Planetary shunt coupling power system of hybrid electric vehicle and vehicle

Abstract

The utility model belongs to the technical field of hybrid power, and particularly relates to a hybrid electric vehicle planet shunting coupling power system and a vehicle, which comprise a first motor, a second motor, a first input shaft, a second input shaft, a planet row structure, a third input shaft, a power transmission mechanism, a differential mechanism structure and an engine, one end of the first input shaft is in transmission connection with a rotor of the first motor, the other end of the first input shaft is connected with the planet row structure, the first input shaft is sleeved with the second input shaft, one end of the second input shaft is in transmission connection with a rotor of the second motor, and the other end of the second input shaft is connected with the planet row structure. And the planet row structure is in transmission connection with the differential mechanism structure through a power transmission mechanism. All components in the system are reasonable in size and layout design and convenient to arrange and install, energy-saving efficiency and transmission efficiency are high, and wide-range application and popularization are facilitated.

Description

Technical Field

[0001] The utility model belongs to the technical field of hybrid power, and in particular relates to a planetary split-current coupling power system of a hybrid power vehicle and a vehicle. Background Art

[0002] With the development of the times, the world today is facing two major challenges: energy shortage and environmental degradation. Among them, traditional fuel vehicles are being seriously affected by the oil crisis and environmental degradation. In order to cope with the impact of the above environmental changes, people have developed hybrid vehicles to improve the economy of fuel vehicles.

[0003] The hybrid drive system is one of the important components of a hybrid vehicle, so that the vehicle has two power outputs. However, the technical problems existing in the existing hybrid drive system are that the components in the system are large in size and difficult to arrange and install, and the energy-saving efficiency and transmission efficiency are not high, which is not conducive to large-scale promotion and use.

[0004] The information disclosed in this background technology section is only intended to increase the understanding of the overall background of the present invention, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art already known to a person skilled in the art. Utility Model Content

[0005] The utility model provides a planetary split coupling power system of a hybrid electric vehicle and a vehicle, aiming to solve the technical problems pointed out in the above background technology.

[0006] In order to achieve the above object, the technical solution of the utility model is:

[0007] A hybrid electric vehicle planetary split coupling power system includes a first motor, a second motor, a first input shaft, a second input shaft with a hollow structure, a planetary gear structure, a third input shaft, a power transmission mechanism, a differential structure and an engine.

[0008] The first motor and the second motor are coaxially and overlapped, one end of the first input shaft is drivingly connected to the rotor of the first motor, and the other end is connected to the planetary gear structure.

[0009] The second input shaft is loosely sleeved on the first input shaft, and one end of the second input shaft is drivingly connected to the rotor of the second motor, and the other end is connected to the planetary gear structure.

[0010] One end of the third input shaft is connected to the planetary gear structure, and the other end is connected to the output end of the engine, and the engine is coaxially arranged with the first motor.

[0011] The planetary gear structure and the differential structure are transmission connected via the power transmission mechanism.

[0012] Preferably, the planetary gear structure includes a sun gear, multiple planetary gears, a ring gear, a planet carrier and a ring gear. The sun gear is arranged on the first input shaft, the ring gear is sleeved outside the sun gear, and one end of the ring gear is fixedly connected to the second input shaft. The ring gear is arranged on the ring gear, and multiple planetary gears are meshed and connected between the ring gear and the sun gear. The multiple planetary gears are evenly arranged on the planet carrier, and the third input shaft is connected between the planet carrier and the engine.

[0013] Preferably, the power transmission mechanism comprises a transmission shaft, a first gear and a second gear, the first gear and the second gear are arranged on the transmission shaft at an interval, the first gear is meshedly connected with the ring gear, and the second gear is meshedly connected with the differential structure.

[0014] Preferably, the first gear and the second gear are arranged in sequence along the axial direction of the transmission shaft and in a direction close to the first motor.

[0015] Preferably, the differential structure comprises a differential and a third gear, wherein the third gear is arranged on the differential and meshingly connected with the second gear.

[0016] The utility model also provides a vehicle, comprising the above-mentioned hybrid electric vehicle planetary split coupling power system.

[0017] Due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0018] 1. The utility model provides a planetary split coupling power system and vehicle for a hybrid vehicle. The first motor and the second motor are coaxial and overlapped. The assembly has a high degree of integration. The compact structure is convenient for arrangement and installation, and the comprehensive utilization efficiency is improved. The system is light in weight and can effectively reduce cost expenditure.

[0019] 2. The utility model adopts power split technology to couple the engine and the first motor and the second motor through a planetary gearbox, and can freely switch between multiple driving modes under various road conditions, making full use of the engine's efficient working range, effectively reducing the vehicle's fuel consumption and exhaust emissions, and improving the vehicle's energy-saving efficiency and transmission efficiency; the energy-saving and emission-reduction effects of the dual-motor planetary gearbox power split technology are achieved at a relatively low cost, while eliminating the engine's single-drive condition and its transmission system idling loss. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure of the utility model in the startup mode;

[0021] Figure 2 This is a schematic diagram of the structure of the utility model in the power generation mode;

[0022] Figure 3 This is a schematic diagram of the structure of the utility model in a pure electric mode;

[0023] Figure 4 It is a schematic diagram of the structure of the utility model in the engine drive / extended range drive mode.

[0024] The main component symbols in the figure are explained as follows:

[0025] 1. First motor; 2. Second motor; 3. First input shaft; 4. Second input shaft; 5. Planetary gear structure; 51. Sun gear; 52. Planetary gear; 53. Ring gear; 54. Planetary carrier; 55. Ring gear; 6. Third input shaft; 7. Power transmission mechanism; 71. Transmission shaft; 72. First gear; 73. Second gear; 8. Differential structure; 81. Differential; 82. Third gear; 9. Engine. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] Example

[0028] like Figures 1 to 4 As shown, a planetary split coupling power system of a hybrid vehicle includes a first motor 1, a second motor 2, a first input shaft 3, a second input shaft 4 with a hollow structure, a planetary gear structure 5, a third input shaft 6, a power transmission mechanism 7, a differential structure 8 and an engine 9. The first motor 1 and the second motor 2 are coaxial and overlapped. One end of the first input shaft 3 is drivingly connected to the rotor of the first motor 1, and the other end is connected to the planetary gear structure 5. The second input shaft 4 is loosely sleeved on the first input shaft 3, and one end of the third input shaft 6 is drivingly connected to the rotor of the second motor 2, and the other end is connected to the planetary gear structure 5. One end of the third input shaft 6 is connected to the planetary gear structure 5, and the other end is connected to the output end of the engine 9. The engine 9 is coaxially arranged with the first motor 1, and the planetary gear structure 5 and the differential structure 8 are drivingly connected via the power transmission mechanism 7.

[0029] In this embodiment, the planetary gear structure 5 includes a sun gear 51, multiple planetary gears 52, a ring gear 53, a planet carrier 54 and a ring gear 55. The sun gear 51 is arranged on the first input shaft 3, the ring gear 53 is sleeved outside the sun gear 51, and one end of the ring gear 53 is fixedly connected to the second input shaft 4, the ring gear 55 is arranged on the ring gear 53, and multiple planetary gears 52 are meshed and connected between the ring gear 53 and the sun gear 51. The multiple planetary gears 52 are evenly distributed on the planet carrier 54, and the third input shaft 6 is connected between the planet carrier 54 and the engine 9.

[0030] In this embodiment, the power transmission mechanism 7 includes a transmission shaft 71, a first gear 72 and a second gear 73. The first gear 72 and the second gear 73 are arranged on the transmission shaft 71 at intervals. The first gear 72 is meshed and connected with the ring gear 55, and the second gear 73 is meshed and connected with the differential structure 8.

[0031] Specifically, the first gear 72 and the second gear 73 are arranged in sequence along the axial direction of the transmission shaft 71 and in a direction close to the first motor 1 .

[0032] In this embodiment, the differential structure 8 includes a differential 81 and a third gear 82 . The third gear 82 is disposed on the differential 81 and meshed with the second gear 73 .

[0033] The utility model also provides a vehicle, comprising the hybrid power vehicle planetary split coupling power system in the above embodiment.

[0034] The utility model adopts planetary split coupling technology to couple the engine 9 with the first motor 1 and the second motor 2 through a planetary gear, and can freely switch between various driving modes such as power generation mode, engine driving mode, pure electric driving mode or extended-range driving mode under various road conditions, fully utilizing the engine's efficient working range, effectively reducing the fuel consumption and exhaust emissions of the vehicle, and improving the energy-saving efficiency and transmission efficiency of the vehicle.

[0035] (1) Starting the engine when the vehicle is stationary (starting mode)

[0036] See also Figure 1 When the vehicle is stationary, the ring gear 53 remains stationary. When the first motor 1 rotates, it drives the sun gear 51 to rotate. The sun gear 51 drives the planetary carrier 54 to rotate forward through the planetary gear 52 meshing with it. The planetary carrier 54 is rigidly connected to the engine 9, thereby driving the engine 9 to rotate. After the engine 9 reaches the starting speed, it ignites, and the vehicle can be operated.

[0037] (2) Charging of the first motor 1 when the vehicle is stationary (generation mode)

[0038] See also Figure 2When the vehicle is at rest, the ring gear 53 remains stationary. Since the engine 9 is rigidly connected to the planet carrier 54, that is, when the engine 9 rotates, the planet carrier 54 is driven to rotate, and the sun gear 51 is driven to rotate through the planetary gear 52 on the planet carrier 54. The sun gear 5 is rigidly connected to the first motor 1, and the sun gear 51 drives the motor 2 to rotate to achieve charging.

[0039] (3) Pure electric drive mode

[0040] See also Figure 3 When the vehicle is under light load / accelerating slowly, the engine 9 does not need to be started and the vehicle is driven directly by the second motor 2. That is, under this working condition, the engine 9 remains stationary, and the second motor 2 rotates forward to drive the second input shaft 4 to rotate, thereby driving the ring gear 53 to rotate, and the power is transmitted to the first gear 72 and the transmission shaft 71 through the ring gear 55, and is transmitted to the third gear 82 on the differential 81 through the second gear 73 on the transmission shaft 71, thereby driving the vehicle wheels to rotate through the differential 81.

[0041] (4) Engine drive / extended range drive mode

[0042] See also Figure 4 When the engine 9 rotates, the planetary carrier 54 is driven to rotate through the third input shaft 6, and the planetary carrier 54 drives the ring gear 53 to rotate through the planetary gear 52 on the planetary carrier 54. When the ring gear 53 rotates, on the one hand, it can drive the sun gear 51 to rotate, thereby driving the first motor 1 to rotate and charge through the first input shaft 3; on the other hand, through the rotation of the ring gear 53, the power can be transmitted to the first gear 72 and the transmission shaft 71 through the ring gear gear 55, and transmitted to the third gear 82 on the differential 81 through the second gear 73 on the transmission shaft 71, thereby driving the vehicle wheels to rotate through the differential 81; in this state, according to system requirements, the first motor 1 can be in a follow-up rotation or charging state, and the second motor 2 can be in a follow-up rotation, driving or braking energy recovery state.

[0043] The above description is a detailed description of the preferred feasible embodiment of the utility model, but the embodiment is not used to limit the scope of the patent application of the utility model. All equivalent changes or modified changes completed under the technical spirit suggested by the utility model should fall within the patent scope covered by the utility model.

Claims

1. A planetary split coupling power system for a hybrid electric vehicle, characterized in that: The invention comprises a first motor (1), a second motor (2), a first input shaft (3), a second input shaft (4) having a hollow structure, a planetary gear structure (5), a third input shaft (6), a power transmission mechanism (7), a differential structure (8) and an engine (9), The first motor (1) and the second motor (2) are coaxially and overlapped, one end of the first input shaft (3) is drivingly connected to the rotor of the first motor (1), and the other end is connected to the planetary gear structure (5). The second input shaft (4) is loosely sleeved on the first input shaft (3), and one end of the second input shaft (4) is drivingly connected to the rotor of the second motor (2), and the other end is connected to the planetary gear structure (5). One end of the third input shaft (6) is connected to the planetary gear structure (5), and the other end is connected to the output end of the engine (9), and the engine (9) is coaxially arranged with the first motor (1). The planetary gear structure (5) and the differential structure (8) are connected in transmission via the power transmission mechanism (7).

2. A planetary split coupling power system for a hybrid vehicle as claimed in claim 1, characterized in that: The planetary gear structure (5) comprises a sun gear (51), a plurality of planetary gears (52), a ring gear (53), a planet carrier (54) and a ring gear (55); the sun gear (51) is arranged on the first input shaft (3); the ring gear (53) is sleeved outside the sun gear (51), and one end of the ring gear (53) is fixedly connected to the second input shaft (4); the ring gear (55) is arranged on the ring gear (53); a plurality of planetary gears (52) are meshedly connected between the ring gear (53) and the sun gear (51); the plurality of planetary gears (52) are uniformly arranged on the planet carrier (54); and the third input shaft (6) is connected between the planet carrier (54) and the engine (9).

3. A planetary split coupling power system for a hybrid vehicle as claimed in claim 2, characterized in that: The power transmission mechanism (7) comprises a transmission shaft (71), a first gear (72) and a second gear (73); the first gear (72) and the second gear (73) are arranged on the transmission shaft (71) at intervals; the first gear (72) is meshedly connected to the ring gear (55); and the second gear (73) is meshedly connected to the differential structure (8).

4. A planetary split coupling power system for a hybrid vehicle as claimed in claim 3, characterized in that: The first gear (72) and the second gear (73) are arranged in sequence along the axial direction of the transmission shaft (71) and in a direction close to the first motor (1).

5. A planetary split coupling power system for a hybrid vehicle as claimed in claim 3, characterized in that: The differential structure (8) comprises a differential (81) and a third gear (82); the third gear (82) is arranged on the differential (81) and meshedly connected with the second gear (73).

6. A vehicle comprising the hybrid electric vehicle planetary split coupling power system according to any one of claims 1 to 5.

Images