Two-gear planet row hybrid transmission, hybrid power assembly and vehicle

Abstract

The invention provides a two-gear planet row hybrid transmission, a hybrid power assembly and a vehicle. The two-gear planet row hybrid transmission comprises a power input unit, a power output unit, a planet row and a power switching device. The axial direction of the planet row is arranged in the front-back direction of a vehicle, a gear ring of the planet row is fixedly arranged on a transmission shell, one of the power input unit and the power output unit is in transmission connection with a sun gear of the planet row, and the other one of the power input unit and the power output unit is selectively connected with the sun gear or a planet carrier of the planet row through a power switching device. According to the two-gear planet row hybrid transmission, through different power transmission paths of the planet rows, a compact two-gear speed change structure is formed in the transmission; meanwhile, the axial direction of the planet row is arranged in the front-back direction of the vehicle, the space occupied by a power system in the width direction in a vehicle cabin can be effectively saved, and overall space arrangement and design in the vehicle cabin are facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of new energy vehicles, and in particular to a two-speed planetary hybrid transmission. In addition, the present invention also relates to a hybrid powertrain and a vehicle. Background Art

[0002] Vehicles powered by fuel engines cause a lot of air pollution, so people have developed pure electric vehicles. However, due to factors such as battery performance and vehicle mileage, the development of pure electric vehicles has been greatly restricted. In view of this, hybrid vehicles are developing rapidly because they can better solve the above problems. A hybrid vehicle is a vehicle that uses multiple energy sources, usually a conventional engine that uses liquid fuel and an electric motor that uses electrical energy to drive the vehicle.

[0003] In existing hybrid vehicles, the hybrid transmission needs to be connected to the engine and the motor at the same time, and connected to the front or rear axle drive of the vehicle. The power of the engine is generally connected to the single shaft and the dual shaft through a dual clutch, part of the power is output by the single shaft, and part of the power is output by the dual shaft. The power output of the matching motor also needs to be transmitted to the single shaft or the dual shaft. In order to realize the four-wheel drive function of the vehicle, it is generally equipped with multiple motors or a complex transmission structure, resulting in the power system occupying a large space.

[0004] When the entire power system is applied to a vehicle, due to the setting of multiple drive components and multiple sets of speed transmission mechanisms, the hybrid transmission, engine and motor need to occupy a large amount of space in the vehicle cabin. Due to the complexity of the structure and the diversity of the transmission paths, the entire hybrid transmission system occupies a large space in the front and rear and left and right directions of the vehicle, while the space inside the vehicle cabin is limited, and air-conditioning systems, batteries, shock absorbers and other components need to be arranged.

[0005] Moreover, existing hybrid transmissions mostly use a gear set transmission form, especially in a multi-speed transmission structure, which requires multiple sets of transmission gears. This makes the overall setting of the transmission structure more complicated and requires a larger layout space, which further increases the difficulty of arranging the power system in the cabin. Summary of the invention

[0006] In view of this, the present invention aims to propose a two-speed planetary hybrid transmission, so as to provide a two-speed hybrid transmission mechanism with a compact structure and convenient space arrangement.

[0007] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0008] A two-speed planetary gear hybrid transmission, comprising a power input unit, a power output unit, a planetary gear and a power switching device; the axial direction of the planetary gear is arranged along the front-rear direction of a vehicle, the ring gear of the planetary gear is fixed on the transmission housing, one of the power input unit and the power output unit is transmission-connected to the sun gear of the planetary gear, and the other can be selectively connected to the sun gear or the planetary carrier of the planetary gear through the power switching device.

[0009] Furthermore, the power input unit includes an input shaft arranged along the front-rear direction of the vehicle, and the power switching device includes a first clutch and a second clutch provided on the input shaft; the first clutch can selectively engage the planetary carrier, and the second clutch can selectively engage the sun gear.

[0010] Furthermore, the power output unit includes an intermediate shaft and an output shaft which are arranged in parallel along the front-rear direction of the vehicle, the sun gear is arranged on the intermediate shaft, and the output shaft is transmission-connected to the intermediate shaft.

[0011] Furthermore, the output shaft and the intermediate shaft are connected via a gear set.

[0012] Furthermore, the output shaft is provided with a first gear set for transmission connection to the first motor; and / or, the input shaft is provided with a second gear set for transmission connection to the second motor.

[0013] Furthermore, the input shaft is connected to the power output shaft of the engine through a third clutch.

[0014] Furthermore, the input shaft is provided with a first gear set for transmission connection to the first motor.

[0015] Compared with the prior art, the present invention has the following advantages:

[0016] The two-speed planetary gear hybrid transmission of the present invention forms a compact two-speed transmission structure in the transmission through two different power transmission paths in the planetary gear, namely, driving the sun gear through the planet carrier and directly driving the sun gear.

[0017] At the same time, if the axial direction of the planetary gear is arranged along the front-to-back direction of the vehicle, then all the shafts in the transmission will be arranged longitudinally accordingly, and driving components such as the engine and motor will also be arranged in the front-to-back direction of the transmission, making full use of the relatively abundant space dimensions in the front-to-back direction of the vehicle, which can effectively save the space occupied by the power system in the width direction of the vehicle cabin, thereby optimizing the spatial layout conditions of the power system in the vehicle cabin, which is beneficial to the overall spatial layout and design inside the vehicle cabin.

[0018] Another object of the present invention is to provide a hybrid powertrain, comprising an engine, a first motor, and the two-speed planetary gearbox of the present invention; the engine is drivingly connected to the power input unit, and the first motor is drivingly connected to the power input unit or the power output unit. The hybrid powertrain of the present invention has the technical advantages of the two-speed planetary gearbox.

[0019] In addition, the present invention also proposes a vehicle, which is provided with the hybrid powertrain and auxiliary power system described in the present invention, and the hybrid powertrain and the auxiliary power system can interchangeably drive the wheels of the front axle and the rear axle of the vehicle respectively.

[0020] Furthermore, the auxiliary power system includes an auxiliary drive motor, which is directly arranged on or transmission-connected to the drive shaft of the wheel; or, the auxiliary power system has two auxiliary drive motors, which are respectively arranged corresponding to the drive shafts of the wheels on the left and right sides, and the two auxiliary drive motors are respectively directly arranged on or transmission-connected to the drive shafts on the corresponding sides.

[0021] The vehicle of the present invention has the technical advantages of the above-mentioned hybrid powertrain, and also has good four-wheel drive performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings, which constitute part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention. The directional terms such as front and back, up and down, etc. involved therein are only used to indicate relative positional relationships and do not constitute improper limitations on the present invention. In the accompanying drawings:

[0023] Figure 1 A schematic diagram of the system structure of a two-speed planetary hybrid transmission and a hybrid power assembly thereof according to the first embodiment of the present invention;

[0024] Figure 2 A schematic diagram of another system configuration of a hybrid powertrain according to the first embodiment of the present invention;

[0025] Figure 3 A schematic diagram of a power transmission path of a hybrid powertrain assembly in a direct drive mode of engine gear I according to Embodiment 1 of the present invention;

[0026] Figure 4 A schematic diagram of a power transmission path of a hybrid powertrain assembly in a direct drive mode of engine II gear according to Embodiment 1 of the present invention;

[0027] Figure 5 A schematic diagram of a power transmission path of a hybrid powertrain in series mode according to the first embodiment of the present invention;

[0028] Figure 6 A schematic diagram of a power transmission path of a hybrid powertrain in a hybrid mode according to a first embodiment of the present invention;

[0029] Figure 7 It is a structural schematic diagram of a single motor configuration of an auxiliary power system of a vehicle according to a second embodiment of the present invention;

[0030] Figure 8 It is a structural schematic diagram of another single motor configuration of the auxiliary power system according to the second embodiment of the present invention;

[0031] Fig. 9 It is a structural schematic diagram of another single motor configuration of the auxiliary power system according to the second embodiment of the present invention;

[0032] Fig.10 It is a structural schematic diagram of a dual-motor configuration of an auxiliary power system according to a second embodiment of the present invention;

[0033] Fig.11 It is a structural schematic diagram of another dual-motor configuration of the auxiliary power system according to the second embodiment of the present invention;

[0034] Fig.12 It is a structural schematic diagram of another dual-motor configuration of the auxiliary power system according to the second embodiment of the present invention;

[0035] Fig.13 It is a structural schematic diagram of another dual-motor configuration of the auxiliary power system according to the second embodiment of the present invention;

[0036] Fig.14 It is a structural schematic diagram of another dual-motor configuration of the auxiliary power system according to the second embodiment of the present invention;

[0037] Fig.15 This is a structural schematic diagram of another dual-motor configuration of the auxiliary power system described in the second embodiment of the present invention.

[0038] Description of reference numerals:

[0039] 1. Engine; 10. Power output shaft; 100. Input shaft;

[0040] 21. first motor; 210. first gear set; 22. second motor; 220. second gear set;

[0041] 31. First clutch; 32. Second clutch; 33. Third clutch;

[0042] 4. Intermediate shaft; 400. Driving gear; 5. Output shaft; 500. Driven gear;

[0043] 6. Battery pack; 70. Sun gear; 71. Planet carrier; 711. Planet gear; 72. Ring gear;

[0044] 8. Auxiliary drive motor; 800. Auxiliary intermediate shaft; 81. Motor shaft gear; 811. First motor shaft gear; 812. Second motor shaft gear;

[0045] 82, driving shaft gear; 821, first driving shaft gear; 822, second driving shaft gear;

[0046] 831, first intermediate shaft gear; 832, second intermediate shaft gear; 833, third intermediate shaft gear;

[0047] 841, parallel synchronizer; 842, gear shift synchronizer; 85, auxiliary differential;

[0048] 9. Wheel; 90. Drive shaft; 91. Differential. DETAILED DESCRIPTION

[0049] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0050] In the description of the present invention, it should be stated that if terms indicating directions or positional relationships such as "up, down, left, right, front, back, inside, outside" appear, they are based on the directions or positional relationships shown in the drawings and are only for the convenience of describing the present invention. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed or operate in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0051] In addition, in the description of the present invention, unless otherwise clearly defined, the terms "installed", "connected", "connection", and "connector" should be understood in a broad sense. For example, the connection can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, an indirect connection through an intermediate medium, or a connection between the two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in combination with specific circumstances. The limiting terms such as "first, second, A, B, C, D" that appear in the description of the present invention are only for distinguishing similar features of different positions, affiliations or uses, so as to achieve the purpose of avoiding ambiguity and confusion in the description, and cannot be understood as indicating or implying relative importance.

[0052] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0053] Embodiment 1

[0054] This embodiment relates to a two-speed planetary hybrid transmission and a hybrid powertrain. The hybrid powertrain includes an engine 1, a first motor 21, and a two-speed planetary hybrid transmission of this embodiment; the two-speed planetary hybrid transmission is arranged between the engine 1, the first motor 21 and the differential 91 of the vehicle, which can provide favorable conditions for the efficient operation of the engine 1 and provide a two-speed hybrid transmission mechanism with a compact structure and convenient space arrangement. An exemplary system structure of the hybrid powertrain of this embodiment is as follows Figure 1 or Figure 2 shown.

[0055] In general, the two-speed planetary gear hybrid transmission includes a power input unit, a power output unit, a planetary gear and a power switching device. The axial direction of the planetary gear is arranged along the front-rear direction of the vehicle, the ring gear 72 of the planetary gear is fixed on the transmission housing, one of the power input unit and the power output unit is connected to the sun gear 70 of the planetary gear, and the other can be selectively connected to the sun gear 70 or the planetary carrier 71 of the planetary gear through the power switching device. The above-mentioned engine 1 is connected to the power input unit, and the first motor 21 is connected to the power input unit or the power output unit.

[0056] There are of course many options for the specific arrangement of the power input unit and the power output unit, and the configuration of the planetary gear between the power input unit and the power output unit. For example, the sun gear 70 of the planetary gear can be fixedly connected to the power input unit, and the planetary carrier 71 can be connected to the power output unit; or, the sun gear 70 can be fixedly connected to the power output unit, and the planetary carrier 71 can be connected to the power input unit. In this embodiment, the power input unit includes an input shaft 100 arranged along the front-rear direction of the vehicle, and the power switching device includes a first clutch 31 and a second clutch 32 provided on the input shaft 100; the first clutch 31 can selectively engage the planetary carrier 71, and the second clutch 32 can selectively engage the sun gear 70.

[0057] The power input unit adopts the form of a longitudinally arranged input shaft 100, which is not only convenient for connecting the power output shaft 10 of the engine 1 to the input shaft 100 (the power output shaft 10 and the input shaft 100 can be directly fixedly connected as one, or a power switching device can be set between the power output shaft 10 and the input shaft 100, so as to disconnect the engine 1 from the power system when the vehicle is driven in pure electric mode) to accept external power input; and it is also convenient to configure a power switching device for switching the power transmission path between the input shaft 100 and the planetary gear. In this embodiment, the first clutch 31 and the second clutch 32 are used between the input shaft 100 and the planetary gear to respectively realize the engagement and disconnection control between the input shaft 100 and the planetary carrier 71, and the input shaft 100 and the sun gear 70, which not only has reliable control performance and is easy to configure, but also, during the power switching process, the disengagement and engagement of the clutch plate is a gradual process, which can prevent the interruption of power transmission and ensure the power output stability of the transmission.

[0058] The power output unit of this embodiment includes an intermediate shaft 4 and an output shaft 5 arranged in parallel along the front-rear direction of the vehicle, a sun gear 70 is arranged on the intermediate shaft 4, and the output shaft 5 is connected to the intermediate shaft 4 in a transmission manner. The parallel intermediate shaft 4 and output shaft 5 are arranged in the power output unit, which is beneficial to the overall transmission structure arrangement of the transmission. Among them, the fixed connection and assembly operation between the intermediate shaft 4 and the sun gear 70 will be more convenient, and the output shaft 5 is also convenient to be arranged corresponding to the power output object of the transmission (the differential 91 on the driving shaft 90 of the wheel 9). Moreover, in the transmission connection structure between the output shaft 5 and the intermediate shaft 4, it is also convenient to realize the required speed change configuration.

[0059] Preferably, the output shaft 5 and the intermediate shaft 4 are connected to each other through a gear set. The intermediate shaft 4 and the output shaft 5 are connected to each other through a gear set. The gear transmission can not only obtain the required transmission ratio by setting the appropriate gear size and number of teeth, but also has reliable transmission performance and high transmission efficiency. In this embodiment, a driving gear 400 is fixed on the intermediate shaft 4, and a driven gear 500 is fixed on the output shaft 5. The driving gear 400 and the driven gear 500 are meshed and connected to form a transmission gear set between the intermediate shaft 4 and the output shaft 5.

[0060] In addition, if Figure 1As shown, a first gear set 210 for transmission connection with the first motor 21 can be provided on the output shaft 5; and a second gear set 220 for transmission connection with the second motor 22 can also be provided on the input shaft 100. By providing the first gear set 210 on the output shaft 5, the first motor 21 can be configured outside the transmission, and the first motor 21 is used as a driving motor, so that the transmission has two power input modes of the engine 1 and the motor, thereby forming a hybrid transmission system; a second gear set 220 is provided on the intermediate shaft 4, which can be transmission connected with the second motor 22, and the second motor 22 can generate electricity driven by the engine 1 as a generator to replenish the battery pack 6 of the vehicle. The first motor 21 and the second motor 22 are respectively connected to the output shaft 5 and the intermediate shaft 4 by gear transmission, which has the characteristics of reliable transmission performance and small mechanical loss; and the required transmission ratio can be obtained by setting a suitable gear size and number of teeth.

[0061] Of course, in addition to using Figure 1 In addition to the configuration shown, you can also use Figure 2 The configuration shown is that the input shaft 100 is connected to the power output shaft 10 of the engine 1 through the third clutch 33. The input shaft 100 is provided with a first gear set 210 for transmission connection with the first motor 21.

[0062] As mentioned above, between the input shaft 100 and the power output shaft 10, a Figure 2 The configuration shown is connected by the third clutch 33, which is convenient for flexibly controlling the power on and off between the power output shaft 10 and the input shaft 100. The clutch is used as a power switching device, which has the advantages of mature and reliable technology and easy configuration, and can well realize the power on and off control between the power output shaft 10 and the input shaft 100.

[0063] Based on the setting of the third clutch 33, Figure 2 As shown, the two-speed planetary hybrid transmission of this embodiment can omit the configuration of the second motor 22, and the first motor 21 is connected to the input shaft 100 through the first gear set 210. In this way, the first motor 21, as the P2 motor, can be used as a generator or a drive motor.

[0064] Through the above configuration, the hybrid powertrain of this embodiment can operate in a variety of driving modes, such as pure electric mode, engine I gear direct drive mode, engine II gear direct drive mode, hybrid mode, energy recovery mode, etc., to cooperate with the engine 1 and the first motor 21 to drive the vehicle.

[0065] Specifically, in the engine Ⅰ gear direct drive mode, if Figure 3As shown, the first clutch 31 engages the planet carrier 71, the engine 1 is running, and the power output from the power output shaft 10 reaches the planet carrier 71 through the input shaft 100 and the first clutch 31. Under the coupling transmission of the planetary gear 711 of the planetary gear row, the planetary gear 711 drives the sun gear 70 to rotate, and then the power passes through the intermediate shaft 4, the driving gear 400, the driven gear 500 and the output shaft 5, and reaches the differential 91 and the drive shaft 90 to drive the wheels 9 to rotate, thereby driving the vehicle to move. At this moment, the first motor 21 is not running, and the vehicle is driven only by the engine 1.

[0066] In the engine Ⅱ gear direct drive mode, if Figure 4 As shown, the second clutch 32 engages the sun gear 70, the engine 1 is running, and the power output by the power output shaft 10 directly reaches the sun gear 70 through the input shaft 100 and the second clutch 32, and then the power passes from the sun gear 70 through the intermediate shaft 4, the driving gear 400, the driven gear 500 and the output shaft 5 to the differential 91 and the drive shaft 90 to drive the wheels 9 to rotate, thereby driving the vehicle to move. At this moment, the first motor 21 is not running, and the vehicle is driven only by the engine 1 to move.

[0067] In series mode, if Figure 5 As shown, the first clutch 31 and the second clutch 32 are both in the disconnected state, the engine 1 is running, and the power output from the power output shaft 10 drives the second motor 22 to run and generate electricity through the input shaft 100 and the second gear set 220, replenishing the battery pack 6 of the vehicle. At the same time, the battery pack 6 supplies power to the first motor 21, the first motor 21 runs and drives the output shaft 5 to rotate through the first gear set 210, and the power is then passed from the output shaft 5 through the differential 91 and the drive shaft 90 in sequence to drive the wheels 9 to rotate, thereby driving the vehicle to move. This mode is equivalent to the operation mode of the extended-range vehicle.

[0068] In hybrid mode, Figure 6As shown, the first clutch 31 is controlled to engage the planetary carrier 71, or the second clutch 32 is controlled to engage the sun gear 70, the engine 1 is running, and the power output by the power output shaft 10 drives the input shaft 100 to rotate, and then finally drives the sun gear 70 to rotate through the first clutch 31 or the second clutch 32; then the power passes from the sun gear 70 through the intermediate shaft 4, the driving gear 400 and the driven gear 500 to the output shaft 5. At the same time, the battery pack 6 supplies power to the first motor 21, and the first motor 21 runs and drives the output shaft 5 to rotate through the first gear set 210. At this moment, the engine 1 and the first motor 21 are both running, and jointly drive the output shaft 5 to rotate. At the same time, in addition to partially driving the planetary gear, the power on the input shaft 100 can also partially drive the second motor 22 to generate electricity. The rotating output shaft 5 passes through the differential 91 and the drive shaft 90 in turn, driving the wheels 9 to rotate, thereby driving the vehicle to move. At this moment, the engine 1 and the first motor 21 jointly provide power for the vehicle to drive the vehicle to move.

[0069] The power transmission conditions in operating modes such as pure electric mode, idle power generation mode and energy recovery mode can be obtained by referring to the power transmission principles of the above-mentioned driving modes, which will not be repeated here.

[0070] To sum up, the two-speed planetary gear hybrid transmission and its hybrid power assembly of the present embodiment form a compact two-speed transmission structure in the transmission through two different power transmission paths in the planetary gear, namely, driving the sun gear 70 through the planetary carrier 71 and directly driving the sun gear 70; at the same time, the axial direction of the planetary gear is arranged along the front and rear direction of the vehicle, then each shaft in the transmission will adopt a longitudinal arrangement accordingly, and the driving components such as the engine 1 and the motor will also be arranged in the front and rear direction of the transmission, making full use of the relatively abundant space size in the front and rear direction of the vehicle, which can effectively save the space occupied by the power system in the width direction of the vehicle cabin, thereby optimizing the space arrangement conditions of the power system in the vehicle cabin, which is beneficial to the overall space arrangement and design inside the vehicle cabin.

[0071] Embodiment 2

[0072] This embodiment relates to a vehicle, which is provided with a hybrid powertrain and an auxiliary power system provided in the first embodiment. The hybrid powertrain is used as the main power system of the vehicle in conjunction with the auxiliary power system to interchangeably drive the front and rear axle wheels 9 of the vehicle. The various exemplary structures of the auxiliary power system are as follows: Figures 7 to 15 shown.

[0073] It should be noted that the hybrid powertrain and the auxiliary power system mentioned above can interchangeably drive the front axle and the rear axle wheels 9 of the vehicle respectively, which means that the hybrid powertrain can be used to drive the front axle and the auxiliary power system can be used to drive the rear axle; or the two can be swapped, with the hybrid powertrain being used to drive the rear axle and the auxiliary power system being used to drive the front axle. The vehicle of this embodiment has the technical advantages of the two-speed planetary gear and the hybrid powertrain mentioned above, and can also enable the vehicle to have the performance of four-wheel drive.

[0074] Furthermore, the auxiliary power system may be configured with only one motor or two motors; the motor configured in the auxiliary power system may be powered by the vehicle battery pack 6. When configured with one motor, the auxiliary power system includes an auxiliary drive motor 8 and an auxiliary differential 85 disposed between the drive shafts 90 of the left and right wheels 9, and the auxiliary drive motor 8 is connected to the auxiliary differential 85 directly or through a transmission mechanism having a plurality of gears.

[0075] When a secondary drive motor 8 is configured, Figure 7 As shown, the auxiliary drive motor 8 and the auxiliary differential 85 can be integrated, and the auxiliary drive motor 8 drives the auxiliary differential 85 to drive the drive shafts 90 on both sides to rotate. Fig.10 , Fig.11 As shown, the auxiliary drive motor 8 is connected to the auxiliary differential 85 between the two side drive shafts 90 through a set of speed change mechanisms. The specific configuration of the speed change mechanism can be flexibly set according to the transmission and speed change requirements between the auxiliary drive motor 8 and the wheels 9. The auxiliary power system adopts a driving mode of a single motor and an auxiliary differential 85, which has the advantages of simple structure, small number of motors, etc., and can reduce the configuration cost of the auxiliary power system.

[0076] For example, see Figure 8 A secondary intermediate shaft 800 is arranged between the motor shaft of the secondary drive motor 8 and the secondary differential 85, a motor shaft gear 81 is arranged on the motor shaft of the secondary drive motor 8, a first intermediate shaft gear 831 and a second intermediate shaft gear 832 are arranged at intervals on the secondary intermediate shaft 800, and a drive shaft gear 82 is arranged on the secondary differential 85; wherein, the motor shaft gear 81 is meshed and connected with the first intermediate shaft gear 831, and the second intermediate shaft gear 832 is meshed and connected with the drive shaft gear 82, forming a speed transmission path, which can achieve a stable speed transmission effect.

[0077] For example, you can refer to Fig. 9A secondary intermediate shaft 800 is arranged between the motor shaft of the secondary drive motor 8 and the secondary differential 85, a first motor shaft gear 811 and a second motor shaft gear 812 are arranged on the motor shaft of the secondary drive motor 8 at intervals, a first intermediate shaft gear 831, a second intermediate shaft gear 832 and a third intermediate shaft gear 833 are arranged on the secondary intermediate shaft 800 at intervals, and a driving shaft gear 82 is arranged on the secondary differential 85; wherein, the first motor shaft gear 811 is meshed and connected with the first intermediate shaft gear 831, the second motor shaft gear 812 is meshed and connected with the second intermediate shaft gear 832, and the third intermediate shaft gear 833 is meshed and connected with the driving shaft gear 82. At this moment, a gear shift synchronizer 842 is arranged on the secondary intermediate shaft 800 between the first intermediate shaft gear 831 and the second intermediate shaft gear 832, which can switch gears, form two speed transmission paths with different transmission ratios of the speed change mechanism, and can perform two-speed speed regulation drive on the wheels 9 to achieve a stable speed transmission effect.

[0078] When two auxiliary drive motors 8 are configured, the structure of the auxiliary power system of this embodiment is as follows: Figures 10 to 15 As shown, the auxiliary power system has two auxiliary drive motors 8, and the two auxiliary drive motors 8 are respectively arranged corresponding to the drive shafts 90 of the wheels 9 on the left and right sides. The two auxiliary drive motors 8 are respectively directly arranged on the drive shafts 90 on the corresponding sides, and a parallel synchronizer 841 is arranged between the two drive shafts 90. Alternatively, the two auxiliary drive motors 8 are respectively connected to the drive shafts 90 on the corresponding sides through a set of speed change mechanisms, and a parallel synchronizer 841 is arranged between the two sets of speed change mechanisms; the specific configuration of the speed change mechanism of each group and the setting position of the parallel synchronizer 841 can be flexibly arranged according to the transmission and speed change requirements between the auxiliary drive motors 8 and the wheels 9. The speed change mechanism can be set to a single gear, two gears or multiple gears according to the requirements of the gear change, and the switching between the gears is realized by the synchronizer.

[0079] For example, see Fig.10 , the auxiliary drive motor 8 is directly arranged on the drive shaft 90 on the corresponding side, and a parallel synchronizer 841 is arranged between the two drive shafts 90. Fig.13 A motor shaft gear 81 is provided on the motor shaft of the auxiliary drive motor 8, and a drive shaft gear 82 is provided on the drive shaft 90 on the corresponding side. The motor shaft gear 81 and the drive shaft gear 82 are meshed and transmitted to form a speed change mechanism; a parallel synchronizer 841 is provided between the two sets of speed change mechanisms. Of course, the parallel synchronizer 841 can be provided between the two drive shafts 90, or between the motor shafts of the two auxiliary drive motors 8.

[0080] For example, you can refer to Fig.12A secondary intermediate shaft 800 is arranged between the motor shaft of the secondary drive motor 8 and the drive shaft 90 on the corresponding side, a motor shaft gear 81 is arranged on the motor shaft of the secondary drive motor 8, a first intermediate shaft gear 831 and a second intermediate shaft gear 832 are arranged on the secondary intermediate shaft 800 at intervals, and a drive shaft gear 82 is arranged on the drive shaft 90; wherein the motor shaft gear 81 is meshed and connected with the first intermediate shaft gear 831, and the second intermediate shaft gear 832 is meshed and connected with the drive shaft gear 82, forming a speed transmission path, which can achieve a stable speed transmission effect. The parallel synchronizer 841 can be arranged at multiple positions on the two sets of speed change mechanisms, such as between the motor shafts of the two secondary drive motors 8 shown in the figure; of course, the parallel synchronizer 841 can also be arranged between the two drive shafts 90 or between the two secondary intermediate shafts 800.

[0081] or reference Fig.13 , the first motor shaft gear 811 and the second motor shaft gear 812 are arranged at intervals on the motor shaft of the auxiliary drive motor 8, and the first drive shaft gear 821 and the second drive shaft gear 822 are arranged at intervals on the corresponding side drive shaft 90. The first motor shaft gear 811 is meshed and connected with the first drive shaft gear 821, and the second motor shaft gear 812 is meshed and connected with the second drive shaft gear 822. The parallel synchronizer 841 is arranged between the motor shafts of the auxiliary drive motors 8 on both sides; of course, the parallel synchronizer 841 can also be arranged between the two drive shafts 90.

[0082] Or, refer to Fig.14 As shown, a secondary intermediate shaft 800 is added between the motor shaft of the secondary drive motor 8 and the corresponding drive shaft 90. The motor shaft of the secondary drive motor 8 is provided with a first motor shaft gear 811 and a second motor shaft gear 812 at intervals, the secondary intermediate shaft 800 is provided with a first intermediate shaft gear 831, a third intermediate shaft gear 833 and a second intermediate shaft gear 832 at intervals, and the drive shaft gear 82 is provided on the drive shaft 90. Among them, the first motor shaft gear 811 is meshed and connected with the first intermediate shaft gear 831, the second motor shaft gear 812 is meshed and connected with the second intermediate shaft gear 832, and the third intermediate shaft gear 833 is meshed and connected with the drive shaft gear 82; at the same time, a gear shift synchronizer 842 is provided on the secondary intermediate shaft 800 between the first intermediate shaft gear 831 and the second intermediate shaft gear 832, which can switch gears to form two speed transmission paths with different transmission ratios of the speed change mechanism. The parallel synchronizer 841 may be disposed between the drive shafts 90 on both sides; of course, the parallel synchronizer 841 may also be disposed between the motor shafts of the two auxiliary drive motors 8 or between the two auxiliary intermediate shafts 800 .

[0083] Or, refer to Fig.15As shown, a secondary intermediate shaft 800 is added between the motor shaft of the secondary drive motor 8 and the corresponding drive shaft 90. A motor shaft gear 81 is provided on the motor shaft of the secondary drive motor 8, a first intermediate shaft gear 831, a third intermediate shaft gear 833 and a second intermediate shaft gear 832 are arranged at intervals on the secondary intermediate shaft 800, and a first drive shaft gear 821 and a second drive shaft gear 822 are arranged at intervals on the drive shaft 90. Among them, the motor shaft gear 81 is meshed and connected with the third intermediate shaft gear 833, the first intermediate shaft gear 831 is meshed and connected with the first drive shaft gear 821, and the second intermediate shaft gear 832 is meshed and connected with the second drive shaft gear 822; at the same time, a gear shift synchronizer 842 is provided on the drive shaft 90 between the first drive shaft gear 821 and the second drive shaft gear 822, which can switch gears and form two speed transmission paths with different transmission ratios of the speed change mechanism. The parallel synchronizer 841 may be disposed between the auxiliary intermediate shafts 800 on both sides; of course, the parallel synchronizer 841 may also be disposed between the motor shafts of the two auxiliary drive motors 8 or between the two drive shafts 90 .

[0084] In general, by using two auxiliary drive motors 8 to drive the wheels 9 on the left and right sides respectively, the configuration of the auxiliary differential 85 can be omitted; moreover, by providing a parallel synchronizer 841 between the drive shafts 90 on the left and right sides or the speed change mechanism, not only can the driving forces on both sides be disengaged to achieve a differential effect, but when the wheel 9 on one side encounters bad road conditions and is difficult to get out of trouble, the parallel synchronizer 841 can also promptly engage the drive shafts 90 on both sides, thereby combining the power of the two auxiliary drive motors 8 and transmitting it to the wheel 9 to be freed, thereby improving the hybrid powertrain's ability to get out of trouble.

[0085] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A two-speed planetary hybrid transmission, characterized in that: It includes a power input unit, a power output unit, a planetary gear and a power switching device; The axial direction of the planetary gear set is arranged along the front-rear direction of the vehicle, the ring gear (72) of the planetary gear set is fixed on the transmission housing, one of the power input unit and the power output unit is transmission-connected to the sun gear (70) of the planetary gear set, and the other can be selectively connected to the sun gear (70) or the planet carrier (71) of the planetary gear set through the power switching device.

2. The two-speed planetary hybrid transmission according to claim 1, characterized in that: The power input unit comprises an input shaft (100) arranged along the front-rear direction of the vehicle, and the power switching device comprises a first clutch (31) and a second clutch (32) arranged on the input shaft (100); The first clutch (31) can selectively engage the planet carrier (71), and the second clutch (32) can selectively engage the sun gear (70).

3. The two-speed planetary hybrid transmission according to claim 2, characterized in that: The power output unit comprises an intermediate shaft (4) and an output shaft (5) which are arranged in parallel along the front-rear direction of the vehicle, the sun gear (70) is arranged on the intermediate shaft (4), and the output shaft (5) and the intermediate shaft (4) are connected in driving manner.

4. The two-speed planetary hybrid transmission according to claim 3, characterized in that: The output shaft (5) and the intermediate shaft (4) are connected in transmission via a gear set.

5. The two-speed planetary hybrid transmission according to claim 3, characterized in that: The output shaft (5) is provided with a first gear set (210) for transmission connection to the first motor (21); and / or the input shaft (100) is provided with a second gear set (220) for transmission connection to the second motor (22).

6. The two-speed planetary hybrid transmission according to claim 2, characterized in that: The input shaft (100) is connected to the power output shaft (10) of the engine (1) via a third clutch (33).

7. The two-speed planetary hybrid transmission according to claim 2 or 6, characterized in that: The input shaft (100) is provided with a first gear set (210) for transmission connection with the first motor (21).

8. A hybrid powertrain, characterized in that: It comprises an engine (1), a first motor (21), and a two-speed planetary hybrid transmission according to any one of claims 1 to 7; The engine (1) is drivingly connected to the power input unit, and the first motor (21) is drivingly connected to the power input unit or the power output unit.

9. A vehicle, characterized in that: The vehicle is provided with the hybrid powertrain and the auxiliary power system as claimed in claim 8, and the hybrid powertrain and the auxiliary power system can interchangeably drive the wheels (9) of the front axle and the rear axle of the vehicle respectively.

10. The vehicle according to claim 9, characterized in that: The auxiliary power system comprises an auxiliary drive motor (8), and the auxiliary drive motor (8) is directly arranged on or transmission-connected to the drive shaft (90) of the wheel (9); or, The auxiliary power system comprises two auxiliary drive motors (8), the two auxiliary drive motors (8) are respectively arranged corresponding to the drive shafts (90) of the wheels (9) on the left and right sides, and the two auxiliary drive motors (8) are respectively directly arranged on or transmission-connected to the drive shafts (90) on the corresponding sides.

Images