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, the gearbox comprises a transmission shaft, an intermediate shaft, an output shaft, a first switching device and a second switching device, the output shaft of the first motor is in transmission connection with the intermediate shaft, and the output shaft of the second motor is in transmission connection with the intermediate shaft; a motor shaft of the second motor is in transmission connection with the transmission shaft, the first switching device is used for controlling transmission connection or disconnection of the transmission shaft, the intermediate shaft and the output shaft, and the intermediate shaft is suitable for being in transmission connection with the output shaft through a plurality of gear shifting gear pairs. The second switching device is used for controlling transmission connection or disconnection between the multiple gear shifting gear pairs and the intermediate shaft and / or the output shaft. According to the driving system, in the gear shifting process, the second motor can drive the output shaft to keep rotating so as to avoid power interruption, so that 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 a first aspect of an embodiment of the present invention, the drive system comprises: a power unit, comprising a first motor and a second motor; a gearbox, comprising a transmission shaft, an intermediate shaft, an output shaft, a first switching device, and a second switching device, wherein the output shaft of the first motor is transmission-connected to the intermediate shaft, and the motor shaft of the second motor is transmission-connected to the transmission shaft, the first switching device is used to control the transmission connection or disconnection between the transmission shaft and the intermediate shaft and the output shaft, the intermediate shaft is suitable for being transmission-connected to the output shaft through a plurality of shift gear pairs, and the second switching device is used to control the transmission connection or disconnection between the plurality of shift gear pairs and the intermediate shaft and / or the output shaft.

[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 transmission shaft, the intermediate shaft and the output shaft, so as to realize the power coupling of the first motor and the second motor at the intermediate shaft, and ensure 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, the transmission shaft is suitable for being transmission-connected to the intermediate shaft via a first gear pair, and is suitable for being transmission-connected to the output shaft 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 transmission shaft and / or the intermediate shaft, and is used to control the transmission connection or disconnection between the second gear pair and the transmission shaft and / or the output shaft.

[0007] According to some embodiments of the present invention, the first gear pair includes a first driving gear provided on the transmission shaft and a first driven gear provided on the intermediate shaft, the motor shaft of the first motor is transmission-connected to the intermediate shaft via a third gear pair, the third gear pair includes a third driving gear fixedly provided on the motor shaft of the first motor and a third driven gear fixedly provided on the intermediate shaft, and the first driven gear and the third driven gear are the same gear.

[0008] According to some embodiments of the present invention, the first gear pair includes a first driving gear provided on the transmission shaft and a first driven gear provided on the intermediate shaft, the shifting gear pair includes an intermediate shaft gear provided on the intermediate shaft and an output shaft gear provided on the output shaft, and the first driven gear and one of the intermediate shaft gears are the same gear.

[0009] According to some embodiments of the present invention, the intermediate shaft is located on the outer peripheral side of the output shaft, in the axial direction of the output shaft, the first motor is located on one side of the output shaft, and the second gear pair is located on the side of the intermediate shaft away from the first motor.

[0010] According to some embodiments of the present invention, the two ends of the intermediate shaft in the axial direction are respectively a first end and a second end, the first end is close to the first motor, and the distance between the first gear pair and the first end is greater than the distance between the first gear pair and the second end.

[0011] According to some embodiments of the present invention, the first gear pair includes a first driving gear loosely mounted on the transmission shaft and a first passive gear fixed to the intermediate shaft, the second gear pair includes a second driving gear loosely mounted on the 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 transmission shaft, the first gear ring and the second gear ring are loosely mounted on the 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 transmission shaft to control the first gear hub to connect or separate with the first gear ring or the second gear ring.

[0012] 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, the second switching device includes a second gear hub, a second sleeve, a third gear ring and a fourth gear ring, the second gear hub is fixed to the output shaft, the third gear ring and the fourth gear ring are loosely mounted on the output shaft and are located on opposite sides of the second gear hub, the third gear ring and the fourth gear ring are respectively connected to one of the output shaft gears, and the second sleeve is slidable along the axial direction of the output shaft to control the connection or separation of the second gear hub and the third gear ring or the fourth gear ring.

[0013] 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.

[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 between the transmission shaft, the intermediate shaft and the output shaft, so that the power coupling of the first motor and the second motor can be achieved at the intermediate shaft, 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 jerking and rolling caused by power interruption during the gear shifting process, and improving the stability and safety of the vehicle's 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] Reference numerals:

[0024] 100. Drive system;

[0025] 10. Power unit; 11. First motor; 12. Second motor;

[0026] 20. Gearbox; 21. Transmission shaft; 22. Intermediate shaft; 23. Output shaft; 24. First switching device; 25. Second switching device; 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; 53. Idle gear; 61. Third driving gear; 62. Third passive gear; 71. Fourth driving gear; 72. Fourth passive gear; 8. Output gear. DETAILED DESCRIPTION

[0027] 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.

[0028] 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.

[0029] 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.

[0030] like Figure 1 As shown, the drive system 100 according to the embodiment of the first aspect 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 transmission shaft 21, an intermediate shaft 22, an output shaft 23, a first switching device 24, and a second switching device 25, the output shaft 23 of the first motor 11 is transmission-connected to the intermediate shaft 22, the motor shaft of the second motor 12 is transmission-connected to the transmission shaft 21, the first switching device 24 is used to control the transmission connection or disconnection of the transmission shaft 21 with the intermediate shaft 22 and the output shaft 23, the intermediate shaft 22 is suitable for being transmission-connected to the output shaft 23 through a plurality of shifting gear pairs 3, and the second switching device 25 is used to control the transmission connection or disconnection of a plurality of shifting gear pairs 3 with the intermediate shaft 22 and / or the output shaft 23.

[0031] That is to say, the first motor 11 is used to drive the intermediate shaft 22 to rotate, and the transmission connection between the intermediate shaft 22 and the output shaft 23 through different shift gear pairs 3 can be realized through the third switching device, so that the intermediate shaft 22 can adjust the power output to the output shaft 23 through multiple shift gear pairs 3 to realize the shifting operation. In addition, the second motor 12 is used to drive the transmission shaft 21 to rotate, and the transmission shaft 21 can be connected to the output shaft 23 through the first switching device 24. The power output by the second motor 12 can be directly transmitted to the output shaft 23 through the transmission shaft 21. For example, during the climbing process, the transmission connection between the transmission shaft 21 and the output shaft 23 can be maintained to ensure that the second motor 12 can drive the output shaft 23 to keep rotating during the shifting process to avoid power interruption, thereby avoiding the setback and the risk of slipping caused by power interruption during the shifting process, and improving the stability and safety of the vehicle.

[0032] Secondly, the transmission shaft 21 can be connected to the intermediate shaft 22 through the first switching device 24, so that the power coupling of the first motor 11 and the second motor 12 can be realized at the intermediate shaft 22, thereby improving the driving force of the drive system 100. At the same time, gear shifting operations can be performed through the intermediate shaft 22, the second switching device 25 and multiple shifting gear pairs 3, that is, the first motor 11 and the second motor 12 can share multiple gears on the output shaft 23 to achieve power output of different gears.

[0033] According to the drive system 100 of the first aspect of the present invention, the first switching device 24 controls the transmission connection or disconnection between the transmission shaft 21 and the intermediate shaft 22 and the output shaft 23, so that the power coupling of the first motor 11 and the second motor 12 can be achieved at the intermediate shaft 22, while ensuring that the second motor 12 can drive the output shaft 23 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.

[0034] According to some embodiments of the present invention, the transmission shaft 21 is suitable for being transmission-connected to the intermediate shaft 22 via a first gear pair, and is suitable for being transmission-connected to the output shaft 23 via a second gear pair, and the first switching device 24 is used to control the transmission connection or disconnection between the first gear pair and the transmission shaft 21 and / or the intermediate shaft 22, and is used to control the transmission connection or disconnection between the second gear pair and the transmission shaft 21 and / or the output shaft 23.

[0035] Among them, the first gear pair can be connected to the intermediate shaft 22 and can be separated from the transmission shaft 21, the second gear pair is connected to the output shaft 23 and can be separated from the transmission shaft 21, and the first switching device 24 is used to control the connection or separation of the first gear pair and the second gear pair with the transmission shaft 21. For example, the first switching device 24 can control the transmission shaft 21 to be connected to the first gear pair in transmission connection, realize the power coupling of the second motor 12 and the first motor 11 and switch the output gear through the intermediate shaft 22 and the shifting gear pair 3. The first switching device 24 can also control the transmission shaft 21 to be connected to the second gear pair in transmission connection, so that the second motor 12 can directly output power to the output shaft 23 to avoid power interruption during gear shifting; it can also be that the first gear pair The wheel pair is detachably connected to the intermediate shaft 22 and is connected to the transmission shaft 21, the second gear pair is detachably connected to the output shaft 23 and is connected to the transmission shaft 21, the first switching device 24 is used to control the connection or separation of the first gear pair and the intermediate shaft 22, and is used to control the connection or separation of the second gear pair and the output shaft 23. For example, the first switching device 24 can control the intermediate shaft 22 to be connected to the first gear pair in a transmission connection, thereby realizing the power coupling between the second motor 12 and the first motor 11 and switching the output gear through the intermediate shaft 22 and the shifting gear pair 3. The first switching device 24 can also control the transmission connection between the transmission shaft 21 and the second gear pair, so that the second motor 12 can directly output power to the output shaft 23 to avoid power interruption during gear shifting.

[0036] Of course, the first gear pair may be connected to the intermediate shaft 22 and detachably connected to the transmission shaft 21, the second gear pair may be detachably connected to the output shaft 23 and connected to the transmission shaft 21, and the first switching device 24 may be used to control the transmission connection or disconnection between the first gear pair and the transmission shaft 21, and control the transmission connection or disconnection between the second gear pair and the output shaft 23; the first gear pair may be detachably connected to the intermediate shaft 22 and connected to the transmission shaft 21, the second gear pair may be connected to the output shaft 23 and detachably connected to the transmission shaft 21, and the first switching device 24 may be used to control the transmission connection or disconnection between the first gear pair and the intermediate shaft 22, and control the transmission connection or disconnection between the second gear pair and the transmission shaft 21, and so on, which will not be described one by one here.

[0037] According to some embodiments of the present invention, Figure 4 and Figure 5As shown, the first gear pair includes a first driving gear 41 provided on the transmission shaft 21 and a first driven gear 42 provided on the intermediate shaft 22, the motor shaft of the first motor 11 is connected to the intermediate shaft 22 through the third gear pair, 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 intermediate shaft 22, and the first driven gear 42 and the third driven gear 62 are the same gear. In other words, the first gear pair and the third gear pair share the same gear to transmit power to the intermediate shaft 22. Thus, the number of gears on the intermediate shaft 22 can be reduced, so as to reduce the cost of the gearbox 20 and reduce the volume of the gearbox 20, and at the same time, it is convenient to arrange the gears on the intermediate shaft 22, so as to reduce the difficulty of assembling the gearbox 20.

[0038] According to some embodiments of the present invention, Figure 2 and Figure 3 As shown, the first gear pair includes a first driving gear 41 provided on the transmission shaft 21 and a first driven gear 42 provided on the intermediate shaft 22, the shift gear pair 3 includes an intermediate shaft gear 31 provided on the intermediate shaft 22 and an output shaft gear 32 provided on the output shaft 23, and the first driven gear 42 is the same gear as one of the intermediate shaft gears 31. That is to say, the first driving gear 41 is meshed with one of the intermediate shafts 22, thereby reducing the number of gears on the intermediate shaft 22, thereby reducing the cost of the gearbox 20 and reducing the volume of the gearbox 20, and at the same time facilitating the arrangement of the gears on the intermediate shaft 22, thereby reducing the difficulty of assembling the gearbox 20.

[0039] According to some embodiments of the present invention, the intermediate shaft 22 is located on the outer peripheral side of the output shaft 23, the first motor 11 is located on one side of the output shaft 23 in the axial direction of the output shaft 23, and the second gear pair is located on the side of the intermediate shaft 22 away from the first motor 11. Therefore, by arranging the second gear pair on the side of the intermediate shaft 22 away from the first motor 11, it is possible to avoid the increase in the length of the intermediate shaft 22 caused by the distance between the two gears on the intermediate shaft 22 occupied by the second gear pair, that is, the length of the intermediate shaft 22 can be shortened to reduce costs and reduce the installation space occupied by the gearbox 20.

[0040] According to some embodiments of the present invention, the two ends of the intermediate shaft 22 in the axial direction are respectively the first end and the second end, the first end is close to the first motor 11, and the distance between the first gear pair and the first end is greater than the distance between the first gear pair and the second end. In other words, the first gear pair is arranged closer to the second end, wherein, since the second gear pair is located on the side of the intermediate shaft 22 away from the first motor 11, that is, the second gear pair is located on the side of the second end, by arranging the first gear pair closer to the second end relative to the first end, the distance between the first gear pair and the second gear pair in the axial direction can be shortened. It can be understood that the closer the distance between the first gear pair and the second gear pair is, the longer the length of the installation position that needs to be provided in the axial direction of the transmission shaft 21 is, that is, the more transmission shafts 21 are. As a result, the length of the transmission shaft 21 can be shortened to reduce costs and reduce the installation space occupied by the gearbox 20.

[0041] According to some embodiments of the present invention, the first gear pair includes a first driving gear 41 that is loosely mounted on the transmission shaft 21 and a first passive gear 42 that is fixed to the intermediate shaft 22, the second gear pair includes a second driving gear 51 that is loosely mounted on the transmission shaft 21 and a second passive gear 52 that is fixed to the output shaft 23, and the first switching device 24 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 transmission shaft 21, the first gear ring and the second gear ring are loosely mounted on the transmission shaft 21, 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, and the first sleeve can slide along the axial direction of the transmission shaft 21 to control the first gear hub to connect or separate with the first gear ring or the second gear ring.

[0042] Among them, 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, and the transmission shaft 21 is transmission-connected to the intermediate shaft 22 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 transmission shaft 21 is disconnected from the output shaft 23; 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, and the transmission shaft 21 is transmission-connected to the output shaft 23 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 transmission shaft 21 is disconnected from the intermediate shaft 22.

[0043] Therefore, the transmission connection or disconnection between the transmission shaft 21 and the intermediate shaft 22 and the output shaft 23 can be achieved through the sliding of the first sleeve, which can greatly simplify the structure of the first switching device 24. For example, it can be achieved with only one clutch structure as shown in the figure, which can reduce the cost of the drive system 100 and reduce the size of the drive system 100.

[0044] 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.

[0045] According to some embodiments of the present invention, an idler gear 53 is provided between the second driving gear 51 and the second passive gear 52. That is, the second driving gear 51 is meshed with the idler gear 53, and the idler gear 53 is meshed with the second passive gear 52, and the direction of the second passive gear 52 can be changed well through the idler gear 53, so that the first motor 11 and the second motor 12 can output power through the intermediate shaft 22, while the step of the second motor 12 needing to rotate in the opposite direction during the gear shifting process can be omitted, so as to ensure the stable operation of the gearbox 20.

[0046] According to some embodiments of the present invention, the shift gear pair 3 includes an intermediate shaft gear 31 fixed to the intermediate shaft 22 and an output shaft gear 32 loosely mounted on the output shaft 23, the second switching device 25 includes a second gear hub, a second sleeve, a third gear ring and a fourth gear ring, the second gear hub is fixed to the output shaft 23, the third gear ring and the fourth gear ring are loosely mounted on the output shaft 23 and are located on opposite sides of the second gear hub, the third gear ring and the fourth gear ring are respectively connected to one of the output shaft gears 32, and the second sleeve can slide along the axial direction of the output shaft 23 to control the connection or separation of the second gear hub and the third gear ring or the fourth gear ring.

[0047] Among them, when the second sleeve is connected with the second gear hub and the third gear ring, the intermediate shaft 22 drives the output shaft 23 to rotate through the corresponding intermediate shaft gear 3131, the output shaft gear 32 connected with the third gear ring, the third gear ring, the second sleeve and the second gear hub to realize the transmission connection between the intermediate shaft 22 and the output shaft 23. At this time, the gearbox 20 is in the gear position corresponding to the shift gear pair 3 connected with the third gear ring, and the second sleeve is disconnected from the fourth gear ring; when the second sleeve is connected with the second gear and the fourth gear ring, the intermediate shaft 22 drives the output shaft 23 to rotate through the corresponding intermediate shaft gear 31, the output shaft gear 32 connected with the fourth gear ring, the fourth gear ring, the second sleeve and the second gear hub to realize the transmission connection between the intermediate shaft 22 and the output shaft 23. At this time, the gearbox 20 is in the gear position corresponding to the shift gear pair 3 connected with the fourth gear ring, and the second sleeve is disconnected from the fourth gear ring.

[0048] Therefore, the switching of two gears can be realized by sliding the second sliding sleeve, which can simplify the structure of the second switching device 25, such as only one clutch structure is needed, which can reduce the cost and volume of the drive system 100. In addition, at the same time, the second sliding sleeve can only be connected to one of the third gear ring and the fourth 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 gearbox 20.

[0049] It should be noted that only one embodiment is described here to facilitate understanding that switching between two gears can be achieved through one clutch. The second switching device 25 can also include two clutches, which are respectively used to control two different gears, and so on. No specific limitation is made here.

[0050] In a specific example, a plurality of second switching devices 25 are arranged at intervals along the axial direction of the output shaft 23 to increase the number of gear positions of the gearbox 20 .

[0051] According to some embodiments of the present invention, the intermediate shaft 22 is provided with a plurality of intermediate shafts 22 arranged at intervals along the circumference of the output shaft 23. That is, the first motor 11 and the transmission shaft 21 can be transmission-connected with the plurality of intermediate shafts 22, and each intermediate shaft 22 can be transmission-connected with the output shaft 23 through the corresponding plurality of shifting gear pairs 3, so that the first motor 11 and the second motor 12 can simultaneously output power to the output shaft 23 through the plurality of intermediate shafts 22 and the plurality of shifting gear pairs 3 of the corresponding gear positions, and the transmission structure has high stability and reliability, which can well improve the stability and reliability of the power output of the first motor 11 and the second motor 12 to the output shaft 23.

[0052] In a specific example, the intermediate shaft 22 is arranged parallel to the output shaft 23, the first motor 11 is located on one side of the axial direction of the output shaft 23, part of the intermediate shaft 22 is located on the outer peripheral side of the output shaft 23 so as to be connected to the output shaft 23 through the shifting gear pair 3, and the other part is located on the outer peripheral side of the motor shaft of the first motor 11 so as to be connected to the motor shaft of the first motor 11 through the third gear pair.

[0053] According to some embodiments of the present invention, two intermediate shafts 22 are symmetrically distributed on opposite sides of the output shaft 23. Thus, the two intermediate shafts 22 can evenly transmit power to the output shaft 23 from symmetrical positions on both sides of the output shaft 23, which can improve the stability of the power transmission from the two intermediate shafts 22 to the output shaft 23. In addition, the layout of the two intermediate shafts 22 is more regular, and the distance between the two intermediate shafts 22 can be increased, so as to reduce the difficulty of assembling the intermediate shafts 22 and the corresponding shifting gear pair 3, and reduce the risk of interference.

[0054] Reference below Figure 1-Figure 5The 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.

[0055] Embodiment 1

[0056] 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 transmission shaft 21, an intermediate shaft 22, an output shaft 23, a first switching device 24, a second switching device 25, a plurality of shift gear pairs 3, a first gear pair, a second gear pair, a third gear pair, a fourth gear pair and an output gear 8.

[0057] Specifically, the first gear pair includes a first driving gear 41 loosely mounted on the transmission shaft 21 and a first passive gear 42 fixedly mounted on the intermediate shaft 22, the second gear pair includes a second driving gear 51 loosely mounted on the transmission shaft 21 and a second passive gear 52 fixedly mounted on the output shaft 23, the first switching device 24 includes a first sleeve, a first gear hub, a first gear ring and a second gear ring, the first gear hub being fixedly mounted on the transmission shaft 21, the first gear ring and the second gear ring being loosely mounted on the transmission shaft 21 and being located on opposite sides of the first gear hub, the first gear ring being connected to the first driving gear 41, the second gear ring being connected to the second driving gear 51, and the first sleeve being slidable along the axial direction of the transmission shaft 21 to be connected to the first gear ring or the second gear ring.

[0058] The first motor 11 and the second motor 12 are located on the same side of the output shaft 23 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 intermediate shaft 22. 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 transmission shaft 21. 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 first driving gear 41 is located between the fourth driven gear 72 and the first clutch. The first driven gear 42 is located on the side of the third driven gear 62 away from the first motor 11.

[0059] A plurality of gear pairs are arranged on a side of the third driven gear 62 away from the first motor 11. The gear pair includes an intermediate shaft gear 31 fixed on the intermediate shaft 22 and an output shaft gear 32 loosely sleeved on the output shaft 23. The intermediate shaft gear 31 closest to the third driven gear 62 in the plurality of gear pairs constitutes a first driven gear 42. The diameters of the intermediate shaft gears 31 of the plurality of gear pairs are different. In the direction away from the third driven gear 62, the diameters of the plurality of intermediate shaft gears 31 gradually decrease. The second switching device 25 is provided with two and includes a second sleeve, a second gear hub, a third gear ring and a fourth gear ring. The second sleeve, the third gear ring and the fourth gear ring are loosely sleeved on the output shaft 23. The second gear hub is fixed on the output shaft 23 and is located between the third gear ring and the fourth gear ring. The second driven gear 52 is located between the two second switching devices 25. The third gear ring and the fourth gear ring are respectively connected to an output shaft gear 32. The output gear 8 is provided at one end of the output shaft 23 away from the first motor 11 to output power to the outside.

[0060] Embodiment 2

[0061] 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 22 away from the first motor 11 , and the second driven gear 52 is located between the second switching device 25 close to the output gear 8 and the output gear 8 .

[0062] Embodiment 3

[0063] The structure of this embodiment is substantially the same as that of the second 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 first driving gear 41 meshes with the second intermediate shaft gear 31 in the direction from the second end to the first end, thereby shortening the length of the intermediate shaft 22 and the length of the transmission shaft 21.

[0064] Embodiment 4

[0065] 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 4 The difference between this embodiment and the first embodiment is that the first driving gear 41 and the third driven gear 62 are meshed to form a first gear pair.

[0066] Embodiment 5

[0067] 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 the second driven gear 52 is located on the side of the intermediate shaft 22 away from the first motor 11 , and the second driven gear 52 is located between the second switching device 25 close to the output gear 8 and the output gear 8 .

[0068] It should be noted that the reduction structure formed by the first motor 11 and the third gear pair and the reduction structure formed by the second motor 12 and the fourth gear pair can also be replaced by direct motor connection or dual motor and parallel shaft reduction coupling or motor and planetary gear combination reduction, etc., and no specific restrictions are made here.

[0069] A vehicle according to an embodiment of a second aspect of the present invention will be described below with reference to the accompanying drawings.

[0070] A vehicle according to an embodiment of the second aspect of the present invention includes: a drive system 100 .

[0071] According to the vehicle of the second aspect of the embodiment of the present invention, the first switching device 24 controls the transmission connection or disconnection between the transmission shaft 21 and the intermediate shaft 22 and the output shaft 23, so that the power coupling of the first motor 11 and the second motor 12 can be achieved at the intermediate shaft 22, while ensuring that the second motor 12 can drive the output shaft 23 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.

[0072] 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.

[0073] 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.

[0074] 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 transmission shaft, an intermediate shaft, an output shaft, a first switching device, and a second switching device, wherein the output shaft of the first motor is transmission-connected to the intermediate shaft, the motor shaft of the second motor is transmission-connected to the transmission shaft, the first switching device is used to control the transmission connection or disconnection between the transmission shaft and the intermediate shaft and the output shaft, the intermediate shaft is suitable for transmission connection with the output shaft through a plurality of shifting gear pairs, and the second switching device is used to control the transmission connection or disconnection between the plurality of shifting gear pairs and the intermediate shaft and / or the output shaft.

2. The drive system according to claim 1, characterized in that: The transmission shaft is suitable for being connected to the intermediate shaft through a first gear pair, and is suitable for being connected to the output shaft through a second gear pair. The first switching device is used to control the transmission connection or disconnection between the first gear pair and the transmission shaft and / or the intermediate shaft, and is used to control the transmission connection or disconnection between the second gear pair and the transmission shaft and / or the output shaft.

3. The drive system according to claim 2, characterized in that: The first gear pair includes a first driving gear provided on the transmission shaft and a first driven gear provided on the intermediate shaft. The motor shaft of the first motor is transmission-connected to the intermediate shaft via a third gear pair. The third gear pair includes a third driving gear fixedly provided on the motor shaft of the first motor and a third driven gear fixedly provided on the intermediate shaft. The first driven gear and the third driven gear are the same gear.

4. The drive system according to claim 2, characterized in that: The first gear pair includes a first driving gear provided on the transmission shaft and a first driven gear provided on the intermediate shaft, the shifting gear pair includes an intermediate shaft gear provided on the intermediate shaft and an output shaft gear provided on the output shaft, and the first driven gear and one of the intermediate shaft gears are the same gear.

5. The drive system according to claim 2, characterized in that: The intermediate shaft is located on the outer peripheral side of the output shaft. In the axial direction of the output shaft, the first motor is located on one side of the output shaft. The second gear pair is located on a side of the intermediate shaft away from the first motor.

6. The drive system according to claim 5, characterized in that: The two ends of the intermediate shaft in the axial direction are respectively a first end and a second end, the first end is close to the first motor, and the distance between the first gear pair and the first end is greater than the distance between the first gear pair and the second end.

7. The drive system according to claim 2, characterized in that: The first gear pair includes a first driving gear loosely mounted on the transmission shaft and a first passive gear fixed to the intermediate shaft, the second gear pair includes a second driving gear loosely mounted on the 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 transmission shaft, the first gear ring and the second gear ring are loosely mounted on the 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 transmission shaft to control the first gear hub to connect or separate with the first gear ring or the second gear ring.

8. 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 mounted on the output shaft. The second switching device includes a second gear hub, a second sleeve, a third gear ring and a fourth gear ring. The second gear hub is fixed to the output shaft. The third gear ring and the fourth gear ring are loosely mounted on the output shaft and are located on opposite sides of the second gear hub. The third gear ring and the fourth gear ring are respectively connected to one of the output shaft gears. The second sleeve can slide along the axial direction of the output shaft to control the connection or separation of the second gear hub and the third gear ring or the fourth gear ring.

9. 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.

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

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