Vehicle transmission, power system and vehicle

Abstract

The utility model provides a vehicle transmission, a power system and a vehicle, and relates to the technical field of vehicles. The vehicle transmission includes a housing, a transmission input shaft, an electric machine output shaft, a first epicyclic gear train, and a second epicyclic gear train. The transmission input shaft is rotationally connected with the shell; an output shaft of the motor is rotationally connected with the shell; the first planet carrier and the first gear ring are both rotationally connected with the shell, the first planet carrier is in transmission connection with a transmission input shaft and is in transmission connection with a motor output shaft, and the first sun gear and the shell are separably fixed; the second sun gear and the first planet carrier are coaxially fixed, the second planet carrier and the first gear ring are coaxially fixed, the second planet carrier is in transmission connection with the axle, and the second gear ring and the shell are detachably fixed. The vehicle transmission is used for changing the transmission ratio between a motor output shaft and wheels and changing the transmission ratio between an engine output shaft and the wheels. The vehicle transmission can reduce energy consumption.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicles, in particular to a vehicle transmission, a power system and a vehicle. BACKGROUND

[0002] In the related art, the transmission ratio between the output end of the dedicated hybrid transmission (DHT) and the motor output shaft is fixed. In the case of needing to change the vehicle speed, the speed of the motor needs to be changed, which results in high energy consumption. CONTENT OF THE UTILITY MODEL

[0003] The present application provides a vehicle transmission, a power system and a vehicle, which can reduce energy consumption.

[0004] In a first aspect, the present application provides a vehicle transmission, which comprises a housing, a transmission input shaft, a motor output shaft, a first epicyclic gear train and a second epicyclic gear train. The transmission input shaft is rotatably connected to the housing; the motor output shaft is rotatably connected to the housing; the first epicyclic gear train comprises a first carrier, a first ring gear and a first sun gear, the first carrier and the first ring gear are both rotatably connected to the housing, the first carrier is in transmission connection with the transmission input shaft and the motor output shaft, and the first sun gear is separably fixed to the housing; the second epicyclic gear train comprises a second carrier, a second ring gear and a second sun gear, the second sun gear is coaxially fixed to the first carrier, the second carrier is coaxially fixed to the first ring gear, the second carrier is configured to be in transmission connection with an axle, and the second ring gear is separably fixed to the housing.

[0005] The vehicle transmission provided by the present application comprises a first epicyclic gear train and a second epicyclic gear train, the first carrier and the second sun gear can rotate relative to the housing under the driving of the transmission input shaft and the motor output shaft, the first ring gear can rotate relative to the housing under the driving of the first carrier, and the second carrier can rotate relative to the housing under the driving of the second sun gear, so that the first ring gear and the second carrier can drive the axle to rotate relative to the vehicle body. By separably fixing the first sun gear to the housing and separably fixing the second ring gear to the housing, the transmission ratio between the motor output shaft and the axle can be adjusted. In the case of not changing the speed of the motor, adjusting the connection state of the first sun gear and the housing and the connection state of the second ring gear and the housing can change the speed of the axle relative to the vehicle body, and thus change the vehicle speed. Therefore, in the case of needing to change the vehicle speed, the speed of the motor can remain unchanged, the vehicle speed can be changed by adjusting the connection state of the first sun gear and the housing and the connection state of the second ring gear and the housing, and energy consumption can be reduced.

[0006] With reference to the first aspect, in some possible implementation manners, one of the first planet carrier and the second planet carrier is movably provided with a locking member, the locking member has a locking position and a separation position, in the locking position, the locking member is connected to the other one of the first planet carrier and the second planet carrier to fixedly connect the first planet carrier and the second planet carrier, in the separation position, the other one of the first planet carrier and the second planet carrier is separated from the locking member to disconnect the first planet carrier and the second planet carrier.

[0007] By arranging the locking member, the torque of the first planet carrier can be directly transmitted to the second planet carrier through the locking member, the first epicyclic gear train and the second epicyclic gear train can rotate synchronously, more speed ratios between the motor output shaft and the axle can be achieved, the number of gears of the vehicle transmission is increased, and the adaptability of the vehicle is improved.

[0008] With reference to the first aspect and the above implementation manners, in some possible implementation manners, the vehicle transmission further includes a fixing member movably arranged in the housing, the fixing member has a connection position and a disconnection position, in the connection position, the fixing member is connected to the first sun gear to fixedly connect the first sun gear and the housing, in the disconnection position, the fixing member is separated from the first sun gear to disconnect the first sun gear and the housing.

[0009] By movably arranging the fixing member in the housing, the fixing member can be connected to or separated from the first sun gear, the first sun gear and the housing are fixedly connected in a separable manner, and the structure is relatively simple.

[0010] With reference to the first aspect and the above implementation manners, in some possible implementation manners, along the axial direction of the first epicyclic gear train, the fixing member is located on the side of the first epicyclic gear train away from the second epicyclic gear train; the vehicle transmission further includes a first connecting shaft coaxial with the first epicyclic gear train, a first end of the first connecting shaft is located on the side of the first sun gear away from the second sun gear, the first end of the first connecting shaft is rotationally connected to the housing, and a second end of the first connecting shaft extends to the other side of the first sun gear through the first sun gear, and the second end of the first connecting shaft is fixedly connected to the first planet carrier.

[0011] In this way, the first planet carrier is rotationally connected to the housing through the first connecting shaft, along the axial direction of the first epicyclic gear train, the first end of the first connecting shaft and the fixing member are located on the same side of the first sun gear, the first end of the first connecting shaft is rotationally connected to the housing, and the second end extends to the other side of the first sun gear and is fixedly connected to the first planet carrier, that is, the part of the first planet carrier for connecting the first connecting shaft and the fixing member are located on opposite sides of the first sun gear, which makes the arrangement of the first planet carrier not easily affect the arrangement of the fixing member, the first planet carrier is not easily interfered with the fixing member, and the arrangement of the fixing member is facilitated.

[0012] With reference to the first aspect and the above implementation manner, in some possible implementation manners, the second carrier includes a second mounting shaft, and the second planetary gears of the second epicyclic gear train are sleeved on the second mounting shaft; and the vehicle transmission further includes a connecting piece, which is located between the first epicyclic gear train and the second epicyclic gear train along the axial direction of the first epicyclic gear train, and one end of the connecting piece is fixedly connected with the first ring gear and the other end is fixedly connected with the second mounting shaft.

[0013] In this way, the connecting piece fixes the first ring gear and the second carrier, and the connecting piece is located between the first epicyclic gear train and the second epicyclic gear train, so that the space between the first epicyclic gear train and the second epicyclic gear train is fully utilized, and the compactness of the structure is improved. One end of the connecting piece is fixedly connected with the ring gear, and the other end is fixedly connected with the second mounting shaft, that is, the second mounting shaft is used not only for mounting the second planetary gears but also for connecting with the connecting piece, so that the second mounting shaft is fully utilized, and the compactness of the structure is improved.

[0014] With reference to the first aspect and the above implementation manner, in some possible implementation manners, the vehicle transmission further includes a second connecting shaft, the second connecting shaft is coaxial with the second epicyclic gear train, the second connecting shaft is arranged on the side of the second epicyclic gear train away from the first epicyclic gear train along the axial direction, one end of the second connecting shaft is fixedly connected with the second carrier, and the other end is rotatably connected with the housing.

[0015] In this way, the second carrier is rotatably connected with the housing through the second connecting shaft, and the part of the second carrier used for connecting with the second connecting shaft is located on the side of the second sun gear away from the first sun gear, so that the arrangement of the second carrier does not easily affect the arrangement of the first epicyclic gear train, the second carrier does not easily interfere with the first epicyclic gear train, and the arrangement of the first epicyclic gear train and the second epicyclic gear train is facilitated.

[0016] With reference to the first aspect and the above implementation manner, in some possible implementation manners, the vehicle transmission further includes a third epicyclic gear train, the third epicyclic gear train includes a third carrier, a third ring gear and a third sun gear, the third carrier is fixedly coaxial with the transmission input shaft, the third sun gear is fixedly coaxial with the motor output shaft, and the third ring gear is in transmission connection with the first carrier.

[0017] By making the third ring gear in transmission connection with the first carrier and the third sun gear fixedly coaxial with the motor output shaft, the motor output shaft is in transmission connection with the first carrier, which is relatively convenient to implement. By making the third carrier fixedly coaxial with the transmission input shaft, the transmission input shaft is in transmission connection with the first carrier, which is relatively convenient to implement, and the transmission input shaft can simultaneously drive the first carrier and the motor output shaft to rotate relative to the housing, the power of the engine is split, the engine can drive the wheels to rotate on one hand and can drive the motor to generate electricity on the other hand, and the cruising range of the vehicle is improved.

[0018] In some possible implementation manners, in combination with the first aspect and the foregoing implementation manners, one of the third planet carrier, the third ring gear and the third sun gear is movably connected with a locking member, the locking member has a locking position and a separated position, in the locking position, the locking member is connected to another one of the third planet carrier, the third ring gear and the third sun gear, so that the third planet carrier, the third ring gear and the third sun gear are relatively fixed, in the separated position, the other one of the third planet carrier, the third ring gear and the third sun gear is separated from the locking member.

[0019] In this way, the vehicle transmission can realize more working conditions. In the separated position, the third planet carrier, the third ring gear and the third sun gear can relatively rotate, the engine can drive the wheels to rotate on one hand and can make the motor generate electricity on the other hand, and the rotating speed of the motor is relatively large relative to the rotating speed of the engine, which is beneficial to making the power generation efficiency relatively high; in the locking position, the third planet carrier, the third ring gear and the third sun gear synchronously rotate relative to the housing, which is beneficial to improving the driving torque of the motor and the engine on the third ring gear, thereby improving the driving torque on the wheels.

[0020] In a second aspect, the present application provides a power system, the power system comprising an engine, a first axle and the vehicle transmission provided in the first aspect and the foregoing implementation manners of the present application. The second planet carrier is in transmission connection with the first axle, and the transmission input shaft has at least a connection state, in which the transmission input shaft is in transmission connection with the output shaft of the engine.

[0021] The power system provided in the present application comprises the vehicle transmission provided in the first aspect and the foregoing implementation manners of the present application, and can achieve the same technical effects, i.e., can reduce energy consumption.

[0022] In a third aspect, the present application provides a vehicle, the vehicle comprising the power system provided in the second aspect of the present application.

[0023] The vehicle provided in the present application comprises the power system provided in the second aspect of the present application, and can achieve the same technical effects, i.e., can reduce energy consumption. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without any creative effort based on these drawings.

[0025] Figure 1 is a structural schematic view of the connection between the engine and the vehicle transmission in the embodiments of the present application;

[0026] Figure 2Fig. 6 is a structural schematic view of a second motor, a third reduction gear and a fourth reduction gear in the embodiment of the present application.

[0027] Reference Signs List:

[0028] 1. Vehicle transmission; 101, transmission input shaft; 102, motor output shaft; 103, first epicyclic gear train; 1031, first carrier; 10311, first mounting shaft; 10312, first connecting portion; 1032, first ring gear; 1033, first sun gear; 104, second epicyclic gear train; 1041, second carrier; 10411, second mounting shaft; 10412, second connecting portion; 1042, second ring gear; 1043, second sun gear; 105, locking member; 106, fixing member; 107, second brake; 108, first connecting shaft; 109, second connecting shaft; 120, connecting member; 121, third epicyclic gear train; 1211, third carrier; 1212, third ring gear; 1213, third sun gear; 122, locking member; 123, first reduction gear; 124, second reduction gear; 125, first output shaft; 126, first motor; 3, engine; 4, first clutch; 5, second motor; 6, third reduction gear; 7, fourth reduction gear; 8, second output shaft; 9, differential. DETAILED DESCRIPTION

[0029] The technical solutions in the present application will be described clearly and exhaustively below in combination with the drawings.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this application.

[0031] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase "in an embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily all directed to the same

[0032] Hereinafter, the terms "first" and "second" are used only for the purpose of description, and cannot be understood as implying or suggesting relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first" and "second" can explicitly or implicitly include one or more of the features.

[0033] In the description of the embodiments of the present application, unless specifically defined and limited otherwise, the terms "mounting", "connection", "connecting", "fixed", and other similar terms should be interpreted broadly, for example, can be fixed connection, can also be detachable connection, or integrated; can be mechanical connection, can also be electrical connection; can be direct connection, can also be indirect connection through an intermediate medium, can be internal communication of two elements or interaction relationship between two elements. For those skilled in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0034] The vehicle provided by the embodiments of the present application can be of various types, and exemplarily can be a sedan, an off-road vehicle, or a sport utility vehicle (SUV), etc.

[0035] Please refer to Figure 1 The vehicle in the embodiments of the present application comprises a power system, the power system comprising a vehicle transmission 1, an engine 3, and a first axle. The vehicle transmission 1 comprises a housing, a transmission input shaft 101, a motor output shaft 102, a first epicyclic gear train 103, and a second epicyclic gear train 104.

[0036] Please refer to Figure 1 The transmission input shaft 101 in the embodiments of the present application is rotationally connected with the housing. It should be explained that the axis of rotation of the transmission input shaft 101 relative to the housing is the same as the axis of the transmission input shaft 101.

[0037] Please refer to Figure 1 The transmission input shaft 101 in the embodiments of the present application has at least a connected state, in which the transmission input shaft 101 is drivingly connected with the output shaft of the engine 3. In the connected state, the output shaft of the engine 3 can drive the transmission input shaft 101 to rotate relative to the housing. In some embodiments of the present application, the power system further comprises a first clutch 4, which is arranged between the transmission input shaft 101 and the output shaft of the engine 3. The transmission input shaft 101 and the output shaft of the engine 3 are connected or separated through the first clutch 4. When the first clutch 4 is in the engaged state, the transmission input shaft 101 is in the connected state. When the first clutch 4 is in the separated state, the transmission input shaft 101 is separated from the output shaft of the engine 3, and the driving connection between the transmission input shaft 101 and the output shaft of the engine 3 is disconnected.

[0038] Please refer to Figure 1 In some embodiments of the present application, in the connected state, the transmission input shaft 101 can be coaxially fixed with the output shaft of the engine 3.

[0039] Please refer to Figure 1In the embodiment of the present application, the vehicle transmission comprises a first motor 126, the motor output shaft 102 is an output shaft of the first motor 126, the motor output shaft 102 is rotationally connected with the housing, and the axis of rotation of the motor output shaft 102 relative to the housing is the same as the axis of the motor output shaft 102.

[0040] Please refer to Figure 1 In the embodiment of the present application, the transmission input shaft 101 is rotationally connected with the housing; the motor output shaft 102 is rotationally connected with the housing; the first epicyclic gear train 103 comprises a first carrier 1031, a first ring gear 1032 and a first sun gear 1033, the first carrier 1031 and the first ring gear 1032 are both rotationally connected with the housing, the first carrier 1031 is drivingly connected with the transmission input shaft 101 and drivingly connected with the motor output shaft 102, and the first sun gear 1033 is separably fixed with the housing; the second epicyclic gear train 104 comprises a second carrier 1041, a second ring gear 1042 and a second sun gear 1043, the second sun gear 1043 is coaxially fixed with the first carrier 1031, the second carrier 1041 is coaxially fixed with the first ring gear 1032, the second carrier 1041 is drivingly connected with the first axle, and the second ring gear 1042 is separably fixed with the housing.

[0041] In this way, the vehicle transmission 1 comprises the first epicyclic gear train 103 and the second epicyclic gear train 104, the first carrier 1031 and the second sun gear 1043 can rotate relative to the housing under the driving of the transmission input shaft 101 and the motor output shaft 102, the first ring gear 1032 can rotate relative to the housing under the driving of the first carrier 1031, the second carrier 1041 can rotate relative to the housing under the driving of the second sun gear 1043, and thus the first ring gear 1032 and the second carrier 1041 can drive the first axle to rotate relative to the vehicle body. By separably fixing the first sun gear 1033 with the housing and separably fixing the second ring gear 1042 with the housing, the speed ratio between the motor output shaft 102 and the first axle can be adjusted, so that in the case that the speed of the first motor 126 remains unchanged, adjusting the connection state of the first sun gear 1033 with the housing and the connection state of the second ring gear 1042 with the housing can change the speed of the first axle relative to the vehicle body, and thus change the vehicle speed. Therefore, the vehicle transmission 1 provided by the present application can change the vehicle speed by adjusting the connection state of the first sun gear 1033 with the housing and the connection state of the second ring gear 1042 with the housing without changing the speed of the first motor 126 when the vehicle speed needs to be changed, and can reduce energy consumption.

[0042] Moreover, in the embodiment of the application, the transmission input shaft 101 is in transmission connection with the first planet carrier 1031, so that the first epicyclic gear train 103 and the second epicyclic gear train 104 can not only transmit the torque of the motor, but also transmit the torque of the engine 3, the first epicyclic gear train 103 and the second epicyclic gear train 104 are fully utilized, so that the structure of the power system is relatively compact, and the form of driving of the first axle is more abundant. Please refer to Figure 1 It can be understood that, in the embodiment of the application, the first epicyclic gear train 103 and the second epicyclic gear train 104 are coaxial. Generally, in some embodiments of the application, the first epicyclic gear train 103 and the second epicyclic gear train 104 are arranged in the axial direction.

[0043] Please refer to Figure 1 It can be understood that, in the embodiment of the application, the axis of the first epicyclic gear train 103, the axis of the first planet carrier 1031, the axis of the first ring gear 1032, the axis of the first sun gear 1033, the axis of the second epicyclic gear train 104, the axis of the second planet carrier 1041, the axis of the second ring gear 1042 and the axis of the second sun gear 1043 are the same. The first planet carrier 1031, the first ring gear 1032, the first sun gear 1033, the second planet carrier 1041, the second ring gear 1042 and the second sun gear 1043 are in rotational connection with the housing, and the axes of relative rotation are all the axes of the first epicyclic gear train 103.

[0044] Please refer to Figure 1 In some embodiments of the application, the axial direction of the epicyclic gear train is parallel or perpendicular to the vertical direction. In this way, the vehicle transmission 1 is facilitated to be arranged in the engine 3 cabin.

[0045] Please refer to Figure 1 It can be understood that, in the embodiment of the application, the first planet carrier 1031 is in transmission connection with the transmission input shaft 101 and the motor output shaft 102, the motor output shaft 102 and the transmission input shaft 101 can drive the first planet carrier 1031 to rotate relative to the housing, and further drive the first ring gear 1032 to rotate relative to the housing. The housing is relatively fixed to the vehicle body, and in the process of the first ring gear 1032 rotating relative to the housing, the first ring gear 1032 drives the first axle to rotate relative to the vehicle body. That is, the motor output shaft 102 can transmit the torque of the first motor 126 to the first planet carrier 1031, the transmission input shaft 101 can transmit the torque of the engine 3 to the first planet carrier 1031, the first planet carrier 1031 can transmit the torque of the motor output shaft 102 and the torque of the transmission input shaft 101 to the first ring gear 1032, and the first ring gear 1032 can transmit the torque of the first planet carrier 1031 to the first axle.

[0046] Please refer to Figure 1It can be understood that, in the embodiment of the application, the second sun gear 1043 is coaxially fixed with the first planet carrier 1031, the motor output shaft 102 and the transmission input shaft 101 can drive the second sun gear 1043 to rotate relative to the housing, and then drive the second planet carrier 1041 to rotate relative to the housing. The housing is relatively fixed with the vehicle body, and in the process of rotating the second planet carrier 1041 relative to the housing, the second planet carrier 1041 drives the first axle to rotate relative to the vehicle body. That is, the motor output shaft 102 can transmit the torque of the first motor 126 to the second sun gear 1043, the transmission input shaft 101 can transmit the torque of the engine 3 to the second sun gear 1043, the second sun gear 1043 can transmit the torque of the motor output shaft 102 and the torque of the transmission input shaft 101 to the second planet carrier 1041, and the second planet carrier 1041 can transmit the torque of the second sun gear 1043 to the first axle.

[0047] Please refer to Figure 1 In some embodiments of the application, the vehicle transmission 1 further comprises a first reduction gear 123 and a second reduction gear 124, the first reduction gear 123 is coaxially fixed with the second planet carrier 1041, the second reduction gear 124 is engaged with the first reduction gear 123, the number of teeth of the second reduction gear 124 is greater than that of the first reduction gear 123, the first output shaft 125 is coaxially fixed with the second reduction gear 124, and the first output shaft 125 is drivingly connected with the first axle. In this way, the vehicle transmission 1 is drivingly connected with the first axle through the first reduction gear 123 and the second reduction gear 124, the number of teeth of the second reduction gear 124 is greater than that of the first reduction gear 123, and the effect of speed reduction and torque increase can be achieved. In some embodiments of the application, the power system further comprises a differential 9, and the first output shaft 125 can be drivingly connected with the differential 9 through a reduction gear pair.

[0048] Please refer to Figure 1 It can be understood that, in the embodiment of the application, the first sun gear 1033 is fixed with the housing, and the second ring gear 1042 is separated from the housing and can rotate relative to the housing. In the case that the second ring gear 1042 is fixed with the housing, the first sun gear 1033 is separated from the housing and can rotate relative to the housing.

[0049] Please refer to Figure 1In some embodiments of the present application, one of the first planet carrier 1031 and the second planet carrier 1041 is movably provided with a locking member 105, the locking member 105 has a locking position and a separation position, in the locking position, the locking member 105 is connected to the other one of the first planet carrier 1031 and the second planet carrier 1041 to fixedly connect the first planet carrier 1031 and the second planet carrier 1041, in the separation position, the other one of the first planet carrier 1031 and the second planet carrier 1041 is separated from the locking member 105 to disconnect the fixed connection between the first planet carrier 1031 and the second planet carrier 1041. By providing the locking member 105, the torque of the first planet carrier 1031 can be directly transmitted to the second planet carrier 1041 through the locking member 105, the first epicyclic gear train 103 and the second epicyclic gear train 104 can synchronously rotate, so that more speed ratios between the motor output shaft 102 and the first axle can be achieved, so that the gear positions of the vehicle transmission 1 are increased, and the adaptability of the vehicle is improved.

[0050] Please refer to Figure 1 In some embodiments of the present application, the vehicle transmission 1 further comprises a second clutch, the second clutch is arranged between the first planet carrier 1031 and the second planet carrier 1041, in the engaged state of the second clutch, the first planet carrier 1031 and the second planet carrier 1041 are fixedly connected, in the separated state of the second clutch, the first planet carrier 1031 and the second planet carrier 1041 can relatively rotate. It can be understood that, in the embodiments of the present application, the locking member 105 is a pressure plate of the second clutch.

[0051] Please refer to Figure 1 In some embodiments of the present application, the vehicle transmission 1 further comprises a fixing member 106, the fixing member 106 is movably arranged in the housing, the fixing member 106 has a connected position and a disconnected position, in the connected position, the fixing member 106 is connected with the first sun gear 1033 to fixedly connect the first sun gear 1033 and the housing, in the disconnected position, the fixing member 106 is separated from the first sun gear 1033 to disconnect the fixed connection between the first sun gear 1033 and the housing. By movably arranging the fixing member 106 in the housing, the fixing member 106 can be connected or separated from the first sun gear 1033, so that the separable fixing of the first sun gear 1033 and the housing is more conveniently achieved, and the structure is relatively simple.

[0052] Please refer to Figure 1 It can be understood that, in the embodiments of the present application, the fixing member 106 is movably arranged in the housing, so that the fixing member 106 can move relative to the housing to move to the connected position and the disconnected position, the connected position and the disconnected position are two positions of the fixing member 106 relative to the housing.

[0053] Please refer to Figure 1In some embodiments of the present application, the vehicle transmission 1 further comprises a first brake, the first brake is arranged in the housing, the fixing member 106 is a brake caliper of the first brake, the brake caliper of the first brake clamps the central shaft coaxially fixed to the first sun gear 1033, so that the first sun gear 1033 is fixed with the housing, and the brake caliper of the first brake is separated from the central shaft, so that the sun gear can rotate relative to the housing.

[0054] Please refer to Figure 1 In some embodiments of the present application, the vehicle transmission 1 further comprises a second brake 107, the second brake 107 is arranged in the housing, the second brake 107 has a braking state and a release state, in the braking state, the brake caliper of the second brake 107 clamps the second ring gear 1042, so that the second ring gear 1042 is fixed with the housing, in the release state, the brake caliper of the second brake 107 is separated from the second ring gear 1042, so that the second ring gear 1042 can rotate relative to the housing.

[0055] Please refer to Figure 1 In some embodiments of the present application, along the axial direction of the first epicyclic gear train 103, the fixing member 106 is located on the side of the first epicyclic gear train 103 away from the second epicyclic gear train 104; the vehicle transmission 1 further comprises a first connecting shaft 108, the first connecting shaft 108 is coaxial with the first epicyclic gear train 103, a first end of the first connecting shaft 108 is located on the side of the first sun gear 1033 away from the second sun gear 1043, the first end of the first connecting shaft 108 is rotationally connected with the housing, a second end of the first connecting shaft 108 extends to the other side of the first sun gear 1033 through the first sun gear 1033, and the second end of the first connecting shaft 108 is fixedly connected with the first planet carrier 1031. In this way, the first planet carrier 1031 is rotationally connected with the housing through the first connecting shaft 108, along the axial direction of the first epicyclic gear train 103, the first end of the first connecting shaft 108 and the fixing member 106 are located on the same side of the first sun gear 1033, the first end of the first connecting shaft 108 is rotationally connected with the housing, and the second end extends to the other side of the first sun gear 1033 through the first sun gear 1033 and is fixedly connected with the first planet carrier 1031, that is, along the axial direction of the first sun gear 1033, the part of the first planet carrier 1031 used for connecting with the first connecting shaft 108 and the fixing member 106 are located on opposite sides of the first sun gear 1033, which makes the arrangement of the first planet carrier 1031 not easily affect the arrangement of the fixing member 106, and the first planet carrier 1031 is not easily interfered with the fixing member 106, facilitating the arrangement of the fixing member 106.

[0056] Please refer to Figure 1 In some embodiments of the present application, the motor output shaft 102 and the transmission input shaft 101 can be in transmission connection with the first end of the first connecting shaft 108, so as to be in transmission connection with the first planet carrier 1031.

[0057] Please refer to Figure 1 In some embodiments of the present application, the first carrier 1031 comprises a first mounting shaft 10311 and a first connecting portion 10312, the first connecting portion 10312 is located between the first sun gear 1033 and the second sun gear 1043 in the axial direction of the first sun gear 1033, one end of the first connecting portion 10312 is fixedly connected with the first mounting shaft 10311, and the other end extends to the central axis of the first sun gear 1033 and is fixedly connected with the second end of the first connecting shaft 108.

[0058] Please refer to Figure 1 In some embodiments of the present application, the second end of the first connecting shaft 108 is located between the first sun gear 1033 and the second sun gear 1043 in the axial direction of the first sun gear 1033, and the second end of the first connecting shaft 108 is fixedly connected with the second sun gear 1043. In this way, the fixed connection between the first carrier 1031 and the second sun gear 1043 is more conveniently achieved.

[0059] Please refer to Figure 1 In some embodiments of the present application, the second carrier 1041 comprises a second mounting shaft 10411, and the second planetary gear set 104 of the second epicyclic gear train 104 is sleeved on the second mounting shaft 10411; the vehicle transmission 1 further comprises a connecting piece 120, the connecting piece 120 is located between the first epicyclic gear train 103 and the second epicyclic gear train 104 in the axial direction of the first epicyclic gear train 103, one end of the connecting piece 120 is fixedly connected with the first ring gear 1032, and the other end is fixedly connected with the second mounting shaft 10411. In this way, the connecting piece 120 fixes the first ring gear 1032 and the second carrier 1041, and the connecting piece 120 is located between the first epicyclic gear train 103 and the second epicyclic gear train 104, which fully utilizes the space between the first epicyclic gear train 103 and the second epicyclic gear train 104, and is conducive to improving the compactness of the structure. One end of the connecting piece 120 is fixedly connected with the ring gear, and the other end is fixedly connected with the second mounting shaft 10411, that is, the second mounting shaft 10411 is not only used for mounting the second planetary gear, but also used for connecting with the connecting piece 120, and the second mounting shaft 10411 is fully utilized, which is conducive to improving the compactness of the structure.

[0060] Please refer to Figure 1In some embodiments of the present application, the vehicle transmission 1 further comprises a second connecting shaft 109 coaxial with the second epicyclic gear train 104, the second connecting shaft 109 is arranged axially on the side of the second epicyclic gear train 104 away from the first epicyclic gear train 103, one end of the second connecting shaft 109 is fixedly connected with the second carrier 1041, and the other end is rotatably connected with the housing. In this way, the second carrier 1041 is rotatably connected to the housing through the second connecting shaft 109, and the part of the second carrier 1041 used for connection with the second connecting shaft 109 is located on the side of the second sun gear 1043 away from the first sun gear 1033, so that the arrangement of the second carrier 1041 does not easily affect the arrangement of the first epicyclic gear train 103, the second carrier 1041 does not easily interfere with the first epicyclic gear train 103, and the arrangement of the first epicyclic gear train 103 and the second epicyclic gear train 104 is facilitated.

[0061] For reference Figure 1 In some embodiments of the present application, the second carrier 1041 comprises a second connecting portion 10412, which is located on the side of the second sun gear 1043 away from the first sun gear 1033 along the axial direction of the first sun gear 1033, one end of the second connecting portion 10412 is fixedly connected with the second mounting shaft 10411, and the other end extends to the central axis of the second sun gear 1043 and is fixedly connected with the first end of the second connecting shaft 109.

[0062] For reference Figure 1 In some embodiments of the present application, the second carrier 1041 can be connected with the first axle drive through the second end of the second connecting shaft 109. On this basis, in some embodiments of the present application, the first reduction gear 123 can be fixed coaxially with the second end of the second connecting shaft 109.

[0063] For reference Figure 1In some embodiments of the application, the vehicle transmission 1 further comprises a third epicyclic gear train 121, the third epicyclic gear train 121 comprising a third carrier 1211, a third ring gear 1212 and a third sun gear 1213, the third carrier 1211 being coaxially fixed with the transmission input shaft 101, the third sun gear 1213 being coaxially fixed with the motor output shaft 102, the third ring gear 1212 being drivingly connected with the first carrier 1031. By drivingly connecting the third ring gear 1212 with the first carrier 1031 and coaxially fixing the third sun gear 1213 with the motor output shaft 102, the motor output shaft 102 is drivingly connected with the first carrier 1031 conveniently. By coaxially fixing the third carrier 1211 with the transmission input shaft 101, the transmission input shaft 101 is drivingly connected with the first carrier 1031 conveniently, and the transmission input shaft 101 can drive the first carrier 1031 and the motor output shaft 102 to rotate relative to the housing simultaneously, the power of the engine 3 is split, the engine 3 can drive the wheels to rotate and generate electricity for the first motor 126, and the vehicle's cruising range is improved.

[0064] For your convenience Figure 1 In some embodiments of the application, the third ring gear 1212 is coaxially fixed with the first carrier 1031. In this way, the third ring gear 1212 is drivingly connected with the first carrier 1031 conveniently. In some embodiments of the application, the third ring gear 1212 is coaxially fixed with the first end of the first connecting shaft 108, and in this way, the third ring gear 1212 is drivingly connected with the first carrier 1031 conveniently.

[0065] For your convenience Figure 1In some embodiments of the present application, one of the third planet carrier 1211, the third ring gear 1212 and the third sun gear 1213 is movably connected with a locking member 122, the locking member 122 has a locking position and a separated position, in the locking position, the locking member 122 is connected with the other one of the third planet carrier 1211, the third ring gear 1212 and the third sun gear 1213, so that the third planet carrier 1211, the third ring gear 1212 and the third sun gear 1213 are relatively fixed, in the separated position, the other one of the third planet carrier 1211, the third ring gear 1212 and the third sun gear 1213 is separated from the locking member 122. In this way, more working conditions of the vehicle transmission 1 can be realized, in the separated position, the third planet carrier 1211, the third ring gear 1212 and the third sun gear 1213 can relatively rotate, on the one hand, the engine 3 can drive the wheels to rotate, on the other hand, the engine 3 can drive the first motor 126 to generate electricity, and the rotating speed of the first motor 126 is relatively large compared with the rotating speed of the engine 3, which is beneficial to the generation of electricity; in the locking position, the third planet carrier 1211, the third ring gear 1212 and the third sun gear 1213 synchronously rotate relative to the housing, which is beneficial to the driving torque of the first motor 126 and the engine 3 on the third ring gear 1212.

[0066] Please refer to Figure 2 In some embodiments of the present application, the vehicle transmission 1 further comprises a third clutch, the third clutch is arranged between the third planet carrier 1211 and the third ring gear 1212, so as to fix or separate the third planet carrier 1211 and the third ring gear 1212, that is, the third planet carrier 1211 and the third ring gear 1212 can relatively rotate. It can be understood that, in this embodiment, the locking member is the pressure plate of the third clutch.

[0067] Please refer to Figure 1 and Figure 2 In some embodiments of the present application, the power system further comprises a second motor 5, the stator of the second motor 5 is relatively fixed to the vehicle body, and the output shaft of the second motor 5 is in transmission connection with the second axle. In this way, the ability of the vehicle to get out of trouble can be improved.

[0068] Please refer to Figure 1 and Figure 2 In some embodiments of the present application, the power system further comprises a third reduction gear 6 and a fourth reduction gear 7, the third reduction gear 6 is coaxially fixed to the output shaft of the second motor 5, the fourth reduction gear 7 is in meshing connection with the third reduction gear 6, the fourth reduction gear 7 has a larger number of teeth than the third reduction gear 6, and the fourth reduction gear 7 is coaxially fixed with a second output shaft 8, and the second output shaft 8 is in transmission connection with the second axle. In this way, the third reduction gear 6 and the fourth reduction gear 7 can achieve the effect of reducing speed and increasing distance.

[0069] Please refer toFigure 1 and Figure 2 In some embodiments of the present application, the first axle is a front axle and the second axle is a rear axle. In some embodiments of the present application, the first axle can also be a rear axle and the second axle is a front axle.

[0070] The various working conditions of the power system in some embodiments of the present application are described in detail below.

[0071] Please refer to Figure 1 , Figure 2 and Table 1, in some embodiments of the present application, the power system has a pure electric driving condition, a power split condition, an engine direct driving condition and a parallel driving condition.

[0072] In the pure electric driving condition, the first clutch 4 is in the separated state, the engine 3 is not working, the locking member 122 is in the locking position, and the first motor 126 and the second motor 5 are both used as electric motors. The motor output shaft 102 drives the third sun gear 1213, the third ring gear 1212 and the third carrier 1211 to rotate synchronously relative to the housing, the third ring gear 1212 drives the first connecting shaft 108 to rotate relative to the housing, the first connecting shaft 108 drives the first reduction gear 123 to rotate relative to the housing through the first epicyclic gear train 103 and the second epicyclic gear train 104, the first reduction gear 123 drives the second reduction gear 124 to rotate relative to the housing, and the second reduction gear 124 drives the first axle to rotate relative to the vehicle body through the first output shaft 125. The second motor 5 drives the third reduction gear 6 to rotate relative to the vehicle body, the third reduction gear 6 drives the fourth reduction gear 7 to rotate relative to the vehicle body, and the fourth reduction gear 7 drives the second axle to rotate relative to the vehicle body through the second output shaft 8.

[0073] Please refer to Figure 1 , Figure 2 and Table 1, in some embodiments of the present application, the pure electric driving condition further includes a first-gear pure electric driving condition, a first-gear reverse pure electric driving condition, a second-gear pure electric driving condition, a second-gear reverse pure electric driving condition, a third-gear pure electric driving condition and a third-gear reverse pure electric driving condition.

[0074] In the first-gear pure electric driving condition, the locking member 105 is in the separated position, the fixing member 106 is in the disconnected position, the second brake 107 is in the braking state, the motor output shaft 102 rotates in the forward direction, and the output shaft of the second motor 5 rotates in the forward direction. In this way, the second ring gear 1042 is fixedly connected with the housing, the first connecting shaft 108 drives the second sun gear 1043 to rotate relative to the housing, the second sun gear 1043 drives the second carrier 1041 to move relative to the housing, and the second carrier 1041 drives the first axle to rotate relative to the vehicle body through the first reduction gear 123 and the second reduction gear 124.

[0075] In the first-gear reverse pure electric drive working condition, the locking member 105 is in the separated position, the fixing member 106 is in the disconnected position, the second brake 107 is in the released state, the motor output shaft 102 is reversed, and the output shaft of the second motor 5 is reversed. In the case of the reversed motor output shaft 102, the rotation direction of the motor output shaft 102 relative to the stator of the first motor 126 is opposite to that in the case of the forward motor output shaft 102, and in the case of the reversed output shaft of the second motor 5, the rotation direction of the output shaft of the second motor 5 relative to the stator of the second motor 5 is opposite to that in the case of the forward output shaft of the second motor 5.

[0076] In the second-gear pure electric drive working condition, the locking member 105 is in the locked position, the fixing member 106 is in the disconnected position, the second brake 107 is in the released state, the motor output shaft 102 is forward rotated, and the output shaft of the second motor 5 is forward rotated. In this way, the first planet carrier 1031 and the second planet carrier 1041 are fixedly connected through the locking member 105, the torque of the first connecting shaft 108 is transmitted to the second planet carrier 1041 through the first planet carrier 1031 and the locking member 105, the second planet carrier 1041 rotates relative to the housing, and then the second planet carrier 1041 drives the first axle to rotate relative to the vehicle body through the first reduction gear 123 and the second reduction gear 124.

[0077] In the second-gear reverse pure electric drive working condition, the locking member 105 is in the locked position, the fixing member 106 is in the disconnected position, the second brake 107 is in the released state, the motor output shaft 102 is reversed, and the output shaft of the second motor 5 is reversed.

[0078] In the third-gear pure electric drive working condition, the locking member 105 is in the separated position, the fixing member 106 is in the connected position, the second brake 107 is in the released state, the motor output shaft 102 is forward rotated, and the output shaft of the second motor 5 is forward rotated. In this way, the first sun gear 1033 is fixedly connected with the housing, the first connecting shaft 108 drives the first planet carrier 1031 to rotate relative to the housing, the first planet carrier 1031 drives the first ring gear 1032 to rotate relative to the housing, the first ring gear 1032 drives the second planet carrier 1041 to rotate relative to the housing through the connecting member 120, and the second planet carrier 1041 drives the first axle to rotate relative to the vehicle body through the first reduction gear 123 and the second reduction gear 124. In the third-gear reverse pure electric drive working condition, the locking member 105 is in the separated position, the fixing member 106 is in the connected position, the second brake 107 is in the released state, the motor output shaft 102 is reversed, and the output shaft of the second motor 5 is reversed.

[0079] Please refer to Figure 1 , Figure 2And Table 1, the first clutch 4 is in the engaged state under the power split working condition, the engine 3 works, the engine 3 drives the transmission input shaft 101 to rotate relative to the shell, the locking member 122 is in the separated pose, and the first motor 126 functions as a generator. In the process that the transmission input shaft 101 rotates relative to the shell, the transmission input shaft 101 drives the third ring gear 1212 to rotate relative to the shell, the third ring gear 1212 drives the first connecting shaft 108 to rotate relative to the shell, the first connecting shaft 108 drives the first reduction gear 123 to rotate relative to the shell through the first epicyclic gear train 103 and the second epicyclic gear train 104, the first reduction gear 123 drives the second reduction gear 124 to rotate relative to the shell, and the second reduction gear 124 drives the first axle to rotate relative to the vehicle body through the first output shaft 125. In the process that the transmission input shaft 101 rotates relative to the shell, the transmission input shaft 101 drives the third sun gear 1213 to rotate relative to the shell, and further drives the motor output shaft 102 to rotate relative to the shell, and in the process that the motor output shaft 102 rotates relative to the shell, the first motor 126 generates electricity. The second motor 5 is a motor, the output shaft of the second motor 5 rotates in the positive direction, the second motor 5 drives the third reduction gear 6 to rotate relative to the vehicle body, the third reduction gear 6 drives the fourth reduction gear 7 to rotate relative to the vehicle body, and the fourth reduction gear 7 drives the second axle to rotate relative to the vehicle body through the second output shaft 8.

[0080] Please refer to Figure 1 、 Figure 2 and Table 1, in some embodiments of the present application, the power split working condition further includes a first gear working condition, a second gear working condition and a third gear working condition.

[0081] In the first gear power split working condition, the locking member 105 is in the separated pose, the fixing member 106 is in the disconnected pose, and the second brake 107 is in the braking state. In this way, the second ring gear 1042 is fixedly connected with the shell, the first connecting shaft 108 drives the second sun gear 1043 to rotate relative to the shell, the second sun gear 1043 drives the second planet carrier 1041 to move relative to the shell, and the second planet carrier 1041 drives the first axle to rotate relative to the vehicle body through the first reduction gear 123 and the second reduction gear 124.

[0082] In the second gear power split working condition, the locking member 105 is in the locked pose, the fixing member 106 is in the disconnected pose, and the second brake 107 is in the released state. In this way, the first planet carrier 1031 and the second planet carrier 1041 are fixedly connected through the locking member 105, the torque of the first connecting shaft 108 is transmitted to the second planet carrier 1041 through the first planet carrier 1031 and the locking member 105, the second planet carrier 1041 rotates relative to the shell, and further drives the first axle to rotate relative to the vehicle body through the first reduction gear 123 and the second reduction gear 124.

[0083] In the third power split working condition, the locking member 105 is in the separated position, the fixing member 106 is in the connected position, and the second brake 107 is in the released state. In this way, the first sun gear 1033 is fixedly connected with the housing, the first connecting shaft 108 drives the first planet carrier 1031 to rotate relative to the housing, the first planet carrier 1031 drives the first ring gear 1032 to rotate relative to the housing, the first ring gear 1032 drives the second planet carrier 1041 to rotate relative to the housing through the connecting member 120, and the second planet carrier 1041 drives the first axle to rotate relative to the vehicle body through the first reduction gear 123 and the second reduction gear 124.

[0084] Please refer to Figure 1 、 Figure 2 and Table 1, in the engine direct drive working condition, the first clutch 4 is in the engaged state, the engine 3 works, the engine 3 drives the transmission input shaft 101 to rotate relative to the housing, the locking member 122 is in the locked position, the transmission input shaft 101 drives the third planet carrier 1211, the third ring gear 1212 and the third sun gear 1213 to rotate synchronously relative to the housing, the third ring gear 1212 drives the first connecting shaft 108 to rotate relative to the housing, the first connecting shaft 108 drives the first reduction gear 123 to rotate relative to the housing through the first epicyclic gear train 103 and the second epicyclic gear train 104, the first reduction gear 123 drives the second reduction gear 124 to rotate relative to the housing, and the second reduction gear 124 drives the first axle to rotate relative to the vehicle body through the first output shaft 125. The first motor 126 does not work, the second motor 5 works as a motor, the second motor 5 rotates in the forward direction, the second motor 5 drives the third reduction gear 6 to rotate relative to the vehicle body, the third reduction gear 6 drives the fourth reduction gear 7 to rotate relative to the vehicle body, and the fourth reduction gear 7 drives the second axle to rotate relative to the vehicle body through the second output shaft 8.

[0085] Please refer to Figure 1 、 Figure 2 and Table 1, in some embodiments of the present application, the engine direct drive working condition includes a first engine direct drive working condition, a second engine direct drive working condition and a third engine direct drive working condition.

[0086] In the first engine direct drive working condition, the locking member 105 is in the separated position, the fixing member 106 is in the disconnected position, and the second brake 107 is in the braking state. In this way, the second ring gear 1042 is fixedly connected with the housing, the first connecting shaft 108 drives the second sun gear 1043 to rotate relative to the housing, the second sun gear 1043 drives the second planet carrier 1041 to move relative to the housing, and the second planet carrier 1041 drives the first axle to rotate relative to the vehicle body through the first reduction gear 123 and the second reduction gear 124.

[0087] In the two-gear engine direct drive working condition, the locking member 105 is in the locking position, the fixing member 106 is in the disconnected position, and the second brake 107 is in the released state. In this way, the first planet carrier 1031 is fixedly connected with the second planet carrier 1041 through the locking member 105, the torque of the first connecting shaft 108 is transmitted to the second planet carrier 1041 through the first planet carrier 1031 and the locking member 105, so that the second planet carrier 1041 rotates relative to the housing, and then the second planet carrier 1041 drives the first axle relative to the vehicle body to rotate through the first reduction gear 123 and the second reduction gear 124.

[0088] In the three-gear engine direct drive working condition, the locking member 105 is in the separated position, the fixing member 106 is in the connected position, and the second brake 107 is in the released state. In this way, the first sun gear 1033 is fixedly connected with the housing, the first connecting shaft 108 drives the first planet carrier 1031 to rotate relative to the housing, the first planet carrier 1031 drives the first ring gear 1032 to rotate relative to the housing, the first ring gear 1032 drives the second planet carrier 1041 to rotate relative to the housing through the connecting member 120, and the second planet carrier 1041 drives the first axle to rotate relative to the vehicle body through the first reduction gear 123 and the second reduction gear 124.

[0089] Please refer to Figure 1 , Figure 2 and Table 1, in the parallel drive working condition, the first clutch 4 is in the engaged state, the engine 3 is working, the engine 3 drives the transmission input shaft 101 to rotate relative to the housing, the locking member 122 is in the locking position, the first motor 126 and the second motor 5 are both used as electric motors, the third planet carrier 1211, the third ring gear 1212 and the third sun gear 1213 rotate synchronously, the first motor 126 and the second motor 5 are both rotating in the forward direction, and the torque exerted by the first motor 126 on the third sun gear 1213 has the same direction as the torque exerted by the engine 3 on the third planet carrier 1211. The transmission input shaft 101 and the motor output shaft 102 jointly drive the third planet carrier 1211, the third ring gear 1212 and the third sun gear 1213 to rotate relative to the housing synchronously, the third ring gear 1212 drives the first connecting shaft 108 to rotate relative to the housing, the first connecting shaft 108 drives the first reduction gear 123 to rotate relative to the housing through the first epicyclic gear train 103 and the second epicyclic gear train 104, the first reduction gear 123 drives the second reduction gear 124 to rotate relative to the housing, and the second reduction gear 124 drives the first axle to rotate relative to the vehicle body through the first output shaft 125. The second motor 5 drives the third reduction gear 6 to rotate relative to the vehicle body, the third reduction gear 6 drives the fourth reduction gear 7 to rotate relative to the vehicle body, and the fourth reduction gear 7 drives the second axle to rotate relative to the vehicle body through the second output shaft 8.

[0090] Please refer to Figure 1 , Figure 2 Figure 1 Figure 2 Figure 1 Figure 2 Figure 1 Figure 2 Figure 1 Figure 2 Figure 1 Figure 2 Figure 1 Figure 2 Figure 1 Figure 2 Figure 1 Figure 2 Figure 1 Figure 2 Figure 1 Figure 2 Figure 1 Figure 2 Figure 1 Figure 2 Figure 1 Figure 2 Figure 1 Figure 2And Table 1, in some embodiments of the application, parallel drive working conditions further include a first parallel drive working condition, a second parallel drive working condition and a third parallel drive working condition.

[0091] In the first parallel drive working condition, the locking member 105 is in the separated position, the fixing member 106 is in the disconnected position, and the second brake 107 is in the braking state. In this way, the second ring gear 1042 is fixedly connected with the housing, the first connecting shaft 108 drives the second sun gear 1043 to rotate relative to the housing, the second sun gear 1043 drives the second planet carrier 1041 to move relative to the housing, and the second planet carrier 1041 drives the first axle to rotate relative to the vehicle body through the first reduction gear 123 and the second reduction gear 124.

[0092] In the second parallel drive working condition, the locking member 105 is in the locked position, the fixing member 106 is in the disconnected position, and the second brake 107 is in the released state. In this way, the first planet carrier 1031 and the second planet carrier 1041 are fixedly connected through the locking member 105, the torque of the first connecting shaft 108 is transmitted to the second planet carrier 1041 through the first planet carrier 1031 and the locking member 105, so that the second planet carrier 1041 rotates relative to the housing, and the second planet carrier 1041 drives the first axle to rotate relative to the vehicle body through the first reduction gear 123 and the second reduction gear 124.

[0093] In the third parallel drive working condition, the locking member 105 is in the separated position, the fixing member 106 is in the connected position, and the second brake 107 is in the released state. In this way, the first sun gear 1033 is fixedly connected with the housing, the first connecting shaft 108 drives the first planet carrier 1031 to rotate relative to the housing, the first planet carrier 1031 drives the first ring gear 1032 to rotate relative to the housing, the first ring gear 1032 drives the second planet carrier 1041 to rotate relative to the housing through the connecting member 120, and the second planet carrier 1041 drives the first axle to rotate relative to the vehicle body through the first reduction gear 123 and the second reduction gear 124.

[0094] Table 1

[0095]

[0096] The above embodiments are only used to illustrate the technical solutions of the present application, but not limit it; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should be covered in the scope of the claims and the specification of the present application. Especially, as long as there is no structural conflict, each technical feature mentioned in each embodiment can be combined in any way.

Claims

1. A vehicle transmission characterized by, The vehicle transmission comprises: a housing; a transmission input shaft rotatably connected to the housing; a motor output shaft rotatably connected to the housing; a first epicyclic gear train comprising a first carrier, a first ring gear and a first sun gear, the first carrier and the first ring gear are rotatably connected to the housing, the first carrier is in transmission connection with the transmission input shaft and the motor output shaft, the first sun gear is separably fixed to the housing; a second epicyclic gear train comprising a second carrier, a second ring gear and a second sun gear, the second sun gear is coaxially fixed to the first carrier, the second carrier is coaxially fixed to the first ring gear, the second carrier is configured to be in transmission connection with an axle, and the second ring gear is separably fixed to the housing.

2. The vehicle transmission of claim 1, wherein, One of the first carrier and the second carrier is movably provided with a locking member, the locking member has a locking position and a separation position, in the locking position, the locking member is connected to the other one of the first carrier and the second carrier to fixedly connect the first carrier and the second carrier, in the separation position, the other one of the first carrier and the second carrier is separated from the locking member to disconnect the fixed connection between the first carrier and the second carrier.

3. The vehicle transmission of claim 1, wherein, Further comprising a fixing member movably provided in the housing, the fixing member has a connection position and a disconnection position, in the connection position, the fixing member is connected to the first sun gear to fixedly connect the first sun gear and the housing, in the disconnection position, the fixing member is separated from the first sun gear to disconnect the fixed connection between the fixing member and the first sun gear.

4. The vehicle transmission of claim 3, wherein, In the axial direction of the first epicyclic gear train, the fixing member is located on the side of the first epicyclic gear train away from the second epicyclic gear train. The vehicle transmission further comprises a first connecting shaft coaxial with the first epicyclic gear train, a first end of the first connecting shaft is located on the side of the first sun gear away from the second sun gear, the first end of the first connecting shaft is rotatably connected to the housing, and a second end of the first connecting shaft extends through the first sun gear to the other side of the first sun gear, the second end of the first connecting shaft is fixedly connected to the first carrier.

5. The vehicle transmission of claim 1, wherein, The second carrier comprises a second mounting shaft, and the second planetary gear of the second epicyclic gear train is sleeved on the second mounting shaft. The vehicle transmission further comprises a connecting member located between the first epicyclic gear train and the second epicyclic gear train in the axial direction of the first epicyclic gear train, one end of the connecting member is fixedly connected to the first ring gear, and the other end of the connecting member is fixedly connected to the second mounting shaft.

6. The vehicle transmission of claim 1, wherein, Further comprising a second connecting shaft coaxial with the second epicyclic gear train, the second connecting shaft is arranged on the side of the second epicyclic gear train away from the first epicyclic gear train in the axial direction, one end of the second connecting shaft is fixedly connected to the second carrier, and the other end of the second connecting shaft is rotatably connected to the housing.

7. The vehicle transmission of any one of claims 1-6, wherein, A third epicyclic gear train is also included, the third epicyclic gear train including a third carrier, a third ring gear and a third sun gear, the third carrier being fixed coaxially with the transmission input shaft, the third sun gear being fixed coaxially with the motor output shaft, the third ring gear being in driving connection with the first carrier.

8. The vehicle transmission of claim 7, wherein, One of the third carrier, the third ring gear and the third sun gear is movably connected with a locking member, the locking member having a locking position and a separated position, in the locking position, the locking member is connected with another one of the third carrier, the third ring gear and the third sun gear to relatively fix the third carrier, the third ring gear and the third sun gear, in the separated position, the other one of the third carrier, the third ring gear and the third sun gear is separated from the locking member.

9. A power system characterized by, The power system comprises: an engine; a first axle; the vehicle transmission of any one of claims 1 to 8, the second carrier being in driving connection with the first axle, the transmission input shaft having at least a connected state in which the transmission input shaft is in driving connection with an output shaft of the engine.

10. A vehicle characterized by comprising: The power system of claim 9 is included.

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