Hybrid drive system and vehicle

Abstract

The application relates to a hybrid driving system and a vehicle. The hybrid driving system comprises a power assembly and a first intermediate shaft for being connected with wheels of the vehicle, the power assembly comprises an engine, a first motor and a second motor, the engine comprises a first output shaft extending along a first direction, the first motor, the first intermediate shaft and the second motor are arranged at intervals along a second direction, the first output shaft of the engine, the first motor and the second motor are respectively in driving connection with the first intermediate shaft to drive the wheels to rotate, and the first direction and the second direction intersect with each other. The hybrid driving system can improve the compactness of the hybrid driving system, is favorable for optimizing the overall arrangement of the vehicle, is favorable for the production and manufacturing of commercial vehicles, and in addition, the hybrid driving system can realize power coupling of the engine, the first motor and the second motor, and is favorable for providing greater driving force for the running of the vehicle.

Description

Technical Field

[0001] This application relates to the field of vehicle drive technology, and in particular to hybrid drive systems and vehicles. Background Technology

[0002] In related technologies, with the further strengthening of fuel consumption regulations, the power source of commercial vehicles is gradually shifting from thermal power sources to hybrid power sources, meaning that the power source of commercial vehicles simultaneously possesses both thermal and electric power sources. Hybrid power source vehicles have a hybrid drive system with three driving modes: pure electric drive, pure engine drive, and hybrid drive, thereby reducing emissions and contributing to energy conservation and environmental protection.

[0003] However, when commercial vehicles adopt the aforementioned hybrid drive system, they are prone to problems with overall vehicle layout, which in turn affects the production, manufacturing, and use of commercial vehicles equipped with hybrid power sources. Summary of the Invention

[0004] Therefore, it is necessary to provide a hybrid drive system and vehicle that improves upon the aforementioned deficiencies in addressing the difficulties in vehicle layout caused by the use of hybrid drive systems in commercial vehicles in related technologies.

[0005] A hybrid drive system includes a power assembly and a first intermediate shaft for connection to the wheels of a vehicle. The power assembly includes an engine, a first motor, and a second motor. The engine includes a first output shaft extending in a first direction. The first motor, the first intermediate shaft, and the second motor are spaced apart in a second direction. The first output shaft of the engine, the first motor, and the second motor are respectively drivenly connected to the first intermediate shaft to drive the wheels to rotate.

[0006] The first and second directions intersect each other.

[0007] In one embodiment, the first motor includes a second output shaft extending in a second direction, and the hybrid drive system further includes a first planetary gear set, which includes a first sun gear, first planet gears externally meshing with the first sun gear, a first planet carrier connected to the first planet gears, and a first ring gear internally meshing with the first planet gears. The first sun gear is connected to the second output shaft of the first motor, the first planet carrier is connected to the engine, and the first ring gear is connected to the first intermediate shaft.

[0008] In one embodiment, the second motor includes a third output shaft extending along a second direction, and the hybrid drive system also includes a second planetary gear set, which includes a second sun gear, second planet gears externally meshing with the second sun gear, a second planet carrier connected to the second planet gears, and a second ring gear internally meshing with the second planet gears. The second sun gear is connected to the third output shaft of the second motor, the second ring gear is used to connect to the housing of the hybrid drive system, and the second planet carrier is connected to the end of the first intermediate shaft away from the first ring gear.

[0009] In one embodiment, the hybrid drive system further includes a bevel gear set, which includes a bevel drive gear and a bevel driven gear that mesh with each other. The bevel drive gear is located on the first output shaft of the engine, and the bevel driven gear is arranged along a second direction and connected to the first planet carrier of the first planetary gear set.

[0010] In one embodiment, the hybrid drive system further includes a second intermediate shaft and a reduction mechanism. The second intermediate shaft is used to connect to the wheels, and the reduction mechanism includes a first-stage reduction mechanism disposed between the first and second intermediate shafts. The first-stage reduction mechanism is used to transmit the power applied to the first intermediate shaft by the power assembly to the second intermediate shaft to drive the wheels to rotate.

[0011] In one embodiment, the first-stage reduction mechanism includes a first-gear transmission mechanism and a second-gear transmission mechanism, and the hybrid drive system further includes a shifting element disposed on the second intermediate shaft;

[0012] The hybrid drive system has a first gear transmission mode and a second gear transmission mode. When the hybrid drive system is in the first gear transmission mode, the shift element connects the first gear transmission mechanism and the second intermediate shaft. When the hybrid drive system is in the second gear transmission mode, the shift element connects the second gear transmission mechanism and the second intermediate shaft.

[0013] In one embodiment, the first gear transmission mechanism includes a first gear set, which includes a first driving gear and a first driven gear that mesh with each other. The first driving gear is connected to a first intermediate shaft, and the first driven gear is connected to a second intermediate shaft.

[0014] The two-speed transmission mechanism includes a second gear set, which includes a second driving gear and a second driven gear that mesh with each other. The second driving gear is connected to a first intermediate shaft, and the second driven gear is connected to a second intermediate shaft.

[0015] In one embodiment, the reduction mechanism further includes a second-stage reduction mechanism, and the hybrid drive system further includes a differential for connecting to the wheels. The second-stage reduction mechanism is disposed between the second intermediate shaft and the differential, and is used to transmit the power applied to the second intermediate shaft by the power component to the differential to drive the wheels to rotate.

[0016] The second-stage reduction mechanism includes a third gear set, which includes a third driving gear and a third driven gear that mesh with each other. The third driving gear is connected to the second intermediate shaft, and the third driven gear is connected to the differential.

[0017] In one embodiment, the differential includes a differential housing, a half-shaft gear disposed within the differential housing, and a differential lock disposed on the differential housing. The differential housing is connected to a third driven wheel, the half-shaft gear is used to connect to the half-shaft of the vehicle, and the differential lock is used to lock the half-shaft and the differential housing when the wheel slips.

[0018] A vehicle includes a half-shaft, wheels connected to the half-shaft, and the aforementioned hybrid drive system, wherein a first intermediate shaft of the hybrid drive system is used to drive the half-shaft to rotate, thereby causing the wheels to rotate.

[0019] Through the above technical solution, since the first output shaft of the engine extends along the first direction, more space can be provided for the engine's arrangement in the longitudinal direction of the vehicle (i.e., the length direction of the vehicle). This means the axial dimension of the engine can have a wider range, which is beneficial for optimizing the overall vehicle layout of vehicles using the hybrid drive system provided in this application, and thus beneficial for the production and manufacturing of commercial vehicles. Furthermore, the first motor, the first intermediate shaft, and the second motor are arranged at intervals along the second direction. The first output shaft of the engine, the first motor, and the second motor are respectively connected to the first intermediate shaft via transmission. This improves the structural compactness of the hybrid drive system provided in this application, achieves power coupling between the engine, the first motor, and the second motor, and helps provide greater driving force for vehicle movement. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the hybrid power drive system in one embodiment of this application.

[0021] Figure 2 for Figure 1 An enlarged schematic diagram of part A in the middle.

[0022] Figure 3 for Figure 1 Enlarged diagram of part B.

[0023] Figure 4 for Figure 1 An enlarged schematic diagram of section C.

[0024] Explanation of reference numerals in the attached diagram: 10-Engine; 20-First motor; 30-Second motor; 40-First intermediate shaft; 50-Second intermediate shaft; 60-Differential; 61-Differential housing; 62-Differential lock; 63-Planetary gear; 64-Half-shaft gear; 70-Bevel gear set; 71-Bevel driving gear; 72-Bevel driven gear; 80-First planetary gear set; 81-First sun gear; 82-First planetary gear; 83-First planetary carrier; 84-First ring gear; 90-Second... Planetary gear set; 91-Second sun gear; 92-Second planet gear; 93-Second planet carrier; 94-Second ring gear; 100-First stage reduction mechanism; 110-First gear transmission mechanism; 111-First driving gear; 112-First driven gear; 120-Second gear transmission mechanism; 121-Second driving gear; 122-Second driven gear; 200-Second stage reduction mechanism; 210-Third driving gear; 220-Third driven gear; 1-Shifting element; 2-Half shaft; 3-Wheel. Detailed Implementation

[0025] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0026] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0028] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0029] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0030] It should be noted that an element is referred to as being "fixed to" or "set on" another element, which may be directly on the other element or may also include an intervening element. An element is considered to be "connected" to another element, which may be directly connected to the other element or may also include an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation. "First direction" may be the length direction of the vehicle, and "second direction" may be the width direction of the vehicle.

[0031] In related technologies, a vehicle may include a laterally arranged half-shaft and wheels connected to both ends of the half-shaft. In a hybrid drive system, the engine acts as a power source, driving the rotation of the half-shaft, which in turn drives the wheels. To achieve engine-driven half-shaft rotation, the engine is typically arranged laterally so that its power can be transmitted laterally. The engine's power is transmitted to the half-shaft via a transmission and reduction structure, ultimately achieving engine-driven half-shaft rotation. Due to the limited lateral dimensions of a vehicle (i.e., its width), passenger cars, with their smaller overall weight and smaller engine dimensions, are less likely to have their axial dimensions restricted laterally when the engine is arranged laterally. However, commercial vehicles, with their larger overall weight and larger engine dimensions, are more likely to have their axial dimensions restricted laterally when the engine is arranged laterally, leading to difficulties in overall vehicle layout and impacting production and manufacturing. For commercial vehicles, providing greater driving force when using a hybrid drive system is also a pressing issue that needs to be addressed.

[0032] See Figures 1 to 4 This application provides a hybrid drive system including a power assembly and a first intermediate shaft 40 for connection with the wheels 3 of a vehicle. The power assembly includes an engine 10, a first motor 20 and a second motor 30. The engine 10 includes a first output shaft extending along a first direction. The first motor 20, the first intermediate shaft 40 and the second motor 30 are arranged at intervals along a second direction. The first output shaft of the engine 10, the first motor 20 and the second motor 30 are respectively connected to the first intermediate shaft 40 for driving the wheels 3 to rotate. The first direction and the second direction intersect each other.

[0033] With the above technical solution, since the vehicle's longitudinal dimension (i.e., the vehicle's length) is larger than its transverse dimension (i.e., the vehicle's width), the extension of the first output shaft of the engine 10 along the first direction can provide more space for the longitudinal arrangement of the engine 10 in the vehicle. That is, the axial dimension of the first output shaft of the engine 10 can have a larger range, which is beneficial to optimizing the overall vehicle layout of the vehicle using the hybrid drive system provided in this application, and thus beneficial to the production and manufacturing of the vehicle, especially the production and manufacturing of commercial vehicles.

[0034] Furthermore, since the first output shaft of the engine 10, the first motor 20, and the second motor 30 are respectively connected to the first intermediate shaft 40, the power output of the engine 10, the first motor 20, and the second motor 30, as power sources, can all be applied to the first intermediate shaft 40, achieving power coupling between the engine 10, the first motor 20, and the second motor 30 on the first intermediate shaft 40. This facilitates providing greater driving force for the vehicle. The first motor 20, the second motor 30, and the first intermediate shaft 40 are arranged along a second direction, and the first motor 20 and the second motor 30 are respectively connected to the first intermediate shaft 40, thereby improving the structural compactness of the hybrid drive system provided in this application and optimizing the overall vehicle layout.

[0035] It is understood that the hybrid drive system provided in this application can be applied to both integral drive axles and disconnected drive axles. In one embodiment, the first output shaft of the engine 10 may also be equipped with a clutch device to engage or disengage power transmission.

[0036] In one embodiment, see [reference] Figure 1 and Figure 2 The first motor 20 may include a second output shaft extending along a second direction. The hybrid drive system may also include a first planetary gear set 80, which may include a first sun gear 81, first planetary gears 82 externally meshed with the first sun gear 81, a first planet carrier 83 connected to the first planetary gears 82, and a first ring gear 84 internally meshed with the first planetary gears 82. The first sun gear 81 may be connected to the second output shaft of the first motor 20, the first planet carrier 83 may be connected to the engine 10, and the first ring gear 84 may be connected to the first intermediate shaft 40. Since the second output shaft of the first motor 20 can drive the first sun gear 81 to rotate, the first sun gear 81 can drive the first planetary gears 82 to rotate, and the first planetary gears 82 can drive the first ring gear 84 to rotate, the power output by the first motor 20 can be applied to the first intermediate shaft 40.

[0037] The first output shaft of engine 10 and the second output shaft of first motor 20 are respectively connected to the first intermediate shaft 40 via a first planetary gear set 80. The first planetary gear set 80 enables the transmission connection between the first output shaft of engine 10, the first motor 20, and the first intermediate shaft 40. The power output from the first output shaft of engine 10 and the power output from the second output shaft of first motor 20 can act on the first intermediate shaft 40 through the first planetary gear set 80. In other words, the first planetary gear set 80 enables power coupling between engine 10 and first motor 20. The first planetary gear set 80 also enables the decoupling of the speed and torque of the first output shaft of engine 10, which is beneficial for engine 10 to operate in a high-efficiency speed range and for reducing fuel consumption. The arrangement of the first planetary gear set 80 also facilitates the alignment of the second output shaft of first motor 20 with the axis of first intermediate shaft 40, improving the structural compactness of the hybrid drive system provided in this application.

[0038] In one embodiment, see [reference] Figure 1 and Figure 2 The second motor 30 may include a third output shaft extending along a second direction. The hybrid drive system may also include a second planetary gear set 90, which may include a second sun gear 91, second planet gears 92 externally meshed with the second sun gear 91, a second planet carrier 93 connected to the second planet gears 92, and a second ring gear 94 internally meshed with the second planet gears 92. The second sun gear 91 may be connected to the third output shaft of the second motor 30, the second ring gear 94 may be connected to the housing of the hybrid drive system, and the second planet carrier 93 may be connected to the end of the first intermediate shaft 40 away from the first ring gear 94. Since the third output shaft of the second motor 30 can drive the second sun gear 91 to rotate, the second sun gear 91 can drive the second planet gear 92 to rotate. The second ring gear 94 is connected to the housing of the hybrid drive system, meaning the second ring gear 94 does not rotate, but the second planet gear 92 can drive the second planet carrier 93 to rotate. This allows the power output by the second motor 30 to be applied to the first intermediate shaft 40, which is beneficial for achieving power coupling between the engine 10, the first motor 20, and the second motor 30 on the first intermediate shaft 40.

[0039] The third output shaft of the second motor 30 is connected to the first intermediate shaft 40 via the second planetary gear set 90. The second planetary gear set 90 enables the transmission connection between the second motor 30 and the first intermediate shaft 40. The power output from the third output shaft of the second motor 30 can act on the first intermediate shaft 40 through the second planetary gear set 90. This facilitates the power output from the first output shaft of the engine 10, the second output shaft of the first motor 20, and the third output shaft of the second motor 30 all acting on the first intermediate shaft 40, achieving power coupling between the engine 10, the first motor 20, and the second motor 30 on the first intermediate shaft 40. The arrangement of the second planetary gear set 90 also facilitates the alignment of the third output shaft of the second motor 30 with the axis of the first intermediate shaft 40, thereby ensuring the alignment of the axes of the second output shaft of the first motor 20, the first intermediate shaft 40, and the third output shaft of the second motor 30. This improves the structural compactness of the hybrid drive system provided in this application and optimizes the overall vehicle layout. The arrangement of the first planetary gear set 80 and the second planetary gear set 90 enables the hybrid drive system to achieve three driving modes: pure electric drive, pure engine drive, and hybrid drive, thus adapting to different operating conditions of the vehicle.

[0040] In one embodiment, see [reference] Figure 1 and Figure 2 The hybrid drive system may also include a bevel gear set 70, which may include a bevel drive gear 71 and a bevel driven gear 72 meshing with each other. The bevel drive gear 71 may be located on the first output shaft of the engine 10, and the bevel driven gear 72 may be located in the second direction and may be connected to the first planet carrier 83 of the first planetary gear set 80.

[0041] Since the conical drive wheel 71 is located on the first output shaft of the engine 10 and the conical driven wheel 72 is arranged along the second direction, the power output from the first output shaft of the engine 10 can be transmitted in the second direction. That is, the first output shaft of the engine 10 can drive the rotation of the conical drive wheel 71, thereby driving the rotation of the conical driven wheel 72 meshing with the conical drive wheel 71. The conical driven wheel 72 is connected to the first planetary carrier 83 of the first planetary gear set 80, and the first ring gear 84 of the first planetary gear set 80 is connected to the first intermediate shaft 40. Thus, the power output of the engine 10 in the first direction can be applied to the first intermediate shaft 40 extending along the second direction, which is beneficial to optimizing the overall vehicle layout.

[0042] In the above embodiments, see Figure 1 and Figure 2 The angle between the axis of the conical driving wheel 71 and the axis of the conical driven wheel 72 can be 90°, and the first direction can be perpendicular to the second direction.

[0043] In one embodiment, see [reference] Figures 1 to 3The hybrid drive system may further include a second intermediate shaft 50 and a reduction mechanism. The second intermediate shaft 50 is used to connect to the wheels 3. The reduction mechanism may include a first-stage reduction mechanism 100, which may be disposed between the first intermediate shaft 40 and the second intermediate shaft 50. The first-stage reduction mechanism 100 is used to transmit the power applied to the first intermediate shaft 40 by the power assembly to the second intermediate shaft 50 to drive the wheels 3 to rotate. Because the first-stage reduction mechanism 100 is disposed between the first intermediate shaft 40 and the second intermediate shaft 50, it is possible to reduce speed after the power of the engine 10, the first motor 20, and the second motor 30 converges, and then transmit the power to the second intermediate shaft 50.

[0044] In one embodiment, see [reference] Figures 1 to 3 The first-stage reduction mechanism 100 may include a first-gear transmission mechanism 110 and a second-gear transmission mechanism 120. The hybrid drive system may also include a shift element 1 disposed on the second intermediate shaft 50. The hybrid drive system may have a first-gear transmission state and a second-gear transmission state. When the hybrid drive system is in the first-gear transmission state, the shift element 1 may connect the first-gear transmission mechanism 110 and the second intermediate shaft 50. When the hybrid drive system is in the second-gear transmission state, the shift element 1 may connect the second-gear transmission mechanism 120 and the second intermediate shaft 50.

[0045] Since the first-stage reduction mechanism 100 is located between the first intermediate shaft 40 and the second intermediate shaft 50, the first-stage reduction mechanism 100 includes a first-speed transmission mechanism 110 and a second-speed transmission mechanism 120. The shifting element 1 can switch between the first-speed transmission state and the second-speed transmission state of the hybrid drive system. The power of the engine 10, the first motor 20 and the second motor 30 converges at the first intermediate shaft 40 and can perform two-speed shifting, thereby adjusting the vehicle speed, torque, etc., which is beneficial to meeting the power and economic requirements of the vehicle and to meeting the vehicle's power performance indicators (including maximum speed, acceleration capability and maximum gradeability, etc.).

[0046] In addition, the first-stage reduction mechanism 100 is disposed between the first intermediate shaft 40 and the second intermediate shaft 50. The rotational speed of the first intermediate shaft 40 is reduced by the first-stage reduction mechanism 100 and then transmitted to the second intermediate shaft 50. The shifting element 1 is disposed on the second intermediate shaft 50, which helps to improve the safety and smoothness of shifting.

[0047] This application does not limit the specific selection of the shift element 1. The shift element 1 can be a shift synchronizer, a meshing sleeve, etc. In one embodiment, the shift element 1 can be a meshing sleeve. A first external spline can be provided on the second intermediate shaft 50. The meshing sleeve has a first internal spline that mates with the first external spline. The meshing sleeve and the second intermediate shaft 50 can slide together, so that the meshing sleeve can be connected to the first gear transmission mechanism 110 or the second gear transmission mechanism 120 to realize the switching of the transmission state of the hybrid drive system.

[0048] In one embodiment, see [reference] Figures 1 to 3 The first gear transmission mechanism 110 may include a first gear set, which may include a first driving gear 111 and a first driven gear 112 meshing with each other. The first driving gear 111 may be connected to the first intermediate shaft 40, and the first driven gear 112 may be connected to the second intermediate shaft 50. The second gear transmission mechanism 120 may include a second gear set, which may include a second driving gear 121 and a second driven gear 122 meshing with each other. The second driving gear 121 may be connected to the first intermediate shaft 40, and the second driven gear 122 may be connected to the second intermediate shaft 50, thereby realizing the first stage of deceleration of the hybrid drive system.

[0049] Specifically, the first driven wheel 112 and the second driven wheel 122 can be supported on the second intermediate shaft 50 by needle roller bearings, respectively. The first driven wheel 112 can have a second internal spline, and the second driven wheel 122 can have a third internal spline. The two ends of the engagement sleeve can have a second external spline and a third external spline, respectively. When the engagement sleeve slides on the second intermediate shaft 50, the second external spline of the engagement sleeve can engage or disengage with the second internal spline of the first driven wheel 112, and the third external spline of the engagement sleeve can engage or disengage with the third internal spline of the second driven wheel 122. When the engagement sleeve disengages from the first driven wheel 112, the first driven wheel 112 rotates freely on the second intermediate shaft 50. When the engagement sleeve disengages from the second driven wheel 122, the second driven wheel 122 rotates freely on the second intermediate shaft 50.

[0050] In one embodiment, see [reference] Figure 1 and Figure 3 The reduction mechanism may also include a second-stage reduction mechanism 200, and the hybrid drive system may also include a differential 60 for connection with the wheel 3. The second-stage reduction mechanism 200 may be disposed between the second intermediate shaft 50 and the differential 60. The second-stage reduction mechanism 200 is used to transmit the power applied to the second intermediate shaft 50 by the power component to the differential 60 to drive the wheel 3 to rotate.

[0051] Because the hybrid drive system has a two-stage reduction mechanism, it is beneficial for the first motor 20 and the second motor 30 to operate in a high-efficiency speed range, which helps to reduce losses and increase the vehicle's driving range.

[0052] In one embodiment, the hybrid drive system may also be provided with a wheel-side reduction mechanism, which helps to improve the driving force of the vehicle and meet or correct the force matching of the entire transmission system.

[0053] In one embodiment, see [reference] Figure 1 and Figure 3 The second-stage reduction mechanism 200 may include a third gear set, which may include a third driving gear 210 and a third driven gear 220 that mesh with each other. The third driving gear 210 may be connected to the second intermediate shaft 50, and the third driven gear 220 may be connected to the differential 60, thereby realizing the second-stage reduction of the hybrid drive system.

[0054] In one embodiment, see [reference] Figure 1 and Figure 4 The differential 60 may include a differential housing 61, a half-shaft gear 64 disposed within the differential housing 61, and a differential lock 62 disposed on the differential housing 61. The differential housing 61 may be connected to the third driven wheel 220. The half-shaft gear 64 is used to connect to the half-shaft 2 of the vehicle. The differential lock 62 is used to lock the half-shaft 2 and the differential housing 61 when the wheel 3 slips, thereby allowing the power of the hybrid drive system to be output to the other wheel 3, which is beneficial for the vehicle to get out of trouble.

[0055] In one embodiment, the differential 60 may further include a planetary gear 63. The third driven wheel 220 can transmit power to the differential housing 61, which can transmit power to the planetary gear 63, which can transmit power to the half-shaft gear 64, which can transmit power to the half-shaft 2 of the vehicle. Since the end of the half-shaft 2 is provided with a wheel 3, it can drive the rotation of the wheel 3.

[0056] A vehicle includes a half-shaft 2, a wheel 3 connected to the half-shaft 2, and the aforementioned hybrid drive system, wherein a first intermediate shaft 40 of the hybrid drive system is used to drive the half-shaft 2 to rotate, thereby driving the wheel 3 to rotate.

[0057] It is understood that the hybrid drive system provided in this application may have drive modes including pure electric drive, pure engine drive, and hybrid drive. In pure electric drive mode, the first motor 20 can drive the first sun gear 81 of the first planetary gear set 80 to rotate, thereby applying the power output by the first motor 20 to the first intermediate shaft 40. The second motor 30 can drive the second sun gear 91 of the second planetary gear set 90 to rotate, thereby applying the power output by the second motor 30 to the first intermediate shaft 40, thus enabling power coupling between the first motor 20 and the second motor 30 on the first intermediate shaft 40. In this driving mode, the hybrid drive system may also include a locking structure on the first output shaft of the engine 10, thereby reducing the possibility of the first output shaft of the engine 10 reversing under the drive of the first motor 20 and / or the second motor 30, which helps protect the engine 10. In pure engine drive mode, the engine 10 can drive the conical drive wheel 71 to rotate, which in turn drives the conical driven wheel 72 to rotate, so that the power output by the engine 10 can act on the first intermediate shaft 40. In hybrid drive mode, the engine 10 can drive the conical drive wheel 71 to rotate, the first motor 20 can drive the first sun gear 81 of the first planetary gear set 80 to rotate, and the second motor 30 can drive the second sun gear 91 of the second planetary gear set 90 to rotate, thereby realizing the power convergence of the engine 10, the first motor 20, and the second motor 30 on the first intermediate shaft 40, which helps to provide greater driving force for the vehicle to adapt to different driving conditions.

[0058] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0059] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A hybrid drive system characterized by comprising: The hybrid drive system comprises a power assembly and a first intermediate shaft for connecting with wheels of a vehicle, the power assembly comprises an engine, a first motor and a second motor, the engine comprises a first output shaft extending in a first direction, the first motor, the first intermediate shaft and the second motor are arranged in a second direction, the first output shaft of the engine, the first motor and the second motor are respectively in driving connection with the first intermediate shaft to drive the wheels to rotate; Wherein, the first direction and the second direction intersect with each other, the first direction is the length direction of the vehicle, and the second direction is the width direction of the vehicle; The hybrid drive system further comprises a first planetary gear set and a second planetary gear set, the first planetary gear set can realize the driving connection of the first output shaft of the engine, the first motor and the first intermediate shaft; the second planetary gear set can realize the driving connection of the second motor and the first intermediate shaft, so that the axes of the second output shaft of the first motor, the first intermediate shaft and the third output shaft of the second motor coincide; The hybrid drive system further comprises a bevel gear set, the bevel gear set comprises a bevel driving gear and a bevel driven gear which are in mesh with each other, the bevel driving gear is arranged on the first output shaft of the engine, and the bevel driven gear is arranged in the second direction and in driving connection with the first planetary gear set; The first motor comprises a second output shaft extending in the second direction, the first planetary gear set comprises a first sun gear, a first planetary gear in outer meshing with the first sun gear, a first planetary carrier connected with the first planetary gear, and a first ring gear in inner meshing with the first planetary gear, the first sun gear is connected with the second output shaft of the first motor, the first planetary carrier is connected with the engine, and the first ring gear is connected with the first intermediate shaft; The second motor comprises a third output shaft extending in the second direction, the second planetary gear set comprises a second sun gear, a second planetary gear in outer meshing with the second sun gear, a second planetary carrier connected with the second planetary gear, and a second ring gear in inner meshing with the second planetary gear, the second sun gear is connected with the third output shaft of the second motor, the second ring gear is used for connecting with a housing of the hybrid drive system, and the second planetary carrier is connected with the first intermediate shaft away from the first ring gear.

2. The hybrid drive system of claim 1, wherein The bevel driven gear is connected with the first planetary carrier of the first planetary gear set.

3. The hybrid drive system according to any one of claims 1-2, characterized by, The hybrid drive system further comprises a second intermediate shaft for connecting with the wheels and a reduction mechanism, the reduction mechanism comprises a first-stage reduction mechanism arranged between the first intermediate shaft and the second intermediate shaft, and the first-stage reduction mechanism is used for transmitting the power of the power assembly acting on the first intermediate shaft to the second intermediate shaft to drive the wheels to rotate.

4. The hybrid drive system of claim 3, wherein The first-stage reduction mechanism comprises a one-gear transmission mechanism and a two-gear transmission mechanism, and the hybrid drive system further comprises a shift element arranged on the second intermediate shaft. The hybrid drive system has a one-gear transmission state and a two-gear transmission state, when the hybrid drive system is in the one-gear transmission state, the shift element connects the one-gear transmission mechanism and the second intermediate shaft, when the hybrid drive system is in the two-gear transmission state, the shift element connects the two-gear transmission mechanism and the second intermediate shaft.

5. The hybrid drive system of claim 4, wherein, The one-gear transmission mechanism comprises a first gear set, the first gear set comprises a first driving wheel and a first driven wheel which are engaged with each other, the first driving wheel is connected with the first intermediate shaft, and the first driven wheel is connected with the second intermediate shaft. The two-gear transmission mechanism comprises a second gear set, the second gear set comprises a second driving wheel and a second driven wheel which are engaged with each other, the second driving wheel is connected with the first intermediate shaft, and the second driven wheel is connected with the second intermediate shaft.

6. The hybrid drive system of claim 3, wherein The reduction mechanism further comprises a second-stage reduction mechanism, the hybrid drive system further comprises a differential which is used to be connected with the wheels, the second-stage reduction mechanism is arranged between the second intermediate shaft and the differential, and the second-stage reduction mechanism is used to transmit the power of the power assembly acting on the second intermediate shaft to the differential, so as to drive the wheels to rotate. The second-stage reduction mechanism comprises a third gear set, the third gear set comprises a third driving wheel and a third driven wheel which are engaged with each other, the third driving wheel is connected with the second intermediate shaft, and the third driven wheel is connected with the differential.

7. The hybrid drive system of claim 6, wherein The differential comprises a differential housing, a half shaft gear arranged in the differential housing, and a differential lock arranged on the differential housing, the differential housing is connected with the third driven wheel, the half shaft gear is used to be connected with a half shaft of the vehicle, and the differential lock is used to lock the half shaft and the differential housing when the wheels slip.

8. A vehicle characterized by comprising: The hybrid drive system comprises a half shaft, a wheel connected with the half shaft, and a hybrid drive system as claimed in any one of claims 1-7, the first intermediate shaft of the hybrid drive system is used to drive the half shaft to rotate, so as to drive the wheel to rotate.

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