larger than the diameters of the first gear hub, the first gear ring, and the second gear ring.

[0051] According to some embodiments of this utility model, such as Figure 3 and Figure 7As shown, a third driving gear 61 is provided on the motor shaft of the first motor 11, and the third driving gear 61 meshes with the first driven gear 42. That is, the first driving gear 41 and the third driving gear 61 mesh with the same gear, namely the first driven gear 42, to form a transmission. As a result, the number of gears on the first transmission shaft 21 can be reduced, thereby reducing the cost and size of the gearbox 20, and facilitating the arrangement of gears on the first transmission shaft 21, thus reducing the assembly difficulty of the gearbox 20.

[0052] According to some embodiments of this utility model, such as Figure 9-12 As shown, the first gear pair includes a first driving gear 41 fixed to the second transmission shaft 22 and a first driven gear 42 loosely fitted on the first transmission shaft 21. The second gear pair includes a second driving gear 51 fixed to the second transmission shaft 22 and a second driven gear 52 loosely fitted on the output shaft 24. The first switching device includes a second sliding sleeve, a third sliding sleeve, a second gear hub, a third gear hub, a third gear ring, and a fourth gear ring. The second gear hub is fixed to the first transmission shaft 21. The third gear ring is loosely fitted on the first transmission shaft 21 and connected to the first driven gear 42. The second sliding sleeve is slidable along the axial direction of the first transmission shaft 21 to control the connection or separation of the second gear hub and the third gear ring. The third gear hub is fixed to the output shaft 24. The fourth gear ring is loosely fitted on the output shaft 24 and connected to the second driven gear 52. The third sliding sleeve is slidable along the axial direction of the output shaft 24 to control the connection or separation of the third gear hub and the fourth gear ring.

[0053] When the second sliding sleeve is connected to the second gear hub and the third gear ring, the third gear ring drives the first drive shaft 21 to rotate through the second sliding sleeve and the second gear hub. The second drive shaft 22 is connected to the first drive shaft 21 via the first driving gear 41, the first driven gear 42, the third gear ring, the second sliding sleeve, and the third gear hub. When the second sliding sleeve is disconnected from the third gear ring, the second drive shaft 22 is disconnected from the first drive shaft 21. When the third sliding sleeve is connected to the third gear hub and the fourth gear ring, the fourth gear ring drives the output shaft 24 to rotate through the third sliding sleeve and the third gear hub. The second drive shaft 22 is connected to the output shaft 24 via the first driving gear 41, the first driven gear 42, the fourth gear ring, the third sliding sleeve, and the third gear hub. When the third sliding sleeve is disconnected from the fourth gear ring, the second drive shaft 22 is disconnected from the output shaft 24.

[0054] In other words, the first switching device includes two independently controllable clutches. Specifically, the second sliding sleeve, the second gear hub, and the third gear ring can constitute one of the clutches, as shown in the figure, the second clutch 26; the third sliding sleeve, the third gear hub, and the fourth gear ring can constitute the other clutch, as shown in the figure, the third clutch 27. Both clutches can be in an engaged state, that is, the second drive shaft 22 is simultaneously connected to the first drive shaft 21 and the output shaft 24. Thus, while ensuring uninterrupted power during gear shifting in the drive system 100, the number of gears in the gearbox 20 can be increased, specifically, the second drive shaft 22 is simultaneously connected to the first drive shaft 21 and the output shaft 24.

[0055] According to some embodiments of this utility model, a fourth driving gear 71 is provided on the motor shaft of the second motor 12, and the fourth driving gear 71 meshes with the first driving gear 41. That is, the first driven gear 42 and the fourth driving gear 71 mesh with the same gear, namely the first driving gear 41, to form a transmission. As a result, the number of gears on the second transmission shaft 22 can be reduced, thereby reducing the cost and size of the gearbox 20, and facilitating the arrangement of gears on the second transmission shaft 22, thus reducing the assembly difficulty of the gearbox 20.

[0056] According to some embodiments of this utility model, such as Figure 6 and Figure 8 As shown, the first drive shaft 21 is located on one side of the output shaft 24 in the axial direction. On the output shaft 24 in the axial direction, the second gear pair is located on the side of the intermediate shaft 23 opposite to the first drive shaft 21. It can be understood that the end of the intermediate shaft 23 closest to the first drive shaft 21 is connected to it. By placing the second gear pair on the side of the intermediate shaft 23 opposite to the first drive shaft 21, the length of the intermediate shaft 23 can be shortened, thereby reducing the installation space occupied by the gearbox 20.

[0057] According to some embodiments of the present invention, the shift gear pair 3 includes an intermediate shaft gear 31 fixed to the intermediate shaft 23 and an output shaft gear 32 loosely fitted on the output shaft 24. The second switching device includes a fourth sliding sleeve, a fourth toothed hub, a fifth toothed ring, and a sixth toothed ring. The fourth toothed hub is fixed to the output shaft 24. The fifth toothed ring is loosely fitted on the output shaft 24 and fixed to the first transmission shaft 21. The sixth toothed ring is loosely fitted on the output shaft 24 and connected to one of the output shaft gears 32. The fourth sliding sleeve is slidable along the axial direction of the output shaft 24 to control the connection or separation of the fourth toothed hub with the fifth toothed ring or the sixth toothed ring.

[0058] When the fourth sliding sleeve is connected to the fourth gear hub and the fifth gear ring, the fifth gear ring drives the output shaft 24 to rotate through the fourth sliding sleeve and the fourth gear hub. That is, the first transmission shaft 21 is connected to the output shaft 24 through the fifth gear ring, the fourth sliding sleeve, and the fourth gear hub, so that the first transmission shaft 21 can directly output power to the output shaft 24. At this time, the fourth sliding sleeve is disconnected from the sixth gear ring, and the output shaft gear 32 connected to the sixth gear ring is disconnected from the output shaft 24. When the fourth sliding sleeve is connected to the fourth gear hub and the sixth gear ring, the sixth gear ring drives the output shaft 24 to rotate through the fourth sliding sleeve and the fourth gear hub. The intermediate shaft 23 is connected to the output shaft 24 through the intermediate shaft gear 31, the output shaft gear 32 connected to the sixth gear ring, the sixth gear ring, the fourth sliding sleeve, and the fourth gear hub, so as to realize the speed change of the output power of the first transmission shaft 21. At this time, the fourth sliding sleeve is disconnected from the fifth gear ring.

[0059] Therefore, the direct connection between the first drive shaft 21 and the output shaft 24 can be achieved by sliding the fourth sleeve, while simultaneously enabling gear shifting. This simplifies the structure of the second switching device, as it can be achieved using only one clutch, the fourth clutch 28 shown in the figure, reducing the cost and size of the drive system 100. Furthermore, at any given time, the fourth sleeve can only connect to one of the fifth and sixth gear rings, preventing the first drive shaft 21 from directly outputting power to the output shaft 24 while simultaneously outputting power to the output shaft 24 via the shift gear pair 3, thus ensuring the safety of the gearbox 20.

[0060] It should be noted that this is only an explanation of one embodiment to illustrate that switching between two transmission connections can be achieved by using a single clutch. Of course, the second switching device may also include two clutches, such as one clutch for controlling the direct transmission connection between the first transmission shaft 21 and the output shaft 24, and the other clutch for controlling the connection or disconnection between the output shaft gear 32 and the output shaft 24, etc. No specific limitations are made here.

[0061] According to some embodiments of the present invention, the shift gear pair 3 includes an intermediate shaft gear 31 fixed to the intermediate shaft 23 and an output shaft gear 32 loosely fitted on the output shaft 24. The third switching device includes a fifth sliding sleeve, a fifth toothed hub, a seventh toothed ring, and an eighth toothed ring. The fifth toothed hub is fixed to the output shaft 24, and the fifth and sixth toothed rings are loosely fitted on the output shaft 24. The seventh and eighth toothed rings are respectively connected to an output shaft gear 32. The fifth sliding sleeve is slidable along the axial direction of the output shaft 24 to control the connection or separation of the fifth toothed hub with the seventh or eighth toothed ring.

[0062] When the fifth sliding sleeve is connected to the fifth gear hub and the seventh gear ring, the intermediate shaft 23 drives the output shaft 24 to rotate through the corresponding intermediate shaft gear 31, the output shaft gear 32 connected to the seventh gear ring, the seventh gear ring, the fifth sliding sleeve, and the fifth gear hub to achieve the transmission connection between the intermediate shaft 23 and the output shaft 24. At this time, the gearbox 20 is in the gear position corresponding to the shift gear pair 3 connected to the seventh gear ring, and the fifth sliding sleeve is disengaged from the eighth gear ring. When the fifth sliding sleeve is connected to the fifth gear ring and the eighth gear ring, the intermediate shaft 23 drives the output shaft 24 to rotate through the corresponding intermediate shaft gear 31, the output shaft gear 32 connected to the eighth gear ring, the eighth gear ring, the fifth sliding sleeve, and the fifth gear hub to achieve the transmission connection between the intermediate shaft 23 and the output shaft 24. At this time, the gearbox 20 is in the gear position corresponding to the shift gear pair 3 connected to the eighth gear ring, and the fifth sliding sleeve is disengaged from the eighth gear ring.

[0063] Therefore, switching between two gears can be achieved by sliding the fifth sleeve, which simplifies the structure of the third switching device. For example, it can be achieved with only one clutch, the fifth clutch 29 shown in the figure, reducing the cost and size of the drive system 100. Furthermore, at any given time, the fifth sleeve can only connect to one of the seventh and eighth gear rings, thus preventing damage to the transmission structure caused by simultaneous operation of two different gears, thereby improving the safety of the gearbox 20.

[0064] It should be noted that this is only an explanation of one embodiment to help understand that switching between two gears can be achieved by using a single clutch. The second switching device may also include two clutches, which are used to control two different gears, etc. No specific limitations are made here.

[0065] The following is for reference. Figures 1-12 This invention describes a drive system 100 according to a specific embodiment of the present invention. It is to be understood that the following description is merely exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0066] Example 1

[0067] like Figure 1 As shown, the drive system 100 includes a power unit 10 and a gearbox 20. The power unit 10 includes a first motor 11 and a second motor 12. The gearbox 20 includes a first drive shaft 21, a second drive shaft 22, an intermediate shaft 23, an output shaft 24, a first switching device, a second switching device, a third switching device, multiple shift gear pairs 3, a first gear pair, a second gear pair, a third gear pair, a fourth gear pair, a fifth gear pair, and an output gear 9.

[0068] Specifically, the first gear pair includes a first driving gear 41 loosely fitted on the second transmission shaft 22 and a first driven gear 42 fixed on the first transmission shaft 21. The second gear pair includes a second driving gear 51 loosely fitted on the second transmission shaft 22 and a second driven gear 52 fixed on the output shaft 24. The first switching device is a first clutch 25 and includes a first sliding sleeve, a first gear hub, a first gear ring, and a second gear ring. The first gear hub is fixed on the second transmission shaft 22. The first gear ring and the second gear ring are loosely fitted on the second transmission shaft 22 and located on opposite sides of the first gear hub. The first gear ring is connected to the first driving gear 41, and the second gear ring is connected to the second driving gear 51. The first sliding sleeve is slidable along the axial direction of the second transmission shaft 22 to connect with the first gear ring or the second gear ring.

[0069] The first motor 11 and the second motor 12 are located on the same side of the output shaft 24 in the axial direction. The third gear pair includes a third driving gear 61 fixed on the motor shaft of the first motor 11 and a third driven gear 62 fixed on the first transmission shaft 21. The diameter of the third driven gear 62 is larger than the diameter of the third driving gear 61, forming a reduction structure. The fourth gear pair includes a fourth driving gear 71 fixed on the motor shaft of the second motor 12 and a fourth driven gear 72 fixed on the second transmission shaft 22. The diameter of the fourth driven gear 72 is larger than the diameter of the fourth driving gear 71, forming a reduction structure. The fifth gear pair includes a fifth driving gear 81 fixed on the first transmission shaft 21 and a fifth driven gear 82 fixed on the intermediate shaft 23. The first driving gear 41 is located between the fourth driven gear 72 and the first clutch 25, and the first driven gear 42 is located between the third driven gear 62 and the fifth driving gear 81. The second switching device is a fourth clutch 28, which includes a fourth sliding sleeve, a fourth gear hub, a fifth gear ring, and a sixth gear ring. The fourth sliding sleeve, the fifth gear ring, and the sixth gear ring are all loosely fitted on the output shaft 24. The fourth gear hub is fixed on one end of the output shaft 24 near the first transmission shaft 21 and is located between the fifth gear ring and the second gear ring. The fifth gear ring is fixedly connected to the side of the fifth drive gear 81 facing the output shaft 24.

[0070] Multiple gear pairs 3 are spaced apart on the side of the fifth driven gear 82 away from the first motor 11. Each gear pair includes an intermediate shaft gear 31 fixed to the intermediate shaft 23 and an output shaft gear 32 loosely fitted on the output shaft 24. The intermediate shaft gears 31 of the multiple gear pairs have different diameters, and the diameters of the multiple intermediate shaft gears 31 gradually decrease in the direction away from the fifth driven gear 82. The third switching device is the fifth clutch 29 and is located on the side of the fourth clutch 28 away from the first drive shaft 21. The fifth clutch 29 includes a fifth sliding sleeve, a fifth gear hub, a seventh gear ring, and an eighth gear ring. The fifth sliding sleeve, the seventh gear ring, and the eighth gear ring are loosely fitted on the output shaft 24. The fifth gear hub is fixed to the output shaft 24 and is located between the seventh gear ring and the eighth gear ring. The second driven gear 52 is located between the sixth gear ring and the seventh gear ring. The sixth gear ring, the seventh gear ring, and the eighth gear ring are all connected to an output shaft gear 32. The output gear 9 is located at the end of the output shaft 24 away from the first motor 11 to output power to the outside.

[0071] Example 2

[0072] This embodiment has a largely the same structure as Embodiment 1, with identical components using the same reference numerals. Figure 2 The difference between this embodiment and embodiment one is that the second driven gear 52 is located on the side of the intermediate shaft 23 away from the first motor 11, and the second driven gear 52 is located between the fifth clutch 29 and the output gear 9.

[0073] Example 3

[0074] This embodiment has a largely the same structure as Embodiment 1, with identical components using the same reference numerals. Figure 3 The difference between this embodiment and the first embodiment is that the third driving gear 61 meshes with the first driven gear 42 to form a third gear pair. The first driven gear 42 can be used to transmit power from the second drive shaft 22 to the first drive shaft 21, and can also be used as a speed reduction structure for the output of the first motor 11, thus eliminating the need for the third driven gear 62.

[0075] Example 4

[0076] This embodiment has a largely the same structure as Embodiment 3, with identical components using the same reference numerals. Figure 4 The difference between this embodiment and embodiment one is that the second driven gear 52 is located on the side of the intermediate shaft 23 away from the first motor 11, and the second driven gear 52 is located between the fifth clutch 29 and the output gear 9.

[0077] Example 5

[0078] This embodiment has a largely the same structure as Embodiment 1, with identical components using the same reference numerals. Figure 5The difference between this embodiment and embodiment five is that: the intermediate shaft 23 has two distributed on opposite sides of the output shaft 24, and both intermediate shafts 23 can be connected to the output shaft 24 through corresponding shift gear pairs 3.

[0079] Example 6

[0080] This embodiment has a largely the same structure as Embodiment 5, with identical components using the same reference numerals. Figure 6 The difference between this embodiment and embodiment five is that the second driven gear 52 is located on the side of the intermediate shaft 23 away from the first motor 11, and the second driven gear 52 is located between the fifth clutch 29 and the output gear 9.

[0081] Example 7

[0082] This embodiment has a largely the same structure as Embodiment 5, with identical components using the same reference numerals. Figure 7 The difference between this embodiment and embodiment five is that the third driving gear 61 meshes with the first driven gear 42 to form a third gear pair. The first driven gear 42 can be used to transmit power from the second drive shaft 22 to the first drive shaft 21, and can also be used as a speed reduction structure for the output of the first motor 11, thus eliminating the need for the third driven gear 62.

[0083] Example 8

[0084] This embodiment has a largely the same structure as Embodiment Seven, with identical components using the same reference numerals. Figure 8 The difference between this embodiment and embodiment seven is that the second driven gear 52 is located on the side of the intermediate shaft 23 away from the first motor 11, and the second driven gear 52 is located between the fifth clutch 29 and the output gear 9.

[0085] Example 9

[0086] This embodiment has a largely the same structure as Embodiment 5, with identical components using the same reference numerals. Figure 9 The difference between this embodiment and Embodiment 5 is that: the first driving gear 41 and the second driving gear 51 are fixedly mounted on the second transmission shaft 22; the first driven gear 42 is loosely fitted on the first transmission shaft 21; the second driven gear 52 is loosely fitted on the output shaft 24; the first switching device includes a second clutch 26 and a third clutch 27; the second clutch 26 includes a second sliding sleeve, a second gear hub, and a third gear ring; both the second sliding sleeve and the third gear ring are loosely fitted on the first transmission shaft 21; the second gear hub is fixedly mounted on the first transmission shaft 21; and the third gear ring is fixedly connected to the first driven gear 42. The third clutch 27 includes a third sliding sleeve, a third gear hub, and a fourth gear ring; both the third sliding sleeve and the fourth gear ring are loosely fitted on the output shaft 24; the third gear hub is fixedly mounted on the output shaft 24; and the fourth gear ring is fixedly connected to the second driven gear 52.

[0087] Example 10

[0088] This embodiment has a largely the same structure as Embodiment Nine, with identical components using the same reference numerals. Figure 10 The difference between this embodiment and embodiment nine is that the second driven gear 52 is located on the side of the intermediate shaft 23 away from the first motor 11, and the second driven gear 52 is located between the fifth clutch 29 and the output gear 9.

[0089] Example 11

[0090] This embodiment has a largely the same structure as Embodiment Nine, with identical components using the same reference numerals. Figure 11 The difference between this embodiment and embodiment nine is that the fourth driving gear 71 meshes with the first driving gear 41 to form a fourth gear pair. The first driving gear 41 can be used to transmit power to the first transmission shaft 21 and can also be used as a speed reduction structure for the output of the second motor 12, thus eliminating the need for the fourth driven gear 72.

[0091] Example 12

[0092] This embodiment has a largely the same structure as Embodiment Eleven, with identical components using the same reference numerals. Figure 12 The difference between this embodiment and embodiment nine is that the second driven gear 52 is located on the side of the intermediate shaft 23 away from the first motor 11, and the second driven gear 52 is located between the fifth clutch 29 and the output gear 9.

[0093] It should be noted that the reduction structure consisting of the first motor 11 and the third gear pair, as well as the reduction structure consisting of the second motor 12 and the fourth gear pair, can also be replaced by direct motor connection, dual motors coupled with parallel shaft reduction, or motors and planetary gear set for reduction, etc. No specific restrictions are made here.

[0094] The vehicle according to a second aspect embodiment of the present invention is described below with reference to the accompanying drawings.

[0095] A vehicle according to a second aspect of the present invention includes a drive system 100.

[0096] According to the second aspect of the present invention, the vehicle controls the transmission connection or disconnection between the second drive shaft 22 and the first drive shaft 21 and the output shaft 24 through the first switching device. This ensures that the power coupling output of the first motor 11 and the second motor 12 is maintained, while ensuring that the second motor 12 can drive the output shaft 24 to keep rotating during the gear shifting process to avoid power interruption. This avoids the risk of jerking and slippage caused by power interruption during gear shifting, and improves the stability and safety of the vehicle.

[0097] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0098] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0099] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A drive system, characterized in that, include: The power unit includes a first motor and a second motor; A gearbox includes a first drive shaft, a second drive shaft, an intermediate shaft, an output shaft, a first switching device, a second switching device, and a third switching device. The first drive shaft is driven to the motor shaft of a first motor, and the second drive shaft is driven to the motor shaft of a second motor. The first switching device is used to control the drive connection or disconnection between the second drive shaft and the first drive shaft and the output shaft. The second switching device is at least used to control the drive connection or disconnection between the first drive shaft and the output shaft. The intermediate shaft is driven to the first drive shaft and is adapted to be driven to the output shaft through multiple shift gear pairs. The third switching device is used to control the connection or disconnection between the output shaft and / or the intermediate shaft and the multiple shift gear pairs.

2. The drive system according to claim 1, characterized in that, The intermediate shaft has multiple members arranged circumferentially along the output shaft.

3. The drive system according to claim 1, characterized in that, The second drive shaft is adapted to be driven to the first drive shaft via a first gear pair and adapted to be driven to the output shaft via a second gear pair. The first switching device is used to control the drive connection or disconnection between the first gear pair and the second drive shaft and / or the first drive shaft, and to control the drive connection or disconnection between the second gear pair and the second drive shaft and / or the output shaft.

4. The drive system according to claim 3, characterized in that, The first gear pair includes a first driving gear loosely fitted on the second transmission shaft and a first driven gear fixed on the first transmission shaft. The second gear pair includes a second driving gear loosely fitted on the second transmission shaft and a second driven gear fixed on the output shaft. The first switching device includes a first sliding sleeve, a first gear hub, a first gear ring, and a second gear ring. The first gear hub is fixed on the second transmission shaft. The first gear ring and the second gear ring are loosely fitted on the second transmission shaft and are respectively connected to the first driven gear and the second driven gear. The first sliding sleeve is slidable along the axial direction of the second transmission shaft to control the connection or separation of the first gear hub from the first gear ring or the second gear ring.

5. The drive system according to claim 4, characterized in that, The first motor has a third driving gear on its motor shaft, and the third driving gear meshes with the first driven gear.

6. The drive system according to claim 3, characterized in that, The first gear pair includes a first driving gear fixed to the second transmission shaft and a first driven gear loosely fitted on the first transmission shaft. The second gear pair includes a second driving gear fixed to the second transmission shaft and a second driven gear loosely fitted on the output shaft. The first switching device includes a second sliding sleeve, a third sliding sleeve, a second gear hub, a third gear hub, a third gear ring, and a fourth gear ring. The second gear hub is fixed to the first transmission shaft, and the third gear ring is loosely fitted on the first transmission shaft and connected to the first driven gear. The second sliding sleeve is slidable along the axial direction of the first transmission shaft to control the connection or separation of the second gear hub and the third gear ring. The third gear hub is fixed to the output shaft, and the fourth gear ring is loosely fitted on the output shaft and connected to the second driven gear. The third sliding sleeve is slidable along the axial direction of the output shaft to control the connection or separation of the third gear hub and the fourth gear ring.

7. The drive system according to claim 6, characterized in that, The second motor has a fourth drive gear on its motor shaft, and the fourth drive gear meshes with the first drive gear.

8. The drive system according to claim 3, characterized in that, The first drive shaft is located on the axial side of the output shaft, and the second gear pair is located on the axial side of the intermediate shaft opposite to the first drive shaft.

9. The drive system according to claim 1, characterized in that, The shift gear pair includes an intermediate shaft gear fixed to the intermediate shaft and an output shaft gear loosely fitted on the output shaft; wherein; The second switching device includes a fourth sliding sleeve, a fourth gear hub, a fifth gear ring, and a sixth gear ring. The fourth gear hub is fixed to the output shaft. The fifth gear ring is loosely fitted onto the output shaft and fixed to the first transmission shaft. The sixth gear ring is loosely fitted onto the output shaft and connected to one of the output shaft gears. The fourth sliding sleeve is slidable along the axial direction of the output shaft to control the connection or separation of the fourth gear hub from the fifth or sixth gear ring; and / or, The third switching device includes a fifth sliding sleeve, a fifth toothed hub, a seventh toothed ring, and an eighth toothed ring. The fifth toothed hub is fixed to the output shaft. The fifth toothed ring and the sixth toothed ring are loosely fitted on the output shaft. The seventh toothed ring and the eighth toothed ring are respectively connected to one of the output shaft gears. The fifth sliding sleeve is slidable along the axial direction of the output shaft to control the connection or separation of the fifth toothed hub from the seventh or eighth toothed ring.

10. A vehicle, characterized in that, include: The drive system according to any one of claims 1-9.

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