Hybrid power driving system and hybrid power vehicle

Abstract

The utility model discloses a hybrid power driving system and a hybrid power vehicle, and relates to the technical field of hybrid power, the hybrid power driving system comprises a first power assembly, a second power assembly, a third power assembly, a first planet row, a second planet row and a differential mechanism; the first planet row comprises a first planet carrier, a first sun gear, a first planet gear and a gear ring, the third input shaft is sleeved with the first sun gear, the first planet gear is in transmission connection with the intermediate shaft, and the first planet gear is rotationally installed on the first planet carrier and engaged with the first sun gear and the gear ring; the second planet row comprises a second planet carrier, a second planet gear and a second sun gear, the second planet carrier is directly connected with the first planet carrier or the gear ring, and the second planet gear is rotationally installed on the second planet carrier and meshed with the second sun gear; the differential is in transmission connection with the intermediate shaft. A clutch does not need to be arranged for switching among all modes, the switching efficiency is high, the structure is simple and compact, occupied space is small, cost is low, and arrangement is easier.

Description

Technical Field

[0001] The utility model relates to the technical field of hybrid power, and particularly relates to a hybrid drive system and a hybrid vehicle. Background Art

[0002] With the rapid development of the automotive industry, the requirements for energy conservation and emission reduction are becoming increasingly stringent. Hybrid electric vehicles have gradually become best-selling models in the market. Developing more advanced hybrid vehicles is the direction pursued by various automobile manufacturers. Hybrid vehicles use batteries and fuel as energy sources and engines and motors to provide driving forces, combining the advantages of long-range of traditional fuel vehicles and high operating efficiency and low emissions of pure electric vehicles. The fuel consumption and emission levels of hybrid vehicles have been greatly improved, which is of great significance for environmental protection and energy conservation.

[0003] Vehicles in the prior art, especially hybrid vehicles, usually have an engine and a motor. When the vehicle is driven only by the motor, it is in pure electric mode. When the vehicle is driven by the motor and the engine together, it is in hybrid mode. The vehicle adapts to different operating scenarios by switching different driving modes to meet the requirements of torque and speed of the vehicle.

[0004] However, the current hybrid power system is relatively complex. A clutch is required to switch between pure electric mode and hybrid mode, with a low switching rate, easy power loss, and large space occupation and high cost due to the complex structure. Summary of the Utility Model

[0005] The main purpose of the utility model is to propose a hybrid drive system and a hybrid vehicle, aiming to solve the problems of low switching rate between pure electric mode and hybrid mode in the existing hybrid power system and large space occupation due to more structures.

[0006] To achieve the above object, a hybrid drive system proposed by the utility model includes:

[0007] A first power component, the first power component includes a first motor, a first input shaft and an intermediate shaft. The first motor is connected to the first input shaft, and the first input shaft is in transmission connection with the intermediate shaft;

[0008] A second power component, the second power component includes a second motor and a second input shaft. The second motor is connected to the second input shaft;

[0009] A third power component, the third power component includes an engine and a third input shaft. The engine is connected to the third input shaft;

[0010] The first planetary gear set, the first planetary gear set includes a first planet carrier, a first sun gear, first planet gears and a ring gear, the first planet carrier is connected to the third input shaft, the first sun gear is sleeved on the third input shaft and is in transmission connection with the intermediate shaft, the first planet gears are rotatably mounted on the first planet carrier and are meshed with the first sun gear and the ring gear;

[0011] The second planetary gear set, the second planetary gear set includes a second planet carrier, second planet gears and a second sun gear, the second planet carrier is directly connected to the first planet carrier or the ring gear, the second planet gears are rotatably mounted on the second planet carrier and are meshed with the second sun gear, the second sun gear is connected to the second input shaft;

[0012] The differential, the differential is in transmission connection with the intermediate shaft, and the differential is used for torque output.

[0013] In one embodiment, a plurality of the first planet gears are provided, the plurality of first planet gears are all rotatably mounted on the first planet carrier, and the plurality of first planet gears are all arranged at intervals along the outer edge of the first sun gear and are all meshed with the first sun gear.

[0014] In one embodiment, a plurality of the second planet gears are provided, the plurality of second planet gears are all rotatably mounted on the second planet carrier, and the plurality of second planet gears are all arranged at intervals along the outer edge of the second sun gear and are all meshed with the second sun gear.

[0015] In one embodiment, the first power assembly includes:

[0016] The first driving gear, the first driving gear is arranged on the first input shaft;

[0017] The first driven gear, the first driven gear is arranged on the intermediate shaft;

[0018] The first driving gear is meshed with the first driven gear, so that the first input shaft is in transmission connection with the intermediate shaft.

[0019] In one embodiment, an input gear is further sleeved on the first input shaft, the input gear is in transmission connection with the first sun gear, and the input gear is meshed with the first driven gear, so that the first sun gear is in transmission connection with the intermediate shaft.

[0020] In one embodiment, the hybrid drive system further includes a transmission mechanism, and the transmission mechanism includes:

[0021] The input gear, the input gear is sleeved on the first input shaft and the input gear is in transmission connection with the first sun gear,

[0022] A first intermediate gear, which is arranged on the intermediate shaft, and the first intermediate gear meshes with the input gear;

[0023] A clutch, which is used to connect or disconnect the first intermediate gear and the intermediate shaft.

[0024] In one embodiment, a second intermediate gear is further arranged on the intermediate shaft, the differential includes differential gears, and the first intermediate gear meshes with the differential gears to drive the differential to be in transmission connection with the intermediate shaft.

[0025] In one embodiment, a one-way locking mechanism is arranged on the third input shaft, and the one-way locking mechanism enables the third input shaft to rotate in one direction.

[0026] In one embodiment, the third input shaft and the second input shaft are coaxially arranged.

[0027] The present utility model further provides a hybrid vehicle, which applies the hybrid drive system as described above.

[0028] The technical solution of the present utility model can drive the vehicle to travel in different power modes without using a clutch by controlling the working states of the engine, the first motor and the second motor. The switching rate is high, and the engine and the second motor are in transmission connection through the first planetary gear set and the second planetary gear set. The engine can also output power through the first planetary gear set to drive the vehicle, and the second motor can also output power through the first planetary gear set and the second planetary gear set to drive the vehicle. The short power transmission path reduces power loss, and there is no need to arrange a clutch, so the structure is simple and compact, the space utilization rate is high, and the cost is low and it is easier to arrange. Description of the Drawings

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on the structures shown in these drawings without creative efforts.

[0030] Figure 1 It is a schematic structural diagram of an embodiment of the hybrid drive system provided by the present utility model;

[0031] Figure 2 It is a schematic structural diagram of another embodiment of the hybrid drive system provided by the present utility model;

[0032] Figure 3Schematic diagram of another embodiment of the hybrid drive system provided by the present utility model.

[0033] Explanation of reference numerals in the drawings:

[0034] 100, hybrid drive system; 1, first power assembly; 10, first motor; 11, first input shaft; 111, first driving gear; 12, intermediate shaft; 121, first driven gear; 122, second intermediate gear; 2, second power assembly; 20, second motor; 21, second input shaft; 3, third power assembly; 30, engine; 31, third input shaft; 32, torsional damper; 33, one-way locking mechanism; 4, first planetary gear set; 40, first planetary carrier; 41, first sun gear; 42, first planetary gear; 43, ring gear; 5, second planetary gear set; 50, second planetary carrier; 51, second sun gear; 52, second planetary gear; 53, second ring gear; 6, transmission mechanism; 61, input gear; 62, first intermediate gear; 63, clutch; 7, differential; 71, differential gear.

[0035] The realization, functional features and advantages of the purpose of the present utility model will be further described with reference to the embodiments and the accompanying drawings. Specific embodiments

[0036] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0037] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present utility model, the directional indications are only used to explain the relative position relationship and movement conditions between components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0038] In addition, if the descriptions such as "first" and "second" are involved in the embodiments of the present utility model, the descriptions of "first", "second", etc. are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel scenarios. Taking "A and / or B" as an example, it includes Scenario A, or Scenario B, or the scenario where both A and B are satisfied simultaneously. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present utility model.

[0039] With the rapid development of the automotive industry, the requirements for energy conservation and emission reduction are becoming increasingly stringent. Hybrid electric vehicles have gradually become best-selling models in the market. Developing more advanced hybrid vehicles is the direction pursued by various automobile manufacturers. Hybrid vehicles use batteries and fuel as energy sources and engines and electric motors to provide driving forces, combining the advantages of long cruising range of traditional fuel vehicles and high operating efficiency and low emissions of pure electric vehicles. The fuel consumption and emission levels of hybrid vehicles have been greatly improved, which is of great significance to environmental protection and energy conservation.

[0040] Vehicles in the prior art, especially hybrid vehicles, usually have engines and electric motors. When the vehicle is driven only by the electric motor, it is in the pure electric mode. When the vehicle is driven by both the electric motor and the engine, it is in the hybrid mode. The vehicle adapts to different operating scenarios by switching different driving modes to meet the requirements of the vehicle's torque and speed.

[0041] However, at present, the hybrid power system is relatively complex. A clutch is required to switch between the pure electric mode and the hybrid mode, resulting in a low switching rate and easy power loss, and a large space occupation due to more structures.

[0042] The present utility model proposes a hybrid drive system 100.

[0043] Please refer to Figure 1, in an embodiment of the present utility model, the hybrid drive system 100 includes a first power assembly 1, a second power assembly 2, a third power assembly 3, a first planetary gear set 4, a second planetary gear set 5 and a differential 7; the first power assembly 1 includes a first motor 10, a first input shaft 11 and an intermediate shaft 12, the first motor 10 is connected to the first input shaft 11, and the first input shaft 11 is drivingly connected to the intermediate shaft 12; the second power assembly 2 includes a second motor 20 and a second input shaft 21, the second motor 20 is connected to the second input shaft 21; the third power assembly 3 includes an engine 30 and a third input shaft 31, the engine 30 is connected to the third input shaft 31; the first planetary gear set 4 includes a first planetary carrier 40, a first sun gear 41, a first planetary gear 42 and a ring gear 43, the first planetary carrier 40 is connected to the third input shaft 31, the first sun gear 41 is sleeved on the third input shaft 31 and is drivingly connected to the intermediate shaft 12, the first planetary gear 42 is rotatably mounted on the first planetary carrier 40 and meshes with the first sun gear 41 and the ring gear 43; the second planetary gear set 5 includes a second planetary carrier 50, a second planetary gear 52 and a second sun gear 51, the second planetary carrier 50 is directly connected to the first planetary carrier 40 or the ring gear 43, the second planetary gear 52 is rotatably mounted on the second planetary carrier 50 and meshes with the second sun gear 51, and the second sun gear 51 is connected to the second input shaft 21; the differential 7 is drivingly connected to the intermediate shaft 12, and the differential 7 is used for torque output.

[0044] The technical solution of the present utility model provides power through the engine 30, the first motor 10 and the second motor 20 to meet the different torque requirements of the vehicle under different road conditions. The engine 30 outputs power through the third input shaft 31, the first motor 10 outputs power through the first input shaft 11, and the second motor 20 outputs power through the second input shaft 21. Specifically, the third input shaft 31 is connected to the first planet carrier 40, the first planet carrier 40 drives the first planet gear 42 to rotate, and the first planet gear 42 meshes with the first sun gear 41 and the ring gear 43, so that the power can be transmitted to the intermediate shaft 12 through the first sun gear 41. The first planetary gear set 4 and the second planetary gear set 5 are drivingly connected. The second planet carrier 50 of which is connected to the ring gear 43, and the second planet carrier 50 can drive the second planet gear 52 and the second sun gear 51 to rotate, so as to transmit the power to the second input shaft 21. In addition, the power of the second motor 20 can also be transmitted to the first planetary gear set 4 through the second input shaft 21 and the second planetary gear set 5, and then the power is transmitted to the intermediate shaft 12 through the first sun gear 41, so as to transmit the power to the differential 7 to drive the vehicle to travel. The first motor 10 directly transmits the power to the intermediate shaft 12 through the first input shaft 11, so as to drive the vehicle to travel. By controlling the operation, driving and shutdown of the engine 30, the first motor 10 and the second motor 20, the vehicle can be driven in different power modes. The engine 30 and the second motor 20 realize power transmission through two planetary gear sets. The power transmission path is short, the structure is simple and compact, and it is easier to arrange.

[0045] As Figure 1 shown, the second planet carrier 50 is connected to the ring gear 43.

[0046] It should be noted that in this embodiment, the working states of the engine 30, the first motor 10 and the second motor 20 include operation, driving and shutdown. Among them, "driving" means providing power; "operation" means not providing power and only used for power generation; "shutdown" means not working. Therefore, the hybrid drive system 100 in this embodiment can realize the following operation modes:

[0047] The first mode: the first motor 10 drives, the second motor 20 is shut down, and the engine 30 is shut down. The first mode can be understood as a pure electric single-motor drive mode. At this time, the power of the first motor 10 is transmitted to the intermediate shaft 12 through the first input shaft 11, and is transmitted from the intermediate shaft 12 to the differential 7 to drive the vehicle to travel, which is suitable for the vehicle to travel on the flat road and for the vehicle to start.

[0048] Second mode: The first motor 10 is turned off, the second motor 20 is driving, and the engine 30 is turned off; The second mode can also be understood as a pure electric single-motor driving mode. At this time, the power of the second motor 20 is transmitted to the second planetary gear set 5 through the second input shaft 21, and the power is transmitted from the second planetary gear set 5 to the first planetary gear set 4, and the first planetary gear set 4 transmits the power to the intermediate shaft 12, and then the power is transmitted from the intermediate shaft 12 to the differential 7 to drive the vehicle forward.

[0049] Third mode: The first motor 10 is driving, the second motor 20 is driving, and the engine 30 is turned off; The third mode can be understood as a pure electric dual-motor driving mode. The power transmission paths of the first motor 10 and the second motor 20 refer to the power transmission paths in the first mode and the second mode. The power of both the first motor 10 and the second motor 20 is transmitted to the intermediate shaft 12 and then drives the vehicle forward through the differential 7.

[0050] Fourth mode: The first motor 10 is turned off, the second motor 20 is turned off, and the engine 30 is driving; The fourth mode can be understood as a pure fuel driving mode, using the engine 30 to directly drive the vehicle forward. The power of the engine 30 is transmitted to the intermediate shaft 12 through the first planetary gear set 4, and then drives the vehicle forward through the differential 7.

[0051] Fifth mode: The first motor 10 is driving, the second motor 20 is turned off, and the engine 30 is driving; The fifth mode can be understood as a hybrid mode, using the engine 30 and the motor to drive the vehicle forward at the same time. The power is relatively large, which is suitable for situations such as the vehicle driving on a slope, starting on a slope, and overtaking.

[0052] Sixth mode: The first motor 10 is driving, the second motor 20 is operating, and the engine 30 is driving; The sixth mode can also be understood as a hybrid mode. While driving the vehicle through the first motor 10, the engine 30 is also used to drive the second motor 20 to generate electricity. The power of the engine 30 is transmitted to the second planetary gear set 5 through the first planetary gear set 4, and then drives the second motor 20 to generate electricity. The electric energy generated by the second motor 20 can be stored in the vehicle's battery and used to provide electric energy for the first motor 10.

[0053] Seventh mode: The first motor 10 is turned off, the second motor 20 is operating, and the engine 30 is driving; At this time, the engine 30 drives the second motor 20 to generate electricity, which is suitable for the vehicle to generate electricity when parked, so that there is enough electric energy for subsequent vehicle driving, or the vehicle can also be driven by the engine 30 at the same time.

[0054] Eighth mode: The first motor 10 is operating, the second motor 20 is turned off, and the engine 30 is turned off; The eighth mode is suitable for the vehicle to slide or decelerate. During the vehicle's sliding or decelerating process, the differential 7 drives the first intermediate shaft 12 to rotate in the reverse direction, and then drives the first motor 10 to generate electricity through the first input shaft 11, realizing the recovery of kinetic energy.

[0055] The utility model controls the working states of the engine 30, the first motor 10 and the second motor 20, and can drive the vehicle in different power modes without using a clutch. The switching rate is high, and the engine 30 and the second motor 20 are connected by a transmission connection through the first planetary gear 4 and the second planetary gear 5. The engine 30 can also output power to drive the vehicle through the first planetary gear 4, and the second motor 20 can also output power to drive the vehicle through the first planetary gear 4 and the second planetary gear 5. The power transmission path is short to reduce power loss, and there is no need to arrange a clutch. The structure is simple and compact, the space utilization rate is high, the cost is low, and it is easier to arrange.

[0056] In one embodiment, a plurality of first planetary gears 42 are provided, and the plurality of first planetary gears 42 are rotatably mounted on the first planet carrier 40 . The plurality of first planetary gears 42 are spaced apart along the outer edge of the first sun gear 41 and mesh with the first sun gear 41 .

[0057] It can be understood that the first sun gear 41 is meshed with the multiple first planetary gears 42 through its outer edge. The multiple first planetary gears 42 are arranged at intervals to balance the inertial force acting on the first sun gear 41 and the first planetary carrier 40, thereby ensuring the high efficiency of power transmission and improving the overall stability and vibration resistance of the first planetary gear 4.

[0058] The first planetary carrier 40 serves as a supporting structure, which not only carries the first planetary gears 42, but also is responsible for fixing each first planetary gear 42 in an appropriate position. The first planetary row 4 can realize multi-speed shifting to meet different power requirements. Among them, in order to ensure the smooth operation of the planetary gear mechanism, the first planetary carrier 40 is usually made of high-strength material.

[0059] In one embodiment, a plurality of second planetary gears 52 are provided, and the plurality of second planetary gears 52 are rotatably mounted on the second planet carrier 50 . The plurality of second planetary gears 52 are spaced apart along the outer edge of the second sun gear 51 and meshed with the second sun gear 51 .

[0060] It can be understood that the function of the multiple first planetary gears 42 is the same as that of the above-mentioned arrangement, which is mainly used to balance the inertial force acting on the second sun gear 51 and the second planetary carrier 50, thereby ensuring the high efficiency of power transmission and also improving the overall stability and vibration resistance of the second planetary gear 5.

[0061] Further, the second planetary gear set 5 further includes a second ring gear 53, which meshes with each second planetary gear 52. The second ring gear 53 is arranged on the inner wall of the transmission housing. It should be noted that in actual assembly, the second input shaft 21, the third input shaft 31, the first planetary gear set 4, and the second planetary gear set 5 are all arranged inside the transmission housing to prevent damage and external interference from destroying the hybrid drive system 100. By arranging the second ring gear 53 on the inner wall of the housing, it is used to prevent the second planetary gear 52 from shifting, making the second planetary gear 52 operate more smoothly.

[0062] In one embodiment, the first power assembly 1 includes a first driving gear 111 and a first driven gear 121. The first driving gear 111 is arranged on the first input shaft 11; the first driven gear 121 is arranged on the intermediate shaft 12; the first driving gear 111 meshes with the first driven gear 121 to transmit power between the first input shaft 11 and the intermediate shaft 12.

[0063] Understandably, the first driving gear 111 is arranged on the first input shaft 11 and rotates with the rotation of the first input shaft 11. The first driven gear 121 is arranged on the first intermediate shaft 12. When the first input shaft 11 drives the first driving gear 111 to rotate, the first driving gear 111 drives the first driven gear 121 to rotate, and then drives the first intermediate shaft 12 to rotate. The first input shaft 11 and the first intermediate shaft 12 achieve power transmission only through two meshing first driving gear 111 and first driven gear 121. The short power transmission path results in less power loss and a compact structure with less space occupation.

[0064] In one embodiment, an input gear 61 is also sleeved on the first input shaft 11. The input gear 61 is in transmission connection with the first sun gear 41, and the input gear 61 meshes with the first driven gear 121 to transmit power between the first sun gear 41 and the intermediate shaft 12.

[0065] Understandably, the first sun gear 41 and the input gear 61 are coaxial. When the first sun gear 41 rotates, the input gear 61 rotates synchronously. The input gear 61 then drives the first driven gear 121 to rotate, and then drives the first intermediate shaft 12 to rotate. The power transmission path is short, resulting in less power loss of the engine 30, enabling a more rapid mode switch and quickly utilizing the power of the engine 30 after the mode switch.

[0066] Among them, the input gear 61 is directly connected to the first sun gear 41 and is sleeved on the third input shaft 31 in an idle state; or the input gear 61 and the first sun gear 41 are arranged on the same shaft, and this shaft is sleeved on the third input shaft 31 in an idle state.

[0067] Such as Figure 2As shown, in another embodiment, the hybrid drive system 100 further includes a transmission mechanism 6. The transmission mechanism 6 includes an input gear 61, a first intermediate gear 62, and a clutch 63. The input gear 61 is sleeved on the first input shaft 11 and the input gear 61 is in transmission connection with the first sun gear 41. The first intermediate gear 62 is arranged on the intermediate shaft 12, and the first intermediate gear 62 meshes with the input gear 61. The clutch 63 is used to connect or disconnect the first intermediate gear 62 and the intermediate shaft 12.

[0068] It can be understood that the transmission mechanism 6 is used to control the power output of the engine 30 and the second motor 20. Specifically, after the first intermediate gear 62 and the intermediate shaft 12 are disconnected by the clutch 63, the first motor 10 can still drive the vehicle, and the rotation of the intermediate shaft 12 does not drive the first intermediate gear 62 to rotate. Therefore, it does not interfere with the first planetary gear set 4 and reduces power loss. When the first intermediate gear 62 and the intermediate shaft 12 are connected by the clutch 63, the power of the engine 30 and the second motor 20 can be transmitted to the intermediate shaft 12. Therefore, setting the clutch 63 can reduce power loss and avoid interference between some structures.

[0069] Specifically, the clutch 63 is a synchronizer, a toothed clutch 63, a friction plate clutch 63, or a one-way clutch 63.

[0070] It can be understood that when the first clutch 63 is a synchronizer, the synchronizer can synchronize the rotational speeds of the third input shaft 31 and the output shaft, and normally switch between various modes. Moreover, the synchronizer can also play a buffering role. Similarly, when the second clutch 63 is set as a synchronizer, it has a similar effect for synchronizing rotational speeds, which will not be elaborated here. When the first clutch 63 and the second clutch 63 are toothed clutches 63, torque transmission can be accurately performed. The friction plate clutch 63 can make torque transmission smooth, and when disconnected, it is fast and thorough, and has good heat dissipation performance. When the first clutch 63 is a one-way clutch 63, the torque of the third input shaft 31 can be transmitted to the output shaft. When the engine 30 is not running, the one-way clutch 63 automatically disengages to prevent the output shaft from driving the third input shaft 31 to rotate. Similarly, when the second clutch 63 is set as a one-way clutch 63, it has a similar effect for automatically disengaging to prevent reverse power transmission, which will not be elaborated here.

[0071] In one embodiment, a second intermediate gear 122 is further arranged on the intermediate shaft 12. The differential 7 includes a differential gear 71. The first intermediate gear 62 meshes with the differential gear 71 to enable the differential 7 to be in transmission connection with the intermediate shaft 12.

[0072] It can be understood that the power transmission between the intermediate shaft 12 and the differential 7 is realized through the meshing first intermediate gear 62 and differential gear 71. The power transmission path is short, the power loss is small, and the vehicle can be driven faster.

[0073] Among them, the first driving gear 111 is smaller than the first driven gear 121 to achieve the first-stage speed reduction. The first driven gear 121 is larger than the second intermediate gear 122 to achieve the second-stage speed reduction. The rotational speed of the first motor 10 reaches the differential 7 after two-stage speed reduction, reducing the speed to increase the large torque and improve the load capacity.

[0074] Furthermore, a one-way locking mechanism 33 is provided on the third input shaft 31. The one-way locking mechanism 33 enables the third input shaft 31 to rotate unidirectionally. It can be understood that the one-way locking mechanism 33 enables the third input shaft 31 to only rotate in the same direction as the engine 30, preventing the third input shaft 31 from transmitting power to the engine 30.

[0075] In one embodiment, the third power mechanism further includes a torsional damper 32. The engine 30 is connected to the third input shaft 31 through the torsional damper 32. It can be understood that through the torsional damper 32, the torsional stiffness between the crankshaft of the engine 30 and the first input shaft 11 can be reduced, thereby reducing the natural frequency of torsional vibration of the transmission system; and it can also increase the torsional damping of the transmission system, suppress the amplitude of torsional resonance response, and attenuate the transient torsional vibration generated by impact.

[0076] In one embodiment, the third input shaft 31 and the second input shaft 21 are coaxially arranged. It can be understood that the second input shaft 21 and the third input shaft 31 are coaxially arranged, with a more compact structure, reducing the space occupation and being more conducive to layout, and the power transmission is easier.

[0077] As Figure 3 shown, in another embodiment of the present utility model, the second planet carrier 50 is connected to the first planet carrier 40. It can be understood that such a setting makes the structure more compact and is more conducive to power transmission.

[0078] Specifically, the ring gear 43 and the second ring gear 53 are both arranged on the inner wall of the gearbox housing, respectively used to make the first planet gear 42 and the second planet gear 52 more stable.

[0079] The present utility model also proposes a hybrid vehicle, which includes a hybrid drive system 100. The specific structure of this hybrid vehicle refers to the above embodiments. Since this hybrid vehicle adopts all the technical solutions of the above all embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be elaborated one by one here.

[0080] The above are only exemplary embodiments of the present utility model, and do not limit the patent scope of the present utility model accordingly. Any equivalent structural transformation made under the technical concept of the present utility model by using the content of the specification and drawings of the present utility model, or any direct / indirect application in other related technical fields is included in the patent protection scope of the present utility model.

Claims

1. A hybrid drive system, characterized in that, The hybrid drive system includes: A first power assembly, the first power assembly includes a first motor, a first input shaft and an intermediate shaft, the first motor is connected to the first input shaft, and the first input shaft is in transmission connection with the intermediate shaft; A second power assembly, the second power assembly includes a second motor and a second input shaft, the second motor is connected to the second input shaft; A third power assembly, the third power assembly includes an engine and a third input shaft, the engine is connected to the third input shaft; A first planetary gear set, the first planetary gear set includes a first planet carrier, a first sun gear, first planet gears and a ring gear, the first planet carrier is connected to the third input shaft, the first sun gear is sleeved on the third input shaft and is in transmission connection with the intermediate shaft, the first planet gears are rotatably mounted on the first planet carrier and mesh with the first sun gear and the ring gear; A second planetary gear set, the second planetary gear set includes a second planet carrier, second planet gears and a second sun gear, the second planet carrier is directly connected to the first planet carrier or the ring gear, the second planet gears are rotatably mounted on the second planet carrier and mesh with the second sun gear, and the second sun gear is connected to the second input shaft; A differential, the differential is in transmission connection with the intermediate shaft, and the differential is used for torque output.

2. The hybrid drive system according to claim 1, characterized in that A plurality of the first planet gears are provided, and the plurality of first planet gears are all rotatably mounted on the first planet carrier, and the plurality of first planet gears are all arranged at intervals along the outer edge of the first sun gear and all mesh with the first sun gear.

3. The hybrid drive system according to claim 1, characterized in that, A plurality of the second planet gears are provided, and the plurality of second planet gears are all rotatably mounted on the second planet carrier, and the plurality of second planet gears are all arranged at intervals along the outer edge of the second sun gear and all mesh with the second sun gear.

4. The hybrid drive system according to claim 1, characterized in that, The first power assembly includes: A first driving gear, the first driving gear is arranged on the first input shaft; A first driven gear, the first driven gear is arranged on the intermediate shaft; The first driving gear meshes with the first driven gear so that the first input shaft is in transmission connection with the intermediate shaft.

5. The hybrid drive system according to claim 4, characterized in that, An input gear is further sleeved on the first input shaft, the input gear is in transmission connection with the first sun gear, and the input gear meshes with the first driven gear so that the first sun gear is in transmission connection with the intermediate shaft.

6. The hybrid drive system according to claim 4, characterized in that: The hybrid drive system further includes a transmission mechanism, and the transmission mechanism includes: An input gear, the input gear is sleeved on the first input shaft and the input gear is in transmission connection with the first sun gear, A first intermediate gear, the first intermediate gear is arranged on the intermediate shaft, and the first intermediate gear meshes with the input gear; A clutch, the clutch is used to connect or disconnect the first intermediate gear and the intermediate shaft.

7. The hybrid drive system according to claim 6, characterized in that, A second intermediate gear is further arranged on the intermediate shaft, the differential includes a differential gear, and the first intermediate gear meshes with the differential gear so that the differential is in transmission connection with the intermediate shaft.

8. The hybrid drive system according to any one of claims 1 to 6, characterized in that, A one-way locking mechanism is provided on the third input shaft, and the one-way locking mechanism enables the third input shaft to rotate unidirectionally.

9. The hybrid drive system according to any one of claims 1 to 6, characterized in that The third input shaft and the second input shaft are coaxially arranged.

10. A hybrid vehicle, characterized in that, The hybrid drive system as described in any one of claims 1 to 9 is applied.

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