Three-gear coaxial power transmission device and vehicle

Abstract

The utility model relates to a three-gear coaxial power transmission device and a vehicle, and the three-gear coaxial power transmission device comprises a first sub-transmission device which comprises a first component, a second component and a third component; the second sub-transmission device comprises a fourth component, a fifth component and a sixth component; the first switching device is provided with a first combining part, a second combining part and a first middle part, and the first switching device is arranged between the first sub-transmission device and the second sub-transmission device on the power transmission path; and the second switching device is provided with a third combination part, a fourth combination part and a second middle part, and the second switching device is arranged between the second sub-transmission device and the wheels on the power transmission path. According to the utility model, through the cooperative work of the two sets of switching mechanisms, the switching between the large speed ratio and the small speed ratio of the at least two planet rows is realized, and the climbing and heavy-load capabilities and the high-speed cruising capability of a vehicle are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of transmission, and in particular relates to a three-speed coaxial power transmission device and a vehicle comprising the device. Background Art

[0002] The power transmission devices currently used in electric drive axles are basically integral parallel axis, integral vertical axis and disconnected 3-parallel axis structures. Although these structures can realize the transmission of electric drive power, they have the characteristics of more parts, complex structure, large space size and high manufacturing cost, and do not have advantages in vehicle module layout and lightweight design. Utility Model Content

[0003] For this reason, the utility model proposes the following scheme.

[0004] A three-speed coaxial power transmission device is provided between a power source and a wheel, and is used to transmit power from the power source to the wheel. The three-speed coaxial power transmission device comprises:

[0005] A first sub-transmission device including a first member, a second member and a third member;

[0006] a second sub-transmission device including a fourth member, a fifth member and a sixth member;

[0007] A first switching device having a first coupling component, a second coupling component and a first intermediate component, wherein the first switching device is disposed between the first sub-transmission device and the second sub-transmission device on a power transmission path;

[0008] The second switching device has a third coupling component, a fourth coupling component and a second intermediate component, and the second switching device is arranged between the second sub-transmission device and the wheels on the power transmission path.

[0009] According to one aspect of the utility model, it also includes a third sub-transmission device, which includes a seventh component, an eighth component and a ninth component, the seventh component is connected to the power source, the eighth component is connected to the first component, the ninth component is fixed, the second component is fixed and connected to the fourth component, the third component is connected to the first intermediate component, the first combining component is connected to the fifth component, the second combining component is connected to the sixth component, the sixth component is connected to the third combining component, the fifth component is connected to the fourth combining component, the second intermediate component serves as an output component, and the second sub-transmission device has a single planetary gear stage or a double planetary gear stage.

[0010] According to one aspect of the utility model, it also includes a third sub-transmission device, which includes a seventh component, an eighth component and a ninth component, the first component is connected to the power source, the second component is fixed and connected to the fourth component, the third component is connected to the seventh component, the ninth component is fixed, the eighth component is connected to the first intermediate component, the first combining component is connected to the fifth component, the second combining component is connected to the sixth component, the sixth component is connected to the third combining component, the fifth component is connected to the fourth combining component, the second intermediate component serves as an output component, and the second sub-transmission device has a single planetary gear stage or a double planetary gear stage.

[0011] According to one aspect of the utility model, it also includes a third sub-transmission device, which includes a seventh component, an eighth component and a ninth component, the first component is connected to the power source, the second component is fixed and connected to the fourth component, the third component is connected to the seventh component, the eighth component is fixed, the ninth component is connected to the first intermediate component, the first combining component is connected to the fifth component, the second combining component is connected to the sixth component, the sixth component is connected to the third combining component, the fifth component is connected to the fourth combining component, and the second intermediate component serves as an output component.

[0012] According to one aspect of the utility model, it also includes a third sub-transmission device, which includes a seventh component, an eighth component and a ninth component, the seventh component is connected to the power source, the eighth component is fixed and connected to the fourth component, the ninth component is connected to the first component, the second component is fixed, the third component is connected to the first intermediate component, the first combining component is connected to the fifth component, the second combining component is connected to the sixth component, the sixth component is connected to the third combining component, the fifth component is connected to the fourth combining component, and the second intermediate component serves as an output component.

[0013] According to one aspect of the present invention, the first component is connected to the power source, the second component is fixed and connected to the fourth component, the third component is connected to, the second component is fixed, the third component is connected to the first intermediate component, the first combining component is connected to the fifth component, the second combining component is connected to the sixth component, the sixth component is connected to the third combining component, the fifth component is connected to the fourth combining component, and the second intermediate component serves as an output component.

[0014] According to one aspect of the present invention, both the first sub-transmission and the second sub-transmission have a double planetary gear stage.

[0015] The utility model also provides a vehicle, comprising a motor and the above-mentioned three-speed coaxial power transmission device.

[0016] According to one aspect of the utility model, a differential is further included, and the output member of the three-speed coaxial power transmission device is directly connected to the differential or connected to the differential through at least one reduction stage.

[0017] According to one aspect of the present invention, at least one of the axis of the motor and the axes of the first sub-transmission device and the second sub-transmission device is coaxial with the drive shaft of the vehicle.

[0018] It can be seen from the above scheme that the utility model realizes the conversion of large speed ratio and small speed ratio of at least two planetary gears through the cooperation of two sets of switching mechanisms, thereby improving the vehicle's climbing, heavy-load ability and high-speed endurance. The switching element is controlled according to the vehicle speed, the driver's power demand and the battery SOC requirements, so that the vehicle can travel in different gears, improve the economy and power of the drive motor, improve the efficiency and life of the motor, and increase the vehicle's cruising range. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Exemplary embodiments of the present invention are described with reference to the accompanying drawings, in which:

[0020] Figure 1 A schematic diagram of a first embodiment of a three-speed coaxial power transmission device of the utility model is shown.

[0021] Figure 2 A schematic diagram of a second embodiment of a three-speed coaxial power transmission device of the utility model is shown.

[0022] Figure 3 A schematic diagram of a third embodiment of a three-speed coaxial power transmission device of the utility model is shown.

[0023] Figure 4 A schematic diagram of a fourth embodiment of a three-speed coaxial power transmission device of the utility model is shown.

[0024] Figure 5 A schematic diagram of a fifth embodiment of a three-speed coaxial power transmission device of the present utility model is shown.

[0025] Figure 6 A schematic diagram of a sixth embodiment of a three-speed coaxial power transmission device of the present utility model is shown.

[0026] Figure 7 A schematic diagram of a seventh embodiment of a three-speed coaxial power transmission device of the present utility model is shown. DETAILED DESCRIPTION

[0027] Embodiments of the present invention are described below with reference to the accompanying drawings. In the following description, many specific details are set forth so that those skilled in the art can more fully understand and implement the present invention. However, it is obvious to those skilled in the art that the implementation of the present invention may not have some of these specific details. In addition, it should be understood that the present invention is not limited to the specific embodiments described. On the contrary, any combination of the features and elements described below may be considered to implement the present invention, regardless of whether they relate to different embodiments. Therefore, the following aspects, features, embodiments and advantages are for illustrative purposes only and should not be regarded as features or limitations of the claims unless clearly stated in the claims.

[0028] In the following description, the descriptions about directions, such as "upper", "lower", "inner", "outer", "radial", "axial", etc., which may be used, are only for the convenience of description, unless otherwise specified, and are not intended to form any limitation on the technical solution of the utility model. In addition, in the following description, terms such as "first", "second", etc. are used to describe the elements of the present application, and these terms are only used to distinguish the elements, and are not intended to limit the nature, sequence, order or number of these elements.

[0029] Figure 1 The schematic diagram of the first embodiment of the three-speed coaxial power transmission device of the utility model is shown. Figure 1 It can be seen that the vehicle includes a first driving wheel 1, a first driven shaft 2, a driving motor 3, a first sun gear 4, a first planetary carrier 5, a first ring gear 6, a second sun gear 7, a second planetary carrier 8, a second ring gear 9, a first combining tooth 10, a first gear sleeve 11, a second combining tooth 12, a third planetary carrier 13, a third sun gear 14, a third ring gear 15, a third combining tooth 16, a second gear sleeve 17, a fourth combining tooth 18, a first gear 19, a second gear 20, a differential assembly, a second driven shaft 22, and a second driving wheel 23.

[0030] Figure 1 The three-speed coaxial power transmission device of the utility model shown in the figure includes: a driving motor 3; three planetary rows: the first planetary row includes a first sun gear 4, a first planetary carrier 5 and a first ring gear 6, the second planetary row includes a second sun gear 7, a second planetary carrier 8 and a second ring gear 9, and the third planetary row includes a third sun gear 14, a third planetary carrier 13 and a third ring gear 15; two sets of switching mechanisms: the first switching mechanism includes a first gear sleeve 11, a first combining tooth 10 and a second combining tooth 12, and the second switching mechanism includes a second gear sleeve 17, a third combining tooth 16 and a fourth combining tooth 18.

[0031] The driving motor 3 is connected to the first sun gear 4 to realize the input of power; the first ring gear 6 is connected to a fixed component, such as a housing of the transmission device; the first planet carrier 5 is connected to the second sun gear 7 to realize the transmission of power from the first planetary gear to the second planetary gear.

[0032] The second planet carrier 8 is connected to the third sun gear 14 and is connected to a fixed component, such as a housing of the transmission.

[0033] The first gear sleeve 11 of the first switching mechanism is connected to the second gear ring 9, the first combining tooth 10 is connected to the third planetary carrier 13, and the second combining tooth 12 is connected to the third gear ring 15. The switching mechanism is combined with different combining teeth to realize the mutual conversion between the two gears and the neutral gear, so as to realize the transmission of power from the second planetary gear to the third planetary gear.

[0034] The second gear sleeve 17 of the second switching mechanism is connected to the first gear 19, the third combining tooth 16 is connected to the third gear ring 15, and the fourth combining tooth 18 is connected to the third planet carrier 13. The switching mechanism is combined with different combining teeth to realize the mutual conversion between the two gears and the neutral gear, so that the power is transmitted from the third planetary gear to the differential assembly.

[0035] The vehicle includes a differential assembly connected to a three-speed coaxial power transmission device. The differential assembly includes a differential gear transmission device 21 and a pair of gear pairs: a first gear 19 and a second gear 20.

[0036] The first gear 19 is meshed with the second gear 20, and the second gear 20 is fixedly connected to the housing of the differential gear transmission device 21. The two output shafts of the differential gear transmission device 21 are respectively connected to the first driven shaft 2 and the second driven shaft 22. The first driven shaft 2 is connected to the first driving wheel 1, and the second driven shaft 22 is connected to the second driving wheel 23, so that power is transmitted from the differential assembly to the driving wheel.

[0037] Although the switching mechanism is described above by taking the combined teeth and the combined gear sleeve as examples, the switching mechanism can also be in the form of a synchronizer, a dog clutch or an electromagnetic clutch.

[0038] Preferably, at least two of the drive motor, the first planetary gear, the second planetary gear, the third planetary gear, and the differential assembly are coaxially arranged. Here, coaxial arrangement means that the rotation axis of the rotor of the drive motor, the rotation axis of each component of the planetary gear, and the axis of the output shaft of the differential assembly are coaxial.

[0039] Preferably, Figure 1 The positional relationship of the components in the diagram is the actual positional relationship of the components. That is, the drive motor, the first planetary gear, the second planetary gear, the second planetary gear, the first switching mechanism, the third planetary gear, and the second switching mechanism are arranged in sequence in the axial direction.

[0040] exist Figure 1 In the embodiment, the first planetary row is in the form of a single planetary row, and the second planetary row and the third planetary row are in the form of a double planetary gear planetary row or a double-stage planetary row.

[0041] The following is based on Figure 1 The specific structure shown illustrates how it works.

[0042] N gear: the first gear sleeve 11 of the first switching mechanism is located between the first combining tooth 10 and the second combining tooth 12 , and the second gear sleeve 17 of the second switching mechanism is located between the third combining tooth 16 and the fourth combining tooth 18 .

[0043] First gear: The first gear sleeve 11 of the first switching mechanism is combined with the first combining tooth 10, and the second gear sleeve 17 of the second switching mechanism is combined with the third combining tooth 16. Power transmission path: drive motor 3 → first sun gear 4 → first planetary carrier 5 → second sun gear 7 → second ring gear 9 → first gear sleeve 11 → first combining tooth 10 → third ring gear 15 → third combining tooth 16 → second gear sleeve 17 → first gear 19 → second gear 20 → differential gear transmission device 21 → first driven shaft 2 / second driven shaft 22 → first drive wheel 1 / second drive wheel 23.

[0044] Second gear: The first gear sleeve 11 of the first switching mechanism is combined with the second combined tooth 12, and the second gear sleeve 17 of the second switching mechanism is combined with the third combined tooth 16. Power transmission path: drive motor 3 → first sun gear 4 → first planetary carrier 5 → second sun gear 7 → second ring gear 9 → first gear sleeve 11 → second combined tooth 12 → third ring gear 15 → third combined tooth 16 → second gear sleeve 17 → first gear 19 → second gear 20 → differential gear transmission device 21 → first driven shaft 2 / second driven shaft 22 → first drive wheel 1 / second drive wheel 23.

[0045] Third gear: The first gear sleeve 11 of the first switching mechanism is combined with the second combining tooth 12, and the second gear sleeve 17 of the second switching mechanism is combined with the fourth combining tooth 18. Power transmission path: drive motor 3 → first sun gear 4 → first planetary carrier 5 → second sun gear 7 → second ring gear 9 → first gear sleeve 11 → second combining tooth 12 → third ring gear 15 → third planetary carrier 13 → fourth combining tooth 18 → second gear sleeve 17 → first gear 19 → second gear 20 → differential gear transmission device 21 → first driven shaft 2 / second driven shaft 22 → first drive wheel 1 / second drive wheel 23.

[0046] The above describes the structure and working process of the vehicle and the three-speed coaxial power transmission device of the first embodiment of the utility model. The following describes other embodiments of the utility model. For the sake of simplicity, only the differences from the first embodiment are described below.

[0047] Figure 2 FIG. 2 shows a schematic diagram of a second embodiment of a three-speed coaxial power transmission device of the present utility model. Figure 2 In essence, it can be understood that the positions of the first planetary gear and the second planetary gear are interchanged, while the input and output components remain unchanged. Figure 2 In the embodiment, the first planetary gear adopts a double planetary gear train structure, the first planet carrier 5 is fixed, the first sun gear 4 is an input component, and the first ring gear 6 is an output component, wherein the first sun gear 4 is connected to the motor rotor, and the first ring gear 6 is connected to the second sun gear 7 of the second planetary gear, and the first planetary gear 5 is connected to the sun gear 14 of the third planetary gear. In other structural aspects, the first embodiment and the second embodiment are basically the same.

[0048] Figure 3 FIG. 2 shows a schematic diagram of a third embodiment of a three-speed coaxial power transmission device of the present utility model. Figure 3 In the embodiment, all three planetary rows adopt double-stage planetary rows, and the planet carriers of the first planetary row and the second planetary row are fixed, the sun gear of the first planetary row serves as an input component, the ring gear of the first planetary row is connected to the sun gear of the second planetary row, and the planet carrier of the first planetary row is connected to the sun gear of the third planetary row.

[0049] Figure 4 FIG. 4 is a schematic diagram showing a fourth embodiment of a three-speed coaxial power transmission device of the present utility model. Figure 4 The first and third planetary gears are in the form of single-stage planetary gears, while the others are Figure 1 The structures shown are essentially the same.

[0050] Figure 5 FIG. 5 is a schematic diagram of a fifth embodiment of a three-speed coaxial power transmission device of the present utility model. Figure 5 The first planetary gear adopts the form of double-stage planetary gear, the second and third planetary gear adopts the form of single-stage planetary gear, and the others are the same as Figure 2 The structures shown are essentially the same.

[0051] Figure 6 FIG. 6 is a schematic diagram of a sixth embodiment of a three-speed coaxial power transmission device of the present utility model. Figure 6 Among them, the first planetary row and the second planetary row are in the form of double-stage planetary rows, and the third planetary row is in the form of single-stage planetary row.

[0052] Figure 7 FIG. 2 shows a schematic diagram of a seventh embodiment of a three-speed coaxial power transmission device of the present utility model. Figure 7 In the embodiment, only two planetary rows are provided, and preferably both of the two planetary rows are in the form of double-stage planetary gear rows.

[0053] The utility model realizes the conversion of large speed ratio and small speed ratio of at least two planetary gears through the cooperation of two sets of switching mechanisms, thereby improving the vehicle's climbing, heavy-load and high-speed endurance capabilities. The switching element is controlled according to the vehicle speed, the driver's power demand and the battery SOC requirements, so that the vehicle can travel in different gears, improve the economy and power of the drive motor, improve the efficiency and life of the motor, and increase the vehicle's endurance mileage.

[0054] Various feasible embodiments of the present invention have been described above. Those skilled in the art will appreciate that certain features of the variants shown in the figures can be combined with each other without conflict, and these combinations are all included in the solutions of the present invention.

[0055] The above description is merely an exemplary embodiment of the spirit and principle of the present invention. It will be appreciated by those skilled in the art that various changes may be made to the described examples without departing from the spirit and principle, and these changes and their various equivalents are anticipated by the applicant and fall within the scope defined by the claims of the present invention.

Claims

1. A three-speed coaxial power transmission device, arranged between a power source and a wheel, for transmitting the power of the power source to the wheel, characterized in that: The three-speed coaxial power transmission device comprises: A first sub-transmission device including a first member, a second member and a third member; a second sub-transmission device including a fourth member, a fifth member and a sixth member; A first switching device having a first coupling component, a second coupling component and a first intermediate component, wherein the first switching device is disposed between the first sub-transmission device and the second sub-transmission device on a power transmission path; The second switching device has a third coupling component, a fourth coupling component and a second intermediate component, and the second switching device is arranged between the second sub-transmission device and the wheels on the power transmission path.

2. The three-speed coaxial power transmission device according to claim 1, characterized in that: It also includes a third sub-transmission device, which includes a seventh member, an eighth member and a ninth member, the seventh member is connected to the power source, the eighth member is connected to the first member, the ninth member is fixed, the second member is fixed and connected to the fourth member, the third member is connected to the first intermediate component, the first combining component is connected to the fifth member, the second combining component is connected to the sixth member, the sixth member is connected to the third combining component, the fifth member is further connected to the fourth combining component, the second intermediate component serves as an output component, and the second sub-transmission device has a single planetary gear stage or a double planetary gear stage.

3. The three-speed coaxial power transmission device according to claim 1, characterized in that: It also includes a third sub-transmission device, which includes a seventh component, an eighth component and a ninth component, the first component is connected to the power source, the second component is fixed and connected to the fourth component, the third component is connected to the seventh component, the ninth component is fixed, the eighth component is connected to the first intermediate component, the first combining component is connected to the fifth component, the second combining component is connected to the sixth component, the sixth component is further connected to the third combining component, the fifth component is further connected to the fourth combining component, the second intermediate component serves as an output component, and the second sub-transmission device has a single planetary gear stage or a double planetary gear stage.

4. The three-speed coaxial power transmission device according to claim 1, characterized in that: It also includes a third sub-transmission device, which includes a seventh component, an eighth component and a ninth component, the first component is connected to the power source, the second component is fixed and connected to the fourth component, the third component is connected to the seventh component, the eighth component is fixed, the ninth component is connected to the first intermediate component, the first combined component is connected to the fifth component, the second combined component is connected to the sixth component, the sixth component is further connected to the third combined component, the fifth component is further connected to the fourth combined component, and the second intermediate component serves as an output component.

5. The three-speed coaxial power transmission device according to claim 1, characterized in that: It also includes a third sub-transmission device, which includes a seventh component, an eighth component and a ninth component, the seventh component is connected to the power source, the eighth component is fixed and connected to the fourth component, the ninth component is connected to the first component, the second component is fixed, the third component is connected to the first intermediate component, the first combined component is connected to the fifth component, the second combined component is connected to the sixth component, the sixth component is further connected to the third combined component, the fifth component is further connected to the fourth combined component, and the second intermediate component serves as an output component.

6. The three-speed coaxial power transmission device according to claim 1, characterized in that: The first member is connected to the power source, the second member is fixed and connected to the fourth member, the third member is connected to, the second member is fixed, the third member is connected to the first intermediate component, the first combining component is connected to the fifth member, the second combining component is connected to the sixth member, the sixth member is connected to the third combining component, the fifth member is connected to the fourth combining component, and the second intermediate component serves as an output component.

7. The three-speed coaxial power transmission device according to claim 6, characterized in that: The first and second sub-transmissions both have a double planetary gear stage.

8. A vehicle, characterized in that: The invention comprises a motor and a three-speed coaxial power transmission device according to any one of claims 1 to 7.

9. The vehicle according to claim 8, characterized in that A differential is also included, and an output member of the three-speed coaxial power transmission device is directly connected to the differential or connected to the differential through at least one reduction stage.

10. The vehicle according to claim 8 or 9, characterized in that An axis of the electric machine and at least one of the axes of the first and second sub-transmissions are coaxial with a drive shaft of the vehicle.

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