Hybrid power driving system and vehicle

Abstract

The utility model provides a hybrid power driving system and a vehicle, the hybrid power driving system comprises an engine, a planet row, a first motor, a second motor, a transmission mechanism and a differential mechanism, and the engine is provided with an engine output shaft; the first motor comprises a first rotor and a first stator, the first rotor is coaxially and fixedly connected with a first rotor shaft, and the first rotor shaft and the sun gear are connected and coaxially arranged; the second motor comprises a second rotor and a second stator, the second stator is fixedly arranged, the second rotor is coaxially and fixedly connected with a second rotor shaft, the interior of the second rotor shaft is of a hollow structure, the second rotor shaft is provided with a first gear, and the first rotor shaft penetrates through the hollow space in the second rotor shaft to be connected with the sun gear; the first rotor shaft and the second rotor shaft are coaxially arranged; the transmission mechanism is in transmission connection with the first gear; the differential is in transmission connection with the first gear through a transmission mechanism. According to the hybrid power driving system and the vehicle, the system structure is compact, and arrangement is convenient.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, specifically to hybrid drive systems and vehicles. Background Technology

[0002] In currently known hybrid drive systems, the engine, generator, and drive motor are typically arranged in a parallel-axis configuration. However, this parallel-axis hybrid drive system results in larger dimensions in both the x and z directions of the vehicle, making the overall structure less compact and difficult to arrange within the limited space of the vehicle. Utility Model Content

[0003] To at least partially solve the above problems, according to a first aspect of this application, embodiments of this application provide a hybrid power drive system, comprising: an engine having an engine output shaft; a planetary gear set including a ring gear, a planet carrier, a sun gear, and a plurality of planet gears, the ring gear being fixedly disposed, the planet gears being rotatably disposed on the planet carrier, the planet gears simultaneously meshing with the ring gear and the sun gear, the planet carrier being connected to and coaxially disposed with the engine output shaft; and a first motor including a first rotor and a first stator, the first stator being fixedly disposed, and a first rotor shaft being coaxially fixedly connected to the first rotor. A rotor shaft is connected to and coaxially arranged with a sun gear; a second motor, the second motor including a second rotor and a second stator, the second stator being fixedly arranged, and a second rotor shaft being coaxially fixedly connected to the second rotor, the second rotor shaft having a hollow internal structure, and a first gear being arranged on the second rotor shaft, wherein the first rotor shaft passes through the hollow space inside the second rotor shaft and is connected to the sun gear, and the first rotor shaft and the second rotor shaft are coaxially arranged; a transmission mechanism, the transmission mechanism being drivenly connected to the first gear; a differential, the differential being drivenly connected to the first gear through the transmission mechanism, and the differential being used for drively connecting to the vehicle's wheels.

[0004] In some embodiments, the second rotor is sleeved on the hollow rotor hub, the second rotor shaft is connected to one side of the rotor hub, the second rotor shaft is coaxial with the rotor hub, the rotor hub and the second rotor shaft are internally connected, and the first motor is disposed in the hollow space inside the rotor hub.

[0005] In some embodiments, the hybrid drive system further includes a first bearing disposed at the end of the rotor hub away from the second rotor shaft.

[0006] In some embodiments, the hybrid drive system further includes a synchronization mechanism, which includes an active end and a passive end that can be controlled to engage or disengage. The active end is disposed on a first rotor shaft and the passive end is disposed on a second rotor shaft.

[0007] In some embodiments, the synchronizing mechanism is one of a synchronizer, an electromagnetic clutch, or a multi-plate wet clutch.

[0008] In some embodiments, the transmission mechanism includes a second gear, an intermediate shaft, a third gear, and a fourth gear; the second gear and the third gear are fixedly mounted on the intermediate shaft, the second gear meshes with the first gear, and the third gear meshes with the fourth gear; the fourth gear is fixedly connected to the differential.

[0009] In some embodiments, the hybrid drive system further includes a shock absorber disposed on the engine output shaft.

[0010] In some embodiments, the hybrid drive system further includes a second bearing, which is sleeved on the end of the engine output shaft that connects to the planetary carrier.

[0011] In some embodiments, the hybrid drive system further includes a third bearing, a fourth bearing, and a fifth bearing. The third bearing and the fourth bearing are located inside the second rotor shaft and are respectively sleeved on the first rotor shaft. The third bearing is located inside the end of the second rotor shaft away from the rotor hub, the fourth bearing is located inside the end of the second rotor shaft near the rotor hub, and the fifth bearing is located at the end of the first rotor shaft away from the second rotor shaft.

[0012] According to a second aspect of this application, embodiments of this application also provide a vehicle including a hybrid drive system provided in any embodiment of the first aspect of this application.

[0013] The hybrid drive system and vehicle provided in the embodiments of this application have the engine, the first motor and the second motor arranged coaxially, which makes the system structure compact and easy to arrange. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of a hybrid power drive system provided in an embodiment of this application.

[0016] The attached figures are labeled as follows:

[0017] Engine 1; Shock absorber 2; Engine output shaft 3; Second bearing 4; Planet carrier 5; Planet gear 6; Ring gear 7; Sun gear 8; Driving end 9; First rotor shaft 10; Driven end 11; First gear 12; Second rotor shaft 13; Third bearing 14; Sixth bearing 15; Seventh bearing 16; Rotor hub 17; Second stator 18; Second rotor 19; First stator 20; First rotor 21; Fifth bearing 22; Second gear 23; Third gear 24; Intermediate shaft 25; Fourth gear 26; Differential 27.

[0018] It should be understood that the dimensions of the various parts shown in the accompanying drawings are not drawn to actual scale. Furthermore, the same or similar reference numerals denote the same or similar components. Detailed Implementation

[0019] The preferred embodiments of this application will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are merely some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection claimed in this application.

[0020] The terms "first," "second," and similar words used in this application do not indicate any order, quantity, or importance, but are merely used to distinguish different parts. Words such as "including" or "contains" mean that the element preceding the word encompasses the element listed after it, and do not exclude the possibility of encompassing other elements as well. Terms such as "above," "below," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, this relative positional relationship may also change accordingly.

[0021] like Figure 1 As shown, according to a first aspect of this application, an embodiment of this application provides a hybrid power drive system. The hybrid power drive system includes: an engine 1, a planetary gear set, a first motor, a second motor, a transmission mechanism, and a differential 27.

[0022] Engine 1 has an engine output shaft 3, through which engine 1 outputs power. The planetary gear set includes a ring gear 7, a planet carrier 5, a sun gear 8, and multiple planet gears 6. The ring gear 7 is fixed, meaning it cannot rotate in the planetary gear set. The planet gears 6 are rotatably mounted on the planet carrier 5, meshing with both the ring gear 7 and the sun gear 8. The planet carrier 5 is connected to and coaxially mounted with the engine output shaft 3. The first motor includes a first rotor 21 and a first stator 20. The first stator 20 is fixed, and a first rotor shaft 10 is coaxially fixedly connected to the first rotor 21. The first rotor shaft 10 is connected to and coaxially mounted with the sun gear 8. The second motor includes a second rotor 19 and a second stator 18. The stator 18 is fixedly mounted, and a second rotor shaft 13 is coaxially fixedly connected to the second rotor 19. The second rotor shaft 13 has a hollow internal structure, and a first gear 12 is mounted on the second rotor shaft 13. The first rotor shaft 10 passes through the hollow space inside the second rotor shaft 13 and is connected to the sun gear 8. The first rotor shaft 10 and the second rotor shaft 13 are coaxially mounted. The transmission mechanism is driven by the first gear 12. The differential 27 is driven by the transmission mechanism and is also used to drive the vehicle's wheels to transmit the power of the hybrid drive system to the vehicle's wheels. In this embodiment, the first rotor shaft 10, the second rotor shaft 13, and the engine output shaft 3 are coaxially mounted, thereby achieving a coaxial arrangement of the engine 1, the first motor, and the second electric motor. Preferably, the planetary gear set is configured so that the engine 1 and the first motor can increase their speed through the planetary gear set, which can reduce the peak torque of the first motor and thus further reduce the axial dimension of the first motor.

[0023] The hybrid drive system provided in the embodiments of this application has an engine 1, a first motor and a second motor arranged coaxially, which makes the system structure compact, reduces the size of the system in the x and z directions of the vehicle, and facilitates the layout.

[0024] In some embodiments, the second rotor 19 is fitted onto the hollow rotor hub 17, and the second rotor shaft 13 is connected to one side of the rotor hub 17. The second rotor shaft 13 and the rotor hub 17 are coaxially arranged, and the interiors of the rotor hub 17 and the second rotor shaft 13 are connected. The first motor is disposed in the hollow space inside the rotor hub 17. The rotor hub 17 can be a hollow cylinder with a base plate or bracket on one bottom surface to facilitate the placement of the second rotor shaft 13. In this embodiment, the first motor and the second motor are arranged internally and externally, which further reduces the axial dimension (i.e., the dimension of the system in the y-direction of the vehicle) and makes the structure more compact. At the same time, this arrangement can reduce the scrap rate of the motor silicon steel sheets and reduce costs.

[0025] In some embodiments, the hybrid drive system further includes a first bearing, which is sleeved on the end of the rotor hub 17 away from the second rotor shaft 13. In this embodiment, by providing the first bearing, the end of the rotor hub 17 away from the second rotor shaft 13 can be better supported, so that both ends of the second rotor 19 of the second motor are supported, and the support reliability is improved.

[0026] Combination Figure 1 In some embodiments, the hybrid drive system further includes a synchronization mechanism, which includes an active end 9 and a passive end 11. The active end 9 and the passive end 11 can be controlled to engage or disengage. The active end 9 is disposed on the first rotor shaft 10, and the passive end 11 is disposed on the second rotor shaft 13. In some embodiments, the synchronization mechanism is one of a synchronizer, an electromagnetic clutch, or a multi-plate wet clutch. In this embodiment, by setting a synchronization mechanism, the power of the engine 1 can be directly transmitted to the second rotor shaft 13, thereby realizing the transmission of power to the wheels through the first gear 12 on the second rotor shaft 13. With this arrangement, the engine 1 and the second motor can share the first gear 12 when outputting power, reducing the number of gear parts and making the structure more compact.

[0027] Of course, in other embodiments, the hybrid drive system may not include a synchronization mechanism. In this case, the hybrid drive system can be applied to range-extended vehicles to reduce vehicle costs.

[0028] In some embodiments, the transmission mechanism includes a second gear 23, an intermediate shaft 25, a third gear 24, and a fourth gear 26. The second gear 23 and the third gear 24 are fixedly mounted on the intermediate shaft 25, and power is transmitted between them through the intermediate shaft 25. The second gear 23 meshes with the first gear 12, and the third gear 24 meshes with the fourth gear 26. The fourth gear 26 is fixedly connected to the differential 27. In this embodiment, the fourth gear 26 has more teeth than the second gear 23, and the second gear 23 has more teeth than the third gear 24, thereby achieving a speed reduction design from the hybrid drive system to the wheels.

[0029] In some embodiments, the hybrid drive system further includes a shock absorber 2 disposed on the engine output shaft 3. In this embodiment, the shock absorber 2 can reduce the vibration of the engine 1, thereby improving the comfort of the vehicle.

[0030] In some embodiments, the hybrid drive system further includes a second bearing 4, which is sleeved on the end of the engine output shaft 3 that connects to the planetary carrier 5. In this embodiment, by providing the second bearing 4, the engine output shaft 3 can be supported, thereby achieving reliable power transmission.

[0031] In some embodiments, the hybrid drive system further includes a third bearing 14, a fourth bearing, and a fifth bearing 22. The third bearing 14 and the fourth bearing are located inside the second rotor shaft 13 and respectively sleeved on the first rotor shaft 10. The third bearing 14 is located on the inner side of the end of the second rotor shaft 13 away from the rotor hub 17, the fourth bearing is located on the inner side of the end of the second rotor shaft 13 near the rotor hub 17, and the fifth bearing 22 is located on the end of the first rotor shaft 10 away from the second rotor shaft 13. In this embodiment, the third bearing 14 and the fifth bearing 22 can provide support for both ends of the first rotor shaft 10, while the fourth bearing further strengthens the support near the rotor hub 17, making the support reliability of the second rotor shaft 13 higher.

[0032] In some embodiments, the hybrid drive system further includes a sixth bearing 15 and a seventh bearing 16, which are disposed at one end of the second rotor shaft 13 near the rotor hub 17. In this embodiment, by providing two bearings, the sixth bearing 15 and the seventh bearing 16, to support the second rotor shaft 13, the support for the second rotor shaft 13 can be made more reliable.

[0033] According to a second aspect of this application, embodiments of this application also provide a vehicle including a hybrid drive system provided in any embodiment of the first aspect of this application.

[0034] The working principle of the hybrid drive system provided in the embodiments of this application is described below:

[0035] 1. Pure Electric Drive Mode: In this mode, the second motor outputs power, and the output torque of the second motor rotor is transmitted to the rotor hub 17 fixedly connected to it. The second motor rotor hub 17 transmits power to the second rotor shaft 13 fixedly connected to it. The second rotor shaft 13 transmits power to the first gear 12 fixedly connected to it. The first gear 12 transmits power to the second gear 23 meshing with it. The second gear 23 transmits power to the intermediate shaft 25 fixedly connected to it. The intermediate shaft 25 transmits power to the third gear 24 fixedly connected to it. The third gear 24 transmits power to the fourth gear 26 meshing with it. The fourth gear 26 transmits power to the differential 27 fixedly connected to it. The differential 27 outputs power to the left and right wheels, thereby realizing pure electric drive of the vehicle. At this time, the energy source of the second motor is the electrical energy stored in the vehicle battery.

[0036] 2. Engine Start-up: At this time, the first motor outputs power, which is transmitted through the first rotor 21 to the first rotor shaft 10 fixedly connected to it. The first rotor shaft 10 transmits power to the sun gear 8 fixedly connected to it. The sun gear 8 transmits power to the planet gears 6 meshing with it. The planet gears 6 transmit power to the planet carrier 5 connected to it. The planet carrier 5 transmits power to the left half-shaft of the engine output shaft 3 fixedly connected to it. The left half-shaft of the engine output shaft 3 transmits power to the shock absorber 2 fixedly connected to it. The shock absorber 2 transmits power to the right half-shaft of the engine output shaft 3, and finally to the engine 1, driving the engine 1 to rotate, thereby starting the engine 1. At this time, the energy source of the first motor is the electrical energy stored in the vehicle battery.

[0037] 3. Power Generation Mode: After starting, engine 1 outputs power, which is transmitted to engine output shaft 3. Engine output shaft 3 then transmits power to planetary carrier 5, which is fixedly connected to it. Planetary carrier 5 transmits power to planetary gears 6, which mesh with it. Planetary gears 6 transmit power to sun gear 8, which meshes with it. Sun gear 8 transmits power to first rotor shaft 10, which is fixedly connected to it. First rotor shaft 10 transmits power to first rotor 21, thus generating electricity through the first motor. At this time, the second motor can utilize the generated energy from the first motor to output power. The second rotor 19 outputs torque and speed to the rotor hub, which is fixedly connected to it. 17. The rotor hub 17 transmits power to the second rotor shaft 13, which is fixedly connected to it. The second rotor shaft 13 transmits power to the first gear 12, which is fixedly connected to it. The first gear 12 transmits power to the second gear 23, which meshes with it. The second gear 23 transmits power to the intermediate shaft 25, which is fixedly connected to it. The intermediate shaft 25 transmits power to the third gear 24, which is fixedly connected to it. The third gear 24 transmits power to the fourth gear 26, which meshes with it. The fourth gear 26 transmits power to the differential 27, which is fixedly connected to it. The differential 27 outputs power to the left and right wheels, thereby driving the vehicle. In this mode, the active end 9 and the passive end 11 of the synchronization mechanism are separated. The engine 1 can only generate electricity through the first motor and will not output power to the wheel ends.

[0038] 4. Engine Direct Drive Mode: In this mode, engine 1 outputs power to engine output shaft 3. Engine output shaft 3 transmits power to the planetary carrier 5, which is fixedly connected to it. Planetary carrier 5 transmits power to the planet gears 6 meshing with it. Planet gears 6 transmit power to the sun gear 8, which meshes with it. Sun gear 8 transmits power to the first rotor shaft 10, which is fixedly connected to it. First rotor shaft 10 transmits power to the driving end 9 of the synchronization mechanism, which is fixedly connected to it. At this time, the synchronization mechanism engages, and the driving end 9 of the synchronization mechanism transmits power to the synchronizer mechanism meshing with it. The passive end 11 of the synchronization mechanism transmits power to the first gear 12 fixed thereto. The first gear 12 transmits power to the second gear 23 meshing with it. The second gear 23 transmits power to the intermediate shaft 25 fixedly connected thereto. The intermediate shaft 25 transmits power to the third gear 24 fixedly connected thereto. The third gear 24 transmits power to the fourth gear 26 meshing with it. The fourth gear 26 transmits power to the differential 27 fixedly connected thereto. The differential 27 outputs power to the left and right wheels, thereby enabling the engine 1 to directly drive the vehicle.

[0039] 5. Hybrid Drive Mode: In engine 1 direct drive mode, the second motor can simultaneously output power. The second rotor 19 outputs torque to the rotor hub 17, which is fixedly connected to it. The rotor hub 17 transmits power to the second rotor shaft 13, which is fixedly connected to it. The second rotor shaft 13 transmits power to the first gear 12, which is fixedly connected to it. The first gear 12 transmits power to the second gear 23, which meshes with it. The second gear 23 transmits power to the intermediate shaft 25, which is fixedly connected to it. The intermediate shaft 25 transmits power to the third gear 24, which is fixedly connected to it. The third gear 24 transmits power to the fourth gear 26, which meshes with it. The fourth gear 26 transmits power to the differential 27, which is fixedly connected to it. At this time, the power from engine 1 and the power from the second motor are simultaneously output to the differential 27 to drive the vehicle, achieving hybrid drive.

[0040] Based on the various embodiments of this application described above, in the absence of explicit denial or conflict, the technical features of one embodiment may be advantageously combined with one or more other embodiments.

[0041] While specific embodiments of this application have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and are not intended to limit the scope of this application. Those skilled in the art should understand that modifications can be made to the above embodiments or equivalent substitutions can be made to some technical features without departing from the scope and spirit of this application. The scope of this application is defined by the appended claims.

Claims

1. A hybrid drive system characterized by comprising: include: An engine having an engine output shaft; The planetary gear set includes a ring gear, a planet carrier, a sun gear, and multiple planet gears. The ring gear is fixedly mounted, and the planet gears are rotatably mounted on the planet carrier. The planet gears mesh with both the ring gear and the sun gear. The planet carrier is connected to and coaxially mounted with the engine output shaft. The first motor includes a first rotor and a first stator. The first stator is fixedly disposed, and a first rotor shaft is coaxially fixedly connected to the first rotor. The first rotor shaft is connected to and coaxially disposed with the sun gear. The second motor includes a second rotor and a second stator. The second stator is fixedly installed. A second rotor shaft is coaxially fixedly connected to the second rotor. The second rotor shaft has a hollow internal structure. A first gear is installed on the second rotor shaft. The first rotor shaft passes through the hollow space inside the second rotor shaft and is connected to the sun gear. The first rotor shaft and the second rotor shaft are coaxially installed. The transmission mechanism is connected to the first gear transmission; A differential, which is connected to the first gear via the transmission mechanism, and the differential is also used for drive connection with the wheels of the vehicle.

2. The hybrid drive system according to claim 1, characterized in that, The second rotor is fitted onto a hollow rotor hub, and the second rotor shaft is connected to one side of the rotor hub. The second rotor shaft is coaxial with the rotor hub, and the rotor hub and the second rotor shaft are internally connected. The first motor is disposed in the hollow space inside the rotor hub.

3. The hybrid drive system of claim 2, wherein It also includes a first bearing, which is fitted onto the end of the rotor hub away from the second rotor shaft.

4. The hybrid drive system of claim 1, wherein It also includes a synchronization mechanism, which includes an active end and a passive end, the active end and the passive end being able to be controlled to engage or disengage, the active end being disposed on the first rotor shaft and the passive end being disposed on the second rotor shaft.

5. The hybrid drive system of claim 4, wherein The synchronization mechanism is one of a synchronizer, an electromagnetic clutch, or a multi-plate wet clutch.

6. The hybrid drive system of claim 1, wherein The transmission mechanism includes a second gear, an intermediate shaft, a third gear, and a fourth gear; The second gear and the third gear are fixedly mounted on the intermediate shaft. The second gear meshes with the first gear, and the third gear meshes with the fourth gear. The fourth gear is fixedly connected to the differential.

7. The hybrid drive system of claim 1, wherein It also includes a shock absorber, which is mounted on the engine output shaft.

8. The hybrid drive system of claim 1, wherein, It also includes a second bearing, which is sleeved on the end of the engine output shaft that connects to the planetary carrier.

9. The hybrid drive system of claim 2, wherein, It also includes a third bearing, a fourth bearing, and a fifth bearing. The third bearing and the fourth bearing are located inside the second rotor shaft and are respectively sleeved on the first rotor shaft. The third bearing is located on the inner side of the end of the second rotor shaft away from the rotor hub. The fourth bearing is located on the inner side of the end of the second rotor shaft near the rotor hub. The fifth bearing is located on the end of the first rotor shaft away from the second rotor shaft.

10. A vehicle characterized by comprising: A hybrid drive system comprising the hybrid drive system according to any one of claims 1 to 9.

Images