Gearbox assembly and vehicle

Abstract

The embodiment of the invention provides a gearbox assembly and a vehicle. The gearbox assembly comprises two groups of stator assemblies, two groups of rotor assemblies, a speed reducing mechanism and a bearing mechanism, the two stator assemblies and the two rotor assemblies are arranged at the two opposite ends of the gearbox assembly respectively, and one end of the gearbox assembly is fixedly connected with an engine. The speed reducing mechanism and the bearing mechanism are arranged between the two ends. One rotor assembly is used for outputting torque; the speed reducing mechanism is in transmission connection with the rotor assembly, and the bearing mechanism is used for bearing the speed reducing mechanism; and the output end of the gearbox assembly is in transmission connection with the speed reducing mechanism. One end, close to the engine, of the other rotor assembly is fixedly connected with a crankshaft of the engine; a cavity is formed in the end, away from the engine, of the rotor assembly and used for containing the speed reducing mechanism and / or the bearing mechanism. The gearbox assembly can be applied to new energy or intelligent automobiles, the utilization rate of the internal space of the gearbox assembly can be increased, and the size of the gearbox assembly can be reduced.

Description

Technical Field

[0001] The present application relates to the field of new energy vehicles, and more specifically, to a gearbox assembly and a vehicle. Background Art

[0002] With the development of vehicle technology, new energy vehicles such as hybrid vehicles and electric vehicles have gradually become the main direction of vehicle development. Compared with traditional fuel vehicles, the layout space of the gearbox is more limited for new energy vehicles. In particular, for hybrid vehicles, their powertrain includes not only the motor but also the engine, which greatly limits the layout space of the gearbox.

[0003] Therefore, how to reduce the space occupied by the gearbox in the powertrain becomes a problem that needs to be solved. Summary of the invention

[0004] The present application provides a gearbox assembly and a vehicle, which can improve the utilization rate of the internal space of the gearbox assembly and reduce the size of the gearbox assembly.

[0005] In a first aspect, a gearbox assembly (100) is provided. The gearbox assembly (100) comprises a first stator assembly (110), a first rotor assembly (120), a second stator assembly (130), a second rotor assembly (140), a bearing mechanism (150) and a speed reduction mechanism (200). The gearbox assembly (100) is used to be fixedly connected to the engine at a first end; the first rotor assembly (120) is arranged in a first accommodation space of the first stator assembly (110) and is arranged at the first end together with the first stator assembly (110); the second rotor assembly (140) is arranged in a second accommodation space of the second stator assembly (130) and is arranged at the second end of the gearbox assembly (100) together with the second stator assembly (130); the bearing mechanism (150) and the speed reduction mechanism (200) are arranged between the first end and the second end; the first end and the second end are arranged relative to each other. The second rotor assembly (140) is used to output torque, the speed reduction mechanism (200) is transmission-connected to the second rotor assembly (140), the bearing mechanism (150) is used to bear the speed reduction mechanism (200), and the output end of the gearbox assembly (100) is transmission-connected to the speed reduction mechanism (200). The first rotor assembly (120) includes a third end and a fourth end that are arranged opposite to each other, the first rotor assembly (120) is used to be fixedly connected to the crankshaft of the engine at the third end, and the fourth end is provided with a first cavity, and the first cavity is used to accommodate the speed reduction mechanism (200) and / or the bearing mechanism (150).

[0006] In the present application, the first rotor assembly and the second rotor assembly are respectively arranged at the first end and the second end of the gearbox assembly, and the speed reduction mechanism and the bearing mechanism are arranged between the first end and the second end. On the one hand, since the first rotor assembly and the second rotor assembly are arranged side by side along the first direction (i.e., the axial direction of the rotor assembly), the gearbox assembly can have a smaller size in the direction perpendicular to the first direction; on the other hand, since the speed reduction mechanism 200 and the bearing mechanism 150 are arranged between the first end and the second end, the two can play the effect of isolating the two rotor assemblies, and can avoid mutual interference between the two rotor assemblies when rotating without setting up components such as partitions and shells, so that the gearbox assembly can have a smaller size in the first direction.

[0007] Moreover, since the first rotor assembly is fixedly connected to the crankshaft of the engine through the third end, the rotor assembly can be directly connected to the crankshaft of the engine, and there is no need to set a flywheel, a torsional damper, etc. between the rotor assembly and the crankshaft. For the power assembly composed of the gearbox assembly 100 and the engine, directly connecting the rotor assembly to the crankshaft of the engine can further reduce the size of the power assembly in the first direction on the one hand, and can also significantly reduce the cost and weight of the power assembly on the other hand.

[0008] In addition, since the speed reduction mechanism and the bearing mechanism are arranged between the first end and the second end, and the first rotor assembly is provided with a cavity at the end thereof away from the engine, for the gearbox assembly, when arranging the speed reduction mechanism and / or the bearing mechanism, not only the space between the two stator assemblies but also the cavity arranged in the first rotor assembly can be utilized. In this way, the size of the gearbox assembly in the first direction can be further reduced, and the space required for arranging the power assembly can be further reduced, which is also conducive to reducing the cost and weight of the power assembly.

[0009] In some possible implementations, the speed reduction mechanism (200) may include a planetary gear mechanism (220) and a first transmission member (214). The planetary gear mechanism (220) may include a sun gear (221), a ring gear (222), and an intermediate element (223) for transmission connection between the sun gear (221) and the ring gear (222), and the ring gear (222) may be fixedly connected to the support mechanism (150). The first transmission member (214) may be used for transmission connection between the sun gear (221) and the second rotor assembly (140), and one end of the first transmission member (214) close to the first rotor assembly (120) may be arranged in the first cavity.

[0010] In the present application, a planetary gear mechanism is provided in the reduction mechanism. On the one hand, compared with other gear reduction mechanisms, the planetary gear mechanism has a compact structure, a small size, and a light weight, which is conducive to making full use of the cavity of the first rotor assembly to set the reduction mechanism. On the other hand, the bearing mechanism corresponding to the planetary gear reduction mechanism is relatively simple, which is conducive to making full use of the cavity of the first rotor assembly to set the bearing mechanism. Therefore, by reasonably setting the form adopted by the reduction mechanism, the space utilization rate of the system can be improved, thereby further reducing the size of the gearbox assembly in the first direction. In addition, by setting part of the first transmission member in the cavity of the first rotor assembly, the axial spacing between the two rotor assemblies can be shortened while the size of the first transmission member remains unchanged, which is conducive to further reducing the size of the gearbox assembly in the first direction.

[0011] In some possible implementations, the first transmission member (214) may include a transmission shaft; the intermediate element (223) may include a planetary gear (224) and a planetary carrier (225). The bearing mechanism (150) may include a first bearing (242) for bearing the transmission shaft and a first bearing chamber (152) for arranging the first bearing (242); the first bearing chamber (152) may be arranged in the first cavity. And / or, the bearing mechanism (150) may include a second bearing (244) for bearing the planetary carrier (225) and a second bearing chamber (154) for arranging the second bearing (244); the second bearing chamber (154) may be arranged in the first cavity.

[0012] In the present application, by arranging the bearing for carrying the reduction mechanism and the corresponding bearing chamber in the cavity of the first rotor assembly, the size of the gearbox assembly in the first direction can be greatly reduced.

[0013] In some possible implementations, the planet carrier (225) may include a shaft body portion and an outer ring portion. The outer ring portion may be used to set the planetary gear (224); the shaft body portion may be provided with a first through hole, and the transmission shaft is arranged through the first through hole; the first through hole may be used to set a third bearing (243), and the third bearing (243) is used to carry the transmission shaft.

[0014] When the size of the first through hole of the planet carrier is too small to be sufficient to set the bearing, the planet carrier and the bearing for carrying the transmission shaft are often required to be arranged side by side at the end close to the first rotor assembly to avoid the planet carrier, resulting in a larger size of the gearbox assembly in the first direction. In the present application, by setting the bearing for carrying the transmission shaft in the through hole of the planet carrier, it is not necessary to arrange the planet carrier and the bearing for carrying the transmission shaft side by side along the first direction at the end close to the first rotor assembly, which can significantly reduce the size of the gearbox assembly in the first direction.

[0015] In some possible implementations, part or all of the sun gear (221) may be disposed in the first cavity; part or all of the intermediate element (223) may be disposed in the first cavity; and / or part or all of the ring gear (222) may be disposed in the first cavity.

[0016] In the present application, by arranging the components of the planetary gear mechanism in the cavity of the first rotor assembly, the size of the gearbox assembly in the first direction can be significantly reduced.

[0017] In some possible implementations, the speed reduction mechanism (200) may include a first gear (234), a second gear (236) meshing with the first gear (234), a second transmission member (232) for transmission connection between the second rotor assembly (140) and the first gear (234), and a third transmission member (238) transmission connection with the second gear (236). The first gear (234) may be arranged in parallel with the second gear (236); and an end of the second transmission member (232) and / or the third transmission member (238) close to the first rotor assembly (120) may be arranged in the first cavity.

[0018] Exemplarily, the first gear, the second gear, the first transmission member and the second transmission member may constitute a parallel shaft reduction mechanism.

[0019] In the present application, by providing a parallel shaft reduction mechanism, it is advantageous to use multiple gear sets with smaller reduction ratios to achieve a larger reduction ratio for the entire gearbox assembly.

[0020] In some possible implementations, the speed reduction mechanism (200) may further include a third gear (212), a fourth gear (262) meshed with the third gear (212), and a differential mechanism (270) drivingly connected to the fourth gear (262). The third gear (212) may be drivingly connected to the intermediate element (223) or the third transmission member (238). The output end of the gearbox assembly (100) includes a first output end and a second output end, and the first output end and the second output end are respectively drivingly connected to two opposite ends of the differential mechanism (270).

[0021] In the present application, coupling the differential mechanism to the gearbox assembly is beneficial to improving the integration of the gearbox assembly. In particular, for a scenario where the engine is front mounted and the front wheels are driving wheels, integrating the differential mechanism into the gearbox can further save the longitudinal space required when the torque is output from the powertrain to the front wheels.

[0022] In some possible implementations, the first rotor assembly (120) may include a rotor support (121) and a rotor core (122). The rotor core (122) may be provided with a second through hole; the rotor support (121) may be provided through the second through hole and connected to the rotor core (122); and the first cavity may be provided in the rotor support (121).

[0023] In some possible implementations, a first flange surface may be provided at one end of the crankshaft close to the gearbox assembly (100); the first rotor assembly (120) may include a second flange surface (123) provided at a third end, and the second flange surface (123) may be used to be fixedly connected to the first flange surface via a fastener.

[0024] In the present application, by providing a flange surface at the end of the first rotor assembly, the flange surface can be fixedly connected to the flange surface of the crankshaft, and there is no need to provide components such as a rotating shaft for connecting the rotor assembly and the crankshaft, which is beneficial to simplifying the connection method between the rotor assembly and the crankshaft and can save the size of the powertrain including the hybrid box assembly and the engine.

[0025] In some possible implementations, the gearbox assembly (100) may further include a housing (160). The first stator assembly (110), the first rotor assembly (120), the second stator assembly (130), the second rotor assembly (140), the bearing mechanism (150) and the speed reduction mechanism (200) are arranged in the internal space of the housing (160), and the internal space of the housing (160) may be provided with a coolant.

[0026] In the present application, coolant is used in the housing to cool the stator assembly, rotor assembly, reduction mechanism and other mechanisms, which is beneficial for keeping each component at a suitable operating temperature and can avoid abnormal operation caused by inappropriate operating temperature.

[0027] In some possible implementations, the reduction ratio of the reduction mechanism (200) is greater than or equal to 8 and less than or equal to 11.

[0028] In some possible implementations, an axial gap between the first stator assembly (110) and the second stator assembly (130) is less than or equal to 120 millimeters.

[0029] In the present application, the axial gap between the two stator assemblies is less than or equal to 120 mm, which is beneficial to ensure that the gearbox assembly has a smaller size in the first direction.

[0030] In some possible implementations, a diameter of the first cavity is less than or equal to 200 mm.

[0031] In the present application, the diameter of the first cavity is less than or equal to 200 mm, which is beneficial to ensure that the gearbox assembly has a smaller size in other directions of the vehicle perpendicular to the first direction.

[0032] In a second aspect, a power assembly is provided. The power assembly may include the transmission assembly in the first aspect and any possible implementation thereof. The power assembly may also include an engine.

[0033] In a third aspect, a vehicle is provided. The vehicle may include the transmission assembly of the first aspect and any possible implementation thereof, or may include the powertrain of the second aspect and any possible implementation thereof. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 is a structural schematic diagram of a gearbox assembly 100 provided in an embodiment of the present application;

[0035] Figure 2 is a schematic diagram of the relative position relationship between the stator assembly and the rotor assembly provided in an embodiment of the present application;

[0036] Figure 3 is a structural schematic diagram of a vehicle provided in an embodiment of the present application;

[0037] Figure 4 is a structural schematic diagram of a speed reduction mechanism 200 provided in an embodiment of the present application;

[0038] Figure 5 is another structural schematic diagram of the speed reduction mechanism 200 provided in an embodiment of the present application;

[0039] Figure 6 is a structural schematic diagram of a carrying mechanism 150 provided in an embodiment of the present application;

[0040] Figure 7 is another structural schematic diagram of the carrying mechanism 150 provided in an embodiment of the present application;

[0041] Figure 8 It is a structural schematic diagram of the rotor assembly 120 provided in an embodiment of the present application. DETAILED DESCRIPTION

[0042] The technical solution in this application will be described below in conjunction with the accompanying drawings.

[0043] For example, Figure 1 It is a structural schematic diagram of a gearbox assembly 100 provided in an embodiment of the present application.

[0044] like Figure 1 As shown, the engine may include a crankshaft and a cylinder block; the engine may also include components such as a piston and a connecting rod ( Figure 1 (not shown). Under the action of the gas, the piston and connecting rod of the engine can drive the crankshaft to rotate.

[0045] The gearbox assembly 100 can be fixedly connected to the engine at one end. For example, the gearbox assembly 100 can be fixedly connected to the cylinder block of the engine through a fastener. For another example, the joint between the gearbox assembly 100 and the engine can be sealed with a sealing ring.

[0046] For the gearbox assembly 100, the end for fixed connection with the engine can be referred to as the first end of the gearbox assembly 100; the gearbox assembly 100 can also have a second end arranged opposite to the first end. Figure 1 As shown, for the gearbox assembly 100, the first end and the second end may be two ends arranged opposite to each other in direction 1. For another example, direction 1 may be the lateral direction of the vehicle, and direction 2 may be the longitudinal direction of the vehicle; in this case, the engine may be arranged in a transverse manner on the vehicle. For another example, in some possible implementations, direction 1 may also be the longitudinal direction of the vehicle. The specific arrangement of the engine is not limited in the present embodiment.

[0047] The gearbox assembly 100 may include stator assemblies 110 and 130, rotor assemblies 120 and 140, a bearing mechanism 150, and a speed reduction mechanism 200. The stator assembly 110 and the rotor assembly 120 may be disposed at a first end of the gearbox assembly 100; the stator assembly 130 and the rotor assembly 140 may be disposed at a second end of the gearbox assembly 100. For example, the stator assemblies 110 and 130 may be disposed side by side along direction 1; the rotor assemblies 120 and 140 may be disposed side by side along direction 1, as shown in FIG. Figure 1 As another example, the rotor assemblies 120 and 140 may be coaxially arranged.

[0048] The stator assembly 110 and the rotor assembly 120 can match each other. For example, the stator assembly 110 may include a plurality of magnetic tiles, which may be combined to form a receiving space #1, and the receiving space #1 may be used to receive the rotor assembly 120. Figure 2 As shown in (a) in FIG. 1 , for example, in some possible implementations, the stator assembly 110 may include a winding, and the accommodating space #1 may be surrounded by the winding.

[0049] Similarly, the stator assembly 130 and the rotor assembly 140 can match each other. For example, the stator assembly 130 may have a receiving space #2 at the axis thereof, and the receiving space #2 may be used to receive the rotor assembly 140. Figure 2 As shown in (b) in .

[0050] For example, in the gearbox assembly 100, the stator assembly 110 and the rotor assembly 120 can function as a generator. For example, when the crankshaft drives the rotor assembly 120 to rotate, the rotor assembly 120 will generate electrical energy under the action of the stator assembly 110. The electrical energy can be stored in an energy storage device such as a power battery, and / or can be used to drive the rotor assembly 140 to rotate.

[0051] Exemplarily, the rotor assembly 140 can be used to output torque. For example, when the windings in the rotor assembly are energized, the rotor assembly 140 can rotate under the action of the stator assembly 130, outputting positive torque to the outside world to drive the vehicle forward. For another example, in some possible implementations, the torque can also be negative torque; negative torque can indicate that the torque is used to provide braking force for the vehicle. At this time, energy recovery can be performed through the rotor assembly 140.

[0052] For example, the speed reduction mechanism 200 may be a speed reduction mechanism such as a gear speed reduction mechanism, a belt speed reduction mechanism, or a combination of various speed reduction mechanisms. For example, the speed reduction mechanism 200 may include one or more of a planetary gear mechanism, a parallel shaft speed reduction mechanism, and a belt speed reduction mechanism for realizing a multi-speed ratio stepless speed change.

[0053] The bearing mechanism 150 may be used to bear the speed reduction mechanism 200. For example, the speed reduction mechanism 200 may include a transmission shaft, and the bearing mechanism 150 may be provided with a bearing for bearing the transmission shaft, a bearing chamber for providing the bearing, and the like.

[0054] The speed reduction mechanism 200 and the support mechanism 150 may be disposed between the first end and the second end of the gearbox assembly. For example, in direction 1, there may be a space between the rotor assemblies 120 and 140 for accommodating the speed reduction mechanism 200 and the support mechanism 150; accordingly, the speed reduction mechanism 200 and the support mechanism 150 may be disposed in the space.

[0055] Exemplarily, the rotor assembly 120 may include two oppositely disposed ends, such as a third end and a fourth end. The rotor assembly 120 may be fixedly connected to the crankshaft at the third end. For example, the rotor assembly 120 may be fixedly connected to the crankshaft by a flange, a fastener, a clamp, or the like.

[0056] Exemplarily, a cavity may be provided at the fourth end of the rotor assembly 120, and the cavity may be used to accommodate the speed reduction mechanism 200 and / or the supporting mechanism 150. In other words, part or all of the speed reduction mechanism 200 and / or the supporting mechanism 150 may be provided in the cavity.

[0057] The following combination Figure 1 and Figure 3 , an exemplary description is given of the arrangement of the transmission assembly 100 in a vehicle. Figure 3 The arrangement shown is only an example. In some possible implementations, other arrangements may be used to arrange the transmission assembly in the vehicle (such as arranging the engine and transmission assembly 100 at the rear of the vehicle), and this embodiment of the present application is not limited to this.

[0058] For example, Figure 3 1 is a schematic diagram of a vehicle structure provided by an embodiment of the present application. Assume that the vehicle 10 is provided with an engine and a gearbox assembly 100, and the torque output by the gearbox assembly 100 can be used to drive the front wheels of the vehicle. For example, the driving form of the vehicle 10 can be front front drive. Direction 1 can also be referred to as a first direction, and direction 2 can also be referred to as a second direction.

[0059] For the gearbox assembly 100, since the rotor assemblies 120 and 140 are respectively arranged at the two ends of the gearbox assembly 100, by arranging the speed reduction mechanism 200 and the bearing mechanism 150 between the two ends of the gearbox assembly, the gearbox assembly 100 can have a smaller size in direction 2. Figure 1 Arranging the components of the transmission assembly 100 in other ways than shown will result in the transmission assembly having a larger size in Direction 1 and / or Direction 2 .

[0060] For example, if the rotor assemblies 120 and 140 are arranged side by side in direction 2, this arrangement will cause the gearbox assembly to have a larger size in direction 2 (e.g., size A), which will make it difficult to arrange the gearbox assembly when the size of the front suspension of the vehicle 10 is small. Figure 1 When the components of the gearbox assembly 100 are arranged in the manner shown, even if the rotor assemblies 120 and 140 have larger radial dimensions, the dimension of the gearbox assembly in direction 2 can be smaller than dimension A. Moreover, when the rotor assemblies 120 and 140 have larger radial dimensions, on the one hand, under the condition of the same output power, the rotor assemblies 120 and 140 can have smaller axial dimensions, which is beneficial to reducing the dimension of the gearbox assembly in direction 1; on the other hand, it is beneficial to provide a larger cavity in the rotor assembly 120, so that more parts of the speed reduction mechanism 200 and the bearing mechanism 150 can be provided in the cavity, so as to further reduce the dimension of the gearbox assembly in direction 1.

[0061] For another example, if in direction 1, the rotor assembly 140 is disposed between the reduction mechanism 200 and the rotor assembly 120, the rotor assemblies 120 and 140 may be adjacent to each other. In this arrangement, in order to prevent the rotor assemblies 120 and 140 from interfering with each other during rotation, it is necessary to dispose a partition, a housing or other components between the rotor assemblies 120 and 140, or to reserve sufficient space between the rotor assemblies 120 and 140. On the one hand, compared to Figure 1 This arrangement will increase the size of the gearbox assembly in direction 1; and the additional addition of components such as a partition plate and a housing will also increase the weight of the gearbox assembly. On the other hand, this arrangement will make the distance between the output end of the gearbox and the left front wheel of the vehicle 10 in the vehicle transverse axis direction too short, which will make it difficult to arrange the drive half shaft corresponding to the left front wheel.

[0062] In the embodiment of the present application, the rotor assemblies 120 and 140 are respectively arranged at the first end and the second end of the gearbox assembly 100, and the speed reduction mechanism 200 and the bearing mechanism 150 are arranged between the first end and the second end. On the one hand, since the rotor assemblies 120 and 140 are arranged side by side along the first direction, the gearbox assembly can have a smaller size in other directions perpendicular to the first direction; on the other hand, since the speed reduction mechanism 200 and the bearing mechanism 150 are arranged between the first end and the second end, the two can play the effect of isolating the rotor assemblies 120 and 140, and can avoid mutual interference between the rotor assemblies 120 and 140 when rotating without the need to set up components such as partitions and shells, so that the transmission assembly can have a smaller size in the first direction.

[0063] Moreover, since the rotor assembly 120 is fixedly connected to the crankshaft of the engine through the third end, the rotor assembly 120 can be directly connected to the crankshaft of the engine, and there is no need to set a flywheel, a torsional damper, or other devices between the rotor assembly 120 and the crankshaft. For the powertrain consisting of the gearbox assembly 100 and the engine, directly connecting the rotor assembly 120 to the crankshaft of the engine can further reduce the size of the powertrain in the first direction on the one hand, and can also significantly reduce the cost and weight of the powertrain on the other hand.

[0064] In addition, since the speed reduction mechanism 200 and the support mechanism 150 are arranged between the first end and the second end, and the rotor assembly 120 is provided with a cavity at the end away from the engine, for the gearbox assembly 100, when arranging the speed reduction mechanism 200 and / or the support mechanism 150, not only the space between the rotor assemblies 120 and 140 can be utilized, but also the cavity provided in the rotor assembly 120 can be utilized. In this way, the size of the gearbox assembly in the first direction can be further reduced, and the space required for arranging the power assembly can be further reduced, which is also conducive to reducing the cost and weight of the power assembly.

[0065] The above solution can effectively reduce the space occupied by the gearbox assembly and the powertrain, and improve the space utilization rate inside the system. In particular, for hybrid vehicles, when the engine needs to be placed in front and the front wheels of the vehicle are set as driving wheels, the layout space of the powertrain will be extremely limited. The above solution can achieve successful layout of the powertrain in this limited layout space.

[0066] Exemplarily, the gearbox assembly 100 may further include a housing 160, and the internal space of the housing 160 may be used to arrange the above-mentioned stator assembly 110, rotor assembly 120, stator assembly 130, rotor assembly 140, bearing mechanism 150 and reduction mechanism 200. For example, when the gearbox assembly 200 is fixedly connected to the engine, a closed space may be formed between the housing 160 and the engine to prevent the intrusion of impurities such as dust. For another example, a coolant may be provided in the sealed space, and the coolant may be used to exchange heat between the mechanism (such as rotor assemblies 120, 140, reduction mechanism 200, etc.) and components in the closed space and the outside world.

[0067] In some embodiments, the axial gap between the stator assemblies 110 and 130 may be less than or equal to 120 mm. For example, the gap between the stator assemblies 110 and 130 in direction 1 may be 80 mm, 90 mm, etc.

[0068] In the embodiment of the present application, the axial clearance between the stator assemblies 110 and 130 is less than or equal to 120 mm, which is beneficial to ensure that the gearbox assembly has a smaller size in the first direction.

[0069] In some other embodiments, the diameter of the cavity at the fourth end of the rotor assembly 120 may be less than or equal to 200 mm. For example, the diameter of the cavity may be 160 mm or 170 mm.

[0070] In the embodiment of the present application, the diameter of the cavity of the rotor assembly 120 at the fourth end may be less than or equal to 200 mm, which is beneficial to ensure that the gearbox assembly has a smaller size in the longitudinal axis direction of the vehicle.

[0071] For example, the reduction ratio of the reduction mechanism 200 may be a certain value; or, the reduction mechanism 200 may have multiple gears, and different gears may correspond to different reduction ratios. For example, even if the reduction ratio of the reduction mechanism 200 is a fixed value, when the engine maintains a certain speed, by adjusting the speed of the rotor assembly 140, different speeds can be output at the output end of the gearbox assembly.

[0072] In some embodiments, the reduction ratio of the reduction mechanism 200 may be greater than or equal to 8 and less than or equal to 11. For example, the reduction ratio of the reduction mechanism 200 may be 9, 9.5, or 10.

[0073] Combination of the above Figures 1 to 3 The gearbox assembly 100 provided in the embodiment of the present application is exemplarily described. Figures 4 to 7 , taking the reduction mechanism 200 in the gearbox assembly 100 having a fixed reduction ratio as an example, the reduction mechanism 200 and the supporting mechanism 150 are exemplarily described.

[0074] For example, Figure 4 It is a structural schematic diagram of the speed reduction mechanism 200 provided in an embodiment of the present application.

[0075] like Figure 4 As shown, the speed reduction mechanism 200 may include a speed reduction assembly 210 and a speed reduction assembly 260. The speed reduction assembly 260 may include a differential mechanism 270, and the two output ends (i.e., output end #1 and output end #2) of the differential mechanism 270 may be used to output torque to the wheels on the left and right sides. The output end of the gearbox assembly 100 may include the output end #1 and the output end #2.

[0076] In the embodiment of the present application, coupling the differential mechanism 270 to the gearbox assembly is conducive to improving the integration of the gearbox assembly. In particular, for a scenario where the engine is front mounted and the front wheels are the driving force, integrating the differential mechanism into the gearbox can further save the longitudinal space required when the torque is output from the powertrain to the front wheels.

[0077] The reduction assembly 260 may further include a gear 262, and the differential mechanism 270 may be in driving connection with the gear 262. Accordingly, the reduction assembly 210 may include a gear 212 meshed with the gear 262. The reduction assembly 210 may receive the torque output of the rotor assembly 140, and the torque may be transmitted to the reduction assembly 260 through the gear 212.

[0078] like Figure 4 As shown, the reduction assembly 210 may include a transmission shaft 232 and a transmission shaft 238. The transmission shaft 232 and the transmission shaft 238 may be arranged in parallel. The transmission shaft 232 may be used to drive the connection between the rotor assembly 140 and the gear 234; the transmission shaft 238 may be used to drive the connection between the gear 236 and the gear 212. The gear 234 may mesh with the gear 236. For example, the gears 236 and 212 may be connected to the transmission shaft 238 by means of splines, flat keys, etc. For another example, the gears 236 and 212 may be coupled to the transmission shaft 238, that is, the transmission shaft 238 may be a gear shaft.

[0079] In this scenario, the transmission shaft 232, the transmission shaft 238, the gear 234 and the gear 236 can constitute the parallel axis reduction mechanism 230. Accordingly, the bearing mechanism 150 can play the role of bearing the reduction assembly 210 by bearing the transmission shafts 232 and 238. For example, the bearing mechanism 150 may include bearings and corresponding bearing chambers for bearing the transmission shafts 232 and 238; some bearings and bearing chambers may be arranged in the cavity of the rotor assembly 120. The arrangement of the transmission shaft, the bearing and the bearing chamber will be described later in conjunction with Figure 6 and Figure 7 This is just an illustrative explanation and will not be elaborated here.

[0080] In the embodiment of the present application, through the parallel shaft reduction mechanism, a plurality of gear sets with smaller reduction ratios can be used to achieve a larger reduction ratio for the entire gearbox assembly.

[0081] It can be understood that the stator assemblies 110, 130 and the housing 160 in the gearbox assembly 100 are Figure 4 Not shown in the figure.

[0082] The above takes the parallel shaft reduction mechanism as an example, combined with Figure 4 The deceleration mechanism is described as an example. In other implementations, the gearbox assembly may also use other deceleration mechanisms, which are not limited in the present application. For example, the planetary gear mechanism is used as an example in the following. Figure 5 The structure of the speed reduction mechanism 200 has been described as an example.

[0083] For example, Figure 5 is another structural schematic diagram of the speed reduction mechanism 200 provided in the embodiment of the present application. Figure 4 In the same manner, the reduction assembly 210 may include a gear 212 meshed with the gear 262. The reduction assembly 210 may transmit the torque output by the rotor assembly 140 to the reduction assembly 260 via the gear 212.

[0084] like Figure 5 As shown, the reduction assembly 210 may further include a planetary gear mechanism 220. The planetary gear mechanism 220 may include a sun gear 221, a ring gear 222, and an intermediate element 223 for drivingly connecting the sun gear 221 and the ring gear 222; the ring gear 222 may be fixedly connected to the supporting mechanism 150. For example, the intermediate element 223 may include a planetary gear 224 and a planet carrier 225, as shown in FIG. Figure 3 As another example, in some possible implementations, the intermediate element 223 may adopt a multi-stage reduction method.

[0085] The reduction assembly 210 may further include a transmission member 214 for transmission connection between the rotor assembly 140 and the planetary gear mechanism 220. For example, the transmission member 214 may transmission connection between the rotor assembly 140 and the sun gear 221.

[0086] In one embodiment, the transmission member 214 may be a transmission shaft. The rotor assembly 140 may be disposed at one end of the transmission shaft, and the sun gear may be disposed at the other end of the transmission shaft. For example, the rotor assembly 140 may be connected to the transmission shaft by means of a spline connection, a key connection, an interference fit, or the like. For another example, the sun gear 221 may be connected to the transmission shaft by means of a spline connection, a key connection, or the like. For another example, the sun gear 221 may be coupled to the transmission shaft. In other words, the transmission shaft and the sun gear may be different parts of the same component (such as a gear shaft).

[0087] In the reduction assembly 210, the gear 212 can be connected to the intermediate element 223 in a transmission manner; that is, the rotation of the intermediate element 223 can drive the gear 212 to rotate. For example, the gear 212 can be connected to the planet carrier 225 in a transmission manner by means of a spline, a flat key, a fastener, etc.

[0088] In the embodiment of the present application, a planetary gear mechanism 220 may be provided in the reduction assembly 210. On the one hand, compared with other gear reduction mechanisms, the planetary gear mechanism has a compact structure, a small volume, and a light weight, which is conducive to making full use of the cavity in the rotor assembly 120 to set the reduction mechanism. On the other hand, the bearing mechanism corresponding to the planetary gear reduction mechanism is relatively simple, which is conducive to making full use of the cavity in the rotor assembly 120 to set the bearing mechanism 150. Therefore, by reasonably setting the form adopted by the reduction mechanism, the space utilization rate of the system can be improved, thereby further reducing the size of the gearbox assembly in the first direction.

[0089] The above takes the reduction mechanism 200 using a parallel shaft reduction mechanism and a planetary gear mechanism as an example. Figure 4 and Figure 5 The structure of the speed reduction mechanism 200 is exemplarily described. In some possible implementations, the speed reduction mechanism 200 may also have other structural forms, such as a speed reduction mechanism including multiple gears, a speed reduction mechanism capable of achieving stepless speed change, etc., which is not limited in the embodiments of the present application.

[0090] The following combination Figure 6 and Figure 7 ,by Figure 5 Taking the illustrated solution as an example, the structure of the supporting mechanism 150 is exemplarily described. Figure 6 and / or Figure 7 The arrangement of the bearings and bearing chambers shown in the figure can also be applied to other types of speed reduction mechanisms (such as Figure 4 The deceleration mechanism shown in the figure is not limited to this embodiment of the present application.

[0091] For example, Figure 6 1 is a schematic diagram of a structure of a supporting mechanism 150 provided in an embodiment of the present application. Figure 6 In, with Figures 1 to 5 Parts with the same or similar functions are used Figures 1 to 5 For the planetary gear mechanism 220, Figure 6 Only the sun gear 221 is shown, and other components in the planetary gear mechanism 220 are represented by dotted-line frames.

[0092] like Figure 6 As shown, the transmission member 214 may be a transmission shaft, which may be connected to the rotor assembly 140 and the sun gear 221 through a key connection. When the rotor assembly 140 rotates, the transmission shaft and the sun gear 221 will be driven to rotate.

[0093] By supporting / carrying the transmission shaft, the support mechanism 150 can support the sun gear 221 and the planetary gear mechanism 220 .

[0094] For example, Figure 6 As shown, the bearing mechanism 150 may include a plurality of bearings for supporting the transmission shaft 214, such as bearing 241 and bearing 242; the bearing mechanism 150 may also include a bearing chamber for arranging bearings, such as bearing chambers 151 and 152. The bearing chamber 151 may be used to arrange the bearing 241; the bearing chamber 152 may be used to arrange the bearing 242. Since the rotor assembly 120 is provided with a cavity, one end of the transmission shaft 214 may be extended into the cavity, and the bearing chamber 152 and the bearing 242 may be arranged in the cavity to reduce the space occupied by the gearbox in direction 1. For example, the bearing chamber may be connected to the housing 160 of the gearbox assembly 100, or coupled to the housing 160.

[0095] In some embodiments, for the cavity on the rotor assembly 120, when the radial dimension of the cavity is larger than the radial dimension of the planetary gear mechanism, the planetary gear mechanism 220 may also be disposed in the cavity, such as Figure 6 shown.

[0096] In some embodiments, the transmission shaft 214 may be provided with a plurality of diameter sections, and different diameter sections may be transmission-connected with different components. For example, the rotor assembly 140 may be installed on the diameter section 1 of the transmission shaft 214, and the sun gear 221 may be installed on the diameter section 2 of the transmission shaft 214; Figure 6 Different from the way shown, the diameter section 1 and the diameter section 2 can have different diameters.

[0097] For example, Figure 7is another structural schematic diagram of the support mechanism 150 provided in the embodiment of the present application. Figure 7 Only the planet carrier 225 is shown in the figure, and other components in the planetary gear mechanism 220 are represented by dashed boxes. Figure 6 Similar to the method shown, the transmission member 214 can be a transmission shaft. Figure 6 The difference between the scheme shown is that Figure 7 In the illustrated embodiment, part of the bearing chamber may be disposed on the planet carrier 225 .

[0098] Exemplarily, the gearbox assembly 100 may include a bearing, such as bearing 244, for carrying the planet carrier 225. Figure 7 As shown, the bearing mechanism 150 may further include a bearing chamber 154 for bearing the bearing 244. The planet carrier 225 may include an axial body portion 2251 and an outer ring portion 2252; the outer ring portion 2252 may be used to set the planetary gear 224, and the bearing component corresponding to the planet carrier 225 (such as the bearing 224) may be set on the axial body portion 2251 of the planet carrier 225.

[0099] In some embodiments, such as Figure 7 As shown, part or all of the planet carrier 225 may be located in the cavity of the rotor 120 ; the bearing 244 and the bearing chamber 154 may also be disposed in the cavity.

[0100] In the embodiment of the present application, the planet carrier 225 and the corresponding bearing mechanism are arranged by utilizing the cavity of the rotor assembly 120, so that the utilization rate of the internal space of the gearbox assembly 100 can be improved and the size of the gearbox assembly can be further reduced.

[0101] Exemplarily, the gearbox assembly 100 may include a bearing, such as a bearing 241 , for supporting the transmission shaft 214 .

[0102] In some embodiments, Figure 6 In a similar manner as shown, the bearing chambers of these bearings may be formed by the bearing mechanism 150, such as bearing chambers 241 and 242. In this case, the bearing (such as bearing 242) for supporting the transmission shaft 214 on the side close to the rotor assembly 120 may be arranged closer to the rotor assembly 120 in direction 1 to avoid the planet carrier 225; accordingly, the axial dimension of the transmission shaft 214 may be larger than that of the rotor assembly 120. Figure 7 The shown solution is slightly longer.

[0103] In some other embodiments, the bearing chambers of these bearings may also be disposed in components of the speed reduction mechanism 200. Figure 7As shown, the shaft body portion 2251 may be provided with a through hole along its axis, and the transmission shaft 214 may be provided through the through hole; the through hole may be provided with a bearing chamber structure, and the bearing 243 for carrying the transmission shaft 214 may be provided in the through hole. In this case, the bearing for carrying the transmission shaft 214 close to the rotor assembly 120 side may not need to avoid the planet carrier 225, which can further reduce the size of the gearbox assembly 100 in direction 1.

[0104] By means of the above method, the space occupied by the gearbox assembly 100 in direction 1 can be further reduced.

[0105] Combination of the above Figure 6 and Figure 7 , the bearing mechanism 150 includes a bearing and a bearing chamber as an example, and the manner in which the bearing mechanism 150 carries the speed reduction mechanism 200 is exemplarily described. It can be understood that in Figure 6 and Figure 7 The structure / components used to connect the bearing chamber (151, 152, 154) and the housing 160 are not shown. For example, the bearing chamber 152 can be fixedly connected to the housing 160 of the gearbox assembly through structures such as brackets and partitions.

[0106] Some possible implementations include: Figure 4 Regarding the arrangement of the transmission shaft, bearings and bearing chamber in the scheme shown, please refer to the above Figure 6 and / or Figure 7 For example, the bearings for supporting the transmission shafts 234 and 238 may be partially or completely disposed in the cavity of the rotor assembly 120 .

[0107] In the embodiment of the present application, by arranging the bearing for carrying the reduction mechanism and the corresponding bearing chamber in the cavity of the rotor assembly 120, the size of the gearbox assembly in the first direction can be greatly reduced.

[0108] In the above, the planetary gear mechanism 220 is used as the deceleration assembly 210 as an example. Figures 4 to 6 The structure of the speed reduction mechanism is described as an example. In other embodiments, the speed reduction assembly 210 may also adopt other forms of speed reduction mechanisms. For example, the speed reduction assembly 210 may adopt a solution combining a parallel shaft speed reduction mechanism and a planetary gear speed reduction mechanism.

[0109] The following combination Figure 8 The structure of the rotor assembly 120 and the arrangement of the cavity are exemplarily described.

[0110] For example, Figure 8 It is a structural schematic diagram of the rotor assembly 120 provided in an embodiment of the present application.

[0111] like Figure 8As shown, the rotor assembly 120 may include a rotor support 121 and a rotor core 122. The rotor support 121 may be used to be fixedly connected to the crankshaft of the engine. The relative action between the rotor core 122 and the stator assembly 120 may convert mechanical energy into electrical energy.

[0112] In some embodiments, the rotor core 122 may be provided with a through hole along direction 1, and the rotor bracket 121 may be provided through the through hole. For example, the rotor core 122 may be annular, and its axial size may be set as required. For another example, one end of the rotor bracket 121 may be provided with a cavity, which may be used to constitute a cavity of the rotor assembly 120 for accommodating a reduction mechanism and / or a bearing mechanism.

[0113] In some other embodiments, the rotor core 122 may be connected to the rotor bracket 121. For example, the two may be connected by welding, fastener connection, spline connection, interference connection, etc., so that the rotor core 122 can be driven to rotate when the rotor bracket 121 rotates.

[0114] For example, since the crankshaft of the engine is often provided with a flange surface at its output end, in order to save the size of the powertrain in direction 1, the rotor assembly 120 may include a flange surface 123 provided at the third end, and the flange surface may be used for fixed connection with the flange surface of the crankshaft. Figure 8 As shown, the flange surface 123 may be disposed at the end of the rotor support 121 and may be disposed opposite to the cavity on the rotor support 121. For example, the two flange surfaces may be fixedly connected by fasteners.

[0115] In the embodiment of the present application, by providing a flange surface at the end of the rotor assembly 120, the flange surface can be fixedly connected to the flange surface of the crankshaft, and there is no need to provide a rotating shaft or other components for connecting the rotor assembly 120 and the crankshaft, which is beneficial to simplifying the connection method between the rotor assembly 120 and the crankshaft, and can save the size of the powertrain including the hybrid box assembly and the engine.

[0116] Combination of the above Figures 1 to 8 The structure of the gearbox assembly is described as an example. Figure 5 Taking the speed reduction mechanism 200 as an example, the working mode of the gearbox assembly 100 is briefly introduced.

[0117] Method 1: The “motor” consisting of the rotor assembly 140 and the stator assembly 130 is driven by an energy storage device, and the vehicle operates in pure electric mode.

[0118] When the "motor" is working, the rotor assembly 140 rotates and outputs the speed and torque to the outside. Through the connecting piece 214, the rotor assembly 140 can drive the sun gear 221 to rotate. Since the ring gear 222 is fixed to the bearing mechanism 150, the sun gear 221 can drive the planetary gear 224 and the planetary carrier 225 to rotate, and transmit the torque and speed to the gear 212 connected to the planetary carrier 225. Since the gear 212 is meshed with the gear 262, the torque and speed can be transmitted to the wheels on the left and right sides through the output end #1 and the output end #2 respectively.

[0119] Method 2: The electric energy generated by the rotor assembly 120 drives the “motor” composed of the rotor assembly 140 and the stator assembly 130 .

[0120] When the engine is working, the crankshaft drives the rotor assembly 120 to rotate; at this time, the interaction between the rotor assembly 120 and the stator assembly 110 can convert mechanical energy into electrical energy. The electrical energy can drive the rotor assembly 140 to rotate; further, the torque and speed are transmitted to the wheels on the left and right sides through the speed reduction mechanism 200.

[0121] The first mode can be understood as a pure electric drive mode; the second mode can be understood as a series hybrid power drive.

[0122] Although the working mode of the gearbox assembly 100 is relatively simple and does not involve driving modes such as engine direct drive and parallel hybrid drive, for a traditional gearbox assembly, since it often uses a low-power drive motor, under some working conditions, the engine is required to provide torque to the wheels together (i.e., parallel hybrid drive mode) to compensate for the defect of insufficient output power of the drive motor.

[0123] In the embodiment of the present application, since the rotor assemblies 120 and 140 are not arranged side by side in direction 2, but are arranged side by side in direction 1, the rotor assemblies 120 and 140 can have a larger radial size; accordingly, the "motor" composed of the rotor assembly 140 and the stator assembly 130 can have a larger output power. Therefore, even if the working mode of the gearbox assembly 100 is simpler, it can meet the use requirements under different working conditions.

[0124] In addition, for the motor and its components (such as the stator assembly and the rotor assembly), their costs will continue to decline as the relevant technologies develop and mature; for traditional mechanical components (such as gears in the reduction mechanism and other components), due to the relative maturity of the current relevant technologies, it is difficult for their costs to have a major breakthrough. In the embodiment of the present application, by simplifying the working mode of the gearbox assembly, the structure of the reduction mechanism can be simplified, and the volume, weight and cost of the reduction mechanism in the gearbox assembly can be reduced; even if a rotor assembly with a larger radial size is used in the gearbox assembly, combined with the development trend of vehicle technology, from a long-term perspective, the gearbox assembly can still have a significant cost advantage.

[0125] Combination of the above Figures 1 to 8 The gearbox assembly provided in the embodiment of the present application is exemplarily described.

[0126] The present application also provides a powertrain, which may include an engine and the above-mentioned Figures 1 to 8 The gearbox assembly of any one of the embodiments.

[0127] The embodiment of the present application also provides a vehicle, which may include the above Figures 1 to 8 The gearbox assembly in any embodiment may, alternatively, include the power assembly described above.

[0128] The vehicles involved in the embodiments of the present application may be vehicles in a broad sense, and may be vehicles (such as commercial vehicles, passenger cars, motorcycles, flying cars, trains, etc.), industrial vehicles (such as forklifts, trailers, tractors, etc.), engineering vehicles (such as excavators, bulldozers, cranes, etc.), agricultural equipment (such as mowers, harvesters, etc.), amusement equipment, toy vehicles, etc. The embodiments of the present application do not specifically limit the types of vehicles. For example, the vehicle in the present application may be a hybrid electric vehicle (HEV), a range extended electric vehicle (REEV), a plug-in hybrid electric vehicle (PHEV) or a new energy vehicle (NEV), etc.

[0129] The detailed description and drawings of the above embodiments are used to exemplarily illustrate the principles of the present application, but cannot be used to limit the scope of the present application, that is, the present application is not limited to the described embodiments.

[0130] Unless the context requires otherwise, throughout the specification and claims, the term "comprise" and other forms such as the third person singular form "comprises" and the present participle form "comprising" are to be interpreted as open and inclusive, that is, "including, but not limited to". In the description of the specification, the terms "one embodiment", "some embodiments", "exemplary embodiments", "example", "specific example" or "some examples" are intended to indicate that the specific features, structures, materials or characteristics associated with the embodiment or example are included in at least one embodiment or example of the present application. The schematic representation of the above terms does not necessarily refer to the same embodiment or example. In addition, the specific features, structures, materials or characteristics can be included in any one or more embodiments or examples in any appropriate manner.

[0131] The terms "first" and "second" described in the embodiments of the present application are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present application, unless otherwise specified, the meaning of "multiple" refers to two or more.

[0132] The directional words appearing in the description of the embodiments of the present application are all directions shown in the figures, and do not limit the specific structures in the embodiments of the present application. In the description of the embodiments of the present application, it should also be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0133] Mentioning "embodiment" in the embodiments of the present application means that the specific features, structures or characteristics described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in the present application can be combined with other embodiments.

[0134] The term "and / or" in this application is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this application generally indicates that the associated objects before and after are in an "or" relationship.

[0135] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

[0136] In addition, the use of “based on” is meant to be open and inclusive, because the process, step, calculation or other action “based on” one or more stated conditions or values ​​may in practice be based on additional conditions or values ​​beyond the stated ones.

[0137] "About", "approximately" or "approximately" as used in the examples of this application include the stated value and an average value within an acceptable deviation range of the particular value, wherein the acceptable deviation range is determined by a person of ordinary skill in the art taking into account the measurement in question and the errors associated with the measurement of the particular quantity, i.e., the limitations of the measurement system.

[0138] In the several embodiments provided in the present application, it should be understood that the embodiments described above are merely exemplary. For example, the division of the modules is merely a logical function division, and there may be other division methods in actual implementation. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed.

[0139] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A gearbox assembly (100), characterized in that: The gearbox assembly (100) comprises a first stator assembly (110), a first rotor assembly (120), a second stator assembly (130), a second rotor assembly (140), a bearing mechanism (150) and a speed reduction mechanism (200). The gearbox assembly (100) is used to be fixedly connected to the engine at a first end; the first rotor assembly (120) is arranged in a first accommodation space of the first stator assembly (110) and is arranged at the first end together with the first stator assembly (110); the second rotor assembly (140) is arranged in a second accommodation space of the second stator assembly (130) and is arranged at the second end of the gearbox assembly (100) together with the second stator assembly (130); the bearing mechanism (150) and the speed reduction mechanism (200) are arranged between the first end and the second end, and the first end and the second end are arranged opposite to each other; The second rotor assembly (140) is used to output torque, the reduction mechanism (200) is drivingly connected to the second rotor assembly (140), the support mechanism (150) is used to support the reduction mechanism (200), and the output end of the gearbox assembly (100) is drivingly connected to the reduction mechanism (200); The first rotor assembly (120) comprises a third end and a fourth end which are arranged opposite to each other, the first rotor assembly (120) being used for being fixedly connected to the crankshaft of the engine at the third end, and the fourth end being provided with a first cavity, the first cavity being used for accommodating the speed reduction mechanism (200) and / or the supporting mechanism (150).

2. The gearbox assembly (100) according to claim 1, characterized in that: The speed reduction mechanism (200) comprises a planetary gear mechanism (220) and a first transmission member (214); The planetary gear mechanism (220) comprises a sun gear (221), a ring gear (222), and an intermediate element (223) for drivingly connecting the sun gear (221) and the ring gear (222), and the ring gear (222) is fixedly connected to the supporting mechanism (150); The first transmission member (214) is used for transmission connection between the sun gear (221) and the second rotor assembly (140); one end of the first transmission member (214) close to the first rotor assembly (120) is arranged in the first cavity.

3. The gearbox assembly (100) according to claim 2, characterized in that: The first transmission member (214) comprises a transmission shaft, and the intermediate element (223) comprises a planetary gear (224) and a planetary carrier (225); The bearing mechanism (150) comprises a first bearing (242) for bearing the transmission shaft and a first bearing chamber (152) for arranging the first bearing (242); the first bearing chamber (152) is arranged in the first cavity; and / or, The supporting mechanism (150) comprises a second bearing (244) for supporting the planet carrier (225) and a second bearing chamber (154) for arranging the second bearing (244); the second bearing chamber (154) is arranged in the first cavity.

4. The gearbox assembly (100) according to claim 3, characterized in that: The planet carrier (225) comprises a shaft portion (2251) and an outer ring portion (2252), wherein the outer ring portion (2252) is used to set the planet gear (224); The shaft body portion (2251) is provided with a first through hole, the transmission shaft is arranged through the first through hole, and a third bearing (243) for supporting the transmission shaft is arranged in the first through hole.

5. The gearbox assembly (100) according to any one of claims 2 to 4, characterized in that: Part or all of the sun gear (221) is disposed in the first cavity; Part or all of the intermediate element (223) is disposed in the first cavity; and / or, Part or all of the gear ring (222) is disposed in the first cavity.

6. The gearbox assembly (100) according to claim 1, characterized in that: The speed reduction mechanism (200) comprises a first gear (234), a second gear (236) meshing with the first gear (234), a second transmission member (232) for transmission connection between the second rotor assembly (140) and the first gear (234), and a third transmission member (238) transmission connection with the second gear (236); The first gear (234) and the second gear (236) are arranged in parallel; The second transmission member (232) and / or the third transmission member (238) is arranged in the first cavity at one end close to the first rotor assembly (120).

7. The gearbox assembly (100) according to any one of claims 2 to 6, characterized in that: The speed reduction mechanism (200) further comprises a third gear (212), a fourth gear (262) meshing with the third gear (212), and a differential mechanism (270) drivingly connected to the fourth gear (262); the third gear (212) is drivingly connected to the intermediate element (223) or the third transmission member (238); The output end of the transmission assembly (100) comprises a first output end and a second output end, and the first output end and the second output end are respectively drivingly connected to two oppositely arranged ends of the differential mechanism (270).

8. The gearbox assembly (100) according to any one of claims 1 to 7, characterized in that: The first rotor assembly (120) comprises a rotor support (121) and a rotor core (122); the rotor core (122) is provided with a second through hole; the rotor support (121) is arranged through the second through hole and is connected to the rotor core (122); and the first cavity is provided in the rotor support (121).

9. The gearbox assembly (100) according to any one of claims 1 to 8, characterized in that: A first flange surface is provided at one end of the crankshaft close to the gearbox assembly (100); The first rotor assembly (120) comprises a second flange surface (123) arranged at the third end, and the second flange surface (123) is used for being fixedly connected to the first flange surface via a fastener.

10. The gearbox assembly (100) according to any one of claims 1 to 9, characterized in that: The gearbox assembly (100) further includes a housing (160); The first stator assembly (110), the first rotor assembly (120), the second stator assembly (130), the second rotor assembly (140), the supporting mechanism (150) and the speed reduction mechanism (200) are arranged in the internal space of the housing (160), and the internal space of the housing (160) is provided with a coolant.

11. The gearbox assembly (100) according to any one of claims 1 to 10, characterized in that: The reduction ratio of the reduction mechanism (200) is greater than or equal to 8 and less than or equal to 11.

12. The gearbox assembly (100) according to any one of claims 1 to 11, characterized in that: The first rotor assembly (120) and the second rotor assembly (140) are coaxially arranged; and / or, An axial gap between the first stator assembly (110) and the second stator assembly (130) is less than or equal to 120 millimeters.

13. The gearbox assembly (100) according to any one of claims 1 to 12, characterized in that: The diameter of the first cavity is less than or equal to 200 mm.

14. A powertrain, characterized in that: The powertrain comprises an engine, and the powertrain further comprises a transmission assembly (100) according to any one of claims 1 to 13.

15. A vehicle, characterized in that: The vehicle comprises the transmission assembly according to any one of claims 1 to 13, or comprises the powertrain according to claim 14.

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