Hybrid power system and vehicle

Abstract

This application proposes a hybrid power system and a vehicle. The hybrid power system includes: a planetary gear assembly comprising a sun gear, a planet carrier, a plurality of planetary gears, and a ring gear; a dual-rotor motor comprising an inner motor unit and an outer motor unit, the outer motor unit being disposed radially outside the inner motor unit, the inner rotor of the inner motor unit being connected to the sun gear via an inner rotor shaft, the outer rotor shaft being sleeved radially outside the inner rotor shaft, and the outer rotor of the outer motor unit being connected to the outer rotor shaft; an internal combustion engine, the output shaft of which is connected to the planet carrier; and a clutch disposed between the inner rotor shaft and the outer rotor shaft, thereby enabling the inner rotor shaft and the outer rotor shaft to be connected or disconnected in a transmission manner.

Description

Technical Field

[0001] This application belongs to the field of hybrid vehicles, and particularly relates to a hybrid system and vehicle. Background Technology

[0002] CN114761265A proposes a drive unit and drive assembly, wherein the first shaft of a first electric rotating machine and the output element of an internal combustion engine are driven by gears and a ring gear. Utility Model Content

[0003] This application aims to propose a hybrid power system that can withstand greater loads and speeds.

[0004] An embodiment of this application proposes a hybrid power system, comprising:

[0005] A planetary gear assembly, comprising a sun gear, a planet carrier, multiple planet gears, and a ring gear;

[0006] A dual-rotor motor, comprising an inner motor unit and an outer motor unit, wherein the outer motor unit is disposed radially outside the inner motor unit, the inner rotor of the inner motor unit is connected to the sun gear via an inner rotor shaft, the outer rotor shaft is sleeved radially outside the inner rotor shaft, and the outer rotor of the outer motor unit is connected to the outer rotor shaft;

[0007] An internal combustion engine, wherein the output shaft of the internal combustion engine is connected to the planetary carrier; and

[0008] A clutch is disposed between the inner rotor shaft and the outer rotor shaft, thereby enabling the inner rotor shaft and the outer rotor shaft to be connected or disconnected in a transmission manner.

[0009] In at least one possible implementation, the hybrid power system further includes an intermediate shaft, a differential, a first transmission stage, and a second transmission stage.

[0010] The intermediate shaft, the differential half-shaft, the inner rotor shaft, and the outer rotor shaft are arranged in parallel.

[0011] The first transmission stage is disposed between the outer rotor shaft and the intermediate shaft, thereby enabling power to be transmitted from the outer rotor shaft to the intermediate shaft.

[0012] The second transmission stage is disposed between the intermediate shaft and the differential, thereby enabling power to be transmitted from the intermediate shaft to the differential via the second transmission stage.

[0013] In at least one possible implementation, the first transmission stage includes a first gear and a second gear, the first gear being connected to the outer rotor shaft, and the second gear being connected to the intermediate shaft, wherein the first gear and the second gear mesh.

[0014] The second transmission stage includes a third gear and a fourth gear, the third gear being connected to the intermediate shaft and the fourth gear being connected to the differential, the third gear and the fourth gear meshing.

[0015] In at least one possible implementation, the clutch is located axially between the first gear and the body of the motor in the hybrid power system.

[0016] In at least one possible implementation, the inner rotor shaft and the output shaft of the internal combustion engine are coaxial.

[0017] In at least one possible implementation, the outer rotor of the outer motor unit is fixedly connected to the outer rotor shaft via an outer rotor frame.

[0018] In at least one possible implementation, the internal combustion engine and the dual-rotor motor are located on opposite axial sides of the planetary gear assembly and the first transmission stage, respectively.

[0019] In at least one possible implementation, the inner stator of the inner motor unit and the outer stator of the outer motor unit share a common stator core.

[0020] In at least one possible implementation, the hybrid power system further includes a shock absorber, through which the output shaft of the internal combustion engine is connected to the planetary carrier.

[0021] The embodiments of this application also propose a vehicle including a hybrid power system as described in any of the above technical solutions.

[0022] By adopting the above technical solution, the gear ring can bear the load evenly by meshing with multiple planetary gears, thereby being able to withstand higher loads and speeds. Attached Figure Description

[0023] Figure 1 A schematic diagram of the structure of a hybrid power system according to an embodiment of this application is shown.

[0024] Explanation of reference numerals in the attached figures

[0025] 100 Dual-rotor motor; 101 Inner motor unit; 102 Outer motor unit; 103 Outer rotor frame; 104 Inner rotor shaft; 105 Outer rotor shaft

[0026] 1 internal combustion engine 11 output shaft

[0027] 2 shock absorbers

[0028] 3. Planetary gear assembly 31. Sun gear 32. Planet carrier 33. Planetary gear 34. Ring gear

[0029] 4. Clutch

[0030] 5. Intermediate Shaft

[0031] 6. Differential; 61. Half-shaft

[0032] 7 First transmission stage 71 First gear 72 Second gear

[0033] 8 Second transmission stage 81 Third gear 82 Fourth gear Detailed Implementation

[0034] To more clearly illustrate the above-mentioned objectives, features, and advantages of this application, specific embodiments of this application are described in detail in conjunction with the accompanying drawings in this section. Besides the embodiments described in this section, this application can also be implemented in other different ways. Those skilled in the art can make corresponding improvements, modifications, and substitutions without departing from the spirit of this application; therefore, this application is not limited to the specific embodiments disclosed in this section. The scope of protection of this application should be determined by the claims.

[0035] like Figure 1 As shown, embodiments of this application propose a vehicle including a hybrid power system for driving wheels or recovering power from the wheels. The hybrid power system includes a dual-rotor motor 100, an internal combustion engine 1, a shock absorber 2, a planetary gear assembly 3, a clutch 4, an intermediate shaft 5, a differential 6, a first transmission stage 7, and a second transmission stage 8.

[0036] The dual-rotor motor 100 includes an inner motor unit 101 and an outer motor unit 102, which are coaxially arranged. The outer motor unit 102 can be located radially outside the inner motor unit 101. The inner motor unit 101 includes an inner stator and an inner rotor, with the inner rotor located radially inside the inner stator. The outer motor unit 102 includes an outer stator and an outer rotor, with the outer rotor located radially outside the outer stator. The inner and outer rotors can be coaxially arranged. The inner and outer stators can share a single stator core, which helps to increase the power density of the dual-rotor motor 100 and makes the hybrid power system more compact.

[0037] The inner rotor can be fixedly connected to the inner rotor shaft 104, and the outer rotor can be fixedly connected to the outer rotor shaft 105 through the outer rotor frame 103. The outer rotor shaft 105 is a hollow shaft and can be sleeved on the radial outside of the inner rotor shaft 104. The inner rotor shaft 104 and the outer rotor shaft 105 are coaxially arranged.

[0038] The planetary gear assembly 3 includes a sun gear 31, a planet carrier 32, a plurality of planetary gears 33, and a ring gear 34. The plurality of planetary gears 33 are rotatably mounted on the planet carrier 32 relative to the planet carrier 32. The sun gear 31 is located at the center of the ring gear 34, and the plurality of planetary gears 33 surround the sun gear 31, meshing with both the sun gear 31 and the ring gear 34. The sun gear 31 can be torsionally (i.e., capable of transmitting torque) connected to the inner rotor shaft 104. The ring gear 34 can be fixedly connected to the housing of the hybrid power system.

[0039] The output shaft 11 of the internal combustion engine 1 can be connected to the planet carrier 32, thereby transmitting the power of the internal combustion engine 1 to the planet carrier 32, and then transmitting the power to the sun gear 31 through the planet carrier 32. The inner rotor shaft 104 and the output shaft 11 of the internal combustion engine 1 are coaxial.

[0040] In the circumferential direction of the planetary gear assembly 3, the ring gear 34 evenly bears the load by meshing with multiple planetary gears 33, eliminating the risk of load bias and thus enabling it to withstand the higher power (load) and higher speed output of the internal combustion engine 1. Furthermore, the speed difference between the sun gear 31 and the planet carrier 32 of the planetary gear assembly 3 can be relatively large, resulting in a large transmission ratio.

[0041] Optionally, the output shaft 11 of the internal combustion engine 1 can be connected to the planetary carrier 32 via the shock absorber 2.

[0042] The intermediate shaft 5 is arranged in parallel with the inner rotor shaft 104 and the outer rotor shaft 105.

[0043] The first transmission stage 7 can be disposed between the outer rotor shaft 105 and the intermediate shaft 5, thereby transmitting power from the outer rotor shaft 105 to the intermediate shaft 5. The first transmission stage 7 can be a gear pair, including a first gear 71 and a second gear 72. The first gear 71 can be connected to the outer rotor shaft 105, and the second gear 72 can be connected to the intermediate shaft 5. The first gear 71 and the second gear 72 mesh, thereby transmitting power from the outer rotor shaft 105 to the intermediate shaft 5 through the first transmission stage 7.

[0044] The internal combustion engine 1 and the dual rotor motor 100 can be located on opposite sides of the planetary gear assembly 3 and the first transmission stage 7, respectively.

[0045] The second transmission stage 8 can be disposed between the intermediate shaft 5 and the differential 6, thereby transmitting power from the intermediate shaft 5 to the differential 6. The intermediate shaft 5 and the half-shaft 61 of the differential are parallel. The second transmission stage 8 can be a gear pair, including a third gear 81 and a fourth gear 82. The third gear 81 can be connected to the intermediate shaft 5, and the fourth gear 82 can be connected to the differential 6, for example, it can be torsionally connected to the housing of the differential 6. The third gear 81 and the fourth gear 82 mesh, thereby transmitting the rotation and torque of the intermediate shaft 5 to the differential 6 through the second transmission stage 8.

[0046] Clutch 4 can be disposed between the inner rotor shaft 104 and the outer rotor shaft 105, thereby enabling or disengaging the transmission connection between the inner rotor shaft 104 and the outer rotor shaft 105. Furthermore, clutch 4 can control the sun gear 31 and the first gear 71 to be connected to each other without torque or to operate independently. Clutch 4 may include a first clutch portion and a second clutch portion. The first clutch portion may be connected to the inner rotor shaft 104, and the second clutch portion may be connected to the outer rotor shaft 105. Accordingly, the torque transmission path between the inner rotor shaft 104 and the outer rotor shaft 105 can be formed or disconnected by means of clutch 4.

[0047] When clutch 4 is engaged, power transmission is possible between the inner rotor shaft 104 (internal combustion engine 1) and the outer rotor shaft 105, enabling the internal combustion engine 1 to output power and torque to the outer rotor shaft 105. When clutch 4 is disengaged, power transmission between the inner rotor shaft 104 (internal combustion engine 1) and the outer rotor shaft 105 is disconnected, and the internal combustion engine 1 can only output power and torque to the inner rotor shaft 104.

[0048] In the axial direction A of the hybrid power system, the clutch 4 can be located between the first gear 71 and the main body of the motor 100 (including the inner stator, inner rotor, outer stator, and outer rotor).

[0049] By controlling the engagement or disengagement of clutch 4, and combining the operating state of internal combustion engine 1 with the vehicle's driving state, the hybrid system can switch between multiple operating modes.

[0050] In pure electric drive mode, clutch 4 is disengaged, and external motor unit 102 transmits power to differential 6 through external rotor shaft 105, first transmission stage 7 and second transmission stage 8.

[0051] In series mode, clutch 4 is disengaged, and external motor unit 102 transmits power to differential 6 via external rotor shaft 105, first transmission stage 7, and second transmission stage 8. Internal combustion engine 1 transmits power to internal motor unit 101 via planetary gear assembly 3 and internal rotor shaft 104, and internal motor unit 101 can act as a generator to charge the battery.

[0052] In energy recovery mode, clutch 4 is disengaged, and the power of differential 6 (i.e., the power from the wheels) is transmitted to external motor unit 102 through second transmission stage 8, first transmission stage 7 and external rotor shaft 105. External motor unit 102 can act as a generator to charge the battery.

[0053] In engine-driven mode, clutch 4 engages, and internal combustion engine 1 transmits power to differential 6 via planetary gear assembly 3, clutch 4, first transmission stage 7, and second transmission stage 8. Furthermore, a portion of the power from internal combustion engine 1 can be transmitted to internal motor unit 101 via planetary gear assembly 3 and internal rotor shaft 104. Internal motor unit 101 can function as a generator to charge the battery.

[0054] In a parallel operation mode, clutch 4 engages, and internal combustion engine 1 transmits power to differential 6 via planetary gear assembly 3, clutch 4, first transmission stage 7, and second transmission stage 8. External motor unit 102 also transmits power to differential 6 via first transmission stage 7 and second transmission stage 8. A portion of the power from internal combustion engine 1 is transmitted to internal motor unit 101 via planetary gear assembly 3 and internal rotor shaft 104, and internal motor unit 101 can function as a generator to charge the battery.

[0055] In another parallel mode, clutch 4 engages, and internal combustion engine 1 transmits power to differential 6 via planetary gear assembly 3, clutch 4, first transmission stage 7, and second transmission stage 8. External motor unit 102 transmits power to differential 6 via external rotor shaft 105, first transmission stage 7, and second transmission stage 8. Internal motor unit 101 transmits power to differential 6 via internal rotor shaft 104, first transmission stage 7, and second transmission stage 8.

[0056] It should be understood that at least some aspects or features of the above-described implementation methods, embodiments, or examples can be appropriately combined.

[0057] It is understood that, in this application, when the number of parts or components is not specifically limited, the number can be one or more, where multiple refers to two or more. For cases where the number of parts or components shown in the drawings and / or described in the specification is, for example, two, three, four, etc., this specific number is generally exemplary and not restrictive, and can be understood as multiple, i.e., two or more; however, this does not mean that this application excludes the case of one.

[0058] In this application, unless otherwise expressly stated or limited, terms such as "installation," "assembly," "connection," "linking," "joining," "linking," "abutment," "communication," "connection," "conduction," "fixing," and "fastening" should be interpreted broadly, for example, they can be direct or indirect. For instance, regarding connection, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal communication of two components or the interaction between two components, unless otherwise expressly stated or limited. For instance, regarding communication / conduction, it can be direct communication / conduction or indirect communication / conduction through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0059] In this application, unless otherwise expressly stated or limited, a component being disposed / installed / located / enclosed / placed within, inside, or incorporated in another component can be either of the following two situations: a portion or a majority of the one component is located within the other component; or the one component is completely enclosed within the other component.

[0060] Although the present application has been described in detail using the above embodiments, it will be apparent to those skilled in the art that the present application is not limited to the embodiments described herein. The present application can be modified and implemented as alternative embodiments without departing from the spirit and scope of the present application as defined by the claims. Therefore, the description in this specification is for illustrative purposes only and does not have any limiting meaning for the present application.

Claims

1. A hybrid system characterized by comprising: include: A planetary gear assembly, comprising a sun gear, a planet carrier, multiple planet gears, and a ring gear; A dual-rotor motor, comprising an inner motor unit and an outer motor unit, wherein the outer motor unit is disposed radially outside the inner motor unit, the inner rotor of the inner motor unit is connected to the sun gear via an inner rotor shaft, the outer rotor shaft is sleeved radially outside the inner rotor shaft, and the outer rotor of the outer motor unit is connected to the outer rotor shaft; An internal combustion engine, wherein the output shaft of the internal combustion engine is connected to the planetary carrier; as well as A clutch is disposed between the inner rotor shaft and the outer rotor shaft, thereby enabling the inner rotor shaft and the outer rotor shaft to be connected or disconnected in a transmission manner.

2. The hybrid system according to claim 1, characterized by The hybrid power system also includes an intermediate shaft, a differential, a first transmission stage, and a second transmission stage. The intermediate shaft, the differential half-shaft, the inner rotor shaft, and the outer rotor shaft are arranged in parallel. The first transmission stage is disposed between the outer rotor shaft and the intermediate shaft, thereby enabling power to be transmitted from the outer rotor shaft to the intermediate shaft. The second transmission stage is disposed between the intermediate shaft and the differential, thereby enabling power to be transmitted from the intermediate shaft to the differential via the second transmission stage.

3. The hybrid power system according to claim 2, characterized in that, The first transmission stage includes a first gear and a second gear. The first gear is connected to the outer rotor shaft, and the second gear is connected to the intermediate shaft. The first gear and the second gear mesh. The second transmission stage includes a third gear and a fourth gear, the third gear being connected to the intermediate shaft and the fourth gear being connected to the differential, the third gear and the fourth gear meshing.

4. The hybrid system according to claim 3, characterized by In the axial direction of the hybrid power system, the clutch is located between the first gear and the main body of the motor.

5. The hybrid system of claim 1, wherein, The inner rotor shaft and the output shaft of the internal combustion engine are coaxial.

6. The hybrid system of claim 1, wherein, The outer rotor of the external motor unit is fixedly connected to the outer rotor shaft via an outer rotor frame.

7. The hybrid system of claim 2, wherein, The internal combustion engine and the dual rotor motor are located on opposite sides of the planetary gear assembly and the first transmission stage, respectively.

8. The hybrid system of claim 1, wherein, The inner stator of the inner motor unit and the outer stator of the outer motor unit share a common stator core.

9. The hybrid system of claim 1, wherein, The hybrid power system also includes a shock absorber, through which the output shaft of the internal combustion engine is connected to the planetary carrier.

10. A vehicle characterized by comprising: The hybrid power system includes any one of claims 1 to 9.

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