Driving system and vehicle

Abstract

The invention 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 stability and safety of vehicle running can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle drive devices, and in particular to a drive system and a vehicle. Background Art

[0002] With the continuous development of the new energy vehicle industry, the drive system with multiple motors coupled to output power has gradually been popularized and applied to different models. However, in the gearbox solution with multiple motors coupled to input in the related technology, there is a problem of power interruption during the gear shifting process. For example, during the climbing process, the power interruption will cause the vehicle to have difficulty in shifting gears, with obvious frustration and the risk of slipping, which directly affects the comfort and safety of the vehicle. Summary of the invention

[0003] A first aspect of the present invention provides a driving system, which has the advantage of ensuring that power is not interrupted during a gear shifting process.

[0004] According to the first aspect of the present invention, the drive system comprises: a power unit, comprising a first motor and a second motor; a gearbox, comprising a first transmission shaft, a second transmission shaft, an intermediate shaft, an output shaft, a first switching device, a second switching device and a third switching device, wherein the first transmission shaft is drivingly connected to the motor shaft of the first motor, the second transmission shaft is drivingly connected to the motor shaft of the second motor, the first switching device is used to control the driving connection or disconnection of the second transmission shaft with the first transmission shaft and the output shaft, the second switching device is at least used to control the driving connection or disconnection of the first transmission shaft with the output shaft, the intermediate shaft is drivingly connected to the first transmission shaft, and the intermediate shaft is suitable for driving connection with the output shaft through multiple shift gear pairs, and the third switching device is used to control the connection or disconnection of the output shaft and / or the intermediate shaft with the multiple 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 of the second transmission shaft with the first transmission shaft and the output shaft, so that the power coupling output of the first motor and the second motor can be ensured while ensuring that the second motor can drive the output shaft to keep rotating during the gear shifting process to avoid power interruption, thereby avoiding the risk of stalling and slipping caused by power interruption during the gear shifting process, and improving the stability and safety of vehicle driving.

[0006] According to some embodiments of the present invention, a plurality of intermediate shafts are provided and are arranged at intervals along the circumference of the output shaft.

[0007] According to some embodiments of the present invention, the second transmission shaft is suitable for being transmission-connected to the first transmission shaft through a first gear pair and is suitable for being transmission-connected to the output shaft through a second gear pair, and the first switching device is used to control the transmission connection or disconnection between the first gear pair and the second transmission shaft and / or the first transmission shaft, and is used to control the transmission connection or disconnection between the second gear pair and the second transmission 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 mounted on the second transmission shaft and a first passive gear fixed to the first transmission shaft, the second gear pair includes a second driving gear loosely mounted on the second transmission shaft and a second passive gear fixed to the output shaft, the first switching device includes a first sleeve, a first gear hub, a first gear ring and a second gear ring, the first gear hub is fixed to the second transmission shaft, the first gear ring and the second gear ring are loosely mounted on the second transmission shaft and the first gear ring and the second gear ring are respectively connected to the first passive gear and the second passive gear, and the first sleeve is slidable along the axial direction of the second transmission shaft to control the first gear hub to connect or separate with the first gear ring or the second gear ring.

[0009] According to some embodiments of the present invention, a third driving gear is disposed on the motor shaft of the first motor, and the third driving gear is meshed with the first passive 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 passive gear loosely mounted on the first transmission shaft, the second gear pair includes a second driving gear fixed to the second transmission shaft and a second passive gear loosely mounted on the output shaft, the first switching device includes a second sleeve, a third 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, the third gear ring is loosely mounted on the first transmission shaft and connected to the first passive gear, the second 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, the fourth gear ring is loosely mounted on the output shaft and connected to the second passive gear, and the third 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.

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

[0012] According to some embodiments of the present invention, the first transmission shaft is located on one side of the output shaft in the axial direction, and the second gear pair is located on a side of the intermediate shaft away from the first transmission shaft in the axial direction of the output 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 mounted on the output shaft; wherein the second switching device includes a fourth 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 mounted on the output shaft and fixed to the first transmission shaft, the sixth gear ring is loosely mounted on the output shaft and connected to one of the output shaft gears, and the fourth sleeve is slidable along the axial direction of the output shaft to control the connection or separation of the fourth gear hub with the fifth gear ring or the sixth gear ring; and / or, the third switching device includes a fifth sleeve, a fifth gear hub, a seventh gear ring and an eighth gear ring, the fifth gear hub is fixed to the output shaft, the fifth gear ring and the sixth gear ring are loosely mounted on the output shaft, the seventh gear ring and the eighth gear ring are respectively connected to one of the output shaft gears, and the fifth sleeve is slidable along the axial direction of the output shaft to control the connection or separation of the fifth gear hub with the seventh gear ring or the eighth gear ring.

[0014] A second aspect of the present invention provides a vehicle.

[0015] A vehicle according to an embodiment of the second aspect of the present invention includes: the above-mentioned drive system.

[0016] According to the vehicle of the second aspect of the embodiment of the present invention, the first switching device controls the transmission connection or disconnection of the second transmission shaft with the first transmission shaft and the output shaft, so that while ensuring the power coupling output of the first motor and the second motor, the second motor can drive the output shaft to keep rotating during the gear shifting process to avoid power interruption, thereby avoiding the risk of stalling and rolling caused by power interruption during the gear shifting process, and improving the stability and safety of vehicle driving.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic diagram of a driving system according to a first embodiment of the present invention;

[0019] Figure 2 is a schematic diagram of a driving system according to a second embodiment of the present invention;

[0020] Figure 3 is a schematic diagram of a driving system according to a third embodiment of the present invention;

[0021] Figure 4 is a schematic diagram of a driving system according to a fourth embodiment of the present invention;

[0022] Figure 5 is a schematic diagram of a driving system according to a fifth embodiment of the present invention;

[0023] Figure 6 is a schematic diagram of a driving system according to a sixth embodiment of the present invention;

[0024] Figure 7 is a schematic diagram of a driving system according to a seventh embodiment of the present invention;

[0025] Figure 8 is a schematic diagram of a driving system according to an eighth embodiment of the present invention;

[0026] Fig. 9 is a schematic diagram of a driving system according to a ninth embodiment of the present invention;

[0027] Fig.10 is a schematic diagram of a driving system according to a tenth embodiment of the present invention;

[0028] Fig.11 is a schematic diagram of a driving system according to an eleventh embodiment of the present invention;

[0029] Fig.12 is a schematic diagram of a driving system according to a twelfth embodiment of the present invention.

[0030] Reference numerals:

[0031] 100. Drive system;

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

[0033] 20. Gearbox; 21. First transmission shaft; 22. Second transmission 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 passive gear; 51. Second driving gear; 52. Second passive gear; 61. Third driving gear; 62. Third passive gear; 71. Fourth driving gear; 72. Fourth passive gear; 81. Fifth driving gear; 82. Fifth passive gear; 9. Output gear. DETAILED DESCRIPTION

[0034] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0035] The disclosure below provides many different embodiments or examples to implement different structures of the present invention. In order to simplify the disclosure of the present invention, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention. In addition, the present invention can repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplicity and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides various specific processes and examples of materials, but those of ordinary skill in the art can be aware of the applicability of other processes and / or the use of other materials.

[0036] The following describes a drive system 100 according to an embodiment of the first aspect of the present invention with reference to the accompanying drawings.

[0037] like Figure 1-Figure 4 As shown, the drive system 100 according to the first aspect of the 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 transmission shaft 21, a second transmission 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 transmission shaft 21 is drivingly connected to the motor shaft of the first motor 11, the second transmission shaft 22 is drivingly connected to the motor shaft of the second motor 12, the first switching device is used to control the transmission connection or disconnection of the second transmission shaft 22 with the first transmission shaft 21 and the output shaft 24, the second switching device is at least used to control the transmission connection or disconnection of the first transmission shaft 21 with the output shaft 24, the intermediate shaft 23 is drivingly connected to the first transmission shaft 21, and the intermediate shaft 23 is suitable for being drivingly connected to the output shaft 24 through a plurality of shift gear pairs 3, and the third switching device is used to control the connection or disconnection of the output shaft 24 and / or the intermediate shaft 23 with a plurality of shift gear pairs 3.

[0038] That is to say, the first motor 11 is used to drive the first transmission shaft 21 to rotate, and 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, and because the first transmission shaft 21 is transmission-connected to the intermediate shaft 23, the intermediate shaft 23 is driven to rotate when the first transmission shaft 21 rotates, and the transmission connection between the intermediate shaft 23 and the output shaft 24 through different shifting gear pairs 3 can be realized through the third switching device, 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 shifting gear pair 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 climbing, 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 gear shifting process to avoid power interruption, thereby avoiding the risk of stalling and slipping caused by power interruption during the gear shifting process, and improving the stability and safety of the vehicle's driving.

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

[0040] According to the drive system 100 of the first aspect of the present invention, the first switching device controls the transmission connection or disconnection of the second transmission shaft 22 with the first transmission shaft 21 and the output shaft 24. While ensuring the power coupling output of the first motor 11 and the second motor 12, it can ensure that the second motor 12 can drive the output shaft 24 to keep rotating during the gear shifting process to avoid power interruption, thereby avoiding the risk of stalling and rolling caused by power interruption during the gear shifting process, and improving the stability and safety of vehicle driving.

[0041] According to some embodiments of the present invention, Figure 5As shown, the intermediate shaft 23 is provided with a plurality of intermediate shafts 23 arranged at intervals along the circumference of the output shaft 24. That is to say, the first transmission shaft 21 is transmission-connected with the plurality of intermediate shafts 23, and each intermediate shaft 23 can be transmission-connected with the output shaft 24 through the corresponding plurality of shifting gear pairs 3, so that the first transmission shaft 21 can output power to the output shaft 24 through the plurality of intermediate shafts 23 and the plurality of shifting gear pairs 3 of the corresponding gear positions at the same time, and the transmission structure has high stability and reliability, which can well improve the stability and reliability of the power output from the first transmission shaft 21 to the output shaft 24.

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

[0043] According to some embodiments of the present invention, two intermediate shafts 23 are symmetrically distributed on opposite sides of the output shaft 24. Thus, the two intermediate shafts 23 can evenly transmit power to the output shaft 24 from symmetrical positions on both sides of the output shaft 24, which can improve the stability of the power transmission from the two intermediate shafts 23 to the output shaft 24. In addition, the layout of the two intermediate shafts 23 is more regular, and the distance between the two intermediate shafts 23 can be increased, so as to reduce the difficulty of assembling the intermediate shafts 23 and the corresponding shift gear pair 3, and reduce the risk of interference.

[0044] According to some embodiments of the present invention, the second transmission shaft 22 is suitable for being transmission-connected to the first transmission shaft 21 via a first gear pair and is suitable for being transmission-connected to the output shaft 24 via a second gear pair, and the first switching device is used to control the transmission connection or disconnection between the first gear pair and the second transmission shaft 22 and / or the first transmission shaft 21, and is used to control the transmission connection or disconnection between the second gear pair and the second transmission shaft 22 and / or the output shaft 24.

[0045] Among them, the first gear pair can be connected to the first transmission shaft 21 and can be separated from the second transmission shaft 22, the second gear pair is connected to the output shaft 24 and can be separated from the second transmission shaft 22, and the first switching device is used to control the connection or separation of the first gear pair and the second gear pair with the second transmission shaft 22. For example, the first switching device can control the second transmission shaft 22 to be connected to the first gear pair for transmission connection, so as 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 shifting gear pair 3. The first switching device can also control the second transmission shaft 22 to be connected to the second gear pair for transmission connection, so that the second motor 12 can directly output power to the output shaft 24 to avoid power interruption during gear shifting; it can also be that the first The gear pair is detachably connected to the first transmission shaft 21 and is connected to the second transmission shaft 22. The second gear pair is detachably connected to the output shaft 24 and is connected to the second transmission shaft 22. The first switching device is used to control the connection or separation of the first gear pair and the first transmission shaft 21, and is used to control the connection or separation of the second gear pair and the output shaft 24. For example, the first switching device can control the transmission connection between the first transmission shaft 21 and the first gear pair to achieve power coupling between the second motor 12 and the first motor 11 or switch the output gear through the intermediate shaft 23 and the shifting gear pair 3. The first switching device can also control the transmission connection between the output shaft 24 and 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.

[0046] Of course, the first gear pair may be connected to the first transmission shaft 21 and detachably connected to the second transmission shaft 22, the second gear pair may be detachably connected to the output shaft 24 and connected to the second transmission shaft 22, and the first switching device may be used to control the transmission connection or disconnection between the first gear pair and the second transmission shaft 22, and control the transmission connection or disconnection between the second gear pair and the output shaft 24; the first gear pair may be detachably connected to the first transmission shaft 21 and connected to the second transmission shaft 22, the second gear pair may be connected to the output shaft 24 and detachably connected to the second transmission shaft 22, and the first switching device may be used to control the transmission connection or disconnection between the first gear pair and the first transmission shaft 21, and control the transmission connection or disconnection between the second gear pair and the second transmission shaft 22, and so on, which will not be elaborated here.

[0047] According to some embodiments of the present invention, Figure 1 and Figure 5As shown, the first gear pair includes a first driving gear 41 that is loosely mounted on the second transmission shaft 22 and a first passive gear 42 that is fixed to the first transmission shaft 21, the second gear pair includes a second driving gear 51 that is loosely mounted on the second transmission shaft 22 and a second passive gear 52 that is fixed to the output shaft 24, the first switching device includes a first sleeve, a first gear hub, a first gear ring and a second gear ring, the first gear hub is fixed to the second transmission shaft 22, the first gear ring and the second gear ring are loosely mounted on the second transmission shaft 22 and the first gear ring and the second gear ring are respectively connected to the first passive gear 42 and the second passive gear 52, the first sleeve is slidable along the axial direction of the second transmission shaft 22 to control the first gear hub to be connected or separated from the first gear ring or the second gear ring.

[0048] Among them, when the first 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 sleeve and the first gear ring, and the second transmission shaft 22 is transmission-connected to the first transmission shaft 21 through the first gear hub, the first sleeve, the first gear ring, the first driving gear 41 and the first passive gear 42. At this time, the first sleeve is disconnected from the second gear ring, and the second transmission shaft 22 is disconnected from the output shaft 24; when the first 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 sleeve and the second gear ring, and the second transmission shaft 22 is transmission-connected to the output shaft 24 through the first gear hub, the first sleeve, the second gear ring, the second driving gear 51 and the second passive gear 52. At this time, the first 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 through the sliding of the first sleeve, which can greatly simplify the structure of the first switching device. For example, it can be achieved through only one clutch such as the first clutch 25 shown in the figure, which can reduce the cost of the drive system 100 and reduce the size of the drive system 100.

[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 driving gear 41 is connected to the side of the first gear ring away from the first gear hub, and the second driving gear 51 is connected to the side of the second gear ring away from the first gear hub, and the diameters of the first driving gear 41 and the second driving gear 51 are greater than the diameters of the first gear hub, the first gear ring and the second gear ring.

[0051] According to some embodiments of the present invention, 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 is meshed with the first passive gear 42. That is to say, the first driving gear 41 and the third driving gear 61 are meshed with the same gear, i.e., the first passive gear 42, to form a transmission. Thus, the number of gears on the first transmission shaft 21 can be reduced to reduce the cost of the gearbox 20 and reduce the volume of the gearbox 20, and at the same time, the gear arrangement on the first transmission shaft 21 is facilitated to reduce the difficulty of assembling the gearbox 20.

[0052] According to some embodiments of the present invention, 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 passive gear 42 loosely sleeved 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 passive gear 52 loosely sleeved on the output shaft 24, the first switching device includes a second sleeve, a third 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 sleeved on the first transmission shaft 21 and connected to the first passive gear 42, the second 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 sleeved on the output shaft 24 and connected to the second passive gear 52, and the third 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] Among them, when the second sleeve is connected to the second gear hub and the third gear ring, the third gear ring drives the first transmission shaft 21 to rotate through the second sleeve and the second gear hub, and the second transmission shaft 22 is connected to the first transmission shaft 21 through the first driving gear 41, the first passive gear 42, the third gear ring, the second sleeve and the third gear hub; when the second sleeve is disconnected from the third gear ring, the second transmission shaft 22 is disconnected from the first transmission shaft 21. When the third 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 sleeve and the third gear hub, and the second transmission shaft 22 is connected to the output shaft 24 through the first driving gear 41, the first passive gear 42, the fourth gear ring, the third sleeve and the third gear hub; when the third sleeve is disconnected from the fourth gear ring, the second transmission shaft 22 is disconnected from the output shaft 24.

[0054] In other words, the first switching device includes two clutches that can be controlled independently. Specifically, the second sleeve, the second gear hub and the third gear ring can constitute one of the clutches, such as the second clutch 26 shown in the figure, and the third sleeve, the third gear hub and the fourth gear ring can constitute another clutch, such as the third clutch 27 shown in the figure. Both clutches can be in an engaged state, that is, the second transmission shaft 22 is simultaneously connected to the first transmission shaft 21 and the output shaft 24. Thus, while ensuring that the power is not interrupted during the gear shift of the drive system 100, the number of gears of the gearbox 20 can be increased, specifically, the gears in which the second transmission shaft 22 is simultaneously connected to the first transmission shaft 21 and the output shaft 24.

[0055] According to some embodiments of the present invention, a fourth driving gear 71 is provided on the motor shaft of the second motor 12, and the fourth driving gear 71 is meshed with the first driving gear 41. That is, the first passive gear 42 and the fourth driving gear 71 are meshed with the same gear, i.e., the first driving gear 41, to form a transmission. Thus, the number of gears on the second transmission shaft 22 can be reduced to reduce the cost of the gearbox 20 and the size of the gearbox 20, and the gear arrangement on the second transmission shaft 22 is facilitated to reduce the difficulty of assembling the gearbox 20.

[0056] According to some embodiments of the present invention, Figure 6 and Figure 8 As shown, the first transmission shaft 21 is located at one side of the output shaft 24 in the axial direction, and the second gear pair is located at the side of the intermediate shaft 23 away from the first transmission shaft 21 in the axial direction of the output shaft 24. It can be understood that the end of the intermediate shaft 23 close to the first transmission shaft 21 is transmission-connected with the first transmission shaft 21, and by arranging the second gear pair at the side of the intermediate shaft 23 away from the first transmission shaft 21, the length of the intermediate shaft 23 can be shortened to reduce 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 mounted on the output shaft 24, the second switching device includes a fourth sleeve, a fourth gear hub, a fifth gear ring and a sixth gear ring, the fourth gear hub is fixed to the output shaft 24, the fifth gear ring is loosely mounted on the output shaft 24 and fixed to the first transmission shaft 21, the sixth gear ring is loosely mounted on the output shaft 24 and connected to one of the output shaft gears 32, and the fourth sleeve is slidable along the axial direction of the output shaft 24 to control the connection or separation of the fourth gear hub and the fifth gear ring or the sixth gear ring.

[0058] Among them, when the fourth sleeve is connected with the fourth gear hub and the fifth gear ring, the fifth gear ring drives the output shaft 24 to rotate through the fourth 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 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 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 sleeve is connected with the fourth gear hub and the sixth gear ring, the sixth gear ring drives the output shaft 24 to rotate through the fourth sleeve and the fourth gear hub, and 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 sleeve and the fourth gear hub, so as to achieve the speed change of the output power of the first transmission shaft 21. At this time, the fourth sleeve is disconnected from the fifth gear ring.

[0059] Therefore, the first transmission shaft 21 can be directly connected to the output shaft 24 by sliding the fourth sleeve, and gear shifting can be achieved at the same time, which can simplify the structure of the second switching device. For example, it can be achieved by only one clutch, such as the fourth clutch 28 shown in the figure, which can reduce the cost of the drive system 100 and reduce the volume of the drive system 100. In addition, at the same time, the fourth sleeve can only be connected to one of the fifth gear ring and the sixth gear ring, which can avoid the first transmission shaft 21 directly outputting power to the output shaft 24 while outputting power to the output shaft 24 through the shift gear pair 3, so as to ensure the safety of the gearbox 20.

[0060] It should be noted that only one of the embodiments is described here to facilitate understanding that switching between two transmission connections can be achieved through one clutch. Of course, the second switching device can also include two clutches, such as, one clutch is used to control the direct transmission connection between the first transmission shaft 21 and the output shaft 24, and the other clutch is used to control the connection or disconnection of the output shaft gear 32 and the output shaft 24, etc., and no specific restrictions 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 mounted on the output shaft 24, the third switching device includes a fifth sleeve, a fifth gear hub, a seventh gear ring and an eighth gear ring, the fifth gear hub is fixed to the output shaft 24, the fifth gear ring and the sixth gear ring are loosely mounted on the output shaft 24, the seventh gear ring and the eighth gear ring are respectively connected to an output shaft gear 32, and the fifth sleeve can slide along the axial direction of the output shaft 24 to control the connection or separation of the fifth gear hub and the seventh gear ring or the eighth gear ring.

[0062] Among them, when the fifth sleeve is connected with 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 with the seventh gear ring, the seventh gear ring, the fifth sleeve and the fifth gear hub to realize 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 with the seventh gear ring, and the fifth sleeve is disconnected from the eighth gear ring; when the fifth sleeve is connected with 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 with the eighth gear ring, the eighth gear ring, the fifth sleeve and the fifth gear hub to realize 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 with the eighth gear ring, and the fifth sleeve is disconnected from the eighth gear ring.

[0063] Therefore, the switching of two gears can be realized by sliding the fifth sliding sleeve, which can simplify the structure of the third switching device, for example, it can be realized by only one clutch such as the fifth clutch 29 shown in the figure, which can reduce the cost of the drive system 100 and reduce the volume of the drive system 100. In addition, at the same time, the fifth sliding sleeve can only be connected to one of the seventh gear ring and the eighth gear ring, so as to avoid damage to the transmission structure caused by the simultaneous working output of two different gears, so as to improve the safety of the use of the gearbox 20.

[0064] It should be noted that only one of the embodiments is described here to facilitate understanding that the switching of two gears can be achieved through one clutch. The second switching device can also include two clutches, and the two clutches are respectively used to control two different gears, and so on. No specific limitation is made here.

[0065] Reference below Figure 1-Figure 12 The drive system 100 according to a specific embodiment of the present invention is described. It is worth noting that the following description is only exemplary and intended to be used to explain the present invention, and cannot be understood as limiting the present invention.

[0066] Embodiment 1

[0067] like Figure 1 As shown, the drive system 100 includes a power unit 10 and a gearbox 20, wherein the power unit 10 includes a first motor 11 and a second motor 12, and the gearbox 20 includes a first transmission shaft 21, a second transmission shaft 22, an intermediate shaft 23, an output shaft 24, a first switching device, a second switching device, a third switching device, a plurality of 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 that is loosely mounted on the second transmission shaft 22 and a first passive gear 42 that is fixed to the first transmission shaft 21. The second gear pair includes a second driving gear 51 that is loosely mounted on the second transmission shaft 22 and a second passive gear 52 that is fixed to the output shaft 24. The first switching device is a first clutch 25 and includes a first sleeve, a first gear hub, a first gear ring and a second gear ring. The first gear hub is fixed to the second transmission shaft 22. The first gear ring and the second gear ring are loosely mounted on the second transmission shaft 22 and are 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 sleeve can slide along the axial direction of the second transmission shaft 22 to connect to 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 greater than the diameter of the third driving gear 61 to form 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 greater than the diameter of the fourth driving gear 71 to form 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 and includes a fourth sleeve, a fourth gear hub, a fifth gear ring and a sixth gear ring. The fourth sleeve, the fifth gear ring and the sixth gear ring are all loosely mounted on the output shaft 24. The fourth gear hub is fixed to one end of the output shaft 24 close to 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 driving gear 81 facing the output shaft 24.

[0070] A plurality of gear pairs 3 are arranged at intervals on the side of the fifth driven gear 82 away from the first motor 11. The gear pair includes an intermediate shaft gear 31 fixedly mounted on the intermediate shaft 23 and an output shaft gear 32 loosely mounted on the output shaft 24. The diameters of the intermediate shaft gears 31 of the plurality of gear pairs are different. In the direction away from the fifth driven gear 82, the diameters of the plurality of intermediate shaft gears 31 gradually decrease. The third switching device is a fifth clutch 29 and is located on the side of the fourth clutch 28 away from the first transmission shaft 21. The fifth clutch 29 includes a fifth sleeve, a fifth gear hub, a seventh gear ring and an eighth gear ring. The fifth sleeve, the seventh gear ring and the eighth gear ring are loosely mounted on the output shaft 24. The fifth gear hub is fixedly mounted on 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 arranged at one end of the output shaft 24 away from the first motor 11 to output power to the outside.

[0071] Embodiment 2

[0072] The structure of this embodiment is substantially the same as that of the first embodiment, wherein the same components are marked with the same reference numerals. Figure 2 The difference between this embodiment and the first embodiment 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] Embodiment 3

[0074] The structure of this embodiment is substantially the same as that of the first embodiment, wherein the same components are marked with 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 passive gear 42 to form a third gear pair. The first passive gear 42 can be used for transmitting power from the second transmission shaft 22 to the first transmission shaft 21, and can also be used as a speed reduction structure for the output of the first motor 11, thereby eliminating the third passive gear 62.

[0075] Embodiment 4

[0076] The structure of this embodiment is substantially the same as that of the third embodiment, wherein the same components are marked with the same reference numerals. Figure 4 The difference between this embodiment and the first embodiment 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] Embodiment 5

[0078] The structure of this embodiment is substantially the same as that of the first embodiment, wherein the same components are marked with the same reference numerals. Figure 5The difference between this embodiment and the fifth embodiment is that two intermediate shafts 23 are provided on opposite sides of the output shaft 24 , and both intermediate shafts 23 can be connected to the output shaft 24 through corresponding shifting gear pairs 3 .

[0079] Embodiment 6

[0080] The structure of this embodiment is substantially the same as that of the fifth embodiment, wherein the same components are marked with the same reference numerals. Figure 6 The difference between this embodiment and the fifth embodiment 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] Embodiment 7

[0082] The structure of this embodiment is substantially the same as that of the fifth embodiment, wherein the same components are marked with the same reference numerals. Figure 7 The difference between this embodiment and the fifth embodiment is that the third driving gear 61 meshes with the first passive gear 42 to form a third gear pair. The first passive gear 42 can be used for the second transmission shaft 22 to transmit power to the first transmission shaft 21, and can also be used as a speed reduction structure for the output of the first motor 11, thereby eliminating the third passive gear 62.

[0083] Embodiment 8

[0084] The structure of this embodiment is substantially the same as that of the seventh embodiment, wherein the same components are marked with the same reference numerals. Figure 8 The difference between this embodiment and the seventh embodiment 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] Embodiment 9

[0086] The structure of this embodiment is substantially the same as that of the fifth embodiment, wherein the same components are marked with the same reference numerals. Fig. 9 The difference between this embodiment and the fifth embodiment is that: the first driving gear 41 and the second driving gear 51 are fixedly mounted on the second transmission shaft 22, the first passive gear 42 is loosely mounted on the first transmission shaft 21, and the second passive gear 52 is loosely mounted 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 sleeve, a second gear hub and a third gear ring. The second sleeve and the third gear ring are loosely mounted 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 passive gear 42. The third clutch 27 includes a third sleeve, a third gear hub and a fourth gear ring. The third sleeve and the fourth gear ring are loosely mounted 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 passive gear 52.

[0087] Embodiment Ten

[0088] This embodiment has substantially the same structure as Embodiment Nine, where the same components are denoted by the same reference numerals. Refer to Fig.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] Embodiment Eleven

[0090] This embodiment has substantially the same structure as Embodiment Nine, where the same components are denoted by the same reference numerals. Refer to Fig.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 also serves as a speed reduction structure for the output of the second motor 12, eliminating the fourth driven gear 72.

[0091] Embodiment Twelve

[0092] This embodiment has substantially the same structure as Embodiment Eleven, where the same components are denoted by the same reference numerals. Refer to Fig.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 speed reduction structure composed of the first motor 11 and the third gear pair and the speed reduction structure composed of the second motor 12 and the fourth gear pair can also be replaced by direct motor connection, or double motors coupled with a parallel shaft speed reduction, or a motor cooperating with a planetary gear set for speed reduction, etc. There is no specific limitation here.

[0094] Next, a vehicle according to an embodiment of the second aspect of the present invention will be described with reference to the accompanying drawings.

[0095] The vehicle according to an embodiment of the second aspect of the present invention includes: a drive system 100.

[0096] The vehicle according to an embodiment of the second aspect of the present invention controls the transmission connection or disconnection between the second transmission shaft 22 and the first transmission shaft 21 and the output shaft 24 through a first switching device. While ensuring the power coupling output of the first motor 11 and the second motor 12, it can ensure that the second motor 12 can drive the output shaft 24 to keep rotating during the gear shifting process to avoid power interruption, thereby avoiding the jerks and the risk of vehicle rollback caused by power interruption during gear shifting, and improving the smoothness and safety of vehicle driving.

[0097] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0098] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

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

Claims

1. A drive system, characterized in that: include: A power unit including a first motor and a second motor; A gearbox, comprising a first transmission shaft, a second transmission shaft, an intermediate shaft, an output shaft, a first switching device, a second switching device and a third switching device, wherein the first transmission shaft is drivingly connected to the motor shaft of the first motor, the second transmission shaft is drivingly connected to the motor shaft of the second motor, the first switching device is used to control the driving connection or disconnection of the second transmission shaft with the first transmission shaft and the output shaft, the second switching device is at least used to control the driving connection or disconnection of the first transmission shaft with the output shaft, the intermediate shaft is drivingly connected to the first transmission shaft, and the intermediate shaft is suitable for driving connection with the output shaft through multiple shift gear pairs, and the third switching device is used to control the connection or disconnection of the output shaft and / or the intermediate shaft with the multiple shift gear pairs.

2. The drive system according to claim 1, characterized in that: The intermediate shaft is provided in plurality and is arranged at intervals along the circumferential direction of the output shaft.

3. The drive system according to claim 1, characterized in that: The second transmission shaft is suitable for being transmission-connected to the first transmission shaft through a first gear pair and for being transmission-connected to the output shaft through a second gear pair, and the first switching device is used to control the transmission connection or disconnection between the first gear pair and the second transmission shaft and / or the first transmission shaft, and is used to control the transmission connection or disconnection between the second gear pair and the second transmission 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 mounted on the second transmission shaft and a first passive gear fixed to the first transmission shaft, the second gear pair includes a second driving gear loosely mounted on the second transmission shaft and a second passive gear fixed to the output shaft, the first switching device includes a first sleeve, a first gear hub, a first gear ring and a second gear ring, the first gear hub is fixed to the second transmission shaft, the first gear ring and the second gear ring are loosely mounted on the second transmission shaft and the first gear ring and the second gear ring are respectively connected to the first passive gear and the second passive gear, the first sleeve is slidable along the axial direction of the second transmission shaft to control the first gear hub to connect or separate with the first gear ring or the second gear ring.

5. The drive system according to claim 4, characterized in that: A third driving gear is disposed on the motor shaft of the first motor, and the third driving gear is meshed with the first passive 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 passive gear loosely mounted on the first transmission shaft, the second gear pair includes a second driving gear fixed to the second transmission shaft and a second passive gear loosely mounted on the output shaft, the first switching device includes a second sleeve, a third 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, the third gear ring is loosely mounted on the first transmission shaft and connected to the first passive gear, the second 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, the fourth gear ring is loosely mounted on the output shaft and connected to the second passive gear, and the third 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: A fourth driving gear is disposed on the motor shaft of the second motor, and the fourth driving gear is meshed with the first driving gear.

8. The drive system according to claim 3, characterized in that: The first transmission shaft is located at one side of the output shaft in the axial direction. In the axial direction of the output shaft, the second gear pair is located at a side of the intermediate shaft away from the first transmission shaft.

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

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

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