A single motor hybrid system

Abstract

The utility model provides a kind of single motor hybrid power system, including engine, motor, differential, intermediate shaft, first clutch and second clutch, engine and motor coaxial arrangement, first clutch is arranged between the output shaft of engine and the rotor shaft of motor, the rotor shaft of motor is also connected with the first end of intermediate shaft by first transmission mechanism, second clutch is arranged in intermediate shaft, the second end of intermediate shaft is connected with differential by second transmission mechanism.The utility model's hybrid power system engine and motor coaxial arrangement, and first clutch can be integrated with motor, axial space is small.The utility model's hybrid power system is arranged in front axle, and it can realize whole car four-wheel drive by cooperation with main drive arranged in rear axle, and it can be switched between range extending and four-wheel drive according to whole car demand.First clutch is arranged in intermediate shaft, and the space in the middle of vehicle body is relatively large, and the driving form can be designed diversely.

Description

Technical Field

[0001] This utility model relates to the field of machinery, and more particularly to electric vehicle drive technology, especially a single-motor hybrid power system. Background Technology

[0002] The current development of electric vehicles (EVs) is driven by the pursuit of long range and high performance. This requires alleviating customers' range anxiety while meeting the power demands of specific usage scenarios (such as off-road adventures and handling damaged roads). Therefore, the concepts of range extender and four-wheel drive have been increasingly discussed in recent years. However, current technology still lacks mature powertrain products that can simultaneously achieve range extension and four-wheel drive functions. Products already in mass production typically employ a dual-motor design, using one motor as a generator and the other as a drive motor. This results in a complex and non-compact structure, large space occupation, and high cost. Furthermore, it lacks the flexibility to adapt to other powertrains, leading to redundant development and impacting efficiency. Utility Model Content

[0003] The purpose of this utility model is to provide a single-motor hybrid power system to solve the technical problems of existing drive systems, such as complex and non-compact structure, large space occupation, and inability to achieve flexible adaptation with other powertrains.

[0004] This utility model provides a single-motor hybrid power system, including an engine, a motor, a differential, an intermediate shaft, a first clutch, and a second clutch. The engine and motor are coaxially arranged. The first clutch is located between the output shaft of the engine and the rotor shaft of the motor. The rotor shaft of the motor is also connected to the first end of the intermediate shaft through a first transmission mechanism. The second clutch is located in the intermediate shaft, and the second end of the intermediate shaft is connected to the differential through a second transmission mechanism.

[0005] Furthermore, the first clutch is integrated with the rotor shaft of the motor.

[0006] Furthermore, the first transmission mechanism includes a primary driving gear, an idler gear, and a primary driven gear. The primary driving gear is mounted on the rotor shaft of the motor and meshes with the idler gear. The idler gear is connected to an idler gear shaft and meshes with the primary driven gear, which is mounted on an intermediate shaft.

[0007] Furthermore, the primary drive gear is mounted on the rotor shaft of the motor via a spline.

[0008] Furthermore, the primary driven gear is mounted on the intermediate shaft via a needle roller bearing.

[0009] Furthermore, the second transmission mechanism includes a second-stage driving gear and a second-stage driven gear. The second-stage driving gear is installed at the second end of the intermediate shaft and meshes with the second-stage driven gear. The second-stage driven gear is installed on the differential.

[0010] Furthermore, the secondary drive gear is fixed to the intermediate shaft by spline or welding.

[0011] Furthermore, the secondary driven gear is connected to the differential by bolts or welding.

[0012] Furthermore, the differential is connected to the two front wheels via the left and right half-shafts, respectively.

[0013] Furthermore, it also includes a rear axle drive system, which is connected to the two rear wheels.

[0014] Compared with existing technologies, the advantages of this invention are positive and significant. In this invention's hybrid power system, the engine and motor are coaxially arranged, and the first clutch can be integrated with the motor, minimizing axial space occupation. The hybrid power system is located on the front axle, and when combined with the main drive unit located on the rear axle, it enables four-wheel drive for the entire vehicle. Furthermore, it can switch between range extender and four-wheel drive modes according to the vehicle's needs. This hybrid power system utilizes the motor's ability to both drive and generate electricity, achieving both range extender and four-wheel drive modes with a single motor. Therefore, it simplifies the structure while significantly reducing costs. The first clutch is located on the intermediate axle, resulting in relatively large space in the middle of the vehicle body, allowing for diverse drive configurations. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of a single-motor hybrid power system according to the present invention.

[0016] Figure 2 This is a schematic diagram of the four-wheel drive operation of a single-motor hybrid power system according to this utility model.

[0017] Figure 3 This is a schematic diagram of the range-extending operation of a single-motor hybrid power system according to this utility model. Detailed Implementation

[0018] The present invention will be further described below with reference to embodiments, but the present invention is not limited to these embodiments. Any similar variations using the present invention should be included in the protection scope of the present invention. The use of directional terms such as up, down, front, back, left, right, middle, inside, and outside in the present invention is only for the convenience of clear description and is not intended to limit the technical solution of the present invention.

[0019] like Figures 1-3As shown, a single-motor hybrid power system of this utility model includes an engine 1, a motor 3, a differential 11, an intermediate shaft 7, a first clutch 2, and a second clutch 8. The engine 1 and the motor 3 are coaxially arranged. The first clutch 2 is disposed between the output shaft of the engine 1 and the rotor shaft of the motor 3. The rotor shaft of the motor 3 is also connected to the first end of the intermediate shaft 7 through a first transmission mechanism. The second clutch 8 is disposed in the intermediate shaft 7, and the second end of the intermediate shaft 7 is connected to the differential 11 through a second transmission mechanism.

[0020] Furthermore, the first clutch 2 is integrated with the rotor shaft of the motor 3.

[0021] Furthermore, the first transmission mechanism includes a primary drive gear 4, an idler gear, and a primary driven gear 6. The primary drive gear 4 is mounted on the rotor shaft of the motor 3. The primary drive gear 4 meshes with the idler gear. The idler gear is connected to an idler gear shaft 5. The idler gear meshes with the primary driven gear 6. The primary driven gear 6 is mounted on an intermediate shaft 7.

[0022] Furthermore, the primary drive gear 4 is mounted on the rotor shaft of the motor 3 via a spline.

[0023] Furthermore, the primary driven gear 6 is mounted on the intermediate shaft 7 via a needle roller bearing.

[0024] Furthermore, the second transmission mechanism includes a second-stage driving gear 9 and a second-stage driven gear 10. The second-stage driving gear 9 is installed at the second end of the intermediate shaft 7, and the second-stage driving gear 9 meshes with the second-stage driven gear 10. The second-stage driven gear 10 is installed on the differential 11.

[0025] Furthermore, the secondary drive gear 9 is fixed to the intermediate shaft 7 by spline or welding.

[0026] Furthermore, the secondary driven gear 10 is connected to the differential 11 by bolts or welding.

[0027] Furthermore, the differential 11 is connected to the two front wheels via the left half-shaft 12 and the right half-shaft 13, respectively.

[0028] Furthermore, it also includes a rear axle drive system, which is connected to the two rear wheels.

[0029] Specifically, the specific structure and principle of the engine 1, motor 3, differential 11, clutch, spline, needle roller bearing, and rear axle drive system in this utility model, as well as other aspects not described in detail, all adopt well-known solutions in the prior art, which are understood and implemented by those skilled in the art, and will not be elaborated here.

[0030] Working principle:

[0031] The hybrid power system of this invention has the following two operating conditions:

[0032] Four-wheel drive mode: corresponding power flow as follows Figure 2 As indicated by the arrow, the first clutch 2 is disengaged, the second clutch 8 is engaged, the engine 1 is not working, and the motor 3 is started. At this time, the motor 3 is equivalent to a drive motor. The battery supplies power to the motor 3. The output power of the motor 3 passes through the first-stage drive gear 4, the idler shaft 5, and the first-stage driven gear 6. Since the second clutch 8 is engaged, the first-stage driven gear 6 can transmit power to the intermediate shaft 7, and then through the second-stage drive gear 9, the second-stage driven gear 10, the differential 11, the left half-shaft 12, and the right half-shaft 13 to the front wheels.

[0033] Range-extended operating condition: corresponding power flow as follows Figure 3 As indicated by the arrow, the first clutch 2 engages, the second clutch 8 disengages, and the engine 1 starts. The torque is transmitted to the motor 3 via the first clutch 2, at which point the motor 3 acts as a generator to charge the battery. Simultaneously, power is transmitted to the first-stage driven gear 6 via the first-stage drive gear 4 and the idler shaft 5. Since the second clutch 8 is disengaged, the first-stage driven gear 6 is decoupled from the intermediate shaft 7 via the needle roller bearing, so the power transmission stops here and does not continue.

[0034] In this invention, the engine 1 and motor 3 are coaxially arranged, minimizing axial space occupation. A first clutch 2 is positioned between the motor 3 and engine 1, making it well-suited for front-wheel drive applications. A second clutch 8 is located on the intermediate shaft 7. The engagement and disengagement of the first clutch 2 and the second clutch 8 allow for switching between range-extending and four-wheel drive modes, aiming to increase driving range and meet high-performance requirements. This invention features a simple structure, low cost, high integration, and can be front-mounted, offering flexible compatibility with traditional powertrain layouts. It expands range-extending vehicle models on a pure electric platform, avoiding redundant development.

[0035] The gear pair of the first transmission mechanism adopts a three-stage gear transmission, mainly considering space layout. This can be flexibly designed; the three-stage gear can be split into two stages of transmission, or a single-stage transmission can be used, depending on the layout space and the vehicle's power and efficiency requirements for the speed ratio.

[0036] In summary, the advantages of this utility model are as follows:

[0037] 1. In this utility model, the engine 1 and motor 3 of the hybrid power system are coaxially arranged, and the first clutch 2 can be integrated with the motor 3, resulting in a small axial space occupation. The motor 3 can also be a dual-shaft motor. Furthermore, this utility model has fewer parts and the transmission mechanism can be flexibly arranged. Therefore, this utility model has the advantages of a compact structure and ease of vehicle layout.

[0038] 2. The hybrid power system of this utility model is located on the front axle, and together with the main drive unit located on the rear axle, it can achieve four-wheel drive for the entire vehicle. Furthermore, it can switch between range extender and four-wheel drive according to the vehicle's needs. By flexibly matching with the rear axle main drive unit, it can be directly extended for use in pure electric vehicles, improving development efficiency.

[0039] 3. The hybrid power system of this invention utilizes the function of motor 3, which can both drive and generate electricity, and can achieve range extension and four-wheel drive modes with a single motor 3. Therefore, it simplifies the structure while achieving a significant reduction in cost.

[0040] 4. The high-efficiency drive motor 3 generates electricity using the high-efficiency range of engine 1, without directly driving the wheels, resulting in high overall efficiency.

[0041] 5. The first clutch 2 is located on the intermediate shaft 7. The space in the middle of the vehicle body is relatively large, and the drive form can be designed in various ways. Hydraulic, electric motor, electromagnetic and other solutions can be adopted. The form is flexible and easy to implement in different vehicle models.

Claims

1. A single-motor hybrid power system, comprising an engine, a motor, and a differential, characterized in that, It also includes an intermediate shaft, a first clutch, and a second clutch. The engine and the motor are coaxially arranged. The first clutch is located between the output shaft of the engine and the rotor shaft of the motor. The rotor shaft of the motor is also connected to the first end of the intermediate shaft through a first transmission mechanism. The second clutch is located in the intermediate shaft, and the second end of the intermediate shaft is connected to the differential through a second transmission mechanism.

2. The single-motor hybrid power system according to claim 1, characterized in that, The first clutch is integrated with the rotor shaft of the motor.

3. A single-motor hybrid power system according to claim 1, characterized in that, The first transmission mechanism includes a primary driving gear, an idler gear, and a primary driven gear. The primary driving gear is mounted on the rotor shaft of the motor and meshes with the idler gear. The idler gear is connected to an idler gear shaft and meshes with the primary driven gear, which is mounted on an intermediate shaft.

4. A single-motor hybrid power system according to claim 3, characterized in that, The primary drive gear is mounted on the rotor shaft of the motor via a spline.

5. A single-motor hybrid power system according to claim 3, characterized in that, The primary driven gear is mounted on the intermediate shaft via a needle roller bearing.

6. A single-motor hybrid power system according to claim 1, characterized in that, The second transmission mechanism includes a second-stage driving gear and a second-stage driven gear. The second-stage driving gear is installed at the second end of the intermediate shaft and meshes with the second-stage driven gear. The second-stage driven gear is installed on the differential.

7. A single-motor hybrid power system according to claim 6, characterized in that, The secondary drive gear is fixed to the intermediate shaft by spline or welding.

8. A single-motor hybrid power system according to claim 6, characterized in that, The secondary driven gear is connected to the differential by bolts or welding.

9. A single-motor hybrid power system according to claim 1, characterized in that, The differential is connected to the two front wheels via the left and right half-shafts, respectively.

10. A single-motor hybrid power system according to claim 9, characterized in that, It also includes a rear axle drive system, which is connected to the two rear wheels.

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