Power dividing type hybrid power system and vehicle

Abstract

The utility model belongs to the technical field of hybrid power, and particularly relates to a power shunting type hybrid power system and a vehicle, which comprise a first motor, a second motor, a first input shaft, a second input shaft with a hollow structure, a planet row structure, 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 second motor, the other end of the first input shaft is connected with the engine, 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 first motor, 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 the power transmission mechanism. According to the system, all components are reasonable in size and layout design, arrangement and installation are convenient, the integration level is high, the energy-saving efficiency and the transmission efficiency are high, and large-scale 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 power split type hybrid power system 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, the integration is not high, 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 power split hybrid power system 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 power split hybrid 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 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 second motor, and the other end is connected to the engine.

[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 first motor, and the other end is connected to the planetary gear structure.

[0010] The planetary gear structure and the differential structure are transmission connected via the power transmission mechanism.

[0011] Preferably, the planetary gear structure includes a sun gear, multiple planetary gears, a ring gear, a planet carrier and a planet carrier 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, multiple planetary gears are meshedly connected between the ring gear and the sun gear, the multiple planetary gears are evenly arranged on the planet carrier, and the planet carrier gear is arranged on the planet carrier.

[0012] 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 to the planetary carrier gear, and the second gear is meshedly connected to the differential structure.

[0013] 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 engine.

[0014] 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.

[0015] The utility model also provides a vehicle, comprising the above-mentioned power split hybrid power system.

[0016] Due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0017] 1. The utility model provides a power-split hybrid power system and a vehicle, wherein the first motor and the second motor are coaxially and overlappedly arranged, the assembly has a high degree of integration, and the compact structure is convenient for arrangement and installation, thereby improving the comprehensive utilization efficiency; the system is light in weight and can effectively reduce cost expenditure.

[0018] 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. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the structure of the utility model in the power generation mode;

[0020] Figure 2 This is a schematic diagram of the structure of the utility model in the engine driving mode;

[0021] Figure 3 This is a schematic diagram of the structure of the utility model in a pure electric drive mode;

[0022] Figure 4It is a schematic diagram of the structure of the utility model in the extended-range driving mode.

[0023] The main component symbols in the figure are explained as follows:

[0024] 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. Planet carrier; 55. Planet carrier gear; 6. Power transmission mechanism; 61. Transmission shaft; 62. First gear; 63. Second gear; 7. Differential structure; 71. Differential; 72. Third gear; 8. Engine. DETAILED DESCRIPTION

[0025] 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.

[0026] Example

[0027] like Figures 1 to 4 As shown, a power-split hybrid power system 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 power transmission mechanism 6, a differential structure 7 and an engine 8. 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 second motor 2, and the other end is connected to the engine 8. 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 first motor 1, and the other end is connected to the planetary gear structure 5. The planetary gear structure 5 and the differential structure 7 are drivingly connected via the power transmission mechanism 6.

[0028] 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 planet carrier 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. Multiple planetary gears 52 are meshedly 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 planet carrier gear 55 is arranged on the planet carrier 54.

[0029] The power transmission mechanism 6 includes a transmission shaft 61 , a first gear 62 and a second gear 63 . The first gear 62 and the second gear 63 are arranged on the transmission shaft 61 at intervals. The first gear 62 is meshedly connected to the planetary carrier gear 55 , and the second gear 63 is meshedly connected to the differential structure 7 .

[0030] Specifically, the first gear 62 and the second gear 63 are arranged in sequence along the axial direction of the transmission shaft 61 and in a direction close to the engine 8 .

[0031] In this embodiment, the differential structure 7 includes a differential 71 and a third gear 72 . The third gear 72 is disposed on the differential 71 and meshed with the second gear 63 .

[0032] The utility model also provides a vehicle, comprising the power split hybrid power system in the above embodiment.

[0033] The utility model adopts power split technology to couple the engine 8 with the first motor 1 and the second motor 2 through a planetary gearbox, and can freely switch among 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.

[0034] (1) Power generation mode

[0035] See also Figure 1 When the vehicle is in the power generation mode, the engine 8 is started to drive the first input shaft 3 to rotate, thereby controlling the rotation of the rotor of the second motor 2 and making the second motor 2 enter the power generation mode and charge the power battery pack, while the first motor 1 is not working at this time; the power generation mode is applied when the vehicle is stopped or the vehicle air conditioner is in working state, so as to facilitate charging the low-power power battery pack.

[0036] (2) Engine drive mode

[0037] See also Figure 2 When the vehicle is in the engine drive mode, the engine 8 is started to drive the first input shaft 3 to rotate and drive the sun gear 51 to rotate, and in turn drive the planetary gear 52, the planetary carrier 54 and the planetary carrier gear 55 to rotate, and the power is transmitted to the first gear 62 meshing with it and the transmission shaft 61 through the planetary carrier gear 55, and is transmitted to the third gear 72 on the differential 71 through the second gear 63 of the transmission shaft 61, thereby driving the vehicle wheels to rotate through the differential 71; the engine drive mode can be applied to the vehicle when it is on a high-speed road condition, which is conducive to achieving fuel efficiency and economy.

[0038] (3) Pure electric drive mode

[0039] See also Figure 3When the vehicle is in pure electric drive mode, the first motor 1 provides energy through the vehicle power battery pack. The first motor 1 drives the second input shaft 4 to rotate and drives the ring gear 53 connected thereto to rotate through the second input shaft 4. The ring gear 53 drives the planetary gear 52, the planetary carrier 54 and the planetary carrier gear 55 to rotate in turn. The power is transmitted to the first gear 62 meshing with it and the transmission shaft 61 through the planetary carrier gear 55, and is transmitted to the third gear 72 on the differential 71 through the second gear 63 on the transmission shaft 61, thereby driving the vehicle wheels to rotate through the differential 71. In this pure electric drive mode, the vehicle can bring zero exhaust emissions and effectively reduce noise pollution, thereby improving the economic performance of the entire vehicle.

[0040] (4) Extended-range driving mode

[0041] See also Figure 4 When the vehicle is in the extended-range drive mode, the engine 8 is started to drive the first input shaft 3 to rotate, thereby controlling the rotation of the rotor of the second motor 2 and allowing the second motor 2 to generate electricity to supply power to the first motor 1. The first motor 1 drives the second input shaft 4 to rotate and drives the ring gear 53 connected thereto to rotate through the second input shaft 4. The ring gear 53 drives the planetary gear 52, the planetary carrier 54 and the planetary carrier gear 55 to rotate in turn. The power is transmitted to the first gear 62 meshing with it and the transmission shaft 61 through the planetary carrier gear 55, and is transmitted to the third gear 72 on the differential 71 through the second gear 63 of the transmission shaft 61, thereby driving the vehicle wheels to rotate through the differential 71. In the extended-range drive mode, the first motor 1 and the engine 8 can automatically adjust the working state according to parameters such as vehicle speed, acceleration, and battery power to achieve the optimal driving effect and energy utilization efficiency.

[0042] In addition, it should be noted that in the engine drive mode, in addition to driving the vehicle, the engine 8 can also charge the vehicle's battery pack through the second motor 2, which is "engine mode" + "power generation mode"; at the same time, the first motor 1 can also drive the vehicle. This working condition is called "parallel", which is "engine mode" + "electric drive mode".

[0043] When the vehicle is braking, the braking energy can be recovered through the first motor 1. The transmission path of this mode is the same as that of the pure electric mode, but the direction of energy transfer is opposite.

[0044] 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 power split hybrid system, 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 power transmission mechanism (6), a differential structure (7) and an engine (8), 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 second motor (2), and the other end is connected to the engine (8). 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 first motor (1), and the other end of the second input shaft (4) is connected to the planetary gear structure (5). The planetary gear structure (5) and the differential structure (7) are connected in transmission via the power transmission mechanism (6).

2. A power split hybrid power system 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 planet carrier 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); 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 planet carrier gear (55) is arranged on the planet carrier (54).

3. A power split hybrid power system as claimed in claim 2, characterized in that: The power transmission mechanism (6) comprises a transmission shaft (61), a first gear (62) and a second gear (63); the first gear (62) and the second gear (63) are arranged on the transmission shaft (61) at intervals; the first gear (62) is meshedly connected to the planetary carrier gear (55); and the second gear (63) is meshedly connected to the differential structure (7).

4. A power split hybrid power system as claimed in claim 3, characterized in that: The first gear (62) and the second gear (63) are arranged in sequence along the axial direction of the transmission shaft (61) and in a direction close to the engine (8).

5. A power split hybrid power system as claimed in claim 3, characterized in that: The differential structure (7) comprises a differential (71) and a third gear (72); the third gear (72) is arranged on the differential (71) and meshedly connected with the second gear (63).

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

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