Extended-range vehicle driving system with two-in-one motor and vehicle

Abstract

The utility model provides an extended-range vehicle driving system with a two-in-one motor and a vehicle. The range extending type vehicle driving system comprises a two-in-one motor (10), the two-in-one motor (10) comprises an inner motor (11) and an outer motor (12), the inner motor (11) comprises an inner motor stator (111) and an inner motor rotor (112), the outer motor (12) comprises an outer motor stator (121) and an outer motor rotor (122), and the inner motor stator (111) and the outer motor stator (121) share a stator iron core (110). The engine (20) is connected to the outer motor rotor (122) via a first gear transmission mechanism (30) for driving the outer motor (12) to generate electricity. The inner motor rotor (112) is connected to the differential (50) via a second gearing (40). The inner motor rotor (112) is rotationally connected to the outer motor rotor (122) via a bearing, and the inner motor rotor (112) and the outer motor rotor (122) are completely decoupled.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicle drive systems, and particularly relates to a range-extending vehicle drive system with a two-in-one motor and a vehicle. BACKGROUND

[0002] Motors have been widely used in new energy vehicles. As an example, CN114761265A discloses a drive unit and a drive assembly. Among them, the internal combustion engine and the drive unit (hybrid transmission) are connected through parallel gear sets, and the clutch is arranged on the axial side of the internal motor.

[0003] Some existing technologies use hybrid drive / Plug-in hybrid drive to enable the internal combustion engine to directly drive the vehicle to run. Due to the use of direct drive of the internal combustion engine, the electrification level of the hybrid drive / Plug-in hybrid drive is not as good as that of the pure electric drive / range-extending drive.

[0004] As the situation of direct drive of the internal combustion engine to run becomes less, the direct drive of the internal combustion engine becomes less important for the improvement of the efficiency of the internal combustion engine. There are more and more range-extending electric vehicles on the market, and the battery endurance mileage is also getting longer and longer.

[0005] With the increase of the battery endurance mileage of the range-extending electric vehicle, the pure electric mode becomes more and more important, and the clutch in the transmission will cause drag loss, which will adversely affect the efficiency of the pure electric mode.

[0006] The clutch and its actuation system also increase the cost, increase the complexity of the system, and are not conducive to the optimization of the size and weight of the transmission. CONTENT OF THE INVENTION

[0007] In order to overcome or alleviate the deficiencies of the prior art, one purpose of the present application is to provide a range-extending vehicle drive system with a two-in-one motor, which can improve the transmission efficiency of the system, reduce the energy consumption of the whole vehicle, and also help to reduce the size and weight of the range-extending vehicle drive system, and realize a more compact layout.

[0008] In order to achieve the above-mentioned purpose, the present application can adopt the following technical solutions.

[0009] One embodiment of the present application provides a range-extending vehicle drive system with a two-in-one motor, which comprises:

[0010] The two-in-one motor comprises an internal motor and an external motor, the internal motor comprises an internal motor stator and an internal motor rotor located radially inside the internal motor stator, the external motor comprises an external motor stator and an external motor rotor located radially outside the external motor stator, and the internal motor stator and the external motor stator share a stator core;

[0011] a first gear mechanism, a second gear mechanism and a differential; and

[0012] an engine connected to the outer motor rotor via the first gear mechanism for driving the outer motor generator,

[0013] the inner motor rotor is connected to the differential via the second gear mechanism for driving the vehicle to travel,

[0014] the inner motor rotor is rotatably connected to the outer motor rotor via a bearing, the inner motor rotor and the outer motor rotor are completely decoupled.

[0015] In at least one embodiment, the inner motor rotor is rotatably connected to an outer rotor support via an output shaft of the inner motor and a bearing, the outer rotor support is torsionally connected to the outer motor rotor.

[0016] In at least one embodiment, the stator core comprises a plurality of silicon steel sheets integrally punched, the plurality of silicon steel sheets are stacked to form a core body, an inner circumferential portion of the core body is provided with a plurality of inner stator conductor grooves, and an outer circumferential portion of the core body is provided with a plurality of outer stator conductor grooves.

[0017] In at least one embodiment, the first gear mechanism comprises a first gear pair composed of a first gear and a second gear that are externally engaged with each other, the first gear is connected to the engine, and the second gear is connected to the outer motor rotor via an outer rotor support.

[0018] In at least one embodiment, the first gear is connected to an output shaft of the engine via a support shaft and a damper, the support shaft and the output shaft of the inner motor are arranged parallel to and offset from each other.

[0019] In at least one embodiment, the second gear mechanism comprises a second gear pair, a third gear pair and an intermediate shaft, the second gear pair comprises a third gear and a fourth gear that are engaged with each other, the third gear is coaxially and torsionally connected to the inner motor rotor, the fourth gear is torsionally connected to the intermediate shaft, the third gear pair comprises a fifth gear and a sixth gear that are engaged with each other, the fifth gear is torsionally connected to the intermediate shaft, and the sixth gear constitutes an input gear of the differential.

[0020] In at least one embodiment, the differential comprises two half shafts, the output shaft of the inner motor, the intermediate shaft and the half shafts are parallel to each other.

[0021] In at least one embodiment, the first gear pair and the third gear pair overlap each other, and the second gear pair and the differential overlap each other, as viewed along at least one radial direction of the two-in-one motor.

[0022] In at least one embodiment, the engine and the two-in-one motor are respectively located on axial two sides of the first gear pair and the second gear pair.

[0023] One embodiment of the present application also provides a vehicle comprising the range-extended vehicle drive system with a two-in-one motor of the present application.

[0024] As described above, the embodiments of the present application provide a range-extended vehicle drive system with a two-in-one motor, which uses the two-in-one motor without using a clutch between the motor and the gear transmission mechanism, thus being advantageous for improving system transmission efficiency and reducing vehicle energy consumption; at the same time, being advantageous for reducing the size and weight of the range-extended vehicle drive system, and thus realizing a more compact drive system layout. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 A structural schematic diagram of a range-extended vehicle drive system with a two-in-one motor according to one embodiment of the present application is shown.

[0026] Figure 2 A structural schematic diagram of a stator core of the two-in-one motor in Figure 1 is shown.

[0027] REFERENCE SIGNS

[0028] 10 two-in-one motor;

[0029] 11 inner motor;

[0030] 110 stator core; 117 outer stator conductor slot; 118 inner stator conductor slot; 119 core main body;

[0031] 111 inner motor stator; 112 inner motor rotor; 113 output shaft of the inner motor;

[0032] 12 outer motor;

[0033] 121 outer motor stator; 122 outer motor rotor; 123 outer rotor support;

[0034] 20 engine;

[0035] 21 output shaft of the engine;

[0036] 30 first gear transmission mechanism;

[0037] 31 first gear; 32 second gear; 311 support shaft of the first gear;

[0038] 40 second gear mechanism;

[0039] 41 third gear; 42 fourth gear; 43 fifth gear; 44 sixth gear; 45 intermediate shaft;

[0040] 50 differential;

[0041] 51, 52 half shaft;

[0042] 60 shock absorber;

[0043] A axial; R radial; C circumferential DETAILED DESCRIPTION

[0044] The exemplary embodiments of the present application will be described below with reference to the accompanying drawings. It is to be understood that the specific description is only for the purpose of teaching one skilled in the art how to implement the present application, and is not intended to exhaust all possible ways of implementing the present application, nor to limit the scope of the present application.

[0045] In the present application, "axial", "radial", and "circumferential" respectively represent the axial, radial, and circumferential directions of the two-in-one motor of the present application, unless otherwise specified. Further, "radial outer side" refers to the side away from the center axis of the two-in-one motor along the radial direction, and "radial inner side" refers to the side close to the center axis of the two-in-one motor along the radial direction.

[0046] In the present application, the anti-torsion connection refers to a connection capable of transmitting torque, for example, the anti-torsion connection can be achieved by means of splines, and can also be achieved by means of fixed connection.

[0047] The present application will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0048] As shown in FIGS. 1 and 2, the embodiment of the present application provides a range extended vehicle driving system with a two-in-one motor, which can include a two-in-one motor 10, a first gear mechanism 30, a second gear mechanism 40, a differential 50, and an engine 20. Figure 1 Figure 2 As shown in FIGS. 1 and 2, the embodiment of the present application provides a range extended vehicle driving system with a two-in-one motor, which can include a two-in-one motor 10, a first gear mechanism 30, a second gear mechanism 40, a differential 50, and an engine 20.

[0049] The two-in-one motor 10 can include an inner motor 11 and an outer motor 12, the inner motor 11 including an inner motor stator 111 and an inner motor rotor 112 located on the radial inner side of the inner motor stator 111, and the outer motor 12 including an outer motor stator 121 and an outer motor rotor 122 located on the radial outer side of the outer motor stator 121. The inner motor stator 111 and the outer motor stator 121 can share a stator core 110, i.e., use the same stator core.

[0050] ​The engine 20 can be connected to the outer motor rotor 122 via the first gear transmission 30 for driving the outer motor 12 to generate electricity. Here, the outer motor 12 can also be used to start the engine 20. The engine 20 here can be an internal combustion engine.

[0051] The inner motor rotor 112 can be connected to the differential 50 via the second gear transmission 40 for driving the vehicle to travel. The inner motor rotor 112 can be rotatably connected to the outer motor rotor 122 via a bearing, and the inner motor rotor 112 and the outer motor rotor 122 are completely decoupled. Here, the inner motor rotor 112 and the outer motor rotor 122 being completely decoupled means that the inner motor rotor 112 and the outer motor rotor 122 work or rotate independently of each other.

[0052] As described above, the embodiment of the present application provides a range extending vehicle drive system with a two-in-one motor, which uses a two-in-one motor without using a clutch between the motor and the gear transmission, thus being advantageous for improving system transmission efficiency and reducing vehicle energy consumption; at the same time, it is advantageous for reducing the size and weight of the range extending vehicle drive system, and thus realizing a more compact drive system layout.

[0053] Optionally, the inner motor rotor 112 can be rotatably connected to the outer rotor support 123 via an output shaft 113 of the inner motor 11 and a bearing, and the outer rotor support 123 is torsionally connected to the outer motor rotor 122. Here, the output shaft 113 can be torsionally connected to the inner motor rotor 112.

[0054] Optionally, the stator core 110 includes a plurality of silicon steel sheets integrally punched, and the plurality of silicon steel sheets are stacked to form a core body 119, the inner circumferential part of the core body 119 is provided with a plurality of inner stator conductor grooves 118, and the outer circumferential part of the core body 119 is provided with a plurality of outer stator conductor grooves 117. The plurality of inner stator conductor grooves 118 can be uniformly arranged in the circumferential direction C of the stator core 110. The plurality of outer stator conductor grooves 117 can be uniformly arranged in the circumferential direction C of the stator core 110.

[0055] A conductor can be inserted into the inner stator conductor groove 118 to form an inner motor winding 114, and a conductor can be inserted into the outer stator conductor groove 117 to form an outer motor winding 124. The stator core 110 can be supported (fixedly connected) to the housing of the two-in-one motor 10.

[0056] Here, the inner motor winding 114 and the outer motor winding 124 can be located at the same position in the axial direction A, and the axial lengths of the two can be substantially the same. The inner motor rotor 112 and the outer motor rotor 122 can be located at the same position in the axial direction A, and the axial lengths of the two can be substantially the same.

[0057] Optionally, the first gear mechanism 30 comprises a first gear pair consisting of a first gear 31 and a second gear 32 which are externally meshed with each other, the first gear 31 is connected to the engine 20, and the second gear 32 is connected to the outer motor rotor 122 via the outer motor bracket 123. The first gear mechanism 30 can only have the two gears of the first gear 31 and the second gear 32.

[0058] Optionally, the first gear 31 can be connected to the output shaft 21 of the engine 20 via its support shaft 311 and the damper 60. The support shaft 311 and the output shaft 113 of the inner motor 11 are arranged parallel and staggered to each other. Here, the first gear 31 and the support shaft 311 can be torsionally connected.

[0059] Optionally, the second gear mechanism 40 comprises a second gear pair, a third gear pair and an intermediate shaft 45. The second gear pair comprises a third gear 41 and a fourth gear 42 which are meshed with each other, the third gear 41 is coaxially torsionally connected to the inner motor rotor 112, and the fourth gear 42 is torsionally connected to the intermediate shaft 45. Here, the third gear 41 can be directly connected to the inner motor rotor 112 via the output shaft 113 of the inner motor 11, or alternatively, the third gear 41 can be connected to the output shaft 113 via an additional shaft and a coupling.

[0060] The third gear pair comprises a fifth gear 43 and a sixth gear 44 which are meshed with each other, the fifth gear 43 is torsionally connected to the intermediate shaft 45, and the sixth gear 44 constitutes an input gear of the differential 50 (or alternatively, the final reduction gear of the transmission).

[0061] Optionally, the differential 50 comprises two half shafts 51, 52, the output shaft 113 of the inner motor 11, the intermediate shaft 45 and the half shafts 51, 52 are arranged parallel and staggered to each other.

[0062] Optionally, the first gear pair and the third gear pair overlap each other, and the second gear pair and the differential 50 overlap each other, as viewed along at least one radial direction R of the two-in-one motor 10. Here, the overlap of each other means that there is an occlusion between the first gear pair and the third gear pair, and there is an occlusion between the second gear pair and the differential 50, as viewed along at least one radial direction R of the two-in-one motor 10. Alternatively, the first gear pair and the third gear pair occupy the same position in the axial direction A (the axial dimensions of the first gear pair and the third gear pair do not have to be exactly the same), and the second gear pair and the differential 50 occupy the same position in the axial direction A (the axial dimensions of the second gear pair and the differential 50 do not have to be exactly the same).

[0063] Optionally, the engine 20 and the two-in-one motor 10 are respectively located on the axial two sides of the first gear pair and the second gear pair.

[0064] As described above, the range extending vehicle drive system provided by the embodiments of the present application can have higher system efficiency, which is beneficial to reduce the energy consumption level of the vehicle, reduce the size and weight of the range extending vehicle drive system, and thus realize a more compact drive system layout and reduce the cost.

[0065] The embodiments of the present application also provide a vehicle comprising a range extending vehicle drive system with a two-in-one motor according to the present application.

Claims

1. A range extended vehicle drive system having a two-in-one electric machine, characterized by, Comprising: a two-in-one motor, which comprises an inner motor and an outer motor, the inner motor comprising an inner motor stator and an inner motor rotor located radially inward of the inner motor stator, the outer motor comprising an outer motor stator and an outer motor rotor located radially outward of the outer motor stator, the inner motor stator and the outer motor stator sharing a stator core; a first gear transmission, a second gear transmission and a differential; and an engine connected to the outer motor rotor via the first gear transmission for driving the outer motor to generate electricity, the inner motor rotor connected to the differential via the second gear transmission for driving the vehicle to travel, the inner motor rotor rotationally connected to the outer motor rotor via a bearing, the inner motor rotor and the outer motor rotor being completely decoupled.

2. The range extended vehicle drive system with two-in-one electric machine of claim 1, wherein, the inner motor rotor rotationally connected to an outer rotor support via an output shaft of the inner motor and a bearing, the outer rotor support torsionally connected to the outer motor rotor.

3. The range extended vehicle drive system with two-in-one electric machine of claim 1, wherein, the stator core comprising a plurality of silicon steel sheets integrally punched, the plurality of silicon steel sheets being stacked to form a core body, an inner circumferential portion of the core body being provided with a plurality of inner stator conductor grooves, an outer circumferential portion of the core body being provided with a plurality of outer stator conductor grooves.

4. The range extended vehicle drive system with two-in-one electric machine of claim 1, wherein, the first gear transmission comprising a first gear pair composed of a first gear and a second gear externally meshing with each other, the first gear connected to the engine, the second gear connected to the outer motor rotor via an outer rotor support.

5. The range extended vehicle drive system having a two-in-one electric machine according to claim 4, characterized by, the first gear connected to an output shaft of the engine via a support shaft and a damper, the support shaft and the output shaft of the inner motor being arranged in parallel and staggered with each other.

6. The range extended vehicle drive system having a two-in-one electric machine according to claim 4, characterized by, the second gear transmission comprising a second gear pair, a third gear pair and an intermediate shaft, the second gear pair comprising a third gear and a fourth gear meshing with each other, the third gear coaxially torsionally connected to the inner motor rotor, the fourth gear torsionally connected to the intermediate shaft, the third gear pair comprising a fifth gear and a sixth gear meshing with each other, the fifth gear torsionally connected to the intermediate shaft, the sixth gear constituting an input gear of the differential.

7. The range extended vehicle drive system having a two-in-one electric machine according to claim 6, characterized by, the differential comprising two half shafts, the output shaft of the inner motor, the intermediate shaft and the half shafts being parallel to each other.

8. The range extended vehicle drive system having a two-in-one electric machine according to claim 6, characterized by, viewed along at least one radial direction of the two-in-one motor, the first gear pair and the third gear pair overlap with each other, the second gear pair and the differential overlap with each other.

9. The range extended vehicle drive system having a two-in-one electric machine according to claim 6, characterized by, the engine and the two-in-one motor are respectively located on both axial sides of the first gear pair and the second gear pair.

10. A vehicle characterized by comprising: a range extended vehicle drive system with a two-in-one motor according to any one of claims 1 to 9.

Images