Hybrid power driving system and new energy hybrid vehicle

Abstract

The invention discloses a hybrid power driving system and a new energy hybrid vehicle. The hybrid power driving system comprises a motor, a motor shaft, an intermediate shaft, an engine, a differential mechanism, a first-stage gear transmission pair, a second-stage gear transmission pair and a power coupling mechanism, wherein the first-stage gear transmission pair, the second-stage gear transmission pair and the power coupling mechanism are arranged on the intermediate shaft; the motor is connected with the first-stage gear transmission pair through a motor shaft, the engine is connected with the second-stage gear transmission pair through the power coupling mechanism, the second-stage gear transmission pair is connected with the differential mechanism, and the differential mechanism is connected with the driving wheel mechanism. When the engine is disconnected from the power coupling mechanism and the secondary gear transmission pair is combined with the differential mechanism, a pure electric motor driving mode is entered; when the engine is combined with the power coupling mechanism and the secondary gear transmission pair is disconnected from the differential mechanism, a range extending power generation mode is entered; and when the power coupling mechanism is disconnected with the engine and the second-stage gear transmission pair, a non-working mode is entered. The device has the characteristics of compact structure, high transmission efficiency, high stability and the like, and the endurance performance of the whole vehicle is improved.

Description

Technical Field

[0001] The present invention relates to the field of electric vehicle driving technology, and in particular to a hybrid power driving system and a new energy hybrid vehicle. Background Art

[0002] Hybrid systems can improve vehicle fuel economy in a variety of ways. For example, the engine can be shut down during idling, deceleration or braking, and the vehicle can be driven in pure electric mode to eliminate efficiency losses due to ineffective engine power output. In addition, energy generated by regenerative braking or by the motor during engine operation and stored in the power battery can be used in pure electric mode or supplement the engine's torque or power in hybrid mode.

[0003] Hybrid vehicles can be driven by combining at least two different power sources. Currently, most hybrid vehicles use a hybrid power system, which includes an engine powered by fuel and an electric motor driven by electricity. In order to maximize the combustion efficiency of the engine, many automobile manufacturers have developed hybrid power systems that use a dual-motor structure, that is, in addition to the front axle drive motor, a rear axle drive motor is also added. However, the overall structure of existing hybrid power systems is complex, the layout is difficult, and the total energy consumption is high.

[0004] In addition, in existing hybrid systems, the multi-speed mechanism is mainly realized through synchronizers and multiple gear pairs, and the power coupling is realized through multiple clutches. The existing disadvantages include: (1) when shifting gears and switching modes, it is easy to be frustrated, affecting the riding comfort; (2) there are many components and the cost is relatively high; (3) there is still room for improvement in transmission efficiency, especially in the gliding condition, the drag loss is relatively large. Summary of the invention

[0005] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a hybrid power drive system and a new energy hybrid vehicle with compact structure, high stability and high transmission efficiency.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0007] A hybrid power drive system comprises: a motor, a motor shaft, an intermediate shaft, an engine, a differential, a primary gear transmission pair, a secondary gear transmission pair and a power coupling mechanism; the primary gear transmission pair, the secondary gear transmission pair and the power coupling mechanism are arranged on the intermediate shaft, the output end of the motor is connected to the primary gear transmission pair through the motor shaft, the output end of the engine is connected to the secondary gear transmission pair through the power coupling mechanism, the secondary gear transmission pair is connected to the differential, and the output shaft of the differential is connected to the driving wheel mechanism; when the engine and the power coupling mechanism are in a disconnected state and the secondary gear transmission pair and the differential are in a coupled state, the hybrid power drive system enters a pure electric motor drive mode; when the engine and the power coupling mechanism are in a coupled state and the secondary gear transmission pair and the differential are in a disconnected state, the hybrid power drive system enters an extended-range power generation mode; when the power coupling mechanism and the engine and the secondary gear transmission pair are all in a disconnected state, the hybrid power drive system enters a non-working mode.

[0008] As a further improvement of the present invention, the first-stage gear transmission pair includes a first-stage pinion and a first-stage large gear that mesh with each other, the first-stage large gear is arranged on the intermediate shaft, and the first-stage pinion is connected to the motor shaft.

[0009] As a further improvement of the present invention, the secondary gear transmission pair includes a secondary pinion and a secondary gear meshing with each other, the secondary pinion is arranged on the intermediate shaft, and the secondary gear is connected to the differential.

[0010] As a further improvement of the present invention, the power coupling mechanism includes a left combining tooth, an intermediate gear hub, a gear sleeve and a right combining tooth; the left combining tooth is connected to the secondary pinion, the right combining tooth is connected to the output shaft of the engine, the intermediate gear hub is fixedly connected to the intermediate shaft, and the gear sleeve is arranged on the intermediate gear hub and can be axially moved to connect the left combining tooth or the right combining tooth.

[0011] As a further improvement of the present invention, when the hybrid drive system enters the pure electric motor drive mode, the gear sleeve moves to the left side of the middle gear hub and engages with the left engaging gear.

[0012] As a further improvement of the present invention, when the hybrid drive system enters the extended-range power generation mode, the gear sleeve moves to the right side of the intermediate gear hub and engages with the right engaging gear.

[0013] As a further improvement of the present invention, when the hybrid drive system enters a non-operating mode, the gear sleeve is located at a middle position of the intermediate gear hub.

[0014] As a further improvement of the present invention, a gear shaft is provided between the secondary pinion and the secondary gear, and the gear shaft is respectively meshed with the secondary pinion and the secondary gear.

[0015] As a further improvement of the present invention, the motor is a permanent magnet synchronous motor, an asynchronous motor or an electrically excited motor.

[0016] As a general technical concept, the present invention also provides a new energy hybrid vehicle, including a rear-wheel drive motor system and the above-mentioned hybrid power drive system, wherein the rear-wheel drive motor system and the hybrid power drive system are combined to form a four-wheel drive system of the hybrid vehicle.

[0017] As a further improvement of the present invention, the hybrid power drive system is arranged on the front axle of the new energy hybrid vehicle, and the rear-drive motor system is arranged on the rear axle of the new energy hybrid vehicle.

[0018] Compared with the prior art, the advantages of the present invention are:

[0019] 1. The hybrid power drive system of the present invention is composed of an engine, a motor, two pairs of gear transmission pairs, a power coupling mechanism and a differential to form a hybrid power drive system with a compact structure and a small number of parts, and is arranged on the front axle of the vehicle, and then cooperates with the rear motor drive system arranged on the rear axle, that is, a low-cost vehicle four-wheel drive form is realized, and it can flexibly switch between the two modes of pure electric motor drive or extended-range power generation.

[0020] 2. The new energy hybrid vehicle of the present invention includes the above-mentioned hybrid power drive system, takes into account both low cost and high efficiency transmission, and has better endurance. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is one of the schematic diagrams of the structural principle of the hybrid power drive system in a specific embodiment of the present invention;

[0022] Figure 2 It is a schematic diagram of the structural principle in a pure electric driving mode in a specific embodiment of the present invention;

[0023] Figure 3 It is a schematic diagram of the structural principle in the extended-range power generation mode in a specific embodiment of the present invention;

[0024] Figure 4 It is a schematic diagram of the transmission structure principle of the rear-drive motor system in the parallel axis mode in a specific embodiment of the present invention;

[0025] Figure 5 This is a second schematic diagram of the structural principle of a hybrid power drive system in a specific embodiment of the present invention;

[0026] Legend: 1. Motor; 2. Motor shaft; 31. Primary pinion; 32. Primary gear; 4. Intermediate shaft; 51. Secondary pinion; 52. Secondary gear; 61. Left coupling gear; 62. Intermediate gear hub; 63. Gear sleeve; 64. Right coupling gear; 7. Engine; 8. Wheel; 9. Axle shaft; 10. Differential; 11. Rear drive transmission gear pair one; 12. Rear drive transmission gear pair two; 13. Gear shaft. DETAILED DESCRIPTION

[0027] The present invention is further described below in conjunction with the accompanying drawings and specific preferred embodiments, but the protection scope of the present invention is not limited thereby.

[0028] In the description of the present invention, it should be understood that the terms "side", "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0029] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0030] Example

[0031] like Figure 1 As shown, the hybrid power drive system of the present invention is composed of a series of parts and components, and corresponds to different working modes through the power coupling and output of the engine and the motor to meet the actual needs of the vehicle. The hybrid power drive system mainly includes: a motor 1, a motor shaft 2, an intermediate shaft 4, an engine 7, a differential 10, a primary gear transmission pair, a secondary gear transmission pair and a power coupling mechanism. The intermediate shaft 4 is arranged with a primary gear transmission pair, a secondary gear transmission pair and a power coupling mechanism. The output end of the motor 1 is connected to the primary gear transmission pair through the motor shaft 2, the output end of the engine 7 is connected to the secondary gear transmission pair through the power coupling mechanism, the secondary gear transmission pair is connected to the differential 10, and the output shaft of the differential 10 is connected to the driving wheel mechanism. Specifically, the driving wheel mechanism is composed of a wheel 8 and a half shaft 9, and the output shaft of the differential 10 is connected to the wheel 8 through the half shaft 9.

[0032] When the engine 7 is disconnected from the power coupling mechanism and the secondary gear transmission pair is engaged with the differential 10, the hybrid drive system enters the pure electric motor 1 drive mode. When the engine 7 is engaged with the power coupling mechanism and the secondary gear transmission pair is disconnected from the differential 10, the hybrid drive system enters the extended range power generation mode. When the power coupling mechanism is disconnected from the engine 7 and the secondary gear transmission pair, the hybrid drive system enters the non-operating mode.

[0033] In this embodiment, a hybrid power drive system with a compact structure and a small number of parts is formed by an engine 7, a motor 1, two pairs of gear transmission pairs, a power coupling mechanism and a differential 10, and is arranged on the front axle of the vehicle, and combined with the rear motor drive system arranged on the rear axle, a low-cost four-wheel drive form of the vehicle is realized, and it can flexibly switch between the two modes of pure electric motor drive or extended-range power generation.

[0034] like Figure 1 As shown, the first-stage gear transmission pair includes a first-stage pinion 31 and a first-stage large gear 32 that mesh with each other. The first-stage large gear 32 is arranged on the intermediate shaft 4, and the first-stage pinion 31 is connected and fixed to the motor shaft 2.

[0035] like Figure 1 As shown, the secondary gear transmission pair includes a secondary pinion 51 and a secondary gear 52 that mesh with each other. The secondary pinion 51 is arranged on the intermediate shaft 4, and the secondary gear 52 is connected and fixed to the differential 10.

[0036] like Figure 1 As shown, the power coupling mechanism includes a left coupling tooth 61, an intermediate gear hub 62, a gear sleeve 63 and a right coupling tooth 64. The left coupling tooth 61 is connected and fixed to the secondary pinion 51, and the two are arranged on the intermediate shaft 4 through supporting elements such as bearings. The right coupling tooth 64 is connected to the output shaft of the engine 7, the intermediate gear hub 62 is connected and fixed to the intermediate shaft 4, and the gear sleeve 63 is arranged on the intermediate gear hub 62 and can move axially to connect the left coupling tooth 61 or the right coupling tooth 64.

[0037] like Figure 2 As shown, when the hybrid drive system enters the pure electric motor 1 driving mode, the gear sleeve 63 moves to the left side of the intermediate gear hub 62 and combines with the left coupling gear 61. The power transmission path is: motor 1→motor shaft 2→primary pinion 31→primary gear 32→intermediate shaft 4→intermediate gear hub 62→left coupling gear 61→secondary pinion 51→secondary gear 52→differential 10→axle shaft 9→wheel 8.

[0038] like Figure 3As shown, when the hybrid drive system enters the extended range power generation mode, the gear sleeve 63 moves to the right side of the intermediate gear hub 62 and combines with the right coupling gear 64. The power transmission path is: engine 7 → right coupling gear 63 → intermediate gear hub 62 → intermediate shaft 4 → primary large gear 32 → primary small gear 31 → motor shaft 2 → motor 1.

[0039] like Figure 1 As shown in the figure, when the hybrid drive system enters the non-operating mode, the gear sleeve 63 is in the middle position of the intermediate gear hub 62, and no power flow is transmitted. When the vehicle only needs rear-wheel drive, the hybrid drive system enters the non-operating mode, reducing the drag loss to a lower level, thereby improving the transmission efficiency and the vehicle's endurance performance.

[0040] In this embodiment, the motor 1 is a permanent magnet synchronous motor. In other embodiments, the motor 1 may also be an asynchronous motor or an electromagnetic motor or other common vehicle drive motors.

[0041] In this embodiment, a new energy hybrid vehicle is also provided, including a rear-wheel drive motor system and the above-mentioned hybrid power drive system. The rear-wheel drive motor system and the hybrid power drive system are combined to form a four-wheel drive system of the new energy hybrid vehicle, taking into account both low cost and high efficiency transmission.

[0042] Furthermore, the hybrid drive system is arranged on the front axle of the new energy hybrid vehicle, and the rear drive motor system is arranged on the rear axle of the new energy hybrid vehicle. When the vehicle only needs rear drive, the hybrid drive system enters a non-operating mode to reduce drag loss.

[0043] like Figure 4 The structure of the parallel shaft transmission mechanism in the rear-drive motor system is shown, the motor shaft 2 of the motor 1 is connected to the rear-drive transmission gear pair 1 11, the rear-drive transmission gear pair 1 11 and the rear-drive transmission gear pair 2 12 are transmitted through the transmission shaft, and the rear-drive transmission gear pair 2 12 is connected to the differential 10 to realize power transmission. It can be understood that in other embodiments, the rear-drive motor system can also use a coaxial transmission mechanism for transmission.

[0044] like Figure 5 As shown, in other embodiments, a gear shaft 13 is provided between the secondary pinion 51 and the secondary gear 52, and the gear shaft 13 is respectively meshed with the secondary pinion 51 and the secondary gear 52. The power output by the motor 1 or the engine 7 is transmitted to the secondary pinion 51, and then transmitted to the secondary gear 52 via the gear shaft 13. By providing the gear shaft 13, the relative distance between the motor 1 or the engine 7 and the half shaft 9 can be flexibly adjusted, which is convenient for the layout of the whole vehicle.

[0045] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A hybrid power drive system, characterized in that: include: A motor (1), a motor shaft (2), an intermediate shaft (4), an engine (7), a differential (10), a primary gear transmission pair, a secondary gear transmission pair and a power coupling mechanism; the intermediate shaft (4) is provided with a primary gear transmission pair, a secondary gear transmission pair and a power coupling mechanism; the output end of the motor (1) is connected to the primary gear transmission pair through the motor shaft (2); the output end of the engine (7) is connected to the secondary gear transmission pair through the power coupling mechanism; the secondary gear transmission pair is connected to the differential (10); the output shaft of the differential (10) is connected to the driving wheel mechanism; when the engine (7) and the power coupling mechanism are in a disconnected state and the secondary gear transmission pair and the differential (10) are in a connected state, the hybrid power drive system enters a pure electric motor (1) drive mode; when the engine (7) and the power coupling mechanism are in a connected state and the secondary gear transmission pair and the differential (10) are in a disconnected state, the hybrid power drive system enters an extended range power generation mode; when the power coupling mechanism and the engine (7) and the secondary gear transmission pair are all in a disconnected state, the hybrid power drive system enters a non-operating mode.

2. The hybrid drive system according to claim 1, characterized in that: The first-stage gear transmission pair comprises a first-stage pinion (31) and a first-stage large gear (32) meshing with each other, the first-stage large gear (32) being arranged on an intermediate shaft (4), and the first-stage pinion (31) being connected to a motor shaft (2).

3. The hybrid drive system according to claim 2, characterized in that: The secondary gear transmission pair comprises a secondary pinion (51) and a secondary gear (52) meshing with each other, the secondary pinion (51) being arranged on an intermediate shaft (4), and the secondary gear (52) being connected to a differential (10).

4. The hybrid drive system according to claim 3, characterized in that: The power coupling mechanism comprises a left coupling tooth (61), an intermediate gear hub (62), a gear sleeve (63) and a right coupling tooth (64); the left coupling tooth (61) is connected to the secondary pinion (51), the right coupling tooth (64) is connected to the output shaft of the engine (7), the intermediate gear hub (62) is fixedly connected to the intermediate shaft (4), and the gear sleeve (63) is arranged on the intermediate gear hub (62) and can be axially moved to connect to the left coupling tooth (61) or the right coupling tooth (64).

5. The hybrid drive system according to claim 4, characterized in that: When the hybrid drive system enters the pure electric motor (1) drive mode, the gear sleeve (63) moves to the left side of the intermediate gear hub (62) and is coupled with the left coupling gear (61).

6. The hybrid drive system according to claim 4, characterized in that: When the hybrid drive system enters the extended-range power generation mode, the gear sleeve (63) moves to the right side of the intermediate gear hub (62) and is coupled with the right coupling gear (64).

7. The hybrid drive system according to claim 4, characterized in that: When the hybrid drive system enters a non-operating mode, the gear sleeve (63) is located at a middle position of the intermediate gear hub (62).

8. The hybrid drive system according to any one of claims 3 to 7, characterized in that: A gear shaft (13) is provided between the secondary pinion gear (51) and the secondary large gear (52), and the gear shaft (13) is meshed with the secondary pinion gear (51) and the secondary large gear (52) respectively.

9. A new energy hybrid vehicle, characterized in that: It comprises a rear-wheel drive motor system and a hybrid power drive system as described in any one of claims 1 to 8, wherein the rear-wheel drive motor system and the hybrid power drive system are combined to form a four-wheel drive system of a new energy hybrid vehicle.

10. The new energy hybrid vehicle according to claim 9, characterized in that: The hybrid power drive system is arranged on the front axle of the new energy hybrid vehicle, and the rear-drive motor system is arranged on the rear axle of the new energy hybrid vehicle.

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