Hybrid transmission, transmission system and vehicle

Abstract

The invention relates to a hybrid transmission, a transmission system and a vehicle, and is applied to the field of vehicle transmission systems. The device comprises a shell, a first planet row assembly, a second planet row assembly and a torsion damper, the shell can be connected with a frame through suspension, and the first planet row assembly is packaged in the shell and used for being in transmission connection with a first power source; the second planet row assembly is packaged in the shell, is arranged corresponding to the first planet row assembly and is used for being in transmission connection with a second power source; the torsion damper is connected between the first planet row assembly and the second planet row assembly in a transmission mode. Through the arrangement of the torsion damper, the influence of vibration generated in the operation of the first power source on the operation of the second power source can be greatly reduced.

Description

Technical Field

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

[0002] With the development of new energy vehicles, hybrid transmissions are now widely used in the field of commercial vehicles, especially in the field of heavy-duty commercial vehicles. With the advantages of multiple working modes, high efficiency and low weight of power-split hybrid transmissions, it has become a major trend in current hybrid vehicles.

[0003] However, the power-split hybrid transmission requires an engine assembly and two motor assemblies for power coupling, which is bulky and difficult to arrange, requiring an integrated powertrain system. Therefore, a powertrain system integrating the transmission system and the motor has emerged on the market, but the integrated powertrain is greatly affected by engine vibration and urgently needs to be optimized. Summary of the invention

[0004] Based on this, it is necessary to provide a hybrid transmission and vehicle to address the problem that the integrated powertrain is greatly affected by engine vibration.

[0005] In a first aspect, the present application provides a hybrid transmission, which adopts the following technical solution:

[0006] A hybrid transmission includes a housing, a first planetary gear assembly, a second planetary gear assembly and a torsional vibration damper. The housing can be connected to a vehicle frame through suspension. The first planetary gear assembly is encapsulated in the housing and is used for transmission connection to a first power source. The second planetary gear assembly is encapsulated in the housing and is arranged corresponding to the first planetary gear assembly and is used for transmission connection to a second power source. The torsional vibration damper is transmission-connected between the first planetary gear assembly and the second planetary gear assembly.

[0007] In one embodiment, the hybrid transmission further includes a third input assembly and a power coupling gear encapsulated in the housing, the third input assembly is used for transmission connection to a third power source, and the power coupling gear is transmission connected 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 arranged on the first planet carrier, all of the first planetary gears are distributed along the circumference of the sun gear, and all of the first planetary gears are meshed 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 arranged on the second planetary carrier, all of the second planetary gears are distributed along the circumference of the sun gear, all of the second planetary gears are meshed between the second sun gear and the second ring gear, and the second ring gear is fixed to the housing.

[0010] In one embodiment, the hybrid transmission also includes a shift mechanism assembly encapsulated in the housing, the shift mechanism assembly includes a first gear assembly, a second gear assembly and a shift sleeve, the first gear assembly and the second gear assembly are both transmission-connected to the power coupling gear; the shift sleeve can engage with the first gear assembly or the second gear assembly.

[0011] In one of the embodiments, the first gear assembly includes a first gear driving gear and a first gear driven gear, and the first gear driving gear and the first gear driven gear can be meshed with the shift gear sleeve; the second gear assembly includes a second gear driving gear and a second gear driven gear, and the second gear driving gear and the second gear driven gear can be meshed with the shift gear sleeve; the first gear driving gear and the second gear driving gear are coaxially fixed to the power coupling gear.

[0012] In a second aspect, the present application provides a transmission system, which adopts the following technical solution:

[0013] A transmission system includes the above-mentioned hybrid transmission and an energy supply module, wherein the power source includes a first power source and a second power source which are arranged at an interval, and the hybrid transmission is transmission-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 transmission-connected to the first planetary gear assembly; the second power source is an electric motor, and the output end of the second power source is transmission-connected to the second planetary gear assembly.

[0015] In one embodiment, the power source further includes a third power source, the output end of the third power source is transmission-connected to the shift mechanism assembly, and the third power source is a motor.

[0016] In a second aspect, the present application provides a vehicle, which adopts the following technical solution:

[0017] A vehicle comprises the hybrid transmission or the transmission system mentioned above.

[0018] In the above-mentioned hybrid transmission, the output end of the first power source is transmission-connected to the input end of the first planetary gear assembly, and the output end of the second power source is transmission-connected to the input end of the second planetary gear assembly. The first planetary gear assembly and the second planetary gear assembly are transmission-connected by means of a torsional vibration damper. By setting the torsional vibration damper, the influence of the vibration of the first power source on the operation of the second power source can be greatly reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] FIG. 1 is a schematic diagram of a transmission system in an embodiment of the present application.

[0020] FIG. 2 is a schematic diagram of a first planetary gear assembly in an embodiment of the present application.

[0021] FIG. 3 is a schematic diagram of a second planetary gear assembly in an embodiment of the present application.

[0022] FIG. 4 is a schematic diagram of a shift mechanism assembly in an embodiment of the present application.

[0023] Notes on the attached drawings:

[0024] 1. Housing; 11. First accommodating chamber; 12. Second accommodating chamber; 2. First planetary gear assembly; 21. First planet carrier; 22. First sun gear; 23. First ring gear; 24. First planetary gear; 3. Second planetary gear assembly; 31. Second planet 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 assembly; 611. First gear driving gear; 612. First gear driven gear; 62. Second gear assembly; 621. Second gear driving gear; 622. Second gear driven gear; 63. Shift gear sleeve; 7. Energy supply module; 71. First power source; 72. Second power source; 73. Third power source; 8. Suspension; 9. Torsional vibration damper. DETAILED DESCRIPTION

[0025] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0026] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0027] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0028] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated 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 connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0029] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0030] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, 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 implementation method.

[0031] With the development of new energy vehicles, hybrid transmissions, such as power-split hybrid transmissions, are now widely used in commercial vehicles, especially heavy-duty commercial vehicles. With its multiple working modes, high efficiency and low weight, it has become a major trend in current hybrid vehicles.

[0032] However, the power-split hybrid transmission requires an engine assembly and two motor assemblies for power coupling, so its structure is bulky and difficult to arrange, requiring an integrated powertrain system. Currently, powertrain systems that integrate transmission systems and motors are emerging on the market, but the integrated powertrain is greatly affected by engine vibration and urgently needs to be optimized.

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

[0034] The embodiments of the present application are further described in detail below in conjunction with Figures 1-4.

[0035] Refer to Figure 1, which shows a schematic diagram of a transmission system in an embodiment of the present application. An 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 vibration damper 9 encapsulated in the housing 1, and the first planetary gear assembly 2 and the second planetary gear assembly 3 are symmetrically distributed relative to the torsional vibration damper 9.

[0036] Specifically, the input end of the first planetary gear assembly 2 is transmission-connected to the output end of the first power source 71, the input end of the second planetary gear assembly 3 is transmission-connected to the output end of the second power source 72, and the torsional vibration damper 9 is transmission-connected between the first planetary gear assembly 2 and the second planetary gear assembly 3. Specifically, the first power source 71 may be an engine, and the second power source 72 may be a 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 transmission system.

[0038] In the embodiment of the present application, the torsional vibration of the transmission system is effectively reduced through the action of the elastic element and the damping element in the torsional vibration damper 9, and the influence of the vibration of the first power source 71 on the operation of the second power source 72 is greatly reduced, thereby improving the driving comfort of the vehicle and the reliability of the powertrain.

[0039] Continuing to refer to FIG. 1 , in the embodiment of the present application, the power source connected to the hybrid transmission includes two sources, one of which is composed of the first power source 71 and the second power source 72, and the other is composed of the third power source 73. The two parts of power are coupled to ensure the normal operation of the vehicle transmission system. Specifically, the third power source 73 can be a motor.

[0040] In some embodiments, the hybrid transmission also 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 transmission connect the third power source 73, the power coupling gear 5 is transmission connected 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.

[0041] 1 and 2 , FIG2 shows a schematic diagram of a first planetary gear assembly 2 in an embodiment of the present application. 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] Among them, the first sun gear 22 can be transmission-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, and the first ring gear 23 is meshed with the above-mentioned power coupling gear 5 to complete the operation of taking power from the first power source 71.

[0043] 3 shows a schematic diagram of a second planetary gear assembly in an embodiment of the present application. 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 the first planet carrier 21 .

[0044] Among them, the second sun gear 32 can be transmission-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 ring gear 33, and the second ring gear 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 connected to the first planetary carrier 21 in a transmission manner. The second power source 72 is decelerated by the second planetary gear assembly 3 and then connected to the first sun gear 22 of the first planetary gear assembly 2 by means of the torsional vibration damper 9. Then, the power coupling of the first power source 71 and the second power source 72 is achieved by 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] Among them, the second sun gear 32 is transmission-connected to the second power source 72 to realize the power taking operation of the second power source 72, the second ring gear 33 is fixedly connected to the inner wall of the shell 1 and does not rotate, and the power output by the second power source 72 is transmitted to the second planetary carrier 31 through the second planetary gear 34 to realize deceleration.

[0047] Specifically, the third power source 73 serves as another partial power source, and the output end of the third power source 73 is transmission-connected to the input end of the third input assembly 4, and the power-taking operation of the third power source 73 is realized by means of the meshing of the third input assembly 4 and the power coupling gear 5. In the embodiment of the present application, the third input assembly 4 can specifically be a gear transmission-connected to the output shaft of the third power source 73.

[0048] It can be understood that in the embodiment of the present application, since the transmission connection between the third power source 73 and the first power source 71 is achieved through a gear structure, the tooth shape and tooth gap design of the gear itself can limit the lateral movement of the gear and ensure that the gear runs on a predetermined trajectory.

[0049] Therefore, in the embodiment of the present application, the torque and vibration transmission between the first power source 71 and the third power source 73 that are connected through the gear structure is relatively small. Therefore, in the embodiment of the present application, the power coupling gear 5 is directly engaged with the first ring gear 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] Referring to Figures 1 and 4, Figure 4 shows a schematic diagram of a shift mechanism assembly in an embodiment of the present application. In some embodiments, the hybrid transmission further includes a shift mechanism assembly 6 encapsulated in the housing 1, and the shift mechanism assembly 6 includes a first gear assembly 61, a second gear assembly 62 and a shift gear sleeve 63.

[0051] The first gear assembly 61 and the second gear assembly 62 are arranged at intervals and are both transmission-connected to the power coupling gear 5 to realize the operation of taking power from the energy supply module 7. The shift gear sleeve 63 is movably arranged between the first gear assembly 61 and the second gear assembly 62, and can be engaged with 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] 4 , the first gear assembly 61 includes a first gear driving gear 611 and a first gear driven gear 612, which can be meshed and driven by means of the above-mentioned shifting gear sleeve 63; the second gear assembly 62 includes a second gear driving gear 621 and a second gear driven gear 622, which can also be meshed and driven by means of the above-mentioned shifting gear sleeve 63.

[0053] The first gear driving gear 611 and the second gear driving gear 621 are coaxially fixed to the above-mentioned power coupling gear 5 to achieve power taking operation.

[0054] As shown in FIG1 , in the embodiment of the present application, when the transmission system is actually in operation, the two parts of power will be coupled and the gear shifting operation will be performed through the gear shifting mechanism assembly 6. When the gear shifting sleeve 63 is meshed 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 transmitted to the first gear driven gear 612 for power output, and the second gear driven gear 622 is idle at this time; when the gear shifting sleeve 63 is meshed 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 transmitted to the second gear driven gear 622 for power output, and the first gear driven gear 612 is idle at this time. In some other embodiments, the gear shifting mechanism can also be replaced with a synchronizer or other similar gear shifting mechanism.

[0055] Continuing with reference to FIG. 1 , in some embodiments, the housing 1 includes a first accommodating cavity 11 and a second accommodating 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 accommodating cavity 12 to form a subassembly of the motor and the housing 1 .

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

[0057] In addition, in the embodiment of the present application, 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 accommodating cavity 11 to form a transmission system sub-assembly, so as to facilitate the integration of the motor and housing 1 sub-assembly with the transmission system sub-assembly.

[0058] In conjunction with FIGS. 1 to 4 , in some embodiments, the present application further provides a transmission system, specifically a vehicle transmission system, which includes a hybrid transmission as shown in any of the above embodiments and an energy supply module 7. Specifically, the energy 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 transmission-connected to the input end of the first planetary gear assembly 2, the second power source 72 is transmission-connected to the input end of the second planetary gear assembly 3, and the third power source 73 is transmission-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 a power source of the system, and the third power source 73 is another power source of the system. The present application realizes power take-off by coupling the two power sources.

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

[0061] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described 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 above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A hybrid transmission, characterized in that: The hybrid transmission comprises: A housing capable of being connected to the vehicle frame via a suspension; A first planetary gear assembly is encapsulated in the housing and is used for transmission connection with a first power source; A second planetary gear assembly, encapsulated in the housing and arranged corresponding to the first planetary gear assembly, for transmission connection with a second power source; and A torsional vibration damper is transmission-connected between the first planetary gear assembly and the second planetary gear assembly.

2. The hybrid transmission according to claim 1, characterized in that: The hybrid transmission further includes a third input assembly and a power coupling gear encapsulated in the housing, the third input assembly is used for transmission connection to a third power source, and the power coupling gear is transmission connected between the third input assembly and the first planetary gear assembly.

3. The hybrid transmission according to claim 1, characterized in that: 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 arranged on the first planet carrier. All of the first planetary gears are distributed along the circumference of the sun gear, and all of the first planetary gears are meshed between the first sun gear and the first ring gear.

4. The hybrid transmission according to claim 1, characterized in that: 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 arranged on the second planetary carrier. All of the second planetary gears are distributed along the circumference of the sun gear. All of the second planetary gears are meshed between the second sun gear and the second ring gear. The second ring gear is fixed to the housing.

5. The hybrid transmission according to any one of claims 1 to 4, characterized in that: The hybrid transmission also includes a shift mechanism assembly encapsulated in the housing, the shift mechanism assembly including a first gear assembly, a second gear assembly and a shift sleeve, the first gear assembly and the second gear assembly are both transmission-connected to the power coupling gear; the shift sleeve can be engaged with the first gear assembly or the second gear assembly.

6. The hybrid transmission according to claim 5, characterized in that: The first gear assembly includes a first gear driving gear and a first gear driven gear, and the first gear driving gear and the first gear driven gear can be meshed with the shift gear sleeve; the second gear assembly includes a second gear driving gear and a second gear driven gear, and the second gear driving gear and the second gear driven gear can be meshed with the shift gear sleeve; the first gear driving gear and the second gear driving gear are coaxially fixed to the power coupling gear.

7. A transmission system, characterized in that: The transmission system comprises: A hybrid transmission as claimed in any one of claims 1 to 6; and The energy supply module includes a first power source and a second power source which are spaced apart from each other, and the hybrid transmission is drivingly connected between the first power source and the second power source.

8. The transmission system according to claim 7, characterized in that: The first power source is an engine, and the output end of the first power source is transmission-connected to the first planetary gear assembly; the second power source is an electric motor, and the output end of the second power source is transmission-connected to the second planetary gear assembly.

9. The transmission system according to claim 7, characterized in that: The power source also includes a third power source, the output end of the third power source is transmission-connected to the shift mechanism assembly, and the third power source is a motor.

10. A vehicle, characterized in that: It comprises a hybrid transmission as described in any one of claims 1 to 6, or a transmission system as described in any one of claims 7 to 9.

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