Longitudinal rear-drive dual-motor hybrid power system and vehicle

Abstract

The invention provides a longitudinally-arranged rear-drive dual-motor hybrid power system and a vehicle, and relates to the technical field of vehicle power systems.The longitudinally-arranged rear-drive dual-motor hybrid power system comprises a power input shaft, a generator assembly, a planet row assembly and a power output shaft; the generator assembly comprises a generator body and a generator output shaft connected with the generator body, the planet row assembly comprises a planet carrier, a planet wheel arranged on the planet carrier, a sun wheel and a gear ring meshed with the planet wheel, and a gear ring connecting mechanism connected with the gear ring, the end, away from the generator body, of the generator output shaft is connected with the sun gear, the planet carrier is connected with the power input shaft, and the gear ring is connected with the power output shaft through a gear ring connecting mechanism. The planet row assembly is connected with the generator assembly and the power input shaft, the arrangement length can be effectively shortened, power dividing can be effectively achieved, the space utilization rate and the whole vehicle power performance under the low-speed working condition are improved, and the application requirement of a vehicle with limited space can be met.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle power systems, and in particular to a longitudinal rear-drive dual-motor hybrid power system and a vehicle. Background Art

[0002] Hybrid technology can effectively reduce automobile carbon emissions without the mileage anxiety of pure electric vehicles, especially plug-in hybrid vehicles, which can be charged through charging piles and can be driven by pure electricity, in series extended-range mode or engine direct drive mode. It has a very broad market prospect. Dual-motor hybrid transmission technology is one of the mainstream hybrid technologies used in hybrid vehicles.

[0003] In hybrid vehicles, the layout of the power system is crucial, which directly affects the driving performance of hybrid vehicles. The existing longitudinal rear-wheel drive dual-motor hybrid system usually requires a longer layout space and is not suitable for vehicles with limited space. In addition, the existing longitudinal rear-wheel drive dual-motor hybrid system has many gears, shift mechanisms, clutch mechanisms, actuators, etc., with many parts and high layout costs, which greatly increases the manufacturing cost of the entire vehicle. In addition, the existing longitudinal rear-wheel drive dual-motor hybrid system is very likely to fail to drive the wheel end due to the limitation of the speed ratio under very low vehicle speed conditions, and only the drive motor drives the wheel end. The power of the entire vehicle is weak, which seriously affects the user's driving experience. Summary of the invention

[0004] Based on this, the purpose of the present invention is to provide a longitudinal rear-wheel drive dual-motor hybrid power system and vehicle, aiming to solve the technical problems in the prior art that the longitudinal rear-wheel drive dual-motor hybrid power system usually requires a longer layout space and has a high layout cost. Under conditions where the vehicle speed is very low, it is easy for the engine to fail to drive the wheel end due to speed ratio limitations, and only the drive motor drives the wheel end, resulting in weak power of the entire vehicle.

[0005] The object of the present invention is to provide a longitudinal rear-wheel drive dual-motor hybrid power system, including a power input shaft, a generator assembly, a planetary gear assembly and a power output shaft, wherein the generator assembly includes a generator body and a generator output shaft connected to the generator body, the planetary gear assembly includes a planetary carrier, planetary wheels arranged on the planetary carrier, a sun gear and a ring gear meshing with the planetary wheels, and a ring gear connecting mechanism connected to the ring gear, wherein the end of the generator output shaft away from the generator body is connected to the sun gear, the planetary carrier is connected to the power input shaft, and the ring gear is connected to the power output shaft through the ring gear connecting mechanism.

[0006] Furthermore, the generator output shaft is a hollow shaft, and one end of the power input shaft passes through the generator body and the generator output shaft in sequence and is connected to the planet carrier.

[0007] Furthermore, the generator body, the generator output shaft and the power input shaft are coaxially arranged.

[0008] Furthermore, the longitudinal rear-wheel drive dual-motor hybrid system also includes a drive motor assembly, which includes a drive motor body and a drive motor output shaft connected to the drive motor body, wherein the drive motor output shaft is a hollow shaft, and one end of the power output shaft passes through the interior of the drive motor body and the drive motor output shaft in sequence and is connected to the ring gear connection mechanism.

[0009] Furthermore, the drive motor body, the drive motor output shaft and the power output shaft are coaxially arranged.

[0010] Furthermore, the longitudinal rear-wheel drive dual-motor hybrid system also includes a drive motor reduction device, which is located between the drive motor assembly and the planetary gear assembly. The drive motor reduction device includes a driving gear, a driven gear meshing with the driving gear, an intermediate shaft connected to the driven gear, an output pinion connected to an end of the intermediate shaft away from the driven gear, and an output gear meshing with the output pinion, an end of the drive motor output shaft away from the drive motor body is connected to the driving gear, and an end of the power output shaft close to the ring gear connection mechanism is connected to the output gear.

[0011] Furthermore, the intermediate shaft is arranged in parallel with the power output shaft.

[0012] Furthermore, the connection between the intermediate shaft and the driven gear and the output pinion is a hard connection respectively, and the connection between the power output shaft and the output gear is a hard connection.

[0013] Furthermore, the power input shaft and the power output shaft are coaxially arranged.

[0014] The present invention also provides a vehicle, comprising the longitudinal rear-wheel drive dual-motor hybrid power system.

[0015] Compared with the prior art, the longitudinal rear-drive dual-motor hybrid system of the present invention has the following beneficial effects:

[0016] 1. The transmission connection between the generator assembly and the power input shaft is realized through a planetary gear assembly. This connection method can not only effectively shorten the layout length of the power system, so that the power system can be arranged more compactly in the vehicle, greatly improve the space utilization rate, and meet the application requirements of automobiles with limited space, but also effectively realize the function of power diversion, so that the engine of the vehicle can also provide power to drive the wheel end together with the drive motor under very low vehicle speed conditions, so as to achieve the purpose of improving the low-speed power of the whole vehicle. Specifically, the generator assembly includes a generator body and a generator output shaft connected to the generator body, and the planetary gear assembly includes a planet carrier, a planetary gear, a sun gear, a ring gear, and a ring gear connection mechanism, wherein the end of the generator output shaft away from the generator body is connected to the sun gear, the planet carrier is connected to the power input shaft, and the ring gear is connected to the power output shaft through the ring gear connection mechanism, thereby realizing the transmission connection between the generator assembly and the power input shaft.

[0017] 2. The drive motor assembly is coaxially arranged with the power output shaft. This arrangement has a simpler structure. In actual use, the drive motor assembly can form a single-speed ratio output with the wheels. There is no need to set up a complex control system to achieve optimal energy utilization, which is conducive to reducing the manufacturing cost of the vehicle and greatly improving market competitiveness.

[0018] 3. The power input shaft and the power output shaft are coaxially arranged. This arrangement can effectively reduce the radial dimension of the power system, making the power system structure more compact and meeting the needs of automotive applications with limited space. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the longitudinal rear-wheel drive dual-motor hybrid power system of the present invention.

[0020] Among them, the above-mentioned drawings include the following figure marks: 100-power input shaft; 200-generator body; 300-generator output shaft; 400-planetary gear assembly; 401-sun gear; 402-planet carrier; 403-planetary gear; 404-ring gear; 405-ring gear connection mechanism; 500-drive motor reduction device; 501-driving gear; 502-driven gear; 503-intermediate shaft; 504-output pinion; 505-output gear; 600-drive motor output shaft; 700-drive motor body; 800-power output shaft.

[0021] The following specific implementation manner will further illustrate the present invention in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0022] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. Several embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0023] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0025] See also Figure 1 , shown is a longitudinal rear-wheel drive dual-motor hybrid power system of the present invention, including a power input shaft 100, a generator assembly, a planetary gear assembly 400 and a power output shaft 800, wherein the generator assembly is transmission-connected to the power input shaft 100 through the planetary gear assembly 400. Specifically, in this embodiment, the generator assembly includes a generator body 200 and a generator output shaft 300 connected to the generator body 200, the planetary gear assembly 400 includes a planet carrier 402, planetary gears 403 arranged on the planet carrier 402, a sun gear 401 and a ring gear 404 meshing with the planetary gears 403, and a ring gear connection mechanism 405 connected to the ring gear 404, wherein the end of the generator output shaft 300 away from the generator body 200 is connected to the sun gear 401, the planet carrier 402 is connected to the power input shaft 100, and the ring gear 404 is connected to the power output shaft 800 through the ring gear connection mechanism 405. It should be noted that the design of realizing the transmission connection between the power input shaft 100 and the generator assembly through the planetary gear assembly 400 in this embodiment can not only effectively shorten the layout length of the power system, so that the power system can be arranged more compactly in the vehicle, greatly improving the space utilization rate and meeting the application requirements of automobiles with limited space, but also effectively realize the power diversion function, so that the vehicle's engine can provide power and drive the wheel end together with the drive motor under very low vehicle speed conditions, thereby achieving the purpose of improving the low-speed power of the entire vehicle.

[0026] Furthermore, the generator output shaft 300 is a hollow shaft, and one end of the power input shaft 100 passes through the inside of the generator body 200 and the generator output shaft 300 in sequence and is connected to the planet carrier 402. It can also be said that the generator body 200 and the generator output shaft 300 in this embodiment are hollow sleeved on the power input shaft 100. Furthermore, the generator body 200, the generator output shaft 300 and the power input shaft 100 are coaxially arranged, and such an arrangement can effectively reduce the radial size of the entire power system, can greatly reduce the occupied space when the power system is arranged, so that the space utilization rate is greatly improved, which is beneficial to the manufacturing cost control of the whole vehicle.

[0027] As an example, the longitudinal rear-drive dual-motor hybrid system of the present application also includes a drive motor assembly, which includes a drive motor body 700 and a drive motor output shaft 600 connected to the drive motor body 700, wherein the drive motor output shaft 600 is a hollow shaft, and one end of the power output shaft 800 passes through the inside of the drive motor body 700 and the drive motor output shaft 600 in sequence and is connected to the ring gear connection mechanism 405, which can also be said that the drive motor body 700 and the drive motor output shaft 600 are hollow sleeved on the power output shaft 800, and the other end of the power output shaft 800 is used to connect the rear-drive wheels to output hybrid power. Further, the drive motor body 700, the drive motor output shaft 600 and the power output shaft 800 are coaxially arranged, and such an arrangement makes the structure of the entire power system simpler, and in actual use, the drive motor assembly can form a single-speed ratio output with the wheel, and no longer needs to set up a complex control system to achieve optimal use of energy. The structure of the entire power system is simpler, which is conducive to reducing the manufacturing cost of the whole vehicle, and thus can greatly improve market competitiveness.

[0028] As an example, the longitudinal rear-wheel drive dual-motor hybrid system of the present application also includes a drive motor reduction device 500, which is located between the drive motor assembly and the planetary gear assembly 400. Specifically, the drive motor reduction device 500 includes a driving gear 501, a driven gear 502 meshing with the driving gear 501, an intermediate shaft 503 connected to the driven gear 502, an output pinion 504 connected to an end of the intermediate shaft 503 away from the driven gear 502, and an output gear 505 meshing with the output pinion 504. The end of the drive motor output shaft 600 away from the drive motor body 700 is connected to the driving gear 501, and the end of the power output shaft 800 close to the ring gear connection mechanism 405 is connected to the output gear 505.

[0029] Furthermore, the intermediate shaft 503 is arranged in parallel with the power output shaft 800. Such an arrangement can minimize the arrangement width of the drive motor reduction device 500 in the radial direction of the power output shaft 800, so that the entire power system can be more compact to meet the requirements of automotive applications with limited space. Furthermore, the connection between the intermediate shaft 503 and the driven gear 502 and the output pinion 504 is a hard connection, respectively, to achieve the synchronous rotation of the driven gear 502, the output pinion 504 and the intermediate shaft 503, and the connection between the power output shaft 800 and the output large gear 505 is a hard connection, to achieve the synchronous rotation of the output large gear 505 and the power output shaft 800.

[0030] Furthermore, the power input shaft 100 and the power output shaft 800 are coaxially arranged. This arrangement can effectively reduce the radial dimension of the power system, making the power system structure more compact and meeting the requirements of automotive applications with limited space.

[0031] In actual use, the assembly process of the longitudinal rear-wheel drive dual-motor hybrid system of the present application can be as follows: first, the power input shaft 100 and the generator assembly are connected by a planetary gear assembly 400, specifically, the sun gear 401 is connected to the generator output shaft 300, the middle part of the planetary carrier 402 is connected to the power input shaft 100, and the ring gear 404 is connected to one end of the power output shaft 800 through the ring gear connection mechanism 405. Such a connection method can achieve the function of power diversion while reducing the layout length; then, the drive motor assembly and the power output shaft 800 are arranged coaxially with an offset, specifically, the drive motor body 700 and the drive motor output shaft 600 are empty sleeved on the power output shaft 800, and the drive motor body 700, the drive motor output shaft 600, and the power output shaft 800 are arranged coaxially, and the end of the power output shaft 800 away from the drive motor body 700 is used to connect the rear-wheel drive wheel; finally, the power input shaft 100 and the power output shaft 800 are arranged coaxially.

[0032] The present invention also provides a vehicle, comprising the longitudinal rear-wheel drive dual-motor hybrid power system.

[0033] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0034] The above-described embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of application of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention application shall be subject to the attached claims.

Claims

1. A longitudinal rear-drive dual-motor hybrid power system, characterized in that: It includes a power input shaft, a generator assembly, a planetary gear assembly and a power output shaft, wherein the generator assembly includes a generator body and a generator output shaft connected to the generator body, the planetary gear assembly includes a planet carrier, planetary gears arranged on the planet carrier, a sun gear and a ring gear meshing with the planetary gears, and a ring gear connecting mechanism connected to the ring gear, wherein one end of the generator output shaft away from the generator body is connected to the sun gear, the planet carrier is connected to the power input shaft, and the ring gear is connected to the power output shaft via the ring gear connecting mechanism.

2. The longitudinal rear-drive dual-motor hybrid power system according to claim 1, characterized in that: The generator output shaft is a hollow shaft, and one end of the power input shaft passes through the generator body and the generator output shaft in sequence and is connected to the planet carrier.

3. The longitudinal rear-drive dual-motor hybrid power system according to claim 2, characterized in that: The generator body, the generator output shaft and the power input shaft are coaxially arranged.

4. The longitudinal rear-drive dual-motor hybrid power system according to claim 1, characterized in that: The longitudinal rear-wheel drive dual-motor hybrid system also includes a drive motor assembly, which includes a drive motor body and a drive motor output shaft connected to the drive motor body, wherein the drive motor output shaft is a hollow shaft, and one end of the power output shaft passes through the interior of the drive motor body and the drive motor output shaft in sequence and is connected to the ring gear connection mechanism.

5. The longitudinal rear-drive dual-motor hybrid power system according to claim 4, characterized in that: The drive motor body, the drive motor output shaft and the power output shaft are coaxially arranged.

6. The longitudinal rear-drive dual-motor hybrid power system according to claim 4, characterized in that: The longitudinal rear-drive dual-motor hybrid system also includes a drive motor reduction device, which is located between the drive motor assembly and the planetary gear assembly. The drive motor reduction device includes a driving gear, a driven gear meshing with the driving gear, an intermediate shaft connected to the driven gear, an output pinion connected to an end of the intermediate shaft away from the driven gear, and an output gear meshing with the output pinion. An end of the drive motor output shaft away from the drive motor body is connected to the driving gear, and an end of the power output shaft close to the ring gear connection mechanism is connected to the output gear.

7. The longitudinal rear-drive dual-motor hybrid power system according to claim 6, characterized in that: The intermediate shaft is arranged in parallel with the power output shaft.

8. The longitudinal rear-drive dual-motor hybrid power system according to claim 6, characterized in that: The connection between the intermediate shaft and the driven gear and the output pinion is a hard connection respectively, and the connection between the power output shaft and the output gear is a hard connection.

9. The longitudinal rear-drive dual-motor hybrid power system according to claim 1, characterized in that: The power input shaft and the power output shaft are coaxially arranged.

10. A vehicle, characterized in that: A longitudinal rear-wheel drive dual-motor hybrid power system comprising any one of claims 1 to 9.

Images