Hybrid transmissions, drivetrains, and vehicles

Abstract

This application relates to a hybrid transmission, drive system, and vehicle, and is applied in the field of vehicle drive systems. It includes a housing, a first planetary gear set, a second planetary gear set, and a torsional damper. The housing is connected to a vehicle frame via a mounting bracket. The first planetary gear set is encapsulated within the housing and is used for drive-connection to a first power source. The second planetary gear set is encapsulated within the housing and correspondingly arranged to the first planetary gear set, and is used for drive-connection to a second power source. The torsional damper is drive-connected between the first and second planetary gear sets. This application, through the inclusion of the torsional damper, can significantly reduce the impact of vibrations generated during the operation of the first power source on the operation of the second power source.

Description

Technical Field

[0001] This application relates to the technical field of vehicle transmission systems, and in particular to a hybrid transmission, transmission system, and vehicle. Background Technology

[0002] With the development of new energy vehicles, hybrid transmissions are now widely used in the commercial vehicle sector, especially in the heavy-duty commercial vehicle sector. The multi-working modes, high efficiency, and low weight of the power-split hybrid transmission have made it a major trend in hybrid vehicles.

[0003] However, power-split hybrid transmissions require an engine assembly and two electric motor assemblies for power coupling, resulting in a bulky structure that is difficult to arrange. Therefore, an integrated powertrain system is needed. Consequently, powertrain systems that integrate the transmission system and electric motors have emerged on the market. However, these integrated powertrains are significantly affected by engine vibration and urgently require optimization. Summary of the Invention

[0004] Therefore, it is necessary to provide a hybrid transmission and vehicle to address the issue that the integrated powertrain is significantly affected by engine vibration.

[0005] Firstly, this application provides a hybrid transmission, which adopts the following technical solution:

[0006] A hybrid transmission includes a housing, a first planetary gear set, a second planetary gear set, and a torsional damper. The housing is connected to a vehicle frame via a suspension. The first planetary gear set is encapsulated within the housing and is used for driving a first power source. The second planetary gear set is encapsulated within the housing and is correspondingly arranged to the first planetary gear set, and is used for driving a second power source. The torsional damper is driven between the first planetary gear set and the second planetary gear set.

[0007] In one embodiment, the hybrid transmission further includes a third input assembly and a power coupling gear encapsulated within the housing, the third input assembly being used for drive connection to a third power source, and the power coupling gear being drive connection between the third input assembly and the first planetary gear assembly.

[0008] In one embodiment, the first planetary gear assembly includes a first planet carrier and a first sun gear, a first ring gear, and a plurality of first planetary gears disposed on the first planet carrier. All the first planetary gears are distributed circumferentially along the sun gear, and all the first planetary gears mesh between the first sun gear and the first ring gear.

[0009] In one embodiment, the second planetary gear assembly includes a second planetary carrier and a second sun gear, a second ring gear, and a plurality of second planetary gears disposed on the second planetary carrier. All the second planetary gears are distributed circumferentially along the sun gear, and all the second planetary gears mesh between the second sun gear and the second ring gear. The second ring gear is fixed to the housing.

[0010] In one embodiment, the hybrid transmission further includes a shift mechanism assembly encapsulated within the housing, the shift mechanism assembly including a first gear position assembly, a second gear position assembly, and a shift sleeve, the first gear position assembly and the second gear position assembly being tractively connected to the power coupling gear; the shift sleeve being capable of engaging with the first gear position assembly or the second gear position assembly.

[0011] In one embodiment, the first gear assembly includes a first-gear drive gear and a first-gear driven gear, which are capable of meshing with the shift sleeve; the second gear assembly includes a second-gear drive gear and a second-gear driven gear, which are capable of meshing with the shift sleeve; the first-gear drive gear and the second-gear drive gear are coaxially fixed to the power coupling gear.

[0012] Secondly, this application provides a transmission system, which adopts the following technical solution:

[0013] A transmission system includes the aforementioned hybrid transmission and a power supply module, wherein the power source includes a first power source and a second power source arranged at intervals, and the hybrid transmission is drive-connected between the first power source and the second power source.

[0014] In one embodiment, the first power source is an engine, and the output end of the first power source is driven to the first planetary gear assembly; the second power source is an electric motor, and the output end of the second power source is driven to the second planetary gear assembly.

[0015] In one embodiment, the power source further includes a third power source, the output end of which is connected to the gear shifting mechanism assembly, and the third power source is an electric motor.

[0016] Secondly, this application provides a vehicle that adopts the following technical solution:

[0017] A vehicle comprising the aforementioned hybrid transmission or the aforementioned drivetrain.

[0018] In the aforementioned hybrid transmission, the output end of the first power source is driven to the input end of the first planetary gear assembly, and the output end of the second power source is driven to the input end of the second planetary gear assembly. The first planetary gear assembly and the second planetary gear assembly are connected by a torsional damper. By setting the torsional damper, the impact of the vibration of the first power source on the operation of the second power source can be greatly reduced. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of a transmission system in one embodiment of this application.

[0020] Figure 2 This is a schematic diagram of the first planetary assembly in one embodiment of this application.

[0021] Figure 3 This is a schematic diagram of the second planetary assembly in one embodiment of this application.

[0022] Figure 4 This is a schematic diagram of a gear shifting mechanism assembly in one embodiment of this application.

[0023] Attached image annotations:

[0024] 1. Housing; 11. First receiving cavity; 12. Second receiving cavity; 2. First planetary gear set assembly; 21. First planetary carrier; 22. First sun gear; 23. First ring gear; 24. First planetary gear; 3. Second planetary gear set assembly; 31. Second planetary carrier; 32. Second sun gear; 33. Second ring gear; 34. Second planetary gear; 4. Third input assembly; 5. Power coupling gear; 6. Shift mechanism assembly; 61. First gear position assembly; 611. First gear drive gear; 612. First gear driven gear; 62. Second gear position assembly; 621. Second gear drive gear; 622. Second gear driven gear; 63. Shift sleeve; 7. Power supply module; 71. First power source; 72. Second power source; 73. Third power source; 8. Mount; 9. Torsional damper. Detailed Implementation

[0025] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0026] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0027] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0028] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0029] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0030] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0031] With the development of new energy vehicles, hybrid transmissions, such as power-split hybrid transmissions, are now widely used in the commercial vehicle sector, especially in heavy-duty commercial vehicles. These transmissions offer multiple operating modes, high efficiency, and low weight, making them a major trend in hybrid vehicles today.

[0032] However, power-split hybrid transmissions require an engine assembly and two electric motor assemblies for power coupling, resulting in a bulky structure that is difficult to arrange. An integrated powertrain system is needed. Currently, powertrain systems that integrate the transmission system and electric motors are emerging on the market, but the integrated powertrain is greatly affected by engine vibration and urgently needs optimization.

[0033] Therefore, this application takes into account the impact of engine vibration on the motor on the basis of such integrated powertrain, and there is currently no such power split two-speed hybrid transmission structure that integrates the motor and the transmission system on the market.

[0034] The following is combined with Figure 1-4 The embodiments of this application will be described in further detail.

[0035] See Figure 1 , Figure 1 The diagram shows a transmission system in one embodiment of the present application. One embodiment of the present application provides a hybrid transmission, including a housing 1 and a first planetary gear assembly 2, a second planetary gear assembly 3 and a torsional damper 9 encapsulated in the housing 1. The first planetary gear assembly 2 and the second planetary gear assembly 3 are symmetrically distributed with respect to the torsional damper 9.

[0036] Specifically, the input end of the first planetary gear assembly 2 is driven to the output end of the first power source 71, the input end of the second planetary gear assembly 3 is driven to the output end of the second power source 72, and the torsional damper 9 is driven between the first planetary gear assembly 2 and the second planetary gear assembly 3. The first power source 71 can specifically be an engine, and the second power source 72 can specifically be an electric motor.

[0037] It is understandable that when the first power source 71 is an engine, vibration will inevitably be generated during the operation of the first power source 71, and the vibration will be transmitted to the second power source 72 through the transmission system, thereby affecting the normal operation of the second power source 72 and even affecting the performance of the vehicle's transmission system.

[0038] In this embodiment, the torsional vibration of the transmission system is effectively reduced by the action of the elastic element and the damping element in the torsional damper 9, which greatly reduces the impact of the vibration of the first power source 71 on the operation of the second power source 72, thereby improving the driving comfort of the car and the reliability of the powertrain.

[0039] Continue reading Figure 1 As shown in this embodiment, the power source connected to the hybrid transmission includes two sources. One source consists of the first power source 71 and the second power source 72 described above, while the other source consists of a third power source 73. These two power sources are coupled to ensure the normal operation of the vehicle's transmission system. Specifically, the third power source 73 can be an electric motor.

[0040] In some embodiments, the hybrid transmission further includes a third input assembly 4 and a power coupling gear 5 encapsulated in the housing 1. The third input assembly 4 is used to drive a third power source 73, and the power coupling gear 5 is driven between the third input assembly 4 and the first planetary gear assembly 2 to achieve power coupling between the first power source 71, the second power source 72 and the third power source 73, so that the various power sources in the hybrid transmission are highly integrated together.

[0041] Combination Figure 1 and Figure 2 As shown, Figure 2 A schematic diagram of a first planetary gear assembly 2 according to an embodiment of this application is shown. In some embodiments, the first planetary gear assembly 2 includes a first planet carrier 21 and a first sun gear 22, a first ring gear 23 and a plurality of first planetary gears 24 mounted on the first planet carrier 21.

[0042] The first sun gear 22 is connected to the output end of the first power source 71. All the first planetary gears 24 are distributed at intervals along the circumference of the sun gear, preferably evenly distributed along the circumference of the sun gear. All the first planetary gears 24 are meshed between the first sun gear 22 and the first ring gear 23. The first ring gear 23 is meshed with the aforementioned power coupling gear 5 to complete the operation of taking power from the first power source 71.

[0043] Combination Figure 3 As shown, Figure 3A schematic diagram of a second planetary gear assembly according to one embodiment of this application is shown. In some embodiments, the second planetary gear assembly 3 includes a second planet carrier 31 and a second sun gear 32, a second ring gear 33, and a plurality of second planetary gears 34 mounted on a first planet carrier 21.

[0044] The second sun gear 32 is connected to the output end of the second power source 72. All the second planetary gears 34 are distributed at intervals along the circumference of the sun gear, preferably evenly distributed along the circumference of the sun gear. All the second planetary gears 34 are meshed between the second sun gear 32 and the second gear ring 33. The second gear ring 33 is fixed to the housing 1.

[0045] During the operation of the vehicle's transmission system, the first power source 71 and the second power source 72 serve as the first part of the power source. The first power source 71 is driven to the first planetary carrier 21. The second power source 72 is driven to the first sun gear 22 of the first planetary carrier 2 after being reduced in speed by the second planetary gear assembly 3 and then driven to the first sun gear 22 of the first planetary gear assembly 2 via the torsional damper 9. Then, the first power source 71 and the second power source 72 are coupled through meshing with the first planetary gear 24, and the power is output to the power coupling gear 5 through the first ring gear 23 of the first planetary gear assembly 2.

[0046] The second sun gear 32 is connected to the second power source 72 to enable the power take-off operation of the second power source 72. The second gear ring 33 is fixedly connected to the inner wall of the housing 1 and does not rotate. The power output by the second power source 72 is transmitted to the second planetary carrier 31 through the second planetary gear 34 to achieve deceleration.

[0047] Specifically, the third power source 73 serves as another power source. The output end of the third power source 73 is driven to the input end of the third input assembly 4, and the third power source 73 is powered by the meshing of the third input assembly 4 with the power coupling gear 5. In this embodiment, the third input assembly 4 may specifically be a gear driven to the output shaft of the third power source 73.

[0048] It is understood that, in the embodiments of this application, since the third power source 73 and the first power source 71 are connected by a gear structure, the tooth profile and backlash design of the gear itself can limit the lateral movement of the gear and ensure that the gear operates on a predetermined trajectory.

[0049] Therefore, in this embodiment of the application, the torque and vibration transmission between the first power source 71 and the third power source 73, which are connected by a gear structure, is relatively small. Thus, in this embodiment of the application, the power coupling gear 5 is directly meshed with the first gear ring 23 of the first planetary gear assembly 2 to achieve power coupling between the first power source 71 and the third power source 73.

[0050] See Figure 1 and Figure 4 As shown, Figure 4 A schematic diagram of a shift mechanism assembly according to one embodiment of this application is shown. In some embodiments, the hybrid transmission further includes a shift mechanism assembly 6 encapsulated within a housing 1, the shift mechanism assembly 6 including a first gear position component 61, a second gear position component 62, and a shift sleeve 63.

[0051] The first gear assembly 61 and the second gear assembly 62 are spaced apart and are both connected to the power coupling gear 5 to draw power from the power supply module 7. The shift sleeve 63 is movably disposed between the first gear assembly 61 and the second gear assembly 62 and can engage with either the first gear assembly 61 or the second gear assembly 62 according to the current gear requirement, so that the transmission system can quickly switch to the corresponding gear.

[0052] For details, please refer to [link / reference]. Figure 4 As shown, the first gear assembly 61 includes a first gear drive gear 611 and a first gear driven gear 612, which can be meshed and driven by the aforementioned shift sleeve 63; the second gear assembly 62 includes a second gear drive gear 621 and a second gear driven gear 622, which can also be meshed and driven by the aforementioned shift sleeve 63.

[0053] Among them, the first gear drive gear 611 and the second gear drive gear 621 are coaxially fixed to the aforementioned power coupling gear 5 to realize power take-off operation.

[0054] Combination Figure 1 As shown in the embodiment of this application, during actual operation of the transmission system, the two power components are coupled and then perform gear shifting operations through the gear shifting mechanism assembly 6. When the shift sleeve 63 meshes with the first gear driven gear 612, the power is transmitted from the power coupling gear 5 to the first gear driving gear 611, and then to the first gear driven gear 612 for power output. At this time, the second gear driven gear 622 idles. When the shift sleeve 63 meshes with the second gear driven gear 622, the power is transmitted from the power coupling gear 5 to the second gear driving gear 621, and then to the second gear driven gear 622 for power output. At this time, the first gear driven gear 612 idles. In some other embodiments, the gear shifting mechanism can also be replaced with a synchronizer or similar gear shifting mechanism.

[0055] Continue reading Figure 1 As shown, in some embodiments, the housing 1 includes a first receiving cavity 11 and a second receiving cavity 12 that are spaced apart and at least partially connected, wherein the stators of the second power source 72 and the third power source 73 are both encapsulated in the second receiving cavity 12 to form a sub-assembly of the motor and the housing 1.

[0056] In this design, the housing 1 can be connected to the frame separately via the suspension 8. In this structure, the motor is arranged away from the engine and the torsional damper 9 between the first planetary gear assembly 2 and the second planetary gear assembly 3, which can significantly reduce the impact of the vibration generated by the first power source 71 during operation on the operation of the second power source 72.

[0057] In addition, in this embodiment, the first planetary gear assembly 2, the second planetary gear assembly 3, the third input assembly 4, the power coupling gear 5, and the shift mechanism assembly 6 are all encapsulated in the first receiving cavity 11 to form a transmission system sub-assembly, so as to integrate the motor and housing 1 sub-assembly with the transmission system sub-assembly.

[0058] Combination Figures 1 to 4 As shown, in some embodiments, this application also provides a transmission system, specifically a vehicle transmission system, which includes a hybrid transmission as shown in any of the above embodiments and a power supply module 7. Specifically, the power supply module 7 includes a first power source 71, a second power source 72, and a third power source 73. The first power source 71 is drive-connected to the input end of the first planetary gear assembly 2, the second power source 72 is drive-connected to the input end of the second planetary gear assembly 3, and the third power source 73 is drive-connected to the input end of the third input assembly 4.

[0059] Among them, the first power source 71 and the second power source 72 together constitute one power source of this system, and the third power source 73 is another power source of this system. This application achieves power take-off by coupling the two power sources.

[0060] In other embodiments, this application also provides a vehicle (not shown), which may be a commercial heavy-duty hybrid new energy vehicle, the vehicle including the hybrid transmission as shown in any of the above embodiments, or the transmission system as shown in any of the above embodiments.

[0061] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0062] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A hybrid transmission, characterized in that, The hybrid transmission includes: The housing can be connected to the frame via a suspension; The first planetary gear assembly is encapsulated within the housing and is used for transmission connection to the first power source; The second planetary gear assembly is encapsulated within the housing and is correspondingly arranged to the first planetary gear assembly, and is used for transmission connection to the second power source; A torsional damper is driven between the first planetary gear assembly and the second planetary gear assembly; The third input assembly is encapsulated within the housing and is used for transmission connection to the third power source; A power coupling gear, encapsulated within the housing, is drive-connected between the third input assembly and the first planetary gear assembly; and The gear shifting mechanism assembly, encapsulated within the housing, includes a first gear position assembly, a second gear position assembly, and a shift sleeve. Both the first gear position assembly and the second gear position assembly are driveably connected to the power coupling gear. The shift sleeve can mesh with either the first gear position assembly or the second gear position assembly. The first planetary gear set assembly includes a first planetary carrier and a first sun gear, a first ring gear, and a plurality of first planetary gears disposed on the first planetary carrier. All the first planetary gears are distributed circumferentially around the first sun gear, and all the first planetary gears mesh between the first sun gear and the first ring gear. The second planetary gear set assembly includes a second planetary carrier and a second sun gear, a second ring gear, and a plurality of second planetary gears disposed on the second planetary carrier. All the second planetary gears are distributed circumferentially around the second sun gear, and all the second planetary gears mesh between the second sun gear and the second ring gear. The second ring gear is fixed to the housing. The first gear assembly includes a first-gear drive gear and a first-gear driven gear, which can mesh with the shift sleeve; the second gear assembly includes a second-gear drive gear and a second-gear driven gear, which can mesh with the shift sleeve; the first-gear drive gear and the second-gear drive gear are coaxially fixed to the power coupling gear.

2. A transmission system, characterized in that, The transmission system includes: The hybrid transmission as described in claim 1; and The power supply module includes a first power source and a second power source arranged at intervals, and the hybrid transmission is connected between the first power source and the second power source.

3. The transmission system according to claim 2, characterized in that, The first power source is an engine, and the output end of the first power source is driven to the first planetary gear assembly; the second power source is an electric motor, and the output end of the second power source is driven to the second planetary gear assembly.

4. The transmission system according to claim 2, characterized in that, The power source also includes a third power source, the output end of which is connected to the gear shifting mechanism assembly, and the third power source is an electric motor.

5. A vehicle, characterized in that, This includes the hybrid transmission as described in claim 1, or the drivetrain as described in any one of claims 2-4.

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